With the continuous upgrading of global food packaging, agricultural mulching, industrial protective film and medical packaging industries, the market demand for high-performance plastic films is growing rapidly. Traditional single-layer extrusion film lines can no longer meet the comprehensive requirements of modern packaging for barrier performance, mechanical strength, heat sealing performance and material cost. Multi-layer co-extrusion technology extrudes different functional materials through multiple extruders and compounds them into a single film in the die head, which can realize the superposition of multiple functions such as barrier layer, heat sealing layer and structural support layer in one film. This technology not only greatly improves the comprehensive performance of the film, but also saves the use of high-value barrier materials through layered design, which has become the mainstream technical direction of the high-end film production industry.
While pursuing performance improvement, the global manufacturing industry is also facing the pressure of rising energy costs. For plastic film production enterprises, electricity consumption accounts for a large proportion of the total production cost. Traditional film extrusion lines generally have problems such as low drive efficiency, large heat loss and high no-load energy consumption, which push up the unit production cost. At the same time, the thickness uniformity of the film directly determines the product qualification rate, material utilization rate and subsequent processing performance. Poor thickness uniformity will not only cause waste of raw materials, but also affect the printing, compounding and heat sealing effects of subsequent processes, reducing the market competitiveness of products. Therefore, reducing energy consumption and improving thickness uniformity have become the two core demands of film production enterprises for equipment upgrading.
As a professional manufacturer focusing on plastic extrusion equipment, Yuansu has deeply cultivated extrusion technology for many years. Its multi-layer co-extrusion film production line adopts a new generation of energy-saving drive system, optimized screw and flow channel design and intelligent closed-loop control system. On the premise of ensuring stable and reliable equipment performance, it achieves 25% lower comprehensive energy consumption than traditional similar equipment, and the film thickness uniformity reaches the industry leading level. This series of equipment covers 3-layer, 5-layer and 7-layer co-extrusion schemes, with a variety of width and output specifications, which can meet the production needs of different fields such as food barrier packaging, agricultural greenhouse film, industrial stretch film and medical packaging film. This paper will systematically analyze the technical principle of energy saving and uniformity improvement of multi-layer co-extrusion film lines, explain the equipment structure, configuration options and application scenarios in detail, provide detailed investment cost and return on investment analysis, and introduce the technical advantages and service support of Yuansu equipment, so as to provide a comprehensive decision-making reference for film production enterprises to carry out capacity upgrading and cost reduction.
1. Market Demand and Technical Advantages of Multi-Layer Co-Extrusion Films
1.1 Growth of Global High-Performance Film Market Demand
In recent years, the global demand for high-performance plastic films has maintained a steady growth trend. In the field of food packaging, with the improvement of food safety requirements and the development of cold chain logistics, the demand for high barrier packaging films such as oxygen barrier and moisture barrier is growing rapidly. Multi-layer co-extruded films with EVOH, PA and other barrier layers can effectively extend the shelf life of food, and have become the standard configuration of medium and high-end food packaging. In the agricultural field, multi-layer composite greenhouse films and mulching films with functions of dripping prevention, heat preservation and aging resistance have higher economic benefits than ordinary single-layer films, and the market penetration rate is increasing year by year.
In the field of industrial packaging, stretch winding film, protective film and waterproof roll film put forward higher requirements for the tensile property, uniformity and puncture resistance of the film. In the medical and health field, sterile packaging films and medical protective films have extremely strict requirements on the uniformity, cleanliness and mechanical properties of the films. Under this market background, the production capacity of traditional single-layer film lines is gradually eliminated, and the demand for multi-layer co-extrusion film lines with better performance is increasing. For film production enterprises, introducing advanced multi-layer co-extrusion equipment is not only an inevitable choice to meet the upgrading of downstream demand, but also a key way to improve product added value and market competitiveness.
1.2 Core Pain Points of Traditional Film Extrusion Lines
Traditional film extrusion equipment, whether single-layer or early multi-layer co-extrusion lines, generally has two core pain points. The first is high energy consumption. Most of the traditional equipment uses ordinary asynchronous motors with frequency conversion speed regulation, with low energy efficiency, especially under low load and standby conditions, the energy waste is serious. The heating system adopts ordinary resistance heating without thermal insulation design, and a large amount of heat is dissipated into the air, resulting in high heating energy consumption. The unreasonable screw and flow channel design leads to large melt pressure loss, which requires higher drive power to maintain the same output, further increasing energy consumption. According to industry statistics, the energy consumption of traditional film extrusion lines accounts for about 15% to 20% of the total production cost, and has been rising with the increase of electricity prices, eroding the profit space of enterprises.
The second pain point is insufficient thickness uniformity. The distribution of melt in the die head of traditional equipment is uneven, and the control accuracy of each extruder is poor, resulting in large thickness deviation of the finished film, usually up to ±8% to ±10%. Excessive thickness deviation will not only lead to the increase of raw material waste and push up the unit cost, but also affect the printing and composite effect of subsequent processes, resulting in a decline in product grade. At the same time, the unstable longitudinal thickness will also affect the winding quality, leading to problems such as uneven roll surface and broken film in the later use. For high-end film products with strict thickness requirements, traditional equipment is difficult to meet the quality standards, which restricts the upgrading of enterprise product structure.
1.3 Value of Energy Saving and Uniformity Improvement for Production Enterprises
Reducing energy consumption and improving uniformity can bring tangible economic benefits to production enterprises. In terms of energy saving, taking a medium-sized film production line with an hourly output of 300kg as an example, the traditional line consumes about 180kWh per ton of film. If the energy consumption is reduced by 25%, the power consumption per ton can be reduced by 45kWh. Calculated by 6000 hours of annual operation and industrial electricity price of 0.1 US dollars per kWh, the annual electricity cost can be saved by about 8,100 US dollars. For large production lines with higher output, the annual energy saving benefit can reach tens of thousands of dollars.
In terms of uniformity improvement, if the thickness deviation is reduced from ±8% to ±3%, the raw material utilization rate can be increased by about 5%, which means that 50kg more qualified products can be produced per ton of raw materials. Calculated by the raw material price of 1,200 US dollars per ton, it can save 60 US dollars per ton of raw materials, and the annual savings can reach more than 100,000 US dollars. At the same time, the improvement of uniformity can also improve the product grade, increase the selling price of products, and bring higher premium space. In addition, stable product quality can reduce customer complaints and after-sales costs, and enhance the brand image of enterprises. Therefore, the technical upgrading of energy saving and uniformity improvement has a very high return on investment, which is the priority direction for film production enterprises to upgrade their equipment.
2. Technical Principles of 25% Lower Power Consumption Design
2.1 High Efficiency Servo Drive System
The drive system is the core energy-consuming part of the extrusion line, and its efficiency directly determines the overall energy consumption level. Yuansu multi-layer co-extrusion film lines are all equipped with high-performance servo drive systems. Each extruder is driven by an independent servo motor. Compared with the traditional variable frequency drive system, the servo motor has higher energy conversion efficiency, especially under medium and low load conditions, the energy-saving advantage is more obvious. The servo system can accurately adjust the output speed and torque according to the actual load demand of the screw. When the load is low, it automatically reduces the power output, avoiding the energy waste caused by the constant speed operation of the traditional motor.
The servo drive system also has excellent low-speed torque characteristics, which can provide stable torque output at low speed, ensuring stable extrusion of materials at different process speeds without additional power compensation. The system has fast response speed, which can quickly adjust the rotating speed when the process parameters change, maintain stable extrusion pressure, and reduce energy loss caused by pressure fluctuation. Through practical testing, compared with the traditional variable frequency drive extruder of the same specification, the servo drive scheme can save 18% to 22% of the drive power consumption alone. With the optimization of other systems, the comprehensive energy consumption of the whole line can be reduced by 25% on average, reaching the industry leading energy efficiency level.
2.2 Optimized Screw Plasticizing Structure
The plasticizing efficiency of the screw directly affects the energy consumption per unit output. Yuansu adopts the newly designed barrier mixing screw for each extruder of the co-extrusion line. The screw is designed with multi-stage gradual melting structure, which can realize the gradual melting of materials and full mixing under relatively low shear strength, and improve the plasticizing efficiency per unit energy consumption. Compared with the ordinary screw, under the same output, the required driving torque is smaller, which reduces the power consumption of the drive end.
The inner wall of the barrel is matched with a high-efficiency heat conduction structure, which can make the heating heat transfer to the material more quickly, reduce the heat loss in the conduction process, and shorten the heating time. The surface of the screw is treated with wear-resistant and corrosion-resistant alloy, which maintains high plasticizing efficiency for a long time and avoids the increase of energy consumption caused by wear. The optimized screw structure not only improves the plasticizing quality, but also reduces the specific energy consumption per kilogram of material, which is one of the core supports for achieving the 25% energy saving goal.
2.3 Intelligent Temperature Control and Thermal Insulation Design
The heating system accounts for a large proportion of the energy consumption of the extrusion line, and the energy waste caused by heat dissipation is an important reason for high energy consumption. Yuansu multi-layer co-extrusion film line adopts high-precision PID closed-loop temperature control system, which can accurately control the temperature of each heating zone within ±0.5℃, avoiding the energy waste caused by frequent heating and cooling. The heating element adopts high-efficiency ceramic heater with high electrothermal conversion efficiency, which can convert more electric energy into heat energy.
At the same time, the outer layer of each heating zone of the barrel and die head is covered with a high-temperature resistant thermal insulation layer, which can effectively reduce the outward radiation and conduction loss of heat. Tests show that the thermal insulation design can reduce the surface temperature of the barrel by more than 30℃, reduce the heating start-up frequency by about 30%, and save 20% to 25% of heating energy consumption. The thermal insulation design also reduces the ambient temperature of the production workshop, improves the working environment, and reduces the power consumption of workshop ventilation and cooling. In addition, the system is equipped with an energy-saving standby mode. When the equipment is temporarily shut down, it automatically reduces the holding temperature and enters the heat preservation state, which reduces the energy consumption during standby.
2.4 Low Resistance Runner and Energy Saving Auxiliary Configuration
Unreasonable flow channel design will lead to large melt pressure loss. In order to maintain the required outlet pressure, the extruder has to increase the rotating speed and output power, resulting in additional energy consumption. Yuansu has carried out fluid dynamics simulation optimization for the melt flow channels of distribution device and die head. The flow channel adopts smooth transition design without dead angle and sudden change of section, which reduces the flow resistance and pressure loss of melt in the flow channel, so that the pressure output by the extruder can be more efficiently used for film forming, reducing the ineffective energy loss.
The auxiliary systems such as cooling air ring and traction motor also adopt energy-saving configuration. The cooling fan adopts frequency conversion speed regulation, which automatically adjusts the air volume according to the cooling demand, avoiding the energy waste of long-term full speed operation. The traction system adopts servo control, with accurate speed regulation and low energy consumption. The edge material online recycling system directly sends the edge material back to the extruder for reuse, reducing the energy consumption caused by secondary granulation and reprocessing. The multi-dimensional energy-saving design covers all links of the whole production line, ensuring that the 25% energy-saving effect can be truly achieved in actual production.
3. Technical Guarantee of Superior Film Thickness Uniformity
3.1 Precision Multi-Layer Melt Distribution System
Uniform melt distribution is the premise to ensure the thickness uniformity of multi-layer films. Yuansu co-extrusion distribution device adopts spiral distribution structure, and each layer of melt is evenly distributed in the circumferential direction through multiple stages of shunting and superposition. The flow channel is simulated and optimized by professional fluid dynamics software to ensure that the melt flow velocity and pressure at each position are consistent when entering the die head, avoiding the thickness deviation caused by uneven material distribution.
Each layer is equipped with an independent flow control valve, which can fine adjust the output of each layer to accurately control the thickness proportion of each layer. For products with different layer ratios, the corresponding parameters can be quickly adjusted through the control system to ensure the accuracy of each layer thickness. The distribution device is made of high-quality alloy steel after precision machining and polishing, and the inner wall is smooth without dead angle, which ensures the stable flow of melt and avoids the influence of local retention on uniformity.
3.2 High Precision Die Head with Flexible Adjustment
The die head is the core component that determines the thickness uniformity of the film. Yuansu multi-layer co-extrusion die head adopts the classic hanger type flow channel design, which can realize uniform distribution of melt in the width direction. The die lip part adopts the design of flexible adjustment mechanism, and the gap of the die lip can be fine adjusted point by point along the width direction. Operators can adjust the local die lip gap according to the thickness detection results, so as to correct the transverse thickness deviation of the film.
The die head is also designed with thermal expansion compensation function, which can offset the influence of thermal expansion of die head parts on the die lip gap, and maintain the stability of the gap during long-term continuous production. The flow channel surface is treated with hard chrome plating and precision polishing, with low friction resistance and uniform material flow. For wide-width film lines, a multi-stage diversion structure is adopted to ensure that the melt flow rate at the edge and the middle position is consistent, avoiding the common problem of thick middle and thin edges in wide-width films. Through the above design, the transverse thickness deviation of the film can be controlled within ±3%, reaching the leading level in the industry.
3.3 Multi-Machine Synchronous Control Technology
Multi-layer co-extrusion requires multiple extruders to work together. The speed matching accuracy of each extruder directly affects the longitudinal thickness stability of the film. Yuansu adopts the central synchronous control system, and all extruders, traction machines and winding machines are uniformly dispatched by the main controller. The speed error between each drive unit is controlled within 0.1%, ensuring the stable proportion of materials in each layer and avoiding longitudinal thickness fluctuation caused by speed mismatch.
The system has a melt pressure closed-loop control function. When the melt pressure at the die head fluctuates, it will automatically fine adjust the screw speed to maintain the stability of the extrusion pressure, so as to ensure the stable output of the melt per unit time and the uniform longitudinal thickness of the film. The closed-loop control response speed is fast, which can suppress the pressure fluctuation in a very short time and avoid the formation of obvious thickness deviation. Stable synchronous control ensures that the film has consistent thickness and performance in the whole production process, and reduces the waste of start-up and shutdown materials.
3.4 Online Thickness Measurement and Closed-Loop Feedback
For high-end configuration models, Yuansu can be equipped with an online thickness detection system, which uses infrared or beta ray thickness gauges to scan the film thickness in real time along the width direction. The detection data is transmitted to the control system in real time and compared with the set thickness value. The system automatically adjusts the die lip gap and extrusion speed according to the deviation, forming a complete closed-loop control of thickness.
The automatic thickness adjustment system can correct the thickness deviation in time without manual intervention, greatly reducing the influence of human factors and maintaining the long-term stability of film thickness. For products with frequent model changes, the system can also automatically call the corresponding process parameters and quickly complete the thickness debugging after model change, shortening the commissioning time and reducing the waste of materials. With the online closed-loop control system, the comprehensive thickness deviation of the film can be further reduced to less than ±2%, which can meet the production requirements of the highest grade precision films.
4. Structure and Configuration of Yuansu Multi-Layer Co-Extrusion Film Line
4.1 Extrusion Unit Series
Yuansu multi-layer co-extrusion film lines are equipped with corresponding extrusion units according to different layer numbers and output requirements. Each extruder adopts high-quality alloy steel barrel and screw, with surface nitriding treatment, which has good wear resistance and corrosion resistance. The length diameter ratio of the screw is 28:1 to 32:1, which can be selected according to different material types, ensuring sufficient plasticizing capacity and good mixing effect.
The 3-layer co-extrusion scheme is usually composed of one main extruder and two auxiliary extruders, which is suitable for the production of ordinary composite films, stretch films and agricultural mulching films, and has the best cost performance. The 5-layer co-extrusion scheme adds a special barrier layer extruder, which can produce high barrier food packaging films with EVOH or PA as the barrier layer, and is the mainstream configuration in the current market. The 7-layer and more co-extrusion schemes are suitable for high-end complex functional films, which can realize more functional layer combinations and meet the most stringent barrier and mechanical property requirements. Each extruder is equipped with an independent temperature control system and servo drive, which can be independently adjusted according to the process requirements of different materials.
4.2 Co-Extrusion Distribution and Die Head System
The co-extrusion distributor adopts spiral mandrel structure, which can evenly compound the melts of different layers without disturbing the interface between layers, ensuring clear layers and stable thickness proportion of each layer. The number of layers and flow channel size can be customized according to customer product requirements to adapt to different material combinations and layer proportion schemes. The distributor is equipped with a heating and temperature control system to ensure uniform melt temperature and avoid performance impact caused by temperature drop.
The die head adopts vertical upward blowing structure for blown film lines and horizontal T-shaped structure for cast film lines. The die head width covers 800mm to 3000mm, and can also be customized to wider specifications. The die lip is made of high hardness alloy steel after precision machining, with smooth surface and long service life. The manual or automatic die lip adjustment mechanism can be selected according to the budget and demand. All die heads have been strictly tested before leaving the factory to ensure uniform discharge and stable thickness.
4.3 Cooling, Traction and Winding System
The cooling system is an important link affecting film quality and production efficiency. For blown film lines, Yuansu is equipped with a high-efficiency double lip air ring with uniform air outlet and strong cooling capacity, which can quickly cool the film bubble, improve production speed and ensure uniform cooling around the film bubble. For high-end models, an internal cooling system can be configured to cool both inside and outside at the same time, further improving the cooling efficiency and film uniformity.
The traction system adopts servo motor drive with stable speed and accurate tension control. The traction roller is made of high-precision mirror roller to ensure smooth film surface without scratch. The herringbone plate and guide roller are reasonably arranged to ensure stable lifting of the film bubble without swing. The winding system adopts automatic tension control, which can maintain constant winding tension with the increase of winding diameter, ensuring flat and tight film roll without wrinkle. It is equipped with an automatic roll changing mechanism, which can realize non-stop roll changing, reduce material waste during roll changing and improve production efficiency. The edge material produced by slitting is sent back to the feeding system through the edge material crushing and recycling device for direct reuse, which improves the utilization rate of raw materials.
4.4 Intelligent Control System
The whole line adopts PLC control system and large-size color touch screen human-machine interface. All process parameters such as temperature, speed, pressure and tension can be set and monitored on the touch screen. The operation is intuitive and simple. The system supports storage of hundreds of sets of process formulas. When changing products, you can directly call the corresponding formulas without resetting parameters one by one, which greatly shortens the commissioning time after model change.
The system has complete fault self-diagnosis and alarm functions. It can monitor the operation status of all components in real time. In case of abnormality, it will give an alarm in time and display the cause of the fault and treatment suggestions, which is convenient for operators to quickly troubleshoot. The optional remote diagnosis module allows after-sales engineers to remotely view the equipment operation status and solve program and process problems online, greatly shortening the fault handling time. The production statistics function can automatically record output, energy consumption, operation time and other data, generate production reports, and help enterprises carry out production management and cost accounting.
4. Application Scenarios and Material Adaptability
4.1 Food Barrier Packaging Film Production
Food packaging is the most important application field of multi-layer co-extruded films. 5-layer or 7-layer co-extrusion lines can produce composite films with PA or EVOH as the middle barrier layer, PE or PP as the heat sealing layer and structural layer. This kind of film has excellent oxygen and moisture barrier properties, which can effectively extend the shelf life of food, and is widely used in meat products, dairy products, condiments, convenience food and other packaging.
The superior thickness uniformity of Yuansu film line ensures the stability of barrier layer thickness, avoids the decline of barrier performance caused by local thin barrier layer, and ensures the qualified rate of products. The energy-saving design reduces the production cost, so that enterprises can maintain price advantage while providing high-quality products. The equipment can adapt to the processing of various food contact grade materials, meets the food safety standards of all countries in the world, and helps food packaging enterprises pass various system certifications smoothly.
4.2 Agricultural Greenhouse Film and Mulching Film Production
Agricultural film is another major application field of multi-layer co-extrusion technology. Multi-layer composite agricultural films can integrate drip resistance, heat preservation, anti-aging, light conversion and other functions, which can effectively improve crop yield and quality, and have higher economic benefits than ordinary single-layer agricultural films. Yuansu wide-width multi-layer co-extrusion film line can produce greenhouse films with a width of more than 10 meters after folding, meeting the needs of large agricultural facilities.
The uniform thickness ensures the consistent performance of all parts of the agricultural film, avoids premature aging and damage of local thin positions, and prolongs the service life of the film. The high-efficiency energy-saving design reduces the production cost of agricultural film, making it more popular in the market. The equipment can process PE, EVA and other agricultural film special materials, and can add various functional masterbatches to meet the production needs of different functional agricultural films.
4.3 Industrial Stretch Film and Protective Film Production
Industrial stretch winding film and surface protective film have high requirements for the tensile property, thickness uniformity and surface flatness of the film. Multi-layer co-extruded stretch film has better tensile strength and elongation at break, uniform force during winding, and better packaging and protection effect. Yuansu 3-layer or 5-layer co-extrusion film lines can produce high-performance stretch films with stable stretching performance and uniform thickness, which can reduce the unit consumption of packaging films for end customers.
The stable extrusion system ensures the uniform distribution of adhesive layer materials, avoids the problems of glue opening and degumming of protective film products. High yield and low energy consumption further reduce the unit cost and improve the market competitiveness of products. The equipment can also produce various industrial films such as waterproof roll film, garbage bag film and express bag film, with strong versatility, which is very suitable for film production enterprises with diversified product structures.
4.4 Medical and Special Functional Film Production
Medical packaging films and special functional films have extremely strict requirements on film cleanliness, uniformity and stability. Yuansu multi-layer co-extrusion film line can be equipped with a clean production scheme. The parts in contact with materials are made of food grade or medical grade materials, which reduces the generation of crystal points and impurities and meets the cleanliness requirements of medical production.
High-precision thickness control ensures the consistency of product performance between batches, which meets the strict quality requirements of the medical industry. The equipment can also be used for the production of special films such as breathable films, degradable films and high-temperature cooking films. For degradable materials such as PLA and PBAT, the optimized screw and temperature control system can achieve good plasticizing effect, avoid material degradation, and meet the production needs of new environmental protection films.
5. Equipment Model Selection and Cost Benefit Analysis
5.1 Price Reference for Different Configuration Models
Yuansu multi-layer co-extrusion film lines have a variety of specifications and configurations, and the prices vary greatly according to the number of layers, output, width and configuration grade.
The small 3-layer co-extrusion blown film line has a finished film width of 800 to 1200mm and an hourly output of 80 to 150kg. It is suitable for small film factories and supporting use of product factories. The standard configuration price ranges from 78,000 to 125,000 US dollars. The medium-sized 5-layer co-extrusion blown film line has a finished film width of 1500 to 2000mm and an hourly output of 200 to 350kg. It is the mainstream model for food packaging and general industrial film production. The standard configuration price ranges from 210,000 to 320,000 US dollars. If configured with automatic thickness measurement and internal cooling system, the price will increase by 35,000 to 60,000 US dollars accordingly.
The large 7-layer high barrier co-extrusion film line has a finished film width of 2000 to 3000mm and an hourly output of 400 to 700kg. It is suitable for large-scale food packaging film and high-end functional film production. The price ranges from 450,000 to 680,000 US dollars according to the configuration. In addition to blown film lines, Yuansu also provides cast film co-extrusion lines, with prices ranging from 380,000 to 850,000 US dollars according to specifications and configurations. All models can be customized according to customer site conditions and process requirements.
5.2 Initial Investment and Operating Cost Composition
Taking the medium-sized 5-layer co-extrusion film line with a width of 1800mm and an output of 300kg per hour as an example, the total initial investment includes equipment host cost, auxiliary equipment cost, installation and commissioning cost and initial raw material reserve. The standard configuration equipment host costs about 265,000 US dollars, supporting air compressor, cooling water tower, material mixer and other auxiliary equipment costs about 25,000 to 35,000 US dollars, installation, commissioning and personnel training costs are included in the equipment quotation, and the initial raw material and spare parts reserve is about 15,000 US dollars. The total initial investment is about 305,000 to 315,000 US dollars.
In terms of annual operating costs, calculated on the basis of 300 working days per year and 20 hours per day, the annual effective production time is 6,000 hours, with an annual output of about 1,800 tons. Electricity cost: the traditional line consumes about 180kWh per ton, and the energy consumption of Yuansu line is reduced by 25%, which is 135kWh per ton. Calculated at 0.1 US dollars per kWh, the annual electricity cost is about 24,300 US dollars, saving about 8,100 US dollars per year compared with the traditional line. Raw material cost: calculated at 1,200 US dollars per ton of raw material, the traditional line has a yield of 92% due to thickness deviation, while Yuansu line has a yield of 97% due to good uniformity. The raw material cost per ton of finished products is saved by about 65 US dollars, and the annual raw material cost is saved by about 117,000 US dollars. Labor cost: 2 operators per shift, 4 people in total, with an annual salary of 6,000 US dollars per person, and the annual labor cost is 24,000 US dollars. Maintenance and spare parts cost is about 4,500 US dollars per year. Other management and site costs are about 18,000 US dollars per year.
5.3 Profit Estimation and Investment Payback Period
Calculated by the average selling price of multi-layer composite film of 1,500 US dollars per ton, the annual sales revenue is about 2,700,000 US dollars. The raw material cost is about 1,800 × 1200 / 0.97 ≈ 2,226,800 US dollars. After deducting raw material costs and various operating costs, the annual net profit is about 407,200 US dollars.
Calculated on the basis of total initial investment of 310,000 US dollars, the static investment payback period is about 9 months. Even considering factors such as capacity climbing and market fluctuation in the initial stage, the investment can be recovered within 12 to 15 months. If producing high value-added high barrier films and functional films, the product profit margin is higher, and the investment return cycle will be shorter. It can be seen that the multi-layer co-extrusion film line with low energy consumption and high uniformity has a very high return on investment. The cost saved by energy saving and yield improvement alone can recover the equipment investment in a short time, and then continue to create profits for enterprises.
6. Installation, Operation and Daily Maintenance Guidelines
6.1 Site Preparation and Installation Process
Before the equipment arrives, the customer needs to complete the site preparation according to the installation drawings provided by Yuansu. Ensure that the plant height meets the equipment installation requirements, the ground is flat and solid, and can bear the weight of the equipment. Reserve corresponding power supply, cooling water and compressed air interfaces near the equipment location, with capacity matching the rated parameters of the equipment. Reserve sufficient operation and maintenance space around the equipment to facilitate daily operation and later maintenance.
After the equipment arrives, Yuansu will arrange professional engineers to guide the installation and commissioning on site. The installation and commissioning cycle of standard models is about 10 to 15 working days. After commissioning, trial production will be carried out with materials to ensure that the output and product quality meet the agreed standards. During the commissioning period, engineers will provide systematic operation and maintenance training for the customer’s operators and maintenance personnel to ensure that the personnel can master basic operation, daily maintenance and common fault handling skills after the engineers leave.
6.2 Standard Operation and Daily Maintenance
Standardized operation and maintenance can ensure the long-term stable operation of the equipment and maintain the advantages of low energy consumption and high uniformity. Before starting the machine every day, check whether the equipment is normal, preheat step by step according to the set temperature curve, and start production after the temperature reaches the set value and is stable for a period of time. During production, patrol the equipment every 1 to 2 hours, pay attention to temperature, pressure, current and product quality, and make operation records. After shutdown, clean the equipment surface, arrange residual materials, and cut off the power supply and water and gas valves after the temperature drops to a safe range.
Weekly maintenance includes cleaning the equipment surface, checking the fastening of pipeline joints and supplementing lubricating grease. Check the filter screen of the feeding system monthly and clean or replace it in time. Check the working condition of the cooling system and check whether the air outlet of the air ring is unobstructed. Check the wear of screw and barrel every quarter. Conduct a comprehensive overhaul every year, replace aging seals and wearing parts, and calibrate temperature and pressure sensors. Scientific maintenance can maintain the performance accuracy of the equipment for a long time, ensure that the energy consumption and uniformity indicators are always maintained at the factory level, and extend the service life of the equipment.
6.3 Common Problems and Solutions
Uneven film thickness is a common problem in production. If the transverse thickness deviation is large, first check whether the die lip gap is adjusted evenly, whether the heating temperature of each zone of the die head is normal, and whether the cooling air volume is uniform. If the longitudinal thickness fluctuates, check whether the extrusion speed is stable, whether the traction tension is constant, and whether the raw material has large performance fluctuation. Corresponding adjustments shall be made according to different reasons to restore the thickness to the standard range.
Crystal points and fish eyes on the film surface are usually caused by incomplete plasticization or material degradation. It is necessary to appropriately increase the plasticizing temperature or adjust the screw speed to ensure sufficient plasticization. If the energy consumption of the equipment increases abnormally, check whether the heating insulation layer is damaged, whether the screw is seriously worn, and whether the drive system fails. Timely troubleshooting can restore the energy-saving performance of the equipment. Yuansu after-sales team can also provide remote guidance to help customers quickly solve various problems in production.
7. Yuansu Technical Advantages and Service Support
7.1 R & D Strength and Manufacturing Quality Control
Yuansu has many years of technical accumulation in the field of plastic extrusion equipment, and has a professional R & D team composed of senior engineers in the industry. The company keeps close technical exchanges with domestic and foreign industry institutions, continuously optimizes equipment structure and process performance, and ensures that products are always at the advanced level of the industry. All core components are processed by high-precision machine tools and undergo strict quality inspection to ensure machining accuracy and assembly quality.
The company has a perfect quality management system. Each equipment must undergo strict factory inspection and load test before delivery. All performance indicators can leave the factory only after reaching the design standards. Strict quality control ensures that each delivered equipment has stable and reliable performance, can achieve the promised energy-saving effect and uniformity index, and protects the investment interests of customers.
7.2 Customized Scheme and Whole Process Service
Yuansu provides customized services for each customer. Before sales, professional technical engineers will deeply understand the customer’s product type, output demand, site conditions and budget, and recommend the most appropriate equipment configuration and process scheme for customers. For customers with special process requirements, targeted design and transformation can be carried out to ensure that the equipment can meet the actual production needs of customers to the greatest extent.
The company provides one-stop service from scheme design, equipment manufacturing, installation and commissioning to personnel training and after-sales maintenance. Customers only need to put forward demand, and Yuansu will be responsible for the whole process to ensure that the project is put into production smoothly. For new entrants to the industry, the company can also provide process formula guidance and production management suggestions to help customers avoid detours and put into operation quickly.
7.3 Perfect After-sales Service and Spare Parts Supply
Yuansu provides customers with full life cycle after-sales service. All equipment comes with a 12-month free warranty. During the warranty period, if there are quality problems under normal use, free on-site maintenance and parts replacement services are provided. After the warranty period, lifetime technical support and preferential supply of spare parts are provided.
The after-sales team responds to customer fault feedback within 24 hours, gives priority to remote diagnosis to solve problems, and arranges on-site service if necessary. Sufficient spare parts warehouse ensures that commonly used vulnerable parts can be delivered quickly, shortening the waiting time for spare parts. The company also provides regular return visit service to understand the operation of the equipment, put forward maintenance suggestions, and help customers do a good job in equipment management to maximize the value of equipment investment.
Conclusion
Multi-layer co-extrusion technology represents the development direction of high-performance film production. While realizing the superposition of multiple functions of films, it also has great optimization space in energy saving and quality improvement. Yuansu multi-layer co-extrusion film line achieves 25% lower comprehensive energy consumption and industry-leading thickness uniformity through technical optimization in drive system, screw structure, temperature control design and control system, which can bring tangible cost reduction and quality improvement benefits to film production enterprises.
Whether it is food barrier packaging, agricultural film, industrial packaging or special functional film production, Yuansu can provide corresponding equipment solutions with reliable performance, energy saving and high efficiency. With scientific investment return cycle and perfect after-sales service support, it is a cost-effective choice for film enterprises to expand production capacity and upgrade technology. Choosing Yuansu multi-layer co-extrusion film line means choosing a more efficient and higher quality production mode, which can help enterprises gain a competitive advantage in the increasingly fierce market competition and achieve sustainable development of performance and benefit.
