Analysis of newest eva film extrusion line

Introduction

EVA is the English abbreviation of ethylene-vinyl acetate copolymer, which is a random copolymer composed of non-polar, crystalline ethylene monomer and strong polar, non-crystalline vinyl acetate monomer. China JWELL as manufacturer of eva film extrusion line, EVA solar cell adhesive film is used for solar cell encapsulation. After lamination and curing, it is bonded and sealed, which has high light transmittance to cell components, prevents water vapor penetration, high and low temperature resistance, and UV resistance. EVA material is ethylene-vinyl acetate copolymer. Generally, the content of vinyl acetate is between 5% and light to ensure the stable and efficient use of battery components. It is a durable and reliable packaging material.

Compared with polyethylene, the newest eva film extrusion line product has reduced high crystallinity, improved flexibility, impact resistance, filler compatibility and heat sealing performance due to the introduction of vinyl acetate monomer into the molecular chain. Widely used in foam shoe material, functional shed film, packaging film, hot melt adhesive, wire and cable and toys and other fields. Generally speaking, the performance of EVA resin mainly depends on the content of vinyl acetate on the molecular chain.

When the content of vinyl acetate in the EVA material is less than 20%, it can be used as a plastic at this time. EVA has good low temperature resistance, and its thermal decomposition temperature is low, about 230 ℃. With the increase of molecular weight, the softening point of EVA material increases, the processability and surface gloss of plastic parts decrease, but the strength increases. The impact toughness and environmental stress cracking resistance are improved. The chemical resistance and oil resistance of EVA material are slightly worse than that of PE and PVC, and the change is more obvious with the increase of vinyl acetate content.

Newest eva film extrusion line features:

1. China JWELL as manufacturer of eva film extrusion line, the extrusion part is designed as a large diameter single screw, and the screw barrel adopts the design of circulating water cooling, which can solve the problem of non-plasticization and non-crosslinking of EVA, and also ensure the product. of good quality.

2. The roller body adopts double-sided embossing, and solves the technical difficulty of sticking the film to the roller. At the same time, we can customize the embossing pattern according to the needs of customers, and can also provide customers with embossing patterns.

3. An important factor for the qualification of EVA film products is the cooling shrinkage rate after the film is made. The service life of EVA film is usually set to 15-25 years. Cooling rollers and stress-relieving cooling beds are used to make the film run smoothly and fully set to ensure that the shrinkage rate is less than 3%.

4. China JWELL as manufacturer of eva film extrusion line, the whole line of newest eva film extrusion line adopts PLC automatic control, integrated into HMI touch screen terminal, intelligent operation is very high and save labor cost.

5. The production line is equipped with an online quality monitoring and control system to ensure the qualified rate of products.

6. The micro-tension winder can make the line speed of the whole production line reach 18m/min, and can control the tension fluctuation of the take-up and take-up parts to a minimum without an energy storage device.

Newest eva film extrusion line product application scenarios:

(1) Transparent and white EVA film

China JWELL as supplier of eva film extrusion line, currently single-glass modules are usually packaged with conventional transparent EVA film and white film. Reflection of light and component transmitted light, thereby improving component efficiency by 1W-3W.

(2) POE film

The newest eva film extrusion line, double-glass modules and N-type cells, due to the serious PID attenuation problem, can replace the EVA resin with POE resin with better water resistance, weather resistance and transmittance, and the POE film was born.

Main application range of newest eva film extrusion line

1. Shoe material

The newest eva film extrusion line products are the most important application fields of EVA materials in my country. Because EVA resin blended foam products have the properties of softness, good elasticity and chemical corrosion resistance, they are widely used in the soles and interior materials of middle and high-end travel shoes, hiking shoes, slippers and sandals. In addition, this material is used in the fields of sound insulation boards, gymnastics mats and sealing materials.

2. Film

The main use of EVA film is to produce functional shed film. The shed film made of adding a certain amount of EVA resin not only has a higher light transmittance, but also has a great improvement in the anti-fog droplet performance, which generally lasts for more than 4 months. In addition, the newest eva film extrusion line product EVA can also be used to produce packaging film, medical film, lamination film, casting film and so on.

3. Wire and cable

With the continuous development of computer and network engineering, people use more and more halogen-free flame retardant cables and silane cross-linked cables for the safety of computer rooms. China JWELL is the supplier of eva film extrusion line. Because EVA resin has good filler inclusion and cross-linkability, it is widely used in halogen-free flame retardant cables, semiconductor shielded cables and two-step silane cross-linked cables.

4. Hot melt adhesive

newest eva film extrusion line The hot melt adhesive with EVA material as the main component, because it does not contain solvent, does not pollute the environment and has high safety, it is very suitable for automated assembly line production, so it is widely used in book binding, furniture edge banding , assembly of automobiles and household appliances, shoemaking, carpet coating and anti-corrosion coating of metals.

5. Toys

China JWELL as supplier of eva film extrusion line, EVA resin also has many applications in toys, such as children’s wheels, seat cushions, etc. my country’s toy processing industry has developed rapidly, and production is mostly concentrated in coastal Dongguan, Shenzhen, Shantou and other places, mainly for export and external processing.