PVA film extrusion line

China Plastic Extruder Supplier – GWELL product PVA film extrusion line adopts blown film production process to continuously produce thermoplastic polyvinyl alcohol (PVA) water-soluble film. It has the characteristics of stable product performance and high production efficiency.

PVA film extrusion line

• PVA film extrusion line products are water-soluble and soluble in cold water. The water-soluble speed can be designed and selected, and it is non-toxic and non-polluting.
• Anti-static property, China GWELL water-soluble film is an anti-static film. Different from other plastic films, it has good anti-static property. In the process of packaging products with water-soluble film, the plasticity and static electricity will not be reduced due to static electricity. Dust attachment performance.
• Moisture and gas permeability. The water-soluble film has strong permeability to moisture and ammonia, but has good barrier properties to oxygen, nitrogen, hydrogen and carbon dioxide. These characteristics make it possible to keep the ingredients and original smell of the packaged products intact.
• Heat sealability The water-soluble packaging film has good heat sealability and is suitable for resistance heat sealing and high frequency heat sealing.
• Mechanical properties. Mechanical properties of water-soluble packaging film: strength modulus 2500-400kg/cm2, tearing force 200-50kg/cm2, elongation 150-220%.
• Oil resistance and chemical resistance Water-soluble packaging film has good oil resistance (vegetable oil, animal oil, mineral oil), fat, organic solvent and carbohydrates, etc.

PVA film extrusion line features:

• GWELL as China Plastic Extruder manufacturer, the screw is designed with a special mixing function and high plasticizing capacity.
• The hanger-type die adopts a special double-throttle design, which makes the thickness adjustment of the plate more accurate.
• Temperature control ± 1C can precisely control the plasticization process and the thickness and smoothness of the product.
• Three-roll calendar adopts horizontal, vertical, or 45-degree inclination type, which can be raised and lowered freely.
• The thickness of the sheet is controlled by screw adjustment and bidirectional adjustment of the pressure wheel to control the thickness of the sheet.

Features of China GWELL PVA film extrusion line:

• Smooth surface, no cracks, no bubbles, uniform color, heat resistance, cold resistance, aging resistance, heavy pressure resistance, strong acid and alkali resistance, good light transmission, and long service life. To a certain extent, it can be used as a substitute for glass, but its excellence is unmatched by glass. In particular, the impact resistance and tensile strength of soft glass not only ensure its long service life, but more importantly, it will not cause harm to the human body. It is warm in winter and cool in summer and soft in quality, making desktop office workers particularly comfortable work.
• Anti-light, not deformed, not broken, not hard, high elasticity.
• Soft texture, easy to write.
• China GWELL PVA film extrusion line products are heat-resistant to 100℃, resistant to -30℃, strong acid and alkali resistance, and heavy pressure resistance, which can help dry and improve the efficiency of surface work, reduce cleaning costs for dry restaurants, and add elegance to the restaurant.

PVA film extrusion line Product Flows

Extruder —- Screen changer —– Melt pump —– T-die —— Calender —– Thickness Scanner —-Cooling Bracket —-Cutting Knife —- Haul-off —-Winder

Polyvinyl alcohol (PVA) is a water-soluble polymer, which is characterized by good compactness, high crystallinity, strong adhesion, flexible and smooth film, oil resistance, solvent resistance, wear resistance, good gas permeability, and water resistance after special treatment. It is widely used.

Polyvinyl alcohol is non-toxic, tasteless, and harmless to the human body. It has a good affinity with the natural environment, with no accumulation, and no pollution.

Polyvinyl alcohol film is a green environmental protection functional material with polyvinyl alcohol as the main body, modifier, and other additives, which can be completely degraded by microorganisms in the soil after special processing. It can be degraded into carbon dioxide and water in a short time and can improve the land.

The biggest advantage of the polyvinyl alcohol film produced by China Plastic Extruder manufacturer is water solubility, and the biggest disadvantage is poor water resistance. The poor water resistance is due to the hydrophilic hydroxyl group (-OH) in its molecule. If the water resistance of the PVA film can be properly blocked and linked with water-resistant groups, the water resistance of the PVA film can be improved.
PVA contains hydroxyl groups, which can produce all typical reactions of polyols. With appropriate polycondensation, it can properly interact with the hydroxyl groups in PVA when the addition amount is small, so as to form a strong and tough three-dimensional structure of PVA, stabilize the airtightness of PVA under wet conditions and improve the water resistance.