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PET (polyethylene terephthalate) is a versatile thermoplastic known for its clarity, strength and barrier properties. It provides good tensile strength, impact resistance and clarity. PET is commonly used in packaging applications such as food trays, blister packs and thermoformed containers.
EVOH (Ethylene Vinyl Alcohol) is a gas barrier material with excellent gas barrier properties, especially for oxygen and other gases. Efficiently prevent oxygen penetration and maintain the freshness and shelf life of packaged products. EVOH is commonly used in food packaging applications where oxygen sensitive products need to be protected.
PE (Polyethylene) is a flexible and durable thermoplastic known for its chemical resistance and low moisture absorption. It contributes to the flexibility and impact resistance of the composite sheet. PE is often used as a sealing layer in packaging to provide a reliable seal and protect the contents from moisture and external contaminants.
By combining these layers into a composite sheet, PET EVOH PE plastic sheet rolls have the following advantages:
1. The barrier performance of PET EVOH PE Plastic Sheet Roll is the excellent oxygen and gas barrier performance provided by the EVOH layer, which ensures that the product remains fresh and extends its shelf life.
2. The strength and durability of PET EVOH PE Plastic Sheet Roll is provided by PET and PE layers, both PET and PE have good durability, making it less prone to breakage and damage.
3. The flexibility of PET EVOH PE Plastic Sheet Roll is due to the presence of the PE layer that increases the flexibility of the sheet, enabling it to adapt to various shapes and contours during the packaging process.
4. The chemical resistance of PET EVOH PE Plastic Sheet Roll is provided by the PE layer to protect the contents from potential interaction with external substances.
5. The versatility of PET EVOH PE Plastic Sheet Roll is made of PET EVOH PE plastic roll which is easy to process, thermoform and seal, suitable for various packaging applications.
These PET EVOH PE Plastic Sheet Roll are commonly used in the food industry to package perishable products such as meat, cheese, snacks and processed foods where oxygen and moisture barrier properties are critical. They help maintain product freshness, extend shelf life and ensure product integrity.
The process of manufacturing PET EVOH PE plastic sheet rolls involves several steps. Here’s a general overview of the process:
1. Material preparation: Raw materials are selected according to the desired properties of the final board, including PET, EVOH and PE. These materials can be in the form of particles or resins.
2. Extrusion: The extrusion process begins with melting and mixing raw materials. They are fed into an extruder where they are heated and melted. The molten polymer mixture is then forced through a die, forming the material into a continuous sheet of the desired thickness.
3. Co-extrusion: For PET EVOH PE plastic sheet rolls, co-extrusion is usually used. Coextrusion involves extruding multiple layers of different materials at the same time. In this process, layers of PET, EVOH and PE are extruded together, with each layer controlled independently.
4. Cooling and solidification: After the multi-layer sheet is extruded, it passes through a cooling system, such as a water bath or a cooling roller, to rapidly cool and solidify the material. This step ensures that the paper retains its shape and size.
5. Sheet Forming and Winding: The cured sheet is then guided through rollers or other forming mechanisms to achieve the desired width and thickness. The sheet is then wound onto jumbo rolls to form a continuous roll of PET EVOH PE plastic sheet.
6. Quality Control: Throughout the manufacturing process, quality control measures are implemented to ensure that the panels meet the required specifications. This may include visual inspection, thickness and dimensional measurements, and barrier performance testing.
7. Cutting and Packaging: Once the PET EVOH PE plastic sheet rolls are manufactured, the sheets or rolls are then packaged and ready for distribution.