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Homopolymer co-extrusion process high transparent PET plastic sheet rolls

Pulixin is an excellent and leading plastic sheet Manufacturer & factory in China. We have advanced technology and equipment, mature foreign trade and export experience, and have established good cooperative relations with customers in more than 60 countries. Free samples supply, OEM & ODM accepted

  • Brand: PULIXIN
  • Origin: Shanghai, China
  • MOQ: 5 tons
  • Thickness: 0.18~1.8mm
  • Width: 300~1400mm
  • Application: Thermoforming
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    Description of Homopolymer co-extrusion process high transparent PET plastic sheet rolls 

    Polyethylene terephthalate is the most important type of thermoplastic polyester. The English name is Polyethylene terephthalate, abbreviated as PET or PEIT (hereinafter referred to as PET), commonly known as polyester resin. The molar molecular weight of the repeating unit is 192g/mol. It is a condensation polymer of terephthalic acid and ethylene glycol. Together with PBT, it is collectively referred to as thermoplastic polyester, or saturated polyester. In 1946, the United Kingdom issued the first patent for preparing PET. In 1949, the British ICI formula completed the pilot test. However, after the United States DuPont purchased the patent, the production facility was established in 1953, the first in the world to realize industrialized production. In the early days, almost all PET was used for synthetic fibers (commonly known as polyester in our country, really good). Since the 1980s, PET has made breakthroughs in the development of engineering plastics. Nucleating agents and crystallization accelerators have been developed one after another. PET and PBT together as thermoplastic polyesters have become one of the five major engineering plastics.
    PET is divided into fiber-grade polyester chips and non-fiber-grade polyester chips. ① Fiber-grade polyester is used to make polyester staple fiber and polyester filament, and is the raw material for polyester fiber enterprises to process fibers and related products. Polyester is the most productive variety in chemical fiber. ②Non-fiber grade polyester is also used in bottles, films, etc., which are widely used in the packaging industry, electronic appliances, medical and health, construction, automotive and other fields. Among them, packaging is the largest non-fiber application market for polyester, and it is also the most growing PET market. Fast field.
    Advantages of PET as a packaging material:
    1. It has good mechanical properties, impact strength is 3 to 5 times that of other films, and good folding resistance.
    2. Resistance to oil, fat, dilute acid, dilute alkali, and most solvents.
    3. With excellent resistance to high and low temperatures, it can be used for a long time within the temperature range of 120°C, and can withstand high temperatures of 150°C and low temperatures of -70°C in short-term use, and has little effect on its mechanical properties at high and low temperatures.
    4. The gas and water vapor permeability is low, and it has excellent gas, water, oil and odor resistance.
    5. High transparency, can block ultraviolet rays, and good gloss.
    6. Non-toxic, tasteless, good hygiene and safety, and can be directly used for food packaging.

    Specification of Homopolymer co-extrusion process high transparent PET plastic sheet rolls 

    Product parameters

    Parameters of Homopolymer co-extrusion process high transparent PET plastic sheet rolls 

    PET is a milky white or light yellow highly crystalline polymer with a smooth and shiny surface. Creep resistance, fatigue resistance, abrasion resistance, good dimensional stability, low abrasion and high hardness, with the greatest toughness among thermoplastics: good electrical insulation, low temperature influence, but poor corona resistance. Non-toxic, weather resistance, good chemical resistance stability, low water absorption, resistance to weak acids and organic solvents, but not immersed in hot water and alkali. PET resin has high glass transition temperature, slow crystallization speed, long molding cycle, long molding cycle, large molding shrinkage, poor dimensional stability, crystallization molding is brittle, low heat resistance, etc. Through the improvement of nucleating agent and crystallization agent and glass fiber reinforcement,
    In addition to the properties of PBT, PET has the following characteristics:
    1. The heat distortion temperature and long-term use temperature are the highest among thermoplastic general engineering plastics;
    2. The bending strength is 200MPa, the elastic modulus reaches 4000MPa, the creep and fatigue resistance are also very good, the surface hardness is high, and the mechanical properties are similar to those of thermosetting plastics;
    3. Since the price of ethylene glycol used in the production of PET is almost half the price of butylene glycol used in the production of PBT, PET resin and reinforced PET are the lowest price among engineering plastics and have a high cost performance.

    The molding process of PET can be injection molding, extrusion, blow molding, coating, bonding, machining, electroplating, vacuum metal plating, and printing. The following mainly introduces two kinds.
    1. Injection molding level ① Temperature setting: Nozzle: 280~295℃, front section 270~275℃, middle forging section 265~275℃, rear section 250-270℃; screw speed 50~100rpm, mold temperature 30~85℃ , Amorphous mold is below 70℃, back pressure is 5-15KG. ②Try the desiccant dryer, the barrel temperature is 240~280℃, the injection pressure is 500~1400℃, the injection molding temperature is 260~280℃, the drying temperature is 120~140℃, and it takes 2~5 hours.
    2. For the film level, the PET resin chips are pre-dried to prevent hydrolysis, and then the amorphous thick flakes are extruded through a T-die in an extruder at 280°C, and then quenched by a cooling drum or coolant to keep them Amorphous shape for stretching orientation. The thick film is then biaxially stretched by the tenter to form a PET film. Longitudinal stretching is to preheat the thick sheet to 86~87℃, and stretch it about 3 times along the plane extension direction of the thick sheet at this temperature, so that its orientation can increase the crystallinity and reach a higher temperature: transverse stretching preheating temperature 98~100℃, stretching temperature 100~120℃, stretching ratio 2.5~4.0, heat setting temperature 230~240℃. The film after stretching in the vertical and horizontal directions needs to be heat-set to eliminate the film deformation caused by stretching and make a film with better thermal stability.

    Why Choose Pulixin

    PULIXIN is an excellent leading PP plastic sheet roll manufacturer in China. Our factory covers an area of ​​more than 10,000 square meters and has 4 rigid polypropylene sheet production lines with international advanced equipment. It can produce 3,000-5,000 tons of PP plastic sheets per month, and the maximum storage capacity exceeds 10,000 tons.
    High Level Factory
    high level factory
    1, 6000㎡ Area
    2, 10 co-extrusion lines
    3, 15 years experience
    4, 2300+ regular customers
    Considerate Service
    Considerate Service
    1, Quick reply to inquiries
    2, Free sample on paying the postage
    3, Strong capacity, short production and fast delivery
    4, Factory inspection acceptable
    5, OEM Support
    Strict Quality Control
    Strict Quality Control
    1, Thickness error:+-0.1mm
    2, Weight erroe:+-1kg
    3, Antistatic impedance: +-0.1Ω
    On Time Delivery
    On Time Delivery
    1, Production: 1days after prepayment
    2, Delivery: 5days after final payment

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