PET sandwiches an additional polyvinyl alcohol (PVOH) or polyamide (PA) layer to further reduce its oxygen permeability. For beverages that are degraded by oxygen, such as beer, a multilayer structure is used. Plastic bottles made from PET are widely used for soft drinks, both still and sparkling.

Polyester fibres are used in fashion apparel often blended with cotton, as heat insulation layers in thermal wear, sportswear and workwear and automotive upholstery. As of 2022, there are many brands around the world, mostly Asian. It was first commercialized in the 1940s by ICI, under the brand 'Terylene'. The invention of the polyester fibre is attributed to J. Polyester fibres are widely used in the textile industry. Polymerization is through a polycondensation reaction of the monomers (done immediately after esterification/transesterification) with water as the byproduct. One process for making PET uses bis(2-hydroxyethyl) terephthalate, which can be synthesized by the esterification reaction between terephthalic acid and ethylene glycol with water as a byproduct (this is also known as a condensation reaction), or by transesterification reaction between ethylene glycol and dimethyl terephthalate (DMT) with methanol as a byproduct. The semicrystalline material might appear transparent (particle size less than 500 nm) or opaque and white (particle size up to a few micrometers) depending on its crystal structure and particle size. The National Association for PET Container Resources (NAPCOR) defines PET as: 'Polyethylene terephthalate items referenced are derived from terephthalic acid (or dimethyl terephthalate) and mono ethylene glycol, wherein the sum of terephthalic acid (or dimethyl terephthalate) and mono ethylene glycol reacted constitutes at least 90 percent of the mass of monomer reacted to form the polymer, and must exhibit a melting peak temperature between 225 ☌ and 255 ☌, as identified during the second thermal scan in procedure 10.1 in ASTM D3418, when heating the sample at a rate of 10 ☌/minute.' ĭepending on its processing and thermal history, polyethylene terephthalate may exist both as an amorphous (transparent) and as a semi-crystalline polymer.

PET is commonly recycled, and has the digit 1 (♳) as its resin identification code (RIC).

PET consists of repeating (C 10H 8O 4) units. Polyester makes up about 18% of world polymer production and is the fourth-most-produced polymer after polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC). In the context of textile applications, PET is referred to by its common name, polyester, whereas the acronym PET is generally used in relation to packaging. The biggest application is in fibres (in excess of 60%), with bottle production accounting for about 30% of global demand. In 2016, annual production of PET was 56 million tons. Our PET preform injection molding machine is suitable for forming preforms of mineral water, carbonated drinks, fruit juices, edible oil, medicine cans and lotions, cosmetic packaging containers and other product preforms.Polyethylene terephthalate (or poly(ethylene terephthalate), PET, PETE, or the obsolete PETP or PET-P), is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and foods, and thermoforming for manufacturing, and in combination with glass fibre for engineering resins. We go through all the factors like: raw PET dehumidification, additive color mixing, production capacity, stable running, even connect with the blow mold machine or other next step, then NPC will provide you the professional turnkey solutions meet with your budget and request. We design the Pet preform injection molding machines aim at preforms or other PET products, offering an optional choices. NPC Precision Machinery has rich experiences in various types of PET preforms manufacturing process technology. Various types of pet preform including pet bottle preforms, hot fill bottle preforms, wide mouth jar preforms and 3-5 gallon bottle preforms. PET plastic injection molding machine is special designed and manufactured according to PET material moulding technologies, such as the special design of the screw and barrel, precision controller of the heating of the barrel, tie-bar space, nozzl, ejecting system, enlarged motor and oil pump, etc.

Preform injection moulding machine