Mold knowledge

PBT

What is PBT? Polybutylene terephthalate, Abbr. PBT, falls into the polyester series. It is a milky white, translucent or opaque crystalline thermoplastic polyester resin polymerized from 1.4-pbt butylene glycol (1.4-butylene glycol) and purified terephthalic acid (PTA) or dimethyl terephthalate (DMT), before going through a mixing process. It is collectively referred to as thermoplastic polyester, or …

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PET

What is PET? Polyethylene terephthalate (PET) is also known as polyester. Currently, GF-PET is the most popular variant among the clients.The rheology of the molten state PET is very good, while pressure has a greater influence on its viscosity than temperature. Therefore, the former is mainly leveraged to change the fluidity of PET melt. 1. …

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PPS

I.What is PPS? As a new type of engineering plastic for injection molding, PPS (polyphenylene sulfide) is a white, highly crystalline polymer with a density of 1.34. PPS is a polymer with a thiophenyl group on the main chain of the molecule. Due to its structure that the benzene ring and the sulfur are alternately …

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HDPE

High density polyethylene (HDPE) is a highly crystalline non-polar thermoplastic resin that features a milky white appearance, with a certain degree of translucency in the thin section. It’s tasteless, odorless and non-toxic natural-colored columnar or oblate pellets with excellent hardness, tensile strength, creep / wear resistance and chemical stability. Physical & Chemical Properties The high …

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TPE

I. Definition of TPE Thermoplastic Elastomer, AKA TPE, refers to the high molecular material that has the properties of vulcanized rubber (that is, the properties of an elastomer) at normal temperatures, and is able to be plastically deformed at high temperatures. It is able to be made into products with plastic processing machines such as …

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PVC

A Brief Introduction to Injection Molding of PVC Definition: Polyvinyl chloride polymer, or PVC for short, is a thermoplastic resin polymerized by vinyl chloride monomer under the action of an initiator. It is also known as one the five general-purpose resins, while the others are PP, PE, ABS and PS. Molecular Formula: (CH2-CHCl) n. Thanks …

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POM

Development History  of POM 1. Around 1955, DuPont, the US obtained formaldehyde homopolymer from formaldehyde polymerization, i.e., POM-H, with the trade name of Delrin. 2. In 1960, Celanese Corporation in the US started from paraformaldehyde to produce a copolymer with a small amount of dioxolane or ethylene oxide, i.e., POM-C, with the trade name of …

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PC

Polycarbonate (Abbr. PC) is an engineering thermoplastic with an excellent performance, boasting outstanding resistance to impact and creep, as well as great dimensional stability, heat resistance, low water absorption, non-toxicity and excellent dielectric properties. Among the top 5 engineering plastics, it is the only one with great transparency, while also being the fastest growing general …

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PP

The Characteristics of PP   PP – Chemical Name: Polypropylene; Shrinkage Rate: 1.2-1.8%; Relative Density: 0.9-0.91 g/cm3,structrual formula: (C3H6)n The appearance of PP: White, translucent and waxy when uncolored; natural color, cylindrical and smooth pellets of 2-5mm in any direction; odorless, non-toxic, and no mechanical impurities  The applications of PP: Suitable for the production of general …

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PA(nylon)

Nylon (polyamide, abbr.as PA) refers to a injection molding plastic composed of polyamide resins, which can be obtained by polycondensation of diamines and dibasic acids, or by ring-opening polymerization of lactams formed by dehydration of amino acids. Different from PP, PE and PS, PA Nylon does not gradually soften with the rise of temperature, but …

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