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Common injection molding material properties

1、Polystyrene (PS). Commonly known as hard rubber, is a colorless, transparent, glossy granular polystyrene properties are as follows

a, good optical properties

b, excellent electrical properties

c, easy molding process

d. Good coloring properties

e. The biggest disadvantage is brittleness

f, heat-resistant temperature is low (maximum use temperature 60 ~ 80 degrees Celsius)

g, poor acid resistance

2、Polypropylene(PP). It is colorless and transparent or has a certain luster granular material, referred to as PP, commonly known as the soft rubber. It is a crystalline plastic. The properties of polypropylene are as follows.

 a. Good flowability and excellent molding performance.

 b. Excellent heat resistance, can be sterilized by boiling at 100 degrees Celsius

 c. High yield strength; good electrical properties

 d. Poor fire safety; poor weather resistance, sensitive to oxygen, susceptible to ultraviolet light and aging

3、Nylon(PA). Is an engineering plastic, is a plastic composed of polyamide resin, referred to as PA. there are PA6 PA66 PA610 PA1010, etc. The properties of nylon are as follows.

a, nylon has a high crystallinity, high mechanical strength, good toughness, high tensile, compressive strength

b, outstanding fatigue resistance, wear resistance, corrosion resistance, heat resistance, non-toxic, excellent electrical properties

c, poor light resistance, easy to absorb water, not acid-resistant

4、Polyformaldehyde (POM). Also known as the race steel material, is a kind of engineering plastic. The properties and uses of polyformaldehyde

a, paraformaldehyde has a highly crystalline structure, has excellent mechanical properties, high modulus of elasticity, rigidity and surface hardness is also very high, known as “metal competitor”

b. Small coefficient of friction, excellent wear resistance and self-lubrication, second only to nylon, but cheaper than nylon

c, good solvent resistance, especially organic solvents, but not strong acids, strong alkalis and oxidizers

d, good dimensional stability, can manufacture precision parts

e, molding shrinkage, thermal stability is poor, heating easy to decompose

5,Acrylonitrile-butadiene-styrene (ABS). ABS plastic is a high-strength modified polystyrene, composed of acrylonitrile, butadiene and styrene in a certain ratio of three compounds, with light ivory, opaque, non-toxic and tasteless.

Characteristics and Uses

a. High mechanical strength; strong impact resistance; good creep resistance; hard, tough, rigid, etc.

b、The surface of ABS plastic parts can be plated

c、ABS can be blended with other plastics and rubber to improve its performance, such as (ABS +PC)

6, Polycarbonate (PC). Commonly known as bulletproof glass, is a non-toxic, tasteless, odorless, transparent material, combustible, but can be self-extinguishing after leaving the fire. Characteristics and uses.

a. With special toughness and hardness, it has the best impact strength among all thermoplastic materials

b. Excellent creep resistance, good dimensional stability, high molding accuracy; good heat resistance (120 degrees)

c. The disadvantages are low fatigue strength, high internal stress, easy to crack, and poor wear resistance of plastic parts.

7、PC+ABS alloy (PC+ABS). Combined PC (engineering plastics) and ABS (general-purpose plastics) the advantages of both, improved the performance of both. Contains ABS and PC chemical composition, with ABS good fluidity and molding processability, PC impact resistance and resistance to hot and cold cycle changes. Features

a. Can be dispensed with glue mouth / large water mouth mold design.

b、Surface can be sprayed oil, plating, metal spray film.

c. Note the addition of surface exhaust.

d. The material is commonly used in hot runner molds and has been used in more and more consumer communication products, such as cell phone cases/computer cases.

Post time: Nov-29-2022