Advantages and disadvantages of ABS and HIPS in injection molding production

- Jul 31, 2019-

ABS Plastic

Chemical name: acrylonitrile-butadiene-styrene copolymer

English name: Acrylonitrile Butadiene Styrene

Specific gravity: 1.05 g / cm 3 Molding shrinkage: 0.4-0.7%

Molding temperature: 200-240 ° C Drying conditions: 80-90 ° C 2 hours

Features:

1. Good comprehensive performance, high impact strength, chemical stability and good electrical performance.

2, and 372 plexiglass has good weldability, made into two-color plastic parts, and can be chrome-plated and painted.

3, has high impact, high heat, flame retardant, enhanced, transparent and other levels.

4, the fluidity is a little worse than HIPS, better than PMMA, PC, etc., and good flexibility.

Uses: Suitable for making general mechanical parts, wear-resistant parts, transmission parts and telecommunications parts.

Molding Characteristics:

1. Amorphous material, medium fluidity, large moisture absorption, must be fully dry, the surface of the plastic parts requiring gloss must be preheated for a long time to dry 80-90 degrees, 3 hours.

2. It is advisable to take high material temperature and high mold temperature, but the material temperature is too high to be easily decomposed (decomposition temperature is >270 degrees). For high precision plastic parts, the mold temperature should be 50-60 degrees, high gloss. For thermoplastic parts, the mold temperature should be 60-80 degrees.

3. If you need to solve the water trap, you need to improve the fluidity of the material, adopt high material temperature, high mold temperature, or change the water level.

4. If the heat-resistant grade or flame-retardant grade material is formed, the plastic decomposition product will remain on the surface of the mold after 3-7 days of production, which will cause the surface of the mold to be bright. It is necessary to clean the mold in time, and the surface of the mold needs to increase the exhaust position.

High Impact Polystyrene Impact Resistant Polystyrene (HIPS) is an impact-resistant polystyrene product produced by the addition of polybutyl rubber particles to polystyrene. The product is flame retardant, natural color, impact strength is greatly improved, dyeing and processing properties are as excellent as general-purpose polystyrene, widely used in personal computer peripheral parts, TV casings, home appliances and toys.