How to choose Guangdong fireproof overmolding TPE

TPE is processed using overmolding injection technology,

Transparent TPE materials have different product properties when used in different applications. Thermoplastic elastomers, also called TPE materials, have not only the processing properties of thermoplastics but also the physical properties of vulcanized rubber, which is the advantageous combination of plastic and rubber. Transparent TPE is widely used in people's daily life and production.

SEBS is the product of hydrogenation of SBS. SEBS has a saturated molecular structure, which makes its characteristics quite different. It has the necessary aging resistance, yellowing resistance, and other properties required for producing transparent TPE, and also contributes to excellent high temperature resistance and corrosion resistance. Only then was transparent TPE produced.

Fireproof overmolding TPE

Common products such as handles, grips, electronic materials, etc. The material gives the product a comfortable touch, improves grip, enhances product aesthetics, and adds value.

TPE overmolding injection generally uses a two-shot injection molding process, where the injection-molded hard plastic part is fixed into the overmolding mold,

The transparent grade is divided into transparent and translucent series, each with multiple hardness levels; excellent transparency; smooth and soft surface; good yellowing resistance, tear resistance, tensile strength; meets environmental requirements; suitable for various transparent series products.

TPE high-transparency materials have different product properties in different applications. Thermoplastic elastomers, also called TPE materials, have not only the processing properties of thermoplastics but also the physical properties of vulcanized rubber. This is the advantageous combination of plastic and rubber. Transparent TPE is widely used in people's daily life and production.

Fireproof overmolding TPE

Then at a suitable temperature, the TPE soft rubber is injection overmolded onto the hard plastic part, and after cooling, the product is obtained. The injection temperature for overmolding depends on the hard plastic material being overmolded.

The temperature in the feeding zone should be set quite low to avoid clogging the feed port and to allow entrained air to escape.

TPE transparent materials require high light transmittance, which necessarily imposes strict surface quality requirements for the product. There must be no defects such as streaks, pores, whitening, halos, black spots, discoloration, poor gloss, etc. Therefore, throughout the injection molding process, great attention and strict or even special requirements must be imposed on the TPE raw material, equipment, mold, and even product design.

To prevent contamination of TPE raw materials and the presence of old material or impurities in the screw and accessory depressions, especially materials with poor thermal stability, all parts should be cleaned with screw cleaner before use and after shutdown to ensure no impurities adhere.

Fireproof overmolding TPE

To change the mixing state, the temperature of the transition zone should be set above the melting point of the masterbatch, so as to change the mixing state when using the masterbatch. The temperature near the nozzle should be set close to the required melting temperature.