Where is the best fire-resistant TPE for overmolding in Shanghai

In the elastomer industry, TPE usually refers to composite functional materials modified from SEBS.

Transparent TPE materials require high light transmittance, which necessarily demands strict surface quality of the material products. They must be free from any 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 given to TPE raw materials, equipment, molds, and even product design.

Transparent TPE, specifically, is a thermoplastic elastomer, while TPR is translated from English and strictly speaking is called thermoplastic rubber. That is the most basic difference. TPE is generally formed by modifying SEBS as the base material, while TPR is derived from SBS as the base material.

Fire-resistant TPE for overmolding

TPE elastomer soft gel has excellent comprehensive properties and is the most commonly used soft gel material for two-shot injection molding, overmolding, and dual-color injection molding.

PP overmolding is a plastic with very weak polarity, and its polarity is very close to that of TPE based on SEBS.

Transparent grades are divided into transparent and translucent series, each with a variety of softness/hardness; excellent transparency; smooth and soft surface; good yellowing resistance, tear resistance, good tensile strength; meets environmental requirements; suitable for various transparent series products.

SEBS is the product of SBS after hydrogenation. SEBS has a saturated molecular state structure, which leads to very different properties. It has the necessary aging resistance, yellowing resistance and other characteristics required for producing transparent TPE, and also contributes to excellent properties such as high temperature resistance and corrosion resistance. This is how transparent TPE is made.

Fire-resistant TPE for overmolding

Therefore, for overmolding PP, the most conventional TPE formulation can be used directly without adding additional polar modifiers.

TPE is used in overmolding, with TPE soft gel as the soft outer layer,

Styrenic transparent TPE is widely used in the footwear industry, having largely replaced rubber; at the same time, its use in industrial rubber products such as rubberized fabric and rubber sheet is also expanding.

Transparent TPE is used in stationery, sports equipment, etc. It has good UV resistance, chemical resistance, and is easy to color and process.

Fire-resistant TPE for overmolding

The common rigid materials used in combination are mainly plastics, as well as metals and fabrics. TPE overmolding with fabric is mainly used in luggage products. Like overmolding with metal, it is generally false overmolding. True overmolding is more common in two-shot injection molding and dual-color injection molding, where the main material of TPE overmolding is plastic.