Is Anhui two-color injection molding TPR cheap?

TPE material is used for overmolding, with TPE soft rubber as the outer coating layer.

Due to the high light transmittance required for TPE transparent materials, the surface quality of the product must be strictly controlled, with no defects such as streaks, pores, whitening, halo, black spots, discoloration, or poor gloss. Therefore, throughout the entire injection molding process, special attention and strict requirements must be placed on TPE raw materials, equipment, molds, and even product design.

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

Two-color injection molding TPR

Common hard materials used together are mainly plastics, but also metals and fabrics. TPE overmolding on fabrics is mainly used for luggage products, similar to metal overmolding, generally false overmolding.

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

Since any trace of impurities in TPE material can affect product transparency, special attention must be paid to sealing during storage, transportation, and feeding to ensure the TPE raw material is clean. In particular, moisture in TPE raw material can cause deterioration when heated, so it must be dried. During injection molding, a drying hopper must be used for feeding.

The thickness of the TPE/TPR overmolding layer. In most overmolding applications, a wall thickness range of 1.5-3.0mm ensures good adhesion. If the TPE layer is too thin, injection molding is difficult, adhesion strength is lower, and hand feel is poor. If the TPE layer is too thick, it increases cost and is prone to defects such as sink marks and bubbles.

Two-color injection molding TPR

Then, at the appropriate temperature, TPE soft rubber is injected and overmolded onto the hard plastic part, and after cooling, the product is obtained. The injection temperature for overmolding varies depending on the hard plastic material being overmolded.

TPE is used for overmolding, with TPE soft rubber as the outer coating layer,

Transparent TPE, specifically thermoplastic elastomer, while TPR is translated from English and strictly speaking is called thermoplastic rubber—this is the most basic difference. TPE is generally modified from SEBS base material, while TPR is modified from SBS base material.

Transparent grades include transparent and translucent series, each with various hardness levels; excellent transparency; smooth and soft surface; good anti-yellowing performance, tear resistance, good tensile strength; meets environmental requirements; suitable for various transparent series products.

Two-color injection molding TPR

Common hard materials used together are mainly plastics, but also metals and fabrics. TPE overmolding on fabrics is mainly used for luggage products, similar to metal overmolding, generally false overmolding. True overmolding is more common in two-shot injection molding and two-color injection molding, where the main substrate for TPE overmolding is plastic.