How to choose a TPR material supplier in Zhejiang

TPE uses overmolding injection processing,

Due to the high light transmittance required for TPE transparent materials, the surface quality of the material products must be strictly controlled, without any defects such as streaks, pores, whitening, halo, black spots, discoloration, or poor gloss. Therefore, throughout the entire injection molding process, strict and even special requirements must be paid attention to for TPE raw materials, equipment, molds, and even product design.

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

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

TPE uses overmolding injection processing, common products such as handles, grips, electronic materials, etc.

The thickness of the TPE, TPR overmolding layer. In most overmolding applications, a wall thickness range of 1.5-3.0mm will ensure good adhesion. If the TPE layer is too thin, injection molding is difficult, adhesion strength is low, and the hand feel is poor. If the TPE layer is too thick, on one hand the cost is high, and on the other hand, defects such as shrinkage and bubbles are prone to occur.

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

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The material gives the product a comfortable touch, improves grip, enhances product aesthetics and added value. Most products are exported to developed countries and regions such as the United States, Japan, and the European Union.

TPE is used in overmolding injection, with TPE soft rubber as the outer covering layer,

The wall thickness of the TPE layer should be as uniform as possible to achieve the best molding cycle. The transition between different wall thicknesses should be gradual to reduce problems caused by fluid flow, such as air marks and bubbles.

To achieve the matte appearance typical of thermoset rubber, a rougher mold surface is required. Generally speaking, the rough surface produced by electrical discharge machining (EDM) of the mold cavity will result in an excellent workpiece appearance and make demolding relatively easy. Abrasive methods such as steam blasting, sandblasting, or shot blasting, as well as chemical etching, can also be used to produce surfaces with different gloss and appearance.

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Common rigid materials used for bonding are mainly plastics, also metals and fabrics. TPE overmolding with fabric is mainly used in luggage products. Similar to overmolding with metal, these are generally false overmolding. True overmolding is more common in two-shot injection and bi-color injection molding, where the main material for TPE overmolding is plastic.