How to choose TPE material for bracelet wholesale in Zhejiang

TPE material is used in overmolding injection bonding, with TPE soft rubber as the outer soft coating layer.

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

Olefinic transparent TPE has good weather resistance and ozone resistance, making it the fastest-growing variety of TPE. It is mainly used as a key rubber material in fields such as automotive and home appliances.

TPE material for bracelet wholesale

Common hard materials for bonding are mainly plastics, but also metals and fabrics. TPE injection bonding with fabric is mainly used in luggage and bag products, which, like metal overmolding, is generally false overmolding.

Overmolding of POM over POM. Although POM has a low melting point of only 180°C.

SEBS is the product of hydrogenation of SBS. SEBS has a saturated molecular structure, which gives it very different characteristics. It possesses the necessary aging resistance, yellowing resistance, and other properties required for producing transparent TPE, and also promotes excellent traits such as high temperature resistance and corrosion resistance. It is from this that transparent TPE is manufactured.

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

TPE material for bracelet wholesale

However, due to its high crystallinity, forming a fusion layer on the covered surface requires higher energy. At the same time, the self-lubricating property of POM is not conducive to rapid coverage of the TPE material on the POM hard plastic surface.

During the molding process of TPE material, during the filling of the mold cavity,

Transparent TPE is used in home appliance shells, handles, grips, etc. It exhibits very good hand feel, is anti-slip and labor-saving, and has the characteristics of easy coloring and processing. It also offers a wide design space.

Thickness of the TPE/TPR overmolding layer. In most overmolding applications, a wall thickness range of 1.5-3.0 mm ensures good adhesion. If the TPE layer is too thin, injection is difficult, adhesion strength is low, and hand feel is poor. If the TPE layer is too thick, cost is higher on one hand, and defects such as sink marks and bubbles are likely on the other.

TPE material for bracelet wholesale

If the filling performance of the product is poor, there will be excessive pressure drop, overlong filling time, inadequate filling, etc., leading to quality problems in the product.