How to choose Beijing two-color injection molding TPR

TPE elastomer soft rubber is used in secondary injection molding, overmolding.

Transparent TPE material has different product properties when applied in different aspects. Thermoplastic elastomer is also called TPE material. Transparent TPE not only has the processing properties of thermoplastic plastics, but also has the physical properties of vulcanized rubber. This is the so-called advantageous combination of plastic and rubber. Transparent TPE is widely used in people's life and production.

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

Because TPE material has good slip resistance and excellent elastic touch, it can improve the touch feel of products and enhance grip.

TPE overmolding generally uses a two-shot injection molding process, that is, fixing the injection-molded hard plastic part in the overmolding mold,

Transparent TPE is used in appliance shells, handles, grips, etc. It exhibits a very good hand feel, is non-slip and labor-saving, and is easy to color and process. It also has a wide design space.

The wall thickness of the TPE material 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 gas marks and bubbles.

Two-color injection molding TPR

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

For two-shot overmolding on nylon using a regular injection molding machine, it is recommended that before overmolding,

Transparent TPE, specifically, is a thermoplastic elastomer, while TPR is translated from English, strictly speaking it 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.

Olefin-based transparent TPE has good weather resistance and ozone resistance, so it is the fastest growing type of TPE, and it has become the main rubber material in fields such as automobiles and home appliances.

Two-color injection molding TPR

First, preheat and bake the nylon part, because nylon has strong water absorption, and overmolding requires a higher molding temperature; preheating before overmolding can remove moisture, facilitating rapid overmolding while hot.