How is Beijing thermoplastic elastomer?

TPE elastomer soft gel is used in overmolding and encapsulation injection bonding.

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

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

Thermoplastic elastomer

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

In TPE encapsulation (overmolding) forming, the key point is to achieve good encapsulation and adhesion between TPE and the substrate materials such as PP, ABS, PC, PA. To ensure good adhesion between TPE and the substrate,

Olefin-based transparent TPE has good weather resistance and ozone resistance, so it is called the fastest growing variety of TPE, and it is mainly used as a major rubber material in fields such as automotive and home appliances.

TPE is a classic aggregation-induced emission molecule, meaning it has no fluorescence in solution but exhibits strong fluorescence in solid state. Therefore, transparent TPE materials also have important applications in organic optoelectronics and other fields.

Thermoplastic elastomer

According to the principle of like dissolves like in chemistry, the key is that TPE and the substrate must have similar polarity, so that TPE and the substrate can undergo molecular chain level fusion.

The overmolding temperature is generally controlled at 30-50°C, but for some TPE grades with strong crystallinity,

The thickness of the TPE/TPR encapsulation 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 tactile feel is poor. If the TPE layer is too thick, on the one hand the cost is high, and on the other hand, defects such as sink marks and bubbles are prone to occur.

Since any impurity in the TPE material may affect the transparency of the product, attention must be paid to sealing during storage, transportation, and feeding to ensure the TPE raw material is clean. Especially if the TPE raw material contains moisture, it will cause degradation when heated, so it must be dried. During injection molding, a dry hopper must be used for feeding.

Thermoplastic elastomer

The mold temperature can be appropriately raised to 70°C, which is beneficial for bonding and also results in a more glossy encapsulated surface.