SEBS base TPE package adhesive
TPE, which is commonly referred to in the thermoplastic elastomer industry, refers to composite functional materials obtained by SEBS modification. TPE elastomer soft rubber has a comprehensive performance, is a secondary injection molding, coated adhesive molding, two-color injection molding often applied to soft rubber materials.
(1) The main advantages of TPE application to adhesive injection adhesion
1 TPE elastomer soft adhesive applied to secondary injection molding, including adhesive injection. Because TPE materials have good sliding properties and good elastic touch, it can enhance the touch feel of the product and enhance the grip.
2 TPE elastomer soft adhesive can be adjusted to the appropriate hardness(hardness range Shore 25-90A) according to the physical properties of the product, and suitable physical properties(such as abrasion resistance, scrapability, adhesion, melting index, etc.). Different kinds of material application plans are provided for different products.
3 TPE uses coated adhesive processing, commonly used products such as handles, grips, electronic materials and so on. The material gives the product a comfortable touch, improves the grip, enhances the product Peugeot and the product value. Most of the products are exported to the United States, Japan and the European Union and other developed countries and regions. Because TPE elastomer soft gum is a green and environmentally friendly raw material, the material does not contain phthalates, does not contain halogens, and does not contain 38 SVHC substances of high concern as prescribed by REACH. In line with the ROHS, REACH, NP, EN71, PAHS environmental inspection standards, it can completely meet the Environmental Protection requirements of the United States, Japan, the European Union and other developed countries and regions.
(II) Main mechanisms of adhesive injection and adhesion of TPE packages
The TPE bag adhesive adhesive has the distinction between real plastic and fake plastic. True adhesive is the use of soft glue and hard glue in softening the compatibility of melting(compatibility mainly depends on the melting parameter SP of the material, the closer the melting parameter is, the better the compatibility of the two materials. The knowledge of SP is detailed in polymer chemistry. knowledge), A layer of bonding layer is formed on the contact surface of hard glue and soft glue, which greatly improves the adhesive adhesion of TPE soft glue and hard plastic. Pseudo-coated glue is hardly involved in the compatibility of the two materials. The coating of the material is through mechanical force, through the design of molds and products and the appearance of cooking, through the role of hooping, so that soft glue and hard glue can be joined together.
(3) TPE package adhesive processing process
The TPE bag adhesive is generally used in the secondary injection molding process. Hard plastic parts that have been finished with beer(injection molding) are fixed on the adhesive mold, and TPE soft glue is injected into the hard adhesive at the appropriate temperature and cooled to obtain the product. The injection plastic temperature of the adhesive is different depending on the hard plastic material of the adhesive. Because the temperature should take into account the softening of both hard glue and TPE soft glue, the ability to promote the two materials to achieve a certain degree of compatibility at the contact surface. In order to achieve the effectiveness of true plastic, the injection temperature of TPE plastic PP material is usually about 170-190 degrees Celsius; The plastic ABS material is about 220-220 degrees Celsius; The temperature of the coated PC material is slightly higher than the injection temperature of the coated ABS; When coated with PA nylon, the injection temperature must reach about 240 degrees Celsius.
(IV) Common TPE package adhesive materials
TPE is applied to coated adhesive, TPE soft adhesive as a soft adhesive overlay, common hard materials for cooperation are mainly plastics, but also metals and weaving. TPE and woven adhesive are mainly used in package products. Like metal packaging, they are generally fake packaging. True plastic is more common in secondary injection molding and two-color injection molding, that is, the main material of TPE pack adhesive is plastic. TPE can bond firmly with some commonly used general plastics PP, GPPS, HIPS, ABS and engineering plastics PCs, PC/ABS, PA and its modified materials.
The adhesion of TPE and POM polyformaldehyde is still a problem in the elastomer industry. Because POM's melting parameter SP(22.6) is very different from TPE's SP(7.2-7 .6), the two materials are not compatible in themselves, and no suitable compatibility agent has been found to promote the good adhesion of the two.
The advantages of the plastic products introduced by the company are as follows:
1, a wide range of application areas, the main application areas include: automotive industry, industrial products, footwear, sports equipment, daily necessities, tool grips, toy dolls, medical care and polymer modification.
2, the product is resistant to wear, easy to form
3, feel good, easy to process, strong adhesion.
The TPE packaging products produced by Dechuang Chemical Co., Ltd. meet the human skin test test and will not produce allergies, mutations, and repulsion reactions to human tissues. They pass the FDA, REACH, Rohs and other environmental protection instruction standards.
