What are the common problems of TPE coated ABS material

Do you know the common problems of TPE coated ABS material?
TPE is an elastomer material modified by SEBS. TPE has the characteristics of plastic and rubber and adjustable hardness and physical properties. It can be directly processed by injection molding. By adjusting the formula,
TPE can be bonded with various plastics (PP,PS,ABS,AS,PC,PC/ABS,PA, etc.).

Selection of ABS Hardness for TPE Encapsulation: Basic Characteristic Hardness of TPE for Encapsulation: Different product applications have different requirements on material hardness. Considering the adhesion between TPE and ABS and the tactility of the material, the hardness range of TPE material used for encapsulating ABS plastic is generally between Shore 30 and 90A.

Application of TPE Encapsulated ABS:
TPE Encapsulation ABS Material Application Field TPE Encapsulation on ABS Plastic Surface Mainly Improves Soft Touch, Anti-skid and Comfortable Holding Experience for Consumers. Therefore, it is mostly applied to various handles and handlebars. For example, five gold tool handles, electric drill handles for electric tools, handles for luggage and sports equipment, daily combs, brush handles, and some electronic and electrical materials, communication equipment accessories, etc

TPE Encapsulation ABS Encapsulation Principle:
TPE encapsulated ABS means that during the injection molding process, ABS plastic is injected first, then the processed ABS products are put into another set of molds, and TPE elastomer materials are injected onto the surface of ABS products. This process is generally completed in two injection molding machines, of which the mold for injecting soft TPE is called encapsulated mold. At present, more advanced two-color and multi-color injection molding machines have been mature and applied, which is suitable for the situation that products need multiple materials for compound injection molding. Compared with traditional rubber-coated secondary injection molding, two-color injection molding shortens the injection molding processing time.

TPE Encapsulated ABS Common Materials:
ABS is one of the most commonly used rubber coating materials for TPE. Other plastics that can be coated with TPE include AS, PA6, PA66, PBT, PC, PC/ABS, PE, PP, PS, etc

TPE Encapsulation ABS Encapsulation Precautions:

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1. Formula of 1.TPE. The formula of TPE must contain components that are compatible or sticky with ABS, that is, not every brand of TPE coated with ABS can be used.

2.TPE secondary injection molding processing temperature. The injection molding temperature must ensure that the material is fully plasticized to achieve the fluidity required for injection molding, and at the same time, the activity of ABS compatilizer in TPE formula is increased, so that the TPE and ABS can penetrate each other at the encapsulation contact interface within a few tens of seconds, and the TPE and ABS can be firmly bonded.

3. ABS material is weak to medium polarity plastic, which has a certain polarity difference with TPE. By adding modifier (TPU) into the formula, the polarity of TPE can be improved, thus improving the adhesion between TPE, ABS and PC. In addition, the secondary injection temperature is recommended to be 180~230℃. The specific adjustment can be made according to the actual processing conditions.