How to choose the right hardness when designing TPE products?

  • Time of issue:2021-09-01
  • Views:745

How to choose the right hardness when designing TPE products?

  • Categories:Elastomer knowledge
  • Author:SPP
  • Time of issue:2021-09-01
  • Views:745

TPE is used for encapsulation and shooting, and TPE soft rubber is used as the soft rubber outer coating. The common hard materials that match are mainly plastics, but also metals and woven fabrics. TPE and woven fabric shot bonding are mainly used in luggage products. Like metal encapsulation, they are generally fake encapsulation. Real encapsulation is more common in two-shot injection molding and two-color injection molding, that is, the main material of TPE encapsulation is plastic. TPE can be firmly bonded to some commonly used general plastics PP, GPPS, HIPS, ABS and engineering plastics PC, PC/ABS, PA and their modified materials.

  How to choose the hardness of TPE encapsulation? The hardness of TPE encapsulation and TPR encapsulation varies with the different substrates of the encapsulation and the requirements of physical properties. If it is PP package (TPE package PP, TPE package PP, TPR package PP), TPE, TPR is about 30-60A, while plastic polycarbonate (PC), nylon (PA6), ABS , The hardness will be higher. It also depends on the purpose of use. For example, the encapsulation of children's toothbrushes is relatively soft, bicycle grips, pen holders, golf club grips, and sports equipment grips are slightly taller, and screwdrivers with stronger force have relatively hard encapsulation, and Some metal-clad and rubber-coated stainless steel have a hardness of about 80A. At the same time, men exert more force than women, and adults are stronger than children, so the hardness is greater;

   The hardness of TPE is defined as the dent resistance of the material when a static load is applied. Hardness is also related to other important physical properties, such as tensile modulus and flexural modulus. Due to the various measurement scales and hardness, as well as the relationship with other material properties, confusion may arise when discussing hardness. When choosing a thermoplastic elastomer (TPE), the hardness of the material is often one of the first indicators that need to be considered. Thermoplastic elastomer (TPE) can produce standard products with hardness from Shore A0 (the softest) to Shore A95 (the hardest).

   TPE encapsulated elastomer soft rubber can be adjusted to the appropriate hardness (hardness range Shore 25-90A) and appropriate physical properties (such as abrasion and scratch resistance, adhesion, melt index, etc.) according to the physical requirements of the product. Provides a variety of possible material application solutions for different products.

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