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The most popular mobile phone case material -- TPU

The most popular mobile phone case material -- TPU
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  • Categories:Industry news
  • Author:
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  • Time of issue:2021-03-29 09:55
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(Summary description)

The most popular mobile phone case material -- TPU
Top

(Summary description)

  • Categories:Industry news
  • Author:
  • Origin:
  • Time of issue:2021-03-29 09:55
  • Views:
Information

With the popularity of smart phones, more and more consumers have their own mobile phones. In order to prevent the damage caused by some accidents, such as collisions and bumps, the mobile phone case seems to have become an essential product to protect mobile phones. The booming development of smart phones drives the development of the whole industry chain. Protective cases develop with the development of smart phones. In order to meet the needs of users, major manufacturers produce a large number of mobile phone protective cases. Material is one of the most important factors that affect the selection of protective shell, and its physical and chemical properties greatly affect the use experience.

 

The mainstream materials on the market are silica gel, PC and TPU.

 


As an elastomer, TPU is a kind of material between rubber and plastic. It is resistant to oil, water and mildew. TPU products have outstanding bearing capacity, impact resistance and shock absorption performance.  

 

I. The meaning of TPU

 

TPU是Thermoplastic Urethane热塑性聚氨酯弹性体的简称,所谓弹性体是指玻璃化温度低于室温度,断裂伸长率>50%,外力撤除后复原性比较好的高分子材料。聚氨酯弹性体是弹性体中比较特殊的一大类,聚氨酯弹性体的硬度范围很宽,性能范围很宽,所以聚氨酯弹性体是介于橡胶和塑料的一类高分子材料。可加热塑化,化学结构上没有或很少交联,其分子基本是线性的,然而却存在一定的物理交联。这类聚氨酯称为TPU 。

 

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所谓物理交换的概念,在1958年由SchollenbergeC.S.首先提出,是指在线性聚氨酯分子链之间,存在着遇热或溶剂呈可逆性的“连接点”,它实际上不是化学交联,但起化学交联的作用。由于这种物理交联的作用,聚氨酯形成了多相形态结构理论,聚氨酯的氢键对其形态起了强化作用,并使其耐受更高的湿度。

 

二、TPU的分类

 

 

According to different classification standards, TPU can be classified into many different categories.

For example, according to the soft segment structure can be divided into polyester type, polyether type and butadiene type, which respectively contain ester group, ether group or butenyl group. According to the hard segment structure, they can be divided into aminoester type and aminoester urea type, which are obtained by diol chain extender or diamine chain extender, respectively. The common division is generally divided into polyester type and polyether type. It can be divided into pure thermoplasticity and semi-thermoplasticity according to whether there is crosslinking. The former is a pure linear structure without crosslinking. The latter contains a small amount of urea-formate and other cross-linked bonds. According to the use of manufactured products can be divided into special-shaped parts (various mechanical parts), pipe (sheath, bar profiles) and film (thin, thin) and adhesives, coatings and fibers.

 

 

 

2.The advantages of TPU

 

(1) wear resistance TPU soft and hard characteristics between rubber and plastic, TPU hardness range is quite wide, by changing the ratio of each reaction component of TPU, can get different hardness of products, and with the increase of hardness, the product still maintain good elasticity and wear resistance. Well-known wear resistance, tear resistance, flexion strength are excellent; High tensile strength, high elongation, and low permanent deformation rate of long-term compression are the obvious advantages of TPU.

 

 

 

 

(2) Transparency

TPU is the main material for making clean water jacket. Viewed from the outside, TPU can be made very transparent. Silicone can't. It is precisely because of the transparent feeling of TPU that it is now more popular with users. And the TPU products of a lot of high-grade, more selective, pattern changes than silicone is more.

 

 

 

END ~

 


 

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