What is a heat shrinkable tube that heats the shrinkage of the tube? May be described directly as such, there is no comparability, it is difficult to speculate. Thermal shrinkage tube development so far, has penetrated into every aspect of life.

Plastics are widely used in people's daily life, in which polyethylene material is a set of ethylene monomer polymerization and linear molecules, the market can be seen everywhere, but they do not have thermal shrinkage performance, regardless of the membrane, or pipe in the store is what, the application is what.

A ray is usually an invisible light emitted by a substance in the event of microscopic changes. It has a wide range of applications in the military, health, science and industry, where only the use of rays to prepare a magical thermal shrinkage material is described.

The so-called thermal shrinkage material is that the material after heating is shrinkage deformation. When cold is a coarse tube, when heated can shrink into a thin tube, and close to the surface of the object on which it is attached, so as to ensure the insulation of the object or to ensure the corrosion of the metal surface. If the material is a film, with this packaging food, once heated that membrane material shrinkage tightly wrapped food, so that food air isolation, play a fresh role.

Why does this material have this magical characteristic? It is necessary to discuss it from the structure of the material.

Ordinary polyethylene tubes do not have thermal shrinkage. Polyethylene is composed of ethylene monomer, the molecular formula of ethylene monomer is H2C=CH2, under the polymerization condition, the double bond of each ethylene monomer molecule is opened, and the polyethylene of several molecular polymers is linear. The polyethylene plastic we usually see are formed by the accumulation of linear molecules polymerized by ethylene monomers.

Thermal shrinkage Tube But polyethylene plastic under the action of rays, linear molecules will produce chemical bonds, which is radiation crosslinking, the larger the radiation dose, the greater the crosslinking degree. The result of radiation crosslinking makes the polyethylene plastic from linear structure to mesh structure, that is, stereoscopic structure. The newly generated material has a wonderful "memory effect". For example, the pipe can be enlarged, and then cooled to form a coarse tube, the pipe can be heated to restore the pipe diameter of the tube before the size of the original pipe, so it is called "memory effect" material.

Thermal shrinkage polyethylene material prepared by the pipe, can be easily used to protect the cable, optical cable connectors, metal pipe rod protection and so on. Thermal shrinkage materials can not only be prepared as radial shrinkage of the heat shrinkable tube, but also can be prepared into a two-way shrinkage of the plastic film, it can be used in packaging, protection of goods and so on. Magic Thermal shrinkage materials, in the future will give people life and industrial and agricultural production to bring a wider range of applications.

High temperature heat shrinkable pipe, as the name implies, is a high temperature-resistant heat shrinkable tube, usually, our common heat shrinkable tube temperature resistance level between 105 degrees Celsius to 150 degrees Celsius, heat shrinkage industry to temperature greater than equal to 150 ℃ of high temperature heat shrinkable tube heat shrinkable tube Unified known as high-temperature heat shrinkable tube.

Generally speaking, high temperature heat shrinkable tube has the advantages of high temperature resistance, large mechanical strength, good chemical resistance and so on, high temperature heat shrinkable pipe is widely used in cable insulation protection, end or connection of insulation treatment or stress relief, wire processing cover and insulation protection, solder joint protection, electronic components coating, resistance, capacitance insulation protection, metal products anti-rust, Anti-corrosion treatment, wire marking or color marking, etc.

High temperature heat shrinkable tubes according to the temperature grade and the use of the environment can be divided into: 150 ℃ heat shrinkable tube, EPDM heat shrinkable tube, diesel heat shrinkable pipe, etc. 175 heat shrinkable tube, such as PVDF heat shrinkable tube, 200 ℃ heat shrinkable tube, such as silicone rubber, fluorine rubber heat shrinkable pipe, etc., 260 degree heat shrinkable pipe, currently for the heat shrinkage industry, the highest temperature-resistant heat shrinkable tube, That is, the Teflon heat shrinkable tube.

Temperature resistant 150 ℃ high temperature heat shrinkable tube:

It should be noted that the temperature of the high temperature heat shrinkable tube is the temperature of the casing working for a long time, rather than the transient temperature resistance. In fact, if only in the short term temporary high temperature resistance requirements, the ordinary 125 ℃ heat shrinkable tube can be satisfied, our common 125 ℃ heat shrinkable tube After testing, can be in 175 ℃ working environment temperature resistance up to 168 hours.

High temperature heat shrinkable tube with its excellent performance, not only as aerospace, cutting-edge technology, Military technology Department of Special materials used, but also used in various sectors of the national economy, its application scope has been extended to: metal smelting, construction, electrical and electronic, textile, automotive, machinery, chemical light industry, etc., with the production level of domestic silicone and other raw materials Will contain a huge space for development.

热缩管知识及高温热缩管的发展趋势

热缩管是什么，加热收缩的管子？可能直接这样描述，没有可比性，难以揣摩。热缩管发展至今，已经渗透到生活的方方面面。

塑料在人们日常生活中应用广泛，其中聚乙烯材料就是一种乙烯单体聚合而成线状分子的集合体，市场随处可见，但是它们不具有热收缩性能，它们不管膜、还是管材在商店里是什么样，应用时就是什么样。

射线通常是物质在发生微观变化时，发射出的一种看不见的光。它在军事、医疗卫生、科学及工农业各方面有着广泛的应用，在此仅阐述利用射线制备一种神奇的热收缩材料。

所谓热收缩材料就是该材料经加热以后即收缩变形。遇冷时是一个粗管，当加热以后可以收缩成细管，并紧贴在其附着的物体表面，从而可保证物体的绝缘或保证金属表面的防腐。如果材料是薄膜，用此包装食品，一经加热即膜材料收缩紧包住食品，使食品空气隔绝，起到保鲜作用。

为什么这种材料有这种神奇的特性呢？就要从材料的结构来讨论。

普通的聚乙烯管子并不具有热收缩性。聚乙烯是由乙烯单体聚合而成，乙烯单体分子式是H2C=CH2，在聚合条件下，每个乙烯单体分子的双键打开，若干个分子聚合成高分子的聚乙烯呈线性状。我们平时所看到的聚乙烯塑料就是由乙烯单体聚合的线性分子堆积在一起构成的。

热缩管　但是聚乙烯塑料在射线作用下，线性分子间就会产生化学键，这就是辐射交联，辐射剂量越大，交联度就愈大。辐射交联的结果使聚乙烯塑料由线状结构变成网状结构即立体结构。新生成的材料有奇妙的“记忆效应”。例如管材可扩粗，然后冷却定形成粗管，这种管子只要再受热即可恢复到扩管前塑料管的原管径大小，所以称它为“有记忆效应”的材料。

热收缩聚乙烯材料制备的管子，可以方便地使用来保护电缆、光缆的接头，金属管杆的保护等方面。热收缩材料不仅仅可制备成径向收缩的热缩管，同时还可制备成经纬双向收缩的塑料膜，它可用在包装，保护物品等方面。神奇的热收缩材料，今后将会给人们生活和工农业生产带来更广泛的应用。

高温热缩管,顾名思义，就是耐温等级较高的热缩管，通常情况下，我们常见的热缩管耐温等级在105摄氏度到150摄氏度之间，热缩行业中把耐温大于等于150℃的高温热缩管热缩管统一称为耐高温热缩管。

一般来说高温热缩管具有耐高温、机械强度大、耐化学性好等优点，高温热缩管广泛应用于线缆绝缘保护、端末或连接处的绝缘处理或应力解除，线材加工的被覆与绝缘保护，焊点保护、电子元器件的包覆，电阻、电容的绝缘保护，金属产品的防锈、防腐蚀处理，电线标示或标色等。

高温热缩管按温度等级和使用环境可分为:150℃热缩管，有EPDM热缩管，耐柴油热缩管等；175热缩管，如PVDF热缩管；200℃热缩管，如硅橡胶、氟橡胶热缩管等；260度热缩管，目前为热缩行业中耐温等级最高的热缩管，即Teflon热缩管。

耐温150℃高温热缩管：

需要注明的是，耐高温热缩管所讲的温度，是套管长期工作的温度，而不是短暂耐温温度。事实上如果只是短期内的临时耐高温要求，普通的125℃热缩管就可以满足，我们普通的125℃热缩管经过测试，可以在175℃工作环境中耐温长达168个小时。

高温热缩管以其优异的性能，不仅作为航空航天、尖端技术、军事技术部门的特种材料使用，而且也用于国民经济各部门，其应用范围已扩展到：金属冶炼，建筑、电子电气、纺织、汽车、机械、化工轻工等，随着国产有机硅等原料生产水平的提高，将蕴藏着巨大的发展空间。