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Features of rubber sealing strip

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ADD:Yawo Village, Changzhuang Township, Wei County

TEL:+86-311-85851653

FAX:+86-319-3252989

E-mail:contact@fmseal.com

HEBEI FENGMING PLASTIC PRODUCTS CO., LTD.

Our company has accumulated rich experience and made outstanding achievements in the design and development of sealing strips for automobiles, high-speed rail, subways, containers, refrigerated trucks, ships, building doors and windows, industrial equipment, etc.

Features of rubber sealing strip

Source:
Release time:
2021/12/30
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[Abstract]:

Rubber sealing strips can be classified according to several methods such as cross-sectional shape, vulcanization method, use location and purpose, and use materials.

1. According to the vulcanization method

(1) Discontinuous vulcanization method (after cutting the extruded rubber strip to a certain length, put it into a vulcanizing tank for vulcanization, and put the semi-finished product of the extruded rubber strip into the model to vulcanize);

(2) Continuous vulcanization method (microwave continuous vulcanization method, salt bath continuous vulcanization method, hot air continuous vulcanization method, etc.).

A. Microwave continuous vulcanization composite sealing strip: Microwave vulcanization technology is a production technology that was applied and widely promoted after the foreign energy crisis in the 1970s. The use of microwave continuous vulcanization technology can not only produce composite strips made of metal core, solid rubber and sponge rubber, but also has advantages over other continuous vulcanization devices in terms of energy saving and improving work efficiency. This technology is recognized by the world as the best process method for producing extruded products. The characteristic of microwave heating is that the heat is directly generated in the object to be heated, instead of being input from the outside as usual. This not only generates heat quickly, but also distributes it uniformly, which is beneficial to improve product quality and greatly shorten the heating time.

B. Salt bath continuous vulcanization sealing strip: The salt bath vulcanization adopts a nitrite-containing salt bath system, which pollutes the environment and has been gradually eliminated. Vulcanization (Tmax: 450°C and Vmax: 60m/s) can also achieve the effect of flame pretreatment, and the safety is greatly improved.

2. Classification according to the material of rubber sealing strip

There are three types of rubber materials for automobile sealing strips: dense rubber, sponge rubber and hard rubber. The hardness of hard rubber can reach Shore A95. The rubber material of the sealing strip is mostly used for aging resistance, low temperature resistance, moisture resistance, chemical corrosion resistance, especially ethylene propylene diene monomer (EPDM) that is resistant to ozone aging. EPDM can be compounded with steel belt, steel wire braided belt, TPE, flannel, flocking, PU coating, organic silicon coating, etc., to ensure the waterproof, dustproof, sound insulation, heat insulation, vibration reduction, and anti- Grinding and decorative effects.

Under normal circumstances, EPDM sealing strips can be used stably for more than ten years. Chloroprene rubber (CR) with good ozone resistance and good aging resistance can also be selected.

Taking into account the process performance of commonly used rubber compounds, sometimes it is necessary to use combined rubber, such as natural rubber (NR) and CR and styrene butadiene rubber (SBR) combined use or polyethylene (PE), EPDM and NR rubber and plastic combined use type. Improve ozone resistance.

3. Classified by part of use

Automobile sealing strips, door and window sealing strips, ship sealing strips, and mechanical sealing strips; among them, mechanical sealing strips include cabinet sealing strips and container sealing strips.

4. according to the principle of classification

It consists of two parts: sealing and installation.

This type of product mainly uses the elasticity of the lip, cavity, flange and other parts of the body structure and the contact pressure generated on the surface of the assembled coupling parts (glass, metal parts, etc.) to play a sealing and decorative role. Generally used in the range of -50~70℃.