1. Overview of the sealing strip:

Sealing strips include doors and windows, ceilings, decoration, inlay, flocking, coating and other varieties, which are applied to various industries such as automobiles, doors and windows, machinery, containers, etc., so as to develop automobile sealing strips, door and window sealing strips, and mechanical sealing strips. Such as EPDM rubber, PTFE polytetrafluoroethylene, silica gel, rubber and plastic, PU, ​​butadiene rubber, etc., its advantages are wear resistance, good weather resistance, small friction coefficient, and relatively simple manufacturing process. There are many kinds of sealing strips with skeleton, such as steel strips, steel wire strips, and aluminum strips. Among them, the steel strips also include tensile steel strips, punching steel strips, and smooth strips. Secondly, the tensile steel belt is divided into symmetrical tensile steel belt and asymmetrical tensile steel belt. The main characteristics of its NBR are oil resistance and solvent resistance, but it is not resistant to ketones, esters and chlorinated hydrocarbons and other media, but its elasticity and mechanical properties are very good.

2. Type, structure and main material of automobile rubber sealing strip

1. Types of sealing strips: There are various types of sealing strips (seals), and the commonly used ones are as follows, such as: automobile sealing strips (doors and windows), glass running groove sealing strips, outer door sealing strips, radiator sealing strips, engine cover sealing strips, trunks Cover seals, gutters seals, interior trim seals.

2. Sealing strip structure:

a, pure rubber sponge foam sealing strip;

b. Composite rubber sealing strip;

c. Rubber and metal composite sealing strip;

d. Flocking or surface treatment sealing strip of installation surface;

e. Rubber and sponge foam rubber, metal multi-repeated sealing strip.

3. Main material of sealing strip:

a. Generally, EPDM rubber strips are used;

b, and plastic sealing strips

C, followed by thermoplastic elastomer seal

3. Performance requirements of automotive seals:

1. Conventional properties: such as hardness, breaking strength, elongation at break, compression set, ozone aging resistance, atmospheric aging resistance, and paint contact and interpenetration resistance.

2. Finished product performance: including the extrusion force, insertion and pull-out force before and after the door frame is closed, the wear resistance of the flocking surface, and the wear resistance of the sealing strip coating. Its function is required to mainly fill in various intervals and gaps of auto parts, with functions such as shock absorption, waterproof, dustproof, sound insulation, decoration, etc., to improve the comfort of driving experience and protect the car body.