A brief discussion on the importance of EPDM rubber strips in door and window systems

First of all, the importance of materials

Most energy-saving doors and windows are now made of EPDM rubber strips.It is a copolymer of ethylene, propylene and a small amount of third monomer.Synchronized with doors and windows), heat-resistant aging, high and low temperature resistance, ozone resistance, chemical resistance, water resistance, good electrical insulation and elasticity and other physical and mechanical properties.Also known as crack-free rubber, it is recognized as the best material for the production of sealing products in the world.The main physical properties and technical parameters are as follows：

Now the market is still filled with a large number of counterfeit EPDM rubber strips, and some manufacturers even make such slogans: How much money can customers spend to produce what grade of sealing strips.There are a few yuan per kilogram of EPDM seals, but as a product of EPDM seals, a small amount of EPDM rubber is added to the production.As we all know, the important thing about EPDM rubber strips is the formula.If the formula does not meet the requirements, the physical properties will not be guaranteed. Its superior performance can only be an empty word. A few yuan or more than ten yuan will not meet the requirements. In terms of formula cost, there is no superior performance and it cannot meet the requirements of doors and windows.The expected requirements of the system cannot guarantee the three-character standards and energy-saving standards for doors and windows, and cannot meet the qualified energy-saving doors and windows.

The second is the importance of design ability.

It is very important to adjust the formula of EPDM rubber strips qualitatively and quantitatively and design the mold according to the physical properties of the formula (such as hardness and pressure change rate).Make good use of advantages, such as designing isobaric seals, first measure the profile and sample window, understand the system structure of the profile and the degree of cooperation between the profile and the hardware, and measure the measured values.If it is necessary to make up for the defects that match the profile and the hardware, the value of making up for the defects will be considered in the design quantity, and then the design will be optimized according to the physical properties of the rubber material, and the design will be optimized in non-critical locations, which can reduce the weight of the instrument, so as to achieve the purpose of reducing customer costs.Many manufacturers with weak design capabilities do not understand the system, blindly imitate, and do not consider the matching amount of profiles and hardware. The designed EPDM rubber strip cannot be completed, but it has caused huge economic and reputation losses to the manufacturer.

Third, the importance of dimensional tolerance

Adjusting the formula and designing well is only the basic beginning of ensuring product quality. The control of dimensional tolerance is an important standard to measure the high and low production technical capabilities of a manufacturer. Generally, the difference in size cannot be felt with the naked eye and the feel of each batch of qualified finished products.