Pair of plastic doors and windows sealed materials industry Analysis

In the past the process of using plastic doors and windows of poor quality due to low performance impact of the sealing material, its quality and service life has been greatly affected, there have been many quality problems, serious damage to the merchant's reputation. Especially with the windows and doors in the building works, ranging from hard brittle, loss of elasticity and sealing function, heavy sticky "permeability", lost the use of functions at the same time, contaminating the doors and windows, affecting the appearance of windows and doors.high security seal
Occurrence of this phenomenon was attributed to the enterprises to improve quality and performance of plastic doors and windows at the same time, ignoring the doors and windows accessories introduction and development leading to the development of sealing materials lagged far behind the development of plastic doors and windows. Gratifying is that the high-grade quality doors and windows accessories, especially the doors and windows sealed material is accepted by everyone, and gradually into the window market.
Plastic doors and windows sealing strip material status
Currently, foreign material that the sealing strips are NBR, EPDM (EPDM), thermoplastic elastomer (TPE), polyurethane elastomer (P), silicone rubber, etc., and excellent anti-aging properties to EPDM higher usage rate of 60% or more.
In recent years, sealing materials, doors and windows on the market, plasticized polyvinyl chloride material of the sealing strip more than 90% market share, and was recommended modification relevant industry a high degree of polymerization of PVC and thermoplastic elastomer seal Market share is very low, most concentrated in the Beijing surrounding areas.
EPDM rubber material in China in the 1960s by the Beijing Research Institute of Chemical Industry out, but its doors on the application and development only in the mid-1990s was only put on the agenda, and in 2000 by the Capital Aerospace Machinery Company Rubber & Plastics Factory developed out of the same year, the Ministry of Construction in late through the acceptance of relevant experts, now in mass production stage, but only some domestic manufacturers in the use of high-end doors and windows.
EPDM rubber seal domestic and foreign similar products, compared to approximately 40% below the market price, but still slow development, the reason is that the majority of users do not realize the doors and windows sealing strip making a smaller proportion of the total cost, considered only cost savings, without considering the use of high-quality sealing materials brought comprehensive benefits.tamper proof seals
Sealing strip sectional design and mold making process status
Domestic plastic doors and windows sealing strip due to late development, initially limited to the cross-sectional shape is relatively simple to use glass bead seal "K"-shaped bar, window frames (fan) and sealed with a tablespoon of yarn used in small fan "0 "strip, more single species. On the contrary, foreign sealing strip with plastic doors and windows development, its production has reached series, scale, each product section are designed to meet the functional requirements related to use, and the cooperation between the profiles corresponding almost to perfection.
In recent years, with the doors and windows making foreign technology introduction, domestic sealing strip cross-sectional shape and variety, great changes have taken place, but the domestic mold making process behind, as well as domestic peer-to-one as sealing windows and doors accessories pay enough attention to the material, resulting in production out of the product from the shape is very close to the shape of the design, the use of functions are still some defects, such as the large gap with the site, the finished lamination and bonding capacity of less than the amount of the relevant requirements, etc., so that in the course inevitably there will be some quality problems. In addition to this phenomenon by the above factors, but also by a greater extent the impact of the raw materials used, such as materials processing, expansion rate.
EPDM is a comprehensive performance is extremely excellent sealing materials, not only its excellent physical properties, and good processability huge expansion coefficient is small, this kind of sealing strip made of a material almost no difference between the design requirements large, which is developing rapidly in recent years, EPDM rubber is an important reason.