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Comparison of performance indexes of thermal insulation strips - part 2

Time : 2022-08-14 Hits : 2

At present, all the engineering plastic thermal insulation strips used in the domestic market come from abroad. We take the products of DIMEX company as an example, The performance indexes and test standards are shown in the following table: Table 2 unit value test standard of thermal insulation strip performance items of DIMEX 1 density g / cm3 1.3 soil 0.05 -- 2 Hardness HD 84 soil 2 -- 3 tensile strength n / mm2 ≥ 80 DIN 53455 4 fracture limit 96 3.5 ~ 8 DIN 53455 5 impact strength kJ / mm2 30 DIN 53453 6 bending strength n / mm2 ≥ 80 DIN 53457 7 7 thermal deformation temperature ℃ 244 Din 53461 8, melting temperature: 250 ℃, soil 5, DIN 52612 9, thermal expansion coefficient: k-1 3 × 10_ (5) DIN 52612 (10) tensile elastic modulus (n / mm2) ≥ 2900 (DIN 53455) 3.

Performance of engineering plastic heat insulation strip


In order to break the monopoly of foreign companies in the heat insulation strip Market, DIMEX has been committed to the development of engineering plastic heat insulation strips since May 2000. So far, most of the properties of the developed insulation strip materials have reached or exceeded the indicators of similar foreign products, and the production process has been thoroughly understood and familiar, and will soon enter the large-scale production stage. Table 3 shows the performance indexes and test standards of the engineering plastic insulation strips developed by Baiyun viscose factory. Table 3 characteristics of thermal insulation strip of Baiyun viscose factory unit value test standard: 1) density (g / cm3): 1.34 (gsl636); 2) hardness (hd): 85 (gb2411); 3) tensile strength (n / mm2): 118.9 (gbl040); 4) fracture limit: 96 (3.3) (gbl040); 5) impact strength (kJ / mm2): 58.4 (gb1043); 6) bending strength (n / mm2): 167.2 (gb9341); 7) thermal deformation temperature (℃): 246 (gbl634); 8) melting temperature (℃): 252 -- 9) thermal expansion coefficient (k-1); 5 × 10_ 5 gbl036

Problems in the domestic market due to the characteristics of polyamide such as easy water absorption, low melting viscosity and easy decomposition at high temperature, the processing technology is very exquisite. In addition, the price of polyboron is much higher than that of general plastics, so the heat insulation strip with the main component of polyvinyl chloride (PVC) appears in the market. As we all know, polyvinyl chloride is a general-purpose plastic, and its performance is very different from that of polyamide based engineering plastics. The insulation strips made of polyvinyl chloride are far inferior to polyamide insulation strips in strength, modulus or heat resistance. Some manufacturers of insulated doors and windows use polyvinyl chloride insulation strips because they do not understand the differences, which is very unfavorable to the quality of insulated doors and windows. 5. Future development trend flame retardant technology is a major feature of the current development in the field of tree materials. At present, the flame retardant performance of the engineering plastic insulation strips sold in the market has not reached a very ideal level, and further development is needed.

In addition, from the perspective of the relationship between the formulation and performance of materials, the addition of flame retardants in materials often leads to the decline of some properties of materials. Therefore, it is very important to find a balance between them. It is believed that there will be a breakthrough in this aspect in the near future.

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