What are the characteristics of the raw materials for insulation strips?
Firstly, it is internationally recognized that 75% polyamide 66 (PA66) and 25% glass fiber (GF) are the main raw materials for insulation strips, which is due to the excellent heat resistance and physical properties of PA66. The addition of 25% GF has made a qualitative leap in mechanical strength.
The insulation strip produced by adding 25% glass fiber nylon 66 to the insulation strip has reached a thermal deformation temperature of over 230 degrees, fully meeting the process requirements of threading before spraying;
The thermal conductivity (thermal conductivity) is 0.3W/m * K, which is only about 1% of aluminum alloy; The similar linear expansion coefficient of other aluminum alloys in the insulation strip can ensure that it can synchronize with the aluminum alloy during the process of external temperature changes; Excellent UV resistance and thermal aging performance can ensure its long-term service life.
In general, insulation strips made of PA66+GF25 as raw materials must meet the mechanical properties and processing characteristics of aluminum alloy profiles, ensure the quality and lifespan of insulation strips, and ensure the safe use of doors, windows, and curtain walls. However, some domestic enterprises now use recycled nylon as pure nylon, and even use PVC, ABS, and talcum powder to replace PA66+GF25. Such products not only fail to meet the performance requirements, but also fail to meet the requirements, Moreover, it may cause deformation, detachment, and falling of insulation strip doors and windows, which may flow into the market, not only harming the interests of users, but also failing to ensure their safety.