The post-processing process of door and window tops includes cutting, coating and slitting. All equipments are designed in China, and its production technology, production efficiency and product quality have reached the level of similar products in the UK.
The finished products of excellent door and window tops should meet the requirements of the JC/T635-1996 industry standard issued by the State Building Materials Industry Bureau on May 9, 1996. This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of sealing tops for building doors and windows. Door and window top products are divided into three types: flat, flat and X-shaped. Each type is divided into ordinary density, medium density and high density according to the fluff density.
The standard specifies the basic size of the density top and the allowable deviation of the size. The standard strictly stipulates the materials used in the tops, which must be polypropylene special-shaped filaments, and must be treated with UV stabilization and siliconization. This ensures the quality of the sealing tops. The standard also stipulates the appearance quality of the sealing top: the fluff should be uniform and dense, the tufts should be straight, the cutting should be smooth, and there should be no lack of hair and unevenness; and other defects; the shortest segment of splicing shall not be shorter than 2m. 4 segments are allowed to be spliced every 50m; no oil stains or stolen goods are allowed.
The national standard stipulates various technical indicators of your sealing tops:
1. Air permeability: the air permeability of the flat type superior product is less than or equal to 1m3/m, h; the air permeability of the flat clip type is less than 0. 7m3/m.h; X-type air permeability is less than 2. 5m3/m,h.
2. Comprehensive mechanical health: after 20,000 times of positive pressure test, the height change is less than 0.5mm; after the pressure test is 2 times, the height
Post time: Mar-25-2022
