High-temperature-resisting micro-pore thin film material and production technology thereof

Abstract

The invention discloses a high-temperature-resisting micro-pore thin film material and a production technology thereof. The high-temperature-resisting micro-pore thin film material is prepared from the following raw materials in percentage by weight: 50 to 60 percent of paraffin wax oil, 15 to 25 percent of polypropylene, 10 to 20 percent of polyethylene, 5 to 9 percent of a modified additive auxiliary agent and 3 to 7 percent of benzoyl peroxide, wherein the modified additive auxiliary agent is prepared from the following raw materials in percentage by weight: 35 to 65 percent of ethanol, 10to 20 percent of triphosphite, 5 to 15 percent of 2,6-di-tert-butyl-p-cresol, 10 to 20 percent of phosphate and 5 to 15 percent of melamine. According to the high-temperature-resisting micro-pore thinfilm material, the high-temperature-resisting capability of a product can be improved in a cooling process of extruding and molding treatment; the phosphate in the modified additive auxiliary agent is used for enabling the product to have a flame-retarding effect; the triphosphite and the 2,6-di-tert-butyl-p-cresol in the modified additive auxiliary agent have a common effect so that the anti-oxidization performance of the product can be improved; then a micro-pore structure of the product can be stabilized according to biaxial stretching treatment-solvent extraction treatment-slitting and shaping treatment and the product has a uniform pore diameter and better air permeability and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of microporous film materials, in particular to a high temperature resistant microporous film material and a production process thereof. Background technique [0002] Microporous film material is a kind of porous film material with a pore diameter between 5.0nm and 1.0mm. While maintaining the circulation of water vapor, it can filter all dust particles including germs to achieve the effect of purification and ventilation, and is widely used in the fields of pharmaceuticals, biochemistry, microelectronics and laboratory consumables. [0003] However, in the existing microporous film materials, the overall shrinkage is often caused by the high working temperature, the high temperature resistance is weak, and it does not have the effect of flame retardancy. It is easily affected by the temperature and spontaneous combustion occurs, which in turn causes In dangerous situations such as fire, and under long-term...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a high temperature resistant microporous film material and its production process. By adopting the roller cooling method in which the cooling medium is air, and the cooling rate is controlled at 30-60 degrees per second, the polypropylene in the mixture can be The phase separation rate between polyethylene and polyethylene is gradually slowed down, which improves the melt rupture temperature and mechanical properties of the prepared base film, and the modified additives in the mixture contain phosphate ester, which will decompose when heated. It decomposes into phosphorus oxyacids, and then catalyzes the dehydration of hydroxyl-containing compounds into charcoal to form a carbonized layer with a more stable structure on the surface. The formation of the carbonized layer can inhibit the transfer of heat and the diffusion of oxygen, thereby achieving the effect of flame retardancy. In addition, the modified additives in the mixture contain triphosphite and 2,6-di-tert-butyl-p-cresol, which can continuously absorb the active free radicals produced by chemical bond breakage due to ultraviolet rays, radiation or other conditions. It makes it difficult to combine with oxygen and cause further damage due to chain reaction afterwards, improves the oxidation resistance of the microporous film material, effectively solves the problem of overall shrinkage caused by too high working temperature, high temperature resistance The ability is weak, and it does not have the effect of flame retardancy and poor oxidation resistance;

Images