Negative-pressure needling method of aramid fiber/glass fiber mat

Abstract

The invention relates to a negative-pressure needling method of an aramid fiber / glass fiber mat and belongs to the technical field of textile processing. The negative-pressure needling method of the aramid fiber / glass fiber mat comprises the steps that negative-pressure suction is conducted on a fluffy aramid fiber / glass fiber net undergoing opening, carding and lapping under the negative-pressurecondition when the fiber passes through the upper surface of a needling table, the sucked aramid fiber / glass fiber net shrinks in the negative-pressure operation direction, and an upper needling plate located above the needling table needles the shrunk aramid fiber / glass fiber net while the aramid fiber / glass fiber net shrinks. By adding a negative-pressure device, the needling times are decreased, and fiber damage caused by needling is decreased. Under the suction effect of negative pressure on aramid fiber / glass fiber bundles, the problem of low needling efficiency caused by fluffing of thefluffy aramid fiber / glass fiber net is solved, accordingly the needling efficiency and finished product quality of the fluffy aramid fiber / glass fiber mat are improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a negative pressure acupuncture method for aramid fiber / glass fiber felt, which belongs to the technical field of textile processing. Background technique [0002] Aramid fiber / glass fiber mat is due to its chemical resistance, fire resistance, flame retardant, waterproof, aging resistance, weather resistance, insulation and other characteristics. It is used as fiberglass base cloth, anti-corrosion, heat preservation, fire-proof and flame-retardant, waterproof material, sound-proof material, thermal lining material, filter material, epoxy copper clad board and electrical insulation products, among which it is widely used in flame-retardant. The production process of the conventional aramid fiber / glass fiber mat is to open and card the aramid fiber and glass fiber respectively, and then alternately lay the net, and use a barbed needle to pass through several layers of aramid fiber / glass fiber nets. Puncture, the aramid fiber / gl...

AI Technical Summary

Problems solved by technology

Its disadvantage is that in the process of forming aramid fiber / glass fiber felt by needle punching, because aramid fiber is soft and the surface of glass fiber is smooth, when the needle is hooked to form a fiber bundle, some aramid fiber / glass fiber will be damaged due to the small friction coefficient. This leads to low efficiency of fiber bundle formation, resulting in low efficiency of needle punching to achieve compaction, and ultimately low interlayer strength of aramid fiber / glass fiber mat

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