Powder hot-melting and bonding technology of automotive carpet

Abstract

The invention provides a powder hot-melting and bonding technology of an automotive carpet which can produce a good sound-absorbing effect. The technology comprises the steps as follows: a, a polyethylene resin with a low melting point is ground into powder with different particle sizes through a flour mill; b, the powder is divided into fourth classes of less than 400 mu m, 400-600 mu m, 600-1000 mu m and larger than 1000 mu m; c, the powder is mixed according to a weight ratio of 30-50% of the powder with the particle size less than 400 mu m, 20-40% of the powder with the 400-600 mu m particle size , 15-25% of the powder with the 600-1000 mu m particle size and 5-15% of the powder with the particle size larger than 1000 mu m; the mixed powder is sprayed on a surface, required to be bounded, of a surface layer or a bottom layer through a powder sprayer; e, the carpet is dried through a drying oven so as to soften or melt the powder; and f, the surface layer and the bottom layer of the carpet are rolled and bonded through a mill roll.

Description

technical field [0001] The invention relates to the field of automobile carpets, in particular to a powder hot-melt bonding composite process for automobile carpets. Background technique [0002] At present, car carpets generally include a surface layer and a bottom layer. Most of the composites between the surface layer and the bottom layer are glued or laminating, and some are powdered and thermally bonded. But there is a common problem that a layer of adhesive film or plastic film is formed at the joint between the layers of the carpet. Due to the reflection of the sound by the film, the sound-absorbing and noise-reducing function of the carpet is affected, and the weight of the carpet increases. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a powder hot-melt bonding process capable of producing car carpets with good sound-absorbing effect. [0004] In order to solve the above problems, the technical proces...

AI Technical Summary

Problems solved by technology

But there is a common problem that a layer of glue film or plastic film is formed at the joint between the layers of the carpet. Due to the reflection of the film on the sound, the sound absorption and noise reduction function of the carpet is affected, and the weight of the carpet increases.

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