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Coating techniques to improve performance of automotive fabrics
15 Feb '10
1 min read
Automotive fabrics are coated for a number of reasons, the two most important being to improve abrasion resistance and secondly to confer some flame-retardancy (FR) properties. Higher the amount of coating applied results in better the barrier properties.
Sometimes extra cross-linking agents, wetting agents and other specialist additives are also included. The compound is mechanically foamed by high speed agitation and air pumped in to give a foam of a predetermined density usually about O.2g/cm3.
This compound is pumped on top of the fabric reverse side up, in front of a doctor blade in front of a stenter. This particular method of fabric coating is referred to as the 'direct method' and there are a number of variations.
This method is excellent for applying relatively low add-ons of resin, say up to about 30-40g/m2. When much heavier weights need to be applied, the compound is not foamed but thickened with a thickening agent.
This has the same effect as foaming, allowing the resin to sit on the surface of the fabric without sinking in, and penetrating to the face side.
Click here to read the complete article.
Sometimes extra cross-linking agents, wetting agents and other specialist additives are also included. The compound is mechanically foamed by high speed agitation and air pumped in to give a foam of a predetermined density usually about O.2g/cm3.
This compound is pumped on top of the fabric reverse side up, in front of a doctor blade in front of a stenter. This particular method of fabric coating is referred to as the 'direct method' and there are a number of variations.
This method is excellent for applying relatively low add-ons of resin, say up to about 30-40g/m2. When much heavier weights need to be applied, the compound is not foamed but thickened with a thickening agent.
This has the same effect as foaming, allowing the resin to sit on the surface of the fabric without sinking in, and penetrating to the face side.
Click here to read the complete article.
Fibre2fashion News Desk - India
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