Heat resistant separation fabric

Abstract

The heat resistant separation fabric for use as tool cover in glass processing comprises heat resistant yarns (100). The heat resistant yarns comprise a core (110) and at least one wrap yarn (123, 125). The core is a core yarn. The core yarn is a multifilament glass yarn. The at least one wrap yarns (123, 125) comprises stainless steel fibers. The core yarn is present in the heat resistant yarn without crimp. The at least one wrap yarn is wrapped around the core yarn.

Description

TECHNICAL FIELD[0001]The invention relates to the field of heat resistant separations fabrics, e.g. used as tool cover in the production of glass. For instance as tool cover in the production of mirror glass or glass panels for windows in cars. For instance as covering of rings or annular molds used for quenching glass panels. For instance as covering of rollers used to transport glass panels.BACKGROUND ART[0002]Heat resistant separation fabrics are made out of yarns consisting out of fibers that have sufficient heat resistance properties. The use of stainless steel fibers for this purpose is well known. The use of hybrid yarns, which are yarns comprising more than one type of heat resistant fibers, has also been described in the field of heat resistant separation fabrics.[0003]Knitted heat resistant separation fabrics comprising stainless steel fibers are known, e.g. from WO2011 / 116992. The document describes fabrics consisting out of stainless steel fiber yarns. The document also ...

AI Technical Summary

Benefits of technology

This patent is about a special fabric that is used in the production of glass products. This fabric helps create consistent and high-quality glass across different tools on a production line. The key ingredients in the fabric include a core yarn and a wrap yarn, which work together to achieve this quality. The use of this fabric results in better quality mirror glass, particularly when produced on different tools.

Problems solved by technology

It is mentioned that the use of core yarns out of metal fibers or rich in metal fibers is not preferred, as it results in a yarn which is too rigid.

It is a problem of the yarns and fabrics disclosed in FR2838455 and WO2005 / 098105 that fibers are loosely bonded into the yarn surface.

The result is hairiness on the yarn and fabric surface, and fibers getting loose and lost during use of the heat resistant separation fabric.

Such hairiness and loose fibers have negative impacts on the quality of the glass that is produced.

The most difficult quality aspect in the production of bent mirrors is correct reflection of objects that appear in the bent mirror.

Even small markings on the mirror have a negative impact on the reflection.

Because of the reflection requirement, quality requirements for mirrors are of a different nature than for (automotive) window glass, and are higher, more demanding.

It is a problem of the heat resistant separation fabrics of the prior art that they do not provide optimal performance in terms of consistency of the quality of the glass product processed on different tools in parallel on the glass production line, in general, and particularly on mirror glass production lines.

It is a problem that the fabrics of the prior art are not optimal in view of the increasing quality requirements of automotive glass products.

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