GB2125075A - Knitted fabric resistant to high temperatures - Google Patents

Abstract

A knitted fabric material includes a bulk material 2 knitted from texturised glass to form rows of stitches 4. A reinforcing yarn 6 is laid into the bulk material 2 and connected to the basic construction by an underlap on each wale that it crosses. The reinforcing yarn 6 may be made of high performance Kevlar material, glass, continuous ceramic, metallic material or a blend of any of these materials. This knitted fabric material has a bulky sort-handling characteristic due to the knitted bulk material 2, and has a high-strength and non-run characteristic provided by the reinforcing yarn 6. <IMAGE>

Description

SPECIFICATION High temperature knitted fabric The present invention relates to a fabric material and is particularly concerned with a warp knitted type of fabric material where the loops made from each warp thread are formed substantially along the length of the fabric.

It is an aim of the invention to produce a bulky, drapable type of fabric using high temperature yarns. Accordingly there is provided a knitted fabric material comprising a bulk material of high performance fibres and a reinforcing yarn laid in the bulk material.

Such a fabric with excellent insulation properties and very good fabricating properties has a good handle. It is expected the currently available asbestos and other high temperature woven fabrics can be replaced with the new fabric.

The bulkiness of the fabric, which is the key part of the material, is achieved by using texturised glass yarns and knitting on a fairly open gauge.

Another feature of the fabric is it's relative high strength which is attributed to the inclusion of high performance laid-in yarns. Such warp yarns are held into the basic construction by being trapped between the face layer and/or the under laps of the basic construction. The nature of these yarns can be either glass or Kevlar or blends for maximum ambient strength, continuous ceramic yarn for maximum high temperature performance or metallic yarns, or a blend of these depending on the particular end property required. Such laid-in yarns when incorporated into the bulk material reduces excessive overstretch and any tendency to fray.

One embodiment of a knitted fabric material constructed in accordance with the invention will now be described by way of example only with reference to the accompanying drawing in which: Figure 1 is a diagrammatic plan view of one knitted fabric material of the invention.

Referring to Figure 1 a knitted fabric material of the invention comprises a bulk material 2, knitted in a conventional manner from texturised glass to form rows of stitches 4. A reinforcing yarn 6 made of high performance Kevlar material, or glass or continuous ceramic or metallic or glass or a blend of any of the above is laid into the bulk material 2 as illustrated and connected to the basic construction by an underlap on each wale that it crosses.

This illustrated fabric material possesses a bulky soft handling characteristic due to the knitted material 2 and has a relatively highstrength and non-run characteristic provided by the reinforcing yarn 6.

Because of its construction and nature the illustrated fabric material could for example be used to replace the known asbestos type materials or other high temerature woven fabrics.

It is found that the bulky nature of this material due to excessive texturising of the base yarn provides a very high insulation property superior to known woven fabrics. Because of the readily formable characteristics attributed to dual way stretch of the basic loop construction it can be easily formed into multi-contoured shapes.

Claims (Filed on 3 Aug 1983) 1. A knitted fabric material comprising a bulk material of high performance fibres and a reinforcing yarn laid in the bulk material.

2. A knitted material as claimed in Claim 1 in which the bulk material is knitted from texturised glass yarns on a fairly open gauge.

3. A knitted material as claimed in Claim 1 or Claim 2, in which the reinforcing yarn is held in the bulk material by being trapped between the face layer and/or the under laps of the basic construction.

4. A knitted material as claimed in any preceding Claim in which the reinforcing yarn is glass or Kevlar or blends thereof.

5. A knitted material as claimed in any one of Claims 1 to 3 in which the reinforcing yarn is continuous ceramic yarn or metallic yarns or a blend thereof.

6. A knitted material as claimed in any preceding Claim in which the reinforcing yarn is connected to the bulk material by an under lap on each wale that it crosses.

7. A knitted material substantially as herein described and shown in the accompanying drawing.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION High temperature knitted fabric The present invention relates to a fabric material and is particularly concerned with a warp knitted type of fabric material where the loops made from each warp thread are formed substantially along the length of the fabric. It is an aim of the invention to produce a bulky, drapable type of fabric using high temperature yarns. Accordingly there is provided a knitted fabric material comprising a bulk material of high performance fibres and a reinforcing yarn laid in the bulk material. Such a fabric with excellent insulation properties and very good fabricating properties has a good handle. It is expected the currently available asbestos and other high temperature woven fabrics can be replaced with the new fabric. The bulkiness of the fabric, which is the key part of the material, is achieved by using texturised glass yarns and knitting on a fairly open gauge. Another feature of the fabric is it's relative high strength which is attributed to the inclusion of high performance laid-in yarns. Such warp yarns are held into the basic construction by being trapped between the face layer and/or the under laps of the basic construction. The nature of these yarns can be either glass or Kevlar or blends for maximum ambient strength, continuous ceramic yarn for maximum high temperature performance or metallic yarns, or a blend of these depending on the particular end property required. Such laid-in yarns when incorporated into the bulk material reduces excessive overstretch and any tendency to fray. One embodiment of a knitted fabric material constructed in accordance with the invention will now be described by way of example only with reference to the accompanying drawing in which: Figure 1 is a diagrammatic plan view of one knitted fabric material of the invention. Referring to Figure 1 a knitted fabric material of the invention comprises a bulk material 2, knitted in a conventional manner from texturised glass to form rows of stitches 4. A reinforcing yarn 6 made of high performance Kevlar material, or glass or continuous ceramic or metallic or glass or a blend of any of the above is laid into the bulk material 2 as illustrated and connected to the basic construction by an underlap on each wale that it crosses. This illustrated fabric material possesses a bulky soft handling characteristic due to the knitted material 2 and has a relatively highstrength and non-run characteristic provided by the reinforcing yarn 6. Because of its construction and nature the illustrated fabric material could for example be used to replace the known asbestos type materials or other high temerature woven fabrics. It is found that the bulky nature of this material due to excessive texturising of the base yarn provides a very high insulation property superior to known woven fabrics. Because of the readily formable characteristics attributed to dual way stretch of the basic loop construction it can be easily formed into multi-contoured shapes. Claims (Filed on 3 Aug 1983)

1. A knitted fabric material comprising a bulk material of high performance fibres and a reinforcing yarn laid in the bulk material.

2. A knitted material as claimed in Claim 1 in which the bulk material is knitted from texturised glass yarns on a fairly open gauge.

3. A knitted material as claimed in Claim 1 or Claim 2, in which the reinforcing yarn is held in the bulk material by being trapped between the face layer and/or the under laps of the basic construction.

4. A knitted material as claimed in any preceding Claim in which the reinforcing yarn is glass or Kevlar or blends thereof.

5. A knitted material as claimed in any one of Claims 1 to 3 in which the reinforcing yarn is continuous ceramic yarn or metallic yarns or a blend thereof.

6. A knitted material as claimed in any preceding Claim in which the reinforcing yarn is connected to the bulk material by an under lap on each wale that it crosses.

7. A knitted material substantially as herein described and shown in the accompanying drawing.