GB2050449A

GB2050449A - Stitch Bonded Fabric

Info

Publication number: GB2050449A
Application number: GB7920170A
Authority: GB
Original assignee: Cosmopolitan Textile Co Ltd
Current assignee: Cosmopolitan Textile Co Ltd
Priority date: 1979-06-09
Filing date: 1979-06-09
Publication date: 1981-01-07
Also published as: GB2050449B

Abstract

Stitch bonded fabrics are made with a front bar system of pillar stitches and a back bar system of stitches with missed thread patterning. The back bar stitches are arranged to hold down areas of filling by groups 11a, 11b of tricot stitches connected by thread floats and/or laid- in sections, to leave other areas of filling 12 free from any front bar or back bar thread so as to give the appearance of raised areas or blisters. <IMAGE>

Description

SPECIFICATION Stitch Bonded Fabric This invention relates to stitch bonded fabrics in which a filling is knitted through with front and back guide bar warp thread systems.

Usually, the filling is a fibre fleece such as a cross-folded card web. Other types of filling can include for example a sheet of weft threads or a sheet of foamed plastics material.

So-called two bar fabrics that is to say, fabrics made with front and back bar thread systems have been manufactured in which the front and back bars knit different stitch systems. Reasons for using two independent thread systems in stitch bonding include the production of more interesting surface texture or pattern effects, improved weft-way strength, and the avoidance of laddering. In a well known arrangement, one bar knits pillar stitch while the other bar knits tricot stitch. In another arrangement, both bars knit mirror image systems extending over two or more needles.

The latter arrangement admits the possibility of making a fabric in which there are areas of filling that are free from stitches so that they appear as raised areas or blisters. Such fabric, however, is not very satisfactory, particularly as regards its lengthwise stability, which is considerably inferior to that of fabrics that have pillar stitch on one bar.

The present invention comprises a stitch bonded fabric having a front guide bar system of pillar stitches and a back bar system of stitches with missed thread patterning, characterised in that the back bar system holds down areas of filling with groups of tricot stitches in adjacent wales and adjacent courses, said groups being connected to other groups of tricot stitches in subsequent courses, the back bar threads being laid in or floated between the groups of tricot stitches, so that between the areas of filling that are held down by said groups of stitches there are other areas that are free from any front bar or back bar thread said other areas appearing in the fabric as raised areas or blisters.

Such a fabric, having a pillar stitch ground, does exhibit very good lengthwise stability while giving the fabric designer a good deal of freedom to produce different blister effects and textures.

Very interesting effects are produced when the back bar system has two-miss-one threading.

In some patterns, each thread of the back bar system extends over only two wales, successive groups of tricot stitches being connected by thread floats and/or laid in sections of thread connecting stitches along the same wale.

In other patterns, each thread of the back bar system forms a group of tricot stitches over first and second adjacent wales, then forms a thread float from said first to said second wale, then forms a group of tricot stitches between said second wale and a third wale adjacent said second wale.

In yet further patterns, each thread of the back bar system forms a group of tricot stitches over first and second adjacent wales, then forms a laidin section from said first wale to a third wale also adjacent said second wale, then forms a group of tricot stitches between said third wale and said second wale.

Some of these patterns are very attractive in coarser gauges, say ten gauge or below, seven gauge being particularly attractive for some curtaining and bedspread materials. Even in such coarse gauges, the fabrics have very good strength and dimensional stability.

Embodiments of fabrics according to the invention will now be described with reference to the accompanying drawings in which: Figure 1 is a point diagram for the front and back bar stitch systems of a first fabric, Figure 2 is a point diagram for a second fabric, and Figure 3 is a point diagram for a third fabric.

The Figures illustrate stitch bonded fabrics having a front guide bar system (FB) of pillar stitches and a back bar (BB) system of stitches with missed thread patterning. In the three fabrics illustrated, the back bar threading is two-missone, though considerable variation is possible such as three-miss-one, four-miss-one, threemiss-two, or more complicated threadings such as three-miss-one-four-miss-one and so on. It has to be remembered that if there is also to be missed thread patterning on the front bar, then it has to be ensured that the back bar does not try to form tricot stitches where the front bar is not forming stitches.

The back bar system holds down areas of filling with groups 11 of tricot stitches in adjacent wales and adjacent courses, said groups being connected to other groups 11 of tricot stitches in subsequent courses by the back bar threads being laid in-as at "L'-or floated-as at "F'-between the groups 11 of tricot stitches. Between the areas of filling that are held down by said groups 11 of stitches there are other areas 12 (enclosed on the drawings by dashed lines) that are free from any front bar or back bar thread said other areas 12 appearing in the fabric as raised areas or blisters.

In the pattern shown in Figure 1, each thread of the back bar system forms a group 11 a of tricot stitches over first and second adjacent wales (see thread T in regard to wales W1 and W2) then forms a thread float F from said first walW1- to said second wale-W2-and forms a group 1 b of tricot stitches between said second wale W2 and a third wale W3 adjacent said second wale.

In the pattern shown in Figure 2, each thread T of the back bar system forms a group 1 a of tricot stitches over first and second adjacent wales Wi, W2, then forms a laid-in section L from said first wale W1 to a third wale W3 also adjacent said second wale W2, then forms a group 11 b of tricot stitches between said third wale W3 and said second wale W2.

Figure 3 shows a pattern in which each thread of the back bar system extends over only two wales, successive groups 11 of tricot stitches being connected by thread floats F.

In all cases illustrated, the pattern shown repeats. The length of the repeat is variable of course within the limitations of the particular stitch bonding machinery being used.

Claims

1. A stitch bonded fabric having a front guide bar system of pillar stitches and a back bar system of stitches with missed thread patterning, characterised in that the back bar system holds down areas of filling with groups of tricot stitches in adjacent wales and adjacent courses, said groups being connected to other groups of tricot stitches in subsequent courses, the back bar threads being laid in or floated between the groups of tricot stitches, so that between the areas of filling that are held down by said groups of stitches there are other areas that are free from any front bar or back bar thread said other areas appearing in the fabric as raised areas or blisters.

2. A stitch bonded fabric according to claim 1, characterised in that the back bar thread system has two-miss-one threading.

3. A stitch bonded fabric according to claim 1 or claim 2, characterised in that each thread of the back bar system extends over only two wales, successive groups of tricot stitches being connected by thread floats and/or laid in sections of thread connecting stitches along the same wale.

4. A stitch bonded fabric according to claim 1 or claim 2, characterised in that each thread of the back bar system forms a group of tricot stitches over first and second adjacent wales, then forms a thread float from said first to said second wale, then forms a group of tricot stitches between said second wale and a third wale adjacent said second wale.

5. A stitch bonded fabric according to claim 1 or claim 2, characterised in that each thread of the back bar system forms a group of tricot stitches over first and second adjacent wales, then forms a laid-in section from said first wale to a third wale also adjacent said second wale, then forms a group of tricot stitches between said third wale and said second wale.

6. A stitch bonded fabric according to any one of claims 1 to 5, characterised in that the groups of tricot stitches extend over only three courses between successive laid-in or floated sections.

7. A stitch bonded fabric according to any one of claims 1 to 5, characterised In that the groups of tricot stitches extend over five courses between successive laid-in or floated sections.

8. A stitch bonded fabric according to any one of claims 1 to 7, characterised in that the gauge Is 10 or less.