Abstract
A fire resistant textile material comprising a fire resistant textile material comprising a woven face fabric composed of fibres selected from: meta-aramid, para-aramid, polyamideimide and mixtures thereof; wherein the number of warp face threads, per unit width (cm) is greater than the number of weft threads, per unit length (cm).
Claims
1. A fire resistant textile material comprises a single woven warp backed fabric composed of fibres selected from: meta-aramid, para-aramid, polyamideimide, polybenzimidazole, polybenzoxazole and mixtures thereof; wherein the fabric comprises face warp threads and back warp threads, wherein the number of face warp threads per unit width (cm) is greater than the number of weft threads per unit length (cm); and wherein each back warp thread either interlaces or passes under successive weft threads so that the ratio of the total number of interlaced weft threads to passed under weft threads is in a range from 1:2 to 1:20.
2. A fire resistant textile material as claimed in claim 1, wherein the ratio is selected from: 1:2; 1:5; 1:8; 1:11; 1:14; 1:17; 1:20.
3. A fire resistant textile material as claimed in claim 1, wherein the back warp threads form a repeating pattern in which the total number of interlaced threads to passed under weft threads is an integral integer divisible by 3.
4. A fire resistant textile material as claimed in claim 1, wherein the back warp threads form a repeating pattern consisting of successively interlacing first weft threads followed by extending beneath an array of weft threads.
5. A fire resistant textile material as claimed in claim 1, wherein the back warp thread extends beneath an array comprising a number of adjacent weft threads, wherein the number is an integer between 2 and 20, preferably between 5 and 14.
6. A fire resistant textile material as claimed in claim 1, wherein the face warp threads have an elongation at break greater than the elongation at break of the back warp or weft threads.
7. A fire resistant textile material as claimed in claim 1, wherein the face warp threads are selected from meta-aramid fibres including more than 50% meta-aramid fibres.
8. A fire resistant textile material as claimed in claim 1, wherein the face warp threads comprise polybenzimidazole fibres.
9. A fire resistant textile material as claimed in claim 8 wherein the warp face threads comprise a blend of polybenzimadazole fibres with up to 10% w/w polyamide fibres or 10% w/w of a blend of polyamide with up to 5% w/w antistatic fibres.
10. A fire resistant textile material as claimed in claim 1 wherein the face warp threads comprise a proportion of meta-aramid fibres equal or greater than 90%, for example greater than 93%, for example greater than 95%.
11. A fire resistant textile material as claimed in claim 1 wherein the back warp threads are selected from para-aramid fibre blends including at least 25% para-aramid fibres.
12. A fire resistant textile material as claimed in claim 1 wherein the face warp threads comprise: stretch broken para-aramid fibres or a blend of stretch broken para-aramid and polybenzimidazole (PBI), polyetherketone, flame retardant viscose or carbon fibres.
13. A fire resistant textile material as claimed in claim 1 in the back warp threads comprising para-aramid or PBI have a count finer than 60/2 Nm.
14. A fire resistant textile material as claimed in claim 1, wherein the face of the fabric contains abrasion resistant fibres.
15. A fire resistant textile material as claimed in claim 1, wherein low shrinkage threads are located behind the face fabric.
16. A fire resistant textile material as claimed in claim 1, wherein the fabric is a 2×1 twill or 2×1 twill with rip stop.
17. A fire resistant textile material as claimed in claim 1, wherein each back warp thread is interlaced with a weft thread.
18. A firefighter's garment comprising a textile material in accordance with claim 1.
Description
[0060] The invention is further described by means of an example, but not in any limitative sense, with reference to the accompanying drawings of which:
[0061] FIG. 1 illustrates a first fabric in accordance with this invention;
[0062] FIG. 2 illustrates the second fabric in accordance with this invention;
[0063] FIG. 3 illustrates the third fabric in accordance with this invention; and
[0064] FIG. 4 illustrates a fourth fabric in accordance with this invention.
[0065] FIG. 1 shows a fabric in which face warp threads A interlace with weft threads C to form a 2×1 twill gaberdine effect face to the cloth. Back warp threads B interlace with weft threads C in such a way that the point of interlacing is hidden by the face warp threads A. The back warp threads B lie on the back of the fabric, unseen on the face but adding bulk and weight to the fabric.
[0066] FIG. 1A is a cross sectional diagram of the fabric showing the interlacing of 1 face warp thread A and 1 back warp thread B with the weft threads C. The diagram illustrates that the repeat of the fabric weave utilises 6 weft threads C. The face warp thread A interlaces 4 times with the weft threads C being an average of 1.5 weft threads C per interlacing. The back warp thread B interlaces 2 times with the weft threads C being an average of 3.0 weft threads C per interlacing. The different average of the interlacing i.e. 1.5 and 3.0 requires application of differential tensions to the face warp threads A and the back warp threads B in the weaving machine. This will ensure a trouble free weaving process which will achieve a final fabric which meets the specified technical properties of the fabric.
[0067] FIG. 2 shows a fabric in which face warp threads A interlace with weft threads C and D to form a 2×1 rip stop twill gaberdine effect face to the cloth. Back warp threads B interlace with weft threads C and D in such a way that the point of interlacing is hidden by the face warp threads A. The back warp threads B lie on the back of the fabric, unseen on the face but adding bulk and weight.
[0068] FIG. 2A is a cross sectional diagram of the fabric showing the interlacing of 1 face warp thread A and 1 back warp thread B with the weft threads C and D. The diagram illustrates that the repeat of the fabric weave utilises 12 weft threads C and D. The face warp thread A interlaces 8 times with the weft threads C and D being an average of 1.5 weft threads C and D per interlacing. The back warp thread B interlaces 4 times with the weft threads C and D being an average of 3.0 weft threads C and D per interlacing. The different average of the interlacing i.e. 1.5 and 3.0 requires application of differential tensions to the face warp threads A and the back warp threads B in the weaving machine. This will ensure a trouble free weaving process to achieve a final fabric which meets the specified technical properties of the fabric.
[0069] FIG. 3 shows a fabric in which face warp threads A interlace with face weft threads C and back weft threads E. The interlacing with weft threads C form a 2×1 twill gaberdine effect face to the cloth. Back warp threads B interlace with weft threads C and E in such a way that the point of interlacing is hidden by the face warp threads A. The back warp threads B and the back weft threads E lie on the back of the fabric, unseen on the face but adding bulk and weight to the fabric.
[0070] FIG. 3A is a cross sectional diagram of the fabric showing the interlacing of 1 face warp thread A and 1 back warp thread B with the face weft threads C and the back weft threads E. The diagram illustrates that the repeat of the face fabric weave utilises 6 weft threads C. The face warp thread A interlaces 4 times with the face weft threads C being an average of 1.5 weft threads C per interlacing. The back warp thread B interlaces 2 times with the face weft threads C being an average of 3.0 weft threads C per interlacing. The different average of the interlacing i.e. 1.5 and 3.0 requires application of differential tensions to the face warp threads A and the back warp threads B in the weaving machine in order to ensure a trouble free weaving process which will achieve the final fabric which meets the specified technical properties of the fabric.
[0071] FIG. 4 is a diagram showing a fabric in accordance with this invention in which the face warp threads A interlace with face threads C and D and back weft threads F. The interlacing with weft threads C and D form a 2×1 rip stop twill gaberdine effect face to the cloth. Back warp threads B interlace with weft threads C and D in such a way that the point of interlacing is hidden by the face warp threads A. The back warp threads B and the back weft threads F lie on the back of the fabric, unseen on the face but adding bulk and weight.
[0072] FIG. 4A is a cross sectional diagram of the fabric showing the interlacing of 1 face warp thread A and 1 back warp thread B with the face weft threads C and D and the back weft threads F. The diagram illustrates that the repeat of the face fabric weave utilises 6 weft threads C and D. The face warp thread A interlaces 4 times with the face weft threads C and D being an average of 1.5 weft threads C and D per interlacing. The back warp thread B interlaces 2 times with the face weft threads C and D being an average of 3.0 weft threads C and D per interlacing. The different average of the interlacing i.e. 1.5 and 3.0 requires application of differential tensions to the face warp threads A and the back warp threads B in the weaving machine in order to ensure a trouble free weaving process which will achieve the final fabric which meets the specified technical properties of the fabric.
