EP0073313A2
Expired / Lapsed
EP
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A stitch bonded fabric for reinforcing coated abrasive backings
Assignee: Saint Gobain Abrasives Inc
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Filing: 1982-06-25
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Granted: —
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Expires: 2002-06-25
Abstract
Abstract Stitch bonded fabrics were found to be suitable substrates for coated abrasives when the fabric has a strength in the warp direction of at least 30 dekanewtons (daN) per centimeter (cm) of width, a fill yarn cover factor of at least 40%, and stitch yarns with a tensile strength of at least 0.5 daN. For substitution of the established commercial classes of abrasives known as X and Y weights, the fabrics are preferably made on a Malimo machine, with 14-22 warp yarns of 840-1300 denier high tenacity multifilament polyester or glass per 25 cm of fabric width, at least 64 fill yarns of staple or texturized multifilament polyester per 25 cm of fabric length, and stitch yarns of 70-140 denier high tenacity multifilament polyester.
Inventors
- 👤 Dhiraj Harlbhaj Darjee
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 05:40
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/10; D04B; D04B21/00; D04B21/14; D04B21/16; D04B21/165; D10; D10B; D10B2403/00; D10B2403/02; D10B2403/024; D10B2403/0241; D10B2403/02412
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
99 words
A stitch bonded fabric, comprising: (a) a warp yarn array having a tensile strength of at least 30 dekanewtons per centimeter of fabric width; (b) a fill yarn array disposed on one side of said warp yarn array and having a cover factor of at least 40%; and (c) a plurality of stitch yarns, each such yarn having a tensile breaking strength of at least 0.5 dekanewtons, formed in stitched or knitted loops around groups of individual yarn members of said warp and fill yarn arrays, whereby the two said yarn arrays are bonded together into a coherent fabric.
Claim 2
Dependent Claim
99 words
A stitch bonded fabric, comprising: (a) a warp yarn array having a tensile strength of at least 30 dekanewtons per centimeter of fabric width; (b) a fill yarn array disposed on one side of said warp yarn array and having a cover factor of at least 40%; and (c) a plurality of stitch yarns, each such yarn having a tensile breaking strength of at least 0.5 dekanewtons, formed in stitched or knitted loops around groups of individual yarn members of said warp and fill yarn arrays, whereby the two said yarn arrays are bonded together into a coherent fabric.
Claim 3
Dependent Claim
23 words
A fabric according to claim 1, wherein the number of stitch yarns is at least as great as the number of warp yarns.
Claim 4
Dependent Claim
33 words
A fabric according to claim 1 or 2, wherein said warp yarn array consists of substantially uniformly spaced yarns in a number not greater than one per millimeter of width of the fabrics
Claim 5
Dependent Claim
35 words
A fabric according to any one of the preceding claims, wherein at least half the volume of the yarns of said warp yarn array consists of fibers of a polyester, polyamide, polyvinyl alcohol, or glass.
Claim 6
Dependent Claim
25 words
A fabric according to any one of the preceding claims, wherein said fill yarn array comprises more than 25 yarns per centimeter of fabric lengtho
Claim 7
Dependent Claim
37 words
A fabric according to any one of the preceding claims, wherein at least half the volume of the yarns of said fill yarn array consists of a spun staple polyester, texturized multifilament polyester, or texturized multifilament polyamideo
Claim 8
Dependent Claim
35 words
A fabric according to any one of the preceding claims, wherein at least half the volume of said stitching yarns consists of fibers having a tensile breaking strength of at least 0.007 dekanewtons per denier.
Claim 9
Dependent Claim
23 words
A fabric according to any one of the preceding claims, wherein at least half the volume of said stitch yarn consists of polyestero
Claim 10
Dependent Claim
114 words
9 o A process for manufacturing a stitch bonded fabric comprising the steps of (a) holding a tensioned first yarn array between sets of hooks spaced along both sides of a second yarn array and (b) moving said first yarn array, by moving the sets of hooks whereon it is held, into a position where said first yarn array can be bonded, substantially simultaneously across the entire width of the fabric, to said second yarn array by stitched or knitted loops formed by yarns distinct from the yarns of said first and second yarn arrays, wherein at least two yarns of said first array are held on each hook of said sets of hooks.
Claim 11
Dependent Claim
114 words
9 o A process for manufacturing a stitch bonded fabric comprising the steps of (a) holding a tensioned first yarn array between sets of hooks spaced along both sides of a second yarn array and (b) moving said first yarn array, by moving the sets of hooks whereon it is held, into a position where said first yarn array can be bonded, substantially simultaneously across the entire width of the fabric, to said second yarn array by stitched or knitted loops formed by yarns distinct from the yarns of said first and second yarn arrays, wherein at least two yarns of said first array are held on each hook of said sets of hooks.
References Cited (Backward Citations)
No citation records indexed.
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