Patent EP0239126A2 successfully refreshed from Google Patents.
EP0239126A2
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EP
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Stitch bonded fabric, use of same for making coated abrasives, and coated abrasives
Assignee: Saint Gobain Abrasives Inc
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Filing: 1987-03-27
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Granted: —
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Expires: 2007-03-27
Abstract
Abstract Stitch bonded fabrics suitable to be used as backings for flexible coated abrasives with facile straight tear in either the length or cross directions have (1) an areal density between 51 and 153 gm/m 2 , (2) a tensile strength in the length direction between 5.4 and 12.6 kN/m of width, (3) a tensile strength in the cross direction which is between 5.4 and 11.7 kN/m of length and is between 0.9 and 1.35 times as great as the length direction tensile strength, (4) an elongation to break in the length direction of not more than 40%, and (5) an elongation to break in the cross direction of not more than 35%. To make the coated abrasives, the fabric is prepared for coating by saturation with at least its own weight of a finishing adhesive composed primarily of latices of acrylic homopolymers, acrylic copolymers, butadiene-styrene polymers, or mixtures of these types. Conventional making, grit coating, and sizing are then performed to yield a coated abrasive with a ratio of length direction tensile modulus to cross direction tensile modulus within the range of 0.8 to 1.8.
Inventors
- 👤 Raymond E. Pemrick
- 👤 Dhiraj H. Darjee
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:28
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/02; D; D04; D04B; D04B21/00; D04B21/14; D04B21/16; D04B21/165; D10; D10B; D10B2403/00; D10B2403/02; D10B2403/024; D10B2403/0241; D10B2403/02412; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/273; Y10T442/2738
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
162 words
A stitch bonded fabric suitable for use as a backing for flexible coated abrasives comprising a plurality of stitch yarns (12;22,24;32) oriented generally in the machine direction and a plurality of weft yarns (11;21;31) oriented generally straightly and in the cross machine direction and held within loops formed by the stitch yarns (12; 22,24;32), characterized in that (1) the fabric has a mass between 51 and 153 gm/m 2 , (2) the fabric has a tensile strength in the machine direction between 5.4 and 12.6 kN/m of width, (3) the fabric has a tensile strength in the cross machine direction which is both between 5.4 and 11.7 kN/m of length and between 0.9 and 1.35 times as great as the tensile strength in the machine direction, (4) the fabric has an elongation to break in the machine direction of not more than 40%, and (5) the fabric has an elongation to break in the cross machine direction of not more than 35%.
Claim 2
Dependent Claim
162 words
A stitch bonded fabric suitable for use as a backing for flexible coated abrasives comprising a plurality of stitch yarns (12;22,24;32) oriented generally in the machine direction and a plurality of weft yarns (11;21;31) oriented generally straightly and in the cross machine direction and held within loops formed by the stitch yarns (12; 22,24;32), characterized in that (1) the fabric has a mass between 51 and 153 gm/m 2 , (2) the fabric has a tensile strength in the machine direction between 5.4 and 12.6 kN/m of width, (3) the fabric has a tensile strength in the cross machine direction which is both between 5.4 and 11.7 kN/m of length and between 0.9 and 1.35 times as great as the tensile strength in the machine direction, (4) the fabric has an elongation to break in the machine direction of not more than 40%, and (5) the fabric has an elongation to break in the cross machine direction of not more than 35%.
Claim 3
Dependent Claim
16 words
A fabric according to claim 1, wherein the stitch yarns (12;22;32) have a chain stitch pattern.
Claim 4
Dependent Claim
102 words
A fabric according to claim 2, further characterized in that (1) said stitch yarns (12) and said weft yarns (11) are texturized multifilament polyester yarns, (2) said weft yarns (11) are from 55-85 denier in size and are present in the fabric at a count of between 48 and 96 yarns per 25 mm of fabric length, (3) said stitch yarns (12) are between 70 and 150 denier in size and are present in the fabric at a count of between 14 and 22 yarns per 25 mm of fabric width, and (4) the stitch length is between 0.5 and 1.2 mm.
Claim 5
Dependent Claim
63 words
A fabric according to claim 1 additionally comprising straight laid warp yarns (23) in the machine direction in the same count per 25 mm of fabric width as said stitch yarns (24), said straight laid warp yarns (23) all lying on one side of said straightly oriented weft yarns (21), further characterized in that said stitch yarns (24) have a tricot stitch pattern.
Claim 6
Dependent Claim
118 words
A fabric according to claim 4, further characterized in that (1) said stitch yarns (24), said weft yarns (21), and said warp yarns (23) are all texturized multifilament polyester yarns, (2) said weft yarns (21) are from 55-85 denier in size and are present in the fabric at a count of between 48 and 96 yarns per 25 mm of fabric length, (3) said stitch yarns (24) are between 70 and 150 denier in size and are present in the fabric at a count of between 14 and 22 yarns per 25 mm of fabric width, (4) said warp yarns (23) are from 150-300 denier in size, and (5) the stitch length is between 0.5 and 1.2 mm.
Claim 7
Dependent Claim
43 words
A fabric according to claim 2, additionally comprising (1) straight laid-in warp yarns (23) in the machine direction between each pair of chain stitch yarns (22), and (2) tricot stitch yarns (24) interlacing with said weft yarns (21) and said warp yarns (23).
Claim 8
Dependent Claim
142 words
A fabric according to claim 6, further characterized in that (1) said chain stitch (22) and tricot stitch yarns (24), said weft yarns (21), and said warp yarns (23) are all texturized multifilament polyester yarns, (2) said weft yarns (21) are from 55-85 denier in size and are present in the fabric at a count of between 48 and 96 yarns per 25 mm of fabric length, (3) said tricot stitch yarns (23) are between 70 and 150 denier in size and are present in the fabric at a count of between 14 and 22 yarns per 25 mm of fabric width, (4) said warp yarns (23) are from 150-300 denier in size, (5) said chain stitch yarns (22) are from 55-85 denier in size, and (6) the stitch length for both tricot and chain stitches is between 0.5 and 1.2 mm.
Claim 9
Dependent Claim
61 words
A fabric according to claim 2, further comprising straight laid-in warp yarns (33) and further characterized in that it additionally contains laid-in, substantially coplanar serpentine yarns (34) on the opposite side of said warp yarns (33) from said straightly oriented weft yarns (31), each of said serpentine yarns (34) being held within alternate loops of two adjacent chain stitch yarns (32).
Claim 10
Dependent Claim
28 words
Use of the stitch bonded fabric of one of the preceding claims for making flexible coated abrasives with facile straight tear in either the length or cross direction.
Claim 11
Dependent Claim
123 words
A coated abrasive comprising a plurality of size graded abrasive grains distributed over and affixed by an adhesive to at least one major surface of a flexible backing material, characterized in that (1) said flexible backing material includes (a) a fabric according to any one of claims 1-8 and (b) a saturant which fills the interstices of said fabric and is present in an amount with mass not less than the mass of said fabric; (2) said coated abrasive has the property of tearing straight in both machine and cross machine directions: (3) said coated abrasive has a ratio of its tensile modulus in the machine direction to its tensile modulus in the cross machine direction in the range between 0.8 and 1.8.
Claim 12
Dependent Claim
37 words
A coated abrasive according to claim 10, further characterized in that said saturant comprises the product of drying a synthetic latex of materials selected from the group consisting of polyacrylates, acrylic copolymers, butadiene-styrene polymers, and mixtures thereof.
References Cited (Backward Citations)
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