Substrate for supporting abrasive grit adhesives, method for forming same and abrasive material

Claim 2

A substrate (10) for supporting an abrasive grit (20) adhesive top coat (18) having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, said substrate comprising: a latex-treated backing sheet (14), and a layer (16) of neutral barrier material disposed on top of said backing sheet (14), said neutral barrier material being adapted for adhering said top coat (18) to said backing sheet (14) while separating said backing sheet (14) and top coat (18) to permit the curing of said top coat (18) without interference from said backing sheet (14) and said neutral barrier material (16).

Claim 3

The substrate of Claim 1 wherein said neutral barrier material is selected from the group consisting of low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer and ethylene methyl acrylate copolymer.

Claim 4

The substrate of Claim 1 or 2 wherein said backing sheet (14) is treated with a primer (15) having a coating weight of about 0.015 g/m 2 (0.004 lb/1300 ft 2 ) to about 0.94 g/m 2 (0.25 lb/ 1 3 0 0 f t 2 ).

Claim 5

The substrate of Claim 3 wherein said primer is selected from the group consisting of urethane, poly(vinylidene chloride), ethylene-acrylic acid copolymer and polyethyleneimine.

Claim 6

5 . The substrate of Claim 3 wherein said primer is polyethyleneimine.

Claim 7

The substrate of one of the preceding Claims wherein said backing sheet is corona treated.

Claim 8

The substrate of one of the preceding Claims wherein said layer (16) of neutral barrier material is corona treated to promote the wetting and adhesion of said top coat to said layer of neutral barrier material.

Claim 9

The substrate of one of the preceding Claims which further includes a layer (17) of anti-slip material on a surface of said latex-treated backing sheet (16) opposed to said layer (16) of neutral barrier material.

Claim 10

; 9. A method of forming a substrate for supporting an abrasive grit adhesive top coat having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, said method comprising the steps of: a) coating a latex-treated backing sheet with a layer of neutral barrier material to protect and separate said abrasive grit adhesive from said latex-treated backing sheet; and b) subjecting said coated backing sheet to a corona treatment to promote the wetting and adhesion of said abrasive grit adhesive to said neutral barrier material.

Claim 11

; 9. A method of forming a substrate for supporting an abrasive grit adhesive top coat having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, said method comprising the steps of: a) coating a latex-treated backing sheet with a layer of neutral barrier material to protect and separate said abrasive grit adhesive from said latex-treated backing sheet; and b) subjecting said coated backing sheet to a corona treatment to promote the wetting and adhesion of said abrasive grit adhesive to said neutral barrier material.

Claim 12

1 0 . The method of Claim 9 wherein said neutral barrier material is selected from the group consisting of low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer and ethylene methyl acrylate copolymer.

Claim 13

ll. The method of Claim 9 or 10 which further includes the step of subjecting said latex-treated backing sheet to an initial corona treatment prior to said coating step.

Claim 14

The method of Claim 9 or 10 which further includes the steps of priming said latex-treated backing sheet with a primer having a coating weight of about 0.015 g/m (0.004 lb/1300 ft 2 ) to about 0.94 g/ m 2 (0.25 lb/13 00 f t 2 ) .

Claim 15

The method of Claim 12 wherein said primer is selected from the group consisting of urethane, poly(vinylidene chloride), ethylene-acrylic acid copolymer and polyethyleneimine.

Claim 16

The method of Claim 12 wherein said primer is polyethyleneimine.

Claim 18

The method of Claim 9 or 10 which further includes the step of heat treating said latex-treated backing sheet after said coating step and before said corona treatment of said coated backing sheet.

Claim 20

A laminate (10) adapted for supporting an abrasive grit (20) adhesive top coat (18) having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, said laminate comprising: a latex-treated backing sheet (14), and a layer (16) of neutral barrier material disposed on top of said backing sheet (14), said neutral barrier material being adapted for adhering said top coat (18) to said backing sheet (14) while separating said backing sheet (14) and top coat (18) to permit the curing of said top coat (18) without interference from said backing sheet (14) and said neutral barrier material (16).

Claim 21

A laminate (10) adapted for supporting an abrasive grit (20) adhesive top coat (18) having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, said laminate comprising: a latex-treated backing sheet (14), and a layer (16) of neutral barrier material disposed on top of said backing sheet (14), said neutral barrier material being adapted for adhering said top coat (18) to said backing sheet (14) while separating said backing sheet (14) and top coat (18) to permit the curing of said top coat (18) without interference from said backing sheet (14) and said neutral barrier material (16).

Claim 22

The laminate of Claim 18 wherein said neutral barrier material is selected from the group consisting of low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer and ethylene methyl acrylate copolymer.

Claim 23

An abrasive material comprising: a latex-treated backing sheet (14), a top coat layer (18) of abrasive grit (20) and adhesive, said adhesive having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, and a layer (16) of neutral barrier material disposed between and in contact with said backing sheet (14) and said top coat (18), said layer (16) of neutral barrier material adhering said top coat (18) to said backing sheet (14) while separating said backing sheet (14) and top coat (18) to permit the curing of said top coat (18) without interference from said backing sheet (14) and said neutral barrier material.

Claim 24

An abrasive material comprising: a latex-treated backing sheet (14), a top coat layer (18) of abrasive grit (20) and adhesive, said adhesive having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, and a layer (16) of neutral barrier material disposed between and in contact with said backing sheet (14) and said top coat (18), said layer (16) of neutral barrier material adhering said top coat (18) to said backing sheet (14) while separating said backing sheet (14) and top coat (18) to permit the curing of said top coat (18) without interference from said backing sheet (14) and said neutral barrier material.

Claim 25

An abrasive material comprising: a latex-treated backing sheet (14), said backing sheet being treated with a layer (15) of primer having a coating weight of 0.015 g/m 2 (0.004 lb/1300 ft 2 ) to about 0.94 g/m 2 (0.25 lb/1300 ft ) followed by a corona treatment, a top coat layer (18) of abrasive grit (20) and adhesive, said adhesive having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, and a layer (16) of neutral barrier material disposed between and in contact with said backing sheet (14) and said top coat (18), said layer (16) of neutral barrier material being selected from the group consisting of low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer and ethylene methyl acrylate copolymer, said layer (16) of neutral barrier material adhering said top coat (18) to said backing sheet while completely separating said backing sheet (14) and said top coat (18) to permit the curing of said top coat (18) without interference from said backing sheet (14) and said neutral barrier material, said layer (16) of neutral barrier material furthermore being corona treated to promote the wetting and adhesion of said top coat (18) to said layer (16) of neutral barrier material.

Claim 26

An abrasive material comprising: a latex-treated backing sheet (14), said backing sheet being treated with a layer (15) of primer having a coating weight of 0.015 g/m 2 (0.004 lb/1300 ft 2 ) to about 0.94 g/m 2 (0.25 lb/1300 ft ) followed by a corona treatment, a top coat layer (18) of abrasive grit (20) and adhesive, said adhesive having a curing system selected from the group consisting of acid-inhibited, base-inhibited and oxidative curing systems, and a layer (16) of neutral barrier material disposed between and in contact with said backing sheet (14) and said top coat (18), said layer (16) of neutral barrier material being selected from the group consisting of low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer and ethylene methyl acrylate copolymer, said layer (16) of neutral barrier material adhering said top coat (18) to said backing sheet while completely separating said backing sheet (14) and said top coat (18) to permit the curing of said top coat (18) without interference from said backing sheet (14) and said neutral barrier material, said layer (16) of neutral barrier material furthermore being corona treated to promote the wetting and adhesion of said top coat (18) to said layer (16) of neutral barrier material.

Claim 27

The abrasive material of Claim 20 or 21 which further includes a layer (17) of anti-slip material on a surface of said latex-treated backing sheet (14) opposed to said layer (16) of neutral barrier material.