Claims
- 1. A treated polyamide fiber cord for rubber reinforcement obtained by applying a solution of resorcinol- formaldehyde-rubber latex adhesive to a high tenacity polyamide fiber cord having a denier per filament of 1.5-10 and a yarn tenacity of at least 10.0 g/d, in which the resulting treated polyamide fiber cord embedded in vulcanized rubber has a tenacity of at least 8.5 g/d and the resorcinol-formaldehyde rubber latex adhesive impregnated in the cord has a swelling ratio X in dimethyl sulfoxide of 122% to 340%, and the solution of resorcinol-formaldehyde rubber latex adhesive satisfies the following:
- (a) R/F is from 1/2.3 to 1/1.1,
- (b) RF/L is from 1/10 to 1/4,
- (c) S is from 0.05 to 0.8,
- (d) A is from 0 to 0.5,
- (e) S+A is from 0.05 to 0.8,
- (f) C is from 10 to 24,
- (g) a is from 10 to 80,
- (h) b is from 0 to 7, and
- (i) c is from 20 to 60;
- wherein R/F is a molar ratio of resorcinol/formaldehyde, RF/L is a weight ratio of the total amount of resorcinol and formaldehyde to the total amount, as solid content, of rubber latex, S is a weight ratio of alkali metal hydroxide to the total solid content of resorcinol-formaldehyde rubber latex adhesive solution in %, A is a weight ratio, as NH.sub.4 OH, of an aqueous solution of NH.sub.3 to the total solid content of resorcinol-formaldehyde rubber latex adhesive solution in %, C is a weight ratio of the total content of resorcinol-formaldehyde rubber latex adhesive solution in %, a is a weight ratio, as solid content, of a vinyl pyridine (VP) latex to the total solid content of all of VP latex, styrene-butadiene rubber (SBR) latex and at least one of natural rubber (NR) and isoprene rubber (IR) lattices in %, b is a weight ratio, as solid content, of SBR latex to the total solid content of all lattices in %, and c is a weight ratio, as solid content, of at least one of IR and NR lattices to the total solid content of all lattices in %.
- 2. The treated polyamide fiber cord according to claim 1, wherein the solution of resorcinol-formaldehyde rubber latex adhesive satisfies the following:
- (a) R/F is from 1/2.0 to 1/1.3,
- (b) RF/L is from 1/8 to 1/5,
- (c) S is from 0.1 to 0.5,
- (d) A is from 0 to 0.3,
- (e) S+A is from 0.1 to 0.5,
- (f) C is from 14 to 22,
- (g) a is from 30 to 60,
- (h) b is from 10 to 50, and
- (i) c is from 25 to 50;
- wherein R/F is a molar ratio of resorcinol/formaldehyde, RF/L is a weight ratio of the total amount of resorcinol and formaldehyde to the total amount, as solid content, of rubber latex, S is a weight ratio of alkali metal hydroxide to the total solid content of resorcinol-formaldehyde rubber latex adhesive solution in %, A is a weight ratio, as NH.sub.4 OH, of an aqueous solution of NH.sub.3 to the total solid content of resorcinol-formaldehyde rubber latex adhesive solution in %, C is a weight ratio of the total solid content of resorcinol-formaldehyde rubber latex adhesive solution in %, a is a weight ratio, as solid content, of vinyl pyridine (VP) latex to the total solid content of all of VP latex, styrene-butadiene rubber (SBR) latex and at least one of natural rubber (NR) and isoprene rubber (IR) lattices in %, b is a weight ratio, as solid content, of SBR latex to the total solid content of all lattices in %, and c is a weight ratio, as solid content, of at least one of IR and NR lattices to the total solid content of all lattices in %.
- 3. The treated polyamide fiber cord according to claim 1, wherein the denier per filament of the cord is within the range of 3-8.
- 4. The treated polyamide fiber cord according to claim 1, wherein the polyamide fiber cord comprises nylon-6,6 fiber.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-072123 |
Mar 1991 |
JPX |
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Parent Case Info
This is a Continuation of application Ser. No. 07/850,989 filed Mar. 12, 1992, now abandoned.
US Referenced Citations (22)
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Continuations (1)
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Number |
Date |
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Parent |
850989 |
Mar 1992 |
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