Claims
- 1. A method of making a multi-layer latex membrane including at least two discrete layers, comprising the steps of:
- (a) depositing onto a former a first latex layer;
- (b) treating at least a portion of said first layer with a separating agent;
- (c) treating at least a portion of said first layer with a material effective as a coagulant for latex;
- (d) depositing over at least a portion of said first layer on said former a second latex layer, said separating agent effective to substantially prevent fusing of said first and second layers in at least a portion of said membrane; and
- (e) setting or curing said first and second layers.
- 2. The method of claim 1, further comprising the step of treating at least a portion of said first latex layer with a biocide prior to step (d).
- 3. The method of claim 2, wherein said biocide is admixed with said coagulant.
- 4. The method of claim 2, wherein said biocide is admixed with said release agent.
- 5. The method of claim 2, wherein said biocide comprises gentian violet.
- 6. The method of claim 2, wherein said biocide comprises Nonoxynol 9.
- 7. The method of claim 2, wherein said biocide comprises chlorhexidene.
- 8. The method of claim 2, wherein said separating agent deposited in step (b) does not contact a circumferentially extending zone on said first layer such that said first and second layers fuse together in said zone.
- 9. The method of claim 8, wherein said membrane comprises a glove.
- 10. The method of claim 8, wherein said membrane comprises a condom.
- 11. The method of claim 1, wherein said membrane comprises a glove.
- 12. The method of claim 1, wherein said membrane comprises a condom.
- 13. The method of claim 1, further comprising the step of depositing a substance over at least a portion of said first layer on said former prior to step (d), wherein said substance is selected from the group consisting of lubricants, sealants, biocides, indicators, spermicides, antiseptics, gels, hydrogels, pituitous substances, cleansing agents, surfactants, detergents, abrasives, coating agents, wiping agents, fibers, tactile enhancing objects, scales, discs and other materials for inhibiting penetration of needles and other sharps, and sheet forming agents, such that said substance is substantially contained between said first latex layer and said second latex layer.
- 14. The method of claim 1, further comprising the step of depositing at least one additional layer over at least a portion of said second layer.
- 15. The method of claim 1, wherein said separating agent comprises zinc stearate.
- 16. A method of making a multi-layer membrane including at least two discrete layers, comprising the steps of:
- (a) depositing onto a former a material selected from the group consisting of liquid polymers and polymers dissolved in a solvent to form a first layer;
- (b) treating at least a portion of said first layer with a surfactant;
- (c) depositing over at least a portion of said first layer on said former a material selected from the group consisting of liquid polymers and polymers dissolved in a solvent to form a second layer, said surfactant effective to substantially prevent fusing of at least a portion of said first and second layers; and
- (d) setting or curing said first and second layers.
- 17. The method of claim 16, further comprising the step of treating at least a portion of said first layer with a biocide prior to step (c).
- 18. The method of claim 17, wherein said biocide is admixed with said surfactant.
- 19. The method of claim 17, wherein said biocide comprises gentian violet.
- 20. The method of claim 17, wherein said biocide comprises Nonoxynol 9.
- 21. The method of claim 17, wherein said biocide comprises chlorhexidene.
- 22. The method of claim 16, wherein said surfactant deposited in step (b) does not contact a circumferentially extending zone on said first layer such that said first and second layers fuse together in said zone.
- 23. The method of claim 16, wherein said membrane comprises a glove.
- 24. The method of claim 16, wherein said membrane comprises a condom.
- 25. The method of claim 17, wherein said membrane comprises a glove.
- 26. The method of claim 17, wherein said membrane comprises a condom.
- 27. The method of claim 16, further comprising the step of depositing a substance over at least a portion of said first layer on said former prior to step (c), wherein said substance is selected from the group consisting of lubricants, sealants, biocides, indicators, spermicides, antiseptics, gels, hydrogels, pituitous substances, cleansing agents, surfactants, detergents, abrasives, scales, discs and other materials for inhibiting penetration of needles and other sharps, coating agents, wiping agents, fibers, tactile enhancing objects, and sheet forming agents, such that said substance is substantially contained between said first and second layers.
- 28. The method of claim 16, further comprising the step of depositing at least one additional layer over at least a portion of said second layer.
- 29. A method of making a multi-layer latex membrane including at least two discrete layers, comprising the steps of:
- (a) depositing onto a former a first latex layer;
- (b) treating at least a portion of said first layer with a separating agent;
- (c) depositing over at least a portion of said first layer on said former a second latex layer, said separating agent effective to substantially prevent fusing of said first and second layers in at least a portion of said membrane; and
- (d) setting or curing said first and second layers.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of U.S. patent application Ser. No. 08/291,002, filed Aug. 15, 1994, U.S. Pat. No. 5,549,924 which is a continuation-in-part of U.S. patent application Ser. No. 07/976,881, filed Nov. 16, 1992, now U.S. Pat. No. 5,338,565, which is a continuation of U.S. patent application Ser. No. 07/825,546 filed Jan. 24, 1992, now U.S. Pat. No. 5,165,953, which is a continuation-in-part of both U.S. patent application Ser. No. 07/536,772 filed Jun. 12, 1990, now U.S. Pat. No. 5,130,159 and U.S. patent application Ser. No. 07/536,773 filed Jun. 12, 1990, now U.S. Pat. No. 5,128,168, both of which are continuations-in-part of U.S. patent application Ser. No. 07/482,978 filed Feb. 22, 1990, now U.S. Pat. No. 5,045,341, which is a continuation-in-part of U.S. patent application Ser. No. 07/246,337 filed Sep. 19, 1988, now U.S. Pat. No. 4,935,260, which is a continuation-in-part of U.S. patent application Ser. No. 07/143,184, filed Jan. 13, 1988, now U.S. Pat. No. 4,919,966, which is a continuation-in-part of U.S. patent application Ser. No. 07/074,629, filed Jul. 17, 1987, now U.S. Pat. No. 4,771,482. All of these applications and patents are owned by the same Applicant. The entire disclosures of each of the foregoing patent applications and patents are hereby incorporated by reference herein.
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