Method of forming a membrane, especially a latex or polymer membrane, including multiple discrete layers
First Claim
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.
4 Assignments
0 Petitions
Accused Products
Abstract
Single and multiple layer membranes such as gloves and condoms include one or more deactivating barrier layers and/or indicating layers to indicate to a user membrane breach or the presence of a harmful substance in blood or body fluids. A membrane may include one or more permeable or semipermeable layers to disperse contained substances such as lubricants, biocides, spermicides, or indicators outwardly, and may also include permeable or semipermeable layers to allow transmission of body fluids or other environmental fluids inwardly into contact with an indicating or treating substance. An intermediate layer of a multi-layer membrane may include a substance to wipe, cleanse, sterilize, or otherwise treat a piercing needle. A membrane may include a sealing or coating to entrap indicators or other agents such as biocides therein. A method of making membranes such as gloves results in a double glove having discrete inner or outer layers joined only in a cuff region. Admixing of gentian violet with latex prior to membrane formation provides biocidal properties, anti-aging effects prolonging shelf-life and tear resistance, and reduces allergic reactions in latex-allergic users.
231 Citations
29 Claims
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1. A method of making a multi-layer latex membrane including at least two discrete layers, comprising the steps of:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of making a multi-layer membrane including at least two discrete layers, comprising the steps of:
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(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. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of making a multi-layer latex membrane including at least two discrete layers, comprising the steps of:
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(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.
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Specification