| 摘要 |
1492330 Slip coatings on rubber articles SUTURES INC 2 Oct 1975 [24 June 1975] 40379/75 Heading B2E A rubber article, e.g. a sheet material, glove or girdle has a slip coating of a polymer latex comprising 5 to 95% of a film forming, non-elastomeric synthetic polymer component (I) whose elongation is at least 200% and 5 to 95% of a normally solid, non-elastomeric synthetic polymer (II) whose elongation is below 20% and whose coefficient of friction is up to 0.20, the elongation of the slip coating being 200 to 700%, its coefficient of friction up to 0.25 and its thickness below 0.005 inches. The polymer (I) may be (a) a vinyl chloride/ vinyl acrylate mixture, (b) a vinylidene chloride/alkyl acrylate mixture or (c) a vinyl acetate/alkyl acrylate mixture and polymer (II) may be (a) a polyvinyl chloride-polyvinyl ester admixture or (b) a polyvinylidene chloride/ polyvinyl ester admixture. In making surgeon's gloves of this type, a form is dipped into natural rubber latex and rapidly withdrawn from the latex. The coated form is coagulated with 20% acetic acid in isopropanol. The immersion and coagulating steps are repeated until a glove of suitable gauge is obtained. The form is now dipped into a synthetic resin latex of vinyl chloride/ butyl acrylate. The form is dried at 180-185‹F for 60 minutes before stripping the glove therefrom. Each glove is then leached in hot water and dried. Many suitable rubber types are specified as substrates as are many synthetic resin copolymers and mixtures. |
