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    028389

    Rubber condoms--part 9: determination of tensile properties.

    International Organization for Standardization [ISO]

    [Stockholm, Sweden], ISO, 1980 Oct 1. 4 p. (International Standard ISO 4074/9; Ref. No. ISO 4074/9-1980 (E))

    This determination of tensile properties of rubber condoms reviews the scope and field of application, principle, apparatus, the preparation of sample specimens, the procedure, expression of results, and the test report. Part 9 of International Organization for Standardization (ISO) 4074 specifies a method for the determination of the tensile properties of rubber condoms. The test is only applicable to condoms having a sufficiently large smooth area no more than 90 mm from the open end from which a test piece 20 mm in width can be obtained. The principle is: cutting of a test piece from a condom and stretching it until it breaks and, following this, measuring of the tensile force and elongation. The apparatus include cuting die, micrometer dial guage, and tensile testing machine. The condom shall be laid flat with its length at right angles to the cutting edges of the die and the test piece shall be obtained by cutting, with 1 stroke of the press, from a region 80 mm from the open end. Only test pieces which have been completely separated at the 1st attempt shall be used. The procedure involves: measure, to the nearest 0.001 mm, the single wall thickness of the test piece at not less than 4 equivalent points around the ring; dust the test piece with talcum powder, lat it flat, and measure, to the nearest millimeter, the distance between the 2 folded edges; place the test piece over the rollers and stretch it until it breaks; and at break, measure the load, to the nearest 0.1 N, and the separation distance (between the centers of the rollers) to the nearest millimeter. The test report shall include: the identification of the sample the number of samples tested; the tensile strength and elongation at break of each test piece; and the date of testing.
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