ASTM D3772-15 (R2021) pdf free download.Standard Specification for Industrial Rubber Finger Cots.
1.1 This specification covers the requirements for finger cots used in industrial applications which are made from natural rubber latex or a synthetic nitrile polymer. The purpose of this specification is to obtain consistent performance among products produced in various locations or at various times in the same location.
1.2 This specification does not cover the sate and proper use of finger cots or products of special construction for special use.
1.3 The values stated in SI units are to he regarded as the standard.
6. Performance
6.1 Finger cots sampled in accordance with Section 7. shall meet the following performance requirements:
6.1.1 Have consistent physical dimensions in accordance with 8.2.2.
6.1.2 Have acceptable physical property characteristics in accordance with 8.3.
6.1.3 Meet the inspection criteria as specifIed in 8.4.
7. Sampling
7.1 Finger cots shall be sampled and inspected in accordance with ISO 2859. The inspection levels and acceptable quality levels (AQL) shall conform to those specified in Table 1, or as agreed between the purchaser and seller.
8. Test Methods
8.1 The following tests shall be conducted to ensure the requirements of Section 9 are met as prescribed in Table 1.
8.2 Design:
8.2.1 Rim—The open end of the finger cot shall terminate in an integral rim.
8.2.2 Physical Dimen.cio,zs—The length shall he 70 ± 5 mm. The single wall thickness shall he 0.09 ± 0.03 mm or as agreed upon by the manufacturer and end user. The width when laid flat of the various sizes shall he as follows: small, 24 ± 2 mm; medium. 28 2 mm; large, 30 ± 2 mm; extra large, 34.5 ± 2.5 mm; XXL, 36.5 ± 2.5 mm.
8.2.3 Sampling—Sampling shall he conducted according to the inspection level and AQL specified in Table 1.
8.2.4 Testing—Measure the length of the finger cot to the nearest 1 mm. Measure the width to the nearest 0.5 mm at a distance at least 5 mm from the ends. Measure the thickness to the nearest 0.01 mm at a distance about 5 mm from the open end, on specimens from which any lubricant has been removed with water or isopropanol. The thickness micrometer shall conform to Test Methods D412, except for the smaller-scale graduations.
8.2.5 The precision and bias for measuring dimensions are as specified in Practice D3767.
8.3 Physical Properties:
8.3.1 Finger cots shall meet the minimum requirements specified in Table 2.ASTM D3772 pdf download.