ARMY MIL-O-60540 (2)-1994 OBTURATING BANDS PLASTIC RIGID HIGH IMPACT POLYVINYL CHLORIDE (MOLDED)《聚氯乙烯(模塑)高冲击强度刚性塑料密封圈》.pdf

1、MIL-0-60540 (2) 7999906 1771178 338 INCH-POUND MIL-0-60540 (AR) AMENDMENT 2 06 January 1994 SUPERSEDING AMENDMENT 1 23 March 1987 MILITARY SPECIFICATION OBTURATING BANDS, PLASTIC, RIGID, HIGH IMPACT POLYVINYL CHLORIDE (MOLDED) This Amendment forms a part of Military Specification MIL-0-60540 (AR), d

2、ated 30 June 1966, and is approved for use by theUS Army Armament, Munitions and Chemical Command, and is avialable for use by all Departments and Agencies of the Department of Defense. PAGE 1 Add the following new paragraphs: “2.2 Other publications. The following document(s) form a part of this sp

3、ecification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS shall be the issue of

4、 the nongovernment documents which is current on the date of the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS ASTM D 256 - Impact Resistance of Plastics and Electrical Insulating Materials ASTM D 638 - Tensile Properties of Plastics ASTM D 1243 - Dilute Solution Viscosity of Vinyl Chlori

5、de Polymers (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103). 2.3 Order of precedence. In the event of a conflict between the text of the specification and the references cited herein (except for associated detai

6、l specifications, specification sheets or MS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained.“ 1 of 3 FSC 1395 APSC N/A DISTEBUTION STAT3ENT A. Appr

7、oved for public release; distribution is uniimite,j. Licensed by Information Handling ServicesMIL-0-60540 AMENDMENT 2 3.2 Delete in its entirety and substitute the following: “3.2 Material. The material shall consist of polyvinyl chloride resin of high molecular weight, suitably compounded with heat

8、 stabilizers, a suitable elastomer, lubricants and pigments. No re-grind or scrap will be allowed. shall have an inherent viscosity greater than 0.65 when tested IAW paragraph 4.4.5. 3.2.2 Tensile strenqth. The minimum tensile strength of PVC compound shall be 6,000 pounds per square inch (p.s.i.) w

9、hen tested IAW paragraph 4.4.6. shall be 360,000 p.s.i. minimum when tested IAW paragraph 4.4.7. 3.2.1 Inherent viscosity. Polyvinyl chloride (PVC) resin 3.2.3 Tensile modulus. The tensile modulus of PVC compound 3.2.4 Izod impact strenqth. The izod impact strength at 23 degrees C shall not be less

10、than 19 foot - pound nor more than 26 foot - pound when tested IAW paragraph 4.4.8.“ (NOTE: Paragraphs 3.2.3 and 3.2.4, min. tensile and max. impact strength values respectively, were changed from the previous amendment 1.) PAGE 3 Add the following new paragraphs: “4.4.5 Inherent viscositv. The inhe

11、rent viscosity shall be tested in accordance with ASTM D 1243. 4.4.6 Tensile strenqth. The tensile strength shall be 4.4.7 Tensile modulus. The tensile modulus shall be tested tested as specified in ASTM D 638. as spsecified in ASTM D 638. a 4.4.8 Izod impact strenqth. The izod impact strength range

12、 shall be tested as specified in ASTM D 256.“ 2 Licensed by Information Handling ServicesCustodian: Army - AR MIL-0-60540 (AR) AMENDMENT 2 The margins of this amendment are marked with an asterisk to in- dicate where changes from the previous amendment were made. This was done as a convenience only

13、and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirement of this document based on the entire content irrespective of the marginal notations and relationship to the last previous amend- ment. Preparing activity: Army - AR (Project 1395-A270) 3 Licensed by Information Handling Services