1、MIL-R-6067 1(MU) SUPERSEDING Frankford Arsenal Purchase Description FED-1657, Rev. 1 14 July 1953 22 May 1967 MILITARY SPECIFICATION RUBBER, CHLORINATED, NATURAL : POWDER 1. SCOPE 1.1 This specifiction covers the requirements for a powdered chlorinated natural rubber used in pyrotechnic mixtures. 2.
2、 APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein: SPECIFICATIONS FEDERAL R-S-366 - Sieves, Standard for Testing Purposes PPP-B-621 - Boxes, Hood, Naiied an
3、d Lock-Corner STANDARDS FEDERAL Fed, Test Method Std. No. 601 - Rubber: Samp.ling and Testing MILITARY MIL-STD-129 - Marking for Shipment and. Storage FSC 1370 i THIS DOCUMENT CONTAINS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-6067 l(MU)
4、(Copies of specifications, standards, drawings , and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications. The following document forms a part of this spe
5、cification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. AME1IICAN SOCIETY FOR TESTING AND YATEKULS MTc j)-18j1-60 - fi1ethad.s 2 Test for Consistency of Adhesives (Applcati.on for coptes sliould be
6、 addressed to the American Society for m iestiiig and Materials , 1916 Race Street, Philadelphia , Pa., 19103). 3.1 Chlorine content. The chlorinated natural rubber shall contain not less than GO percent cillorine. 3.2 Specific voi.ume. The specific volume of the granular rubber powder shall be not
7、less than 1,000 cubic centimeters per pound as shipped. 3.3 SpeciEic ,;ravitv. The specizic $cavity of the powdered rubber sha 11 be riot less than 1.30. 3.4 Color. The color of the jranular powdered rubber shall be white to cream r,;iiite. 3.5 Granulation. The powdered rubber shall be of the :jranu
8、lation shown Ln table I. All percentages shall be by weight using U. S. standard sieves conforming to Rk-S-366. Table I - Granulation 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-606 7 1 (MJ) 3.6 Stability. The chlorinated rubber powder sh
9、all be stable up to 125OC. 3.7 Viscosity. A 20 percent by weight mixture of the rubber powder in toluene shall have a viscosity of not more than 23 nor less than 15 centipoises when tested in accordance with para. 4.4.7. 3.8 Workmanship. The granulated rubber powder shall be free from dirt or dust,
10、carbon black, or any other contaminant that will adversely affect the purpose for which the powdered rubber is intended. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibilitv for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible far the performance of
11、 all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any comercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspect
12、ions are deemed necessary to assure that supplies and services con- form to prescribed requirements. 4.2 u. A lot shall consist of 1,000 pounds or fraction thereof. 4.3 Samplinq. The inspector shall select representative samples of the powder from at least two individual containers or bags of the ma
13、terial. 4.4 Test orocedures . 4.4.1 Chlorine content. Weigh 50 mg. of the sample and determine the chlorine content by the Carius method whereby the material is oxidized in a sealed tube in the presence of nitric acid at 300C and the resulting chloride ion is precipitated and determined gravimetrica
14、lly as silver ch lor ide. 4.4.2 Specific volume. Weigh one pound of the powdered rubber and pour into a graduated cylinder and read off the amount of cubic centimeters. 4.43 Specific gravite. The specific gravity shall be determined by using the pycnometer method in kerosene at 20%. 4.4.4Color. The
15、color of the powdered rubber shall be determined visually. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-VIL-R-bob72 23 M 377770b 0340750 5 I 4.4.5 Granulation. Place a weighed portion of 25 sm. of the dried sample on the appropriate sieve as ind
16、icated in table I. immerse the sieve in a saturated solution of the powdered rubber in 75 percent ethyl alcohol (by volume) in a large evaporating dish, aad shake so that the finer material passes through the sieve, Change the alcohol solution several times. for 2 hours. Remove the material from the
17、 sieve and weigh, above procedure using each of the sieves specified. Use a separate 25 gm. pocton of the sample for the test with each sieve. From these values y calculate the percentage of the sample passed by the prescribed sieve . Partially Dry the residue on the sieve at 43“ plus or minus 3C Re
18、peat the 4.4.6 Stabilitv. The stability shall be determined by such method as approved by the contracting officer. 4.4.7 Viscosity. The viscosity shall be determined at a temperature of 73“ $: 2F with a Brookfield RVF Viscosimeter (ASTM D-1084-60). The rubber mixture (in the container supplied by th
19、e manufacturer) shall be stirred manually for one minute using a one-inch wide spatul-a. completion of the stirring operation, the viscosity shall be determined. Neasurements shall be made at a spindle speed of 10 revolutions per minute (rpm). The spindle used shall be the smallest spindle number ca
20、pable of giving a measurement of the viscosity at a spindle speed of 10 RPM. Viscosity determinations shall be made on each container of natural chlorinated rubber in the sample. viscosity of the chlorinated natural rubber in the sample shall fall within the limits specified in 3.7. Immediately on T
21、he average value of the 5. PREPARATION FOR DELIVERY 5.1 Packanine;. 5.1.1 Level A. The powdered rubber shall be packaged in 50 pound. tin containers or paper bags, as specified in the contract.or purchase order. 5.1.2 Level C. The powdered rubber shall be packaged in accordance with manufacturers co
22、mmercial practice. 5.2 Packing. 5.2.1 Level A. The individual tin containers or paper bags shall be packed in boxes, wood y nailed and lock-corner conforming to PPP-B-621. 5.2.2 Level C. The unit containers shall be packed in accordance with manufacturers commercial practice. 4 Provided by IHSNot fo
23、r ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-R-6067 1(MJ) 5.3 MarkinK. In addition to any special marking required by the contract or order, shipping containers shall be marked in accordance with MIL-STD-129. 6. NOTES 6.1 Jutended use. The granulated rubber powde
24、r is intended for use as a binder in pyrotechnic mixtures. 6.2 Ordering data. Procurement documents should specify the following: (a) Title, number, and date of this specification. (b) Level of packaging and packing (see 5.1 and 5.2). Custodian: Army -MU Preparing activity: Army - bf Project NO, 1370-Al66 *US. GOVERNMENT PRINTING OFFICE: 1867-301-509/27 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
