1、MIL-P-b3LbA, 68 9Ob OL223Vb V h-65-29 MIL-P-63196A (AR) 27 May 1980 MI LI TARY SPEC IF ICAT ION POLYURETHANE ELASTOMER BINDER (For Use in Ammunition) This specification is approved for use by the US Army Armament Research and Development Command and is available for use by ” all Departments and Agen
2、cies of the Department of Defense. 1. SCOPE 1.1 This specification covers two types of polyurethane elastomers for use as a binder for explosive composition: (See 6.4 and 6.5) Type I: Polyurethane with Calcium Stearate Type II: Polyurethane with Talc 2. APPLICABLE DOCUMENT 2.1 The following document
3、s of the issue in effect on date of invitation for bids or request for proposal form a part of the specification to the extent specified herein. SPEC I FI CAT ION MIL I TARY JAN-C- 26 3 - Calcium Sterate MIL-A-48078 - Ammunition, Standard Quality Assurance Provision, General Specification for MIL-T-
4、5 O0 36 Talc, Technical (Tl) FSC: 6810 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS MILITARY MIL-STD-129 - Marking for Shipping and Storage MIL-STD-1218 - ACS Chemicals (Copies of specifications, standards, drawings and publications requ
5、ired by contractors 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 documents form a part of this specification to the extent specified herein. Unless otherwise indicate
6、d, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN SOCIEITY FOR TESTING AND MATERIALS 0412 - Tension testing of Vulcanized Rubber. D624 - Tear Resistance of Vulcanized Rubber. D746 - Brittleness temperature of plastics and rubber by impact test. D792
7、- Specific Gravity and Density of Plastics by Displacement. Di898 - Plastics, Recommended Practice for Sampling of D2240 - Indentation Hardness of Rubber and Plastics by means of a Durometer. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Str
8、eet, Philadelphia, PA 19103). 3. REQUIREMENTS 3.1 Physical form. The polyurethane elastomer shall be supplied in ranular or flake form. It shall be dusted with approximately 0.1% of calcium stearate (JAN-C-263) or commercial talc (MIL-T-50036) to facilitate handling; The certificate :of compliance f
9、urnished with the shipment shall certify which dusting agent has been used. 3.1.1 Solubility. A minimum of 99.9% of the polyurethane elastomer shall be soluble in methyl ethyl ketone (MEK) when tested as described in 4.5.1.2. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted wit
10、hout license from IHS-,-,-MIL-P-63196A (AR) 3.1.2 Viscosity. Solution viscosity of the polyurethane elastomer shall be between 225 and 900 centipoises when tested as described in 4.5.2. 3.1.3 Physical properties. The physical properties of polyurethane elastomer shall conform to the following requir
11、ements: Property Acceptable Appl i cab1 e Value Test Specific Gravity 1.20 + 0.02 4.5.6 Durometer Hardness “A“ 70 10 4.5.7 Tensile Strength (psi) 4000 (Min.) 4.5.8 Ultimate Elongation (%) 600 (Min.) 4.5.9 Graves Tear (lbs/O.l“) 15 (Min.) 4.5.10 Brittle Point (No Break) -70F 4.5.11 3.1.4 Volatile. Th
12、e volatile content of the polyurethane elastomer shall be no greater than 0.4% when tested as specified in 4.5.3. 3.1.5 Color. The color of the polyurethane elastomer shall be a light amber to light brown when determined as specified in 4.5.4. 3.1.6 Foreign matter. The polyurethane elastomer shall b
13、e free of metal inclusions, wooden particles, and other foreign - matter when tested as specified in 4.5.5. 3.2 First article inspection. This specification contains provisions for first article inspection. Requirements for submission of first article samples by the contractor shall be as specified
14、in the contract. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection and standard quality assurance provisions. Unless otherwise specified herein or in the contact, the provisions of MIL-A-48078 shall apply and are hereby made a park of this detail specification. inspections shall be c
15、onductedon this item: 4.2 Classification of inspections. The following types of a. First Article Inspection (See 4.3) b. Quality Conf romance. Inspection (see 4.4) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63196A (AR) 4.3 First article
16、inspection. 4.3.1 Submission. The contractor shall submit a first article sample as designated by the Contracting Officer for evaluation in accordance with provisions of 4.3.2. The first article sample shall consist of 2 kilograms of the polyurethane elastomer. The sample shall be obtained from a pr
17、oduction lot which has been produced by the contractor using the same piocess, procedures and equipment as will be used in fulfilling the contract. All materials shall be obtained from the same sources of supply as will be used in regular production-. 4.3.2 Inspections to be performed. The sample wi
18、ll be subjected by the Government to any or all of the examinations or tests specified in 4.5 of this specification. 4.3.3 Rejection. See MIL-A-48078. 4.4 Quality conformance inspection. 4.4.1 Inspection lot formation. Inspection lots shall comply withlot formation provisions of MIL-A-48078. 4.4.2 E
19、xamination. Unless otherwise specified in the Classification of Defects and test tables, sampling plans for major and minor defects shall be in accordance with MIL-STD-105, Inspection Level II (See MIL-A-48078). 4.4.3 Testing. Precaution. - This specification covers sampling and testing with toxic m
20、aterials. Accordingly, it is emphasized that all applicable safety rules, regulations, and procedures must be followed in handling and processing these mat er i al s. 4.4.3.1 Sampling for test 4.5.1 thru 4.5.11. The elastomer shall be sampled in accordance with ASTM-D1898. If any sample fails to mee
21、t any test requirement, the lot represented by the sample shall be rejected. The classification of defects shall be as specified in the following table: 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-b319bA b m 7997906 0122350 b m MIL-P-6319
22、6A (AR) Inspection/Requirement Defect Classification Solubility Viscos i ty Volatil es Specific Gravity Durometer Hardness Tensile Strength Ultimate Elongation Graves Tear Brittle Point Color Foreign Matter Major Major Major Major Major Major Major Major Major Minor Minor 4.4.4 Inspection equipment.
23、 For the performance of all tests and examinations specified in 4.4.3, commercial inspection equipment should be employed. The contractor shall have available, and utilize correctly, this equipment and is charged with the responsibility of assuring that proper calibra- tion procedures are followed.
24、Government approval of all inspection equipment is required prior to its use for acceptance purposes. 4.5 Test methods and procedures. (See 6.3). The tests to determine compliance with the requirements given in para. 3 shall be performed on the sample obtained in 4.4.3.1. All tests given in this sec
25、tion shall be performed using prescribed procedures for replicate determinations given in standard analytical chemistry textbooks. Also, unless otherwise specified herein, all chemicals shall be ACS Grade in accordance with MIL-STD-1218. 4.5.1 Solubility . 4.5.1.1 Preparation of test solution. Weigh
26、 accurately a If necessary, cut the 45 + 0.09 gram portion of the sample and transfer this sub-sample into a 1 liter beaker (Note: sample into pieces approximately 1 cm long). grams of methylethyl ketone (MEK) to the beaker. Stir-the contents of the beaker with a magnetic stirreii for a period not t
27、o exceed six (6) hours. Precautions should be taken to prevent the loss of solvent during this procedure. Use this solution for the solubility (4.5.1.2) and viscosity (4.5.2) determinations. Add 255 + 0.05 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
28、S-,-,-4.5.1.2 Procedure. Visually inspect the solution obtained in 4.5.1.1 for the presence of insolubles. If the solution appears to contain insolubles (in excess of O.l%), add 500 ml of MEK, stir for 10 minutes, and quantitatively filter the residue and solvent thru a tarpd medium porosity glass c
29、rucible. Dry the crucible and contents in an oven at 100 + 5OC for 30 minutes and weight. Calculate the solubility as- follows: b % Solubility = (W-A) x 100 Where: W = weight of sample, g 4.5.2 viscosity Brookfield solution viscosity. The Brookfield solution W L A = weight of residue, g viscosity sh
30、all be run on the sample solution obtained in 4.5.1.1. The instrument shall be a Brookfield Model LVT 4 spindle viscosimeter or equivalent. The viscosity of the solution shall be run at 25OC with a No. 2 spindle. 4.5.3 Volatiles. Determination o the volatile content of a representative sample of the
31、 test polyurethane material shall be run on the material as received from the manufacturer. The test shall be run at 6OoC in a vacuum overn, and the oven shall be evacuated to an absolute pressure of 150 mm of Hq or lower. The sample shall be 50 + 5 gms and shall be dried to a constant weight. Volat
32、iles shall be reported to the nearest 0.1%. 0 4.5.4 Color. the color of the elastomer shall be 4.5.5 Foreign matter. The elastomer shall be examined 4.5.6 Specific gravity. The specific gravity shall be 4.5.7 Durometer hardness “A“ . The durometer hardness 4.5.8 Tensile strength. The tensile strengt
33、h shall be , determined by visual examination. visually to assure that it is free of foreign matter. determined in accordance with ASTM-D792. + i shall be determined in accordance with ASTM-D2240. determined in accordance with ASTM-D412. ci o 6 .- r, -,- . , -c .n iflr r f - - . -.w .J -s Provided b
34、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63196A (AR) 4.5.9 Ultimate Elongation. The ultimate elongation shall be determined in accordance with ASTM-D412. 4.5.10 Graves Tear. The Graves tear shall be determined in accordance with ASTM-D624. 4.5.11
35、Brittle Point. The brittle point shall be determined in accordance with ASTM-D746. 5. PREPARATION FOR DELIVERY 5.1 Packing 5.1.1 Commercial. Unless otherwise specified, the polyurethane elastomer shall be packed in accordance with manufacturer I s commercial practice to assure acceptance by common c
36、arrier for safe delivery at first destination for use. containers shall be marked in accordance with MIL-STD-129. 5.2 Marking. Unless otherwise specified, the shipping 6. NOTES 6.1 Ordering data. See MIL-A-48078. 6.2 Submission of inspection equipment designs for approval (See MIL-A-48078). Submit e
37、quipment designs, as required, to Commander, US Army Armament Research and Development Command, ATTN: DRDAR-QAR, Dover, NJ 07801 6.3 Prior approval of the Contracting Officer is required for use of equivalent kest methods. A description of the proposed method should be submitted through the Contract
38、ing Officer to: Commander, US Army Armament Research and Development Command, ATTN: DRDAR-QAR, Dover, NJ 07801. This description should include but not be limited to, the procedures used, the accuracy and precision of the method, test data to demonstrate the accuracy and precision and drawings of an
39、y special equipment required (see 6.2). 6.4 Intended use. The material covered in this specification is.intended to be used as a binder for explosives. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
