AIR FORCE MIL-PRF-87895 A-1998 COMPOUND POLYMERIC BASED HOT-MELT (CAVITY LINING) (FOR INTERNAL USE IN AMMUNITION)《供内部弹药使用(洞衬剂)热熔聚合物基涂料》.pdf

《AIR FORCE MIL-PRF-87895 A-1998 COMPOUND POLYMERIC BASED HOT-MELT (CAVITY LINING) (FOR INTERNAL USE IN AMMUNITION)《供内部弹药使用(洞衬剂)热熔聚合物基涂料》.pdf》由会员分享，可在线阅读，更多相关《AIR FORCE MIL-PRF-87895 A-1998 COMPOUND POLYMERIC BASED HOT-MELT (CAVITY LINING) (FOR INTERNAL USE IN AMMUNITION)《供内部弹药使用(洞衬剂)热熔聚合物基涂料》.pdf（8页珍藏版）》请在麦多课文档分享上搜索。

1、* MIL-PRF-87895A 9999906 2063453 5T0 1 INCH-POUND 1 10 ADriI 1998 SUPERSEDING MIL-C-87895 (USAF) 12 December 1983 MIL-PRF-87895A(USAF) PERFORMANCE SPECIFICATION COM POU ND, POLYMERIC BASED, HOT-MELT (CAVITY LI NI NG), (FOR INTERNAL USE IN AMMUNITION) This specification is approved for use by the Dep

2、artment of the Air Force and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of polymeric basic hot-melt general purpose bomb cavity lining material for coating the internal wall of bombs prior to loading with

3、EAK (Ethylene diammonium dinitrate Ammonium Nitrate Potassium nitrate) and EALK (Ethylene diammonium dinitrate Aluminium Ammonium nitrate Potassium nitrate) explosives. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification.

4、This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements docume

5、nts cited in sections 3 and 4 of this specification, whether or not they are listed. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: ASCIENSI, Bldg 560, 2530 Loop Road West, Wright-Patterson AFB

6、 OH 45433-7101 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or bv letter.) AMSC NIA FSC 1325 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking

7、 permitted without license from IHS-,-,-2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those li

8、sted in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). STANDARDS DEPARTMENT OF DEFENSE MIL-STD-331 MIL-STD-81 O MIL-STD-1751 Fuze and Fuze Components, Environment and Performance Tests For Test Method

9、 Standard for Environmental Engineering Considerations and Laboratory Tests Safety and Performance Tests for Qualification of Explosives (Unless otherwise indicated, copies of the above specifications, standards, and handbooks are available from the Standardization Document Order Desk, 700 Robbins A

10、venue, Building 4D, Philadelphia, PA 191 1 1-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in

11、 the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D 92 ASTM D 937 ASTM D 1208 ASTM D 2196 Standard Test Method for Flash and Fire

12、Points by Cleveland Open Cup (DoD adopted) Standard Test Method for Cone Penetration of Petrolatum (DoD adopted) Standard Test Methods for Common Properties of Certain Pigments (DoD adopted) Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield) Viscom

13、eter (DoD adopted) Standard Test Method for Volatile Content of Coatings (DoD adopted) Standard Test Method for Softening Point by Ring-and-Ball Apparatus (DoD adopted) ASTM D 2369 ASTM E 28 (Application for copies should be addressed to the American Society for Testing and Materials (ASTM), 1 O0 Ba

14、rr Harbor Dr., West Conshohocken, PA 19428-2959.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-t MIL-PRF-87895A 9999906 2063453 373 = MIL-PRF-87895A(USAF) CHARACTERISTIC 2.4 Order of precedence. In the event of a conflict between the text of thi

15、s document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. REQUIREMENT INSPECTION 3. REQUIREMENTS REQUIREMENT .91 f.04 3200 e00 centipoises 450F m

16、in 500F min 0.1 YO max -65F min 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. INSPECTION 4.5.1 4.5.2 4.5.5 4.5.5 4.5.8 4.5.13 3.2 Materials. The material shall be composed of two parts: a base, Part A, and a plasticizer,

17、Part B. Part A shall consist of a pure amorphous polypropylene hot melt thermoplastic, conforming to the requirements specified in table I, and Part B shall consist of an Isobutylene-butene copolymer (commonly known as polybutenes) conforming to the requirements specified in table II. TABLE I. Part

18、A, base characteristics. Specific gravity at 73F Viscosity at 375F Softening point Flash point Fire point Volatile content Ash content Acidity Glass transition temDerature .86f.04 350W500 centipoises 295k5“F 500F min 500F min .5% max ,5940 max .1% max -40F min 4.5.1 4.5.2 4.5.3 4.5.5 4.5.5 4.5.6 4.5

19、.7 4.5.8 4.5.1 3 TABLE II. Part B, plasticizer characteristics. CHARACTERISTIC Specific gravity Viscosity at 21 0F Flash point Fire point Acidity Glass transition temperature 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-87895A m 999990b

20、 2063454 20T m MIL=PRF-87895A(USAF) REQUIREMENT .86 f.04 1500 fi00 centipoise 220F min 1 O0 gm15 sed25“C (77F) 15 min 50 gm/5 sed45“C (1 15F) 90 max 500F min 450F min -65F max 200 gd60 sec/OC (32F) 5 min 3.2.1 Formulation. Parts A and B shall be combined in a ratio of 65 f.1 Part A to 35 f.1 Part B.

21、 The materials shall be combined via melt blending at a temperature of 350F. Blending shall be sufficient to produce a homogeneous mixture. INSPECTION 4.5.1 4.5.2 4.5.3 4.5.4 4.5.5 4.5.5 4.5.13 3.2.2 Product characteristics. The compound (combined material) when prepared shall consist of a hot melt

22、thermoplastic and conform to the requirements specified in table III when tested in accordance with 4.5 REQUIREMENT Volatile content Ash content Acid content TABLE 111. Compound characteristics. MAXIMUM VALUE INSPECTION 5% 4.5.6 5% 4.5.7 -1 % 4.5.8 CHARACTERISTIC Specific gravity Viscosity at 375F S

23、oftening point Penetration Fire point Flash point Glass transition temperature 3.2.3 Chemical, electrical and mechanical properties. 3.2.3.1 Flexibility. A dried film of the compound on a metal panel shall show no chipping, scaling, or cracking when tested as specified (see 4.5.9). 3.2.3.2 Chemical

24、requirements. The compound shall conform to the chemical requirements specified in table IV. TABLE IV. Chemical requirements. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-PRF-87895A 9999906 2063455 i146 MIL-PRF-87895A(USAF) 3.3 Environmen

25、tal conditions. 3.3.1 Temperature and humidity cycling. The formulation compound must withstand (show no chipping, cracking, or loss of adhesion) temperature extremes from 160F to -65OF, (see 4.5.12). 3.3.2 Thermal shock. The compound must withstand (show no chipping, cracking, or loss of adhesion)

26、thermal shock cycling in accordance with MIL-STD-81 O, Method 503.2. 3.3.3 Stability. When subjected to vacuum thermal stability test (see 4.5.10) the reactivity of the polymeric compound with EAK and EALK explosives shall not exceed 2.0 mL of gas over and above that generated by the controls when t

27、he test is conducted at 100 +.5% for 48 hours. The explosives tested shall be in accordance with established EAK and EALK formulation guidelines. 3.4 Workmanship. The finished product shall be homogeneous and free of contamination from foreign matter. 4. VERIFICATION 4.1 Classification of inspection

28、s. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 First article inspection. First article inspection shall be performed on ten pounds of the hot melt compound and one pound of each ingredient use

29、d in formulating the compound when a first article sample is required (see 3.1). This inspection shall include the examination of 4.5 and the tests of 4.5.1 through 4.5.1 3. 4.3 Conformance inspection. Conformance inspection shall include the examination of 4.5 and the tests of 4.5.1 and 4.5.13. 4.4

30、 Examination. Sample shall be examined for compliance with the requirements specified in 3.2 through 3.3. 4.5 Methods of inspection. 4.5.1 Specific gravity. The specific gravity of the compound shall be determined by gas pycnometry using a Quantachrom Pentapycnometer or other suitable gas pycnometer

31、. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-PRF-87895A(USA F) 4.5.2 Viscosity. The viscosity of the compound shall be determined in accordance with ASTM D 2196, except that the temperature of the sample shall be 375 fl*F and a No. 3 spin

32、dle at 20 rpm shall be used. 4.5.3 Softening point. The softening point of the compound shall be determined in accordance with ASTM E28. 4.5.4 Penetration. The penetration values of the compound shall be determined in accordance with ASTM D937. 4.5.5 Flash and fire points. The open cup flash and fir

33、e points of the compound shall be determined in accordance with ASTM D92. 4.5.6 Volatile content. The volatile content of the compound shall be determined in accordance with ASTM D2369. 4.5.7 Ash content. The ash content of the compound shall be determined in accordance with ASTM D1208, Sec 2. 4.5.8

34、 Acidity or alkalinity. Dissolve 5 gm sample of the compound in 10 mL of toluene, which is neutral to phenolphthalein. Shake the solution with 100 mL of distilled water in a 250 ml separatory funnel for at least five minutes. Filter and titrate with N/100 H2S04 or IV100 NaOH as necessary using pheno

35、lphthalein as indicator. A blank shall be run on an equal volume of the water used. Calculate the acidQ or alkalinity of the sample as follows: 4.9 (C-B) N w Acidity as sulfuric acid, percent by weight = 4.0 (A-B) N W Alkalinity as sodium hydroxide, percent by weight = Where: A = mL of H2S04 solutio

36、n required for the titration of sample. B = mL of standard solution required for the blank. C = mL of NaOH solution required for the titration of sample. N = normality of the standard H2S04 or NaOH W = weight of sample in grams 4.5.9 Flexibility. A strip of No. 30 gauge hot rolled steel sheet, 12 by

37、 8 inches, shall be cleaned by washing with benzol and thoroughly dried. It shall be coated on one side to a thickness of 1/16 inch by 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-B MIL-PRF-87895A m 0b 2063457 TL9 m MI L-PRF-87895A( USAF) t flow

38、ing on the molten compound and then cooled at room temperature for a period of 48 hours. With the coating on the outside, bend the test panel rapidly 180“ over a mandrel, one inch in diameter. No cracking of any kind shall be visible after the bending test. 4.5.10 Reactivity. The reactivity of the c

39、ompound in contact with EAK and EALK explosives shall be determined using the vacuum thermal stability test according to 5.5.5, Method 1 of MIL-STD-1751 at 100 10.5 OC (212 Il OF) for 48 hours. 4.5.1 1 Temperature shock. Temperature shock resistance shall be determined in accordance with MIL-STD-81

40、O, Method 503.3. 4.5.12 Temperature and humidity cycling. Temperature and humidity cycling resilience shall be determined in accordance with MIL-STB 331, Method 105.1 except that the test will be modified such that the minimum temperature at any point during the test shall not be below -65 OF. 4.5.1

41、 3 Glass transition temperature. The glass transition temperature shall be determined by thermomechanical analysis. 5. PACKAGING 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual packaging of materiel is to be pe

42、rformed by DoD personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity with the Military Department or Defense Agency, or within the Military

43、Departments System Command. Packaging data retrieval is available from the managing Military or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 6. NOTES (This section contains information of a general or explanatory nature, which may b

44、e helpful, but is not mandatory.) 6.1 Intended use. The hot melt polymeric compound covered by this specification is military unique. It is intended for use as a protective coating for fabricated metal cases in applications where charges of ammonium nitrate based high explosives are melt cast into t

45、he case of a weapon. Such coatings provide a barrier to the corrosive effects of the fill upon the case and a cushion to mechanical impact for the explosive. Additionally, the polymeric material does not contain incompatible components such as copper, nickel, zinc, cobalt and sulfur found in natural

46、 products, and is therefore nonreactive with such explosive fills. This is essential due to the amplification of irreversible growth which results in exudation related maintenance problems of serviceable munitions, rendering them unserviceable. 7 Provided by IHSNot for ResaleNo reproduction or netwo

47、rking permitted without license from IHS-,-,- MIL-PRF-87895A = 999990b 2063q58 955 6.2 Acquisition requirements. Acquisition documents must specify the following: a. Title, number, and date of the specification. b. Issue of DoDISS to be cited in the solicitation, and if required, the specific issue

48、of individual documents referenced (see 2.2). c. When a first article is required. (see 3.1). d. Packaging requirements (see 5.1). 6.3 Subject term (key word) listing. EAK EALK explosives 6.4 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respe

49、ct to the previous issue due to the extent of the changes. 6.5 Materials source. One type of material which satisfactorily fulfills the requirement of Part A is Eastabond G92, a pure amorphous polypropylene, available from Eastman Chemical Products, Inc., Plastics Products Division, P.O. Box 431, Kingsport TN 37662-0431. One type of material that . satisfactorily fulfills the requirements of