1、MIL-P-25375B 73 777770b OlL7Lh7 O m Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Engineering and Standardization Department (Code 931, Naval Air Engineering Center, Lakehurst, NJ 08733, by us
2、ing the self-addressed Standardization Document Improve- -ment Proposal (DD Form 1426) appearing at the end of this document of by letter. Systems MIL-P-253958 25 March 1986 SUPERSEDING MI L-P-25395A(ASG 23 December 1963 MILITARY SPECIFICATION PLASTIC MATERIALS, HEAT RESISTANT, LOW PRESSURE LAMINATE
3、D, GLASS FIBER BASE, POLYESTER RESIN This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers glass fiber base, polyester resin, low pressure laminated plastic material used for airframe structural parts, inclu
4、ding external parts, and other applications. 1.2 Classification. The laminated plastic materials shall be classified by the fabric number or mat as specified in Tables I and II and by type as fol lows: Type I - Nonelectrical Type II - Radio frequency Type III - Radar frequency 1.3 Part Number. The m
5、aterials furnished under this specification shall be identified by part numbers consisting of the “M“ prefix and specification number followed by a one digit type designation and an eight digit dash number consisting of sheet thickness in inches, sheet width in inches, and sheet length in inches as
6、shown in the following example. AMSC NIA FSC 9330 DISTRIBUTION STATEMENT A, Approved for public release; distribution is unlimited. THIS DOCUMENT CONTAINS 16 PAGES. -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-P-253956 This number is inten
7、ded for cataloging and ordering purposes. M25395 Specification i denti fi er Type I - 1 Type II - 2 1 II Type III - 3 Sheet thickness in inches (decimal). e,g., ,400 inches thick (1 .OZ centimeters) Sheet width in inches I e.g, 24 inches wide (61,O centimeters Sheet length in inches . 6.g, 36 inches
8、 long (91.4 centimeters) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specificaions and standards. Unless otherwise specified, the followins sDecifications, and standards of the issue listed in that issue of the Department of Defense Index of Speciftcations and Standards (DODISSI specifie
9、d in the solicitation form a part of this specificttion to the extent speclf ied. herein. v SPECIFIATIONS -. MILITARY 4i- a MIL-69084 - %CFoth, Glass, Finished, For Resin Laminates Aircraft Structural MIL-P-9400 - Plastic Laminate and Sandwich Construction Parts, MIL-R-25D42 - Resin, Polyester, High
10、 Temperature Resistant, Low MIL-M-43248 - Mats, Reinforcing, Glass Fiber r . - Pressure Laminating . 2 E n rr) O CI n m 7 v r o Cc, .I- Id E rL .O Ob O +% O- mw NO -x .al LVI Ol- bal C ala LP ow alu c,Id lnc *U F5 .I- .r VII- al .I- r c,aJ LI- all- PId OL LId na 4 I4 I ;o -N- N N a mwwaN NNNd- n Id
11、C% XL*C I4 I amm oomco com mo bed- mmd-d- *CON O00 tu-O “13. I .I- nn I Id n a I rr)rr)rr) rr)minu) v)rr)rr)oca mmm mwm mmmh- VIU aJL =la I-u CdC Id c, alvi VI al% SC +Id .- - irr) WWN L al 9 z O L 9 Id Li. 5 .i- H H W J m ;i * O00 VI .I- u s ou u o uc CO 14 Provided by IHSNot for ResaleNo reproduct
12、ion or networking permitted without license from IHS-,-,-MIL-P-25335B 73 m 373770b 0117181 5 MI L-P-25395B TABLE V. Visual inspection Exami ne Shape Appearance Make-up Warp or twist (flat laminated sheets) Foreign material Workmanship Defect Not shape specified. Finish not as specified, not uniform.
13、 Not laminated as specified. Overlaps less than 0.5 inch (12.7mm). with resin overlay or thick resin surface. Laminations gap. Made In excess of that specified in 3.7. Embedded foreign material (other than fibrous glass). other contaminants. Surface dirt, parting material, or Cracks, scratches, hole
14、s, blisters, wrinkles, tacky surface, resin-starved or porous areas, resin pockets, chipped or broken parts. Rough surfaces, rough edges. Sheets delaminated, unbonded, or containing air pockets. Patches except when specifically permitted as allowable defects. TABLE VI. Dimensional inspection Exami n
15、e Defect Length or width Varies by more than 0.5 inch (12.7 mm) or by more than the tolerances indicated in drawings or contract requirements, as applicable. in drawings, specifications, or contract requirements. Unless otherwise specified, the thickness-tolerance for sheets in 3.11.1.1 shall apply.
16、 Thickness Varies by more than the tolerances indicated TABLE VII. Quality conformance mechanical 81 physical inspection Property Requirement I/ Speci f i c gravi ty Resin content Barco1 hardness Tensile strength Compressive strength (tested wet, after immersion) Flexural strength Flexural modulus o
17、f elasticity Tested at 260C (500F) after 112 hour 260F 3.8.1 3.8.1 Table II & III Table II 3 III Table II & III Table II & III1 - 1/ Refer to Table IV for test method and number of specimens to be tested. I5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
18、S-,-,-TABLE VIII. Examination of preparation for dei ivery Exami ne Packaging Packing Count Weight Markings Defect Not level specified in contract requirements. Not individually wrapped or interleaved, when specified. Packaging material not as specified. Not level specified in contract requirements.
19、 Arrangement not as specified. liners missing or not as specified. nonconforming packing component, component missing, damaged or otherwise defective affect- ing serviceability. Specified pads or Any Closure not as specified. Less than specified or indicated quantity. Gross weight exceeds specified requirements. Interior or exterior markings (as applicable) omi t ted , i 1 1 eg i bl e, i ncorrec t + i ncomp 1 e te, or not in accordance with contract requirements. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
