DLA L-P-516 A-1967 PLASTIC SHEET AND PLASTIC ROD THERMOSETTING CAST《铸件热硬化性的塑料层和钻杆》.pdf

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1、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILSTD-129-Marking for Shipment and Storage, (Copies of Military Specifications and Shndards required by contradora in eonnection with specific pimurement functons should be obtained from the procuring

2、activity or ria directed by the contracting officer.) 3. REQUIREMENTS 3.1 Material, The material shall be cast thermosetting resins so formulated and proceased aa to meet the rquirements of this specification. 3.1.1 Cluritg. The material shall be color- less, transparent, translucent, or opaque, as

3、specified (see 6.2). 3.1.2 Form The material shall be sheets, rods, tubes, or other forms, as specified, with the dimensions specified (see 6.2). 3.1.2.1 Dimensionab tolerance on sheets. 3.1.2,l.l Length and width. The length and width of untrimmed sheets may vary 1 inch over or under the manufactur

4、ers standard size. The length and width of trimmed sheets shall be within plus 0.260, minus 0.000-inch of the nominal size. Meas- urements to determine length and width shall be made at 23 vary from the normal by a value greater than 125 percent of the specified variation. 3S.2.2 Dimemional toleranc

5、e on rods ad tzibes. The tolerance on rods and tubes shall be as follows: Dimension Tolerance Length -t- 1 inch Diameter shall not have any cracks, breaks, bubbles, wrinkles, scratches, dents, or ragged edges; and shall be clean cut. 3.2 Property values. When specimens are tested as specified herein

6、, the values ob- tained from each set of specimens for a specific property, after each conditioning procedure specified in table I, shall be aver- aged, and the results so obtained shall meet the required values specified in table I, 4. QUALITY*ASSURANBE PROVI- SIONS 4.1 Responsibility for inspectio

7、n. Unless otherwise specified in the contract or pur- chase order, the supplier is responsible for the performance of all inspection require- ments as specified herein. Except as other- wise specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Governm

8、ent. The Govern- ment reserves the right to perform any of the inspections set forth in the specifica- tion, where such inspections are deemed necessary to assure that supplies and serv- ices conform to prescribed requirements. 42 Sampling for quality conformance in- spection. Sampling for quality c

9、onformance inspection shall be performed in accordance with the provisions set forth in MIL-STD- 105, except where otherwise indicated here- inafter. For purpose of sampling, an in- spection lot for inspection and tes clm not accomplished by specified or required methods or materiais. Any nonconform

10、ing component, component missing, damaged, or otherwise defective, affecting serviceability. Inadequate application of com- ponents such as incomplete closure of case liners, container flaps, loose or inadequate strapping, bulged or distorted containers. Less than specified or indicated quantity. In

11、terior or exterior markings (ae applicable) , omitted, illegible, incorrect, incomplete or not in accordance with contract requirements. Gross or net weight exceeds Specified rqirementa. packaged as specified. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from

12、IHS-,-,-L-P-5LbA 73- 779777q 0007320 3 m 4.3.1.1.4 Impectwn levels an no special conditioning. B-Immersion conditioning in distilled water. E-Temperature conditioning. Des-Desiccation conditioning; cooling over silica gel oy calcium chloride in a desiccator at 23O C. for 16 to 20 hours. 4,4.2,3,2 Fr

13、ocedwes. The conditioning procedure required, with the exception of conditions A and des, shall be indicated by the following combination of symbols: (a) A capital letter specifying the type of conditioning. (b) A number indicating in hours the dura4ion of the conditioning. (e) A number indicating i

14、n degrees cent- grade the conditioning temper- ature. The numbers shall be separated from each other. by a slant mark, and from the capital letter by a dash. A sequence of conditions shall be denoted by the use of a plus ( +) sign betweefi the successve* conditions. * 4.4.2.3.3 Time tolerames. Condi

15、tioning2 time tolerances and additional testing in- formation shall be as specified in table V. 4.43 Apparatus and procedure. The ap- paratus and procedure shall be as specified in the method of test, and as modified hera- in. 4.48.1 Water absorption. The test speci- mens shall be tested in accordan

16、ce with pro- cedure A, immersion in water for 24 hours, except that the conditioning period shall be 48 hours at 50 C. 4.4.3.2 Dielectrzc strength (f lathe). l!he test shaII be made under oil at a frequency Test humidity, Conditioning-time tolerance temperature, Ctmlitioning procedure 1/ D-48/50 f D

17、-%/23 E-48/50 4- dCS -t. D-24/23 (for water absorption). Oven or + 2, -0 hr. E-1/75 1, -0 lir. i I Hot water _- water tolerances -I- + 2, -O hr. + 2, -0 hr. 23“ + 1.1“ C., 50 -t. 4 per- cent RH - 75“ -i- 2“ c. Remarks N Start test 2 minutes after removing specimens from final conditioning bath. stre

18、ngth without removing speciitiens from the oven. Measure fIexural I/ After immersion conditioning, surface water shall be removed by wiping the specimen with a damp cloth, followed by wiping with a dry cloth t Provided by IHSNot for ResaleNo reproduction or networking permitted without license from

19、IHS-,-,-L-P-516a not exceeding 100 cycles per second. The electrodes shall be metal disks 2 inches in diameter and 1 inch in length with the edges rounded to a radius of 1/4 inch. The test specimens shall be disks, 4 inches in di- ameter by 1/8 inch in thickness. 4.4.3.2.1 Short-time test. The volta

20、ge shall be increased uniformly at the rate of 500 volts per second. 4.4.3.2.2 Step-by-step test. The voltage shall be increased by the increments speci- fied in table VI. It shall be held at each step for 1 minute and then changed to the next higher one within 10 seconds. This process shall be cont

21、inued up to failure. Table VI. Voltage increment for step-by-step test Breakdown by short-the method Increment Kilovolts Kilovolts 12.5 or less 0.5 Over 12.6 to 25, incl. 1.0 Over 25 to 50, incl. 2.6 Over 50 to 100, incl. 5.0 Over 100 10.0 4.4.3.3 Dielectric breakdown. The test shall be made under o

22、il at a frequency not exceeding 100 cycles per second. Electrodes shall be American Standard No. 3 tapered pins or equivalent. The test potential shall be applied between the pair of electrodes when inserted successively in the numbered holes of the test specimen illustrated in fig- ure 1, and the a

23、verage of the three readings shall be taken as the reading for the speci- men. 4.4.3.3.1 Short-time test. The voltage shall be incseased uniformly at the rate of 500 volts per second. 4.4.3.3.2 Step-by-step test. The voltage shall be increased by the increments speci- fied in table VI, It shall be h

24、eld at each step for 1 minute and then changed to the next higher one within 10 seconds. This process shall be continued up to failure. 4.4.3.4 Dielectric constant and dissipation factor. For tests at 1 kilocycle, a three-elec- trode system shall be used on specimens 1/8-inch in thickness by either

25、4 inches in diameter, or 4-inches square. For tests at 1 and 30 megacycles, a micrometer electrode holder shall be used on disk specimens, 2 inches in diameter by l/8-inch in thickness. 4.4.3.5 Flexural strength. From each test unit, two sets of three specimens each shall be tested. One set shall be

26、 conditioned and tested in accordance with 4.4.1, and one set shall be conditioned for a period of not less. than 1 hour, nor more than 2 hours, at 75O f Z0 C. (167O 3. 3.6O F.), in a circulating air oven, and tested at that temperature without removing the specimens from the oven. 4.4.4 Accuracy of

27、 calculutons. Observed or calculated values shall be rounded off to the nearest digit in the last right-hand place of figures used in expressing the specified value, except as follows: (a) From 500 to 1,000, incl. - to the (b) From 1,001 to 10,000, incl. - to the nearest 5. nearest 100. 5. PREPARATI

28、ON FOR DELIVERY 5.1 Preservation and packaging. Preser- vation and packaging shall be level A or C, as specified (see 6.2). 5.1.1 Level A. Plastic sheets and plastic rods and tubes shall be preserved and pack- aged in accordance with method III of MIL- P-116. Individual sheets shall be covered on bo

29、th surfaces by a suitably adhered paper that can be readily removed without injury to the surfaces. Rods and tubes shall be individually wrapped or otheswise separated to protect them from abrasion. 5.1.2 Level C. Preservation and packag- ing shall be sufficient to afford adequate protection against

30、 deterioration and physi- cal damage during shipment from the sup- ply source to the first receiving activity for immediate use. This level may conform to 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-the suppliers commercial practice when such m

31、eets the requirements of this level. 5.2 Packing, Packing shall be level A, B, or C, as specified (see 6.2). 62,l Level A. 5.2,Ll Plastic sheets. Two, five, or ten plastic sheets, as specified (see 6.2), pack- aged as specified (see 6.2), shall be pack- ed in accordance with 5.2.1.2. 521.2 Phtic roh

32、 and tubes. Plastic rods and tubes, packaged as specified (see 6.2), shall be packed in a close-fitting container conforming to PPP-B-585, class 3; PPP- 3-591, class II; PPP-B-601, overseas type; PPP-3-621, class 2; PPP-B-636, class weather-resistanQ or PPP-B-840, class 2, grade A. The shipping cont

33、ainers shall be closed, strapped or banded in accordance with the applicable container specification or appendix. The gross weight of the triple- wall box or the wood boxes shall not exceed 200 pounds. The gross weight of the PPP- B-636 box shall not exceed the box specifi- cation limitations, 512 L

34、evel B. 5,22,1 Plastic sheets. Two, five, or ten plastic sheets, as specified (see 6.2), pack- aged as specified (see 6.2), shall be packed in accordance with 6.2.2.2, 5.2.2.2 Pk8t.iC rods ad tubes. Plastic rods and tuba, packaged as specified (see 6.2), shall be packed in ciose-fitting shipping con

35、- tainers conforming to PPP-E!-585, class 1; PPP-B-591, class I; PPP-B-601, domestic type; PPP-l3-621, class 1; or PPP-B-636, class domestic. Closure shall be in accord- ance with the appendix to the container specification. The gross weight of the wood boxes shall not exceed 200 pounds. The gross w

36、eight of the PPP-B- box shall not exceed the box specification limitations. 5,2,3 Level C. Plastic sheek and plastic rods and tubes, packaged as specified (see 6.2), shall be packed in mnMnem at the Iotvest rates, to insure acceptance by com- mon carrier and will afford protection against physical o

37、r mechanical damage dur- ing direct shipment from the supply source to the first receiving activity for immediate use. This level shall conform to regulations as applicable to the mode of transportation and may be the suppliers commercial prac- tice when such meets the requirements of this level. 52

38、.4 Genera, Insofar as possible and practical, exterior containers shall be uni- form in shape and size, and shall be of mini- mum cube and tare consistent with the pro- tection required. 5.3 Marking, 5.3.1 Civil agemies. In addition to any special marking specified in the contract or order, shipping

39、 containers shall be marked in accordance with Fed, SM. No. 128. 5.3.2 Military agedes. In addition to any special marking required by the contract or order, unit packages, intermediate packages, and exterior shipping containers shall be marked in accordance with MIGSTD-129 (see 6.2). 6. NOTES 6.1 I

40、ntended use. 6.1.1 Tgpe G-1 (alMd copolymer). Parts machined from this material are intended for general usage. They possess good ma- chinability, excellent abrasion resistance, and high heat resistance. Models made from this material may be used for the optical study of stress distribution. 6.12 Ty

41、pe 6L9 (aUyZ). Parts machined from this material are intended for general usage. They have good optical properties, good loss factor, high dielectric strength, and high resistivity; however, care must be taken in machining and handling. 6.1.3 Type E-9 (cross-lit ALL DIMENSIONS IN INCHES Figure 1, Specimen for dielectric-breakdom test. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-