1、MIL-W-BOC 73 7779706 0113314 1 m 7 such as incomplete closures of case liners, con- tainer flaps, loose or inade- quate strappings, bulged OP distorted containers. Count Case liners missing or not as specified when required. Less than specified or indicated quantity. Weight Gross weight exceeds spec
2、ified requirements. Markings Interior or exterior markings omitted, illegible, incorrect, in- complete, or not in accordance with contract requirements. 4.2.3.1.4 Inspection levels and acceptable quality levels (AQLs) for examinations. The inspection levels for determining the sample size, and the a
3、cceptable quality levels (AQLs) expr.essed in defects per 100 units, shall be as follows : Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-U-8OC 73 .7777706 0123318 7 U Ezaminatwn Inspectwn pawgrap h level A QL 4.2.3.1.1 I 1.5 4.2.3.1.2 s-3 2.5 4
4、.2.3.1.3 s-2 4.0 4.2.4 Sampling f or tests. Representative samples shall be taken at random from each lot that passes the examination specified in 4.3.1 in sufficient quantity to conduct the production check tests or the quality con- formance tests specified in 4.3.3 and 4.3.4, as applicable. If the
5、 items are of such size or shape that test specimens cannot be pre- pared from them, a substitute sample shall be provided in the form of a piece or pieces of plastic sheet or strips having dimensions appropriate for the tests required. The sub- stitute samples shall be certified to be of the same m
6、aterial and properties as that in the lot of finished material offered for delivery. 4.3 Quality conformance examination and tests. 4.3.1 Examination. Each of the sample plastic pieces selected in accordance with 4.2.2 shall be examined visually for form, dimensions and tolerances, iden.tification,
7、and workmanship. 4.3.2 Rejection. If the number of defects exceed the applicable acceptance number, this shall be cause for rejection of the entire lot represented by the sample. 4.3.3 Production check tests. Production check tests shall be conducted on samples from (or representing) one out of ever
8、y 5 lots. All the tests specified in. 4.4 shall be conducted, using three specimens for each test, The results of each test shall be aver- aged. 4.3.4 Quality conformance tests. Quality conformance tests shall be conducted on sam- ples from (or representing) all lots on which MIL-W-SOC production ch
9、eck tests were not conducted. The test specified in 4.4.5 (see 3.5), after conditioning at low humidity (see 4.4.4.2) only, shall be performed. Three specimens shall be tested. 4.3.5 Action in case of nonconformance, If any sample in the production check tests or quality conformance tests is found n
10、ot to be in conformance with the requirements of this specification, this shall be cause for rejec- tion of the lot which it represents. Further- more, additional samples shall be taken or provided from each subsequent lot and shall be subjected to the test or tests wherein the failure occurred. Eac
11、h lot shall then be accepted only after satisfactory results are obtained on the test or tests by all the sam- ples taken or provided to represent the lot. This additional testing shall be discontinued after four successive lots have passed the test or tests. 4.4 Methods of tests. 4.4.1 Standard atm
12、ospheres. U n 1 e s s otherwise specified herein, conditioning and testing shall be conducted at 73.5“ k 2F. (23.1 c 1.1“C.) and 50 plus or minus 4 percent relative humidity. 4.4.2 Specimen pyeparation and position- ing for testing. Unless otherwise specified herein, specimens shall be machined from
13、 sheets, strips, or windows to length and width tolerances of plus or minus 5 percent. Before testing specimens shall be wiped with a clean, dry cloth ; subsequent contamination of the surface by dust or fingerprints shall be avoided. Specimens shall be tested with the untreated surface, if any, fac
14、ing the testing action. 4.4.4 Cofaditioning. 4.4.4.1 Ref erence. Specimens shall be ex- posed for not less than 48 hours to the condi- tions specified in 4.4.1. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RIILW-80C 4,4.4,2 Low hzcmiclity. Speci
15、mens shall be exposed for not less than 48 hours to a tem- perature of 73.5“ -k 2OF, (23.1“ 2 l.lC.) and a relative humidity of 10 plus or minus 2 percent, The measurement of electrostatic dispersion (4,4.5,4) shall be conducted at these conditions, 4,4,4,3 Hzmltp cyclifig, Specimens shall be kept f
16、or 6 hours at a temperature of 140.0“ -t- 2OP. (45.0“ I l.lC.) and a rela- tive humidity of 95 plus or minus 2 percent. The heat and humidity controls shall then be turned off and the specimens permitted to cool for 18 hours. This procedure shall he repeated three times, whereupon the spec- imens sh
17、all be removed. Care shall be taken to avoid damage to the antielectrostatic treatment, if present. The specimens shall he gently blotted with a clean damp cloth or sponge, They shall then be conditioned as specified in 4.4.1 for at least one hour before optical testing and for at least 24 hours be-
18、 fore testing for electrostatic dispersion. 4,4,4.4 Accelerated aging. The applicable provisions of method 5660 of CCC-T-191 shall be used. Exposure time shall corre- spond to 75 standard fading hours. Before further testing, the specimens shall be wiped with a clean cloth. 44.5 Electyostatic dispey
19、sion. 4.4.5.1 Spechiens. The specimens shall be four-inch squares, or, if smaller, the ac- tiid window size. 4.4.5.2 Appamtus, The appasatus shall consist of a motor which imparts a 2 inch forward and backward stroke at 100 cycles per minute to a connecting link and of an assembly for generating and
20、 measuring elec- trostatic charges, shown diagrammatically in figure I. The component parts shall be as follows : (a) Rubbing pad. The rubbing pad shall be 1l,L! by 2y inches and of such height as to weigh 2 pounds. It shall be pivoted at the shorter sides and connected by another pivot joint to the
21、 connecting link in such a manner that it can be lifted away from the specimen, when desired. The pad shall be grooved on all sides to hold the rubbing cloth by means of a rubber band, The cloth shall be made of cotton. (b) Specimen mounting stand. The stand shall consist of a square frame of 5y2 in
22、ches outside and 3$4 inches inside length. It shall be constructed of metal, pre- ferably brass. The position of the stand and its height, in rela- tion to the connecting link, shall be such that the rubbing pad is centrally located on the specimen at the midpoint of the stroke, and makes full conta
23、ct with the speci- men during the entire stroke. For specimens smaller than 4 by 4 inches, metal strips, less than 1/16-inch thick, shall be installed on the frame to fix the position of the specimen symmetrically over the frame opening, The specimen shall be attached to the frame by means of commer
24、cial type spring clips, (c) Electyostatic yeceivitiy plate. The plate shall be 3% inches square and shall be contructed at thin but rigid metal. The plate shall be electrically isolated from all parts of the stand (see 4.4.5.2 (b) and shall be mounted at its center by means of a counter- sunk screw
25、to an insulator (see 4.4.5.2td) parallel to and at a Type FDA-R Fade-ometer, manufactured by Atlas Electrical Devices Company, Chicago, Illinois, or equivalent, is suitable. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W- however, after wrap
26、ping w it h polyethylene, additional wraps of soft, nonabrasive paper may be utilized for physical protection or cushion- ing purposes if required. . 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-5.1.12 Unit contuiners. Plastic sheets, strips, or
27、 windows, in the quantity speci- fied (see 6.2), shall be further packaged in R fiberboard box conforming to PPP-B-636. Closure and sealing shall be in accordance with the applicable container specification, 5.1.2 Level C. Packaging shall be suffici- ent to afford adequate protection against deterio
28、ration ancl physical damage during shipment from the supply source to the first receiving activity for immediate use or for controlled humidity storage. This level may conform to the suppliers commercial prac- tice when sirch meets the requirements of this level. 5.2 Packing. Packing shall be level
29、A, B, or C, as specified (see 6.2). 5.2.1 Level A. Antielectrostatic plastic sheets, strips or windows, packaged as speci- fied in 5.1.1, shall be packed int fiberboard boxes conforming to any one of the following specifications at the option of the supplier : PPP-B-636 Weather-resistant class PPP-B
30、-640 Class 2 !L2.101 All center and edge seams and manufacturers joint of fiberboard boxes shall be sealed and waterproofed with pres- sure sensitive tape in accordance with the applicable fiberboard box specification, Ship- ping containers shall be closed and banded (reinforced with pressure-sensit
31、ive tape) in accordance with the applicable box specifica- tion or appendix thereto, The gross weight of shipping containers shall not exceed the weight limitations of the applicable box specification, When specified (see 6.2), unit fiberboard containers conforming to weath- er resistant class of PP
32、P-B-636 closed, sealed and banded as specified herein may be used as the shipping container and need not be overpacked. 8 5.2.2 LeTel B. Antielectrostatic plastic sheets, strips or windows, packaged as speci- fied in 5.1, shall be packed in fiberboard boxes conforming to any one of the following spe
33、ci- ficatiocs at the option of the supplier : Specificutioit Class PPP-B-636 Domestic class PPP-B-640 Class 1 5.2.2.1 Shipping containers shall be closed and banded in accordance with the applica- ble container specification or appendix there- to, Fiberboard containers may be sealed with PPP-T-45 ta
34、pe. The gross weight of shipping containers shall not exceed the weight limitations of the applicable box specification. Unit fiberboard containers conforming to PPP-B-636, closed and band- ed as specified herein, may be used as the shipping container and need not be over- packed. 5.2.3 Level C. Ant
35、ielectrostatic sheets, strips, or windows, packaged as specified in 5.1.2, shall be packed to insure acceptance by common carrier at the lowest rate ancl will afford protection against physical and mechanical damage during direct shipment from the suppIy source to the first receiving activity for im
36、mediate use. The shipping containers or the method of packing shall conform to the Uniform Freight Classifica- tion Rules and Regulations as applicable to the mode of transportation and may be the suppliers commercial practice when such meets the requirements of this level. 5.3 Marking. In addition
37、to any special marking required (see 6.2), interior pack- ages and exterior shipping containers shall be marked in accordance with MIGSTD- 129. 6. NOTES 6.1 Intended use. The materials covered by this specification are intended for use as Provided by IHSNot for ResaleNo reproduction or networking pe
38、rmitted without license from IHS-,-,-9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILW-80C 8 a O 3 w (o a m 3 a 8 z O 10 * U. 0. GOVERNMENT PRINTING OFFICE: 261-070-1966-(X-131) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
