DLA MIL-R-43952-1976 ROPE FIBROUS PLAITED POLYESTER POLYPROPYLENE DUAL FIBER《聚脂或聚丙二醇酯双纤维编成的纤维绳》.pdf

《DLA MIL-R-43952-1976 ROPE FIBROUS PLAITED POLYESTER POLYPROPYLENE DUAL FIBER《聚脂或聚丙二醇酯双纤维编成的纤维绳》.pdf》由会员分享，可在线阅读，更多相关《DLA MIL-R-43952-1976 ROPE FIBROUS PLAITED POLYESTER POLYPROPYLENE DUAL FIBER《聚脂或聚丙二醇酯双纤维编成的纤维绳》.pdf（12页珍藏版）》请在麦多课文档分享上搜索。

1、 Preparation for Delivery of STANDARDS FEDERAL FED-STD-191 - Text%le Test Methods Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Natick Research and Development Comand, Natick, MA men

2、t Improvement Proposal (DD Fonn 1426) appearing at the end of this document or by letter. 01760 by using the self-addressed Standardization Docu- FSC 4020 9 THIS DOCUMENT CONTAINS 1% PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-439 52

3、 MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes (Copies of specifications, standards and drawings required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3

4、. REQUIREMENTS 3.1 First article. When specified (see 6.2), the contractor shall furnish a sample for first article inspection and approval (see 4.3 and 6.4). 3.2 Government or contractor purchases. The requirements specified in 3.8, 3.9 and 3.10 apply only to rope purchased directly by the Governme

5、nt. other requirements apply to rope purchased as a component for an end item by a contractor and to rope purchased directly by the Government. A11 3.3 Materials. 3.3.1 Polyester. The polyester portion of the rope shall be bright,.virgin, continuous filament polyester fiber of suitable tenacity to m

6、eet the require- ments of this specification. 3.3.2 Polypropylene. 3.3.2.1 Cover yarn core. 1 The polypropylene for the core of cover yarns shal, be virgin, continuous, monofilament fibers of suitable strength to meet all the requirements of this specification, and shall have a minimum softening poi

7、nt of 300F and a specific gravity no greater than 0.91. size from 100 to 400 denier per fiament and shall contain heat and ultra- violet stabilizers. The fibers shall range in 3.3.2.2 Inside yarns. Inside yarns, when used in construction of the strand (see 3.4.2), shall be virgin, continuous, monofi

8、lament polyproplyene yarns or continuous slit or fibrillated film polypropylene. contain heat stabilizers. required. The polypropylene shall Ultraviolet stabilizers may be used but are not 3.4 Construction. The ropes shall be made of eight strands arranged in four pairs. yarns are used, tiZS“ twist

9、pattern strand pairs shall be alternated with “SZ“ twist pattern strand pairs. patterri strand pairs shall be alternated with iZSZ“ twist pattern strand pairs. Each strand shall be composed of either single ply cover yarns or three ply coveryams. A mixture of strands made up of single ply yarns and

10、strands made up of three ply yarns shall not be permitted in any one rope. may contain polypropylene inside yarns. The alternating pairs shall have opposing twist. Where single cover Where three ply cover yarns are used, “SZS“ twist The strands Provided by IHSNot for ResaleNo reproduction or network

11、ing permitted without license from IHS-,-,-MIL-R-43952 3.4.1 Cover yarns. The cover yarns shall be made with polyester fibers covering a polypropylene fiber core. The cover yarns shall contain a minimum of 50 percent polyester fiber when tested as specified in 4.4.5. ply cover yams are used, each of

12、 the single yarns of the three plys shall be made with polyester fibers covering a polypropylene fiber core and shall con- tain a minimum of 50 percent polyester fiber. When three 3.4.2 Inside yarns, when used. When inside yarns are used in the construction, each strand shall contain a core of polyp

13、ropylene inside yarns as specified in 3.3.2.2. 3.5 Physical requirements. The finished rope shall conform to the physical properties specified in table I when tested as specified in 4.4.5. 3.5.1 Elongation. The elongation of the rope shall not exceed 35 percent when tested as specified in 4.4.5. 3 P

14、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-o rl m rl I m rl O h O O o m rl 4 a rlN aON rlrl II mh rlrl rlrl hg O0 rlrl cv,? O0 mw mm UN rlrl II mrlm Nmm a) m o m N O O o O O m rl 00, h N . U rl I rl U rl U m I m fi rl El O 3 a E 7 O00 NhlN rlrl .

15、 al a El 8f R a k O vi O0 m 2, ?me O00 woa) O O a) O rl c) O vi . a) h a) rl U m I N d O P u 0 QI U k a a O rl w O al Q rl O U 2 8 UN N“ ? 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-R-43752 40 777770b 02Ob844 b MIL-R-43952 3.6 Finish. No

16、 extraneous material shall be added for the purpose of weighing the rope, exceed 4.0 percent when tested as specified in 4.4.5. The extractable matter of the finished rope shall not 3.7 Color. Unless otherwise specified (see 6.2), the color of the rope shall be natural. When colored rope is specifie

17、d the rope shall be dyed to match an approved standard shade of Olive Drab 7 and both the polyester and polypropylene components of the cover yarns shall be dyed (see 6.3). 3.7.1 Colorfastness. Dyed and finished rope shall show fastness to weathering equal to or better than the standard sample when

18、tested as speci- fied in 4.4.5. When no standard sample has been established, dyed rope shall show good fastness to weathering when tested as specified in 4.4.5. 3.8 Identification. Each reel, spool of rope shall have a ticket (identi- fication tag) or label attached to it for identification purpose

19、s. The ticket shali- conform to the requirements for type B, grade 15 SU, size 4 or 5 of UU-T-81. ment that conform to his commercial practice. shall be legibly printed, stamped or typed with insoluble ink. or label shall contain the following information: The contractor shall use attachment method

20、and color require- All ticket or label entries The ticket I r Stock number Color Specification number Length and circumference (size) Contract number and date Date of manufacture (Month and Year) Contractors name 3.8.1 Identification marker. The manufacturer shall identify his product by inserting a

21、 kraft paper or water repellent cotton marker within one strand in all ropes larger than 2 inch circumference. enveloped by the cover yarns in the etrand in which it is inclosed. manufacturers name, year of manufacture and type fiber (Polyester/Polypropylene) shall be clearly printed in block type o

22、n the marker. be affected upon exposure to water or mineral oil. The marker shall be completely The The printing shall not 3.9 Put-up. Unless otherwise specified, (see 6.2) the rope shall be furnished without knots or splices on non-returnable reels or spools not larger than 6 feet in diameter in th

23、e lengths specified in table I. lengths will be permitted, but no piece shall be less than 600 feet when measured in the relaxed condition. squarely and be securely whipped, taped or heat sealed to prevent untwisting or fraying. is free fiom entanglement. Pieced The ends-of all rope shall be cut off

24、 The reels or spools shall be wound so that each turn and layer 5 / Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-43952 3.9.1 Cut lengths. When specified, rope shall be put up in coils in one continuous piece without knots or splices in the m

25、inimum length specified (see 6.2). A plus tolerance of 10 percent shall be allowed on the length per coil. The ends of all rope shall be cut off squarely and be securely whipped, taped or heat sealed to prevent untwisting or fraying. shallbe so wound that each turn and layer is free from entanglemen

26、t. The coils 3.10 Moisture content. The moisture content of the rope, as received, shall not exceed 2.0 percent when tested as specified in 4.4.5 (see 6.5). 3.11 Spliceability. The finished rope shall be spliceable and shall not develop yarn displacement or strand cockles in the splicing test specif

27、ied in 4.4.5. 3.12 Workmanship. The rope shall conform to the quality and grade of product established by this specification. not exceed the applicable acceptable quality levels established by this specification. The occurrence of defects shall 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for

28、inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract, the contractor may use his own or any other facilities suitable for the performance of the insp

29、ection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. I 4.1.1 Certi

30、ficate of compliance. When certificates of compliance are submitted, the Government reserves the right to check test such items to determine the validity of the certification. 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: . 1. First article

31、 inspection (see 4.3). 2. Quality conformance inspection (see 4.4). 4.3 First article inspection. Uhen required (see 6.2), the first article submitted in accordance with 3.1 shall be visually inspected for appearance and color. The sample shall be tested for physical and chemical character- istics i

32、n accordance with 4.4.5. 6 I -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-43 9 5 2 4.4 Quality conformance inspection. Except as otherwise specified herein, sampling for inspection shall be performed in accordance with the provisions set-

33、 forth in MIL-STD-105. 4.4.1 Component and material inspection, In accordance with 4.1 above, com- ponents and materials shall be inspected in accordance with all requirements of referenced specifications, drawings and standards unless otherwise excluded, amended, modified or qualified in this speci

34、fication or applicable purchase documents. table II and a contractors certificate of compliance thereto shall be furnished and will be accepted for the requirements. In addition, inspection shall be performed for the requirements in TABLE II, Characteristics Paragraph reference Material 3.3 r Single

35、 yarn in strand (when applicable) Plied yarn in strand (when applicable) 3.4.1 3.4.1 4.4.2 End item inspection. The defects listed in table III shall be counted regardless of their proximity to each other. The sample unit shall be one reel, spool or coil as applicable. sample unit, but not less than

36、 100 feet shall be subjected to the visual examination. reels, spools or coils each. 1.5 major defects and 4.0 total defects (major and minor combined) per 100 units. The inspection level shall be level I. Ten percent of the length contained on each The lot size for ,this examination shall be expres

37、sed in units of The acceptable quality level (AQL) shall be TABLE III. Visual examination defects Classification Examine Defect Major Minor Appearance and Cut, any X wo rkmansh ip Chafed or damaged X strand or yarn splice X Kink, darting yam &/, broken or loose end, bulged strand, strand knot, 7 Pro

38、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE III. Visual examination defects (contd) Classification Examine Defect Major Minor Appearance and Ends not cut off squarely workmanship Ends not securely whipped, taped or heat (cont d) sealed Identif

39、ication Omitted, incorrect, or illegible Insecurely attached or not as specified Color (dyed rope) Not as specified Resists dyeing or spotty dyeing Specific shade not within established Uneven tolerances X X X X X X X X X Cleanness Spot, or stain, clearly noticeable z/ - i/ Darting yarn is an intern

40、al yarn which projects through the surface of the strand. - 21 At normal inspection distance (approximately 3 feet). 1 4.4.3 Examination for length and winding. The sample unit for this examina- tion shall be one reel, spool or coil. S-3 and the AQL shall be 4.0 percent defective. number of units in

41、 the inspection lot. and 4.4.3.2. 3.9.1) shall be calculated using the following formula: The inspection level shall be level Defects shall be as listed in 4.4.3.1 The required length of the reel, spool or coil (see table I and The lot size shall be the W x L = Length per reel, spool or coil Where :

42、 W is net weight of the rope in 0.1 pounds L is the lot average of the weight-length relationship (length per pound) as determined in 4.4.5 4.4.3.1 Length. Defects with regard to length shall be considered to exist if any of the following are determined during inspection: a. Length of reel, spool or

43、 coil less than specified. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-43752 40 9 7777706 OLOb4 3 - I f MIL-R-439 52 b. Length of unit less than marked on ticket. c. Rope not in continuous length when specified (see 3.9.1). d. Any piece o

44、n reels or spools less than 600 feet in length. 4.4.3.2. Winding. Defects with regard to winding shall be considered to exist if any of the following are determined during inspection: a. Improperly or not firmly wound resulting in kinks, knots, entangling or slippage during unwinding or otherwise af

45、fecting free unhampered unwinding of rope. b. Knot or splice or otherwise joining of ends to make a continuous length. 4.4.4 Packaging inspection. Packaging, packing and marking shall be inspected % in accordance with the provisions of MIL-C-3131, except that the inspection levei shall be S-2 and th

46、e AQL shall be 2.5 defects per 100 units. I 4.4.5 Testing of the end item. The methods of testing specified in FED-STD-191, wherever applicable, and as listed in table V shall be followed. The physical and chemical values specified in section 3 apply to the average of the determinations made on a sa

47、mple unit for test purposes as specified in the applicable test methods. table IV. The lot size shall be expressed in units of one reel, spool or coil. reports shall contain the individual values utilized in expressing the final result. The lot shall be unacceptable if one or more units fail to meet

48、 any requirement. Tests to determine compliance with specification requirements, including quantity of delivery, may be made under prevailing atmospheric conditions. reached equilibrium under standard conditins as defined in FED-STD-191. The sample size shall be in accordance with The sample unit fo

49、r testing shall be one reel, spool or coil of rope. All test c In cases of dispute, tests shall be made upon material which has TABLE IV. Sampling for tests Acceptance No. Rejection No. No. of reels, spools No. of for each test for each test or coils in lot samples characteristic characteristic Up to 25 -2 O 1 26 to 150 3 O 1 151 to 1200 4 O 1 1201 and over 7 1 2 Provided b