DLA A-A-55195-1993 THREAD PARA-ARAMID SPUN INTERMEDIATE MODULUS《中间模帕蜡-芳族聚酰胺纺线》.pdf

1、A-A-55195 9999974 0343292 098 A-A-5 5 19 5 7 April 1993 COMMERCIAL ITEM DESCRIPTION THREAD: PARA-ARAMID, SPUN, INTERMEDIATE MODULUS The General Services Administration has authorized the use of this Commercial Item Description in preference to MIL-T-44100. Abstract. This Commercial Item Description

2、covers spun, para-aramid, intermediate modulus, thread used for machine and hand sewing. The thread is intended for use in sewing aramid materials for construction of protective combat clothing and other flight safety equipment. Type I typifies normal performance thread, whereas, Type II typifies hi

3、gher performance thread for use on end-items that require use of a smaller sized sewing needle. Classification. The thread shall be in the following types: Type I - Normal performance Type II - High performance Beneficial comments (recommendations, additions, deletions) and any pertinent data which

4、may be of use in improving this document should be addressed to: Defense Personnel Support Center, Clothing and Textiles Directorate, Attn: DPSC-FSSD, 2800 South 20th Street, Philadelphia, PA 19101-8419, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end o

5、f this document or by letter. AMSC N/A DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. FSC 8310 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55195 = 9999974 0143293 T24 A-A-55 19 5 e Salient Characteristics. T

6、he staple fibers shall be made from para- aramid filament having a linear density of 1.5 denier per filament, and shall not carbonize at a temperature below 675OF. The color (shade) shall be as specified in the applicable end-item document or in the contract or purchase order. The shade of the end i

7、tem thread, after removal of finish according to AATCC 132, when applicable, shall match the specified applicable shade standard. Unless otherwise specified, the direction of the twist for single ply shall be “S“ and for the plied thread shall be “Z“. The thread shall average not more than one full

8、thread knot per 8 ounces. The thread shall have a soft finish and shall contain only the minimum amount of lubricant to facilitate sewing. Only non-staining and non-flame propagating finishes commonly used shall be permitted as sewing finishes unless prior approval is obtained from the Contracting O

9、fficer. The thread shall be put-up in one continuous length per holder and shall be so wound that each turn and layer are free from entanglement. I Table I Phvsical reuuirements - Type I Nominal Plies Yards/pound Breaking Strength (pounds,min) Elongation Tex Final Min Max Initial After Heat Aging Ma

10、ximum (Natural) (Natural & Dyed) (percent ) 39 2 11,970 13,230 6.0 1.80 6 59 3 7,980 8,820 8.5 3.00 6 78 4 5,700 6,300 12.0 3.25 6 98 5 4,560 5,040 16.0 4.75 6 138 7 3,420 3,780 22.0 6.50 6 6a 118 6 3,990 4,410 19.0 5.75 -_- Table Ia Physical requirements - Type II Nominal Plies Yards/pound Breaking

11、 Strength (pounds,min) Elongation Tex Final Min Max Initial After Heat Aging Maximum (Natural) (Natural & Dyed) (percent) 14 2 31,500 35,000 2.0 0.5 6 16 2 27,700 29,500 3.0 1.0 6 20 2 23,000 25,200 5.0 2.0 6 39 2 11,900 13,200 9.0 3.0 6 59 3 7,980 8,800 14.0 4.0 6 78 4 5,700 6,300 20.0 6.0 6 107 3

12、4,000 4,300 27.0 8.0 6 125 3 3,650 4,000 31.0 9.0 6 142 4 3,100 3,600 35.0 10.0 6 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55195 m 9999974 0143294 960 A-A-55 19 5 Table II End item tests . Characteristic Requirement Test Method . Fiber i

13、dentification Para-aramid spun Number of plies Tables I and Ia Visual Length per pound Tables I and Ia ASTM D1907 Denier per filament 1.5 ASTM D1577 - i/ - 2/ intermediate modulus Melting Point of Synthetic Fibers Above 675O F FED STD 191-1534 - 3/ - 4/ Shade match Colorfastness: Laundering (after 3

14、 cycles) - 5/ Breaking strength Initial Tables I and Ia After heat aging Tables I and Ia 6/ ?/ u/ - AATCC 61 ASTM D2256 - 8/ ASTM D2256 - 9/ - 10/ - i/ i/ - i/ i1/ Elongation Tables I and Ia ASTM D2256 Direction of twist Plied “Z“ ASTM D1423 Single “S“ ASTM D1423 Composition of plastic tubes _-_-_-_

15、-_-_- - i/ Unless otherwise specified, a certificate of compliance shall be submitted and will be acceptable for the stated requirement. One determination per sample unit shall be made and the result reported as pass“ or “fail“. - 2/ - 3/ The shade of the end item thread, after removal of finish, wh

16、en applicable, shall match the specified applicable shade standard. For other shades, address the contracting activity issuing the invitation for bids or request for proposal. Before evaluation for shade matching, the sample of thread shall be wet dry-cleaned in accordance with AATCC 132. Excess sol

17、vent shall be removed by centrifuging or wringin8. The sample shall then be rinsed in distilled water at 120 to 160 F and dried at a temperature not exceeding 180 F. The dried sample shall then be conditioned for a minimum of 4 hours prior to evaluation for shade match. The thread sample shall be wo

18、und or prepared for examination in a manner similar to that for the standard shade sample. The sample shall be compared to the standard sample under artificial daylight at 7000 i500 K and less than a good match shall be a test failure. The sample shall also be compared to the standard sample under i

19、ncandescent lamplight at 2850 +i00 K and less than a good approximation shall be a test failure. - 4/ 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55195 999997V 01V3295 BT A-A-55 195 The dyed and finished thread shall show fastness to launde

20、ring (after 3 cycles) equal to or better than the standard sample. When no standard sample has been established or designated as applicable to colorfastness, the dyed and finished thread shall show a fastness rating of “4“ to laundering (after 3 cycles). O The specimens must be dried after each of t

21、he 3 laundering cycles. The color transfer cloth evaluation shall not apply. At least five determinations shall be made per sample unit. Five specimens shall be used for the heat aging test. The specimens shall be exposed for 4 hours to a temperature of 500 2 10F using a circulating air oven. Upon r

22、emoval, the specimens shall be conditioned at standard atmospheric conditions for 4 hours and then tested for breaking strength as specified in ASTM D1578. To be determined simultaneously with breaking strength. The tubes shall be made of commercially acceptable plastic. Two to six grams of the thre

23、ad, so held together to form a unit &3r testing. Unless otherwise specified in the procurement document, the laundering cycle of the Launder-O-Meter or similar machine shall be 30 minutes and the temperature of the container and its contents shall be maintained at looo +4O F (38O 2 C). Label/markinq

24、. Except when commercial identification markings are specified in the invitation to bid, each holder shall have a label attached in such a manner as to remain in place and be clearly legible until all thread has been removed. The label shall be printed with the information as specified below. Weight

25、 (net) Direction of twist Color Number size Contract number Date manufactured (month and year) Name of contractor Nomenclature Ply Workmanship. After completion, the finished tubes of yarn shall be thoroughly cleaned, and all loose thread, lint, and foreign matter removed. The finished thread shall

26、conform to the quality established by this Commercial Item Description. The occurrence of defects shall not exceed the applicable Acceptable Quality Level (AQL). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55195 W 7777774 OL4327b 733 A-A-5

27、5 19 5 Product Demonstration Model. When required, offerers shall submit samples of their intended production. The Product Demonstration Model will consist of units independently developed. Product Demonstration Models will be analyzed and evaluated by the government. Evaluation criteria and basis f

28、or award are contained in the solicitation. Product Demonstration Models will be retained by the government. One (1) Product Demonstration Model approved by DPSC under the resultant contract will serve as a manufacturing standard for the corresponding production items delivered under this contract.

29、Offerers are advised that the Product Demonstration Model does not relieve the successful offerer of his responsibility to perform in accordance with the Commercial Item Description specified above. Qualitv Assurance Certification. The contractor shall certify that the product offered meets the sali

30、ent characteristics of this description and that the product conforms to the producers own specifications, standards and quality assurance practices. The government reserves the right to require proof of such conformance prior to the first delivery and thereafter as may be otherwise provided for, un

31、der the provisions of the contract. Reliance on contractor QA systems shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the government for acceptance comply with all requirements of the contract. Examination. Yarn tubes of lots shall be ins

32、pected in accordance with “Sampling Procedures and Tables for Inspection by Attributes“, ANSI/ASQC 21.4, published by the American Society for Quality Control. Visual Examination. The thread shall be examined, while unwinding, for the defects listed in Table III. All defects shall be counted regardl

33、ess of their proximity to each other. The lot size for holders shall be expressed in units of one holder and the sample unit shall be one holder. The inspection level for visual examination shall be S-3 and the Acceptable Quality Level (AQL) expressed in terms of defects per hundred units, shall be

34、2.5. Table III Thread as Unwound Defects Examine Defect Continuous length Not in one continuous length. Knots Winding Color Thread on a holder averages more than one thread knot per eight ounces. Improperly or not firmly wound, resulting in kinks, knots, entangling, or slippage during unwinding, or

35、otherwise affecting free unhampered unwinding of the thread. Uneven, apparent on successive layers or end to end. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55195 9999974 0143297 b7T A-A-5 5 1 9 5 Packaaina Examination. Thread on the holder

36、shall be examined for the defects listed in Table IV. The lot size shall be expressed in units of one holder. The inspection level shall be S-3, and the AQL, expressed in terms of defects per hundred units, shall be 2.5. Type of holder Other than specified. Surface condition Loose or unattached ply.

37、 Cut tear, chafe, slip, affecting strength of thread or interfering with easy location of end and initial unwinding. Finish Other than specified. Uneven lumpy, bare or thin spots. . Reaulatorv Requirements. The offeror/contractor is encouraged to use recovered materials in accordance with Public Law

38、 94-580 to the maximum extent practicable. End Item Performance Testinq. The end item shall be tested as indicated in Table II. The methods of testing specified, wherever applicable, shall be followed. The lot size shall be expressed in units of one holder. The sample unit shall be one wound holder

39、or sufficient holders to provide enough thread for the applicable tests. The inspection level shall be S-1, and the AQL for each characteristic, expressed in terms of test failures per hundred units, shall be 2.5. Table V Sample Size for Testinq . Lot size (tubes) Sample size (sample units) 50 or le

40、ss lo 51 to 150 15 151 to 1000 25 1001 and over 25 per thousand . . Preservation, Packina, and Markinq. The preservation, packing, and marking shall be as specified in the contract or order. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-f A-A-551

41、95 9999974 0143298 50b A-A-55 195 Source of Government Documents. Copies of Military and Federal documents are available from: Standardization Documents Order Desk Bldg. 4D 700 Robbins Avenue Philadelphia, PA 19111-5094 Sources of Nonqovernment Documents. ANSI/ASQC 21.4 - Sampling Procedures and Tab

42、les For Inspection By Attributes (Applications for copies should be addressed to American National Standards Institute, 1430 Broadway, New York, NY 10018-3308.) ASTM tests (Applications for copies should be addressed to American Society For Testing and Materials, 1916 Race Street, Philadelphia, PA 1

43、9103.) AATCC tests (Applications for copies should be addressed to American Association of Textile Chemists and Colorists (AATCC), P.O.BOX 12215, Triangle Park, NC 27709-2215. Custodians: Army - GL Navy - NU Air Force - 11 Review Activities: Civil Agency Coordinating Activity : GSA - FSS Preparing Activity: DLA - CT Army - MD Navy - AS Air Force - 20, 82, 99 DLA - CT Project No.8310-O194 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-