1、Q i MIL-T-43b24B 3 W 9999906 OYb9b7b b W 1 INCH-POUND I MIL-T-43 624B 20 February 1991 SUPERSEDING MIL-T-43 6 2 4A 22 January 1982 MILITARY SPECIFICATION THREAD, POLYESTER, SPUN This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE AND CLASSIFI
2、CATION 1.1 Scope. This specification covers one type of thread made of spun, cut staple polyester fibers for machine sewing. 1.2 Classification. The thread size (ticket number and ply) shall be as specified (see table I and 6.2). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications
3、, standards, and handbooks. The fo,owing specifications, standards, and handbooks forin a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (
4、DODISS) and supplement thereto, cited in the solicitation (see 6.2). I 1 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be used in improving this docunent should be addresseci to: U.S. Army Natick Research, Development, and Engineering Center, Natick, MA
5、 01760-5019 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8310 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking per
6、mitted without license from IHS-,-,- MIL-T-43624B 83 9999906 0469b77 8 = MIL-T-43624B SPECIFICATION FEDERAL PPP-P-50 - Packaging and Packing of Thread for Domestic and Overseas Shipment STANDARDS FE DE FL4L FED-STD-19 1 - Textile Test Hethods MIL ITARY MIL-STD-105 - Sampling Procedures and Tables fo
7、r Inspection by At tributes MIL-STD-129 - Marking for Shipment and Storage (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.)
8、2.2 Non-Government piiblications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issiies of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the
9、 issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). American Society for Testing and Materials (ASTM) Standards D 3951 - Standard Practice for Commercial Packaging (Applications for copies should be addressed to the American Society for
10、Testing and Naterials, 1916 Race Street, Philadelphia, PA 19103-1187.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational service
11、s.) 2.3 Order of precede.nce. in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2 Provi
12、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*-. . b7 MIL-T-43b24B 83 m 9Ob 0469678 T m MIL-T-43 624B 3. REQUIREMENTS 3.1 First article. When specified (see 6.21, a sample shall be subjected to first article inspection (see 6.31, in accordance with 4.3
13、. 3.2 Government and contractor purchases., The requirements specified in 3.10, 3.11, 3.12 and the related provisions of section 4, and all of section 5 apply only to thread purchased directly by the Government. apply both to thread purchased by a contractor as a component for an end item and to thr
14、ead purchased directly by the Government. All other requirements 3.3 Standard sample. When a standard sample is established (see 6.4), the thread shall match the standard for shade and shall be equal to or better than the standard sample with respect to all characteristics for which the standard is
15、referenced. 3.4 Material. It is encouraged that recycled material be used when practical as long as it meets the requirements of this specification. 3.4.1 - Yarn. (polyethylene glycol terephthalate) having a specific gravity within the range of 1.36 to 1.40 The yarn for this thread shall be spun fro
16、m cut-staple polyester 3.4.1.1 Polyester. The use of any form of polyester waste is prohibited, such as, undrawn fiber, mixtures of denier, luster, cross sections and waste from any stage of fiber production; whether drawn, undrawn mixed or garnetted fiber. The contractor shall certify that each lot
17、 of polyester staple used conforms to the requirements specified herein, and shall identify the type of polyester used and the polyester producers commercial fiber designation (see 6.6 for denier and staple guidelines). 3.5 Color. The color (shade) shall be as specified in the applicable end- item s
18、pecification or in the contract (see 6.2). The dyed thread shall conform to the applicable approved shade standard (see 6.4), when tested as specified in 4.4.3. 3.5.1 Colorfastness. The colorfastness of the dyed and finished thread shall be as specified in the applicable end item specification or as
19、 set forth in the -_ contract (see 6.2 and 6.5), except that when-requirements are not stated or referenced to a standard sample for colorfastness, the thread shall show “good“ fastness to laundering (after 3 cycles), perspiraton, and light, and dry heat when tested as specified in 4.4.3. When a sta
20、ndard sample for colorfastness is referenced, the thread shall be equal to or better than the standard sample for the specified colorfastness properties when tested as specified in 4.4.3. 3.6 Construction. The thread shall be made by twisting together two or more of the single yarns to meet the spec
21、ified size, ply, and ticket number requirements. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-43624B 83 W 9999906 0469679 1 = MIL-T-43 624B 3.7 Twist direction. Unless otherwise specified (see 6.21, the single yarn shall be twisted “S“ an
22、d the final plied twist shall be “2“ when tested as specified in 4.4.3. 3.8 Physical requirements. The finished thread shall conform to the applicable requirements in table I when tested as specified in 4.4.3. TABLE I. Physical requirements Ticket Length per pound Breaking force Elongation number Ap
23、proximate (yarns) minimum ma x i mum (size) Tex Plies Min. Max. Pounds (percent) 120 1 O0 70 50 40 30 24 20 16 12 20 2 25 2 30 2 or 3 40 2 or 3 45 2 or 3 60 2, 3 or 4 70 2, 3 or 4 85 2, 3 or 4 130 2, 3 or 4 180 2, 3 or 4 22,001 26,400 18,001 22,000 14,001 18,000 11,701 14,000 9,201 11,701 7,001 9,20
24、0 6,001 7,000 4,501 6,000 3,401 4,500 2,401 3,400 1.2 1.7 2.2 2.7 3.3 4.5 5.7 7.0 9.5 13.0 20 20 20 20 20 20 30 22 22 22 3.9 Soft finish. The thread shall have a soft finish with no luster other than that inherent in the polyester material. 3.9.1 Finishing materials. The finished thread shall have n
25、o chemical finishes or treatments other than those commonly used on commercial threads or those demonstrated to have no deleterious effects on the polyester fiber including effects in prolonged storage. No finish or treatment shall be applied for the purpose of increasing breaking force (see 4.4.3).
26、 3.10 Knots and splices. The thread shall average not more than one full thread knot or splice per 1,000 yards (see 4.4.2.2). 3.11 Put-up. Unless otherwise specified (see 6.2), the thread shall be put-up in accordance with table II on commercial spools, cones, or tubes (herein-after referred to as h
27、olders). not less than the spaciied nominal length minus 3.0 percent tolerance when examined (on a 10-holder basis) as specified in 4.4.3. The thread shall be put-up in one continuous length per holder and shall be so wound that each turn and layer is free from entanglement when examined as specifie
28、d in 4.4.2.2. The average length per holder shall be 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* MIL-T-43624B 83 9999906 0469680 8 M MIL-T-43 62413 TABLE II. Put-up on holders Nominal length Ticket number (Yards) per holder 120 1 O0 70 50 40
29、30 24 20 16 12 12,000 or 24,000 12,000 or 24,000 6,000 or 12,000 6,000 or 12,000 6,000 or 12,000 6,000 or 12,000 6,000 or 12,000 3,000 or 6,000 3,000 or 6,000 3,000 or 6,000 3.11.1 Ready-made lockstitch bobbins. When thread is put up on lockstitch bobbins, the style of bobbin and length of thread th
30、ereon shall be as specified in the contract (see 6.2). Unless otherwise specified (see 6.21, ready-made lockstitch bobbins shall be put-up in either one-half or one gross pack. 3.12 Identification marking. Except when commercial identification markings are specified in the invitation to bid, each ho
31、lder, except ready-made lockstitch bobbins shall have a label attached in such a manner as to remain in place and be clearly legible until all thread has been removed. Ready-made Lockstitch bobbins shall have the label attached to the unit container (one-half or one gross pack). The label shall be p
32、rinted with the information as specified below: e Stock number Length (yardage and meters) Direction of twist Color Ply Size (ticket number) Name of contractor Nomenclature 3.13 Workmanship. The finished thread shall conform to the quality of product established by this specification. 5 Provided by
33、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-43624B 3 9799906 0469683 T = MIL-T-43 624B 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for th
34、e performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disa
35、pproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all
36、 requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the speciEication shall not relieve the contractor of the responsibility of ensuring th
37、at all products or supplies submitted to the. Governnient for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known de
38、fective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.1.2 Certificates of compliance. When certificates of cornpliance are submitted, the Government reserves the right to inspect such items to determine the validity of the certification. 4.2
39、Classification of inspections. The inspection requirenents specified herein are classified as follows: a. First article inspection (see 4.3) b. Quality conformance inspection (see 4.4) 4.3 First article inspection. When a first article is required (see 3 6.21, it shall be examined for the defects sp
40、ecified in 4.4.2.1 and 4.4.2 4.4 Quality conformance inspection. Unless otherwise specified, sampl inspection shall be performed in accordance with MIL-STD-105. 1 and 2. ng for 4.4.1 Component and material inspection. In accordance with 4.1, components and materials shall be inspected in accordance
41、with all the requirements of referenced documents unless otherwise excluded, amended, modified, or qualiEied in this specification or applicable purchase document. 4.4.1.1 Certification. The polyester cut-staple material shall be accepted on the basis of a contractors certificate of compliance with
42、the requirements indicated in table III. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* MIL-T-43624B 3 = 9999906 0469682 L MIL-T-43 624B TABLE III. Polyester cut-staple certification Requirement Characteristic paragraph Specific gravity Polyeste
43、r identification No mixture of denier, luster, cross sections, mixed, drawn or undrawn fibers or garnetted fibers Any form of polyester waste Producers commercial fiber designation 3.4.1 3.4.1.1 3.4.1.1 3.4.1.1 3.4.1.1 4.4.2 End item visual examination. 4.4.2.1 Thread on holder examination. Thread o
44、n the holder shall be examined for the defects listed in table IV. The lot size shall be expressed in units of one holder. The sample unit shall be one. holder. The inspection level shall be S-3, and the acceptable quality level (AQL), expressed in terms of defects per hundred units, shall be 4.0. T
45、ABLE IV. Thread on holder defects Examine Defect Identification label Missing, incorrect, incomplete, illegible, or insecurely attached Type. holder Other than spec if ied Surface condition Loose or unattached ply Cut, tear, chafe, or slip, affecting strength of thread or interferring with easy loca
46、tion of end and initial unwinding Cleanliness Dirt, spot, or stain clearly noticeable Finish Other than specified Uneven, lumpy, bare or thin spots 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-43624B 3 9999906 0469683 3 = MIL-T-43624B 4.4.
47、2.2 Thread as unwound examination. The thread shall be examined while unwinding, for the defects listed in table V. regardless of their proximity to each other. expressed in units of one holder and the sample unit shall be one holder. For ready-made lockstitch bobbins, the lot size and sample unit s
48、hall be expressed in units of one-half gross pack or one gross pack (as applicable). inspection level shall be S-3 and the AQL, expressed in terms of defects per hundred units, shall be 4.0. All defects shall be counted The lot size for holders shall be The TABLE V. Thread as unwound defects Examine
49、 Defect Continuous length Not in one continuous length Knots and splices Wind i ng Color Tackiness or adhesion Averaging more than one full thread knot or splice per 1000 yards Improperly or not firmly wound, resulting in kinks, knots, entangling, or slippage during unwinding, or otherwise affecting free unham- pered unwinding of thread Other than specified, not uniform Uneven, apparent on successive layers or end to end
