1、 MIL-Y -833 70A (USAF) 23 November 1973 SUPERSEDING MIL-Y-83370 (USAF) 25 April 1972 MILITARY SPEC IFICATION YARN, ROVING, AND CLOTH: HIGH MODULUS, ORGANIC FIBER 1. SCOPE 1.1 Scope. This specification covers organic fibrous materials which wi11 be used as yarns, rovings, and cloth used by themselves
2、 or as components of other materials. compatibility with resin systems are included if applicable, 1.2 Glassification, High modulus, continuous organic fibers shall be furnished in the forms and types as specified (see 6.1) below: Treatments to provide Form 1 - Yarn Form 2 - Roving FOIXI 3 - Cloth T
3、ype a - Untreaeed Type b - Epoxy compatible Type c - Polyimide compatible 2. APPLICABLE DOCUMENTS 2.1 invitation for bids or request far proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS The following documents of the issue in effect on date of FEDERAL PPP-P-
4、1133 Packaging and Packing of Synthetic Fiber Fabric s STANDARDS FEDERAL FED STD 191 Textile Test Method MILITARY MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Y-83370A 3 m
5、 7999906 0408737 3 m MIL-Y-83370A (USAF) MILITARY MIL-STD- 12 9 Marking for Shipment and Storage (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by t
6、he contracting officer . ) 2.2 Other Publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS
7、ASTM D2343-67 Tensile Properties of Glass Fiber Strands, Yarns and Roving Used in Reinforced Plastics ASTM D1505 Density of Plastics by the Density-Gradient Technique (Applications for copies of American Society for Testing and Materials specifications should be addressed to the American Society for
8、 Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) 3. REQUIREMENTS 3.1 Definitions. 3.1.1 Filament. A filament is defire d as a rod of very small diameter drawn continuously to indefinite length. 3.1.2 Yarn. drawn together and gathered into an approximately parallel arrange
9、ment with or without twist. A yarn is defined as a multiplicity of filaments 3.1.3 Roving. together into an approximately parallel arrangement without twist . A roving is defined as a number of yarns gathered 3.1.4 Lubricant. A lubricant is defined as that minute quantity of organic or inorganic sub
10、stance used to coat (surround) the fibers in order to keep the individual fibers apart and thus minimize abrasive action. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Y-83370A 83 m 797790b 0408738 5 MIL-Y - 8 3 3 7 OA (USAF) 3.1.5 Twist. The
11、 mist is defined in terms of number of turns per inch. Its direction is indicated by the letters S“ or “Z“ . Yarn structure has S-twist if, when held in a vertical position, the spirals conform in slope to the central portion of the letter “S“, it has Z-twist if the spirals conform in slope to the c
12、entral portion of the letter “2“. 3.1.6 hap and Filling (Ends and Picks). The construction of cloth or fabric consists of interweaving warp yarns (length- wise af the fabric in the loom) and filling yarns (crosswise of the fabric in the loom). When defining a fabric construction, the wrap yarns are
13、called ends and may be counted as ends per inch in wide goods, or as total ends when a width is stated for narrow goods. The filling yarns are called picks and are usually counted as picks per inch. 3.1-7 Denier. Denier is the weight in grams of 9000 meters of filament yarn or roving. 3.2 Design and
14、 Construction 3.2.1 Form 1 Yarn 3.2.1.1 Continuous-Filament Yarn. Continuous-filament yarn shall be furnished in conformance with Table I. 3.2.1.2 Tolerances. The following tolerances will be peruiitted on organic fiber yarn: a. Denier plus or minus 10 percent, b. No individual break shall be below
15、80 percent of the minimum requirements. 3.2.1.3 Twist. Yarn shall be furnished with less than 1 turn per 0.5 foot of twist unless otherwise specified by purchaser. 3.2.1.4 Fut-Up. Yarn shall be wound on tubes or cones. Unless otherwise specified, the manufacturers usual quantity of yarn per tube or
16、cone will be acceptable. 3.2.1.5 Treatment Material supplied shall be treated if required to insure compatibility with the resin system with which it is to be laminated . 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE I Yarn Form 1A 1B 1c De
17、nier 195 380 1140 Filaments per yarn, maximum 134 267 768 Filament diameter, inches .O0046 .O0005 Density , gram/cm 3 1.45 0.05 Ultimate Tensile Strength, 490,000 min., psi Modulus of Elasticity, min., 17.5 i06 psi 3.2.1.6 Type. Treatments shall be specified by the purchasing agency. 3.2.2 Form 2 Ro
18、ving 3.2.2.1 Roving. Roving shall be furnished in conformance with Table II. 3.2.2.2 Tolerances. The following tolerances will be permitted on roving: a. Denier and yield - plus or minus 10 percent. b. No individual break shall be below 80 percent of the minimum requirements. 3.2.2.3 Twist, Roving s
19、hall be furnished without twist. TABLE II Roving Form 2A 2B Roving Denier 4560 7 100 Yield, grams/yard O .463 0.721 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license f
20、rom IHS-,-,-ci v) j” rl a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Y-83370A 3 7777706 OLIO8742 7 MIL-Y - 83 3 70A (US Al?) reading of printed, stamped, or typed markings. legibly printed with water insoluble ink and will include the follow
21、ing information: The label shall be Manufacturers name Manufacturers identification Nomenclature Denier or yardage Each container shall be legibly marked by label and stencil with water insoluble ink which will include the following information: Manufacturer s name Manufacturers identification Nomen
22、clature Specification number Contract number and date Name of contracting agency 3.4 Workmanship. The finished material shall conform to the quality and grade of product established by this specification. The occurrence of defects shall not exceed the applicable acceptable quality levels. 4. QUALITY
23、 ASSURANCE PROVISIONS 4.1 Material. The fibers shall be consistent in cross-section, reproducible in chemical composition and morphology. shall be free from foreign particles, dirt, lint and other impurities. The material 4.2 Responsibility for Inspection. Unless otherwise specified in the contract
24、or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified he
25、rein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth inthe specification where such inspecions are deemed necessary to assure supplies and services conform to prescribed requirements. 4.3 Inspection. Inspection shall be in accordan
26、ce with the provisions of MIL-STD-105, except where otherwise specified. 4.3.1 Examination of Yarn and Roving. The defects listed in Table IV shall be counted regardless of their proximity to each other, except where two or more defects represent a single local condition, in which 7 Provided by IHSN
27、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-case only the more serious defect shall be counted. shall be 10 yards or 10 percent of the yardage of the cone or tube, whichever is the smallest quantity. The lot size for. this examination shall be expressed in units
28、 of one cone or tube as applicable. The acceptable quality level shall be 0.65 major and 4.0 total defects (major and minor combined) defects per hundred units. The inspection The sample unit I The sample unit for this examination shall be one tube. inspection level shall be level S-3 and the accept
29、able quality level shall be 4.0 defects per hundred units, except for lots consisting of 500 of fewer units, then sample size shall be 10 tubes and the lot shall be unacceptable if two or more tubes in the sample are defective in regard to weight, specified in 3.2.1.2 or 3.2.2.2 shall be considered
30、a defect with The Any tube found not within the range of weight Maior Minor E Appearance : F) .j t4 X Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Y-83370A 3 U 777770b 0!08744 O U MIL-Y-83370A (USAF) 4.3.2.1 Yard-by-Yard Examination of Cloth.
31、Therequired yardage of each roll of cloth shall be examined on both sides for defects listed in Table V. All defects found shall be counted regardless of their proximity to one another, except where two or more defects represent a single local condition of the end item, in which case . only the more
32、 serious defect shall be counted. A continuous defect shall be counted as one defect: for each lengthwise yard or fraction thereof in which it appears. The sample unit shall be one linear yard full width. and 1.0 total (major and minor combined) defects per hundred units (yards) or the cloth. from t
33、he sample is to he selected shall be in accordance with Table VI. from each tube or roll selected. 4.3.2.2 Overall Examination of Cloth. Each defect listed below shall be counted no- more than once in each tube or roll examined. The sample unit for this examination shall be one tube oc roll, as appl
34、icable. shown in Table VI. The lot size shall be expressed in units of one (1) linear yard each. The acceptable quality levels shall be 2.5 major The number of tubes or rolls, as applicable, An approximately equal number of yards shall be examined The sample size and acceptance number shall be as a.
35、 Objectionable odor. b. Overall uncleanliness. c. Width other than specified. d. Uneven weaving. TABLE V Lot Size in Yards Up to 13001. 1301 to 3200.,. 3201 to 8000,.,. 8001 to 22,000. . 22,001 to llO,Q00. . 110,001 and over Sample Size in Tubes or Rolls 3 5 7 10 15 25 Maximum Number o Defect Accept
36、able O O O O 1 1 lIf it lot contains fewer than three (3) tubes or rolls, each tube or roll in the lot shall be examined. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Y -833 70A (USAF) TABLE VI VISUAL EXAMINATION OF CLOTH Defect Major Minor
37、Class if ication Hole, cut, tear, or smash . any X Spot, stain, or streak: 2 inches or more in combined length and width Less than 2 inches in combined length and with Baggy, ridgy, or wavy (cloth) X directions.,. X directions, X Tender or weak spot? . X Broken or missing yarn: 3 or more continguous
38、, regardless of length X 2 continguous, less than 2 inches in length 2 oontinguous, 2 inches or more .in length., X Single, 2 inches or longer or full width if filling-wise direction. is less than two inches Float and Skip: Multiple, 2 inches or more in length . X Multiple less than 2 inches in leng
39、th Single, 2 inches or longer of full width if filling-wise direction. X is less than two inches Thick or thin place?. . Crease X Brittle or fused area . any X Wlearly visible at normal inspection distance (3 feet). X X X X LO Provided by IHSNot for ResaleNo reproduction or networking permitted with
40、out license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-The lot shall be unacceptable if one or more units fail to meet any requirements specified. The lot size shall be expressed in units of 1 linear yard for cloth and 1 pound for y
41、arn. TABLE VI1 TEST METHODS Requirement Paragraph Yarn : Test Method Turns twist Denier 3.2.1.3 3.2.1.2, Table I 4054 4010 Tensile Strength Tensile Modulus Density Table I Table I Table I ASTM D2343-67 ASTM D2343-67 ASTM D1505 Roving : Turns twist 3.2.2.3 Yield 3.2.2.2, Table II Tensile Strength Tab
42、le II Tensile Modulus Table II Cloth: Weave Table III Yarns per inch (minimum) Warp Table III Fil 1 ing Table III 4054 4010 ASTM D2343-67 ASTM D2343-67 Visual (1) 5050 5050 Thickness Weight oz/yd2 Table III Table III (1) One determination per sample unit and results or fail“. 5. PREPARATION FOR DELI
43、VERY 5.1 Packaging 5.1.1 Level A 5030 5041 reported as “pass Form 1 and 2. Each tube or cone shall be individually wrapped in a 30 pound minimum basic weight kraft paper or enclosed in a wrap or bag of clear polyethylene fiber, 0.0015 inch thickness minimum. The wrap or bag shall be secured with a p
44、iece of pressure sensitive tape. l2 9 - I _ - _. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Y-83 37 OA (USAF) Form 3. Cloth, put up as specified, shall be packaged in accordance with the requirements of PPP-P-1132. 5.1.2 Level C, packaged to
45、 afford adequate protection against deterioration and physical damage during shipment from the supply source to the first receiving activity. The supplier may use his standard practice when it meets these requirements. Fiber material put up as specified shall be 5.2 Packing 5.2.1 Level B Form 1 and
46、2. Yarn or roving of one type only, packaged as speclfied shall be packed in a snug fieting shipping container conforming to style RSC, Type CF or SF, class domestic, variety SW, grade 275 of PPP-B-636. The weight of contents shall not exceed 65 pounds. Form 3. Each fiber roll shall have a piece tic
47、ket as required by PPP-P-1133, 6. NOTES 6.1 Intended Use. Materials described in this specification are intended for use in fiber reinforced plasttcs, tension cables, and other specialty applications. 6.2 Ordering Data. Procurement documents should specify the following: a. Title, number, and date o
48、f this specification. b, Form required (see 1.2). Form 1: Denier required (see Table I) Form 2: Denier or yield required (see Table 11) From 3: Style and construction required (see Table III), c. Type required (see 1.2). Type a: Untreated Type b: Epoxy compatible Type f: : Polyimide compatible Custodian : Preparing Activity: - Air Force - 11 Air Force - 11 Project Number 8305-F306 13 - U. S. GOVERNMENT PRINTING OFFICE: 1973-713- 149125 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
