1、MIL-PRF-4bL97A 9999906 2033387 070 D 1 INCH-POUND I MIL-PF-46197A 16 ADril 1997 SUPERSEDING MIL-L-46197(MR) 23 December 1987 PERFORMANCE SPECIFICATION LAMINATE: HIGH-STRENGTH GLASS, FABRIC-REINFORCED, POLYESTER RESIN PREIMPREGNATED This specification is approved for use by all Departments and Agenci
2、e8 of the Department of Defense. 1. SCOPE 1.1 Seo-. This specification establishes the requirements for a high strength woven glass roving impregnated with polyester resin for molding thick armored vehicle structures. 1.2 Claasification. Laminates to be of the type specified (see 6.2): Type 1 Flat T
3、ype2 Curved 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for additional information or as examples. While every effort
4、has been made to ensure the completeness of this list, document users are cautionedthattheymust meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications. standards, and handbooks. The fol
5、lowing specifications, standards, and handbooks form 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 (DoDISS) and supplement thereto, cit
6、ed in the solicitation (see 6.2). STANDARDS DEPARTMENT OF DEFENSE MIL-STD-662 V50 Ballistic Test for Armor (Unless otherwise indicated, copies of the above specifications, standards, and handbooks are available fromthe Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphi
7、a, PA 19111-5094). I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, U.S. Army Research Laboratory, Weapons and Materials Research Directorate, ATTN: AMSRL-WM-M, APG, MD 21005-5069 by
8、using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I I AMSC NIA AREA CMPS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-PRF-46197A 9999906 2033388 TO7 MIL-PRF-46197A 2.3 No
9、n-Government Dublications. The following document forms a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues
10、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) ASTM D638 ASTM D695 ASTM D790 ASTM D792 ASTM D2343 ASTM D2344 ASTM D2584 ASTM D4065 ASTM E537 Standard Test Method for Tensile Properties of Pl
11、astics Standard Test Method for Compressive Properties of Rigid Plastics Standard Test Methods for Flexural Properties of Unreinforced and.Reinforced Plastics and Electrical Insulating Materials Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement Sta
12、ndard Test Method for Tensile Properties of Glass Fiber Strands, Yarns, and Roving8 Used in Reinforced Plastics Standard Test Method for Apparent Interlaminar Shear Strength of Parallel Fiber Composites by Short-BeamMethod Standard Test Method for Ignition Loss of Cured Reinforced Resins Standard Pr
13、actice for Determining and Reporting Dynamic Mechanical Properties of Plastics Standard Test Method for Assessing the Thermal Stability of Chemicals by Methods of Dif ferential Thermal Analys is (Application for copies should be addressed to the American Society for Testing and Materials, 100 Barr H
14、arbor Drive, West Conshohocken, PA 19428). 2.4 Order of DreCedenCe. 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 specifi
15、c exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with paragraph 4.2.1. 3.2 CornPosition. The high strength glass woven roving shall be impregnated with a resin that has been formulated in
16、 such a manner as to yield material that meets the requirements of this specification. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46L77A 9999906 2033387 943 M MIL-PRF-46197A 3.3 Rovinq. 3.3.1 Yield. The nominal roving yield shall be 25
17、0 yds/lb (504 m/kg) f 8.5%. Rovings with higher yield (750 or 1250 yds/lb) may not be substituted without written approval from the acquisition activity. A semi-compatible sizing shall be used. 3.3.2 0.035 lb/m nor greater than 0.065 lb/in. Denstty. The roving shall have a package ball density of no
18、t less than 3.3.3 Hardness. The roving shall have a shore “O“ package ball durometer hardness of not less than 50 nor greater than 90. 3.3.4 Catenarv. The roving shall have a catenary requirement of not greater than 1.0 in/50 ft. Unless otherwise specified, the catenary requirement applies only to r
19、ovings having a yield of 700 or more yards per pound. 3.3.5 Tensile strenuth. The roving shall have a tensile strength of not less than 400,000 psi. 3.3.6 Resistance to fusion. An ignited specimen shall be examined for fusion. The specimen shall not fuse during the specified ignition. 3.3.7 Woven cr
20、lass rovinq. The material shall conform to the requirements as specified by the procuring activity. Fabric weight shall be 24 oz/ydz i 3% (813 g/m2 f 3%). Additional requirements include: A colored tracer yarn shall run down the center of the material to indicate the warp direction. b. The material
21、shall be free of all knots. Splices between rovings shall allow adequate strength to withstand vertical tower prepregging. Acceptable methods include overwrapping, air splicing, and adhesive splicing. The adhesive used in the latter me.thod shall be limited to the rovings being spliced and shall not
22、 be spread to the surrounding fabric. c. The fabric shall be evenly woven, clean, free of creases, wrinkles and other forms of permanent distortion. The finished fabric shall conform to the quality of product established herein. Any sizings or other fabric treatments shall be compatible with the res
23、in system or shall be formulated to ensure ease of removal during standard fabric cleaning operations. 3.3.8 Resin. The resin shall be in a form (liquid or solid) suitable for impregnating or furnished already impregnated on fabric (pre-impregnated). The resin shall be free from foreign materials. 3
24、.4 PrePrea physical roperties. 3.4.1 Characteristics. The impregnated woven glass roving shall be a self-tack material with good drape characteristics. Stiff boardlike material shall not be acceptable. It shall release readily from the polyethylene separator sheet without being deformed or losing re
25、sin from the surface. 3.4.2 Volatile content. Volatile content shall be not greater than 3%. 3.4.3 Resin content. Resin content shall be 34 i 3% by weight. 3.4.4 Resin flow. Resin flow shall be 8 f 4%. a. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS
26、-,-,- MIL-PRF-4bL97A 9999906 2033390 665 1 MIL-PRF-46197A 3.4.5 Gel time. Gel time shall be not less than 50 seconds nor greater than 150 seconds 3.5 Prenrea reactive properties. A heating rate of 3OC (37.4%) per minute shall be used. The temperature range of the scan shall be room temperature to 2O
27、O0C (392F). The heat of reaction (cal/-), onset temperature (OC), and peak temperature (OC) shall be reported, along with the complete Differential Scanning Calorimetry (DSC) curve. 3.6 Laminate nroperties. 3.6.1 Test panel. A cured laminate test panel shall be fabricated to conform with the physica
28、l and mechanical property requirements in table I. 3.6.2 Flammabilitv. The flame on the laminate shall self-extinguish within 15 seconds following a 10 minute application in order to pass the test specified in 4.6.0. 3.7 Laminate ballistic propertv test method. 3.7.1 Laminate preparation. The lamina
29、te shall have a thickness or aerial density as specified in the contract. The fabric content shall be 68 f 3% by weight. 3.7.2 (725 m/s) . Ballistic testinq. The V50 ballistic limit shall meet or exceed 2380 ft/s 3.8 Storacre and out-time reauirements. Material shall comply with the requirements of
30、this specification after the following: a. 6 months storage in the shipping container at 39.29 (4OC) or less. b. 240 hours at room temperature (80*6% (27OC) max) sealed in a polyethylene bag. After 6 months storage, the material may be recertified to this specification for an additional 3 months she
31、lf life. After 9 months storage the material may be recertified again, for an additional 3 months. The material shall be disposed of after 1 year, 4. VERIFICATION 4.1 Verification alternatives. Alternative test methods, techniques, or equipment, including the application of statistical process contr
32、ol, tool control, or cost effective sampling procedures may be proposed by the contractor. Acceptable alternative verification approaches shall be identified in the contract * 4.2 Classification of inmections. The inspection requirements specified herein are classified as follows: a. First article i
33、nspection (see 4.2.1) b. Conformance inspection (see 4.2.2) 4.2.1 First article inspection. First article inspection shall be performed on the first production-representative sample(s) of an order when a first article sample is required (see 3.1). The first article sample(s) shall be examined for al
34、l the provisions specified by the procuring activity, the contract or the purchase order (see 6.2). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-4bL97A 9999906 2033391 5TL MIL-PRF-46197A This inspection shall consist of the tests specif
35、ied in 4.3 through 4.8. The supplier has the option to perform either the Package (Ball) density or the Shore O“ Package hardness test. Only one of these two tests is required. 4.2.2 Conformance inspection. Conformance inspection for acceptance of high strength woven glass roving impregnated with po
36、lyester resin shall meet all the provisions specified by the procuring activity, the contract or the purchase order (see 6.2). 4.3 Rovinq. 4.3.1 Yield. Compute the roving yield by dividing the weight of the specimen into the measured length of the specimen resulting in unite such as yards/pound. 4.3
37、.2 Densitv. Test the Package (Ball) density using the standard test methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement, ACTM D792. 4.3.3 Hardness. Use a shore “O“ durometer or equivalent to test the outermost layer of the roving ball. Make three readings randomly
38、 spaced around the circumference and along the length of the ball. 4.3.4 Catenare. Measure the distance between the furthermost separated strands perpendicular to the lengthwise direction. 4.3.5 Tensile strenath. Test five specimens per roving ball using the standard test method for Tensile Properti
39、es of Glass Fiber Strands, Yarns, and Rovings Used in Reinforced Plastics, ASTM D2343. 4.3.6 Resistance to fusion. Ignite at a temperature of 1494 f 45% (812 f 25OC) a specimen of accurately measured length weighing 10 grams. 4.3.7 Woven dass rovinq. Examine the material for compliance with the requ
40、irements specified in 3.3.7. 4.4 Preprea phvsical properties. 4.4.1 Characteristics. Examine the impregnated woven glass roving for the characteristics specified in 3.4.1. 4.4.2 Volatile content. The specimen shall be three (3) 4 inch (10 cm) square piece8 of material. One piece to be cut from each
41、side, within 6 inches (15 cm) of the edge, and a third piece cut from the center. The specimen shall be weighed, dried by suspending for 10 minutes f lminute in a circulating air oven at the materials postcure temperature 250 f 10% (121 i 6OC), cooled in a desiccator, and re-weighed. Volatile Conten
42、t % = _/Initial wt - Drv wt 1 X 100 Initial wt 4.4.3 Resin content. The specimen shall be three (3) 4 inch (10 cm) square pieces of material. One piece to be cut from each side, within 6 inches (15 cm) of the edge, and a third piece cut from the center. The specimen shall be placed in a tared dry di
43、sh kor equivalent), weighed, and ignited in a muffle furnace at 1051 i 50% (566 i 28 C) for 30 minutes or until the specimen has the color of the glass reinforcement. The crucible and contents shall be cooled in a desiccator and re-weighed. Resin Content % = (Initial wt - Ianited wt 1 X 100 Initial
44、wt 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-4bL97A M 9999906 2033392 438 = MIL-PRF-46197A For reference, the fiber areal weight (oz/sq yd) shall also be reported based on the ignited &/area of the specimen. 4.4.4 Resin flow. Four (4
45、) 4 inch (10 cm) square pieces of material, taken from across the width of the material, shall be cut, stacked, and weighed. The stack shall be covered with 6 inch (15 cm) squares of non-porous polytetrafluoroethylene (PTFE) release fabric or equivalent, and placed in a press at 15 psi (103 kPa) pre
46、ssure and a platen temperature of 250% (121OC) for 10 minutes. After removing the specimen from the press, the release fabric shall be removed and edge flash shall be trimmed. The edge flash shall be trimmed such that the remaining matrix is flush with the edge of the fiberglass reinforcement. Care
47、shall be exercised during edge flash removal to ensure that fiberglass reinforcement is not removed during the edge flash trimming process. After trimming, the specimen shall be re-weighed. Resin flow % = (Initial wt - Final wtl X 100 Initial wt 4.4.5 Gel time. Approximately twenty (20) 2 inch (5 cm
48、) square pieces of material, taken across the width of the material, shall be cut, stacked, wrapped in foil, and placed in a press with the platens heated to the materials postcure temperature. A hole shall be pierced in the edge of the foil, and then pressure shall be applied to squeeze resin onto
49、the lower platen. The extruded resin shall be stirred with a wooden spatula, and the time for gelation to occur shall be noted. Gelation shall be indicated by a rubbery, but not stringy, condition. 4.5 Preiirea reactive Properties. A sample of resin which has been mechanically removed (by scraping) from the edge of the prepreg material shall be analyzed by Differential Scanning Calorimetry (DSC) according to the method established in the standard test method for Assessi
