1、RIPL-R-7595C 29 June 1966 SUPERSEDING MIL-R“7575B 16 November 1959 (see 6.5) MILITARY SPECIFICATION RESIN, POLYESTER, LOW-PRESSURE LAMINATING This specification is mandatory for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope - This specification covers the requi
2、rements for low-pressure laminating polyester resins usd in fabricating glass fabric- based plastic laminates for various applications (see 6.1). 1.2 Classification - The resin shall be furnished in the fol- lowing grades, classes, and forms, its specified (6.2): - Grade A - Normal mechanical proper
3、ties. Grade B - Impfved mechanical properties. Class O - Nonelectrical. Class 1 - Dielectric constant (laminate) of 3.6 up to 4. O. Class 2 - Dielectric constant (laminate) of 4. O up to 4.2. Class 3 - Dielectric constant (laminate) of 4.2 up to 4.4. Class 4 - Dielectric constant (laminate) of 4.4 u
4、p to 4.6. Form A - Liquid or solid resin (3.3). Form B - Pre-impregnated resin (3.3). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RIL-R-7575C 73 777770b OlLY772 b . . . . . . “i -. . MIL-R-7575C 2. APPLICABLE DOCUMENTS * 2.1 The following documen
5、ts, of the issue in effect on date of invitaiion for bids or request for proposal, form a part of this specification to the extent specified herein: SPECIFICATIONS , Federal NN-P-515 TT-1-735 TT-S-735 PPP-B-576 PPP-B-585 PPP-B- 59 1 PPP-B-601 PPP-B-621 PPP-B-636 PPP-C-96 PPP-D-705 .PPP-D-729 PPP-P-7
6、04 PPP-T-60 Military MIL-H-5606 Plywood, Container Grade Isopropyl Alcohol St.anda,rd Test Fluids; Hydrocarbon Box, Wood, Cleated, Veneer, Paper Overlaid Box, Wood, Wirebound Box, Fiberboard, Wood-cleated Box, Wood, Cleated-Plywood - Box, Wood, Nailed and Lock-Corner Box, Fiberboard can, Metal, 28 G
7、age and Lighter Drum, Metal Shipping, Steel (Over 12 and Under 55 Gallon) Drums: Metal, 55-Gallon (For Shipment of Noncorrosive Material) Pails, Shipping, Steel (1 through 12 Gallon) Tape, Pressure-Sensitive Adhsive, Water- proof, for Packaging Hydraulic Fluid, Petroleum Base, Aircraft, Missile, and
8、 Ordnance Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-“ . - - MIL-R-7575C 73 W 9399906 OlLLI993 B z t Military (continued) MIL-(2-9084 Cloth, Glass, Finished, for Polyester Resin Laminates MIL-L- 10547 Liners, Case, and Sheet, Overwrap; Water- Va
9、porproof or Waterproof, Flexible STANDARDS Federal Fed. Test Method Plastics; Methods of Testing Std. No. 406 Military MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes MIL- STD- 129 Markig for Shipment and Storage MIL-STD-147 Palletized Unit Loads (40 h. X 48 In. 4Way Partial
10、and 4-Way Pallets) (Copies of specifications, standards, drawings, and publica- tions required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer. ) 2.2 Other publications - The following documents f
11、orm apart 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: Uniform Classification Committee Uniform Freight Classification Rules (Application for copies of the above publication s
12、hould be addressed to the Uniform ClaSsification Committee, 202 Chicago Union Station, Chicago, Illinois 60606.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-7575C Interstate Commerce Commission . 49 CFR 71 - 90 Interstate Commerce Commiss
13、ion Rules and Regulations for the Transportation of ExplosiveP and Other Dangerous Articles (The Interstate Commerce Commisaw Regulations are now a part of the Code of Federal Regulations (latest cumulative pocket supplement) avail- able from the Superintendent of Docunaents, Government Printing Off
14、ice, Washington, D. C. , 20402. Orders for the above publication should cite “Code of Federal Regulations, 49 CFR 71 - 90 (Revised 1963)“). Manufacturing Chemists Association, Inc. Manual L-1 Guide to Precautionary Labeling of Hazardous Chemicals (Sixth Edition-1961) (Application for copies should b
15、e addressed to the Manu- facturing Chemists Association, Universal Building, 1825 Connecticut Avenue, Washington, D. C., 20009.) 3. REQUIREMENTS * 3.1 Preproduction - The resin furnished under this-specification .- shall be a product which has been subjected to and has passed the preproduction inspe
16、ction specified herein. * 3.1.1 One-year weathering data - As part of the preproduction requirement, the supplier shall submit certified data showing that a glass cloth . base plastic laminate, fabricated as specified in 4.3.1.1 from the resin to be furnished under this specification, has been expos
17、ed to outdoor weathering in accordance with 4.5.5 for a period of one year and has subsequently met the ap- plicable requirements of Table I. The data shall identify the geographical -location in which the outdoor weathering was accomplished. 3.2 Materials - The materials used in the manufacture of
18、the resin shall be of high quality and as specified herein. The resin shall be of the polyester, thermosetting, low pressure laminating type. The componem materials of the resin shall be such that the cured resin shall not be corrosive to metals, 3.3 Form - The resin shall be in a form (liquid or so
19、lid) - suitable for impregnating or may be furnished already impregnated on glass . fabric re-impregnated). It shall be free from foreign materials. “ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-7575C 3.4 Chemical type - The supplier shall
20、designate the polyester base and the cross-linking agents, such as Itunsaturated alkyd-styrene.Il (See 3.9.1 (d). ) 3.5 Code number - The supplier shall designate each resin com- position by a code number that shall be used to identify the resin. The code number may include trade name if desired. An
21、y changes in the components or manufacturing procedures shall necessitate use of a different code number. Forpre-impregnated materials, those materials using the same resin but having different properties due to different impregnating conditions shall have different designations. The designation sha
22、ll consist of the resin code number with a suffix indicating impregnating conditions. 3.6 Physical and reactive properties - For liquid or solid resin, the supplier shall furnish limiting values for specific gra-My, viscosity, and acid number of the liquid uncatalyzed resin; maximum gel time and pea
23、k exotherm of the catalyzed resin; and the Barco1 hardness and specific gravity of the cured unfilled resin. For pre-impregnated material, limiting values shall be furnished for the volatile content, dry resin content, and flow. These values and the methods of determination, when not specified herei
24、n, shall be included by the supplier in the instruction sheet (3.9) and shall be considered requirements of this specification for resin of the code number or designation concerned. The supplier shall also furnish nominal values (adequate for design calculations) for the dielectric constant and loss
25、 tangent of the cured unfilled resin (Classes 1 through 4 only) at the frequency applicable to the electrical tests of Table II. 3.7 Mechanical and physical properties of the laminate - The mechanical and physical properties of a glass cloth base plastic laminate, fabri- cated as specified in 4.3. l
26、. l shall conform to the values listed in Table I. 3.8 Electrical properties of the laminate (Classes 1 through 4 only) - The electrical properties of a glass cloth base plastic laminate, fabricated as specified in 4.3.1.2, shall conform to the values listed in Table II. (See also 6.2 (c) and 6.3.)
27、3.9 Instruction sheet - 3.9. I For liquid or solid resin - Unless otherwise specified, the supplier shall .provide for each unit package of resin an approved instruction sheet containing the following information: (a) Grade and class of the resin and the number of this specification. (b) Resin code
28、number (3.5). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-7575C 73 W 7777906 OLLq776 3 c I * MIL-R-7575C property Flexural properties, flatwise - pi Ultimste strength Initial nodulue of elasticity Ultimate tensile strength, p6i , Ult-te com
29、pressive strength, edgewise, psi PLanrmbility, inches per minute Water absorption, 24 hours hneraion, percent change in veight Barco1 hardness specific gravity also the test procedures when not specified herein. Dielectric constkt (nominal) and loss tangent (nom- inal) of the cured unfilled resin, C
30、lasses 1 through 4 only (3.6). Maximum usable storage life of the resin (uncatalyzed and catalyzed) and recommended storage conditions. Recommended mixing and impregnating procedures, in- cluding recommended types, percentages and manner of utilization of catalysts and retardants. Recommended finish
31、es to be used on glass fabric. Maximum allowable shelf life at various temperatures of impregnated fabric before curing. Range of time, temperature and pressure cycles recommended to affect the cure for laminates. Any other pertinent information, at the suppliers option, on storage and handling. . .
32、I i “ “. “. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-7575C 3.9.2 For pre-impregnated material - An instruction sheet for the pre-impregnated form shall be prepared as specified in 3.9.1 except that the following information, with descrip
33、tion of the method of determining the properties shall be substituted for items (a) through (i) of 3.9.1. (a) Grade and class of the resin and the number of this specification. (b) Material designation (3.5). (c) Form of the resin (3.3). (d) Chemical type of the resin (3.4). (e) Dielectric constant
34、(nominal) and loss tangent (nominal) of the cured unfilled resin component, Classes 1 through 4 only (3.6). (f) Volatile content (average and tolerance) (3.6). * (g) Dry resin content (average and tolerance) (3.6). (h) Flow (average and tolerance) (3.6). 3.10 Worlunanship - The material specified he
35、rein shall be processed as required in accordance with the-best practice for a high quality resin. 4. QUALITY ASSURANCE PROVISIONS 4.1 . Responsibility for inspection - Unless otherwise specified, in the contract or purchase order, the supplier is responsible for the performance of all inspection re
36、quirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed n
37、eces- sary to assure supplies and services conform to prescribed requirements. 4.2 Classification of inspections - The inspections performed under this specification shall be of the following classifications: (a) Preproduction inspection (4.3). (b) Quality conformance inspection (4.4) 8 “ -. . . . -
38、 .T“ _ . . - “ . - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* MIL-R-7575C 4.3 Preproduction inspection - Preproduction inspection shall include all the examinations and tests of this specification except the one ye= outdoor weathering test (4.
39、5.5), for which certified test data shall be submitted by the supplier (3.1. l), and the examination of preparation for delivery (4.6.11). Unless otherwise specified (4.3.2), no material shall be offered for acceptance under any contract or order until the preproduction samples prescribed in 4.3.1 h
40、ave been subjected to preproduction inspection and pronounced satisfactory by the procuring activity. However, approval of the preproduction samples or of acceptable test data (4.3.2) in lieu thereof shall not relieve the supplier of his obligation to meet the quality conformance inspection. * 4.3.1
41、 Sampling for preproduction test - The following samples and materials shall be submitted by the supplier for preproduction test: (a) Two copies of the certified weather resistance data specified in 3.1.1. (b) Two copies of the instruction sheet specified in 3.9. (c) One gallon of liquid or dry resi
42、n; or eight square feet, full fabric width, of pre-impregnated resin fabric as applicable, dependent on the form of resin supplied. (d) A 2 foot by 2 foot glass cloth base laminate sheet O. 125 +O. O10 inch thick (see 4.3.1.1) or five sheets, each one foot square, of that thickness for determining m
43、echanical and physical properties of the laminate. Unless otherwise specified in the contract or order, this sheet shall be processed by the supplier into the required number of test specimens for all mechanical and physical tests, machined to size and suitable for testing. (e) A 4 inch by 8 inch gl
44、ass cloth base laminate sheet at least O. 75 inch thick (see 4.3.1.2) for tests of electrical properties (Classes 1 through 4 only) * 4.3.1.1 Laminate sheet for mechanical and physical properties - The laminate sample for mechanical and physical tests shall be fabricated in the form of a sheet or sh
45、eets O. 125 *O. O10 inch in thickness, using the resin 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HIL-R-7575C 73 m 777770b OLL5000 T m I I MIL-R-7575C I which is under test and 12 plies, laid up.paralle1, of 181 glas; cloth conforming to MIL-C
46、-9084 for finished cloth. The sample shall be laminated at a pressure not exceeding 30 pounds per square inch and shall be fully cured in accordance with the resin suppliers instruction sheet. The sample shall be essentially void lree and representative of the best quality worlunanship and shall hav
47、e a resin content by weight that will produce a laminate with optimum properties. Specimens from this laminate shall be tested to determine conformance to the mechanical and physical requirements of 3.7. * 4.3.1.1.1 . Base fabric for pre-impregnated laminate samples - ynless otherwise specified, the
48、 laminate prepared for preproduction tests of pre-impregnated materials shall be fabricated with 181 glass cloth, regardless of the base cloth to be used in the actual delivery of pre-impreg- nated resin. This substitution shall apply to the laminate samples only, not to the pre-impregnated samples
49、of 4.3.1 (c) or 4.4.1.2. * 4.3.1.2 Laminate sheet for electrical property tests - The glase fabric base, resin content, specific gravity, finish, and other physical characteristics of the laminate sample for electrical test (4.3.1 (e) shall be the same as those of the laminate fabricated in accordance with 4.3.1.1. The laminating procedure shall follow, as closely as practical, the procedure used in 4.3.1.1. * 4.
