1、SAE-AMS3827ADOPTION NOTICESAE-AMS3827, “CLOTH-TYPE “E“ GLASS, “B“ STAGE POLYESTER-RESINIMPREGNATED 7781 STYLE FABRIC, FLAME RESISTANT“, was adopted on21-DEC-88 for use by the Department of Defense (DoD). Proposedchanges by DoD activities must be submitted to the DoD AdoptingActivity: Commander, Atla
2、ntic Division, Naval FacilitiesEngineering Command, Criteria Office, 1510 Gilbert St, Norfolk,VA 23511-2699. Copies of this document may be purchased fromthe Society of Automotive Engineers 400 Commonwealth DriveWarrendale, Pennsylvania, United States, 15096-0001. http:/www.sae.org/_Custodians: Adop
3、ting Activity:Navy - YDArmy - MRNavy - YDAir Force - 11FSC 8305DISTRIBUTION STATEMENT A: Approved for public release; distributionis unlimited.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAECLOTH,
4、TYPE “E” GLASS, “B” STAGE POLYESTER-RESIN-IMPREGNATED7781 Style Fabric, Flame ResistantAMS 3827BIssued 1 DEC 1973Revised 1 APR 1991Superseding AMS 3827AAEROSPACEMATERIALSPECIFICATIONSAESAEThe Engineering SocietyFor Advancing MobilityLand Sea Air and Space400 Commonwealth Drive, Warrendale, PA 15096-
5、0001INTERNATIONALAn AmericanNationalStandardSAE Technical Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences.The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any pa
6、tent infringementarisingtherefrom, is the sole responsibility of the user.“SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites yourwritten comments and suggestions.Copyright 1991 Society of Automotive Engineers, Inc.All r
7、ights reserved. Printed in U.S.A.1. SCOPE:1.1 Form: This specification covers a style 7781 glass cloth impregnated with aheat-curable polyester resin system, the resin being processed to a “B“stage condition, and furnished in the form of continuous rolls.1.2 Application: Primarily for vacuum-bag mol
8、ded, flame resistant laminatesused up to 80C (176F).1.3 Safety - Hazardous Materials: While the materials, methods, applications,and processes described or referenced in this specification may involve theuse of hazardous materials, this specification does not address the hazardswhich may be involved
9、 in such use. It is the sole responsibility of theuser to ensure familiarity with the safe and proper use of any hazardousmaterials and to take necessary precautionary measures to ensure the healthand safety of all personnel involved.2. APPLICABLE DOCUMENTS: The following publications form a part of
10、 thisspecification to the extent specified herein. The latest issue of SAEpublications shall apply. The applicable issue of other publications shallbe the issue in effect on the date of the purchase order.2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale,PA 15096-0001.2.1.
11、1 Aerospace Material Specifications:AMS 2825 - Material Safety Data SheetsAMS 3824 - Cloth, Type “E“ Glass, Finished for Resin LaminatesCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AMS 3827BAMS
12、3827B2.2 ASTM Publications: Available from ASTM, 1916 Race Street, Philadelphia, PA19103-1187.ASTM D 638 - Tensile Properties of PlasticsASTM D 638M - Tensile Properties of Plastics (Metric)ASTM D 695 - Compressive Properties of Rigid PlasticsASTM D 695M - Compressive Properties of Rigid Plastics (M
13、etric)ASTM D 790 - Flexural Properties of Unreinforced and Reinforced Plastics andElectrical Insulating MaterialsASTM D 790M - Flexural Properties of Unreinforced and Reinforced Plastics andElectrical Insulating Materials (Metric)ASTM D 2344 - Apparent Interlaminar Shear Strength of Parallel FiberCo
14、mposites by Short Beam MethodASTM F 501 - Aerospace Materials Response to Flame, with Vertical TestSpecimen (for Aerospace Vehicles Standard Conditions)2.3 U.S. Government Publications: Available from Standardization DocumentsOrder Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.2
15、.3.1 Military Standards:MIL-STD-2073-1 - DOD Materiels, Procedures for Development and Applicationof Packaging Requirements3. TECHNICAL REQUIREMENTS:3.1 Material:3.1.1 Reinforcement: Shall conform to AMS 3824, Style 181, 1581, or 7781.3.1.2 Resin: Shall be a low-pressure-laminating polyester resin m
16、odified asnecessary to meet the requirements of 3.2, 3.3, and 3.4.3.2 Shelf Life: The impregnated cloth shall have a shelf life of not less than0 three months from date of receipt by purchaser when stored below 7C (45F)or six months when stored at 18C (0F) or below in moisture-proof, sealedcontainer
17、s.3.3 Working Life: The impregnated cloth shall meet the requirements of 3.4 whentested after continuous exposure up to 20 days within the relative humidityand temperature limits shown in Figure 1.- 2 -Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or
18、 networking permitted without license from IHS-,-SAE AMS 3827BAMS 3827B3.4 Properties: Impregnated cloth shall conform to the following requirements:3.4.1 Uncured Impregnated Cloth: Shall conform to the following requirements;tests shall be performed on the cloth after warming to above the dew point
19、in its sealed moisture-proof container prior to sampling and in accordancewith specified test methods:Volatiles, % by weight To be reported inpreproduction report4.5.2Resin Solids Content(Volatile Free), % by weight 40 44.5.2Gel Time, minutes Preproduction Value 20% 4.5.3Resin Flow Preproduction Val
20、ue 20% 4.5.43.4.2 Cured Laminate: Shall conform to the following requirements; tests shall beperformed at 25C 3 (77F 5) in accordance with specified test methods onspecimens cut from test laminates prepared as in 4.5.1. Reported averagevalues shall be based on four determinations for each requiremen
21、t.3.4.2.1 Tensile Strength: ASTM D 638 orASTM D 638MMinimum Average 38.2 ksi (263 MPa)Individual Minimum 32.2 ksi (222 MPa)3.4.2.2 Compressive Strength (Edgewise): 4.5.5Minimum Average 25.0 ksi (172 MPa)Individual Minimum 22.5 ksi (155 MPa)3.4.2.3 Flexural Strength: ASTM D 790 orASTM D 790MMinimum A
22、verage 46.0 ksi (317 MPa)Individual Minimum 41.4 ksi (285 MPa)3.4.2.4 Flexural Modulus: ASTM D 790 orASTM D 790MMinimum Average 2,100.0 ksi (145 GPa)Individual Minimum 2,000.0 ksi (140 GPa)3.4.2.5 Flame Resistance: (See 8.3)03.4.2.5.1 Vertical Test, 60 Second Ignition: ASTM F 5013.4.2.5.1.1 Time to
23、Extinguish after FlameRemoval, maximumMaximum Average 5.0 secondsIndividual maximum 6.0 seconds- 3 -Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AMS 3827BAMS 3827B3.4.2.5.1.2 Burn LengthMaximum
24、6.0 inches (152 mm)Individual maximum 7.2 inches (183 mm)3.4.2.5.1.3 Drip Flaming TimeMaximum average 3.0 secondsIndividual maximum 3.6 seconds3.4.2.5.2 Penetration Flame Test: 4.5.63.4.2.5.2.1 Time to Extinguish after FlameRemovalMaximum average 15 secondsIndividual average 18 seconds3.4.2.5.2.2 Ti
25、me of AfterglowMaximum average 10 secondsIndividual Average 12 seconds3.4.2.5.2.3 Penetration (Complete of Laminate) None3.4.2.6 Interlaminar Shear Strength: ASTM D 2344Minimum Average PreproductionValue -20%Individual minimum PreproductionValue -20%3.5 Quality: The cloth, as received by purchaser,
26、shall be uniform in quality andcondition, and free from foreign materials and from imperfections detrimentalto usage of the cloth.4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for Inspection: The vendor of cloth shall supply all samples0 for vendors tests and shall be responsible for performing
27、 all required tests.Purchaser reserves the right to sample and to perform any confirmatory testingdeemed necessary to ensure that the cloth conforms to the requirements of thisspecification.4.2 Classification of Tests:4.2.1 Acceptance Tests: Tests for uncured properties of impregnated cloth (3.4.1)a
28、nd for tensile strength (3.4.2.1), flexural strength (3.4.2.3), flameresistance (3.4.2.5.1 and 3.4.2.5.2), and interlaminar shear strength(3.4.2.6) of cured laminates are acceptance tests and shall be performed oneach lot.- 4 -Copyright SAE International Provided by IHS under license with SAENot for
29、 ResaleNo reproduction or networking permitted without license from IHS-,-SAE AMS 3827BAMS 3827B4.2.2 Preproduction Tests: Tests for all technical requirements are preproductiontests and shall be performed prior to or on the initial shipment of cloth toa purchaser, when a change in ingredients and/o
30、r processing requiresreapproval as in 4.4.2, and when purchaser deems confirmatory testing to berequired.4.2.2.1 For direct U.S. Military procurement, substantiating test data and, whenrequested, preproduction test material shall be submitted to the cognizantagency as directed by the procuring activ
31、ity, contracting officer, orrequest for procurement.4.3 Sampling and Testing: Shall be as follows:4.3.1 For Acceptance Tests:4.3.1.1 Frequency of Sampling: The vendor shall sample the cloth at randomaccording to the following schedule:Volatiles Each rollResin Solids Each rollGel Time Each rollResin
32、Flow Each rollTensile Strength Lot basisFlexural Strength Lot basisFlame Resistance Lot basisInterlaminar Shear Strength Lot basis4.3.1.2 Each roll of cloth offered for acceptance shall not exceed 250 yards(229 m) in length.4.3.1.3 A lot shall be all cloth treated at one time without changes in trea
33、tersettings using a single batch of resin and reinforcement and presented forvendors inspection at one time. An inspection lot shall not exceed 2000yards (1829 m). A lot may be packaged in smaller quantities and deliveredunder the basic lot approval provided lot identification is maintained.4.3.1.4
34、From the test laminates prepared as in 4.5.1, four specimens shall betaken, with the length of each specimen parallel to the warp, for eachrequirement for properties of the cured product.4.3.1.5 When a statistical sampling plan has been agreed upon by purchaser and0 vendor, sampling shall be in acco
35、rdance with such plan in lieu of samplingas in 4.3.1 and the report of 4.6 shall state that such plan was used.4.3.2 For Preproduction Tests: As agreed upon by purchaser and vendor.4.4 Approval:4.4.1 Sample cloth shall be approved by purchaser before cloth for production useis supplied, unless such
36、approval be waived by purchaser. Results of testson production cloth shall be essentially equivalent to those on the approvedsample.- 5 -Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AMS 3827BAMS
37、 3827B4.4.2 Vendor shall use ingredients, manufacturing procedures, processes, andmethods of inspection on production cloth which are essentially the same asthose used on the approved sample cloth. If necessary to make any change iningredients, in type of equipment for processing, or in manufacturin
38、gprocedures, vendor shall submit for reapproval a statement of the proposedchanges in ingredients and/or processing and, when requested, sample cloth.Production cloth made by the revised procedure shall not be shipped prior toreceipt of reapproval.4.5 Test Methods:4.5.1 Preparation of Test Laminates
39、: All test laminates shall be layed up with thewarp parallel and unnested so that the satin shafts of the warp always facethe top of the layup and shall be cured in accordance with resinmanufacturers recommendation. Laminates from which tensile specimens arecut shall be composed of eight plies and s
40、hall be not less than 14 inches(356 mm) in the warp direction. Laminates from which test specimens forcompressive strength, flexural strength, flexural modulus, and shear strengthare cut shall be composed of twelve plies and shall be not less than 12inches (305 mm) square. Laminates from which test
41、specimens for flameresistance are cut shall be composed of two plies and shall be not less than12 inches (305 mm) square.4.5.2 Volatile Content and Resin Solids Test: Volatile and resin content shall bedetermined by accurately weighing (W1) 4.0-inch (102-mm) square samples (orequivalent area) cut fr
42、om the cloth. Using porcelain crucibles previouslybrought to constant weight by igniting at 845C 25 (1553F 45), drysamples in a circulating air oven at 120C 5 (248F 9) for 15 minutes,cool in a desiccator, and reweigh (W2).Burn out resin in muffle furnace for 3 hours at 565C 25 (1050F 45) oruntil fab
43、ric is white. Cool in a desiccator and reweigh. Repeat the 565C(1050F) burn out as necessary to obtain constant weight (W3).Volatiles Content, % =Resin Solids Content, Volatile Free, % =4.5.3 Gel Time: Cut sufficient 2-inch (51-mm) square pieces across the rollwidth to make a sample approximately 0.
44、020 inch (0.51 mm) thick. Place thesample between sheets of suitable film and insert between the platens of apress which has been stabilized at 120C 5 (248F 9). Apply sufficientpressure to form a bead of resin around the sample. Timing shall begin assoon as pressure is applied. The resin bead shall
45、be probed at intervalswith a wire. Gelling will be preceded by the appearance, during probing,of long strands of resin. Probing shall be continued until these longstrands of resin no longer occur; the elapsed time shall be recorded as geltime.- 6 -(W1- W2) x 100W1(W2- W3) x.100W2Copyright SAE Intern
46、ational Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AMS 3827BAMS 3827B4.5.4 Resin Flow: Cut four 4.0-inch (102-mm) square pieces on the bias of clothand weigh to the nearest 0.01 gram (W1). Stack pieces between separators
47、heets, approximately 6 x 8 inches (152 x 203 mm) of aluminum foil, orequivalent, and reweigh pieces and foil to nearest 0.01 gram (W2).4.5.4.1 If the sample tends to stick to the separator sheets after curing, it ispermissible to use a nonvolatile mold release agent. Such agents may beused only unde
48、r conditions such that they do not undergo a weight lossgreater than 0.005 gram during curing.4.5.4.2 Place samples and separator sheets between press platens preheated to120C 3 (248F 5), taking care that the edges of all pieces remainproperly aligned. Apply pressure of 15 psi 1.25 (103 kPa 10) andh
49、old for 10 minutes while maintaining press platens at 120C 3(248F 5). Remove sample and cool in desiccator. Weigh sample withseparators to nearest 0.1 gram (W3). Remove separator and resin flash,trimming sample to original 4 x 4 inch (102 x 102 mm) size, taking carenot to remove any reinforcing fibers. Weigh sample to nearest 0.01gram (W4).4.5.5 Compressive Strength: Shall be determin
