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1、SAE Technical Standards 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 patent infringement arising therefr
2、om, 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 your written comments and suggestions. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1998 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 STANDARD Submitted for recognition as an American National Sta
4、ndard J19 REV. AUG1997 Issued1960-09 Revised1997-08 Superseding J19 JAN85 (R) Latex-Dipped Goods and Coatings for Automotive Applications 1.Scope 1.1These specifications cover dipped goods and coatings made from compounded latex. Products manufactured from this material include boots, coated clips,
5、coated sponge parts, and coated fabrics for automotive applications. 1.2The compounds listed in Tables 1 and 2 are grouped into classifications based primarily on physical properties which are prescribed in the tables. These values, together with any additional requirements, indicated by suffix lett
6、ers in the grade designations as described in Section 3, define the properties of the compounds after vulcanization. These values apply to test specimens obtained from standard laboratory dipped films prepared in accordance with procedures described in the applicable ASTM test methods. Test results
7、from finished products may not duplicate the values obtained from standard test films. When differences due to the difficulty in obtaining suitable test specimens from the finished part arise, the purchaser and the supplier may agree on acceptable deviations. This can be done by comparing results ob
8、tained on standard test films with those obtained on actual parts. TABLE 1PHYSICAL REQUIREMENTS OF TYPE LR COMPOUNDS, NON-OIL RESISTANT CHARACTERISTICREQUIREMENT Grade NumberLR 420 Durometer Hardness45 5 Tensile Strength, Min MPa (psi)14.0 (2000) Ultimate Elongation, Min %500 Heat Aged 70 h at 70 C
9、(158 F) Change in Durometer Hardness, Max points5 Tensile Strength, Min MPa (psi)10.5 (1500) Ultimate Elongation, Min %400 Permanent Set at 400% Elongation, Max %10 SAE J19 Revised AUG1997 -2- 2.References 2.1Applicable PublicationsThe following publications form a part of this specification to the
10、extent specified herein. 2.1.1ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM D 412Tests for Rubber Properties in Tension ASTM D 471Test for Rubber PropertyEffect of Liquids ASTM D 573Test for Rubber Deterioration in an Air Oven ASTM D 925Test for
11、Rubber PropertyStaining of Surfaces (Contact, Migration, and Diffusion) ASTM D 2137Test for Rubber PropertyBrittleness Point of Flexible Polymers and Coated Fabrics ASTM D 2240Test for Rubber PropertyDurometer Hardness 3.Types, Classes, and Grades of Compounds 3.1TypesThese specifications cover two
12、types of compounds designated by the prefix letters LR and LS as follows: 3.1.1TYPE LRCompounds made from natural rubber, synthetic rubber, or rubberlike materials, alone or in combination, for services where specific resistance to the action of petroleum-base fluids is not required. 3.1.2TYPE LSCom
13、pounds made from synthetic rubber or rubberlike materials for services where specific resistance to the action of petroleum-base fluids is required. 3.2ClassesType LR compounds are of one class only. Type LS compounds were divided into two classes, LSB and LSC. Class LSB has since been deleted. 3.2.
14、1CLASS LSCCompounds made from synthetic rubber or rubberlike materials having medium volume swell in low aniline point oils. TABLE 2PHYSICAL REQUIREMENTS OF TYPE LS COMPOUNDS, CLASS LSC, OIL RESISTANT CHARACTERISTICREQUIREMENT Grade NumberLSC 515 Basic Requirements Durometer Hardness, Points55 5 Ten
15、sile Strength, Min MPa (psi)10.5 (1500) Ultimate Elongation, Min %400 Oil Immersion 22 h at 100 C (212 F), ASTM Oil No. 2, Volume Change, Max %80 Heat Aged 70 h at 100 C (212 F) Change in Durometer Hardness, Max Points+10 Tensile Strength, Min MPa (psi)8.5 (1200) Ultimate Elongation, Min %300 Perman
16、ent Set at 300% Elongation, Max %20 Added Requirements Suffix E2, 22 h at 100 C (212 F) in ASTM Oil No. 2, Volume Change, Max %50 SAE J19 Revised AUG1997 -3- 3.3GradesEach of the compounds may have a number of different grades, each having different physical properties. The grade shall be designated
17、 by a grade number following the prefix letters and, when necessary, by suffix letters after the grade number. 3.4Suffix LettersSuffix letters may be added singly or in combination after any grade number to indicate additional requirements beyond those specified in the tables as basic requirements f
18、or that particular grade. If no value for the suffix letter requirements is specified in the table, or when no method of test is provided, agreement as to the required value and method of test must be arranged between the purchaser and the supplier. See Table 3. 4.Materials and WorkmanshipAll materi
19、als and workmanship shall be in accordance with good commercial practice, and the resulting product shall be free of bubbles, voids, foreign matter, or other defects affecting serviceability. 5.ColorUnless otherwise specified, these compounds shall be black and free from objectionable bloom. 6.Metho
20、ds of TestingThe properties enumerated in these specifications shall be determined in accordance with the following methods of the American Society for Testing and Materials, except as modified in accordance with certain provisions stated herein. All exposure periods and temperatures prescribed in T
21、ables 1 and 2 shall be given preference over those specified in the ASTM methods (latest issue). 6.1Standard Test Film PreparationStandard test films shall be prepared using procedures (coagulation, leach, dry, and cure) identical to the preparation of production parts except thickness which shall b
22、e 0.63 to 0.75 mm (0.025 to 0.030 in). 6.2Durometer HardnessASTM D 2240, Test for Rubber PropertyDurometer Hardness, (Type A), except plied up thickness of test specimen to be between 4.5 and 6.3 mm (0.175 and 0.250 in). 6.3Tensile Strength, Elongation, and Tension SetASTM D 412, Tests for Rubber Pr
23、operties in Tension, using Die C. Film thickness to be 0.63 to 0.75 mm (0.025 to 0.030 in). 6.4Immersion, Including Suffix E2ASTM D 471, Test for Rubber PropertyEffect of Liquids. 6.5Heat AgingASTM D 573, Test for Rubber Deterioration in an Air Oven. 6.6Low-Temperature BrittlenessSuffix F1ASTM D 213
24、7, nonbrittle after 3 min at 40 C except specimen thickness to be 0.63 to 0.75 mm (0.025 to 0.030 in). TABLE 3SUFFIX LETTERS AND TEST REQUIRED Suffix LettersTest Required C1Ozone Resistance E2Oil ResistanceASTM Oil No. 2 F1Low-Temperature Brittleness at 40 C (40 F) GTear Resistance HFlex Resistance
25、K1Adhesion to MetalBond made during vulcanization K2AdhesionCemented bond made after vulcanization PNonstaining ZSpecial Requirements SAE J19 Revised AUG1997 -4- 6.7Non-Staining, Suffix PASTM D 925, Tests for Rubber PropertyStaining of Surfaces (Contact, Migration, and Diffusion). 7.Sampling and Ins
26、pection 7.1A lot, unless otherwise specified, shall consist of all products of the same composition and same grade submitted for inspection at the same time. 7.2Sampling and inspection of the material shall be agreed upon by the purchaser and the supplier as part of the purchase contract. 8.Notes 8.
27、1Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions have been made to the previous issue of the report. An (R) symbol to the left of the document title indicates a complete revision of the report. PREPARED BY T
28、HE SAE COMMITTEE ON AUTOMOTIVE RUBBER SPECIFICATIONS SAE J19 Revised AUG1997 RationaleSAE J19 has been revised to: Comply with the new SAE Technical Standards Board format. This includes adding References to Section 2. All other section numbers have changed. Metric is first, followed by english unit
29、s in parentheses. Paragraph 3.2 ClassesChanged to the following: Type LR compounds are of one class only. Type LS compounds were divided into two classes, LSB and LSC. Class LSB has since been deleted. The following paragraphs were changed to show metric preference, and to change “sample“ to “speeci
30、men.“ Paragraph 6.1“.thickness fo test specimen to be between 4.5 and 6.3 mm (0.175 and 0.250 in).“ Paragraph 6.3“Film thickness to be 0.63 to 0.75 mm (0.025 to 0.030 in).“ Paragraph 5.6“.except specimen thickness to be 0.63 to 0.75 mm (0.025 to 0.030 in).“ The tensile rrequirement in Table 1 for LR
31、420 material should be stated as 14.0 MPa instead of 14 MPa. Footnote 1deleted due to the change in 3.2. Paragraph 3.2.1“Class LSB“ reference was deleted. Relationship of SAE Standard to ISO StandardNot applicable. ApplicationThese specifications cover dipped goods and coatings made from compounded
32、latex. Products manufactured from this material include boots, coated clips, coated sponge parts, and coated fabrics for automotive applications. The compounds listed in Tables 1 and 2 are grouped into classifications based primarily on physical properties which are prescribed in the tables. These v
33、alues, together with any additional requirements, indicated by suffix letters in the grade designations as described in Section 3, define the properties of the compounds after vulcanization. These values apply to test specimens obtained from standard laboratory dipped films prepared in accordance wi
34、th procedures described in the applicable ASTM test methods. Test results from finished products may not duplicate the values obtained from standard test films. When differences due to the difficulty in obtaining suitable test specimens from the finished part arise, the purchaser and the supplier ma
35、y agree on acceptable deviations. This can be done by comparing results obtained on standard test films with those obtained on actual parts. SAE J19 Revised AUG1997 Reference Section ASTM D 412Tests for Rubber Properties in Tension ASTM D 471Test for Rubber PropertyEffect of Liquids ASTM D 573Test f
36、or Rubber Deterioration in an Air Oven ASTM D 925Test for Rubber PropertyStaining of Surfaces (Contact, Migration, and Diffusion) ASTM D 2137Test for Rubber PropertyBrittleness Point of Flexible Polymers and Coated Fabrics ASTM D 2240Test for Rubber PropertyDurometer Hardness Developed by the SAE Committee on Automotive Rubber Specifications