1、 WORLDWIDE ENGINEERING STANDARDS General Specification GMW16740 Harness Tape Copyright 2012 General Motors Company All Rights Reserved November 2012 Originating Department: North American Engineering Standards Page 1 of 12 1 Introduction Note: Nothing in this standard supercedes applicable laws and
2、regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Scope. There is no international or national equivalent to this standard. 1.2 Mission/Theme. This standard specifies dimensions, test methods and requirements for ha
3、rness tapes. 1.3 Classification. 1.3.1 Temperatures. Class designations have been defined in Table 1 to classify the various temperature ranges encountered in/on vehicles. Table 1: Temperature Classes Class Operating Temperature Long-term Aging Temperature 3000 h Short-term Aging Temperature 240 h O
4、verload Aging Temperature 6 h A (-40 to +85) C (+85 2) C (+110 2) C (+135 3) C B (-40 to +100) C (+100 2) C (+125 3) C (+150 3) C C (-40 to +125) C (+125 3) C (+150 3) C (+175 3) C D (-40 to +150) C (+150 3) C (+175 3) C (+200 3) C E (-40 to +175) C (+175 3) C (+200 3) C (+225 4) C F (-40 to +200) C
5、 (+200 3) C (+225 4) C (+250 4) C G (-40 to +225) C (+225 4) C (+250 4) C (+275 4) C H (-40 to +250) C (+250 4) C (+275 4) C (+300 4) C 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. DIN 70070 ISO 2286 ISO 6931-
6、1 EN 1942 ISO 4925 ISO 29862 EN 1944 ISO 6722 ISO 29864 2.2 GM Standards/Specifications. GMW3059 GMW3205 GMW3235 GMW15626 GMW3176 GMW3232 GMW8081 3 Test Preparation and Evaluation 3.1 Resources. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleN
7、o reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16740 Copyright 2012 General Motors Company All Rights Reserved November 2012 Page 2 of 12 3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a va
8、lid calibration label. 3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variables as specified in this standard shall be determined correctly with respect to their physical definition. 3.1.3 Facilities. 3.1.3.1 Ovens. When an oven is required, a
9、naturally ventilated oven shall be used. 3.1.4 Equipment. As specified in each test. 3.1.5 Test Vehicle/Test Piece. Number of test pieces as specified in each paragraph. No parts out of prototype tools shall be used. Discard the first three layers of tape from the roll to be tested before removing t
10、he test material. For each test, only specimens shall be used which, at the start of the test, are not older than 6 months, and have not been used in previous test. 3.1.6 Test Time. As specified in each test. 3.1.7 Test Required Information. Not applicable. 3.1.8 Personnel/Skills. Not applicable. 3.
11、2 Preparation. See each individual test. 3.3 Conditions. 3.3.1 Environmental Conditions. If not otherwise specified, all test samples shall be maintained at (+23 5) C and a relative humidity of (50 20)% for 24 h before the start of any test sequence 3.3.2 Test Conditions. Deviations from the require
12、ments of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. Test pieces for all tests shall be preconditioned for at least 16 h at a temperature of (+23 5) C and a relative humidity of (45 to 75)%. Unless otherwise
13、specified, all tests other than “in process” tests shall be performed at this temperature. Where no tolerance is specified, all values shall be considered to be approximate. 3.4 Instructions. Not applicable. 3.5 Data. Not applicable. 3.6 Safety. This standard may involve hazardous materials, operati
14、ons, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 3.7 Docume
15、ntation. Samples of components or material released to this standard shall be tested for conformity with the requirements of this standard and approved by the responsible GM Department prior to the start of delivery of production level components or materials. Any change to the component or material
16、, e.g., design, function, properties, manufacturing process and/or location of manufacture requires a new release of the product. It is the sole responsibility of the supplier to provide the customer, unsolicited, with documentation of any change or modification to the product/process, and to apply
17、for a new release. If not otherwise agreed to, the entire verification test shall be repeated and documented by the supplier prior to start of delivery of the modified or changed product. In some cases, a shorter test can be agreed to between the responsible GM department and the supplier. 3.7.1 Tes
18、t Results. Test results shall be reported in a test report (see example in GMW15626). The test report shall include as minimum: Name of the supplier. Date. Designation of product. International Material Data System Identification (IMDS ID) and information, if the IMDS datasheet has been approved by
19、the customer. Test result and interpretation of test result. 3.7.2 Deviations from Test Procedure. Deviations from the requirements of the test procedures shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. Copyright General Motor
20、s Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16740 Copyright 2012 General Motors Company All Rights Reserved November 2012 Page 3 of 12 4 Requirements and Pr
21、ocedure 4.1 Material. The tape shall comply with the requirements of this standard for a period of six month storing, and be protected from direct solar light. 4.2 Marking. Every individual roll of tape shall be marked with the name of the supplier. 4.3 Dimensions. 4.3.1 Total Thickness. The test sh
22、all be performed according to EN 1942. For compressible noise damping tapes, the test shall be performed also according to ISO 2286. 4.3.1.1 Interpretation of Results. No single value shall exceed the value given in Appendix A. 4.3.2 Tape Width. 4.3.2.1 Test Sample. Prepare two test samples of 450 m
23、m each. 4.3.2.2 Apparatus. A steel scale having divisions at 0.5 mm intervals. 4.3.2.3 Procedure. Place the test specimen, without tension or pressure, adhesive side down on a hard smooth surface. Measure the width perpendicular to the edge with the steel scale at three approximately equally-spaced
24、points along the length. 4.3.2.4 Interpretation of Results. The width shall be in accordance with Appendix A. The width deviation shall be less than ( 1) mm. 4.4 Tensile Strength and Elongation. 4.4.1 The test shall be performed according to ISO 29864, but with the following changes: 4.4.1.1 Test Sa
25、mple. Prepare five samples, 200 mm long and same width as the tape. For widths 25 mm, a test piece 25 mm wide shall be cut longitudinally from the adhesive tape. Use a sharp knife to obtain clean-cut edges. 4.4.1.2 Interpretation of Results. See Appendix A. 4.5 Unwind Force. The test shall be perfor
26、med according to EN 1944. 4.5.1 Interpretation of Results. See Appendix A. 4.6 Adhesion to Steel. This test is performed according to ISO 29862, process 1, 180 test. 4.6.1 Test Sample. Prepare three samples, 300 mm long and same width as the tape. For widths 25 mm, a test piece 25 mm wide shall be c
27、ut longitudinally from the adhesive tape. Use a sharp knife to obtain clean-cut edges. 4.6.2 Procedure. The peel adhesion is expressed in N/25 mm width of tape. 4.6.3 Interpretation of Results. See Appendix A. 4.7 Adhesion to Backing. 4.7.1 This test shall be performed according to ISO 29862, proces
28、s 2, 180 test, adhesion to backing. The peel adhesion is expressed in N/25 mm width of tape. 4.7.1.1 Test Sample. Prepare 3 (+ 3) samples, 300 mm long and same width as the tape. For widths 25 mm, a test piece 25 mm wide shall be cut longitudinally from the adhesive tape. Use a sharp knife to obtain
29、 clean-cut edges. 4.7.1.2 Interpretation of Results. See Appendix A. 4.8 Bending Test. 4.8.1 Bending Test Piece after Short-term Aging. 4.8.1.1 Test Sample. Three (3) test pieces shall be made up of 16 electric cables with a conductor area of 0.35 mm2. All the cables for this test shall be ethylene
30、tetrafluoroethylene (ETFE). When testing tapes in temperature classes E, F, G, and H, contact the responsible GM department for information about which cables are to be used in the test. The length of the cables shall be 600 mm. The electric cables shall be bundled by tight winding. The tape shall b
31、e applied on the test pieces starting from the bottom, each turn overlapping the preceding one by one half the width of the tape. See Figure 1. 4.8.1.2 Procedure. The test piece shall be conditioned for 24 h at a temperature of (+23 5) C and a relative humidity of (50 5)%. Place the test pieces, in
32、a vertically orientation, in a hot oven with natural draught at a temperature specified in Table 1 for 240 h. The air contained shall be completely changed at least 8 times per hour but not more than 20 times per hour. The samples shall be separated by 50 mm from each Copyright General Motors Compan
33、y Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16740 Copyright 2012 General Motors Company All Rights Reserved November 2012 Page 4 of 12 other and from the inner surf
34、ace of the oven. After aging, the test piece shall be stored at a temperature of (+23 5) C for 6 h and then bent over a 30 mm mandrel possessing the same temperature. The test samples shall be wound 720. The time for winding 360 shall be 60 s. Thereafter, the test piece shall be examined visually. 4
35、.8.1.3 Interpretation of Results. The test piece shall not show any spread of adhesive, cracks, flagging, or other failure. Table 2: Type of Cables to be Used in Bending Test Number of Cables from Each Cable Class Tape Class ETFE (Class E) XLPE (Class D) XLPE (Class C) PP (Class C) PVC (Class B) Cla
36、ss A Tape 4 - 4 4 4 Class B Tape 4 - 4 4 4 Class C Tape 4 4 4 4 - Class D Tape 4 12 - - - Legend: ETFE = Ethylene Tetrafluoroethylene, XLPE = Cross-Link Polymer, PP = Polypropylene, PVC = Polyvinyl Chloride Figure 1: Test Piece 4.8.2 Bending Test Piece after Long-term Aging. 4.8.2.1 Test Sample. See
37、 4.8.1.1. However, test sample construction shall be as shown in Table 2. 4.8.2.2 Procedure. The test piece shall be conditioned for 24 h at a temperature of (+23 5) C and a relative humidity of (50 5)%. Place the test pieces, in a vertically orientation, in a hot oven with natural draught at a temp
38、erature specified in Table 1 for 3000 h. The air contained shall be completely changed at least 8 times per hour but not more than 20 times per hour. The samples shall be separated by 50 mm from each other and from the inner surface of the oven. Test pieces made of different tape materials shall not
39、 be tested at the same time. After aging, the test piece shall be stored at (+23 5) C for 6 h and then bent, still at (+23 5) C, over a mandrel with a diameter of 30 mm. The test samples shall be wound 720. The time for winding 360 shall be 60 s. Thereafter, the test piece shall be examined visually
40、. 4.8.2.3 Interpretation of Results. The test piece shall not show any spread of adhesive, cracks, flagging, or other failure. 4.8.3 Bending Test Piece after Overload Temperature Aging. 4.8.3.1 Test Sample. See 4.8.1.1, but all cables for this test shall be ETFE. 4.8.3.2 Procedure. The test piece sh
41、all be conditioned for 24 h at a temperature of (23 5) C and a relative humidity of (50 5)%. Place the test pieces, in a vertical orientation, in a hot oven with natural draught at a temperature specified in Table 1 for 6 h. The air contained shall be completely changed at least eight times per hour
42、 but not more than 20 times per hour. The samples shall be separated by 50 mm from each other and from the inner surface of the oven. After aging, the test piece shall be stored at (23 5) C for 6 h and then bent over a mandrel with a diameter of 30 mm. The test samples shall be wound 720. The time f
43、or winding 360 shall be 60 s. Thereafter, the test piece shall be examined visually. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW1674
44、0 Copyright 2012 General Motors Company All Rights Reserved November 2012 Page 5 of 12 4.8.3.3 Interpretation of Results. The test piece shall not show any spread of adhesive, cracks, flagging, or other failure. 4.8.4 Cold Bending Test. 4.8.4.1 Test Sample. See 4.8.1.1. However, test sample construc
45、tion shall be as shown in Table 2. 4.8.4.2 Apparatus. Freezing chamber. 4.8.4.3 Procedure. The test piece shall be stored at a temperature of -40 C for 6 h and then bent, still at -40 C, over a mandrel possessing the same temperature. The diameter of the mandrel shall be 30 mm. The test samples shal
46、l be wound 720. The time for winding 360 shall be 60 s. Thereafter, the test piece shall be examined visually. For the PVC tapes, there can be a problem to fulfill the requirements for -40 C. If the PVC tape fails at -40 C, perform the test at -25 C. 4.8.4.4 Interpretation of Results. The test piece
47、 shall not show any cracks or other fractures. 4.9 Abrasion Resistance. 4.9.1 Needle Abrasion. The test is done according to ISO 6722, with the following amendments. 4.9.1.1 Test Sample. The 100 mm of tape shall be applied in a single layer to a steel mandrel with a diameter of 5 mm, which is placed
48、 into the equipment. Five (5) test samples shall be prepared. 4.9.1.2 Apparatus/Procedure. The test rig (see ISO 6722) shall fulfill the following requirements: Diameter of needle: (0.45 0.01) mm. Type of needle: Spring wire according to ISO 6931-1. Frequency: (55 5) cycles/minute (one cycle consists of one reciprocating movement). Length of abrasion: (15 1) mm. Type of movement: Design details shall not influence the test result. Position of weight, design details, mass: The vertical force on the test piece shall be constant under dynamic conditions. Tape mounting force: The test sample s
