1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. FEBRUARY 2014 Page 1 of 8 NAVISTAR, INC. Material, Parts, and Process Specificatio
2、ns (MPAPS) NUMBER: MPAPS DT-18 Former Designation: N/A TITLE: Environmental Testing for Interior Plastic Materials CURRENT REV No.: 1402 DATE: Feb. 2014 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: N/A PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CU
3、RRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability
4、 of regulatory limits prior to use. Change Notice: New 1.0 APPLICATION This document defines various environmental cycling and aging protocols for interior plastic trim components. 2.0 RESTRICTED CHEMICAL SUBSTANCES All product supplied to the requirements of this specification must comply with the
5、requirements of the MPAPS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following Specifications, Standards, and Regulations are referenced in this specification. NAVISTAR MPAPS B-50 4.0 REQUIREMENTS 4.1 Equipmen
6、t 4.1.1 Environmental Test Chamber The environmental test chamber(s) shall be capable of maintaining a temperature range of -40 +/-2C to 100 +/-2C and 93% relative humidity (RH) for a minimum of 24 hour increments. Chamber(s) shall also be large enough to hold entire component assemblies. Additional
7、ly, chamber(s) shall be capable of utilizing infrared (IR) heaters to maintain a constant 115C surface temperature for horizontal components. 4.1.2 Holding Fixtures Holding fixtures shall be sturdy in construction and capable of sustaining temperatures up to 120C for extended period of time. The fix
8、ture must support components with attachment points simulating the in-truck position. . 5.0 TEST METHODS Additional information of test cycles is available in MPAPS DT-18 Appendix (restricted). NUMBER: MPAPS DT-18 TITLE: ENVIRONMENTAL TESTING FOR INTERIOR PLASTIC MATERIALS REVISION: 1402 This docume
9、nt is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. FEBRUARY 2014 Page 2 of 8 5.1 Conditioning All materials shall be conditioned in a controlled
10、 atmosphere of 23 +/-2C and 50 +/-5% RH for at least 24 hours prior to testing. 5.2 Test Procedures 5.2.1 Test procedures described are recommended. Alternative temperatures and time periods may be specified by Navistar Design and Materials Engineering. 5.2.2 All components shall be mounted with att
11、achment points simulating in-truck use. 5.2.3 Interior components are divided into three regions based on location as shown in Figure 1a-c for the driver environment and sleeper regions. Region A (red) depicts areas of direct sunlight above the belt line. Region B (yellow) depicts areas of direct li
12、ght below the belt line. Region C (blue) depicts areas of indirect sunlight. Figure 1: Three regions of the interior cab defined by location and extent of sun exposure. The driver environment (a and b) and sleeper region (c) are shown. 5.2.4 Full components shall be tested. If a full component conta
13、ins materials in multiple regions, the component shall be tested to the procedure in the highest temperature region. If the entire cab is tested at once, then all components must meet the dimensional stability requirements of Test Cycle 1. Additionally, if the entire cab is tested in one chamber, th
14、e IP assembly would still need to be tested with Test Cycle 4 in addition to Test Cycle 1. Exceptions need approval from Navistar Design and Materials Engineering. 5.2.5 Test Cycle Applicability is outlined in Table 1 below. NUMBER: MPAPS DT-18 TITLE: ENVIRONMENTAL TESTING FOR INTERIOR PLASTIC MATER
15、IALS REVISION: 1402 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. FEBRUARY 2014 Page 3 of 8 Table 1: Test Cycle Applicability Te
16、st Cycle Use 1 Dimensional stability of regions of direct sunlight above belt line (region A) 2 Dimensional stability of direct sunlight below belt line (region B) 3 Dimensional stability of indirect light regions (region C) 4 Temperature and Irradiation cycle for IP and Door Trim 5.2.6 Cycle 1: Dim
17、ensional stability of regions of direct sunlight above belt line. To be used to evaluate the dimensional stability of finished interior trim panels. The number of repeat samples necessary shall be specified on the engineering drawing as well as significant characteristic locations or locations requi
18、ring measurement. 5.2.6.1 Application. All interior components shown in region 1 (red) or Figure 1, including steering wheel, top of IP, sun visors, top of door trim. 5.2.6.2 Requirement. The test component shall exhibit no significant surface changes, particularly changes in color or gloss, no crac
19、king, crazing, or any other changes detrimental to serviceability. Objectionable odors, bubbling or void formation, delamination or peeling, shrink, and warp are also unacceptable. The test piece shall comply with the dimensions and tolerances specified on the drawings after completion of the test.
20、The dimensions of the entire test panel shall be checked for test compliance by the naked eye. Additionally, significant characteristic locations or locations requiring measurement shall be measured in both the x/y plane as well as in the z-direction through the x/y plane. Measurements shall be made
21、 with respect to a reference spot also indicated on the engineering drawing. All measurements shall be included in the test report for approval. 5.2.6.3 Procedure. Test pieces shall be fixtured to simulate actual installed service conditions with appropriate constraints to simulate the interfacing c
22、omponents. The complete assembly shall undergo the cycle shown in Table 2. The test cycle may be commenced at any of the individual stages provided the full cycle is sequentially completed. The cycle shall be carried out without interruption. If interruption is necessary, the part is allowed to set
23、at ambient conditions during the interruption. This adjustment shall be noted in the test report. 5.2.7 Cycle 2: Dimensional stability of direct sunlight below belt line. To be used to evaluate the dimensional stability of finished interior trim panels. The number of repeat samples necessary shall b
24、e specified on the engineering drawing as well as significant characteristic locations or locations requiring measurement. 5.2.7.1 Application. All interior components shown in region 2 (yellow) or Figure 1, including door trim assembly, full IP and dashboard, sun visors, plastic seat components, et
25、c. 5.2.7.2 Requirement. The test component shall exhibit no significant surface changes, particularly changes in color or gloss, no cracking, crazing, or any other changes detrimental to serviceability. Objectionable odors, bubbling or void formation, delamination or peeling, shrink, and warp are al
26、so unacceptable. The test piece shall comply with the dimensions and tolerances specified on the drawings after completion of the test. The dimensions of the entire test panel shall be checked for test compliance by the naked eye. Additionally, significant characteristic locations or locations requi
27、ring measurement shall be measured in both the x/y plane as well as in the z-direction through the x/y plane. Measurements shall be made with respect to a reference spot also indicated on the engineering drawing. All measurements shall be included in the test report for approval. NUMBER: MPAPS DT-18
28、 TITLE: ENVIRONMENTAL TESTING FOR INTERIOR PLASTIC MATERIALS REVISION: 1402 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. FEBRUA
29、RY 2014 Page 4 of 8 5.2.7.3 Procedure. Test pieces shall be fixtured to simulate actual installed service conditions with appropriate constraints to simulate the interfacing components. The complete assembly shall undergo the cycle shown in Table 3. The test cycle may be commenced at any of the indi
30、vidual stages provided the full cycle is sequentially completed. The cycle shall be carried out without interruption. If interruption is necessary, the part is allowed to set at ambient conditions during the interruption. This adjustment shall be noted in the test report. 5.2.8 Cycle 3: Dimensional
31、stability of indirect light regions. To be used to evaluate the dimensional stability of finished interior trim panels. The number of repeat samples necessary shall be specified on the engineering drawing as well as significant characteristic locations or locations requiring measurement. 5.2.8.1 App
32、lication. All interior components shown in region 3 (blue) or Figure 1, including headliner, engine cover, seat base, lower IP, cabinets, sleeper cab region, etc. 5.2.8.2 Requirement. The test component shall exhibit no significant surface changes, particularly changes in color or gloss, no cracking
33、, crazing, or any other changes detrimental to serviceability. Objectionable odors, bubbling or void formation, delamination or peeling, shrink, and warp are also unacceptable. The test piece shall comply with the dimensions and tolerances specified on the drawings after completion of the test. The
34、dimensions of the entire test panel shall be checked for test compliance by the naked eye. Additionally, significant characteristic locations or locations requiring measurement shall be measured in both the x/y plane as well as in the z-direction through the x/y plane. Measurements shall be made wit
35、h respect to a reference spot also indicated on the engineering drawing. All measurements shall be included in the test report for approval. 5.2.8.3 Procedure. Test pieces shall be fixtured to simulate actual installed service conditions with appropriate constraints to simulate the interfacing compo
36、nents. The complete assembly shall undergo the cycle shown in Table 4. The test cycle may be commenced at any of the individual stages provided the full cycle is sequentially completed. The cycle shall be carried out without interruption. If interruption is necessary, the part is allowed to set at a
37、mbient conditions during the interruption. This adjustment shall be noted in the test report. 5.2.9 Cycle 4: Temperature and irradiation cycle for IP and door trim. To be used to determine the impact of temperature, humidity, and direct heating on IP assembly. The number of repeat samples necessary
38、shall be specified on the engineering drawing as well as significant characteristic locations or locations requiring measurement. 5.2.9.1 Application. The entire IP and door assemblies. Irradiation set point of 115C shall apply to the highest horizontal surface on the IP or door trim adjacent to the
39、 window, or as indicated in engineering drawings. 5.2.9.2 Requirement. The test component shall exhibit no significant surface changes, particularly changes in color or gloss, no cracking, crazing, or any other changes detrimental to serviceability. Objectionable odors, bubbling or void formation, d
40、elamination or peeling, shrink, and warp are also unacceptable. The test piece shall comply with the dimensions and tolerances specified on the drawings after completion of the test. The dimensions of the entire test panel shall be checked for test compliance by the naked eye. Additionally, signific
41、ant characteristic locations or locations requiring measurement shall be measured in both the x/y plane as well as in the z-direction through the x/y plane. Measurements shall be made with respect to a reference spot also indicated on the engineering drawing. All measurements shall be included in th
42、e test report for approval. NUMBER: MPAPS DT-18 TITLE: ENVIRONMENTAL TESTING FOR INTERIOR PLASTIC MATERIALS REVISION: 1402 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all
43、patent liability. 2014 by Navistar, Inc. FEBRUARY 2014 Page 5 of 8 5.2.9.3 Procedure. Test pieces shall be fixtured to simulate actual installed service conditions with appropriate constraints to simulate the interfacing components. The complete assembly shall undergo the cycle shown in Table 5. IR
44、lamps shall be used to heat the top horizontal surface of the IP to 115C while the oven shall be controlled to 90C. The test cycle may be commenced at any of the individual stages provided the full cycle is sequentially completed. The cycle shall be carried out without interruption. If interruption
45、is necessary, the part is allowed to set at ambient conditions during the interruption. This adjustment shall be noted in the test report. Table 2: Cycle 1 Dimensional Stability of Regions of Direct Sunlight, Above Belt Line Step Temp (C) RH (%) time (hrs) 1 95 50 24 2 ambient not controlled 1 3 105
46、 not controlled 24 4 ambient not controlled 1 5 -40 not controlled 4 6 ambient not controlled 1 7 95 50 24 8 ambient not controlled 1 9 105 not controlled 24 10 ambient not controlled 1 11 -40 not controlled 4 12 ambient not controlled 1 13 105 not controlled 168 14 70 93 42 Total 320 NUMBER: MPAPS
47、DT-18 TITLE: ENVIRONMENTAL TESTING FOR INTERIOR PLASTIC MATERIALS REVISION: 1402 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. F
48、EBRUARY 2014 Page 6 of 8 Table 3: Cycle 2 Dimensional Stability of Regions of Direct Sunlight, Below Belt Line Step Temp (C) RH (%) time (hrs) 1 95 50 24 2 ambient not controlled 1 3 95 not controlled 24 4 ambient not controlled 1 5 -40 not controlled 4 6 ambient not controlled 1 7 95 50 24 8 ambien
49、t not controlled 1 9 95 not controlled 24 10 ambient not controlled 1 11 -40 not controlled 4 12 ambient not controlled 1 13 95 not controlled 168 14 70 93 42 Total 320 NUMBER: MPAPS DT-18 TITLE: ENVIRONMENTAL TESTING FOR INTERIOR PLASTIC MATERIALS REVISION: 1402 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume al
