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. 2015 by Navistar, Inc. December 2015 Page 1 of 11 NAVISTAR, INC. Material, Parts, and Process Specificat
2、ions (MPAPS) NUMBER: MPAPS K-6915 Former Designation: TMS-6915 TITLE: Heat Curing Sealant, Body Cabs CURRENT REV No.: 1512 DATE: Dec. 2015 WRITTEN/EDITED BY: S. Brailey APPROVED BY: R. Goluch SUPERSEDES: Rev. 0902 February 2009 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION Th
3、is 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 of regulatory li
4、mits prior to use. Change Notice: Updated to MPAPS format, changed approved sources table; editorial changes 1.0 APPLICATION This specification outlines the requirements for several types of non-solvent, heat-cured plastisol type sealants used in truck cab applications prior to finish paint. 2.0 SCO
5、PE This specification covers the general requirements, property and performance requirements, quality, source approval and quality control requirements for the various plastisol sealants, and all approved source lists. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplie
6、d to the requirements of this specification must comply with the requirements of the CEMS 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
7、specification. Quality System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 NAVISTAR MPAPS P-9543 NAVISTAR MPAPS G-5 ASTM D5 ASTM D471 NAVISTAR Manufacturing Std. MS-D-13 NAVISTAR MPAPS K-6927 ASTM D2240 NAVISTAR Engineering Design Std A-16 NAVISTAR TMS-9013 ASTM D412 NAVISTAR CEMS B-50 NAVI
8、STAR TMS-6925 ASTM B117 NAVISTAR MPAPS A-6 NAVISTAR MPAPS C-10 ASTM G154 NAVISTAR MPAPS GT-Paint NAVISTAR TMS-9010 ASTM D792 SAE J243 NAVISTAR TMS 6916 ASTM D1000 SAE J1524 NAVISTAR MPAPS K-6900 SAE J1523 4.0 REQUIREMENTS 4.1 Description of Types A description of the sealant types, their cure temper
9、atures, and design guidance in the selection of the proper type to be used in each application, is included in the General Information (section A.0) at the end of this specification. NUMBER: MPAPS K-6915 TITLE: Heat Curing Sealant, Body Cabs REVISION: 1512 This document is restricted and may not be
10、sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. December 2015 Page 2 of 11 4.2 Uncured Sealant Properties The requirements for uncured sealant properties have been outlined
11、in Table 3 at the end of this specification. 4.2.1 Solids 4.2.1.1 Method: SAE J243 Procedure ADS-7, Method A 4.2.1.2 Required: See table 3. 4.2.2 Density 4.2.2.1 Method: ASTM D792, Method A 4.2.2.2 Required: See table 3. 4.2.3 Viscosity 4.2.3.1 Method A: SAE J243, Procedure ADS-1, Agitated - Conditi
12、oning Method C, Pressure Flow Method (Unless Otherwise Indicated), 275 kPa (40 psi), 25 1C (77 2F), 20 g. 4.2.3.1.1 Types I, III, IIIA, IIIB, VI: 2.64 mm (0.104 in) Orifice 4.2.3.1.2 Type IL, IIA: 1.32 mm (0.052 in) Orifice 4.2.3.2 Method B: (Types II, IIL only) SAE J243, ADS-1, Test 2.2 Brookfield,
13、 spindle 7, 50 RPM 4.2.3.3 Method C: (Types IV, IVL only) ASTM D5 Penetration Method, 100 g T.M.L., 5 sec. 4.2.3.4 Required: See table 3. 4.2.4 Aged Viscosity 4.2.4.1 Method: Age sample at 43 1C (110 2F) for 72 hours. Test per corresponding method on section 4.2.3. 4.2.4.2 Required: See table 3. 4.2
14、.5 Process Compatibility and Topcoat compatibility for other types. Uncured, Type III sealer/adhesive shall remain in joints without flow or washout through the spray and immersion stages of pre-treat and E-coat as required under TMS-9013. It shall be the suppliers responsibility to work with E-coat
15、 primer and pretreatment suppliers to determine that Type III sealer/adhesive will not cause contamination of these process baths. 4.2.6 Cleaning The uncured sealant shall clean readily from metal surface, without streaking, when wiped with a cloth dampened with mineral spirits or isopropanol. 4.2.7
16、 Odor It shall be the suppliers responsibility to determine that the constituent material and finished product are deemed to be non-objectionable and meet all safety standards. 4.2.8 Storage Life This material shall have a storage life of no less than 90 days when stored at a temperature less than 3
17、2C (90F) without thickening or having a deleterious effect on the performance of the product. Agreements must be made between the supplier and user as to satisfactory storage life of the material in the event longer storage periods are required. 4.3 Property and Performance Requirements 4.3.1 Sample
18、 Preparation A minimum of five samples shall be prepared for each condition tested. The surface condition tested should be representative of production conditions and must be fully described in the test report. The cure conditions should match production conditions as closely as possible and shall b
19、e described fully in the test report. NUMBER: MPAPS K-6915 TITLE: Heat Curing Sealant, Body Cabs REVISION: 1512 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 liab
20、ility. 2015 by Navistar, Inc. December 2015 Page 3 of 11 4.3.1.1 Temperature: Times and temperatures used should represent actual bond line conditions rather than the indicated temperatures of the heating elements or the oven air temperature. The oven bake schedules per facility are outlined on tabl
21、e 1 at the end of this specification. 4.3.2 Cure Temperature Cycle Materials shall be tested at both minimum cure and in an over-cure condition by heating in a hot air circulating oven for 60 minutes at the maximum of the cure temperature range and for 20 minutes at the minimum of the cure temperatu
22、re range. Material Type Cure Temperature: Types I, II, IV 138-165C (280-330F) Types IL, IIL, IVL 120-135C (248-275F) Type IIA 130-140C (266-284F) Types III, IIIA, IIIB, IIIC, VI 160-190C (320-374F) 4.3.3 Aluminum Surface Preparation Three sets of five samples of aluminum test samples shall be made f
23、or each condition tested. Prepare samples from aluminum sheet 5052-H32* per MPAPS C-10. Using a solvent (acetone), clean substrate samples thoroughly. The first set shall be tested clean. The second set shall have a light oil coating, as in steps 4.3.3.6 and 4.3.3.7 listed below. The third set shall
24、 be prepared in the following manner: 4.3.3.1 Prepare samples from Aluminum sheet 5052-H32* per MPAPS C-10. 4.3.3.2 Clean samples thoroughly with acetone. 4.3.3.3 Apply Mill Oil (Ashland Tectyl 900)* liberally to the bonding surface. 4.3.3.4 Wipe oil off surface with a clean, soft, paper lab towel.
25、A light oil residue should remain. 4.3.3.5 Bake samples for four (4) hours at 200C (392F). 4.3.3.6 Apply Drawing lubricant (Quaker 61AUS)* liberally to the bonding surface. 4.3.3.7 Wipe oil off surface with a clean, soft, paper lab towel. A light oil residue should remain. 4.3.3.8 Prepare test sampl
26、es as required. * Other grades of aluminum may be used in production. Testing other aluminum grades is not required for qualification but may be necessary in some special cases. Contact Materials Engineering for further information. * Other lubricants will be used in production. Sealants and lubrica
27、nts shall be compatible with each other. Testing compatibility shall be the responsibility of the supplier of the new material. The Plant Metallurgist and/or Quality Control Engineer at the Navistar Body Plant in Springfield, Ohio, maintain a list of approved lubricants. 4.3.4 Steel Surface Preparat
28、ion Two sets of five samples of electro galvanized steel (Steel, Grade 1GALV, EG60G60GE, per MPAPS A-6, Part II) test samples shall be made for each condition tested. Prepare samples from electro galvanized steel*. Using a solvent (acetone), clean substrate samples thoroughly. The first set shall be
29、 tested clean. The second set shall have a light oil coating, as in steps 4.3.3.6 and 4.3.3.7 listed under Section 4.3.3, Aluminum Surface Preparation. *Other grades of steel may be used in production. Testing other steel types is not usually required but may be necessary in some cases. NUMBER: MPAP
30、S K-6915 TITLE: Heat Curing Sealant, Body Cabs REVISION: 1512 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. 2015 by Navistar, Inc. December 2015 Page 4
31、 of 11 4.3.5 E-coat Surface Preparation Materials to be used over E-coat must be tested with current E-coat substrate using a nine-condition test matrix. This matrix tests the adhesion of the sealant to E-coated panels which have been exposed to nominal oven conditions of 30 minutes at 175C (350F),
32、over-bake conditions of 60 minutes at 200C (390 F), and under-bake conditions of 15 minutes at 160C (325F). This matrix also includes test conditions in which the E-coat film thickness is varied at 0.6 mil, 0.9 mil, and 1.2 mil. Ten (10) 4“x12“ panels shall be prepared at each condition. See table 2
33、 for bake schedules per condition. 4.3.6 Shear Strength 4.3.6.1 Method: SAE J1523 with shear lap measured using two metal coupons as specified 25 x 100 mm (1 x 4 in), lapped 25 mm (1 in) with the specified bond line thickness, cured and pulled at a rate of 50 mm (2 in) per minute. Aluminum and steel
34、 samples shall be prepared as noted above. 4.3.6.1.1 Type I, IL, II, IIA, IIL, IV, IVL: 0.76 mm (0.03 in) thick bond line with E-coat primed steel 4.3.6.1.2 Type III, IIIA: 0.25 mm (0.01 in) thick bond line with aluminum 4.3.6.1.3 Type IIIB: 0.25 mm (0.01 in) thick bond line with electro galvanized
35、steel 4.3.6.2 Required: See table 4. 4.3.7 Corrosion 4.3.7.1 Method: ASTM B117 salt spray test-100 hours, on coupons prepared for shear strength test. 4.3.7.2 Required: See table 4. 4.3.8 Humidity 4.3.8.1 Method: Expose specimens prepared for shear strength to 500 hours of humidity conditions per MP
36、APS GT-Paint, method 7E. Test residual strength. 4.3.8.2 Required: See table 4. 4.3.9 Staining (Types I, IL II, IIA, IIL, IV and IVL only) Materials shall be tested under both methods 4.3.9.1 Method A: Apply sample to E-coat primed panels 100 x 200 mm (4 x 8 in) and cure (unless a wet-on-wet system
37、approval is requested). Paint per MPAPS G-5, Grade -18 (white) and cure paint for 30 minutes at 121C (250F). Subject panel to 2500kJ/m2 in Xenon Weatherometer exterior cycle per MPAPS GT-31 Method B. 4.3.9.2 Method B: Apply sample to E-coat primed panels 100 x 200 mm (4 x 8 in) and cure (unless a we
38、t-on-wet system approval is requested). Paint per MPAPS G-5, Grade -18 (white) and cure paint for 30 minutes at 121C (250F). Subject panel to 500 hours in QUV-B Test per MPAPS GT-31 Method D. 4.3.9.3 Required: See table 4. 4.3.10 Low Temperature Adhesion 4.3.10.1 Method: SAE J243 procedure ADS-2, Me
39、thod B, at -29C (-20F), 1.0 inch (25 mm) diameter mandrel, .060 inch (1.5 mm) sealer thickness x 1.0 inch (25 mm) wide band applied to 4“ x 12“ (100X300mm) panel of metal used for shear strength. 4.3.10.2 Required: See table 4. 4.3.11 Shrinkage (Not applicable to Types IIIA, IIIB and VI) 4.3.11.1 Me
40、thod: Fill small, flat container 50 mm diameter x 6 mm height (2 in diameter x 1/4 in height) with sealant material and subject leveled product to maximum curing temperatures for 40 minutes. Observe at room temperature. 4.3.11.2 Required: See table 4. NUMBER: MPAPS K-6915 TITLE: Heat Curing Sealant,
41、 Body Cabs REVISION: 1512 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. 2015 by Navistar, Inc. December 2015 Page 5 of 11 4.3.12 Heat Aging 4.3.12.1 Me
42、thod A: Heat age sample from shrinkage test in recirculating air oven for three hours at max curing temperature. Check hardness. 4.3.12.2 Method B (Types I, II, & III only, in addition to Method A): Apply a 0.8 mm (0.03 in) thick x 50 mm (2 in) width coating to an E-coat primed 100 x 300 mm (4 x 12
43、in) steel panel. Age as indicated in Method A and cool to room temperature. Bend sample 180 around a 25 mm (1 in) diameter mandrel. 4.3.12.3 Required: See table 4. 4.3.13 Sag Resistance (Not applicable to Types II, IIA and IIL) 4.3.13.1 Method: Apply sealant to E-coat primed panels in a 6 mm (1/4 in
44、) bead. Incline panel at 90 angle with bead horizontal. Hold for 15 minutes at 25C (77F) room temperature. Cure at the same angle for 40 minutes at the specified temperature according to Schedule 3 (maximum sealer bake) listed in Table 2. 4.3.13.2 Required: See table 4. 4.3.14 Leveling (Types II, II
45、A and IIL only) 4.3.14.1 Method: Apply 7.9 mm (5/16 in) bead of sealant down the middle of an E-coated, 25 mm (1 in) wide drip rail section at 25 1C (77 2F). 4.3.14.2 Required: See table 4. 4.3.15 Weldability (Types III, IIIB and VI only) 4.3.15.1 Method: SAE J243 Weld-Through Test ADS-3, Method B.
46、4.3.15.2 Required: See table 4. 4.3.16 Expansion (Types IIIA, IIIB and VI only) 4.3.16.1 Method: Cure as specified. Determine volume change per ASTM D471. 4.3.16.2 Required: See table 4. 4.3.17 Paint Adhesion (Types I, IL II, IIA, IIL, IV and IVL only) Materials shall be tested under both methods 4.
47、3.17.1 Method A: Apply sample to E-coat primed panels 100 x 200 mm (4 x 8 in) and cure (unless a wet-on-wet system approval is requested). Paint per MPAPS G-5, Grade -18 (white) and cure paint for 30 minutes at 121C (250F). Test per MPAPS GT-Paint, method 5A. 4.3.17.2 Method B: Apply sample to E-coa
48、t primed panels 100 x 200 mm (4 x 8 in) and cure (unless a wet-on-wet system approval is requested). Paint per MPAPS G-5, Grade -18 (white) and cure paint for 30 minutes at 121C (250F). Test per MPAPS GT-Paint, method5C. 4.3.17.3 Method C: Apply sample to E-coat primed panels 100 x 200 mm (4 x 8 in)
49、 and cure (unless a wet-on-wet system approval is requested). Paint per MPAPS G-5, Grade -18 (white) and cure paint for 30 minutes at 121C (250F). Test per MPAPS GT-Paint, method 7E. 4.3.17.4 Required: See table 4. 5.0 QUALITY Material supplied to this specification shall contain no abrasive agents nor excessive air or gases. 6.0 QUALIFICATION Engineering
