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. 2016 by Navistar, Inc. JUNE 2016 Page 1 of 10 NAVISTAR, INC. Material, Parts, and Process Specifications
2、 (MPAPS) NUMBER: MPAPS K-6925 Former Designation: TMS-6925 TITLE: Moisture Cured and Air Cured, Pumpable Materials CURRENT REV No.: 1606 DATE: June 2016 WRITTEN/EDITED BY: S. Brailey APPROVED BY: R. Goluch SUPERSEDES: Rev. 0912 December 2009 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRE
3、NT 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 of
4、 regulatory limits prior to use. 1.0 APPLICATION This specification outlines the requirements for moisture cured and air cured, pumpable sealants and adhesives. 2.0 SCOPE This specification covers the general requirements, property and performance requirements, quality, source approval and quality c
5、ontrol requirements for the various moisture cured and air cured sealants and adhesives, and all approved source lists. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 spe
6、cification. 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. Quality System Standard ISO 9001 or TS-16949 NAVISTAR MPAPS GT-Paint ASTM D624 CFR
7、Title 29, Part 1910 NAVISTAR MPAPS P-9543 ASTM D792 NAVISTAR Manufacturing Std. MS-D-13 ASTM B117 ASTM G154 NAVISTAR Engineering Design Std A-16 ASTM C794 SAE J243 NAVISTAR MPAPS B-50 ASTM C1135 SAE J1523 NAVISTAR MPAPS C-10 ASTM C1241 SAE J1545 NAVISTAR MPAPS G-5 ASTM C1246 SAE J1960 4.0 REQUIREMEN
8、TS 4.1 Uncured Sealant Properties 4.1.1 Solids 4.1.1.1 Method: SAE J243 Procedure ADS-7, Method A 4.1.1.2 Required: 95% minimum solids. 4.1.2 Density 4.1.2.1 Method: ASTM D792 4.1.2.2 Required: 1.30-1.70kg/L (0.757-0.990lbm/gal) NUMBER: MPAPS K-6925 TITLE: Moisture Cured and Air Cured, Pumpable Mate
9、rials REVISION: 1606 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. 2016 by Navistar, Inc. JUNE 2016 Page 2 of 10 4.1.3 Viscosity 4.1.3.1 Method A: (Typ
10、es I, II and V) SAE J243, Test method ADS-1, Procedure 3.2.1, Conditioning Method C, 275 kPa (40 psi), 25 1C (77 2F), 20 g. Orifice size should be chosen so that the test time is equal or longer than 10 seconds. 4.1.3.2 Required: Report value and orifice size 4.1.3.3 Method B: (Types III and IV) SAE
11、 J243, Test Method ADS-1, Procedure 3.2.2, Conditioning method C 4.1.3.4 Required: 40-80Ps 4.1.4 Aged Viscosity 4.1.4.1 Method: Age sample at 43 1C (110 2F) for 72 hours. Test viscosity per corresponding method as specified in section 4.1.3. 4.1.4.2 Required: Report value 4.1.5 Cleaning The uncured
12、sealant shall clean readily from metal surface, without streaking, when wiped with a cloth dampened with acetone or isopropanol. 4.1.6 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
13、standards. 4.2 Property and Performance Requirements For purposes of screening, quick-knife tests may be performed at RT and after water immersion along with the low temperature adhesion test. 4.2.1 Test Sample Preparation A minimum of five test samples shall be prepared for each condition tested. T
14、he surface condition tested should be representative of production conditions and must be fully described in the test report. A material shall be qualified only on the surface condition in which it will be used during production. The cure conditions should match production conditions as closely as p
15、ossible and shall be described fully in the test report. If production conditions do not impair or accelerate the cure, then cure samples for 7 days at room temperature and 95%RH for moisture cured materials or 60%RH for air cured materials. 4.2.2 Aluminum Sheet Stock Surface Preparation Prepare thr
16、ee sets of five test 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. The third set shall be prepared in the following manner: 4.2.2.1 Clean samples
17、 thoroughly with acetone. 4.2.2.2 Apply Mill Oil (Ashland Tectyl 900)* liberally to the bonding surface 4.2.2.3 Wipe oil off surface with a clean, soft, paper lab towel. A light oil residue should remain. 4.2.2.4 Bake samples for four (4) hours at 200C (392F). 4.2.2.5 Apply drawing lubricant (Quaker
18、 61AUS)* liberally to the bonding surface 4.2.2.6 Wipe oil off surface with a clean, soft, paper lab towel. A light oil residue should remain. 4.2.2.7 Prepare test samples as required NUMBER: MPAPS K-6925 TITLE: Moisture Cured and Air Cured, Pumpable Materials REVISION: 1606 This document is restric
19、ted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. JUNE 2016 Page 3 of 10 * Other grades of aluminum may be used in production. Testing other aluminum grades
20、 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 lubricants shall be compatible with each other. Testing compatibility shall be the responsibility of the s
21、upplier of the new material. 4.2.3 Aluminum Extrusion Surface Preparation Prepare two sets of five test samples from aluminum sheet stock of the same grade as the production part. Using a solvent (acetone), clean substrate samples thoroughly. The first set shall be tested clean. The second set shall
22、 be prepared using extruding and cutting lubricants representative of production. 4.2.4 Top Coated Surface Preparation Prepare a set of five test samples for each condition tested. The test samples shall be made from painted metal panels representative of production. Using a lint free cloth, wipe th
23、e panels to remove any dust. Solvents shall not be used to clean the painted panels, as they may disturb the coating. 4.2.5 Electrocoated Surface Preparation 4.2.5.1 Metal: Three sets of five test samples shall be made from electrocoated steel representative of production. The steel shall be prepare
24、d as described in section 4.2.2 4.2.5.2 Pre-primed metal: Three sets of five test samples shall be made from pre-primed electrocoated steel representative of production. Using a solvent (acetone or isopropanol) and a lint free cloth, clean substrate samples thoroughly. 4.2.5.3 E-coated metal: Materi
25、als 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), over bake conditions of 60 minutes at 200C (39
26、0 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. Using a lint free cloth, wipe the panels to remove any du
27、st. Solvent shall not be used to clean the E-coated panels, as it will disturb the coating. 4.2.6 Shear Strength 4.2.6.1 Method: SAE J1523 with a 25 mm (1 in) overlap at a rate of 50.8mm/min (2.0in/min). Bond thickness shall be 30 mil. Test the samples under the conditions described in Table 1A. 4.2
28、.6.2 Required: A minimum of 100 psi for sealants and 200 psi for adhesives. Report failure mode. 4.2.7 Peel Strength 4.2.7.1 Method: ASTM C794 Test the samples under the conditions described on Table 1B. Cure conditions shall be as described in section 4.2.1 Test Sample Preparation. The second coat
29、is to be applied on the 4th day of cure. 4.2.7.2 Required: A minimum of 15 lb/in for sealants and 30 lb/in for adhesives. Report failure mode. 4.2.8 Humidity 4.2.8.1 Method: GT-Paint method 7E for 500 hours on test samples prepared for shear strength and peel strength tests. 4.2.8.2 Required: A mini
30、mum of 80% of the strength obtained from the test performed at room temperature. NUMBER: MPAPS K-6925 TITLE: Moisture Cured and Air Cured, Pumpable Materials REVISION: 1606 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technica
31、l Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. JUNE 2016 Page 4 of 10 4.2.9 Water Immersion 4.2.9.1 Method: Immerse coupons prepared for shear strength and peel strength tests in distilled water at 25C (77F) 2C (3.6F) for 500 hours. 4.2.9.2 Required: A min
32、imum of 80% of the strength obtained from the test performed at room temperature. 4.2.10 Corrosion 4.2.10.1 Method: ASTM B117 for 500 hours on test samples prepared for shear strength and peel strength tests. 4.2.10.2 Required: A minimum of 90% of the strength obtained from the test performed at roo
33、m temperature. 4.2.11 Heat Aging 4.2.11.1 Method: ASTM C1246 using panels representative of production. Include hardness readings of the cured material before and after the heat cycle. After aging, bend the sample 180 around a 25 mm (1in) diameter mandrel. 4.2.11.2 Required: The samples shall exhibi
34、t no weight loss, and no visible signs of cracking, chalking or loss of adhesion after the heat cycle. The samples shall exhibit no visible signs of cracking or loss of adhesion to the panel after bending. Report hardness readings. 4.2.12 Low Temperature Adhesion 4.2.12.1 Method: SAE J243 procedure
35、ADS-2, Method B, at -29C (-20F), 1.0 inch (25 mm) diameter mandrel, 0.060 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. 4.2.12.2 Required: Shall exhibit no visible cracking or loss of adhesion to the base panel. 4.
36、2.13 Shrinkage 4.2.13.1 Method: ASTM C1241 using the density calculated in section 4.1.2 4.2.13.2 Required: 5% maximum shrinkage 4.2.14 Tear Strength 4.2.14.1 Method: ASTM D624 type C, cut the samples from strips of cured material 2.3mm 1.0mm thick. 4.2.14.2 Required: Report value. 4.2.15 Tensile St
37、rength 4.2.15.1 Method: ASTM C1135 4.2.15.2 Required: Report value. 4.2.16 Staining (Types I and V only) 4.2.16.1 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 -19 (white) and cure paint
38、for 30 minutes at 121C (250F). Per SAE J1960 exterior cycle, subject panel to 2500kJ/m2 in Xenon Weatherometer. 4.2.16.2 Required: Sealant/adhesive shall cause no discoloration to painted surfaces and compare favorably with the adjoining painted metal surface where no sealant/adhesive has been appli
39、ed. 4.2.16.3 Method B: 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 -19 (white) and cure paint for NUMBER: MPAPS K-6925 TITLE: Moisture Cured and Air Cured, Pumpable Materials REVISION: 1606 This
40、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. 2016 by Navistar, Inc. JUNE 2016 Page 5 of 10 30 minutes at 121C (250F). Per ASTM G154, subject panel to 500 h
41、ours in QUV Test with the following test cycle. 4.2.16.3.1 8 hours Ultraviolet light 60o C (140oF) 4.2.16.3.2 4 hours condensing humidity 50o C (122oF) 4.2.16.3.3 Repeat until exposure period is completed. 4.2.16.4 Required: Sealant/adhesive shall cause no discoloration to painted surfaces and compa
42、re favorably with the adjoining painted metal surface where no sealant/adhesive has been applied. 4.2.17 Sag Resistance (Not applicable to Types III and IV) 4.2.17.1 Method: Apply sample along centerline of E-coat primed panels in a 3 x 25 x 200 mm (1/8 x 1 x 8 in) bead. Scribe panels to mark initia
43、l material location. Incline panel at a 90 angle with bead horizontal and hold for 48 minutes at 25C (77F) room temperature. Measure any movement from scribe. 4.2.17.2 Required: Sealant/adhesive will flow a maximum of 3mm (1/8in) 4.2.18 Accelerated Weathering (Color matched materials only) 4.2.18.1
44、Method: Apply sample to electrocoated panels 100 x 200 mm (4 x 8 in) that have been painted of the same color as the sealant. Allow the material to cure per manufacturers specifications. Expose the samples to accelerated weathering cycles as described in Methods A and B of section 4.2.16 Staining us
45、ing a top-coated panel of the same color as the control. Perform an Instrumental Color Difference analysis, per SAE J1545 before and after accelerated weathering. 4.2.18.2 Required: Color difference measurement between the color matched material and the control panel should be E940.5 for good visual
46、 color match, and E941.0 for black. 4.2.19 Leveling (Types III and IV only) 4.2.19.1 Method: Apply 7.9 mm (5/16 in) bead of sealant down the middle of an E-coat primed 25 mm (1 in) wide drip rail section at 25 1C (77 2F). 4.2.19.2 Required: Sealant shall flow from wall-to-wall with a uniform thickne
47、ss, within 120 seconds. 4.2.20 Weldability (Type V only) 4.2.20.1 Method: SAE J243 Weld-Through Test ADS-3, Method B. 4.2.20.2 Required: Shall meet tensile, flashing, electrode life, and electrode pickup, as specified. 5.0 QUALITY Material supplied to this specification shall contain no abrasive age
48、nts, nor excessive air or gases. 6.0 QUALIFICATION Material and processes submitted for approval to this specification shall include the following: 6.0.1 A detailed, signed test report documenting testing to this specification prepared per MPAPS P-9543. 6.0.2 Test coupons or photographs showing fail
49、ure modes for each test 6.0.3 The complete procedure used for preparing and curing materials for test, especially surface preparation and condition of the test coupons. NUMBER: MPAPS K-6925 TITLE: Moisture Cured and Air Cured, Pumpable Materials REVISION: 1606 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
