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. 2017 by Navistar, Inc. OCTOBER 2017 Page 1 of 5 NAVISTAR, INC. Material, Parts, and Process Specification
2、s (MPAPS) NUMBER: MPAPS- L-6512 Former Designation: TMS-6512 TITLE: Foam and Sponge, Static Sealing CURRENT REV No.: 1710 DATE: Oct. 2017 WRITTEN/EDITED BY: J. Jamsion APPROVED BY: R. Goluch SUPERSEDES: Rev. 1606June 2016 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This spe
3、cification 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 limits p
4、rior to use. 1.0 APPLICATION This specification covers two general types of die cut foam or sponge for static sealing applications which can be further specified by material. The first are flexible semi-closed cell foams suitable for sealing systems where restricted air flow is desired. The second i
5、s expanded rubber or sponge where the material must be closed cell or exhibit properties associated with closed cell rubber materials. This specification also covers three grades of non-connected cellular polyvinyl chloride product. 2.0 SCOPE This specification covers the general requirements, prope
6、rty and performance requirements, and source approval and quality control. 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 specification. 3.0 REFERENCE DOCUMENTS Unless ot
7、herwise 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 MPAPS L-6510 PSTC-31 CFR Title 29, Part 1910 ASTM C972 PSTC-2 NAVISTAR Supplier Pac
8、king and Shipping Std. D-13 ASTM D1056 FMVSS 302 NAVISTAR Engineering Design Std A-16 ASTM D1564 NAVISTAR MPAPS B-50 MPAPS P-9543 MPAPS K-6929 ASTM D1667 ASTM D3574 MPAPS G-5 MPAPS P-9544 MPAPS GT-31 4.0 REQUIREMENTS 4.1 Classification and Construction Type designations are used to specify the appli
9、cation in the system and the allowed materials that can be used to meet those requirements. Suffix designations are used to specify the specific materials and hardness required for the application. Pressure sensitive adhesives may be specified on the engineering drawing and meet the requirements her
10、ein. NUMBER: MPAPS L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1710 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. 2017 by Navistar, Inc. OC
11、TOBER 2017 Page 2 of 7 4.1.1 Types 4.1.1.1 Type 1 Semi-permeable foam or sponge. This is typically used where low flange sealing pressures are present and a small amount of moisture absorption is not an issue. Typical applications include HVAC components, transmission covers, and electrical covers.
12、Typical materials include vinyl, low permeability urethane, micro cellular urethane and silicone. 4.1.1.2 Type 2 Closed cell expanded rubber. This is typically used for exterior sealing applications with higher flange pressures though some softer materials are available. Typical materials include EP
13、DM, blends of SBR and CR and silicone. 4.1.1.3 Type 3 Non-connected cellular polyvinyl chloride product with a pressure-sensitive adhesive on one side, protected with a release paper. This is intended for use as a compression seal that inhibits the passage of air, water, and dust in assembled joints
14、 or components. This type is divided into three classes. 4.1.2 Materials Grades A through C and Grade H are usually associated with Type 1 applications; Grades D through F are usually Type 2; and Grades G and Z with either please contact Materials Engineering and supplier if other combinations are d
15、esired. If only a type is specified, then any appropriate material is acceptable that will work in the application. Selection of material and determination of its suitability should be done in consultation with Materials Engineering. 4.1.2.1 Grade A Vinyl 4.1.2.2 Grade B Low permeable urethane foam
16、4.1.2.3 Grade C Micro cellular urethane foam 4.1.2.4 Grade D EPDM elastomer 4.1.2.5 Grade E SBR blends 4.1.2.6 Grade F CR blends 4.1.2.7 Grade G Silicone elastomers 4.1.2.8 Grade H Polyethylene closed cell foam 4.1.2.9 Grade Z Materials not currently listed above, so designate polymer type in engine
17、ering note. 4.1.3 Classes (Type 3 only) 4.1.3.1 Class I (Firm) this material is formulated to seal under high compressive forces experienced in mechanically fastened assemblies, such as riveted joints in cab construction. 4.1.3.2 Class II (Medium) this material is formulated to seal where medium com
18、pressive forces are experienced and where irregularities on mating surfaces are encountered. This product is recommended for application where dimensional stability is necessary on thin wall die-cut parts. 4.1.3.3 Class III (Soft) this material is formulated to seal where light compressive forces ar
19、e experienced and greater irregularities and tolerances are encountered. NUMBER: MPAPS L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1710 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers ar
20、e required to assume all patent liability. 2017 by Navistar, Inc. OCTOBER 2017 Page 3 of 7 4.1.4 Hardness Grades Various hardness grades are available in many of these materials. In general, hardness shall follow ASTM D 1056 conventions for compression force deflection ranges. When specified, the ha
21、rdness grade shall be noted parenthetically at the end of the note. Grade Compression Deflection at 25% Deflection kPa psi 0 Less than 15 Less than 2 1 15 35 2 5 2 35 65 5 9 3 65 90 9 13 4 90 120 13 17 5 120 170 17 - 25 4.2 Material Requirements The following material properties shall be determined
22、by the methods indicated in ASTM D 1056, with the exception of Type 3 materials. 4.2.1 Grade A Vinyl 4.2.2 Grade B Low permeable urethane foam no grade designations; shall meet MPAPS L-6510. 4.2.3 Grade C Micro cellular urethane foam 4.2.4 Grade D EPDM elastomers 4.2.5 Grade E SBR blends 4.2.6 Grade
23、 F CR blends 4.2.7 Grade G Silicone elastomers 4.2.8 Grade H- Polyethylene closed cell foam 4.2.9 Type 3 shall consist of non-connected cellular polyvinyl chloride resin base foam, with a suitable pressure-sensitive adhesive on one surface, protected with an easy release liner paper. When compressed
24、 a min of 30%, this material is designed to produce a satisfactory seal. 4.2.10 Pressure Sensitive Adhesives Generally, adhesives supplied to this specification only need to adhere until assembly is complete (as a seal in compression does not usually need an adhesive). In those cases where better, m
25、ore durable performance is required, the adhesive shall meet MPAPS K-6929. In both cases the adhesive needs to survive the environment the seal is intended for without causing any detrimental effects to the performance of the seal. Please contact Materials Engineering if further guidance is required
26、. 4.2.10.1 For Type 3, the adhesive shall be of a long-aging high tack contact adhesive formulation. 4.2.11 Release Paper (Type 3 only) this product is manufactured so that as the foam material is unrolled, the adhesive surface is expose and the release paper remains on the adhesive free surface. Re
27、lease paper shall remain with the tape and be removed after application. This paper shall release easily and cleanly from the foam. NUMBER: MPAPS L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1710 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without
28、permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. OCTOBER 2017 Page 4 of 7 4.2.12 Color (Type 3 only) shall be black unless otherwise specified. 4.2.13 Barrier Coating Type 3 Class II material is available with a low friction
29、 barrier coating on the non-adhesive side to reduce friction and grab between the foam and mating surface. When material is applied around a fixed surface and a movable surface, such as a door or service cover, this coating should be specified on the part drawing. 4.3 Performance Requirements Type 3
30、 ONLY 4.3.1 Compression: ASTM D 1667 - 50% Compression or ASTM C972 Force to Compress Compression Deflection Class I 69.0-96.6 kPa (10.0-14.0 psi) 34.5-69.0 kPa (5.0-10.0 psi) Class II 41.4-69.0 kPa (6.0-10.0 psi) 34.5-69.0 kPa (5.0-10.0 psi) Class III 20.7-41.4 kPa (3.0-6.0 psi) 10.4-27.6 kPa (1.5-
31、4.0 psi) NOTE: Force to compress is instantaneous value. Compression deflection value after one minute deflection. 4.3.2 Density: (ASTM D 1667) Class I 0.160 g/cm (10 lbm/ft) min Class II 0.128 g/cm (8 lbm/ft) min Class III 0.096 g/cm (6 lbm/ft) min 4.3.3 Tensile: (ASTM D 3574, PSTC-31) Class I 275
32、kPa (40 psi) min Class II 170 kPa (25 psi) min Class III 55 kPa (8 psi) min 4.3.4 Elongation: (ASTM D 3574, PSTC-31) Class I 100% mi Class II 100% min Class III 100% min 4.3.5 Adhesion: (PSTC-2) Class I 109 N/m width (10 ozf/in width) min Class II 109 N/m width (10 ozf/in width) min Class III 109 N/
33、m width (10 ozf/in width) min NOTE: Sample may be reinforced by applying masking tape to non-adhesive side. 4.3.6 Water Absorption 4.3.6.1 Method Compress 30% a weighed sample 101.6 mm (4 in) square between stainless steel plates. Submerge at room temperature under a 50.8 mm (2 in) head of water for
34、 22 hours. Remove sample, carefully blot all NUMBER: MPAPS L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1710 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 pat
35、ent liability. 2017 by Navistar, Inc. OCTOBER 2017 Page 5 of 7 surfaces with an absorbent paper towel, and reweigh. Calculate weight change as water absorbed by volume. 4.3.6.2 Required Class I 4% max Class II 4% max Class III 6% max 4.3.7 Low Temperature Flexibility 4.3.7.1 Method condition a 150 m
36、m (6 in) long specimen four hours at -29.0 1C (-20 2F). Bend sample 180 around a 6.4 mm (1/4 in) mandrel at the test temperature. 4.3.7.2 Required All classes - no cracking. 4.3.8 Compression Set 4.3.8.1 Method ASTM D 1667 at 70 1C (158 2F) for 22 hours. Ply sample to 12.7 mm (1/2 in) min thickness.
37、 Measure set 30 minutes after load has been released. 4.3.8.2 Required All Classes - 90% max set. 4.3.9 Staining 4.3.9.1 Method Apply sealant on a typical steel or aluminum test panel and spray paint per NAVISTAR MPAPS G-5, Grade -19 (white) and cure paint for 20 minutes at 150C (300F). Subject test
38、 specimen to 250 hours per MPAPS GT-31, Method E. 4.3.9.2 Required Shall not discolor the painted surface and compare favorably with the adjoining painted metal surface. 4.3.10 Flammability Resistance Material and parts supplied to this specification shall conform to and be certified by the supplier
39、s to meet the requirements of the latest issue of the Federal Motor Vehicle Safety Standard 571.302 - Flammability of Interior Materials, and all requirements of MPAPS P-9544. 5.0 QUALITY All product supplied shall be clean and free from dirt, oils, sharp edges, or defects harmful to product perform
40、ance. 5.1 Qualification Material and processes submitted for approval to this specification shall include the following: 5.1.1 Report: A detailed and signed test report documenting testing to this specification prepared as per MPAPS P-9543. The report will include actual test data not merely test su
41、mmaries. 5.1.2 Failure Modes: Test samples or photographs showing failure modes for each destructive test as necessary to fully describe those failure modes. Descriptions are adequate if the mode is easily understandable (no jargon) and not unexpected. Unexpected failure modes shall be described or
42、pictured as completely as possible. NUMBER: MPAPS L-6512 TITLE: Foam and Sponge, Static Sealing REVISION: 1710 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 liabi
43、lity. 2017 by Navistar, Inc. OCTOBER 2017 Page 6 of 7 5.1.3 Test Procedure: The procedure used for preparing, curing and assembling materials for test. 5.1.4 Analysis: A detailed analysis of the test results including assumptions made, unexpected results and an explanation of any non-compliant resul
44、ts. 5.2 Submission The material test report shall be submitted to: Manager of Materials Engineering Materials Engineering and Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 6.0 QUALIFICATION Engineering qualification of sources is required in advance of production shipments. Suppliers
45、 shall submit samples for approval of finish, luster, color and appearance to the Navistar Industrial Design Group. Samples shall be accompanied by test data certifying that all requirements of the specification have been met. Upon approval, styling master samples denoting the minimum level of accep
46、table appearance quality shall be developed and retained by the supplier and the quality department of each using NAVISTAR facility. 6.1 Quality Control Plan A Quality Control Plan for products supplied to the requirements of this specification will be established by mutual agreement between NAVISTA
47、R and the supplier. Unless specific exception is noted, the following characteristics, where applicable*, shall be included in the plan as features for management by statistical process control.* * Other characteristics for inclusion in the control plan may be specified on the engineering drawing an
48、d/or purchase order. * See NAVISTAR Engineering Design Standard A-16 7.0 SOURCE APPROVAL AND QUALITY CONTROL 7.1 Supplier Requirements All suppliers to NAVISTAR are required to be registered to ISO 9001 Quality System Requirements. NAVISTAR will also accept TS-16949 registration as long as the suppl
49、ier can also fulfill all AIAG PPAP (Production Part Approval Process) documentation and approval requirements. Suppliers must maintain their certification with an accredited registrar and must furnish copies of registration certificates to their Corporate Buyer upon request. 7.2 Approval Parts supplied against contracts or purchase orders citing this
