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. DECEMBER 2014 Page 1 of 9 NAVISTAR, INC. Material, Parts, and Process Specificatio
2、ns (MPAPS) NUMBER: MPAPS L-6610 Former Designation: TMS-6610 TITLE: Thermal Insulation CURRENT REV No.: 1412 DATE: DEC. 2014 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: Rev. 1406 June 2014 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISI
3、ON 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 regulato
4、ry limits prior to use. Change Notice: Added a material type to Section 4.2. 1.0 SCOPE This specification covers the general requirements, property and performance requirements, quality, qualification, source approval, and quality control for cab insulators and composite heat shields. NOTE: For exis
5、ting engineering drawings/blueprints which reference this specification but do not specify a Type (I, II, III, IV, V, VI, VII, VIII, IX, X, or XI), Type I will be supplied. 1.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification mu
6、st comply with the requirements of the MPAPS B-50 specification. 2.0 APPLICATION This specification outlines the requirements for interior cab insulation, which is used as a thermal barrier to improve the heating and cooling characteristics of the cab. Several types of thermal insulation/heat shield
7、s are included in this specification. If a specific insulation material is required, it shall be described on the print. Note: This specification is for thermal insulators and heat shields. Although some of these materials may have acoustic benefits (see note on acoustic insulation below), materials
8、 with specific acoustic requirements may be found in these specifications: Cab floor and dash insulation is covered in TMS-6606, urethane foam insulation in TMS-6505, molded fiberglass engine tunnel cover and external cab insulators in TMS-6609, and other acoustic insulation in TMS-6612. 2.1 Type I:
9、 Insulation that consists of polyester spun fibers. The cab insulator shall have a nominal thickness of 2.5 cm (1 in) except for designated areas on the drawing where the thickness is increased to afford better insulation properties. (Thickness of some part families may vary depending upon die plate
10、 requirements.) 2.2 Type II: Insulation that consists of an open cell, urethane foam. The foam shall be uniform in thickness, will be free from thin spots or voids and shall show no sign of surface shedding or crumbling. 2.3 Type III: Polyethylene closed-cell foam with a pressure-sensitive adhesive
11、that can be easily repositioned during assembly. The foam shall be uniform in thickness, will be free from thin spots or voids and shall show no sign of surface shedding or crumbling. This type of insulation is typically NUMBER: MPAPS L-6610 TITLE: Thermal Insulation REVISION: 1412 This document is
12、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. DECEMBER 2014 Page 2 of 9 used in the dash, door and floor areas where additional thermal insulatio
13、n is desired but no acoustic benefit is needed. The closed nature of this product is particularly beneficial in areas that may be wet or exposed to the environment. 2.4 Type IV: Foam, glass fiber or polyester fiber covered on one or both sides with a 1-mil metalized polyester facing film or encapsul
14、ated within a fibrous scrim covering. Foam, if applicable, shall be uniform in thickness, will be free from thin spots or voids and shall show no sign of surface shedding or crumbling. These products are typically used for under-hood thermal insulation and may be fastened with pressure sensitive adh
15、esive (PSA) film with release liner, liquid adhesive or by mechanical fasteners. This product may need to have edges sealed or wrapped, depending on the application, and shall be so designated on the engineering print. 2.5 Type V: Composite insulation having aluminum foil on one or both sides with m
16、ultiple layers of polyester or glass fibers sandwiched between additional layers of foil. Material will be manufactured such that sharp edges are not exposed. Thickness will be uniform and show no evidence of delamination. These products are typically used for under-hood thermal insulation where tem
17、peratures may reach up to 400 F. They may be fastened with PSA film with release liner, liquid adhesive or by mechanical fasteners. This product may need to have edges sealed or wrapped, depending on the application, and shall be so designated on the engineering print. Specific composite constructio
18、ns shall be indicated on the engineering print or as a letter designation in this specification. 2.6 Type VI: Embossed aluminum or stainless steel heat shields made with multiple layers that can be flat stamped or formed. Material will be manufactured such that sharp edges are not exposed. Thickness
19、 will be uniform although variance due to forming will be accepted. Ceramic, glass or polyester fiber insulation may be, optionally, used to insulate and separate the various layers. These materials are typically used to shield areas from localized hot spots that can reach temperatures up to 550C, b
20、y reflecting and laterally conducting the heat outward over a relatively large surface area (note: aluminum is a better heat shield material but would have a lower temperature limit and more subject to physical damage; stainless steel should be used when appropriate). They are typically attached by
21、mechanical means or by spot welds. This product may need to have edges sealed or wrapped, depending on the application and handling concerns. Specific composite constructions shall be indicated on the engineering print or as a letter designation in this specification. 2.7 Type VII A tri-layer compos
22、ite consisting of ” polyurethane foam faced on each side with Aluminized Polyester Facing, a ” air gap achieved with Foam Tape spaced throughout the part, and a ” polyurethane foam faced on each side with Aluminized Polyester Facing. 2.8 Type VIII Glass fiber insulation encapsulated within a fibrous
23、 scrim covering (this covering may be applied in bus assembly). These products are to be used only in bus applications only and may be temporarily fastened with liquid adhesive or by mechanical techniques for assembly purposes and shall be completely encased in the final assembly. 2.9 Type IX A sili
24、cone sponge usually faced by aluminum foil or scrim attached with a silicone PSA. This is commonly available in thicknesses of 3 and 5 mm and can withstand temperatures up to 200C. 2.10 Type X A glass fabric cloth faced with aluminum foil which may be fastened or bonded with a PSA. 2.11.1 Type XI A
25、non-woven pad comprised of a combination of polypropylene micro-fibers and polyester staple fibers. The facing may be either a polypropylene scrim, a polyester scrim, or an embossed combination material. There are four performance levels of Type XI that have different thicknesses. They are summarize
26、d in Section 4.2. NUMBER: MPAPS L-6610 TITLE: Thermal Insulation REVISION: 1412 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. DE
27、CEMBER 2014 Page 3 of 9 2.12 Sound Absorption Properties: Several of the materials listed above may provide a desired noise control function. Applications with specific acoustic requirements can be found in these specifications: Cab floor and dash insulation is covered in TMS-6606, urethane foam ins
28、ulation in TMS-6505, molded fiberglass engine tunnel cover and external cab insulators in TMS-6609, and other acoustic insulation in TMS-6612. Specifically Types I, II and VII are expected to provide this benefit in the intended applications. Care should be given in applying and sourcing this produc
29、t such that the end result does not defeat this purpose. Additionally, Types IV and V can be designed and used to have additional acoustic benefit although TMS-6609 is usually used in this manner. Types II, VIII and IX are not considered to provide any benefit. Type VI does not provide any benefit e
30、ither, although it may be preferred over solid sheet metal shields which can cause acoustic/vibration issues. Please consult Materials Engineering and NVH Engineering for assistance in this regard. Sound absorption requirements for other applications may be specified by the following material grades
31、: 2.12.1 Method: Test in accordance with ASTM E 1050. Test sample/assembly shall include scrim if applicable and be of equivalent composition as intended for production. The scrim is to face the sound source with no air gap between the sample/assembly and back plate. 2.12.2 Sample Size: Material sha
32、ll be acquired from a minimum of three manufacturing lots for final validation, with at least three sample sets from each lot. Material thickness for this test shall be nominally 25 mm, regardless of the actual design thickness for the application. 2.12.3 Required: Shall meet the following minimum r
33、equirements for absorption coefficients. Shall also report density, thickness, and composition of test sample/assembly. Normal-incidence absorption will be measured at 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, and 4000 Hz. 2.12.4 Grade A: The normal-incidence absorption coefficient at any o
34、ne frequency shall not be less than 0.10 and the average of the absorption coefficients shall not be less than 0.35. Grade B: The normal-incidence absorption coefficient at any one frequency shall not be less than 0.15 and the average of the absorption coefficients shall not be less than 0.60. 2.13
35、Fastening Considerations: Generally, fibrous and open cell foam products bond very poorly with pre-applied PSA type adhesive systems. Liquid systems can be successful if implemented properly and accepted by the manufacturing facility. Fasteners can work well if applied properly although they can pro
36、vide heat and sound paths that defeat the insulation if done incorrectly. Some combination of methods is often preferred but in any case the final system shall be thoroughly validated in the product and manufacturing. NUMBER: MPAPS L-6610 TITLE: Thermal Insulation REVISION: 1412 This document is res
37、tricted 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. DECEMBER 2014 Page 4 of 9 3.0 REFERENCE DOCUMENTS Unless otherwise specified the latest issue of all r
38、eferenced standards shall apply. The following Specifications, Standards, and Regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 ASTM D 903 NAVISTAR Manufacturing Std. MS-D-13 ASTM B 117 ASTM D 3330 NAVISTAR Eng. Design Std. A-16 AS
39、TM C 177 ASTM D 3574 NAVISTAR TMS-9544 ASTM C 518 FMVSS-302 NAVISTAR MPAPS K-6929 ASTM D 751 MPAPS B-50 NAVISTAR TMS-6505 TMS-6609 MPAPS C-10 AATCC Method 30 ASTM D 1056 MPAPS A-37 TMS-6612 MPAPS P-9543 TMS-6606 4.0 GENERAL REQUIREMENTS 4.1 Material Properties Materials supplied to this specificatio
40、n shall be appropriate for their intended use. Material requirements listed are intended as a guideline to meet the intended finished component requirements. 4.1.1 Polymeric Fiber (Types I, IV, V, VI and XI if applicable) The polymeric fiber will consist of an engineered blend of spun polyester ther
41、moplastic fibers. Fibers will be surface treated in such a manner that interference with fasteners (attaching and twisting with the fastener) will be minimized. Some materials using polymeric fibers, such as Versamat 2000, require a heat treatment (searing) using a heated roller on both surfaces to
42、satisfy this requirement. Other materials such as Thinsulate Acoustic Insulation may have a polypropylene or polyester scrim or embossed surface to provide enhanced strength and abrasion resistance. 4.1.2 Glass Fiber (Types IV, V, VI and VIII if applicable) The basic glass fiber shall be of rotary t
43、ype with an average diameter of (.00030 .00002 mils). The glass fibers shall be bonded with 5% 1% (by weight) phenolic binder (thermosetting resin). Fibers will be surface treated in such a manner that interference with fasteners (attaching and twisting with the fastener) will be minimized. 4.1.3 Ur
44、ethane Foam (Types II and IV) Urethane foam per TMS-6505 Type I, Density = 16 1.6 kg/m (1 0.1 lbm/ft) 4.1.4 Polyethylene Foam (Type III) To Be Determined (TBD) 4.1.5 Metalized Polyester Film (Type IV) - (TBD) 4.1.6 Aluminum Foil Aluminum foil per MPAPS C-10, minimum thickness of 0.006 inches 4.1.7 S
45、tainless Steel Foil or Sheet (Type VI) Stainless steel foil or sheet per MPAPS A-37, minimum thickness of 0.0005 inches 4.1.8 Silicone Sponge (Type IX) 2D1A4 per ASTM D 1056 4.1.9 Fiberglass Cloth (Type X) The fiber glass cloth must have average thickness of at least 0.25 mm and an average cloth wei
46、ght of 0.3 kg/m2 0.05 kg/m2. A plain weave pattern should be used. NUMBER: MPAPS L-6610 TITLE: Thermal Insulation REVISION: 1412 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assum
47、e all patent liability. 2014 by Navistar, Inc. DECEMBER 2014 Page 5 of 9 4.1.10 Pressure Sensitive Adhesive (PSA) Film Acrylic See 2.13 for Fastening Considerations. This product is typically limited to applications up to 125 C (please consult Materials Engineering for applications or claims exceedi
48、ng this limit). 4.1.11 Pressure Sensitive Adhesive (PSA) Film Silicone See 2.13 for Fastening Considerations. This product is typically limited to applications up to 200 C (please consult Materials Engineering for applications or claims exceeding this limit). 4.2 Insulation Density and Thermal Conductivity Requirements (k value) Type Density per ASTM D 1117 kg/m3 (lbs/ft3) 15% Thermal Conductivity (k) BTUin/hrftF 75F max Type I 12.0 48.0 (0.75 3.0) .308 Type II 20.8 48.0 (1.25 3.0) .350 Type III *28.8 min. (1.8 min.) .350 Type IV *
