NAVISTAR MPAPS L-6610-2017 Thermal Insulation.pdf

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. SEPTEMBER 2017 Page 1 of 9 NAVISTAR, INC. Material, Parts, and Process Specificati

2、ons (MPAPS) NUMBER: MPAPS L-6610 Former Designation: TMS-6610 TITLE: Thermal Insulation CURRENT REV No.: 1709 DATE: Sep. 2017 WRITTEN/EDITED BY: D. Baker APPROVED BY: R. Goluch SUPERSEDES: Rev. 1412 Dec. 2014 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification ma

3、y 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 prior to use.

4、1.0 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 shields are included in this specification. If a specific insulation ma

5、terial 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 with specific acoustic requirements may be found in these specif

6、ications: Cab floor and dash insulation is covered in MPAPS L-6606, urethane foam insulation in MPAPS L-6505, molded fiberglass engine tunnel cover and external cab insulators in MPAPS L-6609, and other acoustic insulation in MPAPS L-6612. 2.0 SCOPE This specification covers the general requirements

7、, property and performance requirements, quality, qualification, source approval, and quality control for cab insulators and composite heat shields. NOTE: For existing engineering drawings/blueprints which reference this specification but do not specify a Type (I, II, III, IV, V, VI, VII, VIII, IX,

8、X, or XI), Type I 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 otherwise specified the latest issue of all referenced stan

9、dards 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 Supplier Packing and Shipping Std. D-13 ASTM B 117 ASTM D 3330 NAVISTAR Eng. Design Std. A-16 AST

10、M C 177 ASTM D 3574 NAVISTAR MPAPS P-9544 ASTM C 518 FMVSS-302 NAVISTAR MPAPS K-6929 ASTM D 751 NAVISTAR MPAPS L-6505 ASTM D 1056 NAVISTAR MPAPS L-6609 AATCC Method 30 NAVISTAR MPAPS L-6606 NAVISTAR MPAPS C-10 NAVISTAR MPAPS L-6612 NAVISTAR MPAPS A-37 NAVISTAR MPAPS P-9543 NAVISTAR MPAPS B-50 NAVIST

11、AR MPAPS B-50 NAVISTAR MPAPS C-10 NUMBER: MPAPS L-6610 TITLE: Thermal Insulation REVISION: 1709 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 N

12、avistar, Inc. SEPTEMBER 2017 Page 2 of 9 4.0 GENERAL REQUIREMENTS 4.1 Product Type Descriptions and Specific Requirements 4.1.1 Type I: 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 wher

13、e the thickness is increased to afford better insulation properties. (Thickness of some part families may vary depending upon die plate requirements.) 4.1.2 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

14、 and shall show no sign of surface shedding or crumbling. 4.1.3 Type III: Polyethylene closed-cell foam with a pressure-sensitive adhesive 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

15、shedding or crumbling. This type of insulation is typically used in the dash, door and floor areas where additional thermal insulation 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. 4.

16、1.4 Type IV: Foam, glass fiber or polyester fiber covered on one or both sides with a 1-mil metalized polyester facing film or encapsulated 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 she

17、dding or crumbling. These products are typically used for under-hood thermal insulation and may be fastened with pressure sensitive adhesive (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,

18、 and shall be so designated on the engineering print. 4.1.5 Type V: Composite insulation having aluminum foil on one or both sides with multiple layers of polyester or glass fibers sandwiched between additional layers of foil. Material will be manufactured such that sharp edges are not exposed. Thic

19、kness will be uniform and show no evidence of delamination. These products are typically used for under-hood thermal insulation where temperatures 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 e

20、dges sealed or wrapped, depending on the application, and shall be so designated on the engineering print. Specific composite constructions shall be indicated on the engineering print or as a letter designation in this specification. 4.1.6 Type VI: Embossed aluminum or stainless steel heat shields m

21、ade with multiple layers that can be flat stamped or formed. Material will be manufactured such that sharp edges are not exposed. Thickness will be uniform although variance due to forming will be accepted. Ceramic, glass or polyester fiber insulation may be, optionally, used to insulate and separat

22、e the various layers. These materials are typically used to shield areas from localized hot spots that can reach temperatures up to 550C, by 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 low

23、er temperature limit and more subject to physical damage; stainless steel should be used when appropriate). They are typically attached by 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

24、constructions shall be indicated on the engineering print or as a letter designation in this specification. 4.1.7 Type VII A tri-layer composite consisting of ” polyurethane foam faced on each side with Aluminized Polyester Facing, a ” air gap achieved with Foam Tape spaced throughout the part, and

25、a ” polyurethane foam faced on each side with Aluminized Polyester Facing. NUMBER: MPAPS L-6610 TITLE: Thermal Insulation REVISION: 1709 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required

26、to assume all patent liability. 2017 by Navistar, Inc. SEPTEMBER 2017 Page 3 of 9 4.1.8 Type VIII Glass fiber insulation encapsulated within a fibrous 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 fas

27、tened with liquid adhesive or by mechanical techniques for assembly purposes and shall be completely encased in the final assembly. 4.1.9 Type IX A silicone 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 wi

28、thstand temperatures up to 200C. 4.1.10 Type X A glass fabric cloth faced with aluminum foil which may be fastened or bonded with a PSA. 4.1.11 Type XI A non-woven pad comprised of a combination of polypropylene micro-fibers and polyester staple fibers. The facing may be either a polypropylene scrim

29、, a polyester scrim, or an embossed combination material. There are four performance levels of Type XI that have different thicknesses. They are summarized in Section 4.2. 4.2 Sound Absorption Properties: Several of the materials listed above may provide a desired noise control function. Application

30、s with specific acoustic requirements can be found in these specifications: Cab floor and dash insulation is covered in MPAPS L-6606, urethane foam insulation in MPAPS L-6505, molded fiberglass engine tunnel cover and external cab insulators in MPAPS L-6609, and other acoustic insulation in MPAPS L-

31、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 product such that the end result does not defeat this purpose. Additionally, Types IV and V can be designed and used to have additional acousti

32、c benefit although MPAPS L-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 either, although it may be preferred over solid sheet metal shields which can cause acoustic/vibration issues. Please consult Material

33、s Engineering and NVH Engineering for assistance in this regard. Sound absorption requirements for other applications may be specified by the following test method and material grades: 4.2.1 Method: Test in accordance with ASTM E 1050. Test sample/assembly shall include scrim if applicable and be of

34、 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. 4.2.2 Sample Size: Material shall be acquired from a minimum of three manufacturing lots for final validation, with at least three sample sets from ea

35、ch lot. Material thickness for this test shall be nominally 25 mm, regardless of the actual design thickness for the application. 4.2.3 Required: Shall meet the following minimum requirements for absorption coefficients. Shall also report density, thickness, and composition of test sample/assembly.

36、Normal-incidence absorption will be measured at 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, and 4000 Hz. 4.2.4 Grade A: The normal-incidence absorption coefficient at any one frequency shall not be less than 0.10 and the average of the absorption coefficients shall not be less than 0.35. Grad

37、e 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. NUMBER: MPAPS L-6610 TITLE: Thermal Insulation REVISION: 1709 This document is restricted and may not be sent outside Navistar

38、, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. SEPTEMBER 2017 Page 4 of 9 4.3 Fastening Considerations: Generally, fibrous and open cell foam products bond very poorly with pre-applied PSA type

39、 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 provide heat and sound paths that defeat the insulation if done incorrectly. Some combination of methods is often pref

40、erred but in any case the final system shall be thoroughly validated in the product and manufacturing. 4.4 Material Properties Materials supplied to this specification shall be appropriate for their intended use. Material requirements listed are intended as a guideline to meet the intended finished

41、component requirements. 4.4.1 Polymeric Fiber (Types I, IV, V, VI and XI if applicable) The polymeric fiber will consist of an engineered blend of spun polyester thermoplastic fibers. Fibers will be surface treated in such a manner that interference with fasteners (attaching and twisting with the fa

42、stener) 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 satisfy this requirement. Other materials such as Thinsulate Acoustic Insulation may have a polypropylene or polyester scrim or emboss

43、ed surface to provide enhanced strength and abrasion resistance. 4.4.2 Glass Fiber (Types IV, V, VI and VIII if applicable) The basic glass fiber shall be of rotary type with an average diameter of (.00030 .00002 mils). The glass fibers shall be bonded with 5% 1% (by weight) phenolic binder (thermos

44、etting resin). Fibers will be surface treated in such a manner that interference with fasteners (attaching and twisting with the fastener) will be minimized. 4.4.3 Urethane Foam (Types II and IV) Urethane foam per MPAPS L-6505 Type I, Density = 16 1.6 kg/m (1 0.1 lbm/ft) 4.4.4 Polyethylene Foam (Typ

45、e III) To Be Determined (TBD) 4.4.5 Metalized Polyester Film (Type IV) - (TBD) 4.4.6 Aluminum Foil Aluminum foil per MPAPS C-10, minimum thickness of 0.006 inches 4.4.7 Stainless Steel Foil or Sheet (Type VI) Stainless steel foil or sheet per MPAPS A-37, minimum thickness of 0.0005 inches 4.4.8 Sili

46、cone Sponge (Type IX) 2D1A4 per ASTM D 1056 4.4.9 Fiberglass Cloth (Type X) The fiber glass cloth must have average thickness of at least 0.25 mm and an average cloth weight of 0.3 kg/m2 0.05 kg/m2. A plain weave pattern should be used. 4.4.10 Pressure Sensitive Adhesive (PSA) Film Acrylic See 2.13

47、for Fastening Considerations. This product is typically limited to applications up to 125C (please consult Materials Engineering for applications or claims exceeding this limit). 4.4.11 Pressure Sensitive Adhesive (PSA) Film Silicone See 2.13 for Fastening Considerations. This product is typically l

48、imited to applications up to 200C (please consult Materials Engineering for applications or claims exceeding this limit). NUMBER: MPAPS L-6610 TITLE: Thermal Insulation REVISION: 1709 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. SEPTEMBER 2017 Page 5 of 9 4.5 Insulation Density and Thermal Conductivity Requirements (k value) Type Density per ASTM D 1117 kg/m3 (lbs/ft3) 15% Thermal Conducti