1、Page 1 of 4 INTERNATIONAL TRUCK AND ENGINE CORPORATION TMS (TRUCK MATERIAL SPECIFICATION) NUMBER: TMS-7055 TITLE: Acetals, Molded REVISION: F WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering DATE ISSUED: August 2005 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURR
2、ENT 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 o
3、f regulatory limits prior to use. Change Notice: Modified Section 4.2.1 on accelerated weathering. Reference: File 30-14D Keywords: Molded Acetals 1.0 APPLICATION This specification covers acetal homopolymer and copolymer type plastics for manufacture of finished parts by injection molding or extrus
4、ion. Parts such as washers, bearings, and gears are typical applications. 2.0 SCOPE This specification covers the physical, mechanical and thermal properties of acetal plastics. It also covers additional processing requirements for specific applications, quality, source approval and quality control.
5、 3.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following standards, specifications and regulations are referenced in this specification. Quality System Standard QS-9000 (ISO 9000 or TS-16949) ASTM D 256 INTERNATIONAL IQR Quality Sta
6、ndard ASTM D 638 ASTM D 2117 INTERNATIONAL Manufacturing Standard D-13 ASTM D 790 FMVSS-302 CFR Title 29, Part 1910 ASTM D 792 ASTM D 648 INTERNATIONAL CEMS G-5 TMS-9544 CEMS GT-31 4.0 REQUIREMENTS 4.1 Basic Properties Material purchased to this specification shall meet the basic property requiremen
7、ts shown in the table. Properties are minimums unless otherwise indicated and shall be specified by designating either Type 1 for homopolymer or Type 2 for copolymer. See Table 1. This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without
8、 permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2005 by International Truck and Engine Corporation. AUGUST 2005 Page 1 of 4 NUMBER: TMS-7055 TITLE: Acetals, MoldedREVISION: F TABLE I Property ASTM Test Type 1 Acetal Homopolymer Type 2 Acetal Cop
9、olymer Tensile Strength D-638 69.0 MPa 58.6 MPa 10 000 psi 8 500 psi Specific Gravity D-792 1.425 1.410 Flexural Modulus 23C (73F) D-790 3.8 GPa 2.5 GPa 410 000 psi 360 000 psi Elongation Break, % D-638 15-75% 40-75% Deflection Temperature D-648 124C 110C 1820 kPa (264 psi) 255F 230F Izod Impact Str
10、ength D-256 0.10 J/mm of Notch 0.05 J/mm of Notch 2.0 ftlbf/in of Notch 1.0 ftlbf/in of Notch Crystalline Melt Point D-2117 175C 163C 347F 325F4.2 Suffixes Suffix letters indicate material or molded part property requirements in addition to those shown in the table. The following suffixes shall be u
11、sed to indicate additional required properties. 4.2.1 Accelerated Weathering C1: Interior parts, which are exposed to sunlight under glass, shall be tested per Method A of CEMS GT-31 for a minimum of 1200 kj. C2: Exterior parts, shall be tested per Method B of CEMS GT-31 for a minimum of 3600 kj. 4.
12、2.1.1 Required shall have no visible color change greater than E of 3. 4.2.2 D - Color Requirements D1 Pigmented part color shall be specified on the drawing per designation system in CEMS G-5. The pigment must be evenly dispersed to insure uniform coloring throughout the part. D2 Paint color shall
13、be specified on the drawing per designation system in CEMS G-5. Parts shall have surface preparation per DuPonts Satinizing Process (U.S. Pat. 3,235,426) before painting. 4.2.3 E -Surface Finish Requirements shall be noted as follows, and shall compare to finishes found in the SPI-SPE Mold Finish Co
14、mparison Kit (D-M-E Corporation): This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2005 by International Truck and Engine Corp
15、oration. AUGUST 2005 Page 2 of 4 NUMBER: TMS-7055 TITLE: Acetals, MoldedREVISION: F E1 No. 1 - 8000 Grit (#3 Micron Range) E2 No. 2 - 1200 Grit (#15 Micron Range) E3 No. 3 - 320 Emery Cloth E4 No. 4 - 280 Stone E5 No. 5 - 240 Dry Blast, 127 mm at 690 kPa (5 in distance at 100 psi) E6 No. 6 - 24 Grit
16、 Dry Blast, 76 mm at 690 kPa (3 in distance at 100 psi) 4.2.4 F - Flame Resistance Material and parts supplied to this specification shall conform to and be certified by the supplier to meet the requirements of the latest issue of the Federal Motor Vehicle Safety Standard No. 302 - Flammability of I
17、nterior Materials and the requirements of TMS-9544. 4.2.5 Z -Special Requirements Special requirements shall be shown on the drawing. 5.0 QUALITY Parts shall maintain pattern, color, and finish, and must match the approved prototype parts on file in the Industrial Design Department at TDTC. No voids
18、 in the material, surface defects, flash, or flow patterns are permissible. 6.0 SOURCE APPROVAL AND QUALITY CONTROL 6.1 Supplier Requirements All suppliers to INTERNATIONAL Truck and Engine are required to be registered to QS-9000 Quality System Requirements. INTERNATIONAL will also accept ISO 9000
19、or TS-16949 registration as long as the supplier 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 the INTERNATION
20、AL Corporate Buyer upon request. 6.2 Approval Parts supplied against contracts or purchase orders citing this specification shall be equivalent in all respects to those samples which were approved by the purchaser. No changes in formulation or processing practices are permitted without approval. In
21、the event that changes in material, properties, processing practices, construction, color, or labeling of the product are required, the supplier shall notify Materials Engineering at TDTC and Purchasing and Supplier Development of the proposed change(s). Test data indicating conformance to all requi
22、rements of this specification, test samples, and new or amended or updated Material Safety Data Sheet(s) (MSDS), in accordance with CFR Title 29, Part 1910 shall be submitted with the request for change. 6.3 Process Control The supplier shall either perform and report results of tests on specific lo
23、ts of parts produced or provide statistical evidence of the lot having been produced in a state of statistical control and with a process capable of providing all required properties. The part supplier and the plant metallurgist and/or the quality control manager of the using International plant may
24、 determine testing and reporting requirements on specific products. 7.0 SHIPPING, PACKING AND IDENTIFICATION Loading, packing, and identification shall be in accordance with Manufacturing Std. D-13. This document is restricted and may not be sent outside International Truck and Engine Corporation or
25、 reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2005 by International Truck and Engine Corporation. AUGUST 2005 Page 3 of 4 NUMBER: TMS-7055 TITLE: Acetals, MoldedREVISION: F 8.0 DESIGNATION ON DRAWINGS The material shall be d
26、esignated in the same manner as the following example: Acetal, Type 1, C1, E2 per TMS-7055 9.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Materials Engineering and Technology Dept. Truck Development and Technology Center (TDTC) 2911
27、 Meyer Road Fort Wayne, IN 46803 E-mail: MaterialsEngineeringNav-I This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2005 by International Truck and Engine Corporation. AUGUST 2005 Page 4 of 4
