1、 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. Ga42001 by International Truck and Engine Corporation. OCTOBER 2001 Page 1 o
2、f 2 INTERNATIONAL TRUCK AND ENGINE CORPORATION CEMS (CORPORATE ENGINEERING MATERIAL SPECIFICATION)NUMBER: CEMS DT-11 TITLE: Heat Stability of Thermoplastic Trim Materials CURRENT ISSUE DATE: October 2001 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE O
3、F: July 1999 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT 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 approp
4、riate safety and health practices and to determine the applicability of regulatory limits prior to use. Change Notice: Reformatted and Editorial Changes 1.0 SCOPE This method measures the thermal stability of thermoplastics by measuring the sag of the test panels exposed to elevated temperatures. 2.
5、0 APPARATUS 2.1 Oven (capable of 60C(140F) to 130 C(260F) 2.2 Calipers or other measuring device. 2.3 Fixture for holding a test panel horizontally or a part in “Truck Position” that would provide an accessible reference point or points for measuring the sag from the center of a panel or from variou
6、s points along a part. 3.0 MATERIAL 3.1 3” x 9” test panel or interior part 3.2 Permanent ink marker 4.0 PROCEDURE 4.1 Place the panel or part in an appropriate fixture 4.2 Mark the center of the test panel or points of measurement along a part with a permanent marker. 4.3 Measure and record the dis
7、tance from a reference point(s) on the fixture to either the center of a test panel or from points marked along an interior part (reference points must be directly above or below the point(s) of measurement). 4.4 Record the measurement or measurements as the initial distance. 4.5 Place the panel or
8、part, attached to its respective fixture, inside an oven preset to the specified temperature for one hour. 4.6 Remove the fixtured panel or part and let cool to room temperature. 4.7 Measure and record the distances from the reference point(s) on a fixture to the center of the panel or points of mea
9、surement along a part as the final distance. NUMBER: CEMS DT-11 TITLE: Heat Stability of Thermoplastic Trim Materials CURRENT ISSUE DATE: October 2001 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Te
10、chnical Standards. Suppliers are required to assume all patent liability. Ga42001 by International Truck and Engine Corporation. OCTOBER 2001 Page 2 of 2 4.8 Determine the sag of the panel or part by determining the difference between the initial distance and the final distance. 4.9 Record the sag o
11、f the panel or sag at various points of a part. 4.10 Repeat the above steps at various oven temperatures (10 to 20F increments), with a new panel or part as required, to provide a graph curve representing the short-term temperature deflection. 5.0 REPORT 5.1 Report the measured deflection value(s) and include the graph or curve.
