1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2016 11 23 Released C. Saige, NA Controlled document at www.MATS Copyright 2016, Ford Global Technologies, Inc. Page 1 of 3 TUBING, POLYOLEFIN, SINGLE WALL, HEAT SHRINKABLE WSS-M99D69-A1 TUBING, POLYOLEFIN, SINGLE WALL, HEAT SHRINKABLE, WSS-M
2、99D69-A2 FLAME RETARDANT 1. SCOPE The material defined by these specifications is a crosslinked polyolefin tubing whose diameter shall reduce to a predetermined size upon application of heat in excess of 135 C. The tubing shall be fabricated from an irradiated, thermally stabilized, modified polyole
3、fin composition. 2. APPLICATION These specifications were originally released for material used as insulation by placing over the part to be protected and heating until it shrinks down tight, such as on eyelet terminal crimps and windshield wiper switch leads. WSS-M99D69-A1 This material is intended
4、 for application where no flame retardant is needed. WSS-M99D69-A2 This material is intended for application where flame retardant is required. 3. REQUIREMENTS 3.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources identified on the Ford Approved Source List (
5、ASL) can be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at or available externally through a Ford Materials Engineer. 3.2 CONDITIONING AND TEST CONDITIONS All test values are based on material conditioned f
6、or not less than 24 h prior to testing in a controlled environment of 23 +/- 2 C and 50 +/- 5% relative humidity. Testing of the material should occur in the conditioning environment or soon after removal. 3.3 FORMED PARTS The tubing shall be fabricated from thermally stabilized, modified polyolefin
7、 and shall be crosslinked by irradiation. It shall be homogeneous and essentially free from flaws, defects, pinholes, bubbles, seams, cracks, and inclusions. 3.3.1 Dimensions As specified on (ASTM D2671) engineering drawing Shall be specified before and after shrink. 3.3.2 Longitudinal Change +0%, -
8、5% (ASTM D2671) ENGINEERING MATERIAL SPECIFICATION WSS-M99D69-A1/A2 Copyright 2016, Ford Global Technologies, Inc. Page 2 of 3 3.4 SPECIFIC GRAVITY (ASTM D2671 A1 1.00 +/- 0.10 g/cm3 A2 1.35 +/- 0.15 g/cm3 3.5 LOW TEMPERATURE FLEXIBILITY AT -55 C No cracking (ASTM D2671, Procedure C) Test Method: Sp
9、ecimens of tubing, as supplied (sizes as described in ASTM D 2671, Procedure C) and a mandrel (see Table 1 for size) shall be conditioned for 4 h at -55 +/- 2 C. While at this temperature, the specimens shall be wrapped around the mandrel for at least 360 in approximately 2 s. 3.6 HEAT SHOCK (ASTM D
10、2671, 250 C, 150 mm specimen length) Specimens of tubing shall be conditioned for 4 h in a 250 +/- 5 C oven. The specimens shall be removed from the oven, cooled to 23 +/-2 C, and then visually examined for evidence of dripping, flowing, or cracking in the polyolefin. Any side cracking caused by fla
11、ttening of the specimen on the mandrel shall not constitute failure A1 Bend 180 over mandrel specified in Table II with no cracking observed. A2 No signs of dripping, flowing, or cracking 3.7 COPPER MIRROR CORROSION No corrosion (ASTM D2671, Procedure A, 16 h at 175 C) 3.8 DIELECTRIC STRENGTH 20 kV/
12、mm min (ASTM D2671, short time) 3.9 FLAMMABILITY, WSS-M99D69-A2 ONLY (SAE J1128, para 6.6 Resistance to Flame Propagation No dripping or flowing or ISO 6722-1, para 5.22 Resistance to Flame Propagation) and no more than Shall not continue to burn for more than 60 s 25% of the indicator flag burned.
13、3.10 COLOR 3.10.1 WSS-M99D69-A1 Clear 3.10.2 WSS-M99D69-A2 Black or as specified on Engineering Drawing 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Mat
14、erial Specifications. 4.1 TEMPERATURE RANGE Material is stable from -55 C to: 135 C continuous 150 C 1000 h 175 C 168 h 200 C 24 h ENGINEERING MATERIAL SPECIFICATION WSS-M99D69-A1/A2 Copyright 2016, Ford Global Technologies, Inc. Page 3 of 3 250 C 4 h 300 C 1 h 4.2 APPROVAL OF MATERIALS Suppliers de
15、siring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, and Materials Engineering. The supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test faci
16、lity, demonstrating full compliance with all the requirements of the Material Specification. Tested material samples must be available for review upon request and kept for a minimum of one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and
17、 Effects Analysis, Control Plans, Certification testing) with Ford. 4.3 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any changes to the material originally approved, whether or not
18、 such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for En
19、gineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for Design Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.4 RESTRICTED SUBSTAN
20、CE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addressed by this document. The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility t
21、o comply with this standard on a continuing basis through IMDS and or GMAP reporting. TABLE II MANDREL DIMENSIONS FOR HEAT SHOCK AND LOW TEMPERATURE FLEXIBILITY Tubing Size, in. Mandrel Diameter, in. (mm) 3/64 1/4 inclusive 5/16 (7.95) 3/8 1/2 inclusive 3/8 (9.53) 3/4 - 2 inclusive 7/16 (11.13) 3 - 4 inclusive 7/8 (22.23) 5. SUMMARY OF REVISIONS
