1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 08 24 Revised Format Change Only 2002 06 13 Activated B. Hennessey Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 4 HOSE, AIR CONDITIONING REFRIGERANT (POLYAMIDE 6 BARRIER) WSS-M96D25-A6 RESISTANT
2、, MEDIUM PRESSURE 1. SCOPE The material defined by this specification is a polychloroprene (CR)/polyamide 6/polychloroprene inner layer, high tensile polyester reinforcement/butyl rubber (IIR) covered, medium pressure refrigerant hose. 2. APPLICATION This specification was released originally for ho
3、se designed for use with Refrigerant R-134a and refrigerant oils that must be serviceable over an ambient temperature range of -40 C to +125 C, an operating temperature of -40 C to +125 C and a maximum operating pressure of 3.4 MPa. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS
4、Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CONSTRUCTION The hose shall consist of a seamless smooth bore inner tube of a polychloroprene, polyamide 6 barrier, polychloroprene layered construction, reinforced
5、 with a high tensile ply or plies of polyester fabric bonded to the inner tube, and a butyl rubber weather resistant outer cover. The outer cover shall be perforated (pin pricked). 3.3 MOLDED TEST SPECIMEN/TEST SLABS 3.3.1 Preparation of Test Specimens- Nylon Core Unless otherwise specified all test
6、s shall be carried out on extrusion molded specimens. The specimens shall be prepared according to ASTM D 1879. The test specimens have the following dimensions: 150 x 12.7 mm x 3.2 +/- 0.2 mm (tensile bar) and 120 x 12.7 x 3.2 +/- 0.2 mm (flex bar). No annealing allowed. 3.3.2 Preparation of Test S
7、pecimens- Polychloroprene and Butyl Rubber Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut from molded test slabs manufactured from the same material and with equivalent cure to molded parts are recommended. The test slabs shall have t
8、he following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm. ENGINEERING MATERIAL SPECIFICATION WSS-M96D25-A6 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 4 Polyamide Elastomer Elastomer Barrier (CR) layer (IIR) Cover 3.3.3 Density, g/cm3 1.09 - 1.19 1.40 -
9、 1.55 1.05 - 1.30 (ISO 1183, Method A/ ASTM D 297) 3.3.4 Hardness, Durometer A - 80 - 90 60 - 80 (ISO 868/ASTM D 2240, Instantaneous plied-up specimen. Hand held durometers shall not be used.) 3.3.5 Tensile Strength, MPa, min 17.2 9.0 6.2 (ISO 37/ASTM D 412, Die C) 3.3.6 Elongation, % 200 150 125 (I
10、SO 37/ASTM D 412 Die C) 3.3.7 Melt Temperature, C, min 200 - - (ASTM D 789) 3.3.8 Flexural Modulus, MPa, max 3000 - - (ASTM D 790, Method I, Procedure A) 3.3.9 Moisture Content, %, max 0.08 - - 3.3.10 Ozone Resistance, max - - Rating 0 (ASTM D 1171, Method A, 70 h at 50 pphm) Polyamide Elastomer Ela
11、stomer Barrier (CR) layer (IIR) Cover 3.4 HEAT AGED PROPERTIES - - 125 C (ISO 188/ASTM D 573, 1000h) Hardness Change, max. - - +10 Tensile Strength Change, % max. - - -20 Elongation Change, % max. - - -45 ENGINEERING MATERIAL SPECIFICATION WSS-M96D25-A6 Printed copies are uncontrolled Copyright 2006
12、, Ford Global Technologies, LLC Page 3 of 4 3.5 DIMENSIONS The hose shall conform to the dimensions and tolerances specified in Table 1. Measurement shall be made in accordance with ASTM D 380. Table 1 Barrier Hose Material Hose Size (mm) Min Inside Diameter mm Max Inside Diameter mm Min Outside Dia
13、meter mm Max Outside Diameter mm Concentricity TIR mm 8 mm 7.90 8.60 14.20 15.20 0.76 10 mm 10.20 11.20 16.80 17.80 0.76 13 mm 12.50 13.50 18.90 19.90 0.76 16 mm 15.60 16.60 23.10 24.10 0.76 19 mm 18.90 19.90 26.90 27.90 0.76 3.6 WEIGHT LOSS , max 0.5% (After 8 h at 70 +/- 2 C) 3.7 ADHESION, min (AS
14、TM D 413, ring specimen, Type A) 3.7.1 Nylon to Rubber Layer Stock Tear. 3.7.2 Second Rubber layer to Reinforcement 31N 3.7.3 Reinforcement to Cover 22N 3.8 IDENTIFICATION The hose shall be identified as follows: a) Hose supplier identification code. b) Hose I.D. in millimeters c) Four digit date co
15、de d) Color of letter Yellow or White. The following code format is recommended, but not mandatory: G 2 01 Where: G =Plant Designation 2 =Year (single digit) 01 =Week (two digit number) These markings shall appear at intervals not greater than 305 mm. The markings shall not be soluble in water, auto
16、matic transmission fluid or fluids used in the engine compartment and shall withstand normal handling without smearing ENGINEERING MATERIAL SPECIFICATION WSS-M96D25-A6 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 4 4. GENERAL INFORMATION The information giv
17、en below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 For information on currently approved refrigerants for use in this specification contact: Materials Technology Center 15/GM POEE Research & Engineering Center 21500 Oakwood Blvd Ford Motor Company Dearborn Laindon, Basildon MI 48124-4091 Essex SS15 6EE, England U.S.A. Materials Engineering Product Engineering Office Ford Motor Co. of Australia, Ltd. Princes Highway, Norlane Victoria 3214, Australia 4.2 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES CR, PA6, CR, PET,IIR
