1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 05 N-STATUS Replaced by WSS-M99P32-B; Ins 3.0; Del 3.1, 3.2, 3.3, 3.14 & 4 A. Reaume 1995 09 15 Activated D. Henrickson, LAG Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 3 MAT, POLYESTER, SPUN
2、 BONDED, LATEX IMPREGNATED, 370 g/m2WSS-M17H170-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a formable polyester fiber material, which provides acoustical properties without requiring a protective facing. 2. APPLICATION This specification was released origi
3、nally for material used as a hood insulator on the 1996 F-Series light truck. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Compan
4、ys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 APPEARANCE (FLTM BI 109-01) The color, pattern, and finish shall match the approved design center master sample, or shall be as specified on the engineering drawing. 3.5 CONSTRUCTION 3.5.1 Fiber Size and Description 8 - 10 dtex
5、ASTM D 1244) polyester 3.5.2 Thickness 0.85 - 1.40 mm (ASTM D 461, 29 - 204 mm diameter foot, 1.4 kPa pressure) 3.6 WEIGHT 370 +/- 50 g/m2(FLTM BN 106-01) 3.7 COMPOSITION, % by weight (ASTM D 276) Fiber (100% polyester), min 65% Latex impregnation, max 35% ENGINEERING MATERIAL SPECIFICATIONWSS-M17H
6、170-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 3 3.8 PHYSICAL PROPERTIES (All physical properties to be tested on original unaged specimens and after heat aging per para 3.8.5) 3.8.1 Breaking Strength, min (ASTM D 5034, grab method, 305 mm/minute jaw sp
7、eed) MD 850 N AMD 690 N 3.8.2 Elongation at Break, min (ASTM D 5034, grab method, 305 mm/minute jaw speed) MD 30% AMD 35% 3.8.3 Tear Strength (Trapezoid) min (ASTM D 1117, Integration method*) MD 145 N AMD 125 N *As approved by Materials Engineering. 3.8.4 Flexural Modulus, min 400 MPa (ISO R 527/AS
8、TM D 790M, Method I, sample size 12.7 x 50 mm, support span 25 mm, at 23 +/- 2 C) 3.8.5 Heat Aging, min Rating 4 - 5 (14 days at 150 +/- 2 C and ISO 105-A02/AATCC Evaluation Procedure 1) No individual yarn or combination of yarns shall exhibit fiber degradation or color tone change. Backcoatings, if
9、 applied, shall exhibit no color change or degradation. The material shall not exhibit any expansion, shrinkage, or warpage which will interfere with normal functional operation. 3.9 WEAR PROPERTIES 3.9.1 Abrasion, min (FLTM BN 108-02, H-10 wheels, 1 kg load and back with S-36 mounting cards) Origin
10、al 2% Heat Aged 2% ENGINEERING MATERIAL SPECIFICATIONWSS-M17H170-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 3 3.9.2 Resistance to Bearding No evidence of (SAE J948, Taber Method, bearding 50 cycles, 500 g load H-18 wheels, if required, back with S-36 mo
11、unting cards) 3.10 FLUID RESISTANCE, max, (volume swell) Motor Oil WSD-M2C904-A* +5% Brake Fluid ESA-M6C25-A* +5% Engine Coolant ESE-M97B44-A* +10% Transmission Fluid ESR-M2C138-CJ* +5% Window Washer Solvent ESR-M17P5-A* +10% 5% Aqueous NaCl Solution +5% 10% Aqueous H 2S04 Solution +5% Test Method:
12、Measure all three dimensions, then immerse in test fluids for 24 hours at room temperature. Remove and measure after 1 hour. *Or currently released equivalent fluid (see para 5.1.) 3.11 HOT WATER RESISTANCE, max, (volume swell) +10% Test samples immersed in water 95 C for 2 hours. Removed samples and recheck dimensions after 30 minutes. 3.12 SOUND ABSORPTION, % min 13 mm Air Gap 25 mm Air Gap (ASTM C 384/E 1050) 125 Hz 8 10 250 Hz 12 15 500 Hz 15 28 1000 Hz 46 64 2000 Hz 67 95 4000 Hz 98 85 6300 Hz 87 34 3.13 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute
