FORD WSL-M98D29-A-2010 COMPOSITE FUEL TANK HIGH DENSITY POLYETHYLENE (PE-HD) LINEAR LOW DENSITY POLYETHYLENE (PE-LLD) TIE LAYERS ETHYLENE VINYL ALCOHOL (E VAL) BARRIER TO BE USED .pdf
《FORD WSL-M98D29-A-2010 COMPOSITE FUEL TANK HIGH DENSITY POLYETHYLENE (PE-HD) LINEAR LOW DENSITY POLYETHYLENE (PE-LLD) TIE LAYERS ETHYLENE VINYL ALCOHOL (E VAL) BARRIER TO BE USED .pdf》由会员分享,可在线阅读,更多相关《FORD WSL-M98D29-A-2010 COMPOSITE FUEL TANK HIGH DENSITY POLYETHYLENE (PE-HD) LINEAR LOW DENSITY POLYETHYLENE (PE-LLD) TIE LAYERS ETHYLENE VINYL ALCOHOL (E VAL) BARRIER TO BE USED .pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 03 04 Revised See Summary of Revisions J. Souza, SA 2006 09 29 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.10 & 4 1996 02 08 Activated J.D. Rehkopf L.R. Gullen Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, L
2、LC Page 1 of 8 COMPOSITE, FUEL TANK HIGH DENSITY WSL-M98D29-A POLYETHYLENE (PE-HD), LINEAR LOW DENSITY POLYETHYLENE (PE-LLD) TIE LAYERS, ETHYLENE VINYL ALCOHOL (E/VAL) BARRIER 1. SCOPE The material defined by this specification is a thermoplastic blow molded composite based on high molecular weight
3、PE-HD, E/VAL and PE-LLD tie layers (Figure 1). This specification defines a composite material used in manufacturing of blow molded fuel tanks and similar articles. The composite consists of a coextruded and blow molded high density polyethylene, barrier layer of ethylene/vinyl alcohol and tie layer
4、s of linear low density polyethylene, and has excellent chemical resistance and low fuel permeation characteristics. 2. APPLICATION This specification was released originally for materials used for composite fuel tanks which meet CARB/EPA Clean Air Act Requirements in Passenger Car and Truck Applica
5、tions. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data
6、 representing 3 sigma values. 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens The following tests shall be performed on test specimens cut (in accordance with the ISO methods specified) from blow molded fuel tanks. Specimens are tested with the as-molded thickness of the fuel tank and a
7、re not machined to meet the thickness requirements of the Standard Test Methods except where necessary for fixturing. Greater variation in test values can be anticipated when evaluating materials that are thinner than recommended by an applicable Industry Standard/Test Method. The following dimensio
8、ns are required: A. 150 min x 20/10 +/- 0.2 mm (Tensile Bar, ISO 527) B. 80 x 10 +/- 0.2 mm (Flexure Bar, ISO 178) C. 60 x 10/3, r = 15 mm (Tensile Impact Bar, ISO 8256) ENGINEERING MATERIAL SPECIFICATIONWSL-M98D29-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2
9、 of 8 3.4.2 Density 0.940 - 0.960 (ISO 1183, Method A) g/cm33.4.3 Tensile Properties (ISO 527, 50 mm/minute test speed, 150 min x 20/10 +/- 0.2 mm specimen) 3.4.3.1 Tensile Strength at 20 MPa Yield, min (Test Method according to para 3.4.3)3.4.3.2 Elongation at Yield, min 10% (Test Method according
10、to para 3.4.3)3.4.3.3 Elongation at Break of 25% E/VAL Layer, min (Test Method according to para 3.4.3, noting that E/VAL layer typically fractures before PE layers) 3.4.3.4 Elongation at Break of 40% PE-HD Layer, min (Test Method according to para 3.4.3, reflecting first fracture of one of the PE-H
11、D layers) Note: Yield is defined as the first point on the engineering stress-strain curve at which the stress does not increase with increasing strain. Break of E/VAL layer (para 3.4.3.3) can be detected by an audible cracking sound. Break of PE-HD layer (para 3.4.3.4) is the first fracture of the
12、regrind or PE-HD layers. 3.4.4 Flexural Modulus, min 750 MPa (ISO 178, 80 x 10 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) 3.4.5 Tensile Impact Strength, min (ISO 8256, 60 x 10/3, r = 15 mm specimen / ASTM D1822 Type L) 3.4.5.1 At 23 +/- 2 C, min 100 kJ/m2 / 200 kJ/m23.4.5.2 At
13、-40 +/- 2 C, min 30 kJ/m2 /175 J/m23.4.6 Heat Deflection Temperature, min (ISO 75, 120 x 10 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection) 3.4.6.1 At 1.82 MPa 35 C ENGINEERING MATERIAL SPECIFICATIONWSL-M98D29-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of
14、 8 3.4.7 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/ h, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.4.7.1 Tensile Strength at +/- 25% change Yield (Test Method per para 3.4.3.1) 3.4.7.2 Tensile Impact Stren
15、gth 80 kJ/m2min at 23 C, max and +/- 50% (Test Method per para change max 3.4.5.1) 3.4.8 Adhesion Strength, min 3 N/mm (FLTM BO 101-06, T-Peel test, 127 x 12.7 mm specimen, 50 mm/min) 3.4.9 Resistance to Fuel (ISO 1817, complete immersion in fuel at 40 +/- 2 C for 1000 h) Testing is to be completed
16、within 30 minutes after the coupons have been removed from the fuel. Coupons should be wrapped in aluminum foil as long as practical between removal and testing to minimize drying. The following requirements shall be met for: Fuel C +15% Methanol 3.4.9.1 Tensile Strength at 16 MPa Yield, min (Test M
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