1、 FORD LABORATORY TEST METHOD BO 114-03 Date Action Revisions 2001 03 28 Revised Editorial no technical change A. Cockman 1999 01 19 Printed copies are uncontrolled Page 1 of 3 Copyright 2001, Ford Global Technologies, Inc. ULTRAVIOLET STABILITY OF AUTOMOTIVE SAFETY GLASS Application This test method
2、 describes a procedure for determining the ultraviolet stability of automotive laminated safety glass utilizing outdoor exposure and accelerated laboratory testing procedures. Scope Ultraviolet radiation can cause bleaching or fading of colors; resistance to such fading is an important property of t
3、he gradient band. This procedure describes standard methods for both outdoor exposure and accelerated laboratory testing of the stability of the gradient band toward UV. The testing described below is considered the absolute minimum required. Apparatus Required Weatherometer Atlas CI Series Xenon Ar
4、c Weatherometer (or equivalent) Color Measurement Apparatus BYK Gardner Color Machine - Model TCS Plus or equivalent Source: BYK Gardner USA 9104 Guilford Rd. Columbus, Maryland 21046 Tel: (800) 713-5307 (301) 483-6500 Fax: (800) 394-8215 Conditioning and Test Conditions All test values indicated he
5、rein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD BO 114-03 Page 2 of 3 Copyright 2001, Ford Global Tech
6、nologies, Inc. Procedure Laminate Sample Preparation 1. Prepare eight laminate specimens 150 x 150 mm for outdoor testing in Arizona. 2. Prepare four laminate specimens 50 x 125 mm for accelerated testing. 3. All laminate specimens shall be marked or coded in the upper left hand corner. Outdoor Ariz
7、ona Testing (DSET Laboratories) 1. Measure the transmission gradients of all specimens before exposure. 2. Specimen shall be exposed at 5 deg south. 3. Specimen shall be placed on exposure racks so that the markings or codings are in the upper left hand corner of the side facing the sun. 4. Specimen
8、 shall be exposed to 6, 12 and 24 months. 5. Two specimens shall be evaluated after each exposure period. Indoor Accelerated Testing - Weatherometer Apparatus 1. Measure the transmission gradients of all specimen before exposure. 2. Specimen shall be exposed for 500 h. 3. Evaluate after 500 h and re
9、turn to the Weatherometer for an additional 500 h. 4. Evaluate after a total of 1000 h exposure, or as specified in the relevant Engineering Material Specification. Evaluation 1. Use the Byk Gardner Color Machine Model TCS Plus, or equivalent for all measurements. 2. For low transmission gradients,
10、such as 100506, find an area of 25 % transmission based on Ill A, 2 deg observer. Using the vernier, note the location for future measurements. 3. Run a complete spectral scan. 4. For higher transmission gradients, such as 312500, find an area of 35 % T and proceed as above. FORD LABORATORY TEST MET
11、HOD BO 114-03 Page 3 of 3 Copyright 2001, Ford Global Technologies, Inc. 5. The program will automatically calculate tristimulus values (X, Y, Z) and color space coordinates for Illuminant A (2 deg observer), and Illuminants C and D 65 (10 deg observer). 6. Calculate Delta C and Delta E values using
12、 before and after exposure results. Use color space coordinates L*, a*, or b*) and appropriate illuminant and observer. Delta C = (a2 - a1)2+ (b2 - b1)2)0.5 Delta E = (a2 - a1)2 + (b2 - B1)2 + (L2 - L1)2)0.5 7. Record all data. General Information In addition to the clear glass laminates, laminates
13、may be tested with various non-clear glasses, such as double tinted or hybrid configurations. Other accelerated tests may be used in addition to the Weatherometer. These include EMMA (normally 100K langleys) and Xenon Arc Weatherometer (1000 hours). Sample sizes are the same as for the Weatherometer
14、. Although commercial decisions are based on the 12 month Arizona testing described above, additional samples are often exposed for another 12 months (total of 24 months). These additional samples are for informational purposes only. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities.
