Standard Test Method for Resistance of Transparent Plastics to Surface Abrasion
|Publication Date:||30 July 1982|
|ICS Code (Plastics in general):||83.080.01|
This method describes a procedure for estimating the resistance of transparent plastics to one kind of surface abrasion by measurement of its optical effects.
Abrasive damage is judged by that percentage of transmitted light which, in passing through the abraded track, deviates from the incident beam by forward scattering. For the purpose of this method, only light flux deviating more than 0.044 rad (2.5°) on the average is considered in this assessment of abrasive damage.
The values stated in SI units are to be regarded as the standard.
NOTE I-Recent attempts to employ the Taber Abraser for volume loss determinations of various plastics, like earlier ones,2 have been unsuccessful because of excessively large coefficients of variation attributed to the data. Insufficient agreement among the participating laboratories has rendered the use of volume loss procedure inadvisable as an ASTM test method.
NOTE 2-For determining resistance to abrasion of plastics by measurement of volume loss, reference should be made to ASTM Methods 0 1242, Test for Resistance of Plastic Materials to Abrasion.3
2 Research reports, summarizing the results of the early and recent round robins, are available on loan from ASTM Headquarters. 1916 Race SI.. Philadelphia, Pa, 19103. Request RR:D20-48 and RR:D20-1090, respectively,
3 Annual Book of ASTM Standards, Part 35.