GB/T 25257-2010Optical functional films - Determination of warping degree (English PDF)

1 Scope

This standard specifies the method for determination of warpage of the optical functional film.

This standard applies to the determination of the optical functional film warpage.

2 Terms and definitions

The following terms and definitions apply to this document.

3 Select Sample

Warpage of the test specimen should be representative of the shaft into a film should be discarded and the outer layer of the sample 2-3, and direction of the sample to be

Labeling; samples usually rectangular, which will help to identify the direction of the film for processing.

a) shall select A4 (21mm × 29.7mm) size of the test samples were warp; the special needs of the occasion, according to the supply-side and demand-side

The two sides previously agreed to crop size and testing;

b) the apparent sample should be no creases, scratches, bubbles, foreign bodies, water spots and other ills, trimming should be smooth, no glitches, no gap;

c) the preparation and testing of the sample, the operator should wear gloves yarn and avoid breathing directly at the sample;

d) each sample of at least 3 specimens tested.

4 Test conditions

All samples should be ± 23 °C 2 °C and at a relative humidity of 50% ± 5% environmental balance, equilibrium time is generally 2h ~ 8h. level

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