GB/T 36952-2018 (English Version)

Standard No.: GB/T 36952-2018
Language: Chinese, Available in English version
Release Date: 2018
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 36952-2018

Scope: This standard specifies the test method for the scratch resistance of the polarizing film surface of flat panel displays. This standard is applicable to the test of the scratch resistance of the polarizing film surface of flat panel displays.

Introduction

GB/T 36952—2018 Standard Overview

GB/T 36952—2018 "Test Method for Surface Scratch Resistance of Polarizing Film for Flat Panel Display (FPD)" is an important national standard that aims to standardize the test method for the surface scratch resistance of polarizing film for flat panel display during use. This standard is proposed and managed by the National Technical Committee for Standardization of Semiconductor Equipment and Materials, and is applicable to all enterprises involved in the manufacture and testing of polarizing film for flat panel display.

Background and Significance of Standard Formulation

With the rapid development of flat panel display technology, polarizing film, as a key component, plays an important role in devices such as smartphones, tablets, and televisions. However, polarizing film is easily affected by external friction and scratches during use, resulting in a decrease in display quality. Therefore, it is particularly important to formulate a unified scratch resistance test standard.

The formulation of this standard fills the technical gap in related fields in China, provides a scientific basis for the quality assessment of polarizing film, and also promotes the healthy development of the flat panel display industry.

Comparison table of standard frameworks

Standard dimensions	GB/T 36952—2018	Reference standard GB/T 31379—2015	Industry requirements
Test method	Scratch method	Similar but not specific	High consistency
Test equipment	Abrasion tester + steel wool	General equipment requirements	Special equipment recommendation
Environmental conditions	Temperature: 25°C ±5°C, Humidity: 50%~80%	No clear requirements	More stringent control

Test steps and technical points

Test sample preparation

The test sample needs to be cut from the polarizing film to be tested. The recommended size is 30mm~70mm wide and 110mm~160mm long. The sample should be kept flat and ensure that there are no obvious defects.

Abrasion test machine operation specifications

Abrasion test machine is the core equipment of the test and needs to have the function of fixing the sample to ensure that the sample does not move during the friction process. Steel wool uses 0000# model, and its average wire diameter is about 0.012mm.

Friction and observation conditions

The number of frictions is set to 10 times, and the speed is controlled at 80mm/s~120mm/s. The load per unit area is 0.80N/cm²~2.45N/cm². After the test, the surface scratches of the sample need to be visually inspected in a dark room under 10klx fluorescent reflection conditions.

Implementation suggestions and precautions

Equipment calibration:Regularly calibrate the wear tester to ensure the accuracy of friction speed and load.
Steel wool management:New steel wool needs to be run-in to eliminate burrs and oxidation effects. Pay attention to the replacement frequency during use to avoid repeated use resulting in deviation in test results.
Environmental control:Strictly follow the temperature and humidity conditions required by the standard to ensure the comparability and accuracy of the test data.
Records and Reports: Record all parameters during the test in detail, and clearly mark the fixing direction of the steel wool (vertical or parallel) and its impact on the results in the report.

GB/T 36952-2018 Referenced Document

GB/T 31379-2015 Test method for flat panel display (FPD) polarizing films

GB/T 36952-2018 history

2018 GB/T 36952-2018 Test method for surface scratch resistance of flat panel display（FPD）polarizing film