Paper quality management method and glass substrate backing paper making method

Abstract

The invention provides a paper quality management method and a glass substrate backing paper making method. The paper quality management method is characterized in that a water spray nozzle is used for cutting off paper to selectively make the edge part (P) of the paper on a paper machine (10) at a papermaking process, the size of foreign matters contained in the edge part (P) is detected and determined, and quality management is conducted to the paper (36) made by the paper machine (10) according to the inspection result of the size of the foreign matters contained in the edge part (P). In other words, the specific size of the foreign matters causing flaws to a glass substrate (G) is taken as a threshold and classification management is conducted to the paper (36) batch by batch. The threshold, i.e. the threshold of the specific size of the foreign matters causing the flaws to the glass substrate (G) is 200mum according to experiments. Therefore, the selected paper with the edge part (P) containing the foreign matters with the size being below 200mum can be used as transport backing paper for the glass substrate (G) for a flat panel display, and the backing paper and other paper can be managed batch by batch.

Description

technical field [0001] The present invention relates to a quality control method for paper and a method for producing a storage liner paper and / or a transport liner paper for a glass substrate for a flat panel display, and relates to a method for selectively using the paper for storing or transporting a flat panel display (hereinafter also referred to as FPD (Flat Panel Display) is a glass substrate for Flat Panel Display), a method for quality control of paper suitable for the liner paper sandwiched between the glass substrates, and a liner paper for storage and / or a liner paper for transportation of glass substrates for flat panel displays. manufacturing method. Background technique [0002] Regarding glass substrates for FPDs such as glass substrates for plasma displays and glass substrates for liquid crystals, flaws or contamination on the surface are likely to occur during storage and / or transportation, resulting in product defects. In particular, when an alkali-free g...

AI Technical Summary

Problems solved by technology

[0005] However, in the method of sandwiching the spacer paper, since the spacer paper and the surface of the glass substrate are in direct contact, the resin component of the spacer paper is transferred to the surface of the glass substrate, causing a problem of contaminating the surface of the glass substrate.

In order to avoid this problem, methods such as using liner paper with a low resin component content are currently used, but in fact it is extremely difficult to precisely control the amount of resin component transferred from the liner paper. In addition, such liner paper Compared with ordinary paper, the price is high, which will cause an increase in cost

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