A liquid crystal substrate spacer paper and its manufacturing method

Abstract

The invention provides liquid crystal substrate interleaving paper which is used for lining between liquid crystal substrates, aiming at preventing scrapes and scratches in a production process. The unit area of a paper sheet is quantified to 50+ / -2g / m<2> and the stiffness of finished paper is smaller than 10 degrees; the longitudinal tensile strength is more than or equal to 4.5kN / m; the thickness of the paper sheet is 50mu.m to 110mu.m; the surface strength of the finished paper is 16A to 18A; the weight percent of moisture is 4 percent to 8 percent; meanwhile, the total quantity of dust particles on the surface of each piece of lining paper is smaller than 120. A manufacturing method comprises: taking softwood pulp and hardwood pulp at the mass ratio of (2 to 3) to (0.5 to 1), wherein the beating degree is 40 degrees SR to 45 degrees SR and the wet weight is more than or equal to 7g; carrying out papermaking and adjusting a jet / wire speed ratio to be 0.92 to 0.95; decompressing positive pressure to 0.4MPa to 0.45MPa, and re-pressing to 0.4Mpa; carrying out secondary coating and gluing in an impregnation manner; carrying out primary oxidized starch coating until the concentration is 6 percent to 8 percent; after slitting, carrying out secondary coating on the paper sheet through polyvinyl alcohol with the concentration of 7 percent to 9 percent; drying the paper sheet, and carrying out dust removal through ACE non-contact type dust removing equipment; checking.

Description

Technical field [0001] The invention relates to special paper, a spacer paper that is lined in the production process of a liquid crystal substrate, which plays a protective role, and a manufacturing method thereof. Background technique [0002] The surface of the liquid crystal substrate is flat, and the interval between the front plate and the rear plate needs to be controlled within a few μm. [0003] In order to avoid surface defects such as scratches and pollution on the effective surface of the substrate glass during the production process, a spacer paper needs to be lined between the front plate and the back plate. [0004] The liquid crystal substrate is very different from general glass, and the surface has extremely high requirements for dust. The size of dust particles is mainly divided into three types, 1-3μm for small particles, 3-5μm for medium particles, and larger than 5μm for large particles. Each separation paper requires total dust particles less than 120, large p...

AI Technical Summary

Problems solved by technology

However, due to the uncertainty of the arrival time of imported paper and the long distance, it seriously affects the use of users. The price of imported paper pads is about 15,000 to 17,000 yuan per ton, which increases the production cost of users.

In the production process of domestic conventional paper, in order to ensure the strength of the paper, paper mills generally add a series of additives during the production process, but some components in the additives will pollute the surface of the liquid crystal substrate, resulting in stains that are difficult to remove, which cannot meet the needs of use. Require

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