A kind of preparation method of ultra-low quantitative regenerated cellulose fiber screen

Abstract

The invention relates to a method for preparing an ultra-low quantitative regenerated cellulose fiber screen for paper repair, the method is as follows: nano-magnesium oxide, nano-titanium dioxide, nano-zinc oxide and cellulose / N-methylmorpholine oxide After the slurry is mixed, it is sprayed out through the device, air-stretched, desolventized, and curls are collected to obtain a quantitative value of 10.0g / m 2 -1.5g / m 2 Regenerated cellulose fiber mesh. The invention not only has a wide range of raw material sources, and the process is green and environmentally friendly, but also can be directly formed into a web without post-processing; in addition, the cellulose has the same composition as the paper, has good compatibility, low quantitative, high transparency, and does not affect the reading of the repaired paper; It also has the advantages of short preparation time, high output and quantitative control, and is suitable for large-scale continuous production.

Description

technical field [0001] The invention belongs to the field of preparation of environment-friendly polymer fiber web materials, and relates to a preparation method of regenerated cellulose fiber web. Background technique [0002] Silk screen reinforcement technology is a feasible emergency measure for repairing fragile documents with writing on both sides, especially for saving a batch of precious archives and documents that are on the verge of destruction. This technology was first successfully developed by Nanjing Museum, and it has been used in some collections. This technology uses a single silk to weave a screen, sprays a resin binder on the screen, and uses an electric iron to iron and heat it to cover the fragile paper cultural relics to make it stick to the paper. The Jiangsu Provincial Archives Bureau has improved this technology by changing one silk thread into two silk threads to achieve higher strength, durability and filming speed. [0003] However, the silk scr...

AI Technical Summary

Problems solved by technology

More importantly, the original polymerized monomers are difficult to remove, so some aldehydes will remain in the resin, but the amine groups in silk protein are very sensitive to these aldehydes, and heating will cause condensation reaction between the two. It not only increases the aging and deterioration of silk, but also deteriorates the performance of the resin binder and the bonding effect becomes poor (Zhang Qingzhi, The advantages and disadvantages of the archival wire mesh reinforcement method[J]. Archives Science Research, 1997, 1: 60-61)

To sum up, silk screen reinforcement technology has problems such as different types of silk screen and paper fibers, easy aging, easy reaction with binder, easy damage to paper by hot pressing, and low process efficiency. The more serious problem is that this method does not reversible

[0004] Patent CN103952948 discloses a method for reinforcing fragile paper with a cotton fiber screen, which is to weave a single cotton thread on a loom into a screen for reinforcement. Although it solves the same problem as that of cultural relic paper, if large quantities The processing efficiency of silk screen production still needs to be improved. Moreover, it seems that it is still difficult to use this technology to produce ultra-low quantitative screen. There is still room for improvement, and it is far less stable than self-adhesive wire mesh in the above aspects

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