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Reinforcing fiber for making paper and preparing method thereof as well as paper product containing the same

A technology for reinforcing fiber and paper products, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, papermaking, textiles and papermaking, etc., which can solve the problems of limited chemical fiber application and performance, low fiber bonding strength of paper sheets, difficult fiber Uniform dispersion and other issues to achieve the effect of improving hydrophilicity and wettability, increasing strength, and enhancing binding force

Active Publication Date: 2011-06-29
BAODING BANKNOTE PAPER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of chemical fibers is generally smooth, with poor wettability to water and low surface activity, making it difficult to form an ideal bond between fibers.
When these chemical fibers are mixed with other fiber raw materials for papermaking, during the forming process, there are often disadvantages such as difficulty in uniform dispersion of fibers and low bonding strength between paper fibers, which greatly limits the application of chemical fibers in papermaking and performance

Method used

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  • Reinforcing fiber for making paper and preparing method thereof as well as paper product containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Based on the total mass of raw materials, 1.25wt.% of cationic polyacrylamide (molecular weight of 400,000-800,000), 3.75wt.% of low-molecular-weight strong cationic polymer quaternary ammonium salt Fx-706 (New East Asia Chemical Products Co., Ltd.) and 95wt.% of PVA (average degree of polymerization of 2200, alcoholysis degree of 99mol%) were sequentially added to water to make 15% of PVA modified spinning dope.

[0026] (2) Pass the PVA modified spinning dope obtained in (1) above through a spinneret with 10,000 circular spinnerets with a diameter of 70 μm, and press into sodium sulfate (30% solid content) as a coagulant In the coagulation bath (90℃), the fabricated fiber is wound with the first roller, and the tension between the metal plate of the spinneret and the first roller is controlled between 0.040-0.055N / dtex, and then 3 times Processes such as wet stretching, stretching heat treatment (drawing temperature 200°C), oiling, etc., are used to prepare reinforci...

Embodiment 2

[0030] (1) Based on the total mass of raw materials, 0.8% amphoteric polyacrylamide (molecular weight 600,000-800,000), 1.0% CMC (carboxymethyl cellulose, DS: 0.6-0.9) and 98.2% PVA (average degree of polymerization of 2200, alcoholysis degree of 99 mol%) was sequentially added to water to make 15% PVA modified spinning dope.

[0031] (2) The PVA modified spinning dope obtained in (1) above was spun according to the same method as described in step (2) in Example 1 and subjected to 4 times wet drawing and drawing heat treatment (drawing temperature 220 ℃), oiling and other processes to make reinforcing fibers for papermaking. The reinforced fiber for papermaking has a fineness of 1.95 dtex and a strength of 8.3 cN / dtex.

[0032] (3) The reinforcing fiber for papermaking obtained in (2) above was made into paper according to the same method as described in step (3) in Example 1.

[0033] (4) The strength index of the paper added with the reinforcing fiber for papermaking and the sam...

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Abstract

The present invention relates to a reinforced fiber used in papermaking, a preparation method thereof and a paper product containing the fiber. The present invention first provides the reinforced fiber used in papermaking, which is produced by the spinning of the following materials: 80wt percent to 99.95wt percent of polyvinyl alcohol and 0.05wt percent to 20wt percent of modifier; and wherein, the modifier contains one or more of polyamide type, cellulose type, polyamine type and quaternary ammonium salt type high-molecular polymers. The present invention also provides the preparation method of the reinforced fiber and the paper product containing the reinforced fibers. By adding the modifier into spinning stock solution, the obtained reinforced fiber can have more reactive active functional groups, and thereby, the hydrophilicity and wettability of the surface of the reinforced fiber can be enhanced. The reinforced fibers, which are uniformly mixed with paper pulp for papermaking, can notably improve all the intensity indexes of the produced paper product.

Description

Technical field [0001] The invention provides a paper-making reinforcing fiber that can significantly improve the strength of paper products, and also provides a method for preparing the fiber and paper products containing the fiber. The invention belongs to the technical field of pulping and papermaking. Background technique [0002] In the production of certain high-strength paper types, especially high-strength paper such as banknote paper and valued document paper, due to the limitations of the strength of the existing plant fiber raw materials, the strength of the paper can hardly be increased. improve. With the development of the textile industry and the continuous in-depth research on chemical fibers, more and more new varieties of chemical fibers have been developed, and chemical fibers have also been widely used in the papermaking industry to make special papers for various purposes. Some newly developed high-performance chemical fibers provide a broad application spac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/16D21H15/02
Inventor 曹秀痕朱西赏王存增刘义龙王进喜刘文琪吴梅竹
Owner BAODING BANKNOTE PAPER CO LTD
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