Method of making paper by machinery

A machine manufacturing and paper technology, applied in paper, papermaking, textiles and papermaking, etc., can solve the problems of reducing pulp whiteness, inability to effectively remove metal ions, and limit material selection, etc., to achieve the effect of increasing the degree of yellowing

Inactive Publication Date: 2018-11-13
安徽古耐家居有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, the catalytic decomposition of metal ions in the existing papermaking process to hydrogen peroxide and hypochlorous acid bleaching agents affects the bleaching effect, and such as Fe 3+ The ions react with the phenolic groups in the pulp to form a deep-colored compound, which will reduce the whiteness of the pulp and increase the degree of yellowing of the pulp. Scaling of system equipment and pipelines, these metal ions cannot be effecti

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for machine-made paper in this embodiment includes a pulping process, a modulation process, a papermaking process, and a post-processing process. The pulping process is divided into two steps: plant fiber raw material pulping and bleaching. The modulation process is divided into two steps: For the three steps of loose pulp, beating and sizing and filling, in this embodiment, other processes adopt a method similar to that of existing machine-made paper, the difference is:

[0046] After the plant fiber raw material pulping step and before the bleaching step, component A was added, stirred at a stirring speed of 170 r / min at a temperature of 34°C for 7 minutes, and then left to stand for 30 minutes to proceed to the next step;

[0047]Add component B before the sizing step in the preparation process, stir at a stirring speed of 10r / min for 50 minutes at a temperature of 28°C and transfer to the next step;

[0048] The component A includes the following raw materi...

Embodiment 2

[0064] A method for machine-made paper in this embodiment includes a pulping process, a modulation process, a papermaking process, and a post-processing process. The pulping process is divided into two steps: plant fiber raw material pulping and bleaching. The modulation process is divided into two steps: For the three steps of loose pulp, beating and sizing and filling, in this embodiment, other processes adopt a method similar to that of existing machine-made paper, the difference is:

[0065] Add component A after the plant fiber raw material pulping step and before the bleaching step, stir at a temperature of 36°C at a stirring speed of 180r / min for 9 minutes, then let stand for 34 minutes and transfer to the next step;

[0066] Add component B before the sizing step in the preparation process, stir for 70 minutes at a stirring speed of 14r / min at a temperature of 30°C and transfer to the next step;

[0067] The component A includes the following raw materials in parts by ...

Embodiment 3

[0083] A method for machine-made paper in this embodiment includes a pulping process, a modulation process, a papermaking process, and a post-processing process. The pulping process is divided into two steps: plant fiber raw material pulping and bleaching. The modulation process is divided into two steps: For the three steps of loose pulp, beating and sizing and filling, in this embodiment, other processes adopt a method similar to that of existing machine-made paper, the difference is:

[0084] After the plant fiber raw material pulping step and before the bleaching step, component A was added, stirred at a stirring speed of 175 r / min for 8 minutes at a temperature of 35° C., and then left to stand for 32 minutes and transferred to the next step;

[0085] Add component B before the sizing step in the preparation process, and stir for 60 minutes at a stirring speed of 12r / min at a temperature of 29°C and transfer to the next step;

[0086] The component A includes the followin...

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Abstract

The invention relates to the technical field of papermaking, in particular to a method of making paper by machinery, comprising the steps of adding component A, which is composed of diethylene triaminepentaacetic acid, sodium dodecyl sulfate and modified chitosan, after the step of pulping of plant fiber materials and before the step of bleaching; adding component B, which is composed of vegetablemulti-gum, pyrethrin, additive plant extracts and modified dialdehyde starch, before the step of applying gum during preparation. The method has the advantages that influence of metal ions upon pulpbleaching can be relieved effectively, fibers gain good swelling, and paper is easier to dry; grain issue can be relieved, and paper strength is improved; the ability of paper sheets to resist permeation of hydrated liquids is improved, and the paper sheets are given good antibacterial and insect-preventing effects; the components added herein are nontoxic and harmless, and therefore, the paper isgood in safety and environmental friendliness and has high practical value and good application prospect.

Description

technical field [0001] The invention relates to the technical field of modern papermaking, in particular to a method for machine-made paper. Background technique [0002] Papermaking is an important invention of the working people in ancient China. There are two forms of mechanism and manual. The mechanism is carried out continuously on the paper machine. The pulp suitable for paper quality is diluted with water to a certain concentration, and is initially dehydrated in the wire part of the paper machine to form a wet paper sheet, which is then dehydrated by pressing, and then dried into paper. [0003] On the one hand, because handmade paper is beaten manually, the fibers in the pulp are well preserved and the fibers of handmade paper can be arranged in various directions evenly; machine-made paper is beaten by machines, and the pulp fibers are broken. The longitudinal and horizontal distribution of fibers is uneven. For example, during wet mechanical papermaking, the fib...

Claims

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Application Information

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IPC IPC(8): D21C9/00D21C9/10D21H21/14D21H21/16D21H21/36D21H21/10D21H17/24D21H17/09D21H17/07D21H17/28D21H17/02
CPCD21C9/00D21C9/1036D21H17/02D21H17/07D21H17/09D21H17/24D21H17/28D21H21/10D21H21/14D21H21/16D21H21/36
Inventor 袁东
Owner 安徽古耐家居有限公司
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