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Method for producing carbon-free and thermosensitive body paper by using large proportion of chemithermomechanical pulp

A chemical-mechanical pulp, large-scale technology, used in chemical and mechanical pulp mixtures, papermaking, paper machines, etc. Thick performance, reduce production cost, ensure delicate effect

Inactive Publication Date: 2013-01-16
HENAN JIANGHE PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country is also a country with serious shortage of wood fiber resources, and the production level of chemical wood pulp has not been well developed, resulting in low quality of chemical pulp in my country. Therefore, if you want to produce high-grade carbonless copy base paper and thermal base paper, you must use Commercial wood pulp imported from abroad

Method used

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  • Method for producing carbon-free and thermosensitive body paper by using large proportion of chemithermomechanical pulp

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Experimental program
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Effect test

Embodiment 1

[0011] Embodiment 1: A method of producing carbon-free and heat-sensitive base paper using chemical-mechanical pulp in a large proportion, including sizing, headbox pulping, wire dehydration, press dehydration, pre-drying, coating, post-drying, calendering, In the coiling process, the raw materials used in the sizing process are chemical-mechanical pulp and chemical pulp in a ratio of 5-7:3-5. The chemical-mechanical pulp and chemical pulp in the sizing process are respectively sent to the headbox for the pulping process. In the box, the headbox in the headbox pulping process is a three-layer headbox. The chemical pulp in the sizing process is evenly distributed to the upper and lower pulp distribution systems of the headbox, and the chemical pulp flow is sent to the headbox. The middle-layer pulp distribution system, the three-layer pulp coming out of the headbox is dehydrated through the wire dehydration process, and the wire dehydration process adopts the wire part formed by...

Embodiment 2

[0012] Embodiment 2: The chemical-mechanical pulp and the chemical pulp are flowed to the three-layer headbox 4 through the sizing system according to the ratio of 7:3, wherein the chemical pulp is evenly distributed to the upper layer 3 and the lower layer 2 of the headbox in the slurry distribution system, The chemical-mechanical pulp flow is sent to the middle layer 1 of the headbox. The production of base paper is completed through sandwich forming 5 dehydration, press dehydration, pre-drying, coating, post-drying, calendering, coiling, etc. Carbon-free, heat-sensitive base paper produced according to the above-mentioned method, with a basis weight of 40g / m 2 , Thickness 0.056mm, moisture 7%, smoothness 75.2s / 68.5s, tensile index 78.4 / 34.8, tearing degree 248mN / 268mN, opacity 75%.

[0013] According to the actual needs of production, the proportion of chemical pulp and chemical mechanical pulp can be adjusted, but the proportion of chemical pulp in the proportion of pulp ...

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Abstract

The invention discloses a method for producing a carbon-free and thermosensitive body paper by using large proportion of chemithermomechanical pulp, comprising the working procedures such as sizing, discharging pulp by a pulp flowing box, dewatering by a mesh part, dewatering in a squeezing way, previously drying, coating, carrying out post drying, carrying out press polish, and reeling. The raw materials used by the sizing working procedure are chemithermomechanical pulp and chemical pulp according to the proportion of (6-7.5):(3-3.5), enabling the chemithermomechanical pulp and the chemical pulp subjected to the sizing working procedure to be respectively flowed and transported to different parts of a pulp discharge working procedure of the pulp flowing box, the pulp flowing box in the pulp flowing box sizing working procedure is a three-layer pulp flowing box, the chemical pulp of the sizing working procedure is evenly distributed into an upper-layer pulp distribution system and a lower-layer pulp distribution system of the pulp flowing box, the chemithermomechanical pulp flows to a middle-layer pulp distribution system of the pulp flowing box, and the three-layer pulp flowing out of the pulp flowing box is dewatered by the mesh part. According to the method, not only can the fineness and the smoothness of the surface of a finished paper be guaranteed, but also the paper can not be faded and aged after being stored for a long term.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a method for producing carbon-free and heat-sensitive raw paper by using a large proportion of chemical-mechanical pulp. Background technique [0002] Carbon-free paper and heat-sensitive paper are high-grade cultural papers, which have very strict requirements on paper quality. Therefore, the requirements for carbon-free base paper and heat-sensitive base paper are also very high during deep processing. Not only is the base paper required to have qualified physical indicators, delicate appearance, and good printing performance, but it must also be able to be stored for a long time. Because the mechanical pulp has a lot of non-cellulose components, the paper produced by paper is easy to be exposed to light, which will change the color of the paper and make the paper web brittle, which is not conducive to long-term preservation. Moreover, when the chemical-mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/10D21F1/00
Inventor 姜丰伟刘铸红曾云朱平王军清任红锐张家利邓智莉胡年喜王文辉盛海鹏
Owner HENAN JIANGHE PAPER
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