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Preparation method of pure wood pulp natural color paper for daily use

A technology of household paper and natural color, which is applied in papermaking, papermaking machines, textiles and papermaking, etc., can solve the problems of large chemical consumption, high energy consumption, and large environmental pollution, and achieve stable product quality, good quality and performance, and reduce Effects of Environmental Pollution

Active Publication Date: 2018-06-29
YUNNAN YUNJING FORESTRY & PULP MILL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current domestic production of wheat straw pulp and bamboo pulp is mainly based on batch cooking, bleaching with chlorine or hypochlorite, without oxygen delignification, which requires a large amount of chemicals, high energy consumption, and serious environmental pollution.

Method used

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  • Preparation method of pure wood pulp natural color paper for daily use
  • Preparation method of pure wood pulp natural color paper for daily use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Slurry preparation

[0029] 1) Preparation of natural color coniferous pulp

[0030] The raw material of natural color coniferous pulp is Simao pine with 14-20 years of age. After peeling, the shaving specifications are controlled according to the length of 15-35mm (the growth direction of wood chips), the thickness ≤ 7mm, and the width ≥ 5mm (horizontal direction of wood chips);

[0031] Sulfuric acid cooking: 28% alkali, 27.4% sulfide, 165°C cooking temperature, 4h cooking time; oxygen delignification: 2.2-2.5% alkali, 18-21kg / admt oxygen, 94 -98°C, time 90min, to obtain natural softwood pulp with a brightness of 28.1%;

[0032] 2) Preparation of natural color hardwood pulp

[0033] The raw material of the natural color hardwood pulp is eucalyptus with a width of 4-6 years. After peeling, the shaving specifications are controlled according to the length 15-35mm (the growth direction of the wood chip fiber), the thickness ≤ 7mm, and the width ≥ 5mm (the horizonta...

Embodiment 2

[0049] Same as Example 1, only the hardwood pulp is replaced by non-wood fiber raw materials.

Embodiment 3

[0051] (1) Slurry preparation

[0052] 1) Preparation of natural color coniferous pulp

[0053] The raw material of natural color coniferous pulp is Simao pine with 14-20 years of age. After peeling, the shaving specifications are controlled according to the length of 15-35mm (the growth direction of wood chips), the thickness ≤ 7mm, and the width ≥ 5mm (horizontal direction of wood chips);

[0054] Sulfuric acid cooking: 25% alkali, 26% sulfide, 170°C cooking temperature, 4h cooking time; oxygen delignification: 2.2-2.5% alkali, 18-21kg / admt oxygen, 90°C -95°C, time 90min, to obtain natural softwood pulp with a brightness of 32%;

[0055] 2) Preparation of natural color hardwood pulp

[0056] The raw material of the natural color hardwood pulp is eucalyptus with a width of 4-6 years. After peeling, the shaving specifications are controlled according to the length 15-35mm (the growth direction of the wood chip fiber), the thickness ≤ 7mm, and the width ≥ 5mm (the horizontal ...

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Abstract

The invention discloses a preparation method of a pure wood pulp natural color paper for daily use. The method includes steps of pulping through a sulfate method, and acquiring natural color needle pulp and natural color broad-leaf pulp through dual-section oxygen delignification; grinding the natural color needle pulp and the natural color broad-leaf pulp to respectively obtain needle pulp and broad-leaf pulp; then mixing at ratio and grinding to obtain mixed pulp; shaping and screening pulp through a monolayer flow box and a crescent shaper; squeezing and dewatering in a shoe form; performing high-temperature drying and sterilization; performing dry-method wrinkling to obtain a nature colored health raw paper with fine texture and soft quality. The preparation method saves resource and reduces environment pollution. The prepared pure wood pulp natural color paper for daily use is good in quality performance, stable in product quality; the dust is greatly reduced, the production technique is optimized, matured and advanced; moreover, the papermaking process is environment-friendly. Compared with a straw pulp natural color paper and a bamboo pulp natural color paper, the pure woodpulp natural color paper is better in gloss, high in intensity, softer in paper quality, and can be widely applied to paper processing for family use and various outside healthy use.

Description

technical field [0001] The invention relates to a wood pulping and papermaking method, in particular to a preparation method for producing household paper from uncolored pure wood pulp. Background technique [0002] Natural tissue paper is a newly developed household paper product in recent years, and has a good momentum of development in the market. However, the main raw materials of natural-color household paper sold in the market are non-wood fiber raw materials such as wheat straw and bamboo, and there are no enterprises that use wood fiber to produce natural-color household paper. In Shandong and Ningxia, wheat straw is mainly used as raw material, and in Sichuan and other places, bamboo is mainly used as raw material. In southern Yunnan, Jinggu, Zhenyuan, Ninger and other places, there are a large number of resources such as Simao pine and broad-leaved wood. Compared with masson pine, slash pine and moso bamboo in other regions, the raw material characteristics are qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F11/00
CPCD21F11/00
Inventor 杨亚辉饶明友段经奎祝应学李崇斌孙廷聪李永福李学芬
Owner YUNNAN YUNJING FORESTRY & PULP MILL
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