Grinding process for natural-color bamboo pulp

A technology of natural-color bamboo pulp and pulp refining, applied in the field of papermaking, can solve problems such as easy breakage, difficult separation of long fiber components, and the influence of bamboo pulp performance on paper-making performance, etc., to achieve improved water filtration capacity, The effect of excellent paper quality

Inactive Publication Date: 2018-05-04
SICHUAN HUANLONG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent only considers that the long-fiber components are difficult to separate into filaments, while the cell walls of the fine-fiber components are easy to break, and the characteristics of water absorption and swelling are obvious, and the influence of the hardness of bamboo itself on the properties of bamboo pulp and paper-forming properties is not considered.

Method used

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  • Grinding process for natural-color bamboo pulp
  • Grinding process for natural-color bamboo pulp
  • Grinding process for natural-color bamboo pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of a, 30 ° natural color bamboo pulp:

[0033] Softening: Put the moso bamboo slices prepared by wet method and 5% sodium hydroxide cooking liquid into the horizontal tube presoaker, put steam into the presoaker for heating, heat the steam to 70°C, and keep it warm for 60min; , the weight ratio of bamboo and cooking liquid is 1:3;

[0034] Kneading: Extrude and knead the softened bamboo fiber through a single-screw dipping and kneading machine. The single-screw dipping and kneading machine includes a prepreg, an extrusion kneading zone, a material and liquid mixing zone, and a cooking tube. The time for extruding and rubbing is 1min, and the compression ratio is 1:2; the filtrate after extruding and rubbing is recycled to cooking after removing impurities through a filter;

[0035] Mixing: Pour 5% sodium hydroxide cooking liquid preheated to 70°C into the material and liquid mixing area of ​​the dipping and kneading machine, mix for 30 seconds by spiral...

Embodiment 2

[0049] The preparation of a, 30 ° natural color bamboo pulp:

[0050] Softening: Put the moso bamboo slices prepared by wet method and 5% sodium hydroxide cooking liquid into the horizontal tube presoaker, put steam into the presoaker for heating, heat the steam to 70°C, and keep it warm for 60min; , the weight ratio of bamboo and cooking liquid is 1:3;

[0051] Kneading: Extrude and knead the softened bamboo fiber through a single-screw dipping and kneading machine. The single-screw dipping and kneading machine includes a prepreg, an extrusion kneading zone, a material and liquid mixing zone, and a cooking tube. The time for extruding and rubbing is 1min, and the compression ratio is 1:2; the filtrate after extruding and rubbing is recycled to cooking after removing impurities through a filter;

[0052] Mixing: Pour 5% sodium hydroxide cooking liquid preheated to 70°C into the material and liquid mixing area of ​​the dipping and kneading machine, mix for 30 seconds by spiral...

Embodiment 3

[0067] The preparation of a, 30 ° natural color bamboo pulp:

[0068] Softening: Put the moso bamboo slices prepared by wet method and 5% sodium hydroxide cooking liquid into the horizontal tube presoaker, put steam into the presoaker for heating, heat the steam to 70°C, and keep it warm for 60min; , the weight ratio of bamboo and cooking liquid is 1:3;

[0069] Kneading: Extrude and knead the softened bamboo fiber through a single-screw dipping and kneading machine. The single-screw dipping and kneading machine includes a prepreg, an extrusion kneading zone, a material and liquid mixing zone, and a cooking tube. The time for extruding and kneading is 1 min, and the compression ratio is 1:2; the filtrate after squeezing and kneading is passed through a filter to remove impurities and then recycled to cooking;

[0070] Mixing: Pour 5% sodium hydroxide cooking liquid preheated to 70°C into the material and liquid mixing area of ​​the dipping and kneading machine, mix for 30 sec...

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Abstract

The invention belongs to the technical field of papermaking and particularly relates to a grinding process for natural-color bamboo pulp. The grinding process for the natural-color bamboo pulp comprises the following steps: a, preparation of 30-degree natural-color bamboo pulp; b, preparation of 26-degree natural-color bamboo pulp; c, bamboo pulp mixing: mixing the 30-degree bamboo pulp and the 26-degree bamboo pulp in a weight ratio being (1.5-2.5):(7.5-8.5) to obtain mixed bamboo pulp; d, bamboo pulp dilution: diluting the mixed bamboo pulp with plain boiled water until the mass concentration reaches 3%-7% to obtain diluted pulp; e, pulp grinding: grinding the diluted pulp to obtain the natural-color bamboo pulp. According to the grinding process for the natural-color bamboo pulp, the pulp with different hardness is mixed in a certain ratio, the pulp is ground by selecting a proper beating degree, the finally obtained pulp has enhanced drainage capacity and is suitable for making paper by a paper machine, and the obtained paper has excellent performance.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a refining process of natural-color bamboo pulp. Background technique [0002] China's bamboo forest area can reach more than 4 million hectares if the alpine bamboo species are added, ranking first in the world. Bamboo is characterized by fast growth, strong reproductive ability, high yield, easy renewal, wide adaptability, and multiple uses. Once afforestation is successful, it can grow into bamboos every year and benefit for a long time. Bamboo has long fibers, appropriate fiber aspect ratio, and low lignin content. If it is treated with appropriate methods, it can replace wood pulp to produce paper with good quality and high added value. [0003] During the refining process of bamboo pulp, the long-fiber component of high-hardness natural bamboo pulp is difficult to separate due to the complex structure of the cell wall, while the cell wall of the fine fiber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C1/06D21C7/00D21D1/30
CPCD21C1/06D21C7/00D21D1/30
Inventor 周骏李云川范武毅张雪萍刘建兵帅云洪胡勇
Owner SICHUAN HUANLONG NEW MATERIAL
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