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Method for producing high-permeability sack kraft paper by utilizing bamboo pulp

A paper bag, high-permeability technology, applied in the direction of paper, papermaking, packaging paper, etc., can solve the problems of reducing the performance of paper bag paper, such as tensile strength and energy absorption, and achieve low bag breakage rate, high physical strength, and enhanced exhaust performance. Effect

Active Publication Date: 2019-03-08
FUJIAN QINGSHAN PAPER INDUSTRY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for producing high-stretch paper bag paper using bamboo pulp, so as to solve the problem that the existing cement bag manufacturers punch holes in the paper bag paper. Although the venting performance of the cement bag is enhanced, the air loss of the paper bag is also reduced. Practical technical issues on the performance of paper such as tensile strength and energy absorption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for producing high-permeability sack kraft paper by utilizing bamboo pulp
  • Method for producing high-permeability sack kraft paper by utilizing bamboo pulp

Examples

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Effect test

example 1

[0019] A method of utilizing bamboo pulp to produce high-stretch paper sack paper, specifically as follows:

[0020] Using 15% of bamboo chips and 85% of coniferous wood chips to obtain pulp by kraft method to make extensible paper sack paper.

[0021] After the bamboo chips and coniferous wood chips are mixed evenly in proportion, they are sent to the 110m 3 The vertical cooking pot, before cooking, add cooking white liquor (NaOH lye and washing liquid after pulp washing) according to the ratio of additives (bamboo chips and coniferous wood chips) to water weight ratio of 1:3.6, the amount of alkali used 20%, vulcanization degree 32%, mixed with bamboo and wood mixed chips, of which bamboo and wood mixed chips account for 48% of water, and the total liquid is 62m 3 ;Add steam gradually to the set temperature in the cooking pot, the temperature change process and time include: the temperature is raised from 70°C to 120°C by adding the amount of steam, and the time used is 60m...

example 2

[0024] A method of utilizing bamboo pulp to produce high-stretch paper sack paper, specifically as follows:

[0025] Using 20% ​​of bamboo chips and 80% of coniferous wood chips to obtain pulp by kraft method to make extensible paper sack paper.

[0026] After the bamboo chips and coniferous wood chips are mixed evenly in proportion, they are sent to the 110m 3 The vertical cooking pot, before cooking, add cooking white liquor (NaOH lye and washing liquid after pulp washing) according to the ratio of additives (bamboo chips and coniferous wood chips) to water weight ratio of 1:3.6, the amount of alkali used 17%, vulcanization degree 34%, mixed with bamboo and wood mixed chips, of which bamboo and wood mixed chips account for 46% of moisture, and the total liquid is 64m 3 ;Add steam gradually to the set temperature in the cooking pot, the temperature change process and time include: the temperature is raised from 70°C to 120°C by adding the amount of steam, and the time used i...

example 3

[0029] A method of utilizing bamboo pulp to produce high-stretch paper sack paper, specifically as follows:

[0030] Using 25% of bamboo chips and 75% of coniferous wood chips to obtain pulp by kraft method to make extensible paper sack paper.

[0031] After the bamboo chips and coniferous wood chips are mixed evenly in proportion, they are sent to the 110m 3 The vertical cooking pot, before cooking, add cooking white liquor (NaOH lye and washing liquid after pulp washing) according to the ratio of additives (bamboo chips and coniferous wood chips) to water weight ratio of 1:3.6, the amount of alkali used 21%, vulcanization degree 29%, mixed with bamboo and wood mixed chips, of which bamboo and wood mixed chips account for 44% of water, and the total liquid is 66m 3 ;Add steam gradually to the set temperature in the cooking pot, the temperature change process and time include: the temperature is raised from 70°C to 120°C by adding the amount of steam, and the time used is 60m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a method for producing high-permeability sack kraft paper by utilizing bamboo pulp. The sack kraft paper is prepared by steps of thickening by a pulp vacuum thickener, high consistency refining, low-consistency disk refining, flow grit removal, pulp screening by a pressurized screen, net molding on a floating flow box, four-roller three-pressure-zone pressing, drying, coiling, recoiling and packing. The method specifically comprises the following steps: mixing bamboo chips and needle wood chips, pulping by adopting a sulfate process, washing and screening the obtained pulp, performing high-consistency pulping to maintain the fiber length, performing low-consistency pulping, adding auxiliary materials, screening the pulp by the pressurized screen, loading on a net, molding on the net, performing four-roller three-pressure-zone pressing, drying by a drying part, and treating by a tensile device, thereby obtaining the sack kraft paper. By utilizing the method disclosed by the invention, the tensile sack kraft paper with low cost, high physical strength and high permeability can be produced.

Description

【Technical field】 [0001] The invention relates to a paper production method, in particular to a method for producing high-penetration paper bag paper by using bamboo pulp. 【Background technique】 [0002] Paper bag paper is used in the packaging process of bagged cement, because the air permeability of high air permeability paper bag paper is better than that of ordinary paper bag paper. With the development of industry, in order to improve production efficiency, modern cement plants often use fast filling equipment, which requires that the cement bag must have sufficient tensile strength, energy absorption performance and stronger air permeability. During the rapid filling process, a large amount of air enters the cement bag. If the air is not discharged quickly, the cement bag will be broken by impact. Cement bag manufacturers perforate the paper bag paper to enhance the venting performance of the cement bag, but also reduce the tensile and energy absorption properties of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H15/10D21H11/12D21H11/04D21H21/06D21H21/10D21H21/18D21H21/16D21H17/28D21H17/66D21H17/37D21H17/17D21H21/14D21F11/02
CPCD21F11/02D21H11/04D21H11/12D21H15/10D21H17/17D21H17/28D21H17/37D21H17/66D21H21/06D21H21/10D21H21/14D21H21/16D21H21/18D21H27/10
Inventor 李素娟陈绍虬谢玉辉程书杏
Owner FUJIAN QINGSHAN PAPER INDUSTRY CO LTD
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