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Production of stretched paper bag

A production method and paper bag technology, which are applied in pulp beating methods, papermaking, packaging paper and other directions, can solve problems such as equipment corrosion, environmental pollution, and increase production costs, and achieve the effect of saving softwood fiber raw materials

Inactive Publication Date: 2007-11-21
YONGZHOU XIANGJIANG PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The scheme of patent application No. 99117390 needs to add bleaching agent in production, which causes corrosion to equipment and pollutes the environment; the scheme of patent application No. 97115819 needs to add dyes in production, which pollutes the environment in production. These two schemes improve In addition, through the research of the present inventors, it is found that when using the production scheme of stretchable paper sack paper specifically disclosed in the above-mentioned literature examples, the quality of the paper produced may not be able to obtain high physical strength stretchable paper sack paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The production method of embodiment 1 is as follows:

[0012] Use masson pine wood pulp to prepare a slurry with a concentration of 3.5%, beat the slurry to 26°SR, and have a wet weight of 15g. After the slurry is diluted, remove sand, add papermaking white water, appropriate amount of aluminum sulfate and sizing agent, and control the online concentration. 0.3%, online PH value: 6.2, through pressure sieve and fine sieve, fourdrinier paper machine forming, pressing, front drying to 33% moisture content of paper, and compression by extensibility device, control the surface temperature of extensibility cylinder to 120°C, The compression ratio of the extensibility cylinder is 7.9%, and the paper sheets are dried to a moisture content of 9% after entering, and then coiled, rewinded, and packed.

[0013] After testing, the obtained stretchable bag paper has a quantitative value of 80g / m 2 , Tear index 10mN·m 2 / g, elongation 6.5%, air permeability 3.5μm / Pa·s, longitudinal...

Embodiment 2

[0014] The production method of embodiment 2 is as follows:

[0015] Use 70% masson pine kraft wood pulp, 20% various hardwood kraft wood pulp, and 10% waste paper pulp according to the dry weight ratio to prepare a pulp concentration of 4%, and beat the pulp to 28 ° SR , Wet weight: 10g, the slurry is diluted and desanded, after adding papermaking white water and an appropriate amount of aluminum sulfate and sizing agent, control the concentration of 0.2% on the net, the pH value of the net: 5.5, through the pressure sieve fine sieve, fourdrinier paper machine forming , pressing, and drying at the front until the moisture content of the paper is 34%, then compressed by the stretching device, the surface temperature of the stretching cylinder is controlled at 118°C, the compression ratio of the stretching cylinder is 7.5%, and the paper is dried to a moisture content of 8% after entering. Then it is made by coiling, rewinding and packaging.

[0016] After testing, the obtaine...

Embodiment 3

[0017] The production method of embodiment 3 is as follows:

[0018] According to the dry weight ratio, use 80% masson pine kraft wood pulp, 15% various hardwood kraft wood pulp, and 5% waste paper pulp to prepare a pulp concentration of 3.8%, and beat the pulp to 26 ° SR , Wet weight 12g, after the slurry is diluted and desanded, after adding papermaking white water and an appropriate amount of aluminum sulfate and sizing agent, control the online concentration of 0.3%, the online pH value: 6.1, pass through the pressure sieve fine screen, fourdrinier paper machine forming , pressing, and drying at the front until the moisture content of the paper sheet is 35%, then compressed by the stretching device, the surface temperature of the stretching cylinder is controlled at 119°C, the compression ratio of the stretching cylinder is 7.9%, and the paper sheet is dried to a moisture content of 8% after entering. Then it is made by coiling, rewinding and packaging.

[0019] After tes...

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Abstract

A production method of the extension paper is made by the paper pulp from the matching pulp, beating, sand removing, material adjusting, screening by pressurized screen, formed on meshwork, pressing, drying, rolling, rewinding and packing. The character is in that: it uses the masson pine sulfate wood pulp with absolute drying mass ratio of 70-100%, multiple broad-leaved sulfate wood pulp within 20%, the waste wood pulp within 10%, 3.5%-4.0% beating concentration, 25-28degree SR, 10-15g of wet weight, 0.2-0.4% mesh concentration and pH 5.5-7.5. In drying process, the paper page is compressed by the extending device. The paper produced in the invention can meet the extending bag paper technology and has the low cost, can be made from multiple fiber material.

Description

Technical field: [0001] The invention relates to a production method of paper, in particular to a production method of stretchable paper for sacks. Background technique: [0002] In the packaging process of bagged cement, paper bag paper is needed. Because the breaking resistance, tearing and tensile strength of stretch paper bag paper are better than ordinary paper bag paper, the cement bag made with three layers is better than the four layers of ordinary paper bag paper. The breakage rate of cement bags is still low, and low weight paper can be used, which is conducive to saving resource consumption. Modern cement plants, in order to improve bagging efficiency, all adopt mechanized multi-spout bagging, and the bagging speed is greatly improved. This requires that the cement bag must have sufficient tensile strength, burst resistance and energy absorption strength. It is difficult for ordinary paper bag paper to meet this requirement. The faster the bagging speed, the grea...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H11/02D21D1/02D21F5/00
Inventor 王福纪朱杰赵桂林张勇唐军平
Owner YONGZHOU XIANGJIANG PAPER CO LTD
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