Thin natural color food wrapping paper and preparation method thereof

A technology of food wrapping paper and natural color, applied in the directions of wrapping paper, wrapping paper, pulp beating method, etc., can solve the problems of no thin food wrapping paper preparation method, reduced paper strength, increased power consumption, etc., to solve the problem of poor water filtration , The effect of reducing papermaking wastewater and cutting effect

Active Publication Date: 2015-03-25
SHANDONG TRALIN PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the high beating degree of pulp has the following problems: first, increasing the beating degree of straw pulp will lead to prolonged beating time, increased power consumption, and reduced production capacity; Squeeze rollers and sticky cylinders will cause paper sheets to break and increase paper defects, which directly affect the speed and productivity of the paper machine; thirdly, due

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The wheat straw raw material is steamed and boiled by a conventional method, and then squeezed, washed and decomposed. Pump the straw pulp with a concentration of 13% obtained after thawing to the oxygen delignification reaction tower for oxygen delignification treatment. Magnesium sulfate with a pulp volume of 5% is mixed with 4% lye in terms of sodium hydroxide for the absolute dry pulp volume, and steam is fed into the pipeline to add the slurry to raise the temperature. Afterwards, the pulp enters the oxygen delignification reaction tower after being fully mixed in the mixing chamber. The temperature at the inlet of the reaction tower is 90°C and the pressure is 1.1Mpa. The temperature is 105°C and the pressure is maintained at 0.2Mpa. After the treatment is completed, the pulp is sprayed into the pulp tank and diluted to obtain the unbleached straw pulp. The degree of beating of the unbleached straw pulp is 35°SR.

[0065] The unbleached wood pulp and the unblea...

Embodiment 2

[0078] The bagasse raw material is steamed and boiled by a conventional method, and then squeezed, washed and decomposed. Pump the straw pulp with a concentration of 8% obtained after thawing to the oxygen delignification reaction tower for oxygen delignification treatment. Magnesium sulfate with a pulp volume of 3% is mixed with 3% lye in terms of sodium hydroxide for the absolute dry pulp volume, and steam is introduced into the pipeline to add the slurry to raise the temperature. Afterwards, the pulp enters the oxygen delignification reaction tower after being fully mixed in the mixing chamber. The temperature at the inlet of the reaction tower is 95°C and the pressure is 0.9Mpa. The temperature is 100°C and the pressure is maintained at 0.4Mpa. After the treatment is completed, the pulp is sprayed into the pulp tank and diluted to obtain the unbleached straw pulp. The beating degree of the unbleached straw pulp is 36°SR.

[0079] The unbleached wood pulp and the unbleac...

Embodiment 3

[0093] The Arundis raw material is steamed and boiled by a conventional method, and then squeezed, washed and decomposed. Pump the straw pulp with a concentration of 13% obtained after thawing to the oxygen delignification reaction tower for oxygen delignification treatment. Magnesium sulfate with a pulp volume of 4% is mixed with 2% lye in terms of sodium hydroxide for the absolute dry pulp volume, and steam is introduced into the pipeline to add the slurry to heat up. Afterwards, the pulp enters the oxygen delignification reaction tower after being fully mixed in the mixing chamber. The temperature at the inlet of the reaction tower is 100°C and the pressure is 1.02Mpa. The temperature is 105°C and the pressure is maintained at 0.4Mpa. After the treatment is completed, the pulp is sprayed into the pulp tank and diluted to obtain the unbleached straw pulp. The degree of beating of the unbleached straw pulp is 35°SR.

[0094]The unbleached wood pulp and unbleached straw pul...

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Abstract

The invention relates to thin natural color food wrapping paper and a preparation method of the thin natural color food wrapping paper, belonging to the field of food wrapping paper in the papermaking industry. The thin natural color food wrapping paper is 18-55% in brightness and 16-25g/m<2> in ration; and the pulp for preparing the thin natural color food wrapping paper is prepared from 20-30% of wood pulp and 70-80% of unbleached straw pulp, preferentially, the pulp is prepared from 22-28% of wood pulp and 72-78% of unbleached straw pulp, and the beating degree of the unbleached straw pulp is 38-53 degrees SR; and an oil-proofing agent is added in the pulp for preparing the thin natural color food wrapping paper. According to the thin natural color food wrapping paper and the preparation method of the thin natural color food wrapping paper, the unbleached straw pulp with low beating degree is mainly adopted for papermaking, a technical prejudice that the straw pulp is required to have high beating degree for preparing the thin wrapping paper can be overcome, the prepared paper has high strength, is low in cost, is environment-friendly and does not contain toxic substances, and the preparation method can solve the problem that the straw pulp is difficult to be prepared into the thin natural color food wrapping paper.

Description

technical field [0001] The invention relates to a thin unbleached food wrapping paper, which belongs to the field of food wrapping paper in the papermaking industry, in particular to a thin unbleached food wrapping paper produced by using wood pulp and unbleached pulp and a preparation method thereof. Background technique [0002] Food wrapping paper is a paper packaging material for directly imported foods such as candies, popsicles, and pastries. Food packaging paper plays an irreplaceable role in protecting food, preventing food from being contaminated by external microorganisms or other substances, and preventing or reducing food oxidation and other reactions. Food packaging paper is indispensable to human life. With the rapid growth of the national economy and the continuous improvement of the quality of life, the field of food packaging paper in my country has developed rapidly. In order to make full use of natural resources and reduce the cost of postage and transpor...

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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IPC IPC(8): D21H27/10D21H11/12D21H21/14D21D1/02D21H17/28D21H21/08D21H17/17
Inventor 贾明昊李洪法宋明信邹俊波张宏才李天军王双龙
Owner SHANDONG TRALIN PAPER
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