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Food wrapper and manufacturing method thereof

A technology of food wrapping paper and production method, which is applied in the directions of wrapping paper, wrapping paper, packaging, etc., can solve the problems of difficult to solve environmental pollution, limited product application scope, low physical strength of paper, and achieves improvement of physical strength and expansion of fiber. Source of raw materials, effect of damage reduction

Active Publication Date: 2009-10-14
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because corn stalks are grass-like raw materials, the cooking agent in this method is ammonium sulfite, etc. The cooking time is long and the energy consumption is high. It is difficult to solve the environmental pollution problem in the pulping process, and the physical strength of the paper is also low, which limits the product quality. scope of application

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 70% of the masson pine and the rest are a variety of hardwood mixed wood fiber raw materials. After preparing the materials, use DDS displacement cooking, closed washing and sieving to make chemical natural wood pulp with a Kappa value of 46-56. The pulp is deoxidized by oxygen and alkali. After bleaching with lignin and hydrogen peroxide, the whiteness of the slurry is 22% (ISO), the slurry is adjusted to a concentration of 3.4%, the slurry is beaten to 26°SR, and the wet weight is 12g. The slurry is diluted and sand removed , control the online concentration of 0.2%, the online pH value: 6.5, through the pressure sieve fine sieve, with food grade rosin glue and aluminum sulfate seasoning, fourdrinier paper machine forming, pressing, drying, coiling, rewinding, packaging into finished products.

[0017] Oxygen delignification hydrogen peroxide bleaching process is oxygen delignification period of 60 minutes, pulp concentration 8%, temperature 80 ℃, oxygen pressure 1200K...

Embodiment 2

[0020] 85% of the masson pine and the rest are a variety of hardwood mixed wood fiber raw materials. After preparing the materials, use DDS displacement cooking, closed washing and sieving to make chemical natural wood pulp with a Kappa value of 50. The pulp is delignified by oxygen and alkali 1. After hydrogen peroxide bleaching, the whiteness of the slurry is at 28% (ISO). This slurry is adjusted to a concentration of 3.0%, the slurry is beaten to 29 ° SR, and the wet weight is 12.3g. After the slurry is diluted, the sand is removed. Control the online concentration of 0.22%, and the online pH value: 6.1. After being finely screened by pressure sieve, seasoned with food-grade rosin gum and aluminum sulfate, formed by fourdrinier paper machine, pressed, dried, coiled, rewinded, and packaged into finished products.

[0021] Oxygen delignification hydrogen peroxide chlorine-free bleaching process is oxygen delignification period time 80 minutes, pulp concentration 10%, temperatu...

Embodiment 3

[0024] After the masson pine wood fiber raw material is prepared, it is cooked by DDS displacement and closed washing and sieving to make chemical natural wood pulp with a kappa value of 35. After the pulp is subjected to oxygen-alkali delignification and hydrogen peroxide bleaching, the pulp whiteness is at 35% (ISO), the slurry is blended into a concentration of 3.6%, the slurry is beaten to 32 ° SR, and the wet weight is 13g. After the slurry is diluted, the sand is removed, and the online concentration is controlled at 0.2%. The online pH value: 6, after Pressure sieve and fine sieve, food-grade rosin glue and aluminum sulfate seasoning, fourdrinier paper machine forming, pressing, drying, coiling, rewinding, and packaging into finished products.

[0025] Oxygen delignification hydrogen peroxide chlorine-free bleaching process is oxygen delignification period of 90 minutes, pulp concentration 12%, temperature 100 ℃, oxygen pressure 1050Kpa, pH value 11.5, oxygen consumption...

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Abstract

The invention relates to a food wrapper and a manufacturing method thereof. Burst index of the food wrapper is not lower than 3kPa.m / g, longitudinal tensile strength thereof is not lower than 3.0KN / m, lead content thereof is not higher than 5.0mg / kg and arsenic content is not higher than 1.0mg / kg; decoloring testing proves negative; fluorescent matter is not contained; pathogen can not be detected; whiteness of the wrapper ranges from 20% to 30%; the wrapper is brown; the manufacturing method comprises the following steps: DDS displacement cooking, washing screen, oxygen delignification and hydrogen peroxide bleaching are carried out on wood fibrous material to be prepared into micro-bleach pulp with a whiteness of 22% to 36%; beating, desanding, flovoring, fine sizing by a pressurized screen, wiring and moulding, pressing, drying, reeling, rewinding and packaging are carried out on the pulp, thus obtaining the food wrapper.

Description

technical field [0001] The invention relates to a wrapping paper, which has high physical strength, brown color and meets the hygienic requirements of food wrapping paper. The invention also relates to the production method of the food wrapping paper, especially the technology of using needles and broadwood fiber raw materials to produce the food wrapping paper by DDS displacement cooking, oxygen delignification and hydrogen peroxide bleaching. The invention also relates to the application of the food wrapping paper. Background technique [0002] For a long time, a lot of plastic products have been used in food packaging. Because plastics are extremely difficult to degrade naturally, plastic waste is difficult to deal with, and a large amount of food is packaged in plastic, which is easy to cause waste of resources and environmental pollution. Plastic food bags are currently the main source of "white pollution". Therefore, developed countries have introduced laws and regula...

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): D21H27/10D21C3/22D21C9/16D21H11/00D21F5/00D21H21/16
Inventor 王福纪朱杰赵桂林桂来争刘便初李忠德朱忠颖刘伍渊
Owner YUEYANG FOREST & PAPER CO LTD
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