Natural color food wrapping paper and preparation method thereof

Abstract

The invention relates to natural color food wrapping paper and in particular relates to natural color food wrapping paper prepared by main raw materials including unbleached straw pulp and wood pulp and a preparation method of the natural color food wrapping paper. The ration of the natural color food wrapping paper is 25-52g / m<2>, the pulp is prepared from 15-35% of wood pulp and 65-85% of unbleached straw pulp, preferentially, the pulp is prepared from 20-30% of wood pulp and 70-80% of unbleached straw pulp, the beating degree of the wood pulp is 45-70 degrees SR (Schopper-Riegler), and the beating degree of the unbleached straw pulp is 50-60 degrees SR. No toxic chemical substances can be generated in a papermaking process of the food wrapping paper; the wood pulp with low beating degree and the straw pulp with low beating degree are combined to be subjected to papermaking, wood pulp fibers are swelled up and fibrillated to a certain degree due to low beating degree, the beaten straw pulp has strong plasticity and can be fully mixed with the wood pulp fibers, therefore, the food wrapping paper meeting the standards can be made.

Description

technical field [0001] The invention relates to a food wrapping paper, in particular to an unbleached food wrapping paper prepared by using unbleached straw pulp and wood pulp as main raw materials and a preparation method thereof. Background technique [0002] With the improvement of social living standards and economic levels, there are more and more types of food packaging materials. Among them, as an important part of food packaging materials, food packaging paper occupies an important position in the entire food packaging industry, but how to develop packaging paper technology, how to improve the quality of food packaging paper and reduce the cost of food packaging paper is the key to the production and processing of food packaging Important considerations for paper. [0003] Traditional food packaging paper uses plastic as packaging material, which has rich sources of raw materials, low cost, and excellent performance. However, plastic packaging materials are extremel...

AI Technical Summary

Problems solved by technology

[0011] In addition, in the above preparation methods, the oil-proof paper is made from wood pulp with higher beating degree and straw pulp with higher beating degree, and higher beating degree requires The long running time of the equipment increases the production cost, especially for straw pulp, after the beating degree reaches a certain level, it will take longer to increase the beating degree

At the same time, the higher beating degree also has the following problems: first, the higher beating degree causes too much cutting of cellulose, and the wood pulp papermaking of shorter cellulose will affect the mechanical strength of food packaging paper, especially the tearing Second, it will lead to poor drainage of straw pulp during the papermaking process, sticking to press rolls and drying cylinders, causing paper sheet breakage and increased paper defects, which directly affect the speed and productivity of the paper machine

At present, no oil-proof paper prepared by mixing wood pulp with a lower degree of beating and straw pulp has been found, and no method for preparing oil-proof paper prepared by using wood pulp with a lower degree of beating and straw pulp with a lower degree of beating has been found.