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Natural plant-based regenerated cellulose coated paper for food packaging as well as preparation method and application thereof

A technology for regenerated cellulose and food packaging, applied in wrapping paper, wrapping paper, packaging, etc., can solve the problems of insufficient physical properties, poor waterproof and oil-proof performance, etc., and achieve improved physical properties, improved ink absorption performance, and good waterproof performance Effect

Active Publication Date: 2021-03-26
GUANGDONG DONGGUAN QUALITY SUPERVISION TESTING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the problems of poor water and oil repellency and insufficient physical properties in the prior art regenerated cellulose film and coated paper containing regenerated cellulose, the object of the present invention is to provide a natural plant-based regenerated product for food packaging. Cellulose Coated Paper

Method used

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  • Natural plant-based regenerated cellulose coated paper for food packaging as well as preparation method and application thereof
  • Natural plant-based regenerated cellulose coated paper for food packaging as well as preparation method and application thereof
  • Natural plant-based regenerated cellulose coated paper for food packaging as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method for natural plant-based regenerated cellulose coated paper for food packaging, comprising the following steps:

[0050] S1. Dissolving pulp: After dissolving the prehydrolyzed sulfate dissolving pulp of coniferous wood with a beating degree of 55 ° SR and a lignin content of less than 0.2%, the mass concentration of sodium hydroxide solution is 8%, and the pulp concentration is 7%. Alkaline hydrolysis treatment at 110°C for 40 minutes and then washing to neutrality to obtain a dissolving pulp with an α-cellulose content of 96% and a degree of polymerization of 1100;

[0051] S2. Regenerated cellulose: take dissolving pulp with α cellulose content of 95% and degree of polymerization of 1100, mix and dissolve it with N-methylmorpholine-N-oxide aqueous solution with a concentration of 88-90%, and wash with water Finally, the regenerated cellulose suspension was obtained; the ratio of the dissolving slurry to the N-methylmorpholine-N-oxide aqueous solut...

Embodiment 2～3

[0057] The preparation steps of the natural plant-based regenerated cellulose coated paper used for food packaging in Examples 2 to 3 are the same as in Example 1, except for the following process conditions, see Table 1 for details, and the prepared coated paper is correlated performance testing.

[0058] Table 1

[0059] Example 2 Example 3 Beating degree°SR 50 60 Alpha cellulose content 96％ 94％ Polymerization 1000 1200 Concentration of NMMO aqueous solution 88％ 90％ Dissolving slurry: NMMO aqueous solution 14g:86L 15g:85L Reactor process 108℃，3h 105℃，4h Mass ratio of citrate starch to regenerated cellulose in S2 62:38 67:33 Amounts of glycerol and citric acid in S2 10％ 15％ One side sizing amount in S2 g / m 2

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Abstract

The invention belongs to the technical field of food packaging, and discloses natural plant-based regenerated cellulose coated paper for food packaging as well as a preparation method and applicationthereof. The preparation method comprises the following steps: S1, regenerated cellulose: mixing and dissolving dissolving pulp and an N-methylmorpholine-N-oxide aqueous solution, and washing with water to obtain regenerated cellulose turbid liquid; S2, primary double-sided sizing: dissolving and gelatinizing citrate starch, regenerated cellulose and the like, then carrying out double-sided sizingon paper, and carrying out secondary sizing after drying; and S3, secondary sizing: carrying out dissolving gelatinization and single-side sizing on citrate starch, regenerated cellulose and the like, drying, and carrying out calendaring to obtain the finished product coated paper. The coated paper has good waterproof performance, oil-proof performance, physical performance and the like, and canbe widely applied to the field of food packaging.

Description

technical field [0001] The invention belongs to the technical field of food packaging, and in particular relates to a natural plant-based regenerated cellulose coated paper for food packaging, a preparation method and application thereof. Background technique [0002] Food packaging paper is often coated (PE, PP, PET, etc.) to improve its waterproof and oil-proof performance to meet its functional requirements for contacting water-based and oily foods. However, the environmental and safety issues caused by synthetic fibers (plastic polymers) produced from petroleum have become increasingly prominent. With the further tightening of plastic restrictions, it is imminent to find safer, suitable and environmentally friendly alternative materials. [0003] Patent CN102234956A discloses the process of coating polyolefin emulsion on the base paper and coating the surface to prepare coated paper. This process eliminates the use of traditional extruders. The process is relatively simp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H19/84D21H19/10D21H21/16D21H17/25D21H17/28D21H17/06D21H17/15D21H21/14
CPCD21H27/10D21H19/84D21H19/10D21H21/16D21H17/25D21H17/28D21H17/06D21H17/15D21H21/14
Inventor 陈春霞余伟梅赖毅东赵俭徐梅英
Owner GUANGDONG DONGGUAN QUALITY SUPERVISION TESTING CENT