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Preparation method of biopolymer-coated type oil-proof packaging paper

A biopolymer and packaging paper technology, applied in the directions of physical treatment of paper, addition of inorganic compounds, addition of material mixtures, etc., can solve the problems of high cost of oil-repellent paper, unfavorable production operations, and high viscosity of oil-repellent agent, and achieves low cost and easy to use. Production operations, the effect of reducing waste

Inactive Publication Date: 2017-02-01
袁振华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent with publication number CN102242533A provides a kind of preparation method of biopolymer coating type oil-proof wrapping paper, this patent prepares oil-proof agent with chitosan, acetic acid as main raw material, and wherein chitosan is expensive, causes this The cost of oil-proof paper is high, and the viscosity of chitosan and sodium alginate is high, which causes the viscosity of the prepared oil-proof agent to be too high, which is not conducive to actual production operation

Method used

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preparation example Construction

[0014] The present invention relates to a kind of preparation method of biopolymer coating type oil-proof wrapping paper, comprises the following steps:

[0015] Step 1: Preparation of anti-oil agent: sequentially add sodium alginate, soybean protein isolate and glycerin into a container filled with distilled water and stir evenly, then use 1mol / L sodium hydroxide or hydrochloric acid solution to adjust the pH value to 7-12 , and finally put the container in a high-temperature water bath at 95-100°C for 0.1h-0.4h with magnetic stirring to prepare the oil repellant, filter the prepared oil repellent to remove undissolved impurities; Degas until there are basically no bubbles on the surface of the oil repellent, and the vacuum degree is 0.06-0.09MPa; in the preparation of the oil repellent component, the mass fraction of sodium alginate is controlled at 10%-60%, and the mass fraction of soybean protein isolate The fraction is controlled at 10%-70%, and the mass fraction of glyce...

Embodiment 1

[0022] Step 1: Preparation of anti-oil agent: sequentially add sodium alginate, soybean protein isolate and glycerin into a container filled with distilled water and stir evenly, then use 1mol / L sodium hydroxide or hydrochloric acid solution to adjust the pH value to 12, and finally The container was placed in a constant temperature water bath at 95° C. and magnetically stirred for 0.1 h to prepare the oil repellant. In the formula of anti-oil agent, the mass fraction of sodium alginate is controlled at 10%, the mass fraction of soybean protein isolate is controlled at 10%, the mass fraction of glycerin is controlled at 20%, the prepared anti-oil agent is filtered, removed For the undissolved impurities, vacuum degas the prepared oil repellent until there are basically no bubbles on the surface of the oil repellant, and the vacuum degree is 0.09-0.1MPa;

[0023] Step 2: Prepare base paper, use discarded crop fruits as raw materials, recycle rotten fruits, or the surplus harves...

Embodiment 2

[0029]The difference between Example 2 and Example 1 is that in step 1, 1 mol / L sodium hydroxide or hydrochloric acid solution is used to adjust the pH value to 8, and the container is placed in a constant temperature water bath at 60° C. for 0.2 h to prepare the oil repellent. In the formula of anti-oil agent, the massfraction of sodium alginate is controlled at 20%, the massfraction of soybean protein isolate is controlled at 50%, and the massfraction of glycerin is controlled at 30%; In step 3, the coating of anti-oil agent The amount is 4g / m2; in step 4: put the greaseproof paper in a drying oven at a temperature of 90°C and dry for 150s.

[0030] According to the test standard TAPPI T 559cm-12 widely used in the oil-proof paper and paperboard industry, the oil-resistant grade of the prepared oil-proof packaging paper was measured, and the oil-resistant grade was measured to be 8.

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Abstract

The invention relates to a preparation method of biopolymer-coated type oil-proof packaging paper. The preparation method comprises the steps of preparing an oil-proofing agent, preparing raw paper, coating, drying, treating under the conditions of constant temperature and constant humidity, and the like. In a formula of the oil-proofing agent, the mass percent of sodium alginate is controlled to be 10-60%, the mass percent of soybean isolate protein is controlled to be 10-70%, and the mass percent of the glycerol is controlled to be 5-60%. The oil-proof packaging paper prepared by the method can meet the demand of oil prevention in daily production and life, and has the oil-proof grade of 7-12. Furthermore, the oil-proof packaging paper also has the advantages of being low in cost, environmental-friendly, non-toxic to a human body, easy for actual production operation, and the like.

Description

technical field [0001] The invention relates to the field of the food industry, in particular to a method for preparing a natural oil-proof and degradable biopolymer-coated oil-proof wrapping paper. Background technique [0002] In the field of oil-proof paper preparation technology, the method of improving the beating degree of pulp was first adopted. However, with the increase of beating degree, the tear strength and burst strength of paper will decrease. Not only that, the increase in beating degree will also lead to a sharp increase in power consumption, and make the pulp's water filtration and papermaking performance worse, and it is easy to have dehydration difficulties in the wire and press parts, resulting in poor surface smoothness after drying, resulting in Paper sickness. Therefore, it is not an economical and reasonable method to prepare greaseproof paper only by increasing the degree of beating. [0003] Greaseproof paper can be prepared by compounding a cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21C5/00D21H17/68D21H11/04D21H17/28D21F13/02D21H21/14D21H25/06D21H19/12
CPCD21H11/12D21C5/00D21F13/02D21H11/04D21H17/28D21H17/68D21H17/74D21H19/12D21H21/14D21H25/06
Inventor 袁艳君林炜生
Owner 袁振华
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