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Production method of oil-proof food wrap paper

A food wrapping paper, oil-proof technology, applied in the directions of wrapping paper, wrapping paper, packaging, etc., can solve the problems of being difficult to biodegrade, not belonging to the development scope of green chemistry and circular economy, etc., to improve the uniform performance of finished paper, improve the The effect of tightness and improving paper strength

Active Publication Date: 2017-02-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the oil repellent agent on paper products is the best oil repellant of fluorine lipid, which has excellent oil repellent performance, but because it is a high molecular polymer, it is difficult to biodegrade, and it does not belong to green chemistry and circular economy. Development category

Method used

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Examples

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Effect test

preparation example Construction

[0026] A kind of preparation method of oil-proof food wrapping paper of the present invention, comprises the following steps:

[0027] Polylactic acid fiber modification treatment: prepare polylactic acid fiber into an aqueous solution with a mass percentage of 10%-20%, heat to adjust pH; then add sodium alginate and microcrystalline cellulose, and stir after ultrasonic to obtain polylactic acid fiber solution;

[0028] Specifically, take polylactic acid fiber, sodium alginate and microcrystalline cellulose with a mass ratio of 100:1-2:1, and prepare polylactic acid fiber, sodium alginate and microcrystalline cellulose with a mass percentage of 10%- 20%, 10%-20% and 0.5%-2.0% aqueous solutions, heat the polylactic acid fiber solution to 40°C-80°C, adjust the pH to 5.0-8.0, add sodium alginate aqueous solution and microcrystalline cellulose aqueous solution, Stir after ultrasonic treatment to obtain polylactic acid fiber solution.

[0029] During the ultrasonic treatment, the ...

Embodiment 1

[0041] A preparation method of oil-proof food packaging paper, comprising the following steps:

[0042] Polylactic acid fiber modification treatment: first, add water to the polylactic acid fiber to make a 12% solution, heat it to 45°C, adjust the pH to 5.5, add 16% sodium alginate and 0.8% microcrystalline cellulose and stir for 40 minutes, The output power is that the output frequency is 40kHz ultrasonic treatment for 8min, and stirring at a speed of 12000rpm in the mixer for 25min to prepare a polylactic acid fiber solution;

[0043] Among them, the mass ratio of polylactic acid fiber, sodium alginate and microcrystalline cellulose is 100:1:1.

[0044] In this embodiment, the sodium alginate has a dispersibility index average number (Mn) / average weight (Mw) coefficient of 1.3.

[0045] The degree of polymerization of microcrystalline cellulose used in this example was 150.

[0046] Pulp treatment: Add 0.03% xylanase for 40 minutes at 35°C to fully chlorine-free bleached con...

Embodiment 2

[0054] A preparation method for oil-proof food packaging paper, comprising the following steps:

[0055] Polylactic acid fiber modification treatment: first, add water to the polylactic acid fiber to form a 16% solution, heat it to 60°C, adjust the pH to 6.0, add 16% sodium alginate and 1% microcrystalline cellulose and stir for 60 minutes, Treat in an ultrasonic wave with an output power of 60kHz for 6min, and stir for 20min at a speed of 15000rpm in a mixer to prepare a polylactic acid fiber solution;

[0056] In the above steps, the mass ratio of polylactic acid fiber, sodium alginate and microcrystalline cellulose is 100:1.5:1.

[0057] In this example, the selected sodium alginate has a dispersibility index average number (Mn) / average weight (Mw) coefficient of 1.6.

[0058] The degree of polymerization of microcrystalline cellulose used in this example was 180.

[0059] Pulp treatment: the total chlorine-free bleached softwood pulp and the chlorine-free bleached bamboo...

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Abstract

The invention discloses a production method of oil-proof food wrap paper. The production method includes the steps of subjecting polylactic acid fibers to modified treatment; preparing modified polylactic acid fibers into an aqueous solution, heating and regulating a pH value; adding sodium alginate and microcrystalline cellulose for ultrasonic treatment prior to stirring so as to obtain a polylactic acid fiber solution; adding xylanase into pulp and beating so as to obtain mixed pulp; conducting papermaking, namely diluting the polylactic acid fiber solution obtained from modified treatment of the polylactic acid fibers, adding the diluted polylactic acid fiber solution into the diluted mixed pulp with mixing evenly, adding chitosan, microfibrillated cellulose and silica sol and conducting dewatering pressing so as to obtain a wet paper web; preparing a carboxymethyl chitosan solution and a cationic guar gum solution, mixing the two solutions, and subjecting the wet paper web to surface sizing in the papermaking step so as to obtain the oil-proof food wrap paper. The oil-proof food wrap paper produced from a natural polymer assistant is simple in production method, safe and nonhazardous, and has excellent oil-proof performance and high surface strength.

Description

technical field [0001] The invention belongs to the technical field of special paper preparation, and in particular relates to a preparation method of oil-proof food wrapping paper. Background technique [0002] The main purpose of food packaging is to ensure the hygienic quality, quality and flavor of food as a commodity during storage, transportation and consumption. In addition to meeting the performance of packaging paper, oil-proof food packaging paper also requires anti-oil absorption and penetration, and is hygienic, sterile, and free of polluting impurities. It is a special paper with high added value. [0003] Therefore, the development of paper for packaging food that is oil-resistant and meets the safety requirements of food packaging can meet the safety and hygiene requirements of food packaging, improve the safety level of food packaging, and have high economic and social benefits. [0004] At present, the oil repellent agent on paper products is the best oil r...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H17/00D21H13/30D21H17/24D21H19/14D21H21/16D21H17/63D06M15/03D06M15/05
CPCD06M15/03D06M15/05D06M2101/32D21H13/30D21H17/005D21H17/24D21H17/63D21H19/14D21H21/16D21H27/10
Inventor 李佩燚侯青青林春涛李新平张蒙
Owner SHAANXI UNIV OF SCI & TECH
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