Method for producing environment-friendly and high-resistance food wrapping paper

A technology for food packaging paper and a production method, applied in the field of pulp and paper making, can solve the problems that cannot be used in the production of paper or cardboard, plant fibers cannot be effectively separated, and the efficient reuse of plant fibers is affected, and the product structure is beneficial. Effects of adjustments and upgrades, easy recycling, convenient production methods

Active Publication Date: 2016-05-25
CHINA NAT PULP & PAPER RES INST CO LTD
View PDF4 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when such packaging materials are recycled in pulp and paper mills, a large number of components cannot be used in the production of paper or cardboard: such as high molecular polyethylene and 5% aluminum foil accounting for 20% of the total weight of packaging materials; at the same time, During the waste paper treatment process, the polyethylene film and metal layer are broken into a large number of small fragments, which brings a heavy burden to the slag and sand removal of the pulp. Since these impurities are not remov

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The raw material composition of base paper is: 55 parts of bleached hardwood pulp, 40 parts of bleached softwood pulp, 5 parts of chemical mechanical pulp, 1.2% of sizing agent, 1.0% of wet strength agent, 0.5% of retention and drainage aid, and papermaking according to the conventional method The papermaking process is carried out, and the weight of the finished paper is 160g / m 2 .

[0021] Dissolve polyvinyl alcohol with a degree of polymerization of 2200 and a degree of alcoholysis of 92% to a solution with a solid content of 6.0%, apply it on the base paper with a metering rod, and dry it with hot air for 30 seconds at a drying temperature of 160°C. The basis weight of the film after drying was 1.7 g / m2.

[0022] A coat of paint is applied over the dried polyvinyl alcohol film layer. The solid content of the paint is 14.5%; the kaolin content is 50%, the polyvinyl alcohol content is 49%, and other raw materials contain 1%. The average particle size of kaolin is 6...

Embodiment 2

[0026] The raw material of base paper consists of: 55 parts of bleached hardwood pulp, 40 parts of bleached softwood pulp, 5 parts of chemical mechanical pulp, 1.2% of sizing agent, 1.0% of wet strength agent, 0.5% of retention and drainage agent (both for fiber raw material Gross weight); in the primer, 100 parts of calcium carbonate, 12 parts of latex, 0.5 parts of thickener, 0.6 parts of water repellent, 0.4 parts of lubricant, 0.1 part of defoamer, and the coating amount of primer is 15g / m 2 ;In the surface coating, 70 parts of calcium carbonate, 30 parts of kaolin, 12 parts of latex, 0.3 parts of thickener, 0.5 parts of water-resistant agent, 0.3 parts of lubricant, 0.1 part of defoamer, and the coating amount of the top coating is 11g / m 2 . Base paper weight is 225g / m 2 .

[0027] Dissolve polyvinyl alcohol with a degree of polymerization of 2400 and an alcoholysis degree of 88% to a solution with a solid content of 5.0%, apply it on the base paper by press sizing, and...

Embodiment 3

[0032] The raw material composition of base paper is the same as example 1, quantitatively is 90g / m 2 .

[0033] Dissolve polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 88% into a solution with a solid content of 11.1%, add 0.5% phosphoric acid to the mass of polyvinyl alcohol in the solution, and apply it on the base paper by means of metering rod sizing , hot air drying for 120s at a drying temperature of 140°C. The basis weight of the film after drying was 2.7 g / m2.

[0034] The solid content of the intermediate coating is 20%; the content of kaolin is 35%, the content of polyvinyl alcohol is 59%, the content of modified starch is 5%, and the content of other raw materials is 1%. The average particle size of kaolin is 2.785 μm, and the diameter-to-thickness ratio is 96; the average particle size of modified starch is 0.952 μm, and the grade of polyvinyl alcohol is 1799. First pre-disperse the kaolin, dissolve the polyvinyl alcoho...

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
Login to view more

PUM

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of pulping and papermaking, in particular to a method for producing environment-friendly and high-resistance food wrapping paper. The method comprises the following steps: a layer of polyvinyl alcohol solution is applied to the surface of base paper; a layer of coating formed by constituents including polyvinyl alcohol, kaolin, modified starch, phosphoric acid and the like is applied after the layer of polyvinyl alcohol solution is dry; a layer of polyacrylic acid solution is applied eventually. The high-resistance food wrapping paper produced with the method has good water, oil and steam permeation prevention functions, and is efficiently and easily recovered by a paper mill, the yield of good pulp is larger than 85% after treatment such as pulping, pulp grinding, fluffing and the like, and good economic benefits and environmental benefits are achieved.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and in particular relates to a production method of environment-friendly high-barrier food wrapping paper. Background technique [0002] High-barrier packaging materials are widely used in the field of food packaging, such as milk, soybean milk, fruit juice, tea drinks and other liquid food and beverages, instant noodles, instant rice noodles and other convenience foods, melon seeds, peanuts, popcorn and other snacks. The packaging of these foods needs to have Packaging material with high barrier properties. High-barrier packaging materials have the function of reducing or preventing moisture, oil, water vapor, oxygen and other substances from penetrating into the packaging, and can effectively block the impact of external environmental factors on the quality of internal food, thereby ensuring that the food maintains good quality and taste during the shelf life . [0003] A common high-ba...

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
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): D21H27/10D21H27/18D21H19/60D21H19/40D21H19/54D21H19/48
CPCD21H19/40D21H19/48D21H19/54D21H19/60D21H27/10D21H27/18
Inventor 杜艳芬刘金刚王加福王比松苏艳群胡云李洪才
Owner CHINA NAT PULP & PAPER RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap