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Waterproof paper bag coating and preparation method thereof

A coating and paper bag technology, applied in the field of waterproof paper bag coating and its preparation, can solve the problems of restricted promotion and use, rupture of paper food bags, and the concept of not conforming to environmental protection.

Active Publication Date: 2016-10-05
TONGLING FOUNDER PLASTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plastic food bags have excellent mechanical properties, anti-corrosion and waterproof characteristics, but plastic food bags are difficult to decompose, and they do not meet the current concept of environmental protection; and paper food bags fully meet the requirements of environmental protection due to their excellent degradability , so it can be widely used
[0003] Although paper food bags have excellent degradability, the mechanical properties of food bags are poorer than those of plastic food bags, especially the waterproof performance, which leads to the cracking and water damage of paper food bags during use occurrence, which greatly limits further promotion and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The invention provides a kind of preparation method of waterproof paper bag coating, comprising:

[0014] 1) gelatinizing dilute sulfuric acid and starch to make starch solution;

[0015] 2) steaming the starch solution to obtain a paste;

[0016] 3) Glycerin, salicylic acid, ethanol, rosin, film-forming aids, lignocellulose, nano palladium, silicon latex, magnesium oxide, surfactant and paste are mixed to prepare waterproof paper bag coating.

[0017] In step 1), the specific amount of each substance can be selected in a wide range, but for the gelatinization of starch in dilute sulfuric acid more quickly, preferably, relative to the starch of 100 parts by weight, the amount of dilute sulfuric acid is 2- 4 parts by weight. Wherein, the specific concentration of the dilute sulfuric acid can be selected within a wide range, but in order to further optimize the gelatinization effect, more preferably, the concentration of the sulfuric acid in the dilute sulfuric acid is ...

Embodiment 1

[0028] 1) At 25° C., gelatinize dilute sulfuric acid (containing 4% by weight of sulfuric acid) and starch for 40 minutes to prepare a starch solution; wherein the weight ratio of dilute sulfuric acid to starch is 100:3.

[0029] 2) Cooking the starch solution for 3 hours at 75°C to prepare a paste;

[0030] 3) At 25°C, mix the above paste, glycerin, salicylic acid, ethanol, rosin, propylene glycol butyl ether, lignocellulose, nano-palladium (20nm particle size), silica latex, magnesium oxide and dodecyl Sodium benzenesulfonate (the weight ratio of each substance is 100:3:4:1:0.8:2.5:1.2:0.06:1.5:1.7:6) was mixed for 30 minutes to prepare waterproof paper bag coating A1.

Embodiment 2

[0032] 1) At 15° C., gelatinize dilute sulfuric acid (containing 2% by weight of sulfuric acid) and starch for 30 minutes to prepare a starch solution; wherein the weight ratio of dilute sulfuric acid to starch is 100:2.

[0033] 2) Cook the starch solution for 2 hours at 70°C to prepare a paste;

[0034] 3) At 15°C, mix the above paste, glycerin, salicylic acid, ethanol, rosin, propylene glycol methyl ether acetate, lignocellulose, nano palladium (particle size is 10nm), silicon latex, magnesium oxide and stearin salt (the weight ratio of each substance is 100:1:2:0.5:0.5:1.5:0.7:0.05:0.8:1.5:4) mixed for 20 minutes to prepare waterproof paper bag coating A2.

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Abstract

The invention discloses waterproof paper bag paint and a preparation method thereof. The preparation method includes 1), gelatinizing dilute sulphuric acid and starch to obtain a starch solution; 2), steaming the starch solution to obtain paste; 3), mixing the paste with glycerinum, salicylic acid, ethanol, rosin, film formation agent, lignocellulose, nano-palladium, silicon latex, magnesium oxide and surfactant to obtain the waterproof paper bag paint. The waterproof paper bag paint prepared by the method can be adhered to the surface of a paper bag stably, and accordingly, mechanical performance, especially water proofing performance, of the paper bag is improved.

Description

technical field [0001] The invention relates to coatings, in particular to a waterproof paper bag coating and a preparation method thereof. Background technique [0002] Food bags are bags used to hold food, which are divided in terms of materials, including paper food bags and plastic food bags. Plastic food bags have excellent mechanical properties, anti-corrosion and waterproof characteristics, but plastic food bags are difficult to decompose, and they do not meet the current concept of environmental protection; and paper food bags fully meet the requirements of environmental protection due to their excellent degradability , so it can be widely used. [0003] Although paper food bags have excellent degradability, the mechanical properties of food bags are poorer than those of plastic food bags, especially the waterproof performance, which leads to the cracking and water damage of paper food bags during use The occurrence of the disease greatly limits further promotion a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
Inventor 陈可夏陈可亮
Owner TONGLING FOUNDER PLASTICS TECH