Preparation method of water-resistant adhesive for processing corrugated paperboard

A corrugated cardboard and adhesive technology, applied in the directions of adhesives, adhesive types, adhesive additives, etc., can solve the problems of useless cardboard, decreased adhesive performance, and inability to meet the cardboard, and achieves reduction of dosage, enhancement of filling performance, and improvement of The effect of adhesive properties

Inactive Publication Date: 2018-08-17
江兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When corrugated cardboard is exposed to rain or water, the bonding performance between the layers of the paper is likely to decline, and the paper layers of the cardboard become easy to peel off, which makes the cardboard unable to meet the packaging requirements of the product or even makes the cardboard scrapped and useless

Method used

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  • Preparation method of water-resistant adhesive for processing corrugated paperboard

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Modification of polyglutamic acid: add water to 50g food grade polyglutamic acid at 25°C to form a saturated solution, add 50% dilute sulfuric acid dropwise to adjust the pH value of the solution to 4-5, then add 15g N-methylol Diacetone acrylamide, add water to completely dissolve N-methylol acrylamide, heat to 70-80°C and keep stirring to react. After the esterification reaction, add 10g diacetone acrylamide and 0.5g potassium persulfate, add water to make the Acetone acrylamide and potassium persulfate are completely dissolved, and then heated to a reflux state with heat preservation and stirring for reaction. After the polymerization reaction is completed, the heating is stopped, and the obtained mixture is concentrated under reduced pressure to make a paste with a solid content of 75-85%. The paste is naturally cooled to After room temperature, it is sent to a freeze dryer, and the solid obtained by drying is made into a fine powder by an ultrafine pulverizer to...

Embodiment 2

[0031] (1) Modification of polyglutamic acid: Add water to 60g food grade polyglutamic acid at 25°C to form a saturated solution, add 50% dilute sulfuric acid dropwise to adjust the pH value of the solution to 4-5, then add 20g N-methylol Diacetone acrylamide, add water to completely dissolve N-methylol acrylamide, heat to 70-80°C and keep stirring to react. After the esterification reaction, add 10g diacetone acrylamide and 0.5g potassium persulfate, add water to make the Acetone acrylamide and potassium persulfate are completely dissolved, and then heated to a reflux state with heat preservation and stirring for reaction. After the polymerization reaction is completed, the heating is stopped, and the obtained mixture is concentrated under reduced pressure to make a paste with a solid content of 75-85%. The paste is naturally cooled to After room temperature, it is sent to a freeze dryer, and the solid obtained by drying is made into a fine powder by an ultrafine pulverizer to...

Embodiment 3

[0035] (1) Modification of polyglutamic acid: Add water to 60g food grade polyglutamic acid at 25°C to form a saturated solution, add 50% dilute sulfuric acid dropwise to adjust the pH value of the solution to 4-5, then add 20g N-methylol Diacetone acrylamide, add water to completely dissolve N-methylol acrylamide, heat to 70-80°C and keep stirring to react. After the esterification reaction, add 10g diacetone acrylamide and 0.5g potassium persulfate, add water to make the Acetone acrylamide and potassium persulfate are completely dissolved, and then heated to a reflux state with heat preservation and stirring for reaction. After the polymerization reaction is completed, the heating is stopped, and the obtained mixture is concentrated under reduced pressure to make a paste with a solid content of 75-85%. The paste is naturally cooled to After room temperature, it is sent to a freeze dryer, and the solid obtained by drying is made into a fine powder by an ultrafine pulverizer to...

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Abstract

The invention discloses a preparation method of a water-resistant adhesive for processing a corrugated paperboard, and relates to the technical field of adhesives. The preparation method includes thesteps: (1) polyglutamic acid modification; (2) filler preparation; (3) adhesive preparation. In the modification process of polyglutamic acid, double bonds are introduced to a polyglutamic acid structure by esterification reaction of N-hydroxymethyl acrylamide and the polyglutamic acid, acrylamide copolymers are introduced to the polyglutamic acid structure by polymerization reaction of the N-hydroxymethyl acrylamide and diacetone acrylamide, the adhesive performance of the polyglutamic acid is enhanced, and the water resistance of the adhesive is improved by adding adhesive auxiliaries and modifying 4A molecular sieve activation powder.

Description

Technical field: [0001] The invention relates to the technical field of adhesives, in particular to a method for preparing a water-resistant adhesive for corrugated cardboard processing. Background technique: [0002] Corrugated cardboard, also known as corrugated cardboard. It is made of at least one layer of corrugated paper and a layer of cardboard (also called cardboard), which has good elasticity and extensibility. It is mainly used to make cartons, the sandwich of cartons and other packaging materials for fragile goods. It is made of raw cardboard similar to yellow cardboard by beating with domestic straw pulp and waste paper, and then machined to make it into a corrugated shape, and then the surface is bonded with boxboard paper with an adhesive such as sodium silicate. [0003] At present, packaging boxes made of corrugated cardboard can basically meet the mechanical performance requirements of commodity packaging, but the most common problem faced during use is wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/08C09J11/04C09J11/08C08F283/04C08F220/58C08G69/48
CPCC09J151/08C08F283/045C08G69/48C08K2003/2227C08K2003/2296C08K2201/011C09J11/04C09J11/08C08L3/08C08K13/06C08K9/04C08K9/08C08K7/26C08K3/34C08K3/22C08K7/10
Inventor 江兵
Owner 江兵
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