Antibacterial coating material for paper products

A technology for coating materials and paper products, applied in the direction of paper coating, coating, paper, etc., can solve the problems of reduced strength, limited application of paper materials, poor barrier properties, etc., to improve strength and toughness, and inhibit bacteria from invading items in packaging paper , the effect of reducing water permeability

Active Publication Date: 2016-09-21
CANGNAN BAOFENG PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most important packaging materials are paper and plastic, but paper has hygroscopicity and porosity, and its strength will decrease after being exposed to moisture, and its barrier property is poor.
These shortcomings limit the application of paper materials in some food packaging and barrier packaging

Method used

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  • Antibacterial coating material for paper products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: SiO x Preparation of carboxymethyl chitosan solution: under stirring at 30°C, add 1 mol / L sodium silicate solution dropwise to 10 mL of 3 mol / L hydrochloric acid solution until pH=4, stop stirring, and age for 2 h to obtain Acidic silica sol; adding 5g of carboxymethyl chitosan powder into 500mL of 1% tartaric acid solution by mass percentage to obtain a carboxymethyl chitosan solution with a mass volume concentration of 10g / L, stirring until completely dissolved to obtain carboxymethyl chitosan base chitosan solution; add 0.1g sodium caseinate to carboxymethyl chitosan solution and stir well, after it dissolves, add 30mL acidic silica sol under stirring condition, after mixing evenly, ultrasonic degassing 5min, get SiO x / carboxymethyl chitosan solution;

[0021] Step 2: Preparation of modified polylactic acid particles: Weigh 5g of polylactic acid particles and dissolve them in 100mL of acetonitrile to obtain a solution with a concentration of 0.05g / mL, add...

Embodiment 2

[0024] Step 1: SiO x Preparation of carboxymethyl chitosan solution: under stirring at 40°C, add 0.5 mol / L sodium silicate solution dropwise to 10 mL of 2 mol / L hydrochloric acid solution until pH = 4, stop stirring, and age for 3 h. Obtain acidic silica sol; add 10g carboxymethyl chitosan powder into 500mL of mass percentage in the tartaric acid solution of 2%, obtain the carboxymethyl chitosan solution that mass volume concentration is 20g / L, stir until dissolving completely, obtain carboxymethyl chitosan solution Methyl chitosan solution; add 0.2g sodium caseinate to carboxymethyl chitosan solution and stir well, after it dissolves, add 40mL acidic silica sol under stirring condition, after mixing evenly, ultrasonic Gas for 5-10min to get SiO x / carboxymethyl chitosan solution;

[0025]Step 2: Preparation of modified polylactic acid particles: Weigh 5g of polylactic acid particles and dissolve them in 100mL of acetonitrile to obtain a solution with a concentration of 0.0...

Embodiment 3

[0028] Step 1: SiO x Preparation of carboxymethyl chitosan solution: under stirring at 40°C, add 2 mol / L sodium silicate solution dropwise to 10 mL of 2 mol / L hydrochloric acid solution until pH=5, stop stirring, and age for 2 h to obtain Acidic silica sol; 7.5g carboxymethyl chitosan powder is added into 500mL mass percent as 2% citric acid solution to obtain a mass volume concentration of carboxymethyl chitosan solution of 15g / L, stirred until fully dissolved, to obtain Carboxymethyl chitosan solution; add 0.1g sodium hexametaphosphate to the carboxymethyl chitosan solution, stir and mix well, after it dissolves, add 50mL acidic silica sol under stirring condition, after mixing evenly, ultrasonic Degas for 8 minutes to get SiO x / carboxymethyl chitosan solution;

[0029] Step 2: Preparation of modified polylactic acid particles: Weigh 6g of polylactic acid particles and dissolve them in 100mL of acetone to obtain a solution with a concentration of 0.06g / mL, add 3g of PVP,...

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Abstract

The invention discloses an antibacterial coating material for paper products. The good toughness and high barrier property to water vapor of carboxymethyl chitosan are utilized for enhancing waterproofness of a coating. SiOx is utilized for carrying out molecular modification on carboxymethyl chitosan, the permeable rate of the coating is further reduced, the toughness of the coating is improved, then a SiOx/carboxymethyl chitosan solution serves as an adhesive of the coating and is mixed with polylactic acid with high grease preventing performance to form a co-mixed coating, therefore, the defects that a polylactic acid material is low in strength, high in brittleness, poor in waterproofness and the like are overcome, and the barrier property of the coating to oxygen is enhanced. The porosity of halloysite is utilized for dipping in plant essential oil, the plant essential oil can be slowly released, and it is guaranteed that the volatilization amount is within a proper range. The obtained antibacterial coating material is used for coating the paper products, therefore, the water vapor, oxygen and grease preventing performance of the paper products can be enhanced, and invasion of bacteria into objects in packaging paper can be inhibited.

Description

technical field [0001] The present invention relates to an antibacterial coating material, more specifically relates to a coating material used for paper products to enhance the water and oil repellency of the paper products while having antibacterial effect. Background technique [0002] Packaging materials generally need to have good mechanical properties, barrier properties, recyclability or biodegradability. At present, the most important packaging materials are paper and plastic, but paper has hygroscopicity and porosity, and its strength will decrease after being exposed to moisture, and its barrier property is poor. These shortcomings limit the application of paper materials in some food packaging and barrier packaging. The water blocking performance of wrapping paper is not good, and dry products will absorb moisture in the environment and cause loss of brittleness, while vegetables and fruits lose moisture and cause shriveling and shrinkage, and frozen or refrigera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/14D21H19/28D21H19/20D21H21/16D21H21/18D21H21/36D21H21/38
CPCD21H19/14D21H19/20D21H19/28D21H21/16D21H21/18D21H21/36D21H21/38
Inventor 林福亮
Owner CANGNAN BAOFENG PRINTING
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