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A kind of hydroxypropyl chitosan composite film material and preparation method thereof

A hydroxypropyl chitosan and composite film technology, applied in the field of film materials, can solve the problems of reducing the internal product quality of the film material, increasing the weight of the film material, poor sealing, etc., to prevent water vapor from passing through the composite film material, reducing the quality effect

Active Publication Date: 2016-06-22
SHANTOU HONGQIAO PACKAGING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problems to be solved: conventional composite film materials have poor sealing performance and high water vapor permeability, which will increase water vapor transmission during use and reduce the quality of products inside the film material. In addition, conventional The hygroscopicity of the film material is strong. After long-term contact with moisture, the weight of the film material will increase greatly, which will have a great impact on the stability of the film material. Therefore, a hydroxypropyl chitosan composite film is needed Materials and methods of preparation

Method used

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  • A kind of hydroxypropyl chitosan composite film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Take 12 parts of hydroxypropyl chitosan with a molecular weight of 200,000, 19 parts of polylactic acid with a molecular weight of 700,000, 8 parts of ethyl cellulose, and 4 parts of 2-hexenyl succinic anhydride by weight. Sugar, polylactic acid, ethyl cellulose, 2-hexenyl succinic anhydride are stirred uniformly at a temperature of 90°C, the stirring time is 2h, and the speed of the stirring paddle is 150rpm; then the temperature is raised to 95°C and then polyvinyl chloride is added 7 parts, 8 parts of polypropylene, 3 parts of diisodecyl phthalate, stir again evenly, the stirring time is 60min, the speed of the stirring blade is 50rpm, it is a film material mixture;

[0037] (2) Use a twin-screw extruder to extrude the film material mixture uniformly stirred in step (1). The temperature of the extrusion process is 183~190℃ in the first zone, and the temperature in the second zone is 195~204℃, the temperature of the third zone is 208~215℃;

[0038] (3) After the twin-...

Embodiment 2

[0041] (1) Take 14 parts of hydroxypropyl chitosan with a molecular weight of 500,000, 17 parts of polylactic acid with a molecular weight of 800,000, 16 parts of ethyl cellulose, 4 parts of 2-hexenyl succinic anhydride by weight, and polymerize the chitosan Sugar, polylactic acid, ethyl cellulose, 2-hexenyl succinic anhydride are stirred uniformly at a temperature of 90°C, the stirring time is 2h, and the speed of the stirring paddle is 150rpm; then the temperature is raised to 95°C and then polyvinyl chloride is added 9 parts, 12 parts of polypropylene, 4 parts of diisodecyl phthalate, stir again evenly, the stirring time is 60min, the rotating speed of the stirring blade is 50rpm, it is a film material mixture;

[0042] (2) Use a twin-screw extruder to extrude the film material mixture uniformly stirred in step (1). The temperature of the extrusion process is 183~190℃ in the first zone, and the temperature in the second zone is 195~204℃, the temperature of the third zone is 20...

Embodiment 3

[0046] (1) Take 5 parts of hydroxypropyl chitosan, 22 parts of polylactic acid, 5 parts of ethyl cellulose, 7 parts of 2-hexenyl succinic anhydride by weight, and combine chitosan, polylactic acid, ethyl cellulose , 2-hexenyl succinic anhydride is stirred evenly at a temperature of 90℃, the stirring time is 2h, and the rotating speed of the stirring paddle is 150rpm; after raising the temperature to 95℃, add 6 parts of polyvinyl chloride, 5 parts of polypropylene, and 2 parts of diisodecyl phthalate, stir evenly again, the stirring time is 60min, the rotating speed of the stirring blade is 50rpm, it is the film material mixture;

[0047] (2) Use a twin-screw extruder to extrude the film material mixture uniformly stirred in step (1). The temperature of the extrusion process is 183~190℃ in the first zone, and the temperature in the second zone is 195~204℃, the temperature of the third zone is 208~215℃;

[0048] (3) After the twin-screw extrusion treatment in step (2), the extruded ...

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Abstract

The invention belongs to the field of packaging materials and discloses a hydroxypropyl chitosan composite film material. The hydroxypropyl chitosan composite film material is composed of the following components according to the weight ratio: hydroxypropyl chitosan 5-14 17-22 parts of polylactic acid, 5-16 parts of ethyl cellulose, 4-7 parts of 2-hexenyl succinic anhydride, 6-9 parts of polyvinyl chloride, 5-12 parts of polypropylene, phthalic acid 2 to 4 parts of diisodecyl ester. The preparation method includes stirring, extruding, packaging and the like. The hygroscopicity of hydroxypropyl chitosan composite film material is only 1.4% to 2.2%. In addition, the water vapor transmission rate of the hydroxypropyl chitosan composite film material was measured by a moisture permeability meter. The experimental temperature was 25°C and the humidity was 70%. The measurement result was 0.06g / (m 2 24h) to 0.29g / (m 2 24h).

Description

Technical field [0001] The invention belongs to the field of film materials, and relates to a composite thin material and a preparation method thereof, in particular to a hydroxypropyl chitosan composite film material and a preparation method thereof. Background technique [0002] Polymer materials are a research direction that has emerged in recent years. Among them, the film material with natural polymer material as the main material has the characteristics of environmental protection and pollution-free. As well as the use of renewable resources to prepare polymer film materials, these have become a hot spot in current research in various countries. Composite materials are multiphase materials composed of two or more materials with different physical and chemical properties. Composite film materials have many uses and are widely used in the packaging industry. The composite film material has good tensile properties, higher elongation at break, and better thermal stability. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L5/08C08L1/28C08L27/06C08L23/12C08K5/12
Inventor 罗永生
Owner SHANTOU HONGQIAO PACKAGING IND CO LTD