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A kind of biodegradable film packaging material and preparation method thereof

A film packaging, biodegradable technology, applied in the direction of biological packaging, sustainable packaging, packaging, etc., can solve the problems of poor elongation at break, poor mechanical strength, low printing quality, etc., to achieve increased crystallinity and good mechanical strength Effect

Inactive Publication Date: 2016-01-20
江苏古沙农业科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the problems of low crystallinity, poor mechanical strength and poor elongation at break, the existing biodegradable materials are prone to fracture problems, which limits the application of biomaterials. Therefore, there is an urgent need for a material with good crystallinity, mechanical strength and good elongation at break of biodegradable materials
[0004] At the same time, when the existing biodegradable materials are printed on the surface, the ink only volatilizes, conjunctival, and solidifies, and cannot be well combined with the surface of the film, which may easily cause problems such as low printing quality and falling off of the printed pattern.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Place polylactic acid, polyacetimide and polyvinyl alcohol with an average molecular weight of 6000 respectively to dry at 60°C for 3 hours, and then set aside;

[0030] (2) Mix 45kg of dried polylactic acid, 15kg of starch, 10kg of dried polyvinyl alcohol, 8kg of lignin and 4kg of glutaraldehyde at 140℃;

[0031] (3) Adjust the pH of the product of step 2 to 6.5, add 0.5 kg of sodium humate and 0.5 kg of dried branched polyethyleneimine, and stir evenly at a stirring rate of 450 rpm at 80°C. Ultrasound at 30°C for 0.5 hours, granulate and calender to form a 0.45mm biodegradable film packaging material.

[0032] The performance test results of the prepared biodegradable film packaging materials are shown in Table 1.

Embodiment 2

[0034] (1) Put polylactic acid, polyacetimide and polyvinyl alcohol with an average molecular weight of 8000 to dry at 75°C for 2 hours, and then set aside;

[0035] (2) Mix 45kg of dried polylactic acid, 18kg of starch, 16kg of dried polyvinyl alcohol, 10kg of lignin and 6kg of glutaraldehyde at 120℃;

[0036] (3) Adjust the pH value of the product of step 2 to 6.5, add 1 kg of sodium humate and 1 kg of dried branched polyethyleneimine, and stir evenly at a stirring rate of 350 rpm at 90°C. Ultrasound at ℃ for 1 hour, granulate and calender to obtain 0.51mm biodegradable film packaging material.

[0037] The performance test results of the prepared biodegradable film packaging materials are shown in Table 1.

Embodiment 3

[0039] (1) Put polylactic acid, polyacetimide and polyvinyl alcohol with an average molecular weight of 6000 respectively to dry at 60°C for 2 hours, and then set aside;

[0040] (2) Mix 66kg of dried polylactic acid, 20kg of starch, 18kg of dried polyvinyl alcohol, 10kg of lignin and 6kg of glutaraldehyde at 130℃;

[0041] (3) Adjust the pH value of the product of step 2 to 6.5, add 2 kg of sodium humate and 0.5 kg of dried branched polyethyleneimine, and stir evenly at a stirring rate of 300 rpm at 80°C. Ultrasound at 35°C for 0.5 hours, granulate and calender to form a biodegradable film packaging material with a thickness of 0.56 mm.

[0042] The performance test results of the prepared biodegradable film packaging materials are shown in Table 1.

[0043] Table 1

[0044] Test items Example 1 Example 2 Example 3 Tensile strength (MPa)182125 Elongation at break 38% 44% 49%

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Abstract

The invention discloses a biodegradable film packaging material and a preparation method thereof. The biodegradable film packaging material is made of the following components by weight: 45-66 parts of polylactic acid, 20-30 parts of starch, 10-18 parts of polyvinyl alcohol, 8-10 parts of lignin, 0.5 parts of sodium humate -2 parts, 0.5-1 parts of polyacetimide and 4-6 parts of glutaraldehyde. The biodegradable film packaging material prepared by the method of the present invention has good crystallinity, mechanical strength and good elongation at break, and its surface does not need special treatment, that is, it has good film surface tension and can make ink Combines well with film packaging materials.

Description

technical field [0001] The invention belongs to the field of film packaging materials, in particular to a biodegradable film packaging material and a preparation method thereof. Background technique [0002] With the development of the current society, various functional materials emerge in an endless stream. As people pay more and more attention to environmental issues, biodegradable materials have become a hot spot in current research and development, which can alleviate environmental problems to a certain extent. Therefore, materials with good biocompatibility, bioabsorbability and biodegradability are increasingly required by people. [0003] This type of biodegradable film material is widely used in the field of packaging and film materials for various products. Due to the problems of low crystallinity, poor mechanical strength and poor elongation at break, the existing biodegradable materials are prone to fracture problems, which limits the application of biomaterials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L3/02C08L29/04C08L97/02C08L79/02C08L99/00C08K5/07C08J5/18B65D65/38
CPCY02W90/10
Inventor 张太元
Owner 江苏古沙农业科技发展有限公司
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