Degradable bacteriostatic food packing material and preparation method thereof

A technology for food packaging and polymer materials, applied in the field of food and fruit packaging and preservation, can solve the problems of lack of fresh-keeping strength, inability to inhibit bacterial growth, and prevent food spoilage, and achieve the effects of strong fresh-keeping strength, synchronous service life and simple process.

Active Publication Date: 2011-02-16
SICHUAN KUIKE BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biodegradable polymer announced by Chinese patent CN1603361A adopts a biodegradable polymer composed of polylactic acid and starch. It is used in food packaging materials without adding antibacterial materials, has no freshness preservation, and cannot inhibit bacterial growth. prevent food spoilage

Method used

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  • Degradable bacteriostatic food packing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]A degradable antibacterial food packaging material and a preparation method thereof, characterized in that:

[0029] A. Chitosan is irradiated and degraded using a cobalt source radioactive source at normal temperature and pressure, so that the molecular weight of chitosan is controlled within the range of 1000, the degree of deacetylation is within the range of 80%, and the irradiation dose rate is 5 kGy Gray / hour, the absorbed dose is 20 kGy;

[0030] B, vinyl three (beta-methoxyethoxy) silane is dissolved in ethanol, is mixed with the mass percent concentration and is the vinyl three (beta-methoxyethoxy) silane solution of 20%;

[0031] C, the resulting 20% ​​vinyl tris (beta-methoxyethoxy) silane solution of step B and the degraded chitosan obtained in step A are mixed and stirred with a stirrer under airtight conditions, and the stirring speed is 60 Rev / min, stirring time 3 minutes, obtain the chitosan mixture containing vinyl tris (beta-methoxyethoxy) silane, wher...

Embodiment 2

[0036] A degradable antibacterial food packaging material and a preparation method thereof, characterized in that:

[0037] A. Chitosan is irradiated and degraded using a cobalt source radioactive source at normal temperature and pressure, so that the molecular weight of chitosan is controlled within the range of 100,000, the degree of deacetylation is within the range of 95%, and the irradiation dose rate is 10 kGy Gray / hour, the absorbed dose is 200 kGy;

[0038] B, silane vinyl tris (β-methoxyethoxy) silane is dissolved in ethanol, and it is 5% vinyl tris (β-methoxyethoxy) silane solution that is mixed with mass percent concentration;

[0039] C, the degraded chitosan obtained by the 5% vinyl tris (beta-methoxyethoxy) silane solution obtained in step B and the obtained step A are mixed and stirred by a stirrer under airtight conditions, and the stirring speed is 500 Rev / min, stirring time 5 minutes, obtain the chitosan mixture containing vinyl tris (beta-methoxyethoxy) sil...

Embodiment 3

[0044] A degradable antibacterial food packaging material and a preparation method thereof, characterized in that:

[0045] A. Chitosan is irradiated and degraded using a cobalt source radioactive source at normal temperature and pressure, so that the molecular weight of chitosan is controlled within the range of 50,000, the degree of deacetylation is within the range of 85%, and the irradiation dose rate is 7 kGy Gray / hour, the absorbed dose is 100 kGy;

[0046] B, silane vinyl tris (beta-methoxyethoxy) silane is dissolved in ethanol, is mixed with the vinyl tris (beta-methoxyethoxy) silane solution that mass percent concentration is 10%;

[0047] C, the resulting 10% vinyl tris (beta-methoxyethoxy) silane solution of step B and the degraded chitosan obtained by step A are mixed and stirred by a stirrer under airtight conditions, and the stirring speed is 200 Rev / min, stirring time 4 minutes, obtain the chitosan mixture containing vinyl tris (beta-methoxyethoxy) silane, wher...

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Abstract

The invention discloses a degradable bacteriostatic food packing material and a preparation method thereof. The preparation method comprises the following steps: irradiating chitosan by a radiation method for degradation; adding coupling agent aid solution into the degraded chitosan, mixing and stirring; drying the mixture to remove the solvent and then adding a degradable polymer material and mixing; and adding lubricant and plasticizer and finally preparing a film product. The invention adopts chitosan as an antibacterial raw material. The chitosan has high antibacterial activity and can suppress the growth and breeding of certain fungi, bacteria and viruses; and a small amount of the chitosan is used, and the toxic side effect is avoided; polylactic acid and polycaprolactone can be degraded completely, and the film forming performance and the processability are high; the film material prepared by combining the chitosan is used as bacteriostatic preservative material, and compared with the common packing material, has good bacteriostatic effect and strong preservation power and can prolong the shelf life of the food; moreover, the bacteriostatic long-term effectiveness of the bacteriostatic plastic can be synchronized with the service life of the product, thus being convenient and economic; and after the using period, the bacteriostatic plastic can be either recycled or degraded and assimilated with the nature without causing environmental pollution.

Description

technical field [0001] The invention relates to a food packaging material, in particular to a food packaging material made of chitosan, polylactic acid, etc., which is completely biodegradable and has strong antibacterial power, and can be widely used in food and fruit packaging and preservation. Background technique [0002] With the continuous use of plastics and the increasing consumption, agricultural plastics, packaging plastics and wastes of various plastic products have become one of the global sources of serious pollution. Currently commonly used packaging plastics mainly include polyethylene, polypropylene, polystyrene and so on. After these plastics are discarded, they can exist in the natural environment for a long time due to their strong stability, causing serious damage to the human living environment and natural landscape. In recent years, while people are studying the recycling technology of waste plastics, degradable plastics have also become a research hot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04B65D65/46C08J3/28C08L5/08
CPCY02A40/90Y02W90/10
Inventor 胡单
Owner SICHUAN KUIKE BIOTECH
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