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Full-biodegradable preservative film and preparation method thereof

A technology of biodegradable polyester and plastic wrap, applied in the field of fully biodegradable plastic wrap and its preparation, can solve the problems of shortening the preservation time of fruits and vegetables, perishable food, and non-compliance of gas barrier and water vapor permeability of plastic wrap , to achieve the effect of improving fresh-keeping storage time and good toughness

Inactive Publication Date: 2017-05-31
WEIHAI GONGDA PLASTIC CEMENT CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in the use of preservative films made of biodegradable materials, such as gas barrier properties and water vapor permeability of preservative films that do not meet the requirements, making fresh-keeping foods easy to spoil
In addition, fruits and vegetables will continuously release ethylene gas in the fresh-keeping bag. Ethylene gas is a ripening agent for fruits and vegetables. If the ethylene gas released by fruits and vegetables is not effectively removed, the preservation time of fruits and vegetables will be greatly shortened.

Method used

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  • Full-biodegradable preservative film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Dry polylactic acid (produced by NatureWorks, USA, 4032D) and biodegradable polyester PBAT (produced by BASF, blown film grade) in an oven at 60°C for 24 hours, and dry ultrafine talc powder as an inorganic filler in an oven at 100°C 4h.

[0022] (2) Weigh the following components by weight according to the above ratio: 95 parts of polylactic acid, 5 parts of biodegradable polyester PBAT, toughening agent (produced according to the method in Example 1 of the invention patent ZL201410662335.X) 10 0.1 part of ethylene decomposition absorbent potassium permanganate, 5 parts of inorganic filler superfine talc powder, 0.1 part of processing aid lubricant erucamide; add the above raw materials into the high-speed mixer, and mix at room temperature for 5-10 minutes .

[0023] (3) Add the homogeneously mixed raw materials in step (2) into a twin-screw extruder, melt and blend at 120-190° C., extrude, modify and granulate to obtain a special modified material for plastic wr...

Embodiment 2

[0027] (1) Dry polylactic acid (produced by Zhejiang Hisun Company, film grade) and biodegradable polyester PBS (produced by Anqing Hexing Company, blown film grade) in an oven at 80°C for 2 hours, and dry the inorganic filler ultrafine calcium carbonate at 120 ℃ oven dry for 2h.

[0028] (2) Weigh the following components by weight according to the above ratio: 70 parts of polylactic acid, 30 parts of biodegradable polyester PBS, toughening agent (produced according to the method in Example 1 of the invention patent ZL201410662335.X) 6 4 parts of ethylene decomposition absorbent silver oxide, 10 parts of inorganic filler superfine calcium carbonate, 0.3 part of processing aid lubricant calcium stearate, and 0.3 part of antioxidant 1010; Mix at high speed for 5-10 minutes.

[0029] (3) Add the homogeneously mixed raw materials in step (2) into a twin-screw extruder, melt and blend at 120-190° C., extrude, modify and granulate to obtain a special modified material for plastic ...

Embodiment 3

[0033] (1) Dry polylactic acid (produced by Shenzhen Guanghua Weiye Company, film grade) and biodegradable polyester PBSA (produced by Anqing Hexing Company, blown film grade) in an oven at 70°C for 3 hours, and dry ultrafine kaolin with inorganic filler at 110°C Dry in oven for 3h.

[0034] (2) Weigh the following components by weight according to the above ratio: 5 parts of polylactic acid, 95 parts of biodegradable polyester PBSA, toughening agent (produced according to the method in Example 1 of the invention patent ZL201410662335.X) 1 6 parts, ethylene decomposition absorber rare earth oxide 6 parts, inorganic filler superfine kaolin 20 parts, processing aid lubricant calcium stearate 0.5 part, antioxidant 10100.3 parts; Add the above-mentioned raw materials in the high mixer, under normal temperature Mix at high speed for 5-10min.

[0035] (3) Add the homogeneously mixed raw materials in step (2) into a twin-screw extruder, melt and blend at 120-190° C., extrude, modify...

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Abstract

The invention relates to a full-biodegradable preservative film and a preparation method thereof, belonging to the field of high molecular materials. The full-biodegradable preservative film is characterized by being prepared from the following components in parts by weight: 95-5 parts of polylactic acid, 5-95 parts of biodegradable polyester, 1-10 parts of toughening agent, 0.1-6 part of ethylene decomposition absorbent, 1-20 parts of inorganic filler and 0.1-0.8 part of processing aid. The full-biodegradable preservative film provided by the invention has good toughness, can be fully biodegraded and avoids environmental pollution after being used and discarded; and moreover, the preservative film decomposes the ethylene gas released in the fruit / vegetable storage process under the effect of ethylene decomposition absorbent, and thus, the fruit / vegetable preservation time is greatly prolonged.

Description

technical field [0001] The invention relates to the field of preparation of polymer materials, in particular to a fully biodegradable fresh-keeping film and a preparation method thereof. Background technique [0002] As we all know, the plastic films commonly used for fruit and vegetable preservation are made of polyethylene, polypropylene, polyvinyl chloride and other materials. Reuse will easily cause serious pollution to the environment. [0003] Biodegradable materials such as polylactic acid (PLA), polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), poly(butylene terephthalate-co-hexyl Butylene glycol diacid (PBAT), polyhydroxyalkanoate (PHA), etc. are all biodegradable polymer materials. These materials are discarded in nature after use, and can eventually be completely degraded into h 2 O and CO 2 ; If the fruit and vegetable plastic wrap is prepared with biodegradable materials, it will have a good protective effect on the environment. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L67/00C08K3/24C08K3/34C08K5/20C08K3/22C08K3/26C08K5/098
CPCC08L67/04C08J5/18C08J2367/02C08J2367/04C08J2467/02C08J2467/04C08L67/02C08L2201/06C08L2203/16C08L2205/02C08L2205/03C08L67/00C08K3/24C08K3/34C08K5/20C08K2003/2286C08K2003/265C08K5/098C08K2003/221C08K3/346
Inventor 袁角亮孙波
Owner WEIHAI GONGDA PLASTIC CEMENT CHEM CO LTD
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