Starch-containing biodegradable barrier thin film, as well as preparation method and application thereof

A biodegradable and barrier technology, applied in bio-packaging, flexible coverings, transportation and packaging, etc., can solve the problems that biodegradable materials do not have barrier properties, are difficult to recycle, and are difficult to degrade

Inactive Publication Date: 2013-03-27
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, barrier materials widely used in the fields of food and medicine are film products with multi-layer structure made of traditional plastics. Although they have good barrier properties, they can exist stably in nature for a long time and are difficult to degrade. It is difficult to recycle after it is discarded, causing serious pollution to the environment.
However, the biodegradable materials used in the packaging field do not have barrier properties, so they cannot be widely used in the fields of food and medicine.

Method used

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  • Starch-containing biodegradable barrier thin film, as well as preparation method and application thereof
  • Starch-containing biodegradable barrier thin film, as well as preparation method and application thereof
  • Starch-containing biodegradable barrier thin film, as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0039] A starch-containing biodegradable barrier film, the raw materials of which are shown in Table 1-3 (in Table 1-3, the unit of the amount of raw materials is mass percentage), and its preparation method includes the following steps:

[0040] (1) Dry each raw material in an oven at 80°C for 5 hours;

[0041] (2) Add the dried raw materials into the high mixer, first stir at low speed for 5 minutes, then stir at high speed for 3 minutes;

[0042] (3) Put the uniformly mixed materials into the twin-screw extruder. The diameter of the extruder is 40mm, the ratio of length to diameter is 36:1, and there are 9 heating zones and a vacuum exhaust device. The extrusion process selects the following operating conditions:

[0043] Temperature setting: 80 / 150 / 190 / 190 / 190 / 190 / 190 / 190 / 170℃

[0044] Feeding speed: 100kg / h

[0045] Screw speed: 300rpm

[0046] Vacuum pressure: 0.4 atmosphere;

[0047] After the strips of the extruder are made into granules by underwater hot cutting,...

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Abstract

The invention discloses a starch-containing biodegradable barrier thin film, as well as a preparation method and application thereof. The biodegradable barrier thin film is prepared from 0-80% of biodegradable homopolyester, 0-80% of biodegradable copolyester, 1-30% of aliphatic polycarbonate, 5-60% of starch and 2-30% of polylol. The biodegradable barrier thin film disclosed by the invention is formed by mixing the biodegradable homopolyester with higher biodegradation speed, the biodegradable copolyester with better processing performance and the aliphatic polycarbonate with good barrier property according to different proportions, and the thin film prepared from an obtained composition has biodegradability and barrier property, and can be widely applied to the packaging field, in particular to the food and medicine packaging field.

Description

technical field [0001] The invention relates to a starch-containing biodegradable barrier film, a preparation method and application thereof. Background technique [0002] General-purpose plastics are widely used in various fields due to their excellent comprehensive properties. They are listed as the four major support materials along with steel, wood, and cement, and their annual usage continues to rise. General-purpose plastics such as polyethylene (PE), polypropylene (PP) and polystyrene (PS) can exist stably in nature for a long time and are difficult to degrade. Therefore, they are difficult to recycle after they are discarded, causing serious pollution to the environment. Biodegradable plastics have become one of the effective ways to solve the problem of plastic waste environmental pollution because of their rapid degradation in the natural environment, which has attracted people's attention, and countries all over the world are competing to develop biodegradable pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L69/00C08L3/02C08L3/04C08K5/053B65D65/46
CPCY02W90/10
Inventor 焦建苑仁旭熊凯钟宇科赵巍徐依斌曾祥斌蔡彤旻夏世勇
Owner KINGFA SCI & TECH CO LTD
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