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

A biodegradable and barrier technology, used in biological packaging, flexible covering, transportation and packaging, etc., can solve the problems of difficult degradation, difficult recycling, and the lack of barrier properties of biodegradable materials.

Inactive Publication Date: 2013-03-20
KINGFA SCI & TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment 1-9

[0037] 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:

[0038] (1) Dry each raw material in an oven at 80°C for 5 hours;

[0039] (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;

[0040] (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:

[0041] Temperature setting: 80 / 150 / 190 / 190 / 190 / 190 / 190 / 190 / 170℃

[0042] Feeding speed: 100kg / h

[0043] Screw speed: 300rpm

[0044] Vacuum pressure: 0.4 atmosphere;

[0045] 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-property film as well as a preparation method and an application thereof. The biodegradation barrier-property film is prepared from the following components in percentage by weight: 0-80% of biodegradable homopolyester, 0.80% of biodegradable copolyester, 1-30% of ethylene-vinyl alcohol copolymer, 5-60% of starch and 2-30% of polyhydric alcohol. According to the starch-containing biodegradable barrier-property film as well as the preparation method and the application thereof, the biodegradable homopolyester having a faster biodegradation speed, the biodegradable copolyester having better processing performances and the ethylene-vinyl alcohol copolymer having good barrier property are adopted and blended according to different proportions, and the film prepared from obtained composition not only has biological degradability, but also has the barrier property, can be widely applied to the packaging fields and particularly can be widely applied to the packaging fields of foodstuffs and medicines.

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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IPC IPC(8): C08L67/04C08L67/02C08L29/04C08L3/02C08K5/053B65D65/46
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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