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Edible starch-based food packaging film and preparation method thereof

A food packaging film, starch-based technology, applied in the field of starch-based edible packaging film and its preparation, can solve the problems of high energy consumption, unsuitable for industrial production, low production efficiency, etc., and achieves low energy consumption, low production cost, The effect of high production efficiency

Active Publication Date: 2010-12-01
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of edible starch film is mainly the solution casting method. This method needs to evaporate a large amount of solvent during the film drying process, which not only consumes a lot of energy, but also has low production efficiency, which is not suitable for industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Pour 30Kg of acetylated cross-linked tapioca starch, 3.75Kg of carboxymethyl cellulose, 125g of stearic acid, and 30g of glyceryl monostearate into a high-speed blender, and mix well. The mixture of 90g of paraffin wax and 9.28Kg of glycerin is evenly and slowly added to the high-speed mixer, and mixed at a high speed. The mixed material is granulated in a twin-screw extruder, the temperature of the first zone is 50°C, the temperature of the second zone is 120°C, and the screw speed is 50 rpm, and the powder is processed into granules with a diameter of 3mm. The pellets are made into a film in a single-screw extruder blow molding system. The barrel temperature of the single-screw extruder is 50°C in the first zone, 120°C in the second zone, and 130°C in the third zone. The temperature of the film blowing head is 125°C. When the ratio is 4, an edible and fully degradable food packaging film with a thickness of 62 μm can be prepared.

Embodiment 2

[0028] Example 2: Pour 30Kg of phosphorylated cross-linked cornstarch, 10Kg of pectin, 230g of stearic acid, and 50g of glyceryl monostearate into a high-speed blender, and mix well. The mixture of 120g beeswax and 13.15Kg glycerin is evenly and slowly added to the high-speed mixer, and mixed at a high speed. The mixed material is granulated in a twin-screw extruder, the temperature of the first zone is 70°C, the temperature of the second zone is 130°C, and the screw speed is 50 rpm, and the powder is processed into granules with a diameter of 2.5mm. The pellets are made into film in a single-screw extruder blow molding system. The barrel temperature of the single-screw extruder is 60°C in the first zone, 125°C in the second zone, and 135°C in the third zone. The temperature of the film blowing head is 130°C. The ratio is 3.5, and an edible fully degradable food packaging film with a thickness of 81 μm can be prepared.

Embodiment 3

[0029] Example 3: Pour 30Kg hydroxypropyl cross-linked potato starch, 3.0Kg pullulan, and 46g sucrose fatty acid ester into a high-speed mixer, and mix well. The mixture of 127g peanut oil, 230g oleic acid and 10.5Kg glycerin is evenly and slowly added to a high-speed mixer, and mixed at a high speed. The mixed material is granulated in a twin-screw extruder, the temperature of the first zone is 80°C, the temperature of the second zone is 130°C, and the screw speed is 30 rpm, and the powder is processed into granules with a diameter of 2.4mm. The pellets are made into film in a single-screw extruder blow molding system. The barrel temperature of the single-screw extruder is 90°C in the first zone, 130°C in the second zone, and 130°C in the third zone. The temperature of the film blowing head is 125°C. The ratio is 5.6, and an edible fully degradable food packaging film with a thickness of 58 μm can be prepared.

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PUM

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Abstract

The invention relates to an edible starch-based food packaging film and a preparation method thereof. The edible starch-based packaging film with high mechanical strength, barrier property, ageing resistance and heat sealability is prepared from a main film-forming raw material stabilized crosslinking compound modified starch, and auxiliary materials such as food grade plasticizers, lubricants, reinforcers, stabilizers and the like through high speed stirring and mixing, twin-screw extrusion granulation and single-screw extrusion blow molding. The preparation method has the characteristics of low energy consumption, high production efficiency and suitability for continuous industrialized production. The film has the advantages of edibility, full-degradable property, wide application for inner packaging of foods and no environmental pollution caused by non-degradable food packages.

Description

(1) Technical field [0001] The invention relates to a starch-based edible packaging film and a preparation method thereof, belonging to the field of food packaging materials. (2) Background technology [0002] The main material currently used for food packaging is petroleum-based non-degradable plastic film. Since food packaging is disposable and short-term packaging, and my country has a large population and a huge total food consumption, the pollution caused by non-degradable plastics is more prominent than other countries and regions. At the same time, the main raw materials of my country's fast food packaging, fresh-cut fruit and vegetable packaging, and various small food packaging are polyethylene or polyvinyl chloride. Plasticizers and various processing aids are added to these food packaging films during the production process. security poses a threat. [0003] The edible fully degradable food packaging film prepared with starch as the base material has the selectiv...

Claims

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Application Information

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IPC IPC(8): C08L3/04B65D65/46B29C49/04B29C47/92B29B9/06B29C48/92
CPCB29C48/0017B29C48/04B29C48/10B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 侯汉学董海洲代养勇张慧
Owner SHANDONG AGRICULTURAL UNIVERSITY
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