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Starch-based edible film and preparation method thereof

A starch-based, edible technology, applied in the field of starch-based edible film and its preparation, can solve the problems of low production efficiency, inapplicability to industrial production, and high energy consumption, and achieve high production efficiency, low production cost, and low energy consumption. Effect

Inactive Publication Date: 2012-01-04
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: Add 30Kg of acetylated oxidized tapioca starch, 3.26Kg of carboxymethyl cellulose, 80g of stearic acid, and 22g of glyceryl monostearate into a high-speed blender, and mix well. The mixture of 70g of paraffin wax and 10.35Kg 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 70°C, the temperature of the second zone is 130°C, and the screw speed is 45 rpm, and the powder is processed into granules with a diameter of 2mm. The granules are made into films in a single-screw extruder extrusion casting system. The barrel temperature of the single-screw extruder is 60°C in the first zone, 130°C in the second zone, and 140°C in the third zone. The temperature of the casting head is 135°C. An edible and fully degradable food packaging film with a thickness of 58 μm was prepared.

Embodiment 2

[0028] Example 2: Pour 30Kg of phosphorylated and acid-thinned cornstarch, 8Kg of pectin, 210g of stearic acid, and 60g of glyceryl monostearate into a high-speed blender, and mix well. The mixture of 90g liquid beeswax and 15.62Kg 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 90°C, the temperature of the second zone is 140°C, and the screw speed is 90 rpm, and the powder is processed into granules with a diameter of 2.4mm. The granules are made into films in a single-screw extruder extrusion casting system. The barrel temperature of the single-screw extruder is 80°C in the first zone, 135°C in the second zone, and 145°C in the third zone. The temperature of the casting head is 150°C. An edible fully degradable food packaging film with a thickness of 76 μm was prepared.

Embodiment 3

[0029] Example 3: Pour 30Kg of hydroxypropyl oxidized potato starch, 2.0Kg of pullulan, and 59g of sucrose fatty acid ester into a high-speed mixer, and mix well. The mixture of 124g peanut oil, 105g oleic acid and 12.85Kg 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 90°C, the temperature of the second zone is 150°C, and the screw speed is 100 rpm, and the powder is processed into granules with a diameter of 2.1 mm. The granules are made into a film in a single-screw extruder extrusion casting system. The barrel temperature of the single-screw extruder is 90°C in the first zone, 135°C in the second zone, and 140°C in the third zone. The temperature of the casting head is 155°C. An edible fully degradable food packaging film with a thickness of 55 μm was prepared.

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Abstract

The invention relates to a starch-based edible film and a preparation method thereof. The starch-based edible film is a starch-based edible packaging film with favorable flexibility, barrier property, ageing-resistance property and heat sealing property, which is prepared by adopting the preparation method comprising the following steps of: adding a food-grade plasticizer, a lubricating agent, a reinforcing agent, a stabilizing agent and other accessories by taking stably-degraded composite modified starch as a main film-forming raw material, stirring and mixing at high speed, carrying out double-screw extrusion granulation and then carrying out single-screw extrusion casting to obtain the finished product. The invention has the characteristics of low energy consumption and high production efficiency and is suitable for industrial continuous production. The prepared film in the invention has edibility and full degradability, can be widely applied to inner packaging of foods, and avoids non-degradable food packages from polluting the environment.

Description

(1) Technical field [0001] The invention relates to a starch-based edible 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 selective permeabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/04C08L1/26C08L5/06C08L5/00C08L5/04C08K5/09C08K5/103C08K5/053C08K3/34B29D7/01B65D65/46
CPCY02W90/10
Inventor 董海洲侯汉学王兆升刘传富
Owner SHANDONG AGRICULTURAL UNIVERSITY
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