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A starch wrapping paper capable of improving microwave heating and its preparation method

A technology for microwave heating and wrapping paper, applied in the field of starch wrapping paper and its preparation, can solve the problems of uneven temperature distribution, low penetration depth, uneven heating temperature, etc. low cost effect

Active Publication Date: 2017-04-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, there is heating temperature inhomogeneity in microwave heating
Since the object to be processed is often not a single component, the dielectric constant of various substances is different, and the dielectric loss factor is different. Therefore, in the same microwave environment, the degree to which the substance itself absorbs microwave energy and converts it into heat energy is different, and the final performance is temperature. Uneven distribution, it is difficult to get ideal heating effect
Secondly, there is inhomogeneity in the electromagnetic field generated by microwaves
Although a rotatable material carrier is used, the improvement effect on the inhomogeneity of the electromagnetic field is limited
In addition, excessive energy generated by the corners may cause overheating and irreversible drying of the material, eventually leading to burning of the material and generation of bad odors
Finally, the penetration depth of microwaves to materials is limited
Although the penetration depth of microwave radiation at 915MHz is higher than that at 2450MHz, compared with other radio frequencies (10-300MHz), its penetration depth is still relatively low, which limits the application and promotion of microwave technology in actual production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A starch wrapping paper capable of improving microwave heating and its preparation method
  • A starch wrapping paper capable of improving microwave heating and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Configuration of starch slurry: Weigh 1g of high-amylose cornstarch, add distilled water at a ratio of 1:50 (w / v), stir with a glass rod and form starch slurry;

[0021] (2) Gelatinization: gelatinize the starch slurry obtained in step (1) in a hot water bath at a temperature of 100°C for 12 minutes, and use a glass rod to continuously stir during the gelatinization process to obtain a starch paste;

[0022] (3) Preparation of matrix slurry: Weigh emulsifier and thickener according to the ratio of 1:2 (m / m). The total amount of emulsifier and thickener is 8% of the dry weight of starch. Add distilled water at a ratio of 50 (m / v), dissolve in hot water at a temperature of 80°C, and obtain a matrix slurry;

[0023] (4) Preparation of complex clathrate: mix the starch paste obtained in step (2) with the matrix slurry obtained in step (3), and after ultrasonic treatment (ultrasonic power 600w, 10min), press 1:1:3 (m / m / m) ratio of adding sodium sulfate, aluminum powder...

Embodiment 2

[0027] (1) Configuration of starch slurry: Weigh 5g of high linear hydroxypropyl starch, add distilled water according to the ratio of 1:100 (m / v), stir with a glass rod and form starch slurry;

[0028] (2) Gelatinization: gelatinize the starch slurry obtained in step (1) in a hot water bath at a temperature of 85°C for 20 minutes, and use a glass rod to continuously stir during the gelatinization process to obtain a starch paste;

[0029] (3) Configuration of matrix slurry: Weigh the emulsifier and thickener according to the ratio of 1:5 (m / m) (the total amount of emulsifier and thickener is 12% of the dry weight of starch), after mixing evenly, according to 1 : Add distilled water at a ratio of 40 (m / v), dissolve in hot water at a temperature of 80°C, and obtain a matrix slurry;

[0030] (4) Preparation of composite clathrate: mix the starch paste obtained in step (2) with the matrix slurry obtained in step (3), and perform high-pressure homogenization treatment (60°C, prima...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses starch wrapping paper capable of improving microwave heating and a preparation method thereof, and belongs to the technical field of starch wrapping paper preparation. The starch is used as a raw material, and an emulsifying agent and a thickening agent are used as a substrate; after the materials are pasted, ultrasonically treated or homogeneously processed under high pressure, an auxiliary material of a composite clathrate is added and is coated on the carrier to be dried to prepare the starch wrapping paper. According to the starch wrapping paper, the effect of microwave heating can be effectively improved, the smoothness and the transparency of the starch wrapping paper are improved, the carrier can be flexibly selected to be coated according to different industrial production requirements, the application range is wide, the cost is low, and the microwave heating effect is obviously improved. Besides, the entire production process has no special requirements, the pollution problem is not caused to the environment, and the starch wrapping paper is extremely suitable for industrial production, application and generalization.

Description

technical field [0001] The invention relates to starch wrapping paper capable of improving microwave heating and a preparation method thereof, belonging to the technical field of starch wrapping paper preparation. Background technique [0002] Microwave (microwave, MV) is the electromagnetic wave with the shortest wavelength among radio waves, it includes the wavelength range from 1mm to 1m, and its corresponding frequency range is from 300MHz to 300GHz. The generation, transmission, amplification, and radiation of microwaves are different from ordinary radio or alternating current. Microwaves usually have three basic properties namely absorption, penetration and reflection. For porcelain, glass and plastics, microwaves are almost not absorbed but fully penetrated; for materials such as food and water, microwaves will be absorbed and generate heat; for metals, microwaves will be reflected. [0003] At present, the microwave frequencies mainly used in industry are 915 and 2...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L3/02C08L3/12C08L3/18C08K13/02C08K3/30C08K3/08C08K5/053C08K3/26
Inventor 陈海英徐学明崔政伟杨哪吴凤凤郑颢烽
Owner JIANGNAN UNIV