Transparent freshness-preserving film capable of prolonging freshness-preserving time of fruits and vegetables and preparation process of transparent freshness-preserving film

A technology of fresh-keeping and fresh-keeping film for fruits and vegetables, applied in the field of plastic packaging, which can solve problems such as staleness, color difference, and accelerated corruption of fruit and vegetable products, and achieve good fresh-keeping effect, low product cost, and prolong the effect of sales cycle

Inactive Publication Date: 2015-12-16
SUZHOU NEW DISTRICT JIAHE PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently used plastic wrap is difficult to do this, so there is a possibility of accelerated spoilage for fruit and vegetable products that cannot be sold in time
On the other hand, there is a certain color difference between wrapped fr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example one

[0015] A transparent cling film that can prolong the fresh-keeping time of fruits and vegetables. It consists of 1000 parts of polyethylene, 100 parts of kaolin, 4 parts of sodium alginate, 16 parts of chitosan, and 300 parts of phthalic acid. Dioctyl ester, 8 parts of ultraviolet absorber, 50 parts of polyphenyl phosphonate diphenyl sulfone ester, 30 parts of antibacterial agent, 200 parts of beeswax, 30 parts of silicon dioxide and 0.2 parts of ultramarine. Among them, the antibacterial agent is a silver ion antibacterial agent, more preferably SilvaDur from Dow TM ET product; ultramarine as a color supplement; kaolin is ultra-fine kaolin with a particle size of less than 2μm accounting for 90%.

[0016] The preparation process of the above-mentioned cling film includes, step 1), dissolving: mixing and stirring the above-mentioned raw materials at a temperature of 175°C, and then cooling to 160°C after being evenly stirred. Step 2), film blowing: pour the ag...

Example Embodiment

[0017] Example two

[0018] A transparent cling film that can prolong the fresh-keeping time of fruits and vegetables. The composition by weight is: 1200 parts of polyethylene, 120 parts of kaolin, 30 parts of sodium alginate, 150 parts of chitosan, 600 parts of phthalic acid Dioctyl ester, 2 parts of ultraviolet absorber, 20 parts of polyphenyl diphenyl phosphonate, 1.5 parts of antibacterial agent, 100 parts of beeswax, 10 parts of silicon dioxide and 0.4 parts of ultramarine. Among them, the antibacterial agent is vanillin, and the kaolin is ultrafine kaolin, and the content of the particle size less than 2 μm is 95%.

Example Embodiment

[0019] Example three

[0020] A transparent cling film that can prolong the fresh-keeping time of fruits and vegetables. It consists of 1100 parts of polyethylene, 110 parts of kaolin, 17 parts of sodium alginate, 88 parts of chitosan, and 450 parts of phthalic acid. Dioctyl ester, 5 parts of ultraviolet absorber, 35 parts of polyphenyl diphenyl phosphonate, 16 parts of antibacterial agent, 150 parts of beeswax, 20 parts of silicon dioxide and 0.3 parts of ultramarine. Among them, the antibacterial agent is an ethyl vanillin compound, and the kaolin is an ultrafine kaolin whose particle size is less than 2 μm, accounting for 93%.

[0021] The main performance indexes of the cling film prepared in the above embodiments are listed in Table 1.

[0022] Table 1 Main performance indexes of the cling film prepared in each embodiment of the present invention

[0023] Pilot projects unit Example one Example two Example three Control example Tensile Strength MPa39434137 Elongation at b...

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Abstract

The invention discloses a transparent freshness-preserving film capable of prolonging the freshness-preserving time of fruits and vegetables and a preparation process of the transparent freshness-preserving film. The transparent freshness-preserving film is characterized by being prepared from, by weight, 1000-1200 parts of polyethylene, 100-120 parts of kaolin, 4-30 parts of sodium alginate, 16-150 parts of chitosan, 300-600 parts of dioctyl phthalate, 2-8 parts of ultraviolet light absorbent, 20-50 parts of polysulfonyldiphenylene phenyl phosphonate, 2-30 parts of antibacterial agents, 100-200 parts of beeswax and 10-30 parts of silicon dioxide, wherein the dioctyl phthalate serves as plasticizer. The transparent freshness-preserving film and the preparation method thereof have the advantages that the technology is good in holemaking effect, simple in process and low in product cost. By adding an appropriate number of inorganic particles, the film weight is increased, the transparency of the film is improved, meanwhile, the strength and softness of the film are further improved, the film can have a better freshness-preserving effect, the selling cycle is prolonged, the loss and consumption are lowered, and thereby the operation cost of a supermarket is lowered.

Description

Technical field [0001] The invention belongs to the technical field of plastic packaging, and specifically relates to a transparent preservative film capable of prolonging the preservation time of fruits and vegetables and a preparation process thereof. Background technique [0002] Polyethylene and polyvinyl chloride cling film are widely used in daily life. For the temporary preservation of vegetables, fruits and household food, as well as to prevent the smell of food during storage, the cling film must be used. At present, fruit and vegetable sales areas in supermarkets often use plastic wrap to simply package fruit and vegetable foods to make them more selling points. However, fruit and vegetable products must not only prevent insect bites or other external damage, but also ensure that the harmful gases generated during storage must be discharged in time to ensure fresh. However, the plastic wrap currently used is difficult to achieve this, so there is a possibility of accel...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L5/04C08L5/08C08L85/02C08K13/02C08K3/34C08K5/12C08K3/08C08K5/13C08K3/36
CPCC08L23/06C08K2201/003C08L2203/16C08L2205/02C08L2205/035C08L5/04C08L5/08C08L85/02C08K13/02C08K3/346C08K5/12C08K2003/0806C08K5/13C08K3/36
Inventor 蒋学功
Owner SUZHOU NEW DISTRICT JIAHE PLASTIC
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