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Paper-plastic food packaging film and preparation method thereof

A food packaging film, paper-plastic technology, applied in chemical instruments and methods, layered products, lamination devices, etc., can solve the problems of paper-plastic food packaging film performance degradation

Inactive Publication Date: 2017-11-17
芜湖市三山区绿色食品产业协会
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current adhesives can meet the requirements of general paper-plastic food packaging films, but in some cases of long service life and harsh conditions (high temperature, humidity), the gap between the paper and the polymer layer in the paper-plastic food packaging film The space is often easy to separate, which greatly reduces the performance of the paper-plastic food packaging film

Method used

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  • Paper-plastic food packaging film and preparation method thereof

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preparation example Construction

[0013] The invention provides a method for preparing a paper-plastic food packaging film, comprising:

[0014] 1) Ball milling starch, silica gel, shellac and polyoxyethylene sorbitan fatty acid ester to obtain a mixture;

[0015] 2) gelatinizing the mixture with water to obtain a gelatinized product;

[0016] 3) Ultrasonic vibration of polyurethane, sulfate, borate, nano-magnesium oxide, water, ethanol, toluene and gelatinized products to prepare adhesives;

[0017] 4) Coating the adhesive on the surface of the paper respectively, followed by drying to form an adhesive layer, and then hot-pressing the polymer material on the adhesive layer to form a plastic layer to obtain paper-plastic food packaging membrane.

[0018] In step 1) of the above preparation method, the amount of each material can be selected within a wide range, but in order to make the prepared paper-plastic food packaging film have more excellent stability, preferably, in step 1), starch The weight ratio o...

Embodiment 1

[0033] 1) Ball mill starch, silica gel, shellac and polyoxyethylene sorbitan fatty acid ester according to the weight ratio of 100:70:28:6 (mass ratio of large balls to small balls is 2:1.4, grinding balls and The mass ratio of materials is 10:4, the rotation speed is 1800rpm, and the ball milling time is 30min) to obtain a mixture (average particle size is 0.3μm);

[0034] 2) gelatinize the mixture and water at a weight ratio of 100:200 at 70°C for 20 hours to obtain a gelatinized product;

[0035] 3) Polyurethane (weight-average molecular weight 1800), sulfate, borate, nano-magnesium oxide (average particle size 3nm), water, ethanol, toluene and gelatinized products according to the ratio of 100:4.5:1.8:18:50: The weight ratio of 70:70:50 was ultrasonically oscillated at 50°C for 3 hours to prepare the adhesive;

[0036] 4) Coat the adhesive on the surface of the paper (thickness 0.9mm), then dry to form an adhesive layer (thickness 0.2mm), and then heat press the polypropy...

Embodiment 2

[0038] 1) Ball mill starch, silica gel, shellac and polyoxyethylene sorbitan fatty acid ester according to the weight ratio of 100:65:22:4 (mass ratio of large balls to small balls is 2:1.3, grinding balls and The mass ratio of materials is 10:0.8, the rotation speed is 1500rpm, and the ball milling time is 25min) to obtain a mixture (average particle size is 0.2μm);

[0039] 2) gelatinize the mixture and water at a weight ratio of 100:180 at 65°C for 12 hours to obtain a gelatinized product;

[0040] 3) Polyurethane (weight-average molecular weight 1500), sulfate, borate, nano-magnesium oxide (average particle size 1nm), water, ethanol, toluene and gelatinized products according to the ratio of 100:4:1.5:15:40: The weight ratio of 50:60:45 was ultrasonically oscillated at 40°C for 2 hours to prepare the adhesive;

[0041] 4) Coat the adhesive on the surface of the paper (thickness 0.8mm), then dry to form an adhesive layer (thickness 0.1mm), and then heat press the polypropy...

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Abstract

The invention discloses a paper-plastic food packaging film and a preparation method thereof. The preparation method includes the steps that 1, ball milling is conducted on starch, silica gel, shellac and polyoxyethylene sorbitan fatty acid ester to obtain a mixture; 2, gelatinization treatment is conducted on the mixture and water to prepare a gelatinized product; 3, ultrasonic vibration is conducted on polyurethane, sulfate, borate, nano-magnesium oxide, water, ethanol, toluene and the gelatinized product to prepare adhesive; 4, the surface of paper is coated with the adhesive, then drying is conducted to form an adhesive layer, a high polymer material is subjected to hot pressing onto the adhesive layer to form a plastic layer, and the paper-plastic food packaging film is prepared. By means of the adhesive, the paper layer and the high polymer layer can be combined organically to prepare the paper-plastic food packaging film, the paper-plastic food packaging film has excellent stability, and meanwhile, the preparation method has the advantages that the process is simple and raw materials are easy to obtain.

Description

technical field [0001] The invention relates to a paper-plastic food packaging film, in particular to a paper-plastic food packaging film and a preparation method thereof. Background technique [0002] Paper-plastic food packaging film is a material obtained by compounding paper and polymer materials, so that the paper-plastic food packaging film has the properties of both paper and polymer materials. In the process of compounding paper and polymer materials, an adhesive is required, and the adhesive can effectively combine the two organically. The current adhesives can meet the requirements of general paper-plastic food packaging films, but in the case of long service life and harsh conditions (high temperature, humidity), the gap between the paper and the polymer layer in the paper-plastic food packaging film The space is often easy to separate, and then the performance of the paper-plastic food packaging film is greatly reduced. Contents of the invention [0003] The ...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J103/02C09J183/04C09J193/02C09J11/04C09J11/06B32B37/12B32B37/10B32B37/06
CPCB32B37/06B32B37/10B32B37/1284C08K2003/222C08K2003/3045C08K2003/387C08K2201/011C08L2205/035C09J11/04C09J11/06C09J175/04C08L3/02C08L83/04C08L93/02C08L71/02C08K13/02C08K3/30C08K3/38C08K3/22C08K5/05
Inventor 彭姝文
Owner 芜湖市三山区绿色食品产业协会
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