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Binder for paper-plastic food packaging film and preparation method thereof

A food packaging film and adhesive technology, applied in the direction of adhesive types, shellac adhesives, starch adhesives, etc., can solve problems such as performance degradation of paper-plastic food packaging films

Inactive Publication Date: 2017-09-22
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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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] The invention provides a method for preparing an adhesive for paper-plastic food packaging film, including:

[0013] 1) Ball mill starch, silica gel, shellac and polyoxyethylene sorbitan fatty acid ester to obtain a mixture;

[0014] 2) Gelatinize the mixture with water to obtain a gelatinized product;

[0015] 3) The polyurethane, sulfate, borate, nano-magnesium oxide, water, ethanol, toluene and gelatinized product are subjected to ultrasonic vibration to prepare an adhesive for paper-plastic food packaging film.

[0016] In step 1) of the above preparation method, the amount of each material can be selected in a wide range, but in order to make the prepared adhesive have more excellent performance, preferably, in step 1), starch, silica gel, The weight ratio of shellac and polyoxyethylene sorbitan fatty acid ester is 100:65-80:22-35:4-8.

[0017] In step 1) of the above preparation method, the specific conditions of ball milling can be selected in a wide range, but in order t...

Embodiment 1

[0028] 1) Ball mill starch, silica gel, shellac and polyoxyethylene sorbitan fatty acid ester in a weight ratio of 100:70:28:6 (the mass ratio of large balls to small balls is 2:1.4, and the grinding balls are The mass ratio of the materials is 10:4, the rotating speed is 1800rpm, and the ball milling time is 30min) to obtain the mixture (average particle size is 0.3μm);

[0029] 2) Gelatinize the mixture and water at a weight ratio of 100:200 at 70°C for 20 hours to obtain a gelatinized product;

[0030] 3) Polyurethane (weight-average molecular weight is 1800), sulfate, borate, nano-magnesium oxide (average particle size is 3nm), water, ethanol, toluene and gelatinized products according to 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 adhesive A1 for paper-plastic food packaging film.

Embodiment 2

[0032] 1) Ball mill starch, silica gel, shellac and polyoxyethylene sorbitan fatty acid ester in a weight ratio of 100:65:22:4 (the mass ratio of large balls to small balls is 2:1.3, and the grinding balls are The mass ratio of the materials is 10:0.8, the rotating speed is 1500rpm, and the ball milling time is 25min) to obtain the mixture (average particle size is 0.2μm);

[0033] 2) Gelatinize the mixture and water at a weight ratio of 100:180 at 65°C for 12 hours to obtain a gelatinized product;

[0034] 3) Polyurethane (weight average molecular weight is 1500), sulfate, borate, nano-magnesium oxide (average particle size is 1nm), water, ethanol, toluene and gelatinized products according to 100:4:1.5:15:40: The weight ratio of 50:60:45 was ultrasonically oscillated at 40°C for 2h to prepare adhesive A2 for paper-plastic food packaging film.

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Abstract

The invention discloses a binder for a paper-plastic food packaging film and a preparation method thereof. The preparation method comprises 1) carrying out ball milling on starch, silica gel, shell-lac and polyoxyethylene sorbitan fatty acid ester to obtain a mixture, 2) carrying out gelatinization on the mixture and water to obtain a gelatinization product, and 3) carrying out ultrasonic concussion on polyurethane, a sulfate, a borate, nano-magnesium oxide, water, ethanol, toluene and the gelatinization product to obtain the binder for a paper-plastic food packaging film. The binder can bond a paper layer and a polymer layer so that a paper-plastic food packaging film is obtained. The paper-plastic food packaging film has excellent stability. The preparation method has the characteristics of simple processes and easy availability of raw materials.

Description

Technical field [0001] The invention relates to a paper-plastic food packaging film, in particular to an adhesive used for the 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 paper and polymer materials at the same time. In the process of combining paper and polymer materials, an adhesive is required, which in turn can effectively combine the two organically. The current adhesives can meet the requirements of general paper-plastic food packaging films, but in some cases with long service cycles and harsh conditions (high temperature, humidity), the paper and polymer layers in paper-plastic food packaging films The space is often easy to separate, thereby greatly reducing the performance of the paper-plastic food packaging film. Summary of the invention [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J103/02C09J193/02C09J171/02C09J11/04
Inventor 彭姝文
Owner 芜湖市三山区绿色食品产业协会
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