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Preparation method of high-toughness anti-aging heat shrinkable film

A heat-shrinkable film and anti-aging technology, applied in the field of preparation of high-toughness and anti-aging heat-shrinkable films, can solve the problems of easy aging, insufficient toughness, low tensile strength of heat-shrinkable films, etc., to enhance structural strength, improve toughness and Mechanical strength, the effect of improving structural strength

Pending Publication Date: 2020-08-04
杨灿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention: Aiming at the defects of low tensile strength, insufficient toughness and easy aging of the current heat shrinkable film, a preparation method of high toughness and anti-aging heat shrinkable film is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of mixed reaction solution:

[0036] Put soybean meal and ramie into a vacuum drying oven at a mass ratio of 5:1, dry for 10 hours at a vacuum of 100 Pa and a temperature of 30°C, and put them into a planetary ball mill after drying at a speed of 120r / min and a ball-to-material ratio of Grind the mixture for 60 minutes under the condition of 10:1 to prepare the mixture, put the mixture and hydrochloric acid with a mass fraction of 6% into the beaker at a mass ratio of 1:10 and mix evenly to obtain a mixed reaction solution;

[0037] Preparation of the dispersion:

[0038] Add 8% hydrochloric acid with a mass fraction of 10% of the mass of the mixed reaction solution dropwise into the above beaker, stir with a stirrer at a speed of 350r / min for 30 minutes to obtain an acidic mixed solution, and add 2% of the mass of the acidic mixed solution to the beaker. Aluminum powder, place the beaker in an ultrasonic oscillator, vibrate for 2 hours at a frequency of 32...

Embodiment 2

[0048] Preparation of mixed reaction solution:

[0049] Put soybean meal and ramie into a vacuum drying oven at a mass ratio of 5:1, dry for 11 hours at a vacuum degree of 125 Pa and a temperature of 35°C, and put them into a planetary ball mill after drying at a speed of 135 r / min and a ball-to-material ratio of Grind the mixture for 70 minutes under the condition of 10:1 to prepare the mixture, put the mixture and hydrochloric acid with a mass fraction of 8% into the beaker at a mass ratio of 1:10 and mix evenly to obtain a mixed reaction solution;

[0050] Preparation of the dispersion:

[0051] In the above-mentioned beaker, add dropwise the hydrochloric acid with a mass fraction of 11% of the mass of the mixed reaction solution of 9%, stir with a stirrer at a speed of 375r / min for 35min to obtain an acidic mixed solution, and add 3% of the mass of the acidic mixed solution to the beaker. Aluminum powder, place the beaker in an ultrasonic oscillator, vibrate for 2.5h at a...

Embodiment 3

[0061] Preparation of mixed reaction solution:

[0062] Put soybean meal and ramie into a vacuum drying oven at a mass ratio of 5:1, dry for 12 hours at a vacuum degree of 150Pa and a temperature of 40°C, and put them into a planetary ball mill after drying at a speed of 150r / min and a ball-to-material ratio of Grind the mixture for 80 minutes under the condition of 10:1 to prepare the mixture, put the mixture and hydrochloric acid with a mass fraction of 10% into the beaker at a mass ratio of 1:10 and mix evenly to obtain a mixed reaction solution;

[0063] Preparation of the dispersion:

[0064] In the above beaker, add dropwise 12% of the mixed reaction solution mass fraction of 10% hydrochloric acid, stir with a stirrer at a speed of 400r / min for 40min to prepare an acidic mixed solution, and add 4% chlorine in the acidic mixed solution to the beaker. Aluminum powder, place the beaker in an ultrasonic oscillator, vibrate for 3 hours at a frequency of 36kHz to prepare a di...

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Abstract

The invention belongs to the technical field of packaging material preparation, and particularly relates to a preparation method of a high-toughness anti-aging heat shrinkable film. The preparation method comprises the following steps: drying and grinding soybean meal and ramie; grinding and mixing with hydrochloric acid to obtain a mixed reaction solution; adding hydrochloric acid into the mixedreaction solution; adding aluminum chloride, oscillating and mixing to obtain dispersion liquid; dropwise adding a sodium carbonate solution into the dispersion liquid, and carrying out a high-temperature and high-pressure reaction to obtain heat treatment reaction liquid; mixing the heat treatment reaction solution with a sulfuric acid solution; after mixing, adding ammonium persulfate and continuously stirring to prepare an oxidation reaction solution; then concentrating the oxidation reaction liquid; adjusting the pH value to obtain a mixture, and heating the mixture at high temperature toobtain a modified binder; finally, mixing the modified binder, resin and other raw materials, and extruding in an extruder and performing casting piece stretching to obtain the high-toughness anti-aging heat shrinkable film. The high-toughness anti-aging heat shrinkable film prepared through the method is good in tensile strength, good in toughness, low in heat shrinkage rate and not prone to aging and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of packaging material preparation, and in particular relates to a preparation method of a high-toughness aging-resistant heat-shrinkable film. Background technique [0002] The double-layer low-temperature environmental protection heat shrinkable film adopts a three-layer structure of A / B / A, the surface layer A is made of linear low-density polyethylene and other additives, and the middle layer B is made of propylene copolymer. Compared with the traditional A / B / C structure or A / B / A structure heat-shrinkable film, firstly, the material of A and C layer is propylene copolymer and other additives, and the material of B layer is linear low density polyethylene. Secondly, the double-height low-temperature environmental protection heat shrinkable film has lower heat shrinkable packaging temperature, higher transparency, high shrinkage rate, high toughness and high heat sealing performance. [0003] Shuanghe low-t...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L23/06C08L97/02C08L89/00C08K13/02C08K3/22
CPCC08J5/18C08J2323/06C08J2423/06C08J2489/00C08J2497/02C08K13/02C08K2003/2227C08K2201/011
Inventor 杨灿
Owner 杨灿
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