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High-bonding-strength barrier packaging plastic film for food and preparing method thereof

A packaging plastic and strength technology, applied in the field of food packaging materials, can solve the problems of affecting the barrier performance and service life of packaging films, weak bonding between layers, and low strength of packaging films, so as to achieve good product safety performance and low cost. Low, good mechanical properties

Inactive Publication Date: 2018-06-22
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the food packaging plastic film in the prior art adopts a multi-layer composite structure to achieve the purpose of high barrier technology, and the bonding effect between the layers is not strong, resulting in low strength and poor mechanical properties of the packaging film, which seriously affects the Barrier properties and service life of packaging films

Method used

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  • High-bonding-strength barrier packaging plastic film for food and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 3kg of phosphorus oxychloride with 97kg of cornstarch, adjust the pH value to 10, raise the temperature to 36°C for 140min for cross-linking modification, and obtain cross-linking modified starch; then add 15kg of cations to 33kg of modified starch Carboxymethylcellulose sodium and 8kg sodium alginate were mixed evenly, then 42kg distilled water and 2kg alkylphenol polyoxyethylene ether were added and stirred for 72min to obtain a completely dissolved uniform pre-film solution; then 44kg pre-formed The film liquid is cast to form a film at a film-forming line speed of 1.8m / s, and the average thickness of the film is 0.03mm, and then 16kg of apple pectin is added to 40kg of epoxy acrylate monoester-modified carboxyl-terminated polyamide to make a slurry material, and coated on the surface of the casting film, and then rapidly hot-pressed and dried and compounded under the conditions of a pressure of 7 MPa and a temperature of 255 ° C, to obtain a barrier packaging pla...

Embodiment 2

[0036]Mix 4kg of sodium trimetaphosphate with 96kg of wheat starch, adjust the pH to 9, raise the temperature to 32°C for 145min for cross-linking modification, and obtain cross-linking modified starch; then add 12kg of cations to 32kg of modified starch Carboxymethylcellulose sodium and 6kg sodium alginate were mixed uniformly, then 49kg distilled water and 1kg alkylphenol ether sulfosuccinate sodium salt were added and stirred for 65min to obtain a completely dissolved uniform pre-film solution; then 51kg of preformed film liquid is cast to form a film at a film forming line speed of 1.6m / s, and the average thickness of the film is 0.028mm, and then 13kg of apple pectin is added to 36kg of epoxy acrylate monoester modified carboxyl-terminated polyamide Slurry was prepared in the medium, and coated on the surface of the casting film, and then quickly hot-pressed and dried and compounded under the conditions of pressure of 6 MPa and temperature of 245 ° C, to obtain a barrier p...

Embodiment 3

[0039] Mix 4kg citric acid with 96k sweet potato starch, adjust the pH value to 11, raise the temperature to 38°C for 125min for cross-linking modification, and obtain cross-linked modified starch; then add 16kg cationic carboxylate to 34kg modified starch Sodium methylcellulose and 8kg sodium alginate were mixed evenly, then 39kg of distilled water and 3kg of octylphenyl polyoxyethylene ether were added and stirred for 75min to obtain a completely dissolved uniform pre-film solution; then 37kg of pre-film The liquid is cast to form a film at a film-forming line speed of 1.9m / s, and the average thickness of the film is 0.035mm, and then 17kg of apple pectin is added to 46kg of carboxyl-terminated polyamide modified by epoxy acrylate monoester to make a slurry , and coated on the surface of the cast film, and then quickly hot-pressed and dried and compounded under the conditions of a pressure of 7 MPa and a temperature of 255 ° C, to obtain a barrier packaging plastic film for f...

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Abstract

The invention belongs to the technical field of food packaging materials, and provides high-bonding-strength barrier packaging plastic film for food and a preparing method thereof. The preparing method comprises the steps of firstly, preparing crosslinking modified starch, then mixing the modified starch with cationization sodium carboxymethylcellulose, sodium alginate, emulgator and water to be prepared into film-forming liquid, flow-casting the film-forming liquid into film, then coating the surface of the cast film with polyamide which contains apple pectin and can be dispersed by water, and preparing the high-bonding-strength barrier packaging plastic film for food through quick hot-press drying compounding. Compared with a traditional method, the bonding strength of compound layers ofthe plastic film is high, the mechanical performance is good, the barrier effect of water and gas is good, and the service life is long; meanwhile, the preparing technology is simple, the cost is low, the product safety is high, and the plastic film can be widely applied to food packaging.

Description

technical field [0001] The invention belongs to the technical field of food packaging materials, and provides a barrier packaging plastic film with high adhesive strength for food and a preparation method thereof. Background technique [0002] In the 21st century, plastic packaging materials will continue to grow steadily, and will still be full of vitality in the field of packaging materials, and will continue to play an active role in protecting commodities and improving commodity value. As environmental issues become more and more important and resources and energy become more tense, plastic packaging materials will usher in new opportunities and also face severe challenges. In order to meet the requirements of the new era, plastic packaging materials are developing in the direction of high performance, multi-functionality, environmental protection adaptability, the use of new raw materials, new processes, new equipment, and broadened application fields. In particular, t...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08L3/04C08L1/28C08L5/04C08J5/18C08B31/00B65D65/42
CPCB65D65/42B65D2565/381C08B31/003C08J5/18C08J7/0427C08J2303/04C08J2401/28C08J2405/06C08L3/04C08L2201/14C08L2205/035C08L1/286C08L5/04Y02A40/90Y02W90/10
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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