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Coating liquid for preparation of high barrier milk packaging film as well as preparation method and application thereof

A technology of packaging film and coating liquid, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems affecting the application range of high-barrier layers, and achieve the effects of stable liquid viscosity, preservation of fragrance shelf life, and extended shelf life.

Inactive Publication Date: 2011-06-01
NO 8511 RES INST OF CASIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for obtaining a certain water resistance of PVA generally involve aldehydes, and the residual aldehydes greatly affect the application range of the high barrier layer

Method used

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  • Coating liquid for preparation of high barrier milk packaging film as well as preparation method and application thereof
  • Coating liquid for preparation of high barrier milk packaging film as well as preparation method and application thereof
  • Coating liquid for preparation of high barrier milk packaging film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Table 1 The distribution ratio of each component of PVA high barrier coating liquid

[0017]

[0018] The proportion of PVA high-barrier coating solution is shown in Table 1. The preparation process is: add 0.5 parts of butanol to 100 parts of 10% PVA aqueous solution, stir well; then slowly add 50 parts of 5% Al under rapid stirring. 2 o 3 Sol, keep stirring for 2h; then slowly add 20 parts of 10% SiO 2 Sol, continue stirring for 0.5h; finally add 30 parts of water and stir evenly; the temperature in the whole process is controlled at about 25°C. The coating liquid obtained by the above method is a mixture.

[0019] Pour the above-mentioned high-barrier coating solution on a clean and flat stainless steel tray, place it in a vacuum oven at 45°C, and dry it. After the water is fully evaporated, place the film in an oven at 75°C for heat treatment for 2 hours, and peel it off to obtain Modified PVA film.

[0020] Table 2 Water resistance of modified PVA film

[0...

Embodiment 2

[0027] Table 4 The distribution ratio of each component of PVA high barrier coating solution

[0028]

[0029] The proportion of PVA high-barrier coating solution is shown in Table 4. The preparation process is: add 0.5 parts of butanol to 100 parts of 10% PVA aqueous solution, stir well; then slowly add 30 parts of 5% Al under rapid stirring. 2 o 3 Sol, keep stirring for 2h; then slowly add 20 parts of 10% SiO 2 Sol, continue to stir for 0.5h; finally add 50 parts of water and stir evenly; the temperature in the whole process is controlled at about 25°C.

[0030] Pour the above-mentioned high-barrier coating solution on a clean and flat stainless steel tray, place it in a vacuum oven at 45°C, and dry it. After the water is fully evaporated, place the film in an oven at 75°C for heat treatment for 2 hours, and peel it off to obtain Modified PVA film.

[0031] Table 5 Water resistance of modified PVA film

[0032]

[0033] After modification, the water resistance of t...

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Abstract

The invention discloses a coating liquid for the preparation of a high barrier milk packaging film as well as a preparation method and an application thereof. The coating liquid is prepared by mixing polyvinyl alcohol (PVA), a stickiness regulator, a dispersant, water and a waterproof modifier. The preparation method of the high barrier milk packaging film comprises the following steps: evenly coating the prepared coating liquid on a polyethylene (PE), polypropylene (PP), polyamide (PA) or polyethylene terephthalate (PET) plastic film, drying, reeling and curing in a curing chamber of 45 DEG C. As the coating liquid in the invention does not contain toxic substances and has no penetrating odor, the coating liquid can be used for food packaging; as the coating liquid is transparent and has stable viscosity, the high barrier film prepared from the coating liquid is suitable for color printing, dry laminating and long-term storage and transportation; and as the coating film prepared from the coating liquid has high oxygen resistance, the high barrier packing material prepared from the oating liquid has the functions of retaining freshness, retaining aroma and prolonging the shelf life of the product.

Description

technical field [0001] The invention belongs to a safe and non-toxic high-barrier coating liquid, in particular to a coating liquid for making a high-barrier milk packaging film, a preparation method and an application. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble polymer with excellent performance and wide application. Its main chain contains a large number of hydroxyl groups, and its structural formula is (-CH 2 CHOH-) n . Due to the small volume of the side groups 3 / H and 3 / OH, they can enter the crystallization point without causing stress, so they have a high degree of crystallinity, which makes the gas permeability of PVA very small. The film prepared from it has excellent oxygen resistance, oil resistance, abrasion resistance, tear resistance, transparency, antistatic property, printability, chemical corrosion resistance, etc., and is biodegradable under certain conditions , occupies a unique and very important position in thin film mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04C09D7/12C08J7/04B65D65/42
Inventor 刘飞全胡焱清李子繁孙红旗周琦
Owner NO 8511 RES INST OF CASIC
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