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Composite material for barrier bottle with high barrier property

A composite material and high-barrier technology, applied in the field of materials, can solve the problems of poor processing performance, large proportion requirements, and great influence on moisture resistance performance, and achieve the goal of improving interaction force, improving comprehensive performance, and improving thermal stability. Effect

Active Publication Date: 2012-01-18
SHANGHAI BANZAN MACROMOLECULE MATERIAL
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] However, the hydroxyl groups in EVOH materials are easy to combine with water in the environment to form hydrogen bonds, and their moisture barrier properties are greatly affected by humidity. When the ambient humidity exceeds 50%, the barrier properties of EVOH films deteriorate sharply; and the barrier properties of EVOH are required to be compared. High, the proportion of vinyl alcohol groups in the ethylene-vinyl alcohol copolymer is required to be large, so that the price of EVOH increases accordingly, and with the increase of the proportion of vinyl alcohol groups, its processing performance becomes worse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Nano-SiO 2 Add 100g, 4.5g of silane coupling agent (KH-550) and 300g of acetone into the reaction vessel, heat in a water bath, gradually raise the temperature to 60°C, stir and ultrasonically oscillate, reflux at constant temperature for 30min, suction filter, and wash with absolute ethanol three times , dried to obtain surface-modified nano-SiO 2 .

[0024] 2. The EVOH with a vinyl alcohol content of 58% was vacuum-dried at 60° C. for 48 hours, and the modified nano-silica powder was vacuum-dried at 60° C. for 14 hours. Take 98g of dry EVOH and 2g of modified nano-silica powder, mix and stir evenly at room temperature, then slowly add them into a Thermo Haake rotor type internal mixer, melt and knead for 10min at a temperature of 195°C and a roller speed of 60r / min. The output material in the internal mixer is crushed into granules in the crusher, dried in vacuum at 60°C for 3 hours, and after the material is taken out and granulated, the EVOH / nano-SiO 2 compos...

Embodiment 2

[0028] 1. Nano-SiO 2 Add 100g, 4g of silane coupling agent (KH-550) and 300g of acetone into the reaction vessel, heat in a water bath, gradually raise the temperature to 60°C, stir and ultrasonically oscillate, reflux at constant temperature for 30min, filter with suction, wash with absolute ethanol three times, Drying to obtain surface-modified nano-SiO 2 .

[0029] 2. The EVOH with a vinyl alcohol content of 62% was vacuum-dried at 60° C. for 48 hours, and the modified nano-silica powder was vacuum-dried at 60° C. for 16 hours. Take 99g of dry EVOH and 1g of modified nano-silica powder, mix and stir evenly at room temperature, then slowly add them into a Thermo Haake rotor type internal mixer, melt and knead for 10min at a temperature of 195°C and a roller speed of 60r / min. The output material in the internal mixer is broken into granules in the crusher, dried in vacuum at 60°C for 4 hours, and after taking the material and granulating, the EVOH / nano-SiO 2 composite mat...

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Abstract

The invention belongs to the field of the material, specifically relates to a composite material for a barrier bottle with high barrier property. The composite material is characterized in that: the preparation method for the composite material comprises the following three processes: 1, adopting a silane coupling agent to carry out a modification treatment for a nano-silicon dioxide powder material; 2, adopting a Thermo Haake rotor type mixer to carry out melting and blending to prepare a EVOH / nano-SiO2 composite material; 3, carrying out an ultraviolet irradiation treatment for the resulting composite material. The silane coupling agent is KH-550. The ethenol content in the EVOH is 56-60%. In the preparation method for the composite material, the use amount of the modified nano-SiO2 particles is 1-2% of the mass of the system. According to the present invention, the characteristics of susceptibility to the humidity of the EVOH material is improved; the prepared EVOH / nano-SiO2 composite material has good barrier property, good mechanical property and good heat stability, and is applicable for the material for packaging the barrier bottle.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a composite material for barrier bottles with barrier properties. Background technique [0002] Products are often damaged and affected by various unfavorable factors during storage, transportation and other circulation processes. The use of reasonable packaging can protect products from or reduce these effects. Packaging products with high-barrier materials can control the gas composition and content in the package, thereby effectively extending the shelf life of products. Therefore, high-barrier materials have become one of the most important functional packaging materials. [0003] EVOH is a material that combines the ease of processing of ethylene polymers with the barrier properties of polyvinyl alcohol. The most notable feature of EVOH is its barrier effect on gas, which can effectively prevent the penetration of oxygen, carbon dioxide and other gases. The gas barrier ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K9/06C08K3/36C08J3/28
Inventor 毕宏海储江顺彭艳华毕宏清汪丽毕宏俊欧阳贵郑飞燕薛明跃高志勇梅晓星
Owner SHANGHAI BANZAN MACROMOLECULE MATERIAL
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