A kind of preparation method of oxygen barrier type PET bottle and product thereof

An oxygen barrier and product technology, which is applied in the field of preparation of oxygen barrier PET bottles, can solve the problems of difficult surface modification of nano-powders, complicated processes, poor compatibility, etc., and achieves elimination of hidden dangers of filler migration and stable chemical properties. , The effect of improving the barrier performance

Active Publication Date: 2022-01-21
嘉禾伍丰(河北)包装科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the potential risk of nanofillers migrating from packaging materials to food also greatly limits the application of this technology in oxygen barrier PET bottles
[0010] For the "multi-layer composite" and "coating coating" methods mentioned above, there are mainly disadvantages such as complex process, high cost, and products that cannot be recycled and reused.
For the existing "inorganic filler modification" method, the main disadvantages are: (1) commonly used nano fillers are mostly spherical or quasi-spherical. In order to achieve a better oxygen barrier effect, a high proportion of nano fillers needs to be added, resulting in PET bottles The mechanical properties are reduced; while the use of sheet-shaped nano-fillers such as montmorillonite can theoretically reduce the amount of fillers, but they are difficult to effectively disperse and orientate in PET, resulting in poor barrier effect
(2) It is difficult to modify the surface of nano-powders, and poor compatibility can easily lead to defects in the organic / inorganic two-phase interface, reducing the barrier effect
(3) For food packaging materials made of ordinary nanofillers and PET substrates, there is a risk of nanofillers and their metal elements migrating to food during use

Method used

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  • A kind of preparation method of oxygen barrier type PET bottle and product thereof
  • A kind of preparation method of oxygen barrier type PET bottle and product thereof
  • A kind of preparation method of oxygen barrier type PET bottle and product thereof

Examples

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preparation example Construction

[0038] The present invention relates to a kind of preparation method of oxygen barrier type PET bottle, and described method step is as follows:

[0039] (1) First, add an appropriate amount of flaky alumina to deionized water, ultrasonically disperse and then filter with suction; then add ethylene glycol to the filtered flaky alumina, stir and then filter with suction, and repeat this operation 2-3 times;

[0040] The flaky alumina is artificially synthesized; its structural feature is α-phase single-crystal alumina; its morphological feature is that the single-sheet diameter ranges from 5-30 μm and its thickness ranges from 100-400 nm;

[0041] (2) adding the water-dispersed and alcohol-substituted flaky alumina into the alcohol mixture, heating and refluxing in a water bath to react, and obtaining a surface-modified flaky alumina-alcohol mixed suspension;

[0042] (3) Add terephthalic acid, flaky alumina-alcohol mixture, and ethylene glycol antimony to the reactor successiv...

Embodiment 1

[0052] A preparation method of an oxygen barrier type PET bottle, the steps are as follows:

[0053] (1) First, add an appropriate amount of flaky alumina into a beaker filled with 10 times the mass of deionized water, use an ultrasonic disperser to disperse for 20 minutes, and then suction filter; then add 3 times the mass of ethylene glycol to the filtered flaky alumina Alcohol, after electric stirring at 200r / min speed for 10min, suction filtration, repeat this operation 2-3 times;

[0054] (2) Add water-dispersed and alcohol-substituted flaky alumina to 4 times the mass of the alcohol mixture, heat and reflux in a water bath at 90°C for 1 hour to obtain a surface-modified flaky alumina-alcohol mixed suspension ;

[0055] The alcohol mixture comprises ethylene glycol and polyethylene glycol, wherein the mass ratio content of ethylene glycol is 97%, and the mass ratio content of polyethylene glycol is 3%. The polyethylene glycol is polyethylene glycol 400.

[0056] (3) Ad...

Embodiment 2

[0060] (1) First, add an appropriate amount of flaky alumina into a beaker with 8 times the mass of deionized water, disperse it with an ultrasonic disperser for 10 minutes, and then filter it with suction; then add 2 times the mass of ethylene glycol to the filtered flaky alumina Alcohol, after electric stirring at 50r / min speed for 5min, suction filtration, repeat this operation 2-3 times;

[0061] (2) Add water-dispersed and alcohol-substituted flaky alumina to 3 times the mass of alcohol mixture, heat and reflux in a water bath at 95°C for 0.5h to obtain a surface-modified flaky alumina-alcohol mixed suspension liquid;

[0062] The alcohol mixture comprises ethylene glycol and polyethylene glycol, wherein the mass ratio content of ethylene glycol is 99%, and the mass ratio content of polyethylene glycol is 1%. The polyethylene glycol is polyethylene glycol 1000.

[0063] (3) Add 100 parts of refined terephthalic acid, 70 parts of flaky alumina-alcohol mixed solution, and...

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Abstract

The invention provides a method for preparing an oxygen-barrier PET bottle and its product. The method is as follows: add the flake alumina after water dispersion and alcohol replacement into the alcohol mixture, heat and reflux in a water bath to obtain surface-modified Flaky alumina-alcohol mixed suspension; stir terephthalic acid, flake alumina-alcohol mixed solution, and ethylene glycol antimony under nitrogen protection and then react; after the reaction, turn on the vacuum pump to discharge ethylene glycol; When the molecular weight of the product increases to the target value, the materials in the reactor are extruded with nitrogen, cooled and granulated to obtain flaky alumina / PET modified masterbatch; pure PET resin pellets and flaky alumina / PET modified Mix the permanent masterbatch to form a blend, injection mold it into a preform, and then blow mold it to obtain a flaky alumina / PET bottle product. The product produced by the invention has stable mechanical properties and high-efficiency oxygen barrier properties, can eliminate the hidden danger of fillers migrating to food; and has single components, can be recycled without separation, has low recycling cost and meets environmental protection requirements.

Description

【Technical field】 [0001] The invention relates to the field of polymer materials, in particular to a method for preparing an oxygen barrier PET bottle. 【Background technique】 [0002] Compared with traditional aluminum cans or glass bottles, polyester (PET) bottles are used to manufacture various liquid food packaging containers because of their good overall performance and high cost performance, but they also have gas barrier properties (especially oxygen barrier properties) poor deficiency. At present, the resinization of beverage packaging materials such as fruit juice, wine, chocolate milk, etc. has become a common trend. However, most of these beverages are oxygen-sensitive beverages. Even a small amount of oxygen infiltrating into the packaging container will change the taste and aroma of the beverage. This puts forward higher requirements for the gas barrier performance of PET bottles for food packaging, especially the oxygen barrier performance. Require. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K9/04C08K9/08C08K7/00C08K3/22C08G63/183C08G63/86
CPCC08L67/02C08G63/183C08G63/866C08L2205/025C08L2203/10C08K2003/2227C08K2201/003C08K9/04C08K9/08C08K7/00C08K3/22
Inventor 吴华忠方润马良张于弛陈为健
Owner 嘉禾伍丰(河北)包装科技有限公司
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