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Single-layer and transparent high-impedant composite materials terephthalate product swith polyethylene glycol

A technology of polyethylene terephthalate and composite materials, which is applied in the field of polyethylene terephthalate composite products, can solve the problems of difficulty in product recycling, loss of PET transparency, poor barrier properties, etc. Ease of processing and recycling, the effect of good barrier properties

Inactive Publication Date: 2006-08-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its poor barrier properties, the promotion and application of PET in the field of packaging, especially the field of beer packaging, is limited.
In the existing research and patents, there are generally two problems in the technology of improving the barrier property of PET: one is that although the barrier property is improved, the transparency of PET is lost, such as prepared by blending or using additives. PET composite materials; the second is to use a multi-layer method, such as adding a barrier layer in a PET bottle, or using a surface coating method (using physical or chemical deposition to obtain a barrier coating). Although this method can also improve the barrier property, at the same time The transparency is maintained, but the processing technology is complicated, the product recycling is difficult, and the cost is relatively high, which has become the bottle diameter for large-scale promotion and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the silica sol system (silicon dioxide accounts for 30wt% of the total amount of the sol, the particle size is approximately normal distribution between 1nm and 50nm, and the solvent is ethylene glycol), add 0.01wt% of the total amount of the sol product PEG (average molecular weight: 4000) was heated and stirred at normal pressure at 60° C., refluxed, and taken out after 1 to 2 hours to obtain a stable silica sol.

[0029] Add ethylene glycol, terephthalic acid and silica sol into the reactor for esterification reaction, and then undergo low-vacuum polycondensation reaction and high-vacuum polycondensation reaction to obtain transparent polyethylene terephthalate composite material ;in:

[0030] In the esterification reaction stage of polyethylene terephthalate, add the above-mentioned silica sol accounting for 1wt% of the total weight of the reaction mixture; 1 to 2 hours. The product of the above-mentioned esterification process is then subjected to a polyconden...

Embodiment 2

[0034] In the silica sol system (silicon dioxide accounts for 30wt% of the total amount of the sol, the silica particle size is approximately normal distribution between 5nm and 1um, and the silica with a particle size greater than 760nm accounts for the total amount of nano oxides. Below 5%, solvent is ethylene glycol) and add the PEG (average molecular weight is 200) that accounts for sol product total amount 2wt% and the PVA (average polymerization degree is 1000) that accounts for sol product total amount 0.1wt%, in normal pressure , heated and stirred at 60° C., refluxed, and taken out after 1 to 2 hours to obtain a stable silica sol.

[0035] In the esterification process stage of producing PET, 50 wt% of the above-mentioned silica sol is added, accounting for the total weight of the reaction mixture. Wherein, the esterification reaction temperature is 220-240° C., the reaction pressure is 0.2-0.25 MPa, and the reaction time is 1.5-2 hours. The product of the above-ment...

Embodiment 3

[0039] In the zirconia sol system (zirconium dioxide accounts for 20wt% of the total amount of sol, the particle size of zirconia is approximately normal distribution between 10nm and 800nm, and zirconia with a particle size greater than 760nm accounts for the total amount of nano oxides 1% or less, the solvent is ethylene glycol), adding PEG (average molecular weight is 8000) accounting for 5wt% of the total amount of the sol product, heated and stirred at normal pressure and 50°C, refluxed, and taken out after 1 to 2 hours to obtain Stabilized zirconia sol.

[0040] In the esterification process stage of producing PET, add the above-mentioned zirconium dioxide sol accounting for 20wt% of the total weight of the reaction mixture, wherein the esterification reaction temperature is 210-230°C, the reaction pressure is 0.25-0.6MPa, and the reaction time is 1.5-2 hours . The product of the above-mentioned esterification process is then subjected to a polycondensation process to o...

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Abstract

A single-layer transparent product of polyethylene basic formate glycol ester composite material consists of polyethylene basic formate glycol ester, inorganic nanometer oxide 0.05~20wt% and polymer compound stabilizer 0.0001~3.5wt%, granular diameter is 1nm~1um and inorganic nanometer oxide of granular diameter >760nm accounts below total 5%. The products can be bottles, membranes, bags, cases or pots and has excellent block performance.

Description

technical field [0001] The invention relates to a polyethylene terephthalate (PET) composite material product, in particular to a polyethylene terephthalate (PET) composite product made of polyethylene terephthalate, inorganic nano-oxides and polymer compound stabilizers. Single-layer, transparent PET composite products with high barrier properties. Background technique [0002] At present, the application range of plastic containers in the packaging market has been quite broad. For example, plastic containers have already occupied half of the packaging market for carbonated beverages and drinking water; in the fruit juice beverage market, the market share of plastic containers and paper composite containers is not the same. up and down. Due to the unique advantages of plastic containers such as light weight, good toughness, large volume, and easy to be made into various shapes and specifications, its application field has gradually expanded, and now it has squeezed into th...

Claims

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Application Information

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IPC IPC(8): C08L67/03C08K3/22C08G63/78B29C49/28
Inventor 张野杜善义周品章赵臻璐史君王小群吴传祥韦第升夏秀丽王晨
Owner PETROCHINA CO LTD
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