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Oxygen uptake polyester composite material for packaging with isolation performance and method for producing the same

A technology for polyester composite materials and packaging, applied in the field of polyester composite materials, can solve the problems of low catalytic efficiency, uneven distribution, low solubility, etc., achieve excellent gas barrier performance, improve catalytic efficiency, and reduce usage Effect

Active Publication Date: 2011-11-16
CHINA RESOURCES PACKAGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of oxygen absorbing agent utilizes the principle that olefins can be catalyzed and oxidized into epoxy to achieve the effect of oxygen absorption, and the oxygen absorption effect is better. However, there are also some obvious defects: first, the extremely high density of polybutadiene low solubility in the terephthalic acid-ethylene glycol system, poor compatibility, and difficult to evenly distribute, thereby affecting the oxygen absorption effect; second, the transition metal catalyst is added to the Among the organic monomers, there are also problems of poor compatibility and uneven distribution, and the dosage is large, the catalytic efficiency is not high, and the metal ions are easy to migrate. At the same time, the excessive metal ion content will make the color value of the polymer higher.

Method used

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  • Oxygen uptake polyester composite material for packaging with isolation performance and method for producing the same
  • Oxygen uptake polyester composite material for packaging with isolation performance and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Example 1, the preparation method of self-catalyzed oxygen scavenger, its steps are as follows:

[0028] (1) Add 500g of butadiene monomer to neutralize 5g of dibenzoyl peroxide in a 1-liter three-neck flask, stir mechanically, slowly rise to 80°C over 30 minutes and keep it warm to allow it to undergo polymerization for 60 minutes; After the reaction finishes, the unreacted butadiene is separated and recovered through flash evaporation and compression, and the polymer-containing feed liquid is left to stand at 40° C. for 10 hours, then washed 3 times with an aqueous solution of sodium hydroxide with a concentration of 15% by weight, and then Wash 2 times with deionized water; then dry the feed liquid in a fluidized bed drier to obtain 450g of polybutadiene liquid polymer, the temperature is 120°C, and the drying time is 10 hours; the yield reaches 90%, 1, 2 The polymerized structural units account for about 10% of the total polymerized units, and the relative molecular...

example 2

[0033] On the technical PET production line of Italy NOY engineering company, increase the liquid metering pump; The main body PET is the bottle-grade polyester product produced by the national standard of bottle-grade polyester, and the self-catalyzed oxygen scavenger and 2,6-naphthalene obtained in example 1 Diformic acid is added to the mixing tank, mixed evenly under the protection of nitrogen, and fully mixed with the main PET melt in the static mixer after passing through the filter, metering pump and three-way valve; the mixed melt is then filtered through the melt After being filtered by a granulator, the oxygen-absorbing polyester composite material for barrier packaging is obtained by cooling and granulating by a granulator; the metering pump measures so that the content of the self-catalyzed oxygen scavenger added in the entire material is 1.1% by weight, 2,6-naphthalene The content of the added amount of diformic acid in the whole material was 0.5% by weight.

example 3

[0035] On the PET production line, add liquid metering pumps. The main body PET is a bottle-grade polyester product produced according to the national standard of bottle-grade polyester. Add the self-catalyzed oxygen scavenger and 2,6-naphthalene dicarboxylic acid prepared in Example 1 into the mixing tank, mix evenly under nitrogen protection, After passing through a filter, a metering pump, and a three-way valve, it is fully mixed with the main PET melt in a static mixer. The mixed melt is filtered through a melt filter, and then cooled and pelletized by a pelletizer to obtain an oxygen-absorbing polyester composite material for barrier packaging; the metering pump is used to measure the content of the self-catalyzed oxygen scavenger in the entire material. The amount of 2,6-naphthalene dicarboxylic acid added was 3% by weight, so that the content of the entire material was 1.0% by weight.

[0036] The oxygen-absorbing polyester composite material for barrier packaging obta...

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Abstract

The present invention relates to an oxygen-absorption polyester composite used for barrier package. The oxygen-absorption polyester composite is characterized by comprising bottle grade polyester and autocatalytic deoxidant; the content of the bottle grade accounts for 90-99.9 weight percent in the whole composite; the content of the autocatalytic deoxidant accounts for 0.1-10 weight percent in the whole composite; a general structural formula of the autocatalytic deoxidant is formula I; in the formula, x, y and z are 5 to 40; and M<+> is Cu<2+>, Co<2+>, Ni<2+>, Mn<2+>, Fe<2+>, Cr<3+> or Zn<2+>. The present invention also relates to a method for preparing the oxygen-absorption polyester composite used for the barrier package. The invention has the advantages of high oxygen absorbability, low using quantity of transition metal ion in polyester package material, the more uniform distribution and better stability of a catalyst in the polyester package material, and difficulty in transferring.

Description

1. Technical field [0001] The invention relates to a polyester composite material, in particular to an oxygen-absorbing polyester composite material for barrier packaging and a preparation method thereof. 2. Background technology [0002] Polyester is a general term for thermoplastic linear saturated polyester represented by polyethylene terephthalate (PET). One of its important uses is in the field of packaging. When used as a packaging material, PET can be made into a biaxially stretched packaging film, and a high-strength, high-transparency stretched blow-molded bottle can be obtained from an amorphous preform, and it can also be directly extruded or blown into a non-stretched hollow container. PET products are transparent, oil-resistant, fragrant, hygienic and reliable, and have a wide range of operating temperatures, so their usage in the packaging field continues to grow. [0003] As we all know, beer, juice, milk and energy foods are very sensitive to oxygen, so the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08L67/02C08L47/00C08F136/06C08F8/44C08F8/46B29B9/02
Inventor 朱振达宗建平傅伟铮陈小雷陈旭徐梅
Owner CHINA RESOURCES PACKAGING MATERIALS CO LTD
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