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Production method for co-blending-method high-barrier-property polypropylene packaging film

A technology with high barrier property and production method, which is applied in the field of packaging materials, can solve the problems of poor compatibility between barrier resin and polypropylene, lack of functional groups, and inability to disperse uniformly, so as to achieve improved barrier performance and excellent barrier properties. Oxygen performance, the effect of easy implementation

Active Publication Date: 2019-02-05
NINGBO RUICHENG PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the barrier resins used are all polar polymers, and polypropylene is a non-polar polymer lacking functional groups, coupled with its semi-solid properties, and the relative properties of barrier resins and polypropylene Poor capacity, unable to disperse evenly in the polypropylene matrix, greatly weakening its barrier effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for producing a blended high-barrier polypropylene packaging film, comprising the following steps:

[0024] (1) Under anhydrous and oxygen-free conditions, toluene, aluminum alkyl as cocatalyst, C-donor external electron donor and chain transfer agent ZnEt 2 Add to the Schlenk bottle, and finally add the main catalyst TiCl 4 / MgCl 2 , feed propylene with a pressure of 0.1-1.1Mpa, control the polymerization temperature to 50°C, and the polymerization time to 1h to obtain isotactic polypropylene.

[0025] (2) Oxidize isotactic polypropylene with dry oxygen, react at an oxidation temperature of 100 ° C for 0.5 h, quench with 1 mol / L hydrochloric acid aqueous solution to deactivate the catalyst, stir for 10 min and let stand with a separatory funnel Separate the liquid, remove the supernatant and the middle layer; remove the solvent in the solid product, wash it repeatedly with distilled water and toluene, and then dry it in vacuum to obtain isotactic polypropyle...

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PUM

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Abstract

The invention discloses a production method for a co-blending-method high-barrier-property polypropylene packaging film. An isotatic polypropylene-b-polyethylene glycol di-block polymer is used as a compatilizer of isotatic polypropylene and polyvinyl alcohol. The polyvinyl alcohol has excellent antioxygen performance. After the isotatic polypropylene-b-polyethylene glycol di-block polymer is usedas the compatilizer, the isotatic polypropylene and the polyvinyl alcohol have good compatibility, so that a polyvinyl alcohol phase can be uniformly dispersed in polypropylene resin, and a sub-continuity phase or a laminar structure is formed, so that a barrier property of a co-blending film is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a production method of a high-barrier polypropylene packaging film by a blending method. Background technique [0002] The barrier performance of the polypropylene packaging film in the prior art is not good, and substances such as oxygen, carbon dioxide, water vapor, aroma and small organic molecules are easy to pass through the polypropylene film and affect the performance and life of the packaged object. At present, there are mainly four methods for preparing high-barrier polypropylene films: multilayer composite, surface coating, nanocomposite modification and blend modification. These four methods all have their own defects and deficiencies. Problems such as residues, waste separation and post-processing difficulties; surface coating equipment is expensive, high cost, and film layer is uneven; nanocomposites are prone to particle agglomeration, resulting in decre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L29/04C08L75/08C08J5/18C08F110/06C08F4/649C08F2/38C08F8/12C08F8/06C08G18/62C08G18/48C08G18/75
CPCC08F2/38C08F8/12C08F110/06C08G18/48C08G18/6204C08G18/755C08J5/18C08J2323/12C08J2429/04C08J2475/08C08F4/6498C08F2500/15C08F8/06
Inventor 邵峥
Owner NINGBO RUICHENG PACKING MATERIAL
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