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A kind of production method of stretch-resistant high-barrier polypropylene film

A high-barrier, polypropylene film technology, applied in the field of packaging materials, can solve the problems of poor tensile strength and low tensile strength, and achieve the effects of low cost, low price and improved barrier performance.

Active Publication Date: 2021-06-29
NINGBO RUICHENG PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the polypropylene film of the prior art has poor tensile resistance and low tensile strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Production method of anti-stretch high barrier polypropylene film, including the following steps:

[0027] (1) Under anhydrous aerobic conditions, toluene, as a cocatalytic aluminum, C-Donor external electron body, and chain transfer agent ZNET 2 Add to Schlenk Bottles, and finally join the main catalyst TiCl 4 / MGCL 2 However, propylene with 0.1 to 1.1 MPa is passed, the polymerization temperature is 50 ° C, the polymerization time is 1 h, and the polypropylene is obtained.

[0028] (2) A dry oxygen oxidation or the like, the oxidation temperature is 0.5 h at an oxidation temperature of 100 ° C, quenching with 1 mol / L hydrochloric acid solution, so that the catalyst is inactivated, stirred for 10 min after stirring Separation, remove the upper, medium-layer liquid; remove the solvent in the solid product, then use distilled water and toluene to repeatedly wash, then dry, and the hydroxyl group or the like is obtained. Polypropylene.

[0029] (3) In the Schlenk bottle eq...

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Abstract

The invention discloses a production method of a stretch-resistant high-barrier polypropylene film, which uses isophorone diisocyanate as a coupling agent to couple hydroxyl-terminated isotactic polypropylene with polyethylene glycol monomethyl ether to prepare Isotactic polypropylene-b-polyethylene glycol diblock, the synthesis technology method is easy to implement, with low cost and high efficiency, the raw materials used are simple and easy to get, and the price is low. Polyethylene glycol diblock is used as a compatibilizer for isotactic polypropylene and polyvinyl alcohol, polyvinyl alcohol has excellent oxygen barrier properties, and isotactic polypropylene‑b‑polyethylene glycol diblock is used as a compatibilizer After pretreatment, the good compatibility between polypropylene and polyvinyl alcohol makes the polyvinyl alcohol phase uniformly dispersed in the polypropylene resin to form a sub-continuous phase or a lamellar structure, thereby significantly improving the blend film. Excellent barrier properties; clay and ceramic whiskers are blended with polypropylene copolymer to effectively improve the tensile strength of the film.

Description

Technical field [0001] The present invention relates to the technical field of packaging materials, and is specifically a method for producing a height-pull high barrier polypropylene film. Background technique [0002] Prior art of polypropylene packaging film is poorly resistant, oxygen, carbon dioxide, water vapor, aroma, and organic small molecules, etc. are easily transmitted through polypropylene films to the performance and life of the packaged goods. At present, there are four methods for preparing high barrier polypropylene film: multi-layer composite, surface coating, nano-composite modification and blending modification, all of which are each defect and insufficient, such as multilayer composite film presence solvent Issues such as residual, waste separation and post-treatment difficulties; the surface coating equipment is expensive, high cost, uneven film layer; nano-composite is prone to particle agglomeration, resulting in many problems such as transparency. Blend m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L87/00C08L29/04C08L23/14C08K7/08C08K3/34C08K5/20C08J5/18B32B37/00
CPCB32B37/00C08J5/18C08J2323/12C08J2323/14C08J2487/00C08K3/346C08K5/20C08K7/08
Inventor 邵峥
Owner NINGBO RUICHENG PACKING MATERIAL
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