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Method for producing high temperature-resistance high-barrier polypropylene film

A high-barrier, polypropylene film technology, applied in the field of packaging materials, can solve the problems of easy adhesion, poor high temperature resistance, easy deformation, etc., and achieve the effect of improving the barrier performance, low price and low cost

Active Publication Date: 2019-01-29
NINGBO RUICHENG PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the high temperature resistance of the polypropylene film in the prior art is also poor, and it is easy to deform and stick after being heated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for producing a high-temperature-resistant high-barrier polypropylene film, comprising the following steps:

[0026] (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.

[0027] (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 po...

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PUM

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Abstract

The invention discloses a method for producing a high temperature-resistance high-barrier polypropylene film. According to the method, an isotactic polypropylene-b-polyethylene glycol diblock substance is adopted as a compatibilizer for isotactic polypropylene and polyvinyl alcohol which has excellent oxygen barrier performance, and after the isotactic polypropylene-b-polyethylene glycol diblock substance is adopted as the compatibilizer, good compatibility between the isotactic polypropylene and polyvinyl alcohol is achieved, so that the polyvinyl alcohol phase is dispersed uniformly in the polypropylene resin; therefore, a demi-continuity phase or a lamellar structure is formed, and the barrier performance of the blended film can be improved significantly; the hardness of the thin film is improved through addition of nano-silica so that the energy of heat-resistance deformation is improved, and moreover the tearing effect is improved effectively through addition of palm wax.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a production method of a high-temperature-resistant and high-barrier polypropylene film. 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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IPC IPC(8): C08L23/12C08L87/00C08L29/04C08L91/06C08K3/36C08J5/18C08G81/02C08F8/06C08F110/06C08F4/645
CPCC08F8/06C08F110/06C08G81/025C08J5/18C08J2323/12C08J2429/04C08J2487/00C08K3/36C08K2201/011C08F4/645
Inventor 邵峥
Owner NINGBO RUICHENG PACKING MATERIAL
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