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Preparation method of high barrier LDPE film

A high-barrier, thin-film technology, applied in the field of polymer materials, can solve problems such as poor oxygen barrier properties, achieve good oxygen barrier properties, good application value, and simple preparation methods

Inactive Publication Date: 2017-11-17
苏州奥宇包装科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantage is poor barrier to oxygen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A method for preparing a high-barrier LDPE film, comprising the following steps: first weigh 90 parts of LDPE, 12 parts of butyl etherified urea-formaldehyde resin, 3 parts of zinc stearate, 10 parts of polyvinylidene fluoride, 10 parts of gelatin, nano 7 parts of montmorillonite, 7 parts of toluene diisocyanate, 30 parts of peanut oil, 4 parts of tetrabutyl titanate, 12 parts of ammonium bicarbonate, 1 part of 2,4-dihydroxybenzophenone, 5 parts of propyl gallate, 2 parts of bayberry wax, 5 parts of nano-calcium carbonate; LDPE, tetrabutyl titanate, ammonium bicarbonate, and bayberry nano-calcium carbonate were fully stirred in a sealed rubber mixer for 1 hour to obtain a mixture; then butylated urea-formaldehyde Resin, zinc stearate, polyvinylidene fluoride, nano-montmorillonite, toluene diisocyanate and peanut oil are stirred for 3 hours and then fully mixed, reacted in a reactor at 150°C for 2 hours, and then sent to a twin-screw granulator after reaction Granulate i...

Embodiment 2

[0014] A method for preparing a high-barrier LDPE film, comprising the following steps: first weigh 110 parts of LDPE, 18 parts of butylated urea-formaldehyde resin, 8 parts of zinc stearate, 15 parts of polyvinylidene fluoride, 15 parts of gelatin, nano 9 parts of montmorillonite, 10 parts of toluene diisocyanate, 40 parts of peanut oil, 8 parts of tetrabutyl titanate, 14 parts of ammonium bicarbonate, 2 parts of 2,4-dihydroxybenzophenone, 15 parts of propyl gallate, 3 parts of bayberry wax, 10 parts of nano-calcium carbonate; LDPE, tetrabutyl titanate, ammonium bicarbonate, and bayberry nano-calcium carbonate were fully stirred in a sealed rubber mixer for 2 hours to obtain a mixture; then butylated urea-formaldehyde Resin, zinc stearate, polyvinylidene fluoride, nano-montmorillonite, toluene diisocyanate and peanut oil are stirred for 3 hours and then fully mixed, reacted in a reactor at 200°C for 4 hours, and sent to a twin-screw granulator after reaction Granulate in the ...

Embodiment 3

[0016] A method for preparing a high-barrier LDPE film, comprising the following steps: first weigh 100 parts of LDPE, 15 parts of butylated urea-formaldehyde resin, 5 parts of zinc stearate, 13 parts of polyvinylidene fluoride, 13 parts of gelatin, nano 8 parts of montmorillonite, 8 parts of toluene diisocyanate, 35 parts of peanut oil, 6 parts of tetrabutyl titanate, 13 parts of ammonium bicarbonate, 2 parts of 2,4-dihydroxybenzophenone, 10 parts of propyl gallate, 3 parts of bayberry wax, 7 parts of nano-calcium carbonate; LDPE, tetrabutyl titanate, ammonium bicarbonate, and bayberry nano-calcium carbonate were fully stirred in a sealed rubber mixer for 1.5 hours to obtain a mixture; then butylated urea-formaldehyde Resin, zinc stearate, polyvinylidene fluoride, nano-montmorillonite, toluene diisocyanate and peanut oil are stirred for 3 hours and then fully mixed, reacted in a reactor at 180°C for 3 hours, and then sent to a twin-screw granulator after reaction Granulate in...

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PUM

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Abstract

The invention discloses a preparation method of a high barrier LDPE film. The preparation method comprises the following steps: adding LDPE, tetrabutyl titanate, ammonium bicarbonate, and nano calcium carbonate into a sealing type rubber mixing mill, fully stirring to obtain a mixed material; then stirring and fully mixing butyl etherized urea resin, zinc stearate, polyvinylidene difluoride, nano montmorillonite, toluene diisocyanate, and peanut oil, carrying out reactions for 2 to 4 hours in a reactor, after reactions, delivering the reaction product into a double screw granulator to carry out granulation to obtain master batch; finally, fully stirring the master batch and the mixed material for an half hour, delivering the mixture to a double screw extruder to carry out melting and extruding, cooling, cutting, splitting to obtain granules; adding residual raw materials into the granules, stirring and mixing, and finally performing melting, plasticizing, mouth model molding, blowing, corona disposing, and reeling in a film blowing facility. Through the nano material modification, the prepared LDPE film has a good performance on blocking oxygen, high chemical stability, good heat sealing property, excellent waterproof property, and good performance on resisting damp and cold. Moreover, the preparation method is simple. The LDPE film has a good application value.

Description

technical field [0001] The invention belongs to the field of polymer materials and relates to a preparation method of a high-barrier LDPE film. technical background [0002] Plastic flexible packaging materials generally refer to materials that are composed of plastic (or plastic composite materials), have a soft texture, and can be used to package goods by making bags, wrapping, etc. The most widely used flexible packaging materials are various plastic films and their film-like composite materials, fabric packaging materials, etc. The wide application of flexible packaging materials provides an extremely broad space for activities for enterprises and institutions engaged in the flexible packaging industry. While providing excellent services for the majority of users, they have also achieved good benefits higher than other plastic molding processing industries. Has been developed rapidly, the prospect is very bright. Due to the wide variety of flexible packaging material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L61/32C08L27/16C08L89/00C08L91/00C08K13/02C08K5/098C08K3/34C08K5/29C08K5/10C08K5/132C08K3/26
CPCC08L23/06C08K2003/265C08L2201/14C08L2203/16C08L2205/035C08L2207/066C08L61/32C08L27/16C08L89/00C08L91/00C08K13/02C08K5/098C08K3/346C08K5/29C08K5/10C08K5/132C08K3/26
Inventor 顾建芳
Owner 苏州奥宇包装科技有限公司
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