Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of high-strength and high-toughness polypropylene barrier material and preparation method thereof

A high-toughness polypropylene and barrier material technology, applied in the field of polymer material processing, can solve the problems of inability to improve the gas barrier properties of materials, achieve good industrial application prospects, extend the tortuous path, and improve the effect of gas barrier properties

Active Publication Date: 2020-11-06
贵州国塑科技管业有限责任公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a high-barrier polypropylene material by constructing a transverse crystal structure in which the lamellar crystals are perpendicular to the direction of gas permeation to solve the problem that the existing transverse crystal structure cannot improve the gas barrier performance of the material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of high-strength and high-toughness polypropylene barrier material and preparation method thereof
  • A kind of high-strength and high-toughness polypropylene barrier material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] After mixing the amide β-nucleating agent (trade name TMB-5) and ethylene-vinyl alcohol copolymer (EVOH) at a weight ratio of 0.7:99.3, put them into a twin-screw extruder to extrude and granulate to obtain TMB-containing -5 EVOH. Among them, the temperature of each section of the twin-screw extruder is controlled at 180 o C-190 o C-210 o C-210 o C-200 oc. After mixing EVOH containing TMB-5 and pure polypropylene at a ratio of 10:90 (by weight), they are put into micro-nano laminated co-extrusion equipment for in-situ microfibrillation, in which the feeding section of the extruder (A, B), the conveying The temperature of section, melting section, homogenization section, layer distributor (D, E), and die (F) is 180 o C. 190 o C. 210 o C. 210 o C. 210 o C. 200 o c. The gas barrier performance test results showed that compared with pure polypropylene, the oxygen permeability coefficient of the material increased from 6.322×10 -14 cm 3 cm / cm 2 ·s·Pa reduced t...

Embodiment 2

[0030] Mix the rare earth β-nucleating agent (trade name WBG-II) and polyamide 6 (PA6) at a weight ratio of 0.5 : 99.5, put them into a twin-screw extruder for extrusion and granulation, and obtain WBG-II-containing PA6. Among them, the temperature of each section of the twin-screw extruder is controlled at 180 o C-220 o C-230 o C-230 o C-220 o c. After mixing PA6 containing WBG-II and pure polypropylene at a ratio of 20:80 (weight ratio), put them into micro-nano lamination co-extrusion equipment for in-situ microfibrillation, where the feeding section of the extruder (A, B), the conveying The temperature of section, melting section, homogenization section, layer distributor (D, E), and die (F) is 180 o C. 220 o C. 230 o C. 230 o C. 230 o C. 220 o c. The performance test results of the in-situ microfiber composite material are as follows: the oxygen permeability coefficient is 7.233×10 -16 cm 3 cm / cm 2 ·s·Pa, tensile strength 58.3 MPa, elongation at break 640....

Embodiment 3

[0032] Mix the rare earth β-nucleating agent (trade name WBG-II) and polyamide 6 (PA6) at a weight ratio of 0.5:99.5, put them into a twin-screw extruder and extrude and granulate to obtain WBG-II-containing PA6. Among them, the temperature of each section of the twin-screw extruder is controlled at 180 o C-220 o C-230 o C-230 o C-220 o c. After mixing PA6 containing WBG-II and pure polypropylene at a ratio of 20:80 (weight ratio), put them into micro-nano lamination co-extrusion equipment for in-situ microfibrillation, where the feeding section of the extruder (A, B), the conveying The temperature of section, melting section, homogenization section, layer distributor (D, E), and die (F) is 180 o C. 220 o C. 230 o C. 230 o C. 230 o C. 220 o c. Fix the cooled and shaped sample in the mold and put it into 200 o After melting in the oven for 10 minutes, quickly move to 130 o Keep the temperature in an oil bath in C for 4 hours to obtain a heat-treated sample. The p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
elongation at breakaaaaaaaaaa
elongation at breakaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-strength and high-toughness polypropylene barrier material and a preparation method thereof. The high-strength and high-toughness polypropylene barrier material is characterized in that by utilization of micro-nano laminating and coextrusion equipment, the high-barrier polymer containing a beta core-forming agent is micro-fibrillated in situ in the polypropylene, oriented fibrous distribution of the beta core-forming agent is realized and a multi-layered microscopic structure orienting to microfiber and 'interlocked' beta transverse crystal is constructed in thepolypropylene. By utilization of the multi-layered microscopic structure, the polypropylene gas barrier property and the mechanical property are improved. The high-strength and high-toughness polypropylene barrier material and the preparation method thereof disclosed by the invention have the beneficial effects that the problems that the common preparation process can not prepare a large amount of'interlocked' beta transverse crystal with lamellar crystals being vertical to the gas permeation direction and can not utilize the transverse-crystal structure to improve the polypropylene gas barrier property and the like are solved; in addition, the equipment operation is simple, the mold processing is easy, the manufacture cost is low, continuous production is achieved, the production efficiency is high and the industrial application prospect is good.

Description

technical field [0001] The present invention relates to a high-strength and high-toughness polypropylene barrier material and its preparation method, and more specifically relates to the use of micro-nano laminated co-extrusion equipment to realize the in-situ microfibrils of high-barrier polymers containing β-nucleating agents in pure polypropylene Chemicalization, this polypropylene in-situ microfiber composite material contains oriented microfibers and a large number of "interlocked" β transverse crystals, which belongs to the technical field of polymer material processing. Background technique [0002] As one of the five general-purpose plastics, polypropylene (iPP) is widely used in the packaging industry because of its non-toxicity, light weight, impermeability, easy processing, and low price. However, the poor gas barrier performance of iPP greatly limits its application in packaging fields such as food and medicine. A large number of studies have shown that the key ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/18B29C48/92C08L23/12C08L23/08C08L77/02
CPCB29C48/18B29C48/92B29C2948/92704C08L23/12C08L2205/242C08L23/0861C08L77/02
Inventor 罗珊珊孙静黄安荣韦良强秦舒浩
Owner 贵州国塑科技管业有限责任公司