Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polylactic acid anti-bacterial-activity packaging material and preparation method thereof

A technology of antibacterial activity and packaging materials, applied in the field of polymers, can solve the problems of non-environmental degradation, shortage of raw materials, and unmentioned problems, and achieve the effects of simple process, improved mechanical properties, and good inhibition

Inactive Publication Date: 2014-12-17
KUNMING UNIV OF SCI & TECH
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rapid development of the plastics industry and the substantial increase in the number of products have brought about some serious problems: First, most of the materials used in food packaging cannot be degraded by the environment, leading to increasingly serious environmental pollution problems; second, the current plastics The raw materials of products (such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, etc.) are non-renewable resources - petroleum, and its world reserves will face depletion in about 40 years, and the plastic industry that uses petroleum as raw material will also be exhausted. Facing a shortage of raw materials
[0005] Although many scholars at home and abroad have introduced the preparation of polylactic acid antibacterial active packaging materials, they have not mentioned the use of polylactic acid / polytrimethylene carbonate blended materials as the base material, adding natural antibacterial plant essential oils to prepare polylactic acid with antibacterial activity. Research on food antibacterial active packaging materials with excellent mechanical properties

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mix polylactic acid and polytrimethylene carbonate in a mass ratio of 9:1 and dry them in a vacuum oven for 10 hours;

[0027] (2) Feed 100 parts by weight of polylactic acid and polytrimethylene carbonate obtained in step (1) from the first feed port of the twin-screw extruder, and transport them through the screw conveying section. After the trimethylene carbonate preheating temperature reaches 150°C, add 2 parts by weight of clove essential oil from the next feed port, wherein the conditions of the twin-screw extruder are: the temperature of the first heating zone is 150°C, and the temperature of the second heating zone is 150°C. 160°C, the temperature of the third heating zone is 170°C, and the temperature of the fourth heating zone is 160°C;

[0028] (3) After granulation, add the polylactic acid antibacterial active packaging material made by film blowing machine blown film, blow the film at 160°C, the inflation ratio is 2:1, the traction ratio is 5:1, and the...

Embodiment 2

[0031] (1) Mix polylactic acid and polytrimethylene carbonate uniformly at a mass ratio of 8:2 and dry in a vacuum drying oven for 10 hours;

[0032] (2) Feed 100 parts by weight of polylactic acid and polytrimethylene carbonate obtained in step (1) from the first feed port of the twin-screw extruder, and transport them through the screw conveying section. After the trimethylene carbonate preheating temperature reaches 150°C, add 5 parts by weight of cinnamon essential oil from the next feed port to disperse the cinnamon essential oil and polymer mixture under the action of shear force, wherein the temperature of the first heating zone is 152 °C, the temperature of the second heating zone is 162 °C, the temperature of the third heating zone is 172 °C, and the temperature of the fourth heating zone is 162 °C;

[0033] (2) After granulation, add the polylactic acid antibacterial active packaging material made by film blowing machine, blow the film at 162°C, the inflation ratio i...

Embodiment 3

[0036] (1) Mix polylactic acid and polytrimethylene carbonate uniformly at a mass ratio of 7:3 and dry in a vacuum drying oven for 10 hours;

[0037](2) Feed 100 parts by weight of polylactic acid and polytrimethylene carbonate obtained in step (1) from the first feed port of the twin-screw extruder, and transport them through the screw conveying section. After the trimethylene carbonate preheating temperature reaches 150°C, add 10 parts by weight of lemongrass essential oil from the next feed port to disperse the lemongrass essential oil and polymer mixture under shear force, wherein the twin-screw extruder The conditions are: the temperature of the first heating zone is 150°C, the temperature of the second heating zone is 160°C, the temperature of the third heating zone is 170°C, and the temperature of the fourth heating zone is 160°C;

[0038] (3) After granulation, add the polylactic acid antibacterial active packaging material made by film blowing machine, blow the film a...

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
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polylactic acid anti-bacterial-activity packaging material and a preparation method thereof and belongs to the technical field of macromolecule. The anti-bacterial-activity packaging material includes, in a blending manner, a matrix resin and natural anti-bacterial plant essential oil, wherein the matrix resin accounts 100 parts by weight and the natural anti-bacterial plant essential oil accounts 2-10 parts by weight. The matrix resin is blended by polylactic acid and polytrimethylenecarbonate with a weight ratio of the polylactic acid to the polytrimethylenecarbonate being (60-90):(40-10). The natural anti-bacterial plant essential oil includes clove essential oil, cinnamon essential oil, fennel essential oil and lemongrass essential oil, thyme essential oil or origanum vulgare essential oil. The ingredients are blended in a double-screw extruder and are prepared into the novel polylactic acid anti-bacterial-activity packaging material through a film blowing machine. The material has a certain tensile strength and a certain elongation at break, can be biologically degraded completely, has an excellent anti-bacterial activity and can be widely applied in the field of packaging.

Description

technical field [0001] The invention relates to a polylactic acid antibacterial active packaging material and a preparation method thereof, belonging to the technical field of polymers. Background technique [0002] At present, in the food processing industry at home and abroad, most of the food is circulated in the market through packaging. At present, chemically synthesized plastic products are widely used in food packaging and fresh-keeping due to their low price, stable properties, excellent barrier properties, and heat resistance. However, the rapid development of the plastics industry and the substantial increase in the number of products have brought about some serious problems: First, most of the materials used in food packaging cannot be degraded by the environment, leading to increasingly serious environmental pollution problems; second, the current plastics The raw materials of products (such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, etc.) ...

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 Applications(China)
IPC IPC(8): C08L67/04C08L69/00C08L91/00B29C47/92B29C55/28B29C48/92
Inventor 覃宇悦王颂凡周志梅孙雪杨萍崔爱玲李荣江
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products