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

Toughening modified polylactic acid composite material and method for producing the same

A composite material and a technology of toughening and modification are applied in the field of toughening and modified polylactic acid composite materials and their preparation, and can solve the problems of poor flexibility and impact resistance, limiting the large-scale popularization and application of polylactic acid, and high rigidity of polylactic acid. Achieve the effects of excellent impact resistance, excellent elongation at break, and simple preparation process

Inactive Publication Date: 2009-08-19
ANHUI KEJU NEW MATERIALS
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, pure polylactic acid has high rigidity, poor flexibility and impact resistance, and is a hard and brittle material at room temperature, which limits the large-scale application of polylactic acid in the packaging field.

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

[0032] The weight ratio of polylactic acid is 97.9% (the following are weight ratios), TPU Elastollan C85A 1%, 1010 / 1680.2 / 0.3%, PETS 0.1%, and other additives 0.5%. The mixed material is put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated to form a composite material. Among them, the temperature setting of each heating zone of the screw is respectively: the temperature of the first zone is 170°C, the temperature of the second zone is 180°C, the temperature of the third zone is 190°C, the temperature of the fourth zone is 190°C, the temperature of the head is 185°C; the residence time is 2 to 3 minutes, the pressure It is 13Mpa.

Embodiment 2

[0034] The weight ratio of polylactic acid is 93.9% (the following are weight ratios), TPU Elastollan C85A 5%, 1010 / 1680.2 / 0.2%, PETS 0.1%, and other additives 0.6%. The mixed material is put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated to form a composite material. Among them, the temperature setting of each heating zone of the screw is respectively: the temperature of the first zone is 170°C, the temperature of the second zone is 180°C, the temperature of the third zone is 190°C, the temperature of the fourth zone is 190°C, the temperature of the head is 185°C; the residence time is 2 to 3 minutes, the pressure It is 13Mpa.

Embodiment 3

[0036] The weight ratio of polylactic acid is 88.9% (the following are weight ratios), TPU Elastollan C85A 10%, 1010 / 1680.3 / 0.2%, PETS 0.1%, and other additives 0.5%. The mixed material is put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated to form a composite material. Among them, the temperature setting of each heating zone of the screw is respectively: the temperature of the first zone is 170°C, the temperature of the second zone is 180°C, the temperature of the third zone is 190°C, the temperature of the fourth zone is 190°C, the temperature of the head is 185°C; the residence time is 2 to 3 minutes, the pressure It is 13Mpa.

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

No PUM Login to View More

Abstract

The invention discloses a toughened polylactic acid composite and a preparation method thereof. The composite consists of the components with the weight proportion as follows: 72-98 percent of polylactic acid, 1-25 percent of toughener, 0.4-0.6 percent of antioxidant, 0.1-0.5 percent of lubricant and 0.5-2 percent of other processing promoter. In the invention, thermoplastic polyurethane is taken as the toughener, thereby improving the flexibility and the molding processability of PLA obviously and improving the shock resistance and the breaking elongation of the polylactic acid to a great extent.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a toughened modified polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid is a biodegradable polymer made from renewable plant resources. It has good biocompatibility, compostability, and biodegradability. It can be gradually degraded in the natural environment and finally decomposed into carbon dioxide and water. . It is a kind of thermoplastic aliphatic polyester, which can replace traditional materials, and has a promising industrialization prospect. It can be widely used in medical, agricultural, packaging, clothing, civil engineering, daily necessities and other fields. [0003] However, pure polylactic acid has high rigidity, poor flexibility and impact resistance, and is a hard and brittle material at room temperature, which limits the large-scale application of polylactic acid in the packaging field....

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
IPC IPC(8): C08L67/04C08L75/04C08K5/134C08K5/526C08K5/103B29B9/00B29C47/92B29C48/40B29C48/92
CPCB29C48/04B29C48/40
Inventor 徐东贺永谢建达
Owner ANHUI KEJU NEW MATERIALS
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com