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

Lyocell fiber/polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of Lyocell fiber/polylactic acid composite material and its preparation, can solve the problems of low heat distortion temperature, slow crystallization rate, etc., and achieve the effect of simple operation, high production efficiency, and excellent comprehensive performance

Inactive Publication Date: 2013-06-12
DONGHUA UNIV
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since PLA is a semi-crystalline high polymer, the crystallization rate is relatively slow and the heat distortion temperature is low. Therefore, when traditional molding processing methods such as injection molding or compression molding are used, the obtained PLA products are usually amorphous, and its application is restricted by glass. Transformation temperature (Tg) limit, low heat distortion temperature
Although Lyocell fibers can enhance the mechanical properties of PLA materials, their heat distortion temperature is still low

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
  • Lyocell fiber/polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In terms of weight percentage, weigh 99% dry polylactic acid and 1% Lyocell fiber, the fiber length is 1±0.5mm, melt blend in a twin-screw extruder at 170°C for 3min, and extrude to pelletize. The samples of Lyocell fiber / polylactic acid composites were prepared by injection molding machine, and the tensile, bending, notched impact strength and Vicat softening point temperature of the tested samples are shown in Table 1.

Embodiment 2

[0031] According to weight percentage, weigh 80% dry polylactic acid and 20% Lyocell fiber, the fiber length is 4±0.5mm, melt and blend through twin-screw extruder at 210°C and extrude to pelletize. The Lyocell fiber / polylactic acid composite sample was prepared by a compression molding machine. The tensile, bending, notched impact strength and Vicat softening point temperature of the tested samples are shown in Table 1.

Embodiment 3

[0033] According to weight percentage, weigh 50% dry polylactic acid and 50% Lyocell fiber, the fiber length is 6±0.5mm, melt blend in an internal mixer at 190°C for 5min, and extrude to pelletize. The samples of Lyocell fiber / polylactic acid composites were prepared by injection molding machine, and the tensile, bending, notched impact strength and Vicat softening point temperature of the tested samples are shown in Table 1.

[0034] Table 1 Properties of composites with different contents and different blending methods

[0035] Test items

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
softening pointaaaaaaaaaa
Vicat softening pointaaaaaaaaaa
Login to View More

Abstract

The invention relates to a Lyocell fiber / polylactic acid composite material and a preparation method thereof. The composite material comprises the following components in percentage by weight: 50-99% of polylactic acid and 1-50% of Lyocell fibers. The preparation method comprises the following steps of melting and blending polylactic acid and the Lyocell fibers in polymer processing equipment to prepare the Lyocell fiber / polylactic acid composite material. The Lyocell fiber / polylactic acid composite material is subjected to heat treatment after injection moulding or mould pressing forming, so that the heat resistance of the Lyocell fiber / polylactic acid composite material can be greatly improved. The Lyocell fiber / polylactic acid composite material prepared by the method is a green composite material in real sense, can be completely degraded in a natural environment after being wasted, belongs to environment-friendly materials, and has extensive application values in the fields of catering, automobile and the like.

Description

technical field [0001] The invention belongs to the field of polymer composite materials and preparation thereof, in particular to a Lyocell fiber / polylactic acid composite material and a preparation method thereof. Background technique [0002] The main raw materials for the production of polylactic acid (PLA) come from plant resources such as corn and potatoes. PLA is recognized as an environmentally friendly material because of its rich raw materials, excellent biodegradability and renewability. As a biodegradable polymer material that is currently researched and applied relatively more, PLA has excellent thermal, mechanical and optical properties, and is one of the few materials that can be compared with polyethylene (PE) and polypropylene (PP). , polystyrene (PS) and other general-purpose plastics comparable to biological macromolecules. However, PLA materials still have disadvantages such as high brittleness, low heat distortion temperature, and poor impact resistanc...

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): C08L67/04C08L1/02
Inventor 张慧慧葛昭邵惠丽钱进杨革生胡学超
Owner DONGHUA UNIV