Polylactic acid modified material, and preparation method and application thereof

A modified material, polylactic acid technology, used in flexible containers, transportation and packaging, climate sustainability, etc., can solve the problems of thick thickness, easy brittle cracking, plasticizer volatilization, insufficient exudation inhibition, etc. The preparation process is simple, the flexibility is improved, and the white pollution is reduced.

Inactive Publication Date: 2011-11-16
邹俊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology makes the softness of the composition reach a practical level, it does not sufficiently inhibit the volatilization, seepage and loss of the plasticizer
[0006] In additio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] 70 parts of polylactic acid with a molecular weight of 225,000, 10 parts of German Bayer thermoplastic polyurethane UT7-85A10 parts, 10 parts of acetyl tributyl citrate, and 10 parts of ordinary corn starch are mixed in a high-speed mixer at room temperature for 5 minutes and then added to the twin-screw extrusion Melt blending in the machine, drawing, water cooling, and pelletizing to obtain polylactic acid modified granular material. After the mechanical performance test: the tensile strength is 52.0MPa, and the elongation at break is 121.3%.

Example Embodiment

[0028] Example 2

[0029] 60 parts of polylactic acid with a molecular weight of 225,000, 10 parts of German Bayer thermoplastic polyurethane UT7-85A10, 10 parts of epoxy soybean oil, and 20 parts of thermoplastic starch were mixed in a high-speed mixer at room temperature for 8 minutes and added to the twin-screw extruder to melt together. Mixing, drawing, water cooling, and pelletizing to obtain polylactic acid modified granular material. After the mechanical performance test: the tensile strength is 48.2MPa, and the elongation at break is 98.6%.

Example Embodiment

[0030] Example 3

[0031] 50 parts of polylactic acid with a molecular weight of 225,000, 1010 parts of Bayer thermoplastic polyurethane UT7-85A10, 20 parts of propylene glycol adipic acid polyester, and 20 parts of talc are mixed by a high-speed mixer at room temperature for 10 minutes and then added to the twin-screw extruder Melt blending, drawing, water cooling, and pelletizing to obtain polylactic acid modified granular material. After the mechanical performance test: the tensile strength is 42.1MPa, and the elongation at break is 188.4%.

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PUM

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Abstract

The invention provides a polylactic acid modified material, and a preparation method and application thereof. The polylactic acid modified material contains the components in parts by weight: 40 to 70 parts of polylactic acid (one of or a mixture or a copolymer of poly-L-lactic acid, poly-D-lactic acid and poly-DL-lactic acid), 10 to 20 parts of polyester thermoplastic polyurethane, 10 to 20 parts of plasticizer and 10 to 20 parts of organic or inorganic filler, wherein the plasticizer is one or a mixture of two of tributyl acetocitrate, epoxidized soybean oil, polypropylene glycol adipate and dioctyl maleate, and the organic or inorganic filler is one or more than one of starch, talcum powder, calcium carbonate, mica, montmorillonite, clay and titanium dioxide. According to the polylactic acid modified material provided by the invention, the flexibility of a polylactic acid material can be improved and the cost of a biodegradable material is reduced; and the prepared polylactic acid modified material has the tensile strength from 15 to 70MPa and the elongation at break of 20 to 380% which are obviously better than those of like products.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polylactic acid modified material and its preparation method and application. Background technique [0002] Materials such as packaging film bags, plastic wrap bags, disposable film bags (such as garbage bags, tablecloths, and sanitary bags), agricultural films (mulch film, covering film, shed film) and blister sheets used in human daily life are more and more expensive. There are more and more plastics, most of which are petroleum-based plastics. Although they are cheap, they have poor degradation performance and become a source of pollution that damages the environment after use. [0003] Japanese Patent Application No. 9-272794 discloses a film obtained by mixing polylactic acid polymers with other aliphatic polyesters in a weight ratio of 75:25 to 20:80. It has a tensile modulus of 250Kg / mm 2 A biodegradable film with light transmittance above 65%. But, adopt th...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L75/06C08L3/02C08L67/02C08K5/11C08K5/1515C08K3/34C08K13/02C08K3/26C08K3/22B65D30/02B65D81/24A01G13/02
CPCY02W90/10
Inventor 邹俊
Owner 邹俊
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