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High-transparency and low-cost polylactic acid composite material and preparation method thereof

A composite material and polylactic acid technology, which are applied in the field of high-transparency and low-cost polylactic acid composite materials and their preparation, can solve the problem of restricting the application of polylactic acid/starch blend materials, the color yellowing of polylactic acid composite materials, and the application cost of polylactic acid. Advanced problems, to achieve the effect of being suitable for industrial production, reducing application cost and low cost

Active Publication Date: 2017-11-03
NINGBO HOMELINK ECO ITECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is unsatisfactory: the hydrophobicity of polylactic acid and the hydrophilicity of starch make the compatibility of polylactic acid and starch directly blended poor, and the blended alloy is opaque, which limits the application of polylactic acid / starch blend materials. especially in packaging materials
Chinese patents 201010594708.6, 201210047401.3, 201210062675.X and 201110158433.6 disclose the use of starch to fill modified polylactic acid. After melt extrusion, the starch will cause the color of the polylactic acid composite material to turn yellow
However, the weight fraction of its polylactic acid in the whole composite material system is as high as 85%-99%, because the light transmittance of polylactic acid is 92%, the increase of its light transmittance is to improve the polylactic acid in the whole system. At the expense of the ratio, the application cost of PLA is high
[0006] In the prior art, improving the transparency and reducing the ratio of polylactic acid often lose sight of the other

Method used

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  • High-transparency and low-cost polylactic acid composite material and preparation method thereof
  • High-transparency and low-cost polylactic acid composite material and preparation method thereof
  • High-transparency and low-cost polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 A kind of polylactic acid composite material with high transparency and low cost

[0051] Contains components in parts by weight:

[0052]

[0053] The preparation process is as follows:

[0054] At 105°C, polylactic acid, PBAT resin and diatomaceous earth were mixed uniformly and dried for 30 minutes using a high-speed mixer, then polyethylene glycol (400) diglycidyl ether and epoxidized soybean oil were added and mixed for 5 minutes, and then Use twin-screw extruder to melt extrude, draw strands, air-cool, granulate, and seal the package. The screw length-to-diameter ratio of the twin-screw extruder is 36:1, and the melt blending temperature is 170°C to 180°C.

Embodiment 2

[0055] Embodiment 2 A kind of polylactic acid composite material with high transparency and low cost

[0056] Contains components in parts by weight:

[0057]

[0058] The preparation process is as described in Example 1.

Embodiment 3

[0059] Embodiment 3 A kind of polylactic acid composite material with high transparency and low cost

[0060] Contains components in parts by weight:

[0061] The formula is as follows:

[0062]

[0063] The preparation process is as described in Example 1.

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Abstract

The invention relates to a high-transparency and low-cost polylactic acid composite material, which contains, by weight, 50-75 parts of polylactic acid, 1-5 parts of PBAT resin, 20-40 parts of ultrafine diatomaceous earth, 1-5 parts of polyethylene glycol diglycidyl ether, and 1-3 parts of epoxy vegetable oil. According to the present invention, the disclosed polylactic acid composite material can maintain the high transparency under the premise of the maintaining of the high proportion of the filler so as to reduce the application cost of the polylactic acid; and the polylactic acid composite material has advantages of excellent transparency, excellent mechanical property, high whiteness, environment friendliness, and simple preparation.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a highly transparent and low-cost polylactic acid composite material and a preparation method thereof. Background technique [0002] At present, plastic is one of the most used polymer materials. However, it is well known that plastic is difficult to degrade and will exacerbate the shortage of petroleum. Polylactic acid (PLA) is a novel bio-based and biodegradable material made from starch raw materials proposed from renewable plant resources such as corn, and possesses polystyrene-like mechanical properties. Therefore, polylactic acid is the most environmentally friendly polymer material with industrialization prospects. However, poor heat resistance and high price limit the industrialization of polylactic acid. [0003] In the prior art, the blending of polylactic acid and starch can not only reduce the cost, but also shorten the degradation cycle of the...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L91/00C08L71/02C08K3/34C08K5/1515
CPCC08K2201/003C08L67/04C08L2201/06C08L2201/08C08L2201/10C08L2205/02C08L2205/03C08L2205/035C08L67/02C08L91/00C08K3/34C08K5/1515C08L71/02
Inventor 王熊李鹏陈虎啸
Owner NINGBO HOMELINK ECO ITECH CO LTD
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