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Polylactic acid composition, and toughened transparent material and preparation method thereof

A composition and polylactic acid technology, applied in the field of polylactic acid materials, can solve the problems of low transparency of polylactic acid, unsuitable for large-scale production, complex process, etc. Effect

Pending Publication Date: 2020-11-17
GUANGZHOU HUAXINKE ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the transparency of polylactic acid prepared by the existing technology is still low, and the process is relatively complicated, which is not suitable for large-scale production.

Method used

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  • Polylactic acid composition, and toughened transparent material and preparation method thereof
  • Polylactic acid composition, and toughened transparent material and preparation method thereof

Examples

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Effect test

preparation example Construction

[0049] The embodiment of the present invention further provides a method for preparing the above-mentioned toughened transparent material, comprising the following steps:

[0050] S10, melt and knead polylactic acid resin, polyether polyol, epoxy-based oil or polylactic acid resin, polyether polyol, epoxy-based oil, and other additives to obtain a toughened transparent material preform;

[0051] S20, extruding the obtained toughened transparent material preform into granules or extrusion molding.

[0052] In step S10, the temperature of the melting and kneading step is 140°C-240°C.

[0053] For the mixing of the components, known and commonly used methods and kneading techniques can be applied. For example, when using a twin-screw extrusion mixer to extrude, mix and granulate powdery or granular polylactic acid resin, polyether polyols, epoxy oils and other additives can be added, heating, It can be sheared and mixed to carry out extrusion kneading and granulation. For the ...

Embodiment

[0065] Preparation of Toughened Transparent Materials

[0066] Using a twin-screw extruder (manufactured by Perker, HK25D, cylinder diameter 25.2mm, rotating speed 100rpm, melt index is 3g / min~40g / min, when ejection amount 8kg / , the composition raw material shown in table 1 is in Melting and kneading at a melting and kneading temperature of 140°C to 240°C, and cutting the strands to obtain pellets of toughened transparent materials. Dry the obtained pellets at 110°C under reduced pressure for 2 hours, so that the moisture content reaches Below 500ppm. Each raw material is pre-dried before being fed into the extruder, the drying temperature is 80°C, and the drying time is 6h.

[0067] Extrusion conditions:

[0068] Cylinder temperature in the biaxial mixing section: 190°C;

[0069] T-die (outlet) temperature: 190°C;

[0070] Extrusion speed: 8kg / h (cooling roll contact time reaches 34 seconds);

[0071] Cooling roll surface temperature: 25°C;

[0072] Heating roller surfac...

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Abstract

The invention relates to a polylactic acid composition. The polylactic acid composition comprises, by mass, 75-95% of a polylactic acid resin, 1.5%-15% of a toughening agent and 0.1%-6% of other auxiliary agents, wherein the toughening agent is composed of epoxy oil and polyether polyol in a mass ratio of (2-3): 5, and the refractive index of the epoxy oil is 1.471 to 1.478. The invention also relates to a toughened transparent material formed by the polylactic acid composition. The invention further relates to a preparation method of the toughened transparent material.

Description

technical field [0001] The invention relates to the technical field of polylactic acid materials, in particular to a polylactic acid composition, a toughened transparent material and a preparation method thereof. Background technique [0002] With the development of the economy, the demand and consumption of plastic products have increased significantly, which has led to the rapid development of the plastics industry. With the rapid growth of plastic consumption, waste pollution has also become the focus of global attention. The mass production of waste plastics not only increases the economic burden of disposal costs, but also causes environmental pollution. In addition, my country's petroleum-based plastics industry is also facing a shortage of raw materials. One of the effective ways to solve these problems is to develop biological materials. [0003] Biomaterials generally include bio-based materials and biodegradable materials, among which, polymers that can be convert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L71/02C08L91/00C08L83/06C08K5/14C08K5/526
CPCC08L67/04C08L2201/10C08L2205/03C08L2205/035C08L2205/025C08L71/02C08L91/00C08K5/14C08K5/526C08L83/06
Inventor 贾雷余波钱玉英
Owner GUANGZHOU HUAXINKE ENTERPRISE
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