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Full-biodegradable composite film and preparation method thereof

A composite thin film and all-biological technology, applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problem of not improving the strength and flexibility, elongation at break and impact strength of polylactic acid Can not meet the demand, do not improve the mechanical properties of polylactic acid and other problems, achieve low cost, solve the performance and cost constraints, and improve the effect of mechanical properties

Active Publication Date: 2015-06-10
HUBEI GUANCHENG BIODEGRADABLE PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese invention patent with the application number 201110129543.X discloses a method for preparing waste gas wool / polylactic acid ecologically compatible materials. The composite material prepared by this method can be completely biodegradable, but the composite material prepared by this method is not very good. Good to improve the mechanical properties of polylactic acid, the compatibility of polylactic acid and wool is poor, which limits its good application in the field of packaging materials
The Chinese patent application with the application number 201110292129.0 discloses a fully biodegradable keratin fiber reinforced and heat-resistant modified polylactic acid material and its preparation method. The raw materials used in this method include wool, cow hair, sheep horn, etc. Modified keratin fibers are obtained, and the modified polylactic acid material prepared by this method does not improve the strength and flexibility of polylactic acid well, and its elongation at break and impact strength cannot meet the requirements
[0006] At present, the main problems hindering the application of biodegradable polylactic acid are hard and brittle performance, low impact strength, poor toughness at low temperature, and high molecular weight polylactic acid is difficult to degrade.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A fully biodegradable polylactic acid composite film, composed of the following raw materials in parts by weight: 66 parts of polylactic acid (PLA), 13 parts of polyethylene glycol (PEG), 3 parts of citrate, and 13 parts of ultrafine wool powder , 1.7 parts of solubilizer, 1.7 parts of ultrafine zeolite powder, 1 part of ultrafine aluminum powder, 1.5 parts of ultrafine volcanic stone powder, 2.5 parts of silicone oil, 1.5 parts of phosphite; the particle diameter of the ultrafine wool powder is 0.1-5 μm , the particle size of the ultrafine aluminum powder is 10-12 μm, and the particle size of the ultrafine volcanic stone powder and the zeolite powder are both 8-10 μm.

[0039] In this embodiment, the polylactic acid is polymerized from D-lactic acid and L-lactic acid, and the mass ratio of D-lactic acid and L-lactic acid is 80:20.

[0040] In this embodiment, the solubilizer is a small molecule solubilizer, and the small molecule solubilizer is maleic anhydride (MAH). ...

Embodiment 2

[0050] A fully biodegradable polylactic acid composite film, consisting of the following raw materials in parts by weight: 65 parts of polylactic acid (PLA), 14 parts of polyethylene glycol (PEG), 3.5 parts of citrate, and 12 parts of ultrafine wool powder , 1.5 parts of solubilizer, 1.6 parts of ultrafine zeolite powder, 1 part of ultrafine aluminum powder, 1.5 parts of ultrafine volcanic stone powder, 2 parts of silicone oil, and 1 part of phosphite; the particle size of the ultrafine wool powder is 0.1-5 μm , the particle size of the ultrafine aluminum powder is 10-12 μm, and the particle size of the ultrafine volcanic stone powder and the zeolite powder are both 8-10 μm.

[0051] In this embodiment, the polylactic acid is polymerized from D-lactic acid and L-lactic acid, and the mass ratio of D-lactic acid and L-lactic acid is 80:20.

[0052] In this embodiment, the solubilizer is a small molecule solubilizer, and the small molecule solubilizer is dioctyl maleate (BOM).

...

Embodiment 3

[0062] A fully biodegradable polylactic acid composite film, consisting of the following raw materials in parts by weight: 68 parts of polylactic acid (PLA), 10 parts of polyethylene glycol (PEG), 2 parts of citrate, and 10 parts of ultrafine wool powder , 1.8 parts of solubilizer, 1.8 parts of ultrafine zeolite powder, 1 part of ultrafine aluminum powder, 1.5 parts of ultrafine volcanic stone powder, 3 parts of silicone oil, 2 parts of phosphite; the particle size of the ultrafine wool powder is 0.1-5 μm , the particle size of the ultrafine aluminum powder is 10-12 μm, and the particle size of the ultrafine volcanic stone powder and the zeolite powder are both 8-10 μm.

[0063] In this embodiment, the polylactic acid is polymerized from D-lactic acid and L-lactic acid, and the mass ratio of D-lactic acid and L-lactic acid is 80:20.

[0064] In this embodiment, the solubilizer is a small molecule solubilizer, and the small molecule solubilizer is diisocyanate.

[0065] In thi...

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Abstract

The invention belongs to the technical field of polymer materials, and particularly relates to a full-biodegradable composite film and a preparation method thereof. The composite film is prepared from the following raw materials: polylactic acid, polyethylene glycol, citrate, ultrafine wool powder, a solubilizer, ultrafine zeolite powder, ultrafine aluminum powder, ultrafine vesuvianite powder, silicone oil and phosphite ester, is resistant in temperature, tearing and stretching, can be completely biodegraded, does not pollute environment, and has the characteristics of antibacterial property, good transparency, high glossiness and the like. The composite film can be used in the field of packaging bags, particularly in foods, daily necessities farmlands, shopping bags and the like. The preparation method adopts a three-layer co-extrusion casting film technology, can perform molding through a quenching roll, is high in accuracy, and can sufficiently exert performance of a processed material; and the size accuracy, optical performance, thickness uniformity and the like of the film can be guaranteed due to each process and parameter.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a fully biodegradable composite film and a preparation method thereof. Background technique [0002] At present, the research and development of biodegradable plastics is mainly based on starch-based biodegradable plastics, and the main products are starch products added or blended with polyolefin or polystyrene. However, this starch / plastic blend does not achieve true complete biodegradation, but only breaks down the polymer into pieces, which still has a large impact on the environment. [0003] Polylactic acid (PLA) is a completely environmentally friendly biodegradable material with good mechanical properties and biodegradability. The raw materials come from a wide range of sources, including corn, wheat, tapioca and other starches as the initial raw materials. Its application in the field of packaging has important practical significance. It is easil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L71/08C08L89/00C08K13/02C08K3/34C08K3/08C08K5/524C08K5/1539C08K5/11C08K5/29C08J5/18B29C69/00B29C47/06B29C55/14B32B27/06B32B27/36B32B27/00
Inventor 周焕珍周星焕
Owner HUBEI GUANCHENG BIODEGRADABLE PLASTIC PRODS