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Anti-bacterium mildew-proof biodegradable polylactic acid foam plastic and preparation method thereof

An antibacterial, antifungal, and biodegradable technology, applied in the field of engineering plastics, can solve problems such as gaps, achieve advanced production technology, wide sources of raw materials, and overcome the effects of oil shortage

Inactive Publication Date: 2007-03-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the field of making antibacterial and mildew-proof polylactic acid foam by direct extrusion method is still blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix 100 parts by weight of polylactic acid resin (U.S. Natrueworks, 4042D), 3 parts by weight of antibacterial and anti-mildew masterbatch, and 2 parts by weight of montmorillonite (DK4 type), and mix them evenly, add them to the extruder and extrude , the temperature of the extruder is 160-210°C, the rotational speed of the main machine is 850rpm, and the rotational speed of the screw is 30rpm, and the masterbatch is cooled and diced. Evenly mix the masterbatch and 0.3 parts by weight of foaming agent and add them to the extruder for extrusion and foaming. The extrusion temperature, the speed of the host machine and the speed of the screw are the same as above. 0.5 parts by weight of dioctyl phthalate. The foam is extruded, cooled, shaped, cut, flattened, drawn and coiled. The traction speed is 28rpm, and the obtained product specifications are: thickness 3mm, width 1200mm, cell diameter 0.145mm, cell density 1.8×10 5 piece / cm 3 The cell density is the antibacterial...

Embodiment 2

[0032] The amount of polylactic acid resin and antibacterial and antifungal in the compound is the same as in embodiment 1, montmorillonite (DK4) 3 weight parts, the raw material that catechol 0.5 weight part forms mixes evenly, joins in extruder and carries out extruding The temperature of the extruder is between 150-230°C, the rotation speed of the main machine is 800rpm, and the rotation speed of the screw is 30rpm, and the masterbatch is cooled and diced. Evenly add 0.6 parts by weight of the masterbatch and foaming agent into the extruder for extrusion foaming, the extrusion temperature, the speed of the host machine, and the speed of the screw are the same as above, and add 0.5 parts by weight of toluene diisocyanate through a metering pump during extrusion, and 1 part by weight of dioctyl diformate. The foam is extruded, cooled, shaped, cut, flattened, drawn and coiled. The traction speed is 30rpm, the obtained product specifications are: thickness 2.9mm, width 1200mm,...

Embodiment 3

[0034] There will be 100 parts by weight of polylactic acid resin (U.S. Natrueworks, 4042D) and 4 parts by weight of antibacterial and anti-mildew masterbatch, 0.5 parts by weight of catechol and 0.5 parts by weight of hydroquinone, 3.5 parts by weight of montmorillonite (DK4 type) , the raw materials are mixed evenly, added to the extruder for extrusion, the temperature of the extruder is 170-240°C, the speed of the main machine is 850rpm, and the speed of the screw is 30rpm, and the masterbatch is cooled and diced. Mix the masterbatch and 1.0 parts by weight of foaming agent evenly and add them to the extruder for extrusion and foaming. The extrusion temperature, the speed of the host machine and the speed of the screw are the same as above. During the extrusion, 0.5 parts by weight of toluene diisocyanate, benzene 0.5 parts by weight of xylene diisocyanate, and 2 parts by weight of dioctyl phthalate. The foam is extruded, cooled, shaped, cut, flattened, drawn and coiled. T...

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Abstract

The invention discloses an antibiotic fungus-proof decomposalbe polylactic foam plastic and preparing method, which comprises the following parts: 100wt% polylactic resin, 1-5wt% antibiotic fungus-proof additive, 0.5-2wt% crosslinking agent, 0.5-5wt% nucleation agent, 0.5-2.5wt% foaming agent, 0.5-3wt% plasticizer and 0.5-1wt% anti-oxidant. The manufacturing method comprises the following steps: squeezing the composite material without foaming agent to prepare antibiotic fungus-proof mother material directly; adding foaming agent in the mother material; squeezing directly; moulding; flatting; drawing; coiling; packing.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and in particular relates to a polylactic acid foam plastic and a preparation method thereof. Background technique [0002] With the development of the country and the gradual improvement of people's living standards, people's awareness of health and environmental protection is increasing. Creating a comfortable, clean, antibacterial and mildew-proof, and preventing the spread of diseases in living, learning and working environments is what people are passionate about. Product waste can be biodegraded automatically, and it does not pollute the environment is also an urgent requirement of the current international environmental protection cause. Regrettably, while people are improving their own living environment, they have also created favorable conditions for the reproduction and growth of microorganisms and bacteria. The increasing severity of white pollution has also put enormou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/29C08J9/00B29C47/00
Inventor 任杰刘智勇袁华
Owner TONGJI UNIV
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