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Fully degradable polylactic acid sheet material with high strength and high-temperature resistance, and preparation method thereof

A polylactic acid, high temperature resistant technology, applied in high temperature resistant fully degradable polylactic acid sheet and its preparation, high strength field, can solve the problems of low degradation rate, low heat resistance, high brittleness, etc., and achieve enhanced tensile strength , The effect of improving high temperature resistance and elongation

Active Publication Date: 2014-01-29
深圳市江之源实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, these polylactic acid products are subject to many restrictions due to their high brittleness, low tear strength, high production cost, low heat resistance, poor hydrophilicity, low softening point, and low degradation rate. The application of materials has not been widely popularized and commercialized
Its comprehensive performance is not high, and the balance between high tensile strength and high temperature resistance of these fully degradable polylactic acid materials cannot be guaranteed.

Method used

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  • Fully degradable polylactic acid sheet material with high strength and high-temperature resistance, and preparation method thereof
  • Fully degradable polylactic acid sheet material with high strength and high-temperature resistance, and preparation method thereof
  • Fully degradable polylactic acid sheet material with high strength and high-temperature resistance, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The formula (% by weight) of a kind of fully degradable polylactic acid sheet of the present invention is as follows:

[0045]

[0046]

[0047] First, dry the polylactic acid and PCL of the above raw materials in a vacuum oven at 80°C for 8 hours; then extrude and granulate through a twin-screw extruder. The temperature of the machine head is gradually increased, the speed of the feed screw is 15rpm, the speed of the main screw is 160rpm, and the cutting length is 3mm; the masterbatch is then injected into a standard spline through the injection molding machine, and the temperature of the injection molding machine is set at 160°C-190°C from the inlet The temperature from the feed section to the machine head is gradually increased, and the injection pressure is 40MPa; after testing, the tensile strength of the material is 115MPa, the elongation at break is 60%, the impact strength is 76J / m, and the Vicat softening point is 98°C.

Embodiment 2

[0049] The formula (percentage by weight) of a kind of fully degraded polylactic acid sheet of the present invention is as follows:

[0050]

[0051] First, dry the polylactic acid and PBAT of the above raw materials in a vacuum oven at 80°C for 8 hours, and dry the mica powder in a blast oven at 100°C for 8 hours; then extrude and granulate through a twin-screw extruder, and set the temperature of the extruder The temperature is 160°C-200°C, the temperature is gradually increased from the feed section to the machine head, the feed screw speed is 15rpm, the main screw speed is 160rpm, the cutting length is 4mm, and then the masterbatch is injected into a standard spline by the injection molding machine. The temperature of the injection molding machine is 160°C-190°C, the temperature gradually increases from the feed section to the head, and the injection pressure is 40MPa; after testing, the tensile strength of the material is 124MPa, the elongation at break is 53%, and the ...

Embodiment 3

[0053] The formula (percentage by weight) of a kind of fully degraded polylactic acid sheet of the present invention is as follows:

[0054]

[0055] First, dry the polylactic acid, PCL and PPC of the above raw materials in a vacuum oven at 80°C for 8 hours, and dry the talc powder in a blast oven at 100°C for 8 hours; then extrude and granulate through a twin-screw extruder, set the extrusion The temperature of the machine is 160°C-200°C, and the temperature gradually increases from the feed section to the machine head. The feed screw speed is 25rpm, the main screw speed is 150rpm, and the cutting length is 2mm; the masterbatch is then injected into a standard spline by the injection molding machine , set the temperature of the injection molding machine at 160°C-190°C, gradually increase the temperature from the feed section to the machine head, and the injection pressure is 40MPa; after testing, the tensile strength of the material is 81MPa, the elongation at break is 79%,...

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Abstract

The invention discloses a fully degradable polylactic acid sheet material with high strength and high-temperature resistance, and a preparation method thereof. The preparation method of the fully degradable polylactic acid sheet material comprises following steps: by mass, 50 to 78% of polylactic acid, 10 to 30% of a flexibilizer, 10 to 30% of an inorganic filling material, and 1 to 3% of other auxiliary agents are mixed uniformly; a mixed master batch is prepared by an extruder; and then the fully degradable polylactic acid sheet material is obtained using the extruder. According to the preparation method, polylactic acid is taken as a basic resin material, a fully biodegradable plastic with excellent flexibility is taken as the flexibilizer, the inorganic filling material is taken as a reinforcing agent, the other auxiliary agents comprise a coupling agent, an antioxidant, a lubricant and the like, so that heat resistance and toughness of polylactic acid are improved. The fully degradable polylactic acid sheet material can be used in packaging fields of foodstuff, cosmetic and electronic product. Compared with traditional petroleum based high-molecular materials, the fully degradable polylactic acid sheet material is friendly to the environment, and the base material is renewable; compared with common polylactic acid materials, the fully degradable polylactic acid sheet material possesses excellent toughness and heat resistance.

Description

technical field [0001] The invention relates to the field of biological materials, in particular to a high-strength, high-temperature-resistant fully degradable polylactic acid sheet and a preparation method thereof. Background technique [0002] At present, plastic products have penetrated into all fields of the national economy, and the annual consumption of plastic products in the world has reached 300 million tons. However, the environmental pollution and energy crisis brought about by the widespread use of plastics are also becoming more and more serious. The garbage produced by plastics has brought huge negative impacts on the earth's ecological environment, food security, and water resources. We know that plastic is a material that is polymerized by synthesis or condensation reaction using monomer raw materials. It is composed of synthetic resins and fillers, plasticizers, stabilizers, lubricants, colorants and other additives. .Plastic is easy to burn and produces t...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L69/00C08K13/04C08K13/02C08K7/14C08K7/10C08K3/34C08K5/5435C08K5/13C08K5/09C08K5/01B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92638B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92923
Inventor 苏源镇
Owner 深圳市江之源实业有限公司
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