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Starch-based biodegradable material and its preparation method

A biodegradable and fully degradable technology, which is applied in the field of starch-based biodegradable materials and their preparation, can solve the problems of unsatisfactory physical and chemical hygiene indicators, poor weather resistance, etc., and achieve the effects of excellent mechanical properties, excellent flexibility, and simplified processes

Inactive Publication Date: 2004-09-01
WUHAN HUALI BIOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a product with excellent flexibility and mechanical properties, excellent water resistance, oil resistance and weather resistance, aiming at the defects of the above-mentioned products that cannot be completely degraded, materials with poor water resistance, oil resistance and weather resistance, and unsatisfactory physical and chemical hygiene indicators. Good, a starch-based biodegradable material that can be completely biodegradable to make up for the shortcomings of the above products

Method used

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  • Starch-based biodegradable material and its preparation method
  • Starch-based biodegradable material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1. Weigh 38Kg of 100-mesh cornstarch, 2Kg of konjac starch, and 1.84Kg of paraffin, and add them in turn to a special high-speed mixer preheated to 70°C, start stirring, and then add 0.12Kg of oleic acid and 0.12Kg of stearic acid , zinc stearate 0.34g, oleamide 0.53Kg, tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester 0.02Kg, continue to stir, wait for the material temperature in the mixer When the temperature rises to 110°C, add 10Kg of polycaprolactone, discharge into a low-speed cooling mixer, stir at low speed, cool, dehumidify, discharge, and pack;

[0046] Add the above powder into the intermeshing parallel co-rotating twin-screw extruder sheet. The unit temperature is 185-190°C, the die head temperature is 160°C, and the screw speed is 300rpm. Composition 0.74Kg. The extruded sheet is calendered, cooled, shaped, and rolled by a three-roller calender to produce a sheet with a thickness of 0.2-2.5mm, which is white, ...

Embodiment 2

[0047] Example 2: Weigh 40Kg of 100-mesh tapioca starch and 1.82Kg of paraffin, put them into a special heating high-speed mixer preheated to 70°C, start stirring, and add 0.52Kg of adipic acid, 0.42Kg of stearic acid, and 0.85 kg of caprolactam in turn. Kg, 0.13Kg of calcium stearate, 0.05Kg of 2,6-di-tert-butyl-4-methylphenol and continue to stir. When the temperature of the material in the mixer rises to 120°C, add 8Kg of polylactic acid, and the material is cooled and mixed at a low speed. Inside the machine, stirring at low speed, cooling, dehumidification, discharging and packaging.

[0048] Put the upper powder into the intermeshed parallel co-rotating twin-screw extrusion sheet unit, the temperature is 165-175 ° C, the die head temperature is 145 ° C, the screw speed is 300 rpm, and at the same time, inject methyl methacrylate and The composition of acetic anhydride is 0.75Kg, extruded sheet, through three-roller calender, calendered, cooled, shaped, and rolled to obta...

Embodiment 3

[0049] Embodiment three, get 40Kg of early rice starch of 100 orders, swell polyvinyl alcohol 2Kg with hot water, paraffin 1.32Kg, put into the special-purpose high-speed mixer that has been preheated to 70 ℃, start stirring, add stearic acid 0.20Kg successively, hard Zinc fatty acid 0.12Kg, calcium stearate 0.65Kg, oleic acid 0.05Kg, oleamide 0.50Kg, 2,6-di-tert-butyl-4-cresol 0.02Kg Continue to stir until the temperature of the material in the mixer rises to 110°C When the temperature is high, the material is discharged into a low-speed cooling mixer, stirred at a low speed, cooled, dehumidified, discharged, and packaged.

[0050] Put the above powder into the special twin-screw extrusion sheet unit, the temperature is 165-175°C, the die head temperature is 140°C, the screw speed is 300rpm, and at the same time, 1.20Kg of acrylamide is uniformly injected into the second liquid feeding port, and the sheet is extruded. Three-roll calender, calendering, cooling, shaping, windin...

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Abstract

The present invention discloses a starch base biological completely-degradable material and its preparation method. It is formed from (wt%) 65-95% of plant starch, 1-15% of reaction type adjuvant and 1-30% of bio-degradable polymer compound. Its preparation method includes the following steps: 1). adding the plant starch and reaction type adjuvant into high-speed mixing machine for mixing; 2). heating to 80-200 deg.C and adding the degradable synthetic polymer compound; 3). cooling, discharging material to obtain power material; 4). adding the above-mentioned powder material into screw extruder, and adding reaction type adjuvant at 120-230 deg.C, extruding sheet material, press finishing, cooling and forming so as to implement said invention. It can implement two reaction process of "reaction type plasticization" and "reaction type compatibilization" simultaneously in special equipoment to directly extrude the sheet material with 0.2-2.5 mm thick ness. Said material is non-toxic and harmless, and possesses exteisve application.

Description

technical field [0001] The invention relates to a degradable material and a preparation method thereof, in particular to a starch-based biodegradable material and a preparation method thereof. Background technique [0002] "Developing green industries, establishing green enterprises, producing green products, providing green services, and advocating green consumption" is the main theme of the 21st century. Population, resources, and environment are the three major issues facing the sustainable development of today's society. Realizing the sustainable development of population, economy, society, environment, and resources has become the basic national policy of all countries in the world. In this context, "ecological environment materials" came into being. "Eco-environmental materials" are the sixth generation of materials after "natural materials", "metal materials", "synthetic materials", "composite materials" and "smart materials" in human history,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/00C08L3/00
CPCC08L3/00C08K5/0033C08L2666/02C08L2666/28C08K5/09C08L3/02C08L77/00C08L91/06
Inventor 王世和张先炳
Owner WUHAN HUALI BIOLOGY CO LTD
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