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Full-degradable thermoplastic composite material and sheet thereof

A composite material, fully degradable technology, applied in the field of fully degradable thermoplastic composite materials, can solve the problems of incomplete biodegradation, low glass softening temperature, unsuitable processing, etc., and achieve the effect of strong promotion significance, low cost and energy saving.

Inactive Publication Date: 2010-08-18
任伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polypropylene carbonate (PPC) is polymerized by carbon dioxide and propylene oxide or ethylene oxide under the action of a catalyst. It is also a new degradable material, but its glass softening temperature is low, only 25 ° C, and it is not suitable for separate processing.
At present, there are many composite boards on the market, which are filled or modified with traditional plastics, and polymers such as starch or polylactic acid are added to PE, PP, or PET to improve their degradation performance, but in fact these plastic components in the material are Not completely biodegradable, the so-called degradation is only the apparent disintegration of the material, and it is not really converted into water and carbon dioxide for recycling

Method used

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  • Full-degradable thermoplastic composite material and sheet thereof
  • Full-degradable thermoplastic composite material and sheet thereof
  • Full-degradable thermoplastic composite material and sheet thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Embodiment 1: Preparation of fully degradable thermoplastic composite material and sheet of the present invention

[0107] Starch 25 kg PLA 55 kg PPC 12 kg

[0108] PBAT 5kg EAA 5kg Sorbitol 3.5kg

[0109] 8 kg of glycerin, 0.6 kg of liquid wax, 3 kg of zinc stearate

[0110] 4 kg calcium carbonate 1.2 kg monostearic acid

[0111] Put starch, PLA, PBAT, PPC and EAA into the mixer, pre-mix at room temperature for 6 minutes, and set the speed at 75 rpm; add the rest of the reaction aids, increase the temperature to 50 ° C, and increase the speed to 160 rpm, Mix at high speed for 8 minutes, discharge; mix and stir the materials evenly, put them into the twin-screw extruder, set the screw speed of each section at 120-800 rpm, set the temperature at 150-170°C, and control the vacuum degree of each section At 0.06-0.08Mpa, after melting, shearing, dispersing, rearranging, venting, plasticizing, extruding and cooling, the pellets of the fully degradable thermoplastic compos...

Embodiment 2

[0112] Put the prepared pellets into the tape casting machine, adjust the parameters of the die head and air knife, and go through melting, plasticizing, calendering, pulling, cooling and winding to obtain a fully degradable sheet with a thickness of 0.35mm. Embodiment 2: Preparation of fully degradable thermoplastic composite material and sheet of the present invention

[0113] Starch 25 kg PLA 45 kg PPC 9 kg

[0114] PBAT 6 kg EAA 4 kg Sorbitol 4 kg

[0115] Glycerin 8 kg Liquid wax 0.6 catties Zinc stearate 2.5 kg

[0116] Calcium Carbonate 5kg Glyceryl Monostearate 1.2kg

[0117] Put starch, PLA, PBAT, PPC and EAA into the mixer, pre-mix for 7 minutes at room temperature, and set the speed at 80 rpm; add the rest of the reaction aids, increase the temperature to 50 ° C, and increase the speed to 155 rpm, Mix at high speed for 10 minutes, discharge; mix and stir the materials evenly, put them into the twin-screw extruder, set the screw speed of each section at 120-800 rp...

Embodiment 3

[0119] Embodiment 3: Preparation of fully degradable thermoplastic composite material and sheet of the present invention

[0120] Starch 20 kg PLA 50 kg PPC 13 kg

[0121] PBAT 5kg EAA 5kg Sorbitol 3kg

[0122] 6 kg of glycerin, 0.8 kg of liquid wax, 3.5 kg of zinc stearate

[0123] Calcium carbonate 4 kg Glyceryl monostearate 0.8 kg

[0124] Put starch, PLA, PBAT, PPC and EAA into the mixer, pre-mix at room temperature for 6 minutes, and set the speed at 75 rpm; add the rest of the reaction aids, increase the temperature to 55 ° C, and increase the speed to 160 rpm, Mix at high speed for 9 minutes, discharge; mix and stir the materials evenly, put them into the twin-screw extruder, set the screw speed of each section at 120-800 rpm, set the temperature at 150-170°C, and control the vacuum degree of each section At 0.06-0.08Mpa, after melting, shearing, dispersing, rearranging, venting, plasticizing, extruding and cooling, the pellets of the fully degradable thermoplastic c...

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Abstract

The invention discloses a full-degradable thermoplastic composite material which is prepared from polylactic acid and starch which serve as base materials, PBAT and PCC, a sheet which is prepared from the material and is applicable to hot pressing and forming, and a preparation method thereof. The main components of the full-degradable thermoplastic composite material and the sheet of the invention are polylactic acid, starch and the like with biological sources, and the material and the sheet thereof can be degraded into water and carbon dioxide under the condition of compost, thereby saving a large amount of energy and reducing the environment pollution. The full-degradable thermoplastic composite material and the sheet thereof of the invention are mainly used for manufacturing sheets which are processed through plastic suction in the packaging industry, can be applied in the processing of disposable cups, disks, bowls, plates, boxes and the like through a plastics suction method, are widely applied to the packaging of food, vegetables, fruits, drinks, dairy food and industrial parts, and have stronger popularization significance.

Description

field of invention [0001] The invention relates to a fully degradable thermoplastic composite material and a sheet made of the material, in particular to a fully degradable thermoplastic composite material made of polylactic acid and starch, supplemented with PBAT and PCC, And the sheet prepared from the material suitable for thermoforming and its preparation method. Background technique [0002] All kinds of plastic products have been used in various industries for many years because of their high cost performance and convenient production and use, and have penetrated into all aspects of human production and life. Plastic sheets are mainly used to produce disposable plastic cups, plates, bowls, plates, boxes and other thermoplastic products, and are widely used in the packaging of food, vegetables, fruits, beverages, dairy products, industrial parts and other fields. Today, with the increasing development of science and technology and human awareness of environmental prote...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L3/02C08L69/00C08L67/02C08L23/08C08K13/02
Inventor 任伟孙阿嫔张成文
Owner 任伟
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