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Polylactic acid composite material sheet for plastic uptake and preparation method of sheet

A technology of composite material and polylactic acid, which is applied in the field of polylactic acid composite sheet for plastic absorption and its preparation, can solve the problems of poor melt viscoelasticity, small number of branched molecular chains, low melt viscosity and melt strength, etc. , to achieve the effects of easy processing and molding, excellent physical and chemical properties, and good biological and chemical degradation properties

Inactive Publication Date: 2015-09-02
常州龙骏天纯环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The number of molecular branches of PLA is small, the melt viscosity and melt strength are low, and the melt viscoelasticity is poor.

Method used

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  • Polylactic acid composite material sheet for plastic uptake and preparation method of sheet
  • Polylactic acid composite material sheet for plastic uptake and preparation method of sheet
  • Polylactic acid composite material sheet for plastic uptake and preparation method of sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw material components are:

[0023]

[0024] Mix starch and plasticizer evenly in proportion. The resulting mixture was stored sealed in a plastic bag. A single-screw extruder is used for extrusion molding, the screw temperature of the extruder is 85° C., and the screw speed is 160 rpm. The prepared thermoplastic starch granules were vacuum dried at room temperature for 12 h. PLA and antioxidant were vacuum-dried at 70°C for 15h, and cooled in vacuum. PBS particles were dried in a common blast drying oven at 60°C for 15h. Mix PLA, PBS, BPO and antioxidant in a high-speed blender according to the proportion. Then use a co-rotating twin-screw extruder to extrude and granulate. The temperature of each section of the extruder screw is: 80°C, 85°C, 90°C, 95°C, 105°C, 110°C, 105°C, and the screw speed is 180rpm. The obtained modified polylactic acid particles were vacuum dried at 60° C. for 18 h. The prepared thermoplastic starch granules and modified polylactic...

Embodiment 2

[0026] The raw material components are:

[0027]

[0028] Mix starch and plasticizer evenly in proportion. The resulting mixture was stored sealed in a plastic bag. A single-screw extruder is used for extrusion molding, the screw temperature of the extruder is 90° C., and the screw speed is 180 rpm. The prepared thermoplastic starch granules were vacuum dried at room temperature for 12 h. PLA and antioxidant were vacuum-dried at 70°C for 15h, and cooled in vacuum. PBS particles were dried in a common blast drying oven at 60°C for 15h. Mix PLA, PBS, BPO and antioxidant in a high-speed blender according to the proportion. Then use a co-rotating twin-screw extruder to extrude and granulate. The temperature of each section of the extruder screw is: 80°C, 90°C, 95°C, 100°C, 110°C, 115°C, 110°C, and the screw speed is 200rpm. The obtained modified polylactic acid particles were vacuum dried at 60° C. for 18 h. The prepared thermoplastic starch granules and modified polylacti...

Embodiment 3

[0030] The raw material components are:

[0031]

[0032]Mix starch and plasticizer evenly in proportion. The resulting mixture was stored sealed in a plastic bag. A single-screw extruder is used for extrusion molding, the screw temperature of the extruder is 95° C., and the screw speed is 200 rpm. The prepared thermoplastic starch granules were vacuum dried at room temperature for 12 h. PLA and antioxidant were vacuum-dried at 70°C for 15h, and cooled in vacuum. PBS particles were dried in a common blast drying oven at 60°C for 15h. Mix PLA, PBS, BPO and antioxidant in a high-speed blender according to the proportion. Then use a co-rotating twin-screw extruder to extrude and granulate. The temperature of each section of the extruder screw is: 85°C, 95°C, 100°C, 110°C, 120°C, 125°C, 120°C, and the screw speed is 220rpm. The obtained modified polylactic acid particles were vacuum dried at 60° C. for 18 h. The prepared thermoplastic starch granules and modified polylacti...

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Abstract

The invention discloses a polylactic acid composite material sheet for plastic uptake and a preparation method of the sheet. The composite material consists of the following components in parts by mass: 50-80 parts of polylactic acid, 10-30 parts of butylene succinate, 10-30 parts of starch, 0.5-1 part of dibenzoyl peroxide, 6-30 parts of a plasticizer and 0.3-2 parts of an antioxidant. The polylactic acid composite material sheet for plastic uptake is prepared by the following steps: respectively preparing thermoplastic starch granules and dibenzoyl peroxide (BPO) viscosity modified polylactic acid (PLA) / butylene succinate (PBS) composite granules by melt-blending; and then, carrying out melt extrusion and calendaring so as to prepare the polylactic acid composite material sheet for plastic uptake. Compared with conventional plastic, the polylactic acid composite material sheet for plastic uptake is excellent in physical and chemical properties, biological and chemical degradation performances, controllable in degradation time, free from toxicity and smell, acid-base resistant, germ-resistant, ultraviolet-proofing, easy in processing and forming, easy in degradation and capable of generating environment-friendly CO2 and H2O, and the like.

Description

technical field [0001] The invention relates to a polylactic acid composite material and a preparation method thereof, in particular to a polylactic acid composite material sheet for plastic absorption and a preparation method thereof. Background technique [0002] Plastic packaging sheets are mainly used to produce thermoformed products such as disposable plastic cups, plates, bowls, plates, boxes, etc., and are widely used in the packaging of food, vegetables, fruits, beverages, dairy products, industrial parts, etc. With the increasing domestic demand, the use of packaging plastic thermoforming sheets is becoming more and more extensive, and the consumption is also increasing year by year. The prospect is promising. With the country's emphasis on environmental protection, the "environmentally friendly degradable sheet production line" adapted to production has been able to successfully supply various types of "degradable sheet" to the market. The thermoplastic sheets use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L3/02C08K5/14C08K5/053C08K5/134B29C47/92B29C48/92
Inventor 支朝晖李炳健
Owner 常州龙骏天纯环保科技有限公司
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