Full biodegradation plastic material and preparation method thereof

A biodegradable plastic and aliphatic polyester technology, applied in the field of fully biodegradable plastic materials and their preparation, can solve the problems of unsatisfactory dispersion and plasticizing effects, poor processing performance, etc., and achieve excellent blown film processing performance, Improvement of processability and improvement of flexibility

Inactive Publication Date: 2012-06-13
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of starch filler, its dispersion effect and plasticizing effect are not ideal during the processing o...

Method used

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  • Full biodegradation plastic material and preparation method thereof
  • Full biodegradation plastic material and preparation method thereof
  • Full biodegradation plastic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Weigh each component according to the following weight percentages:

[0055] PLA: 40

[0056] PBSA: 50

[0057] Calcium Carbonate: 5

[0058] DOA 3

[0059] Toluene diisocyanate 1

[0060] Bisphenol A phosphite 0.1

[0061] Dodecylthiopropyl ester 0.1

[0062] Zinc stearate 0.1

[0063] Oleamide 0.1

[0064] Ethylene bis stearamide 0.2

[0065] Calcium stearate 0.1

[0066] Talc powder 0.3

[0067] The preparation process is as follows:

[0068] Mix polylactic acid PLA and PBSA according to the ratio, put it in an oven, and dehumidify and dry at 50-80°C for 8 hours;

[0069] Put the dried mixture and various additives into the high-speed mixer according to the ratio and mix at high speed for 30s;

[0070] Use a weighing scale to accurately measure and feed the extruder;

[0071] The length-to-diameter ratio of the extruder is 40:1;

[0072] Extruder power and model: 65D model, co-rotating parallel twin-screw extruder;

[0073] The mixing te...

Embodiment 2

[0077] Weigh each component according to the following weight percentages:

[0078] PLA: 20

[0079] PBSA: 60

[0080] Calcium Carbonate: 9

[0081] DOA 7

[0082] Toluene diisocyanate 1

[0083] Bisphenol A phosphite 0.5

[0084] Dodecylthiopropyl ester 0.4

[0085] Zinc stearate 0.1

[0086] Oleamide 0.4

[0087] Ethylene bis stearamide 0.6

[0088] Calcium stearate 0.5

[0089] Talc powder 0.5

[0090] The preparation process is as follows:

[0091] Mix polylactic acid PLA and PBSA according to the ratio, put it in an oven, and dehumidify and dry at 50-80°C for 8 hours;

[0092] Put the dried mixture and various additives into the high-speed mixer according to the ratio and mix at high speed for 30s;

[0093] Use a weighing scale to accurately measure and feed the extruder;

[0094] The length-to-diameter ratio of the extruder is 60:1;

[0095] Extruder power and model: 75D model, co-rotating parallel twin-screw extruder;

[0096] The mixing temperature is ...

Embodiment 3

[0101] Weigh each component according to the following weight percentages:

[0102] PLA: 30

[0103] PBSA: 55

[0104] Calcium Carbonate: 2

[0105] DOA 6

[0106] Toluene diisocyanate 1

[0107] Bisphenol A phosphite 0.1

[0108] Dodecylthiopropyl ester 0.4

[0109] Zinc stearate 0.4

[0110] Oleamide 0.4

[0111] Ethylene bis stearamide 0.5

[0112] Calcium stearate 0.4

[0113]Talc powder 0.5

[0114] The preparation process is as follows:

[0115] Mix polylactic acid PLA and PBSA according to the ratio, put it in an oven, and dehumidify and dry at 50-80°C for 8 hours;

[0116] Put the dried mixture and various additives and fillers into the high-speed mixer according to the ratio and mix them at high speed for 30s;

[0117] Use weighing scales to accurately measure and feed materials such as extruders;

[0118] The length-to-diameter ratio of the extruder is 40:1;

[0119] Extruder power and model: 65D model, co-rotating parallel twin-screw extruder;

[...

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Abstract

The invention discloses a full biodegradation plastic material, which comprises, by weight, the polylactic acid 20-40%, the long-chain branch aliphatic polyester or long-chain branch aliphatic series-aromatic copolyesters 50-60%, the chain extender 0.1-3%, the filler 1-10%, the plasticizer 5-10%, the antioxygen 0.1-1%, the lubricant 0.1-1%, the stabilizer 0.1-1% and the nucleating agent 0.1-1%. A preparation method of the full biodegradation plastic material comprises the steps of enabling all components to be mixed in a high speed mixer, feeding in a twin-screw extruder after accurate measurement by means of a measurement scale to conduct squeezing-out and prilling to obtain the full biodegradation plastic material. The full biodegradation plastic material improves mechanical property of biodegradable plastic (PBSA) products by adjusting screw combination and extruding through reaction mixing and improves suppleness and degradation rate of the polylactic acid simultaneously, the obtained full biodegradation plastic material has not only excellent biodegradation performance and aging quality, but also excellent mechanical property and blow-film processability.

Description

technical field [0001] The invention relates to a fully biodegradable plastic material under composting conditions and a preparation method thereof. Background technique [0002] Aliphatic polyester resins that meet the biodegradability of composting conditions include poly α-hydroxyalkanoate (such as polylactic acid), poly β-hydroxyalkanoate (such as poly β-hydroxybutyrate, β-hydroxybutyrate ester-beta-hydroxyvalerate copolymer), polyomega-hydroxyalkanoates (such as polycaprolactate), and also copolyesters of dibasic acids and diols whose structure consists of even-numbered carbon It has better biodegradability under composting conditions when it is composed of dibasic acids and diols. Another type of polyester resin material that has a greater cost advantage is a type of aliphatic-aromatic copolyester material. [0003] Polylactic acid is obtained through starch fermentation, monomer polymerization and other processes. It is a kind of thermoplastic aliphatic polyester. I...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08K13/02C08K3/26C08K3/34C08K5/20C08K5/29C08K5/526B29C47/92B29C48/92
CPCB29C48/04B29C48/40
Inventor 钟宇科焦建苑仁旭赵崴徐依斌曾祥斌蔡彤旻夏世勇
Owner KINGFA SCI & TECH CO LTD
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