Fully biodegradable polyester material, and preparation method and application thereof

A technology of biodegradable polyester and polyester, applied in the field of biodegradable polyester materials, can solve the problems of high cost, achieve the effect of promoting melting, ensuring the mechanical properties of film materials, and excellent blown film processing performance

Active Publication Date: 2014-03-26
WUHAN JINFA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fully biodegradable polyester material modified by the existing technology has many problems, the first of which is the high cost. At present, it is generally recognized at home and abroad that due to the production process and raw material costs, the price of biodegradable plastics is higher than that of similar existing traditional plastic products. At the same time, in the industrial processing process, because of the two reaction processes of viscosification and degradation in the processing system, the aliphatic-aromatic copolyester is looking for a suitable processing technology and economical modification formula combination It has become a hot spot in the industry

Method used

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  • Fully biodegradable polyester material, and preparation method and application thereof
  • Fully biodegradable polyester material, and preparation method and application thereof
  • Fully biodegradable polyester material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: Preparation of fully biodegradable polyester material

[0051] Weigh each component (%) according to the following weight percentage:

[0052]

[0053] The preparation process is as follows:

[0054] Put PBSA in an oven, dehumidify and dry at 50-80°C for 8 hours, and control the moisture content below 300ppm;

[0055] Put the dried mixture and additives into the high-speed mixer according to the ratio and mix at high speed for 30s;

[0056] Use a metering scale to accurately meter and feed the extruder; the nozzle design see figure 1 .

[0057] The length-to-diameter ratio of the extruder is 60:1;

[0058] Extruder power and model: 65D model, co-rotating parallel twin-screw extruder;

[0059] The mixing temperature is as follows: 90-100°C for the first stage; 120-140°C for the second stage; 190-200°C for the third stage; 210-220°C for the fourth stage; 220°C; eight sections 210-220°C; nine sections 210-220°C; ten sections 210-220°C; eleven sectio...

Embodiment 2

[0076] Embodiment 2: Using the screw used in Example 1, adjust the amount of PBSA to prepare a fully biodegradable polyester material

[0077] Weigh each component (%) according to the following weight percentage:

[0078]

[0079] The preparation process is as follows:

[0080] Put PBSA in an oven, dehumidify and dry at 50-80°C for 8 hours, and control the moisture content below 300ppm;

[0081] Put the dried mixture and additives into the high-speed mixer according to the ratio and mix at high speed for 30s;

[0082] Use a weighing scale to accurately measure and feed the extruder;

[0083] The length-to-diameter ratio of the extruder is 60:1;

[0084] Extruder power and model: 65D model, co-rotating parallel twin-screw extruder;

[0085] The mixing temperature is as follows: 90-100°C for the first stage; 120-140°C for the second stage; 190-200°C for the third stage; 210-220°C for the fourth stage; 220°C; eight sections 210-220°C; nine sections 210-220°C; ten section...

Embodiment 3

[0102] Embodiment 3: Using the screw used in Example 1, adjust the amount of PBSA to prepare a fully biodegradable polyester material

[0103] Weigh each component (%) according to the following weight percentage:

[0104] Genuine PBSA 99.5

[0105] Toluene diisocyanate 0.5

[0106] The preparation process is as follows:

[0107] Put PBSA in an oven, dehumidify and dry at 50-80°C for 8 hours, and control the moisture content below 300ppm;

[0108] Put the dried mixture and additives into the high-speed mixer according to the ratio and mix at high speed for 30s;

[0109] Use a weighing scale to accurately measure and feed the extruder;

[0110] The length-to-diameter ratio of the extruder is 60:1;

[0111] Extruder power and model: 65D model, co-rotating parallel twin-screw extruder;

[0112] The mixing temperature is as follows: 90-100°C for the first stage; 120-140°C for the second stage; 190-200°C for the third stage; 210-220°C for the fourth stage; 220°C; eight secti...

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PUM

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Abstract

The invention belongs to the technical field of biodegradable polyester material, and discloses fully biodegradable polyester material in composting conditions, and a preparation method and the application thereof. The polyester material comprises the following constituents by mass percent: 93 to 99.5 percent of long chain branched polyester, 0.1 to 3 percent of a chain extender, 0.1 to 1 percent of an antioxidant, 0.1 to 1 percent of a lubricant, 0.1 to 1 percent of a stabilizer, and 0.1 to 1 percent of a nucleating agent. The material adopts the efficient chain extender to be mixed with aliphatic-aromatic copolyester and various types of additives, utilizes unique screw combination design and side feeding refueling design, improves the ageing property and the processing property of PBSA products, and meanwhile ensures that the fully biodegradable polyester material has excellent degradation property and aging property. The biodegradability of the material meets the use requirements of biodegradable plastics EN13432, and excellent membrane material mechanical property can be guaranteed after membrane blowing forming processing is performed.

Description

technical field [0001] The invention belongs to the technical field of biodegradable polyester materials, in particular to a polyester material that can be completely biodegraded under composting conditions, a preparation method and application 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 with a large cost advantage is a type of aliphatic-aromatic copolyester material, such as polybutylene succinate (PBS) or poly(butylene adipate / pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/02C08K3/34C08K5/29C08K5/526C08K5/372C08K5/098C08K5/20C08K5/353B29B9/06B29C47/08B29C47/64B29C48/57B29C48/40B29C48/54B29C48/55B29C48/67
CPCB29C48/54B29C48/55B29C48/57B29C48/40
Inventor 钟宇科焦建苑仁旭赵巍徐依斌曾祥斌蔡彤旻夏世勇
Owner WUHAN JINFA TECH CO LTD
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