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Degradable foaming material and preparation method thereof

A foaming material and foaming agent technology, applied in the field of foaming materials, can solve problems such as insufficient melt strength and difficult control of foaming agent decomposition

Inactive Publication Date: 2021-05-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims to solve the problems of insufficient melt strength of the degradable foaming material in the prior art, difficulty in controlling the decomposition of the foaming agent, etc., and provides a degradable foaming material with high melt strength. The foaming process of the foaming material Stable, easy to operate, excellent mechanical properties of the product

Method used

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  • Degradable foaming material and preparation method thereof
  • Degradable foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Take 10 parts of PBAT, 10 parts of PLA and 0.5 parts of glycerol triacetate to prepare modified particles through twin-screw extrusion granulation. The temperature of the feeding section of the twin-screw extruder is 160°C, and the temperature of the plasticizing section is 180°C. The homogenization section dimension is 190°C, and the extrusion die temperature is 180°C.

[0047] (2) Take 70 parts of PBAT, 10 parts of modified starch, 0.5 parts of chain extender ADR-4370S, 8 parts of AC foaming agent, 2 parts of auxiliary crosslinking agent, 0.7 part of antioxidant DLTDP, 0.7 part of antioxidant 1010 , 0.9 parts of zinc stearate lubricant was added to the banbury mixer, the banbury temperature was 110°C, and then the mixed material after banbury mixing was put into a single-screw extruder for extrusion and granulation to prepare foam masterbatches. The temperature of the first to third zones of the screw extruder is 110, 115, 120°C, and the die head temperature is 11...

Embodiment 2

[0051] (1) Take 30 parts of PBAT, 30 parts of PLA and 1.5 parts of glycerol triacetate to prepare modified particles through twin-screw granulation; The segment dimension was 190°C and the extrusion die temperature was 180°C.

[0052] (2) Take 30 parts of PBAT, 10 parts of modified starch, 0.5 parts of chain extender, 8 parts of AC foaming agent, 2 parts of co-crosslinking agent, 0.7 part of antioxidant DLTDP, 0.7 part of antioxidant 1010, 1 part The zinc stearate lubricant was added into the banbury mixer, and the banbury temperature was 115°C, and then the banbury mixed materials were put into a single-screw extruder for extrusion and granulation to prepare foam masterbatches. The temperatures of the first to third zones of the single-screw extruder are 110, 115, and 120°C, and the die head temperature is 110°C.

[0053] (3) Stir and blend the modified particles and the foam masterbatch with a stirrer at a stirring speed of 100 r / min. Coils were prepared by extruding throu...

Embodiment 3

[0057] (1) Take 40 parts of PBAT, 40 parts of PLA and 2 parts of glycerol triacetate to prepare modified particles through twin-screw granulation; The segment dimension was 190°C and the extrusion die temperature was 180°C.

[0058] (2) Take 20 parts of PBAT, 10 parts of thermoplastic starch masterbatch, 0.5 parts of chain extender ADR-4370S, 8 parts of AC foaming agent, 2 parts of crosslinking agent, 0.7 parts of antioxidant DLTDP, 0.7 parts of antioxidant 1010, 1.2 parts of zinc stearate lubricant was added to the internal mixer, the internal mixing temperature was 120°C, and then the mixed material after internal mixing was put into the single-screw extruder for extrusion and granulation to prepare foam masterbatch. The temperatures of the first to third zones of the single-screw extruder are 115, 120, and 125°C, and the die head temperature is 120°C.

[0059] (3) Stir and blend the modified particles and the foam masterbatch with a stirrer at a stirring speed of 100 r / min...

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Abstract

The invention relates to the technical field of foaming materials, and discloses a degradable foaming material and a preparation method thereof. The degradable foaming material is prepared from, by mass, 30-80 parts of poly(butylene adipate-co-terephthalate); 10-40 parts of polylactic acid; 10-40 parts of modified starch; 1-2 parts of a chain extender; 0.1-2 parts of a plasticizer; 1-4 parts of an assistant crosslinker; 0.1-1.5 parts of an antioxidant; 0.1-1.5 parts of a lubricant and 3-20 parts of a foaming agent. By blending and modifying PLA through PBAT, on one hand, the melting point of PLA can be remarkably reduced, the melt extrusion temperature during subsequent coiled material extrusion is further reduced, decomposition of a chemical foaming agent is inhibited, and decomposition of the foaming agent is completely controlled in the foaming stage of a high-temperature foaming furnace; and on the other hand, the advantages and disadvantages of PBAT and PLA materials are combined, and the degradable foaming material with excellent ductility, tensile strength and comprehensive performance is obtained.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a degradable foaming material and a preparation method thereof. Background technique [0002] High molecular polymer has become the fourth new basic material after steel, wood and cement due to its light weight, low cost and strong plasticity. However, many plastics mainly include plastic bags, plastic packaging, disposable polypropylene fast food boxes, plastic tableware cups and plates, and electrical filling foam fillers, plastic beverage bottles, yogurt cups, ice cream skins, etc., are discarded in large quantities after use. Non-degradability has caused a huge impact on the environment, forming "white pollution". Therefore, degradable plastics have emerged as the times require, and there is a huge demand to alleviate the impact on the environment. [0003] Polymer microcellular foaming material has the characteristics of light weight and porosity, because it is w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L3/04C08J9/10
CPCC08J9/103C08J9/105C08J9/0061C08J2203/04C08J2367/02C08J2467/04C08J2303/04
Inventor 杨晋涛
Owner ZHEJIANG UNIV OF TECH
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