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PBAT foamed bead and preparation method thereof

A technology of foaming beads and foaming masterbatch, which is applied in the field of foaming materials and can solve problems such as low production efficiency, high foaming conditions, and poor uniformity of beads

Pending Publication Date: 2022-07-08
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN13549305A discloses a process for molding PBAT foamed sheets, but its foaming conditions are relatively high, and the relatively suitable foaming temperature, foaming pressure and holding time are 120°C, 9MPa, and 3h respectively, and its production low efficiency
Chinese patent CN102229707A discloses a foaming process of chain-extended PBAT anhydrous molded beads, which can realize high-magnification foaming of anhydrous beads, but the uniformity of the beads in the anhydrous medium is poor after expansion, and the foamed beads adopt There is serious hydrolysis phenomenon in the preparation of products by steam forming process

Method used

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  • PBAT foamed bead and preparation method thereof
  • PBAT foamed bead and preparation method thereof
  • PBAT foamed bead and preparation method thereof

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preparation example Construction

[0035] The invention provides a preparation method of PBAT foam beads, comprising the following steps:

[0036] A) mixing PBAT resin, cell nucleating agent, anti-hydrolysis agent, chain extender, compatibilizer and auxiliary agent, extruding and dicing to obtain PBAT foaming master batch;

[0037] The mass ratio of the PBAT resin, cell nucleating agent, anti-hydrolysis agent, chain extender, compatibilizer and auxiliary agent is 50-100:0.1-10:0.01-10:0-5:0-5:0.01 ~10;

[0038] B) Stir and mix the PBAT foaming master batch, dispersant and water, and at 60-130° C., feed a physical foaming agent into the agitated and mixed feed until the pressure of the system is 1-20 MPa , maintain constant temperature and pressure for 20-120min;

[0039] C) The system in step B) is depressurized, cooled and dried to obtain PBAT expanded beads.

[0040] In the present invention, the PBAT resin, the cell nucleating agent, the anti-hydrolysis agent, the chain extender, the compatibilizer and th...

Embodiment 1

[0078] The density of PBAT resin is 1.28g / cm 3 , the melt index is 7.9g / 10min (2.16kg, 190℃), the melting temperature is 127.5℃; the particle size of the cell nucleating agent talc is 9.8~10.2μm;

[0079] 1) 100 parts by weight of the PBAT resin, 0.5 part by weight of cell nucleating agent talc, 0.5 part by weight of anti-hydrolysis agent Bio-SW100, 0.6 part by weight of chain extender ADR4370S, 0.01 part by weight of silane coupling agent KH550, 0.05 parts by weight of erucic acid amide and 0.1 part by weight of heat-resistant modified agent 511 were dried in a blast drying oven at 80°C for 8 hours, then put into a high-speed mixer and fully mixed, and then put into a twin-screw extruder for extrusion , wire drawing and pelletizing to prepare PBAT foam masterbatch with a diameter of 0.8-1.2mm;

[0080] The rotation speed of the extrusion is 120r / min, and it is divided into one to six zones in turn from the feeding port to the die head, and the temperatures are respectively s...

Embodiment 2

[0088] The density of PBAT resin is 1.2g / cm 3 , the melt index is 4.13g / 10min (2.16kg, 190°C), and the melting temperature is 120.4°C; the particle size of the cell nucleating agent talc is 9.8-10.2 μm; the particle size of the cell nucleating agent silica is 0.2~0.3μm;

[0089] 1) 100 parts by weight of the PBAT resin, 0.4 part by weight of cell nucleating agent talc, 0.2 part by weight of silicon dioxide, a cell nucleating agent, 0.5 part by weight of anti-hydrolysis agent Bio-SW 100, and 0.5 part by weight of chain extender ADR4370S parts by weight, 0.05 part by weight of auxiliary oleic acid amide and 0.05 part by weight of glycerol monostearate, after drying at 80°C for 8 hours in a blast drying oven, put into a high-speed mixer and fully mixed, and then enter a twin-screw extruder Extrusion, wire drawing and pelletizing are carried out inside to prepare PBAT foamed masterbatch with a diameter of 0.8-1.2 mm;

[0090] The rotation speed of the extrusion is 120r / min, and ...

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Abstract

The invention relates to the technical field of foaming materials, in particular to PBAT foaming beads and a preparation method thereof. The preparation method comprises the following steps: A) uniformly mixing PBAT resin, a cellular nucleating agent, an anti-hydrolysis agent, a chain extender, a compatilizer and an auxiliary agent according to a mass ratio of (50-100): (0.1-10): (0.01-10): (0-5): (0-5): (0.01-10), extruding and pelletizing to obtain PBAT foaming master batches; b) stirring and mixing PBAT foaming master batches, a dispersing agent and water, introducing a physical foaming agent into the stirred and mixed material liquid at 60-130 DEG C until the pressure of the system is 1-20 MPa, and maintaining the constant temperature and the constant pressure for 20-120 minutes; and C) releasing the pressure of the system in the step B), cooling and drying to obtain the PBAT foamed beads. The PBAT foamed bead is smooth and flat in surface, free of surface hydrolysis under high-temperature and high-pressure foaming conditions, small in retraction rate and excellent in rebound resilience.

Description

technical field [0001] The invention relates to the technical field of foamed materials, in particular to a PBAT foamed bead and a preparation method thereof. Background technique [0002] As the most effective way to solve white pollution, the application of biodegradable materials has attracted more and more attention, especially in the fields of disposable tableware and packaging. Therefore, the application of fully biodegradable foam materials in disposable tableware, packaging and transportation, daily necessities and other industries has become a research focus of future foam materials. [0003] PBAT is a polyadipate / butylene terephthalate copolymer, which combines the excellent degradation properties of aliphatic polyesters and the good mechanical properties of aromatic polyesters. alternatives. Thanks to the benzene ring structure, the tear strength and impact strength of PBAT are higher than that of polyethylene, and its molecular thermal stability is high, the de...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K3/34C08K5/544C08K5/20C08J9/12C08J9/00
CPCC08J9/122C08J9/0095C08J9/0066C08J2367/02C08K3/34C08K5/544C08K5/20C08J2203/06Y02W90/10
Inventor 崔丽云王奇孙浩杰杨熙舒孟鑫吴文雷
Owner CHAMBROAD CHEM IND RES INST CO LTD
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