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Preparation method of high-resilience biodegradable polyester micro-foamed profiled bar

A technology of degrading polyester and high resilience is applied in the field of biodegradable polyester materials, which can solve the problem that the thermal stability of beads and the open porosity affect the water vapor forming ability of PBAT foam particles, and it is difficult to meet the requirements of high elastic foam materials. Application fields, poor mechanical properties of the molded body, etc., to achieve the effect of improving the secondary setting ability, high rebound rate, and improving elasticity and other properties

Pending Publication Date: 2021-04-27
ANTA CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the prior art, PBAT expanded particles need to be steam-molded to prepare special-shaped molding materials, and the thermal stability and porosity of beads affect the steam-molded ability of PBAT expanded particles
Due to the existence of the bead interface, the molded body has defects and poor mechanical properties, and the elasticity is poor, which is difficult to meet the application fields of high elastic foaming materials

Method used

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  • Preparation method of high-resilience biodegradable polyester micro-foamed profiled bar

Examples

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preparation example Construction

[0021] The invention provides a method for preparing a high-resilience biodegradable polyester foam profile, comprising the following steps:

[0022] S1. After mixing PBAT resin, nucleating agent and chain extender, extrude and pelletize to obtain PBAT modified material; the chain extender is one or more of trifunctional epoxy compounds and tetrafunctional epoxy compounds kind;

[0023] S2. The PBAT modified material is made into a PBAT sheet, then saturated with a high-pressure fluid, and quickly released for foaming to obtain a PBAT foamed sheet;

[0024] S3. Heat-treating the PBAT foamed sheet through a mold to obtain a PBAT foamed profile.

[0025] Through the method of the invention, a biodegradable polyester foam profile with low density, good mechanical properties, high rebound rate and low compression set can be prepared, which is beneficial to the application in the field of high elastic foam materials.

[0026] In order to achieve the above purpose, in the embodime...

Embodiment 1

[0040] With 95wt% PBAT particles (melt index is 3.5g / 10min), 4.5wt% talcum powder nucleating agent, 0.2wt% 3 functional group epoxy (chain extender ADR4400), 0.3wt% antioxidant AT-10 Mix, obtain the modified PBAT particle that melt index is 1.0g / 10min through twin-screw pelletizing; With described modified PBAT particle injection molding, obtain the PBAT sheet material that thickness is 5mm; Put this PBAT sheet material into pressure and be 15MPa, temperature is CO at 105°C 2 Saturation in the fluid for 60 minutes, after rapid pressure relief (the pressure relief rate is about 15MPa / s, the same as the following examples), foam to obtain a PBAT foam sheet; put the PBAT foam sheet into a shoe material mold with a temperature of 160 degrees , molded for 3min, and obtained PBAT foamed shoe material through water cooling and rapid cooling, and the thickness of the foamed shoe material is 20mm (the following examples are the same).

[0041] The test results are shown in Table 1: th...

Embodiment 2

[0046] The PBAT particle (melt index is 3.5g / 10min) of 95wt%, the talcum powder nucleating agent of 4.2wt%, the 3 functional group epoxy chain extender ADR4400 of 0.5wt%, the antioxidant AT-10 of 0.3wt% mix, The modified PBAT pellets with a melting index of 0.2g / 10min were obtained by twin-screw pelletizing; the modified PBAT pellets were injected to obtain a PBAT sheet with a thickness of 5mm; the PBAT sheet was placed in a pressure of 20MPa and a temperature of 110°C CO 2 Saturation in the fluid for 60 minutes, rapid pressure relief, foaming to obtain PBAT foamed sheet; put the PBAT foamed sheet into a shoe material mold at a temperature of 170 degrees, mold for 3 minutes, and rapidly cool to obtain PBAT foamed shoe material.

[0047] The test results are shown in Table 1: the density of the PBAT foam board is 0.12g / cm 3 , the density of PBAT foam profile is 0.15g / cm 3 , The hardness of the PBAT foam profile is 42 Shore C, the rebound rate is 55%, the compression set is 50...

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Abstract

The invention provides a preparation method of a high-resilience biodegradable polyester foamed profiled bar, which comprises the following steps of: S1, mixing PBAT resin, a nucleating agent and a chain extender, and carrying out extrusion granulation to obtain a PBAT modified material, the chain extender being one or more of a trifunctional epoxy compound and a tetrafunctional epoxy compound; S2, preparing the PBAT modified material into a PBAT plate, and then performing high-pressure fluid saturation and rapid pressure relief foaming to obtain a PBAT foamed plate; and S3, carrying out heat treatment on the PBAT foamed plate through a mold to obtain the PBAT foamed profiled bar. The preparation method disclosed by the invention is simple in process, can be used for preparing a biodegradable high-performance foamed profiled bar material with a complex shape, and can be applied to the fields of sports protection, foamed shoe materials, cushion packaging and the like.

Description

technical field [0001] The invention relates to the technical field of biodegradable polyester materials, in particular to a method for preparing high-resilience biodegradable polyester micro-foamed profiles. Background technique [0002] Polymer flexible foam materials such as polyurethane (PU) foam, ethylene vinyl acetate copolymer (EVA) foam, and foamed thermoplastic polyurethane (ETPU) bead materials have been widely used in sports protection, shoe materials and other fields. The molecular chains of PU and EVA foam materials are cross-linked and cannot be melted and recycled; the molecular chains of ETPU beads and their molding materials are not cross-linked and can be 100% melted and recycled. However, the above-mentioned materials cannot be degraded by the environment after being discarded into the environment after use, which may easily cause white pollution problems. In order to standardize the recycling of foam packaging materials, governments at home and abroad ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L67/02C08L101/06C08K3/34C08K5/134
CPCC08J9/122C08J9/0061C08J9/0066C08J9/0023C08J9/0095C08J2203/06C08J2400/104C08K3/34C08K5/1345
Inventor 熊祖江王有承刘艺龙
Owner ANTA CHINA
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