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Preparation method of open-cell propylene polymer foamed beads

An expanded bead and propylene technology, which is applied in the field of preparation of open-cell propylene polymer expanded beads, can solve the problems of cumbersome process and high equipment requirements, and achieves simple process, high equipment requirements and high expansion ratio. control effect

Active Publication Date: 2022-03-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method for preparing open-celled propylene polymer foamed beads, which is to prepare open-celled propylene-based polymer foamed beads with controllable expansion ratio, simple process and controllable process by rapid pressure relief method , which solves the problems of high equipment requirements and cumbersome process in the preparation process of existing open-cell foam materials

Method used

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  • Preparation method of open-cell propylene polymer foamed beads
  • Preparation method of open-cell propylene polymer foamed beads
  • Preparation method of open-cell propylene polymer foamed beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Weigh 100 parts by weight of propylene polymer (85% by weight of propylene) and 25 parts by weight of barium sulfate, wherein the melting point of the propylene polymer is 147° C. and the particle size of barium sulfate is 1 μm.

[0080] The above-mentioned raw materials were mixed by a high-mixer and then added to a twin-screw extruder, and then pulled and pelletized by a pelletizer to obtain blended particles with a diameter of 1.0 mm and a length of 1.5 mm (length-diameter ratio of 1.5).

[0081] 1kg of the above-mentioned blended particles was placed in a 50L autoclave, 30L of water was added, 2.0MPa of carbon dioxide was introduced, and the reactor jacket was heated to 148°C with steam, and the opening of the unloading valve was controlled to 0.2MPa / The microparticles were released to atmospheric pressure at a pressure release rate of min, and cooled with water, dried, and dried in an oven at 80 °C for 8 hours. The obtained open-cell propylene polymer foam beads we...

Embodiment 2

[0083] Weigh 100 parts by weight of a propylene polymer (90% by weight of propylene) and 20 parts by weight of zinc borate, wherein the melting point of the propylene polymer is 150° C. and the particle size of the zinc borate is 2 μm.

[0084] The above-mentioned raw materials are mixed with a high-mixer and then added to a twin-screw extruder for heating and extrusion, and are pulled and pelletized by a pelletizer to obtain a total diameter of 0.9mm and a length of 1.3mm (length-diameter ratio is 1.44). Mixed particles.

[0085] 1kg of the above-mentioned particles was placed in a 50L autoclave, 30L of water was added, the carbon dioxide of 3.5MPa was introduced, and the water vapor was heated to 149° C. through the reactor jacket. The pressure rate of the particles was released to atmospheric pressure, and the particles were cooled by water, dried, and dried in an oven at 80 ° C for 8 hours. The obtained open-cell propylene polymer foam beads were recorded as sample 2#, and...

Embodiment 3

[0087] Weigh 100 parts by weight of a propylene polymer (80% by weight of propylene) and 50 parts by weight of calcium carbonate, wherein the melting point of the propylene polymer is 143° C. and the particle size of the calcium carbonate is 0.5 μm.

[0088] The above-mentioned raw materials are mixed with a high-speed mixer and then added to a twin-screw extruder for heating and extrusion, and are pulled and pelletized by a pelletizer to obtain a blended particle with a diameter of 1mm and a length of 1.5mm (length-diameter ratio is 1.5). .

[0089] 1kg of the above-mentioned particles was placed in a 50L autoclave, 30L of water was added, 1.8MPa of carbon dioxide was introduced, and the water vapor was heated to 142° C. by the reactor jacket. The pressure rate of the particles was released to atmospheric pressure, and the particles were cooled with water, dried, and dried in an oven at 80 ° C for 8 hours. The obtained open-cell propylene polymer foam beads were recorded as s...

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Abstract

The invention discloses a preparation method of open-cell propylene polymer foamed beads, which at least comprises the following steps: (1) uniformly mixing a mixture containing a propylene polymer and inorganic powder to prepare blended propylene polymer particles; and (2) placing the blended propylene polymer particles in an environment containing carbon dioxide and water, heating to the melting point of the propylene polymer, swelling and permeating, and cooling after pressure relief to obtain the open-cell propylene polymer foamed beads. The preparation method has the characteristics of simple process, controllable process and controllable expansion rate. And the prepared open-cell propylene polymer foamed beads are uniform in cells, have the effects of oil absorption, filtration and the like, and have a very good industrial application prospect.

Description

technical field [0001] The application relates to a preparation method of open-cell propylene polymer foam beads, belonging to the field of preparation of foamed propylene polymer materials. Background technique [0002] There are three main types of foams: polyurethane (PU), polystyrene (PS) and polyolefin foams. Foamed polyurethane has residues that are harmful to the human body during the foaming process, and cannot be recycled; foamed polystyrene has an irreversible impact on the environment due to "white pollution"; foamed polyethylene has poor heat resistance, application fields has been greatly restricted. [0003] Foamed propylene polymer materials have gradually become a good substitute for foamed polystyrene due to their light weight, heat insulation, shock absorption, good thermal stability, dimensional temperature, and high mechanical properties and degradability. , food, packaging, toys, construction, electrical appliances and other fields are widely used. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/14C08K3/30C08K3/38C08K3/26C08K3/34C08J9/18C08J9/12
CPCC08J9/18C08J9/122C08J9/0066C08J2323/14C08J2323/16C08K2003/3045C08K2003/387C08K2003/265C08K3/34C08K3/346C08J2203/06C08J2205/05
Inventor 蓝小琴吴飞崇云凯郑文革罗海斌汪龙
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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