Polyolefin resin foam particle, preparation method thereof and polyolefin resin foam forming body

A technology of polyolefin resin and foam particles, which is applied in the field of polyolefin resin foam moldings, can solve the problems of obvious surface wrinkles, deterioration of surface appearance, and increased foaming rate of foam particles, so as to reduce environmental load, good looking effect

Inactive Publication Date: 2019-10-11
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when a large amount of synthetic zeolite and / or natural zeolite is added, the continuous foam ratio of the foamed particles will increase and the expansion ratio will be relatively low. Problems that become apparent and deteriorate the surface appearance

Method used

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  • Polyolefin resin foam particle, preparation method thereof and polyolefin resin foam forming body

Examples

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preparation example Construction

[0052]

[0053] As a method of manufacturing the polyolefin-type resin particle in this invention, the following manufacturing process (it is also called a "granulation process") is mentioned, for example. First, the polyolefin-based resin and, if necessary, additives such as silver-based zeolite are blended by a mixing method such as a dry blending method or a masterbatch method. Next, the resulting mixture is melt-kneaded using an extruder, kneader, Banbury mixer, etc., extruded, and chopped using a cutter, granulator, etc., into cylindrical, oval, or spherical shapes. Polyolefin-based resin particles having desired shapes such as cubes and cuboids. Alternatively, the blend may be cut into pellets and cooled immediately after extruding the above-mentioned blend into water directly from a die.

[0054] Without limitation, in one embodiment of the invention a method using an extruder such as a twin screw extruder. Specifically, silver-based zeolite additives, foaming nucle...

Embodiment 1

[0115] [Preparation of polyolefin-based resin particles]

[0116] Get 100 parts by weight of polypropylene resin composition a (ethylene content 3.0% by weight, MI=6g / 10min, melting point is 144 ° C), add 0.5 parts by weight of silver zeolite (manufactured by Fuji Chemical Industry Co., Ltd.) with an average particle diameter of 2 μm , BM-102NS, hereinafter referred to as A), it was dry mixed. Then put the mixture obtained by dry mixing into a twin-screw extruder, melt and knead it at a cylinder temperature of about 220°C, and extrude it into a linear shape through a cylindrical die with a diameter of 1.6 mm installed at the front end of the extruder, and water-cooled After that, it was cut with a cutter to obtain polypropylene-based resin pellets. The average particle weight of the polypropylene-based resin particles was 1.2 mg.

[0117] [Preparation of polyolefin-based resin expanded particles]

[0118] In a capacity of 0.3m 3 100 parts by weight of the obtained polyprop...

Embodiment 2

[0123] Except for using silver-zinc zeolite (manufactured by Fuji Chemical Industry Co., Ltd., BM-102NSC, hereinafter referred to as B) with an average particle diameter of 1.5 μm instead of A, the preparation of resin particles and the preparation of resin foamed particles were carried out in the same manner as in Example 1. and in-mold foam molding. Table 1 shows the evaluation results of the expanded polypropylene resin particles and the expanded polypropylene resin molded article.

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Abstract

The invention provides a polyolefin resin foam particle, a manufacturing method thereof and a polyolefin resin foam forming body. The polyolefin resin foam particle comprises polyolefin resin and silver zeolite serving as an additive. Foam performance of the polyolefin resin foam particle is good, and the light polyolefin resin foam particle with good foam effect can be acquired even if additivessuch as polyethylene glycol and glycerin cannot be used. When the silver zeolite serves as the additive for manufacturing the polyolefin resin foam particle, wastewater treatment can be decreased or omitted, environmental loads in manufacturing are decreased, and in-mold forming performance of the acquired foam particle is good.

Description

technical field [0001] The present invention relates to a polyolefin resin foamed particle, a method for producing the foamed particle, and a polyolefin resin foamed molded body obtained by in-mold foaming the polyolefin resin foamed particle, which belongs to the polymer foam Foam technology field. Background technique [0002] Polyolefin-based resin foamed molded products are lighter than unfoamed molded products, so they are widely used in cushioning packaging materials, recyclable containers, thermal insulation transportation containers (such as seafood transportation boxes, takeaway transportation boxes, etc.), automotive parts (such as , Toolbox, floor core material, etc.) etc. [0003] When the existing production method uses water and / or carbon dioxide as foaming agent to produce expanded polyolefin resin particles, in order to reduce weight, it is necessary to add hydrophilic organic additives such as polyethylene glycol and glycerin. When organic additives are us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K7/26C08J9/12
CPCC08J9/125C08J9/122C08J9/0066C08K2201/003C08J2323/12C08J2203/06C08L23/12C08K7/26C08J9/12C08J9/18Y02P20/50
Inventor 福泽淳
Owner KANEKA CORP
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