Method for producing cellulose fiber-containing resin material

A technology of cellulose fibers and resin materials, which is applied in the field of thermoplastic resins, can solve the problems of undocumented organic solvent treatment methods, etc., and achieve the effect of improving heat resistance and tensile strength

Active Publication Date: 2012-04-18
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] As a microfibrillation method, for example, Patent Document 3 describes a production method of wet pulverization of cellulose in water or a solvent, but only describes an example of using water for wet pulverization, and does not describe a treatment method in the case of using an organic solvent.
In addition, the aqueous suspension of microfibrillated cellulose fibers is in a state of gel or wet wheat flour in a state of high concentration, and cannot be said to be a uniform dispersion.
[0011] In addition, Patent Document 4 describes a method of dispersing microfibrillated cellulose in an organic solvent, but water is used in the pulverization step of microfibrillating cellulose

Method used

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  • Method for producing cellulose fiber-containing resin material
  • Method for producing cellulose fiber-containing resin material
  • Method for producing cellulose fiber-containing resin material

Examples

Experimental program
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Effect test

Embodiment 1

[0237]

manufacture example 1

[0244] A sample produced in the same manner as in Comparative Example 1 was set as cellulose fiber D except that the number of revolutions of Comparative Example 1 was changed to 10,000 revolutions / minute, and the spinning was performed for 15 minutes. It was confirmed that the fiber was spun into an average fiber diameter of 200 nm and microfibrillated.

manufacture example 2

[0246] The aqueous dispersion of cellulose fibers D produced in Production Example 1 was filtered, washed with pure water, and dried at 70° C. to obtain cellulose fibers E.

[0247] Add 5 parts by mass of cellulose fiber E to 100 parts by mass of ethanol and 1 part by mass of pure water to disperse it, and add 5 parts by mass of tetraethoxysilane to the dispersion over 60 minutes while stirring at 50°C The mixture was then further stirred for 2 hours. The obtained cellulose fibers were confirmed to have an average fiber diameter of 200 nm from the results of observation with a scanning electron microscope. Let the obtained sample be cellulose fiber F.

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Abstract

Disclosed is a method for producing a highly transparent composite material, wherein MFC (microfibrillated cellulose) is uniformly dispersed in a thermoplastic resin, thereby improving the mechanical strength thereof and providing heat resistance thereto. A cellulose fiber dispersion liquid, in which cellulose fibers are uniformly dispersed, is produced by pulverizing cellulose into MFC at high concentration without gelatinizing the cellulose. Specifically disclosed is a method for producing a cellulose fiber-containing resin material that contains a thermoplastic resin and surface-treated cellulose fibers having an average fiber diameter of not less than 2 nm but not more than 200 nm. The method for producing a cellulose fiber-containing resin material is characterized by comprising a first mixing step in which the surface-treated cellulose fibers, an organic solvent and a first thermoplastic resin are mixed, and a second mixing step in which a second thermoplastic resin having a higher molecular weight than the first thermoplastic resin is additionally mixed into the resulting mixture.

Description

technical field [0001] The present invention relates to a technique for uniformly dispersing hydrophilic cellulose fibers in a hydrophobic thermoplastic resin, and a technique for uniformly dispersing cellulose fibers in an organic solvent. Background technique [0002] Fiber-reinforced composite materials that greatly increase strength and rigidity by incorporating various fibrous reinforcing materials into resins are used in a wide range of industrial fields such as electrics, electronics, machinery, automobiles, and building materials. As a fibrous reinforcing material blended in this fiber-reinforced composite material, glass fibers having excellent strength and lightness are mainly used. However, although glass fiber reinforced materials can achieve high rigidity, they increase the specific gravity, so there is a limit in terms of weight reduction. [0003] In contrast, fiber-reinforced materials composed of organic materials such as polyester fibers, polyamide fibers,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08J3/20C08L1/00
CPCC08J5/06C08L1/02
Inventor 伊原一仁藤野泰光
Owner KONICA MINOLTA INC
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