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Sizing agent for carbon fibers, carbon fiber strand, and fiber-reinforced composite material

一种碳纤维、浆剂的技术，应用在碳纤维、纤维处理、薄料处理等方向，能够解决基体树脂浸渗、粘度高、无法表现出复合材料机械特性等问题，达到优异粘接性、优异物性的效果

Active Publication Date: 2014-06-25
MATSUMOTO YUSHI SEIYAKU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, thermoplastic matrix resins such as substantially nonpolar polyolefin resins may have higher viscosity when melted than thermosetting resins, and even if the sizing agent described in the prior art is used, it may be caused by wetting. Insufficient properties prevent the matrix resin from being sufficiently infiltrated into the fiber tow, and may fail to exhibit mechanical properties satisfactory as a composite material

Method used

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  • Sizing agent for carbon fibers, carbon fiber strand, and fiber-reinforced composite material
  • Sizing agent for carbon fibers, carbon fiber strand, and fiber-reinforced composite material
  • Sizing agent for carbon fibers, carbon fiber strand, and fiber-reinforced composite material

Examples

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Embodiment

[0110] Hereinafter, although an Example demonstrates this invention concretely, it is not limited to the Example described here. In addition, the percentage (%) shown in the following examples means "% by weight" unless otherwise specified. The measurement of each characteristic value was performed based on the method shown below.

[0111]

[0112] According to JIS-K7121, it measures with a differential scanning calorimeter (DSC) (JADE DSC LAB SYSTEM manufactured by Perkinelmer Instruments) under conditions of a sample weight of about 10 mg and a heating rate of 10° C. / min. Specifically, a sample accurately weighed at 10±1 mg was set in a differential scanning calorimeter, and the temperature was raised to the melting temperature Tm+30° C. of the sample confirmed by the pre-measurement. Then, the temperature was lowered to the glass transition temperature Tg-50°C confirmed by the prediction, and then the temperature was raised to 300°C at a heating rate of 10°C / min. In the...

manufacture example 10

[0153] In the autoclave equipped with stirring device, add maleic anhydride modified polyethylene resin (ethylene / maleic anhydride graft copolymerization ratio (weight%): 97.5 / 2.5, weight average molecular weight: 10000) 200 parts, oleyl alcohol polyoxygen 93 parts of ethylene (15) ether and 8 parts of potassium hydroxide were heated up to 170-180° C. under nitrogen reflux and stirring. Then, 699 parts of water were slowly poured in with stirring, and stirred at 170 to 180° C. for 2 hours to dissolve the contents uniformly. Thereafter, it was cooled to normal temperature, and water content was adjusted to obtain modified polyolefin resin PP-2 as an aqueous emulsion having a nonvolatile content of 30% by weight.

[0154] [Manufacturing example 11]

[0155] In the emulsifier, add bisphenol A type epoxy resin (Japan Epoxy Resin company system " JER (registered trademark) 1001 " 153 parts, liquid bisphenol A type epoxy resin (Japan Epoxy Resin company system " JER (registered tra...

Embodiment 1

[0160] The above-mentioned aromatic polyester resin PE-1 of Manufacturing Example 1 was diluted with water to prepare a sizing agent emulsion with a non-volatile component concentration of 15 wt%. , filament count 12000), after hot air drying at 105°C for 15 minutes, to obtain a sizing agent-treated carbon fiber tow with a theoretical adhesion of 5%. The wettability and adhesiveness of the matrix resin were evaluated for this tow by the method described above. The results are shown in Table 2.

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Abstract

The purpose of the present invention is to provide: a sizing agent for carbon fibers, which is capable of imparting excellent adhesiveness to carbon fibers that are used for the purpose of reinforcing a thermoplastic matrix resin; a carbon fiber strand which uses the sizing agent for carbon fibers; and a fiber-reinforced composite material. The present invention is a sizing agent for carbon fibers, which is used for the purpose of reinforcing a thermoplastic matrix resin. The sizing agent for carbon fibers essentially contains a polymer component that has a glass transition temperature of 20 DEG C or more and that does not have an endothermic peak having a melting endotherm based on crystal melting of 3 J / g or more as measured by a differential scanning calorimeter (DSC), and the weight ratio of the polymer component in all the non-volatile components of the sizing agent is 10-100% by weight. The polymer component is composed of at least one resin that is selected from among aromatic polyester resins, aromatic polyester urethane resins and amine-modified aromatic epoxy resins.

Description

technical field [0001] The present invention relates to a sizing agent for carbon fibers used for reinforcing a thermoplastic matrix resin, a carbon fiber tow using the same, and a fiber-reinforced composite material. More specifically, the present invention relates to a sizing agent for carbon fibers capable of imparting excellent adhesiveness to a thermoplastic matrix resin to carbon fiber strands, a carbon fiber strand using the same, and a fiber-reinforced composite material. Background technique [0002] Fiber-reinforced composite materials in which plastic materials (referred to as matrix resins) are reinforced with various synthetic fibers are widely used in automotive applications, aerospace applications, sports and leisure applications, and general industrial applications. Examples of fibers used in these composite materials include various inorganic fibers such as carbon fibers, glass fibers, and ceramic fibers, and various organic fibers such as aramid fibers, pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/507C08L23/26C08L101/12D06M15/227D06M15/263D06M15/55D06M15/572
CPCD06M15/55D06M15/507D06M15/568D06M15/572D06M15/263D06M2101/40C08L101/12D06M15/227D06M15/63C08J5/24C08J2300/22Y10T428/2918C08J5/06
Inventor 桥本善夫清水裕介中川干生
Owner MATSUMOTO YUSHI SEIYAKU
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