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Bundled yarn, hydraulic composition and molded body

A technology of bundling and bundling agent, which is applied in the direction of adhesive type, fiber type, unsaturated alcohol copolymer adhesive, etc. The effect of high fiber opening rate

Active Publication Date: 2021-08-06
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is extremely difficult to make the fibers uniformly dispersed in the matrix. When the fibers and the hydraulic material are kneaded, there may be cases where the fibers are entangled with each other to form lumps (fiber balls). If lumps are formed, it is not easy Leverage the reinforcing effect of fiber

Method used

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  • Bundled yarn, hydraulic composition and molded body
  • Bundled yarn, hydraulic composition and molded body
  • Bundled yarn, hydraulic composition and molded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0154] Completely saponified PVA (manufactured by Kuraray Co., Ltd.) having a viscosity-average degree of polymerization of 1700 was dissolved in water at a concentration of 16.5% by mass, and 1.6% by mass of boric acid was added to the mass of the PVA to prepare a spinning dope. The spinning stock solution was wet-spun in a 70°C coagulation bath composed of 11 g / L of sodium hydroxide and 350 g / L of Glauber’s salt, followed by roll stretching, neutralization, wet heat stretching, water washing, and drying in accordance with the usual methods. Then, in the heat treatment process in the same fiber manufacturing process, dry heat stretching was performed at 235 degreeC so that the total draw ratio may become 19 times, and it winds up. As a result, PVA fiber 1 having an average fiber diameter of 14 μm and a tensile strength of 14 cN / dtex was obtained. After adding an aqueous solution containing the above-mentioned acrylic-modified PVA in an amount of 80 g / L to the obtained PVA fib...

Embodiment 2

[0156] Bundled yarn 2 was obtained in the same manner as in Example 1, except that PVA fiber 2 was used instead of PVA fiber 1, and the adhesion amount of acrylic-modified PVA 1 to PVA fiber 2 was changed as shown in Table 1.

Embodiment 3

[0158]Polypropylene ("Y2000GV" manufactured by Primepolymer Co., Ltd.) was fed into an extruder of a melt spinning device, melted and kneaded, and extruded from a spinneret to produce an undrawn yarn at a speed of 800 m / min. Then, the undrawn yarn was introduced into a hot air furnace at a temperature of 128° C. and drawn 4.6 times to obtain a PP fiber with an average fiber diameter of 17 μm and a fiber strength of 5.4 cN / dtex. A sizing agent was attached to the obtained PP fiber in the same manner as in Example 1, and then cut to obtain a sizing yarn 3 having an aspect ratio of 353.

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Abstract

The present invention relates to a bundled yarn which is obtained by integrating a plurality of fibers by means of a sizing agent, and which is configured such that the sizing agent is composed of a modified polyvinyl alcohol that has a saponification degree of 85% by mole or more and contains 0.1-10% by mole of a structural unit (X) that is derived from an unsaturated carboxylic acid or a derivative thereof if the total amount of all monomer units is taken as 100% by mole.

Description

technical field [0001] The present invention relates to a bundled yarn, a hydraulic composition, and a molded body. Background technique [0002] At present, it is known that in order to improve the mechanical strength such as bending strength and toughness of molded products (which are cured products of hydraulic materials represented by concrete and cement mortar), and to suppress cracks, etc., it is known that the matrix containing hydraulic materials is reinforced fiber. However, it is extremely difficult to make the fibers uniformly dispersed in the matrix. When the fibers and the hydraulic material are kneaded, there may be cases where the fibers are entangled with each other to form lumps (fiber balls). If lumps are formed, it is not easy Exhibits the reinforcing effect of fiber. [0003] As a technical means for solving the above-mentioned problems, for example, Patent Document 1 describes a bundled yarn reinforced with a water-soluble sizing agent, and the fiber o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/333C04B16/06C04B28/04C08L29/04D06M101/24
CPCD06M15/333C08F216/06C08F218/08C08F8/16C09D129/04C09J129/04C04B28/02D06M15/263D06M2101/24D06M2200/40Y02W30/91C08F220/06C04B14/06C04B16/0641C04B20/0068C08F8/12C04B7/02C04B16/065C04B2235/5212C04B2235/5268D02G3/045D10B2321/06D10B2321/08
Inventor 今川彰堀越敬史末森寿志岩崎嘉宏
Owner KURARAY CO LTD
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