Reinforcing short fiber for cement molding

A technology for forming bodies and short fibers, applied in the directions of fiber processing, fiber chemical characteristics, filament/thread forming, etc., can solve the problems of unable to obtain reinforced short fibers, insufficient fiber opening, etc.

Inactive Publication Date: 2009-08-26
UBE NITTO KASEI CO LTD
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, fibers with irregularities on the fiber surface may not be sufficiently opened due to pulling between fibers, etc., and may cause problems in uniform dispersion in cement-based molded products.
[0011] As described above, for polyolefin-based fibers having advantages in alkali resistance, light weight, etc., it is not yet possible to obtain practically satisfactory reinforcing short fibers for cement-based molded articles.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reinforcing short fiber for cement molding
  • Reinforcing short fiber for cement molding
  • Reinforcing short fiber for cement molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Using a single-axis melt extruder equipped with a nozzle with 16 holes and an X-shaped hole, the isotactic polypropylene resin (WF464N, manufactured by Sumitomo Chemical) with MFR = 2g / 10 minutes was extruded at a temperature of 255°C In melt extrusion, the extruded resin is put into a cooling water tank, and while it is solidified, it is drawn out at a constant speed with 5 parallel stretching rolls. The drawn fiber strands were directly and continuously put into a 95°C hot water heating drawing tank, and stretched 6.9 times by the second drawing roll. Then, it was put into a steam-heated stretching tank at 120° C., and stretched to 1.74 times with a third stretching roll to perform a two-stage stretching of 12 times in total.

[0087] Next, use a pair of upper and lower file pattern embossing rolls (φ101mm, width 160mm, circumferential convexity interval 2.93mm, width convexity interval 1.33mm, convexity height 0.9mm, and the tip of the convexity The shape is a rhombus wi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Finenessaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Fiber lengthaaaaaaaaaa
Login to view more

Abstract

A reinforcing short fiber for cement molding, consisting of an oriented fiber composed mainly of a synthetic resin, which fiber in its cross-section configuration is roughly a polygon having three or more projecting portions, at least one side portion of the polygon provided with depressed portions with given intervals along the longitudinal direction of the fiber. The reinforcing short fiber for cement molding, as a reinforcing short fiber for cement molding in civil engineering, construction work, etc., has satisfactory fixing power with cement paste and, at charging and mixing, exhibits good spreadability and good dispersibility in concrete.

Description

Technical field [0001] The present invention relates to synthetic resin reinforced short fibers for cement-based molded bodies. In more detail, it relates to cement-based moldings for civil engineering, construction engineering, etc., particularly suitable for preventing the generation of concrete cracks and preventing the subsequent peeling and spalling of concrete blocks. Reinforce short fibers. Background technique [0002] Conventionally, as reinforcing fibers for cement-based molded bodies such as mortar and concrete, organic fibers such as steel fibers, vinylon, and polypropylene are known. [0003] Recently, especially because it is rust-free, excellent in cement alkali resistance, and has the smallest specific gravity among synthetic fibers, the cost advantage that the mass ratio mixing rate in the cement molded body is minimized has been brought into play. Attention has been paid to the use of concrete as the lining of tunnels, and its effectiveness is increasing. [000...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B16/06D01F6/00D01D4/02D01F6/04D01D5/253D01F6/06
CPCC04B16/06C04B28/02D01F6/06D01D5/253
Inventor 福田直也石井德目黑祐树太田信次高桥秀树新谷寿教椎名贵快仓林清田中彻清水阳一郎
Owner UBE NITTO KASEI CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap