Porous polypropylene modified fiber for antiexplosive concrete

A technology of modifying fiber and polypropylene, applied in the direction of single-component polypropylene rayon, fiber processing, filament/thread forming, etc., to achieve the effect of easy cleaning, meeting special needs, and improving anti-cracking properties

Inactive Publication Date: 2007-01-03
SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technology does not involve how to prevent the bursting of concrete, and for buildings, underground facilities, cement concrete and mortar layers, it is very important to avoid concrete blasting and fragmentation after high temperature, and to maintain the integrity of concrete components, so as to prevent cracking after bursting. Fragments cause harm to the human body

Method used

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  • Porous polypropylene modified fiber for antiexplosive concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Raw material: Polypropylene chips Melt index: 16

[0028] Additive 1: Ethylene bis stearic acid amide

[0029] 0.25% by weight of polypropylene

[0030] Additive 2: Manganese oxide (inorganic ceramic powder)

[0031] 2.6% by weight of polypropylene

[0032] Blending time: 15 minutes, blending method: rotary drum stirring

[0033] Number of spinning holes: Four holes Slit form: Type C: Gap: 0.08mm

[0034] Temperature in each zone of the screw (°C): Zone 1 Zone 2 Zone 3 Zone 4 Elbow flange zone

[0035] 190 205 210 205 198

[0036] Spinning temperature: 210℃

[0037] Blowing speed: 0.38m / s

[0038] Blowing point board distance: 18cm

[0039] Blowing temperature: 20°C

[0040] Spinning and winding speed: 860m / min

[0041] Total post-stretch ratio: 8.8 times

[0042] Hot plate temperature: 56°C

[0043] Hot plate temperature I: 105°C

[0044] Hot plate temperature II: 115°C

[0045] Hollowness: 12%

[004...

Embodiment 2

[0050] Raw material: Polypropylene chips Melt index: 20

[0051] Additive: Ethylene bisstearic acid amine (0.18% by weight of polypropylene chips)

[0052] Additive: Zirconia (inorganic ceramic powder) 2.2% based on the total weight of polypropylene slices

[0053] Blending time: 15 minutes Blending method: rotary drum stirring

[0054] Number of holes: Five holes Slit combination: Four-arc C-type Gap: 0.06mm

[0055] The temperature of each zone of the screw ℃: Zone 1 Zone 2 Zone 3 Zone 4 Elbow flange zone

[0056] 185 190 205 200 198

[0057] Spinning temperature: 205℃

[0058] Blowing speed: 0.40m / s

[0059] Blowing point board distance: 20cm

[0060] Blowing temperature: 18°C

[0061] Spinning and winding speed: 960m / min

[0062] Total post-stretch ratio: 8.4

[0063] Hot plate temperature: 55°C

[0064] Hot plate temperature I: 102°C

[0065] Hot plate temperature II: 110°C

[0066] Hollowness: 15%

[0067] Porosity: 100%

[0068] Tensile strength: 560MPa

[...

Embodiment 3

[0071] Raw Material: Polypropylene Chips Melt Index 25

[0072] Additive 1: Propylene bis stearic acid amide (0.16% by weight of polypropylene chips)

[0073] Additive 2: Zirconia (inorganic ceramic micropowder, 2.0% by weight of polypropylene chips)

[0074] Blending time: 15 minutes Blending method: rotary drum stirring

[0075] Number of holes: seven holes Slit combination: hexagonal arc C-type Gap: 0.04mm

[0076] The temperature of each zone of the screw ℃: Zone 1 Zone 2 Zone 3 Zone 4 Elbow flange zone

[0077] 182 195 205 200 202

[0078] Spinning temperature: 198°C

[0079] Blowing speed: 0.52m / s

[0080] Blowing point board distance: 18cm

[0081] Blowing temperature: 16°C

[0082] Spinning and winding speed: 900m / min

[0083] Total post-stretch ratio: 7.6 times

[0084] Hot plate temperature: 56°C

[0085] Hot plate temperature I: 104°C

[0086] Hot plate temperature II: 112°C

[0087] Hollowness: 16.8%

[0088] Porosity: 97.5%

[0089] T...

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Abstract

The present invention discloses a porous polypropylene modified fibre for explosion-proof concrete. It is characterized by that said fibre is made up by using polypropylene chip whose melting index is 16-60 as main body raw material, adding 0.1-1% of distearic amide surfactant and 0.1-6% of inorganic ceramic micro-powder and making all the above-mentioned materials undergo the processes of mixing, granulating, high-pressure spinning and multistage drawing.

Description

technical field [0001] The invention relates to a modified fiber for concrete, in particular to a porous polypropylene modified fiber for explosion-proof concrete. Background technique [0002] The role of fiber in concrete is mainly to prevent cracks caused by the plastic shrinkage of cement during curing. In the prior art, the added fibers mainly include metal steel fibers, inorganic asbestos fibers, glass fibers and various synthetic fibers. [0003] British patent (1130612) proposes to replace traditional reinforcing fibers with membrane-split polypropylene fibers to improve the crack resistance, anti-seepage, impact resistance, and bending resistance of concrete. It is not easy to disperse during cement mixing, and it is easy to cause local agglomeration, which will affect the improvement of the mechanical properties of fiber reinforced concrete. [0004] The technologies disclosed in Chinese patents CN 1273951A and CN 1322865A are to use fibers with trilobal or star-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/06C04B16/06
CPCC04B16/0633C04B28/02D01F6/06D01D5/247
Inventor 王依民倪建华何唯平汤惠工
Owner SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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