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Synthetic fibre for reinforced concrete with rust prevention function and method for preparing same

A synthetic fiber and concrete technology, applied in the field of synthetic fiber preparation, to achieve the effect of preventing corrosion, prolonging service life, saving material cost and maintenance cost

Active Publication Date: 2010-01-06
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report about blending gas-phase corrosion inhibitors into polymers and coating the surface to prepare synthetic fibers that can be used in concrete with anti-corrosion functions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Stir 1.9kg of polypropylene S700 (produced by Yangzi Petrochemical), 50g each of sodium nitrite and sodium benzoate in a high-speed mixer for 2.0min at a speed of 1000-4000r / min. temperature,

[0023] Feeding port

[0024] The masterbatch containing the solid vapor phase corrosion inhibitor is prepared by pelletizing after extrusion. Dry the polypropylene masterbatch containing the corrosion inhibitor in a dryer for 10-12 hours at a temperature of 85±5°C. After mixing the dried PP masterbatch and the dried new material at a mass ratio of 1:1, put them into the storage barrel of the spinning machine, and prepare the as-spun silk according to the conventional PP short fiber spinning process.

[0025] The specific process of spinning is as follows: After the material is added to the hopper, after setting the temperature and screw speed of each zone of the extruder, the spinning melt enters the spinning assembly after passing through the feeding section, plastici...

Embodiment 2

[0030] Mix 1.9kg of polyamide 66 (nylon 66) FYR26H (manufactured by China Shenma Group Co., Ltd.), 50g each of sodium nitrite and calcium nitrite in a high-speed mixer for 3.0min, after mixing evenly, extrude on a screw extruder out of granulation. Set the temperature of each zone of the screw:

[0031] Feeding port

[0032] Dry the nylon 66 masterbatch containing the corrosion inhibitor in a desiccator for 10 to 12 hours at a temperature of 105±5°C. After mixing the dried nylon 66 masterbatch and the dried new material at a mass ratio of 2:1, put them into the storage barrel of the spinning machine, and prepare the as-spun silk according to the conventional nylon 66 staple fiber spinning process.

[0033] The temperature and speed of each zone of the extruder during spinning:

[0034] Feeding port

[0035] Add 1 kg each of benzotriazole and diethanolamine acetate to 8 kg of nylon 66 fiber post-spinning oil THL-PA-4018 (Changzhou Lingda Chemical Co., Ltd....

Embodiment 3

[0037] 1.96 kg of polypropylene S700 (produced by Yangzi Petrochemical), 20 g each of calcium nitrite and sodium benzoate were stirred in a high-speed mixer for 2.0 min, and after mixing evenly, extruded on a screw extruder to granulate.

[0038] Set the temperature of each zone of the screw:

[0039] Feeding port

[0040]Dry the polypropylene masterbatch containing the corrosion inhibitor in a dryer for 10-12 hours at a temperature of 85±5°C. After mixing the dried PP masterbatch and the dried new material at a mass ratio of 1:1, put them into the storage barrel of the spinning machine, and prepare the as-spun silk according to the conventional PP short fiber spinning process.

[0041] The temperature and speed of each zone of the extruder during spinning:

[0042] Feeding port

[0043] Add 1 kg each of diethanolamine acetate and 2-mercaptobenzothiazole into 8 kg of PP fiber post-spinning oil agent 2038 (Changzhou Lingda Chemical Co., Ltd.) for emulsifica...

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PUM

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Abstract

The invention relates to rustproof concrete used synthetic fiber, which is prepared with the following components: 1.0 percent to 20 percent of a vapour-phase inhibitor and 80.0 and 99.0 percent of a polymer. The preparation method of the rustproof concrete used synthetic fiber comprises the steps that : 1) the solid vapour-phase inhibitor mixture is mixed uniformly and is mixed together with the polymer before the mixture is granulated, thus getting polymer master batches; 2) the polymer master batches are mixed with a fresh polymer without solid vapour-phase inhibitor, and fiber precursor is spun out; 3) the liquid vapour-phase inhibitor is beaten and mixed in a spinning finish before the mixture is emulsified into stable back spinning oil solutions which are applied on fiber; 4) the fiber applied with the oil solutions is drawn, thermoformed and cut off before the fiber is packed. The inhibitor contained in the rustproof concrete used synthetic fiber can be released slowly during the use of concrete, and protects steel bars well after the released inhibitor arrives at the surface of the steel bars through the capillary bores in the concrete. When the fiber is stretched or broken under stress, the inhibitor can be released quickly; in this way, the fiber is rustproof when the inhibitor inhibits the concrete from cracking.

Description

technical field [0001] The invention relates to a preparation method of modified synthetic fibers for concrete, in particular to a preparation method of synthetic fibers with antirust function. Background technique [0002] Synthetic fibers have been widely used in concrete. Its main function is to prevent early plastic cracking of concrete and improve the compactness and penetration resistance of concrete. The synthetic fibers currently used mainly include polyethylene fiber (ethylene fiber), polypropylene fiber (polypropylene fiber), polyester fiber (polyester fiber) and polyamide fiber (nylon). [0003] Vapor phase inhibitor (Vapor phase inhibitor, referred to as VPI), also known as volatile corrosion inhibitor (volatile corrosion inhibitor, referred to as VCI), is a kind of gas that can automatically volatilize at room temperature and adsorb on the surface of the metal to prevent metal corrosion. anti-corrosion chemicals. Vapor-phase corrosion inhibitors are generally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B16/06
Inventor 缪昌文刘加平刘志勇阳知乾
Owner JIANGSU SOBUTE NEW MATERIALS
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