Structure enhanced synthetic fiber for concrete and preparation thereof

A technology of structural reinforcement and synthetic fiber, which is applied in fiber cutting, fiber treatment, spinning solution preparation, etc., can solve the problems of brittleness and weak tensile performance, and achieve the improvement of crush resistance, suppression of connecting cracks, and clear outline Effect

Inactive Publication Date: 2009-01-21
南京派尼尔科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problems existing in the use of existing fibers, the present invention proposes a new structure-reinforced synthetic fiber for concrete, which not only has the common advantages of steel fibers and polypropylene fibers, but also overcomes their shortcomings, and can meet The actual requirements of different projects can overcome the shortcomings of ordinary concrete such as brittleness and weak tensile properties

Method used

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  • Structure enhanced synthetic fiber for concrete and preparation thereof
  • Structure enhanced synthetic fiber for concrete and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1) Melt and mix each raw material at 150-320°C according to the following weight ratio:

[0052] 69.8% polypropylene, 25% polyethylene, 5% polyamide, 0.05% nucleating agent, 0.15% antioxidant;

[0053] 2) sending the molten mixture into a twin-screw extruder for extrusion molding;

[0054] The first zone of the machine head is 150°C, the second zone is 180°C, the third zone is 240°C, and the fourth zone is 320°C;

[0055] 3) Direct injection into the spinneret to extrude the spinneret;

[0056] 4) Water cooling to 20-40°C;

[0057] 5) One traction stretch

[0058] 6) superdispersant oil bath, the weight concentration of soaking dispersant is 1.0%;

[0059] 7) 135 ~ 140 ℃ hot air drying for 2 minutes;

[0060] 8) Secondary traction and stretching to 60-70CN / TEX;

[0061] 9) The wire splitter is bent and wound;

[0062] 10) According to the customer's requirements, the outer dimension is cut into the required length and packed into the warehouse.

Embodiment 2

[0064] The preparation process of embodiment 2 is identical with embodiment, and the weight ratio of each component is as follows:

[0065] 49% polypropylene, 50% polyethylene, 0 polyamide, 0.5% nucleating agent, 0.5% antioxidant.

[0066] Step 6) The weight concentration of the sizing and dispersing agent is 0.5%.

Embodiment 3

[0068] The preparation process of embodiment 3 is identical with embodiment, and the weight ratio of each component is as follows:

[0069] 20% polypropylene, 74.4% polyethylene, 5% polyamide, 0.5% nucleating agent, 0.1% antioxidant.

[0070] Step 6) The weight concentration of the sizing and dispersing agent is 0.5%.

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Abstract

The invention relates to a structurally reinforced synthetic fiber for concrete. The synthetic fiber is prepared by processes of fusion, spinning, dispersion and fixing, and the synthetic fiber comprises the following components: 20 to 70 percent of polypropylene, 25 to 75 percent of polyethylene, 0 to 25 percent of polyamide, 0.05 to 0.5 percent of nucleating agent and 0.1 to 0.5 percent of antioxidant. The synthetic fiber of the invention has rough surface and clear contour, and has good dispersibility and cement basal body with excellent cementing property; the product has not only the functions of steel fibers, but also advantages of synthetic fibers, so that the synthetic fibers of the invention is mainly used to replace weld metal screens and steel fibers in the concrete panel structure for improving the bending resistant, shock resistant and fatigue resistant performance of concrete.

Description

【Background technique】 [0001] Fiber concrete is a composite material composed of concrete as the matrix and metal fibers, inorganic non-metallic fibers, synthetic fibers or natural organic fibers as reinforcing materials. In fiber reinforced concrete, the fibers distributed randomly in three dimensions form a network supporting effect, which can inhibit the cracking process of concrete, improve the fracture toughness of concrete, and improve the performance of concrete. [0002] Polypropylene fiber and steel fiber are the most commonly used fiber varieties in engineering. In the actual promotion process, they have some problems to varying degrees. Polypropylene fibers are generally used as non-structural reinforcing materials for crack-proof and anti-seepage projects of concrete. The strengthening and toughening effects are not obvious, so they cannot be used in occasions that require structural reinforcement; although steel fibers can significantly improve the resistance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B16/06D01D1/02D01D5/08D01D5/12D01G1/00
CPCC04B32/02C04B20/0068
Inventor 叶德平朱瑾
Owner 南京派尼尔科技实业有限公司
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