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Modified polypropylene fiber, preparation method thereof, and modified polypropylene fiber reinforced mortar concrete

A polypropylene fiber and polypropylene technology is applied in the field of modified polypropylene fiber reinforced mortar concrete, which can solve the problems of poor dispersion uniformity and low mechanical properties of fiber fibers.

Inactive Publication Date: 2017-08-29
ZHONGSHAN KECHENG CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fibers prepared by the above method have disadvantages such as low fiber mechanical properties or poor dispersion uniformity.

Method used

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  • Modified polypropylene fiber, preparation method thereof, and modified polypropylene fiber reinforced mortar concrete
  • Modified polypropylene fiber, preparation method thereof, and modified polypropylene fiber reinforced mortar concrete
  • Modified polypropylene fiber, preparation method thereof, and modified polypropylene fiber reinforced mortar concrete

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preparation example Construction

[0042] The preparation method of the modified polypropylene fiber provided by the present invention is convenient to operate, the method is simple, and the process is mature. In the production of the existing polypropylene fiber, only the composite interface modifier of the present invention is added to form a modified polypropylene fiber that is compatible with mortar concrete. The modified polypropylene fiber with strong interfacial bonding has no adverse effect on the production process, and does not need to add special production equipment, so the cost is low.

[0043] The present invention also provides a modified polypropylene fiber reinforced mortar concrete, comprising mortar concrete and modified polypropylene fibers distributed in the mortar concrete, the modified polypropylene fiber is the modified polypropylene fiber described in the above technical solution Propylene fiber or modified polypropylene fiber prepared according to the preparation method described in the...

Embodiment 1

[0049] 90 parts by weight of polypropylene chips, 5 parts by weight of composite interface modifier (SiO 2 85%, Al 2 o 3 10%, CaO5%), 5 parts by weight of polypropylene grafted maleic anhydride with a graft rate of 1% are mixed evenly and then mixed and extruded into granules by a twin-screw extruder. The extrusion temperature is 180 ° C, and the improved Non-toxic polypropylene masterbatch;

[0050] The obtained modified polypropylene masterbatch is melt-spun, the screw temperature is controlled at 200-245°C, the metering pump specification is 0.6ml / r, the metering pump rotation speed is 20r / min, the spinneret hole diameter is 0.4mm, the number of holes is 18, and the volume is The winding speed was 200m / min, and the tow was subjected to 4 times thermal drawing after winding to obtain a modified polypropylene fiber with a composite interface modifier content of 5% and a diameter of 36.9 μm, labeled PP-1.

Embodiment 2

[0052] 85 parts by weight of polypropylene chips, 10 parts by weight of composite interface modifier (SiO 2 98%, Al 2 o 3 1%, CaO1%), 5 parts by weight of polypropylene grafted maleic anhydride with a graft rate of 5% are mixed uniformly and then mixed and extruded to pelletize by a twin-screw extruder. The extrusion temperature is 180 ° C, and the improved Non-toxic polypropylene masterbatch;

[0053] The obtained modified polypropylene masterbatch is melt-spun, the screw temperature is controlled at 200-245°C, the metering pump specification is 0.6ml / r, the metering pump rotation speed is 20r / min, the spinneret hole diameter is 0.4mm, the number of holes is 18, and the volume is The winding speed was 200m / min, and the tow was subjected to 4 times thermal drawing after winding to obtain a modified polypropylene fiber with a composite interface modifier content of 10% and a diameter of 36.6 μm, labeled PP-2.

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Abstract

The invention provides a modified polypropylene fiber, a preparation method thereof, and modified polypropylene fiber reinforced mortar concrete. The modified polypropylene fiber is prepared from, by mass, 70 to 95 parts of polypropylene, 5 to 25 parts of a composite interface modifier, and 1 to 5 parts of polypropylene grafted maleic anhydride; and the composite interface modifier comprises SiO2, Al2O3, and CaO. According to the preparation method, polypropylene is taken as a raw material, polypropylene grafted maleic anhydride and the composite interface modifier SiO2, Al2O3, and CaO are added, so that the obtained modified polypropylene fiber is provided with excellent hydrophilic performance, dispersion performance in mortar concrete is excellent, the interface performance of fiber with cement matrix is improved, and the rupture strength and the compressive strength of mortar concrete are improved by fiber.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a modified polypropylene fiber, a preparation method thereof, and a modified polypropylene fiber reinforced mortar concrete. Background technique [0002] Polypropylene fiber, commonly known as polypropylene fiber, is a fiber made by melt spinning polypropylene. It officially started industrial production in 1957 and is a rising star in synthetic fibers. Due to the simple production process of polypropylene fiber, the relative density is small (0.91g / cm 3 ), low raw material and production costs, high fiber strength, and is widely used in industrial fabrics such as fishing nets, canvas, water hoses, and building reinforcements. Polypropylene fiber used in concrete and mortar can effectively improve the crack resistance of mortar concrete, greatly improve the impermeability of concrete, significantly improve the impact resistance and wear resistance of concrete, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10C04B28/02C04B16/06D01D1/04D01D5/08
CPCC04B16/0633C04B28/02C04B2201/50D01D1/04D01D5/08D01F1/10D01F6/46C04B14/06C04B18/146C04B18/141C04B2103/302
Inventor 刘鹏清傅峰牟浩傅思迪刘泽彬姜猛进徐建军叶光斗
Owner ZHONGSHAN KECHENG CHEM FIBER