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Polypropylene non-woven fabric and making method thereof

A polypropylene non-woven fabric, polypropylene technology, applied in non-woven fabrics, textiles and papermaking, etc., can solve problems such as low strength, achieve uniform fineness, reduce the possibility of surface defects on the thread, and achieve stable quality. Effect

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of high intensity polypropylene nonwoven fabric and a kind of preparation method of polypropylene nonwoven fabric in order to overcome the defect of low strength of existing polypropylene nonwoven fabric

Method used

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  • Polypropylene non-woven fabric and making method thereof
  • Polypropylene non-woven fabric and making method thereof
  • Polypropylene non-woven fabric and making method thereof

Examples

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preparation example Construction

[0028] The preparation method of the polypropylene non-woven fabric provided by the present invention comprises melting and mixing polypropylene and additives, extruding, air-stretching, cooling and solidifying, laying and reinforcing, and the molecular weight distribution index of the polypropylene is 2.5-5.5, Preferably 3.0-4.9; polymer tailing index PI in molecular weight distribution width HT Greater than 1.9, preferably greater than 2.1.

[0029] According to the present invention, the polypropylene can be prepared according to various methods known to those skilled in the art, for example, the polypropylene is prepared by a method comprising the following steps:

[0030] (1) In the presence of Ziegler-Natta catalyst (Ziegler-Natta) catalyst, pre-polymerize propylene at -10°C to 50°C and 0.1-100MPa to obtain a pre-polymerization ratio of 2-3000g polymer / gram catalyst, preferably 3-2000 gram polymer / gram catalyst, more preferably propylene prepolymer of 50-300 gram polym...

Embodiment 1

[0111] This example is used to illustrate the polypropylene nonwoven fabric provided by the present invention and its preparation method.

[0112] (1) Preparation of polypropylene:

[0113] A. Preparation of titanium-containing solid catalyst component: After fully replacing the 16L pressure-resistant reactor with a stirrer with nitrogen, then add 10L ethanol, 300mL of 2-ethylhexanol, 11.2g iodine, 8g Magnesium chloride and 640g of magnesium powder were stirred and mixed evenly, and the system was heated to 75°C for reflux reaction while stirring, and the reaction was stopped until no hydrogen gas was discharged. The obtained reaction product was washed with 3L of ethanol, filtered, and dried to obtain dialkoxymagnesium with an average particle diameter D50 of 30.2 μm, a particle size distribution index SPAN of 0.81, and m of 0.015. Take 650g of the above dialkoxymagnesium, 3250mL of toluene, and 65mL of 2-isopropyl-2-isopentyl-1,3-dimethoxypropane to prepare a suspension. A...

Embodiment 2

[0123] This example is used to illustrate the polypropylene nonwoven fabric provided by the present invention and its preparation method.

[0124] (1) Preparation of polypropylene:

[0125] A, preparation of titanium-containing solid catalyst component: (same as Example 1);

[0126] B, test device: (same as embodiment 1);

[0127] C. Test conditions:

[0128] Step (1) pre-polymerization: the reaction pressure is 2.5MPa, the reaction temperature is 10°C, and the reaction time is 12 minutes; the feeding amount of titanium-containing solid catalyst component and triethylaluminum is 0.4g / hour and 0.058mol / hour respectively Hour, the propylene feed rate is 10 kilograms / hour, obtains the propylene prepolymer that prepolymerization multiple is 100 gram polymer / gram catalyst;

[0129] Step (2) Gas-phase polymerization: The reaction temperature is 91°C, the reaction pressure is 2.3 MPa, and the reaction time is 60 minutes. The propylene prepolymer obtained in step (1) is continuousl...

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Abstract

The invention provides a polypropylene non-woven fabric and a making method of the polypropylene non-woven fabric. The molecular weight distribution index of polypropylene in the polypropylene non-woven fabric is 2.5-5.5, and the high molecular trailing index PIHT in molecular weight distribution width is greater than 1.9. The polypropylene non-woven fabric has high strength.

Description

technical field [0001] The invention relates to a polypropylene nonwoven fabric and a preparation method of the polypropylene nonwoven fabric. Background technique [0002] Polypropylene non-woven fabric has the advantages of good high temperature resistance, aging resistance, UV resistance, high elongation, high stability, good air permeability, corrosion resistance, and good sound insulation effect. Therefore, it is widely used in clothing linings and winter clothing to keep warm Materials (ski jackets, quilts, inner cores for sleeping bags, etc.), overalls, surgical gowns, protective clothing, suede materials. [0003] There are many processes for producing polypropylene non-woven fabrics. For example, polypropylene non-woven fabrics can be prepared by the spunbond non-woven fabric production process. The specific process is as follows: mix polypropylene and additives evenly in a mixer, and feed the resulting mixture into the feeder in the extruder (such as a twin-screw ...

Claims

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Application Information

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IPC IPC(8): D04H3/007C08F110/06C08F4/649C08F4/646
Inventor 徐萌张师军李杰于鲁强郭梅芳王良诗邹浩徐凯吕芸
Owner CHINA PETROLEUM & CHEM CORP
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