Non-woven fabric raw material and preparation method thereof, and preparation method of non-woven fabric

A technology for non-woven fabrics and raw materials, applied in the field of non-woven fabric raw materials and their preparation, can solve the problems of insufficient softness, difficult processing, and uneven dispersion, and achieve excellent safety and hygiene, high softness and strength. , the effect of reducing costs

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the method of blending homopolypropylene and propylene-based elastomer is adopted, although the shape of the elastomer can be controlled, first, the cost will increase, and second, if the content of the elastomer is high, the blending and spinning process will It is easy to disperse unevenly, and it will also cause blockage and broken wires
[0008] Co-spinning copolymer or polyethylene and propylene homopolymer into "skin-core" structural fibers and using them as a "skin" layer can also improve the feel of fibers and non-woven fabrics, but this structure requires special equipment and spinning Board implementation requires high equipment requirements and is difficult to process. Since the core is usually made of propylene homopolymer, although the surface feel has been improved to a certain extent, its softness is still insufficient.

Method used

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  • Non-woven fabric raw material and preparation method thereof, and preparation method of non-woven fabric
  • Non-woven fabric raw material and preparation method thereof, and preparation method of non-woven fabric

Examples

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preparation example Construction

[0079] According to the preparation method of the present invention, the first olefin polymerization conditions may include: a temperature of 50-100°C, preferably 60-95°C; a pressure of 1-8 MPa, preferably 1.2-5.5 MPa; and a time of 30-180 minutes , Preferably 45-120 minutes. In the present invention, pressure refers to the gauge pressure of the reactor.

[0080] The reactor for the gas phase polymerization of olefins can be a horizontal stirred bed reactor, a vertical stirred bed reactor, a fluidized bed reactor, etc., and the above gas phase reactors can be arbitrarily combined.

[0081] According to the preparation method of the present invention, the olefin gas phase polymerization conditions may include: a temperature of 50-100°C, preferably 60-95°C; a pressure of 1-4 MPa, preferably 1.2-3.5 MPa; and a time of 10-180 minutes, Preferably it is 10-90 minutes.

[0082] According to the present invention, the method may include mixing the polypropylene composition, nucleating agen...

Embodiment 1

[0112] This embodiment is used to illustrate the non-woven fabric raw material and the preparation method thereof and the preparation method of the non-woven fabric of the present invention.

[0113] (1) Preparation of non-woven fabric raw materials

[0114] The polymerization reaction was carried out on the above-mentioned horizontal gas phase polypropylene pilot plant, the catalyst particle size used was 59 microns, and the reaction was carried out according to the above-mentioned method. The external electron donor used is diisopropyldimethoxysilane, the polymerization reaction in the first reactor is propylene homopolymerization, the polymerization temperature is 66° C., the reaction pressure is 2.3 MPa, and the residence time is about 90 minutes. The melt index of the component (a) obtained by the reaction is 42.6 g / 10 min.

[0115] The second reactor is propylene copolymerization to prepare component (b). Ethylene and propylene are added to the reactor. The polymerization temp...

Embodiment 2

[0120] This embodiment is used to illustrate the non-woven fabric raw material and the preparation method thereof and the preparation method of the non-woven fabric of the present invention.

[0121] (1) Preparation of non-woven fabric raw materials

[0122] The non-woven fabric material was prepared by the same method as in Example 1, except that 800 ppm of nucleating agent NX8000 was used instead of 500 ppm of nucleating agent Millad 3988 in Example 1.

[0123] (2) Preparation of non-woven fabric

[0124] A non-woven fabric was prepared by the same method as in Example 1 to obtain a non-woven fabric FB2, the properties of which are shown in Table 1.

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Abstract

The invention discloses a non-woven fabric raw material and a preparation method thereof, and a preparation method of a non-woven fabric; the non-woven fabric raw material contains a polypropylene composition and a nucleating agent; the polypropylene composition contains 40-70 wt.% of crystalline polypropylene A and 30-60 wt.% of an ethylene-propylene elastic copolymer B, wherein at the temperature of 230 DEG C and the pressure of 2.16 kg, the ratio of the melt index of the polypropylene composition to the melt index of the crystalline polypropylene A is 0.7-1.3; with the total weight of the polypropylene composition as a benchmark, the content of the nucleating agent is 200-2000 ppm. The non-woven fabric raw material has good spinnability, and the prepared non-woven fabric has the advantages of comfortable sense of touch, softness, good mechanical performance, high strength and high flexibility.

Description

Technical field [0001] The invention relates to a non-woven fabric raw material and a preparation method thereof. The invention also relates to a method for preparing a non-woven fabric using the non-woven fabric raw material. Background technique [0002] Polypropylene fiber fabrics and non-woven fabrics have the advantages of moisture-proof, breathable, light weight, good feel, non-toxic, acid and alkali resistance, low price and recyclability. They have been widely used in sanitary materials (such as diapers), medical supplies, Packaging, building materials and pesticides. In addition to general performance requirements, non-woven fabrics used in medical supplies and sanitary materials also have higher requirements for comfort and softness. [0003] At present, the commonly used raw materials for polypropylene fibers are generally propylene homopolymers, which have high crystallinity, so that fabrics and non-woven fabrics have higher strength. However, the softness is poor and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/16C08F4/02C08F4/654C08F4/651C08F4/646C08F110/06C08F210/16C08F2/34D04H3/14D04H3/16D04H3/007
CPCY02P20/52
Inventor 徐萌李杰初立秋张师军邹浩徐毅辉张丽英杨芝超
Owner CHINA PETROLEUM & CHEM CORP
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