Raw material of non-woven fabric and its preparation method 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 that non-woven fabrics cannot have softness, strength and spinnability at the same time, and achieve flexible use, safety and hygiene. Excellent, avoid wire breakage effect

Active Publication Date: 2019-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects that the softness, strength and spinnability of nonwoven fabrics in the prior art cannot be combined, thereby providing a kind of nonwoven fabric raw material and its preparation method, and using the nonwoven fabric raw material to prepare nonwoven fabrics. method of spinning

Method used

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  • Raw material of non-woven fabric and its preparation method and preparation method of non-woven fabric
  • Raw material of non-woven fabric and its preparation method and preparation method of non-woven fabric
  • Raw material of non-woven fabric and its preparation method and preparation method of non-woven fabric

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Experimental program
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Effect test

Embodiment approach

[0029] According to a preferred embodiment of the present invention, the polymer composition is prepared by continuous polymerization in the presence of a Ziegler-Natta catalyst with high stereoselectivity, which can reduce the production cost of non-woven fabrics and improve the efficiency of polymerization. At the same time as required by the device, the ethylene-propylene elastic copolymer B is more uniformly dispersed in the polymer composition.

[0030] The continuous polymerization method means that the preparation process includes at least two sequential steps, wherein component (a) (i.e. crystalline polypropylene A) and component (b) (i.e. ethylene-propylene elastic copolymer B) are each in It is prepared in a separate step and, in addition to the first step, the latter step is carried out in the presence of the polymer formed in the previous step and the catalyst used in the previous step.

[0031]In the present invention, the α-olefin with 4-10 carbon atoms can be va...

Embodiment 1

[0096] This example is used to illustrate the non-woven fabric raw material of the present invention, its preparation method and the preparation method of the non-woven fabric.

[0097] (1) Preparation of non-woven raw materials

[0098] The polymerization reaction is carried out on the above-mentioned horizontal gas-phase polypropylene pilot plant, and the reaction is carried out according to the above-mentioned method. The external electron donor used in the polymerization reaction is diisobutyldimethoxysilane, the first reactor is used to prepare component (a) by homopolymerization of propylene, the polymerization temperature is 66°C, the reaction pressure is 2.3MPa, and the residence time is 90 minutes . The melt index obtained by the reaction of component (a) was 43.2 g / 10 min.

[0099]The second reactor is used for propylene copolymerization to prepare component (b). Ethylene and propylene are added into the reactor. The polymerization temperature is 66° C., the reacti...

Embodiment 2

[0105] This example is used to illustrate the non-woven fabric raw material of the present invention, its preparation method and the preparation method of the non-woven fabric.

[0106] (1) Preparation of non-woven raw materials

[0107] Adopt the method identical with embodiment 1 to prepare non-woven raw material.

[0108] (2) Preparation of non-woven fabric

[0109] 90% by weight of the polymer composition and 10% by weight of propylene homopolymer (brand H30S, Sinopec Zhenhai Refining & Chemical, melt index 37.8g / 10min) were mixed and fed into a single-screw extruder, and the rest of the steps were the same as in Example 1 . Obtain non-woven fabric FB2, its properties are shown in Table 1.

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Abstract

The invention discloses a non-woven fabric raw material, a preparation method of the non-woven fabric raw material and a preparation method of a non-woven fabric. The non-woven fabric raw material comprises 60-100wt% of a polymer composition and 0-40wt% of a first propylene homopolymer. The polymer composition contains 70-95wt% of crystalline polypropylene A and 5-30wt% of an ethylene-propylene elastic copolymer B. At a temperature of 230 DEG C, under load of 2.16kg, a ratio of a melt index of the polymer composition to a melt index of the crystalline polypropylene A is in a range of 0.7-1.3. The non-woven fabric raw material has spinnability and can be used for preparing the non-woven with high flexibility and high strength.

Description

technical field [0001] The invention relates to a non-woven fabric raw material and a preparation method thereof, and 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 resistance, breathability, light weight, good hand feeling, non-toxic, acid and alkali resistance, low price and recyclability, and have been widely used in sanitary materials (such as diapers), medical supplies, Packaging, building materials and pesticides and other fields. Non-woven fabrics used in medical supplies and hygienic materials have high requirements for comfort and softness in addition to general performance requirements. [0003] At present, the general raw material for polypropylene fiber is generally propylene homopolymer, which has high crystallinity, so that the strength of fabrics and non-woven fabrics is high, but the softness is p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/16C08F210/16C08F110/06C08K5/134C08K5/526C08K5/098D04H3/14D04H3/16D04H3/007
CPCY02P20/52
Inventor 徐萌张师军杨芝超李杰初立秋吕芸白弈青徐毅辉
Owner CHINA PETROLEUM & CHEM CORP
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