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Filter, filter laminate, and fiber product comprising filter or filter laminate

A technology of filters and laminates, which is applied in the field of fiber products, can solve problems such as easy disconnection, poor molding, and reduced capture performance, and achieve the effect of small mesh size, high quality, and excellent capture performance

Inactive Publication Date: 2015-11-04
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this manufacturing condition is used, the fiber may not be able to withstand the spinning tension and may be easily broken, and liquid droplets may fall on the net to cause molding defects called pellets.
[0006] In addition, when the fiber density is gradually increased in order to improve the capture performance of the filter, the problem of poor air permeability occurs. In order to obtain a filter with good air permeability (low pressure loss), it is preferable that the fineness of the fiber sheet to be formed is relatively large. On the other hand, since the voids between fibers within the sheet become wider, the capture performance decreases
Like this, it is difficult to balance capture and breathability

Method used

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  • Filter, filter laminate, and fiber product comprising filter or filter laminate
  • Filter, filter laminate, and fiber product comprising filter or filter laminate

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0127] Production Example 1 [Manufacture of Polypropylene (A)]

[0128] With a mixer and an internal volume of 68m 3 In the stainless steel reactor, with 5.2m 3 / h continuous supply of n-heptane, continuous supply of triisobutylaluminum at 0.6mol / h, and continuous supply of 0.7mmol / h in terms of zirconium to make dimethylaniline tetrakis (pentafluorophenyl) borate and (1 ,2'-dimethylsilylene)(2,1'-dimethylsilylene)bis(3-trimethylsilylmethylindenyl)zirconium dichloride with triisobutyl A catalyst component obtained by contacting aluminum and propylene in advance.

[0129] At a polymerization temperature of 85° C., propylene and hydrogen were continuously supplied so that the hydrogen concentration in the gas phase was kept at 5.0 mol % and the total pressure in the reactor was kept at 1.7 MPa·G.

[0130] Irganox 1010 (trade name, manufactured by BASF Corporation) was added to the obtained polymerization solution so that the content in the polymerization solution became 1000 ...

Embodiment 1

[0168] (Preparation of polypropylene-based resin composition)

[0169] The polypropylene (A) obtained in Production Example 1 was 5% by mass and the polypropylene (B) (Achieve (registered trademark) 6936G1 resin, manufactured by ExxsonMobil Corporation) with an MFR of 1550 g / 10min was 95% by mass. and mixed to obtain a polypropylene-based resin composition.

[0170] (Melt flow rate measurement)

[0171] About the said polypropylene resin composition, it measured on conditions of temperature 230 degreeC and load 21.18N according to JISK7210.

[0172] (DSC measurement)

[0173] Using a differential scanning calorimeter (manufactured by Parkin Elmer Co., Ltd., DSC-7), 10 mg of a sample was kept at -10°C for 5 minutes in a nitrogen atmosphere, and then the temperature was raised at 10°C / min, and the resulting melting endotherm was obtained. Calculate the melting endothermic heat ΔH from the curve.

[0174] (manufacturing of filters)

[0175] The above-mentioned polypropylene-...

Embodiment 2

[0181]In Example 1, using a polypropylene-based resin composition containing 10% by mass of polypropylene (A) and 90% by mass of polypropylene (B), the average discharge amount per hole from the die was set to 0.068 g / min , except that, the same operation as in Example 1 was carried out to manufacture a melt-blown filter. Table 1 shows the measurement results of the capture efficiency and pressure loss of this filter.

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Abstract

A filter which has a good balance between trapping properties and air permeability is provided by a filter that is formed of a polypropylene resin composition satisfying the following conditions (1)-(3). (1) The melt flow rate is 10-2,000 g / 10 minutes. (2) The melting endotherm (∆H) as measured by a differential scanning calorimeter is 50-95 J / g. (3) A polypropylene (A) having a [mmmm] of 20-60% by mole is contained.

Description

technical field [0001] The present invention relates to filters, filter laminates, and fibrous products comprising them. Background technique [0002] In recent years, with the increase of automobiles and the deterioration of environmental pollution, air-purifying filters used mainly for the purpose of filtering the air circulating in the room and purifying the indoor air in the fields of clean rooms and building air conditioners are used in automobiles. It is widely used as an air filter, a cabin filter, etc. in cars and general households. [0003] In addition, household sanitary masks, dental masks, and surgical masks that are widely used use polypropylene meltblown nonwoven fabric as a filter material, and spunbond nonwoven fabric as a protective layer on the atmospheric side. The mouth side uses the same spunbonded nonwoven fabric or various dry or wet nonwoven fabrics (thermal bonded nonwovens, spunlace nonwovens), etc. [0004] These air purification filters and mas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B03C3/28C08F10/06C08L23/12D04H3/16
CPCB01D39/16B03C3/30C08L23/12D04H3/007D04H3/16C08L2205/025C08L2203/12C08F110/06C08F4/65927A41D13/11A62B18/02A62B23/025B01D39/1623
Inventor 武部智明南裕郡洋平
Owner IDEMITSU KOSAN CO LTD