Support for separation membrane, and method for production thereof

A manufacturing method and separation membrane technology, which are applied in chemical instruments and methods, semi-permeable membrane separation, textiles and papermaking, etc., can solve the problems of defects, uneven membranes, and high manufacturing costs, and achieve suppression of deformation, excellent uniformity, The effect of high water production

Active Publication Date: 2010-06-30
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the semipermeable membrane support proposed in this proposal is expensive to manufacture, and since it is made of a nonwoven fabric composed of short fibers, there is a problem that the membrane becomes uneven and has defects due to fuzzing.

Method used

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  • Support for separation membrane, and method for production thereof
  • Support for separation membrane, and method for production thereof
  • Support for separation membrane, and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0186] Prepare polyethylene terephthalate resin (a) and copolyester resin (b), described polyethylene terephthalate resin (a) is dried to moisture content below 50ppm, and its intrinsic viscosity The IV is 0.65, the melting point is 260°C, and contains 0.3% by weight of titanium oxide, the copolyester resin (b) is dried to a moisture content of 50 ppm or less, the intrinsic viscosity IV is 0.66, and the copolymerization ratio of isophthalic acid is 10 mol%, melting point is 230°C, and contains 0.2% by weight of titanium oxide.

[0187] The above-mentioned polyethylene terephthalate resin (a) was melted at a temperature of 295°C, and the copolyester resin (b) was separately melted at a temperature of 280°C to form polyethylene terephthalate Alcohol ester resin (a) is the core component, and copolyester resin (b) is the sheath component, and the core: sheath = 80:20 weight ratio is spun from the pores at a nozzle temperature of 300 ° C, and then passed through An ejector (Eject...

Embodiment 2

[0189]The polyethylene terephthalate resin (a) used in Example 1 was melted at a temperature of 295° C., and the copolyester resin (b) was separately melted at a temperature of 280° C. The ethylene glycol phthalate resin (a) is the core component, and the copolyester resin (b) is the sheath component, and the nozzle temperature is 300° C., and the core: sheath = 80:20 by weight ratio. The fine holes are spun out, and then spun by an injector at a spinning speed of 4500m / min to form concentric core-sheath long fibers with a circular cross-section, which are collected as a fiber web on a moving mesh conveyor belt. The collected fiber web is clamped between a pair of upper and lower stainless steel flat rolls, and thermocompression bonding is carried out at the surface temperature of each flat roll at 190°C and a linear pressure of 60kg / cm to produce continuous long fiber fibers The diameter is 10μm, and the weight per unit area is 80g / m 2 , a spunbonded nonwoven fabric with a t...

Embodiment 3

[0191] The polyethylene terephthalate resin (a) used in Example 1 was melted at a temperature of 295° C., and the copolyester resin (b) was separately melted at a temperature of 280° C. Ethylene phthalate resin (a) is the core component, and copolyester resin (b) is the sheath component, and the temperature of the nozzle is 300 ° C, and the core: sheath = 85:15 under the condition of the weight ratio. The fine holes are spun out, and then spun by an injector at a spinning speed of 4300m / min to form concentric core-sheath long fibers with a circular cross-section, which are collected as a fiber web on a moving mesh conveyor belt. The collected fiber web is clamped between a pair of upper and lower stainless steel flat rolls, and thermocompression bonding is carried out at the surface temperature of each flat roll at 190°C and a linear pressure of 60kg / cm to produce continuous long fiber fibers The diameter is 11μm, and the weight per unit area is 50g / m 2 , a spunbond nonwoven ...

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Abstract

Disclosed is a support for a separation membrane, which exhibits an excellent film-forming property and excellent mechanical strength when used for supporting a separation membrane such as a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane and a reverse osmotic membrane. Also disclosed are a separation membrane and a fluid separation element each utilizing the support. Specifically disclosed is a support for a separation membrane, which comprises a long-fiber nonwoven fabric composed of a thermoplastic continuous filament. The thermoplastic continuous filament is preferably a complex-type filament comprising a high-melting-point polymer and a low-melting-point polymer having a melting point lower by 10 to 140 DEG C than that of the high-melting-point polymer and arranged around the high-melting-point polymer.

Description

technical field [0001] The present invention relates to a separation membrane support made of long-fiber non-woven fabric for supporting separation membranes such as microfiltration membranes, ultrafiltration membranes, nanofiltration membranes, and reverse osmosis membranes, and a manufacturing method thereof, wherein the long fiber Fibrous nonwovens are composed of thermoplastic continuous filaments. In addition, the present invention also relates to a separation membrane and a fluid separation element using the separation membrane support. Background technique [0002] In recent years membrane technology has been used in many cases for water treatment. For example, microfiltration membranes and ultrafiltration membranes have been used for water treatment in water purification plants, and reverse osmosis membranes have been used for desalination of seawater. In addition, reverse osmosis membranes and nanofiltration membranes have been used for the treatment of semiconduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B32B5/26D04H3/16
CPCD04H13/007D04H3/14B32B5/26B01D69/10B01D71/68D04H3/16B32B5/022B32B5/08B32B5/22B32B2250/20B32B2262/0276B32B2262/12B32B2307/40B32B2307/50B32B2307/538B32B2307/54B32B2307/718B32B2307/72B32B2307/724B32B2307/734Y10T442/60Y10T442/66Y10T442/671Y10T442/681
Inventor 羽根亮一荻原淳松浦博幸中野洋平涩泽直树楫野龙哉矢掛善和
Owner TORAY IND INC
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