Semipermeable membrane support body

A semi-permeable membrane and support technology, applied in the field of semi-permeable membrane supports, can solve problems such as insufficient and achieve the effect of excellent adhesion

Pending Publication Date: 2019-11-08
MITSUBISHI PAPER MILLS LTD
View PDF17 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Bekk smoothness is a method of pressing a glass standard surface on the surface of a semipermeable membrane support at a specified pressure, and measuring the time required to discharge a certain amount of air at a specified pressure difference during the process. The adhesiveness of the semipermeable membrane support made of olefin-based fibers softened or melted by heat treatment is not sufficient only by the Bekk smoothness

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Semipermeable membrane support body
  • Semipermeable membrane support body
  • Semipermeable membrane support body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0137] 100 parts by mass of PP / PE core-sheath fibers (average fiber diameter 10.8 μm, fiber length 5 mm) whose core component is polypropylene (melting point 165° C.) and sheath component is polyethylene (melting point 135° C.) are placed in the water of the pulper Dissociate and disperse, and stir slowly with a mixer to make a uniform slurry for papermaking. The papermaking slurry was made using a wet papermaking method using a cylinder paper machine, and dried with a hot air hood installed at the same time as a hot plate pressure bonding method set at 135°C, that is, a Yankee dryer, and simultaneously made PP / The sheath part of the PE core-sheath fiber is thermally melted and bonded to obtain a sheet, and the resulting sheet is rolled using a combination of a metal roll (heated) and a resin roll (non-heated) at a metal roll temperature of 100°C and a pressure of 100kN / m 1. Under the condition of a processing speed of 40 m / min, hot press processing was carried out in such a ...

Embodiment 1-2

[0139] Change the formula to 70 parts by mass of PP / PE core-sheath fiber (average fiber diameter 10.8 μm, fiber length 5 mm), 30 parts by mass of PP single fiber (average fiber diameter 11.0 μm, fiber length 5 mm). The same method as in Example 1-1 was used to obtain a semipermeable membrane support.

Embodiment 1-3

[0141] Change the recipe to 60 parts by mass of PP / PE core-sheath fiber (average fiber diameter 10.8 μm, fiber length 5 mm), 40 parts by mass of PP single fiber (average fiber diameter 11.0 μm, fiber length 5 mm). The same method as in Example 1-1 was used to obtain a semipermeable membrane support.

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
Login to view more

PUM

PropertyMeasurementUnit
breaking strengthaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The problem addressed by the present invention is to provide a semipermeable membrane support body that contains olefinic fiber, wherein: the semipermeable membrane support body can withstand repeatedwashing and backwashing; the semipermeable membrane component is easily permeated, but bleed through does not occur easily; the adhesiveness of the semipermeable membrane body and the semipermeable membrane is superior; and the adhesiveness of a non-coated surface and a resin frame is also superior. Provided is a semipermeable membrane support used by being provided with a semipermeable membrane,wherein: the semipermeable membrane support body is formed from a wet type nonwoven fabric having polypropylene as a core component and containing core-sheath type composite fibers with polyethyleneas a sheath component; and the rupture strength of the semipermeable membrane support body is 300-1000 kPA, or the Bekk smoothness and 75 degree specular surface glossiness for a coated surface of thesemipermeable membrane support body provided with the semipermeable membrane are higher than the Bekk smoothness and the 75 degree specular surface glossiness of the non-coated surface which is on the opposite side of the coated surface.

Description

technical field [0001] The present invention relates to semipermeable membrane supports. Background technique [0002] Semipermeable membranes are widely used in the fields of seawater desalination, water purifiers, food concentration, waste water treatment, medical applications such as blood filtration, and ultrapure water production for washing semiconductors. The separation function layer of the semipermeable membrane is composed of porous resins such as cellulose-based resins, polysulfone-based resins, polyacrylonitrile-based resins, fluorine-based resins, and polyester-based resins. However, these porous resins have poor mechanical strength alone, so a composite form in which a semipermeable membrane is provided on one side of a semipermeable membrane support including a fibrous base material such as a nonwoven fabric or a woven fabric, that is, " filter membrane". In the semipermeable membrane support, the surface on which the semipermeable membrane is provided is re...

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
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D71/26D01F8/06D04H1/541
CPCB01D69/10B01D2325/24D04H1/5412D04H1/5418D04H1/5414Y02A20/131B01D69/1071B01D71/26D01F8/06D04H1/541D04H1/544D01D5/34B01D69/02D10B2321/021D10B2321/022D10B2401/20D10B2505/04B01D71/262B01D71/261
Inventor 大山圭介志水祐介落合贵仁增田敬生
Owner MITSUBISHI PAPER MILLS LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap