Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method and application of gradient structure pet melt-blown non-woven fabric for secondary forming filter of double rolling mill

A technology of melt-blown non-woven fabric and gradient structure, which is applied in the direction of separation methods, filtration separation, chemical instruments and methods, etc. It can solve the problems of reducing the dirt-holding capacity of materials, reducing the tearing strength of materials, and reducing the filtration accuracy of materials. Ensures filtration efficiency, improves water/air pressure resistance, and has a long service life

Active Publication Date: 2021-09-28
SHANDONG TAIPENG ENVIRONMENTAL PROTECTION MATERIAL
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the larger pore size reduces the filtration accuracy of the material; on the other hand, the higher the thermal bonding temperature and the greater the pressure, the more favorable it is to obtain a smaller pore size and improve the filtration accuracy, but it destroys the single fiber The structure in turn reduces the tear strength of the material, and the smaller pore size also reduces the dirt-holding capacity of the material

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
  • A kind of preparation method and application of gradient structure pet melt-blown non-woven fabric for secondary forming filter of double rolling mill
  • A kind of preparation method and application of gradient structure pet melt-blown non-woven fabric for secondary forming filter of double rolling mill
  • A kind of preparation method and application of gradient structure pet melt-blown non-woven fabric for secondary forming filter of double rolling mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] According to the preparation steps of the above preparation method, firstly, PET chips with a viscosity of 0.45dl / g and a melting point of 265°C are pre-crystallized at 120°C for 30 minutes and fully dried at 160°C for 8 hours to obtain PET meltblown fibers by melt blown method , and then use hot air at 0.2MPa and 340°C for drafting to obtain PET melt-blown fiber web; pass the fiber web through a 130°C, 70N primary flat roll mill and a 220°C, 20N secondary flat roll mill to obtain PET melt-blown non-woven fabric. The fiber fineness of PET melt-blown non-woven fabric is 0.25D, and the weight range is 50g / m 2 , the thickness is 0.4mm. The thickness of the internal loose macroporous structure of PET meltblown non-woven fabric is 0.24mm, the pore diameter ranges from 20μm to 25μm, and the thickness of the external dense small pore structure is 0.08mm, and the pore diameter ranges from 3μm to 5μm.

Embodiment 2

[0043] PET chips with a viscosity of 0.45dl / g and a melting point of 265°C are pre-crystallized and fully dried to obtain a PET melt-blown fiber web, and the fiber web is passed through a 140°C, 80N primary flat roll mill and a 220°C, 30N The second flat roll mill obtains PET melt-blown nonwovens with gradient structure. The fiber fineness of PET melt-blown non-woven fabric is 0.25D, and the weight range is 70g / m 2 , the thickness is 0.45mm. The pore diameter range of the internal loose macroporous structure of PET melt-blown non-woven fabric is 17 μm to 20 μm, and the pore diameter range of the external dense small pore structure is 3 μm to 5 μm.

Embodiment 3

[0047]PET chips with a viscosity of 0.4dl / g and a melting point of 265°C are pre-crystallized and fully dried to obtain a PET melt-blown fiber web, and the fiber web is passed through a 140°C, 85N primary flat roll mill and a 230°C, 40N The second flat roll mill obtains PET melt-blown nonwovens with gradient structure. The fiber fineness of PET melt-blown non-woven fabric is 0.35D, and the weight range is 90g / m 2 , the thickness is 0.5mm. The thickness of the internal loose macroporous structure of PET meltblown non-woven fabric is 0.3mm, the pore diameter ranges from 20μm to 25μm, and the thickness of the external dense small pore structure is 0.1mm, and the pore diameter ranges from 5μm to 7μm.

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
melting pointaaaaaaaaaa
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method and application of a gradient-structure PET melt-blown non-woven fabric for secondary molding and filtration of double rolling mills, including the preparation of a PET melt-blown fiber layer, and passing the obtained fiber layer through a hot rolling mill at a temperature of 120 to 160 ° C. , under the condition of pressure of 30-60N for the first complete thermal bonding; and then through the hot rolling mill again at the temperature of 200-240 ℃ and the pressure of 40N-100N for the second incomplete thermal bonding to obtain a gradient structure PET melt Spray non-woven fabric. The PET meltblown nonwoven fabric obtained in the present invention has the advantages of large air permeability, high filtration precision, small pressure drop and long service life when applied to liquid / gas filtration.

Description

technical field [0001] The invention relates to the technical field of melt-blown non-woven fabrics, in particular to a preparation method and application of a gradient-structure PET melt-blown non-woven fabric for secondary molding and filtration by double rolling mills. Background technique [0002] The current PET melt-blown non-woven fabrics mostly use high-temperature and high-pressure one-time thermal bonding technology, and the pore size distribution range is narrow. When filtering, most of the particles are intercepted on the surface of the filter layer, and the surface voids are easily filled. However, the internal voids are not effectively utilized, and the pressure rises rapidly during the filtration process, which makes the filter material unable to fully play its role and reduces the dirt-holding capacity of the material. [0003] In addition, the one-time thermal bonding technology determines that high filtration accuracy, high dirt holding capacity and high te...

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 Patents(China)
IPC IPC(8): D04H1/55D04H1/56B01D39/08
CPCB01D39/083D04H1/55D04H1/565
Inventor 刘建三朱绍存王海平于培杨会敏褚菲菲刘利防王绪华张静张泉城张书振程翠翠
Owner SHANDONG TAIPENG ENVIRONMENTAL PROTECTION MATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com