Unlock instant, AI-driven research and patent intelligence for your innovation.

Melt-spun polypropylene fine-grade nanofibrous web

A nanofiber mesh, nanofiber technology, applied in the direction of single-component polypropylene rayon, fiber processing, textile, etc., can solve problems such as low output

Inactive Publication Date: 2016-06-08
EI DU PONT DE NEMOURS & CO
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, centrifugal spinning through a nozzle has much lower yields due to capillary flow through the nozzle holes and melt die swelling at the nozzle exit

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
  • Melt-spun polypropylene fine-grade nanofibrous web
  • Melt-spun polypropylene fine-grade nanofibrous web
  • Melt-spun polypropylene fine-grade nanofibrous web

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Polypropylene (PP) homopolymer from MetoceneMF650Y (LyondellBasell), using image 3 The apparatus shown in , produces continuous fibers by spinning disks with closed teeth and fixed shutters. It has a Mw = 75,381 g / mol, a melt flow rate = 1800 g / 10 min (230°C / 2.16 kg), and a zero shear viscosity at 200°C of 9.07 Pa-S. The temperature of the spinning melt from the transfer line was set at 240°C. The temperature at the edge of the spinning disk was about 200°C. The heating air in the stretching zone was set at 250°C. The stretching zone air passing through the gap between the disc and the fixed shutter was set at 200°C and the air flow rate was 50 SCFH. The downward shaping air was set at 150°C. Shaping air flow was set at 50 SCFH. The rotational speed of the spinning disk was set at a constant 10,000 rpm.

[0071] As shown in Figure 1, the fiber size was measured from the image using a scanning electron microscope (SEM), and the number-average diameter distribution...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The present invention is directed toward a to fine-grade stand-alone nanoweb and nanofibrous membrane comprising a nanofiber network with a number average nanofiber diameter less than 200 nm and the mean flow pore size less than 1000 nm that yield the selective barrier medium with a superior balance of flow versus barrier properties.

Description

[0001] This application claims priority to US Provisional Application 61 / 893,961, filed October 22, 2013, which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a melt spun polypropylene fine grade nanofibrous web comprising a nanofiber network having a number average nanofiber diameter of less than 200 nm and a medium flow pore diameter of less than 1000 nm. Background technique [0003] The increase in the surface-to-volume ratio achieved by nanofibers has had a significant impact on a wide range of applications. Specifically, for filter performance, which is based on generating the highest flow rate while trapping and retaining the finest particles without clogging the filter, nanofibers have improved retention and inertial impact effectiveness and create slip flow at the fiber surface , resulting in better performance for a given pressure drop. Accordingly, nanofibers as coatings on or laminated to substrates...

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): D04H1/4291D04H1/4382D04H1/72D04H1/736D01D5/18
CPCD04H1/72D04H1/736D01D5/18D01D5/14D01F6/06D04H3/007D04H3/016D04H1/4291Y10T442/626D04H1/43838D04H1/724D10B2321/022D04H1/4382D10B2401/10D10B2505/04
Inventor T.黄T.P.戴利Z.R.迪沃思
Owner EI DU PONT DE NEMOURS & CO