A kind of melt blown fiber and its preparation method and application

A melt-blown fiber and melt-blown technology, applied in the field of melt-blown fiber and its preparation, can solve problems such as difficult diameter ranges

Active Publication Date: 2020-11-06
北京钧毅微纳新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diameter of the existing melt-blown fibers is mostly in the micron range, for example, in the range of 3 to 10 microns, and it is difficult to prepare melt-blown fibers with a smaller diameter range and higher uniformity through the existing preparation process

Method used

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  • A kind of melt blown fiber and its preparation method and application
  • A kind of melt blown fiber and its preparation method and application
  • A kind of melt blown fiber and its preparation method and application

Examples

Experimental program
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Effect test

preparation example Construction

[0043] [Preparation method of melt-blown fiber]

[0044] As mentioned above, the present invention provides the preparation method of above-mentioned melt-blown fiber, and described method is based on melt-blown device; Fluid devices;

[0045] The spinning assembly includes a distribution plate and a spinneret; the spinneret forms spinneret holes for melt ejection; the spinneret, distribution plate and air knife form a draft hot air flow channel for heat Air circulation; the air knife and spinneret form an air gap slit for accelerating hot air and ejecting it;

[0046] The balance cavity at the bottom of the hanger-shaped spinning die communicates with the spinneret hole formed by the spinneret in the spinning assembly, and the outlet end of the device for uniformly distributing the fluid is connected to the distribution plate and the spinneret in the spinning assembly One end of the drafting hot gas flow channel formed by the air knife communicates with the other end of the...

Embodiment 1

[0133] Such as figure 1 and 2 As shown, a clothes hanger-shaped spinning die flow channel structure for evenly distributing the melt, the die flow channel structure includes a manifold 1 and a slit flow channel 2; the manifold 1 is arranged in the slit flow the upper part of road 2;

[0134] Wherein, the manifold 1 is in the shape of a clothes hanger; the manifold 1 is a horizontal U-shaped structure, and the horizontal U-shaped structure includes a bottom end 1-1, a first side wall 1-2 of the manifold, a second manifold Two side walls 1-3 and the third side wall 1-4 of the manifold, the bottom end 1-1 of the horizontal U-shaped structure is a semicircular structure with a radius r, and the first side wall 1-2 of the manifold One end is connected tangentially to one side of the bottom end 1-1 of the horizontal U-shaped structure, and the other end of the first side wall 1-2 of the manifold is vertically connected to the third side wall 1-4 of the manifold , one end of the s...

Embodiment 2

[0152] Such as figure 1 and figure 2 As shown, the present embodiment provides a clothes-hanger-shaped spinning die, which includes the runner structure of the clothes-hanger-shaped spinning die in Embodiment 1; the clothes-hanger-shaped spinning die also includes a feed pipe, and the feed The pipe communicates with the feed port on the third side wall 1-4 of the manifold of the horizontal U-shaped structure; the feed pipe is used to connect external equipment and transport the melt into the manifold 1; the hanger-shaped The spinning die head also includes a balance cavity 5 which communicates with the outlet 4 of the slit channel.

[0153] In a preferred embodiment of the present invention, the shape of the balance chamber 5 is not particularly limited, it can be a cavity with a specific volume, the upper end of the balance chamber communicates with the outlet of the slit flow channel, and the balance chamber The lower end can communicate with other spinning components; th...

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Abstract

The invention belongs to the technical field of fibers, and particularly relates to a melt-blown fiber, a preparation method thereof and an application of the fiber. The diameter of the melt-blown fiber is 200-2000 nanometers, and the weight percentage content of the melt-blown fiber within the range of the diameter is larger than or equal to 80%. A melt-blown fiber mesh is prepared from the melt-blown fiber, the filtering effect, thermal insulation, oil absorbency and the sound absorption effect of the melt-blown fiber and the prepared melt-blown fiber mesh are improved by 10-60% as comparedwith those of a common melt-blown fiber and a common melt-blown fiber mesh, and the melt-blown fiber and the melt-blown fiber mesh have the advantages of poisonless and harmless properties and the like.

Description

technical field [0001] The invention belongs to the field of fiber technology, and in particular relates to a melt-blown fiber and its preparation method and application. Background technique [0002] Melt-blown fibers are formed by extruding molten polymer from a spinning die into a thin stream of melt, while being drawn and thinned under the pressure of high-temperature and high-speed hot air. The meltblown fibers produced by the meltblown method can be collected on a moving belt or drum and bonded to each other during the cooling process to form a meltblown nonwoven web. This fiber-to-fiber bonding method is more effective when a portion of the fiber surface consists of a material having a lower melting temperature than the material of the other portion of the fiber. Materials with low melting temperatures increase the bonding between fibers, thereby improving the integrity of the sheet, while materials with higher melting temperatures leave the fibers unaffected. Such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/56
CPCD04H1/56
Inventor 侯慕毅刘玉军王钧效李化毅
Owner 北京钧毅微纳新材科技有限公司
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