A kind of composite floc and its preparation method and application

A flake and polymer technology, applied in melt spinning, textile and papermaking, spinneret assemblies, etc., can solve the problems of poor flame retardancy, poor thermal insulation performance, poor sound absorption effect, etc., and achieve excellent rebound The effect of rate and porosity

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

[0003] Using the existing technology, the flakes prepared by using ordinary melt-blown fibers (generally 3-10 microns in diameter) have low elasticity (rebound rate and porosity), poor thermal insulation performance, poor sound absorption effect, and poor flame retardancy. , so that it is greatly restricted in the actual application process

Method used

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  • A kind of composite floc and its preparation method and application
  • A kind of composite floc and its preparation method and application
  • A kind of composite floc and its preparation method and application

Examples

Experimental program
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preparation example Construction

[0067] [Preparation method of composite flakes]

[0068] As mentioned above, the present invention provides a method for preparing composite wadding, the composite wadding includes a melt-blown fiber layer, and the melt-blown fiber layer includes melt-blown fibers and short fibers; the average of the melt-blown fibers The diameter is 200-2000 nanometers, and the mass percentage content of the melt-blown fiber in the diameter range is greater than or equal to 80%; the method is based on a melt-blown device; the melt-blown device includes a hanger-shaped spinning die, Spin packs, air knives and devices for uniform fluid distribution;

[0069] 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;

[0070] The bala...

Embodiment 1

[0159] like 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;

[0160] 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 seco...

Embodiment 2

[0178] like 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.

[0179] 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; the b...

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Abstract

The invention belongs to the technical field of melt-blowing and particularly relates to a composite wadding sheet and a preparation method and application thereof. The composite wadding sheet comprises a melt-blown fiber layer consisting melt-blown fiber and staple fiber; the diameter of the melt-blown fiber ranges from 200 nanometer and 2000 nanometer, and the mass percent content of the melt-blown fiber within the range of the diameter is greater than or equal to 80%. The composite wadding sheet has excellent resilience rate and voidage, its filtering effect, heat insulation, flame resistance, oil absorbency and noise reduction effect is increased by 10-60% as compared with that of the wadding sheet prepared of the general melt-blown fiber, and besides, the composite wadding sheet is poisonless and harmless.

Description

technical field [0001] The invention belongs to the field of melt-blown technology, and in particular relates to a composite floc 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. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/02D01D5/098D01D4/06D01D4/00
CPCD01D5/0985D04H3/00D04H3/016
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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