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A kind of non-woven fabric with two-component gradient structure for water filtration and its preparation method and application

A gradient structure, non-woven fabric technology, applied in the field of non-woven fabrics, can solve the problems of short service life, low filtration accuracy, single structure, etc., and achieve the effects of long service life, high filtration accuracy, and improved filtration capacity

Active Publication Date: 2019-08-13
SHANDONG TAIPENG ENVIRONMENTAL PROTECTION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the existing polyester round filament nonwoven filter material with single structure, short service life, large pressure drop and low filtration accuracy, the present invention provides a two-component gradient nonwoven fabric for water filtration and its preparation Methods and Applications

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
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  • A kind of non-woven fabric with two-component gradient structure for water filtration and its preparation method and application

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preparation example Construction

[0030] The present invention also includes a method for preparing a nonwoven fabric with a two-component gradient structure for water filtration, comprising the following steps:

[0031] ①PET and COPET are pre-crystallized, sliced ​​and dried to obtain PET slices and COPET slices;

[0032] ②The PET chips and COPET chips obtained in step ① are melted and accumulated, spun, cooled, drawn and divided into a web through the first group of spinning components to obtain the first layer of fiber web;

[0033] ③The PET slices and COPET slices obtained in step ① are melted and accumulated, spun, cooled, drawn and divided into a web through the second group of spinning components to obtain the second layer of fiber web;

[0034] ④ Lay the second layer of fiber web obtained in step ③ on the first layer of fiber web obtained in step ②, superimpose to obtain a composite fiber web, and then bond the composite fiber web with hot air to obtain a two-component gradient nonwoven fabric for wate...

Embodiment 1

[0040] A non-woven fabric with a two-component gradient structure for water filtration, consisting of a first layer of fiber web and a second layer of fiber web bonded together, wherein the first layer of fiber web is made of trilobal PET with a linear density of 6D. Silk fibers and circular COPET filament fibers with a linear density of 4D, and trilobal PET filament fibers account for 70% of the quality of the first layer of web; the second layer of web is made of trilobal PET with a linear density of 2D The filament fiber and the circular COPET filament fiber with a linear density of 1D are composed, and the trilobal PET filament fiber accounts for 70% of the mass of the second layer of fiber web.

Embodiment 2

[0042] A non-woven fabric with a two-component gradient structure for water filtration, consisting of a first layer of fiber web and a second layer of fiber web bonded together, wherein the first layer of fiber web is made of trilobal PET with a linear density of 6D. Silk fibers and circular COPET filament fibers with a linear density of 1D, and trilobal PET filament fibers account for 95% of the quality of the first layer of web; the second layer of web is made of trilobal PET with a linear density of 6D The filament fiber and the circular COPET filament fiber with a linear density of 4D are composed, and the trilobal PET filament fiber accounts for 95% of the quality of the second layer of fiber web.

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Abstract

The invention discloses a two-component gradient structure non-woven fabric for water filtering and a preparation method thereof. The non-woven fabric is composed of a first-layer fiber web and a second-layer fiber web which are bonded together, wherein the first-layer fiber web and the second-layer fiber web are each composed of trefoil PET filament fibers and circular COPET filament fibers which have different finenesses. The preparation method comprises the steps that PET slices and COPET slices which are subjected to pre-crystallization are fully dried; fusion overstocking, spinning, cooling, drafting and separation lapping are conducted through two groups of different spinning assemblies, then the obtained two layers of fiber webs are overlapped to form a composite fiber web, and finally the composite fiber web is subjected to hot air bonding and melting to be reinforced into a whole. According to the two-component gradient structure non-woven fabric for water filtering, the advantages of different fineness filtering in a filter material can be fully exerted, the filtering efficiency is guaranteed, the service life is effectively prolonged, and pressure drop is controlled within a reasonable range; accordingly, the non-woven fabric has the advantages of being free of rolling points, high in ventilation property and filtering precision, low in pressure drop and long in service life.

Description

technical field [0001] The invention relates to the technical field of nonwoven fabrics, in particular to a nonwoven fabric with a two-component gradient structure for water filtration, a preparation method and application thereof. Background technique [0002] Polyester non-woven fabric is made of polyester filament fiber hot-melt bonding. During the bonding process, it relies on self-melting bonding and entanglement to form a three-dimensional microporous structure randomly arranged in space. It is mainly used as a filter material. The filter material is mainly through the inter-fiber pore size and the interaction between the single fiber and the particles, that is, when the liquid passes through, the larger particles will be blocked by the pore size between the fibers and deposited, and the smaller particles will change the flow direction when the liquid encounters the fibers, and the particles will flow under their own gravity. Under the action of changing the flow direc...

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
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/011D04H3/018D04H3/14B01D39/16
CPCB01D39/1623D04H3/011D04H3/018D04H3/14
Inventor 王海平王绪华张书振孙晓磊张静张泉城朱绍存杨会敏李啟帆褚菲菲王敏刘利防路红赵雪峰
Owner SHANDONG TAIPENG ENVIRONMENTAL PROTECTION MATERIAL
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