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Bi-component polyester coarse fibre, filter material and preparation thereof

A filter material and crude fiber technology, applied in the field of polyester crude fiber, can solve the problems of low porosity, air permeability, poor water permeability, large rolling point, etc., to improve water permeability, slow increase in pressure loss, and long life long effect

Inactive Publication Date: 2008-11-12
TONGXIANG JIANMIN FILTER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fiber consolidation adopts hot rolling process, the rolling point is relatively large, the material opening rate is low, and the air permeability and water permeability are very poor

Method used

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  • Bi-component polyester coarse fibre, filter material and preparation thereof
  • Bi-component polyester coarse fibre, filter material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The two-component polyester crude fiber has a skin-core structure, the skin is a low-melt polymer, the core is a high-melt polyester, and the fiber thickness is 4-8dpf; the high-melt polyester and the low-melt polymer The difference between the melting points is ≥15°C.

[0039] The low-melting-point polymer is a modified polyester with a melting point of 215-235° C., which is purchased through commercial channels.

[0040] The high-melting-point polyester is a polyester (polyethylene terephthalate) with a melting point of 250-255° C., which is commercially available.

[0041] Described crude fiber section is trefoil (referring to figure 1 ).

[0042] The preparation method of the two-component polyester crude fiber filter material of the present invention comprises the following steps:

[0043] (1) Extrude the low-melting point polymer and the high-melting point polyester from two groups of different extruders in a molten state, and spin through a composite spinneret...

Embodiment 2

[0052] The low-melting-point polymer is changed to polypropylene with a melting point of 165° C. to 175° C., purchased through commercial channels. Others are the same as in Example 1.

[0053] The filter material prepared in this embodiment is tested and compared with the traditional filter material as shown in Table 2.

[0054] Table 2

[0055] Test items

Embodiment 3

[0057]The low-melting-point polymer is changed to polyethylene with a melting point of 132° C. to 135° C., purchased through commercial channels. The high-melting-point polyester is changed to PBT (polybutylene terephthalate) with a melting point of 225-235° C., which is commercially available. Described crude fiber cross-section is changed into triangular (referring to figure 2 ). Others are the same as in Example 1.

[0058] The prepared different filter materials are tested and compared with the traditional filter materials as shown in Table 3.

[0059] table 3

[0060] Test items

[0061] It can be seen from the data in Tables 1 to 3 that the filter material of the present invention has better air permeability and water permeability, higher mechanical properties and lower pressure loss than the traditional polyester spunbonded nonwoven fabric.

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Abstract

The invention relates to a coarse polyester fiber, a filter material made of the coarse fiber and a preparation method thereof. The double-component coarse polyester fiber is skin-warped-core structure, wherein, the skin is polymer with low-melting point, the core is polyester with high-melting point, and the coarseness of fiber is 4-8 dpf; the melting point difference between the high-melting point polyester and the low-melting point polymer is not less than 15 DEG C. The preparation method of the double-component coarse polyester fiber consists of the following steps: the low-melting point polymer and the high-melting point polyester are extruded from two different extruders under melting condition and the double-component coarse polyester fiber is formed by composite spinneret spinning. The double-component coarse fiber and the polyester spun-bond filter material of the invention have excellent air permeability and water permeability, outstanding mechanical properties, low pressure loss, long service life and striking economic benefits.

Description

(1) Technical field [0001] The invention relates to a polyester thick fiber, a filter material made of the thick fiber and a preparation method thereof. (2) Background technology [0002] The traditional polyester spunbonded non-woven fabric uses a kind of polyester chip, the fiber is thinner, the thickness is below 4dpf, and the fiber cross section is circular. The stiffness of the material is very poor, so it cannot be directly used to make filters. It needs to be soaked in glue to increase the stiffness of the material by the hardness of the glue. Fiber consolidation adopts hot rolling process, the rolling point is relatively large, the material opening rate is low, and the air permeability and water permeability are very poor. (3) Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a two-component polyester crude fiber with high stiffness, good air permeability and water permeability, a filter material made of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/34D01D5/253D01F8/06D01F8/14D04H3/14B01D39/08D04H3/011D04H3/018
Inventor 陈胜发
Owner TONGXIANG JIANMIN FILTER MATERIALS
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