Filter medium

A filter material and aggregate technology, applied in the fields of filtration separation, climate change adaptation, climate sustainability, etc., can solve problems such as peeling, and achieve the effects of less pressure loss rise, uniform texture, and excellent thermal dimensional stability

Inactive Publication Date: 2006-05-03
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the fiber web layer composed of laminated polytetrafluoroethylene short c

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0126] Example 1

[0127] Using PPS staple fiber with a fineness of 3.0 dtex (fiber diameter 17μm) and a length of 76mm (Toray Co., Ltd. "Tolucon (R)" S101-3.0T76mm), a single yarn count of 20s and a number of twisted yarns were obtained. Short fiber yarn (total fineness 600 dtex). It was woven flat to obtain a PPS staple fiber plain weave fabric with a warp density of 26 strands / 2.54 cm and a weft density of 18 strands / 2.54 cm. Use the fabric as the bone material, with 194g / m on one side 2 The weight per unit area of ​​the laminated fiber web, the fiber web is 2.2 dtex (fiber diameter 14.5μm), 51mm length of PPS staple fiber (Toray Co., Ltd. "Torucon (R)" S101-2.2T51mm) and a fineness of 1.0 Decitex (fiber diameter 9.7μm), PPS staple fiber with a length of 51mm (Toray Co., Ltd. "Tolucon (R)" S101-1.0T51mm) blended at a weight ratio of 50: 50 to open cotton, After carding, the needle density is 50 needles / cm 2 Obtained by fake needle punching. This fiber web forms a filter layer o...

Example Embodiment

[0128] Example 2

[0129] As the fibers constituting the fiber web on the air inflow side, PPS short fibers with a fineness of 1.0 dtex (fiber diameter of 9.7 μm) and a pith length of 51 mm and a fineness of 2.2 dtex (fiber diameter of 14.5 μm) were combined at a ratio of 30:30:40. ), PPS staple fiber with a length of 51mm, and PPS staple fiber with a fineness of 7.8 dtex (fiber diameter 27.2μm) and a length of 51mm are mixed. Furthermore, as the fibers constituting the fiber web on the side of the air discharge surface, PPS staple fibers with a fineness of 2.2 dtex and a length of 51 mm and PPS staple fibers with a fineness of 7.8 dtex and a length of 51 mm were mixed in a ratio of 50:50. . Except for these, the same method as in Example 1 was used to obtain a filter material. The performance of the obtained filter material is shown in Table 1 and Figure 4 , 5 in.

Example Embodiment

[0130] Example 3

[0131] Except for the fibers that constitute the fiber web on the side of the air inflow surface, the PPS short fibers with a fineness of 1.0 dtex (fiber diameter of 9.7 μm) and a bundle length of 51 mm and a fineness of 2.2 dtex (fiber diameter of 14.5 μm) are combined at a ratio of 20:80 The filter material was obtained by the same method as in Example 1, except that PPS short fibers with a length of 51 mm were mixed and used. The performance of the obtained filter material is shown in Table 1 and Figure 4 , 5 in.

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Abstract

The filter material is characterized by satisfying the following (1) and (2) in the filter material containing polyphenylene sulfide fibers, thereby providing a filter material with excellent dust collection efficiency and high mechanical strength and its composition The bag filter, (1) contains at least 2 layers of fiber webs, the fiber web on the side of the air inflow side contains 50% by weight or more of heat-resistant fibers with a fiber diameter of 15 μm or less, and the fibers on the side of the air outlet side The web contains 50wt% or more of heat-resistant fibers with a fiber diameter greater than or equal to 20 μm; (2) contains a fiber web containing polyphenylene sulfide short fibers with a denier of 1 to 3 decitex and a denier of at least 20 μm; Short fibers of fluorine-based fibers in the range of 2 to 4 decitex.

Description

Technical field [0001] The present invention relates to a filter material having the function of trapping and removing pollutants in the air, such as dust, and purifying the air. The filter material of the present invention is particularly suitable for use as a dust collection filter cloth for filtering high-temperature exhaust gas discharged from a garbage incinerator, a coal-fired boiler, a metal smelting furnace, or the like, and a bag filter sewn by the filter cloth. Background technique [0002] Filter materials for purifying air include internal filtering materials and surface filtering materials, and dust collectors use surface filtering materials. The so-called surface filtration is to collect dust on the surface of the filter material, and form a dust layer on the surface of the filter material. The dust layer is gradually collected by the dust layer. When the dust layer reaches a certain thickness, the dust layer is removed from the surface of the filter material by air...

Claims

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Application Information

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IPC IPC(8): B01D39/16
CPCY02A50/2351
Inventor 山田贤孝长濑元树
Owner TORAY IND INC
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