Filter medium and filter unit

A filter material and single fiber technology, applied in the field of filter material and filter units using the filter material, can solve the problems of undisclosed fiber physical properties, small elongation, practical filter material, high air permeability, etc., and save energy. , low noise, high air permeability

Active Publication Date: 2010-02-17
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the literature only states that if the papermaking method is used, fibers with a high Young's modulus can be used, and for an air permeability of 100cm 3 / cm 2 · Seconds or more (further 250cm 3 / cm 2 ・Above seconds) High air permeability, and rigid filter material that is difficult to deform even when filtered at high wind speeds, its fiber structure, and fiber physical properties have not been disclosed
[0011] As mentioned above, there is no practical filter material with organic fiber as the main body, high air permeability, high wind speed filtration, small elongation and practicality.

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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Examples

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preparation example Construction

[0062] The method for producing the nonwoven fabric may, for example, be a wet papermaking method, an air-laid method, a dry chemical bonding method, a thermal bonding method, or a spunbonding method. The wet papermaking method or the air-laid method is a method of aggregating short non-curled staple fibers with a fiber length of several mm-10mm to obtain a nonwoven fabric. The dry chemical bonding method is a method in which crimped short fibers are formed into a web through a carding machine, then impregnated with an emulsified resin, dried, and fixed between the fibers to prepare a nonwoven fabric. The thermal bonding method is a method in which short fibers containing crimped hot-melt-adhesive short fibers are formed into a web through a carding machine, and then the fibers are thermally melt-bonded to prepare a non-woven fabric. The spunbond method is a method in which the polymer is pulled out of a small hole in a dissolved state, and then solidified to directly make a n...

Embodiment 1

[0147] By the wet papermaking method of inclined net mode, prepare by non-crimp vinylon fiber (contain the fiber of 20 mass % Young's modulus 180cN / dtex, denier 7dtex, fiber length 10mm), non-crimp polyester fiber ((1) contains 21% by mass of fibers with a Young's modulus of 65 cN / dtex, a fineness of 10 dtex, and a fiber length of 10 mm, (2) containing 49% by mass of fibers with a Young's modulus of 65 cN / dtex, a fineness of 17 dtex, and a fiber length of 18 mm), pulp (10% by mass ) composed of 37.5g / m 2 of fiber aggregates. Then, the fiber aggregate was impregnated in a liquid with a solid content of 30% of styrene / acrylic polymer (glass transition temperature Tg 30°C, film-forming temperature 45°C), and dried and heat-treated to prepare mesh weight 46.8g / m 2 , thickness 0.410mm, air permeability 375cm 3 / cm 2 Seconds (2 pieces overlap), apparent density 0.114g / cm 3 , Tensile strength at 1% elongation 180N / cm 2 , Non-woven fabric with a strength index of 1579N·cm / g. The...

Embodiment 2

[0153] Except for changing the constituent fibers of the nonwoven fabric as shown in Table 1 and Table 2, it was carried out in the same manner as in Example 1. As a result, a filter unit can be made in which structural pressure loss occurs less. The filter unit is also proven to be a low pressure drop high capture, long life filter.

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Abstract

A filter medium which is not stretched by wind pressure even when having a small thickness; and a filter unit which enables a treatment in a large gas quantity. The filter medium is made of a nonwovenfabric which consists mainly of organic fibers and in which the single fibers have been fixed to one another. The nonwoven fabric is constituted of two or more kinds of single fibers differing in Young's modulus and fineness and contains noncrimped single fibers having a Young's modulus of 150 cN / dtex or higher and a fineness of 7 dtex or higher in a proportion of 20% or higher based on the totalmass of the fibers. The single fibers are fixed to one another with a resin having a glass transition temperature of 30 DEG C or higher.

Description

technical field [0001] The invention relates to a filter material and a filter unit using the filter material. Background technique [0002] The required performance of the filter unit is to have the low pressure loss which shows whether it can handle large air volume while having the collection efficiency. The speed of air passing through the filter material is getting faster and faster. In the past, it was about 15m / min, but now it has reached 25m / min-40m / min, which is more than 1.5 times the high wind speed filtration, but it requires roughly the same pressure loss as before. For example, in a small filter unit for an air conditioner, it is required to be below 40 Pa (the collection efficiency obtained by the colorimetric method is 90%), and in a filter unit for an automobile air conditioner, it is required to be about 85 Pa (according to JIS 15 dust collection efficiency). Set efficiency is about 91%) below the performance. [0003] In order to reduce the thickness of ...

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 Applications(China)
IPC IPC(8): B01D39/16B01D39/00B01D46/52D04H1/4382
CPCB01D39/1623B01D2239/0636Y10T442/60B01D39/00B01D39/16B01D46/52
Inventor 富樫良一
Owner TORAY IND INC
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