Claims
- 1. Air-cleaning filter element which comprises at least two sheets of three-dimensionally mesh-structured elastic-flexible webs of skeletal structure containing 9 to 31 air spaces per 25 linear mm and having 3 mm to 10 mm thickness as superimposed and activated carbon adsorbent of a grain size of 1 to 5 mm in diameter which is bonded to and between the webs with a pressure-sensitive adhesive, the amount of activated carbon adsorbent deposited being 200 to 2500 g. per m.sup.2 of web.
- 2. Air-cleaning filter element as claimed in claim 1, wherein the pressure-sensitive adhesive is used in an amount ranging from 5 g. to 250 g. per square meter of web.
- 3. Air-cleaning filter element as claimed in claim 1, wherein the pressure-sensitive adhesive is used in an amount ranging from 10 g. to 200 g. per square meter of web.
- 4. Air-cleaning filter element as claimed in claim 1, wherein not less than 3 sheets of the webs are employed.
- 5. Air-cleaning filter element as claimed in claim 4, wherein the interior web or webs are bonded to adsorbent with a pressure-sensitive adhesive and each of the outer side webs is bonded to adsorbent with adhesive agent other than pressure-sensitive adhesive.
- 6. Air-cleaning filter element as claimed in claim 5, wherein each of the outer side webs is bonded to adsorbent with a synthetic rubber latex.
- 7. A method for preparing an air-cleaning filter element which comprises at least two sheets of three-dimensionally mesh structured elastic-flexible webs of skeletal structure containing 9 to 31 air spaces per 25 linear mm and having 3 mm to 10 mm thickness as superimposed, which method comprises
- (1) applying a synthetic rubber latex to and between at least two of the said sheets of elastic-flexible webs,
- (2) disposing between the said webs per m.sup.2 of web 200 to 2500 g. of activated carbon adsorbent of a grain size of 1 to 5 mm diameter and
- (3) pressing the webs together as superimposed.
Priority Claims (1)
Number |
Date |
Country |
Kind |
54/48137 |
Apr 1979 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 78,718, filed Sept. 25, 1979, now abandoned.
US Referenced Citations (2)
Continuations (1)
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Number |
Date |
Country |
Parent |
78718 |
Sep 1979 |
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