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    11.
    发明专利
    未知

    公开(公告)号：NO20004666L

    公开(公告)日：2000-11-16

    申请号：NO20004666

    申请日：2000-09-19

    Applicant: AHLSTROM GLASSFIBRE OY

    Inventor： ROEKMAN KAY ,  SABEL HOKAN

    IPC: B32B5/26 ,  B29C70/12 ,  B32B17/02 ,  D04H1/42 ,  D21H13/26 ,  D21H17/36 ,  D21H17/52 ,  H05K1/03 ,  H05K3/02 ,  D04H

    Abstract: A printed circuit board is made from at least one non-woven sheet or web layer comprising at least 10 % weight aramid fibers, with any balance substantially electrically non-conductive fibers, filler, and binder. The sheet or web is preferably made by the foam process, and at least about 10 % (e.g. at least about 60 %) of the aramid fibers utilized are aramid pulp fibers which have a number of advantages compared to the conventional straight aramid fibers. The web or sheet is preferably compressed so that it has a density of about 0.1-0.2 grams per cubic. centimeter; and the web or sheet has a basis weight of between about 20-120 grams per square meter. The web may also have a substantially electrically non-conductive binder such as PVA or an epoxy resin. A printed circuit board made using the aramid layers of non-woven webs or sheets is otherwise conventional, including a pre-preg material, electrically conductive circuit elements, and electronics.

    13.
    发明专利
    未知

    公开(公告)号：DE60107223D1

    公开(公告)日：2004-12-23

    申请号：DE60107223

    申请日：2001-04-05

    Applicant: AHLSTROM GLASSFIBRE OY KARHULA

    Inventor： ROEKMAN KAY ,  JANSSON JUHANI ,  KOSTAMO HARRI ,  BOHM JUHA

    IPC: D04H1/70 ,  D04H1/42 ,  D04H1/542 ,  D04H1/58 ,  D04H13/00 ,  D06M15/333 ,  D06M15/55 ,  D06M101/00 ,  D21H13/14 ,  D21H13/18 ,  D21H13/24 ,  D21H13/26 ,  D21H13/40 ,  D21H13/50 ,  D21H15/00 ,  D21H15/02 ,  D21H21/16

    Abstract: A non-woven mat useful for a wide variety of purposes, including forming reinforced resin products, is produced in a manner having different specific uses of, and advantages over, conventional chopped strand mats and conventional glass tissue. The mat is preferably made by the foam process (but may be made by the liquid process), and at speeds well in excess of 60 m./min., and has a substantially uniform construction even when low density (e.g. 100 g/m2 or less). At least 20% (preferably at least 85%) of the fibers are in fiber bundles with between 5-450 fibers/bundle. The fibers (typically at least 85%) have a length between 5-100 mm, preferably 7-50 mm, substantially the same as the length of the fiber bundle they are in. The fibers are preferably held in the bundles by substantially non-water soluble sizing, such as epoxy resin or PVOH. The fibers in the bundles typically have diameters of approximately 7-500 microns, preferably about 7-35 microns. The bundles may comprise at least 10% reinforcing fibers, such as glass, aramid or acrylic.

    14.
    发明专利
    未知

    公开(公告)号：BR0207584A

    公开(公告)日：2004-07-27

    申请号：BR0207584

    申请日：2002-02-15

    Applicant: AHLSTROM GLASSFIBRE OY

    Inventor： GEORGE JONATHAN ,  GROSSO ANDREA ,  LAINE EINO ,  RAHIALA HANNA ,  ROEKMAN KAY

    IPC: B29C39/16 ,  B29K105/04 ,  B29K105/08 ,  B29L31/14 ,  D21F11/00 ,  D04H1/00

    Abstract: Disclosed is a method of producing a non-woven web of fibrous or particulate material comprising: formation of a foam slurry; deposition of that slurry onto a foraminous element having a three-dimensional mold; and formation of a web having a three-dimensional shape that is not substantially planar by removal of foam from the slurry through the foraminous element and drying the web. An apparatus therefor is also disclosed. The method may be used in production a variety of products, including automotive pleated fluid and air filters, pleated heating and/or air conditioning (HVAC) filters, shaped breathing mask filters and bacterial filters, laminated cleaning products with super-absorbent middle layers, such as a mop wipe shape to fit a cleaning mop head, and other products.

    15.
    发明专利
    未知

    公开(公告)号：FI112392B

    公开(公告)日：2003-11-28

    申请号：FI965110

    申请日：1996-12-19

    Applicant: AHLSTROM GLASSFIBRE OY

    Inventor： ELONEN JORMA ,  JANSSON JUHANI ,  KOSO ARTO ,  ROEKMAN KAY

    IPC: B01D19/00 ,  D21F11/00

    Abstract: A non-woven web of fibrous material is produced using a moving foraminous element in the practice of the foam process. A first foam slurry of air, water, fibers and a surfactant is generated and centrifugally pumped into contact with the moving foraminous element. Substantially fiber-free foam is withdrawn from the foraminous element while forming a non-woven web of fibrous material on the foraminous element, and at least a part of the substantially fiber-free foam is used in the generation of the first foam slurry. Recycling is also typically practiced using a centrifugal pump, and the centrifugal pumps are preferably degassing pumps which remove some of the gas from the foam. By practicing the invention it is possible to produce fibrous webs using the foam process that are more than two meters wide, and at a forming speed of more than about 100 m/min (e.g. about 200-500 m/min).

    16.
    发明专利
    未知

    公开(公告)号：DE69719380T2

    公开(公告)日：2003-10-23

    申请号：DE69719380

    申请日：1997-12-18

    Applicant: AHLSTROM GLASSFIBRE OY KARHULA

    Inventor： ELONEN JORMA ,  JANSSON JUHANI ,  KOSO ARTO ,  ROEKMAN KAY

    IPC: D04H1/70 ,  B01D19/00 ,  D21F11/00

    Abstract: A non-woven web of fibrous material is produced using a moving foraminous element in the practice of the foam process. A first foam slurry of air, water, fibers and a surfactant is generated and centrifugally pumped into contact with the moving foraminous element. Substantially fiber-free foam is withdrawn from the foraminous element while forming a non-woven web of fibrous material on the foraminous element, and at least a part of the substantially fiber-free foam is used in the generation of the first foam slurry. Recycling is also typically practiced using a centrifugal pump, and the centrifugal pumps are preferably degassing pumps which remove some of the gas from the foam. By practicing the invention it is possible to produce fibrous webs using the foam process that are more than two meters wide, and at a forming speed of more than about 100 m/min (e.g. about 200-500 m/min).

    17.
    发明专利
    未知

    公开(公告)号：FI20012168A

    公开(公告)日：2003-05-10

    申请号：FI20012168

    申请日：2001-11-09

    Applicant: AHLSTROM GLASSFIBRE OY

    Inventor： BLOMQVIST RAINER ,  LAINE EINO ,  KOSTAMO HARRI ,  ROEKMAN KAY

    IPC: D21F1/02 ,  D21F11/00 ,  D21F11/02 ,  D21H27/30 ,  B29C

    Abstract: The present invention relates to a method and apparatus for foam forming, wherein fibrous foam suspension is introduced from the head box ( 78, 178 ) of a production machine to the web forming section thereof. At least one solid material is mixed into the foam in the head box ( 78, 178 ). The method and the apparatus of the invention are particularly suitable for manufacturing various web-like products of cellulose, glass fiber, aramide, sisal, or other corresponding fibre material.

    METHOD AND APPARATUS FOR FOAM CASTING USING THREE-DIMENSIONAL MOLDS
    19.
    发明专利
    METHOD AND APPARATUS FOR FOAM CASTING USING THREE-DIMENSIONAL MOLDS 未知

    公开(公告)号：CA2439350C

    公开(公告)日：2007-07-31

    申请号：CA2439350

    申请日：2002-02-15

    Applicant: AHLSTROM GLASSFIBRE OY

    Inventor： RAHIALA HANNA ,  LAINE EINO ,  GROSSO ANDREA ,  GEORGE JONATHAN ,  ROEKMAN KAY

    IPC: B29C39/16 ,  D04H1/00 ,  B29K105/04 ,  B29K105/08 ,  B29L31/14 ,  D21F11/00 ,  D21J3/00

    Abstract: Disclosed is a method of producing a non-woven web of fibrous or particulate material comprising: formation of a foam slurry; deposition of that slurry onto a foraminous element having a three-dimensional mold; and formation of a web having a three-dimensional shape that is not substantially planar by removal of foam from the slurry through the foraminous element and drying th e web. An apparatus therefor is also disclosed. The method may be used in production a variety of products, including automotive pleated fluid and air filters, pleated heating and/or air conditioning (HVAC) filters, shaped breathing mask filters and bacterial filters, laminated cleaning products wi th super-absorbent middle layers, such as a mop wipe shape to fit a cleaning mo p head, and other products.

    20.
    发明专利
    未知

    公开(公告)号：DE60107223T2

    公开(公告)日：2005-11-10

    申请号：DE60107223

    申请日：2001-04-05

    Applicant: AHLSTROM GLASSFIBRE OY KARHULA

    Inventor： ROEKMAN KAY ,  JANSSON JUHANI ,  KOSTAMO HARRI ,  BOHM JUHA

    IPC: D04H1/70 ,  D04H1/42 ,  D04H1/542 ,  D04H1/58 ,  D04H13/00 ,  D06M15/333 ,  D06M15/55 ,  D06M101/00 ,  D21H13/14 ,  D21H13/18 ,  D21H13/24 ,  D21H13/26 ,  D21H13/40 ,  D21H13/50 ,  D21H15/00 ,  D21H15/02 ,  D21H21/16

    Abstract: A non-woven mat useful for a wide variety of purposes, including forming reinforced resin products, is produced in a manner having different specific uses of, and advantages over, conventional chopped strand mats and conventional glass tissue. The mat is preferably made by the foam process (but may be made by the liquid process), and at speeds well in excess of 60 m./min., and has a substantially uniform construction even when low density (e.g. 100 g/m2 or less). At least 20% (preferably at least 85%) of the fibers are in fiber bundles with between 5-450 fibers/bundle. The fibers (typically at least 85%) have a length between 5-100 mm, preferably 7-50 mm, substantially the same as the length of the fiber bundle they are in. The fibers are preferably held in the bundles by substantially non-water soluble sizing, such as epoxy resin or PVOH. The fibers in the bundles typically have diameters of approximately 7-500 microns, preferably about 7-35 microns. The bundles may comprise at least 10% reinforcing fibers, such as glass, aramid or acrylic.

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