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    2.
    发明专利
    未知

    公开(公告)号：DE3501726A1

    公开(公告)日：1986-07-24

    申请号：DE3501726

    申请日：1985-01-19

    Applicant: HOECHST AG

    Inventor： SEIFRIED WALTER DR ,  CRASS GUENTHER

    IPC: B32B27/32 ,  C09J7/02 ,  C09J3/14 ,  C09J3/26 ,  C08J5/18 ,  B32B7/10

    Abstract: Disclosed is an adhesive tape based on a co-extruded, three-layer polypropylene base film which has been biaxially stretch-oriented in at least three stages and has been subjected on at least one side to corona treatment. The base film comprises a base layer and two covering layers. The base layer comprises polypropylene. The covering layer adjacent the adhesive layer includes polypropylene modified with a natural or synthetic resin having a softening point of about 70 DEG to 170 DEG C., and the other covering layer includes polypropylene modified with a diorganopolysiloxane. The new adhesive tape possesses high values of mechanical properties. The tape has good printability, and it does not contain an adhesion-promoting layer for the adhesive, nor a separating layer (release coat), since such layers are not required. The tape can also be processed without appreciable draw-off noises.

    Solar collector, preventing energy losses by reflection - in which collector surface is covered by lenses focussing through reflector apertures
    3.
    发明专利
    Solar collector, preventing energy losses by reflection - in which collector surface is covered by lenses focussing through reflector apertures 未知

    公开(公告)号：DE2554243A1

    公开(公告)日：1977-06-08

    申请号：DE2554243

    申请日：1975-12-03

    Applicant: HOECHST AG

    Inventor： SEIFRIED WALTER DR

    IPC: F24J2/50 ,  F24S23/30 ,  F24J3/02

    Abstract: A solar collector comprises an absorber provided with heat transferring and transporting units, and a shielding unit for covering the absorption surface. Above the absorber a large number of collecting lenses are assembled in and/or on a support unit. The lenses are spherical and for pref. cover the surface in honeycomb fashion, or they may be cylindrical and be arranged in rows. Between the absorption surface and the less support unit, a layer for reflecting the radiation is arranged parallel to and close to the support unit. Apertures are provided in the reflecting layer, positioned in such a way that the light rays focussed by the collector lenses, pass through them. Device overcomes the problem of the reflection of energy by the collector and ensures an optimal conversion of the radiation reaching it, without expensive measures.

    POLYPROPYLENE ADHESIVE TAPE
    4.
    发明专利
    POLYPROPYLENE ADHESIVE TAPE 未知

    公开(公告)号：AU589153B2

    公开(公告)日：1989-10-05

    申请号：AU5250586

    申请日：1986-01-20

    Applicant: HOECHST AG

    Inventor： SEIFRIED WALTER DR ,  CRASS GUENTHER

    IPC: B32B27/32 ,  C09J7/02 ,  C09J3/26 ,  C09J3/14 ,  C08J5/18 ,  B32B7/10 ,  B32B27/18

    Abstract: Disclosed is an adhesive tape based on a co-extruded, three-layer polypropylene base film which has been biaxially stretch-oriented in at least three stages and has been subjected on at least one side to corona treatment. The base film comprises a base layer and two covering layers. The base layer comprises polypropylene. The covering layer adjacent the adhesive layer includes polypropylene modified with a natural or synthetic resin having a softening point of about 70 DEG to 170 DEG C., and the other covering layer includes polypropylene modified with a diorganopolysiloxane. The new adhesive tape possesses high values of mechanical properties. The tape has good printability, and it does not contain an adhesion-promoting layer for the adhesive, nor a separating layer (release coat), since such layers are not required. The tape can also be processed without appreciable draw-off noises.

    TUBULAR CASING, ESPECIALLY FOR SAUSAGE CASINGS, CONTAINING A COATING IMPERMEABLE TO WATER VAPOUR, PROCESS FOR ITS PRODUCTION AND USE THEREOF
    6.
    发明专利
    TUBULAR CASING, ESPECIALLY FOR SAUSAGE CASINGS, CONTAINING A COATING IMPERMEABLE TO WATER VAPOUR, PROCESS FOR ITS PRODUCTION AND USE THEREOF 未知

    公开(公告)号：DE3164908D1

    公开(公告)日：1984-08-23

    申请号：DE3164908

    申请日：1981-10-28

    Applicant: HOECHST AG

    Inventor： PORRMANN HERBERT DR ,  SEIFRIED WALTER DR ,  KLENK LUDWIG ,  STENGER KARL

    IPC: A22C13/00 ,  B29C65/00 ,  B29C65/50

    Abstract: Disclosed is a tubular casing of fiber-reinforced regenerated cellulose comprising a film web which is curved to form a tube. The edge regions of the film web, which run parallel to the longitudinal axis, abut or overlap slightly and are sealed by means of a film strip which covers both the edge regions. The film web and the film strip composed of the same material have, in the wet remoistened stage, a breaking strength of about 15 to 30 N/mm2 and an elongation at break of about 30 to 50% in the longitudinal direction of the web, and a breaking strength of about 15 to 35 N/mm2 and an elongation at break of about 30 to 50% in the transverse direction of the web. The breaking strength in the transverse direction of the web is equal to or greater than that in the longitudinal direction of the web. On its entire surface facing the film strip, the tubular casing has a substantially gas-impermeable and sealable layer, as has the film strip on the surface which comes into contact with the tubular casing. The film web is produced from viscose, and is prevented from shrinking during the process and is stretched in the transverse direction during drying. The tubular casing finds particular application as a sausage casing.

    ON ONE SIDE METALLIZED BIAXIALLY STRETCHED POLYPROPYLENE FOIL TO BE USED AS ELECTROINSULATING FOIL
    8.
    发明专利
    ON ONE SIDE METALLIZED BIAXIALLY STRETCHED POLYPROPYLENE FOIL TO BE USED AS ELECTROINSULATING FOIL 未知

    公开(公告)号：DE2964312D1

    公开(公告)日：1983-01-20

    申请号：DE2964312

    申请日：1979-11-19

    Applicant: HOECHST AG

    Inventor： SEIFRIED WALTER DR ,  JANOCHA SIEGFRIED DR ,  CRASS GUNTER

    IPC: B32B15/085 ,  B32B27/32 ,  C08J5/18 ,  C08J7/04 ,  H01B3/30 ,  H01B3/44 ,  H01G4/20 ,  B29D7/22

    Abstract: Disclosed is a biaxially stretched, composite polypropylene film suitable for use as an electrical insulating film, comprising a first layer comprising a first propylene polymer and having a maximum roughness height Rz of its exposed surface of about 0.5 mu m, and a second layer contiguous to the first layer comprising a second propylene polymer having a composition different from the first propylene polymer and having a roughness height Rz on its exposed surface ranging between about 0.2 mu m and 0.4 mu m, with the composite film having a modulus of elasticity of at least about 2000 N/mm2 in all directions of the plane of the film and a DC dielectric strength of at least about 650 V/ mu m. Also disclosed is a capacitor comprised of a plurality of these composite films having a metal surface layer and being laminated with one another.

    TUBULAR CASING WITH AN ADHESIVE SEAM PERMEABLE TO VAPOUR, FOR FOODSTUFFS, ESPECIALLY SAUSAGES, AND PROCESS FOR ITS MANUFACTURE
    9.
    发明专利
    TUBULAR CASING WITH AN ADHESIVE SEAM PERMEABLE TO VAPOUR, FOR FOODSTUFFS, ESPECIALLY SAUSAGES, AND PROCESS FOR ITS MANUFACTURE 未知

    公开(公告)号：DE3170537D1

    公开(公告)日：1985-06-20

    申请号：DE3170537

    申请日：1981-10-28

    Applicant: HOECHST AG

    Inventor： KLENK LUDWIG ,  PORRMANN HERBERT DR ,  SEIFRIED WALTER DR ,  STENGER KARL

    IPC: A22C13/00

    Abstract: Disclosed is a tubular casing of fiber-reinforced regenerated cellulose comprising a film web which is curved to form a tube. The edge regions of the film web, which run parallel to the longitudinal axis, abut or overlap slightly and are sealed by means of a film strip which covers both the edge regions. The film web and the film strip composed of the same material have, in the wet remoistened stage, a breaking strength of about 15 to 30 N/mm2 and an elongation at break of about 30 to 50% in the longitudinal direction of the web, and a breaking strength of about 15 to 35 N/mm2 and an elongation at break of about 30 to 50% in the transverse direction of the web. The breaking strength in the transverse direction of the web is equal to or greater than that in the longitudinal direction of the web. The adhesive layer is smoke-permeable and is preferably composed of a material system which sets without a chemical reaction. The film web is produced from viscose, and it is prevented from shrinking during the process and is stretched in the transverse direction during drying. The tubular casing finds particular application as a sausage casing.

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