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    3.
    发明专利
    未知

    公开(公告)号：FR1403252A

    公开(公告)日：1965-06-18

    申请号：FR980799

    申请日：1964-07-06

    Applicant: BASF AG

    Inventor： OLSEN BJOERN

    IPC: G03F7/30

    Production of stiffening materials which can be heat sealed
    6.
    发明专利
    Production of stiffening materials which can be heat sealed 未知

    公开(公告)号：GB1066618A

    公开(公告)日：1967-04-26

    申请号：GB3766165

    申请日：1965-09-03

    Applicant: BASF AG

    Inventor： BILLE HEINZ ,  OLSEN BJOERN

    IPC: A41D27/06 ,  B32B27/00 ,  D06M15/59

    Abstract: Heat sealable stiffening materials comprising a backing cloth and a layer of a polymide bonded therewith as a stiffening agent, is prepared by moistening the backing cloth with water and/or an organic solvent, dusted with a powder of a synthetic linear thermoplastic polyamide at the rate of from 20 to 80 grams per square metre of the backing cloth and then calendering. Examples of polyamides are polycondensates of lactams or of diamines and dicarboxylic acids, for example, caprolactam, piperidone - 2, pyrrolidone - 2, hexamethylene-diamine, 4, 4\sv - diaminodicyclohexylmethane, 4, 4\sv - diamino - dicyclohexylpropane and adipic acid, particularly those of softening point from 120 DEG to 200 DEG C. Copolymers exemplified are 1 part by weight of caprolactam and 2 to 11 parts of an equimolar mixture of (a) about equal parts by weight of hexamethylene-diamine and 4, 4\sv - diaminodicyclohexylmethane and (b) adipic acid and copolymers obtained from 40% by weight of capryllactam, 25% of octamethylene diammonium adipate and 35% of hexamethylene diammonium adipate. The polyamide may be obtained by grinding, reprecipitation or water digestion and should have a grain size as uniform as possible between 10 and 250 microns. The backing cloth may be of cotton, staple fibre or linen and it may have a shrinkproof finish and an area weight of from 120-250 grams per square metre. Water, methanol, ethanol, isopropanol or mixtures thereof may be used to moisten the backing cloth, as well as organic solvents such as methylene chloride. The powder may be applied by means of a vibrating screen. Calendering which may be carried out at 20 DEG C - 110 DEG C may be effected immediately after drying or after storing at room or elevated temperature.

    Homogeneous polyamide plates
    9.
    发明专利
    Homogeneous polyamide plates 未知

    公开(公告)号：GB881273A

    公开(公告)日：1961-11-01

    申请号：GB331959

    申请日：1959-01-30

    Applicant: BASF AG

    Inventor： HOERNER HANS ,  OLSEN BJOERN

    IPC: B29C71/00 ,  B29D7/00 ,  B41N1/12 ,  C08J7/00 ,  C08J7/02 ,  G03C1/795 ,  G03F7/038 ,  G03F7/04

    Abstract: Stress-free homogeneous flat plates or films of polyamides are made by subjecting a flat plate or film made from a film-forming interpolyamide, obtained by polycondensation of at least two different compounds forming linear polyamides, to a treatment with a swelling agent and pressing the plate or film thus treated at a temperature between 40 DEG C. and the melting point of the polyamide without substantially affecting the dimensions of the plate or film. Specified compounds forming linear polyamides which may be used are the diamine salts of dicarboxylic acids, e.g. hexamethylenediamine adipate and diaminodicyclohexylmethane adipate, and the lactams of o -aminocarboxylic acids, e.g. e -caprolactam. The polyamides may also contain hetero atoms in the molecule, e.g. oxygen atoms, or include side chains, e.g. alkyl groups. Specified swelling agents include aliphatic and cycloaliphatic mono-, di and tri-hydroxy compounds with up to 10 carbon atoms, e.g. methanol, ethanol, propanol, ethylene glycol, 1,4-butanediol, glycerin, 1,3,4-butanetriol or p cyclohexanol, and water. Mixtures of these compounds may also be used, as may also polyethylene oxides with a polymer chain length of up to 100 carbon atoms, either by themselves or in admixture with liquid halogen-carbon compounds, e.g. carbon tetrachloride and tetrachloroethylene, or with liquid hydrocarbon halides, e.g. chloroform, ethylene chloride and trichloroethylene, or with liquid aromatic hydrocarbons, e.g. benzene, toluene and xylene. The flat polyamide plate or film subjected to the treatment may contain a photosensitizing agent, or alternatively plates or films may first be treated as described above and then further treated with a solution which contains a photo-sensitizing agent and which makes the polyamide receptive to the latter. If desired, plates or films may be treated with the swelling agent, and the partly dissolved surface of the plate stripped off before the plate is pressed.

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