Abstract:
Multilayer magnetic recording medium is suitable for high recording densities and the recording of digital data, has very good electromagnetic recording properties in the entire recording wavelength range and good mechanical properties and possesses a flat frequency response and which has at least one upper magnetic recording layer less than 0.5 &mgr;m thick and at least one lower layer which contains a magnetically soft pigment.
Abstract:
An anticopying film or layer consists of a film or of a layer of transparent material having a large number of completely or partially nontransparent regions which are arranged distances apart and whose planes are arranged in about the same predetermined position relative to the surfaces of the film or of the layer so that, from a predetermined viewing angle onto the surfaces of the anticopying film, the latter is essentially transparent. The regions consist at least partially of photosensitive material which is converted by the action of radiation into nontransparent or reflecting material, it also being possible to provide, in the transparent plastics material, furrows or grooves in which the photosensitive material is present.
Abstract:
Described are tape-type magnetic recording media (I) including a non-magnetic substrate (III), at least one film applied to the substrate and, in at least one of these films, an inorganic acicular pigment (II) suitable for use as a supporting pigment, the ratio of the mean length to the mean diameter of the pigment (II) being at least 3 and the mean modulus of elasticity of the films being not less than 15 GPa in the longitudinal direction of the tape-type recording medium (I).
Abstract:
Magnetic recording media are produced by dispersion of powdered magnetic material in a mixture of solvents, organic polymer binders, dispersants and further conventional additives in a stirred ball mill and subsequent aftertreatment in a ball mill containing grinding media, application of the resulting dispersion as a layer to a substrate and subsequent consolidation of the layer.
Abstract:
The present invention relates to a solid dosage form with at least one film (1), which contains an active substance at least in sections. The dosage form is characterized in that the concentration of active substance in film (1) or in the films has a gradient in a direction normal to the thickness of film (1). The invention further relates to a method of production of a solid dosage form with an active substance, in which at least one film (1) is produced, which contains an active substance at least in sections, with the concentration of active substance in film (1) or in the films having a gradient in the longitudinal direction of the film. This film is then formed to produce the dosage form.
Abstract:
The invention relates to cholesteric layered material having an improved color impression, to pigments prepared therefrom, and to a process for the production and use thereof.
Abstract:
A platelet-shaped cholesteric multilayer pigment which comprises the layer sequence A1/B/A2 where A1 and A2 are identical or different and each comprise at least one cholesteric layer, and B is at least one interlayer which separates the layers A1 and A2 from one another and which absorbs all or some of the light transmitted by the layers A1 and A2, processes for its preparation, and its use are all described.
Abstract translation:包含层序列A1 / B / A2其中A1和A2的片状胆甾型多层颜料是相同的或不同的,并且各自包含至少一个胆甾醇层,B是至少一层使层A1和A2彼此分离的中间层, 吸收由层A1和A2传输的全部或一些光,其制备方法及其用途均被描述。
Abstract:
Media I suitable for the thermal transfer of a layer containa) a substrate II,b) a layer III thereon, containing1) from 75 to 90% by weight of a polymer IV having a softening point of from 100 to 160.degree. C., and2) from 10 to 25% by weight of a polymer V having a softening point of at least 90.degree. C.andc) a layer VI containing a polymer VII.
Abstract:
The heat sealing film and a magnetic transfer strip contain an adhesive layer comprising thermoplastic, immiscible binder components. One component is spherical, amorphous and embedded in finely distributed form in a homogeneous layer of the other, highly crystalline components in such a way that the spherical component protrudes hemispherically from the layer. The spherical binder is a glassy solid up to at least 60.degree. C. and above 80.degree. C. is plastically deformable. The hemispheres protruding from the adhesive layer produce a uniform, fine roughness of the surface. Both heat sealing film and magnetic transfer strip are nonblocking up to at least 60.degree. C. and heat-sealable at temperatures greater than 80.degree. C. The adhesive layer imparts to a magnetic recording medium a uniform thickness of the adhesive joint and a permanent, temperature-resistant adhesive force.
Abstract:
An apparatus for checking deep-frozen food, which irreversibly indicates if an additional storage temperature has been exceeded, is described. A flat plastic bag having transparent walls, into which eutectic mixture having a liquid/solid phase transition in the range from 0.degree. to -50.degree. C. has been introduced, together with a magnetic dispersion consisting of finely divided magnetic pigments, has a heat-conducting connection to the material to be frozen. A magnetic stripe which contains a magnetically recorded pattern and which remains connected to the bag until the indicating apparatus together with the material to be frozen has been cooled below the limiting temperature is stuck to the bag. The magnetic stripe is then removed. If the permissible limiting temperature is exceeded, the optically or magnetically readable structure produced by the magnetic stripe in the indicator bag is eliminated, permitting easy checking of the deep-frozen food. The present invention permits many potential variations by combination of a plurality of applied magnetic stripes.