摘要:
Magnetic powder and substrate material are separately recovered from finely chopped wastes of magnetic recording media consisting of a polymeric substrate and a magnetic layer present thereon in which finely divided magnetic powder is dispersed in crosslinked or uncrosslinked polymeric binder by treating the finely chopped wastes of magnetic recording media in a solution consisting of the potassium salt of a polyunsaturated fatty acid, or a biodegradable cleaning agent comprising phosphates, surfactants and a complexing agent, and one or more organic solvents or water while being subjected to mechanical action, and separately removing the magnetic powder from the substrate material by washing or sedimentation or in a magnetic separator.
摘要:
A thermoplastic molding material based on polyethylene terephthalate contains preferably from 37 to 96% by weight of PET, from 1 to 20% by weight of a polymer material containing preferably polyurethane, and from about 4 to 30% by weight of a pigment-like reinforcing agent comprising metal and/or metal oxide. The molding materials are suitable for processing by injection molding, and the shaped articles produced therefrom have advantageous properties, in particular with regard to a higher density compared with a similar polybutylene terephthalate (PBT) having glass fibers as a filler.The thermoplastic molding material can advantageously be used for small parts and for housing parts for electronic equipment and data devices.
摘要:
Continuous recovery of raw materials from coated films and apparatus for this purpose and film material recovered therewith. Large amounts of coated films can be fed to a continuous recycling process in which any pigments present in the coating and the substrate material are recovered. The treatment is carried out at room temperature in an alkaline medium consisting of soft soap, organic solvent and/or water, with or without the use of a catalyst. The solvent is recycled. After the first treatment stage, the film shreds can be treated in a second stage with a solvent/water mixture similarly to the first stage, and thorough final washing in a water or solvent circulation is effected in a third stage. The recovered film shreds are dried, pressed, milled and brought to the desired shape in a plastics agglomerator, and the recovered pigments are dried under reduced pressure (FIG. 1). The process and apparatus can be used with advantage for any type of substrate or printed media, for example for magnetic substrates, photographic substrates, printing plates, pigment-free substrates.
摘要:
A pulsed laser is employed for quantitative spectral analysis of halogen-containing, nonmetallic or at most partially metallic materials in combination with an image recorder, a spectrometer and a CCD camera, by detecting, summing and analysing the luminous intensity of at least a volume slice from the expansion cone of the plasma, this making it possible, advantageously, for temperature and density gradients to be measured.
摘要:
A protective container is provided for substantially cuboidal objects which is in the form of a hollow cuboid case which is open on one side. A case part is provided for covering the open side, the case part is U-shaped or partially U-shaped in this position. A closure arrangement is provided which connects the hollow cuboid case and the case part reveals when the container is opened for the first time. This container is especially well-suited for use with cassettes of all types, as well as other substantially cuboidal articles.