摘要:
The invention provides a novel means for solving and overcoming the problems in the magnetic recording tapes caused by the accumulation of static electricity during travelling of the tape affecting the quality of the reproduced sounds and picture images by playing the tape. The inventive method comprises providing at least one surface of the plastic-made film base with a layer of a plasma-polymerized gaseous compound of a specific type by exposing the surface of the film base to the atmosphere of low temperature plasma generated in the low pressure atmosphere of the gas or vapor of a compound such as an amine, organosilane, aliphatically unsaturated compound and aromatic compound, preferably, before coating the film base with a magnetic coating composition. The plasma-polymerized layer is effective to decrease the surface resistivity of the film base and to reduce the accumulation of static electricity induced by rubbing.
摘要:
The invention provides a shaped article of a fluorine-containing synthetic resin having improved surface properties such as increased wettability with water, printability, susceptibility to adhesive bonding and less accumulation of static electricity. The improved shaped article is obtained by subjecting the surface of the article to exposure to low temperature plasma generated in a low pressure atmosphere of a nitrogen-containing gaseous organic compound such as amines, imides and amides.
摘要:
The invention provides a novel method for modifying the surface properties, e.g. antistatic performance and anti-wearing resistance, of a disc-like shaped article made of a vinyl chloride-based resin such as a gramophone record by treating with low temperature plasma so as that the surface of the record is rendered antistatic and the noise generation in playing of the record is remarkably decreased. Different from conventional methods, a great uniformity of the effect by the plasma treatment is ensured by the inventive method all over the surface of the record since the record is transferred through the space between two parallel arrays of electrodes, preferably, with rotation around its axis during the plasma treatment. The manner of connecting the electrodes to the terminals of the high frequency generator may be in two different ways. For example, all of the electrodes in one array are connected to the grounded terminal while all of the electrodes in the other array are connected to the power-input terminal. Alternatively, each of the electrodes is connected to a terminal different from that to which both of the neighboring electrodes in the same array and the electrode in the other array oppositely facing it are connected. The record after the plasma treatment is preferably coated with a surface active agent and dried to enhance the effectiveness.
摘要:
A novel method is proposed for improving the surface properties or, in particular, for increasing the affinity to water of the surface of a shaped article made of a silicone, e.g. a silicone rubber. The inventive method comprises first exposing the surface of the shaped article of the silicone to low temperature plasma of an inorganic gas and then bringing the plasma-treated surface into contact with a liquid inert to the silicone which is an aqueous solution containing a surface active agent. The treated surface retains sufficient affinity to water even 6 months after the treatment.
摘要:
The undesirable phenomenon of bleeding of, for example, a plasticizer contained in a shaped article of a plasticized polyvinyl chloride resin on the surface of the article in a long-run use is effectively prevented by the inventive method and the effectiveness of the method is durable over a long period of time even when the article is used in an outdoor environment or under irradiation with ultraviolet light. The method of the invention comprises the first step of exposing the surface of the article to an atmosphere of low temperature plasma of an inorganic gas and then the second step of contacting the thus plasma-treated surface with a halogen or hydrogen halide, preferably, in gaseous state.
摘要:
A method for reducing static electricity on the surface of a shaped article made of polyvinyl chloride resins, which method comprises the steps of (a) blending a surface active agent with the polyvinyl chloride resin prior to fabrication of the resin into a shaped article, (b) fabricating the resin admixed with the surface active agent into a shaped article, and (c) subjecting the shaped article to a treatment with low temperature plasma of a gas.
摘要:
A novel method is proposed for improving the surface properties or, in particular, for increasing the affinity to water of and for reducing accumulation of static electricity on the surface of a shaped article made of an acrylic resin. The inventive method comprises first exposing the surface of the shaped article to low temperature plasma of a gas having no polymerizability in plasma and then bringing the plasma-treated surface into contact with an aqueous solution containing a surface active agent. The effect of the inventive method is so strong and durable that the treated surface remains antistatic even 6 months after the treatment.
摘要:
A method for preventing bleeding of plasticizers on the surface of shaped articles of plasticized polyvinyl chloride resins. The method comprises the steps of (a) blending a urethane elastomer with the polyvinyl chloride resin together with the plasticizer and other optional additives prior to fabrication of the polyvinyl chloride resin composition into shaped articles, (b) fabricating the resin composition into desired shaped articles, and (c) subjecting the thus shaped article to a treatment with low temperature plasma of a gas. Carbon monoxide is preferred as the gas for the plasma atmosphere.
摘要:
In the inventive method, shaped articles of a plasticized polyvinyl chloride resin are subjected to the surface treatment by with low temperature plasma so that the undesirable phenomenon of bleeding of the plasticizer on the surface can be effectively prevented when the plasticizer for plasticizing the resin is a compound having at least one aromatic nucleus in a molecule or a combination of two or more of plasticizers including 10% by weight or more of a plasticizer which is a compound having at least one aromatic nucleus in a molecule.
摘要:
The invention provides a very efficient method for the improvement of the antistatic performance, e.g. decrease in the accumulation of static electricity on the surface and decrease in the surface resistivity, of a synthetic resin shaped article with outstanding durability of the effect. The method comprises two steps in principle, first of which is the formation of a crosslinked layer in the surface portion of the shaped article by a variety of known methods effective for the formation of crosslinks in polymeric materials and the second of which is the exposure of the thus crosslinked surface of the article to low temperature plasma produced in an atmosphere containing a gaseous silicon-containing compound which may be a silane compound or a low-molecular weight vaporizable siloxane compound to form a plasma-polymerized surface film of the silicon compound on the crosslinked layer.