Abstract: A curable fluorine-based, elastomer comprising a curable fluorine-based elastomer, a carbon black, and anionic liquid; wherein the carbon black is contained in an amount not greater than 3 carts by. mass per 100 parts by mass of tile curable fluorine-based elastomer; and the ionic liquid is contained ¼ an amount not greater than 10 parts by mass per 100 parts by mass of the curable fluorine-elastomer.

Abstract: A combined YAG laser/arc welding apparatus performs a welding operation with a large depth of fusion and a deep fusion at a high efficiency. The welding apparatus includes an arc electrode which targets a point on a welded member where a laser beam from a YAG laser is focused. While an arc power supply is connected between the arc electrode and the welded member, the welded member is irradiated by the YAG laser to produce plasmoid gasses and metal vapors or a plume which is effective to start an arc from the arc electrode. A combined YAG laser/arc welding operation takes place while keeping the plume within and without a keyhole. Welded surface is covered by a hood, and a shielded gas passed through a commutation metal network surrounds the welded focus to prevent an oxidation and keeps the plume maintained. A filler wire is fed to a molten pool.

Abstract: A combined YAG laser/arc welding apparatus performs a welding operation with a large depth of fusion and a deep fusion at a high efficiency. The welding apparatus includes an arc electrode which targets a point on a member being welded where a laser beam from a YAG laser is focused. While an arc power supply is connected between the arc electrode and the member being welded, the member being welded is irradiated by the YAG laser to produce plasmoid gasses and metal vapors or a plume which is effective to start an arc from the arc electrode. A combined YAG laser/arc welding operation takes place while keeping the plume within and without a keyhole. Welded surface is covered by a hood, and a shielded gas passed through a commutation metal network surrounds the welded focus to prevent an oxidation and keeps the plume maintained. A filler wire is fed to a molten pool.

Abstract: A combined YAG laser/arc welding apparatus is disclosed which performs a welding operation with a large depth of fusion and a deep fusion at a high efficiency. The welding apparatus includes an arc electrode which targets a point on a welded member where a laser beam from a YAG laser is focused. While an arc power supply is connected between the arc electrode and the welded member, the welded member is irradiated by the YAG laser to produce plasmoid gasses and metal vapors or a plume which is effective to start an arc from the arc electrode. A combined YAG laser/arc welding operation takes place while keeping the plume within and without a keyhole. Welded surface is covered by a hood, and a shielded gas passed through a commutation metal network surrounds the welded focus to prevent an oxidation and keeps the plume maintained. A filler wire is fed to a molten pool.

Abstract: A twin spots pulse laser welding apparatus is disclosed which is used for providing a defect-free weld in a butt welding gap. The welding apparatus comprises a YAG laser oscillator 6, a chopper circuit for controlling the value of the lamp current of the oscillator, a chopping controller 12, a control panel 10 and a pulse generator 11 for applying a lamp current base value Wb and a peak value Wp and a pulsating pulse to the controller, and a twin spots laser head 14 for converging a laser beam delivered from the YAG laser oscillator to two foci 20R, 20L which are distributed in x direction with a very small spacing therebetween. YAG laser beam delivered from the YAG laser oscillator 6 is guided through an optical fiber cable 9 to the laser head.

Abstract: A combined YAG laser/arc welding apparatus is disclosed which performs a welding operation with a large depth of fusion and a deep fusion at a high efficiency. The welding apparatus includes an arc electrode which targets a point on a welded member where a laser beam from a YAG laser is focused. While an arc power supply is connected between the arc electrode and the welded member, the welded member is irradiated by the YAG laser to produce plasmoid gasses and metal vapors or a plume which is effective to start an arc from the arc electrode. A combined YAG laser/arc welding operation takes place while keeping the plume within and without a keyhole. Welded surface is covered by a hood, and a shielded gas passed through a commutation metal network surrounds the welded focus to prevent an oxidation and keeps the plume maintained. A filler wire is fed to a molten pool.

Abstract: A twin spots pulse laser welding apparatus is disclosed which is used for providing a defect-free weld in a butt welding gap. The welding apparatus comprises a YAG laser oscillator 6, a chopper circuit for controlling the value of the lamp current of the oscillator, a chopping controller 12, a control panel 10 and a pulse generator 11 for applying a lamp current base value Wb and a peak value Wp and a pulsating pulse to the controller, and a twin spots laser head 14 for converging a laser beam delivered from the YAG laser oscillator to two foci 20R, 20L which are distributed in x direction with a very small spacing therebetween. YAG laser beam delivered from the YAG laser oscillator 6 is guided through an optical fiber cable 9 to the laser head.

Abstract: A medical pressure-sensitive adhesive is provided, having a high steam permeability (at least 1100 g/(m.sup.2 .multidot.24 Hr) at a temperature of 37.degree. C. and an RH of 40%), and exhibiting such an appropriate adhesive strength as the dressing material coated with the pressure-sensitive adhesive is not easily peeled off and a wound is not inflicted on the skin when the dressing material is peeled from the skin, and also exhibiting durability of such an appropriate adhesive strength as well as an appropriate cohesive force. A medical pressure-sensitive adhesive, comprising a polymer containing above 50 wt % of a unit derived from an alkoxyalkyl acrylate, the Tg value of the homopolymer thereof being -35.degree. C. or less is also provided.

Abstract: A plurality of holders, each capable of holding a rod of raw material, and a single handler are equipped within a chamber which is adapted to be evacuated. An operator positions one of the holders at a location where it is opposite to a rotary shaft capable of driving the rod of raw material for rotation at a high speed. The operator then secures the rod held by the holder to the free end of the rotary shaft by handling the holder. A rod of raw material which has become consumed by granulation is separated from the rotary shaft by the handler which is operated by the operator. A fresh holder is then positioned at a location where it is opposite to the rotary shaft, and a rod of raw material which is held thereby is then secured to the rotary shaft.