摘要:
A seed beads dispersing disperse system is obtained by dispersing olefin resin seed beads 1 with a specific tubular shape in an aqueous medium. Then, the olefin resin seed beads 1 are impregnated with styrene monomers and the styrene monomers are polymerized in the presence of a polymerization initiator by heating at a temperature in a specified range, to thereby obtain tubular thermoplastic resin composite beads. Expandable thermoplastic resin composite beads obtained by impregnating the thermoplastic resin composite beads with a blowing agent, expanded thermoplastic resin composite beads obtained by foaming and expanding the expandable thermoplastic resin composite beads, and a foamed molded article formed from the expanded thermoplastic resin composite beads by molding are also obtained.
摘要:
A process of producing a foamed molding, wherein expanded, substantially non-crosslinked polypropylene-based resin beads are heated in a mold to fuse-bond the beads together into a unitary body. Each of the expanded beads has been surface-modified with an organic peroxide.
摘要:
A zoom lens lens-barrel is capable of stabilizing movement of a lens holding frame along an optical axis, ensuring retraction of the lens-barrel into the main body, and reducing the size of the zoom lens lens-barrel. A zoom lens lens-barrel which supports at least one of a plurality of lenses in a movable manner along an optical axis direction comprises a pair of first guide shafts provided parallel to an optical axis Z direction which support outer periphery of a first lens frame and a second lens frame and a pair of second guide shafts provided parallel to the optical axis Z direction and at a different phase position in the lens-barrel plane than the pair of first guide shafts, which support the outer periphery of a third lens frame, a fourth lens frame, and a fifth lens frame.
摘要:
Foamed and expanded beads including a polyester-based resin containing at least 35 mole % of an aliphatic ester component. The foamed beads have a gel fraction of at least 5 % by weight and comprises at least one gel accelerating agent selected from fatty acids having 12-25 carbon atoms, metal salts of the fatty acids, esters of the fatty acids and amides of the fatty acids in an amount of 0.15-3 % by weight. A foam molding is obtained by heating the foamed and expanded beads in a mold.
摘要:
A lens barrel includes a fixed lens tube of cylindrical shape and a plurality of operation parts of push type, wherein the plurality of operation parts are interconnected by a ring-shaped elastic member and are attached to the fixed lens tube. This structural arrangement of the lens barrel effectively simplifies assembly processes in the manufacture of lens barrels.
摘要:
Foamed and expanded beads of a crosslinked aliphatic polyester resin having a gel fraction of at least 5% by weight. The expanded beads may be obtained by crosslinking beads of a non-crosslinked aliphatic polyester resin with a crosslinking agent including an organic peroxide to obtain crosslinked resin beads having a gel fraction of at least 5% by weight, and then expanding the crosslinked resin beads. A biodegradable foamed article may be obtained by thermally foaming the crosslinked, expanded aliphatic polyester resin beads in a mold.
摘要:
Balls are clamped between a first gear driven by an auto-focusing motor and a second gear driven by a manual focusing ring. The balls are arranged to revolve about a given axis. A projection having an elasticity and provided to the second gear itself is brought into contact with a fixing member provided at a predetermined position, so that a clamping force for clamping the balls is generated by the projection.
摘要:
A first ball lace and a second ball lace, which is arranged at a position opposite to the first ball lace to sandwich a ball between itself and the first ball lace are coaxially assembled in a pencil shaped vibration driven motor or actuator, so that the second ball lace can be operated externally, and the rotational force of the ball can be output to an external device.
摘要:
Polylactic acid resin expanded beads exhibiting excellent fusion bonding at the time of in-mold molding have such a crystal structure that gives a first time DSC curve when heated according to heat flux differential scanning calorimetry referenced in JIS K7122(1987) and a second time DSC curve when thereafter cooled and then again heated, the second time DSC curve having a fusion peak having a reference peak temperature and the first time DSC curve having at least one fusion peak with a peak temperature higher than the reference peak temperature and another at least one fusion peak with a peak temperature not lower temperature than the reference peak temperature.
摘要:
Foamed polyolefin resin beads having antistatic properties obtained by a process, which includes dispersing polyolefin resin beads into an aqueous medium, injecting a blowing agent, stirring and allowing the polyolefin resin beads to foam and expand. The polyolefin resin beads are composite resin beads comprising a core layer of a core layer polyolefin resin and a covering layer of a covering layer polyolefin resin.