摘要:
A disc molding die includes a stationary-side mirror block disposed on a stationary die, a movable-side mirror block disposed on a movable die and facing the stationary-side mirror block so as to define a cavity in combination with the stationary-side mirror block, and a cavity ring disposed on the radially outer side of one of the stationary-side mirror block and the movable-side mirror block so as to define the outer circumferential edge of each disc substrate. The portion of the cavity ring facing the cavity is roughened. When resin is charged into a cavity, very small spaces are formed between the resin and the inner circumferential surface of the cavity ring, due to the roughened portion of the cavity ring facing the cavity. Therefore, the release resistance during die opening or releasing can be decreased. As a result, it is possible to solve the conventional problem in which the disc substrate deforms, causing the angle of warp to vary at circumferential positions and increasing the amount of surface deflection. Therefore, the quality of the disc substrate can be increased. Further, since the release operation can be performed before a molded disc substrate sufficiently shrinks, tact time can be shortened.
摘要:
In a disc molding die, a stationary base plate is attached to a stationary platen, and a stationary mirror-surface plate is attached to the stationary base plate. Further, a movable base plate is attached to a movable platen, and a movable mirror-surface plate is attached to the movable base plate. A stationary guide ring is attached to the stationary base plate so as to surround the stationary mirror-surface plate, while a movable guide ring is attached to the movable base plate so as to surround the movable mirror-surface plate. When the die is clamped, the movable guide ring is brought into contact with the stationary guide ring. A cavity ring is detachably attached to one of the stationary and movable mirror-surface plates such that the cavity ring projects toward the other of the stationary and movable mirror-surface plates. An abutment position adjusting mechanism adjusts the abutment position where the movable guide ring abuts on the stationary guide ring, in accordance with the thickness of the cavity ring. This makes it possible to change the thickness of the cavity without replacing the mirror-surface plates.
摘要:
A board capable of capturing and decomposing both formaldehyde and acetaldehyde comprises a wood fiber board comprising a plant fiber of 30 wt % or more, and an aldehyde capturing agent comprising at least carbodihydrazide which is impregnated and solidified inside the side of the fiber board. In addition to the wood fiber board, a fiber board made of a mixture material of a resin fiber and a plant fiber combined. A carbodihydrazide is sprayed onto the fiber board in the form of water solution and optionally comprises a surfactant.
摘要:
A detecting float is normally made floating on a first liquid, and when a liquid to be detected having a specific gravity less than the first liquid is oncoming, the detecting float sinks relative to the new liquid level as compared with the position which it assumed relative to the level of the first liquid. When the layer of the liquid to be detected increases to a given thickness, the detecting float sinks by a given distance or amount to permit the ingress of the liquid to be detected into the float, which therefore becomes heavier and sinks further downward. An external float surrounds the detecting float, and is formed with a liquid port at a location slightly below the level of the first liquid for allowing the passage of the liquid which reaches the internally located detecting float, but intercepting the liquid to be detected which is in the form of an oil film. Detection means is provided in conjunction with the detecting float and the external float for producing a signal when the detecting float has sunk by a given distance relative to the external float upon ingress of the liquid to be detected.
摘要:
A wet process type hard fiberboard is provided that is environmentally-friendly by finding a reinforcing agent that does not result in environmental contamination as the agent takes the place of phenol resin having a significant effect on environmental contamination. This environmentally-friendly wet process type hard fiberboard uses acrylic resin and epoxy resin not containing bisphenol A as reinforcing agents in place of conventional phenol resin. Both reinforcing agents are thermosetting resins, hardly reacting at all at temperatures of 100° C. or lower, and reacting rapidly at temperatures above 140° C. which results in curing, while in terms of environmental protection, these reinforcing agents are optimally suited for use in wet process type hard fiber boards in which water is used by recycling numerous times, with any of the water used being hardly discharged to the outside.
摘要:
Disclosed herein is a camera lens comprising a thermoplastic composition comprising a poly(aliphatic ester)-polycarbonate copolymer comprising soft block ester units derived from an alpha, omega C6-20 aliphatic dicarboxylic acid or derivative thereof, a dihydroxyaromatic compound, and a carbonate source, wherein the thermoplastic composition has a melt volume rate of 13 to 25 cc/10 min at 250° C. and under a load of 1.2 Kg and a dwell time of 6 minutes, according to ASTM D1238-04, and wherein the camera lens has an effective lens area of 0.5 to 100 mm2. A method of making the camera lens, and a camera lens comprising a thermoplastic composition comprising a redistribution product of a poly(aliphatic ester)-polycarbonate, are also disclosed.
摘要:
A board capable of capturing and decomposing both formaldehyde and acetaldehyde comprises a wood fiber board comprising a plant fiber of 30 wt % or more, and an aldehyde capturing agent comprising at least carbodihydrazide which is impregnated and solidified inside the side of the fiber board. In addition to the wood fiber board, a fiber board made of a mixture material of a resin fiber and a plant fiber combined. A carbodihydrazide is sprayed onto the fiber board in the form of water solution and optionally comprises a surfactant.