The Experts below are selected from a list of 2709 Experts worldwide ranked by ideXlab platform

Mitsuaki Hirota - One of the best experts on this subject based on the ideXlab platform.

  • observation of filler packing structure in narrow channels of thermosetting Plastics Molding compound
    Journal of The Society of Powder Technology Japan, 2003
    Co-Authors: Tatsumi Kawaguchi, Michitaka Suzuki, Mitsuaki Hirota
    Abstract:

    Flowability of thermosetting Plastics Molding compound is determined mainly by the filler particle packing structure in a narrow channel. The filler packing structure in narrow channels was observed using Scanning Electron Microscope and transmitted X-ray image. For a narrow channel, the coarse particles blocked up the channel gate without fine particles among the coarse ones, and some resin flew through the openings among the filler particles trapped at the channel gate. In a middle thickness channel, fine particles filled the space among coarse ones and the high packing fraction was achieved, and almost no resin flew through the channel.

  • effect of particle size distribution of filler in thermosetting Plastics Molding compound on the flowability
    Journal of The Society of Powder Technology Japan, 2002
    Co-Authors: Tatsumi Kawaguchi, Michitaka Suzuki, Mitsuaki Hirota
    Abstract:

    The effect of the particle size distribution of filler on the flowability of thermosetting Plastics Molding compounds in narrow channels is investigated. The flowability of compounds is evaluated by the flow length of slit flow tests. Our experimental results showed that the relation between the slit flow and the thickness of channel is divided into 3 regions according to the channel thickness. In the region of small channel thickness, the slit flow length increases with the channel thickness. In the intermediate region of channel thickness, the slit flow length remains nearly constant regardless of the channel thickness. In the region of large channel thickness, the slit flow length again increases with the channel thickness. The boundaries of these regions are given by the filler size, i. e., at 5-10% and 70-80% of the cumulative undersize distribution of the filler. The slit flow length is expressed by the product of the 10% diameter of particle size distribution, the frequency of coarse particles larger than the channel thickness, and the packing fraction of filler.

Tatsumi Kawaguchi - One of the best experts on this subject based on the ideXlab platform.

  • observation of filler packing structure in narrow channels of thermosetting Plastics Molding compound
    Journal of The Society of Powder Technology Japan, 2003
    Co-Authors: Tatsumi Kawaguchi, Michitaka Suzuki, Mitsuaki Hirota
    Abstract:

    Flowability of thermosetting Plastics Molding compound is determined mainly by the filler particle packing structure in a narrow channel. The filler packing structure in narrow channels was observed using Scanning Electron Microscope and transmitted X-ray image. For a narrow channel, the coarse particles blocked up the channel gate without fine particles among the coarse ones, and some resin flew through the openings among the filler particles trapped at the channel gate. In a middle thickness channel, fine particles filled the space among coarse ones and the high packing fraction was achieved, and almost no resin flew through the channel.

  • effect of particle size distribution of filler in thermosetting Plastics Molding compound on the flowability
    Journal of The Society of Powder Technology Japan, 2002
    Co-Authors: Tatsumi Kawaguchi, Michitaka Suzuki, Mitsuaki Hirota
    Abstract:

    The effect of the particle size distribution of filler on the flowability of thermosetting Plastics Molding compounds in narrow channels is investigated. The flowability of compounds is evaluated by the flow length of slit flow tests. Our experimental results showed that the relation between the slit flow and the thickness of channel is divided into 3 regions according to the channel thickness. In the region of small channel thickness, the slit flow length increases with the channel thickness. In the intermediate region of channel thickness, the slit flow length remains nearly constant regardless of the channel thickness. In the region of large channel thickness, the slit flow length again increases with the channel thickness. The boundaries of these regions are given by the filler size, i. e., at 5-10% and 70-80% of the cumulative undersize distribution of the filler. The slit flow length is expressed by the product of the 10% diameter of particle size distribution, the frequency of coarse particles larger than the channel thickness, and the packing fraction of filler.

Michitaka Suzuki - One of the best experts on this subject based on the ideXlab platform.

  • observation of filler packing structure in narrow channels of thermosetting Plastics Molding compound
    Journal of The Society of Powder Technology Japan, 2003
    Co-Authors: Tatsumi Kawaguchi, Michitaka Suzuki, Mitsuaki Hirota
    Abstract:

    Flowability of thermosetting Plastics Molding compound is determined mainly by the filler particle packing structure in a narrow channel. The filler packing structure in narrow channels was observed using Scanning Electron Microscope and transmitted X-ray image. For a narrow channel, the coarse particles blocked up the channel gate without fine particles among the coarse ones, and some resin flew through the openings among the filler particles trapped at the channel gate. In a middle thickness channel, fine particles filled the space among coarse ones and the high packing fraction was achieved, and almost no resin flew through the channel.

  • effect of particle size distribution of filler in thermosetting Plastics Molding compound on the flowability
    Journal of The Society of Powder Technology Japan, 2002
    Co-Authors: Tatsumi Kawaguchi, Michitaka Suzuki, Mitsuaki Hirota
    Abstract:

    The effect of the particle size distribution of filler on the flowability of thermosetting Plastics Molding compounds in narrow channels is investigated. The flowability of compounds is evaluated by the flow length of slit flow tests. Our experimental results showed that the relation between the slit flow and the thickness of channel is divided into 3 regions according to the channel thickness. In the region of small channel thickness, the slit flow length increases with the channel thickness. In the intermediate region of channel thickness, the slit flow length remains nearly constant regardless of the channel thickness. In the region of large channel thickness, the slit flow length again increases with the channel thickness. The boundaries of these regions are given by the filler size, i. e., at 5-10% and 70-80% of the cumulative undersize distribution of the filler. The slit flow length is expressed by the product of the 10% diameter of particle size distribution, the frequency of coarse particles larger than the channel thickness, and the packing fraction of filler.

Emil Wolf - One of the best experts on this subject based on the ideXlab platform.

  • effect of edge rounding and sloping of sidewalls on the readout signal of the information pits on optical disks
    Optical Engineering, 2003
    Co-Authors: Hungte Lee, Emil Wolf
    Abstract:

    The height profile of information pits (or bumps) on the data surface of an optical disk is assumed in most publications to be either rectangular or trapezoidal. Currently, when bumps or pits on an optical disk are produced by using a photoresist technique, their height profile is inevitably "rounded." Moreover, in Plastics Molding practice, edge rounding and sloping sidewalls of pits are advantageous factors to avoid the sharp edge becoming damaged when the replica is removed from the mold. A new expression for the height profile of pits is obtained that provides a convenient description of the geometry of the pits with different degrees of edge rounding and sloping of sidewalls. We find that λ/4-deep pits are optimum for the readout signal only when the pits have rectangular profile and are illuminated by a focused uniform beam. The optimum pit depth increases to an even greater value when edge rounding and sloping of sidewalls are taken into account.

Hungte Lee - One of the best experts on this subject based on the ideXlab platform.

  • effect of edge rounding and sloping of sidewalls on the readout signal of the information pits on optical disks
    Optical Engineering, 2003
    Co-Authors: Hungte Lee, Emil Wolf
    Abstract:

    The height profile of information pits (or bumps) on the data surface of an optical disk is assumed in most publications to be either rectangular or trapezoidal. Currently, when bumps or pits on an optical disk are produced by using a photoresist technique, their height profile is inevitably "rounded." Moreover, in Plastics Molding practice, edge rounding and sloping sidewalls of pits are advantageous factors to avoid the sharp edge becoming damaged when the replica is removed from the mold. A new expression for the height profile of pits is obtained that provides a convenient description of the geometry of the pits with different degrees of edge rounding and sloping of sidewalls. We find that λ/4-deep pits are optimum for the readout signal only when the pits have rectangular profile and are illuminated by a focused uniform beam. The optimum pit depth increases to an even greater value when edge rounding and sloping of sidewalls are taken into account.