Abstract: An object of the present invention is to provide a honeycomb structural body with a long service life, which can reduce a pressure loss to a low level upon collecting particulates and maintain the pressure loss at the low level for a long time even after regenerating processes. The honeycomb structural body includes a columnar porous ceramic block in which a large number of through holes are placed in parallel with one another in the length direction with a wall portion interposed therebetween.

Abstract: A honeycomb structural body includes a columnar honeycomb structural body having large-capacity through holes and small-capacity through holes extending in parallel in a length direction of the columnar structural body. The large-capacity through holes and the small-capacity through holes have a polygonal shape in a cross section perpendicular to the length direction, and the large-capacity through holes and the small-capacity through holes have R-chamfered corner portions or C-chamfered corner portions in the cross section perpendicular to the length direction.

Abstract: A honeycomb structured body includes a plurality of honeycomb members bonded together by a bonding material, including a plurality of first honeycomb members, each having a vertical cross-section that is orthogonal to an axis of the honeycomb structured body and rectangular, and a plurality of second honeycomb members each having a vertical cross-section that is orthogonal to the axis and irregular in shape; and a filing layer arranged between an outer coating layer, which defines an outer surface of the honeycomb structured body, and an outer surface of the filter peripheral portion formed by the plurality of second honeycomb members.

Abstract: A pillar-shaped honeycomb structural body includes a first end face and a second end face substantially parallel to each other; and a peripheral surface connecting the first end face and the second end face. The first end face and the second end face have similar peripheral shapes. A taper rate P satisfies 0<P? approximately 4%, the taper rate P being expressed by the formula (1), taper rate P(%)=(D1?D2)/(2L)×100, wherein the maximum width of the first end face is D1, the maximum width of the second end face is D2, and the distance between the first end face and the second end face is L.

Abstract: A honeycomb structural body includes a columnar honeycomb structural body having large-capacity through holes and small-capacity through holes extending in parallel in a length direction of the columnar structural body. The large-capacity through holes and the small-capacity through holes have a polygonal shape in a cross section perpendicular to the length direction, and the large-capacity through holes and the small-capacity through holes have R-chamfered corner portions or C-chamfered corner portions in the cross section perpendicular to the length direction.

Abstract: An object of the present invention is to provide a honeycomb structural body (filter) which has a low pressure loss upon collecting particulates, makes it possible to deposit a great amount of particulates and ashes, and is less likely to produce cracks.

Abstract: A honeycomb structure includes a first end face and a second end face substantially parallel to each other, a peripheral face interconnecting the first end face and the second end face, a ceramic block including plural through cells with partition walls inbetween, the cells extending from the first end face to the second end face, and a coating layer forming the peripheral face of the honeycomb structure. The thickness of the coating layer at the second end face is greater than at the first end face.

Abstract: The honeycomb structured body of the present invention is a pillar-shaped honeycomb structured body having a honeycomb structure that a number of through holes are placed in parallel with one another in the length direction with a wall portion interposed therebetween and one of ends of each through hole is sealed, wherein a relation between a volume Y (L) of said honeycomb structured body and an aperture ratio X (%) on an inlet side satisfies the following inequality (1): Y??1.1X+68.5 (wherein Y?19, 35?X?56)??(1).

Abstract: A honeycomb structured body of the present invention is a honeycomb structured body in which a plurality of porous ceramic members are combined with one another through an adhesive layer, each of the porous ceramic members having a plurality of cells which are allowed to penetrate in a longitudinal direction with a wall portion therebetween and either one end of which is sealed, with a catalyst supporting layer being adhered to said wall portion, wherein pores formed in said porous ceramic member are constituted by large pores having a relatively large pore diameter and small pores having a relatively small pore diameter, and supposing that: the thickness of the catalyst supporting layer is X1 (?m), and the value, obtained by multiplying the porosity (%) of said porous ceramic member by the ratio (the average pore diameter of said large pores/the average pore diameter of said small pores) of the average pore diameter of said large pores to the average pore diameter of said small pores, is Y1, these X1 and Y1

Abstract: An object of the present invention is to provide a honeycomb structural body which makes it possible to prevent a thermal stress from concentrating on plugs for sealing a group of inlet-side through holes and the vicinity thereof during a regenerating process, and consequently to prevent occurrence of cracks. The honeycomb structural body of the present invention is a pillar-shaped honeycomb structural body mainly made of porous ceramics, in which a plurality of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween. Herein, the through holes are constituted by a group of inlet-side through holes, whose ends are sealed by plugs at the outlet side such that the total sum of areas on cross sections perpendicular to the length direction is made relatively greater, and a group of outlet-side through holes, whose ends are sealed by plugs at the inlet side such that the total sum of areas on the cross sections thereof is made relatively smaller.

Abstract: A honeycomb structure including a ceramic block having two ends. The ceramic block is formed of a plurality of honeycomb units having cell walls, which define a plurality of cells that extend from one end to the other end. The honeycomb units are bonded together by interposing bonding layers therebetween. A coat layer is provided on an outer peripheral surface of the ceramic block. At least one heat absorbing material is provided to at least one part selected from among the cell walls, the coat layer, and the bonding layer.

Abstract: A honeycomb filter for purifying exhaust gases that can almost completely burn and remove particulates accumulated on a wall portion by a regenerating process allowing residual ashes on the wall portion to easily move inside a through hole because the ashes are easily separated from the wall portion.

Abstract: A pillar-shaped honeycomb structural body includes a first end face and a second end face substantially parallel to each other; and a peripheral surface connecting the first end face and the second end face. The first end face and the second end face have similar peripheral shapes. A taper rate P satisfies 0<P? approximately 4%, the taper rate P being expressed by the formula (1), taper rate P(%)=(D1?D2)/(2L)×100, wherein the maximum width of the first end face is D1, the maximum width of the second end face is D2, and the distance between the first end face and the second end face is L.

Abstract: A honeycomb structure includes a first end face and a second end face substantially parallel to each other, a peripheral face interconnecting the first end face and the second end face, a ceramic block including plural through cells with partition walls inbetween, the cells extending from the first end face to the second end face, and a coating layer forming the peripheral face of the honeycomb structure. The thickness of the coating layer at the second end face is greater than at the first end face.

Abstract: An object of the present invention is to provide a honeycomb structural body (filter) which has a low pressure loss upon collecting particulates, makes it possible to deposit a great amount of particulates and ashes, and is less likely to produce cracks.

Abstract: An object of the present invention is to provide a honeycomb structural body (filter) which has a low pressure loss upon collecting particulates, makes it possible to deposit a great amount of particulates and ashes, and is less likely to produce cracks.

Abstract: A honeycomb structured body includes: a plurality of honeycomb members bonded together by a bonding material, each honeycomb member including an outer wall, a partition arranged inward from the outer wall, and a plurality of cells partitioned by the partition for functioning as a flow passage for a fluid; an outer surface formed by an outer coating layer; a filter core portion including a plurality of first honeycomb members of the plurality of honeycomb members, each of the first honeycomb members having a vertical cross-section that is orthogonal to an axis of the honeycomb structured body and rectangular; a filter peripheral portion arranged outside the filter core portion and formed by a plurality of second honeycomb members of the plurality of honeycomb members, each of the second honeycomb members having a vertical cross-section that is orthogonal to the axis and irregular in shape; and a filling layer arranged between the outer coating layer and an outer surface of either one of the filter core portion

Abstract: A honeycomb structured body of the present invention is a honeycomb structured body in which a plurality of porous ceramic members are combined with one another through an adhesive layer, each of the porous ceramic members having a plurality of cells which are allowed to penetrate in a longitudinal direction with a wall portion therebetween and either one end of which is sealed, with a catalyst supporting layer being adhered to said wall portion, wherein pores formed in said porous ceramic member are constituted by large pores having a relatively large pore diameter and small pores having a relatively small pore diameter, and supposing that: the thickness of the catalyst supporting layer is X1 (?m), and the value, obtained by multiplying the porosity (%) of said porous ceramic member by the ratio (the average pore diameter of said large pores/the average pore diameter of said small pores) of the average pore diameter of said large pores to the average pore diameter of said small pores, is Y1, these X1 and Y1

Abstract: An object of the present invention is to provide a honeycomb structural body which makes it possible to prevent a thermal stress from concentrating on plugs for sealing a group of inlet-side through holes and the vicinity thereof during a regenerating process, and consequently to prevent occurrence of cracks. The honeycomb structural body of the present invention is a pillar-shaped honeycomb structural body mainly made of porous ceramics, in which a plurality of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween. Herein, the through holes are constituted by a group of inlet-side through holes, whose ends are sealed by plugs at the outlet side such that the total sum of areas on cross sections perpendicular to the length direction is made relatively greater, and a group of outlet-side through holes, whose ends are sealed by plugs at the inlet side such that the total sum of areas on the cross sections thereof is made relatively smaller.

Abstract: An object of the present invention is to provide a honeycomb structural body with a long service life, which can reduce a pressure loss to a low level upon collecting particulates and maintain the pressure loss at the low level for a long time even after regenerating processes. The honeycomb structural body includes a columnar porous ceramic block in which a large number of through holes are placed in parallel with one another in the length direction with a wall portion interposed therebetween.