Abstract: A resin fuel tank includes a fuel tank main body (19) in which a closed space for storing fuel is formed in its interior; a built-in part (24) that is disposed within the closed space and is fixed to a wall portion of the fuel tank main body by at least two mounting portions (46); connecting portions (32, 34) of the built-in part, which are separated from the wall portion and that connect the two mounting portions (46); and deformation absorbing portions (48A, 48B) of the built-in part which are elastically deformable, are upside-down U-shaped as seen in side view and are provided between the mounting portions (46) and the connecting portions (32, 34), one ends (68A, 68B) of the deformation absorbing portions being fixed to the connecting portions, and other ends (56A, 56B) of the deformation absorbing portions being separated from the connecting portions in a height direction.

Abstract: A resin fuel tank includes a fuel tank main body (19) in which a closed space for storing fuel is formed in its interior; a built-in part (24) that is disposed within the closed space and is fixed to a wall portion of the fuel tank main body by at least two mounting portions (46); connecting portions (32, 34) of the built-in part, which are separated from the wall portion and that connect el the two mounting portions (46); and deformation absorbing portions (48A, 48B) of the built-in part which are elastically deformable, en.) are upside-down U-shaped as seen in side view and are provided between the mounting portions (46) and the connecting portions (32, 34), one ends (68A, 68B) of the deformation absorbing portions being fixed to the connecting portions, and other ends (56A, 56B) of the deformation absorbing portions being separated from the connecting portions in a height direction.

Abstract: [Problem to be solved] There is provided a process for producing an olefin polymer that is capable of producing an olefin polymer having high heat resistance and high molecular weight with excellent catalytic activity. Solution to problem The process for producing an olefin polymer includes a step of polymerizing at least one olefin selected from ethylene and ?-olefins having 4 to 30 carbon atoms in the presence of an olefin polymerization catalyst containing a transition metal compound represented by the general formula [I], the olefin polymer including constituent units derived from ethylene and ?-olefins having 4 to 30 carbon atoms in a total amount between more than 50 mol % and not more than 100 mol %, [in the formula [I], R1, R3 and R5 to R16 are each independently a hydrogen atom, a hydrocarbon group or the like; R2 is a hydrocarbon group or the like; R4 is a hydrogen atom; M is a transition metal of Group IV; Q is a halogen atom or the like; and j is an integer of 1 to 4].

Abstract: There is provided a process for producing an olefin polymer that is capable of producing an olefin polymer having high heat resistance and high molecular weight with excellent catalytic activity. The process for producing an olefin polymer includes a step of polymerizing at least one olefin selected from ethylene and ?-olefins having 4 to 30 carbon atoms in the presence of an olefin polymerization catalyst containing a transition metal compound represented by the general formula [I], the olefin polymer including constituent units derived from ethylene and ?-olefins having 4 to 30 carbon atoms in a total amount between more than 50 mol % and not more than 100 mol %, [in the formula [I], R1, R3 and R5 to R16 are each independently a hydrogen atom, a hydrocarbon group or the like; R2 is a hydrocarbon group or the like; R4 is a hydrogen atom; M is a transition metal of Group IV; Q is a halogen atom or the like; and j is an integer of 1 to 4].

Abstract: [Problem to be solved] There is provided a process for producing an olefin polymer that is capable of producing an olefin polymer having high heat resistance and high molecular weight with excellent catalytic activity. [Solution to problem] The process for producing an olefin polymer includes a step of polymerizing at least one olefin selected from ethylene and ?-olefins having 4 to 30 carbon atoms in the presence of an olefin polymerization catalyst containing a transition metal compound represented by the general formula [I], the olefin polymer including constituent units derived from ethylene and ?-olefins having 4 to 30 carbon atoms in a total amount between more than 50 mol % and not more than 100 mol %, [in the formula [I], R1, R3 and R5 to R16 are each independently a hydrogen atom, a hydrocarbon group or the like; R2 is a hydrocarbon group or the like; R4 is a hydrogen atom; M is a transition metal of Group IV; Q is a halogen atom or the like; and j is an integer of 1 to 4].

Abstract: The invention provides transition metal complex compounds, high-activity olefin oligomerization catalysts containing the compounds, and olefin oligomerization processes using the catalysts. A transition metal complex compound [A] according to the invention is represented by Formula (I) or Formula (I?) below. An olefin oligomerization catalyst includes the transition metal complex compound [A]. In an olefin oligomerization process of the invention, an olefin is oligomerized in the presence of the catalyst.

Abstract: The invention provides transition metal complex compounds, high-activity olefin oligomerization catalysts containing the compounds, and olefin oligomerization processes using the catalysts. A transition metal complex compound [A] according to the invention is represented by Formula (I) or Formula (I?) below. An olefin oligomerization catalyst includes the transition metal complex compound [A]. In an olefin oligomerization process of the invention, an olefin is oligomerized in the presence of the catalyst.

Abstract: There is provided an inlet pipe structure which does not require a liquid-level monitoring device or the like. A fuel tank (10) is formed by a main tank (12) and a sub-tank (14). A branch body (28) is connected to a fueling port (26) and an end (24A) of a fueling gun (24) can be selectively inserted into branch openings (32, 33) of the branch body (28). A connecting portion (34A) of the sub-breather tube (34) is fixed inclining toward the main tank (12) to a main tank inlet pipe (16) connected to a branch opening (32) of the branch body (28) at a position near an end portion (16B) of the main tank inlet pipe (16). Further, a connecting portion (36A) of a main breather tube (36) is fixed inclining toward the sub-tank (14) to a sub-tank inlet pipe (20) connected to a branch opening (33) of the branch body (28) at a position near an end portion (20B) of the sub-tank inlet pipe (20).