Abstract: An electrospinning device includes: a plurality of nozzles that discharge a spinning solution containing a resin; and a plurality of power sources for applying charge to the solution. The power sources are connected such that different charges are applied to the solutions discharged from the nozzles, respectively. The fiber sheet is a long fiber nonwoven fabric including first fibers and second fibers that are different from the first fibers. In a histogram based on fiber diameter distributions and frequencies of the numbers of fibers, the fiber sheet has a peak where a ratio P1 of a frequency of the number of fibers of the first fibers to a frequency of the number of fibers of the second fibers is 0.01 or more and 100 or less.

Abstract: A method for manufacturing a microprojection unit (10) according to the invention involves: a microprojection tool forming step of forming a microprojection tool (1) by bringing a projecting mold part (11) into contact from one surface (2D) side of a base sheet (2A) including a thermoplastic resin, and thus forming a protrusion (3) that protrudes from another surface (2U) side, and withdrawing the projecting mold part (11) from the interior of the protrusion (3); a joining step of joining the one surface (2D) side of the base sheet (2A), in which the microprojection tool (1) has been formed, and a tip end of a base component (4); and a cutting step of cutting the base sheet (2A), to which the base component (4) has been joined, along a contour (4L) of the base component (4) at a position more inward than the base component's contour (4L) in a planar view of the base sheet (2A) as viewed from the microprojection tool (1) side, to manufacture a microprojection unit (10).

Abstract: A method for manufacturing a hollow protruding implement (1) including a fine hollow protrusion (3) having an opening (3h) of the present invention includes a protrusion forming step of inserting a projecting mold part (11) into a base material sheet (2A) from one face (2D) side thereof, the base material sheet containing a thermoplastic resin, thereby forming a non-penetrated hollow protrusion (3) projecting from another face (2U) side of the base material sheet (2A). Subsequently, an opening forming step is performed in which an opening (3h) that penetrates the hollow protrusion (3) is formed by using a contactless opening forming means disposed on the other face (2U) side of the base material sheet (2A).

Abstract: The present invention provides a fine hollow protruding tool (1) having a basal member (2) and a fine hollow protrusions (3) project from the basal member (2). The fine hollow protrusions (3) each has an opening portion (3h) on a tip side thereof and an interior in which an interior space linked to the opening portion (3h) is formed. In any vertical cross-section passing through an apex of the fine hollow protrusion (3), a wall thickness (T1) in an apex-side region (TB) on the apex side is thinner than a wall thickness (T2) in a lower-side region (BP) that is closer to the basal member (2) than the apex-side region (TB) is, and a gap (M1c) between inner walls (31) in the apex-side region (TB) is smaller than a gap (M2c) between the inner walls (31) in the lower-side region (BP). A base portion (34) of the fine hollow protrusion (3) projecting from the basal member (2) has a curvature.

Abstract: Method for manufacturing fine hollow protruding tool by: bringing a projecting mold part with a heating means into contact from one surface side of a base sheet including a thermoplastic resin, and, while heat-softening the contact section, inserting the projecting mold part into the base sheet, to form a protrusion protruding from the other surface side; and, after a cooling step, withdrawing the projecting mold part from the interior of the protrusion, forming the fine hollow protruding tool. In the protrusion forming step, the protrusion is formed by using a first warp-suppressing means that suppresses warping of the base sheet when the projecting mold part is inserted into the base sheet. In the release step, the fine hollow protruding tool is formed by using a second warp-suppressing means that suppresses warping of the base sheet when the projecting mold part is withdrawn from the interior of the protrusion.

Abstract: A microprotrusion device (1A) according to the present invention includes a needle-like and hollow first protrusion portion (3) that is formed so as to protrude from one surface (2a) of a substrate sheet (2) and a hollow second protrusion portion (4) that is formed so as to protrude from a vicinity of the first protrusion portion (3) on the one surface (2a) of the substrate sheet (2) and has a protrusion height lower than that of the first protrusion portion (3). The first protrusion portion (3) has an opening at its tip end portion, and a hollow portion (30) of the first protrusion portion (3) is in communication with the outside via the opening portion (31). The opening portion (31) is formed at the tip end of the first protrusion portion (3).

Abstract: The present invention provides a fine hollow protruding tool (1) having a basal member (2) and a fine hollow protrusions (3) project from the basal member (2). The fine hollow protrusions (3) each has an opening portion (3h) on a tip side thereof and an interior in which an interior space linked to the opening portion (3h) is formed. In any vertical cross-section passing through an apex of the fine hollow protrusion (3), a wall thickness (T1) in an apex-side region (TB) on the apex side is thinner than a wall thickness (T2) in a lower-side region (BP) that is closer to the basal member (2) than the apex-side region (TB) is, and a gap (M1c) between inner walls (31) in the apex-side region (TB) is smaller than a gap (M2c) between the inner walls (31) in the lower-side region (BP). A base portion (34) of the fine hollow protrusion (3) projecting from the basal member (2) has a curvature.

Abstract: A method for manufacturing a hollow protruding implement (1) including a fine hollow protrusion (3) having an opening (3h) of the present invention includes a protrusion forming step of inserting a projecting mold part (11) into a base material sheet (2A) from one face (2D) side thereof, the base material sheet containing a thermoplastic resin, thereby forming a non-penetrated hollow protrusion (3) projecting from another face (2U) side of the base material sheet (2A). Subsequently, an opening forming step is performed in which an opening (3h) that penetrates the hollow protrusion (3) is formed by using a contactless opening forming means disposed on the other face (2U) side of the base material sheet (2A).

Abstract: A method for manufacturing a microprojection unit (10) according to the invention involves: a microprojection tool forming step of forming a microprojection tool (1) by bringing a projecting mold part (11) into contact from one surface (2D) side of a base sheet (2A) including a thermoplastic resin, and thus forming a protrusion (3) that protrudes from another surface (2U) side, and withdrawing the projecting mold part (11) from the interior of the protrusion (3); a joining step of joining the one surface (2D) side of the base sheet (2A), in which the microprojection tool (1) has been formed, and a tip end of a base component (4); and a cutting step of cutting the base sheet (2A), to which the base component (4) has been joined, along a contour (4L) of the base component (4) at a position more inward than the base component's contour (4L) in a planar view of the base sheet (2A) as viewed from the microprojection tool (1) side, to manufacture a microprojection unit (10).

Abstract: A method for manufacturing a fine hollow protruding article (1) according to the invention involves: a protrusion forming step of bringing a projecting mold part (11) that includes a heating means into contact from one surface (2D) side of a base sheet (2) including a thermoplastic resin, and, while softening, with heat, a contact section (TP) in the base sheet (2) where the projecting mold part (11) contacts the base sheet (2), inserting the projecting mold part (11) into the base sheet (2), to form a protrusion (3) that protrudes from the other surface (2U) side of the base sheet (2); a cooling step of cooling the protrusion (3) in a state where the projecting mold part (11) is inserted in an interior of the protrusion (3); and a release step of withdrawing the projecting mold part (11) from the interior of the protrusion (3) after the cooling step, to form the fine hollow protruding article (1).

Abstract: A method for manufacturing a fine hollow protruding tool (1) having an opening portion (3h) of the present invention includes: a protrusion forming step of contacting a protrusion-forming projecting mold part (11A) including a heating means with first face (2D) of a base material sheet (2A), and inserting the protrusion-forming projecting mold part (11A) while softening, by heat, a contact point (TP) to form a fine hollow protrusion (3) which projects from the second face (2U) and which does not penetrate the projecting base material sheet (2A); a cooling step of cooling of cooling the fine hollow protrusion (3) in a state where the protrusion-forming projecting mold part (11A) is inserted therein; a release step of, after the cooling step, withdrawing the protrusion-forming projecting mold part (11A) to form a fine hollow protrusion (3) having a hollow interior; and an opening portion forming step of forming an opening portion (3h) which penetrates an interior portion of the fine hollow protrusion (3), at a

Abstract: This method for manufacturing a fine hollow protruding tool (1) involves: a protrusion forming step of bringing a projecting mold part (11) that includes a heating means into contact from one surface (2D) side of a base sheet (2A) including a thermoplastic resin, and, while softening the contact section (TP) with heat, inserting the projecting mold part (11) into the base sheet (2A), to form a protrusion (3) that protrudes from the other surface (2U) side; and a release step, after a cooling step, of withdrawing the projecting mold part (11) from the interior of the protrusion (3), to form the fine hollow protruding tool (1). In the protrusion forming step, the protrusion (3) is formed by using a first warp-suppressing means that suppresses warping of the base sheet (2A) when the projecting mold part (11) is inserted into the base sheet (2A).

Abstract: A microprotrusion device (1A) according to the present invention includes a needle-like and hollow first protrusion portion (3) that is formed so as to protrude from one surface (2a) of a substrate sheet (2) and a hollow second protrusion portion (4) that is formed so as to protrude from a vicinity of the first protrusion portion (3) on the one surface (2a) of the substrate sheet (2) and has a protrusion height lower than that of the first protrusion portion (3). The first protrusion portion (3) has an opening at its tip end portion, and a hollow portion (30) of the first protrusion portion (3) is in communication with the outside via the opening portion (31). The opening portion (31) is formed at the tip end of the first protrusion portion (3).

Abstract: A method for manufacturing a fine hollow protruding article (1) according to the invention involves: a protrusion forming step of bringing a projecting mold part (11) that includes a heating means into contact from one surface (2D) side of a base sheet (2) including a thermoplastic resin, and, while softening, with heat, a contact section (TP) in the base sheet (2) where the projecting mold part (11) contacts the base sheet (2), inserting the projecting mold part (11) into the base sheet (2), to form a protrusion (3) that protrudes from the other surface (2U) side of the base sheet (2); a cooling step of cooling the protrusion (3) in a state where the projecting mold part (11) is inserted in an interior of the protrusion (3); and a release step of withdrawing the projecting mold part (11) from the interior of the protrusion (3) after the cooling step, to form the fine hollow protruding article (1).