Molding hook and loop fastener
Provided is a molding hook and loop fastener, in which a barrier erected near left and right side edges of a substrate includes at least two rows of vertical wall arrays, and the vertical wall array includes a plurality of vertical walls disposed alternately. Between the two adjacent, rows of the vertical walls disposed alternately, each of the vertical walls disposed on one row is connected to two vertical walls disposed on the other row via a connecting part, and the connecting part connects one end portion of one vertical wall disposed on the adjacent row and the other end portion of the other vertical wall. Due to this, in the molding hook and loop fastener an outer side and an inner side of the barrier can be divided by the vertical wall array and the connecting part, and flexibility of the molding hook and loop fastener can be improved.
1. A molding hook and loop fastener including:
a planar substrate made from a thermoplastic resin and including a first surface and a second surface opposite to the first surface;
barriers erected on the first surface near left and right side edges along a length direction of the substrate; and
a plurality of engaging elements disposed between the left and right barriers, in which
each of the left and right barriers includes at least two rows of vertical wall arrays,
the vertical wall array of each row includes a plurality of vertical walls that are disposed intermittently in the length direction and are alternately disposed between an adjacent vertical wall array, and
the molding hook and loop fastener is molded integrally with a foam body at the same time as molding of the foam body, wherein:
between two adjacent rows of vertical walls disposed alternately, each of the vertical walls disposed on one row is connected to two vertical walls disposed on the other row via connecting parts, and
the connecting parts connect one end portion in the length direction of the vertical wall disposed on one of the adjacent rows and the other end portion in the length direction of the vertical wall disposed on the other row only, and
the respective connecting parts are disposed separately and independently in the length direction of the substrate.
2. The molding hook and loop fastener according to claim 1 , wherein the connecting part is configured to connect one end portion in the length direction of the vertical wall disposed on one of the adjacent rows and the other end portion in the length direction of the vertical wall disposed on the other row at such a position that the vertical walls are closest to each other.
3. The molding hook and loop fastener according to claim 1 , wherein the connecting part has the same height dimension as a height dimension of the vertical wall from the substrate.
4. The molding hook and loop fastener according to claim 1 , wherein each vertical wall includes a post portion erected from the substrate and a upper surface portion disposed at an upper end of the post portion so as to protrude in the length direction and a width direction of the substrate more than the upper end of the post portion.
5. The molding hook and loop fastener according to claim 4 , wherein a dimension in the length direction of a boundary portion between the post portion and the upper surface portion of the vertical wall in the vertical wall array of each row is set to be the same as a dimension in the length direction of a gap between the boundary portions of the two vertical walls disposed adjacently in the vertical wall arrays of the adjacent rows or is set to be smaller than the dimension in the length direction of the gap.
6. The molding hook and loop fastener according to claim 1 , wherein:
the engaging elements are disposed at a predetermined mounting pitch in the length direction of the substrate, and
a mounting pitch of the vertical walls disposed in the vertical wall array of each row is set to be equal to or smaller than ½ of the mounting pitch of the engaging elements.
7. The molding hook and loop fastener according to claim 1 , wherein the sum of areas of the upper surfaces of all of the vertical walls included in the barrier is set to be from 39% to 95% in relation to a barrier arrangement area that is calculated by the product between a dimension in the length direction of the barrier and a dimension from an inner wall surface of the vertical wall array of the barrier, disposed closest to the engaging element to an outer wall surface of the vertical wall array disposed on an outermost side.
8. The molding hook and loop fastener according to claim 1 , wherein:
the engaging elements are disposed at a predetermined pitch in a width direction of the substrate,
a lateral wall portion is disposed along the width direction between the barrier and the engaging elements and between the engaging elements that are adjacent in the width direction, and
an upper surface of the vertical wall array is disposed on the same plane as an upper surface of the lateral wall portion.