WO2023248990A1 - Élément de fixation de surface et dispositif de moulage - Google Patents

Élément de fixation de surface et dispositif de moulage Download PDF

Info

Publication number
WO2023248990A1
WO2023248990A1 PCT/JP2023/022659 JP2023022659W WO2023248990A1 WO 2023248990 A1 WO2023248990 A1 WO 2023248990A1 JP 2023022659 W JP2023022659 W JP 2023022659W WO 2023248990 A1 WO2023248990 A1 WO 2023248990A1
Authority
WO
WIPO (PCT)
Prior art keywords
hook
loop fastener
stem portion
shape
machine direction
Prior art date
Application number
PCT/JP2023/022659
Other languages
English (en)
Japanese (ja)
Inventor
翔一 横山
研人 三橋
雅之 猶原
勇 道端
Original Assignee
Ykk株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ykk株式会社 filed Critical Ykk株式会社
Publication of WO2023248990A1 publication Critical patent/WO2023248990A1/fr

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners

Definitions

  • the present invention relates to a hook-and-loop fastener and a molding device used for manufacturing the hook-and-loop fastener.
  • hook-and-loop fasteners Conventionally, there have been two types of hook-and-loop fasteners: a female-type hook-and-loop fastener (hereinafter referred to as a loop member) having multiple loops, and a male-type hook-and-loop fastener (hereinafter referred to simply as a hook-and-loop fastener) that can be attached to and detached from the loop member.
  • Hook-and-loop fastener products are known that are used in combination with
  • a hook-and-loop fastener has, for example, a flat base portion and a plurality of engaging elements that protrude from the base portion and have a shape such as a mushroom shape.
  • Hook-and-loop fasteners are currently widely used in a wide variety of products, including disposable diapers, diaper covers for infants, supports to protect the joints of limbs, waist corsets (lower back pain belts), gloves, etc. It is also used for products that can be attached and detached from the body. Further, an example of a hook-and-loop fastener used for disposable diapers and the like is disclosed in International Publication No. 2017/109902 (Patent Document 1).
  • the hook-and-loop fastener described in Patent Document 1 includes a base portion and a plurality of engagement elements protruding from the base portion.
  • Each engagement element of Patent Document 1 has a stem portion rising from a base portion, and a disc-shaped engagement head integrally formed at the upper end portion of the stem portion.
  • the engagement head is provided with a plurality of minute claws that protrude from the outer peripheral edge of the engagement head.
  • the hook-and-loop fastener of Patent Document 1 is manufactured using a manufacturing device that includes a molding device that performs primary molding and a heating press device that performs secondary molding.
  • the molding device includes one die wheel that rotates in one direction, a supply nozzle arranged to face the outer peripheral surface of the die wheel, and a pickup roller arranged downstream of the supply nozzle in the rotational direction of the die wheel. has.
  • the die wheel includes a cylindrical outer sleeve that serves as a mold, a cylindrical inner sleeve that is closely disposed inside the outer sleeve, and a drive roller that rotates the outer sleeve and the inner sleeve in one direction.
  • the outer sleeve is provided with a plurality of through holes that penetrate from the outer circumferential surface to the inner circumferential surface of the outer sleeve.
  • a plurality of recesses are provided on the outer peripheral surface of the inner sleeve.
  • the heating and pressing device has a pair of upper and lower pressing rollers (calendar rollers).
  • a method for manufacturing a male hook-and-loop fastener instead of using a molding device equipped with one die wheel as described above, a die wheel with a plurality of cavities provided on the outer circumferential surface and a die wheel arranged opposite to the die wheel are used.
  • a method using a twin-roll type molding device equipped with a pressing wheel is known.
  • molten synthetic resin material is supplied from a supply nozzle toward a space between a die wheel and a press wheel that face each other.
  • the base part is formed between the die wheel and the pressing wheel, and the engagement element (or the primary element before being formed into the engagement element) is formed on the outer peripheral surface of the die wheel.
  • Hook-and-loop fasteners can be manufactured continuously.
  • the base portion when stretching along the machine direction (MD) to a molded body (primary molded body) obtained using the forming apparatus of Patent Document 1, the base portion may be pulled in the machine direction within the stretching apparatus. This may cause the base portion to break along the machine direction.
  • the tear strength in the orthogonal direction (CD) of the hook-and-loop fastener may decrease, for example, when force is applied to the base of the hook-and-loop fastener.
  • orthogonal tearing in which the base portion is torn in an orthogonal direction, may occur.
  • the hook-and-loop fastener is perpendicular to the stretched base portion. It is possible that directional tearing or rupture may occur.
  • the orthogonal direction (CD) means a direction perpendicular to the machine direction (MD) during manufacturing.
  • the present invention has been made in view of the above-mentioned conventional problems, and its objects are to provide a hook-and-loop fastener that exhibits different structures and/or properties between the machine direction and the orthogonal direction, and to An object of the present invention is to provide a molding device used for manufacturing fasteners.
  • a hook-and-loop fastener provided by the present invention includes a base part and a plurality of engaging elements integrally formed with the base part, each engaging element being connected to the base part. a stem portion protruding from a surface of the base portion in the thickness direction of the base portion; and an engaging head formed at a distal end portion of the stem portion; A hook-and-loop fastener made of synthetic resin, wherein the orthogonal cross section has a circular or nearly circular shape, and the engaging head has a shape that extends from the tip of the stem part to the entire direction perpendicular to the thickness direction.
  • an outer surface facing in a direction orthogonal to the machine direction is formed in a straight shape or a substantially straight shape. and a second shape when the engaging element is viewed from the orthogonal direction, the outer surface facing the machine direction is curved toward the surface of the base portion.
  • the stem portion includes, in the second shape, a portion in the upper half portion of the stem portion in which the outer surface facing the machine direction is formed in a straight shape or a substantially straight shape; It is preferable that the straight or substantially straight portion of the second shape is formed in a shorter range than the straight or substantially straight portion of the first shape.
  • hook-and-loop fastener includes a base portion and a plurality of engaging elements integrally formed with the base portion, each engaging element being connected to the base portion. It has a stem portion that protrudes from the surface in the thickness direction of the base portion, and an engagement head formed at the tip of the stem portion, and is perpendicular to the thickness direction at least at the upper end portion of the stem portion.
  • the hook-and-loop fastener is made of a synthetic resin and has a cross section having a circular or nearly circular shape, and the engaging head has a shape that extends from the tip of the stem portion to the entire direction perpendicular to the thickness direction.
  • the length of the connecting part of the stem part connected to the base part in the orthogonal direction perpendicular to the machine direction is defined as a first dimension
  • the engaging element is
  • the length of the connecting portion of the stem portion in the machine direction is the second dimension when viewed from the orthogonal direction
  • the stem portion has a shape in which the second dimension is larger than the first dimension
  • the peel strength of the hook and loop fastener when the hook and loop member and the loop member that engage with each other are peeled off along the machine direction and the orthogonal direction are respectively defined as MD peel strength and CD peel strength.
  • the stem portion has a shape such that the CD peel strength is greater than the MD peel strength.
  • Yet another aspect of the hook-and-loop fastener provided by the present invention includes a base portion and a plurality of engaging elements integrally formed with the base portion, each engaging element being arranged on a surface of the base portion.
  • a stem portion protruding from the base portion in the thickness direction, and an engaging head formed at the distal end portion of the stem portion, and a cross section perpendicular to the thickness direction at least at the upper end portion of the stem portion; is a synthetic resin hook-and-loop fastener having a circular or nearly circular shape, and the engaging head having a shape that extends from the tip of the stem portion to the entire direction perpendicular to the thickness direction, , CD flexibility when bending a portion of the hook-and-loop fastener along the orthogonal direction orthogonal to the machine direction in the thickness direction causes the portion of the hook-and-loop fastener along the machine direction to curve in the thickness direction. This is higher than the MD flexibility at the time.
  • the plurality of engaging elements are arranged in a line at constant pitch intervals along the machine direction to form an element row, and the plurality of element rows are arranged in a row in the orthogonal direction.
  • the engaging elements of each element row are arranged at regular intervals, and are shifted in the machine direction by half the pitch interval with respect to the positions of the engaging elements of the element rows adjacent in the orthogonal direction.
  • the engagement element is arranged in such a position that, with respect to the machine direction, the formation range of the stem portion of each engagement element is the same as that of the stem portion of the engagement element in the element rows adjacent to each other in the orthogonal direction.
  • each engagement element has at least one claw portion protruding from the outer peripheral edge of the engagement head in the orthogonal direction.
  • the molding device provided by the present invention includes a die wheel that rotates in one direction, a supply nozzle that supplies molten synthetic resin toward the die wheel, and a plurality of engagement elements on a base portion.
  • each engaging element has a stem portion protruding from the surface of the base portion in the thickness direction of the base portion, and an engaging head formed at a distal end portion of the stem portion.
  • the die wheel has at least one cylindrical sleeve and a drive roller that rotates the sleeve, and the sleeve penetrates from the outer peripheral surface to the inner peripheral surface of the sleeve.
  • the through-holes of each hole row are arranged at regular intervals in orthogonal directions, and the through-holes of each hole row are half the hole pitch interval in the machine direction with respect to the positions of the through-holes of the hole rows adjacent in the orthogonal direction.
  • the through-holes are arranged at positions shifted in size, and the through-holes are arranged in a portion where, with respect to the machine direction, the formation range of each through-hole overlaps with the formation range of the through-holes in the hole rows adjacent in the orthogonal direction. It is placed in a position with
  • FIG. 2 is a schematic diagram schematically illustrating a manufacturing apparatus for manufacturing the hook-and-loop fastener shown in FIG. 1.
  • FIG. 1 is a schematic diagram schematically illustrating a manufacturing apparatus for manufacturing the hook-and-loop fastener shown in FIG. 1.
  • FIG. 6 is a schematic diagram schematically showing a part of the outer sleeve included in the molding device of the manufacturing device shown in FIG. 5;
  • FIG. 2 is a perspective view schematically showing a primary molded body formed in a primary molding process. It is an explanatory view explaining a peel strength test. It is another explanatory diagram explaining a peel strength test.
  • FIG. 2 is a schematic diagram schematically showing a test device for measuring the flexibility of a hook-and-loop fastener.
  • FIG. 11 is a schematic diagram schematically showing a state in which the hook-and-loop fastener is pressed by the testing device of FIG. 10;
  • the present invention is not limited to the embodiments described below, and various modifications may be made as long as they have substantially the same configuration as the present invention and achieve similar effects. It is possible.
  • the length dimension (dimension in the machine direction MD) and width dimension (dimension in the orthogonal direction CD) of the hook-and-loop fastener of the present invention are not particularly limited, and can have any shape by cutting the hook-and-loop fastener. It is possible.
  • FIG. 1 is a copy of a photograph taken from above of a part of the hook-and-loop fastener according to this embodiment.
  • 2 to 4 are a photograph taken from above (plan view), a photograph taken from the machine direction side (front view or rear view), and an orthogonal photograph of one engaging element of the hook-and-loop fastener according to the present embodiment, respectively. This is a copy of a photograph taken from the direction (side view).
  • the front-back direction is the length direction of the hook-and-loop fastener and the primary molded object which are formed into a long length.
  • the front-rear direction is a direction (first direction) along the machine direction MD in which the hook-and-loop fastener or the primary formed body is conveyed in the hook-and-loop fastener manufacturing process.
  • the left-right direction refers to the width direction that is perpendicular to the length direction and along the flat upper surface (first surface) or lower surface (second surface) of the base portion of the hook-and-loop fastener.
  • the left-right direction and the width direction are directions (second direction) along the orthogonal direction CD orthogonal to the machine direction MD.
  • the up-down direction is a height direction (or a thickness direction of the base part) along a direction perpendicular to the flat upper surface or lower surface of the base part, and is also a direction perpendicular to the front-back direction and the left-right direction.
  • the direction of the side where the engaging element projects with respect to the base portion is defined as the upper side in the vertical direction, and the opposite direction is defined as the lower side.
  • the hook-and-loop fastener 10 is manufactured by using a manufacturing apparatus 50 having a forming apparatus 60, a heating press apparatus 70, and a stretching apparatus 80 shown in FIG. Manufactured into shapes.
  • the hook-and-loop fastener 10 is made of thermoplastic resin such as polypropylene, polyester, nylon, polybutylene terephthalate, or a copolymer thereof. Note that the material of the hook-and-loop fastener 10 is not particularly limited, and the hook-and-loop fastener 10 may be formed using, for example, a biodegradable resin, a plant-derived resin, or a thermoplastic resin obtained by recycling.
  • the hook-and-loop fastener 10 includes a flat base portion 11 with a thin thickness, and a plurality of engaging elements 20 that protrude from the upper surface of the base portion 11 and have a mushroom-like shape. has.
  • the base portion 11 is formed to be long along the machine direction MD when the hook and loop fastener 10 is manufactured.
  • the base portion 11 has a certain thickness that ensures appropriate strength and flexibility.
  • the upper surface (first surface) of the base portion 11 and the lower surface (second surface) disposed on the opposite side of the upper surface are each flat or approximately flat, and are formed parallel to each other.
  • Each engagement element 20 includes a stem portion 21 that projects upward from the upper surface of the base portion 11, a disk-shaped engagement head 22 that is integrally formed at the upper end of the stem portion 21, and an engagement head 22 that is integrally formed at the upper end of the stem portion 21. It has two minute claw portions 23 that protrude outward from the outer peripheral edge along the orthogonal direction CD.
  • the shape of the stem portion 21 when the engaging element 20 is viewed from the machine direction MD is defined as a first shape 31 of the stem portion 21
  • the shape of the stem portion 21 when the engaging element 20 is viewed from the orthogonal direction CD is defined as a first shape 31 of the stem portion 21.
  • the shape is defined as the second shape 32 of the stem portion 21.
  • the stem portion 21 (particularly the lower half of the stem portion 21) of each engagement element 20 is stretched along the machine direction MD, which will be described later, in the manufacturing process of the hook-and-loop fastener 10.
  • a first shape 31 (see FIG. 3) of the portion 21 and a second shape 32 (see FIG. 4) of the stem portion 21 are formed to be different from each other.
  • the first shape 31 and the second shape 32 of the stem portion 21 are different from each other mainly in the lower half of the stem portion 21, and the first shape 31 of the stem portion 21
  • the lower half portion is formed to be thinner than the lower half portion of the second shape 32 of the stem portion 21 .
  • the engagement element 20 is formed to be more flexible in the orthogonal direction CD than in the machine direction MD, for example, when a force is applied from above the engagement element 20.
  • the upper half and the lower half of the stem portion 21 respectively refer to the base portion of the stem portion 21 that is closer to the base portion than the center position when the stem portion 21 is partitioned at the center position in the height direction of the stem portion 21. 11, and a portion closer to the base portion 11 than the central position thereof.
  • the first shape 31 of the stem portion 21 is perpendicular to the stem portion 21.
  • the outer surface 21a facing the direction CD is straight from the upper end position of the stem part 21 connected to the engagement head 22 to the lower end position (connection part) of the stem part 21 connected to the base part 11. It is formed in an extending straight shape, or in a substantially straight shape extending along a nearly straight line.
  • an angle of approximately 95° is formed between the outer surface 21a of the stem portion 21 facing in the orthogonal direction CD and the upper surface of the base portion 11.
  • the size of the angle between the outer surface of the stem portion 21 facing in the orthogonal direction CD and the upper surface of the base portion 11 is not limited to this.
  • the first shape 31 includes a curved portion in which the outer surface 21a of the stem portion 21 facing in the orthogonal direction CD is curved concavely in the vertical direction, for example, at the lower end portion of the stem portion 21 close to the base portion 11. It may be formed of.
  • the straight or substantially straight portion of the outer surface 21a of the first shape 31 covers 50% or more, preferably 60% or more of the vertical range of the lower half of the stem portion 21. Preferably.
  • a straight shape extending straight or a substantially straight shape extending along a nearly straight line means that the outer circumferential surface of the stem portion 21 formed in a substantially cylindrical shape, which will be described later, is This refers to a shape in which the outer circumferential surface of the stem portion 21 does not include a curved portion that is concavely curved or clearly curved in the vertical direction when viewed from the direction.
  • the outer surface 21a of the stem portion 21 facing in the orthogonal direction CD forms an angle larger than 95° (for example, an angle of 100 to 110°) with the upper surface of the base portion 11, the outer surface If 21a extends straight or along a nearly straight line, it is assumed that it is formed in a straight shape or a substantially straight shape.
  • the second shape 32 of the stem portion 21 has an outer surface 21a facing in the machine direction MD of the stem portion 21 in a straight or substantially straight shape. and a curved portion in which the outer surface 21a extends in a concave manner in the vertical direction.
  • the portion where the outer surface 21a of the stem portion 21 facing in the machine direction MD is formed in a straight shape or a substantially straight shape is mainly provided in the upper half of the stem portion 21, and It is formed in a shorter range than the straight or substantially straight portion of the first shape 31 shown in FIG.
  • the curved portion formed by curving the outer surface 21a of the stem portion 21 facing the machine direction MD is provided mainly in the lower half of the stem portion 21.
  • the curved portion of the outer surface 21a of the second shape 32 is preferably provided over 30% or more, preferably 40% or more of the vertical range of the lower half of the stem portion 21.
  • the curved portion of the outer surface 21a of the second shape 32 is longer than the curved portion of the first shape 31, for example, if the curved portion is provided at the lower end of the first shape 31.
  • the shape of the outer surface 21a facing in the orthogonal direction CD in the first shape 31 shown in FIG. 3 is similar to the shape of the upper half of the outer surface 21a facing in the machine direction MD in the second shape 32 shown in FIG.
  • the outer surface 21a of the stem portion 21 facing in the machine direction MD is formed at an angle of approximately 95° with respect to a direction parallel to the upper surface of the base portion 11. is formed.
  • the portion where the outer surface 21a of the stem portion 21 facing in the machine direction MD is formed in a straight or substantially straight shape is the entire height dimension of the stem portion 21 in the second shape 32 (the height of the base portion 11). It is arranged in a range of 1/2 or more and 3/4 or less of the vertical dimension from the upper surface to the upper end of the stem portion 21.
  • the lower half of the stem portion 21 exhibiting the second shape 32 has a second shape as shown in FIG.
  • the thickness of the stem part 21 is changed significantly so that the stem part 21 becomes thicker as it approaches the base part 11 compared to the lower half part of the stem part 21 which shows one shape 31.
  • the straight or substantially straight outer surface 21a of the stem portion 21 extends to the lower end connected to the base portion 11 of the stem portion 21, and the straight or substantially straight outer surface 21a A boundary portion that sharply bends at an angle close to 90° (approximately 95°) is provided between the base portion 11 and the upper surface (surface).
  • the outer surface 21a of the lower half of the stem portion 21 is gently and largely curved, and the slope of the outer surface 21a of the stem portion 21 becomes gentler as it approaches the base portion 11. Therefore, the outer surface 21a of the stem portion 21 in the second shape 32 is formed so as to be smoothly continuous with the surface of the base portion 11.
  • the upper half of the stem portion 21 is formed into a substantially cylindrical shape. Therefore, the outer circumferential surface of the upper half of the stem portion 21 is formed into a curved surface that continues smoothly all around the circumference, and the outer circumferential surface is not provided with any angular ridge lines or protrusions. Further, the stem portion 21 is formed such that a cross section of the upper end portion of the stem portion 21 perpendicular to the vertical direction has a circular or nearly circular shape (substantially circular shape).
  • the connecting portion i.e., the lower end of the stem portion 21
  • the connecting portion that connects to the base portion 11 of the stem portion 21 is shaped like an ellipse or a long ellipse in the machine direction MD such that the maximum dimension in the machine direction MD is larger than the maximum dimension in the orthogonal direction CD. It is formed into a substantially elliptical shape.
  • a substantially elliptical shape means a shape close to an ellipse, and includes, for example, an oval shape.
  • the length of the connecting portion along the orthogonal direction CD when the engaging element 20 is viewed from the machine direction MD is defined as a first dimension D1
  • the length of the connecting portion in the machine direction MD when viewed from the orthogonal direction CD is defined as a second dimension D2.
  • the stem portion 21 is formed such that the second dimension D2 of the connecting portion in the second shape 32 is larger than the first dimension D1 of the connecting portion in the first shape 31.
  • the second dimension D2 of the connecting portion in the second shape 32 is, for example, 1.5 to 2 times the length of the first dimension D1 of the connecting portion in the first shape 31.
  • the plurality of engaging elements 20 are provided on the upper surface of the base portion 11 in a regular alignment in a staggered arrangement pattern.
  • the engaging elements 20 are arranged at constant pitch intervals along the machine direction MD (front-back direction), thereby forming an engaging element row 26.
  • the plurality of engagement element rows 26 are arranged at regular intervals in the orthogonal direction CD (left-right direction).
  • the engagement elements 20 of each engagement element row 26 are arranged at a pitch of 1/2 in the machine direction MD with respect to the position of the engagement elements 20 of the engagement element rows 26 adjacent in the orthogonal direction CD. They are placed at shifted positions based on the size of the interval.
  • the plurality of engagement elements 20 are arranged alternately or in a zigzag pattern between the engagement element rows 26 adjacent to each other in the orthogonal direction CD.
  • the formation range 27 of the stem portion 21 of each of the engagement elements 20 corresponds to the engagement elements of the engagement element rows 26 adjacent to each other in the orthogonal direction CD. It is arranged at a position having an overlapping portion with respect to the formation range 27 of 20.
  • the edge of the stem portion 21 of each engaging element 20 on one side (for example, the front side) in the machine direction MD is It is located between an edge on one side (for example, the front side) and an edge on the other side (for example, the rear side) in the machine direction MD.
  • the second shape 32 of the stem portion 21 when the engaging element 20 is viewed from the orthogonal direction CD includes a portion that curves the outer surface 21a of the stem portion 21, and when viewed from the machine direction MD;
  • the connecting portion of the stem portion 21 that connects to the base portion 11 is formed so that the second dimension D2 in the machine direction MD is larger than the first shape 31 of the stem portion 21 when viewed, and
  • the formation range 27 of the engaging elements 20 of the engaging element rows 26 adjacent in the orthogonal direction CD overlaps with the formation range 27 of the engaging elements 20 of the engaging element rows 26 adjacent to each other in the orthogonal direction CD.
  • the strength of the portion 11 in the machine direction MD can be effectively increased. For this reason, for example, in the stretching process for forming the base part 11 in the manufacturing process of the hook-and-loop fastener 10, when the base part 11 is pulled and stretched in the machine direction MD, it is possible to prevent defects such as breakage from occurring in the base part 11. .
  • the engagement head 22 is formed relatively thin in the vertical direction, and extends from the tip of the stem portion 21 in a direction perpendicular to the vertical direction (that is, from the top surface of the base portion 11). It has a shape that spreads over the entire area (parallel direction). Furthermore, when the engaging element 20 is viewed from above, the engaging head 22 has an elliptical or substantially elliptical shape that is long in the orthogonal direction CD, as shown in FIG.
  • the disc-shaped engagement head 22 is formed to radially project outward from the upper end of the stem portion 21 (in other words, the boundary between the stem portion 21 and the engagement head 22).
  • the shape of the engaging head is not limited to the shape of an ellipse or a disk that is approximately elliptical when viewed from above, but may extend from the tip of the stem portion 21 in a direction parallel to the surface of the base portion 11. If it is formed, it may have a shape that is a perfect circle, a shape close to a perfect circle, or a shape close to a polygon such as a quadrilateral when viewed from above.
  • Each engagement element 20 is provided with a pair of left and right minute claws 23 that protrude in opposite directions from the outer peripheral edge of the engagement head 22 along the orthogonal direction CD.
  • the left and right claw portions 23 are arranged at the left and right ends of the engagement head 22 that is long in the orthogonal direction CD.
  • the outer peripheral edge of the engaging head 22 has a non-formed region where the claw portion 23 is not provided, and in this embodiment, the non-formed region of the claw portion 23 in the engaging head 22 is as follows. It is arranged facing the machine direction MD.
  • each of the left and right claw portions 23 has a shape that hangs diagonally downward from the outer peripheral edge of the engagement head 22 toward the tip in the protruding direction so as to approach the base portion 11.
  • each claw portion 23 has a base end portion connected to the engagement head portion 22 of the claw portion 23 that has a dimension in the machine direction MD of the engagement head portion 22 in a plan view when the engagement element 20 is viewed from above.
  • the size is smaller than the maximum value of , preferably 2/3 or less of the maximum value.
  • the shape and size of the engaging head are not particularly limited as long as the engaging head is formed in a shape that extends from the upper end of the stem portion in a direction orthogonal to the up-down direction.
  • the shape of the claws, the number of claws installed, the direction in which the claws project from the engaging head, etc. are not particularly limited.
  • the engaging element may be formed without providing a claw portion.
  • One hook-and-loop fastener may be provided with a plurality of types of engagement elements having mutually different shapes.
  • the manufacturing device 50 of this embodiment includes a molding device 60 that performs primary molding, and a secondary molded product (preform) that performs secondary molding on the primary molded object 40 (see FIG. 7) molded by the molding device 60. It has a heating and pressing device 70 for forming a fastener body) and a stretching device 80 for stretching the obtained secondary formed body.
  • the pre-fastener body means a molded body or member before being subjected to stretching when the hook-and-loop fastener 10 is manufactured by stretching.
  • the molding device 60 includes a die wheel 61 that is driven to rotate in one direction (counterclockwise in the drawing) and a supply nozzle that is disposed facing the circumferential surface of the die wheel 61 and continuously supplies a molten synthetic resin material. 65, and a pickup roller 66 disposed downstream of the supply nozzle 65 in the rotational direction of the die wheel 61.
  • the die wheel 61 includes a cylindrical outer sleeve (outer cylindrical body) 62 serving as a mold, a cylindrical inner sleeve (inner cylindrical body) 63 disposed closely inside the outer sleeve 62, and an outer sleeve 62. and a drive roller 64 that rotates the inner sleeve 63 in one direction.
  • a cooling jacket (not shown) is provided inside the drive roller 64 to allow cooling fluid to flow therethrough.
  • each through hole 62a has a substantially truncated conical shape in which the outer peripheral surface of the outer sleeve 62 has a larger circular shape than the inner peripheral surface of the outer sleeve 62.
  • the formation positions of the plurality of through holes 62a provided in the outer sleeve 62 correspond to the positions where the engagement elements 20 are arranged in the secondary molded body to be produced.
  • the plurality of through holes 62a are provided in the outer sleeve 62 in regular alignment in a staggered arrangement pattern, as shown in FIG. 6, for example.
  • the through holes 62a are arranged at constant pitch intervals along the machine direction MD, thereby forming a hole row 62b.
  • the plurality of hole rows 62b are arranged at regular intervals in the orthogonal direction CD.
  • the positions of the through holes 62a of each hole row 62b are shifted by a pitch interval of 1/2 in the machine direction MD with respect to the positions of the through holes 62a of the hole rows 62b adjacent to each other in the orthogonal direction CD. It is placed in the same position.
  • the plurality of through holes 62a are arranged alternately or in a zigzag pattern between the hole rows 62b adjacent to each other in the left-right direction.
  • the plurality of through holes 62a are located at positions where, in the machine direction MD, the formation range 62c of each through hole 62a overlaps with the formation range 62c of the through hole 62a of the adjacent hole row 62b in the orthogonal direction CD. It is arranged.
  • the plurality of through holes 62a in the outer sleeve 62 in such a positional relationship, when the hook-and-loop fastener 10 is manufactured, the plurality of engagement elements 20 can be arranged in rows of engagement elements adjacent in the orthogonal direction CD.
  • the engagement elements 20 can be stably arranged so that the formation ranges 27 of the engagement elements 20 overlap each other between the engagement elements 26.
  • a plurality of grooves are formed on the outer peripheral surface of the inner sleeve 63.
  • Each of the grooves is recessed linearly along the orthogonal direction CD parallel to the central axis of the inner sleeve 63 and has a size that allows the molten synthetic resin to flow therein.
  • the groove portions are formed at regular intervals along the circumferential direction (machine direction MD) of the inner sleeve 63. Furthermore, at least a portion of the groove portion of the inner sleeve 63 is provided so as to intersect with the outer circumferential edge of the through hole 62a formed in the inner circumferential surface of the outer sleeve 62 when the die wheel 61 is assembled.
  • the form of the recess provided on the outer circumferential surface of the inner sleeve is not limited to the linear groove as in this embodiment.
  • the outer circumferential surface of the inner sleeve may be provided with, for example, a concave groove bent in a zigzag shape, or a concave portion recessed in a three-dimensional shape such as a rectangular parallelepiped from the outer circumferential surface of the inner sleeve.
  • the die wheel does not have two sleeves, an outer and an inner sleeve, as in this embodiment, but has, for example, a plurality of through holes penetrating from the outer circumferential surface to the inner circumferential surface, and a plurality of through holes provided on the inner circumferential surface.
  • the sleeve may be formed with one sleeve having a recessed groove portion.
  • the pickup roller 66 has a pair of upper and lower clamping rollers 67 and 68 that clamp and pull the primary formed body 40 formed on the outer peripheral surface of the die wheel 61 from above and below.
  • a surface layer (not shown) made of an elastomer such as a polyurethane elastomer is provided on each outer peripheral surface of the upper clamping roller 67 and the lower clamping roller 68.
  • the heating and pressing device 70 has a pair of upper and lower pressing rollers (calendar rollers) 71 and 72 arranged downstream of the pickup roller 66.
  • the upper pressing roller 71 and the lower pressing roller 72 are arranged facing each other with a predetermined interval therebetween.
  • the distance between the upper pressing roller 71 and the lower pressing roller 72 can be adjusted by a height adjusting means (not shown).
  • the upper pressing roller 71 is equipped with a heating source (not shown) inside, and the surface temperature of the upper pressing roller 71 is set to a temperature that can soften the synthetic resin forming the hook-and-loop fastener 10 (primary molded body 40). be done.
  • the structure of the heating and pressing device is not particularly limited as long as it can press at least a portion of the primary molded body 40 to form an engagement element as described later.
  • the stretching device 80 is installed downstream of the heating and pressing device 70 in order to perform at least a stretching process on the pre-fastener body (secondary molded object) formed by the heating and pressing device 70.
  • the stretching device 80 includes a supply section that introduces the pre-fastener body into the stretching device 80, a discharge section that sends out the stretched hook-and-loop fastener 10 downstream, and a supply section and a discharge section. It has a plurality of rotating rollers arranged along the conveyance path of the member to be processed (ie, the pre-fastener body or the hook-and-loop fastener 10).
  • Each rotating roller is configured to be able to convey the workpiece toward the downstream side at a speed corresponding to the rotational speed of the workpiece by rotating while contacting the workpiece. Furthermore, at least some of the rotating rollers are configured to be able to heat the workpiece at a preset heating temperature by bringing the workpiece into contact with the outer peripheral surface of the roller.
  • the rotating rollers of the stretching device 80 include a heating roller that heat-treats the pre-fastener body, a stretching roller that stretches the pre-fastener body between the heating roller, and a relaxing roller disposed downstream of the stretching roller. is included.
  • the heating roller, the stretching roller, and the relaxing roller are installed so as to meander up and down the conveyance path of the workpiece.
  • the heating roller conveys the pre-fastener body by rotating at a constant rotational speed, and heats the pre-fastener body by bringing it into contact with the roller surface.
  • the heating roller is provided with a support roller (nip roller) disposed opposite to the heating roller, and the heating roller and the support roller hold the pre-fastener body between the top and bottom while each holding the pre-fastener body at a certain level. Rotate at speed.
  • This heating roller can heat the pre-fastener body before stretching to a temperature at which it can be stretched.
  • the means and method for performing the heat treatment before stretching are not particularly limited.
  • the stretching roller is controlled to rotate at a faster rotation speed than the heating roller while bringing the workpiece into contact with the roller surface.
  • the rotation speed of the stretching roller is set to 110% or more and 200% or less of the rotation speed of the heating roller.
  • the heating temperature of the stretching roller is set to be higher than the heating temperature of the heating roller and lower than the melting point of the synthetic resin forming the hook-and-loop fastener 10.
  • the relaxation roller is controlled to rotate at a slower rotation speed than the stretching roller while bringing the workpiece into contact with the roller surface.
  • the heating temperature of the relaxation roller is set lower than the melting point of the synthetic resin forming the hook-and-loop fastener 10.
  • the stretching device 80 of the present embodiment described above is only an example.
  • the stretching device is disposed at least on the downstream side of the forming device, and is configured to be able to stretch along the machine direction MD a molded object such as a pre-fastener body sent out from the primary forming device or the heating press device. If so, the structure is not particularly limited.
  • the manufacturing method of this embodiment includes a primary molding step of molding a primary molded body 40 as shown in FIG.
  • the hook-and-loop fastener 10 is formed by performing a secondary forming process to form a pre-fastener body (not shown) equipped with the engaging elements 20, and by stretching the pre-fastener body along the machine direction MD using a stretching device 80. and a stretching step of forming.
  • molten synthetic resin is continuously supplied from the supply nozzle 65 toward the outer peripheral surface of the die wheel 61.
  • the temporary base portion 41 is continuously formed between the supply nozzle 65 and the die wheel 61.
  • a plurality of primary elements (temporary elements) 42 are integrally molded with the temporary base portion 41 by the through hole 62a provided in the outer sleeve 62 of the die wheel 61 and the groove portion provided in the inner sleeve 63. Therefore, through this primary molding step, a primary molded body 40 shown in FIG. 7 is molded.
  • the primary molded body 40 formed at this time has a flat temporary base portion 41 and a plurality of primary elements 42 protruding from the upper surface of the temporary base portion 41.
  • the temporary base portion 41 is formed thicker than the base portion 11 of the hook-and-loop fastener 10 to be manufactured.
  • the primary element 42 is transformed into the engagement element 20 by being subjected to secondary molding (press molding) in the secondary molding process.
  • the plurality of primary elements 42 are provided on the temporary base portion 41 in a staggered arrangement pattern.
  • Each primary element 42 includes a truncated conical primary stem portion 43 protruding from the temporary base portion 41, a bar-shaped rib portion 44 that partially bulges upward from the upper surface of the primary stem portion 43, and is integral with the rib portion 44.
  • the rib portion 44 has two protruding portions (primary claw portions) 45 that are formed as shown in FIG.
  • the rib portion 44 and the left and right protrusions 45 are formed along the orthogonal direction CD. Further, the left and right protrusions 45 protrude outward from the upper end surface of the primary stem portion 43.
  • the formation range of the primary stem portion 43 of each primary element 42 in the machine direction MD is perpendicular to each other. Element rows adjacent in direction CD are formed so as to overlap each other.
  • the primary element 42 may have two protruding parts (primary claw parts) 45 that partially bulge upward from the upper surface of the primary stem part 43. In this case, in the secondary molding process described later, four minute claws 23 protruding outward from the outer peripheral edge of the engaging head 22 are formed.
  • the above-mentioned primary molded body 40 is molded by carrying the molten synthetic resin on the outer peripheral surface of the die wheel 61 and rotating it half a rotation while being cooled. Thereafter, the primary molded body 40 is continuously peeled off from the outer peripheral surface of the die wheel 61 by the pickup roller 66.
  • the primary formed body 40 peeled off from the die wheel 61 is conveyed toward a heating and pressing device 70 that performs a secondary molding process, and is transported between an upper pressing roller 71 and a lower pressing roller 72 of the heating pressing device 70.
  • the temporary base portion 41 of the primary formed body 40 is supported from below by the lower pressing roller 72. Further, at least the upper end portion of each primary element 42 of the primary molded body 40 is heated and softened by the upper pressing roller 71 and is pressed from above. As a result, a secondary element (not shown) is molded from the primary element 42, so that a pre-fastener body in which a plurality of secondary elements are integrally formed on the temporary base portion 41 is manufactured.
  • the secondary element formed in this secondary molding step is formed integrally with a substantially truncated conical secondary stem portion rising from the temporary base portion 41 and an upper end portion of the secondary stem portion.
  • the engagement head 22 has two minute claws 23 that protrude outward from the outer peripheral edge of the engagement head 22.
  • the secondary stem portion of each secondary element has a circular or substantially circular cross section perpendicular to the vertical direction, and the diameter of the cross section gradually decreases as it moves away from the temporary base portion 41.
  • the shape of the secondary stem portion when the secondary element is viewed from the machine direction MD and the shape of the secondary stem portion when the secondary element is viewed from the orthogonal direction CD are the same or approximately the same shape. It is formed.
  • the engagement head 22 and claw portion 23 provided on each secondary element have substantially the same shape and size as the engagement head 22 and claw portion 23 of the engagement element 20 shown in FIGS. 1 to 4. It is formed.
  • the pre-fastener body sent out from the heating and pressing device 70 is conveyed to the stretching device 80 (see FIG. 5).
  • the stretching device 80 a pre-fastener body is introduced into the stretching device 80 from a supply section (not shown), and the pre-fastener body is subjected to heat treatment (heating step) with a heating roller and stretching performed between the heating roller and the stretching roller. Processing (stretching process) and relaxation treatment after stretching process (relaxation process) are performed in order.
  • the pre-fastener body is brought into contact with the roller surface of a heating roller, thereby heating the pre-fastener body to a temperature at which it can be stretched.
  • the pre-fastener body is stretched along the machine direction MD between the heating roller and a stretching roller that rotates at a faster rotation speed than the heating roller.
  • Stretching processing (uniaxial stretching processing) is performed.
  • the temporary base portion 41 of the pre-fastener body can be stretched in the machine direction MD to form the base portion 11 of the hook-and-loop fastener 10.
  • the thickness between the upper surface and the lower surface of the base part 11 obtained after this stretching process is made thinner than the thickness between the upper surface and the lower surface of the temporary base part 41 after the secondary molding process.
  • the processing conditions for the stretching process include, for example, at least one of the heating temperature of the pre-fastener body, the rotation speed of the heating roller, the rotation speed of the stretching roller, and the like.
  • the approximately truncated conical secondary stem portion is extended in the machine direction MD, and the connecting portion with the base portion 11 is formed into an elliptical shape or approximately elongated in the machine direction MD.
  • the stem portion 21 can be deformed into an elliptical shape. Further, the stem portion 21 can be formed in a shape in which the first shape 31 and the second shape 32 described above are different from each other. As a result, an engaging element 20 having a shape as shown in FIGS. 1 to 4 is molded from the secondary element molded in the secondary molding process.
  • this stretching process can make it difficult to cause the base portion 11 to break along the machine direction MD.
  • the reason for making this breakage difficult to occur is not clear, one of the reasons for this is that in this embodiment, even in the secondary element of the pre-fastener body, the engagement of the hook-and-loop fastener 10 to be manufactured is In the element 20 as well, it is conceivable that the formation range 27 of the secondary stem portion or the stem portion 21 overlaps each other between adjacent element rows in the orthogonal direction CD.
  • the formation range 27 of the secondary stem portion or stem portion 21 overlaps between adjacent element rows in the orthogonal direction CD, so that the strength of the temporary base portion or the base portion 11 is increased. Local reduction can be suppressed. For this reason, it is thought that it is possible to make it difficult to cause the base portion 11 to break in the machine direction MD during the stretching process.
  • the hook-and-loop fastener 10 of this embodiment can be obtained from the pre-fastener body.
  • the temporary base portion 41 of the pre-fastener body is stretched along the machine direction MD to make it thinner, and a stem portion 21 that is long in the machine direction MD is formed from the approximately truncated conical secondary stem portion.
  • the method, means, conditions, etc. of stretching are not particularly limited.
  • a relaxation process is performed on the hook-and-loop fastener 10 having the base portion 11 and the engaging element 20.
  • the hook-and-loop fastener 10 is conveyed between a stretching roller and a relaxing roller that rotates at a rotation speed slower than the stretching roller, with the tension applied to the hook-and-loop fastener 10 being weakened. Thereby, the shape of the hook-and-loop fastener 10 can be stabilized.
  • the hook-and-loop fastener 10 that has passed through the relaxation roller is sent out from the discharge section of the stretching device 80 to the outside. Further, the hook-and-loop fastener 10 discharged from the stretching device 80 is collected by being wound up into a roll shape, for example, by a collection roller or the like. Further, the hook-and-loop fastener 10 may be transported from the stretching device 80 toward a cutting section (not shown), cut into a predetermined width and/or length at the cutting section, and then recovered.
  • the hook-and-loop fastener 10 of this embodiment shown in FIGS. 1 to 4 is manufactured by performing the manufacturing method including the primary molding process, secondary molding process, and stretching process described above.
  • the stem portion 21 of each engaging element 20 has a first shape when the engaging element 20 is viewed from the machine direction MD, as shown in FIGS. 3 and 4. 31 and the second shape 32 when the engaging element 20 is viewed from the orthogonal direction CD have a structure in which the directionality is different from each other (i.e., the difference between the machine direction MD and the orthogonal direction CD). ing.
  • the connecting portion of the stem portion 21 connected to the base portion 11 is formed in an elliptical or substantially elliptical shape long in the machine direction MD, and the engaging element rows 26 adjacent to each other in the orthogonal direction CD Between them, the hook-and-loop fastener 10 is formed such that the forming ranges 27 of the stem portions 21 in the machine direction MD overlap with each other.
  • each engaging element 20 has a structure that is different from each other in the machine direction MD and the orthogonal direction CD. properties can be shown.
  • the peel strength of the hook-and-loop fastener 10 against a loop member the strength when the hook-and-loop fastener 10 is peeled off along the machine direction MD is defined as the MD peel strength, and the strength when the hook-and-loop fastener 10 is peeled off along the orthogonal direction CD is defined as the MD peel strength.
  • the strength at this time is defined as CD peel strength.
  • the hook-and-loop fastener 10 of this embodiment has a structure with directionality, so that the CD peel strength is greater than the MD peel strength, as described below.
  • FIGS. 8 and 9 a method for measuring the CD peel strength and MD peel strength of the hook-and-loop fastener 10 will be described with reference to FIGS. 8 and 9.
  • a method for measuring the CD peel strength of the hook and loop fastener 10 first, as shown in FIG. do. Furthermore, by adhering the cut piece 91 to a support member 92, a first test piece 93 on the hook-and-loop fastener 10 side is produced. Further, by cutting a loop member formed with a predetermined basis weight into a predetermined shape and size, a second test piece 94 to be engaged with the cut piece 91 (velcro fastener 10) of the first test piece 93 is produced. .
  • the hook-and-loop fastener 10 provided on the first test piece 93 is engaged with the second test piece 94, and the second test piece 94 is further folded back into a U-shape as shown in FIG.
  • the first test piece 93 and the second test piece 94 are each held by a pair of clampers (not shown), and then the clamper holding the first test piece 93 and the clamper holding the second test piece 94 are held together. Move them away from each other at a constant speed. As a result, a load as shown by the arrows in FIG. 9 can be gradually applied to the first test piece 93 and the second test piece 94 in the engaged state.
  • the average load for 50 mm from the start of applying the load is calculated by the integral method (however, the analysis is performed from the 3 mm position of the engagement portion to 99% of 50 mm).
  • the CD peel strength (N/cm) of the hook-and-loop fastener 10 is measured.
  • a long and narrow cut piece whose dimension in the orthogonal direction CD is longer than the dimension in the machine direction MD is cut out from the hook-and-loop fastener 10. Furthermore, a first test piece on the side of the hook-and-loop fastener 10 is produced by adhering the cut piece of the hook-and-loop fastener to a support member. Thereafter, a second test piece is prepared in the same manner as when measuring CD peel strength. Using the obtained first test piece and second test piece, the MD peel strength (N/cm) of the hook-and-loop fastener 10 is measured by performing the same measurement as when measuring the CD peel strength.
  • the claw portion 23 of the engaging element 20 protrudes along the orthogonal direction CD
  • the hook-and-loop fastener 10 is engaged with the loop member along the orthogonal direction CD
  • the loop of the loop member can be easily hooked onto the claw portion 23 of the coupling element 20.
  • the first shape 31 of the stem portion 21 when the engaging element 20 is viewed from the machine direction MD is formed to be thinner than the second shape 32 of the stem portion 21 when the engaging element 20 is viewed from the orthogonal direction CD. Therefore, each engagement element 20 is formed to be more flexible in the orthogonal direction CD than in the machine direction MD, as described above.
  • the stem portion 21 of the engagement element 20 is easily bent in the orthogonal direction CD, when the hook-and-loop fastener 10 is engaged with the loop member along the orthogonal direction CD, for example, the hook-and-loop fastener 10 is moved in the machine direction MD.
  • the engaging element 20 can be inserted more deeply between the loops of the loop member by utilizing the deflection of the stem portion 21. Therefore, each engaging element 20 can be more securely engaged with the loop member.
  • the hook-and-loop fastener 10 of this embodiment has the property that when the MD peel strength and the CD peel strength are measured and compared, the CD peel strength is higher than the MD peel strength.
  • the CD peel strength and the MD peel strength were each measured multiple times and the average value was calculated.
  • the CD peel strength was 0.53 N/cm
  • the MD peel strength was It was 0.02N/cm. Therefore, it was confirmed that the CD peel strength was 10 times or more greater than the MD peel strength.
  • even if each engaging element 20 has a different structure in the machine direction MD and the orthogonal direction CD no difference in directionality was observed in the shear strength of the hook-and-loop fastener 10.
  • the hook-and-loop fastener 10 of this embodiment which has a CD peel strength higher than the MD peel strength, is used, for example, in a disposable diaper
  • the hook-and-loop fastener 10 can be easily engaged with and peeled off from the loop member. It is preferable to attach it to the disposable diaper in an orientation along the direction CD orthogonal to (i.e., as shown in FIG. 8).
  • the hook-and-loop fastener 10 when the hook-and-loop fastener 10 is engaged with the loop member of a disposable diaper, the engagement state between the hook-and-loop fastener 10 and the loop member is stably maintained due to the high CD peel strength of the hook-and-loop fastener 10, and the hook-and-loop fastener 10 can be prevented from easily peeling off from the loop member. As a result, the attached state of the diaper can be stably maintained by the engagement between the hook-and-loop fastener 10 and the loop member.
  • the hook-and-loop fastener 10 may be pulled strongly to peel it off from the loop member, and then the hook-and-loop fastener 10 may be reengaged at an appropriate position on the loop member.
  • the hook-and-loop fastener 10 of this embodiment since the engaging element 20 is formed to be easily bent in the orthogonal direction CD as described above, the hook-and-loop fastener 10 is turned over with strong force and peeled off from the loop member.
  • the stem portion 21 in the orthogonal direction CD it is possible to make it easier to smoothly remove the loop of the loop member from the engagement element 20.
  • the engaging element 20 is formed to be easily bent in the orthogonal direction CD as described above, when the hook-and-loop fastener 10 is strongly pulled and separated from the loop member, the stem portion 21 is bent as described above, causing the loop The loop of the member can be smoothly removed from the engagement element 20. Therefore, even if the tear strength of the base portion 11 in the orthogonal direction CD is reduced due to stretching, when a large force is applied to the hook-and-loop fastener 10 engaged with the loop member, the engaging element 20 Since the engagement of the loop member is released, tearing of the base portion 11 in the orthogonal direction CD can be prevented.
  • each engaging element 20 has a different structure in the machine direction MD and the orthogonal direction CD, so that the portion of the hook-and-loop fastener 10 along the orthogonal direction CD is It has a property that the CD flexibility when curved in the vertical direction is higher than the MD flexibility when the portion of the hook-and-loop fastener 10 along the machine direction MD is curved in the vertical direction.
  • FIG. 10 shows the state of the flexibility testing device before operation.
  • FIG. 11 shows a state in which the flexibility testing device is activated and pressure is applied to the hook-and-loop fastener 10.
  • the hook-and-loop fastener 10 When measuring MD flexibility, the hook-and-loop fastener 10 is cut to produce a long test piece 101 in which the machine direction MD is longer than the orthogonal direction CD. Furthermore, when measuring CD flexibility, the hook-and-loop fastener 10 is cut to produce a long test piece 101 in which the orthogonal direction CD is longer than the machine direction MD.
  • a loop portion 102 is formed in the test piece 101 by bending the obtained test piece 101 into a loop shape in the front and back directions of the base portion 11 near the center in the length direction of the test piece 101. At this time, the test piece 101 is bent so that the engaging element 20 of the hook-and-loop fastener 10 is disposed on the inner peripheral side of the loop portion 102 . Furthermore, an overlapping portion 103 is formed by overlapping both lengthwise ends of the test piece 101 with the loop portion 102 formed thereon. In this case, the test piece 101 is bent such that the length of the loop portion 102 is 100 mm or more, and the length of the overlap portion 103 is 20 mm or more, for example.
  • the flexibility testing device includes a moving member 104 that moves up and down, a presser 106 that is attached to the moving member 104 and pressurizes the loop portion 102 of the test piece 101, and a clamp 107 that fixes the overlapped portion 103 of the test piece 101. and a load cell 105 that is attached to the clamp 107 and converts the load into an electrical signal.
  • the clamp 107 supports the test piece 101 by holding the overlapped part 103 of the test piece 101 in such a way that the loop part 102 of the test piece 101 protrudes toward the presser 106 .
  • the moving member 104 is moved upward.
  • the presser 106 also moves upward, so that the presser 106 presses the loop portion 102 of the test piece 101, as shown in FIG.
  • the load cell 105 measures the maximum load within the moving range.
  • Such maximum load measurements are performed multiple times each for the test piece 101 that has a long machine direction MD and the test piece 101 that has a long orthogonal direction CD, and the average value is determined as MD flexibility and CD flexibility. Ta. Note that the smaller this average value is, the more excellent the flexibility of the hook-and-loop fastener 10 is.
  • the connecting portion connected to the base portion 11 has an elliptical or substantially elliptical shape that is long in the machine direction MD. Further, the formation ranges 27 of the stem portions 21 of each engaging element 20 in the machine direction MD overlap between adjacent engaging element rows 26 in the orthogonal direction CD. For this reason, the hook-and-loop fastener 10 of the present embodiment has a property in which the CD flexibility shows a smaller value than the MD flexibility when the MD flexibility and CD flexibility are measured and compared. It has a property that the flexibility is better in the orthogonal direction CD than in the machine direction MD.
  • the MD flexibility showed a value of 0.07, and the CD flexibility was 0.05, which is smaller than the MD flexibility. It was confirmed that the value was shown.
  • the hook-and-loop fastener 10 is designed so that the engagement and peeling with respect to the loop member are perpendicular to the hook-and-loop fastener 10.
  • it is attached to the disposable diaper in an orientation carried out along the direction CD.
  • the hook-and-loop fastener 10 is engaged with the loop member of the disposable diaper, and when the hook-and-loop fastener 10 is peeled off from the loop member, the hook-and-loop fastener 10 is easily bent in the front and back directions (vertical direction) of the base portion 11. , the ease of handling of the hook-and-loop fastener 10 can be improved, making it easier to attach and detach the disposable diaper.
  • the base portion 11 in the orthogonal direction CD is reduced due to stretching, when a large force is applied to the base portion 11, the base portion 11 is bent in the front-back direction (vertical direction). It is also possible to prevent the base portion 11 of the CD from being torn.
  • the MD flexibility value of the hook-and-loop fastener 10 is large, it is possible to prevent the hook-and-loop fastener 10 from being rolled up in the MD direction due to rubbing between clothes and disposable diapers, for example, when picking up a baby or taking off clothes. can.
  • the secondary molded body in the embodiment described above is produced by performing a primary molding process using the molding device 60 and a secondary molding process using the heating press device 70.
  • the method and means for forming the molded object to be subjected to stretching processing there are no particular limitations on the method and means for forming the molded object to be subjected to stretching processing.
  • the molded body to be stretched may be directly molded by performing the molding process using an apparatus.

Landscapes

  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)

Abstract

La présente invention concerne un élément de fixation de surface (10) comprenant une partie de base (11) et une pluralité d'éléments de mise en prise (20) formés d'un seul tenant avec la partie de base (11), dans lequel : lorsque les éléments de mise en prise (20) sont vus depuis une direction machine (MD), une moitié inférieure d'une partie tige (21) a une première forme (31) dans laquelle une surface externe (21a) est formée avec une forme droite ou une forme sensiblement droite ; et lorsque les éléments de mise en prise (20) sont vus depuis une direction orthogonale (CD), la moitié inférieure de la partie tige (21) a une seconde forme (32) dans laquelle la surface externe (21a) comprend une partie qui est incurvée vers une surface supérieure de la partie de base (11). Il est ainsi possible de fournir un élément de fixation de surface (10) qui présente différentes structures et/ou propriétés entre la direction machine et la direction orthogonale.
PCT/JP2023/022659 2022-06-22 2023-06-19 Élément de fixation de surface et dispositif de moulage WO2023248990A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-100526 2022-06-22
JP2022100526 2022-06-22

Publications (1)

Publication Number Publication Date
WO2023248990A1 true WO2023248990A1 (fr) 2023-12-28

Family

ID=89380006

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/022659 WO2023248990A1 (fr) 2022-06-22 2023-06-19 Élément de fixation de surface et dispositif de moulage

Country Status (1)

Country Link
WO (1) WO2023248990A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005508678A (ja) * 2001-06-04 2005-04-07 ベルクロ インダストリーズ ビー ヴィッ 不織布等のループと係合可能な締結具、その製造方法および製造機
WO2020012537A1 (fr) * 2018-07-09 2020-01-16 Ykk株式会社 Fermeture à surface moulée

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005508678A (ja) * 2001-06-04 2005-04-07 ベルクロ インダストリーズ ビー ヴィッ 不織布等のループと係合可能な締結具、その製造方法および製造機
WO2020012537A1 (fr) * 2018-07-09 2020-01-16 Ykk株式会社 Fermeture à surface moulée

Similar Documents

Publication Publication Date Title
CN114391699B (zh) 成形面连接件的制造方法
TWI626902B (zh) 成形面扣結件之製造方法及成形裝置
KR0131587B1 (ko) 재고정 가능한 기계적 체결 시스템 및 그 제조방법
KR100265084B1 (ko) 프롬을 구비한 고정재료 및 그 제조방법
US5058247A (en) Mechanical fastening prong
EP1759606B1 (fr) Produit de prefrome pour une fermeture à crochets
JP2003526462A (ja) 伸縮可能な締結具
TWI581945B (zh) 結構化表面之製造方法及其物件
JPH1156413A (ja) 一体成形面ファスナー
NZ238747A (en) Prong for re-closable fastener: formed by molten material deposited onto a substrate at various relative velocities of substrate and material
TWI615108B (zh) 成形面扣結件及其製造方法、以及具備成形面扣結件之物品
WO2023248990A1 (fr) Élément de fixation de surface et dispositif de moulage
CN112955049A (zh) 成形面连接件的制造方法和成形面连接件
JP5014314B2 (ja) 面ファスナーにおけるフック片の製造方法及びフック片
WO2023228329A1 (fr) Procédé de fabrication d'un élément de fixation à boucles et crochets, élément de fixation à boucles et crochets, et dispositif de moulage
WO2023095251A1 (fr) Procédé de fabrication d'élément de fixation à crochets et boucles et élément de fixation à crochets et boucles
WO2022259539A1 (fr) Fermeture auto-agrippante
TW202005567A (zh) 成形面扣結件
WO2023145018A1 (fr) Procédé de production d'élément de fixation à boucles et crochets
KR0131600B1 (ko) 기계적인 체결 프롱
JP2020028381A (ja) 成形面ファスナーの製造方法及び成形装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23827173

Country of ref document: EP

Kind code of ref document: A1