Abstract: A fastener which allows to distinguish a genuine fastener from a forged one. An identification yarn containing substance with different optical reactions to irradiation of visible light and to irradiation of infrared rays of a specific wavelength is disposed at a specified position in the tape which is a component of the fastener. As a result, discrimination between genuine and false fasteners can be done safely without damaging the human health.

Abstract: The present invention provides a surface fastener wherein necessary engaging strength is maintained for a long term, the surface fastener is flexible and has a favorable touch without prickly feeling even when male engaging elements formed of fibers are employed, and strange peeling noise is not generated. The surface fastener includes at least a large number of male engaging elements planted on a foundation cloth which is a woven or knitted fabric or a non-woven fabric and is formed of fibers, the surface fastener being engaged with and disengaged from a mating surface fastener.

Abstract: Improved Fasteners of the Slidingly Engagable type are provided in uni-directional and multi-directional orientations, in single and double-sided configurations, and in a range of designs which also include provisions for attaching certain embodiments of such fasteners to a substrate material. A method of economically producing such fasteners and products incorporating such fasteners in diverse materials by utilizing an apparatus which includes a set of interengaging dies is also provided.

Abstract: A new self-mating mechanical fastener is disclosed, which comprises a base sheet and a multiplicity of parallel, narrowly spaced, elastically deformable ribs projecting from the base sheet. The ribs comprise a stem portion attached to and substantially upright from the base sheet and at least one flange attached to each side of the stem portion and spaced from the base sheet. At least the outer portions of the flanges desirably project toward the base sheet. The cross-sectional profile formed by the ribs is substantially uniform over the length of the ribs, but in the direction transverse to the ribs has a regularly repeated deviation from the profile that would be formed by a full population of equally spaced, identical, undivided, symmetric ribs.

Abstract: A woven fastener product includes an array of hook elements and an array of loop elements that extend from the surface of different respective regions of a common fabric base. The arrays are formed by warp yarns, the arrays being separated in the warp direction of the fabric base. To form a self-engaged fastening, the fastener product is conformed so that the hook elements overlie the loop elements. Monofilament loops are shown sized and located to provide pin-receiving mounting sleeves as part of the woven structure.

Abstract: A detachable closure includes separable burr-type elements which, at surfaces to be joined, have interlocking elements which mutually interlock during joining of the burr-type elements and hold the burr-type elements together. The interlocking elements are made of a material which carries out a deformation under the influence of heat, electromagnetic radiation, and/or a magnetic field.

Abstract: A fastening device for a sports article including two portions adapted to be brought closer together. This device which serves to tighten a foot, a wrist, but also a content can be used on an article of footwear, a garment, a backpack, etc. The device includes a strap, one end of which is connected to a first portion of the sports article, which passes in a return connected to a second portion of the sports article. The strap defines a portion between the end of the strap and the return. The device also includes a blocking mechanism, fixed to a second end of the strap, which cooperates with the portion of the strap for the fastening. The blocking mechanism is slidably mounted on the portion of the strap.

Abstract: A bi-stable hook component of a touch fastener can bend into, and remain in, a stable concave position. Another stable position enables initial engagement with a mating component (e.g., a loop component). The concave position applies engagement-enhancing tension to the engaged loops, and in some cases forces end portions of the hooks into close proximity with one another to secure the fastening and to produce a curved touch fastener that, as engaged, can better conform to an underlying curved surface, such as the contour of a wearer's body. Absorbent articles having such a bi-stable fastening system are also disclosed.

Abstract: An easy-to-grip diaper fastener tab has an array of hook-shaped fastener elements arranged in parallel rows, each fastener element including a stem and a crook extending from the stem in a predetermined direction to a distal tip. The array includes a plurality of rows of fastener elements arranged such that, in each row, all of the crooks face in the same direction and parallel to the direction of the row, with the crooks of adjacent rows facing in opposite directions. The longitudinal spacing between opposing tips of adjacent hooks of adjacent rows is greater in a first portion of the array than the longitudinal spacing between opposing tips of adjacent hooks of adjacent rows in a second portion of the array, such that the crooks of the hooks of the first portion are more exposed for engaging loops than the crooks of the hooks of the second portion. Methods and molds for forming such arrays are also provided.

Abstract: In an adhering closure element with a carrier strip (10) with meshing parts (12) arranged on it, and with a cover strip (20) covering the carrier strip (10) on the side turned away from the meshing parts (12), which is wider than the carrier strip (10), the two free side edge areas (21) of the cover strip (20) are folded over themselves, in the direction of the carrier strip (10) along a fold line (29), which runs in the longitudinal direction, so that the end edges (31) of the free side edge areas (21) of the cover strip (20) face the longitudinal edges (33) of the carrier strip (10).

Abstract: A selectively releasable, interengaging fastening system that may be used for a variety of articles such as, for example, shoes, garments, disposable absorbent products such as disposable diapers, sanitary napkins, incontinence products and the like. The fastening system includes a first fastener component that can constitute at least a first portion of an article. The first fastener component includes an engagement section having a plurality of substantially non-isotropic engagement members such that the engagement section has an axis of substantially maximal engagement. The fastening system also includes a cooperating fastener component that may constitute at least a second portion of an article such that the first and second portions of the article are capable of being joined by movement of the respective components together generally along an attachment direction into an overlapping and interengaging configuration.

Abstract: A hook fastener member having rows of molded hook-shaped fastener elements that lie in planes aligned with the rows, with generally planar plate portions at the outermost ends of at least some of the fastener elements, the plate portions lying generally parallel to the base of the fastener member. The plate portions can enhance engagement of the hook fastener members with mating loop fastener members, particularly with low loft non-woven loop fastener members. A method of making fastener members is provided. Molten resin is extruded and applied to a molding roller, creating preforms. The outermost portions of at least some of the preforms are flattened, thereby forming generally plate shaped portions. Disposable absorbent garments advantageously incorporate the hook fastener members.

Abstract: The invention relates to an arrangement and a method for fastening panel-like elements to a vehicle. The arrangement incorporates a first part of a velcro® fastening the latter consisting of a hook part and a felt part which is attached to the panel element, and a second part of the velcro fastening which is attached to the part of the vehicle which is intended to support the panel element. The portion of the surface of the panel element where the first part of the velcro® fastening is arranged is situated centrally to, but at a predetermined distance from, the portion of the surface of the vehicle part where the second part of the velcro® fastening is arranged. In fastening a panel element, e.g. a wearing layer, to a vehicle, at least a first part of the velcro® fastening is attached to the panel element before the latter is placed in the vehicle.

Abstract: A golf glove saver device for drying out a golf glove wet from perspiration while playing on a golf course. The planar device is flexible and elongate, being foldable about a medial line to define first and second portions, each portion containing a magnet so that the device can be looped about a pocket, waistband, belt, or other article of clothing and secured by attraction of the magnets. A patch of hook and loop fastening material is attached to the outer face of the golf saver device. The golf glove is attachable to the hook and loop fastening material.

Abstract: A sanitary, absorbent article includes a hooks and loops type fastener for releasably attaching a first and a second part of the article to each other, wherein the first part is overlapping the second part when the parts are attached to each other, with a hooks member affixed to said first part of the article and a loops member affixed to the second part of the article. Each member has a base portion having a bottom surface affixed to the first or second part of the article and an opposite top surface containing hooks elements and loops elements, respectively. The fastener can include a first end region distal to the overlapping edge of the first part, in which the engagement force between the hooks and loops element of the members is reduced.

Abstract: A laminated composite suitable for use in medical products such as tapes and wraps. The composite includes, for example, a first nonwoven fiber layer, an elastic layer, a melt blown adhesive fiber layer, and a second nonwoven fiber layer. A scrim layer serves as a deadstop, or stretch limit, to prevent over stretching. The non-woven fiber layer(s) and/or the scrim layer form suitable loops for a hook and loop fastening system. The scrim layer in some embodiments is employed to make the composite finger tearable. The melt blown adhesive layer, nonwoven web layer and elastic layer form a breathable, porous elastic composite. Methods of manufacturing the composite are also disclosed.

Abstract: An elastic web of material has a multiplicity of stems extending from at least one side of the web. The web includes a first continuous layer of elastic material having a first side and a second side and a second layer of material. The second layer of material has a first side which faces the first side of the first layer and a second side from which the stems extend. The first and second layers of material are joined together. The second layer of material can be formed of thermoplastic material or melt processable polymeric material. The first and second layers of material are melt formed. They are joined by coextrusion or lamination to form a multiple layer sheet on which a multiplicity of stems are formed on at least the second layer by a process such as embossing the stems into the heated web using a patterned roll or mold.

Abstract: A garment or undergarment, such as an absorbent article, having a first region, a second region opposed to the first region and a garment material extending through at least a portion of the first region. The garment material has a surface wherein at least a portion of the surface has been mechanically modified to form a plurality of surface protrusions integrally from the garment material. The garment further includes a landing zone having a plurality of fibrous loops located at least partially in the second waist region and adapted to engage with the surface protrusions of the first region to provide a closure mechanism for holding the first region and the second region in an overlapping configuration.

Abstract: A method and apparatus for mounting a motherboard to a computer chassis wherein the motherboard includes a first integrated fastener member and the chassis includes a second integrated fastener member. The motherboard is mounted to the chassis by mating the first fastener member to the second fastener member.

Abstract: The invention is a hook fastener strip (10), having magnetically attractable wires (13a,b,c,&d) which are located between, and retained by, hook members (11) on the front face of the fastener strip (10). Each hook member (11) is comprised of a shaft (14) and a split-mushroom-shaped head (15). The outer edges of head (15) protrude beyond the sides of shaft (14), and the undersides of the outer edges form ledges (16a&b) which serve to retain the magnetically attractable wires (13a,b,c,&d) within the hook layer of the fastener strip (10). The magnetically attractable wires (13a,b,c,&d) within the fastener strip allow it to be secured to a correspondingly magnetically attractive object.

Abstract: A fastening body having a flat substrate made of synthetic resin. The flat substrate has two synthetic resin layers having different molding shrinkage rates. With the two synthetic resin layers, the flat substrate can have a desired curvature in width direction. The fastening body is fixed by engagement in each of engaging groove portions of a mounting body. The mounting body has a substantially U-shaped section, formed along both side edges in a width direction, so that openings formed by the U-shaped section oppose each other.

Abstract: In a strip-shaped surface fastener, fence portions, each of which periphery is blocked, integrally stand on a surface of a flat base portion made of synthetic resin. The fence portions may be formed of foam members and bonded to the surface of the flat base portion. Then, male type engaging elements are integrally molded inside each of the fence portions. Alternatively, a woven or knitted male type, female type or male-and-female mixture type surface fastener member, or a male type surface fastener member made of synthetic resin may be pasted or bonded inside each of the fence portions. An attaching portion, in which no engaging elements are disposed, are integrally formed on an outer periphery of each of the fence portions. Therefore, it is possible to prevent foam resin material from penetrating an interior of each of the fence portions during an embedding operation and to effectively embed the surface fastener in a cushion body of a foam resin molding type.

Abstract: The mold-in fastening member, that can be molded into a resin article, of the present invention comprises (a) a substrate having a front surface and a back surface; (b) a plurality of engaging elements provided on the front surface; (c) a plurality of anchoring elements provided on the back surface, the anchoring elements being embedded into the resin article to fix the mold-in fastening member thereto; (d) a ferrite-containing layer formed on the front surface; (e) marginal portions continuously extending along respective lengthwise edges of the substrate; and (f) grooves formed on the substrate, which extend along the respective marginal portions to render the marginal portions easily bending relative to the substrate.

Abstract: A method and apparatus for maintaining a fastening tab (20) of a hook and loop fastener system in a storage position on an article, such as a disposable diaper (10). The fastening tab (20) has a first end portion (122) for permanent attachment to the article and a distal end portion (126) provided with projecting hook members (30). The distal end portion (126), in a ready position of the fastening tab, stands free from the article. The distal end portion, in the storage position, contacts a surface of the article. The method includes the steps of attaching the first end portion (122) of the fastening tab (20) to the article, and folding the distal end portion (126) of the fastening tab over the first end portion (122) of the tab such that the hook members (30) contact the surface of the article.

Abstract: A method of providing complementary fastener strips for securing one item to another item is disclosed. A dispenser allows for complementary fastener strips in a prebound configuration, to be dispensed and used in applications such as the manufacture of outdoor furniture cushions. The invention facilitates the efficient and cost effective manufacture of articles which utilize multiple strips of complementary fastener strips.

Abstract: Methods of forming mold cavities suitable for hook and loop fastening are disclosed, along with effective hook construction and hook and loop fastener products that have an ultrathin cross-section. Photochemical techniques are employed to form plates that define hook-form mold cavities, and, alternatively, chemical etching is employed following preforming of the cavities and machining. Hooks having three-dimensional tapers with enhanced loop engaging characteristics are disclosed. By utilization of special surface finishes and tolerances, hook fasteners, having ultrathin cross-sections are realized, that pave the way for practical use of touch fasteners in a wide range of new areas.

Abstract: A fastener assembly is disclosed which includes a first fastener strip having on at least one side a first fastening surface. Also provided is a second fastener strip having on at least one side a second fastening surface that is complementary to the first fastening surface. The first fastener strip overlies the second fastening surface of the second fastener strip with the first fastening surface not facing the second fastening surface. The first and second fastener strips are releasably connected.

Abstract: A synthetic resin opening and closing press fastener comprises a front side flat plate portion and a rear side flat plate portion which are attached to the end edges of a flat plate shaped attached body. One end of these portions are connected by means of a connecting portion that is a positioning portion of the end edge of the attached body, and has a number of male engaging elements of a surface fastener on the rear face of the rear side flat plate portion. In order to attach this opening and closing press fastener to the attached body, the fastener attaching end edge of the attached body is inserted from an open end of the front and rear side flat plate portions of the press fastener. When the above end edge abuts against the connecting portion, both of the flat plate portions are connected to each other via the attached body by means of synthetic resin pin members having at least engaging heads at one end.

Abstract: A surface fastener having a first substrate sheet having on its front surface hook-shaped engaging elements and on its rear surface a low-adhesion adhesive double coated tape to an outer surface of which a backing sheet is adhered, and a second substrate sheet having on its front surface loop-shaped engaging elements and on its rear surface an adhesive layer to an outer surface of which a peel paper is adhered. For attaching the surface fastener to a paper diaper, the adhesive layer of the second substrate sheet is adhered to a front covering portion of the diaper, while the adhesive double coated tape of the first substrate sheet is adhered to an attachment strip of a hip covering portion of the diaper after the backing sheet is peeled off.

Abstract: A fastening system for releasably securing a diaper provides both mechanical and adhesive or cohesive securement. Tab members comprise a facestock layer, a contact layer of adhesive or cohesive overlying at least a portion of the facestock layer, and mechanical fastening elements projecting from at least a portion of the contact layer. The facestock layer includes extensible and substantially nonextensible polymeric portions. A landing member includes complementary mechanical fastening elements and a contact surface or cohesive for engagement with the tab adhesive or cohesive. A method is also disclosed for making the fastening system.

Abstract: A molded surface fastener has no stagger between the once engaged engaging elements and has high engagement force so as to strongly prevent the release of the engaging elements, whereby, it is possible to smoothly press and joint the molded surface fasteners made of a synthetic resin each other.

Abstract: A strip of hook and loop fastening material embedded within an article having a body such as a bar of soap. In alternative embodiments, the strip has one embedded end and one free end, or alternatively both ends are embedded to form a loop serving as a handle. Preferably, the strip of hook and loop material has holes, or alternatively, the edges of the strip of hook and loop material are pinked, to increase surface area for improving retention of the strip by the body. Alternatively, the strip may have negative taper wherein the relatively wide end is embedded, or the embedded portion may form a serpentine path. Alternatively, two strips of hook and loop material, preferably overlapping, are embedded within the article. The article includes an anchoring member bearing complementary hook and loop material on one side and adhesive on the other side.

Abstract: Molten resin material is continuously extruded from an extruding hole including a plurality of engaging-element-molding portions disposed with a constant pitch in a width direction of an extruding nozzle and a substrate-molding portion with which lower ends of the engaging-element-molding portions communicate. An ascending/descending member disposed at a front face of the extruding nozzle and made of a laterally long plank ascends and descends to vertically open and close the extruding hole of the extruding nozzle. As a result of such continuous molding, a surface fastener is continuously molded in which each of plurality engaging elements has stem and an engaging extruding head projecting at least toward one side from an end of the stem standing on a surface of a flat substrate. The engaging element thus molded has a thickness, in a direction perpendicular to a projecting direction of the engaging head, gradually increasing from a top portion of the engaging head to a base end of the stem.

Abstract: A slip control article including a backing layer having a first surface with an array of at least 100 upstanding stems per square inch and a second surface. At least a portion of the upstanding stems is an elastomeric material and the stems have an aspect ratio of at least 1.25. The first surface has a static coefficient of friction when dry of at least 0.6 and a static coefficient of friction when wet within 20% of the static coefficient of friction when dry. The first surface has a peel strength and a tensile strength of substantially zero when engaged with another slip control article. The first surface has a relatively high shear strength when engaged with another slip control article. The high shear forces are due primarily to the frictional properties of the elastomeric materials, not a mechanical interlock of the stems, such as on a mechanical fastener.

Abstract: There is provided a hook and loop attachment means made up of a hook portion and a loop portion where the loop and/or the hook portion is convex and is underlain by a resilient material or hollow area. The hook and loop attachment means is useful in the attachment of personal care products.

Abstract: A device for securing and carrying currency, having a strap having a first side, a second side, a first end, a second end, a length, a width and a thickness; a fastening mechanism having a first element and a second element, the first element being located on the second side of the strap proximal to the second end of the strap, and the second element being located on the first side of the strap proximal to the first end of the strap; and a thumb tab secured to the strap at or near the first end of the strap and extending outwardly from the strap in the width direction and normal to the length.

Abstract: A hook fastener member having rows of molded hook-shaped fastener elements that lie in planes aligned with the rows, with generally planar plate portions at the outermost ends of at least some of the fastener elements, the plate portions lying generally parallel to the base of the fastener member. The plate portions can enhance engagement of the hook fastener members with mating loop fastener members, particularly with low loft non-woven loop fastener members. A method of making fastener members is provided. Molten resin is extruded and applied to a molding roller, creating preforms. The outermost portions of at least some of the preforms are flattened, thereby forming generally plate shaped portions. Disposable absorbent garments advantageously incorporate the hook fastener members.

Abstract: Lightweight, non-woven loop products for hook-and-loop fastening are disclosed, as are methods for making them and end products employing them. The products are non-woven webs of entangled fibers of substantial tenacity, the fibers forming both a sheet-form, bonded web body and hook-engageable, free-standing loops extending from the web body. The product is, in important cases, stretched before bonding to produce spaced-apart loop clusters extending from a very thin web of taut fibers. In important cases a binder is added to stabilize the product in its stretched condition. An example of the loop product is produced by needle-punching a batt of staple fibers in multiple needle-punching operations, applying a foamed acrylic binder, and then stretching the needled batt and curing the binder with the batt stretched. Other forming techniques are disclosed and several novel articles employing such loop products are described.

Abstract: A conduit stress relief strap, which provides improved weight and tension relief along with being an adjustable, flexible, easy to attach and detach strap. This invention is particularly adapted to provide relief to hoses, cables, and other like flexible conduit. The combination of hook and loop fasteners and strap loop devices provides greatly improved flexibility and adjustment while maintaining stress relief at the point of connection between two conduits.

Abstract: A fastening component of a separable fastener has some portion that is necessary for its fastening function, such as the hooks, the base to which the hooks are attached or a substrate that is used for another purpose, comprised of a magnetically attractive constituent. Another portion of the fastening component is comprised of a magnetically inert constituent. The fastening element may be the hook portion or the loop portion of a typical fastener. The fastening elements and the base may be unitary, or of different precursors, such as in a woven fastener component. The magnetically inert constituent may comprise a polymeric plastic or a thermoplastic elastomer. The magnetic attractant may impregnate the magnetically inert constituent, or it may coat or be coated by the magnetically inert constituent. The magnetic attractant may comprise a metal powder. The metal may be selected from the group consisting of iron powder. The magnetic attractant may be an organo-iron or a rare earth metal.

Abstract: There is disclosed a securely fitting binding band in which production thereof is easy with low cost. The binding band comprises a tightening piece and a pair of attaching pieces extending from an end portion of the tightening piece. A gap is formed between the pair of attaching pieces in which the tightening piece can be inserted. The tightening piece and attaching pieces are formed integrally by punching out a fiber surface fastener material in which a mixture of male engaging elements and female engaging elements exist on the same surface thereof.

Abstract: A flexible fabric fastener comprising a flexible and stretchable polyester and rubber material onto which Velcro®-type nylon loops or hooks are woven therethrough. The Velcro®-type hooks or loops are woven into patterned portions of the elastic base of the flexible fabric fastener. The Velcro®-type hooks and loops pattern are secured in place by a composity polyester and rubber locking thread. When applied to a compression garment or other stretch fabric, the flexible fabric fastener would be able to stretch along with the garment thereby reducing the difficulty of applying garments to a patient or any garment or product needing a closing device that self sizes.

Abstract: An adhesive body, for the production of a junction with a foam material molded body during the molding process involving foam materials, has individual adhesive elements arranged on a support strip and covered to avoid the penetration of foam material with a covering. The covering is an adhesive material, adhering to the front side of the adhesive elements and can be removed therefrom to expose the adhesive elements. The adhesive body can be used at lower cost, can be in tight junction with the foam material molded body, and can guarantee with greater certainty that no foam material gets onto the adhesive elements during the foaming.

Abstract: A pre or post-operative surgical compression garment composed of Lycra and cotton including one or more strips of flexible fabric fastener, also used for triage. The flexible fabric fastener comprises a flexible and stretchable polyester and rubber elastic material in which Velcro®-type nylon loops on the male part or hooks on the female part are woven there through. The Velcro®-type hooks or loops will cover alternative portions of the elastic base composing the elements of the flexible fabric fastener. One strip of the flexible fabric fastener is sewn with polyester and rubber thread to the underside of the top flap of the garment. Two evenly spaced parallel strips are sewn on the top of the second flap affording the opportunity for horizontal multi-sizing in one garment and vertical stretch. Each compression garment is supplied with multi-support panels for chest, back, abdomen, and inner and outer leg portions for comfort.

Abstract: An extruded hook fastener strip is created on a roll having hook forming cavities in its surface by extruding plastic material into the interface between the forming roll and a second strip carried by a backing roll. The second strip is firmly bonded to the fastener strip on that side opposite the formed hooks.

Abstract: A floor mat is disclosed which is releasably attachable to loop-pile fibers of a carpet of the carpeted floor board of a vehicle. The floor mat includes a generally planar member having a top surface, a carpet material attached and/or bonded to the top surface, a plurality of integrally formed, spaced-apart, downwardly-depending nibs, and a plurality of integrally formed, spaced-apart, downwardly-depending, carpet-engaging members interlockably engageable with the loop-pile fibers of the carpeted floor board. The planar member, and thus, the integrally formed carpet-engaging members are desirably formed from a heat curable, elastomeric or rubber-like material so that the plurality of carpet-engaging members is disengageable from the loop-pile fibers of the carpeted floor board generally without damaging the loop-pile fibers of the carpeted floor board. Also disclosed are a mold and a method for forming such a floor mat.

Abstract: A safe cord cover for securing electrical cords to looped carpeted flooring, the cover referred to by the inventor as “SAFCORD” consists of a strip of fabric material such as NYLON, CORDURA, having substantially two parallel longitudinal edges; two parallel strips of male hook latch material; each one of the strips of the hook latch material separated by a space from one another and sewn onto the strip of material having the longitudinal edges and along each of the two longitudinal edges of the strip of material; and the space between the two strips of hook latch material are without hook latch material and form a channel for accommodating electrical cords.

Abstract: An extruded hook fastener strip is created on a roll having hook forming cavities in its surface by extruding plastic material into the interface between the forming roll and a second strip carried by a backing roll. The second strip is firmly bonded to the fastener strip on that side opposite the formed hooks.

Abstract: Touch fasteners with different portions having different material properties, and methods and apparatus for making such a product. In one embodiment, the fastener includes a cross-linkable polymer, and a first portion of the fastener is cross-linked and a second portion of the fastener is not cross-linked or is cross-linked to a degree less than said first portion. In another embodiment, the fastener is made in a continuous process on a rotating mold roll having a plurality of fastener element mold cavities extending into the mold roll from its outer circumferential surface.

Abstract: An article includes a mating surface fastener portion attached to a surface. The mating surface fastener portion has a land and a plurality of tapered elements and is capable of reattachably and matingly intermeshing with a fastener portion of another article to fasten the respective articles. The fastener portions have a predetermined disengagement pressure for a given engagement pressure. The surface to which the land is attached is at least semi-rigid. The means for attaching has a compliance that is no greater than 0.381 cm. Also, the fastener portions can have a predetermined disengagement pressure for a given engagement pressure; for an engagement pressure of no more than 689,500 N/m2 the fastener portion has a disengagement pressure of at least 137,900 N/M2.