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
  • A44B18/0003—Fastener constructions
  • A44B18/0015—Male or hook elements
• • 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
  • A44B18/0023—Woven or knitted fasteners
  • A44B18/0034—Female or loop elements
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/20—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting articles of particular configuration
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2501/00—Wearing apparel
  • D10B2501/06—Details of garments
  • D10B2501/063—Fasteners
  • D10B2501/0632—Fasteners of the touch-and-close type

Definitions

• DE 102 40 986 B3 discloses a sheet-like adhesive fastener part for an adhesive fastener, in which corresponding fastener elements can be detachably engaged with one another, with a basic structure with a thread system of warp threads and weft threads and with at least one functional thread that partially penetrates the base fabric and which forms the closure elements.
• the respective functional thread is cut open at the point where a loop is formed, resulting in a fastener hook or due to the fact that thermal energy input - provided that the functional thread consists of a plastic material - forms the severed ends of the fastener elements in the form of mushroom-like fastener heads
• the known closure parts or hooking elements with the associated fastening devices form high-strength system connections with one another, which can be separated again at any time if necessary with correspondingly large actuating forces to be applied by hand in the sense of a releasable Kletten® adhesive closure are.
• specially coordinated surfaces and individual components are required, which leads to correspondingly high production costs.
• the mushroom-like closure heads produced by means of the thermal energy input method protrude relatively far at the edge in the radial direction over an associated stem with which the respective closure head is connected to the basic structure in the form of the basic fabric at an axial distance.
• high adhesive strength values are promised if a closure head in this respect comes into interlocking engagement with another mushroom-like closure head of an additional adhesive closure part to form the adhesive closure or with a corresponding loop material of the relevant additional closure part.
• the invention is therefore based on the task of creating a method for producing a touch-and-close fastener part that can be connected to other fastener parts to form a touch-and-close fastener, with high shear strengths being to be achieved.
• a pertinent task is solved by a method with the features of patent claim 1 in its entirety.
• the method according to the invention for producing a touch-and-close fastener part is characterized by at least the following steps: Manufacture of a basic structure from a thread system that has individual loops that consist at least partially of polyamide or polyester plastic material,
• the polyamide and polyester fibers used in the manufacturing process are high-strength and have a high degree of rigidity, so that the required hooking and peel strength forces can be easily derived from the respective hooking element in its basic structure, also as part of a miniaturized design for each of the hooking element. Furthermore, the plastic materials used have good abrasion resistance and wear resistance; even after prolonged use as part of an overall adhesive fastener that can be opened and closed again and again.
• the respective basic structure has a protruding loop material, after which the head parts with their desired convex and concave surface shapes are created after the separation and heating or scorching.
• the respective loop in a Height between a lower area and an upper area, starting from the basic structure in a straight line and in a definable cutting plane, preferably running parallel to the basic structure, is cut through, for example in a range between 30% and 90%, particularly preferably in a range between 50 and 80% of the corresponding crest height of the loop minus the respective thread diameter.
• This shape results in stems of different lengths measured from the basic structure to the beginning of the respective head part, so that very different structures of closure parts can be generated with just one manufacturing II process.
• a symmetrical head shape is formed by subsequent heating in the straight cut through an area in which the fiber of a loop has a slight curvature up to the arcuate transition, and through a Area in which the fiber of the loop is more strongly curved in the direction of the arched transition, resulting in an asymmetrical head shape being formed by subsequent heating.
• an asymmetrical shape of the head in the direction of the more curved arc transition can achieve a preferred direction for closing and opening an adhesive fastener.
• the rectilinear cut protrudes as a preform with a loop end in the form of a cylindrical stem, and for obtaining an asymmetrical head shape as a preform, a stem with an obliquely inclined and opposite the stem protrudes - the head surface is generated, which, starting from its overhang with a concave hooking surface, merges into the cylindrical stem.
• the volume of material stored in the handle is sufficient for the expression of the required head shape, whether in the context of a symmetrical or an asymmetrical structure.
• the axial length of the respective preform is shortened in the direction of the pertinent end shape by heating to form the respective head shape.
• the pertinent shortening during the molding process results in a more even and compacted course of material within the stem for each hooking element, which leads to improved rigidity values.
• the curvature of the convex upper side is the same or substantially the same is to the curvature of the concave hooking surface for a single head shape.
• a circular surface is formed in plan view for the symmetrical head shape and an elongated surface, in particular in the form of an ellipse, is formed by heating in the case of the asymmetrical head shape in plan view. While the circular surface as a head shape that forms the linear transition to the extent opens up a uniform hooking possibility in all directions, the elliptical shape defines a preferred direction with improved hooking for the ellipse parts protruding over the stem.
• the invention also relates to a touch-and-close fastener part, in particular produced using a method as presented above, which is characterized in that it consists of a large number of interlocking elements made of a polyamide or polyester plastic material which are spaced apart from one another and each have a handle and a head part provided by a basic structure formed from a thread system protruding to one side as part of individual loops that have been cut open, and that the head part has a head shape with a convex upper side which merges into a concave hooking surface at the point of a linear transition , which flows seamlessly into the adjoining stem.
• touch-and-close fastener parts can be made available in large quantities in a cost-effective manner.
• such a touch-and-close fastener part can be used in the area of so-called floor group textiles, for example for fixing a floor mat provided with corresponding touch-and-close fastener parts in the area of the interior of motor vehicles.
• the floor mat is securely fastened to the vehicle floor and can be easily removed from the vehicle floor for cleaning or replacement and reattached if necessary to prevent it from slipping.
• the ratio of the diameter D at the point of the linear transition between the convex head shape and the concave hooking surface to the diameter d of the stem is ⁇ 2.5, preferably ⁇ 2, particularly preferably ⁇ 1. 8 is.
• the touch-and-close fastener part has a good ability to penetrate while at the same time having a high adhesion effect in relation to associated touch-and-close fastener parts of an overall touch-and-close fastener due to the inherent rigidity of the hooking element.
• the method according to the invention for producing a touch-and-close fastener part is explained in more detail below using exemplary embodiments of such a touch-and-close fastener part. In this case, in principle and not to scale representation show the
• Figure 1 shows a detail of a side view of a
• FIGS. 2 to 5 show the individual production steps for obtaining a touch-and-close fastener part according to FIG. 1 in a greatly simplified representation
• FIG. 1 shows a detail of a touch-and-close fastener part consisting of a basic structure 10 made from a thread system that has individual loops 12, such as are shown in FIGS. 2 and 6 for an individual hooking element 26 as an example.
• the individual loops 12 consist of a polyamide or polyester plastic material.
• the relevant loops 12 are cut open along a cutting or cutting line 14 which runs parallel to the basic structure 10 in the given case. However, it is also possible here to select a different cutting plane (not shown) that is inclined on all sides.
• the severed loop ends 16 are heated with a predeterminable temperature and with a predeterminable heating time flames under the surface tension of the melted or softened plastic material, a head shape 18 is formed as a thickening at the respective loop end 16, as shown in FIGS. 4 and 8.
• a head shape 18 is formed as a thickening at the respective loop end 16, as shown in FIGS. 4 and 8.
• the handles 20 partially shown in FIGS. 3 and 7 in the form of the loop ends 16 are then, which is not shown in detail, heated from above above the softening temperature of the plastic material, with a configuration according to FIG. 3 resulting in a head shape 18 or head part 4 and 5 and at the loop end 16 according to FIG. 7 a head shape 18 or head part according to FIGS. 8 and 9, with FIG. 5 showing a top view of the head shape 18 according to FIG. 4 and FIG elliptical configuration, the top view of the head shape 18 according to FIG.
• Both head shapes 18 according to Figures 4 and 8 have a convex upper side 22 and a circumferential concave hooking surface 24 adjacent to the side Representation according to FIG. 5 is circular or, according to the representation according to FIG. 9, is embodied elliptically for the hooking element 26 according to FIG. All hooking elements 26 are formed in one piece and the individual head shapes 18 merge seamlessly into the handles 20 or into the loop ends 16.
• the basic structure 10 is formed from a fabric 30 made of warp and weft threads, into which individual pile threads 32 are woven to form the loops 12 .
• a fabric structure for a touch-and-close fastener part is shown by way of example in DE 102 40 986 B3 and is known for multifilament systems from DE 10 2007 003 287 A1.
• the number of individual interlocking elements 26 on the basic structure 10 can be 100 to 200 pieces/cm 2 with a respective handle diameter d for an interlocking element 26 in the range from 150 to 250 mm.
• the height of the respective hooking element 26 calculated from the foot-side base on the basic structure 10 to the outermost end of the head part can be 1200 to 2200 mm and the dimensions of the head part diameter D at the point of its greatest widening can be in the range between 200 to 400 mm.
• the fabric 30 shown in FIG. 1 can also consist of a knitted fabric with a thread system in which the individual loops 12 are always connected in sequence. Furthermore, there is the possibility of creating a knitted fabric with a large number of threads running parallel to one another, which then form the loops 12 when pushed into one another. Knitted and warp-knitted fabrics in this regard are common in the field of producing touch-and-close fastener parts, so that they will not be discussed in any more detail at this point.
• the respective loop 12 is straight at a height between a lower area and an upper area, starting from the respective basic structure 10 and in a definable sectional plane, here preferably running parallel to the basic structure 10 intersected along the line 14, for example in one
• the cutting or cutting line 14 for the embodiment according to FIG. 2 runs approximately halfway through the loop 12 and in the embodiment according to FIG. 6 approximately in the range of 80% of said crest height minus the thread diameter.
• FIGS. 3 and 7 in the straight section shown in FIGS. 2 and 6 there is a region in which the fiber of a loop 12 up to the arcuate transition 15 has a slight curvature due to subsequent heating a symmetrical head shape according to the illustration in FIG. 4 is formed, or in the case of a section through an area in which the fiber of the loop is more strongly curved in the direction of the arcuate transition 17, an asymmetrical head shape 18 is formed as a result of the subsequent heating mentioned, according to the illustration according to FIGS. 8 and 9, with an already asymmetrical intermediate transitional position for the loop end 16 according to the representation according to FIG. 7.
• a handle 20 with a head surface that is inclined at an angle and projects beyond the handle 20 is produced as a preform, as shown in the illustration after the intermediate step in FIG concave hooking surface 24 in the otherwise foot-side zy-cylindrical stem 20 merges.
• the concave interlocking surface 24 is more pronounced on the right side than on the left side, as viewed in the direction of the figures. Overall, this results in an asymmetrical elliptical transition surface between the otherwise cylindrical stem 20 and the line-shaped transition 28 on the head mold 18.
• the axial length of the respective preform is greater than the later length in which the pertinent final form according to FIGS. 4 and 8 is shortened by heating the end of the stem part to form the respective head form 18 It has proven particularly favorable if the curvature of the convex upper side 22 corresponds to the curvature of the concave hooking surface 24, in the embodiment according to FIG.
• a touch-and-close fastener part is realized with slender stems 20 with adjoining small-sized head shapes 18, so that the fastener part according to the invention can be incorporated very well into other fastener materials.
• the fastening device shown achieves high shear strength with the assignable floor group textile, so that unwanted slipping is avoided in any case.
• the head geometries which are kept small according to the invention, lead to sufficient adhesion and peel strength values to be able to ensure sufficiently secure anchoring of the floor mat to the floor group textile without the head parts destroying the floor group textile by roughening processes. This has no equivalent in the prior art.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=82100302

Family Applications (1)

Country Status (6)

Family Cites Families (8)

• 2021
  • 2021-06-26 DE DE102021003311.6A patent/DE102021003311A1/de active Pending
• 2022
  • 2022-06-01 EP EP22731230.3A patent/EP4358788A1/de active Pending
  • 2022-06-01 WO PCT/EP2022/064913 patent/WO2022268465A1/de active Application Filing
  • 2022-06-01 CN CN202280045513.7A patent/CN117580482A/zh active Pending
  • 2022-06-22 TW TW111123203A patent/TWI845969B/zh active
• 2023
  • 2023-12-19 US US18/545,169 patent/US20240115013A1/en active Pending

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