RU2149933C1 - Nonwoven fibrous material with unattached parts arranged in predetermined pattern and method for manufacture of such material - Google Patents

Abstract

FIELD: textile industry. SUBSTANCE: nonwoven material has unattached portions arranged in predetermined pattern, in which continuous attached portions define plurality of separate unattached portions. Material is fit for usage as fabric which may be fastened by "hook and loop" type fastening portions. Nonwoven material has fibrous cloth composed of separate threads or filaments. Volume density of nonwoven cloth is about 0.254 mm and surface density is about 20 g/sq.m. Fibrous cloth has continuous attached portions in its surface, which are arranged in accordance with predetermined pattern to define separate unattached portions, which are formed by applying heat or pressure to them. Area of attached portions of cloth is 25-50%. Separate threads or filaments in separate unattached portions partially project into continuous attached portions and are fixed in them. Method involves feeding cloth into space between rolls, with one of rolls having pattern on its surface and other roll having continuous surface; rotating rolls in opposite directions; fastening cloth by applying heat or pressure for forming pattern, with cloth fastening area covering 25-50%. Part of separate threads or filaments in separate portions projects into continuous attached parts and is fixed in them. This material is used for mechanical fastening system having male and female members which may be mutually connected and disconnected. Material may be embedded in disposable moisture absorbing article having layer which is in contact with user's body. EFFECT: wider range of usages, simplified manufacture method and construction, and improved quality of articles using such material. 21 cl, 6 dwg, 1 tbl, 19 ex

Description

 The present invention relates to the field of nonwoven materials and fibrous canvases and methods for their manufacture. In particular, the present invention relates to non-woven materials and fibrous webs containing continuous bonded sections spanning multiple individual, non-bonded sections with stabilized dimensions. Such non-woven materials or fibrous webs made in accordance with the present invention are suitable for use as a loop material of fasteners for mechanical fastening systems, commonly referred to as hook and loop fasteners.

State of the art
Mechanical fastening systems of this type, otherwise known as “hook and loop fasteners,” have become increasingly used in various domestic and industrial fields. Some examples of such applications include disposable, moisture-absorbing personal care products, clothing, sports equipment, and a wide variety of other diverse products. Typically, such hook and loop fasteners are used in situations where it is desirable to reconnect by fastening two or more materials or products. With these mechanical fastening systems, in many cases other conventional devices used for such re-fastening connections, such as buttons, buckles, zippers, etc., have been replaced.

 Mechanical fastening systems typically consist of two components: a male component (hook) and a female component (hinges). The component to be covered typically comprises a plurality of semi-rigid hook-shaped elements fixed or attached to the substrate. The female component typically includes an elastic lining material from which a plurality of protruding loops protrude. The hook-like elements of the hook component are designed to engage the loops of the loop material, thereby forming mechanical connections between the hook and loop elements of the two components. The action of these mechanical joints is to prevent the separation of the respective components during normal use. Such mechanical fastening systems are designed to prevent the detachment of hook and loop components when shearing forces or loads are applied, which are applied in a plane parallel to or defined by the connected surfaces of the hook and loop components, as well as tearing forces or loads. However, the application of tearing forces in a direction that is mainly perpendicular or normal to the plane defined by the joined surfaces of the hook and loop components can cause the hook elements to separate from the loop elements, for example, by breaking the loop elements and subsequently releasing the captured hook elements or by folding the elastic hook elements to such an extent that the hook elements do not release the loop elements.

 Mechanical fastening systems can be successfully used in disposable moisture-absorbing personal care products, such as disposable diapers, disposable garments, disposable incontinence products, etc. Such short-term products are usually disposable which are destroyed after a relatively short period of use (usually the duration of such periods is hours) and are not intended to be washed and reused. Therefore, it is desirable to eliminate expensive components in the design of such products. Thus, taking into account the conditions in which hook and loop components are used in such products, hook and loop components should be relatively inexpensive in terms of both the materials and the manufacturing methods of such components. On the other hand, hook and loop components must have sufficient structural integrity and elasticity to withstand the forces exerted on them during normal wear of moisture-absorbing products, in order to eliminate potentially possible difficult situations for the user, which may result from premature separation or separation hook and loop components.

 U.S. Patent No. 4,761,318 to Ott et al. Describes a fastener loop material suitable for mechanical fastening systems for short-term products. The loop fastener material disclosed in this patent includes a fibrous layer comprising a plurality of loops on a first surface adapted to be detachably connected by mating with a hook fastened portion, and a layer of thermoplastic resin adhered to the surface of the fibrous structure located opposite the first surface. Thermoplastic resin fixes the loop in the fibrous structure.

 US Pat. No. 5,032,122, issued to Noel et al., Discloses loop fastener material suitable for mechanical fastening systems for short-term products. The loop fastener material disclosed in this patent comprises an orientable material lining and a plurality of fibrous elements protrude from this lining. Fibrous elements are formed from filaments located on / and at individual points attached to the lining when the oriented lining material is in an unstabilized state with respect to its size. Fibrous elements are formed by forming corrugations from filaments between spaced fixed zones of their fastening to the lining, when the oriented material is transformed to a stable state of dimensions so that it is forced to sit down or gather along the shrinkage path. Thus, the loop material made in accordance with this patent requires the use of a lining oriented material such as elastic or elastomeric or heat-shrinkable material that undergoes transformation from a dimensionally stable state to a dimensionally unstable state and returned to it dimensionally stable condition.

US Pat. No. 5,326,612 to Gauleit discloses a fastener loop material suitable for mechanical fastening systems for short-term products. The loop fastener material disclosed in this patent comprises a fibrous web fastened to a lining. Fibrous canvas is used to receive and grab the hooks of the conjugated hook component. The fibrous canvas has a set surface density in the range of about 5-42 g / m ² , the bonding area between the fibers is less than 10% and the total bonding area in the plan is less than about 35%.

 Without denying the substance of the aforementioned patent, it should be noted that the need for improvement of loop fastener material for mechanical fastening systems, however, exists, especially when such materials are used in disposable moisture-absorbing personal care products. The non-woven loop material with non-fastened portions arranged in accordance with a specific pattern for fasteners made in accordance with the present invention is soft and fabric-like and therefore aesthetically pleasing in terms of appearance and touch. A non-woven material with non-bonded areas arranged in accordance with a specific pattern, made in accordance with the present invention, has significant structural coherence and dimensional stability, so that, unlike the previously known loop materials, the need for attachment to a carrier substrate or backing layer, for fixing fibers or filaments in a nonwoven fabric, is excluded. Non-woven fabric with non-bonded areas arranged in accordance with a specific pattern, made in accordance with the present invention, is relatively inexpensive to manufacture, especially in comparison with conventional loop materials formed by knitting, warp knitting, weaving and the like, but shows satisfactory comparable and / or higher resistance to peeling and shearing forces, in comparison with conventional loop fastener materials when used with ommercheski supplied knitting materials for fasteners.

SUMMARY OF THE INVENTION
The present invention relates to a nonwoven material containing non-bonded areas located in accordance with a specific pattern, containing:
a first fibrous canvas having a fibrous structure consisting of individual fibers or filaments, and
a specific bulk of at least about 0.254 mm and a surface density of at least about 20 g / m ² ; and
having on its surface continuous bonded sections located in accordance with a certain pattern, defining many individual loose bonds formed by applying heat and pressure, while the bonded area of the fibrous canvas is about 25-50%, and
said individual fibers or filaments in separate non-bonded sections protrude at least partially in / and are fixed in continuous bonded sections.

 Fibrous canvas may have a bonded area of about 36-50%.

 The nonwoven material may have a shear strength of at least about 600 g and a tear resistance of at least 50 g.

 Fibrous canvas may contain filaments formed from a polymer melt, or staple fibers. The fibrous canvas may contain multicomponent filaments formed from a polymer melt.

 The nonwoven material may include a film layer attached to the surface of the nonwoven material, the opposite surface, on which there are continuous bonded sections located in accordance with a specific pattern, defining many individual non-bonded sections.

Non-woven material may also contain:
a second non-woven canvas having a fibrous structure consisting of individual fibers or filaments, and
the first and second fibrous canvases laid one on top of the other.

 The individual fibers or filaments of the first fibrous web can have one linear density, and the individual fibers or filaments of the second fibrous web can have a second linear density different from the first linear density, wherein the first fibrous web has one surface density and the second fibrous web has a second a surface density different from the first surface density.

The invention also relates to a mechanical fastening system comprising:
component covered
a female component suitable for interfacing with the possibility of disconnection with the male component,
a female component comprising a nonwoven fabric comprising non-bonded portions arranged in accordance with the specific pattern described above.

 The invention also relates to a disposable moisture-absorbing product containing a non-woven material containing non-bonded areas arranged in accordance with the specific pattern described above.

The invention also relates to a disposable moisture-absorbing article comprising:
lining facing the user's body,
outer coating material
an absorbent structure located between the lining and the outer coating material,
a mechanically fastened strap connected to the product, the fastened strap includes a male component,
a female component attached to the outer coating material and suitable for interfacing with the possibility of separation with the male component, and
a female component comprising a nonwoven fabric comprising non-bonded portions arranged in accordance with the specific pattern described above.

In addition, the invention relates to a method for forming a non-woven material containing non-bonded areas located in accordance with a specific pattern, comprising the following steps:
the formation of the first fibrous canvas having a fibrous structure consisting of individual fibers or filaments,
the filing of the fibrous canvas in the sting formed by the opposing first and second shafts, and the first shaft contains a patterned outer surface, and the second shaft has a smooth outer surface,
rotation of the first and second shafts in opposite directions,
the bonding of the fibrous canvas by applying heat and pressure to form a pattern of continuous bonded sections on the surface of the canvas, defining many individual non-bonded sections,
while the bonded area of the fibrous canvas is about 25-50%,
at least a portion of individual fibers or filaments in separate non-bonded sections protrudes into / and is fixed in continuous bonded sections.

The method may also include the following steps:
the filing of the fibrous canvas in the sting between the first and second shafts, and the first and second shafts have a patterned outer surface, and
bonding a fibrous web by applying heat and pressure to form at least two surfaces of the web of a pattern of continuous bonded portions defining a plurality of individual non bonded portions.

In addition, the method may also include the following steps:
the formation of a second fibrous canvas having a fibrous structure of individual fibers or filaments,
supply of the first and second fibrous canvases to the shaft tip,
bonding the first and second fibrous webs together to form a non-woven laminated material containing non-bonded sections arranged in accordance with a specific pattern.

Further, the method may also include the following steps:
the formation of the first fibrous canvas, consisting of fibers or filaments of the first size and having a first surface density, and
the formation of a second fibrous canvas, consisting of fibers or filaments of a second size, different from the first size of fibers or filaments and having a second surface density different from the first surface density.

The method may also include the step of pre-bonding the first fibrous canvas, and
also comprise the step of pre-bonding at least one of the first or second fibrous webs.

 The method may further comprise a step of forming a non-woven layer containing filaments formed from a polymer melt, and a step of forming a non-woven layer containing multicomponent filaments formed from a polymer melt, as well as a step of forming a non-woven layer containing multicomponent crimped filaments, molten polymers.

 Thus, the present invention is directed to the creation of a non-woven material containing continuous bonded sections defining a plurality of individual non-bonded sections, suitable for use as an improved loop material for fastening hook-and-loop fastener systems. Fibers or filaments in individual non-bonded portions made in accordance with the present invention are dimensionally stabilized by continuous bonded portions that surround or encompass each non-bonded portion so that no supporting or backing layer, or film, or adhesive is needed material. Non-bonded portions are specially designed to form a space between fibers or filaments within non-bonded portions that remain substantially disconnected or large to receive and grasp the hook elements of the mating hook material. The hook material may be one of a wide variety of commercially available hook components, which, as is known in the art, comprises a base material from which a plurality of hook elements protrude.

 A nonwoven fabric or a fibrous web with non-bonded portions arranged in accordance with a specific pattern may be, for example, a spunbond fibrous web formed from single-component or multicomponent filaments obtained from melt-forming polymers. At least one surface of the nonwoven material comprises a plurality of discrete non-bonded portions surrounded or covered by continuous bonded portions. Continuous bonded sections stabilize the size of the fibers or filaments forming the fibrous web by bonding or melting and gluing together parts of the fibers or filaments that extend beyond the non-bonded sections and are located in the bonded sections, while leaving the fibers or filaments in non-bonded areas are relatively free from bonding or melting. It is desirable that the degree of bonding or melting in the bonded areas is significant in order to turn the fibrous web into a non-fibrous structure in the bonded areas, leaving it possible for the fibers or filaments in non-bonded areas to act as “loops” for receiving and gripping hook elements protruding from the hook material. Since each individual non-bonded portion is completely surrounded by the bonded portion, the fibers or filaments in the non-bonded portions typically have at least one portion thereof, and preferably a plurality of portions thereof, protruding into the bonded portion region. As a result, it is unlikely that loose fibers or filaments in each loose section, acting as “loops”, will be separated from / or pulled out of the structure of the fibrous web when the hook elements of the hook material are removed or removed during normal use of the hook-and-loop fastened system " Thus, a non-woven material with non-bonded areas arranged in accordance with a certain pattern, made in accordance with the present invention, when used as a loop material, reduces fiber pulling due to a decrease in the number of loose, loose and non-glued fibers or filaments in the loop material. Looped non-woven material with non-bonded areas arranged in accordance with a specific pattern has improved surface bonding and strength and is devoid of any other properties that adversely affect functioning as a loop material from the point of view of tearing and shearing forces.

 Alternative embodiments of the above nonwoven fabric or fibrous web with non-bonded portions arranged in accordance with a specific pattern include laminates of two or more fibrous webs or layers, laminates of two or more fibrous webs or layers having different surface densities, or in which various types of fibers and / or fibers with different sizes to form the respective fibrous webs or layers, and laminates of two or more fibrous canvas and film layer.

 A suitable method of forming a non-woven material with non-bonded sections arranged in accordance with a specific pattern made in accordance with the present invention comprises the following steps: manufacturing a non-woven material or fibrous web, introducing opposed first and second calendars and setting wiring between them, wherein at least one of the shafts is heated and contains on the outer surface a bonding pattern, which is a continuous pattern of the supporting sections in, determining the location of the plurality of individual holes, and the transmission of non-woven material or fibrous canvas through the sting of said shafts. Each hole in said shaft or shafts bounded by continuous supporting portions forms a separate non-bonded portion on at least one surface of a nonwoven fabric or fibrous web in which the fibers or filaments of the web are substantially or completely not bonded. In an alternative formulation, the continuous pattern of the support portions in this shaft or shafts forms a continuous pattern of bonded portions that define a plurality of individual non-bonded portions on at least one surface of said non-woven material or fibrous web. Alternative embodiments of the aforementioned method include: pre-bonding the non-woven fabric or fibrous web before passing the material or fibrous web through a stitch formed by calender rolls, or introducing a plurality of non-woven webs to form a laminate with non-bonded portions in accordance with a specific pattern.

 When used as a hinge component of a hook-and-loop fastening system in personal care products for short-term use, a non-woven non-woven fabric with non-bonded areas arranged in accordance with a specific pattern, made in accordance with the present invention, can be glued or attached to the outer layer or lining the product as a separate lining of the loop material. In an alternative embodiment, a looped non-woven material with non-bonded areas arranged in accordance with a specific pattern may form the entire outer coating or lining of such a disposable moisture-absorbing personal care product.

Brief Description of the Drawings
Figure 1 shows a plan on an enlarged scale non-woven material with non-bonded areas located in accordance with a certain pattern, made in accordance with the present invention.

 In FIG. 2 shows a cross-section of a non-woven material with non-bonded sections arranged in accordance with a specific pattern shown in FIG.

 Figure 3 shows schematically, a side view, an exemplary embodiment of the method and device for the manufacture of non-woven fibrous canvas "spunbond" from bicomponent filaments.

 Figure 4 shows schematically, a side view, the execution of the method and device for the manufacture of non-woven material with non-bonded areas located in accordance with a specific pattern in accordance with the present invention.

 In FIG. 5 shows a partial perspective view of a patterned shaft that can be used in accordance with the method and apparatus of FIG. 4.

 Figure 6 shows a perspective view of a disposable diaper (diaper), in which non-woven material with non-bonded sections arranged in accordance with a specific pattern is used as looped overlays.

DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a non-woven fabric or fibrous canvas containing continuous bonded sections defining a plurality of individual non-bonded sections, which is suitable for use as an improved loop fastener material for a mechanical hook-and-loop fastening system. For clarity, the present invention will be described as loop material for fasteners, both separately and in combination with its use in disposable moisture-absorbing personal care products, including diapers, sweatpants, clothing for persons with incontinence, sanitary napkins, bandages, etc. The present invention should not be limited to this list of special-purpose products, since it can be used in all applications in which such non-woven materials and fibrous canvases containing non-bonded areas arranged in accordance with a specific pattern can be successfully used.

 For example, a non-woven material or fibrous canvas containing unshaped areas arranged in accordance with a specific pattern can be used as filter materials, as well as materials for directing or distributing liquids in disposable moisture-absorbing personal care products, such as a body contact pad consumer, or surgical materials used in disposable diapers, etc. Continuous bonded sections of a fibrous web containing non-bonded portions arranged in accordance with a specific pattern are substantially watertight, while individual non-bonded portions of the canvas remain moisture permeable. Thus, a canvas containing unfastened areas located in accordance with a specific pattern includes separate, or isolated unfastened areas that function as specific points or channels for the flow of fluid. The combination of continuous bonded sections and individual non-bonded sections in a canvas containing unbonded sections located in accordance with a specific pattern can be used to direct and drain the fluid flow. Moreover, the pattern of continuous bonded sections and individual non-bonded sections can be modified to provide a wide range of desired locations of points or flow channels for fluid filtration, control, or distribution by modifying the structure containing non-bonded fibrous sections arranged in accordance with a specific pattern, as described in detail here. Moreover, three-dimensional topography of the surface of a material containing non-bonded areas arranged in accordance with a specific pattern made in accordance with the present invention may have an aesthetic appearance that is pleasing to the consumer.

When used as a covering or loop component of a hook-and-loop fastener system, the loop material made in accordance with the present invention is intended to be used with a wide range of hook materials. For example, hook materials suitable for use with a loop material made in accordance with the present invention may be supplied by Velcro Group Company (Manchester, New Hampshire) under the trade designation CFM-22-1097; CFM-22-1121; CFM-22-1162; CFM-25-1003; CFM-29-1003; CFM-29-1005; or by "Minnesota Mining and Manyufekchuring Co." (Sanya Paulo, Minn.) under the designation CS 200. Suitable hook materials generally comprise about 16- 620 hooks / cm ^2, or about 124-388 hooks / cm ^2, or about 155-310 hooks / cm ² . The hooks preferably have a height of about 0.0254-1.9 mm or 0.381-0.762 mm.

 As is known in the art, hook materials typically comprise a backing with a plurality of one-sided or double-sided hooking elements extending generally perpendicular to the backing. Here, the term "double-sided" means hook material having separate adjacent hook elements oriented in opposite directions in the longitudinal direction of the hook material. The term "one-sided", on the other hand, means a hook material having separate adjacent hook elements oriented in the same direction in the longitudinal direction of the hook material.

To illustrate a non-woven loop material containing non-bonded portions arranged in accordance with a specific pattern made in accordance with the present invention, the following are test data using one type of hook material. The hook material comprises hook elements having an average total height measured from the upper surface of the base material to the highest point of the hook elements. The average height of the hook elements used in conjunction with the material of the present invention was about 0.5 mm. This hook material has a hook density of about 265 1 / cm ² . The thickness of the substrate was 0.09 mm. This hook material can be supplied by Velcro USA under the designation CFM-29-1003. Other parameters and properties of the hook material are given in the following description of examples.

 Although the term “hook material” is used here to refer to a part of a mechanical fastening system having gripping (hook) elements, it is not intended to limit the shape of the gripping elements to a concept including “hooks”, but it should include any form of gripping elements, both one-sided and double-sided. that are known in the art that should be created or adapted to grip mating loop fastener material, such as a non-woven loop material with non-bonded sections arranged in accordance with a specific pattern, made in accordance with the present invention.

 Figures 1 and 2 show an embodiment of a non-woven loop material 4 with non-fastened portions arranged in accordance with a specific pattern made in accordance with the present invention. For the sake of definiteness, the term “non-woven loop material with non-fastened portions arranged in accordance with a specific pattern”, as used here, means a loop or covering component of a hook-and-loop fastened system in its simplest form, i.e. non-woven material or fibrous canvas containing continuous bonded sections 6, which define many discrete size-stabilized non-bonded sections 8. In continuous bonded sections 6, fibers or filaments of a non-woven fibrous canvas are completely glued or fused together, and preferably have no fibrous structure while in non-bonded sections 8, the fibers or filaments of a nonwoven material or fibrous canvas are substantially or completely free They are not bonded or fused and retain their fibrous structure. It is not intended by this term to limit the loop material made in accordance with the present invention to only non-woven material; rather, the loop material made in accordance with the present invention can be successfully used in alternative embodiments, in which, for example, a non-woven material or a fibrous canvas with non-bonded areas arranged in accordance with a specific pattern can be attached or bonded to a film layer material. There is no intention with the term "loop" to limit the loop material made in accordance with the present invention, only to materials in which discrete, individually formed material loops are used to receive and capture the hook elements of the mating hook material; rather, the loop material made in accordance with the present invention contains fibrous nonwoven materials or fibrous webs in which individual fibers or filaments act as elements capturing hook elements without converting such fibers or filaments into discrete loops.

 The terms "layer" or "canvas" when used in this description in the singular can have a double meaning and mean one element or many elements. The term "laminate" here means a composite material containing a material made of two or more layers or canvases of material that have been attached or bonded to each other.

 Non-woven loop material 4 (see FIGS. 1 and 2) with non-bonded portions arranged in accordance with a specific pattern can be generally described as any non-woven fabric or canvas that, when formed in accordance with the present invention, is suitable for receiving and grabbing hooks of conjugated hook material. The terms "non-woven material" or "fibrous canvas" here refers to canvases having a structure consisting of individual fibers or filaments that are superimposed on each other, but not in a specific shape, as in a knitted fabric. It should be noted, however, that although the present invention will be described in the context of nonwovens and canvases, fabrics and / or knitted materials formed from appropriate materials such that a pattern of continuous bonded sections defining a plurality of individual non-bonded sections is formed, at least on the one hand, it can be stabilized in size using the method and equipment described here.

 Commercially available thermoplastic polymeric materials can be successfully used for the manufacture of fibers and filaments, from which a non-woven material 4 is formed, containing non-bonded sections arranged in accordance with a specific pattern. The term “polymer” will include, but not limited to, homopolymers, copolymers such as, for example, block polymers, grafted copolymers, random copolymers and alternative copolymers, ternary copolymers, etc., and mixtures and modifications thereof. Moreover, unless otherwise specifically limited in any other way, the term "polymer" will include all possible geometric configurations of materials, including, without limitation, isotactic, syndiotactic and chaotic symmetries. The terms "thermoplastic polymers" or "thermoplastic polymeric material" mean polymers with long molecular chains that soften when heated and return to their original state when cooled to ambient temperature. For example, a thermoplastic material includes, without limitation, poly (vinyl chloride) s, polyesters, polyamides, polyfluorocarbons, polyolefins, polyurethanes, polysirens, polyvinyl alcohols, caprolactams, and copolymers of these polymers. The fibers or filaments used in the manufacture of non-woven material 4, containing non-bonded areas located in accordance with a specific pattern, can have any suitable morphology and can include hollow or solid, un twisted and corrugated, one-component, bicomponent or multicomponent, of two or many components fibers and filaments and mixtures of such fibers and / or filaments, as is well known, in this industry.

 Fibrous webs that can be used as non-woven materials containing non-bonded areas arranged in accordance with a specific pattern, made in accordance with the present invention, can be formed by many different known methods of formation, including the method of spun bonding, aerodynamic method or method of bonding canvas with a carding machine. All such fibrous webs can be pre-bonded using known methods of bonding fibrous webs and then bonded using a bonding method in which areas located in accordance with a specific pattern and devices made in accordance with the present invention, or in the alternative, are left unfastened. variant, such fibrous canvases can only be bonded using the bonding method, in which leave areas not located in accordance with a specific pattern, and devices made in accordance with the present invention.

 Spunbond fiber canvases are made from filaments obtained from polymer melt. The term "filament from a polymer melt" refers to fibers or filaments of small diameter, which are formed by extruding a melt of a thermoplastic substance in the form of filaments through many thin, usually round capillary channels in the die, while the diameter of the filaments decreases rapidly, for example, when using ejectorless or ejector methods of drawing in a liquid state, well known in the field of production using the technology of "spunbond". The production of spunbond fiber webs is described in US Patents: N 4,340,563, issued to Appell et al., N 3692618, issued to Dorchschner et al., N 3802817, issued to Matsuki et al., N 3338992 and N 3341394, issued in the name of Kinney, N 3502763, issued in the name of Hartman, N 3276944, issued in the name of Levy, N 3502538, issued in the name of Peterson, and N 3542615, issued in the name of Dubo and others, which are incorporated herein by reference. The filaments obtained from the polymer melt by the method of "spanbond" are usually continuous and have diameters of more than 7 microns, and more specifically, of the order of 10-30 microns. Another frequently used expression for the diameter of fibers or filaments is denier, which determines the weight in grams of 9,000 m of fibers or filaments. Spunbond filaments are usually laid on a moving breathable conveyor or formation surface on which they form a fibrous web. Spunbond filaments generally do not have the ability to adhere when they are laid on the surface of the formation.

 Spunbond materials are usually stabilized or consolidated (pre-bonded) in any way directly in the process of their formation in order to give the canvas sufficient cohesion to provide resistance to fairly severe conditions of the subsequent processing to the finished product. This type of stabilization (pre-bonding) can be performed by using an adhesive applied to the filaments in the form of a liquid or powder, which can be thermofixed, or more often with the help of sealing shafts. The term “sealing shafts” here means a series of shafts located above and below the fibrous web used to densify the fibrous web as a way of treating a newly formed fibrous web of filament from a polymer melt, more specifically, a spunbond fibrous web to give the fibrous canvas sufficient cohesion for subsequent processing, not to bring to a relatively strong bonding, achieved with final bonding, in such ways as continuous bonding onizyvayuschimi air jets, thermal bonding, ultrasonic bonding, etc. The sealing shafts slightly compress the fibrous web in order to increase its self-adhesion and thus increase its bonding.

In an alternative embodiment of the pre-bonding step, a “hot air knife” tool is used, as described in detail in Assigned General Patent Application No. 362328, registered December 22, 1994, which is incorporated herein by reference. In short, the term “hot air knife” means a method for pre-bonding a newly formed fiber web of filaments from a polymer melt, more specifically, a spunbond fiber web in order to impart sufficient bonding to the fibrous web, i.e. to increase the strength of the fibrous canvas for its subsequent processing, but not to bring to a relatively strong bonding achieved during final bonding, as noted above. A "hot air knife" is a device that focuses a stream of hot air moving at a very high speed, usually in the range of about 300-3000 m / min or, more specifically, about 900-1500 rpm, and directed directly onto the fibrous web after its formation. The air temperature is usually within the melting point of at least one of the polymers used in the fibrous canvas, and is usually about 90-290 ^o C for thermoplastic polymers commonly used in the process of spun bonding. Monitoring temperature, speed, pressure, flow rate and other parameters eliminates damage to the fibrous canvas, at the same time, increasing its cohesion. A focused hot air knife air stream is created and guided by at least one slotted nozzle with a width of about 3-25 mm, more particularly about 9.4 mm, serving as an outlet for heated air in the direction of the fibrous web, the nozzle being moved mainly in the transverse direction mainly across the entire width of the fibrous canvas. In other embodiments, a plurality of nozzles arranged one after the other can be used, or they can be separated by small gaps. At least one nozzle is usually, but not necessarily, continuous and may contain, for example, closely spaced openings. The “hot air knife” has a collector for distributing and containing heated air until it exits the nozzle. The pressure in the collector of the "hot air knife" is usually about 2-22 mmHg, and the "hot air knife" is located at a distance of about 6.35-254 mm, and more particularly about 19.05-76.20 mm, above the surface formation. In a particular embodiment, the cross-sectional area of the “hot air knife” collector for the passage of air flow in the transverse direction (i.e., the cross-sectional area of the collector in the longitudinal direction of the machine) is at least two times the total living area of the nozzle. Since the breathable mesh conveyor on which the spunbond fiber web is formed is typically moved at high speed, the exposure time for each specific part of the fibrous web of air flowing from the “hot air knife” is usually less than a tenth of a second and usually takes one hundredth of a second, as opposed to the method of fastening with piercing jets of air, in which the duration of exposure to hot air is many times longer. The method using the "hot air knife" includes a wide range of regulation and control over many parameters, including air temperature, speed, pressure and flow, the location of the slit or holes, their density and dimensions, the gap between the collector of the "hot air knife" and a fibrous canvas .

The spunbond method can also be used to form fibrous canvases from bicomponent spunbond filaments with a side-by-side structure (or “core-shirt”) of low density polyethylene / polypropylene. A suitable method for forming such spunbond fibrous webs from bicomponent filaments is described in US Pat. No. 5,418,045 to Pike et al., Which is incorporated herein by reference in its entirety. Production line 10 (see FIG. 3) for forming such bicomponent filaments and forming the resulting fibrous webs comprises two extruders 12a and 12b for separately supplying polyethylene and polypropylene from feeders 14a and 14b, respectively, to the bicomponent die 18. Filters for forming bicomponent filaments are well known in the art and therefore are not described in detail here. Typically, the die 18 includes a housing comprising a spinning block, which includes a plurality of vertically stacked plates with holes arranged in accordance with a specific pattern, arranged to create overpasses for flows for directing polymers with a high melting point and low melting point separately to the fiber-forming holes in the die. The die 18 comprises openings arranged in one or more rows that form a downward curtain of filaments when the polymers are extruded through the die. As soon as the curtain of filaments leaves the die 18, the filaments begin to come into contact with sharply cooling gas flows directed from one or both sides (not shown) of the curtain of filaments, which at least partially stretch the filaments and create hidden spiral crimping, starting from the die 18. Typically, cooling air flows direct perpendicular to the length of the filaments at a speed of about 30-120 m / min at a temperature of about 7-32 ^o C.

The chamber for extracting filaments, or an aspirator 22, is located under the die 18 and is designed to receive chilled filaments. Chambers for drawing filaments, or aspirators, designed for drawing molded from a polymer of melt polymers of filaments, are well known in this industry, as mentioned above. For example, filament extraction chambers suitable for use in this process include a linear filament aspirator of the type described in US Pat. No. 3,802,817 to Matsuki et al. And ejectors of the type shown in US Pat. No. 3,692,618 to Dorschner et al. And N 3423266,
issued in the name of Davis and others, the description of which is incorporated herein by reference in its entirety. The chamber for drawing filaments 22 generally comprises an elongated passage through which the filaments are pulled by exhaust gas flows passing through this passage. An exhaust gas can be any gas, such as air, that does not adversely affect filament polymers. Heated exhaust gas is supplied from the heater 24 to the exhaust chamber. Since the exhaust gas draws the cooled filaments and entrains the surrounding air from the exhaust chamber 22, the filaments are heated to the temperature required for the manifestation of latent tortuosity in them. The temperature required for the manifestation of latency in the filaments is about 43 ^° C to a maximum value that is less than the melting point of the polymer component with a low melting point, which, in this case, is polypropylene. Usually, at a higher temperature, a greater number of corrugations are formed per unit length of the filament. Alternatively, the curtain of the filaments emerging from the die 18 may be drawn at ambient temperature, followed by the formation of a fibrous web of substantially straightened or unrolled spunbond filaments.

 Elongated and crimped filaments exit the chamber for drawing filaments 22 and lay them on an infinite surface of the formation 26 randomly, usually using a vacuum device 30 located below the surface of the formation. A vacuum is created to eliminate unwanted dispersion of the filaments and to direct the filaments to the surface of the formation 26 to form a uniform loose fiber canvas from bicomponent filaments. If desired, the resulting fibrous web can be lightly compressed using a sealing shaft 32 or a “hot air knife” (not shown) before the fibrous web is subjected to processing on an aggregate 34 creating non-bonded portions arranged in accordance with a specific pattern in in accordance with the present invention, as will be described below.

 Fibrous webs suitable for use in the practice of the present invention can also be made from bonded fibrous webs formed by carding machines, as well as aerodynamically formed fibrous webs that are formed from staple fibers having a finite length. Particular attention is required when using such fibrous webs for the manufacture of non-woven looped materials with non-bonded sections arranged in accordance with a specific pattern made in accordance with the present invention, in order to adapt the size and density of individual non-bonded sections to maximize the number of individual fibers in the non-bonded sections, containing at least one part of the fiber, and preferably a plurality of parts of the fibers directed into bonded e plots.

 Bonded fibrous webs formed using carding machines are made from staple fibers, which are usually supplied in the form of bales. Bales are installed in a bale feeder that separates the fibers. Then the fiber is directed through ripping and combing devices, on which further loosening, separation and parallelization of the staple fiber in the longitudinal direction of the machine is carried out to form a generally fibrous web with predominantly oriented fibers in its longitudinal direction. Once the fibrous web is formed, it can be pre-bonded as described above.

 Aerodynamic formation is another well-known method by which a fibrous web can be formed. During aerodynamic formation, complexes of short fibers having a typical length of the order of 6-19 mm are disconnected and introduced into the air stream, and then deposited on the formation surface, usually by vacuum suction. The randomly laid fibers can then be pre-bonded to each other using known bonding methods.

 After the fibrous web is formed, the pre-bonded or non-bonded fibrous web is conducted through an appropriate process and apparatus for forming a non-woven loop material with non-bonded portions arranged in accordance with a specific pattern in accordance with the present invention.

 A method and apparatus for forming a non-woven loop material with non-bonded portions arranged in accordance with a specific pattern in accordance with the present invention will now be described.

 A device for forming a non-woven loop material with non-bonded portions arranged in accordance with a specific pattern in accordance with the present invention is indicated generally in 34 (see FIG. 4). The device comprises a first rolling device 36 for the first fiber canvas 38. Optionally, one or more additional rolling devices 37 for the canvas (dotted) can be used for additional fiber canvas or layers 39, for the formation of multilayer laminates with non-bonded areas located in accordance with a certain patterned. It should be noted that, although in the device shown in FIG. 4, a rolling device 36 for feeding fibrous web is shown, an aggregate 40 for creating a non-woven fabric containing non-bonded areas arranged in accordance with a specific pattern can be placed in a continuous process (production line) with the non-woven fabric forming equipment described herein as the one shown in FIG. 3. The term "unit for creating a non-woven material containing non-bonded areas arranged in accordance with a certain pattern" should not be taken as an aggregate for disconnecting, breaking or removing an existing bond, if any, in fibrous canvas 38; rather, the term "unit for creating a nonwoven material containing non-bonded areas arranged in accordance with a specific pattern" refers to a device that continuously fastens or straightens the fibers or filaments of which the fibrous web 38 is formed in certain portions of the fibrous web and prevents bonding or the melting of the fibers or filaments from which the fibrous web 38 is formed in other defined portions of the fibrous web, e plots are referred to herein as “bonded parcels” and “non-bonded parcels,” respectively.

 The first fibrous canvas 38 (or simply fibrous canvas, if only one rolling unit is used) is rolled by the rolling unit 36 and introduced into the unit 40 to create a non-woven material containing non-bonded sections arranged in accordance with a specific pattern that contains the first, or patterned, shaft 42 and a second, or support, shaft 44, both shafts being driven by conventional drive means, such as, for example, electric motors (not shown). The patterned shaft 42 is a regular round cylinder that can be made of any suitable, durable material, such as steel, for example, to reduce wear between the shafts during operation. On the surface of the patterned shaft 42, the support sections 46 are arranged in accordance with a specific pattern and many individual holes 48 are defined. The support sections 46 are arranged so as to form a sting together with the smooth or even outer surface of the opposing support shaft 44, which is also a round cylinder, which can be made of any suitable durable material.

 The size, shape, number and location of the holes 48 in the patterned shaft 42 can be changed to meet the specific requirements of the finished non-woven loop material containing unfastened sections located in accordance with the specific pattern produced by this shaft. In order to reduce the incidence of pulling the fibers from the finished loop material, the size of the holes 48 in the patterned shaft 42 should be chosen so as to reduce the likelihood that the entire length of the filaments or fibers from which the non-bonded section is formed is in one non-bonded section. If the problem is formulated differently, the length of the fiber should be chosen so as to reduce the likelihood that the entire length of a given filament or a given fiber is in one unfastened section. On the other hand, the desirability of limiting the size of the holes 48 in the patterned shaft 42 and the non-bonded portions 8 formed by this device in a non-woven loop material 4 containing non-bonded portions arranged in accordance with a specific pattern is balanced by the need for the non-bonded portions 8 to be of sufficient size, to provide the required area of the mating sections to capture the hook elements of the mating hook material. The round holes 48 shown in FIG. 5 have an average diameter in the range of about 1.27-6.35 mm, and more preferably 3.30-4.06 mm, and a depth measured from the outer surface of the patterned shaft 42 of at least about 0.51 mm or more , more specifically at least about 1.52 mm, are considered suitable for forming a non-woven material containing non-bonded areas arranged in accordance with a specific pattern made in accordance with the present invention. Although the holes 48 in the patterned shaft 42, as shown in FIG. 5, round, other shapes, such as oval, square, rhombus, etc., can be successfully used.

The number or density of holes 48 in the patterned shaft 42 can also be selected so as to create the desired size of the area of coupling with the hook elements, without unduly limiting the size of the continuous bonded sections and allowing growth to increase the likelihood of pulling out the fibers. Patterned shafts, with a hole density in the range of about 1.0-25.0 1 / cm ² , and more particularly about 5.0-7.0 1 / cm ² , can be used to successfully form material containing unfastened sections, located in accordance with a specific pattern developed in accordance with the present invention.

 In addition, the distance between the individual holes 48 can be selected in order to increase the coupling with the hook material of the finished loop material containing unfastened sections located in accordance with a specific pattern, without unduly reducing the part of the material containing unfastened sections located in accordance with a specific pattern occupied by continuous bonded sections, which serve to reduce the likelihood of pulling fibers. Suitable sizes of the sections between the holes in the shown embodiment may be about 3.30-5.59 mm along the axes of the holes in the longitudinal and transverse directions. The term "longitudinal direction" means here in the direction of the length of the material, that is, in the direction in which it is produced (from left to right, in Fig. 3). The term "transverse direction" here means the width of the material, i.e. direction predominantly perpendicular to the longitudinal direction.

 The specific location or configuration of the holes 48 in the patterned shaft 42 is not considered critical, because in combination with the size of the holes, the shape and density of their location, the desired levels of surface integrity and durability and mating with the hook element are achieved. For example, as shown in FIG. 5, the individual holes 48 are staggered in rows (see also FIG. 1). Other excellent configurations are contemplated within the scope of the present invention.

 The portion of the outer surface of the patterned shaft 42 occupied by the continuous support portions 46 can also be modified to meet the expected requirements for a finished material containing non-bonded portions arranged in accordance with a specific pattern, depending on its purpose. The degree of bonding communicated to the non-woven loop material containing non-bonded portions arranged in accordance with a specific pattern by the continuous support portions 46 can be expressed as a percentage of the bonded area in percent, which means part of the total surface area of at least one side of the non-woven material 4, containing non-bonded sections arranged in accordance with a specific pattern (see FIG. 1), which is occupied by bonded sections 6. In general, the lower limit of the proportion of bonded area and (in percent) suitable for forming material 4 containing non-bonded sections arranged in accordance with a specific pattern made in accordance with the present invention, is determined by the point at which pulling the fibers too much reduces the surface bond and durability of the material containing non-bonded sections, located in accordance with a specific pattern. The required proportion of bonded area (in percent) depends on a number of factors, including the type (s) of polymeric materials used to form the fibers or filaments constituting the fibrous web, whether the fibrous layer is a single or multilayer fibrous structure, the fibrous web is not bonded or previously bonded before feeding it into the unit to create a non-woven material containing non-bonded areas located in accordance with a specific pattern, etc. It has been found that a nonwoven loop material containing non-bonded portions arranged in accordance with a specific pattern, the bonded portion of which is about 25-50% or more, especially about 36-50%, is suitable.

 The temperature of the outer surface of the patterned shaft 42 can be controlled by heating or cooling relative to the support shaft 44. Heating and / or cooling can affect the properties of the processed fibrous web (s) and the degree of bonding of a single web or multiple fibrous webs passed through a sting formed between the interacting patterned shaft 42 and the support shaft 44. In the embodiment shown in FIG. 4, for example, both shafts: the patterned shaft 42 and the support shaft 44 are heated, preferably to the same bonding temperature. The specific temperature limits that are used when forming a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern depend on a number of factors, including the types of polymeric materials used to form a material containing non-bonded sections arranged in accordance with a particular pattern, the values input or linear velocity (s) of the fibrous web (s) passing through the sting formed between the interacting patterned shaft 42 and the support shaft 44, and by the pressure in the tip between the shaft 42 and the patterned anvil roll 44.

 The support shaft 44 shown in FIG. 4 has an outer surface that is significantly smoother than the surface of the patterned shaft 42, and is preferably smooth or even. You can, however, on the outer surface of the support shaft 44 to make a light pattern and consider it still smooth or even from the perspective of the present invention. For example, if the support shaft 44 is made of / or has a softer surface, such as rubber-soaked cotton or rubber, it will create unevenness on the surface, although it will still be considered smooth or even in terms of the present invention. Such surfaces in the group are considered here as “flat”. The support shaft 44 provides a base for the patterned shaft 42 and the fibrous web or canvases that come into contact with it. Typically, the support shaft 44 is made of steel or from materials such as hard rubber, rubber-treated cotton or polyurethane.

 Alternatively, the support shaft 44 may be replaced by a patterned shaft (not shown) having a pattern of continuous bearing sections defining a plurality of individual holes therein, as in the patterned shaft 42 described above. In this case, an assembly for manufacturing material containing non-bonded sections, arranged in accordance with a specific pattern, would include a pair of patterned shafts rotated in opposite directions, which would create a pattern of continuous fastened sections defining a plurality of non-bonded sections located on both: the upper and lower surfaces of the non-woven loop material containing non-bonded sections located in accordance with a specific pattern. The rotation of the patterned shafts located one against the other can be synchronized so that the resulting non-bonded sections on the surfaces of the material containing the non-bonded sections located in accordance with a specific pattern are aligned vertically or come together.

 The patterned shaft 42 (see FIG. 4) and the support shaft 44 rotate in opposite directions from one another so as to stretch the fibrous canvas (or canvases) through the sting defined by them. The patterned shaft 42 has a first rotation speed measured on its outer surface, and the support shaft 44 has a second rotation speed measured on its outer surface. In the presented embodiment, the first and second rotational speeds are substantially the same. However, the rotation speeds of the patterned and support shafts can be modified to create a difference in speeds between the shafts rotating in opposite directions.

 The locations of the oppositely mounted patterned shaft 42 and the support shaft 44 can be varied to create a tip area 50 between the shafts. The pressure in the tip within the area of the tip 50 can be changed depending on the properties of the fibrous canvas itself or the canvases themselves and on the desired degree of bonding. Other factors that may allow variation in sting pressure include the temperatures of the patterned shaft 42 and the support shaft 44, the size and spacing of the holes 48 on the patterned shaft 42, as well as the types of polymeric materials used to form the non-woven fabric containing non-bonded sections arranged in accordance with a specific pattern. From the point of view of the degree of bonding communicated to the non-woven loop material containing non-bonded portions arranged in accordance with a particular pattern through continuous bonded portions, it is desirable that the material containing the non-bonded portions arranged in accordance with a specific pattern be completely bonded or expanded onto bonding areas so that the polymeric material does not remain in the form of fiber. This high degree of bonding is important for stabilizing a portion of the fibers or filaments in the non-bonded sections, protruding into the continuous bonded sections and reducing the likelihood of the fibers being pulled when the hook elements are disconnected from the individual non-bonded sections.

 Once a non-woven loop material containing non-bonded portions arranged in accordance with a specific pattern made in accordance with the present invention is formed, it can be attached to a coating material or to a lining of a moisture-absorbing personal care product, such as a disposable diaper 60 shown in FIG. .6. More specifically, a non-woven loop material containing non-bonded portions arranged in accordance with a specific pattern is attached to the outer surface such that at least one surface of a non-woven loop material containing non-bonded portions located in accordance with a specific pattern having a pattern of continuous bonded portions , defining many separate loose areas, is open. A non-woven loop material containing non-bonded portions arranged in accordance with a specific pattern can be attached to the outer shell 62 of the diaper 60 using known fastening means, including gluing, thermal bonding, ultrasonic fastening, or combinations thereof. A wide range of adhesives can be used, including, without limitation, adhesives based on solvents, water, melting and pressing sensitive adhesives. Powder adhesives can be applied to a non-woven loop material containing non-bonded areas arranged in accordance with a specific pattern, and then heated to transfer the powder adhesive to an active state and secure bonding.

 The diaper 60, which is typical for most moisture-absorbing personal care products, contains a moisture-permeable lining 64 facing the user's body and a moisture-proof outer cover 62. Various woven or non-woven materials can be used to make the lining 64 facing the user's body. For example, a lining facing the user's body may consist of a meltblown or spunbond nonwoven fibrous web of polyolefin fibers, or a bonded canvas from a carding machine made from natural and / or synthetic fibers. Tire 62 is typically made of a thin thermoplastic film, such as a plastic film. The outer coating of the polymer film can be embossed and / or with a matte finish to give greater aesthetic appeal. Other alternative designs for outer coating 62 can be used, including woven and non-woven fibrous webs that have been designed or processed to provide the desired level of moisture impermeability, or laminates formed from fabrics or non-woven materials and a thermoplastic film. Coating 62 may optionally consist of a vapor- or gas-permeable “breathable” material that is permeable to vapor or gas and, at the same time, substantially impervious to liquid. Breathing properties can be imparted to polymer films by, for example, using fillers in the composition of the polymer film, and when the filler-polymer composition is extruded in the form of a film and the film is then drawn sufficiently to create cavities around the filler particles, a “breathable” "film ability. In general, the more filler is used and the greater the degree of drawing, the greater is the "breathable" ability of the film.

 Between the liner 64 and the outer cover 62 is an absorbent pad 66, formed, for example, from a mixture of hydrophilic cellulosic wood pulp from fluffy fibers and having a high absorption capacity of gel particles (for example, superabsorbent). The absorbent pad 66 is typically compressible, comfortable, does not bother the wearer's skin and is capable of absorbing and retaining body fluid. In the present invention, the absorbent pad 66 may consist of a single composite length of material or of multiple separate lengths of material. The dimensions and absorbency of the absorbent pad 66 must be comparable with the size of the intended user and the amount of fluid that the intended user of the diaper 60 can release.

 The elastic elements may be selectively located near each longitudinal edge 68 of the diaper 60. Each elastic element is positioned to stretch and hold the lateral edge 68 of the diaper 60 on the user's leg. In addition, elastic elements can also be located near one or both waist edges 70 in order to form an elastic belt.

 The diaper 60 may also include randomly accumulating wings 72 made of / or attached to the lining 64 facing the user's body. Suitable designs and devices for such a wing are described, for example, in US Pat. No. 4,704,116, issued to Enloy, the description of which is incorporated by reference in its entirety.

 To fix the diaper 60 on the body of the user, the diaper must have fastened means of some type fixed on it. As shown in FIG. 6, the fastening means are made in the form of a hook-and-loop fastening system including hook elements 74 attached to the inner and / or outer surface of the outer cover 62 on the back waist portion of the diaper 60, and one or more loop elements or strips 76 made from a nonwoven loop material containing non-bonded portions arranged in accordance with a certain pattern made in accordance with the present invention, attached to the outer surface of the outer coating 62 on the front th waist part of the diaper 60.

 To implement the aforementioned embodiments of the present invention, a series of non-woven loop materials containing non-bonded sections arranged in accordance with a specific pattern, along with comparable previously known non-woven materials, has been prepared to further illustrate the present invention. These samples were tested to determine the tear resistance and shear strength of material samples.

Tear-off resistance is a measure of its functional purpose. More specifically, tear-off resistance is a term used to describe the amount of force required to detach the male and female components of a hook-and-loop fastening system from one another. One the way to measure the separation resistance is to pull one component from another at an angle of 180 ^o .

 Shear strength is another measure of the strength of a hook-and-loop fastening system. Shear strength is measured by mating the male and female components and applying a force in the plane defined by the joint surface to separate these two components.

 Descriptions of the test methods used to evaluate the properties of individual samples of nonwoven loop materials containing non-bonded sections arranged in accordance with a specific pattern made in accordance with the present invention are given below.

Test procedure
Surface density
The surface density of the various materials described herein was determined in accordance with Federal Test Procedure N 191A / 5041. The dimensions of the test material samples were 152.4 x 152.4 mm, three samples of each material were tested, and then the average value was determined. The values shown below are average values.

Bulk
The volume of the test materials, which is expressed in thickness, was measured with a Sterret volumetric tester at a pressure of 35 g / cm ² .

Tear resistance tests at an angle of 180 ^o
The test for resistance to separation at an angle of 180 ^o include joining the hook material to the loop material fastening system "hook-loop" and then peel the hook material from the loop material at an angle of 180 ^o. The maximum load required to separate the materials was recorded in grams.

To perform the tests, we used a tensile testing machine with a constant tensile speed of samples, with a full scale of up to 5000 g, such as Sintech System 2, an integrated measuring system with a computer, supplied by Sintech Inc., which has a representative office in Research Triangular Park, pcs. North Carolina. A sample of loop material with dimensions of 75x102 mm was placed on a flat, sticky abutment surface. A sample of hook material with dimensions 45x12.5 mm, which was glued and ultrasonically bonded to a practically inextensible non-woven material, was laid on top and pressed to the upper surface of the sample loop material. To ensure adequate and uniform adhesion of the hook material to the loop material, a 2.4 kg hand press roller was used, which was rolled through the connected samples of hook and loop materials for one cycle and one cycle was rolled back and forth with the hand roller for alignment. One end of the attached material carrying the loop material was fixed in the upper clamp of the tensile machine, and the end of the loop material directed towards the upper clamp was folded down and fixed in the lower clamp of the tensile machine. The fastening of the corresponding materials in the clamps of the tensile testing machine should be adjusted so that the minimum slack is in the corresponding materials before turning on the tensile testing machine. The hook elements of the hook material are oriented in a direction predominantly perpendicular to the intended directions of movement of the clamps of the tensile testing machine. The tensile testing machine operated at a moving clamp speed of 500 mm / min, and the maximum load in grams required to disconnect the hook material from the loop material at a separation angle of 180 ^° was recorded.

Dynamic shear strength tests
Dynamic shear strength tests include connecting the hook material and the loop material of the hook-and-loop fastening system, followed by pulling the hook material laterally to the surface of the loop material. The maximum load required to separate the hook material from the loop material was recorded in grams.

 To carry out these tests, we used a tensile testing machine with a constant tensile speed of the samples, with a full scale of up to 5000 g, such as Syntech System 2, an integrated measuring system with a computer. A sample of loop material with dimensions of 75x102 mm was placed on a flat, sticky abutment surface. A sample of hook material with dimensions 45x12.5 mm, which was glued and ultrasonically bonded to a practically inextensible non-woven material, was laid on top and pressed to the upper surface of the sample loop material. To ensure adequate and uniform adhesion of the hook material to the loop material, a 2.4 kg hand press roller was used, which was rolled through five connected cycles of hook and loop materials, and one hand roll was rolled back and forth for alignment. One end of the nonwoven material carrying the hook material was fixed in the upper clamp of the tensile machine, and the end of the loop material directed toward the lower clamp was fixed in the lower clamp of the tensile machine. The fastening of the corresponding materials in the clamps of the tensile testing machine should be adjusted so that the minimum slack is in the corresponding materials before turning on the tensile testing machine. The hook elements of the hook material are oriented in a direction predominantly perpendicular to the intended directions of movement of the clamps of the tensile testing machine. The tensile testing machine operated at a moving clamp speed of 250 mm / min, and the maximum load in grams required to separate the hook material from the loop material was recorded.

Examples
A total of 18 samples of non-woven loop materials containing non-bonded sections arranged in accordance with a specific pattern, and 3 samples of comparative non-woven materials are presented below. Test materials containing non-bonded sections arranged in accordance with a specific pattern are made to illustrate specific embodiments of the present invention and to show a person skilled in the art how to carry out the present invention. Comparative Examples AC are designed to illustrate the advantages of the present invention.

Samples of non-woven loop materials containing non-bonded sections arranged in accordance with a specific pattern were all formed using the method and devices described herein and shown in FIG. 3-5. During the formation of each sample, the material containing non-bonded sections arranged in accordance with a specific pattern, spunbond fibrous canvas made of bicomponent filaments, or a laminate was passed through a sting of two heated fastening shafts rotating in opposite directions, including a patterned shaft and a support shaft. The outer surface of the patterned shaft contained supporting sections arranged in accordance with a specific pattern defining a plurality of individual holes. The supporting sections accounted for about 36% of the total outer surface of the patterned shaft. The holes in the patterned shaft were round and staggered in rows, had an average diameter of 4.06 mm, had a depth of 1.52 mm, and their density was 5 holes / cm ² . The center distance of the holes was 4.06 mm in the longitudinal direction and 4.83 mm in the transverse direction. The outer surface of the support shaft was substantially smooth.

Comparative Examples AC
Three single-layer spunbond fibrous webs of bicomponent filaments with different surface densities were formed from continuous crimped bicomponent filaments from a polymer melt, as described in US Pat. No. 5,418,045 to Pike et al. Polymeric components of bicomponent filaments were used in a ratio of 50: 50 (by weight) and are located in a side-by-side structure. Bicomponent filaments had a predominantly circular cross section. The polymer components were: a) Exxon Chemical Co. brand 3445 polypropylene. - 98% and titanium dioxide (TiO ₂ ) - 2%; b) 6811A normal chain low pressure polyethylene (LLDPE) - 98% and TiO ₂ - 2%, in which TiO ₂ is a concentrate containing 50% (by weight) TiO ₂ and 50% (by weight) polypropylene. The temperature of the cooling air under the die was about 15 ^° C. and the temperature of the exhaust air entering the fiber drawing chamber was 177 ^° C. The spunbond fibrous webs of the bicomponent filaments were thermally bonded after being formed to form a dot-bonded nonwoven material. the total bonding area of which was about 15%.

Example A
A single-layer spunbond fibrous canvas of bicomponent filaments from comparative example A was converted into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with a specific pattern described here. Both shafts: a patterned shaft and a support shaft - were heated to a temperature of about 126 ^o C. The sting pressure between the patterned and support shafts was about 28 kg / cm ² . After testing the materials of comparative example A and example A for the tear resistance and shear strength described above, the latter material contained significantly less free filaments in non-bonded areas, confirming the reduction in fiber elongation resulting from the use of the present invention.

Example B
A single-layer spunbond fibrous canvas of bicomponent filaments from comparative example A was converted into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with a specific pattern described here. The conditions for the formation of non-bonded sections located in accordance with a specific pattern were the same as in Example A described above, except that both shafts: patterned and support, were heated to a temperature of 128 ^o C. After testing the materials of comparative example B and example B on the resistance to peeling and on the shear strength described above, the latter material contained significantly less free filaments in non-bonded areas, confirming the decrease in fiber elongation resulting from those using the present invention.

Example C
A single-layer spunbond fibrous canvas of bicomponent filaments from comparative example C was converted into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with a specific pattern described here. The conditions for the formation of non-bonded areas placed in accordance with a specific pattern were the same as in example A described above. After testing the materials of comparative example C and example C for the tear resistance and shear strength described above, the latter material contained significantly less free filaments in non-bonded areas, confirming the reduction in fiber elongation resulting from the use of the present invention.

Example D
A single layer spunbond fibrous web of bicomponent filaments was formed from continuous crimped bicomponent filaments from a polymer melt, as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as in the examples described above. The spunbond fibrous canvas of bicomponent filaments was not thermally bonded after bonding.

A single-layer spunbond fibrous canvas of bicomponent filaments was transformed into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with the specific pattern described herein. The patterned and support shafts were heated to a temperature of 132 ^° C., the sting pressure between the patterned and support shafts was about 49 kg / cm ^2, and the linear speed of the spunbond fibrous web of bicomponent filaments at the inlet to the shaft sting was about 19 m / min.

Example E
A single-layer spunbond fibrous canvas of bicomponent filaments was formed as described in Example D above and converted into a nonwoven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections. arranged according to the specific pattern described here. The conditions for the formation of non-bonded sections arranged in accordance with a specific pattern were the same as in Example D described above, except that the linear speed of the spunbond fibrous web of bicomponent filaments at the entrance to the shaft sting was about 45 m / min

Example F
The two-layer nonwoven laminated material was fabricated using the first and second spunbond fibrous webs of bicomponent filaments formed from continuous crimped bicomponent filaments of polymer melt, as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments of individual nonwoven layers were such same as in the above examples. Not a single spunbond fibrous canvas of bicomponent filaments was bonded with thermally point bonding after formation. In this example, the surface density and dimensions of the bicomponent filaments from which the first and second spunbond fibrous webs of bicomponent filaments were formed were the same.

 The first spunbond fibrous canvas of bicomponent filaments was transformed into a non-woven layer containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with the specific pattern described herein. Then, a second spunbond fiber web was formed from bicomponent filaments and laid on top of the first fiber web containing unbonded portions arranged in accordance with a specific pattern, and the first and second non-woven layers were then joined together to form a laminate by passing through a unit to create a non-woven material containing non-bonded areas arranged in accordance with the specific pattern described herein. The conditions for the formation of non-bonded sections arranged in accordance with a specific pattern were the same as in Example D described above.

Example G
A two-layer non-woven laminated material was made using the first spunbond fibrous canvas from bicomponent filaments formed from continuous un twisted bicomponent filaments from a polymer melt, and the second spunbond fibrous canvas from bicomponent filaments formed from continuous crimped bicomponents polymer melt as described in US Pat. No. 5,418,045. Polymer components of bicomponent filaments of individual fibrous x The flats were the same as in the above examples. Not a single spunbond fibrous canvas of bicomponent filaments was bonded with thermally point bonding after formation. In this example, the surface density and sizes of bicomponent filaments, from which the first and second spunbond fibrous webs were formed from bicomponent filaments, differed in properties.

The first spunbond fibrous canvas of bicomponent filaments with a lower surface density, smaller fiber sizes was converted into a non-woven layer, containing: non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections located in according to the specific pattern described here. Then, a second spunbond fibrous canvas with a higher surface density was formed from bicomponent filaments with a higher linear density and laid on top of the first fibrous canvas containing unbonded sections arranged in accordance with a specific pattern. The second spunbond layer of bicomponent filaments was pre-bonded using a “hot air knife” located 38.1 mm above the surface to be processed on the second spunbond layer. A hot air knife directed the flow of air heated to a temperature of about 211 ^o C across the width of the spunbond canvases. The hot air pressure in the “hot air knife” collector was 2 mmHg. The first and second nonwoven layers were then joined together to form a laminate by passing through an aggregate to create a nonwoven fabric containing non-bonded areas arranged in accordance with the specific pattern described herein. The conditions for the formation of non-bonded sections arranged in accordance with a specific pattern were the same as in Example D described above, except that the patterned shaft and support shaft were heated to a temperature of about 128 ^° C. When tested for peeling resistance and for shear strength, the second spunbond fibrous canvas of bicomponent filaments was connected to the hook elements of the test hook material.

Example H
A single layer spunbond fibrous web of bicomponent filaments was formed from continuous crimped bicomponent filaments from a polymer melt, as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as in the examples described above. Spunbond fibrous webs of bicomponent filaments were pre-bonded using a hot air knife 44.5 mm above the upper surface of a spunbond fibrous canvas of bicomponent filaments. A hot air knife directed the flow of air heated to a temperature of about 211 ^o C across the width of the spunbond canvases. The hot air pressure in the “hot air knife” collector was 2 mmHg. The spunbond fibrous canvas of bicomponent filaments was not thermally bonded after bonding.

 A single-layer spunbond fiber canvas from bicomponent filaments was transformed into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with the specific pattern described herein. The conditions for the formation of non-bonded sections placed in accordance with a specific pattern were the same as in Example G described above, except that the linear speed of the spunbond fibrous web of bicomponent filaments at the entrance to the shaft sting was about 14 m / min

Example I
The two-layer non-woven laminated material was made using the first spunbond fibrous canvas from bicomponent filaments, formed from continuous un twisted bicomponent filaments from a polymer melt, and the second spunbond fibrous canvas from bicomponent filaments, formed from continuous twisted bicomponent polymer melt as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as in the above examples. Not a single spunbond fibrous canvas of bicomponent filaments was bonded with thermally point bonding after formation. In this example, the surface density and sizes of bicomponent filaments, from which the first and second spunbond fibrous webs were formed from bicomponent filaments, differed in properties.

 The first spunbond fibrous canvas of bicomponent filaments with lower surface density, smaller fiber sizes was formed. Then, a second spunbond fibrous canvas with a higher surface density was formed from bicomponent filaments with a higher linear density and laid on top of the first fibrous canvas containing unbonded sections arranged in accordance with a specific pattern. The second spunbond layer of bicomponent filaments was previously bonded in the same manner as described in Example G. Then, the first and second nonwoven layers were joined together to form a laminate by passing through an aggregate to create a nonwoven fabric containing non-bonded sections arranged in accordance with a certain the pattern described here. The conditions for the formation of non-bonded sections placed in accordance with a specific pattern were the same as in Example G. In the test for peeling resistance and shear strength, the second spunbond fibrous canvas of bicomponent filaments was connected to the hook elements of the test hook material.

Example j
The two-layer non-woven laminated material was made using the first spunbond fibrous canvas from bicomponent filaments, formed from continuous un twisted bicomponent filaments from a polymer melt, and the second spunbond fibrous canvas from bicomponent filaments, formed from continuous crimped bicomponent polymer melt as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as the above-described examples. Not a single fiber spunbond canvas of bicomponent filaments was bonded with thermally point bonding after formation. In this example, the surface density and sizes of bicomponent filaments, from which the first and second spunbond fibrous webs were formed from bicomponent filaments, differed in properties.

The first spunbond fiber canvas was formed from bicomponent filaments with lower surface density and smaller fiber sizes. Then, a second spunbond canvas with a higher surface density was formed from bicomponent filaments with a higher linear density and laid on top of the first nonwoven layer containing unbonded sections arranged in accordance with a specific pattern. The second spunbond layer of bicomponent filaments was pre-bonded in the same way as in example G described above, except that the "hot air knife" was located at a distance of 27.0 mm above the processed erhnostyu second batt and directed flow of air heated to a temperature of about 118 ^o C, the width of the nonwoven webs "spunbond". The first and second nonwoven layers were combined together to form a laminate by passing through the assembly to create a nonwoven web having unbonded portions, located in according to the specific pattern described here.The conditions for the formation of non-bonded sections placed according to the specific pattern were the same as in Example G, except that the grooved shaft and the support shaft were heated to a temperature of about 138 ^° C. and the sting pressure between the patterned and support shafts was about 56 kg / cm ² . When testing for peeling resistance and shear strength, the second non-woven fibrous canvas "spunbond" of bicomponent filaments was connected to the hook elements of the test hook material.

Example K
A single layer spunbond fibrous web of bicomponent filaments was formed from continuous crimped bicomponent filaments from a polymer melt, as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as in the examples described above. Spunbond fibrous canvas of bicomponent filaments was pre-bonded using a “hot air knife” under the conditions described in Example J, except that the “hot air knife” was spaced about 38.1 mm apart. The spunbond fibrous canvas of bicomponent filaments was not thermally bonded after bonding.

A single-layer spunbond fibrous canvas of bicomponent filaments was transformed into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with the specific pattern described herein. The patterned shaft and the support shaft were heated to a temperature of about 127 ^° C. The sting pressure between the patterned and the support shafts was about 49 kg / cm ² . The linear velocity of the spunbond fibrous web of bicomponent filaments at the entrance to the shaft sting was about 13 m / min.

Example L
A two-layer non-woven laminated material was made using the first spunbond bond fiber from bicomponent filaments formed from continuous un twisted bicomponent filaments from a polymer melt, and the second spunbond fibrous canvas from bicomponent filaments formed from continuous bent composite polymer melt filaments as described in US Pat. No. 5,418,045. Polymeric components of bicomponent filaments of individual fibers ies webs were the same as in the above examples.

 None of the spunbond fibrous webs of bicomponent filaments was bonded with thermally point bonding after formation. In this example, the surface density and sizes of bicomponent filaments, from which the first and second spunbond fibrous webs were formed from bicomponent filaments, differed in properties.

The first spunbond fibrous canvas of bicomponent filaments with lower surface density and smaller fiber sizes was formed. Then, a second spunbond fibrous canvas with a higher surface density was formed from bicomponent filaments with a higher linear density and laid on top of the first fibrous canvas containing unbonded sections arranged in accordance with a specific pattern. The second layer of "spunbond" of bicomponent filaments was pre-bonded using a "hot air knife", under the conditions fulfilled in example K described above. The first and second nonwoven layers were joined together to form a laminate by passing through an aggregate to create a nonwoven material containing non-bonded areas arranged in accordance with the specific pattern described herein. The patterned shaft and the support shaft were heated to a temperature of about 128 ^° C. The sting pressure between the patterned and the support shafts was about 56 kg / cm ² . The linear velocity of the spunbond fibrous web of bicomponent filaments at the entrance to the shaft sting was about 13 m / min. When testing for tear resistance and shear strength, the second fiber spunbond canvas of bicomponent filaments was connected to the hook elements of the test hook material.

Example M
The two-layer non-woven laminated material was made using the first spunbond fibrous canvas from bicomponent filaments, formed from continuous un twisted bicomponent filaments from a polymer melt, and the second spunbond fibrous canvas from bicomponent filaments, formed from continuous crimped bicomponents polymer melt as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as the above-described examples. Not a single spunbond fibrous canvas of bicomponent filaments was bonded with thermally point bonding after formation. In this example, the surface density and sizes of bicomponent filaments, from which the first and second spunbond fibrous webs were formed from bicomponent filaments, differed in properties.

 The first spunbond fibrous canvas was formed from bicomponent filaments with lower surface density and with smaller fiber sizes. Then, a second spunbond fibrous canvas with a higher surface density was formed from bicomponent filaments with a higher linear density and laid on top of the first fibrous layer containing non-bonded sections arranged in accordance with a specific pattern. A second spunbond layer of bicomponent filaments was pre-bonded using a “hot air knife” under the same conditions that were performed in Example L described above. The first and second nonwoven layers were joined together with the formation of the laminate by passing through the unit to create a nonwoven material containing unreinforced sections located in accordance with the specific pattern described here. The conditions for the formation of non-bonded sections placed in accordance with a certain pattern were the same as in Example L, except that the linear speed of the spunbond fibrous web of bicomponent filaments at the entrance to the shaft sting was about 21 m / min. When tested for peeling resistance and shear strength, a second fiber spunbond canvas of biocomponent filaments was connected to the hook elements of the test hook material.

Example N
A single layer spunbond fibrous web of bicomponent filaments was formed from continuous crimped bicomponent filaments from a polymer melt, as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as in the examples described above. Spunbond fibrous canvas of bicomponent filaments was pre-bonded using a “hot air knife” under the conditions described in Example K, except that the collector pressure was 2.6 mmHg. The spunbond fibrous canvas of bicomponent filaments was not thermally bonded after bonding.

A single-layer spunbond fibrous canvas of bicomponent filaments was transformed into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with the specific pattern described herein. The patterned shaft and the support shaft were heated to a temperature of about 128 ^° C. The sting pressure between the patterned and the support shafts was about 56 kg / cm ² . The linear speed of the spunbond fibrous web of bicomponent filaments at the entrance to the shaft sting was about 20 m / min.

Example O
A two-layer non-woven laminated material was made using the first spunbond fibrous canvas from bicomponent filaments formed from continuous crimped bicomponent filaments from a polymer melt, and a second spunbond fibrous canvas from bicomponent filaments formed from continuous crimped bicomponent elements polymer melt as described in US Pat. No. 5,418,045. Polymer components of bicomponent filaments of individual fibrous webs These were the same as in the above examples. Not a single spunbond fibrous canvas of bicomponent filaments was bonded with thermally point bonding after formation. In this example, the surface density and sizes of bicomponent filaments, from which the first and second spunbond fibrous webs were formed from bicomponent filaments, differed in properties.

The first spunbond fibrous canvas was formed from bicomponent filaments with lower surface density and smaller fiber sizes. Then, a second spunbond fibrous canvas with a higher surface density was formed from bicomponent filaments with a higher linear density and laid on top of the first fibrous canvas containing unbonded sections arranged in accordance with a specific pattern. The second spunbond layer of bicomponent filaments was previously bonded by passing the canvas through a sting between a pair of sealing or pressure shafts rotating in opposite directions. The pressure in the tip formed by the sealing shafts was about 53 kg / cm ² . The first and second nonwoven layers were joined together to form a laminate by passing through an aggregate to create a nonwoven material containing non-bonded areas arranged in accordance with the specific pattern described herein. The conditions for the formation of non-bonded areas placed in accordance with a specific pattern were the same as in Example M described above. When testing for tear resistance and shear strength, the second fiber spunbond canvas of bicomponent filaments was connected to the hook elements of the test hook material.

Example P
A single layer spunbond fibrous web of bicomponent filaments was formed from continuous un twisted bicomponent filaments from a polymer melt, as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as in the examples described above. Spunbond fibrous canvas of bicomponent filaments was pre-bonded using a “hot air knife”, which was located at a distance of about 28.6 mm from the upper surface of the fibrous canvas. The air flow exiting the nozzle of the “hot air knife” had a temperature of about 118 ^° C. The hot air pressure in the collector of the “hot air knife” was 2 mm Hg. Spunbond fibrous canvas of bicomponent filaments was not thermally bonded after normalization.

 A single-layer spunbond fiber canvas from bicomponent filaments was transformed into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with the specific pattern described herein. The conditions for the formation of unfastened sections placed in accordance with a specific pattern were the same as in example K described above.

Example Q
A two-layer non-woven laminated material was made using the first spunbond fibrous canvas from bicomponent filaments, formed from continuous un twisted bicomponent filaments from a polymer melt, and the second spunbond fibrous canvas from bicomponent filaments, formed from continuous uncoiled blended fibers polymer melt as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as to in the above examples. Not a single spunbond fibrous canvas of bicomponent filaments was bonded with thermally point bonding after formation. In this example, the surface density and sizes of bicomponent filaments from which the first and second fibrous canvases of spunbond from bicomponent filaments were formed, differed in properties.

 The first spunbond fibrous web of bicomponent filaments with lower surface density, smaller fiber sizes was formed and pre-bonded using a “hot air knife” under the same conditions as those performed in Example P described above. Then a second spunbond fibrous canvas of bicomponent filaments with a higher surface density, higher fiber parameters was formed and laid on top of the first non-woven layer containing non-bonded sections arranged in accordance with a specific pattern, and the first and second layers were joined together with the formation of the laminate by passing through the unit to create a non-woven material containing non-bonded areas located in accordance with a specific pattern described here . The conditions for the formation of non-bonded areas arranged in accordance with a specific pattern were the same as in Example L described above. When testing for tear resistance and shear strength, a second spunbond fibrous web of bicomponent filaments was connected to the hook elements of the test hook material.

Example R
A single layer spunbond fibrous web of bicomponent filaments was formed from continuous crimped bicomponent filaments from a polymer melt, as described in US Pat. No. 5,418,045. The polymer components of the bicomponent filaments were the same as in the examples described above. Spunbond fibrous canvas of bicomponent filaments was pre-bonded using a hot air knife under the conditions described in Example P, except that the “hot air knife” was located at a distance of about 17.8 mm from the surface of the fibrous canvas and pressure the collector was 1.4 mmHg. The spunbond fibrous canvas of bicomponent filaments was not thermally bonded after bonding.

 A single-layer spunbond fiber canvas from bicomponent filaments was transformed into a non-woven loop material containing non-bonded sections arranged in accordance with a specific pattern by using an aggregate to create a non-woven fabric containing non-bonded sections arranged in accordance with the specific pattern described herein. The conditions for the formation of non-bonded areas placed in accordance with a specific pattern were substantially the same as in Example K described above.

Example S
The two-layer non-woven laminated material was made using spunbond fibrous webs from bicomponent filaments with different surface densities formed from continuous bicomponent filaments from polymer melt, as described in US Pat. No. 5,418,045, issued to Pike et al. Polymeric components of bicomponent filaments were used in a ratio of 50:50 (by weight), located in a side-by-side structure. Bicomponent filaments had a predominantly circular cross section. The polymer components were: a) Exxon Chemical Co. brand 3445 polypropylene. - 99% and titanium dioxide (TiO ₂ ) - 1%; b) 7811A normal chain low density polyethylene (LLDPE) - 78% and KREMON ^® G-2755 polymer from Shell Chemical Co. - 10% and optical brightener SCC-5348 brand firm Standridge Chemical Co. from Social Circle, pcs. Georgia. The KRATON ^® brand block copolymer can be supplied in several different formulations, some of which are disclosed in US Pat. Nos. 4,663,220, 4323534, N 4834738, N 5093422 and N 5304599, incorporated by reference.

 Spunbond fibrous webs of bicomponent filaments were thermally bonded with dot bonding after forming to produce a nonwoven fabric with dot bonding, the total bonding area of which was about 35%.

 The samples and comparative materials described above had the following properties (see table).

Although special values of peel strength and shear strength have been achieved for the examples described above, a non-woven loop material containing non-bonded portions arranged in accordance with a specific pattern made in accordance with the present invention should not be limited to these values. Typically, loop material containing loose sections arranged according to a specific pattern should have a combination of tear resistance and shear strength that is suitable for the intended end use. More specifically, peel resistance in the range of about 50-500 g / m ² or higher is considered suitable for use in the present invention. Similarly, shear strengths in the range of 600-2500 g or higher are considered suitable for use in the present invention. Similarly, the total surface density of a loop material containing non-bonded portions arranged in accordance with a specific pattern can be matched to its proposed end use. A total surface density in the range of about 20-100 g / m ² or more, especially in the range of 20-70 g / m ² , is considered suitable for use in the present invention.

 It can be assumed that the loop material containing non-bonded sections arranged in accordance with a specific pattern made in accordance with the present invention can be designed and adapted according to the properties of an ordinary person skilled in the art to satisfy various levels of requirements for real use. Accordingly, although the present invention has been described with reference to the above embodiments and examples, it is obvious that the present invention may be further modified. This application, therefore, covers any options, uses or applications of the present invention in accordance with its main principles, including such deviations from the present disclosure of the invention that fall within the known or practiced in the field of production to which the present invention relates. and falls within the scope of the attached claims.

Claims (21)

1. Non-woven material containing non-bonded areas located in accordance with a certain pattern, containing the first fibrous canvas having a fibrous structure consisting of individual fibers or filaments, and a certain bulk of at least about 0.254 mm and a surface density of at least about 20 g / m ^2, and having on its surface a continuous bonded areas arranged according to a certain pattern defining a plurality of discrete unbonded areas, sp rmirovannyh by application of heat and pressure, the bonded area of the fibrous web is about 25 - 50%, and said individual fibers or filaments in the individual unbonded areas at least partially protrude in / secured in continuous bonded areas.  2. The nonwoven material according to claim 1, in which the fibrous canvas has a bonded area of about 36 to 50%.  3. The nonwoven material according to claim 1, having a shear strength of at least about 600 g and a tear resistance of at least 50 g.  4. The nonwoven material according to claim 1, in which the fibrous canvas contains filaments formed from a polymer melt.  5. The nonwoven material according to claim 1, in which the fibrous canvas contains staple fibers.  6. The non-woven material according to claim 4, in which the fibrous canvas contains multicomponent filaments, formed from a melt of polymers.  7. The nonwoven fabric according to claim 1, further comprising a film layer attached to the surface of the nonwoven fabric opposite the surface on which there are continuous bonded portions arranged in accordance with a specific pattern defining a plurality of individual non bonded portions.  8. The nonwoven material according to claim 1, containing a second nonwoven canvas having a fibrous structure consisting of individual fibers or filaments, the first and second fibrous canvases stacked on top of each other.  9. The nonwoven material of claim 8, in which the individual fibers or filaments of the first fibrous canvas have one linear density, and the individual fibers or filaments of the second fibrous canvas have a second linear density different from the first linear density, and the first fibrous canvas has one surface density, and the second fibrous canvas has a second surface density different from the first surface density.  10. A mechanical fastening system comprising: a male component; a female component suitable for interlocking with the male component, wherein the female component comprises a nonwoven material comprising non-bonded portions arranged in accordance with a specific pattern according to claim 1.  11. A disposable moisture-absorbing product containing a non-woven material containing non-bonded areas located in accordance with a specific pattern, according to claim 1.  12. A disposable moisture-absorbing product, comprising: a lining facing a user's body; outer coating material; an absorbent structure located between the lining and the outer coating material; a mechanically fastened strap connected to the product, wherein the fastened strap includes a male component; the female component attached to the outer coating material and suitable for interfacing with the possibility of separation with the male component, the female component comprising a non-woven material containing non-bonded portions arranged in accordance with a specific pattern according to claim 1.  13. A method of forming a non-woven material containing non-bonded areas arranged in accordance with a specific pattern, comprising the following steps: forming a first fibrous web having a fibrous structure consisting of individual fibers or filaments; the filing of the fibrous canvas in the sting formed by the opposing first and second shafts, the first shaft having a patterned outer surface, and the second shaft having a smooth outer surface; rotation of the first and second shafts in opposite directions; bonding a fibrous web by applying heat and pressure to form a pattern of continuous bonded sections on the surface of the canvas, defining a plurality of individual non-bonded sections; while the bonded area of the fibrous canvas is about 25 - 50%; at least a portion of individual fibers or filaments in separate non-bonded sections protrudes into / and is fixed in continuous bonded sections.  14. The method according to item 13, also containing the following steps: feeding the fibrous canvas into the sting between the first and second shafts, the first and second shafts having a patterned outer surface; bonding a fibrous web by applying heat and pressure to form at least two surfaces of the web of a pattern of continuous bonded portions defining a plurality of individual non bonded portions.  15. The method of claim 13, further comprising the steps of: forming a second fibrous web having a fibrous structure of individual fibers or filaments; feeding the first and second fibrous canvases into the shaft tip; bonding the first and second fibrous webs together to form a non-woven laminated material containing non-bonded sections arranged in accordance with a specific pattern.  16. The method of claim 15, further comprising the steps of: forming a first fibrous web consisting of fibers or filaments of a first size and having a first surface density; the formation of a second fibrous canvas, consisting of fibers or filaments of a second size, different from the first size of fibers or filaments and having a second surface density different from the first surface density.  17. The method according to item 13, also containing the step of preliminary bonding the first fibrous canvas.  18. The method of claim 15, further comprising the step of pre-bonding at least one of the first or second fibrous webs.  19. The method according to item 13, also containing the step of forming a non-woven layer containing filaments formed from a polymer melt.  20. The method according to claim 19, further comprising the step of forming a non-woven layer containing multicomponent filaments formed from a polymer melt.  21. The method according to claim 20, further comprising the step of forming a non-woven layer comprising multicomponent crimped filaments formed from a polymer melt.

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