MXPA02011281A

MXPA02011281A - Targeted elastic laminate.

Info

Publication number: MXPA02011281A
Application number: MXPA02011281A
Authority: MX
Inventors: Rhim Hannong
Original assignee: Kimberly Clark Co
Priority date: 2000-05-15
Filing date: 2001-05-15
Publication date: 2003-04-25
Also published as: DE10196199T1; GB0228523D0; WO2001087588A2; GB2378920A; AU2001263120A1; GB2378920B; KR20020091838A; WO2001087588A3

Abstract

A targeted elastic laminate material having different zones of tension across a width of a material roll and methods for making the same. In one embodiment, the targeted elastic laminate material has at least one low tension zone with first filaments having a first basis weight and at least one high tension zone having second filaments with a second basis weight greater than the first basis weight. The second basis weight is greater due to increased average thickness of the second filaments and or increased frequency of second filaments relative to the first filaments. In another embodiment, at least two polymers or polymer blends having different set properties are used to produce varying tension zones across the material. In yet another embodiment, the targeted elastic laminate material includes an elastic film with elastic strands placed thereon. The targeted elastic laminate material has elastic properties that provide improved fit characteristics to disposable personal care products.

Description

ELASTIC LAMINATE OF OBJECTIVE FIELD OF THE INVENTION This invention relates to elastic laminate materials having different zones of elastic tension across the width of the material and to the processes for making them.

BACKGROUND OF THE INVENTION Conventional elastic laminate materials exhibit a substantially homogeneous tension and fixing properties across the width of the material. These materials are often composed of either a continuous melt blown elastomer fabric or a series of identical elastomeric continuous filaments bonded to a meltblown elastomer fabric. A process for producing a continuous filament-bonded laminate is described in U.S. Patent No. 5,385,775, issued to Wright, the disclosure of which is incorporated herein by reference. Additionally, the reinforcing filaments have been produced independently of the spinning process of the elastomer for implement bands that have greater tension. However, this procedure is expensive and often results in uncomfortable material, In addition, when conventional elastic laminate materials are wound into rolls, the finished roll has variable diameters across the width of the roll, which results in tension and / or variable stretching across the width of the material. These variable diameters cause difficulties in the unraveling in the conversion process due to the tendency of the material to be directed through the guide rollers and not to lie flat on the cutting rollers.

For these and other reasons, there is a need for an objective elastic laminate material having different tension zones across the width of the material, which does not require separate steps to form high and low tension zones, for improved performance and appearance at a lower cost. In addition, there is a need for a less expensive and easier process to manufacture the elastic target material, compared to conventional processes for manufacturing conventional elastic laminate materials, by which the laminated material It can be rolled into a roll that has a uniform diameter across the width of the roll for an easier procedure.

SYNTHESIS OF THE INVENTION The present invention is directed to a resilient objective lens material (TEL) having at least one low voltage zone and at least one high voltage zone. The elastic target material may have a series of continuous elastomeric filaments attached to two confronting materials. In one embodiment, the at least one high tension zone may have a higher basis weight and the at least one low tension zone may have a lower basis weight, both formed from the same polymer material in the same extrusion step . In another embodiment, the at least one zone of low tension may have a plurality of first filaments made of a first elastic polymer or mixture of polymers, and the at least one zone of high tension may have a plurality of second filaments made of a second elastic polymer or mixture of polymers, both formed in the same extrusion step and stretched and attached to the two confronting materials. The high voltage zone of the material can having filaments made of a polymer or polymer mixture with a higher elastic tension than the filaments in the zone of low tension. A mixture of polymers in the high tension zone may include some of the same polymers as the polymer blend in the low tension zone, but with a different percentage of a second component. Alternatively, the polymer blends of the high and low tension zones may include different elastic base polymers.

The objective elastic material of the invention can be used for garments having one or more garment openings for the waist, legs, arms and similar of the user. These zones of high and low tension can be aligned strategically with the opening or openings of the garment. The objective elastic laminate can have an essentially homogeneous appearance, and it does not have a separately manufactured elastic band attached thereto. However, the objective elastic laminate may have different elastic properties in different regions, and exhibits higher elastic tension and / or greater elongation in a region aligned and close to at least one opening of the garment. The elastic laminate provides better adhesion to your surrounding fabric, a more similar to the fabric, it eliminates the sliding of elastic threads caused by the use of thicker elastic fibers; it provides advantages in its processing, such as the elimination of customary extrusion dies, and provides a better post-processing appearance, such as when cut to form smaller strips of elastic material, and will provide better performance in tension relaxation and Stretch as a result of rolling. In addition, the garment can be produced in accordance with the present invention without the use of a separately produced elastic band, and it is easier and less expensive to manufacture than a conventional garment having one or more elastic bands in the opening.

The high voltage zone and the low voltage zone can have widths of approximately 1.27 cm to 127 cm or greater, depending on the processing equipment and the anticipated application. For example, in a disposable absorbent article, such as a training pant, one or more high tension zones with a width of approximately 1.27 cm to 7.62 cm may be produced, adjacent to the zone of low tension that covers the rest of the width of the sheet of material. The high voltage zone can have a voltage of 1 to 8 times, alternatively approximately 2 to 4 times, greater than the tension of the zone of low tension, with an elongation of 50% of the fabric.

In one embodiment of the invention, the objective elastic laminate is made by a vertical filament-bonded laminate method (VF SBL). In another preferred embodiment, the objective elastic laminate is made by a continuous filament-bonded laminate method (CF SBL), which is a modification of the process described in United States Patent No. 5,385,775 issued to Wright. In any case, a first nonwoven fabric made of a single polymer or polymer blend contains a first zone of first filaments adjacent to a second zone of second filaments, the first and second zones having different average basis weights. The plurality of first filaments are extruded, cooled and stretched to form at least one zone of low tension and the plurality of second filaments are extruded, cooled and stretched to form at least one zone of high tension. The first and second filaments can be extruded through a single matrix. In order to manufacture the stretch-bonded lens elastic laminate, the filaments are stretched (eg, uniformly) to about 2 to 8. times its initial length. While the first non-woven fabric is in the stretched condition, polymeric layers that have not yet been stretched are laminated and attached to at least one and alternatively two. The laminate is allowed to retract, and has different tensions corresponding to the different zones.

In another embodiment of this invention, the attached-stretched laminate method of vertical filament or continuous filament-bonded laminate is modified to have first and second spinning systems with the first and second matrices positioned laterally adjacent to each other, producing a single weave having low tension zone filaments and high tension zone filaments of the same polymer or elastomeric polymer blend. The filaments in the high tension zone have a higher basis weight achieved by larger filaments or a higher frequency of filaments than filaments in the low tension zone. The second spinner used to form the high voltage zone has larger extrusion holes, and / or a higher orifice frequency, than the first spinner used to form the low voltage zone.

In still another embodiment of this invention, the second spinning system is replaced with a group of individually controlled matrix plates, placed sideways and / or downstream from the first die. The second spinning system allows the replacement of second filaments between and / or at the top of the first filaments to increase the base weight and tension in a desired fabric zone.

In still another embodiment of the invention, the elastomeric material may be a combination or composite of a film and elastomeric yarns having a better adhesion to the non-woven fiber fabrics laid to which it is applied. Alternatively, the elastic target material may be the incorporation of an elastomeric composite into a fabric of fibrous material used to make precursor garments. As another alternative, the objective elastic may be the incorporation of fibrous material with an integral composite elastomer within a finished garment.

These and other characteristics and advantages will be evident from the following detailed description of the currently preferred additions, read together with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of an elastic nonwoven layer including a plurality of first filaments forming at least one low tension zone and a plurality of second filaments forming at least one high tension zone extruded from a first matrix, in accordance with a preferred embodiment of this invention; Figures 2 and 3 are sectional views of an objective elastic laminate in which a barrier film is inserted into at least one of the high and low tension zones; Figure 4 is a sectional view of a resilient objective laminate material in which the non-woven fabric contains zones of high and low tension, achieved by using different densities of filaments; Figure 5 is a bottom plan view of a matrix plate from which the different base weights are achieved, which cause the high and low voltage areas through the different densities of filament; Figure 6 is a sectional view of an objective elastic laminate material, in which the non-woven fabric contains high and low tension zones achieved by using different sizes of filaments; Figures 7 and 8 are bottom plan views of the matrix plates from which the different base weights are achieved, which cause the high and low voltage zones through the different sizes of filaments; Figure 9 is a schematic view of an elastic nonwoven fabric including a plurality of first extruded filaments of a first matrix, which form at least one low tension zone, and a plurality of second extruded filaments of a second matrix, which form at least one high voltage zone, in accordance with a preferred embodiment of this invention; Figures 10 and 11 are sectional views of a resilient objective laminate material into which a barrier film is inserted in at least one of the high and low voltage areas; Figure 12 is a sectional view of an objective elastic laminate material in which the high and low tension zones are achieved by using different polymers or polymer blends; Figure 13 is a bottom plan view of a matrix plate useful for manufacturing non-woven fabrics having low and high tension zones; Fig. 14 is a sectional view of a resilient objective laminate material having high and low tension zones achieved by using different polymers provided from different matrix plates; Figures 15 to 19 illustrate representative examples of the elastic laminate materials of the present invention; Figure 20 is a schematic view of a continuous vertical filament process for producing a stretch-bonded objective elastic laminate, in accordance with an embodiment of this invention; Figure 21 is a schematic view of another vertical filament process for producing the stretched-attached objective elastic laminate, in accordance with another embodiment of the invention; Fig. 22 is a schematic view of another vertical filament process for producing the stretch-bonded objective elastic laminate, in accordance with another embodiment of the invention; Fig. 23 is a schematic view of another vertical filament process for producing the stretch-bonded objective elastic laminate, in accordance with another embodiment of the invention; Figure 24 is a schematic view of another continuous vertical filament process for producing the stretched-attached objective elastic laminate, in accordance with another embodiment of the invention; Fig. 25 is a schematic view of another vertical filament process for producing the stretch-bonded lens elastic laminate, in accordance with another embodiment of the invention; Figure 26 illustrates a representative process for making elastic laminate and elastic objective materials, useful for making garments in accordance with the invention; Figure 27 is a schematic view of another process for manufacturing the elastic laminate and the objective lens materials useful for manufacturing the garments in accordance with the invention; Figure 28 illustrates a side view of an extrusion die relative to the first roll, as can be used with the apparatus of Figure 26; Fig. 29 is a perspective view of a horizontal continuous filament process for producing the elastic bonded-stretched lens laminate, in accordance with an embodiment of this invention; Figure 30 is a perspective view of a hybrid horizontal continuous filament and the vertical filament process for producing the stretch-bonded objective elastic laminate; Figure 31 shows an exemplary adhesive spray pattern, in which the adhesive has been applied to the elastic filaments with an attenuation in the transverse direction; Figure 32 shows a second exemplary adhesive spray pattern; Figure 33 illustrates a third exemplary adhesive spray pattern; Figure 34 shows a fourth exemplary adhesive spray pattern in a swirl-type configuration. Figure 35 shows a fifth spray pattern of example adhesive that is more random and that it provides a higher percentage of adhesive lines in an orientation perpendicular to the elastic filaments; Figure 36 illustrates a sixth exemplary adhesive spray pattern having attenuation of adhesive lines in the cross machine direction; Figure 37 shows a seventh exemplary adhesive spray pattern that resembles a "wiring link"; Figure 38 shows an exemplary joining angle in an exemplary adhesive spray pattern; Figure 39 illustrates a joining pattern and method for calculating the number of joints per unit length of elastic strands or filaments; Figure 40 illustrates a perspective view of a panty-type absorbent garment according to the invention, having elastic target packing regions aligned with, and in the vicinity of the garment openings; Figure 41 is a plan view of the garment shown in Figure 40, which shows the far side of the wearer; Figure 42 is a plan view of the garment shown in Figure 40, which shows the side facing the wearer; Figure 43 illustrates a stress-relieving behavior of the objective elastic and non-elastic target materials at body temperature; Figure 44 illustrates the hysteresis behavior of the objective elastic and non-elastic target materials; Y Figure 45 illustrates the stretching performance to the top of the objective elastic and non-elastic objective materials.

DEFINITIONS The term "objective elastic laminate" or "TEL" refers to an elastic laminate having at least one elastic nonwoven filament fabric, in which there are different zones of different elastic tension across the width of the fabric when the laminate it stretches in a longitudinal direction perpendicular to the width. The different zones can, but not necessarily, have different elongations to the break or recoveries. What is important is that the different zones exhibit different levels of retraction force when the laminate is stretched uniformly by a certain amount. The elastic non-woven filament fabric is laminated to at least one other layer, whereby the laminate exhibits different levels of elastic tension in the zones corresponding to the high and low tension zones in the non-woven filament fabric.

The term "elastic bonded-stretched objective laminate" or "TE SBL" refers to an objective elastic laminate which is formed by stretching an elastic non-woven filament fabric having the zones of different elastic tension, which maintains the condition stretched from the elastic non-woven filament fabric when the other layer is joined thereto, and the relaxation of the elastic objective laminate after joining.

The term "vertical filament bonded-stretched laminate" or "VF SBL" refers to a bonded-stretched laminate made by using a continuous vertical filament process, as described herein.

The term "continuous filament bonded-stretched laminate" or "CF SBL" refers to a bonded-stretched laminate made by using a continuous horizontal filament process, as described herein.

The term "elastic tension" refers to the amount of force per unit width required to stretch the elastic material (or a selected area thereof) at a given elongation percentage.

The term "low voltage zone" or "lower voltage zone" refers to an area or region where the bonded-stretched laminate has one or more filaments with a characteristic of low elastic tension relative to the filament of the zone of high voltage, when applied a stretching or pushing force to the bonded-stretched laminate. In this way, when a pushing force is applied to the material, the low voltage zone will stretch more easily than the high voltage zone. At 50% elongation of the fabric, the high tension zone can exhibit an elastic tension of at least 10% higher, preferably 50% higher, and alternatively approximately 100-800% higher or approximately 150-300% greater than the low voltage zone.

The term "high voltage zone" or "highest stress zone" refers to an area or region where the bonded-stretched laminate has one or more filaments with a higher stress characteristic relative to the filament of the zone of low tension, when a stretch or pushing force is applied to the bonded-stretched laminate. In this way, when a pushing force is applied to the material, the high voltage zone will stretch less easily than the low voltage zone. Thus, high voltage zones have a higher voltage than low voltage zones. The terms "high voltage zone" and "low voltage zone" are relative, and the material can have multiple zones of different voltages.

The term "nonwoven fabric or fabric" means a fabric having a structure of individual fibers or filaments that are interlocked, but in a manner that can be identified as in a woven fabric. The terms "fiber" and "filament" are used interchangeably herein. Non-woven fabrics or fabrics have been formed from many processes such as, for example, meltblowing processes, carding and bonding processes, air laying processes, carded and bonded cloth processes. The term also includes films cut into narrow strips, punched or otherwise treated to allow passage of air therethrough. The basis weight of the non-woven fabrics is usually expressed in ounces of material per square yard (osy) or grams per square meter (gsm) and the diameters of the fibers are usually expressed in microns. (It should be noted that to convert from osy to gsm, you must multiply osy by 33.91) The term "microfibers" means small diameter fibers having an average diameter of no more than about 75 microns, for example, having an average diameter of about 1 miera to about 50 microns, and more in particular, having an average diameter of approximately 1 miera to 30 micras.

The term "spunbond fibers" refers to fibers of small diameter that are formed by extruding a molten thermoplastic material as filaments of a plurality of fine capillaries of a spinner member having a circular or different configuration, with the diameter of the filaments extruded, which is rapidly reduced, for example, in U.S. Patent No. 4,340,563 issued to Appel et al., U.S. Patent No. 3,692,618, issued to Dorschner et al.; U.S. Patent No. 3,802,817 issued to Matsuki et al., U.S. Patent Nos. 3,338,992 and 3,341,394 issued to Kinney, U.S. Patent No. 3,502,763 issued to Hartman, U.S. Pat. United States of America No. 3,502,538 granted to Petersen, and United States of America No. 3,542,615 issued to Dobo et al. The spun and tempered non-woven fibers generally do not stick to the surface when they are introduced into the extraction unit, or when they are deposited on the collection surface. The spunbond nonwoven fibers are generally continuous and may have average diameters greater than 7 microns, often between about 10 and 30 microns.

The term "meltblown fibers" means fibers formed by extruding a molten thermoplastic material through a plurality of matrix capillaries, usually circular, thin as strands or fused filaments into streams of a high-speed, convergent hot gas (FIG. for example, air), which attenuate the filaments or molten thermoplastic material to reduce its diameter, which can be a microfiber diameter. Then, the meltblown fibers are brought to a high velocity gas stream and are deposited on a collection surface to form a randomly dispersed fabric of meltblown fibers. Such a process is described, for example, in United States Patent No. 3,849,241 issued to Butin et al. Melt-blown fibers are microfibers that can be continuous or discontinuous, and generally have a diameter of less than 10 microns, and usually bind by themselves when deposited on the collection surface. The meltblown fibers used in the invention are preferably essentially continuous.

The term "polymer" generally includes but is not limited to, homopolymers, copolymers, including copolymers, alternating and random terpolymers, grafts or block, etcetera, and mixtures and modifications thereof. Also, unless specifically limited in some other way, the term "polymer" must include all possible geometric configurations of material. These configurations include, but are not limited to, isotactic, syndiotactic, and atactic symmetries.

The term "essentially continuous filaments or fibers" refers to filaments or fibers prepared by extrusion of a spinneret, including but not limited to spunblown or meltblown nonwoven fibers, which are not cut from their original length before being formed into a woven fabric. or nonwoven fabric. The essentially continuous filaments or fibers may have longer lengths ranging from about 15 cm or more than one meter, and up to a length of the nonwoven fabric or fabric to be formed. The definition of "essentially continuous fibers or filaments" includes those that are not cut before they are formed into a nonwoven fabric or fabric, but which are then cut when the fabric or non-woven fabric is cut.

The term "fiber" or "fibrous" refers to a particulate material, where the ratio of length to The diameter is such that the particulate material is approximately greater than 10. Conversely, a "non-fibrous" or "non-fibrous" material is intended to refer to a particulate material, wherein the length-to-diameter ratio is such that the particulate material is about 10 or less.

The term "elastic" or "elastomeric" is used interchangeably to mean a material that generally has the ability to recover its shape after deformation when the deformation force is removed. Specifically, as used herein, "elastic" or "elastomeric" has the meaning of being that property of any material in which when a pushing force is applied, it allows the material to be stretched to a stretched length by thrust that is less than about 50 times the length of the material. greater than its relaxed length not pushed, and which will cause the material to recover at least 40 percent of its elongation after releasing the elongation force by stretching. A hypothetical example that satisfies this definition of an elastomeric material would be one of (1) a 2.54 cm sample of a material that can be lengthened to at least 3.81 cm and that after lengthening to 3.81 cm and being released, will recover its length to do not more than 3.30 cm. Many elastic materials can stretch to more than 50% of their relaxed length, and many of them will essentially recover their original relaxed length after releasing the stretching or elongation force. This last class of materials is generally beneficial for the purposes of the present invention.

The term "recover" or "retract" refers to the contraction of a stretched material after the end of the pushing force that follows the stretching of the material by the application of the thrust force.

The term "series" refers to a group that includes one or more elements. " The term "fixed" refers to the difference between the elastic material before and after the pushing force is applied. It is measured as the percentage of the length of the original unstretched material. For example, when a 2.54 cm sample of elastic material is stretched to 3.81 cm, it is recovered to 3.04 cm after removing the pushing force, which will have a "fixation" of 20%.

The term "inelastic" refers to materials that are not elastic.

The term "gasket" or "gasket region" refers to a region of a garment that exhibits a moderate level of elastic tension against the wearer's body during use, and which restricts the flow of liquid or other material through the body. opening of the garment between the inside and the outside of the garment. The term "fluid seal" is synonymous with this term.

The term "objective elastic regions" refers to relatively narrow regions or areas, isolated in a single composite material or layer, which have a higher elastic tension and / or elongation than the adjacent or surrounding regions.

The term "elongation" refers to the ability of an elastic material to stretch at a certain distance, so that the greatest elongation refers to an elastic material with the ability to stretch at a greater distance than the elastic material having a lower elongation.

The term "stretch to the top" or "STS" indicates the percentage of elongation of the elastic material when placed under a tension load of 2000 grams.

The term "garment" includes personal care garments, medical garments and their like. The term "disposable garment" includes garments that are typically discarded after 1 to 5 uses. The term "personal care garment" includes diapers, training pants, swimsuits, absorbent protectors, incontinence products for adults, feminine personal hygiene products, and their peers. For other purposes of the invention, a baby cleanser can be considered as a personal care garment. The term "medical garment" includes gowns, caps, gloves, clothing, face masks, and their like for physicians (ie, protective and / or surgical). The term "industrial work pledge" includes lab coats, overcoats and their like.

The terms "inward" and "outward" refer to positions relative to the center of the article, and particularly in a transverse and / or longitudinal way more near or further from the transverse or longitudinal center of the article, and are analogous to the proximal and distal.

The term "film" refers to an article of manufacture whose width exceeds its height and provides the advantages and functional structures necessary to comply with the claimed invention.

The term "strand" refers to an article of manufacture whose width is less than a film and is suitable for securing with a film in accordance with the present invention.

The term "thermoplastic" refers to describing a material that softens when exposed to heat and that essentially returns to its original condition when cooled to room temperature.

The term "thermofixed" describes a material that has the ability to remain permanently crosslinked.

With respect to the term "cross-linking", even when linear molecules are important, they are not the only type of possible polymer molecules. The crosslinked and branched polymer molecules also play an important role in the structure and properties of polymers. When the additional polymer chains emerge from the main structure of the linear polymer chain, it is said to branch. Branching is intentionally introduced by adding monomers with the ability to act as a branch. The amount of branching introduced must be specified to fully characterize the polymer molecule. Branching points are called junction points. When the concentration of the binding sites is low, the molecules can be characterized by the number of chain ends. For example, two linear molecules have four chain ends. When one of these linear molecules joins half of the other linear molecule, the resulting structure resembles a "T". The total number of chain ends of this "T" molecule is three. The addition of another "T" at the end of another "T" will result in four chain ends. This process can continue until a critical concentration of the resulting binding points is reached. Another coupling of chain ends leads to a transition that transforms a soluble solvent and a processed branched polymer into thermal in a mass of insoluble or infused polymer. The number of binding points in such a mass becomes so high, so that the polymer molecule is theoretically considered to be a giant molecule having a three-dimensional network structure. When this condition is reached, it is said to be cross-linked. The polymer molecules can be cross-linked in different ways, by changing the chemistry or by irradiating it with high-energy rays such as ultraviolet, gamma rays, e-rays, etc. Some examples of chemical crosslinking are: 1) natural rubber, cis-1, -polyisoprene, crosslinked with sulfur. This was discovered by Goodyear in 1839. This reaction is also known as vulcanization; 2) vinyl polymers crosslinked with divinyl monomers, for example, polystyrene polymerized in the presence of divinyl benzene; 3) condensation polymers prepared from monomers of a functionality greater than double, for example, polyester formed with glycerol or tricarboxylic acid; and 4) polysilicones crosslinked by the reaction of benzoyl peroxide. An example of crosslinking by the high energy electron beam is the crosslinking of polyethylene by radiation.

Detailed Description of Current Preferred Incorporations In accordance with the invention, an objective elastic laminate material (TEL) is provided, which has different tension zones across its width. As shown in Figure 1, the objective elastic laminate includes an elastic nonwoven layer 6 which includes at least one low tension zone 10 having a plurality of first elastomeric filaments 12 and at least one high voltage zone 14 having a plurality of second elastomeric filaments 16. The first filaments 12 and the second filaments 16 may be made of the same elastomeric polymer or polymer mixture (ie, having essentially the same composition). Alternatively, the first filaments 12 and the second filaments 16 can be made of different polymers or polymer blends (ie have different compositions). The objective elastic laminate material can have multiple zones of high and low tension, and each zone can have a different average elastic tension and a different final elongation. Again, the tension of a material is the amount of force per unit width needed to stretch the material to a elongation determined. The final elongation is the final length per unit length in which a material can be stretched, without causing permanent deformation.

In one embodiment, at least one low voltage zone 10 is laterally adjacent to at least one high voltage zone 14. As shown in Figure 1, the plurality of first filaments 12 are extruded from a first matrix 30 to form the low tension zone 10. The plurality of second filaments 16 are extruded from a first die 30 to form the high voltage zone 14 adjacent laterally to the low voltage zone 10. In other embodiments, the low voltage zone 10 and the high voltage zone 14 are laterally spaced from one another. In another embodiment, at least a portion of the high voltage zone 14 overlaps with a portion of the low voltage zone 10.

Figures 2 and 3 show two embodiments of an objective elastic laminate material according to the invention. The different examples of processes for manufacturing the objective elastic laminate material are illustrated in Figures 20-23, 29 and 30. As shown in FIG.

Figures 2 and 3, the objective elastic laminate 5 can include a first confronting material 18 joined to a first side of the first filaments 12 forming the low voltage zone 10 and the second filaments 16 forming a high voltage zone 14 . The objective elastic laminate 5 may also include a second opposite facing material 20 attached to a second side of the first filaments 12 forming a low voltage zone 10 and second filaments 16 forming a high voltage zone 14. Each of the first material 18 confronted and a second material 20 confronted can comprise a nonwoven fabric, for example, a non-woven, spun or a meltblown fabric, a woven fabric, a film or a fabric composed of continuous filaments blown by melting. The first material 18 confronted and the second material 20 confronted can be formed by using conventional processes, including the processes of nonwoven, spinning and the meltblowing process, described in the above "DEFINITIONS". For example, the confronted materials may include a non-woven, spun fabric having a basis weight of about 0.1-4.0 osy, more suitably 0.2-2.0 osy or about 0.4-0.6 osy. The first material confronted and the second material 20 confronted can comprise the same or similar material or different material.

The first material 18 confronted and the second material 20 confronted can be joined to first filaments 12 and second filaments 16 by means of an adhesive, for example an elastomeric adhesive such as the Findley H2525A, H2525 or H2096. Other well-known joining means those of ordinary skill in the art can also be used to join the first confronted material 18 and the second material 20 confronted with the filaments 12 and 16, which include thermal bonding, ultrasonic bonding, mechanical sewing. and his peers.

In one embodiment of this invention, a barrier film 75, suitably a polymer film, more suitably a polyolefin film such as a polyethylene film, may be placed between the layers of first filaments 12 and / or second filaments 16 ( Figure 2) and / or between a layer of first filaments 12 and / or second filaments 16 and a first material 18 confronted and / or a second material 20 confronted (Figure 3).

Figures 4 to 8 illustrate various elastic objective laminates and matrix arrays useful for preparing the elastomeric nonwoven fabric 6. In the laminate of Figure 4, the nonwoven fabric 80 includes a plurality of elastic filaments of equal size arranged in a single row 83. In a higher tension region of the fabric 80, the filaments 16 are substantially uniformly separated and are relatively close each. In two regions 87 of lower tissue tension 80, the filaments 12 are substantially uniformly spaced but also separated from each other. The higher tension region 85 contains filaments 16 having a relatively higher density (i.e., relatively higher numbers of filaments per unit in cross-sectional area), which results in a non-woven fabric with a higher basis weight high and greater elastic tension. The lower tension regions 87 contain filaments 16 having a relatively lower density (i.e., relatively fewer filaments per unit area in cross section), which results in a nonwoven fabric with a lower basis weight and lower elastic tension . The nonwoven fabric 80 can be laminated between the facing layers 90 and 92, which may be of any of the materials described above. The filaments 12 and 16 can be extruded from different zones of a single matrix or matrix array, or from two or more different matrices.

Figure 5 illustrates a matrix incorporation 30, which operates to manufacture the nonwoven fabric 80 as shown in Figure 4. In Figure 5, the die openings 31 are arranged in two rows 33 and 39 instead 5 of one and are alternated so that the individual openings 31 of the row 33 are not directly over the openings 31 of the row 39. When the resulting nonwoven fabric comes into contact with the rollers or a conveyor, the extruded filaments may tend to 10 line up in a parallel way. The matrix openings 31 have a greater frequency in the central region 35 than in the end regions 37, corresponding to the desired variations for the density of the filaments.

In the laminate of Figure 6, the fabric 80 includes a plurality of filaments arranged in a single row 83. In this embodiment, the filaments 16 in the \ And central region (high voltage) of the tissue have a larger size than the filaments 12 in the regions 87 of 20 extreme (low voltage). The filaments 16 of larger diameter have a relatively larger size, which results in a nonwoven fabric with higher basis weight and higher elastic tension. The filaments 12 of smaller diameter have a smaller size, which results in a fabric nonwoven with a lower basis weight and lower elastic tension.

Figure 7 illustrates an incorporation of die 30, which operates to manufacture a nonwoven fabric 80 as shown in Figure 6. In Figure 7, the die openings 31 a and 31 b are arranged in two rows 33 and 39, in FIG. Place one and are alternated so that the individual openings 31a and 31b in row 33 are not directly over openings 31a and 31b of row 39. Again, when the resulting nonwoven fabric comes in contact with the rollers or conveyor , the filaments may tend to align in a parallel manner.

The matrix of Figure 8 illustrates how high and low voltage zones can be formed in a nonwoven fabric. A matrix core region 30 includes openings 31 of larger diameter and are used to produce a high voltage zone with a higher basis weight. Intermediate zones 41 located on both sides of the central region 35, include openings 31 of smaller diameter with large spaces between them, and are used to produce zones of lower tension, with lower basis weight. The first end zone 43, configured similarly to the central region 35 with larger diameter die openings, it is used to produce a zone of higher tension, with a higher basis weight in the resulting nonwoven fabric. The second end region 45, configured with smaller diameter die apertures spaced closer together, is also used to produce an area of higher tension, with a higher basis weight. In short, areas of higher basis weight and greater stress can be produced in the elastomeric non woven fabric by a) using filaments of any diameter but with a greater density of the non-woven fabric (more filaments per unit area in cross section) than in the zones of lower tension adjacent and / or b) when using filaments of a greater diameter than in the adjacent zones.

The first filaments 12 and the second filaments 16 may have the same or different base weights, the same or different average filament diameters, and the same or different filament densities (defined as the number of filaments per unit area in cross section) . The basis weight of the first and second filaments 12, 16 is expressed in grams per square meter (Gsm) or ounces of material per square yard (osy). The first and second filaments 12 and 16 can have a first basis weight of about 2 gsm to about 32 gsm, suitably from 4 gsm to about 30 gsm. An important feature of the invention is that the polymer or polymer mixture used to make the second filaments 16 may have a different tension (i.e. may present a different retraction force when stretched) than the polymer or polymer blend used to make the first filaments 12. In this way, the objective elastic laminate 5 can include a low voltage zone 10 having a first voltage and a high voltage zone 14 having a second voltage greater than the first voltage. A standard voltage test can be carried out in the low voltage zone 10 and in the high voltage zone 14, where a load applied to the material is measured as a function of the elongation. With a 50% elongation, the high voltage zone 14 has a second voltage of at least 10% higher, or alternatively 50% higher, better approximately 100-800% higher, or as another alternative approximately 125-500% greater or alternatively approximately 200-400% greater than the first voltage of zone 10 of low voltage. In this way, the low tension zone 10, when stretched, exhibits a lower retraction force than the high voltage zone 14.

In the embodiment shown in Figure 9, the plurality of first filaments 12 is extruded from first matrix sections 30 to form the low tension zone 10. The plurality of second filaments 16 is extruded from a second matrix section 36 to form the high voltage zone 14 laterally, adjacent to the low voltage zone 10. In another embodiment, the low voltage zone 10 and the high voltage zone 14 are separated from each other. In another embodiment, some or all of the high voltage zone 14 overlaps a portion of the low voltage zone 10.

Figures 10 and 11 show two embodiments of an objective elastic laminate material in accordance with this aspect of the invention. The different examples of the processes that can be used to make the elastic laminate lens material are illustrated in Figures 23-25. 29 and 30. As shown in Figures 10 and 11, a first confronting material 18 is attached to a first side of the first filaments 12 and the second filaments 16. The objective elastic laminate 5 can also include a second material 20 confronted opposed to a second side of the first filaments 12 and the second filaments 16. each of the first material confronted and the second material 20 confronted can be of any confronted material described with respect to the previous incorporations. Also, the first material 18 confronted and the second material 20 confronted can be joined to the first filaments 12 and the second filaments 16 by any technique described with respect to the previous incorporations.

In an embodiment of the invention, a barrier film 75, suitably a polymer film such as a polyethylene film, is placed between the layers of first filaments 12 and / or second filaments 16 (Figure 10) and / or between a layer of first filaments 12 and / or second filaments 16 and a first material 18 confronted and / or a second material 20 confronted (Figure 11).

Figures 12-14 illustrate some objective elastic laminates and a matrix array useful for preparing the elastomeric nonwoven fabric 6. In the laminate of Figure 12, the non-woven fabric 80 includes a plurality of elastic filaments 12 of lower tension, and elastic filaments 16 of higher tension arranged in a single row 83. In the region 85 of higher tension of the fabric 80, the higher tension elastic filaments (formed of an elastic polymer or polymer blend exhibiting a higher elastic tension) are arranged together and are essentially substantially uniformly spaced apart. In the two lower tension regions of the fabric 80, the plurality of lower tension elastic filaments 12 (formed from an elastic polymer or polymer blend exhibiting a lower elastic tension) are arranged together with each other, and are essentially separated from each other. uniformly. The filaments 12 and 16 can be extruded from different zones of a single matrix or matrix array or from two or more different matrices. The nonwoven fabric 80 may be laminated between the facing layers 90 and 92, which may be any of the materials described above.

Figure 13 illustrates an embodiment of a single matrix or matrix unit 30 that can be used to make the nonwoven fabric 80 similar to that shown in Figure 12. In Figure 13, the matrix openings 31 are arranged in two rows 33 and 39 instead of one, and are alternated so that the individual openings 31 in row 33 do not lie directly on the openings 31 in row 39. When the resulting non-woven fabric enters into.

In contact with the rollers or a conveyor, the extruded filaments may tend to align in a parallel fashion. The matrix openings 31 in the central region extrude the second filaments 16 of the second polymer or polymer mixture. The die apertures 31 in the end regions 35 and 37 extrude the first filaments 12 of the first polymer or polymer blend.

In the laminate of Figure 14, nonwoven fabric 80 is produced by using a two-die system, as described below, wherein a narrower band of filaments 16 of higher elastic tension is extruded over a wider band or filament fabric 12 with lower elastic tension. As a result, the highest tension zone 85 in the nonwoven fabric includes both the high voltage filaments 16 and the low tension filaments 12. The lower voltage zones 87 include only the lower voltage filaments 12.

In the embodiment shown in Figure 15, an elastomeric laminate 410 comprises an elastomeric film 412 having a first major surface 414 and a second major surface 416. Secured to the first main surface 414 are the strands 418 of elastomeric material. The longitudinal axes of the film 412 and the threads, collectively 418, run in the same direction, which is indicated as the Z direction in Figures 15 through 19, in the illustration. The elastomeric strands 418 are suitably, but not necessarily, secured to the film 412 by a combination of rubbers within the elastomeric compositions and with the application of a molten adhesive sprayed onto the main surface of the film. The right side 420 and the left side 422 of the film 412 may have a differential separation between their grouped strands respectively, which can impart a different level of tension between the two areas. It should be appreciated that the strands can be laid periodically, non-periodically and with various separations, clusters, sizes and compositions of elastic material according to the desired effect of the elastic laminate and the use for which it is made. For example, Figure 16 illustrates elastomeric strands 418 of unequal sizes with the left side group having a larger diameter and thus higher tension than the right side group of smaller diameter. While they are referred to as a different diameter, it should be appreciated that the elastomeric strands 418 need not have a circular cross section within the context of the present invention. Figure 17 illustrates that the strands of different sizes can be intermixed within groups in regular or irregular patterns. Figure 18 illustrates that the different strands 418 may be secured to both the first and second major surfaces 414, 416, respectively, of the film 412. Figure 19 illustrates that the laminate of the film 412 and the strands 418 may have an additional film 424 secured to the strands 418, which walls the strands 418 between the first film 412 or original and the second film 424. All of these prior techniques can be used as well as the bases in weight and the physical structure, for example the type of strand, film type or structure blown by cast, together with the chemical compositions of the laminate elements to vary the elastic tension of the laminate as a whole. Also, the tension in the different portions of the film 412 can be varied from one to the other. Also, better than a film 412, a web or non-woven sheet may be used instead, as the substrate for joining the strands 418.

The materials suitable for use in preparing the first filaments 12 and the second filaments 16, as well as the films and strands elastomeric, within the present include multi-block, two-block, three-block, four-block, etc. elastomeric copolymers such as olefinic copolymers, including styrene-isoprene-styrene, styrene-butadiene-styrene, styrene-ethylene / butylene- styrene, styrene-ethylene / propylene-styrene-ethylene / ropylenenetetrablock, or styrene-ethylene / propylene-styrene, obtainable from Shell Chemical Company, under the brand name elastomeric resin KRATON; polyurethanes including those available from B.F. Goodrich, Company, under the brand name thermoplastic polyurethanes ESTA E, polyamides, including polyether block amides available from Ato Chemical Company, under the brand name polyamide block amide PEBAX (); polyesters such as those available from E.l. DuPont de Nemours Co. , under the brand name HYTREL polyester; and catalyzed or single-site metallocene polyolefins having a density of less than about 0.89 grams / cc, available from Dow Chemical Co. , under the brand name AFFINITY. The different polymers or polymer blends used to prepare the first filaments 12 and the second filaments 16 may have the same elastomeric or similar properties.

A number of block copolymers can be used to prepare thermoplastic elastomeric filaments 12, 16, elastomeric strands 418, and films 412 useful for this invention. Such block copolymers generally comprise a portion B of elastomeric block medium and a portion A of thermoplastic block end. The block copolymers can also be thermoplastic in the sense that they can be melted, formed and re-solidified several times with little or no change in physical properties (assuming a minimum of degradation by oxidation).

The end-of-block portion A may comprise poly (vinylarene) as a polystyrene. The midblock portion B may comprise an essentially amorphous polyolefin such as a polyisoprene, ethylene / propylene polymers, ethylene / butylene polymers, polybutadiene and their like and mixtures thereof.

Block copolymers useful for this invention include at least two block end portions essentially of polystyrene and at least one block half portion of essentially ethylene / butylene.

A commercially available example of such a linear block copolymer is available from Shell Chemical Company under the brand name elastomeric resin KRATON G1657. Other suitable elastomers include KRATON® G2760 and KRATON® G2740, both also available from Shell Chemical Company.

Other suitable elastomeric polymers can also be used to make thermoplastic elastomeric filaments 12, 16, including, without limitation, polypropylene (catalyzed or single site metallocene), polyethylene and other alpha-olefin homopolymers and copolymers, which have a density less than about 0.89 grams / cc; ethylene vinyl acetate copolymers; and essentially amorphous copolymers and terpolymers of ethylene-propylene, butene-propylene and ethylene-propylene-butene.me.

Single-site catalyzed elastomeric polymers (eg, of constrained geometry or metallocene-catalyzed elastomeric polymers) are available from Exxon Chemical Company of Bayton, Texas and Dow Chemical Company of Midland, Michigan. The simple site process for making polyolefins uses a catalyst simple site that is activated (ie ionized) by a co-catalyst.

The commercial production of single-site catalyzed polymers is somewhat limited, but is growing. Such polymers are available from Exxon Chemical Company under the brand name EXXPOL for polymers based on polypropylene and EXACT CR) for polymers based on polyethylene. The Dow Chemical Company has polymers available for sale under the brand name ENGAGE. It is believed that these materials are produced using selective non-stereo simple site catalysts. Exxon in general, refers to its simple site catalyst technology as metallocene catalysts, while Dow refers to its technology as catalysts for "Restricted geometry" under the brand name INSITE to distinguish them from the traditional Ziegler-Natta catalysts, which have multiple reaction sites. Other manufacturers such as Fina Oil, BASF, Amoco, Hoechst, and Mobil are active in this area and it is believed that the availability of polymers produced in accordance with this technology in the next decade will be increased.

Alternatively, the elastomeric strands 418 and / or films 412 can be made from a polymer that is not thermally processable, such as the LYCRA® spandex available from E.l. DuPont de Nemours, Co. , or natural rubber crosslinked in film or fiber form. Thermoforming polymers and polymers such as spandex, unlike thermoplastic polymers, once crosslinked can not be processed in thermal form, but can be obtained in reel or other form and can be stretched and applied to film 412 or strands 418 in the same way as thermoplastic polymers. As another alternative, the elastomeric strands 418 and / or films 412 can be made from a thermosetting polymer, such as AFFINITY, available from Dow Chemical Co., which can be processed as a thermoplastic, i.e., stretched and applied, and then be treated with radiation, such as electron beam radiation, gamma radiation, or ultraviolet radiation to crosslink the polymer, or use polymers that have built-in functionality, so that they can be cured by moisture to cross-link the polymer, which results in a polymer with improved thermosetting properties.

The first filaments 12 and the second filaments 16 may also contain mixtures of elastic and non-elastic polymers, or two or more elastic polymers, since the mixture exhibits elastic properties. The first filaments 12 and the second filaments 16 or strands can be essentially continuous or of a specific length, but desirably is continuous better. The essentially continuous filaments have a better elastic recovery than the shorter filaments. The first filaments and the second filaments 12 and 16 may be circular, but may also have other geometries in cross section such as ellipse, rectangular, triangular or multiple lobes. The first filaments and second filaments 12, 16 or strands may have the same or different geometry, and the same or different size (for example, diameters), and the same or different density (expressed in number of filaments or unit of area in section) crosswise through the tissue). In one embodiment, one or more filaments may be in the form of elongated, rectangular film strips produced from a film extrusion die having a plurality of slotted apertures.

As mentioned, in one embodiment, the first filaments 12 can have a basis weight and the second filaments 16 can have a second basis weight greater than the first basis weight. In this incorporation, the second basis weight is suitably at least 10% greater than the first basis weight, preferably at least 50% higher, or 100-800% higher, alternatively, 125-500% higher or as another alternative 200-400% higher The first filaments 12 can have a basis weight of about 2 grams per square meter (gsm) to about 14 gsm, or about 4 gsm to about 12 gsm, preferably 12 gsm to about 30 gsm. In this way, the objective elastic laminate 5 has a low voltage zone 10 having a first voltage and a high voltage zone 14 having a second voltage greater than the first voltage.

Elastic tension can be measured, for example, using a Model 1 / s Sintech MTS available from MTS in Research Triangle Park, North Carolina, with a cross head speed of 500 mm / min. Samples that have a width of 7.62 cm to 15.24 cm can be used, with 7.62 cm of the length held within the clamps (which leaves 7.62 cm in length for the test). The tension of each The high and low voltage region can be measured after the portion of the objective elastic laminate to be tested is maintained in the extended condition (in the machine direction of the objective elastic laminate) for 60 seconds.

Referring again to Figures 2 and 3, the second basis weight of the second filaments 16 may be greater than the first basis weight of the first filaments 12, as a result of the increase in the diameter of the spinning orifices 31 in the region of higher basis weight, as explained above with reference to Figures 6 and 7. The first average thickness (e.g., diameter) of the first filaments 12 and the second average thickness (e.g., diameter) of the second filaments 16 it can be from about 0.025 cm to 0.101 cm, preferably 0.050 cm to about 0.081 cm. In case the filaments 12 and 16 have approximately the same density (expressed as the number of filaments per unit area in cross section), the second filaments 16 should have an average diameter of at least 5% higher, preferably at least 20% higher, or 40-300% higher, alternatively 50-125% higher or as another alternative 75-100% higher than the average diameter of the first filaments 12.

Alternatively, as explained with respect to Figures 4 and 5, the second basis weight of the second filaments 16 may be greater than the first basis weight of the first filaments 12 as a result of an increase in frequency of the holes 31 of spun in a second region 37 of the turntable. The first filaments 12 can have a first frequency and the second filaments 16 can have a second frequency of about 4 holes per square inch ("hpi") at about 40 hpi, or about 12 hpi at about 30 hpi. If it is assumed that the filaments 12 and 16 have the same diameter, the second frequency should be at least 10% higher, preferably 50% higher, or 100-800% higher, alternatively 125-500% higher, or as another alternative 200-400% greater than the first frequency.

As mentioned, in another embodiment, the first filaments 12 comprise a first elastomer or elastomer mixture, and the second filaments 16 comprise a different elastomer or mixture of elastomer, with different tensile properties than the first elastomer or elastomer mixture. In another desired embodiment, the first filaments 12 comprise a first elastomer and the second filaments 16 comprise an elastomer mixture having a different amount in percentage of the first elastomer, with an added non-elastic component, which makes the modulus of the second elastomer elastomer mixture greater than the first elastomer module. For example, the second filament may comprise KRATON G1730 as a base elastomer, and a polyethylene wax as a cooperator in the processing. The first filaments may include the same base elastomer without the polyethylene wax, or with a smaller amount thereof. The combination of a higher modulus with higher setting properties of the second filaments provides a target 5 elastic laminate with second higher tension filaments that can be rolled on a roller with a flat profile.

In another desired embodiment, the second filaments 16 may comprise a mixture of elastomers, for example rubber KRATON "of styrene-ethylene / propylene and a polyethylene elastomer, having a modulus and / or basis weight (and therefore, a tension) greater than a modulus and / or basis weight of a first elastomer used to form the first filaments 12. The additive of the polyethylene elastomer increases the modulus and achieves the desired setting properties for the second filaments 16, while acting as a cooperator in the prosecution. This combination of first and second filaments produces an objective elastic laminate material that can be rolled onto a roller with a flat profile. More specifically, a target 5 elastic laminate having a high tension zone with less retraction than a low tension zone allows the objective elastic laminate to be wound on a roller, so that the roller has a uniform diameter to through the width of the roller, so that when the elastic objective laminate is unwound from the roller, it is flat on a processing surface.

In an embodiment of this invention, the objective elastic laminate 5 is produced by a continuous, vertical filament-bonded laminate method (VF SBL), as shown in Figures 20 to 23. With reference to Figure 20 , an extruder (not shown) supplies the molten elastomeric material to a first matrix 30. The first matrix 30 includes different regions of spinning holes adapted to provide the non-woven fabric 6 with smaller and larger zones of elastic tension, having smaller and larger weight bases as explained with respect to Figures 4 to 8.

With reference to Figure 20, the molten elastomeric material is extruded from a first turntable region 32 through the spin holes as a plurality of first elastomeric filaments 12 (preferably continuous). Similarly, a plurality of second elastomeric filaments 16 (preferably continuous) of the same polymer material are extruded from the second turntable region 34 through the spin holes of different average diameter and / or frequency. The resulting nonwoven layer 6 has a higher basis weight in the area defined by the second filaments 16, than the area defined by the first filaments 12. The different bases in weight are selected to provide the different elastic stresses desired. After extruding the first filaments 12 and the second filaments 16, the first and second filaments 12, 16 are annealed and solidified.

In another embodiment of this invention, the objective elastic laminate 5 is produced by a continuous, vertical filament-bonded laminate method (VF SBL), as shown in Figures 24 and 25. With reference to Figure 24, a first extruder (not shown) supplies a first molten elastomeric polymer or polymer blend to a first matrix 30. A second extruder (not shown) supplies a second molten elastomeric polymer or polymer blend to a second matrix 36. The first matrix 30 Extrudes the elastomeric filaments 12 (desirably continuous) of lower tension. The second die 36 extrudes elastomeric filaments 16 (preferably continuous) of higher tension. The strand bands 12 and 16 can be joined together side by side to form a nonwoven layer 80 as shown in Figure 12, which has homogeneous low and high voltage regions 85 and 87. Alternatively, a narrower band of larger elastomeric filaments 16 can be extruded onto a wider band of filaments 12 to form a nonwoven layer 80 having a heterogeneous region of higher tension and homogeneous regions 87 of lower tension as shown in Figure 14.

After extruding the first and second filaments 12, 16, the first and second filaments 12, 16 are hardened and solidified. In a desired embodiment, the first and second filaments 12, 16 are hardened and solidified as the first and second filaments pass over a first series of cooling rollers 44. The first series of cooling rollers 44 may comprise one or more individual rollers 45, preferably at least two cooling rollers 45 and 46, as shown in Figures 30 and 24. Any number of cooling rollers may be used. For example, the first filaments 12 may come into contact with the cooling roller 46. The second filaments 16, which have a higher aggregate basis weight, can pass over two cooling rollers 45 and 46. The cooling rolls 45 and 46 can have a temperature of about 4.44 ° C to about 15.55 ° C.

The die of each extruder can be positioned with respect to the first roll so that the continuous filaments find this first roll at a predetermined angle of 47, shown in Figures 20 and 24. The extrusion geometry of the yarn is particularly advantageous for depositing the molten extrudate on a roller or rotating drum. An angled or chanted orientation provides the option for the filaments to exit the matrix at a right angle to the tangent point of the roller, which results in improved spinning, more effective energy transfer, and generally lengthens die life. This improved configuration allows the filaments to exit at an angle from the die and follow a relatively straight path to contact the tangent point on the roll surface. The angle 47 between the die exit of the extruder and the vertical axis (or the horizontal axis of the first roller, depending on the angle measured) can be as small as a few degrees or as much as 90 °. For example, an extruder outlet at 90 ° to the roll angle can be achieved by placing the extruder directly on the downstream edge of the first roll and having a die tip on the side outlet of the extruder. In addition, angles of approximately 20 °, approximately 35 ° or approximately 45 ° away from the vertical can be used. It has been found that by using a hole density of the turntable of 12 filament / inch, an angle of approximately 45 ° (shown in Figures 20 and 24) allows the system to operate effectively. However, the optimal angle will vary as a function of extrusion exit velocity, roller speed, vertical distance from the die to the roll, and horizontal distance from the die centerline to the top dead center of the roll. Optimum performance can be achieved by using different geometries to result in improved yarn effectiveness and reduced filament breakage. In many cases, this results in a potentially increased roll wrap, which results in a better energy transfer, and a longer die life due to reduced drag and cut of the extruder as it leaves the extruder die capillaries and proceeds to the roll Cooling.

After the first and second filaments 12, 16 are hardened and solidified, the first and second filaments 12, 16 are stretched or elongated. In a desired embodiment, the first and second filaments 12, 16 are stretched using a first series of stretching rollers 54. The first series of stretching rollers 54 may comprise one or more individual stretching rollers 55, preferably at least two stretching rollers 55 and 56, as shown in FIGS. 20 and 24. The rollers 55 and 56 of FIG.

Stretches rotate at a speed greater than the speed at which the cooling rollers 45 and 46 rotate, which stretches the first and second filaments 12, 16.

In an embodiment of this invention, each successive roller rotates at a speed greater than the speed of the previous roller. For example, with reference to Figure 20, the cooling roller 45 rotates at a speed "x", the cooling roller 46 rotates at a speed greater than "x", for example approximately "l.lx"; the stretching roller 55 rotates at an even higher speed, for example approximately "1.15x"; the second stretching roller 56 rotates at a higher speed, for example approximately "1.25x" to approximately "2x"; and the third stretching roller 57 (when it exists, as in Figure 25) rotates at an even higher speed, for example approximately "2x" to approximately "7x". As a result, the first and second filaments 12, 16 can be stretched from about 100% to 800% of an initial length without stretching, preferably from about 200% to 700% of the initial length without stretching.

After the first and second filaments 12, 16 are stretched, the elastic non-woven fabric 6, it is laminated with a first material 18 confronted and (alternatively) with a second material 20 confronted. The first confronting material 18 is unwound from one of the rollers 62 and is laminated to a first side of the nonwoven layer 6. The second confronting material 20 is unwound from one of the rollers 64 and is laminated to a second side of the nonwoven fabric 6. As shown in Figure 20, before the second confronted material 20 is laminated to the second side of the elastic non-woven layer 6, at least a portion of the second confronted material 20 can be coated or sprayed with an elastomeric adhesive 21 , such as the Findley H2525AA, H2525 or H2096, by means of an adhesive sprayer 65. The rolled material is then passed through rolling rolls 70. The laminate is then relaxed and / or retracted to produce the objective lens laminate 5. Other means known to those of ordinary skill in the art can be used in place of the roll 70.

Figure 21 illustrates a VF SBL process similar to that of Figure 20. In Figure 21, instead of using a single row 30 with adjacent matrix regions for the high and low tension filament zones, two rows 30 and 30 are employed. 36. The first row 30 extrudes the first filaments 12. Second row 36 extrudes second filaments 16. Again the first and second rows differ with respect to the aggregated weight bases of the elastomeric filaments produced. The second row 36 can have matrix openings of a) a higher frequency and / or b) a larger diameter, that the die openings of the first row 30. Except for the use of two rows instead of a "hybrid" row, the processes of Figures 20 and 21 are similar. In any case, the first filaments 12 and the second filaments 16 finally converge to form a single elastic non-woven layer 6 having areas of lower and greater elastic tension. The filaments 12 and 16 can converge in a side-by-side configuration as shown in Figure 1, for example to produce at least a minor basis weight, a zone 10 of lower tension, and at least a zone 14 with basis weight older, more stressed. Alternatively, the bands of the filaments 12 and 15 can have different widths so that the narrower layer or band of the second filaments 16 is superimposed directly on a wider layer band of the filaments 12, so that the area of greater tension occurs when two layers coexist. In any process, the first filaments 12 and the second filaments 16 can converge as shown, on the cooling roller 46.

Figure 22 illustrates a VF SBL process wherein the second filaments 16 are extruded, cooled and stretched independently of the first filaments 12. The first filaments 12 are processed in a manner similar to that described with respect to Figure 20. The first filaments 12 are extruded from the die 30, quenched using the cooling rollers 45 and 46 and stretched using the end rollers 59 and 60. The first filaments 12 and the second filaments 16 converge on the rolling rolls 70 to form a nonwoven layer 6 as described above, which is laminated simultaneously between a first confronted layer 18 and a second confronted layer 20. The resulting laminate relaxes and / or retracts to form the objective 5 elastic laminate. Except for the separate extrusion cooling and stretching of the first and second filaments 12 and 16, the VF SBL process of Figure 22 is similar Figure 20. An advantage of the process of Figure 22 is the possibility of having filaments 12 and 16 stretched by different amounts before lamination with the confronted layers.

Figure 23 illustrates a VF SBL process where draw rolls 54 are not used. Instead, the first filaments 12 are extruded onto the cooling roller 46. The second filaments 16 are extruded onto the cooling roller 45, wherein the first filaments 12 and the second filaments 16 converge to form a single elastic nonwoven layer 6 having areas of lower and greater elastic stresses. The first and second filaments 12, 16 are stretched between the cooling rolls 45, 46 and the rolling rolls 70. With the exception of the lack of the stretching rolls 45, the processes of Figures 21 and 22, as well as Figures 22 and 24, are similar. In any case, the elastic non-woven layer 6 is laminated between a first facing layer 18 and a second facing layer 20 in the rolling rolls 70. The resulting laminate relaxes and / or retracts to form the objective 5 elastic laminate.

Figure 26 illustrates a method and apparatus for making an elastic laminate in accordance with Figures 15-18 and forming an elastic target material from the elastic laminate. The double film laminate of Figure 19 will, of course, have another line added for form the second movie. While Figure 26 illustrates a composite VF SBL process, it will be appreciated that other processes consistent with the present invention can be used. A first extruder 426 produces strands of elastic material 428 through filament matrix 427. The strands 428 are fed to a first roller 430 and stretched vertically to the contraction point 432 by one or more of the first draw rolls, collectively 434, on the strand-producing line.

A second extruder 436 that uses a matrix 437 slotted film produces a film of material 438 elastic, for example, 19.05 cm wide and ten (10) mils thick, which is fed to a second roller 440 and conveyed in one or more of the second draw rolls, collectively 442, to the contraction point 432. The film 438 can be stretched down about 5.08 cm wide and is thinned to about 2 mils by the second of the stretching rollers 442 as it passes through the contraction point 432. The contraction point 432 is formed by the first and second contraction rollers 444 and 446, respectively. The elastic laminate 410 (Figure 15) is form by securing the strands 428 to the film 438 at the contraction point 432 by heat, pressure, adhesives or combinations thereof. The adhesive sprinklers, collectively 447, can be placed as desired in each material path before entry to the point of contraction.

Figure 27 illustrates a VF SBL process where the draw rolls 434 are not used. Instead the film 438 is extruded onto the cooling roller 440. The strands 428 are extruded onto the cooling roller 430, where the strands 428 and the film 438 converge. The strands 428 and the film 438 are stretched between the cooling rolls 430, 440. With the exception of the lack of the stretching rolls 434, the processes of Figures 26 and 27 are similar. In any case, the strands 428 and the film 438 are laminated together between a first facing layer 452 and a second facing layer 454 at the contraction point 432.

Figure 28 illustrates a side view of an extruder 15 in a tapered position relative to the vertical axis of a roller 12. It has been found that the angle at 45 ° indicated in the Figure is an angle that produces a acceptable product and that allows the continuous filaments to coincide with the roller 12.

In order to form a target elastic material 456, first and second rollers 448 and 450, respectively, of a confronted material 452 and 454 of non-woven yarn, is supplied at the contraction point 432 on either side of the strands 428 Elastic and film 438 and they are joined according to the same. The confronted, spun, non-woven material can also be made in your own better than unrolling the previously made rolls of material. While illustrated by having two spun, non-woven faces that can be joined together, of light weight, it will be appreciated that only one confronted material, of various types of confronting materials, can be used. The attached objective 456 elastic material is held in the stretched condition by a pair of tension rollers 458 and 459 downstream of the point of contraction and then relaxed as Ref. No. 457.

Each of the layer or layers 452, 454 confronted can include any of the confronted materials described with respect to the previous incorporations. Also, the confronted materials 452, 454, are they can join the elastomeric laminate 410 when using any of the techniques described with respect to the previous incorporations.

Figure 29 illustrates a continuous, horizontal filament-bonded laminate (CF SBL) process 100 for making the objective elastic laminate of the invention. A first extruder apparatus 130 (which can be a spinneret, as described above) is supplied with an elastomeric polymer or polymer blend from one or more sources (not shown). In several embodiments, the extrusion apparatus 130 may be configured in accordance with the non-woven fabric and array of array holes illustrated in Figures 4 through 8, and described above, or similar arrangements, to form a non-woven layer 106. which has areas of greater and lesser elastic tension. In another embodiment, the extruder apparatus 130 can be configured with matrix holes of uniform size and spacing, to produce a non-woven layer 106 having a uniform elastic tension across its width.

The nonwoven layer 106 contains first filaments 112 that are essentially continuous in length. With respect to this, the extrusion apparatus 130 can be one row. Suitably, the apparatus 130 is a meltblown swath that operates without a stream of hot gas (e.g., air) flowing past the die tip in a conventional meltblowing process. The apparatus 130 extrudes filaments 112 directly on a conveyor system, which may be a cable-forming system 140 (ie, a forming band) which is rotated clockwise around the rollers 142. The filaments 112 may be cooled by using a vacuum suction applied through the cable-forming system, and / or cooling fans (not shown). The vacuum can help keep the non-woven layer 106 against the wire forming system.

In a desired embodiment, at least possibly two or more extrusion apparatuses 136 are placed downstream of a first extrusion apparatus 130. The second extrusion apparatus creates one or more high tension zones in the nonwoven layer 106 by extruding second filaments 116 of elastic material directly into the nonwoven layer 106 in bands or zones that are narrower than the width of the layer 106 not woven. The second filaments 116 may be of the same or different elastic polymer construction, and / or the same or different size and bases by weight, as the first filaments 112. Extrusion of the second filaments 116 on the first filaments 112 only in the selected regions of the layer 106, operates to create zones 115 of higher elastic tension, where the first filaments 112 exist by themselves. The first and second filaments 112 and 116 converge and combine in the forming conveyor 140 as they travel forward, to produce the nonwoven layer 108 having at least a first zone 110 of lower elastic tension, and at least a second zone. 114 of higher elastic tension.

As explained above, the non-woven layer 108 can be produced either a) directly on row 130, which is configured to produce areas with bases by weight and with an elastic tension similar to Figures 4 to 8; b) through the combined effect of row 130 as a non-uniform or uniform matrix and secondary rows 136, which increase the basis weight and elastic tension in localized regions of layer 108 by extruding secondary filaments 116 onto layer 106; c) directly from row 130, which is configured to produce zones of a different polymer construction and high and low elastic tension, similar to those of the Figures 12-14, or d) through the combined effect of row 130 to produce a uniform or non-uniform precursor fabric 106, and secondary rows 136 that add filaments of different polymer construction and higher elastic tension in localized regions of layer 108. , by extruding secondary filaments 116 onto the layer 106. In any case, the non-woven layer 108 (including the filaments 112 and 116) can be stretched incidentally and up to a limit, kept aligned as the forming conveyor 140 is moved in a direction of machine to the right, at a speed that is slightly higher than the output speed of the filaments that leave the matrix.

To make the objective elastic laminate 105, the elastic non-woven layer 108 having zones of greater and lesser elastic tension is reinforced with one or more elastomeric melt blown layers made of the same or different elastic polymer material. With reference to Figure 29, meltblown extruders 146 and 148 are used to form meltblown layers 150 and 152 on one side of layer 108, which results in objective elastic laminate 105. The layer or layers blown by melt can act as layers of confrontation structural in the laminate and / or can act as adhesive layers when it is desired to add more layers to the laminate.

Several patents describe the various spray devices and methods that can be used by supplying the meltblown (adhesive) layers to the outer layers or when desired to the elastic threads themselves. For example, the following United States of America patents assigned to Illinois Tool Works, Inc. ("ITW") are directed to the various means for spraying or blowing by heat-melt adhesive melt into fibers on a substrate: 5,882,573; 5,902,540; 5,904,298. These patents are incorporated herein by reference in their entirety. The types of adhesive spray equipment set forth in the aforementioned patents are generally efficient for applying the adhesive on the nonwoven outer layers in the vertical filament lamination process of this invention. In particular, the ITW brand Dynatec spray equipment, which has the ability to apply approximately 3 gsm of adhesive at a running speed of about 1100 fpm, can be used for the melted spray adhesive applications contemplated by the processes of the present invention .

Representative adhesive patterns are illustrated in Figures 31 through 37. Applying an adhesive in a cross-machine pattern such as those shown in Figures 36 and 37 may result in certain advantages. For example, because the elastic threads are placed in the machine direction, having a pattern of adhesive oriented to a higher degree in the machine's transverse direction provides multiple adhesives in the elastic crossings per unit length.

In addition, in the particular embodiments of the present invention, the adhesive component is applied to the surface of the non-woven layer in separate adhesive lines. The adhesive can be applied with different patterns so that the lines of adhesive cross with the lines of elastic filaments to form various kinds of bonding networks, which will include the bonds of adhesive to elastic or adhesive to elastic bonds, adhesive to facing layer , and adhesive to adhesive bonds. These bonding networks can include a relatively large total number of adhesive-to-elastic and adhesive-to-adhesive bonds, which provide the laminated article with increased strength, while using minimal amounts of adhesive. These improvements are achieved through the use of a adhesive sprayed onto the surface of a nonwoven in a specific and predetermined pattern. In most cases, the final product with less adhesive exhibits a reduction with an inconvenient rigidity and is generally more flexible and softer than products that have more adhesive.

It has been found particularly advantageous to apply the adhesive in a pattern so that the adhesive lines are perpendicular or almost perpendicular to the elastic components. A 90 ° joint angle may not be possible in practice, but a medium or average joint angle that is greater than 50 ° or 60 ° will generally produce an appropriate bond between the elastic strands and the confronted material. A conceptual illustration of these types of joining angles is shown in Figures 38 and 39. The elastic-adhesive bonds are formed where the adhesive lines 448 and the elastic strands 430 join or intersect.

The filaments of continuous adhesive to the intersections of elastic strands are also controlled at a predetermined number of intersections per unit length of elastic strand. By having such lines of adhesive in a perpendicular orientation and by optimizing the number of joints per unit length of elastic strands, the final elastic strand element can be produced with a minimum amount of adhesive and the elastomeric strand material to provide desirable characteristics in the product to a low cost When the elastic-adhesive bonds are few in number or weak, then the elastic tension properties of the element may be compromised and the tension applied to the elastic strands may break the adhesive joints. In some known processes, the common solution for this condition is to increase the number of bonding sites, either by increasing the air pressure of the molten spray or by decreasing the rolling speed. As the pressure of the molten spray increases, the size of the adhesive fiber is reduced, which creates weaker bonds. By increasing the amount of adhesive used per unit area to create larger adhesive filaments can strengthen the weak bonds, which usually increases the cost of the laminate. By decreasing the speed of rolling, the productivity of the machine is reduced, which is reflected in a negative way in the cost of the product. The present invention, in part, uses a binding pattern effective, wherein a number of binding sites per elastic strand length is prescribed and wherein the strand to elastic adhesive links generally have a perpendicular orientation in order to provide maximum adhesive strength. This allows the element to be manufactured at a minimum cost by optimizing the adhesive and the elastomer content to match the needs of the product.

As used herein, the term "weft" generally refers to a nonwoven fabric or fabric of material that may be elastic or non-elastic, and which has a strand component oriented in the machine direction ("MD") , along with a flow path of the product during manufacture and a strand component in the cross machine direction ("CD") across the width of the fabric.

Figure 31 shows an exemplary weft pattern useful in the present invention, wherein the adhesive is applied to the elastic filaments with attenuation in the lines of adhesive in the transverse direction to the machine. The pattern 435 frame includes lines 436 of adhesive and elastic filaments 430. Figure 32 illustrates another pattern 438 exemplary pattern having adhesive lines 439 applied to the elastic 430 threads. In this embodiment, it can be seen that the joint angle is very high, close to 90 ° at the intersection between the adhesive and the elastic filaments. Figure 33 illustrates another pattern 441 pattern having adhesive lines 442 and continuous elastic strands 430.

As described above, Figure 38 illustrates a relatively high joint angle, which can be employed in products manufactured in accordance with the present invention. In particular, the descending angle 444 is shown as the angle formed by a line 448 of adhesive and the elastic thread 430. Adhesive / elastic angle 446 and adhesive / elastic angle 445 are shown as less than 90 °.

Figure 39 uses an example joint pattern to illustrate in a conceptual way the measure to determine the number of joints per unit length in the elastic strands or filaments. Figure 34 shows another exemplary bonding pattern having an adhesive-to-adhesive bond, wherein a swirl-type configuration is employed. Figure 35 illustrates a more random pattern, in where a large percentage of adhesive lines is in a perpendicular or almost perpendicular orientation to the elastic filaments. Figure 36 is another exemplary embodiment of a bonding pattern that does not have adhesive-to-adhesive bonds, but rather has elastic-adhesive bonding. Figure 37 illustrates another exemplary bonding pattern having both adhesive-to-adhesive bonds and elastic-to-elastic bonding bonds. The configuration shown in Figure 37 is similar to the design of a simple wiring.

Then, with reference again to Figure 29 for example, when it is desired to convert the objective elastic laminate 105 into a bonded-stretched laminate, the objective elastic laminate 105 can be stretched in a stretch stage 154 by pulling it between two rollers 156 and 158 of rolling, which rotate at a higher surface velocity than the conveyor 140. At the same time, the confronted layers 160 and 162 can be unwound from the supply rolls 164 and 166, and laminated to the objective elastic laminate 105 at Use a stretch roller unit. To achieve this purpose, rolling rolls 156 and 158 can be smooth or pattern calendered rollers that use the pressure to join the materials 160, 105, 162 together, as well as for stretching the objective elastic laminate 105. Alternatively, heat and pressure can be applied to join the materials 160, 105, 162 together. The resulting bonded-stretched laminate 170 can then be relaxed and / or retracted by using the roll rolls 172 and 164 to rotate at a lower surface speed than the calendered rolls 158 and can be wound onto the storage roll 176. The facing layers 160 and 162 may be of any facing material described above, and preferably are meltblown with polyolefin base.

Figure 30 illustrates a hybrid of the CF process SBL and the process VF SBL for manufacturing the elastic laminate of objective 170 attached-stretched. A first extruder apparatus 130 is fed with a polymer or elastic polymer blend from one or several sources (not shown). Extrusion apparatus 130 can be any device described with respect to Figure 29. Preferably, apparatus 130 is a meltblown swath that operates without a hot gas stream (e.g., air) that flows past the die tip in conventional meltblowing processes. The apparatus 130 extrudes low voltage filaments 112 directly on the conveyor system, which can be a wire forming system 140 (i.e., a forming band) that rotates clockwise around the rollers 142. The filaments 112 can be cooled by using a vacuum suction applied through the wire forming system and / or by means of cooling fans (not shown). The vacuum can also help hold the filaments against the wire forming system.

A meltblown extruder 146 is used to add an elastic meltblown layer 150 to the elastic filaments 112. Preferably, the meltblown layer 150 is made of the same elastic polymer as the low tension filaments 112. The resulting laminate 170 travels forward on the conveyor.

To make the region of higher tension, the vertical filament matrix 30 extrudes elastic filaments 116 of higher tension (ie, higher basis weight or different polymer composition) in a band that is narrower than the laminate 107 containing the filaments 112 The filaments 116 pass around a cooling roller 45, or a series of cooling rollers, and a series of stretching rollers, for example, three stretching rollers 55, 56 and 57 before joining with the laminate 107 between the rolling rolls 156 and 158, which are preferably smooth or pattern calendered rolls. Simultaneously, the facing layers 160 and 162 are unwound from the supply rolls 164 and 166 and are bonded to the laminate between the rolling rolls 156 and 158 to make the objective elastic laminate 170. According to the objective elastic laminate 170 it relaxes, it can be assumed as in the stacked configuration shown, due to the retraction of the high voltage filaments 116, present in part of the laminate. The objective elastic laminate 170 can be flattened between the rollers 174 and 176 and wound around the roller 176.

Elastic lens laminates made in accordance with the above described embodiments of this invention can be used in a wide variety of personal care absorbent garments, including diapers, training pants, swimsuits, absorbent underwear , adult incontinence products, feminine hygiene products, wet baby cleansers, and other medical and personal care garments and their like. Laminated materials Lens elastics are especially useful for absorbent articles that require elastic at the waist and / or regions of the user's legs. Elastic laminate lens materials can also be used on garments that require different levels of tension within the elastic region. For ease of explanation, the following description is in terms of a training shoe for baby having the objective elastic material used for containment flaps and waist cover.

With reference to Figure 40, a disposable absorbent garment 20, such as a baby training pant includes an absorbent body 32 and a fastening system 88. The absorbent body 32 defines a front waist region 22, a rear waist region 24, a crotch region 26 that interconnects with the front and rear waist regions, an inner surface 28 that is configured to come in contact with the waist region. user, and an external surface 30 opposite the inner surface, which is configured to come into contact with the user's clothing. With further reference to Figures 41 and 42, the absorbent body 32 also defines a pair of opposite side edges 36 and a pair of edges of the same. waist longitudinally opposed, which are designated as waist front edge 38 and waist rear edge 38. The front waist region 22 is contiguous with the waist front edge 38 and the rear waist region 24 is contiguous with the waist rear edge 39. The body 32 defines a waist opening 50 and two opposite leg openings 52.

The illustrated absorbent body 32 comprises a rectangular absorbent composite structure 33, a pair of transversely opposite front side panels 34 and a pair of transverse opposite side rear panels 134. The composite structure 33 and the side panels 34 and 134 can be integrally formed or comprise two or more separate elements, as shown in Figure 40. The illustrated composite structure 33 comprises an outer cover 40, a body side covering 42 (FIG. Figures 40 and 42) which are connected to the outer cover in an overlying relationship, an absorbent unit 44 (Figure 42), which is located between the outer cover and the body side covering, and a pair of containment fins 46 (Figure 42). The rectangular composite structure 33 has opposite linear end edges 45 which they form portions of the front and rear edges 38 and 39 of the waist, and opposite linear side edges 47, which form portions of the side edges 36 of the absorbent body 32 (Figures 41 and 42). As a reference, arrows 48 and 49 illustrate the orientation of the longitudinal axis and the transverse axis, respectively, of the trainer diaper 20 in Figures 41 and 42.

The front waist region 22 of the absorbent body 32 includes opposite front side panels 34 in transverse form and a front central panel 35 (Figures 41 and 42) placed and interconnecting with the side panels. The waist rear region 24 of the absorbent body 32 includes transversely opposite rear side panels 134 and a rear center panel 135 (Figures 41 and 42) placed and interconnected with the side panels. The waist edges 38 and 39 of the body 32 absorbent are configured to surround the user's waist when used and to provide a waist opening 50 that defines the waist circumference dimension. The portions of the lateral edges 36 transversely opposite in the crotch region 26 generally define the leg openings 52.

In the embodiment shown in Figure 40, the rear and front side panels 34 and 134 are held together by a fastening system 88 to form the side panels 55 as a whole (with each side panel 55 as a whole including a front side panel 34). and the rear side panel 134). The clamping system 88 includes a plurality of clamping tabs 82, 83, 84 and 85, which may be known as hook and loop fastening members. It should be appreciated that any number of panel configurations can be used in the context of the present invention.

Each of the side panels 34 and 134 illustrated in Figures 41 and 42, defines a distal edge 68 that is spaced apart from the attachment line 66, a leg end edge 70 disposed toward the longitudinal center of the trainer diaper 20 and a waist end edge 72 disposed toward a longitudinal end of the training pants. The leg end edge 70 and the waist end edge 72 extend from the side edges 47 of the composite structure 33 to the distal edge 68. The leg end edges 70 of the side panels 34 and 134 form part of the side edges 36 of the absorbent body 32. In the rear 24 region of waist, the leg end edges 70 are preferably, although not necessarily angled relative to the transverse axis 49 to provide greater coverage toward the back of the diaper compared to the front of the diaper. The waist end edges 72 are desirably parallel to the transverse axis 49. The waist end edges 72 of the front side panels 34 form part of the waist front edge 38 of the absorbent body 32, and the waist end edges 72 of the rear side panels 134 form part of the rear waist edge 39 of the body absorbent.

With reference to Figures 40 to 42, according to the invention, the containment fins 46, desirably continuous to the body 32, each includes a resilient objective material, which includes a high voltage stretch zone 130 and / or low tension, with elastic near (and aligned with) the openings 52 of the legs, and a stretch zone 131 of high and / or low tension, narrow band type close (and aligned with) the edges 90 type board, not joined of the containment fins 46, whereby a joint is created at the joint-like edges 90 of the containment fins 46 (Figure 42). The containment fins 46 can be joined, spaced pieces (as shown in Figures 40 and 41) or can be an extension of the outer cover 40, as shown in Figure 42. The dotted lines in Figure 42 indicate the limits between the zone 130 of high and / or low tension stretching and the zone 131 of high and / or low voltage stretching, whose limits are not visible to the observer. The high and / or low tension stretch zone 130 and the high and / or low tension stretch zone 131 are preferably separated, as shown in Figure 42. From the observer's point of view, the elastic material of The objective that forms the containment fins 46 appears as an integrated, homogeneous material.

The high and / or low tension stretch zone 131 exhibits higher elastic tension and / or elongation than the high and / or low tension stretch zone 130 of the containment fins 46, without requiring the use of bonded and fabricated elastic materials. Separately. In addition, the desired spacing between the high and / or low tension stretch zone 131 and the high and / or low tension stretch zone 130 allows the zones 130 and 131 to be stretched independently from each other, so as not to restrict the elongation capacity of any of the zones 131 and 130.

To further improve the containment and / or absorption of body fluids, preferably the diaper 20 trainer includes a waist cover having a waistband front portion 54 and a waistband back portion 56 (Figure 42) of an area 133 of high and / or low tension stretch near (and aligned with) waist edges 38 and 39. The waist cover portions 54 and 56 can be spaced apart, they can be joined pieces or they can be extensions of the outer cover 40, as shown in Figure 42. From the observer's point of view, the elastic target material that forms the waist cover portions 54 and 56 appear as an integrated, homogeneous material.

The containment fins 46 and the waist cover portions 54 and 56 are made of the objective elastic material. The different embodiments of the objective elastic materials may include the elastic laminate materials shown in Figures 15 through 19.

The invention also encompasses various types of garments wherein an elastic zone of high and / or low tension stretch joint is present near one or more openings of the garment. Depending on the garment, the high and / or low tension stretch joint areas of a resilient objective material may surround a complete garment opening or only a portion of the leg opening. In addition to the diaper 20 trainer, other types of garments in which the present invention can be used include personal care garments such as diapers, absorbent underwear, incontinence products in adults, certain feminine hygiene articles, and swimsuits. Elastic areas of high and / or low tension stretch joints can be used in a similar way in medical garments, including medical gowns, caps, gloves, clothing, face masks, and their like where desired providing a seal near one or more openings of the garment without requiring a separate elastic band made and manufactured separately. In addition, the elastic zone of high and / or low tension stretch seal can be used around the neck openings, arm openings, wrist openings, waist openings, leg openings, ankle openings and any other opening that surrounds a part of the body in where resistance to fluid transfer is convenient. EXAMPLE 1 An elastic stretched bonded-stretched roll was produced by using the vertical filament bonded-stretch laminate method. The elastic bonded-stretched lens laminate included a web of continuous filaments laminated between two facing materials blown by polypropylene melt of 0.4 osy and bonded with a Findley H2525A adhesive in one of the confronted materials. The filaments of the low voltage zone were produced with KRATON G2760, available from Shell Chemical Co. of Houston, Texas with a filament density of 8 filaments per inch. The high voltage zone was created with the same KRATON G2760 with the same filament diameter as the low voltage zone, but with a 50% increase in the filament density of 12 filaments per inch. These filaments were extruded from the same matrix, tempered on two cooling rollers, stretched 4.25 times and laminated between two confronting materials. The high voltage zone had an average tension at 50% elongation of 1980 grams per inch. The low voltage zone had a Average tension at 50% elongation of 130 grams per inch.

EXAMPLE 2 An elastic-bonded stretched-laminate roll was produced by using the vertical filament-bonded laminate method. The elastic bonded-stretched objective laminate included a continuous filament fabric of two different polymers laminated between two facing materials blown by polypropylene melt of 0.4 osy and bonded with a Findley H2525AA adhesive in one of the confronted materials. The filaments of the low tension zone were produced with a low tension elastic polymer mixture available from Shell Chemical Co. From Houston, Texas, containing 85% by weight of four-block polymer elastomer KRATON () G1730 and 15% by weight of a polyethylene wax with a calculated basis weight of about 8 gsm of a first matrix. A first strip of 1 7/8 inch filaments (approximately 28 gsm) forming a high tension zone was produced from a high tension elastic polymer mixture available from Shell Chemical Co, with a content of 70% by weight of a four-block copolymer KRATON G1730 elastomer and 30% by weight of polyethylene wax, with one part by weight of SCC 19202 blue pigment available from Standridge Color Corp of South Carolina, was laid between other filaments of low tension, The higher tension filaments were stretched approximately 5.5x with a subsequent cooling roller and the low tension filaments were stretched approximately 6x with subsequent cooling roller. The zone of low voltage had a tension of approximately 300 grams per sample of 3 inches at 50% elongation. The high voltage zone had a tension of approximately 600 grams per 3 inch sample at 50% elongation. The variation in roll diameter of the finished roll was less than 5 mm across the width of the material for a roll of 53 inches in diameter.

EXAMPLE 3 An elastic-bonded stretched-laminate roll was produced by using the vertical filament-bonded laminate method. The elastic bonded-stretched lens laminate included a woven fabric continuous filaments of two different polymers laminated between two facing materials blown by polypropylene melting of 0.4 osy and joined with a Findley H2525AA adhesive in one of the confronted materials. The filaments of the low tension zone were produced as in example 2, with a calculated basis weight of approximately 8 gsm. A 1 7/8 inch filament strip forming the high voltage zone included a dry blend of 70% by weight of four-block polymer elastomer of KRATON G1730, 12% by weight of a polyethylene wax and 18% of Dow catalyzed metallocene polyethylene (density 0.89 grams / cc), blended at 80: 1, with a SCC 19202 pigment at an average basis weight of 19 gsm. The high-tension filaments were placed between the low-tension filaments in a 1 7/8 inch strip. The low tension filaments were stretched approximately 6x in a subsequent cooling roller and the high voltage filaments were stretched approximately 5.5x in a subsequent cooling roller. The low voltage zone had a tension of approximately 400 grams per sample of 3 inches at 50% elongation. The high voltage zone had a tension of approximately 700 grams per sample of 3 inches at 50% elongation. The variation in the diameter of the roller of the finished roller was less than 5 mm across the width of the material for a roll of 53 inches in diameter.

EXAMPLE 4 In a unit known as Vertical Filament Laminator (VFL) the strands of an elastomeric polymer made of 65.5% KRATO G1730, 12% of a low molecular weight polyethylene wax, NA 601 and 22.5% of a sensitive adhesive to the Pressure as Regalrez ™ from Hercules Inc. Of Wilmington, DE, were extruded on top of a cooling roller. The elastic strands were subsequently stretched successively through a series of rollers stacked in a vertical form, one on top of the other, under the cooling roller and inside a pair of rolling rolls, ie rollers that create a point of contraction. At the point of contraction, the confronted sheets and the sticky elastic strands meet, after which the strands are joined with the facing sheets, under pressure to form a united laminate but which can be stretched. Alternatively, the external hot melt adhesive can be sprayed on the facing sheets, before enter the point of contraction in order to join the non-sticky elastomer with the facing sheets.

In the VFL unit, a film of the same elastomer can be melted from a second extruder using a grooved film matrix at a width of 19.05 cm to about 10 mil thick adjacent the strands. Due to the proximity of the strands and the film they make contact with each other with the initial cooling roller. The width of the film, initially at 19.05 cm, narrows to 5.08 cm when it passes over the rollers, which run at a differential speed together with the strands. The film is also thinned to 2 mils thick in the final laminate harvested after passing through the shrinkage point. There is a difficulty in introducing the film and the strands on the same cooling roller at the same time.

A second measure was adopted for a successful development of the web-based film or the objective elastic laminate by melting the film on a separate cooling roller using the grooved film matrix. The film was guided to the point of shrinkage through one or more stretching rollers and laminated together with the strands between the confronted. In this construction, no attempt was made to separate the strands from the area where the film was present, the strand was laid just above the film. In other words, the laying of the thread did not have discontinuities. The stretching of the film and the strands from their extruders had to be identical to produce a laminate with a uniform collection. To achieve a differential collection of the target elastic areas, a differential stretch is recommended before joining. The initial width and space of the film matrix were adjusted to effect the width and thickness of the film in the final laminate. Alternatively, the formation distance (distance between the die and the cooling roller), the speed of the cooling roller and the exit of the polymer can also be adjusted to change the dimensions of the film. It was observed that during processing an increase in stretching of the elastomer to achieve a greater stretch to the stop (STS) of 230-260%, when compared with a control material of 80-190% STS, results in a delamination of the threads of the film. The use of excess adhesive in the elastomeric materials also results in the reduction of butt-stretching of the laminate. Therefore a 1 gsm of Findley 2096 adhesive was sprayed by melt on the confronted in addition to a gum present in the elastomer formulation, which resulted in excellent adhesion and provided 230% + elongation. Another observation during the production of the elastic laminate was that the temperature of the cooling roller had to be around 25 ° C to prevent the film from breaking. Of course, the different formulations of the laminate components may require different temperature controls.

EXAMPLE 5 In this example, the objective elastic materials were tested in terms of stress relaxation at a body temperature, a 3-cycle hysteresis test, and a strain elongation. In the stress relaxation test, the tested samples included elastic laminate made from a film that included 65.5% KRATON® G1730, 12% low molecular weight polyethylene wax, NA 601, and 22.5% sensitive adhesive. pressure like Regalrez ™ and filaments that included 80% KRATON G1730, 13% rubber, and 7% wax, with the filaments stretched on the film. The non-TE portions of the laminate are they based only on filaments made of 80% V1730, 13% rubber and 7% wax. The control sample used in the transmission relaxation test was a LYCRA spandex laminate, available from E.l. DuPont de Nemours, Co., in a non-TE type laminate construction. In the hysterisis test, the samples included a TE sample of film made of 65.5% KRATO G1730, 12% of a low molecular weight polyethylene wax, NA 601, and 22.5% of pressure sensitive adhesive such as Regalrez ™ together with filaments made of 85% KRATON® G1730, 15% of a wax and a filament based on non-TE sample made of 80% KRATO G1730, 13% rubber and 7% wax. The control sample was a side panel material used in the PULL-UPS® Disposable Training Underpants, based on KRATON® G2760 polymer. In the stress elongation test, the samples included a Te sample of film made of 65.5% KRATON® G1730, 12% of a low molecular weight polyethylene wax, NA 601, and 22.5% of a water sensitive adhesive. pressure as the Regalrez ™ m together with filament made of 85% KRATON® G1730 and 15% wax, a filament with non-TE sample base of 80% KRATON® G1730, 13% rubber and 7% wax and a filament control with base in a sample of KRATON® 2760, which is commercially available side panel material used in the PULL-UPS Disposable Training Shorts Relaxation of tension at body temperature The stress relaxation of the elastomer at body temperature is mainly used to measure the dimensional stability of the material. Tension relaxation is defined as the force required to sustain a given constant elongation over a period of time. Therefore, it is a transient response that resembles a personal care product in use. In this experiment, the pressure loss (tension relaxation) as a function of time is measured at body temperature. The rate of change of property as a function of time was obtained by calculating the slope of a load-to-load regression of load and time. In addition to the loss rate as a function of time, the percentage of load loss was calculated from the knowledge of the final and initial loads. The duration of the experiment was matched with the time the product remains in the body in real time. An elastic material perfect, like a metal spring, for example, it is expected that of an expensive value for both, the inclination and the loss of load.

In the characterization of stress relaxation, a laminate sample 3 inches wide was used for the test. The samples were tested in a Sintech mechanical test frame in an environmental chamber at 38 ° C. A 3-inch grip-grip distance was shifted to 4.5 inches at the end (50% elongation) at a transverse displacement speed of 20 inches per minute. The load loss as a function of time was acquired over a period of 12 hours using the Testworks data acquisition capability of the Sintech MTS test equipment.

Figure 43 shows the stress relaxation behavior of the TE and non-TE portions of the laminate. Table 1 below shows the rate of load decay and the load loss at the end of 12 hours of the TE and non-TE materials. Spandex included LYCRA () as a control.

TABLE 1 3 cycles Histérisis test The equilibrium hysteresis behavior of the polymers was obtained by varying the rectangular specimen from 160% at 0% elongation to 20 inches / minute at room temperature. The process was repeated 3 times. Most of the samples reached a balance of 2 to 3 in cycles of ascending and descending variation.

The three curves shown in Figure 44 are for a target high-tension objective elastic material, the control (Disposable Training Shorts) PULL-UPS with uniform tension) and the objective elastic laminates. The curves are also meant to illustrate the donation process to which the product is submitted at the moment in which the user uses the product. From the Figure it can be seen that each material loses some of its tension in the second and third load compared to the first load cycle. However, the voltage remains relatively constant for the three discharge cycles. The second and third load cycles have similar load voltage as a function of elongation. It can also be observed that in some cases some of the load lost when unloading is restored in the load cycles. The Figure illustrates that the tension of the control is between the non-objective and objective elastic materials.

Stress lengthening The stress elongation behavior of the laminates was obtained at room temperature using Sintech I / S test frames. Samples of rectangular laminate having 3-inch widths were fastened at a grip distance of 3 inches and approximately a transverse displacement of 20 inches / minute was pulled. The samples were stretched approximately 200 grams of load limit. The elongation was calculated of the knowledge of the change in the original length and length of the sample. The tension at 50% elongation was calculated from the acquired data.

Figure 45 shows the voltage elongation curves for the control laminate samples, not Te and TE. The TE portion was a 2-inch wide film made with 65-5% of KRATON® G1730, 12% of a low molecular weight polyethylene wax, NA 601, and 22.5% of a pressure sensitive adhesive such as Regalrez ™, on top of the 85% KRATON® G1730 threads and 15% wax less than 0.03 inches in diameter to 12 threads per inch. The number of strands per inch and the thickness of the TE film can change independently or in combination, to alter the load elongation characteristics of the elastic laminate. The 3-inch samples tested had a 2.5-inch-wide film and an elastic strand stretched over them. The additional 0.5 to 2 inches of material consisted of a non-TE portion. In other words, the TE samples tested had a width of 3 inches consisting of TE and non-TE portions. Te and not portions could be tested separately to define the specifications of the material. From the Figure 45 shows that the tension as a function of the elongation is lower (up to about 150%) for the non-Te portions and higher for the Te portions. The TE panel also provides an additional advantage. Having a higher tension as a function of elongation in the side panel material means that when the panel voltage decays as a function of time at body temperature, it will still be at a higher voltage than the non-TE material and control after a predetermined period of time. For example, TE material should be considered, which has 674 grams at 50% elongation. The examination in Table 1 shows that this material relaxes its tension by 50% at 12 hours of body temperature. This implies that after 12 hours, the material will have a load of 324 grams. Compare this value with the control, which is 415 grams at 50% elongation and relaxes at 50% after 12 hours. Fifty percent of 415 is 208 grams. In this way, the TE material is 116 grams higher than the control at the end of 12 hours which presents a better tension to the body and therefore a better adjustment to the body over time.

Even when embodiments of the invention have been described as currently preferred, they can carry out some modifications and improvements without departing from the spirit and scope of the invention. The scope of the invention is indicated in the appended claims, and all changes that fall within the meaning and range of equivalents are intended to be encompassed by them.

Claims

R E I V I N D I C A C I O N S

1. An objective elastic laminate material comprising: at least one low voltage zone, the low voltage zone includes a plurality of first elastomeric filaments, the low voltage zone has a first basis weight; at least one high voltage zone, the high voltage zone includes a plurality of second elastomeric filaments, the second high voltage zone has a second base weight greater than the first base weight; Y a covering layer joined to at least one first side of the low voltage zone and a first side of a high voltage zone.

2. The objective elastic laminate as claimed in clause 1 characterized in that the second basis weight is at least 10% greater than the first basis weight.

3. The objective elastic laminate as claimed in clause 1, characterized in that the second basis weight is at least 50% greater than the first basis weight.

4. The objective elastic laminate as claimed in clause 1 characterized in that the second basis weight is about 100% to about 800% greater than the first basis weight.

5. The objective elastic laminate as claimed in clause 1 characterized in that the second basis weight is about 125% to about 500% greater than the first basis weight.

6. The objective elastic laminate as claimed in clause 1 characterized in that the second basis weight is about 200% to about 400% greater than the first basis weight.

7. The objective elastic laminate as claimed in clause 1, characterized in that the first basis weight is around 2 grams / m2 around of 14 grams / m2 and the second basis weight is around 10 grams / m2 to around 32 grams / m2.

8. The objective elastic laminate as claimed in clause 1 characterized in that the first basis weight is from about 4 grams / m2 to about 12 grams / m2 and the second basis weight is from about 12 grams / m2 to about of 30 grams / m2.

9. The objective elastic laminate as claimed in clause 1 characterized in that the first filaments have a first average thickness and the second filaments have a second average thickness greater than the first average thickness.

10. The objective elastic laminate as claimed in clause 9, characterized in that each of the first average thickness and the second average thickness is about 0.010 inches to about 0.040 inches.

11. The objective elastic laminate as claimed in clause 9, characterized in that each of the first average thickness and the second thickness average is around 0.020 inches to about 0.032 inches.

12. The objective elastic laminate as claimed in clause 1 characterized in that the first filaments have a first frequency and the second filaments have a second frequency higher than the first frequency.

13. The objective elastic laminate as claimed in clause 12 characterized in that the first filaments have a first frequency and the second filaments have a second frequency of about 4 hpi to about 40 hpi.

14. The objective elastic laminate as claimed in clause 12 characterized in that the first filaments have a first frequency and the second filaments have a second frequency of about 12 hpi to about 30 hpi.

15. The objective elastic laminate as claimed in clause 1 characterized in that the Low voltage zone and high voltage zone are attached to the coating layer with an elastomeric adhesive.

16. The objective elastic laminate as claimed in clause 1, characterized in that the covering layer comprises a blow fabric with elastomeric fusion.

17. The objective elastic laminate as claimed in clause 1, characterized in that it comprises a second covering layer joined to a second side of the low voltage zone and a second side of the high voltage zone.

18. The objective elastic laminate as claimed in clause 1 characterized in that the first elastomeric filaments and the second elastomeric filaments comprise a polymer selected from the group consisting of styrene-isoprene-styrene block copolymers, styrene-block copolymers butadiene-styrene, styrene-ethylene / butylene-styrene block copolymers, styrene-ethylene-propylene-styrene-ethylene-propylene copolymers, styrene-ethylene-propylene-styrene block copolymers, polyurethanes, elastomeric polyamides, elastomeric polyesters, elastomeric polyolefin homopolymers and copolymers, atactic polypropylenes, ethylene vinyl acetate copolymers, metallocene catalyzed or single site polyolefins having a lower density of about 0.89 grams / cc, and combinations thereof.

19. The objective elastic laminate as claimed in clause 1 characterized in that the first elastomeric filaments and the second elastomeric filaments comprise essentially the same polymer composition.

20. The objective elastic laminate as claimed in clause 1, characterized in that the low voltage zone is laterally adjacent to the high voltage zone.

21. The objective elastic laminate as claimed in clause 1, characterized in that each of the first covering layer and the second covering layer comprises a material selected from a non-woven fabric, a woven fabric and a film.

22. The objective elastic laminate as claimed in clause 1, characterized in that each of the first covering layer and the second covering layer comprises a material joined with spinning.

23. The objective elastic laminate as claimed in clause 1, characterized in that the low voltage zone has a first voltage and the high voltage zone has a second voltage greater than the first voltage.

24. A garment comprising the objective elastic laminate material as claimed in clause 1.

25. A method for producing an objective elastic laminate material comprising the steps of: extruding a plurality of first elastomeric filaments from a plurality of spin holes in at least one first spinning plate region; Extrude a plurality of second filaments elastomeric from a plurality of spin holes in at least a second spinning plate region, the second filaments have a basis weight greater than a basis weight of the first filaments; cool the first and second filaments; Stretch the first and second filaments; forming a laminated material by adhering the first and second stretched filaments to a first coating material and a second opposing coating material; and relax the laminate

26. The method as claimed in clause 25 characterized in that the first and second filaments are stretched by about the same amount.

27. The method as claimed in clause 25 characterized in that the first filaments are stretched by an amount different from that of the second filaments.

28. The method as claimed in clause 25 characterized in that the first and second filaments are stretched by about 100% to about 800% of an initial length.

29. The method as claimed in clause 25 characterized in that the first and second filaments are essentially continuous.

30. The method as claimed in clause 25 characterized in that the first spinning plate region has the spinning holes with a first diameter and in the second spinning plate region has the spinning holes with a second larger diameter than the spinning diameter. first diameter.

31. The method as claimed in clause 25 characterized in that the first spinning plate region has a first spinning hole frequency and the second spinning plate region has a second spinning hole frequency greater than the first frequency.

32. The method as claimed in clause 25 characterized in that the cooling step is achieved by passing the first and second filaments on a series of cooling rollers.

33. The method as claimed in clause 25 characterized in that the cooling step is achieved by placing the first and second filaments on a perforated band and applying a vacuum across the band.

34. The method as claimed in clause 25 characterized in that the stretching step is achieved by passing the first and second filaments on a series of stretching rollers.

35. The method as claimed in clause 34 characterized in that the series of stretching rollers comprises a first stretching roller and a second stretching roller, the first stretching roller rotates at a first speed and the second drawing roller rotates at a second speed greater than the first speed.

36. The method as claimed in clause 25 characterized in that the low voltage zone comprises the first filaments having a first voltage and a high voltage zone comprising the second filaments having a second voltage greater than the first voltage.

37. The method as claimed in clause 25 characterized in that the second filaments form a zone of high tension that overlaps a part of a zone of low tension formed by the first filaments.

38. A method for producing an objective elastic laminate material comprising the steps of: extruding a plurality of first elastomeric filaments from the first spinning system having at least one first die, the first die having at least one spin plate region with a plurality of first spin holes; extruding a plurality of second elastomeric filaments from a second spinning system having at least one second matrix, the second matrix having at least one region of spin plate with a plurality of second spin holes, the second filaments have a basis weight greater than the basis weight of the first filaments; cool the first and second filaments; Stretch the first and second filaments; forming a laminated material by adhering the first and second filaments stretched to a first coating material and a second opposing coating material; Y relax the laminate

39. The method as claimed in clause 38 characterized in that the first filaments are cooled by placing the first filaments on a perforated band and applying a vacuum through the band and the second filaments are cooled by passing the second filaments to through a series of cooling rollers.

40. The method as claimed in clause 39 characterized in that the first filaments are stretched by the passage of the first filaments through a first series of stretching rollers and the second filaments are stretched by passing the second filaments through a second series of drawing rollers.

41. The method as claimed in clause 40 characterized in that the amount of stretching of the first and second filaments is independently controlled.

42. The method as claimed in clause 38, characterized in that the first filaments are cooled by passing the first filaments through a first series of cooling rollers and the second filaments are cooled by passing the second filaments through a second filament. second series of cooling rollers.

43. The method as claimed in clause 42 characterized in that the first filaments are stretched by passing the first filaments through of a series of cooling rollers and the second filaments are stretched by passing the second filaments through a second series of stretching rollers.

44. The method as claimed in clause 43 characterized in that the amount of stretching of the first and second filaments is independently controlled.

45. The method as claimed in clause 38 characterized in that the second filaments form a high voltage zone that overlaps at least a part of a low voltage zone formed by the first filaments.

46. The method as claimed in clause 38, characterized in that it comprises the step of aligning the first filaments and the second filaments during the stretching step.

47. The method as claimed in clause 38 characterized in that a barrier layer is placed between the first coating material and the second coating material before the laminate is bonded.

48. The method as claimed in clause 38 characterized in that the first and second filaments are stretched by about 50% to about 300% of an initial length.

49. A disposable garment comprising a resilient objective laminate material, the objective elastic laminate comprises: at least one zone of low tension, the zone of low tension has a plurality of first elastomeric filaments, the first filaments have a first basis weight, at least one high voltage zone, the high voltage zone has a plurality of second elastomeric filaments, the second filaments have a second basis weight greater than the first basis weight; a coating material bonded to at least a first side of the low voltage zone and a first side of the high voltage area.

50. The disposable garment as claimed in clause 49 characterized in that the first and second filaments comprise essentially continuous filaments.

51. The disposable garment as claimed in clause 49 characterized in that it comprises a diaper.

52. The disposable garment as claimed in clause 49 characterized in that it comprises underpants of learning.

53. The disposable garment as claimed in clause 49 characterized in that it comprises swimwear.

54. The disposable garment as claimed in clause 49 characterized in that it comprises absorbent underpants.

55. The disposable garment as it is claimed in clause 49 characterized in that it comprises a baby wiping cloth.

56. The disposable garment as claimed in clause 49 characterized in that it comprises a product for adult incontinence.

57. The disposable garment as claimed in clause 49, characterized in that it comprises a product for the hygiene of women.

58. The disposable garment as claimed in clause 49 characterized in that it comprises a protective garment.

59. An objective elastic laminate material comprising: at least one zone of low tension, the zone of low tension includes a plurality of first elastomeric filaments, the first filaments include a first elastomeric polymer; at least one high voltage zone, the high voltage zone includes a plurality of second elastomeric filaments, the second filaments include a second elastomeric polymer; Y a coating material attached to at least a first side of the low voltage zone and a first side of the high voltage zone.

60. The objective elastic material as claimed in clause 59 characterized in that the first elastomeric filaments and the second elastomeric filaments comprise a polymer selected from the group consisting of styrene-isoprene-styrene block copolymers, styrene-block copolymers butadiene-styrene, styrene-ethylene / butylene-styrene block copolymers, styrene-ethylene-propylene-styrene-ethylene-propylene copolymers, styrene-ethylene-propylene-styrene block copolymers, polyurethanes, elastomeric polyamides, elastomeric polyesters, elastomeric polyolefin homopolymers and copolymers, atactic polypropylenes, ethylene vinyl acetate copolymers, metallocene catalyzed or single site polyolefins having a lower density of about 0.89 grams / cc, and combinations thereof.

61. The objective elastic laminate material as claimed in clause 60 characterized in that the first filaments and the second filaments comprise the same base polymer in different percentage amounts.

62. The objective elastic laminate material as claimed in clause 60 characterized in that the first filaments comprise a first base polymer and the second filaments comprise a second base polymer different from the first base polymer.

63. The objective elastic laminate material as claimed in clause 61 characterized in that the second filaments comprise the base polymer and the processing aid.

64. The objective elastic laminate material as claimed in clause 61 characterized in that the first and second filaments comprise the base polymer and a processing aid in different percentage amounts.

65. The objective elastic laminate material as claimed in clause 63, characterized in that the processing aid comprises a polyethylene wax.

66. The objective elastic laminate material as claimed in clause 59, characterized in that the high voltage zone has an elastic tension at least 10% higher than the low tension zone.

67. The objective elastic laminate material as claimed in clause 59, characterized in that the high voltage zone has an elastic tension of at least 50% greater than the low voltage zone.

68. The objective elastic laminate material as claimed in clause 59 characterized in that the high voltage zone has an elastic tension of about 100% to about 800% greater than the low voltage zone.

69. The objective elastic laminate material as claimed in clause 59 characterized because the high voltage zone has an elastic tension of around 125% to around 500% higher than the low voltage zone.

70. The objective elastic laminate material as claimed in clause 59 characterized in that the high voltage zone has an elastic tension of about 200% to about 400% greater than the low voltage zone.

71. The objective elastic laminate material as claimed in clause 59, characterized in that the high voltage zone is formed by placing the second filaments between some of the first filaments.

72. The objective elastic laminate material as claimed in clause 59, characterized in that the high voltage zone is formed by placing the second filaments in a non-overlapping region separated from the first filaments.

73. The objective elastic laminate material as claimed in clause 59 characterized because the coating material comprises a material selected from a non-woven fabric, a woven fabric and a film.

74. The objective elastic laminate material as claimed in clause 59, characterized in that the coating material comprises a material joined with spinning.

75. The objective elastic laminate material as claimed in clause 59, characterized in that the covering material comprises a continuous meltblown filament composite fabric.

76. The objective elastic laminate material as claimed in clause 59, characterized in that it comprises a second covering material joined to a second side of a low voltage zone and a second side of the high voltage zone.

77. The objective elastic laminate material as claimed in clause 59, characterized in that the low voltage zone and the high voltage zone are joined to the coating material with an adhesive elastomeric

78. A rolled roll of an essentially uniform diameter comprising the material as claimed in clause 59.

79. A garment comprising the objective elastic laminate material as claimed in clause 59.

80. A method for producing an objective elastic laminate material comprising the steps of: extruding a plurality of first elastomeric filaments having the first elastomeric composition, of the first spinning system; extruding a plurality of second elastomeric filaments having a second elastomeric composition, from a second spinning system; cool the first and second filaments; Stretch the first and second filaments; forming a laminated material by adhering the first and second filaments stretched to a first coating material and to a second opposing coating material; Y relax the laminate

81. The method as claimed in clause 80 characterized in that the first spinning system comprises a first die having at least one spin plate region with a plurality of spin holes.

82. The method as claimed in clause 80 characterized in that the second spinning system comprises a second die having at least one spin plate region with a plurality of spin holes.

83. The method as claimed in clause 80 characterized in that the cooling step is achieved by passing the first and second filaments on a series of cooling rollers.

84. The method as claimed in clause 80, characterized in that the cooling step is achieved by placing the first and second filaments on a perforated strip and applying a vacuum across the strip.

85. The method as claimed in clause 80 characterized in that the stretching step is achieved by passing the first and second filaments on a series of stretching rollers.

86. The method as claimed in clause 85 characterized in that the series of stretching rollers comprises a first stretching roller and a second stretching roller, the first stretching roller rotates at a first speed and the second drawing roller rotates at a second speed greater than the first speed.

87. The method as claimed in clause 80 characterized in that the second spinning system further comprises a third matrix.

88. The method as claimed in clause 80 characterized in that the first filaments define a zone of lower tension and the second filaments define a zone of higher tension.

89. The method as claimed in clause 80 characterized in that the first and second filaments are essentially continuous.

90. The method as claimed in clause 80 characterized in that the first filaments comprise a first elastomer and the second filaments comprise a second elastomer different from the first elastomer.

91. The method as claimed in clause 80 characterized in that the first filaments comprise a first elastomer mixture and the second filaments comprise a second elastomer mixture different from the first elastomer mixture.

92. The method as claimed in clause 80 characterized in that the first filaments comprise a first elastomer and the second filaments they comprise a different percentage amount of first elastomer.

93. The method as claimed in clause 80 characterized in that the second filaments form a zone of high tension that overlaps at least a part of a zone of low tension formed by the first filaments.

94. The method as claimed in clause 80 characterized in that the first filaments are cooled by passing the first filaments through a first series of cooling rollers and the second filaments are cooled by passing the second filaments through a second filament. second series of cooling rollers.

95. The method as claimed in clause 94 characterized in that the first filaments are stretched by passing the first filaments through a first series of stretching rollers and the second filaments are stretched by passing the second filaments through a second filament. second series of stretching rollers.

96. The method as claimed in clause 95, characterized in that the amount of stretching of the first and second filaments is independently controlled.

97. The method as claimed in clause 80 characterized in that the first filaments are cooled by placing the first filaments on a perforated band and applying a vacuum across the band, and the second filaments are cooled by passing the second filaments through a second series of cooling rollers.

98. The method as claimed in clause 97, characterized in that the first filaments are stretched by passing the first filaments through a first series of stretching rollers and the second filaments are stretched by passing the second filaments through a second filament. second series of stretching rollers.

99. The method as claimed in clause 98 characterized in that the amount of stretch of the first and second filaments is controlled independently.

100. The method as claimed in clause 80 characterized in that the first and second filaments are stretched by about the same amount.

101. The method as claimed in clause 80 characterized in that the first filaments are stretched by an amount different from those of the second filaments.

102. The method as claimed in clause 80 characterized in that the first and second filaments are stretched by about 25% to about 800% of an initial length.

103. The method as claimed in clause 80 characterized in that the first and second filaments are stretched by about 50% to about 700% of an initial length.

104. The method as claimed in clause 80 characterized in that it comprises the passage of Align the first filaments and the second filaments during the stretch step.

105. The method as claimed in clause 80 characterized in that a barrier layer is placed between the first coating material and the second coating material before the laminate is bonded.

106. The method as claimed in clause 80 characterized in that the second spinning system comprises a plurality of individually controllable spinning plate regions.

107. The method as claimed in clause 80 characterized in that the second spinning system further comprises a third die having a spun plate region with a plurality of spin holes.

108. A disposable garment comprising a resilient objective material, the elastic resilient material comprises a resilient objective material, the elastic resilient material comprising: At least one low voltage zone, the low voltage zone has a plurality of first filaments made from a first elastomeric polymer composition at least one high voltage zone, the high voltage zone has a plurality of second filaments made of a second elastomeric polymer composition; a coating material attached to at least a first side of the low voltage zone and a first side of the high voltage zone.

109. A disposable garment as claimed in clause 108 characterized in that the first and second filaments comprise essentially continuous filaments.

110. The disposable garment as claimed in clause 108 characterized in that it comprises a diaper.

111. The disposable garment as claimed in clause 108 characterized in that it comprises underpants for learning.

112. The disposable garment as claimed in clause 108 characterized in that it comprises swimming clothing.

113. The disposable garment as claimed in clause 108 characterized in that it comprises absorbent underpants.

114. The disposable garment as claimed in clause 108, characterized in that it comprises a cleaning cloth for a baby.

115. The disposable garment as claimed in clause 108 characterized in that it comprises a product for adult incontinence.

116. The disposable garment as claimed in clause 108 characterized in that it comprises a product for the hygiene of women.

117. The disposable garment as claimed in clause 108 characterized in that it comprises a protective garment.

118. An elastomeric laminate comprising: to. an elastomeric film having a first major surface and a second major surface; b. a thread of an elastomeric material secured to the first main surface of the elastomeric film.

119. The elastomeric laminate as claimed in clause 118 characterized in that the elastomeric yarn material comprises a thermoplastic polymer.

120. The elastomeric laminate as claimed in clause 118 characterized in that the elastomeric film material comprises a thermoplastic polymer.

121. The elastomeric laminate as claimed in clause 118 characterized in that the Elastomeric yarn material comprises a thermoset polymer.

122. The elastomeric laminate as claimed in clause 118 characterized in that the elastomeric film material comprises a thermoset polymer.

123. The elastomeric laminate as claimed in clause 118 characterized in that the elastomeric composition of the yarn material is the same as the elastomeric composition of the film material.

124. The elastomeric laminate as claimed in clause 118 characterized in that the elastomeric composition of the yarn material is different from the elastomeric composition of the film material.

125. The elastomeric laminate as claimed in clause 118 further characterized in that it comprises a cover sheet bonded to the laminate.

126. The elastomeric laminate as claimed in clause 125 characterized in that both Main laminate surfaces are covered with cover sheets.

127. The elastomeric laminate as claimed in clause 125 characterized in that the cover sheet is a spunbonded sheet.

128. The elastomeric laminate as claimed in clause 125, characterized in that it also comprises a garment incorporating the elastomeric laminate and the covering sheet in the structure of the garment.

129. The elastomeric laminate as claimed in clause 128 characterized in that the garment is one selected from the group of garments for personal care, medical garments and industrial workwear garments.

130. The elastomeric laminate as claimed in clause 129, characterized in that the garment is one selected from the group of diapers, training briefs, swimwear, absorbent undergarments, adult incontinence products, women's hygiene products , medical gowns protective, surgical medical gowns, capes, gloves, covers, face masks, lab suits and sets.

131. The elastomeric laminate as claimed in clause 118, characterized in that it also comprises a garment incorporating the elastomeric laminate in the structure of the garment.

132. The elastomeric laminate as claimed in clause 118 characterized in that different parts of the elastomeric film exhibit different amounts of elastic tension.

133. The elastomeric laminate as claimed in clause 132 characterized in that it further comprises a plurality of elastomeric yarns on the elastomeric film surface wherein at least some of the elastomeric yarns exhibit different amounts of elastic tension.

134. The elastomeric laminate as claimed in clause 118 characterized in that there are multiple elastomeric yarns on the surface of elastomeric film.

135. The elastomeric laminate as claimed in clause 134 characterized in that at least some of the elastomeric yarns exhibit different amounts of elastic tension.

136. The elastomeric laminate as claimed in clause 134 characterized in that at least some of the elastomeric yarns have different thicknesses.

137. The elastomeric laminate as claimed in clause 134 characterized in that at least some of the elastomeric yarns have different compositions.

138. The elastomeric laminate as claimed in clause 134 characterized in that the elastomeric yarns are arranged at a periodic spacing.

139. The elastomeric laminate as claimed in clause 134 characterized in that the yarns Elastomerics are arranged in a non-periodic spacing.

140. The elastomeric laminate as claimed in clause 134 characterized in that the elastomeric yarns are arranged in groups.

141. The elastomeric laminate as claimed in clause 140, characterized in that at least some of the groups exhibit different amounts of elastic tension from one another.

142. The elastomeric laminate as claimed in clause 140 characterized in that the groups have different spacing between their elastomeric yarns.

143. The elastomeric laminate as claimed in clause 118 characterized in that it comprises a second elastomeric thread secured to the second main surface of the elastomeric film.

144. The elastomeric laminate as claimed in clause 118 characterized in that a The second elastomeric film makes contact with the elastomeric yarn thereby placing the elastomeric yarn between the elastomeric film and the second elastomeric film.

145. An elastomeric laminate comprising: to. an elastomeric film having a first major surface and a second major surface; b. a plurality of threads of an elastomeric polymer material secured to the first major surface of the elastomeric film; Y c. a face sheet attached to at least one of the elastomeric film or the elastomeric yarns.

146. A process for making an elastomeric laminate comprising: to. produce an elastomeric film; b. produce the elastomers; c. Secure the elastomeric threads to the elastomeric film

147. The process for making an elastomeric laminate as claimed in clause 146, characterized in that it comprises: the step of producing the elastomeric film including placing the extruded elastomeric material from a slotted film matrix on a cooling roll; and stretching the elastomeric film from the cooling roller to a pressure point formed between the two pressure point rollers.

148. The process for making an elastomeric laminate as claimed in clause 147, characterized in that it also comprises adding a glutinizer to a formula of the film.

149. The process for making an elastomeric laminate as claimed in clause 147 further characterized in that it comprises the step of producing the elastomeric yarns including placing the extruded elastomeric material from a filament matrix on a cooling roller; Y Stretching the elastomeric wires from a cooling roller to the pressure point formed between two pressure point rollers.

150. The process for making an elastomeric laminate as claimed in clause 149, characterized in that it further comprises securing the elastomeric film and the elastomeric yarns together at the pressure point.

151. A garment having an elastomeric laminate and which is made by the process as claimed in clause 150.

152. The process for making an elastomeric laminate as claimed in clause 146, characterized in that it further comprises the step of producing elastomeric yarns including placing the extruded elastomeric material from a filament matrix on a cooling roller; Y Stretching the elastomeric wires from a cooling roller to a pressure point formed between the two pressure point rollers.

153. The process for making an elastomeric laminate as claimed in clause 152, characterized in that it also comprises: adding a glutinizer to a formula of the threads.

154. The process for making an elastomeric laminate as claimed in clause 152 further characterized in that it includes vertically stretching the elastomeric yarns.

155. A garment having an elastomeric laminate characterized therein because it is made by the process as claimed in clause 152.

156. The process for making an elastomeric laminate as claimed in clause 146, characterized in that it also comprises spraying at least one of the film and the threads with an adhesive before securing the film and the threads together.

157. The process for making an elastomeric laminate as claimed in clause 146 characterized in that the film is extruded on a first cooling roller and the wires are extruded on a second cooling roller.

158. The process for making an elastomeric laminate as claimed in clause 146, characterized in that it also includes the step of maintaining the laminate under tension with a pair of opposed tensioning rollers after it passes through the pressure point.

159. The process for making an elastomeric laminate as claimed in clause 158, characterized in that it includes relaxing the laminate after passing through the opposite tensioning rollers.

160. A garment that has an elastomeric laminate and which is made by the process as claimed in clause 158.

161. The process for making an elastomeric laminate as claimed in clause 146 characterized in that it includes the step of adhering a sheet of coating on one side of the laminate.

162. The process for making an elastomeric laminate as claimed in clause 161 further characterized in that it includes the step of adhering the cover sheets on both sides of the laminate.

163. The process for making an elastomeric laminate as claimed in clause 161, characterized in that it also includes the step of adhering the covering sheet to the laminate at the pressure point.

164. The process for making an elastomeric laminate as claimed in clause 146 characterized in that at least one of the elastomeric film and the elastomeric yarns is a thermosetting polymer that is cross-linked before securing the elastomeric yarns to the film elastomeric

165. The process for making an elastomeric laminate as claimed in clause 146 characterized in that at least one of the elastomeric film and the elastomeric yarns can be cross-linked after securing the yarns elastomeric to the elastomeric film.

166. A garment that has an elastomeric laminate and which is made by the process as claimed in clause 146.

167. A process for making an elastomeric laminate comprising: to. extruding an elastomeric film on a first cooling roller; b. extruding the elastomeric yarns on a second cooling roller; c. feeding the elastomeric film and the elastomeric yarns from the first and second cooling rollers to a pressure point and securing the elastomeric yarns to the elastomeric film; d. adhering a coating sheet to at least one of the elastomeric film and the elastomeric yarns at the roller pressure point. SUMMARY An elastic laminate lens material having different tension zones across a width of a roll of material and methods for making the same. In one embodiment, the objective elastic laminate material has at least one zone of low tension with the first filaments having a first basis weight and at least one zone of high tension having the second filaments with a second basis weight greater than the first base weight. The second basis weight is greater due to the increased average thickness of the second filaments and / or the increased frequency of the second filaments with respect to the first filaments. In another embodiment, at least two polymers or polymer blends having different settling properties are used to produce zones of variable tension through the material. In yet another embodiment, the objective elastic laminate material includes an elastic film with elastic yarns placed thereon. The objective elastic laminate material has the elastic properties that provide improved notch characteristics to the disposable personal care products.