Extendable first aid supplies

Abstract

To provide an adhesive plaster.SOLUTION: An adhesive plaster includes a treatment article having a material layer. The material layer includes a laminate having a non-woven fabric layer including polyester fiber and a non-adhesive high density polyethylene net. The material layer includes a plurality of non-material areas, and the non-material areas are formed like curved S-shaped pattern units. In the curved S-shaped pattern units, the material layer is larger than the same material layer with no non-material areas at least by 1125% when measured by an elasticity test xy described herein in a case where force from 1.96 N(0.2 kgf) is applied along at least one of 45° diagonal directions of the material layer. The S-shaped pattern units are disposed in a regular arrangement with dimensions and orientation so as to expand in the 45° diagonal directions.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a care product such as a bandage or tape having improved stretchability and conformity to human skin and joints.

Background Art

[0002] Care products such as bandages and tapes for applying to and / or covering the skin have been known for some time. Such care products are widely accepted for sealing small wounds, protecting small wounds, and / or covering abrasions. In some cases, microporous or breathable bandages or tapes have been developed and either one has been used to cover small wounds (including wounds that are partially healed).

[0003] Such care products have been significantly improved over the years, for example, by incorporating microporous materials, which allow the wound to breathe and water vapor to escape from the wound, thus reducing the chance of the wound becoming macerated. However, the care product covers the dimensional contour of the skin or tissue, adapts thereto, and moves with (i.e., adapts to the movement of) a portion of the skin or tissue covered by or in contact with the care product. In particular, there is still a need for a care product that provides improved stretchability and elasticity in situations where the care product covers or is in contact with areas of human tissue associated with joint regions such as fingers, ankles, elbows or knees. Therefore, in order for the care product to provide the above-described properties, the care product also needs to be able to dynamically conform to and respond to changes in the three-dimensional contour of the skin or tissue surface to which the care product is applied.

[0004] The care product also needs to be conformable to or provide sufficient drapability to the area of human skin tissue that it contacts or to which it is affixed.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Accordingly, an aspect of the present invention is to provide a first-aid product that can be used to cover a wound, protect a wound, and promote wound healing. A further aspect of the present invention is to provide a bandage and tape that conforms to the wound area of ​​the skin and has improved stretchability, elasticity, and conformability for a better coverage area of ​​a movable area such as a joint. Other aspects of the present invention will be readily apparent from the following description and claims. [Means for solving the problem]

[0006] In one embodiment, the present invention relates to a first-aid product comprising a material layer, the layer comprising a plurality of material-free regions, the material-free regions being in the form of S-shaped pattern units, the S-shaped patterns being subjected to the stretchability test described herein when a force of about 0.1 kgf is applied along at least one of the 45° diagonal directions of the material layer. xy When measured by [method], the material layer is sized, oriented, and arranged such that it extends at least approximately 425% more in the 45° diagonal direction than the same material layer without a material-free region.

[0007] The present invention also relates to methods of using / applying the medical supplies of the present invention, including the embodiments disclosed, to skin surfaces covering joint areas (or areas of easy movement) of the body of a human or mammal. [Brief explanation of the drawing]

[0008] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, for illustrative purposes only. [Figure 1] This is a perspective view of the present invention's first aid device having x, y, and z axes. [Figure 2] This is a plan view of the figure in Figure 1. [Figure 2A] Figure 2 is an enlarged plan view of a specific row of the pattern unit. [Figure 3] This is a cross-sectional view of Figure 2 taken along line 3-3. [Figure 4A]This figure shows the individual material-free regions at the closed position before the application of force F. [Figure 4B] This figure shows individual material-free regions in the open position while a force F is applied. [Figure 4C] This figure shows individual material-free regions returned to the closed position after the application of force F has ended. [Figure 5A] This figure shows differently formed (or non-curved) S-shaped patterns suitable for use in the first-aid supplies of the present invention, where pattern units in one row are arranged in alignment with pattern units in adjacent rows. [Figure 5B] This figure shows the pattern in Figure 5A, where the pattern units of one column are offset relative to the pattern units of an adjacent column. [Figure 5C] This figure shows the S-shaped pattern units of Figures 2 and 2A, where pattern units in one column are arranged in alignment with pattern units in adjacent columns. [Figure 6] This is an exploded view of the first-aid product of the present invention, showing an additional layer between the material layer and the removable layer of the present invention. [Figure 7] This is an exploded view of the first-aid product of the present invention, showing the material layers of the present invention between the backing layer and the removable layer. [Figure 8] This figure shows the tensile force of the material layer in the longitudinal, transverse, and 45° diagonal directions (L, T, and D45). [Figure 9] This figure shows a previously disclosed slit unit pattern for use in comparison. [Modes for carrying out the invention]

[0009] The first-aid supplies of the present invention include, consist of, or essentially consist of any of the essential elements and limitations of the present invention described herein, as well as any additional or optional features, components, or limitations described herein.

[0010] As used herein, the term “comprising” (and its grammatical variations) is used in a sense that encompasses “having” or “including” (and is interchangeable with these terms), and not in the exclusive sense of “consisting only of.” As used herein, the terms “a” and “the” are understood to encompass both singular and plural nouns.

[0011] As used herein, the terms “skin” and “tissue” are interchangeable and refer to the skin of mammals.

[0012] As used herein, the terms “visual inspection” or “visually inspected” mean an inspection by the naked eye (excluding standard corrective lenses fitted to correct nearsightedness, farsightedness, or astigmatism, or other corrective lenses) under lighting at least equivalent to that of a standard 75-watt incandescent light bulb at a distance of approximately 0.25 meters.

[0013] Any documents incorporated herein by reference, in whole or in part, are incorporated herein only to the extent that they do not conflict with this Specified.

[0014] In certain embodiments, the present invention disclosed herein can be carried out without any components, elements (or groups of components or elements) or method steps not specifically disclosed herein.

[0015] material layer In certain embodiments, the first-aid product 10 may take the form of a wound first-aid product. In certain embodiments, the first-aid product 10 may take the form of a bandage or tape. Referring to the drawings, Figure 1 shows an exemplary embodiment of the improved first-aid product 10 of the present invention. In certain embodiments, the first-aid product 10 comprises a material layer 11 formed from a non-swellable material of woven or nonwoven fabric. In one embodiment, the material layer 11 is formed from a non-swellable nonwoven fabric material. As used herein, the term “non-swellable” means that it cannot absorb fluids, or is substantially unable to absorb fluids, and therefore, when the material layer is in contact with fluids present in the environment of use, i.e., wound exudate or secretions, or body sweat, the volume of the material layer does not increase much or at all. In one embodiment, the volume increase of the material layer is, based on the dry weight of the material layer, about 5% by weight or less, optionally about 2.5% by weight or less, optionally or optionally 1% by weight or less as an aqueous saline solution. These values ​​can be obtained using a saline absorption test, in which a sample of the dried weighing material layer is immersed in saline containing 0.9 wt% NaCl for 1 minute at 37°C for subsequent weighing.

[0016] Suitable non-swelling materials include, but are not limited to, polyurethane, polyethylene, polyisobutadiene, polyisobutylene, neoprene, polyamide, polyester, polyether polyester, nonhydrophilic polyether-polyamide, plasticized polyvinyl chloride, styrene-butadiene block copolymer, styrene-isoprene block copolymer, polyacrylate, methacrylic acid copolymer, polypropylene, rayon, rayon / polyester blends, and mixtures thereof.

[0017] In certain embodiments, the non-swelling material is polyurethane. Suitable polyurethanes include polyester and polyether polyurethane, examples of which are Estanes (a registered trademark of BFGoodrich Ltd). Suitable Estanes are of the grades designated as 5702, 5701, 5714F, and 580201.

[0018] In certain embodiments, the non-swelling material is polyester. Suitable polyesters include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and mixtures thereof. PET substrates are commercially available from Fibertex Nonwovens (Ingleside, Ill).

[0019] In certain embodiments, the material layer is free from, or substantially free from, swelling materials such as cross-linked polyvinyl alcohol, cross-linked polyvinylpyrrolidone, hydrophilic polyurethane, hydrophilic hydroxyalkyl esters of poly(meth)acrylic acid and their copolymers, hydrophilic polyether-polyamide polymers, cellulose acetate, cellulose acetate-propionate, and other hydrophilic, water-insoluble cellulose derivatives. As used herein, the term “substantially free” means a material layer containing up to 5% by weight (or about 5% by weight), optionally up to 2.5% by weight (or about 2.5% by weight), optionally up to 1.0% by weight (or about 1.0% by weight), or optionally up to 0.1% by weight (or about 0.1% by weight).

[0020] In certain embodiments, the material layer 11 is porous and allows both water vapor and air to pass through it easily. In certain embodiments, as can be seen from Figures 1 and 3, the top surface 12 and bottom surface 13 of the material layer 11 are smooth and flat (or substantially smooth and flat), and thus the top surface 12 and bottom surface 13 of the material layer 11 do not contain or substantially contain channels or raised portions on their surface.

[0021] In certain embodiments, the material layer 11 may include channels or raised portions, such as those produced by conventional embossing techniques. In certain such embodiments, the channels or raised portions do not coincide with patterns contoured by S-shaped pattern units, which are discussed in more detail below. Examples of channels or raised portions can be found in U.S. Patent Publication No. 2012 / 0220973 (Chan et al.) and No. 2012 / 0220974 (to Chan et al.), each of which is incorporated herein by reference in its entirety.

[0022] In certain embodiments, the material layer 11 has a thickness of approximately 0.2 mm to approximately 3 mm, and optionally approximately 0.77 mm to approximately 1.5 mm.

[0023] Material-free area The material layer 11 of the first-aid product 10 further incorporates one or more (or more) separate material-free regions 15 extending through the thickness of the material layer 11 (i.e., the distance from the top surface 12 to the bottom surface 13). As used herein, the terms “material-free” or “material-free” mean a range or region of the material layer that is material-free or substantially material-free, and thus the continuity of the material is interrupted, or such range or region is lacking or limited in material, but includes cuts, holes, slits, or openings in the material. Accordingly, the terms “cuts,” “holes,” “slits,” or “openings” in the material are interchangeable with each other and with the term “material-free region.” In certain embodiments, individual material-free regions 15 include individual regions that cannot be identified with the naked eye (i.e., cannot be seen without using an optical lens to enlarge the field of view), and examples of such regions include ultrathin slits formed in the material layer 11 by cutting the material layer 11 with a knife with a thickness of about 1 μm to about 25 μm, or with a laser having a laser thickness of about 10 μm to 1000 μm.

[0024] In certain embodiments, the individual unmaterialized regions 15 are distinct slits forming discrete, nonlinear, continuous pattern units, each pattern unit being spaced apart and not connected to other pattern units (for example, as shown in the figure, discrete S-shaped pattern units). In one embodiment, the slit pattern units can be arranged in rows that are staggered with the slit pattern units of the next row, or aligned with the slit pattern units of the next row. In an alternative embodiment, the slit pattern units of one row may be perpendicular to any adjacent slit pattern units of the next row. In certain embodiments, the individual unmaterialized regions 15 are S-shaped slits.

[0025] In a particular embodiment, the pattern units (or slit pattern units) 15 are formed on the material layer 11, and when all and completed pattern units are counted (i.e., when determining the pattern surface density, partial or incomplete patterns are not counted), there are 4 pattern units / in on the surface of the material layer 11. 2 ~14 pattern units / in 2 10 arbitrary pattern units / in 2 ~14 pattern units / in 2 or, optionally, 12 pattern units / in 2 The dimensions are such that they provide a pattern surface density (i.e., spatially arranged pattern units 15 per square inch of the surface of the material layer 11). The pattern surface density is 4 pattern units / inch as described below or above. 2 ~14 pattern units / in 2 By varying (or increasing or decreasing) the range outside of it, any increase in the extensibility of the material layer 11 provided by the incorporated pattern unit (or material-free region) 15 is reduced.

[0026] One embodiment of the individual material-free region 15 is shown in FIG. 2 and shows an individual material-free region 15 formed as a separate S-shaped slit pattern unit. As used herein, the term "S-shaped" generally means a pattern formed in the shape of an "S", such as the "block" or angled "S" shape exemplified by the pattern units in the column of FIG. 5A, such as a curve defined by S(t)=1 / 1+e -t and includes curved patterns, such as those having curved and non-curved patterns. In certain embodiments, one or more (or all) of the S-shaped pattern units of FIG. 2 are replaced with the non-curved pattern units of FIG. 5A, but still retain the same arrangement as the pattern units shown in FIG. 2.

[0027] In addition to lasers and knives, the material-free region can also be incorporated into the material layer 11 during the formation of the material layer 11, for example, by water jet cutting, high-pressure steam cutting, ultrasonic cutting, or punch cutting.

[0028] In certain embodiments, the S-shaped slit pattern units 15 are arranged adjacent to each other. In certain embodiments, the S-shaped slit pattern units 15 do not intersect and are spaced apart from each other. Optionally, additional S-shaped slit pattern units 15 are arranged to form one or more linear rows 14 of S-shaped slit pattern units 15. In certain embodiments, the S-shaped slit pattern unit 15 is further configured to form one or more straight rows 14 of S-shaped slit pattern units 15, so that, as illustrated in Figure 2A, the top t and bottom b of any S-shaped slit pattern unit 15 in a row 14 are spatially aligned with the respective top t and bottom b of other similarly oriented S-shaped slit pattern units 15 in that row (for example, the top t and bottom b of any S-shaped slit pattern unit 15 in a row 14 whose length l expands or contracts in one direction are spatially aligned with the top t and bottom b of any other S-shaped slit pattern unit 15 in that row whose length l expands or contracts in the same direction). As used herein, the term “straight” means following the direction of a straight line or a substantially straight line.

[0029] In any of the embodiments described above, when applied to the skin to cover or in contact with a wound and / or skin surface, the first-aid product 10 stretches or contracts with movement of the skin surface or surrounding area of ​​the covered or in-contact area to minimize detachment of the first-aid product 10 (i.e., loss of adhesion to the skin or wound) as a result of such movement. In such embodiments, any movement of the covered or in-contact skin surface causes a force F on the first-aid product 10 (i.e., F > 0). The S-shaped slit pattern unit 15 is arranged such that, after the application of a force F (in any direction) to the treatment device 10 (i.e., F>0), one or more unmaterialized regions are freely opened from their initial closed position (or configuration) to an open position, facilitating the expansion and contraction of the material layer 11 from a first position p1 to a second position p2 stretched or expanded in the direction of the force F. When the force F is no longer applied (i.e., F=0), the unmaterialized regions are freely closed (or returned) to their initial closed position (or configuration), facilitating the movement of the material layer 11 from the second position p2 back to the first position p1, as shown in Figures 4a, 4b, and 4c. Thus, as the applied force decreases or increases, the degree to which one or more unmaterialized regions are opened decreases or increases, respectively. It is further understood that the unmaterialized regions 15 open according to the direction of the force F. As used herein, the term “freely” means that the material used to form the material layer 11 does not swell to restrict or inhibit the opening or closing of the unmaterialized area 15, and / or, once the removable layer is removed, the material layer 11 restricts or inhibits the opening or closing of the unmaterialized area 15 without being attached to any additional layer or substrate. As used herein with respect to the unmaterialized area 15, the terms “closed,” “closed position,” or “closed configuration” mean that the unmaterialized area 15 is closed or substantially closed, and therefore, there is no or substantially no visibility through the unmaterialized area 15 during visual inspection. As used herein with respect to the unmaterialized area 15, the terms “open,” “open position,” or “open configuration” mean that the unmaterialized area 15 is open, and therefore, there is visibility through the unmaterialized area 15 during visual inspection.As used herein, the term “visibility” means the ability to see and identify the individual characteristics of a living or non-living object.

[0030] As shown in Figure 2a, in certain embodiments, the length l of each S-shaped slit pattern unit 15 can be greater than or equal to its width w. In certain embodiments, the length l of the S-shaped slit pattern unit 15 is about 1 to about 6 times the width w of the S-shaped slit pattern unit 15, and optionally 2.5 to about 4.7 times the width w. In certain embodiments, the length l of the S-shaped slit pattern unit 15 is 3 times the width w of the S-shaped slit pattern unit 15.

[0031] In certain embodiments, the length l of the S-shaped slit pattern unit 15 can be oriented to extend in the lateral direction A of the first aid item 10, or to extend in the longitudinal direction B of the first aid item 10. The lateral direction A is perpendicular to the longitudinal direction B. Alternatively, one or more S-shaped slit pattern units 15 can be arranged and oriented so that their lengths l extend in the longitudinal direction B of the first aid item 10, or one or more S-shaped slit pattern units 15 can be arranged or oriented so that one or more S-shaped slit pattern units 15 extend in the lateral direction A of the first aid item 10. Furthermore, one or more S-shaped slit pattern units 15 can be oriented so that their lengths l extend diagonally with respect to the lateral direction A and the longitudinal direction B. As used herein, the term “diagonal” refers to a direction (or direction line) that forms an angle other than a right angle when it intersects with either the lateral direction A or the longitudinal direction B. Diagonal direction D in Figure 8 45 This is an example of a diagonal direction relative to the horizontal direction A and the vertical direction B.

[0032] In another embodiment, the length l of the S-shaped slit pattern unit 15 is oriented such that the length l of the S-shaped slit pattern unit 15 is perpendicular to the length l of adjacent S-shaped slit pattern units 15. In one embodiment, as shown in Figures 1, 2, and 2A, the length l of the S-shaped slit pattern unit 15 is oriented such that the length l of each S-shaped slit pattern unit 15 in a row 14 is oriented perpendicular to its adjacent S-shaped slit pattern unit 15 in that row 14.

[0033] In certain embodiments, the rows of straight lines 14 of the S-shaped slit pattern unit 15 are arranged adjacent to and parallel to other rows of S-shaped slit pattern units 15. When the rows of straight lines of the S-shaped slit pattern unit 15 are arranged parallel to other rows of straight lines 14 of the S-shaped slit pattern unit 15, the stability of the material layer is reduced when a tensile force is applied. As can be seen from Figures 5A and 5C, in certain embodiments, the linear rows 14 of S-shaped slit pattern units 15 are arranged such that i) the S-shaped slit pattern units 15 of one such row 14 are aligned with the S-shaped slit pattern units 15 of adjacent parallel matrices 14 (so that the aligned S-shaped slit pattern units 15 of row 14 form an aligned row 16 of S-shaped slit pattern units 15), or, as shown in Figure 5C, ii) the S-shaped slit pattern units 15 of adjacent parallel matrices 14 are arranged in a staggered pattern (so that the S-shaped slit pattern units 15 of a given row 14 are offset from the S-shaped slit pattern units 15 of any adjacent parallel matrices 14).

[0034] In certain embodiments, the length l is in the range of 1 (or about 1) mm to 10 (or about 10) mm. In certain embodiments, the length l is in the range of 4 (or about 4) mm to 8 (or about 8) mm. In certain embodiments, the width w is in the range of 1 (or about 1) mm to 10 (or about 10) mm. In certain embodiments, the width w is in the range of 3 (or about 3) mm to 4 (or about 4) mm.

[0035] The S-shaped slit pattern unit 15 may be curved or non-curved. As used herein, the term “curved” means formed, bounded, or characterized by curved lines and not having angled edges or segments.

[0036] As further shown in Figure 2a, in a particular embodiment, each S-shaped slit pattern unit 15 in a row 14 of the S-shaped slit pattern unit 15 has a vertical centerline Vcl, thereby the vertical centerline Vcl of each S-shaped slit pattern unit 15 is vertically spaced apart from the vertical centerline Vcl of linearly adjacent S-shaped slit pattern unit 15 by a width w'. Also in a particular embodiment, each row 14 of the S-shaped slit pattern unit 15 has a horizontal centerline Hcl. In a particular embodiment, the horizontal centerline Hcl of each row 14 of the S-shaped slit pattern unit 15 is spaced apart from the horizontal centerline Hcl of the row 14 of the S-shaped slit pattern unit 15 by a distance d. The vertical centerline Vcl is perpendicular to the horizontal centerline Hcl.

[0037] The term "centerline" refers to a straight line that passes vertically or horizontally through the vertical or horizontal center of either an individual unit of the unmaterialized area 15 or a row 14 of individual units of the unmaterialized area 15, respectively.

[0038] In certain embodiments, distance d is equal to width w'. In certain embodiments, width w' is in the range of 2.5 (or about 2.5) mm to 10 (or about 10) mm. In certain embodiments, width w' is 6.5 (or about 6.5) mm. In certain embodiments, distance d is in the range of 2.5 (or about 2.5) mm to 10 (or about 10) mm. In certain embodiments, distance d is 6.5 (or about 6.5) mm.

[0039] In certain embodiments, the multiple S-shaped slit pattern units 15 and / or rows 14 cover approximately 50% to approximately 100%, optionally at least approximately 75% to approximately 100%, optionally approximately 90% to approximately 100%, or optionally 100% (or approximately 100%) of the surface area (both top and bottom planes) of the surface of the material layer 11, with a surface density (i.e., slit pattern units / in 2 ) is formed on the material layer 11. When used herein, "covering 100% of the surface area of ​​the material layer" or "100% surface area coverage of the material layer" means that multiple slit pattern units have a certain surface density (i.e., slit pattern units / in 2 This means that the multiple slit pattern units are arranged in such a way that they cover the entire surface area of ​​the material layer and extend to the peripheral edge of the material layer.

[0040] Without being limited by theory, the S-shaped slit pattern unit 15 described above is considered to provide improved extensibility and adaptability to the first aid device 10 by enabling expansion and contraction in the vertical, horizontal, and diagonal directions (i.e., not in the vertical [or horizontal] direction of the xy-plane, nor in the horizontal [or vertical] direction). In certain embodiments, the S-shaped slit pattern unit 15 enables expansion and contraction (or movement) in the z-axis direction. By utilizing this S-shaped slit pattern, the first aid device 10 requires significantly less force to stretch compared to the same first aid device without the S-shaped slit pattern unit 15.

[0041] Draping properties In certain embodiments, the material layer 11 comprising the materialless slit pattern unit of the present invention provides improved drape. In certain embodiments, the materialless slit pattern unit of the present invention is shown in Figure 8 in the longitudinal and 45° diagonal directions (B, D 45 , and D' 45As exemplified by ), the drape of a material without any slits is improved by at least 30% based on the bending length of the material layer tested in the longitudinal direction, and by at least 50% in at least one of the two 45° diagonal directions based on the bending length of the material layer tested in both 45° diagonal directions. The bending length and percentage drape are determined using the following drape tests.

[0042] Drapeability test (stiffness test) The stiffness testing machine used to perform the drape test consists of a platform with a smooth, low-friction, flat plastic surface and a graduated scale. A rectangular strip of fabric is supported on the horizontal platform of the stiffness testing machine and stretched in the direction of its length, thereby causing the stretched portion to overhang and bend under its own mass. The platform is supported by two side sections made of plastic. Index lines are engraved on these side sections and they are tilted at an angle of 41.5° to the underside of the plane of the platform surface. At this angle, the bending length is half the overhang length. A mirror is attached to the stiffness testing machine to allow the operator to view both index lines from a convenient position. The stiffness testing machine is equipped with a graduated scale for measuring the bending length, and the scale is graduated in centimeters. The test is performed at 24.5°C and 40% relative humidity.

[0043] Sample preparation: The test sample (i.e., with a material-free slit pattern unit) and the control sample (i.e., without slits) are shown in Figure 84 in the vertical, horizontal, and 45° diagonal directions (B, A, D). 45 , and D' 45As illustrated by ( ), cuts are made from the material layer (described below) along the longitudinal and transverse directions, and along two 45° diagonal directions. For the test sample, three 8"×1" samples are cut for each of the longitudinal, transverse, and two 45° diagonal directions. For the control sample, three 8"×1" samples are cut for each of the longitudinal, transverse, and two 45° diagonal directions. The samples are set in place for 24 hours at 50% relative humidity and 23°C.

[0044] i. The material layer used to prepare the sample is a two-layer substrate consisting of the following: A nonwoven fabric layer is produced from 100% PET fibers with a fiber length of approximately 38 mm by passing the fibers through a dry carding process to form blanket rolls, and then through a needle punching process. The nonwoven fabric has a weight of 3.7 oz / square yard. • A non-adhesive HDPE net is heat-laminated onto a nonwoven fabric substrate. This net has the following characteristics: - Thickness = 102-127 microns - Number of bosses: Vertical: 22-28 bosses / inch, Horizontal: 27-33 bosses / inch - Aperture (pore) size approximately 300 μm - Basis weight = 0.48~0.59 oz / square yard -Geometric shape = hexagon. Such HDPE nets are Delnet® AC530WHT nets and are available from Delnet Technologies (Del.).

[0045] The above two-layer material is available from Delstar Technologies, DEL under the name Stratex® 3.7NPET-E (which incorporates Delnet® AC530WHT netting).

[0046] procedure: a) Place the stiffness testing machine on a level surface and use a spirit level to confirm that it is level. b) One of the prepared test samples, cut from one of the material layer directions, is placed lengthwise and flat on the plane of the flat plastic surface of the longitudinal testing machine, with the leading edge of the sample coinciding with the edge of the flat plastic surface at the point of inclination. c) Carefully place the graduated scale on the test sample with the zero mark at the zero position. d) Observe the index lines on the side of the stiffness testing machine using the machine's mirror. e) Next, carefully slide the graduated scale until, when viewed in a mirror, the leading edge of the test sample bends downward away from the graduated scale and touches the two inclined index lines. f) If the leading edge of the test sample is twisted, align the center point of the leading edge with the plane. If the twist exceeds 45°, ignore the indicated value. g) Record the reading on the scaled scale. h) Position the opposite surface of the test sample upwards, and then repeat steps b) to g) twice more in the width direction, and once for each surface of the test sample in the width direction. i) For the test sample, determine and record the average of the four measured bending lengths. j) Repeat steps b) to i) for each of the remaining test samples obtained by cutting the material layer from the same direction. k) The average of the bending lengths of each of the three test samples in the same direction is averaged and recorded as the sample average of the samples in the same direction (hereinafter referred to as "bending length"). l) Repeat steps b) to k) for the test sample cut from the remaining direction. m) Repeat steps b) to l) in the same manner, but using a prepared control sample instead of the test sample. n) The percentage drape of the slit material layer along a given direction is calculated by dividing the bending length of the test sample cut in the given direction by the bending length of the control sample cut in the given direction.

[0047] Stretchability along at least one of the vertical and horizontal directions. In a particular embodiment, when a force of 0.1 (or about 0.1) kgf is applied along at least one of the longitudinal direction B or transverse direction A of the material layer 11, the stretchability test described herein is performed. xy When measured by [mean method], the material layer 11 having the S-shaped slit pattern unit 15 expands or contracts in at least one of the longitudinal direction B or transverse direction A by at least 100% (or about 100%), optionally at least 150% (or about 150%), optionally at least 200% (or about 200%), optionally at least 300% (or about 300%), optionally at least 400% (or about 400%), optionally at least 450% (or about 450%), or optionally at least 475% (or about 475%) more than the same material layer 11 without material areas.

[0048] In a particular embodiment, when a force of 0.2 (or about 0.2) kgf is applied along at least one of the longitudinal direction B or transverse direction A of the material layer 11, the stretchability test described herein is performed. xy When measured by [method], the material layer 11 having the S-shaped slit pattern unit 15 expands or contracts in at least one of the longitudinal direction B or transverse direction A by at least 150% (or about 150%), at least 200% (or about 200%), at least 250% (or about 250%), optionally at least 300% (or about 300%), optionally at least 350% (or about 350%), optionally at least 400% (or about 400%), optionally at least 500% (or about 500%), optionally at least 600% (or about 600%), optionally at least 700% (or about 700%), optionally at least 800% (or about 800%), optionally at least 825% (or about 825%), optionally at least 850% (or about 850%), or optionally at least 870% (or about 870%) more than the same material layer 11 without material areas.

[0049] In a particular embodiment, when a force of 0.3 (or about 0.3) kgf is applied along at least one of the longitudinal direction B or transverse direction A of the material layer 11, the stretchability test described herein is performed. xy When measured by [method], the material layer 11 having the S-shaped slit pattern unit 15 is at least 425% (or about 425%), optionally at least 450% (or about 450%), optionally at least 500% (or about 500%), optionally at least 550% (or about 550%), optionally at least 600% (or about 600%), optionally at least 650% (or about 650%), and optionally less than the same material layer 11 without material areas. It expands or contracts by at least 700% (or about 700%), arbitrarily at least 750% (or about 750%), arbitrarily at least 800% (or about 800%), arbitrarily at least 900% (or about 900%), arbitrarily at least 1000% (or about 1000%), arbitrarily at least 1025% (or about 1025%), or arbitrarily at least 1050% (or about 1050%) more in at least one of the vertical direction B or horizontal direction A.

[0050] In a particular embodiment, when a force of 0.4 (or about 0.4) kgf is applied along at least one of the longitudinal direction B or transverse direction A of the material layer 11, the stretchability test described herein is performed. xy When measured by [mean method], the material layer 11 having the S-shaped slit pattern unit 15 expands or contracts in at least one of the longitudinal direction B or transverse direction A by at least 650% (or about 650%), optionally at least 700% (or about 700%), optionally at least 750% (or about 750%), optionally at least 800% (or about 800%), optionally at least 900% (or about 900%), optionally at least 1000% (or about 1000%), optionally at least 1050% (or about about 1050%), optionally at least 1100% (or about 1100%), optionally at least 1125% (or about 1125%), or optionally at least 1150% (or about 1150%) more than the same material layer 11 without material areas.

[0051] Extensibility along the other (or remaining) longitudinal and transverse directions. At least one stretchability or elongation in the longitudinal or transverse direction is covered by the stretchability test described herein. xy In a particular embodiment determined as described above, the other (or remaining) longitudinal or transverse direction is also used in the stretch test described herein. xy This can be determined using the following: In the case of the "other" vertical or horizontal direction: In certain embodiments, when a force of 0.1 (or about 0.1) kgf is applied along the other longitudinal direction B or transverse direction A of the material layer 11, the stretchability test described herein is performed. xy When measured by [mean method], the material layer 11 having the S-shaped slit pattern unit 15 expands or contracts in the other longitudinal direction B or transverse direction A by at least 75% (or about 75%), optionally at least 100% (or about 100%), optionally at least 125% (or about 125%), optionally at least 150% (or about 150%), optionally at least 175% (or about 175%), or optionally at least 190% (or about 190%) more than the same material layer 11 without material areas. In certain embodiments, when a force of 0.2 (or about 0.2) kgf is applied along the other longitudinal B or transverse A of the material layer 11, the material layer 11 having the S-shaped slit pattern unit 15 expands or contracts in such other longitudinal B or transverse A by at least 150% (or about 150%), optionally at least 200% (or about 200%), optionally at least 250% (or about 250%), optionally at least 300% (or about 300%), optionally at least 350% (or about 350%), optionally at least 375% (or about 375%), or optionally at least 390% (or about 390%) more than the same material layer 11 without a material area. In certain embodiments, when a force of 0.3 (or about 0.3) kgf is applied along the other longitudinal direction B or transverse direction A of the material layer 11, the stretchability test described herein is performed. xyWhen measured by [mean method], the material layer 11 having the S-shaped slit pattern unit 15 expands or contracts in the other longitudinal direction B or transverse direction A by at least 350% (or about 350%), optionally at least 400% (or about 400%), optionally at least 425% (or about 425%), optionally at least 450% (or about 450%), or optionally at least 475% (or about 475%) more than the same material layer 11 without material areas. ·

[0052] Diagonal stretching In a particular embodiment, the material layer 11 is in the 45° diagonal direction D 45 or D' 45 When a force of 0.1 (or about 0.1) kgf is applied along at least one of the stretch test parameters, the stretch test described herein is performed. xyWhen measured by [method], the material layer 11 having the S-shaped slit pattern unit 15 is at least 425% (or about 425%), optionally at least 450% (or about 450%), optionally at least 500% (or about 500%), optionally at least 550% (or about 550%), optionally at least 600% (or about 600%), optionally at least 700% (or about 700%), optionally at least 800% (or about 800%), optionally at least 900% (or about 900%), optionally at least 1000% (or about 1000%), optionally at least 1100% (or about 1100%), optionally at least 1200% (or about 1200%), or optionally at least [percentage missing]. Also 1300% (or approximately 1300%), arbitrarily at least 1400% (or approximately 1400%), arbitrarily at least 1500% (or approximately 1500%), arbitrarily at least 1600% (or approximately 1600%), arbitrarily at least 1700% (or approximately 1700%), or arbitrarily at least 1800% (or approximately 1800%), arbitrarily at least 1900% (or approximately 1900%), arbitrarily at least 2000% (or approximately 2000%), arbitrarily at least 2100% (or approximately 2100%), arbitrarily at least 2200% (or approximately 2200%), or arbitrarily at least 2300% (or approximately 2300%), arbitrarily at least 2350% (or approximately 2350%), or arbitrarily at least 2375% (or approximately 2375%) more, in the 45° diagonal direction D 45 or D' 45 It expands or contracts. "45° diagonal direction D 45 " or "45° diagonal direction D' 45 " refers to a diagonal line that extends through the center point P and forms a 45° angle with the longitudinal and transverse centerlines of the material layer 11 that intersect at the center point P.

[0053] In a particular embodiment, the material layer 11 is in the 45° diagonal direction D 45 or D' 45 When a force of 0.2 (or about 0.2) kgf is applied along at least one of the stretch test parameters, the stretch test described herein is performed. xyWhen measured by [method], the material layer 11 having the S-shaped slit pattern unit 15 is at least 1125% (or about 1125%), optionally at least 1150% (or about 1150%), optionally at least 1175% (or about 1175%), optionally at least 1200% (or about 1200%), or optionally at least 1300% (or about 1300%), optionally at least 1400% (or about 1400%), optionally at least 1500% (or about 1500%), and optionally at least 1600% (or about 1600%) compared to the same material layer without the S-shaped slit pattern unit 15. %), any at least 1700% (or about 1700%), any at least 1800% (or about 1800%), any at least 1900% (or about 1900%), any at least 2000% (or about 2000%), any at least 2100% (or about 2100%), any at least 2200% (or about 2200%), any at least 2300% (or about 2300%), any at least 2400% (or about 2400%), any at least 2500% (or about 2500%), or any at least 2550% (or about 2550%) more, in the 45° diagonal direction D 45 or D' 45 It stretches or expands.

[0054] In a particular embodiment, the material layer 11 is in the 45° diagonal direction D 45 or D' 45 When a force of 0.3 (or about 0.3) kgf is applied along at least one of the stretch test parameters, the stretch test described herein is performed. xyWhen measured by the same material layer 11 having the S-shaped slit pattern unit 15 is at least 1725% (or about 1725%), optionally at least 1800% (or about 1800%), optionally at least 1800% (or about 1800%), optionally at least 1900% (or about 1900%), optionally at least 2000% (or about 2000%), optionally at least 2100% (or about 2100%), optionally at least 2200% (or about 2200%), optionally at least 2300% (or about 2300%), optionally at least 2325% (or about 2325%), or optionally at least 2350% (or about 2350%) more than the same material layer without the S-shaped slit pattern unit 15, in the 45° diagonal direction D 45 or D' 45 It stretches or expands.

[0055] In a particular embodiment, the material layer 11 is in the 45° diagonal direction D 45 or D' 45 When a force of 0.4 (or about 0.4) kgf is applied along at least one of the stretch test parameters, the stretch test described herein is performed. xy When measured by the same material layer 11 having the S-shaped slit pattern unit 15 is at least 1650% (or about 1650%), optionally at least 1700% (or about 1700%), optionally at least 1750% (or about 1750%), optionally at least 1800% (or about 1800%), optionally at least 1800% (or about 1800%), optionally at least 1900% (or about 1900%), optionally at least 2000% (or about 2000%), optionally at least 2100% (or about 2100%), optionally at least 2125% (or about 2125%), or optionally at least 2150% (or about 2150%) more than the same material layer without the S-shaped slit pattern unit 15, in the 45° diagonal direction D 45 or D' 45 It stretches or expands.

[0056] Stretchability test xy The stretching or tensile force used to perform this action is in the longitudinal, transverse, and 45° diagonal directions (B, A, D) as described above.45 , and D' 45 The ) lies in the xy plane and is illustrated in Figure 8. The term “longitudinal direction” refers to the mechanical direction of the material layer when formed using a continuous manufacturing process. As used herein, the term “mechanical direction” means the direction along the length of the roll layer of material, or the direction in which the material flows into the substrate forming machine in a continuous manufacturing process. “Transverse direction” is the direction of travel transverse to the longitudinal direction.

[0057] In a particular embodiment, when a force of 0.1 kgf is applied along the z-axis of the material layer 11 (or in a direction perpendicular to its xy-plane), the stretchability test described herein is performed. z When measured, the material layer 11 having the S-shaped slit pattern unit 15 expands or contracts by approximately 1 mm to approximately 5 mm, and optionally approximately 4 mm to approximately 5 mm, along the z-axis or in the z-direction, away from the xy-plane of the material layer 11.

[0058] In a particular embodiment, when a force of 0.5 kgf is applied along the z-axis of the material layer 11 (or in a direction perpendicular to its xy-plane), the stretchability test described herein is performed. z When measured by [mean], the material layer 11 having the S-shaped slit pattern unit 15 expands or contracts by approximately 1 mm to approximately 10 mm, optionally approximately 1 mm to approximately 8 mm, or optionally approximately 8 mm to 10 mm, away from the xy plane of the material layer 11 along the z axis or in the z direction.

[0059] In certain embodiments, to improve the elasticity or stretchability of the material layer 11 in the z-axis direction (or along the z-axis) (or perpendicular to the xy-plane), the pattern units (or slit pattern units) 15 are arranged in 4 to 14 pattern units / in 2 10-14 pattern units / in (arbitrarily) 2 or, optionally, 12 pattern units / in 2 It is formed in a material layer 11 having dimensions that provide a pattern surface density.

[0060] In a particular embodiment, the material layer 11 having the S-shaped slit pattern unit 15 satisfies any one, any combination, or all of the above-described stretch parameters using the stretchability test described below.

[0061] Elasticity test: The directional stretchability of the first-aid supplies of the present invention is measured using the following stretchability test procedure, and the stretchability test is performed in the longitudinal, transverse, and 45° diagonal directions of the material layers. 45 Includes a test procedure for testing the elasticity or stretchability of a material layer along the direction of: Stretchability test xy - A test to measure the displacement of a material layer under a force F along the xy-plane direction of the material layer.

[0062] Stretchability test xy This is modeled after ASTM D882, Standard Test Method for Tensile Properties of Thin Plastic Sheeting (ASTM International, West Conshohocken, PA, 2016). The procedure of ASTM D882 was slightly modified as follows: The material layer of the sample was clamped between two gripping planes and attached to a load cell, and tension was applied at a constant speed. With the force applied to the sample, both clamps were moved in both directions (both directions oriented longitudinally and transversely to the sample, and in the 45° diagonal directions where the sample is tilted negatively and positively). 45 Stretch the sample in both directions (including those oriented along the curve) until a fracture occurs. Measure the sample three times. The test is performed at 23°C and 50% relative humidity.

[0063] A. Equipment: The test apparatus used is the Instru-Met & Instron 1122 (Instru-Met Corporation, Union, NJ 07083), which has Instru-Met Pneumatic Wedge Action Grips.

[0064] B. Procedure: a) A sample (a sample having a material-free slit pattern unit) is prepared by cutting the layer material having the slit (or material-free region) of the present invention into a 5-inch × 1-inch strip. i. The material layer used to prepare the sample is a two-layer substrate consisting of the following: A nonwoven fabric layer is produced from 100% PET fibers with a fiber length of approximately 38 mm by passing the fibers through a dry carding process to form blanket rolls, and then through a needle punching process. The nonwoven fabric has a weight of 3.7 oz / square yard. • A non-adhesive HDPE net is heat-laminated onto a nonwoven fabric substrate. This net has the following characteristics: - Thickness = 102-127 microns - Number of bosses: Vertical: 22-28 bosses / inch, Horizontal: 27-33 bosses / inch - Aperture (pore) size approximately 300 μm - Basis weight = 0.48~0.59 oz / square yard -Geometric shape = hexagon. Such HDPE nets are Delnet® AC530WHT nets and are available from Delnet Technologies (Del.). The above two-layer material is available from Delstar Technologies, DEL under the name Stratex® 3.7NPET-E (which incorporates Delnet® AC530WHT netting). ii. The slit pattern units formed in the material layer are incorporated using a 90-watt CO2 laser (Full Spectrum Laser [NV], Model P2012) with a laser thickness of 406 μm, such that the slit pattern units are arranged as a parallel matrix of slit pattern units having the following measurements: • The slit pattern unit has 12 slit pattern units / in 2 Provides the surface density of slit pattern units (counting only complete pattern units). The slit pattern unit covers 100% of the surface area of ​​the material layer. b) Prepare a control sample (i.e., a sample without slits [or material-free areas]) by cutting the layer material without slits into 5-inch x 1-inch strips. i. The material layer used in this process is the same as the material layer in process a). c) Test samples and control samples are prepared by placing them in a room at 23±1°C and 50±2% relative humidity for 24 hours. d) The grips of the test apparatus are 2 inches apart. e) Place the control sample to be tested into the grip of the test apparatus and fasten it securely. f) The sample must be free of any tension. g) A force is applied to the sample in the mechanical direction (or longitudinal direction B), keeping one grip stationary and moving the other grip in the opposite direction at a constant speed (12 inches / min) as specified in the internal test criteria. h) Continue applying force until the sample yields (i.e., a fracture occurs somewhere in the sample). i) Record the applied force at percentage displacements (or stretches) of the sample length (along each direction of the force) of 2%, 5%, 10%, 25%, and 50% in the MTS Test Works 4.12F software application (Instru-Met Corporation, NJ). j) Test the test sample according to steps e) to i). k) Repeat steps e) to j) above two more times using different test samples and control samples. l) Next, average and record the data recorded in the MTS Test Works 4.12F software for each control sample and test sample in increments of 2%, 5%, 10%, 25%, and 50%. m) Calculate the percentage difference in directional elongation in the longitudinal (or mechanical direction) between the test sample and the control sample under a given force and force direction, using data recorded in the MTS Test Works 4.12F software. n) Lateral direction A (or transverse direction), and (as illustrated in Figure 8), both "45°" diagonal directions D 45 For each of these, repeat steps a) to n).

[0065] Stretchability test z - A test to measure the displacement of a material layer under a force F along the z-axis (or direction) of the material layer.

[0066] Stretchability test z This test is modeled after ASTM D3787-16, Standard Test Method for Bursting Strength of Textiles (ASTM International, West Conshohocken, PA, 2016). The ASTM D3787-16 procedure was slightly modified and performed as follows: The sample is clamped between two grooved circular plates. A second component (ball attachment) is fixed to a load cell and a compressive force is applied by a constant-speed moving test machine. Force is applied with a polished and hardened steel ball until the nonwoven portion of the material breaks. The material was tested to show displacement under a specific range of loads. Both nonwoven and laminated nonwovens were tested. The tests were performed at 23°C and 50% relative humidity.

[0067] A. Equipment: The test apparatus used is an ASTM D3787 Burst Fixture from Instru-Met & Instron 1122 & 5543 (Instru-Met Corporation, Union, NJ 07083), which includes a 44.5 mm ID ring clamp and a 25.4 mm spherical plunger. The throat of the Burst Fixture was modified by extending its length from its original 2.5 inches to 3.75 inches, and the spring below the clamp screw was removed to ensure clamping force.

[0068] B. Procedure: a) Prepare a test specimen (a specimen with a material-free slit pattern unit) by cutting the layer material into a circular notch with a diameter of 3 × 3 / 4. i. The material layer used to prepare the sample is a two-layer substrate consisting of the following: A nonwoven fabric layer is produced from 100% PET fibers with a fiber length of approximately 38 mm by passing the fibers through a dry carding process to form blanket rolls, and then through a needle punching process. The nonwoven fabric has a weight of 3.7 oz / square yard. • A non-adhesive HDPE net is heat-laminated onto a nonwoven fabric substrate. This net has the following characteristics: - Thickness = 102-127 microns - Number of bosses: Vertical: 22-28 bosses / inch, Horizontal: 27-33 bosses / inch - Aperture (pore) size approximately 300 μm - Basis weight = 0.48~0.59 oz / square yard -Geometric shape = hexagon. Such HDPE nets are Delnet® AC530WHT nets and are available from Delnet Technologies (Del.). The above two-layer material is available from Delstar Technologies, DEL under the name Stratex® 3.7NPET-E (which incorporates Delnet® AC530WHT netting). ii. The slit pattern units formed in the material layer are incorporated using a 90-watt CO2 laser (Full Spectrum Laser [NV], Model P2012) with a laser thickness of 406 μm, such that the slit pattern units are arranged as a parallel matrix of slit pattern units having the following measurements: ■ The slit pattern unit has 12 slit pattern units / in 2 Provides the surface density of slit pattern units (counting only complete pattern units). ■ The slit pattern unit covers 100% of the surface area of ​​the material layer. b) A control sample (i.e., a sample without slits [or material-free regions]) was prepared by cutting a layered material without slits into 5-inch strips using 1-inch strips. i. The material layer used in this process is the same as the material layer in process a). c) Test samples and control samples are prepared by placing them in a room at 23±1°C and 50±2% relative humidity for 24 hours. d) Place the sample to be tested in the ring clamp of the test apparatus and fasten it securely. e) The sample must be free of any tension. f) The force is applied to the sample in the z direction (i.e., perpendicular to the xy plane of the sample) by a spherical plunger at a constant speed (25.4 mm / min) as specified in the internal test standards, and then the speed is reduced to 5.08 mm / min. g) Continue applying force until the sample yields (i.e., a fracture occurs somewhere in the sample). h) The applied force during the displacement (or stretching) of the length of samples of 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 15 mm, and 20 mm (along the z-direction of the force) was recorded (as kgf) in the MTS Test Works 4.12F software application (Instru-Met Corporation, NJ). i) Test the test sample according to steps d) to h). j) Repeat steps d) to i) above two more times using different test samples and control samples. k) Next, average the data recorded in the MTS Test Works 4.12F software for displacement increments of 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 15 mm, and 20 mm, and record the result.

[0069] Furthermore, the S-shaped slit pattern unit 15 also provides a first-aid product 10 that readily conforms to or hangs over tissue in contact with or covered by the first-aid product 10, allowing the first-aid product 10 to move with the tissue but still maintain coverage of or contact with the skin and / or wound.

[0070] Removable layer In certain embodiments, the first aid device 10 (optionally including any additional layers 20 [discussed in further detail below]) also comprises a removable layer 17 that is removablely disposed on (or in contact with) i) a material layer 11, or ii) a first aid device 10 comprising a material layer 11. In certain embodiments, the removable layer 17 is removablely in contact with and covers any adhesive that may be disposed on the material layer 11. In some embodiments, the removable layer 17 is in contact with (or removablely attached to) the material layer 11 or the first aid device 10 while (or when) the unmaterialized area 15 is in a closed position. In some embodiments, the removable layer 17 is detachably in contact with (or detachably attached to) the material layer 11 or the first aid item 10 such that the unmaterialized area 15 is detachably held in a closed position until the removable layer 17 is removed from the material layer 11 or the first aid item 10, thereby allowing the unmaterialized area 15 to be easily opened when a force F is applied (and, accordingly, closed when such force F is released), as described above. In certain embodiments, the removable layer 17 may include or be made from polyethylene, polypropylene, kraft paper, polyester, or a composite of any of these materials.

[0071] Optional components In certain embodiments, the first-aid product 10 further incorporates an adhesive (not shown) on at least one of its surfaces 12 and / or 13, positioned between the removable layer and the material layer, to provide adhesion of the first-aid product 10 to the skin and / or wound. When incorporated onto the first-aid product 10, the adhesive is applied in such a way that it does not restrict or inhibit the openness of individual material-free areas that are freely open and closed. Generally, any of the various pressure-sensitive adhesives can be used as the adhesive. Specifically, typically, pressure-sensitive adhesives that are biocompatible with human skin are used. In some embodiments, the adhesive of the present invention may also be either mostly water-soluble, mostly non-water-soluble, or dispersible in an aqueous environment. For example, a commercially available dispersible pressure-sensitive adhesive is sold under trade name HL-9415-X and is available from HBFuller Company. (Margin). Other suitable adhesives include about 10-75% by weight of a polyalkyloxazoline polymer, 10-75% by weight of a functional diluent containing a hydroxy compound or carboxylic acid compound, and 5-50% by weight of a tackifier.

[0072] The adhesive may contain a hydrocolloid. The hydrocolloid component used may be any substance that performs well in this application, such as, for example, sodium carboxymethylcellulose, pectin, xanthan gum, polysaccharides, sodium or calcium alginate, chitosan, seaweed extract (carrageenan), polyaspartic acid, polyglutamic acid, hyaluronic acid, or salts and derivatives thereof.

[0073] In particular, hydrophilic colloids such as sodium carboxymethylcellulose and pectin are substances that form gels as soon as they come into contact with bodily fluids from a wound. When used in adhesive bandages, these hydrocolloids are combined with elastomers and / or adhesives. Preferably, the bandage needs to provide a moist environment free from infiltration or scar formation, which is a suitable condition for accelerating healing.

[0074] The adhesive may be any conventional adhesive known for such use, such as acrylic adhesives, among other things. Furthermore, such adhesive may contain resins to enhance adhesion, flocculants, absorbents (preferably polyacrylate superabsorbents, polyacrylate salt superabsorbents, or mixtures thereof), plasticizers, and optionally pigments. The adhesive layer may further consist of an elastomer substrate and be arranged in a discontinuous pattern, such as by lines, screens, sprays, or any other that a person skilled in the art would understand as discontinuous.

[0075] Optionally, one or more additional layers (or base layers) 20, comprising a single layer or multiple layers (or base layers), are positioned on the material layer 11, either on the surface side of the material layer 11 opposite the removable layer 17, or between the material layer 11 and the removable layer 17. In such embodiments, the material layer 11 is not attached to any additional layer 20, thereby significantly limiting or suppressing the opening and closing of the unmaterialized areas 15. In certain embodiments, the additional layer 20 may or may not incorporate the unmaterialized areas 15. In embodiments in which the additional layer 20 incorporates the unmaterialized areas 15, the unmaterialized areas 15 of the additional layer 20 form the same or similar pattern units as the pattern units formed by the unmaterialized areas 15 of the material layer 11, and in certain such embodiments, the pattern units of the additional layer 20 are also aligned with the pattern units of the material layer 11. As shown in Figure 7, the additional layer 20 can be incorporated in single-layer or multi-layer form to act as a protective backing layer for the material layer 11. Alternatively, as shown in Figure 6, such additional layer 20 may act as a pad layer, or include one, providing absorption and / or swelling properties. In certain embodiments, the additional layer 20 comprises (optionally, in the form of a slit pattern) the material-free region 15 of the present invention. In certain embodiments, the additional layer 20 does not include, or substantially does not include, the material-free region of the present invention, and in such one embodiment, the additional layer 20 acts as a protective non-adhesive layer (with or without openings) positioned on the surface of the material layer 11 facing the user's skin (and / or wounds on such skin).

[0076] In certain embodiments, when the additional layer 20 acts as a pad layer, the additional layer 20 includes a first surface facing a first side of the material layer 11 and having a first surface area, and a second surface opposite the first surface and facing the skin and having a second surface area. The pad layer can be formed from an open-processed fiber material, a porous fiber material, a natural fiber material, or a synthetic fiber material, such as the material used to form gauze. Suitable pad layer materials include, but are not limited to, PET fibers. The pad layer typically comes into contact with the skin surface and / or the wound to absorb wound exudate or secretions. In certain embodiments, when the additional layer 20 acts as a pad layer, the additional layer 20 can be fixed directly or indirectly to the material layer 11 so that the additional layer does not separate from the material layer 11 during normal use.

[0077] When used as a backing layer, the additional layer 20 can have a variety of shapes, including but not limited to rectangular, elliptical, egg-shaped, or rectangular. In such embodiments, the shape of the bandage and tape 10 is defined by the shape of the additional layer 20. In some such embodiments, the additional layer 20 may be thin, highly flexible or deformable, water-impermeable, and transparent or opaque. Generally, in some such embodiments, the thickness of the additional layer 20 is about 0.05 to 0.2 millimeters ("mm") to achieve the desired forming and bending properties.

[0078] In certain embodiments where the additional layer 20 acts as a backing layer, the material used to form the additional layer 20 must have both conformability to the body's contours and flexibility to allow free movement of the body part wearing the product. In certain embodiments, this may be a film or a foam. Useful polymer materials for forming the backing layer include polyolefins (such as polyethylene), polyurethane, and polyvinyl chloride. Other examples of backing materials, but not limited to these, include nonwoven, woven, or knitted fabrics such as cotton, polyester, polyurethane, and rayon.

[0079] A polyethylene film can be optionally used to form the additional layer 20 when the additional layer 20 acts as a backing layer 20, in which case particularly effective results can be achieved by a stretchable elastomer film made of polyurethane, which has the additional advantage of gas (including water vapor) permeability. However, in such cases, it is understood that other flexible, water-insoluble polymer films known in the art may be used. Furthermore, when the additional layer 20 is used as a backing layer, the additional layer 20 can be formed from a closed-pore polymer foam, in particular, such that the integrated skin covers the sides of the closed-pore polymer foam that are facing away from the user's skin. In certain such embodiments, a foam layer made of polyurethane or polyethylene is suitable, but other polymer foams having similar properties can be used. In other embodiments, when the additional layer 20 is used as a backing layer, the additional layer 20 can be made from other polyolefins, vinyl polyethylene acetate, nonwoven fabrics for textiles, rubber, or other materials known in the art of adhesive articles. In a particular embodiment, when the additional layer 20 acts as a backing layer, the polymer used to form the additional layer 20 generally has a viscosity of about 500 to 500,000 centipoise at a temperature of about 190°C, or about 1,000 to 30,000 centipoise at a temperature of about 190°C, or about 3,000 to 15,000 centipoise at a temperature of about 190°C.

[0080] In certain embodiments, when the additional layer 20 acts as a backing layer, the additional layer 20 can be liquid-impermeable but gas-permeable, which allows the wound and skin to which the bandage and tape 10 of the present invention is adhered to breathe. In one embodiment, when the additional layer 20 acts as a backing layer, the additional layer 20 can have pores of a size that allows only gases having extremely small molecules to pass through.

[0081] Finally, if the additional layer 20 acts as a backing layer, the additional layer 20 can be perforated for further ventilation of the skin. In certain such embodiments, the perforations may be circular in shape and have a diameter in the range of about 0.1 to about 0.8 millimeters. However, in certain other embodiments, if the additional layer 20 acts as a backing layer, the additional layer 20 may be gas-impermeable as needed.

[0082] The present invention is further illustrated by the following embodiments, which are presented for illustrative and comparative purposes. [Examples]

[0083] Comparative Example 1: Extensible displacement of a material layer with a slit pattern unit, as shown in Figure 9, under forces along various directions in the xy-plane.

[0084] The test samples and control samples underwent stretchability testing. xy The samples were prepared and measured according to the present invention to determine the percentage difference (% difference) in tensile strength along a given direction at a force F between a sample with slits (test sample) and a sample without slits (control sample). The test sample incorporates the slit pattern unit shown in Figure 9. In Figure 8, the vertical, horizontal, and diagonal directions D45 and D'45 are defined as the vertical, horizontal, and 45° diagonal directions (B, A, D 45 , and D' 45 The data is shown as follows: Tables 1 to 4 and Tables 1a to 4a show the extensibility or elongation data and the calculated percentage difference for various stretching and contracting directions.

[0085]

number

[0086] [Table 1]

[0087] [Table 2]

[0088] [Table 3]

[0089] [Table 4]

[0090] [Table 5]

[0091] [Table 6]

[0092] [Table 7]

[0093] [Table 8]

[0094] Tables 1a, 2a, 3a, and 4a show that the slit pattern unit in Figure 9 provides a certain degree of material layer extensibility that exceeds the extensibility of a material layer without any slits.

[0095] Example 2 of the present invention: Extensible displacement of a material layer with the slit pattern unit shown in Figure 2 under forces along various directions in the xy-plane.

[0096] The test samples and control samples underwent stretchability testing. xyThe samples were prepared and measured according to the present invention to determine the percentage difference in tensile strength along a given direction at a force F between a sample with slits (test sample) and a sample without slits (control sample). The test sample incorporates the slit pattern unit shown in Figure 2. In Figure 8, the longitudinal, transverse, and diagonal directions D45 and D'45 are defined as the longitudinal, transverse, and 45° diagonal directions (B, A, D 45 , and D' 45 The data is presented as follows: The data is summarized in Tables 5 to 8 and Tables 5a to 8a, respectively, as tensile or elongation data and the calculated percentage difference for various stretching and contracting directions.

[0097] [Table 9]

[0098] [Table 10]

[0099] [Table 11]

[0100] [Table 12]

[0101] [Table 13]

[0102] [Table 14]

[0103] [Table 15]

[0104] [Table 16]

[0105] When compared with Tables 1a and 2a of Comparative Example 1, Tables 5a and 6a of Example 2 of the present invention show that the material layer having the slit pattern unit of Figure 2 provides greater elongation than the material layer having the slit pattern unit of Figure 9 when subjected to a force of 0.1 to 0.4 kgf in at least one of the longitudinal or transverse directions, and when subjected to a force of 0.1 to 0.3 kgf in the other (or remaining) longitudinal or transverse direction.

[0106] In addition, Table 7a shows the following two patterns regarding extensibility in at least one of the 45° diagonal directions, compared to Table 3a. Table 7a shows that the slit pattern unit in Figure 2 provides greater stretching in at least one of the 45° diagonal directions than the material layer having the slit pattern unit in Figure 9, at forces of 0.1 to 0.4 (as shown in Table 3a). (Margin)

[0107] Example 3 To compare the z-direction stretchability of the prepared test sample and control sample of the slit pattern unit shown in Figure 2, a test sample and a control sample were prepared and stretchability test was performed. z Measurements were taken at forces of 0.1 kgf and 0.5 kgf accordingly. The results are summarized in Tables 9 and 9a, respectively.

[0108] [Table 17]

[0109] Table 9 shows that the material layer having the slit pattern unit shown in Figure 2 allows for a greater degree of motion in the z direction (or along the z axis) at a force of 0.1 kgf than the material layer without any slits at the same force.

[0110] [Table 18]

[0111] Table 9a shows that the material layer having the slit pattern unit shown in Figure 2 allows for a greater degree of motion in the z direction (or along the z axis) at a force of 0.5 kgf than the material layer without any slits at the same force.

[0112] Those skilled in the art will understand that modifications can be made to the exemplary embodiments shown and described above without departing from the broader concept of the invention. Therefore, it will be understood that the present invention is not limited to the illustrated and described exemplary embodiments, but is intended to encompass modifications within the spirit and scope of the invention as defined by the claims. For example, certain features of the exemplary embodiments may or may not be part of the claimed invention, and features of the disclosed embodiments may be combined.

[0113] It is understood that at least some of the drawings and descriptions of the present invention have been simplified in order to focus on elements relevant to an obvious understanding of the invention.

[0114] Furthermore, unless any method depends on a particular order of steps described herein, no particular order of steps should be construed as a limitation to the claims. The claims relating to the methods of the present invention should not be limited to the execution of the steps in the order described, and those skilled in the art will readily recognize that the steps may be modified but still remain within the spirit and scope of the invention.

[0115] Embodiments of the Invention Embodiment 1. A first aid product comprising a material layer, the layer comprising a plurality of material-free regions, the material-free regions in the form of S-shaped pattern units, the S-shaped patterns being subjected to the stretchability test described herein when a force of about 0.1 kgf is applied along at least one of the 45° diagonal directions of the material layer. xy A first aid product having dimensions, orientation, and arrangement such that, when measured by [method], the material layer extends at least approximately 425% more in the 45° diagonal direction than the same material layer without a material area.

[0116] Embodiment 2. The treatment device according to Embodiment 1, wherein the material-free area is a slit in the material layer.

[0117] Embodiment 3. The first aid supplies according to Embodiments 1 and / or 2, wherein the patterns do not intersect and are arranged adjacent to one or more linear rows.

[0118] Embodiment 4. The first aid supplies according to any one or a combination of Embodiments 1 to 3, wherein the rows of straight lines are parallel to each other.

[0119] Embodiment 5. The first aid product according to any one or a combination of Embodiments 1 to 4, wherein each S-shaped pattern has a top and a bottom, and further, the top and bottom of any S-shaped pattern in a given row are aligned with the top and bottom of other similarly oriented S-shaped patterns in that row.

[0120] Embodiment 6. The first aid product according to any one or a combination of Embodiments 1 to 5, wherein the S-shaped patterns have a length l, and optionally, the length l of at least one S-shaped pattern is oriented perpendicular to the length l of an adjacent S-shaped pattern.

[0121] Embodiment 7. The first aid product according to any one or a combination of Embodiments 1 to 6, wherein the length l of each S-shaped pattern in a row is oriented perpendicular to the length l of the adjacent S-shaped pattern in that row.

[0122] Embodiment 8. The first aid product according to any one or a combination of Embodiments 1 to 7, wherein the S-shaped pattern has a width w, and further, the length l of the S-shaped pattern is about 1 to about 6 times the width w of the S-shaped pattern.

[0123] Embodiment 9. The surface density of pattern units per square inch on the surface of the material layer is approximately 10 pattern units / inch on the surface of the material layer. 2 ~Approximately 14 pattern units / in 2 The first aid supplies described in any one or combination of Embodiments 1 to 8.

[0124] Embodiment 10. When a force of about 0.2 kgf is applied along at least one of the 45° diagonal directions of the material layer, the stretchability test described herein is performed. xy A medical device according to any one or a combination of embodiments 1 to 9, wherein, when measured by [method], the material layer extends at least about 1125% more in the 45° diagonal direction than the same material layer without a material-free region.

[0125] Embodiment 11. When a force of about 0.3 kgf is applied along at least one of the 45° diagonal directions of the material layer, the stretchability test described herein is performed. xy A medical device according to any one or a combination of embodiments 1 to 10, wherein, when measured by [method], the material layer extends at least about 1725% more in the 45° diagonal direction than the same material layer without a material-free region.

[0126] Embodiment 12. When a force of about 0.4 kgf is applied along at least one of the 45° diagonal directions of the material layer, the stretchability test described herein is performed. xy A medical device according to any one or a combination of embodiments 1 to 11, wherein, when measured by, the material layer extends at least about 1650% more in the 45° diagonal direction than the same material layer without a material area.

[0127] Embodiment 13. When a force of about 0.1 kgf is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein is performed. xy A medical aid according to any one or combination of Embodiments 1 to 12, wherein, when measured by [method], the material layer elongates in the longitudinal or transverse direction by at least about 100% more than the same material layer without a material area.

[0128] Embodiment 14. When a force of about 0.2 kgf is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein is performed. xy A medical aid according to any one or combination of Embodiments 1 to 13, wherein, when measured by means of a material layer, the material layer extends at least about 150% more in the longitudinal or transverse direction than the same material layer without a material area.

[0129] Embodiment 15. When a force of about 0.3 kgf is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein is performed. xy A medical device according to any one or combination of Embodiments 1 to 14, wherein, when measured by [method], the material layer elongates in the longitudinal or transverse direction by at least about 425% more than the same material layer without a material region.

[0130] Embodiment 16. When a force of about 0.1 kgf is applied along the longitudinal or transverse direction of the other material layer, the stretchability test described herein is performed. xy A medical device according to any one or combination of embodiments 13 to 15, wherein, when measured by means of the same material layer, the material layer extends at least about 75% more in the longitudinal or transverse direction than the same material layer without a material area.

[0131] Embodiment 17. When a force of about 0.2 kgf is applied along the longitudinal or transverse direction of the other material layer, the stretchability test described herein is performed. xyA medical device according to any one or combination of embodiments 13 to 15, wherein, when measured by means of the same material layer, the material layer extends at least about 150% more in the other longitudinal or transverse direction than the same material layer without a material area.

[0132] Embodiment 18. When a force of approximately 0.5 kgf is applied along the z-direction of the material layer, the stretchability test described herein is performed. z A medical device according to any one or combination of embodiments 1 to 17, wherein, when measured by [method], the material layer extends at least about 1 mm to about 8 mm in the z direction from the xy plane of the material layer.

[0133] Embodiment 19. A treatment device according to any one or a combination of Embodiments 1 to 18, further comprising an adhesive disposed between a removable layer and a material layer.

[0134] Embodiment 20. A first-aid product according to any one or a combination of Embodiments 1 to 19, wherein the removable layer comprises polyethylene, polypropylene, kraft paper, polyester, or a composite thereof.

[0135] [Implementation Method] (1) A first-aid product comprising a material layer, the layer comprising a plurality of material-free regions, the material-free regions being in the form of S-shaped pattern units, the S-shaped patterns being subjected to the stretchability test described herein when a force of about 0.98 N (about 0.1 kgf) is applied along at least one of the 45° diagonal directions of the material layer. xy A first aid product having dimensions, orientation, and arrangement such that, when measured by, the material layer extends at least about 425% more in the 45° diagonal direction than the same material layer without a material area. (2) The treatment product according to Embodiment 1, wherein the material-free area is a cut or slit in the material layer. (3) The first aid product according to Embodiment 1, wherein the patterns do not intersect and are arranged adjacent to each other to form one or more linear rows. (4) The first aid supplies according to Embodiment 3, wherein the rows of straight lines are parallel to each other. (5) The first aid according to Embodiment 1, wherein each S-shaped pattern has a top, and further, the bottom of any S-shaped pattern in a given row is aligned with the tops and bottoms of other S-shaped patterns in the row.

[0136] (6) The first aid according to Embodiment 1, wherein the S-shaped pattern has a length l, and optionally, the length l of at least one S-shaped pattern is oriented perpendicular to the length l of an adjacent S-shaped pattern. (7) The first aid according to Embodiment 6, wherein the length l of each S-shaped pattern in a row is oriented perpendicular to the length l of the adjacent S-shaped pattern in the row. (8) The first aid according to embodiment 6, wherein the S-shaped pattern has a width w, and further, the length l of the S-shaped pattern is about 1 to about 6 times the width w of the S-shaped pattern. (9) The surface density of pattern units per square inch on the surface of the material layer is approximately 10 pattern units / inch on the surface of the material layer. 2 ~Approximately 14 pattern units / in 2 The first aid supplies described in Embodiment 1. (10) When a force of about 1.96 N (about 0.2 kgf) is applied along at least one of the 45° diagonal directions of the material layer, the stretch test described herein is performed. xy The first aid product according to Embodiment 1, wherein, when measured by [method], the material layer extends at least about 1125% more in the 45° diagonal direction than the same material layer without a material region.

[0137] (11) When a force of about 2.94 N (about 0.3 kgf) is applied along at least one of the 45° diagonal directions of the material layer, the stretch test described herein is performed. xy The first aid product according to Embodiment 1, wherein, when measured by [method], the material layer extends at least about 1725% more in the 45° diagonal direction than the same material layer without a material region. When a force from about 3.92 N (about 0.4 kgf) is applied along at least one of the 45° diagonal directions of the material layer, the stretchability test described herein xy The hand care article according to Embodiment 1, wherein when measured by, the material layer stretches at least about 1650% more in the 45° diagonal direction than the same material layer without a material-free region. (13) When a force from about 0.98 N (about 0.1 kgf) is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein xy The hand care article according to Embodiment 1, wherein when measured by, the material layer stretches at least about 100% more in the longitudinal or transverse direction than the same material layer without a material-free region. (14) When a force from about 1.96 N (about 0.2 kgf) is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein xy The hand care article according to Embodiment 1, wherein when measured by, the material layer stretches at least about 150% more in the longitudinal or transverse direction than the same material layer without a material-free region. (15) When a force from about 2.94 N (about 0.3 kgf) is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein xy The hand care article according to Embodiment 1, wherein when measured by, the material layer stretches at least about 425% more in the longitudinal or transverse direction than the same material layer without a material-free region.

[0138] (16) When a force from about 0.98 N (about 0.1 kgf) is applied along the other longitudinal or transverse direction of the material layer, the stretchability test described herein xy The hand care article according to Embodiment 13, wherein when measured by, the material layer stretches at least about 75% more in the other longitudinal or transverse direction than the same material layer without a material-free region. (17) When a force of approximately 1.96 N (approximately 0.2 kgf) is applied along the longitudinal or transverse direction of the other material layer, the stretchability test described herein is performed. xy The first aid product according to Embodiment 14, wherein, when measured by [method], the material layer extends at least about 150% more in the other longitudinal or transverse direction than the same material layer without a material region. (18) When a force of approximately 4.90 N (approximately 0.5 kgf) is applied along the z-direction of the material layer, the stretchability test described herein is performed. z The first aid product according to Embodiment 1, wherein, when measured by [method], the material layer extends at least about 1 mm to about 8 mm in the z direction away from the xy plane of the material layer. (19) The first aid according to Embodiment 1, further comprising an adhesive disposed between the removable layer and the material layer. (20) The first aid product according to Embodiment 1, wherein the removable layer comprises polyethylene, polypropylene, kraft paper, polyester, or a composite thereof.

Claims

1. In adhesive bandages, (a) A first-aid product comprising a material layer, wherein the material layer comprises a laminate having a nonwoven fabric layer containing polyester fibers and a non-adhesive high-density polyethylene net, and the material layer comprises a plurality of material-free regions, (i) The unmaterialized area is in the form of a curved S-shaped pattern unit, and the curved S-shaped pattern unit undergoes the stretchability test described herein when a force of 1.96 N (0.2 kgf) is applied along at least one of the 45° diagonal directions of the material layer. ｘｙ When measured by [method], the material layer is sized, oriented, and arranged in a regular pattern such that it extends at least 1125% more in the 45° diagonal direction than the same material layer without a material area. (ii) A first aid product wherein the curved S-shaped pattern unit has a width w and a length l, and the length l of the curved S-shaped pattern unit is 1 to 6 times the width w of the curved S-shaped pattern unit, (b) A backing layer comprising an elastomer film and disposed on the material layer, (c) comprising an adhesive layer, An adhesive bandage that, when applied to the user's skin, allows the bandage to stretch and contract with the skin.

2. The adhesive bandage according to claim 1, wherein the material-free region is a cut or slit in the material layer.

3. The adhesive bandage according to claim 1, wherein the curved S-shaped pattern units do not intersect and are arranged adjacent to each other to form one or more straight rows.

4. The adhesive bandage according to claim 3, wherein the rows of straight lines are parallel to each other.

5. The adhesive bandage according to claim 1, wherein each of the curved S-shaped pattern units has a top and a bottom, and further, the bottom of any of the curved S-shaped pattern units in a given row is aligned with the top and bottom of any other curved S-shaped pattern units in the row.

6. The adhesive bandage according to claim 1, wherein the length l of at least one of the curved S-shaped pattern units is oriented perpendicularly to the length l of an adjacent curved S-shaped pattern unit.

7. The adhesive bandage according to claim 6, wherein the length l of each of the curved S-shaped pattern units in a row is oriented perpendicularly to the length l of the adjacent curved S-shaped pattern units in the row.

8. When a force of 2.94 N (0.3 kgf) is applied along at least one of the 45° diagonal directions of the material layer, the stretchability test described herein is performed. ｘｙ The adhesive bandage according to claim 1, wherein, when measured by [method], the material layer stretches at least 1725% more in the 45° diagonal direction than the same material layer without a material region.

9. When a force of 3.92 N (0.4 kgf) is applied along at least one of the 45° diagonal directions of the material layer, the stretchability test described herein is performed. ｘｙ The adhesive bandage according to claim 1, wherein, when measured by [method], the material layer stretches at least 1650% more in the 45° diagonal direction than the same material layer without a material region.

10. When a force of 0.98 N (0.1 kgf) is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein is performed. ｘｙ The adhesive bandage according to claim 1, wherein, when measured by [method], the material layer stretches at least 100% more in the longitudinal or transverse direction than the same material layer without a material region.

11. When a force of 1.96 N (0.2 kgf) is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein is performed. ｘｙ The adhesive bandage according to claim 1, wherein, when measured by [method], the material layer stretches at least 150% more in the longitudinal or transverse direction than the same material layer without a material area.

12. When a force of 2.94 N (0.3 kgf) is applied along at least one of the longitudinal or transverse directions of the material layer, the stretchability test described herein is performed. ｘｙ The adhesive bandage according to claim 1, wherein, when measured by [method], the material layer stretches at least 425% more in the longitudinal or transverse direction than the same material layer without a material area.

13. When a force of 0.98 N (0.1 kgf) is applied along the longitudinal or transverse direction of the other material layer, the stretchability test described herein is performed. ｘｙ The adhesive bandage according to claim 10, wherein, when measured by [method], the material layer stretches at least 75% more in the other longitudinal or transverse direction than the same material layer without a material area.

14. When a force of 1.96 N (0.2 kgf) is applied along the longitudinal or transverse direction of the other material layer, the stretchability test described herein is performed. ｘｙ The adhesive bandage according to claim 11, wherein, when measured by [method], the material layer stretches at least 150% more in the other longitudinal or transverse direction than the same material layer without a material area.

15. When a force of 4.90 N (0.5 kgf) is applied along the z-direction of the material layer, the stretchability test described in this specification ｚ The adhesive plaster according to claim 1, wherein when measured by, the material layer extends at least 1 mm to 8 mm in the z-direction away from the xy-plane of the material layer.

16. The adhesive bandage according to claim 1, wherein the elastomer film is a polyurethane film.

17. The adhesive bandage according to claim 16, wherein the backing layer further comprises a nonwoven fabric.

18. The adhesive bandage according to claim 1, wherein the length l of the curved S-shaped pattern unit is 2.5 to 6 times the width w of the curved S-shaped pattern unit.

Images