TWM523439U - Hydrogel dressing with improved protective film layer - Google Patents

Description

Hydrogel dressing with improved protective film

This creation relates to a hydrogel dressing, in particular a hydrogel dressing having an improved protective film layer.

Hydrogel dressings are widely used wound care medical supplies in recent years. The inner layer of the hydrogel dressing is a substrate having a hydrogel component, which can be used to absorb the exudate generated by the human body when the wound is healed, and the outer layer is an antibacterial waterproof PU film. Compared to conventional dry dressings, this combination allows the wound to be wet and accelerate wound healing.

The detailed structure of the hydrogel dressing can be represented by the new patent No. M376275 of the Republic of China, please refer to Figure 1. The patent discloses a water-absorbing hydrogel dressing patch, the structure design comprising a bottom release film layer 1, an intermediate layer 2 (gas permeable film layer, PU film), a water-absorbing hydrogel layer 3, A first upper release liner layer 4 and a second upper release liner layer 5. The first upper release liner layer 4 is first peeled off and attached over the wound in accordance with an indication of the operational print 6 above the first upper release liner layer 4 and the second upper release liner layer 5. Next, the second upper release paper layer 5 is peeled off along a pair of line 7 at which time a pressure sensitive adhesive layer 8 under the intermediate layer 2 is exposed, which can be used to adhere the water-absorbing hydrogel dressing patch to the skin near the wound. on. The function of the bottom release film layer 1 is to protect the intermediate layer 2 during transportation and packaging, but to remove it during use. Therefore, there is a secant line 9 at the center of the bottom release film layer 1, with secant indications 10 on both sides. The force is applied in the direction of the secant operation instruction 10, and the bottom release film layer 1 can be peeled off.

Such a water-absorbent hydrogel dressing patch is very convenient to be fixed on the skin, but the two-part bottom release film layer 1 may sometimes be difficult to tear due to incomplete cutting, or because the secant 9 is above the wound, the bottom is peeled off. The release film layer 1 touches the wound at the time, causing discomfort to the patient, so the design of the bottom release film layer 1 has a different aspect. An improved structure is disclosed in the Republic of China Application No. 201422259, see Figure 2. The structure of the hydrogel dressing disclosed in the application mainly comprises a first release film layer 11 having a protrusion 11', an elastic film layer 12 (gas permeable film layer, PU film), and adhesion to the elastic film layer 12. A glue layer 13 (pressure-sensitive adhesive layer), a lug 14 and a second release film layer 15. As can be seen from Fig. 2, the biggest difference between the present case and the previous example is that the first release film layer 11 no longer has a central secant line, but the partial portion of the first release film layer 11 and the lug 14 are partially adhered. In a partially separated state, the first release film layer 11 is torn off by the lug 14 being interlocked with the convex portion 11'. In practice, the lugs 14 may not be used in order to save cost.

Such an improved structure can avoid contact between the wound and the user's discomfort. However, it brings another problem. When the lug 14 is peeled off from the skin surface together with the convex portion 11', a portion of the first release film layer 11 connected to the convex portion 11' and bonded to the elastic film layer 12 will have a lower elastic film layer 12 When the part is pulled away from the skin, a part of the adhesive layer 13 is also peeled off; and because the first release film layer 11 is relatively soft and elastic, when the first release film layer 11 is peeled off, the part of the elastic film layer 12 is pulled back. The elastic layer 13 underneath is bonded to each other to form wrinkles and is difficult to remove. These wrinkles left on the hydrogel dressing are not only unsightly, but also easily cause external sewage to penetrate, causing the hydrogel dressing to deteriorate and even invade the wound. The reason for this is that the temporary adhesion between the first release film layer 11 and the elastic film layer 12 is also a thin layer of a low-viscosity coated ketone latex (not shown) under the first release film layer 11, although The adhesiveness is not more viscous than the adhesive layer 13, but since the adhesive layer 13 is not completely adhered to the skin, the adhesive force is insufficient, and the partial elastic film layer 12 is followed by the weakly viscous ketone rubber emulsion.

Since the hydrogel dressing structure similar to that of the publication No. 201422259 has gradually become an application mode, the aforementioned problems must be properly solved.

In order to solve the problem that the hydrogel dressing peels off the protective film layer on the gas permeable film layer, causing the partial gas permeable film layer to be pulled away from the skin surface, the present invention proposes a hydrogel dressing having an improved protective film layer. The hydrogel dressing has at least one bottom release paper layer, a hydrogel layer temporarily adhered to the at least one bottom release paper layer, a gas permeable film having a pressure sensitive adhesive layer adhered to the hydrogel layer a layer, and a protective film layer temporarily adhered to the gas permeable film layer, wherein the gas permeable film layer has a shape similar to a polygon, and the corner is rounded; the protective film layer has an outer shape similar to the rounded polygon. But at least one corner has a convex Out.

According to the present concept, the polygon may be a triangle, a rectangle, a square, a pentagon or a hexagon.

According to the concept of the present invention, the protruding portion may have a line of symmetry which forms a two angles with the polygonal side lines on both sides of the protruding portion, and the angles of the two angles are approximately equal.

According to the concept of the present invention, an indication mark can be drawn on the protruding portion to guide the user to tear off the protective film layer in the direction indicated.

According to the present invention, the direction of the indication should be opposite to the closest rounded corner of the gas permeable membrane layer to the projection.

According to the concept of the present invention, the gas permeable membrane layer can be made of polyurethane (PU), thermoplastic polyurethane (TPU), polytetrafluoroethene (PTFE) or polyethylene (PE). .

According to the concept of the present invention, the protective film layer may be made of polyethylene terephthalate (PET), oriented polypropylene (OPP) or polyethylene (PE), or the protective film layer is Release paper.

By protecting the protruding portion of the film layer at least one corner, when the user tears the protective film layer away from the gas permeable film layer, the part of the gas permeable film layer temporarily adhered thereto is not peeled off from the skin, thereby solving the foregoing problem.

1‧‧‧Bottom release film

2‧‧‧Intermediate

3‧‧‧Water-absorbing hydrogel layer

4‧‧‧First upper release paper layer

5‧‧‧Second upper release paper layer

6‧‧‧Operation printing

7‧‧‧Cut line

8‧‧‧pressure layer

9‧‧‧ secant

10‧‧‧ secant operation instructions

11’‧‧‧ convex

11‧‧‧First release film

12‧‧‧Elastic film

13‧‧‧ glue layer

14‧‧‧ lugs

15‧‧‧Separate release film

100‧‧‧Protective film

110‧‧‧Protruding

111‧‧‧left side line

112‧‧‧right sideline

113‧‧‧symmetric line

114‧‧‧Indication

200‧‧‧ breathable membrane

210‧‧‧Corres

300‧‧‧ hydrogel layer

400‧‧‧Bottom release paper layer

Figure 1 is a schematic view of the structure of a conventional hydrogel dressing.

Figure 2 is a schematic view showing the structure of another conventional hydrogel dressing.

Figure 3 is a schematic view showing the structure of a hydrogel dressing according to the present invention.

Figure 4 is a schematic illustration of one of the protective film layers of the hydrogel dressing.

Figure 5 shows the peeling of the protective film layer.

Figure 6 is another schematic view of the hydrogel dressing protective film layer.

The specific content of this creation is illustrated in conjunction with Figures 3 through 6 of the drawings. As shown in FIG. 3, the present disclosure discloses a hydrogel dressing having an improved protective film layer having a bottom release liner layer 400 and a water temporarily adhered to the two bottom release liner layers 400. a gel layer 300, a gas permeable film layer 200 having a pressure sensitive adhesive layer (not shown) adhered to the hydrogel layer 300 (the pressure sensitive adhesive layer is present directly under the gas permeable film layer 200), and The protective film layer 100 temporarily adhered to the gas permeable film layer 200. The details of the construction and function of each structure are explained below.

The outer shape of the gas permeable membrane layer 200 approximates a polygon, which in this embodiment is approximately a square. Differently, the four corners of the square are rounded to form a rounded corner 210, which is to prevent the sharp portion of the gas permeable film layer 200 from being peeled off due to stress concentration when the pressure sensitive adhesive layer adheres to the human skin. , causing the hydrogel dressing to gradually fall off. In the present embodiment, the aforementioned polygon is a square. In practice, depending on the design of the different wound locations, different shapes can be taken, such as triangles, rectangles, pentagons or hexagons. This creation does not limit multilateralism Shaped shape. In the present embodiment, the gas permeable membrane layer 200 is made of polyurethane (PU). Alternatively, thermoplastic polyurethane (TPU), polytetrafluoroethene (PTFE) or polyethylene (PE) is also an alternative material. The pressure sensitive adhesive used in the pressure sensitive adhesive layer is generally classified into four types: rubber type, acrylic type, silicone type and PU type. There is no limit to the use. However, in order to meet the requirements of the gas permeable and waterproof properties of the gas permeable membrane layer 200, the pressure sensitive adhesive is preferably made of an acrylic or PU material.

The function of the protective film layer 100 is to temporarily protect the gas permeable film layer 200 from being scratched or torn before use, and the outer shape of the protective film layer 100 approximates the polygonal shape with rounded corners. It is best to be able to cut each side to reduce material loss. In this embodiment, the material of the protective film layer 100 is polyethylene terephthalate (PET). Some suitable materials, such as Oriented polypropylene (OPP) or polyethylene (PE), may also be used as the material of the protective film layer 100. For the sake of simple design, the protective film layer 100 can also use a release paper. A corner of the protective film layer 100 is attached with a projection 110 as shown in FIG. The protrusions 110 are used to facilitate the tearing off of the protective film layer 100. In practical applications, there may be more than one protrusion 110, and a plurality of protrusions may exist at the same corners of the polygon.

The projection 110 has a special design, see Figure 4. The shape of the protrusion 110 has a line of symmetry 113, and the line of symmetry 113 forms an angle with the polygonal side of the two sides of the protrusion 110, that is, a θ ₁ angle with a left line 111 and the line of symmetry 113. A right side line 112 and a line of symmetry 113 have a θ ₂ angle, and the angles of the two angles are approximately equal. There are several benefits to this design. First, when the user tears off the protective film layer 100 by the protruding portion 110 (as shown in FIG. 5), the portion of the protective film layer 100 to which the protruding portion 110 is pulled is uniformly applied to the left and right sides. This can not cause the force on one side to be too large, and it is easy to pull up the lower gas permeable film layer 200. In addition, since the direction in which the user applies the force is not perpendicular to each side of the protective film layer 100, the protective film layer 100 can be peeled away from the gas permeable film layer 200 at an angle δ. Tests have shown that when the δ angle is 0 degrees, it is most likely to cause the protective film layer 100 to peel off the skin.

In other embodiments, an indication mark 114 can be drawn over the projection 110 as shown in FIG. The indicator 114 directs the user to tear off the protective film layer 100 in its indicated direction. The aforementioned indication direction should be opposite to the guide fillet on the gas permeable membrane layer 200 that is closest to the projection 110 (as shown in Fig. 5, opposite to the position where the guide fillet 210 is located). In this way, the user can be prevented from being mistaken in the direction of the force application when the hydrogel sheet is used, and the gas permeable film layer 200 is pulled up.

The hydrogel layer 300 can be prepared from a hydrogel-bound substrate, and the creation is not limited to the method, material, shape and size. It should be noted that the hydrogel layer 300 is characterized by the ability to absorb exudates from human skin wounds, to maintain the wound moist, and to isolate external sources of contamination. The material of the bottom release paper layer 400 is not limited, and a release paper which is generally commercially available can be used for bonding to form the release paper layer 400. In addition to being temporarily adhered to the hydrogel layer 300, the release paper layer 400 temporarily adheres to the pressure sensitive adhesive layer on the lower portion of the gas permeable film layer 200. except In addition to protecting the hydrogel layer 300, it also protects the pressure sensitive adhesive layer which will adhere to the human skin in the future, from dust damage and viscosity. Although there are two sheets of the bottom release paper layer 400 shown in Fig. 3, the number is not limited to two. A single piece of bottom release liner layer 400, or more than two bottom release liner layers 400, is also within the scope of this creation as long as it can be effectively removed and facilitated for production.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of protection of this creation is subject to the definition of the scope of the patent application attached.

100‧‧‧Protective film

110‧‧‧Protruding

200‧‧‧ breathable membrane

210‧‧‧Corres

300‧‧‧ hydrogel layer

400‧‧‧Bottom release paper layer

Claims (8)

A hydrogel dressing having an improved protective film layer having at least one bottom release paper layer, a hydrogel layer temporarily adhered to the at least one bottom release paper layer, having a pressure sensitive adhesive layer and adhering to the water a gas permeable film layer on the gel layer, and a protective film layer temporarily adhered to the gas permeable film layer, wherein the gas permeable film layer has a shape similar to a polygon, and the angle is rounded; the protective film layer is similar in appearance. The polygon has a rounded corner, but at least one corner is attached with a protrusion. The hydrogel dressing of claim 1, wherein the polygon is a triangle, a rectangle, a square, a pentagon or a hexagon. The hydrogel dressing of claim 1, wherein the protrusion has a line of symmetry which forms an angle with a polygonal side line on both sides of the protrusion, the angles of the two angles being approximately equal. The hydrogel dressing of claim 1, wherein the protrusion is marked with an indicator to guide the user to tear off the protective film layer in the direction indicated. The hydrogel dressing of claim 4, wherein the direction of indication is opposite to the closest rounded corner of the gas permeable membrane layer to the projection. The hydrogel dressing according to claim 1, wherein the gas permeable membrane layer is composed of polyurethane (PU), thermoplastic polyurethane (TPU), and polytetrafluoroethene (Polytetrafluoroethene). Made of PTFE) or polyethylene (PE). The hydrogel dressing of claim 1, wherein the protective film layer is made of polyethylene terephthalate (PET), Made of oriented polypropylene (OPP) or polyethylene (PE). The hydrogel dressing of claim 1, wherein the protective film layer is a release paper.