A transparent, breathable dressing
Patent Information
- Application Number
- CN202522260875.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-10-27
AI Technical Summary
[0002]透气透明敷料由背衬层、胶贴层、胶带条和离型层组成，适用于留置针、PVC、CVC、PICC、PORT等导管的固定，常规纸背衬透明敷料的胶贴层涂胶为满涂，剥离口在两端，离型层剥离时若离型层与胶层的剥离力偏大会带起PU膜或胶贴层，从而造成产品无法使用；在敷料使用过程中，如炎热环境，水汽集结会造成粘贴不良，易发生卷边，导致粘贴时间降低
[0021]本实用新型的有益效果是，通过将PU膜与离型纸之间的胶贴层的边缘位置设置为间隔涂胶部，减少了胶与离型纸的接触面积，从而减小离型纸与胶层的剥离力，降低透明敷料在临床使用中揭开离型层带起PU膜或胶贴层不良的概率。间隔涂胶部处形成由胶贴层外围向内部延伸的通道，用于供水蒸气通过，提高产品边缘的水蒸气透过率，降低水汽集结，增加粘贴效果，减少卷边问题，增加粘贴时间，降低医护成本。通过设置粘胶层提高PU薄膜与背衬层间的接合力。
Smart Images
Figure CN224864648U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical dressing technology, and in particular to a transparent and breathable dressing. Background Technology
[0002] Breathable and transparent dressings consist of a backing layer, an adhesive layer, adhesive tape, and a release layer. They are suitable for securing catheters such as indwelling needles, PVC, CVC, PICC, and PORT. Conventional paper-backed transparent dressings have a full coating of adhesive on the adhesive layer, with the release vents at both ends. If the peeling force between the release layer and the adhesive layer is too strong during release layer peeling, it can pull up the PU film or adhesive layer, rendering the product unusable. During dressing use, in hot environments, moisture accumulation can cause poor adhesion, leading to edge curling and reduced adhesion time.
[0003] In addition, during the dressing production process, the PU film is sometimes brought up during the half-cutting and waste-edge removal step, resulting in product defects.
[0004] This application is filed to address the aforementioned deficiencies. Utility Model Content
[0005] The purpose of this invention is to provide a transparent and breathable dressing that optimizes the traditional full-coat adhesive application to edge-interval adhesive application, reducing the peel force between the release layer and the adhesive layer, preventing the PU film or adhesive layer from being pulled up during peeling, and improving water vapor permeability.
[0006] To address the aforementioned problems, this utility model provides a transparent and breathable dressing, comprising a backing layer, a PU film, an adhesive layer, and a release paper arranged sequentially. The backing layer has an area exposing the PU film, forming a transparent observation window. The release paper is connected to the PU film via the adhesive layer. The edge of the adhesive layer has intermittent adhesive coating portions to reduce the peeling force required when peeling the release paper. The intermittent adhesive coating portions form channels extending from the outer periphery of the adhesive layer inward. These channels are gaps between adjacent adhesive coating portions and can be straight, curved, or zigzag-shaped, allowing water vapor to pass through.
[0007] The transparent observation window is preferably square and positioned in the center.
[0008] The spaced adhesive section reduces the peeling force required when peeling off the release paper, thereby reducing the probability of the PU film or adhesive layer being pulled off when the release paper is peeled off. The channel is used to allow water vapor to pass through, which increases the water vapor permeability at the product edge, reduces water vapor accumulation, increases the bonding effect, reduces edge curling problems, increases bonding time, and reduces medical care costs.
[0009] According to one embodiment of the present invention, the spacer coating section includes a plurality of corrugated coating areas, and channels are formed between adjacent corrugated coating areas.
[0010] The wavy shape is preferably a water wavy shape.
[0011] Optionally, the spaced adhesive application section includes a plurality of dot-shaped or strip-shaped adhesive application areas.
[0012] Optionally, the middle area of the adhesive layer may also be provided with spaced adhesive application sections.
[0013] Preferably, the central area of the adhesive layer is a fully coated portion to ensure adhesion.
[0014] According to one embodiment of the present invention, an adhesive layer is provided between the backing layer and the PU film. The adhesive layer is used to connect the backing layer and the PU film, thereby improving the bonding force between the PU film and the backing layer. The adhesive layer is preferably low in adhesive. The presence of the adhesive layer can also repair the slight lifting of the film by the semi-cut waste edge during the processing.
[0015] According to one embodiment of the present invention, the transparent and breathable dressing also includes adhesive tape strips, which, when torn off, are used to assist in the fixation of needles or catheters.
[0016] According to one embodiment of the present invention, the adhesive tape strip is adhered to the backing layer.
[0017] According to one embodiment of the present invention, the area of the release paper is larger than the area of the adhesive layer, and the portion of the release paper not connected to the adhesive layer forms a peel handle. Preferably, the peel handle is provided at both ends of the release paper.
[0018] According to one embodiment of the present invention, the width of the channel is 0.5~1.5mm.
[0019] According to one embodiment of the present invention, the thickness of the PU film is 20~25um.
[0020] According to one embodiment of the present invention, the basis weight of the adhesive layer is 20~35g / m². 2 The basis weight of the adhesive layer is 15~30 g / m³. 2 .
[0021] The beneficial effects of this invention are as follows: by setting the edge of the adhesive layer between the PU film and the release paper as an intermittent adhesive coating section, the contact area between the adhesive and the release paper is reduced, thereby reducing the peel force between the release paper and the adhesive layer. This lowers the probability of the transparent dressing peeling off the release layer and causing defects in the PU film or adhesive layer during clinical use. The intermittent adhesive coating section forms a channel extending from the outer periphery of the adhesive layer inwards, allowing water vapor to pass through, increasing the water vapor permeability at the product edge, reducing water vapor accumulation, improving adhesion, reducing edge curling, increasing adhesion time, and reducing medical costs. The adhesive layer also enhances the bonding strength between the PU film and the backing layer. Attached Figure Description
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] Figure 1 This is a schematic diagram of the overall structure of a transparent and breathable dressing;
[0024] Figure 2 A schematic diagram of the layered structure of a transparent and breathable dressing;
[0025] In the diagram: 1. Adhesive tape strip; 2. Backing layer; 3. Adhesive layer; 4. PU film; 5. Adhesive layer; 6. Release paper. Detailed Implementation
[0026] The following description is only intended to disclose the present invention so that those skilled in the art can implement it. The embodiments in the following description are merely examples, and those skilled in the art will conceive of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.
[0027] A transparent and breathable dressing, such as Figure 1 , Figure 2 It includes a backing layer 2, an adhesive layer 3, a PU film 4, an adhesive layer 5, and a release paper 6 arranged in sequence.
[0028] Adhesive strip 1 is attached to backing layer 2 and can be removed to help secure needles or catheters.
[0029] The backing layer 2 can be glassine release paper, CCK release paper, etc., the adhesive layer 5 can be acrylic pressure-sensitive adhesive, etc., and the tape strip 1 can be non-woven fabric coated material.
[0030] The backing layer 2 has an area that exposes the PU film 4, forming a transparent observation window. The transparent observation window is preferably square and arranged in the middle.
[0031] The adhesive layer 3 is preferably made of low-tack adhesive. The low-tack adhesive is applied to the non-release surface of the backing layer 2 (glassine release paper or CCK release paper, etc.). The thickness of the adhesive layer is controlled by a doctor blade, and the layer is dried in an oven to form a backing layer with low-tack adhesive. The low-tack adhesive basis weight is preferably 15-30 g / m². 2 .
[0032] The preferred thickness of the PU film is 20~25um. During production, PU resin is coated on the backing layer 2, and the film thickness is controlled by a scraper. The film is dried in an oven to form a PU film that is then laminated with the low-tack backing layer. The adhesive layer 3 is used to connect the backing layer 2 and the PU film 4, improving the bonding force between the PU film and the backing layer 2. The presence of the adhesive layer 3 can also repair the film that is slightly lifted by the half-cut waste edge during the processing.
[0033] Release paper 6 is connected to PU film 4 through adhesive layer 5. The edge of adhesive layer 5 is provided with intermittent adhesive coating to reduce the peeling force required when releasing paper 6 is peeled off. The intermittent adhesive coating forms a channel extending from the outer periphery of adhesive layer 5 to the inside, for water vapor to pass through.
[0034] Adhesive layer 5 is applied to the release surface of release paper 6. The weight of the adhesive layer is controlled by a squeegee, and the desired adhesive texture is created by the reciprocating motion of a toothed scraper. A spacing of 0.5~1.5mm is preferred. The adhesive layer is dried in an oven to ensure a dry adhesive layer weight of 20~35g / m². 2 The dried adhesive layer is then laminated with the PU film.
[0035] The setting of the spaced adhesive section reduces the peeling force required when peeling off the release paper 6, thereby reducing the probability of the PU film 4 being pulled up when peeling off the release paper 6. The channel is used to allow water vapor to pass through, which improves the water vapor permeability of the product edge, reduces water vapor accumulation, increases the bonding effect, reduces edge curling problems, increases bonding time, and reduces medical care costs.
[0036] The spacer coating section includes several corrugated coating areas, and channels are formed between adjacent corrugated coating areas. The corrugation is preferably water ripple.
[0037] In other embodiments, the spaced adhesive application portion includes a plurality of dot-shaped or strip-shaped adhesive application areas.
[0038] The central area of adhesive layer 5 is fully coated with adhesive to ensure adhesion.
[0039] The main inventive point of this solution lies in the structural design of the adhesive layer 5, which retains full coating in the middle without changing the product's ability to fix the conduit, and applies intermittent coating at the edges to reduce the peeling force between the adhesive layer and the release layer, thereby reducing defects such as film lifting during peeling.
[0040] The area of the release paper 6 is larger than the area of the adhesive layer 5. The part of the release paper 6 that is not connected to the adhesive layer 5 forms a peel handle. Preferably, the peel handle is provided at both ends of the release paper 6.
[0041] Table 1 compares the interlayer peel strength between the adhesive layer and the release layer:
[0042]
[0043] Edge spacing coating improves water vapor permeability and enhances adhesion. Water vapor permeability comparisons are shown in Table 2:
[0044]
[0045] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention can have any variations and modifications.
Claims
1. A transparent and breathable dressing, characterized in that: The device includes a backing layer (2), a PU film (4), an adhesive layer (5), and a release paper (6) arranged in sequence. The backing layer (2) has an area that exposes the PU film (4), forming a transparent observation window. The release paper (6) is connected to the PU film (4) through the adhesive layer (5). The edge of the adhesive layer (5) has an intermittent adhesive coating to reduce the peeling force required when peeling the release paper (6). The intermittent adhesive coating forms a channel extending from the outer periphery of the adhesive layer (5) to the inside, which is used for water vapor to pass through.
2. The transparent and breathable dressing according to claim 1, characterized in that: The spacer coating section includes several corrugated coating areas, and channels are formed between adjacent corrugated coating areas.
3. The transparent and breathable dressing according to claim 1 or 2, characterized in that: The central area of the adhesive layer (5) is a fully coated adhesive area.
4. The transparent and breathable dressing according to claim 1, characterized in that: An adhesive layer (3) is provided between the backing layer (2) and the PU film (4), and the adhesive layer (3) is used to connect the backing layer (2) and the PU film (4).
5. The transparent and breathable dressing according to claim 1, characterized in that: Transparent and breathable dressings also include adhesive tape strips (1).
6. The transparent and breathable dressing according to claim 5, characterized in that: The tape strip (1) is attached to the backing layer (2).
7. The transparent and breathable dressing according to claim 1 or 4, characterized in that: The area of the release paper (6) is larger than the area of the adhesive layer (5), and the portion of the release paper (6) not connected to the adhesive layer (5) forms a peel handle.
8. The transparent and breathable dressing according to claim 1 or 2, characterized in that: The width of the channel is 0.5~1.5mm.
9. The transparent and breathable dressing according to claim 1, characterized in that: The thickness of the PU film (4) is 20~25um.
10. The transparent and breathable dressing according to claim 4, characterized in that: The basis weight of the adhesive layer (5) is 20~35g / m². 2 The basis weight of the adhesive layer (3) is 15~30 g / m. 2 .