A stiffened ePTFE membrane composite patch with an anti-counterfeit trademark

Abstract

The utility model discloses a stiff ePTFE film composite patch with anti -fake trademark, and the patch includes the carrier, the adhesive rubber ring and the stiff composite material layer that stack in proper order, and the stiff composite material layer is fixed on the carrier through the rubber ring, and the stiff composite material layer includes: first microporous membrane layer, second microporous membrane layer and anti -fake trademark pattern, and the anti -fake trademark pattern is formed on any surface of the first microporous membrane layer or second microporous membrane layer, and is embedded between the first microporous membrane layer and second microporous membrane layer through hot -pressing composite, and the application field of the composite patch includes automobile electrical and electronic equipment, logistics package, consumer electronic product, medical storage and transportation or chemical fluid conveying. Through the above -mentioned way, the utility model has improved the overall stiffness and form stability of patch, and simultaneously realizes the comprehensive performance of structure stiffening not easy to deform, trademark lasting clear and not easy to counterfeit, thereby improving product reliability and enhancing brand protection ability.

Description

Technical Field

[0001] This utility model relates to the field of polymer materials, and in particular to a rigid ePTFE film composite patch with anti-counterfeiting trademarks suitable for automotive electrical and electronic equipment, logistics packaging, consumer electronics, pharmaceutical storage and transportation, or chemical fluid transportation. Background Technology

[0002] Expanded polytetrafluoroethylene (ePTFE) membranes have attracted much attention due to their microporous network structure formed by a stretching process. This structure allows them to effectively trap particulate matter, bacteria, and other impurities while maintaining high air permeability, achieving a good balance between filtration and air permeability. Furthermore, ePTFE membranes possess excellent chemical stability and wide temperature range tolerance (-80℃ to 260℃), making them widely applicable in fields such as medical filtration, industrial protection, and breathable components for electronic devices.

[0003] However, when used in patch products, traditional ePTFE membrane materials reveal two major technical shortcomings: First, because the material itself is soft and easily deformed, the patches made from it are prone to collapse, wrinkling or stretching during use, resulting in a decrease in the flatness of the appearance, poor assembly and bonding, and affecting the overall structural rigidity and service life.

[0004] Secondly, most existing ePTFE patches use direct surface printing of trademarks. These trademarks are exposed to the external environment and are easily worn, blurred, or even detached due to friction, chemical corrosion, or ultraviolet radiation, making it difficult to maintain clear visibility throughout the product's lifecycle. This not only weakens brand recognition and anti-counterfeiting capabilities but also fails to meet the increasingly stringent requirements for product traceability and anti-counterfeiting protection in the automotive, consumer electronics, and high-end logistics industries. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a rigid ePTFE film composite patch with anti-counterfeiting trademark, which can simultaneously achieve the comprehensive performance of rigid structure that is not easily deformed and durable and clear trademark that is not easy to counterfeit, thereby improving product reliability and enhancing brand protection capabilities.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: providing a rigid ePTFE film composite patch with an anti-counterfeiting trademark, comprising the following parts stacked in sequence: carrier; An adhesive ring is disposed on the surface of the carrier. And a rigid composite material layer, which is fixed to at least one surface of the carrier by the rubber ring; The rigid composite material layer includes: a first microporous membrane layer, a second microporous membrane layer, and an anti-counterfeiting trademark pattern. The second microporous membrane layer is an ePTFE expanded polytetrafluoroethylene membrane. The anti-counterfeiting trademark pattern is formed on either the first microporous membrane layer or the second microporous membrane layer and is embedded between the first microporous membrane layer and the second microporous membrane layer by hot pressing.

[0007] In a preferred embodiment of the present invention, the first microporous membrane layer includes any one or more combinations of ePTFE membrane, PE microporous membrane, PP microporous membrane, polyimide film, PEEK microporous membrane, PVC microporous membrane and PFA microporous membrane.

[0008] In a preferred embodiment of the present invention, the first microporous membrane layer has a thickness of 10-200 micrometers and an average pore size of 0.01-50 micrometers.

[0009] In a preferred embodiment of the present invention, a transparent adhesive layer is provided between the first microporous membrane layer and the second microporous membrane layer, and the two microporous membrane layers are bonded together and then hot-pressed together.

[0010] In a preferred embodiment of this utility model, the carrier is a PE film carrier tape, and the adhesive ring is a ring structure die-cut from the double-sided pressure-sensitive adhesive tape.

[0011] In a preferred embodiment of this utility model, the rigid composite material layer is die-cut into a circular or square shape on the carrier.

[0012] The beneficial effects of this utility model are: the rigid ePTFE membrane composite patch provided by this utility model significantly improves the overall rigidity and shape stability of the patch through its unique double-layer microporous membrane composite structure, so that it remains flat and firm during handling, installation and use, effectively overcoming the defects of traditional ePTFE patches that are prone to softening and wrinkling, and improving assembly reliability and appearance quality.

[0013] The embedded anti-counterfeiting trademark design places the trademark pattern between two layers of film, isolating it from the external environment. This ensures that the trademark remains clear, wear-resistant, and does not fall off throughout the entire product lifecycle, providing a lasting guarantee for brand recognition and anti-counterfeiting traceability.

[0014] Through a precise and controllable composite process, by optimizing the hot pressing temperature and adhesive application parameters, the interlayer bonding is ensured while the microporous breathability of the material is fully preserved. This allows the patch to have excellent mechanical properties without affecting its original filtration and pressure balancing capabilities.

[0015] This patch structure design facilitates die-cutting and carrier tape packaging, is suitable for automated placement, and can be widely used in breathable, anti-counterfeiting, and protective scenarios in fields such as automotive electronics, consumer electronics, and pharmaceutical packaging. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of a preferred embodiment of the rigid ePTFE film composite patch with anti-counterfeiting trademark of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be noted that the terms "front," "rear," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] Please see Figure 1 This utility model provides an ePTFE membrane composite patch that combines excellent morphological stability, durable anti-counterfeiting function, and breathable filtration performance, comprising the following parts stacked in sequence: Carrier 5; An adhesive ring 4 is disposed on the surface of the carrier 5; And a rigid composite material layer, which is fixed to at least one surface of the carrier 5 by the rubber ring 4; The rigid composite material layer includes: a first microporous membrane layer 1, a second microporous membrane layer 2, and an anti-counterfeiting trademark pattern 3. The second microporous membrane layer 2 is an ePTFE expanded polytetrafluoroethylene membrane. The anti-counterfeiting trademark pattern 3 is formed on either the first microporous membrane layer 1 or the second microporous membrane layer 2 and is embedded between the first microporous membrane layer 1 and the second microporous membrane layer 2 by hot pressing.

[0024] The rigid composite material layer is the core function, including: a first microporous membrane layer 1, which is a transparent thin film with a thickness of 10~200 micrometers and an average pore size of 0.01~50 micrometers and has a microporous structure.

[0025] Specific materials can be selected from any one or more combinations of ePTFE membrane, PE microporous membrane, PP microporous membrane, polyimide film, PEEK microporous membrane, PVC microporous membrane, and PFA microporous membrane. PE microporous membrane is preferred to balance mechanical strength and processing performance. By selecting a first microporous membrane with a certain rigidity and thickness to composite with the ePTFE membrane, it is as if a "skeleton" is added to the flexible ePTFE membrane, significantly improving the overall stiffness and tensile strength of the composite material. This allows the final patch to remain flat and stiff during handling, installation, and long-term use, without collapse or wrinkles, greatly improving the product's appearance quality and assembly reliability.

[0026] The second microporous membrane layer 2 is made of expanded polytetrafluoroethylene (ePTFE) membrane, which has a uniform microporous structure with a pore size of 0.1~50 micrometers. The ePTFE membrane is formed by a stretching process, which can effectively trap impurities such as particulate matter and bacteria, while allowing gas or liquid molecules to pass through, thus achieving a balance between high-efficiency filtration and air permeability.

[0027] The anti-counterfeiting trademark pattern 3 forms an indentation on the surface of the first or second microporous membrane layer through printing or mold rolling, and has the anti-counterfeiting feature of being easily destroyed when peeled off.

[0028] The anti-counterfeiting trademark pattern 3 can include text, graphics, or codes, and integrates magnetic ink, holographic laser technology, or visual hiding technology to achieve unique anti-counterfeiting verification. The pattern has a "peel-off" characteristic, meaning that the anti-counterfeiting information separates and remains when the label is peeled off, ensuring that it cannot be reused. The trademark pattern is completely isolated from the external environment (such as ultraviolet rays, friction, and chemical solvents), ensuring that the trademark is clear, wear-resistant, and does not fall off throughout the entire product life cycle, achieving permanent brand identification and anti-counterfeiting, effectively enhancing the product's commercial value and anti-counterfeiting level.

[0029] An optional transparent adhesive layer is applied to the surface of the unmarked film layer. Through a hot-pressing process, the two microporous film layers are firmly bonded together, embedding the anti-counterfeiting trademark pattern in the middle and forming a rigid composite structure. The choice of adhesive ensures that it does not affect the material's breathability and transparency.

[0030] Optional reinforcement layer: To further improve mechanical properties, the composite material can also be combined with fabrics or other polymer materials to enhance its resistance to collapse and durability, making it suitable for high-pressure or complex working conditions.

[0031] The carrier 5 is a PE film carrier tape, and the adhesive ring 4 is a ring structure die-cut from the double-sided pressure-sensitive adhesive tape. The die-cut shape of the rigid composite material layer on the carrier 5 is circular or square.

[0032] This carrier tape structure design makes it extremely convenient to use automated equipment (such as pick-and-place machines) for high-speed, precise pick-and-place and mounting, making it particularly suitable for the large-scale production needs of modern electronics, automotive and other industries, and greatly improving the production efficiency of downstream customers.

[0033] This utility model also relates to a method for preparing a rigid ePTFE film composite patch with an anti-counterfeiting trademark, comprising the following steps: (I) Preparation of composite materials: S1. Provide a first microporous membrane 1 and a second microporous membrane 2 respectively for surface cleaning and tension control to ensure flatness; the second microporous membrane 2 is an ePTFE membrane. S2. An anti-counterfeiting trademark pattern 3 is formed on the surface of any microporous membrane. This pattern can be achieved in two ways: Printing method: Printing is performed using aging-resistant inks.

[0034] Indentation method: Using a mold engraved with the trademark pattern, indentations with a three-dimensional effect are rolled onto the film surface.

[0035] S3. Lay the two surfaces, each with the anti-counterfeiting trademark pattern and coated with transparent adhesive, together and hot-press them at 120~180℃, pressure 0.5~2.0MPa, for 1~5 minutes. Hot-pressing can be achieved using laser welding or traditional hot pressing. Precise temperature control and pressure application ensure a strong bond between the two membranes, forming a high-rigidity composite material, while preventing excessive temperature or clogging of the micropores by the adhesive, thus perfectly preserving the ePTFE membrane's breathable filtration function. Simultaneously, the trademark is permanently sealed between the two membranes, achieving optimal protection.

[0036] (ii) Surface mount assembly: S4. Provide a carrier film made of PE material, and die-cut double-sided pressure-sensitive tape into ring-shaped adhesive rings, and accurately transfer and attach them to the carrier film to form a structured carrier tape.

[0037] S5. The rigid composite material is stacked on the carrier tape, with the second microporous membrane 2 facing the pressure-sensitive rubber ring 4; then, using the positioning holes on both sides of the carrier tape as a reference, the composite material is die-cut using a mold to divide it into individual patches of the designed shape (such as circles or squares).

[0038] S6. Die-cut the rigid composite material onto the surface of the carrier membrane, and after waste removal, obtain the finished patch assembly.

[0039] After die-cutting, only the composite material in the patch area is bonded to the carrier tape via an adhesive ring, while the surrounding waste is peeled off, forming independent and neat patch assemblies. This carrier tape design is extremely suitable for high-speed loading and unloading in reel packaging and automated patching equipment.

[0040] The composite patch prepared by the method of this invention successfully integrates structural rigidity, durable anti-counterfeiting and functional breathability, meeting the stringent performance and reliability requirements of high-end application scenarios.

[0041] The core of this invention lies in the double-layer microporous membrane composite structure used in the composite patch. Through precise processing, the patch firmly bonds the first microporous membrane layer 1 (preferably a PE microporous membrane) to the second microporous membrane layer 2 (ePTFE membrane), and permanently encapsulates the anti-counterfeiting trademark pattern 3 between the two membrane layers.

[0042] The ePTFE membrane, which is the core of the function, retains its microporous network structure (pore size 0.1~50 micrometers) formed by the stretching process. This allows the patch to have both high porosity (70%~90%) and low flow resistance. It can effectively trap particulate matter and bacteria while ensuring the smooth passage of gas or liquid molecules, thus achieving a balance between breathability and filtration.

[0043] The lamination process of the patch is crucial. By applying a dot-coated transparent adhesive and then hot-pressing the lamination, the two layers of film are firmly bonded, the overall rigidity of the patch is significantly improved, and the collapse and deformation during use are prevented. At the same time, the blockage of the microporous network is effectively prevented, ensuring the realization of core functions.

[0044] The built-in anti-counterfeiting trademark can be formed through mold rolling or printing processes, and can be combined with magnetic ink or holographic laser technology to integrate multiple anti-counterfeiting verification functions for the patch.

[0045] The superior properties of the composite patch of this invention directly support its cross-domain applications: In the automotive and consumer electronics sectors, the rigidity of surface mount technology (SMT) ensures smooth attachment and long-term shape stability on precision components, while its durable embedded anti-counterfeiting trademarks provide strong protection for brand security.

[0046] In the fields of pharmaceutical storage and transportation and chemical fluid transport, patches utilize the chemical inertness (resistance to strong acids and alkalis) of ePTFE membranes to achieve air permeability and pressure balance in containers for storing and transporting corrosive media, while also enabling particulate filtration in sterile environments. In the field of high-end logistics packaging, this patch can be used as a disposable tamper-evident seal label. Its robust composite structure and built-in anti-counterfeiting information can effectively warn and record unauthorized opening behavior.

[0047] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rigid ePTFE film composite patch with an anti-counterfeiting trademark, characterized in that, Including the following components stacked sequentially: carrier; An adhesive ring is disposed on the surface of the carrier. And a rigid composite material layer, which is fixed to at least one surface of the carrier by the rubber ring; The rigid composite material layer includes: a first microporous membrane layer, a second microporous membrane layer, and an anti-counterfeiting trademark pattern, wherein the second microporous membrane layer is an ePTFE expanded polytetrafluoroethylene membrane; The anti-counterfeiting trademark pattern is formed on either the first microporous membrane layer or the second microporous membrane layer, and is embedded between the first microporous membrane layer and the second microporous membrane layer by hot pressing.

2. The rigid ePTFE film composite patch with anti-counterfeiting trademark according to claim 1, characterized in that, The first microporous membrane layer comprises any one or more combinations of ePTFE membrane, PE microporous membrane, PP microporous membrane, polyimide film, PEEK microporous membrane, PVC microporous membrane and PFA microporous membrane.

3. The rigid ePTFE film composite patch with anti-counterfeiting trademark according to claim 1, characterized in that, The first microporous membrane layer has a thickness of 10~200 micrometers and an average pore size of 0.01~50 micrometers.

4. The rigid ePTFE film composite patch with anti-counterfeiting trademark according to claim 1, characterized in that, A transparent adhesive layer is provided between the first microporous membrane layer and the second microporous membrane layer, and the two microporous membrane layers are bonded together by hot pressing.

5. The rigid ePTFE film composite patch with anti-counterfeiting trademark according to claim 1, characterized in that, The carrier is a PE film carrier tape, and the adhesive ring is a ring structure die-cut from the double-sided pressure-sensitive adhesive tape.

6. The rigid ePTFE film composite patch with anti-counterfeiting trademark according to claim 1, characterized in that, The rigid composite material layer is die-cut into a circular or square shape on the carrier.

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