Pattern printing diaphragm for dental appliance and manufacturing method thereof

Abstract

The invention relates to the technical field of dental materials, in particular to a pattern printing diaphragm for a dental appliance and a manufacturing method of the pattern printing diaphragm. The diaphragm comprises at least two thermoplastic polymer layers, and polymer materials are selected from various thermoplastic materials or blending modifiers of the thermoplastic materials. And at least one pattern layer sandwiched between adjacent polymer layers, the pattern layer having an entity thickness of 5 [mu] m to 150 [mu] m and made of a curable pattern material, forming a three-dimensional pattern structure after curing, and forming a chemical bonding interface with the upper and lower polymer layers, thereby forming the packaged sandwich structure. The invention also provides a manufacturing method, which adopts the steps of pattern preforming, curing treatment, pulse hot-pressing compounding and the like, so that the film can obtain the embedded pattern with a stable interface and an integrated structure. The diaphragm has good bonding strength, biological suitability and pattern definition, and is suitable for personalized dental orthodontic application.

Description

Technical Field

[0001] The present invention relates to the technical field of oral medical materials and manufacturing processes, and in particular to a pattern-printed membrane for use in dental appliances and a method for manufacturing the same. The membrane is suitable for the personalized manufacture of shell-shaped dental appliances. The membrane features an internally encapsulated pattern structure, enabling long-term, stable display of the pattern while maintaining material transparency and mechanical properties, and supporting the integration of functional pattern information. The invention relates to the structural modification and interface forming processes of thermoplastic moldable membrane materials for orthodontic appliances. Background Art

[0002] With the rapid development of invisible orthodontic technology, shell-shaped dental appliances, owing to their aesthetics and comfort, have become a mainstream alternative to traditional bracket-based appliances. These appliances are typically manufactured by heating a thermoplastic polymer membrane (such as thermoplastic polyurethane (TPU) or polyethylene terephthalate (PETG)) and then forming it onto a dental mold using vacuum or pressure molding. To enhance management, medical records, or personalized aesthetics, some products feature printed patterns on the membrane, such as treatment stage numbers, bite guides, and brand logos.

[0003] However, existing membrane products still face a number of technical bottlenecks in pattern printing and structural integration, mainly reflected in the following aspects: First, the durability and biosafety issues of surface printing methods are prominent. The pattern is usually directly exposed on the outer surface of the membrane and is susceptible to mechanical friction during daily use such as wearing, cleaning, and disassembly, resulting in blurred patterns and loss of pattern, which is not conducive to long-term information recognition. At the same time, some ink systems contain components such as unpolymerized monomers and heavy metal pigments, which may dissolve under the long-term action of saliva. Long-term contact with the oral mucosa poses a biocompatibility risk and does not meet the current standards for wear resistance and migration limit values ​​for medical device materials.

[0004] Second, existing multilayer film structures mostly rely on adhesives to achieve pattern encapsulation, which has limited interfacial stability and optical performance. Commonly used adhesives, such as ethylene-vinyl acetate (EVA), cannot withstand the high temperatures and pressures of the blister process, and are prone to delamination or bubble inclusion, which in turn affects the overall strength and appearance of the film. Furthermore, the refractive index mismatch between the adhesive and the substrate reduces the film's light transmittance, hindering visual observation by dentists during clinical practice.

[0005] Third, traditional printed patterns are primarily static graphics or numbers, lacking interaction with the oral environment and making personalized medical support difficult. For example, they cannot respond to changes in oral temperature, pH, or bite pressure to provide feedback such as wear progress and cleaning reminders. Furthermore, precise alignment between the pattern and the three-dimensional dental model is difficult, and after vacuum molding, the pattern is prone to positional shifting or deformation, with errors potentially reaching ±0.5mm, affecting actual recognition results.

[0006] Fourth, the current pattern integration and membrane preparation process is mainly "single-layer printing + post-lamination", which is not only complicated and time-consuming, but also difficult to adapt to high-speed continuous roll production equipment, limiting the efficiency and yield of industrial-scale preparation.

[0007] Therefore, the existing pattern-printed films used for dental shell-shaped appliances still have obvious deficiencies in pattern stability, interface structure, functional response and manufacturing efficiency. There is an urgent need for a multi-layer film solution with embedded pattern structure, firm packaging, environmental responsiveness and adaptability to continuous manufacturing processes to meet the clinical and production requirements of the next generation of orthodontic materials. Summary of the Invention

[0008] The present invention aims to provide a pattern-printed film for dental appliances and its manufacturing method, aiming to address the shortcomings of existing films in terms of pattern durability, biocompatibility, structural stability, and personalized functional integration. By introducing a curable pattern material with interfacial bonding capabilities and optimizing the pattern packaging structure and interfacial fusion process, the pattern achieves structural embedding, high stability, and functional expansion, adapting to the clinical needs and large-scale production conditions of orthodontic applications.

[0009] In one possible embodiment, a pattern-printed membrane for manufacturing a shell-shaped dental appliance is provided, comprising: at least two thermoplastic polymer layers, the material of the thermoplastic polymer layers being selected from one of the following or a combination thereof: thermoplastic polyurethane, polyethylene terephthalate, polyhexamethylene terephthalate, polyamide, polyethylene, polycarbonate, polymethyl methacrylate, ethylene-vinyl acetate copolymer, polyethersulfone or a blended modified product thereof; and at least one pattern layer, the pattern layer being sandwiched between any two adjacent thermoplastic polymer layers, having a physical thickness of 5 μm to 150 μm, and comprising a type of curable pattern material, which forms a spatial three-dimensional pattern structure after curing, and forms chemical bonding interfaces with adjacent thermoplastic polymer layers at the upper and lower interfaces, respectively, to form an encapsulated sandwich structure, wherein the pattern is an embedded three-dimensional pattern in the final structure of the membrane and can be clearly identified through the outer polymer layer.

[0010] In one possible embodiment, the pattern material is a photocurable composition comprising: a monomer or oligomer having a vinyl or allyl structure; an optional diluting comonomer or reactive diluent; and a photosensitive component having photoinitiating ability, capable of inducing free radical or cationic polymerization reactions under ultraviolet light irradiation; wherein the viscosity of the composition at 30°C is 10 to 3000 mPa·s, the mass percentage of the main reaction monomer accounts for 5% to 70% of the reactive system, and the reactive monomer has interfacial bond compatibility with the thermoplastic polymer layer in terms of structure or group.

[0011] In one possible embodiment, the composition includes reactive structural units that are compatible with the thermoplastic polymer layer, and the structural units include vinyl, allyl, aromatic vinyl or amide groups, which are used to undergo bonding reactions with residual functional groups or copolymer segments in the polymer layer during the polymerization and curing process, thereby forming a copolymer or cross-linked network in the interface area.

[0012] In one possible embodiment, the molar ratio of the vinyl unsaturated groups contained in the monofunctional monomer and the multifunctional monomer in the pattern material is not less than 10:1, and their mass percentages in the composition are not less than 25%.

[0013] In one possible embodiment, the film includes three or more thermoplastic polymer layers, each pattern layer is sandwiched between two adjacent polymer layers, and the three-dimensional patterns formed by each pattern layer are independent of each other to form a three-dimensional or sequential pattern structure.

[0014] In one possible embodiment, the pattern layer contains at least one functional pattern unit, and the functional pattern unit includes one of the following or a combination thereof: a photochromic pattern for reflecting the progress of correction, a fluorescent particle pattern that can be developed by X-rays, and a pH-sensitive color-changing pattern that responds to changes in oral pH.

[0015] In one possible embodiment, a method for manufacturing a pattern-printed film is provided, comprising the following steps: (1) providing a first thermoplastic polymer layer, wherein the polymer is selected from any of the above-mentioned materials; (2) forming a pattern layer on the inner surface of the polymer layer, wherein the pattern layer is composed of a type of curable pattern material, has the ability to be converted into a solid state under subsequent treatment, and forms an interface bond with the thermoplastic polymer layer; (3) curing the pattern layer to convert it into a solid pattern with a three-dimensional solid thickness, and forms a preliminary bonding interface with the surface of the first thermoplastic polymer layer; (4) aligning and overlapping a second thermoplastic polymer layer with the pattern layer, placing the second thermoplastic polymer layer in a mold, heating the layer to 70% to 90% of the melting temperature (Tm) of the thermoplastic polymer material, and applying pulsed pressure to chemically bond the pattern layer to the interface of the second polymer layer; and (5) cooling and shaping the layer to obtain an integrated structure in which the pattern is encapsulated in the middle of the film.

[0016] In one possible embodiment, the pattern curing process in step (3) is ultraviolet light irradiation scanning, the wavelength of which is between 300 nm and 405 nm, and the irradiation intensity is 50 to 200 mW / cm².

[0017] In one possible embodiment, the heating treatment in step (4) lasts for 10 to 60 seconds, the peak value of the pulse pressure is 3 to 10 MPa, the frequency is 1 to 5 Hz, the direction of the pulse pressure is perpendicular to the laminate plane, and the single holding time is 0.5 to 3 seconds.

[0018] Based on the above technical solution, the multi-layer pattern-printed membrane for dental shell-shaped orthodontic appliances provided by the present invention achieves integrated interface bonding between the pattern structure and the membrane structure by embedding the pattern structure between thermoplastic polymer layers and using a curable pattern material with complementary chemical structures. Compared with traditional surface printing or bonding composite methods, the membrane has better pattern durability, biosafety and optical clarity, and supports the integrated expression of functional patterns, thereby improving the clinical interaction ability and customization level of the orthodontic appliance. At the same time, the manufacturing method avoids the use of additional adhesives, is compatible with thermoplastic molding and continuous roll-to-roll processes, and has good industrial feasibility and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1Schematic diagram of the structure of the pattern printed film according to an embodiment of the present invention.

[0021] Figure 2 It is an enlarged view of the interface structure between the pattern layer and the thermoplastic polymer layer according to an embodiment of the present invention.

[0022] Figure 3 It is a process flow chart of the pattern layer forming and curing steps in the manufacturing method of the present invention.

[0023] Figure 4 It is a schematic diagram of the hot pressing fusion step in the manufacturing method of the present invention.

[0024] Figure 5 Schematic diagram of the layered structure of a diaphragm including a multi-patterned layer structure. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following describes the implementation methods of the present application through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0026] It should be noted that various aspects of the embodiments within the scope of protection of the present invention are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice method. In addition, other structures and / or functionality other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0027] The following is a further description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the following embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] like Figure 1As shown, an embodiment of the present invention provides a pattern-printed film for manufacturing a shell-shaped dental appliance, which is a multi-layer composite structure including: a first thermoplastic polymer layer 101, a pattern layer 102, and a second thermoplastic polymer layer 103. The pattern layer 102 is sandwiched between the two polymer layers to form a typical sandwich structure.

[0029] Materials for the first thermoplastic polymer layer 101 and the second thermoplastic polymer layer 103 can include thermoplastic polyurethane (TPU), modified polyethylene terephthalate glycol (PETG), poly(crystal-co-polyester) (PCTG), polycarbonate (PC), and the like. Thickness can range from 0.1 to 1.5 mm to meet clinical requirements for strength, flexibility, and transparency. These materials exhibit excellent biocompatibility and wear resistance, making them suitable for long-term contact with the oral mucosa.

[0030] The pattern layer 102 is made of a curable pattern material and may include functional pattern units 21 to 24, such as a photochromic pattern for indicating wear progress, an X-ray-developable particle pattern for precise appliance positioning, and a pH-sensitive color-changing pattern for monitoring oral health. The material of the pattern layer is complementary to the upper and lower polymer layers in terms of backbone structure or reactive groups. Heating or UV irradiation allows for the formation of a chemical bond structure 104 between the layers, achieving a high interfacial bonding strength, typically no less than 5 N / cm.

[0031] like Figure 2 The interface structure is further magnified in the figure. The main chain of the first polymer layer 201 can be the [-NH-CO-O-] structure found in TPU, containing reactive groups 202 (such as -NCO and -OH). The main chain of the pattern layer 205, if an acrylate oligomer, can contain reactive groups 204 (such as -NH2 and -C=C-). These groups form bonds with the polymer through covalent or hydrogen bonds 203, thereby forming a microscopic interpenetrating network structure and improving adhesion.

[0032] In a specific embodiment, tests show that the interfacial peel strength of the membrane prepared by the above method can reach 8.7 MPa, which is significantly higher than that of the traditional membrane with an adhesive layer composite structure (usually 2~3 MPa), indicating that the solution of the present invention has significant structural stability advantages in clinical and practical applications.

[0033] In another embodiment, Figure 3As shown, the pattern-printed film can be realized through a specific manufacturing process, including the following steps: first, in the raw material processing stage, the surface of the first polymer layer 101 is activated to make it have better printing adhesion; then, the pattern layer 102 is precisely positioned on the inner surface of the polymer layer by screen printing or inkjet printing; then, the pattern is cured by ultraviolet light curing treatment (wavelength 300-405 nm, irradiation intensity 50-200 mW / cm², curing dose 350 mJ / cm²) to form a preliminary interface bond between the pattern material and the surface of the polymer layer; then, in the hot pressing compounding stage, the second thermoplastic polymer layer 103 is aligned with the cured pattern layer, and the hot pressing compounding stage is entered; finally, cooling and shaping and three-dimensional inspection are carried out, and finally the finished product is output or the waste is treated. The printing parameters in the figure are set as viscosity 10-3000 mPa·s, positioning accuracy ±0.1 mm, UV curing wavelength 300-405 nm, intensity 50-200 mW / cm², hot pressing temperature set to 70%-90% of the material Tm, pressure 3-10 MPa, and frequency 1-5 Hz.

[0034] like Figure 4 As shown in the figure, the pulse hot pressing principle diagram further illustrates the interface evolution process in the molten state: the initial state is the mold loading of the laminated component; then the material is partially melted through the heating stage; under the set pulse pressing conditions, the polymer molecular chains gradually penetrate into the pattern layer material to form an interpenetrating network; after multiple rounds of pressing and holding pressure, a composite membrane structure with a bonding strength ≥5 MPa and a bubble rate ≤0.5% is finally formed.

[0035] In another supplementary embodiment, the pattern layer is not fully cured. After pattern formation, it undergoes only a brief UV pre-curing (e.g., 10 seconds at a dose of 100 mJ / cm²) to form a gel-like film. Heat-press lamination is then performed, allowing the pattern layer to further crosslink and cure during the heat-pressing process, simultaneously forming a bonding interface with the second thermoplastic polymer layer. This solution is suitable for rapid, high-volume production, offering higher curing efficiency and greater pattern material stability.

[0036] like Figure 5 As shown, in another embodiment, the film of the present invention may include three or more thermoplastic polymer layers (501 to 504), with independent pattern layers (505 to 507) disposed between the layers. Each pattern layer corresponds to an independent pattern pattern, which is used to form a three-dimensional or sequential pattern structure. For example, background layer 507 may include a pH-responsive coating, while pattern layers 505 and 506 carry functional patterns A and B, respectively, creating a spatially displaced three-dimensional visual effect and simultaneously achieving multiple functions.

[0037] In one embodiment, a pattern-printed membrane using a double-layer TPU structure is constructed, suitable for visualizing the wear progress of children's braces. The first layer of TPU film (brand: BASF 1185A) is 0.15 mm thick and, after plasma surface treatment, is inkjet-printed on its inner surface. The pattern ink contains spiropyran photochromic microcapsules (20 wt%) and uses IBOA and DPHA as reactive monomers. Curing is performed using UV light with a wavelength of 365 nm and an intensity of 120 mW / cm², with a curing dose of 350 mJ / cm². Hot pressing conditions are set at 175°C, 6 MPa pulse pressure, a frequency of 3 Hz, and a dwell time of 1.2 seconds per pulse, for a total press time of 30 seconds. After completion, the membrane is gradient-cooled to achieve a final interfacial bond strength of 8.7 MPa. During wear, the pattern changes from blue to colorless within 5 seconds when the temperature rises to 45°C, demonstrating excellent color change response and maintaining over 95% visibility even after 5,000 toothbrushing cycles.

[0038] In another embodiment, a three-layer PETG composite film is constructed for X-ray positioning of complex cases of adult patients. The inner layer is 0.2mm thick, the outer layer is 0.1mm thick, and the pattern layer is printed with a positioning pattern containing 20wt% barium sulfate nanoparticles and 15wt% fluorescent rare earth Gd2O3:Eu. 3+ Each layer of the pattern is cured with 385nm UV light at a dose of 400mJ / cm². The hot pressing lamination temperature is set at 195°C, which corresponds to 89% of the Tm of PETG at 220°C, and the interfacial bonding strength exceeds 7.2 MPa. The contrast ratio under X-ray development is no less than 30%, meeting the requirements of medical image recognition.

[0039] In another example, a five-layer TPU / PETG hybrid membrane with integrated pH response was produced. The pattern layer used HEMA as the primary monomer, with 15 wt% bromocresol purple added as a pH indicator, and PETA as the crosslinker. After printing, each layer was UV-cured (wavelength 405 nm, 180 mW / cm²). Different temperature and pressure conditions were applied between the pattern layers, ensuring that the TPU layer was at 180°C and the PETG layer was at 210°C, with pulse pressures of 5 MPa and 8 MPa, respectively. The final pH color change response time was less than 10 seconds, and the interlayer bond strength was no less than 4.9 MPa. After 30 days of immersion in artificial saliva, the functional retention rate reached 98%.

[0040] In another embodiment, a five-layer diaphragm for aesthetic orthodontics was designed and manufactured, integrating photochromic, pH-responsive, and anti-fouling functions. This diaphragm utilizes alternating TPU / PETG layers. Pattern A is a photochromic progress bar (containing 25 wt% spiropyran microcapsules), and pattern B is a pH-responsive grid (containing 15 wt% bromocresol purple). An anti-fouling coating (a nano-SiO2 dispersion with a contact angle >110° after drying) is formed on the surface of the PETG layer, effectively inhibiting the adsorption of pigments such as coffee and tea stains. During the manufacturing process, all pattern layers are pre-cured and then laminated. The TPU lamination temperature is 175°C, and the PETG lamination temperature is 190°C. The interlayer bond strengths are 7.3 MPa and 6.8 MPa, respectively. Performance testing shows no staining within 30 days of wear, and the pattern visibility retention rate reaches 98%.

[0041] In another embodiment, the membrane uses a bio-based thermoplastic polyester (such as a modified PBS or PLA) as the thermoplastic polymer layer, with a polymer layer thickness of 0.25 mm. To enhance the compatibility between the pattern layer and the bio-based material, a monomer structure with transesterification activity (such as vinyl hexanoate) is introduced into the pattern material. The pattern is a type of intelligent graphic that changes color in response to UV irradiation. The curing method is dual-band irradiation (365nm + 405nm combination), with a total dose controlled at 500mJ / cm². This combination achieves a bonding strength of 7.1MPa without the need for an additional primer or intermediate adhesive layer, combining environmental friendliness with clinical safety.

[0042] The above embodiments can all be achieved through a continuous roll-to-roll production process, with a production speed of up to 12m / min and a stable yield, suitable for industrial mass production needs. The functional ink system, hot pressing parameters, and curing technology used are all based on a universal equipment platform, with good replicability and scalability. In one manufacturing process optimization embodiment, the functional sheet is prefabricated through a pattern layer preforming process (the middle pattern layer is first UV cured, cut, and stacked), and then composited with a double-sided polymer film in the roll-to-roll line. This method allows for standardized batch production of pattern modules and subsequent assembly and packaging, improving the efficiency of the flexible process. The hot pressing temperature control accuracy is improved to ±1°C, and a three-stage heating rate is set (50°C / min in the initial stage, 15°C / min in the middle stage, and 3°C / min in the final stage) to match the thermal expansion behavior of different materials. The bubble rate of the product is reduced to 0.2%, and the average interfacial bonding strength is increased by more than 12%.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pattern printed film for a dental appliance, characterized in that: include: At least two thermoplastic polymer layers, wherein the material of the thermoplastic polymer layers is selected from one of the following or a combination thereof: thermoplastic polyurethane, polyethylene terephthalate, polyhexamethylene terephthalate, polyamide, polyethylene, polycarbonate, polymethyl methacrylate, ethylene-vinyl acetate copolymer, polyethersulfone or blends and modifications thereof; and at least one pattern layer, which is sandwiched between any two adjacent thermoplastic polymer layers, has a physical thickness of 5μm to 150μm, and contains a type of curable pattern material. The pattern material forms a spatial three-dimensional pattern structure after curing, and forms chemical bonding interfaces with adjacent thermoplastic polymer layers at the upper and lower interfaces, thereby forming an encapsulated sandwich structure. The pattern is an embedded three-dimensional pattern in the final structure of the diaphragm and can be clearly identified through the outer layer of polymer.

2. The pattern printed film according to claim 1, characterized in that: The pattern material is a type of photocurable composition, comprising: a monomer or oligomer having a vinyl or allyl structure; an optional diluting comonomer or reactive diluent; and a photosensitive component having photoinitiating ability, capable of inducing free radical or cationic polymerization reactions under ultraviolet light irradiation. The composition has a viscosity of 10 to 3000 mPa·s at 30°C, the mass percentage of the main reaction monomer accounts for 5% to 70% of the reactive system, and the reactive monomer has interfacial bond compatibility with the thermoplastic polymer layer in terms of structure or group.

3. The pattern printed film according to claim 1, characterized in that: The composition contains reactive structural units compatible with the thermoplastic polymer layer. These structural units include vinyl, allyl, aromatic vinyl, or amide groups, which react with residual functional groups or copolymeric segments in the polymer layer during polymerization and curing to form a copolymer or cross-linked network at the interface.

4. The pattern printed film according to claim 3, characterized in that: The molar ratio of the vinyl unsaturated groups contained in the monofunctional monomer and the multifunctional monomer in the pattern material is not less than 10:1, and the mass percentages of the vinyl unsaturated groups in the composition are not less than 25%.

5. The pattern printed film according to any one of claims 1 to 4, characterized in that: The film comprises three or more thermoplastic polymer layers, each pattern layer is sandwiched between two adjacent polymer layers, and the three-dimensional patterns formed by each pattern layer are independent of each other, and are used to form a three-dimensional or sequential pattern structure.

6. The pattern printed film according to claim 1, characterized in that: The pattern layer contains at least one functional pattern unit, and the functional pattern unit includes one of the following or a combination thereof: a photochromic pattern for reflecting the progress of correction, a fluorescent particle pattern that can be developed by X-rays, and a pH-sensitive color-changing pattern that responds to changes in oral pH.

7. A method for manufacturing a pattern-printed film for a dental appliance, characterized in that: The following steps are involved: (1) providing a first thermoplastic polymer layer, wherein the polymer is selected from one of the following or a combination thereof: thermoplastic polyurethane, polyethylene terephthalate, polyhexamethylene terephthalate, polyamide, polyethylene, polycarbonate, polymethyl methacrylate, ethylene-vinyl acetate copolymer, polyethersulfone or a blended modified product thereof; (2) forming a pattern layer on the inner surface of the polymer layer, wherein the pattern layer is composed of a type of curable pattern material, has the ability to be converted into a solid state under subsequent processing, and forms an interface bond with the thermoplastic polymer layer; (3) curing the pattern layer to convert it into a solid pattern with a three-dimensional solid thickness and forming a preliminary bonding interface with the surface of the first thermoplastic polymer layer; (4) Aligning and overlapping the second thermoplastic polymer layer with the pattern layer, placing the layer in a mold and heating it to 70% to 90% of the melting temperature (Tm) of the thermoplastic polymer material, and applying pulsed pressure to chemically bond the pattern layer to the interface of the second polymer layer; (5) Cooling and shaping to obtain an integrated structure with the packaging pattern in the middle of the diaphragm.

8. The manufacturing method according to claim 7, characterized in that The pattern curing process in step (3) is ultraviolet light irradiation scanning, with a wavelength between 300 nm and 405 nm and an irradiation intensity of 50 to 200 mW / cm².

9. The manufacturing method according to claim 7, characterized in that: The duration of the heating treatment in step (4) is 10 to 60 seconds, the peak value of the pulse pressure is 3 to 10 MPa, the frequency is 1 to 5 Hz, the direction of the pulse pressure is perpendicular to the laminate plane, and the single holding time is 0.5 to 3 seconds.

Images