Multifunctional composite laminated product and manufacturing method

Abstract

The invention discloses a multifunctional composite laminated product and a manufacturing method, the product comprises a base layer and a functional interlayer which realize interlayer combination through a physical or chemical method, the base layer is D-type outer layer cloth or C-type material cloth, and the functional interlayer is B-type material cloth or C-type material cloth. The B-type substance is a physical property entity prepared from the A-type substance and metal, ceramic or organic and inorganic materials, the C-type substance cloth is a flexible functional carrier prepared from the A-type substance and fiber fabric, and the C-type substance cloth can be single-layer or multi-layer and can contain the same or different A-type substances. The substance A contains but is not limited to photo-thermal, electromagnetic or ion release type functional materials. Through the distribution structure of the B-type substances and the C-type substances, efficient integration of various physical property materials is achieved, the synergistic effect is exerted, the problem of synergistic integration of multifunctional materials is solved, the structure and arrangement are optimized, various shapes and flexible arrangement of the B-type substances are supported, and the product performance and adaptability are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and in particular to a multifunctional composite laminated product and a manufacturing method thereof. Background Art

[0002] In today's functional materials sector, composite laminated products are widely used in industries such as healthcare, sports equipment, and apparel. These products integrate physical performance materials such as far infrared rays, tourmaline, negative ions, energy magnets, graphene, and silver ions (collectively referred to as type A substances) to provide health-promoting functions such as promoting blood circulation, antibacterial properties, and energy release. According to industry reports (such as the "China Functional Textile Development Report 2024"), the global market demand for multifunctional composite products has an annual growth rate of more than 15%, especially in Asia, where consumers' attention to health wearable products continues to rise. In terms of technological development, hot press molding and laminating processes have become mainstream, but existing technologies have bottlenecks in multi-material integration and structural optimization. This is specifically reflected in the following points: Currently, existing far-infrared textiles require external heating to activate, the energy release is uncontrollable, and they rely on power supply, which leads to high energy consumption and safety hazards.

[0003] In the existing technology, functional materials mostly exist in a single form. When multi-layered, there are problems such as low bonding strength, functional attenuation, and complex processes. In addition, there is a lack of systematic design of the functional material form (such as shape and arrangement). The disordered arrangement leads to energy field interference and limits the functional synergistic effect.

[0004] Traditional bonding processes (such as gluing and sewing) are inefficient and cannot achieve integrated molding of complex structures. The traditional bonding process has loose interlayer structures, resulting in performance degradation, and uneven distribution of colloids leads to displacement of functional layers.

[0005] Specifically for laminated products, such as belts and knee pads, existing technologies mainly use layered structures to integrate functional materials. For example, the base layer (D-type outer cloth) is used to provide support and comfort, the functional interlayer (B-type material or C-type material cloth) is embedded with physical performance materials, and the auxiliary interlayer (such as sponge, EPE or EVA composite materials) enhances cushioning and is bonded by E-type material glue (laminated glue). Velcro (F-type material sticker) is used for convenient fixation. However, existing solutions often face problems such as complex processes and poor material compatibility when realizing the composite of multiple A-type substances (such as the synergy of far infrared rays and graphene). The existing technology has the following core shortcomings: 1. Insufficient material integration: Existing solutions (such as CN202410000789A) only support a single type A substance (e.g., a single type B substance or a single layer of type C material fabric), and are unable to effectively coordinate multiple physical performance materials (such as far infrared rays, negative ions, graphene, etc.). This results in a single function and an inability to achieve the synergistic effects of multiple materials (such as the complementary effect of energy magnets and far infrared rays).

[0006] 2. Poor structural flexibility: Class B materials are limited in shape (circular, rectangular) and arrangement (standard matrix only). This reduces product adaptability and performance optimization space.

[0007] 3. Process complexity and comfort issues: Existing multi-layer lamination processes (such as four-layer heat pressing) often result in poor lamination or bubble formation due to poor material compatibility (see the article in Materials Science and Engineering). Insufficient integration of auxiliary interlayers (such as sponges) also affects wearer comfort.

[0008] 4. Functional redundancy and high cost: The inability to combine materials on demand (such as "multi-layer, multi-type C-substance cloth") leads to excessive use of resources and increased production costs (industry reports indicate that redundant design increases costs by more than 20%). Summary of the Invention

[0009] The purpose of the present invention is to provide a multifunctional composite laminated product and a manufacturing method to solve the technical problems of complex process and poor material compatibility often encountered in the prior art when compounding multiple A substances.

[0010] In order to solve the above technical problems, the present invention provides a multifunctional composite laminated product, comprising: a base layer and a functional interlayer that achieve interlayer bonding through physical or chemical methods, the base layer is a Class D outer layer cloth or a Class C material cloth, the functional interlayer is a Class B material or a Class C material cloth, the Class B material is a physical property entity made of a type A substance and a metal, ceramic or organic and inorganic material, the Class C material cloth is a flexible functional carrier made of a type A substance and a fiber fabric, the Class C material cloth can be a single layer or multiple layers, and the Class C material cloth can contain the same or different types of A substances.

[0011] Preferably, the substance A includes but is not limited to photothermal, electromagnetic or ion-releasing functional materials, including far infrared rays, tourmaline, negative ions, energy magnets, graphene, silver ions, photonic crystals, liquid metals or rare earth elements.

[0012] Preferably, the shape of the Class B substance can be circular, rectangular, rounded rectangular or mesh structure, and the combination and arrangement of the two or more Class B substances can be a matrix structure, a staggered matrix structure, a staggered arrangement or a superimposed combination. The implantation of the Class B substance can be achieved using a magnetic levitation positioning process.

[0013] Preferably, it also includes an auxiliary interlayer and a reusable mechanical fixing device, wherein the auxiliary interlayer is a chemical composite material, including sponge, aerogel, EPE or EVA, and the auxiliary interlayer can be realized using a foaming in-situ molding process, and the reusable mechanical fixing device can be an F-type material patch, a magnetic buckle or a self-adhesive silicone tape, and the F-type material patch can be a Velcro.

[0014] Preferably, the chemical method is to use E-type glue for bonding, and the E-type glue includes synthetic chemical glue, biological glue or light-curing glue.

[0015] Preferably, the physical method is to use an ultrasonic bonding process or a laser sintering process to achieve multi-layer bonding.

[0016] Another technical solution provided by the present invention is: a method for manufacturing a multifunctional composite laminated product, which adopts a hot pressing laminating process, a cold pressing laminating process, or a 3D printing direct molding process.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Breaking through technical bottlenecks and improving material synergy: For the first time, through the "multiple A-type and B-type materials" and "multi-layer and multiple C-type material fabric" structures, the efficient integration of multiple physical performance materials such as far infrared rays and tourmaline is achieved, and synergistic effects are exerted (such as the combination of graphene's thermal conductivity and negative ions' antibacterial properties), solving the problem of synergistic integration of multifunctional materials.

[0018] 2. Optimized structure and arrangement: Supports diverse shapes (circular, rectangular, rounded rectangle, elliptical, diamond or mesh structure) and flexible arrangements (matrix, staggered matrix, staggered or superimposed, honeycomb, gradient) of Class B materials, enhancing product performance and adaptability.

[0019] 3. Technological innovation, simplified process and enhanced comfort: The hot pressing molding process is used to achieve seamless integration of Class D outer fabric, Class E material glue, auxiliary interlayer (sponge / EPE / EVA / aerogel) and functional materials, ensuring a firm fit and good cushioning. The hot pressing molding process is compatible with elastic materials such as sponge / EPE, avoiding interlayer peeling (peel strength ≥ 8N / cm, higher than the industry standard of 5N / cm).

[0020] 4. Reduce costs and improve versatility: All fitting variants (such as three-layer fitting, four-layer fitting and multi-layer reconstruction) have been systematized to solve existing technical bottlenecks and promote industry progress. Through modular design (such as Velcro fixation), it supports multiple application scenarios (belts, protective gear), reduces material waste, and conforms to the trend of sustainable development.

[0021] 5. Wide application: Applicable to medical protective gear, sports equipment and other fields (such as low back pain belts, knee protectors), realizing "one item with multiple functions". BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the basic structure of the multifunctional composite laminated product of the present invention; Figure 2 This is a schematic diagram of the structure of an embodiment of the multifunctional composite laminated product of the present invention; Figure 3 This is the second schematic diagram of the structure of the embodiment of the multifunctional composite laminated product of the present invention; Figure 4 This is the third structural diagram of an embodiment of the multifunctional composite laminated product of the present invention; Figure 5 This is the fourth structural diagram of an embodiment of the multifunctional composite laminated product of the present invention; Figure 6 This is the fifth structural diagram of an embodiment of the multifunctional composite laminated product of the present invention; Figure 7 This is the sixth structural diagram of the embodiment of the multifunctional composite laminated product of the present invention; Figure 8 This is the seventh structural diagram of the embodiment of the multifunctional composite laminated product of the present invention; Figure 9 This is the eighth structural diagram of an embodiment of the multifunctional composite laminated product of the present invention; Figure 10 This is the ninth structural diagram of an embodiment of the multifunctional composite laminated product of the present invention; Figure 11 This is the tenth schematic diagram of the structure of the embodiment of the multifunctional composite laminating product of the present invention; Figure 12 This is a flow chart of the hot pressing forming and laminating process of the present invention; Figure 13 This is a flow chart of the cold pressing laminating process of the present invention; Figure 14 This is a flow chart of the 3D printing direct molding process of the present invention; Figure 15 This is a flow chart of the foaming in-situ molding process of the present invention; Figure 16 This is a flow chart of the magnetic levitation positioning process of the present invention; Figure 17 This is a process flow chart of the laser sintering process of the present invention; Figure 18 This is a flow chart of the ultrasonic bonding process of the present invention. DETAILED DESCRIPTION

[0023] In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or Internet of Things terminal that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or Internet of Things terminals.

[0024] In addition, references to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of such phrases in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-10 As shown, the present invention provides a multifunctional composite laminated product, comprising: a base layer and a functional interlayer that achieve interlayer bonding through physical or chemical methods, the base layer is a Class D outer layer cloth or a Class C material cloth, the functional interlayer is a Class B material or a Class C material cloth, the Class B material is a physical property entity made of a type A substance and a metal, ceramic or organic and inorganic material, the Class C material cloth is a flexible functional carrier made of a type A substance and a fiber fabric, the Class C material cloth can be a single layer or multiple layers, and the Class C material cloth can contain the same or different types of A substances.

[0027] Among them, the type A substance includes but is not limited to photothermal, electromagnetic or ion-releasing functional materials, including far infrared rays, tourmaline, negative ions, energy magnets, graphene, silver ions, etc., and may also include: photonic crystals (instead of far infrared rays to achieve photothermal conversion), liquid metals (instead of graphene to enhance thermal conductivity), rare earth elements (such as neodymium, replacing energy magnets to enhance magnetic field strength).

[0028] The Class B substances are organic or inorganic entities or fabric-based "related physical property materials" (physical property products) made by making the Class A substance into iron sheets (or other metal sheets), ceramics (or other synthetic products such as stone powder), or plastics (or silicone), etc. One of the above substances may be used in conjunction with one or two or more substances depending on production requirements. Class B substances can be physical property entities made of the Class A substance and all metals, ceramics, or organic and inorganic materials, for example: Single A type B substance: far infrared iron sheet; Multiple A and B materials: far infrared ceramic sheet + energy magnet sheet.

[0029] Substrate replacement for Class B materials: Metal sheets: titanium alloy (lightweight alternative to iron sheets), shape memory alloy (adaptive fitting); Ceramics: Silicon nitride (a wear-resistant alternative to stone powder composites); Organic Materials: Bio-based plastics (environmentally friendly alternative to petroleum-based plastics).

[0030] Type C fabrics are knitted fabrics, elastic bands, polyester fabrics, nylon fabrics, or other knitted fabrics made from Type A substances, such as far infrared rays, tourmaline, negative ions, energy magnets, graphene, and silver ions. Depending on production requirements, one of these substances can be stacked in a single layer or multiple layers (1 ≤ number of layers ≤ N, where N is a natural number ≥ 2). Each layer of Type C fabric can contain the same or different Type A substances. Type C fabrics can be flexible functional carriers woven from any fiber, for example: Outer cloth + far infrared nylon cloth is: single layer single type C material cloth; Outer fabric + far infrared nylon fabric + silver ion knitted fabric is: multi-layered and multi-type C material fabric.

[0031] Fiber replacement for Class C material cloth: Natural fibers: bamboo fiber (antibacterial alternative to silver ion cloth), seaweed fiber (negative ion release alternative to chemical synthetic cloth); Synthetic fibers: polylactic acid fiber (degradable alternative to polyester), carbon nanotube yarn (conductive alternative to graphene cloth).

[0032] Category D outer fabric is a simple knitted fabric, or elastic band, or polyester fabric or nylon fabric, or other knitted fabrics.

[0033] Furthermore, the multifunctional composite laminated product also includes an auxiliary interlayer and a mechanical fixing device that can be opened and closed repeatedly.

[0034] The auxiliary interlayer can be a porous material such as sponge, which is used to adjust the interlayer bonding strength or cushioning performance, or it can be a chemical composite material, including EPE or EVA. The auxiliary interlayer can be realized using a foaming in-situ molding process, where liquid EVA is injected between layers and self-foamed to fill the gaps (instead of pre-cut sponge). Nanoporous material aerogel can also be used, which is an ultra-light alternative to EPE and has a 200% increase in thermal insulation.

[0035] The re-openable and re-closable mechanical fixing device may be an F-type material patch, a magnetic buckle (noiseless opening and closing) or a self-adhesive silicone tape (waterproof alternative). The F-type material patch may be a Velcro with the fleece side / hook side designed separately, for example, on the left and right back of the belt.

[0036] Furthermore, the chemical method is to use E-type adhesive (microporous breathable adhesive film) for bonding, and the E-type adhesive includes synthetic chemical adhesive, biological adhesive or light-curing adhesive. The E-type adhesive has microporous adhesive properties and meets bonding and breathability standards.

[0037] Among them, the type E substance glue can be a synthetic chemical glue, such as an acrylic glue containing a silver ion coating (the silver ion concentration in the glue layer is 0.5-2wt%) or a polyurethane film or other bonding glue; Class E material glue can also be: Bio-glue: Chitosan glue (biocompatible alternative to chemical glue); Light-curing adhesive: UV curing adhesive (speeds up the process and replaces hot melt adhesive).

[0038] Specifically, the core structure design of the present invention is described as follows: Base layer: Use either a Class D outer layer fabric or a Class C material fabric (which may contain the same or different Class A materials) as the outer layer of the product. A Class C material fabric composite uses a single or multiple layers of multiple Class C material fabrics (e.g., graphene fabric + silver ion knitted fabric). The Class D outer layer serves as the base support layer.

[0039] Functional interlayer: Uses either Type C material or Type B material. Type B material can include a single Type A Type B material (Type A material made into a composite product such as iron or other metal sheets, ceramic sheets or other stone powders, or plastic or silicone sheets with solid physical properties) or multiple Type A Type B materials (a combination of two or more Type B materials). The shapes are circular, rectangular, rounded rectangular, or mesh (see the accompanying drawings for examples but not limitation), and arranged in a matrix, staggered matrix, staggered arrangement, or stacked combination.

[0040] Furthermore, variant implementations of the multi-layer lamination structure include: Three-layer lamination: Class D outer cloth + Class E adhesive + Class C cloth. Class C cloth or Class D outer cloth is on the upper and lower layers, and the middle surface is laminated (coated) with Class E adhesive. After hot pressing, a "cloth-adhesive-cloth" three-layer structure is formed.

[0041] Four-layer lamination: D-type outer cloth + E-type material glue + single / multiple A-type B-type materials + D-type outer cloth, single / multiple A-type B-type materials (such as far-infrared iron sheet + energy magnet sheet) and E-type material glue are embedded between the D-type outer cloth (or C-type material cloth) to form a four-layer structure of "cloth-B material-glue-B material-cloth".

[0042] Multi-layer composite: two layers of Class C material cloth (such as graphene cloth + negative ion cloth) are superimposed, with multiple types of Class A and Class B materials (such as silver ion ceramic sheet matrix) and Class E material glue sandwiched in the middle to form a five-layer or more functionalized bonded body, such as Class D outer layer cloth + Class E material glue + Class C material cloth + Class E material glue + Class B material + Class D outer layer cloth.

[0043] Assisted interlayer integration: sponge / EPE / EVA / aerogel embedded in any layer.

[0044] Auxiliary structure: F-type material stickers (such as Velcro) can be integrated on the edge of the product. The left side of the belt is fleece-surface Velcro, and the right side is hook-surface Velcro. The size adjustment and fixed fit of the product can be achieved through Velcro.

[0045] Furthermore, the topological variations of the stacked structure are:

[0046] Functional design: Through the shape of Class B materials (such as rounded rectangles to reduce stress concentration), arrangement (staggered matrix to improve functional uniformity) and material combination (such as the synergistic antibacterial effect of graphene and silver ions), multifunctional synergy such as far-infrared radiation, negative ion release, and magnetic field regulation is achieved.

[0047] Furthermore, the permutations of the B-type substances are: Shape expansion: hexagonal (dense paving for enhanced efficiency), ring (uniform magnetic field distribution); Expanded arrangement to achieve uniform distribution of energy field: Fractal arrangement (such as snowflake structure, improving coverage uniformity); Dynamic arrangement (temperature-sensitive shape memory alloy, changing spacing with body temperature).

[0048] For example: the nested arrangement of ring-shaped energy magnet pieces and hexagonal ceramic pieces.

[0049] Furthermore, alternative implant technologies for Class B materials include: magnetic levitation positioning process (avoiding hot pressing displacement) and laser sintering process (local melting and fixation, eliminating the glue layer).

[0050] like Figure 15 As shown, the steps of the magnetic levitation positioning process are: ①Electromagnetic array construction: Electromagnets (magnetic flux density 0.5 T) were embedded in the hot press platform and energized according to the preset arrangement.

[0051] ② Pre-setting of Class B materials: Spread the energy magnet sheets (NdFeB material) on the D layer of cloth base material.

[0052] ③Suspended positioning: The electromagnetic field is activated and the magnetic piece is suspended to the target position (accuracy ±0.1mm).

[0053] ④Lamination fixation: Cover with E type material glue and upper layer D cloth, and press lightly with non-magnetic roller (pressure 5N / cm).

[0054] ⑤ Adhesive layer curing: UV curing (wavelength 405nm, intensity 50mW / cm², time 10s).

[0055] The innovation of magnetic levitation positioning technology lies in: Zero-contact positioning: avoid thermal displacement (position error < 0.1mm); Multi-shape compatibility: supports synchronous positioning of circular / annular / special-shaped magnetic pieces.

[0056] like Figure 16 As shown, the principle of laser sintering process is: Selective melting: A laser beam (1064nm fiber laser) sintered the functional powder (silver ion / graphene mixed powder) point by point to form a Class B material layer. The powder formula ratio needs to be limited, such as the graphene + tourmaline composite powder ratio of 1:3.

[0057] Direct Forming: Skip the lamination step and build the composite structure in one go, using a scan path algorithm and spiral filling to avoid internal stress.

[0058] The specific steps are: ① Powder laying: evenly spread functional powder (particle size 5-20μm) on the D layer of cloth with a layer thickness of 0.1mm; ② Sintering: laser power 50-100W, scanning speed 1m / s, melting powder to form patterned Class B material; ③ Stacking: Repeat powder spreading + sintering until a multi-layer structure is completed; ④ Strengthening: Silicone oil impregnation improves flexibility (applicable to curved surfaces of protective gear).

[0059] The advantages of laser sintering process are: Precision advantage: minimum feature size 0.1mm (supports ceramic chip staggered matrix arrangement); Material utilization rate: 95%+ (compared to 30% loss in hot pressing and cutting); Clinical testing: The laser-sintered silver ion layer has an antibacterial rate of 99.8% (ISO 22196).

[0060] Furthermore, the physical method is to use ultrasonic bonding or laser sintering to achieve multi-layer bonding, specifically ultrasonic waves with a frequency of 20-40kHz or lasers with a wavelength of 1064nm. Class B materials are integrated in the form of powder melting or solid sheets.

[0061] like Figure 17 As shown, the principle of ultrasonic bonding process is: Energy transfer mechanism: High-frequency vibration (20-40kHz) causes frictional heating of material molecules, which results in local melting and bonding (no glue required).

[0062] Applicable materials: thermoplastic fabrics (polyester / nylon), plastic-based Class B materials (silicone tourmaline sheets).

[0063] The specific steps are: ① Pretreatment: Clean the material surface (plasma treatment improves activity); ② Positioning: D layer cloth + B type material + auxiliary layer (sponge) are precisely aligned; ③ Pressing: The welding head applies pressure (0.3-0.6MPa), maintains the pressure for 0.5-1s, and vibrates the melting interface at high frequency; ④ Shaping: Cooling under pressure to form molecular chain entanglement seams.

[0064] The advantages of ultrasonic bonding process are: Strength test: peel strength ≥6.5N / cm (GB / T 2790), close to hot pressing process (8N / cm); Thermal damage control: local temperature rise <80°C (infrared thermal imaging), protecting sensitive materials such as graphene; Energy consumption comparison: 70% energy saving compared to hot pressing (measured power 1.2kW vs 4kW).

[0065] This process can also innovatively introduce pre-coated energy-guiding ribs (PET strips) to focus ultrasonic energy and improve bonding accuracy.

[0066] The comparison table between ultrasonic bonding process and laser sintering process is as follows:

[0067] like Figure 14 As shown, the steps of the foaming in-situ molding process (auxiliary interlayer replacement) are: ① Reserved cavity between layers: a microporous template (aperture 1mm, hole spacing 3mm) is pre-placed between the D layer cloth and the C type material cloth; ②EVA injection: Liquid ethylene vinyl acetate (8% foaming agent content) is injected into the cavity (injection volume 150g / m²); ③ Foaming trigger: heating to 80°C or microwave radiation (2.45GHz) to trigger foaming (expansion rate 300%); ④ Cavity filling monitoring: real-time detection by pressure sensor (threshold 0.15MPa) to ensure that the gap is filled; ⑤ Shaping and demolding: Cool to room temperature, remove the microporous template, and form a closed-cell foam interlayer.

[0068] The innovative features of the foaming in-situ molding process are: Adaptive filling: foaming pressure precisely matches the gap between layers; Weight reduction effect: 40% lighter than pre-cut sponge (density 0.03g / cm³).

[0069] Another technical solution provided by the present invention is: a method for manufacturing a multifunctional composite laminated product, which adopts a hot pressing laminating process, a cold pressing laminating process, or a 3D printing direct molding process.

[0070] Among them, the hot pressing molding bonding process achieves bubble-free bonding between layers through hot pressing pressure control. Specifically, a hot pressing molding process or external pressure (such as rolling, molding) is used to form a molecular-level bond or mechanical interlocking structure between the C-type material cloth and the B-type material and the E-type material glue. For multi-layer structures, the C-type material cloth, the B-type material, the E-type material glue (or other functional layers) can be stacked in sequence, and the temperature (100-200°C), pressure (0.5-5MPa) and time (10-60s) parameters are controlled to achieve bubble-free and high-strength bonding between layers.

[0071] like Figure 11 As shown, the hot pressing forming and laminating process steps are: 1. Material pretreatment Pretreatment of Class C fabrics: Place knitted fabrics, elastic bands and other Class C materials in a constant temperature and humidity environment (temperature 25±2℃, humidity 40±5%RH) for 24 hours to eliminate internal stress in the fibers; perform plasma treatment on the fabric surface (power 50-100W, time 10-30 seconds) to improve surface hydrophilicity and roughness (surface contact angle ≤ 60°) and enhance adhesion to the adhesive layer.

[0072] Pretreatment of Class B materials: Surface cleaning (10 minutes of alcohol ultrasonic cleaning) of Class B materials such as metal sheets (energy magnets), ceramic sheets (far infrared, tourmaline, graphene), and plastic sheets (negative ions, silver ions) is performed to remove oil stains and oxide layers; edge rounding (R angle 0.3-0.5mm) is performed to avoid stress concentration and interlayer cracking.

[0073] 2. Structural design and material configuration Single / multi-layer Class B material arrangement: Based on design requirements, Class B materials are fixed in a positioning fixture in a matrix structure (row and column spacing 0.5-5mm), a staggered matrix structure (adjacent rows and columns offset 0.2-1mm), or a stacking method (inter-layer staggered stacking 0.1-0.3mm) to form a preset arrangement model (e.g., rounded rectangular Class B materials are arranged in a hexagonal close-packed pattern).

[0074] Auxiliary material configuration: Use hot-melt polyurethane film (Type E material glue) or polyurethane sponge (density 10-50kg / m³). The sponge is pre-cut into a hollow structure that matches the Type B material (hollowing rate 30%-70%) to balance the bonding strength and the air permeability of the functional material.

[0075] 3. Adhesive layer process Molding method: Pre-cut the E-type adhesive, such as hot-melt polyurethane adhesive film, to the size that matches the C-type cloth, and hot-press the E-type adhesive onto the C-type cloth. By controlling the temperature (100-200°C), pressure (0.5-5MPa) and time (10-60s) parameters, a bubble-free, high-strength bond is achieved.

[0076] Coating method: Use screen printing (screen mesh 200-400 mesh), comma blade coating or spraying process to evenly apply type E glue on the surface of type C cloth. The thickness of the glue layer is controlled to be 0.1-1mm (real-time monitoring by laser thickness gauge, error ±0.02mm).

[0077] Edge protection: Mask the 1-3mm area around the edge of the Class C material cloth to prevent the glue from overflowing and contaminating the adhesive surface of the Velcro (Class E material sticker).

[0078] 4. Hot pressing process

[0079] 5. Multi-layer composite structure superposition process Three-layer lamination (cloth-adhesive-cloth): After completing the hot pressing of the first layer of "Class D outer cloth + Class E material adhesive", immediately align the third layer of Class C material cloth (such as negative ion cloth) with the adhesive layer and repeat the hot pressing process to ensure that the inter-layer alignment accuracy is ≤0.5mm.

[0080] Four-layer lamination containing Class B material: pre-arranged Class B material (such as far-infrared iron sheet + energy magnet sheet) is embedded between Class D outer cloth + Class E material glue + Class C material cloth, and precisely positioned by a robotic arm (positioning accuracy ±0.2mm), and then coated with Class E material glue and hot pressed to make the embedding depth of Class B material 60%-80% of the thickness of the glue layer.

[0081] Multi-layer composite containing sponge: first stack "D outer cloth + E material glue + sponge + B material + E material glue + C material cloth" in order, and control the pressure ≤1.5MPa during hot pressing to avoid excessive compression of the sponge.

[0082] 6. Post-processing and testing Demolding and trimming: After cooling, demould with a vacuum adsorption device, and use a laser cutting machine to trim the edges (burr ≤ 0.1mm), leaving the Velcro pasting area (width 20-50mm).

[0083] Quality inspection: Appearance inspection: Visually inspect the adhesive layer to ensure there are no bubbles or delamination, and that Class B materials have no offset (offset ≤ 0.3mm); Peel strength test: According to GB / T 2792-2014 standard, peel force ≥ 5N / cm (interface between adhesive layer and Class C fabric); Functional stability test: Aging for 240 hours at 85℃ / 85%RH environment, far infrared emissivity attenuation ≤10%, negative ion release attenuation ≤15%.

[0084] Among them, the key nodes are described as follows: 1. Positioning tooling: Use a high-precision positioning platform (repeat positioning accuracy ±0.05mm) and cooperate with the visual recognition system (CCD camera) to calibrate the position of Class B materials in real time; 2. Parameter closed-loop control: The PLC system collects temperature and pressure sensor data in real time and compares it with the preset process curve. If the deviation is greater than 5%, an automatic alarm will be issued and the machine will be shut down. 3. Compatibility design: The same process equipment can achieve three-layer / four-layer / multi-layer structure switching by replacing the coating head and mold, and the changeover time is ≤30 minutes.

[0085] The actual technical effect of hot pressing forming and bonding process: Experimental data: After testing, the three-layer laminated product prepared using this process has a shear strength of 8.2MPa (compared to 6.5MPa in the existing technology), and the shedding rate of Class B substances is less than 0.1%. After 5000 bending cycles (bending radius R=5mm), the functional layer integrity retention rate of the four-layer composite structure is ≥95%.

[0086] Process parameters: When the temperature is controlled at 180±5℃, the cross-linking reaction degree of the polyurethane film reaches more than 85%, which not only ensures the bonding strength but also avoids the destruction of the structure of Class B substances (tourmaline crystals) caused by high temperature (deactivation temperature>200℃).

[0087] Technological improvements: The existing technology uses room-temperature adhesives and a sewing process, which results in low peel strength (≤3N / cm). However, this invention achieves a peel strength improvement of over 70% through "hot pressing parameter optimization and functional material pre-arrangement," and for the first time, achieves stress-free embedding of rounded rectangular Class B materials.

[0088] Solving industry pain points: To address the industry problem of functional materials falling off after long-term use of health belts, the present invention uses edge masking coating, positioning tooling precision control and stress release structure (sponge hollow design) to increase the product lifespan from 3 months in existing technology to more than 24 months.

[0089] like Figure 12 As shown, the cold press lamination process uses high-pressure roller pressing + low-temperature curing glue to avoid thermal damage (suitable for temperature-sensitive materials). The specific steps are: ①Substrate pretreatment: Plasma cleaning (power 100W, time 30s) of the surface of Class D outer fabric (such as nylon fabric) to improve adhesiveness.

[0090] For Class B materials (such as titanium alloy energy magnets), wipe with ethanol to remove oil.

[0091] ②Low temperature adhesive coating: Type E glue (modified polyurethane low-temperature curing glue or film) is evenly coated on the substrate (glue thickness 0.1mm±0.02mm).

[0092] ③Layer assembly: Stack in the order of "D layer cloth → adhesive layer → B type material → adhesive layer → D layer cloth" (four-layer structure).

[0093] ④High-pressure roll forming: Three-roll press (line pressure 50-100N / mm) cold pressing (temperature 25-40℃), speed 0.5m / min, foaming expansion rate 200%-400%.

[0094] ⑤Curing and shaping: Full curing is achieved by UV irradiation (wavelength 365nm, intensity 80mW / cm²) or by standing at room temperature for 24 hours.

[0095] The innovations of the cold pressing lamination process are: Avoid thermal damage: operate below 40°C to protect temperature-sensitive materials (such as tourmaline ceramics); Energy-saving advantage: Energy consumption is reduced by 60% compared with hot pressing process (actual measured data).

[0096] like Figure 13 As shown in the figure, the 3D printing direct molding process sprays functional materials (such as silver ion glue + graphene powder) layer by layer, eliminating the interlayer bonding step. The specific steps are: ① Digital model construction: Design multi-layer structures (such as gradient density models) based on CAD and export STL files.

[0097] ② Functional material loading: Print head 1: silver ion glue (viscosity 5000cP); Print head 2: graphene powder (particle size ≤ 5 μm).

[0098] ③Layer-by-layer injection molding: First layer: D-type outer cloth base plate fixed; Second layer: silver ion glue is printed according to the path (line width 0.2mm); The third layer: graphene powder electrostatic spraying (density 0.8g / cm³); Repeat with the top layer of fabric, type D.

[0099] ④ In situ fusion: Infrared heating (120°C) allows silver ion glue to penetrate the graphene layer to form an interpenetrating network.

[0100] ⑤ Post-processing: Roll flat (pressure 0.3MPa) and cut off the edge excess.

[0101] The innovations of 3D printing direct molding process are: No glue bonding: the material's own viscosity achieves interlayer bonding; Complex structure support: Can print Class B objects with staggered matrix arrangement (such as hexagonal magnetic disk array).

[0102] Compared with the existing technical solutions, the present invention has the following advantages: Multi-material collaboration: supports any combination of type A substances (e.g. single type A + type B substance: far infrared; multiple type A + type B substances: graphene + negative ions), and the functional superposition effect is increased by 50%+.

[0103] Arrangement innovation: staggered / superimposed arrangement optimizes energy field distribution (such as staggered magnetic disks to avoid magnetic force cancellation).

[0104] Cushioning layer design: EPE / EVA auxiliary interlayer improves impact resistance and increases wearing comfort by 30%.

[0105] Modular combination: select the number of material layers as needed to reduce redundancy (cost reduction of 15%-25%).

[0106] Cross-functional synergy: Graphene thermal conductivity accelerates far-infrared radiation, and magnetic therapy enhances blood circulation (clinically verified).

[0107] Furthermore, the measured data showing a 50%+ improvement in the synergistic effect of multiple materials is as follows: 1. Design principles of measured data 1. Test indicator selection: Core function parameters: Far infrared radiation rate (Standard: GB / T 30127-2013) Negative ion release concentration (Standard: JC / T 1016-2016) Thermal conductivity of graphene (Standard: GB / T 32067-2015) Synergistic effect quantification formula: Synergistic improvement rate = [(measured value of combined material - optimal value of single material) / optimal value of single material] × 100% 2. Experimental groups:

[0108] 3. Test conditions: Temperature: 25±1℃ (simulating human contact environment) Humidity: 50±5% RH Equipment: Far infrared radiation tester (model: PM-200), negative ion detector (COM-3200) 2. Measured Data and Result Analysis 1. Far infrared emissivity comparison (unit: emissivity, %)

[0109] Conclusion: Graphene cloth improves thermal conductivity and enables far-infrared emissivity to exceed the upper limit of a single material.

[0110] 2. Negative ion release concentration (unit: ions / cm³)

[0111] Mechanism: Graphene cloth enhances charge conduction and catalyzes the persistent release of negative ions.

[0112] 3. Comprehensive verification of functional superposition effect Quantification of synergistic effects: The overall efficacy of the experimental group = (radiation rate increased by 7.3% × weight 0.6) + (negative ion increase by 53.7% × weight 0.4) = 50.2% Statistical significance (SPSS 26.0): Independent sample t-test: p=0.002<0.01 (extremely significant difference) Effect size Cohen's d = 1.87 (strong effect) 3. Technical Feasibility Demonstration 1. Material coordination mechanism: Graphene’s catalytic effect: Its high specific surface area (2630 m² / g) and electrical conductivity (5000 S / m) accelerate the ionization reaction of the negative ion cloth; Thermal-electric coupling effect: Far-infrared radiation stimulates graphene electron transitions, enhancing the efficiency of negative ion release.

[0113] 2. Production process stability: Hot pressing process parameters: temperature 150°C, pressure 0.8 MPa, time 30 s; Interlayer bonding strength test: Peel force ≥ 8.5 N / cm (5 N / cm higher than the industry standard), verifying structural reliability.

[0114] 4. Summary of the actual measurement of multi-material collaborative function The experimental group bonded graphene cloth (thickness 0.2mm, square resistance ≤30) and negative ion ceramic sheet (particle size 5μm) using type E glue (polyurethane hot melt adhesive) with hot pressing parameters of 150℃ / 0.8MPa / 30s.

[0115] The measured far-infrared radiation rate is 92.4%, the negative ion release concentration is 3150 ions / cm³, and the overall efficiency is improved by 50.2%.

[0116] Measured data proves that the combination of multiple A substances (such as graphene + negative ions) can achieve a functional superposition improvement of 50%+ through the thermal-electric coupling effect, and the data is statistically significant.

[0117] Furthermore, the present invention also has other combined alternative technical solutions as follows: Solution 1: “Glue-free” ecological solution Structure: D-layer cloth (microporous design) + functional material (B / C type self-adhesive coating) + pressure-activated bonding; Equivalence: Replacing chemical glue through physical adsorption to achieve environmental protection goals.

[0118] Solution 2: “Smart Response” dynamic solution Structure: Shape memory alloy B + temperature-sensitive color-changing C type cloth + circuit layer (instead of Velcro electronic fixation); Equivalence: Functional adaptation is achieved through intelligent material response, going beyond static fit.

[0119] Option 3: “Fully degradable” disposable solution Material: PLA D-layer cloth + starch-based B-material + alginate; Process: Hydrolytic lamination (water-triggered bonding, alternative to heat pressing).

[0120] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in this application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are necessary for each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit this application to being implemented by adopting the above specific details. The above description disclosed is provided to enable any technician in this field to make or use this application. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown here, but to the widest range consistent with the principles and novel features of this application.

[0121] The above is only a preferred embodiment of the invention of this application and is not intended to limit the invention of this application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the invention of this application should be included in the scope of protection of the invention of this application.

[0122] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional composite laminated product, characterized in that: include: The base layer and the functional interlayer are bonded between layers by physical or chemical methods. The base layer is a Class D outer layer cloth or a Class C material cloth. The functional interlayer is a Class B material or a Class C material cloth. The Class B material is a physical property entity made by combining Type A substance with metal, ceramic or organic and inorganic materials. The Class C material cloth is a flexible functional carrier made by combining Type A substance with fiber fabric. The Class C material cloth can be single-layer or multi-layer, and the Class C material cloth can contain the same or different Type A substances.

2. A multifunctional composite laminated product according to claim 1, characterized in that: The substance A includes but is not limited to photothermal, electromagnetic or ion-releasing functional materials, including far infrared rays, tourmaline, negative ions, energy magnets, graphene, silver ions, photonic crystals, liquid metals or rare earth elements.

3. The multifunctional composite laminated product according to claim 1, characterized in that: The shape of the Class B substance can be circular, rectangular, rounded rectangular or mesh structure, and the combination and arrangement of the two or more Class B substances can be a matrix structure, a staggered matrix structure, a staggered arrangement or a superimposed combination. The implantation of the Class B substance can be achieved using a magnetic levitation positioning process.

4. The multifunctional composite laminated product according to claim 1, characterized in that: It also includes an auxiliary interlayer and a reusable mechanical fixing device, wherein the auxiliary interlayer is a chemical composite material, including sponge, aerogel, EPE or EVA, and the auxiliary interlayer can be realized using a foaming in-situ molding process, and the reusable mechanical fixing device can be an F-type material patch, a magnetic buckle or a self-adhesive silicone tape, and the F-type material patch can be a Velcro.

5. The multifunctional composite laminated product according to claim 1, characterized in that: The chemical method is to use E-type glue for bonding, and the E-type glue includes synthetic chemical glue, biological glue or light-curing glue.

6. The multifunctional composite laminated product according to claim 1, characterized in that: The physical method is to use an ultrasonic bonding process or a laser sintering process to achieve multi-layer bonding.

7. A method for manufacturing a multifunctional composite laminated product according to any one of claims 1 to 6, characterized in that: Use hot pressing laminating process, cold pressing laminating process, or 3D printing direct forming process.

8. The method for manufacturing a multifunctional composite laminated product according to claim 7, characterized in that: The steps of the hot pressing forming and laminating process are as follows: S1. Material pretreatment: Pretreatment of Class C fabric: Place the Class C fabric in an environment with a temperature of 25±2°C and a humidity of 40±5% RH for 24 hours to eliminate the internal stress of the fibers; perform plasma treatment on the fabric surface at a power of 50-100W for 10-30 seconds to reduce the surface contact angle to ≤60°, improve the surface hydrophilicity and roughness, and enhance the adhesion to the adhesive layer; Pretreatment of Class B materials: Clean the surface of Class B materials with alcohol ultrasonic cleaning for 10 minutes to remove oil stains and oxidation layers; set the R angle to 0.3-0.5mm and perform edge rounding to avoid stress concentration and interlayer cracking; S2. Structural design and material configuration: Arrangement of Class B materials: Fix Class B materials in a positioning fixture in a matrix structure with a row-column spacing of 0.5-5mm, a staggered matrix structure with adjacent rows and columns offset by 0.2-1mm, or a stacking method with inter-layer staggered stacking of 0.1-0.3mm to form a preset arrangement model; Auxiliary material configuration: Use Class E glue or polyurethane sponge with a density of 10-50kg / m³. The sponge is pre-cut into a hollow structure that matches the Class B material. The hollowing rate is 30%-70% to balance the bonding strength and the air permeability of the functional material. S3, glue layer process: Molding: Pre-cut the E-type adhesive to match the C-type cloth, and hot-press the E-type adhesive onto the C-type cloth. By controlling the temperature at 100-200°C, the pressure at 0.5-5MPa, and the time at 10-60s, a bubble-free, high-strength bond is achieved. Coating: Use screen printing, comma blade coating or spraying technology with a mesh size of 200-400 to evenly coat the surface of the C-type material cloth with the E-type material glue. The thickness of the glue layer is controlled to be 0.1-1mm. Edge protection: Mask the 1-3mm area around the edge of the Class C material cloth to prevent the adhesive layer from overflowing and contaminating the adhesive surface of the reusable mechanical fixing device; S4, hot pressing process: Preheating: Temperature 80-120℃, time 30-60s, evenly heat the materials to be bonded, eliminate wrinkles on the fabric surface, and make the adhesive layer reach 80%-90% of the glass transition temperature; Hot pressing: temperature 150-200℃, pressure 0.5-5MPa, time 10-60s, pressure increasing in stages at a rate of 0.5MPa / s, initial pressure 0.5MPa to expel air from the fabric; final pressure to completely melt the adhesive layer and penetrate the gaps between the fabric fibers; temperature fluctuation ≤±5℃, pressure uniformity error ≤±5%; Pressure-maintaining cooling: Maintain pressure and cool naturally to below 40°C. Continue to apply pressure to prevent shrinkage and deformation during cooling. The cooling rate is controlled at 5-10°C / min to avoid stress concentration in the adhesive layer. S5. Multi-layer composite structure superposition process: Three-layer lamination: After completing the hot pressing of the first layer of Class D outer fabric + Class E adhesive, immediately align the third layer of Class C fabric with the adhesive layer and repeat the hot pressing process to ensure that the inter-layer alignment accuracy is ≤0.5mm; Four-layer lamination with Class B materials: pre-arranged Class B materials are embedded between Class D outer cloth + Class E adhesive + Class C cloth, accurately positioned by a robotic arm, and then coated with Class E adhesive and hot pressed to ensure that the Class B materials are embedded to a depth of 60%-80% of the adhesive layer thickness; Multi-layer composite with sponge: first stack in the order of D outer cloth + E material glue + sponge + B material + E material glue + C material cloth. During hot pressing, control the pressure ≤1.5MPa to avoid excessive compression of the sponge. S6. Post-processing and testing: Demolding and trimming: After cooling, demould the product through a vacuum adsorption device, and use a laser cutting machine to trim the edge burrs ≤ 0.1mm, leaving a 20-50mm width for the mechanical fixture area that can be opened and closed repeatedly; Quality inspection: including appearance inspection, peel strength test and functional stability test.

9. The method for manufacturing a multifunctional composite laminated product according to claim 7, characterized in that: The cold pressing lamination process steps are: S1. Substrate pretreatment: The surface of the outer layer of Class D cloth is plasma cleaned to improve adhesiveness; For Class B materials, use ethanol to wipe and remove oil; S2. Low temperature adhesive coating: Apply type E adhesive evenly to the substrate with a thickness of 0.1mm±0.02mm; S3. Stacking assembly: The four-layer structure is stacked in the order of D-layer cloth → adhesive layer → B-type material → adhesive layer → D-layer cloth; S4, high pressure roll forming: three-roll press line pressure 50-100N / mm, cold pressing temperature 25-40℃, speed 0.5m / min; S5. Curing: UV irradiation, wavelength 365nm, intensity 80mW / cm² or standing at room temperature for 24h to achieve full curing.

10. The method for manufacturing a multifunctional composite laminated product according to claim 7, characterized in that: The 3D printing direct molding process steps are: S1. Digital model construction: Design multi-layer structure based on CAD and export STL file; S2, functional material loading: print head 1 uses silver ion glue; print head 2 uses graphene powder; S3, layer-by-layer injection molding: First layer: D-type outer cloth base plate fixed; The second layer: silver ion glue is printed according to the path; The third layer: graphene powder electrostatic spraying; Repeat to the top layer of Type D fabric; S4, in-situ fusion: infrared heating allows the silver ion glue to penetrate the graphene layer to form an interpenetrating network; S5. Post-processing: rolling to make it smooth and cutting off the edge material.

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