Process for manufacturing a single-component soft adhesive laser aluminum film for building

Abstract

The application provides a manufacturing process of a single-component soft supporting glue laser aluminum film of silica gel for building, and belongs to the technical field of laser aluminum film forming and processing, and specifically comprises the following steps: step 1: base material pretreatment, selecting a printing base material with waterproof or fireproof characteristics, and removing surface impurities; step 2: ink modulation, adjusting the viscosity of water-based UV curing ink to 80-100 cP, the water-based UV curing ink taking water-based polyurethane acrylate and quaternary ammonium salt modified epoxy acrylate as a base resin, adding a nano-coated TPO-L photoinitiator, and achieving 2-5 seconds of instantaneous curing through ultraviolet irradiation. The application can effectively solve the technical problems in the prior art, such as long curing time, difficulty in meeting the high-speed production demand, and insufficient combination of ink and base material, and can also effectively solve the technical problems of pattern blurring and falling off, realize intelligent control of the production process, and improve the consistency of product quality and production efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser aluminum film, and particularly relates to a manufacturing process of a silicon-gel single-component soft-branch adhesive laser aluminum film for buildings. BACKGROUND

[0002] The aluminum plastic film can ensure that the humidity in the packaging bag is lower than 40 RH, and the moisture-proof effect is 80 times that of ordinary polyethylene. Various specifications, sizes and material composite films can be selected, and the composite film has good protection performance, such as oxygen resistance, moisture resistance, puncture resistance, high strength, high toughness, one-way or two-way air permeability, ultraviolet resistance, chemical resistance and the like, and is widely applied to the packaging of various products.

[0003] The application patent with the publication number CN113103714A discloses a production process of a silicon-gel single-component soft-branch adhesive aluminum film with a laser effect for buildings, a printing base material is selected according to customer needs; a laser pattern is transferred to the printing base material raw material through a mold pressing machine to achieve the laser effect required by the customer; a pattern required by the customer is printed according to the customer's needs; the printed laser film is compounded with a PET / PA / AL / BOPP structure through a compounding machine, and then the compounded film is pushed into a curing chamber for curing; the cured film is taken out and cooled to room temperature, and then cutting and packaging are performed according to the required size of the customer.

[0004] The above scheme realizes the laser effect through processes such as mold pressing and compounding, but still has the following disadvantages:

[0005] Firstly, ordinary ink is used, the curing time is long, the high-speed production demand cannot be met, and the adhesion between the ink and the base material is insufficient, and problems such as pattern blurring and falling off are prone to occur;

[0006] Secondly, the compounding structure is single, and a simple PET / AL / BOPP combination is usually used, the adhesive performance is ordinary, the interlayer peeling strength of the compounded layer is low, the heat sealing performance is unstable, and the film is prone to breakage and glue explosion during use.

[0007] Thirdly, the temperature, time and other parameters of the mold pressing and curing processes cannot be dynamically adjusted, rely on manual experience, the product quality stability is poor, and different base materials and process requirements cannot be met. SUMMARY

[0008] The application aims to provide a manufacturing process of a silicon-gel single-component soft-branch adhesive laser aluminum film for buildings, which can effectively solve the technical problems in the prior art that ordinary ink is used, the curing time is long, the high-speed production demand cannot be met, and the adhesion between the ink and the base material is insufficient, and problems such as pattern blurring and falling off are prone to occur, and simultaneously realizes intelligent control of the production process and improves the consistency of product quality and production efficiency.

[0009] To solve the above technical problems, the technical scheme adopted by the application is:

[0010] The application discloses a manufacturing process of a single-component soft-branch adhesive laser aluminum film for building silicon rubber, and particularly relates to the following steps.

[0011] Step 1: substrate pretreatment, selecting a printing substrate with waterproof or fireproof properties and removing surface impurities;

[0012] Step 2: ink modulation, adjusting the viscosity of water-based UV curing ink to 80-100 cP, wherein the water-based UV curing ink is based on water-based polyurethane acrylate and quaternary ammonium salt modified epoxy acrylate, and a nano-coated TPO-L photoinitiator is added, and 2-5 seconds of instantaneous curing is achieved through ultraviolet irradiation;

[0013] Step 3: mold forming, mold pressing the substrate at a temperature of 90-100 DEG C;

[0014] Step 4: composite treatment, adopting a multi-layer composite structure composed of a PET layer, a temperature-sensitive ink layer, a PA layer, an AL layer and a BOPP layer, and one or more layers of composite can be selected as needed;

[0015] Step 5: curing treatment, curing at an environment of 50-60 DEG C for 70-75 hours.

[0016] Further, in step 3, the mold forming adopts a hot pressing process, and a pressure of 0.5-1.5 MPa is applied by a pressure roller to make the ink fully combined with the substrate.

[0017] Further, in step 4, the composite treatment adopts an extrusion composite process, and a molten polymer is extruded through a die head to form a film layer, and is combined with other layers under pressure.

[0018] Further, in step 4, the composite treatment adopts a dry composite process, and a UV-thermal dual-curing composite adhesive is used, the adhesive is composed of 55-65% of epoxy modified polyurethane prepolymer, 3-5% of cationic photoinitiator I-250, 8-12% of nano kaolin and 24-28% of deionized water, and is first subjected to ultraviolet pre-curing, and then is cured at an environment of 45-55 DEG C for 22-26 hours.

[0019] Further, an AI-driven mold curing closed-loop control system is adopted, light transmittance and light sensitivity of the laser layer are monitored in real time through a spectrum sensor, mold pressing temperature and curing time are dynamically adjusted based on a reinforcement learning algorithm, mold pressing temperature is ±2, and curing time is ±1 hour;

[0020] The control system comprises a data acquisition module, a decision module and an execution module,

[0021] The data acquisition module is used for collecting the bright spot transmittance, light sensitivity, current molding temperature, current setting curing time, the change rate of the bright spot transmittance measured for the last three times, and the change rate of the light sensitivity measured for the last three times of the laser film;

[0022] The decision module adopts an Actor-Critic reinforcement learning framework,

[0023] State space:

[0024] ;

[0025] Action space ;

[0026] Reward function ;

[0027] : represents the current molding temperature;

[0028] : indicates the current setting curing time;

[0029] : refers to the current measured bright spot transmittance;

[0030] : indicates the current measured light sensitivity;

[0031] : is the change rate of the bright spot transmittance measured for the last three times;

[0032] : is the change rate of the light sensitivity measured for the last three times;

[0033] : represents the molding temperature adjustment amount;

[0034] : indicates the curing time adjustment amount;

[0035] , , , are all weight coefficients;

[0036] : is a reward value calculated based on the bright spot transmittance ;

[0037] : is a reward value calculated based on the light sensitivity ;

[0038] The execution module includes a PID controller for accurately controlling the molding temperature and a programmable logic controller (PLC) for regulating the curing chamber time.

[0039] Further, a release agent coating with a thickness of 50-100 nm is additionally arranged between the PET / AL layers, the release agent coating is uniformly applied by a coating process, so that the outer laser film can be torn off to expose the inner pre-printed two-dimensional code or anti-counterfeit code, while the barrier property of the AL layer is retained.

[0040] Further, a conductive silver paste line with a line width of 0.04-0.1 mm is formed on the BOPP layer by a laser etching process, and is misaligned and superimposed with the laser layer during compounding to form a bendable RFID tag antenna, so that the chipless RFID communication is realized, and the communication distance is greater than or equal to 1 m.

[0041] Further, in the compounding process of step 4, a multilayer composite structure further includes a 1-3 μm thick water-based polyurethane isolation layer arranged between the PET layer and the temperature-sensitive ink layer, and a 4-6 μm thick UV curing transparent protective varnish layer added with nano-SiO2 arranged on the outer side of the temperature-sensitive ink layer, and the water-based polyurethane isolation layer and the UV curing transparent protective varnish layer are formed by a coating process.

[0042] Further, in the maturation process of step 5, a segmented temperature control is adopted, first maturing at 50-55℃ for 40-45 hours, and then increasing the temperature to 55-60℃ for 30-35 hours, so that the adhesive is fully cured.

[0043] Compared with the prior art, the present application has the following beneficial effects:

[0044] The water-based UV ink instant curing of the present application improves the production efficiency, the intelligent mold pressing control ensures the stability of the laser effect, the optimization of the composite structure improves the basic performance such as heat sealing strength and barrier property, and solves the problem that the laser effect and heat sealing property are difficult to be considered in the prior art; at the same time, the setting of the release agent coating and the RFID antenna in the present application makes the product have the functions of anti-counterfeiting and intelligent identification, meets the informatization demand of building materials in anti-counterfeiting traceability and construction management, fills the functional gap of the prior art; more importantly, the AI closed-loop control system of the present application realizes the dynamic adjustment of the process parameters, reduces the manual intervention, improves the production automation degree and product consistency, and reduces the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and other related drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0046] Figure 1 It is the overall process flow chart of the present application. DETAILED DESCRIPTION

[0047] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting. The following Figure 1 Embodiments of the present application are described in detail.

[0048] Embodiment 1: This embodiment discloses a manufacturing process of a single-component soft adhesive laser aluminum film for building silicone, specifically comprising the following steps:

[0049] Step 1: substrate pretreatment, selecting a printing substrate with waterproof or fireproof properties and removing surface impurities;

[0050] Step 2: ink modulation, adjusting the viscosity of the water-based UV curing ink to 80-100 cP,

[0051] The ink uses 58% water-based polyurethane acrylate and 28% quaternary ammonium salt modified epoxy acrylate as the base resin, adds 8% nano-coated TPO-L photoinitiator, and achieves 5-second instantaneous curing through 800 mJ / cm² ultraviolet irradiation;

[0052] In this embodiment, the water-based UV curing ink is diluted to 90 cP; in some preferred embodiments, the viscosity of the water-based UV curing ink can also be adjusted to 80 cP, 85 cP, 90 cP, 95 cP, or 98 cP.

[0053] Step 3: mold forming, mold pressing the substrate at a temperature of 90-100°C; in this embodiment, the preferred temperature is 95°C. In some alternative embodiments, the temperature during mold forming is 90°C, 92°C, 98°C, or 100°C.

[0054] Step 4: composite treatment, using a multi-layer composite structure composed of a PET layer, a temperature-sensitive ink layer, a PA layer, an AL layer, and a BOPP layer, one or more layers of composite can be selected as needed.

[0055] In this embodiment, the four-layer composite structure is composed of an 11 μm PET layer, a 14 μm PA layer, a 6 μm AL layer, and an 18 μm BOPP layer.

[0056] In some specific embodiments, the number of layers can be selected for compounding according to actual needs.

[0057] Step 5: curing treatment, curing at an environment of 50-60°C for 70-75 hours; in this embodiment, the preferred temperature is 55°C and the preferred curing time is 73 hours.

[0058] In some preferred embodiments,

[0059] The maturation process can be carried out at 50°C for 75 hours or at 60°C for 70 hours.

[0060] The present application solves the problem of contradiction between laser effect and functional performance in the prior art by the instantaneous curing characteristics of the water-based UV curing ink, the curing time of 5 seconds, the improved curing efficiency compared with traditional inks, the shortened production cycle, the selection of waterproof or fireproof substrates and multi-layer composite structure, the realization of laser effect, and the guarantee of the barrier property, heat sealing property and other basic properties of the aluminum film.

[0061] Further, in some preferred embodiments, in step 3, the mold forming adopts a hot pressing process, and a pressure of 0.5-1.5 MPa is applied by a pressure roller to make the ink fully combined with the substrate. In the present embodiment, the pressure is preferably 1 MPa.

[0062] In some preferred embodiments, the pressure is 0.5 MPa or 1.5 MPa.

[0063] By applying a pressure of 1 MPa by the pressure roller, the water-based UV ink is fully contacted with the surface molecules of the substrate, the bonding strength is improved, and the problems of blurred and falling laser patterns caused by insufficient pressure in the prior art are avoided.

[0064] Further, in some preferred embodiments, in step 4, the composite process adopts an extrusion composite process, and a molten polymer is extruded through a die head to form a film layer, which is then combined with other layers under pressure. The molten polymer is extruded through the die head and then synchronously pressed with each layer, and the thickness tolerance of the composite layer is ≤±2 μm. According to actual tests, the uniformity is improved by 30% compared with traditional dry composite, the interlayer peeling strength is ≥5 N / 15 mm, and the delamination phenomenon in use is effectively prevented.

[0065] Further, in step 4, the composite process adopts a dry composite process, and a UV-thermal dual-curing composite adhesive is used, which is composed of 60% epoxy modified polyurethane prepolymer, 4% cationic photoinitiator I-250, 10% nano kaolin and 26% deionized water. The adhesive is first pre-cured by ultraviolet light and then matured at 50°C for 24 hours. The UV pre-curing realizes the preliminary setting of the adhesive (curing degree ≥60%), and the full curing is completed after 24 hours of maturation at 50°C. Compared with single thermal curing, the curing time is shortened, and the cohesive force of the adhesive layer is improved. According to tests, the cohesive force of the adhesive layer is 32 MPa, the high and low temperature resistance (-40°C to 80°C) is stable, and the problems of slow curing and poor weather resistance of the adhesive in the prior art are solved.

[0066] In some preferred embodiments, the adhesive is composed of 55% epoxy modified polyurethane prepolymer, 3% cationic photoinitiator I-250, 8% nano kaolin and 24% deionized water, and is first pre-cured by ultraviolet light and then cured for 26 hours at 45°C.

[0067] Further, in some preferred embodiments, the adhesive is composed of 65% epoxy modified polyurethane prepolymer, 5% cationic photoinitiator I-250, 12% nano kaolin and 28% deionized water, and is first pre-cured by ultraviolet light and then cured for 22 hours at 55°C.

[0068] Among them, AI-driven mold curing closed-loop control system is adopted, the light transmittance and photosensitivity of the laser layer are monitored in real time by the spectral sensor, the mold temperature and curing time are dynamically adjusted based on the reinforcement learning algorithm, the mold temperature is ±2, and the curing time is ±1 hour;

[0069] The control system includes a data acquisition module, a decision module and an execution module,

[0070] The data acquisition module is used to collect the bright point transmittance, photosensitivity, current mold temperature, current set curing time, recent three times of measured bright point transmittance change rate and recent three times of measured photosensitivity change rate of the laser film;

[0071] The decision module adopts an Actor-Critic reinforcement learning framework,

[0072] State space:

[0073] ;

[0074] Action space ;

[0075] Reward function ;

[0076] : represents the current mold temperature;

[0077] : indicates the current set curing time;

[0078] : refers to the current measured bright point transmittance;

[0079] : indicates the current measured photosensitivity;

[0080] : is the recent three times of measured bright point transmittance change rate;

[0081] : is the recent three times of measured photosensitivity change rate;

[0082] : represents the adjustment amount of the mold temperature;

[0083] : represents the adjustment amount of the curing time;

[0084] , , , are weight coefficients;

[0085] : is a reward value calculated based on the light transmittance of the bright spot;

[0086] : is a reward value calculated based on the light sensitivity;

[0087] The execution module includes a PID controller for accurately controlling the mold temperature and a programmable logic controller (PLC) for regulating the curing chamber time.

[0088] The light transmittance and light sensitivity are monitored in real time by the spectral sensor at a sampling frequency of 10 times per second. The mold temperature and curing time are dynamically adjusted based on the reinforcement learning algorithm. Tests show that the optical performance fluctuation of the laser layer is ≤5%, and the waste rate is reduced by 60% compared to manual experience control.

[0089] Further, in some preferred embodiments, a release agent coating with a thickness of 50-100 nm is additionally provided between the PET / AL layers. The release agent coating is uniformly applied by a coating process, so that the outer laser film can be torn off to expose the inner pre-printed two-dimensional code or anti-counterfeit code, while the barrier property of the AL layer is retained. The release agent coating allows the outer laser film to be torn off to expose the inner two-dimensional code and anti-counterfeit code, achieving visual anti-counterfeiting, and combining the barrier property of the AL layer (oxygen transmittance <0.5 cm 3 / (m 2 ·24h·0.1MPa), which not only meets the packaging anti-counterfeiting needs, but also does not affect the moisture-proof and oxygen barrier function of the aluminum film.

[0090] In the present embodiment, the thickness of the release agent coating is 80 nm.

[0091] In some preferred embodiments, the thickness of the release agent coating can also be 50 nm, 60 nm, 70 nm, 90 nm, or 100 nm.

[0092] ​​Further, in some preferred embodiments, a conductive silver paste line with a line width of 0.1 mm is formed on the BOPP layer by a laser etching process, and is superimposed with the laser layer in a staggered manner during compounding to form a bendable RFID tag antenna, realizing chipless RFID communication with a communication distance of ≥1 m, which has been tested to be 1.1 m. The chipless RFID antenna realizes a communication distance of ≥1 m, can store material batch, performance parameter and other information, and realizes traceability management and construction progress tracking of building materials through handheld device reading, solving the problems of low efficiency and easy error of traditional manual recording.

[0093] In the present embodiment, the laser-etched silver paste line has a line width of 0.1 mm and can bend (with a radius of curvature ≥5 mm) without breaking, which is suitable for complex construction scenarios of building materials and has a service life synchronized with that of aluminum film.

[0094] In some preferred embodiments, the conductive silver paste line has a line width of 0.08 mm, 0.06 mm or 0.04 mm. Further, in some preferred embodiments, in the compounding process of step 4, a 2 μm thick water-based polyurethane isolation layer is arranged between the PET layer and the temperature-sensitive ink layer, and a 5 μm thick UV-cured transparent protective varnish layer added with nano-SiO2 is arranged on the outer side of the temperature-sensitive ink layer, which are formed by a coating process. The 2 μm thick water-based polyurethane isolation layer can prevent chemical migration of the temperature-sensitive ink and the PET layer, ensuring color stability. The 5 μm thick UV varnish layer containing nano-SiO2 has a surface hardness of 3H, an abrasion resistance improved by 50%, and an ultraviolet aging resistance time extended to more than 1000 hours, which is suitable for outdoor scenes such as building facades.

[0095] In some preferred embodiments, the water-based polyurethane isolation layer has a thickness of 1 μm, and the UV-cured transparent protective varnish layer has a thickness of 4 μm.

[0096] In some preferred embodiments, the water-based polyurethane isolation layer has a thickness of 3 μm, and the UV-cured transparent protective varnish layer has a thickness of 6 μm.

[0097] Further, in some preferred embodiments, in the curing process of step 5, a segmented temperature control is adopted, i.e., first curing at 53°C for 43 hours, and then increasing the temperature to 58°C for 33 hours to fully cure the adhesive. The test shows that the curing degree of the adhesive layer is improved from 85% to 98% compared with constant temperature curing, and the peel strength fluctuation is ≤±0.5 N / 15 mm, avoiding the problems of adhesive explosion and delamination caused by insufficient local curing.

[0098] In some preferred embodiments, the adhesive is first cured at 50°C for 45 hours, and then increased to 55°C for 35 hours to fully cure the adhesive.

[0099] In some preferred embodiments, the adhesive is fully cured by first aging at 55°C for 40 hours and then increasing the temperature to 60°C for 30 hours.

[0100] Step 1: Substrate pretreatment, select a 200 μm thick BOPP printing substrate with waterproof properties, remove surface impurities by corona treatment to achieve a surface tension of 42 dynes / cm.

[0101] Step 2: Ink modulation, dilute the water-based UV curing ink to 90 cP, the ink uses 60% water-based polyurethane acrylate and 30% quaternary ammonium salt modified epoxy acrylate as the base resin, and adds 10% nano-coated TPO-L photoinitiator. Through 800 mJ / cm² ultraviolet irradiation, the ink is instantaneously cured within 3 seconds.

[0102] Step 3: Molding, using a hot pressing process, apply 1.0 MPa pressure through a pressure roller at a temperature of 95°C to fully combine the ink and substrate, forming a laser pattern.

[0103] Step 4: Composite processing, using an extrusion composite process, sequentially composite PET layer (12 μm), PA layer (15 μm), AL layer (7 μm), and BOPP layer (20 μm). The molten polyethylene is extruded through a die to form a 10 μm thick film layer, which is combined with each layer under a pressure of 0.8 MPa.

[0104] Step 5: Aging treatment, age at 55°C for 72 hours to fully cure the adhesive and form the final product.

[0105] The base adhesive in this example is an epoxy-modified polyurethane, which has a peel strength 40% higher than traditional formulations.

[0106] Example 3: This example is basically the same as Example 2, except that in this example, steps 3 and 5 use an AI-driven molding and aging closed-loop control system:

[0107] Data acquisition module, real-time acquisition of laser film highlight transmittance target value 92%, light sensitivity target value 85 cd / m², current molding temperature 95°C, current set aging time 72 hours, recent three times of highlight transmittance change rate +0.5% / h, and recent three times of light sensitivity change rate -0.3% / h.

[0108] Wherein, the weight coefficients w1-w4 are determined by historical data training, and the typical values are w1=0.6, w2=0.4, w3=0.1, w4=0.1.

[0109] The decision module adopts the Actor-Critic reinforcement learning framework:

[0110] The state space {95℃, 72h, 91.8%, 85.2cd / m², +0.5% / h, -0.3% / h}, and the action space adjusts the molding temperature +1℃ and the curing time -0.5h;

[0111] The reward function:

[0112] ;

[0113] ;

[0114] ;

[0115] .

[0116] The execution module adjusts the molding temperature to 96℃ through the PID controller, and the curing time to 71.5h through the PLC. The final product has a luminance of 84.9cd / m², and the luminance transmittance is improved from 91.0% to 92.3% after adjustment.

[0117] Wherein, the model converges after 10000 rounds of training, and the loss function is <0.01; the change rate ΔL is calculated per minute.

[0118] In this embodiment, a 75nm thick organic silicon release agent coating is added between the PET / AL layers in step 4, which is uniformly applied by a micro-gravure coating process.

[0119] Wherein, the release agent is an organic silicon resin, which forms a microporous structure after coating, and the pore size is measured by scanning electron microscopy (SEM) at an accelerating voltage of 5kV, with a pore size ≤5nm, ensuring that the oxygen transmission rate is <0.5cm 3 / (m 2 ·24h·0.1MPa); the outer laser film can be completely torn off, exposing the pre-printed two-dimensional code on the inner layer, and the AL layer remains unchanged, with an oxygen transmission rate <0.5cm 3 / (m 2 ·24h·0.1MPa).

[0120] Example 5, this implementation is further optimized on the basis of example 2, in the embodiment, the conductive silver paste line with a line width of 0.08 mm is formed on the BOPP layer by a laser etching process in step 4, the RFID antenna adopts a dipole design, the resonant frequency is 13.56 MHz, and the square resistance of the silver paste is ≤3 Ω / sq. The circuit pattern is misaligned and overlaid with the laser layer to form a dipole antenna structure, realizing chipless RFID communication, and the actual measured communication distance is 1.2 m.

[0121] Example 6, this implementation is further optimized on the basis of example 2, in the composite treatment of step 4:

[0122] A 2 μm thick water-based polyurethane isolation layer is added between the PET layer and the temperature-sensitive ink layer, and is formed by a comma doctor blade coating process;

[0123] A 5 μm thick UV-cured transparent protective varnish layer with 5% nano-SiO2 is added outside the temperature-sensitive ink layer, and is formed by a roll coating process; the final product has a rubbing resistance of >1000 times (500g load), a color difference ΔE of <1.5 after weather resistance test (QUV 500h), and a VOC value of 8 g / m².

[0124] Among them, the protective varnish layer adopts a solvent-free UV curing system.

[0125] Example 7, this implementation is further optimized on the basis of example 2, step 5 adopts segmented temperature control:

[0126] First stage: curing for 42 hours at 52°C environment;

[0127] Second stage: heating to 58°C for 32 hours;

[0128] DSC analysis shows that the curing degree of the adhesive reaches 98.5%, and the product peeling strength reaches 3.2 N / 15 mm, which is better than 2.8 N / 15 mm of example 2.

[0129] Example 8, the traditional laser layer is prone to microcracks when the building aluminum film is exposed to ultraviolet light, temperature difference and humidity environment for a long time, resulting in optical performance degradation and light sensitivity decrease of >30%, and the maintenance cost is extremely high; therefore, based on example 1, in step 2 of the embodiment, the water-based UV-cured ink contains a base resin, a photoinitiator and a self-repairing agent, wherein the water-based polyurethane acrylate (containing furan groups) is 40-50%, the quaternary ammonium salt modified epoxy acrylate is 30-40%, the nano-coated TPO-L is 5-8%, and the nano-encapsulated dicyclopentadiene is 0.5-1.0 wt%.

[0130] In the water-based UV ink, 0.5-1.0wt% of the nano-capsulated repairing agent is added, the capsule core is dicyclopentadiene DCPD, the capsule wall is a double-layer structure of silicon dioxide and polyurea, the particle size is 200-500nm, 5% of the water-based polyurethane acrylate containing furan groups is introduced into the base resin as a Diels-Alder reaction acceptor, under ultraviolet or natural light irradiation, the dicyclopentadiene is released and reacts with the furan groups through Diels-Alder reaction, and cracks in the film layer are repaired.

[0131] In the present embodiment, the water-based polyurethane acrylate (containing furan groups) is 45%, the quaternary ammonium salt modified epoxy acrylate is 35%, the nano-coated TPO-L is 6.5%, the nano-capsulated dicyclopentadiene is 0.8wt%, and the balance is deionized water / auxiliaries, and the viscosity is adjusted to 90±5cP at 25°C.

[0132] In some embodiments, the water-based polyurethane acrylate (containing furan groups) is 40%, the quaternary ammonium salt modified epoxy acrylate is 30%, the nano-coated TPO-L is 5%, and the nano-capsulated dicyclopentadiene is 0.5wt%.

[0133] In some embodiments, the water-based polyurethane acrylate (containing furan groups) is 50%, the quaternary ammonium salt modified epoxy acrylate is 40%, the nano-coated TPO-L is 8%, and the nano-capsulated dicyclopentadiene is 1.0wt%.

[0134] The specific performance data of the present embodiment are compared as follows:

[0135]

[0136] In the present embodiment, the light sensitivity is improved by 38%, and still maintains 94% light sensitivity after severe QUV aging, breaking through the life limit of traditional materials. The 5μm level crack is repaired by 92%, which can solve the problem of optical performance decay from the root. At the same time, through the design of nano-capsule particle size control (250nm) and capsule wall optical matching, the light transmission loss is compressed to <0.5%. Through the synergistic design of DCPD nano-capsule and furan group resin in the present embodiment, the self-repairing rate is >90% under the condition of light transmittance reduction <0.5%, breaking through the life bottleneck of outdoor laser aluminum film.

[0137] In the specific implementation, the aluminum film is required to be bent with a radius of ≤10cm for building curved surfaces (such as arched roofs, cylindrical structures), but the resistance of the traditional etched antenna rises by >200% after being bent 5 times, resulting in RFID communication failure; therefore, in actual application, the conductive silver paste circuit is a fractal grid topology, the line width is ≤80nm, liquid metal droplets are embedded between the circuits, and a 200nm thick TPU buffer layer is arranged between the BOPP layer and the silver paste circuit.

[0138] The silver paste line is changed to a fractal grid topology, such as a Hilbert curve, with electron beam etching line width compression to 80 nm, and a 200 nm thick thermoplastic polyurethane (TPU) buffer layer is added between the BOPP layer and the silver paste, with a storage modulus of 0.1-0.5 GPa, and liquid metal droplets, such as GaInSn alloy, are embedded at the antenna nodes, with a diameter of 20 μm, and when bent, the liquid metal flows to reconfigure the conductive path.

[0139] After testing, the results are as follows:

[0140]

[0141] This embodiment uses fractal topology and liquid metal dynamic connection to achieve super-bending stability, with a curvature radius of ≥3 cm; at the same time, 80 nm line width breaks through the limit of laser etching, and the antenna density is increased by 5 times, breaking through the bending failure limit.

[0142] Comparative Example 1: Based on Example 2, Step 2 uses a solvent-based UV ink (viscosity 120 cP) without nano-coated TPO-L photoinitiator; the curing time needs 8 seconds, VOC emission is 35 g / m², ink adhesion is 3B, and Example 2 is 5B.

[0143] Comparative Example 2: Based on Example 2, without AI control process, Step 3 and Step 5 use fixed parameters of 95°C for 72 hours; the product bright point transmittance fluctuation range is ±1.2%, Example 3 is ±0.3%, and the light sensitivity fluctuation range is ±1.5 cd / m², Example 3 is ±0.5 cd / m².

[0144] Comparative Example 3: Based on Example 2, using a non-release agent structure, Step 4 does not set a release agent coating, resulting in the laser film being unable to be completely torn off, damaging the AL layer, and the oxygen transmission rate rising to 8 cm 3 / (m 2 ·24h·0.1MPa).

[0145] Comparative Example 4: Based on Example 2, using a single-stage curing process, continuously curing at 60°C for 72 hours in Step 5, the adhesive curing degree is 95.2%, the product appears to shrink and deform, with a flatness deviation of 0.3 mm, and Example 7 is 0.05 mm.

[0146] The effect comparison results of Examples 2-7 are as follows:

[0147]

[0148] The effect comparison results of Comparative Examples 1-4 are as follows:

[0149]

[0150] According to the embodiment 3 and the comparative example 2, the product optical performance stability is improved by 4 times through dynamic adjustment of process parameters by reinforcement learning, which is significantly better than the traditional fixed parameter control mode.

[0151] According to the embodiment 4 and the comparative example 3, the peelable function is realized while maintaining the barrier property of the aluminum layer, solving the technical contradiction in the traditional structure that peeling destroys the aluminum layer.

[0152] According to the embodiment 7 and the comparative example 4, the curing degree is improved by 3.3% through gradient temperature control, and the high temperature deformation problem is eliminated, and the product flatness is improved by 6 times.

[0153] In the embodiment 5, the chipless RFID communication on the soft packaging material is realized through the precise etching and staggered lamination process, and the communication distance breaks through 1m.

[0154] According to the embodiment 2 and the comparative example 1, the curing speed is improved by 62.5% and the VOC emission is reduced by 85.7% by combining the nano-coated TPO-L photoinitiator with the water-based system.

[0155] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to include all changes and modifications falling within the scope of the present application.

[0156] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. It should be pointed out that any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A manufacturing process of a single-component soft adhesive laser aluminum film for architectural silicone, characterized by, Specifically comprising the following steps: Step 1: substrate pretreatment, selecting a printing substrate with waterproof or fireproof properties and removing surface impurities; Step 2: ink modulation, adjusting the viscosity of the water-based UV curing ink to 80-100 cP, the water-based UV curing ink using water-based polyurethane acrylate and quaternary ammonium salt modified epoxy acrylate as the base resin, adding nano-coated TPO-L photoinitiator, and achieving 2-5 seconds of instantaneous curing through ultraviolet irradiation; Step 3: mold forming, mold pressing the substrate at a temperature of 90-100℃; Step 4: composite treatment, using a multi-layer composite structure composed of a PET layer, a temperature-sensitive ink layer, a PA layer, an AL layer, and a BOPP layer, and selecting one or more layers of composite as needed; The composite treatment uses a dry composite process and uses a UV-thermal dual-curing composite adhesive composed of 55-65% epoxy-modified polyurethane prepolymer, 3-5% cationic photoinitiator I-250, 8-12% nano kaolin, and 24-28% deionized water. First, it is pre-cured by ultraviolet light, and then it is cured for 22-26 hours at an environment of 45-55℃. Step 5: curing treatment, curing for 70-75 hours at an environment of 50-60℃; A release agent coating with a thickness of 50-100 nm is added between the PET / AL layers, the release agent coating is uniformly applied by coating process, the outer laser film can be torn off, exposing the inner pre-printed two-dimensional code or anti-counterfeit code, while retaining the barrier property of the AL layer.

2. The manufacturing process of a single-component soft adhesive laser aluminum film for building silicone rubber according to claim 1, characterized in that: In step 3, the mold forming uses a hot pressing process, applying a pressure of 0.5-1.5 MPa through a pressure roller to fully combine the ink and the substrate.

3. The manufacturing process of a single-component soft adhesive laser aluminum film for building silicone rubber according to claim 1, characterized in that: In step 4, the composite treatment uses an extrusion composite process, the molten polymer is extruded through a die to form a film layer, and is combined with other layers under pressure.

4. The manufacturing process of a single-component soft adhesive laser aluminum film for building silicone rubber according to claim 1, characterized in that: A conductive silver paste line with a line width of 0.04-0.1 mm is formed on the BOPP layer by laser etching process, which is misaligned and overlaid with the laser layer during composite, forming a bendable RFID tag antenna, realizing chipless RFID communication, and the communication distance is ≥1 m.

5. The manufacturing process of a single-component soft adhesive laser aluminum film for building silicone rubber according to claim 1, characterized in that: In the composite treatment of step 4, the multi-layer composite structure also includes a 1-3 μm thick water-based polyurethane isolation layer between the PET layer and the temperature-sensitive ink layer, and a 4-6 μm thick UV curing transparent protective varnish layer added with nano-SiO2 on the outer side of the temperature-sensitive ink layer. The water-based polyurethane isolation layer and the UV curing transparent protective varnish layer are formed by coating process.

6. The manufacturing process of a single-component soft adhesive laser aluminum film for building silicone rubber according to any one of claims 1-5, characterized in that: In the curing treatment of step 5, a segmented temperature control is used, first curing for 40-45 hours at an environment of 50-55℃, then increasing the temperature to 55-60℃ for 30-35 hours, so that the adhesive is fully cured.

7. The manufacturing process of a single-component soft adhesive laser aluminum film for building silicone rubber according to claim 1, characterized in that, The water-based UV curing ink in step 2 also contains 0.5-1.0 wt% of nano-encapsulated dicyclopentadiene, and the water-based polyurethane acrylate in the base resin contains furan groups; the core of the nano-encapsulated dicyclopentadiene is dicyclopentadiene, the capsule wall is a double-layer structure of silicon dioxide and polyurea, and the particle size is 200-500 nm.

8. The manufacturing process of a single-component soft adhesive laser aluminum film for building silicone rubber according to claim 6, characterized in that, The conductive silver paste line is a fractal grid topology, and the line width is less than or equal to 80 nm; a thermoplastic polyurethane buffer layer with a thickness of 200 nm is arranged between the BOPP layer and the conductive silver paste line; and a liquid metal microdroplet is embedded at a node of the conductive silver paste line.

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