CN117603632B - Preparation method of adhesive tape containing UV tackifying glue - Google Patents

Preparation method of adhesive tape containing UV tackifying glue Download PDF

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Publication number
CN117603632B
CN117603632B CN202410089338.2A CN202410089338A CN117603632B CN 117603632 B CN117603632 B CN 117603632B CN 202410089338 A CN202410089338 A CN 202410089338A CN 117603632 B CN117603632 B CN 117603632B
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real
time
glue
tackifying
standard
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CN117603632A (en
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孙攀
张霄
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Shanghai Jingshen New Material Co ltd
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Shanghai Jingshen New Material Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
    • C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/4133—Refractometers, e.g. differential
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2433/00—Presence of (meth)acrylic polymer

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention relates to the technical field of tackifying tapes, in particular to a preparation method of an adhesive tape containing UV tackifying glue, which comprises the following steps of S1, a glue mixing process; step S2, defoaming and coating processes; step S3, a drying procedure; and S4, curing. The invention combines the image recognition technology to carry out vacuumizing treatment on the glue solution formed by mixing, and simultaneously carries out detection analysis on the floating bubbles, so as to ensure the accuracy of vacuumizing conditions, so as to form the tackifying glue solution, and transfer the tackifying glue solution into a coating mixer in coating equipment, carry out a coating procedure, and in the coating process, periodically detect the tackifying glue film so as to determine whether to further determine the bubble distribution result according to the real-time refractive index according to the current detection result, analyze the coating effect according to the bubble distribution result, adaptively regulate and control coating parameters according to the detection data of the current period, improve the coating efficiency, ensure the coating quality, and further ensure the adhesive tape quality.

Description

Preparation method of adhesive tape containing UV tackifying glue
Technical Field
The invention relates to the technical field of tackifying tapes, in particular to a preparation method of an adhesive tape containing UV tackifying glue.
Background
The part of the adhesive tape has high viscosity, good fitting wettability and reworkability requirements in the use process, and the high viscosity means poor reworkability; the current viable proposal is to use various tackifying adhesive tapes, such as thermal tackifying, UV tackifying and the like, which are characterized by lower initial tackiness, good reworking performance, strong tackiness after tackifying and strong adhesive force; the tackifying adhesive tape is prepared by coating tackifying adhesive water on the surface of a substrate to replace the solid-gas interface of the original substrate, and drying, pressing quinone and curing.
Chinese patent publication No.: CN116218423a discloses a UV tackifying agent and a preparation method thereof, the technical points are that a substrate layer and a glue layer arranged on one side of the substrate layer are prepared; therefore, in the existing adhesive-increasing tape preparation process, the quality of an adhesive film formed after coating to a substrate is lacked in real time, and when the fluctuation of the film thickness is obvious, the running state of coating equipment is automatically and accurately regulated, so that the labor is saved, the coating efficiency is improved, and the quality of the adhesive tape formed by smoothly coating the adhesive onto the substrate is ensured.
Disclosure of Invention
Therefore, the invention provides a preparation method of an adhesive tape containing UV tackifying glue, which is used for solving the problem that the quality of the prepared adhesive tape is low because the stability of mixed glue is difficult to ensure due to the lack of periodical detection of a glue coating process in the prior art.
In order to achieve the above object, the present invention provides a method for preparing an adhesive tape containing UV tackifying glue, comprising,
adding acrylic resin into a glue mixer containing a solvent under a stirring state, and after the acrylic resin is uniformly dispersed, sequentially adding an oligomer or a monomer, a photoinitiator and a curing agent into the glue mixer to carry out mixing and stirring to form a tackifying glue solution;
acquiring a bubble image of the upper surface of the tackifying glue solution, acquiring bubble characteristics according to the bubble image, and determining whether to adjust preset defoaming pressure and preset water bath temperature set in defoaming treatment according to the bubble characteristics;
the bubble feature includes: bubble position, newly added bubble position, real-time floating area and real-time floating rate;
the method comprises the steps of carrying out defoaming treatment on the tackifying glue solution, coating the tackifying glue solution on a substrate to form a tackifying glue film, periodically detecting the coating process, simultaneously carrying out film thickness detection and refractive index detection on the longitudinal section position of the tackifying glue film every time a preset length detection interval is passed, and judging the quality of the tackifying glue film based on the detection result of the current period so as to determine whether to adjust the running state of coating equipment in real time;
When each time of determination is carried out, real-time film thickness values of the coated tackifying film detected by each acquisition point in the longitudinal section position are obtained in real time, the average value of the real-time film thickness values is calculated, the section film thickness value of the longitudinal section position is obtained, the section film thickness value is recorded as the average film thickness value of the tackifying film in the current acquisition period, and the average film thickness value is determined according to the standard film thickness value;
when the average film thickness value is determined to be smaller than the standard film thickness value, adjusting the preset coating amount of the coating head to be Qc' =qc× [1+ (Hb-Hj)/Hj ];
wherein Qc '=qc× [1+ (Hb-Hj)/Hj ], qc' is a value obtained by increasing the preset coating amount, qc represents the preset coating amount, hj represents the calculated average film thickness value, hb represents the set standard film thickness value, and the longitudinal direction of the longitudinal section position is the direction perpendicular to the displacement direction of the adhesive film;
setting allowable fluctuation difference values of the thickness of the tackifying adhesive, when the average thickness value is larger than or equal to the standard thickness value, acquiring real-time thickness values detected by all acquisition points in the longitudinal section position, subtracting the average thickness values from the real-time thickness values respectively, and then calculating absolute values of the real-time thickness values to obtain all the film thickness difference values, and sequentially judging all the film thickness difference values according to the allowable fluctuation difference values;
Setting a standard curing rate, when judging that the film thickness difference is larger than the allowable fluctuation difference, acquiring real-time film thickness values detected by all acquisition points of the longitudinal section position, determining a standard fluctuation interval according to the standard film thickness values and the allowable fluctuation difference, judging all the real-time film thickness values according to the standard fluctuation interval, and adjusting the state of the tackifying liquid in a coating mixer in the coating equipment or the operation parameters of the coating equipment;
under the condition that the film thickness difference is larger than the allowable fluctuation difference, if the real-time film thickness value is in the standard fluctuation interval and the real-time curing rate is smaller than the standard curing rate, selecting a method for eliminating bubbles in the tackifying glue solution according to the refractive index detection result of the longitudinal section position;
the method comprises the steps of performing simulation marking on acquisition points corresponding to real-time film thickness values which are not in a standard fluctuation interval, dividing the longitudinal section position into a first section position, a second section position and a third section position in sequence along the longitudinal section direction, judging the distribution of the simulation marking points of the longitudinal section position, and recording the ratio of the number of the simulation marking points falling in the second section position to the total number of the simulation marking points as the real-time curing rate of the tackifying glue;
Curing the dried tackifying adhesive film, bagging after curing and storing in a dark place.
Further, after defoaming treatment is carried out on the tackifying glue liquid in the glue mixer, the tackifying glue liquid is transferred into a coating mixer in UV tackifying glue liquid coating equipment to carry out a coating process, the tackifying glue liquid is sprayed onto a substrate through a coating head to form a tackifying glue film, and the longitudinal section position of the upper surface of the tackifying glue film is irradiated simultaneously through a laser thickness meter and an optical fiber sensor every time a preset length detection interval is passed, so that periodic detection is carried out on the coating process, wherein the periodic detection comprises film thickness detection and refractive index detection.
Further, if the film thickness values are not within the standard fluctuation range, the preset coating speed of the winding device is adjusted to Nc' =nc× [1+ (Hs-Xb)/Hs ];
if the real-time film thickness value is in the standard fluctuation interval and the real-time curing rate is smaller than the standard curing rate, judging the real-time refractive index difference value according to the standard refractive index difference value so as to mark the sampling point;
if the real-time film thickness value is in the standard fluctuation interval and the real-time curing rate is more than or equal to the standard curing rate, adjusting the preset mixing temperature in the coating mixer to be Us' =us× [1+ (Ks-Km)/Ks ];
Wherein Nc '=nc× [1+ (Hs-Xb)/Hs ], nc' is the adjusted preset coating speed, xb is the sum of the standard film thickness value and the allowable fluctuation difference value, the allowable fluctuation difference value is a positive value, hs is the section film thickness value at the longitudinal section position, and Nc is the set preset coating speed;
us '=usx [1+ (Ks-Km)/Ks ], us' represents a value obtained by adjusting the preset mixing temperature according to the real-time curing rate, us represents a preset mixing temperature set, ks represents a calculated real-time curing rate, and Km represents a standard curing rate set.
Further, when the real-time curing rate is judged to be smaller than the standard curing rate, the real-time refractive index of each sampling point of the longitudinal section position is obtained according to the refractive index detection result of the optical fiber sensor on the tackifying film, the average value of each real-time refractive index is calculated, for any sampling point of the longitudinal section position, the real-time refractive index difference is obtained by subtracting the average value from the real-time refractive index, the real-time refractive index difference is judged according to the standard refractive index difference,
if the real-time refractive index difference value is smaller than or equal to the standard refractive index difference value, the corresponding sampling point is not marked;
if the real-time refractive index difference is larger than the standard refractive index difference, marking the corresponding sampling points as difference sites until the marking and judgment of the difference sites are completed on each sampling point at the longitudinal section position, obtaining the percentage of the number of the difference sites at the longitudinal section position to the total sampling points, obtaining the real-time difference rate, and comparing the standard difference rate with the real-time difference rate to select a method for eliminating bubbles.
Further, if the real-time difference rate is equal to or smaller than the standard difference rate, the initial rotation speed of the stirring paddle in the coating mixer is adjusted to be Vs' =Vs× [1- (Mb-Ms)/Ms ];
if the real-time difference rate is larger than the standard difference rate, the operation of re-defoaming the glue solution in the coating mixer is performed;
wherein, vs '=vs× [1- (Ms-Mb)/Ms ], vs' represents the initial rotation speed of the adjusted stirring paddle, vs represents the set initial rotation speed of the stirring paddle, mb represents the set standard difference rate, and Ms represents the calculated real-time difference rate.
Further, stirring the tackifying glue solution in the glue mixer, acquiring a bubble image on the surface of the tackifying glue solution through a camera device, judging bubbles in the bubble image,
if bubbles exist in the bubble image, vacuumizing the interior of the glue mixer, defoaming the tackifying glue solution, monitoring the defoaming process to select a mode of regulating and controlling vacuum conditions,
and if no bubble exists in the bubble image, not performing vacuumizing operation on the inside of the glue mixer, and putting the tackifying glue solution into a coating mixer to perform a coating process.
Further, when judging that bubbles exist in the bubble images, carrying out vacuumizing operation on the inside of the glue mixer, carrying out defoaming treatment on the tackifying glue solution, obtaining bubble images corresponding to two end points of a preset collection interval, obtaining the positions and the corresponding areas of the bubbles according to the bubble images collected at the initial time of the preset collection interval, calculating the sum of the areas of the bubbles to obtain initial bubble areas, obtaining the positions and the corresponding areas of the newly added bubbles in the bubble images collected at the final time of the preset collection interval, adding the areas of the newly added bubble positions to obtain the real-time floating area of the bubbles, dividing the real-time floating area by the initial bubble area to obtain the real-time floating rate of the bubbles in the tackifying glue solution, judging the real-time floating rate according to the standard floating rate,
if the real-time floating rate is smaller than or equal to the standard floating rate, adjusting the preset defoaming pressure to Pc' =Pc× [1- (Sb-Ss)/Ss ];
wherein Pc' is the adjusted preset defoaming pressure, pc is the set preset defoaming pressure, ss is the calculated real-time floating rate, and Sb is the set standard floating rate.
Further, setting the minimum defoaming pressure, when judging that the real-time floating rate is smaller than or equal to the standard floating rate, adjusting the preset defoaming pressure, repeatedly acquiring bubble images corresponding to two end points of a preset acquisition interval, calculating the real-time floating rate, judging the real-time floating rate according to the standard floating rate, until judging that the preset defoaming pressure is regulated to be smaller than or equal to the minimum defoaming pressure, still judging that the real-time floating rate is smaller than or equal to the standard floating rate, and regulating the temperature of the preset water bath to be Tc' =Tcx [1+ (Sb-Ss)/Ss ];
Wherein Tc' is the adjusted preset water bath temperature, tc is the set preset water bath temperature, ss is the calculated real-time floating rate, and Sb is the set standard floating rate.
Compared with the prior art, the invention has the beneficial effects that the glue solution formed by mixing is vacuumized by combining the image recognition technology, so that bubbles in the glue solution are completely removed, meanwhile, the upward floating bubbles are detected and analyzed, the accuracy of vacuumization conditions is ensured, the glue solution is transferred to a coating mixer for stirring, the glue solution is prevented from being unevenly influenced by the quality of the finally coated glue tape, the thickness of the coated glue film is detected in real time, whether the bubble distribution result is further determined according to the real-time refractive index is determined according to the glue film thickness detection result, and the coating effect is analyzed according to the bubble distribution result, so that the coating parameters are adaptively regulated and controlled, the coating efficiency is improved, the coating quality is ensured, and the quality of the glue tape is further ensured.
Further, whether the coating amount is accurate or not is determined by detecting the thickness of the adhesive on the surface of the coated substrate, the adhesive solution dropped from the path of the coating head is dispensed onto the substrate through the coating head, the adhesive solution dropped from the path of the coating head is analyzed along the displacement direction of the coating head, a plurality of collecting points are arranged on the longitudinal section, the real-time film thickness value corresponding to each collecting point is detected, the average value of the film thickness values of the cross sections is calculated, namely the average thickness of the adhesive film is recorded in the collecting range, the quality of the adhesive film is primarily determined, if the average film thickness value is determined to be smaller than the standard film thickness value, the film thickness of the formed adhesive film is indicated to be lower than the standard, the real-time property of regulation is increased by increasing the preset coating amount, the accurate metering of the coating amount is realized, if the average film thickness value is determined to be larger than or equal to the standard film thickness value, the detected average coating thickness value is indicated to be higher, the film thickness is possibly caused by uneven surface, the average film thickness value is calculated, the average value of the film thickness value of the cross sections is calculated, the film thickness value in the collecting range is recorded, the average value is, the average value of the film thickness value is recorded, the film thickness is lower than the standard film thickness, and the film thickness is required to be measured, and the surface is accurately measured, the real, and the real film thickness is.
Further, the film thickness detected by each collecting point in the longitudinal section position is judged to analyze the reason that the average film thickness of the longitudinal section position is larger, and whether the flatness of the film surface is within an allowable error range is judged by calculating the difference between the film thickness value of each detecting point and the average film thickness value, if the film thickness difference is judged to be smaller than the allowable fluctuation difference, the thickness fluctuation value of the film surface is shown to be within the allowable error range, the produced adhesive tape meets the process requirement, if the film thickness difference is judged to be larger than the allowable fluctuation difference, the unevenness of the film surface is shown to be larger, the error exceeds the requirement of the coating process, the error is required to be adjusted in time, the error is probably caused by the existence of bubbles in the adhesive solution, the viscosity of the adhesive solution is also probably larger, and the film thickness change is required to be further analyzed on a base material, so that the coating parameters are adaptively adjusted, the coating quality and the efficiency are improved, and the adhesive tape quality is further ensured.
In particular, through further analysis of the condition that the surface of the longitudinal section of the adhesive film is large in roughness, the roughness change rule of the surface of the adhesive film is simply and directly represented, if all real-time film thickness values are judged not to be in a standard fluctuation interval, the film thickness values of the surface of the longitudinal section are larger than the standard film thickness, the coating speed of the coating head is slower, the contact time between the released adhesive solution and a longitudinal section of a substrate is longer, the adhesive solution is accumulated at the longitudinal section, a state that the surface is smooth but the adhesive film is thick is formed, the preset coating speed is increased through the adaptability, the adhesive film thickness is prevented from being higher than a set standard value due to the fact that the coating head is relatively thicker than the substrate, if the real-time film thickness values are judged to be in the standard fluctuation interval, the real-time curing rate is larger than or equal to the standard curing rate, the adhesive solution is judged to be relatively lower in fluidity, the adhesive solution is concentrated at the position of the coating head, namely at the middle of the substrate, the temperature in the coating mixer is required to be adaptively increased, the adhesive solution is enabled to be easily coated on the substrate, if the real-time curing rate is judged to be smaller than the standard curing rate, the adhesive film is required to be relatively higher, the bubble in the adhesive film is required to be further analyzed, and the bubble in the fluctuation is required to be further analyzed, and the bubble is further analyzed.
Further, the reason that fluctuation of the surface of the adhesive film is large is analyzed, namely the distribution of bubbles is judged, whether the transparency of the adhesive film is uniform or not is represented by acquiring the real-time refractive index of each sampling point of the longitudinal section position, and the acquisition points with the refractive index not meeting the preset standard are marked to analyze the bubble distribution of the longitudinal section position.
Particularly, if the distribution of bubbles is analyzed, if the bubbles are less, the rotation speed of a stirring paddle in the coating mixer is reduced, so that a small amount of bubbles mixed in the glue solution in the coating mixer are eliminated, the generation of new bubbles is reduced, and if the real-time difference rate is greater than the standard difference rate, the bubbles are more densely distributed, and the bubbles in the glue solution can only be defoamed again, so that the coating quality is ensured.
Further, the state of the prepared tackifying glue solution is judged by combining an image recognition technology, the intelligence of a glue preparation process is increased, the bubble condition of the tackifying glue solution is determined by acquiring the surface bubble characteristics of the tackifying glue solution in a stirring state, the bubbles in the tackifying glue solution are eliminated by defoaming treatment in time, the instantaneity of a glue mixing process is improved, the quality of the solidified glue is ensured, and the glue production efficiency is improved.
Further, through judging the bubble distribution change on the glue surface in the vacuumizing process to detect the effect of defoaming treatment, if the real-time floating rate is less than or equal to the standard floating rate, the number of floating bubbles in the tackifying glue solution is small, the vacuumizing pressure is required to be reduced, the phenomenon that bubbles in the tackifying glue solution cannot be extracted due to small pressure difference conditions is avoided, bubbles are necessarily generated in the glue mixing process, the defoaming efficiency is improved by adjusting the defoaming conditions, if the real-time floating rate is greater than the standard floating rate, a large number of bubbles are represented to float, the vacuumizing pressure is proper at the moment, and the complete removal of the bubbles in the glue is ensured only by maintaining the defoaming treatment conditions.
Further, the viscidity increasing liquid system after depressurization is analyzed and judged through the combined image recognition technology, if the real-time floating rate is judged to be smaller than or equal to the standard floating rate, the influence of depressurization on the floating of bubbles is small, the glue temperature is required to be increased, so that the viscosity of the glue is reduced, bubbles in the glue are easy to float, the situation that the bubbles cannot be discharged in time due to the fact that the viscosity of the glue is large and the quantity of the glue in a glue mixing tank is large is avoided, the vacuumizing condition and the glue temperature condition are controlled, the bubble removal efficiency is improved, the glue quality is guaranteed, and the glue preparation efficiency is improved.
Further, the non-UV acrylic glue is modified into UV tackifying glue by adding UV oligomer or monomer, and the method is simple and effective.
Drawings
FIG. 1 is a schematic flow chart of a method for preparing an adhesive tape containing UV tackifying glue according to an embodiment of the invention;
FIG. 2 is a schematic diagram of the logic for determining the surface unevenness of the adhesive film based on the detection result according to the embodiment of the present invention;
FIG. 3 is a schematic structural view of an apparatus for applying UV tackifying glue according to an embodiment of the present invention;
FIG. 4 is a graph showing the relationship between the loss tangent and the temperature before and after UV of the tackifying glue according to the embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, which is a schematic flow chart of a method for preparing an adhesive tape containing UV tackifying glue according to an embodiment of the present invention, the present invention provides a method for preparing an adhesive tape containing UV tackifying glue, including, step S1, a glue mixing procedure; step S2, defoaming and coating processes; step S3, a drying procedure; step S4, curing process; wherein,
step S1, adding acrylate resin into a glue mixer containing a solvent under a stirring state, and after the acrylate resin is uniformly dispersed, sequentially adding an oligomer or a monomer, a photoinitiator and a curing agent into the glue mixer to mix and stir to form a tackifying glue solution;
S2, acquiring a bubble image of the upper surface of the tackifying glue solution, acquiring bubble characteristics according to the bubble image, determining whether to adjust preset defoaming pressure and preset water bath temperature according to the bubble characteristics, performing defoaming treatment on the tackifying glue solution, coating the tackifying glue solution on a substrate after the defoaming treatment to form a tackifying glue film, acquiring real-time film thickness values after coating detected by each acquisition point in real time in the coating process, calculating an average film thickness value according to each real-time film thickness value, judging each real-time film thickness value according to a standard fluctuation interval when judging that the average film thickness value is greater than or equal to a standard film thickness value and the film thickness difference is greater than an allowable fluctuation difference value, so as to select to adjust the state of the tackifying glue solution in a coating mixer or the operation parameters of coating equipment, and judging the real-time refractive index difference value according to a standard refractive index difference value when the real-time curing rate is smaller than a standard curing rate, so as to select a method for eliminating bubbles in the glue solution;
the bubble feature includes: the film thickness parameters comprise a real-time film thickness value, a section film thickness value and an average film thickness value;
S3, placing the tackifying adhesive film in an oven for drying;
and S4, curing the dried tackifying adhesive film, bagging after curing, and preserving in a dark place.
The kinetic glass transition temperature of the acrylic resin in the embodiment is < -20 ℃, and the weight average molecular weight is more than 30 ten thousand; the oligomer or monomer can be single component or multicomponent mixture, the boiling point of the oligomer or monomer is more than 140 ℃, the oligomer is the oligomer with UV polymerizable active unsaturated double bond or cyclization structure at one end or two ends of the polymer, the basic physical properties before and after curing the UV adhesive are determined, urethane (methyl) acrylate, epoxy (methyl) acrylate, cyclohexane dimethanol-1, 4 diacrylate and the like can be selected, the monomer is active diluent (methyl) acrylate for UV curing, hydroxyethyl (methyl) acrylate, 2-phenoxyethyl (methyl) acrylate and the like can be selected; the photoinitiator is a free agent type I initiator, such as TPO, 184 and the like; the curing agent is isocyanate type curing agent; the solvent is methanol, ethyl acetate, etc.; the drying condition in the step S3 is that the baking is carried out for 1-3min at the temperature of 110-120 ℃; the curing condition in the step S4 is 45-60 ℃ for 2-4d;
In this embodiment, the glue solution formed by mixing is defoamed by combining the image recognition technology to form a tackifying glue solution, and then the tackifying glue solution is transferred into a coating mixer in a coating device to perform a coating procedure, and in the coating process, a detecting instrument arranged at one side of the coating mixer is used for periodically detecting the tackifying glue film, so that a computing module judges whether the thickness and the flatness of the tackifying glue film are qualified according to current detection data, and when judging that the surface of the tackifying glue film is uneven, an analysis reason is analyzed, namely whether a bubble distribution result is further determined according to a real-time refractive index is determined according to a glue film thickness detection result, and a coating effect is analyzed according to the bubble distribution result, so that the coating parameter is adaptively regulated and controlled according to detection data of the current period, the coating efficiency is improved, the coating quality is ensured, and the quality of the adhesive tape is further ensured.
Fig. 2 is a logic diagram of determining that the surface of the adhesive film is uneven based on the detection result according to the embodiment of the present invention;
specifically, in the step S2, a standard film thickness value and a preset length detection interval of the tackifying film are set, after the tackifying film in the glue mixer is subjected to defoaming treatment, the tackifying film is transferred into a coating mixer in a coating device of the UV tackifying film to perform a coating process, the tackifying film is dotted out onto a substrate through a coating head to form the tackifying film, a winding device drives the tackifying film to displace, and in the displacement process, the longitudinal section positions of the upper surface of the tackifying film are simultaneously irradiated through a laser thickness meter and an optical fiber sensor every time the preset length detection interval is passed, so that the periodic detection is performed on the coating process, namely, the film thickness detection and the refractive index detection are simultaneously performed on the longitudinal section positions of the tackifying film every time the preset length detection interval is passed, and the quality of the tackifying film is judged based on the detection result of the current period, so as to determine whether the running state of the coating device is adjusted in real time;
Irradiating the longitudinal section position of the upper surface of the tackifying adhesive film by a laser thickness meter during each detection to obtain real-time film thickness values of all the acquisition points of the longitudinal section position, calculating the average value of all the real-time film thickness values to obtain the section film thickness value of the longitudinal section position, recording the section film thickness value as the average film thickness value of the tackifying adhesive film in the current acquisition period, judging the average film thickness value according to the standard film thickness value,
if the average film thickness value is smaller than the standard film thickness value, adjusting the preset coating amount of the coating head to be Qc' =Qc× [1+ (Hb-Hj)/Hj ];
if the average film thickness value is greater than or equal to the standard film thickness value, sequentially judging each film thickness difference value according to the allowable fluctuation difference value so as to analyze the surface state of the tackifying film;
wherein Qc '=qc× [1+ (Hb-Hj)/Hj ], qc' is a value obtained by increasing the preset coating amount, qc represents the preset coating amount, hj represents the calculated average film thickness value, hb represents the set standard film thickness value, and the longitudinal direction of the longitudinal section position is the direction perpendicular to the displacement direction of the adhesive film;
the standard film thickness value set in this example was changed by the change in the coating process requirement, and was set to 9 mm; the preset length detection interval is related to the length of the base material and the design of the coating process, can be set to be 30 cm, and is adaptively selected according to the actual production precision requirement;
The method comprises the steps of detecting the thickness of the adhesive on the surface of a coated substrate to determine whether the coating amount is accurate, dispensing the adhesive on the substrate through a coating head, analyzing the adhesive dispensed on the substrate by the coating head along the displacement direction of a winding device, periodically detecting the longitudinal section of the adhesive film to emit light beams by a laser thickness meter and an optical fiber sensor when the adhesive film passes through a preset length detection interval, instantly finishing film thickness detection and refractive index detection, analyzing latest detection data to determine whether to adjust parameters of coating equipment, arranging a plurality of acquisition points on the longitudinal section, detecting real-time film thickness values corresponding to the acquisition points, calculating an average value of the real-time film thickness values to obtain a section film thickness value, recording the section film thickness value as an average thickness of the adhesive film, primarily judging the quality of the adhesive film, and indicating that the formed adhesive film thickness of the adhesive film is lower than a standard film thickness value if the average film thickness value is judged to be lower than the standard value, and further realizing accurate preset film thickness measurement and accurate coating quantity detection by increasing the coating amount, and realizing accurate preset film thickness measurement and accurate coating quantity detection, and ensuring that the film thickness is higher than the average thickness value, thus the surface coating quality can not be required to be more accurately regulated and more accurately, and the coating the surface coating can be required is required to be better, and more accurately and accurately coated.
Specifically, in the step S2, allowable fluctuation difference values of the film thickness of the adhesion promoting adhesive are set, when the average film thickness value is larger than or equal to the standard film thickness value, real-time film thickness values detected by all the acquisition points in the longitudinal section position are obtained, the absolute values of the real-time film thickness values are respectively subtracted from the average film thickness values, all the film thickness difference values are obtained, all the film thickness difference values are sequentially judged according to the allowable fluctuation difference values,
if the film thickness difference values are smaller than the allowable fluctuation difference value, the running state of the coating equipment is not adjusted;
if the film thickness difference is larger than the allowable fluctuation difference, the surface unevenness of the tackifying adhesive film is judged, and each real-time film thickness value is judged according to the standard fluctuation interval so as to adjust the state of the tackifying adhesive film in the coating mixer or the operation parameters of the coating equipment.
The allowable fluctuation difference set in this embodiment means a thickness difference that allows the surface of the adhesive-added film to fluctuate, and is generally set between 0.2 mm and 0.5 mm, and is adaptively selected according to the actual coating process requirements;
the film thickness detected by each collecting point in the longitudinal section position is judged to analyze the reason that the average film thickness is larger, and whether the flatness of the film surface is within the allowable error range is judged by calculating the difference between the film thickness value of each detecting point and the average film thickness value, if the film thickness difference is judged to be smaller than the allowable fluctuation difference, the thickness fluctuation value of the film surface is shown to be within the allowable error range, the produced adhesive tape meets the process requirement, if the film thickness difference is judged to be larger than the allowable fluctuation difference, the unevenness of the film surface is shown to be larger, the error exceeds the requirement of the coating process, the film thickness change is needed to be further analyzed, the coating parameters are adaptively adjusted, the coating quality and the coating efficiency are improved, and the adhesive tape quality is further ensured.
Specifically, in the step S2, a standard curing rate is set in the step S2, when it is determined that the film thickness difference is greater than the allowable fluctuation difference, real-time film thickness values detected by the acquisition points of the longitudinal section position are obtained, a standard fluctuation interval is determined according to the standard film thickness values and the allowable fluctuation difference, each real-time film thickness value is determined according to the standard fluctuation interval,
if the film thickness values are not in the standard fluctuation interval, adjusting the preset coating speed of the winding device to be Nc' =Nc× [1+ (Hs-Xb)/Hs ];
if the real-time film thickness value exists in the standard fluctuation interval, carrying out simulation marking on the acquisition points corresponding to the real-time film thickness value which is not in the standard fluctuation interval, dividing the longitudinal section position into a first section position, a second section position and a third section position along the longitudinal section direction, judging the distribution of the simulation marking points of the longitudinal section position, obtaining the ratio of the number of the simulation marking points falling in the second section position to the total number of the simulation marking points, recording the ratio as the real-time curing rate of the tackifying glue, judging the real-time curing rate according to the standard curing rate,
If the real-time curing rate is smaller than the standard curing rate, judging the real-time refractive index difference value according to the standard refractive index difference value so as to mark the difference sites of the sampling points;
if the real-time curing rate is greater than or equal to the standard curing rate, adjusting the preset mixing temperature in the coating mixer to be Us' =us× [1+ (Ks-Km)/Ks ];
wherein Nc '=nc× [1+ (Hs-Xb)/Hs ], nc' is the adjusted preset coating speed, xb is the sum of the standard film thickness value and the allowable fluctuation difference value, the allowable fluctuation difference value is a positive value, hs is the section film thickness value at the longitudinal section position, and Nc is the set preset coating speed;
us '=usx [1+ (Ks-Km)/Ks ], us' represents a value obtained by adjusting the preset mixing temperature according to the real-time curing rate, us represents a preset mixing temperature set, ks represents a calculated real-time curing rate, and Km represents a standard curing rate set.
The standard curing rate set in the embodiment is 80% -90%, the standard curing rate indicates that the collection points corresponding to the larger film thickness value are distributed in the middle position of the base material in a concentrated mode, the longitudinal section position is divided into three sections with equal intervals, the three sections correspond to the first section position, the second section position and the third section position respectively, the second section position is the middle position of the base material, and the standard film thickness value and the allowable fluctuation difference value form a standard fluctuation interval;
Further analysis is carried out on the condition that the surface of the longitudinal section of the adhesive film is large in roughness, the roughness change rule of the surface of the adhesive film is simply and directly represented, if the film thickness value of each real-time film is judged to be not in a standard fluctuation interval, the film thickness value of the surface of the longitudinal section is larger than the standard film thickness, the coating speed of a coating head is slower, the contact time between the released adhesive solution and a longitudinal section of a substrate is longer, the adhesive solution is accumulated at the longitudinal section position, the state that the surface is smooth but the adhesive film is thick is formed, the preset coating speed is increased through adaptability, the phenomenon that the adhesive film thickness is higher than a set standard value due to the fact that the coating head is stagnant compared with the substrate is avoided, if the adhesive film thickness value is judged to be in the standard fluctuation interval, the real-time curing rate is larger than or equal to the standard curing rate, the adhesive solution is concentrated at the position of the coating head due to the fact that the adhesive solution viscosity is lower, namely at the middle position of the substrate, the adhesive solution is required to be adaptively increased, the temperature in a coating mixer is reduced, the adhesive solution is increased, namely the adhesive solution is easier to be coated on the substrate, if the real-time curing rate is judged to be smaller than the standard curing rate, the adhesive film is smaller than the standard curing, the adhesive film is likely to be distributed in the fluctuation, and the bubble in the adhesive film is required to be further analyzed, and the bubble in the bubble is further is required to be analyzed.
Specifically, in the step S2, a standard refractive index difference is set, when it is determined that the real-time curing rate is smaller than the standard curing rate, the real-time refractive index of each sampling point at the longitudinal section position is obtained according to the refractive index detection result of the optical fiber sensor on the tackifying adhesive film, the average value of each real-time refractive index is calculated, the real-time refractive index is subtracted from the average value for any sampling point at the longitudinal section position, the absolute value is calculated again, the real-time refractive index difference is obtained, the real-time refractive index difference is determined according to the standard refractive index difference,
if the real-time refractive index difference value is smaller than or equal to the standard refractive index difference value, the corresponding sampling point is not marked;
if the real-time refractive index difference is larger than the standard refractive index difference, marking the corresponding sampling points as difference sites until the marking and judgment of the difference sites are completed on each sampling point at the longitudinal section position, obtaining the percentage of the number of the difference sites at the longitudinal section position to the total sampling points, obtaining the real-time difference rate, and comparing the standard difference rate with the real-time difference rate to select a method for eliminating bubbles.
In this embodiment, the standard refractive index difference is set to be 0.0001, the refractive condition of light passing through the glue represents the transparency, the refractive index of the air bubble is greatly different from that of the glue, the refractive index of the air in the air bubble is close to that of the air, the refractive index of the glue is generally 1.3-1.6, and the refractive index of the air is 1.0003-1.0004, so that the standard refractive index difference is set to be 0.3 or 0.6, and the air bubble in the glue is simply judged.
The method comprises the steps of analyzing the reason that fluctuation of the surface of the adhesive film is large, namely judging the distribution of bubbles, calculating the difference degree between the real-time refractive index and the average value by acquiring the real-time refractive index of each sampling point at the position of the longitudinal section so as to represent whether the transparency of the adhesive film is uniform, and marking the acquisition points with the refractive index which do not meet the preset standard so as to analyze the bubble distribution at the position of the longitudinal section.
Specifically, in the step S2, a standard difference rate is set, when it is determined that the real-time refractive index difference is greater than the standard refractive index difference, the percentage of the number of the difference sites of the longitudinal section position to the total number of sampling points is obtained, a real-time difference rate is obtained, the standard difference rate is compared with the real-time difference rate,
if the real-time difference rate is smaller than or equal to the standard difference rate, the initial rotation speed of the stirring paddle in the coating mixer is adjusted to Vs' =Vs× [1- (Mb-Ms)/Ms ];
if the real-time difference rate is larger than the standard difference rate, stopping displacement of the winding device, pouring out the glue solution in the coating mixer into the glue mixer for re-defoaming treatment;
wherein, vs '=vs× [1- (Mb-Ms)/Ms ], vs' represents the initial rotation speed of the adjusted stirring paddle, vs represents the set initial rotation speed of the stirring paddle, mb represents the set standard difference rate, and Ms represents the calculated real-time difference rate;
The standard deviation rate set in this example represents the defined standard value of bubble density, typically, between 20% and 35%, and is adaptively selected according to the tape preparation requirements;
by analyzing the distribution of the bubbles, if the bubbles are less, the rotation speed of a stirring paddle in the coating mixer is reduced to eliminate a small amount of bubbles mixed in the glue solution in the coating mixer and reduce the generation of new bubbles, and if the real-time difference rate is greater than the standard difference rate, the bubbles are more densely distributed, and the bubbles in the glue solution can only be defoamed again to ensure the coating quality.
Specifically, in the step S2, the tackifying liquid in the glue mixer is stirred, a bubble image on the surface of the tackifying liquid is obtained through an imaging device, bubbles in the bubble image are judged,
if bubbles exist in the bubble image, vacuumizing the interior of the glue mixer, defoaming the tackifying glue solution, monitoring the defoaming process to select a mode of regulating and controlling vacuum conditions,
and if no bubble exists in the bubble image, not performing vacuumizing operation on the inside of the glue mixer, and putting the tackifying glue solution into a coating mixer for a coating process.
The state of the prepared tackifying glue solution is judged by combining an image recognition technology, the intelligence of a glue preparation process is increased, the bubble condition of the tackifying glue solution is determined by acquiring the surface bubble characteristics of the tackifying glue solution in a stirring state, the bubbles in the glue are eliminated by defoaming treatment in time, the instantaneity of the glue mixing process is improved, the quality of the solidified glue is ensured, and the glue production efficiency is improved.
Specifically, in the step S2, when it is determined that there is a bubble in the bubble image, performing a vacuuming operation on the inside of the glue mixer, performing a defoaming treatment on the glue adding solution, obtaining bubble images corresponding to two end points of a preset collection interval, obtaining each bubble position and a corresponding area according to the bubble images collected at the initial time of the preset collection interval, calculating the sum of the areas of each bubble to obtain an initial bubble area, obtaining each newly added bubble position and a corresponding area in the bubble images collected at the final time of the preset collection interval, adding the areas of each newly added bubble position to obtain a real-time floating area of a bubble, dividing the real-time floating area by the initial bubble area to obtain a real-time floating rate of the bubble in the glue adding solution, determining the real-time floating rate according to a standard floating rate,
If the real-time floating rate Ss is smaller than or equal to the standard floating rate Sb, adjusting the preset defoaming pressure to Pc' =Pc× [1- (Sb-Ss)/Ss ];
if the real-time floating rate is greater than the standard floating rate, the preset defoaming pressure is not adjusted.
Wherein, pc '=pc× [1- (Sb-Ss)/Ss ], pc represents a set preset defoaming pressure, pc' represents an adjusted preset defoaming pressure, ss represents a calculated real-time floating rate, and Sb represents a set standard floating rate;
the preset defoaming pressure set in the embodiment is the pressure when the tackifying glue solution system is vacuumized, the set value is 40 kilopascals, when the pressure is reduced to vacuum, the air pressure in the bubbles is larger than the external pressure, the bubbles expand, overflow and rupture, so that the accuracy of vacuumizing pressure selection influences the defoaming efficiency; the set standard floating rate is affected by the vacuumizing operation condition, is generally set to be between 10 and 30 millimeters, and is adaptively selected according to the cross section area of an actual glue mixer and the quality of glue;
the preset acquisition interval is set to be 1-3 seconds;
the bubble distribution change on the glue surface in the vacuumizing process is judged to detect the effect of the defoaming treatment, if the real-time floating rate is less than or equal to the standard floating rate, which means that the quantity of floating bubbles in the tackifying glue solution is small, the vacuumizing pressure is required to be reduced, the phenomenon that bubbles in the tackifying glue solution cannot be pumped out due to small pressure difference conditions is avoided, and bubbles are necessarily generated in the glue mixing process, the defoaming efficiency is improved by adjusting the defoaming conditions, if the real-time floating rate is greater than the standard floating rate, which means that a large quantity of bubbles float, the vacuumizing pressure is proper at the moment, and the complete removal of the bubbles in the glue is ensured only by maintaining the defoaming treatment conditions.
Specifically, in the step S2, the lowest defoaming pressure is set, when the real-time floating rate is determined to be less than or equal to the standard floating rate, the preset defoaming pressure is reduced, the bubble images corresponding to the two end points of the preset acquisition interval are repeatedly acquired, the real-time floating rate is calculated, the operation of determining the real-time floating rate according to the standard floating rate is performed until the preset defoaming pressure is determined to be less than or equal to the lowest defoaming pressure, the real-time floating rate is still determined to be less than or equal to the standard floating rate, and the preset water bath temperature is adjusted to be Tc' =tc× [1+ (Sb-Ss)/Ss ];
wherein Tc' is the adjusted preset water bath temperature, tc is the set preset water bath temperature, ss is the calculated real-time floating rate, and Sb is the set standard floating rate;
the lowest defoaming pressure set in the embodiment is the lowest vacuumizing pressure condition, the set value is 10 kilopascals, and the situation that the vacuumizing pressure is continuously reduced to 0 kilopascals is avoided, so that the tackifying glue solution boils due to the solvent; the preset water bath temperature means that the temperature of the glue mixing tank is increased in a water bath manner, so that the viscosity of the glue is reduced, bubbles in the glue solution in the glue mixing tank are easy to float upwards and discharge, the preset water bath temperature is set to be 30 ℃, and the preset water bath temperature adjustment value is not more than 60 ℃;
And (3) analyzing and judging the viscosity-increasing glue solution system after depressurization by combining an image recognition technology, if the real-time floating rate is less than or equal to the standard floating rate, which means that the influence of depressurization on the floating of bubbles is small, increasing the glue temperature to reduce the glue viscosity, so that bubbles in the glue are easy to float, avoiding that the bubbles cannot be discharged in time due to large glue solution viscosity and large glue solution amount in a glue mixing tank, and improving the bubble removal efficiency, guaranteeing the glue quality and improving the glue preparation efficiency by controlling the vacuumizing condition and the glue solution temperature condition.
Specifically, the invention also provides UV tackifying glue, which comprises acrylate resin, monomer or oligomer, photoinitiator, curing agent and ethyl acetate.
The non-UV acrylic glue is changed into UV tackifying glue by adding UV oligomer or monomer, and the method is simple and effective.
Fig. 3 is a schematic structural diagram of an apparatus for applying UV tackifying glue according to an embodiment of the invention;
specifically, the invention also provides a device for coating UV tackifying glue, which comprises a coating mixer 1, a temperature control device 101, a stirring paddle 102, a coating head 2, a laser 301, an emitter 401, a detection mechanism 402, an unreeling device 5, a reeling device 6 and a calculating module (not shown in the figure), wherein,
The coating mixer 1 comprises a temperature control device 101 for regulating and controlling the preset mixing temperature in the coating mixer and a stirring paddle 102 which operates at an initial stirring speed, wherein the coating mixer is used for dispersing and stirring the tackifying glue solution in the coating mixer;
a coating head 2 connected to the coating mixer 1 for dispensing the tackifying liquid in the coating mixer onto a substrate in a predetermined coating amount;
the laser thickness gauge comprises a laser 301 arranged above the base material and a receiver arranged below the base material, wherein the laser is used for emitting light beams to the tackifying adhesive film every time a preset length detection interval is passed, so as to perform film thickness detection and obtain the real-time adhesive film thickness at each acquisition point at the longitudinal section position of the current acquisition period;
the optical fiber sensor comprises an emitter 401 arranged above the base material and a detection mechanism 402 arranged below the base material, wherein the detection mechanism is used for detecting the refractive index of the film thickness-detected tackifying adhesive film every time a preset length detection interval passes, and the optical fiber sensor can detect the refractive angle of the light beam passing through each acquisition point at the position of the longitudinal section to obtain the real-time refractive index corresponding to each acquisition point;
An unwinding device 5 for releasing the substrate at a preset coating speed;
a winding device 6 for collecting the coated tackifying adhesive tape;
and the calculation module is used for acquiring the latest detection data of the laser thickness gauge and the optical fiber sensor and determining whether to adjust the operation parameters of the coating equipment or not based on the detection result.
Example 1, 100 parts of acrylate resin (Tayilai 1545B, solid content 35%), 25 parts of monomer or oligomer (sartomer CN31NS, solid content 100%, mono-functional), 1.25 parts of photoinitiator (TPO), 1.875 parts of curing agent (Desmodur L-75C) and 65 parts of solvent (ethyl acetate) are mixed and stirred to prepare a solution, the solution is coated on a PET substrate of 50um, and the thickness of the colloid after drying is 10um;
example 2, 100 parts of acrylate resin (Tayiley 1545B, solid content 35%), 33 parts of monomer or oligomer (sartomer CN31NS, solid content 100%, mono-functional), 33 parts of monomer or oligomer (cyclohexanedimethanol-1, 4 diacrylate, CAS:67905-41-3, content 98%, difunctional), 1.25 parts of photoinitiator (TPO), 1.875 parts of curing agent (DesmodurL-75C), 65 parts of solvent (ethyl acetate) were mixed and stirred to prepare a solution, which was applied to a 50um PET substrate, and the gel thickness after drying was 10um;
Example 3, 100 parts of acrylate resin (Talbilus et 1545B, solids content 35%), 66 parts of monomer or oligomer (cyclohexanedimethanol-1, 4 diacrylate, CAS:67905-41-3, content 98%, difunctional), 1.25 parts of photoinitiator (TPO), 1.875 parts of curing agent (Desmodur L-75C), 65 parts of solvent (ethyl acetate) were mixed and stirred to prepare a solution, which was applied to a 50um PET substrate, and the gel thickness after drying was 10um.
The results of the adhesion-promoting performance test are shown in table 1, which is a UV adhesion-promoting performance test result; TABLE 1
180 DEG peel force before UV (gf/25 mm) 180 ° peel force after UV（gf/25mm)
Example 1 444 1038
Example 2 167 585
Example 3 533 945
Referring to fig. 4, a graph of the relationship between the loss tangent before and after UV and the temperature of the tackifying glue according to the embodiment of the invention is shown, wherein 101 represents the storage modulus after UV, 102 represents the loss modulus after UV, 103 represents the loss tangent after UV, 201 represents the storage modulus before UV, 202 represents the loss modulus after UV, and 203 represents the loss tangent after UV; the loss tangent is the tangent of the strain and stress cycle phase difference angle of the viscoelastic material under the action of an alternating force field, and is also equal to the ratio of the loss modulus to the storage modulus of the material, the loss tangent is the tangent of the strain and stress cycle phase difference angle of the viscoelastic material under the action of the alternating force field, and is also equal to the ratio of the loss modulus to the storage modulus of the material, the glue before UV is presented as viscous fluid, has higher loss modulus, lower storage modulus, the loss tangent of the glue is larger, the glue after UV becomes solid, the storage modulus is increased, and the loss modulus is reduced, so that the loss tangent of the glue after UV is reduced, the larger the loss tangent is indicates the viscosity of the material, the smaller the loss tangent is indicates the elasticity of the material is the greater, the glue prepared in the embodiment 1 has the transition temperature of < -20 ℃, and good wetting and laminating performance and lower viscosity are provided; after UV, the monomer or oligomer is subjected to free radical reaction and crosslinked into chains, so that the glass transition temperature of the colloid is increased to about 0-25 ℃ and the bonding strength of the colloid is increased.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A preparation method of an adhesive tape containing UV tackifying glue is characterized by comprising the following steps of,
adding acrylic resin into a glue mixer containing a solvent under a stirring state, and after the acrylic resin is uniformly dispersed, sequentially adding an oligomer or a monomer, a photoinitiator and a curing agent into the glue mixer to carry out mixing and stirring to form a tackifying glue solution;
Acquiring a bubble image of the upper surface of the tackifying glue solution, acquiring bubble characteristics according to the bubble image, and determining whether to adjust preset defoaming pressure and preset water bath temperature set in defoaming treatment according to the bubble characteristics;
the bubble feature includes: bubble position, newly added bubble position, real-time floating area and real-time floating rate;
the method comprises the steps of carrying out defoaming treatment on the tackifying glue solution, coating the tackifying glue solution on a substrate to form a tackifying glue film, periodically detecting the coating process, simultaneously carrying out film thickness detection and refractive index detection on the longitudinal section position of the tackifying glue film every time a preset length detection interval is passed, and judging the quality of the tackifying glue film based on the detection result of the current period so as to determine whether to adjust the running state of coating equipment in real time;
after defoaming treatment is carried out on the tackifying glue liquid in the glue mixer, the tackifying glue liquid is transferred into a coating mixer in UV tackifying glue liquid coating equipment to carry out a coating process, the tackifying glue liquid is sprayed out onto a substrate through a coating head to form a tackifying glue film, and the longitudinal section position of the upper surface of the tackifying glue film is irradiated simultaneously when a laser thickness meter and an optical fiber sensor pass through a preset length detection interval, so that periodic detection is carried out on the coating process, wherein the periodic detection comprises film thickness detection and refractive index detection;
When each time of determination is carried out, real-time film thickness values of the coated tackifying film detected by each acquisition point in the longitudinal section position are obtained in real time, the average value of the real-time film thickness values is calculated, the section film thickness value of the longitudinal section position is obtained, the section film thickness value is recorded as the average film thickness value of the tackifying film in the current acquisition period, and the average film thickness value is determined according to the standard film thickness value;
when the average film thickness value is determined to be smaller than the standard film thickness value, adjusting the preset coating amount of the coating head to be Qc' =qc× [1+ (Hb-Hj)/Hj ];
wherein Qc '=qc× [1+ (Hb-Hj)/Hj ], qc' is a value obtained by increasing the preset coating amount, qc represents the preset coating amount, hj represents the calculated average film thickness value, hb represents the set standard film thickness value, and the longitudinal direction of the longitudinal section position is the direction perpendicular to the displacement direction of the adhesive film;
setting allowable fluctuation difference values of the thickness of the tackifying adhesive, when the average thickness value is larger than or equal to the standard thickness value, acquiring real-time thickness values detected by all acquisition points in the longitudinal section position, subtracting the average thickness values from the real-time thickness values respectively, and then calculating absolute values of the real-time thickness values to obtain all the film thickness difference values, and sequentially judging all the film thickness difference values according to the allowable fluctuation difference values;
Setting a standard curing rate, when judging that the film thickness difference is larger than the allowable fluctuation difference, acquiring real-time film thickness values detected by all acquisition points of the longitudinal section position, determining a standard fluctuation interval according to the standard film thickness values and the allowable fluctuation difference, judging all the real-time film thickness values according to the standard fluctuation interval, and adjusting the state of the tackifying liquid in a coating mixer in the coating equipment or the operation parameters of the coating equipment;
if the film thickness values are not in the standard fluctuation interval, the preset coating speed of the winding device is adjusted to be Nc' =Nc× [1+ (Hs-Xb)/Hs ];
if the real-time film thickness value is in the standard fluctuation interval and the real-time curing rate is smaller than the standard curing rate, judging the real-time refractive index difference value according to the standard refractive index difference value so as to mark the sampling point;
if the real-time film thickness value is in the standard fluctuation interval and the real-time curing rate is more than or equal to the standard curing rate, adjusting the preset mixing temperature in the coating mixer to be Us' =us× [1+ (Ks-Km)/Ks ];
wherein Nc '=nc× [1+ (Hs-Xb)/Hs ], nc' is the adjusted preset coating speed, xb is the sum of the standard film thickness value and the allowable fluctuation difference value, the allowable fluctuation difference value is a positive value, hs is the section film thickness value at the longitudinal section position, and Nc is the set preset coating speed;
Us '=usx [1+ (Ks-Km)/Ks ], us' representing a value obtained by adjusting the preset mixing temperature according to the real-time curing rate, us representing the preset mixing temperature, ks representing the calculated real-time curing rate, km representing the standard curing rate;
under the condition that the film thickness difference is larger than the allowable fluctuation difference, if the real-time film thickness value is in the standard fluctuation interval and the real-time curing rate is smaller than the standard curing rate, selecting a method for eliminating bubbles in the tackifying glue solution according to the refractive index detection result of the longitudinal section position;
the method comprises the steps of performing simulation marking on acquisition points corresponding to real-time film thickness values which are not in a standard fluctuation interval, dividing the longitudinal section position into a first section position, a second section position and a third section position in sequence along the longitudinal section direction, judging the distribution of the simulation marking points of the longitudinal section position, and recording the ratio of the number of the simulation marking points falling in the second section position to the total number of the simulation marking points as the real-time curing rate of the tackifying glue;
placing the tackifying adhesive film in an oven for drying;
curing the dried tackifying adhesive film, bagging after curing and storing in a dark place.
2. The method for preparing an adhesive tape containing UV tackifying glue according to claim 1, wherein when the real-time curing rate is determined to be smaller than the standard curing rate, the real-time refractive index of each sampling point of the longitudinal section position is obtained according to the refractive index detection result of the optical fiber sensor on the tackifying glue film, the average value of each real-time refractive index is calculated, the real-time refractive index difference is obtained by subtracting the average value from the real-time refractive index for any sampling point of the longitudinal section position, the real-time refractive index difference is determined according to the standard refractive index difference,
if the real-time refractive index difference value is smaller than or equal to the standard refractive index difference value, the corresponding sampling point is not marked;
if the real-time refractive index difference is larger than the standard refractive index difference, marking the corresponding sampling points as difference sites until the marking and judgment of the difference sites are completed on each sampling point at the longitudinal section position, obtaining the percentage of the number of the difference sites at the longitudinal section position to the total sampling points, obtaining the real-time difference rate, and comparing the standard difference rate with the real-time difference rate to select a method for eliminating bubbles.
3. The method for preparing the adhesive tape containing the UV tackifying glue according to claim 2, wherein,
If the real-time difference rate is smaller than or equal to the standard difference rate, the initial rotation speed of the stirring paddle in the coating mixer is adjusted to Vs' =Vs× [1- (Mb-Ms)/Ms ];
if the real-time difference rate is larger than the standard difference rate, the operation of re-defoaming the glue solution in the coating mixer is performed;
wherein, vs '=vs× [1- (Mb-Ms)/Ms ], vs' represents the initial rotation speed of the adjusted stirring paddle, vs represents the set initial rotation speed of the stirring paddle, mb represents the set standard difference rate, and Ms represents the calculated real-time difference rate.
4. The method for preparing an adhesive tape containing UV tackifying glue according to claim 1, wherein the tackifying glue in the glue mixer is stirred, a bubble image on the surface of the tackifying glue is obtained by an imaging device, bubbles in the bubble image are judged,
if bubbles exist in the bubble image, vacuumizing the inside of the glue mixer, defoaming the tackifying glue solution, and monitoring the defoaming process to select a mode of regulating and controlling vacuum conditions;
and if no bubble exists in the bubble image, not performing vacuumizing operation on the inside of the glue mixer, and putting the tackifying glue solution into a coating mixer to perform a coating process.
5. The method according to claim 4, wherein when it is determined that there is a bubble in the bubble image, performing a vacuuming operation on the inside of the glue mixer, performing a deaerating process on the glue, obtaining bubble images corresponding to two end points of a preset collection interval, obtaining each bubble position and corresponding area according to the bubble images collected at the beginning of the preset collection interval, calculating the sum of the bubble areas to obtain an initial bubble area, obtaining each newly added bubble position and corresponding area in the bubble images collected at the end of the preset collection interval, adding the areas of the newly added bubble positions to obtain a real-time floating area of the bubble, dividing the real-time floating area by the initial bubble area to obtain a real-time floating rate of the bubble in the glue, determining the real-time floating rate according to a standard floating rate,
if the real-time floating rate is smaller than or equal to the standard floating rate, adjusting the preset defoaming pressure to Pc' =Pc× [1- (Sb-Ss)/Ss ];
wherein Pc' is the adjusted preset defoaming pressure, pc is the set preset defoaming pressure, ss is the calculated real-time floating rate, and Sb is the set standard floating rate.
6. The method for producing an adhesive tape containing a UV tackifying glue according to claim 5, wherein a minimum defoaming pressure is set, when it is determined that the real-time rising rate is equal to or less than the standard rising rate, the preset defoaming pressure is reduced, bubble images corresponding to both ends of the preset collection interval are repeatedly obtained, the real-time rising rate is calculated, the operation of determining the real-time rising rate according to the standard rising rate is performed until it is determined that the preset defoaming pressure is adjusted to equal to or less than the minimum defoaming pressure, it is still determined that the real-time rising rate is equal to or less than the standard rising rate, and the preset water bath temperature is adjusted to Tc' =tc× [1+ (Sb-Ss)/Ss ];
wherein Tc' is the adjusted preset water bath temperature, tc is the set preset water bath temperature, ss is the calculated real-time floating rate, and Sb is the set standard floating rate.
CN202410089338.2A 2024-01-23 2024-01-23 Preparation method of adhesive tape containing UV tackifying glue Active CN117603632B (en)

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Publication number Priority date Publication date Assignee Title
US4240747A (en) * 1979-10-03 1980-12-23 Battelle Memorial Institute Refractive-index responsive light-signal system
CN104307686A (en) * 2014-11-07 2015-01-28 合肥京东方光电科技有限公司 Transfer roller, packaging rubber film coating system and method of packaging rubber film
TW201619595A (en) * 2014-11-27 2016-06-01 Univ Nat Formosa Apparatus method and apparatus capable of detecting bubble
CN111512143A (en) * 2017-12-22 2020-08-07 雷迪奥米特医学公司 Method and sensor for detecting the presence or absence of a contaminant
CN116218423A (en) * 2022-12-29 2023-06-06 苏州赛伍应用技术股份有限公司 UV tackifying adhesive and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240747A (en) * 1979-10-03 1980-12-23 Battelle Memorial Institute Refractive-index responsive light-signal system
CN104307686A (en) * 2014-11-07 2015-01-28 合肥京东方光电科技有限公司 Transfer roller, packaging rubber film coating system and method of packaging rubber film
TW201619595A (en) * 2014-11-27 2016-06-01 Univ Nat Formosa Apparatus method and apparatus capable of detecting bubble
CN111512143A (en) * 2017-12-22 2020-08-07 雷迪奥米特医学公司 Method and sensor for detecting the presence or absence of a contaminant
CN116218423A (en) * 2022-12-29 2023-06-06 苏州赛伍应用技术股份有限公司 UV tackifying adhesive and preparation method thereof

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