CN114163949A - Ultra-transparent glue, ultra-transparent noiseless adhesive tape and preparation method thereof - Google Patents
Ultra-transparent glue, ultra-transparent noiseless adhesive tape and preparation method thereof Download PDFInfo
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- CN114163949A CN114163949A CN202210086136.3A CN202210086136A CN114163949A CN 114163949 A CN114163949 A CN 114163949A CN 202210086136 A CN202210086136 A CN 202210086136A CN 114163949 A CN114163949 A CN 114163949A
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- 239000002390 adhesive tape Substances 0.000 title claims abstract description 50
- 239000003292 glue Substances 0.000 title claims description 72
- 238000002360 preparation method Methods 0.000 title claims description 10
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims abstract description 69
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims abstract description 69
- 238000000576 coating method Methods 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 35
- 229920002545 silicone oil Polymers 0.000 claims abstract description 34
- 239000003999 initiator Substances 0.000 claims abstract description 32
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 29
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 21
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims abstract description 21
- -1 isooctyl ester Chemical class 0.000 claims abstract description 20
- 239000000853 adhesive Substances 0.000 claims abstract description 19
- 230000001070 adhesive effect Effects 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 125000004494 ethyl ester group Chemical group 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 45
- 229910052710 silicon Inorganic materials 0.000 claims description 45
- 239000010703 silicon Substances 0.000 claims description 45
- 238000006243 chemical reaction Methods 0.000 claims description 39
- 238000003756 stirring Methods 0.000 claims description 39
- 238000005096 rolling process Methods 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 10
- 238000001723 curing Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000003851 corona treatment Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000010892 electric spark Methods 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 8
- 238000002834 transmittance Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- LCEHKIHBHIJPCD-UHFFFAOYSA-N 6-methylheptanal Chemical compound CC(C)CCCCC=O LCEHKIHBHIJPCD-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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Classifications
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- 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
- C09J131/00—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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F218/00—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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F218/02—Esters of monocarboxylic acids
- C08F218/04—Vinyl esters
- C08F218/08—Vinyl acetate
-
- 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/201—Adhesives in the form of films or foils characterised by their carriers characterised by the release coating composition on the carrier layer
-
- 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
-
- 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
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
-
- 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
- C09J2423/00—Presence of polyolefin
- C09J2423/10—Presence of homo or copolymers of propene
- C09J2423/106—Presence of homo or copolymers of propene in the substrate
-
- 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
- C09J2483/00—Presence of polysiloxane
- C09J2483/001—Presence of polysiloxane in the barrier layer
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention relates to an ultra-transparent noiseless adhesive tape, which comprises a substrate layer, a release layer and a gluing layer, wherein the substrate layer adopts an ultra-transparent BOPP film with the haze of less than 0.4%, the release layer is formed by coating a solvent-free release agent on the back surface of the substrate layer, the solvent-free release agent comprises 95.7-98.8% of silicone oil and 1.2-4.3% of an initiator, the gluing layer adopts an acrylate adhesive, the acrylate adhesive comprises 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of the initiator, and by adopting the technical scheme, the noiseless BOPP adhesive tape has very small sound and almost no noise when being pulled open, the noise environment of a working place is really improved, and the working comfort level of workers is improved: the uncoiling force is moderate, and the uncoiling force is not heavy or light when the uncoiling force is manually pulled, so that the uncoiling device is convenient to use.
Description
Technical Field
The invention belongs to the field of adhesive tapes, and particularly relates to an ultratransparent glue, an ultratransparent noiseless adhesive tape and a preparation method thereof.
Background
The adhesive tape is common in production and life, the common adhesive tape can generate large harsh noise when being pulled open, uncomfortable feeling is brought to people, and the common adhesive tape needs to be slightly forced when being pulled open. In a factory packaging workshop, whether manual carton sealing or automatic carton sealing by a machine can generate great noise pollution, and certain influence is brought to body health for a long time. Meanwhile, the conventional adhesive tape has heavier unwinding force, high noise and poorer transparency, influences the recognition degree of a user, and cannot meet the occasions with high requirements on the transparency and silence of the adhesive tape. Under the consciousness of promoting the national environmental protection, the market urgently needs to develop a super-transparent noiseless adhesive tape.
Disclosure of Invention
In summary, in order to overcome the defects of the existing products, the invention provides an ultratransparent noiseless adhesive tape.
In order to achieve the purpose, the invention provides the following technical scheme: an ultra-transparent glue comprises 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of initiator.
By adopting the technical scheme and adopting the specially-prepared formula of the ultratransparent acrylic glue, the glue has good viscosity and good weather resistance, the high temperature resistance reaches 80 ℃, and the low temperature resistance reaches-20 ℃.
Preferably, the isooctanal: ethyl ester: vinyl acetate: acrylic acid: the ratio of initiator was 44.5: 48.3: 4.8: 2.0: 0.4.
by adopting the technical scheme, the light transmittance of the BOPP film is kept above 92% after the BOPP film is coated with the glue, and the ultra-transparent effect is achieved.
The invention also provides a preparation method of the ultratransparent glue, which comprises the following steps: step S1: preparing 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of initiator, firstly adding the ethyl ester into a reaction kettle, starting stirring, controlling the stirring speed at 30-40 r/min, starting heating the reaction kettle, and keeping the temperature at 74-80 ℃; step S2: adding one fifth of isooctyl ester, vinyl acetate, acrylic acid and an initiator, sequentially adding the mixture into a reaction kettle, stirring at the speed of 30-40 revolutions per minute, slowly heating to 79-85 ℃, stopping heating when the reflux reaction is large, adding the remaining four fifths of isooctyl ester, vinyl acetate, acrylic acid and the initiator, finishing the addition within 30-50 minutes, keeping the temperature of the reaction kettle for 3-5 hours after the addition is finished, and keeping the temperature at 79-85 ℃; step S3: after the constant temperature reaction is finished, the stirring speed is reduced to 10-20 r/min, and the temperature of the reaction kettle is reduced to 69-75 ℃ and is kept for half an hour; step S4: and continuously cooling the reaction kettle, reducing the temperature to 44-50 ℃, stopping stirring, testing the viscosity value of the glue to be between 2000 and 2500, and pumping the glue from the reaction kettle to a glue storage tank for storage for later use.
The invention further provides that: the step S1: the stirring speed of the reaction kettle is 30 revolutions per minute, and the initial temperature is 75 +/-1 ℃; the step S2: the temperature in the heat preservation stage is 80 +/-1 ℃, and the heat preservation is carried out for 4 hours; the step S3: the temperature is reduced to 70 +/-1 ℃ and is kept for half an hour; the step S4: when the temperature is reduced to 45 +/-1 ℃, the glue is released and tested, and the viscosity value of the glue is 2350.
By adopting the technical scheme, the light transmittance of the prepared ultra-transparent acrylic glue is kept above 92% after the BOPP film is coated with glue, and meanwhile, the glue is good in viscosity and weather resistance, the high temperature resistance reaches 80 ℃, and the low temperature resistance reaches-20 ℃.
The invention also provides a preparation method of the ultratransparent noiseless adhesive tape, which comprises the following steps: step S1: preparing a release agent; step S2: conveying the BOPP film to a corona guide roller, adjusting proper impact current and voltage, and carrying out corona treatment on the back of the BOPP film; step S3: coating silicon oil, conveying the treated BOPP film to a silicon coating head for coating the silicon oil, allowing the silicon-coated BOPP film to pass through an ultraviolet irradiation channel of a machine table and finally to be cooled by a cooling roller, and winding the cooled silicon film by a winding guide roller for later use; step S4: preparing glue, preparing 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of initiator, sequentially adding the materials into a reaction kettle, stirring, keeping a certain temperature to perform chemical reaction on the materials, and preparing the ultra-transparent glue after the reaction is finished; step S5: and (3) gluing, namely taking the prepared ultra-transparent glue, drawing the silicon-coated and cured ultra-transparent BOPP silicon film into a machine, conveying the silicon-coated and cured ultra-transparent BOPP silicon film to a gluing head for gluing, drying the glue surface of the BOPP film under the action of high-temperature air flow after the glued BOPP film passes through a machine oven, and recovering the solvent by a recovery system after the solvent is quickly volatilized. Step S6: and cooling and rolling, cooling by a cooling roller, rolling the cooled BOPP adhesive tape by a rolling guide roller, and finally cutting into small rolls by slitting, packaging and delivering.
By adopting the technical scheme, the back surface (non-gluing surface) of the BOPP film is subjected to corona treatment, so that silicone oil is better attached to the film surface; the BOPP film coated with silicon flows through the ultraviolet irradiation channel of the machine, and the silicon-coated surface is rapidly cured under the irradiation of ultraviolet rays released by the BOPP film; the adhesive tape obtained by the preparation method has little sound and almost no noise when being pulled open, so that the noise environment of a workplace is practically improved, and the working comfort of workers is improved: the uncoiling force is moderate, and the uncoiling force is not heavy or light when the uncoiling force is manually pulled, so that the uncoiling device is convenient to use.
The invention further provides that: the step S1 includes a step S11: adding 95.7-98.8% of silicone oil, and stirring for 10-15 minutes at a stirring speed of 18-30 revolutions per minute; step S12: adding 1.2-4.3% of initiator, and stirring at the stirring speed of 18-30 r/min for 10-15 min.
Preferably, in step S1, solvent-free silicone oil ZD318 is used, and the ratio of silicone oil to initiator is 96.8: 3.2, the stirring speed is 25 rpm, and the stirring time is 15 minutes.
By adopting the technical scheme, the uncoiling force and the noiseless effect are related to the selection and the proportion of the silicone oil, the solvent-free silicone oil ZD318 is adopted, and the proportion of the silicone oil to the initiator is 96.8: 3.2, when the adhesive tape is pulled away quickly or slowly, the sound is very small, sharp and harsh noises do not exist, the noise difference is less than 5dB, the noise is less than one tenth of that of a common adhesive tape, almost no noise exists, the noise environment of a workplace is practically improved, and the working comfort of workers is improved; by adopting the solvent-free silicone oil with the standard release force of 80-150g/IN, the uncoiling strength of the adhesive tape can be kept at 1-1.4N/cm, the adhesive tape is neither light nor heavy, and the use perception of a client is improved.
The invention further provides that: in the step S2, an ultra-transparent BOPP film with the thickness of 24-60um is adopted, the BOPP film is pulled into a machine table guide roller and is conveyed to a corona machine, the speed of the machine table is controlled to be 80-110 m/min, and the unreeling tension is controlled to be 1.5-3 Kgf; adjusting the output voltage of the corona machine to be 2-3.5KV, the output current to be 10-16A, and carrying out high-frequency high-voltage electric spark impact on the silicon-coated surface of the BOPP film.
By adopting the technical scheme, the ultra-transparent BOPP film with the thickness of 24-60um and the haze of less than 0.4% is adopted, the light transmittance of the BOPP film is kept above 92.3% after the BOPP film is coated with glue, and the ultra-transparent effect (the whole rolling effect is more obvious) is achieved; the high-frequency high-voltage electric spark impact is carried out on the silicon-coated surface of the BOPP film, so that the molecules on the film surface are oxidized to generate polarity, and the release agent is conveniently and better adsorbed on the film surface (the adhesive force is improved).
The invention further provides that: step S3 is a non-direct coating process, wherein a release agent is coated on a rubber roller, and then the release agent is attached to a BOPP film through the attachment of the roller and the film; adding the prepared silicone oil between a first roller and a second roller of a coating head, controlling the quantitative rate of the silicone oil to be 0.2-0.5 g/square meter by adjusting the speed ratio of a press roller, coating the quantitative silicone oil on a third rubber roller, transferring the silicone oil to a fourth rubber roller and a fifth rubber roller, and controlling the speed of a machine table to be 80-110 m/min; directly conveying the BOPP film subjected to corona treatment to a fifth roller, transferring silicon oil to the BOPP film surface through the fifth roller to finish the silicon coating process, wherein the temperatures of the first roller, the second roller and the third roller are controlled to be 20-30 ℃, and the temperatures of the fourth roller and the fifth roller are controlled to be 22-25 ℃; after the silicone oil is coated, the curing is finished through ultraviolet irradiation, and during the ultraviolet irradiation curing period of the BOPP film coated with the silicone oil, the film surface needs to be wrapped and filled with high-purity nitrogen; the wavelength of the ultraviolet lamp is between 220 and 365nm, and the irradiation energy of the lamp tube is controlled to be between 30 and 70 percent of the full power.
By adopting the technical scheme, the uniformity of the silicon amount in the silicon coating procedure is very critical, and the silicon oil coating amount is less, 0.2-0.5 g/square meter, and the uniformity is difficult to achieve by the conventional silicon coating method; ultraviolet low-temperature curing is adopted in the curing and forming process, so that the influence of high-temperature curing on the forming quality of the silicon surface is avoided; the silicon surface (film surface) needs to be wrapped and filled with high-purity nitrogen, the purity of the nitrogen reaches 99.999 percent, and air is isolated, so that the silicon is prevented from being oxidized due to contact with the air to influence the release effect; the wavelength of the ultraviolet lamp is between 220 and 365nm, the irradiation energy of the lamp tube is controlled to be between 30 and 70 percent of the full power, and the curing quality is improved according to the speed adjustment of the machine.
The invention further provides that: the step S5 includes a step S51 of gluing: drawing the cured BOPP silicon film into a machine guide roller, wherein the initial speed of the machine is 20-30 m/min, pumping the prepared glue into a glue groove, coating the glue by using a scraper, coating the glue on the glue coating surface of the film, controlling the glue coating amount and the uniformity by adjusting the gap between the scraper and a back glue roller, and controlling the glue amount to be 18-28g/m according to the product requirement2In the gluing stage, the machine table is not heated, the normal gluing speed of the machine table is increased to 50-70 m/min, and the unreeling tension is controlled to be 0.3-0.8 Kgf; step S52 drying and rolling: and (3) enabling the BOPP film coated with the glue to enter a drying and recycling system of an oven, wherein eight sections of ovens are arranged, the temperature of the first section of oven to the eighth section of oven is controlled to be 50 +/-5 ℃, 60 +/-5 ℃, 70 +/-5 ℃, 80 +/-5 ℃, 95 +/-5 ℃, 90 +/-5 ℃ and 80 +/-5 ℃, the dryness of the rolling adhesive tape is controlled to be 1-2%, and the rolling tension is controlled to be 20-25 Kgf.
The invention further provides that: initial speed of 20 m/min, unwinding tension of 0.5Kgf, and coating weight of 22 +/-1 g/m2The normal gluing speed is 60 m/min, the temperatures of the oven in the first section to the eighth section are 50 +/-2 ℃, 60 +/-2 ℃, 70 +/-2 ℃, 80 +/-2 ℃, 95 +/-2 ℃, 90 +/-2 ℃ and 80 +/-2 ℃, the dryness of the rolling adhesive tape is 1.3 percent, and the rolling tension is 22 Kgf.
By adopting the technical scheme, compared with the mode that high temperature is adopted when the adhesive tape enters the oven, the outermost layer of the adhesive surface is easy to dry, once the outer layer is dried, the moisture in the inner layer is not easy to disperse, the phenomenon of false drying of the adhesive is caused, and bubbles can be generated to influence the transparency of the adhesive tape; the technical scheme of the invention adopts eight sections of drying ovens, and the temperature setting of each temperature zone is tested for multiple times to obtain a parabolic temperature zone setting process, namely low, high and low, so that the produced adhesive tape has good adhesive dryness, good adhesive surface forming and high transparency.
The invention also provides an ultratransparent noiseless adhesive tape, which is characterized in that: the adhesive comprises a substrate layer, a release layer and a gluing layer, wherein the substrate layer adopts an ultra-transparent BOPP film with the haze of less than 0.4%, the release layer is formed by coating a solvent-free release agent on the back of the substrate layer, the solvent-free release agent comprises 95.7-98.8% of silicone oil and 1.2-4.3% of an initiator, the gluing layer adopts an acrylate adhesive, and the acrylate adhesive comprises 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of the initiator.
The invention has the advantages that: (1) and (4) ultra-transparent effect. Has better transparent effect than the common adhesive tape, the haze is less than 0.4 percent, and the light transmittance reaches more than 92 percent. Compared with the whole roll of adhesive tape, the perspective effect is more obvious (see the attached figure 5), and the bottom is seen thoroughly;
(2) and no noise exists. When the adhesive tape is pulled away quickly or slowly, the sound is very small, no sharp and harsh noise exists, and the noise difference is less than 5dB and less than one tenth of that of the common adhesive tape;
(3) the uncoiling strength is moderate. The uncoiling is not light and heavy, and the use convenience of a user is influenced by the light or heavy uncoiling. The unwinding force is kept within a suitable range (1-1.4N/cm): the whole roll can be lifted without slipping down when the adhesive tape is pulled open (see figure 6);
(4) the adhesive tape has strong viscosity and good weather resistance. The 180-degree peeling strength is kept between 3.5 and 7N/cm and is 40 to 100 percent higher than that of the common adhesive tape. The adhesive tape has good practicability and wide dynamic range of weather resistance, and still has good viscosity in a wider environment at the temperature of-20-80 ℃.
The examples describe specific embodiments of the present invention.
Drawings
FIG. 1 is a material proportion table (by mass) of the glue of the embodiment of the invention;
FIG. 2 is a material proportion table (by mass) of a mold release in an embodiment of the invention;
FIG. 3 is a process flow diagram of a method of making an adhesive tape according to an embodiment of the invention;
FIG. 4 is a schematic structural view of an adhesive tape according to an embodiment of the present invention;
FIG. 5 is a comparison of an embodiment of the present invention tape to a prior art tape;
FIG. 6 is a graph illustrating unwind strength for an embodiment of the present invention;
FIG. 7 is a comparison of tape parameters for the examples of the present invention;
reference numerals: 1. the adhesive comprises a base material layer, a release layer 2, an adhesive coating layer 3, an adhesive surface 4 and a back surface 5.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Referring to the attached drawing 1, the ultra-transparent glue disclosed in this embodiment comprises 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid, and 0.3-0.5% of initiator.
The embodiment further provides that: the isooctyl aldehyde: ethyl ester: vinyl acetate: acrylic acid: the ratio of initiator was 44.5: 48.3: 4.8: 2.0: 0.4.
referring to fig. 1, the embodiment further provides a preparation method of the ultra-transparent glue, which includes the following steps: step S1: preparing 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of initiator, firstly adding the ethyl ester into a reaction kettle, starting stirring, controlling the stirring speed at 30-40 r/min, starting heating the reaction kettle, and keeping the temperature at 74-80 ℃; step S2: adding one fifth of isooctyl ester, vinyl acetate, acrylic acid and an initiator, sequentially adding the mixture into a reaction kettle, stirring at the speed of 30-40 revolutions per minute, slowly heating to 79-85 ℃, stopping heating when the reflux reaction is large, adding the remaining four fifths of isooctyl ester, vinyl acetate, acrylic acid and the initiator, finishing the addition within 30-50 minutes, keeping the temperature of the reaction kettle for 3-5 hours after the addition is finished, and keeping the temperature at 79-85 ℃; step S3: after the constant temperature reaction is finished, the stirring speed is reduced to 10-20 r/min, and the temperature of the reaction kettle is reduced to 69-75 ℃ and is kept for half an hour; step S4: and continuously cooling the reaction kettle, reducing the temperature to 44-50 ℃, stopping stirring, testing the viscosity value of the glue to be between 2000 and 2500, and pumping the glue from the reaction kettle to a glue storage tank for storage for later use.
The embodiment further provides that: the step S1: the stirring speed of the reaction kettle is 30 revolutions per minute, and the initial temperature is 75 +/-1 ℃; the step S2: the temperature in the heat preservation stage is 80 +/-1 ℃, and the heat preservation is carried out for 4 hours; the step S3: the temperature is reduced to 70 +/-1 ℃ and is kept for half an hour; the step S4: when the temperature is reduced to 45 +/-1 ℃, the glue is released and tested, and the viscosity value of the glue is 2350.
Referring to fig. 1-3, this embodiment further provides a method for preparing an ultratransparent noiseless adhesive tape, including the following steps: step S1: preparing a release agent; step S2: conveying the BOPP film to a corona guide roller, adjusting proper impact current and voltage, and carrying out corona treatment on the back of the BOPP film; step S3: coating silicon oil, conveying the treated BOPP film to a silicon coating head for coating the silicon oil, allowing the silicon-coated BOPP film to pass through an ultraviolet irradiation channel of a machine table and finally to be cooled by a cooling roller, and winding the cooled silicon film by a winding guide roller for later use; step S4: preparing glue, preparing 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of initiator, sequentially adding the materials into a reaction kettle, stirring, keeping a certain temperature to perform chemical reaction on the materials, and preparing the ultra-transparent glue after the reaction is finished; step S5: gluing, namely taking the prepared ultra-transparent glue, drawing the cured ultra-transparent BOPP silicon film into a machine, conveying the ultra-transparent BOPP silicon film to a gluing head for gluing, drying the glue surface of the BOPP film by a machine oven under the action of high-temperature airflow after the glued BOPP film passes through the machine oven, and enabling the solvent to be quickly volatilized and recovered by a recovery system; s6: and cooling and winding, namely cooling by a cooling roller, and winding the cooled BOPP adhesive tape by a winding guide roller.
The embodiment further provides that: the step S1 includes a step S11: adding 95.7-98.8% of silicone oil, and stirring for 10-15 minutes at a stirring speed of 18-30 revolutions per minute; step S12: adding 1.2-4.3% of initiator, and stirring at the stirring speed of 18-30 r/min for 10-15 min.
The embodiment further provides that: in the step S1, solvent-free silicone oil ZD318 is used, and the ratio of silicone oil to initiator is 96.8: 3.2, the stirring speed is 25 rpm, and the stirring time is 15 minutes.
The embodiment further provides that: in the step S2, an ultra-transparent BOPP film with the thickness of 24-60um is adopted, the BOPP film is pulled into a machine table guide roller and is conveyed to a corona machine, the speed of the machine table is controlled to be 80-110 m/min, and the unreeling tension is controlled to be 1.5-3 Kgf; adjusting the output voltage of the corona machine to be 2-3.5KV, the output current to be 10-16A, and carrying out high-frequency high-voltage electric spark impact on the silicon-coated surface of the BOPP film.
The embodiment further provides that: step S3 is a non-direct coating process, wherein a release agent is coated on a rubber roller, and then the release agent is attached to a BOPP film through the attachment of the roller and the film; adding the prepared silicone oil between a first roller and a second roller of the coating head, controlling the quantitative amount of the silicone oil to be 0.2-0.5g/m by adjusting the speed ratio of a press roller, coating the quantitative silicone oil on a third roller, transferring the third roller and the fifth roller to the fourth roller and the fifth roller, and controlling the speed of a machine table to be 80-110 m/min; directly conveying the BOPP film subjected to corona treatment to a fifth roller, transferring silicon oil to the BOPP film through the fifth roller to finish the silicon coating process, wherein the temperatures of the first roller, the second roller and the third roller are controlled to be 20-30 ℃, and the temperatures of the fourth roller and the fifth roller are controlled to be 22-25 ℃; after the silicone oil is coated, the curing is finished through ultraviolet irradiation, and during the ultraviolet irradiation curing period of the BOPP film coated with the silicone oil, the film surface needs to be wrapped and filled with high-purity nitrogen; the wavelength of the ultraviolet lamp is between 220 and 365nm, and the irradiation energy of the lamp tube is controlled to be between 30 and 70 percent of the full power.
The embodiment further provides that: the step S5 includes a step S51 of gluing: drawing the cured BOPP silicon film into a machine guide roller, wherein the initial speed of the machine is 20-30 m/min, pumping the prepared glue into a glue groove, coating the glue by using a scraper, coating the glue on the glue coating surface of the film, controlling the glue coating amount and the uniformity by adjusting the gap between the scraper and a back glue roller, and controlling the glue amount to be 18-28g/m according to the product requirement2In the gluing stage, the machine table is not heated, the normal gluing speed of the machine table is increased to 50-70 m/min, and the unreeling tension is controlled to be 0.3-0.8 Kgf; step S52 drying and rolling: the BOPP film coated with the glue enters an oven drying and recycling system, eight oven sections are totally arranged, the temperature of the first oven section to the eight oven sections is controlled to be 50 +/-5 ℃, 60 +/-5 ℃, 70 +/-5 ℃, 80 +/-5 ℃, 95 +/-5 ℃, 90 +/-5 ℃ and 80 +/-5 ℃, and the adhesive tape is wound for dryingThe degree is controlled between 1-2%, and the rolling tension is controlled between 20-25 Kgf.
The embodiment further provides that: initial speed of 20 m/min, unwinding tension of 0.5Kgf, and coating weight of 22 +/-1 g/m2The normal gluing speed is 60 m/min, the temperatures of the oven in the first section to the eighth section are 50 +/-2 ℃, 60 +/-2 ℃, 70 +/-2 ℃, 80 +/-2 ℃, 95 +/-2 ℃, 90 +/-2 ℃ and 80 +/-2 ℃, the dryness of the rolling adhesive tape is 1.3 percent, and the rolling tension is 22 Kgf.
Referring to fig. 1-7, the present embodiment further provides an ultratransparent noiseless adhesive tape, which is characterized in that: the adhesive comprises a substrate layer, a release layer and a gluing layer, wherein the substrate layer adopts an ultra-transparent BOPP film with the haze of less than 0.4%, the release layer is formed by coating a solvent-free release agent on the back of the substrate layer, the solvent-free release agent comprises 95.7-98.8% of silicone oil and 1.2-4.3% of an initiator, the gluing layer adopts an acrylate adhesive, and the acrylate adhesive comprises 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of the initiator.
While the foregoing is directed to the preferred embodiment and mode of the invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An ultratransparent glue is characterized in that: comprises 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of initiator.
2. A preparation method of ultra-transparent glue is characterized by comprising the following steps: the method comprises the following steps: step S1: preparing 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of initiator, firstly adding the ethyl ester into a reaction kettle, starting stirring, controlling the stirring speed at 30-40 r/min, starting heating the reaction kettle, and keeping the temperature at 74-80 ℃; step S2: adding one fifth of isooctyl ester, vinyl acetate, acrylic acid and an initiator, sequentially adding the mixture into a reaction kettle, stirring at the speed of 30-40 revolutions per minute, slowly heating to 79-85 ℃, stopping heating when the reflux reaction is large, adding the remaining four fifths of isooctyl ester, vinyl acetate, acrylic acid and the initiator, finishing the addition within 30-50 minutes, keeping the temperature of the reaction kettle for 3-5 hours after the addition is finished, and keeping the temperature at 79-85 ℃; step S3: after the constant temperature reaction is finished, the stirring speed is reduced to 10-20 r/min, and the temperature of the reaction kettle is reduced to 69-75 ℃ and is kept for half an hour; step S4: and continuously cooling the reaction kettle, reducing the temperature to 44-50 ℃, stopping stirring, testing the viscosity value of the glue to be between 2000 and 2500, and pumping the glue from the reaction kettle to a glue storage tank for storage for later use.
3. The preparation method of the ultra-transparent glue according to claim 2, characterized in that: the step S1: the stirring speed of the reaction kettle is 30 revolutions per minute, and the initial temperature is 75 +/-1 ℃; the step S2: the temperature in the heat preservation stage is 80 +/-1 ℃, and the heat preservation is carried out for 4 hours; the step S3: the temperature is reduced to 70 +/-1 ℃ and is kept for half an hour; the step S4: when the temperature is reduced to 45 +/-1 ℃, the glue is released and tested, and the viscosity value of the glue is 2350.
4. A preparation method of an ultratransparent noiseless adhesive tape is characterized by comprising the following steps: the method comprises the following steps: step S1: preparing a release agent; step S2: conveying the BOPP film to a corona guide roller, adjusting proper impact current and voltage, and carrying out corona treatment on the back of the BOPP film; step S3: coating silicon oil, conveying the treated BOPP film to a silicon coating head for coating the silicon oil, allowing the silicon-coated BOPP film to pass through an ultraviolet irradiation channel of a machine table and finally to be cooled by a cooling roller, and winding the cooled silicon film by a winding guide roller for later use; step S4: preparing glue, preparing 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of initiator, sequentially adding the materials into a reaction kettle, stirring, keeping a certain temperature to perform chemical reaction on the materials, and preparing the ultra-transparent glue after the reaction is finished; step S5: gluing, namely taking the prepared ultra-transparent glue, drawing the cured ultra-transparent BOPP silicon film into a machine, conveying the ultra-transparent BOPP silicon film to a gluing head for gluing, drying the glue surface of the BOPP film by a machine oven under the action of high-temperature airflow after the glued BOPP film passes through the machine oven, and enabling the solvent to be quickly volatilized and recovered by a recovery system; s6: and cooling and winding, namely cooling by a cooling roller, and winding the cooled BOPP adhesive tape by a winding guide roller.
5. The method for preparing an ultratransparent noiseless adhesive tape according to claim 4, wherein: the step S1 includes a step S11: adding 95.7-98.8% of silicone oil, and stirring for 10-15 minutes at a stirring speed of 18-30 revolutions per minute; step S12: adding 1.2-4.3% of initiator, and stirring at the stirring speed of 18-30 r/min for 10-15 min.
6. The method for preparing an ultratransparent noiseless adhesive tape according to claim 5, wherein: in the step S1, solvent-free silicone oil ZD318 is used, and the ratio of silicone oil to initiator is 96.8: 3.2, the stirring speed is 25 rpm, and the stirring time is 15 minutes.
7. The method for preparing an ultratransparent noiseless adhesive tape according to claim 4, wherein: in the step S2, an ultra-transparent BOPP film with the thickness of 24-60um is adopted, the BOPP film is pulled into a machine table guide roller and is conveyed to a corona machine, the speed of the machine table is controlled to be 80-110 m/min, and the unreeling tension is controlled to be 1.5-3 Kgf; adjusting the output voltage of the corona machine to be 2-3.5KV, the output current to be 10-16A, and carrying out high-frequency high-voltage electric spark impact on the silicon-coated surface of the BOPP film.
8. The method for preparing an ultratransparent noiseless adhesive tape according to claim 4, wherein: step S3 is a non-direct coating process, wherein a release agent is coated on a rubber roller, and then the release agent is attached to a BOPP film through the attachment of the roller and the film; adding the prepared silicone oil between a first roller and a second roller of the coating head, controlling the quantitative amount of the silicone oil to be 0.2-0.5g/m by adjusting the speed ratio of a press roller, coating the quantitative silicone oil on a third roller, transferring the third roller and the fifth roller to the fourth roller and the fifth roller, and controlling the speed of a machine table to be 80-110 m/min; directly conveying the BOPP film subjected to corona treatment to a fifth roller, transferring silicon oil to the BOPP film through the fifth roller to finish the silicon coating process, wherein the temperatures of the first roller, the second roller and the third roller are controlled to be 20-30 ℃, and the temperatures of the fourth roller and the fifth roller are controlled to be 22-25 ℃; after the silicone oil is coated, the curing is finished through ultraviolet irradiation, and during the ultraviolet irradiation curing period of the BOPP film coated with the silicone oil, the film surface needs to be wrapped and filled with high-purity nitrogen; the wavelength of the ultraviolet lamp is 220-365hm, and the irradiation energy of the lamp tube is controlled to be 30-70% of the full power.
9. The method for preparing an ultratransparent noiseless adhesive tape according to claim 4, wherein: the step S5 includes a step S51 of gluing: drawing the cured BOPP silicon film into a machine guide roller, wherein the initial speed of the machine is 20-30 m/min, pumping the prepared glue into a glue groove, coating the glue by using a scraper, coating the glue on the glue coating surface of the film, controlling the glue coating amount and the uniformity by adjusting the gap between the scraper and a back glue roller, and controlling the glue amount to be 18-28g/m according to the product requirement2In the gluing stage, the machine table is not heated, the normal gluing speed of the machine table is increased to 50-70 m/min, and the unreeling tension is controlled to be 0.3-0.8 Kgf; step S52 drying and rolling: and (3) enabling the BOPP film coated with the glue to enter a drying and recycling system of an oven, wherein eight sections of ovens are arranged, the temperature of the first section of oven to the eighth section of oven is controlled to be 50 +/-5 ℃, 60 +/-5 ℃, 70 +/-5 ℃, 80 +/-5 ℃, 95 +/-5 ℃, 90 +/-5 ℃ and 80 +/-5 ℃, the dryness of the rolling adhesive tape is controlled to be 1-2%, and the rolling tension is controlled to be 20-25 Kgf.
10. An ultratransparent noiseless adhesive tape, which is characterized in that: the adhesive comprises a substrate layer, a release layer and a gluing layer, wherein the substrate layer adopts an ultra-transparent BOPP film with the haze of less than 0.4%, the release layer is formed by coating a solvent-free release agent on the back of the substrate layer, the solvent-free release agent comprises 95.7-98.8% of silicone oil and 1.2-4.3% of an initiator, the gluing layer adopts an acrylate adhesive, and the acrylate adhesive comprises 47.1-50.0% of ethyl ester, 43.0-45.0% of isooctyl ester, 4.0-5.0% of vinyl acetate, 2.0-2.9% of acrylic acid and 0.3-0.5% of the initiator.
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