CN112662330A - Preparation process of tensile solvent-resistant pressure-sensitive adhesive tape - Google Patents
Preparation process of tensile solvent-resistant pressure-sensitive adhesive tape Download PDFInfo
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- CN112662330A CN112662330A CN202011392992.9A CN202011392992A CN112662330A CN 112662330 A CN112662330 A CN 112662330A CN 202011392992 A CN202011392992 A CN 202011392992A CN 112662330 A CN112662330 A CN 112662330A
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Abstract
The invention belongs to the field of production of pressure-sensitive tapes, and particularly discloses a preparation process of a tensile solvent-resistant pressure-sensitive tape, wherein butyl acrylate and 2-ethylhexyl acrylate are used as soft monomers, methyl methacrylate is used as a hard monomer, epoxy resin is used as a modified monomer, acrylamide is used as an internal crosslinking agent, and benzoyl peroxide is used as an initiator to prepare the pressure-sensitive adhesive, so that the pressure-sensitive adhesive has good high-temperature resistance, and the high-temperature solvent resistance of the pressure-sensitive tape is improved; the method comprises the following steps of arranging a base material with a three-layer composite structure, using a PET film as a first film layer, weaving high stretch yarns into a net surface with a double-layer structure as a second film layer, and attaching the first film layer to the front side and the back side of the second film layer through an elastic adhesive, so that the formed base material has ultrahigh elasticity and a good tearing and pulling resistant effect; the multistage curing and drying device is provided for curing and drying the pressure-sensitive adhesive tape, the drying temperature of each drying section and the stroke size of each temperature section can be freely adjusted, and the drying requirements of various pressure-sensitive adhesives are met.
Description
Technical Field
The invention relates to the field of pressure-sensitive adhesive tape production, in particular to a preparation process of a tensile solvent-resistant pressure-sensitive adhesive tape.
Background
Pressure-sensitive adhesive tapes are a special type of tape made by applying a special adhesive (pressure-sensitive adhesive) to a strip-like substrate. The adhesive is composed of a pressure-sensitive adhesive, a base material, a primer, a back surface treating agent and the like. Pressure-sensitive adhesives are the most important components of pressure-sensitive adhesive tapes. The function of which is to give the adhesive tape pressure-sensitive adhesive properties. As the substrate, fabrics, plastic films, papers, etc. are mainly used. The primer is used for increasing the bonding strength of the pressure-sensitive adhesive and the base material. When in use, the adhesive tape is slightly pressed to be adhered to the surface of an adherend. Is widely used for packaging, electric insulation, medical treatment and health, label sticking, marking and the like. The performance of the existing pressure sensitive adhesive tape in the aspects of tensile resistance and high-temperature solvent resistance is not good enough, and needs to be improved.
Disclosure of Invention
The invention aims to provide a preparation process of a tensile solvent-resistant pressure-sensitive adhesive tape, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of a tensile solvent-resistant pressure-sensitive adhesive tape comprises the following specific steps:
s1: preparing a base material:
s11: taking a PET film as a first film layer, and cutting the PET film into required sizes for later use;
s12: weaving the high stretch yarn into a net surface with a double-layer structure by using a weaving mechanism to serve as a second film layer;
s13: coating elastic adhesive on the front and back surfaces of the second film layer, and attaching the first film layer on the front and back surfaces of the second film layer to form a substrate with a three-layer structure;
s2: preparing glue:
s21: the following raw materials are prepared according to the weight ratio: 80-120 parts of butyl acrylate, 15-25 parts of 2-ethylhexyl acrylate, 10-18 parts of methyl methacrylate, 2-6 parts of epoxy resin, 0.3-0.8 part of acrylamide, 0.2-0.7 part of benzoyl peroxide and the balance of mixed solvent of ethyl acetate and ethanol;
s22: adding a proper amount of mixed solvent of ethyl acetate and ethanol into a glue preparation container, sequentially adding butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate and epoxy resin into the mixed solvent under a stirring state, fully stirring and mixing, continuously adding acrylamide and benzoyl peroxide into the mixed solvent, and adjusting the viscosity of the mixed solvent by using the mixed solvent of ethyl acetate and ethanol to obtain glue;
s3: and uniformly coating the prepared glue on one side surface of the substrate, treating in a multistage curing and drying device for 4-7min to completely cure the glue, forming an elastic pressure-sensitive adhesive layer on the substrate, and attaching a layer of release paper on the surface of the pressure-sensitive adhesive layer to obtain the pressure-sensitive adhesive tape.
Preferably, in step S13, the elastic adhesive is glass cement and is composed of sodium silicate, acetic acid and organic silicone.
Preferably, in step S21, the weight ratio of each raw material is: 100 parts of butyl acrylate, 20 parts of 2-ethylhexyl acrylate, 13 parts of methyl methacrylate, 5 parts of epoxy resin, 0.6 part of acrylamide, 0.5 part of benzoyl peroxide and the balance of mixed solvent of ethyl acetate and ethanol.
Preferably, in step S3, after the glue is coated on the substrate, multi-stage drying is performed, and the drying temperatures of the stages are sequentially set as: 60 to 80 ℃, 90 to 100 ℃, 110 to 140 ℃, 100 to 120 ℃ and 60 to 80 ℃.
Preferably, the multistage curing and drying device comprises a transversely arranged drying channel, openings at two ends of the drying channel respectively form a feed inlet and a discharge outlet, a UV curing lamp tube is mounted on the inner wall of the top of the drying channel close to one end of the feed inlet, a hollow air guide box is mounted on the inner wall of the top of the drying channel close to one end of the discharge outlet, a circulating fan is arranged at the top of the drying channel, and the output end of the circulating fan is communicated with the air guide box.
Preferably, the middle part of the drying channel is set to be a multi-stage drying area, a plurality of hot air units are arranged on the drying channel in the multi-stage drying area at equal intervals, an air supply pipeline is transversely arranged inside the drying channel in the multi-stage drying area, the output end of each hot air unit is communicated with the air supply pipeline respectively, a plurality of air outlet cylinders are arranged on the air supply pipeline and the bottom surface of the air guide box at equal intervals, and an electromagnetic control valve is arranged on the air supply pipeline between every two adjacent air outlet cylinders.
Preferably, the air outlet barrel is internally provided with air outlet holes which are distributed in a radial shape.
Preferably, an integrated control panel is installed on the drying channel and is respectively connected with control ends of the UV curing lamp tube, the circulating fan, the hot air unit and the electromagnetic control valve.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the pressure-sensitive adhesive is prepared by using the combination of butyl acrylate and 2-ethylhexyl acrylate as soft monomers, methyl methacrylate as hard monomers, epoxy resin as modified monomers, acrylamide as an internal crosslinking agent and benzoyl peroxide as an initiator, so that the pressure-sensitive adhesive has good high temperature resistance, and the high temperature solvent resistance of the pressure-sensitive adhesive tape is improved; set up three-layer composite structure's substrate, utilize the PET film as first rete, weave into bilayer structure's wire netting as the second rete with high stretch yarn to laminate first rete on second rete tow sides through the elasticity adhesive, make the substrate that forms have ultrahigh elasticity, anti tearing draw effectually.
2. The invention provides a multi-stage curing and drying device for curing and drying a pressure-sensitive adhesive tape, which integrates UV curing, hot air curing and natural wind transition and ensures the curing effect of the pressure-sensitive adhesive; set up multistage drying region, utilize a plurality of hot-blast units's cooperation, can freely adjust the stoving temperature of each section of drying, install a plurality of solenoid electric valves on supply-air duct, can adjust the stroke size of each temperature section through opening and close of control solenoid electric valve, adapt to the stoving needs of multiple pressure-sensitive adhesive, the flexibility is high, and application scope is wide.
Drawings
Fig. 1 is a schematic structural diagram of a multistage curing and drying device of the present invention.
In the figure: 1. a drying channel; 2. a feed inlet; 3. a discharge port; 4. a UV curing lamp; 5. a wind guide box; 6. a circulating fan; 7. a multi-stage drying zone; 8. a hot air unit; 9. an air supply duct; 10. an air outlet cylinder; 11. an electromagnetic control valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1: the invention provides a technical scheme that: a preparation process of a tensile solvent-resistant pressure-sensitive adhesive tape comprises the following specific steps:
s1: preparing a base material:
s11: taking a PET film as a first film layer, and cutting the PET film into required sizes for later use;
s12: weaving the high stretch yarn into a net surface with a double-layer structure by using a weaving mechanism to serve as a second film layer;
s13: coating elastic adhesive on the front and back surfaces of the second film layer, and attaching the first film layer on the front and back surfaces of the second film layer to form a substrate with a three-layer structure;
s2: preparing glue:
s21: the following raw materials are prepared according to the weight ratio: 80-120 parts of butyl acrylate, 15-25 parts of 2-ethylhexyl acrylate, 10-18 parts of methyl methacrylate, 2-6 parts of epoxy resin, 0.3-0.8 part of acrylamide, 0.2-0.7 part of benzoyl peroxide and the balance of mixed solvent of ethyl acetate and ethanol;
s22: adding a proper amount of mixed solvent of ethyl acetate and ethanol into a glue preparation container, sequentially adding butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate and epoxy resin into the mixed solvent under a stirring state, fully stirring and mixing, continuously adding acrylamide and benzoyl peroxide into the mixed solvent, and adjusting the viscosity of the mixed solvent by using the mixed solvent of ethyl acetate and ethanol to obtain glue;
s3: and uniformly coating the prepared glue on one side surface of the substrate, treating in a multistage curing and drying device for 4-7min to completely cure the glue, forming an elastic pressure-sensitive adhesive layer on the substrate, and attaching a layer of release paper on the surface of the pressure-sensitive adhesive layer to obtain the pressure-sensitive adhesive tape.
In this embodiment, in step S13, the elastic adhesive is glass cement and is composed of sodium silicate, acetic acid and organic silicone.
In this embodiment, in step S21, the optimal weight ratio of each raw material is: 100 parts of butyl acrylate, 20 parts of 2-ethylhexyl acrylate, 13 parts of methyl methacrylate, 5 parts of epoxy resin, 0.6 part of acrylamide, 0.5 part of benzoyl peroxide and the balance of mixed solvent of ethyl acetate and ethanol; the pressure-sensitive adhesive prepared by the compounding ratio has the best comprehensive performance and obvious high temperature resistance.
In this embodiment, in step S3, after the glue is coated on the substrate, multi-stage drying is performed, and the drying temperatures of the stages are sequentially set as: 60 to 80 ℃, 90 to 100 ℃, 110 to 140 ℃, 100 to 120 ℃ and 60 to 80 ℃.
The pressure-sensitive adhesive is prepared by using the combination of butyl acrylate and 2-ethylhexyl acrylate as soft monomers, methyl methacrylate as hard monomers, epoxy resin as modified monomers, acrylamide as an internal crosslinking agent and benzoyl peroxide as an initiator, has good high-temperature resistance, and improves the high-temperature solvent resistance of the pressure-sensitive adhesive tape; the method comprises the following steps of arranging a base material with a three-layer composite structure, using a PET film as a first film layer, weaving high stretch yarns into a net surface with a double-layer structure as a second film layer, and attaching the first film layer to the front side and the back side of the second film layer through an elastic adhesive, so that the formed base material has ultrahigh elasticity and a good tearing and pulling resistant effect; and the curing effect of the pressure-sensitive adhesive layer is effectively ensured by utilizing a multistage drying process.
Example 2: referring to fig. 1, the multi-stage curing and drying device includes a drying channel 1 transversely disposed, openings at two ends of the drying channel 1 respectively form a feeding port 2 and a discharging port 3, a UV curing lamp tube 4 is mounted on an inner wall of a top portion of the drying channel adjacent to one end of the feeding port 2, an air guide box 5 of a hollow structure is mounted on an inner wall of a top portion of the drying channel adjacent to one end of the discharging port 3, a circulating fan 6 is disposed at a top portion of the drying channel 1, and an output end of the circulating fan 6 is communicated.
In this embodiment, drying channel 1 middle part sets up to multistage drying district 7, and drying channel 1 in the multistage drying district 7 is equidistant to have laid a plurality of hot-blast units 8, and drying channel 1 inside in the multistage drying district 7 transversely is provided with a supply-air duct 9, and each hot-blast unit 8's output communicates with supply-air duct 9 respectively, and a plurality of play dryer 10 are installed to the impartial interval in supply- air duct 9 and 5 bottom surfaces of wind-guiding box, installs solenoid electric valve 11 on supply-air duct 9 between two adjacent play dryer 10.
In this embodiment, the air outlet duct 10 is provided with air outlet holes distributed radially.
In this embodiment, the drying channel 1 is provided with an integrated control panel, and the integrated control panel is respectively connected with the control ends of the UV curing lamp tube 4, the circulating fan 6, the hot air unit 8 and the electromagnetic control valve 11.
The working principle is as follows: when the electric equipment works, the electric equipment is powered by an external power supply.
The pressure-sensitive adhesive tape after being coated with the adhesive passes through the drying channel 1 under the traction of the traction device, and moves forward from the feed inlet 2 to the discharge outlet 3, and the coated surface is irradiated by the UV curing lamp tube 4 and polymerized and cured; then the hot air enters a multi-stage drying area 7 for drying, and the air outlet temperature of each hot air unit 8 is set in sequence along the advancing direction of the pressure sensitive adhesive tape as follows: the curing effect of the pressure-sensitive adhesive layer is ensured by forming a temperature gradient state of gradually increasing the temperature and then gradually reducing the temperature at 60-80 ℃, 90-100 ℃, 110-140 ℃, 100-120 ℃ and 60-80 ℃; finally, natural wind cooling is carried out through the circulating fan 6, and subsequent processing is facilitated.
An electromagnetic control valve 11 is arranged between two adjacent air outlet cylinders 10 on the air supply pipeline 9, and the length of the communication between the air supply pipeline 9 and different hot air units 8 can be adjusted by controlling the opening and closing of each electromagnetic control valve 11, so that the stroke size of each temperature section is adjusted, the drying requirements of various pressure-sensitive adhesives are met, the flexibility is high, and the application range is wide.
It is worth noting that: whole multistage solidification drying device realizes control through the control button on the integrated control panel to it, because the equipment that control button matches is equipment commonly used, belongs to current mature technology, no longer gives unnecessary details its electric connection relation and specific circuit structure here.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A preparation process of a tensile solvent-resistant pressure-sensitive adhesive tape is characterized by comprising the following specific steps:
s1: preparing a base material:
s11: taking a PET film as a first film layer, and cutting the PET film into required sizes for later use;
s12: weaving the high stretch yarn into a net surface with a double-layer structure by using a weaving mechanism to serve as a second film layer;
s13: coating elastic adhesive on the front and back surfaces of the second film layer, and attaching the first film layer on the front and back surfaces of the second film layer to form a substrate with a three-layer structure;
s2: preparing glue:
s21: the following raw materials are prepared according to the weight ratio: 80-120 parts of butyl acrylate, 15-25 parts of 2-ethylhexyl acrylate, 10-18 parts of methyl methacrylate, 2-6 parts of epoxy resin, 0.3-0.8 part of acrylamide, 0.2-0.7 part of benzoyl peroxide and the balance of mixed solvent of ethyl acetate and ethanol;
s22: adding a proper amount of mixed solvent of ethyl acetate and ethanol into a glue preparation container, sequentially adding butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate and epoxy resin into the mixed solvent under a stirring state, fully stirring and mixing, continuously adding acrylamide and benzoyl peroxide into the mixed solvent, and adjusting the viscosity of the mixed solvent by using the mixed solvent of ethyl acetate and ethanol to obtain glue;
s3: and uniformly coating the prepared glue on one side surface of the substrate, treating in a multistage curing and drying device for 4-7min to completely cure the glue, forming an elastic pressure-sensitive adhesive layer on the substrate, and attaching a layer of release paper on the surface of the pressure-sensitive adhesive layer to obtain the pressure-sensitive adhesive tape.
2. The process for preparing a tensile solvent-resistant pressure-sensitive adhesive tape according to claim 1, wherein: in step S13, the elastic adhesive is glass cement, and is composed of sodium silicate, acetic acid, and organic silicone.
3. The process for preparing a tensile solvent-resistant pressure-sensitive adhesive tape according to claim 1, wherein: in step S21, the weight ratio of each raw material is: 100 parts of butyl acrylate, 20 parts of 2-ethylhexyl acrylate, 13 parts of methyl methacrylate, 5 parts of epoxy resin, 0.6 part of acrylamide, 0.5 part of benzoyl peroxide and the balance of mixed solvent of ethyl acetate and ethanol.
4. The process for preparing a tensile solvent-resistant pressure-sensitive adhesive tape according to claim 1, wherein: in step S3, after the glue is coated on the substrate, multi-stage drying is performed, and the drying temperatures at each stage are set as: 60 to 80 ℃, 90 to 100 ℃, 110 to 140 ℃, 100 to 120 ℃ and 60 to 80 ℃.
5. The process for preparing a tensile solvent-resistant pressure-sensitive adhesive tape according to claim 1, wherein: multistage solidification drying device is including horizontal stoving passageway (1) that sets up, stoving passageway (1) both ends opening forms feed inlet (2) and discharge gate (3) respectively, and its top inner wall installation UV solidification fluorescent tube (4) that is close to feed inlet (2) one end, and its top inner wall installation hollow structure's that is close to discharge gate (3) one end lead bellows (5), and stoving passageway (1) top is provided with circulating fan (6), and the output and the lead bellows (5) intercommunication of circulating fan (6).
6. The process for preparing a tensile solvent-resistant pressure-sensitive adhesive tape according to claim 5, wherein: drying passageway (1) middle part sets up to multistage drying district (7), a plurality of hot-blast units (8) have been laid to equidistant on drying passageway (1) in multistage drying district (7), drying passageway (1) inside in multistage drying district (7) transversely is provided with a supply-air duct (9), the output of each hot-blast unit (8) communicates with supply-air duct (9) respectively, a plurality of play dryer (10) are installed to the impartial interval in supply-air duct (9) and wind-guiding case (5) bottom surface, install solenoid electric valve (11) on supply-air duct (9) between two adjacent play dryer (10).
7. The process for preparing a tensile solvent-resistant pressure-sensitive adhesive tape according to claim 6, wherein: the air outlet cylinder (10) is internally provided with air outlet holes which are distributed in a radial shape.
8. The process for preparing a tensile solvent-resistant pressure-sensitive adhesive tape according to claim 5, wherein: and an integrated control panel is arranged on the drying channel (1), and is respectively connected with the control ends of the UV curing lamp tube (4), the circulating fan (6), the hot air unit (8) and the electromagnetic control valve (11).
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| CN202011392992.9A CN112662330A (en) | 2020-12-02 | 2020-12-02 | Preparation process of tensile solvent-resistant pressure-sensitive adhesive tape |
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| CN202011392992.9A CN112662330A (en) | 2020-12-02 | 2020-12-02 | Preparation process of tensile solvent-resistant pressure-sensitive adhesive tape |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561167A (en) * | 2022-03-02 | 2022-05-31 | 合肥中科松为科技有限公司 | Preparation method of degradable environment-friendly non-silicon pressure-sensitive adhesive tape |
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2020
- 2020-12-02 CN CN202011392992.9A patent/CN112662330A/en active Pending
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| CN101619199A (en) * | 2008-07-03 | 2010-01-06 | 李俊辉 | Manufacture technique of easy tear tape |
| CN208219032U (en) * | 2018-04-23 | 2018-12-11 | 赛得利(九江)纤维有限公司 | Drying and regulating device for viscose rayon |
| CN110564331A (en) * | 2019-09-24 | 2019-12-13 | 苏州世华新材料科技股份有限公司 | Preparation method of elastic pressure-sensitive adhesive tape and elastic pressure-sensitive adhesive tape |
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| CN114561167A (en) * | 2022-03-02 | 2022-05-31 | 合肥中科松为科技有限公司 | Preparation method of degradable environment-friendly non-silicon pressure-sensitive adhesive tape |
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