CN117004064B - Special polyester film for shallow screen printing and preparation process thereof - Google Patents
Special polyester film for shallow screen printing and preparation process thereof Download PDFInfo
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- CN117004064B CN117004064B CN202311018223.6A CN202311018223A CN117004064B CN 117004064 B CN117004064 B CN 117004064B CN 202311018223 A CN202311018223 A CN 202311018223A CN 117004064 B CN117004064 B CN 117004064B
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- 229920006267 polyester film Polymers 0.000 title claims abstract description 85
- 238000007650 screen-printing Methods 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 48
- 239000000047 product Substances 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 239000002216 antistatic agent Substances 0.000 claims abstract description 24
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920000728 polyester Polymers 0.000 claims abstract description 18
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 17
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 17
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 15
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims abstract description 15
- 239000003381 stabilizer Substances 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000011265 semifinished product Substances 0.000 claims abstract description 13
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 9
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 9
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 24
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 18
- 230000003068 static effect Effects 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical group O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 6
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical group CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 239000004611 light stabiliser Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000013135 deep learning Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 2
- 235000010354 butylated hydroxytoluene Nutrition 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000007639 printing Methods 0.000 abstract description 14
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 16
- 230000006872 improvement Effects 0.000 description 10
- 230000000630 rising effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 150000005621 tetraalkylammonium salts Chemical class 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N toluene Substances CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000013136 deep learning model Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006146 polyetheresteramide block copolymer Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
-
- 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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/08—Cellulose derivatives
- C08J2401/26—Cellulose ethers
- C08J2401/28—Alkyl ethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention relates to the technical field of polyester film preparation, in particular to a special polyester film for shallow screen printing and a preparation process thereof. Comprising the following steps: putting ethylene glycol and terephthalic acid into a reaction kettle, adding a catalyst into the reaction kettle, heating to a preset temperature, and carrying out a polyesterification reaction to obtain polyethylene terephthalate; uniformly mixing polyethylene glycol terephthalate, nano silicon dioxide, a filler, a stabilizer, an antistatic agent, a tackifier and an antioxidant, and heating to a molten state to obtain a polyester; extruding the polyester into a film by an extruder, and carrying out electrostatic adsorption and cooling on the extruded film to obtain a polyester film semi-finished product; carrying out biaxial stretching treatment on the obtained semi-finished polyester film to obtain a finished polyester film; and (3) carrying out quality detection, slitting and packaging on the polyester film finished product obtained after the stretching treatment to obtain the special polyester film for shallow screen printing. The invention improves the adhesive force, the electric conductivity and the antistatic property of the printing ink on the surface of the polyester film.
Description
Technical Field
The invention relates to the technical field of polyester film preparation, in particular to a special polyester film for shallow screen printing and a preparation process thereof.
Background
With the development of modern technology, printing technology has become an indispensable part of many industries. The shallow screen printing technology is widely applied and is suitable for printing on the surfaces of various materials. The printing is carried out by using a shallow screen printing plate, and the mesh depth of the printing plate is shallow, usually about 20 microns. Compared with the traditional deep-screen printing plate, the printing plate has the characteristics of small mesh, fine lines, small granularity and the like.
The shallow screen printing technology is mainly suitable for producing printed matters with simple patterns, less color numbers and large printing quantity, and has the main advantages of bright color, high precision, strong color layering sense and the like. Meanwhile, the manufacturing process of the shallow screen printing plate is relatively simple and low in cost, so that the technology is widely applied to the printing fields of industries such as electronics, glass, ceramics, plastics and the like. In shallow screen printing, a polyester film is taken as an important base material, and the requirement of the shallow screen printing on the adhesive force of ink is relatively high, however, in the traditional polyester film preparation process, the performance requirements of fine flatness, antistatic capability, ink adhesive force and the like cannot be met well due to the characteristics of polyester materials and the limitation of a film forming method.
Disclosure of Invention
In order to meet the requirements of the shallow screen printing industry on high-performance printing base materials, a new solution is necessary to be searched for at least improving one of the performances of fine flatness, antistatic capability, ink adhesion and the like of the special polyester film for shallow screen printing.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
the first aspect of the invention provides a preparation process of a special polyester film for shallow screen printing, which comprises the following steps:
(1) Putting ethylene glycol and terephthalic acid into a reaction kettle, adding a catalyst into the reaction kettle, heating to a preset temperature, and carrying out a polyesterification reaction to obtain polyethylene terephthalate;
(2) Uniformly mixing polyethylene glycol terephthalate, nano silicon dioxide, a filler, a stabilizer, an antistatic agent, a tackifier and an antioxidant, and heating to a molten state to obtain a polyester;
(3) Extruding the polyester into a film by an extruder, and carrying out electrostatic adsorption and cooling on the extruded film to obtain a polyester film semi-finished product;
(4) Carrying out biaxial stretching treatment on the obtained semi-finished polyester film to obtain a finished polyester film;
(5) And (3) carrying out quality detection, slitting and packaging on the finished polyester film obtained after the stretching treatment to obtain the special polyester film for shallow screen printing, and recycling the produced edge film in the slitting process.
A further improvement is that in step (3), the method for obtaining the semi-finished product of the polyester film after electrostatic absorption and cooling of the extruded film comprises the following steps:
attaching the membrane to a roller way cooling device by utilizing electrostatic adsorption, and cooling by a roller way at a set temperature and a set speed to reduce the temperature of the membrane and promote the solidification of the membrane to form a polyester film semi-finished product;
the output voltage range of the high-voltage generator adopted by the electrostatic adsorption is 6-12KV, the adopted electrostatic adsorption wires are steel belts, the width of the steel belts is 3-6mm, the thickness of the steel belts is 0.05-0.08mm, and the temperature of the roller way is 25-30 ℃.
The further improvement is that in the step (4), the method for carrying out biaxial stretching treatment on the obtained polyester film semi-finished product comprises the following steps:
placing the semi-finished polyester film on stretching equipment for longitudinal stretching and transverse stretching respectively, wherein the transverse stretching rate is 4-5 times and the longitudinal stretching rate is 3-4 times; and (3) detecting the thickness of the biaxially oriented polyester film by using a thickness measuring instrument so as to ensure that the biaxially oriented polyester film meets the thickness standard requirement, and finally, carrying out traction, edge cutting and rolling to obtain a polyester film finished product, wherein in addition, waste materials obtained by film breaking and edge cutting also need to be recycled in the process.
The further improvement is that in the step (2), the mass parts of the components are as follows: 80-100 parts of polyethylene terephthalate, 5-8 parts of nano silicon dioxide, 5-10 parts of filler, 0.05-0.2 part of antioxidant, 0.1-0.5 part of stabilizer, 2-5 parts of antistatic agent and 2-5 parts of tackifier.
The further improvement is that the filler is talcum powder or calcium carbonate, the antioxidant is 2, 6-di-tert-butyl P-cresol or 3-tert-butyl-4-hydroxycinnamaldehyde, the stabilizer is a UV-P light stabilizer, the antistatic agent is polyether type antistatic agent or ionic type antistatic agent, and the tackifier is hydroxyethyl methyl cellulose.
The thickness measuring instrument is an infrared thickness measuring instrument, the infrared thickness measuring instrument transmits data of scanning detection thickness to a screen of an industrial personal computer for display, and the displayed data comprise longitudinal section thickness data and transverse section thickness data of the polyester film and transverse section average thickness trend.
In the step (5), the quality detection of the finished polyester film obtained after the stretching treatment comprises the following steps: the on-line detection system is used for monitoring the bubble condition on the surface of the film, the on-line detection system comprises a high-precision optical sensor and an image processing module, the optical sensor acquires optical information on the surface of the film in real time and transmits the optical information to the image processing module, the image processing module identifies and positions the bubble based on a target detection algorithm of deep learning, the acquired optical information is analyzed in real time, the bubble on the surface of the film is accurately identified, the bubble information is transmitted to the display platform in real time, the display platform displays the bubble information according to the received bubble information, meanwhile, when the number of detected bubbles exceeds a preset threshold value, the system automatically alarms to remind operators to check and process, and in addition, the display platform also records the position and the number of the bubble, so that references are provided for optimizing the production process.
A further improvement is that an electrostatic eliminator is provided in the peripheral area of the optical sensor for avoiding false alarm sources of bubbles after dust particles and moisture in the air are adsorbed by the static electricity, thereby improving bubble recognition accuracy, and for reducing the influence of the static electricity generated in the film production process on the electron transmission of the optical sensor, thereby avoiding distortion of measurement data.
In the step (1), the temperature rising to the preset temperature is carried out in a gradual temperature rising mode, the temperature rising is divided into a plurality of stages, the temperature rising speed is controlled, the temperature range is increased at intervals, the temperature in the reaction kettle is required to be stabilized for a period of time when each temperature rising stage is finished, the temperature rising is carried out in the next stage until the heat of the raw materials in the reaction kettle is uniformly distributed, the preset temperature is reached, excessive bubbles are prevented from being formed due to the excessively rapid temperature rising, and the product quality is ensured; meanwhile, an isolating layer is additionally arranged around the reaction kettle and used for reducing air convection near the reaction kettle, so that the loss and fluctuation of the temperature of the reaction kettle caused by the surrounding air convection are prevented.
The second aspect of the invention provides a special polyester film for shallow screen printing, which is prepared by the preparation process of the special polyester film for shallow screen printing in any one of the first aspect.
The beneficial effects of the invention are at least as follows:
according to the invention, the nano silicon dioxide is added into the polyester, so that the surface of the film is fine and smooth as much as possible on the premise of solving the problem of the film opening travelling performance, and the polyester film is more suitable for shallow screen printing.
According to the invention, the tackifier (hydroxyethyl methyl cellulose) is added into the polyester, and the hydroxyethyl methyl cellulose is a high molecular compound, has good adhesiveness and adsorptivity, and can form a fine adhesive layer on the surface of the polyester film, and the adhesive layer can improve the adhesion between the printing ink and the polyester film, so that the peeling or falling of the printing ink is effectively reduced. The hydroxyethyl methyl cellulose has good thickening and adhesion properties, so that the mixed materials are more uniform in the material processing process, the mechanical properties inside the film are effectively improved, and the hydroxyethyl methyl cellulose can be used for improving the tensile strength of the polyester film.
According to the invention, the antistatic agent is added into the polyester, so that a microscopic conductive network can be formed on the surface of the polyester film or charge evasion accumulation can be dissipated, the conductive performance and antistatic performance of the polyester film are improved, and the purposes of reducing or inhibiting static generation and avoiding interference from external static are achieved.
According to the invention, the bubble condition on the surface of the film is monitored in real time by adopting the online detection system, so that the accuracy and timeliness of bubble monitoring are improved, the error of manual inspection is reduced, meanwhile, when the number of detected bubbles exceeds the preset threshold value, the system automatically alarms to remind operators to inspect and process, in addition, the display platform also records the positions and the number of the bubbles, so that the position where the bubbles appear is known to be easier to appear, and a reference is provided for optimizing the production process.
According to the invention, the static eliminator is arranged in the peripheral area of the optical sensor, so that false alarm sources of bubbles are avoided after dust particles and moisture in the air are adsorbed by static electricity, the bubble identification accuracy is improved, and the influence of static electricity generated in the film production process on the electronic transmission of the optical sensor is reduced, so that the distortion of measurement data is avoided.
Drawings
FIG. 1 is a flow chart of a process for preparing a polyester film special for shallow screen printing.
Detailed Description
The present invention will be further described in detail with reference to the following examples, which are only for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1:
the embodiment provides a special polyester film for shallow screen printing, which comprises the following components in percentage by mass: 80 parts of polyethylene terephthalate (PET), 5 parts of nano silicon dioxide, 5 parts of filler, 0.05 part of antioxidant, 0.1 part of stabilizer, 2 parts of antistatic agent and 2 parts of tackifier.
The manufacturing method of the polyethylene terephthalate (PET) comprises the following steps: a predetermined amount of ethylene glycol and terephthalic acid are added to a reaction vessel in a molar ratio of 1:1, and a catalyst is added to the reaction vessel for promoting the progress of the polyesterification reaction. The catalyst is titanate compound, such as isopropyl titanate, and the dosage of the catalyst is 0.1% of the total weight of the reactants.
The filler is talcum powder, the antioxidant is 2, 6-di-tert-butyl-P-toluene phenol, the stabilizer is UV-P light stabilizer, the antistatic agent can be polyether type antistatic agent or ionic type antistatic agent, wherein the polyether type antistatic agent can be polyether imide, polyether ester amide, polyethylene oxide, methyl acrylate and the like, the ionic type antistatic agent can be tetraalkylammonium salt, alkylbenzene sulfonate, tetrabutylammonium bromide, sodium methylbenzenesulfonate and the like, the tetraalkylammonium salt is adopted in the embodiment, and the tackifier is hydroxyethyl methylcellulose.
The hydroxyethyl methyl cellulose is a high molecular compound, has good adhesiveness and adsorptivity, and can form a fine adhesive layer with the surface of the polyester film, and the adhesive layer can improve the adhesion between the printing ink and the polyester film, so that the peeling or falling of the printing ink is effectively reduced. The hydroxyethyl methyl cellulose has good thickening and adhesion properties, so that the mixed materials are more uniform in the material processing process, the mechanical properties inside the film are effectively improved, and the hydroxyethyl methyl cellulose can be used for improving the tensile strength of the polyester film.
As shown in fig. 1, the preparation method comprises the following steps:
step S1, putting ethylene glycol and terephthalic acid into a reaction kettle, adding a catalyst into the reaction kettle, and heating to a preset temperature for a polyesterification reaction to obtain polyethylene terephthalate. Specifically, when the polyesterification reaction is carried out, the temperature of the reaction system is raised to 260 ℃ and kept for 3 hours to fully carry out the polymerization reaction, and after the reaction is finished, the polyethylene terephthalate is obtained.
Step S2, uniformly mixing polyethylene glycol terephthalate, a filler, a stabilizer, a tackifier, an antioxidant and an antistatic agent, and heating to a molten state to obtain a polyester, wherein the specific process is as follows:
80 parts of polyethylene terephthalate (PET) are sequentially added with 5 parts of filler (talcum powder), 0.05 part of antioxidant (2, 6-di-tert-butyl-P-toluene phenol), 0.1 part of stabilizer (UV-P light stabilizer), 2 parts of tackifier (hydroxyethyl methylcellulose) and 2 parts of antistatic agent (tetraalkylammonium salt) under stirring, and stirring and heating are continued until the mixture is molten to obtain polyester.
And S3, extruding the polyester into a film by an extruder, and carrying out electrostatic adsorption and cooling on the extruded film to obtain a semi-finished product of the polyester film.
The specific process of extruding the polyester into the film sheet through the extruder is as follows:
the mixed polyester is fed into an extruder, and the polyester is extruded into a required film-like film sheet at a die head by adjusting the operation parameters (such as temperature, speed, pressure and the like) of the extruder.
The specific process of obtaining the polyester film semi-finished product after electrostatic adsorption and cooling of the extruded film is as follows:
attaching the membrane to a roller way cooling device by utilizing electrostatic adsorption, and cooling by a roller way at a set temperature and a set speed to reduce the temperature of the membrane and promote the solidification of the membrane to form a polyester film semi-finished product;
the output voltage range of the high-voltage generator adopted by the electrostatic adsorption is 6-12KV, the adopted electrostatic adsorption wires are steel belts, the width of the steel belts is 3-6mm, the thickness of the steel belts is 0.05-0.08mm, and the temperature of the roller way is 25-30 ℃.
By adopting the flat strip-shaped steel belt, the tensile strength can be improved relative to the steel wire, so that the tension of the steel belt can be improved, the shake is eliminated, and the diaphragm can be stably and continuously attached to the roller way.
And S4, carrying out biaxial stretching treatment on the obtained semi-finished polyester film to obtain a finished polyester film, so that the semi-finished polyester film has a certain stretching rate.
Specifically, the method for carrying out biaxial stretching treatment on the obtained polyester film semi-finished product comprises the following steps: placing the semi-finished polyester film on stretching equipment for longitudinal stretching and transverse stretching respectively, wherein the transverse stretching rate is 4-5 times and the longitudinal stretching rate is 3-4 times; and (3) detecting the thickness of the biaxially oriented polyester film by using a thickness measuring instrument so as to ensure that the biaxially oriented polyester film meets the thickness standard requirement, and finally, carrying out traction, edge cutting and rolling to obtain a polyester film finished product, wherein in addition, waste materials obtained by film breaking and edge cutting also need to be recycled in the process. It should be noted that the strength is ensured to be uniform when the polyester film is stretched, so that defects or breakage are avoided.
The thickness measuring instrument is an infrared thickness measuring instrument, the infrared thickness measuring instrument transmits data of scanning detection thickness to a screen of the industrial personal computer for display, and the displayed data comprise longitudinal and transverse section thickness data and transverse section average thickness trend of the polyester film.
And S5, carrying out quality detection, slitting and packaging on the finished polyester film obtained after the stretching treatment to obtain the special polyester film for shallow screen printing, and recycling the produced edge film in the slitting process.
Example 2:
example 2 was further modified on the basis of example 1 in that the proportions of the components were different, and the rest of the preparation method was the same as that of example 1, specifically, in this example, the following mass ratio components were included: 90 parts of polyethylene terephthalate (PET), 7 parts of nano silicon dioxide, 7 parts of filler, 0.1 part of antioxidant, 0.2 part of stabilizer, 3 parts of tackifier and 3 parts of antistatic agent.
Wherein the filler is talcum powder, the antioxidant is 2, 6-di-tert-butyl-P-toluene phenol, the stabilizer is UV-P light stabilizer, the tackifier is hydroxyethyl methyl cellulose, and the antistatic agent is tetraalkylammonium salt.
Example 3:
example 3 was a further improvement over example 1 in that the proportions of the components were varied, and the remaining preparation was the same as example 1, in particular, in this example, the following mass ratios were included: 100 parts of polyethylene terephthalate (PET), 8 parts of nano silicon dioxide, 10 parts of filler, 0.2 part of antioxidant, 0.5 part of stabilizer, 5 parts of tackifier and 5 parts of antistatic agent.
Wherein the filler is talcum powder, the antioxidant is 2, 6-di-tert-butyl-P-toluene phenol, the stabilizer is UV-P light stabilizer, the tackifier is hydroxyethyl methyl cellulose, and the antistatic agent is tetraalkylammonium salt.
Comparative example 1:
comparative example 1 was different from example 1 in that no tackifier (hydroxyethyl methylcellulose) was added, and the other preparation methods were the same as in example 1.
Comparative example 2:
comparative example 2 was different from example 2 in that no tackifier (hydroxyethyl methylcellulose) was added, and the other preparation methods were the same as example 2.
Comparative example 3:
comparative example 3 was different from example 3 in that no tackifier (hydroxyethyl methylcellulose) was added, and the other preparation methods were the same as example 3.
And (3) performance detection: the products obtained in examples 1 to 3 and comparative examples 1 to 3 were respectively subjected to tensile strength test, wherein the tensile strength was measured by means of a tensile test at a test speed of 100mm/min, the sample size of 150 mm. Times.15 mm, and the test temperature of 23 ℃.
The test results are shown in table 1 below.
TABLE 1
From the experimental data in Table 1, it can be seen that the tensile strength of the product of example 1 is improved relative to the tensile strength of the product of comparative example 1, the tensile strength of the product of example 2 is improved relative to the tensile strength of the product of comparative example 2, and the tensile strength of the product of example 3 is improved relative to the tensile strength of the product of comparative example 3, due to the addition of the tackifier (hydroxyethyl methylcellulose).
In addition, the samples prepared in examples 1 to 3 and comparative examples 1 to 3 were respectively subjected to ink adhesion tests by means of tape peelability tests, the tape used in the tests was 3MScotchTape manufactured by 3M company, the products prepared in examples 1 to 3 and comparative examples 1 to 3 were first printed with the same ink pattern, and then respectively adhered with standardized 3MScotchTape on the surface, and then the tape was peeled at a fixed angle and speed, and the adhesion of the ink by the tape was observed, and after many comparative tests, it was found that the ink adhesion of the product prepared in example 1 was good relative to the product prepared in comparative example 1, and the ink adhesion of the product prepared in example 2 was good relative to the product prepared in comparative example 2, and the ink adhesion of the product prepared in example 3 was good relative to the product prepared in comparative example 3. The invention is illustrated that the adhesion of the printing ink on the surface of the polyester film is improved by adding the tackifier (hydroxyethyl methyl cellulose).
Example 4:
example 4 is a further improvement over example 1 in that in step S5, the quality detection of the polyester film finished product obtained after the stretching treatment includes: the on-line detection system is used for monitoring the bubble condition on the surface of the film, the on-line detection system comprises a high-precision optical sensor and an image processing module, the optical sensor acquires optical information on the surface of the film in real time and transmits the optical information to the image processing module, the image processing module identifies and positions the bubble based on a target detection algorithm of deep learning, the acquired optical information is analyzed in real time, the bubble on the surface of the film is accurately identified, the bubble information is transmitted to the display platform in real time, the display platform displays the bubble information according to the received bubble information, meanwhile, when the number of detected bubbles exceeds a preset threshold value, the system automatically alarms to remind operators to check and process, and in addition, the display platform records the position and the number of the bubble, so that the position is known to be easier to appear, and a reference is provided for optimizing the production process.
The invention utilizes the target detection algorithm based on deep learning to identify and position the bubbles on the surface of the polyester film, and can improve the efficiency and accuracy of bubble detection, thereby more effectively processing the polyester film with quality problems and improving the quality of shallow screen printing. The target detection algorithm based on the deep learning comprises the following steps:
and (3) data collection: first, it is necessary to collect optical image data of bubbles, including bubble images of different sizes, shapes, and numbers, which should cover various bubble situations as much as possible, and perform preprocessing such as denoising, smoothing, contrast enhancement, etc. before processing, so as to improve image quality.
Training a model: when the image data is used for training a deep learning model to detect bubbles, characteristics such as different forms, sizes and the like of the bubbles are required to be considered, and the marked image can be used as input data, and model parameters are optimized through continuous iterative adjustment, so that the bubbles can be more accurately identified and positioned.
Model optimization: in order to further improve the recognition rate and the robustness of the model, the model can be optimized by means of increasing a data set, adjusting the number of layers of the neural network, parameters and the like, so that a better effect is achieved.
And (3) real-time detection: in the operation process, the film surface image acquired in real time is input into a trained model to detect and position the air bubble, and once the model detects the air bubble, a corresponding signal is immediately given and transmitted to a display platform so as to take corresponding treatment measures.
Example 5:
in the embodiment 5, the improvement is further improved on the basis of the embodiment 1, and the improvement point is that in the step S1, the temperature is raised to the preset temperature to perform the polyesterification reaction in a gradual temperature raising mode, the temperature raising is divided into a plurality of stages, the temperature raising speed is controlled, the temperature amplitude is raised at intervals, the temperature in the reaction kettle is required to be stabilized for a period of time until the heat in the polyester raw material is uniformly distributed and then the temperature is raised in the next stage, so that the reaction and the quality of the product are facilitated, the excessive air bubbles formed due to the excessively rapid temperature rise are avoided until the preset temperature is reached, and the quality of the product is ensured.
Specifically, the temperature in the reaction kettle is firstly increased to 80 ℃ in the first stage, the temperature rising speed is controlled within 5 ℃/min in the process of increasing, the temperature rising is stopped for 10 minutes after the temperature reaches 80 ℃, the temperature in the reaction kettle is stabilized, the heat of the raw materials in the reaction kettle is uniformly distributed, then the reaction kettle is heated to 100 ℃ in the second stage, the temperature in the reaction kettle is likewise increased, the temperature rising speed is controlled within 5 ℃/min in the process of increasing, the temperature in the reaction kettle is stopped for 10 minutes after the temperature reaches 100 ℃, the temperature in the reaction kettle is stabilized, the heat of the raw materials in the reaction kettle is uniformly distributed, the reaction kettle is then subjected to the third stage, the fourth stage and the like, the temperature of each stage which is increased than the temperature of the previous stage is 20 ℃ until the preset temperature of 260 ℃ is reached.
The inventor has found through years of practical experience and multiple experiments that if the temperature in the reaction kettle is directly heated to 260 ℃ at one time, more bubbles are generated in the reaction process, the quality of the product is unstable, the temperature is increased at intervals by dividing the temperature rise into a plurality of stages and controlling the temperature rise speed, the temperature in the reaction kettle needs to be stabilized for a period of time at the end of each temperature rise stage until the heat of the raw materials in the reaction kettle is uniformly distributed and then the temperature rise in the next stage is carried out, and the generated bubbles are less than the bubbles which are directly heated to 260 ℃ at one time, and the quality of the product is more stable.
Meanwhile, an isolation layer is additionally arranged around the reaction kettle and used for reducing air convection near the reaction kettle, so that the loss and fluctuation of the temperature of the reaction kettle caused by the surrounding air convection are prevented, and the quality of a product is more stable.
Example 6:
embodiment 6 is a further improvement on the basis of embodiment 4 in that an electrostatic eliminator is provided in the peripheral area of the optical sensor, for avoiding false alarm sources of bubbles after dust particles and moisture in the air are adsorbed by the static electricity, thereby improving bubble recognition accuracy, and for reducing the influence of static electricity generated during film production on the electronic transmission of the optical sensor, thereby avoiding distortion of measurement data.
The inventor finds that an extremely important problem needs to be solved through years of practical experience and multiple experiments, namely, after finding that static electricity adsorbs dust particles and moisture in air, an online detection system can easily identify the dust particles and moisture as bubbles, so that the problem of false bubble information is generated, after finding that the technical problem, the inventor sets a static eliminator in the peripheral area of an optical sensor, so that the problem can be effectively solved, and through experimental verification, the accuracy of detecting the bubbles by the online detection system is improved after setting the static eliminator. In addition, the arrangement of the static eliminator in the peripheral area of the optical sensor has another advantage of reducing the influence of static generated in the film production process on the electronic transmission of the optical sensor, thereby avoiding the distortion of measured data and solving the interference problem of static on the electronic transmission.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The preparation process of the special polyester film for shallow screen printing is characterized by comprising the following steps of:
(1) Putting ethylene glycol and terephthalic acid into a reaction kettle, adding a catalyst into the reaction kettle, heating to a preset temperature, and carrying out a polyesterification reaction to obtain polyethylene terephthalate;
(2) Uniformly mixing polyethylene glycol terephthalate, nano silicon dioxide, a filler, a stabilizer, an antistatic agent, a tackifier and an antioxidant, and heating to a molten state to obtain a polyester; the weight portions of the components are as follows: 80-100 parts of polyethylene terephthalate, 5-8 parts of nano silicon dioxide, 5-10 parts of filler, 0.05-0.2 part of antioxidant, 0.1-0.5 part of stabilizer, 2-5 parts of antistatic agent and 2-5 parts of tackifier;
(3) Extruding the polyester into a film by an extruder, and carrying out electrostatic adsorption and cooling on the extruded film to obtain a polyester film semi-finished product;
(4) Carrying out biaxial stretching treatment on the obtained semi-finished polyester film to obtain a finished polyester film;
(5) Quality detection, slitting and packaging are carried out on the polyester film finished product obtained after the stretching treatment to obtain a special polyester film for shallow screen printing, and the produced edge film is recycled in the slitting process;
the quality detection of the polyester film finished product obtained after the stretching treatment comprises the following steps: the on-line detection system is used for monitoring the bubble condition on the surface of the film, the on-line detection system comprises a high-precision optical sensor and an image processing module, the optical sensor acquires optical information on the surface of the film in real time and transmits the optical information to the image processing module, the image processing module identifies and positions the bubble based on a target detection algorithm of deep learning, the acquired optical information is analyzed in real time, the bubble on the surface of the film is accurately identified, the bubble information is transmitted to the display platform in real time, the display platform displays the bubble information according to the received bubble information, meanwhile, when the number of detected bubbles exceeds a preset threshold value, the system automatically alarms to remind operators to check and process, and in addition, the display platform records the position and the number of the bubble, so that the position is known to be easier to appear, and a reference is provided for optimizing the production process.
2. The process for preparing a polyester film special for shallow screen printing according to claim 1, wherein in the step (3), the method for obtaining the polyester film semi-finished product by electrostatic adsorption and cooling of the extruded film comprises the following steps:
attaching the membrane to a roller way cooling device by utilizing electrostatic adsorption, and cooling by a roller way at a set temperature and a set speed to reduce the temperature of the membrane and promote the solidification of the membrane to form a polyester film semi-finished product;
the output voltage range of the high-voltage generator adopted by the electrostatic adsorption is 6-12KV, the adopted electrostatic adsorption wires are steel belts, the width of the steel belts is 3-6mm, the thickness of the steel belts is 0.05-0.08mm, and the temperature of the roller way is 25-30 ℃.
3. The process for preparing a polyester film special for shallow screen printing according to claim 1, wherein in the step (4), the method for biaxially stretching the obtained polyester film semi-finished product comprises the following steps:
placing the semi-finished polyester film on stretching equipment for longitudinal stretching and transverse stretching respectively, wherein the transverse stretching rate is 4-5 times and the longitudinal stretching rate is 3-4 times; and (3) detecting the thickness of the biaxially oriented polyester film by using a thickness measuring instrument so as to ensure that the biaxially oriented polyester film meets the thickness standard requirement, and finally, carrying out traction, edge cutting and rolling to obtain a polyester film finished product, wherein in addition, waste materials obtained by film breaking and edge cutting also need to be recycled in the process.
4. The process for preparing the polyester film special for shallow screen printing according to claim 1, wherein the filler is talcum powder or calcium carbonate, the antioxidant is 2, 6-di-tert-butyl-P-cresol or 3-tert-butyl-4-hydroxycinnamaldehyde, the stabilizer is a UV-P light stabilizer, the antistatic agent is a polyether type antistatic agent or an ionic type antistatic agent, and the tackifier is hydroxyethyl methyl cellulose.
5. The process for preparing the polyester film special for shallow screen printing according to claim 3, wherein the thickness measuring instrument is an infrared thickness measuring instrument, and the infrared thickness measuring instrument transmits data of scanning detection thickness to a screen of an industrial personal computer for display, and the displayed data comprise longitudinal and transverse section thickness data and transverse section average thickness trend of the polyester film.
6. The process for preparing a polyester film special for shallow screen printing according to claim 1, wherein an electrostatic eliminator is arranged in the peripheral area of the optical sensor, and is used for avoiding false alarm sources of bubbles after dust particles and moisture in the air are adsorbed by static electricity, thereby improving the bubble recognition accuracy, and reducing the influence of static electricity generated in the film production process on the electronic transmission of the optical sensor, thereby avoiding the distortion of measured data.
7. The process for preparing the special polyester film for shallow screen printing according to claim 1, wherein in the step (1), a gradual heating mode is adopted for the polyester reaction after the temperature is raised to a preset temperature, the temperature is divided into a plurality of stages, the heating speed is controlled, the temperature amplitude is increased at intervals, the temperature in the reaction kettle is required to be stabilized for a period of time when each heating stage is finished, the temperature of raw materials in the reaction kettle is required to be uniformly distributed, and then the next stage heating is carried out until the preset temperature is reached, so that excessive bubbles are prevented from being formed due to the excessively rapid temperature rise, and the product quality is ensured; meanwhile, an isolating layer is additionally arranged around the reaction kettle and used for reducing air convection near the reaction kettle, so that the loss and fluctuation of the temperature of the reaction kettle caused by the surrounding air convection are prevented.
8. A special polyester film for shallow screen printing, which is prepared by the preparation process of the special polyester film for shallow screen printing according to any one of claims 1 to 7.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010167768A (en) * | 2008-12-22 | 2010-08-05 | Toyobo Co Ltd | Biaxially stretched polyethylene terephthala-based resin film and method of manufacturing the same |
| CN102653625A (en) * | 2011-03-03 | 2012-09-05 | 惠志锋 | Porous polyester film and manufacturing method thereof |
| CN103818070A (en) * | 2013-12-13 | 2014-05-28 | 合肥乐凯科技产业有限公司 | White polyester film and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010167768A (en) * | 2008-12-22 | 2010-08-05 | Toyobo Co Ltd | Biaxially stretched polyethylene terephthala-based resin film and method of manufacturing the same |
| CN102653625A (en) * | 2011-03-03 | 2012-09-05 | 惠志锋 | Porous polyester film and manufacturing method thereof |
| CN103818070A (en) * | 2013-12-13 | 2014-05-28 | 合肥乐凯科技产业有限公司 | White polyester film and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李春阳等.双向拉伸聚对苯二甲酸乙二醇酯薄膜的生产工艺及应用.郑州轻工业学院学报(自然科学版).1998,13(02),45-47. * |
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