CN116004143A - Ultraviolet-resistant, dizzy-resistant and bending-resistant OLED (organic light emitting diode) support film and preparation method thereof - Google Patents
Ultraviolet-resistant, dizzy-resistant and bending-resistant OLED (organic light emitting diode) support film and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an ultraviolet-resistant, anti-dizzy and bending-resistant OLED support film and a preparation method thereof, and belongs to the technical field of OLEDs. The ultraviolet-resistant, anti-dizzy and bending-resistant OLED support film comprises a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence. The ultraviolet-resistant, anti-dizzy and bending-resistant OLED can effectively reduce the entry of ultraviolet rays and has good anti-dizzy effect.
Description
Technical Field
The invention belongs to the technical field of OLED (organic light emitting diode), and particularly relates to an ultraviolet-resistant, anti-dizzy and bending-resistant OLED support film and a preparation method thereof.
Background
The OLED display screen is a display screen made of organic light emitting diodes. The self-luminous organic electroluminescent diode has the advantages of no need of a backlight source, high contrast, thin thickness, wide viewing angle, high reaction speed, wide use temperature range, simple structure and manufacturing process and the like, and can be used for flexible panels.
The state always pays attention to the development of OLED screens, beijing east, tianma and the like continuously update production lines, but the protective films used with the screens are always monopoly abroad (Japan, korea, america and the like).
CN110452632a discloses a method for producing a lower support film for an OLED display screen and a product thereof, the support film comprising: the anti-static film comprises a substrate, a pressure-sensitive adhesive layer and a release film, wherein the two sides of the release film are coated with the anti-static layer, the substrate is a PET, PI, PEN, COP, PPS, PC optical film, the light transmittance is more than 91%, the haze is less than 1.5%, one side of the substrate is coated with the anti-static layer, and the other side of the substrate is coated with the pressure-sensitive adhesive layer; the TG value of the pressure-sensitive adhesive layer is between-80 ℃ and-20 ℃, and a release film of the double-sided antistatic layer is compounded on the pressure-sensitive adhesive layer to obtain a base film; and (3) after curing the base film, compounding a double-sided antistatic protective film on the antistatic surface of the base material. CN112680135a discloses a support film for an OLED module and a preparation method thereof, the support film comprises a first substrate layer, an antistatic low-viscosity pressure-sensitive adhesive layer, a second substrate layer, a high-viscosity pressure-sensitive adhesive layer and an antistatic release film layer, the antistatic low-viscosity pressure-sensitive adhesive layer and the high-viscosity pressure-sensitive adhesive layer are respectively arranged on two sides of the second substrate layer, the first substrate layer is positioned on one side of the antistatic low-viscosity pressure-sensitive adhesive layer opposite to the second substrate layer, the first substrate layer and the antistatic low-viscosity pressure-sensitive adhesive layer are combined to form a protective film, the antistatic release film layer is arranged on one side of the high-viscosity pressure-sensitive adhesive layer opposite to the second substrate layer, and the high-viscosity pressure-sensitive adhesive layer and the second substrate layer are combined to form a support film entity.
Disclosure of Invention
In order to realize autonomous localization of the OLED support film product, break monopoly and make the cost performance of the product higher, and in order to further improve the performance of the product, such as low transmittance, high haze, yellowing of adhesive color, ultraviolet resistance, dizziness and the like, and increase the bending resistance of the product, a series of researches are carried out by researchers of the invention.
The first aspect of the invention discloses an ultraviolet-resistant, anti-dizzy and bending-resistant OLED support film, which comprises a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence.
In some embodiments of the invention, the transparent protective film layer has a thickness of 25-125 μm.
In some embodiments of the invention, the base film layer has a thickness of 12.5-125 μm and a visible light transmission of > 90%.
In some embodiments of the invention, the treated layer has a thickness of 5-15 μm and a hardness of > 2h.
In some embodiments of the invention, the ultraviolet resistant and antiglare layer has a thickness of 5 to 10 μm.
In some embodiments of the invention, the adhesive layer has a thickness of 5-50 μm;
in some embodiments of the invention, the blue protective film has a thickness of 25-125 μm.
In some embodiments of the present invention, the material of the base film layer is at least one of PET, liquid transparent PI, CPI, PEN, and PA.
In some embodiments of the present invention, the processing layer comprises the following components in parts by weight:
20-30 parts of zirconia, 10-20 parts of methyl-2-pentanone, 10-20 parts of aliphatic solvent, 10-20 parts of 1-methoxy-2-propanol, 10-20 parts of cyclohexanone, 10-30 parts of photosensitive resin and 0.5-1 part of pentaerythritol triacrylate.
In some embodiments of the present invention, the raw materials for preparing the ultraviolet-resistant and anti-glare layer include the following components in parts by weight:
50-60 parts of high-density polyethylene, 10-20 parts of ethylene terephthalate, 5-10 parts of glycidyl methacrylate and 0.1-0.2 part of ultraviolet absorber.
In some embodiments of the invention, the ultraviolet light absorber is a salicylate or benzophenone.
In some embodiments of the present invention, the adhesive layer is prepared from the following components in parts by weight:
40-60 parts of rubber, 0.5-1 part of ion scavenger, 0.5-1 part of antioxidant, 0.5-1 part of accelerator and 40-60 parts of bisphenol resin.
The second aspect of the invention discloses a preparation method of the ultraviolet-resistant, anti-dizzy and bending-resistant OLED support film according to the first aspect, which comprises the following steps:
s01, preparing a base film;
s02, after mixing the preparation raw materials of the treatment layer, dispersing the mixture on the base film to form the treatment layer;
s03, covering a film made of raw materials of the ultraviolet-resistant and anti-dazzle layers on the treatment layer;
s04, after mixing the preparation raw materials of the adhesive layer, coating the adhesive layer on the ultraviolet-resistant and anti-glare layer;
s05, drying;
s05, covering the transparent protective film layer and the blue protective film.
In some embodiments of the present invention, in S05, the drying tunnel used for drying includes: the two ventilating channels are respectively arranged above and below the drying channel; the air outlet components are arranged on the ventilating duct, and the air outlet components above and the air outlet components below are distributed in a staggered manner.
In some embodiments of the invention, the air outlet assembly comprises: the air conditioner comprises a split cavity, wherein first air outlet cavities are symmetrically arranged on two sides of the split cavity, second air outlet cavities are arranged on the inner side of the first air outlet cavities, a first air exhaust cavity is arranged between the two second air outlet cavities, and a second air exhaust cavity communicated with the first air exhaust cavity is arranged inside the split cavity;
the side wall of the diversion chamber is provided with a diversion hole communicated with the first air outlet chamber and the second air outlet chamber; the air outlet surfaces of the first air outlet chamber and the second air outlet chamber are obliquely arranged, the air outlet surface of the first air outlet chamber is higher than the air outlet surface of the second air outlet chamber, and a plurality of air outlet holes are formed in the air outlet surface; the air exhaust surface of the first air exhaust chamber is horizontally arranged, and a plurality of air exhaust holes are formed in the air exhaust surface;
the ventilation duct includes: an air inlet duct communicated with the split-flow chamber and an exhaust duct communicated with the second exhaust chamber.
In some embodiments of the present invention, the distance D between the air exhaust surface of the air exhaust assembly and the horizontal center line of the drying tunnel is set to satisfy the following requirements:
the inclination angles of the two air outlet surfaces are the same, the included angle between the axis of the air outlet hole and the horizontal plane is alpha, and the distance from the air outlet hole closest to the air outlet surface to the vertical center line of the air outlet assembly is d, so as to obtain
D＝d*tanα+μ
Where μ is the calculated compensation value.
In some embodiments of the present invention, the two outer side walls of the second exhaust chamber, which are in contact with the diversion chamber, are further provided with heating assemblies connected with the control end of the drying tunnel; the temperature sensor is used for detecting the temperature in the split-flow chamber, if the temperature in the split-flow chamber does not reach a preset value, the corresponding heating component is controlled to be started by the control end, and the temperature in the split-flow chamber is compensated to ensure that the temperature of the air outlet reaches the preset value.
The beneficial technical effects of the invention are as follows:
the ultraviolet-resistant, anti-dizzy and bending-resistant OLED can effectively reduce the entry of ultraviolet rays and has good anti-dizzy effect.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of a method for preparing an OLED support film with ultraviolet resistance, dizzy resistance and bending resistance according to the invention;
FIG. 2 is a schematic diagram of a drying tunnel used for drying in the preparation method of the OLED support film with ultraviolet resistance, dizzy resistance and bending resistance;
FIG. 3 is a schematic cross-sectional structure of an air-out assembly in the method for preparing an OLED support film with ultraviolet resistance, dizzy resistance and bending resistance according to the invention;
fig. 4 is a schematic diagram of an air outlet area of an air outlet assembly in the preparation method of the ultraviolet-resistant, anti-dizzy and bending-resistant OLED support film.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
The experimental methods used in the following examples are conventional methods unless otherwise specified. Materials, reagents and the like used in the examples described below are commercially available unless otherwise specified. The examples and comparative examples employ the same treatment methods and procedures, unless otherwise specified. The said
In the following examples and comparative examples, the transparent protective film layer was a release PET, 50 μm thick. The blue protective film is release PET (Jin Hengcheng) and has a thickness of 50 μm. The base film layer is optical grade PET, the thickness is 50 mu m, and the visible light transmittance is more than 90%. After the raw materials of the ultraviolet-resistant and anti-glare layers are mixed, extruding by a screw, granulating, and blow-molding to form a film; the thickness of the ultraviolet-resistant and anti-dazzle layer is 8 mu m. The aliphatic solvent is methyl ether; the photosensitive resin is CMC2200; the thickness of the treatment layer is 10 mu m, and the hardness is more than 2 hours. The rubber is 1072cg; the ion trapping agent is IXE-100; the antioxidant is G200; the promoter is Everrnox-10; the bisphenol resin is south asia E-12 (604); the thickness of the adhesive layer was 25 μm.
Example 1
An ultraviolet-resistant, dizzy-resistant and bending-resistant OLED support film comprises a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence.
The preparation method comprises the following steps:
s01, preparing a base film;
s02, mixing the preparation raw materials of the treatment layer, and coating the mixture on the base film to form the treatment layer;
s03, covering a film made of raw materials of the ultraviolet-resistant and anti-dazzle layer on the treatment layer to form the ultraviolet-resistant and anti-dazzle layer;
s04, after mixing the preparation raw materials of the adhesive layer, coating the adhesive layer on the ultraviolet-resistant and anti-dazzle layer;
s05, drying;
s06, covering the transparent protective film layer and the blue protective film.
The preparation raw materials of the treatment layer comprise the following components in parts by weight:
25 parts of zirconium oxide, 15 parts of methyl-2-pentanone, 15 parts of aliphatic solvent, 15 parts of 1-methoxy-2-propanol, 15 parts of cyclohexanone, 20 parts of photosensitive resin and 0.8 part of pentaerythritol triacrylate.
Wherein, the preparation raw materials of the ultraviolet resistance and anti-dazzle layer comprise the following components in parts by weight:
55 parts of high-density polyethylene, 15 parts of ethylene terephthalate, 8 parts of glycidyl methacrylate and 0.15 part of ultraviolet absorber; the ultraviolet absorbent is phenyl p-isopropyl salicylate.
The adhesive layer is prepared from the following components in parts by weight:
50 parts of rubber, 0.8 part of ion trapping agent, 0.8 part of antioxidant, 0.8 part of accelerator and 50 parts of bisphenol resin.
Example 2
An ultraviolet-resistant, dizzy-resistant and bending-resistant OLED support film comprises a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence.
The preparation method comprises the following steps:
s01, preparing a base film;
s02, mixing the preparation raw materials of the treatment layer, and coating the mixture on the base film to form the treatment layer;
s03, covering a film made of raw materials of the ultraviolet-resistant and anti-dazzle layer on the treatment layer to form the ultraviolet-resistant and anti-dazzle layer;
s04, after mixing the preparation raw materials of the adhesive layer, coating the adhesive layer on the ultraviolet-resistant and anti-dazzle layer;
s05, drying;
s06, covering the transparent protective film layer and the blue protective film.
The preparation raw materials of the treatment layer comprise the following components in parts by weight:
25 parts of zirconium oxide, 15 parts of methyl-2-pentanone, 15 parts of aliphatic solvent, 15 parts of 1-methoxy-2-propanol, 15 parts of cyclohexanone, 20 parts of photosensitive resin and 0.8 part of pentaerythritol triacrylate.
Wherein, the preparation raw materials of the ultraviolet resistance and anti-dazzle layer comprise the following components in parts by weight:
50 parts of high-density polyethylene, 19 parts of ethylene terephthalate, 9 parts of glycidyl methacrylate and 0.15 part of ultraviolet absorber; the ultraviolet absorbent is phenyl p-isopropyl salicylate.
The adhesive layer is prepared from the following components in parts by weight:
50 parts of rubber, 0.8 part of ion trapping agent, 0.8 part of antioxidant, 0.8 part of accelerator and 50 parts of bisphenol resin.
Example 3
An ultraviolet-resistant, dizzy-resistant and bending-resistant OLED support film comprises a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence.
The preparation method comprises the following steps:
s01, preparing a base film;
s02, mixing the preparation raw materials of the treatment layer, and coating the mixture on the base film to form the treatment layer;
s03, covering a film made of raw materials of the ultraviolet-resistant and anti-dazzle layer on the treatment layer to form the ultraviolet-resistant and anti-dazzle layer;
s04, after mixing the preparation raw materials of the adhesive layer, coating the adhesive layer on the ultraviolet-resistant and anti-dazzle layer;
s05, drying;
s06, covering the transparent protective film layer and the blue protective film.
The preparation raw materials of the treatment layer comprise the following components in parts by weight:
25 parts of zirconium oxide, 15 parts of methyl-2-pentanone, 15 parts of aliphatic solvent, 15 parts of 1-methoxy-2-propanol, 15 parts of cyclohexanone, 20 parts of photosensitive resin and 0.8 part of pentaerythritol triacrylate.
Wherein, the preparation raw materials of the ultraviolet resistance and anti-dazzle layer comprise the following components in parts by weight:
60 parts of high-density polyethylene, 19 parts of ethylene terephthalate, 9 parts of glycidyl methacrylate and 0.15 part of ultraviolet absorber; the ultraviolet absorbent is phenyl p-isopropyl salicylate.
The adhesive layer is prepared from the following components in parts by weight:
50 parts of rubber, 0.8 part of ion trapping agent, 0.8 part of antioxidant, 0.8 part of accelerator and 50 parts of bisphenol resin.
Example 4
An ultraviolet-resistant, dizzy-resistant and bending-resistant OLED support film comprises a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence.
The preparation method comprises the following steps:
s01, preparing a base film;
s02, mixing the preparation raw materials of the treatment layer, and coating the mixture on the base film to form the treatment layer;
s03, covering a film made of raw materials of the ultraviolet-resistant and anti-dazzle layer on the treatment layer to form the ultraviolet-resistant and anti-dazzle layer;
s04, after mixing the preparation raw materials of the adhesive layer, coating the adhesive layer on the ultraviolet-resistant and anti-dazzle layer;
s05, drying;
s06, covering the transparent protective film layer and the blue protective film.
The preparation raw materials of the treatment layer comprise the following components in parts by weight:
25 parts of zirconium oxide, 15 parts of methyl-2-pentanone, 15 parts of aliphatic solvent, 15 parts of 1-methoxy-2-propanol, 15 parts of cyclohexanone, 20 parts of photosensitive resin and 0.8 part of pentaerythritol triacrylate.
Wherein, the preparation raw materials of the ultraviolet resistance and anti-dazzle layer comprise the following components in parts by weight:
55 parts of high-density polyethylene, 15 parts of ethylene terephthalate, 8 parts of glycidyl methacrylate and 0.20 part of ultraviolet absorber; the ultraviolet absorbent is phenyl p-isopropyl salicylate.
The adhesive layer is prepared from the following components in parts by weight:
50 parts of rubber, 0.8 part of ion trapping agent, 0.8 part of antioxidant, 0.8 part of accelerator and 50 parts of bisphenol resin.
Example 5
An ultraviolet-resistant, dizzy-resistant and bending-resistant OLED support film comprises a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence.
The preparation method comprises the following steps:
s01, preparing a base film;
s02, mixing the preparation raw materials of the treatment layer, and coating the mixture on the base film to form the treatment layer;
s03, covering a film made of raw materials of the ultraviolet-resistant and anti-dazzle layer on the treatment layer to form the ultraviolet-resistant and anti-dazzle layer;
s04, after mixing the preparation raw materials of the adhesive layer, coating the adhesive layer on the ultraviolet-resistant and anti-dazzle layer;
s05, drying;
s06, covering the transparent protective film layer and the blue protective film.
The preparation raw materials of the treatment layer comprise the following components in parts by weight:
25 parts of zirconium oxide, 15 parts of methyl-2-pentanone, 15 parts of aliphatic solvent, 15 parts of 1-methoxy-2-propanol, 15 parts of cyclohexanone, 20 parts of photosensitive resin and 0.8 part of pentaerythritol triacrylate.
Wherein, the preparation raw materials of the ultraviolet resistance and anti-dazzle layer comprise the following components in parts by weight:
55 parts of high-density polyethylene, 15 parts of ethylene terephthalate, 8 parts of glycidyl methacrylate and 0.30 part of ultraviolet absorber; the ultraviolet absorbent is phenyl p-isopropyl salicylate.
The adhesive layer is prepared from the following components in parts by weight:
50 parts of rubber, 0.8 part of ion trapping agent, 0.8 part of antioxidant, 0.8 part of accelerator and 50 parts of bisphenol resin.
Example 6
An ultraviolet-resistant, dizzy-resistant and bending-resistant OLED support film comprises a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence.
The preparation method comprises the following steps:
s01, preparing a base film;
s02, mixing the preparation raw materials of the treatment layer, and coating the mixture on the base film to form the treatment layer;
s03, covering a film made of raw materials of the ultraviolet-resistant and anti-dazzle layer on the treatment layer to form the ultraviolet-resistant and anti-dazzle layer;
s04, after mixing the preparation raw materials of the adhesive layer, coating the adhesive layer on the ultraviolet-resistant and anti-dazzle layer;
s05, drying;
s06, covering the transparent protective film layer and the blue protective film.
The preparation raw materials of the treatment layer comprise the following components in parts by weight:
25 parts of zirconium oxide, 15 parts of methyl-2-pentanone, 15 parts of aliphatic solvent, 15 parts of 1-methoxy-2-propanol, 15 parts of cyclohexanone, 20 parts of photosensitive resin and 0.8 part of pentaerythritol triacrylate.
Wherein, the preparation raw materials of the ultraviolet resistance and anti-dazzle layer comprise the following components in parts by weight:
55 parts of high-density polyethylene, 15 parts of ethylene terephthalate, 8 parts of glycidyl methacrylate and 0.20 part of ultraviolet absorber; the ultraviolet absorbent is 2'- (2' -hydroxy-3 '-tertiary butyl-5' -methylphenyl) -5-chlorobenzotriazole.
The adhesive layer is prepared from the following components in parts by weight:
50 parts of rubber, 0.8 part of ion trapping agent, 0.8 part of antioxidant, 0.8 part of accelerator and 50 parts of bisphenol resin.
Comparative example 1
The difference from example 1 is that the raw materials for preparing the ultraviolet-resistant and anti-dazzle layer comprise the following components in parts by weight:
55.15 parts of high-density polyethylene, 15 parts of ethylene terephthalate and 8 parts of glycidyl methacrylate.
Example 7
The difference from example 1 is that the drying tunnel 1 used for drying the uv-resistant anti-glare bending-resistant OLED support film during the preparation process comprises: two ventilation channels 2 which are respectively arranged above and below the drying channel 1; the air outlet assemblies 3 are arranged on the ventilating duct 2, and the air outlet assemblies 3 positioned above and the air outlet assemblies 3 positioned below are distributed in a staggered manner;
the air outlet assembly 3 comprises: the air distribution device comprises a distribution chamber 310, wherein first air outlet chambers 320 are symmetrically arranged on two sides of the distribution chamber 310, a second air outlet chamber 330 is arranged on the inner side of the first air outlet chamber 320, a first air exhaust chamber 340 is arranged between the two second air outlet chambers 330, and a second air exhaust chamber 350 communicated with the first air exhaust chamber 340 is arranged inside the distribution chamber 310;
the side wall of the diversion chamber 310 is provided with a diversion hole 311 communicated with the first air outlet chamber 320 and the second air outlet chamber 330; the air outlet surfaces 360 of the first air outlet chamber 320 and the second air outlet chamber 330 are both inclined, the air outlet surface 360 of the first air outlet chamber 320 is higher than the air outlet surface 360 of the second air outlet chamber 330, and a plurality of air outlet holes 361 are formed in the air outlet surface 360; the air exhaust surface 370 of the first air exhaust chamber 340 is horizontally arranged, and a plurality of air exhaust holes 371 are arranged on the air exhaust surface 370;
the ventilation duct 2 includes: an air inlet duct in communication with the diverting chamber 310 and an air outlet duct in communication with the second air outlet chamber 350.
The drying tunnel 1 is used for drying the ultraviolet-resistant and anti-dazzle layers coated with the adhesive layers, six sections of drying tunnels 1 are sequentially passed through in the drying process, the temperature in each section of drying tunnel 1 is sequentially set to 60 ℃, 80 ℃, 160 ℃, 60 ℃ according to the sequence of the main body to be dried, and the air inlet and outlet frequencies corresponding to each section of drying tunnel 1 are respectively set as air inlet: 25HZ, 20HZ, 25HZ, and the exhaust wind frequency is set to 40HZ;
therefore, the control end is used for controlling the temperature of the air outlet in each section of drying tunnel 1 so as to maintain the temperature in the drying tunnel 1 to reach the set temperature;
further, in order to ensure uniformity and efficiency of drying, air outlet assemblies 3 are arranged above and below the drying tunnel 1, and the air outlet assemblies 3 above and below are staggered; the length of the air outlet assembly 3 corresponds to the width of an ultraviolet-resistant and anti-dazzle layer (hereinafter, simply referred to as a main body to be dried) coated with the adhesive layer, and in order to ensure that hot air from the air outlet assembly 3 can be uniformly blown to the ultraviolet-resistant and anti-dazzle layer coated with the adhesive layer, the hot air firstly enters the flow distribution chamber 310 from the air inlet duct to be distributed, and then the hot air is uniformly discharged from the air outlet surfaces of the two first air outlet chambers 320 and the two second air outlet chambers 330 respectively; the first air outlet chamber 320 and the second air outlet chamber 330 are similar in shape, each of which comprises a straight section, an arc-shaped buffer section and an air outlet section, wherein the straight section is arranged close to the flow dividing holes 311, hot air from the flow dividing holes 311 passes through the straight section and then is transited to the air outlet section from the arc-shaped buffer section, and the width of the air outlet section is smaller than that of the arc-shaped buffer section, so that the air outlet section is contracted to enable the hot air to uniformly flow out of the air outlet holes 361 and uniformly blow onto a main body to be dried;
the air outlet surfaces 360 are obliquely arranged towards the inner side of the air outlet assembly 3, so that an air outlet area formed by the air outlet surfaces 360 is in a closed shape, all the air outlet surfaces 360 are in a concave shape, heat damage caused by hot air diffusion is prevented, drying temperature blown to a main body to be dried is further ensured, and drying efficiency is improved; the plurality of air outlet holes 361 which are uniformly arranged promote the uniformity of air outlet, ensure the uniformity of drying and promote the drying effect of the adhesive layer;
after the hot air is blown to the main body to be dried from the air outlet 361, the hot air enters the first air exhaust chamber 340 from the air exhaust hole 371 of the air exhaust surface 370 and then enters the air exhaust channel for air exhaust through the second air exhaust chamber 350, and due to the provided air exhaust power, a certain negative pressure is formed at the air exhaust surface 370, so that the hot air coming out of the air outlet 361 has good gathering property, and can be directly blown to the main body to be dried, so that heat dissipation is prevented, and the drying efficiency and the drying uniformity are further improved.
Example 8
On the basis of embodiment 7, the distance D between the air exhaust surface 370 of the air outlet assembly 3 and the horizontal center line of the drying tunnel 1 should be set to satisfy the following requirements:
if the inclination angles of the two air-out surfaces 360 are the same, the included angle between the axis of the air-out hole 361 and the horizontal plane is α, and if the distance d from the air-out hole 361 closest to the air-out surface 370 to the vertical center line of the air-out assembly 3 is known, the following is obtained
D＝d*tanα+μ
And μ is a calculated compensation value, and is used for compensating the vertical distance between the air outlet 361 closest to the air exhaust surface 370 and the air exhaust surface 370, and the thickness of the main body to be dried (the thickness is negligible when being smaller than 1 mm), so that the area of the main body to be dried can be covered by the air outlet areas formed by all the air outlet 361, and each position of the main body to be dried passing through the air outlet component 3 can be contacted with hot air, thereby achieving the purpose of uniform drying.
Because the air-out face 360 is inclined, therefore, in the width direction of the air-out assembly 3, all the air-out faces 360 form the concave shape with the middle low and high ends, and because the air-out face 370 is arranged at the middle position of the concave shape, if the distance between the air-out assembly 3 and the main body to be dried is relatively close, the contact area between the hot air and the main body to be dried can be reduced, if the distance between the air-out assembly 3 and the main body to be dried is relatively far, the hot air loss is relatively serious, and the drying effect can be affected, so that the distance between the air-out assembly 3 and the main body to be dried is set to meet the requirements, the aim is to ensure that the most effective utilization of hot air energy is achieved, meanwhile, the direct contact area between the hot air out of the air-out assembly 3 and the main body to be dried is ensured, the uniformity and consistency of the drying process are ensured, and the drying effect is improved.
Example 9
On the basis of embodiment 7 or embodiment 8, the two outer sidewalls of the second exhaust chamber 350, which are in contact with the split-flow chamber 310, are further provided with heating assemblies connected with the control end of the drying tunnel 1; a temperature sensor connected to the control end is disposed in the split-flow chamber 310, and the temperature sensor is configured to detect the temperature in the split-flow chamber 310, and if the temperature in the split-flow chamber 310 does not reach a preset value, the control end controls the corresponding heating assembly to be turned on, so as to perform temperature compensation on the temperature in the split-flow chamber 310, thereby ensuring that the temperature of the air outlet reaches the preset value.
In this embodiment, in order to ensure that the hot air coming out of the air outlet component 3 can reach the set temperature, a heating component is provided for temperature compensation, and a temperature sensor is provided for detecting the temperature in the split-flow chamber 310, because there is heat loss from the hot air entering the air inlet duct to the split-flow chamber 310, if the heat loss is large, the temperature in the split-flow chamber 310 is lower than the preset value, at this time, the heating component needs to be controlled to be turned on, the air flow in the split-flow chamber 310 is assisted to heat, the temperature is ensured to reach the preset value, the stability of the air outlet temperature is further ensured, and the drying effect is further improved;
in addition, the hot air exhausted from the second exhaust chamber 350 is kept at a certain temperature, the exhausted hot air can be circularly heated again and then enter the air outlet assembly 3 through the air inlet duct for recycling, energy sources required by heating are saved, the second exhaust chamber 350 is arranged in the split-flow chamber 310, when the heating assembly works, the exhausted hot air in the second exhaust chamber 350 can be heated at the same time, and when the exhausted hot air is circularly utilized, the energy sources required by the circular heating can be further reduced, which is equivalent to preheating the exhausted hot air, and the environment is more protected.
The control end can also detect the consistency of the air outlet temperatures of the air outlet assemblies 3 in the drying tunnel 1 through the temperature sensor, and is used for evaluating the consistency of the drying temperatures of the drying tunnel 1, and the control end adopts the following formula for detection:
y is an evaluation coefficient, N is the number of temperature sensors, i=1, 2, …, N, T i The temperature value detected by the ith temperature sensor;
setting an evaluation standard value of an evaluation coefficient as epsilon, if Y < epsilon, the consistency of the drying temperature is good, and if Y is more than or equal to epsilon, the consistency of the drying temperature is poor;
the smaller the value of the evaluation coefficient Y is, the better the drying consistency of the drying tunnel 1 is, the better the consistency of the air outlet temperature of each air outlet component 3 is, if the detection result is worse, the temperature detected by each temperature sensor can be inquired, if the deviation of a certain detection temperature is larger, the air outlet temperature of the corresponding air outlet component 3 is lower, at the moment, the heating component can be started to perform temperature compensation, so that the consistency of the drying temperature in the drying tunnel 1 is ensured, the drying effect on the adhesive layer is further improved, and the quality of the finished support film is improved.
Experimental example
The OLED support films of examples and comparative examples were taken for mechanical properties and UV resistance testing.
Tensile strength and elongation at break were tested at 80℃according to the method of GB/T1040-2006 determination of tensile Properties of plastics. The ultraviolet shielding property is expressed by the average transmittance of light rays of 280 to 315nm (UV-B) wavelength.
The properties are expressed as relative percentages of 100% based on the properties of comparative example 1, and the results are shown in Table 1.
Table 1 performance test
| Tensile Strength% | Elongation at break% | Ultraviolet transmittance% | |
| Example 1 | 121 | 119 | 69 |
| Example 2 | 112 | 114 | 71 |
| Example 3 | 134 | 125 | 73 |
| Example 4 | 123 | 120 | 48 |
| Example 5 | 118 | 109 | 33 |
| Example 6 | 119 | 123 | 52 |
| Comparative example 1 | 100 | 100 | 100 |
The results show that the ultraviolet transmittance of examples 1-6 is significantly lower than that of comparative example 1, wherein examples 1-3 are comparable, examples 4 and 5 are significantly lower than examples 1-3, and example 6 is significantly higher than example 4. The influence of the components and the content of the raw materials for preparing the ultraviolet-resistant and anti-dazzle layers on the ultraviolet shielding performance of the obtained OLED support film is shown.
The results show that examples 1-6 have significantly higher tensile strength and elongation at break than comparative example 1, with example 2 being significantly lower than example 1, example 3 being significantly higher than example 1, examples 4 and 6 being comparable to example 1, and example 5 being significantly lower than example 4. The influence of the contents of high-density polyethylene, ethylene terephthalate, glycidyl methacrylate and ultraviolet absorbent on the mechanical properties in the preparation raw materials of the ultraviolet-resistant and anti-dazzle layers is shown.
While the preferred embodiments and examples of the present invention have been described in detail, the present invention is not limited to the above-described embodiments and examples, and various changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (10)
1. The OLED support film is characterized by comprising a transparent protective film layer, a base film layer, a treatment layer, an ultraviolet-resistant and anti-dazzle layer, an adhesive layer and a blue protective film in sequence.
2. The anti-ultraviolet anti-dizzy bending-resistant OLED support film according to claim 1, wherein the thickness of the transparent protective film layer is 25-125 μm;
the thickness of the base film layer is 12.5-125 mu m, and the visible light transmittance is more than 90%;
the thickness of the treatment layer is 5-15 mu m, and the hardness is more than 2 hours;
the thickness of the ultraviolet-resistant and anti-dazzle layer is 5-10 mu m;
the thickness of the adhesive layer is 5-50 mu m;
the thickness of the blue protective film is 25-125 mu m.
3. The anti-ultraviolet, anti-dizzy and bending-resistant OLED support film according to claim 1 or 2, wherein the base film layer is made of at least one of PET, liquid transparent PI, CPI, PEN and PA.
4. An anti-ultraviolet anti-dizzy bending-resistant OLED support film according to any one of claims 1-3, wherein the preparation raw materials of the treatment layer comprise the following components in parts by weight:
20-30 parts of zirconia, 10-20 parts of methyl-2-pentanone, 10-20 parts of aliphatic solvent, 10-20 parts of 1-methoxy-2-propanol, 10-20 parts of cyclohexanone, 10-30 parts of photosensitive resin and 0.5-1 part of pentaerythritol triacrylate.
5. The anti-ultraviolet, anti-dizzy and bending-resistant OLED support film according to any one of claims 1 to 4, wherein the raw materials for preparing the anti-ultraviolet and anti-dazzle layer comprise the following components in parts by weight:
50-60 parts of high-density polyethylene, 10-20 parts of ethylene terephthalate, 5-10 parts of glycidyl methacrylate and 0.1-0.2 part of ultraviolet absorber.
6. The anti-uv, anti-glare and bending-resistant OLED support film according to any one of claims 1-5, wherein the uv absorber is a salicylate or benzophenone.
7. The ultraviolet light resistant, dizziness resistant and bending resistant OLED support film according to any one of claims 1-6, wherein the adhesive layer is prepared from the following components in parts by weight:
40-60 parts of rubber, 0.5-1 part of ion scavenger, 0.5-1 part of antioxidant, 0.5-1 part of accelerator and 40-60 parts of bisphenol resin.
8. A method for preparing an anti-ultraviolet anti-dizzy bending-resistant OLED support film according to any one of claims 1-6, comprising the following steps:
s01, preparing a base film;
s02, mixing the preparation raw materials of the treatment layer, and coating the mixture on the base film to form the treatment layer;
s03, covering a film made of raw materials of the ultraviolet-resistant and anti-dazzle layer on the treatment layer to form the ultraviolet-resistant and anti-dazzle layer;
s04, after mixing the preparation raw materials of the adhesive layer, coating the adhesive layer on the ultraviolet-resistant and anti-dazzle layer;
s05, drying;
s05, covering the transparent protective film layer and the blue protective film.
9. The method for preparing the anti-ultraviolet anti-dizzy bending-resistant OLED support film according to claim 8, wherein in the step S05, a drying tunnel (1) used for drying comprises: two ventilation channels (2) which are respectively arranged above and below the drying channel (1); the air outlet components (3) are arranged on the ventilating duct (2), and the air outlet components (3) positioned above and the air outlet components (3) positioned below are distributed in a staggered manner.
10. The method for preparing the anti-ultraviolet anti-dizzy bending-resistant OLED support film according to claim 8 or 9, wherein the air outlet assembly (3) comprises: the air distribution device comprises a distribution chamber (310), wherein first air outlet chambers (320) are symmetrically arranged on two sides of the distribution chamber (310), second air outlet chambers (330) are arranged on the inner sides of the first air outlet chambers (320), a first air exhaust chamber (340) is arranged between the two second air outlet chambers (330), and a second air exhaust chamber (350) communicated with the first air exhaust chamber (340) is arranged inside the distribution chamber (310);
a diversion hole (311) communicated with the first air outlet chamber (320) and the second air outlet chamber (330) is formed in the side wall of the diversion chamber (310); the air outlet surfaces (360) of the first air outlet chamber (320) and the second air outlet chamber (330) are obliquely arranged, the air outlet surface (360) of the first air outlet chamber (320) is higher than the air outlet surface (360) of the second air outlet chamber (330), and a plurality of air outlet holes (361) are formed in the air outlet surface (360); the exhaust surface (370) of the first exhaust chamber (340) is arranged horizontally, and a plurality of exhaust holes (371) are arranged on the exhaust surface (370).
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| CN217373872U (en) * | 2021-12-24 | 2022-09-06 | 张家港保税区方源翔泰环保科技有限公司 | Energy-conserving printing oven device based on green printing technique |
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| CN111826103A (en) * | 2019-11-06 | 2020-10-27 | 深圳科诺桥科技股份有限公司 | Transparent cover film and preparation method thereof, flexible circuit board and LED transparent screen |
| CN217373872U (en) * | 2021-12-24 | 2022-09-06 | 张家港保税区方源翔泰环保科技有限公司 | Energy-conserving printing oven device based on green printing technique |
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