CN111907176B - Stripping material and preparation device thereof - Google Patents

Stripping material and preparation device thereof Download PDF

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Publication number
CN111907176B
CN111907176B CN202010749363.0A CN202010749363A CN111907176B CN 111907176 B CN111907176 B CN 111907176B CN 202010749363 A CN202010749363 A CN 202010749363A CN 111907176 B CN111907176 B CN 111907176B
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wheel
film
laminating
angle
polyethylene
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CN111907176A (en
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王智弘
郑筱薇
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Hengmei Optoelectronics Co ltd
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Hengmei Optoelectronics Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The invention relates to a stripping material and a preparation device thereof, wherein the preparation device comprises a first laminating wheel for controlling the feeding amount of a polyethylene terephthalate film, and the polyethylene terephthalate film is a base material of the stripping material; a second laminating wheel for controlling the feeding amount of the polyethylene film, wherein the polyethylene film is a stripping layer of a stripping material; the wheel surface of the first attaching wheel is attached to the wheel surface of the second attaching wheel or arranged in a gap mode, and the polyethylene terephthalate film and the polyethylene film enter from the space between the first attaching wheel and the second attaching wheel and are bonded after being pressed by the first attaching wheel and the second attaching wheel; the polyethylene terephthalate film and the polyethylene film are attached and then led out by an angle wheel for adjusting the coating angle; the device provided by the invention can effectively prevent the tilt angle of the attached membrane.

Description

Stripping material and preparation device thereof
Technical Field
The invention relates to a film, in particular to a stripping material and a preparation device thereof.
Background
In the production process of the traditional PSA coating process of the hydrophobic material polarizing plate, the semi-finished polarizing plate 7+ PE film or the protective film 8 (PET + PSA + release film) can be directly used for coating production, the semi-finished polarizing plate 7+ PE film is directly used, because the cost is high, the protective film 8 ((PET + PSA) 9+ release film 10) is used for replacing the semi-finished polarizing plate + PE film for coating production, the protective film has an adhesive layer, if the protective film is used, the adhesive surface of the protective film PSA is adhered to the roller, equipment needs to be replaced, the roller is replaced by the non-adhesive roller for production and use, and the production cost of the protective film (PET + PSA + release film) is still high.
Disclosure of Invention
The invention provides a substitute material for saving the production loss of the polarizing plate, aiming at solving the problem of high cost caused by directly using a polarizing plate semi-finished product plus a PE film or a protective film (PET plus PSA plus a release film) for coating production in the traditional PSA coating process production process of the existing hydrophobic material polarizing plate.
The technical scheme adopted by the invention is as follows: the utility model provides a peel off material, includes polyethylene layer and polyethylene terephthalate layer, the polyethylene layer is the polyethylene diaphragm, polyethylene terephthalate is polyethylene terephthalate diaphragm, polyethylene diaphragm and the laminating of polyethylene terephthalate diaphragm are connected.
Further, the polyethylene terephthalate film is a base material of a release material, and the polyethylene film is a release layer of the release material; the thickness of the base material is 30-50 μm, and the thickness of the stripping layer is 25-40 μm.
The invention also provides a preparation device of the stripping material, which comprises a first laminating wheel for controlling the feeding amount of the polyethylene terephthalate film;
a second laminating wheel for controlling the feeding amount of the polyethylene film;
the wheel surface of the first attaching wheel is attached to the wheel surface of the second attaching wheel or arranged in a gap mode, and the polyethylene terephthalate film and the polyethylene film enter from the space between the first attaching wheel and the second attaching wheel and are bonded after being pressed by the first attaching wheel and the second attaching wheel;
the polyethylene terephthalate film and the polyethylene film are attached and then led out through an angle wheel for adjusting the coating angle;
the second laminating wheel is driven through a third wheel, the third wheel is a driving wheel, and the second laminating wheel is a driven wheel.
Furthermore, first laminating wheel and third wheel drive through first servo motor and second servo motor respectively, first servo motor and second servo motor all connect the switch board, the switch board electrical signal control first servo motor and second servo motor's rotational speed.
Further, the angle between the polyethylene film entering the second laminating wheel and the angle between the polyethylene film exiting the second laminating wheel after being pressed together are acute angles, and the angle between the polyethylene terephthalate film entering the first laminating wheel and the angle between the polyethylene terephthalate film exiting the first laminating wheel after being pressed together are obtuse angles.
Further, the linear velocity difference between the first laminating wheel and the second laminating wheel is as follows: 0 to-0.80 percent;
Figure GDA0003967301150000021
furthermore, the included angle formed by the tangent point of the pressed film sheet entering angle wheel, the tangent point of the pressed film sheet exiting angle wheel and the axis of the angle wheel is an acute angle.
Furthermore, an elastic layer is arranged on the wheel surface of the second laminating wheel, and the first laminating wheel and the second laminating wheel are in contact and tangent.
Further, the wheel face of first laminating wheel and third wheel is the rigidity layer, and first laminating wheel and the setting of second laminating wheel face clearance, clearance between first laminating wheel and the second laminating wheel face is less than or equal to the thickness sum that polyethylene terephthalate film and peel ply are the polyethylene film.
Furthermore, the base material of the stripping material is a polyethylene terephthalate film, and the adhesive force between the base material and the glass layer is 2-20 g/25mm.
Furthermore, the bonding pressure of the base material polyethylene terephthalate and the polyethylene of the stripping layer in the stripping material is 0.5-8 kg/25mm.
Further, the thickness of the base material is 30 to 50 μm, and the thickness of the peeling layer is 25 to 40 μm. The polyethylene terephthalate film is guided into the first laminating wheel by a first guide wheel, and the peeling layer is a polyethylene film guided into the second laminating wheel by a second guide wheel.
The beneficial effects produced by the invention comprise: one of the composite stripping materials comprises a composite stripping material film which comprises a polyethylene layer and a polyethylene terephthalate film layer, so that the production cost can be greatly reduced; the two devices drive the driven wheel through the driving wheel to adjust the feeding amount of the two diaphragms, and then the coating angle is adjusted through the angle wheel, so that the purpose of adjusting the rake angle is achieved. The third wheel is not in direct contact with the film, and is driven through the initiative drive, and the PE film extension is carried out to alleviate the relative slip that brings because of the speed difference between two action wheels and the control perk direction is got.
The curling property of the material is adjusted by controlling the speed ratio of the rollers, forming the speed difference and adjusting the in-out joint angle to increase or reduce the joint coating angle, the polyester film and the polyethylene protective film are controlled to joint when the tension control reaches the optimal extension ratio, and the joint coating angle is controlled to adjust the rake angle of the stripping material, so that the polyester film and the polyethylene protective film are used as substitute materials in the polarizing plate manufacturing process, and the problems that the subsequent stripping material is too high in warping to cause the failure of automatic production continuous cloth connecting machine cloth connecting, the reduction of the frame rate, the increase of the loss and other influences are avoided.
Drawings
FIG. 1 is a block diagram of the apparatus of the present invention;
FIG. 2 illustrates a semi-finished product of a conventional stripping material, i.e., a diaphragm polarizer + PE film;
FIG. 3 shows a film protective film (PET + PSA + release film) used for a conventional release material;
FIG. 4 is a schematic view of a film of the present invention after lamination showing a warp angle;
FIG. 5 shows a release agent prepared by the apparatus of the present invention.
In the figure, 1, a first attaching wheel, 2, a second attaching wheel, 3, a third wheel, 4, a first leading-in wheel, 5, a second leading-in wheel, 6 and an angle wheel (the angle wheel can be adjusted up and down);
in the figure, 2, 7, a polarizing plate semi-finished product, 8 and a PE protective film;
in the figure, 3, 9, PET film + PSA glue, 10, release film;
in the figure, 4, 11, PET film, 12, PE film, 13, measuring table;
in the figure, 5, 11, PET film, 12, PE film.
Detailed Description
The present invention is explained in further detail below with reference to the drawings and the specific examples, but it should be understood that the scope of the present invention is not limited to the specific examples.
As shown in fig. 1, a stripping material production apparatus of the present invention comprises a first applying wheel 1, a second applying wheel 2, a third wheel 3, a first introducing wheel 4, a second introducing wheel 5 and an angle wheel 6, wherein the first applying wheel 1 controls the feeding amount of a polyethylene terephthalate film 11, which is a base material of a stripping material; the second laminating wheel 2 controls the feeding amount of a polyethylene film 12, wherein the polyethylene film 12 (PE) is a stripping layer of a stripping material;
the wheel surface of the first attaching wheel 1 and the wheel surface of the second attaching wheel 2 are attached or arranged in a gap mode, if the attaching is arranged, the attaching is tangential, if the gap is arranged, the gap between the attaching wheels is very small and is smaller than the sum of the thicknesses of the two films, so that the two films can be bonded through the wheel surface in a pressing mode when passing through the gap, the polyethylene terephthalate film 11 and the polyethylene film 12 enter from the position between the first attaching wheel 1 and the second attaching wheel 2, are bonded together after being pressed through the first attaching wheel 1 and the second attaching wheel 2, and then are led out to the angle wheel 6; the angle wheel 6 is used for adjusting the coating angle, the film and the angle wheel 6 form a right angle of 90 degrees, the contact surface of the lower edge of the angle wheel and the film is a zero point, the angle wheel 6 is adjusted to be positive upwards, the angle wheel 6 is negative downwards, and the angle wheel can be adjusted up and down;
according to the invention, the second laminating wheel 2 is driven by the third wheel 3, the third wheel 3 is a driving wheel, the second laminating wheel 2 is a driven wheel, when the linear velocity of the second laminating wheel 2 needs to be adjusted, the linear velocity is adjusted by adjusting the third wheel 3, the first laminating wheel 1 and the third wheel 3 are respectively driven by the first servo motor and the second servo motor, the first servo motor and the second servo motor are both connected with a control cabinet, and the control cabinet controls the rotating speeds of the first servo motor and the second servo motor through electric signals. The linear speed of the first laminating wheel 1 and the second laminating wheel 2 is controlled to be 0-100M/min. The bonding width of the bonding wheel is 0 mm-3000 mm. In the attaching process, the PE film is provided with no adhesive and has self-adhesion to be attached to the PET film; third wheel 3 does not carry out PE membrane extension and control the perk direction with membrane direct contact, and is driven through the initiative drive, has alleviated between first laminating wheel 1 and the second laminating wheel 2 because of the relative slip that the speed difference brought.
In this embodiment, be provided with the elastic layer on the wheel face of first laminating wheel 1 and second laminating wheel 2, first laminating wheel 1 and second laminating wheel 2 contact and tangent, even first laminating wheel 1 and second laminating wheel 2 wheel face contact, nevertheless owing to have elasticity, when the membrane gets into between two wheel faces, still hinder the rotation of two laminating wheels, if the wheel face of first laminating wheel 1 and second laminating wheel 2 all does not have elasticity, then first laminating wheel 1 and second laminating wheel 2 wheel face clearance setting, the clearance between first laminating wheel 1 and second laminating wheel 2 wheel face is less than the thickness sum of polyethylene terephthalate membrane 11 and polyethylene membrane 12.
The axes of the first laminating wheel 1, the second laminating wheel 2, the third wheel 3, the first leading-in wheel 4, the second leading-in wheel 5 and the angle wheel 6 are all parallel to each other, the visual angle of the device viewed along the axis direction of each wheel is shown as figure 1, the device is introduced according to the visual angle of figure 1, the circle where the first laminating wheel 1 is located is a, the circle where the second laminating wheel 2 is located is b, the circle where the third wheel 3 is located is c, the circle where the angle wheel 6 is located is d, the angle between the PE film entering the second laminating wheel 2 and the PET film coming out of the second laminating wheel 2 after lamination is an acute angle, the angle between the PET film entering the first laminating wheel 1 and the PET film coming out of the first laminating wheel 1 after lamination is an obtuse angle, the included angle of the film entering angle wheel 6 and the film exiting angle wheel 6 after being pressed is an acute angle, if the film exiting from the pressing wheel at the position is negative, if the angle between the PE film entering the second laminating wheel 2 and the angle between the PE film exiting the second laminating wheel 2 after being pressed is an obtuse angle, the angle between the PET film entering the first laminating wheel 1 and the angle between the PET film exiting the first laminating wheel 1 after being pressed is an acute angle, the position of the angle wheel 6 is positive, the position shown in figure 1 is used, namely PET enters from the upper part, PE enters from the lower part, the film after being pressed exits from the horizontal direction and enters the angle wheel 6, the position of the angle wheel 6 is 0, the angle wheel 6 is negative from the lower part, and the angle wheel 6 is positive from the upper part.
In the embodiment, the base material of the stripping material is a polyethylene terephthalate film 11, and the adhesive force between the base material and the glass layer is 2-20 g/25mm.
The speed difference between the first attaching wheel 1 and the second attaching wheel 2 is 0 to-0.80 percent, the attaching pressure of the polyethylene terephthalate as the base material and the polyethylene as the stripping layer in the stripping material is 0.5 to 8kg/25mm, the thickness of the base material is 30 to 50 mu m, and the thickness of the stripping layer is 25 to 40 mu m.
Figure GDA0003967301150000051
The position of the angle wheel 6 is 50mm.
A substitute material used in the coating process of the polarizing plate is applied to the PSA coating process and is sequentially stacked with a polarizing plate component to form the polarizing plate by upper TAC, a polarizing sublayer and lower TAC, and a film connecting and stripping material is used for simulating the film tearing process of the polarizing plate, so that the loss of the polarizing plate is reduced. The holding force of Polyethylene (PE) to polyethylene terephthalate (PET) is 518400 seconds or more. As a method of applying the release material, a roll coater, a dual-drive main speed wheel, a non-drive applying rubber wheel, and an applying MD wheel 6 are preferably used.
The device bonding method of the invention: the feeding speed of the lower PE can be finely adjusted by taking the feeding speed V0 of the PET film as a reference, so that the feeding amount of the lower PE is controlled; in addition, the characteristic of the material is used for adjusting the value of the speed difference to correspond to PE with different properties, and the warping is adjusted to be in a proper condition;
the upper-PET film is made of a high polymer film material with good transparency and mechanical properties, such as a material of polyethylene terephthalate (PET); the thickness of the upper-PET is 30 um-120 um, and the light transmittance is more than 89%.
lower-PE film: the lower PE has a thickness of 30-100um, and the attached body is not easily contaminated due to the fact that the adhesive is not coated, the material is mainly protected from foreign matters and dirt and is not damaged by the outside, and in addition, the lower PE has a low stripping case and a high recycling rate.
Implementation of the warp adjustment: FIG. 3 is a schematic diagram showing the bonding of PET and lower PE on a polarizer according to the present invention, wherein PET '/PE' is the upper PET/lower PE in the structure of the release material. The first laminating wheel is in direct contact with the PET film; a first servo motor: controlling the linear speed of the first laminating wheel 1; a second servo motor: controlling the linear velocity of the third wheel 3 and providing the same linear velocity to the second laminating wheel 2; the signal control cabinet: providing signals to the first and second servo motors, and operating the whole set of laminating system by inputting the rotating speed of the first laminating wheel 1 and the difference between the rotating speed of the third wheel 3 and the speed of the second laminating wheel 2 into the control system;
the warpage adjusting effect is as follows:
this experiment adopts PET, PE material to make up, and first laminating wheel 1 utilizes the speed difference (%) with third wheel 3, and the test data is as follows 1:
Figure GDA0003967301150000061
table 1 feed speed differential test data via warp
Figure GDA0003967301150000062
This experiment adopts PET, PE material to make up, utilizes the 6 positions of angle wheel to test, and the data is as follows table 2:
table 2 warp utilization angle wheel 6 position test data
Figure GDA0003967301150000063
Figure GDA0003967301150000071
The method for measuring the position of the angle wheel 6 comprises the following steps:
the film and the angle wheel 6 are in a right angle of 90 degrees and are taken as a zero point, when the angle wheel is at the zero point, the distance from the film to the film and the distance from the film to the angle wheel are 30CM, the lower edge of the angle wheel and the contact surface of the film are taken as a zero point reference, the angle wheel 6 is adjusted to be positive upwards, the angle wheel 6 is adjusted to be negative downwards, and a standard ruler is used for measuring the distance between the zero point and the lower edge of the angle wheel and the contact surface of the film.
The above table shows that 1. When polyethylene terephthalate (PET) and a polyethylene protective film (PE) are bonded, the body tilt angle is more negative when the rotation speed difference is positive.
2. When polyethylene terephthalate (PET) and polyethylene protective film (PE) materials are adhered, the body rake angle tends to be positive when the rotating speed difference is negative.
3. When polyethylene terephthalate (PET) is bonded to a polyethylene protective film (PE), a more negative bonding speed difference is required to guide the material to become positive warping due to the large deformation of the PE.
The speed difference is determined according to the characteristics of each material and the test result, and the speed difference is adjusted within +/-4 percent, preferably-0.8 percent to-2 percent. The method for measuring the warpage of the stripping material body comprises the following steps:
cutting the stripping material into A4 size, placing the stripping material on platforms at two sides of marble, confirming the warping direction of the stripping material (warping towards the PE surface or towards the PET, the PET film upwards is drawn by the attraction force to be positive warping, the PET film upwards is drawn by the attraction force to be negative warping) and then placing the stripping material on a flat measuring table (the warping direction is upwards placed), and then measuring the height H (shown in figure 2) of the body of the stripping material by using a standard ruler, wherein the warping or the absolute value of H of the body is slightly positive and better.
In the production process of the composite stripping material film, the polyethylene protective film material has better tensile ductility so that the binding surface of the film material is poor in curling under high-tension binding, the automatic film splicing machine fails to splice cloth, the production efficiency is reduced, the dynamic rate of a machine frame is reduced, and the labor force of personnel is improved.
If the speeds V0 of the laminating wheels driving the upper film and the lower film are the same, the film feeding amounts of the upper PET, the lower PET and the PE in the laminating process are the same, and after the peeling material body is extended by the PE due to the difference of the stretching deformation amounts of the lower PE, the warpage is caused due to the difference of the deformation amounts of the lower PE.
The preparation device provided by the invention controls the speed difference formed by the speed ratio of the upper driving wheel and the lower driving wheel through the three-shaft type dual-drive roller, the lower driving wheel is utilized to drive the rubber laminating wheel to prevent the film surface from being scratched, the different sticking of the feeding amount is controlled to achieve the desired warping amount, and the wrap angle of the stuck material is changed by changing the in-out sticking angle to increase or reduce the sticking wrap angle, so that the purpose of adjusting the warping angle is achieved.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and are not intended to indicate or imply that the device or assembly so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the content of the embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the technical scope of the present invention, and any changes and modifications made are within the protective scope of the present invention.

Claims (5)

1. A preparation facilities of stripping material which characterized in that: the stripping material comprises a polyethylene layer and a polyethylene terephthalate layer, the polyethylene layer is a polyethylene film, the polyethylene terephthalate is a polyethylene terephthalate membrane, and the polyethylene film is attached to the polyethylene terephthalate membrane; the preparation device comprises a first attaching wheel for controlling the feeding amount of the polyethylene terephthalate film;
a second laminating wheel for controlling the feeding amount of the polyethylene film;
the wheel surface of the first laminating wheel is attached to the wheel surface of the second laminating wheel or arranged in a gap mode, and the polyethylene terephthalate film and the polyethylene film enter the space between the first laminating wheel and the second laminating wheel and are bonded after being pressed by the first laminating wheel and the second laminating wheel;
the polyethylene terephthalate film and the polyethylene film are attached and then led out through an angle wheel for adjusting the coating angle;
the second laminating wheel is driven by a third wheel, the third wheel is a driving wheel, and the second laminating wheel is a driven wheel; the included angle formed by the tangent point of the pressed film sheet entering angle wheel, the tangent point of the pressed film sheet exiting angle wheel and the axis of the angle wheel is an acute angle;
elastic layers are arranged on the wheel surfaces of the first attaching wheel and the second attaching wheel, and the first attaching wheel and the second attaching wheel are contacted and tangent;
the wheel surfaces of the first laminating wheel and the second laminating wheel are both rigid layers, the wheel surfaces of the first laminating wheel and the second laminating wheel are arranged in a gap mode, and the gap between the wheel surfaces of the first laminating wheel and the second laminating wheel is smaller than or equal to the sum of the thicknesses of a polyethylene terephthalate film and a polyethylene film;
the linear velocity difference of first laminating wheel and second laminating wheel does: 0 to-0.80 percent;
Figure FDA0003967301140000011
2. the apparatus for producing a release material according to claim 1, characterized in that: the polyethylene terephthalate film is a base material of a stripping material, and the polyethylene film is a stripping layer of the stripping material; the thickness of the base material is 30-50 μm, and the thickness of the stripping layer is 25-40 μm.
3. The apparatus for producing a release material according to claim 1, characterized in that: first laminating wheel and third wheel drive through first servo motor and second servo motor respectively, first servo motor and second servo motor all connect the switch board, switch board electrical signal control first servo motor and second servo motor's rotational speed.
4. The apparatus for producing a release material according to claim 1, characterized in that: the angle between the polyethylene film entering the second laminating wheel and the second laminating wheel after being pressed is an acute angle, and the angle between the polyethylene terephthalate film entering the first laminating wheel and the first laminating wheel after being pressed is an obtuse angle.
5. The apparatus for producing a release material according to claim 1, characterized in that: the base material of the stripping material is a polyethylene glycol terephthalate film, and the adhesive force between the base material and the glass layer is 2-20 g/25 mm; the bonding pressure of the polyethylene terephthalate and the polyethylene of the release layer is 0.5-8 kg/25mm.
CN202010749363.0A 2020-07-30 2020-07-30 Stripping material and preparation device thereof Active CN111907176B (en)

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Publication number Priority date Publication date Assignee Title
CN102218873A (en) * 2010-04-14 2011-10-19 太仓新宏电子科技有限公司 Die-cutting protective membrane used for surface protection
CN102991060B (en) * 2012-12-12 2016-03-09 意力(广州)电子科技有限公司 Diaphragm production technology
TWI653134B (en) * 2015-07-20 2019-03-11 住華科技股份有限公司 Optical film warpage improvement device and method
TWI660205B (en) * 2017-11-16 2019-05-21 住華科技股份有限公司 Manufacturing method of polarizing plate
CN108121030B (en) * 2017-12-13 2021-07-27 恒美光电股份有限公司 Method for adjusting warping of polaroid

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