CN116901603B - Transfer printing method and transfer printing system for non-rectangular coating - Google Patents
Transfer printing method and transfer printing system for non-rectangular coating Download PDFInfo
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- CN116901603B CN116901603B CN202311168064.8A CN202311168064A CN116901603B CN 116901603 B CN116901603 B CN 116901603B CN 202311168064 A CN202311168064 A CN 202311168064A CN 116901603 B CN116901603 B CN 116901603B
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- 238000000576 coating method Methods 0.000 title claims abstract description 259
- 239000011248 coating agent Substances 0.000 title claims abstract description 257
- 238000010023 transfer printing Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000000758 substrate Substances 0.000 claims abstract description 45
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 238000012546 transfer Methods 0.000 claims description 54
- 238000003825 pressing Methods 0.000 claims description 42
- 125000006850 spacer group Chemical group 0.000 claims description 27
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 20
- 230000008859 change Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 36
- 230000008569 process Effects 0.000 description 23
- 239000000306 component Substances 0.000 description 20
- 239000012528 membrane Substances 0.000 description 20
- 239000003054 catalyst Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 12
- 238000007599 discharging Methods 0.000 description 9
- 230000003197 catalytic effect Effects 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 238000010923 batch production Methods 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
- B41M5/03—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F16/00—Transfer printing apparatus
- B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F16/00—Transfer printing apparatus
- B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
- B41F16/0073—Transfer printing apparatus for printing from an inked or preprinted foil or band with means for printing on specific materials or products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F16/00—Transfer printing apparatus
- B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
- B41F16/0093—Attachments or auxiliary devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
- H01M4/8828—Coating with slurry or ink
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
- H01M4/8864—Extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2219/00—Printing presses using a heated printing foil
- B41P2219/20—Arrangements for moving, supporting or positioning the printing foil
- B41P2219/22—Guiding or tensioning the printing foil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2219/00—Printing presses using a heated printing foil
- B41P2219/40—Material or products to be decorated or printed
- B41P2219/42—Sheet-like material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A transfer printing method and a transfer printing system of a non-rectangular coating belong to the technical field of coating transfer printing; the method comprises the following steps: obtaining a non-rectangular coating; a gasket is arranged on the basal layer, and a non-rectangular coating is arranged on the basal layer to obtain a component to be pressed; simultaneously rolling the non-rectangular coating and the gasket in the component to be pressed to finish rolling transfer printing of the coating body; the gasket and the non-rectangular coating are simultaneously arranged on the substrate layer before rolling, so that the gasket and the non-rectangular coating bear pressure in the rolling process, and the maximum difference value of the contact area change of the gasket and the non-rectangular coating when passing through the press roller and the press roller is smaller than the maximum difference value of the contact area change of the coating body when passing through the press roller, so that the reduction of the pressure difference born by the coating body when passing through the press roller is realized, and the problem of poor product consistency when transferring the non-rectangular coating by adopting rolling transfer printing is solved.
Description
Technical Field
The application relates to the technical field of coating transfer printing, in particular to a transfer printing method and a transfer printing system for a non-rectangular coating.
Background
The core component of the fuel cell is a membrane electrode, and currently, the preparation of the membrane electrode can be divided into three methods: transfer method (decal transfer method), CCM (catalyst-coated membrane) method, and GDL method. The transfer printing method generally comprises the steps of coating catalyst slurry on a transfer printing substrate, drying to form a catalytic layer, combining the catalytic layer with a proton exchange membrane through hot pressing, and removing the transfer printing substrate to transfer the catalytic layer from the transfer printing substrate to the proton exchange membrane. The transfer printing method generally comprises two processes of plate transfer printing and roll transfer printing, the thickness of the CCM of the hydrogen fuel cell is generally only tens of micrometers, and the thickness is too thin, and when the CCM is prepared by using the plate transfer printing method, the pressure uniformity of the CCM is generally ensured by adopting an air pressure mode on an upper pressing plate. But is limited by the reasons such as gasbag material, the pressure is lower in the transfer printing process, can only guarantee the transfer printing effect through extension heating time, and the dull and stereotyped transfer printing method is only applicable to the sheet material transfer printing simultaneously, therefore whole process inefficiency is not applicable to batch production operation. The pressure is generally controlled through an oil cylinder or an electric cylinder in the rolling transfer printing process, the higher pressure can be realized in the transfer printing process, and the transfer printing effect can be ensured by short-time hot pressing. Meanwhile, the roll transfer printing is not only suitable for sheet materials, but also suitable for coil materials, and continuous production can be realized when the coil materials are used for transfer printing, so that the requirement of batch production is met. But roll transfer gives poor consistency in the product when transferring non-rectangular coatings.
Disclosure of Invention
The application provides a transfer printing method and a transfer printing system for a non-rectangular coating, which can solve the problem of poor product consistency when the non-rectangular coating is transferred by adopting roll transfer printing.
In a first aspect, embodiments of the present application provide a transfer printing method of a non-rectangular coating, the method including:
obtaining a non-rectangular coating, wherein the non-rectangular coating comprises a transfer printing substrate and a coating body attached to the transfer printing substrate, and the contact area of the coating body and a press roller is different when the coating body passes through the press roller of the roll transfer printing along the roll transfer printing direction;
providing a gasket on a substrate layer, and placing the non-rectangular coating on the substrate layer, so that the gasket and the non-rectangular coating are combined to obtain a component to be pressed to reduce the pressure difference born by the coating body when passing through the press roller;
and simultaneously rolling the non-rectangular coating and the gasket in the to-be-pressed assembly to finish rolling transfer printing of the coating body.
In the implementation process, the gasket and the non-rectangular coating are simultaneously arranged on the substrate layer before rolling to form the to-be-pressed component, so that the gasket and the non-rectangular coating bear pressure in the rolling process, and the maximum difference value of the change of the contact area between the gasket and the to-be-pressed component formed by the non-rectangular coating and the pressing roller is smaller than the maximum difference value of the change of the contact area between the coating body and the pressing roller when the coating body passes through the pressing roller, so that the reduction of the pressure difference born by the coating body when the coating body passes through the pressing roller is realized, and the problem of poor product consistency when the non-rectangular coating is transferred by adopting rolling transfer printing is further solved.
As an alternative embodiment, the maximum contact area S of the coating body with the press roller is the same as the press roller Maximum 1 Minimum contact area S of the coating body and the press roller Very small 1 Maximum contact area S of the component to be pressed and the press roller Maximum 2 And the minimum contact area S of the component to be pressed and the press roller Very small 2 The following relationship is satisfied: s is S Maximum 2 -S Very small 2 ＜S Maximum 1 -S Very small 1 。
In the implementation process, the maximum difference value of the contact area change of the gasket and the non-rectangular coating to be pressed when passing through the press roller is smaller than the maximum difference value of the contact area change of the coating body and the press roller when passing through the press roller, so that the reduction of the pressure difference born by the coating body when passing through the press roller is realized, and the problem of poor product consistency when transferring the non-rectangular coating by adopting the rolling transfer printing is further solved.
As an alternative embodiment, the thickness H1 of the spacer is not less than the thickness H2 of the non-rectangular coating.
In the implementation process, the thickness of the gasket is controlled to be not smaller than that of the non-rectangular coating, so that the press roller is firstly contacted with the gasket when pressure is applied, and then contacted with the non-rectangular coating after the gasket is pressed down, the gasket and the non-rectangular coating are pressed down together, the gasket participates in the pressing down process of the non-rectangular coating, and the consistency of products when the non-rectangular coating is transferred by adopting the rolling transfer printing is further improved.
As an alternative embodiment, the relationship between the thickness H1 of the shim and the thickness H2 of the non-rectangular coating satisfies: h1—h2=2 to 5 μm.
In the implementation process, the thickness of the gasket is controlled to be 2-5 mu m larger than that of the non-rectangular coating, so that the precision requirement of the thickness in the process of preparing the gasket can be reduced to a certain extent, the thickness of the gasket can be easily realized to be larger than that of the non-rectangular coating, and further the gasket and the non-rectangular coating bear pressure together in the whole rolling process. Meanwhile, the material consumption of the gasket can be reduced, and the material waste is reduced.
As an alternative embodiment, the relationship of the compression Δh1 of the gasket, the compression Δh2 of the non-rectangular coating, the thickness H1 of the gasket, and the thickness H2 of the non-rectangular coating, at the same pressure, satisfies: ΔH2+ (H1-H2) with ΔH2.
In the implementation process, by controlling the relation among the compression amount delta H1 of the gasket, the compression amount delta H2 of the non-rectangular coating, the thickness H1 of the gasket and the thickness H2 of the non-rectangular coating, the following conditions are satisfied: ΔH2+ (H1-H2) so that the gasket still has a compression margin when the non-rectangular coating is compressed to a target thickness, thereby reducing the compression influence of the gasket on the non-rectangular coating.
As an alternative embodiment, the relationship of the compression Δh1 of the gasket, the compression Δh2 of the non-rectangular coating, the thickness H1 of the gasket, and the thickness H2 of the non-rectangular coating, at the same pressure, satisfies: Δh1=Δh2+ (h1—h2) +2μm.
As an alternative embodiment, the outer contour of the gasket is rectangular, and the gasket is provided with a containing cavity for containing the non-rectangular coating.
In the implementation process, the gasket with the rectangular outer contour can enable the contact area between the gasket and the pressing roller to be unchanged when the gasket and the non-rectangular coating form the to-be-pressed assembly and the contact area between the gasket and the pressing roller are used for passing through the pressing roller, and the consistency of products when the non-rectangular coating is transferred by adopting the rolling transfer printing can be further improved.
As an alternative embodiment, the shape of the receiving cavity matches the shape of the non-rectangular coating; and/or
The cross-sectional area of the accommodating cavity is larger than that of the non-rectangular coating so as to facilitate placement of the non-rectangular coating.
In the implementation process, the shape of the accommodating cavity is matched with the shape of the non-rectangular coating, so that the relative positions of the gasket and the non-rectangular coating are easier to be kept unchanged when the gasket and the non-rectangular coating are placed, and the consistency of all finally manufactured products is improved. The cross-sectional area of the accommodating cavity is larger than that of the non-rectangular coating, so that convenience in placing the non-rectangular coating in the accommodating cavity is effectively improved.
As an alternative embodiment, the thickness of the transfer printing substrate in the non-rectangular coating is 100-150 μm; and/or
The thickness of the coating body in the non-rectangular coating is 10-50 mu m.
In a second aspect, embodiments of the present application provide a transfer system for a non-rectangular coating, the system comprising:
a base layer supply unit for providing a base layer;
a spacer providing unit for providing a spacer on the base layer;
a non-rectangular coating providing unit for placing a non-rectangular coating on the base layer so that the gasket and the non-rectangular coating are combined to obtain a component to be pressed, wherein the non-rectangular coating comprises a transfer printing base material and a coating body attached to the transfer printing base material, and the contact area of the coating body and a pressing roller is different when passing through the pressing roller of the rolling transfer printing along the rolling transfer printing direction; and
the rolling transfer printing unit is used for simultaneously rolling the non-rectangular coating and the gasket in the component to be pressed so as to finish rolling transfer printing of the coating body; the roll transfer unit communicates with the base layer supply unit, the spacer supply unit, and the non-rectangular coating supply unit to receive the base layer, the spacer, and the non-rectangular coating.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic illustration of a contact process between a press roll and a non-rectangular coating provided by an embodiment of the present application;
FIG. 2 is a flow chart of a method provided by an embodiment of the present application;
FIG. 3 is a schematic diagram of a transfer printing system according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a to-be-pressed assembly according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a to-be-pressed assembly according to an embodiment of the present application;
fig. 6 is a schematic structural diagram III of a to-be-pressed assembly according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a to-be-pressed assembly according to an embodiment of the present application;
FIG. 8 is a schematic view of the cross-section at A-A of FIG. 4 in a natural state;
FIG. 9 is a schematic view of the cross-section at A-A in FIG. 4 in a pressurized condition;
FIG. 10 is a graph showing the comparison of the color development results of the pressure-sensitive papers provided in example 1 and comparative example 1;
FIG. 11 is a schematic view of the rolling process of example 2 and comparative example 2;
fig. 12 is a thickness comparison chart after transfer of example 2 and comparative example 2.
Icon: 1-a substrate layer supply unit; 11-a substrate layer discharge roller; 12, a product receiving roller; a 2-spacer providing unit; 21-a gasket discharging roller; 22-a gasket material receiving roller; 3-a non-rectangular coating providing unit; 4-a roll transfer unit; 41-a roll-in assembly; 411-pressing rolls; 42-receiving a conveyor belt assembly; 421-a conveyor roller set; 422-a conveyor belt body; 43-a direction-changing roller set; 431—a first turning roll; 432-second direction-changing roller; 5-a chamber preparation unit; 6-a separation unit; 7-non-rectangular coating; 71-transferring the substrate; 72-coating the body; 8-a gasket; 81-a receiving chamber; 9-a substrate layer; e1-a first contact region; e2—a second contact region; e3—a third contact region.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present application are commercially available or may be prepared by existing methods.
Various embodiments of the application may exist in a range of forms; it should be understood that the description in a range format is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the application; it is therefore to be understood that the range description has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that a description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5, and 6, wherever applicable. In addition, whenever a numerical range is referred to herein, it is meant to include any reference number (fractional or integer) within the indicated range.
In the present application, unless otherwise specified, terms such as "upper" and "lower" are used specifically to refer to the orientation of the drawing in the figures. In addition, in the description of the present specification, the terms "include", "comprising" and the like mean "including but not limited to". Relational terms such as "first" and "second", and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Herein, "and/or" describing an association relationship of an association object means that there may be three relationships, for example, a and/or B, may mean: a alone, a and B together, and B alone. Wherein A, B may be singular or plural. Herein, "at least one" means one or more, and "a plurality" means two or more. "at least one", "at least one" or the like refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, "at least one (individual) of a, b, or c," or "at least one (individual) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple, respectively.
The core component of the fuel cell is a membrane electrode, and currently, the preparation of the membrane electrode can be divided into three methods: transfer method (decal transfer method), CCM (catalyst-coated membrane) method, and GDL method. The transfer printing method generally comprises the steps of coating catalyst slurry on a transfer printing substrate, drying to form a catalytic layer, combining the catalytic layer with a proton exchange membrane through hot pressing, and removing the transfer printing substrate to transfer the catalytic layer from the transfer printing substrate to the proton exchange membrane. The transfer printing method generally comprises two processes of plate transfer printing and roll transfer printing, the thickness of the CCM of the hydrogen fuel cell is generally only tens of micrometers, and the thickness is too thin, and when the CCM is prepared by using the plate transfer printing method, the pressure uniformity of the CCM is generally ensured by adopting an air pressure mode on an upper pressing plate. But is limited by the reasons such as gasbag material, the pressure is lower in the transfer printing process, can only guarantee the transfer printing effect through extension heating time, and the dull and stereotyped transfer printing method is only applicable to the sheet material transfer printing simultaneously, therefore whole process inefficiency is not applicable to batch production operation. The pressure is generally controlled through an oil cylinder or an electric cylinder in the rolling transfer printing process, the higher pressure can be realized in the transfer printing process, and the transfer printing effect can be ensured by short-time hot pressing. Meanwhile, the roll transfer printing is not only suitable for sheet materials, but also suitable for coil materials, and continuous production can be realized when the coil materials are used for transfer printing, so that the requirement of batch production is met. But roll transfer gives poor consistency in the product when transferring non-rectangular coatings.
The inventors found that: when the non-rectangular coating 7 is subjected to roll transfer, as shown in fig. 1, the contact areas of the press roller 411 and the non-rectangular coating 7 are continuously changed, and as analysis shows that three areas of the non-rectangular coating 7, which are in contact with the press roller 411 during the roll transfer, are respectively a first contact area E1, a second contact area E2 and a third contact area E3, the areas s1+.s2+.s3 of the first contact area E1, the second contact area E2 and the third contact area E3, the pressure exerted by the press roller 411 on the non-rectangular coating 7 is the same, and the pressures of the first contact area E1, the second contact area E2 and the third contact area E3 are respectively the pressures F of p1=411/the first contact area E1, the pressure F2 area S2 of the second contact area E2 and the pressure F3 area S3 of p3=411, so that the pressure changes at the moment on the non-rectangular coating 7 during the roll transfer, the pressure changes at the moment on the non-rectangular coating 7, and the non-rectangular coating 7 are different in thickness, and thus the non-rectangular coating 7 are different in thickness, and the non-rectangular coating is caused.
To solve the problem of poor product uniformity when transferring non-rectangular coating 7 by roll transfer, the inventors have intended to reduce the magnitude of pressure variation on non-rectangular coating 7 during roll transfer by providing shims 8 around non-rectangular coating 7 to receive the pressure of press roll 411 in conjunction with non-rectangular coating 7.
As shown in fig. 2, an embodiment of the present application provides a transfer printing method of a non-rectangular coating 7, the method including:
s1, obtaining a non-rectangular coating 7, wherein the non-rectangular coating 7 comprises a transfer printing substrate 71 and a coating body 72 attached to the transfer printing substrate 71, and the contact area between the coating body 72 and a press roller 411 is different when passing through the press roller 411 of the roll transfer printing along the roll transfer printing direction;
the non-rectangular coating 7 refers to a coating having a non-uniform coating length in the extending direction of the pressing roller 411. Since the contact width of the pressing roller 411 and the coating layer is the same, the contact area of the pressing roller 411 and the coating layer is different due to the non-uniform length thereof, and thus the pressure variation is caused.
S2, arranging a gasket 8 on a substrate layer 9, and placing the non-rectangular coating 7 on the substrate layer 9, so that the gasket 8 and the non-rectangular coating 7 are combined to obtain a to-be-pressed assembly to reduce pressure difference born by the coating body 72 when passing through the pressing roller 411; in some embodiments, the substrate layer 9 may be a proton membrane.
As shown in fig. 4 to 7, the combination of the gasket 8 and the non-rectangular coating 7 to obtain the assembly to be pressed to bear pressure together can be realized by adopting a single gasket 8 or can be realized by adopting a gasket 8 group formed by a plurality of gaskets 8.
In some embodiments, the maximum contact area S of the coating body 72 with the press roller 411 is the same as the press roller 411 Maximum 1 Minimum contact area S of the coating body 72 with the press roller 411 Very small 1 Maximum contact area S of the component to be pressed with the pressing roller 411 Maximum 2 And the minimum contact area S of the component to be pressed and the pressing roller 411 Very small 2 The following relationship is satisfied: s is S Maximum 2 -S Very small 2 ＜S Maximum 1 -S Very small 1 。
The maximum contact area of the coating body 72 with the pressing roller 411 means an area where the pressing roller 411 contacts with the maximum length area of the coating body 72 in the extending direction of the pressing roller 411. The minimum contact area of the coating body 72 with the pressing roller 411 means an area where the pressing roller 411 contacts with a minimum length region of the coating body 72 in the extending direction of the pressing roller 411. The maximum contact area of the component to be pressed with the pressing roller 411 means the contact area of the pressing roller 411 and the maximum length area of the component to be pressed along the extending direction of the pressing roller 411. The minimum contact area of the component to be pressed with the pressing roller 411 means an area where the pressing roller 411 contacts with a minimum length region of the component to be pressed along the extending direction of the pressing roller 411. Wherein the length of the component to be pressed refers to the sum of the length of the coating body 72 and the length of the gasket 8.
By making the maximum difference between the contact area of the pad 8 and the non-rectangular coating 7 and the contact area of the pressing roller 411 when passing through the pressing roller 411 smaller than the maximum difference between the contact area of the coating body 72 and the contact area of the pressing roller 411 when passing through the pressing roller 411, the reduction of the pressure difference born by the coating body 72 when passing through the pressing roller 411 is realized, and the problem of poor product consistency when transferring the non-rectangular coating 7 by adopting rolling transfer is further improved.
In some embodiments, as shown in fig. 8 and 9, the thickness H1 of the spacer 8 is not less than the thickness H2 of the non-rectangular coating 7. The thickness of the non-rectangular coating 7 refers to the sum of the thicknesses of the transfer substrate 71 and the coating body 72. By controlling the thickness of the gasket 8 to be not smaller than the thickness of the non-rectangular coating 7, the press roller 411 can be firstly contacted with the gasket 8 when pressure is applied, and then contacted with the non-rectangular coating 7 after the gasket 8 is pressed down, so that the gasket 8 and the non-rectangular coating 7 are pressed down together, the gasket 8 participates in bearing pressure together in the pressing down process of the non-rectangular coating 7, and the consistency of products when the non-rectangular coating 7 is transferred by adopting the rolling transfer printing is further improved.
Further, the relation between the thickness H1 of the spacer 8 and the thickness H2 of the non-rectangular coating 7 satisfies: h1—h2=2 to 5 μm. The thickness of the gasket 8 is controlled to be 2-5 mu m larger than the thickness of the non-rectangular coating 7, so that the precision requirement of the thickness in the process of preparing the gasket 8 can be reduced to a certain extent, the thickness of the gasket 8 can be easily realized to be larger than the thickness of the non-rectangular coating 7, and the gasket 8 and the non-rectangular coating 7 can bear pressure together in the whole rolling process. And meanwhile, the material consumption of the gasket 8 can be reduced, and the material waste is reduced.
In some embodiments, the relationship of the compression Δh1 of the gasket 8, the compression Δh2 of the non-rectangular coating 7, the thickness H1 of the gasket 8, and the thickness H2 of the non-rectangular coating 7, at the same pressure, satisfies: ΔH2+ (H1-H2) with ΔH2.
The compression amount Δh1 of the gasket 8 refers to the deformation amount of the gasket 8 under a certain pressure. The compression amount Δh2 of the non-rectangular coating 7 refers to the deformation amount of the non-rectangular coating 7 under a certain pressure.
By controlling the relation of the compression amount Δh1 of the spacer 8, the compression amount Δh2 of the non-rectangular coating 7, the thickness H1 of the spacer 8, and the thickness H2 of the non-rectangular coating 7, it is satisfied that: ΔH2+ (H1-H2) such that when the non-rectangular coating 7 is compressed to a target thickness, the gasket 8 still has a compression margin, thereby reducing the compression effect of the gasket 8 on the non-rectangular coating 7.
Further, the relationship of the compression amount Δh1 of the gasket 8, the compression amount Δh2 of the non-rectangular coating 7, the thickness H1 of the gasket 8, and the thickness H2 of the non-rectangular coating 7 satisfies: Δh1=Δh2+ (h1—h2) +2μm.
In some embodiments, the outer contour of the spacer 8 is rectangular, and the spacer 8 is provided with a receiving cavity 81 for receiving the non-rectangular coating 7. The gasket 8 with the rectangular outer contour can enable the contact area between the gasket 8 and the to-be-pressed component formed by the non-rectangular coating 7 and the pressing roller 411 to be unchanged when the to-be-pressed component passes through the pressing roller 411, and can further improve the consistency of products when the non-rectangular coating 7 is transferred by adopting rolling transfer printing.
In some embodiments, as shown in fig. 4 to 6, the shape of the receiving cavity 81 matches the shape of the non-rectangular coating 7; matching means that the shape of the receiving cavity 81 is the same as the shape of the non-rectangular coating 7, e.g. the shape of the non-rectangular coating 7 is circular, the shape of the receiving cavity 81 is also circular. By matching the shape of the receiving cavity 81 with the shape of the non-rectangular coating 7, it is easier to achieve a substantially constant relative position of the gasket 8 and the non-rectangular coating 7 when they are placed, thereby improving the consistency between the final products. It will be appreciated by those skilled in the art that in other embodiments, as shown in fig. 7, the shape of the receiving cavity 81 may not match the shape of the non-rectangular coating 7.
In some embodiments, the receiving cavity 81 may be through-going.
Further, the cross-sectional area of the receiving cavity 81 is larger than the cross-sectional area of the non-rectangular coating 7 to facilitate placement of the non-rectangular coating 7. The cross-sectional area of the accommodating cavity 81 is larger than that of the non-rectangular coating 7, which means that when the non-rectangular coating 7 is placed in the accommodating cavity 81 and the central axes of the non-rectangular coating 7 and the non-rectangular coating are coincident, a gap exists between the edge of the non-rectangular coating 7 and the edge of the accommodating cavity 81. By making the cross-sectional area of the accommodating chamber 81 larger than that of the non-rectangular coating 7, the convenience of placing the non-rectangular coating 7 in the accommodating chamber 81 is effectively increased.
In some embodiments, the thickness of the coating body 72 in the non-rectangular coating 7 is 10-50 μm, and exemplary, the thickness of the coating body 72 in the non-rectangular coating 7 may be 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, etc., which may also be any value in the range of 10-50 μm; the thickness of the transfer substrate 71 in the non-rectangular coating 7 is 100 to 150 μm, and the thickness of the transfer substrate 71 in the non-rectangular coating 7 may be 100 μm, 105 μm, 110 μm, 115 μm, 120 μm, 125 μm, 130 μm, 135 μm, 140 μm, 145 μm, 150 μm, etc., and may be any value within the range of 100 to 150 μm. It should be noted that the thicknesses of the transfer substrate 71 and the coating body 72 are limited to 100-150 μm and 10-50 μm, respectively, and are only for illustrating some modes that the present application can be implemented (for example, the preparation of a fuel cell membrane electrode is implemented), and are not limited to the present application, and in other embodiments, those skilled in the art can select the transfer substrate 71 and the coating body 72 with corresponding thicknesses according to actual needs.
In some embodiments, the length of the shim 8 is greater than the length of the non-rectangular coating 7 in the roll direction of the roll transfer.
And S3, rolling the non-rectangular coating 7 and the gasket 8 in the to-be-pressed assembly at the same time to finish rolling transfer printing of the coating body 72.
Based on the same inventive concept, as shown in fig. 3, an embodiment of the present application further provides a transfer printing system of a non-rectangular coating 7, the system comprising: a substrate layer supply unit 1 for providing a substrate layer 9, a gasket supply unit 2 for providing a gasket 8 on the substrate layer 9, a non-rectangular coating supply unit 3 for placing a non-rectangular coating 7 on the substrate layer 9 so that the gasket 8 and the non-rectangular coating 7 are combined to obtain a component to be pressed, and a roll transfer unit 4 for simultaneously roll-pressing the non-rectangular coating 7 and the gasket 8 in the component to be pressed to complete roll-transfer of the coating body 72, the roll transfer unit 4 communicating the substrate layer supply unit 1, the gasket supply unit 2 and the non-rectangular coating supply unit 3 to receive the substrate layer 9, the gasket 8 and the non-rectangular coating 7.
In some embodiments, the roll transfer unit 4 includes a roll assembly 41, and the roll assembly 41 may include one or more pairs of roll sets.
In some embodiments, the substrate layer supply unit 1 includes a substrate layer discharging roller 11 and a product receiving roller 12, the strip of the substrate layer 9 is wound around the substrate layer discharging roller 11 and the product receiving roller 12 and is transported therebetween by rotation of the two, and the strip of the substrate layer 9 is passed through the roll transfer unit 4, that is, between the roller sets.
In some embodiments, the pad providing unit 2 includes a pad discharging roller 21 and a pad collecting roller 22, the strip of the pad 8 is wound around and transferred between the pad discharging roller 21 and the pad collecting roller 22 by rotation of both, and the strip of the pad 8 is passed through the roll transfer unit 4, that is, between the roller groups. The gasket 8 may be provided with a receiving cavity 81 matched with the non-rectangular coating 7 in advance, or the receiving cavity 81 may be temporarily prepared during the transfer of the gasket feed roller 21 and the gasket take-up roller 22. To achieve temporary preparation of the receiving cavity 81 during transport of the pad discharging roller 21 and the pad receiving roller 22, in some embodiments the system further comprises a receiving cavity preparation unit 5, the receiving cavity preparation unit 5 being arranged between the pad discharging roller 21 and the roll transfer unit 4. Specifically, the accommodating cavity preparation unit 5 may be a circular cutter machine cutting die.
In some embodiments, the non-rectangular coating providing unit 3 may be a robot with suction cups. Which is able to pick up the non-rectangular coating 7 and place it accurately in the housing cavity 81 of the spacer 8.
In some embodiments, the roll-in transfer unit 4 further includes a receiving conveyor belt assembly 42, the receiving conveyor belt assembly 42 includes a conveyor roller set 421 and a conveyor belt body 422, the conveyor belt body 422 is wound between the conveyor roller set 421, and the conveyor belt body 422 is disposed through the roll-in transfer unit 4, i.e., between the roller sets.
In some embodiments, the roll transfer unit 4 further includes a direction-changing roller set 43, where the direction-changing roller set 43 includes a first direction-changing roller 431 and a second direction-changing roller 432, and the first direction-changing roller 431 and the second direction-changing roller 432 are respectively disposed on two sides of the roll assembly 41 along the conveying direction, so that the strip of the substrate layer 9 and the strip of the spacer 8 form a horizontal segment on the conveying belt body 422.
To achieve separation of the transfer substrate 71 and the coating body 72 after roll transfer is complete, in some embodiments the system further comprises a separation unit 6, the separation unit 6 being arranged between the roll assembly 41 and the product receiving roll 12. Specifically, the separation unit 6 may be an electrostatic separation component, where the electrostatic separation component includes an electrostatic film discharging roller, an electrostatic film collecting roller, and an electrostatic film, and the electrostatic film is wound around the electrostatic film discharging roller and the electrostatic film collecting roller, and at least a portion of the electrostatic film is in contact with the strip material of the base layer 9.
The application will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present application and are not intended to limit the scope of the present application. The experimental procedures, which are not specified in the following examples, are generally determined according to national standards. If the corresponding national standard does not exist, the method is carried out according to the general international standard, the conventional condition or the condition recommended by the manufacturer.
Example 1
In the embodiment, the gasket with the rectangular outer contour and the matched accommodating cavity and the non-rectangular coating is adopted, the pressure sensitive paper replaces the coating body (the catalytic layer) of the non-rectangular coating, and the pressure sensitive paper and the transfer film are sequentially placed into the accommodating cavity of the gasket and then pass through the roller to see the color developing consistency after being pressed. The relevant parameters are as follows:
transfer film thickness 100 μm, regular triangle with side length 100mm
The thickness of the pressure sensitive paper is 150 mu m, and the side length of the pressure sensitive paper is 100mm in a regular triangle shape
The thickness of the gasket (strip) is 252-255 mu m, the outer contour width is 150mm, and the accommodating cavity is a regular triangle with a side length of 102mm
Comparative example 1
In the comparative example, a gasket is not used, the pressure-sensitive paper replaces a coating body (a catalytic layer) of a non-rectangular coating, and the pressure-sensitive paper and a transfer film are directly passed through a roller to see the color development consistency after being pressed. The relevant parameters are as follows:
transfer film thickness 100 μm, regular triangle with side length 100mm
The thickness of the pressure sensitive paper is 150 mu m, and the side length of the pressure sensitive paper is 100mm in a regular triangle shape
Comparative example 1 the same pressure was used as in example 1, and the corresponding color development after passing through the rolls is shown in FIG. 10, wherein the left side is the color development result of example 1, and the right side is the color development result of comparative example 1. As can be seen from the graph, the color development of the pressure-sensitive paper in comparative example 1 is increased as the pressure receiving area is reduced, which indicates that the pressure applied to the pressure-sensitive paper is increased as the pressure receiving area is reduced. The pressure sensitive paper in example 1 showed no significant difference in color development, indicating that the pressure applied to the pressure sensitive paper was substantially uniform. From the comparison, the gasket with the rectangular outer contour and the matched shape of the containing cavity and the non-rectangular coating can reduce the pressure difference born by the coating body when passing through the press roller.
Example 2
In this embodiment, a first gasket (fig. 4) with a rectangular outer contour and a non-rectangular coating matching the accommodating cavity is adopted, a second gasket (fig. 7) with a rectangular outer contour and a non-rectangular coating matching the accommodating cavity is adopted, a round catalyst coating and a transfer printing film are used for transfer printing, and the consistency of the thickness of the proton film and the catalyst coating after transfer printing is measured. The relevant parameters are as follows:
a transfer film thickness of 100 μm, a coating thickness of 20 μm, a circular catalyst coating layer with a diameter of 100 mm+the transfer film;
proton membrane (strip) thickness 15 μm, width 150mm;
the thickness of the first gasket (strip) is 122-125 mu m, the outer contour width is 150mm, and the accommodating cavity is a circle with the diameter of 102mm (as shown in figure 1);
the thickness of the second gasket (strip) is 122-125 μm, the outer contour is 150mm wide, the distance between the parallel sides of the accommodating cavity is 100mm, and the maximum distance between the two arc sides is 120mm (as shown in figure 7).
Comparative example 2
Comparative example the consistency of proton membrane + catalyst coating thickness after transfer was measured using a round catalyst coating + transfer membrane transfer without shims. The relevant parameters are as follows:
a transfer film thickness of 100 μm, a coating thickness of 20 μm, a circular catalyst coating layer with a diameter of 100 mm+the transfer film;
the proton membrane (strip) had a thickness of 15 μm and a width of 150mm.
Comparative example 2 the average thickness of the proton membrane + catalyst coating perpendicular to the feed roll direction was measured at 5mm intervals using the same pressure as in example 2, the roll-in process was as shown in fig. 11, the thickness measurement data was as shown in fig. 12, and it can be seen from the graph that the fluctuation range of the proton membrane + catalyst coating thickness after the transfer of comparative example 2 was about 3 μm, the fluctuation range of the proton membrane + catalyst coating thickness after the transfer of example 2 using the first spacer was about 1 μm, the fluctuation range of the proton membrane + catalyst coating thickness after the transfer of example 2 using the second spacer was about 1.5 μm, and the fluctuation of the proton membrane + catalyst coating thickness in example 2 was significantly reduced. From the comparison, the thickness consistency of the non-rectangular coating after transfer can be effectively improved by adopting the gasket in the embodiment of the application.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of transferring a non-rectangular coating, the method comprising:
obtaining a non-rectangular coating, wherein the non-rectangular coating comprises a transfer printing substrate and a coating body attached to the transfer printing substrate, and the contact area of the coating body and a press roller is different when the coating body passes through the press roller of the roll transfer printing along the roll transfer printing direction;
providing a gasket on a substrate layer, and placing the non-rectangular coating on the substrate layer, so that the gasket and the non-rectangular coating are combined to obtain a component to be pressed to reduce the pressure difference born by the coating body when passing through the press roller;
and simultaneously rolling the non-rectangular coating and the gasket in the to-be-pressed assembly to finish rolling transfer printing of the coating body.
2. The transfer printing method of a non-rectangular coating according to claim 1, wherein the maximum contact area S of the coating body with the press roller is as it passes through the press roller Maximum 1 Minimum contact area S of the coating body and the press roller Very small 1 Maximum contact area S of the component to be pressed and the press roller Maximum 2 And the component to be pressedMinimum contact area S with the press roller Very small 2 The following relationship is satisfied: s is S Maximum 2 -S Very small 2 ＜S Maximum 1 -S Very small 1 。
3. The transfer printing method of a non-rectangular coating according to claim 1 or 2, wherein the thickness H1 of the spacer is not less than the thickness H2 of the non-rectangular coating.
4. The transfer printing method of a non-rectangular coating according to claim 3, wherein the relationship between the thickness H1 of the spacer and the thickness H2 of the non-rectangular coating satisfies: h1—h2=2 to 5 μm.
5. The transfer printing method of a non-rectangular coating according to claim 1 or 2, wherein the relationship of the compression amount Δh1 of the spacer, the compression amount Δh2 of the non-rectangular coating, the thickness H1 of the spacer, and the thickness H2 of the non-rectangular coating satisfies: ΔH2+ (H1-H2) with ΔH2.
6. The transfer printing method of a non-rectangular coating according to claim 5, wherein the relationship of the compression amount Δh1 of the spacer, the compression amount Δh2 of the non-rectangular coating, the thickness H1 of the spacer, and the thickness H2 of the non-rectangular coating satisfies: Δh1=Δh2+ (h1—h2) +2μm.
7. The transfer printing method of a non-rectangular coating according to claim 1 or 2, wherein the outer contour of the spacer is rectangular, and the spacer is provided with a receiving cavity for receiving the non-rectangular coating.
8. The transfer printing method of a non-rectangular coating according to claim 7, wherein the shape of the accommodating chamber and the shape of the non-rectangular coating match; and/or
The cross-sectional area of the accommodating cavity is larger than that of the non-rectangular coating so as to facilitate placement of the non-rectangular coating.
9. The transfer printing method of a non-rectangular coating according to claim 1 or 2, wherein the thickness of the transfer printing substrate in the non-rectangular coating is 100-150 μm; and/or
The thickness of the coating body in the non-rectangular coating is 10-50 mu m.
10. A transfer system for a non-rectangular coating, the system comprising:
a base layer supply unit for providing a base layer;
a spacer providing unit for providing a spacer on the base layer;
a non-rectangular coating providing unit for placing a non-rectangular coating on the base layer so that the gasket and the non-rectangular coating are combined to obtain a component to be pressed, wherein the non-rectangular coating comprises a transfer printing base material and a coating body attached to the transfer printing base material, and the contact area of the coating body and a pressing roller is different when passing through the pressing roller of the rolling transfer printing along the rolling transfer printing direction; and
the rolling transfer printing unit is used for simultaneously rolling the non-rectangular coating and the gasket in the component to be pressed so as to finish rolling transfer printing of the coating body; the roll transfer unit communicates with the base layer supply unit, the spacer supply unit, and the non-rectangular coating supply unit to receive the base layer, the spacer, and the non-rectangular coating.
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| JP2010217337A (en) * | 2009-03-13 | 2010-09-30 | Ricoh Co Ltd | Transfer device and image forming apparatus |
| CN201633971U (en) * | 2010-01-15 | 2010-11-17 | 锴兴工业股份有限公司 | Hot-press laminator for heat-transfer printing machine |
| CN111883786A (en) * | 2020-08-31 | 2020-11-03 | 上海亿氢科技有限公司 | Device and method for preparing membrane electrode CCM (continuous charge coupled device) by pattern format continuous transfer printing |
| CN218827247U (en) * | 2022-08-31 | 2023-04-07 | 江苏氢导智能装备有限公司 | CCM transfer apparatus |
| CN219544314U (en) * | 2023-05-09 | 2023-08-18 | 厦门凡尔赛科技有限公司 | Printer convenient to uncap easy operation |
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| JP2010217337A (en) * | 2009-03-13 | 2010-09-30 | Ricoh Co Ltd | Transfer device and image forming apparatus |
| CN201633971U (en) * | 2010-01-15 | 2010-11-17 | 锴兴工业股份有限公司 | Hot-press laminator for heat-transfer printing machine |
| CN111883786A (en) * | 2020-08-31 | 2020-11-03 | 上海亿氢科技有限公司 | Device and method for preparing membrane electrode CCM (continuous charge coupled device) by pattern format continuous transfer printing |
| CN218827247U (en) * | 2022-08-31 | 2023-04-07 | 江苏氢导智能装备有限公司 | CCM transfer apparatus |
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