JP5054957B2 - Printing plate unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing plate unit which can reuse a frame more simply than a prior art without giving stress by a metallic sound to a worker. <P>SOLUTION: In the printing plate unit 1 having a plastic mask 3 with a printing pattern formed from a plurality of through-holes in a plastic sheet and a frame 2 made of metal adhered to the peripheral edge of this plastic mask 3; an element, which covers the front surface of a metallic base 2a with a front surface resin layer 2b is used as the frame 2, and an adhesive 10 for adhering the plastic mask 3 to this frame 2 is interposed between the front surface resin layer 2b of the frame 2 and the plastic mask 3. In such a constitution, the adhesive 10 can be simply peeled off from the front surface resin layer 2b by advancing a scraper between the front surface resin layer 2b and the adhesive 10 with relatively weak force. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention is a printing plate having a printing plate in which a printing pattern composed of a plurality of through holes, a plurality of recesses, or a combination thereof is formed on a sheet-like resin base material, and a frame bonded to the peripheral edge portion of the printing plate It relates to the version unit.

  Conventionally, a printing method using a printing plate in which a printing pattern including a plurality of through holes and concave portions is formed on a sheet-like resin base material has been used in various fields. In recent years when the fine pitch of the printing pattern is advanced, the thickness of the printing plate in such a printing method has been considerably reduced. For example, in the field of electronic circuits, cream solder is printed on each of a plurality of fine electrode pads on an electronic circuit board using a printing mask as a printing plate, and the pitch of the printed pattern is only a few tens. It is getting smaller to about μm. In order to enable printing with such a fine pitch, it is necessary to suppress the thickness of the printing mask to about several tens of μm. And since such a thin printing plate is very weak and bends immediately, it is not easy to handle as it is. For this reason, for example, as described in Patent Document 1, the peripheral portion of the printing plate is bonded to a metal frame while tension is applied to the thin printing plate, and the printing plate is combined with the frame. In general, it is handled in the state of the printing plate unit. By doing so, the thin printing plate can be handled in a flat state without being bent.

  A printing plate unit having such a configuration is discarded when printing by the printing plate becomes unnecessary or when the printing plate reaches the end of its life due to wear or the like, but the metal frame can be reused. is there. Therefore, the present applicant has conventionally attempted to reduce costs and effectively use resources by reusing the metal frame after the printing plate is peeled off to a new printing plate unit.

JP-A-9-232720

  However, in order to reuse the frame after peeling off the printing plate, it is necessary to clean it cleanly, but the cleaning work becomes very complicated and stresses the operator. It was causing problems. Specifically, a conventional printing plate unit has a configuration in which a resin printing plate is bonded to a metal frame with an adhesive, but in general, an adhesive is better for a metal than a resin. Exhibits adhesiveness. For this reason, when the printing plate is peeled off from the frame, almost the entire amount of the adhesive remains on the metal frame. In order to reuse the frame body, it is necessary to perform a cleaning work by scraping and removing the adhesive that is strongly bonded to the frame body with a metal scraper. It was. Further, during the cleaning operation, a high metal sound generated by rubbing between the metal frame and the metal scraper has given considerable stress to the operator. Even if the frame is made of plastic, a high rubbing noise may be generated when it is rubbed against the scraper.

  The present invention has been made in view of the above background. The object of the present invention is to reduce the stress on the operator due to high noise caused by the friction with the scraper, and to re-seal the frame more easily than before. It is to provide a printing plate unit that can be used.

In order to achieve the above object, the invention of claim 1 includes a printing plate in which a printing pattern comprising a plurality of through-holes, a plurality of recesses, or a combination thereof is formed on a sheet-like resin base material, and the periphery thereof In the printing plate unit having a frame bonded to the part, the frame is a metal base coated with a resin surface layer, or a non-metal base having a smaller frictional resistance than the base. A surface layer made of a material is used, and an adhesive for adhering the printing plate to the frame is interposed between the surface layer of the frame and the printing plate , and the surface The contact area between the layer and the adhesive is smaller than the contact area between the printing plate and the adhesive .
Also, the invention of claim 2, a plurality of through-holes in the sheet-like resin substrate, a printing plate having a plurality of recesses, or printed pattern consisting of combinations have been formed, is bonded to the peripheral portion of this In a printing plate unit having a frame, as the frame, a metal base coated with a resin surface layer, or a non-metal base made of a material having a lower frictional resistance than the base used as coated with the adhesive for bonding the printing plate frame body, it is interposed between the surface layer and the printing plate of the frame body, and one of the surface of the surface layer and part regions, is characterized in that is interposed lubricant promoter between the adhesive.
According to a third aspect of the present invention, there is provided a printing plate in which a printing pattern comprising a plurality of through-holes, a plurality of recesses, or a combination thereof is formed on a sheet-like resin base material, and a frame adhered to the peripheral portion thereof In the printing plate unit having a body, as the frame body, a metal base coated with a resin surface layer, or a non-metal base made of a material having a lower frictional resistance than the base used after coating, an adhesive for bonding the printing plate frame body, is interposed between the surface layer and the printing plate of the frame body, and, as the printing plate, at least the adhesive contact surface with the agent is characterized in that using a made of a material which exhibits a greater adhesion force than the surface layer of the frame relative to the adhesive.

  In these inventions, when the resin-made printing plate is peeled from the frame, the adhesive layer interposed between the surface layer of the frame and the printing plate is removed from the surface layer of the frame together with the printing plate. Either stripped or left on the surface layer. When it is peeled off together with the printing plate, no cleaning work is required to peel off the adhesive from the frame, so that the operator is stressed by the high noise caused by the friction between the scraper and the frame. The frame can be reused more easily than before without causing a situation. Even when the adhesive remains on the surface layer of the frame, the adhesive adheres to the surface layer with an adhesive force weaker than the adhesive force to the substrate. For this reason, it is possible to easily peel off the adhesive from the surface layer by causing the scraper to enter between the surface layer and the adhesive with a weaker force than before. In such a cleaning operation (peeling operation), the metal scraper is not rubbed against the metallic or non-metallic substrate of the frame. In the case where a metal frame is used, it is possible to avoid generation of a high-pitched metal sound caused by sliding the scraper against the metal frame. In addition, when a non-metallic frame is used, the scraper is rubbed against a surface layer having a lower frictional resistance than the frame without rubbing the frame and the scraper. The accompanying high noise can be reduced. Therefore, when the adhesive is peeled off from the frame together with the printing plate, or remains on the surface layer, the frame is removed while reducing the stress on the operator due to high noise. It can be reused more easily than before.

In particular, in the first aspect of the invention, the adhesive is more easily peeled from the surface layer than when the contact area between the surface layer of the frame and the adhesive is made equal to the contact area between the printing plate and the adhesive. . Thereby, when peeling a printing plate from a frame, it is easy to peel an adhesive from a surface layer with a printing plate, and the work amount for removing an adhesive from a surface layer can be reduced.

In particular, in the second aspect of the present invention, the adhesive is easily peeled off from the surface layer by a lubrication accelerator interposed between a partial region of the surface of the surface layer in the frame and the adhesive. Thereby, when peeling a printing plate from a frame, it is easy to peel an adhesive from a surface layer with a printing plate, and the work amount for removing an adhesive from a surface layer can be reduced.

In particular, in the invention of claim 3 , when the resin printing plate is peeled off from the frame, the adhesive interposed between the surface layer of the frame and the printing plate is used together with the printing plate. It becomes possible to peel off from the surface layer of the body. And thereby, the cleaning operation for stripping off the adhesive from the frame body becomes unnecessary, and the frame body can be reused more easily.

  Hereinafter, an embodiment of a printing mask unit for printing a pattern made of cream solder as a printing material on an electronic circuit board as a printing plate unit to which the present invention is applied will be described.

First, a common configuration common to print mask units according to first, second, and third embodiments (hereinafter collectively referred to as each embodiment) described below will be described. FIG. 1 is a perspective view showing a frame 2 that is a component of a print mask unit according to each embodiment. FIG. 2 is a cross-sectional view showing the frame 2. In FIG. 2, the frame 2 has a metal substrate 2a and a resin surface layer 2b coated on the surface thereof. As shown in FIG. 1, the metal substrate 2 a is formed by welding four metal square pipes (for example, aluminum square pipes) in a rectangular shape. The resin surface layer 2b shown in FIG. 2 is coated with a uniform thickness on the rectangular surface of the metal substrate 2a. As the resin material of the resin surface layer 2b, a known plastic material such as polyester, epoxy, polycarbonate, polyethylene, polyethylene terephthalate (PET), polypropylene, polyacetal, Teflon (registered trademark), polyphenylene sulfide (PPS), or the like should be used. Can do. The plastic material is fixed on the surface of the metal substrate 2a by a known vapor deposition method or welding method to form the resin surface layer 2b.

In order to manufacture the printing mask unit according to each embodiment, first, as shown in FIG. 3, the adhesive 10 is applied on the resin surface layer 2b of the frame 2 shown in FIG. Any adhesive can be used as long as it can adhere a plastic material satisfactorily. For example, Super X8008 (trade name) manufactured by Cementine Co., Epoxy # 1500 (trade name) manufactured by Cementine Co., etc. can be exemplified.

  When the adhesive 10 is applied on the resin surface layer 2b of the frame 2, a plastic mask 3 serving as a printing plate is stretched over the frame 2 as shown in FIG. The plastic mask 3 is obtained by forming a printing pattern 3a composed of a plurality of through holes on a plastic sheet as a sheet-like resin base material. Each through hole of the printing pattern 3a is formed by ablation processing by excimer laser irradiation. Each through hole may be ablated by irradiation with a femtosecond laser. The plastic sheet is a film having a thickness of about 75 [μm], and examples of the material thereof include polyester, epoxy, polycarbonate, polyethylene, PET, polypropylene, polyacetal, Teflon (registered trademark), and PPS.

  As shown in FIG. 5, the plastic mask 3 having such a configuration is pressed against the frame body 2 while being pulled in the surface direction by a known tensioner. This state is maintained until the adhesive (10) is solidified. When the adhesive (10) is solidified, the portion of the plastic mask 3 protruding from the frame 2 is cut out with a cutter knife or the like. Thereby, as shown in FIG. 6, the printing mask unit 1 which is a printing plate unit in which the rectangular frame 2 is bonded to the peripheral edge of the plastic mask 3 is obtained. In FIG. 6, the printing pattern (3a) in the plastic mask 3 is not shown for convenience.

  The printing mask unit 1 manufactured in this way is discarded when printing by it becomes unnecessary or when the plastic mask 3 reaches the end of its life due to wear or the like. It can be used. The process until the frame 2 is reused includes a peeling process for peeling the plastic mask 3 from the frame 2, a cleaning process for removing the adhesive adhering to the surface of the frame 2 from the frame 2, and It is roughly divided into an attaching process for attaching a new plastic mask 3 to the frame 2 after cleaning. In the attaching process, as described above, the plastic mask 3 is adhered to the frame 2 while being stretched by a tensioner, and thereafter, the portion protruding from the frame 2 of the plastic mask 3 when the adhesive is solidified. Cutting is done.

  In the peeling process, first, as shown in FIG. 7, a cross-shaped cut is made by a cutter knife or the like around the center of the plastic mask 3 of the printing mask unit 1. Next, as shown in FIG. 8, the plastic mask 3 is turned up at the portion of the cut and is gradually peeled off from the frame 2 while gradually widening the cut. Immediately before the peeling is performed, as shown in FIG. 6, the adhesive 10 for bonding the plastic mask 3 to the frame 2 is applied between the resin surface layer 2 b of the frame 2 and the plastic mask 3. Is intervening. When the peeling is performed, the adhesive 10 is peeled off from the resin surface layer 2b of the frame 2 together with the plastic mask 3 as shown in FIG. 9, or the resin surface layer 2b as shown in FIG. Do you want to remain on top? In many cases, a part of the adhesive 10 is peeled off from the resin surface layer 2b together with the plastic mask 3 as shown in FIG. 9, and the rest is left on the resin surface layer 2b as shown in FIG.

  By the way, in the conventional printing mask unit, since the surface resin layer was not provided on the surface of the frame, when the plastic mask was peeled off from the frame, almost the entire amount of the adhesive was left on the surface of the frame. It was. This is because, in general, an adhesive exhibits a stronger adhesion to a metal than a resin. The adhesive that is firmly attached to the metal frame cannot be removed by chemical treatment and will be peeled off from the frame with a scraper. While pressing against the frame, it was necessary to sink between the adhesive and the frame. And the high metal sound by the rubbing of a scraper and a frame was generated, and the worker was stressed.

On the other hand, in the printing mask unit 1 according to each embodiment, even when the adhesive 10 is left on the frame 2 when the plastic mask 3 is peeled off from the frame 2, as shown in FIG. Is present on the resin surface layer 2b, not on the metal base 2a of the frame 2. The adhesive 10 is attached to the resin surface layer 2b with an adhesive force weaker than the adhesive force to the metal substrate 2a. For this reason, in the cleaning step, as shown in FIG. 11, the metal scraper 11 is made to enter between the resin surface layer 2b and the adhesive 10 with a weaker force than before, so that the adhesive 10 is made of resin. It can be easily peeled off from the surface layer 2b. In the stripping operation, the metal scraper 11 is not rubbed against the metal base 2a of the frame body 2, so that a situation in which the operator is stressed by a high metal sound is not caused. Therefore, the frame 2 can be reused more easily than before without giving stress due to the metal sound to the operator.

Next, the print mask unit of each embodiment in which a more characteristic configuration is added to the common configuration described so far will be described.
[First Embodiment ]
Printing mask unit according to the first embodiment, the contact area between the adhesive 10 and the resin surface layer 2b of the frame 2 is made smaller than the contact area between the adhesive 10 and the plastic mask 3. As a method of satisfying such a configuration, a method of interposing a masking material between a partial region on the surface of the resin surface layer 2 b and the adhesive 10 can be mentioned. For example, FIG. 12 is an enlarged sectional view showing a part of the printing mask unit 1A having such a configuration. In the figure, a masking tape 12 as a masking material is applied to the surface of the resin surface layer 2 b of the frame 2, and the masking tape is provided between the tape application location of the resin surface layer 2 b and the adhesive 10. 12 is interposed. And by this interposition, a partial region on the surface of the resin surface layer 2 b is prevented from contacting the adhesive 10. At this time, by making the layer thickness of the adhesive 10 larger than the thickness of the masking tape 12 as shown in the figure, the adhesive 10 is always interposed between the masking tape 12 and the plastic mask 3. To do. By doing in this way, the contact area of the resin surface layer 2b and the adhesive 10 can be made smaller than the contact area of the plastic mask 3 and the adhesive 10. In such a configuration, the adhesive 10 can be easily peeled off from the resin surface layer 2b as compared with the case where the contact areas of both are equal. Thereby, when the plastic mask 3 is peeled off from the frame body 2, the adhesive 10 is easily peeled off from the resin surface layer 2 b together with the plastic mask 3. And the adhesive residual amount on the resin surface layer 2b can be reduced, and the work amount for removing the adhesive 10 from the frame 2 can be reduced.

  As a method of reducing the contact area between the resin surface layer 2b and the adhesive 10 to be smaller than the contact area between the plastic mask 3 and the adhesive 10, the contact surface with the adhesive 10 as the plastic mask 3 is the resin surface layer 2b. A method using a material rougher than the surface may be employed. Even if the opposing areas of the plastic mask 3 and the frame 2 are the same, the surface of the plastic mask 3 is rougher than the resin surface layer 2b of the frame 2, so that the resin surface layer 2b is more adhesive than the plastic mask 3. The contact area with 10 is reduced. Even in such a configuration, when the plastic mask 3 is peeled off from the frame body 2, the adhesive 10 can be easily peeled off from the resin surface layer 2 b together with the plastic mask 3. In addition, after peeling off the plastic mask 3 from the frame 2, the masking tape 12 and the adhesive 10 thereon may be left on the resin surface layer 2b of the frame 2, but these are the masking tape. By removing 12, the frame 2 can be easily removed.

  In order to make the contact area between the resin surface layer 2b and the adhesive 10 smaller than the contact area between the plastic mask 3 and the adhesive 10, a configuration as shown in FIG. In the figure, the frame 2 is a substance in which the resin surface layer 2b is coated only on a partial region of the surface of the metal substrate 2a and exhibits a smaller adhesive force to the adhesive 10 than the resin surface layer 2b. The low adhesion material surface layer 2c made of is coated in another region. Examples of the material of the low adhesion material surface layer 2 c, that is, a substance that exhibits a smaller adhesion force to the adhesive 10 than the resin surface layer 2 b include gypsum. Even in such a configuration, when the plastic mask 3 is peeled off from the frame body 2, the adhesive 10 can be easily peeled off from the resin surface layer 2 b together with the plastic mask 3. In addition, after peeling off the plastic mask 3 from the frame 2, it is possible that the low adhesion material surface layer 2c is left on the metal base 2a of the frame 2. Can be easily removed from the metal substrate 2a.

[Second Embodiment ]
Figure 14 is an enlarged cross-sectional view of a portion of the printing mask unit 1B according to the second embodiment. In this print mask unit 1B, oil 13 as a lubricant accelerator is applied to a partial region on the surface of the resin surface layer 2b of the frame 2. The oil is interposed between the oil application amount region on the surface of the resin surface layer 2 b and the adhesive 10. Since the oil 13 has a very small adhesive force with the adhesive 10, when the plastic mask 3 is peeled off from the frame 2, the oil 10 is easily peeled off from the resin surface layer 2 b together with the plastic mask 3. Thereby, the work amount for removing the adhesive agent 10 from the resin surface layer 2b can be reduced. In place of the oil 13, a water repellent or the like may be used as a lubricant accelerator.

[Third Embodiment ]
Printing mask unit according to the third embodiment, as a plastic mask 3, the contact surface of at least the adhesive 10, with a made of a material which exhibits a greater adhesion force than the resin surface layer 2b with respect to the adhesive ing. As such a material, a material in which a metal powder is dispersed in a resin can be exemplified. This is because the adhesive force with the adhesive can be increased by dispersing the metal powder exhibiting a good adhesive force with respect to the adhesive in the resin. When the plastic mask 3 made of such a material is used, the adhesive 10 that is interposed between the resin surface layer 2b of the frame 2 and the plastic mask 3 when the plastic mask 3 is peeled off from the frame 2 is used. Can be peeled off together with the plastic mask 3 from the resin surface layer 2b. And thereby, the cleaning operation for peeling off the adhesive 10 from the frame body 2 becomes unnecessary, and the frame body 2 can be reused more easily.

  As described above, the example using the plastic mask 3 in which the printing pattern composed of a plurality of through holes is formed on the plastic sheet has been described as the printing plate. The present invention can be applied to a printing plate unit.

  Moreover, although the example which coat | covered the resin surface layer 2b on the metal base | substrate 2a was demonstrated, you may coat | cover the surface layer which consists of material with smaller frictional resistance on the nonmetallic base | substrate.

  Moreover, although the example which adhere | attaches the plastic mask 3 in which the printing pattern 3a was formed to the frame 2 was demonstrated, after bonding a plastic sheet to the frame 2, the printing pattern by laser processing may be formed in the plastic sheet Good.

The perspective view which shows the frame used as the component of the printing mask unit which concerns on each embodiment. Sectional drawing which shows the frame. Sectional drawing which shows the same frame body which apply | coated the adhesive agent on the surface. The perspective view which shows a plastic mask and the frame. The perspective view which shows the state which has adhere | attached the plastic mask to the frame. Sectional drawing which shows the printing mask unit. The perspective view which shows the same printing mask unit which put the cross-shaped cut | notch in the plastic mask. The perspective view which shows the same printing mask unit in the peeling process. Sectional drawing which shows the printing mask unit of the state from which the adhesive agent was peeled off from the frame body with the plastic mask at the peeling process. Sectional drawing which shows the same printing mask unit of the state in which the adhesive agent was left on the resin surface layer of a frame at the peeling process. Sectional drawing which shows the printing mask unit in the middle of the adhesive agent left on the surface resin layer being peeled by the scraper. Enlarged cross-sectional view showing an example of a print mask unit according to the first embodiment. Enlarged cross-sectional view showing another example of a printing mask according to the first embodiment. Enlarged cross-sectional view showing a printing mask according to the second embodiment.

Explanation of symbols

1: Printing plate unit 1A: Printing plate unit 1B: Printing plate unit 2: Frame 2a: Metal substrate 2b: Resin surface layer 3: Plastic mask (printing plate)
3a: Print pattern 10: Adhesive 12: Masking tape (masking material)
13: Oil

Claims (3)

In a printing plate unit having a printing plate in which a printing pattern composed of a plurality of through holes, a plurality of recesses, or a combination thereof is formed on a sheet-like resin base material, and a frame bonded to the peripheral edge thereof,
As the frame, a metal base coated with a resin surface layer, or a non-metal base coated with a surface layer made of a material having a smaller frictional resistance than the base is used. An adhesive for adhering the printing plate is interposed between the surface layer of the frame and the printing plate ,
A printing plate unit , wherein a contact area between the surface layer and the adhesive is smaller than a contact area between the printing plate and the adhesive . In a printing plate unit having a printing plate in which a printing pattern composed of a plurality of through holes, a plurality of recesses, or a combination thereof is formed on a sheet-like resin base material, and a frame bonded to the peripheral edge thereof,
As the frame, a metal base coated with a resin surface layer, or a non-metal base coated with a surface layer made of a material having a smaller frictional resistance than the base is used. An adhesive for adhering the printing plate is interposed between the surface layer of the frame and the printing plate,
And, printing units, wherein the partial region of the surface of the surface layer, that is interposed lubricant promoter between the adhesive. In a printing plate unit having a printing plate in which a printing pattern composed of a plurality of through holes, a plurality of recesses, or a combination thereof is formed on a sheet-like resin base material, and a frame bonded to the peripheral edge thereof,
As the frame, a metal base coated with a resin surface layer, or a non-metal base coated with a surface layer made of a material having a smaller frictional resistance than the base is used. An adhesive for adhering the printing plate is interposed between the surface layer of the frame and the printing plate,
And, printing as the printing plate, the contact surface with at least said adhesive, characterized by using a made of a material which exhibits a greater adhesion force than the surface layer of the frame relative to adhesive Edition unit.

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