JP2009220562A - Apparatus and method for manufacturing microscopic transfer sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for manufacturing a microscopic transfer sheet which can transfer and form the minute shape on a sheet-like substrate without causing transfer irregularity, and can restore the reduced thickness of a buffer material nearly to its original state each time even when press is repeatedly implemented. <P>SOLUTION: This apparatus 1 for manufacturing the microscopic transfer sheet comprises a mold 3 on which surface the minute shape is formed, a plate 15a for pressing a sheet-like resin substrate 2 onto the surface of the mold 3, and a buffer material 17 provided between the sheet-like resin substrate 2 and the plate 15a, where cushioning amount of the buffer material 17 is 50 μm or more and recovery rate from deformation of the buffer material is 40% or more. The method for manufacturing the microscopic transfer sheet comprises pressing the sheet-like resin substrate 2 onto the mold 3 by the plate 15a through the buffer material 17 to transfer the minute shape on the surface of the resin substrate 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a manufacturing apparatus for a fine shape transfer sheet and a method for manufacturing a fine shape transfer sheet. More specifically, the present invention relates to a fine shape transfer sheet manufacturing apparatus and a fine shape transfer sheet manufacturing method that do not cause uneven transfer.

Conventionally, as a means of manufacturing optical films such as light guide plates, light diffusing plates, and lenses, press molding is used to transfer fine irregularities provided on the surface of a mold (stamper) onto the surface of a sheet-like substrate such as a thin film. Methods are known (Patent Document 1 and Patent Document 2).
Further, in such a press molding method, the effect of the buffer material cannot be effectively utilized particularly when the mold (stamper) is pressed against the sheet-like base material, and transfer unevenness may occur.

Based on such a viewpoint, it has been proposed to press a stamper and a base material through a buffer material (Patent Document 3).
However, in the proposal of Patent Document 3, physical properties and the like have not been studied as a specific cushioning material. For example, a commercially available polyimide film, Teflon (registered trademark), silicone rubber, PET film, polyethylene film, NBR Even if these commercially available materials are used, deformation of the buffer material occurs each time the press is repeated, resulting in a decrease in the thickness of the buffer material and uneven transfer. The problem of causing it was not completely solved.

JP 2005-199455 A JP-A-2005-310286 JP 2004-288804 A (paragraph 0018)

  In view of the above-described points, the object of the present invention is to restore the reduced thickness of the cushioning material to the original state each time even if the press is repeatedly performed. An object of the present invention is to provide a fine shape transfer sheet manufacturing apparatus and a fine shape transfer sheet manufacturing method that can be transfer-molded without generation.

  The apparatus for producing a fine shape transfer sheet of the present invention that achieves the above-described object includes a mold having a fine shape formed on the surface, a plate plate that presses a sheet-like resin substrate on the surface of the mold, and the sheet. Apparatus for producing a fine shape transfer sheet including a buffer material provided between a position where a resin-like resin base material is inserted and a plate plate, and a cushion amount measured by a method described later of the buffer material is 50 μm or more In addition, the deformation recovery rate is 40% or more.

  In addition, the method for producing a fine shape transfer sheet of the present invention is a method in which a sheet-like resin base material is supplied to a surface of a mold having a fine shape formed on the surface thereof, and then a sheet-like resin by a plate plate through a buffer material. A manufacturing method of a fine shape transfer sheet that transfers a fine shape to the surface of a sheet-like resin base material by pressing the base material against a mold, and the cushion amount measured by a method described later as a cushioning material is 50 μm or more and A cushioning material having a deformation recovery rate of 40% or more is used.

  According to the present invention, even if pressing is repeatedly performed, the thickness reduction of the buffer material is restored to the original state each time, and transfer molding can be performed on the sheet-shaped resin substrate without causing uneven transfer.

It is the schematic sectional drawing which looked at the manufacturing device of the fine shape transfer sheet of the present invention from the width direction of the sheet-like resin substrate. It is the schematic sectional drawing which looked at the operation | movement which intermittently forms a roll-shaped continuous film using the apparatus of this invention shown in FIG. 1 from the sheet-like resin base-material width direction. It is the schematic sectional drawing which looked at the operation | movement which intermittently forms a roll-shaped continuous film using the apparatus of this invention shown in FIG. 1 from the sheet-like resin base-material width direction, and is the downstream following the operation | movement shown in FIG. This shows the operation. It is the schematic sectional drawing which looked at the device which applies the load for evaluating heat resistance and releasability from the front.

  Hereinafter, the apparatus for producing a fine shape transfer sheet and the method for producing a fine shape transfer sheet of the present invention will be described in more detail.

  First, a manufacturing apparatus for a fine shape transfer sheet of the present invention includes a mold having a fine shape formed on a surface, a plate plate that presses a sheet-like resin base material on the surface of the mold, and a sheet-like resin base material. Is a manufacturing apparatus for a fine shape transfer sheet including a cushioning material provided between a position where a sheet is inserted and a plate plate, wherein the cushioning material has a cushion amount of 50 μm or more and a deformation recovery rate of 40% or more. It is made of materials.

  In the method for producing a finely shaped sheet according to the present invention, a sheet-like resin base material is supplied to the surface of a mold having a fine shape formed on the surface, and then the resin base material is gold-plated by a plate plate through a cushioning material. A method of manufacturing a fine shape transfer sheet that presses against a mold and transfers a fine shape onto the surface of a resin base material, wherein a cushioning material having a cushion amount of 50 μm or more and a deformation recovery rate of 40% or more is used. Is the method.

  By adopting such a configuration and method, even when the sheet-shaped resin base material is pressed (pressed) onto the mold by the plate plate and the fine shape is transferred to the surface of the sheet-shaped resin base material, the pressing may be repeatedly performed. The thickness reduction of the buffer material is restored to the original state each time, and transfer molding can be performed without causing uneven transfer on the sheet-like resin base material.

The cushioning material according to the present invention is required to have a cushion amount of 50 μm or more. Here, the cushion amount in the present invention means that the buffer material is pressed with a dial gauge attached with a standard measuring element (No900030), and the thickness of the buffer material when no load is applied to the dial gauge pressing portion is d0 (μm), 500 g. It is a value obtained by the following formula, assuming that the thickness of the buffer material when a load is applied is d500 (μm).
-Cushion amount ([mu] m) = (d0-d500).

  When the cushion amount is 50 μm or more, when the sheet-shaped resin base material is pressed onto the mold by the plate plate and the fine shape is transferred to the surface of the sheet-shaped resin base material, transfer unevenness is caused on the sheet-shaped resin base material. Transfer molding can be performed without any problem. The cushion amount is more than the sum of the uneven thickness of the cushioning material itself, the uneven thickness of the plate, the fine uneven pattern depth of the mold with a fine shape, the uneven thickness of the mold itself, and the uneven thickness of the sheet-like resin substrate. Since it is preferable to make it large, the cushion amount is preferably 140 μm or more. Further, the upper limit of the cushion amount is not particularly specified, but if the thickness reduction is too large, it becomes difficult to maintain the thickness near the original state even if the deformation recovery rate is high.

The buffer material is required to have a deformation recovery rate of 40% or more. Here, the deformation recovery rate in the present invention refers to the thickness of the buffer material when the buffer material is pressed with a dial gauge attached with a standard gauge (No900030) and no load is applied to the dial gauge press part, d0 (μm), The thickness of the buffer material when a load of 250 g is applied is d250 (μm), and the thickness of the buffer material after 10 seconds after the load of 250 g is applied and released is d′ 250 (μm). It is a value to be obtained.
Deformation recovery rate (%) = {(d′ 250−d250) / (d0−d250)} × 100.

  When the deformation recovery rate is 40% or more, when the sheet-shaped resin base material is pressed onto the mold by the plate plate and the fine shape is transferred to the surface of the sheet-shaped resin base material, the cushioning material Each time, the thickness reduction is restored to near the original state. After all, this means that the cushion amount of the cushioning material is restored to near the state before pressing. As a result, even if pressing is repeatedly performed, transfer molding can be performed on the sheet-shaped resin base material without causing uneven transfer. The deformation recovery rate is preferably 50% or more, more preferably 60% or more. The upper limit of the deformation recovery rate is 100% because the thickness of the buffer material is completely restored.

  Since the cushioning material has a cushion amount of 50 μm or more and a deformation recovery rate of 40% or more, the material is an elastic base material laminated on one or both sides of the intermediate base material of the heat resistant base fabric. The composite sheet is preferably composed of a body and a film having heat resistance and releasability laminated on at least one side of the composite sheet. That is, the composite sheet has a configuration of “elastic body / intermediate base material” or “elastic body / intermediate base material / elastic body”, and the cushioning material is a film having heat resistance and releasability on at least one side of the composite sheet. It becomes the laminated structure. The cushioning material having such a configuration is preferable because it has few cushioning materials, that is, a few materials having both a high cushioning amount and a high deformation recovery rate.

  As a configuration of the cushioning material, the composite sheet is composed of “elastic body / intermediate base material / elastic body”, and a film having heat resistance and releasability is laminated on one side of the composite sheet. The configuration of “film / elastic body / intermediate substrate / elastic body” having heat resistance and releasability is more preferable in practice. By laminating both sides of the heat-resistant base fabric, which is an intermediate base material, with an elastic body, it is practically more preferable because fragments of the heat-resistant base fabric are less likely to scatter. Furthermore, it is also preferable to cover the four edge portions of the composite sheet “elastic body / intermediate base material / elastic body” with, for example, a heat-resistant polyimide tape in order to prevent fragmentation of the heat resistant base fabric. In this case, the portion where the tape is affixed is outside the mold size so that it does not come into contact with the mold when transferring the fine shape.

  Also, the main role of the film having heat resistance and releasability is to press the sheet-shaped resin substrate with the plate plate, and when the press is released, the sheet-shaped resin substrate is detached from the mold, and the plate plate It is to avoid suitably the problem of following. Therefore, the film may be laminated on one side of the position where the sheet-like resin base material of the composite sheet is inserted, which is preferable because the cost of the cushioning material is lower than the lamination on both sides.

  Examples of the intermediate base material of the heat resistant base fabric of the composite sheet in the present invention include heat resistant nylon. Whether or not the base fabric has “heat resistance” is determined by a test described later. The “base fabric” refers to a fabric that serves as a base of the composite sheet. If this base fabric does not have heat resistance, the elastic body protrudes during high-temperature pressing, and transfer unevenness occurs during the production of the fine shape transfer sheet.

  Examples of such elastic bodies include fluorine rubber, silicon rubber, ethylene propylene rubber, isobutylene isoprene rubber, acrylonitrile butadiene rubber, and the like. Especially, when pressing the sheet-shaped resin base material to the mold with the plate plate and transferring the fine shape to the surface of the sheet-shaped resin base material, the press plate or the mold may be heated, so it has excellent heat resistance. Fluoro rubber is particularly preferred.

  A sheet-shaped resin substrate is pressed (pressed) onto a mold with a plate plate by a composite sheet material composed of an intermediate substrate of a heat-resistant base fabric and an elastic body laminated on one side or both sides of the intermediate substrate. When the fine shape is transferred to the surface of the sheet-shaped resin base material, when the press is repeatedly performed, the thickness reduction of the buffer material is restored to near the original state each time, causing uneven transfer on the sheet-shaped resin base material. Transfer molding can be performed without any problem. An example of the composite sheet is model number F200 manufactured by Kinyo Co., Ltd.

  When pressing the sheet-shaped resin substrate against the mold by the plate plate, as a film having heat resistance and releasability, laminated on the composite sheet and installed on the side in contact with the non-molded surface of the sheet-shaped resin substrate, Examples of the fluororesin film include tetrafluoroethylene-ethylene copolymer (ETFE), tetrafluoroethylene-6 fluoropropylene copolymer (FEP), and tetrafluoroethylene-perfluoroalkoxyethylene copolymer (PFA). . There is no particularly significant difference between ETFE, FEP, and PFA, and an example of the fluororesin film is Toyo Flon F (material: FEP). When a sheet-shaped resin substrate is pressed by a plate plate with a film having heat resistance and releasability and the press is released, the sheet-shaped resin substrate is detached from the mold and follows the plate plate. Can be suitably avoided. Furthermore, by pressing the plate plate directly on the non-molded surface of the sheet-like resin substrate, or by pressing with a cushioning material having a large surface roughness, the non-molded surface of the sheet-like resin substrate is scratched, The effect of avoiding the transfer of the surface roughness of the plate or the buffer material can also be expected.

On the contrary, if there is a scratch on the non-molded surface of the sheet-shaped resin base material before molding, the surface is roughened by particles in order to make it have no problem in appearance and performance. A fine uneven film having releasability can also be used. By using the fine concavo-convex film, the fine concavo-convex shape can be transferred to the non-molded surface side of the sheet-shaped resin substrate, the scratches and the like can be made inconspicuous, and the performance can be maintained. Such a fine concavo-convex film uses, for example, an optical polyester film (Lumirror (registered trademark) U46 manufactured by Toray Industries, Inc., thickness 100 μm), and a hard coat agent (JSR manufactured Desolite (registered trademark) Z7528) on an easily adhesive surface. A paint in which acrylic resin particles (particle diameter 2.0 μm, refractive index 1.53 concentration: 3% by mass in the solid content of the coating material) are diluted with isopropyl alcohol to a solid content concentration of 30% by mass is obtained with a small-diameter gravure coater. It is obtained by coating, drying at 80 ° C. for 1 minute, and then irradiating and curing with ultraviolet light 1.0 J / cm ² to provide a fine uneven layer having a thickness of 3 μm. Moreover, a film with a release coat having a release film crosslinked with a silicone resin or an acrylic resin that does not contain commercially available particles can also be used. For example, a polyester film with a release coating (Toray Film Processing Co., Ltd. Cerapeel (registered trademark) BX) can be exemplified.

  The film having heat resistance and releasability may be any synthetic resin (thermoplastic resin, thermosetting resin). Further, a thermoplastic film made of a thermoplastic resin and a thermosetting resin film made of a thermosetting resin may be formed on the surface of the thermoplastic film regardless of a forming means such as a coating. However, the thermoplastic resin is preferably a thermoplastic film composed of a thermoplastic resin because the thermoplastic resin has appropriate flexibility and can be selected as compared with the thermosetting resin.

  Whether the film having heat resistance and releasability in the present invention has “heat resistance” or “release property” is determined by a test described later. If this film is not heat resistant, the film surface will deteriorate each time the high-temperature press is repeated, and the desired surface shape cannot be obtained on the non-molded surface of the sheet-like resin substrate during the production of the fine shape transfer sheet. There is a case. Also, if this film does not have releasability, the sheet-shaped resin substrate is released from the mold when the sheet-shaped resin substrate is pressed with a plate plate and the press is released during the production of the fine shape transfer sheet. As a result, the problem of following the plate plate frequently occurs, and as a result, the throughput is significantly reduced, which adversely affects the manufacturing cost.

  The thickness of the film having heat resistance and releasability is preferably in the range of 50 μm to 500 μm. If the thickness is greater than 500 μm, the role of restoring the thickness reduction of the cushioning material when the pressing is repeatedly performed with the composite sheet to the original state may be hindered each time. The thickness of the film having heat resistance and releasability is more preferably in the range of 50 μm to 150 μm. Here, the “non-molded surface of the sheet-like resin base material” is a surface opposite to the surface (molded surface) that comes into contact with the mold when pressed by the plate plate.

  A composite sheet composed of an intermediate base material and an elastic body of a heat-resistant base fabric and a film having heat resistance and releasability may be laminated with a known heat-resistant adhesive or not laminated. Even if it is laminated, the effect is sufficiently exhibited. Whether the base fabric of the intermediate base material that constitutes the cushioning material has "heat resistance", and whether the film laminated on the composite sheet that constitutes the cushioning material has "heat resistance" and "release property" are as follows Perform a test to determine Two sheets of the same cushioning material are prepared, and the two cushioning materials are overlapped so that the film surfaces having heat resistance and releasability overlap. In other words, the superposed structure is “composite sheet (elastic body / intermediate base material / elastic body) / film having heat resistance and releasability / film having heat resistance and releasability / composite sheet (elastic body / intermediate body). Substrate / elastic body). In this state, the laminated material is stored at 150 ° C. for 1 hour while applying a 1 MPa load. As an apparatus which applies a load, the model number ink blocking tester DG-BT DG2020 series made from DG Engineering, Inc. is mentioned, for example.

  Even if the two cushioning materials stored under the above conditions are not in close contact, and should be in close contact, the film laminated on the composite sheet is “heat resistant” and “release” as long as it can be removed with bare hands. It is determined that it has “sex”. When the film laminated | stacked on the composite sheet does not have "heat resistance" or "release property", this test | inspection makes films adhere and it becomes impossible to peel off two cushioning materials easily.

  In addition, if the deformation recovery rate of each cushioning material after the test under the above conditions is less than 20% lower than the deformation recovery rate before the test, the base fabric of the intermediate base material is “heat resistant”. If the decrease is 20% or more, it is determined that the intermediate base fabric does not have “heat resistance” (decrease in deformation recovery rate of buffer material (%) = Deformation recovery rate of buffer material before test (%)-Deformation recovery rate of buffer material after test (%)).

  The buffer material preferably has a thickness in the range of 0.3 mm to 5 mm. The cushioning amount of the cushioning material includes the thickness irregularity of the cushioning material itself, the thickness irregularity of the plate plate, the fine uneven pattern depth of the mold having a fine shape and the thickness irregularity of the mold itself, and the thickness irregularity of the sheet-like resin base material. The thickness of the cushioning material is preferably 0.3 mm or more in consideration of the fact that as the thickness of the cushioning material increases, the cushion amount increases. Further, considering the handling property of installing the buffer material on the plate plate, the thickness of the buffer material is preferably 5 mm or less, which is preferable. The thickness of the buffer material is more preferably 2.0 to 2.5 mm.

  The cushioning material is composed of a composite sheet composed of an intermediate base material of a heat resistant base fabric and an elastic body covering one side or both sides of the intermediate base material, and a film having heat resistance and releasability. In some cases, the thickness of the cushioning material is the combined thickness of the intermediate base material and the composite sheet, which is an elastic body covering the intermediate base material, and the film.

  The mold according to the present invention has a fine pattern on its transfer surface. As a method for forming a pattern on a mold, there are machining, laser processing, photolithography, an electron beam drawing method, and the like. As the material of the mold, any material can be used as long as desired pressing strength, pattern processing accuracy, and film releasability can be obtained. For example, metallic materials including stainless steel, nickel, copper, etc., silicone, glass, Ceramics, resins, or those whose surfaces are coated with an organic film for improving releasability are preferably used. The fine pattern of the mold is formed corresponding to the fine uneven pattern desired to be applied to the film surface.

  The plate plate according to the present invention plays a role of pressing the sheet-shaped resin substrate in the mold direction when the sheet-shaped resin substrate is pressed onto the mold and the fine shape is transferred onto the surface of the sheet-shaped resin substrate. It is. The flatness on the film pressing surface side of the plate plate is preferably 10 μm or less, more preferably 5 μm or less. Moreover, when pressing a sheet-like resin base material, the function which can control heating / cooling may be provided to a plate board so that a sheet-like resin base material can be heated and cooled.

FIG. 1 shows a schematic cross-sectional view of an example of the apparatus for producing a fine shape transfer sheet of the present invention as viewed from the width direction of a sheet-like resin base material.
As shown in FIG. 1, the fine shape transfer sheet manufacturing apparatus 1 of the present invention includes a press unit 10, a release unit 20, a heater unit 30, a cooling unit 40, an unwinding unit 50, and a winding unit 60. Consists of The sheet-like resin base material 2 wound up in a roll shape by the unwinding unit 50 is unwound, the fine uneven shape of the mold 3 is transferred and formed by the press unit 10, and is wound into a roll shape by the winding unit 60. Taken. The unwinding unit 50 and the winding unit 60 are the above-mentioned sheet-like resin base material conveying devices. The press unit 10 is connected to the press cylinder 12 so that the pressure plate (upper) 14a can be moved up and down using the support column 11 as a guide. The support column 11 is disposed so as to be sandwiched between the frame (upper) 16a and the frame (lower) 16b. A temperature control plate (upper) 15a is attached to the lower surface of the pressure plate (upper) 14a. On the other hand, a temperature control plate (lower) 15b is attached to the upper surface of the pressure plate (lower) 14b. A heating unit 30 and a cooling unit 40 are connected to each temperature control plate via piping, wiring, and the like. And the metal mold | die 3 is attached to the upper surface of the temperature control plate (lower) 15b, and heating and cooling control are carried out via the lower temperature control plate. The temperature control plate (upper) 15a functions as a plate plate according to the present invention. In addition, the metal mold | die 3 may be attached to the lower surface of the temperature control plate (upper) 15a. In this case, the temperature control plate (lower) 15b functions as a plate plate according to the present invention. The press cylinder is connected to a hydraulic pump (not shown) and an oil tank, and the hydraulic pump controls the raising and lowering operation of the pressure plate (upper) 14a and the applied pressure. In this embodiment, a hydraulic press cylinder is applied, but any mechanism can be used as long as it can control the applied pressure. The pressure range is preferably controllable in the range of 0.1 MPa to 20 MPa, more preferably 1 MPa and in the range of 10 MPa. The pressurization speed of the press cylinder can be controlled in the range of 0.01 MPa / s to 1 MPa / s, more preferably in the range of 0.05 MPa / s to 0.5 MPa / s. In addition, when the mold 3 is attached to the upper surface of the temperature control plate (lower) 15b so that the sheet-shaped resin base material can be molded without any unevenness even if there is some thickness unevenness, the temperature control The buffer material 17 is installed between the plate (upper) 15 a and the sheet-like resin base material 2. Further, when the mold 3 is attached to the lower surface of the temperature control plate (upper) 15 a, the buffer material 17 is installed between the temperature control plate (lower) 15 b and the sheet-like resin base material 2. As the buffer material 17, a material having a deformation recovery rate of 40% or more and a cushion amount of 50 μm or more is used. For example, a composite sheet composed of an intermediate base material of a heat resistant base fabric and an elastic body laminated on one side or both sides of the intermediate base material, and heat resistance and releasability laminated on at least one side of the composite sheet What is comprised with the film which has is used.

  By using a cushioning material 17 having a deformation recovery rate of 40% or more and a cushion amount of 50 μm or more, even when the pressing is repeated, the thickness reduction of the cushioning material is close to the original state. Each time it is restored, transfer molding can be performed without causing uneven transfer on the substrate.

  Next, the mold release unit 20 which is said mold release apparatus is demonstrated. As shown in FIG. 1, the release unit includes a peeling roll 21 and an auxiliary roll 22, and a peeling roll rotating means (not shown) is connected to the peeling roll 21, and the rotation is controlled at a specified number of rotations. The peeling roll rotating means may be any means that can control the number of rotations, but a servo motor is more preferable so that the amount of rotation can be strictly controlled. Further, a linear guide or the like is attached to the upper surface of the pressure plate (lower) 14b so that the peeling roll 21 can move smoothly in parallel with the surface of the mold 3 while rotating.

  On the other hand, the auxiliary roll turning means as the auxiliary roll moving means is connected so that the auxiliary roll 22 can turn along the outer surface of the peeling roll 21. The auxiliary roll turning means may be any means that can move the auxiliary roll up and down along the outer periphery of the peeling roll around the peeling roll, such as an electromagnetic motor or an actuator using pneumatic pressure. The both ends of the auxiliary roll are attached so as to freely rotate around the roll axis.

  The operation of supplying the sheet-shaped resin substrate that is actually released from the mold surface and then molded next will be described.

  Before the mold release operation, the auxiliary roll 22 is moved almost above the peeling roll 21 at the winding side end position. Thereafter, the peeling roll is rotated by the peeling roll rotating means. As the peeling roll rotates, it moves straight along the surface of the mold 3 to the sheet-shaped resin substrate unwinding side, and at the same time, the sheet-shaped resin substrate adhered to the mold is released while being held by the peeling roll. Go. When the release of the sheet-shaped resin base material is completed in the entire region of the mold, the sheet-shaped resin base material is pulled by rotating the conveyance drive roll on the downstream side while applying a brake so that the peeling roll does not rotate. Then, the unit of the peeling roll and the auxiliary roll moves straight to the sheet-shaped resin base winding side in a state where the sheet-like resin base is hung between the peeling roll and the auxiliary roll.

  When the peeling roll returns to the end position on the winding side, the auxiliary roll swiveling means turns the auxiliary roll substantially below the peeling roll to release the sheet-like resin base material. The above-described peeling operation depends on the rotation speed of the peeling roll, and the peeling speed can be performed at substantially the same speed as the peripheral speed of the roll. Therefore, it is possible to strictly control the peeling operation, and it is possible to easily create smooth peeling conditions for all molding materials and conditions.

  Further, another embodiment of the release unit will be described. In addition to the configuration described above, a peeling roll linear motion means such as a linear motor, an electromagnetic cylinder, or a pneumatic cylinder is connected to the peeling roll. When peeling the sheet-like resin base material, the peeling roll rotating means is driven to drive the peeling roll linear motion means while keeping a constant torque, and the release unit is moved to the unwinding side for peeling. When the peeling operation is completed, the conveyance drive roll on the downstream side is rotated with the rotation of the peeling roll stopped in the same manner as described above, and the sheet-like resin base material is pulled.

  Next, the heating unit 30 will be described. The heating unit 30 is preferably a temperature control plate (upper), (lower) 15a, 15b made of an aluminum alloy and controlled by an electric heater cast in the plate. Alternatively, the heating control may be performed by flowing a temperature-controlled heat medium into a copper or stainless steel pipe cast in the temperature control plate or a hole processed by machining. Furthermore, the apparatus structure which combined both may be sufficient.

As the heat medium, Barrel Therm (Matsumura Oil Co., Ltd.), NeoSK-OIL (Soken Techniques Co., Ltd.) or the like may be used, and water heated to 100 ° C. or higher may be circulated. And it is preferable that the number of lay nozzles in the pipe is in the range of 1.0 × 10 ^{4 to} 12 × 10 ⁴ so that heat can be transferred efficiently.

  Moreover, when using a cast heater, a cartridge heater, etc., it is preferable that the temperature control plate can be divided and controlled.

  It is preferable that the temperature control plate falls within a temperature distribution within 10 ° C., more preferably within 5 ° C., in the range during temperature increase, temperature decrease, and constant temperature control.

  Alternatively, the heat medium piping line may be processed directly on the mold to directly control the temperature of the mold.

  Next, the cooling unit 40 will be described. The cooling unit performs cooling control by flowing a temperature-controlled refrigerant body into copper or stainless steel pipes cast into temperature control plates (upper) (lower) 15a and 15b, or holes machined.

As the coolant, water is optimal, but an ethylene glycol solution or the like may be used. The temperature is preferably in the range of 10 ° C. to 50 ° C., and the number of lay nozzles in the pipe is preferably in the range of 1.0 × 10 ^{4 to} 12 × 10 ⁴ so that heat can be transferred efficiently.

  The unwinding unit 50 and the winding unit 60, which are sheet-like resin base material transport devices, will be described. The unwinding unit 50 includes an unwinding roll rotating means 51, conveying rolls 52 a to 52 d, a drawing buffer unit 53, and a sheet-like resin base material fixing unit 54. The winding unit 60 includes a winding roll rotating means 61, conveyance rolls 62 a to 62 c, a winding buffer unit 63, a conveyance driving roll 64, and a sheet-like resin base material fixing unit 65.

  The drawer buffer unit 53 and the take-up buffer unit 63 are respectively composed of boxes 55 and 66 and suction / exhaust means 56 and 67 connected thereto. The suction / exhaust means 56, 67 may be anything that can suck and exhaust air, such as a vacuum pump. By exhausting the air in the box, the pressure difference between the front and back surfaces of the sheet-like resin substrate inserted in the box By giving a constant tension, the sheet-like resin base material is loosened and held in the box. The length of the sheet-shaped resin base material inserted into the box is suitably the length of the sheet-shaped resin base material that is intermittently conveyed before and after the sheet-shaped resin base material is molded. Further, sensors 57a, 57b, 68a, 68b are mounted in the boxes 55, 66. The sensor may be any sensor that can detect the sheet-like resin substrate at a predetermined position. When the sheet-shaped resin substrate is released and transported by the release unit described above and the sheet-shaped resin substrate is removed from the sensor detection position in the box, the upstream / downstream unwinding roll rotating means 51 or the winding roll By driving the roll rotating means 61, the sheet-like resin substrate can be unwound or wound up, and the sheet-like resin substrate can be always stretched or loosened at a predetermined position in the box.

  The sheet-like resin base material fixing portions 54 and 65 are preferably flat plates with suction holes formed on the surface, but also have a mechanism for sandwiching the sheet-like resin base material with clips, or a combination thereof. It may be a thing.

  The sheet-like resin base material fixing portions 54 and 65 are both operated when performing the pressing operation. And when releasing a sheet-like resin base material, it is preferable to operate the sheet-like resin base material fixing | fixed part 54, to fix a sheet-like resin base material, and to open the sheet-like resin base material fixing | fixed part 65. FIG. Moreover, when supplying a sheet-like resin base material, it is preferable to open both the sheet-like resin base material fixing parts 54 and 65.

  Although not shown, the conveyance drive roll 64 is connected to a rotation drive means such as a motor, and the nip roll 64a is close to the conveyance drive roll 64 when the sheet-like resin base material is conveyed. The sheet-shaped resin substrate is conveyed under a constant tension while performing torque control.

  Next, the sheet-like resin substrate 2 of the fine shape transfer sheet according to the present invention will be described. The sheet-like resin base material of the fine shape transfer sheet may be a thin plate-like material mainly composed of a thermoplastic resin, and is a single layer made of a molding thermoplastic resin (hereinafter, molding thermoplastic resin) described later. A two-layer laminate in which a molding thermoplastic resin is laminated on one side of the body, a support, a molding thermoplastic resin on one side of the support, and a resin different from the molding thermoplastic resin on the other side 3 Examples of the layer laminate include a three-layer laminate in which a molding thermoplastic resin is laminated on both surfaces of a support. The monolayer is excellent in handling on the film. The two-layer laminate can impart surface characteristics such as slipperiness and friction resistance, mechanical strength, and heat resistance to the surface opposite to the surface on which the molding thermoplastic resin is disposed. Moreover, since the use of an expensive thermoplastic resin for molding can be reduced, the cost can be suppressed as compared with a single-layer body. The three-layer laminate is preferable from the viewpoint that curling after molding can be prevented because the resin is laminated on both sides of the support. In particular, a three-layer laminate in which a thermoplastic resin for molding is laminated on both sides of a support is preferable because the properties of the resins on both sides are the same and curling can be easily prevented. In addition, a single layer body made of a thermoplastic resin for molding, or a layer made of a thermoplastic resin for molding on the molding surface of a two-layer laminate or a three-layer laminate has a molding heat within a range that does not impair the effects of the present invention. Components other than the plastic resin may be included. In addition, the thickness of the sheet-like resin base material is preferably in the range of 0.01 to 3 mm, more preferably in the range of 0.01 to 1 mm. If it is less than 0.01 mm, the thickness may not be sufficient for molding, and if it exceeds 3 mm, it may be difficult to convey due to the rigidity of the substrate.

  The thermoplastic resin for molding according to the present invention has a glass transition temperature Tg of preferably 40 to 180 ° C, more preferably 50 to 160 ° C, still more preferably 50 to 120 ° C, and most preferably 70 to 100 ° C. Resin. When the glass transition temperature Tg is less than 40 ° C., the heat resistance of the molded product is lowered and the shape may change with time. In addition, if the temperature exceeds 180 ° C., the molding temperature must be increased, resulting in inefficiency in energy, and the volume fluctuation during heating / cooling of the film increases, so that the film can be bitten into the mold and released. Even if it disappears or can be released from the mold, the transfer accuracy of the pattern may be lowered, or the pattern may be partially lost, which may be a defect. The thermoplastic resin for molding is preferably a polyester resin such as polyethylene terephthalate, polyethylene-2, 6-naphthalate, polypropylene terephthalate or polybutylene terephthalate, or a polyolefin resin such as polyethylene, polystyrene, polypropylene, polyisobutylene, polybutene or polymethylpentene. Resin, cyclic polyolefin resin, polyamide resin, polyimide resin, polyether resin, polyester amide resin, polyether ester resin, acrylic resin, polyurethane resin, polycarbonate resin, polyvinyl chloride resin, etc. It consists of a thermoplastic resin. Among these, there are various types of monomers to be copolymerized, and it is easy to adjust the physical properties of the materials, so that polyester resins, polyolefin resins, polyamide resins, acrylic resins or these are particularly preferable. It is preferable that it is mainly formed from a thermoplastic resin selected from these mixtures, and it is more preferable that the above-mentioned thermoplastic resin consists of 50% by mass or more.

  Next, a series of sheet-shaped resin base material forming operations by the fine shape transfer sheet manufacturing apparatus 1 will be described. 2 and 3 are schematic cross-sectional views of the operation of intermittently forming a roll-shaped continuous sheet-shaped resin substrate using the apparatus of the present invention as viewed from the sheet-shaped resin substrate width direction, and will be described below. It shape | molds by the flow of process (A)-(K).

  (A) After the mold 3 is set in the press unit 10 in advance, the sheet-shaped resin base material 2 is set in the unwinding unit 50, the unwinding part of the sheet-shaped resin base material 2 is pulled out, and then passed through the guide roll. Then, along the surface of the mold in the press unit, the sheet is further wound by the winding unit 60 via the release unit 20 (see FIG. 2A).

  (B) Next, the heating unit is operated to raise both the temperature control plate (upper) 15a and the temperature control plate (lower) 15b to the molding temperature.

  (C) The press unit 10 is operated to lower the temperature control plate (upper) 15a and press the sheet-shaped resin base material between the surface of the mold 3 and the temperature control plate (upper). . At this time, the sheet-shaped resin substrate fixing portions 54 and 65 are operated to fix the sheet-shaped resin substrate. Conditions such as temperature, press pressure increase rate, and pressurization time depend on the material of the sheet-like resin base material, the transfer shape, particularly the aspect ratio of the unevenness. In general, the molding temperature is set to 100 to 180 ° C., the press pressure is set to 1 to 10 MPa, the molding time is set to 1 to 60 seconds, and the pressurization speed is set in the range of 0.05 MPa / s to 1 MPa / s (FIG. 2B). reference).

  (D) After completing the press while heating, the cooling unit is operated to lower the temperature of the temperature control plate (upper) 15a and the temperature control plate (lower) 15b. In addition, it is preferable that pressurization is continued during cooling. The cooling temperature is set so that the temperature on the mold surface is sufficiently cooled to release the sheet-like resin substrate. For example, the surface temperature of the mold 3 may be cooled to the glass transition point of the sheet-like resin base material or less.

  (E) After the cooling is completed, the press pressure is released, and the temperature control plate (upper) 15a is raised to a position where a sufficient space can be secured for the release unit 20 to move horizontally in the press device (FIG. 2 ( c)).

  (F) After the temperature control plate (upper) 15a completes the rise, the sheet-shaped resin base material fixing portion 65 is opened, the auxiliary roll turning means is driven, and the auxiliary roll 22 is turned to the upper part of the peeling roll 21. It is moved and the sheet-like resin base material 2 is embraced by the peeling roll 21 and the auxiliary roll 22 (see FIG. 2D).

  (G) Thereafter, the peeling roll 21 is rotated in the direction of 23a on the surface of the sheet-like resin substrate. The peeling roll 21 moves in the direction 23b simultaneously with the rotation by the frictional force with the surface of the sheet-like resin substrate. The movement is performed while being guided by a linear motion guide of the peeling roll provided on the pressure plate of the press device. At this time, the sheet-like resin base material that is in close contact with the mold surface is satisfactorily released (see FIG. 3 (e)).

  (H) When peeling to the unwinding side end of the mold 3 is completed, the rotation of the peeling roll is stopped (see FIG. 3F).

  (I) Thereafter, the release roll 21 and the auxiliary roll 22 are positioned relative to each other by applying a brake so that the release roll does not rotate, opening the sheet-like resin base material fixing portion 54 and rotating the transport drive roll 64. Move to the winding side while maintaining At this time, a new sheet-shaped resin base material is pulled out from the unwinding side, and the molded sheet-shaped resin base material is sent out to the winding side (see FIG. 3G).

  (J) When the drawing of the sheet-shaped resin substrate is completed, the sheet-shaped resin substrate fixing portion 54 fixes the sheet-shaped resin substrate, and then the auxiliary roll pivots back to the original position to return the sheet-shaped resin substrate. The sheet-like resin base material is fixed by the material fixing portion 65. By supplying a new sheet-like resin base material, the sheet-like resin base material that has been loosened in advance in the drawing buffer unit 53 is drawn out to the take-up side, but until the position where the sensor 57b detects the sheet-like resin base material. Then, the unwinding roll rotating means is operated, and a new sheet-like resin base material is supplied from the unwinding roll to the pulling-out buffer unit. On the other hand, when the sheet-shaped resin base material that has been molded is sent out, the sheet-shaped resin base material corresponding to the length that has been sent out is temporarily held in the take-up buffer unit 63, and the sheet-shaped resin base material is received by the sensor 68a. The sheet-like resin base material corresponding to the newly accumulated length is wound up by operating the winding roll rotating means (see FIG. 3 (h)).

  (K) At the same time as the release of the sheet-shaped resin substrate is completed, or immediately before that, heating of the temperature control plate (upper) (lower) is started. Then, the press unit 10 is operated to lower the temperature control plate (upper) to the vicinity of the upper surface of the sheet-like resin base material.

  After the temperature rise is completed, press molding is performed, and the above-described operation from (C) is repeated.

  By the operations (F) to (H) described above, it is possible to incorporate a smooth release operation into the molding cycle of the intermittent sheet-shaped resin base material, and it is possible to produce a high-quality molded film with few release marks. In addition, the sheet-like resin base material to be molded in the next cycle can be quickly supplied into the press unit by the above operation (I), so that intermittent sheet-like resin base material molding can be realized with high productivity. And a high quality molded film can be produced with high productivity by combining the release operation and supply operation of both sheet-like resin base materials.

(1) Measurement method of deformation recovery rate A standard gauge (No900030) is attached to a dial gauge (manufactured by Mitoyo Seisakusho) and installed on a dial gauge stand (No7001DGS-M). The thickness of the cushioning material when the load is not applied to the dial gauge holding part is d0, 250 g. The thickness of the cushioning material is d250, 250 g when applied, and 10 seconds after the load is released. The thickness of the cushioning material is determined by the following formula as d′ 250. In addition, the measured value was calculated | required as an average value of the value which measured three buffer materials once each.
Deformation recovery rate (%) = {(d′ 250−d250) / (d0−d250)} × 100.

(2) Cushion amount measurement method A standard gauge (No900030) is attached to a dial gauge (manufactured by Mitoyo Seisakusho) and installed on a dial gauge stand (No7001DGS-M). The thickness of the cushioning material when no load is applied to the dial gauge pressing portion is d0, and the thickness of the cushioning material when a load of 500 g is applied is d500, and is obtained by the following formula. In addition, the measured value was calculated | required as an average value of the value which measured three buffer materials once each.
Cushion amount (μm) = (d0−d500).

(3) Evaluation method of heat resistance and releasability Two buffer materials are prepared, and the two cushion materials are overlapped so that the film surfaces having heat resistance and releasability overlap.
In other words, the superposed structure is “composite sheet (elastic body / intermediate base material / elastic body) / film having heat resistance and releasability / film having heat resistance and releasability / composite sheet (elastic body / intermediate body). Substrate / elastic body).

  The film laminated in this state is stored at 150 ° C. for 1 hour while applying a load of 1 MPa. As the device 4 for applying a load, a model number ink blocking tester DG-BT DG2020 series (FIG. 4) manufactured by DG Engineering Co., Ltd. was used. First, the two cushioning materials (50 mm × 50 mm size) are overlaid on the stage 5 and allowed to stand. A weighting spring 6 with a stainless steel plate 8 at the upper end of the spring and a stainless steel ruler 9 at the lower end of the spring is placed on the two cushioning materials, and the weighting screw 7 is rotated clockwise. Turn the screw so that the lower part of the stainless steel plate installed at the upper end of the spring overlaps with the scale of the stainless steel ruler installed at the lower end of the spring, referring to the load conversion table. What was fixed in this state was stored at 150 ° C. for 1 hour, then taken out, the screw was rotated counterclockwise to release the load, and adhesion between the two cushioning materials was confirmed.

[Example 1]
(1) Mold size: 500 mm (sheet resin base material width direction) × 800 mm (sheet resin base material travel direction) × 20 mm (thickness).
(2) Mold material: copper.
(3) Fine shape: A pitch having a pitch of 50 μm, a convex portion width of 25 μm, and a convex portion height of 50 μm, and having a rectangular cross section when viewed from the running direction of the sheet-like resin substrate was used.
(4) Press device: It can pressurize up to 3000 kN, and pressurization is performed by a hydraulic pump. Two temperature control plates made of an aluminum alloy and having a size of 700 mm (in the sheet resin base material width direction) × 1000 mm (in the sheet resin base material running direction) are attached to the inside of the press device. Connected to the device. The mold is attached to the upper surface of the lower temperature control plate. The heating device is a heat medium circulation device, and the heat medium is Barrel Therm # 400 (manufactured by Matsumura Oil Co., Ltd.), which is heated to 150 ° C. and flows at a flow rate of 100 L / min. Moreover, a cooling device is a cooling water circulation device, and flows the water cooled at 20 degreeC with the flow volume of 150 L / min.
(5) Buffer material: Composite sheet (made by Kinyo Co., Ltd.) composed of an intermediate base material (heat-resistant nylon) of a heat-resistant base fabric having a thickness of 2.0 mm and fluororubber laminated on both sides of the intermediate base material F200) was prepared. A fluororesin film (Toray Film Processing Co., Ltd. model number: Toyoflon F) having a thickness of 100 μm was laminated on one side of the composite sheet to obtain a cushioning material. This cushioning material was attached to the upper temperature control plate with the surface opposite to the fluororesin film surface facing.
(6) Mold release apparatus: A combination of a peeling roll and an auxiliary roll having the same configuration as that shown in FIG. 1 was used.
(7) Sheet-like resin base material: thickness is 120 μm, layer structure is a two-layer structure (molding layer: low melting point polyethylene terephthalate (glass transition point: 75 ° C.) 40 μm, support layer: polyethylene terephthalate 80 μm).
(8) Operation method: Using the above apparatus, molding was performed intermittently as follows. In advance, the sheet-like resin substrate is passed from the unwinding device to the winding device via a press device. Next, after the temperature control plate is heated up and down to 110 ° C., the upper plate is lowered to start pressing the sheet-shaped resin base material. The press was performed at 7 MPa on the mold surface for 30 seconds. Thereafter, the temperature control plate is cooled both top and bottom while the press is continued. Cooling is stopped when each temperature control plate reaches 60 ° C. When the cooling is completed for both the upper and lower sides, the press is released. The upper plate is raised to the upper limit, and the release device is driven to release the sheet-like resin substrate.
(9) The above operation was repeated to produce 10 molded films. As a result of visual evaluation of the molding surface, the entire surface was in a uniform transfer state.

[Example 2]
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: a composite sheet (made by Kinyo Co., Ltd.) composed of an intermediate base material (heat resistant nylon) of a heat resistant base fabric having a thickness of 2.0 mm and fluororubber laminated on both sides of the intermediate base material F200) was prepared. A fine concavo-convex film having heat resistance and releasability is laminated on one side of this composite sheet, and the fine concavo-convex surface of the fine concavo-convex film produced by the following production method is directed toward the position where the sheet-shaped resin substrate is inserted. Affix to the upper temperature control plate.
Fine uneven film manufacturing method: Using an optical polyester film (Lumirror (registered trademark) U46, manufactured by Toray Industries, Inc., thickness of 100 μm), an acrylic resin particle (desolite (registered trademark) Z7528 manufactured by JSR) on an easy-bonding surface A particle diameter of 2.0 μm, a refractive index of 1.53 (concentration: 3% by mass in the solid content of the coating), and a paint diluted with isopropyl alcohol to a solid content concentration of 30% was applied with a small-diameter gravure coater, and 80 After drying for 1 minute at ° C., it is cured by irradiating with 1.0 J / cm ² of ultraviolet rays to provide a fine uneven layer having a thickness of 3 μm.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, the entire surface was in a uniform transfer state.

Example 3
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: On the upper temperature control plate, a silicon rubber with a thickness of 0.30 mm (EW-50 manufactured by Shibata Industries Co., Ltd.) and a white PET film with a thickness of 0.25 mm (Toray Industries, Inc. Lumirror) ) E6SL) are laminated and pasted so that the PET film surface is directed to the position where the sheet-like resin substrate is inserted.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, transfer unevenness is observed only in a very small part of the end portion, but it can be determined that the level is usable.

Example 4
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: a composite sheet (made by Kinyo Co., Ltd.) composed of an intermediate base material (heat resistant nylon) of a heat resistant base fabric having a thickness of 2.0 mm and fluororubber laminated on both sides of the intermediate base material F200) was prepared. A fluororesin film having a thickness of 200 μm (Toyoflon (registered trademark) F manufactured by Toray Film Processing Co., Ltd.) was laminated on one side of the composite sheet to obtain a buffer material. This cushioning material was attached to the upper temperature control plate with the surface opposite to the fluororesin film surface facing.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, transfer unevenness is observed only in a very small part of the end portion, but it can be determined that the level is usable.

Example 5
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: Composite sheet (made by Kinyo Co., Ltd.) composed of an intermediate base material (heat resistant nylon) of a heat resistant base fabric having a thickness of 2.0 mm and fluororubber laminated on both sides of the intermediate base material F200) was prepared. The composite sheet was laminated so that the non-release coating surface of a release PET film having a thickness of 78 μm (Toray Film Processing Co., Ltd., Cerapeel (registered trademark) BX single-sided non-particle silicone release coat film) was in contact with the composite sheet. And used as cushioning material. The cushioning material was attached to the upper temperature control plate with the surface opposite to the release film surface facing.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, the entire surface was in a uniform transfer state.

Example 6
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: a composite sheet (made by Kinyo Co., Ltd.) composed of an intermediate base material (heat resistant nylon) of a heat resistant base fabric having a thickness of 2.0 mm and fluororubber laminated on both sides of the intermediate base material F200) was prepared. A PET film (Lumirror (registered trademark) T60 manufactured by Toray Industries, Inc.) having a thickness of 100 μm was laminated on one side of the composite sheet to obtain a cushioning material. The cushioning material was attached to the upper temperature control plate with the surface opposite to the PET film surface facing.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, the entire surface was in a uniform transfer state. When the sheet-shaped resin base material was pressed by the plate plate with the PET film and the press was released, the sheet-shaped resin base material was a mold. It took a long time to make a long time due to the problem of coming off and following the plate. Accordingly, it has been found that since the throughput is greatly reduced, the manufacturing cost is adversely affected.

[Comparative Example 1]
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: A white PET film (Lumirror (registered trademark) E6SL manufactured by Toray Industries, Inc.) having a thickness of 0.25 mm is attached to the upper temperature control plate.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, in the second and subsequent sheets out of the 10 sheets, a large number of transfer unevenness was observed in addition to the end portions.

[Comparative Example 2]
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: Buffer material: A 0.188 mm thick PET film (Lumirror (registered trademark) T60 manufactured by Toray Industries, Inc.) is attached to the upper plate.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, transfer unevenness was observed in the entire area of the mold surface after the first of the 10 sheets.

[Comparative Example 3]
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: A silicon rubber with a thickness of 0.30 mm (EW-50 manufactured by Shibata Industries Co., Ltd.) is attached to the upper temperature control plate.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, in the second and subsequent sheets out of the 10 sheets, a large number of transfer unevenness was observed in addition to the end portions.

[Comparative Example 4]
Evaluation was performed in the same manner as in Example 1 except that the cushioning material was changed to the following.
(1) Buffer material: The white PET film (Lumirror (registered trademark) E6SL manufactured by Toray Industries, Inc.) used in Comparative Example 1 is attached to the upper temperature control plate.
(2) Ten molded films were prepared. As a result of visual evaluation of the molding surface, transfer unevenness was observed in the entire area of the mold surface after the first of the 10 sheets.

1: Manufacturing apparatus for fine shape transfer sheet 2: Sheet-like resin base material 3: Mold 4: Apparatus for applying load 5: Stage 6: Weight spring 7: Weight screw 8: Stainless steel plate 9: Stainless steel straight ruler 10: Press unit 11: Support column 12: Press cylinder 13: Lifting guide 14a, b: Pressure plate (upper), (lower)
15a, b: Plate plate (temperature control plate) (top), (bottom)
16: Frame 17: Buffer material 20: Release unit 21: Release roll 22: Auxiliary roll 30: Heater unit 40: Cooling unit 50: Unwind unit 51: Unwinding roll rotating means 52a to d: Guide roll 53: Pull-out buffer Unit 54: sheet-like resin base material fixing unit 55: box 56: suction / exhaust means 57a, b: sensor 60: take-up unit 61: take-up roll rotating means 62a to d: guide roll 63: take-up buffer unit 64: transport Drive roll 65: Sheet-like resin base material fixing part 66: Box 67: Suction / exhaust means 68a, b: Sensor

Claims (4)

A mold having a fine shape formed on the surface, a plate plate that presses the sheet-shaped resin base material on the surface of the mold, and a position between the plate plate and the position where the sheet-shaped resin base material is inserted An apparatus for producing a fine shape transfer sheet comprising a cushioning material provided in
An apparatus for producing a fine shape transfer sheet having a cushion amount defined in the specification of the buffer material of 50 μm or more and a deformation recovery rate of 40% or more. The cushioning material is a composite sheet composed of an intermediate base material of a heat resistant base fabric and an elastic body laminated on one side or both sides of the intermediate base material,
It is composed of a film having heat resistance and releasability laminated on at least one side of the composite sheet,
The apparatus for producing a fine shape transfer sheet according to claim 1, wherein the heat-resistant and releasable film surface of the cushioning material is directed to a position where the sheet-like resin substrate is inserted. After the sheet-shaped resin base material is supplied to the surface of the mold having the fine shape formed on the surface, the sheet-shaped resin base material is pressed against the mold by a plate plate through a cushioning material. A method for producing a fine shape transfer sheet for transferring a fine shape to the surface of a resin substrate,
A manufacturing method of a fine shape transfer sheet using a cushioning material having a cushion amount defined in the specification of 50 μm or more and a deformation recovery rate of 40% or more as the cushioning material. As the cushioning material,
A composite sheet composed of an intermediate base material of a heat-resistant base fabric, and an elastic body laminated on one side or both sides of the intermediate base material;
Using a cushioning material composed of a heat-resistant and releasable film laminated on at least one side of the composite sheet,
The manufacturing method of the fine shape transfer sheet of Claim 3 which orient | assigns the film surface which has this heat resistance and mold release property of this buffer material to the said sheet-like resin base material side.

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