JPH10272711A - Convexo-concave molding sheet and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent unnecessary adherence of fine protrusion forming resin to an expandable and shrinkable body sheet. SOLUTION: The convexo-concave molding sheet 1 is formed with fine protrusions 3 on one surface of an expandable and shrinkable body sheet 2 by injecting raw material before curing in recesses, placing the sheet 2 thereon, pressurizing and heating it in the state that a protrusion forming presser is operated from above. Thus, a surface layer of the material is formed in a smooth state, raw material supply needle is pierced into the surface layer of the material, then drawn to quantitatively adhere the material to an end of the needle, the end of the needle is opposed to the recess, the needle is lowered to bring the material to an inner periphery of the recess, then the needle is raised to transfer to charge the material in the recess. Since unnecessary adherence of fine protrusion forming resin 5 to the sheet 2 is not executed, a decrease in a product value is not introduced. In the case of application to a swimming suit, desired disordering and stratifying can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretchable garment material used as a garment for various sportswear, for example, and a method for producing the same. In a concavo-convex molded sheet that is provided with designability and other functionalities by providing fine projections, it is possible to form the fine projections into a desired shape without defects due to the presence of bubbles and the like at the time of manufacture. The present invention relates to a concavo-convex molded sheet capable of eliminating stains due to a raw material before curing such as squeegee marks, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, various sheet-like members have been subjected to unevenness processing on the surface of the above-mentioned sheet-like members in order to impart design properties and anti-slip properties and to improve mechanical strength such as tear strength. Various things have been proposed. The present applicant has filed a dozen or so applications including Japanese Patent Application No. 7-310128. In manufacturing uppers and soles for sports shoes, a nonwoven fabric using an intaglio or stencil is used. It discloses a structure in which a concave-convex pattern of a predetermined shape made of an elastomer is formed in close contact with a base sheet made of such a material, and a method of manufacturing the same.

[0003] On the other hand, recently, there has been appeared one that has been subjected to uneven processing on clothing such as various sportswear. Many of these are intended mainly to improve the design, and in the past, only flat patterns etc. could be applied to the surface of clothing by dyeing, weaving, differences in knitting, printing etc. In contrast to the above-mentioned construction mode, a new construction mode of adding a three-dimensional uneven pattern having a different clothing material and a different material is adopted. In addition, there is a women's swimsuit for swimming, which uses a concavo-convex pattern applied to clothing to impart functionality other than the above-described design.

In this apparatus, the turbulence generated by the stroke motion of the athlete's scratching hand, the impact on the water surface at the time of entering and exiting water, or the movement of the upper body and the body shape due to the breathing is made laminar and given to the athlete. It is applied to keep water resistance as low as possible. Specifically, the swimsuit for swimming is provided at the front breast, the back waist or the side lower part of the side part, the hip bone part, and the like. It is configured by arranging in a streak shape in the direction along the flow. In addition, as a conventional method of applying such minute projections to the cloth surface of a swimsuit for swimming, a method using foamed ink, a high-frequency welder, a method using injection molding and foam molding, and the like can be mentioned. However, microprojections having a desired shape and height could not be formed, and the appearance and performance of the swimsuit for swimming formed thereby were not necessarily sufficient.

[0005] Of these, in terms of performance, in the conventional women's swimsuit for swimming formed in this way, the adhesion area to the fabric is inevitably reduced due to the minute projections. The fixing power was weak, and there was concern that the toner might fall off due to peeling. This is also one of the factors that make it impossible to increase the height of the microprojections. To obtain a desired laminar flow conversion effect, the height of the microprojections should be set to 1 mm or more and several mm. It was not possible to provide a solution to solve this problem. Furthermore, when forming micro projections by such a method,
The weight increases due to the minute projections to be formed, which is not always sufficient in the field of use where weight reduction is required.

In recognition of such a background, the present applicant has filed an application in Japanese Patent Application No. 8-75132. The present invention
As shown in FIG. 1, in a sheet-like member formed by forming a plurality of minute projections 3 on one surface of a stretchable base sheet 2 to display a desired uneven pattern 4, the minute projections 3 are formed on the stretchable base sheet 2. And a micro-protrusion forming resin 5 made of a thermosetting resin or the like, and one of them is formed in close contact with the other inner surface shape. As a result, the bonding area is increased as compared with the conventional uneven molded sheet in which the minute projections 3 are only adhered to the stretchable base sheet 2 in a planar manner. Bonding is strengthened. Accordingly, the height of the minute projections 3 can be set high, and the problem has been solved.

[0007] However, even if such a method and measures are taken, there are stains generated on the stretchable base sheet 2 and defects generated on the minute projections 3, and there is still room for technical improvement in order to solve these. . First, regarding the dirt on the stretchable base sheet 2, when forming the micro projections 3, as shown in FIG. 15, a raw material before curing is applied to a concave portion 10 a ′ of a predetermined shape formed in a pattern on an intaglio 10 ′. Squeegee processing is performed by injecting P '. For this reason, the raw material P 'before curing remains on the surface of the intaglio 10' as traces of a squeegee, and this is transferred and formed as dirt on the stretchable base sheet 2 'together with the fine projection forming resin 5'. Looking at the loss of the microprojections 3 ',
In the case of molding the small projection 3 'having a small diameter, air is entrained when the raw material P' before curing is injected into the concave portion 10a 'or the like which is a mold of the small projection 3'. Let me do it. This is especially true for recesses 10
This was remarkable when the depth dimension was larger than the diameter dimension of a '. Further, when the raw material P 'before curing remaining on the surface of the intaglio 10' as traces of the squeegee is removed using a cloth impregnated with a solvent, if the solvent is not sufficiently dried,
This solvent is volatilized between the protrusion-forming pressing body and the concave portion 10a ', resulting in the occurrence of a defect.

When such a defective portion is formed in the upper part of the minute projection 3 ', it is not preferable in appearance, and when it is formed in the side peripheral portion (boundary portion with the stretchable base sheet 2'), the fixing strength is increased. And it is not preferable because it is easy to fall off.
Furthermore, these defective portions significantly reduce the turbulent laminar flow effect expected when the microprojections 3 'are applied to a swimsuit. Furthermore, in the injection of the raw material P 'before curing into the concave portions 10a' and the like by the squeegee process, it is difficult to equalize the amount of the raw material P 'before curing into the individual concave portions 10a'. Room was left.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above background and has been devised on the basis of the recognition. The present invention relates to a technique for forming minute projections on a fabric surface. A novel concavo-convex molded sheet that has attempted to solve the above-described problem by establishing a technique for injecting a raw material before curing into recesses and the like, in particular, based on a manufacturing technique for a concavo-convex molded sheet that has been cultivated by humans, and a method for producing the same Is proposed.

[0010]

In other words, the concavo-convex molded sheet according to claim 1 is a sheet-like member formed by forming a large number of fine projections on one surface of a stretchable base sheet to exhibit a desired concavo-convex pattern. The microprojections are constituted by a part of a stretchable base sheet and a microprojection forming resin made of a thermosetting resin or the like, and one of them is formed in close contact with the other inner surface shape. In this sheet-shaped member, this sheet-shaped member uses a stencil plate in which concave portions of a predetermined shape are formed in a pattern shape in advance or a stencil plate in which holes of a predetermined shape are formed in a pattern shape in advance. On the other hand, the raw material before hardening is injected, and then the elastic base sheet is placed above the raw material, and then pressurized and heated from above with the projection-forming pressing body acting thereon, thereby stretching. The microprojections are formed on one surface of the base material sheet. The injection of the raw material before curing into the concave portions or the holes is performed by first bringing the surface layer of the raw material before curing into a smooth state, and setting the raw material supply needle to the surface layer of the raw material before curing. Then, by pulling it out, the uncured raw material is fixedly attached to the tip of the raw material supply needle, and then the raw material supply needle is made to face the concave portion or the hole, and the raw material supply needle is lowered. Then, after the raw material in the form of a droplet is brought into contact with the bottom or wall of the concave portion or the hole, the raw material supply needle is raised and transfer-injected. ADVANTAGE OF THE INVENTION According to this invention, unnecessary adhesion of the raw material before hardening can be avoided by eliminating a squeegee trace, the fine protrusion forming resin bleeds into the stretchable base sheet due to the entrainment of air or the evaporation of the solvent, and the fine protrusions are lost. There is no reduction in product value. In addition, when the present invention is applied to a swimming suit for swimming, a desired turbulent laminar flow can be performed.

According to a second aspect of the present invention, there is provided a method of manufacturing a concavo-convex molded sheet, wherein an intaglio in which concave portions having a predetermined shape are formed in a pattern or a stencil in which holes having a predetermined shape are formed in a pattern is used. The uncured raw material is poured into the recesses or holes, and then a stretchable base sheet is placed thereon, and then pressurized and heated in a state in which a projection-forming pressing body is acted on from above. In the method for producing a concavo-convex molded sheet formed by forming a large number of microprojections that express a desired concavo-convex pattern on one surface of a base sheet, the injecting of the uncured raw material into the recesses or the holes is performed by first, before curing. The surface layer of the raw material is brought into a smooth state, and the raw material supply needle is inserted into the surface layer of the raw material before curing, and then pulled out, whereby the raw material before curing is fixedly attached to the tip of the raw material supply needle. Serial to face against concave or hole portion,
The method is characterized in that the raw material supply needle is lowered to bring the raw material in the form of a droplet into contact with the bottom or the wall of the concave portion or the hole, and then the raw material supply needle is raised and transferred and injected. According to the present invention, it is possible to inject the raw material before curing without entrapping air bubbles in the concave portions or the hole portions, and it is possible to obtain a concave-convex molded sheet having no fine protrusions. Also, when injecting the uncured raw material into the recesses or holes,
Since the squeegee processing performed by the conventional method can be eliminated, no squeegee traces are generated, and unnecessary adhesion of the fine protrusion forming resin to the stretchable base sheet is not caused, and wiping of the squeegee traces becomes unnecessary. Therefore, bleeding of the microprojection-forming resin into the stretchable base sheet and loss of the microprojections can be prevented. Furthermore, the amount of the raw material before curing attached to the individual raw material supply needles can be made equal, and as a result, the amount of the raw material before curing injected into the individual concave portions or holes is made uniform, so that a uniform amount is obtained. Small protrusions having a size can be formed.

According to a third aspect of the present invention, in addition to the requirement of the second aspect, a plurality of the raw material supply needles are arranged in a pattern similar to a concave portion in the intaglio or a hole in the stencil. Then, the raw material before curing is simultaneously injected into the plurality of recesses or holes. According to the present invention, the time for injecting the uncured raw material into the plurality of recesses or holes can be shortened, and the raw material injection step can be simplified.

[0013] Further, the method for producing a concavo-convex molded sheet according to claim 4 is the same as that of claim 2 or 3,
The smooth state of the surface layer of the raw material before curing is obtained by performing a squeegee treatment on the raw material before curing placed on a flat plate. According to the present invention, a smooth state of the surface layer of the raw material before curing can be easily and reliably obtained, and a fixed amount of the raw material before curing can be attached to the raw material supply needle.

According to a fifth aspect of the present invention, in addition to the requirements of the second, third, or fourth aspect, the raw material before curing is a thermosetting resin, and When obtaining a smooth state, the raw material before curing is cooled to inhibit the progress of curing. According to the present invention, the viscosity of the raw material before curing, which is a thermosetting resin, can be maintained, and the raw material before curing can be smoothly injected from the raw material supply needle into the concave portion or the hole. According to the inventions described in these claims, the above-mentioned problem is solved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an uneven molded sheet of the present invention and a method for producing the same will be specifically described with reference to the drawings. In the following description, the concavo-convex molded sheet 1 of the present invention and its use will first be described with reference to FIGS. The method for producing the uneven molded sheet will be described.

The uneven molded sheet 1 of the present invention can be used for various stretchable clothing materials such as racing suits for sports such as cycling, gloves, speed skating suits, and skis. Competition suits for competition alpine and Nordic events, swimsuits for competition, and the like. These focus on functional aspects such as reduction of fluid resistance and improvement of grip force, but if attention is paid to design, gymnastics,
It can be applied to women's leotards for rhythmic gymnastics, women's or men's leotards for aerobics and jazz dance, and if you focus on the functions such as reinforcement and support of fabric, baseball uniforms It can also be applied to undershirts, stockings, and various supporters. In addition, when attention is paid to the design, the present invention can be applied to the formation of a grain such as an impact-resistant wristwatch and its band.

The concavo-convex molded sheet 1 used for such an application basically has a desired concavo-convex pattern 4 formed by forming a large number of fine projections 3 on one surface of an elastic base sheet 2. Further, the minute projections 3 are constituted by a part of the stretchable base sheet 2 and a minute projection forming resin 5 made of a thermosetting resin or the like, and one of these is along the other inner surface shape. It is constituted by being formed in close contact. 1, 2 and 3
In the embodiment shown in FIG. 5A, the minute projections 3 are formed into a projection shape by the minute projection forming resin 5 arranged on the surface side, and the minute projections 3 are stretched along the inner surface shape of the minute projection forming resin 5. This shows a state in which a part of the base sheet 2 is made to enter and is adhered in a stretched state.

Hereinafter, the various members constituting the concavo-convex molded sheet 1 will be described more specifically. First, elastic base sheet 2
It is desired that the resin has excellent elasticity and has no restriction on the direction of expansion and contraction. Specifically, a knitted fabric or a nonwoven fabric that can meet such a requirement can be suitably applied, and the knitted fabric is selected from tricot, Russell, sheeting (flat knitting), milling (rubber knitting), smooth (double-sided knitting), and the like. It is preferable to use a knitted fabric having elasticity, in particular, tricots are easily available and easy to use, and as the material, natural fibers such as cotton, silk, and the like usually used for fabrics, nylon, and chemical fibers such as polyester are used. When the fabric is subjected to molding, it is preferable that thermoplastic synthetic fibers are mixed. And furthermore, the surface may be raised. As the nonwoven fabric, any of a papermaking type and a web type can be used, but a web type which is easy to cut and is light, and in which there is no particular fear of fraying, is preferable. Depending on the shape and the number of the minute projections 3 to be formed even in the case of a woven fabric, there are some which can meet the above-mentioned requirements, and of course such a material can be applied.

Next, the minute projection forming resin 5 formed of a thermosetting resin or the like will be described. Here, the thermosetting resin or the like refers to a rubber-like elastic body, and in the present invention, a polyurethane elastomer is used as an example. In addition to the use of a single thermosetting resin or the like, a combination of a plurality of properties is used when the microprojections 3 are formed by a plurality of microprojection elements 30 as described later. It is also possible. Examples of the properties used here include color, hardness, elasticity, abrasion resistance, resilience, vibration absorption, thickness, and weight.

The polyurethane elastomer is composed of a mixture of a prepolymer and a polyisocyanate, and is cured by heating. A preferable example is a non-solvent immediate hard urethane resin manufactured by Nippon Synthetic Chemical Industry Co., Ltd. For example, the trade name is Efretan. In addition, a solvent can be separately added to these to adjust viscosity and hardness. Examples of polyurethane elastomers include Nipporan (registered trademark) of Nippon Polyurethane Industry Co., Ltd., which is a prepolymer, and Pandex (registered trademark), which is a polyisocyanate of Dainippon Ink Co., Ltd. SX of Chemical Co., Ltd.
-320A & B or the like can be used. Further, in order to smoothly inject the uncured raw material P from the raw material supply needle 43 to the concave portion 10a or the hole portion 11a described later, a thickener can be mixed into these raw materials.

Still other thermosetting resins include, in addition to such polyurethane elastomers, other thermosetting resins such as silicone elastomer which is advantageous for skin contact, and photocuring which is cured in a short time by irradiation with ultraviolet rays. It is also possible to apply a conductive resin. Further, among such thermosetting resins and the like, Japanese Patent Application Laid-Open No.
It is also possible to add the luminous pigments disclosed in US Pat. No. -238702, and in this case, additional functions such as improvement in night visibility (safety) are added.

Next, the minute projections 3 constituted by a part of the stretchable base sheet 2 and the minute projection forming resin 5 are described.
Will be described. That is, a part of the stretchable base sheet 2 is stretched and deformed, and the stretched and deformed part is also used as a part of the minute projections 3 to increase the bonding area and reduce the amount of the minute projection forming resin 5 used. Thus, the overall weight of the uneven molded sheet 1 is reduced. Therefore, as long as such conditions are satisfied, various shapes,
The microprojections 3 having a structure can be adopted. As an example, FIG. 3A shows a microprojection 3 in which the microprojection forming resin 5 appears on the surface.

The minute projections 3 are provided with intaglio 10 described later.
This shows an embodiment of a somewhat elongated hollow shape in which the entirety of the fine projections 3 is formed by a curved surface. Further, the embodiment shown in FIG. 3B shows a minute projection 3 of a type in which a minute projection forming resin 5 appears on the surface, similarly to the minute projection 3 shown in FIG. The microprojections 3 are formed by using a stencil 11 described later, and show an embodiment in which the appearance of the microprojections 3 is formed in a flat cylindrical shape or a flat rectangular prism shape. Further, the embodiment shown in FIG. 3C shows a minute projection 3 of a type in which the minute projection forming resin 5 does not appear on the surface. The fine projections 3 are formed by using a molding concave mold 18 described later, and the appearance of the fine projections 3 is entirely curved as in the embodiment shown in FIG. 1 shows a configured hollow embodiment.

Further, it is also possible to form multi-stage or multi-layered minute projections 3 as shown in FIG. The stencil 11A and the stencil 11B are used as described later.
Is formed as an example by using two stencils 11 composed of a microprojection element 30A and a two-layer microprojection element 30 composed of a base-side microprojection element 30A and a surface-side microprojection element 30B. 1 shows a micro projection 3 configured. In this embodiment, the base-side microprojection element 30A is constituted by a part of the elastic base sheet 2 and the microprojection forming resin 5, while the front-side microprojection element 30B is formed by the microprojection forming resin 5A. The structure constituted only by the following is shown. Therefore, although there are some difficulties in terms of weight reduction of the concavo-convex molded sheet 1, it can be said that the microprojections 3 are extremely significant in diversifying the design.

Then, the uneven molded sheet 1 as described above
Is basically formed by forming a large number of such fine protrusions 3 on one surface of the stretchable base sheet 2. Specifically, a desired uneven pattern 4 is made to appear by devising the arrangement of a large number of microprojections 3, and whether the desired uneven pattern 4 focuses on designability or other It also depends on whether you focus on functionality. Incidentally, the embodiment shown in FIGS. 1 and 2 shows an uneven molded sheet 1 used in a women's swimsuit for swimming, in which a turbulent flow generated during use is made laminar to flow. The emphasis is on the functionality of reducing the resistance of water to water. The above-mentioned functionality is also related to the height of the minute projections 3. By forming the minute projections 3 as described above, it is possible to form the minute projections 3 having a height which was conventionally difficult to mold. It becomes possible to easily form the minute projections 3 of which the optimum is 1 mm or more and several mm. In general, such fine projections 3 exhibit this functionality by being formed in a large number as described above. However, there are applications where the functionality can be exhibited by forming only one or a few. For example, it is of course possible to adopt a configuration corresponding to such an application.

Depending on the degree of filling of the elastic base sheet 2, the viscosity of the microprojection forming resin 5 or the affinity of the microprojection forming resin 5 with the elastic base sheet 2, the microprojection forming resin 5 may be used. Although a part of the elastic base sheet 2 may seep to the back side, it may be cured in this state. In this case, the stretching deformation of the stretchable base sheet 2 is not as extreme as shown in the figure, because the deformation due to the small protrusion forming resin 5 oozing to the back side of the stretchable base sheet 2 may be mitigated.

Next, a description will be given of a method of manufacturing the concavo-convex molded sheet used for molding the above-mentioned concavo-convex molded sheet 1. The manufacturing process for carrying out the method for manufacturing a concavo-convex molded sheet according to the present invention includes a raw material preparation step 40, a raw material injection step 50, and a pressing and heating step 60 connected in series. First, the following (I) to (III) The raw material preparation step 40 commonly used in the manufacturing method will be described.

The raw material preparation step 40 includes a flat plate 41 having a horizontal upper surface, a squeegee device 42, a raw material supply needle 43 and a supply device 45, as shown in FIG. May be provided. The flat plate 41 is a plate-shaped member made of a material having a low thermal resistance such as an aluminum alloy, and has a smooth upper surface and a horizontal state, and further includes a cooling section 44a of a cooling device 44 therein. The cooling device 44 may be a circulating cooler that circulates a fluorine-based refrigerant such as chlorofluorocarbon gas or alternative chlorofluorocarbon gas or cold water in the cooling pipe to cool the outside of the pipe, or an electronic device using a thermoelectric cooling element utilizing the Peltier effect of semiconductors. A cooler or the like is applied. In the present embodiment, an electronic cooler having a small number of constituent members and easy maintenance is employed. This utilizes a phenomenon in which heat is absorbed or generated at a contact when a current is applied to a contact of a different kind of metal, and the metal plate on the cooling side is used as the cooling section 44a.

The squeegee device 42 uses a doctor blade as an example. Although not shown in detail, the squeegee device 42 is configured to be movable in a horizontal direction while keeping a constant distance from the surface of the flat plate 41 by a conventional method. .

The supply device 45 is a device for discharging the raw material P before curing, which is appropriately equipped with a nozzle, a pump and the like, and has a discharge portion of the nozzle facing the upper surface of the flat plate 41.

The raw material supply needle 43 is a member for holding the raw material P before curing to be injected into the concave portion 10a, as will be described later. The raw material supply needle 43 has an appropriate shape depending on the shape and capacity of the concave portion 10a and the viscosity of the raw material P before curing. The shape is selected. Specifically, the columnar shape shown in FIG.
(B) As shown in FIG. 4 (c), by removing a part of the side peripheral portion and the bottom portion of the cylinder, an attempt is made to increase the amount of the raw material P before curing held by the raw material supply needle 43, or as shown in FIG. As shown in the figure, the raw material P before curing is tapered downward.
Can be improved. As the material of the raw material supply needle 43, a synthetic resin such as a fluororesin, a metal, or the like may be adopted as in the intaglio 10 or the stencil 11 described later. A plurality of such raw material supply needles 43 are held on the substrate 43a in a state where a plurality of the raw material supply needles 43 are arranged in the same pattern as the hole portion 11a in the stencil 11 or the concave portion 10a in the intaglio plate 10, and the substrate 43a is not shown. However, it is held up and down freely by a lifting mechanism such as a cylinder. The unit including the raw material supply needle 43, the substrate 43a, and the elevating mechanism is provided with the intaglio 10 or the stencil 11 and the flat plate 41 in the raw material injection step 50 described later.
It is configured to be movable between.

The raw material preparation in the raw material preparing step 40 composed of the above-mentioned various members is performed by bringing the surface layer of the raw material P before curing into a planar state and projecting the raw material supply needle 43 from above to the surface layer of the raw material P before curing. By subsequently pulling it out, it means that the raw material P before curing is fixedly attached to the tip of the raw material supply needle 43. Hereinafter, an aspect of the raw material preparation in the raw material preparation step 40 will be described with reference to FIG. First, if a polyurethane elastomer is used as the raw material P before curing, if necessary, the cooling device 44 is turned on to activate the cooling section 44a to cool the flat plate 41 to an appropriate temperature that inhibits the progress of curing. In this state, the raw material P before curing is discharged by the supply device 45 as shown in FIG. The raw material P before curing means the above-mentioned raw material liquid of the thermosetting resin. When the polyurethane elastomer is put in one row, a static mixer or the like which is widely used in the industry is used. As shown in FIG. 6 (a), in addition to the method of mixing two liquids in a cylinder and introducing them from a nozzle, as shown in FIG. 6 (b), the two liquids of the raw material may be mixed and sprayed at the nozzle tip. It is possible, and if there is no particular need to consider mass production, it is also possible to stir these two liquids in a container and spray a mixture.

Next, as shown in FIG.
2, the raw material P before curing is dragged at the tip of the squeegee tool 42 in consideration of the surface tension, contact angle, wetting, and the like between the raw material P before curing and the flat plate 41 and the tip of the squeegee tool 42. It is stretched at a constant thickness and its surface layer is made flat. Subsequently, as shown in FIG. 5C, the raw material supply needle 43 is made to face above the raw material P before curing, and further, as shown in FIG.
Rush into the surface layer. Then, when the tip of the raw material supply needle 43 reaches the lowest point set in advance, the raw material supply needle 43 is raised, and is withdrawn from the surface layer of the raw material P before curing. At this time, since the raw material P before curing has an appropriate viscosity, FIG.
As shown in (e), it adheres to the tip of the raw material supply needle 43 in a drop shape. When the uncured raw material P is attached, the substrate 43a
By setting the individual raw material supply needles 43 arranged in the same manner to have the same material and the same shape, the raw material P before curing attached to the individual raw material supply needles 43 can be made the same. Of course, when a plurality of shapes of the minute projections 3 to be formed are mixed, the amount of the raw material P before curing may be adjusted by making the shape of the raw material supply needle 43 correspond to the shape of the minute projections 3. .

When the minute projections 3 having different properties (color, material, etc.) are formed on a single stretchable base sheet 2, the flat plate 41 is divided by a partition body, and the flat plate 41 of the raw material P before curing is formed. It is possible if the input to 41 is made different for each section. Furthermore, in order to clean the raw material supply needle 43 in preparation for the next raw material preparation, FIG.
The material supply needle 43 may be configured to be able to advance and retreat from the substrate 43a as shown in FIG.

Next, a raw material injection step 50 and a pressure heating step 6
0 will be described. Note that the raw material injection step 50 and the pressing and heating step 60 can take various aspects.
The description will be made in the following three modes. Specifically, FIG.
(I) A method for manufacturing an uneven printing sheet 1 having micro projections 3 as shown in (a) using an intaglio plate, and a method for manufacturing micro projections 3 as shown in FIG. (II) used for molding the uneven molded sheet 1 having
The manufacturing method using a stencil and the manufacturing method using a molded concave mold (III) used for molding the uneven molded sheet 1 having the fine projections 3 as shown in FIG. The three types of manufacturing methods will be roughly described.

(I) Manufacturing method using intaglio (see FIGS. 8 and 9) (i) Raw material injecting step (placement of intaglio, injection of raw material before curing (see FIG. 8)) The intaglio plate 10 in which the concave portions 10a of a predetermined shape are formed in a pattern is placed. The material constituting the intaglio 10 may be a relatively soft material such as silicone rubber, or a harder acrylic or
It may be a synthetic resin such as a fluororesin having excellent release properties, or a metal such as aluminum which is lightweight and has excellent thermal conductivity.
Of course, it is necessary to consider the compatibility with the pre-curing liquid raw material P which is a thermosetting resin, and when the releasability is poor, a release agent is spray-coated separately. To deal with. Also, for the metal,
Fluororesin dispersion plating in which a fluororesin is dispersed in the film may be performed.

Incidentally, a pressing and heating step 60 (pressing,
In consideration of problems such as deformation of the intaglio 10 during heating), it is desirable to form the intaglio 10 from a relatively hard material. The recess 10 in such an intaglio 10
The raw material P before curing is injected into a. Specifically, FIG.
As shown in FIG. 8A, the raw material supply needle 43 faces the upper side of the concave portion 10a, and further, as shown in FIG.
Is lowered, and the uncured raw material P attached to the tip is removed from the concave portion 10a.
Abut the bottom or wall of the Subsequently, the raw material supply needle 43 is moved up and withdrawn from the concave portion 10a. At this time, the raw material P before curing has an appropriate viscosity, and the area of contact between the raw material P before curing and the raw material supply needle 43, the raw material P before curing and the recess 10
The raw material P before curing is separated from the raw material supply needle 43 as shown in FIG. 8C and is transferred and injected into the concave portion 10a due to the tension generated by the difference from the contact area with the raw material P. In this way, since the required amount of the raw material P before curing is directly injected into each of the concave portions 10a, it is possible to avoid a situation in which the upper surface of the intaglio 10 or the like is inadvertently stained.

When a polyurethane elastomer is used as the thermosetting resin (raw material P before curing), the concave portion 1
The raw material P before curing in Oa is left at room temperature until it is in a semi-cured state. By the way, although it depends on the composition and amount of the raw material P before curing, a required time of about 10 minutes is required during this time.
Of course, it is also possible to shorten the time until semi-curing by slightly heating.

(Ii) Pressing / Heating Step (Placement of Stretchable Base Sheet, Pressing by Protrusion Forming Pressing Body, Pressing, Heating, and Stripping (See FIG. 9)) Thus, the raw material P before curing is in a semi-cured state. Then, the elastic base sheet 2 is placed on the upper surface of the intaglio 10. Next, the projection-forming pressing body 15 is acted from above to extend a part of the stretchable base sheet 2 to reach the concave portion 10a of the intaglio plate 10 and adhere to the semi-cured uncured raw material P in the concave portion 10a. . Hereinafter, this projection forming pressing body 15
Will be described. Basically, the configuration shown in FIG. 9 can be applied. In this configuration, a part of the projection-forming pressing body 15 is deformed with pressurization, and the deformed pressing portion 16 which is the deformed portion is deformed. With a part of the elastic base sheet 2,
It enters into the concave portion 10a, expands the stretchable base sheet 2 by the pressing action, and makes the stretchable base sheet 2 adhere to the pre-cured raw material P in a semi-cured state. By the way, when a silicone gel made porous by an elution method is used as the protrusion forming pressing body 15, it has appropriate elasticity, deformability, strength, and air permeability, so that the small recess 10a
Alternatively, even a hole 11a to be described later smoothly enters so as to follow the inner surface shape thereof and exerts a good pressing force. Furthermore, it has a property that it is difficult to adhere to the raw material P before curing, so that it has excellent releasability and can withstand repeated use.

As such a projection forming pressing body 15,
For example, a foamed silicone gel obtained by making a silicone gel porous can be used. Here, if such will be described in detail silicone gel, the diorganopolysiloxane (hereinafter referred to component A) RR ¹ ₂ this compound represented by the following formula [1]
_{^{SiO- (R 2 2 SiO) nSiR}} 1 2 R ... [1] [ wherein, R is an alkenyl group, R ¹ is a monovalent hydrocarbon group having no aliphatic unsaturated bond, R ² one Aliphatic hydrocarbon group (at least 50 mol% of R ² )
Is a methyl group, and when it has an alkenyl group, its content is 10 mol% or less), and n is a number such that the viscosity of this component at 25 ° C. becomes 100 to 100,000 cSt.] Viscosity at 25 ° C of 500
0 cSt or less, and at least two Si atoms per molecule.
An organohydrogenpolysiloxane having a hydrogen atom directly bonded to an atom (component B), and an alkenyl group contained in the component A based on the total amount of hydrogen atoms directly bonded to Si atoms in the component B Is an addition reaction type silicone polymer obtained by curing a mixture adjusted so that the ratio (molar ratio) of the total amount thereof becomes 0.1 to 2.0.

The silicone gel will be described in more detail. The above component A has a linear molecular structure, and alkenyl groups R at both ends of the molecule are added to hydrogen atoms directly bonded to Si atoms in the component B. Is a compound capable of forming a cross-linked structure. The alkenyl group present at the molecular terminal is preferably a lower alkenyl group,
A vinyl group is particularly preferred in consideration of reactivity.

R ¹ present at the molecular terminal is a monovalent hydrocarbon group having no aliphatic unsaturated bond, and specific examples of such a group include methyl, propyl and hexyl groups. Alkyl group, phenyl group and fluoroalkyl group.

In the above formula [1], R ² is a monovalent aliphatic hydrocarbon. Specific examples of such a group include an alkyl group such as a methyl group, a propyl group and a hexyl group, and a vinyl group. Lower alkenyl groups such as groups can be mentioned. However, at least 50 mol% of R ²
Is a methyl group, and when R ² is an alkenyl group, the amount of the alkenyl group is preferably 10 mol% or less. When the amount of the alkenyl group exceeds 10 mol%, the crosslinking density becomes too high and the viscosity tends to be high. And n is
The viscosity of the component A at 25 ° C. is usually 100 to 10
0000 cSt, preferably 200 to 20000 cSt
Is set to be within the range.

The component B is a crosslinking agent for the component A,
The hydrogen atom directly bonded to the i atom is added to the alkenyl group in the component A to cure the component A. The B component may have any of the above-mentioned effects, and may have various molecular structures such as a linear, branched chain, cyclic, or network structure.

In addition, a hydrogen atom and an organic group are bonded to the Si atom in the component B, and this organic group is usually a lower alkyl group such as a methyl group. Furthermore, 25 of the B component
The viscosity at ° C is usually 5,000 cSt or less, preferably 500 cSt or less. Examples of such a component B include organohydrogenpolysiloxanes whose molecular ends are blocked with triorganosiloxy groups, copolymers of diorganosiloxanes and organohydrogensiloxanes, and tetraorganotetrahydrogencyclotetrasiloxanes. copolymer siloxane consisting of HR ¹ ₂ SiO 1/2 units and SiO 4/2 units, and HR ¹ ₂ SiO 1
/ Can be mentioned copolymers polysiloxane composed of 2 units and R ¹ ₃ SiO 1/2 units and SiO 4/2 units. However, in the above formula, R ¹ has the same meaning as described above.

The ratio of the total molar amount of alkenyl groups in component A to the total molar amount of hydrogen atoms directly bonded to Si in component B is usually 0.1 to 2.0,
Preferably, it is produced by mixing and curing the A component and the B component so as to be in the range of 0.1 to 1.0.

The curing reaction in this case is usually performed using a catalyst. As the catalyst used herein, a platinum-based catalyst is preferable. Examples of the catalyst include finely pulverized elemental platinum, chloroplatinic acid, platinum oxide, a complex salt of platinum and olefin, platinum alcoholate, and chloroplatinic acid and vinylsiloxane acid. And complex salts thereof. Such a complex salt is used in an amount of usually 0.1 ppm or more, preferably 0.5 ppm or more, based on the total weight of the A component and the B component. The upper limit of the amount of such a catalyst is not particularly limited. For example, when the catalyst is in a liquid state or can be used as a solution, 200 pp
m or less is sufficient.

The above-mentioned component A, component B and the catalyst are mixed and cured at room temperature or by heating to produce the silicone gel used in the present invention. The silicone gel thus obtained is JIS
The penetration measured by K (K-2207-198050 g load) is usually 5 to 250, and JIS-K222
The consistency defined as 0 is between 5 and 200. The hardness of such a silicone gel varies depending on the crosslinked structure formed by the above-mentioned component A and component B.

The viscosity of the silicone gel before curing and the penetration after the curing are determined by using a silicone oil having methyl groups at both ends in 5 to 75% by weight based on the obtained silicone gel.
Can be adjusted by adding in advance in an amount within the range described above. As described above, the silicone gel can be adjusted as described above, or a commercially available silicone gel can be used.

As the foamed silicone gel obtained by making the silicone gel porous, sodium chloride is added as a foaming medium to the silicone gel, the foam is cured in a foamed state, and sodium chloride is further dissolved in a solvent. A material formed in a porous shape by eluting the compound can be applied as an example. Of course, silicone rubber, millable silicone rubber, and other foams may be used, but the pressing property (deforms well and provides a good pressing action), strength (repeated use), air permeability (microprojection surface) Do not create a defect due to residual air)
Select and use a material having excellent releasability (smooth deprinting is performed). When a silicone elastomer is used as the raw material P before curing, it is preferable to use a fluororesin-based (non-silicon-based) release agent spray-coated on the projection-forming pressing body 15.

Further, by deforming its own shape in this way, in addition to the projection-forming pressing body 15 that performs a pressing action,
FIG. 11 discloses a method disclosed in Japanese Patent Application No. 8-75132, entitled "Unevenly Molded Sheet and Manufacturing Method Thereof", filed by the present applicant.
As shown in FIG. 11A, the protrusion-forming pressing body 15 on which the fixed pressing portion 17 is formed from the beginning may be used.
As shown in (b), for example, a bullet-shaped movable pressing piece 17A may be slidably fitted to a flat pressing body body. In addition, as shown in FIG. 11 (c), a bump-shaped elastic pressing portion 16A is provided on the flat pressing body main portion, and when pressed, elastically deforms downward by the elastic force thereof, whereby the pressing action is performed. It is also possible to use the projection-forming pressing body 15 having the configuration described above. FIG. 11
As shown in (d), the space on the upper surface of the stretchable base sheet 2 is sealed, a fluid such as air A is supplied into this space, and a pressure action is performed by increasing the pressure in the space. It is, of course, possible to adopt the projection-forming pressing body 15 having such a configuration.

The semi-cured raw material P and the stretchable base sheet 2 in the semi-cured state in which the projection forming pressing body 15 is acted on are appropriately weighted from above as an example as shown in FIG. 9B. W and the like are pressed to exert the pressing action of the protrusion forming pressing body 15, and the material P is heated from above and below to cure the raw material P before curing, thereby forming fine protrusions on a part of the surface of the stretchable base sheet 2. The resin 5 is formed in close contact. By the way, the heating temperature at this time is about 70 ° C to one hundred and several tens ° C.
Since the temperature may be relatively low, there is no problem of deformation or discoloration of the stretchable base sheet 2. The time required for pressurization and heating varies depending on the composition and amount of the raw material P before curing, the curing state in the previous step, and the like.
It takes about 5 minutes. Then, as shown in FIG.
When the heating state is released and the formed concavo-convex formed sheet 1 is taken out from the intaglio 10, a series of steps of the present manufacturing method using the intaglio 10 is completed.

(II) Manufacturing method using stencil (see FIG. 12) (i) Raw material injection step (placement of bottom stencil and stencil, injection of raw material before curing (see FIGS. 8, 10 and 12 (a)) Next, in place of the intaglio plate 10, a method of mounting a plate-shaped bottom plate 12 on a base B and a stencil 11 having a hole 11 a of a predetermined shape previously formed thereon will be described.
Here, the bottom plate 12 and the stencil 1 used in the present manufacturing method
1 and an example of a method of creating the same will be described.
The bottom plate 12 and the stencil 11 are, for example, 0.1 mm. It is made of an iron plate having a thickness of about several mm to several mm.
1, a hole 11 a of a predetermined shape is engraved in a pattern in accordance with the shape and layout of the minute projections 3 to be further molded, ie, the concavo-convex pattern 4, on the iron plate. Made up of In addition, the thickness of the bottom plate 12 and the stencil plate 11 is 0. The bottom plate 12 and the stencil 1 having a thickness of several mm can be appropriately selected within a range of several mm to several mm.
1 is created, for example, when A plurality of thin plates having a thickness of several mm are prepared (after the stencil 11 is further covered with protective films on the front and back surfaces of these thin plates, respectively, and etched from both sides to form holes 11a in the respective thin plates). An adhesive capable of forming a hard adhesive layer, such as an epoxy adhesive, is applied between these thin plates, and the thin plates are laminated to form a bottom plate 12 and a stencil 1 having a thickness of several mm.
1 may be created.

On the other hand, the surface of the bottom stencil 12 on the side of adhesion with the stencil 11 may be one having a smooth mirror-like surface finish, but one having a matte finish, one having a rough finish on its surface, It is also possible to perform a concavo-convex treatment on a pattern formed by a method such as etching. By the way, in the case where such a concavo-convex treatment is performed, it is possible to impart a design property to the end face of the minute projection forming resin 5 in the minute projection 3 to be molded. Further, it is desirable that a guide hole 13 is formed in such a bottom plate 12 and a stencil 11. If such a guide hole 13 is provided, the bottom plate 12 and the stencil 11 can be correctly adjusted by using the guide hole 13. It can contribute to the prevention of misalignment when placed at a position or when a plurality of stencils 11 are used.

Another method of forming the hole 11a in the stencil 11 is disclosed in Japanese Patent Application Laid-Open No. H6-62, filed by the present applicant.
No. 908, "Method of manufacturing embossed sheet",
No. 26845, “Method for Manufacturing Embossed Sheet” and the like, a method using a master mold, a method using a photocurable resin film, a method using sandblasting, a metal plate, a resin plate and the like, wire cutting, laser, punching, Various methods can be employed, such as a method of forming the stencil 11 by forming the hole 11a by a method such as pressing. Further, when placing the stencil 11 thus prepared on the base B on which the bottom stencil 12 is placed,
Base B, as disclosed in Japanese Patent Application No. 8-75132 “Rough-formed sheet and method for producing the same” by the present applicant.
Between the stencil and the stencil 12, the adhesion between the stencil 12 and the stencil 11, and the stencil 1 when a plurality of stencils 11 are used in an overlapping manner.
It is necessary to devise a method for improving the adhesion between the two.

The raw material P before curing is injected into the holes 11a in the same manner as in the above-mentioned (I) manufacturing method in the case of using an intaglio. When the stencil 11 is used as described above, it is possible to use a plurality of stencils 11 as shown in FIG. 13. A description will be given of the work procedure. (A) Molding of Surface-Side Microprojection Element First, the bottom plate 12 is placed on the base B, and the surface-side stencil 11B is placed thereon, and brought into close contact with the base B by the above-mentioned means such as magnetic force. Fix it. And the front side stencil 1
The raw material P before curing is injected into the hole 11a of 1B. The portion formed by the front side stencil 11B becomes the front side minute projection element 30B.

(B) Forming the base side microprojection element Next, the base side stencil 11A is placed on the surface side stencil 11B by using the guide hole 13 as a guide, and the base B is formed on the base B by means of the above-described magnetic force or the like. The bottom plate 12 and the front side stencil 11
B, and fix the base side stencil 11A in a tightly contacted state. The raw material P having the same composition as the raw material P before curing or a composition different from that of the raw material P before curing is injected into the holes 11a of the base-side stencil 11A. In this case,
When the pre-curing raw material P having a composition different from that of the pre-curing raw material P is injected, the pre-curing raw material P is hardened to some extent, and is not mixed with the pre-curing raw material P having a different composition to be injected. After confirming that it is done, if necessary, leave it at room temperature until it becomes a semi-cured state. The portion formed by the base side stencil 11A becomes a part of the base side minute projection element 30A. According to the present invention, the front-side stencil 11B and the base-side stencil 11A are fixed on the bottom stencil 12 in advance in close contact with each other.
Can also be implanted.

As described above, when a plurality of stencils 11 are used, the diameter of the hole 11a differs, so that a plurality of diameters of the raw material supply needles 43 are prepared in accordance with the diameter of the hole 11a. A plurality of substrates 43a holding the supply needles 43 can be prepared.

(Ii) Pressing and Heating Steps (Placement of Stretchable Base Sheet, Pressing with a Protrusion Forming Press, Pressing, Heating, and Plate Removal (see FIG. 12)) The stretchable base sheet 2 is placed in the same procedure as in the case of the manufacturing method, and pressurized and heated in a state where the protrusion forming pressing body 15 is actuated to form the fine protrusions 3 on the surface of the stretchable base sheet 2; Thereafter, the concavo-convex molded sheet 1 formed by releasing the pressurized and heated states is put into a stencil 1
If it is taken out from No. 1, a series of steps of the present manufacturing method using the stencil 11 is completed.

(III) Manufacturing method using molded concave mold (see FIG. 14) (i) Raw material injecting step (fixing of elastic base sheet, formation of forming guide recess, injection of raw material before curing (FIG. 14 ( a) (b)
(Refer to (c)))) The stretchable base sheet 2 is placed on the molding recess 18 in which the molding recesses 18a having a predetermined shape are formed in a pattern in advance, and the periphery thereof is fixed to the molding recess 18. Next, FIG.
As shown in FIG. 4B, the primary forming convex 19 is acted from above, and a part of the elastic base sheet 2 is extended by the concave forming convex 19a protruding downward, thereby forming the forming guide concave 6. Form. In the case where the deformed state cannot be maintained only by the pressing action of the primary molding convex 19 and immediately returns to the original shape, pressing is performed while heating or the depression forming convex 19a is further heated. Appropriate measures can be taken, such as using a protruding material and shaping the shape to a state close to the shape of the minute projection 3 to be formed. If the outflow of the raw material P before curing from the mesh or the like of the stretchable base sheet 2 poses a problem, the surface of the stretchable base sheet 2 is appropriately coated. Next, the raw material P before curing is injected into the forming guide recess 6 by a tension caused by a difference between a contact area between the raw material P before curing and the forming guide concave portion 6, and is left until a semi-cured state is reached.

(Ii) Pressing and Heating Steps (Pressing, Heating and Release (See FIGS. 14 (d) and (e))) Next, the secondary molding convex mold 20 is placed on the forming guide recess 6 from above. The projection-forming projection 2 which is made to act and protrude downward
The portion of the forming guide recess 6 is pressed downward by Oa, and the stretchable base sheet 2 in this portion is further extended. Then, while maintaining such a pressurized state, heating is performed to cure the raw material P before curing to form a fine protrusion forming resin 5. When the fine protrusions 3 are formed on the stretchable base sheet 2, The heating is released, and the formed concavo-convex sheet 1 is released from the formed concave mold 18.

[0062]

The concavo-convex molded sheet of the present invention and the method for producing the same are realized as an example through the above-described embodiments, and the following various effects are exhibited. That is, in the method of manufacturing the concavo-convex molded sheet of the present invention, the amount of the uncured raw material P adhered to the individual raw material supply needles 43 can be made equal, and as a result, the individual concave portions 10a or the hole portions 11a By making the amount of the uncured raw material P injected equal, the shapes of the minute projections 3 can be made the same. Further, when the raw material P before curing is injected into the concave portion 10a or the hole portion 11a, no air bubbles are involved. Further, the raw material P before curing is transferred to the concave portion 10a or the hole portion 11a.
Since the squeegee processing that has been performed by the conventional method can be eliminated when injecting into the a, the unnecessary adhesion of the microprojection forming resin 5 to the stretchable base sheet 2 does not occur.

For this reason, it is possible to eliminate dirt due to traces of squeegees and to eliminate defects of the fine projections 3 due to entrainment of air, etc.
Can be formed. Further, the raw material P before curing can be simultaneously injected into a plurality of recesses or holes, and the process can be simplified. In addition, a smooth state of the surface layer of the raw material P before curing can be easily and reliably obtained, and the raw material supply needle 4 can be obtained.
3 can be quantitatively attached. Further, the viscosity of the raw material P before curing, which is a thermosetting resin, can be maintained, and the raw material P before curing can be smoothly injected from the raw material supply needle 43 into the concave portion 10a or the hole portion 11a. And raw material preparation process 4
By simply adding 0, the existing technique for producing a concavo-convex molded sheet by the present applicant can be used almost as it is, and the concavo-convex molded sheet 1 having a desired shape and functionality can be produced.

The irregularly formed sheet 1 manufactured in this manner has no unnecessary adhesion of the fine protrusion forming resin 5 to the stretchable base sheet 2 and the fixing strength of the fine protrusions 3 to the stretchable base sheet 2. , The product value does not decrease. In addition, when the present invention is applied to a swimming suit for swimming, a desired turbulent laminar flow can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a concavo-convex molded sheet manufactured according to the present invention in which minute projections are enlarged.

FIG. 2 is a plan view showing the same, an enlarged plan view of the fine projections, and a longitudinal side view of the fine projections.

FIG. 3 is a longitudinal sectional side view showing three types of embodiments in which the shape or configuration of a minute projection is different.

FIG. 4 is a perspective view showing four types of embodiments in which the shape or configuration of a raw material supply needle is different.

FIG. 5 is a side view showing an operation state of a raw material preparation step in a stepwise manner.

FIG. 6 is a side view showing two types of charging methods of a raw material before curing.

FIG. 7 is a longitudinal sectional side view showing an embodiment of a raw material supply needle which can be advanced and retracted from the surface of the substrate.

FIG. 8 is a side view showing the operation state of the raw material injection step in a stepwise manner.

FIG. 9 is a vertical sectional side view showing a process from placing of the stretchable base sheet to release of the plate.

FIG. 10 is a perspective view showing a bottom stencil and a stencil used in the method for producing a concavo-convex molded sheet of the present invention.

FIG. 11 is a longitudinal sectional side view showing another four types of embodiments having different configurations of the projection forming pressing body.

FIG. 12 is an explanatory view showing step by step a series of steps of a method of manufacturing a concavo-convex molded sheet when a stencil is used.

FIG. 13 is a vertical cross-sectional side view showing a working state in the process of forming a multi-step minute projection.

FIG. 14 is an explanatory view showing a method of manufacturing a concave-convex molded sheet when a molded concave mold is used, and showing a series of steps in a case where two types of molded convex molds are used.

FIG. 15 is a longitudinal side view showing a state where a raw material before hardening is injected by squeezing into a concave portion and a state where air bubbles are entrained, and a plane showing a state where a squeegee mark has adhered to an uneven molded sheet. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concavo-convex molded sheet 2 Elastic base sheet 3 Micro projections 4 Concavo-convex pattern 5 Micro-protrusion forming resin 6 Forming guide recess 10 Intaglio 10a Depression 11 Stencil 11A Base stencil 11B Surface stencil 11a Hole 12 Bottom plate 13 Guide hole 15 Protrusion formation Pressing body 16 Deformation pressing section 16A Elastic pressing section 17 Fixed pressing section 17A Movable pressing piece 18 Molding concave section 18a Molding concave section 19 Primary forming convex section 19a Depression forming section 20 Secondary forming convex section 20a Projection forming section 30 Microprojection element 30A Base-side microprojection element 30B Surface-side microprojection element 40 Raw material preparation step 41 Flat plate 42 Squeegee tool 43 Raw material supply needle 43a Substrate 44 Cooling unit 44a Cooling unit 45 Supply unit 50 Raw material injection step 60 Press heating step A Air B base P Raw material before curing W Weight

Claims (5)

[Claims] 1. A sheet-like member formed by forming a plurality of fine projections on one surface of a stretchable base sheet to express a desired uneven pattern, wherein the fine protrusions are a part of the stretchable base sheet, A sheet-like member made of thermosetting resin or the like, and one of them is formed in close contact with the other inner surface shape. Using a stencil in which the concave portion is formed in a pattern or a stencil in which holes of a predetermined shape are formed in a pattern in advance,
The uncured raw material is injected into these recesses or holes, and thereafter, a stretchable base sheet is placed thereon, and then pressurized and heated in a state where a projection-forming pressing body is acted on from above,
Thereby, minute projections are formed on one surface of the stretchable base sheet. The injection of the raw material before curing into the recesses or the holes is performed by first bringing the surface layer of the raw material before curing into a smooth state, and setting the raw material supply needles before curing. After the raw material is inserted into the surface layer and pulled out, the raw material before curing is fixedly adhered to the tip of the raw material supply needle, and then the raw material supply needle is made to face the concave portion or the hole, and the raw material supply needle is exposed. After lowering the needle to bring the uncured raw material into contact with the bottom or wall of the recess or hole,
A concavo-convex molded sheet, wherein the raw material supply needle is raised and transfer-injected. 2. Using an intaglio in which recesses of a predetermined shape are formed in a pattern or a stencil in which holes of a predetermined shape are formed in a pattern, and injecting a raw material before curing into these recesses or holes. After that, the elastic base sheet is placed above the base sheet, and then pressurized and heated in a state where the protrusion forming pressing body is acted from above, thereby displaying a desired uneven pattern on one side of the elastic base sheet. In the method for producing a concavo-convex molded sheet formed by forming a large number of microprojections, the injection of the raw material before curing into the concave portions or the holes is performed by first bringing the surface layer of the raw material before curing into a smooth state, and setting the raw material supply needle. After rushing into the surface layer of the raw material before curing, by withdrawing the raw material, the raw material before curing is fixedly attached to the distal end of the raw material supply needle, and then the distal end of the raw material supply needle is made to face the concave portion or the hole. Raw material supply A method for producing a concavo-convex molded sheet, comprising lowering a needle to contact a droplet-shaped raw material before curing with a bottom or a wall of a concave portion or a hole portion, and then raising and transferring and transferring the raw material supply needle. 3. A plurality of the raw material supply needles are arranged in a pattern similar to a concave portion in the intaglio or a hole in the stencil, and simultaneously inject the raw material before curing into the plurality of concave portions or the hole. The method for producing a concavo-convex molded sheet according to claim 2, characterized in that: 4. The method according to claim 2, wherein the uncured material surface layer is obtained by squeezing the uncured material positioned on a flat plate. 5. The raw material before curing is a thermosetting resin,
The method according to claim 2, 3 or 4, wherein when the surface layer of the raw material before curing is obtained, the raw material before curing is cooled to inhibit the progress of curing.