JP6160319B2 - Molded body, method for manufacturing molded body, and stamper - Google Patents

Description

  The present invention relates to a molded body, a method for manufacturing a molded body, and a stamper, and in particular, a molded body having a surface structure having a tumbling property against droplets, a method for manufacturing the same, and a stamper used for manufacturing the molded body. About.

Conventionally, pouring containers for storing soy sauce and sauces have a spout lip that is outwardly expanded and curved on the inner plug, improving liquid drainage and preventing dripping Has been given.
In recent years, various techniques using liquid repellency by a fine uneven structure or a double uneven structure have been proposed.

  For example, Patent Document 1 discloses a pouring container including an inner stopper provided with a fitting tube, a screw tube, and a pouring tube, and a cap provided with a top wall and a side tube wall. The pour cylinder of the pour container is formed with a pour spout lip that expands outward and curves at the periphery of the upper end.

  Further, in Patent Document 2, a flat film check nozzle that projects a check function when a liquid material is interposed between overlapping plastic films is projected on one edge of a packaging bag body made of a soft laminated film. A flexible packaging bag is disclosed. In this flexible packaging bag, a linear or curved substantially continuous uneven structure is imparted to the non-sealed portion of the laminated film.

  Patent Document 3 discloses a nozzle having a coating outlet for coating a stored liquid such as an adhesive, and a liquid path for introducing the liquid into the coating outlet, on the surface of the liquid path. A nozzle with fine irregularities is disclosed.

  Moreover, in patent document 4, the 1st uneven | corrugated shape which raises the brightness | luminance of the light from a back surface is formed in the surface of the transparent material which consists of a transparent plastic film, On the surface in which this 1st uneven | corrugated shape was formed, A thin layer made of a low surface energy substance having water repellency is laminated, and a second concavo-convex shape having a surface roughness smaller than the first concavo-convex shape is formed on the surface of the thin layer. A water repellent and high brightness transparent material is disclosed.

  Moreover, in patent document 5, while forming the uneven | corrugated shape of the height H = 10-100 micrometers on the surface of a metal plate so that the uneven | corrugated area ratio per unit area may be in the range of 9: 1-5: 5. A metal plate is disclosed in which fine irregularities having a ten-point average roughness Rz = 5 to 50 μm, preferably 5 to 15 μm, are formed on the surface of the irregular-shaped convex portion.

JP 2000-203619 A JP 2010-95272 A JP 2007-330839 A JP 2003-1736 A JP 2007-152370 A

However, the pouring container for storing soy sauce or sauce shown in the above-mentioned Patent Document 1 is almost completely prevented from dripping immediately after opening by the lip portion that is expanded outward and curved. During use, liquid drainage may decrease and dripping may occur. When the dripping liquid, that is, a part of the content liquid adheres to the inner plug or the cap and solidifies, the clean feeling is impaired and the user may feel uncomfortable.
For this reason, establishment of a technique for preventing dripping more completely has been demanded.
In addition, technologies that can improve the drop-off properties of droplets (that is, basic technologies) are used in various applications in which it is desired to avoid the state of liquid adhesion, for example, icing prevention technologies such as wings, and icicles. Since it can be applied to technology, it has been desired to establish it.
In addition, although said patent document 2-5 is a technique which has uneven | corrugated shape, it was a technique which cannot respond to said request.

  The present invention has been proposed in view of the above circumstances, and a molded body having a surface structure capable of improving the tumbling property with respect to the droplets and the repeated tumbling property with respect to the droplets, and a production method thereof, and It aims at providing the stamper used for manufacture of the said molded object.

In order to achieve the above object, the molded article of the present invention is a molded article having a surface structure made of plastic or glass having a tumbling property with respect to droplets, wherein the surface structure has an uneven shape, and the unevenness At least part of the surface shape, the uneven shape has a smaller auxiliary irregularities, the irregularities and the portion of the supplementary irregularities, made of the same molding plastic material or glass material, and wherein The ratio k (= E _IT / E _IT0 ) between the indentation Young's modulus (E _IT ) of the portion where the surface structure is molded and the indentation Young's modulus (E _IT0 ) of the portion where the surface structure is not molded , 1.10 or less, the uneven shape has a plurality of convex portions and concave portions alternately arranged at regular intervals, and the convex portion has an elongated top surface in the width direction of the top surface. Along Cross-sectional shape is substantially rectangular, the concave portion is formed by the convex portion adjacent said a cross-sectional shape along the width direction of the top surface substantially rectangular, the area ratio phi _s1 of the irregularities 0.001 ≦ φ _s1 ≦ 0.50, and the gap g _{1 of the} uneven shape is 1 μm ≦ g ₁ ≦ 300 μm, and the average area ratio φ _s2 of the auxiliary uneven shape is 0.001. ≦ φ _s2 ≦ 0.80, or the average unevenness r of the auxiliary uneven shape is 3.5 ≦ r ≦ 20.0 .
Further, the molded body of the present invention is a molded body having a plastic or glass surface structure having a drop-off property with respect to droplets, wherein the surface structure has an uneven shape, and the surface of the uneven surface is At least a part has an auxiliary concave-convex shape smaller than the concave-convex shape, the concave-convex shape and the auxiliary concave-convex shape portion are made of the same molding plastic material or glass material, and the surface structure is molded. The ratio k (= E _IT / E _IT0 ) between the indentation Young's modulus (E _IT ) of the formed portion and the indentation Young's modulus (E _IT0 ) of the portion where the surface structure is not formed is 1.10 or less And the molded body is a cap, an inner plug, a spout or a nozzle for flowing a liquid.

  In addition, the method for producing a molded body of the present invention uses the stamper on which a shaping surface corresponding to the concavo-convex shape of the molded body and an auxiliary concavo-convex shape smaller than the concavo-convex shape is formed, and the concavo-convex shape And a transfer step of forming the auxiliary uneven shape.

  Further, the stamper of the present invention is a stamper in which a shaping surface corresponding to a concavo-convex shape of a molded body and an auxiliary concavo-convex shape smaller than the concavo-convex shape is formed, and the blasting process is performed on the shaping surface of the stamper or the master The shape corresponding to the auxiliary uneven shape of the molded body is formed by dry etching processing or wet etching processing.

According to the molded article of the present invention, it is possible to greatly improve the falling property for droplets and the repeated falling property for droplets. Further, when this molded body is applied to, for example, an inner stopper of a dispensing container that stores liquid, dripping can be prevented almost permanently.
Further, according to the method for producing a molded article of the present invention, the above-mentioned molded article can be produced easily and in a short time, so that productivity and the like can be improved.
Furthermore, since the stamper of the present invention can be easily manufactured and the nano-order irregularities can be controlled, the manufacturing cost can be reduced, and the fallability of the molded body can be improved.

FIG. 1 is a schematic enlarged cross-sectional view of a main part of a molded body according to the first embodiment of the present invention. FIG. 2 shows a schematic enlarged cross-sectional view of a main part of a molded body according to an application example of the first embodiment of the present invention. FIG. 3: has shown schematic expanded sectional drawing of the principal part of the molded object concerning the modification of 1st embodiment of this invention. FIG. 4 is a schematic diagram for explaining the auxiliary uneven shape of the molded body according to the first embodiment of the present invention, and shows a roughness curve. FIGS. 5A and 5B are schematic diagrams for explaining the apparent contact angle of a droplet. FIG. 5A is a cross-sectional view of a Wenzel mode, and FIG. 5B is a cross-sectional view of a Cassie mode. FIG. 6 is a schematic diagram for explaining the simulation of the molded body according to the first embodiment of the present invention, in which (a) shows a graph of θ _E = 94 °, and (b) shows θ _E = 105 °. The graph is shown. FIG. 7 is a schematic diagram for explaining the simulation of the auxiliary uneven shape of the molded body according to the first embodiment of the present invention, in which (a) shows a graph in Cassie mode, and (b) shows in Wenzel mode. The graph is shown. FIG. 8 shows a graph in which the area ratio φ _s1 and the apparent contact angle θ ^* regarding the concavo-convex shape at the initial contact angle θ _E = 105 ° are derived from the equation (2). FIG. 9 shows a graph of the relationship between the gap amount of the concavo-convex shape of the molded body and the droplet height according to the first embodiment of the present invention. FIG. 10: has shown schematic sectional drawing for demonstrating the molded object concerning 2nd embodiment of this invention. FIG. 11: has shown schematic sectional drawing for demonstrating the manufacturing method of the molded object concerning one Embodiment of this invention. FIG. 12 is a schematic enlarged cross-sectional view of the main part of the stamper according to one embodiment of the present invention. FIG. 13 is a schematic diagram for explaining an auxiliary uneven shape of a stamper according to an embodiment of the present invention, and shows a roughness curve. FIG. 14 shows Table 1: Molding conditions of Examples, Comparative Examples and Reference Examples of the present invention. FIG. 15 shows Table 2: Evaluation results of Examples, Comparative Examples and Reference Examples of the present invention.

[First embodiment of molded body]
In FIG. 1, a molded body 1 of the present embodiment has a plastic surface structure that has a drop-off property with respect to a droplet (not shown).
Here, the molded body means an object manufactured in a predetermined shape by compression molding or injection molding using a mold. In addition, the predetermined shape is not particularly limited, and may be a special shape such as a cap, a stopper, a spout, a nozzle, etc., and may be a plate shape, a sheet shape, a film shape, or the like. There may be.

In addition, in this embodiment, although it has a plastic surface structure, it is not limited to this, For example, you may have a glass surface structure.
Further, the surface structure made of plastic or glass means that the portion that becomes the surface structure is made of plastic or glass, or contains plastic and / or glass. Therefore, the part which becomes a surface structure may have a metal etc. other than plastic and glass, for example.

Further, the molded body 1 has the above-described surface structure having the uneven shape 2, and at least a part of the surface of the uneven shape 2 has the auxiliary uneven shape 3 smaller than the uneven shape 2.
In this embodiment, the concavo-convex shape 2 and the auxiliary concavo-convex shape 3 are transferred together by a hot embossing method using a stamper 11 as described later, but the present invention is not limited to this. For example, the uneven shape 2 may be transferred to the surface on which the auxiliary uneven shape 3 is formed in advance, or the auxiliary uneven shape 3 may be formed on the surface on which the uneven shape 2 has been transferred in advance.

(Uneven shape)
The uneven shape 2 has a plurality of juxtaposed convex portions 21 and a plurality of juxtaposed concave portions 22. The convex portion 21 has a substantially rectangular cross-sectional shape in the thickness direction and a substantially rectangular shape with a long top surface. Moreover, the recessed part 22 is formed of the adjacent convex part 21, and the cross-sectional shape of the thickness direction is substantially rectangular shape.
In the concavo-convex shape 2, the width of the top surface of the convex portion 21 (appropriately referred to as the apex width) is w ₁ , the pitch between the adjacent convex portions 21 is p ₁ , and the adjacent convex portions 21. The gap between them is g ₁ (g ₁ = p ₁ −w ₁ ).

Note that the structure of the concavo-convex shape 2 is not limited to the above-mentioned line & space shape, and may be, for example, a pillar array shape shown in FIG. 2A or a hole array shape shown in FIG.
Moreover, although the convex part 21 and the recessed part 22 are substantially rectangular in the cross-sectional shape of the thickness direction, it is not limited to this, For example, the top surface shown to Fig.3 (a) in a predetermined direction Various shapes such as an inclined shape, a substantially trapezoidal shape shown in FIG. 3 (b), a needle shape shown in FIG. 3 (c), or a mountain shape shown in FIG. 3 (d) may be used. In FIG. 3, the auxiliary uneven shape 3 is omitted.
Furthermore, although the some convex part 21 and the recessed part 22 are each made into the same shape, it is not limited to this, For example, although not shown in figure, a different shape may be sufficient.

(Auxiliary uneven shape)
The auxiliary uneven shape 3 is formed on the surface of the uneven shape 2 and is smaller than the uneven shape 2. As shown in FIG. 4, the auxiliary uneven shape 3 is generally composed of a convex portion and a concave portion having an arbitrary shape depending on the surface roughness. Here, the roughness curve shown in FIG. 4 is an example, and the present invention is not limited to this.

In the present embodiment, the auxiliary concavo-convex shape 3 is formed on almost the entire surface of the concavo-convex shape 2. However, the present invention is not limited to this, and a part of the concavo-convex shape 2 (for example, the top of the convex portion 21) is formed. The auxiliary uneven shape 3 may be formed on the surface.
Further, the auxiliary concavo-convex shape 3 smaller than the concavo-convex shape 2 refers to the top width w ₂ of the convex portion of the auxiliary concavo-convex shape 3 with respect to the top width w ₁ , depth h ₁ and pitch p ₁ of the concavo-convex shape _2. The apex is usually fine because it is curved.), Depth h ₂ (also called arithmetic mean roughness Ra (= h ₂ )) and pitch p ₂ (average distance RSm of local peaks) (= p ₂₎ also called.) _{is, w1> w 2, h 1} > h 2, refers to p 1> is _{p 2.}

Further, the molded body 1 is configured such that the uneven shape 2 and the auxiliary uneven shape 3 are made of the same plastic material for molding, and the surface structure is substantially free of residual strain components. That is, the molded body 1 is a plastic molded body having a double concavo-convex structure formed by transfer molding. Since the surface structure of the molded body 1 is formed by transfer molding as will be described later, there is substantially no residual strain.
For example, if the surface structure portion is made of glass, the concave and convex shape 2 and the auxiliary concave and convex shape 3 made of the same molding glass material are formed on the surface side of the glass.
In addition, the fact that there is substantially no residual strain refers to the case of k ≦ 1.10.

Next, an operation and a preferable configuration of the molded body 1 having the above configuration will be described with reference to the drawings.
First, it is known that when the surface has a fine structure, the liquid repellency increases. There are Wenzel's theory and Cassie's theory concerning the contact angle.
FIG. 5A shows a schematic diagram of the Wenzel mode according to Wenzel's theory, and the apparent contact angle θ ^* is expressed by the following equation (1).
cos θ ^* = r × cos θ Formula _E (1)
Note that θ _E is a contact angle on a flat plate (also referred to as an initial contact angle).
In the above formula (1), r is also referred to as the degree of unevenness (= contact area / projected area), and r becomes larger as the pitch is narrower and the pattern is deeper.

FIG. 5B shows a schematic diagram of the Cassie mode according to Cassie's theory, and the apparent contact angle θ ^* is expressed by the following equation (2).
cos θ ^* = φ _s + 1 + φ _s × cos θ Formula _E (2)
Note that θ _E is a contact angle on a flat plate (also referred to as an initial contact angle).
In the above formula (2), the area ratio φ _s is φ _s = contact area / projected area, and φ _s becomes smaller as the pitch is wider and the top width of the pattern convex portion is narrower.

  Here, as for liquid repellency, it is known that the liquid repellency is improved in both the Wenzel mode and the Cassie mode, but in order to improve the tumbling property and repeated tumbling property, Inventor of the present invention that it is effective to stably maintain the Cassie mode, that is, to stably maintain an air pocket between the convex portions 21 (also referred to as a state in which there is air in the concave portion 22). Etc. came to think about. In other words, the Wenzel mode has a large interface between the liquid phase and the solid phase. As a result, the physical adsorption force acting on the interface also increases. Absent. Since the Cassie mode has a small interface, it is considered that the energy barrier that must be overcome when the droplet falls is easy to fall, and it falls repeatedly any number of times.

Then, the inventors conducted a simulation using the following formula (3) relating to the energy of the droplet in order to search for a condition for stably maintaining the Cassie mode.
G / ((9π) ^1/3 × V ^2/3 × σ _LV ) = (1−cos θ ^* ) ^2/3 × (2 + cos θ ^* ) ^1/3 formula (3)
G is the energy of the droplet placed on the substrate, V is the volume of the droplet, σ _LV is the surface tension between the liquid and gas phase, and the simulation conditions are:
Pattern: Line & space shape Convex top width: 20 μm
Pattern depth: 50 μm
It was.

According to the simulation of the above equation (3), as shown in FIG. 6A, at θ _E = 94 °, the Wenzel mode is always more stable, and it is considered that the falling property and the repeated falling property are lower. However, as shown in FIG. 6B, the initial contact angle is improved, and when θ _E = 105 °, the Cassie mode is always more stable in the range of φ _s ≧ 0.5, and the tumbling property is reduced. As a result, it was found that repeated fallability can be expected. That is, if the initial contact angle can be improved by the effect of the auxiliary uneven shape 3 by engraving the auxiliary uneven shape 3 on the surface of the uneven shape 2, the Cassie mode is always stable by the uneven shape 2. It was inferred that it could create a new area.
In addition, the initial contact angle θ _E of commercially available soy sauce for the flat plate made of polypropylene is θ _E = 94 °.

Next, the improvement of the fallability of soy sauce with respect to the flat plate made of polypropylene and the repeated fallability will be considered.
First, the auxiliary uneven shape 3 will be considered.
When the initial contact angle θ _E of the droplet is θ _E = 94 °, it is considered that the droplet takes either the Cassie mode or the Wenzel mode with respect to the auxiliary uneven shape 3. In the Cassie mode, as shown in FIG. 7A, the apparent contact angle θ ^* is θ ^* ≧ 105 ° when φ _s2 ≦ 0.80, as shown in FIG. .
Note that the lower limit of φ _s2 is usually 0.001 (φ _s2 ≧ 0.001). The reason for this is that if φ _s2 is smaller than 0.001, the top width w ₂ of the convex portion becomes narrow, the durability against external force is remarkably lowered, and it becomes impractical.

Further, in the Wenzel mode, as shown in FIG. 7B, the apparent contact angle θ ^* is expressed as θ ^* ≧ 105 ° when r ≧ 3.5 as shown in FIG. Become.
The upper limit of r is usually 20.0 (r ≦ 20.0). This is because when r is larger than 20.0, the aspect ratio (= depth h ₂ ÷ top width w _{2 of the} convex portion) becomes large, and the manufacturing cost of the stamper becomes enormous and becomes impractical.
If the auxiliary concavo-convex shape 3 that satisfies the above conditions is formed on the surface of the concavo-convex shape 2, the initial contact angle can be improved to θ _E ≧ 105 °.

Second, the uneven shape 2 will be considered.
Since it can be assumed that the Cassie mode is always stably formed by the auxiliary concave / convex shape 3, it is considered that all the behaviors of the liquid droplets by the concave / convex shape 2 assume the Cassie mode.
Here, as shown in FIG. 8, when φ _s1 ≦ 0.5, the apparent contact angle is θ ^* ≧ 130 °, and the droplet swells almost spherically. The interface between the liquid phase and the solid phase is reduced, and as a result, the physical adsorption force is reduced, and the fallability and repeated fallability are improved.
The lower limit value of φ _s1 is 0.001 (φ _s1 ≧ 0.001). The reason for this is that if φ _s1 is smaller than 0.001, the top width w _{1 of the} convex portion becomes narrow, the durability against external force is remarkably lowered, and it becomes impractical.

Furthermore, it is better that the gap g ₁ of the concavo-convex shape 2 is g ₁ ≦ 300 μm, so that the transition from the Cassie mode to the Wenzel mode due to the weight of the droplet can be avoided. That is, the gap g ₁ (see FIG. 1) of the uneven shape 2 has an upper limit value. The reason for this is that when the gap g ₁ becomes longer, the capillary force cannot support the drop weight due to the drop height H (see FIG. 5A), the drop enters the gap, and the Weszel mode changes from the Cassie mode. Transition to mode. Here, as shown in FIG. 9, when g ₁ ≦ 300 μm, it is possible to withstand a droplet having a droplet height H ≧ approximately 10 mm.
The lower limit of g ₁ is usually 1 μm (g ₁ ≧ 1 μm). The reason for this is that if g ₁ is smaller than ₁ μm, the top width w ₁ of the convex portion is also narrowed, so that the durability against external force is remarkably lowered and becomes impractical.

From the simulation results described above, the molded body 1 preferably has an area ratio φ _s1 of the concavo-convex shape 2 of 0.001 ≦ φ _s1 ≦ 0.50 and a gap g ₁ of the concavo-convex shape 2 of ₁ μm ≦ g ₁ ≦ 300 μm, and the area ratio φ _s2 of the auxiliary concave-convex shape 3 is 0.001 ≦ φ _s2 ≦ 0.80, or the concave-convex degree r of the auxiliary concave-convex shape 3 is 3.5. It is preferable that ≦ r ≦ 20.0.
If it does in this way, the molded object excellent in tumbling property and repeated tumbling property can be obtained.

  As described above, the molded body 1 can maintain the Cassie mode with respect to the droplets, and can improve the fallability. In particular, by maintaining the Cassie mode, a minute amount of liquid droplets does not remain in the gap of the concavo-convex shape 2, and therefore, it is possible to improve the repetitive falling property for the liquid droplets.

[Second Embodiment of Molded Body]
In FIG. 10A, the molded body of the present embodiment is an inner plug 1a, and the inner plug 1a is attached to a bottle body (not shown) that stores the liquid 100.
Further, in the present embodiment, the liquid 100 is used as soy sauce, but the liquid 100 is not particularly limited. For example, the liquid 100 is food such as water, sauce, soft drink, ketchup, lotion, or medicine. Also good.
In addition, in FIG. 10, the inside plug 1a has shown the principal part, Although not shown in figure, you may have a rotation-type cover part.

The inner plug 1a has a spout lip 101. The spout lip 101 has a substantially annular upper surface 102 and a side surface 103 along a substantially vertical direction. The upper surface 102 has substantially the same surface structure (not shown) as the surface structure having the uneven shape 2 and the auxiliary uneven shape 3 described above.
Moreover, the surface structure of the upper surface 102 is formed so that the convex portion 21 and the concave portion 22 are concentric with respect to the central axis of the inner plug 1a as compared with the surface structure of the first embodiment.

Here, the inner plug 1a is preferably made of the same plastic material for molding. In this way, the structure can be simplified and the manufacturing cost can be reduced.
In this embodiment, the inner plug 1a is made of the same plastic material for molding. However, the present invention is not limited to this. For example, only the surface structure of the spout lip 101 of the inner plug 1a is used. It is good also as a structure which consists of the same plastic material for a shaping | molding. In this way, the surface structure can be simplified, and the manufacturing cost can be reduced.

In the present embodiment, the inner plug 1a is made of a thermoplastic resin, but is not limited thereto. For example, glass, a thermosetting resin, or a photocurable resin may be used. Even in this case, a surface structure having the uneven shape 2 and the auxiliary uneven shape 3 described above can be formed.
The vicinity mentioned above means a region having a depth from the surface of about 0.1 mm to several mm.

When the liquid 100 is poured, the inner plug 1a having the above-described configuration is tilted and the liquid 100 is poured as shown in FIG.
Next, when the pouring of the liquid 100 is stopped, the liquid 100 falls from the upper surface 102 as shown in FIG.

As described above, according to the inner plug 1a of the present embodiment, substantially the same effect as that of the molded body 1 of the first embodiment, that is, the Cassie mode can be maintained, and the falling property and the repeated falling property can be maintained. Due to the effect that the liquid can be improved, a good drainage can be realized. Therefore, the inner plug 1a can prevent dripping almost permanently.
In the present embodiment, the molded body is the inner plug 1a for flowing the liquid 100, but is not limited to this. For example, although not shown, the molded body is a cap, a spout or a nozzle. May be.

[One Embodiment of Manufacturing Method of Molded Body]
The present invention is also effective as an invention of a method for producing a molded body.
The manufacturing method of the molded body of the present embodiment is a manufacturing method of the molded body 1 described above, and is a stamper 11 on which a shaping surface corresponding to the uneven shape 2 and the auxiliary uneven shape 3 smaller than the uneven shape 2 is formed. Is used to form a concavo-convex shape 2 and an auxiliary concavo-convex shape 3 on a plastic substrate 10 as an object to be transferred.
Further, in the present embodiment, the hot embossing method is used in the transfer process, but the present invention is not limited to this. For example, an injection molding method, a UV imprint method, or a compression molding method may be used. Good.

Next, the shaping | molding apparatus 7 which performs the manufacturing method of the molded object of this embodiment is demonstrated with reference to drawings.
11A, the molding apparatus 7 includes a stamper 11, an upper mold 71, a lower mold 72, a cooling plate 73, a light source 74, and the like.
The upper mold 71 and the lower mold 72 are attached to a press means (not shown), and the lower mold 72 moves up and down.

The upper mold 71 includes a cooling plate 73 that reciprocates in the horizontal direction, a stamper 11 that is mounted below the cooling plate 73 so as to be movable in the vertical direction, and a heating unit that is mounted above the cooling plate 73. The plastic substrate 10 is made of a thermoplastic resin.
Further, the cooling plate 73 is formed with a flow path (not shown) for circulating cooling water therein, and can be efficiently cooled.

Here, preferably, a shape corresponding to the auxiliary uneven shape 3 is formed on the shaping surface of the stamper 11 by blasting, dry etching, or wet etching. If it does in this way, the shape corresponding to the uneven | corrugated shape 3 for auxiliary | assistant can be formed easily.
In the present embodiment, as will be described later, a shape corresponding to the auxiliary uneven shape 3 is formed on the shaping surface of the stamper 11 by blasting.

Further, the stamper 11 normally has a black film 75 on the upper surface, and efficiently absorbs infrared rays from the light source 74. Thereby, the shaping surface of the stamper 11 is uniformly and rapidly heated by infrared radiation heating.
In addition, it is good also as a structure which has a plating film instead of the black film 75. FIG.
Examples of the black film 75 include a silicone black paint. Examples of the plating film include electroless Ni plating and black Cr plating.

Next, the manufacturing method of the molded object of this embodiment, operation | movement of the shaping | molding apparatus 7, etc. are demonstrated with reference to drawings.
First, as shown in FIG. 11A, in the initial state, the molding apparatus 7 has the light source 74 turned off, the cooling plate 73 is located below the light source 74, and the stamper 11 is located below the accommodation space. The plastic substrate 10 is placed on the lower mold 72.

  Next, as shown in FIG. 11B, the molding apparatus 7 moves the cooling plate 73 from below the light source 74, the light source 74 is turned on, irradiates the stamper 11 with infrared rays, and radiates and heats the stamper 11. (Heating step).

  Next, as shown in FIG. 11C, in the molding apparatus 7, the light source 74 is turned off, the cooling plate 73 is moved below the light source 74, and the lower mold 72 is raised. At this time, first, the plastic substrate 10 comes into contact with the shaping surface of the stamper 11, the transfer is started, the lower mold 72 is further raised, and the stamper 11 (the black film 75 of the stamper 11) comes into contact with the cooling plate 73. The transfer is completed (transfer process). Further, when the stamper 11 comes into contact with the cooling plate 73, cooling of the stamper 11 is started. Subsequently, after the transfer is completed, cooling of the plastic substrate 10 is started by the cooled stamper 11, and then the plastic substrate 10 is started. Is finished (cooling step).

Here, as described above, the manufacturing method of the molded body of the present embodiment is performed once using the stamper 11 in which the shaping surface corresponding to the uneven shape 2 and the auxiliary uneven shape 3 is formed in the transfer step. Since the uneven shape 2 and the auxiliary uneven shape 3 are formed on the plastic substrate 10 by this transfer, productivity and the like can be improved.
That is, for example, as in Patent Document 4, after forming the concavo-convex shape 2, compared with the manufacturing method of forming the auxiliary concavo-convex shape 3 by etching or application of a silica particle-containing paint, the production of the molded body of the present embodiment The method can improve productivity and reduce the cost of manufacturing equipment.

Next, as shown in FIG. 11 (d), in the molding apparatus 7, the lower mold 72 is lowered, the state where the shaping surface of the stamper 11 and the transfer surface of the plastic substrate 10 are in contact with each other is released, and the molded body 1 is released. Is released (release process). Thereafter, the molded body 1 is conveyed from the lower mold 72 to the next process.
In addition, the manufacturing method of the molded object of this embodiment has a heating process, a transfer process, a cooling process, and a mold release process as mentioned above.

  As described above, according to the method for manufacturing a molded body of the present embodiment, the uneven shape 2 and the auxiliary uneven shape 3 are formed on the plastic substrate 10 by one transfer using the stamper 11 in the transfer step. Since it forms, productivity etc. can be improved.

[One Embodiment of Stamper]
The present invention is also effective as a stamper invention.
In FIG. 12, the stamper of the present embodiment is a stamper used for manufacturing the molded body 1 described above, and has a concavo-convex shape 12 on a shaping surface (a surface opposite to the light source side in FIG. 12). At least a part of the surface of the concavo-convex shape 12 has an auxiliary concavo-convex shape 13 smaller than the concavo-convex shape 12.
The uneven shape 12 is for transferring the uneven shape 2 of the molded body 1, and the auxiliary uneven shape 13 is for transferring the auxiliary uneven shape 3 of the molded body 1.

(Uneven shape)
The concavo-convex shape 12 includes a plurality of juxtaposed convex portions 121 and a plurality of juxtaposed concave portions 122. The convex portion 121 has a substantially rectangular cross-sectional shape in the thickness direction and a substantially rectangular shape with a long top surface. Moreover, the recessed part 122 is formed between the adjacent convex parts 21, and the cross-sectional shape of the thickness direction is substantially rectangular shape.
In the concavo-convex shape 12, the width of the top surface of the convex portion 121 (appropriately abbreviated as the top width) is w ₃ , the pitch between the adjacent convex portions 121 is p ₃ , and the adjacent convex portions 121. The gap between them is g ₃ (g ₃ = p ₃ −w ₃ ).

(Auxiliary uneven shape)
The auxiliary uneven shape 13 is formed on the surface of the uneven shape 12 and is smaller than the uneven shape 12. As shown in FIG. 13, the auxiliary uneven shape 13 is generally composed of a convex portion and a concave portion having an arbitrary shape depending on the surface roughness. Here, the roughness curve shown in FIG. 13 is an example, and the present invention is not limited to this.

The auxiliary concave / convex shape 13 smaller than the concave / convex shape 12 is the top width w ₄ () of the convex portion of the auxiliary concave / convex shape 13 with respect to the top width w ₃ , depth h ₃ and pitch p ₃ of the concave / convex shape 12. The apex is usually fine because it is curved.), Depth h ₄ (also called arithmetic average roughness Ra (= h ₄ )) and pitch p ₄ (average distance RSm (= p ₄ ) is also referred to as w ₃ > w ₄ , h ₃ > h ₄ , and p ₃ > p ₄ .
For each dimension of the molded body 1 described above, the top width w _{3 of the} concavo-convex shape 12 = the gap g ₁ of the concavo-convex shape 2, the depth h ₃ = the depth h ₁ , and the pitch p ₃ = pitch p _1. The relationship is almost established.

Here, the stamper 11 has a shape corresponding to the auxiliary uneven shape 3 (that is, the auxiliary uneven shape 13) formed on the shaping surface of the stamper 11 by blasting. If it does in this way, the shape corresponding to the uneven | corrugated shape 3 for auxiliary | assistant can be formed easily.
The stamper 11 is not limited to the above-described configuration. For example, the stamper 11 is subjected to blast processing or dry etching processing on an epoxy resin master having the concavo-convex shape 12 formed by photolithography, and an auxiliary concavo-convex shape on the surface. 13 may be formed, and the stamper 11 may be manufactured by performing electroforming of this master on a mother die.

  As described above, according to the stamper 11 of this embodiment, the shape corresponding to the auxiliary uneven shape 3 (that is, the auxiliary uneven shape 13) can be easily formed. Further, the manufacturing cost of the stamper 11 can be reduced.

"Residual strain"
Next, the above-described residual strain will be described.
In general, if the residual strain is in the surface structure (that is, uneven shape and auxiliary uneven shape) engraved on the surface of a plastic or glass substrate, it is frozen over time or when the surface temperature rises. The strain is restored and a dimensional change of the surface structure occurs.
In the present invention, when a dimensional change due to residual strain occurs, the desired liquid repellency, falling property, and repeated falling property cannot be obtained. In addition, when a concavo-convex shape is formed on the surface of a substrate by transfer molding, since the concavo-convex shape is formed with the surface being melted, no residual strain is generated.

However, when a concavo-convex shape is formed by blasting or etching, external force of stretching and compression is applied to the surface, molecular orientation occurs in the vicinity of the surface, and density increases. Due to this increase in density, the surface becomes hard and residual strain corresponding to the increase in density occurs. Thus, since the generation | occurrence | production of a residual strain and the increase in hardness have generate | occur | produced for the same cause, a residual strain can be quantified by hardness.
Therefore, as a method for measuring the local hardness of the substrate surface, a nanoindentation method was adopted, and an evaluation test was performed on Examples and Comparative Examples as described later.
Next, the method of this evaluation test will be described.

<Evaluation test method>
The evaluation test method is as follows.
First, for a substrate having a surface structure molded under the molding conditions shown in Table 1 of FIG. 14, the following equipment is used to measure the hardness index “Indentation Young's Modules (E _IT )” (Indentation Young's modulus (E Measure _IT ))).
Next, the hardness (E _IT ) of the surface structure part of the molded body and the hardness (E _IT0 ) of the part where the surface structure is not molded are measured, and the ratio k of E _IT and E _IT0 (= E _IT / E _IT0 ) is calculated.
When k> 1.10, it is determined that the surface structure portion is hard and residual strain exists. Normally, dimensional deformation occurs during subsequent creep.
Further, when k ≦ 1.10, it is determined that there is substantially no residual strain in the surface structure portion. Usually, dimensional deformation does not occur thereafter.

The devices used are as follows.
Equipment: ENT-2100 (S / N: H39-070) manufactured by Elionix
Indenter: Belkovic Indenter No.5964
Max Load: 0.03mN
Loading Rate: 0.06mN / min
Unloading Rate: 0.06mN / min
Pause (holding time): 60s

なお、式（４）において、
E_IT :Indentation Young’s Modules
E_r :All Young’s modulus
E_i :Young’s modulus of Diamond
ν :Poisson’s ratio of test sample
ν_i :Poisson’s ratio of Diamond
である。 Indentation Young's Modules (E _IT ) is calculated by the following equation (4).

In equation (4),
E _IT : Indentation Young's Modules
E _r : All Young's modulus
E _i : Young's modulus of Diamond
ν: Poisson's ratio of test sample
ν _i : Poisson's ratio of Diamond
It is.

The molded body of Example 1 is a square flat plate (substrate), as shown in Table 1 in FIG.
The material was PP (prime polymer J246M), the size was 58 mm long × 50 mm wide × 3 mm thick, and the molding method was transfer molding using the stamper 11 (hot embossing method).
The uneven shape 2 has a line & space shape, a top width w ₁ of 20 μm, a pitch p ₁ of 100 μm, a gap g ₁ of 80 μm, and an area ratio φ _s1 of 0 .2.
The auxiliary uneven shape 3 is a pillar array, the top width w ₂ is 50 nm, the pitch p ₂ is 100 nm, the gap g ₂ is 50 nm, and the depth h ₂ is 500 nm. And the pitch p ₁ is 100 μm,
The area ratio φ _s2 was 0.25, and the unevenness r was 11.

As shown in Table 2 of FIG. 15, the molded body of Example 1 was evaluated for the presence or absence of residual strain.
As an evaluation parameter, when k ≦ 1.10, residual strain was absent (◯), and when k> 1.10, residual strain was present (×).
The molded body of Example 1 had no residual strain (O).

Moreover, as shown in Table 2 of FIG. 15, the uneven | corrugated shape 2 and the auxiliary | assistant uneven | corrugated shape 3 were evaluated with respect to the molded object of Example 1. FIG.
As an evaluation parameter, when the area ratio φ _s1 of the concavo-convex shape 2 is 0.001 ≦ φ _s1 ≦ 0.50, it is within the range (◯), and when this condition is not satisfied, it is out of the range (×). .
In addition, when the gap g ₁ of the concavo-convex shape 2 is 1 μm ≦ g ₁ ≦ 300 μm, it is in the range (◯), and when this condition is not satisfied, it is out of the range (×).
Further, when the area ratio φ _s2 of the auxiliary uneven shape 3 is 0.001 ≦ φ _s2 ≦ 0.80, it is in the range (◯), and when this condition is not satisfied, it is out of the range (×).
Moreover, when the uneven | corrugated degree r of the auxiliary | assistant uneven | corrugated shape 3 was 3.5 <= r <= 20.0, it was set as the inside ((circle)), and when not satisfy | filling this condition, it was set as the outside (x).
The molded body of Example 1 had an area ratio φ _s1 = ○, a gap g ₁ = ○, an area ratio φ _s2 = ○, and an unevenness degree r = ○.

Moreover, as shown in Table 2 of FIG. 15, the performance regarding a dimensional change, tumbling property, and repeated tumbling property was evaluated with respect to the molded object of Example 1. FIG.
As an evaluation parameter for dimensional change, compare the dimensions immediately after molding (after about 30 minutes) and after 24 hours. If the shape has not changed, the shape has not changed (O), and the shape has changed. (When the dimension has changed by more than ± 5%), the shape was changed (×).
The molded body of Example 1 had no change in shape (◯).

As shown in Table 2 of FIG. 15, the fallability of the molded body of Example 1 was evaluated.
As an evaluation parameter for the fallability, an actual liquid (pure water, soy sauce, and medium-concentrated sauce) was dropped on the molded body of Example 1 shown in Table 1 of FIG. 14, and the molded body was gradually tilted. The drop angle, which is the angle when the droplet started to fall, was measured. In addition, the amount of dripping and the apparatus for measuring were as follows.
Dropping amount:
・ Pure water: 17mg
・ Soy sauce: 14mg
・ Medium sauce: 16mg
Apparatus: DropMaster700 manufactured by Kyowa Interface Science Co., Ltd.
Then, a falling angle ≦ 20 ° was determined to be good (◯), and a falling angle> 20 ° was determined to be a poor falling property (×).
The molded body of Example 1 had a falling angle ≦ 20 ° (◯) with respect to each of the actual liquids.

As shown in Table 2 of FIG. 15, the rollability of the molded body of Example 1 was evaluated repeatedly.
As an evaluation parameter for repeated fallability, the molded body of Example 1 shown in Table 1 of FIG. 14 was fixed at an angle of 20 °, and the actual liquid (the above pure water, soy sauce, medium concentrated sauce) was repeatedly dropped. In addition, when the number of times of dropping when the droplets adhered to the compact and stopped falling was n (n is a natural number), the number of times that the droplet could be repeatedly dropped was set to n-1. Further, when the repetitive falling property is good, the repetitive falling possible number n-1 takes a large value.
Then, when the number of possible tumbles was ≧ 50, it was determined that the repeated tumbling was good (◯), and when the number of tumblable times was less than 50, it was determined that the repeated tumbling was poor (×).
In the molded body of Example 1, the number of times that the rolls could be repeatedly tumbled 50 times (◯) with respect to each of the actual liquids.
As above-mentioned, the molded object of Example 1 obtained the favorable result in each evaluation item.

“Comparative Example 1”
The molded body of Comparative Example 1 was different from the molded body of Example 1 in that the molding method was different as shown in Table 1 of FIG. In other words, the molded article of Comparative Example 1 was formed by forming the concavo-convex shape 2 by transfer molding (hot embossing method) and then forming the auxiliary concavo-convex shape 3 by blasting. The other configuration of the first comparative example was almost the same as that of the first example. In Table 1 of FIG. 14, “←” means the same as the left.
Therefore, detailed description of the same components as those in the first embodiment is omitted.

Each evaluation was performed on the molded body of Comparative Example 1 in the same manner as in Example 1.
As shown in Table 2 of FIG.
Regarding the presence or absence of residual strain, k> 1.10 and residual strain was present (x).
Further, for the uneven shape 2 and the auxiliary uneven shape 3, the area ratio φ _s1 = ◯, the gap g ₁ = ◯, the area ratio φ _s2 = ◯, and the unevenness degree r = ◯. In Comparative Example 1, although the dimensions change as described later, the area ratio φ _s1 = ◯, the gap g ₁ = ◯, the area ratio φ _s2 = immediately after molding (after about 30 minutes) and after 24 hours. ○, Concavity and convexity r = ◯.
Moreover, about the dimensional change, there was a shape change (x).
In addition, the falling property was a falling angle ≦ 20 ° (◯) with respect to each of the actual liquids.
In addition, the repetitive fallability was such that the number of possible repetitive rolls ≧ 50 times (◯) with respect to each of the actual liquids.

"Reference Example 1"
Compared with the molded body of Example 1, the molded body of Reference Example 1 has a top width w ₁ of the concavo-convex shape 2 of 0.2 μm and a pitch p ₁ of 250 μm, as shown in Table 1 of FIG. The difference was that the gap g ₁ was 249.8 μm and the area ratio φ _s1 was 0.0008. The other configuration of the reference example 1 was almost the same as that of the example 1.
Therefore, detailed description of the same components as those in the first embodiment is omitted.

Each evaluation was performed on the molded body of Reference Example 1 in the same manner as in Example 1.
As shown in Table 2 of FIG.
About the presence or absence of a residual strain, it was k <= 1.10 and there was no residual strain ((circle)).
Further, for the uneven shape 2 and the auxiliary uneven shape 3, the area ratio φ _s1 = ×, the gap g ₁ = ◯, the area ratio φ _s2 = ◯, and the unevenness degree r = ◯.
Further, the dimensional change was no change in shape (◯).
In addition, the falling property was a falling angle ≦ 20 ° (◯) with respect to each of the actual liquids.
In addition, the repetitive fallability was such that the number of possible repetitive rolls ≧ 50 times (◯) with respect to each of the actual liquids.
However, in the molded body of Reference Example 1, a part of the pattern was lost during the evaluation test.

"Reference Example 2"
Compared with the molded body of Example 1, the molded body of Reference Example 2 has a top width w ₁ of the concavo-convex shape 2 of 0.5 μm and a pitch p ₁ of 1.3 μm, as shown in Table 1 of FIG. The difference was that the gap g ₁ was 0.8 μm and the area ratio φ _s1 was 0.38. The other configurations of the reference example 2 were almost the same as those of the example 1.
Therefore, detailed description of the same components as those in the first embodiment is omitted.

Each evaluation was performed on the molded body of Reference Example 2 in the same manner as in Example 1.
As shown in Table 2 of FIG.
About the presence or absence of a residual strain, it was k <= 1.10 and there was no residual strain ((circle)).
Further, for the uneven shape 2 and the auxiliary uneven shape 3, the area ratio φ _s1 = ◯, the gap g ₁ = ×, the area ratio φ _s2 = ○, and the unevenness degree r = ◯.
Further, the dimensional change was no change in shape (◯).
In addition, the falling property was a falling angle ≦ 20 ° (◯) with respect to each of the actual liquids.
In addition, the repetitive fallability was such that the number of possible repetitive rolls ≧ 50 times (◯) with respect to each of the actual liquids.
However, the molded body of Reference Example 2 lacked a part of the pattern during the evaluation test.

"Reference Example 3"
Compared with the molded body of Example 1, the molded body of Reference Example 3 has a top width w ₁ of the concavo-convex shape 2 of 20 μm, a pitch p ₁ of 100 μm, and a gap as shown in Table 1 of FIG. The point that g ₁ is 80 μm, the area ratio φ _s1 is 0.2, the apex width w ₂ of the auxiliary uneven shape 3 is 10 nm, the pitch p ₂ is 400 nm, and the gap g ₂ is 390 nm. Yes, the depth h ₂ was 10,000 nm, the area ratio φ _s2 was 0.0006, and the unevenness r was 3.5. The other configurations of the reference example 3 were almost the same as those of the example 1.
Therefore, detailed description of the same components as those in the first embodiment is omitted.

Each evaluation was performed on the molded body of Reference Example 3 in the same manner as in Example 1.
As shown in Table 2 of FIG.
About the presence or absence of a residual strain, it was k <= 1.10 and there was no residual strain ((circle)).
Further, for the uneven shape 2 and the auxiliary uneven shape 3, the area ratio φ _s1 = ◯, the gap g ₁ = ◯, the area ratio φ _s2 = ×, and the unevenness degree r = ◯.
Further, the dimensional change was no change in shape (◯).
In addition, the falling property was a falling angle ≦ 20 ° (◯) with respect to each of the actual liquids.
In addition, the repetitive fallability was such that the number of possible repetitive rolls ≧ 50 times (◯) with respect to each of the actual liquids.
However, in the molded body of Reference Example 3, a part of the pattern was lost during the evaluation test.

“Reference Example 4”
Compared with the molded body of Example 1, the molded body of Reference Example 4 has a top width w ₁ of the concavo-convex shape 2 of 20 μm, a pitch p ₁ of 100 μm, and a gap as shown in Table 1 of FIG. The point that g ₁ is 80 μm, the area ratio φ _s1 is 0.2, and the top width w ₂ of the auxiliary uneven shape 3 is 10 nm, the pitch p ₂ is 100 nm, and the gap g ₂ is 90 nm. And the depth h ₂ is 500 nm, the area ratio φ _s2 is 0.01, and the unevenness r is 3. The rest of the configuration of the reference example 4 was almost the same as that of the example 1.
Therefore, detailed description of the same components as those in the first embodiment is omitted.

Each evaluation was performed on the molded body of Reference Example 4 in the same manner as in Example 1.
As shown in Table 2 of FIG.
About the presence or absence of a residual strain, it was k <= 1.10 and there was no residual strain ((circle)).
Further, with respect to the concavo-convex shape 2 and the auxiliary concavo-convex shape 3, the area ratio φ _s1 = _１ , the gap g ₁ = ○, the area ratio φ _s2 = ○, and the concavo-convex degree r = x.
Further, the dimensional change was no change in shape (◯).
In addition, the falling property was a falling angle ≦ 20 ° (◯) with respect to each of the actual liquids.
In addition, the repetitive fallability was such that the number of possible repetitive rolls ≧ 50 times (◯) with respect to each of the actual liquids.
However, in the molded body of Reference Example 4, a part of the pattern was lost during the evaluation test.

As mentioned above, although the preferred embodiment etc. were shown and explained about the forming object of the present invention, the manufacturing method of a forming object, and the stamper, the forming object concerning the present invention, the manufacturing method of the forming object, and the stamper are in the embodiment mentioned above. Needless to say, the present invention is not limited thereto, and various modifications can be made within the scope of the present invention.
For example, the structure of the spout lip 101 of the inner plug 1a is not limited to the above, and may be various shapes. That is, for example, although not illustrated, the side surface 103 may have a surface structure that is substantially the same as the surface structure having the uneven shape 2 and the auxiliary uneven shape 3. Further, the upper surface 102 and the side surface 103 are chamfered, and the chamfered surface may have substantially the same surface structure as the surface structure having the uneven shape 2 and the auxiliary uneven shape 3.

  Moreover, the manufacturing method of the molded body according to the present embodiment is a method of forming the uneven shape 2 and the auxiliary uneven shape 3 by one transfer using the stamper 11. However, the present invention is not limited to this. For example, a sheet-shaped or film-shaped molded body 1 having a concavo-convex shape 2 is formed by injection molding, and then the molded body 1 is assisted by using a roller-shaped stamper. The uneven shape 3 may be compression molded.

1 Molded body 1a Inner plug 2a, 2b, 2c, 2d, 2e, 2f
3 Auxiliary uneven shape 7 Molding device 10 Plastic substrate 11 Stamper
12 Uneven shape
13 Concave and convex shape for auxiliary
21a, 21b, 21c, 21d, 21e, 21f Convex part
22a, 22b, 22c, 22d, 22e, 22f Recess
71 Upper mold 72 Lower mold 73 Cooling plate 74 Light source 75 Black film 100 Liquid 101 Spout lip 102 Upper surface 103 Side surface 121 Convex part 122 Concave part

Claims (9)

A molded body having a surface structure made of plastic or glass having a tumbling property with respect to droplets,
The surface structure has an uneven shape,
At least a part of the uneven surface has an auxiliary uneven shape smaller than the uneven shape,
The concave and convex portions and the auxiliary concave and convex portions are made of the same molding plastic material or glass material, and the indentation Young's modulus (E _IT ) of the portion where the surface structure is molded, and the surface structure is The ratio k (= E _IT / E _IT0 ) to the indentation Young's modulus (E _IT0 ) of the _unmolded portion is 1.10 or less,
The concavo-convex shape has a plurality of convex portions and concave portions alternately arranged at regular intervals, the convex portion has an elongated top surface, and the cross-sectional shape along the width direction of the top surface is substantially rectangular. The concave portion is formed by the adjacent convex portions, and the cross-sectional shape along the width direction of the top surface is substantially rectangular,
The area ratio φ _{s1 of the} concavo-convex shape is 0.001 ≦ φ _s1 ≦ 0.50, and the gap g _{1 of the} concavo-convex shape is 1 μm ≦ g ₁ ≦ 300 μm,
The average area ratio φ _s2 of the auxiliary uneven shape is 0.001 ≦ φ _s2 ≦ 0.80, or the average uneven degree r of the auxiliary uneven shape is 3.5 ≦ r ≦ 20.0. shaped body, wherein there <br/> that.   The molded body according to claim 1, wherein the surface of the molded body and the vicinity thereof are made of a thermoplastic resin, a thermosetting resin, or a photocurable resin. A molded body having a surface structure made of plastic or glass having a tumbling property with respect to droplets,
The surface structure has an uneven shape,
At least a part of the uneven surface has an auxiliary uneven shape smaller than the uneven shape,
The concave and convex portions and the auxiliary concave and convex portions are made of the same molding plastic material or glass material, and the indentation Young's modulus (E _IT ) of the portion where the surface structure is molded, and the surface structure is The ratio k (= E _IT / E _IT0 ) to the indentation Young's modulus (E _IT0 ) of the _unmolded portion is 1.10 or less,
The molded body is a cap, an inner plug, a spout or a nozzle for flowing a liquid. 4. The molded body according to claim 3 , wherein the uneven shape of the surface structure is provided concentrically with respect to a central axis of the cap, the inner plug, the spout or the nozzle.   The molded body according to claim 3 or 4, wherein the surface of the molded body and its vicinity are made of a thermoplastic resin, a thermosetting resin, or a photocurable resin. Using the stamper on which the shaping surface corresponding to the uneven shape of the molded body according to any one of claims 1 to 5 and an auxiliary uneven shape smaller than the uneven shape is formed, the unevenness is formed on the transfer target. The manufacturing method of the molded object characterized by having the transfer process which forms a shape and the said uneven | corrugated shape for auxiliary | assistant.   The shaped body according to claim 6, wherein a shape corresponding to the auxiliary uneven shape is formed on the shaping surface of the stamper or master by blasting, dry etching or wet etching. Method.   The method for producing a molded body according to claim 6 or 7, wherein an injection molding method, a hot embossing method, a UV imprint method, or a compression molding method is used in the transfer step. A stamper in which a shaping surface corresponding to the concave-convex shape of the molded body according to any one of claims 1 to 5 and an auxiliary concave-convex shape smaller than the concave-convex shape is formed,
A stamper, wherein a shape corresponding to the auxiliary concavo-convex shape of the molded body is formed on the shaping surface of the stamper or master by blasting, dry etching, or wet etching.

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