WO2018181833A1

WO2018181833A1 - Photocurable composition, artificial nail, method for generating shaping data, method for producing artificial nail, and system for producing artificial nail

Info

Publication number: WO2018181833A1
Application number: PCT/JP2018/013492
Authority: WO
Inventors: 俊一酒巻; 塩出　浩久
Original assignee: 三井化学株式会社
Priority date: 2017-03-29
Filing date: 2018-03-29
Publication date: 2018-10-04
Also published as: JP2021074611A; KR102271174B1; JPWO2018181833A1; CN110446729B; KR20190124262A; JP6854339B2; JP7468974B2; CN110446729A; SG11201908868UA

Abstract

Provided are: a photocurable composition for use in optical shaping, containing a (meth)acrylic monomer (X) which has a weight-average molecular weight of 400-800 and is at least one selected from di(meth)acrylic monomers having, per molecule, two aromatic rings and two (meth)acryloyloxy groups but not having a hydroxyl group or carboxyl group, a (meth)acrylic monomer (D) which has a weight-average molecular weight of 130-350 and is at least one selected from (meth)acrylic monomers having at least one aromatic ring and a (meth)acryloyloxy group per molecule, and a photopolymerization initiator; an artificial nail; a method for generating shaping data of an artificial nail; a method for producing an artificial nail; a system for producing an artificial nail; and a shaping design system.

Description

Photocurable composition, artificial nail, method for generating modeling data, artificial nail manufacturing method, and artificial nail manufacturing system

The present invention relates to a photocurable composition, an artificial nail, an artificial nail modeling data generation method, an artificial nail manufacturing method, and an artificial nail manufacturing system.

Nail art for nail care, manicure, pedicure and other nail care, makeup and decoration is popular. In recent years, nail art such as nail tips, sculptures, and chip overlays using decorated artificial nails (ie, artificial nails) has been gaining popularity.

Nail art is makeup and decoration applied to the nails of the limbs. Nail salon is a store that performs nail art, and its technician is a manicurist. There are a variety of nail art products on the market, and many women are doing professional nail art.
In the 19th century, lacquer paints for automobiles were invented in the United States, and the nail polish currently used was developed by applying this technology.
However, nail polish using a lacquer paint is still widely used, but it has a problem in that it has poor adhesion to natural nails and peels off and comes off in a short period of time after treatment. For this reason, artificial nail materials using dental cold polymerization resins have been developed.

Artificial nail material is superior in strength and durability compared to nail polish using lacquer paint, and accepted by some professionalists, but it is irritating from acrylic monomers, irritating odors, etc. Due to its poor sex, it was not widespread enough for general manicurists.
Recently, however, gel nails with improved odor stimulation and treatment operability of artificial nail materials have become the center of the market. Gel nail currently on the market is a high-viscosity liquid material mainly composed of a (meth) acrylic monomer and a photopolymerization initiator, and is cured by applying it to the nail and irradiating it with ultraviolet rays. These commercially available gel nails are accepted by many general manicurists because they have less odor and skin irritation and better treatment operability than the original artificial nail material.
JP 2010-37330 A discloses an artificial nail composition characterized by using a specific photopolymerization initiator for an artificial nail composition with improved curability.

In JP 2010-110451 A, an artificial nail having not only excellent fit but also a natural appearance suitable for each nail is attached to the outer layer having a nail shape and directly or indirectly to the outer layer. An artificial nail having a multilayer structure in which a cross section perpendicular to the central axis in the longitudinal direction of the artificial nail is formed in a desired curved state as a whole is proposed in which the outer layer and the inner layer cooperate with each other.
Japanese Patent Application Laid-Open No. 2015-209375 describes an artificial nail material composition that is cured by light irradiation as an artificial nail material composition that can easily remove an artificial nail from its own nail.

Recently, a three-dimensional modeling apparatus called a so-called 3D printer has been developed and is being used in various fields. When a 3D printer is to be applied to the field of nail art, a certain degree of hardness is required for the manufactured artificial nail, and a hardening process is required for manufacturing the artificial nail. However, in the process of curing, the artificial nail is deformed due to curing shrinkage, which results in a decrease in manufacturing accuracy, and there is a problem that a high fit cannot be obtained when the artificial nail is attached.

The present invention has been made in view of the above-described facts, and includes a photocurable composition, an artificial nail, a method for generating modeling data capable of manufacturing an artificial nail with high accuracy, a method for manufacturing an artificial nail, and an artificial nail manufacturing system. For the purpose of provision.

In recent years, three-dimensional printers (that is, 3D printers) have been developed and applied to various fields. When applying a 3D printer to the field of nail art, it is assumed that conventional curable resins for gel nails are used by applying them directly to the nail and curing them. It cannot be said that it is suitable for the purpose of chip production, and there are problems in the bending strength, bending elastic modulus, bending resistance, tensile strength, elongation rate, etc. of the cured product.
When using a 3D printer to produce an optically shaped object, preferably an artificial nail, considering the practicality, it has excellent bending strength (that is, bending strength) and bending with respect to the photocurable composition after photocuring. Elastic modulus, bending resistance, tensile strength and elongation are required.

That is, an object of an embodiment of the present invention is a photocurable composition that is used for optical modeling and has excellent bending strength and bending elastic modulus after photocuring, and further has excellent bending resistance, tensile strength, and elongation. Is to provide.
An object of one embodiment of the present invention is a cured product of the above-mentioned photocurable composition, which is an artificial nail having excellent bending strength and bending elastic modulus, and further excellent bending resistance, tensile strength and elongation. Is to provide.

As a result of intensive studies, the present inventors have found that a photocurable composition containing a combination of specific monomer types is excellent in bending strength and bending elastic modulus after photocuring, and further has bending resistance, tensile strength and elongation. The present invention was also completed by finding out that it is excellent in the rate, and that it is particularly suitable for the production of artificial nails by stereolithography.
That is, specific means for solving the above-described problems are as follows.

[1] A photocurable composition used for stereolithography, which is a di (meta) having two aromatic rings and two (meth) acryloyloxy groups without a hydroxyl group and a carboxy group in one molecule. ) (Meth) acrylic monomer (X) which is at least one selected from acrylic monomers and has a weight average molecular weight of 400 or more and 800 or less, at least one ring structure in one molecule, and one (meth) acryloyl (Meth) acrylic monomer (D) which is at least one selected from (meth) acrylic monomers having an oxy group and has a weight average molecular weight of 130 or more and 350 or less, and a photocurable composition containing a photopolymerization initiator object.
[2] The photocurable composition according to [1], wherein at least one of the di (meth) acrylic monomers constituting the (meth) acrylic monomer (X) has an ether bond in one molecule.
[3] At least one of the di (meth) acrylic monomers constituting the (meth) acrylic monomer (X) has 1 to 10 ether bonds in one molecule [1] or [2 ] The photocurable composition as described in above.

[4] At least one of the di (meth) acrylic monomers constituting the (meth) acrylic monomer (X) is a compound represented by the following general formula (x-1) [1] to [3 ] The photocurable composition as described in any one of.

[In general formula (x-1), R ^1x , R ^2x , R ^11x , and R ^12x each independently represent a hydrogen atom or a methyl group. R ^3x and R ^4x each independently represents a linear or branched alkylene group having 2 to 4 carbon atoms. mx and nx each independently represents 0 to 10. However, 1 ≦ (mx + nx) ≦ 10 is satisfied. ]

[5] Any one of [1] to [4], wherein at least one of the di (meth) acrylic monomers constituting the acrylic monomer (X) is a compound represented by the following general formula (x-2) The photocurable composition as described in any one.

[In general formula (x-2), R ^5x , R ^6x , R ^7x , R ^8x , R ^11x , and R ^12x each independently represent a hydrogen atom or a methyl group. mx and nx each independently represents 0 to 10. However, 1 ≦ (mx + nx) ≦ 10 is satisfied. ]

[6] At least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is a compound represented by the following general formula (d-1) [1] to [5 ] The photocurable composition as described in any one of.

[In general formula (d-1), R ^1d represents a hydrogen atom or a methyl group. R ^2d represents a single bond or a linear or branched alkylene group having 1 to 5 carbon atoms. R ^3d represents a single bond, an ether bond (—O—), an ester bond (—O— (C═O) —), or —C ₆ H ₄ —O—. A ^1d represents an aromatic ring which may have a substituent. nd represents 1 to 2. ]

[7] The light according to [6], wherein at least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is a compound represented by the following general formula (d-2): Curable composition.

[In general formula (d-2), R ^1d , R ^4d and R ^5d each independently represents a hydrogen atom or a methyl group. A ^2d represents an aromatic ring which may have a substituent. nd represents 1 to 2. ]

[8] At least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is a compound represented by the following general formula (d-3) [1] to [5 ] The photocurable composition of any one of.

[In general formula (d-3), R ^6d represents a hydrogen atom or a methyl group, and R ^7d represents a single bond or a methylene group. A ^3d represents a ring structure other than at least one aromatic ring. ]

[9] The ring structure other than the aromatic ring is a ring structure having a dicyclopentenyl skeleton, a dicyclopentanyl skeleton, a cyclohexane skeleton, a tetrahydrofuran skeleton, a morpholine skeleton, an isobornyl skeleton, a norbornyl skeleton, a dioxolane skeleton, or a dioxane skeleton. 8] The photocurable composition according to item 8.
[10] At least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) includes at least one ring structure, one hydroxyl group, and one ( The photocurable composition according to any one of [1] to [5], which is a (meth) acrylic monomer having a (meth) acryloyloxy group.
[11] The photocurable composition according to any one of [1] to [6], wherein the (meth) acrylic monomer (D) is o-phenylphenol EO-modified acrylate.
[12] The photocurable composition according to any one of [1] to [6], wherein the (meth) acrylic monomer (D) is 3-phenoxybenzyl acrylate.

[13] The content of the acrylic monomer (X) is any one of [1] to [12], which is 200 parts by mass or more with respect to 1000 parts by mass of the total content of the (meth) acrylic monomer components. Photocurable composition.
[14] Any one of [1] to [13], wherein the content of the acrylic monomer (D) is 30 parts by mass to 800 parts by mass with respect to 1000 parts by mass of the total content of the (meth) acrylic monomer components The photocurable composition as described in one.
[15] The photocurable composition according to any one of [1] to [14], wherein the photopolymerization initiator is at least one selected from alkylphenone compounds and acylphosphine oxide compounds.
[16] Any one of [1] to [15], wherein the content of the photopolymerization initiator is 1 part by mass to 50 parts by mass with respect to a total content of 1000 parts by mass of the (meth) acryl monomer component The photocurable composition as described in 2. above.

[17] The photocurable composition according to any one of [1] to [16], wherein the viscosity at 25 ° C. and 50 rpm is 20 mPa · s to 3000 mPa · s, measured using an E-type viscometer. object.
[18] The photocurable composition according to any one of <1> to <17>, which is used for producing an artificial nail by stereolithography.
[19] An artificial nail that is a cured product of the photocurable composition according to [18].

Moreover, the specific aspect of the production | generation method of the modeling data which can manufacture an artificial nail with high precision, the manufacturing method of an artificial nail, and the manufacturing system of an artificial nail is as follows.
<1> a reception step of receiving shape information that can specify a three-dimensional outer shape of the artificial nail to be formed;
After the optical modeling is performed by the three-dimensional modeling apparatus on the basis of the three-dimensional modeling data and the predetermined modeling information, the contraction state generated in the model that is photocured by the curing apparatus under the predetermined curing condition is set to predetermined prediction information. A prediction step to predict based on,
The three-dimensional shape data of the artificial nail to be formed obtained from the shape information is corrected based on the prediction result of the prediction step, and the three-dimensional modeling device is used to optically model the artificial nail to be formed. A generation step for generating three-dimensional modeling data;
An output step of outputting the modeling data generated by the generating step;
Method of generating modeling data including

<2> The prediction information includes modeling information indicating modeling conditions including an optical modeling material used for optical modeling in the three-dimensional modeling apparatus, and curing information indicating the curing conditions. Generation method of modeling data.
<3> The prediction information includes shape data of the artificial nail manufactured in advance, modeling data generated from the shape data, and after curing of a model that is optically modeled and photocured based on the modeling data <1> or <2> forming data generation method including three-dimensional post-curing data indicating the outer shape of the.

<4> An acquisition step of acquiring three-dimensional post-curing data indicating an external shape after curing of a modeled object that is optically modeled and photocured based on the modeling data;
Generated based on the post-curing data acquired in the acquiring step, shape data of the artificial nail to be formed with respect to the post-curing data, a prediction result predicted in the prediction step for the shape data, and the prediction result An update step of updating the prediction information based on the modeling data that has been made,
A method for generating modeling data according to any one of <1> to <3>.

<5> including a synthesis step of synthesizing the modeling data of the plurality of artificial nails to be formed so that the plurality of artificial nails to be formed are arranged on a substrate and are integrally formed by the three-dimensional modeling apparatus. <1> to <4> any modeling data generation method.
<6> The method for generating modeling data according to <5>, wherein the synthesizing step includes providing identification information for identifying each of the plurality of artificial nails to be formed with data for forming on the substrate.
<7> The synthesis step synthesizes the modeling data so that a plurality of the substrates each having the plurality of artificial nails to be formed are arrayed in parallel by the three-dimensional modeling apparatus <5 > Or <6> modeling data generation method.

<8> a reception step of receiving shape information that can specify a three-dimensional outer shape of the artificial nail to be formed;
After the optical modeling is performed by the three-dimensional modeling apparatus on the basis of the three-dimensional modeling data and the predetermined modeling information, the contraction state generated in the model that is photocured by the curing apparatus under the predetermined curing condition is set to predetermined prediction information. A prediction step to predict based on,
The three-dimensional shape data of the artificial nail to be formed obtained from the shape information is corrected based on the prediction result of the prediction step, and the three-dimensional modeling device is used to optically model the artificial nail to be formed. A generation step for generating three-dimensional modeling data;
Based on the modeling data generated by the generating step, a modeling step of generating a modeled object by the three-dimensional modeling apparatus;
A curing step for further photocuring the modeled object modeled by the modeling step;
A method of manufacturing an artificial nail including

<9> An acquisition step of acquiring three-dimensional post-curing data indicating the outer shape of the modeled object from the modeled model after photocuring by the curing step;
By comparing the post-curing data and the shape data of the artificial nail to be formed, an evaluation step for evaluating the molded object after the curing,
The method for producing an artificial nail according to <8>, comprising:
<10> The method for manufacturing an artificial nail according to <9>, including an update step of updating the prediction information based on an evaluation result of the evaluation step.
<11> Prior to the curing step, the method includes <8> to <10>, including a cleaning step of removing excess optical modeling material used for optical modeling of the modeled object from the modeled object formed by the modeling step. Any artificial nail manufacturing method.

<12> a three-dimensional modeling apparatus that performs optical modeling of a three-dimensional model based on the input three-dimensional modeling data;
A curing device for photocuring the modeled object that is optically modeled by the three-dimensional modeling apparatus;
A receiving unit that accepts shape information that can specify the three-dimensional outer shape of the artificial nail to be formed, three-dimensional modeling data, and optical modeling by the three-dimensional modeling apparatus based on predetermined modeling information, and predetermined curing conditions A prediction unit for predicting a contraction state generated in a molded article photocured by the curing device based on prediction information stored in advance, the three-dimensional shape of the artificial nail to be formed obtained from the shape information The generation unit that corrects data based on the prediction result of the prediction unit, and generates three-dimensional modeling data for optical modeling of the artificial nail model to be formed by the three-dimensional modeling apparatus, and the modeling data A modeling design apparatus including an output unit that outputs to the three-dimensional modeling apparatus;
Artificial nail manufacturing system having

<13> The prediction information includes the three-dimensional modeling apparatus, modeling information indicating modeling conditions including an optical modeling material used for modeling in the three-dimensional modeling apparatus, and curing information indicating the curing conditions <12>. Artificial nail manufacturing system.
<14> In the prediction information stored in the modeling design apparatus, the shape data of the artificial nail manufactured in advance, the modeling data generated from the shape data, and the optical modeling is performed based on the modeling data. <12> or <13> artificial nail manufacturing system including three-dimensional post-curing data indicating an external shape of the cured model after curing.
<15> The modeling design apparatus includes:
An acquisition unit that acquires three-dimensional post-curing data indicating the outer shape of the modeled object that has been optically modeled and photocured based on the modeling data;
Generated based on the post-curing data acquired in the acquisition unit, shape data of the artificial nail to be formed with respect to the post-curing data, a prediction result predicted by the prediction unit for the shape data, and the prediction result An update unit that updates the prediction information based on the modeling data that has been created;
The artificial nail manufacturing system according to any one of <12> to <14>.

<16> The modeling design apparatus includes:
<12> including a synthesizing unit that synthesizes the modeling data of the plurality of artificial nails to be formed so that the plurality of artificial nails to be formed are arranged on a substrate and are integrally formed by the three-dimensional modeling apparatus. To <15> of the artificial nail manufacturing system.
<17> The synthetic part of the modeling design device includes providing identification information for identifying each of the plurality of artificial nails to be formed with data formed on the substrate. <16> Nail production system.
<18> The synthesis unit of the modeling design apparatus uses the modeling data so that the plurality of substrates each having the plurality of artificial nails to be formed are modeled in parallel by the three-dimensional modeling apparatus. <16> or <17> artificial nail production system to be synthesized.

<19> An acquisition unit that acquires three-dimensional post-curing data indicating the external shape of the modeled object from the modeled article that has been photocured by the curing device, and the data after the curing and the shape of the artificial nail to be formed The artificial nail manufacturing system according to any one of <12> to <18>, including an evaluation device that includes an evaluation unit that evaluates the cured object after comparing with data.
<20> The artificial nail manufacturing system according to <19>, wherein the modeling design device includes an update unit that updates the prediction information based on an evaluation result of the evaluation unit of the evaluation device.

As described above, according to an embodiment of the present invention, modeling data capable of manufacturing an artificial nail with high accuracy can be obtained. Moreover, according to one Embodiment of this invention, an artificial nail can be manufactured with high precision.

According to one embodiment of the present invention, there is provided a photocurable composition that is used for optical modeling and is excellent in bending strength and bending elastic modulus and further in bending resistance and elongation after photocuring.
Moreover, according to one embodiment of the present invention, there is provided an artificial nail which is a cured product of the above-mentioned photocurable composition, which is excellent in bending strength and bending elastic modulus, and further excellent in bending resistance and elongation. .

It is a flowchart which shows the manufacturing process of the artificial nail | claw which concerns on this Embodiment. It is a perspective view which shows the outline of the artificial nail to form and the artificial nail after hardening. It is a block diagram which shows the structure of the modeling design system which concerns on this Embodiment. It is a flowchart which shows the manufacturing process of an artificial nail. It is a perspective view which shows an example of the molded article to be optically modeled.

In the present specification, a numerical range expressed using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.
In the present specification, the “ether bond” refers to a bond connecting two hydrocarbon groups with an oxygen atom (that is, a bond represented by —O—) as normally defined. Therefore, “—O—” in an ester bond (ie, —C (═O) —O—) does not correspond to an “ether bond”.
In the present specification, “(meth) acrylic monomer” is a concept including both an acrylic monomer and a methacrylic monomer.
Moreover, in this specification, "(meth) acrylate" is a concept including both acrylate and methacrylate.
In the present specification, the “(meth) acryloyloxy group” is a concept including both an acryloyloxy group and a methacryloyloxy group.

[Photocurable composition]
The photocurable composition which concerns on one Embodiment of this invention is a photocurable composition used for optical modeling, Comprising: It does not have a hydroxyl group and a carboxy group in 1 molecule, but two aromatic rings and two pieces (Meth) acrylic monomer (X) which is at least one selected from di (meth) acrylic monomers having a (meth) acryloyloxy group and has a weight average molecular weight of 400 or more and 800 or less, and at least one in one molecule (Meth) acrylic monomer (D) which is at least one selected from (meth) acrylic monomers having a ring structure of (1) and one (meth) acryloyloxy group and has a weight average molecular weight of 130 to 350, and A photocurable composition containing a photopolymerization initiator.

The photocurable composition according to an embodiment of the present invention includes a combination of the acrylic monomer (X) and the (meth) acrylic monomer (D), so that the bending strength and the flexural modulus are increased after photocuring. It excels in bending resistance and elongation.
Therefore, an optically shaped article produced by optical shaping using the photocurable composition of the present embodiment, preferably an artificial nail, is also excellent in bending strength and bending elastic modulus, and further excellent in bending resistance and elongation. . Furthermore, the photocurable composition of the present embodiment has a viscosity suitable for production of artificial nails and the like by optical modeling (that is, examples of preferred forms of optical modeling, the same applies hereinafter), and bends after photocuring. The strength, bending elastic modulus, bending resistance, tensile strength, and elongation rate are preferable ranges for the artificial nail. That is, the photocurable composition of the present embodiment can be a photocurable artificial nail composition.

In this specification, the “(meth) acrylic monomer component” refers to the entire (meth) acrylic monomer contained in the photocurable composition.
The “(meth) acryl monomer component” includes at least the (meth) acryl monomer (X) and the (meth) acryl monomer (D).
The “(meth) acrylic monomer component” may contain other (meth) acrylic monomers.

In the photocurable composition of this embodiment, by including (meth) acryl monomer (X), it replaces with (meth) acryl monomer (X), and does not have a hydroxyl group and a carboxy group in 1 molecule. Compared with the case of containing a (meth) acryl monomer having an aromatic ring and one (meth) acryloyloxy group, the bending strength and the flexural modulus after photocuring are improved.

In the photocurable composition of this embodiment, by including (meth) acryl monomer (X), it replaces with (meth) acryl monomer (X), and does not have a hydroxyl group and a carboxy group in 1 molecule. Compared with the case of containing a di (meth) acryl monomer having an aromatic ring and two (meth) acryloyloxy groups, the phenomenon that the crystallinity of the monomer becomes too high is suppressed, and the viscosity of the photocurable composition Is reduced.

In the photocurable composition of this embodiment, by containing (meth) acryl monomer (X), it replaces with (meth) acryl monomer (X), and does not have a hydroxyl group and a carboxy group in 1 molecule, but three Compared with the case where the (meth) acryl monomer which has the above aromatic ring is used, the viscosity of a photocurable composition is reduced.

In the said photocurable composition, it replaces with the (meth) acryl monomer (X) by containing the (meth) acryl monomer (X), and does not have a hydroxyl group and a carboxy group in 1 molecule, but 3 or more ( Compared with the case of using a (meth) acryl monomer having a (meth) acryloyloxy group, the bending resistance, tensile strength and elongation after photocuring are improved.

Moreover, 800 which is the upper limit of the weight average molecular weight of the (meth) acrylic monomer (X) is an upper limit provided from the viewpoint of bending strength and bending elastic modulus after photocuring.
In addition, 400 which is the lower limit of the weight average molecular weight of the (meth) acrylic monomer (X) is a lower limit provided from the viewpoint of ease of production or availability of the monomer.

Furthermore, in the photocurable composition of this embodiment, the bending resistance after photocuring improves by including a (meth) acryl monomer (D). Further, by including the meth) acrylic monomer (D), the bending strength, bending elastic modulus, bending resistance, tensile strength and elongation rate after photocuring are excellent in a well-balanced manner.
The reason is not clear, but the (meth) acrylic monomer (D) has at least one ring structure, so that the ring structure of the (meth) acrylic monomer (X) and the ring structure of the (meth) acrylic monomer (D) It is considered that the bending resistance is improved by increasing the intermolecular force and the intermolecular force between the ring structures of the (meth) acrylic monomer (D).
350 which is the upper limit of the weight average molecular weight of the (meth) acrylic monomer (D) is an upper limit provided from the viewpoint of bending strength and bending elastic modulus after photocuring.
130, which is the lower limit of the weight average molecular weight of the (meth) acrylic monomer (D), is a lower limit provided from the viewpoint of ease of production or availability of the monomer.

The photocurable composition of the present embodiment preferably satisfies the following bending strength (bending strength) and the following bending elastic modulus after photocuring from the viewpoint of practicality of the obtained artificial nail and the like.
That is, the photocurable composition of the present embodiment is shaped into a size of 80 mm × 10 mm × thickness 4 mm to form a modeled object, and the resulting modeled object is irradiated with ultraviolet light under the condition of 5 J / cm ^2. When it is cured to form an optically shaped article (that is, a cured article, the same applies hereinafter), and the bending strength (bending strength) is measured according to ISO 178 (or JIS K7171), this bending strength (bending strength) Is preferably 10 MPa or more, more preferably 40 MPa or more, and even more preferably 60 MPa or more.
Moreover, the photocurable composition of this embodiment is shaped into a size of 80 mm × 10 mm × thickness 4 mm to form a modeled object, and the resulting modeled object is irradiated with ultraviolet rays under the condition of 5 J / cm ^2. When it is cured to form an optically shaped article and the bending elastic modulus is measured in accordance with ISO 178 (or JIS K7171), the bending elastic modulus is preferably 400 MPa or more, more preferably 1500 MPa or more. More preferably, 2000 MPa or more is satisfied.

The photocurable composition of the present embodiment preferably satisfies the following bending resistance after photocuring from the viewpoint of practicality of the obtained artificial nail and the like.
That is, using a 3D printer, the photo-curable resin composition was shaped to have an outer diameter of 8 mm, an inner diameter of 7.5 mm (thickness of 0.5 mm), a circumference of 90 °, and a length of 15 mm, and a wavelength of 365 nm. It is made into an optically modeled object by irradiating with ultraviolet rays under the condition of 5 J / cm ² to be hardened, and five obtained objects are placed under a metal cube having a length of 50 mm, a width of 50 mm, and a height of 50 mm. After applying a load of 20 kg weight from the top, it is preferable to maintain the shape without breaking the five pieces when it is visually confirmed whether or not it is broken.

In addition, the photocurable resin composition of the present embodiment is shaped using a 3D printer with an outer diameter of 8 mm, an inner diameter of 7 mm (thickness is 1.0 mm), a circumference of 90 °, and a length of 15 mm. Irradiated with 365-nm ultraviolet light under the condition of 5 J / cm ² to be fully cured to obtain an optically modeled object, and five obtained modeled objects are placed under a metal cube having a length of 50 mm, a width of 50 mm, and a height of 50 mm. After placing the sheets and applying a 20 kg weight load from the top, it is preferable to maintain the shape without breaking the five pieces when it is visually confirmed whether or not it is broken.

The photocurable composition of the present embodiment preferably satisfies the following tensile strength and elongation after photocuring from the viewpoint of practicality of the obtained artificial nail and the like.
That is, the photo-curable resin composition is shaped into a size of 30 mm × 10 mm × thickness 0.5 mm using a 3D printer, and is fully cured by irradiating ultraviolet rays having a wavelength of 365 nm under the condition of 5 J / cm ^2. In accordance with the method described in ISO527-1 (or JIS K7161), the obtained modeled object (that is, a tensile test piece) is obtained by using a tensile test apparatus and a distance between chucks of 20 mm, The tensile strength is preferably 15 MPa or more, more preferably 40 MPa or more when the tensile test piece is broken, measured at a tensile speed of 5 mm / min. Further, the elongation when the tensile test piece is broken is preferably 10% or more, more preferably 20% or more.

Further, the glass transition temperature (Tg) after photocuring of the photocurable composition of the present embodiment is not particularly limited, but from the viewpoint of a balance of bending strength, bending elastic modulus, bending resistance, tensile strength and elongation, The glass transition temperature (Tg) after photocuring is preferably 20 to 100 ° C., more preferably 40 to 80 ° C.

In the present embodiment, “optical modeling” is one type of three-dimensional modeling method using a 3D printer.
Examples of stereolithography include an SLA (Stereo Lithography Apparatus) system, a DLP (Digital Light Processing) system, and an inkjet system.
The photocurable composition of the present embodiment is particularly suitable for SLA type or DLP type optical modeling.

In one embodiment of the present invention, “optical modeling” is modeling (manufacturing of a modeled object) using an optical modeling material as a modeling material in modeling a three-dimensional image using a modeling material. Further, in the present embodiment, “photocuring” means that a modeled object obtained by optical modeling is further cured by light.
The optical modeling in the present embodiment is a kind of a three-dimensional modeling method using a three-dimensional modeling apparatus (hereinafter referred to as a 3D printer). Specific stereolithography methods include an SLA (Stereo Lithography Apparatus) method, a DLP (Digital Light Processing) method, and an inkjet method.

Examples of the SLA method include a method of obtaining a three-dimensional structure by irradiating a photocurable composition with a spot-like ultraviolet laser beam.
When producing an artificial nail or the like by the SLA method, for example, a liquid photocurable composition is stored in a container, and a spot-like ultraviolet laser beam is used so that a desired pattern is obtained on the liquid surface of the liquid photocurable composition. Is selectively irradiated to cure the photocurable composition, a cured layer having a desired thickness is formed on the modeling table, and then the modeling table is moved (that is, raised or lowered) on the cured layer. A liquid photocurable composition for one layer may be supplied and cured in the same manner to repeat a lamination operation for obtaining a continuous cured layer.

Examples of the DLP method include a method of obtaining a three-dimensionally shaped object by irradiating a photocurable composition with planar light. Regarding the method for obtaining a three-dimensionally shaped object by the DLP method, for example, the descriptions in Japanese Patent No. 511880 and Japanese Patent No. 5235556 can be appropriately referred to.
When producing artificial nails, dental prostheses, etc. as shaped objects by the DLP method, for example, a lamp that emits light other than laser light, such as a high pressure mercury lamp, an ultra high pressure mercury lamp, a low pressure mercury lamp, or the like as a light source. A planar drawing mask having a plurality of digital micromirror shutters arranged in a plane is disposed between the light source and the modeling surface of the photocurable composition, and the photocurable composition is interposed through the planar drawing mask. What is necessary is just to sequentially laminate | stack the hardened layer which has a predetermined shape pattern by irradiating light to the modeling surface.

Examples of the inkjet method include a method of obtaining a three-dimensional object by continuously ejecting droplets of a photocurable composition from an inkjet nozzle onto a substrate and irradiating the droplets attached to the substrate with light.
When an artificial nail or the like is produced by an inkjet method, for example, a photocurable composition is ejected from a inkjet nozzle onto a substrate while a head having an inkjet nozzle and a light source is scanned in a plane, and the ejected photocurable composition is ejected. The composition may be irradiated with light to form a cured layer, and these operations may be repeated to sequentially stack the cured layers.

The photocurable composition of the present embodiment has a viscosity at 25 ° C. and 50 rpm, measured using an E-type viscometer, from the viewpoint of suitability for production of artificial nails and the like by stereolithography, from 20 mPa · s to 3000 mPa · s. s is preferable, 20 mPa · s to 1500 mPa · s is more preferable, and 20 to 1200 mPa · s is particularly preferable. The lower limit of the viscosity range is more preferably 30 mPa · s, and particularly preferably 40 mPa · s.

Moreover, you may adjust the viscosity in 25 degreeC and 50 rpm of a photocurable composition according to the system of optical modeling.
For example, when an artificial nail is produced by the SLA method, the viscosity is preferably 20 mPa · s to 3000 mPa · s, more preferably 20 mPa · s to 1500 mPa · s, and more preferably 30 mPa · s to 1200 mPa · s. Particularly preferred is s.
For example, when an artificial nail or the like is produced by the DLP method, the viscosity is preferably 50 mPa · s to 500 mPa · s, and more preferably 50 mPa · s to 250 mPa · s.
For example, when an artificial nail or the like is produced by an ink jet method, the viscosity is preferably 20 mPa · s to 500 mPa · s, and preferably 20 mPa · s to 100 mPa · s.

Next, the components of the photocurable composition of this embodiment will be described.

<(Meth) acrylic monomer (X)>
The (meth) acrylic monomer component in the photocurable composition of this embodiment contains a (meth) acrylic monomer (X).
The (meth) acrylic monomer (X) is at least selected from di (meth) acrylic monomers that do not have a hydroxyl group and a carboxy group in one molecule and have two aromatic rings and two (meth) acryloyloxy groups. It is 1 type and a weight average molecular weight is 400-800.
In the photocurable composition of the present embodiment, the (meth) acrylic monomer (X) mainly contributes to an improvement in bending strength and bending elastic modulus after photocuring.

The (meth) acrylic monomer (X) is one kind of di (meth) acrylic monomer having two aromatic rings and two (meth) acryloyloxy groups without having a hydroxyl group and a carboxy group in one molecule. It may be composed of only the above, or may be a mixture composed of two or more of these di (meth) acrylic monomers.

From the viewpoint of further improving the fracture toughness after photocuring, at least one of the di (meth) acrylic monomers constituting the (meth) acrylic monomer (X) preferably has an ether bond.
Specifically, since at least one of the di (meth) acrylic monomers constituting the (meth) acrylic monomer (X) has an ether bond in one molecule, the degree of freedom of molecular motion is increased, and after photocuring By imparting flexibility to the cured product, the toughness is improved, and as a result, the fracture toughness of the cured product (that is, the fracture toughness after photocuring of the photocurable composition) is improved.

It is more preferable that at least one of the di (meth) acrylic monomers has 1 to 10 ether bonds in one molecule.
In at least one of the di (meth) acrylic monomers, when the number of ether bonds in one molecule is 10 or less, the bending strength and bending elastic modulus after photocuring are further improved.
The number of ether bonds in one molecule is more preferably 2 or more and 6 or less, and more preferably 2 or more and 4 or less from the viewpoint of further improving the bending strength and flexural modulus after photocuring. Particularly preferred.

From the viewpoint of reducing the viscosity of the photocurable composition and further improving the fracture toughness, flexural strength, and flexural modulus after photocuring, at least one of the di (meth) acrylic monomers is described below. More preferred is a compound represented by the formula (x-1).

In general formula (x-1), R ^1x , R ^2x , R ^11x , and R ^12x each independently represent a hydrogen atom or a methyl group. R ^3x and R ^4x each independently represents a linear or branched alkylene group having 2 to 4 carbon atoms. mx and nx each independently represents 0 to 10. However, 1 ≦ (mx + nx) ≦ 10 is satisfied.

If R ^3x are more present in the general formula (x-1), a plurality of R ^3x may be different even in the same. The same applies to R ^4x .

In the general formula (x-1), R ^1x and R ^2x are preferably methyl groups.
R ^3x and R ^4x are each independently preferably an ethylene group, a trimethylene group, a tetramethylene group, a 1-methylethylene group, a 1-ethylethylene group, or a 2-methyltrimethylene group. A 1-methylethylene group is more preferable.
Further, R ^3x and R ^4x are preferably both ethylene, trimethylene, tetramethylene, 1-methylethylene or 2-methyltrimethylene, and both are ethylene or 1-methylethylene. Is more preferable.
Further, mx + nx is 1 to 10, but is particularly preferably 2 to 6 from the viewpoint of further improving the bending strength and bending elastic modulus after photocuring.

At least one of the di (meth) acrylic monomers constituting the (meth) acrylic monomer (X) reduces the viscosity of the photocurable composition, and fracture toughness, flexural strength, and flexural elasticity after photocuring. From the viewpoint of further improving the rate, a compound represented by the following general formula (x-2) is more preferable.

In general formula (x-2), R ^5x , R ^6x , R ^7x , R ^8x , R ^11x , and R ^12x each independently represent a hydrogen atom or a methyl group. mx and nx each independently represents 0 to 10. However, 1 ≦ (mx + nx) ≦ 10 is satisfied.

If R ^5x is more present in the general formula (x-2), a plurality of R ^5x may be be the same or different. The same applies to each of R ^6x , R ^7x , and R ^8x .

In the general formula (x-2), one of R ^5x and R ^6x is a methyl group and the other is a hydrogen atom, and one of R ^7x and R ^8x is a methyl group and the other is A hydrogen atom is preferred.
In the general formula (x-2), it is particularly preferable that R ^5x and R ^8x are both methyl groups, and R ^6x and R ^7x are both hydrogen atoms.

Further, mx + nx is 1 to 10, but 2 to 6 is particularly preferable from the viewpoint of further improving the bending strength and bending elastic modulus after photocuring.

Specific examples of the (meth) acrylic monomer (X) include ethoxylated bisphenol A di (meth) acrylate (EO = 2 mol, 2.2 mol, 2.6 mol, 3 mol, 4 mol, or 10 mol), propoxylated bisphenol A di ( And (meth) acrylate (PO = 2 mol, 3 mol, 4 mol, or 8 mol), ethoxylated bisphenol F di (meth) acrylate (EO = 2 mol, 2.2 mol, 2.6 mol, 3 mol, 4 mol, or 10 mol).
As an example, structural formulas of ethoxylated bisphenol A di (meth) acrylate and ethoxylated bisphenol A dimethacrylate are shown below.

In the photocurable composition of the present embodiment, the content of the (meth) acrylic monomer (X) is reduced in viscosity of the composition and photocured with respect to a total content of 1000 parts by weight of the (meth) acrylic monomer component. From the viewpoint of improving the subsequent bending strength and flexural modulus, it is preferably 200 parts by mass or more, more preferably 300 parts by mass or more, still more preferably 400 parts by mass or more, and 500 parts by mass or more. More preferably, it is more preferably 550 parts by mass or more.
In addition, the content of the (meth) acrylic monomer (X) is not particularly limited as long as it is less than 1000 parts by mass with respect to 1000 parts by mass of the total content of the (meth) acrylic monomer components, but the fracture toughness after photocuring From this viewpoint, it is preferably 950 parts by mass or less, more preferably 900 parts by mass or less, and further preferably 850 parts by mass or less.

<(Meth) acrylic monomer (D)>
The photocurable composition of this embodiment contains a (meth) acryl monomer (D).
The (meth) acrylic monomer (D) is at least one selected from (meth) acrylic monomers having at least one ring structure and one (meth) acryloyloxy group in one molecule, and has a weight average molecular weight. Is 130 or more and 350 or less.
When the (meth) acrylic monomer component contains the (meth) acrylic monomer (D), the bending resistance after photocuring is significantly improved.
The (meth) acrylic monomer (D) may be composed of only one kind of (meth) acrylic monomer having at least one ring structure and one (meth) acryloyloxy group in one molecule. It may be a mixture of two or more of the (meth) acrylic monomers.

At least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is a compound represented by the following general formula (d-1) from the viewpoint of further improving the bending resistance after photocuring It is preferable that

In general formula (d-1), R ^1d represents a hydrogen atom or a methyl group. R ^2d represents a single bond or a linear or branched alkylene group having 1 to 5 carbon atoms. R ^3d represents a single bond, an ether bond (—O—), an ester bond (—O— (C═O) —), or —C ₆ H ₄ —O—. A ^1d represents an aromatic ring which may have a substituent. nd represents 1 to 2. In general formula (d-1), it is preferable that one or two ether bonds or ester bonds (excluding those included in the acryloyloxy group) be included.

Examples of the substituent of the aromatic ring in A ^1d include an alkyl group (for example, a methyl group, an ethyl group, a propyl group, or a butyl group), an aryl group, an alkylaryl group, an aryloxy group, and the like.
Examples of the aromatic ring optionally having a substituent in A ^1d include a phenyl group, a phenyl ether group, a biphenyl group, a terpenyl group, a benzhydryl group, a diphenylamino group, a benzophenone group, a naphthyl group, an anthracenyl group, or a phenanthrenyl group. , Tolyl group, xylyl group, mesityl group, cumyl group, styryl group or nonylphenyl group.
The aromatic ring in A ^1d is preferably a phenyl group, a phenyl ether group, a biphenyl group, a naphthyl group, a cumyl group, or a nonylphenyl group.

Examples of the linear or branched alkylene group having 1 to 5 carbon atoms in R ^2d include, for example, a methylene group, an ethylene group, an n-propylene group, an isopropylene group, an n-butylene group, an isobutylene group, and a sec-butylene. Group, tert-butylene group, n-pentylene group, isopentylene group, neopentylene group, sec-pentylene group, tert-pentylene group or 3-pentylene group. R ^2d is preferably a single bond, a methylene group or an ethylene group.
R ^3d is preferably an ether bond or an ester bond.

Specific examples of the (meth) acrylic monomer represented by the general formula (d-1) include, for example, phenoxyethylene glycol (meth) acrylate, 3-phenoxybenzyl (meth) acrylate, o-phenylphenol EO-modified (meth) Acrylate, o-phenylphenol (meth) acrylate, p-cumylphenol (meth) acrylate, p-nonylphenol (meth) acrylate, p-methylphenol (meth) acrylate, neopentyl glycol- (meth) acrylic acid-benzoic acid Ester, benzyl (meth) acrylate, phenyl (meth) acrylate, phenylglycidyl ether (meth) acrylic acid adduct, phenoxyethylene glycol (meth) acrylate, phenoxydiethylene glycol (meth) acrylate Neopentyl glycol (meth) acrylic acid benzoate, naphthoxy EO modified (meth) acrylate, 2-hydroxyethyl methacrylate, EO modified p-cumylphenol (meth) acrylate or nonylphenol EO modified (meth) acrylate (preferably EO = 1 to 2 mol).
Among these, the (meth) acrylic monomer represented by the general formula (d-1) is particularly preferably o-phenylphenol EO-modified (meth) acrylate or 3-phenoxybenzyl (meth) acrylate. Here, “EO-modified” means having an ethylene oxide unit (ie, —CH ₂ —CH ₂ —O—) structure.
Phenoxyethylene glycol (meth) acrylate, 3-phenoxybenzyl (meth) acrylate, o-phenylphenol EO modified (meth) acrylate (EO = 1 mol), phenylglycidyl ether (meth) acrylic acid adduct, 2-hydroxyethyl methacrylate The structural formula of is shown below.

At least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is represented by the following general formula (d-2) from the viewpoint of further improving the bending resistance, tensile strength, and elongation after photocuring. It is more preferable that it is a compound represented by.

In general formula (d-2), R ^1d , R ^4d and R ^5d each independently represent a hydrogen atom or a methyl group. A ^2d represents at least one aromatic ring which may have a substituent. nd represents 1 to 2. As examples of the aromatic ring in A ^2d and preferable examples of the aromatic ring, those exemplified for A ^1d can be applied as they are.

If in formula (d-2) R ^4d there are a plurality, the plurality of R ^4d may be be the same or different. The same applies to R ^5d .
The weight average molecular weight of the (meth) acrylic monomer (D) is from 130 to 350, preferably from 150 to 300, and more preferably from 150 to 280.

At least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is represented by the following general formula (d-3) from the viewpoint of further improving the bending resistance and elongation after photocuring. It is also preferred that the compound is

In general formula (d-3), R ^6d represents a hydrogen atom or a methyl group, and R ^7d represents a single bond or a methylene group. A ^3d represents a ring structure other than at least one aromatic ring.
The ring structure other than the aromatic ring is not particularly limited, and may be a monocyclic structure or a polycyclic structure. The number of ring members of the ring structure other than the aromatic ring is not limited, but a 5- to 12-membered ring is preferable. The ring structure other than the aromatic ring is preferably an alicyclic structure or a heterocyclic structure. Examples of the hetero atom in the heterocyclic structure include O, S and / or N.

Examples of ring structures other than aromatic rings include, for example, dicyclopentenyl skeleton, dicyclopentanyl skeleton, cyclohexane skeleton, tetrahydrofuran skeleton, morpholine skeleton, isobornyl skeleton, norbornyl skeleton, dioxolane skeleton or dioxane skeleton, cyclopropane skeleton, cyclobutane skeleton, Cyclopentane skeleton, cycloheptane skeleton, cyclooctane skeleton, cyclopropene skeleton, cyclobutene skeleton, cyclopentene skeleton, cyclohexene skeleton, cycloheptene skeleton, cyclooctene skeleton, cyclohexadiene skeleton, cyclooctadiene skeleton, norbornene skeleton, norbornadiene skeleton, norbornane skeleton, Ethyleneimine skeleton, ethylene oxide skeleton, ethylene sulfide skeleton, azacyclobutane skeleton, oxetane skeleton, thietane skeleton, pyrrolidi Skeleton, imidazolidine skeleton, pyrazolidine skeleton, tetrahydrothiophene skeleton, piperidine skeleton, piperazine skeleton, tetrahydropyran skeleton, tetrahydrothiopyran skeleton, azepane skeleton, oxepane skeleton include thiepane skeleton or an imidazoline skeleton.

In addition, at least one of the (meth) acrylic monomers represented by the general formula (d-3) is preferably a compound not containing an imide structure from the viewpoint of suppressing water absorption.
That is, the (meth) acrylic monomer represented by the general formula (d-3) is represented by the following general formula (d-4) from the viewpoint of further improving the bending strength and the flexural modulus after photocuring. More preferably, it is a compound.

In general formula (d-4), R ^6d represents a hydrogen atom or a methyl group. R ^7d represents a single bond or a methylene group. A ^4d represents a ring structure having a dicyclopentenyl skeleton, a dicyclopentanyl skeleton, a cyclohexane skeleton, a tetrahydrofuran skeleton, a morpholine skeleton, an isobornyl skeleton, a norbornyl skeleton, a dioxolane skeleton, or a dioxane skeleton.
In the general formula (d-4), the ring structure represented by A ^4d may have a substituent such as an alkyl group (methyl group, ethyl group, propyl group, butyl group, etc.).

The weight average molecular weight of the (meth) acrylic monomer represented by the general formula (d-4) is 130 or more and 350 or less, preferably 150 or more and 240 or less, and more preferably 180 or more and 230 or less.

Examples of the (meth) acrylic monomer represented by the general formula (d-4) include isobornyl (meth) acrylate, norbornyl (meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclopentanyl (meth) acrylate, Cyclohexyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, (meth) acryloylmorpholine, 4-tert-butylcyclohexanol (meth) acrylate, cyclohexanedimethanol di (meth) acrylate, (2-methyl-2-ethyl 1,3-dioxolan-4-yl) methyl acrylate, cyclic trimethylolpropane formal acrylate, and the like.

In the photocurable composition of the present embodiment, the content of the (meth) acrylic monomer (D) is 30 parts by mass to 800 parts by mass with respect to 1000 parts by mass of the total content of the (meth) acrylic monomer components. It is preferably 50 parts by mass to 700 parts by mass.

The (meth) acryl monomer component in the photocurable composition of the present embodiment is within the range where the effects of the invention are exerted, and other than the (meth) acryl monomer (X) and (meth) acryl monomer (D) described above. The (meth) acryl monomer may be included.
However, the total content of the (meth) acrylic monomer (X) and the (meth) acrylic monomer (D) in the (meth) acrylic monomer component is 60% by mass or more based on the total amount of the (meth) acrylic monomer component. Preferably, it is 80% by mass or more, and more preferably 90% by mass or more. The total content may be 100% by mass with respect to the total amount of the (meth) acrylic monomer component.

<Photopolymerization initiator>
The photocurable composition of the present embodiment contains a photopolymerization initiator.
The photopolymerization initiator is not particularly limited as long as it generates radicals by irradiating light, but it is preferably one that generates radicals at the wavelength of light used for optical modeling.
The wavelength of light used for stereolithography is generally 365 nm to 500 nm, but is practically preferably 365 nm to 430 nm, more preferably 365 nm to 420 nm.

Examples of photopolymerization initiators that generate radicals at the wavelength of light used in stereolithography include alkylphenone compounds, acylphosphine oxide compounds, titanocene compounds, oxime ester compounds, benzoin compounds, and acetophenone compounds. Compound, benzophenone compound, thioxanthone compound, α-acyloxime ester compound, phenylglyoxylate compound, benzyl compound, azo compound, diphenyl sulfide compound, organic dye compound, iron-phthalocyanine compound, benzoin Examples include ether compounds and anthraquinone compounds.
Of these, alkylphenone compounds and acylphosphine oxide compounds are preferred from the viewpoint of reactivity and the like.

Examples of the alkylphenone compounds include 1-hydroxy-cyclohexyl-phenyl-ketone (Irgacure 184: manufactured by BASF).
Examples of the acylphosphine oxide compound include bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (Irgacure 819: manufactured by BASF), 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide ( Irgacure TPO: manufactured by BASF).
The structural formulas of bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (Irgacure 819: manufactured by BASF) and 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide (Irgacure TPO: manufactured by BASF) are shown below. Shown in

The photocurable composition of this embodiment may contain only 1 type of photoinitiators, and may contain 2 or more types.
The content of the photopolymerization initiator in the photocurable composition of this embodiment (the total content in the case of two or more) is 1 with respect to 1000 parts by mass of the total content of the (meth) acryl monomer component. It is preferably from 50 parts by weight to 50 parts by weight, more preferably from 2 parts by weight to 30 parts by weight, even more preferably from 3 parts by weight to 25 parts by weight.

<Other ingredients>
The photocurable composition of this embodiment may contain at least one other component other than the (meth) acrylic monomer component and the photopolymerization initiator, if necessary.
However, the total content of the (meth) acrylic monomer component and the photopolymerization initiator is preferably 60% by mass or more, more preferably 80% by mass or more, based on the total amount of the photocurable composition. More preferably, it is 90 mass% or more.

Examples of other components include coloring materials.
For example, when using the photocurable composition of this embodiment for production of an artificial nail, from a viewpoint of aesthetics, you may color by a desired color tone by making a photocurable composition contain a coloring material.
Examples of the color material include pigments, dyes, and pigments. More specifically, examples of the coloring material include synthetic tar dyes, aluminum lakes of synthetic tar dyes, inorganic pigments, and natural dyes.

As other components, other curable resins other than the above (meth) acrylic monomer component (for example, other curable monomers other than the above (meth) acrylic monomer component, etc.) may also be mentioned.

Moreover, a thermal polymerization initiator is also mentioned as another component.
When the photocurable composition of the present embodiment contains a thermal polymerization initiator, it is possible to use photocuring and thermosetting together. Examples of the thermal polymerization initiator include a thermal radical generator and an amine compound.

Other components include coupling agents such as silane coupling agents (eg 3-acryloxypropyltrimethoxysilane), rubber agents, ion trapping agents, ion exchange agents, leveling agents, plasticizers, antifoaming agents, etc. These additives may be mentioned.

The method for preparing the photocurable composition of this embodiment is not particularly limited, and the acrylic monomer (X), the (meth) acrylic monomer (D), and the photopolymerization initiator (and other components as necessary) are mixed. A method is mentioned.
Means for mixing each component is not particularly limited, and examples thereof include means such as dissolution by ultrasonic waves, a double-arm stirrer, a roll kneader, a twin screw extruder, a ball mill kneader, and a planetary stirrer.
The photocurable composition of the present embodiment may be prepared by mixing components and removing the impurities by filtering with a filter and further performing a vacuum defoaming treatment.

[Photocured product]
In performing photocuring using the photocurable composition of this embodiment, it does not restrict | limit in particular, Any of a well-known method and apparatus can be used. For example, by repeating a step of forming a thin film made of the photocurable composition of the present embodiment and a step of irradiating the thin film with light to obtain a hardened layer, a plurality of hardened layers are laminated and desired. The method of manufacturing the photocured material of the shape of is mentioned. The obtained photocured product may be used as it is, or may be used after post-curing by light irradiation, heating or the like to improve its mechanical properties, shape stability and the like.

[Artificial nails]
As a hardened | cured material (namely, optical modeling thing) of the photocurable composition of this embodiment, an artificial nail is especially preferable. The artificial nail that is a cured product of the photocurable composition of the present embodiment is excellent in bending strength, bending elastic modulus, bending resistance, tensile strength, and elongation.
The size of the artificial nail of the present embodiment is not particularly limited, and an artificial nail having a desired size can be manufactured. Moreover, the artificial nail of this embodiment may be a set.
Further, only a part of the artificial nail of the present embodiment may be manufactured using the photocurable composition of the present embodiment, and the entire artificial nail is manufactured using the photocurable composition of the present embodiment. Also good.

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the “apparatus” (that is, the device) may be a device having a predetermined function, may exist as an independent device, or may be a part of a device having other functions. May be present. For example, a 3D modeling device, a curing device, a light curing device, a modeling design device, a 3D shape measuring device, and an evaluation device exist in any form as long as each has the function described in the location described. You may do it. For example, the photocuring apparatus may be a device having a light irradiation function incorporated in a 3D printer, or may be an apparatus independent of the 3D printer.
FIG. 1 shows an outline of the manufacturing process of the artificial nail according to the present embodiment. The manufacturing process of the artificial nail according to the present embodiment includes a shape acquisition process 80 as a reception part, a design process 82 as a design part, a modeling process 84 as a modeling part, a cleaning process 86, and a curing process 88 as a curing part. Including. The artificial nail is manufactured as a plain artificial nail that has not been decorated through a shape acquisition process 80, a design process 82, a modeling process 84, a cleaning process 86, and a curing process 88. In the present embodiment, the cleaning process 86 may be included in the modeling process 84 as a post-process of the modeling process 84, and the cleaning process 86 is included in the curing process 88 as a pre-process of the curing process 88. May be.

In the present embodiment, a rapid prototype method is applied to create a three-dimensional image of an artificial nail (that is, a three-dimensional model, hereinafter also referred to as a modeled object) based on three-dimensional data (hereinafter also referred to as modeled data). . As modeling techniques, binder injection method, directed energy volume method, material extraction method, material injection method, powder bed fusion method, sheet lamination method, liquid tank photopolymerization method, additive manufacturing method, stereolithography method, Any of a powder shaping method, a hot melt lamination method, an ink jet method, and the like may be applied.

In the modeling process 84 according to the present embodiment, a photo-curable composition is used as an optical modeling material, and a modeled object that is an artificial nail is manufactured by optical modeling. The method of stereolithography and the viscosity of the photocurable composition are as described above.

In the modeling process 84 according to the present embodiment, a 3D printer to which any of the SLA method, the DLP method, and the inkjet method is applied is used, and the 3D printer operates with three-dimensional data (hereinafter, modeling data). To produce a model. Note that methods other than the SLA method, the DLP method, and the ink jet method may be applied to the 3D printer.

In the washing process 86, the surplus photocurable composition is washed away and removed from the molded article manufactured by optical modeling using the photocurable composition in the modeling process 84. That is, the uncured photocurable composition adhering to the modeled object is removed.

In the curing step 88 according to the present embodiment, the photocurable composition is further photocured to finish the artificial nail. In the curing step 88, photocuring is performed on the modeled object based on preset photocuring conditions. The curing conditions include designation of a photocuring apparatus and designation of operating conditions of the photocuring apparatus. In the curing step 88, the artificial nail is manufactured by performing photocuring on the modeled object based on the operating condition set in the curing condition using the photocuring apparatus specified in the curing condition.
In the present embodiment, as light (for example, laser light) applied to stereolithography and photocuring, light having an arbitrary wavelength can be applied, but light having a wavelength capable of obtaining relatively high light energy is preferable. For example, the wavelength is more preferably 320 nm to 420 nm. Thereby, the energy efficiency in the case of optical modeling and photocuring can be improved, and optical modeling and photocuring can be performed effectively.

The shape acquisition step 80 receives shape information related to the shape and dimensions of the artificial nail to be formed. The shape information on the shape and dimensions of the artificial nail to be formed includes the outer shape, length, width, thickness, degree of warpage (that is, curvature) in the length direction, and degree of warpage in the width direction. It is preferable that information that can specify the included three-dimensional shape is included. Such artificial nail shape information includes at least three-dimensional data indicating the shape of the surface (hereinafter referred to as the back surface of the artificial nail) in contact with the surface of a human nail (hereinafter referred to as the nail), and the artificial nail to be formed. Information including the thickness at each position on the back surface of the nail is applied. That is, the shape information of the artificial nail includes three-dimensional data (hereinafter referred to as shape data) that can specify the three-dimensional shape (that is, the outer shape) of the artificial nail to be formed or data that can generate shape data. In addition, the back surface of the artificial nail includes a surface (for example, a surface protruding from the toe) deviated from the nail.

The shape acquisition step 80 not only accepts shape information about the shape and dimensions of the artificial nail to be formed, but also uses the three-dimensional shape measuring device (that is, a 3D scanner) to obtain shape information about the shape and size of the artificial nail to be formed. You may read and acquire.
It is preferable that the shape information of the artificial nail acquired in the shape acquisition step 80 includes information for specifying the requester and the attachment target of the artificial nail to be formed. That is, the shape information of the artificial nail to be formed includes information (for example, customer information) that identifies the customer who is intended to be worn on the fingernail of the finger or the customer who requested the formation of the artificial nail. Is preferred. The shape information includes at least information indicating whether the finger is to be worn on the left or right limb, the first finger (that is, the thumb, the thumb), the second finger (that is, the index finger, the index finger), the first Information (that is, target information) indicating which of the three fingers (that is, the middle finger), the fourth finger (that is, the ring finger), and the fifth finger (that is, the little finger) is attached is included. preferable.

In the shape acquisition step 80, information specifying the requester and the target for attaching the artificial nail to be formed is input, and the input information is received as shape information of the artificial nail.
Furthermore, in the shape information acquired in the shape acquisition process 80, the optical modeling material (for example, component contained in a photocurable composition or a photocurable composition) used for the optical modeling of an artificial nail, it uses for optical modeling. The designation of a 3D printer and the designation of curing conditions may be included. In this case, in the shape acquisition step 80, the input designation is accepted as the shape information of the artificial nail by inputting the stereolithography material, the designation of the 3D printer, and the designation of the curing condition.

In the design step 82, three-dimensional shape data of the artificial nail formed from the artificial nail shape information is generated. In the design process 82, modeling data used for the modeling process 84 is generated from the generated shape data.
The design process 82 sets the modeling conditions in the modeling process 84. The modeling conditions include the setting (or designation) of a 3D printer as a three-dimensional modeling apparatus used for manufacturing a modeled object in the modeling process 84, and the wavelength of light when operating the 3D printer (for example, the center wavelength or wavelength band). ), Setting of light intensity, irradiation time and the like. The modeling conditions include a photocurable composition used for optical modeling.

In the case where the shape information of the artificial nail to be formed includes the designation of the 3D printer and the designation of the modeling conditions, the design process 82 specifies the 3D printer and the modeling conditions based on the shape information of the artificial nail to be formed. . In addition, when the 3D printer specification and the modeling condition specification are not included in the shape information of the artificial nail to be formed, the 3D printer and the modeling condition are input and specified in the design process 82 or set in advance. The selected combination is selected and specified.

Furthermore, the design process 82 designates the curing conditions in the curing process 88. The curing conditions include designation of a photocuring device as a curing device used for photocuring of a modeled object in the curing step 88, and a wavelength of light (for example, laser light) when operating the photocuring device (that is, center wavelength or Wavelength band), light intensity, light irradiation time, and the like. The setting of the curing condition is performed based on the shape information of the artificial nail to be formed when the shape information of the artificial nail to be formed includes the designation of the photocuring device and the designation of the curing condition. When the shape information of the artificial nail to be formed does not include the designation of the photocuring device and the designation of the curing condition, the design process 82 specifies the curing condition by the same method as the modeling condition.

In the design process 82, when generating the modeling data from the shape data, the size and shape of the artificial nail as the modeled object after curing are predicted based on the modeling conditions, the curing conditions, and the prediction information set in advance. The modeling data is generated so that the predicted size and shape of the artificial nail match the size and shape of the artificial nail to be formed (including a state that can be regarded as substantially matching).
Thereby, in the modeling process 84, a model is manufactured by optical modeling based on the modeling data and modeling conditions generated in the design process 82, and in the curing process 88, modeling is performed based on the curing conditions specified in the design process 82. Photocuring the object. An artificial nail excellent in bending strength and bending elastic modulus can be obtained by further photocuring the optically modeled object to produce an artificial nail.

On the other hand, an evaluation step 90 is provided in the manufacturing process of the artificial nail in the present embodiment. In the evaluation step 90, it is evaluated whether or not an artificial nail having the same size (dimension) and shape as the artificial nail to be formed has been manufactured. At this time, in the evaluation step 90, after obtaining the post-curing data as the three-dimensional data of the molded article after curing (for example, after photocuring in the curing step 88), the shape data of the artificial nail formed from the design step 82 and Get modeling data. In the evaluation step 90, the manufactured artificial nail is evaluated by collating (or comparing) the post-curing data and the shape data.
In the evaluation step 90, when it is evaluated that the size and shape of the manufactured artificial nail are the same as the size and shape of the artificial nail formed, the manufactured artificial nail is delivered to the customer as a product.

In FIG. 2, an outline of the artificial nail is shown in a perspective view, an artificial nail 10 represented by shape data is shown by a two-dot chain line, and an artificial nail represented by data after modeling (that is, , The molded article after curing) 12 is indicated by a solid line. FIG. 2 shows the X, Y, and Z axes with the base side of the artificial nails 10 and 12 (that is, the side opposite to the fingertips) set to the Z axis origin side.

Generally, when a modeled object is cured, the modeled object after curing is contracted with respect to the length, width, thickness, and volume of the modeled object after curing. Even in a modeled object that is optically modeled using the photocurable composition, shrinkage occurs compared to before photocuring during the optical modeling and after the photocuring. That is, the modeled object is contracted when it is optically modeled in the modeling process 84 with respect to the modeled data, and at the same time, it is contracted not only when it is photocured in the curing process 88.
The shrinkage of a modeled object in optical modeling and photocuring is affected by the photocurable composition, modeling conditions, curing conditions, and the like used for optical modeling. Moreover, it is also conceivable that the environmental state (for example, temperature and humidity) or the like when the modeled object is photocured and cured affects the shrinkage of the modeled object in the optical modeling and photocuring.
The artificial nail is formed with a thin wall, and has a warp in at least one of the length direction and the width direction so that a surface in contact with the surface of the bare nail (hereinafter also referred to as a back surface of the artificial nail) is concave. For this reason, a slight contraction occurs in the cured artificial nail 12 to change the warp, and the fit when the artificial nail 10 is actually attached to the nail changes.

From this point, in the present embodiment, as the prediction information, based on at least a photocurable composition (or a component of the photocurable composition) used for modeling, modeling conditions, and curing conditions, shrinkage after curing of the modeled object Predict the state. In addition, the prediction information may include environmental information such as temperature and humidity in each of the modeling environment and the curing environment. The predicted contraction state includes changes in warpage due to the thickness of the artificial nail in addition to the dimensions such as length, width, thickness and volume.

In the design process 82 according to the present embodiment, when generating modeling data to be used for optical modeling from the shape data of the artificial nail, a contraction state (for example, contraction amount or contraction rate, change in warpage) generated in the modeled article after curing. And the like, and shape data is corrected based on the predicted contraction state to generate modeling data for the artificial nail. The modeling data indicates that the artificial nail 12 after curing has the same length, width, thickness and volume as the artificial nail 10 to be formed, and the warp generated in the artificial nail 12 is similar to the warp of the artificial nail 10. Is generated as follows.

Further, in the design process 82, the prediction information is updated using the post-curing data of the artificial nail 10 acquired in the evaluation process 90, the modeling conditions for manufacturing the artificial nail 10, and the curing conditions. In addition, it is more preferable to include environmental information in the update of the prediction information.
In the evaluation step 90, when it is evaluated that there is a difference in size, shape, or the like between the artificial nail indicated by the shape data and the artificial nail indicated by the post-curing data after hardening (for example, manufactured) When the artificial nail 12 cannot be regarded as the artificial nail 10), the prediction information is updated, and the modeling data is corrected by recorrecting the shape data of the corresponding artificial nail based on the updated prediction information. The artificial nail 12 is regenerated (that is, remanufactured) based on the regenerated modeling data.

FIG. 3 is a block diagram illustrating a schematic configuration of the modeling design system 20 according to the present embodiment. A CAD (Computer aided design) system is used for the modeling design system 20 of the present embodiment, and a processing function in the design process 82 is carried by the CAD system. The modeling design system 20 preferably includes at least a configuration that bears the processing function of the evaluation step 90, and may include a configuration that bears the processing function of the shape acquisition step 80. Furthermore, the modeling design system 20 may include a configuration that handles each processing function of the modeling process 84 and the curing process 88. The modeling design system 20 of this Embodiment includes the structure which bears the process mechanism in the shape acquisition process 80, the modeling process 84, the hardening process 88, and the evaluation process 90 as an example, and the modeling design system 20 is the artificial nail 10. It also functions as a manufacturing system.

The modeling design system 20 includes an arithmetic processing unit 22 provided with a CPU, a main storage unit 24, an input unit 26, an output unit 28, an auxiliary storage unit 30, and an interface unit 32. The arithmetic processing unit 22, the main storage unit 24, the input unit 26, the output unit 28, the auxiliary storage unit 30, and the interface unit 32 are configured by a computer connected to each other via a bus 34.

The main storage unit 24 stores an operation program (OS) or the like of the arithmetic processing unit 22. The arithmetic processing unit 22 reads out and executes the operation program from the main storage unit 24 so that the modeling design system 20 operates. To do. The input unit 26 includes input devices such as a keyboard, a mouse, and a tablet. The output unit 28 includes output devices such as a display and a printer.

The interface unit 32 of the modeling design system 20 includes a three-dimensional measuring device (that is, a 3D scanner) 36 used as a reading unit when the modeling design system 20 functions as the shape acquisition process 80 and the evaluation process 90, and a modeling process 84. A three-dimensional modeling apparatus (that is, a 3D printer) 38 to be used and a photocuring apparatus 40 as a curing apparatus used for the curing step 88 are connected.
As the 3D printer 38, for example, a desktop 3D printer Form2 (manufactured by Formlabs) or the like is used.

In the present embodiment, the environmental sensor 42 that detects environmental information (for example, the installation environment of the 3D printer 38) such as temperature and humidity during modeling in the modeling process 84 is provided, and at the time of curing in the curing process 88. An environmental sensor 44 that detects environmental information such as temperature and humidity (for example, the installation environment of the photocuring device 40) is provided. Each of the

environmental sensors

42 and 44 is connected to the modeling design system 20.

In the modeling design system 20, the interface unit 32 may be connected to a dedicated communication network such as a LAN (Local Area Network) or a public communication network such as the Internet, which is preferable. In this case, each of the 3D scanner 36, the 3D printer 38, the light curing device 40, and the

environmental sensors

42 and 44 can transmit and receive data (or information) to each other via a dedicated communication network or a public communication network. And can be connected to the modeling design system 20. Accordingly, even if each of the 3D scanner 36, the 3D printer 38, the light curing device 40, and the modeling design system 20 is provided in different places (for example, remote locations), the 3D scanner 36, 3D printer is controlled by the modeling design system 20. 38 and the photo-curing device 40 can be controlled, and the modeling design system 20 can be connected to each of one or a plurality of 3D scanners 36, 3D printers 38, and the photo-curing devices 40, and the artificial nail The manufacturing system can be configured.

As the auxiliary storage unit 30 of the modeling design system 20, for example, a nonvolatile storage medium capable of rewriting information such as a hard disk device is used. For example, a modeling design program 50 such as commercially available CAD software (for example, 3D CAD software) is installed in the auxiliary storage unit 30. The auxiliary storage unit 30 stores a shape acquisition program 52, a modeling program 54, a photocuring program 56, an evaluation program 58, and the like. Further, the auxiliary storage unit 30 is formed with a prediction information database 60 and also stores a prediction program 62 and a learning program 64.

The arithmetic processing unit 22 reads the modeling design program 50 and the shape acquisition program 52 from the auxiliary storage unit 30 and executes them, so that the modeling design system 20 receives the design unit responsible for the design process 82 and the shape acquisition process 80. It functions as a part. The modeling design system 20 functions as a reception unit and a design unit, thereby receiving shape information of the artificial nail and generating shape data from the received shape information. In addition, the modeling design system 20 generates modeling data from the shape data, and sets modeling conditions and curing conditions.

The modeling design system 20 can output modeling data, modeling information, and curing information by the interface unit 32 functioning as an output unit.
In addition, when the arithmetic processing unit 22 executes the modeling program 54, the modeling design system 20 functions as an output unit and functions as a modeling unit responsible for the modeling process 84, and controls the operation of the 3D printer 38. To make an artificial nail.
Furthermore, when the arithmetic processing unit 22 reads and executes the photocuring program 56 and the evaluation program 58, the modeling design system 20 functions as a curing unit responsible for the curing step 88 and an evaluation unit responsible for the evaluation step 90. Thereby, the modeling design system 20 controls the operation of the photocuring device 40 to perform photocuring of the artificial nail to form the artificial nail 12. Further, the modeling design system 20 controls the operation of the 3D scanner 36, acquires post-curing data from the artificial nail 12, and evaluates the acquired post-curing data.

When the arithmetic processing unit 22 reads and executes the learning program 64, the modeling design system 20 functions as a learning unit and constructs (or updates) the database 60. In addition, when the arithmetic processing unit 22 reads and executes the prediction program 62, the modeling design system 20 functions as a prediction unit that predicts shape data or post-curing data for the modeling data from the prediction information stored in the database 60. To do. Moreover, the modeling design system 20 functions as a prediction unit, so that the modeling design system 20 generates modeling data in which the shape data is corrected based on the prediction result.

In the database 60 as prediction information, modeling information and curing information are stored in association with the shape information of the artificial nail. The shape information of the artificial nail stored in the database 60 includes at least shape data indicating the size and shape of the artificial nail to be formed.
The modeling information associated with the shape information of the artificial nail includes at least modeling data applied to the optical modeling, information specifying a 3D printer used for optical modeling based on the modeling data, and a photocurable composition used for optical modeling. Contains identifying information. That is, designation of modeling conditions can be used for modeling information.

Further, the curing information associated with the shape information of the artificial nail includes at least information for identifying the photocuring device 40 used for photocuring, the wavelength of light used for photocuring, the irradiation time of light, and the curing environment (for example, temperature). And humidity). That is, designation of curing conditions can be used for the curing information. Further, the curing information is associated not only with the shape information of the artificial nail but also with the modeling information associated with the shape information of the artificial nail.

Furthermore, the database 60 includes evaluation information of the manufactured artificial nail 12, and the evaluation information is associated with the shape information, modeling information, and curing information of the artificial nail. The evaluation information includes at least post-curing data and information indicating a contracted state as a difference between the modeling data of the modeling information associated with the shape data and the post-curing data. The information indicating the contraction state includes a contraction amount (or contraction rate may be sufficient) generated in the artificial nail 12 and a shape change (for example, a change in warpage).
Further, the shape information of the artificial nail may include customer information for requesting the manufacture of the artificial nail 10, and the database 60 can be identified by identifying the person wearing the artificial nail formed by the customer information. Artificial nails can be manufactured based on stored customer information.

The modeling information may include an environmental state (for example, temperature and humidity) when the artificial nail is modeled. In addition, when curing the modeled artificial nail, it is considered that the curing rate or the like changes depending on the environmental state (for example, temperature and humidity). It is preferable that the environmental conditions (for example, temperature and humidity) are included.

The modeling design system 20 functions as a learning unit to acquire each of the shape information, modeling information, curing information, and evaluation information of the artificial nail, and the shape information, modeling information, curing information, and evaluation information of the artificial nail Each of them is stored in the database 60 in association with each other, and the database 60 is constructed and updated.

Thereby, when the modeling design system 20 functions as a prediction unit, the modeling information and the curing information are set, so that the contraction state is predicted, and the modeling data is set so that the data after curing is the same as the shape data. Generate. Note that an arbitrarily set initial value (for example, default value) may be applied as the initial value of the prediction information stored in advance in the database 60, and average shape information about the fingernail (for example, model data) , Average data or reference data), the evaluation result when modeling with the modeling information and the curing information as a reference may be used.

Next, the production of the artificial nail by the modeling design system 20 (that is, the modeling system) according to the present embodiment will be described with reference to FIG.
For the production of the artificial nail according to the present embodiment, a photocurable composition is used as an optical modeling material. The photocurable composition applied to the present embodiment is not particularly limited as long as it can be used for stereolithography, but it does not have a hydroxyl group and a carboxy group in one molecule described above, and includes two pieces. A (meth) acrylic monomer (hereinafter referred to as (meth)) which is at least one selected from di (meth) acrylic monomers having an aromatic ring and two (meth) acryloyloxy groups and has a weight average molecular weight of 400 to 800. Acrylic monomer (X)), at least one selected from (meth) acrylic monomers having at least one ring structure in one molecule and one (meth) acryloyloxy group, and having a weight average molecular weight. Contains (meth) acrylic monomer (referred to as squid or di (meth) acrylic monomer (D)) that is 130 or more and 350 or less, and a photopolymerization initiator Curable composition.

Note that the wavelength of light (for example, laser light) applied to the optical modeling in the 3D printer 38 and the wavelength of light (for example, laser light) applied to the photocuring in the photocuring device 40 are matched to the photopolymerization initiator. Preferably the wavelength is applied.

As shown in FIG. 4, in manufacturing the artificial nail 10 (or the artificial nail 12 as the artificial nail 10), in the first step 100, the shape information of the artificial nail 10 to be formed is acquired. For obtaining the shape information, for example, when there is a sample of the artificial nail 10 to be formed (for example, a hand of a person having an actual nail), the sample is mounted on the 3D scanner 36 and the nail surface is obtained. The shape is read three-dimensionally (ie, three-dimensionally). Thereby, a three-dimensional image of the sample is obtained, and the shape data 0 of the artificial nail 10 can be constructed from the three-dimensional image of the sample. Such a three-dimensional image may be input to the modeling design system 20 via a dedicated communication line network or a public communication line network.

The shape information of the artificial nail 10 preferably includes customer information and information related to the finger to which the artificial nail 10 is applied. Also, assuming that one artificial nail 10 is set as one set on the assumption that it is attached to each finger of both left and right hands of one person, for example, for each of the ten artificial nails 10, Information for specifying the finger to be worn is also acquired. As an example, the modeling design system 20 will be described on the assumption that ten artificial nails 10 (that is, artificial nails to be attached to each nail of a human right and left finger) are manufactured as one set.

When the photocurable composition used for manufacturing the artificial nail 10 is designated, in step 100, the photocurable composition to be designated (for example, the content of the photocurable composition, the ratio of the content, the photocurable composition). The product name of the product may be accepted. In addition, if there are designations of modeling conditions or curing conditions when manufacturing the artificial nail 10, these designations are accepted in step 100.

In the next step 102, shape data is generated based on the acquired shape information of the artificial nail 10. For the generation of shape data, commercially available 3D CAD software or the like is used, and the shape data can be created from shape information (for example, a three-dimensional image of a sample).

When the shape data is created, in step 104, a contraction state generated in the artificial nail 12 when the artificial nail 12 obtained by photo-curing and photo-curing is manufactured is predicted. At this time, when the photocurable composition, modeling conditions, and curing conditions are specified in the shape information, prediction information (for example, a database) is based on the photocurable composition, modeling conditions, and curing conditions specified in the shape information. 60) The contraction state is read from (or predicted). In addition, when at least one of the photocurable composition, the modeling condition, and the curing condition resin is not specified in the shape information, the unspecified condition is set as the 3D printer 38 connected to the modeling design system 20 and the light. Set according to the curing device 40.

Further, when predicting the contraction state, environment information (for example, temperature and humidity) of the installation environment of the 3D printer 38 used for optical modeling by the

environment sensors

42 and 44 and the installation environment of the photocuring device 40 used for photocuring. More preferably, the environmental information (for example, temperature and humidity) is detected by the

environmental sensors

42 and 44, and the contracted state is predicted including the detected environmental information.
Thereafter, in step 106, modeling data is generated by correcting the shape data based on the predicted contracted state.

Here, an example of generation of modeling data according to the present embodiment will be described with reference to FIG. In FIG. 5, an image of a modeled object that is optically modeled represented by modeling data is shown in a perspective view.

In the present embodiment, when manufacturing one set of artificial nails 10, modeling data is generated so that the two units 70 </ b> L and 70 </ b> R are optically modeled separately for each of the left and right hands. In the

units

70L and 70R,

artificial nails

72A, 72B, 72C, 72D and 72E from the artificial nail 72A on the thumb side to the artificial nail 72E on the little finger side are arranged.

In the present embodiment, a 3D printer 38 to which the SLA method is applied is used. A substantially rectangular flat plate-like base 74 is provided on the platform side of the 3D printer 38, and five bases 76 are provided on the base 74. The artificial nails 72A to 72E are set to be formed on the gantry 76. Further, the artificial nails 72A to 72E are arranged so that the side opposite to the fingertip side is in contact with the gantry 76.

On the other hand, the base 74 is provided with an ID 78 as an identification code for specifying the artificial claws 72A to 72E. As this ID 78, any code that can identify the artificial claws 72A to 72E in each of the

units

70L and 70R can be applied. The ID 78 is different between the

units

70L and 70R, and is set so that the

units

70L and 70R can be clearly identified as a set (that is, one set).

In the present embodiment, an alphabetical array corresponding to the customer name is applied as an example of ID78. Further, ID78L including a sign indicating that it corresponds to the nail of the left hand is applied as ID78 to the unit 70L, and the unit 70R corresponds to the nail of the right hand as ID78. ID78R including the code | symbol which shows is applied.

Specifically, the code for identifying the thumb (that is, the nail of the thumb) is “0”, and the code for identifying the little finger (that is, the nail of the little finger) is “4”. The unit 70L includes an ID 78L including an arrow indicating an arrangement direction from the artificial nail 72A of the thumb to the artificial nail 72E of the little finger together with a reference L0 indicating the artificial nail 72A of the left thumb and a reference L4 indicating the artificial nail 72E of the little finger. Is to be formed. In addition, the unit 70R includes an arrow indicating the arrangement direction from the artificial nail 72A of the thumb to the artificial nail 72E of the little finger, together with the symbol R0 indicating the artificial nail 72A of the left thumb and the symbol R4 indicating the artificial nail 72E of the little finger. Including ID78R is formed.
The three-dimensional data file (for example, STL file) of modeling data formed in this way includes shape data of each artificial nail as modeling data corrected based on the prediction information. In the STL file, data is generated by the 3D printer 38 so as to be optically modeled from the base 74 side.

Further, when a plurality of sets of artificial nails 10 are optically modeled in parallel, each set of

units

70L and 70R is a composite data in which data is arranged so that optical modeling is performed side by side on one platform. An STL file is generated.
When the STL file is generated in this way, the process proceeds to step 108 and the optical modeling process is performed. In the optical modeling process, a photocurable composition set under modeling conditions is used in the 3D printer 38. Thereby, the optical modeling thing by which the photocurable composition was laminated | stacked in layered form (for example, layered form of 100 micrometers in thickness) is obtained. In this stereolithography, each set of artificial nails is formed on each frame 76 of the base 74, and one or a plurality of sets are stereolithographically formed. The modeling design system 20 detects the environmental conditions (for example, environmental temperature and environmental humidity) of the installation environment of the 3D printer 38 at the time of modeling by the environmental sensor 42 and stores the detected environmental conditions in the database 60 for prediction. Include in information.

Here, the time required for the optical modeling in the 3D printer 38 is the vertical movement time of the platform and the irradiation time of light (for example, laser light) at each movement position. For example, if the platform of the 3D printer 38 is of a size capable of optical modeling of 16 sets, even if the time required for optical modeling of 2 sets of artificial nails is 60 minutes, 16 sets, which is 8 times the 2 sets The time required for the optical modeling of the minute artificial nail is about 120 minutes, which is twice as long. Each set is assigned ID 78 to the

units

70L and 70R. For this reason, even if a plurality of sets are optically modeled in parallel, each of the optically modeled artificial nails can be specified without making a mistake.

The manufacturing process of the artificial nail to which the modeling design system 20 applies includes a cleaning process 86. An uncured liquid (that is, a liquid photocurable composition) adheres to the surfaces of the

units

70L and 70R immediately after the optical modeling. For this reason, when the platform is removed from the 3D printer 38, the uncured liquid adhering to the optical modeling object on the platform is scraped off.

In the cleaning step 86, uncured liquid remaining in each of the optically shaped objects (that is, the

units

70L and 70R) without being scraped off at this time is removed. The cleaning step 86 is performed on the artificial nail removed from the platform (that is, the artificial nail unit attached to the base 74 via the mount 76). In the cleaning step 86, for example, an ultrasonic cleaner using ethanol (EtOH), isopropyl alcohol (IPA) or the like as a cleaning liquid is used.

As shown in FIG. 4, in step 110, the photocuring process is performed using the photocuring device 40 on the artificial nail units 70 </ b> L and 70 </ b> R that have been cleaned. The photocuring process is executed with light having a wavelength specified by the curing conditions (for example, laser light), light intensity, and light irradiation time. Thereby, the artificial nail | claw 12 which optically modeled the artificial nail | claw 10 is manufactured.
The modeling design system 20 stores the installation environment of the photocuring device 40 acquired by the environment sensor 44 in the database 60 as prediction information associated with the shape information of the artificial nail 10.

Thereafter, in step 112, each of the

units

70L and 70R of the artificial nail 12 after being cured is mounted on the 3D scanner 36 and read, so that the three-dimensional data of each of the artificial nails 12 formed in the

units

70L and 70R is read. To obtain post-curing data.
In step 114 and step 116, the artificial nail 12 with respect to the artificial nail 10 is evaluated by comparing the post-curing data and the shape data for each artificial nail 12. At this time, the dimensions (for example, length, width, thickness, volume, etc.) and the outer shape (for example, warpage in the length direction and width direction) of the artificial nail 12 indicated by the post-curing data are the artificial nail. Is compared to 10, if each artificial nail 12 matches or can be considered to match the artificial nail 10 (that is, within an allowable error range), it is evaluated as good. A positive determination is made at step 116.

If an affirmative determination is made in step 116, the process proceeds to step 118 and the post-curing data of the artificial nail 12 is stored in the database 60 in association with the shape information of the artificial nail 10. At this time, the data is stored in the database 60 together with the shrinkage information including the shrinkage state of the post-curing data with respect to the modeling data of the artificial nail 10.

On the other hand, in any artificial nail 12, when at least one of the size and shape of the artificial nail 12 indicated by the post-curing data is different from the artificial nail 10 indicated by the shape data (for example, artificial nail 10, when one of the size and shape of the artificial nail 12 exceeds a preset error range), it is evaluated as defective and a negative determination is made in step 116.
If a negative determination is made in step 116, the routine proceeds to step 120. In this step 120, a difference (for example, shrinkage amount or shrinkage rate, degree of warpage) of modeling data with respect to post-curing data is obtained, and shape data (or shape information), modeling data (or modeling information), and It is stored in the database 60 in association with each of the curing information. At the same time, in step 120, the prediction information for the artificial nail 10 is updated.

Thereafter, the process proceeds to step 104, where the shape data of the artificial nail 10 is corrected (or recorrected) based on the updated prediction information to generate modeling data, and the artificial nail 10 is remade. . At this time, although it may be performed in units of sets, in the present embodiment, each

unit

70L, 70R is provided with an ID 78 that can identify each other, so that the artificial nail can be remanufactured in units. . Thereby, if the manufactured artificial nail 12 is evaluated as good, the manufactured artificial nail 12 is delivered (or commercialized) as the artificial nail 10.

Thus, in the modeling design system 20, when generating modeling data from the shape data of the artificial nail 10, the shrinkage state after curing is predicted, and modeling data is generated based on the prediction result. For this reason, the artificial nail | claw 12 used as the artificial nail | claw 10 with high precision can be manufactured. Thereby, the artificial nail | claw 10 with a high fit is obtained.

Moreover, since the prediction information used for prediction includes a photocurable composition based on stereolithography, modeling information according to modeling conditions, and curing information according to curing conditions, not only a contracted state for each optical modeling. In addition, the shrinkage state after photocuring can be predicted with high accuracy. In addition, it is preferable to include environmental information at the time of stereolithography and environmental information at the time of photocuring in the prediction information, and thereby, for example, a contraction state caused by a slight change in curing speed (for example, a difference in environmental information). Can be predicted with high accuracy.

Furthermore, it is preferable that the prediction information includes customer information for specifying the artificial nail 10, so that when a similar artificial nail is requested (or requested), the requested artificial nail 10 is It can be manufactured easily and with high accuracy.

Further, the modeling design system 20 acquires post-curing data, and updates (or learns) the prediction information by associating the shrinkage information including the acquired post-curing data with the shape information. As the number increases, the shrinkage state after photocuring can be predicted with higher accuracy, and the artificial nail 10 can be manufactured with higher accuracy.
In addition, the modeling design system 20 manufactures a large number of artificial nails 12 because the artificial nail 10 for one person is set as one set and the artificial nail 10 and each artificial nail 10 in the set can be specified. It can be made easy and it can be clarified which of the artificial nails 10 each of the artificial nails 12 corresponds to.

In addition, in this Embodiment, although the modeling design system 20 has the processing function with respect to the shape acquisition process 80, the modeling process 84, the hardening process 88, and the evaluation process 90, it is not restricted to this. In addition to the modeling design system 20, a computer for control may be provided in the shape acquisition process 80, the modeling process 84, the curing process 88, and the evaluation process 90. In this case, the computer provided in each of the shape acquisition process 80, the modeling process 84, the curing process 88, and the evaluation process 90 is capable of transmitting and receiving data via a dedicated communication network, a public communication network, or the like. It is preferably connected to the design system 20. Thereby, from the reception of the artificial nail 10 to be formed to the manufacture of the artificial nail 12 as the artificial nail 10 can be easily performed. And the artificial nail | claw 12 used as the artificial nail | claw 10 can be manufactured efficiently and with high precision.

Hereinafter, the present invention will be specifically described by way of examples. However, the present invention is not limited to these examples.

[Examples 1 to 30, Comparative Examples 1 to 7]
<Preparation of photocurable composition>
The components shown in Tables 1 to 4 below were mixed to obtain a photocurable composition.
<Measurement and evaluation>
The following measurements and evaluations were performed using the obtained photocurable composition. The results are shown in Tables 1 to 4.

(Viscosity of photocurable composition)
The viscosity of the photocurable composition was measured with an E-type viscometer at 25 ° C. and 50 rpm.

(Bending strength and flexural modulus of stereolithography)
The obtained photocurable composition was shaped into a size of 80 mm × 10 mm × thickness 4 mm using a 3D printer (Form2 LabForm 2) to obtain a shaped product. The resulting model was irradiated with ultraviolet light having a wavelength of 365 nm under the condition of 5 J / cm ² to be fully cured, thereby obtaining an optical model.
The bending strength and bending elastic modulus of the test piece were measured according to ISO 178 (or JIS K7171), respectively. These measurements were performed using a tensile test apparatus (manufactured by Intesco Corporation) under the conditions of a punch radius of 5 mm, a fulcrum radius of 5 mm, a distance between fulcrums of 64 mm, and an indentation speed of 2 mm / min.

When the photocurable composition is used for producing an artificial nail or the like, the bending strength is preferably 10 MPa or more, and more preferably 40 MPa or more.
In this case, the flexural modulus is preferably 400 MPa or more, and more preferably 1500 MPa or more.

(Bending resistance of stereolithography (when 0.5mm thick))
Using the 3D printer (FormLab company Form2), the obtained photocurable resin composition had an outer diameter of 8 mm, an inner diameter of 7.5 mm (thickness of 0.5 mm), a circumference of 90 °, and a length of 15 mm. An optically shaped article was obtained by shaping into a size and irradiating with ultraviolet rays having a wavelength of 365 nm under the condition of 5 J / cm ² for main curing.

Whether or not the resulting shaped object (hereinafter referred to as “artificial nail 1”) was placed under a metal cube having a height of 50 mm, a width of 50 mm, and a height of 50 mm, and after applying a load of 20 kg weight from above, it was cracked. It was confirmed visually. A total of 5 artificial nails 1 were evaluated. “A” indicates that the shape is maintained without breaking 5 pieces, “B” indicates that the shape is maintained without breaking 2 to 4 pieces, and 1 piece is broken from 0 pieces. The shape retaining the shape was designated as “C”.

(Bending resistance of stereolithography (1.0mm thickness))
The obtained photocurable resin composition was measured using a 3D printer (Form2 LabForm 2) with an outer diameter of 8 mm, an inner diameter of 7 mm (however, a thickness of 1.0 mm), a circumference of 90 °, and a length of 15 mm. Then, it was irradiated with ultraviolet rays having a wavelength of 365 nm under the condition of 5 J / cm ² to be fully cured, thereby obtaining an optically shaped article.

Whether or not the resulting modeled object (hereinafter referred to as “artificial nail 2”) was cracked after being placed under a metal cube having a height of 50 mm, a width of 50 mm, and a height of 50 mm, and a load of 20 kg was applied from the top. It was confirmed visually. A total of 5 artificial nails 2 were evaluated. “A” indicates that the shape is maintained without breaking 5 pieces, “B” indicates that the shape is maintained without breaking 2 to 4 pieces, and 0 to 1 breaks. The shape retaining the shape was designated as “C”.

(Tensile strength and elongation of stereolithography)
The obtained photocurable resin composition was shaped into a size of 30 mm × 10 mm × thickness 0.5 mm using a 3D printer (Form2 Lab2), and irradiated with ultraviolet rays having a wavelength of 365 nm under the condition of 5 J / cm ^2. Then, by performing main curing, an optically shaped article was obtained.

In accordance with the method described in ISO 527-1 (or JIS K7161), the obtained modeled object (hereinafter referred to as “tensile test piece”) was measured using a tensile test device (manufactured by Intesco) and the distance between chucks. Measurement was performed under the conditions of 20 mm and a tensile speed of 5 mm / min, and the tensile strength (unit: MPa) and the elongation (unit:%) when the tensile test piece broke were obtained.

(Tg (glass transition temperature) of stereolithography)
The tensile test piece was measured at a heating rate of 5 ° C./min with a differential scanning calorimeter (DMS) (DMS6100 dynamic viscoelasticity measuring device manufactured by Hitachi High-Tech Science Co., Ltd.) to obtain Tg (ie, glass transition temperature). .

In Tables 1 to 4, the numbers in the “Composition of photocurable composition” column in each example and each comparative example are expressed in parts by mass.

In Tables 1 to 4, the structure of each (meth) acrylic monomer (X) is as follows.
Here, ABE-300, A-BPE-4, and A-BPE-10 are acrylic monomers manufactured by Shin-Nakamura Chemical Co., Ltd., and BP-4PA is an acrylic monomer manufactured by Kyoeisha Chemical Co., Ltd. BP-2EM is a methacrylic monomer manufactured by Kyoeisha Chemical Co., Ltd.

In Tables 1 to 4, the structure of each (meth) acrylic monomer (D) is as follows.
Here, PO-A, POB-A, M-600A and 4EG-A are acrylic monomers manufactured by Kyoeisha Chemical Co., Ltd., PO is a methacrylic monomer manufactured by Kyoeisha Chemical Co., Ltd., and A-LEN- 10 and APG-200 are made by Shin-Nakamura Chemical Co., Ltd., THFA and AIB are made by Osaka Organic Chemical Co., Ltd., FA511AS is made by Hitachi Chemical Co., Ltd., and CHDMMA is made by Nippon Kasei Co., Ltd. .

In Tables 1 to 4, the structures of the photopolymerization initiators are as follows.
Here, Irg819 is “Irgacure819” (acylphosphine oxide compound) manufactured by BASF, Irg184 is “Irgacure184” (alkylphenone compound) manufactured by BASF, and TPO is manufactured by BASF. “Irgacure TPO” (acylphosphine oxide compound).

As shown in Tables 1 to 4, in Examples 1 to 30 containing (meth) acrylic monomer (X) and (meth) acrylic monomer (D), it is possible to obtain an optically shaped article particularly excellent in bending resistance. did it. Further, the bending strength, bending elastic modulus, bending resistance, tensile strength and elongation were good in a good balance.
The viscosity and glass transition temperature (that is, Tg) of the photocurable compositions of Examples 1 to 30 were in a range suitable for stereolithography.
From the above, it was confirmed that the photocurable compositions of Examples 1 to 30 were particularly suitable for production of artificial nails by optical modeling.

The disclosures of Japanese Patent Applications 2017-0666067 and 2017-084814 are incorporated herein by reference in their entirety. All documents, patent applications, and technical standards mentioned in this specification are to the same extent as if each individual document, patent application, and technical standard were specifically and individually described to be incorporated by reference, Incorporated herein by reference. The foregoing descriptions of exemplary embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations will be apparent to practitioners skilled in this art. The embodiments described above best illustrate the principles and practical applications of the invention, so that others skilled in the art can understand the invention along with various embodiments and various modifications suitable for the particular application envisaged. Selected and described. It is intended that the scope of the invention be defined by the following claims and their equivalents.

Claims

A photocurable composition used for stereolithography,
It is at least one selected from di (meth) acrylic monomers having two aromatic rings and two (meth) acryloyloxy groups without having a hydroxyl group and a carboxy group in one molecule, and a weight average molecular weight of 400 or more It is at least one selected from (meth) acrylic monomer (X) which is 800 or less, (meth) acrylic monomer having at least one ring structure and one (meth) acryloyloxy group in one molecule A photocurable composition containing a (meth) acrylic monomer (D) having a weight average molecular weight of 130 or more and 350 or less, and a photopolymerization initiator.
The photocurable composition according to claim 1, wherein at least one of the di (meth) acrylic monomers constituting the (meth) acrylic monomer (X) has an ether bond in one molecule.
The at least 1 sort (s) of the di (meth) acryl monomer which comprises the said (meth) acryl monomer (X) has 1 or more and 10 or less ether bonds in 1 molecule. Photocurable composition.
4. The compound according to claim 1, wherein at least one of the di (meth) acrylic monomers constituting the (meth) acrylic monomer (X) is a compound represented by the following general formula (x-1): The photocurable composition of Claim 1.

[In general formula (x-1), R 1x , R 2x , R 11x , and R 12x each independently represent a hydrogen atom or a methyl group. R 3x and R 4x each independently represents a linear or branched alkylene group having 2 to 4 carbon atoms. mx and nx each independently represents 0 to 10. However, 1 ≦ (mx + nx) ≦ 10 is satisfied. ]
5. The compound according to claim 1, wherein at least one of the di (meth) acrylic monomers constituting the acrylic monomer (X) is a compound represented by the following general formula (x-2). The photocurable composition as described in 2. above.

[In general formula (x-2), R 5x , R 6x , R 7x , R 8x , R 11x , and R 12x each independently represent a hydrogen atom or a methyl group. mx and nx each independently represents 0 to 10. However, 1 ≦ (mx + nx) ≦ 10 is satisfied. ]
6. The compound according to claim 1, wherein at least one of (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is a compound represented by the following general formula (d-1): The photocurable composition of Claim 1.

[In general formula (d-1), R 1d represents a hydrogen atom or a methyl group. R 2d represents a single bond or a linear or branched alkylene group having 1 to 5 carbon atoms. R 3d represents a single bond, an ether bond (—O—), an ester bond (—O— (C═O) —), or —C 6 H 4 —O—. A 1d represents an aromatic ring which may have a substituent. nd represents 1 to 2. ]
The photocurable composition according to claim 6, wherein at least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is a compound represented by the following general formula (d-2). object.

[In general formula (d-2), R 1d , R 4d and R 5d each independently represents a hydrogen atom or a methyl group. A 2d represents an aromatic ring which may have a substituent. nd represents 1 to 2. ]
6. The compound according to claim 1, wherein at least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is a compound represented by the following general formula (d-3). The photocurable composition of Claim 1.

[In general formula (d-3), R 6d represents a hydrogen atom or a methyl group, and R 7d represents a single bond or a methylene group. A 3d represents a ring structure other than an aromatic ring. ]
9. The ring structure other than the aromatic ring is a ring structure having a dicyclopentenyl skeleton, a dicyclopentanyl skeleton, a cyclohexane skeleton, a tetrahydrofuran skeleton, a morpholine skeleton, an isobornyl skeleton, a norbornyl skeleton, a dioxolane skeleton, or a dioxane skeleton. The photocurable composition as described.
At least one of the (meth) acrylic monomers constituting the (meth) acrylic monomer (D) is at least one ring structure, one hydroxyl group, and one (meth) acryloyl per molecule. 6. The photocurable composition according to claim 1, which is a (meth) acrylic monomer having an oxy group.
The photocurable composition according to any one of claims 1 to 6, wherein the (meth) acrylic monomer (D) is o-phenylphenol EO-modified acrylate.
The photocurable composition according to any one of claims 1 to 6, wherein the (meth) acrylic monomer (D) is 3-phenoxybenzyl acrylate.
The photocuring according to any one of claims 1 to 12, wherein the content of the acrylic monomer (X) is 200 parts by mass or more with respect to 1000 parts by mass of the total content of (meth) acrylic monomer components. Sex composition.
The content of the acrylic monomer (D) is 30 parts by mass to 800 parts by mass with respect to 1000 parts by mass of the total content of the (meth) acrylic monomer components. The photocurable composition as described.
The photocurable composition according to any one of claims 1 to 14, wherein the photopolymerization initiator is at least one selected from alkylphenone compounds and acylphosphine oxide compounds.
The content of the photopolymerization initiator is 1 part by mass to 50 parts by mass with respect to a total content of 1000 parts by mass of the (meth) acryl monomer component, according to any one of claims 1 to 15. Photocurable composition.
The photocurable composition according to any one of claims 1 to 16, wherein the viscosity at 25 ° C and 50 rpm measured with an E-type viscometer is 20 mPa · s to 3000 mPa · s.
The photocurable composition according to any one of claims 1 to 17, which is used for producing an artificial nail by stereolithography.
An artificial nail that is a cured product of the photocurable composition according to claim 18.
A reception step for receiving shape information capable of specifying the three-dimensional outer shape of the artificial nail to be formed;
After the optical modeling is performed by the three-dimensional modeling apparatus on the basis of the three-dimensional modeling data and the predetermined modeling information, the contraction state generated in the model that is photocured by the curing apparatus under the predetermined curing condition is set to predetermined prediction information. A prediction step to predict based on,
The three-dimensional shape data of the artificial nail to be formed obtained from the shape information is corrected based on the prediction result of the prediction step, and the three-dimensional modeling device is used to optically model the artificial nail to be formed. A generation step for generating three-dimensional modeling data;
An output step of outputting the modeling data generated by the generating step;
Method of generating modeling data including
21. The prediction information includes the three-dimensional modeling apparatus, modeling information indicating modeling conditions including an optical modeling material used for optical modeling in the three-dimensional modeling apparatus, and curing information indicating the curing conditions. Generation method of modeling data.
In the prediction information, the shape data of the artificial nail manufactured in advance, the modeling data generated from the shape data, and the external shape after curing of the modeled and photocured based on the modeling data The method for generating modeling data according to claim 20 or 21, wherein three-dimensional post-curing data indicating:
An acquisition step of acquiring three-dimensional post-curing data indicating an external shape after curing of a modeled object that is optically modeled and photocured based on the modeling data;
Generated based on the post-curing data acquired in the acquiring step, shape data of the artificial nail to be formed with respect to the post-curing data, a prediction result predicted in the prediction step for the shape data, and the prediction result An update step of updating the prediction information based on the modeling data that has been made,
The method for generating modeling data according to any one of claims 20 to 22, including:
21. A synthesis step of synthesizing the modeling data of the plurality of artificial nails to be formed so that the plurality of artificial nails to be formed are arranged on a substrate and integrally formed by the three-dimensional modeling apparatus. The method for generating modeling data according to claim 23.
25. The method of generating modeling data according to claim 24, wherein the synthesizing step includes providing identification information for identifying each of the plurality of artificial nails to be formed with identification information formed on the substrate.
The said synthesis | combination step synthesize | combines the said modeling data so that the said several board | substrate with which the said several said artificial nail | claw to form each was arranged may be optically modeled in parallel by the said three-dimensional modeling apparatus. Item 25
Method for generating modeling data described in 1.
A reception step for receiving shape information capable of specifying the three-dimensional outer shape of the artificial nail to be formed;
After the optical modeling is performed by the three-dimensional modeling apparatus on the basis of the three-dimensional modeling data and the predetermined modeling information, the contraction state generated in the model that is photocured by the curing apparatus under the predetermined curing condition is set to predetermined prediction information. A prediction step to predict based on,
The three-dimensional shape data of the artificial nail to be formed obtained from the shape information is corrected based on the prediction result of the prediction step, and the three-dimensional modeling device is used to optically model the artificial nail to be formed. A generation step for generating three-dimensional modeling data;
Based on the modeling data generated by the generating step, a modeling step of generating a modeled object by the three-dimensional modeling apparatus;
A curing step for further photocuring the modeled object modeled by the modeling step;
A method of manufacturing an artificial nail including
An acquisition step of acquiring three-dimensional post-curing data indicating the external shape of the modeled object from the modeled product after curing photocured by the curing step;
By comparing the post-curing data and the shape data of the artificial nail to be formed, an evaluation step for evaluating the molded object after the curing,
The manufacturing method of the artificial nail | claw of Claim 27 containing this.
The method for manufacturing an artificial nail according to claim 28, further comprising an update step of updating the prediction information based on an evaluation result of the evaluation step.
Prior to the curing step, any one of claims 27 to 29, including a cleaning step of removing an excess optical modeling material used for optical modeling of the modeled object from a modeled object modeled by the modeling step. The method for producing an artificial nail according to Item.
A three-dimensional modeling apparatus that optically models a three-dimensional model based on the input three-dimensional modeling data;
A curing device for photocuring the modeled object that is optically modeled by the three-dimensional modeling apparatus;
A receiving unit that accepts shape information that can specify the three-dimensional outer shape of the artificial nail to be formed, three-dimensional modeling data, and optical modeling by the three-dimensional modeling apparatus based on predetermined modeling information, and predetermined curing conditions A prediction unit for predicting a contraction state generated in a molded article photocured by the curing device based on prediction information stored in advance, the three-dimensional shape of the artificial nail to be formed obtained from the shape information The generation unit that corrects data based on the prediction result of the prediction unit, and generates three-dimensional modeling data for optical modeling of the artificial nail model to be formed by the three-dimensional modeling apparatus, and the modeling data A modeling design apparatus including an output unit that outputs to the three-dimensional modeling apparatus;
Artificial nail manufacturing system having
32. The prediction information includes the three-dimensional modeling apparatus, modeling information indicating modeling conditions including an optical modeling material used for modeling in the three-dimensional modeling apparatus, and curing information indicating the curing conditions. Artificial nail manufacturing system.
In the prediction information stored in the modeling design apparatus, the shape data of the artificial nail manufactured in advance, the modeling data generated from the shape data, and the optical modeling and photocuring based on the modeling data The artificial nail manufacturing system according to claim 31 or 32, wherein three-dimensional post-curing data indicating an outer shape of the modeled object after curing is included.
The modeling design apparatus
An acquisition unit that acquires three-dimensional post-curing data indicating the outer shape of the modeled object that has been optically modeled and photocured based on the modeling data;
Generated based on the post-curing data acquired in the acquisition unit, shape data of the artificial nail to be formed with respect to the post-curing data, a prediction result predicted by the prediction unit for the shape data, and the prediction result An update unit that updates the prediction information based on the modeling data that has been created;
34. The artificial nail manufacturing system according to any one of claims 31 to 33, including:
The modeling design apparatus
The composite part which synthesize | combines the said modeling data of several said artificial nail to form so that several said artificial nail to form may be arranged on a board | substrate, and may be integrally formed with the said three-dimensional modeling apparatus. 35. The artificial nail manufacturing system according to any one of claims 34 to 34.
36. The artificial nail according to claim 35, wherein the synthesizing unit of the modeling design apparatus includes providing identification information for identifying each of the plurality of artificial nails to be formed with identification information formed on the substrate. Manufacturing system.
The synthesis unit of the modeling design apparatus synthesizes the modeling data so that a plurality of the substrates each having the plurality of artificial nails to be formed are modeled in parallel by the three-dimensional modeling apparatus. Item 37. The artificial nail manufacturing system according to Item 35 or 36.
An acquisition unit that acquires three-dimensional post-curing data indicating the external shape of the modeled object from the modeled model that has been photocured by the curing device, and the data after curing and the shape data of the artificial nail to be formed The artificial nail manufacturing system according to any one of claims 31 to 37, including an evaluation device including an evaluation unit that evaluates the cured object after the comparison.
39. The artificial nail manufacturing system according to claim 38, wherein the modeling design device includes an update unit that updates the prediction information based on an evaluation result of the evaluation unit of the evaluation device.