JP2010214754A - Apparatus for preparing plastic raw material liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for preparing a plastic raw material liquid which enables reducing production costs of optical articles and manufacturing optical articles having good quality. <P>SOLUTION: The preparing apparatus includes raw material containers 11 and 12 containing two raw materials L1 and L2, respectively, a mixing section 13 mixing the raw materials L1 and L2 delivered from the raw material containers 11 and 12, respectively, to prepare a plastic raw material liquid, and a detection section 14 detecting the mixing ratio of the raw materials L1 and L2 prepared in the mixing section 13. When the mixing ratio is in tolerance, plastic lenses for spectacles having good quality can be manufactured. When the mixing ratio is outside tolerance, the operation of pouring the plastic raw material liquid L into a molding mold 21 is stopped to proceed to unnecessary operations of the polymerization process and subsequent processes, resulting in a reduction of production costs. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a plastic raw material liquid preparation device for preparing a plastic raw material liquid by preparing different raw materials.

In order to manufacture a plastic lens for spectacles, there is a lens molding method in which a pair of molds are arranged opposite to each other, a tape is applied to the peripheral surfaces of these molds, and a plastic raw material liquid is injected from a nozzle penetrating the tape. Are known.
The plastic raw material liquid used in this lens molding method is prepared by mixing a plurality of types of raw materials. As a conventional example of manufacturing plastic lenses for eyeglasses from plastic raw material liquid, polyisocyanate and polyol are degassed separately, and polyisocyanate and polyol are continuously mixed at a predetermined ratio, and this mixed plastic raw material liquid is molded. There is a method of injecting into the mold (Patent Document 1).

  As another conventional example, a polyisocyanate compound and a polythiol compound are mixed at a predetermined ratio, the mixed plastic raw material liquid is poured into a plurality of lens molds, and these lens molds are put in the same polymerization furnace to form a plurality. The eyeglass plastic lens is polymerized, and from among the plurality of eyeglass plastic lenses, an arbitrary number of eyeglass plastic lenses are taken out and dyed in a water bath, and polymerized according to the dyeing density of the arbitrary number of lenses. There is a method (Patent Document 2) for determining whether or not all of the obtained plural plastic lenses for spectacles have desired physical properties.

Japanese Patent Laid-Open No. 5-212732 JP 2006-65036 A

In the operation of mixing a plurality of different raw materials into a plastic raw material liquid, there are cases where raw material measurement errors and other human error occur. If the mixing ratio of these raw materials is out of the specified range, the basic physical properties of the plastic lens for spectacles are deteriorated and the original lens performance cannot be obtained.
In the conventional example shown in Patent Document 1, a plastic raw material liquid in which a polyisocyanate compound and a polythiol compound, which are raw materials, are mixed in a predetermined ratio is injected into a molding die to obtain a plastic lens for spectacles. No verification method has been presented for verifying whether the mixing ratio of the compound and the polythiol compound is within the correct range.

In this regard, the conventional example shown in Patent Document 2 presents a method for verifying whether or not the mixing ratio is in the correct range. That is, Patent Document 2 pays attention to the fact that the dye density is different between the lens when the composition containing the polyisocyanate compound and the polythiol compound is within the preferable composition range and the lens when the composition deviates from the preferable composition range. Adopting a configuration in which a plurality of plastic lenses for spectacles obtained by polymerization are dyed in a water bath, and whether or not the plastic lens for spectacles has a desired physical property is determined by the dyeing density of these lenses With this configuration, there is an effect that defective products can be found before shipment.
However, in Patent Document 2, in order to find a defective product, a plastic raw material liquid is injected into a plurality of lens molds, and these lens molds are placed in the same polymerization furnace to superimpose plastic lenses for eyeglasses to produce lenses. It is necessary to carry out up to the process. If a defective product is found after the lens is manufactured, a useless manufacturing process called lens polymerization is also performed, resulting in a high manufacturing cost.

  An object of the present invention is to provide a plastic raw material liquid blending apparatus capable of reducing the manufacturing cost of an optical article and producing an optical article with good quality.

  The plastic raw material liquid preparation apparatus of the present invention is an apparatus for preparing a plastic raw material liquid by injecting a plastic raw material liquid into a mold and mixing a plurality of different raw materials in order to produce an optical article. A raw material storage container for storing the raw materials, a mixing unit for mixing the raw materials respectively transferred from the raw material storage containers to prepare the plastic raw material liquid, and a mixing ratio of the raw materials prepared in the mixing unit. And a detector for detecting.

In the invention of this configuration, a plurality of raw materials are respectively stored in raw material storage containers in advance, each raw material is transferred from these raw material storage containers to a mixing unit, and a plurality of raw materials are mixed in this mixing unit to obtain a plastic raw material. Prepare the liquid. In the plastic raw material liquid prepared by the mixing unit, the mixing ratio of the raw materials is detected by the detection unit. If the mixing ratio of the raw materials is detected within the allowable range as a result of detection by the detection unit, the plastic raw material liquid is injected into a mold to produce an optical article. In some cases, the injection of the plastic raw material liquid into the mold is stopped, and the mixing ratio of the raw materials is adjusted as necessary.
In the present invention, the raw materials respectively transferred from the raw material storage container are mixed in the mixing unit to prepare the plastic raw material liquid, and the mixing ratio of the raw materials of the plastic raw material liquid prepared in the mixing unit is detected by the detection unit. If the mixing ratio is within the allowable range, an optical article with good quality can be manufactured. If the mixing ratio is out of the allowable range, the operation of injecting the plastic raw material liquid into the mold can be stopped. Therefore, it is not necessary to carry out the work after the polymerization step, and the production cost can be reduced.

Here, in this invention, the said mixing part has a preferable structure which mixes the said raw material continuously.
In the invention of this configuration, since the mixing ratio of the plastic raw material liquid tends to be constant by continuously mixing the raw materials, detection by the detection unit that is performed thereafter can be performed accurately. In addition, since mixing and detection can be performed in-line, the manufacturing efficiency can be improved and the manufacturing cost can be reduced from this point.

The detection unit is preferably configured to detect the absorbance or transmittance of the plastic raw material liquid.
The invention of this configuration focuses on the fact that the absorbance or transmittance varies depending on the type of raw material. The wavelength of the light used can be any of ultraviolet, visible, and infrared, and it is desirable to select a wavelength that is most easily detected for the mixing ratio depending on the raw material used. At this time, a part of the line is made of a translucent member, light is irradiated to the plastic raw material liquid flowing inside the translucent member, and light transmitted through the plastic raw material liquid is detected among the irradiated light. Thus, the absorbance or transmittance is detected.
Therefore, in the present invention, it is possible to prevent the material adhering to the detection instrument from being erroneously mixed into the plastic raw material liquid due to the detection instrument coming into contact with the plastic raw material liquid for detection. The quality of the product can be maintained. In addition, the mixing ratio of the raw material liquid flowing in the line can be continuously confirmed, and when the mixing ratio is deviated, it can be immediately detected.

The detection unit is preferably configured to detect a refractive index of the plastic raw material liquid.
The invention of this configuration focuses on the fact that the refractive index varies depending on the type of raw material. The mixing ratio is detected.
Therefore, in the present invention, since the mixing ratio of the raw materials can be detected with a relatively available instrument such as a refractometer or a differential refractometer, the manufacturing cost can be reduced. Further, it is possible to continuously check the mixing ratio of the raw materials flowing in the line, and it is possible to immediately detect when the mixing ratio deviates.

A configuration in which a dye is added to some of the plurality of raw materials is preferable.
In the invention of this configuration, by adding a dye to some of the plurality of raw materials, the difference in absorbance or transmittance between the some raw materials and the other raw materials can be increased, so the mixing ratio of the raw materials Can be accurately detected.

A configuration in which an ultraviolet absorber is added to some of the plurality of raw materials is preferable.
In the invention of this configuration, by adding an ultraviolet absorber to a part of the plurality of raw materials, it is possible to increase the difference in absorbance or transmittance between the partial raw materials and other raw materials, particularly in the ultraviolet region. Therefore, the mixing ratio of raw materials can be accurately detected.

A configuration in which a part of the plurality of raw materials is a composition containing a polyiso (thio) cyanate compound and at least another part is a composition containing a polythiol compound is preferable.
In the invention of this configuration, a good quality optical article can be produced from a plastic raw material liquid having a composition containing a polyiso (thio) cyanate compound and a composition containing a polythiol compound, and the production cost can be reduced. Can do.

A configuration in which a part of the plurality of raw materials is a composition containing an episulfide compound and at least another part is a composition containing a polythiol compound is preferable.
In the invention of this configuration, it is possible to produce an optical article with good quality from a plastic raw material liquid having a composition containing an episulfide compound and a composition containing a polythiol compound, and it is possible to reduce the production cost.

The schematic block diagram of the manufacturing apparatus containing the compounding apparatus of the plastic raw material liquid concerning one Embodiment of this invention. (A) (B) is a schematic block diagram which shows an example of a mixing part, respectively. (A)-(C) is a schematic block diagram which shows an example of a detection part, respectively.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic configuration of a manufacturing apparatus including a plastic raw material liquid preparation apparatus according to the present embodiment.
In FIG. 1, a manufacturing apparatus prepares a plastic raw material liquid L by preparing two different raw materials L1 and L2, and an optical article by injecting the plastic raw material liquid L prepared by the mixing apparatus 1. And a molding apparatus 2 for producing a plastic lens for spectacles.

The blending device 1 mixes a raw material storage container 11 for storing the raw material L1, a raw material storage container 12 for storing the raw material L2, and the raw materials L1 and L2 respectively transferred from these raw material storage containers 11 and 12, and a plastic raw material liquid A mixing unit 13 that mixes L and a detection unit 14 that detects a mixing ratio of the raw materials L1 and L2 mixed and mixed in the mixing unit 13 are provided.
The line 11L that connects the raw material storage container 11 and the mixing unit 13 is provided with a pump 151 that transfers the raw material L1 from the raw material storage container 11 to the mixing unit 13, and the line 12L that connects the raw material storage container 12 and the mixing unit 13 Is provided with a pump 152 for transferring the raw material L2 from the raw material storage container 12 to the mixing unit 13.

The molding apparatus 2 includes a molding die 21 for injecting a plastic raw material liquid, and a pump 22 for transferring the plastic raw material liquid from the detection unit 14 to the molding die 21.
The molding die 21 includes a pair of planar substantially disk-shaped glass molds 211 and 212 and a tape 213 attached to the outer peripheral edges of these glass molds 211 and 212. The tape 213 has the nozzle 214 penetrated at the tip, and the nozzle 214 discharges the plastic raw material liquid transferred by the pump 22 into the mold 21.
The pump 22 and the pumps 151 and 152 of the blending apparatus 1 are connected to the control device 3, and the control device 3 receives signals from the detection unit 14 and controls driving of the pumps 22, 151 and 152. .

  When the mixing ratio of the raw materials L1 and L2 detected by the detection unit 14 is within an allowable range, the control device 3 drives and controls the pump 22 so as to inject the plastic raw material liquid L into the mold 21. The pumps 151 and 152 are driven and controlled so as to send the raw materials L1 and L2 to the mixing unit 13, and the plastic raw material liquid L is not injected into the mold 21 when the mixing ratio is outside the allowable range. In addition, the drive of the pump 22 is stopped and the drive of the pumps 151 and 152 is stopped so that the raw materials L1 and L2 are not sent to the mixing unit 13.

  When the mixing ratio is outside the allowable range, the control device 3 may display an alarm as necessary. As this alarm, a warning sound or a display (not shown), for example, a display indicating abnormality is displayed on a personal computer. Further, when the mixing ratio is outside the allowable range, the control device 3 does not stop the driving of the pumps 151 and 152 so that the raw materials L1 and L2 are not sent to the mixing unit 13, but the mixing ratio is within the allowable range. It may be controlled to change the driving state (discharge amount) of the pumps 151 and 152 so that For example, if the detection unit 14 detects that the raw material L1 is greater than the raw material L2, the driving of the pump 151 is controlled so as to reduce the discharge amount of the raw material L1 to the mixing unit 13, and the raw material L2 is supplied to the mixing unit 13 The drive of the pump 152 is controlled so as to increase the discharge amount.

Various structures can be employed for the mixing unit 13. For example, the structure shown in FIGS. 2A and 2B can be employed.
FIG. 2A shows an example in which the mixing unit 13 is composed of a static mixer.
2A, the mixing unit 13 includes a collecting pipe 131 and a mixer pipe 132 connected to the collecting pipe 131.
The collecting pipe 131 includes an end 131A connected to the end of the line 11L, an end 131B connected to the end of the line 12L, a raw material L1 transferred from the line 11L, and a raw material L2 transferred from the line 12L. And a merging space 131C for merging the two.
The mixer tube 132 includes a tube portion 132A having one end connected to the collecting tube 131 and the other end connected to the detection unit 14, and a plurality of fins 132B attached to the inside of the tube portion 132A. The plurality of fins 132B have a structure in which a plate is twisted, and the raw material L1 and the raw material L2 sent from the collecting pipe 131 are divided, converted, and inverted to be mixed to prepare the plastic raw material liquid L.

FIG. 2B shows an example in which the mixing unit 13 is composed of a dynamic mixer.
In FIG. 2B, the mixing unit 13 includes a collecting pipe 131 and a mixer pipe 133 connected to the collecting pipe 131.
The mixer tube 133 includes a tube portion 133A having one end connected to the collecting tube 131 and the other end connected to the detection unit 14, a screw portion 133B rotatably attached to the inside of the tube portion 133A, and the screw portion. And a motor 133C that rotationally drives 133B. By rotating the screw part 133B by the motor 133C, the raw material L1 and the raw material L2 sent from the collecting pipe 131 are mixed to prepare the plastic raw material liquid L.

Although various structures can be employed for the detection unit 14, for example, the structures illustrated in FIGS. 3A to 3C can be employed.
FIG. 3A shows an example of a configuration for detecting the absorbance as the detection unit 14.
In FIG. 3A, the detection unit 14 includes a light-transmitting communication pipe 141 having one end connected to the mixer pipe 132 and the other end communicating with the nozzle 214, and a plastic raw material liquid L that circulates inside the communication pipe 141. And an absorbance detector 142 for detecting the absorbance of.
The absorbance detector 142 is a spectrophotometer, and receives the light irradiation unit 142A disposed opposite to the communication tube 141, and the light irradiated by the light irradiation unit 142A and transmitted through the communication tube 141. And a light receiving portion 142B.
Here, when the absorbance of the raw material L1 is X1, the absorbance of the raw material L2 is X2, and the mixing ratio of the raw material L1 and the raw material L2 is 1: α, the absorbance X of the plastic raw material liquid L is X = (X1 + αL2) / ( 1 + α).
Centering on the value of X, a predetermined numerical value is added above and below to set the above-described allowable range.

FIGS. 3B and 3C show an example of a configuration for detecting the refractive index of the plastic raw material liquid L as the detection unit 14.
In FIG. 3B, the detection unit 14 detects the absorbance of the plastic raw material liquid L flowing through the communication pipe 143 having one end connected to the mixer pipe 132 and the other end communicating with the nozzle 214, and the communication pipe 143. A refractometer 144.
The refractometer 144 is exposed to the inside of the tube with the detection portion on the tip side passing through the communication tube 143.
Here, the refractive index Y of the plastic raw material liquid L when the refractive index of the raw material L1 is Y1, the refractive index of the raw material L2 is Y2, and the mixing ratio of the raw material L1 and the raw material L2 is 1: α is Y = (Y1 + αY2 ) / (1 + α).
The above-mentioned allowable range is set by adding a predetermined numerical value above and below the Y value as a center.

In FIG. 3C, the detection unit 14 includes a communication pipe 143 and a differential refractometer 145 that detects the absorbance of the plastic raw material liquid L flowing through the communication pipe 143.
The differential refractometer 145 includes a flow cell 145A that introduces the internal fluid of the communication pipe 143 and the reference fluid, a light source 145B that irradiates the flow cell 145A with measurement light, and light that is emitted from the light source 145B and transmitted through the flow cell 145A. And 145C for reflecting the reflected light to the flow cell 145A, and a light receiving sensor 145D for receiving the reflected light transmitted through the flow cell 145A. A lens 145E and a slit 145F are disposed between the light source 145B and the flow cell 145A. The flow cell 145A is provided with a partition wall 145X for partitioning the internal fluid of the communication pipe 143 and the reference fluid inside the flow cell 145A, and the measurement light reflected from the mirror 145C passes through the partition wall 145X so that the internal fluid of the communication pipe 143 and the reference fluid The light is refracted according to the difference in refractive index and irradiated to the light receiving sensor 145D.

  Various materials can be used for the raw material L1 and the raw material L2. For example, a composition containing a polyiso (thio) cyanate compound can be used as the raw material L1, and a composition containing a polythiol compound can be used as the raw material L2. Alternatively, a composition containing an episulfide compound can be used as the raw material L1, and a composition containing a polythiol compound can be used as the raw material L2. Further, at least one of a dye and an ultraviolet absorber is added to one of the raw materials L1 and L2, for example, the raw material L1. Since the addition amount of the dye and the ultraviolet absorber is very small compared to the addition amount of the raw materials L1 and L2, it does not significantly affect the mixing ratio of the raw materials L1 and L2.

  Here, as specific examples of the polyisocyanate compound, 1,2-diisocyanatobenzene, 1,3-diisocyanatobenzene, 1,4-diisocyanatobenzene, 2,4-diisocyanatotoluene, ethylpheny Diisocyanate, isopropylphenylene diisocyanate, dimethylphenylene diisocyanate, diethylphenylene diisocyanate, diisopropylphenylene diisocyanate, trimethylbenzene triisocyanate, benzene triisocyanate, biphenyl diisocyanate, toluidine diisocyanate, 4,4'-methylenebis (phenylisocyanate), 4, 4'-methylenebis (2-methylphenyl isocyanate), bibenzyl-4,4'-diisocyanate, bis (isocyanatophenyl) Tylene, isophorone diisocyanate, cyclohexane diisocyanate, methylcyclohexane diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), 4,4'-methylenebis (2-methylcyclohexylisocyanate), 3,8-bis (isocyanatomethyl) tricyclodecane 3,9-bis (isocyanatomethyl) tricyclodecane, 4,8-bis (isocyanatomethyl) tricyclodecane, 4,9-bis (isocyanatomethyl) tricyclodecane.

Also, xylylene diisocyanate, tetrachloro-m-xylylene diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated diphenylmethane diisocyanate, tetramethyl xylylene diisocyanate, 2,5-bis (isocyanatomethyl) bicyclo [2.2.1] heptane. 2,6-bis (isocyanatomethyl) bicyclo [2.2.1] heptane, 3,8-bis (isocyanatomethyl) tricyclo [5.2.1,02,6] -decane, 3,9-bis ( Isocyanatomethyl) tricyclo [5.2.1.02,6] -decane, 4,8-bis (isocyanatomethyl) tricyclo [5.2.1,02,6] -decane, 4,9-bis (isocyanatomethyl) ) Tricyclo [5.2.1,02,6] -decane, dimer acid diisocyanate Polyisocyanate compounds such as salts and allophanate-modified products of these compounds, 1,3-bis (α, α-dimethylisocyanatomethyl) benzene, 1,4-bis (α, α-dimethylisocyanatomethyl) benzene, hexamethylene Diisocyanate, isophorone diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, polymeric diphenylmethane diisocyanate, tolidine diisocyanate, naphthalene diisocyanate, 4,4'-diphenylmethane diisocyanate, biuretation reaction product of hexamethylene diisocyanate, adduct formation of hexamethylene diisocyanate and trimethylolpropane Products, 4,4'-dicyclohexylmethane diisocyanate, modified isocyanurate, etc. That.
In addition, although illustrated with isocyanate, isothiocyanate may be sufficient.
These polyisocyanate compounds and polyisothiocyanate compounds can be used alone or in admixture of two or more.

  Examples of the polythiol compound include various compounds shown below and those employing one or more of these compounds. For example, the following can be mentioned. 1,1,3,3-tetrakis (mercaptomethylthio) propane, 1,1,2,2-tetrakis (mercaptomethylthio) ethane, 1,2,5-trimercapto-4-thiapentane, 3,3-dimercaptomethyl -1,5-dimercapto-2,4-dithiapentane, 3-mercaptomethyl-1,5-dimercapto-2,4-dithiapentane, 3-mercaptomethylthio-1,7-dimercapto-2,6-dithiaheptane, 3,6 Dimercaptomethyl-1,9-dimercapto-2,5,8-trithianonane, 3,7-dimercaptomethyl-1,9-dimercapto-2,5,8-trithianonane, 4,6-dimercaptomethyl-1 , 9-dimercapto-2,5,8-trithianonane, 3-mercaptomethyl-1,6-dimercapto-2,5-di Ahexane, 3-mercaptomethylthio-1,5-dimercapto-2-thiapentane, 1,1,2,2-tetrakis (mercaptomethylthio) ethane, 1,4,8,11-tetramercapto-2,6,10-tri Thiaundecane, 1,4,9,12-tetramercapto-2,6,7,11-tetrathiaddecane, 2,3-dithia-1,4-butanedithiol, 2,3,5,6-tetrathia-1 , 7-heptanedithiol, 2,3,5,6,8,9-hexathia-1,10-decanedithiol, 4,5-bis (mercaptomethylthio) -1,3-dithiolane, 4,6-bis (mercapto) Methylthio) -1,3-dithiane, 2-bis (mercaptomethylthio) methyl-1,3-dithietane, 2- (2,2-bis (mercaptomethylthio) ethyl 1,3-dithietane, and the like.

  Also, 3-mercapto-1,2-propanediol, glycerin di (mercaptoacetate), 1-hydroxy-4-mercaptocyclohexane, 2,4-dimercaptophenol, 2-mercaptohydroquinone, 4-mercaptophenol, 3,4 Dimercapto-2-propanol, 1,3-dimercapto-2-propanol, 2,3-dimercapto-1-propanol, 1,2-dimercapto-1,3-butanediol, pentaerythritol tris (3-mercaptopropionate ), Pentaerythritol mono (3-mercaptopropionate), pentaerythritol bis (3-mercaptopropionate), pentaerythritol tris (thioglycolate), dipentaerythritol pentakis (3-mercaptopropio) Over G), hydroxymethyl - tris (mercaptoethylthiomethyl) methane, 1-hydroxyethylthio-3-mercaptoethylthio benzene.

  Furthermore, as a compound having two or more mercapto groups in the structure, methanedithiol, 1,2-ethanedithiol, 1,1-propanedithiol, 1,2-propanedithiol, 1,3-propanedithiol, 2,2 -Propanedithiol, 1,6-hexanedithiol, 1,2,3-propanetrithiol, 1,1-cyclohexanedithiol, 1,2-cyclohexanedithiol, 2,2-dimethylpropane-1,3-dithiol, 3, 4-dimethoxybutane-1,2-dithiol, 2-methylcyclohexane-2,3-dithiol, 1,1-bis (mercaptomethyl) cyclohexane, bis (2-mercaptoethyl ester) thiomalate, 2,3-dimercapto- 1-propanol (2-mercaptoacetate), 2,3-dimerca To-1-propanol (3-mercaptopropionate), diethylene glycol bis (2-mercaptoacetate), diethylene glycol bis (3-mercaptopropionate), 1,2-dimercaptopropyl methyl ether, 2,3-dimercapto Propyl methyl ether, 2,2-bis (mercaptomethyl) -1,3-propanedithiol, bis (2-mercaptoethyl) ether, ethylene glycol bis (2-mercaptoacetate), ethylene glycol bis (3-mercaptopropionate) ), Trimethylolpropane bis (2-mercaptoacetate), trimethylolpropane bis (3-mercaptopropionate), pentaerythritol tetrakis (2-mercaptoacetate), pentaerythritol tetra (3-mercaptopropionate), aliphatic polythiol compounds such as tetrakis (mercaptomethyl) methane, 1,2-dimercaptobenzene, 1,3-dimercaptobenzene, 1,4-dimercaptobenzene, 1,2 -Bis (mercaptomethyl) benzene, 1,3-bis (mercaptomethyl) benzene, 1,4-bis (mercaptomethyl) benzene, 1,2-bis (mercaptoethyl) benzene, 1,3-bis (mercaptoethyl) Benzene, 1,4-bis (mercaptoethyl) benzene, 1,2,3-trimercaptobenzene, 1,2,4-trimercaptobenzene, 1,3,5-trimercaptobenzene, 1,2,3-tris (Mercaptomethyl) benzene, 1,2,4-tris (mercaptomethyl) benzene, 1,3,5-tris (Mercaptomethyl) benzene, 1,2,3-tris (mercaptoethyl) benzene, 1,2,4-tris (mercaptoethyl) benzene, 1,3,5-tris (mercaptoethyl) benzene, 2,5-toluene Dithiol, 3,4-toluenedithiol, 1,3-di (p-methoxyphenyl) propane-2,2-dithiol, 1,3-diphenylpropane-2,2-dithiol, phenylmethane-1,1-dithiol, Aromatic polythiols such as 2,4-di (p-mercaptophenyl) pentane, 1,2-bis (mercaptoethylthio) benzene, 1,3-bis (mercaptoethylthio) benzene, 1,4-bis (mercaptoethyl) Thio) benzene, 1,2,3-tris (mercaptomethylthio) benzene, 1,2,4-tris (mercapto) Tilthio) benzene, 1,3,5-tris (mercaptomethylthio) benzene, 1,2,3-tris (mercaptoethylthio) benzene, 1,2,4-tris (mercaptoethylthio) benzene, 1,3,5 -Aromatic polythiol compounds containing sulfur atoms in addition to mercapto groups such as tris (mercaptoethylthio) benzene, etc., and their nuclear alkylated products, bis (mercaptomethyl) sulfide, bis (mercaptomethyl) disulfide, bis (mercaptoethyl) ) Sulfide, bis (mercaptoethyl) disulfide, bis (mercaptopropyl) sulfide, bis (mercaptomethylthio) methane, bis (2-mercaptoethylthio) methane, bis (3-mercaptopropylthio) methane, 1,2-bis ( Mercaptomethylthio) Tan, 1,2-bis (2-mercaptoethylthio) ethane, 1,2-bis (3-mercaptopropyl) ethane, 1,3-bis (mercaptomethylthio) propane, 1,3-bis (2-mercaptoethyl) Thio) propane, 1,3-bis (3-mercaptopropylthio) propane, 1,2,3-tris (mercaptomethylthio) propane, 1,2,3-tris (2-mercaptoethylthio) propane, 1,2 , 3-tris (3-mercaptopropylthio) propane, 1,2-bis [(2-mercaptoethyl) thio] -3-mercaptopropane, 4-mercaptomethyl-3,6-dithia-1,8-octanedithiol 4,8-dimercaptomethyl-1,11-mercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,1 1-mercapto-3,6,9-trithiaundecane, 5,7-dimercaptomethyl-1,11-mercapto-3,6,9-trithiaundecane, tetrakis (mercaptomethylthiomethyl) methane, tetrakis (2- Mercaptoethylthiomethyl) methane, tetrakis (3-mercaptopropylthiomethyl) methane, bis (2,3-dimercaptopropyl) sulfide, bis (1,3-dimercaptopropyl) sulfide, 2,5-dimercapto-1, 4-dithiane, 2,5-dimercaptomethyl-1,4-dithiane, 2,5-dimercaptomethyl-2,5-dimethyl-1,4-dithiane, bis (mercaptomethyl) disulfide, bis (mercaptoethyl) Disulfides, bis (mercaptopropyl) disulfides, etc., and their thiols Esters of richolic acid and mercaptopropionic acid, hydroxymethyl sulfide bis (2-mercaptoacetate), hydroxymethyl sulfide bis (3-mercaptopropionate), hydroxyethyl sulfide bis (2-mercaptoacetate), hydroxyethyl sulfide bis (3 -Mercaptopropionate), hydroxypropyl sulfide bis (2-mercaptoacetate), hydroxypropyl sulfide bis (3-mercaptopropionate), hydroxymethyl disulfide bis (2-mercaptoacetate), hydroxymethyl disulfide bis (3-mercapto Propionate), hydroxyethyl disulfide bis (2-mercaptoacetate), hydroxyethyl disulfide bis (3-mercapto) Lopionate), hydroxypropyl disulfide bis (2-mercaptoacetate), hydroxypropyl disulfide bis (3-mercaptopropionate), 2-mercaptoethyl ether bis (2-mercaptoacetate), 2-mercaptoethyl ether bis (3-mercapto) Propionate), 1,4-dithian-2,5-diol bis (2-mercaptoacetate), 1,4-dithian-2,5-diol bis (3-mercaptopropionate), bis (thiodiglycolate) (2 -Mercaptoethyl ester), thiodipropionic acid bis (2-mercaptoethyl ester), 4,4-thiodibutyric acid bis (2-mercaptoethyl ester), dithiodiglycolic acid bis (2-mercaptoethyl ester), dithiodipropion acid Bis (2-mercaptoethyl ester), 4,4-dithiodibutyric acid bis (2-mercaptoethyl ester), thiodiglycolic acid bis (2,3-dimercaptopropyl ester), thiodipropionic acid bis (2,3 -Dimercaptopropyl ester), dithioglycolic acid bis (2,3-dimercaptopropyl ester), dithiodipropionic acid bis (2,3-dimercaptopropyl ester) and other aliphatic compounds containing sulfur atoms in addition to mercapto groups Examples include polythiol compounds.

  Episulfide compounds include bis (β-epithiopropyl) sulfide, bis (β-epithiopropyl) disulfide, bis (β-epithiopropyl) trisulfide, bis (β-epithiopropylthio) methane, 1,2 -Bis (β-epithiopropylthio) ethane, 1,3-bis (β-epithiopropylthio) propane, 1,2-bis (β-epithiopropylthio) propane, 1,4-bis (β- And episulfides such as epithiopropylthio) butane and bis (β-epithiopropylthioethyl) sulfide.

  As a dye, a dye for bluing can be exemplified. This blueing dye is a blue or purple dye that counteracts the yellowness when added to the plastic lens material itself for spectacles and maintains the transparency of the plastic lens for spectacles. Although there is no restriction | limiting in particular as a dye for bluing, An oil-soluble dye, especially an anthraquinone violet oil-soluble dye or an anthraquinone blue oil-soluble dye are preferable. Specific examples of these oil-soluble dyes include C.I. I. Solvent Violet 13, C.I. I. Solvent Violet 14, C.I. I. Solvent Blue 11, C.I. I. Solvent Blue 12 etc. are mentioned.

  A benzotriazole type ultraviolet absorber can be illustrated as an ultraviolet absorber. Examples of the benzotriazole ultraviolet absorber include 2- (2-hydroxy-5-methylphenyl) -2H-benzotriazole, 2- (2-hydroxy-5-tert-butylphenyl) benzotriazole, 2- (2- Hydroxy-3,5-di-tert-butylphenyl) benzotriazole, 2- (2-hydroxy-3,5-di-tert-amylphenyl) benzotriazole, 5-chloro-2- (3,5-di-) tert-butyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -5-chloro-2H-benzotriazole, 2- (3,5- Di-tert-pentyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (3,5-di-te t-butyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (2H-benzotriazol-2-yl) -4-methyl- (3,4,5,6-tetrahydrophthalimidylmethyl) phenol, 2 -(2-hydroxy-5-tert-octylphenyl) -2H-benzotriazole, 1.6-bis (4-benzoyl-3-hydroxyphenoxy) -hexane, 1,4-bis (4-benzoyl-4-octyl) Phenyl) -2H-benzotriazole, 2- (2-hydroxy-4-octyloxyphenyl) -2H-benzotriazole and the like can be exemplified.

Next, a method for manufacturing a plastic lens for spectacles using the manufacturing apparatus of this embodiment will be described.
First, the raw materials L1 and L2 of the plastic lens for spectacles are selected, and the mixing ratio is selected. An allowable range corresponding to this mixture ratio is set in the control device 3. Further, the raw material L1 is stored in the raw material storage container 11, and the raw material L2 is stored in the raw material storage container 12. Note that at least one of a dye and an ultraviolet absorber is stored in the raw material storage container 11.
In this state, the pumps 151, 152, and 22 are operated by the control device 3. Then, the raw materials L1 and L2 stored in the raw material storage containers 11 and 12 are transferred to the mixing unit 13 and mixed in the mixing unit 13 to prepare the plastic raw material liquid L. In the mixing unit 13, the raw material L1 and the raw material L2 gather in the collecting pipe 131 and are sufficiently mixed by a static mixer or a dynamic mixer to prepare the plastic raw material liquid L.
The plastic raw material liquid L is sent to the molding apparatus 2 through the detection unit 14. In the molding apparatus 2, the plastic raw material liquid is injected into the internal space of the molding die 21 by the pump 22.

Here, the signal of the mixing ratio detected by the detection unit 14 is sent to the control device 3. In the control device 3, when the signal of the mixing ratio sent from the detection unit 14 is within the allowable range, the pumps 151, 152, and 22 are continuously operated in the same state.
On the other hand, when the control device 3 determines that the mixing ratio is outside the allowable range, the pumps 151 and 152 are configured not to send the raw materials L1 and L2 to the mixing unit 13 or to be within the allowable range. The drive is controlled and the drive of the pump 22 is stopped to stop the injection of the plastic raw material liquid L into the mold 21.

Therefore, in the present embodiment, the following operational effects can be achieved.
(1) Mixing of raw material storage containers 11 and 12 for storing two kinds of raw materials L1 and L2, respectively, and mixing raw materials L1 and L2 respectively transferred from these raw material storage containers 11 and 12 to prepare a plastic raw material liquid Since the mixing device is configured to include the unit 13 and the detection unit 14 that detects the mixing ratio of the raw materials L1 and L2 prepared by the mixing unit 13, if the mixing ratio is within an allowable range, the quality is good. When a plastic lens for spectacles can be manufactured and the mixing ratio is outside the allowable range, the operation after the polymerization step is not performed by stopping the operation of injecting the plastic raw material liquid L into the mold 21. Therefore, the manufacturing cost can be reduced.
(2) Since the mixing unit 13 and the detection unit 14 are arranged on one line, mixing and detection are performed in-line. Also from this point, manufacturing efficiency is improved and manufacturing cost is increased. Can be reduced.

(3) Since the raw materials L1 and L2 are continuously mixed into the mixing unit 13 by the pumps 151 and 152, the mixing ratio of the plastic raw material liquid L is likely to be constant, and the detection accuracy at the detection unit 14 is increased. it can.

(4) If the detection unit 14 is configured to detect the absorbance of the plastic raw material liquid L, the plastic raw material liquid L can be detected in a non-contact manner. Quality degradation can be prevented.
(5) If the detection unit 14 is configured to detect the refractive index of the plastic raw material liquid L, it is possible to employ a relatively available instrument with high measurement accuracy, and thus the manufacturing cost can be reduced. .

(6) Since a dye or an ultraviolet absorber is added to the raw material L1, the difference in transmittance between the raw material L1 and the raw material L2 can be increased, so that the mixing ratio of the raw materials L1 and L2 can be accurately detected. it can.

(7) If the mixing unit 13 is composed of a static mixer, the mixing unit 13 has no moving parts, so that maintenance becomes easy.
(8) If the mixing unit 13 is composed of a dynamic mixer, the raw materials L1 and L2 can be mixed in a shorter time and accurately.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above embodiment, two kinds of raw materials L1 and L2 are mixed to prepare the plastic raw material liquid L. However, in the present invention, three or more kinds of raw materials may be mixed to prepare the plastic raw material liquid L. . Furthermore, the raw material is not limited to that of the above embodiment.
In the present invention, in configuring the detection unit 14, a sub tank may be used instead of the communication pipes 141 and 143.
Furthermore, although the mixing unit 13 and the detection unit 14 are provided in-line, it is not always necessary to have an in-line configuration.

  Furthermore, although the case where the optical article is a plastic lens for spectacles has been described, any specific configuration may be used as long as it is an optical article manufactured using the mold 21. For example, the present invention can be applied to the case of manufacturing a lens for a camera.

  The present invention can be used for manufacturing plastic lenses for eyeglasses, lenses for cameras, and other optical articles.

  DESCRIPTION OF SYMBOLS 1 ... Preparation apparatus, 2 ... Molding apparatus, 3 ... Control apparatus, 11, 12 ... Raw material storage container, 13 ... Mixing part, 14 ... Detection part, L1, L2 ... Raw material, L ... Plastic raw material liquid

Claims (8)

An apparatus for preparing a plastic raw material liquid by mixing a plurality of different raw materials in order to inject an optical raw material liquid into a mold and produce an optical article,
A raw material storage container for storing each of the plurality of raw materials, a mixing unit for mixing the raw materials respectively transferred from these raw material storage containers to prepare the plastic raw material liquid, and mixing of the raw materials prepared in the mixing unit A device for preparing a plastic raw material liquid, comprising: a detection unit that detects a ratio. In the plastic raw material liquid compounding device according to claim 1,
The said mixing part mixes the said raw material continuously. The plastic raw material liquid preparation apparatus characterized by the above-mentioned. In the plastic raw material liquid compounding device according to claim 2,
The said detection part detects the light absorbency or transmittance | permeability of the said plastic raw material liquid. The plastic raw material liquid preparation apparatus characterized by the above-mentioned. In the plastic raw material liquid compounding device according to claim 2,
The said detection part detects the refractive index of the said plastic raw material liquid. The plastic raw material liquid preparation apparatus characterized by the above-mentioned. In the plastic raw material liquid compounding apparatus according to claim 2 or 3,
A plastic raw material liquid preparation device, wherein a dye is added to a part of the plurality of raw materials. In the plastic raw material liquid compounding apparatus according to claim 2 or 3,
An ultraviolet absorber is added to a part of the plurality of raw materials. In the plastic raw material liquid compounding device according to any one of claims 2 to 5,
Part of the plurality of raw materials is a composition containing a polyiso (thio) cyanate compound, and at least another part is a composition containing a polythiol compound. In the plastic raw material liquid compounding device according to any one of claims 2 to 5,
Part of the plurality of raw materials is a composition containing an episulfide compound, and at least another part is a composition containing a polythiol compound.

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