JP5166785B2 - Manufacturing method of polarizing plastic lens - Google Patents

Description

  The present invention relates to a method for producing a polarizing plastic lens used for an eyeglass lens, a camera lens, an image display body of a liquid crystal display device, and the like.

Conventionally, a polarizing plastic lens having a polarizing film held therein has been widely used for an eyeglass lens, a camera lens, an image display body of a liquid crystal display device, or the like. For example, Patent Document 1 is cited as an example of a method for manufacturing such a polarizing plastic lens. Patent Document 1 is a technology related to a polarizing plastic lens for spectacles, and as shown in FIG. 2, with a polarizing film held in a mold, a monomer (polymerization raw material) prepared in a cavity in the mold is filled and heated. In general, it is produced so that it is demolded after being cured. With such a manufacturing method, a polarizing plastic lens in which a polarizing film as shown in FIG. 1 of Patent Document 1 is sandwiched between the front and back surfaces by a lens can be obtained.
Japanese Patent Laid-Open No. 2005-99687

By the way, in general, a polarizing film is made by impregnating a uniaxially stretched plastic film with a polarizer so as to have a polarizing property. Therefore, a single polarizing film has a property of being easily rounded along a stretching direction. In particular, polarized plastic lenses for glasses use a polarizing film that is formed by pressing a film sheet and curving into a spherical shape in order to make the polarizing film follow the lens curve. As shown in FIG. 2 of Patent Document 1, the work of setting the polarizing film in the mold is very troublesome.
For this reason, there has been a demand for a method for producing a polarizing plastic lens in which the polarizing film is not easily rounded when the polarizing film is set in the mold, and the mold is easily assembled when the polarizing film is held inside.
The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a method for producing a polarizing plastic lens in which the polarizing film is not easily rounded and the mold assembly when holding the polarizing film inside is simple.

In the first means in order to achieve the above object, to form a Chotei portion of a pair which surrounds a predetermined area, respectively a position facing the front and back by placing the resin with a plastic polarizing film, the same resin After solidifying, the first and second lens molds are brought into contact with the two long bank portions, respectively, and the polarizing film, the first and second lens molds and the long bank portion are used to form the polarizing film. By forming two cavities that are separated from the outside on the front and back, filling the cavity with a plastic lens monomer, curing the monomer, and then releasing the first and second lens molds. The gist of the invention is to obtain a polarizing plastic lens in which the polarizing film is held.
In the second means, to form a Chotei portion of a pair which surrounds a predetermined area, respectively a position facing the front and back by placing the resin with a plastic polarizing film, after solidifying the same resin, monomer The long bank on one side of the polarizing film is brought into contact with the first lens mold disposed so as to be completely immersed in the monomer in a container containing The first lens mold, the polarizing film, and the second lens mold are sequentially connected in series so that the second lens mold is brought into contact with the first and second parts. After the monomer is sealed in the cavity formed by the second lens mold and the long bank portion and separated from the outside world, after the sealing is completed, the remaining monomer in the container is removed and the monomer is cured. Same as above Said polarizing film therein by causing release beauty second lens mold is to obtain a plurality of polarizing plastic lens held as its gist.
In the third means, to form a Chotei portion of a pair which surrounds a predetermined area, respectively a position facing the front and back by placing the resin with a plastic polarizing film, after solidifying the same resin, monomer The long bank on one side of the polarizing film is brought into contact with the first lens mold disposed so as to be completely immersed in the monomer in a container containing The first lens mold, the polarizing film, and the second lens mold are sequentially connected in series so that the second lens mold is brought into contact with the first and second parts. The monomer is sealed in a cavity defined by the second lens mold and the long bank portion, and the mold is removed from the container after the sealing is completed, and the monomer is cured. And as its gist in that the polarizing film therein by causing release of the second lens mold is to obtain a plurality of polarizing plastic lens held.
Further, in the fourth means, in addition to any one of the first to third means, the polarizing film is cut along a peripheral edge of the curved body obtained by pressing a uniaxially stretched flat plastic film sheet. The gist of the invention is that the polarizing film is cut after the long bank portion is formed at a position adjacent to the flat portion.
Further, the fifth means is characterized in that, in addition to any one of the first to fourth means, the resin is a photocurable resin.

According to the first means, first, a pair of long bank portions are formed so as to have a uniform height along the longitudinal direction surrounding a certain area by raising a plastic resin at opposite positions on the front and back sides of the polarizing film. To go. That is, the same position on the front and back of the polarizing film is surrounded by a long bank with a uniform height. Here, the long bank portion may be partially cut. This is because an opening for injecting the resin may be formed. In the case where the peripheral portion of the molded plastic lens is largely cut, the cut line may be relatively large. The shape of the region surrounded by the long bank portion is not limited to a circle.
The resin for molding the long bank is a fluid plastic resin, and thermosetting and photo-curing plastics can generally be used. However, in order to exclude thermoplastics and elastomers, Absent. However, photocurable plastics are particularly preferred because they can be cured in a short time and with simple equipment. It is required that the long bank portion after curing does not have great elasticity and does not easily deform due to external force. However, it does not necessarily need to be hard and solidified like glass, and may have some elasticity. Rather, it is preferable to have some elasticity (flexibility) in consideration of adhesion to the first and second lens molds.
The first and second lens molds are brought into contact with the long bank portions at the stage where the long bank portions formed on the front and back surfaces of the polarizing film are solidified by heat treatment or irradiation treatment with a large amount of energy. The film, the first and second lens molds, and the long bank portion form two cavities that are separated from the outside on the front and back of the polarizing film.
The first and second lens molds are generally made of glass, thermosetting plastic, or the like. It is also free to use molds of other materials. The cavity is filled with a monomer for a plastic lens. The monomer filling operation was performed as in the case of the syringe, and even if the injection nozzle (needle) was injected and filled into the boundary between the long bank part and the long bank part and the polarizing film, a cut was formed in the long bank part as described above. In that case, the portion may be filled as an injection port. It is preferable that the first and second lens molds are firmly fixed so as not to be separated by any fixing means (displacement prevention means), for example, a clip or a tape.

  In this way, the monomer is solidified for the first and second lens molds in which the cavity is filled with the monomer. Examples of the solidification means include heat heating by heat treatment, dielectric heating by microwave irradiation, and photocuring by irradiation of high energy rays such as ultraviolet rays. After the monomer is solidified, the first and second lens molds are released according to a conventional method to obtain a polarizing plastic lens. The obtained polarized plastic lens can be used as a product as it is, and further, a polarized plastic lens having a desired shape or desired lens characteristics can be obtained by cutting or grinding the periphery and the front and back surfaces of the lens. Good.

In addition, according to the second means, first, a pair of long bank portions that have a uniform height along the longitudinal direction that encloses a certain region by enlarging a plastic resin at opposite positions on the front and back sides of the polarizing film, respectively. Try to form. The points that may be partially cut, the type of resin, the solidification means, and the like are the same as the first means.
First arranged to be completely immersed in the monomer in a container containing the monomer at the stage where the long bank portions formed on the front and back of the polarizing film are solidified by heat treatment or irradiation treatment with high energy light. The first lens is successively arranged such that the long bank portion of one surface of the polarizing film is brought into contact with the lens mold and the second lens mold is brought into contact with the long bank portion of the other surface. The mold, the polarizing film, and the second lens mold are connected in series in this order. That is, the monomer is sealed in the cavity by arranging the first lens mold, the polarizing film, and the second lens mold so as to form a cavity while being immersed in the monomer. The first and second lens molds constituting the mold row are preferably firmly fixed so as not to be separated by any fixing means (displacement preventing means), for example, a press device.
Then, the remaining monomer in the container is removed after the encapsulation is completed. As a result, serial mold rows in which the monomers are sealed in the cavities remain in the container. And the monomer in these cavities is solidified. The solidifying means is the same as the first means. After the monomer is solidified, the first and second lens molds are released according to a conventional method to obtain a plurality of polarizing plastic lenses. The obtained polarized plastic lens can be used as a product as it is, and the peripheral edge and the front and back surfaces of the lens may be cut or ground to obtain a polarized plastic lens having a desired shape or desired lens characteristics. .

Further, according to the third means, first, a pair of long bank portions are formed so as to have a uniform height along a longitudinal direction enclosing a certain region by raising a plastic resin at opposite positions on the front and back sides of the polarizing film. Try to form. The points that may be partially cut, the type of resin, the solidification means, and the like are the same as the first means.
First arranged to be completely immersed in the monomer in a container containing the monomer at the stage where the long bank portions formed on the front and back of the polarizing film are solidified by heat treatment or irradiation treatment with high energy light. The first lens is successively arranged such that the long bank portion of one surface of the polarizing film is brought into contact with the lens mold and the second lens mold is brought into contact with the long bank portion of the other surface. The mold, the polarizing film, and the second lens mold are connected in series in this order. This is the same as the second means. The series mold rows in which the monomers are sealed in the cavities are taken out from the container, and the monomers in the cavities are solidified. The first and second lens molds constituting the mold row are firmly fixed by some fixing means (displacement prevention means), for example, a press device so that the mold constituting the row is not removed, and taken out together with the press device. It is preferable. The solidifying means is the same as the first means. After the monomer is solidified, the first and second lens molds are released according to a conventional method to obtain a plurality of polarizing plastic lenses. The obtained polarized plastic lens can be used as a product as it is, and the peripheral edge and the front and back surfaces of the lens may be cut or ground to obtain a polarized plastic lens having a desired shape or desired lens characteristics. .

  Furthermore, when the polarizing film used in such a manufacturing method is obtained by cutting a curved surface obtained by pressing a flat plastic film sheet uniaxially stretched along the periphery of the curved body, that is, in particular. In a polarizing film used for a meniscus-shaped lens such as a spectacle lens, it is preferable to form the long bank portion as described above and then cut the long bank portion. That is, by forming the long bank portion, the long bank portion plays a role of a kind of frame that presses the periphery of the polarizing film, so that the cut polarizing film can be reliably prevented from being rounded.

  In the inventions of the above-mentioned claims, the long bank part itself serves as a kind of mold by forming the long bank part so as to surround a certain region at a position opposite to the back surface of the polarizing film. A cavity that can accommodate the monomer inside can be formed together with the lens mold 2 and is held inside as a polarizing film, so that it can be polarized without taking time to set a polarizing film as in the past. This contributes to speeding up the assembly of the plastic lens mold, and when the polarizing film tends to curl as a result of stretching the polarizing film, the long bank holds the polarizing film like a kind of frame; Therefore, it is difficult to curl and easy to handle. Also it contributes to the reduction.

Hereinafter, a method for producing a polarizing plastic lens for spectacles will be described with reference to the drawings as a specific embodiment of the present invention.
Example 1
The manufacturing method according to the first embodiment of the present invention is roughly divided into five steps as shown in 16 (a). Hereafter, this process is demonstrated in order.
<Adjustment of polarizing film>
This step is a manufacturing step of the polarizing film 11 used in the method of this example. As shown in FIG. 1, two spherical curved surfaces 13 having the same shape are formed by pressing a flat sheet body 12 obtained by cutting a uniaxially stretched PVA (polyvinyl alcohol) film into a rectangular shape by a known pressing means. Is formed. The curve of the curved surface 13 is set to be substantially the same as the base curve of the polarizing plastic lens for spectacles to be manufactured. In the present embodiment, the sheet is further cut along a broken line K in the drawing while leaving the sheet body 12 portion around each curved surface 13. The cut sheet body 12 is referred to as a film base 15.

Next, the long bank portion 17 is formed on the front and back surfaces of the film base 15. Based on FIG.2 and FIG.3, the outline of the discharge apparatus 19 for forming the long bank part 17 is demonstrated. The discharge device 19 includes a main body 20 in which a motor device (not shown) is incorporated, a rotary shaft 21 protruding upward from the main body 20, and a turntable 22 disposed on the upper end of the rotary shaft 21. On the upper surface of the turntable 22, a flexible ring-shaped fixing pad 23 is set in contact with the vicinity of the back surface periphery of the curved surface 13 of the film base 15. The reason why the ring-shaped fixing pad 23 is used is that the fixing means for the film base 15 is not brought into contact with the light transmitting surface of the curved surface 13 as much as possible. A syringe 26 is attached to a rod 24 extending upward from the main body 20 via a slider 25. The syringe 26 discharges the viscous UV curable epoxy resin P from the needle 27 at the tip with a constant discharge amount by pneumatic control by a dispenser device in the main body 20 (not shown).
The discharge device 19 is provided with a UV irradiation device 28. A main body 29 of the UV irradiation device 28 is disposed on the slider 25, and an irradiation lamp 30 for irradiating ultraviolet rays is disposed adjacent to the syringe 26. The irradiation lamp 30 is aimed so that ultraviolet rays irradiate the vicinity of the front of the needle 27.
Actually, a plurality of turntables 22 and syringes 26 in the discharge device 19 are prepared, and many processes can be performed simultaneously.

Next, a method for forming the long bank portion 17 using such a discharge device 19 will be briefly described. 2 and 3, the film base 15 is placed on the fixed pad 23 of the turntable 22, the position of the syringe 26 is appropriately adjusted, and the needle 27 is placed on the curved surface 13 of the film base 15. It is arranged above the position close to the periphery of the curved surface 13. Then, the discharge device 19 is driven. That is, the turntable 22 is rotated to rotate the film base 15 in the circumferential direction, and the dispenser device is driven to discharge the UV curable epoxy resin P from the tip of the needle 27 toward the periphery of the curved surface 13 along the circumferential direction. The long bank portion 17 is formed. The height of the long bank portion 17 is formed at the same height over the entire circumference. At the same time, the UV irradiation device 28 is driven to irradiate ultraviolet rays from the tip of the irradiation lamp 30, and the discharged curable epoxy resin is continuously cured one after another from the discharged portion. And, for example, as shown in FIG. 2 (a), when the formation of the long bank portion 17 on the convex surface side is completed, the position opposite to the convex surface side and the film is also reversed on the concave surface side shown in FIG. 2 (b). Similarly, the long bank portion 17 is formed. If it is determined that the UV irradiation amount is insufficient, only the discharge operation of the curable epoxy resin is appropriately stopped, the turntable 22 is rotated, and the long bank portion 17 formed with UV irradiation by the UV irradiation device 28 is applied. It is also possible to continue. Further, only UV irradiation may be performed collectively in a subsequent process after the formation of the long bank portion 17. In the first embodiment, as shown in FIGS. 4A and 4B, the long bank portion 17 does not completely surround the inner region, but a slight gap (cut or groove) 31 is formed. As described above, the discharge-stop timing of the resin is controlled.
After the long bank portion 17 formed in this way is solidified, the position indicated by the arrow in FIG. 5, that is, the periphery of the curved surface 13 outside the long bank portion 17 (the marginal margin position or the peripheral position) is cut. Thus, the polarizing film 11 is obtained.
The polarizing film 11 obtained in this manner is uniaxially stretched and does not curl even though it is curved into a spherical shape. On the other hand, the same polarizing film 11 that does not form such a long bank portion 17 is strongly rounded by being cut.

<Assembly of mold>
As shown in FIGS. 6 and 7, the first and second molds 32 and 33 are sandwiched between the polarizing films 11 from the front and back directions of the polarizing film 11. Each of the first mold 32 and the second mold 33 is a meniscus circular plate-like body made of spherical surfaces having the same curvature on both the front and back surfaces. The back surface 32a of the first mold 32 is a curved surface for molding the front surface (object side) of the plastic lens to be molded, and the front surface 33a of the second mold 33 is the back surface (eyeball side) of the plastic lens to be molded. It is a curved surface for molding. As shown in FIG. 6, the back surface 32 a of the first mold 32 is brought into contact with the long bank portion 17 on the surface 11 a side of the polarizing film 11, and the surface 33 a of the second mold 33 is on the back surface 11 b side of the polarizing film 11. It is brought into contact with the long bank portion 17. A front-side cavity C1 is formed by the first mold 32, the polarizing film 11, and the long bank portion 17 on the front surface 11a side, and the second mold 32, the polarizing film 11, and the long bank portion 17 on the back surface 11a side. A cavity C2 is formed. The state of the first and second molds 32 and 33 assembled with the polarizing film 11 interposed therebetween is taken as a mother die 35. The mother die 35 is fastened by a clip 36 so that the first and second molds 32 and 33 are not separated from each other.

<Injection of monomer>
After the monomer prepared for the mother die 35 thus assembled is deaerated under reduced pressure, it is filled according to a conventional method from the gap 31 serving as a filling port using a syringe (not shown).
<Heating and curing>
A master mold 35 filled with a thermosetting plastic material is set in a heating tray 37 as shown in FIG. 11, and heated according to a conventional method. In this embodiment, it is introduced into a heating furnace and heated for 20 hours with a predetermined heating history. However, it may be introduced into a microwave generator and subjected to dielectric heating by microwave irradiation.
<Demolding>
When the heat treatment is completed, as shown in FIG. 8, the monomer is solidified, and a polarizing plastic lens 39 (in this embodiment, a concave lens having no degree) in which the polarizing film 11 is incorporated is molded. The mother die 35 is removed according to a standard method (state shown in FIG. 9), and finally the periphery is cut as shown in FIG. 10 to obtain a finished product (so-called round lens).

(Example 2)
The manufacturing method according to the second embodiment of the present invention is roughly divided into five steps as shown in FIG. Hereafter, this process is demonstrated in order.
<Adjustment of polarizing film>
Since this step is the same as that in Example 1, it is omitted.
<Assembly of mold>
A container 41 as shown in FIGS. 12 to 14 is prepared. The container 41 is a long rectangular box having an open top, and has a boat-shaped outer shape that is narrowed toward the lower side. That is, the front and rear walls 41a and 41b of the storage container 41 are inclined obliquely inward in a symmetrical state at the lower side to form an inclined wall 46. In the storage container 41, the prepared monomer M is stored up to the vicinity of the upper edge. 12 and 13, a movable wall 42 is disposed on the right side. The movable wall 42 is always urged in a direction away from the right side wall 41c by a coil spring 43 disposed between the right side wall 41c of the container 41. A press pin 44 protrudes inward from each of the movable wall 42 and the left side wall 41d facing the movable wall 42.
A mold using the first and second molds 32 and 33 similar to the first embodiment and the polarizing film 11 in which the long bank portion 17 is formed on the front and back in the above process in the container 41 containing the long bank portion 17. Build a column.

In the second embodiment, as shown in FIG. 12, the surface 32b of the first first mold 32 is brought into contact with the press pin 44 of the right side wall 41d, and then polarized on the back surface 32a of the first mold 32. The long bank portion 17 on the surface 11a side of the film 11 is brought into contact. Next, the front surface 33 a of the second mold 33 is brought into contact with the long bank portion 17 on the back surface 11 b side of the polarizing film 11. In this order, the first mold 32, the polarizing film 11 and the second mold 33 are connected one after another. As shown in FIG. 14, since the container 41 is supported from below by the inclined wall 43, the center of the first or second mold 32, 33 in the longitudinal direction automatically coincides by being lowered. It has become.
Along with the connection, cavities are successively formed by the first or second molds 32 and 33, the polarizing film 11, and the long bank portions 17 on the front and back sides. Since all the connecting operations are performed in the state of being immersed in the monomer M, the monomer M is automatically enclosed in the cavity.
As shown in FIG. 13, by connecting the mold row 47 to a position where the movable wall 42 is slightly pushed back, the mold row 47 is pressed from the front and back, so that the first or second mold 32 is not detached. Held in series.
<Release of monomer>
In this state, the monomer M in the storage container 41 is discharged from a drain (not shown) to make the storage container 41 empty.
<Heating and curing>
The entire container 41 in which the mold row 47 remains is heated according to a conventional method. In this embodiment, it is introduced into a heating furnace and heated for 20 hours with a predetermined heating history. However, it may be introduced into a microwave generator and subjected to dielectric heating by microwave irradiation.
<Demolding>
The mold row 47 after the heat treatment is removed according to a standard method, and finally the periphery is cut to obtain a finished product (so-called round lens).

(Example 3)
The manufacturing method according to the third embodiment of the present invention is roughly divided into five steps as shown in FIG. Hereafter, this process is demonstrated in order.
<Adjustment of polarizing film>
Since this step is the same as that in Example 1, it is omitted.
<Assembly of mold>
Since this process is basically the same as that of the second embodiment, a description thereof will be omitted.
<Removal from monomer>
In Example 2, the monomer M in the storage container 41 is released from the drain. However, in Example 3, the storage container 51 is doubled as shown in FIG. 15, and the mold row 47 is held. The inner container 52 has an opening 53 (open) 53 at the bottom. Therefore, by pulling the inner container 52 upward from the outer container 54, the mold row 47 is taken out of the outer container 54 together with the inner container 52 and is removed from the immersion state of the monomer M. Monomer M remains on the outer container 54 side.
<Heating and curing>
The taken out inner container 52 is heated together with the inner container 52 according to a conventional method. In this embodiment, it is introduced into a heating furnace and heated for 20 hours with a predetermined heating history. However, it may be introduced into a microwave generator and subjected to dielectric heating by microwave irradiation.
<Demolding>
The mold row 47 after the heat treatment is removed according to a standard method, and finally the periphery is cut to obtain a finished product (so-called round lens).

With this configuration, the present embodiment has the following effects.
(1) By forming the long bank portion 17 so as to surround a certain region at the opposite position of the back surface of the polarizing film 11, the long bank portion itself serves as a kind of mold, and the master block 35 or the mold row 47 can be easily constructed, which contributes to speeding up the assembly work of the mother die 35 or the mold row 47.
(2) The long bank portion 17 fixes the polarizing film 11 like a kind of frame by forming the long bank portion 17 so as to surround a certain area at a position opposite to the back surface of the polarizing film 11. Since the polarizing film 11 is difficult to be rounded and is easy to handle, it contributes to the efficiency of the assembly work of the mold using such a polarizing film 11 and, as a result, contributes to cost reduction.
(3) In Example 2 and Example 3, the first mold 32, the polarizing film 11 and the second mold 33 are simply arranged in this order, and a large number of monomers filled with the polarizing film 11 are filled (encapsulated). Thus, the construction of the cavity for manufacturing the polarizing plastic lens can be made much faster and simpler than before, which contributes to the cost reduction as a whole.

It should be noted that the present invention can be modified and embodied as follows.
In the above embodiment, the long bank portion 17 is solidified by irradiating with ultraviolet rays using a photo-curing resin, but may be solidified by heating using a thermoplastic resin.
In the above embodiment, the long bank portion 17 is formed by rotating the polarizing film 11 side. However, the long wall portion 17 may be formed by moving the syringe 26 side.
In the above embodiment, the long bank portion 17 is partially formed with the gap 31. However, the long bank portion 17 may have a configuration in which there is no gap 31 and the entire circumference is surrounded by the long bank portion 17.
In the above description, the polarizing film 11 curved in a spherical shape is given as an example. However, the polarizing film 11 may be applied to a flat polarizing film 11. Moreover, the polarizing film 11 does not necessarily need to be comprised by the surrounding circular shape.
-The material of the polarizing film 11 is not limited to the above. In the above embodiment, PVA is used, but other plastics such as polyethylene can also be used.
In the second and third embodiments, the first and second molds 32 and 33 are alternately used, but only one of the first and second molds 32 and 33 is used. It may be. In that case, the curvatures of the front and back curves of the first or second molds 32 and 33 may be different. This is because a concave or convex lens is formed.
The means for preventing the displacement of the first and second molds 32 and 33 when the mother die 35 or the mold row 47 is constructed may be a means other than the movable wall 42 urged by the clip 36 or the coil spring 43. I do not care.
The configuration of the discharge device 19 is an example, and can be freely changed to a means for forming the other long bank portion 17 realized by another configuration.
-Besides, it is free to implement in a mode that does not depart from the gist of the present invention.

The perspective view of the film base produced from the sheet | seat body which is a precursor of the polarizing film used for each Example of this invention, and a sheet | seat body. (A) is explanatory drawing explaining the formation method which forms a long bank part on the convex surface side of a film base, (b) is explanatory drawing explaining the formation method which forms a long bank part on the concave surface side of a film base. The front view of the discharge apparatus for forming a long bank part. (A) is a perspective view of the film base with the convex surface side facing upward, and (b) is a perspective view of the film base with the concave surface side facing upward. Explanatory drawing which cuts the periphery of a film base and forms a polarizing film after forming a long bank part. Sectional drawing of the mother die of Example 1. FIG. The exploded perspective view of the same mother mold. Sectional drawing of the state in which the monomer in the same mother mold hardened and a polarization plastic lens was fabricated. Sectional drawing of the polarizing plastic lens removed from the same mother mold. Sectional drawing of the state which cut | disconnected the periphery of the polarizing plastic lens of FIG. The partial omission partial sectional view explaining the state which set the mother block which inject | poured the monomer into the heating tray. Explanatory drawing explaining the state arrange | positioned in order of the 1st mold, the polarizing film, and the 2nd mold in the storage container satisfy | filled with the monomer in order to manufacture a polarizing plastic lens in Example 2. FIG. Explanatory drawing explaining the state arrange | positioned in order of the 1st mold, the polarizing film, and the 2nd mold in the storage container satisfy | filled with the monomer in order to manufacture a polarizing plastic lens in Example 2. FIG. FIG. 14 is a cross-sectional view visually observed at a cross-sectional position along line AA in FIG. 13. Explanatory drawing explaining the state arrange | positioned in order of the 1st mold, the polarizing film, and the 2nd mold in the storage container satisfy | filled with the monomer in order to manufacture a polarizing plastic lens in Example 3. FIG. (A) Process explanatory drawing explaining the process of Example 1, (b) Process explanatory drawing explaining the process of Example 2, (c) Process explanatory drawing explaining the process of Example 3. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Polarizing film, 17 ... Long bank part, 32 ... 1st mold, 33 ... 2nd mold, 41 ... Storage container as a container, C1, C2 ... Cavity, M ... Monomer, P ... UV hardening as resin Epoxy resin.

Claims (5)

To form a Chotei portion of a pair which surrounds a predetermined area, respectively a position facing the front and back by placing the resin with a plastic polarizing film, after solidifying the same resin, the first and second lens mold Are formed on the front and back surfaces of the polarizing film by the same polarizing film, the first and second lens molds, and two cavities that are partitioned from the outside world, Filling the cavity with a monomer for a plastic lens, curing the monomer, and then releasing the first and second lens molds to obtain a polarizing plastic lens holding the polarizing film therein. A method for producing a polarizing plastic lens, characterized in that it is configured as described above. To form a Chotei portion of a pair which surrounds a predetermined area, respectively a position facing the front and back by placing the resin with a plastic polarizing film, after solidifying the same resin, in a vessel monomer is housed same The first lens mold disposed so as to be completely immersed in the monomer is brought into contact with the long bank portion of one surface of the polarizing film, and the second lens mold is mounted on the long bank portion of the other surface. The first lens mold, the polarizing film, and the second lens mold are connected in series in this order so that the first and second lens molds and the second lens mold are in contact with each other. The first and second lenses are encapsulated in a cavity defined by the long bank and enclosed by the outside, and after the completion of encapsulation, the remaining monomer in the container is removed and the monomer is cured. For Mo Method of manufacturing a polarizing plastic lens, wherein the polarizing film therein by causing release of the de is to obtain a plurality of polarizing plastic lens held. To form a Chotei portion of a pair which surrounds a predetermined area, respectively a position facing the front and back by placing the resin with a plastic polarizing film, after solidifying the same resin, in a vessel monomer is housed same The first lens mold disposed so as to be completely immersed in the monomer is brought into contact with the long bank portion of one surface of the polarizing film, and the second lens mold is mounted on the long bank portion of the other surface. The first lens mold, the polarizing film, and the second lens mold are connected in series in this order so that the first and second lens molds and the second lens mold are in contact with each other. A monomer is sealed in a cavity defined by the long bank and the outside, and after the sealing is completed, the mold row is taken out of the container, and the monomer is cured, and then the first and second lens modules are used. Method of manufacturing a polarizing plastic lens, wherein said that the polarizing film was set to obtain a plurality of polarizing plastic lens held therein by causing release of the shield. The polarizing film is obtained by cutting a curved surface obtained by pressing a uniaxially stretched flat plastic film sheet along the periphery of the curved body, and the polarizing film is cut off by flattening the long bank portion. The method for producing a polarizing plastic lens according to any one of claims 1 to 3, wherein the method is performed after being formed at a position adjacent to the portion. The method for producing a polarizing plastic lens according to claim 1, wherein the resin is a photocurable resin.

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