JP2004302398A - Polarizing resin lens and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a polarizing resin lens to which polarizing film is firmly bonded, which keeps antidazzle performance and which is excellent in productivity. <P>SOLUTION: The polarizing film is previously formed to be nearly fit to the shape of a lens substance 2, and both surfaces of a polarizing film formed body 4 are coated with a primer and dried. Next, the formed body 4 is placed on the recessed surface of a forming die and its entire upper surface is coated with a proper amount of a UV adhesive so as to form a UV adhesive layer 3. The lens substance 2 is superposed on the layer 3 and pressured, and the formed body 4 is temporarily attached to the lens substance. They are introduced into a UV irradiation device and irradiated with UV, and both of them are perfectly stuck to each other so as to obtain a lens laminated base substance 5. Furthermore, the lens laminated base substance is temporarily released from the forming die 7. Then, the recessed surface of the forming die is filled with a proper amount of thermosetting resin monomer and the lens laminated base substance is placed on the thermosetting resin monomer and put in an oven so as to be heated, whereby thermosetting resin monomer is polymerized/thermoset, and then the polarizing resin lens 1 is manufactured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizing resin lens which has a strong bonding of a polarizing film, maintains an antiglare property, and is excellent in productivity, and a method for producing the same.
[0002]
2. Description of the Related Art Conventionally, there has been known a polarizing resin lens formed by bonding a polarizing film to the surface of a lens made of a thermoplastic resin or a thermosetting resin, and a method of manufacturing the same.
[0003]
A conventional polarizing resin lens is constructed by applying an adhesive to the surface of a lens substrate, laminating a polarizing film, and adhering the two. It is easy to be deviated from wrinkles, etc., and there is a problem with the adhesion of the polarizing film, as well as the problem that the anti-glare performance deteriorates in a short period of time, the yield of polarizing resin lenses is poor, the production efficiency is low, and the cost is high. There were disadvantages.
An object of the present invention is to eliminate the above-mentioned disadvantages.
[0004]
Therefore, in order to achieve the above-mentioned object, a polarizing film is preliminarily formed so as to substantially conform to the shape of a lens substrate, and a primer is applied to both surfaces of the polarizing film molded body and dried. . Next, the polarizing film molded body is placed on the concave surface of the mold, and an appropriate amount of UV adhesive is uniformly applied on the entire upper surface to form a UV adhesive layer. Further, a lens substrate is superimposed on the UV-based adhesive layer and slightly pressed to temporarily adhere the polarizing film molded body to the lens substrate. This is introduced into a UV irradiator to perform UV irradiation, and both are completely adhered to each other to form a lens laminated substrate. Further, the lens laminated substrate is once released from the mold. Furthermore, the concave surface of the mold is filled with an appropriate amount of a thermosetting resin monomer, and the lens laminated substrate is placed on the thermosetting resin monomer and placed open, and the thermosetting resin monomer is polymerized and cured. To produce a polarizing resin lens.
[0005]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a polarizing resin lens and a method of manufacturing the same according to the present invention will be described below in detail with reference to model drawings.
The polarizing resin lens 1 is mainly composed of a lens base 2 and a polarizing film molded body 3.
[0006]
The lens substrate 2 is made of a transparent or translucent resin obtained by molding a conventionally used resin by a casting method, an injection molding method, or the like, and has a circular shape with a diameter of about 65 mm to 100 mm, and has a conical convex shape on a side surface. Has made.
[0007]
The polarizing film molded body 3 is formed by sandwiching a thin film made of polyvinyl alcohol (PVA), polycarbonate (PC), or polyacrylate (PA) between two molding dies, and applying heat and pressure to the surface of the lens substrate 2. A curved surface is imparted, cooled, and released from the mold. An appropriate number of the polarizing film molded bodies 4 are prepared, and primers are applied to both front and back surfaces thereof, followed by drying treatment.
[0008]
It is preferable that the mold for the polarizing film is made of glass or metal.
[0009]
Next, the polarizing film molded body 3 is placed on a molding die 7 having a conical concave surface corresponding to the front surface side of the lens substrate 2, and an appropriate amount of a UV adhesive is applied to the upper surface of the polarizing film molded body 3. A uniform UV-based adhesive layer 4 is formed by coating, and the surface (cone-shaped convex surface) of the lens substrate 2 is overlapped on the UV-based adhesive layer 4 so as to correspond to the molding die 7 and the lens substrate 2. Both are pressed for a short time, and the polarizing film molded body 3 is temporarily adhered to the surface of the lens substrate 2 once. In this manner, the polarizing film molded body 3 is guided to the UV irradiation device without being detached from the molding die 7 in a state of being temporarily adhered to the surface of the lens substrate 2 (not shown), and 10 seconds from above the molding die 7 UV irradiation is performed for 120 seconds to form the first laminated lens laminated substrate 5, and the lens laminated substrate 5 is once released from the mold 7.
In addition, the concave surface of the mold 7 is uniformly filled with an appropriate amount of a thermosetting resin monomer, and the lens laminated substrate 5 is placed on the thermosetting resin monomer. ), The thermosetting resin monomer is polymerized and cured at a temperature of 35 ° C. to 90 ° C. for 8 to 20 hours to produce a polarizing resin lens 1.
In addition, as a thermosetting resin monomer, CR-39 (allyl diglycol carbonate) and TS-16 (diethylene bis allyl carbonate) are suitable, but not limited thereto.
In the figure, reference numeral 6 denotes a thin thermosetting resin monomer layer, and the thermosetting resin monomer layer 6 functions as a thin lens covering the surface of the lens laminated substrate 5.
[0010]
The non-oxidizing atmosphere constant temperature open is filled with an inert gas such as nitrogen gas, and thermal polymerization is performed in a non-oxidizing atmosphere to further promote the polymerization / curing action.
[0011]
Reference numeral 8 denotes a molding stand used to stabilize the molding die 7.
[0012]
Although the polarizing resin lens 1 is mainly used for sunglasses, it goes without saying that the polarizing resin lens 1 includes a lens having no power and a lens having power.
[0013]
The polarizing resin lens 1 according to the present invention is obtained by molding a polarizing film so as to substantially conform to the shape of the lens substrate 2, applying a primer to both surfaces of the polarizing film molded body 3, and drying the primer. Next, the polarizing film molded body 3 is placed on the concave surface of the molding die 7, and the UV adhesive is uniformly applied to the entire upper surface to form the UV adhesive layer 4. Further, the lens substrate 2 is superimposed on the UV-based adhesive layer 4, and the polarizing film molded body 3 and the lens substrate 2 are temporarily bonded to each other by applying a slight pressure. The lens laminated substrate 5, which is a joined body of the lens substrate 2 and the polarizing film molded body 3, is once released from the molding die 7. Further, the concave surface of the mold 7 is uniformly filled with an appropriate amount of a thermosetting resin monomer, and the lens laminated substrate 5 is placed on the thermosetting resin monomer. ), And heats to polymerize and cure the thermosetting resin monomer to produce a polarizing resin lens. Therefore, the polarizing film molded article 3 may be deviated from a predetermined position or become wrinkled. And the effect that the lens substrate 2 and the polarizing film molded body 3 are completely bonded, the effect that the performance of the polarizing resin lens 1 maintains a stable state without distortion for a long time, and the anti-glare performance are improved. Has the effect of not deteriorating.
Further, since the yield is remarkably improved, the production efficiency is improved, and the manufacturing cost of the polarizing resin lens 1 can be reduced.
Further, the concave surface of the mold 7 is uniformly filled with an appropriate amount of a thermosetting resin monomer, and the lens laminated substrate 5 is placed on the thermosetting resin monomer layer 6 and placed in a non-oxidizing atmosphere air-conditioned. Since the thermosetting resin monomer is polymerized and cured by heating, the thermosetting resin monomer layer 6 has the effect of functioning as a thin lens covering the surface of the lens laminated substrate 5 and the bonding and bonding are complete. In addition, there is an effect that it is hard to be damaged and endures long-term use.
It is needless to say that the polarizing plastic lens 1 has a degree of polarization of substantially the same degree as that of a conventionally known polarizing lens of 90% or more, and can completely prevent glare of reflected light.
[Brief description of the drawings]
FIG. 1A is a front view of a polarizing resin lens, and FIG. 1B is a longitudinal sectional view of a central portion of the polarizing resin lens.
FIG. 2 is an explanatory view showing a polarizing resin lens in a disassembled state.
FIG. 3 is a vertical sectional view of a central part of a main part showing a method for manufacturing a polarizing resin lens.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Polarized resin lens 2 Lens base 3 UV adhesive layer 4 Polarized film molded body 5 Lens laminated base 6 Thermosetting resin monomer layer 7 Mold 8 Molding stand

Claims (2)

The polarizing film molded body 3 that has been subjected to the primer coating treatment is placed on a molding die 7 and the UV adhesive layer 4 is formed on the upper surface thereof. The lens substrate 2 is superimposed on the UV-based adhesive layer 4 and pressurized to temporarily bond the two, and this is introduced into a UV irradiation device, and is irradiated with UV to form a lens-bonded substrate 5 that is primarily bonded. The lens laminated substrate 5 is once released from the mold 7. Further, a thermosetting resin monomer layer 6 is provided on the concave surface of the mold 7, and the lens laminated substrate 5 is placed on the thermosetting resin monomer layer 6 and is opened, and heated to remove the thermosetting resin monomer. A lens made of a polarizing resin mainly composed of a lens substrate 2 and a polarizing film molded body 3 manufactured by a method of being polymerized, cured, and joined and integrated. A polarizing film is preliminarily formed so as to substantially conform to the shape of the lens substrate 2, and a primer is applied to both surfaces of the polarizing film formed body 3 and dried. The polarizing film molded body 3 is placed on the concave surface of the mold 7, and an appropriate amount of UV adhesive is uniformly applied on the entire upper surface thereof to form the UV adhesive layer 4. Next, the lens substrate 2 is superimposed on the UV-based adhesive layer 4 and slightly pressed to temporarily adhere the polarizing film molded body 3 and the lens substrate 2 to each other, introduced into a UV irradiation device and irradiated with UV, This is a lens laminated substrate 5 that has been primarily bonded. Further, the lens laminated substrate 5 is once released from the mold 7. Further, the concave surface of the mold 7 is filled with an appropriate amount of a thermosetting resin monomer, and the lens laminated substrate 5 is placed on the thermosetting resin monomer layer 6 and put in an open state. A method for producing a polarizing resin lens, comprising polymerizing, curing, and joining together.

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