JP2001100160A - Composite molding utilizing polycarbonate polarizing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite molding utilizing a polycarbonate polarizing plate allowing the manufacture of a polarizing lens for spectacles which has excellent impact resistance and is capable of correcting visual acuity without making combination use of sunglasses and another spectacles. SOLUTION: This composite molding has protective layers 2 and 5 consisting of polycarbonate subjected to an annealing or stretching treatment and an untreated layer 6 consisting of the polycarbonate not subjected to the annealing or stretching treatment. A polarizing film 3 is interposed between the protective layer 2 and the protective layer 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite molded article using a polycarbonate polarizing plate.

[0002]

2. Description of the Related Art Conventional polarizing lenses and sheets are shown in FIG.
As shown in the figure, the polarizing films 33 are interposed between the protective materials 31 and 32. In this type of polarizing lens or polarizing sheet, when the protective materials 31 and 32 are made of glass, the protective materials are not bonded. The materials 31, 32 are annealed, and the protection materials 31,
32 is made of plastic, the protective materials 31, 3
It is common to use a material in which the internal stress has been relaxed by stretching 2. As shown in FIG. 6, in a polarizing lens made of a thermosetting resin, CR-39, a polarizing sheet using triacetate as a base material 31 or 32 is subjected to a heat bending process, and then put into a casting glass mold for a long time. It is made so as to be hardened and integrated so that no internal stress remains in CR-39. When the protective members 31 and 32 are made of polycarbonate, those described in FIG. 5 are currently commercially available.

[0003]

However, polycarbonate polarizing lenses and polarizing sheets which are currently commercially available have a maximum thickness T of 1.5 mm, and polycarbonate is excellent in impact resistance, but is intense at present. Sports requiring movement, especially outdoor sports, require a commercially available polarizing polycarbonate lens having a thickness of 1.5 mm or more. Furthermore, when a person wearing spectacles performs outdoor sports, there is no polycarbonate polarized lens for correcting vision, and the spectacles currently worn are often used with a front apron, etc. Was.

The present invention has been made in view of the above-mentioned conventional problems, and provides a polarizing plate made of polycarbonate capable of producing a polarizing lens for spectacles having excellent impact resistance and capable of correcting eyesight without using another spectacle. An object of the present invention is to provide a composite molded article utilizing the same.

[0005]

A first technical means of the present invention for solving this technical problem is to provide a protective layer 2 or 5 made of polycarbonate whose internal stress has been relaxed by annealing or stretching, and annealing or stretching. A polarizing film 3 having an untreated layer 6 made of untreated polycarbonate, wherein a polarizing film 3 is interposed between the protective layer 2 and the protective layer 5;
Is located on the front side with respect to the lens thickness center. The second technical means of the present invention is that the untreated layer 6 is composed of the protective layer 2 and the protective layer 5.
In that it is formed to be thicker than the total thickness.

A third technical means of the present invention is to provide a protective layer 2, 5 made of an annealed or stretched polycarbonate.
And a lens 4 including an unprocessed layer 6 made of polycarbonate that has not been annealed or stretched as it is injection molded, is laminated in a polymerized manner with the polarizing film 3 interposed therebetween, and the thickness of the unprocessed layer 6 is protected. The point is that it is formed larger than the thickness of the layers 2 and 5. A fourth technical means of the present invention resides in that the layer of the lens 4 which is in contact with the polarizing film 3 is annealed or stretched.

[0007]

The inner surface of the untreated layer 6 can be polished, and a wide range of lenses can be manufactured according to the visual acuity. Further, since the lens 4 does not need to be annealed for the unprocessed layer 6,
The cost can be reduced, and the untreated layer 6 is located on the inner surface side of the polarizing film 3, so that even if the lens 4 includes the untreated layer 6, no inconvenience is caused by the polarizing film.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a composite molded product using a polycarbonate polarizing plate, which includes protective layers 2 and 5, a polarizing film 3, and an untreated layer 6 in a laminated state. The protective layers 2 and 5 are made of an annealed or stretched polycarbonate. The lens 4 has protective layers 2 and 5 and an untreated layer 6, and the protective layer 5 is made of polycarbonate that has been annealed or stretched in the same manner as the protective layer 2. The untreated layer 6 is made of polycarbonate whose internal stress such as annealing or stretching has not been relaxed as it is after injection molding. The untreated layer 6 is press-bonded to the inner surface of the protective layer 5 by injection molding. The thickness of the untreated layer 6 is larger than the total thickness of the protective layers 2 and 5.
The protective layer 2 and the protective layer 5 have the same thickness, and the total thickness is about 0.5 to 0.8 mm.

The polarizing film 3 is interposed between the protective layer 2 and the protective layer 5 and adhered to the protective layer 2 and the protective layer 5, respectively, whereby the unprocessed protective layer 2 and the protective layer 5 are integrated. The layer 6 is laminated in a polymer state with the polarizing film 3 interposed therebetween. Next, the protective layers 2 and 5 of the composite molded article 1 are made of an annealed or stretched polycarbonate, and the untreated layer 6 is provided and the thickness of the untreated layer 6 is set to be smaller than the total thickness of the protective layers 2 and 5. The reason for the large formation will be described. FIG. 3 is a schematic diagram of a method used for visualizing and observing the internal stress of an object. A polarizing object (for example, a polarizing sheet) 11 having a polarizing property is placed between a light source 9 and a test object 10. Test object 1
0 and an observer, a polarizing object 12 having a polarizing property is placed, and the polarizing axis of the polarizing object 12 is arranged so as to be perpendicular to the polarizing axis of the polarizing object 11. Looking at the object 10 side, the internal stress of the test object 10 can be seen. This is a method used for a photoelastic test of the test object 10.

Then, as shown in FIG. 4, a substrate 15 having a distortion is placed in front of the polarizing sheet 16 and
When the base material 15 is viewed through, the light having a polarized light component from a blue sky, a uniform cloudy sky, or a reflected light beam other than the metal surface causes the internal stress due to the same effect as in the photoelasticity test of the test object 10 described above. Is not only visualized and hinders the field of view, but also causes a so-called color omission of the polarizing lens (color of the lens causes color unevenness depending on portions). Therefore, paying attention to this point, the composite molded article 1 is completed, and the protective layer 2 on one side (front side) of the polarizing film 3 is made of polycarbonate whose internal stress is relaxed by annealing or stretching. To prevent the internal stress from being visualized and hindering the field of view, to prevent the occurrence of color unevenness,
The thickness of the lens 4 on one side (front side) is made larger than the total thickness of the protective layer 2 and the protective layer 5 so that a sufficient thickness can be polished. It was made to have.

Since the thickness of the lens can be made large, it is excellent in impact resistance. The inner surface can be polished according to visual acuity and a wide range of lenses can be manufactured. Good visibility (no residual internal stress is visible). In order to manufacture a polarizing lens for spectacles from the above-described composite molded article 1 at a low cost and without causing any problems associated with the treatment, the inner surface side of the untreated layer 6 of the composite molded article 1 is shown by a chain line in FIG. Polishing may be performed, and the polarizing lens 7 for glasses may be easily manufactured as shown in FIG.

[0012]

According to the present invention, the protective layers 2 and 5 made of an annealed or stretched polycarbonate and the untreated layer 6 made of a polycarbonate not annealed or stretched are provided. Since the polarizing film 3 is interposed between the treated layer 5 and the untreated layer 6, it is possible to form the untreated layer 6 thicker than the protective layer 2. By increasing the thickness more than the total thickness, it is possible to increase the strength, improve the impact resistance, improve the safety, and correct the vision without using another pair of glasses It is also possible to easily manufacture a polarizing lens for spectacles capable of performing the method.

According to the present invention, the protective layer 2 and the protective layer 5 made of an annealed or stretched polycarbonate.
And a lens 4 including an untreated layer 6 made of polycarbonate that has not been annealed or stretched while being injection-molded, is laminated in a polymerization manner with the polarizing film 3 interposed therebetween, and the thickness of the untreated layer 6 is reduced. Since the thickness is larger than the total thickness of the protective layer 2 and the protective layer 5, the polishing according to the visual acuity can be performed in a wide range, and the visibility can be improved. In addition, the inside can be made cheap by stretching or not annealing,
Also, there is no problem associated with the processing. Therefore, it is also possible to easily produce a spectacle polarized lens having excellent impact resistance and capable of correcting vision without using another spectacle.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view of a spectacle polarized lens manufactured using a composite molded product.

FIG. 3 is a configuration diagram for explaining an operation.

FIG. 4 is a configuration diagram for explaining an operation.

FIG. 5 is a sectional view showing a conventional example.

FIG. 6 is a sectional view showing another conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 composite molded product 2 protective layer 3 polarizing film 4 lens 5 protective layer 6 untreated layer

Claims (4)

[Claims] 1. A protective layer (2) (5) made of an annealed or stretched polycarbonate, and an untreated layer (6) made of a polycarbonate not annealed or stretched. A composite molded article using a polycarbonate polarizing plate, wherein a polarizing film (3) is interposed between the protective layer (5) and the protective layer (5). 2. An untreated layer (6) comprising a protective layer (2).
The composite molded article using a polycarbonate polarizing plate according to claim 1, wherein the composite molded article is formed to be thicker than the total thickness of (5). 3. A lens (4) including a protective layer (2) (5) made of an annealed or stretched polycarbonate and an untreated layer (6) made of a polycarbonate that has been annealed and not annealed or stretched. )
A polycarbonate film, wherein the untreated layer (6) is formed in a polymerized state with the polarizing film (3) interposed therebetween, and the thickness of the untreated layer (6) is larger than the thickness of the protective layers (2) and (5). Composite molded product using a polarizing plate. 4. The composite molded article using a polycarbonate polarizing plate according to claim 1, wherein a layer of the lens (4) in contact with the polarizing film (3) has been annealed or stretched.