JP2008276150A - Optical molded laminate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical molded laminate capable of coping with the lot-size reduction and diversification by applying a print technology to a raw film in the case of the coloring with the conventional dying or resin coloring, with respect to the optical molded laminate used as sun glass lens, sport goggle lens, corrective lens or the like. <P>SOLUTION: The optical molded laminate having polarization performance which is made to correspond to various colors and designs can be obtained as follow: color printing is performed by using a transparent ink comprising a transparent colorant on one surface of a polarizing sheet obtained by sticking a cellulose triacetate film to both surfaces of a polarizing film via an adhesive layer, an adhesive side surface of a plastic film used for melt-adhering the polarizing sheet and lens molding resin, with the polarizing sheet, or the cellulose triacetate film surface of the polarizing sheet after adhering and laminating the polarizing sheet and the plastic sheet; a laminate sheet obtained by using the raw material colored by the respective means is thermally bent into an object shape such that the polarizing sheet side becomes an outer surface and the plastic film side becomes an inner surface; the thermally bent sheet is inserted to a forming mold; and lens molding resin material which is melt-adhered to the plastic film is injection-molded on the plastic film side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical laminated molded product that can meet various demands by economically coloring polarized optical lenses used as lenses for correction glasses, sunglasses, goggles and the like into various colors. More specifically, an optical laminated molded product is obtained by printing on the surface of the polarizing film used before the lamination molding using a transparent ink made of a transparent colorant to a desired color and density, and using the colored polarizing film. It is characterized by obtaining.

  In recent years, in the eyeglass lens market, there has been a demand for lenses that protect the eyes and are gentle on the eyes. In particular, glass lenses have heretofore been the mainstream, but plastic lenses have become the mainstream in order to protect eyes from accidents due to lens damage, and plastic materials have also changed to materials that are not easily damaged.

  On the other hand, the performance required of the lens itself is also high refractive index, thin and light, cuts off ultraviolet rays and imparts polarization performance to block light rays harmful to the eyes, and to the surrounding brightness In response, there is a demand for a lens that can change the color and light transmittance of the lens.

  However, in recent years, there has been a demand for increasing the added value by diversifying the color of the lens and adding various shades to the lens color in addition to its functions.

  Lenses having a high refractive index and a thin function are generally studied for improvement by a method of casting a monomer containing sulfur or the like in the molecule. On the other hand, in order to block harmful rays such as ultraviolet rays, an ultraviolet absorber or the like is blended with a plastic material of a lens material. In addition, in order to shield the glare of the eyes, an absorber with a specific wavelength is blended into the lens molding material, in addition, a secondary processing is applied to the lens surface, and a film having polarization performance is also provided. It is realized by putting it in the lens. In addition, changing the color and light transmittance of a lens in response to ambient brightness is realized by blending a photochromic compound that changes its color and density in response to ultraviolet light into the lens material and paint to be processed on the surface. ing.

  On the other hand, coloring of a general sunglasses lens or the like is performed mainly by coloring a molded resin or by dyeing a molded lens. However, it is very difficult to deal with dyeing and coloring at the time of dyeing, there are many variations in color from lens to lens, and there are many problems such as lens color deterioration due to the weather resistance of the dye used for dyeing.

  However, in the case of the polarizing optical lens targeted by the present invention, conventionally, most of the color coloring is handled by coloring a film having polarization performance, and it is very difficult to deal with a small lot.

  Other than the above, as described in the patent No. 3681325 of the present inventor, a polarizing film having a high light transmittance and a high degree of polarization is used, and coloring can be handled by coloring the resin used for molding. It is. However, this coloring method is effective when the lens is fixed to a frame as it is, such as a sunglasses lens or a sports goggles lens, but the inner surface of the lens is polished like a correction lens. Depending on the power of the eye, in this case, the thickness varies depending on the part of the lens due to polishing, which causes color shading in one lens, which is unsuitable for use.

In many cases, the upper half of the lens is used in a shaded half color (gradation) with a shaded surface color, and this is generally handled by staining the lens. However, coloring by dyeing requires uniform management of the dyeing, and therefore high-quality lens dyeing is very expensive.
Japanese Patent Publication No.53-29711 Japanese Patent Publication No. 50-3656 Shoko 61-56090 7-94154 Japanese Patent No. 3681325 "Transparent resin that has come to here" by Fumio Ide (published by the Industrial Research Council) "The story of color and coloring", Yoshihiro Shigemori (published by Nikkan Kogyo Shimbun)

  The most important issue is to economically produce an optical lens having uniform quality with various color tones and various patterns at the same time while having polarization performance by the injection molding method.

  In the conventional technology, the polarization performance is achieved by manufacturing a polarizing sheet using a dye having a polarization performance suitable for the target color tone, and molding using that sheet. In order to achieve this, it is necessary to prepare a sheet with a large number of colors, and there are many problems in terms of economy, and depending on the color tone, a lens having a high degree of polarization cannot be obtained. Further, even if the lens is molded and dyed with a dyeing method, there are many defects due to variations in color tone due to dyeing and unevenness of dyeing, which also has a problem in terms of economy because it reduces the yield.

  The present invention has been obtained as a result of intensive studies to solve the above-mentioned problems. However, as a laminated molded product having polarization, the present inventors have already obtained Japanese Patent No. 3681325. Is. That is, a transparent ink made of a transparent colorant on the cellulose triacetate film surface on one side, based on a polarizing film having a high light transmittance and a high degree of polarization, which is used for liquid crystal displays whose production and applications have been expanded in recent years. In the laminated sheet obtained by applying color printing and bonding the plastic film to be fused with the molding resin used for lens molding on the printed surface or the other surface via an adhesive, or one of the polarizing sheets Laminate sheet obtained by printing the cellulose triacetate surface and the plastic film via an adhesive and then printing on the other cellulose triacetate film surface, or the surface on which the plastic film to be bonded to the polarizing sheet is bonded A transparent ink made of a transparent colorant is printed on this surface, and this surface is polarized with an adhesive. A lens that is laminated with the cellulose triacetate film surface of the sheet, the laminated sheet is molded into a shape close to the outer form of the object to be molded, and is inserted into a mold, and the lens is fused to the plastic film on the plastic film side. The present invention has been completed by injection molding of a molding resin material.

  According to the first aspect of the present invention, the color of the polarizing sheet obtained by sticking the cellulose triacetate film on both surfaces of the polarizing film with an adhesive is transparent using a transparent ink made of a transparent colorant. Printing is performed, and a laminated sheet is obtained by laminating a plastic film having a total light transmittance of 80% or more and a thickness of 0.1 to 0.3 mm on the printed surface using an adhesive, and then the laminated sheet is formed into a molding object. The sheet is molded by hot bending so that the cellulose triacetate film of the sheet becomes the outer surface, and is inserted into a mold, and the film is fused to the inner plastic film side. It is an optical laminated molded product having polarization performance, which is obtained by injection molding a lens molding resin material.

  In the second aspect of the invention, color printing is performed on one cellulose triacetate film surface of the polarizing sheet having the same configuration as that used in the first aspect of the invention with a transparent ink made of a transparent colorant. Optical lamination molding using a laminated sheet obtained by attaching a plastic film having a light transmittance of 80% or more and a thickness of 0.1 to 0.3 mm to the cellulose triacetate film surface opposite to the surface through an adhesive. It is characterized by obtaining goods.

  The invention according to claim 3 has a total light transmittance of 80% or more and a thickness of 0.1 to 0 on one cellulose triacetate cloth film surface of the polarizing sheet having the same structure as that used in the invention of claim 1 above. To obtain an optical laminated molded article using a laminated sheet obtained by laminating a 3 mm plastic film with an adhesive and color-printing the other cellulose triacetate film surface with a transparent ink made of a transparent colorant It is characterized by.

  In the invention according to claim 4, color printing is performed with a transparent ink made of a transparent colorant on one side of a plastic film having a total light transmittance of 80% or more and a thickness of 0.1 to 0.3 mm. A laminated sheet is obtained by laminating a color printing surface and a polarizing sheet obtained by adhering a cellulose triacetate film via an adhesive on both sides of a polarizing film to obtain a laminated sheet, and then using this laminated sheet for optical A laminated molded product is obtained.

  According to the optical laminate molded product obtained in the above-mentioned claim of the present invention, the polarizing film is characterized by the high polarization property, and further, the surface thereof is printed uniformly using a transparent ink made of a transparent colorant. It is possible to economically obtain a laminated molded sheet that can deal with light and shade, color tone, and pattern in a small lot. This laminated molded sheet is thermoformed into the desired shape, inserted into an injection mold, and optical lens resin is injection molded to be used in prescription lenses, sunglasses lenses, sports goggles, etc. that have polarization performance It came to obtain the laminated molding product which can be performed.

  The polarizing sheet that can be used in the present invention includes a polarizing film produced by dyeing and stretching a polyvinyl alcohol film generally used as a base film with a dichroic dye having heat-and-moisture resistance, and the polarizing film. A polarizing sheet composed of a cellulose triacetate film having optically excellent transparency on both sides and bonded using an adhesive, having a thickness of 1 mm or less, a degree of polarization of 95% or more, and a total light transmittance of 30. % Or more can be used. In this case, if the thickness of the polarizing sheet is 1 mm or more, the flow of the molding resin in the molding die is poor in molding a sunglasses lens having a thickness of 2 mm, and a large distortion occurs. Also, those having a polarization degree of 95% or less cannot be used because they are not subject to authorization as polarizing lenses.

  In addition, as a plastic film having a total light transmittance of 80% or more and a thickness of 0.1 to 0.3 mm laminated on one cellulose triacetate film surface of the polarizing sheet as described above, a polyester resin film or a polycarbonate resin film is used. Resin films, polyarylate resin films, polyamide resin films, polyolefin resin films, cellulose resin films, polyurethane resin films and the like can be used. If the thickness of the film in this case is 0.3 mm or more, the film and the polarizing sheet are bonded together and then subjected to heat bending molding. At this time, molecular distortion tends to occur in the film, resulting in optical If the performance is impaired and further the distortion is to be eliminated, the time required for the thermal bending becomes longer, and the economic efficiency during the production is impaired. In addition, when the thickness is 0.1 mm or less, it is not preferable because the polarizing sheet outside is destroyed through the film by the heat and pressure at the time of molding the lens molding resin and the shearing force due to the resin flow in the mold.

  In the present invention, the adhesive used for bonding and bonding the film and the sheet or the films is a moisture curable polyurethane type, a thermosetting polyisocyanate polyester urethane type, a polyisocyanate polyether polyether type, a polyisocyanate. -Adhesives such as polyacrylic, photocurable polyurethane, and polyurethane-acrylate can be used.

  As an ink that can be used as a transparent ink comprising a transparent colorant used in the present invention, a dye generally used for plastic films, an organic pigment, a colorant obtained by atomizing a normal pigment into a polyurethane, a rosin epoxy, A transparent ink blended in an ink vehicle such as rosin urethane, acrylate, epoxy acrylate, or urethane acrylate can be used.

  In addition, as a printing method for performing color printing with transparent ink, a commonly used printing method can be used. For example, gravure printing, offset printing, screen printing, letterpress printing, pad printing, inkjet printing, and the like can be used.

  The lens molding resin material is selected from polycarbonate resin, polyacrylic resin, polyamide resin, polyester resin, polyarylate resin, cellulose resin, polyurethane resin, polyolefin resin, etc. Use it.

  The optical laminated molded product of the present invention thus obtained can be used as a polarizing lens, a sunglasses lens, sports goggles, and a correcting spectacle lens.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples.

  By adhering a 0.08 mm thick cellulose triacetate film to both sides of a 0.03 mm thick polarizing film made of polyvinyl alcohol having a polarization degree of 99.9% and a light transmittance of 45% using an iodine dye. Using the obtained polarizing sheet having a thickness of 0.19 mm (manufactured by Sumitomo Chemical Co., Ltd., trade name Sumikaran), the concentration was adjusted so that the total light transmittance was 18% on one cellulose triacetate film surface of this polarizing sheet. Gray ink is printed on a gravure printing machine, and a polycarbonate resin film with a total light transmittance of 89% and a thickness of 0.18mm is attached to the printed surface. Adhesive lamination was performed using an agent.

  The laminated sheet is heat-bended so that the cellulose triacetate film side is convex and the polycarbonate resin film side is concave, and this is mounted in an injection mold, and an optical polycarbonate resin is injection-molded on the polycarbonate resin film side. Thus, a polarizing lens having a thickness of 2.0 mm was obtained. When the polarizing lens configured as described above is used as spectacles, the cellulose triacetate film is on the outermost side, and the polycarbonate resin film is on the innermost eyeball side.

  The obtained lens had a total light transmittance of 15%.

  On one cellulose triacetate film surface of the same polarizing sheet as in Example 1, printing was performed using a relief printing machine with a transparent ink colored in brown color whose concentration was adjusted so that the total light transmittance was 20%. A polyurethane resin film having a total light transmittance of 90% was adhered and laminated on the other cellulose triacetate surface using an ultraviolet curable polyurethane adhesive.

  The laminated sheet is heat-bent so that the printed surface is convex and the polyurethane resin film surface is concave, and this is mounted in an injection mold, and polyurethane resin is injection-molded on the polyurethane resin film side to obtain a thickness of 2 A 0.0 mm brown polarizing lens was obtained.

  The obtained lens had a total light transmittance of 18%.

  Two-component curable adhesive of two-component curable polyisocyanate-polyether polyurethane with a polycarbonate resin film having a total light transmittance of 89% and a thickness of 0.25 mm on one cellulose triacetate film surface for the same polarizing sheet as in Example 1. Adhesive lamination was performed using an agent. The laminated sheet was obtained by printing on the surface of the cellulose triacetate film of the laminated sheet with a gravure printing machine using a transparent ink colored in a copper color whose concentration was adjusted so that the total light transmittance of the laminated sheet was 28%.

  The laminated sheet was injection-molded with a polycarbonate resin in the same manner as in Example 1 to obtain a 2.0 mm thick copper polarized lens.

  The obtained lens had a total light transmittance of 25%.

  Printed on a gravure printing machine with a transparent ink colored in gray so that the total light transmittance after printing is 50% on one side of a polycarbonate film having a thickness of 0.25 mm and a total light transmittance of 89%, Lamination is performed by laminating a polarizing sheet having a degree of polarization of 99%, a light transmittance of 40%, and a thickness of 0.2 mm on this printed surface using a UV curable polyurethane adhesive. A sheet was obtained.

  The laminated sheet was injection-molded with polycarbonate resin in the same manner as in Example 1 to obtain a gray polarized lens having a thickness of 2.0 mm.

  The obtained lens had a total light transmittance of 18%.

Claims (5)

  Color printing is performed on one of the cellulose triacetate film surfaces of the polarizing sheet obtained by sticking a cellulose triacetate film on both surfaces of the polarizing film with an adhesive, and a transparent ink made of a transparent colorant. A plastic film having a transmittance of 80% or more and a thickness of 0.1 to 0.3 mm is laminated using an adhesive to obtain a laminated sheet, and this laminated sheet is then shaped into a shape close to the outer form of the object to be molded. Molded by thermal bending so that the cellulose triacetate film is on the outer surface, inserted into a mold, and injection molded a resin material for lens molding that is fused to the film on the inner plastic film side. An optical laminated molded product having polarizing performance, characterized in that it is obtained.   A polarizing sheet obtained by sticking a cellulose triacetate film on both sides of a polarizing film with an adhesive is subjected to color printing with a transparent ink made of a transparent colorant on one side of the cellulose triacetate film, and the other side of the cellulose triacetate. A laminated sheet is obtained by laminating a plastic film having a total light transmittance of 80% or more and a thickness of 0.1 to 0.3 mm on the film surface using an adhesive, and then this laminated sheet is close to the outer form of the molding object. A lens molding resin material that is molded by hot bending so that the color printing surface of the sheet is the outer surface, inserted into a mold, and fused to the inner plastic film side An optical laminated molded article having polarization performance obtained by injection molding.   A plastic film having a total light transmittance of 80% or more and a thickness of 0.1 to 0.3 mm on one cellulose triacetate film surface of a polarizing sheet obtained by adhering a cellulose triacetate film to both surfaces of the polarizing film via an adhesive. Is laminated with an adhesive, and the other cellulose triacetate film surface is subjected to color printing with a transparent ink made of a transparent colorant to obtain a laminated color sheet, and then this laminated color sheet is formed into an outer form of a molding object. A lens molding resin that is molded by hot bending so that the color printing surface of the sheet is on the outside in a close shape, inserted into a mold, and fused to the film on the inner plastic film side An optical laminated molded product having polarization performance obtained by injection molding a material.   One side of a plastic film having a total light transmittance of 80% or more and a thickness of 0.1 to 0.3 mm is subjected to color printing with a transparent ink made of a transparent colorant. The color printing side of this plastic film and both sides of the polarizing film A polarizing sheet obtained by adhering a cellulose triacetate film to an adhesive is laminated with an adhesive to obtain a laminated sheet, and then the laminated sheet is shaped into a shape close to the outer form of the molding object. Molded by thermal bending so that one of the cellulose triacetate film surfaces becomes the outer surface, inserted into a mold, and a lens molding resin material fused to the film on the inner plastic film side An optical laminated molded product having polarization performance, which is obtained by injection molding.   The polarizing sheet is characterized by having a thickness of 1 mm or less obtained by sticking a cellulose triacetate film on both surfaces of a polarizing film having a degree of polarization of 95% or more and a total light transmittance of 30% or more. .