JP2634435B2 - Dyeing method of oxygen-permeable hard contact lens and dyed oxygen-permeable hard contact lens - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a technique for dyeing an oxygen-permeable hard contact lens (hereinafter, referred to as HCL), and is particularly applied to marking and partial coloring of the HCL. Technology.

(Background Art) Conventionally, a contact lens has been used for the purpose of distinguishing between front and back surfaces and distinguishing between left and right lenses, as well as specifying the standard of the lens and facilitating sorting and organizing. A desired mark such as a symbol is provided (marked) by coloring or the like. In recent years, due to fashion demands, contact lenses have been colored for the purpose of preventing glare, making it easier to find when dropped, improving the product image, and the like. In this way, the contact lenses are marked or partially colored for various purposes.

By the way, contact lenses are roughly classified into “soft contact lenses (hereinafter referred to as“ SCL ”)” and “hard contact lenses (HC)
L) "is known. SCL is made of a polymer obtained by using a large amount of a hydrophilic monomer such as hydroxyethyl methacrylate as a main component as a material, and the lens itself is a soft lens showing a large water content. For this reason, since this type of lens is water-containing, it is easy to penetrate the dye into the lens, and various lens marking methods and the like have been conventionally considered.

On the other hand, since HCL is a relatively hard lens with almost no water content of the lens itself, when performing marking or the like, the dye penetrates into the lens material like the above-mentioned water-containing SCL. It is extremely difficult to make the lens marking method and the like of SCL difficult to apply as it is. For this reason, in order to perform marking on the HCL, for example, (a) a method of engraving the lens surface with a diamond needle or the like, or a method of substantially engraving by irradiating a laser to the lens surface, (B) A method of performing marking by imprinting the lens with a stamp method using immortal ink or the like, and (c) a marking method by a transfer method (octopus printing) using a pad printer ( JP-A-62-288812
Publication No.) is adopted.

However, in the method (a) based on the above-described marking, since the marking is performed by scraping the surface of the HCL, the lens is inevitably damaged because the lens thickness is reduced by the marking. There is also a problem that dirt such as eye grease adheres to the marking portion, which has a problem of adversely affecting the eyes.

In the marking method (b) by imprinting,
Because it is stamped, it is difficult to apply a certain level of marking,
In addition, if the method of applying pressure such as imprinting is biased, there is a disadvantage that marked characters and symbols become unclear or misaligned, and in addition, the use of a lens causes the marking portion to gradually disappear. There was a disadvantage.

Furthermore, in the marking method (c) by the octopus printing, since the octopus printing is used, the marked portion is in a state of being raised and adhered to the lens surface. In particular, for the oxygen-permeable HCL described below, Siloxanyl methacrylate, fluoromethacrylate, etc. are used as lens components.Since the adhesiveness of the ink is relatively poor, foreign-body sensation may occur when worn on the eyes, However, there is a problem that the marking may be attached to the raised portion, and the marking is relatively peeled off and easily dropped.

(Problem to be Solved) Here, the present invention has been made in view of the above circumstances, and the problem to be solved is that there is no swelling of the stained portion on the lens surface and the necessity of sharpening the lens. An object of the present invention is to realize uniform and strong dyeing of the oxygen-permeable HCL, which does not cause breakage or the like, and which is uniform.

(Solution) In order to solve the above-mentioned problems, the present invention provides a transfer method using a sublimable dye, which comprises a polymer material obtained by copolymerizing siloxanyl methacrylate or acrylate or fluoromethacrylate or acrylate as a main component. The sublimable dye is applied to the surface of a site to be dyed of the obtained oxygen-permeable hard contact lens, and the dye is sublimated and penetrated from the oxygen-permeable contact lens surface by heating. The gist is a method for dyeing an oxygen-permeable hard contact lens.

In addition, the present invention is applied to the surface of a site to be dyed of an oxygen-permeable hard contact lens obtained from a polymer material obtained by copolymerizing siloxanyl methacrylate or acrylate or fluoromethacrylate or acrylate as a main component. The gist of the present invention is also an oxygen-permeable hard contact lens in which a sublimable dye is sublimated and infiltrated from a lens surface by heating to dye a desired portion of the lens.

By the way, the oxygen-permeable HCL which is the object of the present invention is copolymerized with siloxanyl methacrylate or acrylate or fluoromethacrylate or acrylate as a main component, which has recently been used very frequently as a lens component. Oxygen permeable HCL obtained from a polymer material is used. In particular, since the oxygen-permeable HCL has a larger molecular gap of the copolymer than the HCL mainly containing ordinary polymethyl methacrylate or the like, the sublimable dye used in the present invention is relatively easily used. It is preferably used to penetrate into the lens.

The present invention sublimates and penetrates such a predetermined oxygen-permeable HCL from the lens surface by a transfer method using a predetermined sublimable dye, thereby dyeing for the purpose of marking or the like. To be implemented,
More specifically, it is performed as follows.

That is, first, a predetermined sublimable dye and a binder (for example, ethyl cellulose, hydroxyethyl cellulose, polyamide resin, polymethyl methacrylate resin, polyvinyl acetate resin, silicon resin, etc.) are formed on one side of a base film made of a polyester film, capacitor paper or the like.
An ink sheet coated with an ink layer made of is prepared, and is arranged so as to be in close contact with the outer surface or the inner surface of the oxygen-permeable HCL. In this case, the ink sheet is preferably arranged on the outer surface of the lens where the working conditions are easy. That is, as shown in FIG. 1, the ink sheet 6 is placed on the convex outer surface of the oxygen-permeable HCL 4 attached to the jig 2. In the ink sheet 6, an ink layer 6b is coated with a predetermined thickness on one surface of a base film 6a.
Then, a heating medium 8 having a letterpress mold of a desired design attached to the tip is pressed against the opposite surface (the surface on which the ink layer is not formed) of the ink sheet 6 and heated, whereby the sublimable dye is removed from the surface of the HCL 4. Is allowed to sublimate and penetrate into the HCL 4 from the ink sheet 6 to obtain an HCL in which a target portion is colored or marked.

However, in the present invention, the ink sheet 6 as described above is used.
In addition to a system in which the transfer is performed by partially heating the heating medium 8 with a heating medium 8, various known transfer systems can be adopted. For example, as shown in FIG. Using an ink mark sheet 12 having an ink layer 10 only in the base film 16 site corresponding to the site to be dyed of the HCL4, the ink mark sheet 12 is arranged on the HCL4, and heated by a heating medium 14, Such ink layer 10
Even if the sublimable dye is sublimated and penetrated into HCL4, it is possible to stain a predetermined portion of the target HCL4, and further, using a laser beam as a heat source, the laser beam is used to form an ink layer such as an ink sheet. A method in which a sublimable dye is sublimated and penetrated into oxygen-permeable HCL can be appropriately employed.

Further, as described above, the sublimable dye that is sublimated and penetrated into the oxygen-permeable HCL according to the present invention is basically a dye having a property of sublimating by heat, transferring into the HCL, and fixing. If it is anything,
For example, the dye is appropriately selected from disperse dyes, oil-soluble dyes, basic dyes, cationic dyes, vat dyes, and the like. In general, dyes having low-temperature sublimability are suitably used.

Further, among such sublimable dyes, basic dyes are preferably used from the viewpoint of fixing power and the like. For example, when oxygen-permeable HCL is the target, in order to impart hydrophilicity to the lens, a hydrophilic monomer having an acidic group such as methacrylic acid has recently been included as an effective amount as a lens component in order to impart hydrophilicity to the lens. From the place where there are many, in that case, by the reaction of the above-mentioned basic dye with methacrylic acid or the like which is the acidic monomer in the lens, the dye is chemically bonded to the lens component, so that the dye Elution can be prevented more than others, and it can be used particularly preferably.

Incidentally, if the sublimable dye used in the present invention is exemplified, CIdisperse Blue 56, CIDisperse
perse Violet 1, CIDisperse Red 11, CIDisperse Re
d 60, CIDisperse Orange 3, CIDisperse Yellow 56
And oil-soluble dyes such as CISolvent Blue 10
5, CISolvent Violet 13, etc., and as vat dyes, CIVat Blue 1, CIVat Blue 3, CIVat Blue
5, CIVat Blue 6, CIVat Green 3, CIVat Red 1, etc., and basic dyes such as 4- (4'-dimethylaminophenyl) pyridine, 1'-methyl-3 ', 3'
-Dimethyl-7-diethylaminospiro [2H-1-benzopyran-2,2'-indoline], 3,7-bis- (diethylamino) -10-ethoxy-phenoxazine and the like.

(Examples) Hereinafter, some examples of the present invention will be shown to clarify the present invention more specifically. However, the present invention imposes some restrictions by the description of such examples. It goes without saying that you don't receive anything.

It should be noted that, in addition to the following examples, the present invention may be variously modified, modified, and improved based on the knowledge of those skilled in the art, in addition to the above-described specific description, without departing from the spirit of the present invention. It is to be understood that such may be added.

Example 1 While an oxygen-permeable hard contact lens “Menicon EX” (manufactured by Menicon) was used as HCL4, a sublimable dye, CISolv, was used as the ink sheet 6.
Using an ink sheet for sublimation transfer coated with an ink composed of ent Violet 13 and a binder component, as shown in FIG. 1, the HCL4 is adhered and fixed to the jig 2 and then the ink is applied to the outer surface of the HCL4. The sheet 6 is brought into close contact, and a letterpress type heating medium 8 of a desired design is pressed thereon and heated at 100 ° C. for 5 seconds. On the outer surface side of the HCL4, the partial color dyeing is sharply performed according to the letterpress design. Was realized.

The obtained color lens was sufficiently usable without decoloring even when subjected to a heat treatment at 70 ° C. × 24 hours.

Example 2 While an oxygen-permeable hard contact lens “MENICON EX” (manufactured by Menicon) was used as HCL4, the ink mark sheet 12 was a sublimable dye 3,
FIG. 2 shows an ink mark sheet for sublimation transfer printed in a mark of a desired design using an ink composed of 7-bis- (diethylamino) -10-ethoxy-phenoxazine (basic dye) and a binder component. As shown, after bonding and fixing such HCL4 on the jig 2,
The ink mark sheet 12 is adhered to the HCL 4 at 150 ° C.
When the heating medium 14 was pressed against and heated for 5 seconds, the ink mark sheet 12 was designed as
HCL4 was clearly transferred and stained.

The lens obtained in this manner is used as a lens cleaning solution “O ₂
Even after repeated "rubbing" with fingers using "Care" (manufactured by Menicon Co., Ltd.), there was no change and the dyeing was clear. In addition, for the obtained color lens, 70
Even after heat treatment at ℃ x 24 hours, without decolorization,
It was usable enough.

Example 3 CIVat Blue 6 (bat dye) as a sublimable dye and a binder component were provided on the outer surface side of an oxygen-permeable hard contact lens “Menicon O ₂ -32” (manufactured by Menicon) bonded and fixed to a jig. The ink sheet for sublimation transfer coated with the following ink was brought into close contact with the ink sheet, and the ink sheet was irradiated with laser light through a mark-shaped mask of a predetermined standard design. As a result, the hard contact lens was clearly marked.

Example 4 CIdisperse 56 (dispersible dye) as a sublimable dye and a binder component were provided on the outer surface side of an oxygen-permeable hard contact lens “MENICON O ₂ -32” (manufactured by Menicon) bonded and fixed to a jig. The ink mark sheet (12) coated with the following ink is adhered to the ink mark sheet (12).
When the mark was irradiated and heated for 5 seconds, the hard contact lens was clearly marked.

(Effect of the Invention) As is clear from the above description, according to the present invention, the dye penetrates into the oxygen-permeable HCL by sublimation,
There is no swelling of the dyed part on the lens surface, and it is possible to carry out dyeing such as uniform and strong marking in an extremely large amount.Because it is not an engraving method, there is virtually no need to sharpen the lens, so It is not possible to cause damage or the like. In particular, oxygen-permeable HCL enables extremely stable staining.

Further, according to the present invention, markings in which a lens standard, a lens name, a trademark of a manufacturer, and the like are described can be effectively performed on oxygen-permeable HCL. The present invention can also be used for color conversion and the like.

[Brief description of the drawings]

1 and 2 are explanatory views showing different examples of the transfer method used in the present invention. 2: Jig 4: Hard contact lens 6: Ink sheet 6a, 16: Base film 6b, 10: Ink layer 8, 14: Heating medium 12: Ink mark sheet

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-87377 (JP, A) JP-A-58-111017 (JP, A) JP-A-62-288812 (JP, A) JP-A-62-288812 5841 (JP, A)

Claims (2)

(57) [Claims] An oxygen-permeable hard contact lens obtained from a polymer material obtained by copolymerizing siloxanyl methacrylate or acrylate or fluoromethacrylate or acrylate as a main component is dyed by a transfer technique using a sublimable dye. On the surface of the part to be
A method for dyeing an oxygen-permeable hard contact lens, comprising applying the sublimable dye and sublimating the dye from the surface of the oxygen-permeable contact lens by heating. 2. Sublimation applied to the surface of a site to be dyed of an oxygen-permeable hard contact lens obtained from a polymer material obtained by copolymerizing siloxanyl methacrylate or acrylate or fluoromethacrylate or acrylate as a main component. An oxygen-permeable hard contact lens in which a dye is sublimated and penetrated from the lens surface by heating to dye a desired portion of the lens.