JP2004347660A - Rubbing method for spectacle lens with oil repellent coating, manufacturing method for spectacle lens with oil repellent coating, and tape with pressure sensitive adhesive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for rubbing even a lens to which oil repellent coating is applied without causing axial deviation. <P>SOLUTION: An adhesive tape 2 is stuck (a) to both sides of the lens to be worked 1 before setting the lens 1 in a lens rubbing machine. The tape 2 consists of a tape with a pressure sensitive adhesive obtained by coating the surface of a polymer film which has such transparency that light transmittance is ≥80%, whose thickness is 10 to 100μm and whose Young's modulus is ≥1Gpa with a pressure sensitive adhesive, and is stuck by pressing the pressure sensitive adhesive side to the surface of the lens 1. The lens 1 is fixed on a lock cap 3 by a double coated adhesive tape 4 as shown by (b) similarly to the conventional technique. Then, the lock cap 3 is fixed on an upside lens working shaft 5. Next, the lens 1 is held and fixed between a downside lens working shaft 6 and the lock cap 3. The outer periphery of the lens 1 is worked by a grinding tool in such a state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【００４１】
表１から、シリコン系粘着剤付テープをレンズの表面に貼り付けた本発明の実施例においては、軸ずれは１°以下であり、仕上がりも良好であった。これに対し、シリコン系粘着剤付テープを用いなかった比較例においては、軸ずれが２°を超え、かつ仕上がりも良好でなかった。
【００４２】
【発明の効果】
以上説明したように、本発明によれば、レンズ表面の少なくとも一方に撥油コートが施されているレンズでも、軸ずれを起こさないで玉摺加工を行う方法、この玉摺加工を中間工程として含むレンズの製造方法、及びこの玉摺加工に使用する粘着剤付テープを提供することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の例である撥油コート付き眼鏡レンズの玉摺加工方法の概念を説明するための図である。
【図２】本発明の実施の形態である玉摺加工方法に用いるのに好適な接着テープの平面形状を示す図である。
【図３】従来の眼鏡レンズの玉摺加工方法の概念を説明するための図である。
【符号の説明】
１…被加工レンズ、２…接着テープ、３…ロックキャップ、４…両面接着テープ、５…上側レンズ加工軸、６…下側レンズ加工軸、７…穴、８…ポリエステルフィルム、９…粘着剤、１０…パッド部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of processing a ball for processing an outer shape (outer periphery) of an eyeglass lens provided with an oil-repellent coat so as to fit an eyeglass frame, and a tape with an adhesive used in the method of processing the ball. is there.
[0002]
[Prior art]
Generally, a spectacle lens is processed into an external shape so as to conform to a shape of a spectacle frame selected by a customer at a retail store, and is then provided to the customer in the spectacle frame. Such a processing machine for processing the outer periphery of a lens is called a ball processing machine (edger, outer edge processing machine, etc.). In a general ball milling machine, an outer shape is processed by grinding an outer edge with a grinding tool while holding eyeglasses by a processing shaft.
[0003]
FIG. 3 shows a conceptual diagram of the processing method. First, the lens to be processed 21 is fixed to a lock cap 22 made of plastic with a double-sided adhesive tape 23. That is, the double-sided adhesive tape 23 is attached to the lock cap 22 in advance, and the other surface is attached to the surface of the lens 21 to fix the lens 21 to the lock cap 22. Then, the lock cap 22 is fixed to the upper lens processing shaft 24.
[0004]
Next, the lens to be processed 21 is sandwiched and fixed between the lower lens processing shaft 25 and the lock cap 22. In this state, the grinding tool 26 is moved along the outer periphery of the lens 21 while rotating, and the outer periphery of the lens 21 is processed. Such a ball processing may be performed at a manufacturer's factory instead of at a retail store.
[0005]
[Problems to be solved by the invention]
In general, the surface of the lens is coated with a primer to prevent cracking due to impact, a hard coat to prevent damage, an antireflection coat to prevent reflection and increase transmittance, a water-repellent coat to provide water repellency, etc. Are applied, but these coats do not affect the above-mentioned glazing process.
[0006]
However, since about 2002, spectacle lenses in which the surface of the spectacle lens is coated with an oil repellent have been sold. Such a lens is popular among spectacle users because the surface does not easily become dirty, but due to the low frictional resistance of the surface, when using the lens holding method as described above, processing is not possible. However, there is a problem that the lens processing axis deviates from the axis of the lens, and a problem arises in that the external shape processing cannot be performed accurately. For this reason, a method of fixing the lens to be processed by a method other than the above-described method to prevent the axial deviation has been attempted.
[0007]
However, even if any of the methods can prevent the axial misalignment, there is a problem that side effects on the product lens itself such as scratches on the lens surface during processing, peeling of various coating films, and cracks in the lens substrate occur. was there. Also, processing is performed by reducing the lens cutting speed of the ball milling machine, but in this case, there is a problem that the cutting time becomes extremely long.
[0008]
The present invention has been made in view of such circumstances, and even in a lens having an oil-repellent coating, a method of performing ball-sliding without causing axial misalignment, and a lens including the ball-sliding as an intermediate step. It is an object of the present invention to provide a manufacturing method and a tape with an adhesive used for this ball processing.
[0009]
[Means for Solving the Problems]
A first means for solving the above-mentioned problem is a ball-sliding method in which an oil-repellent coated lens is ball-slid into various types by a ball-sliding machine. A step of attaching a tape with an adhesive coated with a silicone-based adhesive to the surface of a polymer film having a thickness of 10 to 100 μm and a Young's modulus of 1 Gpa or more, and then setting the tape on the glazing machine; A method of processing a ball of a spectacle lens with an oil-repellent coat, characterized in that:
[0010]
In this means, a tape with an adhesive in which a silicone-based adhesive is coated on the surface of a polymer film having a thickness of 10 to 100 μm and a Young's modulus of 1 Gpa or more is attached to both surfaces of the lens to be processed in advance, After that, there is a step of setting the ball milling machine. The oil-repellent coat is formed by coating the surface of the lens with a fluorine-based resin film, but the silicone-based adhesive has a higher adhesive strength to this fluorine-based resin film than other adhesives. Therefore, the adhesive tape adheres to the oil-repellent coated lens without slippage. Then, in the same manner as in the conventional method, the lock cap with the double-sided tape is stuck to the polymer film side of the adhesive tape and fixed to the lock cap. Thereby, it is possible to perform the ball-sliding processing while preventing the axial deviation.
[0011]
According to this means, since the size of the adhesive tape can be made larger than the size of the lock cap, it is possible to obtain a sufficient adhesive strength. If the thickness of the polymer film is less than 10 μm, the strength is weakened, and the effect of preventing axial misalignment is reduced. On the other hand, if the thickness of the polymer film exceeds 100 μm, the film will have poor copying properties, and it will be difficult to adhere closely to a lens to be processed having a curved surface. On the other hand, if the Young's modulus is less than 1 Gpa, the axial displacement may increase due to elastic deformation. As the polymer film, it is particularly preferable to use a polyester film in consideration of strength and the like.
[0012]
A second means for solving the above-mentioned problem is the first means, wherein the light transmittance of the polymer film is 80% or more (Claim 2).
[0013]
When performing ball processing automatically, a method of detecting the position of the lens to be processed by transmitting light to the lens to be processed is adopted. In such a case, if the light transmittance of the attached polymer film is poor, the position measurement system of the lens to be processed does not work well. Therefore, the light transmittance of the polymer film is preferably 80% or more.
[0014]
A third means for solving the problem is the first means or the second means, wherein the shape of the adhesive tape is a circle or an ellipse having a hole in the center, and Wherein the major axis is 30 mm to 60 mm, the minor axis is 20 mm to 40 mm, and the diameter of the circle inscribed in the central hole is 3 to 15 mm (Claim 3).
[0015]
As described above, in the first means and the second means, a particularly large adhesive force can be obtained by making the size of the tape with an adhesive larger than the size of the lock cap. When the major axis of the ellipse is less than 30 mm or the minor axis of the ellipse is less than 20 mm, sufficient adhesive strength may not be obtained. Therefore, it is preferable that the major axis and the minor axis be larger.
[0016]
On the other hand, if it is too large, it may be cut off together with the lens during processing, and may be peeled off. In addition, when the shape is large, the fitting property with the curved surface of the lens to be processed deteriorates. Therefore, it is preferable that the major axis of the ellipse is 60 mm or less and the minor axis is 40 mm or less. In this means, when the shape of the tape with an adhesive is a circle, it is considered that the size of the tape is the same as the major axis and the minor axis of the ellipse. Therefore, the outer diameter of the circle is 30 to 40 mm.
[0017]
The reason why the hole is provided in the center is to improve the fitting property with the curved surface of the lens to be processed and to prevent wrinkles. For such a purpose, the diameter of the circle inscribed in this hole is preferably 3 to 15 mm. In particular, it is preferable that the shape of the hole is a circle or an ellipse close to a circle.
[0018]
A fourth means for solving the above-mentioned problem is any one of the first means to the third means, wherein an adhesive is coated on the surface of the polymer film at an end of the adhesive tape. A pad portion not provided is provided (claim 4).
[0019]
Since the pad portion is made of a material having no adhesive property to the adhesive, this portion is not coated with the adhesive when the tape with the adhesive is produced. Therefore, after the end of the ball-sliding process, it is easy to peel off the adhesive tape from this portion as a base point.
[0020]
A fifth means for solving the above-mentioned problem is the fourth means, wherein the width of the pad portion is 1 to 5 mm (Claim 5).
[0021]
When the width of the pad portion is less than 1 mm, the workability is poor because the pad portion is too narrow when used as a base point for peeling off the adhesive tape. If the width is more than 5 mm, it is likely to come into contact with the part of the ball milling machine during the ball milling process or to be easily peeled off for other reasons. Therefore, the width of the pad portion is preferably 1 to 5 mm.
[0022]
A sixth means for solving the above problem is that a lens to be processed as an intermediate product is processed by any one of the first means to the fifth means to form a ball into a final product. A method for producing a spectacle lens with an oil-repellent coat (claim 6).
[0023]
According to this means, since the axial deviation in the ball-sliding process is unlikely to occur, it is possible to manufacture an oil-repellent coated spectacle lens as a final product with a good yield.
[0024]
A seventh means for solving the above-mentioned problem is a pressure-sensitive adhesive tape in which the thickness is 10 to 100 μm and the surface of a polymer film having a Young's modulus of 1 Gpa or more is coated with a silicon-based pressure-sensitive adhesive, The shape is a circle having a hole in the center, or an ellipse, the major axis of the ellipse is 30 mm to 60 mm, the minor axis is 20 mm to 40 mm, and the diameter of the circle inscribed in the central hole is 3 to 15 mm. A pressure-sensitive adhesive tape (claim 7).
[0025]
An eighth means for solving the above-mentioned problem is the sixth means, wherein the light transmittance of the polymer film is 80% or more (Claim 8).
[0026]
A ninth means for solving the above-mentioned problem is the sixth means or the seventh means, wherein a pad portion not coated with an adhesive is provided on the surface of the polymer film at an end portion. (Claim 9).
[0027]
A tenth means for solving the above-mentioned problem is the ninth means, wherein the width of the pad portion is 1 to 5 mm (Claim 10).
[0028]
These seventh to tenth means are used for the third to fifth means, and have the same functions and effects as described in the description of the second to fifth means. Having.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view for explaining the concept of a method for processing a ball of an eyeglass lens with an oil-repellent coat, which is an example of an embodiment of the present invention. First, as shown in FIG. 1A, before setting the lens 1 to be processed in the edging machine, adhesive tapes 2 are attached to both surfaces of the lens 1 to be processed. This adhesive tape 2 has transparency in which the light transmittance is 80% or more, has a thickness of 10 to 100 μm, and has an adhesive coated on the surface of a polymer film having a Young's modulus of 1 Gpa or more. It is made up of an attached tape, and is attached by pressing the adhesive side to the surface of the lens 1 to be processed.
[0030]
Then, the lens 1 to be processed is fixed to the lock cap 3 with a double-sided adhesive tape 4, as shown in FIG. A double-sided adhesive tape 4 is attached to the lock cap 3 in advance, and the other side of the lens 1 is attached to the adhesive tape 2 attached to the surface of the lens 1 to be processed. Fixed to. Then, the lock cap 3 is fixed to the upper lens processing shaft 5. Next, the lens 1 to be processed is sandwiched and fixed between the lower lens processing shaft 6 and the lock cap 3. In this state, the outer periphery of the lens to be processed 1 is processed by a grinding tool (not shown).
[0031]
By adhering the above-mentioned adhesive tape 2 to the surface of the lens 1 to be processed, even if the lens 1 to be processed is coated with an oil-repellent material, the gap between the adhesive tape 2 and the lens 1 to be processed is maintained. Fixed without slipping. Since there is no slippage between the double-sided adhesive tape 4 and the double-sided adhesive tape 4, the lens to be processed 1 is firmly interposed between the upper lens processing axis 5 and the lower lens processing axis 6 via the lock cap 3. To prevent the occurrence of axis deviation during processing.
[0032]
FIG. 2 shows a planar shape of the adhesive tape 2 suitable for use in such a ball processing method. The planar shape is preferably an ellipse having a hole 7 at the center as shown in FIG. 7A, and the major axis R1 of the ellipse is preferably 30 mm to 60 mm, and the minor axis R2 is preferably 20 mm to 40 mm. The shape of the central hole 7 is preferably a circle, an ellipse, or a similar shape, but the shape is not particularly limited. The diameter of the circle inscribed in the central hole 7 is preferably 3 to 15 mm.
[0033]
(B) is a figure which shows the planar shape and central cross-sectional shape of the adhesive tape 2 in which the pad part 10 was provided in the edge part. That is, in this example, the pad portion 10 is provided on the right end of the polyester film 8, and the adhesive 9 is not provided on this portion. Therefore, at the time when the ball processing of the lens to be processed is completed, the adhesive tape 2 can be easily peeled from the lens to be processed with this portion as a base point. The width W of the pad portion 10 is preferably 1 to 5 mm. In addition, by coloring the pad portion, the starting point when the adhesive tape 2 is peeled can be easily visually recognized, and workability is improved.
[0034]
【Example】
Using a high-refractive index plastic (n = 1.67) manufactured by Nikon Essilor Co., Ltd. as a base material and subjecting the lens to an oil-repellent coating with a fluororesin, the lens is processed by the method of the present invention, and the conventional method is used. Was compared.
[0035]
The following three types of processing machines were used.
(1) Nidek SE9090 (High-load machine with two built-in grinding wheels)
(2) Nidek LE9000 (normal load machine with one built-in grindstone)
(3) ALE5000 made by Topcon (normal load machine with one built-in grindstone)
The shape of the lens to be processed is an aspheric lens having a diameter of 80 mm, a thickness of a central portion of 1.0 mm, a radius of curvature of a central portion of the front surface of 1367.8 mm, and a radius of curvature of a central portion of the rear surface of 1062.5 mm. The subsequent shape was a rectangle of 54 mm × 27 mm, and R processing (chamfering) with a radius of 7 mm was performed at four corners. As the adhesive tape to be used, a polyester film tape with a silicone-based adhesive (manufactured by Sumitomo 3M, polymer film thickness: 40 μm, Young's modulus: 4 GPa), an elliptical shape having a major axis of 40 mm, a minor axis of 30 mm, and a major axis of 40 mm An oval shape having a minor diameter of 20 mm was used. As the lens lock cap, a small size cap for SE9090 was used. The surface of the lens lock cap that is in contact with the adhesive tape has a height of 19 mm and a width of 21.5 mm, and is a barrel-shaped swollen in the width direction. The longitudinal direction of the lens after the ball-grinding, the major axis direction of the adhesive tape, and the width direction of the lens lock cap were made to coincide.
[0036]
That is, a polyester film tape with a silicone-based adhesive having the above-mentioned shape is attached to both surfaces of a lens to be processed, and this is attached to a lens lock cap with a double-sided adhesive tape (LEAPII manufactured by Sumitomo 3M). It was fitted to a processing shaft, sandwiched by another processing shaft, and performed ball-sliding. As a comparative example, a ball-sliding process was performed under the same conditions for a tape that did not use a polyester film tape with a silicone-based adhesive.
[0037]
Table 1 shows the combinations of the conditions and the results of the ball processing. The evaluation of the axis deviation in Table 1 is as follows.
○ → Axis misalignment 1 ° or less (including 0 °)
Δ → axis deviation exceeding 1 ° and 2 ° or less × → axis deviation exceeding 2 °.
[0038]
The finish evaluation was performed on the bevel and the outer shape, and the following classification was made.
○ → No defect × → No defect In Table 1, double-edged in the grinding wheel mode refers to the case where machining was performed using two grindstones, and single-edged refers to the case where machining was performed using one grindstone. .
[0039]
(Table 1)
[0040]
[Table 1]

[0041]
From Table 1, it can be seen that in Examples of the present invention in which the silicone adhesive tape was attached to the surface of the lens, the axis deviation was 1 ° or less, and the finish was good. On the other hand, in Comparative Examples in which the silicone-based pressure-sensitive adhesive tape was not used, the axis deviation exceeded 2 ° and the finish was not good.
[0042]
【The invention's effect】
As described above, according to the present invention, even in a lens in which at least one of the lens surfaces is provided with an oil-repellent coating, a method for performing ball-sliding without causing axial misalignment, and using the ball-sliding as an intermediate step The present invention can provide a method for producing a lens including the same, and a tape with an adhesive used for this edging.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining the concept of a method for processing a ball of a spectacle lens with an oil-repellent coat, which is an example of an embodiment of the present invention.
FIG. 2 is a diagram showing a planar shape of an adhesive tape suitable for use in a method for processing a ball according to an embodiment of the present invention.
FIG. 3 is a view for explaining the concept of a conventional method of processing a ball for a spectacle lens.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lens to be processed, 2 ... Adhesive tape, 3 ... Lock cap, 4 ... Double-sided adhesive tape, 5 ... Upper lens processing axis, 6 ... Lower lens processing axis, 7 ... Hole, 8 ... Polyester film, 9 ... Adhesive … 10… pad part

Claims (10)

A method for edging an oil-repellent coated lens into various types of edging by a edging machine. A ball of a spectacle lens with an oil-repellent coat, characterized by comprising a step of attaching a tape with an adhesive coated with a silicone-based adhesive to the surface of the polymer film, and then setting the tape on the glazing machine. Sliding processing method. The method according to claim 1, wherein the light transmittance of the polymer film is 80% or more. The shape of the pressure-sensitive adhesive tape is a circle or an ellipse having a hole in the center, the major axis of the ellipse is 30 mm to 60 mm, the minor axis is 20 mm to 40 mm, and the diameter of the circle inscribed in the central hole is 3. A method for processing a ball of an eyeglass lens with an oil-repellent coat according to claim 1, wherein the diameter is 3 to 15 mm. The edge part of the said tape with adhesives, The pad part which is not coated with an adhesive is provided in the polymer film surface, The Claims any one of Claim 1 to 3 characterized by the above-mentioned. A method for processing eyeglasses with an oil-repellent coat. The method of claim 4, wherein the width of the pad portion is 1 to 5 mm. An oil-repellent coating comprising a step of subjecting a lens to be processed, which is an intermediate product, to a method of processing a ball according to any one of claims 1 to 5 to process the lens into a shape of a final product. For manufacturing eyeglass lenses with a lens. A pressure-sensitive adhesive tape having a thickness of 10 to 100 μm and a silicone-based pressure-sensitive adhesive coated on the surface of a polymer film having a Young's modulus of 1 Gpa or more, the shape of which is circular or oval having a hole in the center. A tape with an adhesive, which has a shape, a major axis of an ellipse of 30 mm to 60 mm, a minor axis of 20 mm to 40 mm, and a diameter of a circle inscribed in a central hole of 3 to 15 mm. The pressure-sensitive adhesive tape according to claim 7, wherein the light transmittance of the polymer film is 80% or more. The tape with an adhesive according to claim 7 or 8, wherein a pad portion that is not coated with an adhesive is provided on the surface of the polymer film at an end portion. The pressure-sensitive adhesive tape according to claim 9, wherein the width of the pad portion is 1 to 5 mm.

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