JP2004226205A - Test method for evaluating coat film adhesion performance of spectacle lenses - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaluation method of high reproducibility and high reliability performed under conditions close to an actual use condition by a user, when evaluating coating film close contact performance of a spectacle lens having a coating film on a surface. <P>SOLUTION: The spectacle lens is held and flows are given to the coating film of the spectacle lens by moving horizontally a frictional flawing body having a rough surface while pressing the body against the lens, and the coating film close contact performance onto the spectacle lens is evaluated after keeping the lens in an acceleration testing machine for weatherablity for an optional period. The test may be carried out by changing optionally the kind of the frictional flawing body. The may be performed by optionally changing the frictionally flawing body, motion in the horizontal direction and the testing machine and the like. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an eyeglass lens evaluation test method and its conditions, and more particularly to an evaluation test method for evaluating coat film adhesion performance (hard peeling) and its conditions.
[0002]
[Prior art]
Synthetic resin spectacle lenses, which have become mainstream in recent years, are generally inferior in surface hardness as compared with glass lenses, and thus are coated on the surface with a synthetic resin material having a higher hardness than fabric. The performance required for the spectacle lens is, of course, the optical performance that can correct the user's visual acuity, but is not affected by the environment during use or storage, and maintains the original coat film adhesion performance for a long time. Durability quality and the like. However, in the case of synthetic resin spectacle lenses, alkaline substances, acidic substances, chemicals, and the like penetrate from scratches on the surface (coat film), and are further affected by ultraviolet rays, heat, and the like during use, causing coat film peeling. There was something. For this reason, the coat film adhesion performance is an important evaluation item.
[0003]
As a method for evaluating the coat film adhesion performance of spectacle lenses, JIS K5400 (paint general test method) 8.5.2 “cross-cut tape method” is generally used. The crosscut tape method uses a cutter or the like to make sharp cuts in a grid pattern (deep scratches that pass through the coat film and reach the fabric) on the surface coat film, apply an adhesive tape, and check the adhesion state of the coat film after peeling. This is a method of visually evaluating.
[0004]
In addition, as a method of evaluating the weather resistance of the coat film of the spectacle lens, the cross-cut tape method is applied, and the spectacle lens with the scratch is put into an acceleration tester such as a weather resistance, and taken out at regular intervals. A method of applying an adhesive tape to the sharp scratches on the grid and peeling it off at a stretch, and then evaluating the coat film adhesion performance from the size, shape, interface, etc. of the stripped portion of the sharp scratches on the grid. Used.
[0005]
[Problems to be solved by the invention]
However, when the evaluation is performed by the above method, there is a problem that the state of the coating film peeling cannot be reproduced unlike the peeling state accompanying the actual use of the user. Furthermore, even if the film was put into an acceleration test machine for a long time, the coating film was not easily peeled, and the acceleration performance was slow.
[0006]
The present invention has been made in view of the above circumstances, and in evaluating the coat film adhesion performance of spectacle lenses, the coat film peeling state associated with the actual use of the user and the reproducibility of the repeated test are high, and the acceleration performance is also fast. Another object of the present invention is to provide a highly reliable evaluation test method even when performing a relative comparison.
[0007]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to achieve the above object, and as a method of accurately evaluating the coat film adhesion performance of the spectacle lens, a method of applying a scratch while pressing an abrasion object on the coat film of the spectacle lens However, it was found that it was more effective for the reliability of the evaluation test than a case where sharp cuts like a grid were cut with a cutter and an adhesive such as an adhesive tape was attached and peeled off at a stretch.
[0008]
That is, while holding the spectacle lens, and in a state where an abraded object having a rough surface is brought into contact with the coat film of the spectacle lens, a load is applied to the abraded object and pressed horizontally onto the coat film while pressing the abraded object. Move it in the direction to make scratches (shallow scratches that do not pass through the coat film and deep scratches that pass and reach the fabric), put them into an accelerated testing machine for weather resistance, etc., and take them out at regular intervals, and remove By observing the area size, shape, peeling interface, etc. of the portion, the coating film adhesion performance of the lens is evaluated.
[0009]
In this case, the scratch conditions that affect the evaluation result include the material and shape of the abrasion object, the amount of load, the horizontal stroke and speed of movement, the number of times of movement, and the duration of the movement. By using it, it can be defined as numerical data or a clear value. Therefore, in the next experiment, it is possible to make a flaw under completely the same conditions by reproducing these flaw conditions, and high reliability and reproducibility can be evaluated. Further, since these flaw conditions can be arbitrarily changed, various tests required by the user can be performed by changing the combination of the flaw conditions according to the assumed use environment. In addition, by incorporating a plurality of the same mechanisms into the test apparatus and performing the same movement, it is possible to simultaneously scratch a plurality of lenses under the same conditions, or to simultaneously apply a plurality of scratch conditions.
[0010]
Therefore, the invention according to claim 1 is a method for evaluating the coat film adhesion performance of a spectacle lens having a coat film on the surface, wherein the spectacle lens is held, and the surface of the spectacle lens has a roughness on the coat film. It is characterized by performing a horizontal motion while pressing an abrasion object having a scratch to apply a scratch to the tester for an arbitrary period of time such as weather resistance, and then evaluating the coat film adhesion performance of the spectacle lens. This is a test method for evaluating coat film adhesion performance of spectacle lenses.
[0011]
According to a second aspect of the present invention, in the method for evaluating a coat film adhesion performance of a spectacle lens according to the first aspect, the kind of the abrasion object is arbitrarily changed to apply a flaw, and an arbitrary tester is applied to an accelerated testing machine for weather resistance and the like. The present invention provides an eyeglass lens coat film adhesion performance evaluation test method, which comprises evaluating the coat film adhesion performance of the spectacle lens after charging for a period of time.
[0012]
According to a third aspect of the present invention, in the method for evaluating the coat film adhesion performance of an eyeglass lens according to the first or second aspect, the horizontal movement stroke of the abrasion object, the number of times, and the amount of pressing load are arbitrarily changed. The present invention provides a method for evaluating the coat film adhesion performance of spectacle lenses, which is characterized by evaluating the coat film adhesion performance of the spectacle lens after being scratched and charged into an accelerated testing machine for weather resistance or the like for an arbitrary period.
[0013]
According to a fourth aspect of the present invention, in the test method for evaluating the coat film adhesion performance of an eyeglass lens according to any one of the first to third aspects, the type and the test conditions of the acceleration tester are arbitrarily changed and then input. Provided is a method for evaluating the coat film adhesion performance of a spectacle lens, which comprises evaluating the coat film adhesion performance of the spectacle lens.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments.
[0015]
As shown in FIG. 1, a lens 1 is sandwiched and held by a chuck 2. Other methods for holding the lens 1 include adhesion and suction. An abrasion jig 3 is set on the lens 1 in a vertical direction. The abrasion jig 3 is supported by the support member 4. The supporting method and the like are arbitrary, but the structure is such that it can move so as to follow the lens shape when performing horizontal movement. Further, a weight 5 is placed on the upper end of the abrasion jig 3. The weight 5 can be changed to an arbitrary weight. Alternatively, a load may be applied by other means such as a spring. The chuck 2 is mounted on a reciprocating table 7 of the evaluation test device 6, and the reciprocating table 7 has a structure capable of reciprocating in the horizontal direction by means such as a cam.
[0016]
In the evaluation test apparatus of FIG. 1, the lens is moved in the horizontal direction. However, a structure in which the lens is fixed and the abrasion jig moves may be used. Alternatively, a more complicated horizontal movement may be obtained by moving the lens and the abrasion jig in different directions.
[0017]
The reciprocating motion table 7 starts moving by operating the power switch 10, and the speed of the motion can be arbitrarily changed by the speed adjusting volume 8. Also, if the number of exercises is set in advance by the counter 9 and the reciprocation is stopped when the number of exercises is reached, it is possible to perform the reciprocation exactly an arbitrary number of times.
[0018]
In addition, the evaluation test apparatus 6 can install a plurality of chucks 2, abrasion jigs 3, a support member 4, and a weight 5 on a reciprocating table 7, and can scratch a plurality of lenses at once under the same conditions. is there.
[0019]
In this state, the abrasion object 11 is fixed to the tip of the abrasion jig 3, and the reciprocating table 7 is reciprocated an arbitrary number of times while pressing the abrasion object 11 against the lens 1 under the load of the weight 5. Can be scratched. The type of the abrasion object 11 is arbitrary such as sandpaper, steel wool, a wire brush, plastic, cloth, stone, sand, wood, and the like, and the type of the mesh and the like is also arbitrary.
[0020]
Using this evaluation test device, the speed and number of reciprocating movements can be set arbitrarily. Further, the stroke of the reciprocating motion can be arbitrarily set by changing a cam or the like for operating the reciprocating motion table 7.
[0021]
Acceleration of lenses with scratches (shallow scratches that do not pass through the coating film and deep scratches that reach the fabric through the coating film) under these conditions, such as weather resistance, heat resistance, moisture resistance, high temperature and humidity resistance, hot water resistance, etc. The lens is taken out at regular intervals and taken out at regular intervals, and by observing the size, shape, interface, etc. of the frayed portion of the flaw, the coating film adhesion performance of the lens can be evaluated. The type of the weather resistance tester is arbitrary such as a sunshine weather meter, a xenon weather meter, a fade meter, and outdoor exposure, and each test condition is also arbitrary.
[0022]
Further, as in the prior art, after affixing the adhesive tape to the damaged portion and peeling it off at a stretch, a method of evaluating the coat film adhesion performance from the area size, shape, peeling interface, etc. of the peeled portion is applied to the wounded portion of the present invention. By carrying out, it is possible to more severely evaluate the coating film adhesion performance of the lens.
[0023]
【Example】
As an abrasion object 11 of the evaluation test apparatus shown in FIG. 1, a sandpaper (# 1000) is attached to the abrasion jig 3 so that the sand surface side of the abrasion jig rubs on the lens 1, and a weight of 1 kg is put on the abrasion jig 3 as a weight. Attached. The lens 1 was fixed to the chuck 2, the abrasion object 11 was placed on the lens 1, and in this state, the reciprocating table was moved only once in the horizontal direction at a speed of 30 mm per stroke per second and stopped. Thereafter, the lens 1 was removed, and the state of the scratch on the lens surface was observed. The lens surface had a plurality of shallow scratches that did not pass through the coat film and a plurality of deep scratches that did pass through to the fabric in the direction in which the lens was moved only once. When a test was performed on a plurality of lenses of the same material and the same manufacturing history under the same conditions, the surface condition of the lenses after the test was almost the same, and scratching with high reproducibility was performed.
[0024]
In addition, as a simple method of performing the same scratching as above, place the lens on a weight meter such as a base weighing fixture and fix it with a fixing jig or one hand, and the sand side of the sandpaper with double-sided adhesive tape etc. The sandpaper is rubbed only once in a horizontal direction at a speed of about 30 mm per stroke for about one second while a weight of about 1 kg is applied to the weight meter while being fixed to a fixing jig or a fingertip so as to be rubbed. Thereafter, the lens was removed, and the state of the scratch on the lens surface was observed. As a result, there were a plurality of shallow scratches that did not pass through the coat film, and a plurality of deep scratches that did pass through to the fabric.
[0025]
The scratched lens was put into a sunshine weather meter of an acceleration tester, taken out every 20 hours, and observed for the size, shape, interface, etc. of the peeled part of the damaged part. A state close to peeling accompanying the above was able to be reproduced in about half shorter time (about 100 hours) than the conventional method (about 200 hours).
[0026]
In addition, when the same test is repeatedly performed, the reproducibility is extremely high and the acceleration performance is fast (the time for inputting to the acceleration test machine is shorter than the conventional method), and even when performing a relative comparison, the reliability is improved. A high evaluation test was performed.
[0027]
【The invention's effect】
As described above, according to the evaluation test method and the apparatus of the present invention, the coat film adhesion performance of the spectacle lens can be evaluated with high accuracy under an environment close to the actual use situation. In addition, since parameters such as the magnitude of the load to be applied, the shape and material of the abrasion object, the speed and direction of the aquatic movement of the lens and the abrasion object, the number of times, and the stroke can be arbitrarily set, the degree of freedom in the method of scratching is greater. In addition, it is possible to obtain a highly reliable coating film adhesion performance evaluation. Further, as a method of scratching, by installing a plurality of mechanisms on one unit, a plurality of lenses can be scratched simultaneously under the same condition, or a plurality of scratching conditions can be simultaneously performed. Evaluation test time can be significantly reduced.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of the present invention, in which a scuffing jig is set vertically on a spectacle lens held on a reciprocating table, a weight is placed on the upper end thereof, and the reciprocating table is operated in a horizontal direction. FIG. 2 is a conceptual diagram illustrating the configuration of the apparatus as described above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Eyeglass lens 2 Chuck 3 Scratching jig 4 Support member 5 Weight 6 Evaluation test device 7 Reciprocating table 8 Speed adjustment volume 9 Counter 10 Power switch 11 Scratched object

Claims (4)

A coating film adhesion performance evaluation test method for a spectacle lens having a coating film on a surface, the method comprising: holding a spectacle lens, and pressing an abraded material having a roughness on a surface against the coating film of the spectacle lens in a horizontal direction. The eyeglass lens is evaluated for its coat film adhesion performance, after being put into an accelerated testing machine for weather resistance and the like for an arbitrary period, and then evaluated for the coat film adhesion performance of the eyeglass lens. Method. The spectacle lens coating film adhesion performance evaluation test method according to claim 1, wherein the kind of the abrasion object is arbitrarily changed to cause a flaw, and the spectacle lens is put into an accelerated testing machine for weather resistance or the like for an arbitrary period, and then the spectacles are worn. A method for evaluating the coat film adhesion performance of a spectacle lens, comprising evaluating the coat film adhesion performance of a lens. 3. The method for evaluating the adhesion of a spectacle lens to a coating film according to claim 1 or 2, wherein the scratches are formed by arbitrarily changing the horizontal movement stroke, the number of times, and the amount of pressing load of the abrasion object, thereby improving weather resistance and the like. A test method for evaluating coat film adhesion performance of spectacle lenses, comprising evaluating the coat film adhesion performance of the spectacle lens after charging the spectacle lens for an optional period. The method for evaluating the coat film adhesion performance of a spectacle lens according to any one of claims 1 to 3, wherein the type of the acceleration tester and the test conditions are arbitrarily changed and then the spectacle lens is applied. A method for evaluating the coat film adhesion performance of spectacle lenses, characterized by evaluating the following.

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