KR102231541B1 - Manufacturing Method of Diopter Polarizing Lens using various Mold - Google Patents

Abstract

The present invention relates to a method of manufacturing a diopter polarizing lens by using various molds, comprising the following steps of: (step 1) taping an upper mold by using a first tape; (step 2) dropping a resin composition for an upper lens into a concave portion of the upper mold; (step 3) laminating a first protective film on the resin composition for the upper lens placed on the concave portion of the upper mold; (step 4) laminating a polarizing film on an upper part of the first protective film; (step 5) laminating a second protective film on an upper part of the polarizing film; (step 6) preliminarily polymerizing the resin composition for the upper lens; (step 7) arranging the upper mold and a lower mold to be spaced apart from each other and taping the upper and lower molds by using a second tape; (step 8) injecting a resin composition for a lower lens through separation space of the second protective film and the lower mold; and (step 9) mainly polymerizing the resin compositions for the upper lens and the lower lens in the gel state. According to the present invention, a finished diopter polarizing lens can be manufactured by immediately applying prescription instead of making a polarized lens as a semi-finished lens and processing the lens in order to apply prescription, and thus it is possible to reduce time and cost for processing a semi-finished lens.

Description

Manufacturing Method of Diopter Polarizing Lens using various Molds

The present invention relates to a method of manufacturing a power polarization lens using a variety of molds, and more particularly, instead of making a polarized lens into a semi-lens and processing it to add power, it is possible to manufacture a finished product power polarization lens by directly inserting the power, The present invention relates to a method of manufacturing a power polarization lens using a variety of molds, which can reduce the time and cost of processing a semi-finished lens, which is a semi-finished lens.

Polarized light refers to a wave of light that vibrates only in a specific direction through a polarizer (polarizing plate) through which natural light that is difficult to repeat reflection and refraction is transmitted in only one direction.

In our daily life, when we accept natural light that is reflected by natural objects and repeatedly reflects and refracts into our eyes as it is, it causes a glare phenomenon. Wearing a polarizing lens that applies the principle of polarization can reduce glare. In particular, it is possible to reduce glare by blocking reflected light and refracted light at sunrise or sunset, and the viewing distance for viewing objects becomes longer. On the other hand, if you wear a polarizing lens while driving, unnecessary light is blocked and a wide field of view can be secured, which helps safe driving.

Conventional polarizing lenses are widely used in manufacturing by heating and attaching a polarizing sheet to the surface of a plastic lens, but since the polarizing film is exposed on the surface of the lens, the polarizing film is easily damaged by external impacts or scratches. There is a problem that can not be exercised.

To solve this problem, a method of manufacturing a polarizing lens by placing a polarizing film inside a gasket mold and injecting a resin into the mold has been disclosed. The method of using a gasket mold has a problem of low production efficiency because it requires more than a certain skill level to assemble the mold and a work environment required for assembling the mold.

In order to solve the problem in the method of manufacturing a polarizing lens using a gasket mold as described above, Korean Patent Publication No. 10-0964579 (2010.06.21.) discloses a method of manufacturing a polarizing lens.

In the method of manufacturing the polarizing lens, a lower jig is placed on an upper portion of a glass lower mold that moves up and down by a pneumatic device, a polarizing film is placed on the lower jig, and then an upper portion of the lower jig is supported so that the polarizing film is supported. Place a jig, place a glass upper mold that moves up and down by a pneumatic device at the top of the upper jig, and then tap a heat-resistant masking tape on the outer circumference of the upper and lower molds and the upper and lower jig with a taping device to integrate it , Polarization through the heat-resistant masking tape and upper and lower jigs in the lower space created by contacting the polarizing film, the lower jig, and the lower glass mold, and the upper space created by contacting the upper glass mold, the upper jig, and the polarizing film. It is configured to manufacture a polarizing lens through a process of solidifying after injecting a liquid raw material for manufacturing the lens.

The polarizing lens manufacturing method requires a lower jig and an upper jig to support the polarizing film. The lower jig has various embodiments, but looking at one of them, "the lower jig is configured to extend a vertical surface to form an obtuse angle after forming an upward inclined surface by proceeding from the inside to the outside in a ring shape. Thereafter, the upwardly inclined surface and the upwardly vertical surface are extended to form a shape of a cross section, and the upwardly inclined surface and the upwardly vertical surface are formed in an obtuse angle of more than 90°." Is written.

Accordingly, the method of manufacturing the polarizing lens has an advantage of not using a gasket mold, but has a disadvantage in that a lower jig and an upper jig having a complex structure are required to support the polarizing film.

On the other hand, Korean Patent Publication No. 10-1290129 (2013.06.28.) discloses a method of manufacturing a polarizing lens. The method of manufacturing the polarizing lens includes a jig preparation step of preparing a circular jig used as an assembly standard of the polarizing unit; A polarizing unit assembly step of assembling the polarizing unit by sequentially disposing a lower support, a polarizing film, and an upper support having the same curvature on the jig and fixing them; A glass mold arrangement step of arranging a pair of glass molds up and down on a table on a vertical axis of rotation; Placing the polarizing unit between the glass molds, wherein the polarizing unit and the glass mold on the upper side of the polarizing unit are spaced apart from each other; An alignment step of aligning the glass mold and the central axis of the polarizing part to match each other; A taping step of taping a heat-resistant tape along side surfaces of the aligned glass mold and the polarizing part; And a resin injection step of injecting resin from an upper portion of the spaced space between the glass mold and the polarizing unit after the tapered glass mold and the polarizing unit are separated from the table and disposed vertically. Includes.

The manufacturing method of No. 10-1290129 has the advantage that the jig is not complicated compared to the manufacturing method of No. 10-0964579, but a jig, a lower support, and an upper support are required. There is a disadvantage of having to form a notch groove in the.

In order to solve the above problems, the present applicant has applied for and registered a method of manufacturing a polarizing lens (Korean Patent Registration No. 10-1625484 (2016.05.30)).

When manufacturing the polarizing lens by taping instead of a gasket mold, the lower jig, upper jig, lower support, and upper support are not required, and there is no need to form a notch groove in the polarizing film, and pre-polymerization and main polymerization are simple. There is an advantage of being able to manufacture a polarizing lens.

However, since the polarizing lens is a semi-lens, which is a semi-finished lens, there is a problem that it takes a lot of time and cost because the semi-lens must be processed in order to add power.

KR 10-0964579 B1 2010.06.21. KR 10-1290129 B1 2013.06.28. KR 10-1625484 B1 2016.05.30.

An object of the present invention is to make a polarized lens into a semi-lens, and instead of processing it to add the power, it is possible to manufacture a finished power polarized lens by directly inserting the power, so that the time and time for processing a semi-finished lens, which is a semi-finished lens, are processed. It is to provide a method of manufacturing a power polarization lens using a variety of molds that can reduce cost.

In order to achieve the above object, the present invention provides the following means.

The present invention, the step of taping the upper mold using a first tape (step 1); Dropping a resin composition for an upper lens into the recessed portion of the upper mold (step 2); Laminating a first protective film on the resin composition for an upper lens placed in the recessed portion of the upper mold (step 3); Laminating a polarizing film on the first protective film (step 4); Laminating a second protective film on the polarizing film (step 5); Prepolymerizing the resin composition for the upper lens to form a gel-like upper lens (step 6); Disposing the upper and lower molds to be spaced apart from each other and taping them using a second tape (step 7); Injecting a resin composition for a lower lens through a space between the second protective film and the lower mold (step 8); And polymerizing the resin composition for the upper lens and the lower lens in a gel state (step 9). It provides a method of manufacturing a power polarization lens using a variety of molds, including.

In step 1, the upper mold is selected from the group consisting of an upper mold capable of making an upper lens of 4.25 curve, an upper mold capable of making an upper lens of 3.00 curve, and an upper mold capable of making an upper lens of 1.50 curve. Use either one.

In the step 3, the first protective film is 80 to 90% by weight of a polyurethane resin, 5 to 15% by weight of an acrylic resin, and 1 to 10% by weight of methylene diphenyl diisocyanate are stirred at 30 to 35°C for 5 to 10 minutes. However, the manufacturing method of the polyurethane resin comprises the steps of preparing a prepolymer by reacting a polyol, a monomer diol, and a diisocyanate (S 1); And adding a chain extender to the prepolymer to synthesize a polyurethane resin by chain extension reaction of the prepolymer (S2). Includes.

In the step 5, the second protective film comprises 80 to 90% by weight of a polyester resin, 5 to 15% by weight of an acrylate resin, and 1 to 10% by weight of cyclohexylmethane diisocyanate at 30 to 35°C. Prepared by stirring for minutes.

In step 7, the lower mold is a lower mold capable of making a lower lens with a 4.25 curve, a lower mold capable of making a lower lens with a 4.50 curve, a lower mold with a lower lens having a 4.75 curve, and a lower lens with a 5.00 curve. A lower mold to make a lower lens with a 5.25 curve, a lower mold to make a lower lens with a 5.50 curve, a lower mold with a 5.75 curve lower lens, and a lower lens with a 6.00 curve. A lower mold that can be used, a lower mold that can make a lower lens with a 9.00 curve, a lower mold that can make a lower lens with a 9.25 curve, a lower mold that can make a lower lens with a 9.50 curve, and a lower lens with a 9.75 curve. Use any one selected from the group consisting of a lower mold, a lower mold capable of making a lower lens with a 10.00 curve, and a lower mold capable of making a lower lens with a 10.25 curve.

In step 8, the resin composition for the lower lens is mixed with 1 to 3 parts by weight of a sunscreen agent to 100 parts by weight of the resin composition for the upper lens, and the sunscreen is 50 to 60% by weight of benzotriazole and 2-(2) -hydroxy-5-t-octylphenyl) benzotriazole 40-50% by weight.

In the method of manufacturing a power polarization lens using various molds according to the present invention, instead of making the polarized lens into a semi-lens and processing it to put the power, it is possible to directly insert the power and manufacture a finished power polarized lens, so that the semi-lens, which is a semi-finished lens ( Semi-finished lens) processing time and cost can be saved.

1 is a view for explaining a step of taping an upper mold according to the present invention using a first tape.
2 is a view for explaining the step of dropping the resin composition for an upper lens in the upper mold concave portion according to the present invention.
3 is a view for explaining a step of laminating a first protective film, a polarizing film, and a second protective film on the upper lens resin composition placed in the upper mold recess according to the present invention.
4 is a view for explaining a step of disposing an upper mold and a lower mold to be spaced apart and taping using a second tape.
5 is a view for explaining a power polarization lens using various molds according to the present invention.

Hereinafter, the present invention will be described in detail.

Conventionally, in order to prevent deformation of a thin polarizing film when manufacturing a polarizing lens by forming a polarizing film between the lenses, a semi-finished lens was manufactured as a semi-finished lens.

In order to add power to the polarizing lens, there is a problem that it takes a lot of time and cost because the semi-lens must be processed.

In the present invention, instead of making a polarized lens into a semi-lens and processing it to put the power, the power can be added to produce a finished power polarized lens, thus reducing the time and cost of processing a semi-finished lens, which is a semi-finished lens. There are features that can be saved.

1 is a diagram for explaining a step of taping an upper mold according to the present invention using a first tape, and FIG. 2 illustrates a step of dropping a resin composition for an upper lens into a concave portion of the upper mold according to the present invention. 3 is a view for explaining the step of laminating a first protective film, a polarizing film, and a second protective film on the resin composition for an upper lens placed in the concave portion of the upper mold according to the present invention, and FIG. 4 Is a view for explaining the step of disposing the upper mold and the lower mold to be spaced apart and taping using a second tape, and FIG. 5 is a view for explaining a power polarization lens using various molds according to the present invention.

First, a method of manufacturing a power polarization lens using various molds according to the present invention will be described with reference to FIGS. 1 to 5.

A method of manufacturing a power polarization lens using various molds according to the present invention,

Taping the upper mold 10 using a first tape 20 (step 1);

Dropping the upper lens resin composition 30 into the concave portion of the upper mold 10 (step 2);

Laminating a first protective film 42 on the resin composition 30 for an upper lens placed in the concave portion of the upper mold 10 (step 3);

Laminating a polarizing film 40 on the first protective film 42 (step 4);

Laminating a second protective film 44 on the polarizing film 40 (step 5);

Prepolymerizing the upper lens resin composition 30 to form a gel-like upper lens 32 (step 6);

Disposing the upper mold 10 and the lower mold 50 to be spaced apart from each other and taping using a second tape 70 (step 7);

Injecting a resin composition for a lower lens 60 through a space between the second protective film 44 and the lower mold 50 (step 8); And

Polymerizing the gel-like upper lens 32 and the lower lens resin composition 60 (step 9);

Includes.

Referring to FIG. 1, in step 1, the upper mold 10 uses a glass mold washed with pure water, and the convex portion of the upper mold 10 faces downward, and the concave portion of the upper mold 10 faces upward. Place it face up. The first tape 20 for taping the upper mold 10 is a heat-resistant tape. It is preferable to tap a predetermined size higher than the thickness of the upper mold 10 by using the first tape 20. The reason for taping a certain size higher than the thickness of the upper mold 10 is to prevent the upper lens resin composition 30 from being discharged to the outside.

The upper mold 10 is any one selected from the group consisting of an upper mold capable of making an upper lens of 4.25 curve, an upper mold capable of making an upper lens of 3.00 curve, and an upper mold capable of making an upper lens of 1.50 curve. Can be used.

Referring to FIG. 2, step 2 is a step of dropping the resin composition 30 for an upper lens using an injection mechanism in the concave portion of the upper mold 10. The amount of the upper lens resin composition 30 to be dropped is not particularly limited, but if an excessively small amount is dropped, the thickness of the upper lens 34 of the polarizing film 40 becomes too thin, so that the polarizing film 40 will have an external impact. There is a problem that may be affected by, and if an excessive amount is dropped, the thickness of the upper lens 34 of the polarizing film 40 becomes too thick, and thus the high refractive polarizing lens 100 cannot be manufactured.

In the present invention, the thickness of the upper lens 34 of the polarizing film 40 can be adjusted according to the amount of the resin composition 30 for the upper lens, and the thickness of the upper lens 34 of the polarizing film 40 is 0.3~ There is an advantage of being able to form 0.8mm.

The upper lens resin composition 30 may be prepared by mixing and dissolving a urethane monomer, an ultraviolet absorber, a release agent, and a catalyst to form a homogeneous solution, and degassing the mixed solution.

The ultraviolet absorber is not particularly limited, and 2-(2'-hydroxy-5-methylphenyl)-2H-benzotriazole; 2-(2'-hydroxy-3',5'-di-t-butylphenyl)-5-chloro-2H-benzotriazole; 2-(2'-hydroxy-3'-t-butyl-5'-methylphenyl)-5-chloro-2H-benzotriazole; 2-(2'-hydroxy-3',5'-di-t-amylphenyl)-2H-benzotriazole; 2-(2'-hydroxy-3',5'-di-t-butylphenyl)-2H-benzotriazole; 2-(2'-hydroxy-5'-t-butylphenyl)-2H-benzotriazole; 2-(2'-hydroxy-5'-t-octylphenyl)-2H-benzotriazole; 2,4-dihydroxybenzophenone; 2-hydroxy-4-methoxybenzophenone; 2-hydroxy-4-octyloxybenzophenone; 4-dodecyloxy-2-hydroxybenzophenone; 4-benzooxy-2-hydroxybenzophenone; 2,2',4,4'-tetrahydroxybenzophenone; Any one selected from the group consisting of 2,2'-dihydroxy-4,4'-dimethoxybenzophenone and mixtures thereof may be used.

The release agent is not particularly limited, and isopropyl forstate; Diisopropyl phosphate; Butyl phosphate; Octyl phosphate; Dioctyl phosphate; Isodecyl phosphate; Diisodecyl phosphate; Tridecanol phosphate; Any one of a bis(tridecanol) phosphate, an acidic phosphonic ester, an ethylene oxide or a phosphate ester compound to which propylene oxide is added may be used.

The catalyst is not particularly limited, and as a radical polymerization initiator, benzoyl peroxide, p-chlorobenzoyl peroxide, lauroyl peroxide, acetyl peroxide, di-t-butyl peroxide, 1,1-di-t-butyl per Oxy-3,3,5-trimethylcyclohexane, t-butylperoxypivalate, t-butylperoxy-2-ethylhexanoate, t-butylperoxybenzoate, bis(4-t-butylcyclohexyl ) Peroxides such as peroxydicarbonate, diisopropylperoxydicarbonate, and t-butylperoxyisopropylcarbonate, and azo compounds such as azobisisobutyronitrile, or a mixture of two or more may be used.

Referring to FIG. 3, step 3 is a step of laminating a first protective film 42 on the resin composition 30 for an upper lens placed in the concave portion of the upper mold 10.

The first protective film 42 is prepared by stirring 80 to 90% by weight of a polyurethane resin, 5 to 15% by weight of an acrylic resin, and 1 to 10% by weight of methylene diphenyl diisocyanate at 30 to 35°C for 5 to 10 minutes. do.

It is preferable that the first protective film 42 is laminated to a thickness of 0.01 to 0.1 mm.

The manufacturing method of the polyurethane resin,

Preparing a prepolymer by reacting a polyol with a monomer diol and a diisocyanate (S 1); And

Synthesizing a polyurethane resin by a chain extension reaction of the prepolymer by adding a chain extender to the prepolymer (S2);

Includes.

In the S 1, 35 to 45% by weight of polyol, 25 to 35% by weight of monomeric diol and 25 to 35% by weight of diisocyanate are added,

It is synthesized by adding 0.05 to 0.1 parts by weight of a catalyst based on 100 parts by weight of the mixture of the polyol and the monomer diol.

In S 1, a polyol and a monomer diol are first added, and a diisocyanate is appropriately divided into 4 to 6 steps with a solvent and reacted to prepare a prepolymer having an appropriate viscosity.

The polyol is a compound having at least two hydroxyl groups, and is used to improve the cohesiveness of the polyurethane resin, and if it is contained less than 35% by weight, there is a problem that the cohesive strength of the polyurethane resin is lowered. There is a problem that the viscosity increases and the final product becomes hard.

The polyol may be any one selected from the group consisting of polyester polyol, polycarbonate diol, and polycaprolactone glycol.

It is preferable that the weight average molecular weight of the polyol is 2,500 to 3,500.

The monomer diol is used to minimize the stability of the polyurethane and the content of ionic groups, and if it is contained in less than 25% by weight, there is a problem that the stability of the polyurethane resin is deteriorated, and if it is contained in more than 35% by weight, the reactivity can be controlled. It cannot be done, and there is a problem that the final product becomes hard.

The monomer diol may be any one selected from the group consisting of ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, and neopentyl glycol.

The organic solvent used in S 1 is preferably DMF (Dimethylformamide), and the amount of the organic solvent used at this time is 150 to 250 parts by weight of the organic solvent so that the viscosity can be adjusted with respect to 100 parts by weight of a mixture of polyol and diol. It is preferable to use it within a negative range.

It is preferable that the diisocyanate contains 25 to 35% by weight, and if it is contained less than 25% by weight, there is a problem that the synthetic yield of the polyurethane resin is lowered and the adhesive property is deteriorated. There is a fear of gelation due to an excessive amount of diisocyanate. It is preferable to adjust the NCO/OH ratio of the mixture of polyol and diol and diisocyanate to 1.2 to 1.4.

The diisocyanate is an aromatic aliphatic diisocyanate, 1,3- or 1,4-xylene diisocyanate or a mixture thereof, ω,ω'-diisocyanate-1,4-diethylbenzene and 1,3-or 1,4 Any one selected from the group consisting of -bis(1-isocyanate-1-methylethyl)benzene (common name; tetramethylxylene diisocyanate) can be used.

In addition, the catalyst is preferably reacted by adding 0.05 to 0.1 parts by weight of the catalyst based on 100 parts by weight of the mixture of the polyol and the monomer diol. If the amount of the catalyst added is less than 0.05 parts by weight, the reaction between the mixture of polyol and monomeric diol and diisocyanate may not proceed properly, resulting in a decrease in the polyurethane synthesis yield or lengthening the reaction time, and if it exceeds 0.1 parts by weight Although the reaction proceeds smoothly, there is a concern that the reaction effect is no longer improved in proportion to the amount of catalyst added, and the mechanical properties of the synthesized polyurethane are deteriorated.

As the catalyst, any one selected from amine-based catalysts such as triethanolamine, triethylenediamine, tris(dimethylaminopropyl)amine, or metal-based compounds such as dibutyltin dilaurate (DBTDL) and cobalt octoate is used. It is desirable to do it.

The chain extender in S 2 serves to synthesize polyurethane by chain extending the prepolymer, and is characterized in that 0.01 to 0.1 parts by weight is used based on 100 parts by weight of a mixture of polyol and monomer diol. If the amount of the chain extender is less than 0.01 parts by weight, the chain extension effect is deteriorated, and the viscosity properties of the polyurethane are deteriorated. If the amount exceeds 0.1 parts by weight, storage stability and the like may be deteriorated.

The chain extender may be a monomeric amine type, and the monomeric amine type used is a material containing two or more primary or secondary amino groups, hydrazine, ethylene diamine, isopropylene diamine, diethylene triamine, tri Any one selected from ethylenetetraamine, diaminodiphenylmethane, and the like can be used.

The S 2 is preferably reacted at 85 to 90° C. for 1 to 2 hours while adding the chain extender to the polyurethane prepolymer. If the polyurethane synthesis conditions are less than the above-limited range, there is a concern that the urethane bonding reaction may be slow, and if it exceeds the above-limited range, the reaction may be accelerated and it may become difficult to control the viscosity.

Step 4 is a step of laminating the polarizing film 40 on the first protective film 42. The polarizing film 40 is formed with a diameter corresponding to the diameter of the polarizing lens 100 to be manufactured. The polarizing film 40 is preferably formed with a curvature corresponding to the curvature of the upper lens 34 of the polarizing lens 100 to be manufactured.

Step 5 is a step of laminating a second protective film 44 on the polarizing film 40.

The second protective film 44 is preferably laminated to a thickness of 0.01 ~ 0.1mm.

The second protective film 44 contains 80 to 90% by weight of a polyester resin, 5 to 15% by weight of an acrylate resin, and 1 to 10% by weight of cyclohexylmethane diisocyanate at 30 to 35°C for 5 to 10 minutes. It is prepared by stirring.

The present invention has the effect of preventing the polarizing film 40 from being deformed by providing the first protective film 42 and the second protective film 44 on the upper and lower portions of the polarizing film 40.

Step 6 is a step of prepolymerizing the upper lens resin composition 30 to form a gel-like upper lens 32.

In the present invention, the upper mold 10 in which the upper lens resin composition 30, the first protective film 42, the polarizing film 40, and the second protective film 44 are sequentially stacked is put into a polymerization oven. Because of the prepolymerization, the upper lens resin composition 30 forms a gel-like upper lens 32 and is combined with the first protective film 42.

In the pre-polymerization of the present invention, the polymerization oven is preheated to 15° C. for 5 minutes, and polymerization is performed at 15° C. for 6 hours, 15 to 60° C. for 4 hours, 60° C. for 10 hours, and 60 to 15° C. for 2 hours. It is desirable to do it. If the polymerization is performed outside the temperature conditions and time control, there is a problem in that a large number of defect rates occur due to bubbles and stains. By preliminary polymerization under the polymerization conditions, the upper lens resin composition 30 forms a gel-like upper lens 32 and is combined with the first protective film 42.

After the pre-polymerization is completed, the upper lens 32, the first protective film 42, the polarizing film 40, and the second protection in a gel state formed by pre-polymerizing the resin composition 30 for the upper lens from the polymerization oven After the upper mold 10 to which the film 44 is bonded is taken out, the convex portion of the upper mold 10 faces upward and the polarizing film 40 faces downward.

Referring to FIG. 4, step 7 is a step of disposing the upper mold 10 and the lower mold 50 to be spaced apart from each other and taping using a second tape 70.

The lower mold 50 uses a glass mold washed with pure water.

The lower mold 50 is disposed to be spaced apart from the mold 10 by a predetermined distance, and the convex portion of the lower mold 50 faces upward and the concave portion of the lower mold 50 faces downward.

The second tape 70 for taping the upper mold 10 and the lower mold 50 is a heat-resistant tape.

The technique of taping the upper mold 10 and the lower mold 50 spaced apart by a predetermined distance is a known technique, and thus a detailed description thereof will be omitted.

The lower mold 50 is a lower mold capable of making a lower lens with a 4.25 curve, a lower mold capable of making a lower lens with a 4.50 curve, a lower mold capable of making a lower lens with a 4.75 curve, and a lower lens with a 5.00 curve. A lower mold that can be used, a lower mold that can make a lower lens with a 5.25 curve, a lower mold that can make a lower lens with a 5.50 curve, a lower mold that can make a lower lens with a 5.75 curve, and a lower lens with a 6.00 curve. Lower mold, lower mold to make a lower lens with 9.00 curve, lower mold to make a lower lens with 9.25 curve, lower mold to make a lower lens with 9.50 curve, lower mold to make a lower lens with 9.75 curve , Any one selected from the group consisting of a lower mold capable of making a lower lens with a curve of 10.00 and a lower mold capable of making a lower lens with a curve of 10.25 may be used.

In the step 8, after removing a part of the second tape 70 in which the upper mold 10 and the lower mold 50 are integrated, a space separated from the second protective film 44 and the lower mold 50 This is a step of injecting the resin composition 60 for the lower lens through the method.

The lower lens resin composition 60 is preferably prepared by mixing 1 to 3 parts by weight of a sunscreen agent to 100 parts by weight of the upper lens resin composition 30.

If less than 1 part by weight of the sunscreen agent is mixed with 100 parts by weight of the upper lens resin composition 30, there is a problem that the sunscreen function is deteriorated, and even if it is mixed with more than 3 parts by weight, the sunscreen function is not further improved.

The sunscreen agent includes 50 to 60% by weight of benzotriazole and 40 to 50% by weight of 2-(2-hydroxy-5-t-octylphenyl)benzotriazole.

The resin composition 60 for the lower lens serves to prevent eye diseases caused by ultraviolet rays by including a sunscreen.

Step 9 is a step of polymerizing the upper lens 32 and the resin composition 60 for the lower lens in the gel state.

In the present polymerization of the present invention, the polymerization oven is preheated to 25° C. for 5 minutes, and then at 25 to 40° C. for 7 hours, at 40 to 50° C. for 3 hours, at 50 to 65° C. for 2 hours, and at 65 to 95° C. It is preferable to perform polymerization at 95 to 120°C for 1 hour, at 120°C for 2 hours, and at 120 to 70°C for 2 hours.

If the polymerization is performed outside the temperature conditions and time control, there is a problem in that a large number of defect rates occur due to bubbles and stains.

After the completion of the polymerization, the upper mold 10, the upper lens 34, the first protective film 42, the polarizing lens 40, the second protective film 44, and the lower lens stacked in order from the polymerization oven (64), take out the lower mold (50). Thereafter, the first tape 20 and the second tape 70 are removed, the upper mold 10 and the lower mold 50 are separated, washed, and heat-treated to manufacture the frequency polarizing lens 100.

In the method of manufacturing a power polarization lens using various molds according to the present invention, instead of making the polarized lens into a semi-lens and processing it to put the power, it is possible to directly insert the power and manufacture a finished power polarized lens, so that the semi-lens, which is a semi-finished lens ( Semi-finished lens) processing time and cost can be saved.

In addition, the present invention provides a power polarizing lens 100 using various molds manufactured by the above manufacturing method.

Hereinafter, the configuration and effects of the present invention will be described in more detail through examples. These examples are for illustrative purposes only, and the scope of the present invention is not limited by these examples.

A glass mold washed with pure water was used as the upper mold (10). As the upper mold 10, an upper mold capable of making an upper lens having a 4.25 curve was used. The convex portion of the upper mold 10 was placed downward and the concave portion of the upper mold 10 was placed upward, and a predetermined size higher than the thickness of the upper mold 10 was taped using a heat-resistant tape. Urethane monomer (KOC 6042 ^® from KOC Solution) 99.84% by weight, UV absorber (HIUV31A from KOC Solution) 0.03% by weight, release agent (HILUB UN from KOC Solution) 0.01% by weight and catalyst (HICAT DC from KOC Solution) 0.12% by weight Mixing and dissolving at 15° C. to make a homogeneous solution, and degassing the mixed solution at 1 Pa for 1 hour to prepare a resin composition 30 for an upper lens. 15g of the resin composition 30 for the upper lens was dropped by using an injection mechanism in the concave portion of the upper mold. A first protective film 42 was laminated to a thickness of 0.01 mm on the upper lens resin composition 30 placed in the upper mold recess. The first protective film 42 was prepared by stirring 85% by weight of a polyurethane resin, 10% by weight of an acrylic resin, and 5% by weight of methylene diphenyl diisocyanate for 10 minutes at 35°C. In the polyurethane resin, 40% by weight of a polyol, 30% by weight of a monomer diol, and 30% by weight of a diisocyanate are added, and 0.1 parts by weight of a catalyst is added to 100 parts by weight of the mixture of the polyol and the monomeric diol to react to prepare a prepolymer It was prepared by reacting at 85° C. for 1 hour while adding a chain extender to the prepolymer. A polarizing film 40 was laminated on the first protective film 42. A second protective film 44 was laminated on the polarizing film 40 to a thickness of 0.01 mm. The second protective film 44 was prepared by stirring 85% by weight of a polyester resin, 10% by weight of an acrylate resin, and 5% by weight of cyclohexylmethane diisocyanate for 10 minutes at 35°C. The upper mold 10 in which the resin composition 30 for the upper stove, the first protective film 42, the polarizing film 40, and the second protective film 44 are sequentially stacked is put into a polymerization oven and Preheating was performed for 5 minutes, and prepolymerization was performed at 15° C. for 6 hours, 15 to 60° C. for 4 hours, 60° C. for 10 hours, and 60 to 15° C. for 2 hours. After the pre-polymerization is completed, the upper lens 32, the first protective film 42, the polarizing film 40, and the second protection in a gel state formed by pre-polymerizing the resin composition 30 for the upper range from the polymerization oven After the upper mold 10 to which the film 44 is bonded was taken out, the convex portion of the upper mold 10 was placed upward and the second protective film 44 was placed downward. The upper mold 10 and the lower mold 50 were arranged to be spaced apart and taped using a heat-resistant tape. As the lower mold 50, a glass mold washed with pure water was used. As the lower mold 50, a lower mold capable of making a lower lens having a 5.75 curve was used. After removing a part of the heat-resistant tape incorporating the upper mold 10 and the lower mold 50, the resin composition for the lower range through the space spaced apart from the second protective film 44 and the lower mold 50 ( 60) was injected. In the resin composition 60 for the lower stove, 3 parts by weight of a sunscreen agent was mixed with 100 parts by weight of the resin composition 30 for the upper lens. The sunscreen was mixed with 60% by weight of benzotriazole and 40% by weight of 2-(2-hydroxy-5-t-octylphenyl)benzotriazole. The upper mold (10) in which the gel state of the upper lens (32), the first protective film (42), the polarizing film (40) and the second protective film (44) are combined, the resin composition for the lower range (60) And the lower mold 50 into a polymerization oven, preheated to 25°C for 5 minutes, 7 hours at 25-40°C, 3 hours at 40-50°C, 2 hours at 50-65°C, 65-95°C The polymerization was carried out at 3 hours, 95 to 120°C for 1 hour, 120°C for 2 hours, and 120 to 70°C for 2 hours. After the completion of the polymerization, the lower mold 50, the lower lens 64, the second protective film 44, the polarizing film 40, the first protective lens 42, and the upper lens stacked in order from the polymerization oven (34), After taking out the upper mold 10, the heat-resistant tape was removed, the upper mold 10 and the lower mold 50 were separated, washed, and heat treated to prepare a -1.50 diopter power polarization lens.

10: upper mold 20: first tape
30: resin composition for upper lens
32: upper lens in a gel state 34: upper lens
40: polarizing film
42: first protective film 44: second protective film
50: lower mold
60: resin composition for lower lens 64: lower lens
70: second tape 100: power polarization lens

Claims (6)

Taping the upper mold using a first tape (step 1);
Dropping a resin composition for an upper lens into the recessed portion of the upper mold (step 2);
Laminating a first protective film on the resin composition for an upper lens placed in the recessed portion of the upper mold (step 3);
Laminating a polarizing film on the first protective film (step 4);
Laminating a second protective film on the polarizing film (step 5);
Prepolymerizing the resin composition for the upper lens to form a gel-like upper lens (Step 6)
Disposing the upper and lower molds to be spaced apart from each other and taping them using a second tape (step 7);
Injecting a resin composition for a lower lens through a space between the second protective film and the lower mold (step 8); And
Polymerizing the resin composition for the upper lens and the lower lens in the gel state (step 9);
Including,
In step 1 above,
The upper mold is one selected from the group consisting of an upper mold capable of making an upper lens of 4.25 curve, an upper mold capable of making an upper lens of 3.00 curve, and an upper mold capable of making an upper lens of 1.50 curve. ,
In step 7 above,
The lower mold is a lower mold to make a 4.25 curve lower lens, a lower mold to make a 4.50 curve lower lens, a lower mold to make a 4.75 curve lower lens, and a lower mold to make a lower lens with 5.00 curve. Mold, a lower mold to make a 5.25 curve lower lens, a lower mold to make a 5.50 curve lower lens, a lower mold to make a 5.75 curve lower lens, a lower mold to make a 6.00 curve lower lens, Lower mold to make lower lens with 9.00 curve, lower mold to make lower lens with 9.25 curve, lower mold to make lower lens with 9.50 curve, lower mold to make lower lens with 9.75 curve, 10.00 curve Using any one selected from the group consisting of a lower mold capable of making a lower lens of 10.25 and a lower mold capable of making a lower lens of 10.25 curve,
A method of manufacturing a power polarization lens using various molds.
delete The method of claim 1, wherein in step 3,
The first protective film is prepared by stirring 80 to 90% by weight of a polyurethane resin, 5 to 15% by weight of an acrylic resin, and 1 to 10% by weight of methylene diphenyl diisocyanate at 30 to 35°C for 5 to 10 minutes,
The manufacturing method of the polyurethane resin,
Preparing a prepolymer by reacting a polyol with a monomer diol and a diisocyanate (S 1); And
Synthesizing a polyurethane resin by a chain extension reaction of the prepolymer by adding a chain extender to the prepolymer (S2);
Containing,
A method of manufacturing a power polarization lens using various molds.
The method of claim 1, wherein in step 5,
The second protective film is prepared by stirring 80 to 90% by weight of a polyester resin, 5 to 15% by weight of an acrylate resin, and 1 to 10% by weight of cyclohexylmethane diisocyanate at 30 to 35°C for 5 to 10 minutes. doing,
A method of manufacturing a power polarization lens using various molds.
delete The method of claim 1, wherein in step 8,
In the resin composition for the lower lens, 1 to 3 parts by weight of a sunscreen agent are mixed with 100 parts by weight of the resin composition for the upper lens,
The sunscreen comprises 50 to 60% by weight of benzotriazole and 40 to 50% by weight of 2-(2-hydroxy-5-t-octylphenyl)benzotriazole,
A method of manufacturing a power polarization lens using various molds.

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