KR101119631B1 - Gasket tape for lens mold and method for the same - Google Patents

Abstract

The present invention relates to a gasket tape for a lens mold and a method of manufacturing the same, a double film layer made of synthetic resin, a primer layer formed on the upper surface of the above-mentioned double film layer, an adhesive layer formed on the upper surface of the above-described primer layer and the above It comprises a release film layer formed on the upper surface of one pressure-sensitive adhesive layer.

The above-mentioned lens mold gasket tape is dried at 50 to 120 ° C., and is hardened for a long time using an oven, and exhibits no bubble or leakage due to no gap between the lens and the gasket tape during lens shrinkage.

Gasket, tape, lens, mold, polyethylene naphthalate, polyethylene terephthalate, polyethylene, polypropylene, polyimide

Description

Gasket tape for lens mold and manufacturing method {GASKET TAPE FOR LENS MOLD AND METHOD FOR THE SAME}

The present invention relates to a lens mold gasket tape and a method of manufacturing the same, and more particularly, to a lens mold gasket tape and a method of manufacturing the same, which does not generate a gap between the lens and the gasket tape during lens shrinkage and bubbles or leakage does not occur will be.

The present invention relates to a gasket tape for a lens mold and a method for manufacturing the same, comprising a double film layer, a primer layer, an adhesive layer and a release film layer, dried at 50 to 120 ℃, prepared by curing for a long time using an oven do.

Conventionally used lens mold gasket tape was manufactured to use a monomer composition having a high refractive index. In the case of the monomer composition having a high refractive index, shrinkage of about 15% occurs during the polymerization process. It is to be drawn into the space caused by the contraction of the lens to fill the space, if the gasket tape hardness is too high to fill the space, bubbles are generated.

In order to prevent this problem from occurring, currently used gasket tapes are laminated with polyethylene terephthalate films having a thickness of 12 μm and 25 μm, respectively, as a pressure-sensitive adhesive, and are twisted on the polyethylene terephthalate film so as to fill the space generated when the lens shrinks. Inducing the occurrence, the pressure-sensitive adhesive used a soft pressure-sensitive adhesive to be applicable when the lens shrinks.

However, the above-described method has a limit of distortion due to low elongation of the film made of polyethylene terephthalate, and due to the use of a soft adhesive, there is a problem in that the adhesive component is buried in the lens mold.

In order to solve the above problems, a flexible film such as polypropylene or polyethylene is used, and a thin film of fluorine-coated release film after drying at a temperature applicable to a low melting point material such as polypropylene or polyethylene at 50 to 120 ° C To provide a lens mold gasket tape and a method of manufacturing the same by laminating and applying a step of curing at least 30 hours at 30 to 180 ℃ using an oven.

Disclosure of Invention An object of the present invention is to provide a lens mold gasket tape and a method of manufacturing the same, in which no gap is generated between the lens and the gasket tape when the lens is contracted so that no bubbles or leakage occurs.

Another object of the present invention is to provide a gasket tape and a manufacturing method for which the adhesive component does not adhere to the lens mold.

An object of the present invention is a double film layer made of a synthetic resin, a primer layer formed on the upper surface of the double film layer, a pressure-sensitive adhesive layer formed on the upper surface of the primer layer and a release film layer formed on the upper surface of the pressure-sensitive adhesive layer It is achieved by providing a gasket tape for the lens mold, characterized in that it comprises.

According to a preferred feature of the present invention, the double film layer is formed of two selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyethylene, polypropylene and polyimide to a thickness of 6 to 100㎛ two films A backing layer made of polyethylene wax or a silicone releasing agent is formed on the lower surface of the laminate formed by bonding with a film adhesive to a thickness of 0.1 to 1.0 mu m.

According to a more preferred feature of the invention, the film adhesive is applied to a thickness of 0.1 to 1㎛, and comprises one selected from the group consisting of urethane, acrylic, polyester, epoxy and silicone.

According to a more preferred feature of the invention, the primer layer is formed to a thickness of 0.1 to 1㎛, made by adding a platinum catalyst and a vinyl functional silicone polymer to a mixture consisting of a silicone adhesive, a silicon gum (Gum) and a silicone resin Shall be.

According to a further preferred feature of the invention, the pressure-sensitive adhesive layer is formed to a thickness of 5 to 100㎛, mixed 0.2 to 2.0 parts by weight of benzoyl peroxide to 100 parts by weight of one synthetic resin selected from the group consisting of silicone, acrylic and epoxy It shall be made by.

According to an even more preferred feature of the present invention, the release film layer is formed to a thickness of 0.1 to 1㎛, it is to comprise a release film coated with a thin film of fluorine.

In addition, an object of the present invention is a double film layer forming step of bonding two films with a film adhesive, a primer layer forming step of applying a primer to the upper surface of the double film layer, the primer layer at a temperature of 50 to 120 ℃ 10 to 10 The first drying step of drying for 180 seconds, the pressure-sensitive adhesive layer forming step of applying an adhesive to the upper surface of the dried primer layer, the second drying to dry the laminate formed the pressure-sensitive adhesive layer for 30 to 600 seconds at 50 to 120 ℃ Step, a release film layer forming step of forming a release film on the upper surface of the pressure-sensitive adhesive layer, the first curing step of curing the laminate having the release film layer formed at a temperature of 30 to 70 ℃ for 1 to 3 days using an oven And a second curing step of curing the laminated body that has undergone the first curing step at an temperature of 80 to 180 ° C. for 1 to 2 days using an oven. It can be achieved by providing a method of manufacturing the same.

The lens mold gasket tape and the manufacturing method thereof according to the present invention exhibit an excellent effect of providing a lens mold gasket tape which does not generate a bubble or leakage due to no gap between the lens and the gasket tape when the lens is contracted.

In addition, it exhibits an excellent effect of providing a lens mold gasket tape and a method of manufacturing the same, in which residues of the adhesive component do not occur on the lens surface.

In the following, preferred embodiments of the present invention and the physical properties of each component will be described in detail, which is intended to explain in detail enough to be able to easily carry out the invention by one of ordinary skill in the art, This does not mean that the technical spirit and scope of the present invention is limited.

Lens mold gasket tape according to the present invention is a double film layer 10 made of a synthetic resin, a primer layer 20 formed on the upper surface of the above-mentioned double film layer 10, the upper surface of the primer layer 20 described above It comprises a pressure-sensitive adhesive layer 30 formed on the release film layer 40 formed on the upper surface of the pressure-sensitive adhesive layer 30 described above.

The above-described double film layer 10 is 6 to 100㎛ one selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (PE), polypropylene (PP) and polyimide (PI) The backing layer 13 made of polyethylene wax or a silicone releasing agent on the lower surface of the laminate formed by adhering two films 11 formed by forming a thickness of the film adhesive 12 to a thickness of 0.1 to 1.0 μm. Formed.

The above-described film adhesive 12 is applied between the two films 11 to a thickness of 0.1 to 1㎛, and comprises one selected from the group consisting of urethane, acrylic, polyester, epoxy and silicone, The double film layer 10 composed of components and thickness serves as a base material of the gasket tape for lens mold.

In addition, the volume of the lens manufacturing composition is solidified in the lens mold, and the volume is reduced, thereby generating a space between the lens mold and the lens composition.Curl is generated in the double film layer 10 of the gasket tape adhered to the lens mold gasket. As it is pushed into the mold, the space is filled and bubbles are suppressed.

In this case, a primer layer 20 is formed on the upper surface of the double film layer, and a backing layer 13 is formed on the lower surface to protect the double film 11, wherein the backing layer 13 is made of polyethylene wax. Or silicone release agent.

The above-described primer layer 20 is formed on the upper surface of the above-mentioned double film layer 10 to a thickness of 0.1 to 1㎛, platinum catalyst and vinyl function in a mixture made of a silicone adhesive, a silicon gum (Gum) and a silicone resin It is made by adding a silicone polymer, the primer layer 20 is formed on the upper surface of the double film layer 10 serves to help the adhesion of the pressure-sensitive adhesive layer 30 and the double film layer (10).

The pressure-sensitive adhesive layer 30 is formed on the upper surface of the above-described primer layer 20 to a thickness of 5 to 100㎛, benzoyl peroxide 0.2 to 100 parts by weight of one synthetic resin selected from the group consisting of silicone, acrylic and epoxy To 2.0 parts by weight, the pressure-sensitive adhesive layer 30 serves to adhere the double film layer 10 and the lens mold.

The above-mentioned release film layer 40 is formed in a thickness of 0.1 to 1㎛ on the upper surface of the above-described pressure-sensitive adhesive layer 30, and comprises a release film coated with a thin film of fluorine, the pressure-sensitive adhesive layer described above It protects against contaminants and blocks oxygen and is removed just before the winding process.

When the formation of the release film layer 40 described above is completed, the curing is performed using a curing oven, and when the curing process is completed, the release film layer 40 is removed while winding to manufacture a lens mold gasket tape.

In addition, the lens mold gasket tape according to the present invention is a double film layer forming step (S101) for bonding two films with a film adhesive, primer layer forming step (S103) for applying a primer on the upper surface of the double film layer (10). In the first drying step (S105) for drying the primer layer 20 at a temperature of 50 to 120 ° C. for 10 to 180 seconds, an adhesive layer forming step of applying an adhesive to the upper surface of the dried primer layer 20 ( S107), the second drying step (S109) for drying the laminate formed with the pressure-sensitive adhesive layer 30 for 30 to 600 seconds at 50 to 120 ℃, the release film for forming a release film on the upper surface of the pressure-sensitive adhesive layer 30 The first step of curing (S113) and the first step of curing (S113) to cure the laminate formed with the layer forming step (S111), the release film layer 40 at a temperature of 30 to 70 ℃ for 1 to 3 days using an oven. The second laminate to cure the laminate through the oven at a temperature of 80 to 180 ℃ 1 to 2 days Including temper step (S115) can be achieved by providing a method of manufacturing lens molds made gasket tape.

The above-described double film layer forming step (S101) is a step of bonding two films with a film adhesive, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (PE), polypropylene (PP) and polyimide Polyethylene wax or silicone release agent on the lower surface of the laminate formed by adhering two films 11 prepared by forming one selected from the group consisting of (PI) to a thickness of 6 to 100 μm with a film adhesive 12. It is made by forming a backing layer 13 made of 0.1 to 1.0㎛ thickness, the above-mentioned film adhesive 12 is made of urethane, acrylic, polyester, epoxy and silicon, and applied in a thickness of 0.1 to 1.0㎛ do.

The above-described primer layer forming step (S103) is a step of applying a primer on the upper surface of the double film layer 10, the primer layer 20 of 0.1 to 1㎛ thickness using a micro gravure coating method or Meyer bar coating method The aforementioned primer is made by adding a platinum catalyst and a vinyl functional silicone polymer mixture to a mixture consisting of a silicone adhesive, a silicone gum and a silicone resin.

The first drying step (105) is a step of drying the above-described primer layer 20, the primer layer 20 is applied and dried for 10 to 180 seconds at a temperature of 50 to 120 ℃ using an oven, The dried primer is cured to form the pressure-sensitive adhesive layer 30.

The above-described adhesive layer forming step (S107) is a step of applying an adhesive to the upper surface of the dried primer layer 20, using a comma coating method or a die coating method, 5 to 100㎛ The pressure-sensitive adhesive is formed by mixing 0.2 to 2.0 parts by weight of benzoyl peroxide to 100 parts by weight of one synthetic resin selected from the group consisting of silicone, acrylic and epoxy.

In this case, the benzoyl peroxide serves as a curing agent to impart tackiness by curing the pressure-sensitive adhesive made of one synthetic resin selected from the group consisting of silicone, acrylic and epoxy described above in the first and second curing steps (S113, S115). It plays a role.

The above-described second drying step (S109) is a step of drying the laminate in which the pressure-sensitive adhesive layer 30 is formed. Among the components constituting the double film layer 10, the film such as polypropylene or polyethylene has weak heat resistance, so (Duct) because it is melted during curing is made of a process of drying for 30 to 600 seconds at a temperature of 50 to 120 ℃ using an oven.

The above-described release film layer forming step (S111) is a step of forming a release film on the upper surface of the pressure-sensitive adhesive layer 30, the fluorine-coated thin film layer 40 is formed to a thickness of 0.1 to 1㎛ The release film layer 40 serves to protect the pressure-sensitive adhesive layer 30 from external contaminants or oxygen.

The first curing step (S113) described above is a step of curing the laminate having the release film layer 40 formed at a temperature of 30 to 70 ° C. for 1 to 3 days using an oven. Undried solvent contained in each layer which comprises a laminated body volatilizes through this.

The above-mentioned second curing step (S115) is a step of curing the laminate having undergone the above-mentioned first curing step (S113) at a temperature of 80 to 180 ℃ using an oven, such a second curing step ( The above-described pressure-sensitive adhesive layer 30 is cured through S115.

When winding the lens mold gasket tape manufactured through the second curing step (S115), if an inert gas such as nitrogen and argon is introduced between the wound gasket tape as necessary, the release film layer 40 is not formed. Oxygen is permeated to the side of the gasket tape to prevent the occurrence of nonuniformity of curing.

Hereinafter, a gasket tape and a manufacturing method for a lens mold according to the present invention will be described with reference to Examples.

≪ Example 1 >

Polyurethane adhesive is applied by applying 0.5 μm of a polyurethane adhesive between a 50 μm thick film made of polyethylene terephthalate and a 50 μm thick film made of polyethylene naphthalate. The backing layer is formed to a thickness of 0.5㎛, the upper surface of the double film is formed to a thickness of 0.5㎛, the platinum catalyst and the vinyl functional silicone polymer in a mixture consisting of a silicone adhesive, a silicon gum (Gum) and a silicone resin A primer layer formed by adding the mixture was formed, and the primer layer was dried at a temperature of 80 ° C. for 100 seconds, and a thickness of 50 μm was formed on the upper surface of the dried primer layer, and benzoyl peroxide 0.05 parts by weight of silicon was added. A pressure-sensitive adhesive layer formed by mixing parts by weight is formed, and the laminate on which the pressure-sensitive adhesive layer is formed is 300 seconds at 80 ° C. On the top surface of the dried, pressure-sensitive adhesive layer was formed a release film coated with a thin film of fluorine having a thickness of 0.5㎛, the laminate formed with the release film was cured for 2 days at a temperature of 50 ℃ using an oven, and cured The laminate was cured at 120 ° C. for 2 days using an oven to prepare a gasket tape for lens mold.

<Example 2>

Proceed in the same manner as in Example 1, 0.1 parts by weight of benzoyl peroxide was mixed to prepare a gasket tape for lens mold.

<Example 3>

Proceed in the same manner as in Example 1, 0.2 parts by weight of benzoyl peroxide was mixed to prepare a gasket tape for lens mold.

<Example 4>

Proceed as in Example 1, 0.5 parts by weight of benzoyl peroxide was mixed to prepare a gasket tape for the lens mold.

Example 5

Proceed in the same manner as in Example 1, 1.0 parts by weight of benzoyl peroxide was mixed to prepare a gasket tape for lens mold.

<Example 6>

Proceed in the same manner as in Example 1, by mixing 1.5 parts by weight of benzoyl peroxide to prepare a gasket tape for the lens mold.

<Example 7>

Proceed in the same manner as in Example 1, 2.0 parts by weight of benzoyl peroxide was mixed to prepare a lens mold gasket tape.

Comparative Example 1

A 0.5 μm thick backing layer made of polyethylene wax is formed on the lower surface of the 50 μm thick film made of polyethylene terephthalate, and a primer layer having a thickness of 0.5 μm is formed on the upper surface of the film. On the upper surface, a pressure-sensitive adhesive layer having a thickness of 50 μm was formed by mixing 0.05 parts by weight of benzoyl peroxide on 100 parts by weight of silicon to prepare a lens mold gasket tape.

Comparative Example 2

In the same manner as in Comparative Example 1, 0.1 parts by weight of benzoyl peroxide was mixed to prepare a lens mold gasket tape.

Comparative Example 3

In the same manner as in Comparative Example 1, 0.2 parts by weight of benzoyl peroxide was mixed to prepare a lens mold gasket tape.

<Comparative Example 4>

In the same manner as in Comparative Example 1, 0.5 parts by weight of benzoyl peroxide was mixed to prepare a gasket tape for lens mold.

Comparative Example 5

In the same manner as in Comparative Example 1, 1.0 parts by weight of benzoyl peroxide was mixed to prepare a gasket tape for lens mold.

Comparative Example 6

In the same manner as in Comparative Example 1, 1.5 parts by weight of benzoyl peroxide was mixed to prepare a gasket tape for lens mold.

&Lt; Comparative Example 7 &

In the same manner as in Comparative Example 1, 2.0 parts by weight of benzoyl peroxide was mixed to prepare a gasket tape for lens mold.

The residue test of the gasket tape prepared through Examples 1 to 7 and Comparative Examples 1 to 7 was carried out and shown in Table 1 below.

(However, in the residue test method, a lens mold gasket tape was attached to the glass surface, and when the residue amount was 30% or more at the time of peeling, X and 5% or more were indicated by Δ, and less than 5% by O.)

TABLE 1

As shown in Table 1 above, the lens mold gasket tape produced by the present invention exhibits the effect that the residue of the pressure-sensitive adhesive component does not occur on the adhesive surface with the lens.

1 is a cross-sectional view showing a gasket tape for a lens mold according to the present invention.

2 is a flow chart illustrating a method of manufacturing a lens mold gasket tape according to the present invention.

*** Description of the main parts of the drawings ***

10; Double film layer

11; film

12; Film adhesive

13; Backing layer

20; Primer layer

30; Adhesive layer

40; Release Film Layer

Claims (7)

A double film layer formed by bonding two films having different thicknesses and components made of synthetic resin with an adhesive; A primer layer formed on an upper surface of the double film layer; An adhesive layer formed on an upper surface of the primer layer; And Lens mold gasket tape comprising a release film layer formed on the upper surface of the pressure-sensitive adhesive layer. The method according to claim 1, The double film layer is formed by adhering two films prepared by forming one selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyethylene, polypropylene and polyimide to a thickness of 6 to 100 μm with a film adhesive. Gasket tape for lens mold, characterized in that to form a backing layer made of polyethylene wax or silicone release agent on the lower surface of 0.1 to 1.0㎛ thickness. The method according to claim 2, The film adhesive is applied to a thickness of 0.1 to 1㎛, the lens mold gasket tape, characterized in that comprises one selected from the group consisting of urethane, acrylic, polyester, epoxy and silicone. The method according to claim 1, The primer layer is formed to a thickness of 0.1 to 1㎛, lens mold gasket tape, characterized in that by adding a platinum catalyst and a vinyl functional silicone polymer to a mixture consisting of a silicone adhesive, a silicon gum (Gum) and a silicone resin. The method according to claim 1, The pressure-sensitive adhesive layer is formed to a thickness of 5 to 100㎛, lens mold gasket tape, characterized in that by mixing 0.2 to 2.0 parts by weight of benzoyl peroxide to 100 parts by weight of one synthetic resin selected from the group consisting of silicone, acrylic and epoxy. . The method according to claim 1, The release film layer is formed to a thickness of 0.1 to 1㎛, lens mold gasket tape, characterized in that the thin film coated with fluorine. A double film layer forming step of bonding two films having different thicknesses and components made of synthetic resin with an adhesive; A primer layer forming step of applying a primer on the upper surface of the double film layer; A first drying step of drying the primer layer at a temperature of 50 to 120 ° C. for 10 to 180 seconds; A pressure-sensitive adhesive layer forming step of applying a pressure-sensitive adhesive on the upper surface of the dried primer layer; A second drying step of drying the laminate in which the pressure-sensitive adhesive layer is formed for 30 to 600 seconds at 50 to 120 ° C .; A release film layer forming step of forming a release film on an upper surface of the pressure-sensitive adhesive layer; A first curing step of curing the laminate having the release film layer formed thereon at a temperature of 30 to 70 ° C. for 1 to 3 days using an oven; And And a second curing step of curing the laminated body having undergone the first curing step at an temperature of 80 to 180 ° C. for 1 to 2 days using an oven. 2.

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