KR20130128230A - Adhesive tape for casting plastic lens and method for casting plastic lens - Google Patents

Abstract

Provided is an adhesive tape (100) for molding a plastic lens and a method for molding a plastic lens which prevent bubbles and white turbidity caused by adhesives from being generated in the plastic lens. The adhesive tape for molding the plastic lens is a structure in which an adhesion layer (20) is formed in one side of tape base material (10). The adhesion layer comprises adhesives which include a mixture consisting of 80-95 mass% of addition reaction type silicon gluing agents and 5-20 mass% of peroxide curing type silicon gluing agents as a main ingredient and are formed by mixing effective cross-linking agents in the addition reaction type silicon gluing agents. The adhesives including the mixture as the main ingredient is thermally treated so that the content of dimethylpolysiloxane of trimer to eicosamer is less than 4850 ��per 1 g of the adhesives. The plastic lens is molded by using the adhesive tape for molding the plastic lens and a pair of molds. [Reference numerals] (10) Tape base material;(20) Adhesion layer

Description

Adhesive tape for plastic lens molding and plastic lens molding method {ADHESIVE TAPE FOR CASTING PLASTIC LENS AND METHOD FOR CASTING PLASTIC LENS}

Industrial Applicability The present invention relates to an adhesive tape for forming a plastic lens for use in manufacturing a plastic lens such as a high refractive index plastic spectacle lens or an optical lens, and a molding method for producing a plastic lens using the adhesive tape. It is about.

The conventional plastic lens is molded by a casting polymerization method using a pair of glass molds and a sealing tape for sealing, as disclosed in Patent Documents 1 and 2, for example. That is, the conventional plastic lens is manufactured as follows. First, a pair of glass molds are disposed to face each other at a predetermined interval, and the adhesive tape for sealing is adhered along the circumferential direction to the entire outer circumferential edge of the glass mold to open the gap between the glass molds. Seal continuously.

Next, the nozzle for resin injection is inserted into this adhesive tape, and liquid resin (polymerizable monomer) is inject | filled and filled in the space formed by a pair of glass mold and the adhesive tape for sealing. Then, a plastic lens is obtained by polymerizing and curing the resin by heating, light irradiation, or the like.

In such a conventional method of manufacturing a plastic lens, a low molecular weight siloxane (mainly a cyclic polyamide and a straight dimethyl polysiloxane) is eluted from the pressure-sensitive adhesive layer of the silicone-based adhesive tape for sealing. And mixed into the resin (polymerizable monomer) in some cases. Since the low molecular weight siloxane and the resin (polymerizable monomer) are difficult to mix uniformly and become a sea island shape, there is a fear that turbidity due to the low molecular weight siloxane may occur in the inner and outer peripheral edges of the plastic lens after curing. There was.

The silanol is also eluted in the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape for sealing, but if the polymerizable monomer is a mixture of polyisocyanate and polythiol, for example, the OH group and the polymerization of the silanol eluted from the pressure-sensitive adhesive layer at the time of lens molding polymerization. Since the NCO group of the polyisocyanate in the acidic monomer reacts to generate carbon dioxide, there is a fear that bubbles are generated in the outer peripheral portion of the plastic lens after curing.

Patent Literatures 2 and 3 propose a technique for suppressing the occurrence of clouding and bubbles of the plastic lens as described above, but both of these can not sufficiently suppress the occurrence of clouding and bubbles due to the adhesive by such a technique. Since there is a need for better improvement.

Japanese Unexamined Patent Publication No. Hei 1-257016 Japanese Unexamined Patent Publication No. 2003-193004 Japanese Unexamined Patent Publication No. 2001-316645

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide an adhesive tape for molding a plastic lens in which white cloudy and bubbles due to the adhesive do not occur in the plastic lens. Moreover, it is a subject further to provide the shaping | molding method of the plastic lens which does not generate | occur | produce the cloudiness and bubble which originate in an adhesive.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, as a result of earnest examination, the present inventors used the adhesive which has a mixture which mix | blended the addition reaction type silicone adhesive and the peroxide curable silicone adhesive in a specific ratio, and uses the said mixture as a main component. When the total amount of the low molecular weight siloxane (3- to 20-membered cyclic, linear dimethylpolysiloxane) contained therein is 4850 µg or less per 1 g of the pressure-sensitive adhesive containing the mixture as the main component, the sila from the pressure-sensitive adhesive containing the mixture as the main component Elution of play and low molecular weight siloxane into the polymerizable monomer of the plastic lens can be reduced, and the occurrence of clouding and bubbles of the molded lens can be suppressed, and the low molecular weight contained in the pressure sensitive adhesive containing the mixture as a main component The total amount of siloxanes (3- to 10-membered cyclic, linear dimethylpolysiloxanes) is the main When the pressure-sensitive adhesive to be equal to or less than 165㎍ per 1g of minutes, leading to the discovery of the ability to further suppress the white turbidity occurs and bubbles are generated in the molded lens, and devised the present invention.

The present invention has the following configuration. That is, the adhesive tape for molding a plastic lens according to the present invention adheres to the outer circumferential edges of a pair of molds disposed to face each other at predetermined intervals, seals the openings in the spaces formed between the molds, thereby polymerizing the plastic lens. In the adhesive tape for molding a plastic lens used to form a cavity filling a monomer, a tape-shaped base material and a pressure-sensitive adhesive layer for adhering the base material to the mold, the pressure-sensitive adhesive layer is added 3 in the adhesive which consists of an adhesive whose main component is a mixture which consists of 80 mass% or more and 95 mass% or less of reaction type silicone adhesive and 5 mass% or more and 20 mass% or less of a peroxide curable silicone adhesive, and makes the said mixture a main component Dimethyl polysiloxane content of more than 20 weights of a dimer is 4850 micrograms or less per 1g of adhesives which make the said mixture a main component It characterized.

In addition, the adhesive tape for molding a plastic lens according to the present invention adheres to the outer circumferential edges of a pair of molds disposed to face each other at predetermined intervals to seal the openings in the spaces formed between the molds, thereby polymerizing the plastic lens. In the adhesive tape for plastic lens molding used to form a cavity filled with a monomer, a tape-shaped base material and a pressure-sensitive adhesive layer for adhering the base material to the mold, the pressure-sensitive adhesive layer is an addition reaction type silicone pressure-sensitive adhesive It is comprised from the adhesive which has a mixture which consists of 80 mass% or more and 95 mass% or less, and the peroxide curable silicone adhesive 5 mass% or more and 20 mass% or less, and the trimer or more and 10-mer in the adhesive which has the said mixture as a main component The following dimethylpolysiloxane content is 165 micrograms or less per 1g of adhesives which have the said mixture as a main component, It shall be.

In addition, the adhesive tape for molding a plastic lens according to the present invention adheres to the outer circumferential edges of a pair of molds disposed to face each other at predetermined intervals to seal the openings in the spaces formed between the molds, thereby polymerizing the plastic lens. In the adhesive tape for plastic lens molding used to form a cavity filled with a monomer, a tape-shaped base material and a pressure-sensitive adhesive layer for adhering the base material to the mold, the pressure-sensitive adhesive layer is an addition reaction type silicone pressure-sensitive adhesive It is comprised from the adhesive which has a mixture which consists of 80 mass% or more and 95 mass% or less, and the peroxide curable silicone adhesive 5 mass% or more and 20 mass% or less, and the trimer or more and 10-mer in the adhesive which has the said mixture as a main component The following dimethylpolysiloxane content is 50 micrograms or less per 1g of adhesives which make the said mixture a main component, It shall be.

In addition, the plastic lens molding method according to the present invention is a method of manufacturing a plastic lens using the above-described adhesive tape for plastic lens molding according to the present invention, wherein a pair of molds are disposed to face each other at predetermined intervals A cavity forming step of adhering the adhesive tape for molding the plastic lens to the outer periphery of the molds to seal the opening in the space formed between the molds to form a cavity filled with the polymerizable monomer of the plastic lens; And a polymerization step of polymerizing the polymerizable monomer filled in the cavity, and the monomer filling step of charging the polymerizable monomer in the cavity.

When the adhesive tape for molding a plastic lens according to the present invention is used, whitening and bubbles due to the adhesive do not occur in the plastic lens at the time of manufacturing the plastic lens. Moreover, according to the shaping | molding method of the plastic lens by this invention, the white cloud and air bubble which originate in an adhesive do not arise in a plastic lens.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the structure of one Embodiment of the adhesive tape for plastic lens molding which concerns on this invention.
2 is a conceptual diagram illustrating an embodiment of a plastic lens molding method according to the present invention.
3 is a cross-sectional view showing the structure of another embodiment of the adhesive tape for molding a plastic lens according to the present invention.
4 is a GC-FID (Gas Chromatography with Hydrogen Ionization Detector) analysis chart of low molecular weight siloxane.

EMBODIMENT OF THE INVENTION Embodiment of the adhesive tape for plastic lens molding and the plastic lens molding method by this invention is described in detail, referring drawings. FIG. 1: is sectional drawing (sectional drawing cut in the plane orthogonal to the longitudinal direction of a tape) of the plastic lens molding adhesive tape of this embodiment, and FIG. 2 is a figure explaining the plastic lens molding method of this embodiment. In addition, in each subsequent figure, the same code | symbol is attached | subjected to the same or corresponding part.

As shown in FIG. 1, the adhesive tape 100 for plastic lens molding of the present embodiment is formed on almost the entire surface of one side of a tape-shaped substrate (hereinafter sometimes referred to as a tape substrate) 10. It has a structure in which the adhesion layer 20 which sticks this to the mold 30 and 30 is formed.

Next, a method of molding a plastic lens using the adhesive tape 100 for molding the plastic lens will be described.

First, as shown in Fig. 2, for example, a pair of molds 30 and 30, each having a substantially disk shape, is disposed to face each other at predetermined intervals, and then a plastic lens is formed on the outer periphery of both molds 30 and 30. The adhesive pressure-sensitive adhesive tape 100 is wound around the circumferential direction and adhesively sealed to continuously seal the openings formed between the molds 30 and 30 while maintaining the gap. As a result, as shown in FIG. 2, the molds 30 and 30 are connected in parallel to each other, and a plate-like or cylindrical cavity C is partitioned therebetween (cavity forming step).

Then, when such a cavity C is formed, as shown in FIG. 2, one end of the adhesive tape 100 for plastic lens molding is peeled off, a gap is opened, and a nozzle not shown in the cavity C is inserted from the gap. Put it in. After filling and filling a liquid resin (polymerizable monomer) into the cavity C from the nozzle, the gap is further closed with the adhesive tape 100 for plastic lens molding (monomer filling step).

As the resin (polymerizable monomer), a mixture of m-xylylene diisocyanate and pentaerythritol tetrakismercaptopropionate or a mixture of m-xylylene diisocyanate and bis (mercaptoethyl) trithioglycerine Although etc. are used, it is not specifically limited to these.

After that, a fixing jig (not shown) is mounted to fix the molds 30 and 30 so that the gap does not change. Since the molds 30 and 30 are fixed by the fixing jig, even if the internal pressure of the cavity C changes, the interval does not change, and a constant interval is always maintained. And the resin (polymerizable monomer) in the cavity (C) is polymerized by heating or light irradiation and cured (polymerization step). After the resin (polymerizable monomer) has sufficiently cured, the adhesive tape 100 for molding the plastic lens is peeled off to remove the molds 30 and 30, thereby obtaining a plastic lens.

In such an adhesive tape 100 for plastic lens molding, the adhesive layer 20 is a mixture comprising 80% by mass to 95% by mass of an addition-reactive silicone adhesive and 5% by mass to 20% by mass of a peroxide curable silicone adhesive. It consists of an adhesive which makes a main component and mixes 0.12 mass part or more and 0.20 mass part or less effective in the said addition reaction type silicone adhesive with respect to 100 mass parts of this mixture.

Since the adhesive layer 20 has sufficient adhesive force, resin (polymerizable monomer) is injected into the cavity C formed by the adhesive tape 100 for plastic lens molding and the pair of molds 30 and 30. When it does so, resin (polymerizable monomer) can be reliably sealed in cavity C so that the resin (polymerizable monomer) may not leak.

In addition, the peroxide curable silicone pressure sensitive adhesive contains silanol and low molecular weight siloxane (mainly 3 to 20 cyclic cyclic and / or linear dimethylpolysiloxanes) as impurities, but such impurities are eluted from the adhesive layer 20 to form a resin. In order to mix | blend with a (polymerizable monomer), in the past, there existed a possibility that the above-mentioned haze and air bubbles generate | occur | produce in the inner and outer peripheral edges of the plastic lens after hardening.

However, the adhesive used for the adhesive tape 100 for plastic lens molding of this embodiment has a low ratio of the peroxide curable silicone adhesive in the mixture of the addition-reactive silicone adhesive and the peroxide curable silicone adhesive to 20% by mass or less. Therefore, firstly, the elution amount of silanol is small. Thus, no bubbles are generated in the inner and outer circumferences of the plastic lens after curing.

Secondly, the pressure-sensitive adhesive used in the adhesive tape 100 for molding a plastic lens of the present embodiment is subjected to a process to be described later, for example, the content of the low molecular weight siloxane of the 3 to 20-mer in the pressure-sensitive adhesive. Since it is set to 4850 micrograms or less per 1 g of adhesives which make the said mixture a main component, the elution amount of low molecular weight siloxane (mainly 3-20 monomer cyclic and / or linear dimethylpolysiloxane) is reduced significantly. Therefore, turbidity does not occur in the inner and outer peripheral portions of the plastic lens after curing.

The treatment for reducing the content of the low molecular weight siloxane in the pressure-sensitive adhesive used for the plastic lens molding pressure-sensitive adhesive tape 100 of the present embodiment may be performed on at least the peroxide-curable silicone pressure-sensitive adhesive in the peroxide-curable silicone pressure-sensitive adhesive and the addition-reactive silicone pressure-sensitive adhesive. There is a need. Although the method of the treatment which reduces content of the low molecular weight siloxane in a peroxide curable silicone adhesive is not specifically limited, The raw material of a peroxide curable silicone adhesive or a peroxide curable silicone adhesive heat-processes or depressurizes and volatilizes a low molecular weight siloxane. The method of making it reduce is preferable.

The amount of the low molecular weight siloxane is 3 to 20 in the chart of quantitative analysis using the GC-FID apparatus shown in FIG. 4 (Dn in FIG. 4 (an integer of n = 3 to 20 represents an n monomer of low molecular weight siloxane)). The amount of dimethylpolysiloxane in the dimer is 4850 µg or less per 1 g of the pressure sensitive adhesive containing the mixture as a main component, preferably the amount of dimethylpolysiloxane in the amount of 3 to 10 monomers is 165 µg or less, and more preferably the amount of dimethylpolysiloxane of 3 to 10 monomers. The amount is preferably 50 µg or less, i.e., an amount in which the occurrence of cloudiness is sufficiently suppressed. In addition, dimethyl polysiloxane may be cyclic or linear, and the quantity of the said dimethyl polysiloxane is the sum total of cyclic dimethyl polysiloxane and linear dimethyl polysiloxane.

As a method of volatilizing and reducing the low molecular weight siloxane, for example, (1) silicone gum or MQ (M unit: (CB ₃ ) ₃ SiO _1/2 , Q unit: SiO ₂ forming a silicone adhesive) ) Reducing the resin by hot stirring or kneading (pressure reducing strip) in a step of raw material under reduced pressure in advance to volatilize the low molecular weight siloxane, (2) mixing a silicone gum or MQ resin to prepare a base adhesive A method of reducing treatment by applying heat under reduced pressure or normal pressure to volatilize the low molecular weight siloxane, or (3) applying a heat in the coating and drying step of the silicone pressure-sensitive adhesive solution to the base material, thereby reducing the low molecular weight siloxane. The method of reducing process by volatilizing from an adhesion layer, etc. are mentioned. It is also possible to combine these treatment methods. In consideration of productivity and cost, a treatment method substantially corresponding to (3) is most preferable in that the pressure-sensitive adhesive can be expanded into a web shape to efficiently volatilize low molecular weight siloxane. By performing these treatments, the elution amount of the low molecular weight siloxane from a silicone adhesive can be reduced. Therefore, turbidity does not occur in the inner and outer peripheral portions of the plastic lens after curing.

Although the temperature at the time of the process which reduces the quantity of low molecular weight siloxane is not specifically limited, At the time of the lens forming, above the polymerization temperature of resin (polymerizable monomer), especially at the maximum temperature reached at the time of polymerization or more Heat treatment is preferred. By this heat treatment, the low molecular weight siloxane can be volatilized from the silicone pressure sensitive adhesive. Although the temperature of heat processing changes with kinds of resin (polymerizable monomer), 130 degreeC or more is preferable, 150 degreeC or more is more preferable, and 180 degreeC or more is more preferable. In addition, at the temperature exceeding 200 degreeC, depending on a processing time, the main chain of organopolysiloxane may be cut | disconnected and the low molecular weight siloxane may increase rather, but it is described in the processing method of said (3). Since there is a possibility of deformation, the upper limit is preferably 200 ° C.

Moreover, conditions other than the temperature at the time of heat processing, for example, processing time and atmosphere (type of atmosphere gas, atmospheric pressure, and airflow rate) are not specifically limited, either, The heat treatment conditions are three to three in the adhesive which has the said mixture as a main component. The amount of the dimethylpolysiloxane of 20-mers is 4850 µg or less per 1 g of the pressure sensitive adhesive containing the mixture as a main component, preferably the amount of the dimethylpolysiloxane of 3 to 10-mer weight is 165 µg or less per 1 pressure-sensitive adhesive containing the mixture as a main component. Preferably, the amount of the dimethylpolysiloxane in the range of 3 to 10 dimers is set to be 50 µg or less per gram of the pressure sensitive adhesive containing the mixture as a main component, that is, the generation of turbidity is sufficiently suppressed. In addition, when this process is not performed, the quantity of the low molecular-weight siloxane (3--20 monomer dimethylpolysiloxane) becomes more than 4850 micrograms per 1g of adhesives which have the said mixture as a main component.

In addition, the timing which performs the process which reduces the quantity of low molecular weight siloxane with respect to an adhesive is not specifically limited, You may perform to the independent peroxide curable silicone adhesive before mixing with an addition reaction type silicone adhesive, and addition reaction type silicone You may carry out to the mixture of an adhesive and a peroxide curable silicone adhesive, and you may carry out after mixing the said crosslinking agent with this mixture. That is, the said process may be performed at the stage of the raw material of an adhesive, and the said process may be performed with respect to the completed adhesive. In addition, when the adhesive solution is coated on the tape base material 10 to form the adhesive layer 20, or after completion of the adhesive layer 20, the treatment may be performed. Especially, since the low molecular weight siloxane is reduced not only in a peroxide curable silicone adhesive but also an addition reactive silicone adhesive, the method of heat-processing in the state which mixed the addition reaction type silicone adhesive and the peroxide curable silicone adhesive is more preferable.

In this way, when the plastic lens is manufactured using the adhesive tape 100 for molding the plastic lens of the present embodiment, since white turbidity and air bubbles do not occur at the inner and outer circumferences of the plastic lens after curing, the plastic lens is produced with good yield. It can manufacture.

In addition, in this embodiment, although the adhesion layer 20 was formed in the whole one side (adhesive surface) of the tape base material 10, as shown in FIG. 3, each mold 30 and 30 in the tape base material 10 is shown. The pressure-sensitive adhesive layer 20 may be formed only in a region (both sides) that adheres to the substrate. With such a configuration, the amount of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 20 can be reduced, and the elution in the low molecular weight siloxane or silanol monomer in the pressure-sensitive adhesive can be suppressed, and a part of the pressure-sensitive adhesive is applied to the molded article. The defect of being attached does not occur either.

Below, the tape base material 10, the adhesion layer 20, and the silicone adhesive which is a raw material of an adhesive (namely, an addition reaction type silicone adhesive, a peroxide hardening type) which comprise the adhesive tape 100 for plastic lens molding of this embodiment Silicone adhesive) and a crosslinking agent are demonstrated in detail.

Although addition reaction type silicone adhesive is not specifically limited, For example, KR3700, KR3701, X-40-3237-1, X-40-3240, which are manufactured by Shin-Etsu Chemical Co., Ltd., X-40-3291-1, X-40-3229, X-40-3270, X-40-3306 and TSR1512, TSR1516, XR37-B9204 which are products made by Momentive Performance Materials, Toray Dow Corninga And SD4584, SD4585, SD4560, SD4570, SD4600PFC, and D4593, which are available from Bushi-Kaisha.

In addition, although a peroxide curable silicone adhesive is not specifically limited, For example, KR100, KR101-10 by Shin-Etsu Chemical Co., Ltd., YR3340, YR3286, PSA610-SM, which are manufactured by Momentive Performance Materials, XR37-B6722 and SH4280 by Toray Dow Corning Co., Ltd. are mentioned.

Although the mixture of an addition reaction type silicone adhesive and a peroxide curable silicone adhesive consists of 80 mass% or more and 95 mass% or less of an addition reaction type silicone adhesive, and 5 mass% or more and 20 mass% or less of a peroxide curable silicone adhesive, However, a peroxide curable silicone adhesive If the ratio of more than 20 mass% (that is, if the proportion of the addition-responsive silicone adhesive is less than 80 mass%), the ratio of the peroxide curable silicone adhesive is too large, so the amount of silanol and low molecular weight siloxane eluted increases. Bubbles and turbidity are likely to occur at the inner and outer circumferential edges of the plastic lens.

On the other hand, when the ratio of the peroxide curable silicone pressure sensitive adhesive is less than 5% by mass (that is, the ratio of the addition reaction type silicone pressure sensitive adhesive is more than 95% by mass), the adhesive force of the adhesive layer 20 becomes insufficient, and the adhesive tape for plastic lens molding It becomes difficult to maintain the space | interval between both molds 30 and 30 by (100), and there exists a possibility that the notch of a lens peripheral part by liquid leakage of a polymerizable monomer may generate | occur | produce. In addition, since the surface of the plastic lens and both molds (30, 30) is likely to cause debris, there is a need to polish the outer peripheral portion of the plastic lens or to remove and clean the paste of the mold (30). There is a risk of deterioration. In particular, since the polymerization temperature of the polymerizable monomer when producing a high refractive lens having a refractive index of 1.60 or more becomes 130 ° C or higher, in order to give the adhesive layer 20 an adhesive force capable of maintaining the gap even under such a high temperature, a peroxide It is necessary to use at least 5 mass% of a curable silicone adhesive.

Moreover, in the adhesive which has a mixture of the addition reaction type silicone adhesive of this invention and a peroxide curable silicone pressure sensitive adhesive as a main component, the crosslinking agent effective only to an addition reaction type adhesive is added and mixed in order to balance the adhesive characteristic. Although the crosslinking agent effective for an addition reaction type silicone adhesive is not specifically limited, For example, X-92-122 which is a Shin-Etsu Chemical Co., Ltd. product, CR50 which is a product made by Momentive Performance Materials, and Toray, Inc. Dow Corning, Inc., BY24-741.

It is preferable to mix the crosslinking agent effective for an addition reaction type silicone adhesive at 0.12 mass part or more and 0.20 mass part or less with respect to 100 mass parts of said mixtures. If it is less than 0.12 mass part, the adhesive force of an adhesive may become inadequate at the time of superposition | polymerization of a polymerizable monomer, and there exists a possibility that the said space | interval cannot be maintained. As a result, liquid leakage occurs from the cavity (C) by expansion of the polymerizable monomer, and there is a fear that notches occur in the obtained plastic lens.

On the other hand, if it is more than 0.20 parts by mass, the adhesive force of the pressure-sensitive adhesive is too strong, so even if the polymerizable monomer shrinks at the time of polymerization of the polymerizable monomer, the above gap is maintained. It is pulled toward the radial center side. As a result, wrinkles may occur in the adhesive tape 100 for plastic lens molding, and lens wrinkles may enter the outer circumferential surface of the plastic lens.

Next, although the material of the base material 10 is not specifically limited, The material which has a polyethylene terephthalate as a main component is optimal. However, the present invention is not limited thereto, and other materials may be used.

For example, metal foils, such as stainless steel and soft aluminum, polybutylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, biaxially stretched polypropylene, polyimide, aramid, polycycloolefin, and fluororesin resin resin films Can also be used. Moreover, the composite film which laminated the aluminum foil and the resin film, and the composite film which laminated the film and resin film which formed the metal oxide thin film, such as alumina and silicon dioxide, on the surface of a resin film, can also be used.

When polyethylene terephthalate is used as the tape base material 10, it is preferable to make the thickness into the range of 20 micrometers or more and 75 micrometers or less. If it is less than 20 micrometers, since the rigidity of the base material 10 is low, there exists a possibility that the space | interval between two molds 30 and 30 cannot be maintained. In addition, the resin (polymerizable monomer) does not resist the force to expand, cracks, cuts, etc., the air does not penetrate into the cavity (C) or the resin (polymerizable monomer) is reduced in the width direction without resisting the force to shrink There is a risk of causing tape wrinkles. On the other hand, when it exceeds 75 micrometers, since the rigidity of the base material 10 is high, there exists a possibility that elasticity may fall. In addition, a gap may occur in the wrap portion of the adhesive tape 100 for plastic lens molding, and liquid leakage of the resin (polymerizable monomer) may occur.

As a manufacturing method of the adhesive tape 100 for plastic lens shaping | molding, the crosslinking agent effective for an addition reaction type silicone adhesive is added to the adhesive solution which melt | dissolved the addition reaction type silicone adhesive and the peroxide curable silicone adhesive in organic solvents, such as toluene and xylene, After coating this solution with the comma coater, a lip coater, etc. so that the thickness of the adhesion layer 20 after drying may be made to the base material 10, the method of drying and hardening at predetermined temperature is mentioned. As needed, you may provide an anchor process layer between the adhesion layer and the base material 10.

However, the manufacturing method of the adhesive tape 100 for plastic lens shaping | molding is not limited to the above method, All the normal manufacturing methods employ | adopted in order to form a silicone adhesive layer in a base material can be employ | adopted. In addition, if the temperature and the like are set at appropriate conditions, the amount of the low molecular weight siloxane can be reduced by heat treatment at the time of drying and curing. You may manufacture the adhesive which comprises the adhesion layer 20 by melt | dissolving.

The thickness of the adhesion layer 20 is the range of 10 micrometers or more and 35 micrometers or less normally. If it is less than 10 micrometers, adhesive strength with the overlapping part of the adhesive tape 100 for plastic lens shaping | molding, and the mold 30 will become inadequate, and liquid leakage and air invasion will occur easily. Moreover, when it is more than 35 micrometers, the total thickness of the adhesive tape 100 for plastic lens shaping | molding will become too thick, and a clearance gap will fall easily in a wrap part. In addition, the amount of elution of low molecular weight materials (silanol and low molecular weight siloxane) from the adhesive layer 20 also increases, and in addition to the occurrence of cloudiness and bubbles in the plastic lens, the treatment of reducing the amount of low molecular weight siloxane is carried out. The amount of low molecular weight siloxane is difficult to reduce.

Although the plastic lens is manufactured using such a plastic lens molding adhesive tape 100, the shape, material, etc. of the mold 30 used at that time are not specifically limited. In general, however, one made of glass (silicon dioxide) having a disc shape or one made of metal is often used.

Moreover, the kind of resin (polymerizable monomer) used as a raw material of a plastic lens is not specifically limited, either. In the case of spectacle lenses, conventionally known materials are used. For example, spectacle lenses having an ultra high refractive index (1.65≤Ne) are episulfide resins (Mitsui Chemical Co., Ltd.). Monomers such as MR-174, IU-20, manufactured by Mitsubishi Gas Chemical Co., Ltd., and a thiourethane-based resin (MR-7, Mitsui Chemical Co., Ltd.) are used.

In addition, in the case of spectacle lenses having a high refractive index (1.58≤Ne <1.65), thiourethane-based resins (MR-6 manufactured by Mitsui Chemicals, MR-8 manufactured by Mitsui Chemicals) and polyester meta Acrylates (TS-26, manufactured by Tokuyama Co., Ltd.), and monomers of polycarbonate (Panlite, manufactured by Teijin Chemical Co., Ltd.). In addition, in the case of spectacle lenses having a medium refractive index (1.55≤Ne <1.58), urethane methacrylate (K-23 manufactured by Kureha Co., Ltd.) and epoxy methacrylate (MCR-50 manufactured by Mitsubishi Rayon Co., Ltd.) Monomers such as dialkyl carbonate (HIRI manufactured by PPG Industries) and diallyl phthalate-based resin (NK-55 manufactured by Nichi Oil Chemical Co., Ltd.).

In addition, in the case of a low refractive index (Ne <1.55) spectacle lens, urethane resin (TRIVEX, made by PPG Industries), urethane methacrylate (MCR-10 manufactured by Mitsubishi Rayon Co., Ltd.), methacrylate (BKK) Monomers such as K-55 (Kureha), allyl diglycol carbonate (CR-39 from PPG Industries), diallyl carbonate (CR-607 from PPG Industries), and polymethyl methacrylate (methyl polymethacrylate) Can be used.

Quantification of the low molecular weight siloxane contained in the adhesive of the adhesive tape for plastic lens molding of the present invention was carried out by the following method using a GC-FID (Gas Chromatography with Hydrogenation Ionization Detector) apparatus. First, as a pretreatment of the sample, 0.25 g of a finely cut adhesive tape sample was immersed in 10 ml of acetone (containing 20 µg / ml of n-tetradecane as an internal standard) and left to stand at room temperature for 24 hours after being sealed.

Subsequently, the obtained immersion liquid was used as a test liquid, and the quantitative measurement of the low molecular weight siloxane was performed using 7890A by the GC-FID (Gas Chromatography with Hydrogen Ionization Detector) apparatus Agilent Technologies. The column used was DB-5 (30 m in length, 0.25 mm in inner diameter, 0.25 micrometer in thickness) which is a J & W product. The column temperature was hold | maintained at 50 degreeC for 5 minutes, and it heated up to 300 degreeC at the temperature increase rate of 10 degreeC / min, and hold | maintained at 300 degreeC for 60 minutes. The injection port temperature was 300 ° C., the detector temperature was 300 ° C., the carrier gas was He, the injection method was the Pulsed Splitless method, and the injection amount of the test solution was 1 μl.

The amount of each of the low molecular weight siloxanes of 3 to 20 monomers contained in the pressure sensitive adhesive containing the mixture as a main component was calculated by converting the peak area, respectively, using n-tetradecane (n-C14) as a standard substance. The result obtained at this time is the mass of the low molecular weight siloxane contained per mass of the adhesive which has the said mixture as a main component which reduced the mass of the base material in a sample. The relative sensitivity of the low molecular weight siloxane with n-tetradecane was set to 2.62.

[Example]

The structure of the adhesive tape for plastic lens molding of this invention is demonstrated concretely by an Example. However, the adhesive tape for molding a plastic lens of the present invention is not limited thereto.

Example 1

95 parts by mass of the addition-responsive silicone adhesive (SD-4560, manufactured by Toray Dow Corning Co., Ltd.), 5 parts by mass of the peroxide-curable silicone adhesive (KR-130, manufactured by Shin-Etsu Chemical Co., Ltd.), and the addition-responsive silicone 0.12 parts by mass of a crosslinking agent (X-92-122, available from Shin-Etsu Chemical Co., Ltd.) effective for the pressure-sensitive adhesive was uniformly stirred and mixed in toluene to prepare a pressure-sensitive adhesive solution. The pressure-sensitive adhesive solution was coated on a polyester (PET) film base material (thickness 50 µm) manufactured by Toray Industries, Ltd. so that the pressure-sensitive adhesive layer had a thickness of 20 µm, and initially dried at 40 to 90 ° C in the first half of the drying furnace. . Then, it dried for 1 minute in the zone where the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 180 degreeC, and obtained the adhesive tape for plastic lens shaping | molding of a total thickness of 70 micrometers (it may describe later as adhesive tape). .

As shown in Table 1, the plastic lens produced using this adhesive tape is molded at a maximum temperature of 145 ° C at the time of polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). Less than 5 µg of sugar (below the detection limit) and 3 to 20 monomers were 3632 µg per 1 g of the adhesive containing the mixture as a main component. In addition, the obtained plastic lens was a good-quality lens which did not produce whitening (whitening of the lens) and bubble mixing, had no liquid leakage, and did not need polishing of the lens peripheral portion or cutting of the lens surface. Therefore, it can be said that this adhesive tape has the characteristic required for lens shaping.

[Example 2]

80 parts by mass of the addition-responsive silicone adhesive (TSR1512 manufactured by Momentive Performance Materials), 20 parts by mass of the peroxide-curable silicone adhesive (SH4280 PSA manufactured by Toray Dow Corning Co., Ltd.), and the addition-response silicone 0.15 mass part of crosslinking agents (BY24-741 made from Toray Dow Corning Co., Ltd.) effective for an adhesive were stirred and mixed uniformly in toluene, and the adhesive solution was produced. The pressure-sensitive adhesive solution was coated on a PET film base material (thickness of 24 μm) manufactured by Teijin DuPont Co., Ltd. so that the pressure-sensitive adhesive layer had a thickness of 20 μm, and initially dried at 40 to 90 ° C. in the first half of the drying furnace. Then, it dried for 3 minutes in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 180 degreeC, and obtained the adhesive tape for plastic lens molding of 44 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using the adhesive tape is molded at a maximum temperature of 140 ° C. during the polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). 48 micrograms per sugar and 3-20 dimers were 4512 micrograms per 1 g of adhesives which have the said mixture as a main component. Moreover, the obtained plastic lens was a good-quality lens which did not produce whitening (cloudy of a lens) and bubble mixing, had no liquid leakage, and was unnecessary for grinding | polishing of the lens peripheral part and cutting of the lens surface. Therefore, it can be said that this adhesive tape has the characteristic required for lens shaping.

[Example 3]

80 mass parts of addition reaction type silicone adhesive (SD-4560 by Toray Dow Corning Co., Ltd.), 20 mass parts of peroxide-curable silicone adhesive (SH4280 PSA made by Toray Dow Corning Co., Ltd.), said addition reaction type 0.15 parts by mass of a crosslinking agent (BY24-741 manufactured by Toray Dow Corning Co., Ltd.) effective for silicone pressure sensitive adhesive was uniformly stirred and mixed in toluene to prepare an adhesive solution. This adhesive solution was coated on PET film base material (thickness 24micrometer) made from Teijin Dupont Co., Ltd. so that the adhesive layer thickness might be set to 20 micrometers, and it initially dried at 40-90 degreeC in the front part of a drying furnace. Then, it dried for 5 minutes in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 130 degreeC, and obtained the adhesive tape for plastic lens molding of 44 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using the adhesive tape is molded at a maximum temperature of 125 ° C. during the polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). 158 µg of sugar and 3 to 20 monomers were 4432 µg per 1 g of the adhesive containing the mixture as a main component. Moreover, the obtained plastic lens was a good-quality lens which did not produce whitening (cloudy of a lens) and bubble mixing, had no liquid leakage, and was unnecessary for grinding | polishing of the lens peripheral part and cutting of the lens surface. Therefore, it can be said that this adhesive tape has the characteristic required for lens shaping.

Example 4

80 mass parts of addition reaction type silicone adhesive (SD-4560 by Toray Dow Corning Co., Ltd.), 20 mass parts of peroxide-curable silicone adhesive (SH4280 PSA made by Toray Dow Corning Co., Ltd.), said addition reaction type 0.15 parts by mass of a crosslinking agent (BY24-741 manufactured by Toray Dow Corning Co., Ltd.) effective for silicone pressure sensitive adhesive was uniformly stirred and mixed in toluene to prepare an adhesive solution. The pressure-sensitive adhesive solution was coated on a PET film base material (thickness of 24 μm) manufactured by Teijin DuPont Co., Ltd. so that the pressure-sensitive adhesive layer had a thickness of 20 μm, and initially dried at 40 to 90 ° C. in the first half of the drying furnace. Then, it dried for 5 minutes in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 150 degreeC, and obtained the adhesive tape for plastic lens molding of 44 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using the adhesive tape is molded at a maximum temperature of 120 ° C. during the polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). 97 µg of sugar and 3 to 20 monomers were 3925 µg per 1 g of the adhesive containing the mixture as a main component. Moreover, the obtained plastic lens was a good-quality lens which did not produce whitening (cloudy of a lens) and bubble mixing, had no liquid leakage, and was unnecessary for grinding | polishing of the lens peripheral part and cutting of the lens surface. Therefore, it can be said that this adhesive tape has the characteristic required for lens shaping.

[Example 5]

90 mass parts of addition reaction type silicone adhesive (SD4560 by Toray Dow Corning Co., Ltd.), 10 mass parts of peroxide-curable silicone adhesive (KR 130 made by Shin-Etsu Chemical Co., Ltd.), silicone of the said addition reaction type 0.20 mass part of crosslinking agent (BY24-741 made from Toray Dow Corning Co., Ltd.) effective for an adhesive was stirred uniformly in toluene, and the adhesive solution was produced.

The pressure-sensitive adhesive solution was coated on an aluminum / polyester film composite substrate (thickness 20 µm) manufactured by Asia Aluminum Corporation so that the pressure-sensitive adhesive layer had a thickness of 20 µm, and initially dried at 40 to 90 ° C in the first half of the drying furnace. Then, it dried for 3 minutes in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 150 degreeC, and obtained the adhesive tape for plastic lens molding of 40 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using the adhesive tape is molded at a maximum temperature of 140 ° C. during the polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). 160 micrograms per sugar and 3-20 dimers were 4790 micrograms per 1 g of adhesives which have the said mixture as a main component. In addition, although some whitening (cloudy of a lens) was confirmed in the outer peripheral part in the lens shaping | molding of the obtained plastic lens, a good lens was obtained by grind | polishing the lens peripheral part without bubble mixing, no liquid leakage.

Comparative Example 1

96 parts by mass of the addition-responsive silicone adhesive (SD-4560, manufactured by Toray Dow Corning Co., Ltd.), 4 parts by mass of the peroxide-curable silicone adhesive (KR-130, manufactured by Shin-Etsu Chemical Co., Ltd.), and the addition-responsive silicone 0.10 mass part of the crosslinking agent (X-92-122 which is a Shin-Etsu Chemical Co., Ltd. product) effective for an adhesive was stirred uniformly in toluene, and the adhesive solution was produced.

The pressure-sensitive adhesive solution was coated on a polyester (PET) film base material (thickness 50 µm) manufactured by Toray Industries, Ltd. so that the pressure-sensitive adhesive layer had a thickness of 20 µm, and initially dried at 40 to 90 ° C in the first half of the drying furnace. . Then, it dried for 1 minute in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 180 degreeC, and obtained the adhesive tape for plastic lens molding of 70 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using this adhesive tape is molded at a maximum temperature of 145 ° C at the time of polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). 40 µg of sugar and 3 to 20 monomers were 3585 µg per 1 g of the adhesive containing the mixture as a main component. In addition, although the obtained plastic lens did not produce whitening (cloudy of a lens) and bubble mixing, the notch of the lens peripheral part by liquid leakage generate | occur | produced, and even if it grind | polished the lens peripheral part, it was not able to obtain the lens of a usable level.

Comparative Example 2

78 mass parts of addition reaction type silicone adhesive (SD4560 by Toray Dow Corning Co., Ltd.), 22 mass parts of peroxide curable silicone adhesive (KR101-10 by Shin-Etsu Chemical Co., Ltd.), of the said addition reaction type 0.15 mass part of crosslinking agents (X-92-122 by Shin-Etsu Chemical Co., Ltd.) effective for silicone adhesives were stirred and mixed uniformly in toluene, and the adhesive solution was produced.

This pressure-sensitive adhesive solution is coated on a PET base material (25 μm thick) manufactured by Toyoboseki Co., Ltd., so that the pressure-sensitive adhesive layer has a thickness of 20 μm, and initially at 40 to 90 ° C. in the first half of the drying furnace. Dried. Then, it dried for 1 minute in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 145 degreeC, and obtained the adhesive tape for plastic lens molding of 45 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using the adhesive tape is molded at a maximum temperature of 160 ° C during polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). 235 µg of sugar and 3 to 20 monomers were 5002 µg per 1 g of the adhesive containing the mixture as a main component. In addition, although there was no liquid leakage, the obtained plastic lens had a bubble confirmed in lens shaping | molding, and whitening was confirmed in the whole lens, and even if it grind | polished the peripheral part of a lens, it was not able to obtain the lens of a usable level.

[Comparative Example 3]

0.15 mass parts of a crosslinking agent (X-92-122, manufactured by Shin-Etsu Chemical Co., Ltd.), which is effective for the addition-responsive silicone pressure sensitive adhesive (SD4560, manufactured by Toray Dow Corning Co., Ltd.) The part was stirred and mixed uniformly, and the adhesive solution was produced. The pressure-sensitive adhesive solution was coated on a PET substrate (25 μm thick) manufactured by Toyo Boseki, so that the pressure-sensitive adhesive layer had a thickness of 20 μm, and initially dried at 40 to 90 ° C. in the first half of the drying furnace. Then, it dried for 3 minutes in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 130 degreeC, and obtained the adhesive tape for plastic lens molding of 45 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using the adhesive tape is molded at a maximum temperature of 140 ° C. during the polymerization of the polymerizable monomer. In addition, as for the low molecular weight siloxane amount, 6-10 micrograms and 3-20 monomers per 1g of adhesives (the adhesive which consists of an addition reaction type silicone adhesive and a crosslinking agent) whose 3-10 monomers contain an addition reaction type silicone adhesive as a main component are addition reaction types. It was 6253 micrograms per gram of adhesive which has a silicone adhesive as a main component. In the obtained plastic lens, bubbles are observed in lens molding, and whitening is confirmed in the entire lens, and notches in the lens peripheral part due to some liquid leakage also occur. It was not too early to get a lens.

[Comparative Example 4]

96 parts by mass of the addition-responsive silicone adhesive (SD-4560, manufactured by Toray Dow Corning Co., Ltd.), 4 parts by mass of the peroxide-curable silicone adhesive (SH4280 PSA, manufactured by Toray Dow Corning Co., Ltd.), and the addition reaction. 0.25 mass parts of the crosslinking agent (BY24-741 made from Toray Dow Corning Co., Ltd.) which is effective for the silicone pressure sensitive adhesive of was uniformly stirred and mixed in toluene, and the adhesive solution was produced. The pressure-sensitive adhesive solution was coated on a PET film base material (thickness of 24 μm) manufactured by Teijin DuPont Co., Ltd. so that the pressure-sensitive adhesive layer had a thickness of 20 μm, and initially dried at 40 to 90 ° C. in the first half of the drying furnace. Then, it dried for 3 minutes in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 120 degreeC, and obtained the adhesive tape for plastic lens molding of 44 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using the adhesive tape is molded at a maximum temperature of 140 ° C. during the polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). 263 µg of sugar and 3 to 20 monomers were 5446 µg per 1 g of the adhesive containing the mixture as a main component. In addition, the obtained plastic lens cannot follow the thermal deformation (expansion and contraction) of the polymerizable monomer in lens molding, and notches and bubbles are generated in the outer peripheral portion of the lens due to the liquid leakage. The contained air was mixed, and as a result, whitening was confirmed in the whole lens, and even if the lens side was polished, it was not possible to obtain a lens of a usable level.

[Comparative Example 5]

78 mass parts of addition reaction type silicone adhesive (SD-4560 by Toray Dow Corning Co., Ltd.), 22 mass parts of peroxide-curable silicone adhesive (SH4280 PSA made by Toray Dow Corning Co., Ltd.), said addition reaction type 0.10 parts by mass of a crosslinking agent (BY24-741, manufactured by Toray Dow Corning Co., Ltd.), which was effective for the silicone pressure sensitive adhesive, was uniformly stirred and mixed in toluene to prepare an adhesive solution. The pressure-sensitive adhesive solution was coated on a PET film base material (thickness of 24 μm) manufactured by Teijin DuPont Co., Ltd. so that the pressure-sensitive adhesive layer had a thickness of 20 μm, and initially dried at 40 to 90 ° C. in the first half of the drying furnace. Then, it dried for 3 minutes in the zone which the maximum temperature of the heat processing provided in the latter part of a drying furnace becomes 180 degreeC, and obtained the adhesive tape for plastic lens molding of 44 micrometers in total thickness.

As shown in Table 1, the plastic lens produced using the adhesive tape is molded at a maximum temperature of 140 ° C. during the polymerization of the polymerizable monomer. In addition, the low molecular weight siloxane amount is 3 g of an adhesive whose main component is a mixture composed of an addition-reactive silicone pressure sensitive adhesive and a peroxide curable silicone pressure sensitive adhesive (pressure-sensitive adhesive consisting of an addition-reactive silicone pressure-sensitive adhesive and a peroxide curable silicone pressure-sensitive adhesive and a crosslinking agent). The amount of 49 µg and 3-20 saccharides was 4628 µg per 1 g of the pressure-sensitive adhesive containing the mixture as a main component. In addition, since the adhesive tape does not have a fixing force enough to seal the lens monomer in lens molding, the obtained plastic lens has notches and bubbles generated in the outer peripheral portion of the lens due to liquid leakage, The contained air was mixed, and as a result, whitening was confirmed in the whole lens, and even if the lens side was polished, it was not possible to obtain a lens of a usable level.

[Table 1]

10: substrate
20: Adhesive layer
30: Mold
100: adhesive tape for plastic lens molding
C: cavity

Claims (4)

Plastic lens molding used to form a cavity for adhering to the outer periphery of a pair of molds arranged at predetermined intervals, sealing the openings formed between the two molds, and filling the polymerizable monomer of the plastic lens. In the adhesive tape for
A tape-shaped base material, and the adhesion layer which adheres the said base material to the said mold, The said adhesion layer is 80 mass% or more and 95 mass% or less of addition reaction type silicone adhesive, and 5 mass of peroxide curable silicone adhesives It is comprised from the adhesive which has a mixture which consists of% or more and 20 mass% or less as a main component, and the dimethyl polysiloxane content of the trimer or more and 20 monomers or less in the adhesive which has the said mixture as a main component is per 1 g of adhesive which has the said mixture as a main component Adhesive tape for plastic lens molding, characterized in that 4850㎛ or less. Plastic lens molding used to form a cavity for adhering to the outer periphery of a pair of molds arranged at predetermined intervals, sealing the openings formed between the two molds, and filling the polymerizable monomer of the plastic lens. In the adhesive tape for
A tape-shaped base material and the adhesion layer which adheres the said base material to the said mold are provided, The said adhesion layer is 80 mass% or more and 95 mass% or less of addition reaction type silicone adhesive, and 5 mass% or more and 20 mass% of peroxide curable silicone adhesive It is comprised from the adhesive which has a mixture which consists of% or less as a main component, and the dimethyl polysiloxane content of the trimer or 10-mer body in the adhesive which has the said mixture as a main component is 165 micrograms or less per 1g of adhesives which make the said mixture a main component Adhesive tape for forming a plastic lens. Plastic lens molding used to form a cavity for adhering to the outer periphery of a pair of molds arranged at predetermined intervals, sealing the openings formed between the two molds, and filling the polymerizable monomer of the plastic lens. In the adhesive tape for
A tape-shaped base material and the adhesion layer which adheres the said base material to the said mold are provided, The said adhesion layer is 80 mass% or more and 95 mass% or less of addition reaction type silicone adhesive, and 5 mass% or more and 20 mass% of peroxide curable silicone adhesive It is comprised from the adhesive which has a mixture which consists of% or less as a main component, and the dimethyl polysiloxane content of the trimer or 10-mer body in the adhesive which has the said mixture as a main component is 50 microgram or less per 1g of adhesives which make the said mixture a main component Adhesive tape for forming a plastic lens. A method of manufacturing a plastic lens using the adhesive tape for molding a plastic lens according to any one of claims 1 to 3,
A pair of molds are disposed to face each other at predetermined intervals, and the adhesive tape for molding the plastic lens is adhered to the outer peripheral edges of the molds to seal the openings in the spaces formed between the molds, thereby polymerizing the plastic lens. A cavity forming step of forming a cavity filled with monomers,
A monomer filling step of filling the polymerizable monomer in the cavity;
And a polymerization step of polymerizing the polymerizable monomer filled in the cavity.

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