阅读说明：本技术 塑料光学制品以及塑料眼镜片和眼镜 (Plastic optical product, plastic spectacle lens and spectacles ) 是由 高桥宏寿 于 2018-06-25 设计创作，主要内容包括：[课题]本发明提供具有防反射特性等所期望的特性、密合性和抗外部应力性优异的塑料光学制品等。[解决手段]一种塑料光学制品，其在塑料基材的单面或双面具备直接或隔着中间膜形成的光学多层膜，上述光学多层膜包含具有拉伸应力作为内部应力的高折射率材料制的拉伸应力高折射率层、以及低折射率材料制的低折射率层，上述拉伸应力高折射率层以物理膜厚为10nm以下的状态配置在上述光学多层膜中从上述基材侧数起的第1层。(The present invention provides a plastic optical product having desired characteristics such as antireflection characteristics, and excellent adhesion and external stress resistance. [ MEANS FOR solving PROBLEMS ] A plastic optical product comprising an optical multilayer film formed directly or through an intermediate film on one or both surfaces of a plastic substrate, wherein the optical multilayer film comprises a tensile stress high refractive index layer made of a high refractive index material having a tensile stress as an internal stress and a low refractive index layer made of a low refractive index material, and the tensile stress high refractive index layer is disposed in the 1 st layer from the substrate side in the optical multilayer film in a state where the physical film thickness is 10nm or less.)

1. A plastic optical article characterized in that,

an optical multilayer film is provided on one or both surfaces of a plastic substrate, directly or through an intermediate film,

the optical multilayer film comprises a tensile stress high refractive index layer made of a high refractive index material having a tensile stress as an internal stress, and a low refractive index layer made of a low refractive index material,

the tensile stress high refractive index layer is disposed on the 1 st layer counted from the base material side in the optical multilayer film in a state that the physical film thickness is 10nm or less.

2. The plastic optical article according to claim 1, wherein in the optical multilayer film, high refractive index layers made of a high refractive index material and the low refractive index layers are alternately arranged.

3. A plastic optical article according to claim 1 or claim 2, wherein the tensile-stressed high refractive index layer is ZrO₂And (3) a layer.

4. A plastic optical article according to any one of claims 1 to 3, wherein the total physical film thickness of the optical multilayer film is 200nm or more.

5. A plastic optical article according to any of claims 1 to 4, wherein the intermediate film is a hardcoat film.

6. A plastic spectacle lens, characterized in that it uses the plastic optical article according to any one of claims 1 to 5.

7. A spectacle lens comprising the plastic spectacle lens according to claim 6.

Technical Field

The present invention relates to plastic optical products represented by plastic spectacle lenses (including sunglass lenses) and spectacles (including sunglasses) using the plastic spectacle lenses.

Background

Examples 2 and 3 described in international publication No. 2010/016462 (patent document 1) are known as plastic lenses having good reflection properties and heat resistance.

The lens comprises a thermosetting silicone hard coat layer and an antireflection film on a plastic substrate. The antireflection film has a total of 4 layers in which low refractive index layers and high refractive index layers are alternately laminated, wherein the 1 st layer closest to the plastic substrate is a zirconia layer as a high refractive index layer having a physical film thickness of 11nm (nanometers), the 2 nd and 4 th layers are silica as low refractive index layers, and the total film thickness of the antireflection film is less than 200nm (example 2: 174 nm; example 3: 170 nm).

Disclosure of Invention

Problems to be solved by the invention

In the above-mentioned lens, since the physical thickness of the 1 st layer of the antireflection film is 11nm, the antireflection film may become brittle.

That is, since the zirconia layer exhibits tensile stress as internal stress and the silica layer, the plastic base material and the silicone-based hard coat layer exhibit compressive stress as internal stress, the 1 st layer of the antireflection film adjacent to the hard coat layer is often set to be a silica layer exhibiting the same compressive stress as the plastic base material, unlike the above-described lens. On the other hand, the adhesion of the zirconia layer to the hard coat layer is better than that of the silica layer. Therefore, when the adhesion is regarded as important and the physical thickness of the zirconia layer of the antireflection film 1 is set to 11nm, the opposite actions of the tensile stress and the compressive stress of the hard coat layer are retained in the antireflection film and the hard coat film. Therefore, for example, when a plastic spectacle lens and a jig (lens lock cap) attached thereto are clamped by a lens processing shaft and lens shape processing for cutting the outer shape of the plastic spectacle lens for incorporating into a spectacle frame is performed, the antireflection film of the plastic spectacle lens may be broken or the like from a portion clamped by the lens processing shaft and the jig, and the resistance of the antireflection film-equipped lens against external stress may be weakened.

Accordingly, a main object of the present invention is to provide a plastic optical product, a plastic spectacle lens, and spectacles, which have desired properties such as antireflection properties and are excellent in adhesion and external stress resistance.

Means for solving the problems

In order to achieve the above object, the invention according to claim 1 is a plastic optical product comprising an optical multilayer film disposed directly or via an intermediate film on one or both surfaces of a plastic substrate, wherein the optical multilayer film comprises a tensile stress high refractive index layer made of a high refractive index material having a tensile stress as an internal stress and a low refractive index layer made of a low refractive index material, and the tensile stress high refractive index layer is disposed on the 1 st layer from the substrate side in the optical multilayer film in a state where a physical film thickness is 10nm or less.

The invention according to claim 2 relates to the invention, wherein the high refractive index layer made of a high refractive index material and the low refractive index layer are alternately arranged in the optical multilayer film.

The invention according to claim 3 is the above invention, wherein the tensile stress high refractive index layer is ZrO₂And (3) a layer.

The invention according to claim 4 is the optical multilayer film according to the above invention, wherein the total physical film thickness is 200nm or more.

The invention according to claim 5 is the above invention, wherein the intermediate film is a hard coat film.

The invention of claim 6 relates to a plastic spectacle lens, characterized in that it uses the above plastic optical product.

The invention of claim 7 relates to eyeglasses using the above plastic eyeglass lens.

ADVANTAGEOUS EFFECTS OF INVENTION

The main effect of the present invention is to provide a plastic optical product or the like having desired properties such as antireflection properties and excellent adhesion and external stress resistance.

Drawings

Fig. 1 is a graph showing reflectance distributions of example 1 and comparative example 1.

FIG. 2 is a graph showing the reflectance distributions of example 2 and comparative examples 2 to 3.

Fig. 3 is a graph showing reflectance distributions of example 3 and comparative example 5.

Fig. 4 is a graph showing reflectance distributions of example 4 and comparative example 6.

Detailed Description

The following describes an example of an embodiment of the present invention.

The present invention is not limited to the following embodiments.

In the plastic optical product of the present invention, an optical multilayer film is formed on one surface or both surfaces of a base material.

In the present invention, the base material may be any material as long as it is plastic, and preferably has light-transmitting properties. The material of the substrate is preferably a thermosetting resin, for example, a polyurethane resin, a thiocarbamate resin, a urethane-urea resin, an episulfide resin, a polycarbonate resin, a polyester resin, an acrylic resin, a polyethersulfone resin, a poly-4-methyl-1-pentene resin, a diethylene glycol bisallylcarbonate resin, or a combination thereof. Further, preferable resins having a high refractive index (particularly for use as an ophthalmic lens) include episulfide resins obtained by addition polymerization of episulfide groups to polythiols and/or sulfur-containing polyols, and combinations of the episulfide resins with other resins.

The optical multilayer film is provided in order to obtain desired characteristics such as antireflection characteristics and reflection enhancement characteristics. The design of the optical multilayer film is changed by changing design factors such as the number of layers of the high refractive index layer and the low refractive index layer, selection of materials, and increase and decrease of the thickness of each layer (physical film thickness or optical film thickness of the layer). The optical multilayer film is preferably an inorganic multilayer film using a dielectric material, and preferably has the following characteristics. When the optical multilayer films are formed on both surfaces, it is preferable that all of the optical multilayer films have the following characteristics, and it is more preferable that all of the optical multilayer films have the same laminated structure.

That is, in the optical multilayer film, it is preferable that the low refractive index layers and the high refractive index layers are alternately laminated, and when the layer closest to the substrate (the layer closest to the substrate) is the 1 st layer, the 1 st layer is preferably a tensile stress high refractive index layer which is a high refractive index layer having a tensile stress as an internal stress, and the physical film thickness is preferably set to 10nm or less.

The high refractive index layer of the 1 st layer is made of zirconium oxide (ZrO)₂) Titanium oxide (TiO)₂) Tantalum oxide (Ta)₂O₅) Niobium oxide (Nb)₂O₅) Hafnium oxide (HfO)₂) Or a mixture of two or more of them, and the like, and is preferably formed of ZrO₂And (4) forming. Representative high refractive index materials include, in addition to selenium oxide (CeO)₂) And, in addition, all have tensile stress.

The odd-numbered layers are high refractive index layers and are formed of the same high refractive index material as the layer 1 (tensile stress high refractive index layer), or formed of CeO₂Etc., or a high refractive index material exhibiting compressive stress (compressive stress high refractive index layer), or a mixture thereof (mixed high refractive index layer).

In addition, the even number layer is a low refractive index layer made of silicon oxide (SiO)₂) Alumina (Al)₂O₃) Calcium fluoride (CaF)₂) Magnesium fluoride (MgF)₂) Or a mixture of two or more of them. In the present representative low refractive index materials, except magnesium fluoride (MgF)₂) In addition, they all have compressive stress.

Alternatively, CeO may be added₂And the high refractive index material exhibiting compressive stress is disposed in the 2 nd layer adjacent to the 1 st layer. In this case, the high refractive index material may be disposed in the 3 rd layer, or the low refractive index material may be disposed in the 3 rd layerIn the latter case, the odd-numbered layers after the 3 rd layer are low refractive index layers, and the even-numbered layers are high refractive index layers. Similarly, a high refractive index layer of another material may be disposed in an adjacent layer of the high refractive index layer other than the 1 st layer, and a low refractive index layer of another material may be disposed in an adjacent layer of the low refractive index layer other than the 1 st layer.

The low refractive index layer and the high refractive index layer of the optical multilayer film are formed by a vacuum evaporation method, an ion-assisted deposition method, an ion plating method, a sputtering method, or the like.

In addition, from the viewpoint of ease of film design and film formation cost, it is preferable to use 2 or less types of high refractive index material and low refractive index material, and more preferable to use 1 type of high refractive index material and low refractive index material.

In the present invention, other types of films such as a hard coat film (HC film), an antifouling film (water repellent film, oil repellent film) and the like may be added between the optical multilayer film and the base material and at least one portion of the surface of the optical multilayer film, and when the optical multilayer film is formed on both surfaces, the types of the films to be added may be changed from each other, and the presence or absence of the films may be changed from each other.

In the case where the HC film is disposed as a film (intermediate film) added between the optical multilayer film and the substrate, the HC film is preferably formed by uniformly applying a hard coating liquid to the surface of the substrate.

The HC film is preferably formed using an organosiloxane resin containing inorganic oxide fine particles (an example of a silicone HC film). The organosiloxane resin is preferably obtained by hydrolyzing and condensing an alkoxysilane. Specific examples of the organosiloxane resin include gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropyltriethoxysilane, methyltrimethoxysilane, ethyl silicate, and a combination thereof. These hydrolysis-condensation products of alkoxysilanes are produced by hydrolyzing the alkoxysilane compound or a combination thereof with an acidic aqueous solution such as hydrochloric acid.

On the other hand, specific examples of the material of the inorganic oxide fine particles include individual sols of zinc oxide, silica (silica fine particles), alumina, titanium oxide (titanium oxide fine particles), zirconia (zirconia fine particles), tin oxide, beryllium oxide, antimony oxide, tungsten oxide, and cerium oxide, or a mixture of two or more of them. From the viewpoint of ensuring the transparency of the HC film, the diameter of the inorganic oxide fine particles is preferably 1nm to 100nm, more preferably 1nm to 50 nm. In addition, from the viewpoint of ensuring the hardness and toughness of the HC film to an appropriate degree, the mixing amount (concentration) of the inorganic oxide fine particles is preferably 40 wt% or more and 60 wt% or less of the total components of the HC film. In addition, at least one of a metal acetylacetonate and a metal salt of ethylenediamine tetraacetic acid may be added as a curing catalyst to the hard coating liquid, and a surfactant, a colorant, a solvent, and the like may be added as necessary for securing adhesion to a substrate, easiness of formation, imparting a desired (semi-) transparent color, and the like.

The HC film may be formed using an acrylic resin (acrylic HC film). In this case, it is preferable to use a UV-curable acrylic resin that is cured by irradiation with Ultraviolet (UV) rays, and to form the acrylic resin by irradiation with UV rays.

The physical film thickness of the HC film is preferably set to 0.5 μm (μm) to 4.0 μm. The lower limit of the film thickness range is determined based on the difficulty in obtaining sufficient hardness when the film thickness is thinner than the above range. On the other hand, the upper limit is determined based on the significantly improved possibility of occurrence of problems relating to physical properties such as cracking and brittleness when the thickness is larger than the upper limit.

In addition, an undercoat film may be added between the HC film and the surface of the substrate in order to improve the adhesion of the HC film. Examples of the material of the undercoat film include a urethane resin, an acrylic resin, a methacrylic resin, a silicone resin, or a combination thereof. The undercoat film is preferably formed by uniformly applying an undercoat liquid to the surface of the substrate. The primer liquid is a liquid obtained by mixing the resin material and the inorganic oxide fine particles in water or an alcohol solvent.

Such a plastic substrate and the HC film have a compressive stress as an internal stress, and when the 1 st layer of the optical multilayer film in contact with either of them is a high refractive index layer having a tensile stress, although the adhesion to the substrate or the HC film is improved as compared with the case where the 1 st layer is a low refractive index layer having a compressive stress, the resistance to an external stress is weakened by the film structure while retaining the internal stress opposite to the compressive stress and the tensile stress.

In the optical multilayer film of the present invention, since the physical film thickness of the 1 st layer as the high refractive index layer having a tensile stress is 10nm or less, the magnitude of the tensile stress held per unit area is a predetermined level or less, and the level of the opposite internal stress is suppressed to be small even when the optical multilayer film contacts a substrate or an HC film having a compressive stress. Further, even if the physical film thickness of the 1 st layer is 10nm or less, the 1 st layer, which is a high refractive index layer having a tensile stress, is not changed in contact with the substrate or the HC film, and therefore, the adhesion between the optical multilayer film and the substrate or the HC film can be maintained.

In the optical multilayer film, the total physical film thickness obtained by summing the physical film thicknesses of the respective layers is preferably 200nm or more in view of the following. That is, when the total physical film thickness is such a thickness, it is difficult to ensure a balance of internal stresses of the optical multilayer film due to the internal stresses of the respective layers, and it is difficult to ensure adhesion of the optical multilayer film in such a state, but by disposing the high refractive index layer of the above-described 1 st layer, adhesion can be ensured even in an optical multilayer film having such a thickness.

When the adhesion of the optical multilayer film is secured, the resistance of the plastic optical product with the optical multilayer film to external stress is improved, and the occurrence of cracks (cracks) in the optical multilayer film or the like due to the pressure or stress applied during the processing of the plastic optical product or the like can be prevented.

Preferably, the base material is a plastic spectacle lens base material, and the plastic optical product is a plastic spectacle lens.

When the plastic optical product is a plastic spectacle lens, cracks (cracks) can be prevented from occurring in the optical multilayer film or the like when the plastic optical product is subjected to lens shape processing.

In addition, the plastic eyeglass lens can be used to make eyeglasses.