JPH03101926A - Demisting plastic - Google Patents

Abstract

PURPOSE:To obtain excellent demisting property and scratch resistance of the subject plastic by a method in which the metallic oxide-layer treated with specified treatment liquid is provided on one surface of plastic base, and an adhesive layer is provided on the other surface thereof. CONSTITUTION:A metallic oxide layer is formed on one surface of a plastic base. As the material constituting the metallic oxide, e.g. SiO2, SiO, Al2O3, MgO, ZrO2, CaO, TiO2, SnO2, In2O3, WO3, MoO3, BaO, ZnO, NiO, HfO2 or Ta2O3, etc., is used. The metallic oxide layer is treated with the treatment liquid containing the aliphatic hydrocarbon having at least one hydroxy group and the functional group except hydroxy group and/or the aliphatic hydrocarbon having at least three hydroxy group and no functional group except hydroxy group. The adhesive layer provided on the other surface of the plastic base is formed by coating its surface with the adhesive such as acryl group, urethane group, silicon group or rubber group, etc. The demisting plastic thus made may be used in sticking said adhesive surface-layer to the surface of glass or plastic.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to anti-fog plastics having scratch resistance.

(Prior Art) Generally, when the surface temperature of plastic or glass falls below the dew point, minute water droplets adhere to the surface, causing fogging. For example, it is well known that eyeglass lenses, goggles, car window glasses, etc. fog up when the surrounding temperature suddenly drops. If such a transparent member becomes cloudy, it will not be possible to see into the future, which will not only make the user feel uncomfortable, but also pose a risk of causing a serious accident. For this reason, various anti-fogging techniques have been proposed to prevent fogging of transparent members.

For example, JP-A No. 60-147446 proposes a technique for processing a solution containing an alkaline aqueous solution and benzyl alcohol into a cellulose triacetate plastic sheet, and JP-A No. 60-141727 proposes a technique for processing a solution containing an alkaline aqueous solution and benzyl alcohol into a plastic sheet. After the surface is treated with low temperature plasma,
A technique has been proposed in which the material is saponified with a strong alkaline aqueous solution and then coated with a surfactant.

(Problem to be Solved by the Invention) However, none of the above-mentioned methods has reached the point where both anti-fogging properties and scratch resistance are imparted to a practical level. The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide an anti-fog plastic having both anti-fog properties and scratch resistance. Another object of the present invention is to provide an anti-fog plastic that can be easily imparted with anti-fog properties simply by pasting it onto a transparent member such as plastic or glass.

(!I! Means for Solving the Problem) The antifogging plastic of the present invention is characterized in that the metal oxide layer provided on one surface of the plastic base material has one or more hydroxyl groups, and a functional group other than the hydroxyl group. and/or an aliphatic hydrocarbon having three or more hydroxyl groups and no functional groups other than hydroxyl groups, and an adhesive layer is formed on the other side of the plastic substrate. has been established, thereby achieving the above objectives. The present invention will be explained in detail below.

A metal oxide layer is formed on one side of the plastic substrate used in the present invention. The means for shaping the metal oxide layer is not particularly limited. For example, a physical vapor deposition method such as a vacuum evaporation method, a sputtering method, an ion plating method, or a chemical vapor deposition method such as a plasma CVD method can be used. The thickness of the metal oxide layer is preferably as thick as possible in order to improve scratch resistance, but it can be set as appropriate depending on the application. Plastic base materials include polyethylene terephthalate, polycarbonate, polymethyl methacrylate, vinyl chloride resin, polystyrene, polyimide, polypropylene, diethylene glycol diallyl carbonate, polyethylene, and ABS.
Resins, polyether sulfone, polyether ether, etc. are used. Its form may be a prestigious item or a film.

The material forming the metal oxide layer is, for example, Sin. , S
iO, Alias, MgO, ZrOt, C
aO, Tier, SnO. , Into. , WO2
, Mo03, BaO , ZnO , NiO S}
If. , Tal03, etc. The metal oxide layer can be formed by a single-layer film made of these materials, a single-layer film formed by combining two or more of these materials, or a stack of these single-layer films. It may also be a laminated film that is exposed to heat.

In particular, it is preferred that the top layer of the metal oxide layer is formed of silicon oxide or a composition containing silicon oxide. Further, the surface of the metal oxide layer is preferably treated with low-temperature plasma. Low-temperature plasma is plasma generated by discharging under reduced pressure, and is plasma in which the electron temperature in the plasma is much higher than the ion temperature. The method of generating low-temperature plasma is not particularly limited, but for example, after reducing the pressure in the vacuum layer to below io-'orr, inert gas such as oxygen gas, nitrogen gas, or argon is introduced to create the vacuum layer. One method is to generate low-temperature plasma by setting the gas pressure within the vacuum chamber to 10 to 10-37 orr and causing electrical discharge within the vacuum chamber. Any method may be used to cause the discharge, including methods using direct current discharge, alternating current discharge, high frequency discharge, microwave discharge, etc., and a method using high frequency electric current is preferably used. The output power for generating high-frequency discharge may be determined as appropriate depending on the type and thickness of the metal oxide layer to be treated, and is 5 to 300 W.
A range of is preferred.

The time for treating the surface of the metal oxide layer with low-temperature plasma may be appropriately determined depending on the type, thickness, etc. of the metal oxide layer, and is preferably in the range of 10 seconds to 15 minutes.

In the present invention, the metal oxide layer on one side of the plastic base material has one or more hydroxyl groups, and has three or more aliphatic hydrocarbons and/or hydroxyl groups having functional groups other than hydroxyl groups, and has hydroxyl groups. It is treated with a treatment liquid containing aliphatic hydrocarbons (hereinafter referred to as "hydrophilic organic substances") that have no other functional groups. Here, functional groups other than hydroxyl groups include, for example, carboxyl group (-coall), aldehyde group (-CHO), sulfo group (-So,H),
Examples of aliphatic hydrocarbons having a nitro group C*ot>, etc., and therefore having one hydroxyl group and a functional group other than the hydroxyl group include nitroethanol, hydroxyecunesulfonic acid, and hydroxyacetic acid. Further, examples of aliphatic hydrocarbons having three or more hydroxyl groups and no functional groups other than hydroxyl groups include glycerin, arabinose, and fructose. These may be used alone or in combination.

This treatment liquid is a solution containing the above hydrophilic organic substance and an organic solvent, a solution containing a hydrophilic organic substance and a large amount of water, or a solution containing a hydrophilic organic substance, water-soluble inorganic salts, and a large amount of water. can be used.

When the treatment liquid is prepared from a solution containing a hydrophilic organic substance and an organic solvent, the concentration of the hydrophilic organic substance is preferably 10% by weight or more, and in consideration of antifogging performance, it is more preferably 30% by weight or more. Further, the pH of the treatment liquid is preferably 7 to 12. The PHlg of the treatment solution can be adjusted by adding an aqueous solution using a base such as sodium hydroxide or ammonia, or an aqueous solution using an acid such as hydrochloric acid. If the pH of the treatment solution is too low, it is necessary to lengthen the treatment time, and if the p l+ of the treatment solution is high, the treatment time can be shortened, but metal oxides formed on the surface of the plastic substrate may Elution and peeling of the layer may occur easily. Appropriate treatment temperature and treatment time vary depending on the pH of the treatment liquid, the heat resistance of the plastic substrate, and the type of metal oxide layer. For example, when treating a plastic base material of polyethylene terephthalate film whose surface is coated with silicon oxide by vacuum evaporation, a pH 10 solution containing 50% by weight of glycerin, 45% by weight of ethanol, and 5% by weight of an aqueous sodium hydroxide solution is used. When using a treatment liquid, the treatment temperature is 3.
Preferably, the temperature is 5 to 60°C and the treatment time is 5 minutes or more. Examples of organic solvents that can be used in this treatment solution include ethanol, methanol, prohanol, butanol, and diethyl ether.

When the treatment liquid is prepared from a solution containing a hydrophilic organic substance and a large amount of water, the concentration of the hydrophilic organic substance is preferably 0.1% by weight or more, and in order to shorten the treatment time, it is 1% by weight. The above is more preferable.

Further, the pH of this treatment liquid is preferably 7 to 12.

The pH of the treatment solution can be adjusted to 11 by adding an aqueous solution using a base such as sodium hydroxide or ammonia, or an aqueous solution using an acid such as hydrochloric acid.

If the pH of the treatment liquid is too low, the treatment time will need to be lengthened; if the pH of the treatment liquid is high, the treatment time can be shortened, but the metal oxide layer formed on the surface of the plastic substrate may Elution and peeling are likely to occur. Appropriate treatment temperature and treatment time are determined by the P of this treatment liquid as described above.
It varies depending on H, the heat resistance of the plastic base material, and the type of metal oxide layer. For example, polyethylene terephthalate whose surface is coated with silicon oxide by vacuum evaporation.
When using a pHlo treatment solution consisting of 10% by weight glycerin and 90% by weight aqueous sodium hydroxide solution when treating plastic substrates for film, the treatment temperature should be 35-60°C and the treatment time should be at least 5 minutes. It is preferable that the treatment liquid is hydrophilic! When the preparation is made from a solution containing a substance, a water-soluble inorganic salt, and a large amount of water, the concentration of the hydrophilic organic substance is preferably 1% by weight or more, and more preferably 1% by weight or more to shorten the processing time. preferable. Examples of water-soluble inorganic salts that can be used include MCI. ．． Na
Cl, LiCI, CaClz, Mgc+. , Lii
SOa, KzSOs, CaSOs, NazSOa,
MgSO. chlorides and sulfates of alkali metals and alkaline earth metals such as NaCl, Li
CI is preferred, and the amount added is preferably as close to the saturated state as possible.

Moreover, the pH of this treatment liquid is preferably 7 to 12.

The pH of the treatment solution can be adjusted by adding an aqueous solution using a base such as sodium hydroxide or ammonia, or an aqueous solution using an acid such as hydrochloric acid. If the pH of the treatment liquid is too low, the treatment time will need to be lengthened; if the pH of the treatment liquid is high, the treatment time can be shortened, but the metal oxide layer formed on the surface of the plastic base material elution of,
Peeling is likely to occur. As described above, the appropriate treatment temperature and treatment time vary depending on the pH of the treatment liquid, the heat resistance of the plastic substrate, and the type of metal oxide layer.

For example, when treating a plastic base material of polyethylene terephthalate film whose surface has silicon oxide formed by vacuum evaporation, 10% by weight of glycerin, N
aC 115% by weight, sodium hydroxide aqueous solution 75% by weight
When using a treatment solution having a pH of 10, the treatment temperature is preferably 35 to 60°C and the treatment time is preferably 5 minutes or more.

Although glycerin was explained as a hydrophilic organic substance in the treatment conditions for the treatment liquid above, when processing with a treatment liquid containing a hydrophilic organic substance other than glycerin, the same treatment conditions as when using glycerin should be used. Can be done. The treatment method is not particularly limited, and in addition to the above-mentioned method of immersing the plastic base material in the treatment solution, for example, a method of spraying the treatment solution onto the surface of the plastic base material, a method of spraying the treatment solution on the surface of the plastic base material, Examples include a method of applying vapor of a treatment liquid to the surface of the base material, and a method of applying the treatment liquid to the surface of the plastic base material and then maintaining it under high humidity of 80 to 100% RH.

It is preferable that the plastic substrate treated by any of the above methods is heat treated by being held at a high temperature after the treatment. The heat treatment conditions may be determined as appropriate depending on the type of metal oxide layer, the type of plastic base material, the type of treatment liquid, etc., but humidity is 30%RH or less, temperature is 50-15%
Preferably, it is heat treated at 0°C for 5 minutes to 3 hours. However, the heat treatment temperature should desirably be below the thermal deformation temperature of the plastic substrate in order to prevent the metal oxide layer from peeling off from the plastic substrate and the metal oxide layer from cracking. In addition, if the strong pH of the treatment liquid impairs the adhesion of the metal oxide layer to the plastic substrate, it is desirable to wash away the treatment liquid on the surface of the plastic substrate with neutral water before heat treatment. The surface of the antifogging plastic thus obtained exhibits excellent antifogging properties. As a result of analyzing the surface of anti-fog plastic that has been anti-fog treated, it was found that the metal oxide layer on the surface of the plastic base material and the organic layer formed by hydrophilic organic substances are chemically bonded, and the hydrophilic organic substances form a chemical bond. This seems to be because the layer is uniformly formed over the entire surface of the anti-fog plastic substrate. In addition, since the organic layer is extremely thin, less than 100 mm thick, the organic layer will not be damaged by external force, and since the organic layer is chemically bonded to the metal oxide layer, it will not peel off.

The adhesive layer provided on the other side of the plastic base material is
It can be shaped by applying an acrylic, urethane, silicone, or rubber adhesive to the other side of the plastic base material. The adhesive layer is preferably transparent and has high light transmittance, but it may be colored as long as it has high light transmittance. Furthermore, a removable release paper may be attached to the surface of this adhesive layer. The anti-fog plastic formed in this way can be used by pasting its adhesive layer onto a glass or plastic surface, allowing the outside to be seen through the anti-fog plastic and the glass or other plastic, and the surface Water droplets will not adhere to the surface and cause cloudiness. (Examples) The present invention will be specifically described below based on Examples.

! 1. After mixing 70 parts by weight of glycerin, 25 parts by weight of ethanol, and a small amount of water, an aqueous sodium hydroxide solution and water were added to obtain 100 parts by weight of a treatment liquid having a pH of 10.

On the other hand, a polyethylene terephthalate film (PET film) with a thickness of 100 μm was used as a plastic base material, and a
A film of silicon oxide (SiOz) with a thickness of μm was formed. Next, the PET film coated with the silicon oxide layer in this way was immersed in the above treatment solution and heated at 50°C.
After being treated for 30 minutes, it was taken out from the treatment solution and dried.

Next, an acrylic adhesive was applied and dried on the back side of the PET film, and an acrylic adhesive layer with a thickness of 40 μm was laminated to obtain an antifogging plastic.

Next, we evaluated the anti-fog properties and scratch resistance of this anti-fog plastic. The anti-fog property was evaluated by keeping the anti-fog plastic in an atmosphere of 15'C and 40% relative humidity for 10 minutes or more, then leaving it in an atmosphere of 40C and 90% relative humidity. After wetting the surface of the cloudy plastic, wipe it with a cloth. This operation was repeated and evaluated based on the number of times the surface of the antifogging plastic started to become foggy. The scratch resistance was evaluated by applying #000 steel wool to the anti-fog plastic surface, rotating the steel wool 20 times with the steel wool pressed against the anti-fog plastic surface with a set load, and then blowing exhaled air onto the anti-fog plastic surface. The maximum load at which the antifogging plastic surface does not become foggy due to the exhaled air is shown. The results are shown in Table 1.

As shown in Table 1, an antifogging plastic was obtained in the same manner as in Example 1, except that the composition of the treatment liquid and the treatment conditions were changed. The anti-fog properties and scratch resistance of this anti-fog plastic were evaluated in the same manner as in Example 1. The results are shown in Table 1.

A metal oxide layer with a composition of SiOz/Mg0.4/1 (weight ratio) was formed on the surface of the PET film to a thickness of 2 μm by vacuum evaporation. This metal oxide layer-coated PET film was prepared using different treatment solution compositions as shown in Table 1.
An anti-fog plastic was obtained in the same manner as in Example 1. The anti-fog properties and scratch resistance of this anti-fog plastic were evaluated in the same manner as in Example 1. The results are shown in Table 1.

2 μm thick silicon oxide (S) on the surface of the PET film
A film of titanium oxide (Tio2) with a thickness of 0.5 μm was formed on top of the film of titanium oxide (Tio2) with a thickness of 0.5 μm. An antifogging plastic was obtained from this metal oxide layer-coated PET film in the same manner as in Example 1, except that the processing conditions were changed as shown in Table 1. The anti-fog properties and scratch resistance of this anti-fog plastic were evaluated in the same manner as in Example 1. The results are shown in Table I. A 0.5 μm thick silicon oxide (SiO ) film is formed on the surface of the Tomotane Madaradama PET film using a vacuum evaporation method, and then a 4 μm thick silicon oxide (Sing) film is formed on top of that. did. An antifogging plastic was obtained from this metal oxide layer coated PET film in the same manner as in Example 1, except that the composition of the treatment liquid was changed as shown in Table 1. The anti-fog properties and scratch resistance of this anti-fog plastic were evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparison ■ Silicon oxide (S) with a thickness of 2 μm is placed on the surface of the PET film.
The film of i(h) was shaped using the vacuum M deposition method. The antifogging properties and scratch resistance of this metal oxide layer-coated PET film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparison 1 The antifogging properties and scratch resistance of commercially available products obtained by saponifying cellulose acetate were evaluated in the same manner as in Example I. The results are shown in Table 1.

Antifogging properties and scratch resistance of a commercially available PET film coated with a hydrophilic resin were evaluated in the same manner as in the examples. The results are shown in Table 1. Practical test-1 After mixing 1 part by weight of glycerin and water, an aqueous sodium hydroxide solution and water were added to obtain 100 parts by weight of a treatment liquid having a pH of 10.

On the other hand, a polyethylene terephthalate film (PET film) with a thickness of 100 μm was used as a plastic base material, and a
A film of silicon oxide (Sin.) with a thickness of μm was formed. Next, the PET film coated with the silicon oxide layer in this way was immersed in the above treatment solution and heated to 50"C.
After being treated for 60 minutes, it was taken out from the treatment solution and dried.

Next, an acrylic adhesive was applied and dried on the back side of the PET film, and an acrylic adhesive layer having a thickness of 40 tIm was laminated to obtain an antifogging plastic.

The anti-fog properties and scratch resistance of the obtained anti-fog brass tink were evaluated in the same manner as in Example 1. The results are shown in Table 2.

As shown in Table 2, antifogging plastics were obtained in the same manner as in Example IO, except that the strength of the treatment liquid and the treatment conditions were changed. The antifogging properties and scratch resistance of this antifogging plastic were evaluated in the same manner as in Example 1. The results are shown in Table 2.

SiO on the surface of PET film! A metal oxide layer having a composition of /MgO・4/l (weight ratio) was formed to a thickness of 2 μm by vacuum evaporation. An antifogging plastic was obtained from this metal oxide layer-coated PET film in the same manner as in Example 10, except that the treatment liquid and treatment conditions were changed as shown in Table 2. The anti-fog properties and scratch resistance of this anti-fog plastic were evaluated in the same manner as in Example 1. The results are shown in Table 2.

11 Silicon oxide (S) with a thickness of 2 μm is applied to the surface of the PET film.
Ift) was formed using a vacuum evaporation method, and a titanium oxide (TiOX) film having a thickness of 0.5 μm was further formed thereon. This metal oxide layer-coated PET film was prepared in the same manner as in Example 10, except that the composition of the processing liquid and the processing conditions were changed as shown in Table 2. An anti-fog plastic was obtained. The antifogging properties and scratch resistance of this antifogging plastic were evaluated in the same manner as in Example 1. The results are shown in Table 2.

Grasshopper Group 11 A 0.5 μm thick silicon oxide (SiO) film was formed on the PET film surface by vacuum evaporation, and then a 4 μm thick silicon oxide (SiO) film was added on top of that. It was impressive. An antifogging plastic was obtained from this metal oxide layer-covered 1'1 PET film in the same manner as in Example 10, except that the composition of the treatment liquid and the treatment conditions were changed as shown in Table 2. The anti-fog properties and scratch resistance of this anti-fog plastic were evaluated in the same manner as in Example 1. Second result
Shown in the table.

Table 2 (margin below)? After mixing 20 parts by weight of eglycerin, 115 parts by weight of NaC, and water, aqueous sodium hydroxide solution and water were added to adjust the pH to 1.
100 parts by weight of a treatment solution of 0 was obtained. On the other hand, a polyethylene terephthalate film (PET film) with a thickness of 100 pm was used as the plastic base material, and this PE
A 2 μm thick silicon oxide (SiO) film was formed on the surface of the T film by vacuum evaporation. Next, the PET film coated with the silicon oxide layer in this way was immersed in the above treatment solution, treated at 50"C for 30 minutes, and then taken out from the treatment solution and dried.

Next, an acrylic adhesive was applied and dried on the back side of the PET film, and an acrylic adhesive layer with a thickness of 40 μm was laminated to obtain an antifogging plastic.

The antifogging properties and scratch resistance of the obtained antifogging plastic were evaluated in the same manner as in Example 1. The results are shown in Table 3.

As shown in Table 3, an antifogging plastic was obtained in the same manner as in Example 2l, except that the composition of the treatment liquid was changed. Example 1 Evaluation of anti-fog properties and scratch resistance of this anti-fog plastic
I did it in the same way. The results are shown in Table 3.

A metal oxide layer having a composition of SiOz/MgO·4/1 (weight ratio) was formed on the surface of the PET film to a thickness of 2 μm by vacuum evaporation. An antifogging plastic was obtained from this metal oxide layer coated PET film in the same manner as in Example 21, except that the processing conditions were changed as shown in Table 3. Example 1 Evaluation of anti-fog properties and scratch resistance of this anti-fog plastic
I did it in the same way. The results are shown in Table 3.

Observation Team 1 2μm thick silicon oxide (S
A film of titanium oxide (TiO. An antifogging plastic was obtained from this metal oxide layer-coated PET film in the same manner as in Example 2l, except that the processing conditions were changed as shown in Table 3. The antifogging properties and scratch resistance of this antifogging plastic were evaluated in the same manner as in Example 1. The results are shown in Table 3.

Reference 1 A film of silicon oxide (SiO2) with a thickness of 0.5 μm was formed on the surface of the PET film by vacuum evaporation, and then a film of silicon oxide (SiOz) with a thickness of 4 μm was further applied on the surface of the PET film. Formed. This PET film coated with a metal oxide layer was treated in the same manner as in Example 21 to obtain an antifogging plastic.

The antifogging properties and scratch resistance of this antifogging plastic were evaluated in the same manner as in Example 1. The results are shown in Table 3.

(The following is a margin) Brush 3 back tip [and 1 After mixing 20 parts by weight of glycerin, 15 parts by weight of NaCI, and water, add an aqueous sodium hydroxide solution and water to adjust the pH to 1.
100 parts by weight of a treatment solution of 0 was obtained.

On the other hand, a 100 μm thick polyethylene terephthalate film (PET film) was used as a plastic base material, and a 2 μm thick silicon oxide (Sing) film was formed on the surface of this PET film by vacuum evaporation. Next, the PET film coated with the silicon oxide layer in this way is coated with a high frequency sputtering device (13
．． 56MHz) and 4 X 10-'Torr
After reducing the pressure to
Torr, and while maintaining that state, plasma was generated with high frequency power of 25 W, and the surface of the silicon oxide film was heated to 30
Low-temperature plasma treatment was performed for seconds. Next, a PET film coated with a silicon oxide layer that has been subjected to low-temperature plasma treatment is immersed in the above treatment solution and treated at 50'C for 30 minutes, then taken out from the treatment solution and soaked with distilled water. I used it to wash it and then dry it. Next, an acrylic adhesive was applied and dried on the back side of the PET film, and an acrylic adhesive layer with a thickness of 40 μm was laminated to obtain an antifogging plastic.

The anti-fog property and scratch resistance of the obtained anti-fog plastic were evaluated in the same manner as in Example 1, and the anti-fog property was 40.
0 times or more, and the scratch resistance was 500 to 600 g. Silicon oxide (S) with a thickness of 2 μm is coated on the surface of the PET film.
The film of l(b) was formed by vacuum evaporation. Next, the PET film coated with the silicon oxide layer in this way was immersed in the same treatment solution as used in Example 31, and after being treated at 50"C for 30 minutes, It was taken out, washed with distilled water, and then dried.

Next, the PET film whose surface was covered with a silicon oxide layer subjected to hydrophilic treatment was supplied to a dryer in which the ambient temperature was maintained at 75° C. and heat-treated for 1 hour.

Next, an acrylic adhesive was applied and dried on the back side of the PET film, and an acrylic adhesive layer with a thickness of 40 μm was laminated to obtain an antifogging plastic.

The anti-fog property and scratch resistance of the obtained anti-fog plastic were evaluated in the same manner as in Example 1, and the anti-fog property was 40.
0 times or more, and the scratch resistance was 500 to 600 g.

Evidence 11 A PET film obtained in the same manner as in Example 31 and whose surface was coated with a silicon oxide layer subjected to hydrophilic treatment was fed to a dryer whose ambient temperature was maintained at 75°C for 1 hour. Heat treated.

Next, an acrylic adhesive was applied and dried on the back side of the PET film, and an acrylic adhesive layer with a thickness of 40 μm was laminated to obtain an antifogging plastic.

The anti-fog property and scratch resistance of the obtained anti-fog plastic were evaluated in the same manner as in Example 1, and the anti-fog property was 40.
0 times or more, and the scratch resistance was 500 to 600 g.

(Effects of the Invention) As described above, according to the present invention, an anti-fog plastic having excellent anti-fog properties and excellent scratch resistance can be obtained. Therefore, by applying this anti-fog plastic to, for example, eyeglass lenses, goggles, window glass, etc., it is possible to easily obtain an anti-fog transparent member that is resistant to fogging even due to sudden changes in ambient temperature.

Claims (1)

[Claims] 1. The metal oxide layer provided on one side of the plastic base material has one or more hydroxyl groups, and has three or more aliphatic hydrocarbons and/or hydroxyl groups having functional groups other than hydroxyl groups, and has a functional group other than hydroxyl groups. An antifogging plastic is treated with a treatment liquid containing an aliphatic hydrocarbon having no functional groups, and an adhesive layer is provided on the other side of a plastic substrate.