JPS6183029A - Transparent synthetic resin body having permeability resistance - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a transparent synthetic resin body having moisture permeability resistance.

(Conventional technology) Moisture-resistant transparent synthetic resin bodies have traditionally been used in the packaging of food, medicine, and chemical products to avoid deterioration of the contents, and in the electronics field to protect KL elements. has been done.

For example, JP-A No. 51-114483 proposes a polyester film on which π metal aluminum is vapor-deposited, but when aluminum is vapor-deposited, the transparency is naturally impaired and the adhesion strength is relatively low. Can only be used for limited purposes. Also, special public service 53-1
Japanese Patent No. 2953 proposes that a thin film layer of ViSilOy is provided to maintain transparency, but the moisture permeability resistance is insufficient.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional drawbacks, does not impair transparency,
Furthermore, the invention was made for the purpose of providing a transparent resin body with good moisture permeability.

(Means for Solving the Problems) The gist of the present invention is that on at least one side of a transparent synthetic resin body,
5i02, AI! 203, MO(R(FiCa
, Sr.

represents an alkaline earth metal group such as Ba) is the molar ratio, (
SiO2) : (AI!z03) : (MO) =
A transparent thin film layer of a composition having a ratio of 2 to 9:1 to 5:1 to 5 is formed, and a transparent thin film layer of magnesium oxide is formed on the transparent IIJ'1 film layer. It consists of a transparent synthetic resin body.

As shown in FIG. 1, a transparent base ft such as a polyethylene terephthalate film, one side K, 5i of a resin substrate 1,
02, AI! 203, a transparent thin film layer 2 of a composition made of MO is formed, a transparent thin film layer 3 of magnesium oxide is formed on the layer 2, and if necessary, a heat-sealable synthetic resin film 4 is formed on the layer 3. are laminated to form a transparent synthetic resin body having moisture permeability resistance according to the present invention.

Note that, depending on the use of the transparent synthetic resin body, the transparent thin film layers 2 and 3 may be formed not only on one side of the base 1 but also on both sides as appropriate.

In the present invention, polyvinyl chloride, polystyrene, polyester, polyvinyl butyral, polyethylene, polypropylene, polyamide, cellophane, etc. are used as the transparent synthetic resin of the base.

Furthermore, it is convenient for the transparent synthetic resin body to be a flexible film-like body for use in packaging or stacking. However, the present invention is not limited to those in which the substrate is a film-like body, but can be applied to, for example, synthetic resin molded products such as plate-like bodies and lens bodies. Deterioration and deformation can be prevented.

The transparent resin body is preferably a film-like body having flexibility of 5 to 300 μm, and more preferably has a thickness of 5 to 100 μm. When depositing a monooxide composition on a film-like transparent synthetic resin body, a winding process using a cooling roll is usually required, but if the thickness of the film-like transparent synthetic resin body is less than 5 μm, Wrinkles and cracks are likely to occur, and if the thickness exceeds 300 μm, flexibility becomes poor and continuous winding becomes difficult.

A transparent thin film layer is formed on at least one side of the transparent synthetic resin body. The transparent thin film layer is 5i02.

The molar ratio of Al2O3, MO (M represents an alkaline earth metal group such as Ca, Sr, Ba, etc.), (SiO2
): (AlzOa): (8(O)=2~9:1~5
: A transparent thin film layer of the compositions 1 to 5 is formed, and a transparent thin film layer of magnesium oxide is formed thereon. A thin film layer is formed. If the molar ratio of the transparent thin film layer of the composition consisting of 5i02° Alzos and MO is out of the above range, phase separation tends to occur and moisture resistance decreases. If the content of oxides such as PbO, Na2O, and B2O3 as impurities in the composition is 5% by weight or less, no extreme deterioration in moisture permeability will be observed, and the transparent synthetic resin body having moisture permeability of the present invention will not be significantly deteriorated. When manufacturing, it is desirable that VC#-i be within the above range.

To the above substrate! The formation of a transparent thin film layer of a composition consisting of 3i03, Al2O3, and No, and the formation of a transparent thin film layer of magnesium oxide thereon, can be carried out using known methods such as vacuum evaporation, ion plating, and sputtering. You can do it with The formation method will be explained in detail below.

The most preferred method for forming a transparent thin film layer of a composition consisting of 5i02, A/203, MO on the above substrate is sputtering, and the sputtering target can be used to form a transparent thin film layer of the above composition. .

Further, a transparent thin film having the above composition can also be formed by a vacuum evaporation method or an ion plating method. In the case of vacuum evaporation, it is said to be difficult to form a thin film layer using mixed substances having different vapor pressures with the same composition. However, the present inventors have found that if the above composition is melted and solidified in advance in a low furnace as an evaporation material and evaporated using an electron gun heating method, a deposited film having approximately the same composition can be obtained. confirmed.

In addition, the above composition can also be vaporized by the 7-lash vapor deposition method, which is generally used when vacuum vaporizing a mixture. ! A film can be formed.

Vapor deposition KTL of magnesium oxide, vacuum vapor deposition, and reactive vapor deposition of magnesium can be applied. In the case of vacuum deposition, magnesium oxide is used as the deposition material, and is heated and evaporated with an electron gun.

In the case of reactive vapor deposition, VcW in the vacuum chamber! Metallic magnesium oxide *m is formed while introducing elementary gas. In either case, it is also possible to introduce a small amount of gas such as H2O in order to improve the moisture-proof performance.

Forming a transparent thin film layer by vacuum evaporation method or ion plating method is usually carried out under a vacuum atmosphere of 2 X 1O-3 torr or less, but in order to avoid performance deterioration due to contamination of impurities, it is necessary to create a transparent thin film layer under I X 10 torr or less. It is preferable to carry out the process under an atmosphere of

The transparent film layer of the composition consisting of 5i02, Af203, and MO and the transparent thin film layer of magnesium oxide have a thickness of, respectively, in order to obtain good transparency, flexibility, film continuity, and adhesion. 0.05~α5μm and +
101-(It is best to keep it in the range of 15 μm. If the film thickness is too thin, it will be difficult to obtain a uniform continuous pxK, and if the film thickness is too thick, curling of the transparent synthetic resin body may become a problem, or cracks or peeling of the transparent film may occur. may be more likely to occur.

If the transparent synthetic resin body is one in which a synthetic resin film with heat sealability is laminated on a transparent thin film of magnesium oxide, when this is used as a packaging body, it is preferable because it has heat sealability □. .

Examples of the synthetic resin film having heat-sealability include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-based ionomer, etc., which do not sacrifice transparency.

There are two methods for layering a synthetic resin film with heat-sealing properties: a method that uses glue or an adhesive (dry lamination method), and a method that melts and extrudes a synthetic resin into a film and presses it onto a substrate (extrusion lamination method). .

In the dry lamination method, the adhesive used varies depending on the synthetic resin film, but generally, incyanate adhesives are preferably used.

In extrusion lamination method, 5i02
, AJ? Since an anchoring effect is expressed in the transparent thin film layer of the composition consisting of 203, λ(0 and the transparent thin film layer of magnesium oxide, the organic chicknate system that is usually used,
Anchor treatment using incyanate-based or polyethylene imine-based anchoring agents is no longer necessary. Therefore, the conventional
There is no need to use solvents, and there is no need to degrade the manufacturing work environment or leave organic solvents in the product.

(Example) Examples of the present invention are shown below.

<Example 1> The molar ratio of 5i02, A/203, and CaO was 2:
A 1:1 mixture of oxides was melted and solidified in an electric furnace, then heated and evaporated using an electron gun heating method under a vacuum of 5 x 10 torr to form a mixture of polyethylenetere 7crete (PE).
T) A transparent thin film layer of α05 μm (hereinafter referred to as the first layer of transparent thin!lX shoes) was formed on a film (15 μm thick).

The deposition was performed while monitoring with a crystal film thickness meter so that the film formation rate was about 1008@/see K.

With the vacuum in the vacuum chamber evacuated to 5 x lOtorrK, magnesium oxide with a purity of 99.9% is heated using an electron beam heating method to form the first layer of transparent W! The film thickness is 0.1 on the i film layer.
It was deposited to a thickness of μm. Magnesium oxide was deposited at a rate of about 100 sec K using a crystal oscillator film thickness meter at 72 degrees.

A transparent thin film body was formed by laminating an ethylene vinyl acetate copolymer on a transparent film layer of magnesium oxide by an extrusion lamination method.

The composition of each transparent F3+1 thin layer was analyzed using an X-vein microanalyzer and was found to be approximately the same as the composition of the original mixture.

The formed transparent thin g! Layer adhesion #1 JIS D020
2 was recognized as w1, which was very good.

The light transmittance of the transparent thin film was approximately the same as that of the undeposited film, and the transparency was good.

Moisture permeability is determined by the weight increase (G/
24 hours).

These results! Shown in Table 1IJ1.

<Example 2> In Example I, the thickness of the first transparent thin film layer was set to 0.1
The thickness of transparent #4 thin g layer of μm1 magnesium oxide is Q, 0
The same as in Example 1 except that the thickness was 5 μm.

<Example 3> In Example 1, the first layer is transparent and thin! 5i02 of lX layer
: A/203 : Same as Example 1 except that the molar ratio of CaO was 9:5:5.

Example 4 In Example 3, the thickness of the 11th transparent thin film layer was set to 0.
The thickness of the transparent thin film layer of 1μm1 magnesium oxide is a, 0
The same as in Example 3 except that the thickness was 5 μm.

<Example 5> Example 1 except that SrO was used instead of CaOK in the mixed composition of Example 1 to form the first transparent thin film layer.
It is similar to

<Example 6> CaOVcP in the mixed composition of Example 2? , er, Sr.
The procedure was the same as in Example 2 except that O was used to form the first transparent thin film layer.

<Example 7> The same as Example 3 except that CaOvc in the mixed composition of Example 3 was replaced with SrO to form a first transparent FTA Alvg layer.

<Example 8> Vi Example 4 except that the first transparent thin film layer was formed using SrO instead of CaOK in the mixture composition of Example 4.
It is similar to

<Example 9> The same as Example 1 except that the first transparent thin film layer was formed using BaO instead of CaOK in the mixture composition of Example 1.

<Example 10> The same as Example 2 except that the first transparent #4 thin WX layer was formed using BaO instead of CaOK in the mixture composition of Example 2.

Example 11 The procedure was the same as in Example 3 except that BaO was used instead of CaOK in the mixture composition of Example 3 to form the first transparent WIj film layer.

<Example 12> Vip except that BaO was used instead of CaOVC in the mixture composition of Example 4 to form the 111mth transparent thin film layer.
Same as Example 4.

<Comparative Example 1> Polyethylene terephthalate (PET) film (15
The adhesion, transparency, and moisture permeability of the film (μm thickness) were measured in the same manner as in Example 1.

<Comparative Example 2> Polyethylene terephthalate (PET) film (15
The process is the same as in Example 1 except that only a 0.15 μm transparent thin film layer of magnesium oxide was formed on the 0.15 μm thick transparent thin film layer.

<Comparative Example 3> Polyethylene terephthalate (PET) film (15
/(m thickness) Upper 1c 5i02: A/203: C
Transparent #4ril composition with aO molar ratio of 2:1:1
It is the same as Example 1 except that only the film M (α15 μm thick) was formed.

<Comparative Example 4> In Example 1, 5i02: AI! 203:
It is the same as Example 1 except that the molar ratio of CaO was set to 1N.

Table 1 tiMo's M5 in the umbrella brackets! Indicates the minute.

斡、-◎mark indicates good condition.

(Effects of the Invention) As detailed above, the synthetic resin body having moisture permeability of the present invention does not impair transparency and can obtain extremely good moisture permeability that was previously unobtainable. It can be used as a protective body for an EL element.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of the present invention. Explanation of symbols 1...Synthetic resin base, 2...5i02, A/2
03, transparent thin film layer of composition consisting of MO, 3...
Transparent thin film layer of magnesium oxide, 4... composite rc resin film 0

Claims (1)

[Claims] 1. SiO_2 on at least one side of the transparent synthetic resin substrate
, Al_2O_3, MO (M represents an alkaline earth metal group such as Ca, Sr, Ba, etc.) in molar ratio, (SiO_2
):(Al_2O_3):(MO)=2~9:1~5:
1. A transparent synthetic resin body having moisture permeability resistance, comprising a transparent thin film layer of a composition according to Nos. 1 to 5, and a transparent thin film layer of magnesium oxide formed on the transparent thin film layer. 2. The transparent synthetic resin body is a flexible film-like body with a thickness of 5 to 300 μm, and contains SiO_2, Al_2O_3
, the transparent thin film layer of the composition consisting of MO is 0.05 to 0.5
μm, and the transparent thin film layer of magnesium oxide has a thickness of 0.
．． A transparent synthetic resin body having moisture permeability resistance according to claim 1, which has a moisture permeability of 01 to 0.5 μm. 3. Transparent film layer of magnesium oxide and SiO_2,A
The transparent synthetic resin body having moisture permeability resistance according to claim 1 or 2, wherein the transparent thin film layer of the composition consisting of l_2O_3 and MO is formed by a vacuum deposition method, an ion plating method, or a sputtering method. . 4. The durable material according to claim 1, 2 or 3, wherein the transparent synthetic resin body is obtained by laminating a synthetic resin film having heat sealability on a transparent thin film layer of magnesium oxide. Transparent synthetic resin body with moisture permeability.