JPH04202282A - Ultraviolet-absorbing composition - Google Patents
Ultraviolet-absorbing compositionInfo
- Publication number
- JPH04202282A JPH04202282A JP2332246A JP33224690A JPH04202282A JP H04202282 A JPH04202282 A JP H04202282A JP 2332246 A JP2332246 A JP 2332246A JP 33224690 A JP33224690 A JP 33224690A JP H04202282 A JPH04202282 A JP H04202282A
- Authority
- JP
- Japan
- Prior art keywords
- ultraviolet
- zinc oxide
- synthetic resin
- shielding effect
- absorbing composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011787 zinc oxide Substances 0.000 claims abstract description 14
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 13
- 239000000057 synthetic resin Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 abstract description 18
- -1 polyethylene terephthalate Polymers 0.000 abstract description 8
- 239000002537 cosmetic Substances 0.000 abstract description 7
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 7
- 239000003814 drug Substances 0.000 abstract description 4
- 229940079593 drug Drugs 0.000 abstract description 3
- 230000002688 persistence Effects 0.000 abstract 1
- 238000012216 screening Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 14
- 239000000976 ink Substances 0.000 description 6
- 229920001903 high density polyethylene Polymers 0.000 description 5
- 239000004700 high-density polyethylene Substances 0.000 description 5
- 229920001684 low density polyethylene Polymers 0.000 description 5
- 239000004702 low-density polyethylene Substances 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- SGHZXLIDFTYFHQ-UHFFFAOYSA-L Brilliant Blue Chemical compound [Na+].[Na+].C=1C=C(C(=C2C=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C=2C(=CC=CC=2)S([O-])(=O)=O)C=CC=1N(CC)CC1=CC=CC(S([O-])(=O)=O)=C1 SGHZXLIDFTYFHQ-UHFFFAOYSA-L 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- OCWYEMOEOGEQAN-UHFFFAOYSA-N bumetrizole Chemical compound CC(C)(C)C1=CC(C)=CC(N2N=C3C=C(Cl)C=CC3=N2)=C1O OCWYEMOEOGEQAN-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- UJMBCXLDXJUMFB-GLCFPVLVSA-K tartrazine Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-GLCFPVLVSA-K 0.000 description 1
- 229960000943 tartrazine Drugs 0.000 description 1
- 235000012756 tartrazine Nutrition 0.000 description 1
- 239000004149 tartrazine Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は紫外線吸収性組成物に係るものであって、化粧
料、医薬品等を収納する容器に用いる場合、特に好都合
なものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an ultraviolet absorbing composition, which is particularly advantageous when used in containers for storing cosmetics, medicines, etc.
従来の技術
従来、商品の陳列時や家庭での保管時において、容器内
に収納した化粧料、医薬品等が太陽光、蛍光灯等に含ま
れる紫外線によって変色、劣化するのを防止する方法と
しては、ベンゾフェノン、ベンゾトリアゾール等の有機
化合物系の紫外線吸収剤を、合成樹脂に、Ｑ、 １ｗｔ
％程度配合してなる紫外線吸収性組成物を、容器の材料
として用いるものが知られている。しかしながら、有機
化合物系の紫外線吸収剤は、高い紫外線遮蔽効果を有す
るものの、耐候性が劣り、経時変化し易く、紫外線遮蔽
効果が次第に低下する欠点を有していた。Conventional Technology Conventionally, there has been a method to prevent cosmetics, medicines, etc. stored in containers from discoloring and deteriorating due to sunlight, ultraviolet rays contained in fluorescent lights, etc. when displaying products or storing them at home. , benzophenone, benzotriazole, and other organic compound-based ultraviolet absorbers to synthetic resin, Q, 1wt.
It is known that an ultraviolet absorbing composition containing approximately 50% of UV rays is used as a material for a container. However, although organic compound-based ultraviolet absorbers have a high ultraviolet shielding effect, they have the disadvantage that they have poor weather resistance, tend to change over time, and gradually reduce their ultraviolet shielding effect.
また化粧料、医薬品等の紫外線による変色、劣化を防止
する他の方法としては、有機化合物系の紫外線吸収剤よ
りも安定性の高い無機化合物系の酸化亜鉛を、バインダ
ーに分散させて紫外線遮蔽インクとし、この紫外線遮蔽
インクを、成型した後の容器に塗布する方法が知られて
いる。しかしながら、この方法は容器内部の表面に、イ
ンクとして酸化亜鉛を塗布しただけであるから、表面か
ら剥がれ易（、紫外線遮蔽効果が次第に低下する欠点を
有していた。またこの方法は容器の成型後に紫外線遮蔽
インクの塗布作業を必要とするため、作業工程の増加に
よるコスト高を招く欠点を有していた。Another method for preventing discoloration and deterioration of cosmetics, pharmaceuticals, etc. due to ultraviolet rays is to disperse zinc oxide, an inorganic compound that is more stable than organic compound ultraviolet absorbers, in a binder to make ultraviolet shielding inks. A method is known in which this ultraviolet-shielding ink is applied to a molded container. However, since this method only coats zinc oxide as an ink on the inside surface of the container, it has the drawback that it easily peels off from the surface (and the ultraviolet shielding effect gradually decreases). Since it is necessary to apply an ultraviolet-ray shielding ink afterwards, it has the drawback of increasing costs due to an increase in the number of work steps.
発明が解決しようとする課題
本発明は上述のごとき課題を解決しようとするものであ
って、安定的な無機化合物系の紫外線吸収剤を配合した
紫外線吸収組成物を、化粧料、医薬品等の容器の材料に
用いることによって、紫外線遮蔽インクを塗布する手数
を不要としながら容器内の化粧料等が紫外線によって変
色、劣化するのを防止し、紫外線遮蔽効果を継続的に維
持しようとするものである。Problems to be Solved by the Invention The present invention aims to solve the above-mentioned problems. By using it in materials, it is possible to prevent cosmetics, etc. in the container from discoloring and deteriorating due to ultraviolet rays, while eliminating the need to apply UV-shielding ink, and to maintain the UV-shielding effect continuously. .
課題を解決するための手段
本発明は上述のごとき課題を解決するため成されたもの
で、合成樹脂に、粒子径０．００５μｍ〜００２μｍの
六方晶系の酸化亜鉛を０． ｌｉｔ％〜１、０ｗｔ％配
合したことを特徴とするものであって、紫外線を遮蔽す
る容器の材料に適した紫外線吸収性組成物を提供するも
のである。Means for Solving the Problems The present invention has been made in order to solve the above-mentioned problems, and is made by adding hexagonal zinc oxide having a particle size of 0.005 μm to 0.02 μm to a synthetic resin. The present invention is characterized in that it contains 1.0 wt% of light %, and provides an ultraviolet absorbing composition suitable for use as a material for containers that shield ultraviolet rays.
本発明に用いられる合成樹脂には、例えばポリエチレン
テレフタレート、高密度ポリエチレン、低密度ポリエチ
レン、ポリ塩化ビニル、ポリスチレン、ポリプロピレン
、ポリメチルペンテン、ポリカーボネート等が用いられ
、容器の形状、内容物に応じて使用することができる。Examples of the synthetic resin used in the present invention include polyethylene terephthalate, high-density polyethylene, low-density polyethylene, polyvinyl chloride, polystyrene, polypropylene, polymethylpentene, and polycarbonate, depending on the shape of the container and the contents. can do.
また本発明に用いられる六方晶系の酸化亜鉛は、粒子径
を０００５μｍ〜００２μｍとし、粒子径が０００５μ
ｍ未満では、合成樹脂への配合時に凝集を生じ、合成樹
脂内に均一に分散することができず、粒子径が００２μ
ｍを越えるものは紫外線の遮蔽効果が劣るものとなる。Furthermore, the hexagonal zinc oxide used in the present invention has a particle size of 0005 μm to 002 μm;
If the particle size is less than 0.0 m, agglomeration will occur when blended into the synthetic resin, and the particle size will not be uniformly dispersed in the synthetic resin.
If it exceeds m, the UV shielding effect will be poor.
またこの酸化亜鉛の合成樹脂への配合率は、Ｑ、１ｗｔ
％〜１．０ｗｔ％てあり、Ｑ、１４ｔ％未満では、顕著
な紫外線遮蔽効果を示さず、１． Ｏｖｔ％を越えると
、配合した合成樹脂の透明性が損なわれ、容器内の内容
物の視認確認を妨げるものとなる。In addition, the blending ratio of this zinc oxide to the synthetic resin is Q, 1wt
% to 1.0 wt%, and if Q is less than 14 t%, no significant ultraviolet shielding effect is shown.1. If it exceeds Ovt%, the transparency of the blended synthetic resin will be impaired, making it difficult to visually confirm the contents inside the container.
実施例
次に本発明の最も好ましい実施例について説明する。本
実施例に用いた酸化亜鉛は、粒子径０、００５μｍ〜０
０１５μｍで、比表面積が６０ｍ ２／ｇ、真比重５．
７８、嵩比重０４０、吸油量９２ｍ１／ｇ、屈折率１．
９〜２．０で、色調をホワイトとする酸化亜鉛を用いた
。EXAMPLE Next, the most preferred embodiment of the present invention will be described. The zinc oxide used in this example had a particle size of 0.005 μm to 0.
015μm, specific surface area 60m2/g, true specific gravity 5.
78, bulk specific gravity 040, oil absorption 92 m1/g, refractive index 1.
Zinc oxide having a white color tone with a rating of 9 to 2.0 was used.
そして以下の表１に示すごとく、ポリエチレンテレフタ
レート、高密度ポリエチレン、低密度ポリエチレンの各
々に、配合比率を変えて酸化亜鉛を配合したものを実施
例１〜７とした。As shown in Table 1 below, Examples 1 to 7 were prepared by blending zinc oxide into each of polyethylene terephthalate, high density polyethylene, and low density polyethylene at different blending ratios.
またポリエチレンテレフタレート、高密度ポリエチレン
、低密度ポリエチレンのみのものを、各々比較例１〜３
とした。Comparative Examples 1 to 3 of polyethylene terephthalate, high-density polyethylene, and low-density polyethylene were used, respectively.
And so.
また、ポリエチレンテレフタレートに、２−（５−メチ
ル−２−ヒドロキシフェニル）ベンゾトリアゾール（以
下ＴＮＶＰとする）を配合したものを比較例４、高密度
ポリエチレン、低密度ポリエチレンの各々に、２−（３
−ｔ−ブチル−５−メチル−２−ヒドロキシフェニル）
−５−クロロベンゾトリアゾール（以下ＴＮＶ３２６と
する）を配合したものを比較例５、比較例６とした。In addition, in Comparative Example 4, 2-(5-methyl-2-hydroxyphenyl)benzotriazole (hereinafter referred to as TNVP) was blended with polyethylene terephthalate, 2-(3
-t-butyl-5-methyl-2-hydroxyphenyl)
-5-chlorobenzotriazole (hereinafter referred to as TNV326) was blended as Comparative Example 5 and Comparative Example 6.
まず実施例１、実施例２、実施例３と比較例１、比較例
４について、分光計により波長８００ｎｍまでの範囲で
紫外線の透過率を測定し、この結果を第１図のグラフに
示した。First, for Examples 1, 2, 3, Comparative Examples 1, and 4, the transmittance of ultraviolet rays was measured using a spectrometer in a wavelength range of up to 800 nm, and the results were shown in the graph of Figure 1. .
また、実施例１、実施例２、実施例３、比較例１、比較
例４の紫外線吸収性組成物を材料とする容器に、水とエ
チルアルコールとを混合したものに、ブリリアントブル
ー、タートラジンを用いて着色した内容物を各々収納す
る。そしてこの容器の外部から、キセノンフェードメー
ターとカーボンアークフェードメーターで、各々紫外線
を照射し、内容物に生じた色差を表２に示した。この照
射時間は、キセノンフェードメーターが３０時間で、カ
ーボンアークフェードメーターが２０時間とした。In addition, in a container made of the ultraviolet absorbing composition of Example 1, Example 2, Example 3, Comparative Example 1, and Comparative Example 4, Brilliant Blue and Tartrazine were added to a mixture of water and ethyl alcohol. The colored contents are stored in each case. Then, ultraviolet rays were irradiated from the outside of this container using a xenon fade meter and a carbon arc fade meter, respectively, and the color difference produced in the contents is shown in Table 2. The irradiation time was 30 hours for the xenon fade meter and 20 hours for the carbon arc fade meter.
表２
この結果、ポリエチレンテレフタレートに酸化亜鉛を０
．０５ｖｔ％〜０．３ｗｔ％配合したものは、紫外線吸
収効果を有し、高い遮蔽効果を有することが分かる。Table 2 As a result, 0 zinc oxide was added to polyethylene terephthalate.
．． It can be seen that those containing 0.05vt% to 0.3wt% have an ultraviolet absorption effect and a high shielding effect.
次に実施例４、実施例５と比較例２、比較例５について
、分光計により波長８００ｎｍまでの範囲で紫外線の透
過率を測定し、この結果を第２図のグラフに示した。Next, for Examples 4 and 5 and Comparative Examples 2 and 5, the transmittance of ultraviolet rays was measured using a spectrometer in a wavelength range of up to 800 nm, and the results are shown in the graph of FIG.
この結果、高密度ポリエチレンに、酸化亜鉛を０゜３ｗ
ｔ％〜０．６ｗｔ％配合したものは、顕著な紫外線遮蔽
効果を有することが分かる。As a result, we added 0°3w of zinc oxide to high-density polyethylene.
It can be seen that those containing t% to 0.6wt% have a remarkable ultraviolet shielding effect.
次に実施例６、実施例７と比較例３、比較例６について
、分光計により波長８００ｎｍまでの範囲で紫外線の透
過率を測定し、この結果を第３図のグラフに示した。Next, for Example 6, Example 7, Comparative Example 3, and Comparative Example 6, the transmittance of ultraviolet rays was measured using a spectrometer in a wavelength range of up to 800 nm, and the results are shown in the graph of FIG.
この結果、低密度ポリエチレンに、酸化亜鉛を０、１ｗ
ｔ％〜０．３ｗｔ％配合したものは、顕著な紫外線遮蔽
効果を有し、特に波長２５０ｎｍ〜３００ｎｍにおいて
はＴＮＶ３２６を配合したものよりも高い紫外線遮蔽効
果を有することが分かった。As a result, we added 0.1w of zinc oxide to low-density polyethylene.
It was found that those containing TNV326 at t% to 0.3 wt% had a remarkable ultraviolet shielding effect, and in particular had a higher ultraviolet shielding effect than those containing TNV326 at wavelengths of 250 nm to 300 nm.
なお、上記比較例４．５．６は、各実施例よりも高い紫
外線遮蔽効果を有しているが、この差は僅かである。ま
たこの紫外線遮蔽効果は、各実施例、比較例４〜６とも
に製造の初期の値を示したものであり、前述のごとく、
比較例４〜６は軽時変化によって、紫外線遮蔽効果が次
第に低下することから、時間の経過とともに各実施例の
方が高い紫外線遮蔽効果を有するものとなる。Although Comparative Examples 4, 5, and 6 have a higher ultraviolet shielding effect than each of the Examples, this difference is slight. In addition, this ultraviolet shielding effect shows the value at the initial stage of manufacturing for both Examples and Comparative Examples 4 to 6, and as mentioned above,
In Comparative Examples 4 to 6, the ultraviolet shielding effect gradually decreases due to changes over time, so each example has a higher ultraviolet shielding effect over time.
発明の効果
本発明は上述のごとく、安定的な無機化合物系の紫外線
吸収剤を配合した紫外線吸収組成物を、化粧料等の容器
の材料に用いるから、容器内の化粧料等が紫外線によっ
て変色、劣化するのを防止し、紫外線遮蔽効果を継続的
に維持することができる。Effects of the Invention As described above, the present invention uses a UV absorbing composition containing a stable inorganic compound-based UV absorber as a material for containers for cosmetics, etc., so that the cosmetics, etc. inside the containers are not discolored by ultraviolet rays. , it can prevent deterioration and continuously maintain the ultraviolet shielding effect.
また紫外線遮蔽インクを塗布する手数を不要として、コ
ストの低減を図ることが可能となるものである。Furthermore, it is possible to reduce costs by eliminating the need to apply ultraviolet-shielding ink.
・ 図面は実施例および比較例における紫外線の透過率
の測定結果を示すものであって、第１図は合成樹脂にポ
リエチレンテレフタレートを用いた場合、第２図は合成
樹脂に高密度ポリエチレンを用いた場合、第３図は合成
樹脂に低密度ポリエチレンを用いた場合を示すグラフで
ある。
第 １ 図
会＾権十月ｈ１；ざリエチレンテレフ７レーＬＬＪＩＩ
ＩＩｌ九４名第 ２ 図- The drawings show the measurement results of ultraviolet transmittance in Examples and Comparative Examples. Figure 1 shows the results when polyethylene terephthalate was used as the synthetic resin, and Figure 2 shows the results when high-density polyethylene was used as the synthetic resin. In this case, FIG. 3 is a graph showing the case where low density polyethylene is used as the synthetic resin. 1st illustration ＾ Gon October h1;
IIl 94 people Figure 2
Claims (1)
ｍの六方晶系の酸化亜鉛を０．１ｗｔ％〜１．０ｗｔ％
配合して成ることを特徴とする紫外線吸収性組成物。(1) Particle size of 0.005 μm to 0.02 μm in synthetic resin
m hexagonal zinc oxide from 0.1 wt% to 1.0 wt%
An ultraviolet absorbing composition characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2332246A JP2885509B2 (en) | 1990-11-28 | 1990-11-28 | UV absorbing composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2332246A JP2885509B2 (en) | 1990-11-28 | 1990-11-28 | UV absorbing composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04202282A true JPH04202282A (en) | 1992-07-23 |
| JP2885509B2 JP2885509B2 (en) | 1999-04-26 |
Family
ID=18252807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2332246A Expired - Fee Related JP2885509B2 (en) | 1990-11-28 | 1990-11-28 | UV absorbing composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2885509B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002309100A (en) * | 2001-04-12 | 2002-10-23 | Hakusui Tech Co Ltd | Ultraviolet ray shielding film |
-
1990
- 1990-11-28 JP JP2332246A patent/JP2885509B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002309100A (en) * | 2001-04-12 | 2002-10-23 | Hakusui Tech Co Ltd | Ultraviolet ray shielding film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2885509B2 (en) | 1999-04-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |