JP2005320256A - Antibacterial molded resin article and antibacterial glitter to be used therein - Google Patents

Antibacterial molded resin article and antibacterial glitter to be used therein Download PDF

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JP2005320256A
JP2005320256A JP2004137124A JP2004137124A JP2005320256A JP 2005320256 A JP2005320256 A JP 2005320256A JP 2004137124 A JP2004137124 A JP 2004137124A JP 2004137124 A JP2004137124 A JP 2004137124A JP 2005320256 A JP2005320256 A JP 2005320256A
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antibacterial
glitter
resin
thin film
silver
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Harumichi Oda
晴道 織田
Yukiyoshi Soma
幸良 相馬
Toshiyuki Matsuda
俊行 松田
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Reiko Co Ltd
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Reiko Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an antibacterial glitter having antibacterial property and electromagnetic shielding property as well as glittering property and keeping the antibacterial property for a long period, and provide an antibacterial molded resin article produced by using the glitter. <P>SOLUTION: The antibacterial glitter is a crushed piece of a laminate having heat-resistant resin layers on both outer surfaces and one or more silver or copper thin film layers at least in the laminate. The total thickness of the silver or copper thin film layers is 40-5,000 nm and the thickness of the heat-resistant resin layer is 0.4-100μm. This invention further provides an antibacterial molded resin article mixed with the antibacterial glitter. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、抗菌性樹脂成形品及びそれに使用する抗菌性グリッターに関するものである。
詳細には、光輝性とともに抗菌性や電磁波遮蔽性をも兼ね備え、しかも抗菌性を長期間持続することができる抗菌性グリッター、及び該グリッターを使用して得られる多数の点状や線状等の細かい光輝性、抗菌性、及び電磁波遮蔽性を有する樹脂成形品に関し、フイルムやシート、洗面器、バケツ、ゴミ箱、椅子、弁当箱、コップ等の家庭用品、パソコンやテレビ等の電化製品の筐体、携帯電話の筐体、コンパクトケース等の化粧品用容器、便器の便座等のトイレタリー用品、水槽に入れる置物や餌入れ等のペット用品、眼鏡フレーム、玩具等に使用すれば特に有益な、抗菌性樹脂成形品及びそれに使用する抗菌性グリッターに関する。
The present invention relates to an antibacterial resin molded article and an antibacterial glitter used therein.
In detail, the antibacterial glitter which has antibacterial property and electromagnetic wave shielding property as well as glitter and can maintain the antibacterial property for a long period of time, and a number of dot-like and linear shapes obtained by using the glitter For resin molded products with fine luster, antibacterial properties, and electromagnetic wave shielding properties, film, sheets, washbasins, buckets, trash cans, chairs, lunch boxes, cups and other household items, PCs and televisions Antibacterial, especially useful when used in mobile phone casings, cosmetic containers such as compact cases, toiletries such as toilet seats, pets such as figurines and food containers, eyeglass frames, toys, etc. The present invention relates to a resin molded product and an antibacterial glitter used for the resin molded product.

一般に多数の点状や線状等の細かい光輝性を有するフィルム、シート、その他の樹脂成形品を製造する際に使用されるグリッターが知られている。
特許文献1には、樹脂成形品製造用樹脂ペレット中に、厚さが200〜50000Å(20〜5000nm)の金属薄膜層の片面又は両面に厚さが0.1〜100μmの耐熱性樹脂層を備えた積層体の砕片であるグリッターを混入した樹脂成形品製造用光輝性樹脂ペレットが記載されている。
そして、上記グリッターの金属薄膜層は、Al(アルミニウム)、Ag(銀)、Au(金)、Cu(銅)、Ni(ニッケル)Zn(亜鉛)等の各種金属、合金等が使用できる旨の記載もある。
特開2000−239394号公報
In general, glitter used for producing a large number of fine brilliant films such as dots and lines, sheets, and other resin molded products is known.
In Patent Document 1, a heat-resistant resin layer having a thickness of 0.1 to 100 μm is formed on one side or both sides of a metal thin film layer having a thickness of 200 to 50000 mm (20 to 5000 nm) in a resin pellet for producing a resin molded product. A glittering resin pellet for producing a resin molded product in which glitter, which is a fragment of the provided laminate, is mixed is described.
The metal thin film layer of the glitter can use various metals such as Al (aluminum), Ag (silver), Au (gold), Cu (copper), Ni (nickel) Zn (zinc), alloys, and the like. There is also a description.
JP 2000-239394 A

しかし、上記従来のグリッター及び該グリッターを使用して得る樹脂成形品には、以下に示す欠点があった。
(1)金属薄膜層として、Ag(銀)、又はCu(銅)以外の各種金属を使用した場合には、グリッターは光輝性は有するものの、抗菌性を有するものではなく、従って、該グリッターを使用して得る樹脂成形品も抗菌性を有するものとはならなかった。
(2)金属薄膜層にAg(銀)、又はCu(銅)を使用したとしても、該薄膜層の厚さが40nmより薄い場合や樹脂成形品中のグリッターの含有量が0.5重量%未満の場合には、グリッター及びそれを使用して製造した樹脂成形品ともに、光輝性は有するものの、抗菌性をほとんど有しなかった。
(3)金属薄膜層にAg(銀)、又はCu(銅)を使用して、該薄膜層の厚さを40nm以上で、樹脂ペレット中のグリッターの含有量を0.5重量%以上としたときであっても、耐熱性樹脂層が片面にしか形成されていない場合や耐熱性樹脂層が両面に形成されていても耐熱性樹脂層の厚さが0.4μmより薄い場合には、耐熱性が不充分なため、Ag(銀)、又はCu(銅)薄膜層にクラックが発生して光輝性が低下したり、あるいはAg(銀)、又はCu(銅)薄膜層と耐熱性樹脂層との間で剥離してしまい、Ag(銀)、又はCu(銅)が容易に腐食したり、溶出したりして抗菌性を長期間持続することができなかった。
However, the conventional glitter and the resin molded product obtained by using the glitter have the following drawbacks.
(1) When various metals other than Ag (silver) or Cu (copper) are used as the metal thin film layer, although the glitter has glitter, it does not have antibacterial properties. The resin molded product obtained by use did not have antibacterial properties.
(2) Even if Ag (silver) or Cu (copper) is used for the metal thin film layer, the thickness of the thin film layer is less than 40 nm, or the content of glitter in the resin molded product is 0.5% by weight. In the case of less than 1, the glitter and the resin molded product produced by using the glitter both had glitter, but had almost no antibacterial property.
(3) Ag (silver) or Cu (copper) is used for the metal thin film layer, the thickness of the thin film layer is 40 nm or more, and the content of glitter in the resin pellet is 0.5 wt% or more. Even when the heat-resistant resin layer is formed only on one side, or the heat-resistant resin layer is formed on both sides and the thickness of the heat-resistant resin layer is thinner than 0.4 μm, Insufficient properties cause cracks in the Ag (silver) or Cu (copper) thin film layer, resulting in decreased glitter, or Ag (silver) or Cu (copper) thin film layer and a heat resistant resin layer. And Ag (silver) or Cu (copper) was easily corroded or eluted, and the antibacterial property could not be maintained for a long time.

本発明は、上記全ての欠点を除去したものであり、光輝性とともに抗菌性や電磁波遮蔽性をも兼ね備え、しかも抗菌性を長期間持続することができる抗菌性グリッター、及びそれを使用して得る抗菌性樹脂成形品を提供するものである。   The present invention eliminates all the above-mentioned drawbacks, has antibacterial properties and electromagnetic wave shielding properties as well as glitter, and is obtained by using the antibacterial glitter that can maintain the antibacterial properties for a long period of time. An antibacterial resin molded product is provided.

[1]本発明は、両外側に耐熱性樹脂層が形成され、かつ少なくとも内側に銀又は銅薄膜層が1層以上形成された積層体の砕片であるグリッターにおいて、銀又は銅薄膜層の合計厚さが40〜5000nmであること、及び耐熱性樹脂層の厚さが0.4〜100μmであることを特徴とする抗菌性グリッターである。
[2]本発明は、樹脂に上記[1]記載の抗菌性グリッターが混入されていることを特徴とする抗菌性樹脂成形品である。
[1] The present invention provides a total of silver or copper thin film layers in a glitter which is a fragment of a laminate in which a heat resistant resin layer is formed on both outer sides and at least one silver or copper thin film layer is formed on the inner side. The antibacterial glitter is characterized in that the thickness is 40 to 5000 nm and the thickness of the heat resistant resin layer is 0.4 to 100 μm.
[2] The present invention is an antibacterial resin molded product in which the antibacterial glitter described in [1] is mixed in a resin.

本発明の抗菌性グリッターは、両外側に厚さが0.4〜100μmの耐熱性樹脂層が形成され、少なくとも内側に銀又は銅薄膜層が1層以上形成され、かつ銀又は銅薄膜層の合計厚さ(銀又は銅薄膜層が1層である場合には、1層の厚さ)が40〜5000nmである積層体の砕片であるので、光輝性とともに抗菌性や電磁波遮蔽性をも兼ね備え、しかも抗菌性を長期間持続することができるものである。
従って、本発明の抗菌性グリッターを使用して得る抗菌性樹脂成形品も、光輝性とともに抗菌性や電磁波遮蔽性をも兼ね備え、しかも抗菌性を長期間持続することができ、上記抗菌性グリッターの有する効果と同様の効果を有するものとなる。
In the antibacterial glitter of the present invention, a heat resistant resin layer having a thickness of 0.4 to 100 μm is formed on both outer sides, at least one silver or copper thin film layer is formed on the inner side, and the silver or copper thin film layer Since it is a fragment of a laminate having a total thickness (when the silver or copper thin film layer is one layer, the thickness of one layer) of 40 to 5000 nm, it has both antibacterial properties and electromagnetic wave shielding properties as well as glitter. Moreover, antibacterial properties can be maintained for a long time.
Therefore, the antibacterial resin molded product obtained by using the antibacterial glitter of the present invention has both the antibacterial property and the electromagnetic wave shielding property as well as the glitter, and can also maintain the antibacterial property for a long period of time. It has the same effect as the effect it has.

本発明の抗菌性樹脂成形品は、混入されている本発明の抗菌性グリッターが銀又は銅薄膜層と耐熱性樹脂層を備えた積層体の砕片であり、比重が軽いので、該抗菌性樹脂成形品の製造時に抗菌性グリッターを樹脂中に分散させる際に、容器の底に溜ることもなく、攪拌しても均一な分散が容易で、塊が発生することもなく、得られた抗菌性樹脂成形品も抗菌性グリッターが均一に分散している。
また、樹脂成形品を製造する際に原料として使用する樹脂成形品製造用樹脂ペレットに、本発明の抗菌性グリッターをあらかじめ混入して、抗菌性の樹脂成形品製造用樹脂ペレットを製造する場合にも、上記抗菌性樹脂成形品の製造時の効果と同様の効果を有する。
従って、抗菌性の樹脂成形品製造用樹脂ペレットを使用して抗菌性樹脂成形品を製造する際にも、溶融、攪拌する際に抗菌性グリッターが速やかに、かつ均一に分散するので、できあがった抗菌性樹脂成形品も抗菌性グリッターが均一に分散しており、従って光輝性も均一でばらつきのない外観が得られるとともに、抗菌性も均一でばらつきのないものとなる。
The antibacterial resin molded product of the present invention is a mixture of the antibacterial glitter of the present invention mixed with a silver or copper thin film layer and a heat resistant resin layer, and has a low specific gravity. When antibacterial glitter is dispersed in the resin during the production of molded products, it does not accumulate at the bottom of the container, it is easy to disperse even when stirred, and no agglomeration occurs. Antibacterial glitter is evenly dispersed in resin molded products.
In addition, when the antibacterial glitter of the present invention is mixed in advance with resin pellets for manufacturing resin molded products used as raw materials when manufacturing resin molded products, the resin pellets for manufacturing antibacterial resin molded products are manufactured. Has the same effect as that of the antibacterial resin molded product.
Therefore, when producing antibacterial resin molded products using resin pellets for the production of antibacterial resin molded products, antibacterial glitter is quickly and uniformly dispersed when melted and stirred. In the antibacterial resin molded product, the antibacterial glitter is uniformly dispersed, so that the appearance is uniform and uniform, and the antibacterial property is uniform and uniform.

さらに、本発明の抗菌性グリッターは、積層体の両外側に銀又は銅薄膜層のいわば支持体としての耐熱性樹脂層が形成されているので、抗菌性グリッターが細く短い糸状である場合であっても、抗菌性樹脂成形品製造時の溶融、攪拌、混合工程で抗菌性グリッターの形状が損なわれたり、その為に光輝性が損なわれたりすることがない。   Further, the antibacterial glitter of the present invention is a case where the antibacterial glitter is in the form of a thin and short thread because the heat-resistant resin layer as a support of the silver or copper thin film layer is formed on both outer sides of the laminate. However, the shape of the antibacterial glitter is not impaired in the melting, stirring, and mixing steps during the production of the antibacterial resin molded article, and therefore the glitter is not impaired.

本発明の抗菌性グリッターは、両外側に厚さが0.4〜100μmの耐熱性樹脂層が形成され、少なくとも内側に銀又は銅薄膜層が1層以上形成され、かつ銀又は銅薄膜層の合計厚さが40〜5000nmである積層体の砕片であり、光輝性はもちろん抗菌性や電磁波遮蔽性をも有している。
そして、本発明の抗菌性グリッターは、該グリッターを樹脂に混入することにより得られる本発明の抗菌性樹脂成形品に光輝性とともに抗菌性や電磁波遮蔽性をも付与するものである。
本発明の抗菌性グリッターを樹脂に混入して、本発明の抗菌性樹脂成形品を得る方法としては、樹脂成形品製造用樹脂ペレットと本発明の抗菌性グリッターを混合して、溶融、攪拌、成形して、直接本発明の抗菌性樹脂成形品を製造する方法と、樹脂成形品製造用樹脂ペレットと本発明の抗菌性グリッターを混合して、溶融、攪拌後、押出しカットして、一旦抗菌性を有する樹脂成形品製造用光輝性樹脂ペレットを製造し、さらに、該樹脂成形品製造用光輝性樹脂ペレットをそのまま使用するか、あるいは抗菌性グリッターを混入していない樹脂成形品製造用樹脂ペレットをさらに混合したものを使用して、溶融、攪拌、成形して、本発明の抗菌性樹脂成形品を製造する方法がある。
In the antibacterial glitter of the present invention, a heat resistant resin layer having a thickness of 0.4 to 100 μm is formed on both outer sides, at least one silver or copper thin film layer is formed on the inner side, and the silver or copper thin film layer It is a fragment of a laminate having a total thickness of 40 to 5000 nm and has antibacterial properties and electromagnetic wave shielding properties as well as glitter.
The antibacterial glitter of the present invention imparts antibacterial properties and electromagnetic shielding properties to the antibacterial resin molded product of the present invention obtained by mixing the glitter into a resin.
As a method of obtaining the antibacterial resin molded product of the present invention by mixing the antibacterial glitter of the present invention into the resin, the resin pellet for resin molded product production and the antibacterial glitter of the present invention are mixed, melted, stirred, A method for directly producing the antibacterial resin molded product of the present invention by molding, mixing resin pellets for resin molded product production and the antibacterial glitter of the present invention, melting, stirring, extrusion cutting, and once antibacterial Resin resin pellets for producing resin molded products, which are used for producing resin molded products having the same properties, and further use the resin resin molded product glitter resin pellets as they are or are not mixed with antibacterial glitter There is a method for producing the antibacterial resin molded product of the present invention by melting, stirring and molding using a further mixed product.

上記積層体の構成は、両外側に厚さが0.4〜100μmの耐熱性樹脂層が形成され、少なくとも内側に銀又は銅薄膜層が1層以上形成され、かつ銀又は銅薄膜層の合計厚さが40〜5000nmである積層体であれば特に制限はなく、積層体の内側に樹脂層が1層あるいは2層以上形成されていてもよく、また銀又は銅薄膜層が2層以上形成されていてももちろんよい。
上記積層体の具体的な構成、及び製造方法としては、例えば、離型性を有する長尺のプラスチックフイルムの離型性面上に、コーティング法による耐熱性樹脂層、真空蒸着法等の薄膜生成法による銀又は銅薄膜層、及びコーティング法による耐熱性樹脂層を順次形成したものをプラスチックフイルムから一体として剥離して形成する方法により得られる耐熱性樹脂層/銀又は銅薄膜層/耐熱性樹脂層からなる積層体等が例示できる。
さらに、耐熱性樹脂層として離型性を有しない長尺のプラスチックフイルムを使用し、該フイルム上に、真空蒸着法等の薄膜生成法による銀又は銅薄膜層を形成したものを2枚準備し、プラスチックフイルム側を外側にして接着剤による接着層で貼り合わせて形成する方法により得られる耐熱性樹脂層/銀又は銅薄膜層/接着層/銀又は銅薄膜層/耐熱性樹脂層からなる積層体、同様にプラスチックフイルム上に銀又は銅薄膜層を形成したものの銀又は銅薄膜層面に接着層を介してプラスチックフイルムを貼り合わせて得られる耐熱性樹脂層/銀又は銅薄膜層/接着層/耐熱性樹脂層からなる積層体、プラスチックフイルムの片面又は両面にコーティング法による樹脂層、真空蒸着法等の薄膜生成法による銀又は銅薄膜層、コーティング法による耐熱性樹脂層をそれぞれ順次形成した積層体、プラスチックフイルムの片面に、真空蒸着法等の薄膜生成法による銀又は銅薄膜層、コーティング法による耐熱性樹脂層を順次形成した積層体等も例示できる。
そして、上記の形成方法により得られた積層体をカット、破砕あるいは打抜きする方法等により積層体を砕片とすることで、本発明の抗菌性グリッターとすることができる。
The laminated body has a structure in which a heat-resistant resin layer having a thickness of 0.4 to 100 μm is formed on both outer sides, one or more silver or copper thin film layers are formed at least on the inner side, and the total of the silver or copper thin film layers There is no particular limitation as long as the laminate has a thickness of 40 to 5000 nm, and one or more resin layers may be formed inside the laminate, and two or more silver or copper thin film layers may be formed. Of course it is good.
As a specific configuration and manufacturing method of the laminate, for example, a heat-resistant resin layer by a coating method, a thin film formation such as a vacuum deposition method on a release surface of a long plastic film having a release property Heat-resistant resin layer / silver or copper thin-film layer / heat-resistant resin obtained by a method in which a silver or copper thin-film layer formed by a coating method and a heat-resistant resin layer formed by a coating method are sequentially peeled off from a plastic film. A laminate composed of layers can be exemplified.
In addition, a long plastic film having no releasability was used as the heat-resistant resin layer, and two sheets of silver or copper thin film layers formed by a thin film production method such as vacuum deposition were prepared on the film. Lamination made of heat-resistant resin layer / silver or copper thin film layer / adhesive layer / silver or copper thin film layer / heat-resistant resin layer obtained by a method in which the plastic film side is bonded and formed with an adhesive layer made of an adhesive Heat resistant resin layer / silver or copper thin film layer / adhesive layer / adhesive layer obtained by laminating a plastic film through an adhesive layer on the surface of the silver or copper thin film layer in the same manner. For laminates composed of heat-resistant resin layers, plastic layers on one or both sides of plastic films, silver or copper thin film layers by thin film production methods such as vacuum deposition, and coating methods Examples include laminates in which heat-resistant resin layers are sequentially formed, silver or copper thin film layers by a thin film formation method such as vacuum deposition, and heat-resistant resin layers by coating method are sequentially formed on one side of a plastic film. it can.
And it can be set as the antibacterial glitter of this invention by making a laminated body into fragments by the method of cutting, crushing, or punching out the laminated body obtained by said formation method.

銀又は銅薄膜層は、両外側に後で述べる耐熱性樹脂層が形成された積層体の内側に1層以上形成され、該積層体を砕片したグリッターに光輝性はもちろん抗菌性や電磁波遮蔽性をも付与するものである。
そして、樹脂に該グリッターを混入した本発明の抗菌性樹脂成形品にも光輝性はもちろん抗菌性や電磁波遮蔽性をも付与するものである。
上記の通り、本発明の抗菌性グリッターは、耐熱性や形状安定性を向上させるため、銀又は銅薄膜層の両外側には耐熱性樹脂層が形成されているので、銀又は銅薄膜層が露出している部分は、グリッターの断面部分のみとなっている。
このため、銀又は銅薄膜層の腐食が生じ難く、またグリッターの断面から銀又は銅が徐々にしか溶出しないため抗菌性が長期間持続するのである。
One or more silver or copper thin film layers are formed on the inner side of a laminate in which heat resistant resin layers described later are formed on both outer sides, and the glitter obtained by smashing the laminate has antibacterial and electromagnetic shielding properties as well as glitter. Is also given.
The antibacterial resin molded product of the present invention in which the glitter is mixed into the resin is imparted with antibacterial properties and electromagnetic wave shielding properties as well as glitter.
As described above, since the antibacterial glitter of the present invention improves heat resistance and shape stability, a heat resistant resin layer is formed on both outer sides of the silver or copper thin film layer. The exposed part is only the cross section of the glitter.
For this reason, corrosion of the silver or copper thin film layer hardly occurs, and since the silver or copper elutes only gradually from the cross section of the glitter, the antibacterial property lasts for a long time.

銀又は銅薄膜層は、真空蒸着法、スパッタリング法、イオンプレーティング法等の従来公知の薄膜生成法により形成することができる。
そして、積層体に形成される銀又は銅薄膜層の合計厚さ(銀又は銅薄膜層が1層である場合には、1層の厚さ)は、40〜5000nm、好ましくは100〜1000nm程度設けるのが適当である。
銀又は銅薄膜層の厚さが40nmより薄いと、抗菌性が不充分となりやすい。
また、5000nmより厚いと、グリッター製造時のカット、破砕あるいは打抜きがスムースにでき難くなるので好ましくない。
The silver or copper thin film layer can be formed by a conventionally known thin film production method such as a vacuum deposition method, a sputtering method, or an ion plating method.
And the total thickness (when the silver or copper thin film layer is one layer) of the silver or copper thin film layer formed in the laminate is 40 to 5000 nm, preferably about 100 to 1000 nm. It is appropriate to provide it.
When the thickness of the silver or copper thin film layer is thinner than 40 nm, the antibacterial property tends to be insufficient.
On the other hand, if it is thicker than 5000 nm, it is difficult to cut, crush or punch at the time of manufacturing the glitter.

積層体の両外側に形成されている耐熱性樹脂層は、積層体の内側に形成されている銀又は銅薄膜層を、樹脂ペレットや樹脂成形品の製造時における溶融工程の熱から保護したり、銀又は銅薄膜層の腐食を防いで、銀又は銅薄膜層の光輝性、抗菌性、及び電磁波遮蔽性の低下を防止するものである。   The heat-resistant resin layer formed on both outer sides of the laminate protects the silver or copper thin film layer formed on the inner side of the laminate from the heat of the melting process when manufacturing resin pellets and resin molded products. The silver or copper thin film layer is prevented from being corroded, and the silver, copper thin film layer is prevented from being deteriorated in glitter, antibacterial properties, and electromagnetic wave shielding properties.

耐熱性樹脂層には、例えば、ポリエチレンテレフタレート等のポリエステル系樹脂、アクリル系樹脂、エポキシ系樹脂、メラミン系樹脂、ポリイミド系樹脂、ポリアミドイミド系樹脂等の熱硬化性樹脂が好ましく使用できる。
これらの熱硬化性樹脂は、単体のものであってもよくあるいはそれらの混合のものであってもよい。
耐熱性樹脂層の形成方法は、上記樹脂をリバースコート法、ダイコート法、グラビアコート法等の従来公知のコーティング法で形成してもよく、また上記樹脂をフイルム状にしたプラスチックフイルムをそのまま耐熱性樹脂層として使用してもよい。
For the heat-resistant resin layer, for example, a thermosetting resin such as a polyester resin such as polyethylene terephthalate, an acrylic resin, an epoxy resin, a melamine resin, a polyimide resin, or a polyamideimide resin can be preferably used.
These thermosetting resins may be a simple substance or a mixture thereof.
The heat-resistant resin layer may be formed by a conventional coating method such as a reverse coating method, a die coating method, or a gravure coating method. Alternatively, a plastic film in which the resin is formed into a film is directly heat-resistant. It may be used as a resin layer.

耐熱性樹脂層には、染料や顔料等の着色剤を混入してもよく、そうすることで様々な色彩の光輝性を現出させることができる。
例えば、両面の耐熱性樹脂層に同色の染料や顔料等の着色剤を混入した場合には、両面同色の光輝性を現出でき、また、両面の耐熱性樹脂層にそれぞれ異色の染料や顔料等の着色剤を入れた場合には、両面異色の光輝性を現出でき、さらに、片面の耐熱性樹脂層にのみ染料や顔料等の着色剤を入れた場合には、片面が着色した光輝性、他の片面は金属そのものの光輝性を現出することができる。
また、耐熱性樹脂層とは別に、樹脂層に染料や顔料等の着色剤を混入した着色層を積層体の内側に形成することにより、上記と同様の効果を得ることもできる。
Coloring agents such as dyes and pigments may be mixed in the heat-resistant resin layer, so that glittering properties of various colors can be exhibited.
For example, when colorants such as dyes and pigments of the same color are mixed in the heat-resistant resin layers on both sides, the same color glossiness can be exhibited on both sides, and different color dyes and pigments can be applied to the heat-resistant resin layers on both sides. If a coloring agent such as a dye is added to only the heat-resistant resin layer on one side, the glossy color on one side is obtained. The other side can reveal the glitter of the metal itself.
In addition to the heat-resistant resin layer, the same effect as described above can be obtained by forming a colored layer in which a colorant such as a dye or pigment is mixed in the resin layer inside the laminate.

耐熱性樹脂層の厚さは、0.4〜100μmが好ましい。
耐熱性樹脂層の厚さが0.4μmより薄いと、耐熱性が不充分なため、銀又は銅薄膜層にクラックが発生して光輝性が低下したり、あるいは銀又は銅薄膜層と耐熱性樹脂層との間で剥離してしまい、銀又は銅薄膜層が容易に腐食したり、溶出したりして抗菌性を長期間持続することができない。
耐熱性樹脂層の厚さが100μmより厚いと、積層体の金属光沢が不充分になり易く、さらに、積層体のカット、破砕あるいは打抜きがスムースにでき難くなる。
The thickness of the heat resistant resin layer is preferably 0.4 to 100 μm.
If the thickness of the heat-resistant resin layer is less than 0.4 μm, the heat resistance is insufficient, so that cracks occur in the silver or copper thin film layer, resulting in decreased glitter, or heat resistance with the silver or copper thin film layer. The anti-bacterial property cannot be maintained for a long period of time due to peeling between the resin layer and the silver or copper thin film layer being easily corroded or eluted.
When the thickness of the heat-resistant resin layer is greater than 100 μm, the metallic luster of the laminate is likely to be insufficient, and furthermore, it is difficult to smoothly cut, crush or punch the laminate.

以上の通り、本発明の抗菌性グリッターは、両外側に耐熱性樹脂層が形成され、かつ少なくとも内側に銀又は銅薄膜層が1層以上形成された積層体の砕片とするとともに、銀又は銅薄膜層の合計厚さを40〜5000nm、耐熱性樹脂層の厚さを0.4〜100μmとすることで、はじめて、光輝性、抗菌性、及び電磁波遮蔽性を兼ね備えたものとなるばかりでなく、銀又は銅薄膜層の腐食が生じ難く、またグリッターの断面から銀又は銅が徐々にしか溶出しないため、抗菌性を長期間持続することができるものとなるのである。   As described above, the antibacterial glitter of the present invention is a fragment of a laminate in which a heat-resistant resin layer is formed on both outer sides and at least one silver or copper thin film layer is formed on the inner side. The total thickness of the thin film layer is 40 to 5000 nm, and the thickness of the heat-resistant resin layer is 0.4 to 100 μm, so that not only the combination of glitter, antibacterial properties, and electromagnetic wave shielding properties is achieved. Further, corrosion of the silver or copper thin film layer hardly occurs, and since silver or copper elutes only gradually from the cross section of the glitter, the antibacterial property can be maintained for a long time.

本発明の抗菌性グリッターは、両外側に耐熱性樹脂層が形成され、かつ少なくとも内側に銀又は銅薄膜層が1層以上形成された構成の積層体からなるので、抗菌性樹脂成形品及び樹脂成形品製造用光輝性樹脂ペレット製造時の溶融、攪拌、混合工程でグリッターの形状が損なわれたり、その為に光輝性が損なわれたりすることがない。
さらに、上記樹脂成形品製造用光輝性樹脂ペレットを原材料として抗菌性樹脂成形品を製造する際にも、溶融、攪拌、混合工程で上記と同様の効果が得られる。
Since the antibacterial glitter of the present invention comprises a laminate having a structure in which a heat-resistant resin layer is formed on both outer sides and at least one silver or copper thin film layer is formed on the inner side, the antibacterial resin molded article and resin The glitter shape is not impaired in the melting, stirring, and mixing steps during the production of the glitter resin pellets for manufacturing molded articles, and therefore the glitter is not impaired.
Furthermore, also when manufacturing an antibacterial resin molded product using the glitter resin pellet for manufacturing the resin molded product as a raw material, the same effects as described above can be obtained in the melting, stirring, and mixing steps.

積層体からグリッターを得る方法としては、例えば、積層体を0.05mm〜5mm幅にスリットして糸状にしてこれを適宜の長さ例えば0.05mm〜200mmにカットする方法、ハンマーミル、ボールミル、ニーダー等を用いる破砕方法、トムソン刃による打抜き方法等を採用することができる。   As a method of obtaining glitter from the laminate, for example, a method of slitting the laminate to a width of 0.05 mm to 5 mm to form a thread and cutting it to an appropriate length, for example, 0.05 mm to 200 mm, a hammer mill, a ball mill, A crushing method using a kneader or the like, a punching method using a Thomson blade, or the like can be employed.

本発明の抗菌性グリッターは、上記のように抗菌性樹脂成形品の原料としての使用にのみ限られるものではなく、例えば水の浄化を目的に、該グリッターを水に分散して使用するなど、本発明の抗菌性グリッターだけで使用しても、もちろん構わない。   The antibacterial glitter of the present invention is not limited to the use as a raw material of the antibacterial resin molded article as described above, for example, for the purpose of purifying water, using the glitter dispersed in water, etc. Of course, the antibacterial glitter of the present invention may be used alone.

本発明の抗菌性樹脂成形品は、本発明の抗菌性グリッターを樹脂に混入することにより得られる。
そして、得られた本発明の抗菌性樹脂成形品は、光輝性とともに抗菌性や電磁波遮蔽性をも有し、しかも抗菌性を長期間持続することができるものとなる。
前記した通り、本発明の抗菌性樹脂成形品を得る方法としては、樹脂成形品製造用樹脂ペレットと本発明の抗菌性グリッターを混合して、溶融、攪拌、成形して、直接本発明の抗菌性樹脂成形品を製造する方法と、樹脂成形品製造用樹脂ペレットと本発明の抗菌性グリッターを混合して、溶融、攪拌後、押出しカットして、一旦抗菌性を有する樹脂成形品製造用光輝性樹脂ペレットを製造し、さらに、該樹脂成形品製造用光輝性樹脂ペレットをそのまま使用するか、あるいは抗菌性グリッターを混入していない樹脂成形品製造用樹脂ペレット(マスターペレット)をさらに混合したものを使用して、溶融、攪拌、成形して、本発明の抗菌性樹脂成形品を製造する方法がある。
The antibacterial resin molded product of the present invention can be obtained by mixing the antibacterial glitter of the present invention into a resin.
The obtained antibacterial resin molded article of the present invention has both antibacterial properties and electromagnetic wave shielding properties as well as glitter, and can maintain the antibacterial properties for a long period of time.
As described above, the antibacterial resin molded product of the present invention can be obtained by mixing the resin pellets for manufacturing a resin molded product and the antibacterial glitter of the present invention, melting, stirring and molding, and then directly A method for producing a resin molded article, a resin pellet for producing a resin molded article and the antibacterial glitter of the present invention are mixed, melted, stirred, extruded and cut, and once a glitter for producing a resin molded article having antibacterial properties Manufactured resin resin pellets, and further uses the resin molded product glitter resin pellets as they are, or further mixed resin molded product resin pellets (master pellets) that do not contain antibacterial glitter There is a method for producing the antibacterial resin molded product of the present invention by melting, stirring and molding using the above.

樹脂成形品製造用光輝性樹脂ペレットの原料になる樹脂とグリッターを溶融、攪拌、混合するには公知の方法を採用することができ、例えば、バンバリーミキサー、ゴムロール機、ニーダー、一軸もしくは二軸押出機等を用いて、溶融、攪拌、混合することができる。   Known methods can be used to melt, stir and mix the resin and glitter used as the raw material for the glitter resin pellets for the production of resin molded products. For example, Banbury mixer, rubber roll machine, kneader, single screw or twin screw extrusion It can be melted, stirred and mixed using a machine or the like.

さらに、溶融した状態のものから樹脂成形品製造用光輝性樹脂ペレットを得るには公知の方法を採用することができ、例えば、溶融した状態でノズルから押出して排出し、ストランド状にしたものをストランドカッターによりカットしてペレット化する方法、溶融した状態でノズルから押出して排出したものをホットカッターによりカットしてペレット化する方法、シート状に押出して排出したものをシートカッターによりカットしてペレット化する方法等が挙げられる。
あるいは溶融した状態のものを固化させてからカッターでカットしてもよい。
Furthermore, a known method can be adopted to obtain a glittering resin pellet for producing a resin molded product from a molten state. For example, a molten resin is extruded from a nozzle and discharged to form a strand. A method of cutting and pelletizing with a strand cutter, a method of cutting with a hot cutter and discharging into pellets by using a hot cutter, a pellet with cutting and discharging into a sheet with a sheet cutter And the like.
Alternatively, the melted product may be solidified and then cut with a cutter.

抗菌性樹脂成形品中の抗菌性グリッター混入量は、グリッターの種類や大きさ、形状によって変わるので特に制限はなく、それらに応じて適宜選択すればよい。
しかし、グリッターの混入量が少なすぎると所望の光輝性、抗菌性、及び電磁波遮蔽性が充分に得られないことがあり、一方グリッターの混入量が多すぎると、樹脂成形品の強度が充分に保たれない為に、グリッターの形状が変化したり、グリッターが均一に分散されなかったりするので、結果的に所望の光輝性、抗菌性、及び電磁波遮蔽性を有する樹脂成形品を得られないという問題が生じる場合がある。
従って、上記の点を考慮すると抗菌性グリッターの混入量は、樹脂成形品中0.5〜80重量%が好ましく、より好ましくは1〜60重量%であれば万全である。
The amount of antibacterial glitter mixed in the antibacterial resin molded product is not particularly limited because it varies depending on the type, size and shape of the glitter, and may be appropriately selected according to them.
However, if the amount of glitter is too small, the desired glitter, antibacterial properties, and electromagnetic wave shielding properties may not be obtained sufficiently. On the other hand, if the amount of glitter is too large, the strength of the resin molded product is sufficient. Since it is not maintained, the shape of the glitter changes or the glitter is not uniformly dispersed. As a result, a resin molded product having desired glitter, antibacterial properties, and electromagnetic shielding properties cannot be obtained. Problems may arise.
Therefore, in consideration of the above points, the mixing amount of the antibacterial glitter is preferably 0.5 to 80% by weight in the resin molded product, and more preferably 1 to 60% by weight.

[実施例1]
耐熱性樹脂層として厚さ9μmの透明なポリエチレンテレフタレートフイルムを使用し、該フイルムの片面に、真空蒸着法による厚さ45nmの銀薄膜層、ポリエステル樹脂90重量%とメラミン樹脂10重量%からなる厚さ0.6μmのトップコート層(耐熱性樹脂層)を順次形成した積層体を得た。
次に上記積層体を幅約0.15mmの糸状にスリットし、さらにこの糸状にスリットしたものを長さ約0.15mmにカットして、本発明の抗菌性グリッターを得た。
[Example 1]
A transparent polyethylene terephthalate film having a thickness of 9 μm is used as the heat-resistant resin layer, and a 45 nm-thick silver thin film layer formed by vacuum deposition, a thickness of 90% by weight of polyester resin and 10% by weight of melamine resin is used on one side of the film. A laminate in which a 0.6 μm thick top coat layer (heat-resistant resin layer) was sequentially formed was obtained.
Next, the laminate was slit into a thread having a width of about 0.15 mm, and the slit was further cut into a length of about 0.15 mm to obtain the antibacterial glitter of the present invention.

[実施例2]
耐熱性樹脂層として厚さ9μmの透明なポリエチレンテレフタレートフイルムを使用し、該フイルムの片面に、ポリエステル樹脂90重量%とメラミン樹脂10重量%からなる厚さ0.8μmのアンカーコート層、真空蒸着法による厚さ60nmの銀薄膜層、ポリエステル樹脂90重量%とメラミン樹脂10重量%である樹脂に酸化チタン粉末を混入した厚さ1.0μmの白色トップコート層を順次形成したものを2枚準備し、該2枚をいずれもトップコート層を内側として厚さ1.5μmのポリエステル樹脂接着層で貼り合せて積層体を得た。
次に上記積層体を幅約0.2mmの糸状にスリットし、さらにこの糸状にスリットしたものを長さ約0.3mmにカットして、本発明の抗菌性グリッターを得た。
[Example 2]
A transparent polyethylene terephthalate film having a thickness of 9 μm is used as the heat-resistant resin layer, and an anchor coat layer having a thickness of 0.8 μm comprising 90% by weight of a polyester resin and 10% by weight of a melamine resin is formed on one side of the film. Two sheets of a silver thin film layer having a thickness of 60 nm and a white topcoat layer having a thickness of 1.0 μm in which titanium oxide powder is mixed in a resin having 90% by weight of a polyester resin and 10% by weight of a melamine resin are prepared. The two sheets were bonded together with a 1.5 μm thick polyester resin adhesive layer with the top coat layer on the inside to obtain a laminate.
Next, the laminate was slit into a thread having a width of about 0.2 mm, and the slit was further cut into a length of about 0.3 mm to obtain the antibacterial glitter of the present invention.

[実施例3]
厚さ9μmの透明なポリエチレンテレフタレートフイルムを使用し、該フイルムの両面に、ポリエステル樹脂90重量%とメラミン樹脂10重量%からなる厚さ0.8μmのアンカーコート層、真空蒸着法による厚さ60nmの銀薄膜層、ポリエステル樹脂90重量%とメラミン樹脂10重量%からなる厚さ1μmのトップコート層(耐熱性樹脂層)をそれぞれ順次形成した積層体を得た。
次に上記積層体を幅約0.2mmの糸状にスリットし、さらにこの糸状にスリットしたものを長さ約0.3mmにカットして、本発明の抗菌性グリッターを得た。
[Example 3]
A transparent polyethylene terephthalate film having a thickness of 9 μm was used, and an anchor coating layer having a thickness of 0.8 μm consisting of 90% by weight of a polyester resin and 10% by weight of a melamine resin was formed on both sides of the film. A laminate in which a silver thin film layer, a topcoat layer (heat-resistant resin layer) having a thickness of 1 μm and comprising 90% by weight of a polyester resin and 10% by weight of a melamine resin was sequentially formed was obtained.
Next, the laminate was slit into a thread having a width of about 0.2 mm, and the slit was further cut into a length of about 0.3 mm to obtain the antibacterial glitter of the present invention.

[実施例4]
実施例1の抗菌性グリッターを、200℃以上に溶融したPP(ポリプロピレン)樹脂中に、PP樹脂99重量%に対して1重量%添加し、一軸押出機にて約30分間スクリュー圧をかけて、PP樹脂中に該グリッターを均一に分散させた後、樹脂を押出して本発明の抗菌性樹脂成形品である洗面器を10個製造した。
得られた洗面器は、何れも均一な光輝性のある外観を呈しており、ロット間のばらつきもなかった。
[Example 4]
1% by weight of the antibacterial glitter of Example 1 is added to 99% by weight of PP resin in PP (polypropylene) resin melted at 200 ° C. or more, and screw pressure is applied for about 30 minutes in a single screw extruder. After the glitter was uniformly dispersed in the PP resin, the resin was extruded to produce 10 basins which are antibacterial resin molded products of the present invention.
All of the obtained washbasins had a uniform glossy appearance, and there was no variation between lots.

[実施例5]
実施例1の抗菌性グリッターに替えて、実施例2の抗菌性グリッターを使用したこと以外は実施例4と同様にして、本発明の抗菌性樹脂成形品である洗面器を10個製造した。
得られた洗面器は、何れも均一な光輝性のある外観を呈しており、ロット間のばらつきもなかった。
[Example 5]
Ten washbasins, which are antibacterial resin molded products of the present invention, were produced in the same manner as in Example 4 except that the antibacterial glitter of Example 2 was used instead of the antibacterial glitter of Example 1.
All of the obtained washbasins had a uniform glossy appearance, and there was no variation between lots.

[実施例6]
実施例3の抗菌性グリッターを、200℃以上に溶融したPP樹脂中に、PP樹脂70重量%に対して30重量%添加し、一軸押出機にて約30分間スクリュー圧をかけて、PP樹脂中に該グリッターを均一に分散させた後、押出して排出しホットカッターでカットし、直径2mm、長さ5mmの抗菌性を有する樹脂成形品製造用光輝性樹脂ペレットを得た。
得られた該樹脂ペレットは、各々の樹脂ペレット中にグリッターが均一に分散され、ペレット全体が多数の細かい美麗な光輝性を呈しており、また強度も充分であった。
次に上記樹脂成形品製造用光輝性樹脂ペレット50部とグリッターを混入していないマスターペレット50部をホッパーに投入し、約20分間押出機で溶融、攪拌した後、樹脂を押出して本発明の抗菌性樹脂成形品である洗面器を10個製造した。
得られた洗面器は、何れも均一な光輝性のある外観を呈しており、ロット間のばらつきもなかった。
[Example 6]
The antibacterial glitter of Example 3 was added to PP resin melted at 200 ° C. or higher in an amount of 30% by weight with respect to 70% by weight of PP resin, and the screw pressure was applied for about 30 minutes with a single screw extruder to produce PP resin. After the glitter was uniformly dispersed therein, it was extruded, discharged and cut with a hot cutter to obtain a glittering resin pellet for producing a resin molded product having an antibacterial property of 2 mm in diameter and 5 mm in length.
In the obtained resin pellet, the glitter was uniformly dispersed in each resin pellet, the whole pellet exhibited many fine and beautiful glitters, and the strength was sufficient.
Next, 50 parts of the glittering resin pellets for producing the resin molded product and 50 parts of master pellets not mixed with glitter are put into a hopper, melted and stirred with an extruder for about 20 minutes, and then extruded to extrude the resin. Ten washbasins, which are antibacterial resin molded products, were produced.
All of the obtained washbasins had a uniform glossy appearance, and there was no variation between lots.

比較例Comparative example

[比較例1]
銀薄膜層の厚さを30nmとしたこと以外は実施例1と同様にしてグリッターを得た。
[Comparative Example 1]
A glitter was obtained in the same manner as in Example 1 except that the thickness of the silver thin film layer was 30 nm.

[比較例2]
実施例1の銀薄膜層に替えて、厚さ45nmのアルミニウム薄膜層を形成したこと以外は実施例1と同様にしてグリッターを得た。
[Comparative Example 2]
Instead of the silver thin film layer of Example 1, a glitter was obtained in the same manner as in Example 1 except that an aluminum thin film layer having a thickness of 45 nm was formed.

[比較例3]
実施例1の抗菌性グリッターに替えて、比較例1のグリッターを使用したこと以外は、実施例4と同様にして洗面器を10個製造した。
得られた洗面器は、何れも均一な光輝性のある外観を呈しており、ロット間のばらつきもなかった。
[Comparative Example 3]
Ten basins were produced in the same manner as in Example 4 except that the glitter of Comparative Example 1 was used instead of the antibacterial glitter of Example 1.
All of the obtained washbasins had a uniform glossy appearance, and there was no variation between lots.

[比較例4]
実施例1の抗菌性グリッターに替えて、比較例2のグリッターを使用したこと以外は、実施例4と同様にして洗面器を10個製造した。
得られた洗面器は、何れも均一な光輝性のある外観を呈しており、ロット間のばらつきもなかった。
[Comparative Example 4]
Ten washbasins were produced in the same manner as in Example 4 except that the glitter of Comparative Example 2 was used instead of the antibacterial glitter of Example 1.
All of the obtained washbasins had a uniform glossy appearance, and there was no variation between lots.

[比較例5]
グリッターを添加しなかったこと以外は実施例4と同様にして洗面器を1個製造した。
得られた洗面器は、当然のことながら光輝性を有していなかった。
[Comparative Example 5]
One basin was produced in the same manner as in Example 4 except that no glitter was added.
As a matter of course, the obtained wash basin did not have glitter.

実施例1〜3の本発明の抗菌性グリッター、比較例1、2のグリッター、実施例4〜6の本発明の抗菌性樹脂成形品である洗面器、及び比較例3〜5の洗面器について、以下の抗菌性試験を行ない性能を比較した。   Examples 1 to 3 of the antibacterial glitter of the present invention, Comparative examples 1 and 2, the washbasin which is the antibacterial resin molded product of the present invention of Examples 4 to 6 and Comparative Examples 3 to 5 The following antibacterial tests were conducted to compare the performance.

[抗菌性試験(グリッター)]
(評価試料)実施例1〜3の本発明の抗菌性グリッター、比較例1、2のグリッターをそれぞれ0.4グラム準備して試料とした。
(評価方法)SEK菌数測定法:試料をオートクレープで滅菌後、約10CFU/mlになる様に1/20ニュートリエント培地で調整した肺炎桿菌液0.2mlをそれぞれの試料に接種し、37℃で18時間後の生残菌数をそれぞれ測定した。
また、試料に接種しない肺炎桿菌液そのもの(ブランク)についても、37℃で18時間保存後の生残菌数を測定した。
(評価結果)合計厚さが120nm(60nm×2)の銀薄膜層が形成されている実施例2、3のグリッターは、生残菌数が培養前の菌数の1/1000程度に、厚さが45nmの銀薄膜層が形成されている実施例1のグリッターは、生残菌数が培養前の菌数の1/500程度にそれぞれ減少しており、優れた抗菌性を有していた。
これに対し、厚さが30nmの銀薄膜層が形成されている比較例1のグリッターは、生残菌数が培養前の菌数の1/5程度にしか減少せず抗菌性に劣っており、また、アルミニウム薄膜層が形成されている比較例2のグリッターについては、生残菌数がブランクと同様、培養前の菌数の千倍に増加し、抗菌性を全く有していなかった。
[Antimicrobial test (glitter)]
(Evaluation Sample) 0.4 g of the antibacterial glitter of the present invention of Examples 1 to 3 and the glitter of Comparative Examples 1 and 2 were prepared and used as samples.
(Evaluation method) SEK bacteria count method: Each sample is inoculated with 0.2 ml of Klebsiella pneumoniae adjusted with 1/20 Nutrient medium so that the sample is sterilized by autoclaving to about 10 5 CFU / ml. The number of surviving bacteria after 18 hours at 37 ° C. was measured.
In addition, the number of surviving bacteria after storage at 37 ° C. for 18 hours was also measured for the Klebsiella pneumoniae liquid itself (blank) that was not inoculated into the sample.
(Evaluation result) The glitters of Examples 2 and 3 in which a silver thin film layer having a total thickness of 120 nm (60 nm × 2) is formed has a survival cell count of about 1/1000 of the cell count before culture. The glitter of Example 1 in which a silver thin film layer having a thickness of 45 nm was formed had an excellent antibacterial property, with the number of surviving bacteria being reduced to about 1/500 of the number of bacteria before culturing, respectively. .
On the other hand, the glitter of Comparative Example 1 in which a silver thin film layer having a thickness of 30 nm is formed has a reduced number of surviving bacteria only about 1/5 of the number of bacteria before culturing, and is inferior in antibacterial properties. Moreover, about the glitter of the comparative example 2 in which the aluminum thin film layer was formed, the number of surviving bacteria increased 1000 times the number of bacteria before culture | cultivation similarly to the blank, and it did not have antimicrobial property at all.

[抗菌性試験(洗面器)]
(評価試料)実施例4〜6の本発明の抗菌性樹脂成形品である洗面器、及び比較例3〜5の洗面器をそれぞれ1個準備して試料とした。
(評価方法)SEK菌数測定法:試料をオートクレープで滅菌後、約10CFU/mlになる様に1/20ニュートリエント培地で調整した肺炎桿菌液0.2mlをそれぞれの試料に接種し、37℃で18時間、及び150時間保存後の生残菌数をそれぞれ測定した。
(評価結果)合計厚さが120nm(60nm×2)の銀薄膜層が形成されているグリッターが混入されている実施例5、6の本発明の抗菌性樹脂成形品である洗面器、及び厚さが45nmの銀薄膜層が形成されている実施例4の本発明の抗菌性樹脂成形品である洗面器は、18時間後に生残菌数が培養前の菌数の1/10程度に、150時間後には1/50程度にそれぞれ減少しており、優れた抗菌性を有していた。
これに対し、合計厚さが30nmの銀薄膜層が形成されているグリッターが混入されている比較例3の洗面器は、18時間後に生残菌数が培養前の菌数の2/3程度にしか減少せず、また150時間後の生残菌数も18時間後の生残菌数と同程度(培養前の菌数の2/3程度)であり変化なく、抗菌性が不充分であった。
さらに、アルミニウム薄膜層が形成されているグリッターが混入されている比較例4の洗面器については、グリッターが混入されていない比較例5の洗面器と同様、生残菌数が、18時間後に培養前の菌数の千倍、150時間には培養前の菌数の10万倍に増加し、抗菌性を全く有していなかった。
[Antimicrobial test (basin)]
(Evaluation Sample) One wash basin, which is the antibacterial resin molded product of Examples 4 to 6 of the present invention, and one wash basin of Comparative Examples 3 to 5 were prepared and used as samples.
(Evaluation method) SEK bacteria count method: Each sample is inoculated with 0.2 ml of Klebsiella pneumoniae adjusted with 1/20 Nutrient medium so that the sample is sterilized by autoclaving to about 10 5 CFU / ml. The number of surviving bacteria after storage at 37 ° C. for 18 hours and 150 hours was measured.
(Evaluation result) Washbasin which is an antibacterial resin molded product of the present invention of Examples 5 and 6 in which a glitter in which a silver thin film layer having a total thickness of 120 nm (60 nm × 2) is formed is mixed, and a thickness The washbasin which is an antibacterial resin molded product of the present invention of Example 4 in which a silver thin film layer having a thickness of 45 nm is formed has a survival cell count of about 1/10 of the cell count before culture after 18 hours. After 150 hours, it decreased to about 1/50, and had excellent antibacterial properties.
On the other hand, in the basin of Comparative Example 3 in which the glitter in which the silver thin film layer having a total thickness of 30 nm is formed is mixed, the survival cell count after about 18 hours is about 2/3 of the cell count before culture. In addition, the number of surviving bacteria after 150 hours is about the same as the number of surviving bacteria after 18 hours (about 2/3 of the number before surviving) and there is no change, and the antibacterial property is insufficient. there were.
Furthermore, as for the basin of Comparative Example 4 in which the glitter in which the aluminum thin film layer is formed is mixed, as in the basin of Comparative Example 5 in which no glitter is mixed, the number of surviving bacteria is cultured after 18 hours. Thousands of the previous number of bacteria increased to 100,000 times the number before the culturing for 150 hours, and had no antibacterial properties.

Claims (2)

両外側に耐熱性樹脂層が形成され、かつ少なくとも内側に銀又は銅薄膜層が1層以上形成された積層体の砕片であるグリッターにおいて、銀又は銅薄膜層の合計厚さが40〜5000nmであること、及び耐熱性樹脂層の厚さが0.4〜100μmであることを特徴とする抗菌性グリッター。   In a glitter which is a fragment of a laminate in which a heat resistant resin layer is formed on both outer sides and at least one silver or copper thin film layer is formed on the inner side, the total thickness of the silver or copper thin film layer is 40 to 5000 nm. And an antibacterial glitter characterized in that the heat-resistant resin layer has a thickness of 0.4 to 100 μm. 樹脂に請求項1記載の抗菌性グリッターが混入されていることを特徴とする抗菌性樹脂成形品。   An antibacterial resin molded product, wherein the antibacterial glitter according to claim 1 is mixed in a resin.
JP2004137124A 2004-05-06 2004-05-06 Antibacterial molded resin article and antibacterial glitter to be used therein Pending JP2005320256A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011032313A (en) * 2009-07-30 2011-02-17 Reiko Co Ltd Heat-resistant glitter and bright resin pellet obtained by use of the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011032313A (en) * 2009-07-30 2011-02-17 Reiko Co Ltd Heat-resistant glitter and bright resin pellet obtained by use of the same

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