JPH07290660A - Article having water repellent coating layer and method for producing the same - Google Patents
Article having water repellent coating layer and method for producing the sameInfo
- Publication number
- JPH07290660A JPH07290660A JP6091288A JP9128894A JPH07290660A JP H07290660 A JPH07290660 A JP H07290660A JP 6091288 A JP6091288 A JP 6091288A JP 9128894 A JP9128894 A JP 9128894A JP H07290660 A JPH07290660 A JP H07290660A
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- powder
- molecular weight
- coating layer
- fluororesin
- heat
- Prior art date
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Abstract
(57)【要約】
【目的】 基材の所定表面に撥水性に優れた被覆層を形
成した物品およびその物品を容易に製造する方法を提供
する。
【構成】 基材の所定表面に、熱流動性フッ素樹脂被膜
と、この被膜中に分散され且つその一部が該被膜から露
出している低分子量ポリテトラフルオロエチレン粉末か
ら成る被覆層を形成した物品であり、その製造に際して
は、基材の所定表面に、熱流動性フッ素樹脂粉末と低分
子量ポリテトラフルオロエチレン粉末を含む分散液を塗
布し、次いで、熱流動性フッ素樹脂の融点以上で且つ低
分子量ポリテトラフルオロエチレンの融点よりも低い温
度で加熱することにより被覆層を形成する。
(57) [Summary] [PROBLEMS] To provide an article in which a coating layer having excellent water repellency is formed on a predetermined surface of a substrate, and a method for easily producing the article. [Structure] A heat-flowable fluororesin coating film and a coating layer made of low-molecular weight polytetrafluoroethylene powder dispersed in the coating film and partially exposed from the coating film are formed on a predetermined surface of a substrate. An article, and in the production thereof, a predetermined surface of a base material is coated with a dispersion liquid containing a heat-fluidizable fluororesin powder and a low-molecular weight polytetrafluoroethylene powder, and then the melting point of the heat-fluidizable fluororesin or higher and The coating layer is formed by heating at a temperature lower than the melting point of low molecular weight polytetrafluoroethylene.
Description
【０００１】[0001]
【産業上の利用分野】本発明は撥水性に優れる被覆層を
有する物品およびその製造法に関するものである。TECHNICAL FIELD The present invention relates to an article having a coating layer having excellent water repellency and a method for producing the article.
【０００２】[0002]
【従来の技術】近年、野球場、体育館等のような建築物
の屋根を空気膜構造やテンション構造とする例が増加し
つつあり、この屋根の材料として、例えば、ガラスクロ
スの表面にシリコーン樹脂層、ポリテトラフルオロエチ
レン（以下、「ＰＴＦＥ」という）層、ガラスビーズ含
有ＰＴＦＥ層、およびテトラフルオロエチレン−ヘキサ
フルオロプロピレン共重合体（以下「ＦＥＰ」という）
層を順次設けた膜材（特公昭５５−７１４８号公報）が
提案されている。2. Description of the Related Art In recent years, the number of roofs of buildings such as baseball fields and gymnasiums having an air film structure or a tension structure is increasing. As a material for this roof, for example, a silicone resin is used on the surface of glass cloth. Layer, polytetrafluoroethylene (hereinafter referred to as "PTFE") layer, glass bead-containing PTFE layer, and tetrafluoroethylene-hexafluoropropylene copolymer (hereinafter referred to as "FEP")
A membrane material in which layers are sequentially provided (Japanese Patent Publication No. 55-7148) is proposed.
【０００３】この膜材で構成した屋根は光透過性を有す
るので昼間の人工照明は殆ど不要であるという利点があ
る。そして、この屋根は最外層がＦＥＰ層であり、撥水
性を有し、該層の水に対する接触角は約１１４°であ
る。Since the roof made of this film material has a light transmitting property, there is an advantage that artificial lighting in the daytime is almost unnecessary. The outermost layer of this roof is the FEP layer, which has water repellency, and the contact angle of the layer with water is about 114 °.
【０００４】また、アラミド繊維から成るクロスやガラ
スクロスにＰＴＦＥ層を設けた高機能工業材料もあり、
これらにおけるＰＴＦＥ層の水に対する接触角は約１０
６〜１１４°である。There is also a high-performance industrial material in which a PTFE layer is provided on a cloth or glass cloth made of aramid fiber,
The contact angle of the PTFE layer with water in these is about 10
It is 6 to 114 °.
【０００５】[0005]
【発明が解決しようとする課題】上記従来の膜材による
屋根において、雨水は膜材の最外層を構成するＦＥＰ層
の撥水性によりはじかれ、膜材表面を均一に濡らすこと
はないもののその一部は水滴のまま残存してしまう。In the above-mentioned conventional roof made of a membrane material, rainwater is repelled by the water repellency of the FEP layer forming the outermost layer of the membrane material and does not uniformly wet the surface of the membrane material. The part remains as a water drop.
【０００６】従って、本発明は基材の所定表面に撥水性
のより優れた被覆層の形成された物品であって建築材
料、工業材料等に広く適用できる物品およびその製造法
を提供することをその目的とするものである。Accordingly, the present invention is to provide an article having a coating layer having more excellent water repellency formed on a predetermined surface of a substrate, which article can be widely applied to building materials, industrial materials and the like, and a method for producing the same. That is the purpose.
【０００７】[0007]
【課題を解決するための手段】本発明は基材の所定表面
に、熱流動性フッ素樹脂と低分子量ＰＴＦＥを含む被覆
層が形成されていることを特徴とする撥水性被覆層を有
する物品に関するものである。The present invention relates to an article having a water-repellent coating layer characterized in that a coating layer containing a heat-fluidizable fluororesin and low molecular weight PTFE is formed on a predetermined surface of a substrate. It is a thing.
【０００８】本発明に係る物品においては基材の所定表
面に熱流動性フッ素樹脂と低分子量ＰＴＦＥを含む被覆
層が形成される。ここで基材とはその所定表面に撥水性
被覆層を形成することが要求されるものであれば、その
材質、形状等は特に限定されない。例えば、金属、合成
樹脂、ガラス、セラミック、合成繊維等から成るフィル
ム、シート、板、成形体、織布、不織布等を用いること
ができる。また、この基材はその表面に予め塗装や、シ
リコーン樹脂、フッ素樹脂等のコーティングを施したも
のであってもよい。In the article according to the present invention, a coating layer containing a heat fluid fluororesin and low molecular weight PTFE is formed on a predetermined surface of a base material. Here, the material and shape of the base material are not particularly limited as long as it is required to form a water-repellent coating layer on the predetermined surface thereof. For example, a film, sheet, plate, molded body, woven fabric, non-woven fabric or the like made of metal, synthetic resin, glass, ceramic, synthetic fiber or the like can be used. Further, this base material may have a surface coated beforehand or coated with a silicone resin, a fluororesin or the like.
【０００９】本発明に用いる熱流動性フッ素樹脂とは、
その融点以上の温度で容易に流動するフッ素樹脂（従っ
て、ＰＴＦＥは除く）であり、ＦＥＰ、テトラフルオロ
エチレン−パーフルオロアルキルビニルエーテル共重合
体、エチレン−テトラフルオロエチレン共重合体、ポリ
クロロトリフルオロエチレン、クロロトリフルオロエチ
レン−エチレン共重合体等のうちから１種あるいは２種
以上を選択して用いる。The heat fluid fluororesin used in the present invention is
It is a fluororesin (thus excluding PTFE) that easily flows at a temperature above its melting point, and is FEP, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, ethylene-tetrafluoroethylene copolymer, polychlorotrifluoroethylene. , Or chlorotrifluoroethylene-ethylene copolymer and the like, and one or more kinds of them are selected and used.
【００１０】そして、本発明において重要なことは、こ
の熱流動性フッ素樹脂と、分子量が１０００〜１００
万、好ましくは１万〜５０万の低分子量ＰＴＦＥを併用
して基材の所定表面に被覆層を形成することである。こ
のように熱流動性フッ素樹脂と低分子量ＰＴＦＥを含む
被覆層を形成することにより、その理由は明らかではな
いが基材の所定表面の撥水性を極めて優れたものとする
ことができるのである。低分子量ＰＴＦＥの分子量が１
０００よりも小さいときは熱流動性フッ素樹脂と併用し
ての被覆層の形成が困難であり、一方、その分子量が１
００万を超えるときは形成される被覆層の撥水度合いが
期待するほどでないので好ましくない。What is important in the present invention is that this heat-fluidizable fluororesin has a molecular weight of 1,000 to 100.
10,000, preferably 10,000 to 500,000 low molecular weight PTFE is used together to form a coating layer on a predetermined surface of a substrate. By forming the coating layer containing the heat-fluidizable fluororesin and the low molecular weight PTFE in this manner, the water repellency of the predetermined surface of the base material can be made extremely excellent although the reason is not clear. Low molecular weight PTFE has a molecular weight of 1
When it is less than 000, it is difficult to form a coating layer in combination with a heat-fluidizable fluororesin, while the molecular weight is 1
When it exceeds, 000,000, the degree of water repellency of the coating layer formed is not as expected, which is not preferable.
【００１１】次に、本発明に係る撥水性被覆層を有する
物品の製造法について説明する。この方法も本発明者が
開発した新規なもので、基材の所定表面に、熱流動性フ
ッ素樹脂粉末と低分子量ＰＴＦＥ粉末を含む分散液を塗
布し、次いで熱流動性フッ素樹脂の融点以上で且つ低分
子量ＰＴＦＥ粉末の融点よりも低い温度で加熱すること
により、基材表面に熱流動性フッ素樹脂被膜と、この被
膜中に分散され且つその一部が該被膜から露出している
低分子量ＰＴＦＥ粉末から成る被覆層を形成することを
特徴とするものである。Next, a method for producing an article having a water repellent coating layer according to the present invention will be described. This method is also a novel one developed by the present inventor, in which a predetermined surface of a substrate is coated with a dispersion liquid containing a heat-fluidizable fluororesin powder and a low-molecular weight PTFE powder, and then at a temperature not lower than the melting point of the heat-fluidable fluororesin. Further, by heating at a temperature lower than the melting point of the low molecular weight PTFE powder, a heat-fluidic fluororesin coating film is formed on the surface of the base material, and a low molecular weight PTFE dispersed in the coating film and part of which is exposed from the coating film. It is characterized in that a coating layer made of powder is formed.
【００１２】この方法においては、先ず、基材の所定表
面に熱流動性フッ素樹脂粉末と低分子量ＰＴＦＥ粉末を
含む分散液（ディスパージョン）が塗布される。基材表
面への分散液の塗布は浸漬法、コーティング法、スプレ
ー法、刷毛塗り法等を採用できる。この分散液の分散媒
としては、通常、水を用いるが所望により有機溶媒を用
いることができ、水と有機溶媒を混合して用いることも
できる。なお、分散液としては、熱流動性フッ素樹脂粉
末の重量と低分子量ＰＴＦＥ粉末の重量の合計中に占め
る熱流動性フッ素樹脂粉末の割合が１０〜９０重量％、
低分子量ＰＴＦＥ粉末の割合が９０〜１０重量％になる
ように配合したものを用いる。そして、塗布作業性を考
慮して、分散液中におけるこれら両粉末重量合計の濃度
を１０〜６０重量％とするのが好ましい。また、熱流動
性フッ素樹脂粉末や低分子量ＰＴＦＥ粉末の分散性を向
上させるため、分散液に界面活性剤を適量添加すること
もできる。In this method, first, a dispersion (dispersion) containing a heat-fluidizable fluororesin powder and a low molecular weight PTFE powder is applied to a predetermined surface of a base material. The dispersion liquid may be applied to the surface of the substrate by a dipping method, a coating method, a spray method, a brush coating method, or the like. Water is usually used as the dispersion medium of this dispersion, but an organic solvent can be used if desired, and water and an organic solvent can also be mixed and used. As the dispersion, the proportion of the heat-fluidic fluororesin powder in the total weight of the heat-fluidic fluororesin powder and the weight of the low molecular weight PTFE powder is 10 to 90% by weight,
A low-molecular-weight PTFE powder is used so that the proportion thereof is 90 to 10% by weight. Then, considering the coating workability, it is preferable that the total concentration of both powders in the dispersion is 10 to 60% by weight. Moreover, in order to improve the dispersibility of the heat-fluidizable fluororesin powder and the low-molecular weight PTFE powder, a suitable amount of a surfactant can be added to the dispersion liquid.
【００１３】このようにして基材表面に熱流動性フッ素
樹脂粉末と低分子量ＰＴＦＥ粉末を含む分散液を塗布し
た後、熱流動性フッ素樹脂粉末の融点以上で且つ低分子
量ＰＴＦＥ粉末の融点よりも低い温度に加熱することに
より、熱流動性フッ素樹脂および低分子量ＰＴＦＥから
成る被覆層を形成する。本発明に用いる低分子量ＰＴＦ
Ｅは上記したようにその分子量が１０００〜１００万で
あり、かようなＰＴＦＥの融点は３１８〜３２５℃であ
ることが判明している。従って、被覆層形成時の加熱温
度はこれよりも低く設定する。なお、加熱時間は加熱温
度等に応じて決定するが、通常、５〜１０分である。熱
流動性フッ素樹脂粉末と低分子量ＰＴＦＥ粉末を上記割
合になるように混合した分散液を用い、この範囲の温度
で加熱することにより、熱流動性フッ素樹脂粉末は溶融
して基材表面に被膜を形成し、一方、低分子量ＰＴＦＥ
は溶融せずに熱流動性フッ素樹脂被膜中に分散され且つ
その一部が被膜から露出するようになる。このように熱
流動性フッ素樹脂被膜と、この被膜中に分散され且つそ
の一部が該被膜から露出している低分子量ＰＴＦＥ粉末
から成る被覆層はその撥水性が極めて優れており、水に
対する接触角が約１２５°よりも大きな値を示すように
なる。After the dispersion liquid containing the heat-fluidizable fluororesin powder and the low molecular weight PTFE powder is applied to the surface of the base material in this way, it is higher than the melting point of the heat-fluidic fluororesin powder and higher than the melting point of the low-molecular weight PTFE powder. By heating to a low temperature, a coating layer made of a heat-fluidizable fluororesin and low-molecular weight PTFE is formed. Low molecular weight PTF used in the present invention
It has been found that E has a molecular weight of 1,000 to 1,000,000 as described above, and the melting point of such PTFE is 318 to 325 ° C. Therefore, the heating temperature when forming the coating layer is set lower than this. The heating time is determined depending on the heating temperature and the like, but is usually 5 to 10 minutes. By using a dispersion liquid in which the heat-fluidic fluororesin powder and the low-molecular weight PTFE powder are mixed in the above proportions and heating at a temperature in this range, the heat-fluidic fluororesin powder is melted to form a film on the substrate surface. Forming low molecular weight PTFE
Is not melted but dispersed in the heat-fluidizable fluororesin coating and a part of it is exposed from the coating. As described above, the heat-fluidic fluororesin coating and the coating layer composed of the low-molecular weight PTFE powder dispersed in the coating and part of which is exposed from the coating have extremely excellent water repellency, and contact with water. The angle becomes larger than about 125 °.
【００１４】図１は本発明に係る撥水性被覆層を有する
物品の例を示している。この物品を製造するには、先
ず、ガラスクロス１をＰＴＦＥ粉末の水性ディスパージ
ョン中に含浸して引上げ、これをＰＴＦＥの融点以上の
温度に加熱することにより、焼成されたＰＴＦＥ層２を
設けて基材を得る。そして、この基材の片面に熱流動性
フッ素樹脂粉末と低分子量ＰＴＦＥ粉末を含む水性ディ
スパージョンを塗布し、次いで、熱流動性フッ素樹脂粉
末の融点以上で且つ低分子量ＰＴＦＥ粉末の融点よりも
低い温度で加熱することにより、ＰＴＦＥ層２上に熱流
動性フッ素樹脂被膜３と、該被膜３中に分散され且つそ
の一部が該被膜から露出するように配置された低分子量
ＰＴＦＥ粉末４から成る被覆層を形成する。FIG. 1 shows an example of an article having a water repellent coating layer according to the present invention. In order to manufacture this article, first, glass cloth 1 is impregnated into an aqueous dispersion of PTFE powder and pulled up, and this is heated to a temperature equal to or higher than the melting point of PTFE to provide a fired PTFE layer 2. Obtain a substrate. Then, an aqueous dispersion containing the heat-fluidizable fluororesin powder and the low-molecular weight PTFE powder is applied to one surface of this base material, and then is higher than the melting point of the heat-fluidic fluororesin powder and lower than the melting point of the low-molecular-weight PTFE powder. By heating at a temperature, a heat-fluidizable fluororesin coating 3 is formed on the PTFE layer 2, and a low molecular weight PTFE powder 4 dispersed in the coating 3 and partly exposed from the coating. Form a coating layer.
【００１５】[0015]
【実施例】以下、実施例により本発明を更に詳細に説明
する。EXAMPLES The present invention will be described in more detail below with reference to examples.
【００１６】実施例１ 厚さ５００μｍのガラスクロスを分子量２７０万のＰＴ
ＦＥ粉末をその濃度が６０重量％になるように水に分散
させたディスパージョン中に浸漬して引上げ、３６０℃
で３分間加熱して焼成する。この浸漬および加熱をもう
一度繰り返し、ガラスクロスの表面にＰＴＦＥ層（付着
量７２９ｇ／ｍ2 ）を形成する。Example 1 Glass cloth having a thickness of 500 μm was treated with PT having a molecular weight of 2.7 million.
The FE powder was immersed in a dispersion dispersed in water so that the concentration of the FE powder would be 60% by weight and pulled up to 360 ° C.
Bake by heating for 3 minutes. This immersion and heating are repeated once more to form a PTFE layer (adhesion amount: 729 g / m 2 ) on the surface of the glass cloth.
【００１７】次に、これをＦＥＰ粉末（融点２７０℃）
をその濃度が６０重量％になるように水に分散させたデ
ィスパージョン中に浸漬して引上げ、３６０℃で３分間
加熱する。この浸漬および加熱をもう一度繰り返し、Ｐ
ＴＦＥ層上にＦＥＰ層（付着量４４ｇ／ｍ2 ）が形成さ
れた基材を得る。Next, this was FEP powder (melting point 270 ° C.)
Is immersed in a dispersion dispersed in water so as to have a concentration of 60% by weight, pulled up, and heated at 360 ° C. for 3 minutes. Repeat this soaking and heating once more, P
A substrate in which an FEP layer (amount of adhesion: 44 g / m 2 ) is formed on the TFE layer is obtained.
【００１８】一方、これとは別に、上記と同じＦＥＰ粉
末の水性ディスパージョンと、分子量５０万、融点３２
４℃の低分子量ＰＴＦＥ粉末をその濃度が１０重量％に
なるように水に分散させたディスパージョンを用意し、
ＦＥＰ粉末の重量と低分子量ＰＴＦＥ粉末の重量の合計
中に占めるＦＥＰ粉末の割合が１０重量％、低分子量Ｐ
ＴＦＥ粉末の割合が９０重量％になるように両ディスパ
ージョンを混合し、次いで、全固形分濃度が２０重量％
になるように水を添加する。On the other hand, separately from this, the same aqueous dispersion of FEP powder as above, a molecular weight of 500,000 and a melting point of 32
Prepare a dispersion in which low-molecular-weight PTFE powder at 4 ° C. is dispersed in water so that the concentration becomes 10% by weight,
The ratio of the FEP powder to the total weight of the FEP powder and the low molecular weight PTFE powder is 10% by weight, and the low molecular weight P is
Both dispersions were mixed so that the proportion of TFE powder was 90% by weight, and then the total solid content concentration was 20% by weight.
Add water so that.
【００１９】そして、上記基材の片面にこの混合ディス
パージョンをバーコーター法により塗布し、温度３００
℃で５分間加熱することにより被覆層（付着量２０ｇ／
ｍ2）を形成した物品（試料１）を得た。Then, this mixed dispersion is applied to one surface of the base material by a bar coater method, and the temperature is set to 300.
The coating layer (adhesion amount 20 g /
m 2) was obtained a formed article (Sample 1).
【００２０】更に、混合ディスパージョン塗布後の加熱
を３２０℃で５分間行うこと以外は試料１と同様にして
物品（試料２）を得た。Further, an article (Sample 2) was obtained in the same manner as Sample 1 except that heating after coating the mixed dispersion was carried out at 320 ° C. for 5 minutes.
【００２１】これら両物品を走査型電子顕微鏡により倍
率５００倍で観察したところ、いずれも図１に示したの
と同様に、ＦＥＰ被膜と、該被膜中に分散され且つその
一部が該被膜から露出している低分子量ＰＴＦＥ分粉末
が確認された。また、これら両物品の被覆層に一定量の
水をたらし接触角を測定（雰囲気温度２５℃）したとこ
ろ、試料１は１４０°、試料２は１４３°であった。When these two articles were observed with a scanning electron microscope at a magnification of 500 times, both were found to have an FEP coating and a part of the FEP coating dispersed in the coating, as shown in FIG. An exposed low molecular weight PTFE content powder was confirmed. Further, when a certain amount of water was dropped on the coating layers of both of these articles and the contact angle was measured (atmosphere temperature 25 ° C.), Sample 1 was 140 ° and Sample 2 was 143 °.
【００２２】実施例２ ＦＥＰ粉末の水性ディスパージョンと低分子量ＰＴＦＥ
粉末の水性ディスパージョンを、ＦＥＰ粉末の重量と低
分子量ＰＴＦＥ粉末の重量の合計中に占めるＦＥＰ粉末
の割合が３０重量％、低分子量ＰＴＦＥ粉末の割合が７
０重量％になるように両ディスパージョンを混合して用
いること以外は実施例１と同様に作業して２種の物品
（試料３および４）を得た。試料３は被覆層形成時の加
熱条件を３００℃×５分としたもの、試料４はその条件
を３２０℃×５分としたものである。Example 2 Aqueous dispersion of FEP powder and low molecular weight PTFE
The proportion of the FEP powder in the total weight of the FEP powder and the weight of the low molecular weight PTFE powder in the aqueous dispersion of the powder is 30% by weight, and the proportion of the low molecular weight PTFE powder is 7%.
Two kinds of articles (Samples 3 and 4) were obtained in the same manner as in Example 1 except that both dispersions were mixed and used so as to be 0% by weight. Sample 3 has a heating condition of 300 ° C. × 5 minutes when forming the coating layer, and sample 4 has a heating condition of 320 ° C. × 5 minutes.
【００２３】これら両物品を実施例１と同様にして観察
したところ、ＦＥＰ被膜と、該被膜中に分散され且つそ
の一部が該被膜から露出している低分子量ＰＴＦＥ粉末
が確認された。また、被覆層の水に対する接触角は試料
３が１３６°、試料４が１３９°であった。When these two articles were observed in the same manner as in Example 1, an FEP coating and a low molecular weight PTFE powder dispersed in the coating and part of which was exposed from the coating were confirmed. The contact angle of the coating layer with water was 136 ° for Sample 3 and 139 ° for Sample 4.
【００２４】実施例３ ＦＥＰ粉末の水性ディスパージョンと低分子量ＰＴＦＥ
粉末の水性ディスパージョンを、ＦＥＰ粉末の重量と低
分子量ＰＴＦＥ粉末の重量の合計中に占めるＦＥＰ粉末
の割合が５０重量％、低分子量ＰＴＦＥ粉末の割合が５
０重量％になるように両ディスパージョンを混合して用
いること以外は実施例１と同様に作業して２種の物品
（試料５および６）を得た。試料５は被覆層形成時の加
熱条件を３００℃×５分としたもの、試料６はその条件
を３２０℃×５分としたものである。Example 3 Aqueous dispersion of FEP powder and low molecular weight PTFE
The proportion of the FEP powder in the total weight of the FEP powder and the weight of the low molecular weight PTFE powder in the aqueous dispersion of the powder is 50% by weight, and the proportion of the low molecular weight PTFE powder is 5%.
Two kinds of articles (Samples 5 and 6) were obtained in the same manner as in Example 1 except that both dispersions were mixed and used so as to be 0% by weight. Sample 5 has a heating condition of 300 ° C. × 5 minutes when forming the coating layer, and sample 6 has a heating condition of 320 ° C. × 5 minutes.
【００２５】これら両物品を実施例１と同様にして観察
したところ、ＦＥＰ被膜と、該被膜中に分散され且つそ
の一部が該被膜から露出している低分子量ＰＴＦＥ粉末
が確認された。また、被覆層の水に対する接触角は試料
５が１３０°、試料６が１３１°であった。When these two articles were observed in the same manner as in Example 1, an FEP coating and a low molecular weight PTFE powder dispersed in the coating and part of which was exposed from the coating were confirmed. The contact angles of the coating layer with water were 130 ° for Sample 5 and 131 ° for Sample 6.
【００２６】実施例４ ＦＥＰ粉末の水性ディスパージョンと低分子量ＰＴＦＥ
粉末の水性ディスパージョンを、ＦＥＰ粉末の重量と低
分子量ＰＴＦＥ粉末の重量の合計中に占めるＦＥＰ粉末
の割合が８５重量％、低分子量ＰＴＦＥ粉末の割合が１
５重量％になるように両ディスパージョンを混合して用
いること以外は実施例１と同様に作業して２種の物品
（試料７および８）を得た。試料７は被覆層形成時の加
熱条件を３００℃×５分としたもの、試料８はその条件
を３２０℃×５分としたものである。Example 4 Aqueous dispersion of FEP powder and low molecular weight PTFE
The proportion of the FEP powder in the total weight of the FEP powder and the low-molecular-weight PTFE powder in the aqueous dispersion of the powder is 85% by weight, and the proportion of the low-molecular-weight PTFE powder is 1%.
Two kinds of articles (Samples 7 and 8) were obtained in the same manner as in Example 1 except that both dispersions were mixed and used so as to be 5% by weight. Sample 7 has a heating condition of 300 ° C. × 5 minutes when forming the coating layer, and sample 8 has a heating condition of 320 ° C. × 5 minutes.
【００２７】これら両物品を実施例１と同様にして観察
したところ、ＦＥＰ被膜と、該被膜中に分散され且つそ
の一部が該被膜から露出している低分子量ＰＴＦＥ粉末
が確認された。また、被覆層の水に対する接触角は試料
７が１３６°、試料８が１４０°であった。When these two articles were observed in the same manner as in Example 1, an FEP coating and a low molecular weight PTFE powder dispersed in the coating and a part of which was exposed from the coating were confirmed. The contact angle of the coating layer with water was 136 ° for Sample 7 and 140 ° for Sample 8.
【００２８】実施例５ 分子量５０万の低分子量ＰＴＦＥ粉末に代え、分子量１
万、融点３２４℃の低分子量ＰＴＦＥ粉末を用いること
以外は実施例１と同様に作業して２種の物品（試料９お
よび１０）を得た。試料９は被覆層形成時の加熱条件を
３００℃×５分としたもの、試料１０はその条件を３２
０℃×５分としたものである。Example 5 A low molecular weight PTFE powder having a molecular weight of 500,000 was used instead of the low molecular weight PTFE powder.
In the same manner as in Example 1, except that low-molecular-weight PTFE powder having a melting point of 324 ° C. was used, two kinds of articles (Samples 9 and 10) were obtained. Sample 9 had a heating condition of 300 ° C. × 5 minutes when the coating layer was formed, and sample 10 had a heating condition of 32 ° C.
It is 0 ° C. × 5 minutes.
【００２９】これら両物品を実施例１と同様にして観察
したところ、ＦＥＰ被膜と、該被膜中に分散され且つそ
の一部が該被膜から露出している低分子量ＰＴＦＥ粉末
が確認された。また、被覆層の水に対する接触角は試料
９が１３９°、試料１０が１４１°であった。When these both articles were observed in the same manner as in Example 1, an FEP coating and a low molecular weight PTFE powder dispersed in the coating and part of which was exposed from the coating were confirmed. The contact angles of the coating layer with water were 139 ° for Sample 9 and 141 ° for Sample 10.
【００３０】比較例１ 実施例１で用いた基材におけるＦＥＰ層の水に対する接
触角は１１４°であった。Comparative Example 1 The contact angle of water of the FEP layer in the substrate used in Example 1 was 114 °.
【００３１】比較例２ 低分子量ＰＴＦＥ粉末の水性ディスパージョンに代え、
融点３２７℃、分子量３００万のＰＴＦＥ粉末の水性デ
ィスパージョン（ＰＴＦＥ粉末濃度６０重量％）を用意
する。Comparative Example 2 Instead of the aqueous dispersion of low molecular weight PTFE powder,
An aqueous dispersion of PTFE powder having a melting point of 327 ° C. and a molecular weight of 3,000,000 (PTFE powder concentration 60% by weight) is prepared.
【００３２】そして、ＦＥＰ粉末の水性ディスパージョ
ン（実施例１で用いたものと同じもの）と上記ＰＴＦＥ
粉末の水性ディスパージョンを、ＦＥＰ粉末の重量とＰ
ＴＦＥ粉末の重量の合計中に占めるＦＥＰ粉末の割合が
１０重量％、ＰＴＦＥ粉末の割合が９０重量％になるよ
うに両ディスパージョンを混合し、全固形分濃度が２０
重量％になるように水を添加して用いること以外は試料
２の場合と同様に作業して被覆層の形成された物品を得
た。Then, an aqueous dispersion of FEP powder (the same as that used in Example 1) and the above PTFE were used.
Aqueous dispersion of powder, PEP weight and P
Both dispersions were mixed so that the proportion of the FEP powder in the total weight of the TFE powder was 10% by weight and the proportion of the PTFE powder was 90% by weight, and the total solid content concentration was 20%.
An article on which a coating layer was formed was obtained in the same manner as in Sample 2 except that water was added so that the weight% was used.
【００３３】この物品を実施例１と同様に観察したとこ
ろ、ＦＥＰ被膜と、該被膜中に分散され且つその一部が
該被膜から露出しているＰＴＦＥ粉末が確認された。し
かし、この物品の被覆層の水に対する接触角は１０５°
にすぎなかった。When this article was observed in the same manner as in Example 1, an FEP coating and a PTFE powder dispersed in the coating and partially exposed from the coating were confirmed. However, the contact angle of the coating layer of this article with water is 105 °.
It was nothing more than
【００３４】[0034]
【発明の効果】本発明は上記のように構成され、基材の
所定表面の被覆層を熱流動性フッ素樹脂と低分子量ＰＴ
ＦＥにより形成したので、撥水性が極めて優れており、
また、本発明に係る方法によれば、かような撥水性の極
めて優れた被覆層を有する物品を容易に製造できる。The present invention is constructed as described above, and the coating layer on the predetermined surface of the base material is made of a heat-fluidizable fluororesin and a low molecular weight PT.
Since it is made of FE, it has excellent water repellency,
Further, according to the method of the present invention, an article having such a coating layer having extremely excellent water repellency can be easily manufactured.
【図１】本発明に係る撥水性被覆層を有する物品の実例
を示す正面図である。FIG. 1 is a front view showing an example of an article having a water repellent coating layer according to the present invention.
１ ガラスクロス ２ ＰＴＦＥ層 ３ 熱流動性フッ素樹脂被膜 ４ 低分子量ＰＴＦＥ粉末 1 glass cloth 2 PTFE layer 3 heat-fluidizable fluororesin coating 4 low molecular weight PTFE powder
Claims (5)
と低分子量ポリテトラフルオロエチレンを含む被覆層が
形成されていることを特徴とする撥水性被覆層を有する
物品。1. An article having a water-repellent coating layer, characterized in that a coating layer containing a heat-fluidizable fluororesin and low molecular weight polytetrafluoroethylene is formed on a predetermined surface of a substrate.
この被膜中に分散され且つその一部が該被膜から露出し
ている低分子量ポリテトラフルオロエチレン粉末から成
る請求項１記載の撥水性被覆層を有する物品。2. The coating layer is a heat fluid fluororesin coating,
An article having a water repellent coating layer according to claim 1, which comprises low molecular weight polytetrafluoroethylene powder dispersed in the coating and a part of which is exposed from the coating.
脂の重量と低分子量ポリテトラフルオロエチレンの重量
の合計中に占める熱流動性フッ素樹脂の割合が１０〜９
０重量％、低分子量ポリテトラフルオロエチレンの割合
が９０〜１０重量％である請求項２記載の撥水性被覆層
を有する物品。3. The proportion of the heat fluid fluororesin in the total weight of the heat fluid fluororesin forming the coating layer and the weight of the low molecular weight polytetrafluoroethylene is 10 to 9.
The article having a water-repellent coating layer according to claim 2, wherein the content of 0% by weight and the low molecular weight polytetrafluoroethylene is 90 to 10% by weight.
粉末と低分子量ポリテトラフルオロエチレン粉末を含む
分散液を塗布し、次いで熱流動性フッ素樹脂粉末の融点
以上で且つ低分子量ポリテトラフルオロエチレン粉末の
融点よりも低い温度で加熱することにより、基材表面に
熱流動性フッ素樹脂被膜と、この被膜中に分散され且つ
その一部が該被膜から露出している低分子量ポリテトラ
フルオロエチレン粉末から成る被覆層を形成することを
特徴とする撥水性被覆層を有する物品の製造法。4. A predetermined surface of a base material is coated with a dispersion liquid containing a heat-fluidizable fluororesin powder and a low-molecular weight polytetrafluoroethylene powder, and then a polytetrafluoroethylene having a melting point higher than that of the heat-fluidable fluororesin powder and a low-molecular weight polytetrafluoroethylene powder. By heating at a temperature lower than the melting point of the fluoroethylene powder, a heat-fluidic fluororesin coating film is formed on the surface of the base material, and a low molecular weight polytetrafluoropolymer dispersed in the coating film and part of which is exposed from the coating film. A method for producing an article having a water-repellent coating layer, which comprises forming a coating layer made of ethylene powder.
量ポリテトラフルオロエチレン粉末の重量の合計中に占
める熱流動性フッ素樹脂粉末の割合が１０〜９０重量
％、低分子量ポリテトラフルオロエチレン粉末の割合が
９０〜１０重量％になるように配合した分散液を用いる
請求項４記載の撥水性被覆層を有する物品の製造法。5. The ratio of the heat-fluidic fluororesin powder to the total weight of the heat-fluidizable fluororesin powder and the low-molecular weight polytetrafluoroethylene powder is 10 to 90% by weight, and the low-molecular-weight polytetrafluoroethylene powder is low. The method for producing an article having a water-repellent coating layer according to claim 4, wherein the dispersion liquid is blended so that the proportion of 90 to 10% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6091288A JPH07290660A (en) | 1994-04-28 | 1994-04-28 | Article having water repellent coating layer and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6091288A JPH07290660A (en) | 1994-04-28 | 1994-04-28 | Article having water repellent coating layer and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07290660A true JPH07290660A (en) | 1995-11-07 |
Family
ID=14022287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6091288A Pending JPH07290660A (en) | 1994-04-28 | 1994-04-28 | Article having water repellent coating layer and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07290660A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150240065A1 (en) * | 2008-05-30 | 2015-08-27 | Whitford Corporation | Blended fluoropolymer compositions |
| CN105058894A (en) * | 2015-07-31 | 2015-11-18 | 江苏维凯科技股份有限公司 | Making method of heat-insulation anticorrosive polytetrafluoroethylene membrane |
| US20160247491A1 (en) * | 2007-12-21 | 2016-08-25 | Innovatech, Llc | Marked precoated strings and method of manufacturing same |
| WO2017057148A1 (en) * | 2015-10-02 | 2017-04-06 | 東洋紡株式会社 | Electret and electret filter |
-
1994
- 1994-04-28 JP JP6091288A patent/JPH07290660A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160247491A1 (en) * | 2007-12-21 | 2016-08-25 | Innovatech, Llc | Marked precoated strings and method of manufacturing same |
| US10573280B2 (en) * | 2007-12-21 | 2020-02-25 | Innovatech, Llc | Marked precoated strings and method of manufacturing same |
| US20150240065A1 (en) * | 2008-05-30 | 2015-08-27 | Whitford Corporation | Blended fluoropolymer compositions |
| US9790358B2 (en) * | 2008-05-30 | 2017-10-17 | Whitford Corporation | Blended fluoropolymer compositions |
| CN105058894A (en) * | 2015-07-31 | 2015-11-18 | 江苏维凯科技股份有限公司 | Making method of heat-insulation anticorrosive polytetrafluoroethylene membrane |
| WO2017057148A1 (en) * | 2015-10-02 | 2017-04-06 | 東洋紡株式会社 | Electret and electret filter |
| US10940415B2 (en) | 2015-10-02 | 2021-03-09 | Toyobo Co., Ltd. | Electret and electret filter |
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