JP2656807B2 - Method for producing nonwoven sheet with oil repellency - Google Patents
Method for producing nonwoven sheet with oil repellencyInfo
- Publication number
- JP2656807B2 JP2656807B2 JP63194627A JP19462788A JP2656807B2 JP 2656807 B2 JP2656807 B2 JP 2656807B2 JP 63194627 A JP63194627 A JP 63194627A JP 19462788 A JP19462788 A JP 19462788A JP 2656807 B2 JP2656807 B2 JP 2656807B2
- Authority
- JP
- Japan
- Prior art keywords
- oil repellent
- sheet
- nonwoven
- nonwoven sheet
- oil
- 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.)
- Expired - Lifetime
Links
Landscapes
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は撥油性を付与された不織シートの製造方法に
関する。更に詳しくは、比表面積が1m2/g以上、のポリ
オレフィンよりなる不織シートについて、通気性を損な
うことなく、撥油性を付与する製造方法に関する。The present invention relates to a method for producing a nonwoven sheet provided with oil repellency. More specifically, the present invention relates to a production method for imparting oil repellency to a nonwoven sheet made of a polyolefin having a specific surface area of 1 m 2 / g or more without impairing air permeability.
(従来技術) 従来、均一に不織シート撥油性を付与するには撥油剤
を多量に塗布または含浸させなければならない。そのた
め、不織シート全体面に撥油剤が覆われるため、多量の
撥油剤がいるばかりでなく、通気性が損なわれる。この
欠点は単糸の細い、密度の高い不織シートに顕著に現れ
る。(Prior art) Conventionally, in order to uniformly impart oil repellency to a nonwoven sheet, a large amount of an oil repellent must be applied or impregnated. Therefore, since the entire surface of the nonwoven sheet is covered with the oil repellent, not only a large amount of the oil repellent is present but also the air permeability is impaired. This drawback is pronounced in thin, dense nonwoven sheets of single yarn.
(発明が解決しようとする課題) ポリオレフィンよりなる不織シートに通気性を損なう
ことなく、撥油性を付与するため、少量の撥油剤を均一
に付着させる方法を提供するものである。(Problem to be Solved by the Invention) An object of the present invention is to provide a method for uniformly attaching a small amount of an oil repellent to impart non-woven sheet made of polyolefin with oil repellency without impairing air permeability.
(課題を解決するための手段) 本発明は比表面積が1m2/g以上であるポリオレフィン
よりなる不織シートに、予めコロナ放電処理を施して、
ぬれ張力を42dyn/cm以上にした後、撥油剤を付着させる
ことにより、撥油性を付与された不織シートの製造方法
である。(Means for Solving the Problems) In the present invention, a nonwoven sheet made of a polyolefin having a specific surface area of 1 m 2 / g or more is subjected to corona discharge treatment in advance,
This is a method for producing a nonwoven sheet provided with oil repellency by applying an oil repellent after setting the wetting tension to 42 dyn / cm or more.
本発明におけるポリオレフィンとしては、ポリエチレ
ン、ポリプロピレン、あるいはエチレンを主体とする共
重合体、プロピレンを主体とする共重合体があげられ
る。Examples of the polyolefin in the present invention include polyethylene, polypropylene, a copolymer mainly composed of ethylene, and a copolymer mainly composed of propylene.
本発明の不織シートの比表面積は1m2/g以上である。
本不織シートは比表面積が大きく、通常の不織シートと
あるいは、フィルムのような全体面が均一なものとは表
面のミクロ構造が異なるものである。The specific surface area of the nonwoven sheet of the present invention is 1 m 2 / g or more.
The present nonwoven sheet has a large specific surface area, and the microstructure of the surface is different from that of a normal nonwoven sheet or a film having a uniform overall surface such as a film.
本発明の不織シートは公知の方法で製造することが出
来る。例えば、特公昭62−172073号公報には高密度ポリ
エチレンの例、特公昭62−192598号公報にはポリプロピ
レンの例が開示されている。The nonwoven sheet of the present invention can be manufactured by a known method. For example, Japanese Patent Publication No. 62-172073 discloses an example of high-density polyethylene, and Japanese Patent Publication No. 62-192598 discloses an example of polypropylene.
その一例を示すとポリオレフィン系ポリマーを高温高
圧下で、トリクロロフルオロメタン、塩化メチレン、ト
リクロロトリフルオロエチン等のハロゲン化炭化水素、
シクロヘキサン等の炭化水素又はこれらの混合液に溶解
した後、急激な圧力損失を与えることにより、溶液に極
めて微細に相分離したかの如き構造を与える。As an example, a polyolefin-based polymer is subjected to high-temperature and high-pressure, trichlorofluoromethane, methylene chloride, halogenated hydrocarbons such as trichlorotrifluoroethyne,
After dissolving in a hydrocarbon such as cyclohexane or a mixture thereof, a sudden pressure loss is applied to give the solution a structure as if it were very finely phase-separated.
この液状物を紡糸ノズルより吐出させ、ポリマーに配
向を与えると共に三次元網状繊維を形状せしめる。いわ
ゆるフラシュ紡糸により得られる。これをコンベアベル
ト上に振り落とし、ウェブ状にした後常温ないし適当な
温度(ポリオレフィンポリマーの融点以下)に保ったロ
ール(平滑ロール、エンボスロールなど)あるいは、フ
ェルト、カレンダーにより部分圧着または全面圧着し、
シート状にする。このシートは極めて微細かつ複雑な断
面を持つ繊維からなる。The liquid is discharged from a spinning nozzle to give orientation to the polymer and to shape the three-dimensional network fiber. It is obtained by so-called flash spinning. This is shaken down on a conveyor belt, formed into a web, and then partially or entirely pressed with a roll (smooth roll, emboss roll, etc.) or a felt or calender maintained at room temperature or an appropriate temperature (lower than the melting point of the polyolefin polymer), or a felt or calender. ,
Make a sheet. This sheet consists of fibers with a very fine and complex cross section.
本不織シートは平滑な表面を有するものである。 The nonwoven sheet has a smooth surface.
本発明においてコロナ放電処理とは、針状あるいはナ
イフエッヂ電極と対極間とで放電を行わせ、その間に試
料を入れ処理する方法である。In the present invention, the corona discharge treatment is a method in which a discharge is caused between a needle-like or knife-edge electrode and a counter electrode, and a sample is put between the discharges.
コロナ放電処理することにより、ぬれ張力を大きくす
ることが出来る。ぬれ張力を42dyn/cm以上にすることに
より撥油剤を均一に塗布することが出来る。The corona discharge treatment can increase the wetting tension. By making the wetting tension 42 dyn / cm or more, the oil repellent can be applied uniformly.
フィルムのような平坦な面に対しては、接着性、ぬれ
性を付与する目的でコロナ放電処理は行われている。し
かし、本発明における不織シートのようなミクロにフィ
ブリル化した構造的には不均質な面においてもコロナ放
電処理をすることにより、撥油剤を均一に塗布すること
が出来たことは驚くべきことである。これはミクロ的に
は不均一と考えられても、マクロ的指数であるぬれ張力
を42dyn/cm以上にすることにより、少量の撥油剤でも均
一な撥油性付与を可能とした。A corona discharge treatment is performed on a flat surface such as a film in order to impart adhesiveness and wettability. However, it is surprising that the oil repellent could be uniformly applied by corona discharge treatment even on a microfibrillated structurally heterogeneous surface such as the nonwoven sheet of the present invention. It is. Even though this is considered to be non-uniform microscopically, it was possible to impart uniform oil repellency even with a small amount of oil repellent by setting the wetting tension, which is a macro index, to 42 dyn / cm or more.
尚、ぬれ張力とはシートに対する各種液体の接触角
(cosθ)と液体の表面張力の関係において、cosθ=1
に外挿した表面張力の値である。The wetting tension is defined as the relationship between the contact angle (cos θ) of various liquids on the sheet and the surface tension of the liquid, cos θ = 1.
Is the value of the surface tension extrapolated to
本発明の不織シートの空隙率は75%以下が好ましい。
空隙率が75%をこえると毛羽立ちやすく、また強度的に
も弱い。The porosity of the nonwoven sheet of the present invention is preferably 75% or less.
If the porosity exceeds 75%, it is easy to fluff and the strength is weak.
本発明における撥油剤としては、シリコーン系の化合
物、または、フルオロカーボン系の化合物がある。不織
ポリオレフィンシートの通気性を損なわず、かつ十分な
撥油効果を得るためには、フルオロカーボン系の撥油剤
がより適当である。Examples of the oil repellent in the present invention include a silicone compound or a fluorocarbon compound. In order to maintain a sufficient oil repellency without impairing the air permeability of the nonwoven polyolefin sheet, a fluorocarbon oil repellent is more suitable.
撥油剤は、水溶液に分散させ、エマルジョンとしたも
の、また、溶剤に溶かしたものを不織ポリオレフィンシ
ートに塗布する。塗布させる撥油剤の量は、例えばフル
オロカーボン系の撥油剤の場合、不織ポリオレフィンシ
ートに対し、0.1〜2.0g/m2が適当であるが0.1g/m2以下
では、撥油効果が十分でなく、2.0g/m2以上では不織ポ
リオレフィンシートの表面に撥油剤の皮膜ができ、通気
性が損なわれるので好ましくない。通気性が損なわれず
に撥油性を付与するには、撥油剤の付着量は、0.1〜1.0
g/m2であることが好ましい。The oil repellent is dispersed in an aqueous solution to form an emulsion, or a solution dissolved in a solvent is applied to a nonwoven polyolefin sheet. The amount of the oil repellent to be applied is, for example, in the case of a fluorocarbon-based oil repellent, 0.1 to 2.0 g / m 2 is appropriate for the nonwoven polyolefin sheet, but at 0.1 g / m 2 or less, the oil repellent effect is sufficient. If it is 2.0 g / m 2 or more, a film of an oil repellent is formed on the surface of the nonwoven polyolefin sheet, and air permeability is impaired. In order to impart oil repellency without impairing air permeability, the amount of the oil repellent to be applied is 0.1 to 1.0.
g / m 2 is preferred.
本発明において撥油剤を塗布させる方法としては、
撥油剤溶液に不織ポリオレフィンシートを浸漬する方
法、キスロールあるいは、グラビアロールにより撥油
剤溶液を不織ポリオレフィンシートに塗布させる方法、
スプレーにより撥油剤を溶液を不織ポリオレフィンシ
ートに塗布する方法等があるが、スプレー方式の場合、
撥油剤が不織シートの表面に液滴となって付着するた
め、スプレー処理後、該シートの撥油剤付着面をブレー
ド状のもの、棒状のもの、回転ロールなどで擦り、該シ
ート表面に、撥油剤の均一な被膜を形成させることが必
要である。また、撥油剤溶液にアルコール類、界面活性
剤などを添加すれば、なお一層均一に撥油剤が付着す
る。In the present invention, as a method of applying an oil repellent,
A method of immersing the nonwoven polyolefin sheet in the oil repellent solution, a method of applying the oil repellent solution to the nonwoven polyolefin sheet by kiss roll or gravure roll,
There is a method of applying an oil repellent to a nonwoven polyolefin sheet by spraying, but in the case of a spray method,
Since the oil repellent adheres as droplets to the surface of the nonwoven sheet, after the spraying treatment, the surface of the sheet to which the oil repellent is adhered is rubbed with a blade-shaped, rod-shaped, rotating roll, or the like, and is applied to the sheet surface. It is necessary to form a uniform film of the oil repellent. In addition, when alcohols, surfactants, and the like are added to the oil repellent solution, the oil repellent adheres more evenly.
実施例の測定は、次の方法に基づいて行った。 The measurement of the example was performed based on the following method.
(1) ぬれ張力:ぬれ指数標準液(和光純薬製)を用
いて、ぬれ張力を測定する。(1) Wetting tension: Wetting tension is measured using a wetting index standard solution (manufactured by Wako Pure Chemical Industries, Ltd.).
(2) 通気性:JIS−L1096通気性B法 (3) 撥油性:JIS−P8146耐油度試験法 (4) 比表面積:BET法(窒素吸着法)、カルロエルバ
社製ソープトマチック1800使用 実施例1〜3、比較例1〜3 ポリエチレンをフラシュ紡糸することにより比表面積
10m2/g、空隙率68%、秤量60g/m2の不織シートを得た。
これにコロナ処理を施し、ぬれ張力を50dyn/cmとした
後、該シートにフッソ系撥水撥油剤(商品名 アサヒガ
ードAG530)の5%水溶液をスプレー法により付着さ
せ、該付着面をバーで擦り、これを100℃で2分間熱風
乾燥機で乾燥した。その時の撥油剤付着量は、0.05、0.
5、3.0g/m2であった。(2) Air permeability: JIS-L1096 air permeability B method (3) Oil repellency: JIS-P8146 oil resistance test method (4) Specific surface area: BET method (nitrogen adsorption method), using Carlo Elva Soapmatic 1800 Examples 1-3, Comparative Examples 1-3 Specific surface area by flash spinning polyethylene
A non-woven sheet having a density of 10 m 2 / g, a porosity of 68% and a basis weight of 60 g / m 2 was obtained.
This was subjected to a corona treatment to a wet tension of 50 dyn / cm, and a 5% aqueous solution of a fluorine-based water / oil repellent (trade name: Asahigard AG530) was adhered to the sheet by a spray method. It was rubbed and dried with a hot air drier at 100 ° C. for 2 minutes. The amount of oil repellent applied at that time was 0.05, 0.
5, 3.0 g / m 2 .
比較例1として、実施例の不織シートをコロナ放電処
理も撥油剤付着も行わないもの、比較例2として、実施
例の不織シートをコロナ放電処理のみを施したもの、比
較例3として、コロナ放電処理を施さずに、撥油剤を付
着したもの、および比較例4として、ポリプロピレンス
パンボンド不織シート(比表面積0.3m2/g、空隙率64
%、)にコロナ放電処理後、撥油剤付着したものについ
て、通気性、撥油性を測定した。結果を表−1に示す。As Comparative Example 1, the nonwoven sheet of the example was not subjected to corona discharge treatment or oil repellent attachment, as Comparative Example 2, the nonwoven sheet of Example was subjected to corona discharge treatment only, and as Comparative Example 3, As a comparative example 4, a polypropylene spunbond non-woven sheet (specific surface area: 0.3 m 2 / g, porosity: 64)
%), The air permeability and the oil repellency were measured for those having an oil repellent attached after corona discharge treatment. The results are shown in Table 1.
実施例4〜5、比較例5〜7 実施例1と同じ不織シートを、コロナ放電処理を施
し、ぬれ張力を48dyn/cmとした。該シートにフッソ系撥
水撥油剤(商品名 スコッチガード)の5%水溶液をキ
スロールにて塗布し、ドラム乾燥機で乾燥した。撥油剤
の付着量は0.3、1.5g/m2であった。比較例5として、実
施例の不織シートをコロナ放電処理も撥油剤付着も行わ
ないもの、比較例6として、実施例の不織シートをコロ
ナ放電処理のみを施したもの、比較例7として、コロナ
放電処理を施さずに、撥油剤を付着したものについて、
通気性、撥油性を測定した。結果を表−2に示す。 Examples 4 to 5 and Comparative Examples 5 to 7 The same nonwoven sheet as in Example 1 was subjected to a corona discharge treatment to a wet tension of 48 dyn / cm. A 5% aqueous solution of a fluorine-based water / oil repellent (trade name: Scotchguard) was applied to the sheet with a kiss roll and dried with a drum dryer. The adhesion amount of the oil repellent was 0.3 and 1.5 g / m 2 . As Comparative Example 5, the nonwoven sheet of the example was not subjected to corona discharge treatment or oil repellent attachment, as Comparative Example 6, the nonwoven sheet of the example was subjected to corona discharge treatment only, and as Comparative Example 7, For those with an oil repellent attached without performing corona discharge treatment,
Air permeability and oil repellency were measured. Table 2 shows the results.
実施例6〜9、比較例8〜10 ポリエチレンをフラシュ紡糸することにより比表面積
12m2/g、空隙率65%、秤量60g/m2の不織シートを得た。
これにコロナ放電処理を施し、ぬれ張力を50dyn/cmとし
た。該シートにフッソ系撥水撥油剤(商品名 アサヒガ
ードAG710)5部、イソプロピルアルコール10部、水85
部の混合液に浸漬した後マングルで絞液後、100℃で2
分熱風乾燥機で乾燥した。撥油剤の付着量は0.05、0.
6、2.0、3.0g/m2であった。 Examples 6-9, Comparative Examples 8-10 Specific surface area by flash spinning polyethylene
A non-woven sheet having 12 m 2 / g, a porosity of 65%, and a weighing of 60 g / m 2 was obtained.
This was subjected to a corona discharge treatment, and the wet tension was set to 50 dyn / cm. The sheet contains 5 parts of a fluorinated water and oil repellent (trade name: Asahi Guard AG710), 10 parts of isopropyl alcohol, and 85 parts of water.
Immersed in the mixed solution of the part, squeezed with a mangle,
It was dried with a hot air dryer. The amount of oil repellent applied is 0.05, 0.
6, 2.0, and 3.0 g / m 2 .
比較例8として、実施例6の不織シートをコロナ放電
処理も撥油剤付着も行わないもの、比較例9として、コ
ロナ放電処理のみを施したもの、比較例10として、コロ
ナ放電処理を施さずに、撥油剤を付着したものについ
て、通気性、撥油性を測定した。結果を表−3に示す。As Comparative Example 8, the nonwoven sheet of Example 6 was subjected to neither corona discharge treatment nor oil repellent attachment, Comparative Example 9 was subjected to corona discharge treatment only, and Comparative Example 10 was not subjected to corona discharge treatment. The air permeability and oil repellency were measured for those having an oil repellent adhered thereto. The results are shown in Table-3.
(発明の効果) 不織ポリオレフィンシートに、予めコロナ放電処理を
施した後、撥油剤を塗布することによって、均一に少量
の撥油剤を付着することが可能となり、不織ポリオレフ
ィンシートの通気性を損なうことなく、十分な撥油性を
付与することが可能となった。 (Effect of the Invention) After applying a corona discharge treatment to a nonwoven polyolefin sheet in advance and then applying an oil repellent, a small amount of the oil repellent can be uniformly attached, and the air permeability of the nonwoven polyolefin sheet can be improved. Sufficient oil repellency can be imparted without any loss.
Claims (1)
ンよりなる不織シートに、予めコロナ放電処理を施し
て、ぬれ張力を42dyn/cm以上とした後、撥油剤を付着さ
せることにより、撥油性を付与された不織シートの製造
方法。1. A non-woven sheet made of a polyolefin having a specific surface area of 1 m 2 / g or more is subjected to corona discharge treatment in advance to have a wetting tension of 42 dyn / cm or more, and then an oil repellent is attached thereto. A method for producing a nonwoven sheet provided with oil repellency.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63194627A JP2656807B2 (en) | 1988-08-05 | 1988-08-05 | Method for producing nonwoven sheet with oil repellency |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63194627A JP2656807B2 (en) | 1988-08-05 | 1988-08-05 | Method for producing nonwoven sheet with oil repellency |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0284544A JPH0284544A (en) | 1990-03-26 |
JP2656807B2 true JP2656807B2 (en) | 1997-09-24 |
Family
ID=16327660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63194627A Expired - Lifetime JP2656807B2 (en) | 1988-08-05 | 1988-08-05 | Method for producing nonwoven sheet with oil repellency |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2656807B2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61124687A (en) * | 1984-11-20 | 1986-06-12 | 平岡織染株式会社 | Production of water-proof sheet |
NL8501128A (en) * | 1985-04-18 | 1986-11-17 | Stamicarbon | METHOD FOR PREPARING POLYLEFINE ARTICLES WITH GREAT ADHESION FOR POLYMERIC MATRICES, AND FOR PREPARING REINFORCED MATRIX MATERIALS. |
-
1988
- 1988-08-05 JP JP63194627A patent/JP2656807B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0284544A (en) | 1990-03-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102298010B1 (en) | Continuous filament cellulosic nonwoven fabric made by multiple bonding techniques | |
KR19990044385A (en) | Method for forming improved aperture film and absorbent article using final aperture film and final aperture film | |
KR101846813B1 (en) | Use of core-shell particles for anti-wicking application of a yarn or fabric | |
US3833457A (en) | Polymeric complex composite | |
AU2003291804A1 (en) | Treatment of substrates for improving ink adhesion to the substrates | |
US4482603A (en) | Wholly aromatic polyamide fiber non-woven sheet and processes for producing the same | |
JP2656807B2 (en) | Method for producing nonwoven sheet with oil repellency | |
DE1803021A1 (en) | Process for the production of vapor-permeable sheet or web-shaped materials | |
US3619257A (en) | Preparation of plural layer synthetic leather and the like | |
US7208202B2 (en) | Methods of finishing medical barrier fabrics | |
JP2981535B2 (en) | Polyolefin non-woven sheet | |
GB1168070A (en) | Polyurethane Elastomer Solutions and the manufacture of Flexible Sheet Materials therefrom | |
JP4229815B2 (en) | Manufacturing method of fiber sheet | |
JPH05331767A (en) | Nonwoven fabric | |
US3077423A (en) | Wiping materials and methods of making the same | |
JPH08507108A (en) | Resin impregnated plexifilamentary sheet | |
JPS6367577B2 (en) | ||
US3536639A (en) | Method for producing vapor permeable polyurethane fibers | |
JP2019059390A (en) | Vehicular interior base material | |
US2863715A (en) | Wiping cloth and the manufacture thereof | |
RU2111300C1 (en) | Method of production of nonwoven fibrous-porous material | |
JPH0367141B2 (en) | ||
JP3958548B2 (en) | Hydrophilic polyolefin fiber, method for producing the same, and nonwoven fabric using the same | |
JP2969389B2 (en) | Polyolefin non-woven sheet | |
US20230399531A1 (en) | Surface material |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080530 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090530 Year of fee payment: 12 |
|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090530 Year of fee payment: 12 |