JPH0699580B2 - Porous film - Google Patents
Porous filmInfo
- Publication number
- JPH0699580B2 JPH0699580B2 JP61123000A JP12300086A JPH0699580B2 JP H0699580 B2 JPH0699580 B2 JP H0699580B2 JP 61123000 A JP61123000 A JP 61123000A JP 12300086 A JP12300086 A JP 12300086A JP H0699580 B2 JPH0699580 B2 JP H0699580B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- porous film
- filler
- component
- stretching
- 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 - Fee Related
Links
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は多孔性フィルムに関するものであり、その目的
とするところは、衛生材料、中でもつかいすておむつの
透湿防漏フィルムの如く、止着テープにより止着テープ
と共に止着機能を分担する構成素材であると同時に、し
なやかな風合、良好な透湿防漏性・強度を合わせ持つこ
とを必要とする多孔性フィルムを提供することである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a porous film, and an object of the present invention is to provide a sanitary material, especially a breathable leak-proof film for diapers. By providing a porous film that is a constituent material that shares the fastening function with the fastening tape by the adhesive tape, and at the same time has a supple texture, good moisture permeability and leak resistance / strength. is there.
ポリオレフィン樹脂に充填剤を混練りし、溶融成形加工
して得たフィルムを１軸又は２軸延伸することにより、
多孔性フィルムを得る試みは従来から数多く行われてい
る。By kneading a polyolefin resin with a filler and uniaxially or biaxially stretching a film obtained by melt molding,
Many attempts have been made to obtain a porous film.
これら多孔性フィルムにおいては、１軸延伸では強度の
異方性、即ち延伸方向の引裂強度及び横方向の引張応力
が極めて弱いという問題点がある。該強度の異方性を改
良する方法として、できるだけ低倍率で延伸する方法が
あるが、低倍率延伸では均一な延伸フィルムが得られな
い。These porous films have a problem that uniaxial stretching has extremely weak strength anisotropy, that is, tear strength in the stretching direction and tensile stress in the transverse direction. As a method of improving the anisotropy of strength, there is a method of stretching at a draw ratio as low as possible, but a stretched film at a low draw ratio cannot provide a uniform stretched film.
又、２軸延伸においては、強度の異方性という問題点は
解決されるが、延伸性が著しく悪くなるという問題点を
生じる。In biaxial stretching, although the problem of strength anisotropy is solved, the problem of markedly deteriorated drawability occurs.
他方、ポリオレフィン樹脂と充填剤だけの配合系では、
延伸してもしなやかな風合を有する多孔性フィルムは得
られない。近年これらの問題点を解決する手段として、
ポリオレフィン樹脂と充填剤の系に第３成分として液状
炭化水素を始めとするいくつかの添加剤の配合系が提案
されている。例えば、上記問題点を改良する第３成分と
して、特開昭58-15538号公報には、液状ポリブタジエ
ン、液状ポリブテン、末端ヒドロキシ液状ポリブタジエ
ンが、特開昭58-149925号公報には、液状ポリイソプレ
ンゴムが開示されている。On the other hand, in the compounding system of only polyolefin resin and filler,
Even if stretched, a porous film having a supple texture cannot be obtained. As a means to solve these problems in recent years,
A combination system of several additives including a liquid hydrocarbon as a third component has been proposed in the system of the polyolefin resin and the filler. For example, as a third component for improving the above problems, JP-A-58-15538 discloses liquid polybutadiene, liquid polybutene, and liquid hydroxy terminated polybutadiene, and JP-A-58-149925 discloses liquid polyisoprene. Rubber is disclosed.
しかしながら、これら改良技術でも透湿性と延伸方向の
引裂強度（タテ裂け強度）のバランス面では十分満足で
きるものではない。特につかいすておむつの透湿防漏フ
ィルムの如く、止着テープにより止着テープと共に止着
機能を分担する構成素材として使用される場合には、タ
テ裂け強度が弱いと該止着テープのつけはがし時及び使
用時には、透湿防漏フィルムの該止着テープ周囲部分
に、局部的に応力が集中するために止着テープ周囲部分
での破れを生じ、使用分野が極めて限定される。However, even these improved techniques are not sufficiently satisfactory in terms of the balance between moisture permeability and tear strength in the stretching direction (vertical tear strength). Especially when it is used as a constituent material that shares a fastening function with a fastening tape, such as a moisture-permeable leak-proof film of a diaper, it is difficult to attach the fastening tape if the vertical tear strength is weak. At the time of peeling and during use, the stress is locally concentrated on the portion around the fastening tape of the moisture-permeable leakproof film, so that tearing occurs at the portion around the fastening tape, and the field of use is extremely limited.
本発明者らは、前述の問題点を解決した多孔性フィルム
を提供することを目的として鋭意検討の結果、第３成分
としてモノエステルを配合することにより、多孔性フィ
ルムにおけるしなやかな風合と良好な透湿防漏性を維持
した上で、タテ裂け強度を向上させ得ることを見出し本
発明を完成するに到った。The inventors of the present invention have conducted intensive studies for the purpose of providing a porous film that solves the above-mentioned problems, and as a result, by adding a monoester as the third component, the porous film has a supple texture and good texture. The inventors have found that the vertical tear strength can be improved while maintaining a good moisture-permeable leakproof property, and have completed the present invention.
即ち、本発明は、ポリオレフィン樹脂、充填剤及び第３
成分を含有する組成物を溶融成形してフィルムとなし、
次いで該フィフムを1.5〜3.0倍の１軸延伸処理して得た
多孔性フィルムであって、該第３成分が合計炭素数38以
上のモノエステルであり、該モノエステルを構成する
酸、アルコールの少なくとも一方が分岐状であることを
特徴とする衛生材料の透湿防漏シート用多孔性フィルム
に係わるものである。That is, the present invention relates to a polyolefin resin, a filler, and a third
A composition containing the components is melt-formed into a film,
Next, a porous film obtained by subjecting the film to a uniaxial stretching treatment of 1.5 to 3.0 times, wherein the third component is a monoester having a total carbon number of 38 or more, and an acid or an alcohol constituting the monoester is used. The present invention relates to a porous film for a moisture-permeable leakproof sheet of a sanitary material, characterized in that at least one is branched.
以下、本発明を更に詳細に説明する。Hereinafter, the present invention will be described in more detail.
本発明に使用されるポリオレフィン樹脂とは、エチレ
ン、プロピレン、ブテン等のモノオレフィン重合体及び
共重合体を主成分とするものをいい、例えば高密度ポリ
エチレン、低密度ポリエチレン、線状低密度ポリエチレ
ン、ポリプロピレン、エチレン−プロピレンブロック共
重合体、ポリブテン、エチレン−酢酸ビニル共重合体及
びこれらの混合物が挙げられる。中でも線状低密度ポリ
エチレンがしなやかで強靱であることから好ましい。The polyolefin resin used in the present invention refers to those containing ethylene, propylene, butene and other monoolefin polymers and copolymers as main components, for example, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, Examples include polypropylene, ethylene-propylene block copolymers, polybutene, ethylene-vinyl acetate copolymers, and mixtures thereof. Of these, linear low-density polyethylene is preferable because it is flexible and tough.
本発明において、充填剤としては、無機及び有機の充填
剤が用いられ、無機充填剤としては、炭酸カルシウム、
石膏、タルク、クレー、カオリン、シリカ、珪藻土、炭
酸マグネシウム、炭酸バリウム、硫酸マグネシウム、硫
酸バリウム、燐酸カルシウム、水酸化アルミニウム、酸
化亜鉛、酸化チタン、アルミナ、マイカ、ゼオライト、
カーボンブラック等が使用され、有機充填剤としては、
木粉、パルプ粉等が使用される。これらは単独で又は混
合して使用してもよい。In the present invention, as the filler, inorganic and organic fillers are used, and as the inorganic filler, calcium carbonate,
Gypsum, talc, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, barium carbonate, magnesium sulfate, barium sulfate, calcium phosphate, aluminum hydroxide, zinc oxide, titanium oxide, alumina, mica, zeolite,
Carbon black or the like is used, and as the organic filler,
Wood flour, pulp flour, etc. are used. You may use these individually or in mixture.
充填剤の平均粒径は30μ以下のものが好ましく、10μ以
下、更に好ましくは0.5〜5.0μのものが最も好ましい。The average particle size of the filler is preferably 30 μm or less, more preferably 10 μm or less, and most preferably 0.5 to 5.0 μm.
充填剤の表面処理は、樹脂への均一分散に重要であり、
表面処理剤としては脂肪酸又はその金属塩等、表面を疎
水化できるものが好ましい。Surface treatment of the filler is important for uniform dispersion in the resin,
The surface treatment agent is preferably one that can make the surface hydrophobic, such as fatty acid or a metal salt thereof.
本発明に使用されるモノエステルとしては、炭素数１〜
40のモのカルボン酸と、炭素数１〜40のモノアルコール
とから脱水して得られる合計炭素数が38以上の分岐鎖を
含むモノエステルである。The monoester used in the present invention has 1 to 1 carbon atoms.
It is a monoester containing a branched chain having a total carbon number of 38 or more, which is obtained by dehydration from a 40-carboxylic acid and a monoalcohol having 1 to 40 carbon atoms.
好ましい具体的なモノエステルとしては、２−デシルテ
トラデシルステアレート、２−オクタデシルベヘネー
ト、或いはα−分岐脂肪酸（炭素数18〜40）とモノアル
コール（炭素数６〜36）とのエステル（合計炭素数38以
上）等が挙げられる。Preferable specific monoesters include 2-decyl tetradecyl stearate, 2-octadecyl behenate, or esters of α-branched fatty acid (C18 to C40) and monoalcohol (C6 to C36) ( The total carbon number is 38 or more).
本発明におけるポリオレフィン樹脂、充填剤及び第３成
分の好ましい配合割合は、ポリオレフィン樹脂100重量
部に対し、充填剤50〜250重量部、第３成分５〜50重量
部である。The preferred blending ratio of the polyolefin resin, the filler and the third component in the present invention is 50 to 250 parts by weight of the filler and 5 to 50 parts by weight of the third component to 100 parts by weight of the polyolefin resin.
ポリオレフィン樹脂、充填剤及び第３成分の混合は通常
の方法で行える。例えばヘンシェルミキサー等で予備混
合の後、２軸押出機で混練りすることができる。The polyolefin resin, the filler and the third component can be mixed by a usual method. For example, after premixing with a Henschel mixer or the like, kneading with a twin-screw extruder can be performed.
フィルムの成形についても通常の方法、即ち、インフレ
ーション法、Ｔダイ法いずれでもよい。延伸処理は延伸
倍率が1.5〜3.0倍の１軸延伸である。The film may be formed by a usual method, that is, an inflation method or a T-die method. The stretching treatment is uniaxial stretching with a stretch ratio of 1.5 to 3.0.
以下、実施例により本発明を更に詳細に説明するが、本
発明はこれらの実施例に限定されるものではない。Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
尚、実施例に使用したエステルの組成及び特性値を表１
に示す。これらのエステルは通常の脱水エステル化反応
により製造した。The composition and characteristic values of the ester used in the examples are shown in Table 1.
Shown in. These esters were produced by a conventional dehydration esterification reaction.
実施例１ 線状低密度ポリエチレン樹脂（ウルトゼックス 3021F,
三井石油化学（株）製）100重量部、表面処理炭酸カル
シウム（平均粒径１μ）150重量部に、第３成分として
エステルE1 30重量部をスーパーミキサーで予備混合
し、得られた混合物を２軸混練り機PCM−45（池貝鉄工
（株）製）により混練りし造粒した。これをスクリュー
径50mmの押出機でＴダイにより製膜し、厚さ70μのフィ
ルムを得た。かくして得られたフィルムをロール１軸延
伸機で１軸方向に延伸した。延伸条件は次の通りであっ
た。 Example 1 Linear low density polyethylene resin (Ultzex 3021F,
100 parts by weight of Mitsui Petrochemical Co., Ltd., 150 parts by weight of surface-treated calcium carbonate (average particle size 1 μ), and 30 parts by weight of ester E1 as the third component were premixed with a super mixer, and the resulting mixture was mixed with 2 parts. A shaft kneader PCM-45 (manufactured by Ikegai Tekko KK) was used to knead and granulate. This was film-formed by a T-die with an extruder having a screw diameter of 50 mm to obtain a film having a thickness of 70 μm. The film thus obtained was uniaxially stretched by a roll uniaxial stretching machine. The stretching conditions were as follows.
フィルム巾＝400mm 予熱温度＝80℃ 延伸温度＝50℃ 延伸倍率＝2.2倍 引き取りスピード＝22m/分 得られた多孔性フィルムの性能を表２に示す。各性能項
目の試験方法は次の通りである。Film width = 400 mm Preheating temperature = 80 ° C. Stretching temperature = 50 ° C. Stretching ratio = 2.2 times Pulling speed = 22 m / min Table 2 shows the performance of the obtained porous film. The test method for each performance item is as follows.
透湿度:JIS Z−0208に準じた。Water vapor transmission rate: According to JIS Z-0208.
タテ裂け強度:JIS P−8116に準じた。Vertical tear strength: According to JIS P-8116.
実施例2,3 第３成分を表２の通り変えた他は、実施例１と全く同様
にして多孔性フィルムを得た。Examples 2 and 3 A porous film was obtained in exactly the same manner as in Example 1 except that the third component was changed as shown in Table 2.
それぞれの性能評価結果を表２に示す。Table 2 shows the respective performance evaluation results.
比較例１〜４ 第３成分としてエステルを使用せずに、第２に示した炭
化水素を使用した以外は実施例１と全く同様にして多孔
性フィルムを得た。Comparative Examples 1 to 4 Porous films were obtained in the same manner as in Example 1 except that the hydrocarbon shown in the second item was used without using the ester as the third component.
それぞれの性能評価結果を第２に示す。Secondly, the respective performance evaluation results are shown.
〔発明の効果〕 つかいすておむつ等の衛生材料で使用される透湿防漏シ
ートにおいては、JIS Z−0208による透湿度が1.0g/100c
m2Hr以上あれば、使用時のムレ防止の効果が認められ
る。表２において、比較例１〜２は透湿度についてはま
ず良好範囲にあるものの、タテ裂け強度は極めて弱く、
止着テープと共に止着機能を分担すべき分野では使用に
耐えない。比較例３〜４はタテ裂け強度がそこそこある
ものの、透湿度は極めて小さく、使用時のムレ防止は殆
ど期待できない。 [Advantages of the Invention] In a moisture-permeable leak-proof sheet used for sanitary materials such as diapers, the moisture permeability according to JIS Z-0208 is 1.0 g / 100c.
If it is m 2 Hr or more, the effect of preventing stuffiness during use is recognized. In Table 2, Comparative Examples 1 and 2 are in the good range for moisture permeability, but the vertical tear strength is extremely weak.
It cannot be used in the field where the fastening function should be shared with the fastening tape. In Comparative Examples 3 to 4, although the vertical tear strength is moderate, the water vapor transmission rate is extremely small, and stuffiness prevention during use can hardly be expected.
一方、本発明による実施例１〜３においては、透湿度と
タテ裂け強度に大幅な向上が認められた。即ち、1.0g/1
00cm2Hr以上の透湿度が得られている比較例１〜２に対
してタテ裂け強度は約4,5倍の向上が認められ、比較例
３〜４に対してはタテ裂け強度の約30％の向上と共に、
透湿度は約2,3倍の向上が認められた。On the other hand, in Examples 1 to 3 according to the present invention, the water vapor permeability and the vertical tear strength were significantly improved. That is, 1.0g / 1
The vertical tear strength was improved about 4,5 times as compared with Comparative Examples 1 and 2 in which the water vapor transmission rate of 00 cm 2 Hr or more was obtained, and about 30% of the vertical tear strength was obtained for Comparative Examples 3 and 4. With the improvement of%,
The water vapor transmission rate was improved about 2-3 times.
Claims (1)
を含有する組成物を溶融成形してフィルムとなし、次い
で該フィルムを1.5〜3.0倍の１軸延伸処理して得た多孔
性フィルムであって、該第３成分が合計炭素数38以上の
モノエステルであり、該モノエステルを構成する酸、ア
ルコールの少なくとも一方が分岐状であることを特徴と
する、衛生材料の透湿防漏シート用多孔性フィルム。1. A porous film obtained by melt-molding a composition containing a polyolefin resin, a filler and a third component to form a film, and then subjecting the film to a uniaxial stretching process of 1.5 to 3.0 times. And a third component is a monoester having a total carbon number of 38 or more, and at least one of an acid and an alcohol constituting the monoester is branched, for a moisture-permeable leak-proof sheet for sanitary materials, Porous film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61123000A JPH0699580B2 (en) | 1986-05-28 | 1986-05-28 | Porous film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61123000A JPH0699580B2 (en) | 1986-05-28 | 1986-05-28 | Porous film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62280235A JPS62280235A (en) | 1987-12-05 |
| JPH0699580B2 true JPH0699580B2 (en) | 1994-12-07 |
Family
ID=14849787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61123000A Expired - Fee Related JPH0699580B2 (en) | 1986-05-28 | 1986-05-28 | Porous film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0699580B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI97300C (en) * | 1987-08-27 | 1996-11-25 | Mitsubishi Chemical Mkv Compan | Porous film and absorbent sanitary products |
| JP2571612B2 (en) * | 1988-10-12 | 1997-01-16 | 花王株式会社 | Film production method |
| US5853638A (en) * | 1997-06-27 | 1998-12-29 | Samsung General Chemicals Co., Ltd. | Process for producing stretched porous film |
| PL234834B1 (en) * | 2013-07-11 | 2020-04-30 | Wroclawskie Centrum Badan Eit Spolka Z Ograniczona Odpowiedzialnoscia | The method of obtaining microporous material with a continuous micro and nanoporous structure and the microporous material obtained in this way |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS592689A (en) * | 1982-06-04 | 1984-01-09 | Handai Biseibutsubiyou Kenkyukai | Preparation of novel replicon having high manifestation ability of gene |
-
1986
- 1986-05-28 JP JP61123000A patent/JPH0699580B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62280235A (en) | 1987-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |