JP2002128928A - Porous film and its manufacturing method - Google Patents
Porous film and its manufacturing methodInfo
- Publication number
- JP2002128928A JP2002128928A JP2000322379A JP2000322379A JP2002128928A JP 2002128928 A JP2002128928 A JP 2002128928A JP 2000322379 A JP2000322379 A JP 2000322379A JP 2000322379 A JP2000322379 A JP 2000322379A JP 2002128928 A JP2002128928 A JP 2002128928A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- porous film
- film
- ricinoleic acid
- density
- 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.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Cell Separators (AREA)
- 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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリオレフィン系
樹脂及び無機充填剤を含む多孔性フィルムに関する。よ
り詳しくは、透湿度が従来品と同レベルにあり、しかも
優れた厚みの均一性と接着性を有し、且つ柔軟性に富ん
で風合いの良い多孔性フィルムおよびその製造方法に関
する。TECHNICAL FIELD The present invention relates to a porous film containing a polyolefin resin and an inorganic filler. More specifically, the present invention relates to a porous film having moisture permeability at the same level as that of a conventional product, having excellent thickness uniformity and adhesiveness, and having good flexibility and good texture, and a method for producing the same.
【０００２】[0002]
【従来の技術】従来、ポリオレフィン樹脂および無機充
填剤を含むフィルムを一軸方向または二軸方向に延伸
し、フィルムに連通したボイドを発生させて多孔性フィ
ルムを製造する方法が多数提案されている。そして、こ
の多孔性フィルムは衛生材料、医療用材料、建築用材
料、電池セパレーター等の多種用途に使用されている。2. Description of the Related Art Hitherto, many methods have been proposed for producing a porous film by stretching a film containing a polyolefin resin and an inorganic filler in a uniaxial or biaxial direction to generate voids communicating with the film. This porous film is used for various purposes such as sanitary materials, medical materials, building materials, battery separators, and the like.
【０００３】フィルムを延伸してボイドを発生させる
際、延伸倍率を高くし過ぎると、樹脂の分子配向が大き
くなるためにフィルムの剛性が大きくなり、フィルムの
ソフト感が損なわれる。一方、延伸倍率を低くし過ぎる
と、延伸開始時に発生する局部的なネッキング現象がフ
ィルムに残り、厚みの均一性が低下してフィルムに斑模
様ができるという問題がある。かかる現象は、フィルム
厚みが薄くなると一層顕著に現れる傾向がある。[0003] When a film is stretched to generate voids, if the stretching ratio is too high, the molecular orientation of the resin is increased, so that the rigidity of the film is increased and the softness of the film is impaired. On the other hand, if the stretching ratio is too low, a local necking phenomenon that occurs at the start of stretching remains in the film, causing a problem that the uniformity of the thickness is reduced and a mottle pattern is formed on the film. Such a phenomenon tends to appear more conspicuously as the film thickness decreases.
【０００４】また、止着テープ等の接着テープのフィル
ムへの接着性が良好であることも求められてきている。
例えば、接着性の悪い多孔性フィルムを使い捨て紙おむ
つのバックシートとして使用した場合、使い捨て紙おむ
つを人体に装着する際に止着テープ等で固定することが
困難であり、人尿等が漏洩する原因となる。[0004] It is also required that adhesive tapes such as fastening tapes have good adhesiveness to films.
For example, when a porous film with poor adhesiveness is used as a back sheet for disposable disposable diapers, it is difficult to fix the disposable disposable diapers with fastening tape or the like when attaching the disposable disposable diapers to a human body, which may cause leakage of human urine and the like. Become.
【０００５】かかる問題を解決する手段として、例え
ば、特開昭６２−２５００３８号公報には、第３成分と
して脂肪酸アミド、流動パラフィン、ソルビタン脂肪酸
エステルの少なくとも１種を添加することが提案されて
いる。そして、第３成分の好ましい例としてオレイン酸
アミド、ステアリン酸アミド等が例示されている。しか
し、本発明者らの知見によれば、オレイン酸アミド、ス
テアリン酸アミド等を用いた場合、柔軟性の付与には効
果が認められるものの、フィルム厚みの均一性、通気
性、接着性のバランスのとれたフィルムは得られない。As a means for solving such a problem, for example, Japanese Patent Application Laid-Open No. Sho 62-250038 proposes to add at least one of fatty acid amide, liquid paraffin and sorbitan fatty acid ester as a third component. . Oleic acid amide, stearic acid amide, and the like are exemplified as preferred examples of the third component. However, according to the findings of the present inventors, when oleic acid amide, stearic acid amide, or the like is used, although the effect of imparting flexibility is recognized, the uniformity of the film thickness, air permeability, and balance of adhesiveness are observed. A loose film cannot be obtained.
【０００６】また、特公平５−３５７３４号公報には、
第３成分としてひまし油を用いることが提案されてい
る。しかし、通気性、柔軟性、フィルム厚みの均一性の
付与には効果が認められるものの、接着性等が満足でき
るものではない。[0006] Japanese Patent Publication No. 5-35734 discloses that
It has been proposed to use castor oil as a third component. However, although an effect is recognized in imparting air permeability, flexibility, and uniformity of film thickness, adhesiveness and the like are not satisfactory.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、上記
問題に鑑み、透湿度が従来品と同レベルにあり、しかも
優れた厚みの均一性と接着性を有し、且つ柔軟性に富ん
で風合いの良い多孔性フィルム、およびその製造方法を
提供することにある。SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to have a moisture permeability at the same level as that of a conventional product, and to have excellent thickness uniformity and adhesiveness, and to have high flexibility. It is an object of the present invention to provide a porous film having a good texture and a manufacturing method thereof.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、上記課題
を解決するために鋭意検討した結果、線状低密度ポリエ
チレンと分岐状低密度ポリエチレンとを特定の割合で含
むポリエチレン系樹脂に対し、特定量の無機充填剤を添
加して樹脂組成物となし、さらに該組成物に対し、リシ
ノール酸縮合物、リシノール酸縮合物の水素添加物、又
はそれらの混合物の特定量を添加することにより、上記
課題が解決された多孔性フィルムが得られることを見い
だし、本発明に至った。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that a polyethylene-based resin containing a linear low-density polyethylene and a branched low-density polyethylene at a specific ratio. By adding a specific amount of an inorganic filler to form a resin composition, and further adding a specific amount of a ricinoleic acid condensate, a hydrogenated ricinoleic acid condensate, or a mixture thereof to the composition. The present inventors have found that a porous film in which the above problems have been solved can be obtained, and have reached the present invention.
【０００９】すなわち、本発明は、メルトインデックス
が０．５〜１０ｇ／１０分で密度が０．８９０〜０．９
４５ｇ／ｃｍ3であるエチレン・α−オレフィン共重合
体７０〜９８重量％と、メルトインデックスが０．１〜
１０ｇ／１０分で密度が０．９１０〜０．９２７ｇ／ｃ
ｍ3である分岐型低密度ポリエチレン２〜３０重量％を
含むポリエチレン系樹脂（Ａ）２５〜５０重量％、並び
に無機充填剤（Ｂ）５０〜７５重量％を含み、且つ
（Ａ）および（Ｂ）１００重量部に対して、リシノール
酸縮合物及びリシノール酸縮合物の水素添加物から選ば
れた少なくとも１種の添加剤０．５〜８重量部を含むこ
とを特徴とする多孔性フィルム、および該多孔性フィル
ムの製造方法である。That is, according to the present invention, the melt index is 0.5 to 10 g / 10 min and the density is 0.890 to 0.9.
70 to 98% by weight of an ethylene / α-olefin copolymer of 45 g / cm 3 and a melt index of 0.1 to
Density 0.910 to 0.927 g / c at 10 g / 10 min
polyethylene resin (A) 25 to 50 wt%, including a branched low density polyethylene 2-30 wt% is m 3, and comprises an inorganic filler (B) 50 to 75 wt%, and (A) and (B A) a porous film comprising 0.5 to 8 parts by weight of at least one additive selected from ricinoleic acid condensate and hydrogenated ricinoleic acid condensate, based on 100 parts by weight; This is a method for producing the porous film.
【００１０】本発明によれば、透湿度が従来品と同レベ
ルに維持し、しかも優れた厚みの均一性と接着性を有
し、且つ柔軟性に富んで風合いの良い多孔性フィルムが
得られる。そのため、本発明の多孔性フィルムは、衛生
材料、医療用材料、建築用材料、電池セパレーター等の
用途に広く使用することができる。特に、使い捨ておむ
つのバックシートとして好適に使用することができる。According to the present invention, it is possible to obtain a porous film having excellent moisture uniformity, excellent thickness uniformity and adhesiveness, excellent flexibility, and good texture while maintaining the same level of moisture permeability as conventional products. . Therefore, the porous film of the present invention can be widely used for applications such as sanitary materials, medical materials, building materials, battery separators, and the like. In particular, it can be suitably used as a backsheet of a disposable diaper.
【００１１】[0011]
【発明の実施の形態】以下、本発明について詳細に説明
する。本発明の多孔性フィルムは、特定のポリエチレン
系樹脂２５〜５０重量％と無機充填剤７５〜５０重量％
とを混合して樹脂組成物となし、さらに該樹脂組成物１
００重量部に対して、リシノール酸縮合物、リシノール
酸縮合物の水素添加物、又はそれらの混合物０．５〜８
重量部を添加し、それを混練、溶融してフィルム状に成
形し、次いで得られたフィルムを少なくとも一軸方向に
延伸することにより製造される。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The porous film of the present invention comprises 25 to 50% by weight of a specific polyethylene resin and 75 to 50% by weight of an inorganic filler.
To form a resin composition, and the resin composition 1
Ricinoleic acid condensate, hydrogenated ricinoleic acid condensate, or a mixture thereof 0.5 to 8 parts by weight
It is manufactured by adding a part by weight, kneading, melting and shaping it into a film, and then stretching the obtained film in at least one direction.
【００１２】本発明に用いるポリエチレン系樹脂は、特
定のエチレン・α−オレフィン共重合体（以下、線状低
密度ポリエチレンという）と分岐状低密度ポリエチレン
とを混合して用いる。線状低密度ポリエチレンは炭素数
が３〜８の分子骨格であるα−オレフィンとエチレンと
の共重合体が好ましい。線状低密度ポリエチレンとして
は、メルトインデックスが０．５〜１０ｇ／１０分、密
度が０．８９０〜０．９４５ｇ／ｃｍ3のものである。
メルトインデックスが０．５ｇ／１０分未満になるとフ
ィルムを押し出すときに異常流動により厚みが均一なフ
ィルムを得ることが難しくなり、１０ｇ／１０分を超え
ると均一延伸性が悪化する。また、密度が０．８９０ｇ
／ｃｍ3未満になると均一延伸性が低下し、０．９４５
ｇ／ｃｍ3を超えると延伸フィルムのソフト感が損なわ
れる。The polyethylene resin used in the present invention is a mixture of a specific ethylene / α-olefin copolymer (hereinafter, referred to as a linear low density polyethylene) and a branched low density polyethylene. The linear low-density polyethylene is preferably a copolymer of ethylene and an α-olefin having a molecular skeleton having 3 to 8 carbon atoms. The linear low-density polyethylene has a melt index of 0.5 to 10 g / 10 min and a density of 0.890 to 0.945 g / cm 3 .
If the melt index is less than 0.5 g / 10 minutes, it is difficult to obtain a film having a uniform thickness due to abnormal flow when extruding the film, and if it exceeds 10 g / 10 minutes, the uniform stretchability is deteriorated. The density is 0.890g
/ Cm 3 , the uniform stretchability is reduced, and
If it exceeds g / cm 3 , the soft feeling of the stretched film is impaired.
【００１３】分岐状低密度ポリエチレンは、エチレンを
公知の高圧法で重合させることによって得られるもの
で、メルトインデックスが０．１〜１０ｇ／１０分、密
度が０．９１０〜０．９２７ｇ／ｃｍ3のものである。
メルトインデックスが０．１ｇ／ｃｍ３未満になると前
者の線状低密度ポリエチレンと混ざり合いが悪くなり、
１０ｇ／１０分を超えると均一厚みのフィルムが得られ
なくなる。The branched low-density polyethylene is obtained by polymerizing ethylene by a known high-pressure method, and has a melt index of 0.1 to 10 g / 10 min and a density of 0.910 to 0.927 g / cm 3. belongs to.
When the melt index is less than 0.1 g / cm3, the mixing with the former linear low-density polyethylene becomes poor,
If it exceeds 10 g / 10 minutes, a film having a uniform thickness cannot be obtained.
【００１４】本発明においては、ポリエチレン系樹脂と
して、線状低密度ポリエチレン７０〜９８重量％、好ま
しくは８５〜９８重量％と、分岐状低密度ポリエチレン
３０〜２重量％、好ましくは１５〜２重量％との混合物
を用いる。分岐状低密度ポリエチレンが３０重量％を超
えると、溶融状態でのフィルムの伸びがなくなり、フィ
ルムに加工することが難しくなる。In the present invention, as the polyethylene resin, 70 to 98% by weight, preferably 85 to 98% by weight of linear low density polyethylene and 30 to 2% by weight, preferably 15 to 2% by weight of branched low density polyethylene are used. % Is used. If the amount of the branched low-density polyethylene exceeds 30% by weight, the film does not elongate in a molten state, and it is difficult to process the film.
【００１５】無機充填剤としては、例えば炭酸カルシウ
ム、硫酸バリウム、硫酸カルシウム、炭酸バリウム、水
酸化マグネシウム、水酸化アルミニウム、酸化亜鉛、酸
化マグネシウム、酸化チタン、シリカ、タルク等が挙げ
られる。これらのうち炭酸カルシウムおよび硫酸バリウ
ムが特に好ましい。無機充填剤の平均粒径は２０μｍ以
下のものが好ましい。さらに好ましくは１０μｍ以下で
あり、０．５〜５μｍのものが最も好ましい。また、無
機充填剤は樹脂との分散性を向上させるために表面処理
が施されたものが好ましい。表面処理剤としては、無機
充填剤の表面を被覆することにより、その表面を疎水化
できるものが好ましく、例えば、ステアリン酸、ラウリ
ン酸等の高級脂肪酸またはそれらの金属塩等を挙げるこ
とができる。Examples of the inorganic filler include calcium carbonate, barium sulfate, calcium sulfate, barium carbonate, magnesium hydroxide, aluminum hydroxide, zinc oxide, magnesium oxide, titanium oxide, silica, and talc. Of these, calcium carbonate and barium sulfate are particularly preferred. The average particle size of the inorganic filler is preferably 20 μm or less. It is more preferably 10 μm or less, and most preferably 0.5 to 5 μm. The inorganic filler is preferably subjected to a surface treatment in order to improve dispersibility with the resin. As the surface treatment agent, those capable of rendering the surface hydrophobic by coating the surface of the inorganic filler are preferable, and examples thereof include higher fatty acids such as stearic acid and lauric acid, and metal salts thereof.
【００１６】前記ポリエチレン系樹脂と無機充填剤との
組成比は、前記ポリエチレン系樹脂が２５〜５０重量
％、好ましくは３５〜４５重量％に対し、無機充填剤が
７５〜５０重量％、好ましくは６５〜５５重量％の範囲
である。無機充填剤が５０重量％未満になると、ポリエ
チレン系樹脂と無機充填剤との界面が剥離してできる隣
接したボイドどうしが連通しなくなり、通気性が得られ
なくなる。また７５重量％を超えると、フィルムの延伸
時の伸びがなくなり、延伸が困難になる。The composition ratio of the polyethylene resin to the inorganic filler is 25 to 50% by weight, preferably 35 to 45% by weight of the polyethylene resin, and 75 to 50% by weight, preferably 35 to 45% by weight of the inorganic filler. It is in the range of 65 to 55% by weight. When the amount of the inorganic filler is less than 50% by weight, adjacent voids formed by peeling off the interface between the polyethylene resin and the inorganic filler are not communicated with each other, so that air permeability cannot be obtained. On the other hand, if it exceeds 75% by weight, elongation during stretching of the film is lost, and stretching becomes difficult.
【００１７】本発明の多孔性フィルムは、線状低密度ポ
リエチレンと特定の分岐状低密度ポリエチレンを含むポ
リエチレン系樹脂、および無機充填剤を含む樹脂組成物
に更に第３成分として、リシノール酸縮合物、リシノー
ル酸縮合物の水素添加物、又はそれらの混合物の特定量
を含むことに特徴がある。The porous film of the present invention comprises a polyethylene resin containing linear low-density polyethylene and a specific branched low-density polyethylene, a resin composition containing an inorganic filler, and a ricinoleic acid condensate as a third component. , A hydrogenated condensate of ricinoleic acid, or a mixture thereof.
【００１８】リシノール酸縮合物、リシノール酸縮合物
の水素添加物、またはこれらの混合物の添加量は、フィ
ルムの厚みの均一性、延伸性、フィルムの風合い、フィ
ルムの成形性、フィルムの接着性などに影響を及ぼす。
添加量が多すぎると、これらがフィルムからブリードア
ウトし、接着性が悪くなる。また、添加量が少なすぎる
とフィルムが硬くなり、風合いが悪くなり、厚み均一性
も悪くなる。かかる点を考慮すると、上記ポリエチレン
系樹脂および無機充填材の合計量１００重量部に対し、
０．５〜８重量部が好ましい。リシノール酸縮合物、リ
シノール酸縮合物の水素添加物は、縮合度により分子量
が異なるが、通常２量体〜１０量体が用いられる。好ま
しくは２量体〜７量体であり、特定の量体単独でも、あ
るいは複数の量体の混合物でも良い。The addition amount of the ricinoleic acid condensate, the hydrogenated ricinoleic acid condensate, or a mixture thereof is determined by the uniformity of the thickness of the film, the stretchability, the texture of the film, the moldability of the film, the adhesiveness of the film, and the like. Affect.
If the added amount is too large, these bleed out from the film, and the adhesiveness is deteriorated. On the other hand, if the addition amount is too small, the film becomes hard, the texture becomes poor, and the thickness uniformity also becomes poor. In consideration of this point, for the total amount of 100 parts by weight of the polyethylene resin and the inorganic filler,
0.5 to 8 parts by weight is preferred. The molecular weight of the ricinoleic acid condensate or hydrogenated ricinoleic acid condensate varies depending on the degree of condensation, but dimers to 10-mers are usually used. It is preferably a dimer to a heptamer, and may be a specific monomer alone or a mixture of plural monomers.
【００１９】本発明の多孔性フィルムには、上記の他に
一般に樹脂組成物用として用いられている添加物、例え
ば酸化防止剤、熱安定剤、光安定剤、紫外線吸収剤、中
和剤、防曇剤、アンチブロッキング剤、帯電防止剤、ス
リップ剤、着色剤等を配合しても良い。The porous film of the present invention may contain, in addition to the above, additives generally used for resin compositions, such as antioxidants, heat stabilizers, light stabilizers, ultraviolet absorbers, neutralizers, and the like. An anti-fogging agent, an anti-blocking agent, an antistatic agent, a slip agent, a coloring agent and the like may be added.
【００２０】本発明の多孔性フィルムは、例えば上記ポ
リオレフィン系樹脂、および無機充填材、並びにリシノ
ール酸縮合物、及びリシノール酸縮合物の水素添加物か
ら選ばれた少なくとも１種の添加剤、必要に応じてその
他の添加剤をヘンシェルミキサー、スーパーミキサー、
タンブラー型ミキサー等を用いて混合した後、一軸ある
いは二軸押出機、ニーダー等で加熱混練し、ペレット化
する。次いで、そのペレットをポリエチレン樹脂の融点
以上、好ましくは融点＋２０℃以上、分解温度未満の温
度において、Ｔダイ等が装着された押出成形機、円形ダ
イが装着されたインフレーション成形機等の公知の押出
機を用いて、溶融、製膜する。場合によっては、ペレッ
ト化せず直接成形機で製膜する事もできる。The porous film of the present invention comprises, for example, the above-mentioned polyolefin resin, an inorganic filler, and at least one additive selected from ricinoleic acid condensate and hydrogenated ricinoleic acid condensate. Other additives according to Henschel mixer, super mixer,
After mixing using a tumbler-type mixer or the like, the mixture is heated and kneaded with a single-screw or twin-screw extruder, a kneader, or the like, and pelletized. The pellets are then extruded at a temperature not lower than the melting point of the polyethylene resin, preferably not lower than the melting point + 20 ° C. and lower than the decomposition temperature, by a known extruder such as an extruder equipped with a T-die or the like or an inflation molder equipped with a circular die. Melting and film formation using a machine. In some cases, the film can be formed directly by a molding machine without pelletizing.
【００２１】製膜されたフィルムは、ロール法、テンタ
ー法等の公知の方法により、室温〜樹脂の軟化点（ＪＩ
Ｓ Ｋ−６７６０に規定される方法により測定した値）
の温度において、少なくとも一軸方向に延伸を行い、ポ
リエチレン系樹脂と無機充填材との界面剥離を起こさせ
ることにより多孔性フィルムを製造する。The formed film is formed at a temperature from room temperature to the softening point (JI) of the resin by a known method such as a roll method or a tenter method.
(Value measured by the method specified in SK-6760)
The film is stretched at least in a uniaxial direction at the temperature described above to cause interfacial delamination between the polyethylene resin and the inorganic filler to produce a porous film.
【００２２】延伸は、一段で行っても良いし、多段階に
分けて行ってもよい。延伸倍率は、延伸時のフィルムの
破れ、得られるフィルムの通気性、フィルムのソフト感
等に関係するので、倍率が高すぎても低くすぎても好ま
しくない。かかる観点から、本発明における延伸倍率は
１．１〜５倍、好ましくは１．２〜３倍である。二軸延
伸する場合は、最初に機械方向、またはそれと直角をな
す方向に一軸延伸し、次いで該方向と直角をなす方向に
二軸目の延伸を行う方法、および機械方向、およびそれ
と直角をなす方向に同時に二軸延伸する方法がある。い
ずれの方法も適用できる。また延伸した後、必要に応じ
て得られた開孔の形態を安定させるために熱固定処理を
行っても良い。熱固定処理としては、樹脂の軟化点〜融
点未満の温度において、０．１〜１００秒間熱処理する
方法が挙げられる。The stretching may be performed in one step or may be performed in multiple steps. The stretching ratio is unfavorable if the ratio is too high or too low, because it is related to the breaking of the film during stretching, the air permeability of the obtained film, the softness of the film, and the like. From such a viewpoint, the stretching ratio in the present invention is 1.1 to 5 times, preferably 1.2 to 3 times. In the case of biaxial stretching, a method of performing uniaxial stretching in the machine direction or a direction perpendicular to the machine direction first, and then performing the second axis stretching in a direction perpendicular to the machine direction, and the machine direction and perpendicular to the machine direction There is a method of performing biaxial stretching simultaneously in the directions. Either method can be applied. After stretching, a heat-setting treatment may be performed as needed to stabilize the form of the obtained holes. As the heat setting treatment, a method of performing a heat treatment at a temperature lower than the softening point of the resin to lower than the melting point for 0.1 to 100 seconds is exemplified.
【００２３】本発明の多孔性フィルムの厚みには特に制
限はないが、通常の厚みは１０〜１００μｍ程度であ
る。１０μｍ未満ではフィルムが破れやすくなり、１０
０μｍを超えるとフィルムが硬くなり、布様のソフト
感、良好な風合いを有する通気性フィルムとなりにくい
ので好ましくない。本発明に係わる多孔性フィルムは厚
みのバラツキが少なく、フィルム厚みの均一性が０．０
１〜０．１５の範囲にある。The thickness of the porous film of the present invention is not particularly limited, but is usually about 10 to 100 μm. When the thickness is less than 10 μm, the film is easily broken.
If it exceeds 0 μm, the film becomes hard, and it is difficult to obtain a breathable film having a cloth-like soft feeling and a good texture, which is not preferable. The porous film according to the present invention has a small thickness variation, and the uniformity of the film thickness is 0.0%.
It is in the range of 1 to 0.15.
【００２４】本発明によって製造される多孔性フィルム
の特性は、無機充填材の充填割合、種類、粒径、分岐状
低密度ポリエチレンの配合割合、リシノール酸縮合物、
リシノール酸縮合物の水素添加物の配合割合、延伸条件
（延伸方向、延伸倍率、延伸温度等）によって自由に変
えることができる。主たる特性としては、例えば、透湿
度は５００〜１００００ｇ／ｍ2・２４ｈｒ、経時後の
接着強度は５００〜２０００ｇ／２５ｍｍの範囲にあ
る。The properties of the porous film produced according to the present invention are as follows: filling ratio of inorganic filler, kind, particle size, blending ratio of branched low density polyethylene, ricinoleic acid condensate,
It can be freely changed depending on the blending ratio of the hydrogenated ricinoleic acid condensate and the stretching conditions (stretching direction, stretching ratio, stretching temperature, etc.). As main characteristics, for example, the moisture permeability is in the range of 500 to 10000 g / m 2 · 24 hr, and the adhesive strength after aging is in the range of 500 to 2000 g / 25 mm.
【００２５】かかる特性を有する多孔性フィルムは、適
度の通気性、透湿性、風合い、並びに優れた厚み均一
性、接着性を有する。そのため、使い捨て紙おむつ、体
液吸収用パット、ベッドシーツ等の衛生材料、手術衣、
温湿布用基材等の医療用材料、ジャンパー、雨着等の衣
料用材料、壁紙、屋根防水材等の建築用材料、乾燥剤、
防湿剤、脱酸素剤、使い捨てカイロ、鮮度保持包装、食
品包装等の包装材、電池用セパレーター等の資材として
極めて好適に使用できる。本発明におけるフィルム厚み
の均一性、透湿度、及び経時後の接着強度は、後述の実
施例に記載した方法により測定した値を意味する。The porous film having such properties has appropriate air permeability, moisture permeability, texture, and excellent thickness uniformity and adhesiveness. Therefore, disposable disposable diapers, pads for absorbing body fluids, sanitary materials such as bed sheets, surgical gowns,
Medical materials such as base materials for warm compresses, clothing materials such as jumpers and rainwear, building materials such as wallpaper and roof waterproofing materials, desiccants,
It can be used very suitably as a moisture proofing agent, a deoxidizing agent, a disposable body warmer, a packaging material for freshness preserving packaging, a food packaging, a battery separator and the like. In the present invention, the uniformity of the film thickness, the moisture permeability, and the adhesive strength after lapse of time mean values measured by the methods described in Examples described later.
【００２６】[0026]
【実施例】以下、本発明について更に具体的に説明する
ため、以下に実施例を示す。尚、本発明はこれらの実施
例に限定されるものではない。実施例に示した透湿度、
フィルム厚みの均一性、経時後の接着強度は、下記方法
により測定した値である。EXAMPLES The present invention will be described in more detail with reference to the following examples. Note that the present invention is not limited to these examples. Moisture permeability shown in the examples,
The uniformity of the film thickness and the adhesive strength after aging are values measured by the following methods.
【００２７】（１）透湿度（ｇ／ｍ2・２４ｈｒ） ＡＳＴＭ Ｅ−９６に規定される方法に基づき、温度４
０℃、相対湿度６０％、純水法の条件で測定する。サン
プルは無作為に１０点採取し、測定時間は２４時間とす
る。(1) Moisture Permeability (g / m 2 · 24 hr) Based on the method specified in ASTM E-96, a temperature of 4
It is measured under the conditions of 0 ° C., 60% relative humidity, and pure water method. Samples are randomly collected at 10 points, and the measurement time is 24 hours.
【００２８】（２）フィルム厚みの均一性 多孔性フィルムから試料〔ＭＤ：１０ｃｍ、ＴＤ：１０
ｃｍ〕を１０枚採取し、１枚につき３ｃｍ間隔で５点、
合計５０箇所の測定点について、厚み測定機（ＰＥＡＣ
ＯＣＫ社製、ＵＰＲＩＧＨＴ ＤＩＡＬ ＧＵＡＧＥ
ＮＯ．２５）を用いて厚みを測定し、平均値（Ｘ）、最
高厚み（ＭＡＸ）、及び最低厚み（ＭＩＮ）を求め、
〔（ＭＡＸ）−（ＭＩＮ）〕／（Ｘ）を算出し、これを
フィムル厚みの均一性とする。(2) Uniformity of film thickness From a porous film, a sample [MD: 10 cm, TD: 10
cm], and 5 points at 3 cm intervals per sheet,
For a total of 50 measurement points, a thickness measuring machine (PEAC
UPRIGHT DIAL GUAGE manufactured by OCK
NO. 25), the average thickness (X), the maximum thickness (MAX), and the minimum thickness (MIN) are determined.
[(MAX)-(MIN)] / (X) is calculated, and this is defined as the uniformity of the film thickness.
【００２９】（３）柔軟性、風合い フィルムを手で触り、折り曲げなどして柔軟性、風合い
を評価する。評価基準は下記の通り。 １：フィルムを折り曲げてもカサカサ音がせず、感触が
大変柔らかいもの。 ２：フィルムを折り曲げてもカサカサ音がせず、感触が
柔らかいもの。 ３：フィルムを折り曲げてもカサカサ音はしないが、感
触がやや硬いもの。 ４：フィルムを折り曲げるとややカサカサ音がし、感触
が硬いもの。 ５：フィルムを折り曲げるとカサカサ音がひどく、感触
がかなり硬いもの。(3) Flexibility and texture The flexibility and texture are evaluated by touching and bending the film. The evaluation criteria are as follows. 1: No rustling sound even when the film is bent, and the feel is very soft. 2: The film does not make a rustling sound even when the film is bent, and has a soft touch. 3: The film does not make a crunchy sound even when it is bent, but has a slightly hard feel. 4: When the film is bent, the film makes a slight rustling sound and has a hard feel. 5: When the film is bent, the sound is rustling and the feel is quite hard.
【００３０】（４）経時後の接着強度（ｇ／２５ｍｍ） 多孔性フィルムの片表面に幅２５ｍｍのＰＰテープ（東
洋化学（株）製、商品名：カラリアンＰＰ、接着剤層
付）を貼付して試料とし、この試料を６０℃のオーブン
中に４８時間放置した後、テンシロン引張試験機（東洋
ボールドウィン社製、商品名：テンシロン）を用いて、
ＰＰテープを剥離する際の剥離応力をＪＩＳ Ｚ０２３
７に規定される１８０度引き剥がし法により測定する。(4) Adhesive strength after aging (g / 25 mm) A PP tape having a width of 25 mm (trade name: Calarian PP, with an adhesive layer, manufactured by Toyo Chemical Co., Ltd.) was attached to one surface of the porous film. After leaving the sample in an oven at 60 ° C. for 48 hours, using a Tensilon tensile tester (trade name: Tensilon, manufactured by Toyo Baldwin Co., Ltd.)
According to JIS Z023, the peeling stress when the PP tape is peeled off
It is measured by the 180-degree peeling method specified in 7.
【００３１】（５）外観 縦１００ｃｍ、横３０ｃｍの多孔性フィルムの表面を目
視観察する。評価基準は以下の通り。均一：延伸のムラ
による斑模様の発生が認められないもの。不均一：延伸
のムラによる斑模様が発生しているもの。(5) Appearance The surface of the porous film having a length of 100 cm and a width of 30 cm is visually observed. The evaluation criteria are as follows. Uniform: No uneven pattern is observed due to uneven stretching. Non-uniform: A spot pattern due to stretching unevenness has occurred.
【００３２】実施例１ 線状低密度ポリエチレン（密度：９２０ｇ／ｃｍ3 、メ
ルトインデックス：４．０ｇ／１０ｍｉｎ）３８．４重
量部、分岐状低密度ポリエチレン（密度：９２２ｇ／ｃ
ｍ3、メルトインデックス：１．１ｇ／１０ｍｉｎ）
１．６重量部に対し、炭酸カルシウム（同和カルファイ
ン（株）製、商品名：ＳＳＴ−４０）６０重量部、ステ
アリン酸カルシウム１重量部、およびリシノール酸縮合
物（３量体が主成分）３重量部をタンブラーミキサーに
て混合した後、タンデム型押出機を用いて２３０℃にお
いて均一に混練しペレット状に加工した。このペレット
をＴダイが装着された押出成形機を用いて、２３０℃に
おいて溶融押出して未延伸フィルムを得た。得られた未
延伸フィルムを６５℃に加熱した予熱ロールと延伸ロー
ルとの間で２．０倍の延伸倍率で機械方向に一軸延伸
し、厚み２５μｍの多孔性フィルムを得た。得られた多
孔性フィルムの諸物性を上記方法により測定した。原料
の種類およびその配合割合（重量部）を表１、得られた
特性を表２にそれぞれ示す。Example 1 38.4 parts by weight of linear low-density polyethylene (density: 920 g / cm 3 , melt index: 4.0 g / 10 min), branched low-density polyethylene (density: 922 g / c)
m 3 , melt index: 1.1 g / 10 min)
With respect to 1.6 parts by weight, 60 parts by weight of calcium carbonate (trade name: SST-40 manufactured by Dowa Calfine Co., Ltd.), 1 part by weight of calcium stearate, and ricinoleic acid condensate (mainly trimer) 3 After mixing parts by weight with a tumbler mixer, the mixture was uniformly kneaded at 230 ° C. using a tandem extruder and processed into pellets. The pellet was melt-extruded at 230 ° C. using an extruder equipped with a T-die to obtain an unstretched film. The obtained unstretched film was uniaxially stretched in the machine direction at a stretch ratio of 2.0 times between a preheating roll heated at 65 ° C. and a stretch roll to obtain a porous film having a thickness of 25 μm. Various physical properties of the obtained porous film were measured by the above methods. Table 1 shows the types of raw materials and their mixing ratios (parts by weight), and Table 2 shows the properties obtained.
【００３３】実施例２ 実施例１のリシノール酸３量体の量を６重量部に変更し
た以外は、実施例１と同じ方法で多孔性フィルムを得
た。得られた結果を表１および表２に示す。Example 2 A porous film was obtained in the same manner as in Example 1 except that the amount of ricinoleic acid trimer was changed to 6 parts by weight. The obtained results are shown in Tables 1 and 2.
【００３４】実施例３ 実施例１のリシノール酸３量体の量を１．５重量部に変
更した以外は、実施例１と同じ方法で多孔性フィルムを
得た。得られた結果を表１および表２に示す。Example 3 A porous film was obtained in the same manner as in Example 1, except that the amount of ricinoleic acid trimer was changed to 1.5 parts by weight. The obtained results are shown in Tables 1 and 2.
【００３５】実施例４ 実施例３の分岐状低密度ポリエチレンを４重量部に変更
した以外は、実施例３と同じ方法で多孔性フィルムを得
た。得られた結果を表１および表２に示す。Example 4 A porous film was obtained in the same manner as in Example 3 except that the branched low-density polyethylene of Example 3 was changed to 4 parts by weight. The obtained results are shown in Tables 1 and 2.
【００３６】実施例５ 実施例３の分岐状低密度ポリエチレンの種類を変更（メ
ルトインデックス：９．５ｇ／１０分、密度：０．９１
７ｇ／ｃｍ３、商品名：三井化学株式会社ミラソン１０
Ｐ）し、更にその量を１０重量部に変更した以外は、実
施例３と同じ方法で多孔性フィルムを得た。得られた結
果を表１および表２に示す。Example 5 The type of the branched low-density polyethylene of Example 3 was changed (melt index: 9.5 g / 10 min, density: 0.91)
7 g / cm 3 , trade name: Mirason 10 by Mitsui Chemicals, Inc.
P), and a porous film was obtained in the same manner as in Example 3, except that the amount was changed to 10 parts by weight. The obtained results are shown in Tables 1 and 2.
【００３７】実施例６ 実施例１の添加剤をリシノール酸３量体の水素添加物
１．５重量部に変更した以外は、実施例１と同じ方法で
多孔性フィルムを得た。得られた結果を表１および表２
に示す。Example 6 A porous film was obtained in the same manner as in Example 1 except that the additive of Example 1 was changed to 1.5 parts by weight of a hydrogenated ricinoleic acid trimer. Table 1 and Table 2 show the obtained results.
Shown in
【００３８】実施例７ 実施例１の添加剤をリシノール酸５量体に変更した以外
は、実施例１と同じ方法で多孔性フィルムを得た。得ら
れた結果を表１および表２に示す。Example 7 A porous film was obtained in the same manner as in Example 1 except that the additive in Example 1 was changed to ricinoleic acid pentamer. The obtained results are shown in Tables 1 and 2.
【００３９】実施例８ 実施例１の添加剤をリシノール酸５量体の水素添加物と
した以外は、実施例１と同じ方法で多孔性フィルムを得
た。得られた結果を表１および表２に示す。Example 8 A porous film was obtained in the same manner as in Example 1, except that the additive of Example 1 was a hydrogenated ricinoleic acid pentamer. The obtained results are shown in Tables 1 and 2.
【００４０】実施例９ 実施例１の線状低密度ポリエチレンを変更（メルトイン
デックス：９．０ｇ／１０分、密度：０．９２０ｇ／ｃ
ｍ３、商品名：三井化学株式会社ウルトゼックス２０１
００Ｊ）に変更し、さらに分岐状低密度ポリエチレンを
変更（メルトインデックス：９．５ｇ／１０分、密度：
０．９１７ｇ／ｃｍ3、商品名：三井化学株式会社ミラ
ソン１０Ｐ）した以外は、実施例１と同じ方法で多孔性
フィルムを得た。得られた結果を表１および表２に示
す。Example 9 The linear low-density polyethylene of Example 1 was changed (melt index: 9.0 g / 10 min, density: 0.920 g / c)
m3, Trade name: Mitsui Chemicals, Inc. Ultzex 201
00J) and further the branched low density polyethylene (melt index: 9.5 g / 10 min, density:
A porous film was obtained in the same manner as in Example 1 except that 0.917 g / cm 3 , trade name: Mirason 10P, Mitsui Chemicals, Inc. was used. The obtained results are shown in Tables 1 and 2.
【００４１】比較例１ 実施例１の添加剤を無添加とした以外は、実施例１と同
じ方法で多孔性フィルムを得た。得られた結果を表１お
よび表２に示す。Comparative Example 1 A porous film was obtained in the same manner as in Example 1 except that the additive of Example 1 was not added. The obtained results are shown in Tables 1 and 2.
【００４２】比較例２ 実施例５の添加剤を無添加とした以外は、実施例５と同
じ方法で多孔性フィルムを得た。得られた結果を表１お
よび表２に示す。Comparative Example 2 A porous film was obtained in the same manner as in Example 5 except that the additive of Example 5 was not added. The obtained results are shown in Tables 1 and 2.
【００４３】比較例３ 実施例１の添加剤をひまし油とした以外は、実施例１と
同じ方法で多孔性フィルムを得た。得られた結果を表１
および表２に示す。Comparative Example 3 A porous film was obtained in the same manner as in Example 1 except that castor oil was used as the additive in Example 1. Table 1 shows the obtained results.
And Table 2.
【００４４】比較例４ 実施例１の添加剤量を０．２重量部とした以外は、実施
例１と同じ方法で多孔性フィルムを得た。得られた結果
を表１および表２に示す。Comparative Example 4 A porous film was obtained in the same manner as in Example 1, except that the amount of the additive was changed to 0.2 part by weight. The obtained results are shown in Tables 1 and 2.
【００４５】比較例５ 実施例１の添加剤量を１３重量部とした以外は、実施例
１と同じ方法で多孔性フィルムを得た。得られた結果を
表１および表２に示す。Comparative Example 5 A porous film was obtained in the same manner as in Example 1 except that the amount of the additive was changed to 13 parts by weight. The obtained results are shown in Tables 1 and 2.
【００４６】[0046]
【表１】 [Table 1]
【００４７】＜表１の記号の説明＞Ａ：三井化学株式会
社製、商品名：エボリューＳＰ２０４０、Ｂ：三井化学
株式会社製、商品名：ウルトゼックス２０１００Ｊ、
Ｃ：三井化学株式会社製、商品名：ミラソンＦ９６７、
Ｄ：三井化学株式会社製、商品名：ミラソン１０Ｐ、
Ｅ：リシノール酸３量体、Ｆ：リシノール酸３量体の水
素添加物、Ｇ：リシノール酸５量体、Ｈ：リシノール酸
５量体の水素添加物、Ｉ：ひまし油。<Description of symbols in Table 1> A: manufactured by Mitsui Chemicals, Inc., trade name: Evolu SP2040, B: manufactured by Mitsui Chemicals, Inc., trade name: Ultzex 20100J,
C: manufactured by Mitsui Chemicals, Inc., trade name: Mirason F967,
D: manufactured by Mitsui Chemicals, Inc., trade name: Mirason 10P,
E: ricinoleic acid trimer, F: hydrogenated ricinoleic acid trimer, G: ricinoleic acid pentamer, H: hydrogenated product of ricinoleic acid pentamer, I: castor oil.
【００４８】[0048]
【表２】 [Table 2]
【００４９】[0049]
【発明の効果】本発明の多孔性フィルムは、厚みの均一
性、通気性、接着性が良好で、風合いの優れた多孔性フ
ィルムである。The porous film of the present invention is a porous film having good thickness uniformity, good air permeability and good adhesion, and excellent texture.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０１Ｍ 2/16 Ｈ０１Ｍ 2/16 Ｐ //(Ｃ０８Ｌ 23/08 (Ｃ０８Ｌ 23/08 23:06） 23:06） Ｂ２９Ｋ 23:00 Ｂ２９Ｋ 23:00 105:04 105:04 105:16 105:16 Ｂ２９Ｌ 7:00 Ｂ２９Ｌ 7:00 (72)発明者 子松 時博 愛知県名古屋市南区丹後通２丁目１番地 三井化学株式会社内 Ｆターム(参考） 4F074 AA20 AA21 AA98 AB05 AC26 AD09 AG20 CA02 CC02Y CC04X DA17 DA23 DA24 4F210 AA04C AA04E AA07 AA07C AA08 AB01 AB11 AB19 AG01 AG20 AR06 QC01 QC05 QD25 QG01 QG18 QW06 4J002 BB042 BB051 DE076 DE106 DE146 DE236 DG046 DG056 DJ016 DJ046 EF047 FD016 5H021 AA06 BB01 BB05 EE01 EE04 EE15 EE21 EE22 EE23 EE31 HH00 HH01 HH03 HH05 HH06──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H01M 2/16 H01M 2/16 P // (C08L 23/08 (C08L 23/08 23:06) 23: 06) B29K 23:00 B29K 23:00 105: 04 105: 04 105: 16 105: 16 B29L 7:00 B29L 7:00 (72) Inventor Tokihiro Komatsu 2-1-1 Tangodori, Minami-ku, Nagoya-shi, Aichi Prefecture. Address Mitsui Chemicals Co., Ltd. F term (reference) 4F074 AA20 AA21 AA98 AB05 AC26 AD09 AG20 CA02 CC02Y CC04X DA17 DA23 DA24 4F210 AA04C AA04E AA07 AA07C AA08 AB01 AB11 AB19 AG01 AG20 AR06 QC01 QC05 QD25 QG01 DEB Q18DEB DG046 DG056 DJ016 DJ046 EF047 FD016 5H021 AA06 BB01 BB05 EE01 EE04 EE15 EE21 EE22 EE23 EE31 HH00 HH01 HH03 HH05 HH06
Claims (7)
１０分で密度が０．８９０〜０．９４５ｇ／ｃｍ3であ
るエチレン・α−オレフィン共重合体７０〜９８重量％
と、メルトインデックスが０．１〜１０ｇ／１０分で密
度が０．９１０〜０．９２７ｇ／ｃｍ3である分岐型低
密度ポリエチレン２〜３０重量％を含むポリエチレン系
樹脂（Ａ）２５〜５０重量％、並びに無機充填剤（Ｂ）
５０〜７５重量％を含み、且つ（Ａ）および（Ｂ）１０
０重量部に対して、リシノール酸縮合物及びリシノール
酸縮合物の水素添加物から選ばれた少なくとも１種の添
加剤０．５〜８重量部を含むことを特徴とする多孔性フ
ィルム。A melt index of 0.5 to 10 g /
70 to 98% by weight of an ethylene / α-olefin copolymer having a density of 0.890 to 0.945 g / cm 3 in 10 minutes
And a polyethylene-based resin (A) containing 2 to 30% by weight of a branched low-density polyethylene having a melt index of 0.1 to 10 g / 10 minutes and a density of 0.910 to 0.927 g / cm 3 , and 25 to 50% by weight. %, And inorganic filler (B)
50-75% by weight and (A) and (B) 10
A porous film comprising 0.5 to 8 parts by weight of at least one additive selected from ricinoleic acid condensate and hydrogenated ricinoleic acid condensate with respect to 0 parts by weight.
ことを特徴とする請求項１に記載の多孔性フィルム。2. The porous film according to claim 1, wherein the film has a thickness of 10 to 100 μm.
２４ｈｒ、厚みの均一性が０．０１〜０．１５であるこ
とを特徴とする請求項１に記載の多孔性フィルム。3. Moisture permeability of 500 to 10000 g / m 2 ···
The porous film according to claim 1, wherein the uniformity of the thickness is 0.01 to 0.15 for 24 hours.
１０分で密度が０．８９０〜０．９４５ｇ／ｃｍ3であ
るエチレン・α−オレフィン共重合体７０〜１００重量
％と、メルトインデックスが０．１〜１０ｇ／１０分で
密度が０．９１０〜０．９２７ｇ／ｃｍ3である分岐型
低密度ポリエチレン２〜３０重量％を含むポリエチレン
系樹脂（Ａ）２５〜５０重量％、並びに無機充填剤
（Ｂ）５０〜７５重量％を含み、且つ（Ａ）および
（Ｂ）１００重量部に対して、リシノール酸縮合物及び
リシノール酸縮合物の水素添加物から選ばれた少なくと
も１種の添加剤０．５〜８重量部を含む樹脂組成物をフ
ィルム状に成形し、得られたフィルムを室温〜樹脂の軟
化温度の範囲において少なくとも一軸方向に１．１〜５
倍延伸することを特徴とする多孔性フィルムの製造方
法。4. A melt index of 0.5 to 10 g /
70 to 100% by weight of an ethylene / α-olefin copolymer having a density of 0.890 to 0.945 g / cm 3 in 10 minutes, and a melt index of 0.1 to 10 g / 10 minutes and a density of 0.910 (A) 25 to 50% by weight of a polyethylene resin containing 2 to 30% by weight of a branched low-density polyethylene of 0.927 g / cm 3 , and 50 to 75% by weight of an inorganic filler (B); A) a resin composition containing 0.5 to 8 parts by weight of at least one additive selected from ricinoleic acid condensate and hydrogenated ricinoleic acid condensate with respect to 100 parts by weight of (B) And the obtained film is at least uniaxially in the range of room temperature to the softening temperature of the resin in the range of 1.1 to 5
A method for producing a porous film, comprising performing double stretching.
度範囲において０．１〜１００秒間加熱処理することを
特徴とする請求項３記載の多孔性フィルムの製造方法。5. The method for producing a porous film according to claim 3, wherein after the stretching, heat treatment is performed for 0.1 to 100 seconds in a temperature range from a softening temperature of the resin to a temperature lower than the melting point.
ることを特徴とする請求項４記載の多孔性フィルムの製
造方法。6. The method for producing a porous film according to claim 4, wherein the thickness of the film is 10 to 100 μm.
２４ｈｒ、厚みの均一性が０．０１〜０．１５であるこ
とを特徴とする請求項４記載の多孔性フィルムの製造方
法。7. A moisture permeability of 500 to 10000 g / m 2 ···
The method for producing a porous film according to claim 4, wherein the uniformity of the thickness is 0.01 to 0.15 for 24 hours.
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| JP2000322379A JP2002128928A (en) | 2000-10-23 | 2000-10-23 | Porous film and its manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000322379A JP2002128928A (en) | 2000-10-23 | 2000-10-23 | Porous film and its manufacturing method |
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| Publication Number | Publication Date |
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| JP2002128928A true JP2002128928A (en) | 2002-05-09 |
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Cited By (5)
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|---|---|---|---|---|
| WO2005015660A1 (en) * | 2003-08-06 | 2005-02-17 | Mitsubishi Chemical Corporation | Separator for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery including the same |
| JP2005228512A (en) * | 2004-02-10 | 2005-08-25 | Mitsubishi Chemicals Corp | Non-aqueous electrolytic solution secondary battery |
| JP2005346987A (en) * | 2004-05-31 | 2005-12-15 | Mitsubishi Plastics Ind Ltd | Porous film, battery and separator therefor |
| EP1705736A1 (en) * | 2003-12-15 | 2006-09-27 | Mitsubishi Chemical Corporation | Nonaqueous electrolyte secondary battery |
| CN109088031A (en) * | 2018-08-20 | 2018-12-25 | 湖南烁普新材料有限公司 | Ceramic coating membrane slurry, Ceramic Composite diaphragm and its preparation method and application |
-
2000
- 2000-10-23 JP JP2000322379A patent/JP2002128928A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005015660A1 (en) * | 2003-08-06 | 2005-02-17 | Mitsubishi Chemical Corporation | Separator for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery including the same |
| US8003262B2 (en) | 2003-08-06 | 2011-08-23 | Mitsubishi Chemical Corporation | Nonaqueous electrolyte solution secondary battery separator having defined ratio of average pore diameter to maximum pore diameter and nonaqueous electrolyte solution secondary battery using the same |
| US8597836B2 (en) | 2003-08-06 | 2013-12-03 | Mitsubishi Chemical Corporation | Nonaqueous electrolyte solution secondary battery separator having filler and controlled impurities |
| EP1705736A1 (en) * | 2003-12-15 | 2006-09-27 | Mitsubishi Chemical Corporation | Nonaqueous electrolyte secondary battery |
| EP1705736A4 (en) * | 2003-12-15 | 2009-12-09 | Mitsubishi Chem Corp | Nonaqueous electrolyte secondary battery |
| US8137846B2 (en) | 2003-12-15 | 2012-03-20 | Mitsubishi Chemical Corporation | Nonaqueous-electrolyte secondary battery |
| EP2472639A1 (en) * | 2003-12-15 | 2012-07-04 | Mitsubishi Chemical Corporation | Nonaqueous-electrolyte secondary battery |
| JP2005228512A (en) * | 2004-02-10 | 2005-08-25 | Mitsubishi Chemicals Corp | Non-aqueous electrolytic solution secondary battery |
| JP2005346987A (en) * | 2004-05-31 | 2005-12-15 | Mitsubishi Plastics Ind Ltd | Porous film, battery and separator therefor |
| CN109088031A (en) * | 2018-08-20 | 2018-12-25 | 湖南烁普新材料有限公司 | Ceramic coating membrane slurry, Ceramic Composite diaphragm and its preparation method and application |
| CN109088031B (en) * | 2018-08-20 | 2021-08-27 | 湖南烁普新材料有限公司 | Ceramic coating diaphragm slurry, ceramic composite diaphragm and preparation method and application thereof |
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