JPH06104733B2 - Breathable film and manufacturing method thereof - Google Patents

Breathable film and manufacturing method thereof

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Publication number
JPH06104733B2
JPH06104733B2 JP62123187A JP12318787A JPH06104733B2 JP H06104733 B2 JPH06104733 B2 JP H06104733B2 JP 62123187 A JP62123187 A JP 62123187A JP 12318787 A JP12318787 A JP 12318787A JP H06104733 B2 JPH06104733 B2 JP H06104733B2
Authority
JP
Japan
Prior art keywords
film
weight
parts
stretching
temperature
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
Application number
JP62123187A
Other languages
Japanese (ja)
Other versions
JPS63139925A (en
Inventor
周治 北村
清彦 中江
晃造 児谷
孝典 久米
Original Assignee
住友化学工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 住友化学工業株式会社 filed Critical 住友化学工業株式会社
Priority to DE8787306309T priority Critical patent/DE3779199D1/en
Priority to KR1019870007732A priority patent/KR950002889B1/en
Priority to US07/074,118 priority patent/US4829096A/en
Priority to EP87306309A priority patent/EP0253667B1/en
Priority to CN87104852A priority patent/CN1014794B/en
Publication of JPS63139925A publication Critical patent/JPS63139925A/en
Publication of JPH06104733B2 publication Critical patent/JPH06104733B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/005—Shaping by stretching, e.g. drawing through a die; Apparatus therefor characterised by the choice of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0068—Permeability to liquids; Adsorption
    • B29K2995/0069—Permeability to liquids; Adsorption non-permeable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/73—Processes of stretching

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (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)
  • Wrappers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は通気性フィルム及びその製造方法に関する。詳
しくは、特定のポリエチレン樹脂を樹脂成分とする樹脂
組成物からなる高い通気性、良好な感触・外観および強
度を示す通気性フィルム及びその製造方法に関する。The present invention relates to a breathable film and a method for producing the same. More specifically, the present invention relates to a breathable film made of a resin composition containing a specific polyethylene resin as a resin component and exhibiting high breathability, good feel, appearance and strength, and a method for producing the same.

＜従来の技術＞ 樹脂と充填剤等とからなる樹脂組成物から得られるフィ
ルムを延伸することによって、水等の液体は通過させな
いが水蒸気等の気体は透過させる通気性フィルムが得ら
れることは知られているが（例えば、特開昭58−149303
号公報参照）、高い通気性を示すフィルムを得るために
は該樹脂組成物中の充填剤の配合割合を増やしたり、延
伸倍率を上げなければならない。<Prior Art> It is known that a film obtained from a resin composition comprising a resin and a filler can be stretched to obtain a breathable film that does not allow passage of liquids such as water but allows passage of gases such as water vapor. (For example, JP-A-58-149303).
In order to obtain a film having high air permeability, it is necessary to increase the blending ratio of the filler in the resin composition or increase the draw ratio.

＜発明が解決しようとする問題点＞ しかし、通気性を高めるためのこれらの方法は、フィル
ムの成形性や得られたフィルムの強度を低下させるので
適用に限界がある。従って、これらの方法によって、優
れたフィルム成形性と良好なフィルム強度とを有し、且
つ、高い通気性を示すフィルムを得ることはできない。
また、通気性を高めるためにフィルムを低温で延伸する
方法は、得られた通気性フィルムの感触・外観を悪くす
るという問題点を有する。<Problems to be Solved by the Invention> However, these methods for increasing the air permeability are limited in application because they lower the moldability of the film and the strength of the obtained film. Therefore, by these methods, it is not possible to obtain a film having excellent film moldability and good film strength and exhibiting high air permeability.
Further, the method of stretching the film at a low temperature in order to improve the air permeability has a problem that the feel and appearance of the obtained air permeable film are deteriorated.

本発明の目的は、優れたフィルム成形性およびフィルム
延伸性を有し、且つ、高い通気性、良好な感触・外観お
よび強度を示す通気性フィルム及びその製造方法を提供
することである。ここで、優れたフィルム成形性とは、
厚さが均一で薄肉のフィルムを成形することができ、膜
割れやピンホールが生じず、成形速度が大であること等
を言う。また、優れたフィルム延伸性とは、延伸ムラが
なく厚さが均一で、膜割れがなく薄肉のフィルムに延伸
できること等を言う。An object of the present invention is to provide a breathable film having excellent film formability and film stretchability, and having high breathability, good feel / appearance and strength, and a method for producing the same. Here, the excellent film moldability is
It means that a thin film having a uniform thickness can be formed, film cracks and pinholes do not occur, and the forming speed is high. Further, the excellent film stretchability means that it can be stretched into a thin film having no stretching unevenness, a uniform thickness and no film cracking.

＜問題点を解決するための手段＞ 本発明者らは良好な通気性フィルムを得るために鋭意研
究を続けてきた。その結果、特定のポリエチレン樹脂を
樹脂成分とする樹脂組成物が優れたフィルム成形性およ
びフィルム延伸性を有し、且つ、得られた通気性フィル
ムは高い通気性、良好な感触・外観および強度を示すこ
とを知見し、本発明を完成させるに至った。<Means for Solving Problems> The inventors of the present invention have conducted extensive research to obtain a good breathable film. As a result, a resin composition containing a specific polyethylene resin as a resin component has excellent film moldability and film stretchability, and the breathable film obtained has high breathability, good feel / appearance and strength. The present invention has been completed, and the present invention has been completed.

すなわち、本発明は下記（１）〜（４）の通気性フィル
ム及びその製造方法である。That is, the present invention is the following breathable film (1) to (4) and a method for producing the same.

（１） 常温でのキシレン抽出成分の重量平均分子鎖長
が1000〜9000Åであり、該抽出成分の含量が18〜45重量
％であり、密度が0.870〜0.910g/cm3である線状低密度
ポリエチレン樹脂100重量部と充填剤50〜400重量部とを
含む樹脂組成物からなる通気性フィルム。(1) A linear low having a weight average molecular chain length of 1000 to 9000Å of the xylene extract component at room temperature, a content of the extract component of 18 to 45 wt% and a density of 0.870 to 0.910 g / cm 3. A breathable film comprising a resin composition containing 100 parts by weight of a density polyethylene resin and 50 to 400 parts by weight of a filler.

（２） 常温でのキシレン抽出成分の重量平均分子鎖長
が1000〜9000Åであり、該抽出成分の含量が18〜45重量
％であり、密度が0.870〜0.910g/cm3である線状低密度
ポリエチレン樹脂100重量部と充填剤50〜400重量部およ
び非イオン系界面活性剤0.5〜８重量部を含む樹脂組成
物からなる通気性フィルム。(2) A linear low having a weight average molecular chain length of the xylene extract component of 1000 to 9000Å at room temperature, a content of the extract component of 18 to 45 wt% and a density of 0.870 to 0.910 g / cm 3. A breathable film comprising a resin composition containing 100 parts by weight of a density polyethylene resin, 50 to 400 parts by weight of a filler, and 0.5 to 8 parts by weight of a nonionic surfactant.

（３） 常温でのキシレン抽出成分の重量平均分子鎖長
が1000〜9000Åであり、該抽出成分の含量が18〜45重量
％であり、密度が0.870〜0.910g/cm3である線状低密度
ポリエチレン樹脂100重量部と充填剤50〜400重量部とを
含む樹脂組成物から成形されたフィルムを50〜80℃の温
度で縦方向に２〜８倍一軸延伸してなる、または該フィ
ルムを40〜100℃の温度で縦方向に1.1〜８倍延伸したあ
と更に70〜100℃の温度で横方向に６倍以下に二軸延伸
してなる通気性フィルムの製造方法。(3) A linear low having a weight average molecular chain length of the xylene extract component of 1000 to 9000Å at room temperature, a content of the extract component of 18 to 45 wt% and a density of 0.870 to 0.910 g / cm 3. A film formed from a resin composition containing 100 parts by weight of a density polyethylene resin and 50 to 400 parts by weight of a filler is uniaxially stretched 2 to 8 times in the machine direction at a temperature of 50 to 80 ° C., or the film is A method for producing a breathable film, which comprises stretching 1.1 to 8 times in the machine direction at a temperature of 40 to 100 ° C. and further biaxially stretching it to 6 times or less in the transverse direction at a temperature of 70 to 100 ° C.

（４） 常温でのキシレン抽出成分の重量平均分子鎖長
が1000〜9000Åであり、該抽出成分の含量が18〜45重量
％であり、密度が0.870〜0.910g/cm3である線状低密度
ポリエチレン樹脂100重量部と充填剤50〜400重量部およ
び非イオン系界面活性剤0.5〜８重量部を含む樹脂組成
物から成形されたフィルムを50〜80℃の温度で縦方向に
２〜８倍一軸延伸してなる、または該フィルムを40〜10
0℃の温度で縦方向に1.1〜８倍延伸したあと更に70〜10
0℃の温度で横方向に６倍以下に二軸延伸してなる通気
性フィルムの製造方法。(4) A linear low having a weight average molecular chain length of the xylene extract component at room temperature of 1000 to 9000Å, a content of the extract component of 18 to 45% by weight, and a density of 0.870 to 0.910 g / cm 3. A film formed from a resin composition containing 100 parts by weight of a density polyethylene resin, 50 to 400 parts by weight of a filler, and 0.5 to 8 parts by weight of a nonionic surfactant is used in a longitudinal direction of 2 to 8 at a temperature of 50 to 80 ° C. Uniaxially stretched, or the film is 40 to 10
After stretching 1.1 to 8 times in the machine direction at a temperature of 0 ° C, a further 70 to 10
A method for producing a breathable film, which is biaxially stretched 6 times or less in the transverse direction at a temperature of 0 ° C.

本発明で使用される線状低密度ポリエチレン樹脂は、常
温でのキシレン抽出成分の重量平均分子鎖長が1000〜90
00Åであり、該抽出成分の含量が18〜45重量％であり、
密度が0.870〜0.910g/cm3のものである。成分の重量平
均分子鎖長が1000Å未満の場合はフィルム加工性の悪化
やフィルム表面のべとつきなどのため好ましくなく、ま
た、9000Åを越える場合は充填剤の配合割合を増やすこ
とが困難となるので高い通気性を示す通気性フィルムを
得ることができない。CXS成分の含有量が18重量％未満
であると充填剤の配合割合を増やすことが困難となり、
また、45重量％を越えると厚さの均一なフィルムを得る
ことができないので、それぞれ好ましくない。また密度
が0.870g/cm3未満であると得られたフィルムの表面がべ
とついたり強度や耐熱性が低下するので好ましくなく、
0.915g/cm3を越えると充填剤の配合割合を増やすことが
できないので、高い通気性を示す通気性フィルムを得る
ことができない。なお、本発明で使用される線状低密度
ポリエチレン樹脂は、例えば特開昭56−99209号公報、
特開昭59−230011号公報等に記載されているような公知
の方法で製造することができる。The linear low density polyethylene resin used in the present invention has a weight average molecular chain length of the xylene extraction component of 1000 to 90 at room temperature.
00Å, the content of the extracted component is 18 to 45% by weight,
It has a density of 0.870 to 0.910 g / cm 3 . If the weight average molecular chain length of the component is less than 1000Å, it is not preferable because it deteriorates the film processability and stickiness of the film surface.If it exceeds 9000Å, it is difficult to increase the blending ratio of the filler, which is high. A breathable film showing breathability cannot be obtained. When the content of CXS component is less than 18% by weight, it becomes difficult to increase the blending ratio of the filler,
Further, if it exceeds 45% by weight, a film having a uniform thickness cannot be obtained, which is not preferable. Further, if the density is less than 0.870 g / cm 3 , the surface of the obtained film becomes sticky or the strength and heat resistance are deteriorated, which is not preferable.
If it exceeds 0.915 g / cm 3 , the blending ratio of the filler cannot be increased, so that a breathable film having high breathability cannot be obtained. The linear low density polyethylene resin used in the present invention is, for example, JP-A-56-99209.
It can be produced by a known method as described in JP-A-59-230011.

本発明で使用される充填剤として、炭酸カルシウム、炭
酸マグネシウム、炭酸バリウムなどの炭酸塩、硫酸バリ
ウム、硫酸マグネシウム、硫酸カルシウムなどの硫酸
塩、リン酸マグネシウム、リン酸カルシウムなどのリン
酸塩、水酸化マグネシウム、水酸化アルミニウムなどの
水酸化物、アルミナ、シリカ、酸化マグネシウム、酸化
カルシウム、酸化亜鉛、酸化チタンなどの酸化物、塩化
亜鉛、塩化鉄などの塩化物、アルミニウム粉、鉄粉、銅
粉などの金属粉、マイカ、ガラス粉、ゼオライト、シラ
ス、白土、珪藻土、タルク、カーボンブラック、火山灰
などの無機充填剤や、木粉、パルプ粉などのセルロース
系粉末、ナイロン粉末、ポリエステル粉末、ポリカーボ
ネート粉末、ポリプロピレン粉末、ポリ−４−メチルペ
ンテン−１粉末などの合成樹脂系粉末などの有機充填剤
を挙げることができ、これらは単独または組合わせて使
用される。フィルムの通気性、感触・外観などの点から
炭酸カルシウムが特に好ましい。充填剤の平均粒径はフ
ィルムの均一な延伸性、感触・外観などの点から0.1〜2
0μｍが好ましく、特に、0.8〜5.0μｍが好ましい。線
状低密度ポリエチレン樹脂100重量部に対する充填剤の
配合割合は50〜400重量部である。50重量部未満の場合
は通気性が十分でなく、また、400重量部を越える場合
はフィルム成形性が困難になり厚さの均一なフィルムが
得られないばかりか、フィルムの強度も良好でない。As the filler used in the present invention, calcium carbonate, magnesium carbonate, barium carbonate and other carbonates, barium sulfate, magnesium sulfate, calcium sulfate and other sulfates, magnesium phosphate, calcium phosphate and other phosphates, magnesium hydroxide , Hydroxides such as aluminum hydroxide, alumina, silica, oxides such as magnesium oxide, calcium oxide, zinc oxide, titanium oxide, chlorides such as zinc chloride and iron chloride, aluminum powder, iron powder, copper powder, etc. Inorganic fillers such as metal powder, mica, glass powder, zeolite, shirasu, clay, diatomaceous earth, talc, carbon black, volcanic ash, etc., cellulose powder such as wood powder and pulp powder, nylon powder, polyester powder, polycarbonate powder, polypropylene Powder, poly-4-methylpentene-1 powder, etc. Synthetic resin-based powder can include organic fillers such as, which are used alone or in combination. Calcium carbonate is particularly preferable from the viewpoints of breathability, feel and appearance of the film. The average particle size of the filler is 0.1 to 2 from the viewpoint of uniform stretchability of the film, feel and appearance.
0 μm is preferable, and 0.8 to 5.0 μm is particularly preferable. The compounding ratio of the filler to 100 parts by weight of the linear low density polyethylene resin is 50 to 400 parts by weight. If it is less than 50 parts by weight, the air permeability is insufficient, and if it exceeds 400 parts by weight, the film moldability becomes difficult and a film having a uniform thickness cannot be obtained, and the strength of the film is not good.

本発明においては、更に、充填剤の配合割合を増やした
場合における充填剤の均一分散性を向上させ、且つ、優
れた延伸性を維持させるために、非イオン系界面活性剤
が使用される。非イオン系界面活性剤としては炭素数12
〜22個を有する脂肪酸のグリセリンエステル、ソルビタ
ンエステルなどを挙げることができ、特に、モノグリセ
リンモノステアレートやジグリセリンジステアレートを
単独または混合物で用いるのが好ましい。線状低密度ポ
リエチレン樹脂100重量部に対する非イオン系界面活性
剤の配合割合は0.5〜８重量部である。0.5重量部未満の
場合は充填剤の均一分散性が良好でなく、また、８重量
部を越える場合はフィルム中の非イオン系界面活性剤が
フィルムの表面にブリードアウトするなどの問題点が生
じる。In the present invention, a nonionic surfactant is used in order to improve the uniform dispersibility of the filler when the blending ratio of the filler is increased and to maintain the excellent stretchability. 12 carbon atoms as a nonionic surfactant
Examples thereof include glycerin ester and sorbitan ester of fatty acid having 22 to 22, and it is particularly preferable to use monoglycerin monostearate or diglycerin distearate alone or in a mixture. The mixing ratio of the nonionic surfactant to 100 parts by weight of the linear low density polyethylene resin is 0.5 to 8 parts by weight. If it is less than 0.5 part by weight, the uniform dispersibility of the filler is not good, and if it exceeds 8 parts by weight, problems such as bleeding out of the nonionic surfactant in the film on the surface of the film occur. .

本発明の通気性フィルムを製造する方法は次の通りであ
る。まず、線状低密度ポリエチレンと充填剤、場合によ
っては更に非イオン系界面活性剤とを、ロール型または
バンバリー型の混練機あるいは押出機などを用いる通常
の方法で混合あるいは混練して樹脂組成物を得、次いで
この樹脂組成物からインフレーション加工、カレンダー
加工、Ｔダイ加工等の通常のフィルム成形方法によって
フィルムを製造する。The method for producing the breathable film of the present invention is as follows. First, a linear low-density polyethylene and a filler, and optionally a nonionic surfactant, are mixed or kneaded by a conventional method using a roll type or Banbury type kneader or an extruder to prepare a resin composition. Then, a film is produced from this resin composition by a usual film forming method such as inflation processing, calendar processing, T-die processing.

次に、このフィルムを延伸することによってフィルムに
通気性を付与するが、延伸は一軸または二軸で行なわれ
る。Next, the film is stretched to give air permeability to the film, but the stretching is carried out uniaxially or biaxially.

一軸延伸の場合は通常ロール延伸が好ましいが、チュー
ブラー延伸で引取り方向を強調させた延伸等でも可能で
ある。また、延伸は一段でも二段以上でも可能である。
延伸倍率は２〜８倍である。２倍未満の場合は通気性が
非常に低く感触・外観も悪く、また、８倍を越える場合
は厚さの均一なフィルムを得るのが困難であると同時
に、得られた通気性フィルムが熱収縮を起こし易いので
好ましくない。延伸の温度は得られる通気性フィルムの
通気性や感触・外観に影響を及ぼす重要な因子であり、
一般的には、高温で延伸すると感触・外観は良好である
が通気性は高くなく、また、低温で延伸すると通気性は
高いが感触・外観は不良である。しかし、低温で延伸し
た場合に得られる本発明の通気性フィルムは、高い通気
性と良好な感触・外観とを同時に有している。本発明に
おける延伸の温度は、通気性と感触・外観の点から50〜
80℃が好ましく、更に、60〜75℃が好ましい。In the case of uniaxial stretching, roll stretching is usually preferable, but stretching in which the take-up direction is emphasized by tubular stretching is also possible. Further, the stretching can be performed in one stage or in two or more stages.
The draw ratio is 2 to 8 times. If it is less than 2 times, the air permeability is very low and the feel and appearance are poor, and if it exceeds 8 times, it is difficult to obtain a film having a uniform thickness, and at the same time, the obtained breathable film is It is not preferable because it easily contracts. The stretching temperature is an important factor that affects the breathability, feel and appearance of the breathable film obtained,
Generally, when stretched at a high temperature, the feel and appearance are good, but the breathability is not high, and when stretched at a low temperature, the breathability is high but the feel and appearance are poor. However, the breathable film of the present invention obtained when stretched at a low temperature has a high breathability and a good feel and appearance at the same time. The stretching temperature in the present invention is 50 to 50 from the viewpoint of breathability, touch and appearance.
The temperature is preferably 80 ° C, more preferably 60 to 75 ° C.

二軸延伸の場合は40〜100℃で縦方向に1.1〜8.0倍に延
伸したあと、更に、70〜100℃で横方向に6.0倍以下に延
伸する。縦方向の延伸について、40℃未満では延伸直後
にフィルムが収縮を起こして均一なフィルムが得られ
ず、また、100℃を越えると通気性が発現されにくいの
で、それぞれ好ましくない。延伸倍率が1.1倍未満では
通気性が発現されにくく、また、8.0倍を越えると後続
の横方向の延伸によってもフィルムの強度バランスを保
持させることができないので、それぞれ好ましくない。
フィルムの通気性を非常に高めると同時に強度バランス
をも保持させる目的で行われる横方向の延伸について、
70〜100℃の範囲外や6.0倍を越える延伸は成形安定性の
点から好ましくない。低い延伸倍率によって高い通気性
を有するフィルムを得るための二軸延伸の更に好ましい
条件は、50〜85℃で縦方向に1.2〜4.0倍に延伸したあ
と、更に、80〜95℃で横方向に3.0倍以下に延伸するこ
とである。このような二軸延伸によって通気性が非常に
向上するのは、先ず低温で縦方向に延伸することによっ
て生じたミクロボイドが、後続の横方向の延伸において
引張応力が加わった状態で高温にさらされたために拡大
して円状に変形したためであり、また、フィルムの強度
バランスが保持されるのはミクロボイドの形状と樹脂の
配向状態の変化によるものと考えられる。従って、二軸
延伸は縦方向と横方向とを異なる延伸条件で逐次に行う
のが好ましく、二軸延伸を同時に行った場合は満足する
通気性フィルムが得られない。なお、二軸延伸の縦方向
の延伸はロール延伸が好ましく、延伸は一段または二段
以上で行うことができる。また、軸方向の延伸は熱風中
で行うのが好ましい。In the case of biaxial stretching, the film is stretched 1.1 to 8.0 times in the machine direction at 40 to 100 ° C. and then 6.0 times or less in the transverse direction at 70 to 100 ° C. Regarding the stretching in the machine direction, if the temperature is less than 40 ° C., the film shrinks immediately after stretching and a uniform film cannot be obtained, and if it exceeds 100 ° C., air permeability is difficult to be exhibited, which is not preferable. If the stretching ratio is less than 1.1 times, the air permeability is hardly exhibited, and if it exceeds 8.0 times, the strength balance of the film cannot be maintained even by the subsequent stretching in the transverse direction, which is not preferable.
Regarding the stretching in the transverse direction for the purpose of maintaining the balance of strength at the same time as greatly enhancing the breathability of the film,
Stretching outside the range of 70 to 100 ° C. or exceeding 6.0 times is not preferable from the viewpoint of molding stability. More preferable condition of biaxial stretching to obtain a film having high air permeability due to a low stretching ratio is, after stretching 1.2 to 4.0 times in the longitudinal direction at 50 to 85 ° C, further in the transverse direction at 80 to 95 ° C. Stretching to 3.0 times or less. The air permeability is greatly improved by such biaxial stretching because the microvoids generated by stretching in the machine direction at low temperature are exposed to high temperature in the subsequent transverse stretching with tensile stress. Therefore, the film is enlarged and deformed into a circular shape, and it is considered that the strength balance of the film is maintained due to the change in the shape of the microvoids and the orientation state of the resin. Therefore, the biaxial stretching is preferably carried out sequentially in different stretching conditions in the machine direction and the transverse direction, and when biaxial stretching is carried out simultaneously, a satisfactory breathable film cannot be obtained. In addition, the longitudinal stretching of the biaxial stretching is preferably roll stretching, and the stretching can be performed in one stage or in two or more stages. Further, it is preferable to perform the axial stretching in hot air.

延伸して得られたフィルムは、通気性を更に向上させ熱
収縮性を緩和させるために、その後ヒートセットするの
が好ましい。ヒートセットの下限温度は60℃であり、上
限温度はTm（線状低密度ポリエチレンの示差走査熱量計
による最大ピーク温度（Ｃ））より５℃だけ低い温度で
ある。ヒートセットの時間が必要以上に長すぎると通気
性が悪化するので好ましくない。ヒートセットの好まし
い条件はTmより約10℃だけ低い温度で５〜80秒である。The film obtained by stretching is preferably heat set after that in order to further improve air permeability and alleviate heat shrinkability. The lower limit temperature of heat setting is 60 ° C., and the upper limit temperature is 5 ° C. lower than Tm (maximum peak temperature (C) of a linear low density polyethylene measured by a differential scanning calorimeter). It is not preferable that the heat setting time is longer than necessary because the air permeability is deteriorated. Preferred conditions for heat setting are 5 to 80 seconds at a temperature about 10 ° C below Tm.

なお、本発明の通気性フィルムを得るための樹脂組成物
中には、本発明の効果を実質的に損わない範囲で酸化防
止剤、抗ブロッキング剤等を配合させることができる。The resin composition for obtaining the breathable film of the present invention may contain an antioxidant, an anti-blocking agent, etc. within a range that does not substantially impair the effects of the present invention.

＜発明の効果＞ 本発明によれば、特定のポリエチレン樹脂を樹脂成分と
する樹脂組成物を用いることによって、優れたフィルム
成形性およびフィルム延伸性を有し、且つ、高い通気
性、良好な感触・外観および強度を示す通気性フィルム
を得ることができる。<Effects of the Invention> According to the present invention, by using a resin composition containing a specific polyethylene resin as a resin component, it has excellent film moldability and film stretchability, and also has high air permeability and good feel. -A breathable film showing appearance and strength can be obtained.

後述する比較例で示すように、本発明で特定されていな
いポリエチレン樹脂を使用したり、その他の発明の構成
要件を満たさない場合は、本発明の目的とする通気性フ
ィルムを得ることができない。As will be shown in Comparative Examples described later, when a polyethylene resin not specified in the present invention is used or other constituent requirements of the invention are not satisfied, the breathable film aimed at by the present invention cannot be obtained.

これに対して、本発明の実施例では優れた通気性フィル
ムが好都合に得られる。本発明の特定のポリエチレン樹
脂を用いることにより、特に、通常ポリエチレン樹脂で
は困難であるとされている二軸延伸が可能となるので、
低倍率の延伸によって高い通気性を得ることができる。In contrast, the embodiments of the present invention advantageously provide excellent breathable films. By using the specific polyethylene resin of the present invention, in particular, it becomes possible to perform biaxial stretching, which is generally considered to be difficult with polyethylene resin,
High air permeability can be obtained by stretching at a low ratio.

本発明によって得られる通気性フィルムは、その特性を
生かして衣料用、包装用、使い捨ておむつ用、医療用等
に使用することができる。The breathable film obtained by the present invention can be used for clothing, packaging, disposable diapers, medical use, etc. by making the most of its properties.

＜実施例＞ 以下、実施例によって詳細に説明するが、本発明はこれ
によって限定されるものではない。なお、実施例および
比較例に示した物性の測定法は以下の通りである。<Example> Hereinafter, although an Example demonstrates in detail, this invention is not limited to this. The methods for measuring the physical properties shown in Examples and Comparative Examples are as follows.

重量平均分子鎖長:CXS成分の重量平均分子鎖長は、東洋
曹達（株）製のゲル浸透クロマトグラフィー（GPC）811
型にカラムとしてGMH6−HDを２本取り付け、130℃の条
件下でポリスチレンを基準として測定した。Weight average molecular chain length: The weight average molecular chain length of the CXS component is the gel permeation chromatography (GPC) 811 manufactured by Toyo Soda Co., Ltd.
Two GMH6-HDs were attached to the mold as columns, and the measurement was carried out at 130 ° C. with polystyrene as a reference.

密度：樹脂の密度はJIS K6760−1981に準拠して密度勾
配管法により23℃で測定した。Density: The density of the resin was measured at 23 ° C by the density gradient tube method according to JIS K6760-1981.

通気度：フィルムの通気性は、常温でフィルムに空気圧
0.2kg/cm2を加えた場合の１分間の空気透過量を測定し
た。Air permeability: The air permeability of the film is the air pressure on the film at room temperature.
The air permeation amount per minute when 0.2 kg / cm 2 was added was measured.

収縮率：通気性フィルムの熱収縮性は、フィルムを80℃
で60分間処置したときに起こる収縮量（長さ）を処置す
る前の長さに対する百分率（％）で表わしたものであ
り、縦方向（以下、MDと言う）と横方向（以下、TDと言
う）とについて測定した。Shrinkage: The heat-shrinkability of the breathable film is 80 ° C
The amount of contraction (length) that occurs after 60 minutes of treatment is expressed as a percentage (%) relative to the length before treatment, and is expressed in the longitudinal direction (hereinafter referred to as MD) and the lateral direction (hereinafter referred to as TD). Say) and measured.

引裂強度：通気性フィルムの強度はJIS P8116に準拠し
てエルメンドルフ引裂強度をMDとTDとについて測定し
た。Tear strength: The strength of the breathable film was measured according to JIS P8116 by measuring Elmendorf tear strength with respect to MD and TD.

感触・外観：通気性フィルムの感触・外観は触指と目視
によって以下の基準で判定した。Feeling / Appearance: The feeling / appearance of the breathable film was judged by the following criteria by visual inspection with fingers.

◎ 良好な感触であり延伸ムラが全くない。◎ Good touch and no stretching unevenness.

○ 良好な感触であるが延伸ムラが少しある。○ It has a good feel, but has some stretching unevenness.

△ ややゴワゴワした感触であり延伸ムラが少しある。B: It has a slightly stiff feel and has some stretching unevenness.

× かなりゴワゴワした感触であり延伸ムラもかなりあ
る。× It has a very stiff feel and has considerable stretching unevenness.

メルトフローレイト：樹脂のメルトフローレイト（以
下、MFRと言う）はJIS K6760−1981に準拠して測定し
た。Melt flow rate: The melt flow rate (hereinafter referred to as MFR) of the resin was measured according to JIS K6760-1981.

引張強度:JIS Z1702に準拠して破断強度をMDとTDとに
ついて測定した。Tensile strength: Breaking strength was measured for MD and TD in accordance with JIS Z1702.

実施例１ 重量平均分子鎖長が6000ÅであるCXS成分25重量％を含
み、密度が0.904g/cm3であり、MFRが1.9である線状低密
度ポリエチレン樹脂100重量部、平均粒径1.25μｍの炭
酸カルシウム170重量部、およびモノグリセリンモノス
テアレート3.3重量部を森田精機（株）製のタンブラー
ミキサーMT50型によって予め混合した後、神戸製鋼
（株）製のバンバリーBR型により120〜150℃で５分間混
練した。得られた樹脂組成物をモダンマシーナリー
（株）製の50mmφ抽出機EA−50型（ダイロ径100mmφ、
スパイラルダイ）によりインフレーション成形し、厚さ
120μｍのフィルムに製膜した。押出成形の条件はシリ
ンダー温度:170−170−190℃、ヘッドとダイス温度:190
−190℃、ブロー比：約2.0であった。このフィルムを日
本製鋼（株）製のロール延伸機によりMDに65℃で４倍に
一軸延伸して厚さ約35μｍの通気性フィルムを得た。結
果を第１表に示した。得られた通気性フィルムの通気性
と感触・外観は良好であった。Example 1 100 parts by weight of a linear low-density polyethylene resin having a weight average molecular chain length of 25% by weight of a CXS component of 6000Å, a density of 0.904 g / cm 3 , and an MFR of 1.9, and an average particle size of 1.25 μm 170 parts by weight of calcium carbonate and 3.3 parts by weight of monoglycerin monostearate were premixed with a tumbler mixer MT50 type manufactured by Morita Seiki Co., Ltd., and then at 120-150 ° C. by a Banbury BR type manufactured by Kobe Steel, Ltd. Kneading for 5 minutes. The obtained resin composition was manufactured by Modern Machinery Co., Ltd. 50 mmφ extractor EA-50 type (Dilo diameter 100 mmφ,
Inflation molding with a spiral die)
It was formed into a 120 μm film. Extrusion conditions are cylinder temperature: 170-170-190 ℃, head and die temperature: 190
It was −190 ° C. and the blow ratio was about 2.0. This film was uniaxially stretched 4 times in MD at 65 ° C. by a roll stretching machine manufactured by Nippon Steel Co., Ltd. to obtain a breathable film having a thickness of about 35 μm. The results are shown in Table 1. The breathable film obtained had good breathability, feel and appearance.

実施例２ 充填剤として平均粒径0.6μｍの硫酸バリウム210重量
部、および非イオン系界面活性剤としてジグリセリンジ
ステアレート5.0重量部を使用したこと以外は実施例１
と同様にして、通気性フィルムを得た。結果を第１表に
示した。得られた通気性フィルムの通気性と感触・外観
は良好であった。Example 2 Example 1 except that 210 parts by weight of barium sulfate having an average particle size of 0.6 μm was used as the filler and 5.0 parts by weight of diglycerin distearate was used as the nonionic surfactant.
A breathable film was obtained in the same manner as. The results are shown in Table 1. The breathable film obtained had good breathability, feel and appearance.

実施例３ 実施例１で得られた通気性フィルムを95℃で６秒間ヒー
トセットした。このものの結果を第１表に示した。得ら
れた通気性フィルムの通気性は実施例１より飛躍的に向
上し、且つ、収縮率も小さかった。Example 3 The breathable film obtained in Example 1 was heat set at 95 ° C. for 6 seconds. The results of this are shown in Table 1. The air permeability of the obtained air permeable film was dramatically improved as compared with Example 1, and the shrinkage rate was also small.

実施例４ 非イオン系界面活性剤を使用しなかったこと以外は全て
実施例１と同様にして、通気性フィルムを得た。結果を
表１に示した。得られた通気性フィルムの通気性と感触
・外観は良好であった。Example 4 A breathable film was obtained in the same manner as in Example 1 except that the nonionic surfactant was not used. The results are shown in Table 1. The breathable film obtained had good breathability, feel and appearance.

実施例５ 充填剤として日本タルク（株）製のMSタルク200重量部
を使用し、また、非イオン系界面活性剤を使用しなかっ
たこと以外は全て実施例１と同様にして通気性フィルム
を得た。得られた通気性フィルムの通気性と感触・外観
は良好であった。Example 5 A breathable film was prepared in the same manner as in Example 1 except that 200 parts by weight of MS Talc manufactured by Nippon Talc Co., Ltd. was used as a filler and no nonionic surfactant was used. Obtained. The breathable film obtained had good breathability, feel and appearance.

比較例１ 炭酸カルシウムの配合割合を43重量部に変えたこと以外
は全て実施例１と同じにして、厚さ120μｍのフィルム
を延伸して厚さ約35μｍのフィルムを得た。結果を表１
に示した。実施例１と比べて延伸後のフィルムの通気性
は全く無く、収縮率も非常に大きかった。Comparative Example 1 A film having a thickness of about 35 μm was obtained by stretching a film having a thickness of 120 μm in the same manner as in Example 1 except that the mixing ratio of calcium carbonate was changed to 43 parts by weight. The results are shown in Table 1.
It was shown to. As compared with Example 1, the stretched film had no air permeability and the shrinkage rate was very large.

比較例２ ポリエチレン樹脂としてCXS成分５重量％を含み、密度
が0.925g/cm3であり、MFRが1.5である線状低密度ポリエ
チレンを使用したこと以外は実施例４と同様にして通気
性フィルムを得た。結果を第１表に示した。熱収縮性は
良好であるものの実施例４と比べて感触・外観の非常に
悪い通気性フィルムであった。Comparative Example 2 A breathable film was prepared in the same manner as in Example 4 except that a linear low density polyethylene containing 5% by weight of CXS component as a polyethylene resin, having a density of 0.925 g / cm 3 and an MFR of 1.5 was used. Got The results are shown in Table 1. Although it had good heat shrinkability, it was a breathable film having a very poor feel and appearance compared to Example 4.

比較例３ 一軸ロールによるMDの延伸を113℃で1.5倍の条件で実施
したこと以外は全て実施例４と同様にして通気性フィル
ムを得た。結果を第１表に示した。実施例４と比べて、
得られた通気性フィルムは通気性が殆んどなく、感触・
外観も不良であった。Comparative Example 3 A breathable film was obtained in the same manner as in Example 4 except that MD stretching with a uniaxial roll was performed at 113 ° C. under a condition of 1.5 times. The results are shown in Table 1. Compared to Example 4,
The resulting breathable film has almost no breathability and feels
The appearance was also poor.

比較例４ 炭酸カルシウムの配合割合を153重量部としたこと以外
は実施例１と同じにして樹脂組成物を得た。この樹脂組
成物を実施例１と同様のインフレーション加工法によっ
て厚さ60μｍのフィルムに成形し、得られたフィルムを
MDに65℃で1.5倍に一軸ロール延伸して厚さ約40μｍの
通気性フィルムを得た。結果を第１表に示した。実施例
１と比べて得られた延伸フィルムは通気性がなく、感触
・外観も不良であった。Comparative Example 4 A resin composition was obtained in the same manner as in Example 1 except that the mixing ratio of calcium carbonate was 153 parts by weight. This resin composition was molded into a film having a thickness of 60 μm by the same inflation processing method as in Example 1, and the obtained film was
Uniaxial roll stretching was performed 1.5 times on MD at 65 ° C. to obtain a breathable film having a thickness of about 40 μm. The results are shown in Table 1. The stretched film obtained in comparison with Example 1 had no breathability, and the feel and appearance were also poor.

比較例５ 炭酸カルシウムの配合割合を450重量部としたこと以外
は実施例１と同じにして得られた樹脂組成物からフィル
ムを形成することを試みたが、充填剤の量が多すぎたた
めにフィルムを得ることができなかった。Comparative Example 5 An attempt was made to form a film from the resin composition obtained in the same manner as in Example 1 except that the mixing ratio of calcium carbonate was 450 parts by weight, but the amount of the filler was too large. I couldn't get a film.

実施例６ 実施例１と同様にして得たインフレーション成形による
厚さ60μｍのフィルムを、MDに65℃で5.0倍に延伸して
厚さ22μｍの通気性フィルムを得た。結果を第１表に示
した。Example 6 A film having a thickness of 60 μm obtained by inflation molding in the same manner as in Example 1 was stretched 5.0 times at MD at 65 ° C. to obtain a breathable film having a thickness of 22 μm. The results are shown in Table 1.

実施例７ 実施例１と同様にして得たインフレーション成形による
厚さ60μｍのフィルムをMDに65℃で1.5倍に一軸ロール
延伸した後、TDに90℃の熱風中で1.5倍に延伸して通気
性フィルムを得た。結果を第１表に示した。得られた通
気性フィルムの通気性と感触・外観は良好でバランスの
とれた強度を持っていた。Example 7 A film having a thickness of 60 μm obtained by inflation molding and obtained in the same manner as in Example 1 was uniaxially stretched 1.5 times at 65 ° C. in MD, and then stretched 1.5 times in hot air at 90 ° C. in TD to be aerated. To obtain a film. The results are shown in Table 1. The breathable film obtained had good breathability, feel and appearance, and had well-balanced strength.

実施例８〜11 MD及びTDの延伸の温度と倍率とを第１表に示した条件に
したこと以外は実施例７と同様にして通気性フィルムを
得た。結果を第１表に示した。得られた通気性フィルム
の通気性と感触・外観は良好でバランスのとれた強度を
持っていた。Examples 8 to 11 Air permeable films were obtained in the same manner as in Example 7 except that the stretching temperature and the stretching ratio of MD and TD were set to the conditions shown in Table 1. The results are shown in Table 1. The breathable film obtained had good breathability, feel and appearance, and had well-balanced strength.

実施例12〜13 非イオン系界面活性剤の添加量を第１表に示した処方に
したこと以外は実施例７と同様にして通気性フィルムを
得た。結果を第１表に示した。得られた通気性フィルム
の通気性と感触・外観は良好で、バランスのとれた強度
を持っていた。Examples 12 to 13 Breathable films were obtained in the same manner as in Example 7 except that the amount of the nonionic surfactant added was changed to the formulation shown in Table 1. The results are shown in Table 1. The breathable film obtained had good breathability, feel and appearance, and had well-balanced strength.

比較例６ 炭酸カルシウムの配合割合を43重量部に変えたこと以外
は実施例７と同様にしてインフレーション成形し、厚さ
120μｍのフィルムに製膜した。得られたフィルムをMD
に75℃で４倍に一軸ロール延伸した後、TDに90℃の熱風
中で1.25倍に延伸して厚さ約35μｍの延伸フィルムを得
た。結果を第１表に示したが、このフィルムは通気性を
全く示さなかった。Comparative Example 6 Inflation molding was performed in the same manner as in Example 7 except that the mixing ratio of calcium carbonate was changed to 43 parts by weight, and the thickness was adjusted.
It was formed into a 120 μm film. MD of the obtained film
Then, it was uniaxially stretched 4 times at 75 ° C., and then stretched 1.25 times at 90 ° C. in hot air to obtain a stretched film having a thickness of about 35 μm. The results are shown in Table 1, but the film did not show any breathability.

比較例７ 実施例７で得たインフレーション成形による厚さ60μｍ
のフィルムを、MDに65℃で1.5倍に延伸した後、TDに105
℃で1.25倍の延伸を試みたが、フィルム切れを起こして
通気性フィルムを得ることができなかった。Comparative Example 7 Thickness obtained by inflation molding obtained in Example 7 60 μm
After stretching the film in MD to 1.5 times at 65 ℃, 105 in TD
An attempt was made to stretch the film at 1.25 times at ℃, but the film was broken and a breathable film could not be obtained.

比較例８ ポリエチレン樹脂として密度が0.925g/cm3でありMFRが
1.5である高圧法ポリエチレン樹脂を使用したこと以外
は実施例７と同じにして、インフレーション成形により
厚さ60μｍのフィルムに製膜した。このフィルムをMDに
95℃で1.5倍に延伸した後、TDに110℃で1.25倍の延伸を
試みたが、フィルム切れを起こして通気性フィルムを得
ることができなかった。Comparative Example 8 As polyethylene resin, the density is 0.925 g / cm 3 and the MFR is
A film having a thickness of 60 μm was formed by inflation molding in the same manner as in Example 7 except that the high-pressure polyethylene resin of 1.5 was used. This film in MD
After stretching 1.5 times at 95 ° C, an attempt was made to stretch TD at 1.25 times at 110 ° C, but film breakage occurred and a breathable film could not be obtained.

比較例９ 非イオン系界面活性剤としてモノグリセリンモノステア
レート9.0重量部を使用したこと以外は全て実施例７と
同様にして通気性フィルムを得た。結果を第１表に示し
た。得られた通気性フィルムは通気性が高くバランスの
とれた強度となっているが、モノグリセリンモノステア
レートが表面にブリードしてフィルムとしての商品価値
はなかった。Comparative Example 9 A breathable film was obtained in the same manner as in Example 7, except that 9.0 parts by weight of monoglycerin monostearate was used as the nonionic surfactant. The results are shown in Table 1. The air-permeable film obtained had a high air-permeability and a well-balanced strength, but monoglycerin monostearate bleeded to the surface, and was not commercial value as a film.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 久米 孝典 大阪府高槻市塚原２丁目10番１号 住友化 学工業株式会社内 (56)参考文献 特開 昭60−6440（ＪＰ，Ａ) 阿部 嘉長、須藤 真編「新版・プラス チック配合剤−基礎と応用」大成社（昭和 59年１月30日）第288頁 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takanori Kume 2-10-1 Tsukahara, Takatsuki City, Osaka Prefecture Sumitomo Kagaku Kogyo Co., Ltd. (56) Reference JP 60-6440 (JP, A) Yoshi Abe Chief, Shin Sudo, "New Edition Plastic Compounds-Basics and Applications" Taiseisha (January 30, 1984) Page 288

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】常温でのキシレン抽出成分の重量平均分子
鎖長が1000〜9000Åであり、該抽出成分の含量が18〜45
重量％であり、密度が0.870〜0.910g/cm3である線状低
密度ポリエチレン樹脂100重量部と充填剤50〜400重量部
とを含む樹脂組成物からなる通気性フィルム。1. The weight average molecular chain length of the xylene extraction component at room temperature is 1000 to 9000Å, and the content of the extraction component is 18 to 45.
A breathable film comprising a resin composition containing 100 parts by weight of a linear low-density polyethylene resin having a weight% of 0.870 to 0.910 g / cm 3 and 50 to 400 parts by weight of a filler. 【請求項２】常温でのキシレン抽出成分の重量平均分子
鎖長が1000〜9000Åであり、該抽出成分の含量が18〜45
重量％であり、密度が0.870〜0.910g/cm3である線状低
密度ポリエチレン樹脂100重量部と充填剤50〜400重量部
および非イオン系界面活性剤0.5〜８重量部を含む樹脂
組成物からなる通気性フィルム。2. The weight average molecular chain length of the xylene extract component at room temperature is 1000 to 9000Å, and the content of the extract component is 18 to 45.
% Resin composition containing 100 parts by weight of a linear low-density polyethylene resin having a density of 0.870 to 0.910 g / cm 3 , 50 to 400 parts by weight of a filler, and 0.5 to 8 parts by weight of a nonionic surfactant. Breathable film consisting of. 【請求項３】常温でのキシレン抽出成分の重量平均分子
鎖長が1000〜9000Åであり、該抽出成分の含量が18〜45
重量％であり、密度が0.870〜0.910g/cm3である線状低
密度ポリエチレン樹脂100重量部と充填剤50〜400重量部
とを含む樹脂組成物から成形されたフィルムを50〜80℃
の温度で縦方向に２〜８倍一軸延伸してなる、または該
フィルムを40〜100℃の温度で縦方向に1.1〜８倍延伸し
たあと更に70〜100℃の温度で横方向に６倍以下に二軸
延伸してなる通気性フィルムの製造方法。3. The weight average molecular chain length of the xylene extraction component at room temperature is 1000 to 9000Å, and the content of the extraction component is 18 to 45.
% By weight and a density of 0.870 to 0.910 g / cm 3 A film formed from a resin composition containing 100 parts by weight of a linear low density polyethylene resin and 50 to 400 parts by weight of a filler at 50 to 80 ° C.
2 to 8 times uniaxially stretched in the machine direction at a temperature of 1, or 1.1 to 8 times in the machine direction at a temperature of 40 to 100 ° C, and then 6 times in the transverse direction at a temperature of 70 to 100 ° C. A method for producing a breathable film obtained by biaxially stretching below. 【請求項４】常温でのキシレン抽出成分の重量平均分子
鎖長が1000〜9000Åであり、該抽出成分の含量が18〜45
重量％であり、密度が0.870〜0.910g/cm3である線状低
密度ポリエチレン樹脂100重量部と充填剤50〜400重量部
および非イオン系界面活性剤0.5〜８重量部を含む樹脂
組成物から成形されたフィルムを50〜80℃の温度で縦方
向に２〜８倍一軸延伸してなる、または該フィルムを40
〜100℃の温度で縦方向に1.1〜８倍延伸したあと更に70
〜100℃の温度で横方向に６倍以下に二軸延伸してなる
通気性フィルムの製造方法。4. The weight average molecular chain length of the xylene extraction component at room temperature is 1000-9000Å, and the content of the extraction component is 18-45.
% Resin composition containing 100 parts by weight of a linear low-density polyethylene resin having a density of 0.870 to 0.910 g / cm 3 , 50 to 400 parts by weight of a filler, and 0.5 to 8 parts by weight of a nonionic surfactant. A film formed from the above is uniaxially stretched 2 to 8 times in the machine direction at a temperature of 50 to 80 ° C., or the film is 40
After stretching 1.1 to 8 times in the machine direction at a temperature of ~ 100 ℃, 70 more
A method for producing a breathable film, which is biaxially stretched 6 times or less in the transverse direction at a temperature of -100 ° C.
JP62123187A 1986-07-16 1987-05-19 Breathable film and manufacturing method thereof Expired - Fee Related JPH06104733B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE8787306309T DE3779199D1 (en) 1986-07-16 1987-07-16 BREATHABLE FILM AND METHOD FOR PRODUCING THE SAME.
KR1019870007732A KR950002889B1 (en) 1986-07-16 1987-07-16 Breathable film and process for production the same
US07/074,118 US4829096A (en) 1986-07-16 1987-07-16 Breathable film and process for production of the same
EP87306309A EP0253667B1 (en) 1986-07-16 1987-07-16 Breathable film and process for production of the same
CN87104852A CN1014794B (en) 1986-07-16 1987-07-16 Breathable film and process for production of the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61-167517 1986-07-16
JP16751786 1986-07-16

Publications (2)

Publication Number Publication Date
JPS63139925A JPS63139925A (en) 1988-06-11
JPH06104733B2 true JPH06104733B2 (en) 1994-12-21

Family

ID=15851155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62123187A Expired - Fee Related JPH06104733B2 (en) 1986-07-16 1987-05-19 Breathable film and manufacturing method thereof

Country Status (2)

Country Link
JP (1) JPH06104733B2 (en)
KR (1) KR950002889B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013129759A1 (en) * 2012-02-27 2013-09-06 주식회사 대명화학 Dustproof film

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2576646B2 (en) * 1988-11-24 1997-01-29 住友化学工業株式会社 Oxygen absorbing sheet
JPH1190981A (en) * 1997-09-18 1999-04-06 Sumitomo Chem Co Ltd Manufacture of inflation film and the film
JP5070660B2 (en) * 2000-10-30 2012-11-14 住友化学株式会社 Porous film, battery separator and battery
JP2002308345A (en) * 2001-04-12 2002-10-23 Mitsubishi Gas Chem Co Inc Anti-liquid de-oxidant packaging member

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606440A (en) * 1983-06-23 1985-01-14 Mitsubishi Petrochem Co Ltd Manufacture of gas-permeable film

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
阿部嘉長、須藤真編「新版・プラスチック配合剤−基礎と応用」大成社（昭和５９年１月３０日）第２８８頁

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013129759A1 (en) * 2012-02-27 2013-09-06 주식회사 대명화학 Dustproof film
CN103289161A (en) * 2012-02-27 2013-09-11 (株)大明化学 Dustproof film

Also Published As

Publication number Publication date
KR880001748A (en) 1988-04-26
JPS63139925A (en) 1988-06-11
KR950002889B1 (en) 1995-03-28

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