JPS62132943A - Production of porous permeable ultrahigh-molecular weight polyolefin film - Google Patents
Production of porous permeable ultrahigh-molecular weight polyolefin filmInfo
- Publication number
- JPS62132943A JPS62132943A JP27423185A JP27423185A JPS62132943A JP S62132943 A JPS62132943 A JP S62132943A JP 27423185 A JP27423185 A JP 27423185A JP 27423185 A JP27423185 A JP 27423185A JP S62132943 A JPS62132943 A JP S62132943A
- Authority
- JP
- Japan
- Prior art keywords
- film
- molecular weight
- stretching
- weight polyolefin
- ultra
- 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.)
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Links
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は超高分子量ポリオレフィン多孔化透過性フィル
ムに関するもので、特にそのうち透過性の高いフィルム
の展進方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a porous and permeable ultra-high molecular weight polyolefin film, and more particularly to a method for developing a highly permeable film.
ポリオレフィンの多孔化フィルムの製造方法の代表的な
ものとして、特開昭、！ｌ−、！！−−４０！１３りで
はポリオレフィンとパラフィンワックスの混合物を押出
し、シート又はフィルムを得、パラフィンワックスを抽
出して多孔化フィルムを得る方法が示されているが１通
常のポリオレフィンを使用しているため、成形性の点か
ら加える事の出来るパラフィンワックスの量が限定され
ているため、その結果として、高透過量のものは得られ
ずしかも強度が弱込という欠点を有している。As a representative method for producing porous polyolefin films, JP-A-Sho,! l-,! ! --40!13 shows a method of extruding a mixture of polyolefin and paraffin wax to obtain a sheet or film, and extracting the paraffin wax to obtain a porous film, but 1 Because ordinary polyolefin is used, However, since the amount of paraffin wax that can be added is limited from the viewpoint of moldability, as a result, it is not possible to obtain a product with a high permeation amount, and the strength is weakened.
本発明は上述した様な方法の持つ問題を解決するもので
あｊｌ）、 ＃に高透過蓋を有し、強度の強いポリオレ
フィン多孔化透過性フィルムを工業的な生産速度、経済
性をもって提供する方法に関するものである。又本発明
の要旨は、超高分子量ポリオレフィンと特定の炭化水素
系可塑剤を混合したものを押出機を用い、フィルム、シ
ート中空状の成形物を得た後、可塑剤の抽出時期と延伸
条件とを適切に組合せて％ユ軸延伸を実施し、上記した
様な超高分子量ポリオレフィン多孔化透過性フィルムを
提供する事である。The present invention solves the problems of the above-mentioned methods, and provides a strong polyolefin porous permeable film with a highly permeable lid at industrial production speed and economy. It is about the method. The gist of the present invention is to obtain a film or sheet hollow molded product using an extruder using a mixture of an ultra-high molecular weight polyolefin and a specific hydrocarbon plasticizer, and then to adjust the timing of extracting the plasticizer and the stretching conditions. % U-axis stretching is carried out in an appropriate combination with the above-mentioned ultra-high molecular weight polyolefin porous and permeable film.
本発明で述べる多孔化透過性フイ、ルムは、各種透湿性
フィルム、ミクロフィルターｅｔｇ各穏フィルターへの
応用が期待されるが、この場合特に高透過量であること
が必須条件となシ、これをＮ、ガスの透過率ＰＭ、で示
すと少くともコｘｉｏ−’（ｍ１０ｃｍ ）以上は
必要である。The porous permeable films and lumes described in the present invention are expected to be applied to various moisture permeable films, microfilters, etc., but in this case, particularly high permeability is an essential condition. When expressed in terms of N and gas permeability PM, it is necessary to have a gas permeability of at least xio-' (m10cm2) or more.
−韮τテＥ；ｉｒ−
又更にフィルムの厚さが薄い具体的には、 １００μ
以下である必要がある。本発明に用いる超高分子量ポリ
オレフィンと可塑剤の混合物の溶融体は流動の安定性８
ｔＱＯ問題から工業的に高速成形する場合は得られるフ
ィルム、シート、中空状の成形物の厚さは数１００μが
限界であシ。- 鮮τTEE;ir- Moreover, the thickness of the film is specifically, 100μ
Must be below. The melt of the mixture of ultra-high molecular weight polyolefin and plasticizer used in the present invention has a flow stability of 8.
Due to the tQO problem, when industrially high-speed molding is performed, the thickness of the obtained film, sheet, or hollow molded product is limited to several 100 μm.
この成形物を延伸して薄肉化する必要がある。It is necessary to stretch this molded product to make it thinner.
更にこの延伸によシフイルム強度も大きくなる利点があ
る。Furthermore, this stretching has the advantage of increasing the strength of the film.
次に５本発明の具体的な方法について説明する。Next, five specific methods of the present invention will be explained.
基材として使用する超高分子量ポリオレフィントシてｌ
−１，１３！ｒ’ｃデカリン中での極限粘度〔η〕がｓ
４１７１１以上のポリエチレン、ポリプルピレンが適
している。これ以下では分子量が低すぎて、可塑剤（ロ
）と混合された溶融物の粘度が低くすぎて押出機でのシ
ート、フィルム中空体の成形が困難となる。Ultra-high molecular weight polyolefin used as base material
-1,13! The intrinsic viscosity [η] in r'c decalin is s
Polyethylene of 41711 or higher and polypropylene are suitable. Below this range, the molecular weight is too low and the viscosity of the melt mixed with the plasticizer (b) is too low, making it difficult to mold sheets and film hollow bodies using an extruder.
次に炭化水素系の可塑剤（ロ）としては常温で液体であ
ると特に可塑剤の比率を多くした場合超高分子量ポリオ
レフィンと単に機械ブレンドして押出機に供給しても敵
状のためスクリューの供給部において、すべ〕が発生し
押出し成形が−にならない等の欠点があ）、工業的な生
産には適せず、’Ｉａ温固体であるパラフィンワックス
、あるいはステアリルアルコール、セリルアルコールｅ
ｔｃの高級脂肪族アルコールが適している。Next, as for the hydrocarbon plasticizer (b), if it is liquid at room temperature, especially if the ratio of plasticizer is increased, even if it is simply mechanically blended with ultra-high molecular weight polyolefin and fed to the extruder, the screw It is not suitable for industrial production, and is not suitable for industrial production.
tc higher aliphatic alcohols are suitable.
特ニスｆ７１）ルアルコール、セリルアルコール８ｔＱ
の常温固形である高級脂肪族アルコールは細かか粒子を
得る事が出来、粉末の超高分子量ポリオレフィンとの機
械的なトライブレンドが非常に均一にな〕易く、このま
ま押出機の供給部に供給すれば安定した押出し成形が可
能であシ、工業生産に非常に適している。更に脂肪族ア
ルコールは水酸基を有しているため、パラフィンワック
スに比較し、若干ポリオレフィンとの相溶性が悪く、冷
却固化時に相分離を起しやすく、との相分離のし易さを
コントロールする事によ）、多孔性透過フィルムの孔の
径を大きくして透過量を増大させる等の利点を有してい
る。超高分子量ポリオレフィン（６）と可塑剤（ロ）と
の混合割合は、（６）、１−−６０重量％、の）ダＯ〜
ｔＳ％が適当である。（４）成分がこれよ）多すぎると
、第１に押出機による混合物の溶融体の押出し成形が出
来なくなること、第一に（ロ）成分を抽出しても、空孔
率が上がらず目的とする高透過量を有するフィルムを得
る事が出来ない。Special varnish f71) alcohol, ceryl alcohol 8tQ
Higher aliphatic alcohols, which are solid at room temperature, can be obtained in fine particles, and mechanical tri-blending with powdered ultra-high molecular weight polyolefins is very easy to achieve, so they can be fed as they are to the feed section of the extruder. Stable extrusion molding is possible, making it very suitable for industrial production. Furthermore, since aliphatic alcohols have hydroxyl groups, they are slightly less compatible with polyolefins than paraffin wax, and are more likely to cause phase separation during cooling and solidification. ), it has the advantage of increasing the permeation amount by increasing the diameter of the pores of the porous permeable film. The mixing ratio of the ultra-high molecular weight polyolefin (6) and the plasticizer (b) is (6), 1--60% by weight,
tS% is appropriate. (4) If there are too many components, firstly, it will not be possible to extrude the molten mixture using an extruder, and secondly, even if components (b) are extracted, the porosity will not increase and the desired purpose It is not possible to obtain a film with a high transmittance.
又、これよシ成分（４）が少なすぎると、混合物の溶融
粘度が低すぎ、フィルム、シート中空体の成形が困難と
なる。シート、フィルム及び中空状の成形体（０）は（
６）と（ロ）の混合をヘンシュルミキサ−１■−プレン
ダ−〇ｔＱで実施後、この混合物を押出機に供給し、Ｔ
ダイ又は円筒ダイによシ成形する事により得る。この様
にして得た成形体（ｑに対し、ｌ軸延伸と可塑剤（ロ）
の抽出除去、ニ
のメ程を組み合わせて多孔化透過性フィルムを得るわけ
であるが、目的とする高透過のフィルムを得るためには
、次に示す条件を適切に組合わせる必要があるう
■ どの段階で可塑剤（ロ）を抽出除去するか■ 延伸
方法〜ｌｌ軸延伸ココ軸延伸同次、逐次）■ 延伸速度
■ 延伸温度
■ 延伸倍率
このうち■の延伸速度は小さいほど高透過量を示すが、
工業生産を前提とする以上、小さくすることは不適当で
ある。On the other hand, if the amount of component (4) is too small, the melt viscosity of the mixture will be too low, making it difficult to form a hollow film or sheet. Sheets, films, and hollow shaped bodies (0) are (
After mixing 6) and (b) in a Henschl mixer 1 - blender 〇tQ, this mixture was fed to an extruder and
Obtained by molding with a die or cylindrical die. The molded product obtained in this way (l-axis stretching and plasticizer (b) for q)
A porous, permeable film is obtained by combining extraction and removal of the above two steps, but in order to obtain the desired highly permeable film, it is necessary to appropriately combine the following conditions. At what stage should the plasticizer (b) be extracted and removed? ■ Stretching method ~ ll-axis stretching, co-axis stretching, sequential, sequential) ■ Stretching speed ■ Stretching temperature ■ Stretching ratio Among these, the lower the stretching speed, the higher the amount of permeation. As shown,
As long as industrial production is assumed, it is inappropriate to make it smaller.
以下目的とする高透過量フィルムを得る為の概して述べ
ると％ ｌ軸延伸ぜどの条件でも非常に透過量が低下す
る事、更にフィルムが裂は易くなり不適当である。又、
ｌ軸延伸においても、超高分子量ポリオレフィンになる
べく応力をかけない条件を選ぶ必要がある。Generally speaking, in order to obtain the desired high permeation film, the permeation amount is extremely reduced under the conditions of %l axial stretching, and furthermore, the film tends to tear, which is unsuitable. or,
Even in l-axis stretching, it is necessary to select conditions that do not apply stress to the ultra-high molecular weight polyolefin as much as possible.
可塑７￥１１の）の抽出除去は■）成分可溶な溶媒−で
実施する事が出来るが、たとえばパラフィンワックスの
場合は、ヘキサン８ｔＱでステアリルアルコールｅｔｃ
の高級脂肪族アルコールの場合は、メタノール、エタノ
ール、ブタノールθｔＣで簡単に実施する事が出来る。Extractive removal of plasticity 7￥11) can be carried out using ■) a solvent that is soluble in the component, but for example, in the case of paraffin wax, hexane 8tQ is used to remove stearyl alcohol, etc.
In the case of higher aliphatic alcohols, it can be easily carried out using methanol, ethanol, or butanol θtC.
この抽出除去はｌ軸延伸の前、又は後、更には、第１段
目で縦方向へ延伸した後抽出除去し、更に第一段目で横
方向へ延伸する方法がある。This extraction and removal may be carried out before or after the l-axis stretching, or furthermore, there is a method in which extraction and removal is performed after stretching in the longitudinal direction in the first stage, and then in the transverse direction in the first stage.
以降それぞれを抽出前延伸、抽出後延伸、中間抽出延伸
と呼ぶ。抽出前延伸は他のλつに対して延伸倍率、温度
の影響を受は易く１条件の選定に留意する要がある。縦
延伸倍率をλ３．横延伸倍率をλ２とすると、λ、〉１
．Ｓｌ λ、）／、３及びλ１×λ２く９という条件を
満足する必要がある。Hereinafter, each will be referred to as pre-extraction stretching, post-extraction stretching, and intermediate extraction stretching. Pre-extraction stretching is more easily affected by the stretching ratio and temperature than the other λ factors, so care must be taken when selecting one condition. The longitudinal stretching ratio was set to λ3. When the horizontal stretching ratio is λ2, λ,〉1
．． It is necessary to satisfy the following conditions: Sl λ, )/, 3 and λ1×λ2×9.
λ１×λ、がｔを超えると、透過量が大きく低下するた
めである。更にλ１１λ、を１．５倍以上とするのは、
前述した成形体（ｑをＴダイ、円筒ダイにフィン分子が
配向する為、／、７倍以上の延伸を両方向く与える事が
、フィルム強度透過量を大きくする観点から必要である
からである。This is because when λ1×λ exceeds t, the amount of transmission decreases significantly. Furthermore, increasing λ11λ by 1.5 times or more is as follows:
This is because the above-mentioned molded product (q is the T die and the fin molecules are oriented in the cylindrical die, so it is necessary to apply a stretching of 7 times or more in both directions from the viewpoint of increasing the film strength transmission amount.
延伸温度は、超高分子量ポリオレフィンの融点’ｒｍ以
下？！１１−／Ｑ℃以上の温度が適当である。Is the stretching temperature below the melting point of ultra-high molecular weight polyolefin 'rm? ! Temperatures above 11-/Q°C are suitable.
Ｔｍ以上では工業的に安定した延伸を実現する比較し、
延伸による透過量の低下が低くよシ好ましい。又、工業
的にも適した方法である。Compared to achieving industrially stable stretching at Tm or higher,
It is preferable because the amount of permeation decreases little due to stretching. It is also an industrially suitable method.
次に抽出後延伸、中間抽出延伸法では、上記の抽出前延
伸よシも条件の選定はゆるやかになる。すなわち延伸倍
率はλ＊ ＞ ／ａｊ ｂ λ、）／、ｊ、λ、×八く
コＯを満すこと、延伸温度は超高分子量ポリオレフィン
に）の融点Ｔｍ以下である事である。Next, in the post-extraction stretching method and the intermediate extraction stretching method, the selection of conditions is more relaxed than in the above-mentioned pre-extraction stretching method. That is, the stretching ratio must satisfy λ* > /aj b λ,)/, j, λ, x 80, and the stretching temperature must be below the melting point Tm of the ultra-high molecular weight polyolefin.
以上上述した本発明の方法によ〕、高透過性であル、シ
かも強度的にも優れた超高分子量ボリオレフイン多孔化
透過性フィルムを得る事が出来る様になつ九。このフィ
ルムは透湿性フィルムへの適用、又０．０ ／〜０．３
μ程度の微粒子の除去性も良好なことから各種ミクロフ
ィルターへの適用が出来る。By the method of the present invention as described above, it becomes possible to obtain a porous, permeable ultra-high molecular weight polyolefin film which is highly permeable and has excellent properties in terms of thickness, strength and strength. This film can be applied to moisture permeable film and also has 0.0/~0.3
Since it has good ability to remove micro-sized particles, it can be applied to various microfilters.
次に本発明を実施例をあげて更に詳細に説明するが５本
発明は、その要旨を越えない限）。Next, the present invention will be described in more detail with reference to Examples, but the scope of the present invention will not exceed its gist.
以下の実施例によって限定されるものではない。The following examples are not intended to be limiting.
本発明の明細書および実施例に示される諸物性は、次の
方法に従って測定した。The various physical properties shown in the specification and examples of the present invention were measured according to the following methods.
ゴ１１３
ＯＮ、ガス透過係数（ｓｏｏ、Ｃｌ７ｔ、ｃＷ、Ｈ，）
アミコン社ｆｉ ＵＩＦ攪拌攪拌セルｌ上型セル用し、
差圧ｉｋｇ／ａ１１．温度コ！℃にて測定０空孔率ＣＭ
） ： （！２！孔容積／多孔化フィルム容積）ｘｉｏ
。Go113 ON, gas permeability coefficient (soo, Cl7t, cW, H,)
Amicon company fi UIF stirring stirring cell l for upper type cell,
Differential pressure ikg/a11. Temperature! 0 porosity CM measured at °C
): (!2! Pore volume/porous film volume) xio
.
実施例−１〜コ 比較例１−ダ
極限粘度（ｖｌ ＝ ／ ｓ、ｓ融点ＩＪ！ｒ”ｃの超
高分子量ポリエチレンパウダー−〇重量ｘとステアリル
アルコール微粒子１０重量％をトライブレンド後、供給
部を水冷ジャケットで冷却したダＯ■押出機に供給この
先端に更にＪＯｍ押出機を付設し、上記ブレンド物を、
均一な溶融体にし、巾コＯｃｍのＴ−ダイよシ押出し０
．ｒ ａｍのシートを得た。Examples 1 to 5 Comparative Example 1 Ultra-high molecular weight polyethylene powder with intrinsic viscosity (vl = /s, s melting point IJ! A JOm extruder is further attached to the tip of this extruder, which is cooled with a water-cooled jacket.
Make the melt uniform and extrude it through a T-die with a width of 0 cm.
．． A sheet of ram was obtained.
このシートをユ軸延伸機を用いて各糧条件で延伸した後
ステアリルアルコールを３０℃エタノールで抽出除去す
る事によシ各種の多孔化透過性フィルムを得た。この結
果を表−１に示す。This sheet was stretched using a U-axis stretching machine under various conditions, and then the stearyl alcohol was extracted and removed with 30° C. ethanol to obtain various porous and permeable films. The results are shown in Table-1.
実施例３〜り 比較例３〜り
実施例−）と同様にして得た０、ｊ ｍのシートからス
テアリルアルコールを、５０℃エタノールで抽出除去し
た後二軸延伸機で種々の延伸条件で延伸して樵々の多孔
性透過フィルムを得た。Example 3 - Comparative Example 3 - Comparative Example 3 - Stearyl alcohol was extracted and removed from a 0, j m sheet obtained in the same manner as in Example -) with 50°C ethanol, and then stretched under various stretching conditions using a biaxial stretching machine. A porous transparent film of woodcutter was obtained.
この結果を表−一に示す。The results are shown in Table 1.
実施例−を
実施例−１と同様にして得たｏ、ｒ■のシートを／、３
０℃で縦方向にダ倍延伸した後３０℃エタノールでステ
アリルアルコールを抽出除去し更に横方向にｌ−０℃で
ｔ倍延伸し友。得られを示し友。Example - The o, r sheet obtained in the same manner as Example -1 was /, 3
After stretching the film in the machine direction at 0°C by a factor of 1, the stearyl alcohol was extracted and removed with ethanol at 30°C, and the film was further stretched in the transverse direction by a factor of 1 at 1-0°C. Show your friends what you got.
実施例９〜ｌ／
超高分子量ポリオレフィンＱ１可塑剤＠）の種類囚、＠
の混合比を種々かえて、実施例Ｊと同様に抽出後逐次延
伸を実施して多孔化透過性フィルムを得たその結果を表
−３に示す。Examples 9-1/ Types of ultra-high molecular weight polyolefin Q1 plasticizer @), @
Porous permeable films were obtained by successive stretching after extraction in the same manner as in Example J, with various mixing ratios. Table 3 shows the results.
実施例−ｌコ
実施例−３で得られた透過性フィルムについて粒子径０
．ＯＪ ｆｆμのスチレンラテックスを水に分散させて
、その除去率を測定したところ９９９６以上の値を示し
た。Example-I Regarding the transparent film obtained in Example-3, the particle size was 0.
．． When the styrene latex of OJ ffμ was dispersed in water and the removal rate was measured, it showed a value of 9996 or more.
手 続 補 正 書
／ 事件の表示 昭和≦０年／り月！日に提出の特許
願超高分子量ポリオレフィン多孔化透過性フィルムの製
造方法
３ 補正をする者
出願人 （ｊ９４）三菱化成工業株式会社り代理人〒１
００
東京都千代田区丸の内二丁目を番２号
三菱化成工業株式会社内
！ 補正の対象 明細書の「特許請求の範囲」の欄特
許請求の範囲
（１）極限粘度〔η〕が！；、０ｄｌ１７９以上の超高
分子量ポリオレフィン（Ｎ５〜６０重量％、！：（ＡＪ
の融点以上の沸点を有する炭化水素系可塑剤ｒＢ） ＜
（θ〜９！重量係からなる混合物をダイスを通じてフィ
ルム、シート、又は中空状の成形物（Ｃ１に押出し、縦
方向の延伸倍率をＡｌ、横方向の延伸倍率をλ２とした
ときλｉ〉／、！、λ２ ） ／、ｒ及びλ１×λ２く
りを満足する様に上記成形物ｔａｒをｆＡ）の融点以下
で２軸延伸して得たフィルムを（Ｂ）成分の可溶な溶媒
（勾でｆＢ）成分を抽出除去する事を特徴とする、超高
分子量ポリオレフィン多孔透過性フィルムの製造方法。Procedural amendment/Indication of incident Showa ≦ 0 years/months! Patent Application Filed on 2017-2013 Process for Producing Ultra-High Molecular Weight Polyolefin Porous Transparent Film 3 Amendment Applicant (j94) Mitsubishi Chemical Industries, Ltd. Agent 〒1
00 Inside Mitsubishi Chemical Corporation, No. 2, Marunouchi 2-chome, Chiyoda-ku, Tokyo! Target of amendment In the “Claims” section of the specification, the scope of claims (1) Intrinsic viscosity [η]! ;, 0dl 179 or more ultra-high molecular weight polyolefin (N5-60% by weight, !: (AJ
A hydrocarbon plasticizer having a boiling point higher than the melting point rB) <
(When the mixture consisting of θ~9! weight coefficient is extruded into a film, sheet, or hollow molded product (C1) through a die, and the stretching ratio in the longitudinal direction is Al and the stretching ratio in the horizontal direction is λ2, λi>/, !, λ2 ) /, r and λ1×λ2 ) A method for producing an ultra-high molecular weight polyolefin porous permeable film, characterized by extracting and removing components.
（２）延伸温度が超高分子量ポリオレフィン（Ａ）の融
点（Ｔｍ）とＴｍ−１０℃の間である特許請求の範囲第
（１）項記載の透過性フィルムの製造方法。(2) The method for producing a transparent film according to claim (1), wherein the stretching temperature is between the melting point (Tm) of the ultra-high molecular weight polyolefin (A) and Tm-10°C.
（３）極限粘度〔η〕がｊ、 Ｏｄｌｌ／を以上の超高
分子量ポリオレフィン（Ａ） ｔ−６０重量％と（Ｎの
融点以上の沸点を有する炭化水素系可塑剤Ｉ１１ ＜’
θ〜９！重量係からなる混合物をダイスを通じてフィル
ム、シート又は中空状の成形物ｉｃ）に押出し、該（Ｃ
ｌより可塑剤（Ｂ）を１Ｂｌ成分可溶な溶媒（Ｉ）ｌで
抽出除去した後縦倍率λ１、横倍率をλ２としたとき、
ハ〉７．！、λ２ ） ／、ｒ及びλ１×λ２く２０を
満足する様に、上記成形物（Ｃ１を（Ａｌの融点以下で
２軸延伸する事を特徴とする超高分子量ポリオレフィン
多孔化透過性フィルムの製造方法。(3) Ultra-high molecular weight polyolefin (A) with an intrinsic viscosity [η] of j, Odll/ or more t-60% by weight and a hydrocarbon plasticizer I11 having a boiling point higher than the melting point of (N
θ～9! The mixture consisting of the weight fraction is extruded through a die into a film, sheet or hollow molded product ic), and the mixture consisting of the (C
When the vertical magnification is λ1 and the horizontal magnification is λ2 after extracting and removing the plasticizer (B) with 1Bl component-soluble solvent (I) l,
C〉7. ! , λ2 )/, r and λ1×λ2 Method.
（４）極限粘度〔ｖ〕が！、θｄＩ２／２以上の超高分
子量ポリオレフィン＋Ａ） ｊ Ｓ−６０重量％と（蜀
の融点以上の沸点を有する炭化水素系可塑剤（Ｂｌ ＆
０〜り夕重量％からなる混合物をダイスを通じてフィ
ルム、シート、又は中空状の成形物ＩＣ）に押出し、該
成形物（Ｃ）をまず縦方向に（Ａ）の融点以下の温度で
延伸倍率λ１で延伸した後、可塑剤（Ｂ）を（Ｂ）成分
可溶な溶媒ＣＤ）で抽出除去し、その後頁に横方向に（
Ａｌの融点以下の温度で延伸倍率λ２に延伸する時、λ
、’）ｙ、ｓ、λ２〉／、！及びλＩ×λ２く、２０を
満足する様に成形物＋Ｃ）をコ軸延伸する事を特徴とす
る、超高分子量ポリオレフィン多孔化透過性フィルムの
製造方法。(4) Intrinsic viscosity [v]! , θdI2/2 or more ultra-high molecular weight polyolefin + A) j S-60% by weight and a hydrocarbon plasticizer (Bl &
A mixture consisting of 0 to 50% by weight is extruded through a die into a film, sheet, or hollow molded product IC), and the molded product (C) is first stretched in the longitudinal direction at a stretching ratio of λ1 at a temperature below the melting point of (A). After stretching, the plasticizer (B) is extracted and removed with a solvent (CD) that is soluble in component (B), and then stretched horizontally on the page (
When stretching to a stretching ratio of λ2 at a temperature below the melting point of Al, λ
,')y,s,λ2〉/,! A method for producing an ultra-high molecular weight polyolefin porous and permeable film, which comprises coaxially stretching the molded article +C) so as to satisfy λI×λ2 and 20.
Claims (4)
量ポリオレフイン（Ａ）５〜６０重量％と（Ａ）の融点
以上の沸点を有する炭化水素系可塑剤（Ｂ）４０〜９５
重量％からなる混合物をダイスを通じてフイルム、シー
ト、又は中空状の成形物（Ｃ）に押出し、縦方向の延伸
倍率をλ＿１、横方向の延伸倍率をλ＿２としたときλ
＿１＞１．５、λ＿２＞１．５及びλ＿１×λ＿２＞９
を満足する様に上記成形物（Ｃ）を（Ａ）の融点以下で
２軸延伸して得たフイルムを（Ｂ）成分の可溶な溶媒（
Ｄ）で（Ｂ）成分を抽出除去する事を特徴とする、超高
分子量ポリオレフイン多孔化透過性フイルムの製造方法
。(1) Ultra-high molecular weight polyolefin (A) with an intrinsic viscosity [η] of 5.0 dl/g or more (5 to 60% by weight) and a hydrocarbon plasticizer (B) having a boiling point higher than the melting point of (A) 40 to 95%
% by weight is extruded through a die into a film, sheet, or hollow molded product (C), and when the longitudinal stretching ratio is λ_1 and the transverse stretching ratio is λ_2, λ
_1>1.5, λ_2>1.5 and λ_1×λ_2>9
A film obtained by biaxially stretching the above molded product (C) below the melting point of (A) so as to satisfy
A method for producing a porous, permeable ultra-high molecular weight polyolefin film, which comprises extracting and removing component (B) in step D).
点（Ｔｍ）とＴｍ−１０℃の間である特許請求の範囲第
（１）項記載の透過性フイルムの製造方法。(2) The method for producing a transparent film according to claim (1), wherein the stretching temperature is between the melting point (Tm) of the ultra-high molecular weight polyolefin (A) and Tm-10°C.
量ポリオレフイン（Ａ）５〜６０重量％と（Ａ）の融点
以上の沸点を有する炭化水素系可塑剤（Ｂ）４０〜９５
重量％からなる混合物をダイスを通じてフイルム、シー
ト又は中空状の成形物（Ｃ）に押出し、該（Ｃ）より可
塑剤（Ｂ）を（Ｂ）成分可溶な溶媒（Ｄ）で抽出除去し
た後縦倍率λ＿１、横倍率をλ＿２としたとき、λ＿１
＞１．５、λ＿２＞１．５及びλ＿１×λ＿２＞２０を
満足する様に、上記成形物（Ｃ）を（Ａ）の融点以下で
２軸延伸する事を特徴とする超高分子量ポリオレフイン
多孔化透過性フイルムの製造方法。(3) Ultra-high molecular weight polyolefin (A) with an intrinsic viscosity [η] of 5.0 dl/g or more (5 to 60% by weight) and a hydrocarbon plasticizer (B) having a boiling point higher than the melting point of (A) 40 to 95%
After extruding the mixture consisting of % by weight through a die into a film, sheet, or hollow molded article (C), and extracting and removing the plasticizer (B) from the (C) with a solvent (D) that is soluble in the component (B). When the vertical magnification is λ_1 and the horizontal magnification is λ_2, λ_1
>1.5, λ_2>1.5 and λ_1×λ_2>20, the above molded product (C) is biaxially stretched at a temperature below the melting point of (A). Method for producing transparent film.
量ポリオレフイン（Ａ）５〜６０重量％と（Ａ）の融点
以上の沸点を有する炭化水素系可塑剤（Ｂ）４０〜９５
重量％からなる混合物をダイスを通じてフイルム、シー
ト、又は中空状の成形物（Ｃ）に押出し、該成形物（Ｃ
）をまず縦方向に（Ａ）の融点以下の温度で延伸倍率λ
＿１で延伸した後、可塑剤（Ｂ）を（Ｂ）成分可溶な溶
媒（Ｄ）で抽出除去し、その後更に横方向に（Ａ）の融
点以下の温度で延伸倍率λ＿２に延伸する時、λ＿１＞
１．５、λ＿２＞１．５及びλ＿１×λ＿２＜２０を満
足する様に成形物（Ｃ）を２軸延伸する事を特徴とする
、超高分子量ポリオレフイン多孔化透過性フイルムの製
造方法。(4) Ultra-high molecular weight polyolefin (A) with an intrinsic viscosity [η] of 5.0 dl/g or more (5 to 60% by weight) and a hydrocarbon plasticizer (B) having a boiling point higher than the melting point of (A) 40 to 95%
% by weight is extruded through a die into a film, sheet, or hollow shaped article (C).
) in the longitudinal direction at a temperature below the melting point of (A) at a stretching ratio λ.
After stretching at _1, the plasticizer (B) is extracted and removed with a solvent (D) that is soluble in the (B) component, and then further stretched in the transverse direction to a stretching ratio of λ_2 at a temperature below the melting point of (A), λ_1>
1.5, a method for producing an ultra-high molecular weight polyolefin porous permeable film, which comprises biaxially stretching the molded product (C) so as to satisfy λ_2>1.5 and λ_1×λ_2<20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27423185A JPH0621177B2 (en) | 1985-12-05 | 1985-12-05 | Method for producing ultra high molecular weight polyolefin porous permeable film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27423185A JPH0621177B2 (en) | 1985-12-05 | 1985-12-05 | Method for producing ultra high molecular weight polyolefin porous permeable film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62132943A true JPS62132943A (en) | 1987-06-16 |
| JPH0621177B2 JPH0621177B2 (en) | 1994-03-23 |
Family
ID=17538837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27423185A Expired - Lifetime JPH0621177B2 (en) | 1985-12-05 | 1985-12-05 | Method for producing ultra high molecular weight polyolefin porous permeable film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0621177B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993012920A1 (en) * | 1991-12-27 | 1993-07-08 | Mitsui Petrochemical Industries, Ltd. | Biaxially oriented high-molecular polyethylene film and production thereof, and surface-modified, biaxially oriented high-molecular polyethylene film and production thereof |
| US6127438A (en) * | 1995-03-03 | 2000-10-03 | Asahi Kasei Kogyo Kabushiki Kaisha | Polyethylene microporous film and process for producing the same |
| JP2014523936A (en) * | 2011-06-16 | 2014-09-18 | スリーエム イノベイティブ プロパティズ カンパニー | Microporous material with fine fiber mesh structure and method for producing and using the same |
-
1985
- 1985-12-05 JP JP27423185A patent/JPH0621177B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993012920A1 (en) * | 1991-12-27 | 1993-07-08 | Mitsui Petrochemical Industries, Ltd. | Biaxially oriented high-molecular polyethylene film and production thereof, and surface-modified, biaxially oriented high-molecular polyethylene film and production thereof |
| AU650587B2 (en) * | 1991-12-27 | 1994-06-23 | Mitsui Chemicals, Inc. | Biaxially oriented high-molecular polyethylene film and production thereof, and surface-modified, biaxially oriented high-molecular polyethylene film and production thereof |
| US6127438A (en) * | 1995-03-03 | 2000-10-03 | Asahi Kasei Kogyo Kabushiki Kaisha | Polyethylene microporous film and process for producing the same |
| JP2014523936A (en) * | 2011-06-16 | 2014-09-18 | スリーエム イノベイティブ プロパティズ カンパニー | Microporous material with fine fiber mesh structure and method for producing and using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0621177B2 (en) | 1994-03-23 |
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