JP4127025B2 - Resin film formation method - Google Patents

Description

【００４１】
＜実施例１＞
図１に示すように、混練部(I）の単軸押出機１により予め予備混練を施した溶融樹脂Ａ１（超低密度ポリエチレン）を、易剥離ロール部(III) の易剥離ロール１１、１１間に、ロール軸方向に離間対向するバンク１２の離間距離を６００ｍｍに設定して供給し、樹脂Ａ１の供給幅と供給量を易剥離ロール１１、１１の対向隙間にて調整しながら、溶融樹脂Ａ１を、基材フィルムＣ３（紙基材：坪量８０ｇ／ｍ² ）、Ｃ４（ポリエチレンテレフタレートフィルム：厚さ２５μｍ）にて挟み込みながらカレンダー成形部(II)のカレンダーロール２１、２１間に供給し、易剥離ロール１１の加工温度１１０〜１５０℃、カレンダーロール２１の加工温度１５０〜１７０℃、加工速度１０ｍ／ｍｉｎに設定して、溶融樹脂Ａ１の製膜を行った。
その結果、厚さ２０μｍの樹脂Ａ１による樹脂膜を基材フィルムＣ３、Ｃ４にて挟み込んだ積層フィルムＤが得られた。この樹脂Ａ１（超低密度ポリエチレン）は、基材フィルムＣ３（紙基材）とＣ４（ポリエチレンテレフタレートフィルム）に対して接着良好であることから、紙／ＰＥＴ間の接着性樹脂として機能することが可能となった。
【００４２】
＜実施例２＞
実施例１と同じ条件（但し易剥離ロール１１の加工温度１１０〜１５０℃、カレンダーロール２１の加工温度２１０℃）で、樹脂Ａ２（エチレン−アクリル酸エチルとエチレン−酢酸ビニル共重合体のアクリル酸グリシジルとアクリル系シラングラフト共重合体からなるブレンド物）を基材フィルムＣ１（シリコーン処理易剥離ポリエチレンテレフタレートフィルム：厚さ５０μｍ）、Ｃ５（アルミニウム箔：厚さ４０μｍ）で挟み込み製膜した。その結果、３０μｍの樹脂Ａ２による樹脂膜を基材フィルムＣ１、Ｃ５にて挟み込んだ積層フィルムＤが得られた。この樹脂Ａ２は基材フィルムＣ５と接着性が良好であり、基材フィルムＣ１に対して剥離性が良好であることから、易剥離フィルムとしての基材フィルムＣ１に感熱接着タイプの樹脂Ａ２による樹脂膜を積層した感熱接着フィルムとして使用することが可能であった。
【００４３】
＜実施例３＞
実施例１と同じ条件で、樹脂Ａ３（ポリエステルウレタン）を２枚の基材フィルムＣ１（シリコーン処理易剥離ポリエチレンテレフタレートフィルム：厚さ５０μｍ）で挟み込み製膜した。その結果、３０μｍの樹脂Ａ３からなる樹脂膜を基材フィルムＣ１にて挟み込んだ積層フィルムＤが得られた。この樹脂Ａ３は基材フィルムＣ１に対して剥離性が良好であることから、積層フィルムＤから基材フィルムＣ１を剥離することにより、樹脂Ａ３による単膜フィルムを得ることが可能であった。
【００４４】
＜実施例４＞
実施例１と同じ条件で、樹脂Ａ４（共重合ポリエステル）を基材フィルムＣ１（シリコーン処理易剥離ポリエチレンテレフタレートフィルム：厚さ５０μｍ）と基材フィルムＣ２（酸化チタン含有白色ポリエチレンテレフタレートフィルム：厚さ１８８μｍ）で挟み込み製膜した。その結果、３０μｍの樹脂Ａ４からなる樹脂膜を基材フィルムＣ１、Ｃ２にて挟み込んだ積層フィルムＤが得られた。この樹脂Ａ２は基材フィルムＣ２と接着性が良好であり、Ｃ１に対しては剥離性が良好である。この樹脂Ａ４（共重合ポリエステル）はポリエステルフィルムとのヒートシール性に優れることから、易剥離フィルムとしての基材フィルムＣ１に感熱接着タイプの樹脂Ａ４による樹脂膜を積層したポリエステル樹脂接着用の感熱接着フィルムとして使用することが可能であった。
【００４５】
＜比較例１＞
実施例１において、樹脂Ａ１（超低密度ポリエチレン）を押出しラミネート法により得ようと試みたが、樹脂のもつ粘着性の影響で離ロール性が非常に悪く、膜を得ることができなかった。
【００４６】
＜比較例２＞
実施例２において、樹脂Ａ２（エチレン−アクリル酸エチルとエチレン−酢酸ビニル共重合体のアクリル酸グリシジルとアクリル系シラングラフト共重合体からなるブレンド物）を押出ラミネート法により製膜を試みたが、２００℃以下の温度では引き取り性が低く、２３０℃を超える加工では、シラン部位の架橋によりゲルが多発し、製膜は可能であるが外観不良を伴った。
【００４７】
＜比較例３＞
実施例３において、押出ラミネート法により製膜を試みたが、樹脂の粘度が非常に高くドローダウン性に劣り、引き取りの際に膜割れが発生し、製膜不可能であった。
【００４８】
＜比較例４＞
実施例４において、押出ラミネート法により製膜を試みたが、溶融張力が小さくサージングが顕著であったため、幅方向および流れ方向の膜厚精度に課題を残した。また、離ロール性が悪く加工が非常に困難であった。
【００４９】
【発明の効果】
本発明の樹脂の製膜方法によれば、押出ラミネーションやインフレーションや押出キャストなどにおいて引き取り性や延展性の低い樹脂や、低結晶性あるいは非結晶性で、その樹脂自体に粘着性のある樹脂、あるいは熱などにより容易に架橋しうる樹脂として、上述した樹脂Ａ（例えばＡ１〜Ａ４）を、単膜あるいは各種基材との積層体として製膜でき、好適な樹脂の製膜方法を提供できるものである。
【００５０】
また、樹脂Ａが持つ特性が故に、従来の製膜方法では製膜加工が困難であったものが、本発明の製膜方法によれば、樹脂Ａの特性を活かしながらも、かつ薄膜に製膜することが可能になり、粘着性、架橋性、接着性など、従来では製膜が困難であった樹脂でも製膜することが可能になる。
【００５１】
また、上述した樹脂Ａは、必要に応じて各種添加剤を配合して、様々な機能性フィルムとして製膜することができ、今後期待される電解質膜や各種エラストマーなどの機能性フィルムを製膜する有効な方法として優れた効果を発揮するものである。
【図面の簡単な説明】
【図１】本発明の樹脂の製膜方法を説明する製膜装置の概要図。
【図２】本発明の樹脂の製膜方法により得られる積層フィルムの側断面図。
【符号の説明】
(I) …混練部 (II)…カレンダー成形部 (III) …易剥離ロール部
１…押出機 ２…ミキサー
１１…易剥離ロール １２…バンク
２１…カレンダーロール ２２…カレンダーロール
Ａ…樹脂Ａ Ｃ…基材フィルム Ｄ…積層フィルム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for forming a resin film. Specifically, in extrusion lamination, inflation, extrusion casting, and the like, a resin having poor take-off property and spreadability, low crystallinity or non-crystalline property, and sticking to the resin itself. Film formation of a resin that is difficult to form, such as a certain resin or a resin that can be easily cross-linked by heat or the like, but is suitable for obtaining a single film of a resin having various functions or a laminate with various substrates Regarding the method.
[0002]
[Prior art]
There are two methods for forming a resin film, such as extrusion lamination, inflation, extrusion casting, etc., where the film is formed after heating / melting above the softening point of the resin, and after the resin is dissolved with a solvent, the solvent is removed. Examples thereof include a solvent casting method for forming a film and a calender molding method for forming a film by heating the resin to a temperature higher than the softening point and then rolling it with a plurality of rolls.
[0003]
The film forming methods described above are variously developed according to the physical properties of each resin. However, with regard to extrusion lamination molding, inflation molding, and cast molding, processing suitability is low for resins having no melt tension and resins having no spreadability. Moreover, about low crystalline resin or non-crystalline resin whose glass transition temperature (Tg) is lower than room temperature, problems such as roll release and blocking between films are manifested due to the development of adhesiveness. Furthermore, although the manufacturing method mentioned above forms a film using an extruder, since these apparatuses have long residence time in the extruder, resin which is easy to thermally deteriorate, heat crosslinkable resin or resin composition It is difficult to process things.
[0004]
With respect to the solvent casting method, since it is necessary to dissolve the resin in the solvent once, it is difficult to restrict the resin that is soluble in the solvent and to select the solvent. In addition, the use of a solvent has problems of environmental aspects such as affecting the human body and the environment, and production capacity aspects such as a reduction in processing speed (less than 1 m / min) due to drying of the solvent.
[0005]
Calendar molding also has a problem that it is a manufacturing method unsuitable for highly adhesive resins and that it is difficult to form a thin film.
[0006]
The resin physical properties that work adversely in each of the above-mentioned film forming methods, when turned upside down, become unique functions of the resin. Adhesive resins and crosslinkable resins are expected to have future functional trends as various functional films. . In this sense, by improving the film forming method, it is expected that a new film forming method for a functional resin, which has been difficult with the conventional manufacturing method, will appear.
[0007]
[Problems to be solved by the invention]
The present invention takes the above-mentioned circumstances into consideration, and more specifically, a resin having low take-off property or spreadability in extrusion lamination, inflation, extrusion casting, or the like, or low crystalline or non-crystalline, and sticking to the resin itself. It is an object of the present invention to provide a method for forming a resin suitable for obtaining a single film of a certain resin, a resin that can be easily cross-linked by heat or the like, or a laminate with various substrates.
[0008]
In the invention according to claim 1 of the present invention, two opposing easy peels obtained by subjecting the resin A melt-plasticized using the kneading part (I) such as an extruder or a batch kneader to an easy peel process. The resin A is introduced into the calendering part (II) while being introduced into the easy-peeling roll part (III) made of a roll and controlling the continuous supply amount and supply width of the resin A with the clearance between the easy-peeling roll part (III). supplies, the calendering unit (II), at least one or more of the elongated substrate film have passed between the calender rolls, while sandwiching the resin a in the substrate film, between the calender rolls A resin film-forming method characterized by forming a resin A film.
[0011]
The invention according to claim 2 of the present invention is the method for forming a resin according to claim 1, wherein the resin A is formed and the resin A is peeled off by peeling one or more kinds of the substrate films. It is a resin film forming method characterized by forming a single film or a laminated film of two or more layers comprising a resin A and a base film.
[0012]
The invention according to claim 3 of the present invention is the resin film-forming method according to any one of claims 1 to 2 , wherein when the rolling is performed using the calender molding part (II), It is a resin film-forming method characterized by rolling under calendar molding conditions of (melting point) <film-forming temperature <(melting point of substrate film).
[0013]
The invention according to claim 4 of the present invention is the resin film forming method according to any one of claims 1 to 3 , wherein at least one of the one or more kinds of the base films sandwiching the resin A.
An easy peeling process is performed on the surface of the base film in contact with the resin A, which is a resin film forming method.
[0014]
The invention according to claim 5 of the present invention is the method for forming a resin according to any one of claims 1 to 4 , wherein the resin A is formed in a layer thickness of 10 to 100 μm. This is a characteristic method of forming a resin film.
[0016]
Invention, the film forming method of the resin according to any one of the claims 1 to 5, wherein the resin A is the glass transition temperature of 100 ° C. The following non-crystalline thermoplastic resin according to claim 6 of the present invention This is a method for forming a resin film.
[0017]
The invention according to claim 7 of the present invention is the resin film-forming method according to any one of claims 1 to 6 , wherein the resin A is low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene- α-olefin copolymer, polypropylene, polyolefin resin typified by propylene-α-olefin copolymer or modified product thereof, ethylene-α, β-unsaturated carboxylic acid, esterified product of ethylene-α, β-unsaturated carboxylic acid, ethylene -Ion cross-linked products of α, β unsaturated carboxylic acids, ethylene copolymers represented by ethylene-vinyl acetate copolymers or modified products thereof, copolyesters, aliphatic polyesters, oxyacids or intramolecular rings thereof Polyester resins typified by polymer of polymers or modified products thereof, polyethers and polyether copolymers Alternatively, a resin film forming method characterized by being a modified product thereof.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
This will be described in detail below with reference to FIG.
In the resin film-forming method of the present invention, a film-forming apparatus is roughly divided into a kneading part (I) for kneading resin A such as an extruder 1 and a Banbury mixer 2 and a calendering part (II). Moreover, as shown in FIG. 1, between the kneading part (I) and the calendering part (II), an easy peeling roll part (III When the melt-plasticized resin A supplied continuously in the case of the extruder 1 and batchwise in the case of the Banbury mixer 2 is supplied to the calender molding part (II), A stable resin supply amount and supply width can be guaranteed. In addition, this easy peeling roll part (III) is installed according to the various physical properties which affect film formation, such as melt viscosity of resin A, and melt tension.
[0019]
The kneading part (I) is a unit for melt plasticizing the resin A, and is used for the purpose of blending various additives as required. As the kneading device of the kneading section (I), an extruder 1 or a mixer 2 such as a Banbury mixer can be used. If the extruder 1 is used, the type and shape of a single-screw or twin-screw extruder are used. There are no restrictions. Moreover, if it is the extruder 1, the shape of die | dye does not choose kind, such as T die and a strand die.
[0020]
The calendar forming part (II) is composed of two calendar rolls 21 and 21 which rotate opposite to each other and have a smooth peripheral surface which is mirror-finished and is not restricted by the roll shape, size and number. For example, as in the calendar forming part (II) on the left side of FIG. 1, a two-roll type consisting of two calendar rolls 21 and 21 facing each other, as in the calendar forming part (II) on the right side of FIG. Two calendar rolls 21 and 21 facing each other, and two calendar rolls 22 and 22 facing and rotating in a reverse L-shape as a whole are directly opposite to one of the calendar rolls 21 and 21. Various selections such as the arranged four roll type are possible. In addition, since the calender roll can apply pressure to a pressure higher than that of the extrusion laminator, the film thickness control and the thermal lamination can be performed in-line using a plurality of rolls. At this time, in forming the resin A shown below in the calendar molding part (II), as shown in FIG. 1, one or more long base films C are applied to the winding part (V). It is preferable to form the film while sandwiching the resin A by passing it while winding.
[0021]
The above-described method is a method in which the method of passing the base film C is added to the conventional calendar molding, but the following advantages are obtained by passing the base film C.
[0022]
First of all, even when the resin A is a resin that is extremely sticky or a resin that does not have melt tension and is inferior in take-up property and spreadability, it is possible to perform rolling with a calendar. Secondly, it has been difficult to form a thin film by conventional calender molding, but by using the through base film C, the take-up property is improved and the resin A can be made thin. By using this method, it is possible to form a 10 μm thin film. Thirdly, in the calender molding, since heat and pressure are applied as described above, it is possible to impart not only film formation but also heat lamination effects. In that sense, the resin A can be laminated on the paper substrate, or the resin A such as an adhesive resin can be laminated on the metal foil substrate. Further, as the base film C, the base film C having a coat layer imparted with easy peelability such as a fluorine-based resin such as polyvinylidene fluoride and polytetrafluoroethylene, or a silicone-based resin can be used to easily peel off. It is also possible to obtain a conductive multilayer film or a single film of resin A. These base films C will be described later.
[0023]
As described above, the easy-peeling roll part (III) composed of the two easy-peeling rolls 11 and 11 can be installed as necessary. However, as shown in FIG. 1, a bank 23 (resin pool), which is a reservoir for the supplied molten resin A, is formed between the calender rolls 21 and 21 as in the calender forming section (II), and is thinned by pressure. In doing so, if there is a through substrate film C, the bank 23 may cause wrinkles from the resin supply portion as a starting point. In order to reduce wrinkles as much as possible, the amount of the resin A supplied between the rolls 21 and 21 of the calendar forming part (II) is always kept constant, and the film forming width of the resin supplied between the calendar rolls 21 and 21 is controlled. However, by arranging the two easily peelable rolls 11 and 11 of this easily peelable roll part (III), a stable supply amount of the resin A to the calendar forming part (II) is guaranteed, It can lead to film thickness control and wrinkle improvement. In addition, the easy peeling treatment to the easy peeling rolls 11 and 11 can be performed by using a resin A having a stickiness if a treatment with silicone or tetrafluoroethylene (Teflon (registered trademark)) is used. The resin A can be smoothly supplied to the molding part (II).
[0024]
By using such a film forming apparatus, it is possible to form a film with good film thickness accuracy for any resin A shown below. If necessary, a cross-linking device (resin A cross-linking and curing treatment), a surface treatment device, a slitter, or the like may be mounted after calendering.
[0025]
Examples of the resin A that can be formed using the film forming apparatus shown in FIG. 1 include low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-α olefin copolymer, polypropylene, and propylene-α olefin copolymer. The polyolefin resin represented is mentioned.
[0026]
Further, a modified product obtained by modifying the above-described polyolefin resin with a maleic anhydride, glycidyl methacrylate, vinyl, acrylic silane, or the like by a graft reaction can also be used.
[0027]
Furthermore, ethylene- (meth) acrylic acid copolymer, various esterified products of ethylene- (meth) acrylic acid, various ionic cross-linked products of ethylene- (meth) acrylic acid, ethylene- (meth) acrylic acid- (meth) acrylic Ethylene copolymers such as acid ester terpolymer, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic acid glycidyl copolymer, ethylene-maleic anhydride- (meth) acrylic acid ester copolymer Can also be used.
[0028]
Furthermore, a modified product obtained by modifying the above-described resin with a maleic anhydride, glycidyl methacrylate, vinyl, acrylic silane, or the like by a graft reaction can be used.
[0029]
In addition, dicarboxylic acids such as terephthalic acid, isophthalic acid, succinic acid, adipic acid, sebacic acid, and azelaic acid can be used together with diols such as ethylene glycol, 1,4-butanediol, 1,6-hexanediol, and neopentyl glycol. Polymerized copolyesters, aliphatic polyesters, oxyacids such as lactic acid or caprolactone, and polyester resins represented by polylactic acid and polyε caprolactone, which are polymers of intramolecular cyclized products of oxyacids, or modified products thereof But it can be used.
[0030]
In addition, these polyester resins are trifunctional or more functionalized in the form of isocyanate monomers such as tolylene diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, or adducts, burettes, isocyanurates and the like. Polyester urethane stretched with a functional isocyanate can also be used.
[0031]
In addition, polyether resins such as polyethylene oxide and polypropylene oxide mainly composed of ethylene oxide (EO) and propylene oxide (PO) may be used, and the above-described isocyanate compounds may be added to these polyether polymers. Polyether urethane obtained by the action can also be used.
[0032]
Films formed using these resins A are adhesive films, crosslinked films, biodegradable films by blending various additives such as tackifiers, crosslinking agents, and various salts into resin A as necessary. It can be used as various functional films such as an adhesive film, an antistatic film, and an electrolyte film.
[0033]
Various materials can be used as the base film C. Examples include polyolefin resins such as polyethylene and polypropylene, polyester resins, polyamide resins, paper base materials, metal foils, and the like. In addition, these base films may be subjected to various surface treatments as necessary. Further, an easily peelable film provided with a tetrafluoroethylene-based or silicone-based coating layer may be used.
[0034]
As an example of film formation using these resins A and base films C, first, using the film forming apparatus, the resin A is sandwiched between one or two base films C, and heat / pressure is used. A laminated film D of base film C / resin A / base film C can be formed. At this time, the two base films C and C introduced into the calender forming part (II) may be the same material or different materials.
[0035]
Next, the laminated film D of the structure of the base film C which made the base film C / resin A / easy release processing film can be formed into a film by making one of the base films C into an easy release processing film. This configuration can be used as an adhesive label provided with a separator made of an easily peelable film (base film C) by using a pressure-sensitive adhesive resin or a heat-sensitive adhesive resin for the resin A.
[0036]
Moreover, the laminated film D of the structure of easy-peel process film C / resin A / easily-peel process film C can be formed into a film by making both the base film C into an easy-peel process film, and it peels easily in the last process. It is also possible to obtain a single film of the resin A by peeling both the treated films C and C.
[0037]
In forming the laminated film D having the above-described laminated structure, the film forming temperature is determined by the calendar molding part (II) under the condition of (melting point of the resin A) <film forming temperature <(melting point of the base film C). It is necessary to form a film of the resin A by rolling. Rolling molding cannot be performed below the melting point of the resin A, and film thickness accuracy and take-up properties are affected above the melting point of the base film C. It is preferable that the base film C is formed at a temperature that does not cause heat shrinkage.
[0038]
【Example】
Hereinafter, the method for forming a resin film of the present invention will be described in detail with specific examples.
[0039]
(Materials used)
・ Resin A
A1: Ultra-low density polyethylene: (Density d = 0.89 g / cm ³ ): Melting point Tm = 70-80 ° C.
A2: Blend of ethylene-ethyl acrylate and ethylene-vinyl acetate copolymer consisting of glycidyl acrylate and acrylic silane graft copolymer: melting point Tm = 80-90 ° C.
A3: Polyester urethane (acid component: terephthalic acid-isophthalic acid-adipic acid, diol component: 1,4-butanediol, isocyanate: tolylene diisocyanate): melting point Tg = 30 ° C.
A4: Copolyester (acid component: terephthalic acid-isophthalic acid-adipic acid): melting point Tm = 85 ° C.
・ Base film C
C1: Silicone-treated easy-peeling polyethylene terephthalate film: 50 μm thick
C2: White polyethylene terephthalate film containing titanium oxide: Thickness 188 μm
C3: Paper base material: Basis weight 80 g / m ²
C4: Polyethylene terephthalate film: thickness 25 μm
C5: Aluminum foil: thickness 40 μm
[0040]

[0041]
<Example 1>
As shown in FIG. 1, a molten resin A1 (ultra-low density polyethylene) preliminarily kneaded by a single-screw extruder 1 in a kneading part (I) is used as an easy peeling roll 11, 11 in an easy peeling roll part (III). In the meantime, the separation distance of the banks 12 that are spaced apart and facing each other in the roll axis direction is set to 600 mm, and the molten resin is adjusted while adjusting the supply width and supply amount of the resin A1 in the facing gap between the easily peelable rolls 11 and 11. A1 is fed between the calender rolls 21 and 21 of the calender molding part (II) while being sandwiched between the base film C3 (paper base material: basis weight 80 g / m ² ) and C4 (polyethylene terephthalate film: thickness 25 μm). The melt resin A1 was formed by setting the processing temperature of the easy peeling roll 11 to 110 to 150 ° C., the processing temperature of the calendar roll 21 to 150 to 170 ° C., and the processing speed of 10 m / min.
As a result, a laminated film D was obtained in which a resin film made of a resin A1 having a thickness of 20 μm was sandwiched between base films C3 and C4. Since this resin A1 (ultra-low density polyethylene) has good adhesion to the base film C3 (paper base) and C4 (polyethylene terephthalate film), it can function as an adhesive resin between paper / PET. It has become possible.
[0042]
<Example 2>
Resin A2 (acrylic acid of ethylene-ethyl acrylate and ethylene-vinyl acetate copolymer) under the same conditions as in Example 1 (however, the processing temperature of the easy peeling roll 11 is 110 to 150 ° C. and the processing temperature of the calendar roll 21 is 210 ° C.) A blend of glycidyl and an acrylic silane graft copolymer) was sandwiched between a base film C1 (silicone-treated easily peelable polyethylene terephthalate film: thickness 50 μm) and C5 (aluminum foil: thickness 40 μm) to form a film. As a result, a laminated film D in which a resin film made of 30 μm resin A2 was sandwiched between base films C1 and C5 was obtained. Since this resin A2 has good adhesiveness with the base film C5 and has good peelability with respect to the base film C1, the resin A2 of the heat sensitive adhesive type resin A2 is applied to the base film C1 as an easily peelable film. It was possible to use it as a heat-sensitive adhesive film with laminated films.
[0043]
<Example 3>
Under the same conditions as in Example 1, resin A3 (polyester urethane) was sandwiched between two base film C1 (silicone-treated easily peelable polyethylene terephthalate film: thickness 50 μm) to form a film. As a result, a laminated film D in which a resin film made of 30 μm resin A3 was sandwiched between base films C1 was obtained. Since this resin A3 has good peelability with respect to the base film C1, by peeling the base film C1 from the laminated film D, it was possible to obtain a single film by the resin A3.
[0044]
<Example 4>
Under the same conditions as in Example 1, the resin A4 (copolymerized polyester) was mixed with the base film C1 (silicone-treated easily peelable polyethylene terephthalate film: thickness 50 μm) and the base film C2 (titanium oxide-containing white polyethylene terephthalate film: thickness 188 μm). ) To form a film. As a result, a laminated film D in which a resin film made of 30 μm resin A4 was sandwiched between base films C1 and C2 was obtained. This resin A2 has good adhesiveness with the base film C2, and has good peelability with respect to C1. Since this resin A4 (copolyester) is excellent in heat-sealability with a polyester film, a heat-sensitive adhesive for bonding a polyester resin in which a resin film made of a heat-sensitive adhesive resin A4 is laminated on a base film C1 as an easily peelable film. It could be used as a film.
[0045]
<Comparative Example 1>
In Example 1, an attempt was made to obtain resin A1 (ultra-low-density polyethylene) by an extrusion laminating method, but due to the adhesiveness of the resin, the roll-off property was very poor and a film could not be obtained.
[0046]
<Comparative example 2>
In Example 2, an attempt was made to form a film of the resin A2 (a blend of glycidyl acrylate and an acrylic silane graft copolymer of ethylene-ethyl acrylate and ethylene-vinyl acetate copolymer) by an extrusion lamination method. At a temperature of 200 ° C. or lower, the take-off property is low, and in processing exceeding 230 ° C., gels frequently occur due to cross-linking of the silane sites, and film formation is possible, but with a poor appearance.
[0047]
<Comparative Example 3>
In Example 3, an attempt was made to form a film by the extrusion laminating method, but the viscosity of the resin was very high and the drawdown property was inferior.
[0048]
<Comparative example 4>
In Example 4, film formation was attempted by the extrusion laminating method, but since the melt tension was small and the surging was remarkable, a problem remained in the film thickness accuracy in the width direction and the flow direction. Moreover, the roll release property was poor and the processing was very difficult.
[0049]
【The invention's effect】
According to the resin film-forming method of the present invention, a resin having low take-off property or spreadability in extrusion lamination, inflation, extrusion casting, or the like, or a resin having low crystallinity or non-crystallinity and sticking to the resin itself, Alternatively, as a resin that can be easily cross-linked by heat or the like, the above-described resin A (for example, A1 to A4) can be formed as a single film or a laminate with various substrates, and a suitable method for forming a resin can be provided. It is.
[0050]
In addition, because of the properties of resin A, the conventional film-forming method makes film formation difficult, but according to the film-forming method of the present invention, the resin A can be made into a thin film while utilizing the properties of resin A. It becomes possible to form a film, and it is possible to form even a resin that has conventionally been difficult to form such as adhesiveness, crosslinkability, and adhesiveness.
[0051]
In addition, the above-mentioned resin A can be formed into various functional films by blending various additives as necessary, and functional films such as electrolyte membranes and various elastomers expected in the future are formed. As an effective method, it exhibits an excellent effect.
[Brief description of the drawings]
FIG. 1 is a schematic view of a film forming apparatus for explaining a resin film forming method of the present invention.
FIG. 2 is a side sectional view of a laminated film obtained by the resin film-forming method of the present invention.
[Explanation of symbols]
(I) ... kneading part (II) ... calendar forming part (III) ... easy peeling roll part 1 ... extruder 2 ... mixer 11 ... easy peeling roll 12 ... bank 21 ... calendar roll 22 ... calendar roll A ... resin AC ... Base film D ... Laminated film

Claims (7)

Resin A, which has been melt-plasticized using a kneading part (I) such as an extruder or a batch-type kneader, is applied to an easy-peeling roll part (III) composed of two opposing easy-peeling rolls that have been subjected to an easy-peeling process. The resin A is supplied to the calendar molding part (II) while controlling the continuous supply amount and supply width of the resin A by the clearance of the easy-peeling roll part (III), and the calendar molding part (II) At least one or more long base films are passed between the calender rolls , and the resin A is rolled between the calender rolls while the resin A is sandwiched between the base film to form the resin A. A method for forming a resin film characterized by   Forming the resin A and forming one or more types of the base film to form a single film of the resin A or a laminated film of two or more layers composed of the resin A and the base film. The method for forming a resin film according to claim 1. When rolling using the calendering part (II), the rolling is performed under calendering conditions of (melting point of resin A) <film forming temperature <(melting point of base film). deposition method 2 according to any one of the resin. The at least one substrate film among the one or more substrate films sandwiching the resin A is subjected to an easy peeling treatment on a surface in contact with the resin A. film forming method of the resin according to any one of 3. Wherein the resin A, film forming method of claim 1 set forth in any one resin乃4, characterized in that the film layer thickness in the range of 10 to 100 [mu] m. The resin A, film forming method of the resin according to any one of claims 1 to 5, characterized in that a non-crystalline thermoplastic resin having a glass transition temperature of 100 ° C. or less. The resin A is a low density polyethylene, a medium density polyethylene, a high density polyethylene, an ethylene-α olefin copolymer, a polypropylene, a polyolefin resin represented by a propylene-α olefin copolymer, or a modified product thereof, ethylene-α, β. Ethylene copolymer represented by unsaturated carboxylic acid, esterified product of ethylene-α, β unsaturated carboxylic acid, ionic cross-linked product of ethylene-α, β unsaturated carboxylic acid, ethylene-vinyl acetate copolymer or the like The modified resin, the copolymer polyester, the aliphatic polyester, the polyester resin represented by the polymer of oxyacid or its intramolecular cyclized product or the modified product thereof, the polyether or the polyether copolymer or the modified product thereof A method for forming a resin film according to any one of claims 1 to 6 .

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