JP2001096678A - Heat-shrinkable film and production method therefor - Google Patents
Heat-shrinkable film and production method thereforInfo
- Publication number
- JP2001096678A JP2001096678A JP28218999A JP28218999A JP2001096678A JP 2001096678 A JP2001096678 A JP 2001096678A JP 28218999 A JP28218999 A JP 28218999A JP 28218999 A JP28218999 A JP 28218999A JP 2001096678 A JP2001096678 A JP 2001096678A
- Authority
- JP
- Japan
- Prior art keywords
- styrene
- layer
- butadiene
- copolymer
- film
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリスチレン系熱
収縮性チューブ状のフィルム及びその製造方法に関し、
例えば一般雑貨等の包装材料として用いる、加熱するこ
とにより容易に収縮し均一に被包装物に密着して包装す
る包装材料に関する。The present invention relates to a polystyrene-based heat-shrinkable tubular film and a method for producing the same.
For example, the present invention relates to a packaging material used as a packaging material for general miscellaneous goods, which is easily shrunk by heating and uniformly adhered to an object to be packaged.
【０００２】より詳しくは、二層のポリスチレン系熱収
縮性チューブから成り、性質の異なる二種のポリスチレ
ンすなわち第一層をスチレン−ブタジエン共重合体又は
スチレン−ブタジエン共重合体と他のスチレン系樹脂の
ポリマーブレンド、９５〜５wt%、第二層をスチレン−
ブタジエン−アクリル酸エステル系共重合体、又はスチ
レン−メタクリル酸メチル共重合樹脂又はスチレン−ブ
タジエン−メチルメタアクリレート共重合樹脂５〜９５
wt%の管状二層無延伸フィルムを共押出しにより製造
し、縦方向を１〜３倍、横方向を１〜５倍に延伸、製造
したフィルムに関するものである。More specifically, two kinds of polystyrene having different properties consisting of a two-layer polystyrene-based heat-shrinkable tube, that is, the first layer is composed of a styrene-butadiene copolymer or a styrene-butadiene copolymer and another styrene-based resin. 95-5 wt% of a polymer blend of styrene-
Butadiene-acrylate copolymer, styrene-methyl methacrylate copolymer resin or styrene-butadiene-methyl methacrylate copolymer resin 5-95
The present invention relates to a film produced by co-extrusion of a wt% tubular two-layer unstretched film and stretching the film in a longitudinal direction 1 to 3 times and in a transverse direction 1 to 5 times.
【０００３】[0003]
【従来の技術】従来熱収縮フィルムとしては、一般的に
熱収縮によってカールを発生させずに密着包装するた
め、又、中間層を設けてコストダウンを図り、２種の材
料を組み合わせることによって単層にない相乗効果の特
性を持たせるため、オレフィン系の２種３層のフィルム
が用いられていた。 また、収縮フィルムとして提供さ
れている単層のフィルムとしては、塩化ビニル(PVC)
系、ポリプロピレン(PP)系のフィルムが主流であった。2. Description of the Related Art Conventionally, a conventional heat-shrinkable film is generally used for tightly packing without generating curl due to heat shrinkage. Olefin-based two-layer and three-layer films have been used in order to impart synergistic properties that are not present in the layers. Also, as a single layer film provided as a shrink film, vinyl chloride (PVC)
And polypropylene (PP) based films were the mainstream.
【０００４】また、２種多層化しようとすることも試み
られていた。Attempts have also been made to achieve two types of multilayers.
【０００５】[0005]
【発明が解決しようとする課題】上記単層フィルムとし
ての塩化ビニルフィルムは、近年焼却廃棄時の公害発生
などの問題から使用が制限される傾向にある。In recent years, the use of vinyl chloride films as single-layer films has tended to be limited due to problems such as the occurrence of pollution during incineration disposal.
【０００６】また、単層フィルムとして塩化ビニルに代
替するものとしては、ポリスチレンフィルムが考えられ
るが、一般に単層のポリスチレンフィルムは自然収縮が
大きく成形時の安定度もあまり良くなく、また、横収縮
率が４０％以上、縦収縮率３０％以下の製品は製造が困
難であった。このため、収縮応力が弱く、いわばピッタ
リとフィットした密着包装が得られないと言う問題があ
った。すなわち、縦横で熱収縮率を不均衡にすることが
できなかった。A polystyrene film may be considered as a substitute for vinyl chloride as a single-layer film. However, a single-layer polystyrene film generally has a large natural shrinkage, is not so stable at the time of molding, and has a low lateral shrinkage. A product having a ratio of 40% or more and a longitudinal shrinkage of 30% or less was difficult to manufacture. For this reason, there is a problem that the shrinkage stress is weak, and a so-called tightly fitted package cannot be obtained. That is, the heat shrinkage rate could not be imbalanced in the vertical and horizontal directions.
【０００７】また、上記２種多層化フィルムは、収縮率
が異なるフィルムの積層となるため熱収縮包装時カール
が大きくなると言う問題があった。従って、２種２層フ
ィルムにも同様の課題が残されていた。In addition, the above-mentioned two types of multilayer films have a problem that curling becomes large at the time of heat shrink wrapping because films having different shrinkage ratios are laminated. Therefore, a similar problem remains in the two-type two-layer film.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記課題を解
決し、自然収縮が少ない、収縮特性が良好で密着性に優
れた低廉な熱収縮フィルムを提供することを目的とする
もので、本発明熱収縮性フィルムは、第一層をスチレン
−ブタジエン共重合体又はスチレン−ブタジエン共重合
体と他のスチレン系樹脂のポリマーブレンド９５〜５wt
%、第二層をスチレン−ブタジエン−アクリル酸エステ
ル系共重合体共重合体５〜９５wt%から成り、縦方向に
１〜３倍、横方向に１〜５倍に延伸して成ることを特徴
とする。また、その製造方法は、第一層をスチレン−ブ
タジエン共重合体９５〜５wt%、第二層をスチレン−ブ
タジエン−アクリル酸エステル系共重合体又はスチレン
−メタクリル酸メチル共重合樹脂又はスチレン−ブタジ
エン−メチルメタアクリレート共重合樹脂５〜９５wt%
の管状二層無延伸フィルムを共押出しし、縦方向を１〜
３倍、横方向を１〜５倍に延伸加工することを特徴とす
る。SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems and to provide a low-cost heat-shrinkable film having less natural shrinkage, good shrinkage characteristics and excellent adhesion. In the heat-shrinkable film of the present invention, the first layer is a styrene-butadiene copolymer or a polymer blend of a styrene-butadiene copolymer and another styrene-based resin in an amount of 95 to 5 wt.
%, Characterized in that the second layer is composed of 5-95 wt% of a styrene-butadiene-acrylate copolymer copolymer and stretched 1-3 times in the longitudinal direction and 1-5 times in the horizontal direction. And Further, the production method is such that the first layer is composed of 95 to 5% by weight of a styrene-butadiene copolymer, and the second layer is composed of a styrene-butadiene-acrylate copolymer or a styrene-methyl methacrylate copolymer resin or styrene-butadiene. -Methyl methacrylate copolymer resin 5-95wt%
Co-extruded a tubular two-layer unstretched film of
It is characterized in that it is stretched three times and in the lateral direction 1 to 5 times.
【０００９】[0009]
【発明の実施の形態】本願発明の実施の形態は、第一層
にスチレン−ブタジエン−ブロック共重合体、スチレン
−ブタジエン共重合体と他のスチレン系樹脂のポリマー
ブレンドを９５〜５wt%、好ましくは９５〜５０wt%、第
二層にスチレン−ブタジエン−アクリル酸エステル系共
重合体又はスチレン−メタクリル酸メチル共重合樹脂(M
BS）樹脂又はスチレン−ブタジエン−メチルメタアクリ
レート共重合樹脂(MBS樹脂）を５〜９５wt%、好ましく
は５〜５０wt%の管状二層無延伸フィルムを、これに限
定されるわけではないが、チューブラー法により共押出
成形により成形し、縦方向を１〜３倍好ましくは１．１
〜１．７倍、横方向を１〜５倍、好ましくは、１．１〜
２倍に二軸延伸する。BEST MODE FOR CARRYING OUT THE INVENTION According to an embodiment of the present invention, the first layer contains a styrene-butadiene-block copolymer, a polymer blend of a styrene-butadiene copolymer and another styrene-based resin in an amount of 95 to 5% by weight, preferably Is 95 to 50% by weight, and a styrene-butadiene-acrylate copolymer or a styrene-methyl methacrylate copolymer resin (M
BS) 5 to 95 wt%, preferably 5 to 50 wt% of a tubular two-layer unstretched film of a resin or a styrene-butadiene-methyl methacrylate copolymer resin (MBS resin), but is not limited thereto. By a co-extrusion molding method, and the longitudinal direction is 1-3 times, preferably 1.1 times.
~ 1.7 times, horizontal direction 1 ~ 5 times, preferably 1.1 ~
It is biaxially stretched twice.
【００１０】〔実施例１〕共押出二層インフレーション
フィルム製造装置を用い、外層となる第一層にスチレン
−ブタジエンブロック共重合体を５０wt%、内層となる
第二層にスチレン−ブタジエン−アクリル酸エステル系
共重合体を５０wt%の管状二層無延伸フィルムを成形温
度１６０〜２００℃で成形し、それを８０〜１５０℃で
加熱、縦方向１．１倍、横方向２倍に１０m/minで延伸
した結果、厚さ４０μ、幅１２０mmのフィルムを製造し
た。Example 1 Using a co-extruded two-layer blown film production apparatus, a styrene-butadiene block copolymer was used as an outer layer in a first layer of 50 wt%, and a styrene-butadiene-acrylic acid was used as an inner layer in a second layer. A 50 wt% tubular two-layer unstretched film of an ester copolymer is molded at a molding temperature of 160 to 200 ° C, and heated at 80 to 150 ° C. As a result, a film having a thickness of 40 μ and a width of 120 mm was produced.
【００１１】〔実施例２〕共押出二層インフレーション
フィルム製造装置を用い、第一層にスチレン−ブタジエ
ンブロック共重合体を７０wt%、第二層にスチレン−ブ
タジエン−アクリル酸エステル系共重合体を３０wt%の
管状二層無延伸フィルムを成形温度１６０〜２００℃で
成形し、それを８０〜１５０℃で加熱、縦方向１．１
倍、横方向２倍に１０m/minで延伸した結果、厚さ４０
μ、幅１２０mmのフィルムを製造した。Example 2 Using a co-extruded two-layer blown film manufacturing apparatus, a styrene-butadiene block copolymer was used in the first layer at 70 wt% and a styrene-butadiene-acrylate copolymer was used in the second layer. A 30 wt% tubular two-layer unstretched film is formed at a forming temperature of 160 to 200 ° C. and heated at 80 to 150 ° C. in a longitudinal direction of 1.1.
As a result of stretching at 10 m / min twice in the transverse direction and twice in the transverse direction, the thickness was 40
μ, a film having a width of 120 mm was produced.
【００１２】〔実施例３〕共押出二層インフレーション
フィルム製造装置を用い、第一層にスチレン−ブタジエ
ンブロック共重合体を８０wt%、第二層にスチレン−ブ
タジエン−アクリル酸エステル系共重合体を２０wt%の
管状二層無延伸フィルムを成形温度１６０〜２００℃で
成形し、それを８０〜１５０℃で加熱、縦方向１．１
倍、横方向２倍に１０m/minで延伸した結果、厚さ４０
μ、幅１２０mmのフィルムを製造した。Example 3 Using a co-extruded two-layer blown film manufacturing apparatus, a first layer was made of 80% by weight of a styrene-butadiene block copolymer, and a second layer was made of a styrene-butadiene-acrylate copolymer. A 20 wt% tubular two-layer unstretched film is formed at a forming temperature of 160 to 200 ° C., and heated at 80 to 150 ° C. in a longitudinal direction of 1.1.
As a result of stretching at 10 m / min twice in the transverse direction and twice in the transverse direction, the thickness was 40
μ, a film having a width of 120 mm was produced.
【００１３】〔実施例４〕共押出二層インフレーション
フィルム製造装置を用い、第一層にスチレン−ブタジエ
ンブロック共重合体を９０wt%、第二層にスチレン−ブ
タジエン−アクリル酸エステル系共重合体を１０wt%の
管状二層無延伸フィルムを成形温度１６０〜２００℃で
成形し、それを８０〜１５０℃で加熱、縦方向１．１
倍、横方向２倍に１０m/minで延伸した結果、厚さ４０
μ、幅１２０mmのフィルムを製造した。Example 4 A styrene-butadiene block copolymer was used for the first layer and a styrene-butadiene-acrylate copolymer was used for the second layer using a co-extruded two-layer blown film manufacturing apparatus. A 10 wt% tubular two-layer unstretched film is formed at a forming temperature of 160 to 200 ° C., and heated at 80 to 150 ° C. in a longitudinal direction of 1.1.
As a result of stretching at 10 m / min twice in the transverse direction and twice in the transverse direction, the thickness was 40
μ, a film having a width of 120 mm was produced.
【００１４】上述実施例では、チューブラー法により製
造するものを例示したが、テンター法などにより製造す
ることもできる。In the above-described embodiment, an example of manufacturing by a tubular method has been described. However, it can be manufactured by a tenter method or the like.
【００１５】〔比較例〕単層ポリスチレン系熱収縮チュ
ーブ及び上記実施例３における本願発明フィルムの比較
を以下に示す。Comparative Example A comparison between the single-layer polystyrene-based heat-shrinkable tube and the film of the present invention in Example 3 is shown below.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【発明の効果】単層のフィルムＡ及びＢは、横収縮を強
くすることが出来ず、また縦収縮を弱くする事も出来な
い。このために、密着包装の仕上がりに問題があったが
本願発明は収縮率を幅広く任意に採用でき、密着包装の
仕上がりが、大幅に向上した。また、二種二層にするこ
とにより、透明性の向上が図れ、自然収縮も少なくなっ
た。The single-layer films A and B cannot increase the lateral shrinkage and cannot reduce the longitudinal shrinkage. For this reason, there was a problem in the finish of the contact packaging, but the present invention could employ a wide range of shrinkage ratios arbitrarily, and the finish of the contact packaging was greatly improved. Further, by using two types of two layers, transparency was improved, and natural shrinkage was reduced.
【００１８】さらに、ポリスチレン系の二種二層共押出
成形であるため、二層フィルム特有のカールも起きにく
くなった。Furthermore, since the polystyrene-based two-layer two-layer coextrusion molding is used, the curl peculiar to the two-layer film hardly occurs.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｌ 9:00 Ｂ２９Ｌ 9:00 (72)発明者 清水 正広 栃木県那須郡西那須野町西三島４−183鳥 ヶ森パークハイツＥ−103 (72)発明者 渡部 秀樹 千葉県市原市玉井南海岸６ (72)発明者 山田 毅 千葉県市原市玉井南海岸６ Ｆターム(参考） 3E086 AB03 AD16 BA04 BA15 BA33 BB67 CA35 4F100 AK12A AK12B AK12J AK25B AK25J AK29B AK29J AK73A AK80B AL02 AL05A BA02 DA02 EH202 EJ382 GB17 JA04 JK06 JN01 JN21 4F210 AA13E AA13K AA21E AG03 AH54 QA05 QC07 QG02 QG15 QG17 QK01 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification FI FI Theme Court ゛ (Reference) B29L 9:00 B29L 9:00 (72) Inventor Masahiro Shimizu 4-183 Nishimishima, Nishinasuno-cho, Nasu-gun, Tochigi Prefecture Torigamori Park Heights E-103 (72) Inventor Hideki Watanabe 6 Tamai South Coast, Ichihara City, Chiba Prefecture (72) Inventor Takeshi Takeshi 6 Tamai South Coast, Ichihara City, Chiba Prefecture F Term (Reference) 3E086 AB03 AD16 BA04 BA15 BA33 BB67 CA35 4F100 AK12A AK12B AK12J AK25B AK25J AK29B AK29J AK73A AK80B AL02 AL05A BA02 DA02 EH202 EJ382 GB17 JA04 JK06 JN01 JN21 4F210 AA13E AA13K AA21E AG03 AH54 QA05 Q07 Q17 Q02
Claims (2)
又はスチレン−ブタジエン共重合体と他のスチレン系樹
脂のポリマーブレンド９５〜５wt%、第二層をスチレン
−ブタジエン−アクリル酸エステル系共重合体又はスチ
レン−メタクリル酸メチル共重合樹脂又はスチレン−ブ
タジエン−メチルメタアクリレート共重合樹脂５〜９５
wt%から成り、縦方向に１〜３倍、横方向に１〜５倍に
延伸して成る熱収縮性フィルム。A first layer is a styrene-butadiene copolymer or a polymer blend of a styrene-butadiene copolymer and another styrene resin at 95 to 5% by weight, and a second layer is a styrene-butadiene-acrylate copolymer copolymer. Copolymer or styrene-methyl methacrylate copolymer resin or styrene-butadiene-methyl methacrylate copolymer resin 5-95
A heat-shrinkable film composed of wt% and stretched 1 to 3 times in the machine direction and 1 to 5 times in the transverse direction.
はスチレン−ブタジエン共重合体と他のスチレン系樹脂
のポリマーブレンド９５〜５wt%、第二層をスチレン−
ブタジエン−アクリル酸エステル系共重合体又はスチレ
ン−メタクリル酸メチル共重合樹脂又はスチレン−ブタ
ジエン−メチルメタアクリレート共重合樹脂５〜９５wt
%の管状二層無延伸フィルムを共押出しにより製造し、
縦方向を１〜３倍、横方向を１〜５倍に延伸加工するこ
とを特徴とする熱収縮フィルムの製造方法。2. A method according to claim 1, wherein the first layer comprises 95 to 5% by weight of a styrene-butadiene copolymer or a polymer blend of a styrene-butadiene copolymer and another styrene resin, and the second layer comprises a styrene-butadiene copolymer.
Butadiene-acrylate copolymer or styrene-methyl methacrylate copolymer resin or styrene-butadiene-methyl methacrylate copolymer resin 5-95 wt.
% Of tubular two-layer unstretched film by co-extrusion,
A method for producing a heat-shrinkable film, comprising stretching the film in a longitudinal direction 1 to 3 times and in a transverse direction 1 to 5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28218999A JP2001096678A (en) | 1999-10-01 | 1999-10-01 | Heat-shrinkable film and production method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28218999A JP2001096678A (en) | 1999-10-01 | 1999-10-01 | Heat-shrinkable film and production method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001096678A true JP2001096678A (en) | 2001-04-10 |
Family
ID=17649244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28218999A Pending JP2001096678A (en) | 1999-10-01 | 1999-10-01 | Heat-shrinkable film and production method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001096678A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033968A (en) * | 2001-07-26 | 2003-02-04 | Denki Kagaku Kogyo Kk | Heat shrinkable film |
| JP2003103720A (en) * | 2001-09-28 | 2003-04-09 | C I Kasei Co Ltd | Polystyrenic heat-shrinkable film and method for manufacturing the same |
| US7473473B2 (en) | 2004-12-01 | 2009-01-06 | Cryovac, Inc. | Tear resistant shrink film |
| US7999356B2 (en) | 2008-09-25 | 2011-08-16 | Kabushiki Kaisha Toshiba | Composition for film formation, insulating film, semiconductor device, and process for producing the semiconductor device |
-
1999
- 1999-10-01 JP JP28218999A patent/JP2001096678A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033968A (en) * | 2001-07-26 | 2003-02-04 | Denki Kagaku Kogyo Kk | Heat shrinkable film |
| JP2003103720A (en) * | 2001-09-28 | 2003-04-09 | C I Kasei Co Ltd | Polystyrenic heat-shrinkable film and method for manufacturing the same |
| US7473473B2 (en) | 2004-12-01 | 2009-01-06 | Cryovac, Inc. | Tear resistant shrink film |
| US7999356B2 (en) | 2008-09-25 | 2011-08-16 | Kabushiki Kaisha Toshiba | Composition for film formation, insulating film, semiconductor device, and process for producing the semiconductor device |
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