JPS6138937B2 - - Google Patents
Info
- Publication number
- JPS6138937B2 JPS6138937B2 JP18563580A JP18563580A JPS6138937B2 JP S6138937 B2 JPS6138937 B2 JP S6138937B2 JP 18563580 A JP18563580 A JP 18563580A JP 18563580 A JP18563580 A JP 18563580A JP S6138937 B2 JPS6138937 B2 JP S6138937B2
- Authority
- JP
- Japan
- Prior art keywords
- low
- temperature plasma
- gas
- plasma treatment
- heat
- 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
Links
- 239000004743 Polypropylene Substances 0.000 claims description 23
- -1 polypropylene Polymers 0.000 claims description 23
- 229920001155 polypropylene Polymers 0.000 claims description 23
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 claims description 22
- 238000009832 plasma treatment Methods 0.000 claims description 16
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000010408 film Substances 0.000 description 26
- 239000007789 gas Substances 0.000 description 18
- 238000007789 sealing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000000178 monomer Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Treatments Of Macromolecular Shaped Articles (AREA)
Description
本発明はヒートシール性の改良されたポリプロ
ピレンフイルムに関するものである。
ポリプロピレンフイルムは耐溶剤性、耐熱性、
耐酸性に優れた特性を有しており、延伸されたフ
イルムはさらに強度的性質や透明性に優れた特性
を有しているが、ヒートシール性に劣るという欠
点がある。
従来、ヒートシール性に劣るフイルムにヒート
シール性を付与せしめる方法としては、フイルム
表面の片面もしくは両面にヒートシール性の良い
樹脂をラミネートあるいはコーテイングする方法
などが一般に採用されているが、塗布、乾燥など
の処理工程が必要となり価格的には高価となる。
したがつて、本発明者らはポリプロピレンフイ
ルムのヒートシール特性を簡単に改良し得る方法
について鋭意研究の結果、ポリプロピレンフイル
ムを特定のモノマーガスの存在下に２段階の処理
を行うことによりヒートシール特性を著しく改良
出来ることを見出し、本発明を完成させるに至つ
た。即ち、本発明はポリプロピレンフイルムの少
くとも一面をアクリロニトリルガスのガスで低温
プラズマ処理したのち、次いでブテン−１のガス
で低温プラズマ処理することを特徴とする更にヒ
ートシール特性が改良されたポリプロピレンフイ
ルムの製造方法である。
従来、ポリマーの表面を各種モノマーガスで低
温プラズマ処理することによつて薄膜を形成し
て、ガス透過性を付与することが報告されている
（「化学の領域」増刊11号（1976）59〜77頁）。し
かしながら、上記の文献には多数のモノマーのう
ちブテン−１のプラズマ処理によつて、ポリマー
フイルムのヒートシール性を改良されることにつ
いて何ら示唆する記載もない。因みに、後記の比
較例に示すように、ポリプロピレンフイルムをア
クリロニトリルガスで低温プラズマ処理しても、
ヒートシール性は殆んど得られない。
しかるに、本発明の実施例に示すように、ポリ
プロピレンフイルムを予めアクリロニトリルガス
の存在下に低温プラズマ処理したのち、次いでブ
テン−１ガスの存在下に低温プラズマ処理するこ
とによつて、100℃以下のヒートシール温度でも
充分なヒートシール強度が得られることは、驚く
べき効果である。特にポリプロピレンフイルム
を、まずアクリロニトリルガス下にプラズマ処理
し、次いでブテン−１ガス下に処理することによ
りヒートシール性が改良される理由は明らかでは
ないが、ヒートシール性を付与せしめるブテン−
１ガスをポリプロピレンフイルム表面に直接反応
させるよりも、反応性に富んだアクリロニトリル
ガスをまずポリプロピレンフイルムに反応させ、
アクリロニトリルの固有するCN基にブテン−１
ガスが反応し、ブテン−１ガスの付加反応性が向
上するものと考えられる。
また上記の如く、ポリプロピレンフイルムに対
してアクリロニトリルの低温プラズマによる反応
は、表面の極く薄い層において起るために、本発
明においてはポリプロピレンの固有する特性を何
ら損うことがない。
本発明においてポリプロピレンとはポリプロピ
レンホモポリマー、エチレン−プロピレン共重合
体、ブテン−１−プロピレン共重合体等のプロピ
レンを主成分とした共重合変性物を総括して称
し、これらの１種もしくは２種以上の混合物も使
用される。また該ポリプロピレンには酸化防止
剤、滑剤、帯電防止剤等を少量配合したものであ
つてもさしつかえない。さらにまた、ポリプロピ
レンフイルムとは上記ポリプロピレン樹脂からな
るフイルムであればよく、一般に一軸延伸あるい
は二軸延伸法によりフイルム状に成形された物が
使用できる。
本発明において低温プラズマとは、減圧下にお
いて比較的低温の反応ガス雰囲気で電気的放電に
よつて生成する励起分子がフイルム表面に付加反
応する現象であり、公知の低温プラズマ発生装置
を使用することができる。したがつて、本発明に
おいて、ポリプロピレンフイルムを低温プラズマ
処理するには、該フイルムを低温プラズマ発生装
置に供給し、装置内で低温プラズマ化された気体
に曝露させることにより行なわれる。
本発明における低温プラズマ処理の条件は、使
用するガスモノマー等により適宜定められる。ブ
テン−１だけを用いて低温プラズマ処理する場合
には、反応ガス圧力が一般に0.5〜1.5Torr、好ま
しくは0.4〜1.4Torrで、例えば出力150ワツトの
とき反応時間を１〜4000秒、特に100〜500秒程度
にすればよい。また、予めアクリロニトリルを用
いて低温プラズマ処理する場合には、一般に0.1
〜2.0Torrで、例えば出力150ワツトのとき反応時
間を0.1〜600秒、特に100〜400秒程度にし、次い
でブテン−１を用いて低温プラズマ処理する場合
には一般に0.5〜1.0Torrで、例えば出力150ワツ
トのとき反応時間を１〜400秒、特に100〜500秒
程度にすればよい。
上記した如く、本発明によれば簡便な方法によ
つて、ポリプロピレンフイルムの特性を損うこと
なく、低温でも充分な強度のヒートシールが得ら
れる。
以下に、実施例と比較例を示すが、本発明はこ
れら実施例によつて何ら限定されるものではな
い。
実施例 １
結晶性ポリプロピレンを通常の溶融押出機によ
り溶融し、Ｔ型ダイ等より押出し厚さ0.5mmのシ
ートを得、常法テンター法により二軸延伸された
厚さ80μのポリプロピレンフイルムを得た。次い
で該フイルムを第１表にかかげたような各種の条
件下に、先ずアクリロニトリルガスで処理し、次
いでブテン−１ガスでの処理を低温プラズマ発生
装置を用いて処理した。
得られたフイルムのヒートシール強度を測定し
た結果を、第１表の右欄に示す。なお、ヒートシ
ール強度は幅10mm、長さ70mmの試料片の処理面同
志を２枚重ねてヒートバー式ヒートシール試験機
により各種の温度で、圧力１Kg／cm2、１秒間ヒー
トシールし、オートグラフにより剥離強度を測定
した。
The present invention relates to a polypropylene film with improved heat sealability. Polypropylene film is solvent resistant, heat resistant,
It has excellent acid resistance, and the stretched film also has excellent strength and transparency, but it has a drawback of poor heat sealability. Conventionally, the method of imparting heat-sealability to films with poor heat-sealability has generally been to laminate or coat one or both sides of the film surface with a resin that has good heat-sealability. These processing steps are required and are expensive. Therefore, as a result of intensive research into a method for easily improving the heat-sealing properties of polypropylene film, the present inventors have found that the heat-sealing properties can be improved by subjecting polypropylene film to a two-step treatment in the presence of a specific monomer gas. The present inventors have discovered that this can be significantly improved, and have completed the present invention. That is, the present invention provides a polypropylene film with further improved heat-sealing characteristics, characterized in that at least one side of the polypropylene film is subjected to low-temperature plasma treatment with acrylonitrile gas and then low-temperature plasma treatment with butene-1 gas. This is the manufacturing method. Conventionally, it has been reported that gas permeability is imparted by forming a thin film by subjecting the surface of a polymer to low-temperature plasma treatment with various monomer gases. 77 pages). However, the above-mentioned literature does not contain any suggestion that the heat sealability of a polymer film can be improved by plasma treatment of butene-1 among many monomers. Incidentally, as shown in the comparative example below, even if a polypropylene film is subjected to low-temperature plasma treatment with acrylonitrile gas,
Almost no heat sealability can be obtained. However, as shown in the examples of the present invention, a polypropylene film is subjected to low-temperature plasma treatment in the presence of acrylonitrile gas and then low-temperature plasma treatment in the presence of butene-1 gas. It is a surprising effect that sufficient heat-sealing strength can be obtained even at heat-sealing temperatures. In particular, it is not clear why heat-sealability is improved by first plasma-treating a polypropylene film under acrylonitrile gas and then treating it under butene-1 gas.
1.Rather than reacting the gas directly on the polypropylene film surface, highly reactive acrylonitrile gas is first reacted on the polypropylene film.
Butene-1 in the inherent CN group of acrylonitrile
It is thought that the gases react and the addition reactivity of butene-1 gas is improved. Furthermore, as mentioned above, since the reaction of acrylonitrile with low-temperature plasma on the polypropylene film occurs in an extremely thin layer on the surface, the inherent properties of polypropylene are not impaired in the present invention. In the present invention, polypropylene collectively refers to modified copolymers containing propylene as a main component, such as polypropylene homopolymer, ethylene-propylene copolymer, butene-1-propylene copolymer, etc., and one or two of these Mixtures of the above may also be used. Further, the polypropylene may be blended with a small amount of an antioxidant, a lubricant, an antistatic agent, etc. Furthermore, the polypropylene film may be any film made of the above-mentioned polypropylene resin, and generally a film formed into a film shape by uniaxial stretching or biaxial stretching can be used. In the present invention, low-temperature plasma is a phenomenon in which excited molecules generated by electrical discharge in a relatively low-temperature reaction gas atmosphere under reduced pressure undergo an addition reaction on the film surface, and a known low-temperature plasma generator can be used. I can do it. Therefore, in the present invention, low-temperature plasma treatment of a polypropylene film is carried out by supplying the film to a low-temperature plasma generator and exposing it to gas that has been turned into low-temperature plasma within the device. The conditions for the low-temperature plasma treatment in the present invention are appropriately determined depending on the gas monomer and the like used. In the case of low-temperature plasma treatment using only butene-1, the reaction gas pressure is generally 0.5 to 1.5 Torr, preferably 0.4 to 1.4 Torr, and the reaction time is 1 to 4000 seconds, particularly 100 to 4000 seconds, when the output is 150 W. It should be about 500 seconds. In addition, when performing low-temperature plasma treatment using acrylonitrile in advance, generally 0.1
~2.0 Torr, for example, when the output is 150 W, the reaction time is 0.1 to 600 seconds, especially about 100 to 400 seconds, and then low temperature plasma treatment using butene-1 is generally performed at 0.5 to 1.0 Torr, for example, the output At 150 watts, the reaction time may be set to about 1 to 400 seconds, especially about 100 to 500 seconds. As described above, according to the present invention, a heat seal having sufficient strength even at low temperatures can be obtained by a simple method without impairing the properties of the polypropylene film. Examples and comparative examples are shown below, but the present invention is not limited to these examples in any way. Example 1 Crystalline polypropylene was melted using a normal melt extruder, extruded through a T-shaped die, etc. to obtain a sheet with a thickness of 0.5 mm, and biaxially stretched using a conventional tenter method to obtain a polypropylene film with a thickness of 80 μm. . The film was then treated under various conditions as listed in Table 1, first with acrylonitrile gas and then with butene-1 gas using a low temperature plasma generator. The results of measuring the heat seal strength of the obtained film are shown in the right column of Table 1. The heat-sealing strength was determined by stacking the treated surfaces of two sample pieces with a width of 10 mm and a length of 70 mm and heat-sealing them using a heat bar type heat-sealing tester at various temperatures for 1 second at a pressure of 1 Kg/cm 2 and using an autograph. The peel strength was measured using the following method.
【表】【table】
Claims (1)
クリロニトリルガスで低温プラズマ処理したの
ち、次いでブテン−１ガスで低温プラズマ処理す
ることを特徴とするヒートシール性が改良された
ポリプロピレンフイルムの製造方法。 ２ 0.1〜2.0Torrの減圧下にアクリロニトリルガ
スで低温プラズマ処理し、0.5〜1.0Torrの減圧下
にブテン−１ガスで低温プラズマ処理する特許請
求の範囲第１項に記載の製造方法。[Scope of Claims] 1. A method for producing a polypropylene film with improved heat-sealability, which comprises subjecting at least one side of the polypropylene film to low-temperature plasma treatment with acrylonitrile gas and then low-temperature plasma treatment with butene-1 gas. . 2. The manufacturing method according to claim 1, wherein low temperature plasma treatment is performed with acrylonitrile gas under a reduced pressure of 0.1 to 2.0 Torr, and low temperature plasma treatment is performed with butene-1 gas under a reduced pressure of 0.5 to 1.0 Torr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18563580A JPS57111329A (en) | 1980-12-29 | 1980-12-29 | Production of polypropylene film having improved heat sealability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18563580A JPS57111329A (en) | 1980-12-29 | 1980-12-29 | Production of polypropylene film having improved heat sealability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57111329A JPS57111329A (en) | 1982-07-10 |
| JPS6138937B2 true JPS6138937B2 (en) | 1986-09-01 |
Family
ID=16174215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18563580A Granted JPS57111329A (en) | 1980-12-29 | 1980-12-29 | Production of polypropylene film having improved heat sealability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57111329A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015172099A (en) * | 2014-02-21 | 2015-10-01 | Ａｐｃ株式会社 | Polypropylene-based film, production method thereof, and laminate |
-
1980
- 1980-12-29 JP JP18563580A patent/JPS57111329A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57111329A (en) | 1982-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3620825A (en) | Extrusion-coated, biaxially oriented polypropylene film having improved adhesion characteristics | |
| AU718552B2 (en) | Enhanced barrier vacuum metallized films | |
| US4891173A (en) | Process for producing a crosslinked and oriented polyethylene film | |
| EP0369705A2 (en) | Heat-sealable crosslinked oriented polyethylene film and production thereof | |
| EP0127149A2 (en) | A method for the treatment of a thermoplastic resin | |
| GB2116989A (en) | Block copolymers of propylene butene-1 and optionally ethylene | |
| JPS6138937B2 (en) | ||
| JPS6147167B2 (en) | ||
| EP4169716A1 (en) | Biaxially-oriented polypropylene film | |
| JPH07329258A (en) | Biaxially oriented polypropylene composite film and metal oxide vapor-deposited biaxially oriented polypropylene composite film | |
| JPS5841178B2 (en) | Method for manufacturing composite film | |
| JPH0531803A (en) | Manufacture of antistatic polyethylene crosslinking oriented film | |
| JPS6138934B2 (en) | ||
| JPS5850592B2 (en) | metal-deposited film | |
| JPH0269237A (en) | Multilayer stretched polypropylene film | |
| JP7276567B2 (en) | biaxially oriented polypropylene film | |
| JP2555820B2 (en) | Thermoplastic resin film having vapor deposition layer | |
| JPS6185458A (en) | Propylene copolymer composition for film | |
| JPH0217873Y2 (en) | ||
| KR100378009B1 (en) | Method for producing multi-layered separator | |
| JPS59182733A (en) | Composite film for moistureproof molding | |
| JPH0511031B2 (en) | ||
| EP4173799A1 (en) | Biaxially-oriented polypropylene film | |
| JPH038658B2 (en) | ||
| JPH038659B2 (en) |