JPH07125763A - Film with chuck - Google Patents
Film with chuckInfo
- Publication number
- JPH07125763A JPH07125763A JP5267677A JP26767793A JPH07125763A JP H07125763 A JPH07125763 A JP H07125763A JP 5267677 A JP5267677 A JP 5267677A JP 26767793 A JP26767793 A JP 26767793A JP H07125763 A JPH07125763 A JP H07125763A
- Authority
- JP
- Japan
- Prior art keywords
- chuck
- film
- density polyethylene
- bag
- low density
- 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
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 15
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 15
- 239000002344 surface layer Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 8
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 7
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- -1 polypropylene Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、開口部の再封鎖が可能
なチャック付き袋に好適に使用されるチャック付きフィ
ルムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zipper film which is suitable for use in a zipper bag whose opening can be resealed.
【０００２】[0002]
【従来の技術】従来、手軽に開口部が再封鎖できる袋と
して合成樹脂製のチャック付き袋が広く利用されてい
る。このチャック付き袋は（１）基材フィルムとチャッ
クテープを別々に製造した後、基材フィルムにチャック
テープを接着して得られるチャック付きフィルムを製袋
する方法、（２）押出機からチャック部を押し出して基
材フィルム上に熱融着させ、これを製袋する方法、
（３）押出機のダイスに雄型及び雌型のチャックに相当
する切り込みを設けてチャック付きフィルムを一体成形
した後、製袋する方法のうちのいずれかの方法によって
製造するのが一般的であった。2. Description of the Related Art Conventionally, a zipper bag made of synthetic resin has been widely used as a bag whose opening can be easily resealed. This bag with a zipper is (1) a method of manufacturing a bag with a zipper film obtained by separately manufacturing a base film and a zipper tape, and then adhering the zipper tape to the base film, (2) using an extruder to a chuck part A method of extruding and heat-sealing the base material film to make a bag,
(3) Generally, the extruder die is provided with cuts corresponding to male and female chucks to integrally form a film with a chuck, and then the bag is manufactured by any one of the methods. there were.
【０００３】これらのうちでも（３）の方法は製造工程
が簡単で製造コストも低くできるという利点を有してい
るので、汎用のチャック付き袋の製造に適しているとさ
れている。ところが、従来の単一流路のダイス方式によ
ってチャック付きフィルムを製造した場合、チャック部
と基材フィルムが同一材質となることから次のような問
題が生じていた。すなわち、チャック部は繰り返し使用
するのに耐えられる適度な柔軟性と咬み合わせ具合を良
好にするための成形性と保形性が要求され、基材フィル
ムはシール特性、透明性、強靱性等の各種物理的性質が
要求されることが多く、チャック部と基材フィルムの要
求特性が相反する場合があった。Of these, the method (3) has the advantages that the manufacturing process is simple and the manufacturing cost can be reduced, and is therefore suitable for manufacturing a general-purpose zipper bag. However, when a film with a chuck is manufactured by a conventional single-flow-pass die method, the following problems occur because the chuck part and the base material film are made of the same material. That is, the chuck part is required to have appropriate flexibility to withstand repeated use and formability and shape retention property to improve the bite condition, and the base material film has sealing properties, transparency, toughness, etc. In many cases, various physical properties are required, and the required properties of the chuck part and the base film sometimes conflict with each other.
【０００４】このような、問題を解決する手段として、
ポリプロピレン樹脂によるチューブ状フィルムの内面に
該チューブ状フィルムより剛性率の低い樹脂により雄、
雌咬合チャック条を一体的に成形してなるチャック付き
チューブ状フィルム（特公昭５９−３３４０号公報）が
提案されている。しかしながら、このような方法によっ
ても上記問題の全てが解決されるにはいたっていなかっ
た。As a means for solving such a problem,
The inner surface of the tubular film made of polypropylene resin is made of a resin whose rigidity is lower than that of the tubular film.
A tubular film with a chuck formed by integrally molding a female bite chuck strip (Japanese Patent Publication No. 59-3340) is proposed. However, all of the above problems have not been solved even by such a method.
【０００５】[0005]
【本発明が解決しようとする課題】本発明は、上記問題
のうち、特に成形性及び保形性の良いチャック部とヒ−
トシ−ル性の良い袋部を有するチャック付き袋に適した
チャック付きフィルムを容易に低コストで提供すること
を目的とする。SUMMARY OF THE INVENTION Of the above problems, the present invention is concerned with a chuck portion and a heat which have particularly good moldability and shape retention.
An object of the present invention is to easily and inexpensively provide a zipper film suitable for a zipper bag having a bag part having good toe sealing property.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、押出成
形法によってチャック部と基材フィルムが一体成形され
たチャック付きフィルムにおいて、チャック部が低密度
ポリエチレンからなり、基材フィルムの少なくともチャ
ック部側の表面層が直鎖状低密度ポリエチレン又はそれ
と低密度ポリエチレンの混合物であることを特徴とする
チャック付きフィルムが提供される。According to the present invention, in a chucked film in which a chuck portion and a base material film are integrally molded by an extrusion molding method, the chuck portion is made of low density polyethylene and at least the chuck of the base material film is used. There is provided a zippered film characterized in that the surface layer on the side thereof is a linear low-density polyethylene or a mixture thereof with a low-density polyethylene.
【０００７】すなわち、チャック部には成形性と保形性
及び柔軟性に優れた低密度ポリエチレンを用い、基材フ
ィルムの少なくともチャック部側の表面層にはヒートシ
ール性と機械的強度に優れた直鎖状低密度ポリエチレン
又はそれと低密度ポリエチレンの混合物を使用すれば、
押出特性にも優れしかも上記問題が解決できることを見
いだし本発明に到達した。That is, low-density polyethylene excellent in moldability, shape-retaining property and flexibility is used for the chuck portion, and at least the surface layer on the chuck portion side of the substrate film has excellent heat sealability and mechanical strength. If linear low density polyethylene or a mixture of it and low density polyethylene is used,
The present invention has been accomplished by finding that the extrusion characteristics are excellent and the above problems can be solved.
【０００８】以下、本発明を具体的に説明する。本発明
のチャック付きフィルムは、チャック部と基材フィルム
から構成されている。チャック部は相互に咬合可能な雄
型プロフィルと雌型プロフィルから構成されており、雄
型プロフィルと雌型プロフィルはフィルムの進行方向に
対して平行にそれぞれ形成されている。なお、チャック
部に使用する低密度ポリエチレンとは密度が０．９１８
〜０．９２８g/cm3 の高圧法により製造されたポリエチ
レンを意味する。The present invention will be specifically described below. The film with a chuck of the present invention comprises a chuck portion and a base film. The chuck portion is composed of a male type profile and a female type profile that can be occluded with each other, and the male type profile and the female type profile are formed in parallel to the moving direction of the film. The low density polyethylene used for the chuck has a density of 0.918.
It means polyethylene produced by the high pressure method of ˜0.928 g / cm 3 .
【０００９】基材フィルムは単層フィルムであっても多
層フィルムであっても特に制限はないが、多層フィルム
である場合は少なくともチャック部側の表面層が直鎖状
低密度ポリエチレン又は直鎖状低密度ポリエチレンと低
密度ポリエチレンとの混合物からなるようにする必要が
ある。ここで、直鎖状低密度ポリエチレンはエチレンと
α−オレフィンの共重合物のうち密度が０．９０５〜
０．９４０g/cm3 のものを意味し、直鎖状低密度ポリエ
チレンと低密度ポリエチレンの混合比は重量比で１００
〜４０：０〜６０の範囲が好ましく、特に１００〜５
０：０〜５０の範囲が好ましい。また、チャック部側の
表面層以外の層は特に限定されないが、チャック部側の
表面層を成す樹脂と層間の接着性が良好なポリエチレン
系樹脂やポリプロピレン系樹脂等や、カスバリア−性を
付与することのできるナイロン系樹脂やエチレン−ビニ
ルアルコ−ル共重合体等が例示される。The base film is not particularly limited whether it is a single layer film or a multi-layer film, but in the case of a multi-layer film, at least the surface layer on the chuck side is linear low density polyethylene or linear. It should consist of a mixture of low density polyethylene and low density polyethylene. Here, the linear low-density polyethylene has a density of 0.905 to 0.5 among the copolymers of ethylene and α-olefin.
It means 0.940 g / cm 3 and the mixing ratio of linear low density polyethylene and low density polyethylene is 100 by weight.
To 40: 0 to 60 are preferable, and especially 100 to 5
The range of 0: 0 to 50 is preferable. Further, layers other than the surface layer on the chuck portion side are not particularly limited, but polyethylene resin or polypropylene resin, etc. having good adhesion between the resin forming the surface layer on the chuck portion side and the layer, and imparting a caus barrier property. Examples thereof include nylon resins and ethylene-vinyl alcohol copolymers.
【００１０】更に、上記樹脂には必要に応じて、帯電防
止剤、滑剤、アンチブロッキング剤、着色剤等の添加剤
を添加することも可能である。Further, if necessary, additives such as an antistatic agent, a lubricant, an anti-blocking agent and a coloring agent can be added to the above resin.
【００１１】このようなチャック付きフィルムは、例え
ば、チャック部用樹脂と基材フィルム用樹脂を別々の押
出機から雄型プロフィル及び雌型プロフィルの形状に適
合した切り込み有する環状ダイスを用い、該ダイスの切
り込み部及びスリット部にそれぞれ導入してインフレー
ション押出成形することによって製造することができ
る。Such a film with a chuck uses, for example, an annular die having a notch for resin for a chuck part and a resin for a base material film, which are formed in separate extruders and adapted to the shapes of a male profile and a female profile. It can be manufactured by introducing it into the notch and the slit and subjecting it to inflation extrusion molding.
【００１２】こうして得られたチャック付きフィルムの
雄型プロフィルと雌型プロフィルが相対するように折曲
げた後、三方もしくは両サイドをヒ−トシ−ルして再封
鎖可能なチャック付き袋を製造する。The zipper film thus obtained is bent so that the male profile and the female profile are opposed to each other, and three or both sides are heat-sealed to manufacture a resealable zipper bag. .
【００１３】[0013]
【作用及び効果】本発明のチャック付きフィルムは、チ
ャック部に低密度ポリエチレンを使用しているので成形
性と保形性及び柔軟性に優れており、直鎖状低密度ポリ
エチレンもしくはそれと低密度ポリエチレンの混合物が
シーラント層となるのでヒートシール性、シール強度の
よいチャック付き袋を製造することができる。また、こ
のようなフィルムの製造工程も簡単であるので低コスト
で高性能なチャック付き袋を提供することが可能となっ
た。FUNCTION AND EFFECT Since the chucked film of the present invention uses low-density polyethylene for the chuck portion, it has excellent moldability, shape-retaining property, and flexibility, and has a linear low-density polyethylene or low-density polyethylene and it. Since the mixture of (1) and (2) becomes a sealant layer, it is possible to manufacture a bag with a chuck having excellent heat-sealing property and sealing strength. Further, since the manufacturing process of such a film is simple, it is possible to provide a high-performance zipper bag at a low cost.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 木村 浩司 香川県丸亀市中津町1515番地 大倉工業株 式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Kimura 1515 Nakatsu-cho, Marugame-shi, Kagawa Okura Industrial Co., Ltd.
Claims (1)
ルムが一体成形されたチャック付きフィルムにおいて、
チャック部が低密度ポリエチレンからなり、基材フィル
ムの少なくともチャック部側の表面層が直鎖状低密度ポ
リエチレン又はそれと低密度ポリエチレンの混合物であ
ることを特徴とするチャック付きフィルム。1. A film with a chuck in which a chuck portion and a substrate film are integrally molded by an extrusion molding method,
A chucked film, wherein the chuck part is made of low-density polyethylene, and at least the surface layer on the chuck part side of the substrate film is linear low-density polyethylene or a mixture thereof with low-density polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5267677A JPH07125763A (en) | 1993-10-27 | 1993-10-27 | Film with chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5267677A JPH07125763A (en) | 1993-10-27 | 1993-10-27 | Film with chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07125763A true JPH07125763A (en) | 1995-05-16 |
Family
ID=17447998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5267677A Pending JPH07125763A (en) | 1993-10-27 | 1993-10-27 | Film with chuck |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07125763A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08156117A (en) * | 1994-12-12 | 1996-06-18 | Seisan Nipponsha Kk | Synthetic resin sheet with both end chucks |
| JPH11349009A (en) * | 1998-06-10 | 1999-12-21 | Itochu San Plus Kk | Fitting device and bag with fitting device |
-
1993
- 1993-10-27 JP JP5267677A patent/JPH07125763A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08156117A (en) * | 1994-12-12 | 1996-06-18 | Seisan Nipponsha Kk | Synthetic resin sheet with both end chucks |
| JPH11349009A (en) * | 1998-06-10 | 1999-12-21 | Itochu San Plus Kk | Fitting device and bag with fitting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20031218 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20031222 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040223 |