JP3294002B2 - Bag with zipper - Google Patents
Bag with zipperInfo
- Publication number
- JP3294002B2 JP3294002B2 JP12719694A JP12719694A JP3294002B2 JP 3294002 B2 JP3294002 B2 JP 3294002B2 JP 12719694 A JP12719694 A JP 12719694A JP 12719694 A JP12719694 A JP 12719694A JP 3294002 B2 JP3294002 B2 JP 3294002B2
- Authority
- JP
- Japan
- Prior art keywords
- bag
- zipper
- chuck
- density polyethylene
- emma
- 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 - Fee Related
Links
Landscapes
- Bag Frames (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、しなやかな風合いを持
ちさらに開口部の再封鎖が可能なチャック付き袋に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag with a zipper having a supple feel and capable of resealing an opening.
【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なが
ら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、これを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, bags with synthetic resin zippers have been widely used as bags whose openings can be easily resealed. This bag with a zipper is (1) a method of manufacturing a film with a zipper obtained by separately manufacturing a base film and a zipper tape and then bonding the zipper tape to the base film; A method of heat-sealing the base film while extruding it, and making a bag,
(3) Generally, the extruder is provided with cuts corresponding to male and female chucks in a die of an extruder to integrally form a film with a chuck, and then the bag is manufactured by any one of bag manufacturing methods. It was a target.
【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、この方法で製造したチャック付き
袋は、通常、チャック部と基材フィルムが同じ材質の樹
脂を使用しているため、チャック部の成形性や保形性を
重視して樹脂を選択した場合は、腰が強く、しなやかな
風合いに欠けるものであった。一方、袋のしなやかさを
重視して樹脂を選択した場合、成形時にチャック部の保
形性に欠けるため、使用時にチャック部が密封性や再封
鎖性において不良となりチャック付き袋としては使用で
きないものであった。[0003] Among them, the method (3) has the advantage that the manufacturing process is simple and the manufacturing cost can be reduced, so that it is said that the method (3) is suitable for manufacturing a general-purpose bag with a chuck. However, in the case of a bag with a zipper manufactured by this method, since the zipper portion and the base film are usually made of the same resin material, when the resin is selected with emphasis on the moldability and shape retention of the zipper portion. Was strong and lacked a supple texture. On the other hand, if resin is selected with emphasis on the flexibility of the bag, the shape of the chuck part will be poor in shape retention and re-sealing property during use, and it will not be possible to use it as a bag with a chuck due to lack of shape retention of the chuck part during use. Met.
【０００４】[0004]
【本発明が解決しようとする課題】本発明は、チャック
付き袋の本来の機能である密封性、再封鎖性に優れてお
り、しかもしなやかな風合いを有するチャック付き袋を
容易に低コストで提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention provides a bag with a zipper excellent in the original functions of a bag with a zipper, such as sealing and resealing, and having a supple feel, easily and at low cost. The purpose is to do.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、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
ルムを製袋して得られるチャック付き袋において、チャ
ック部が低密度ポリエチレンからなり、基材フィルムが
ＥＭＭＡからなることを特徴とするチャック付き袋が提
供され、更に、前記基材フィルムが６０〜９０wt％のＥ
ＭＭＡと１０〜４０wt％の低密度ポリエチレンの混合物
からなることを特徴とするチャック付き袋が提供され、
更にまた、前記チャック部を形成する低密度ポリエチレ
ンが、ＭＦＲ＝２〜５であることを特徴とするチャック
付き袋が提供される。According to the present invention, in a bag with a chuck obtained by manufacturing a film with a chuck in which a chuck portion and a base film are integrally formed, the chuck portion is made of low-density polyethylene, A bag with a zipper is provided wherein the base film is made of EMMA.
A bag with a zipper is provided, comprising a mixture of MMA and 10-40 wt% of low density polyethylene,
Furthermore, there is provided a bag with a zipper, wherein the low-density polyethylene forming the zipper portion has an MFR of 2 to 5.
【０００６】すなわち、押出成形時の成形性及び保形成
に優れた低密度ポリエチレンを用いてチャック部を形成
し、ＥＭＭＡもしくはＥＭＭＡと低密度ポリエチレンか
らなる樹脂を用いて基材フィルムを形成することで、密
封性や再封鎖性に優れたチャック部としなやかな風合い
の袋部を兼備したチャック付き袋を得ることができるこ
とを見いだいし本発明に到達した。That is, the chuck portion is formed by using low-density polyethylene having excellent moldability and preservation during extrusion molding, and a base film is formed by using EMMA or a resin composed of EMMA and low-density polyethylene. The present inventors have found that it is possible to obtain a bag with a zipper which has both a zipper having excellent sealing properties and a resealing property and a pliable bag.
【０００７】以下、本発明を具体的に説明する。本発明
のチャック付き袋は、袋の開口部付近に相互に咬み合わ
せ可能な雄型プロフィルと雌型プロフィルからなるチャ
ック部を有する構成となっている。チャック部に使用す
る樹脂は低密度ポリエチレンが使用されるが、チャック
部成形時の成形性、保形性を考慮すると密度が０．９１
８〜０．９２８ｇ／ｃｍ3 の低密度ポリエチレン、特に
ＭＦＲが２〜５の低密度ポリエチレンが好ましい。ＭＦ
Ｒが２以下になるとチャック部の基材フィルムへの接着
が不良になり、またＭＦＲが５以上になるとチャック部
の成形性が悪くなる。Hereinafter, the present invention will be described specifically. The bag with a zipper according to the present invention is configured to have a chuck portion including a male profile and a female profile that can bite each other near the opening of the bag. Low-density polyethylene is used as the resin for the chuck portion, but the density is 0.91 in consideration of moldability and shape retention during molding of the chuck portion.
Low density polyethylene 8~0.928g / cm 3, in particular MFR of low density polyethylene 2-5 are preferred. MF
When R is 2 or less, adhesion of the chuck portion to the base film becomes poor, and when MFR is 5 or more, moldability of the chuck portion deteriorates.
【０００８】基材フィルムに使用する樹脂は、ＥＭＭＡ
もしくはＥＭＭＡと低密度ポリエチレンの混合物であ
る。本発明においては、ＥＭＭＡ樹脂として、樹脂中の
メチルメタクリレート含量が５〜４０wt％の範囲のもの
が好適に使用でき、１０〜２０wt％のものが特に好まし
い。メチルメタクリレート含量が５wt％未満ではフィル
ムにしなやかさがでず、また４０wt％を超えるとフィル
ムがべとつき製膜が困難になる。The resin used for the base film is EMMA
Alternatively, it is a mixture of EMMA and low density polyethylene. In the present invention, as the EMMA resin, those having a methyl methacrylate content in the range of 5 to 40 wt% can be suitably used, and those having 10 to 20 wt% are particularly preferable. If the methyl methacrylate content is less than 5 wt%, the film will not be pliable, and if it exceeds 40 wt%, the film will be sticky and difficult to form.
【０００９】ＥＭＭＡ樹脂を単独で用いると透明性が良
好で、しなやかな風合いのチャック付き袋が得られ、Ｅ
ＭＭＡと低密度ポリエチレンの混合物を用いた場合は、
表面に細やかな凹凸を有する梨地調で肌触りの極めて優
れたチャック付き袋が得られる。なお梨地調のチャック
付き袋を得る場合の、ＥＭＭＡと低密度ポリエチレンの
混合割合は６０〜９０wt％: １０〜４０wt％の範囲内に
することが好ましい。特に、低密度ポリエチレンの混合
割合が４０wt％を越えるとＥＭＭＡとの相溶性が悪くな
り、基材フィルムの腰も強くなるため好ましくない。When EMMA resin is used alone, a bag with good transparency and a supple texture can be obtained.
When a mixture of MMA and low density polyethylene is used,
A zipper-like bag having a pear-skin finish having fine irregularities on the surface and having extremely excellent touch can be obtained. When a pear-skinned bag with a zipper is obtained, the mixing ratio of EMMA and low-density polyethylene is preferably in the range of 60 to 90 wt%: 10 to 40 wt%. In particular, if the mixing ratio of the low-density polyethylene exceeds 40% by weight, the compatibility with EMMA deteriorates, and the rigidity of the base film increases, which is not preferable.
【００１０】更に、上記樹脂には必要に応じて、耐電防
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, additives such as an antistatic agent, a lubricant, an anti-blocking agent, and a coloring agent can be added to the above resin, if necessary.
【００１１】次に本発明のチャック付き袋の製造方法に
ついて一例を示して説明する。二台の押出機にチャック
部用樹脂と基材フィルム用樹脂をそれぞれ供給して、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込
を有する環状ダイスにの切込部にチャック部用樹脂が、
スリット部に基材フィルム用樹脂がくるようにそれぞれ
導入し樹脂温度１３０〜１４０℃、ブロー比１．０でイ
ンフレーション押出成形し、チャック部付きのチューブ
フィルムを製造する。Next, a method for manufacturing a bag with a zipper according to the present invention will be described with reference to an example. The resin for the chuck portion and the resin for the base film are supplied to the two extruders, respectively, and the resin for the chuck portion is inserted into the cut portion of the annular die having cuts adapted to the shapes of the male profile and the female profile. But,
The resin for the base film is introduced so as to come into the slit portion, and is blown and extruded at a resin temperature of 130 to 140 ° C. and a blow ratio of 1.0 to produce a tube film with a chuck portion.
【００１２】こうして得られたチャック付きチューブフ
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
うに折り曲げた後、雄型プロフィルと雌型プロフィルの
間をカットし、フィルムの幅方向に両サイドをヒートシ
ールすることによって本発明のチャック付き袋を製造す
る。After bending the male and female profiles of the thus obtained tube film with chuck so that the male and female profiles face each other, the space between the male and female profiles is cut, and both sides are heated in the width direction of the film. The bag with a zipper of the present invention is manufactured by sealing.
【００１３】[0013]
【作用及び効果】本発明のチャック付き袋は、低密度ポ
リエチレンでチャック部を、ＥＭＭＡもしくはＥＭＭＡ
と低密度ポリエチレンとをブレンドした樹脂で基材フィ
ルムを形成しているので、チャック部の密封性や再密封
性に優れており、また袋部は柔軟でしなやかな風合いを
持っている。また、このようなチャック付き袋は製造工
程が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である。The bag with a zipper according to the present invention has a zipper portion made of EMMA or EMMA made of low-density polyethylene.
Since the base film is formed of a resin blended with low-density polyethylene, the sealing and resealing properties of the chuck section are excellent, and the bag section has a soft and flexible texture. Further, since such a bag with a zipper has a simple manufacturing process, it is possible to provide a low-cost, high-performance bag with a zipper.
フロントページの続き (56)参考文献 特開 平５−294352（ＪＰ，Ａ) 特開 平７−69354（ＪＰ，Ａ) 実開 昭57−105250（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B65D 33/25 Continuation of the front page (56) References JP-A-5-294352 (JP, A) JP-A-7-69354 (JP, A) JP-A-57-105250 (JP, U) (58) Fields surveyed (Int .Cl. 7 , DB name) B65D 33/25
Claims (2)
ィルムが一体成形されたチャック付きフィルムを製袋し
て得られるチャック付き袋において、チャック部が密度
０．９１８〜０．９２８ｇ／ｃｍ ３ でＭＦＲ=２〜５で
ある低密度ポリエチレンからなり、基材フィルムがメチ
ルメタクリレート含有量５〜４０ｗｔ％のエチレンとメ
チルメタクリレートの共重合樹脂（以下、ＥＭＭＡと称
す。）からなることを特徴とするチャック付き袋。1. A bag with a chuck obtained by manufacturing a film with a chuck in which a chuck portion and a base film are integrally formed by an extrusion molding method, wherein the chuck portion has a density of
0.918 to 0.928 g / cm 3 and MFR = 2 to 5
Made from a certain low density polyethylene, the substrate film methylcarbamoyl
A bag with a chuck, comprising a copolymer resin of ethylene and methyl methacrylate having a methacrylate content of 5 to 40 wt% (hereinafter referred to as EMMA).
ＥＭＭＡと１０〜４０ｗｔ％の低密度ポリエチレンの混
合物からなることを特徴とする請求項１記載のチャック
付き袋。2. The bag with a zipper according to claim 1, wherein the base film is made of a mixture of 60 to 90 wt% EMMA and 10 to 40 wt% low density polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12719694A JP3294002B2 (en) | 1994-06-09 | 1994-06-09 | Bag with zipper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12719694A JP3294002B2 (en) | 1994-06-09 | 1994-06-09 | Bag with zipper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07329990A JPH07329990A (en) | 1995-12-19 |
| JP3294002B2 true JP3294002B2 (en) | 2002-06-17 |
Family
ID=14954082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12719694A Expired - Fee Related JP3294002B2 (en) | 1994-06-09 | 1994-06-09 | Bag with zipper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3294002B2 (en) |
Families Citing this family (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 |
| JP2009018052A (en) * | 2007-07-12 | 2009-01-29 | C I Kasei Co Ltd | Engagement tool and packing bag with engagement tool |
-
1994
- 1994-06-09 JP JP12719694A patent/JP3294002B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07329990A (en) | 1995-12-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |