JP2004099166A

JP2004099166A - Permeable packaging bag

Info

Publication number: JP2004099166A
Application number: JP2002302732A
Authority: JP
Inventors: Toshihiko Yamane; 山根　俊彦; Shigetoshi Sasaki; 佐々木　重俊; Mitsuya Yarimizu; 鑓水　光哉
Original assignee: Toppan Printing Co Ltd
Current assignee: Toppan Inc
Priority date: 2002-07-19
Filing date: 2002-10-17
Publication date: 2004-04-02
Anticipated expiration: 2022-10-17
Also published as: JP4140337B2

Abstract

<P>PROBLEM TO BE SOLVED: To satisfactorily remove air, prevent ingress or stay of foreign matter, bugs, etc. through the nonsealable portions of a second discontinuous linear seal formed outside and to prevent foreign matter or bugs entering and staying there from further entering the packaging bag the permeable nonsealable portions of a first discontinuous linear seal formed inside. <P>SOLUTION: The permeable packaging bag formed from a film for bag making has in one of its ends a discontinuous linear seal which consists of sealable portions and permeable nonsealable portions. In the permeable packaging bag, the discontinuous linear seal consists of the inside discontinuous linear seal portion 6 and the outside discontinuous linear seal portion 9 which are parallel along the end of the packaging bag A. The relationship between the length d1 of an interval between the permeable nonsealable portions 8 of the inside discontinuous linear seal portion 6 and the length d2 of an interval between the permeable nonsealable portions 11 of the outside discontinuous linear seal portion 9 is d1≥d2. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、プラスチックフィルムにより製袋した包装袋の一端部にシール部と通気性未シール部とからなる断続線状シール部を備えた米等の穀物類を包装する通気性包装袋に関する。
【０００２】
【従来の技術】
シール部と通気性未シール部とからなる断続線状シール部を備えた米等の穀物類を包装する従来の通気性の包装袋は、例えば、図６（ａ）に示すようにプラスチック製の矩形状の二つ折りフィルムの三方開放端部２、３、５及び折目部４のうち二方端部２、３、又は図６（ｂ）に示すように二枚重ねフィルムの四方開放端部２、３、４、５のうち三方端部２、３、４をヒートシールして製袋されている。
【０００３】
そして、製袋された上記包装袋Ａにおいて、図６（ａ）又は図６（ｂ）に示すように、残りの一方開放端部５の開口部から米等の穀物類を充填した後、その包装袋Ａの開放端部５の内端側に、ヒートシール部７と、穀物類がこぼれ出ない程度のサイズの空間長さｄ１　の通気性の未ヒートシール部８とからなる第一断続線状シール部６が設けられ、その第一断続線状シール部６より外端側に平行に所定間隔を空けて、ヒートシール部１０と、空間長さｄ２　の通気性の未ヒートシール部１１とからなる第二断続線状シール部９を設け、二条の断続線状シール部を設けることにより開放端部５を封鎖して包装されている。
【０００４】
上記従来の通気性包装袋Ａは、図６（ａ）又は図６（ｂ）に示すように、包装袋Ａの内端側の断続線状シール部６の隣接する各シール部７間の通気性未シール部８の空間長さｄ１　が、外端側の断続線状シール部９の通気性の未シール部１１の空間長さｄ２　よりも狭い幅（ｄ１　＜ｄ２　）に形成されている。
【０００５】
【特許文献１】
特開平８−２６３００号公報
【特許文献２】
特開平１１−２９１５３号公報
【０００６】
【発明が解決しようとする課題】
上記包装袋Ａの内端側の第一断続線状シール部６と外端側の第二断続線状シール部９のそれぞれ未シール部８、１１は、包装袋Ａの内と外とのエアー通路となっているが、内端側の通気性未シール部８が外端側の未シール部１１よりも狭いためにエアーの抜けが十分でないものであった。
【０００７】
また、内端側の第一断続線状シール部６の通気性の未シール部８の空間長さｄ１　に比較して、外端側の第二断続線状シール部９の未シール部１１の空間長さｄ２　が広いために、第二断続線状シール部９の未シール部１１から第一断続線状シール部６と第二断続線状シール部９との隙間に異物や虫等が入り込み、滞留し易く、さらに入り込み滞留した異物や虫が、内端側の第一断続線状シール部６の通気性の未シール部８から包装袋Ａ内の内容物中に進入する恐れがあった。
【０００８】
本発明は、通気性包装袋において、従来のものよりもエアーの抜けを良好にするとともに、第二断続線状シール部の未シール部から異物や虫等が入り込んだり滞留するのを防止し、さらに入り込み滞留した異物や虫が、内端側の第一断続線状シール部の通気性の未シール部から包装袋内に進入するのを防止することにある。
【０００９】
【課題を解決するための手段】
本発明の請求項１に係る発明は、製袋用フィルムにより製袋した包装袋の一端部に、シール部と通気性未シール部とからなる断続線状シール部を備えた通気性包装袋において、前記断続線状シール部が、包装袋の内端側と外端側に平行に設けた二条の断続線状シール部により構成され、且つ内端側の断続線状シール部６の通気性未シール部８の空間長さｄ１　が、外端側の断続線状シール部９の通気性未シール部１１の空間長さｄ２　よりも広幅に設定されていることを特徴とする通気性包装袋である。
【００１０】
本発明の請求項２に係る発明は、製袋用フィルムにより製袋した包装袋の一端部に、シール部と通気性未シール部とからなる断続線状シール部を備えた通気性包装袋において、前記断続線状シール部が、包装袋の内端側と外端側に平行に設けた二条の断続線状シール部により構成され、且つ内端側の断続線状シール部６の通気性未シール部８の空間長さｄ１　と、外端側の断続線状シール部９の通気性未シール部１１の空間長さｄ２　が同じ幅（ｄ１　＝ｄ２　）に設定されていることを特徴とする通気性包装袋である。
【００１１】
本発明の請求項３に係る発明は、上記請求項１又は請求項２に係る通気性包装袋において、前記内端側の断続線状シール部６におけるシール部７の長さＬ７　が外端側の断続線状シール部９におけるシール部１０の長さＬ１０よりも長目（Ｌ７　＞Ｌ１０）に設定されていることを特徴とする通気性包装袋である。
【００１２】
本発明の請求項４に係る発明は、上記請求項１乃至請求項３のいずれか１項に係る通気性包装袋において、前記内端側の断続線状シール部６におけるシール部７の長さＬ７　が、外端側の断続線状シール部９におけるシール部１０の長さＬ１０の２倍若しくはそれ以上（Ｌ７　≧Ｌ１０×２）に設定されていることを特徴とする通気性包装袋である。
【００１３】
本発明の請求項５に係る発明は、上記請求項１乃至請求項４のいずれか１項に係る通気性包装袋において、平行に設けた二条の前記内端側の断続線状シール部６と外端側の断続線状シール部９の線条間隔ｄ３　が５〜１０ｍｍであることを特徴とする通気性包装袋である。
【００１４】
【発明の実施の形態】
本発明の請求項１に係る通気性包装袋の実施の形態を、図１の平面図に基づいて以下に詳細に説明すれば、本発明の通気性包装袋Ａは、二枚重ね又は二つ折り又はシール筒状又はシールレス筒状のプラスチックフィルム又はプラスチックフィルムと、紙、アルミ箔、無機酸化物の蒸着フィルム等のラミネートフィルムからなる複合フィルムによる製袋用フィルムにより製袋されている。
【００１５】
例えば、図１に示すように、矩形状の二つ折り製袋用フィルムの三方開放端部２、３、５及び折目部４のうち二方端部２、３をヒートシールして製袋されている。
【００１６】
そして、製袋された上記包装袋Ａは、残りの開放端部５を内容物充填用の開口部として、その開放端部５から米等の穀物類を充填した後、その包装袋Ａの開放端部５の内端側に、ヒートシール部７と、空間長さｄ１　（必要に応じて穀物類等の内容物がこぼれ出ない程度のサイズ）の通気性の未ヒートシール部８とからなる第一断続線状シール部６が設けられている。
【００１７】
そして、その第一断続線状シール部６より外端側に平行に所定間隔ｄ３　を空けて、ヒートシール部１０と、穀物類等の内容物がこぼれ出ない程度のサイズの空間長さｄ２　の通気性の未ヒートシール部１１とからなる第二断続線状シール部９が設けられていて、二条の断続線状シール部を設けることにより、包装袋Ａの開口部としての開放端部５が封鎖されて包装されている。
【００１８】
図２は、図１の包装袋Ａの開放端部５に二条の断続線状シール部６、９を設けた状態を示す部分拡大平面図であり、本発明の通気性包装袋Ａは、内端側の第一断続線状シール部６の未シール部８の空間長さｄ１　と、外端側の第二断続線状シール部９の未シール部１１の空間長さｄ２　との大小関係はｄ１　＞ｄ２　となっている。
【００１９】
内端側の上記空間長さｄ１　は、内容物の粒径に対して十分小さい数値に設定されてもよいし、内容物の粒径と同程度若しくはそれより大きい数値に設定されていてもよい。
【００２０】
また、外端側の上記空間長さｄ２　は、内容物がこぼれ出ない程度の数値か、又は内容物の粒径に対して十分小さい数値に設定されている。
【００２１】
例えば、一例として、図２に示す内端側の未シール部８の空間長さｄ１　は、米粒など穀物の最少粒径に対して半分程度の１〜２ｍｍ又は２〜５ｍｍ又は３〜８ｍｍ、また、好ましくは５ｍｍ程度に設定され、また外端側の未シール部１１の空間長さｄ２　は、米粒など穀物の最少粒径に対して十分小さい０．３〜０．５ｍｍ又は０．５〜１ｍｍ又は１〜３ｍｍ程度、好ましくは３〜５ｍｍ未満に設定され、二条の断続線状シール部６、９の平行間隔ｄ３　は、１〜２ｍｍ又は２〜３ｍｍ又は２〜５ｍｍ又は４〜８ｍｍ、また、好ましくは５〜１０ｍｍ程度に設定される。
【００２２】
また、一例として、図２に示す内端側のシール部７の幅は２〜３ｍｍ程度で、その長さＬ７　は特に限定しないが、例えば２０ｍｍ程度が適当であり、外端側のシール部１０の幅は２〜３ｍｍ程度で、その長さＬ１０はＬ７　と同じ長さでも、又は短くても長くてもよいが、好ましくはシール部７の長さＬ７　はシール部１０の長さＬ１０の２倍程度、若しくはそれ以上の長さ（Ｌ７　≧Ｌ１０×２）であって、例えば１７〜２０ｍｍ未満のライン状のシール部７、又はそのライン状のシール部７とシール部１０の長さＬ１０が２ｍｍ程度のポイントシールの２種類が適当である。
【００２３】
本発明の上記請求項１に係る通気性包装袋は、内端側の断続線状シール部６の隣接する各シール部７間の通気性の各々未シール部８の空間長さｄ１　が、外端側の断続線状シール部９の通気性の各々未シール部１１の空間長さｄ２　よりも広い幅（ｄ１　＞ｄ２　）に形成されているので、包装袋Ａ内の内容物と直接に接触する内端側の前記第一断続線状シール部６の未シール部８が、穀物類などの粒状物による目詰まりを起こし難くなり、そのため外端側の第二断続線状シール部９の未シール部１１に対する通気性が良くなり、内容物を充填して封鎖した後の包装袋Ａの各々未シール部８、１１によるエアー抜けが良好となる作用がある。
【００２４】
また、内端側の第一断続線状シール部６の通気性の未シール部８の空間長さｄ１　に比較して外端側の第二断続線状シール部９の未シール部１１の空間長さｄ２　は狭く設定してあり、穀物等の粒状内容物の粒径に対して十分小さく設定してあるので、異物や虫等が第二断続線状シール部９の未シール部１１から入り込み難くなり、包装袋Ａ内への進入を防止できる作用がある。
【００２５】
次に、本発明の請求項２に係る通気性包装袋の実施の形態を、図３の平面図、図４の部分拡大平面図、図５の部分拡大平面図に基づいて以下に詳細に説明すれば、本発明の通気性包装袋Ａは、上記請求項１に係る通気性包装袋Ａにおいて、内端側の断続線状シール部６の通気性未シール部８の空間長さｄ１　と、外端側の断続線状シール部９の通気性未シール部１１の空間長さｄ２　が同じ幅（ｄ１　＝ｄ２　）に設定されているものである。
【００２６】
例えば、一例として、図４に示す内端側の未シール部８の空間長さｄ１　と外端側の断続線状シール部９の空間長さｄ２　とは、米粒など穀物の最少粒径に対して半分程度の１〜２ｍｍ又は２〜５ｍｍ又は３〜８ｍｍ、また、好ましくは５ｍｍ程度に設定され、二条の断続線状シール部６、９の平行間隔ｄ３　は、１〜２ｍｍ又は２〜３ｍｍ又は２〜５ｍｍ又は４〜８ｍｍ、また、好ましくは５〜１０ｍｍ程度に設定される。
【００２７】
また、一例として、図４に示す内端側のシール部７の幅は２〜３ｍｍ程度で、その長さＬ７　は特に限定しないが、例えば２０ｍｍ程度が適当であり、外端側のシール部１０の幅は２〜３ｍｍ程度で、その長さＬ１０はＬ７　と同じ長さでも、又は短くても長くてもよいが、好ましくはシール部７の長さＬ７　はシール部１０の長さＬ１０の２倍程度、若しくはそれ以上の長さ（Ｌ７　≧Ｌ１０×２）であって、例えば１７〜２０ｍｍ未満のライン状のシール部７、又はそのライン状のシール部７とシール部１０の長さＬ１０が２ｍｍ程度のポイントシールの２種類が適当である。
【００２８】
また、図４に示す断続線状シール部６を構成する全てのシール部７の長さＬ７　は、同一であってもよいし、それぞれ異なっていてもよい。また断続線状シール部９を構成する全てのシール部１０の長さＬ１０も、同一であってもよいし、それぞれ異なっていてもよい。
【００２９】
例えば、図４に示すように、内端側の断続線状シール部６の各々シール部７の長さＬ７　は全て同一長さであり、外端側（袋端部５側）の断続線状シール部９の各々シール部１０の長さＬ１０は、互いに隣設するシール部１０の長さＬ１０に大小を付けて一つ置きに同じ長さに形成してもよいし、また図５に示すように、内端側の断続線状シール部６の各々シール部７の長さＬ７　を全て同一長さに形成し、外端側（袋端部５側）の断続線状シール部９の各々シール部１０の長さＬ１０も全て同一長さに形成してもよい。また、図４、図５において、内端側の断続線状シール部６の各々シール部７の長さＬ７　と、外端側（袋端部５側）の断続線状シール部９の互いに隣接する二つのシール部１０の間隔ｄ２　と長さ２×Ｌ１０とを加算した長さの関係を、Ｌ７　≠ｄ２　＋２×Ｌ１０と設定してもよいが、Ｌ７　＝ｄ２　＋２×Ｌ１０と設定することにより、内端側の断続線状シール部６と外端側の断続線状シール部９のシールパターンの位相が合致するので好適である。
【００３０】
本発明の上記請求項２に係る通気性包装袋は、内端側の断続線状シール部６の隣接する各シール部７間における通気性の各々未シール部８の空間長さｄ１　が、外端側の断続線状シール部９の通気性の各々未シール部１１の空間長さｄ２　と同じ幅（ｄ１　＝ｄ２　）に形成されるので、例えば、空間長さｄ１　とｄ２　とを３〜８ｍｍ程度に設定し、内端側のシール部７のシール長さＬ７　を１５〜３５ｍｍ程度に設定し、外端側のシール部１０のシール長さＬ１０を５〜１０ｍｍ程度に設定することにより、脱気装置などを使用して強制脱気を行う場合に、脱気装置上でエアーが抜け難い現象を回避することができ、脱気による包装袋の破袋の発生を防止することができるものである。
【００３１】
また、内端側の第一断続線状シール部６の通気性の未シール部８の空間長さｄ１　と、外端側の第二断続線状シール部９の未シール部１１の空間長さｄ２　とを５ｍｍ以下に狭く設定し、穀物等の粒状内容物の粒径に対して十分小さく設定することにより、異物や虫等が第二断続線状シール部９の未シール部１１から入り込み難くなり、包装袋Ａ内への進入を防止できる作用がある。
【００３２】
【発明の効果】
本発明の通気性包装袋は、従来の通気性包装袋よりもエアーの抜けを良好にすることができるとともに、第二断続線状シール部の未シール部から異物や虫等が入り込んだり、滞留したりするのを防止でき、さらに入り込み滞留した異物や虫が包装袋内に進入するのを防止できる効果がある。
【図面の簡単な説明】
【図１】本発明の通気性包装袋の一実施の形態を説明する平面図。
【図２】本発明の通気性包装袋の一実施の形態において形成された平行な二条の断続線状シール部を説明する部分拡大平面図。
【図３】本発明の通気性包装袋の他の実施の形態を説明する平面図。
【図４】本発明の通気性包装袋の他の実施の形態において形成された平行な二条の断続線状シール部を説明する部分拡大平面図。
【図５】本発明の通気性包装袋のその他の実施の形態において形成された平行な二条の断続線状シール部を説明する部分拡大平面図。
【図６】（ａ）〜（ｂ）は従来の通気性包装袋を説明する平面図。
【符号の説明】
Ａ…包装袋
１…製袋用フィルム　２、３、４…端部　５…開放端部
６…包装袋内端側の断続線状シール部　７…シール部　８…未シール部
９…包装袋外端側の断続線状シール部　１０…シール部　１１…未シール部
ｄ１　…内端側の未シール部の空間長さ　　ｄ２　…外端側の未シール部の空間長さ
ｄ３　…線状シール部の平行間隔
Ｌ７　…内端側の断続線状シール部のシール長さ
Ｌ１０…外端側の断続線状シール部のシール長さ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gas-permeable packaging bag for packaging cereals such as rice, which is provided with an intermittent linear sealing portion including a sealing portion and a gas-permeable unsealing portion at one end of a packaging bag made of a plastic film.
[0002]
[Prior art]
A conventional air-permeable packaging bag for packing cereals such as rice provided with an intermittent linear seal portion including a seal portion and a gas-permeable unsealed portion is made of, for example, a plastic bag as shown in FIG. Among the three-side open ends 2, 3, 5 and the fold part 4 of the rectangular two-fold film, the two-side ends 2, 3 or the four-side open end 2, of the double-layered film as shown in FIG. Bags are manufactured by heat-sealing the three end portions 2, 3, and 4 of 3, 4, and 5.
[0003]
Then, as shown in FIG. 6 (a) or FIG. 6 (b), after filling the cereals such as rice from the opening portion of the remaining one open end portion 5, in the packaging bag A thus made, On the inner end side of the open end portion 5 of the packaging bag A, a first interrupted line including a heat seal portion 7 and a gas permeable non-heat seal portion 8 having a space length d1 of a size such that grains do not spill out. And a heat-sealing portion 10 and a gas-permeable non-heat-sealing portion 11 having a space length d2 at a predetermined interval parallel to the outer end side of the first intermittent linear seal portion 6. Is provided, and the open end 5 is closed and packaged by providing two intermittent linear seal portions.
[0004]
As shown in FIG. 6 (a) or FIG. 6 (b), the conventional breathable packaging bag A has a ventilation between the adjacent sealing portions 7 of the intermittent linear sealing portion 6 on the inner end side of the packaging bag A. The space length d1 of the non-sealing portion 8 is formed to have a width (d1 <d2) smaller than the space length d2 of the air-permeable non-sealing portion 11 of the intermittent linear sealing portion 9 on the outer end side.
[0005]
[Patent Document 1]
JP-A-8-26300 [Patent Document 2]
JP-A-11-29153 [0006]
[Problems to be solved by the invention]
The unsealed portions 8 and 11 of the first intermittent linear seal portion 6 on the inner end side of the packaging bag A and the second intermittent linear seal portion 9 on the outer end side respectively provide air between the inside and the outside of the packaging bag A. Although it is a passage, air is not sufficiently removed because the air-permeable unsealed portion 8 on the inner end side is narrower than the unsealed portion 11 on the outer end side.
[0007]
In addition, as compared with the space length d1 of the air-permeable unsealed portion 8 of the first interrupted linear seal portion 6 on the inner end side, the unsealed portion 11 of the second interrupted linear seal portion 9 on the outer end side is also reduced. Since the space length d2 is large, foreign matter and insects enter the gap between the first interrupted linear seal portion 6 and the second interrupted linear seal portion 9 from the unsealed portion 11 of the second interrupted linear seal portion 9. There is a possibility that foreign matter and insects which are easily retained and enter and stay therein may enter the contents in the packaging bag A from the air-permeable unsealed portion 8 of the first interrupted linear seal portion 6 on the inner end side. .
[0008]
The present invention, in a breathable packaging bag, while improving the air escape better than conventional ones, to prevent foreign matters and insects from entering or staying from the unsealed portion of the second intermittent linear seal portion, Another object of the present invention is to prevent foreign matters and insects that have entered and stayed from entering the packaging bag from the air-permeable unsealed portion of the first intermittent linear seal portion on the inner end side.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention relates to a gas-permeable packaging bag provided with an intermittent linear seal portion including a seal portion and a gas-permeable unsealed portion at one end of a packaging bag made of a bag-making film. The intermittent linear seal portion is constituted by two intermittent linear seal portions provided in parallel on the inner end side and the outer end side of the packaging bag. The space length d1 of the seal portion 8 is set to be wider than the space length d2 of the gas-permeable unsealed portion 11 of the intermittent linear seal portion 9 on the outer end side. is there.
[0010]
The invention according to claim 2 of the present invention relates to a gas-permeable packaging bag provided with an intermittent linear seal portion including a seal portion and a gas-permeable unsealed portion at one end of a packaging bag made of a bag-making film. The intermittent linear seal portion is constituted by two intermittent linear seal portions provided in parallel on the inner end side and the outer end side of the packaging bag. The space length d1 of the seal portion 8 and the space length d2 of the gas-permeable unsealed portion 11 of the intermittent linear seal portion 9 on the outer end side are set to have the same width (d1 = d2). It is a breathable packaging bag.
[0011]
According to a third aspect of the present invention, in the breathable packaging bag according to the first or second aspect, the length L7 of the seal portion 7 in the intermittent linear seal portion 6 on the inner end side is the outer end side. A length (L7> L10) longer than the length L10 of the seal portion 10 in the intermittent linear seal portion 9 described above.
[0012]
According to a fourth aspect of the present invention, in the breathable packaging bag according to any one of the first to third aspects, the length of the sealing portion 7 in the intermittent linear sealing portion 6 on the inner end side is provided. L7 is a breathable packaging bag characterized in that the length L10 of the seal portion 10 in the intermittent linear seal portion 9 on the outer end side is set to twice or more (L7 ≧ L10 × 2). .
[0013]
The invention according to claim 5 of the present invention relates to the air-permeable packaging bag according to any one of claims 1 to 4, wherein the two parallelly provided intermittent linear seal portions 6 on the inner end side are provided. A breathable packaging bag, characterized in that the interline spacing d3 of the intermittent linear seal portion 9 on the outer end side is 5 to 10 mm.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the breathable packaging bag according to claim 1 of the present invention will be described in detail below with reference to the plan view of FIG. 1. A bag is formed from a composite film composed of a cylindrical or sealless cylindrical plastic film or a plastic film and a laminated film such as paper, aluminum foil, or a vapor-deposited film of inorganic oxide.
[0015]
For example, as shown in FIG. 1, a bag is formed by heat-sealing the two end portions 2 and 3 of the three-side open ends 2, 3 and 5 and the fold portion 4 of the rectangular two-fold bag making film. ing.
[0016]
The packaging bag A thus produced is filled with grains such as rice from the open end 5 with the remaining open end 5 serving as an opening for filling the contents. On the inner end side of the end portion 5, a heat-sealing portion 7 and a gas-permeable non-heat-sealing portion 8 having a space length d1 (a size such that contents such as grains do not spill out as necessary) are provided. A first intermittent linear seal portion 6 is provided.
[0017]
The heat seal portion 10 and a space length d2 of such a size that the contents such as grains do not spill out are spaced apart from the first intermittent linear seal portion 6 by a predetermined distance d3 parallel to the outer end side. A second intermittent linear seal portion 9 including a gas-permeable unheated seal portion 11 is provided. By providing two intermittent linear seal portions, the open end portion 5 as an opening portion of the packaging bag A is formed. Sealed and packaged.
[0018]
FIG. 2 is a partially enlarged plan view showing a state in which two discontinuous linear seal portions 6 and 9 are provided on the open end portion 5 of the packaging bag A of FIG. The size relationship between the space length d1 of the unsealed portion 8 of the first interrupted linear seal portion 6 on the end side and the space length d2 of the unsealed portion 11 of the second interrupted linear seal portion 9 on the outer end side is as follows. d1> d2.
[0019]
The space length d1 on the inner end side may be set to a numerical value sufficiently smaller than the particle diameter of the content, or may be set to a numerical value approximately equal to or larger than the particle diameter of the content. .
[0020]
The space length d2 on the outer end side is set to a value that does not allow the contents to spill out, or a value that is sufficiently small with respect to the particle size of the contents.
[0021]
For example, as an example, the space length d1 of the unsealed portion 8 on the inner end side shown in FIG. 2 is about 1 to 2 mm or 2 to 5 mm or 3 to 8 mm, which is about half the minimum grain size of grains such as rice grains. Is preferably set to about 5 mm, and the space length d2 of the unsealed portion 11 on the outer end side is 0.3 to 0.5 mm or 0.5 to 1 mm, which is sufficiently smaller than the minimum particle size of grains such as rice grains. Or about 1 to 3 mm, preferably set to less than 3 to 5 mm, the parallel spacing d3 of the two intermittent linear seal portions 6, 9 is 1 to 2 mm or 2 to 3 mm or 2 to 5 mm or 4 to 8 mm, Preferably, it is set to about 5 to 10 mm.
[0022]
Also, as an example, the width of the inner end side seal portion 7 shown in FIG. 2 is about 2 to 3 mm, and the length L7 is not particularly limited. For example, about 20 mm is appropriate, and the outer end side seal portion 10 is suitable. Is about 2 to 3 mm, and its length L10 may be the same length as L7, or may be shorter or longer. Preferably, the length L7 of the seal portion 7 is two times the length L10 of the seal portion 10. The length is about twice or more (L7 ≧ L10 × 2), and for example, the length L10 of the line-shaped seal portion 7 or the line-shaped seal portion 7 and the seal portion 10 less than 17 to 20 mm is less than 17 mm. Two types of point seals of about 2 mm are suitable.
[0023]
In the breathable packaging bag according to the first aspect of the present invention, the space length d1 of the air-permeable unsealed portion 8 between the adjacent seal portions 7 of the intermittent linear seal portion 6 on the inner end side is outside. Since the width (d1> d2) is larger than the space length d2 of each unsealed portion 11 of the air-permeable portion of the intermittent linear seal portion 9 on the end side, it is in direct contact with the contents in the packaging bag A. The unsealed portion 8 of the first intermittent linear seal portion 6 on the inner end side is less likely to be clogged by particulate matter such as grains, and therefore the unsealed portion 8 of the second intermittent linear seal portion 9 on the outer end side does not. The air permeability with respect to the seal portion 11 is improved, and there is an effect that the air escaping by the unsealed portions 8 and 11 of the packaging bag A after filling and sealing the contents is improved.
[0024]
In addition, the space of the unsealed portion 11 of the second interrupted line-shaped seal portion 9 on the outer end side is compared with the space length d1 of the air-permeable unsealed portion 8 of the first interrupted line-shaped seal portion 6 on the inner end side. Since the length d2 is set to be narrow and sufficiently small with respect to the particle size of the granular content such as grain, foreign matter and insects enter from the unsealed portion 11 of the second intermittent linear seal portion 9. This has the effect of making it difficult to prevent entry into the packaging bag A.
[0025]
Next, an embodiment of the breathable packaging bag according to claim 2 of the present invention will be described in detail below based on the plan view of FIG. 3, the partially enlarged plan view of FIG. 4, and the partially enlarged plan view of FIG. Then, the air-permeable packaging bag A of the present invention, in the air-permeable packaging bag A according to claim 1, has a space length d1 of the air-permeable unsealed portion 8 of the intermittent linear seal portion 6 on the inner end side, The space length d2 of the gas-permeable unsealed portion 11 of the intermittent linear seal portion 9 on the outer end side is set to the same width (d1 = d2).
[0026]
For example, as an example, the space length d1 of the unsealed portion 8 on the inner end side and the space length d2 of the intermittent linear seal portion 9 on the outer end side shown in FIG. About 1 to 2 mm or 2 to 5 mm or 3 to 8 mm, preferably about 5 mm, and the parallel interval d3 between the two interrupted linear sealing portions 6 and 9 is 1 to 2 mm or 2 to 3 mm or It is set to about 2 to 5 mm or 4 to 8 mm, and preferably about 5 to 10 mm.
[0027]
Also, as an example, the width of the inner end side seal portion 7 shown in FIG. 4 is about 2 to 3 mm, and the length L7 is not particularly limited. For example, about 20 mm is appropriate, and the outer end side seal portion 10 is suitable. Is about 2 to 3 mm, and its length L10 may be the same length as L7, or may be shorter or longer. Preferably, the length L7 of the seal portion 7 is two times the length L10 of the seal portion 10. The length is about twice or more (L7 ≧ L10 × 2), and for example, the length L10 of the line-shaped seal portion 7 or the line-shaped seal portion 7 and the seal portion 10 less than 17 to 20 mm is less than 17 mm. Two types of point seals of about 2 mm are suitable.
[0028]
Further, the lengths L7 of all the seal parts 7 constituting the intermittent linear seal part 6 shown in FIG. 4 may be the same or different. Also, the lengths L10 of all the seal portions 10 constituting the intermittent linear seal portion 9 may be the same or different.
[0029]
For example, as shown in FIG. 4, the length L7 of each of the seal portions 7 of the intermittent linear seal portion 6 on the inner end side is the same length, and the intermittent linear shape on the outer end side (bag end portion 5 side). The length L10 of each of the seal portions 10 of the seal portions 9 may be made equal to each other by adding a size to the length L10 of the seal portions 10 adjacent to each other, or may be formed as shown in FIG. Thus, the length L7 of each of the seal portions 7 of the intermittent linear seal portion 6 on the inner end side is formed to be the same length, and each of the intermittent linear seal portions 9 on the outer end side (bag end portion 5 side). The lengths L10 of the seal portions 10 may all be the same. 4 and 5, the length L7 of each seal portion 7 of the intermittent linear seal portion 6 on the inner end side and the intermittent linear seal portion 9 on the outer end side (bag end portion 5 side) are adjacent to each other. The relationship between the sum of the distance d2 between the two seal portions 10 and the length 2 × L10 may be set as L7 ≠ d2 + 2 × L10, but by setting L7 = d2 + 2 × L10. It is preferable because the phases of the seal patterns of the intermittent linear seal portion 6 on the inner end side and the intermittent linear seal portion 9 on the outer end side match.
[0030]
In the breathable packaging bag according to the second aspect of the present invention, the space length d1 of each of the gas-permeable unsealed portions 8 between the adjacent seal portions 7 of the intermittent linear seal portion 6 on the inner end side is outside. Since the width (d1 = d2) of the space length d2 of each of the unsealed portions 11 of the air permeability of the intermittent linear seal portion 9 on the end side is formed, for example, the space lengths d1 and d2 are 3 to 8 mm. By setting the seal length L7 of the inner end side seal portion 7 to about 15 to 35 mm and the seal length L10 of the outer end side seal portion 10 to about 5 to 10 mm. When performing forced degassing using a degassing device, it is possible to avoid the phenomenon that air is difficult to escape on the degassing device and prevent the occurrence of breakage of the packaging bag due to degassing. is there.
[0031]
Further, the space length d1 of the air-permeable unsealed portion 8 of the first intermittent linear seal portion 6 on the inner end side and the space length of the unsealed portion 11 of the second intermittent linear seal portion 9 on the outer end side. By setting d2 to be less than 5 mm and sufficiently smaller than the particle size of the granular content such as cereals, it is difficult for foreign substances, insects, and the like to enter from the unsealed portion 11 of the second intermittent linear seal portion 9. This has the effect of preventing entry into the packaging bag A.
[0032]
【The invention's effect】
The air-permeable packaging bag of the present invention can make air escape better than the conventional air-permeable packaging bag, and foreign matter and insects can enter or stay in from the unsealed portion of the second intermittent linear seal portion. In addition, there is an effect that foreign substances and insects that have entered and stayed in can be prevented from entering the packaging bag.
[Brief description of the drawings]
FIG. 1 is a plan view illustrating an embodiment of a breathable packaging bag according to the present invention.
FIG. 2 is a partially enlarged plan view illustrating two parallel interrupted linear seal portions formed in an embodiment of the breathable packaging bag according to the present invention.
FIG. 3 is a plan view illustrating another embodiment of the breathable packaging bag of the present invention.
FIG. 4 is a partially enlarged plan view illustrating a parallel two-part discontinuous linear seal portion formed in another embodiment of the breathable packaging bag of the present invention.
FIG. 5 is a partially enlarged plan view illustrating two parallel interrupted linear seal portions formed in another embodiment of the breathable packaging bag of the present invention.
FIGS. 6A and 6B are plan views illustrating a conventional breathable packaging bag.
[Explanation of symbols]
A: Packaging bag 1 ... Bag-making film 2, 3, 4 ... End 5 ... Open end 6 ... Intermittent linear seal on inner side of packaging 7 ... Seal 8: Unsealed 9: Outside packaging End-side intermittent linear seal portion 10 Seal portion 11 Unsealed portion d1 Space length of unsealed portion on inner end side d2 Space length d3 of unsealed portion on outer end side Linear seal portion Parallel interval L7: Seal length of the intermittent linear seal portion on the inner end side L10: Seal length of the intermittent linear seal portion on the outer end side

Claims

In an air-permeable packaging bag provided with an intermittent linear seal portion including a seal portion and an air-permeable unsealed portion at one end of a packaging bag made with a bag-making film, the intermittent linear seal portion includes a packaging bag. Of the inner end side and the outer end side thereof are formed in parallel with two interrupted linear seal portions, and the space length d1 of the gas-permeable unsealed portion 8 of the inner end side interrupted linear seal portion 6 is A breathable packaging bag characterized by being set wider than the space length d2 # of the gas-permeable unsealed portion 11 of the intermittent linear seal portion 9 on the end side.

In an air-permeable packaging bag provided with an intermittent linear seal portion including a seal portion and an air-permeable unsealed portion at one end of a packaging bag made with a bag-making film, the intermittent linear seal portion includes a packaging bag. And a space length d1 of the gas-permeable unsealed portion 8 of the inner end-side interrupted line-shaped seal portion 6 which is provided in parallel with the inner end side and the outer end side. A breathable packaging bag, wherein the space length d2 # of the gas-permeable unsealed portion 11 of the end-side intermittent linear seal portion 9 is set to the same width (d1 # = d2 #).

3. The air-permeable packaging bag according to claim 1, wherein the length L7 # of the seal portion 7 in the intermittent linear seal portion 6 on the inner end side is equal to the length of the seal portion 10 in the intermittent linear seal portion 9 on the outer end side. A breathable packaging bag characterized by being set longer (L7Ｌ> L10) than the length L10.

4. The air-permeable packaging bag according to claim 1, wherein a length L 7 of the seal portion 7 in the inner end-side intermittent linear seal portion 6 is an outer end-side intermittent linear seal. 5. A breathable packaging bag, wherein the length is set to twice or more (L7 ≧ L10 × 2) the length L10 of the sealing portion 10 in the portion 9.

5. The air-permeable packaging bag according to claim 1, wherein two parallel lines of the intermittent linear seal portion 6 on the inner end side and the intermittent linear seal portion 9 on the outer end side. 6. A breathable packaging bag, wherein the interval d3 is 5 to 10 mm.