JPH09221148A - Packaging sack for grain - Google Patents
Packaging sack for grainInfo
- Publication number
- JPH09221148A JPH09221148A JP5363396A JP5363396A JPH09221148A JP H09221148 A JPH09221148 A JP H09221148A JP 5363396 A JP5363396 A JP 5363396A JP 5363396 A JP5363396 A JP 5363396A JP H09221148 A JPH09221148 A JP H09221148A
- Authority
- JP
- Japan
- Prior art keywords
- holes
- packaging bag
- packaging
- bag
- 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
Landscapes
- Bag Frames (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、米穀類を包装し、
流通するために用いる包装袋に関し、更に詳しくは、包
装袋に米穀類を封入して積み重ねた時に、内部に残留す
る余分の空気を逃がし、破袋を防止できるように開孔部
が設けられた米穀類用包装袋の技術に関する。[0001] The present invention relates to packaging rice grains,
Regarding the packaging bag used for distribution, more specifically, when the rice grains are enclosed and stacked in the packaging bag, an opening portion is provided to allow excess air remaining inside to escape and prevent bag breakage. The technology of packaging bags for rice grains.
【0002】[0002]
【従来の技術】従来、米穀類を包装し、流通するために
用いる包装袋は、大抵の場合、プラスチックの多層積層
フィルムまたは単層フィルムを袋状に熱接着して製造さ
れる包装袋が用いられてきた。そして、袋を形成するフ
ィルムとしては、例えば、2軸延伸ナイロンフィルム/
アルミ蒸着ポリエチレンテレフタレートフィルム/直鎖
状低密度ポリエチレン層の積層フィルムや、2軸延伸ナ
イロンフィルム/直鎖状低密度ポリエチレン層の積層フ
ィルムなどの多層積層フィルム、或いは、直鎖状低密度
ポリエチレンの単層フィルムなどが用いられている。2. Description of the Related Art Conventionally, a packaging bag used for packaging and distributing rice grains is usually a packaging bag produced by heat-bonding a plastic multilayer laminated film or a single layer film into a bag shape. Has been. As the film forming the bag, for example, a biaxially stretched nylon film /
A multilayer laminated film such as an aluminum-deposited polyethylene terephthalate film / linear low-density polyethylene layer laminated film, a biaxially stretched nylon film / linear low-density polyethylene layer laminated film, or a linear low-density polyethylene monolayer. Layer films and the like are used.
【0003】このようなフィルムで形成される包装袋に
米穀類を充填包装する場合、通常、縦型の充填包装機が
使用され、充填後トップシールする際、ヘッドスペース
部にできるだけ空気を残さないよう、両側からスポンジ
ゴムなどの治具を機械的に押しつけて脱気包装する方法
が採られている。しかし、内容物が米穀類の場合、重量
物であり、封入後の包装体を集積し、積み上げた時、下
部の包装体には大きな荷重が掛かるため、前記の脱気程
度では不充分であり、尚残留する空気により内圧が上昇
し、破袋を発生する問題がある。このため包装袋には、
更に残留する余分な空気を逃がすために、孔径1〜2m
mの孔や、長さ2mm程度の切り込みを適当数設けた
り、或いは、袋がピロー形式の場合、背シール部の一部
に不織布のテープを貼るなどの対策が講じられている。[0003] When filling and packaging rice grains in a packaging bag formed of such a film, a vertical filling and packaging machine is usually used. When top sealing is performed after filling, as much air as possible is left in the head space. As described above, a method of mechanically pressing a jig such as sponge rubber from both sides to perform deaeration packaging is adopted. However, when the content is rice grains, it is a heavy weight, and when the packed packages after encapsulation are stacked and piled up, a large load is applied to the lower package, so the above deaeration is not sufficient. However, there is a problem that the internal pressure rises due to the remaining air, which causes bag breakage. Therefore, in the packaging bag,
Further, to release excess air that remains, a hole diameter of 1-2 m
Measures are taken such as providing an appropriate number of m holes or notches having a length of about 2 mm, or sticking a non-woven tape to a part of the back seal portion when the bag is a pillow type.
【0004】[0004]
【発明が解決しようとする課題】上記の従来技術におい
ては、例えば、孔径1〜2mmの孔を包装袋に設けた場
合、袋内の余分の空気を逃がすためには充分な大きさで
あり、1袋当たりに開孔する数も僅かでよく、それによ
る袋強度の低下も問題にはならない。しかし、孔径が1
〜2mmの場合、コクゾウ、ココクゾウ等の害虫が開孔
部から侵入し、米など内容物を食い荒らす問題があっ
た。また、長さ2mm程度の切り込みを設ける場合は、
切り込み口から裂けて切れ目が大きくなり易く、大きく
なった場合には、上記と同様、虫害の問題や、内容物の
こぼれの問題も発生する。そして、背シール部に不織布
のテープを貼る方法では、通常の脱気性は優れている
が、実際に内容物を充填包装して集積し、積み上げた場
合、テープ貼りの部分が押しつぶされた状態になり、袋
内に残留する空気の脱気性が低下する。また、この形態
の袋の場合、部材が増え、その取り付けなど加工度も上
がるため、コスト面で高価となる欠点もある。In the above-mentioned prior art, for example, when a hole having a hole diameter of 1 to 2 mm is provided in a packaging bag, it is large enough to allow excess air in the bag to escape, The number of holes to be opened per bag may be small, and the decrease in bag strength due to this is not a problem. However, if the hole diameter is 1
In the case of ˜2 mm, there was a problem that harmful insects such as kouzo, kouzo elephant, etc. invaded from the openings to eat the contents such as rice. Also, when making a notch with a length of about 2 mm,
The cut tends to be large due to tearing from the notch, and when it becomes large, problems of insect damage and spilling of the contents occur as in the above case. And, in the method of pasting the non-woven tape on the spine seal part, the usual deaeration is excellent, but when the contents are actually filled and packed and accumulated and piled up, the tape pasted part is crushed. Therefore, the deaeration property of the air remaining in the bag is reduced. Further, in the case of this form, the number of members is increased, and the degree of processing such as attachment thereof is increased, so that there is also a drawback that the cost is high.
【0005】本発明は、上記のような問題点に鑑みてな
されたものであり、その目的とするところは、脱気用に
複数の孔が設けられたプラスチックフィルム製の米穀類
用包装袋において、その開孔部の脱気性能が、実際の使
用においても損なわれることなく有効に発揮され、ま
た、開孔による袋の強度低下の問題も発生せず、更に、
コクゾウなど害虫の侵入も防止できるという性能に優れ
た米穀類用包装袋を生産性よく提供することにある。The present invention has been made in view of the above problems, and an object thereof is to provide a plastic film packaging bag for rice grains made of a plastic film having a plurality of holes for deaeration. , The degassing performance of the opening is effectively exhibited without being impaired in actual use, and the problem of the strength of the bag is not reduced due to the opening.
An object of the present invention is to provide a packaging bag for rice grains, which is excellent in the ability to prevent invasion of harmful insects such as elephant elephant, with high productivity.
【0006】[0006]
【課題を解決するための手段】上記の課題を解決するた
め鋭意研究した結果、コクゾウやココクゾウ等の害虫の
侵入を防ぐためには、包装袋に設ける孔の孔径(孔が円
形でない場合は最大部分の径)を1000μm以下にす
ること。そして、孔の数は、内容物を封入した包装体を
積み重ねた際に、内部に残留する空気の内圧で破袋が生
じない程度に速やかに脱気できることが好ましく、孔径
に応じて複数の孔を開孔させる必要があること。また、
孔を開けることによる包装袋の強度低下をできるだけ小
さくし、且つ、良好な脱気性を得るためには、孔の間隔
を5〜10mmの範囲に保ち、必要な孔数を確保すれば
よいこと。更に、孔を開ける位置についても、内容物を
封入した包装体を積み重ねた際、包装体同士が重なり、
孔が塞がれる位置では脱気の効果が損なわれるため、隣
接する包装体と接触し難い端部近辺に設けることが有効
であることなどの知見を得、これを基に、種々の条件で
開孔部を設けた所定の寸法の包装袋に、実際に所定の量
の内容物を封入し、パレット上に積み重ねる実験を繰り
返し、検討することにより本発明の完成に至ったもので
ある。[Means for Solving the Problems] As a result of intensive research to solve the above problems, as a result, in order to prevent the invasion of harmful insects such as foxtail and foxtail, the diameter of the holes provided in the packaging bag (if the holes are not circular, the maximum diameter is Diameter) of 1000 μm or less. The number of holes is preferably such that when the packages with the contents enclosed are stacked, it can be quickly degassed so as not to cause bag breakage due to the internal pressure of the air remaining inside. Need to be opened. Also,
In order to minimize the reduction in strength of the packaging bag due to the opening of holes and to obtain good deaeration, it is sufficient to keep the distance between the holes within the range of 5 to 10 mm and to secure the necessary number of holes. Furthermore, regarding the position where the holes are made, when the packages enclosing the contents are stacked, the packages overlap each other,
Since the degassing effect is impaired at the position where the hole is blocked, it was found that it is effective to provide it near the edge where it is difficult to contact the adjacent packaging body, and based on this, under various conditions The present invention has been completed by repeating and studying an experiment in which a predetermined amount of contents are actually enclosed in a packaging bag having a predetermined size and an opening is provided and the contents are stacked on a pallet.
【0007】即ち、請求項1に記載の発明は、プラスチ
ックを主とするフィルムを袋状に熱接着してなる包装袋
であって、該包装袋が孔径100〜1000μmの複数
の孔を有することを特徴とする米穀類用包装袋からな
る。また、請求項2に記載の発明は、前記包装袋の複数
の孔が、包装袋に米穀類を封入して積み重ねた時に、積
み重ねた包装袋で互いに塞がれない包装袋の端部の領域
に設けられていることを特徴とする請求項1に記載の米
穀類用包装袋からなる。そして、請求項3に記載の発明
は、前記包装袋のフィルムが多層積層フィルムであっ
て、且つ、包装袋の複数の孔が、レーザー光の照射によ
り開孔された孔であることを特徴とする請求項1または
2に記載の米穀類用包装袋からなる。That is, the invention described in claim 1 is a packaging bag formed by heat-bonding a film mainly made of plastic in a bag shape, and the packaging bag has a plurality of holes having a hole diameter of 100 to 1000 μm. And a packaging bag for rice grains. Further, the invention according to claim 2 is an area of an end portion of the packaging bag in which the plurality of holes of the packaging bag are not blocked by the stacked packaging bags when the rice grains are enclosed and stacked in the packaging bag. The packaging bag for rice grains according to claim 1, wherein the packaging bag is for rice grains. Further, the invention according to claim 3 is characterized in that the film of the packaging bag is a multilayer laminated film, and the plurality of holes of the packaging bag are holes opened by irradiation of laser light. The packaging bag for rice grains according to claim 1 or 2.
【0008】[0008]
【発明の実施の形態】以下に本発明の米穀類用包装袋の
実施の形態について説明する。本発明の米穀類用包装袋
に用いるフィルムは、基本的には特に限定されず、従
来、米穀類用包装袋に用いられているプラスチックの単
層または多層積層フィルムは、いずれも使用することが
できる。具体的には、前記したように多層積層フィルム
では、2軸延伸ナイロンフィルム/接着層/アルミ蒸
着2軸延伸ポリエチレンテレフタレートフィルム/接着
層/直鎖状低密度ポリエチレン層、2軸延伸ナイロン
フィルム/接着層/直鎖状低密度ポリエチレン層などの
積層フィルムが多用され、また、直鎖状低密度ポリエ
チレンなどの単層フィルムも使用できる。(以下、2軸
延伸ナイロンフィルムはON、2軸延伸ポリエチレンテ
レフタレートフィルムはPET、直鎖状低密度ポリエチ
レンはLLDPEと略記する。)BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the rice cereal packaging bag of the present invention will be described below. The film used for the packaging bag for rice grains of the present invention is basically not particularly limited, and any single-layer or multilayer laminated film of plastic conventionally used for packaging bags for rice grains can be used. it can. Specifically, as described above, in the multilayer laminated film, biaxially stretched nylon film / adhesive layer / aluminum deposited biaxially stretched polyethylene terephthalate film / adhesive layer / linear low-density polyethylene layer, biaxially stretched nylon film / adhesive A laminated film such as layer / linear low-density polyethylene layer is often used, and a single-layer film such as linear low-density polyethylene can also be used. (Hereinafter, the biaxially stretched nylon film is abbreviated as ON, the biaxially stretched polyethylene terephthalate film is abbreviated as PET, and the linear low-density polyethylene is abbreviated as LLDPE.)
【0009】上記において、ONとアルミ蒸着PETの
ようなフィルム同士の積層にはドライラミネート法、ま
たは接着性樹脂を用いる押し出しラミネート法が利用で
き、また、アルミ蒸着PETやON面へのLLDPE層
の積層は、フィルム状にしたLLDPEをドライラミネ
ート法で積層してもよく、LLDPE樹脂を押し出しコ
ートして積層してもよい。また、の構成のアルミ蒸着
は、不要な場合には除いてもよい。このようにアルミ蒸
着層が不要な場合には、の構成に限らず、において
も、全層を多層共押し出し法により積層フィルム化して
もよく、更に、、、のいずれにおいても多層また
は単層のインフレーション成形により、直接、所定の折
り径のチューブを作成し、チューブ(底シール)形式の
包装袋としてもよい。In the above, dry laminating method or extrusion laminating method using an adhesive resin can be used for laminating films such as ON and aluminum vapor-deposited PET, and aluminum vapor-deposited PET or LLDPE layer on the ON surface can be formed. For lamination, film-shaped LLDPE may be laminated by a dry lamination method, or LLDPE resin may be extrusion-coated to laminate. In addition, the aluminum vapor deposition having the above structure may be omitted if unnecessary. When the aluminum vapor-deposited layer is not required as described above, not only the constitution but also all the layers may be formed into a laminated film by a multi-layer co-extrusion method. A tube having a predetermined folding diameter may be directly formed by inflation molding to form a tube (bottom seal) type packaging bag.
【0010】本発明の米穀類用包装袋は、これらのフィ
ルムを袋状に熱接着して製造される包装袋に、米穀類を
封入後、集積し、積み重ねた際に、袋内に残留する空気
により内圧が急激に上昇し破袋することを防ぐため、内
部の空気を外に逃がす(脱気する)ための孔を、所定の
位置に、所定の大きさと間隔をもって、必要な数で設け
ることを特徴としており、以下、これらについて説明す
る。The rice grain packaging bag of the present invention remains in the bag when rice grains are packed, accumulated and stacked in a packaging bag produced by heat-bonding these films into a bag shape. To prevent the bag from rupturing due to a sudden increase in the internal pressure caused by air, holes are provided at the specified positions, at the specified size and at the required intervals, to allow the internal air to escape to the outside (degassing). The feature is that these will be described below.
【0011】先ず、本発明の包装袋において、使用でき
る袋の形態は、特に限定されず、例えば、従来、米穀類
用包装袋に主に用いられている三方シール形式、ピロー
形式、或いは、インフレーション成形によるチューブ
(底シール)形式など、いずれも使用できる。そして、
包装袋に設ける脱気用の孔の位置は、通常、包装袋に内
容物を封入後、袋を寝かせて集積し、積み重ねているた
め、この状態で上下、左右などに隣接する包装体によっ
て、設けた孔が塞がれないよう、例えば、袋の両側端部
の側面(湾曲面)などに設けることが好ましい。First, in the packaging bag of the present invention, the form of the bag that can be used is not particularly limited. For example, a three-sided seal type, a pillow type, or an inflation type, which has been mainly used in conventional packaging bags for rice grains. Any form such as a molded tube (bottom seal) type can be used. And
The position of the deaeration hole provided in the packaging bag is usually because after stacking the contents in the packaging bag and stacking the bags by stacking them up and down, in this state, the packaging bodies adjacent to each other vertically, horizontally, etc. It is preferable that the holes are provided, for example, on the side surfaces (curved surfaces) of both end portions of the bag so as not to block the provided holes.
【0012】具体的には、袋の寸法と内容物の充填量に
よって、袋の端部(側面)の寸法も変動するため、一律
に数値で指定することは難しいが、例えば、寸法340
mm(幅)×570mm(長さ)の袋に10kgの米を
封入した場合で、ピロー形式またはチューブ形式の包装
袋では、左右両側の端より5mmから、40mm程度の
範囲の領域、また、三方シール形式の包装袋では、左右
両側シールしろを除いた両端より5mmから、40mm
程度の範囲の領域に孔を設けることが好ましい。同様
に、寸法280mm(幅)×470mm(長さ)の袋に
5kgの米を封入した場合、および、寸法220mm
(幅)×350mm(長さ)の袋に2kgの米を封入し
た場合では、左右両側の端より5mmから、30mm程
度の範囲の領域に孔を設けることが好ましい。Specifically, the size of the end portion (side surface) of the bag varies depending on the size of the bag and the filling amount of the contents, so it is difficult to uniformly specify a numerical value, but for example, the size 340.
When 10 kg of rice is packed in a bag of mm (width) x 570 mm (length), and in a pillow type or tube type packaging bag, an area in the range of 5 mm to 40 mm from the left and right ends, and three sides With a seal type packaging bag, 5 mm to 40 mm from both ends excluding the left and right seal margins
It is preferable to provide holes in a region within a certain range. Similarly, when 5 kg of rice is enclosed in a bag having a size of 280 mm (width) x 470 mm (length), and a size of 220 mm
When 2 kg of rice is enclosed in a bag of (width) × 350 mm (length), it is preferable to provide holes in a region of about 5 mm to 30 mm from the left and right ends.
【0013】包装袋に設ける孔の大きさは、袋内の空気
を速やかに脱気させるためには孔径が大きい方が好まし
い。しかし、大きすぎると、害虫の侵入、内容物のこぼ
れ、袋強度の低下などの不都合を生じ、特に害虫の侵入
を防ぐ点から、上限として孔径(孔が円形でない場合は
最大部分の径)は1000μm以下にすることが好まし
い。そして、孔径の下限は、上限ほど厳密ではないが、
小さすぎると脱気速度が低下するため、孔の数を多くす
る必要を生じ、これに伴って孔と孔の間隔も小さくな
る。これは結果として袋強度の低下を招くと共に、開孔
の作業性も低下させる。従って、孔径の下限は100μ
m程度にすることが好ましい。以上の理由から、包装袋
に設ける孔は、孔径100〜1000μmの範囲が好ま
しく、150〜300μmの範囲が更に好ましい。The size of the holes provided in the packaging bag is preferably large so that the air in the bag can be quickly degassed. However, if it is too large, inconveniences such as invasion of pests, spillage of contents, and deterioration of bag strength will occur, and in particular, from the viewpoint of preventing invasion of pests, the upper limit of the pore diameter (when the holes are not circular, the maximum diameter) is It is preferably 1000 μm or less. And although the lower limit of the pore size is not as strict as the upper limit,
If it is too small, the degassing rate will decrease, so that it is necessary to increase the number of holes, and accordingly, the distance between the holes also decreases. As a result, the bag strength is reduced and the workability of the opening is also reduced. Therefore, the lower limit of pore size is 100μ
It is preferably about m. For the above reasons, the holes provided in the packaging bag preferably have a hole diameter of 100 to 1000 μm, more preferably 150 to 300 μm.
【0014】そして、孔と孔の間隔は、例えば、脱気性
をよくするために孔の数を多くしようとすると、間隔を
小さくする必要があり、間隔が小さくなりすぎると包装
袋の強度が低下する。また、間隔を大きくすると強度面
の問題はないが、孔の数が減少することになり、必要な
脱気性を得るためには、孔の径を大きくする必要を生
じ、孔径を大きくし過ぎる(1000μmを超える)と
前述したように、害虫の侵入の問題がある。従って、孔
と孔の間隔も一定の範囲に調整することが好ましく、具
体的には、5mm〜10mmの範囲であることが好まし
い。孔の間隔が5mm未満の場合、内容物の重量が5k
gまでは強度的にも問題ないが、重量が10kgになる
と、強度不足となり、落下衝撃などにより孔間が引き裂
かれ、破袋の原因になる。また、孔の間隔が10mmを
超える場合は、強度低下の問題はなく下限程厳密ではな
いが、1袋当たりの孔の数が少なくなり、場合によって
は、孔径1000μm以上の孔が必要となるため、害虫
の侵入を許すことになり好ましくない。尚、孔と孔の間
隔と、孔径との関係は、前記の条件を満たす範囲であれ
ばよく、特に限定はされない。Regarding the space between the holes, for example, if the number of holes is increased in order to improve the deaerating property, it is necessary to reduce the space, and if the space is too small, the strength of the packaging bag decreases. To do. Further, if the interval is increased, there is no problem in terms of strength, but the number of holes is reduced, and in order to obtain the necessary degassing property, it is necessary to increase the diameter of the holes, and the diameter of the holes is too large ( As described above, there is a problem of pest invasion. Therefore, it is preferable that the distance between the holes is also adjusted within a certain range, and specifically, the range of 5 mm to 10 mm is preferable. If the distance between the holes is less than 5mm, the weight of the contents is 5k
Although there is no problem in strength up to g, when the weight is 10 kg, the strength becomes insufficient and the spaces between the holes are torn due to a drop impact or the like, which causes bag breakage. Further, when the distance between the holes is more than 10 mm, there is no problem of strength reduction and it is not as strict as the lower limit, but the number of holes per bag is small, and in some cases, holes having a diameter of 1000 μm or more are required. However, it is not preferable because it allows the invasion of pests. Note that the relationship between the hole spacing and the hole diameter may be within the range that satisfies the above conditions, and is not particularly limited.
【0015】上記のような孔を設ける方法は、従来品の
ように孔径が1〜2mmと大きい場合は、通常のパンチ
ングによる方法でも開孔できるが、本発明のように孔径
が100〜1000μmと小さい場合には、加熱針など
による方法が好ましく適用できる。また、包装袋に充填
される内容物の量が、5kg、10kgと多い場合は、
袋の強度を強くする必要があり、大抵の場合、前記した
ような多層積層フィルムが使用される。このように包装
袋が、ナイロンやポリエチレンテレフタレートなどの層
を含む多層積層フィルムで形成される場合には、孔を設
ける方法として、レーザー光の照射による方法が、更に
好ましく適用できる。In the method of forming the holes as described above, when the hole diameter is as large as 1 to 2 mm as in the conventional product, the hole can be opened by the ordinary punching method, but the hole diameter is 100 to 1000 μm as in the present invention. When it is small, a method using a heating needle or the like can be preferably applied. If the amount of contents filled in the packaging bag is as large as 5 kg or 10 kg,
It is necessary to increase the strength of the bag, and in most cases, a multilayer laminated film as described above is used. When the packaging bag is thus formed of a multilayer laminated film including layers such as nylon and polyethylene terephthalate, a method of irradiating laser light can be more preferably applied as a method of forming holes.
【0016】上記レーザー光による積層フィルムへの孔
あけには、パルス発振タイプのレーザー照射を用いる
が、マイクロ秒のオーダーでオン・オフ制御ができるレ
ーザーであれば、スポット状、切り込み状などの断続的
な孔あけ加工が可能である。レーザーの種類は、炭酸ガ
スレーザー、YAGレーザー、半導体レーザー、アルゴ
ンイオンレーザーなどが利用可能であり、特に限定はさ
れないが、フィルムに孔をあけるためには、フィルムが
レーザー発振波長を吸収して発熱し、ミスト化すること
が必要であり、この点から炭酸ガスレーザーが特に好適
に使用できる。The laser irradiation of the pulse oscillation type is used for perforating the laminated film with the above laser beam, but if the laser is capable of on / off control in the order of microseconds, it is intermittent in the form of spots, notches, etc. Drilling is possible. A carbon dioxide gas laser, a YAG laser, a semiconductor laser, an argon ion laser, or the like can be used as the type of laser, and there is no particular limitation, but in order to make a hole in the film, the film absorbs the laser oscillation wavelength and generates heat. However, it is necessary to form a mist, and from this point, a carbon dioxide gas laser can be particularly preferably used.
【0017】炭酸ガスレーザー光の波長は10.6μm
であり、包装材料として汎用されるナイロン、ポリエチ
レンテレフタレート、ポリプロピレンなど多くのフィル
ムは、これを吸収し、発熱するため開孔可能であるが、
低密度ポリエチレンフィルムは、殆ど吸収せず透過して
しまうため開孔不可能である。しかし、低密度ポリエチ
レンが、上記のような炭酸ガスレーザー光を吸収するフ
ィルムと積層され、積層フィルムとして用いられている
場合には、その積層フィルムに炭酸ガスレーザー光を出
力調整して照射することにより、これを吸収する層が発
熱し、その熱により低密度ポリエチレン層も同時に開孔
させることができる。このようなレーザー光を孔あけの
手段として用いることにより、孔径が数10μmから1
000μmの小さな孔であっても、安定した孔径で、生
産性よく開孔することができ、また、孔径や孔間隔の変
更も容易に行える利点がある。The wavelength of carbon dioxide laser light is 10.6 μm
Many films such as nylon, polyethylene terephthalate, and polypropylene, which are widely used as packaging materials, can absorb this and generate heat, but can be opened.
A low-density polyethylene film cannot be perforated because it is hardly absorbed and penetrates. However, when low-density polyethylene is laminated with a film that absorbs carbon dioxide gas laser light as described above and is used as a laminated film, the carbon dioxide laser light should be output adjusted and irradiated on the laminated film. As a result, the layer that absorbs this heat is generated, and the heat can simultaneously open the low density polyethylene layer. By using such a laser beam as a means for making a hole, the hole diameter is from several tens of μm to 1 μm.
Even a small hole of 000 μm has an advantage that it can be opened with a stable hole diameter and high productivity, and that the hole diameter and the hole interval can be easily changed.
【0018】[0018]
【実施例】以下に、図面、および実施例を挙げて本発明
を更に具体的に説明する。但し、本発明はこれらに限定
するものではない。図1は、本発明の米穀類用包装袋の
一実施例の構造を説明する模式平面図である。図1に示
した米穀類用包装袋10は、米などを充填・包装し、流通
させるために用いるピロー形式の包装袋の例を示してお
り、通常、ロール状の積層フィルムを引出し、加熱針ま
たはレーザー光の照射により、脱気用の複数の孔を、好
ましい孔あけ領域3a 、3b 、4a 、4b として示した
領域内に、孔径(最大部分の径)100〜1000μ
m、孔間隔5〜10mmの範囲の条件で、積層フィルム
の流れ方向に沿って設けた後、積層フィルムのシーラン
ト層を内側として左右両側を袋が所定の幅になるように
折り返し、略中央部で両端を合掌貼り形式で熱接着させ
て背シール部1を形成して筒状体とし、更に、背シール
部を寝かせてフラットな状態とし、流れ方向に対して所
定のピッチで底シール部2を熱接着して形成すると共
に、底シール部2の直ぐ後ろをカットして個々の包装袋
を作成するものである。尚、図1に記入した包装袋の寸
法は、米10kgを充填包装する場合の例で示した。参
考迄に米用包装袋の標準寸法を示すと下記の通りであ
る。 10kg用 340mm(幅)×570mm 5kg用 280mm(幅)×470mm 2kg用 220mm(幅)×350mmThe present invention will be described in more detail below with reference to the drawings and examples. However, the present invention is not limited to these. FIG. 1 is a schematic plan view for explaining the structure of an embodiment of the rice grain packaging bag of the present invention. The packaging bag 10 for rice grains shown in FIG. 1 shows an example of a pillow type packaging bag used for filling and packaging rice and distributing it. Usually, a roll-shaped laminated film is pulled out and heated. Alternatively, by irradiating with laser light, a plurality of holes for deaeration are formed within the areas shown as preferable hole forming areas 3a, 3b, 4a, and 4b, and the hole diameter (diameter of the maximum portion) is 100 to 1000 μm.
m, with a hole interval of 5 to 10 mm, provided along the flow direction of the laminated film, then folded back so that the bag has a predetermined width on both left and right sides with the sealant layer of the laminated film as the inside At both ends, the back seal portion 1 is formed into a tubular body by heat-bonding in a palm-sealed form, and the back seal portion is laid down to be flat, and the bottom seal portion 2 is formed at a predetermined pitch in the flow direction. Are heat-bonded to each other, and a portion immediately behind the bottom seal portion 2 is cut to form individual packaging bags. The dimensions of the packaging bag shown in FIG. 1 are shown as an example in the case of filling and packaging 10 kg of rice. For reference, the standard dimensions of the rice packaging bag are shown below. For 10 kg 340 mm (width) x 570 mm For 5 kg 280 mm (width) x 470 mm For 2 kg 220 mm (width) x 350 mm
【0019】以下に実施例を挙げて本発明を具体的に説
明する。先ず、米10kgを充填包装するピロー形式の
包装袋を積層フィルムで作成することとし、厚さ15μ
mの2軸延伸ナイロンフィルムと厚さ60μmの直鎖状
低密度ポリエチレンフィルムとを2液反応型ウレタン系
接着剤を用いて、公知のドライラミネーション法で貼り
合わせ、700mm幅の巻取り状の積層フィルムを作成
した。上記積層フィルムに脱気用の複数の孔を設けるた
め、炭酸ガスレーザーを用いて、製袋後の包装袋の上下
両側のフィルムの左右両側の端から、それぞれ2.5c
m内側の位置に、積層フィルムの流れ方向に沿って合計
4列の孔を、表1の実施例1〜7に示した孔径と、孔間
隔で設けた後、これを、折り径(袋の幅)340mm、
背シール幅10mm、底シール幅10mm、袋の全長5
70mmとなるように製袋して、それぞれ実施例1〜7
の包装袋を作成した。尚、各実施例の包装袋の総孔数
(1袋当たりの平均値)は、表1に示した通りである。
また、参考例として、市販の従来タイプの10kg用米
袋の孔あけ状況を表1に併せて示した。The present invention will be specifically described below with reference to examples. First, a pillow-type packaging bag for filling and packaging 10 kg of rice is made of a laminated film and has a thickness of 15 μm.
m biaxially stretched nylon film and a linear low-density polyethylene film having a thickness of 60 μm are pasted together by a known dry lamination method using a two-component reactive urethane adhesive to form a 700 mm-width roll-shaped laminate. I made a film. In order to provide a plurality of holes for degassing in the laminated film, a carbon dioxide gas laser was used to remove 2.5c from the left and right ends of the film on both upper and lower sides of the packaging bag after bag making.
After a total of four rows of holes were provided at the inner side of the m along the flow direction of the laminated film at the hole diameters and the hole intervals shown in Examples 1 to 7 of Table 1, the holes were formed at the folding diameter (of the bag). Width) 340 mm,
Back seal width 10 mm, bottom seal width 10 mm, total bag length 5
The bag was made to have a size of 70 mm, and each of Examples 1 to 7
I made a packaging bag. The total number of holes (average value per bag) of the packaging bags of each example is as shown in Table 1.
Further, as a reference example, Table 1 also shows the state of punching a commercially available conventional type rice bag for 10 kg.
【0020】[0020]
【表1】 [Table 1]
【0021】〔評価および結果〕表1に示した通りの開
孔部を設けた実施例1〜7、および参考例の各包装袋を
試料として、その脱気性、袋の強度、虫侵入の防止性を
評価し、その結果を表2にまとめて示した。尚、試料数
は各10個とした。[Evaluation and Results] Each of the packaging bags of Examples 1 to 7 and the reference example having the openings as shown in Table 1 was used as a sample, and its deaeration, bag strength, and insect invasion were prevented. The sex was evaluated, and the results are summarized in Table 2. The number of samples was 10 each.
【0022】(1)脱気性のテスト 各包装袋にそれぞれ12Lの空気を封入し、1個当たり
5kgの荷重をかけて完全に脱気する迄の時間(秒数)
を測定した。このテストの評価は、参考例を基準とする
相対評価とした。 (記号) (評価基準) ◎:参考例の包装袋(58秒)より脱気の速いもの。 ○:参考例の包装袋と同等(58秒)〜+10秒(合計68秒)迄のもの。 △:参考例の包装袋+11秒(合計69秒)〜+30秒(合計88秒)迄のも の。(このレベルでも落下試験、積み上げテストで破袋などの発生がなく 実用上問題はない。) ×:参考例の包装袋(58秒)より31秒以上脱気の遅いもの(合計89秒以 上かかるもの)。(1) Deaeration test Time (seconds) until 12 L of air is filled in each packaging bag and a 5 kg load is applied to complete deaeration.
Was measured. The evaluation of this test was a relative evaluation based on the reference example. (Symbol) (Evaluation Criteria) ◎: Degassing is faster than the packaging bag (58 seconds) of the reference example. ◯: Same as the packaging bag of the reference example (58 seconds) to +10 seconds (68 seconds in total). Δ: Packaging bag of Reference Example from +11 seconds (69 seconds in total) to +30 seconds (88 seconds in total). (Even at this level, there are no problems such as bag breakage in the drop test and stacking test, and there is no problem in practice.) ×: Degassing slower than 31 seconds than the packaging bag (58 seconds) of the reference example (total 89 seconds or more) Such things).
【0023】(2)包装袋の強度テスト (イ)落下試験 各試料の包装袋にそれぞれ10kgの米を封入し、1m
の高さから垂直、水平、サイド方向に各3回落下させて
破袋の有無を調べた。 (2) Strength test of packaging bag (a) Drop test Each packaging bag of each sample is filled with 10 kg of rice and 1 m
From the height of the bag, the bag was dropped vertically, horizontally, and sideways three times, and the presence or absence of a bag was examined.
【0024】(ロ)積み上げテスト 各試料の包装袋にそれぞれ10kgの米を封入し、パレ
ット上に10個を積み上げて、倉庫に搬送し、3日間保
存後、取り出して破袋の有無を調べた。 (B) Stacking test Each packaging bag of each sample was filled with 10 kg of rice, 10 pieces were stacked on a pallet, transported to a warehouse, stored for 3 days, taken out and examined for the presence of broken bags. .
【0025】(3)虫侵入の防止性 虫侵入の防止性については、参考例の2mmφの孔を設
けた包装袋でも、10kg入りの包装袋で孔の数が8個
と少ないため簡単には侵入しないが、1カ月以上の長期
テストでは虫の侵入が認められるため好ましくない。こ
れに対して、実施例1〜7の包装袋では、孔の数は多い
が孔径自体が1000μm以下と小さいため、虫の侵入
は認められず良好であった。 (以下余白)(3) Prevention of insect invasion With respect to the prevention of insect invasion, even the packaging bag provided with holes of 2 mmφ in the reference example is easy because the number of holes is as small as 8 in a packaging bag containing 10 kg. Although it does not invade, it is not preferable because insect invasion is observed in a long-term test of 1 month or more. On the other hand, in the packaging bags of Examples 1 to 7, the number of holes was large, but the hole diameter itself was as small as 1000 μm or less, so that invasion of insects was not recognized and it was good. (Below margin)
【0026】[0026]
【表2】 評価結果 [Table 2] Evaluation results
【0027】[0027]
【発明の効果】以上詳しく説明したように、本発明によ
れば、袋の強度が損なわれず、且つ、米などの内容物を
封入し、集積し、積み上げた際にも、袋内に残留する余
分な空気をスムーズに外部に放出でき、内圧の上昇によ
る破袋もなく、更に、害虫の侵入も防止できるという性
能に優れた米穀類用包装袋を容易に提供できる効果を奏
する。また、包装袋をプラスチックの積層フィルムで構
成し、レーザー光の照射により、脱気用の孔を開孔させ
ることにより、孔径が数10μmから1000μmの小
孔であっても、安定した孔径の孔を生産性よく開孔する
ことができ、また、孔径や孔間隔の変更も容易であるた
め、異なるサイズの包装袋にも容易に対応でき、性能に
優れた米穀類用包装袋を生産性よく提供できる効果を奏
する。As described above in detail, according to the present invention, the strength of the bag is not impaired, and the contents such as rice remain in the bag when they are packed, accumulated and stacked. The effect that the excess air can be smoothly discharged to the outside, the bag is not broken due to the increase of the internal pressure, and the pests can be prevented from invading, and the rice grain packaging bag having excellent performance can be easily provided. Further, the packaging bag is made of a plastic laminated film, and the holes for deaeration are opened by irradiation with laser light, so that even if the hole diameter is a small hole of several 10 μm to 1000 μm, a hole having a stable hole diameter is formed. Can be opened with high productivity, and it is easy to change the hole diameter and hole spacing, so it can easily accommodate different size packaging bags, and it is possible to improve the productivity of rice grain packaging bags with excellent productivity. There is an effect that can be provided.
【図1】本発明の米穀類用包装袋の一実施例の形態を説
明する模式平面図である。FIG. 1 is a schematic plan view illustrating a form of an embodiment of a packaging bag for rice grains of the present invention.
1 背シール部 2 底シール部 3a 、3b 、4a 、4b 好ましい孔あけ領域10 米穀類用包装袋1 Back seal part 2 Bottom seal part 3a, 3b, 4a, 4b Preferable perforation area 10 Rice grain packaging bag
Claims (3)
に熱接着してなる包装袋であって、該包装袋が孔径10
0〜1000μmの複数の孔を有することを特徴とする
米穀類用包装袋。1. A packaging bag formed by heat-bonding a plastic-based film in a bag shape, the packaging bag having a hole diameter of 10
A packaging bag for rice grains, which has a plurality of holes of 0 to 1000 μm.
類を封入して積み重ねた時に、積み重ねた包装袋で互い
に塞がれない包装袋の端部の領域に設けられていること
を特徴とする請求項1記載の米穀類用包装袋。2. A plurality of holes of the packaging bag are provided in an area of an end portion of the packaging bag which is not blocked by the stacked packaging bags when rice grains are enclosed and stacked in the packaging bag. The packaging bag for rice grains according to claim 1.
ムであって、且つ、包装袋の複数の孔が、レーザー光の
照射により開孔された孔であることを特徴とする請求項
1または2に記載の米穀類用包装袋。3. The film of the packaging bag is a multilayer laminated film, and the plurality of holes of the packaging bag are holes opened by irradiation of laser light. The packaging bag for rice grains described in.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5363396A JPH09221148A (en) | 1996-02-19 | 1996-02-19 | Packaging sack for grain |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5363396A JPH09221148A (en) | 1996-02-19 | 1996-02-19 | Packaging sack for grain |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09221148A true JPH09221148A (en) | 1997-08-26 |
Family
ID=12948317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5363396A Pending JPH09221148A (en) | 1996-02-19 | 1996-02-19 | Packaging sack for grain |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09221148A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007290724A (en) * | 2006-04-24 | 2007-11-08 | Sumitomo Chemical Co Ltd | Packaging method for granular compounded fertilizer |
-
1996
- 1996-02-19 JP JP5363396A patent/JPH09221148A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007290724A (en) * | 2006-04-24 | 2007-11-08 | Sumitomo Chemical Co Ltd | Packaging method for granular compounded fertilizer |
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