JP2600764B2 - Method of manufacturing air-permeable bag - Google Patents
Method of manufacturing air-permeable bagInfo
- Publication number
- JP2600764B2 JP2600764B2 JP4356088A JP4356088A JP2600764B2 JP 2600764 B2 JP2600764 B2 JP 2600764B2 JP 4356088 A JP4356088 A JP 4356088A JP 4356088 A JP4356088 A JP 4356088A JP 2600764 B2 JP2600764 B2 JP 2600764B2
- Authority
- JP
- Japan
- Prior art keywords
- bag
- heat
- film
- porous film
- sheet
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Bag Frames (AREA)
- Making Paper Articles (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は通気性を有する袋の製造法に関する。詳しく
は、内部に吸湿剤や脱臭剤等を収容し、湿気や臭気を吸
収する吸収体等を構成する際に用いる通気性を有する袋
の製造法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a bag having air permeability. More specifically, the present invention relates to a method for manufacturing a breathable bag that contains a moisture absorbent, a deodorant, and the like therein, and that is used for forming an absorber that absorbs moisture and odor.
〔従来の技術及びその課題〕 吸湿剤や脱臭剤等を通気性を有するフィルム等から構
成された袋に収容し、湿気や臭気を吸収する吸収体が知
られている。[Prior art and its problems] There has been known an absorbent body in which a moisture absorbent, a deodorant, and the like are accommodated in a bag made of a film having air permeability and absorb moisture and odor.
このような吸収体を構成する通気性を有するフィルム
としては種々のものが考えられているが、材質や孔の開
き具合によって吸湿された湿気が逆に漏れ出したり、フ
ィルムの強度が弱く、輸送等の際の衝撃で破袋し内容物
が漏れる等の問題があった。Various types of air-permeable films constituting such an absorber are considered, but moisture absorbed due to the material and the degree of opening of the holes may leak in reverse, or the strength of the film may be weak, and the film may be transported. There was a problem that the bag was broken by the impact at the time of etc. and the contents leaked.
本発明者等は通気性を有し、かつ強度的にも優れた通
気性を有する袋を得るべく、種々検討した結果、特定の
製法によって得られた多孔性フィルムを特定の方法で製
袋することにより目的を達成し得ることを見出し、本発
明を完成した。The present inventors have conducted various studies in order to obtain a bag having air permeability and excellent air permeability in terms of strength, and as a result, made a porous film obtained by a specific manufacturing method by a specific method. As a result, it has been found that the object can be achieved, and the present invention has been completed.
本発明の要旨は、ポリオレフィン樹脂に充填剤を配合
してなる組成物を溶融成形して得たフィルム又はシート
を延伸処理して形成した多孔性フィルム又はシートをヒ
ートシールして袋を製造するに当り、内側（芯）がポリ
エステル、外周（鞘）がポリエチレンからなる繊維より
なる不織布をバックシートとして介在させてヒートシー
ルすることを特徴とする通気性を有する袋の製造法に存
する。The gist of the present invention is to manufacture a bag by heat-sealing a porous film or sheet formed by stretching a film or sheet obtained by melt-molding a composition obtained by blending a filler with a polyolefin resin. The present invention resides in a method for producing a breathable bag, which comprises heat-sealing a nonwoven fabric made of a fiber whose inside (core) is made of polyester and whose outer periphery (sheath) is made of polyethylene as a back sheet.
本発明に用いる多孔性フィルム又はシートは、ポリオ
レフィン樹脂に充填剤を配合してなる組成物を溶融成形
して得たフィルム又はシートを延伸処理して形成したも
のである。The porous film or sheet used in the present invention is formed by subjecting a film or sheet obtained by melt-molding a composition obtained by blending a filler to a polyolefin resin to a stretching treatment.
ポリオレフィン樹脂としては、ポリエチレン、ポリプ
ロピレン及びそれらと他のα−オレフィンとの共重合体
等であり、単独及び２種以上の混合物としても用いられ
る。Examples of the polyolefin resin include polyethylene, polypropylene, and copolymers thereof with other α-olefins, and may be used alone or as a mixture of two or more.
充填剤としては、無機及び有機の充填剤が用いられ、
無機充填剤といては、炭酸カルシウム、タルク、クレ
ー、カオリン、シリカ、珪藻土、炭酸マグネシウム、炭
酸バリウム、硫酸マグネシウム、硫酸バリウム、硫酸カ
ルシウム、水酸化アルミニウム、酸化亜鉛、水酸化マグ
ネシウム、酸化カルシウム、酸化マグネシウム、酸化チ
タン、アルミナ、マイカ、アスベスト粉、ガラス粉、シ
ラスバルーン、ゼオライト、珪酸白土等が使用され、特
に炭酸カルシウム、タルク、クレー、シリカ、珪藻土、
硫酸バリウム等が好適である。As the filler, inorganic and organic fillers are used,
Inorganic fillers include calcium carbonate, talc, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, barium carbonate, magnesium sulfate, barium sulfate, calcium sulfate, aluminum hydroxide, zinc oxide, magnesium hydroxide, calcium oxide, and oxide. Magnesium, titanium oxide, alumina, mica, asbestos powder, glass powder, shirasu balloon, zeolite, silicate clay, etc. are used, particularly calcium carbonate, talc, clay, silica, diatomaceous earth,
Barium sulfate and the like are preferred.
有機充填剤としては、木粉、パルプ粉等のセルロース
系粉末等が使用される。これらは単独又は混合して用い
られる。Cellulose-based powders such as wood powder and pulp powder are used as the organic filler. These are used alone or in combination.
充填剤の平均粒径としては、30μ以下のものが好まし
く、10μ以下のものが更に好ましく、１〜５μのものが
最も好ましい。The average particle size of the filler is preferably 30 μm or less, more preferably 10 μm or less, and most preferably 1 to 5 μm.
粒径が大きすぎると延伸物の気孔の緻密性が悪くな
り、又粒径が小さすぎると、樹脂への分散性が悪く、成
形性も劣る。If the particle size is too large, the denseness of the pores of the stretched product will be poor. If the particle size is too small, dispersibility in the resin will be poor and moldability will be poor.
充填剤の表面処理は、樹脂への分散性、更には延伸性
の点で、実施されている事が好ましく、脂肪酸又はその
金属塩での処理が好ましい結果を与える。The surface treatment of the filler is preferably carried out from the viewpoint of dispersibility in a resin and further extensibility, and treatment with a fatty acid or a metal salt thereof gives preferable results.
ポリオレフィン樹脂には上記充填剤に加えて液状又は
ワックス状の炭化水素重合体を配合しても良い。この液
状又はワックス状の炭化水素重合体の添加は微細な開孔
の形成に役立つ。A liquid or waxy hydrocarbon polymer may be blended with the polyolefin resin in addition to the filler. The addition of the liquid or waxy hydrocarbon polymer helps to form fine pores.
液状またはワックス状炭化水素重合体としては、液状
ポリブタジエンおよび液状ポリブテン並びに液状ポリブ
タジエンの水添物が挙げられる。中でも、水酸基末端液
状ポリブタジエンを水素添加したポリヒドロキシ飽和炭
化水素が良好な結果を示す。Examples of the liquid or waxy hydrocarbon polymer include liquid polybutadiene and liquid polybutene, and hydrogenated products of liquid polybutadiene. Among them, polyhydroxy saturated hydrocarbons obtained by hydrogenating hydroxyl group-terminated liquid polybutadiene show good results.
該ポリヒドロキシ飽和炭化水素は、１分子当り少なく
とも1.5個の水酸基を有する主鎖が飽和したまたは大部
分飽和した炭化水素系ポリマーであって、400〜48,00
0、好ましくは500〜20,000の範囲の数平均分子量（蒸気
圧法による）をもつものが好適に用いられる。数平均分
子量が小さすぎると耐候性が十分でなく、また大きすぎ
ると流動性が低下するため取り扱いが困難となる。１分
子当りの平均水酸基数は1.5以上好ましくは1.8以上とく
に好ましくは2.0〜5.0である。そして水酸基は主鎖の末
端、長鎖分岐の末端にあることが好ましい。The polyhydroxy saturated hydrocarbon is a hydrocarbon polymer in which the main chain having at least 1.5 hydroxyl groups per molecule is saturated or mostly saturated, and
Those having a number average molecular weight of 0, preferably in the range of 500 to 20,000 (by vapor pressure method) are suitably used. If the number average molecular weight is too small, the weather resistance is not sufficient, and if the number average molecular weight is too large, the fluidity is reduced and handling becomes difficult. The average number of hydroxyl groups per molecule is 1.5 or more, preferably 1.8 or more, particularly preferably 2.0 to 5.0. The hydroxyl group is preferably at the end of the main chain or at the end of the long chain branch.
しかしてこのようなポリヒドロキシ飽和炭化水素は、
公知の方法、例えば過酸化水素等を重合開始剤として、
ブタジエン単独あるいは共重合性モノマーとをラジカル
重合して得られるブタジエン系液状重合体を水素添加す
ることによって得られる。共重合モノマーとしてはイソ
プレン、クロロプレン、スチレン、メチル（メタ）アク
リレート、メチルビニルエーテル等が挙げられる。Thus, such polyhydroxy saturated hydrocarbons
Known methods, for example, using hydrogen peroxide or the like as a polymerization initiator,
It is obtained by hydrogenating a butadiene-based liquid polymer obtained by radical polymerization of butadiene alone or a copolymerizable monomer. Examples of the copolymerizable monomer include isoprene, chloroprene, styrene, methyl (meth) acrylate, and methyl vinyl ether.
水素添加はニッケル系触媒（例えば還元ニッケル、ラ
ネーニッケル）、コバルト系触媒、白金触媒、パラジウ
ム触媒、ロジウム触媒、ルテニウム触媒、これらの混合
又は合金系触媒を使用して通常の方法で実施される。The hydrogenation is carried out by a conventional method using a nickel-based catalyst (for example, reduced nickel, Raney nickel), a cobalt-based catalyst, a platinum catalyst, a palladium catalyst, a rhodium catalyst, a ruthenium catalyst, a mixture thereof, or an alloy-based catalyst.
末端に極性基のあるもののポリオレフィン樹脂、充填
剤系への導入は、両者の相溶性を向上させる上で好まし
い結果を与えるものと推定される。It is presumed that introduction of a polar group at the terminal into a polyolefin resin or filler system gives a favorable result in improving the compatibility between the two.
なお、前記ポリオレフィン樹脂には、常法に従い熱及
び紫外線安定剤、顔料、帯電防止剤、螢光剤等を添加し
ても差支えない。The polyolefin resin may be added with a heat and ultraviolet stabilizer, a pigment, an antistatic agent, a fluorescent agent, and the like according to a conventional method.
この組成物の配合割合は、ポリオレフィン樹脂100重
量部に対して充填剤25〜400重量部、必要に応じ液状又
はワックス状の炭化水素重合体１〜100重量部が好まし
い。The compounding ratio of this composition is preferably 25 to 400 parts by weight of a filler with respect to 100 parts by weight of a polyolefin resin, and 1 to 100 parts by weight of a liquid or waxy hydrocarbon polymer as required.
ポリオレフィン樹脂と、充填剤、そして必要に応じて
添加される液状又はワックス状炭化水素重合体の配合
は、３者を通常のブレンダー又は混合機に入れ、混合す
ればよい。The compounding of the polyolefin resin, the filler, and the liquid or waxy hydrocarbon polymer added as necessary may be performed by mixing the three components into a common blender or mixer.
次に、混合物の混練には従来公知の装置、例えば、通
常のスクリュー押出機、二軸スクリュー押出機、ミキシ
ングロール、バンバリーミキサー、二軸型混練機等によ
り適宜実施される。Next, kneading of the mixture is appropriately performed by a conventionally known device, for example, a usual screw extruder, a twin-screw extruder, a mixing roll, a Banbury mixer, a twin-screw kneader, or the like.
フィルム又はシートの成形については、通常のフィル
ム又はシートの成形装置及び成形方法に準じて行えば良
く、円形ダイによるイソフレーション成形、Ｔダイによ
るＴダイ成形等を適宜採用すれば良い。The molding of the film or sheet may be performed according to a usual film or sheet molding apparatus and molding method, and any suitable method such as isoflation molding with a circular die and T-die molding with a T die may be employed.
延伸処理は一軸延伸でも二軸延伸でも良いが、多孔化
が達成されるために少なくとも1.1倍の延伸倍率である
ことが好ましい。The stretching treatment may be uniaxial stretching or biaxial stretching, but is preferably at least 1.1 times the stretching ratio in order to achieve porosity.
このような多孔性フィルム又はシートは、通気性およ
び透湿性があり、水は浸透させない程度の微細な開孔が
形成されている。従って、このフィルム又はシートを構
成要素とする袋は通気性および透湿性を有することか
ら、例えば袋内に吸収剤として吸湿剤等を収容すれば袋
外の湿気を吸収し、また例えば脱臭剤とすれば袋外の臭
気を吸収する。特に、前者の場合即ち吸湿剤を袋内に入
れた場合吸収された湿気が水となって袋内に溜まったと
き、この多孔性フィルム又はシートが非透水性に優れて
いることから、水が袋外に浸透することはまったくな
い。この多孔質フィルム又はシートに多数の微細な穴が
形成されていることは既に説明したが、この穴の径は0.
1〜10μｍで、該フィルム又はシートの透湿性は1000〜4
500g・H2O/cm2・24hr,通気性は300〜2000sec/100ccであ
る。このフィルム又はシートを吸収体の袋として使用す
る場合には、その穴の径が0.1〜３μｍ、透湿性が2000
〜3000g・H2O/cm2・24hr,また通気性が600〜1000sec/10
0ccのものを使用することが好ましい。Such a porous film or sheet has air permeability and moisture permeability, and has fine openings that do not allow water to permeate. Therefore, since the bag having the film or sheet as a component has air permeability and moisture permeability, for example, if a bag contains a desiccant or the like as an absorbent, the bag absorbs moisture outside the bag, and also has a deodorant, for example. Absorb the odor outside the bag. In particular, in the former case, that is, when the absorbed moisture becomes water and accumulates in the bag when the hygroscopic agent is placed in the bag, the porous film or sheet has excellent water impermeability. It never penetrates outside the bag. Although it has already been described that a number of fine holes are formed in this porous film or sheet, the diameter of the holes is 0.
1 to 10 μm, the film or sheet has a moisture permeability of 1000 to 4
500g · H 2 O / cm 2 · 24hr, air permeability is 300-2000sec / 100cc. When this film or sheet is used as a bag for an absorber, the hole diameter is 0.1 to 3 μm, and the moisture permeability is 2,000.
~ 3000g ・ H 2 O / cm 2・ 24hr, air permeability 600 ~ 1000sec / 10
It is preferable to use a 0 cc one.
このように、上記した多孔性フィルム又はシートは、
通常10〜200μｍの厚さのものであり、通気性等に特異
の効果を有するが、フィルム強度、特に製袋時に形成さ
れるヒートシール部分の強度が弱いと云う問題がある。Thus, the porous film or sheet described above,
Usually, it has a thickness of 10 to 200 μm and has a specific effect on air permeability and the like, but there is a problem that the strength of the film, particularly the strength of the heat seal portion formed at the time of bag making is weak.
本発明においては、この多孔性フィルム又はシートを
ヒートシールするに際し、特異のヒートシール方法を用
いる。In the present invention, when heat-sealing the porous film or sheet, a specific heat-sealing method is used.
そのヒートシール方法とは、内側（芯）がポリエステ
ル、外周（鞘）がポリエチレンからなる繊維よりなる不
織布を多孔性フィルムのバックシートとして用いてヒー
トシールするものである。The heat-sealing method is a method of heat-sealing using a nonwoven fabric made of a fiber whose inside (core) is made of polyester and whose outer periphery (sheath) is made of polyethylene as a back sheet of a porous film.
すなわち、ヒートシール後の袋の構成としては一般的
には、不織布／多孔性フィルム／多孔性フィルム／不織
布の構成となる。That is, the configuration of the bag after heat sealing generally has a configuration of nonwoven fabric / porous film / porous film / nonwoven fabric.
本発明の不織布とは、内側（芯）がポリエステル、外
周（鞘）がポリエチレンからなる繊維よりなる不織布で
ある。The nonwoven fabric of the present invention is a nonwoven fabric in which the inside (core) is made of polyester and the outer periphery (sheath) is made of polyethylene.
不織布中のポリエチレンの融点は80〜170℃程度のも
のを用いるのが良い。通常多孔性フィルムの融点とほぼ
同じかそれより低いものを選択するのが良い。It is preferable to use polyethylene having a melting point of about 80 to 170 ° C. in the nonwoven fabric. Usually, it is better to select a film having a melting point approximately equal to or lower than the melting point of the porous film.
内側（芯）がポリエステル、外周（鞘）がポリエチレ
ンからなる繊維よりなる不織布は厚さ５〜100μ程度、
秤量５〜100g/m2程度のものが好適に使用し得る。The nonwoven fabric made of a fiber whose inner (core) is made of polyester and whose outer periphery (sheath) is made of polyethylene is about 5 to 100 μm thick,
Those having a weighing of about 5 to 100 g / m 2 can be suitably used.
多孔質フィルムのバックシートとして内側（芯）がポ
リエステル、外周（鞘）がポリエチレンからなる繊維よ
りなる不織布を使用する場合、単に重ね合せて使用する
か、又は、接着剤を用い貼り合わせて使用することもで
きる。この場合、接着剤は多孔性フィルムの全面に塗布
すると通気性を阻害する場合もあるので、点状、線状に
塗布し、部分的に貼り合せるのが良い。When a non-woven fabric made of a fiber whose inner (core) is made of polyester and whose outer periphery (sheath) is made of polyethylene is used as the back sheet of the porous film, they are used simply by being overlapped or bonded by using an adhesive. You can also. In this case, if the adhesive is applied to the entire surface of the porous film, the air permeability may be impaired. Therefore, it is preferable to apply the adhesive in a dotted or linear shape and partially bond the adhesive.
内側（芯）がポリエステル、外周（鞘）がポリエチレ
ンからなる繊維よりなる不織布の積層は、ヒートシール
する側とは反対側とするのが、網状体の効果を生かす上
で望ましい。The lamination of the nonwoven fabric made of a fiber whose inner side (core) is made of polyester and whose outer side (sheath) is made of polyethylene is preferably on the side opposite to the side to be heat-sealed in order to make use of the effect of the net.
なお、袋内に収容される吸収剤において、これを吸湿
剤とする場合には例えば塩化カルシウム、シリカゲル、
ゼオライト、イオン交換樹脂などがある。また、このよ
うな吸湿剤と共に防虫剤或いは芳香剤を入れて組合せ使
用をすることもできる。この防虫剤や芳香剤は前述の多
孔性フィルム又はシートに含浸させて使用することもよ
い。In the case of using an absorbent stored in the bag as a moisture absorbent, for example, calcium chloride, silica gel,
There are zeolites and ion exchange resins. Insect repellents or fragrances may be added together with such a hygroscopic agent to use in combination. This insect repellent or fragrance may be used by impregnating the above-mentioned porous film or sheet.
更に、吸収剤において、これを脱臭剤とする場合には
例えば活性炭、モレゲュラーシーブ、悪臭物質分解性物
質（フタロシアニン、第一鉄・アスコロビン酸等）など
がある。又、これをエチレン吸収剤とする場合には、活
性炭、又は活性炭や合成吸着剤に臭素又は臭素化合物を
付加したものなどがある。また、このような脱臭剤、エ
チレン吸臭剤と共に防虫剤を入れて組合せ使用をするこ
ともできる。Further, in the case where the absorbent is used as a deodorant, there are, for example, activated carbon, molecular sieves, deodorant substances (phthalocyanine, ferrous iron / ascorbic acid, etc.). When this is used as an ethylene absorbent, there are activated carbon or activated carbon or a synthetic adsorbent to which bromine or a bromine compound is added. Further, an insect repellent may be added together with such a deodorant and ethylene deodorant to be used in combination.
以下に実施例を示し、本発明を更に詳細に説明する
が、本発明はその要旨を越えない限り以下の実施例に限
定されるものではない。Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples as long as the gist of the present invention is not exceeded.
実施例１ メルト・インデックスが1.0g/10分、密度が0.918g/cm
3である線状低密度ポリエチレン樹脂〔NOVATEC−Ｕ、FW
20G、三菱化成工業（株）〕3.4kgと炭酸カルシウム（平
均粒径0.9μ、脂肪酸処理）5.8kgを、まずヘンシェルミ
キサー中で撹拌混合し、次いでこれにポリヒドロキシ飽
和炭化水素0.8kgの混合物を得た。Example 1 Melt index: 1.0 g / 10 min, density: 0.918 g / cm
3 is a linear low-density polyethylene resin (NOVATEC-U, FW
20G, Mitsubishi Kasei Kogyo Co., Ltd.] 3.4 kg and calcium carbonate (average particle size 0.9 μm, fatty acid treatment) 5.8 kg were first stirred and mixed in a Henschel mixer, and then a mixture of 0.8 kg of polyhydroxy saturated hydrocarbon was added thereto. Obtained.
該配合操作を10回実施し、最終的に100kgの混合物を
得た。The compounding operation was performed 10 times, and finally 100 kg of a mixture was obtained.
なお、メルト・インデックスはASTM D1238−70によ
り、190℃、荷重2.16kgの時の樹脂の押出量を示し、密
度はASTM D1505に準拠し、密度勾配管法により20℃で求
めたものである。The melt index indicates the amount of resin extruded at 190 ° C. and a load of 2.16 kg according to ASTM D1238-70, and the density is determined at 20 ° C. by a density gradient tube method according to ASTM D1505.
かくして得られた混合物を、二軸混練機DSM−65（日
本製鋼所（株）製）により混練し、造粒した。これを50
mmφ押出機によりインフレーション成形し、厚さ120μ
のフィルムに製膜した。The mixture thus obtained was kneaded with a twin-screw kneader DSM-65 (manufactured by Nippon Steel Works, Ltd.) and granulated. This is 50
Inflation molding by mmφ extruder, thickness 120μ
Was formed into a film.
ここで製膜条件は下記のとおりである。 Here, the film forming conditions are as follows.
押出機シリンダー温度:170−190−190℃ ヘッド、ダイス温度:190−190℃ ブロー比:2.7 かくして得られたフィルムを、ロール延伸機により一
軸延伸し、続いて、更に熱弛緩処理を行ない、フィルム
厚さ95μの多孔質フィルムを得た。Extruder cylinder temperature: 170-190-190 ° C Head, die temperature: 190-190 ° C Blow ratio: 2.7 The film thus obtained is uniaxially stretched by a roll stretching machine, and then further subjected to a heat relaxation treatment. A porous film having a thickness of 95 μ was obtained.
延伸及び熱弛緩条件は下記のとおりである。 The stretching and thermal relaxation conditions are as follows.
延伸温度 70℃ 延伸倍率 2.3倍 熱弛緩温度 100℃ 熱弛緩率 13％ このようにして得られた多孔性フィルムに内側（芯）
がポリエステル、外周（鞘）がポリエチレンからなる繊
維よりなる不織布（ユニチカ（株）製エルベスS0403WD
O）をウレタン系接着剤で貼合わせた。接着剤はグラビ
アロールを用い転写法で多孔フィルムに塗布した後、圧
着ロールで多孔性フィルムと不織布を貼り合わせた。Stretching temperature 70 ° C Stretching ratio 2.3 times Thermal relaxation temperature 100 ° C Thermal relaxation rate 13% Inner (core) of the porous film thus obtained
Is a polyester, and the outer periphery (sheath) is a non-woven fabric made of polyethylene fiber (ELVES S0403WD manufactured by Unitika Ltd.)
O) was bonded with a urethane adhesive. The adhesive was applied to the porous film by a transfer method using a gravure roll, and then the porous film and the nonwoven fabric were bonded together by a pressure roll.
得られた積層体２枚を多孔性フィルム側を向き合わ
せ、ヒートバー式ヒートシーラーでヒートシールした。
ヒートシール条件は、温度180℃、圧力2.4kg/cm2、加圧
時間１秒で行なった。The two obtained laminates were faced to each other with the porous film side, and heat-sealed with a heat bar type heat sealer.
The heat sealing was performed at a temperature of 180 ° C., a pressure of 2.4 kg / cm 2 and a pressurization time of 1 second.
ヒートシール部をＴ型剥離試験機で剥離強度を測定
（剥離速度300mm/分）したところ1,700g/15mmであっ
た。When the peel strength of the heat-sealed portion was measured by a T-type peel tester (peeling speed 300 mm / min), it was 1,700 g / 15 mm.
比較例１ 実施例１で用いた多孔性フィルムのみを、実施例１と
同条件でヒートシールしたところ剥離強度は390g/15mm
であった。Comparative Example 1 When only the porous film used in Example 1 was heat-sealed under the same conditions as in Example 1, the peel strength was 390 g / 15 mm.
Met.
比較例２ 実施例１で用いた多孔性フィルムとポリエチレン繊維
とポリプロピレン繊維とが50:50の割合の混紡よりなる
不織布（ハニーファイバー（株）製グレード名323）と
の積層体同士を実施例１と同条件でヒートシールしたと
ころシール部分にエッジ切れが発生し、穴が空いて袋と
して使用できなかった。Comparative Example 2 A laminate of the porous film used in Example 1 and a nonwoven fabric (grade name 323, manufactured by Honey Fiber Co., Ltd.) composed of a blend of polyethylene fibers and polypropylene fibers in a ratio of 50:50 was prepared. When heat sealing was carried out under the same conditions as those described above, an edge was cut off at the sealing portion, and a hole was formed, making it impossible to use as a bag.
本発明の方法によれば、ヒートシール部の強度に優れ
た通気性を有する袋を容易に製造することが可能とな
り、実用上大変有用なものである。ADVANTAGE OF THE INVENTION According to the method of this invention, it becomes possible to manufacture easily the bag which is excellent in the strength of a heat seal part and has air permeability, and is very useful practically.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 9:00 22:00 (56)参考文献 特開 昭62−122752（ＪＰ，Ａ) 特開 昭59−54558（ＪＰ，Ａ) 特開 昭55−42638（ＪＰ，Ａ) 実開 平１−176041（ＪＰ，Ｕ) 実公 昭58−22733（ＪＰ，Ｙ２)──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI Technical display location B29L 9:00 22:00 (56) References JP-A-62-212752 (JP, A) JP-A JP-A-59-54558 (JP, A) JP-A-55-42638 (JP, A) JP-A-1-176041 (JP, U) JP-A-58-22733 (JP, Y2)
Claims (1)
る組成物を溶融成形して得たフィルム又はシートを延伸
処理して形成した多孔性フィルム又はシートをヒートシ
ールして袋を製造するに当り、内側（芯）がポリエステ
ル、外周（鞘）がポリエチレンからなる繊維よりなる不
織布をバックシートとして介在させてヒートシールする
ことを特徴とする通気性を有する袋の製造法。1. A method for producing a bag by heat-sealing a porous film or sheet formed by subjecting a film or sheet obtained by melt-molding a composition obtained by blending a filler to a polyolefin resin to a bag. And a heat-sealing method, wherein a non-woven fabric made of a fiber whose inner side (core) is made of polyester and whose outer side (sheath) is made of polyethylene is interposed as a back sheet and heat-sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4356088A JP2600764B2 (en) | 1988-02-26 | 1988-02-26 | Method of manufacturing air-permeable bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4356088A JP2600764B2 (en) | 1988-02-26 | 1988-02-26 | Method of manufacturing air-permeable bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01216820A JPH01216820A (en) | 1989-08-30 |
| JP2600764B2 true JP2600764B2 (en) | 1997-04-16 |
Family
ID=12667133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4356088A Expired - Fee Related JP2600764B2 (en) | 1988-02-26 | 1988-02-26 | Method of manufacturing air-permeable bag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2600764B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01176041U (en) * | 1988-05-24 | 1989-12-14 | ||
| JPH02138143U (en) * | 1989-04-18 | 1990-11-19 | ||
| JPH046047A (en) * | 1990-04-19 | 1992-01-10 | Harmo Sogo Kenkyusho:Kk | Package of dehumidifying agent |
| KR19990041083A (en) * | 1997-11-21 | 1999-06-15 | 고오사이 아끼오 | Thermoplastic bag |
| EP1375132A1 (en) * | 2001-02-23 | 2004-01-02 | Idemitsu Petrochemical Co., Ltd. | Laminate for packaging and package |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5542638A (en) * | 1978-09-20 | 1980-03-26 | Ishida Sangyo Kk | Selffheating bag |
| JPS57176217A (en) * | 1981-01-29 | 1982-10-29 | Akzo Nv | Two-component type fiber, nonwoven fabric comprising same and production thereof |
| JPS57194962A (en) * | 1981-05-18 | 1982-11-30 | Mitsubishi Gas Chemical Co | Package of deoxidizer |
| JPH069652B2 (en) * | 1985-02-08 | 1994-02-09 | 積水化学工業株式会社 | Composite sheet and dehumidifier |
| JPH0641195B2 (en) * | 1985-11-25 | 1994-06-01 | ダイニツク株式会社 | Breathable and waterproof laminate |
-
1988
- 1988-02-26 JP JP4356088A patent/JP2600764B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01216820A (en) | 1989-08-30 |
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