JP2000238161A - Absorbing laminate of disposable product and manufacture thereof - Google Patents

Absorbing laminate of disposable product and manufacture thereof

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Publication number
JP2000238161A
JP2000238161A JP11043494A JP4349499A JP2000238161A JP 2000238161 A JP2000238161 A JP 2000238161A JP 11043494 A JP11043494 A JP 11043494A JP 4349499 A JP4349499 A JP 4349499A JP 2000238161 A JP2000238161 A JP 2000238161A
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melt adhesive
absorbent
water
hot
absorbent laminate
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JP3908403B2 (en
Inventor
Masaru Fujioka
Kenji Nakaoka
健次 中岡
勝 藤岡
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Toyo Eizai Corp
トーヨー衛材株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide an absorbing laminate extremely reduced in thickness, hardly losing its shape after water absorption and capable of sufficiently developing absorbing capacity. SOLUTION: An absorbing laminate 1 contains no pulp fiber other than a nonwoven fabric and two nonwoven fabrics 10, 11 are bonded by reticulated layers 21, 22 comprising a hot-melt adhesive provided between the nonwoven fabrics and a water absorbable resin powder 31 is bonded to this hot-melt adhesive.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、使い捨てオムツや使い捨てパンツ等の使い捨て製品の吸収用積層体およびその製造方法に関し、詳細には、パルプ繊維が使用されておらず、型くずれしにくく、吸水性樹脂の散逸のない極めて薄型の吸収用積層体およびその製造方法に関するものである。 BACKGROUND OF THE INVENTION The present invention relates to a method absorbent laminate and its production of disposable products such as disposable diapers and disposable pants, in particular, no pulp fibers are used, hardly original shape, absorbent very thin absorbent laminate without dissipation of the resin and a manufacturing method thereof.

【0002】 [0002]

【従来の技術】使い捨ておむつや使い捨てパンツあるいはナプキンとして利用される体液を吸収するための吸収体としては、従来から、解繊パルプ繊維、吸水性樹脂粉末、熱可塑性繊維等をマット状に成形し、薄葉紙等で包み込んで固着した吸収マットが用いられていた。 The absorbent for absorbing body fluids which is used as the Related Art Disposable diapers and disposable pants or napkins, conventionally, molded fibrillated pulp fibers, absorbent resin powder, thermoplastic fibers such as matted , absorption mat which is fixed wrapped in tissue paper and the like have been used.

【0003】このような吸収マットは、パルプ繊維が含まれているためマットの厚みが厚い。 [0003] Such absorption mats, a thick thickness of the mat because they contain pulp fibers. 加熱圧縮して、熱可塑性繊維で拘束して薄型に形成することも試みられているが、吸水後のパルプ繊維は周囲へ広がろうとする力が強いため、結局、排尿後にはおむつ等の股下部分が外側へ膨出し、着用者に不快感を与えていた。 Heated compressed and restrained by the thermoplastic fibers has been attempted to form a thin, but because the pulp fibers after water absorption is strong force to to spread to the surroundings, eventually, the crotch of the diaper after urination portion is bulging outward, it had given the discomfort to the wearer.

【0004】一方、吸収体の吸収性能を向上させてマット全体の厚みを減らすために、吸水性樹脂粉末の量を増やす試みも行われているが、パルプ繊維1に対し吸水性樹脂粉末1(重量比)程度が限度である。 On the other hand, to improve the absorbing performance of the absorbent body to reduce the thickness of the whole mat, although attempts have been made to increase the amount of water-absorbent resin powder, the water-absorbent resin powder 1 to pulp fibers 1 ( weight ratio) degree is the limit. すなわち、これ以上吸水性樹脂粉末の量を増やすと、吸水後の膨潤によって表面近傍の吸水性樹脂が下側の吸水性樹脂に押し上げられて(パルプ繊維が吸水性樹脂の動きを拘束できない)吸収体の表面側に突出したり、吸水性樹脂が破壊する等して、着用者に不快感を与える等の不都合が起こる。 That is, increasing the amount of more water-absorbent resin powder, the water-absorbing resin near the surface is pushed up to the lower side of the water-absorbent resin by swelling (pulp fibers can not restrain the movement of the water-absorbent resin) after water absorption absorption or protruding surface side of the body, by, for example water-absorbing resin may be broken, it caused inconveniences such as discomfort to the wearer. また、パルプ繊維が少ないため保形能力が劣り、着用中のいわゆる中よれが起こる。 Further, inferior shape retention capability for the pulp fibers is small, according to occur in a so-called in wear.

【0005】 [0005]

【発明が解決しようとする課題】そこで本発明では、超薄型で、吸水後に型くずれを起こさず、しかも吸収能力を充分発揮し得る形態の吸収用積層体およびその製造方法の提供を課題として掲げた。 In [0006] The present invention, ultra-thin, raised without causing Original shape after water absorption, moreover absorbent laminate form which can sufficiently exhibit the absorption capacity and to provide a manufacturing method as a problem It was.

【0006】 [0006]

【課題を解決するための手段】上記課題を解決した本発明の使い捨て製品の吸収用積層体は、不織布状以外のパルプ繊維を含まない吸収用積層体であって、2枚の不織布が不織布間に設けられたホットメルト接着剤からなる網状体層によって接着されていると共に、このホットメルト接着剤に吸水性樹脂粉末が付着してなるところに要旨を有する。 Means for Solving the Problems] absorbent laminate of the disposable product of the present invention which solves the aforementioned problems is a absorbent laminate containing no pulp fibers other than nonwoven fabric, between two non-woven fabrics are nonwoven together are bonded by reticular layer consisting of the hot-melt adhesive provided, it has the gist where the water-absorbent resin powder in the hot melt adhesive is adhered.

【0007】この構成の採用によって、パルプ繊維を含まない超薄型の吸収用積層体を提供することができた。 [0007] By adopting this configuration, it is possible to provide an absorbent laminate of the ultra-thin without the pulp fibers.
また、吸水性樹脂粉末は、ホットメルト接着剤の網状体に粉末の一部が付着した状態で保持されるので、網状体の空隙に捕捉された状態で存在することとなり、不織布の間に確実に保持されると共に、接着剤によって吸水性能が阻害されることがない。 Further, the water-absorbent resin powder, since it is held in a state in which a part of the powder meshwork of the hot melt adhesive is attached, will be present in a state trapped in a void of the mesh body, securely between the nonwoven fabric is held in, never water absorbency is inhibited by the adhesive.

【0008】吸収用積層体の2枚の不織布同士が部分的に溶着されている構成は、本発明の好ましい実施態様であり、吸収用積層体の形状安定性が一層向上する。 [0008] The structures two non-woven fabrics between the absorbent laminate is partially fused are preferred embodiments of the present invention, the shape stability of the absorbent laminate is further improved.

【0009】本発明の吸収用積層体を製造する方法は、 [0009] The method for producing the absorbent laminate of the present invention,
走行している帯状不織布表面へ向けて、溶融状態のホットメルト接着剤を複数のノズルから糸状に吐出することにより、帯状不織布表面にホットメルト接着剤の網状体を形成し、次いで、この網状体の上へ吸水性樹脂粉末を散布し、再び、溶融状態のホットメルト接着剤を複数のノズルから糸状に吐出してホットメルト接着剤の網状体を形成し、その上に別体の帯状不織布を載置して連続積層体を形成し、所定の大きさに切断するところに要旨を有する。 Toward the running to that strip nonwoven surface, by discharging the thread of hot melt adhesive in a molten state from a plurality of nozzles to form a mesh body of hot melt adhesive strip nonwoven surface, then this mesh body the water-absorbent resin powder spraying onto, again by ejecting hot melt adhesive in a molten state from a plurality of nozzles in a filamentous form a mesh body of hot-melt adhesive, a strip nonwoven separate thereon placed to form a continuous laminate has the gist where the cutting into a predetermined size. この製造方法の採用によって、本発明の吸収用積層体が簡単に製造できる。 The adoption of this manufacturing method, absorbent laminate of the present invention can be easily manufactured.

【0010】請求項2に記載の吸収用積層体を製造する場合には、所定の大きさに切断する前または同時にあるいは後に吸収用積層体の2枚の不織布同士を部分的に溶着する工程を加える。 [0010] When manufacturing the absorbent laminate according to claim 2, the step of partially welding two sheets of nonwoven fabric between the absorbent laminate before or at the same time or after cutting into a predetermined size add.

【0011】 [0011]

【発明の実施の形態】図1は、本発明の吸収用積層体の代表的な実施例を、拡大してモデル的に示した断面説明図である。 Figure 1 DETAILED DESCRIPTION OF THE INVENTION A representative embodiment of the absorbent laminate of the present invention, is a cross-sectional view showing a model manner to expand. この吸収用積層体1は、2枚の不織布10、 The absorbent laminate 1 has two non-woven fabrics 10,
11の間に、ホットメルト接着剤の網状体層2と吸水性樹脂粉末31、31…が挟まれて形成されている。 11 during the hot-melt adhesive mesh layer of adhesive 2 and the water-absorbent resin powder 31, 31 are formed is sandwiched. 2枚の不織布10、11は、ホットメルト接着剤の網状体層2によって接着されており、吸水性樹脂粉末3は、網状体を構成しているホットメルト接着剤に付着した状態で存在している。 Two non-woven fabrics 10, 11 are bonded by the reticular layer 2 of a hot melt adhesive, water-absorbent resin powder 3 is present in a state of adhering to the hot-melt adhesive constituting the reticulated body there. このため、吸水性樹脂粉末31は、粉末の表面全体が接着剤に覆われた状態ではなく、一部分が接着剤の網に付着しているだけとなる。 Therefore, water-absorbent resin powder 31 is not a state where the entire surface of the powder was covered with an adhesive, the only partially attached to the network of the adhesive. 従って、吸水性能が阻害されることがなく、図2に示したように、粉末31が吸水によって膨潤して大粒径となっても(符号3 Therefore, without water absorption performance is inhibited, as shown in FIG. 2, the powder 31 is swollen by water absorption even if a large particle size (reference numeral 3
2)、網状体には空隙があるので、充分に吸水性能を発揮することができる。 2) Since the mesh body has voids, it can be exhibited sufficiently water absorbency. さらに、ホットメルト接着剤として優れた延性を有する種類のものを用いると、吸水性樹脂の膨大化に追随して網目を大きくするように延びることができるため、より好ましい。 Furthermore, the use of a type having excellent ductility as hot melt adhesive, it is possible to extend so as to increase the mesh to follow the thickened water-absorbent resin, more preferable. なお、これらの図はモデル的に描かれているので、不織布の厚み、網状体層の厚み、吸水性樹脂粉末の大きさの相対関係が、この図例のようになっていることを示すものではない。 Since these figures are drawn to model, the one indicating that the non-woven fabric of thickness, the thickness of the reticular layer, the relative relationship between the size of the water-absorbent resin powder, so that in this illustrated example is not.

【0012】図例では、網状体層2は、上層21と下層22とから構成されているが、これは後述する製造方法を採用した場合に、厚み方向の中央付近に吸水性樹脂粉末が存在する2層構造となるのである。 [0012] In the illustrated example, the mesh layer 2 is configured from an upper layer 21 bottom layer 22. This is the case of adopting the manufacturing method described below, there are water-absorbent resin powder in the vicinity of the center in the thickness direction it become a two-layer structure in which. この構成は、吸水性樹脂粉末が吸水後に膨潤しても、その影響が不織布に及ばないため、好ましい。 This configuration, since the water-absorbent resin powder is also swells after water absorption, its effects do not span the nonwoven, preferred. 3層以上であればより好ましい。 More preferably equal to three or more layers. ただし、あまり不織布の間のホットメルト層が増えると、吸収用積層体の剛性が増す可能性があるため、 However, there is a possibility to increase hot when melt layer is increased, the stiffness of the absorbent laminate between much of the nonwoven fabric,
吸収用積層体自体を積層する構成を採用することが好ましい。 It is preferable to employ a configuration of laminating a absorbent laminate itself. 1層のみ、すなわちホットメルト接着剤の網状体層を形成した後に吸水性樹脂粉末を散布して、上側の不織布を重ねる構成は、吸水性樹脂粉末と上側の不織布が接触することがあり、吸水後の膨潤ポリマーが突出し、 Only one layer, i.e. by spraying a water-absorbent resin powder after the formation of the reticular layer of hot-melt adhesives, construction overlaying upper nonwoven may water-absorbent resin powder and the upper non-woven fabric is in contact, water protruding swelling polymer of the later,
吸収用積層体表面に凹凸が形成される可能性がある上、 On that may unevenness is formed on the absorbent laminate surface,
不織布の接着力が弱くなることがあるため好ましくない。 Which is not preferable that the adhesive strength of the nonwoven fabric is weakened. また、吸水性樹脂が脱落する可能性もあるため、網状体層を2層以上とすることが推奨される。 Further, since the water-absorbing resin is a possibility of falling off, it is recommended to the reticular layer of two or more layers.

【0013】不織布10、11としては、ポリプロピレン等のポリオレフィン繊維、レーヨン繊維、その他の合成繊維製の不織布や、絹、パルプ(セルロース)繊維等が混合されて製造された不織布等が用いられる。 [0013] As the nonwoven fabric 10 and 11, polyolefin fibers such as polypropylene, rayon fibers, and other synthetic fiber nonwoven fabric, silk, pulp (cellulose) nonwoven fabric in which fibers are produced by mixing are used. 本発明の吸収用積層体には、不織布状以外のパルプ繊維は含まれないので、クッション性を付与するために、比較的嵩高い不織布が好ましい。 The absorbent laminate of the present invention, since the pulp fibers other than non-woven fabric is not included, in order to impart cushioning properties, relatively bulky nonwoven fabric is preferred. 不織布10または11として、 As the nonwoven fabric 10 or 11,
2層以上に積層した不織布を用いることもクッション性付与の点から好ましい。 It is also preferable from the viewpoint of cushioning properties imparted using a nonwoven fabric laminated to two or more layers. なお、吸収用積層体の厚みを増大させない程度のわずかな量のパルプ繊維が含まれていても、本発明に包含されるものとする。 Incidentally, also contain a small amount of pulp fibers so as not to increase the thickness of the absorbent laminate, it is intended to be encompassed by the present invention.

【0014】ホットメルト用接着剤としては、60〜1 [0014] as a hot-melt adhesive is, 60-1
80℃程度で溶融し、糸状に吐出されてから冷却する間に、網状体を形成し得るものであれば特に限定されない。 And melted at about 80 ° C., during the cooling from being discharged to the thread is not particularly limited as long as it can form a mesh body. 網状体とは、ホットメルト接着剤が繊維状になっていて、繊維同士が部分的に融着してウエブ状になっているような状態を指す。 The mesh-like body, and a hot-melt adhesive has become fibrous, refers to conditions such as fibers is in the web-like partially fused. スパイラル状に吐出されて網状体を形成しているものであってもよい。 Is discharged spirally may be one that forms a mesh body. 網状体とすることで、吸水性樹脂粉末が吸水後に膨潤しても保持可能な空隙が、多数形成されることとなる。 With meshwork, the water-absorbing resin powder swollen which can also be held in voids after water comes to be formed in a large number. また、樹脂粉末が膨潤して大粒径となっても、膨潤後の粒子の周囲が全て接着剤であるので接着剤の網から脱落することはない。 Further, even if a large particle size resin powder swells and does not fall off from the web of adhesive because the surrounding particles after swelling are all adhesives.

【0015】ホットメルト接着剤の具体例としては、天然ゴム系、ブチルゴム系、ポリイソプレン等のゴム系、 [0015] Examples of hot melt adhesives, natural rubber, butyl rubber, polyisoprene rubber type,
SIS、SBS、SIBS、SEBS等のスチレン系エラストマー、エチレン・酢酸ビニルコポリマー(EV SIS, SBS, SIBS, styrene-based elastomer and SEBS, ethylene-vinyl acetate copolymer (EV
A)、ポリエステル、アクリル系、ポリオレフィン系等が挙げられる。 A), polyester, acrylic, polyolefin, and the like. 吸水後の膨潤粒子の脱落を防ぐには接着力の強いものが好ましく、また粒子の膨大化に追従して網目を大きくすることのできる優れた延性を持つことが好ましい。 Preferably has strong adhesive force to prevent accidental removal of the swollen particles after water absorption, also preferably has excellent ductility can be increased mesh following the thickened particles. これらの点で、ゴム系やスチレン系エラストマーの利用が推奨される。 In these respects, the use of rubber-based and styrene-based elastomer is recommended.

【0016】ホットメルト接着剤を網状体に形成するには、複数のノズルから溶融状態の接着剤を糸状に吐出する方法(カーテンスプレー法、スパイラルコーティング法等)が、簡便で好ましい。 [0016] The hot melt adhesive forming the mesh body, a method of discharging the adhesive in a molten state to thread a plurality of nozzles (curtain spray method, a spiral coating method) is preferably simple. 糸状の接着剤が不織布の上に積層されて固化する際には、網状体となる。 When the adhesive filamentous solidifies stacked on the nonwoven fabric, a mesh body. このとき、吐出してくる接着剤にエアーを吹き付けることにより、接着剤を間欠的に吐出しなくても、接着剤の自重で自然に適当な長さに切断することができる。 In this case, by blowing air into the adhesive come discharged, without intermittently discharge of the adhesive can be cut to naturally suitable length by the weight of the adhesive. またエアーの向きを適宜設定すれば、広範囲な領域に網状体を形成することができる。 Further, if appropriately setting the air direction, it is possible to form the mesh body to a wide range of areas.

【0017】吸水性樹脂粉末としては、公知の吸水性樹脂が使用でき、ポリアクリル酸塩系、セルロース系、澱粉・アクリロニトリル系等の吸水性樹脂が挙げられる。 [0017] As the water-absorbent resin powder is available known water-absorbent resins, polyacrylic acid salt-based, cellulose-based, and a water-absorbent resin of starch-acrylonitrile and the like.
吸水倍率は高い方が好ましい。 The water absorption ratio is preferably higher. 本発明の吸収用積層体の吸収能力は、吸水性樹脂のみが発揮しているからである。 Absorption capacity of the absorbent laminate of the present invention, since only the water-absorbing resin is exerting. 吸水性樹脂粉末は、粉末存在部分と非存在部分に分かれていてもよく、吸収用積層体の中央付近のみ散布する、前側に重点的に散布する、あるいは、筋状に散布する等、用途、着用者の性別等に応じて、適宜散布パターンを変更することが可能である。 Water-absorbent resin powder may be divided into a powder present portion and the non-occupied part are sprayed only near the center of the absorbent laminate, intensively sprayed on the front side, or the like is sprayed streaked, applications, depending on the wearer's sex, etc., it is possible to change as appropriate spray pattern. もちろん、吸収用積層体の全面に散布されていてもよい。 Of course, it may be sprayed on the entire surface of the absorbent laminate. 吸水性樹脂粉末を間欠的に散布する構成を採用する場合には、ホットメルト接着剤の塗布部位を吸水性樹脂粉末の散布パターンに合致させることもできる。 When employing the intermittently sprayed constituting the water-absorbent resin powder can also be matched to the application site of a hot melt adhesive spray pattern of the water-absorbent resin powder.

【0018】吸収用積層体は、その周囲がヒートシールや超音波溶着で封止されていることが好ましい。 The absorbent laminate is preferably around is sealed by heat sealing or ultrasonic welding. ホットメルト接着剤層から脱落した吸水性樹脂粉末がある場合に、吸収用積層体の周囲からこぼれ落ちるのを防ぐためである。 If there is a water-absorbent resin powder falling off from the hot-melt adhesive layer, in order to prevent falling off from the surrounding absorbent laminate. ただし、吸水性樹脂粉末が吸収用積層体の中央付近のみに散布されている場合等は、周囲の封止がなくても構わない。 However, like the case where the water-absorbent resin powder is sprayed only near the center of the absorbent laminate is may be no sealing of the surrounding. さらに、使い捨てパンツ・使い捨ておむつ、生理用ショーツ等の他の製品に組み込んで使用する場合には、組み込む際の固着作業で吸収用積層体の周囲が封止されることもあるので、この場合にも吸収用積層体として周囲が封止されていなくてもよい。 Furthermore, the disposable pants disposable diaper, when used incorporated into other products such as sanitary panties, because the surrounding absorbent laminate in securing work when incorporating also be sealed, in this case also it may not be the surrounding is sealed as absorbent laminate.

【0019】吸収用積層体は、部分的に2枚の不織布同士が溶着されていることが好ましい。 The absorbent laminate is preferably partially two non-woven fabrics each other are welded. 吸水が局部的な場合に、吸収用積層体の一部分のみが膨潤して重量が増大すると、型くずれを起こしやすいが、ヒートシールや超音波溶着等によって、部分的に溶着しておくと、型くずれを起こしにくくなる。 If the water absorption is localized, if only a portion of the absorbent laminate is the weight swell is increased, prone to original shape but, by heat sealing or ultrasonic welding or the like, the previously partially welded, the original shape less likely to cause. 前記したように、吸水性樹脂粉末を間欠的に散布して、粉末存在部分と非存在部分に分ける場合には、粉末非存在部分をヒートシールする方が好ましい。 As described above, the water-absorbent resin powder is intermittently sprayed, when divided into powder present portion and the non-occupied part is better to heat seal the powder absence moiety are preferred. 粉末存在部分はシール強度が低くなりがちだからである。 Powder exists portion seal strength is because often lower on.

【0020】図3に、溶着されている吸収用積層体の断面図を示した。 [0020] Figure 3 shows a cross-sectional view of the absorbent laminate being welded. 不織布同士10、11が溶着部4で溶着されて、ホットメルト接着剤の網状体層2および吸水性樹脂31が区画された状態となっている。 Nonwoven between 10 and 11 are welded by the welded portion 4, the mesh-like body layer 2 and the water-absorbing resin 31 of the hot melt adhesive is in the state of being partitioned. これは、図4 This is, as shown in FIG. 4
の(a)のA−A線断面図であり、ストライプ状に溶着した例を示している。 An A-A line cross-sectional view of (a) of which shows an example of welding in stripes. 溶着形状は、特に限定されず、図4の(b)に示すような斜め格子状、(c)に示すような円形ドット状等、適宜変更可能である。 Welding shape is not particularly limited, to show such an oblique grid pattern (b) in FIG. 4, a circular dot shape, or the like, such as shown in (c), can be changed as appropriate. 溶着は、図4 Welding, as shown in FIG. 4
に示した形状の歯形を持つ加熱板あるいはローラーを用いて行えばよい。 It may be performed by using a heating plate or roller with a tooth of the shape shown in.

【0021】次に、本発明の吸収用積層体を製造する方法について説明する。 [0021] Next, a method for producing the absorbent laminate of the present invention. 図5には、本発明の吸収用積層体を連続的に製造する好ましい方法の説明図を示した。 FIG. 5 shows an illustration of a preferred method of preparing the absorbent laminate of the present invention continuously. まず、白抜き矢印方向へ走行している帯状不織布12の表面へ向けて、溶融状態のホットメルト接着剤を複数のノズルを有するコーター51から糸状に吐出する。 First, toward the surface of the strip nonwoven 12 that travels in the white arrow direction, discharged from the coater 51 for filamentous having a hot melt adhesive to a plurality of nozzles in a molten state. このコーター51は、帯状不織布12の幅と同程度の長さを有しており、長手方向に複数のノズルを備えているものが使用できる。 The coater 51 has a length comparable to the width of the strip-shaped nonwoven fabric 12, those provided with a plurality of nozzles in the longitudinal direction can be used. エアー噴出口がコーター51と同体または別体に設けられていてもよい。 Air injection ports may be provided in the coater 51 and homologs or separately. またコーター51に代えて、複数のノズルとエアー噴出口とが設けられた円形ノズルを、ホットメルト接着剤が面状に塗工されるように複数個設置することもできる。 Also in place of the coater 51, a circular nozzle provided with a plurality of nozzles and the air spout, the hot melt adhesive may be a plurality placed so as to be coated on the surface. 糸状に吐出されたホットメルト接着剤は、帯状不織布12の上に落下して、網状体層22を形成する。 Hot melt adhesive discharged in thread is to fall on a belt-like nonwoven fabric 12, form a network layer 22.

【0022】続いて、散布装置52によって、帯状不織布13の上のホットメルト接着剤の網状体層22の上へ吸水性樹脂粉末31を散布する。 [0022] Subsequently, by sparging device 52, to spray the water-absorbent resin powder 31 onto the mesh layer 22 of hot melt adhesive on the strip nonwoven 13. ホットメルト接着剤が完全に固化する前に粉末31が散布されることが好ましく、これにより、粉末31が網状体層22に強固に接着する。 It is preferred that the powder 31 is sprayed before the hot-melt adhesive is fully solidified, thereby, the powder 31 is firmly adhered to the mesh layer 22.

【0023】次に、再び網状体層22を形成する工程と同様にして、溶融状態のホットメルト接着剤を粉末31 Next, in the same manner as the step of forming a network layer 22 again, the powder 31 of hot melt adhesive in a molten state
が散布された上に吐出して、網状体層21を形成する。 There is ejected onto which is sprayed to form a net-like layer 21.
そして、その上に別体の帯状不織布13を載置してローラ54、54で圧着することにより連続積層体15が得られる。 Then, the continuous laminate 15 obtained by crimped by placing the roller 54 the strip-shaped nonwoven fabric 13 separate thereon.

【0024】図示しない切断装置によって、連続積層体15を所定の大きさに切断すれば、吸収用積層体が製造される。 [0024] by an unillustrated cutting device, if cutting a continuous laminate 15 into a predetermined size, absorbent laminate is manufactured. 溶着工程を加える場合には、切断工程の前または同時にあるいは後に(あるいはこれらの組合せでもよい)、積層体の2枚の不織布同士を部分的に溶着する。 When adding the welding process, (which may or a combination of these) prior to or simultaneously or after the cutting process, partially welding the two non-woven fabrics between the laminate.
溶着は、図4に示した形状の歯形を持つ加熱板あるいはローラーで吸収用積層体を挟むなどして行うことができる。 Welding can be performed by, for example, to sandwich the absorbent laminate in a heated plate or roller with a tooth of the shape shown in FIG.

【0025】 [0025]

【発明の効果】本発明は以上のように構成されているので、超薄型であっても吸水性能に優れ、しかも型くずれの少ない吸収用積層体を提供することができた。 Since the present invention is constructed as described above, excellent even water absorbency an ultra-thin, yet it is possible to provide a less absorbent laminate of original shape. 従って、使い捨てパンツ、使い捨ておむつ、尿取り補助パッド、生理用ショーツ、軽失禁用ショーツ等の吸収体として製品に組み込んで使用したり、そのまま生理用ナプキンやペットシートとして使用することにより、薄くて外観に優れ、漏れ等の不都合のない衛生材料を提供することができるようになった。 Therefore, disposable pants, disposable diapers, incontinence auxiliary pad, sanitary shorts, or use incorporated into the product as an absorber such as light incontinence shorts, as it is by the use as a sanitary napkin or a pet sheet, thin appearance excellent, it has become possible to provide a free sanitary material inconveniences such as leakage. また、本発明の吸収用積層体の製造方法は、極めて簡便なので、吸収用積層体を安価に提供することができる。 The manufacturing method of absorbent laminate of the present invention can provide extremely so simple, the absorbent laminate inexpensively. なお、本発明の吸収用積層体は、衛生材料分野以外にも、農業用保水・吸水材、コンクリート養生マット、結露防止シート、湿布剤、貼付剤、化粧剤等に使用することができる。 Incidentally, absorbent laminate of the present invention, in addition to sanitary materials field, agricultural water retaining-water absorbent material, concrete curing mats, condensation preventing sheets, poultices, patches, can be used in cosmetic agents.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の代表的な実施例を示す断面模式図である。 1 is a schematic sectional view showing an exemplary embodiment of the present invention.

【図2】吸水後の吸収用積層体の断面模式図である。 2 is a schematic cross-sectional view of absorbent laminate after water absorption.

【図3】溶着された吸収用積層体の断面模式図である。 3 is a cross-sectional schematic view of a welded absorbent laminate.

【図4】(a)、(b)、(c)は、溶着パターン例を示す説明図である。 [4] (a), (b), (c) is an explanatory view showing a welding pattern example.

【図5】本発明法の代表的な実施例を示す概略説明図である。 5 is a schematic diagram illustrating an exemplary embodiment of the present invention method.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 吸収用積層体 10、11 不織布 12、13 帯状不織布 21、22 ホットメルト接着剤の網状体層 31 吸水性樹脂粉末 4 溶着部 1 mesh layer 31 water-absorbent resin powder 4 welded portion of the absorbent laminate 10, 11 nonwoven 12,13 strip nonwoven 21 hot-melt adhesive

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 3B029 BA02 BA04 BA12 BA14 BA15 BA18 BB06 BD16 BD17 4C003 AA26 AA28 GA02 4F100 AJ04A AJ04B AJ07 AK01C AK03 AK07 AK25 AK27 BA03 BA06 BA10A BA10B BA33 DE01C DG02A DG02B DG15A DG15B EC03 EC032 EJ25 EJ252 GB72 JD15 JD15C JL04 ────────────────────────────────────────────────── ─── front page of continued F-term (reference) 3B029 BA02 BA04 BA12 BA14 BA15 BA18 BB06 BD16 BD17 4C003 AA26 AA28 GA02 4F100 AJ04A AJ04B AJ07 AK01C AK03 AK07 AK25 AK27 BA03 BA06 BA10A BA10B BA33 DE01C DG02A DG02B DG15A DG15B EC03 EC032 EJ25 EJ252 GB72 JD15 JD15C JL04

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 不織布状以外のパルプ繊維を含まない吸収用積層体であって、2枚の不織布が不織布間に設けられたホットメルト接着剤からなる網状体層によって接着されていると共に、このホットメルト接着剤に吸水性樹脂粉末が付着してなることを特徴とする使い捨て製品の吸収用積層体。 1. A absorbent laminate containing no pulp fibers other than nonwoven fabric, with are bonded by meshwork layer two non-woven fabrics are composed of hot-melt adhesive disposed between the nonwoven fabric, the absorbent laminate of disposable products, wherein the water-absorbent resin powder in the hot melt adhesive is adhered.
  2. 【請求項2】 吸収用積層体の2枚の不織布同士が、部分的に溶着されている請求項1に記載の吸収用積層体。 Wherein two non-woven fabrics between the absorbent laminate is the absorbent laminate body according to claim 1, which is partially welded.
  3. 【請求項3】 請求項1に記載の吸収用積層体を製造する方法であって、走行している帯状不織布表面へ向けて、溶融状態のホットメルト接着剤を複数のノズルから糸状に吐出することにより、帯状不織布表面にホットメルト接着剤の網状体を形成し、次いで、この網状体の上へ吸水性樹脂粉末を散布し、再び、溶融状態のホットメルト接着剤を複数のノズルから糸状に吐出してホットメルト接着剤の網状体を形成し、その上に別体の帯状不織布を載置して連続積層体を形成し、所定の大きさに切断することを特徴とする吸収用積層体の製造方法。 3. A method of making an absorbent laminate body according to claim 1, toward the strip surface of the nonwoven fabric which is traveling, discharges filamentous hot melt adhesive in a molten state from a plurality of nozzles by, on the strip surface of the nonwoven fabric to form a network of hot-melt adhesive, then spraying a water-absorbent resin powder onto the mesh body, again, the thread of hot melt adhesive in a molten state from a plurality of nozzles discharge to form a mesh body of hot-melt adhesive, the continuous laminate formed by placing a separate band-shaped nonwoven fabric thereon, absorbent laminate, characterized in that cut into a predetermined size the method of production.
  4. 【請求項4】 所定の大きさに切断する前または同時にあるいは後に、吸収用積層体の2枚の不織布同士を部分的に溶着する工程を含むものである請求項3に記載の製造方法。 Wherein before or after or simultaneously cut into a predetermined size, the method according to claim 3 of two sheets of non-woven fabric between those comprising the step of partially welding of absorbent laminate.
JP04349499A 1999-02-22 1999-02-22 Absorbent laminate of disposable products Expired - Lifetime JP3908403B2 (en)

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