JP5057708B2 - Absorbent manufacturing method and manufacturing apparatus - Google Patents

Absorbent manufacturing method and manufacturing apparatus Download PDF

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JP5057708B2
JP5057708B2 JP2006172036A JP2006172036A JP5057708B2 JP 5057708 B2 JP5057708 B2 JP 5057708B2 JP 2006172036 A JP2006172036 A JP 2006172036A JP 2006172036 A JP2006172036 A JP 2006172036A JP 5057708 B2 JP5057708 B2 JP 5057708B2
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sheet
mold
open
cell foam
foam
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JP2008000967A (en
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正洋 谷口
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Kao Corp
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Description

本発明は、吸収性物品に使用される吸収体、特に、吸液性の連続気泡発泡体を具備する吸収体の製造方法及び装置に関する。   The present invention relates to an absorber used for an absorbent article, and more particularly to a method and an apparatus for manufacturing an absorber comprising a liquid-absorbing open-cell foam.

液吸収性の連続気泡発泡体を利用した吸収性物品の製造に関する技術として、下記特許文献１に記載の技術が提案されている。この技術は、液吸収性の連続気泡発泡体を押出成形によって連続的に成形するものである。   As a technique relating to the manufacture of an absorbent article using a liquid-absorbing open-cell foam, a technique described in Patent Document 1 below has been proposed. In this technique, a liquid-absorbing open-cell foam is continuously formed by extrusion.

特表２００３−５３０１４９号公報Special table 2003-530149 gazette

幅が一定である形態の吸収体を製造する場合には、特許文献１に記載のような押出成形による製造方法も好ましいが、股下にフィットするように、長さ方向中央部がくびれた形態や周辺部に比べて中央部が盛り上がった中高の形態とする場合には、押出成形では製造することができない。   When manufacturing an absorbent body having a constant width, a manufacturing method by extrusion molding as described in Patent Document 1 is also preferable, but a shape in which the central portion in the length direction is constricted to fit the crotch or In the case of a middle-high form in which the central part is raised compared to the peripheral part, it cannot be produced by extrusion molding.

従って本発明は、所望の形態の連続気泡発泡体を具備する吸収体を好適に製造することができる吸収体の製造方法及び装置を提供することを目的とする。   Therefore, an object of this invention is to provide the manufacturing method and apparatus of an absorber which can manufacture suitably the absorber which comprises the open-cell foam of a desired form.

本発明は、吸液性の連続気泡発泡体を具備する吸収体の製造方法であって、回転体の周部に配置された成形型内に前記連続気泡発泡体の原料を供給し、前記回転体を回転させながら前記成形型内で前記原料を発泡させて前記連続気泡発泡体を成形する吸収体の製造方法を提供することにより、前記目的を達成したものである。   The present invention is a method for manufacturing an absorbent body comprising a liquid-absorbing open-cell foam, wherein the raw material of the open-cell foam is supplied into a mold placed on the periphery of the rotary body, and the rotation The object is achieved by providing a method for producing an absorbent body in which the open cell foam is molded by foaming the raw material in the mold while rotating the body.

また、本発明は、吸液性の連続気泡発泡体を具備する吸収体の製造装置であって、凹部を有する成形型が周部に配置され回転可能に設けられた回転体と、前記成形型に前記連続気泡発泡体の原料を供給する原料供給手段とを備えている吸収体の製造装置を提供することにより、前記目的を達成したものである。   The present invention also relates to an apparatus for manufacturing an absorbent body having a liquid-absorbing open-cell foam, a rotating body provided with a molding die having a recess disposed in a peripheral portion thereof, and the molding die. The object is achieved by providing a manufacturing apparatus for an absorbent body provided with a raw material supply means for supplying a raw material for the open-cell foam.

本発明の吸収体の製造方法及び装置によれば、所望の形態の連続気泡発泡体を具備する吸収体を好適に製造することができる。本発明における連続気泡発泡体とは、内部の気泡が繋がっている発泡体をいい、吸収体として使用された場合に吸収性能が発現されるものをいう。   According to the method and apparatus for producing an absorbent body of the present invention, an absorbent body having a desired form of open-cell foam can be suitably produced. The open-cell foam in the present invention refers to a foam in which internal bubbles are connected, and refers to a material that exhibits absorption performance when used as an absorber.

以下、本発明をその好ましい実施形態に基づき、図面を参照しながら説明する。
図１は本発明の吸収体の製造装置（以下、単に製造装置ともいう。）の一実施形態を模式的に示したものである。 Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
FIG. 1 schematically shows an embodiment of an absorbent body manufacturing apparatus (hereinafter also simply referred to as a manufacturing apparatus) according to the present invention.

図１に示すように、本実施形態の製造装置１は、凹部２１を有する成形型２が周部に複数配置され回転可能に設けられた回転体３と、成形型２に吸液性の連続気泡発泡体の原料を供給する原料供給手段４と、第１シート１１を供給する第１シート供給手段５と、連続気泡発泡体１の成形面を形成するように第１シート１１を支持する支持手段６と、成形型２の内面に第２シート１２を供給する第２シート供給手段７と、後述する成形型２の流通路２３を通して前記第２シート１２を前記内面に吸着させる吸引手段８と、成形型２から脱型された吸収体１０を搬送する搬送手段９とを備えている。   As shown in FIG. 1, the manufacturing apparatus 1 of the present embodiment includes a rotating body 3 in which a plurality of molds 2 each having a recess 21 are arranged in a circumferential portion and provided rotatably, and the mold 2 has a continuous liquid-absorbing property. The raw material supply means 4 for supplying the raw material of the cellular foam, the first sheet supply means 5 for supplying the first sheet 11, and the support for supporting the first sheet 11 so as to form the molding surface of the open-cell foam 1. Means 6; second sheet supply means 7 for supplying the second sheet 12 to the inner surface of the mold 2; and suction means 8 for adsorbing the second sheet 12 to the inner surface through a flow passage 23 of the mold 2 to be described later. And a conveying means 9 for conveying the absorbent body 10 removed from the mold 2.

成形型２の凹部２１は、成形する連続気泡発泡体の形状に対応した成形面２２を有している。本実施形態では、図２に示すように、成型面２２は、長さ方向中央部が括れ且つ吸収体の中央部が周辺部に比べて中高の形態の連続気泡発泡体が成形されるように設けられている。成形型２には、成形面２２において開口する流通路２３が設けられている。   The recess 21 of the mold 2 has a molding surface 22 corresponding to the shape of the open-cell foam to be molded. In the present embodiment, as shown in FIG. 2, the molding surface 22 is formed such that an open-cell foam having a shape in which the central portion in the length direction is constricted and the central portion of the absorber is higher than the peripheral portion is formed. Is provided. The molding die 2 is provided with a flow passage 23 that opens at the molding surface 22.

回転体３は、複数の成形型２を周部に設置可能な回転ドラム３１と、回転ドラム３１を回転駆動させる駆動源（図示せず）とを備えている。回転ドラム３１は、成形型２を固定するフレーム部分のみが回転し、中心部分は回転しない二重構造となっており、中心部分には後述の吸引手段８の吸引ポンプに連通する流通路３２と前記吸引ポンプの吸引力を所定の角度範囲に定める隔壁３３が設けられている。   The rotating body 3 includes a rotating drum 31 in which a plurality of molds 2 can be installed on the periphery, and a drive source (not shown) that drives the rotating drum 31 to rotate. The rotating drum 31 has a double structure in which only the frame portion for fixing the molding die 2 rotates and the central portion does not rotate. The central portion has a flow passage 32 communicating with a suction pump of the suction means 8 described later. A partition wall 33 is provided for determining the suction force of the suction pump within a predetermined angle range.

原料供給手段４は、発泡体の構成成分を貯留するタンク４１、４２と、吸収性ポリマーを貯留するタンク４３と、発泡体の構成成分及び吸水性ポリマーを混合して原料とする混合機４４と、混合機４４から成形型２に原料を注入するノズル４５とを備えている。   The raw material supply means 4 includes tanks 41 and 42 for storing foam constituents, a tank 43 for storing absorbent polymers, and a mixer 44 that mixes foam constituents and water-absorbing polymers into raw materials. And a nozzle 45 for injecting the raw material from the mixer 44 into the mold 2.

発泡体の構成成分は、スケルトン構造の主体となる熱可塑性ポリマーに、発泡のためのガス発泡剤、発泡後の発泡体表面を親水性とするための界面活性剤からなり、さらに場合によっては繊維材料を原料として用いることができる。   The components of the foam consist of a thermoplastic polymer, which is the main component of the skeleton structure, a gas foaming agent for foaming, and a surfactant to make the foam surface after foaming hydrophilic, and in some cases fibers. The material can be used as a raw material.

第１シート供給手段５は、第１シート１１をその原反から繰り出す繰り出し装置５１を備えている。   The first sheet supply means 5 includes a feeding device 51 that feeds the first sheet 11 from the original fabric.

第１シートの支持手段６は、成形型２の表面の周回軌道に沿うように配置されたローラー６１を含むローラー群と、該ローラー群に巻回されたベルト６２と、該ローラー群を駆動させるモーター（図示せず）とを備えている。   The first sheet support means 6 drives a roller group including a roller 61 arranged along the circular orbit of the surface of the mold 2, a belt 62 wound around the roller group, and the roller group. And a motor (not shown).

第２シート供給手段７は、第２シート１２をその原反から繰り出す繰り出し装置７１と、繰り出し装置７１から繰り出された第２シート１２を所定の軌道で搬送するためのローラー７２とを備えている。   The second sheet supply means 7 includes a feeding device 71 that feeds the second sheet 12 from the original fabric, and a roller 72 for feeding the second sheet 12 fed from the feeding device 71 in a predetermined path. .

吸引手段８は、成形型２の流通路２３及び流通路３３を通して成形型２の成形面２２に第２シート１２を吸着させる吸引ポンプ（図示せず）を備えている。   The suction means 8 includes a suction pump (not shown) that adsorbs the second sheet 12 to the molding surface 22 of the molding die 2 through the flow passage 23 and the flow passage 33 of the molding die 2.

搬送手段９は、吸引ボックス９１が内装されたベルトコンベアー９２で構成されており、成形が完了した吸収体１０に吸引ボックス９１の吸引力を作用させ、吸収体１０を成形型２から脱型させて搬送する。脱型を安定させるために回転ドラム３１の内側から流通路２３にエアーを送ってもよい。
また、図１では、吸収体１０は吸引力によってベルトコンベアー９２に仮固定された状態であり、第１シート１１側が平面となっているが、吸引状態が解除された状態では、回転ドラム３１の外周面の形状に近い湾曲した形状であり、吸収性物品に用いられた場合、身体の前後方向（腹側−背側方向）の湾曲形状に沿いやすくなる。 The conveying means 9 is constituted by a belt conveyor 92 in which a suction box 91 is installed. The suction force of the suction box 91 is applied to the absorbent body 10 that has been molded, and the absorbent body 10 is removed from the mold 2. Transport. In order to stabilize the demolding, air may be sent from the inside of the rotary drum 31 to the flow passage 23.
In FIG. 1, the absorber 10 is temporarily fixed to the belt conveyor 92 by a suction force, and the first sheet 11 side is a flat surface. It is a curved shape close to the shape of the outer peripheral surface, and when used in an absorbent article, it becomes easy to follow the curved shape in the front-rear direction (abdomen-dorsal direction) of the body.

次に、本発明の吸収体の製造方法の実施形態を、前記実施形態の製造装置１による製造方法に基づいて説明する。   Next, an embodiment of a manufacturing method of an absorber of the present invention is described based on a manufacturing method by manufacturing device 1 of the above-mentioned embodiment.

まず、製造装置１を起動させ、成形型２に原料を供給する前に、回転ドラム３２の回転に伴って回転している成形型２の成形面２２に、第２シート供給手段７によって第２シート１２を供給する。そして、前記吸引ポンプによって第２シート１２を成形面２２に吸着させる。第２シート１２としては、従来から吸収体に使用されている紙、不織布等が用いられる。   First, before the manufacturing apparatus 1 is activated and the raw material is supplied to the mold 2, the second sheet supply means 7 causes the second sheet supply means 7 to apply the second sheet feeding means 7 to the molding surface 22 rotating with the rotation of the rotary drum 32. A sheet 12 is supplied. Then, the second sheet 12 is adsorbed to the molding surface 22 by the suction pump. As the 2nd sheet | seat 12, the paper, the nonwoven fabric, etc. which are conventionally used for the absorber are used.

第２シート１２は、回転ドラム３２の内面においてその形状に沿わなければならないため、（１）第１シート１１を中高部に相当する幅に用いる、（２）伸張しやすい材料（例えば不織布）を使用する、（３）第１シート１１適用後型押しする等の材料や方法を用いて、中央部が盛り上がった中高部を形成し易くすることができる。   Since the second sheet 12 must conform to the shape of the inner surface of the rotary drum 32, (1) the first sheet 11 is used in a width corresponding to the middle-high part, and (2) a material that is easily stretched (for example, a nonwoven fabric). It is possible to easily form the middle and high portions where the central portion is raised by using materials and methods such as (3) embossing after application of the first sheet 11.

次に、原料供給手段４のノズル４５から成形型２２の凹部２１に、原料を供給する。原料は、貯留タンク４１、４２に貯留された発泡体の構成成分と、タンク４３に貯留された吸収性ポリマーとを混合機４４で混合して調製する。また、吸収性ポリマーには、従来から吸収性物品に用いられている吸収性ポリマーが用いられる。   Next, the raw material is supplied from the nozzle 45 of the raw material supply means 4 to the recess 21 of the mold 22. The raw material is prepared by mixing the constituents of the foam stored in the storage tanks 41 and 42 and the absorbent polymer stored in the tank 43 with the mixer 44. Moreover, the absorbent polymer conventionally used for the absorbent article is used for the absorbent polymer.

前記熱可塑性ポリマーとしては、ポリエチレンやポリプロピレン等のポリオレフィンが好ましいが、ポリウレタンも使用できる。   The thermoplastic polymer is preferably a polyolefin such as polyethylene or polypropylene, but polyurethane can also be used.

前記ガス発泡剤としては、二酸化炭素、ヘリウム、窒素等のガスが使用可能であり、水と空気を混合したものも使用できる。   As the gas blowing agent, a gas such as carbon dioxide, helium or nitrogen can be used, and a mixture of water and air can also be used.

前記界面活性剤としては、樹脂との相溶性がよく、かつ樹脂の冷却後は徐々に樹脂表面に析出する半相溶性の材料が好ましく、具体的には特開平３−１８５１６７号に用いられている界面活性剤が好ましい。   The surfactant is preferably a semi-compatible material that has good compatibility with the resin and gradually precipitates on the resin surface after the resin is cooled. Specifically, the surfactant is used in JP-A-3-185167. The surfactant is preferred.

前記繊維材料は、前記熱可塑性ポリマーよりも融点が高いものであれば良いが、親水性材料としては、パルプやレーヨンが好ましく、熱可塑性繊維材料としては融点が３０℃以上高いポリエステルが好ましい。この繊維材料が配合された場合、毛管径を小さくすることができるため、吸液性を高めることができる。このほか、使用する材料による特性として、親水性材料の使用では発泡体を界面活性剤なしで吸液性とすることができる、熱可塑性繊維材料では（高い発泡倍率であっても）スケルトン構造が安定となるなどの効果が得られる。   The fiber material only needs to have a melting point higher than that of the thermoplastic polymer, but the hydrophilic material is preferably pulp or rayon, and the thermoplastic fiber material is preferably polyester having a melting point of 30 ° C. or higher. When this fiber material is blended, the capillary diameter can be reduced, so that the liquid absorbency can be increased. In addition, as a characteristic of the material used, the use of a hydrophilic material allows the foam to be liquid-absorbing without a surfactant, and the thermoplastic fiber material has a skeleton structure (even at a high expansion ratio). Effects such as being stable can be obtained.

次に、前記原料が供給された成形型２を塞ぐように第１シート供給手段５で第１シート１１を供給し、さらに、第１シート支持手段６で第１シート１１を成形型２に押圧し、第１シート１１で連続気泡発泡体１３の成形面の一部を形成する。   Next, the first sheet 11 is supplied by the first sheet supply means 5 so as to close the mold 2 supplied with the raw material, and further, the first sheet 11 is pressed against the mold 2 by the first sheet support means 6. Then, a part of the molding surface of the open cell foam 13 is formed by the first sheet 11.

第１シート１１は、ポリプロピレン製の不織布や液不透過性を有するポリエチレンフィルム等を用いることができる。   For the first sheet 11, a polypropylene nonwoven fabric or a liquid-impermeable polyethylene film can be used.

そして、回転体３を回転させながら、成形型２内で前記原料を発泡させて連続気泡発泡体１３を成形する。本実施形態では、回転体３の回転に伴う成形型２の移動中に前記原料の発泡と発泡体の安定化の過程を完了する。安定した発泡を得るために、成形型２は発泡原料注入時に４０〜９０℃、好ましくは５０〜７０℃の範囲、吸引等により５〜１５℃程度温度が低下するように、吸引条件・温度条件を調節する。このように製造することで、発泡体が回転体３（第２シート）と接触した際、接触した表面で十分発泡が行われないうちに固化することが防止できる。発泡率は５０％以上、好ましくは１００〜５００％である。斯かる発泡倍率であると得られる吸収体が硬くなりすぎず、形状（特に使用時）の安定性もよくなる。   And while rotating the rotating body 3, the said raw material is foamed within the shaping | molding die 2, and the open-cell foam 13 is shape | molded. In the present embodiment, the process of foaming the raw material and stabilizing the foam is completed during the movement of the mold 2 accompanying the rotation of the rotating body 3. In order to obtain stable foaming, the molding die 2 is in the range of 40 to 90 ° C., preferably in the range of 50 to 70 ° C. when the foaming raw material is injected. Adjust. By manufacturing in this way, when the foam comes into contact with the rotating body 3 (second sheet), it is possible to prevent solidification before foaming is sufficiently performed on the contacted surface. The foaming rate is 50% or more, preferably 100 to 500%. When the foaming ratio is such, the obtained absorbent body does not become too hard, and the stability of the shape (particularly during use) is also improved.

ローラー６１は複数用いられており、第１シート１１側に発泡体が過度に飛び出すことを防止し、第１シート側１１が第２シート１２側より早く冷却することができる。このため、第１シート１１側は、第２シート側１２よりも発泡が抑えられているか、発泡体が圧縮されるため、小さな発泡径のものを得易い。   A plurality of rollers 61 are used, the foam can be prevented from excessively jumping out to the first sheet 11 side, and the first sheet side 11 can be cooled earlier than the second sheet 12 side. For this reason, the first sheet 11 side is less foamed than the second sheet side 12 or the foam is compressed.

発泡が十分行われた段階で、発泡体の各発泡の膜を除去又は破壊（以下連続気泡化とする）するため、上記ローラー６１あるいは別のローラー（図示せず）を用いる。上記ローラー６１を用いる場合には、発泡中の前記突出を行わせ、その後８０〜１２０℃の過熱状態（使用する熱可塑性ポリマーによって異なる）で圧搾・整形するが、吸収体１０の形状や連続気泡化の調整のし易さからは、別のローラーが好ましい。   In order to remove or destroy (hereinafter referred to as open cell formation) each foamed film of the foam when foaming is sufficiently performed, the roller 61 or another roller (not shown) is used. In the case of using the roller 61, the protrusion during foaming is performed and then compressed and shaped in an overheated state at 80 to 120 ° C. (depending on the thermoplastic polymer used). Another roller is preferable from the viewpoint of easy adjustment.

別のローラーとしては、凹部２１にローラーの一部が入り込むことが好ましいため、回転体３１の凹部２１と略同じか狭い幅のローラーであることが好ましく、回転体３１の凹部に組合せ可能な凸部が形成されていること、根元が２〜５ｍｍ程度の径を有する針状物や突起が設けられていることなどがより好ましい。
搬送手段９以降の後工程にプレスローラを配置し、これにより各発泡の膜を除去又は破壊しても良い。 Another roller is preferably a roller having a width substantially the same as or narrower than the concave portion 21 of the rotating body 31 because it is preferable that a part of the roller enters the concave portion 21. It is more preferable that the portion is formed and that a needle-like object or protrusion having a diameter of about 2 to 5 mm at the base is provided.
A press roller may be arranged in a subsequent process after the conveying means 9 so that each foamed film may be removed or destroyed.

そして、連続気泡発泡体１３の成形が完了した吸収体１０に搬送手段９の吸引ボックス９１の吸引力を作用させ、吸収体１０を成形型２から脱型させ、ベルトコンベアー９２で次工程に搬送する。   Then, the suction force of the suction box 91 of the transport means 9 is applied to the absorbent body 10 in which the molding of the open-cell foam 13 has been completed, the absorbent body 10 is removed from the mold 2 and transported to the next process by the belt conveyor 92. To do.

以上説明したように、本実施形態の製造装置１及び製造方法によれば、所望の形状の連続気泡発泡体１３が第１、第２シート１１、１２で包まれた吸収体１０を好適に製造することができる。また、本実施形態では、第１シート支持手段６によって、成形面の一部を構成する第１シート１１を支持した状態で連続気泡発泡体１３の成形が行われるので、連続気泡発泡体１３の成形型２からの膨出を防ぎ且つ第１シート１１で連続気泡発泡体１３を包むことができる。さらに、連続気泡発泡体１３が第１、第２シート１１、１２で包まれているため、成形型２からの脱型を容易に行うことができる。また、発泡体が直接成形型２に接しないため、成形型２が汚れにくく、メンテナンスを行いやすい。   As described above, according to the manufacturing apparatus 1 and the manufacturing method of the present embodiment, the absorbent body 10 in which the open-cell foam 13 having a desired shape is wrapped with the first and second sheets 11 and 12 is preferably manufactured. can do. In this embodiment, since the first cell support means 6 molds the open-cell foam 13 in a state where the first sheet 11 constituting a part of the molding surface is supported, the open-cell foam 13 The bulge from the mold 2 can be prevented and the open cell foam 13 can be wrapped with the first sheet 11. Furthermore, since the open cell foam 13 is wrapped with the first and second sheets 11 and 12, the mold can be easily removed from the mold 2. Further, since the foam does not directly contact the mold 2, the mold 2 is not easily soiled and maintenance is easy.

本発明は、前記実施形態に制限されない。
本発明は、前記実施形態のように、第１及び第２シートで連続気泡発泡体を覆いながら成形することが好ましいが、第１又は第２シートの一方を使用せずに成形することもできる。 The present invention is not limited to the embodiment.
The present invention is preferably molded while covering the open-cell foam with the first and second sheets as in the above embodiment, but can be molded without using one of the first or second sheets. .

本発明の吸収体の製造方法及び装置によれば、所望の形状を有する連続気泡発泡体を具備する吸収体を好適に製造することができる。本発明は、生理用ナプキン、失禁パッド、使い捨ておむつ等の吸収性物品に使用される吸収体のほか、吸収体以外に使用される連続気泡発泡体の製造にも適用することができる。   According to the method and apparatus for producing an absorbent body of the present invention, an absorbent body comprising an open-cell foam having a desired shape can be suitably produced. The present invention can be applied to the production of open-cell foams used for other than absorbent bodies, as well as absorbent bodies used for absorbent articles such as sanitary napkins, incontinence pads, and disposable diapers.

本発明の吸収体の製造装置の一実施形態を模式的に示す図である。It is a figure which shows typically one Embodiment of the manufacturing apparatus of the absorber of this invention. 本発明の吸収体の製造装置の一実施形態における成形型を模式的に示す斜視図である。It is a perspective view which shows typically the shaping | molding die in one Embodiment of the manufacturing apparatus of the absorber of this invention.

符号の説明Explanation of symbols

１ 吸収体の製造装置
２ 成形型
２１ 凹部
２２ 成形面
３ 回転体
４ 原料供給手段
５ 第１シート供給手段
６ 第１シート支持手段
７ 第２シート供給手段
８ 吸引手段
９ 搬送手段
１０ 吸収体
１１ 第１シート
１２ 第２シート
１３ 連続気泡発泡体
DESCRIPTION OF SYMBOLS 1 Absorber manufacturing apparatus 2 Mold 21 Recess 22 Molding surface 3 Rotating body 4 Raw material supply means 5 First sheet supply means 6 First sheet support means 7 Second sheet supply means 8 Suction means 9 Conveyance means 10 Absorber 11 First 1 sheet 12 2nd sheet 13 Open-cell foam

Claims (7)

吸液性の連続気泡発泡体を具備する吸収体の製造方法であって、
回転ドラムの周部に複数配置された、成形する前記連続気泡発泡体の形状に対応した凹部の内面を有する成形型内に前記連続気泡発泡体の原料を供給し、その後、前記原料が供給された前記成形型を塞ぐように第１シートを供給し、前記成形型の配置された前記回転ドラムの周面に周回軌道に沿うように配置されたローラー群に巻回されたベルトを用いて前記第１シートを前記成形型に押圧し、前記回転ドラムを回転させながら前記成形型内で前記原料を発泡させて前記連続気泡発泡体を成形すると共に前記第１シートで該連続気泡発泡体の成形面の一部を形成する吸収体の製造方法。 A method for producing an absorbent comprising a liquid-absorbing open-cell foam,
The raw material of the open-cell foam is supplied into a mold having a concave surface corresponding to the shape of the open-cell foam to be molded, which is arranged in a plurality around the periphery of the rotating drum , and then the raw material is supplied. In addition, the first sheet is supplied so as to close the mold, and the belt wound around a roller group disposed along a circular path on the circumferential surface of the rotating drum on which the mold is disposed is used. While pressing the first sheet against the mold and rotating the rotating drum , the raw material is foamed in the mold to form the open-cell foam, and the open-cell foam is molded with the first sheet. The manufacturing method of the absorber which forms a part of surface . 前記成形型に前記原料を供給する前に該成形型の成形面に第２シートを供給し、前記成形型の前記凹部の前記内面に設けられた流通路を通して該第２シートを該内面に吸着させ、該第２シートを該成形型と該原料との間に介在させて前記連続気泡発泡体を成形する請求項１に記載の吸収体の製造方法。 Before supplying the raw material to the molding die, the second sheet is supplied to the molding surface of the molding die, and the second sheet is adsorbed to the inner surface through a flow passage provided in the inner surface of the concave portion of the molding die. The method for producing an absorbent body according to claim 1, wherein the open-cell foam is formed by interposing the second sheet between the mold and the raw material. 前記成形型内で前記原料を発泡させて発泡体を形成した後、前記成形型の前記凹部と同じ幅か或いは狭い幅を有する、前記ローラー群とは別に前記回転ドラムの周面に配置された加熱状態のローラーを用いて、前記成形型内に形成された前記発泡体を圧搾し、該発泡体の各発泡の膜を除去又は破壊して、前記連続気泡発泡体を成形する請求項１又は２に記載の吸収体の製造方法。 After forming the foam by foaming the raw material in the mold, the foam has the same or narrow width as the concave portion of the mold, and is disposed on the peripheral surface of the rotating drum separately from the roller group The said open-cell foam is shape | molded by squeezing the said foam formed in the said shaping | molding die using the roller of a heating state, removing or destroying each foam film | membrane of this foam. 2. A method for producing the absorber according to 2. 吸液性の連続気泡発泡体を具備する吸収体の製造装置であって、
成形する前記連続気泡発泡体の形状に対応した凹部の内面を有する成形型が周部に複数配置され回転可能に設けられた回転ドラムと、
前記成形型に前記連続気泡発泡体の原料を供給する原料供給手段と、
前記回転ドラムの周部に第１シートを供給する第１シート供給手段と、
前記成形型の配置された前記回転ドラムの周面に周回軌道に沿うように配置されたローラー群に巻回されたベルトを有し、前記成形型とともに前記連続気泡発泡体の成形面を形成するように第１シートを該ベルトで支持する支持手段とを備えている吸収体の製造装置。 An absorbent manufacturing apparatus comprising a liquid-absorbing open-cell foam,
A rotating drum provided rotatably with a plurality of molds having inner surfaces of recesses corresponding to the shape of the open-cell foam to be molded;
Raw material supply means for supplying the raw material of the open-cell foam to the mold ,
First sheet supply means for supplying a first sheet to the periphery of the rotating drum;
A belt wound around a group of rollers arranged on a circumferential surface of the rotating drum on which the molding die is arranged, and forming a molding surface of the open cell foam together with the molding die; As described above, an absorbent body manufacturing apparatus comprising a supporting means for supporting the first sheet with the belt . 前記成形型の成形面に第２シートを供給する第２シート供給手段を備えている請求項４に記載の吸収体の製造装置。 The absorber manufacturing apparatus according to claim 4, further comprising a second sheet supply unit that supplies a second sheet to the molding surface of the mold. 前記成形型に前記成形面において開口する流通路が設けられているとともに、該流通路を通して前記第２シートを前記内面に吸着させる吸引手段を備えている請求項５に記載の吸収体の製造装置。 The absorbent body manufacturing apparatus according to claim 5 , wherein the molding die is provided with a flow passage that opens at the molding surface, and includes suction means for adsorbing the second sheet to the inner surface through the flow passage. . 前記成形型の前記凹部と同じ幅か或いは狭い幅を有する、前記ローラー群とは別に前記回転ドラムの周面に配置された加熱状態のローラーを備えている請求項４〜６の何れか１項に記載の吸収体の製造装置。7. The apparatus according to claim 4, further comprising a heated roller disposed on a peripheral surface of the rotating drum, separately from the roller group, having the same width as or narrower than the concave portion of the mold. An absorbent body manufacturing apparatus according to claim 1.
JP2006172036A 2006-06-22 2006-06-22 Absorbent manufacturing method and manufacturing apparatus Expired - Fee Related JP5057708B2 (en)

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