JP2569953B2 - Method for producing liquid-absorbent sheet - Google Patents
Method for producing liquid-absorbent sheetInfo
- Publication number
- JP2569953B2 JP2569953B2 JP2339038A JP33903890A JP2569953B2 JP 2569953 B2 JP2569953 B2 JP 2569953B2 JP 2339038 A JP2339038 A JP 2339038A JP 33903890 A JP33903890 A JP 33903890A JP 2569953 B2 JP2569953 B2 JP 2569953B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- absorbent
- absorbent resin
- resin
- heat
- 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
Landscapes
- General Preparation And Processing Of Foods (AREA)
- Laminated Bodies (AREA)
- Paper (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、食品等から生じる水蒸気やドリップ、ある
いは揚げ物の余分な油等を吸収、除去し、食品の味覚を
保持するための、吸液性シートを製造する方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention is directed to absorbing and removing water vapor and drip generated from food or the like, or excess oil or the like of fried food, and maintaining the taste of the food. The present invention relates to a method for producing a functional sheet.
＜従来の技術＞ 従来、この種の包装材料としては、例えば特公昭63−
19545号公報、実開昭58−126986号公報、特開平２−804
8号公報に示されたものが知られている。<Conventional technology> Conventionally, as this type of packaging material, for example,
No. 19545, Japanese Utility Model Application Laid-Open No. 58-126986, JP-A-2-804
The one disclosed in Japanese Patent Publication No. 8 is known.
特公昭63−19545号公報、実開昭58−126986号公報に
示されたものは、高吸収性樹脂をバインダーに混合し、
フィルムや板紙等の基体シートに塗布し、透水性シート
で被覆するものであった。このものに使用される高吸水
性樹脂は、接着性バインダーに完全に被覆されてしまう
ので、使用する高吸水性樹脂の割には吸水量が少なく、
効率的ではなかった。例えば、特公昭63−19545号公報
に示されるシートの吸水性は、約50〜100g/m2程度であ
った。一方、特開平２−8048号公報に示されたものは、
基体シートと透水性シートの間に、高吸水性樹脂を散布
し、溶融熱接着性樹脂により基体シートと透水性シート
を積層することによって、高吸水性樹脂を溶融熱接着性
樹脂に一部が露出した状態で埋没させ、高い吸水性を得
るものである。このシートにおいて、前記特公昭63−19
545号公報に示されるシートと同じ吸水量を得るために
必要な高吸水性樹脂の量は、上記シートの約50％で済
む。JP-B-63-19545 and JP-A-58-122696 show that a highly absorbent resin is mixed with a binder,
It was applied to a base sheet such as a film or paperboard and covered with a water-permeable sheet. Since the superabsorbent resin used for this one is completely covered with the adhesive binder, the water absorption is small for the superabsorbent resin used,
It was not efficient. For example, the water absorption of the sheet disclosed in JP-B-63-19545 was about 50 to 100 g / m 2 . On the other hand, what is disclosed in JP-A-2-8048 is
By spraying the superabsorbent resin between the base sheet and the water permeable sheet, and laminating the base sheet and the water permeable sheet with the molten heat adhesive resin, the super water absorbent resin is partially converted into the molten heat adhesive resin. It is buried in an exposed state to obtain high water absorption. In this sheet, the aforementioned JP-B-63-19
The amount of superabsorbent resin required to obtain the same amount of water absorption as the sheet disclosed in Japanese Patent No. 545 is only about 50% of the above sheet.
＜発明が解決しようとする課題＞ 前述した特開平２−8048号公報に示される吸水性シー
トは、特公昭63−19545号公報、実開昭58−126986号公
報等に示されるものより高い吸水性を得ることができ、
使用する高吸水性樹脂の効率がよく、好ましいものであ
る。しかしながら、特開平２−8048号公報の構成である
と、基体シートが耐水性に劣る材料であった場合、溶融
熱接着性樹脂が埋没された高吸水性樹脂の一部が、前記
板紙側にも接触し、吸水した水分等が板紙に移行し、板
紙の強度が劣化してしまいといった問題があった。特
に、吸水性シートを板紙を用いて差制し、箱状の包装容
器とした場合は、板紙の強度劣化は包装容器として重大
な欠点となる。<Problems to be Solved by the Invention> The water-absorbing sheet described in JP-A-2-8048 described above has a higher water absorption than those described in JP-B-63-19545 and JP-A-58-122696. Sex,
The superabsorbent resin used is efficient and preferred. However, according to the structure of JP-A-2-8048, when the base sheet is made of a material having poor water resistance, a part of the superabsorbent resin in which the molten heat-adhesive resin is buried is partially disposed on the paperboard side. However, there is a problem that the absorbed water and the like migrate to the paperboard, and the strength of the paperboard is deteriorated. In particular, when the water-absorbent sheet is formed by using paperboard to form a box-shaped packaging container, the deterioration of the strength of the paperboard becomes a serious drawback as a packaging container.
そこで本発明は、板紙を用いた吸液性シートであって
も、吸液した際、板紙の劣化がない吸液性シートを得る
方法を提供するものである。Therefore, the present invention provides a method for obtaining a liquid-absorbent sheet that does not deteriorate when the liquid is absorbed, even if the liquid-absorbent sheet uses paperboard.
＜課題を解決するための手段＞ すなわち本発明は、合成樹脂皮膜からなる防水層を有
する板紙の、前記防水層上に、吸液性を有る吸液性樹脂
粉末を散布し、次いで、前記吸液性樹脂粉末上に、溶融
熱接着性樹脂を、吸液性樹脂粉末の平均粒子径よりも薄
い厚さに押し出して吸液性樹脂粉末を被覆し、さらにそ
の上に、通液性を有し、かつ、前記吸液性樹脂粉末を透
過させない通液性シートを、熱接着性樹脂が固化する前
に被せ、圧着して、熱接着性樹脂と通液性シートを積層
することを特徴とする、吸液性シートの製造方法であ
る。<Means for Solving the Problems> That is, the present invention relates to a paperboard having a waterproof layer made of a synthetic resin film, by spraying an absorbent resin powder having an absorbent property on the waterproof layer, On the liquid resin powder, the molten heat-adhesive resin is extruded to a thickness smaller than the average particle diameter of the liquid absorbent resin powder, thereby covering the liquid absorbent resin powder, and further having liquid permeability. And, the liquid-permeable sheet that does not transmit the liquid-absorbent resin powder is covered before the heat-adhesive resin is solidified, pressed, and laminated with the heat-adhesive resin and the liquid-permeable sheet. A method for producing a liquid-absorbent sheet.
また、板紙上に、熱可塑性樹脂を押し出しコーティン
グして防水層を形成し、防水層が固化した後、防水層上
に、吸液性を有する吸液性樹脂粉末を散布し、次いで、
前記吸液性樹脂粉末上に、溶融熱接着性樹脂を、吸液性
樹脂粉末の平均粒子径よりも薄い厚さに押し出して吸液
性樹脂粉末を被覆し、さらにその上に、通液性を有し、
かつ、前記吸液性樹脂粉末を透過させない通液性シート
を熱接着性樹脂が固化する前に被せ、圧着して、熱接着
性樹脂と通液性シートを積層することを特徴とする、吸
液性シートを製造方法である。Further, on a paperboard, a thermoplastic resin is extruded and coated to form a waterproof layer, and after the waterproof layer is solidified, on the waterproof layer, a liquid-absorbing resin powder having a liquid absorbing property is sprayed,
On the liquid-absorbent resin powder, the molten heat-adhesive resin is extruded to a thickness smaller than the average particle diameter of the liquid-absorbent resin powder, and coated with the liquid-absorbent resin powder. Has,
In addition, the liquid-permeable sheet that does not allow the liquid-absorbent resin powder to pass through is covered before the heat-adhesive resin is solidified, pressed and laminated, and the heat-adhesive resin and the liquid-permeable sheet are laminated. This is a method for producing a liquid sheet.
また、合成樹脂皮膜からなる防水層を有する板紙の、
前記防水層上に、吸液性樹脂粉末の平均粒子径よりも薄
い厚さに溶融熱接着性樹脂を押し出し、次いで吸液性を
有する吸液性樹脂粉末を散布した、通液性を有し、か
つ、前記吸液性樹脂粉末を透過させない通液性シート
を、前記熱接着性樹脂が固化する前に吸液性樹脂粉末が
熱接着性樹脂に接するようにして重ね合わせ、圧着し
て、熱接着性樹脂と通液性シートを積層することを特徴
とする、吸液性シートの製造方法である。In addition, paperboard having a waterproof layer made of a synthetic resin film,
On the waterproof layer, extruded the molten heat-adhesive resin to a thickness smaller than the average particle diameter of the liquid-absorbent resin powder, and then sprayed with a liquid-absorbent resin powder having liquid-absorbing properties, having liquid permeability And, the liquid-permeable sheet that does not allow the liquid-absorbent resin powder to permeate, the liquid-absorbent resin powder is overlapped with the heat-adhesive resin before the heat-adhesive resin is solidified, and pressed, A method for producing a liquid-absorbent sheet, comprising laminating a heat-adhesive resin and a liquid-permeable sheet.
また、板紙上に、熱可塑性樹脂を押し出しコーティン
グして防水層を形成し、防水層を固化した後、該防水層
上に、吸液性樹脂粉末の平均粒子径よりも薄い厚さに溶
融熱接着性樹脂を押し出し、次いで吸液性を有する吸液
性樹脂粉末を散布した、通液性を有し、かつ、前記吸液
性樹脂粉末を透過させない通液性シートを、前記熱接着
性樹脂が固化する前に吸液性樹脂粉末が熱接着性樹脂に
接するようにして重ね合わせ、圧着して、熱接着性樹脂
と通液性シートを積層することを特徴とする、吸液性シ
ートの製造方法である。Further, a waterproof layer is formed by extruding and coating a thermoplastic resin on a paperboard, and after solidifying the waterproof layer, the heat is applied on the waterproof layer to a thickness smaller than the average particle diameter of the liquid absorbent resin powder. An adhesive resin is extruded, and then a liquid-absorbent resin powder having a liquid-absorbing property is sprayed thereon, the liquid-permeable sheet having a liquid-permeability and not allowing the liquid-absorbent resin powder to pass through the heat-adhesive resin. The liquid-absorbent sheet is characterized in that the liquid-absorbent sheet is overlapped with the thermal-adhesive resin before being solidified so that the liquid-absorptive resin is in contact with the thermal-adhesive resin, and then pressure-bonded to laminate the thermal-adhesive resin and the liquid-permeable sheet. It is a manufacturing method.
＜作用＞ 上述した本発明の方法により製造される吸液性シート
は、板紙と吸液性樹脂粉末の間に防水層が形成されるの
で、吸液性樹脂粉末が食品からの液体を通液性シートを
介して吸収しても、防水層により液体が板紙に移行する
ことが防がれ、全体としての強度劣化が生じないもので
ある。<Operation> In the liquid-absorbent sheet produced by the method of the present invention described above, the waterproof layer is formed between the paperboard and the liquid-absorbent resin powder, so that the liquid-absorbent resin powder can pass liquid from food. Even if absorbed through the permeable sheet, the liquid is prevented from migrating to the paperboard by the waterproof layer, and the strength does not deteriorate as a whole.
＜実施例＞ 次に、図面を参照して本発明の実施例を説明する。第
１図は本発明の方法の一実施例を示す説明図、第２図は
第１図に示す実施例により得られる吸液性シートの断面
図、第３図は本発明の他の方法の実施例を示す説明図で
ある。<Example> Next, an example of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing one embodiment of the method of the present invention, FIG. 2 is a cross-sectional view of an absorbent sheet obtained by the embodiment shown in FIG. 1, and FIG. It is explanatory drawing which shows an Example.
本発明で用いる板紙（１）は、例えば紙箱に一般的に
用いられる、坪量150〜700g/m2の板紙が使用できる。As the paperboard (1) used in the present invention, for example, a paperboard having a basis weight of 150 to 700 g / m 2 generally used for a paper box can be used.
板紙（１）には、防水層（２）が形成される。防水層
（２）は、水や油等の液体を板紙（１）に移行させない
ためのものであり、合成樹脂皮膜からなる。この防水層
（２）は、合成樹脂フィルムを接着剤を介して積層して
もよいが、第１図、第３図に示すように、押し出しダイ
（９）から溶融熱可塑性樹脂（21）をフィルム状に押し
出し、積層する方法が簡便である。A waterproof layer (2) is formed on the paperboard (1). The waterproof layer (2) is for preventing liquid such as water and oil from migrating to the paperboard (1), and is made of a synthetic resin film. The waterproof layer (2) may be formed by laminating a synthetic resin film via an adhesive, but as shown in FIGS. 1 and 3, a molten thermoplastic resin (21) is extruded from an extrusion die (9). The method of extruding and laminating into a film shape is simple.
本発明で使用される吸液性樹脂粉末（３）は、水、水
溶液、油等を吸収、保持可能なもので、種々のものが知
られている。例えば、水、水溶液を吸収、保持可能なも
のとしては、デンプン−アクリル酸ナトリウムグラフト
重合体、デンプン−アクリロニトリルグラフト重合体の
加水分解物、一部架橋されたデンプン−ポリ（メタ）ア
クリル酸重合体、一部架橋されたデンプン−ポリメタク
リル酸メチルの加水分解物、および上記物質の塩等のデ
ンプン−グラフト重合系のもの、あるいはポリアクリル
酸塩の部分架橋物、ポリイソブチレン−無水マレイン酸
塩の部分架橋物、メタクリル酸メチル−酢酸ビニル共重
合体の加水分解物に代表される架橋合成樹脂系のもの等
があげられる。例えばデンプン系のものは三洋化成
（株）、日澱化学から市販されており、他に、セルロー
ス系は旭化成工業（株）、ダイセル化学（株）から、ポ
リアクリル酸塩系は（株）花王、日本触媒化学工業
（株）、荒川化学（株）、製鉄化学（株）、ライオン
（株）、日本合成化学（株）、三菱油化（株）から、ア
クリル酸塩−ビニルアルコール共重合体系は住友化学
（株）から、イソブチレン−無水マレイン酸共重合体系
はクラレイソプレンケミカル（株）から、それぞれ市販
されている。また、油を吸収、保持可能なものとして
は、日本触媒化学工業（株）、日本ゼオン（株）が、ポ
リノルボルネンを主体とした、吸油性樹脂を開発してい
る。これら吸液性樹脂（３）は、目的に応じて複数種を
併用することができる。The liquid-absorbent resin powder (3) used in the present invention is capable of absorbing and retaining water, an aqueous solution, oil and the like, and various types are known. For example, those capable of absorbing and retaining water and an aqueous solution include starch-sodium acrylate graft polymer, hydrolyzate of starch-acrylonitrile graft polymer, and partially cross-linked starch-poly (meth) acrylic acid polymer A partially cross-linked starch-polymethyl methacrylate hydrolyzate, and a starch-graft polymerization system such as a salt of the above substance, or a partially cross-linked polyacrylate, polyisobutylene-maleic anhydride Examples thereof include partially crosslinked products and crosslinked synthetic resin materials represented by hydrolysates of methyl methacrylate-vinyl acetate copolymer. For example, starch-based products are commercially available from Sanyo Kasei Co., Ltd. and Niseki Chemical, while cellulose-based products are available from Asahi Kasei Kogyo Co., Ltd. and Daicel Chemical Co., Ltd., and polyacrylates are available from Kao Corporation. From Nippon Shokubai Chemical Industry Co., Ltd., Arakawa Chemical Co., Ltd., Iron and Steel Chemical Co., Ltd., Lion Co., Ltd., Nippon Synthetic Chemical Co., Ltd., Mitsubishi Yuka Co., Ltd. Is commercially available from Sumitomo Chemical Co., Ltd., and the isobutylene-maleic anhydride copolymer system is commercially available from Kuraray Isoprene Chemical Co., Ltd. As those capable of absorbing and retaining oil, Nippon Shokubai Chemical Industry Co., Ltd. and Nippon Zeon Co., Ltd. have developed an oil-absorbing resin mainly composed of polynorbornene. These liquid absorbing resins (3) can be used in combination of two or more depending on the purpose.
吸液性樹脂（３）は、本発明の第１、第２の発明にお
いては、固化した状態の防水層（２）上に散布され、こ
の吸液性樹脂（３）上に溶融熱接着性樹脂（４）が押し
出しダイ（８）から押し出され、さらに、通液性シート
（５）が被せられて積層される。このとき溶融熱接着性
樹脂（４）は、吸液性樹脂（３）の平均粒径よりも薄い
厚さ、好ましくは吸液性樹脂（３）の平均粒径に対して
30〜50％の厚さに押し出され、圧着される。これによ
り、吸液性樹脂（３）が熱接着性樹脂（４）により防水
層（２）上に固定さるとともに、吸液性樹脂（３）が熱
接着性樹脂（４）を突き破って通液性シート（５）側に
一部露出して、吸液性を発揮する（第２図参照）。熱接
着性樹脂（４）の厚さが吸液性樹脂（３）の平均粒径よ
りも厚い場合はもちろん、上記数値よりも大きい場合に
は、吸液性樹脂（３）の多くは熱接着性樹脂（４）を突
き破ることができず、実質的な吸液効果が得られない。
他方、熱接着性樹脂（４）の厚さが上記数値より小さい
場合には、突き破られた孔が広がり、また、吸液性樹脂
（３）と熱接着性樹脂（４）の接触面積が小さくなるた
め、吸液性樹脂（３）が熱接着性樹脂（４）によって板
紙（防水層）上に保持されなくなり、脱落してしまう。In the first and second aspects of the present invention, the liquid-absorbent resin (3) is sprayed on the solidified waterproof layer (2), and melted and heat-adhered on the liquid-absorbent resin (3). The resin (4) is extruded from the extrusion die (8), and is further covered with the liquid-permeable sheet (5). At this time, the molten heat-adhesive resin (4) has a thickness smaller than the average particle diameter of the liquid-absorbent resin (3), and preferably has a thickness smaller than the average particle diameter of the liquid-absorbent resin (3).
Extruded to a thickness of 30-50% and crimped. As a result, the liquid-absorbent resin (3) is fixed on the waterproof layer (2) by the heat-adhesive resin (4), and the liquid-absorbent resin (3) breaks through the heat-adhesive resin (4) and passes through the liquid. Partially exposed to the non-conductive sheet (5) side, it exhibits liquid absorbing properties (see FIG. 2). When the thickness of the heat-adhesive resin (4) is larger than the average particle diameter of the liquid-absorbent resin (3) or larger than the above value, most of the liquid-absorbent resin (3) is thermally bonded. The resin (4) cannot be broken through, and a substantial liquid absorbing effect cannot be obtained.
On the other hand, when the thickness of the heat-adhesive resin (4) is smaller than the above value, the pierced hole is widened, and the contact area between the liquid-absorbent resin (3) and the heat-adhesive resin (4) is reduced. Since it becomes smaller, the liquid-absorbent resin (3) is not held on the paperboard (waterproof layer) by the heat-adhesive resin (4) and falls off.
なお、吸液性樹脂（３）の平均粒径は、板紙（防水
層）飢への散布作業性（飛散・散逸防止）の点から、30
μｍ以上とすることが好ましく、他方、吸液時に膨潤し
て体積増加することによる吸液性シートの凹凸化（変
形）や、吸液性樹脂（３）の脱落等を防止する目的で、
100μｍ以下とすることが好ましい。従って、熱接着性
樹脂（４）は、９〜50μｍの厚さに押し出されることが
好ましい。The average particle size of the liquid-absorbent resin (3) is 30% in view of the workability of spraying paperboard (waterproof layer) on hunger (prevention of scattering and dissipation).
μm or more. On the other hand, in order to prevent unevenness (deformation) of the liquid-absorbent sheet due to swelling and volume increase during liquid absorption, and to prevent the liquid-absorbent resin (3) from falling off.
It is preferable that the thickness be 100 μm or less. Therefore, the heat-adhesive resin (4) is preferably extruded to a thickness of 9 to 50 μm.
上記した熱接着性樹脂（４）としては、ポリオレフィ
ン樹脂が最も一般的であり、ポリエチレン、ポリプロピ
レンが代表的な樹脂である。また、通液性シート（５）
としては、通液性を有する、例えばセルロース系不織
布、ポリエチレン系不織布、ポリロプロピレン系不織
布、ポリエステル系不織布等の不織布や、紙、特に無サ
イズ紙等の通液性の良好なシートが使用できる。この通
液性シート（５）は、前述の吸液性樹脂（３）が透過し
て吸液性シートから脱落することがないよう、孔がきわ
めて小さいものであることが必要である。As the above-mentioned heat-adhesive resin (4), a polyolefin resin is the most common, and polyethylene and polypropylene are typical resins. In addition, the liquid-permeable sheet (5)
As a liquid-permeable sheet, for example, a nonwoven fabric such as a cellulose-based nonwoven fabric, a polyethylene-based nonwoven fabric, a polypropylene-based nonwoven fabric, and a polyester-based nonwoven fabric, or a sheet having good liquid permeability such as paper, particularly non-size paper, can be used. . The liquid-permeable sheet (5) needs to have extremely small holes so that the above-mentioned liquid-absorbent resin (3) does not permeate and drop from the liquid-absorbent sheet.
本発明の第３、第４の発明においては、第３図に示す
ように、吸液性樹脂（３）は、板紙（１）上に形成され
た防水層（２）の上に押し出しダイ（８）から押し出さ
れた、溶融熱接着性樹脂（４）上に散布される。この発
明において、吸液性樹脂（３）は、熱接着性樹脂（４）
にその一部が露出した状態で埋没する。従って、吸液性
樹脂（３）の散布は、熱接着性樹脂（４）が固化する前
に行われる必要があり、更に、通液性シート（５）も、
熱接着性樹脂（４）の接着力により積層されるため、熱
接着性樹脂（４）が固化する前に被覆、圧着される必要
がある。なお、この発明において熱接着性樹脂（４）の
厚さは、吸液性樹脂（３）は熱接着性樹脂（４）を突き
破らなくても通液性シート（５）側で一部が露出した状
態となるので、必ずしも吸液性樹脂（３）の平均粒子径
よりも薄い必要はないが、本発明では、吸液性樹脂
（３）を確実に露出させるために、熱接着性樹脂（４）
の厚さは吸液性樹脂（３）の平均粒子径よりも薄い厚さ
に設ける。In the third and fourth aspects of the present invention, as shown in FIG. 3, the liquid-absorbent resin (3) is extruded onto a waterproof layer (2) formed on a paperboard (1) by an extrusion die ( Sprayed on the molten heat-adhesive resin (4) extruded from 8). In the present invention, the liquid-absorbent resin (3) is a heat-adhesive resin (4).
Buried with a part of it exposed. Therefore, spraying of the liquid-absorbent resin (3) needs to be performed before the heat-adhesive resin (4) is solidified.
Since the layers are laminated by the adhesive force of the thermo-adhesive resin (4), the thermo-adhesive resin (4) needs to be coated and crimped before solidifying. In the present invention, the thickness of the heat-adhesive resin (4) is such that a part of the liquid-absorbent resin (3) on the liquid-permeable sheet (5) side does not break through the heat-adhesive resin (4). Since it is in an exposed state, it is not necessarily required to be thinner than the average particle diameter of the liquid-absorbent resin (3). However, in the present invention, in order to surely expose the liquid-absorbent resin (3), a heat-adhesive resin is used. (4)
Is thinner than the average particle diameter of the liquid-absorbent resin (3).
つぎに、本発明の具体例を説明するが、本発明はこの
実施例に限定されるものではない。Next, specific examples of the present invention will be described, but the present invention is not limited to these examples.
＜実施例１＞ 坪量320g/m2の板紙（三菱製紙（株）製、商品名：三
菱ハイパール）上に、押し出しダイより溶融低密度ポリ
エチレン樹脂（三井石油化学工業（株）製、商品名：ミ
ラソン16P）を厚さ30μｍのフィルム状に押し出し、積
層して防水層を形成した。この防水層が固化した後、防
水層上に、平均粒径50μｍのポリアクリル酸塩系高吸水
性樹脂（日本触媒化学工業（株）製、アクアリック（登
録商標）CA ML−50）を、パウダー散布装置にて、1.0g
/m2の割合で散布した。この板紙／防水層／高吸水性樹
脂の積層体の高吸水性樹脂側に、通水性の無サイズ紙
（東海パルプ（株）製、商品名:MCBタオル、坪量50g/
m2）を繰り出すとともに、両者の間に押し出しダイより
溶融ポリエチレン樹脂（三井石油化学工業（株）製、商
品名：ミラソン16P）を厚さ25μｍのフィルム状に押し
出し、直ちに圧着し、本発明の吸水性シートを得た。得
られた吸水性シートを観察したところ、高吸水性樹脂が
溶融ポリエチレン樹脂を突き破り、一部が無サイズ紙側
で露出していた。なお、シートの吸水量は、約210g/m2
であった。<Example 1> Melting low density polyethylene resin (manufactured by Mitsui Petrochemical Industry Co., Ltd., trade name) on a paperboard (manufactured by Mitsubishi Paper Mills, trade name: Mitsubishi Hyper) having a basis weight of 320 g / m 2 : Mirason 16P) was extruded into a film having a thickness of 30 μm and laminated to form a waterproof layer. After the waterproofing layer was solidified, a polyacrylate-based superabsorbent resin (Nippon Shokubai Chemical Industry Co., Ltd., Aquaric (registered trademark) CA ML-50) having an average particle size of 50 μm was placed on the waterproofing layer, 1.0g with powder sprayer
/ m 2 . On the superabsorbent resin side of the laminate of the paperboard / waterproof layer / superabsorbent resin, a water-permeable non-size paper (manufactured by Tokai Pulp Co., Ltd., trade name: MCB towel, basis weight 50g /
m 2 ) and a molten polyethylene resin (trade name: Mirason 16P, manufactured by Mitsui Petrochemical Industry Co., Ltd.) was extruded between the two from an extrusion die into a 25 μm-thick film, which was immediately press-bonded. A water-absorbent sheet was obtained. Observation of the resulting water-absorbent sheet revealed that the superabsorbent resin broke through the molten polyethylene resin and a portion was exposed on the non-sized paper side. The water absorption of the sheet is about 210 g / m 2
Met.
このシートを所定形状に打ち抜き、箱を作成し、内容
物として蒸した直後のシュウマイを収納したところ、内
容物から生じる水蒸気を吸水性樹脂が吸収、除去し、内
容物の味覚が低下することがなかった。また、板紙には
全く水が移行せず、箱としての強度が保たれた。When this sheet was punched into a predetermined shape, a box was created, and steamed sweets immediately after being steamed were stored as contents, the water-absorbent resin absorbed and removed water vapor generated from the contents, and the taste of the contents could be reduced. Did not. Further, no water was transferred to the paperboard at all, and the strength as a box was maintained.
＜実施例２＞ 坪量320g/m2の板紙（三菱製紙（株）製、商品名：三
菱ハイパール）上に、押し出しダイより溶融低密度ポリ
エチレン樹脂（三井石油化学工業（株）製、商品名：ミ
ラソン16P）を厚さ30μｍのフィルム状に押し出し、積
層して防水層を形成した。<Example 2> A low-density polyethylene resin (manufactured by Mitsui Petrochemical Industry Co., Ltd.) from an extrusion die on a paperboard having a basis weight of 320 g / m 2 (manufactured by Mitsubishi Paper Mills, trade name: Mitsubishi Hyper). : Mirason 16P) was extruded into a film having a thickness of 30 μm and laminated to form a waterproof layer.
一方、通水性の無サイズ紙（東海パルプ（株）製、商
品名:MCBタオル、坪量5g/m2）上に、平均粒系50μｍの
ポリアクリル酸塩系高吸水性樹脂（日本触媒化学工業
（株）製、アクアリック（登録商標）CA ML−50）をパ
ウダー散布装置にて0.5g/m2の割合で散布した。その
後、前記板紙／防水層の積層体の防水層と、無サイズ紙
の高吸水性樹脂散布側を対向させて、両者の間に押し出
しダイより溶融ポリエチレン樹脂（三井石油化学工業
（株）製、商品名：ミラソン16P）を厚さ15μｍのフィ
ルム状に押し出し、直ちに圧着し、本発明の吸液性シー
トを得た。得られた吸液性シートを観察したところ、高
吸水性樹脂は、一部を無サイズ紙側に露出した状態でポ
リエチレン樹脂に埋没していた。このシートの吸水量
は、約160g/m2であった。On the other hand, a polyacrylate-based superabsorbent resin with an average particle size of 50 μm (Nippon Shokubai Chemical Co., Ltd.) is placed on non-permeable paper (made by Tokai Pulp Co., Ltd., trade name: MCB towel, basis weight 5 g / m 2 ). AQUALIC (registered trademark) CA ML-50, manufactured by Kogyo Co., Ltd.) was sprayed at a rate of 0.5 g / m 2 using a powder spraying device. Then, the waterproofing layer of the laminate of the paperboard / waterproofing layer and the high-water-absorbing resin-dispersed side of the non-sized paper are opposed to each other, and a molten polyethylene resin (manufactured by Mitsui Petrochemical Industry Co., Ltd .; (Trade name: Mirason 16P) was extruded into a film having a thickness of 15 μm, and immediately pressed, to obtain a liquid-absorbent sheet of the present invention. Observation of the obtained liquid-absorbent sheet revealed that the highly water-absorbent resin was buried in the polyethylene resin in a state where a part thereof was exposed to the non-size paper side. The water absorption of this sheet was about 160 g / m 2 .
このシートを、所定形状に打ち抜き、箱を作成し、内
容物として焼きたてのピザパイを収納したところ、内容
物から生じる水蒸気を高吸水性樹脂が吸収、除去し、内
容物の味覚が低下することがなかった。また、板紙には
全く移行せず、箱としての強度が保たれた。When this sheet is punched into a predetermined shape, a box is created, and a freshly baked pizza pie is stored as a content, the water-absorbent resin absorbs and removes water vapor generated from the content, and the taste of the content is reduced. There was nothing. Also, it did not migrate to paperboard at all, and the strength as a box was maintained.
＜実施例３＞ 坪量320g/m2の板紙（三菱製紙（株）製、商品名：三
菱ハイパール）上に、押し出しダイより溶融低密度ポリ
エチレン樹脂（三井石油化学工業（株）製、商品名：ミ
ラソン16P）を厚さ30μｍのフィルムに押し出し、積層
して防水層を形成した。この防水層が固化した後、防水
層上に、平均粒系50μｍのポリアクリル酸塩系高吸水性
樹脂（日本触媒化学工業（株）製、アクアリック（登録
商標）CA ML−50）と、平均粒径40μｍのポリノルボル
ネン系吸油性樹脂（日本ゼオン（株）製）とを、パウダ
ー散布装置にてそれぞれ1.0g/m2の割合で散布した。こ
の板紙／防水層／高吸水性樹脂＋吸油性樹脂（吸液製樹
脂）の積層体の吸液性樹脂側に、通水性の無サイズ紙
（東海パルプ（株）性、商品名:MCBタオル、坪量50g/
m2）を繰り出すとともに、両者の間に押し出しダイより
溶融ポリエチレン樹脂（三井石油化学工業（株）製、商
品名：ミラソン16P）を厚さ20μｍのフィルム状に押し
出し、直ちに圧着し、本発明の吸水・吸油性シートを得
た。得られた吸水・吸油性シートの吸水量は、約210g/m
2であり、吸油量は50g/m2であった。Example 3 A low-density polyethylene resin (manufactured by Mitsui Petrochemical Industry Co., Ltd.) from an extrusion die on a paperboard (manufactured by Mitsubishi Paper Mills, trade name: Mitsubishi Hyper) having a basis weight of 320 g / m 2. : Mirason 16P) was extruded into a film having a thickness of 30 μm and laminated to form a waterproof layer. After the waterproof layer was solidified, on the waterproof layer, a polyacrylate-based superabsorbent resin having an average particle size of 50 μm (Nippon Shokubai Chemical Industry Co., Ltd., Aquaric (registered trademark) CA ML-50) was added. A polynorbornene-based oil-absorbent resin (manufactured by Nippon Zeon Co., Ltd.) having an average particle size of 40 μm was sprayed at a rate of 1.0 g / m 2 on a powder spraying device. On the liquid-absorbent resin side of the laminate of the paperboard / waterproof layer / high-water-absorbent resin + oil-absorbent resin (liquid-absorbent resin), a water-permeable non-sized paper (Tokai Pulp Co., Ltd., product name: MCB towel) , Basis weight 50g /
m 2 ), and between the two, a molten polyethylene resin (trade name: Mirason 16P, manufactured by Mitsui Petrochemical Industries, Ltd.) was extruded from an extrusion die into a film having a thickness of 20 μm, and immediately pressed to obtain a film of the present invention. A water-absorbing and oil-absorbing sheet was obtained. The water absorption of the obtained water-absorbent / oil-absorbent sheet is about 210 g / m
2 , and the oil absorption was 50 g / m 2 .
このシートの所定形状に打ち抜き、箱を作成し、内容
物として揚げたてのフライドチキンを収納したところ、
内容物から生じる水蒸気を吸水性樹脂が、また、油分を
吸油性樹脂が吸収し、除去し、内容物の味覚が低下する
ことがなかった。また、板紙には全く水、油が移行せ
ず、箱としての強度が保たれた。After punching this sheet into a predetermined shape, creating a box, and storing freshly fried chicken as a content,
The water-absorbent resin absorbs the water vapor generated from the contents and the oil-absorbent resin absorbs and removes the oil, and the taste of the contents is not reduced. Water and oil did not migrate to the paperboard at all, and the strength of the box was maintained.
＜発明の効果＞ 以上述べたように、本発明の方法によれば、高い吸収
効率を持ち、しかも板紙には吸収した液体が移行するこ
とがなく、従って、シート自体の強度が低下しない吸液
性シートが得られる。このシートを用いることにより、
内容物から生じる液体を吸収しても、容器の強度低下の
ない、優れた吸収性を有する容器を製造することができ
るようになった。<Effects of the Invention> As described above, according to the method of the present invention, the liquid absorbing material has high absorption efficiency, and the absorbed liquid does not transfer to the paperboard, and thus the strength of the sheet itself does not decrease. An opaque sheet is obtained. By using this sheet,
It has become possible to manufacture a container having excellent absorbability without reducing the strength of the container even when absorbing the liquid generated from the contents.
第１図は本発明の方法の一実施例を示す説明図、第２図
は第１図に示す実施例により得られる吸液性シートの断
面図、第３図は本発明の他の方法の実施例を示す説明図
である。 （１）……板紙 （２）……防水層 （３）……吸液性樹脂 （４）……熱接着性樹脂 （５）……通液性シート （９）……押し出しダイ （21）……溶融熱可塑性樹脂FIG. 1 is an explanatory view showing one embodiment of the method of the present invention, FIG. 2 is a cross-sectional view of an absorbent sheet obtained by the embodiment shown in FIG. 1, and FIG. It is explanatory drawing which shows an Example. (1) Paperboard (2) Waterproof layer (3) Liquid absorbent resin (4) Thermal adhesive resin (5) Liquid permeable sheet (9) Extrusion die (21) ...... Molten thermoplastic resin
───────────────────────────────────────────────────── 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 Ｄ２１Ｈ 27/30 Ｄ２１Ｈ 5/00 Ｚ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location D21H 27/30 D21H 5/00 Z
Claims (4)
の、前記防水層上に、吸液性を有する吸液性樹脂粉末を
散布し、次いで、前記吸液性樹脂粉末上に、溶融熱接着
性樹脂を、吸液性樹脂粉末の平均粒子径よりも薄い厚さ
に押し出して吸液性樹脂粉末を被覆し、さらにその上
に、通液性を有し、かつ、前記吸液性樹脂粉末を透過さ
せない通液性シートを、熱接着性樹脂が固化する前に被
せ、圧着して、熱接着性樹脂と通液性シートを積層する
ことを特徴とする、吸液性シートの製造方法。1. A paperboard having a waterproof layer made of a synthetic resin film, wherein a liquid-absorbent resin powder having a liquid-absorbing property is sprayed on the waterproof layer, and then a melt heat is applied on the liquid-absorbent resin powder. The adhesive resin is extruded to a thickness smaller than the average particle diameter of the liquid-absorbent resin powder to cover the liquid-absorbent resin powder, and further has liquid permeability thereon, and the liquid-absorbent resin A method for producing a liquid-absorbent sheet, comprising: covering a liquid-permeable sheet that does not allow powder to pass therethrough before the heat-adhesive resin is solidified, pressing and bonding the heat-adhesive resin and the liquid-permeable sheet. .
ィングして防水層を形成し、防水層が固化した後、防水
層上に、吸液性を有する吸液性樹脂粉末を散布し、次い
で、前記吸液性樹脂粉末上に、溶融熱接着性樹脂を、吸
液性樹脂粉末の平均粒子径よりも薄い厚さに押し出して
吸液性樹脂粉末を被覆し、さらにその上に、通液性を有
し、かつ、前記吸液性樹脂粉末を透過させない通液性シ
ートを、熱接着性樹脂が固化する前に被せ、圧着して、
熱接着性樹脂と通液性シートを積層することを特徴とす
る、吸液性シートの製造方法。2. A waterproof layer is formed by extruding and coating a thermoplastic resin on paperboard, and after the waterproof layer is solidified, a liquid-absorbent resin powder having a liquid-absorbing property is sprayed on the waterproof layer. On the liquid-absorbent resin powder, the molten heat-adhesive resin is extruded to a thickness smaller than the average particle diameter of the liquid-absorbent resin powder to cover the liquid-absorbent resin powder, and further, Having a property, and a liquid-permeable sheet that does not allow the liquid-absorbent resin powder to pass through, before the heat-adhesive resin is solidified, and pressed,
A method for producing a liquid-absorbent sheet, comprising laminating a heat-adhesive resin and a liquid-permeable sheet.
の、前記防水層上に、吸液性樹脂粉末の平均粒子径より
も薄い厚さに溶融熱接着性樹脂を押し出し、次いで吸液
性を有する吸液性樹脂粉末を散布した、通液性を有し、
かつ、前記吸液性樹脂粉末を透過させない通液性シート
を、前記熱接着性樹脂が固化する前に吸液性樹脂粉末が
熱接着性樹脂に接するようにして重ね合わせ、圧着し
て、熱接着性樹脂と通液性シートを積層することを特徴
とする、吸液性シートの製造方法。3. A paperboard having a waterproof layer made of a synthetic resin film, extruding a molten heat-adhesive resin on the waterproof layer to a thickness smaller than the average particle diameter of the liquid-absorbent resin powder. Sprayed liquid-absorbent resin powder having, having liquid permeability,
In addition, the liquid-permeable sheet that does not allow the liquid-absorbent resin powder to permeate is overlapped and pressed together so that the liquid-absorbent resin powder is in contact with the heat-adhesive resin before the heat-adhesive resin is solidified. A method for producing a liquid-absorbent sheet, comprising laminating an adhesive resin and a liquid-permeable sheet.
ィングして防水層を形成し、防水層が固化した後、該防
水層上に、吸液性樹脂粉末の平均粒子径よりも薄い厚さ
に溶融熱接着性樹脂を押し出し、次いで吸液性を有する
吸液性樹脂粉末を散布した、通液性を有し、かつ、前記
吸液性樹脂粉末を透過させない通液性シートを、前記熱
接着性樹脂が固化する前に吸液性樹脂粉末が熱接着性樹
脂に接するようにして重ね合わせ、圧着して、熱接着性
樹脂と通液性シートを積層することを特徴とする、吸液
性シートの製造方法。4. A waterproof layer is formed by extruding a thermoplastic resin onto a paperboard to form a waterproof layer. After the waterproof layer is solidified, a thickness smaller than the average particle diameter of the liquid absorbent resin powder is formed on the waterproof layer. A liquid-permeable sheet having a liquid-permeability, and not allowing the liquid-absorbent resin powder to pass through, is extruded with a molten heat-adhesive resin and then sprayed with a liquid-absorbent resin powder having liquid absorbency. Before the adhesive resin is solidified, the liquid-absorbent resin powder is overlapped so as to be in contact with the heat-adhesive resin, pressed and laminated, and the heat-adhesive resin and the liquid-permeable sheet are laminated. Method for producing a functional sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2339038A JP2569953B2 (en) | 1990-11-30 | 1990-11-30 | Method for producing liquid-absorbent sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2339038A JP2569953B2 (en) | 1990-11-30 | 1990-11-30 | Method for producing liquid-absorbent sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04209899A JPH04209899A (en) | 1992-07-31 |
| JP2569953B2 true JP2569953B2 (en) | 1997-01-08 |
Family
ID=18323685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2339038A Expired - Fee Related JP2569953B2 (en) | 1990-11-30 | 1990-11-30 | Method for producing liquid-absorbent sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2569953B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7078075B1 (en) | 1995-02-23 | 2006-07-18 | H.B. Fuller Licensing & Financing Inc. | Method for producing a continuous thermoplastic coating and articles constructed therefrom |
| DE19753266B4 (en) | 1997-12-01 | 2010-10-07 | H.B. Fuller Licensing & Financing, Inc., St. Paul | Method for connecting airtight materials |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06104355B2 (en) * | 1988-06-28 | 1994-12-21 | 栄和化学工業株式会社 | Water-absorbent food packaging box |
| JPH086080Y2 (en) * | 1988-11-28 | 1996-02-21 | 大日本印刷株式会社 | Water absorbent sheet for food packaging |
-
1990
- 1990-11-30 JP JP2339038A patent/JP2569953B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04209899A (en) | 1992-07-31 |
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