JPH0524141A - Water absorbing sheet - Google Patents
Water absorbing sheetInfo
- Publication number
- JPH0524141A JPH0524141A JP3208411A JP20841191A JPH0524141A JP H0524141 A JPH0524141 A JP H0524141A JP 3208411 A JP3208411 A JP 3208411A JP 20841191 A JP20841191 A JP 20841191A JP H0524141 A JPH0524141 A JP H0524141A
- Authority
- JP
- Japan
- Prior art keywords
- water
- sheet
- absorbent
- water absorbing
- absorbent 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.)
- Withdrawn
Links
Landscapes
- Packages (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は複数枚のシート間に網状
体を介在させることにより吸水性樹脂粉末が各網目ごと
に区画されて挟持された吸水性シートであり、食品用吸
水シートや、保冷材、農園芸用、土木建築用、さらには
工業用等の分野に広く利用される吸水性シートに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-absorbent sheet in which a water-absorbent resin powder is divided and sandwiched by each mesh by interposing a mesh-like body between a plurality of sheets. The present invention relates to a water absorbent sheet that is widely used in the fields of cold insulation, agricultural and horticultural use, civil engineering and construction, and industrial use.
【０００２】[0002]
【従来の技術】吸水性樹脂粉末をシート状にする手段と
しては、該粉末を複数枚の薄葉吸水紙等ではさみ、エン
ボスロールで圧着し固定する方法が一般的に採用されて
いるが、該吸水性樹脂粉末は吸水後に薄葉吸水紙から剥
離してしまうことが多く、形状安定性に問題があった。
この欠点を改善するために、例えば特公平 2−61380 号
公報には通気性封入部と不通気性かつ熱圧着性接着部を
設けた基材上に吸水性樹脂粉末を散布、吸引し、その後
熱圧着することにより該粉末を任意の形状に区画して封
入する方法が開示されている。2. Description of the Related Art As a means for forming a water-absorbent resin powder into a sheet, a method of sandwiching the powder with a plurality of thin water-absorbent papers and press-bonding it with an embossing roll is generally adopted. The water-absorbent resin powder often peels off from the thin water-absorbent paper after absorbing water, which causes a problem in shape stability.
In order to improve this drawback, for example, in Japanese Patent Publication No. 2-61380, a water-absorbent resin powder is sprinkled and sucked on a substrate provided with a gas-permeable encapsulation part and an air-impermeable and thermocompression-bonding adhesive part. A method of partitioning the powder into an arbitrary shape and enclosing it by thermocompression bonding is disclosed.
【０００３】しかし、吸水性樹脂の特性として、吸水前
の樹脂粉末と吸水後のゲルとの体積・重量に大きな隔た
りが生じるので、吸水性樹脂粉末をシート状物で挟持す
る場合、「ふくれしろ」が必要となってくる。このため
熱融着性不織布によって圧着し挟持する方法や、不織布
を接着部でくっつける等の一般的な挟持方法ではなかな
かふくれしろの確保ができず、吸水後の樹脂の重量制限
の必要性から、封入する吸水性樹脂粉末の散布量を少な
くせざるを得ないというのが現状であった。However, as a characteristic of the water-absorbent resin, there is a large difference in volume and weight between the resin powder before water absorption and the gel after water absorption, so that when the water-absorbent resin powder is sandwiched by sheet-like materials, "blister Will be needed. For this reason, it is difficult to secure the blistering margin by a method of crimping and sandwiching with a heat-fusible non-woven fabric, or a general sandwiching method such as sticking the non-woven fabric at the adhesive portion, and it is necessary to limit the weight of the resin after water absorption The current situation is that the amount of water-absorbent resin powder to be encapsulated must be reduced.
【０００４】一方、特開昭63−141181号公報には多数の
袋状空間部に吸水性樹脂を封入した包装シートが開示さ
れている。この発明においては、ある程度のふくれしろ
の必要性が言及されているが、袋状空間部は１つ１つ独
立しているため自由度が全くなく、水が１か所に集中し
た場合は吸水しきれなくなるといった欠点を有してい
た。On the other hand, Japanese Patent Laid-Open No. 63-141181 discloses a packaging sheet in which a large number of bag-shaped spaces are filled with a water absorbent resin. In this invention, it is mentioned that a certain amount of swelling is necessary, but since each bag-shaped space is independent, there is no degree of freedom, and when water is concentrated in one place, it absorbs water. It had a drawback that it could not be filled.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、吸水
性樹脂の水膨潤時にも充分余裕のあるふくれしろを有
し、吸水性シートの強度および形状安定性を簡単に変更
できる吸水性シートを提供することにある。DISCLOSURE OF THE INVENTION An object of the present invention is to provide a water absorbent sheet having a swelling margin with a sufficient margin even when the water absorbent resin is swollen in water and capable of easily changing the strength and shape stability of the water absorbent sheet. To provide.
【０００６】[0006]
【課題を解決するための手段】本発明者等は上記目的を
達成するために鋭意検討した結果、形状や性能の異なっ
たものが簡単に選択できる網状体をシート状物で挟持す
ることによって、吸水性シートに種々の特徴を付与でき
ることを明らかにし、本発明に到った。すなわち本発明
は、吸水性シートが、少なくとも片側の表面に透水性シ
ートを配設してなる複数枚シートの積層体であって、各
隣接シートの間には吸水性樹脂粉末および網状体を介在
させて一体化したものであることを要旨とするものであ
る。Means for Solving the Problems As a result of intensive studies conducted by the present inventors in order to achieve the above-mentioned object, by sandwiching a mesh-like body with sheet-like materials, which can be easily selected from those having different shapes and performances, It has been clarified that various characteristics can be given to the water absorbent sheet, and the present invention has been completed. That is, the present invention is a water-absorbent sheet, which is a laminate of a plurality of sheets in which a water-permeable sheet is disposed on at least one surface, and a water-absorbent resin powder and a mesh are interposed between adjacent sheets. The main point is that they are integrated.
【０００７】[0007]
【作用】本発明に用いられる透水性シートとしては、例
えば、薄葉紙、クレープ紙、和紙等の紙素材のものや、
任意の素材からなる不織布、織物、編物、あるいは有孔
性フィルム等の公知の透水性材料が挙げられ、用途に応
じて適宜選択される。The water-permeable sheet used in the present invention includes, for example, paper materials such as thin paper, crepe paper, Japanese paper, and the like.
A known water-permeable material such as a non-woven fabric, a woven fabric, a knitted fabric, or a porous film made of any material can be used, and is appropriately selected according to the application.
【０００８】本発明における網状体としては、公知の熱
可塑性樹脂、例えば、ポリエチレン、ポリプロピレン、
ポリエステル、ポリアミド等からなる熱融着性繊維もし
くは線材を少なくとも一部含有する網状体、あるいは熱
融着性物質でコーティングされたかまたは接着剤を付与
された任意の素材の網状体が挙げられる。本発明による
吸水性シートは、網状体を変えることによって用途に応
じて吸水性シートの特性を自在に変化させることが可能
である。例えば吸水性シートに強度を付与する時は、熱
融着性線材からなる網状体では線材を太くすればよく、
コーティングタイプでは網状体の素材として金属等を選
択すればよい。また該吸水性シートにおいて軽量化が重
要視される場合には細い繊維状の網を選択すればよい。As the reticulate body in the present invention, a known thermoplastic resin such as polyethylene, polypropylene,
Examples thereof include a net-like body containing at least a part of the heat-fusible fiber or wire made of polyester, polyamide, or the like, or a net-like body of any material coated with a heat-fusible substance or provided with an adhesive. In the water absorbent sheet according to the present invention, the characteristics of the water absorbent sheet can be freely changed according to the application by changing the mesh. For example, when imparting strength to the water absorbent sheet, the wire rod may be thickened in the reticulated body made of the heat-fusible wire rod,
In the coating type, a metal or the like may be selected as the material of the mesh body. If weight reduction is important in the water absorbent sheet, a fine fibrous net may be selected.
【０００９】吸水性樹脂が封入される区画部の大きさや
形状は、網状体の目開きおよび網糸の太さ等を様々に変
化させることによって自在に変化させることができ、吸
水性樹脂の封入量も区画の大きさに応じて種々選択が可
能である。また、例えば、経糸と緯糸との交点を若干隆
起させた網状体を用いれば、交点でのみ接着した積層シ
ートを得ることができる。もちろんシートの周囲は別途
線接着にして吸水性樹脂粉末の飛散を防ぐことができ
る。The size and shape of the partition in which the water-absorbent resin is enclosed can be freely changed by variously changing the openings of the mesh body and the thickness of the mesh thread, and the water-absorbent resin is enclosed. The amount can be variously selected according to the size of the section. Further, for example, by using a net-like body in which the intersections of the warp yarns and the weft yarns are slightly raised, it is possible to obtain a laminated sheet bonded only at the intersections. Of course, the periphery of the sheet can be separately line-bonded to prevent the water-absorbent resin powder from scattering.
【００１０】本発明において用いられる吸水性樹脂粉末
としては、公知の架橋されたタイプの（メタ）アクリル
酸系、（メタ）アクリル酸塩、（メタ）アクリルアミド
系、ビニルアルコール系、無水マレイン酸系等の共重合
体；（メタ）アクリルアミド−（メタ）アクリル酸塩共
重合体、スルホン酸基含有（メタ）アクリル酸塩共重合
体、イソブチレン−無水マレイン酸共重合体、酢酸ビニ
ル−アクリル酸エステル共重合体等の共重合体；デンプ
ン−アクリル酸塩グラフト重合体等のグラフト重合体の
他、セルロース系材料等の吸水性高分子材料によるもの
が例示される。The water-absorbent resin powder used in the present invention is a known crosslinked type (meth) acrylic acid type, (meth) acrylic acid salt, (meth) acrylamide type, vinyl alcohol type, maleic anhydride type. Copolymers such as; (meth) acrylamide- (meth) acrylic acid salt copolymer, sulfonic acid group-containing (meth) acrylic acid salt copolymer, isobutylene-maleic anhydride copolymer, vinyl acetate-acrylic acid ester Examples thereof include copolymers such as copolymers; graft polymers such as starch-acrylate graft polymers, and water-absorbing polymer materials such as cellulosic materials.
【００１１】本発明における吸水性シートの構成は、
２枚の透水性シートの間に吸水性樹脂粉末と網状体を介
在させたもの、片側が透水性シートでもう一方は不透
水性シートである２層間に吸水性樹脂粉末と網状体を介
在させたもの、これらの吸水性シートの片側もしくは
両側にさらに該樹脂粉末と網状体を介在させて透水性の
積層数を増したもの等が挙げられ、透水性シート、吸水
性樹脂、網状体、積層数は用途に応じて適宜組み合わせ
て用いることができる。なお、不透水性シートの素材と
しては特に限定されないが、ポリエチレン、ポリプロピ
レン、ポリ塩化ビニル等のフィルムやアルミ箔等が用い
られる。The structure of the water absorbent sheet in the present invention is as follows.
A water-absorbent resin powder and a reticulate body interposed between two water-permeable sheets, a water-permeable sheet on one side and a water-impermeable sheet on the other side. The water-absorbent sheet, the water-absorbent resin, the net-like body, the laminated body, and the like in which the resin powder and the net-like body are further interposed on one side or both sides of the water-absorbent sheet to increase the number of laminated layers. The numbers can be appropriately combined and used according to the application. The material of the water-impermeable sheet is not particularly limited, but a film of polyethylene, polypropylene, polyvinyl chloride or the like, an aluminum foil or the like is used.
【００１２】次に本発明による吸水性シートを図面に基
づいて説明するが、本発明はこれらの図面に限定される
ものではなく、前後の趣旨を逸脱することなく変更する
ことは本発明の技術的範囲に含まれる。Next, the water-absorbent sheet according to the present invention will be explained based on the drawings, but the present invention is not limited to these drawings, and it is a technique of the present invention to change without departing from the spirit of the invention. It is included in the target range.
【００１３】図１は本発明による吸水性シートの一実施
例の平面図である。吸水性シート１は、透水性シート２
と不透水性シート３の間に、網状体４および網状体４に
よって区画された吸水性樹脂５を介在させて構成され
る。前記の説明でも述べたように、本発明の吸水性シー
トにおいては、図１中の不透水性シート３が透水性シー
トであってもよく、また積層数がさらに多いものであっ
てもよい。FIG. 1 is a plan view of an embodiment of a water absorbent sheet according to the present invention. The water absorbent sheet 1 is the water permeable sheet 2
And the water-impermeable sheet 3 between the water-impermeable sheet 3 and the impermeable sheet 3. As described in the above description, in the water absorbent sheet of the present invention, the water impermeable sheet 3 in FIG. 1 may be a water permeable sheet, or may have a larger number of laminated layers.
【００１４】図２は吸水性シートの断面図である。吸水
性シート１の網状体４は網目の交点６が隆起しており、
この交点６で透水性シート２および不透水性シート３と
網状体が接着している。網状体の交点６の高さＨを変え
ることによって、吸水性樹脂５が封入される部分の大き
さを変えることができ、用途に応じて吸水性樹脂量を増
す場合にも簡単に対応することができる。また、網状体
４として交点が隆起していないフラットなものを使用す
れば、該網状体と透水性あるいは不透水性シートとが線
接着するため吸水性樹脂を完全に区画して封入すること
ができる。FIG. 2 is a sectional view of the water absorbent sheet. In the mesh body 4 of the water absorbent sheet 1, the intersection points 6 of the mesh are raised,
At this intersection point 6, the water-permeable sheet 2 and the water-impermeable sheet 3 are bonded to the mesh body. By changing the height H of the intersection points 6 of the mesh body, the size of the portion where the water absorbent resin 5 is enclosed can be changed, and it is possible to easily cope with the case where the amount of the water absorbent resin is increased according to the application. You can Further, if a flat material having no raised intersection is used as the mesh body 4, since the mesh body and the water-permeable or water-impermeable sheet are line-bonded to each other, the water-absorbent resin can be completely divided and enclosed. it can.
【００１５】本発明の吸水性シートは脱水を目的とする
場合はもちろん、あらかじめ水を吸水させておいて乾燥
防止等の保水目的に利用することもでき、さらに吸水さ
せた後に該吸水性シートを凍らせることにより保冷目的
にも利用できる。吸水性樹脂の他に脱臭剤、抗菌剤、防
黴剤等の機能を有する公知の物質を封入することもでき
る。The water-absorbent sheet of the present invention can be used not only for the purpose of dehydration but also for the purpose of retaining water such as prevention of drying by absorbing water in advance. It can also be used for cold storage by freezing. In addition to the water absorbent resin, a known substance having a function such as a deodorant, an antibacterial agent, an antifungal agent or the like can be enclosed.
【００１６】用途としては、例えば結露防止材、食品用
鮮度保持吸水シート、保冷材、調湿材、農園芸用保水
材、工業用脱水材、医療用吸液材等が挙げられる。本発
明の吸水性シートは網状体の形状・素材を変えるだけ
で、どの用途においても適した形状の吸水性部材を提供
することができる。変形可能な可撓性の網状体（例えば
金属に熱融着性物質をコーティングしたもの）を利用す
れば、箱形やＬ字形等の吸水性部材を簡単に作成するこ
とができる。Examples of applications include dew condensation prevention materials, food freshness-maintaining water absorbent sheets, cold insulation materials, humidity control materials, agricultural and horticultural water retention materials, industrial dehydration materials, and medical liquid absorbent materials. The water-absorbent sheet of the present invention can provide a water-absorbent member having a shape suitable for any application only by changing the shape and material of the mesh body. If a deformable and flexible mesh body (for example, a metal coated with a heat-fusible substance) is used, a box-shaped or L-shaped water-absorbing member can be easily manufactured.
【００１７】[0017]
【実施例】以下に実施例を挙げて本発明をより具体的に
説明するが、本発明はこれらに限定されるものではな
い。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.
【００１８】実施例１ 坪量20g/m2の薄葉紙の上にポリプロピレン製の網状体を
おき、吸水性樹脂粉末（株式会社日本触媒製、アクアリ
ックＣＡ）30g/m2を均一に散布し、もう一枚の薄葉紙を
かぶせた後、 170℃の熱ロールを通すことによって加熱
融着し一体化された吸水性シートを作成した。[0018] Place a polypropylene mesh body on the thin paper of Example 1 basis weight 20 g / m 2, the water-absorbent resin powder (manufactured by Nippon Shokubai Co., Ltd., AQUALIC CA) was uniformly sprayed 30 g / m 2, After covering another sheet of thin paper, it was heat-fused by passing through a 170 ° C hot roll to form an integrated water-absorbent sheet.
【００１９】実施例２ 坪量30g/m2のクレープ紙と厚み25μｍのポリエステル系
フィルムの間に、アクアリックＣＡを40g/m2と、ポリエ
ステル系繊維の表層部に熱溶融性のポリエチレンがコー
ティングされた網状体をはさみ込み、 180℃の熱ロール
を通して加熱融着し吸水性シートを作成した。 Example 2 40 g / m 2 of Aquaric CA was coated between a crepe paper having a basis weight of 30 g / m 2 and a polyester film having a thickness of 25 μm, and the surface layer of polyester fiber was coated with heat-meltable polyethylene. The reticulated body was sandwiched and heat-fused through a 180 ° C. heat roll to prepare a water-absorbent sheet.
【００２０】実施例３ 坪量 220g/m2の段ボール板紙と坪量25g/m2のポリエステ
ル系不織布を用いて実施例２と同様にして吸水性シート
を作成した。[0020] creating the absorbent sheet in the same manner as in Example 2 with Example 3 a basis weight of 220 g / m 2 of corrugated paperboard and basis weight 25 g / m 2 of polyester non-woven fabric.
【００２１】実施例４ ２枚の坪量30g/m2のポリエステル系不織布を用いて実施
例２と同様にして吸水性シートを作成した。 Example 4 A water absorbent sheet was prepared in the same manner as in Example 2 by using two polyester nonwoven fabrics having a basis weight of 30 g / m 2 .
【００２２】実施例５ 坪量20g/m2のレーヨン系不織布と坪量50g/m2のアクリル
系編物の間にアクアリックＣＡ（20g/m2）と接着剤を塗
布したポリエステル系撚糸製の網状体をはさみ込み圧着
して一体化し、吸水性シートを作成した。[0022] Example 5 basis weight 20 g / m 2 rayon nonwoven fabric and basis weight 50 g / m 2 of acrylic Aqualic CA during knitting (20g / m 2) and the adhesive was applied was polyester twisted yarn made of The net-like body was sandwiched and pressure-bonded to be integrated to prepare a water-absorbent sheet.
【００２３】実施例６ 坪量25g/m2のレーヨン系不織布と厚さ20μｍのナイロン
系フィルムを用いて実施例１と同様にして吸水性シート
を作成した。 Example 6 A water-absorbent sheet was prepared in the same manner as in Example 1, using rayon-based nonwoven fabric having a basis weight of 25 g / m 2 and nylon film having a thickness of 20 μm.
【００２４】実施例７ 坪量40g/m2の和紙上にポリプロピレン製網状体をおき、
アクアリックＣＡ（30g/m2）を均一に散布した後、坪量
20g/m2のポリエステル系不織布をかぶせた。さらにこの
不織布の上に、上記の網とアクアリックＣＡ（30g/m2）
をおき前記の和紙をかぶせた後、実施例１と同様にして
５層構造の吸水性シートを作成した。 Example 7 A polypropylene mesh was placed on Japanese paper having a basis weight of 40 g / m 2 ,
After spraying Aquaric CA (30g / m 2 ) uniformly, weigh
A 20 g / m 2 polyester non-woven fabric was covered. Furthermore, on this non-woven fabric, the above net and Aquaric CA (30 g / m 2 )
After covering with the above-mentioned Japanese paper, a water-absorbent sheet having a 5-layer structure was prepared in the same manner as in Example 1.
【００２５】比較例 実施例１と同じ薄葉紙２枚の間にアクアリックＣＡ（30
g/m2）を均一に散布し、エンボスロールで圧着すること
によって一体化された吸水性シートを得た。 Comparative Example Between two sheets of the same thin paper as in Example 1, Aqualic CA (30
g / m 2 ) was evenly sprayed and pressure-bonded with an embossing roll to obtain an integrated water-absorbent sheet.
【００２６】＜剥離性試験＞実施例１〜７および比較例
で得られた吸水性シートを 100mm×200mm に切断し別々
にポリプロピレン製トレイに入れて水道水を吸水させ
た。１０分経過後に吸水したシートの網状体の接着状態
を観察し、表１に示した。<Peelability Test> The water-absorbent sheets obtained in Examples 1 to 7 and Comparative Example were cut into 100 mm × 200 mm pieces and placed separately in polypropylene trays to absorb tap water. After 10 minutes, the adhering state of the net-like body of the water-absorbed sheet was observed and shown in Table 1.
【００２７】[0027]
【表１】 [Table 1]
【００２８】[0028]
【発明の効果】本発明の吸水性シートは形状や性能を簡
単に変化させることができる網状体をシート間に挟持し
ているので、吸水性シートの強度を簡単に変更でき、し
かも形状安定性に優れ、吸水性樹脂が膨潤しても充分余
裕のあるふくれしろを有している吸水性シートを提供す
ることができた。The water-absorbent sheet of the present invention has a mesh-like member sandwiched between the sheets, the shape and performance of which can be easily changed, so that the strength of the water-absorbent sheet can be easily changed and the shape stability can be improved. It was possible to provide a water absorbent sheet which is excellent in swelling and has a sufficient amount of swelling even if the water absorbent resin swells.
【図１】本発明による吸水シートの平面図である。FIG. 1 is a plan view of a water absorbent sheet according to the present invention.
【図２】本発明による吸水シートの断面図である。FIG. 2 is a sectional view of a water absorbing sheet according to the present invention.
１ 吸水シート ２ 透水性シート ３ 不透水性シート ４ 網状体 ５ 吸水性樹脂 ６ 網目の交点 1 Water-absorbent sheet 2 Water-permeable sheet 3 Water-impermeable sheet 4 Reticulated body 5 Water-absorbent resin 6 Intersection points of mesh
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ６５Ｄ 81/26 Ｈ 7191−3Ｅ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location B65D 81/26 H 7191-3E
Claims (1)
配設してなる複数枚シートの積層体であって、各隣接シ
ートの間には吸水性樹脂粉末および網状体を介在させて
一体化したものであることを特徴とする吸水性シート。Claim: What is claimed is: 1. A laminate of a plurality of sheets in which a water-permeable sheet is disposed on at least one surface, and water-absorbent resin powder and a mesh are provided between adjacent sheets. A water-absorbent sheet characterized by being integrated by being interposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3208411A JPH0524141A (en) | 1991-07-24 | 1991-07-24 | Water absorbing sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3208411A JPH0524141A (en) | 1991-07-24 | 1991-07-24 | Water absorbing sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0524141A true JPH0524141A (en) | 1993-02-02 |
Family
ID=16555798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3208411A Withdrawn JPH0524141A (en) | 1991-07-24 | 1991-07-24 | Water absorbing sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0524141A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0986569A (en) * | 1995-09-26 | 1997-03-31 | Teremaa Japan:Kk | Tray mat |
-
1991
- 1991-07-24 JP JP3208411A patent/JPH0524141A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0986569A (en) * | 1995-09-26 | 1997-03-31 | Teremaa Japan:Kk | Tray mat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981008 |