JPH11275959A - Nonwoven fabric for raising seedling of rice - Google Patents
Nonwoven fabric for raising seedling of riceInfo
- Publication number
- JPH11275959A JPH11275959A JP10100374A JP10037498A JPH11275959A JP H11275959 A JPH11275959 A JP H11275959A JP 10100374 A JP10100374 A JP 10100374A JP 10037498 A JP10037498 A JP 10037498A JP H11275959 A JPH11275959 A JP H11275959A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- area
- seedling
- seedlings
- fiber
- 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.)
- Granted
Links
Landscapes
- Cultivation Of Plants (AREA)
- Pretreatment Of Seeds And Plants (AREA)
- Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
- Biological Depolymerization Polymers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水耕栽培で又は非
水耕栽培で、稲苗を生育させるときに用いる育苗用不織
布に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-woven fabric for raising seedlings used for growing rice seedlings in hydroponic or non-hydroponic cultivation.
【０００２】[0002]
【従来の技術】古くから、稲作は、育苗箱に敷設した土
壌（苗代）に種籾を播種して覆土し、次いで、育苗を終
えた苗を、梅雨の頃に田に植え代えるという手順で行わ
れている。苗代で生育した苗は、土付き苗となってお
り、非常に重く、田に植え代える際の搬送に人手や手間
がかかるということがあった。2. Description of the Related Art Rice cultivation has long been practiced in such a manner that seeds are sown on soil (seedlings) laid in a nursery box to cover the soil, and then the seedlings that have been raised are replaced by rice in the rainy season. Have been done. Seedlings that grew in the nursery allowance are soil-bearing seedlings, which are very heavy, and require time and labor to transport when replanting in rice fields.
【０００３】このため、近年、育苗箱を使用しない育苗
方法が提案されている。例えば、水槽の底面に長尺の不
織布（当業界では「ロングマット」と称呼されてい
る。）を敷設し、不織布上に種籾を播種するという方
法、或いは土壌の上に不織布を敷設し、この不織布上に
種籾を播種するという方法が提案されている。これらの
方法によれば、不織布上で苗が生育し、不織布付き苗と
なるため、土付き苗に比べて、重量が軽く、田に植え代
える際の搬送が楽になるという利点がある。なお、不織
布付き苗は長尺物となっているため、巻回してロール状
とし、これを田植機に載せて、所定の寸法に破断しなが
ら、田に苗を移植するのである。[0003] For this reason, a seedling raising method that does not use a seedling box has recently been proposed. For example, a long nonwoven fabric (called "long mat" in the art) is laid on the bottom of the water tank, and a method of sowing seeds on the nonwoven fabric, or laying the nonwoven fabric on the soil, A method of sowing seed rice on a nonwoven fabric has been proposed. According to these methods, the seedling grows on the nonwoven fabric and becomes a seedling with a nonwoven fabric. Therefore, there is an advantage that the seedlings are lighter in weight than the soiled seedlings and can be easily transported when transplanting to a field. In addition, since the seedling with a nonwoven fabric is a long object, it is wound into a roll, and is placed on a rice transplanter, and the seedling is transplanted to a rice field while being broken to a predetermined size.
【０００４】しかし、これらの方法を採用した場合、以
下のような技術的問題点が指摘されている。（ｉ）種籾
を播種した後に覆土しないため、育苗時に根上がりが生
じる。即ち、不織布中又は不織布の裏面に根が張らず
に、不織布表面に根が持ち上がった状態になる。従っ
て、田植機によって不織布付き苗を掻き取りながら（即
ち、不織布を裁断しながら）、移植する際に苗を傷めて
しまうということがある。（ii）田植機によって苗を掻
き取る際、不織布も一緒に破断されるが、不織布が田植
機の掻き取りによって破断されない場合があり、移植作
業が連続して行えないということがある。However, when these methods are adopted, the following technical problems have been pointed out. (I) Since the seedlings are not covered after being sown, roots rise during seedling raising. That is, the roots are lifted on the surface of the non-woven fabric without being rooted in the non-woven fabric or on the back surface of the non-woven fabric. Therefore, the seedling may be damaged when transplanting it while scraping the seedling with the nonwoven fabric by the rice transplanter (that is, cutting the nonwoven fabric). (Ii) When the seedling is scraped off by the rice transplanter, the nonwoven fabric is also broken at the same time. However, the nonwoven fabric may not be broken by the scraping of the rice transplanter, and the transplanting operation may not be performed continuously.
【０００５】上記した（ｉ）の問題点を解決するために
は、不織布として、構成繊維相互間の間隙の大きい粗目
のものを採用すれば良いと考えられる。このような不織
布であれば、構成繊維相互間の間隙に根が侵入し、不織
布中又は不織布裏面に根が張ると考えられるからであ
る。しかしながら、構成繊維相互間の間隙が大きいと、
不織布自体の形態安定性が低下する。従って、不織布付
き苗をロール状に巻回しにくくなったり、或いは巻回で
きたとしても田植機に載せる際に、その形態が崩れたり
して、田植機による移植作業が行いにくいという憾みが
あった。また、（ii）の問題点を解決するためには、不
織布として引張強力の弱いものを採用すれば良いと考え
られる。しかし、引張強力の弱いものは、一般的に不織
布自体の形態安定性にも劣り、前記したように、田植機
による移植作業が行いにくいということになる。[0005] In order to solve the above-mentioned problem (i), it is considered that a nonwoven fabric having a coarse texture having a large gap between constituent fibers may be used. This is because, in the case of such a nonwoven fabric, it is considered that the root penetrates into the gap between the constituent fibers, and the root is formed in the nonwoven fabric or on the back surface of the nonwoven fabric. However, if the gap between the constituent fibers is large,
The form stability of the nonwoven fabric itself is reduced. Therefore, there is a regret that it is difficult to wind the seedling with a nonwoven fabric in a roll shape, or even if the seedling can be wound, when placed on a rice transplanter, its form is collapsed and transplantation work by the rice transplanter is difficult. . In order to solve the problem (ii), it is considered that a nonwoven fabric having a low tensile strength may be used. However, those having low tensile strength generally have poor morphological stability of the nonwoven fabric itself, and as described above, it is difficult to carry out transplantation by a rice transplanter.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、上記した問
題点（ｉ）及び（ii）を一挙に解決することを課題とす
るものである。本発明は、不織布の構造として、多数の
開孔区域と、繊維が密集すると共に絡み合った連続区域
とを設け、開孔区域の存在によって根上がりを防止し、
連続区域の存在によって、不織布自体の形態安定性を維
持しようというものである。SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems (i) and (ii) at once. The present invention provides, as the structure of the nonwoven fabric, a large number of open areas, and a continuous area in which fibers are densely entangled with each other, and the roots are prevented from rising by the presence of the open areas,
The existence of the continuous area is intended to maintain the morphological stability of the nonwoven fabric itself.
【０００７】。[0007]
【課題を解決するための手段】即ち、本発明は、生分解
性繊維相互が密集すると共に絡み合ってなる連続区域
と、該連続区域に囲まれて孤立して存在する多数の開孔
区域とよりなる稲の育苗用不織布であって、該開孔区域
の一個の面積は３〜２５ｍｍ2であると共に、該育苗用
不織布中における全開孔区域の面積の割合は３０〜７０
％であり、更に該育苗用不織布の長手方向及び幅方向の
引張強力の和は１〜５ｋｇ／５ｃｍ幅であり、且つ該育
苗用不織布の幅方向の引裂強力は８００ｇ以下であるこ
とを特徴とする稲の育苗用不織布に関するものである。
また、連続区域と開孔区域とを持つ稲の育苗用不織布の
製造方法に関するものである。That is, the present invention is directed to a continuous area in which biodegradable fibers are densely entangled with each other, and a large number of isolated open areas surrounded by the continuous area. A non-woven fabric for raising rice seedling, wherein the area of one of the open areas is 3 to 25 mm 2 , and the ratio of the area of the whole open area to the non-woven cloth for growing seedling is 30 to 70.
%, The sum of the tensile strengths in the longitudinal direction and the width direction of the seedling-raising nonwoven fabric is 1 to 5 kg / 5 cm in width, and the tear strength in the width direction of the seedling-raising nonwoven fabric is 800 g or less. The present invention relates to a nonwoven fabric for raising rice seedlings.
The present invention also relates to a method for producing a nonwoven fabric for raising rice seedlings having a continuous area and an open area.
【０００８】本発明で用いられる生分解性繊維として
は、木綿（コットン），レーヨン短繊維又は長繊維、ポ
リ乳酸系短繊維又は長繊維、脂肪族ポリエステル系短繊
維又は長繊維等の従来公知の生分解性繊維が用いられ
る。生分解性繊維を使用する理由は、田植後の土壌中に
おいて、稲の生育と共に崩壊させるためである。本発明
においては、生分解性繊維として、木綿，レーヨン短繊
維，ポリ乳酸系短繊維，脂肪族ポリエステル系短繊維等
の短繊維を用いるのが好ましい。これは、田植機によっ
て苗を掻き取る際、生分解性繊維で構成された育苗用不
織布を破断させやすくするためである。短繊維の繊維長
は、従来用いられている程度で良く、例えば、５〜１０
０ｍｍ程度で良い。The biodegradable fibers used in the present invention include conventionally known biodegradable fibers such as cotton (cotton), rayon short fibers or long fibers, polylactic acid short fibers or long fibers, and aliphatic polyester short fibers or long fibers. Biodegradable fibers are used. The reason for using the biodegradable fiber is to disintegrate it with the growth of rice in the soil after rice planting. In the present invention, it is preferable to use short fibers such as cotton, rayon short fibers, polylactic acid short fibers, and aliphatic polyester short fibers as the biodegradable fibers. This is because when the rice seedling is scraped off by the rice transplanter, the nonwoven fabric for growing seedlings composed of biodegradable fibers is easily broken. The fiber length of the short fiber may be a conventionally used length, for example, 5 to 10
It may be about 0 mm.
【０００９】本発明に係る稲の育苗用不織布には、この
生分解性繊維が密集していると共に、生分解性繊維相互
が絡み合っている連続区域が存在する（図１中の白色区
域）。この連続区域の存在によって、育苗用不織布にあ
る程度の形態安定性と引張強力が与えられる。生分解性
繊維として、ポリ乳酸系繊維や脂肪族ポリエステル系繊
維等の熱可塑性生分解性繊維を使用した場合には、熱及
び所望により圧力を与えて、この連続区域に存在する生
分解性繊維相互間を熱融着しても良い。このような熱融
着によって、育苗用不織布の形態安定性及び引張強力が
更に向上する。The nonwoven fabric for raising rice seedlings according to the present invention has a continuous area where the biodegradable fibers are dense and the biodegradable fibers are intertwined with each other (white area in FIG. 1). The presence of this continuous zone gives the seedling raising nonwoven fabric some form stability and tensile strength. When a thermoplastic biodegradable fiber such as a polylactic acid-based fiber or an aliphatic polyester-based fiber is used as the biodegradable fiber, heat and, if desired, pressure are applied to the biodegradable fiber existing in this continuous area. Thermal fusion may be performed between them. By such heat sealing, the morphological stability and tensile strength of the non-woven fabric for raising seedlings are further improved.
【００１０】本発明に係る育苗用不織布には、連続区域
に囲まれている開孔区域が存在する（図１中の黒色区
域）。この開孔区域は、各々孤立して存在している。一
個一個の開孔区域の面積は３〜２５ｍｍ2である。開孔
区域の面積が３ｍｍ2未満であると、苗の根が育苗用不
織布の裏面に張りにくくなり、根上がりする恐れがある
ので好ましくない。一方、開孔区域の面積が２５ｍｍ2
を超えると、育苗用不織布の形態安定性が低下し、不織
布付き苗をロール状に巻回しにくくなったり、或いは不
織布付き苗を田植機に載せにくくなるので、好ましくな
い。ここで、開孔区域の面積は、以下の如き方法で測定
されるものである。即ち、万能投影器（日本光学株式会
社製：型式 ＰＲＯＪＥＣＴＯＲ Ｖ−１２）を用い、
５０個の開孔区域の縦方向ａ及び横方向ｂの長さをｍｍ
単位で小数点以下２桁まで測定し、５０個の開孔区域の
各々についてａ×ｂを算出し、これの平均値を開孔区域
の面積（ｍｍ2）とした。なお、開孔区域内に少量の繊
維が存在する場合であっても、それは存在しないものと
して測定した。The nonwoven fabric for raising seedling according to the present invention has an open area surrounded by a continuous area (black area in FIG. 1). The aperture areas are each present in isolation. The area of each open area is 3 to 25 mm 2 . If the area of the opening area is less than 3 mm 2 , the roots of the seedlings are difficult to stick to the back surface of the nonwoven fabric for raising seedlings, and the roots may rise. On the other hand, the area of the opening area is 25 mm 2
If the number exceeds, the morphological stability of the nonwoven fabric for raising seedlings decreases, and it becomes difficult to wind the seedling with the nonwoven fabric in a roll shape, or it becomes difficult to place the seedling with the nonwoven fabric on a rice transplanter, which is not preferable. Here, the area of the opening area is measured by the following method. That is, using a universal projector (produced by Nippon Kogaku Co., Ltd .: model PROJECTOR V-12),
The length of the vertical direction a and the horizontal direction b of the 50 opening areas is mm
The measurement was made to two decimal places in units, and a × b was calculated for each of the 50 aperture areas, and the average value was defined as the area (mm 2 ) of the aperture area. In addition, even when a small amount of fiber was present in the opening area, the measurement was made on the assumption that it was not present.
【００１１】また、育苗用不織布中における全開孔区域
の面積の割合は３０〜７０％である。全開孔区域の面積
が３０％未満になると、苗の根が侵入する箇所が少なく
なり、根が育苗用不織布の裏面に張りにくくなり、根上
がりする恐れがあるので好ましくない。一方、全開孔区
域の面積が７０％を超えると、相対的に連続区域が少な
くなり、育苗用不織布の形態安定性が低下し、不織布付
き苗をロール状に巻回しにくくなったり、或いは不織布
付き苗を田植機に載せにくくなるので、好ましくない。
ここで、育苗用不織布中における全開孔区域の面積の割
合は、以下の如き方法で測定されるものである。即ち、
万能投影器（日本光学株式会社製：型式ＰＲＯＪＥＣＴ
ＯＲ Ｖ−１２）を用い、４ｃｍ2中の開孔区域の数
を、１０ケ所に亘り数え、その平均値より配設密度（個
／ｃｍ2）を求めた。そして、（育苗用不織布中におけ
る全開孔区域の面積の割合：％）＝（開孔区域の面積：
ｍｍ2）×（配設密度：個／ｃｍ2）なる式で、育苗用不
織布中における全開孔区域の面積の割合を算出した。The ratio of the area of the fully open area in the nonwoven fabric for raising seedlings is 30 to 70%. If the area of the fully open area is less than 30%, the number of places where the roots of the seedlings invade is reduced, and the roots are difficult to stick to the back surface of the non-woven fabric for raising seedlings. On the other hand, if the area of the fully open area exceeds 70%, the continuous area is relatively reduced, and the morphological stability of the seedling-raising nonwoven fabric is reduced. It is not preferable because the seedlings are difficult to put on the rice transplanter.
Here, the ratio of the area of the fully opened area in the nonwoven fabric for raising seedlings is measured by the following method. That is,
Universal projector (produced by Nippon Kogaku Co., Ltd .: Model PROJECT
Using OR V-12), the number of open areas in 4 cm 2 was counted at 10 places, and the arrangement density (pieces / cm 2 ) was determined from the average value. Then, (Ratio of the area of the fully opened area in the nonwoven fabric for raising seedlings:%) = (Area of the opened area:
mm 2 ) × (arrangement density: pieces / cm 2 ), the ratio of the area of the fully open area in the nonwoven fabric for raising seedlings was calculated.
【００１２】このような育苗用不織布は、長手方向及び
幅方向の引張強力の和が１〜５ｋｇ／５ｃｍ幅である。
この引張強力の和が１ｋｇ／５ｃｍ幅未満であると、不
織布付き苗をロール状に巻回するときに、不織布付き苗
が破断しやすくなるので、好ましくない。一方、この引
張強力の和が５ｋｇ／５ｃｍ幅超えると、田植機によっ
て苗を掻き取る際、育苗用不織布が一緒に破断されにく
くなるので、好ましくない。ここで、引張強力の測定方
法は、以下のとおりである。即ち、ＪＩＳ Ｌ−１０９
６に記載のストリップ法に準じ、幅５ｃｍで長さ１５ｃ
ｍの試験片１０個を準備し、定速伸長型引張試験機（テ
ンシロンＵＴＭ−４−１−１００ 東洋ボールドウイン
社製）を用いて、掴み間隔１０ｃｍで引張速度１０ｃｍ
／分の条件で最大引張強力を測定し、試験片１０個の平
均値を育苗用不織布の引張強力（ｋｇ／５ｃｍ幅）とし
た。なお、長手方向の引張強力を測定する際は、試験片
の長手方向が不織布の長手方向に合致するようにし、幅
方向の引張強力を測定する際は、試験片の長手方向が不
織布の幅方向に合致するようにして、測定することは言
うまでもない。The nonwoven fabric for seedling raising has a total tensile strength in the longitudinal direction and the width direction of 1 to 5 kg / 5 cm.
If the sum of the tensile strengths is less than 1 kg / 5 cm width, the seedling with the nonwoven fabric is easily broken when the seedling with the nonwoven fabric is wound into a roll, which is not preferable. On the other hand, if the sum of the tensile strengths exceeds 5 kg / 5 cm width, the nonwoven fabric for raising seedlings is less likely to be broken at the same time when the seedlings are scraped by the rice transplanter, which is not preferable. Here, the measuring method of the tensile strength is as follows. That is, JIS L-109
According to the strip method described in 6, a width of 5 cm and a length of 15 c
m of test pieces were prepared, and a constant-speed elongation type tensile tester (Tensilon UTM-4-1-100 manufactured by Toyo Baldwin Co., Ltd.) was used.
The maximum tensile strength was measured under the conditions of / min, and the average value of 10 test pieces was defined as the tensile strength (kg / 5 cm width) of the nonwoven fabric for raising seedlings. When measuring the tensile strength in the longitudinal direction, the longitudinal direction of the test piece should match the longitudinal direction of the nonwoven fabric, and when measuring the tensile strength in the width direction, the longitudinal direction of the test piece should be in the width direction of the nonwoven fabric. It goes without saying that the measurement is performed in such a manner as to conform to the above.
【００１３】また、本発明においては、育苗用不織布の
幅方向の引裂強力は、８００ｇ以下である。この引裂強
力が８００ｇを超えると、田植機によって苗を掻き取る
際、育苗用不織布が破断されにくく、苗が損傷しやすく
なるため、好ましくない。育苗用不織布の長手方向の引
裂強力については、任意であり、８００ｇを超えても差
し支えない。この理由は、育苗用不織布の長手方向につ
いては、田植機に付設された鎌によって、比較的容易に
破断するからである。ここで、引裂強力の測定方法は、
引張強力を測定したときと同様の形状の試験片１０個に
ついて、ＪＩＳＬ−１０９６のペンジュラム法に基づい
て測定し、その平均値を育苗用不織布の引裂強力とし
た。育苗用不織布の幅方向の引裂強力を測定する際に
は、不織布の幅方向が試験片の長手方向となるようにし
て測定することは、引張強力の場合と同様である。な
お、本発明に係る育苗用不織布の目付は、１０〜８０ｇ
／ｍ2程度であるのが好ましい。この程度の目付である
と、軽量であり、且つ不織布自体の形態安定性もある程
度維持できるからである。Further, in the present invention, the tear strength in the width direction of the non-woven fabric for raising seedlings is 800 g or less. When the tear strength exceeds 800 g, the nonwoven fabric for raising seedlings is not easily broken when the seedlings are scraped by a rice transplanter, and the seedlings are easily damaged, which is not preferable. The tear strength of the nonwoven fabric for raising seedlings in the longitudinal direction is arbitrary, and may exceed 800 g. The reason for this is that in the longitudinal direction of the seedling-raising nonwoven fabric, it is relatively easily broken by a sickle attached to the rice transplanter. Here, the method of measuring the tear strength is
Ten test pieces having the same shape as when the tensile strength was measured were measured based on the pendulum method of JISL-1096, and the average value was regarded as the tear strength of the nonwoven fabric for raising seedlings. When measuring the tear strength in the width direction of the nonwoven fabric for raising seedling, measuring the nonwoven fabric so that the width direction of the nonwoven fabric is the longitudinal direction of the test piece is the same as in the case of the tensile strength. In addition, the basis weight of the nonwoven fabric for seedling raising according to the present invention is 10 to 80 g.
/ M 2 . This is because the weight per unit area is light and the dimensional stability of the nonwoven fabric itself can be maintained to some extent.
【００１４】上記したような、連続区域と開孔区域とを
持つ稲の育苗用不織布は、例えば、以下のような方法で
好適に製造することができる。まず、準備した生分解性
繊維を、カード法やスパンボンド法等の従来公知の方法
で、開繊及び集積して繊維ウェブを作成する。繊維ウェ
ブ中の生分解性繊維は、単に集積されているだけである
ため、繊維相互間は殆ど固定されておらず、形態安定性
の殆ど無いものである。作成した繊維ウェブは、粗目織
物上に坦持される。粗目織物としては、経糸及び緯糸と
して金属線又は太繊度の合成樹脂製フィラメント等を用
いて、平織組織又は綾織組織等の任意の織組織で製織さ
れたものが採用される。特に、後に高圧水流が当たるた
め、剛性の高い粗目織物を用いるのが好ましく、金属線
を用いて製織された、いわゆる金属製メッシュスクリー
ンを用いるのが好ましい。また、粗目織物の目の粗さは
任意であるが、一般的に、３〜２０メッシュ程度の目開
きを持つものが好ましい。The above-described nonwoven fabric for raising rice seedling having a continuous area and an open area can be suitably produced by, for example, the following method. First, the prepared biodegradable fiber is spread and accumulated by a conventionally known method such as a card method or a spun bond method to prepare a fiber web. Since the biodegradable fibers in the fibrous web are merely accumulated, the fibers are hardly fixed between the fibers and have little form stability. The prepared fiber web is supported on a coarse woven fabric. As the coarse woven fabric, a woven fabric having an arbitrary woven structure such as a plain woven structure or a twill woven structure using a metal wire or a filament made of a synthetic fiber having a large fineness as a warp and a weft is used. In particular, since a high-pressure water stream is applied later, it is preferable to use a coarse woven fabric having high rigidity, and it is preferable to use a so-called metal mesh screen woven using a metal wire. In addition, although the coarseness of the coarse woven fabric is arbitrary, it is generally preferable that the coarse woven fabric has a mesh size of about 3 to 20 mesh.
【００１５】粗目織物上に坦持された繊維ウェブに向け
て、高圧水流を噴射する。高圧水流は、粗目織物が存在
する反対側から、即ち、直接繊維ウェブに当たるように
して、噴射される。高圧水流は、噴射ノズルから高圧で
水を噴射すれば、容易に得ることができる。噴射圧力と
しては、１０〜１００ｋｇ／ｃｍ2程度で良い。噴射圧
力が低すぎると、繊維相互間の絡み合いが少なくなり、
形態安定性に優れた育苗用不織布が得られにくくなる。
また、噴射圧力が高すぎると、繊維相互間の絡み合いが
緊密になりすぎて、引張強力が高くなりすぎ、田植機に
よる苗の掻き取りの際に、破断しにくくなる。また、高
圧水流は、繊維ウェブに一回だけ施しても良いし、2 回
以上数回施しても良い。[0015] A high-pressure stream of water is sprayed onto the fibrous web carried on the coarse fabric. The high-pressure water stream is injected from the opposite side where the coarse fabric is present, ie, directly against the fibrous web. A high-pressure water stream can be easily obtained by injecting water at a high pressure from an injection nozzle. The injection pressure may be about 10 to 100 kg / cm 2 . If the injection pressure is too low, the entanglement between the fibers will decrease,
It becomes difficult to obtain a nonwoven fabric for raising seedlings having excellent morphological stability.
On the other hand, if the injection pressure is too high, the entanglement between the fibers becomes too tight, the tensile strength becomes too high, and the seedlings are less likely to break when scraped by a rice transplanter. The high-pressure water flow may be applied only once to the fiber web, or may be applied two or more times.
【００１６】このようにして高圧水流を繊維ウェブに施
すと、繊維ウェブ中の生分解性繊維は殆ど固定されてい
ないため、以下のように運動する。即ち、粗目織物の経
糸と緯糸の交点近傍上に位置する生分解性繊維は、高圧
水流によって、経糸と緯糸の交点近傍外の箇所、特に、
粗目織物の目の方へ移動する。従って、繊維ウェブ中の
生分解性繊維は、交点近傍外の箇所に密集すると共に、
交点近傍上からは排除されて孔が開く。そしてまた、高
圧水流によるエネルギーで、生分解性繊維に捩れや曲が
りが生じ、密集した生分解性繊維相互間が絡み合うので
ある。以上のようにして、粗目織物の経糸と緯糸の交点
近傍に対応する箇所が開孔区域となり、この交点近傍外
の箇所は生分解性繊維が密集して絡み合った連続区域と
なる育苗用不織布が得られるのである。When the high-pressure water flow is applied to the fibrous web as described above, the biodegradable fibers in the fibrous web are hardly fixed, and move as follows. That is, the biodegradable fiber located near the intersection of the warp and the weft of the coarse woven fabric, by the high-pressure water flow, a location outside the vicinity of the intersection of the warp and the weft,
Move to the coarse weave. Therefore, the biodegradable fibers in the fibrous web are densely packed at a point outside the vicinity of the intersection,
The hole is removed from the vicinity of the intersection and opened. In addition, the biodegradable fibers are twisted or bent by the energy of the high-pressure water flow, and the dense biodegradable fibers are entangled with each other. As described above, the area corresponding to the vicinity of the intersection of the warp and the weft of the coarse woven fabric is an open area, and the area outside the vicinity of the intersection is a continuous area where biodegradable fibers are densely entangled with each other. You get it.
【００１７】生分解性繊維として、ポリ乳酸系繊維や脂
肪族ポリエステル系繊維等の熱可塑性繊維を用いた場合
には、開孔区域及び連続区域を形成した後、熱処理し
て、連続区域における生分解性繊維相互間を熱融着する
のが好ましい。熱融着により、育苗用不織布の形態安定
性や引張強力が更に向上するからである。熱処理として
は、従来公知の任意の方法を採用することができ、例え
ば、熱風乾燥機中に通す方法や、一対の熱ロール中に導
入する方法等を採用することができる。When a thermoplastic fiber such as a polylactic acid-based fiber or an aliphatic polyester-based fiber is used as the biodegradable fiber, an open area and a continuous area are formed, and then heat treatment is performed. It is preferred that the degradable fibers be heat-sealed. This is because heat fusion further improves the morphological stability and tensile strength of the nonwoven fabric for raising seedlings. As the heat treatment, any conventionally known method can be adopted, for example, a method of passing through a hot air drier, a method of introducing into a pair of hot rolls, or the like.
【００１８】[0018]
【実施例】以下、実施例に基づいて本発明を説明する
が、本発明は実施例に限定されるものではない。本発明
に係る育苗用不織布は、基本的に、稲苗の根が侵入しや
すい開孔区域と、ある程度の形態安定性を維持するため
に、生分解性繊維が密集し絡み合った連続区域とを持つ
ものであると理解されるべきである。また、本発明に係
る育苗用不織布の製造方法は、開孔区域と連続区域とを
一挙に得る合理的な方法として理解されるべきである。Hereinafter, the present invention will be described based on examples, but the present invention is not limited to the examples. The non-woven fabric for raising seedlings according to the present invention basically includes an open area where the roots of rice seedlings easily penetrate, and a continuous area where biodegradable fibers are densely entangled with each other in order to maintain some form stability. Should be understood as having. In addition, the method for producing a nonwoven fabric for raising seedlings according to the present invention should be understood as a rational method for simultaneously obtaining an open area and a continuous area.
【００１９】実施例１ 平均繊度１．５デニール、平均繊維長２４ｍｍの木綿の
晒綿を用いて、ランダムカード機にて、目付３０ｇ／ｍ
2の繊維ウェブを準備した。この繊維ウェブを目開き８
メッシュの金属製メッシュスクリーン（金属線で平織組
織で製織された粗目織物）上に坦持して、繊維ウェブに
向けて高圧水流を噴射した。高圧水流は、孔径０．１ｍ
ｍの噴射孔が孔間隔０．６ｍｍで配置された装置を用
い、繊維ウェブの上方（即ち、金属製メッシュスクリー
ンの位置する反対側上方）５０ｍｍの位置から３５ｋｇ
／ｃｍ2Ｇの圧力で繊維ウェブに１回噴射して、多数の
開孔区域と晒綿が密集し絡み合った連続区域とを有する
不織布を得た。そして、この不織布より過剰水分の除去
と乾燥処理を施し、育苗用不織布とした。この育苗用不
織布の各種物性は、表１に示すとおりであった。Example 1 Using a bleached cotton with an average fineness of 1.5 denier and an average fiber length of 24 mm, using a random card machine, a basis weight of 30 g / m2 was used.
Two fiber webs were prepared. Open this fiber web with mesh 8
A high-pressure water stream was jetted toward the fiber web, supported on a mesh metal mesh screen (coarse fabric woven in a plain weave structure with metal wires). High pressure water flow, pore diameter 0.1m
35 kg from a position 50 mm above the fibrous web (that is, above the opposite side where the metal mesh screen is located) using an apparatus in which m injection holes are arranged at a hole interval of 0.6 mm.
A single injection at a pressure of / cm 2 G onto the fibrous web resulted in a nonwoven fabric having a number of open areas and continuous areas of densely entangled bleached cotton. Then, excess water was removed from this nonwoven fabric and a drying treatment was performed to obtain a nonwoven fabric for raising seedlings. Various physical properties of the nonwoven fabric for raising seedlings were as shown in Table 1.
【００２０】実施例２ 繊維ウェブの目付を４５ｇ／ｃｍ2としたこと、高圧水
流の噴射圧力を５０ｋｇ／ｃｍ2Ｇとしたこと、及び高
圧水流を噴射する回数を４回としたことの他は、実施例
１と同様の方法で育苗用不織布を得た。この育苗用不織
布の各種物性は、表１に示すとおりであった。Example 2 Except that the basis weight of the fiber web was 45 g / cm 2 , the injection pressure of the high-pressure water stream was 50 kg / cm 2 G, and the number of times of injection of the high-pressure water stream was four times A nonwoven fabric for raising seedlings was obtained in the same manner as in Example 1. Various physical properties of the nonwoven fabric for raising seedlings were as shown in Table 1.
【００２１】実施例３ 平均繊度１．５デニール、平均繊維長２４ｍｍの木綿の
晒綿５０重量％と、平均繊度２デニール、平均繊維長３
８ｍｍのレーヨン短繊維５０重量％とを均一に混合し、
ランダムカード機にて、目付４５ｇ／ｍ2の繊維ウェブ
を準備した。この繊維ウェブに、高圧水流の噴射圧力を
５０ｋｇ／ｃｍ2Ｇとしたこと、及び高圧水流を噴射す
る回数を４回としたことの他は、実施例１と同様の方法
で育苗用不織布を得た。この育苗用不織布の各種物性
は、表１に示すとおりであった。Example 3 50% by weight of cotton bleached cotton having an average fineness of 1.5 denier and an average fiber length of 24 mm, an average fineness of 2 denier and an average fiber length of 3
8mm rayon short fiber 50% by weight is uniformly mixed
Using a random card machine, a fiber web having a basis weight of 45 g / m 2 was prepared. A nonwoven fabric for raising seedlings was obtained in the same manner as in Example 1 except that the injection pressure of the high-pressure water stream was set to 50 kg / cm 2 G and the number of times of injection of the high-pressure water stream was set to four times. Was. Various physical properties of the nonwoven fabric for raising seedlings were as shown in Table 1.
【００２２】実施例４（参考例） 金属製メッシュスクリーンとして、目開き２５メッシュ
のものを使用する他は、実施例２と同様の方法で育苗用
不織布を得た。この育苗用不織布の各種物性は、表１に
示すとおりであった。Example 4 (Reference Example) A nonwoven fabric for raising seedlings was obtained in the same manner as in Example 2, except that a metal mesh screen having a mesh size of 25 mesh was used. Various physical properties of the nonwoven fabric for raising seedlings were as shown in Table 1.
【００２３】以上のようにして得られ実施例１〜４に係
る育苗用不織布を、所定の長尺形状に裁断し、播種床に
敷設し、水稲の種籾を播き、水耕苗を育苗した。発芽し
た１００本の苗について、不織布表面から種籾の根の基
部までの高さを測定し、不織布上に浮き上がる高さが１
０ｍｍ以上の数の割合を浮き上がり率とし、浮き上がり
率が１０％以下のものを○、浮き上がり率が１０％を超
えるものを×として、表１に示した。また、育苗を終え
た不織布付き苗をロール状に巻回し、田植機に載せて苗
の移植を行った。その際、不織布が良好に破断し、苗の
掻き取り性の良いものを「良好」とし、不織布が破断し
にくく、苗の掻き取り性の悪いものを「不良」と評価
し、表１に示した。The seedling-raising nonwoven fabric according to Examples 1 to 4 obtained as described above was cut into a predetermined elongate shape, laid on a seeding floor, and rice seeds were sown, and hydroponic seedlings were raised. For 100 seedlings that have germinated, the height from the surface of the nonwoven fabric to the base of the seed rice root is measured, and the height that floats on the nonwoven fabric is 1
Table 1 shows the ratio of the number equal to or greater than 0 mm as the lifting ratio, の も の when the lifting ratio was 10% or less, and X when the lifting ratio exceeded 10%. Further, the seedlings with the nonwoven fabric after the raising of the seedlings were wound in a roll shape, and mounted on a rice transplanter to transplant the seedlings. At that time, the nonwoven fabric was satisfactorily ruptured, and those with good seedling scraping properties were evaluated as “good”, and those with less nonwoven fabric rupture and poor seedling scraping properties were evaluated as “bad”. Was.
【００２４】[0024]
【表１】 [Table 1]
【００２５】表１中における「不織布の厚み」は、試料
幅１０ｃｍ、試料長１０ｃｍの試料片を５個を作成し、
各々の試料片について、４．５ｇ／ｃｍ2の荷重を厚さ
方向に印加して測定した厚みの平均値を、不織布の厚み
とした。また、「不織布の引張伸度」は、引張強力を測
定するのと同様の方法で測定し、不織布が破断した際の
伸長率を引張伸度とした。なお、表１中における「Ｍ
Ｄ」との表記は、不織布の長手方向（機械方向）のこと
を意味し、「ＣＤ」との表記は不織布の幅方向のことを
意味している。The "thickness of the nonwoven fabric" in Table 1 was obtained by preparing five sample pieces each having a sample width of 10 cm and a sample length of
The average value of the thickness of each sample piece measured by applying a load of 4.5 g / cm 2 in the thickness direction was defined as the thickness of the nonwoven fabric. The "tensile elongation of the nonwoven fabric" was measured by the same method as that for measuring the tensile strength, and the elongation at break of the nonwoven fabric was defined as the tensile elongation. Note that “M” in Table 1
The notation "D" means the longitudinal direction (machine direction) of the nonwoven fabric, and the notation "CD" means the width direction of the nonwoven fabric.
【００２６】[0026]
【作用及び発明の効果】本発明に係る育苗用不織布は、
所定の大きさの開孔区域を、所定の面積割合で具備して
なるため、種籾から発芽した根が、不織布の裏面に良好
に張る。従って、不織布表面上に根が浮き上がりにく
い。依って、この不織布付き苗をロール状に巻回した場
合、更に不織布付き苗を田植機に載せて、苗を掻き取り
ながら田に移植する場合に、苗を傷めることが少ないと
いう効果を奏する。The nonwoven fabric for raising seedlings according to the present invention comprises:
Since the opening area having a predetermined size is provided at a predetermined area ratio, the roots germinated from the seed rice are satisfactorily stretched on the back surface of the nonwoven fabric. Therefore, it is difficult for roots to rise on the surface of the nonwoven fabric. Therefore, when this seedling with a nonwoven fabric is wound in a roll shape, when the seedling with a nonwoven fabric is further placed on a rice transplanter and transplanted into a rice field while scraping the seedling, the seedling is less likely to be damaged.
【００２７】また、本発明に係る育苗用不織布は、生分
解性繊維が密集すると共に絡み合ってなる連続区域の存
在によって、所定の引張強力を具備させることができ
る。従って、育苗用不織布に所望の形態安定性を付与す
ることができ、不織布付き苗を巻回しやすく、所望のロ
ール状とすることができる。また、所定の引張強力とな
っているため、不織布付き苗を田植機に載せて、苗を掻
き取る場合、不織布も簡単に破断し、苗の移植作業が連
続して効率的に行えるという効果を奏する。Further, the nonwoven fabric for raising seedlings according to the present invention can be provided with a predetermined tensile strength by virtue of the continuous area where the biodegradable fibers are densely entangled. Therefore, desired morphological stability can be imparted to the seedling nonwoven fabric, the seedling with the nonwoven fabric can be easily wound, and a desired roll shape can be obtained. In addition, because it has a predetermined tensile strength, when placing a seedling with a nonwoven fabric on a rice transplanter and scraping the seedling, the nonwoven fabric is also easily broken, and the effect of continuously and efficiently transplanting the seedlings can be achieved. Play.
【００２８】更に、本発明に係る育苗用不織布は、生分
解性繊維で構成されているため、田に移植した後、徐々
に崩壊し、最終的には二酸化炭素，水及びその他炭化物
となって、消失してしまう。従って、本発明に係る育苗
用不織布は、土壌中にそのまま残存させておいても、土
壌に対して悪影響を与えるものではないので、育苗用不
織布を土壌中から除去するという作業が不要になるとい
う効果も奏する。Further, since the non-woven fabric for raising seedling according to the present invention is composed of biodegradable fibers, it is gradually disintegrated after transplanting to a rice field, and finally becomes carbon dioxide, water and other carbides. , Will disappear. Therefore, since the nonwoven fabric for seedling raising according to the present invention does not adversely affect the soil even if it is left as it is in the soil, the operation of removing the nonwoven fabric for seedling growth from the soil becomes unnecessary. It also has an effect.
【００２９】また、本発明に係る育苗用不織布の製造方
法を採用すれば、粗目織物と高圧水流とを併用すること
によって、苗の根を通すための開孔区域と、形態安定性
に寄与する連続区域とを具備する育苗用不織布を容易に
得られる。従って、合理的に育苗用不織布を得ることが
できるという効果を奏する。When the method for producing a nonwoven fabric for raising seedlings according to the present invention is employed, the combined use of the coarse woven fabric and the high-pressure water stream contributes to the opening area for the roots of the seedlings and the morphological stability. A nonwoven fabric for raising seedlings having a continuous area can be easily obtained. Therefore, there is an effect that a nonwoven fabric for raising seedlings can be rationally obtained.
【図１】本発明の一例に係る育苗用不織布の平面図であ
り、白色区域が連続区域であり、黒色区域が開孔区域で
ある。FIG. 1 is a plan view of a seedling-raising nonwoven fabric according to an example of the present invention, in which a white area is a continuous area and a black area is an aperture area.
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１１年４月１日[Submission date] April 1, 1999
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の名称[Correction target item name] Name of invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【発明の名称】 稲の育苗用不織布[Title of the Invention] Nonwoven fabric for raising rice seedlings
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００７】[0007]
【課題を解決するための手段】即ち、本発明は、生分解
性繊維相互が密集すると共に絡み合ってなる連続区域
と、該連続区域に囲まれて孤立して存在する多数の開孔
区域とよりなる稲の育苗用不織布であって、該開孔区域
の一個の面積は３〜２５ｍｍ2であると共に、該育苗用
不織布中における全開孔区域の面積の割合は３０〜７０
％であり、更に該育苗用不織布の長手方向及び幅方向の
引張強力の和は１〜５ｋｇ／５ｃｍ幅であり、且つ該育
苗用不織布の幅方向の引裂強力は８００ｇ以下であるこ
とを特徴とする稲の育苗用不織布に関するものである。That is, the present invention is directed to a continuous area in which biodegradable fibers are densely entangled with each other, and a large number of isolated open areas surrounded by the continuous area. A non-woven fabric for raising rice seedling, wherein the area of one of the open areas is 3 to 25 mm 2 , and the ratio of the area of the whole open area to the non-woven cloth for growing seedling is 30 to 70.
%, The sum of the tensile strengths in the longitudinal direction and the width direction of the seedling-raising nonwoven fabric is 1 to 5 kg / 5 cm in width, and the tear strength in the width direction of the seedling-raising nonwoven fabric is 800 g or less. The present invention relates to a nonwoven fabric for raising rice seedlings.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１８[Correction target item name] 0018
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１８】[0018]
【実施例】以下、実施例に基づいて本発明を説明する
が、本発明は実施例に限定されるものではない。本発明
に係る育苗用不織布は、基本的に、稲苗の根が侵入しや
すい開孔区域と、ある程度の形態安定性を維持するため
に、生分解性繊維が密集し絡み合った連続区域とを持つ
ものであると理解されるべきである。Hereinafter, the present invention will be described based on examples, but the present invention is not limited to the examples. The non-woven fabric for raising seedlings according to the present invention basically includes an open area where the roots of rice seedlings easily penetrate, and a continuous area where biodegradable fibers are densely entangled with each other in order to maintain some form stability. Should be understood as having.
【手続補正５】[Procedure amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２０[Correction target item name] 0020
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２０】実施例２ 繊維ウェブの目付を４５ｇ／ｍ2としたこと、高圧水流
の噴射圧力を５０ｋｇ／ｃｍ2Ｇとしたこと、及び高圧
水流を噴射する回数を４回としたことの他は、実施例１
と同様の方法で育苗用不織布を得た。この育苗用不織布
の各種物性は、表１に示すとおりであった。Example 2 Except that the basis weight of the fiber web was 45 g / m 2 , the injection pressure of the high-pressure water stream was 50 kg / cm 2 G, and the number of times of injection of the high-pressure water stream was four times Example 1
A nonwoven fabric for raising seedlings was obtained in the same manner as described above. Various physical properties of the nonwoven fabric for raising seedlings were as shown in Table 1.
【手続補正６】[Procedure amendment 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２２[Correction target item name] 0022
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２２】比較例 金属製メッシュスクリーンとして、目開き２５メッシュ
のものを使用する他は、実施例２と同様の方法で育苗用
不織布を得た。この育苗用不織布の各種物性は、表１に
示すとおりであった。 Comparative Example A nonwoven fabric for raising seedlings was obtained in the same manner as in Example 2, except that a mesh screen made of metal having a mesh size of 25 was used. Various physical properties of the nonwoven fabric for raising seedlings were as shown in Table 1.
【手続補正７】[Procedure amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２３[Correction target item name] 0023
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２３】以上のようにして得られた実施例１〜３及
び比較例に係る育苗用不織布を、所定の長尺形状に裁断
し、播種床に敷設し、水稲の種籾を播き、水耕苗を育苗
した。発芽した１００本の苗について、不織布表面から
種籾の根の基部までの高さを測定し、不織布上に浮き上
がる高さが１０ｍｍ以上の数の割合を浮き上がり率と
し、浮き上がり率が１０％以下のものを○、浮き上がり
率が１０％を超えるものを×として、表１に示した。ま
た、育苗を終えた不織布付き苗をロール状に巻回し、田
植機に載せて苗の移植を行った。その際、不織布が良好
に破断し、苗の掻き取り性の良いものを「良好」とし、
不織布が破断しにくく、苗の掻き取り性の悪いものを
「不良」と評価し、表１に示した。[0023] The thus-obtained Example 1-3及
The nonwoven fabric for raising seedlings according to Comparative Examples and Comparative Examples was cut into a predetermined elongate shape, laid on a seeding floor, seeded with paddy rice, and cultivated with hydroponics. For 100 seedlings that have germinated, measure the height from the surface of the nonwoven fabric to the base of the seed rice root, and set the ratio of the number that is raised above the nonwoven fabric to 10 mm or more as the lifting ratio, and the lifting ratio is 10% or less. Is shown in Table 1 as ○, and as × when the lifting ratio exceeds 10%. Further, the seedlings with the nonwoven fabric after the raising of the seedlings were wound in a roll shape, and mounted on a rice transplanter to transplant the seedlings. At that time, the non-woven fabric was broken well, and those with good scraping properties of the seedlings were regarded as `` good '',
Those in which the nonwoven fabric was not easily broken and the seedlings had poor scraping properties were evaluated as "poor" and are shown in Table 1.
【手続補正８】[Procedure amendment 8]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２４[Correction target item name] 0024
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２４】[0024]
【表１】 [Table 1]
【手続補正９】[Procedure amendment 9]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２９[Correction target item name] 0029
【補正方法】削除[Correction method] Deleted
Claims (5)
合ってなる連続区域と、該連続区域に囲まれて孤立して
存在する多数の開孔区域とよりなる稲の育苗用不織布で
あって、該開孔区域の一個の面積は３〜２５ｍｍ2であ
ると共に、該育苗用不織布中における全開孔区域の面積
の割合は３０〜７０％であり、更に該育苗用不織布の長
手方向及び幅方向の引張強力の和は１〜５ｋｇ／５ｃｍ
幅であり、且つ該育苗用不織布の幅方向の引裂強力は８
００ｇ以下であることを特徴とする稲の育苗用不織布。1. A nonwoven for raising rice seedling, comprising: a continuous area in which biodegradable fibers are densely entangled with each other, and a large number of isolated apertures surrounded by the continuous area; The area of one open area is 3 to 25 mm 2 , and the ratio of the area of all open areas in the non-woven seedling nonwoven fabric is 30 to 70%. The sum of tensile strength is 1-5kg / 5cm
And the tear strength in the width direction of the seedling nonwoven fabric is 8
A non-woven fabric for raising rice seedlings, which is not more than 00 g.
続区域において、生分解性繊維相互間が熱融着されてい
る請求項１記載の稲の育苗用不織布。2. The non-woven fabric for raising rice seedling according to claim 1, wherein the biodegradable fibers are thermoplastic fibers, and the biodegradable fibers are heat-sealed to each other in a continuous area.
繊維，ポリ乳酸系短繊維及び脂肪族ポリエステル系短繊
維よりなる群から選ばれた１種以上を用いる請求項１記
載の稲の育苗用不織布。3. The method according to claim 1, wherein the biodegradable fiber is at least one selected from the group consisting of cotton, rayon staple fiber, polylactic acid staple fiber and aliphatic polyester staple fiber. Non-woven fabric.
ブを、粗目織物上に坦持させると共に、該粗目織物が位
置する反対側から、該繊維ウェブに向けて高圧水流を噴
射して、該高圧水流の作用によって、該粗目織物の経糸
と緯糸の交点近傍上に存在する生分解性繊維を、該交点
近傍から該交点近傍外の区域に密集させると共に絡み合
わせて連続区域を形成し、且つ該交点に対応する開孔区
域を形成することを特徴とする稲の育苗用不織布の製造
方法。4. A fiber web in which biodegradable fibers are accumulated is supported on a coarse woven fabric, and a high-pressure water stream is jetted from the opposite side of the coarse woven fabric toward the fiber web, By the action of the high-pressure water flow, the biodegradable fibers present near the intersection of the warp and the weft of the coarse woven fabric are densely entangled with the area outside the vicinity of the intersection from the vicinity of the intersection to form a continuous area, And a method of producing a nonwoven fabric for raising rice seedlings, characterized by forming an opening area corresponding to the intersection.
い、連続区域及び開孔区域を形成した後、熱処理するこ
とによって、該連続区域中の生分解性繊維相互間を熱融
着する請求項４記載の稲の育苗用不織布の製造方法。5. The method according to claim 1, wherein a thermoplastic fiber is used as the biodegradable fiber, a continuous area and an open area are formed, and then heat treatment is performed to thermally fuse the biodegradable fibers in the continuous area. 4. The method for producing a nonwoven fabric for raising rice seedlings according to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10100374A JP2940608B1 (en) | 1998-03-26 | 1998-03-26 | Nonwoven fabric for raising rice seedlings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10100374A JP2940608B1 (en) | 1998-03-26 | 1998-03-26 | Nonwoven fabric for raising rice seedlings |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09445899A Division JP4201064B2 (en) | 1999-04-01 | 1999-04-01 | Method for producing non-woven rice seedling material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2940608B1 JP2940608B1 (en) | 1999-08-25 |
| JPH11275959A true JPH11275959A (en) | 1999-10-12 |
Family
ID=14272266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10100374A Expired - Fee Related JP2940608B1 (en) | 1998-03-26 | 1998-03-26 | Nonwoven fabric for raising rice seedlings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2940608B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010028037A3 (en) * | 2008-09-03 | 2010-06-10 | Rynel Inc. | Biopolymer-based growth media, and methods of making and using same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4509528B2 (en) * | 2003-10-22 | 2010-07-21 | 株式会社クラレ | Nonwoven fabric for hydroponics rice seedling |
-
1998
- 1998-03-26 JP JP10100374A patent/JP2940608B1/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010028037A3 (en) * | 2008-09-03 | 2010-06-10 | Rynel Inc. | Biopolymer-based growth media, and methods of making and using same |
| US8671616B2 (en) | 2008-09-03 | 2014-03-18 | Grow-Tech Llc | Biopolymer-based growth media, and methods of making and using same |
| USRE46716E1 (en) | 2008-09-03 | 2018-02-20 | Grow Tech, Inc. | Biopolymer-based growth media, and methods of making and using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2940608B1 (en) | 1999-08-25 |
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