JP3632844B2 - Method for producing laminated nonwoven fabric - Google Patents
Method for producing laminated nonwoven fabric Download PDFInfo
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- JP3632844B2 JP3632844B2 JP2001103700A JP2001103700A JP3632844B2 JP 3632844 B2 JP3632844 B2 JP 3632844B2 JP 2001103700 A JP2001103700 A JP 2001103700A JP 2001103700 A JP2001103700 A JP 2001103700A JP 3632844 B2 JP3632844 B2 JP 3632844B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、不織ウエッブ又は不織布に複合材料用繊維群を積層する不織布の製造方法に関する。得られた複合材料用繊維積層不織布はそのままで又は予備形成体として使用されるものである。
【０００２】
【従来の技術】
従来より、不織布の強度を補強するためにガラス繊維などの補強繊維を不織ウエッブ又は不織布と積層複合することが行われている。例えば、米国特許第５１１８５５０号公報では、不織布ウエッブ製造工程で補強繊維であるガラスヤーンをクリールより引き出し、不織布ウエッブの上に積層したり、不織布ウエッブの中間層にガラスヤーンを挿入するものであり、ガラスヤーン切断時の修正やボビン替えや品番切替等の作業性が非常に悪く、また、不織布ウエッブ製造工程でガラスヤーンを挿入するため、設備が過大となり、設備費及び設置場所が大きくコスト高になる問題があった。
また、従来の方法では、積層される複合材料用繊維群の加工張力に差が生じ、得られる積層体にソリ、曲がり等の外観不良が発生し易い欠点があった。
【０００３】
【発明が解決しようとする課題】
本発明は、上記従来の不織ウエッブ又は不織布に複合材料用繊維群を積層する方法における上記欠点を改善するものであり、即ち、補強繊維が切断した時の修正やボビン替え、品番切替等の作業性に優れ、かつ製造設備が過大にならず、不織ウエッブ又は不織布に複合材料用繊維群を簡易に積層することができるのみならず、積層体でのソリ、曲がり等の外観不良の発生を防止する積層不織布の製造方法を提供しようとするものである。
【０００４】
【課題を解決するための手段】
即ち、本発明は、不織ウエッブ又は不織布に複合材料用繊維群を積層してニードルパンチ工程で不織ウエッブ又は不織布と複合材料用繊維とを連続的に絡合一体化させるに際し、複数本の複合材料用繊維を、クリールから引き出し、筬及び／又は張力制御装置を介在させて一方向に配列させ、かつ走行する不織ウエッブ又は不織布に駆動フィードニップロール装置より一定速度で供給して積層しながら、フェルティングニードルを用いてニードルパンチする事を特徴とする積層不織布の製造方法である。
【０００５】
【発明の実施の形態】
本発明における不織ウエッブ又は不織布（以下、単に不織布と記す）としては、長繊維、短繊維のいずれでもよく、例えば、短繊維のカード不織布、サマーマルボンド不織布、ウォータジェット法によるスパンレース不織布、ステッチボンド不織布、スパンボンド不織布、スパンボンド方式により形成され、かつ熱圧着された不織布などが挙げられるがこれらに限定されるものではない。
【０００６】
不織布の素材としては、木綿、羊毛、絹などの天然繊維、レーヨンなどの半合成繊維、ポリエステル、ポリアミド、ポリオレフィン、ＰＶＡ、ビニロンなどの合成繊維、高強力ポリエチレン繊維、アラミド系繊維などのハイモジュラス繊維などであり、特に限定されるものではない。
【０００７】
合成繊維の中で、製造のし易さ、性能とコストのバランス、リサイクル材料用の利用などの観点からポリエステル系繊維が好ましい。
ポリエステル系繊維としては、ポリエチレンテレフタレート、ポリブチレンテレフタレートなどはもとより、イソフタル酸、アジピン酸、ジエチレングリコール、トリメチレングリコール、ポリテトラメチレングルコールなどの共重合成分の共重合ポリエステル、ポリエチレンナフタレート及びこれらの共重合物も使用することができる。またこれらの共重合物からなる繊維で芯鞘構造又はサイドバイサイド等の複合繊維であっても良い。
【０００８】
積層される不織布の目付は、求められる特性によって適宜選択されるが、通常４０〜５００ｇ／ｍ２であり、性能、製品重量、コストなどの関係から４０〜２００ｇ／ｍ２が好ましい。
不織布繊維の繊度は、特に限定されないが、通常１〜２２ｄｔｅｘであり、製造のし易さから２〜１７ｄｔｅｘが好ましい。
【０００９】
不織布が合成繊維の場合、通常、溶融紡糸されてウェッブが形成されるが、必要に応じて、溶融紡糸の段階で開繊性改良剤を、また紡糸或はウェッブ形成の段階で酸化防止剤、安定剤、紫外線吸収剤などを付与することができる。
不織布が合成繊維でない場合や熱可塑性でない場合は、ポリエステル、ポリアミド、ポリエチレンなどの公知のホットメルト型のバインダー繊維を混用することができる。
【００１０】
本発明における複合材料用繊維とは、補強効果を得る事が出来る複合材料用繊維であり、例えば、炭素繊維、鉱物繊維、ガラス繊維、金属繊維などの無機繊維やポリアラミド系、ポリエーテルケトン、ポリエーテルスルホン、ポリベンゾオキサゾールなどの高弾性有機繊維を挙げることができ、これらは、用途に応じて適宜選択できる。これらの繊維は、引張り強さが４．０ｇ／ｄｔｅｘ以上、伸度が４０％以下、１８０℃乾熱収縮率が３．０％以下であることが好ましい。引張り強さが４．０ｇ／ｄｔｅｘ未満であると、補強効果が低く、又１８０℃乾熱収縮率が３．０％を超えると、アスファルト加工などの高温での加工の際、熱履歴により収縮し加工製品としてソリが発生することがある。
【００１１】
本発明における複合材料用繊維は、例えば、図１に示すように、ケーキ、ボビン、リールなど捲かれてパッケージ状態１でクリールスタンドにセットされ、複数本の複合材料用繊維は、クリールからテンションガイド（張力制御装置）２を介して引き出されて筬３〜５を通して互いに平行で所望の間隔（ピッチ）に配列され、長手方向に走行可能なようにセットされる。
この配列されてなる複数本の複合材料用繊維は、駆動式フィードニップロール装置８を介在させて一定速度で、更に筬６〜７を通してニードルパンチ機へ供給される。
【００１２】
一方、積層させる不織布は、配列された複数本の複合材料用繊維の上方と下方からニードルパンチ機へ供給できるようにセットされ、ニードルパンチ機へ供給される。
不織布及び複数本の複合材料用繊維は、ニードルパンチ機のフィードニップロール９の所で不織布／複数本の複合材料用繊維／不織布の３層に重ね合わされた後、ニードルパンチ処理が施される。ニードルパンチ処理された積層不織布は、デリベリーロール１０を経て次の工程に供給される。
【００１３】
本発明において、クリールから供給される複合材料用繊維群は、駆動式フィードニップロール装置に供給されることにより、次工程のニードルパンチのフィードニップロールとデリベリーロール間の速度を調整することができ、複合材料用繊維群の張力をコントロールする事ができ、積層体のソリ、曲がり等の外観不良の発生を防止することができる。
通常、不織布積層体をニードルパンチすると、フェルティングニードルのバーブに繊維が引っ掛かり垂直方向に繊維移動が起こるため、不織布積層体の端部が変形する、所謂、巾入り現象が発生する。
このため駆動式フィードニップロール装置を設けない場合、複合材料用繊維群の張力はニードルパンチ工程で発生する巾入り現象に引きずられて巾方向で制御出来なくなり易い。即ち、積層される複合材料用繊維群の加工張力に差が生じ、操業性が悪化するとともに得られる積層体にソリ、曲がり等の外観不良が発生し易くなる。
【００１４】
本発明における複数本の複合材料用繊維は、不織布の長手方向に平行に所定の間隔で挿入積層されるが、挿入ピッチは、３〜３０ｍｍが好ましく、３〜１０ｍｍがより好ましい。挿入ピッチを大きくするとアスファルトなどの含浸後に不織布の収縮により表面に凸凹が発生しやすくなり、又挿入ピッチを小さくすると物性上の問題はないが、繊維使用量が増えるだけ不経済である。
【００１５】
ニードルパンチ処理は、挿入糸と不織布とを交絡させて積層不織布としての強度を向上させるために行なわれるが、ニードルパンチ処理における針密度は、２０〜１２０本／ｃｍ２にすることが好ましい。針密度が２０本／ｃｍ２未満では、交絡性が悪く積層効果が発現され難く、針密度が１２０本／ｃｍ２を超えると、積層不織布の表面の凹凸が大きくなったり、ガラス繊維の破断が起こり易くなる。
【００１６】
ニードルパンチ処理された積層不織布は、必要により、次いで加熱圧着処理及び／又は樹脂含浸処理が施される。
ニードルパンチ工程で一体化された積層不織布をさらに加熱処理する目的は、表裏の繊維を固定するとともに繊維間距離を最密充填させる事で基布としての剛性を付与するためである。加熱処理の方法としては、エンボスロールとフラットカレンダー間で熱圧着することが好ましい。この方法により、初期強力低下を抑制して、剛性を付与することができる。加工時の線圧は５０〜５００Ｎ／ｃｍが好ましく、より好ましくは１００〜３００Ｎ／ｃｍである。低線圧の場合は二層の繊維不織布の熱固定が不十分で基布としての剛性が得られにくい。又、高線圧の領域で加工すると中間層に挿入したガラス繊維がエンボスロールにより切断されて、得られる基布の初期応力が大巾に低下する傾向がある。さらに、加熱圧着処理において、フラット／フラットのカレンダーロールを使用すると二層の不織布が熱圧着され繊維間距離を最密充填する事は可能であるがドレープ性が増してしまう。
【００１７】
ニードルパンチ処理で絡合一体化させ、さらに不織布を加熱圧着処理した積層不織布は、不織布の繊維間どうしの交点を強固に固定するために、バインダー樹脂含浸処理することが好ましい。但し、前記のバインダー繊維が不織布に混用されている場合は、バインダー樹脂含浸処理は、省略することができる。
【００１８】
使用されるバインダー樹脂としては、尿素系、メラミン系、アクリル系、エポキシ系等の熱硬化性樹脂、熱可塑性樹脂など公知のものを使用することができ、これらは適宜併用して使用される。
バインダー樹脂の付着量は、積層不織布の３〜５０質量％が好ましく、５〜３０質量％が特に好ましい。バインダーの付着量が多すぎると、あとで含浸させるアスファルトなどの含浸性が低下する。逆に少なすぎるとアスファルト含浸工程などでの工程張力に絶えきれずに破断や捲き付きトラブルを発生することがある。
【００１９】
【実施例】
（実施例１）
融点２６０℃、極限粘度０．６３のポリエチレンテレフタレートを、口径０．３０ｍｍ、３００ホールの紡糸ノズルを用いて単孔吐出量 １．５ｇ／分・孔 、溶融温度２８５℃で吐出させ、紡糸速度４５００ｍ／分でエジェクターで牽引し細化・冷却して引き取り後、得られた繊維を金属ネット上に捕集しウェッブとした。このウェッブを熱圧着ロールで弱圧着し不織布とした。得られた不織布の目付は７０ｇ／ｍ２であった。
【００２０】
次に、上記製造法で得られた不織布を表裏に配置し、クリールスタンドにセットしたガラス繊維（ＥＣ９３４Ｚ２８Ｔ３０、ＶＥＴＲＯＴＥＸ社製）をクリールから引き出し、テンションガイド（張力制御装置）及び筬を介在させ、長手方向に互いに平行に３ｍｍピッチで配列させ、駆動式フィードニップロールで一定速度でニートルパンチ機に供給するとともに、該ガラス繊維群の上方と下方から上記製造法で得られた不織布を重ね合わせて、オルガン社製のニードル針（ＦＰＤ １−４０）を具備するニートルパンチ機で、針密度６０本／ｃｍ２でニードルパンチ処理し、中間層にガラス繊維を挿入した積層不織布を得た。該積層不織布の安定生産が可能で、かつ積層不織布の端部にソリ（波打ち）は認められなかった。次いで、該積層不織布を１８５℃のエンボスロールとフラットカレンダー間で加熱熱圧着処理後に、尿素メラミン樹脂とアクリル系樹脂との混合樹脂の含浸処理を定法により施し、ガラス繊維積層補強不織布を得た。得られたガラス繊維積層補強不織布について表１に示す。得られたガラス繊維積層補強不織布はガラス繊維の弛みもなく、積層不織布の端部のソリ（波打ち）も認められなかった。
【００２１】
（比較例１）
実施例１記載の製造法においてガラス繊維を一定速度で供給する駆動式フィードニップロールを使用しない以外は実施例１と同様にして積層不織布の製造を試みたが、駆動式フィードニップロールを使用しないと、巾入り現象で端部と中央部のガラス繊維張力が制御出来ずに端部のガラス繊維が弛み、筬等にガラス繊維が詰まり、糸切れが発生し、安定製造できる状態ではなかった。また、得られた積層不織布も端部にソリ（波打ち）が発生していた。
【００２２】
【表１】
【００２３】
【発明の効果】
本発明によれば、補強繊維が切断した時の修正やボビン替え、品番切替等の作業性に優れ、かつ製造設備が過大にならず、不織ウエッブ又は不織布に複合材料用繊維群を簡易に積層することができるのみならず、積層体でのソリ、曲がり等の外観不良の発生を防止することが可能である。
【図面の簡単な説明】
【図１】本発明の積層不織布の製造方法の工程の概略を示す模式図である。
【符号の説明】
１：複合繊維材料のパッケージ
２：張力制御装置（テンションガイド）
３〜７：筬
８：駆動式フィードニップロール
９：フィードニップロール
１０：デリベリーロール[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a nonwoven fabric in which a fiber group for a composite material is laminated on a nonwoven web or a nonwoven fabric. The obtained fiber laminated nonwoven fabric for composite materials is used as it is or as a preform.
[0002]
[Prior art]
Conventionally, in order to reinforce the strength of a nonwoven fabric, reinforcing fibers such as glass fibers are laminated and composited with a nonwoven web or a nonwoven fabric. For example, in U.S. Pat.No. 5,118,550, a glass yarn which is a reinforcing fiber in a nonwoven fabric web manufacturing process is drawn from a creel and laminated on the nonwoven fabric web, or a glass yarn is inserted into an intermediate layer of the nonwoven fabric web, Workability such as glass yarn cutting correction, bobbin change and product number switching is very bad, and the glass yarn is inserted in the nonwoven web manufacturing process, so the equipment becomes excessive and the equipment cost and installation place are large and expensive. There was a problem.
Further, in the conventional method, there is a defect that a difference occurs in the processing tension of the laminated composite fiber groups, and the resulting laminated body is likely to have appearance defects such as warpage and bending.
[0003]
[Problems to be solved by the invention]
The present invention improves the above-mentioned drawbacks in the conventional method of laminating a fiber group for a composite material on a nonwoven web or nonwoven fabric, that is, correction when the reinforcing fiber is cut, bobbin replacement, product number switching, etc. Excellent workability, production facilities are not excessive, and composite fiber groups can be easily laminated on non-woven webs or non-woven fabrics, as well as appearance defects such as warping and bending in the laminate. It is an object of the present invention to provide a method for producing a laminated nonwoven fabric that prevents the above.
[0004]
[Means for Solving the Problems]
That is, in the present invention, when a composite fiber group is laminated on a nonwoven web or nonwoven fabric, and the nonwoven web or nonwoven fabric and composite fiber are continuously entangled and integrated in a needle punching process, a plurality of fibers are used. While the composite fibers are pulled out from the creel, arranged in one direction with a heel and / or tension control device, and are fed to the traveling nonwoven web or nonwoven fabric at a constant speed from the drive feed nip roll device and laminated A method for producing a laminated nonwoven fabric, characterized in that needle punching is performed using a felting needle.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The nonwoven web or non-woven fabric in the present invention (hereinafter simply referred to as non-woven fabric) may be either a long fiber or a short fiber, for example, a short fiber card non-woven fabric, a summermal bond non-woven fabric, a spunlace non-woven fabric by a water jet method, Examples include, but are not limited to, stitchbonded nonwoven fabrics, spunbonded nonwoven fabrics, and nonwoven fabrics that are formed by a spunbond method and are thermocompression bonded.
[0006]
Non-woven fabric materials include natural fibers such as cotton, wool and silk, semi-synthetic fibers such as rayon, synthetic fibers such as polyester, polyamide, polyolefin, PVA and vinylon, high modulus fibers such as high-strength polyethylene fibers and aramid fibers. There is no particular limitation.
[0007]
Among the synthetic fibers, polyester fibers are preferable from the viewpoints of ease of production, balance between performance and cost, use for recycled materials, and the like.
Polyester fibers include polyethylene terephthalate, polybutylene terephthalate, and the like, as well as copolymerized polyesters such as isophthalic acid, adipic acid, diethylene glycol, trimethylene glycol, and polytetramethylene glycol, polyethylene naphthalate, and copolymers thereof. Polymers can also be used. Moreover, it may be a composite fiber such as a core-sheath structure or a side-by-side structure made of these copolymers.
[0008]
Basis weight of the nonwoven fabric to be laminated may be appropriately selected by properties sought is usually 40~500g / m 2, performance, product weight, is 40~200g / m 2 from the relationship of cost preferred.
Although the fineness of a nonwoven fabric fiber is not specifically limited, Usually, it is 1-22 dtex, and 2-17 dtex is preferable from the ease of manufacture.
[0009]
When the nonwoven fabric is a synthetic fiber, it is usually melt-spun to form a web, but if necessary, an openability improving agent at the melt-spinning stage and an antioxidant at the spinning or web-forming stage, Stabilizers, ultraviolet absorbers and the like can be added.
When the nonwoven fabric is not a synthetic fiber or is not thermoplastic, a known hot melt type binder fiber such as polyester, polyamide, or polyethylene can be mixed.
[0010]
The fiber for composite material in the present invention is a fiber for composite material capable of obtaining a reinforcing effect. For example, inorganic fiber such as carbon fiber, mineral fiber, glass fiber, metal fiber, polyaramid, polyether ketone, poly Examples thereof include highly elastic organic fibers such as ether sulfone and polybenzoxazole, and these can be appropriately selected depending on the application. These fibers preferably have a tensile strength of 4.0 g / dtex or more, an elongation of 40% or less, and a 180 ° C. dry heat shrinkage of 3.0% or less. When the tensile strength is less than 4.0 g / dtex, the reinforcing effect is low, and when the 180 ° C. dry heat shrinkage rate exceeds 3.0%, the shrinkage occurs due to thermal history during high-temperature processing such as asphalt processing. However, warping may occur as a processed product.
[0011]
For example, as shown in FIG. 1, the fiber for composite material according to the present invention is wound on a cake, bobbin, reel, etc. and set on a creel stand in a package state 1, and a plurality of fibers for composite material are fed from a creel to a tension guide. (Tension control device) Pulled out through 2 and arranged parallel to each other through the flanges 3 to 5 at a desired interval (pitch) and set so as to be able to travel in the longitudinal direction.
The plurality of fibers for the composite material thus arranged are supplied to the needle punch machine through the ridges 6 to 7 at a constant speed with the drive-type feed nip roll device 8 interposed therebetween.
[0012]
On the other hand, the nonwoven fabric to be laminated is set so that it can be supplied to the needle punch machine from above and below the plurality of fibers for composite material arranged, and is supplied to the needle punch machine.
The nonwoven fabric and the plurality of composite material fibers are superposed on three layers of nonwoven fabric / multiple composite material fibers / nonwoven fabric at a
[0013]
In the present invention, the fiber group for the composite material supplied from the creel can be adjusted to the speed between the feed nip roll and the delivery roll of the needle punch of the next process by being supplied to the drive type feed nip roll device, It is possible to control the tension of the composite material fiber group, and to prevent appearance defects such as warping and bending of the laminate.
Usually, when a nonwoven fabric laminate is needle punched, fibers are caught in the barb of the felting needle and the fibers move in the vertical direction, so that a so-called “width insertion phenomenon” occurs in which the end of the nonwoven fabric laminate is deformed.
For this reason, when the drive-type feed nip roll device is not provided, the tension of the fiber group for the composite material tends to be uncontrollable in the width direction due to the pulling phenomenon generated in the needle punching process. That is, a difference occurs in the processing tension of the composite material fiber group to be laminated, and the operability is deteriorated, and the obtained laminated body is likely to have appearance defects such as warpage and bending.
[0014]
The plurality of fibers for composite material in the present invention are inserted and laminated at predetermined intervals in parallel with the longitudinal direction of the nonwoven fabric, and the insertion pitch is preferably 3 to 30 mm, and more preferably 3 to 10 mm. If the insertion pitch is increased, unevenness is likely to occur on the surface due to shrinkage of the nonwoven fabric after impregnation with asphalt or the like, and if the insertion pitch is reduced, there is no problem in physical properties, but it is uneconomical as the amount of fiber used increases.
[0015]
The needle punching process is performed in order to entangle the insertion yarn and the nonwoven fabric to improve the strength of the laminated nonwoven fabric. The needle density in the needle punching process is preferably 20 to 120 / cm 2 . When the needle density is less than 20 / cm 2 , the confounding property is poor and the lamination effect is difficult to be exhibited. When the needle density exceeds 120 / cm 2 , the unevenness of the surface of the laminated nonwoven fabric increases, or the glass fiber breaks. It tends to happen.
[0016]
If necessary, the laminated nonwoven fabric subjected to the needle punching treatment is then subjected to a thermocompression treatment and / or a resin impregnation treatment.
The purpose of further heat-treating the laminated nonwoven fabric integrated in the needle punching process is to provide rigidity as a base fabric by fixing the fibers on the front and back sides and closely packing the distance between the fibers. As a heat treatment method, it is preferable to perform thermocompression bonding between an embossing roll and a flat calender. By this method, the initial strength reduction can be suppressed and rigidity can be imparted. The linear pressure during processing is preferably 50 to 500 N / cm, more preferably 100 to 300 N / cm. In the case of low linear pressure, the heat-fixing of the two-layer fiber nonwoven fabric is insufficient and it is difficult to obtain rigidity as a base fabric. Moreover, when processed in the region of high linear pressure, the glass fiber inserted in the intermediate layer is cut by the embossing roll, and the initial stress of the obtained base fabric tends to be greatly reduced. Further, in the thermocompression treatment, when a flat / flat calender roll is used, the two-layer nonwoven fabric can be thermocompression-bonded and the distance between fibers can be filled most closely, but the drape is increased.
[0017]
In order to firmly fix the intersection between the fibers of the nonwoven fabric, it is preferable to impregnate the laminated nonwoven fabric obtained by entanglement and integration by needle punching and further heat-compressing the nonwoven fabric with a binder resin. However, when the binder fiber is mixed with a nonwoven fabric, the binder resin impregnation treatment can be omitted.
[0018]
As the binder resin used, known resins such as urea-based, melamine-based, acrylic-based, and epoxy-based thermosetting resins and thermoplastic resins can be used, and these are used in combination as appropriate.
3-50 mass% of a laminated nonwoven fabric is preferable, and, as for the adhesion amount of binder resin, 5-30 mass% is especially preferable. When the adhesion amount of the binder is too large, the impregnation property such as asphalt to be impregnated later is lowered. On the other hand, if the amount is too small, the process tension in the asphalt impregnation process or the like may not always be satisfied, and troubles with breakage and scoring may occur.
[0019]
【Example】
(Example 1)
Polyethylene terephthalate having a melting point of 260 ° C. and an intrinsic viscosity of 0.63 is discharged at a single hole discharge rate of 1.5 g / min / hole and a melting temperature of 285 ° C. using a spinning nozzle with a diameter of 0.30 mm and a spinning speed of 4500 m. After being pulled by an ejector at a minute / minute, cooled and taken up, the resulting fibers were collected on a metal net to form a web. The web was weakly pressed with a thermocompression-bonding roll to obtain a nonwoven fabric. The basis weight of the obtained nonwoven fabric was 70 g / m 2 .
[0020]
Next, the nonwoven fabric obtained by the above production method is placed on the front and back, glass fiber (EC934Z28T30, manufactured by VETROTEX) set on the creel stand is pulled out from the creel, and a tension guide (tension control device) and wrinkles are interposed between Parallel to each other at a pitch of 3 mm, and fed to a neat punch machine at a constant speed with a driven feed nip roll, and the nonwoven fabric obtained by the above production method from above and below the glass fiber group is overlaid, A needle punching machine equipped with a needle needle (FPD 1-40) manufactured by Organ Corp. was subjected to needle punching at a needle density of 60 needles / cm 2 to obtain a laminated nonwoven fabric in which glass fibers were inserted into the intermediate layer. Stable production of the laminated nonwoven fabric was possible, and no warp (waving) was observed at the end of the laminated nonwoven fabric. Next, the laminated nonwoven fabric was subjected to a thermo-thermocompression treatment between an embossing roll at 185 ° C. and a flat calender, followed by impregnation treatment with a mixed resin of urea melamine resin and acrylic resin, to obtain a glass fiber laminated reinforced nonwoven fabric. It shows in Table 1 about the obtained glass fiber laminated reinforcement nonwoven fabric. The obtained glass fiber laminated reinforced non-woven fabric had no glass fiber slack and no warping (waving) at the end of the laminated non-woven fabric.
[0021]
(Comparative Example 1)
In the production method described in Example 1, an attempt was made to produce a laminated nonwoven fabric in the same manner as in Example 1 except that a driven feed nip roll that supplies glass fibers at a constant speed was not used. The glass fiber tension at the end and the center could not be controlled due to the narrowing phenomenon, the glass fiber at the end loosened, the glass fiber was clogged in the heel, etc., thread breakage occurred, and it was not in a state where stable production was possible. Moreover, the obtained laminated nonwoven fabric was warped at the end.
[0022]
[Table 1]
[0023]
【The invention's effect】
According to the present invention, when the reinforcing fiber is cut, it is excellent in workability such as correction, bobbin change, product number switching, etc., and the manufacturing equipment is not excessive, and the composite material fiber group can be easily formed on the nonwoven web or the nonwoven fabric. In addition to being able to be laminated, appearance defects such as warpage and bending in the laminated body can be prevented.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram showing an outline of steps of a method for producing a laminated nonwoven fabric of the present invention.
[Explanation of symbols]
1: Composite fiber material package 2: Tension control device (tension guide)
3-7: 筬 8: Drive type feed nip roll 9: Feed nip roll 10: Deli berry roll
Claims (1)
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| Application Number | Priority Date | Filing Date | Title |
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| JP2001103700A JP3632844B2 (en) | 2001-04-02 | 2001-04-02 | Method for producing laminated nonwoven fabric |
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| JP2001103700A JP3632844B2 (en) | 2001-04-02 | 2001-04-02 | Method for producing laminated nonwoven fabric |
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| JP2002302864A JP2002302864A (en) | 2002-10-18 |
| JP3632844B2 true JP3632844B2 (en) | 2005-03-23 |
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| CN104310091A (en) * | 2014-09-19 | 2015-01-28 | 浙江梅盛实业股份有限公司 | Unreeling device linked with main engine and mounting method thereof |
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| JP5945050B1 (en) * | 2015-03-24 | 2016-07-05 | 株式会社アックスヤマザキ | Sewing a plurality of cloths and a sewing machine therefor |
| CN114734691B (en) * | 2022-05-17 | 2023-09-08 | 福建省远辉纺织科技有限公司 | Production method of composite warp knitted fabric |
| CN114960040A (en) * | 2022-06-08 | 2022-08-30 | 南通大学 | Preparation method of composite non-woven material formed by needling/chemical bonding in synchronization |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310091A (en) * | 2014-09-19 | 2015-01-28 | 浙江梅盛实业股份有限公司 | Unreeling device linked with main engine and mounting method thereof |
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