JP2000073269A - Wall finishing material - Google Patents

Wall finishing material

Info

Publication number
JP2000073269A
JP2000073269A JP24125898A JP24125898A JP2000073269A JP 2000073269 A JP2000073269 A JP 2000073269A JP 24125898 A JP24125898 A JP 24125898A JP 24125898 A JP24125898 A JP 24125898A JP 2000073269 A JP2000073269 A JP 2000073269A
Authority
JP
Japan
Prior art keywords
mol
vinyl acetate
nonwoven fabric
surface layer
melt
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.)
Pending
Application number
JP24125898A
Other languages
Japanese (ja)
Inventor
Takeshi Konishi
武四 小西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuraray Co Ltd
Original Assignee
Kuraray Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kuraray Co Ltd filed Critical Kuraray Co Ltd
Priority to JP24125898A priority Critical patent/JP2000073269A/en
Publication of JP2000073269A publication Critical patent/JP2000073269A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a wall finishing material that has the surface layer of excellent air permeability, resistance to staining, cellulose fiber-like touch and good appearance. SOLUTION: This wall-finishing material mainly comprises a saponified ethylene-vinyl acetate copolymer having an ethylene content of 40-60 mol.%, a degree of saponification of the vinyl acetate of >=85 mol.% and an intrinsic viscosity [η] of 0.055-0.085 (l/g) and is produced by melt-blowing the saponified polymer into a nonwoven fabric with an average fiber diameter of <=10 microns and using it as the surface layer.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は優れた表面層を有する壁
装材に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall covering having an excellent surface layer.

【0002】[0002]

【従来の技術】壁装材としては、従来、塩ビシート、織
物或いは紙などが多く用いられている。この中で塩ビシ
ートは、加工性、経済性などに優れていて広く用いられ
ているが、一方で、該シート中に含まれている可塑剤の
ブリードによる汚染、カビ等種々の障害が発生する欠点
がある。また、織物などの繊維質のものは、暖かみのあ
る触感や外観等の高級感があり、結露、カビなどの欠点
も生じないので一部高級品として使用されされている
が、その毛羽立ちの多い表面状態からホコリを吸着し易
く汚れ易い欠点があり、かつ一旦付着した汚れは除去し
難いという問題がある。紙タイプのものは、安価で手軽
に使用出来るが、ボリューム感に欠け、また手入れもし
難い欠点がある。
2. Description of the Related Art As a wall covering material, a PVC sheet, a woven fabric, a paper, or the like is conventionally used in many cases. Among them, the PVC sheet is excellent in workability, economical efficiency and the like, and is widely used, but on the other hand, various obstacles such as contamination by bleeding of a plasticizer contained in the sheet and mold are generated. There are drawbacks. In addition, fibrous materials such as woven fabrics have a high-grade feel such as warm touch and appearance, and do not cause defects such as condensation and mold. There is a drawback that dust is easily adsorbed and easily stained from the surface state, and that once adhered, it is difficult to remove the stain. Paper-type ones are inexpensive and easy to use, but have the disadvantage of lacking volume and being difficult to maintain.

【0003】[0003]

【発明が解決しようとする課題】本発明は、前記のよう
な問題を解決しようとするものであり、通気性、防汚性
に優れ、セルローズ系繊維に類似した触感と外観の優れ
た表面層を備えた壁装材を提供することを目的とするも
のである。
SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and has an excellent air permeability and antifouling property, and a surface layer having an excellent touch and appearance similar to cellulose fibers. It is an object of the present invention to provide a wall covering provided with:

【0004】[0004]

【課題を解決するための手段】本発明者は上記の課題を
種々検討した結果、特定の物性範囲にあるエチレン−酢
酸ビニル共重合体ケン化物からなるメルトブローン不織
布を壁装材の表面層に用いることにより、その課題が解
決できることを見出した。すなわち、本発明は、エチレ
ン含有量が40〜60モル%、酢酸ビニルケン化度が8
5モル%以上で、かつ固有粘度〔η〕が0.055〜
0.085(l/g)の範囲にあるエチレン−酢酸ビニ
ル共重合体ケン化物を主体とした重合体からなり、平均
繊維直径が10ミクロン以下の極細繊維からなるメルト
ブローン不織布を表面層とする壁装材である。
As a result of various studies on the above problems, the present inventor has found that a melt blown nonwoven fabric made of a saponified ethylene-vinyl acetate copolymer having a specific physical property range is used for the surface layer of the wall covering material. As a result, it has been found that the problem can be solved. That is, in the present invention, the ethylene content is 40 to 60 mol%, and the degree of saponification of vinyl acetate is 8
5 mol% or more and intrinsic viscosity [η] is 0.055 to
A wall made of a melt-blown nonwoven fabric made of a polymer mainly composed of a saponified ethylene-vinyl acetate copolymer having a mean fiber diameter of 10 μm or less and having a surface layer of 0.085 (l / g). Equipment.

【0005】この壁装材は、上記メルトブローン不織布
を表面層とし、他の壁装素材と積層ラミネートして一体
化し、必要ならばエンボスなどの最終加工を施すことに
よって得られる。
[0005] This wall covering material is obtained by using the above-mentioned melt blown nonwoven fabric as a surface layer, laminating and laminating it with another wall covering material, integrating it, and performing a final processing such as embossing if necessary.

【0006】本発明に用いるエチレン−酢酸ビニル共重
合体鹸化物を主体とした重合体からなるメルトブローン
不織布は、特に壁装用表面層として以下の通りの優れた
特性を有する。すなわち、 (1)低帯電性:ポリマー中に親水基を持っているため
帯電性が低く帯電減衰時間が早い。これはホコリ等が付
着し難いことを示す、 (2)耐汚染性:溶解性パラメータが大きく、汚染物質
の付着や内部への浸透が少ない。また、汚れは洗剤など
で簡単に除去出来る、 (3)印刷適性、エンボス適性:特別な表面処理を施す
ことなく良好な印刷が出来る。また、成型収縮率が小さ
いためエンボス加工性に優れる、 (4)手触り、外観:繊維状に加工した場合、他の合成
繊維と比較してセルロース系繊維により類似した手触
り、外観等を有する、との特性を有するものであり、該
メルトブローン不織布を表面層として用いた本発明の壁
装材はその特性を維持し発揮できる優れたものである。
The melt blown nonwoven fabric comprising a polymer mainly composed of a saponified ethylene-vinyl acetate copolymer used in the present invention has the following excellent properties particularly as a surface layer for wall covering. (1) Low chargeability: Since the polymer has a hydrophilic group, the chargeability is low and the charge decay time is short. This indicates that dust and the like are unlikely to adhere. (2) Stain resistance: The solubility parameter is large, and the adhesion of contaminants and the penetration into the inside are small. Further, dirt can be easily removed with a detergent or the like. (3) Suitability for printing and embossing: Good printing can be performed without performing special surface treatment. In addition, it is excellent in embossability due to a small molding shrinkage ratio. (4) Touch and appearance: When processed into a fibrous form, it has a similar touch and appearance to cellulosic fibers as compared to other synthetic fibers. The wall covering material of the present invention using the melt blown nonwoven fabric as a surface layer is an excellent material capable of maintaining and exhibiting the characteristics.

【0007】エチレン−ビニルアルコール系共重合体を
繊維状の壁装表面層として用いることは、通気性がある
ことによる結露防止、防カビ効果等の点から望ましく、
また暖かく高級感のある触感、外観等を付与する点から
も好ましいものである。特にこの場合、平均繊維直径が
10ミクロン以下の極細繊維からなる、いわゆるメルト
ブローン不織布が望ましい。これは、壁装表面層の繊維
径をより細くし、全体をより緻密な構造とすることによ
って、ホコリなど汚染物の内部への浸透が妨げられ、ま
たカレンダー加工による表面処理によって毛羽がより完
全に押えられ、平滑な表面層が形成されるので、汚れが
付着し難く除去し易い状態が得られるからである。同時
に、より少ない繊維目付でもより均質な被覆性が発現さ
れるので経済的でもあるからである。
The use of an ethylene-vinyl alcohol copolymer as a fibrous wall covering surface layer is desirable from the viewpoints of dew condensation prevention and mold prevention effect due to air permeability.
It is also preferable from the viewpoint of imparting a warm, high-grade touch, appearance, and the like. Particularly in this case, a so-called melt blown nonwoven fabric made of ultrafine fibers having an average fiber diameter of 10 microns or less is desirable. This is because the fiber diameter of the wall covering surface layer is made thinner and the entire structure is made denser, so that the penetration of contaminants such as dust into the inside is prevented. And a smooth surface layer is formed, so that a state is obtained in which dirt hardly adheres and is easily removed. At the same time, even with a smaller fiber basis weight, more uniform coating properties are exhibited, which is economical.

【0008】本発明で用いるメルトブローン不織布で、
その均一性の良好な不織布を製造するのに適したエチレ
ン−酢酸ビニル共重合体鹸化物は、特定の物性範囲にあ
る重合体を使用することが好ましい。まず、共重合体中
のエチレン含有量は40〜60モル%の範囲であること
である。エチレン含有量が40モル%未満である場合に
は、重合体の熱安定性が悪くなり、溶融粘度が上昇し、
不溶融性物(ゲル状物)が発生して安定なメルトブロー
ン法紡糸ができないとか、良好な繊維流の形成が得られ
ないとか、不織布中に未溶粒物などの粒状物の混入が多
くなる。一方、エチレン含有量が60モル%を越えて多
くなると、ポリビニルアルコール特有の触感、親水性、
印刷性、防汚性が低下し、さらに、不織布の触感がポリ
オレフイン様あるいはワックス様の好ましくないものと
なる。
[0008] The melt blown nonwoven fabric used in the present invention,
As a saponified ethylene-vinyl acetate copolymer suitable for producing a nonwoven fabric having good uniformity, it is preferable to use a polymer having a specific physical property range. First, the ethylene content in the copolymer is in the range of 40 to 60 mol%. If the ethylene content is less than 40 mol%, the thermal stability of the polymer becomes poor, the melt viscosity increases,
Unmeltable substances (gel-like substances) are generated and stable melt blown spinning cannot be performed, good fiber flow cannot be formed, or particulate matter such as undissolved particles increases in the nonwoven fabric. . On the other hand, when the ethylene content exceeds 60 mol%, the feel, hydrophilicity, and
The printability and the antifouling property are reduced, and the touch of the nonwoven fabric becomes unfavorable, such as polyolefin or wax.

【0009】また、該共重合体の重合度もメルトブロー
ン法の紡糸性に大きな影響をもたらす。すなわち、本発
明で使用するエチレン−酢酸ビニル共重合体鹸化物の溶
液で測定して求めた固有粘度〔η〕は0.055〜0.
085(l/g)の範囲である。そして、該重合体の固
有粘度〔η〕が0.055(l/g)未満では溶融粘度
が小さくて、十分な曳糸性が得られず、良好な繊維流を
形成することができないために、均一性の良い不織布が
得られないとか、不織布中に微小な玉状物が多数混入す
るとか、不織布の強力が低く、腰がなくなるとか、耐熱
性が低下するなどのために実用性に乏しい不織布とな
る。一方、該重合体の固有粘度〔η〕が0.085(l
/g)を越えて高粘度になると、メルトブローン法では
十分に細化、配向した繊維の繊維流を形成することがで
きないため、均一性の良い不織布を得ることができず、
得られた不織布は強力が弱く、風合いの粗硬なものとな
ってしまう。
[0009] The degree of polymerization of the copolymer also greatly affects the spinnability of the melt blown method. That is, the intrinsic viscosity [η] determined by measuring the solution of the saponified ethylene-vinyl acetate copolymer used in the present invention is 0.055 to 0.5.
085 (l / g). If the intrinsic viscosity [η] of the polymer is less than 0.055 (l / g), the melt viscosity is small, sufficient spinnability cannot be obtained, and a good fiber flow cannot be formed. Poor practicality due to poor uniformity of non-woven fabric, non-woven fabric containing many fine balls, low strength of non-woven fabric, loss of rigidity, reduced heat resistance, etc. It becomes a non-woven fabric. On the other hand, the intrinsic viscosity [η] of the polymer is 0.085 (l
/ G), it becomes impossible to obtain a nonwoven fabric having good uniformity because the melt blown method cannot form a sufficiently thin and oriented fiber flow.
The obtained non-woven fabric has a low strength and a rough texture.

【0010】さらに、該重合体中の酢酸ビニルの鹸化度
は85モル%以上であることが好ましい。鹸化度が85
モル%に満たない重合体ではポリビニルアルコールの特
性、すなわち、不織布として所望する触感、腰のある風
合いが得られないものとなる。従って、本発明のメルト
ブローン法でエチレン−酢酸ビニル共重合体鹸化物を主
体とした重合体の不織布を製造するに際し、エチレン−
酢酸ビニル共重合体鹸化物は、エチレン含有量40〜6
0モル%、固有粘度〔η〕が0.055〜0.085
(l/g)にある重合体を用いることにある。そして、
メルトブローン紡糸温度250〜300℃、搬送気体圧
力(ゲージ圧力)0.5〜5(kg/cm2)の条件下
にメルトブローン法で紡糸することによって、平均繊維
直径10ミクロン以下の極細繊維が得られ、均一性の良
好な繊維流を形成することができる。この繊維流をコン
ベアーネット上にシート状に捕集することによって、広
幅であっても均一性の良好な不織布とすることができ
る。
Further, the degree of saponification of vinyl acetate in the polymer is preferably at least 85 mol%. Degree of saponification 85
If the amount of the polymer is less than mol%, the characteristics of polyvinyl alcohol, that is, the desired tactile sensation and stiff feel desired for a nonwoven fabric cannot be obtained. Therefore, when producing a nonwoven fabric of a polymer mainly comprising a saponified ethylene-vinyl acetate copolymer by the melt blown method of the present invention, ethylene-
The saponified vinyl acetate copolymer has an ethylene content of 40 to 6
0 mol%, intrinsic viscosity [η] is 0.055 to 0.085
(L / g). And
By spinning with a melt blown method under the conditions of melt blown spinning temperature of 250 to 300 ° C. and carrier gas pressure (gauge pressure) of 0.5 to 5 (kg / cm 2 ), ultrafine fibers having an average fiber diameter of 10 μm or less can be obtained. And a fiber stream having good uniformity can be formed. By collecting this fiber stream in a sheet shape on a conveyor net, a nonwoven fabric having good uniformity even if it is wide can be obtained.

【0011】エチレン−ビニルアルコール共重合体をメ
ルトブローン紡糸するに際し、表面層の透明度合を調節
する目的で酸化チタンなどの充填剤を混入することも出
来る。また、着色剤としての顔料等を分散混合しておく
ことも出来る。
In melt-blown spinning of the ethylene-vinyl alcohol copolymer, a filler such as titanium oxide can be mixed for the purpose of adjusting the transparency of the surface layer. Further, a pigment or the like as a colorant can be dispersed and mixed.

【0012】メルトブローン不織布は、その表面の毛羽
立ちを押え、平滑にするためにカレンダー処理を施すこ
とができる。カレンダーのロール温度は、シートのフイ
ルム化を防ぐために重合体の溶融温度より少なくとも3
0℃以上低くする必要がある。カレンダー処理後に、必
要ならば不織布の表面あるいは裏面に印刷などの着色を
施すこともできる。
The melt blown nonwoven fabric can be subjected to a calendering treatment in order to suppress the fuzz on the surface and to smooth the surface. The calender roll temperature should be at least three times higher than the polymer melting temperature to prevent sheet filming.
It is necessary to lower the temperature by 0 ° C. or more. After the calendering treatment, if necessary, the surface or the back surface of the nonwoven fabric may be colored by printing or the like.

【0013】かくして得られたメルトブローン不織布か
ら成る壁装表面層は、他の素材すなわち難燃紙などの裏
打紙及び必要ならば他の通気性を有する不織布などの中
間層と積層し、ラミネートで一体化して所望の最終壁装
材とする。この場合、エンボス等の処理を施こしても良
い。
The wall covering surface layer made of the melt-blown non-woven fabric thus obtained is laminated with another material, that is, a backing paper such as a flame-retardant paper and, if necessary, another intermediate layer such as a non-woven fabric having air permeability, and is integrally laminated. Into the desired final wall covering. In this case, processing such as embossing may be performed.

【0014】[0014]

【実施例】以下、本発明をその実施例によって説明する
が、本発明はこの実施例によつて限定されるものではな
い。
The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

【0015】実施例1:エチレン含有量49モル%、鹸
化度98モル%、固有粘度〔η〕=0.062(l/
g)のエチレン−酢酸ビニル共重合体鹸化物をエクスト
ルーダーで溶融し、これをメルトブローン用ダイに導入
し、メルトブローン紡糸を行った。
Example 1 Ethylene content 49 mol%, degree of saponification 98 mol%, intrinsic viscosity [η] = 0.62 (l /
g) The saponified ethylene-vinyl acetate copolymer was melted by an extruder, introduced into a melt blown die, and melt blown.

【0016】メルトブローン用ダイは、直径0.3mm
の吐出孔を1mm間隔で一列に配列したノズル部と、そ
の両側に幅0.25mmの気体噴出用スリットを設けた
ダイを用いた。
The melt blown die has a diameter of 0.3 mm.
And a die provided with slits for gas ejection having a width of 0.25 mm on both sides thereof.

【0017】メルトブローン紡糸は、溶融紡糸温度28
0℃、孔当たりの吐出量0.2(g/分)で吐出させ、
搬送空気温度280℃、空気ゲージ圧1(kg/c
2)の条件で紡糸し、紡出極細繊維流はダイより約2
5cmの位置に設置した、一定速度で走行するベルトコ
ンベアーネット捕集機のネット上に捕集して、平均目付
15(g/m2)のメルトブローン不織布を得た。
Melt blown spinning has a melt spinning temperature of 28.
Discharge at 0 ° C., discharge rate per hole 0.2 (g / min),
Transfer air temperature 280 ° C, air gauge pressure 1 (kg / c
m 2 ), and the spun ultrafine fiber stream is about 2
It was collected on a net of a belt conveyor net collector installed at a position of 5 cm and running at a constant speed to obtain a melt-blown nonwoven fabric having an average basis weight of 15 (g / m 2 ).

【0018】このメルトブローン不織布は、それを、ロ
ール温度100℃、線圧力3(kg/cm)、処理速度
10m/分の条件下でカレンダー機でプレス処理を行い
表面平滑なシートとした。次でこのシートの裏面にグラ
ビア印刷を行い花柄模様の表面層を得た。
This melt blown nonwoven fabric was subjected to press treatment with a calender under the conditions of a roll temperature of 100 ° C., a linear pressure of 3 (kg / cm) and a treatment speed of 10 m / min to obtain a sheet having a smooth surface. Next, gravure printing was performed on the back surface of this sheet to obtain a surface layer having a floral pattern.

【0019】一方、単繊維繊度3デニール、繊維長51
mmカットのレーヨン100%からなる目付30(g/
2)のカードウエブを通常の方法で水流絡合処理した
スパンレース不織布を準備し、エチレン−酢酸ビニル樹
脂エマルジョンに含浸、乾燥して樹脂加工を行った。付
着樹脂量は繊維重量比で15%であった。また、裏打紙
としては目付50(g/m2)の難燃紙を準備した。
On the other hand, single fiber fineness 3 denier, fiber length 51
Weight of 30% (g /
A spunlaced nonwoven fabric obtained by subjecting the card web of m 2 ) to a hydroentanglement treatment by an ordinary method was prepared, impregnated with an ethylene-vinyl acetate resin emulsion, dried, and processed with a resin. The amount of adhered resin was 15% by fiber weight ratio. In addition, a flame-retardant paper having a basis weight of 50 (g / m 2 ) was prepared as the backing paper.

【0020】上記の、裏面に印刷されたメルトブローン
不織布、スパンレース不織布および難撚紙の順に積層
し、相互を接着して一体化した後、四角形凸柄模様のエ
ンボスカレンダー機でエンボス処理を行った。
The above-described melt-blown nonwoven fabric, spunlace nonwoven fabric, and non-twisted paper printed on the back surface are laminated in this order, bonded together and integrated, and then embossed with an emboss calender having a square convex pattern. .

【0021】得られた壁装材は、表面がセルロース系繊
維状の手触りと外観とを有し、通気性、防汚性に優れた
製品であった。
The obtained wall covering material had a cellulosic fibrous feel and appearance and was excellent in air permeability and antifouling property.

【0022】[0022]

【発明の効果】本発明による壁装材は、その優れた組成
と構造によってなる表面層によって、次の如き特徴を有
する。すなわち、 (1)帯電防止性、防汚性に優れるため汚れが付着しに
くく、また除去が容易である。 (2)通気性があるため結露防止、防カビ効果に優れ
る。 (3)表面がセルロース系繊維に類似した高級感のある
触感と外観とを有する。
The wall covering according to the present invention has the following features due to the surface layer having excellent composition and structure. (1) Dirt is hardly adhered because of its excellent antistatic property and antifouling property, and it is easy to remove. (2) Since it has air permeability, it has excellent dew condensation prevention and antifungal effects. (3) The surface has a high-class touch and appearance similar to cellulosic fibers.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】エチレン含有量が40〜60モル%、酢酸
ビニル鹸化度が85モル%以上で、かつ固有粘度〔η〕
が0.055〜0.085(l/g)の範囲にあるエチ
レン−酢酸ビニル共重合体鹸化物を主体とした重合体か
らなり、平均繊維直径が10ミクロン以下の極細繊維か
らなるメルトブローン不織布を表面層とする壁装材。
An ethylene content of 40 to 60 mol%, a saponification degree of vinyl acetate of 85 mol% or more, and an intrinsic viscosity [η].
A melt-blown non-woven fabric made of a polymer mainly composed of a saponified ethylene-vinyl acetate copolymer having an average fiber diameter of 10 μm or less and having a range of 0.055 to 0.085 (l / g). Wall covering used as surface layer.
JP24125898A 1998-08-27 1998-08-27 Wall finishing material Pending JP2000073269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24125898A JP2000073269A (en) 1998-08-27 1998-08-27 Wall finishing material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24125898A JP2000073269A (en) 1998-08-27 1998-08-27 Wall finishing material

Publications (1)

Publication Number Publication Date
JP2000073269A true JP2000073269A (en) 2000-03-07

Family

ID=17071577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24125898A Pending JP2000073269A (en) 1998-08-27 1998-08-27 Wall finishing material

Country Status (1)

Country Link
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003127288A (en) * 2001-10-19 2003-05-08 Daiwabo Co Ltd Surface layer material, wallpaper, and its production method
JP2006009182A (en) * 2004-06-24 2006-01-12 Asahi Kasei Fibers Corp Highly water pressure-resistant polyester nonwoven fabric excellent in resistance to fluff
WO2006018969A1 (en) * 2004-08-02 2006-02-23 Kuraray Co., Ltd. Multilayer sheet
CN105683434A (en) * 2013-10-29 2016-06-15 东洋纺株式会社 Network structure having excellent durability against compression

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003127288A (en) * 2001-10-19 2003-05-08 Daiwabo Co Ltd Surface layer material, wallpaper, and its production method
JP2006009182A (en) * 2004-06-24 2006-01-12 Asahi Kasei Fibers Corp Highly water pressure-resistant polyester nonwoven fabric excellent in resistance to fluff
JP4494094B2 (en) * 2004-06-24 2010-06-30 旭化成せんい株式会社 High water pressure resistant polyester nonwoven fabric with excellent fuzz resistance
WO2006018969A1 (en) * 2004-08-02 2006-02-23 Kuraray Co., Ltd. Multilayer sheet
CN105683434A (en) * 2013-10-29 2016-06-15 东洋纺株式会社 Network structure having excellent durability against compression

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