JPH01162854A - Bulky nonwoven fabric - Google Patents
Bulky nonwoven fabricInfo
- Publication number
- JPH01162854A JPH01162854A JP62319215A JP31921587A JPH01162854A JP H01162854 A JPH01162854 A JP H01162854A JP 62319215 A JP62319215 A JP 62319215A JP 31921587 A JP31921587 A JP 31921587A JP H01162854 A JPH01162854 A JP H01162854A
- Authority
- JP
- Japan
- Prior art keywords
- melting point
- fiber
- heat
- polymer
- nonwoven fabric
- 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
Links
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 29
- 238000002844 melting Methods 0.000 claims abstract description 60
- 230000008018 melting Effects 0.000 claims abstract description 52
- 239000000835 fiber Substances 0.000 claims abstract description 51
- 229920000642 polymer Polymers 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims description 38
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000010354 integration Effects 0.000 claims 1
- 238000010030 laminating Methods 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- VCGRFBXVSFAGGA-UHFFFAOYSA-N (1,1-dioxo-1,4-thiazinan-4-yl)-[6-[[3-(4-fluorophenyl)-5-methyl-1,2-oxazol-4-yl]methoxy]pyridin-3-yl]methanone Chemical compound CC=1ON=C(C=2C=CC(F)=CC=2)C=1COC(N=C1)=CC=C1C(=O)N1CCS(=O)(=O)CC1 VCGRFBXVSFAGGA-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はフィルター等に用いられる嵩高な乾式不織布に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bulky dry nonwoven fabric used for filters and the like.
繊維自身の熱融着を利用した乾式法の不織布では、スパ
ンボンド法に代表される熱ロールを用いたものでは高強
力ではあるが嵩高性が劣り、熱風あるいは赤外線による
加熱法を用いたものでは嵩高性は優れているが不織布強
度が低いという欠点があった。Non-woven fabrics made using a dry method that utilizes the heat fusion of the fibers themselves, those that use hot rolls as typified by the spunbond method, have high strength but are inferior in bulk, while those that use hot air or infrared heating methods do not. Although it has excellent bulkiness, it has the disadvantage of low nonwoven fabric strength.
本発明者は従来の乾式不織布の欠点を解消し嵩高でかつ
高強度の乾式不織布を得るため鋭意研究の結果、融点の
差が１５℃以上ある高融点重合体と低融点重合体とから
成り、低融点重合体が繊維表面の少くとも一部を繊維の
長さ方向に連続して形成している複合繊維（以下熱接着
性複合繊維という）を１５重量％以上含有するウェブと
、上記熱接着性複合繊維を割成する低融点重合体を低融
点成分としこれより１５℃以上高い融点を有する重合体
を高融点成分とし、低融点成分が繊維表面の少くとも一
部を繊維の長さ方向に連続して形成し、繊度が１００〜
１０００デニールの複合モノフィラメントもしくハ複合
マルチフィラメントで作られた網状体（以下複合ネット
という）とを積層し、この積層体を低融点重合体の融点
以上で高融点重合体および高融点成分のいずれの融点よ
呉い温度で押圧することなく熱処理し一体化することに
より、空隙率が９０％以上で不織布強度が３００ ｆ／
（ｆ／１ｒＬ’）以上の乾式不織布が得られることを知
り本発明を完成するに到った。As a result of intensive research, the inventor of the present invention, in order to overcome the drawbacks of conventional dry-laid non-woven fabrics and obtain bulky and high-strength dry-laid non-woven fabrics, has found that they consist of a high-melting point polymer and a low-melting point polymer with a difference in melting point of 15°C or more. A web containing 15% by weight or more of composite fibers (hereinafter referred to as thermal adhesive composite fibers) in which a low melting point polymer forms at least a portion of the fiber surface continuously in the length direction of the fibers, and the above thermal adhesive. A low melting point polymer that makes up the composite fiber is a low melting point component, a polymer having a melting point 15°C or more higher than this is a high melting point component, and the low melting point component covers at least a portion of the fiber surface in the longitudinal direction of the fiber. Continuously formed with a fineness of 100~
A network made of 1000 denier composite monofilament or composite multifilament (hereinafter referred to as composite net) is laminated, and this laminate is heated to a temperature higher than the melting point of the low melting point polymer to either the high melting point polymer or the high melting point component. By heat-treating and integrating without pressing at a temperature below the melting point of
(f/1rL') or more, it was discovered that a dry-laid nonwoven fabric can be obtained, and the present invention was completed.
本発明で用いる熱接着性繊維は結晶性ポリプロピレン／
ポリエチレン、ポリエステル／ポリエチレン、ナイロン
６６／ナイロン６等のように融点の差が１５℃以上ある
重合体から成る並列型あるいは鞘芯型の複合繊維であり
、鞘芯型であれば低融点重合体を鞘側に配することによ
り、低融点重合体が繊維の長さ方向に旦って常に表面の
一部を占めるものである。単糸繊度は特に限定されない
が、不織布に賛求される柔軟性に応じ５０〜３デニ一ル
程度のものが用いられ、不織布を嵩高なものとするため
に自発捲縮あるいは機械捲縮を付与して用いることが好
ましい。The heat-adhesive fiber used in the present invention is crystalline polypropylene/
It is a parallel type or sheath-core type composite fiber made of polymers with a melting point difference of 15°C or more, such as polyethylene, polyester/polyethylene, nylon 66/nylon 6, etc. If it is a sheath-core type, a low melting point polymer is used. By placing it on the sheath side, the low melting point polymer always occupies a portion of the surface along the length of the fiber. The single yarn fineness is not particularly limited, but a denier of about 50 to 3 is used depending on the flexibility desired for the nonwoven fabric, and spontaneous crimp or mechanical crimp is applied to make the nonwoven fabric bulky. It is preferable to use it as
本発明において熱接着性複合繊維はそれ自身単独で、あ
るいは他の繊維と混合してウェブとする。ここで、他の
繊維としては後述の熱処理によって融解や劣化を起さな
い繊維を用いることができ、ポリオレフィン、ポリエス
テル、ポリアミド、レーヨン等の人造繊維あるいけ木綿
、麻、羊毛等の天然繊維が例示できる。このような他の
繊維と混合して用いる場合、繊維混合物中に熱接着性複
合繊維の含有量が１５重ｔ ％未満となると得られる不
織布の強度が不充分となり好ましくない。ウェブの作成
にはカード法、ランダムウエバ％公知の方法による。In the present invention, the thermoadhesive conjugate fiber is used alone or mixed with other fibers to form a web. Here, as other fibers, fibers that do not melt or deteriorate due to the heat treatment described below can be used, and examples thereof include artificial fibers such as polyolefin, polyester, polyamide, and rayon, and natural fibers such as cotton, linen, and wool. can. When used in combination with such other fibers, if the content of the thermoadhesive conjugate fibers in the fiber mixture is less than 15% by weight, the strength of the obtained nonwoven fabric will be insufficient, which is not preferable. The web is created using a card method or a known random web method.
本発明で用いる複合ネットは単糸繊度１００〜１０００
デニールの複合モノフィラメントもしくは践繊度１００
〜１０００デニールの複合マルチフィラメントで構成さ
れる。これら複合モノフィラメントもしくは複合マルチ
フィラメントを網状体とする方法としては公知の編機や
織機による方法の他低融点成分の熱す着を利用する方法
がいずれも利用できる。The composite net used in the present invention has a single yarn fineness of 100 to 1000.
Denier composite monofilament or fineness 100
Constructed of ~1000 denier composite multifilament. As a method for making these composite monofilaments or composite multifilaments into a network, any method using a known knitting machine or loom, or a method using a hot bonding of a low melting point component can be used.
複合モノフィラメントあるいは複合マルチフィラメント
は、熱接着性繊維を構成する低融点重合体を低融点放物
とし、これより１５℃以上高い融点を有する重合体を高
融点成分とし、低融点成分が繊維成分の少くとも一部を
繊維の長さ方向に連続して形成するようにｉ合紡糸して
得られる。複合モノフィラメントの単糸繊度あるいは８
合マルチフィラメントの総繊贋が１００デニール未満で
は不織布の補強効果が小さく、１０００デニールを超す
と面積当りの重量が増し経済的でないのでいずれも好ま
しくない。Composite monofilament or composite multifilament is made by using a low melting point polymer that constitutes the thermoadhesive fiber as a low melting point paraboloid, a polymer having a melting point higher than this by 15°C or more as a high melting point component, and a low melting point component as a fiber component. It is obtained by i-combination spinning so that at least a part of the fiber is formed continuously in the length direction. Single yarn fineness of composite monofilament or 8
If the total fiber count of the composite multifilament is less than 100 denier, the reinforcing effect of the nonwoven fabric will be small, and if it exceeds 1000 denier, the weight per area will increase, making it uneconomical.
上記熱接着性複合繊維を含有するウェブと複合ネットと
を積層した積層体はこれに押圧を加えることなく熱処理
をする。積層はウェブおよび複合ネット各−層であって
も、多層であっても良い。熱処理は熱接着複合繊維を構
成する低融点重合体（複合ネットを構成する低融点成分
）の融点以上で、かつ、熱接着性複合繊維を構成する高
融重合体の融点および複合ネットを構成する高融点成分
の融点のいずれよりも低い温度で行う。このような温度
を用いることにより、熱接着性複合繊維はその形状を保
持したままその低融点重合体の融着によりウェブ中での
繊維同志の接点を固定するとともに、複合ネットとも共
通の低融点重合体の融着により、押圧されることなしに
、強固に融着する。このような熱処理をする手段として
は熱風循還式加熱炉が使用でき、中でもサクションドラ
イヤーは高速連続処理が可能であるので好ましく用いら
れる。The laminate obtained by laminating the web containing the heat-adhesive conjugate fibers and the composite net is heat-treated without applying pressure thereto. Laminations can be individual layers or multiple layers of webs and composite nets. The heat treatment is performed at a temperature equal to or higher than the melting point of the low-melting point polymer (low-melting point component that makes up the composite net) that makes up the heat-adhesive composite fibers, and at a temperature that is equal to or higher than the melting point of the high-melting polymer that makes up the heat-adhesive composite fibers and the composite net. It is carried out at a temperature lower than any of the melting points of the high melting point components. By using such a temperature, the thermoadhesive composite fibers maintain their shape and fix the contact points between fibers in the web by fusing the low melting point polymer, and also maintain the same low melting point as the composite net. Due to the fusion of polymers, it is firmly fused without being pressed. As a means for carrying out such heat treatment, a hot air circulation heating furnace can be used, and among them, a suction dryer is preferably used because it enables high-speed continuous treatment.
実施例により本発明を更に具体的に説明する。 The present invention will be explained in more detail with reference to Examples.
なお各例中で用いた物性値の測定方法は以下の通りであ
る。The methods for measuring physical property values used in each example are as follows.
空隙率：体積１ｏｏ−当りの不織布重量をａとし、
１ｏｏ−ａ＝空隙率 とした。Porosity: the weight of the nonwoven fabric per 100 volume is a,
1oo-a=porosity.
不織布強カニ ＪＩＳ Ｌ １０８５ （不織布芯地
試験方法）の引張強さの測定方法に準じ、幅５α長さ２
０αの試験片５枚を採取し、引張試験を用い、つかみ間
隔１０ｃＩｎ１引張速度１０σ／ｍｉｎで引張り、破断
強度Ｃｋｇ１５Ｃｍ幅）の平均値を求めた。Non-woven fabric strength according to JIS L 1085 (Non-woven fabric interlining test method) tensile strength measurement method, width 5 α length 2
Five test pieces of 0α were taken and subjected to a tensile test at a gripping interval of 10cIn1 and a tensile speed of 10σ/min to determine the average value of the breaking strength (Ckg and width of 15Cm).
不織布強度：不織布強力を目付（ｙ／ｍ’）で除した値
実施例１
結晶性ポリプロピレン（融点１６５℃）を芯成分とし、
高密度ポリエチレン（融点１３０℃）を鞘成分とし複合
比５０１５０、単糸繊度３００デニールの複合モノフィ
ラメントを用い縦、横各１０本／２５ｎの平織組織の複
合ネットを作った。Nonwoven fabric strength: value obtained by dividing the nonwoven fabric strength by the basis weight (y/m') Example 1 Crystalline polypropylene (melting point 165°C) is used as a core component,
A composite net with a plain weave structure of 10 pieces/25 nm each in length and width was made using composite monofilaments with high density polyethylene (melting point 130° C.) as a sheath component, composite ratio 50150, and single fiber fineness 300 denier.
結晶性ポリプロピレン（融点１６５℃）と高密度ポリエ
チレン（融点１３５℃）とを並列型に配し複合比５０１
５０で紡糸し、延伸および熱処理により１２山／ ２５
Ｉｍの自発捲縮を有する単糸繊度１．５デニール、繊
維長５１＋ｎの熱接着性複合繊維を得た。Crystalline polypropylene (melting point 165°C) and high-density polyethylene (melting point 135°C) are arranged in parallel to create a composite ratio of 501.
Spun at 50, stretched and heat treated to create 12 threads/25
A heat-adhesive conjugate fiber having a spontaneous crimp of Im, a single yarn fineness of 1.5 denier, and a fiber length of 51+n was obtained.
この熱接着性複合繊維を目付３０ｆ／ｆｉ’のカードウ
ェブとし、前記複合ネット上に積層し、サクションドラ
イヤーを用いて１４０℃で３０秒間熱処理して不織布と
した。このものの物性値を第１表に示した。This heat-adhesive composite fiber was made into a card web with a basis weight of 30 f/fi', laminated on the composite net, and heat-treated at 140° C. for 30 seconds using a suction dryer to obtain a nonwoven fabric. The physical properties of this product are shown in Table 1.
比較例１．２
実施例１で用いた熱接着性複合繊維を目付６０ｆ／ｍ’
のカードウェブとし、複合ネットと積層せずに、サクシ
ョンドライヤーで１４０℃３０秒間熱処理して嵩高の不
織布を得た。Comparative Example 1.2 The heat-adhesive composite fiber used in Example 1 had a basis weight of 60 f/m'
This card web was heat-treated at 140° C. for 30 seconds in a suction dryer without being laminated with a composite net to obtain a bulky nonwoven fabric.
比較例１においてはウェブは押圧をせず、比較例２にお
いてはサクションドライヤーで熱処理後、金属ロールで
軽い押圧を加えて空隙率を調節した。これらの不織布の
物性を第１表に示した。In Comparative Example 1, the web was not pressed, and in Comparative Example 2, after heat treatment with a suction dryer, light pressing was applied with a metal roll to adjust the porosity. The physical properties of these nonwoven fabrics are shown in Table 1.
参考例１１２
市販のナイロンスパンボンド不織布の物性を測定し、第
１表に併せ表示した。Reference Example 112 The physical properties of a commercially available nylon spunbond nonwoven fabric were measured and are also shown in Table 1.
第１表
＊ｋｇ１５α幅
＊＊ ｐ／（ｆ／ｍ’）
比較例１および２のデータから、熱ロール等による押圧
の無い状態で熱処理された不織布では空隙率は大きなも
のとなるが不織布強力が低く 、ｇ前例１および２の如
く熱ロールＫ ヨ１，１ 熱処理された不織布は不織布
強度は大きくなるが空隙率や厚みが小さなものしか得ら
れないことが分る。Table 1 * kg 15α width ** p/(f/m') From the data of Comparative Examples 1 and 2, the porosity of the nonwoven fabric heat-treated without being pressed by a hot roll or the like increases, but the strength of the nonwoven fabric decreases. It can be seen that heat-treated nonwoven fabrics such as Examples 1 and 2 have a high nonwoven strength but only a small porosity and thickness.
一方、実施例１に示されたように本発明の不織布は、ウ
ェブ内の繊維同志が熱接着性繊維により接着されている
のみならず、ウェブと複合ネットとが同一種の重合体の
融着により接合されているために、押圧なしで熱処理さ
れているにもかかわらず複合ネットによる補強効果が有
効に発揮され、嵩高性と高強度を兼ね備えている。On the other hand, as shown in Example 1, in the nonwoven fabric of the present invention, not only the fibers in the web are bonded together by thermal adhesive fibers, but also the web and the composite net are made of the same type of polymer fused together. Because the composite net is bonded with , the reinforcing effect of the composite net is effectively demonstrated even though it is heat treated without pressing, and it has both bulkiness and high strength.
以 上
將許出願人 チ ッ ソ 株 式 会 社代理人 弁
理士 佐々井 彌太部
同上 野中克彦Applicant for the above patent Chisso Co., Ltd. Company agent Patent attorney Yatabe Sasai Same as above Katsuhiko Nonaka
Claims (1)
点重合体とから成り、低融点重合体が繊維表面の少くと
も一部を繊維の長さ方向に連続して形成している複合繊
維（以下熱接着性複合繊維という）を１５重量％以上含
有するウエブと、上記熱接着性複合繊維を構成する低融
点重合体を低融点成分としこれより１５℃以上高い融点
を有する重合体を高融点成分とし、低融点成分が繊維表
面の少くとも一部を繊維の長さ方向に連続して形成し、
繊度が １００〜１０００デニールの複合モノフイラメントもし
くは複合マルチフイラメントで作られた網状体（以下複
合ネツトという）とを積層し、この積層体を低融点重合
体の融点以上で高融点重合体および高融点成分のいずれ
の融点よりも低い温度で押圧することなく熱処理し一体
化することにより得られる、空隙率が９０％以上で不織
布強力が３００ｇ／（ｇ／ｍ＾２）以上の不織布。(1) Consists of a high melting point polymer and a low melting point polymer with a melting point difference of 15°C or more, and the low melting point polymer forms at least a portion of the fiber surface continuously in the length direction of the fiber. A web containing 15% by weight or more of conjugate fibers (hereinafter referred to as heat-adhesive conjugate fibers), and a polymer having a melting point 15°C or more higher than the low-melting-point polymer comprising the above-mentioned heat-adhesive conjugate fibers as a low-melting point component. is a high melting point component, and a low melting point component forms at least a part of the fiber surface continuously in the length direction of the fiber,
A net made of a composite monofilament or a composite multifilament having a fineness of 100 to 1000 deniers (hereinafter referred to as a composite net) is laminated, and this laminate is heated to a temperature higher than the melting point of the low melting point polymer to form a high melting point polymer and a high melting point polymer. A nonwoven fabric with a porosity of 90% or more and a nonwoven fabric strength of 300g/(g/m^2) or more, obtained by heat treatment and integration without pressing at a temperature lower than the melting point of any of the components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62319215A JPH01162854A (en) | 1987-12-17 | 1987-12-17 | Bulky nonwoven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62319215A JPH01162854A (en) | 1987-12-17 | 1987-12-17 | Bulky nonwoven fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01162854A true JPH01162854A (en) | 1989-06-27 |
Family
ID=18107696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62319215A Pending JPH01162854A (en) | 1987-12-17 | 1987-12-17 | Bulky nonwoven fabric |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01162854A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH042624U (en) * | 1990-04-21 | 1992-01-10 | ||
| JPH0413339U (en) * | 1990-05-25 | 1992-02-03 |
-
1987
- 1987-12-17 JP JP62319215A patent/JPH01162854A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH042624U (en) * | 1990-04-21 | 1992-01-10 | ||
| JPH0413339U (en) * | 1990-05-25 | 1992-02-03 |
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