JPH02289159A - 柔軟な長繊維不織布 - Google Patents
柔軟な長繊維不織布Info
- Publication number
- JPH02289159A JPH02289159A JP1104980A JP10498089A JPH02289159A JP H02289159 A JPH02289159 A JP H02289159A JP 1104980 A JP1104980 A JP 1104980A JP 10498089 A JP10498089 A JP 10498089A JP H02289159 A JPH02289159 A JP H02289159A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- component
- mfr
- astm
- random copolymer
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 43
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 41
- -1 polypropylene Polymers 0.000 claims abstract description 26
- 229920005604 random copolymer Polymers 0.000 claims abstract description 14
- 239000004743 Polypropylene Substances 0.000 claims abstract description 12
- 229920001155 polypropylene Polymers 0.000 claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims abstract description 11
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 14
- 239000005977 Ethylene Substances 0.000 claims description 14
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 11
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 7
- 239000004711 α-olefin Substances 0.000 claims description 5
- 229920001897 terpolymer Polymers 0.000 claims 1
- 238000009987 spinning Methods 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 6
- 229920001684 low density polyethylene Polymers 0.000 abstract description 5
- 239000004702 low-density polyethylene Substances 0.000 abstract description 5
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 abstract 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 229920000092 linear low density polyethylene Polymers 0.000 description 4
- 239000004707 linear low-density polyethylene Substances 0.000 description 4
- 238000002788 crimping Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000012967 coordination catalyst Substances 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/32—Side-by-side structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43825—Composite fibres
- D04H1/43832—Composite fibres side-by-side
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4391—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece characterised by the shape of the fibres
- D04H1/43918—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece characterised by the shape of the fibres nonlinear fibres, e.g. crimped or coiled fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/237—Noninterengaged fibered material encased [e.g., mat, batt, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24826—Spot bonds connect components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2922—Nonlinear [e.g., crimped, coiled, etc.]
- Y10T428/2924—Composite
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
- Y10T428/2931—Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
- Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
- Y10T442/626—Microfiber is synthetic polymer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Materials For Medical Uses (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Multicomponent Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
め要約のデータは記録されません。
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は柔軟な長繊維不織布、特に高速溶融引取紡糸
による生産が可能で、目付当りの柔軟性に優れた長繊維
不織布に関するものである。
による生産が可能で、目付当りの柔軟性に優れた長繊維
不織布に関するものである。
長繊維不織布として、紡糸した長繊維を直接不織ウェブ
としたスパンボンド不織布は、他の乾式不織布や湿式不
織布に比べて生産性が高く、連続繊維からなるので引張
強度等の機械的性質に優れ、各種日用雑貨品や産業資材
などの分野に広く使用されている。
としたスパンボンド不織布は、他の乾式不織布や湿式不
織布に比べて生産性が高く、連続繊維からなるので引張
強度等の機械的性質に優れ、各種日用雑貨品や産業資材
などの分野に広く使用されている。
ところで、スパンボンド不織布のなかでも、ナイロン等
のポリアミドあるいはポリエチレンテレフタレート等の
ポリエステルを原料として製造したものに対し、ポリオ
レフィン製のスパンボンド不織布は一般に柔軟性に富み
、したがって使い捨てのシーツ、オムツのトップシート
等の分野への進出が計られつつある。
のポリアミドあるいはポリエチレンテレフタレート等の
ポリエステルを原料として製造したものに対し、ポリオ
レフィン製のスパンボンド不織布は一般に柔軟性に富み
、したがって使い捨てのシーツ、オムツのトップシート
等の分野への進出が計られつつある。
しかし、上記のような人体に直接触れるような分野で望
まれるに充分な柔軟性を有するスパンボンド不織布は見
当らない。
まれるに充分な柔軟性を有するスパンボンド不織布は見
当らない。
このような点を改善するために、フィラメントを捲縮さ
せることによって、柔軟性を付与した長繊維不織布が提
案されている。繊維に捲縮を生じさせたものとして、2
成分からなる並列形複合長繊維不織布(パイコンポーネ
ントスパンボンディング不織布)が提案されている。こ
の不織布は長繊維を2成分の並列形とすることによって
、収縮率の差により捲縮させるものであり、ポリプロピ
レンと高密度ポリエチレンの並列膨長繊維からなるもの
が知られている(例えば特開昭63−282351号)
。
せることによって、柔軟性を付与した長繊維不織布が提
案されている。繊維に捲縮を生じさせたものとして、2
成分からなる並列形複合長繊維不織布(パイコンポーネ
ントスパンボンディング不織布)が提案されている。こ
の不織布は長繊維を2成分の並列形とすることによって
、収縮率の差により捲縮させるものであり、ポリプロピ
レンと高密度ポリエチレンの並列膨長繊維からなるもの
が知られている(例えば特開昭63−282351号)
。
しかしながら、このような従来の捲縮された並列形複合
長繊維からなる不織布は、ファイバーの捲縮が少なくて
柔軟性が不十分であり、高速気流牽引により引取速度2
000m/分以上で安定紡糸でき、かつ柔軟性を持たせ
るに十分な捲縮を生じさせる樹脂組成は知られていない
。
長繊維からなる不織布は、ファイバーの捲縮が少なくて
柔軟性が不十分であり、高速気流牽引により引取速度2
000m/分以上で安定紡糸でき、かつ柔軟性を持たせ
るに十分な捲縮を生じさせる樹脂組成は知られていない
。
本発明の目的は、上記問題点を解決するため。
高速気流牽引により高速引取速度で安定紡糸でき、かつ
繊維の捲縮数が多くて柔軟な長繊維不織布を提供するこ
とである。
繊維の捲縮数が多くて柔軟な長繊維不織布を提供するこ
とである。
本発明は、 (A) : (a) DSC主ピークより
求めた融点が110〜150℃、MFR(ASTM D
−1238(L))がLog/10分以下のプロピレン
・エチレンランダム共重合体3〜40重量%、および (b) MFR(ASTM D−1238(E))が1
5g710分以上、密度0.935g/cj以下のポリ
エチレン97〜60重量%からなる第1成分と。
求めた融点が110〜150℃、MFR(ASTM D
−1238(L))がLog/10分以下のプロピレン
・エチレンランダム共重合体3〜40重量%、および (b) MFR(ASTM D−1238(E))が1
5g710分以上、密度0.935g/cj以下のポリ
エチレン97〜60重量%からなる第1成分と。
(B) MFR(ASTM D−1238(L))がL
Og/10分以上の結晶性ポリプロピレンを主成分とす
る第2成分とから構成される捲縮した並列形複合長繊維
からなることを特徴とする柔軟な長繊維不織布である。
Og/10分以上の結晶性ポリプロピレンを主成分とす
る第2成分とから構成される捲縮した並列形複合長繊維
からなることを特徴とする柔軟な長繊維不織布である。
本発明において第1成分(^)に使用するプロピレン・
エチレンランダム共重合体(a)は、OSC(示差走査
熱量計)の主ピークより求めた融点が110〜150℃
、好ましくは130〜145℃、MFR(メルトフロー
レート: ASTM D−1238(L))がLog/
10分以下、好ましくは 2〜7g/10分のプロピレ
ンとエチレンとのランダム共重合体である。そのエチレ
ン含量は上記融点により決まるが、約2〜10モル%、
好ましくは3〜5モル%である。場合によっては炭素数
4〜8のα−オレフィン例えば1−ブテンを約0〜10
モル%含んでいてもよい。
エチレンランダム共重合体(a)は、OSC(示差走査
熱量計)の主ピークより求めた融点が110〜150℃
、好ましくは130〜145℃、MFR(メルトフロー
レート: ASTM D−1238(L))がLog/
10分以下、好ましくは 2〜7g/10分のプロピレ
ンとエチレンとのランダム共重合体である。そのエチレ
ン含量は上記融点により決まるが、約2〜10モル%、
好ましくは3〜5モル%である。場合によっては炭素数
4〜8のα−オレフィン例えば1−ブテンを約0〜10
モル%含んでいてもよい。
プロピレン・エチレンランダム共重合体(a)の融点が
上記範囲であることにより、素材として柔軟性を有し、
またMFRが上記範囲であることにより、ポリエチレ
ンとの混合が良好となり、紡糸性が向上する、プロピレ
ン・エチレンランダム共重合体(a)の第1成分(A)
に対する配合蓋は3〜40重漱%、好ましくは10〜3
0重量%であり、この範囲とすることにより、混合が良
好となり、紡糸に適した粘度となって紡糸性が向上する
。
上記範囲であることにより、素材として柔軟性を有し、
またMFRが上記範囲であることにより、ポリエチレ
ンとの混合が良好となり、紡糸性が向上する、プロピレ
ン・エチレンランダム共重合体(a)の第1成分(A)
に対する配合蓋は3〜40重漱%、好ましくは10〜3
0重量%であり、この範囲とすることにより、混合が良
好となり、紡糸に適した粘度となって紡糸性が向上する
。
本発明の第1成分(A)に使用するポリエチレン(b)
は、MFR(ASTM D−1238(E))が15g
/10分以上。
は、MFR(ASTM D−1238(E))が15g
/10分以上。
好ましくは20g/10分以上、密度0.935g/−
以下、好ましくは0.915〜0.930g/alのも
のである。 このようなポリエチレンとしては低密度ポ
リエチレンおよび線状低密度ポリエチレンがあげられる
が。
以下、好ましくは0.915〜0.930g/alのも
のである。 このようなポリエチレンとしては低密度ポ
リエチレンおよび線状低密度ポリエチレンがあげられる
が。
前者が好ましい。
低密度ポリエチレンは、高圧法によって製造されるエチ
レンの単独重合体、またはエチレンと炭素数3以上、好
ましくは4〜20のα−オレフィン20モル%以下、好
ましくは10モル%以下との共重合体である。
レンの単独重合体、またはエチレンと炭素数3以上、好
ましくは4〜20のα−オレフィン20モル%以下、好
ましくは10モル%以下との共重合体である。
線状低密度ポリエチレン樹脂は、エチレンと炭素数4以
上、好ましくは4〜20のα−オレフィン0.5〜40
モル%、好ましくは0.5〜30モル%の共重合体であ
り、0〜100気圧(ゲージ圧)で配位触媒を用いて合
成する中低圧法により製造される線状低密度ポリエチレ
ン樹脂である。
上、好ましくは4〜20のα−オレフィン0.5〜40
モル%、好ましくは0.5〜30モル%の共重合体であ
り、0〜100気圧(ゲージ圧)で配位触媒を用いて合
成する中低圧法により製造される線状低密度ポリエチレ
ン樹脂である。
ポリエチレン(b)はMFRおよび密度が上記範囲であ
ることにより、高速引取速度で安定した紡糸が可能とな
る。ポリエチレン(b)は第1成分(A)に対して97
〜60重量%、好ましくは90〜70重量%配合される
。
ることにより、高速引取速度で安定した紡糸が可能とな
る。ポリエチレン(b)は第1成分(A)に対して97
〜60重量%、好ましくは90〜70重量%配合される
。
本発明における第1成分はプロピレン・エチレンランダ
ム共重合体(a)とポリエチレン(b)とを混合した組
成物である。プロピレン・エチレンランダム共重合体(
a)とポリエチレン(b)との混合はパンバリミキサー
、熱ロール、押出機など、常用されている混合手段、あ
るいは単なる紡糸押出機でのペレットブレンドなどが採
用でき、緊密な混合が可能であれば、混合方式に制限は
ない。
ム共重合体(a)とポリエチレン(b)とを混合した組
成物である。プロピレン・エチレンランダム共重合体(
a)とポリエチレン(b)との混合はパンバリミキサー
、熱ロール、押出機など、常用されている混合手段、あ
るいは単なる紡糸押出機でのペレットブレンドなどが採
用でき、緊密な混合が可能であれば、混合方式に制限は
ない。
本発明における第2成分(B)の結晶性ポリプロピレン
はMFR(^STM D−1238(L))がLog/
10分以上、好ましくは12〜40g/ 10分のもの
である。 この結晶性ポリプロピレンは、X線回折法に
よる結晶化度が40%以上、好ましくは55%以上のも
のが好ましい。結晶性ポリプロピレンは、プロピレンの
単独重合体、あるいはプロピレンと炭素原子数2または
4ないし20のα−オレフィン20モル%以下、好まし
くは10モル%以下との高結晶性共重合体である。
はMFR(^STM D−1238(L))がLog/
10分以上、好ましくは12〜40g/ 10分のもの
である。 この結晶性ポリプロピレンは、X線回折法に
よる結晶化度が40%以上、好ましくは55%以上のも
のが好ましい。結晶性ポリプロピレンは、プロピレンの
単独重合体、あるいはプロピレンと炭素原子数2または
4ないし20のα−オレフィン20モル%以下、好まし
くは10モル%以下との高結晶性共重合体である。
第2成分(B)はこのような結晶性ポリプロピレンを主
成分とするものであり、ポリエチレン、ポリブテン等の
他のポリオレフィンを約30モル%以下含んでいてもよ
い。
成分とするものであり、ポリエチレン、ポリブテン等の
他のポリオレフィンを約30モル%以下含んでいてもよ
い。
第1図(a) 、 (b) 、 (C)はそれぞれ本発
明の不織布を構成する長繊維の断面図であり、本発明の
長繊維不織布を構成する長繊維1は、上記第1成分(A
)と第2成分(B)の並列複合体からなる長繊維である
。長繊維1を構成する第1成分(A)と第2成分([+
)は、第1図(a)に示すように完全な並列状態でもよ
く、また(b)、(e)に示すように一方が他方を部分
的に覆う形状のものでもよい。
明の不織布を構成する長繊維の断面図であり、本発明の
長繊維不織布を構成する長繊維1は、上記第1成分(A
)と第2成分(B)の並列複合体からなる長繊維である
。長繊維1を構成する第1成分(A)と第2成分([+
)は、第1図(a)に示すように完全な並列状態でもよ
く、また(b)、(e)に示すように一方が他方を部分
的に覆う形状のものでもよい。
本発明の不織布を構成する長繊維1は、上記並列複合体
が捲縮したものであるが、第1成分(A)と第2成分(
B)を並列形に紡糸して複合体とすることにより1両者
の収縮率の差により捲縮が生じる。捲縮数は特に限定さ
れないが、JIS L1074による捲縮数として、l
O個/25mm以上、好ましくは30個725ma+以
上が好ましい。
が捲縮したものであるが、第1成分(A)と第2成分(
B)を並列形に紡糸して複合体とすることにより1両者
の収縮率の差により捲縮が生じる。捲縮数は特に限定さ
れないが、JIS L1074による捲縮数として、l
O個/25mm以上、好ましくは30個725ma+以
上が好ましい。
このような捲縮した長繊維は、例えば高速引取が可能な
点を生かして、高速同伴気流によって弓取る高速気流牽
引により引取り、そのまま不織状ウェッブを形成するス
パンボンド法により、不織布が製造される。
点を生かして、高速同伴気流によって弓取る高速気流牽
引により引取り、そのまま不織状ウェッブを形成するス
パンボンド法により、不織布が製造される。
第2図はスパンボンド法により不織布を製造する方法を
示す正面図である。不織布の製造は、まず第1成分(A
)および第2成分(B)の溶融ポリマーを並進形ノズル
2から並進状態で噴出して、長繊維1を紡糸し、この長
繊維1を高速気流牽引装置3から噴出される空気流に載
せて、分散板4により分散させながら移動捕集面5に集
積する。移動捕集面5により送り出された長繊維1は、
加熱されたエンボスロールと円筒状ロール間に送り込む
ことにより、長繊維1同士を加熱融着して不織布が製造
される。このほか長繊維1を加熱室に通して長繊維1同
士を融着したり、接着剤により接着したり、あるいはニ
ードルパンチ等により長繊維同士をからませたりして不
織布を製造することもできる。
示す正面図である。不織布の製造は、まず第1成分(A
)および第2成分(B)の溶融ポリマーを並進形ノズル
2から並進状態で噴出して、長繊維1を紡糸し、この長
繊維1を高速気流牽引装置3から噴出される空気流に載
せて、分散板4により分散させながら移動捕集面5に集
積する。移動捕集面5により送り出された長繊維1は、
加熱されたエンボスロールと円筒状ロール間に送り込む
ことにより、長繊維1同士を加熱融着して不織布が製造
される。このほか長繊維1を加熱室に通して長繊維1同
士を融着したり、接着剤により接着したり、あるいはニ
ードルパンチ等により長繊維同士をからませたりして不
織布を製造することもできる。
こうして製造される不織布は、繊度1〜20デニール、
好ましくは1.5〜4デニール、目付10〜200g/
rd、 好ましくは15〜120g/rrrとするのが
好ましい。
好ましくは1.5〜4デニール、目付10〜200g/
rd、 好ましくは15〜120g/rrrとするのが
好ましい。
本発明の不織布は、長繊維の捲縮数が多いので、目付当
りの柔軟性が高い。不織布の柔軟性はJISL−109
6によって測定されるが、日付当りの柔軟性は、コンベ
テの進行方向をたて方向として、たて方向の柔軟性をS
MD (g)、 よこ方向の柔軟性をSTD(g)
としたとき、目付当りの柔軟性はその幾何平均V籟丁百
丁で表わされ、 ソ江可〒≦0.4 X 1o(x150) ・(
I ]の範囲の良好な柔軟性を有する不織布が得られる
。
りの柔軟性が高い。不織布の柔軟性はJISL−109
6によって測定されるが、日付当りの柔軟性は、コンベ
テの進行方向をたて方向として、たて方向の柔軟性をS
MD (g)、 よこ方向の柔軟性をSTD(g)
としたとき、目付当りの柔軟性はその幾何平均V籟丁百
丁で表わされ、 ソ江可〒≦0.4 X 1o(x150) ・(
I ]の範囲の良好な柔軟性を有する不織布が得られる
。
このように本発明の不織布は高い柔軟性を有するため、
繊維を多量に使用しなくても、かさ高で柔軟な不織布が
得られ、紙おむつトップシート、生理用品等の柔軟性が
要求される用途に使用可能である。
繊維を多量に使用しなくても、かさ高で柔軟な不織布が
得られ、紙おむつトップシート、生理用品等の柔軟性が
要求される用途に使用可能である。
本発明の不織布は、特定のプロピレン・エチレンランダ
ム共重合体および低密度のポリエチレンからなる第1成
分と、結晶性ポリプロピレンからなる第2成分との並列
形複合長繊維からなるため、高速気流牽引により200
0m/分以上の高速引取速度で安定紡糸でき、かつ繊維
の捲縮数が多くて柔軟な長繊維不織布が得られる。
ム共重合体および低密度のポリエチレンからなる第1成
分と、結晶性ポリプロピレンからなる第2成分との並列
形複合長繊維からなるため、高速気流牽引により200
0m/分以上の高速引取速度で安定紡糸でき、かつ繊維
の捲縮数が多くて柔軟な長繊維不織布が得られる。
以下、本発明の実施例について説明する。
実施例I
DSC(Perkin Elmer DSC−7)によ
り昇温速度10℃/minで測定した主ピークより求め
た融点が140℃、MFR(ASTM D−1238(
L))6g/10分のポリプロピレン・エチレンランダ
ム共重合体17重量%と、 MFR(ASTMD−12
38(E)) 22g/ 10分、密度0.925g/
cdの低密度ポリエチレン83重量%のブレンド品を第
1成分とし、MFR(ASTM D−1238(L))
36g/ 10分、結晶化度60%の結晶性ポリプロピ
レンを第2成分とし、700ホールの並進形ノズルを用
い、1孔当りの吐出量0.88g/分で押出し、高速気
流牽引装置で引取り、分散板で分散させながら移約する
コンベアに受けた長繊維群を、加熱したエンボスロール
と円筒状ロール間で加熱下に加圧して不織布を製造した
。
り昇温速度10℃/minで測定した主ピークより求め
た融点が140℃、MFR(ASTM D−1238(
L))6g/10分のポリプロピレン・エチレンランダ
ム共重合体17重量%と、 MFR(ASTMD−12
38(E)) 22g/ 10分、密度0.925g/
cdの低密度ポリエチレン83重量%のブレンド品を第
1成分とし、MFR(ASTM D−1238(L))
36g/ 10分、結晶化度60%の結晶性ポリプロピ
レンを第2成分とし、700ホールの並進形ノズルを用
い、1孔当りの吐出量0.88g/分で押出し、高速気
流牽引装置で引取り、分散板で分散させながら移約する
コンベアに受けた長繊維群を、加熱したエンボスロール
と円筒状ロール間で加熱下に加圧して不織布を製造した
。
不織布を構成する長繊維は、&1li1度2.5デニー
ル、捲縮数48個725mmであり、牽引速度は288
0m/分で、糸切れは発生せず、安定して紡糸できた。
ル、捲縮数48個725mmであり、牽引速度は288
0m/分で、糸切れは発生せず、安定して紡糸できた。
得られた不織布について、たて、よこの柔軟性を下記の
1llQ定法により測定した結果を表1に示す。
1llQ定法により測定した結果を表1に示す。
測定方法
厚 さ: JIS L−1096に準じ、荷重0.1g
/mm3で4Iり定した。
/mm3で4Iり定した。
柔軟性: JIS L−1096に記載されているハン
ドルオメータ法に準じ、15 X 15cmの試験片を
用いて、スロット幅20a+mで測定した。
ドルオメータ法に準じ、15 X 15cmの試験片を
用いて、スロット幅20a+mで測定した。
比較例1
プロピレン・エチレンランダム共重合体として、融点1
34℃、 MFR(ASTM D−1238(L))
22g/ 10分のものを使用した以外は実施例1と同
一条件で行ったところ、ブレンド不良のため糸切れが多
発し、長繊維不織布を成形できなかった。
34℃、 MFR(ASTM D−1238(L))
22g/ 10分のものを使用した以外は実施例1と同
一条件で行ったところ、ブレンド不良のため糸切れが多
発し、長繊維不織布を成形できなかった。
比較例2
第1成分としてMFR(ASTM D−1238(E)
)30g/ 10分の線状低密度ポリエチレンを単独で
使用した以外は実施例1と同一条件で行ったところ、紡
糸性は良好であったが、フィラメントに捲縮は見られず
、柔軟性は表1に示すように不十分であった。
)30g/ 10分の線状低密度ポリエチレンを単独で
使用した以外は実施例1と同一条件で行ったところ、紡
糸性は良好であったが、フィラメントに捲縮は見られず
、柔軟性は表1に示すように不十分であった。
比較例3
第1成分トL テMFR(ASTM D−1238(E
))20g/ 10分、密度0.963g/−の高密度
ポリエチレンを使用した以外は実施例1と同条件で行っ
た結果を表1に示す。
))20g/ 10分、密度0.963g/−の高密度
ポリエチレンを使用した以外は実施例1と同条件で行っ
た結果を表1に示す。
比較例4
第1成分トシテ、MFR(ASTM D−1238(L
))12g/ 10分、結晶化度63%のポリプロピレ
ンを用いた以外は実施例1と同条件で行った結果を表1
に示す。
))12g/ 10分、結晶化度63%のポリプロピレ
ンを用いた以外は実施例1と同条件で行った結果を表1
に示す。
第1図(a)〜(c)は長繊維の断面図、第2図は不織
布の製造方法を示す正面図である。 各図中、同一符号は同一または相当部分を示し、1は長
繊維、2は並進形ノズル、3は高速気流牽引装置、4は
分散板、5は移動捕集面である。 代理人 弁理士 柳 原 成 r−N(v′)−j目
布の製造方法を示す正面図である。 各図中、同一符号は同一または相当部分を示し、1は長
繊維、2は並進形ノズル、3は高速気流牽引装置、4は
分散板、5は移動捕集面である。 代理人 弁理士 柳 原 成 r−N(v′)−j目
Claims (2)
- (1)(A):(a)DSC主ピークより求めた融点が
110〜150℃、MFR(ASTMD−1238(L
))が10g/10分以下のプロピレン・エチレンラン
ダム共重合体3〜40重量%、および (b)MFR(ASTMD−1238(E))が15g
/10分以上、密度0.935g/cm^3以下のポリ
エチレン97〜60重量%からなる第1成分と、 (B)MFR(ASTMD−1238(L))が10g
/10分以上の結晶性ポリプロピレンを主成分とする第
2成分とから構成される捲縮した並列形複合長繊維から
なることを特徴とする柔軟な長繊維不織布。 - (2)プロピレン・エチレンランダム共重合体が炭素数
4〜8のα−オレフィンを含む三元共重合体である請求
項(1)記載の長繊維不織布。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1104980A JP2682130B2 (ja) | 1989-04-25 | 1989-04-25 | 柔軟な長繊維不織布 |
US07/512,275 US5108820A (en) | 1989-04-25 | 1990-04-20 | Soft nonwoven fabric of filaments |
CA002015158A CA2015158C (en) | 1989-04-25 | 1990-04-23 | Soft nonwoven fabric of filament |
DE69021924T DE69021924T2 (de) | 1989-04-25 | 1990-04-23 | Weiche Vliesstoffe aus Fäden. |
EP90304338A EP0395336B1 (en) | 1989-04-25 | 1990-04-23 | Soft nonwoven fabric of filament |
AT90304338T ATE127171T1 (de) | 1989-04-25 | 1990-04-23 | Weiche vliesstoffe aus fäden. |
KR1019900005738A KR920007992B1 (ko) | 1989-04-25 | 1990-04-24 | 유연한 장섬유 부직포(nonwoven fabric of filaments) |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1104980A JP2682130B2 (ja) | 1989-04-25 | 1989-04-25 | 柔軟な長繊維不織布 |
Publications (2)
Publication Number | Publication Date |
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JPH02289159A true JPH02289159A (ja) | 1990-11-29 |
JP2682130B2 JP2682130B2 (ja) | 1997-11-26 |
Family
ID=14395241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1104980A Expired - Lifetime JP2682130B2 (ja) | 1989-04-25 | 1989-04-25 | 柔軟な長繊維不織布 |
Country Status (7)
Country | Link |
---|---|
US (1) | US5108820A (ja) |
EP (1) | EP0395336B1 (ja) |
JP (1) | JP2682130B2 (ja) |
KR (1) | KR920007992B1 (ja) |
AT (1) | ATE127171T1 (ja) |
CA (1) | CA2015158C (ja) |
DE (1) | DE69021924T2 (ja) |
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- 1990-04-23 EP EP90304338A patent/EP0395336B1/en not_active Expired - Lifetime
- 1990-04-23 DE DE69021924T patent/DE69021924T2/de not_active Expired - Lifetime
- 1990-04-23 AT AT90304338T patent/ATE127171T1/de not_active IP Right Cessation
- 1990-04-23 CA CA002015158A patent/CA2015158C/en not_active Expired - Lifetime
- 1990-04-24 KR KR1019900005738A patent/KR920007992B1/ko not_active IP Right Cessation
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JPH02191720A (ja) * | 1989-01-11 | 1990-07-27 | Daiwabo Co Ltd | 潜在捲縮性複合繊維及びその製造方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0559655A (ja) * | 1991-08-26 | 1993-03-09 | Mitsui Petrochem Ind Ltd | 不織布 |
JPH05230750A (ja) * | 1992-02-18 | 1993-09-07 | Chisso Corp | 熱接着性繊維シート |
US5800230A (en) * | 1996-09-11 | 1998-09-01 | Chisso Corporation | Conjugated filament nonwoven fabric and method of manufacturing the same |
JP2019501304A (ja) * | 2015-11-25 | 2019-01-17 | ダウ グローバル テクノロジーズ エルエルシー | 二成分フィラメント |
JP2018024965A (ja) * | 2016-05-18 | 2018-02-15 | ファイバーテクス・パーソナル・ケア・アクティーゼルスカブ | スパンボンデッド高ロフト不織ウェブを製造する方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0395336A2 (en) | 1990-10-31 |
US5108820A (en) | 1992-04-28 |
EP0395336B1 (en) | 1995-08-30 |
CA2015158C (en) | 1999-07-06 |
DE69021924D1 (de) | 1995-10-05 |
CA2015158A1 (en) | 1990-10-25 |
JP2682130B2 (ja) | 1997-11-26 |
DE69021924T2 (de) | 1996-03-07 |
KR900016527A (ko) | 1990-11-13 |
EP0395336A3 (en) | 1990-11-22 |
ATE127171T1 (de) | 1995-09-15 |
KR920007992B1 (ko) | 1992-09-21 |
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