KR101049623B1 - Dry pulp nonwoven fabric with integrated layer structure - Google Patents

Dry pulp nonwoven fabric with integrated layer structure Download PDF

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KR101049623B1
KR101049623B1 KR1020057012188A KR20057012188A KR101049623B1 KR 101049623 B1 KR101049623 B1 KR 101049623B1 KR 1020057012188 A KR1020057012188 A KR 1020057012188A KR 20057012188 A KR20057012188 A KR 20057012188A KR 101049623 B1 KR101049623 B1 KR 101049623B1
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nonwoven fabric
heat
fibers
pulp
fiber
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KR20050096108A (en
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야스지 야스미츠
야스유키 야마자키
쇼지 니시가와
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긴세이 세이시 가부시키가이샤
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    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
    • 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
    • D04H1/4374—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 using different kinds of webs, e.g. by layering webs
    • 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
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial 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
    • 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
    • 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
    • D04H1/425—Cellulose 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559—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 by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • 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]
    • Y10T442/69—Autogenously bonded nonwoven fabric
    • 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]
    • Y10T442/69—Autogenously bonded nonwoven fabric
    • Y10T442/692—Containing at least two chemically different strand or fiber materials
    • 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]
    • Y10T442/697—Containing at least two chemically different strand or fiber materials
    • 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]
    • Y10T442/697—Containing at least two chemically different strand or fiber materials
    • Y10T442/698—Containing polymeric and natural strand or fiber materials

Abstract

열접착성 합성 섬유를 포함하고, 당해 합성 섬유끼리 열접착되고, 기본 중량이 5g/㎡를 초과하여 12g/㎡ 이하인 양면의 표층부와, 열접착성 합성 섬유와 펄프 섬유가 20/80 ~ 60/40중량%의 비율의, 합성 섬유끼리 및/또는 합성 섬유와 펄프 섬유가 열접착된, 기본 중량이 8 ~ 240g/㎡의 내층부로 이루어지고, 전체로서 표리면과 내층부의 사이도, 당해 합성 섬유끼리의 열접착에 의해 일체화되어 있고, 종과 횡의 강력의 비율이 건조시 및 습윤시 모두 0.8 ~ 1.2이고, 건조시와 습윤시에 있어서의 강력의 비율이 0.6 ~ 1.1이고, 수분의 흡수성이 8 ~ 20g/g이고, 또한 총 기본 중량이 20 ~ 250g/㎡인 층상의 구조가 일체화된 건식 펄프 부직포이다. 얻어지는 건식 펄프 부직포는 섬유의 탈락이 없고, 흡수성이 좋고, 또한 습윤 강력이 크고, 젖은 상태로 사용되는 와이퍼, 키친 시트 등에 적합하다.20/80 to 60 / of the surface layer portions on both sides including heat-adhesive synthetic fibers, wherein the synthetic fibers are heat-bonded, and the basis weight is more than 5 g / m 2 and not more than 12 g / m 2. It consists of the inner-layer part of 8-240 g / m <2> of the basis weight which the synthetic fiber and / or the synthetic fiber and the pulp fiber heat-bonded in the ratio of 40 weight%, and also the said synthetic fiber between the front and back surface and the inner layer part as a whole It is integrated by thermal bonding of each other, the ratio of longitudinal and transverse strength is 0.8 to 1.2 in both drying and wetting, the ratio of strength in drying and wetting is 0.6 to 1.1, and the water absorption is It is a dry pulp nonwoven fabric having a layered structure of 8 to 20 g / g and a total basis weight of 20 to 250 g / m 2. The resulting dry pulp nonwoven fabric is free of fibers, has good water absorbency, has high wet strength, and is suitable for wipers, kitchen sheets, and the like used in a wet state.

부직포, 펄프, 건식, 층상, 일체화Nonwovens, Pulp, Dry, Layered, Integral

Description

층상의 구조가 일체화된 건식 펄프 부직포{DRY-PROCESS NONWOVEN PULP FABRIC COMPOSED OF UNITED LAYER STRUCTURES}DRY-PROCESS NONWOVEN PULP FABRIC COMPOSED OF UNITED LAYER STRUCTURES}

본 발명은 젖어도 강한 건식 펄프 부직포에 관한 것이다. 보다 상세하게는 젖은 상태로 사용되는 마루용, 부엌용, 자동차용 등의 대물(對物) 와이퍼나, 조리 기구 청소, 식료품 닦아내기, 드립 커피(drip coffee) 흡수용 등의 키친 시트나, 얼굴, 손, 신체 등의 대인(對人) 와이퍼 등에 적합한 부직포에 관한 것이다. 또한, 본 발명은 마른 상태로 사용되는 경우라도 이러한 용도에 있어서는 수분이 존재하는 경우가 많기 때문에 동일한 효과를 기대할 수 있고, 또한 생리 용품, 기저귀 등의 위생 재료나 의학 용도에 있어서도 동일하게 적합한 부직포에 관한 것이다. The present invention relates to a dry pulp nonwoven fabric that is wet even strong. More specifically, kitchen sheets such as floor wipers used in a wet state, kitchen wipers, etc., kitchen utensils for cleaning cooking utensils, cleaning food, and absorbing drip coffee. The present invention relates to a nonwoven fabric suitable for adult wipers such as hand, body, and the like. In addition, even when used in a dry state, the present invention can be expected to have the same effect because water is often present in such applications, and the same suitable non-woven fabric is also suitable for sanitary materials such as sanitary products, diapers, and medical applications. It is about.

종래부터 알려져 있는 건식 펄프 부직포는 펄프 섬유층을 베이스로 하여 폴리아크릴산 에스테르계나 폴리초산 비닐계 등의 화학 바인더 수지를 표층에 스프레이하거나 도포하거나 전체에 함침시키거나 하여 섬유간 결합을 형성하고 있다.BACKGROUND ART Conventionally known dry pulp nonwoven fabrics form a fiber-to-fiber bond by spraying, applying, or impregnating a chemical binder resin, such as polyacrylic ester or polyvinyl acetate, onto the surface layer, based on the pulp fiber layer.

이러한 부직포에 있어서는 바인더 양을 늘리면 수지는 막을 형성하여 딱딱해지거나 수분 흡수 능력의 저하를 초래하고, 또한 줄일 경우에는 펄프 섬유의 탈락이 증대할 뿐만 아니라, 강력(强力; strength), 특히 습윤시의 강력의 저하를 피할 수 없다.In such a nonwoven fabric, increasing the amount of the binder causes the resin to form a film to harden or cause a decrease in the water absorption capacity, and furthermore, not only increases the dropping of the pulp fibers, but also increases the strength, especially when wet. Deterioration of power is inevitable.

또한, 분말상의 바인더 수지를 부여하는 방법도 생각되지만, 이 경우 피막은 어려우나 펄프 섬유와 바인더와의 접착점의 수가 적게 되어 탈락 섬유가 많아지기 쉽다. 따라서, 너무 단단하지 않은 감촉, 적당한 흡수성, 적은 섬유 탈락, 실용(實用)에 견디는 강력 등을 확보하면서, 또한 습윤 강력이 우수한 건식 펄프 부직포를 만드는 것은 곤란하다.Moreover, although the method of giving a powdery binder resin is also considered, in this case, although a film is difficult, the number of adhesion points of a pulp fiber and a binder becomes small, and a fallout fiber tends to increase. Therefore, it is difficult to make a dry pulp nonwoven fabric having excellent wet strength while ensuring a texture that is not too hard, adequate water absorption, low fiber dropping, and strong strength to withstand practical use.

건식 펄프 부직포이고, 생리 용품의 흡수 삽입재나 가정 또는 공업용의 세정 용도에 사용되는 것으로서, 표면의 결합 섬유만으로 이루어지는 층의 기본 중량(basic weight)이 1 ~ 5g/㎡, 내층부의 결합 섬유가 2 ~ 10중량%인 건식 펄프 부직포가 제안되어 있다(특표 2000－504792호 공보).It is a dry pulp nonwoven fabric and is used for absorbent inserts for sanitary products or for cleaning applications for home or industrial use, and has a basic weight of 1 to 5 g / m 2 and a combined fiber of the inner layer at 2 to 5 g / m 2. A dry pulp nonwoven fabric of 10% by weight is proposed (JP-A No. 2000-504792).

이 부직포의 강도에 대해서, 통상의 강력에 관해서는 생리 용품의 흡수 삽입재와 같은 위생 용품의 용도로서는 충분하다고 말할 수 있고, 본 발명의 큰 포인트인 「젖어도 강하다」에 관해서는 일절 언급되어 있지 않다. 이 공개 특허의 범위에 들어가는 기술 내용의 부직포는 내층부의 결합 섬유의 양이 2 ~ 10중량%로 적고, 젖어도 강하다라고는 말하기 어렵고, 습윤시에 매우 심하게 강력 저하를 초래하는 것이고, 닦아내기에는 적합하지 않고, 본 발명의 의도와는 완전히 다르다.Regarding the strength of this nonwoven fabric, it can be said that the general strength is sufficient for use of hygiene products such as absorbent inserts of sanitary products, and it is not mentioned at all about the wet point which is a big point of the present invention. not. The nonwoven fabric of the technical content falling within the scope of this disclosure is less than 2 to 10% by weight of the binding fiber in the inner layer, hardly to be wet, and causes very strong deterioration when wet, and is difficult to wipe off. It is not suitable and is completely different from the intention of the present invention.

또한, 바인더 섬유의 교점(交點)을 열접착하여 형성되는, 특정의 인렬 강력(引裂 强力)을 가지는 에어레이드(air-laid) 부직포도 제안되어 있지만(특개 2000－345454호 공보), 펄프와 복합할 경우에 있어서의 습윤 강력이나 흡수성에 관한 언급은 일절 없고, 본 발명의 층상 구조로서의 기술을 시사하는 기재도 일절 없다.In addition, air-laid nonwoven fabrics having a particular tear strength, which are formed by thermally bonding the intersection points of binder fibers, have also been proposed (see Japanese Patent Application Laid-Open No. 2000-345454), but they are composited with pulp. In this case, there is no reference to the wet strength or the absorbency, and there is no description suggesting the technique as the layered structure of the present invention.

종래의 부직포에는 상기와 같은 문제가 있었다.The conventional nonwoven fabric had the above problems.

본 발명자들은 상술한 바와 같은 현상에 비추어, 열심히 검토를 거듭한 결과, 열접착성 합성 섬유를 포함하는 표리층의 기본 중량을 적정화하고, 또한 내층의 열접착성 합성 섬유의 양을 늘림으로써, 섬유의 탈락이 없고, 흡수성이 좋고, 또한 강한, 특히 습윤 강력이 충분한 건식 부직포를 얻을 수 있다는 것을 발견하고 본 발명의 완성에 이르렀다.In light of the above-described phenomena, the inventors of the present invention have conducted diligent studies to optimize the basis weight of the front and back layer including the heat-adhesive synthetic fibers and to increase the amount of the heat-adhesive synthetic fibers in the inner layer. It has been found that a dry nonwoven fabric can be obtained without falling off, having good water absorbency, and having sufficient strong, particularly wet strength, and has completed the present invention.

본 발명은 열접착성 합성 섬유를 포함하고, 당해 합성 섬유끼리 열접착되고 기본 중량이 5g/㎡를 초과하여 12g/㎡ 이하인 양면의 표층부와, 열접착성 합성 섬유와 펄프 섬유가 20/80 ~ 60/40중량%의 비율로 혼합되어 있고, 당해 합성 섬유끼리 및/또는 합성 섬유와 펄프 섬유가 열접착된 것으로 이루어지고, 기본 중량이 8 ~ 240g/㎡인 내층부로 이루어지고, 전체로서 표리면과 내층부의 사이도 당해 합성 섬유끼리의 열접착에 의해 일체화되어 있고, 종과 횡의 강력의 비율이 건조시 및 습윤시 모두 0.8 ~ 1.2이고, 건조시와 습윤시에 있어서의 강력의 비율이 0.6 ~ 1.1이고, 수분의 흡수성이 8 ~ 20g/g이고, 또한 총 기본 중량이 20 ~ 250g/㎡인 것을 특징으로 하는 층상의 구조가 일체화된 건식 펄프 부직포(이하, 단지 「건식 부직포」라고도 한다)에 관한 것이다.The present invention includes a heat-adhesive synthetic fiber, the synthetic fibers are heat-bonded, the surface layer portion of both sides having a basis weight of more than 5g / ㎡ 12g / ㎡ or less, heat-adhesive synthetic fibers and pulp fibers 20/80 ~ It is mixed at a ratio of 60/40% by weight, and the synthetic fibers and / or synthetic fibers and pulp fibers are heat-bonded, and composed of an inner layer having a basis weight of 8 to 240 g / m 2, and the front and back surfaces as a whole. The synthetic fibers are also integrated between the inner and inner layers by thermal bonding, and the ratio of longitudinal and transverse strength is 0.8 to 1.2 in both drying and wetting, and the ratio of strength in drying and wetting is 0.6. Dry pulp nonwoven fabric (hereinafter referred to simply as &quot; dry nonwoven fabric &quot;) having a layered structure characterized by having a water absorption of 8 to 20 g / g and a total basis weight of 20 to 250 g / m2. It is about.

이하, 본 발명의 실시의 형태를 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described.

본 발명의 부직포는 열접착성 합성 섬유와 펄프 섬유로 이루어지는 내층과, 이것을 사이에 두는 열접착성 합성 섬유를 포함하는 표층으로 3층 구조로 이루어져, 열접착에 의해 일체화되어 있다.The nonwoven fabric of this invention consists of a 3-layered structure which consists of an inner layer which consists of a heat-adhesive synthetic fiber and a pulp fiber, and the heat-adhesive synthetic fiber which sandwiches it, and is integrated by heat bonding.

본 발명에 있어서, 표층을 형성하는 주성분인, 또는 펄프와 혼합되는 열접착성 합성 섬유로서는, 열로 용융되어 서로 결합하는 것이면 어떠한 것이라도 좋고, 이 섬유간 결합에 의한 망목상(網目狀) 구조로 펄프가 고정되지만, 펄프 섬유와의 친화성이 큰 폴리머를 사용한 섬유가 특히 바람직하다. 예를 들면, 폴리올레핀류, 불포화 카르본산류로 그라프트화된 폴리올레핀류나, 폴리에스테르류, 폴리비닐 알코올 등을 들 수 있다.In the present invention, any of the heat-adhesive synthetic fibers, which are the main components forming the surface layer or mixed with the pulp, may be any ones as long as they are melted by heat and bonded to each other, and have a mesh-like structure by the inter-fiber bonding. Although pulp is fixed, fibers using a polymer having a high affinity with pulp fibers are particularly preferred. For example, polyolefins grafted with polyolefins and unsaturated carboxylic acids, polyesters, polyvinyl alcohol, etc. are mentioned.

이 중, 폴리올레핀계 열접착성 합성 섬유로서는 쉬스-코어형(sheath-core type)이나 편심 사이드 바이 사이드형(eccentric side-by-side type)의 복합 섬유가 적합하다. 쉬스(sheath) 또는 섬유 외주부를 구성하는 폴리올레핀으로서는 폴리에틸렌이나 폴리프로필렌을 들 수 있다. 코어(core) 또는 섬유 내층부를 구성하는 폴리머로서는 쉬스(sheath)보다 고융점이고, 가열 접착 처리 온도에서 변화하지 않는 폴리머가 바람직하다. 이러한 편성으로서, 예를 들면 폴리에틸렌/폴리프로필렌, 폴리에틸렌/폴리에스테르, 폴리프로필렌/폴리에스테르 등을 들 수 있다. 이러한 폴리머는 본 발명의 작용·효과를 저해하지 않는 범위에서 변성되어 있어도 지장이 없다. 또한 피브릴(fibril)상 섬유이어도 좋다. 예를 들면 미츠이 화학 주식회사의 SWP 등을 들 수 있다.Among them, sheath-core type or eccentric side-by-side type composite fibers are suitable as the polyolefin-based heat-adhesive synthetic fibers. Examples of the polyolefin constituting the sheath or fiber outer periphery include polyethylene and polypropylene. As the polymer constituting the core or the fiber inner layer, a polymer having a higher melting point than the sheath and which does not change at the heat adhesion treatment temperature is preferable. Examples of such knitting include polyethylene / polypropylene, polyethylene / polyester, polypropylene / polyester, and the like. Such a polymer is not impaired even if it is modified in a range that does not impair the action and effect of the present invention. Fibril-like fibers may also be used. For example, SWP of Mitsui Chemicals, Inc. is mentioned.

열접착성 합성 섬유는 가늘면 구성 섬유의 갯수가 많아지므로 탈락 섬유가 적게 되어 감촉도 부드러워진다. 굵은 경우는 섬유간의 공극이 커지고, 부피가 큰 부직포가 될 뿐만 아니라, 긁어내는 효과도 기대할 수 있다. 따라서, 섬유의 굵기는 용도에 따라 선택하면 좋지만, 바람직한 섬도는 0.5dt ~ 50dt이고, 더 바람직하게는 0.8dt ~ 30dt이다. 50dt를 넘으면 펄프의 탈락이 억제되지 않아 바람직하지 않다. 한편, 0.5dt 미만에서는 부직포의 생산성이 부족하므로 실용적이지 않다.Since the heat-adhesive synthetic fiber is thinner, the number of constituent fibers increases, so that there is less dropout fiber and the feel is soft. In the thick case, the space | gap between a fiber becomes large, it becomes a bulky nonwoven fabric, and a scraping effect can also be anticipated. Therefore, although the thickness of a fiber may be selected according to a use, preferable fineness is 0.5dt-50dt, More preferably, it is 0.8dt-30dt. If it exceeds 50dt, the fallout of the pulp is not suppressed, which is not preferable. On the other hand, if it is less than 0.5dt, productivity of a nonwoven fabric is lacking and it is not practical.

또한, 열접착성 합성 섬유의 길이는 1 ~ 15mm가 바람직하다. 섬유가 짧으면 펄프와의 혼합성이 좋아져 보다 균일인 부직포가 되기 쉽지만, 1mm 미만이 되면 분말상에 가까워져, 섬유간 결합에 의한 망목(網目) 구조를 만들기 어렵고, 펄프의 탈락을 억제할 수 없게 될 뿐만 아니라, 부직포로서의 강력이 낮아져, 실용성이 떨어지므로 바람직하지 않다. 한편, 15mm보다 길어지면 부직포의 강력은 커지지만, 부직포 제조시의 섬유의 공기 수송에 있어서 섬유끼리 얽히기 쉬워져, 섬유 괴상(纖維 塊狀)의 결점을 증대시키므로 바람직하지 않다. 특히 바람직한 것은 3 ~ 10mm이다.In addition, the length of the heat-adhesive synthetic fiber is preferably 1 to 15 mm. The shorter the fiber, the better the admixture with the pulp and the more easily the non-woven fabric becomes, but if it is less than 1 mm, it will be closer to the powder phase, making it difficult to form a mesh structure by the fiber-to-fiber bonding, and it will not be possible to prevent the pulp from falling off. However, since the strength as a nonwoven fabric is low and practicality is inferior, it is not preferable. On the other hand, when it is longer than 15 mm, the strength of the nonwoven fabric increases, but it is not preferable because the fibers tend to get entangled in the air transport of the fibers at the time of manufacturing the nonwoven fabric, thereby increasing the defects of the fiber mass. Especially preferred is 3-10 mm.

표층에는 상기의 열접착성 합성 섬유 외에, 레이온 등의 재생 섬유, 아세테이트 등의 반합성 섬유, 폴리에스테르, 폴리프로필렌, 폴리아미드, 비닐론 등의 합성 섬유나, 펄프, 면, 마 등의 천연 섬유 등 외의 섬유를 포함하고 있어도 좋다. 이 경우, 표층에 있어서의 열접착성 합성 섬유의 비율은 70 ~ 100중량%가 바람직하고, 더 바람직하게는 85 ~ 100중량%이다. 70중량% 미만의 경우는 상기의 다른 섬유의 탈락이 생길 가능성이 많아질 뿐만 아니라, 내층부의 펄프의 탈락을 억제하는 효과도 적게 될 뿐더러, 습윤 강력도 낮아져 실용상의 문제가 생긴다.In addition to the above-mentioned heat-adhesive synthetic fibers, surface fibers include regenerated fibers such as rayon, semisynthetic fibers such as acetate, synthetic fibers such as polyester, polypropylene, polyamide, and vinylon, and natural fibers such as pulp, cotton, and hemp. It may contain a fiber. In this case, the ratio of the heat-adhesive synthetic fiber in the surface layer is preferably 70 to 100% by weight, more preferably 85 to 100% by weight. In the case of less than 70% by weight, not only the dropping of the other fibers is more likely to occur, but also the effect of suppressing the dropping of the pulp in the inner layer is less, and the wet strength is also lowered, resulting in practical problems.

표층을 형성하는 이러한 섬유는 열접착되어 있고, 이 섬유간 결합에 의한 망목상 구조로 펄프가 고정된다. 기본 중량은 5g/㎡를 초과하여 12g/㎡ 이하가 아니면 안 된다. 5g/㎡ 이하에서는 내수성을 가지는 합성 섬유의 양, 및 섬유간의 결합점 수가 적기 때문에, 닦아내기에 견딜만한 충분한 습윤 강도를 확보할 수 없을 뿐만 아니라, 탈락 섬유의 증대를 초래하기 쉽다. 위생재와 같은 흡수성을 중시하는 용도와 달리, 닦아내기에 이용하는 경우는, 섬유가 탈락하기 쉽고, 이러한 부직포는 와이퍼나 키친 시트 등의 용도로서는 실용적이지 않다. 한편, 12g/㎡를 넘으면, 내수성이 있는 열접착의 층이 너무 두꺼워져 내층으로의 수분의 흡수가 불충분하게 될 뿐만 아니라, 감촉도 딱딱해져 역시 실용성이 부족하다. 기본 중량이 커지면 강도는 커지지만 흡수성은 저하된다. 하지만, 본 발명의 범위이면, 흡수성이 충분하고 또한 습윤시라도 강도가 있어, 섬유의 탈락도 없고, 감촉도 부드러운 부직포를 얻을 수 있다.These fibers forming the surface layer are heat bonded, and the pulp is fixed to the network structure by the interfiber bonding. The basis weight must exceed 12 g / m <2> exceeding 5 g / m <2>. At 5 g / m 2 or less, since the amount of synthetic fibers having water resistance and the number of bonding points between the fibers are small, not only sufficient wet strength to withstand wiping can be secured, but also it is easy to cause an increase in dropping fibers. Unlike the use which emphasizes absorbency like a hygiene material, when used for wiping off, a fiber is easy to fall off, and such a nonwoven fabric is not practical for use, such as a wiper and a kitchen sheet. On the other hand, if it exceeds 12 g / m 2, the water-resistant heat-adhesive layer becomes too thick to insufficiently absorb water into the inner layer, and the texture is also hard, which is also insufficient in practicality. The higher the basis weight, the higher the strength, but the lower the absorbency. However, if it is the scope of the present invention, it is possible to obtain a nonwoven fabric having sufficient absorbency and strength even when wet, without falling off of fibers and having a soft touch.

또한, 합성 섬유의 양이 많기 때문에, 기름의 흡수도 좋고, 기름 성분과의 친화성도 좋기 때문에, 더러움이 떨어지기 쉽다고 하는 이점도 있다.In addition, since the amount of synthetic fibers is large, the absorption of oil is good and the affinity with the oil component is also good, and there is also an advantage that dirt tends to fall.

내층부는 열접착성 합성 섬유와 펄프 섬유가 열접착에 의해 일체화되어 있다. 열접착성 합성 섬유는 표층과 같은 것을 이용해도, 다른 것을 이용해도 좋다. 펄프 섬유로서는 길이가 0.2mm ~ 5mm의 분쇄 펄프가 바람직하다.The inner layer portion is heat-bonded synthetic fibers and pulp fibers are integrated by heat bonding. The heat-adhesive synthetic fiber may use the same thing as the surface layer, or may use another. As pulp fiber, the grinding pulp of 0.2 mm-5 mm in length is preferable.

내층부의 열접착성 합성 섬유와 펄프 섬유의 혼합 비율은 열접착성 합성 섬유의 비율이, 접착성 합성 섬유와 펄프 섬유의 합계에 대해서 20중량% 미만에서는 탈락 섬유가 증가하여 강도, 특히 습윤시의 강도가 저하한다. 이러한 것은 위생 용품과 같은, 강도는 없어도 흡수성이나 부드러움을 중시하는 용도에는 사용할 수 있어도, 본 발명의 목적인 닦아내기용의 부직포로서는 사용할 만하지 않다. 한편, 60중량%를 넘으면, 흡수성에 기여하는 펄프 섬유의 양이 저하하여, 물의 닦음성(wiping property)이나 흡수성이 부족할 뿐더러, 감촉도 딱딱해져 실용성이 부족하다.The mixing ratio of the heat-adhesive synthetic fiber and the pulp fiber in the inner layer portion is such that when the ratio of the heat-adhesive synthetic fiber is less than 20% by weight relative to the total of the adhesive synthetic fiber and the pulp fiber, the dropping fibers increase and the strength, in particular, when wet Strength decreases. Such materials may be used as nonwoven fabrics for wiping, which is the object of the present invention, even if they can be used for applications that emphasize absorptivity and softness even without strength. On the other hand, if it exceeds 60% by weight, the amount of pulp fibers contributing to the water absorbency decreases, the wiping property and the water absorptivity of the water are insufficient, the texture is also hard, and the practicality is insufficient.

열접착성 합성 섬유의 비율이 커지면 강도는 커지지만 흡수성은 저하한다.As the ratio of the heat-adhesive synthetic fiber increases, the strength increases, but the water absorption decreases.

그래서, 충분한 강도, 특히 습윤시에 있어서의 강도와 흡수성의 양립은 어려웠다.Therefore, sufficient strength, in particular, both the strength and the absorbency at the time of wetness were difficult.

와이퍼류나 키친 시트류의 용도에 있어서 이러한 양립은 매우 중요하다. 본 발명의 비율의 범위에 있어서 먼저, 충분한 흡수성을 유지하고, 또한 습윤시라도 충분한 강도가 있는 부직포를 얻을 수 있는 것이다. 또한, 탈락 섬유의 양도 적고, 이러한 부직포는 더러워져도 씻어 짜 말리기에 충분한 정도의 강도가 있어, 몇차례반복하여 사용할 수가 있다. 또한, 열접착성 합성 섬유의 비율이 크기 때문에, 부피가 작고, 얇게 할 수가 있으므로, 핸들링성(handling property)이 뛰어나 공간절약에도 도움이 된다.This compatibility is very important for the use of wipers and kitchen sheets. Within the range of the ratio of the present invention, a nonwoven fabric having sufficient absorbency and sufficient strength even when wet can be obtained. In addition, the amount of the dropped fibers is small, and such a nonwoven fabric has a strength sufficient to be washed and dried even if it is dirty, and can be used repeatedly several times. In addition, since the ratio of the heat-adhesive synthetic fiber is large, the volume is small and the thickness can be made thin, so the handling property is excellent and the space is also conducive.

내층에 있어서, 열접착성 합성 섬유끼리, 또한 열접착성 합성 섬유와 펄프 섬유가 열접착되어 있다. 이 내층의 기본 중량은 8 ~ 240g/㎡가 바람직하다. 8g/㎡ 미만에서는 펄프의 양이 너무 적어 흡수성이 불충분하고, 한편 240g/㎡를 넘으면 전체가 판상을 나타내어 본 용도에는 적합하지 않다.In the inner layer, heat-adhesive synthetic fibers and heat-adhesive synthetic fibers and pulp fibers are heat-bonded. As for the basis weight of this inner layer, 8-240g / m <2> is preferable. If it is less than 8 g / m <2>, the quantity of pulp is too small and water absorption is insufficient, On the other hand, when it exceeds 240 g / m <2>, the whole will show plate shape and it is not suitable for this use.

또한, 부직포 전체로서 표리면과 내층부의 사이도 열접착성 합성 섬유끼리의 열접착에 의해 일체화되어 있다. 또한 충분한 열 밀봉(heat seal)성을 가진다.Moreover, the whole nonwoven fabric is also integrated between the front and back surface and an inner layer part by the thermal bonding of heat-adhesive synthetic fibers. It also has sufficient heat seal.

이러한 부직포는 건식 부직포이면 어떠한 방법으로 제조되어 있어도 좋지만, 에어레이드(air-laid)법에 의한 부직포가 바람직하다. 에어레이드법으로 제조된 부직포는, 부직포를 형성하고 있는 섬유가 부직포의 길이 방향, 폭 방향 및 두께 방향으로 무작위로 3차원 배향되어 있으므로 바람직하다.Such a nonwoven fabric may be produced by any method as long as it is a dry nonwoven fabric, but a nonwoven fabric by an air-laid method is preferable. The nonwoven fabric produced by the airlaid method is preferable because the fibers forming the nonwoven fabric are randomly three-dimensionally oriented in the longitudinal direction, the width direction, and the thickness direction of the nonwoven fabric.

여기서, 에어레이드법에 의한 부직포는 이하와 같이 하여 얻을 수 있다.Here, the nonwoven fabric by the airlaid method can be obtained as follows.

소정량의 해섬(解纖)된 열접착성 합성 섬유를 주체로 하는 섬유를 공기류(空氣流)에 균일 분산시키면서 반송(搬送)하고, 토출부(吐出部)에 마련한 세공을 가지는 스크린으로부터 불어 낸 당해 섬유를, 하부에 설치된 금속 또는 플라스틱의 망에 떨어뜨리고, 망 하부에서 공기를 흡입하면서 상기 섬유를 망 위에 퇴적시킨다. 다음에, 열접착성 합성 섬유와 펄프 섬유의 혼합물을 동일하게 하여, 상기 퇴적 시트 위에 퇴적시킨다. 또한 열접착성 합성 섬유를 주체로 하는 섬유를 이들 시트 위에 퇴적시킨다.The fibers mainly composed of a predetermined amount of decomposed heat-adhesive synthetic fibers are conveyed while being uniformly dispersed in an air stream, and blown from a screen having pores provided in the discharge portion. The fiber thus produced is dropped on a metal or plastic net provided in the lower part, and the fiber is deposited on the net while inhaling air from the lower part of the net. Next, a mixture of heat-adhesive synthetic fibers and pulp fibers is made identical and deposited on the deposition sheet. In addition, fibers mainly composed of heat-adhesive synthetic fibers are deposited on these sheets.

다음에, 이 열접착성 합성 섬유가 충분히 그 접착 효과를 발휘하는 온도로 전체를 가열 처리하여, 본 발명의 건식 펄프 부직포를 얻을 수 있다. 접착 효과를 충분히 발휘시키기 위해서는, 열접착성 합성 섬유의 접착 성분의 융점보다 15 ~ 40℃ 높은 온도에서의 가열 처리가 필요하다.Next, the whole pulp nonwoven fabric of this invention can be obtained by heat-processing the whole at the temperature which this heat adhesive synthetic fiber fully exhibits the adhesive effect. In order to fully exhibit the adhesive effect, heat treatment is required at a temperature of 15 to 40 ° C. higher than the melting point of the adhesive component of the heat-adhesive synthetic fiber.

이와 같이, 에어레이드법으로 제조된 부직포는 부직포의 길이 방향, 폭 방향 및 두께 방향으로 섬유를 무작위로 3차원 배향시키는 것이 가능하다. 그리고, 이것들이 열접착하므로 층간 박리를 일으키지 않는다. 또한, 에어레이드법으로 제조한 부직포는 균일성이 양호해서 성능의 불균형도 적게 된다.In this way, the nonwoven fabric produced by the airlaid method can randomly orient the fibers in the longitudinal direction, the width direction, and the thickness direction of the nonwoven fabric. And since these are heat bonded, they do not cause delamination. In addition, the nonwoven fabric produced by the airlaid method has a good uniformity, and the performance imbalance is also reduced.

필요하다면, 또한 캘린더(calender) 처리나 엠보싱(embossing) 처리를 할 수도 있다.If needed, you can also do calendaring or embossing.

본 발명의 부직포는 종과 횡의 강력의 비율이 건조시 및 습윤시 모두 0.8 ~ 1.2, 바람직하게는 0.85 ~ 1.2가 아니면 안 된다. 어느 일방의 강도가 낮으면 실용상의 지장이 생기기 쉽다.The nonwoven fabric of the present invention should have a longitudinal and transverse strength ratio of 0.8 to 1.2, preferably 0.85 to 1.2, both in drying and in wet. When either one of the strengths is low, practical problems are likely to occur.

또한, 건조시와 습윤시에 있어서의 강력의 비율은 0.6 ~ 1.1, 바람직하게는 0.7 ~ 1.1이 아니면 안 된다. 0.6 미만의 것은 건조시에 비해 습윤시의 강력이 크게 저하한다. 즉, 젖으면 약해지는 부직포이고, 본 발명이 의도하는 바를 벗어나 실용상 문제가 생긴다. 또한, 습윤시에는 수분의 존재에 의한 섬유간의 표면장력으로 강력이 상승하여 1을 넘는 경우가 있고, 이것도 본 발명의 범위이지만, 하등의 수분의 존재로 결합하는 다른 수단이 존재하지 않는 한 1.1을 넘는 것은 통상은 없다.In addition, the ratio of the strength at the time of drying and the humidity must be 0.6 to 1.1, preferably 0.7 to 1.1. The thing less than 0.6 greatly reduces the strength at the time of wet compared with the time of drying. That is, it is a nonwoven fabric which becomes weak when wet, and a problem arises practically beyond the intention of this invention. In addition, when wet, strength may increase due to the surface tension between fibers due to the presence of water, which is more than 1, which is also the scope of the present invention, but 1.1 is used unless other means for bonding in the presence of water exist. There is usually nothing to go beyond.

본 발명의 부직포가 적용되는 와이퍼류, 키친 시트류, 위재류(衛材類) 등에는 적당한 수분 흡수성이 필요하고, 수분의 흡수성은 8 ~ 20g/g, 바람직하게는 10 ~ 18g/g이 아니면 안 된다. 8g/g 미만에서는 실용에 있어서의 닦음성, 수분 보관 유지성이 부족하여 실용상 문제가 있다. 한편, 20g/g을 넘으면 부직포 자신이 보관 유지하는 수분양이 너무 많아서, 취급 핸들링성에 문제가 있다.Wipers, kitchen sheets, gastric materials, etc. to which the nonwoven fabric of the present invention is applied require proper water absorption, and the water absorption is not in the range of 8 to 20 g / g, preferably 10 to 18 g / g. Can not be done. If it is less than 8 g / g, there is a problem in practical use, lacking the wiping property and water storage retention property in practical use. On the other hand, when it exceeds 20 g / g, there is too much moisture amount which the nonwoven fabric itself maintains, and there exists a problem in handling handling property.

부직포 전체의 기본 중량으로서는 20 ~ 250g/㎡가 바람직하고, 용도에 따라 적절한 기본 중량을 선택할 수가 있다.As a basis weight of the whole nonwoven fabric, 20-250 g / m <2> is preferable and a suitable basis weight can be selected according to a use.

본 발명의 부직포는 본 발명의 의도를 손상시키지 않는 이상 다른 시트와 일체화하여도 좋다. 예를 들면, 통기성 시트와 일체화한다면, 본 발명의 부직포를 만들기에 즈음하여, 통기성 시트를 철망 위에 놓아두고, 이 위에 섬유를 퇴적시킴으로써 용이하게 복합 시트화할 수가 있다.The nonwoven fabric of the present invention may be integrated with other sheets so long as the intention of the present invention is not impaired. For example, if integrated with the breathable sheet, the composite sheet can be easily formed by placing the breathable sheet on a wire mesh and depositing fibers thereon in order to make the nonwoven fabric of the present invention.

또한, 일체화하는 시트로서는 일반적으로 알려져 있는 건식 부직포, 습식 부직포, 종이, 스펀본드(spun-bond) 부직포, 멜트블로운(melt-blown) 부직포, 플라스틱 망, 구멍 난 필름, 스플리트 얀 클로스(split yarn cloth), 눈이 성긴 직편물, 한랭사(寒冷紗) 등을 들 수 있지만, 열접착성 재료로 구성되어 있는 시트가 바람직하고, 또한 통기성은 큰 편이 바람직하다.In addition, as the sheet to be integrated, a dry nonwoven fabric, a wet nonwoven fabric, a paper, a spun-bond nonwoven fabric, a melt-blown nonwoven fabric, which is generally known, a plastic net, a perforated film, and a split yarn cloth yarn cloth, a loose knit fabric, a cold yarn, and the like, but a sheet made of a heat-adhesive material is preferred, and a higher air permeability is more preferable.

본 발명은 열접착성 합성 섬유를 포함하는 표리층의 기본 중량을 적정화하고, 또한 내층의 열접착성 합성 섬유의 양을 늘림으로써, 섬유의 탈락을 억제하고, 흡수성을 손상시키지 않고, 부직포의 강도를 습윤시의 사용이나 반복 사용에 견딜 수 있을 정도로 올리는 것이 가능하게 되었다. 또한, 물이나 기름의 닦음성도 좋고, 층간 박리도 없고, 닦아내기 용도에 아주 적합한 부직포를 얻을 수 있었다. 또한, 본 발명의 부직포는 충분한 열 밀봉(heat seal)성을 가진다. 또한, 생리 용품, 기저귀 등의 위생 재료나 의학 용도에 있어서도 동일하게 적합하다.The present invention optimizes the basis weight of the front and back layer including the heat-adhesive synthetic fibers and increases the amount of the heat-adhesive synthetic fibers in the inner layer, thereby suppressing the dropping of the fibers and not impairing the absorbency, thereby increasing the strength of the nonwoven fabric. Can be raised to withstand the use of wet or repeated use. In addition, it was possible to obtain a nonwoven fabric which is well suited for wiping with water and oil, without interlayer peeling, and suitable for wiping applications. In addition, the nonwoven fabric of the present invention has sufficient heat seal. Moreover, it is similarly suitable also for sanitary materials, such as a sanitary goods and a diaper, and a medical use.

또한, 본 발명의 부직포는 화학 바인더 수지에 의한 잔류 모노머의 걱정이 없고 위생적이다.Moreover, the nonwoven fabric of this invention is hygienic, without worry of residual monomer by chemical binder resin.

또한, 부직포의 제조 공정에 있어서 배수(排水)가 나오지 않고, 배기(排氣)에도 화학 바인더의 모노머가 없고, 환경 부하가 작다.In addition, in the manufacturing process of a nonwoven fabric, wastewater does not come out, exhaust gas does not have the monomer of a chemical binder, and environmental load is small.

본 발명을 실시예를 들어 설명하지만, 본 발명은 이러한 실시예에 한정되는 것은 아니다.Although an Example demonstrates this invention, this invention is not limited to this Example.

실시예 1Example 1

표리층부의 열접착성 섬유로서, 코어(core)가 폴리에틸렌 테레프탈레이트이고 쉬스(sheath)가 폴리에틸렌인 쉬스-코어형(sheath-core type) 복합 섬유(테이진 섬유 주식회사 제·F6. 2.2dt, 길이 5mm)를 이용하고, 내층부로서는, 코어(core)가 폴리프로필렌이고 쉬스(sheath)가 공중합 폴리에틸렌인 복합 섬유(질소 폴리프로필렌 섬유 주식회사·인탁. 1.7dt, 길이 5mm)와 펄프(Weyerhaeuser사 제·NB416 Kraft)를 각각 30중량%, 70중량%의 비율로 혼합한 것을 이용하고, 가열 온도를 145℃로 하여 에어레이드법으로 부직포를 제조했다.Sheath-core type composite fiber whose core is polyethylene terephthalate and the sheath is polyethylene, as the heat-adhesive fiber of the front and back layer part (made by Teijin Fiber Co., Ltd., F6.2.2dt, length) 5 mm) and a composite fiber (Nitrogen Polypropylene Fiber Co., Inc .; 1.7dt, 5 mm in length) and pulp (made by Weyerhaeuser) whose core is polypropylene and sheath is copolymerized polyethylene. NB416 Kraft) was mixed at a ratio of 30% by weight and 70% by weight, respectively, and a nonwoven fabric was produced by an airlaid method with a heating temperature of 145 ° C.

표리층의 기본 중량은 6g/㎡, 내층의 기본 중량은 33g/㎡로 하였다. 두께는 0.54mm였다.The basis weight of the front and back layers was 6 g / m 2, and the basis weight of the inner layer was 33 g / m 2. The thickness was 0.54 mm.

종횡(縱橫)의 강력, 그 비율, 그 건조시와 습윤시의 비율, 흡수성 등의 물성을 표 1에 나타낸다.Table 1 shows physical properties such as longitudinal strength, ratio, dry and wet ratio, water absorption, and the like.

또한, 강력, 흡수성은 이하의 방법으로 측정했다.In addition, strongness and water absorption were measured by the following method.

(1) 강력：JIS　L－1913에 의한다. 다만, 시험편의 폭은 25mm, 잡는 간격은 100mm로 하였다.(1) Strongness: It depends on JIS # L-1913. However, the width of the test piece was 25 mm and the holding interval was 100 mm.

(2) 흡수성：미리 중량을 측정한 100mm×100mm의 시험편을 20℃의 물에 1분 간 침지하고 나서, 45도로 기울인 유리판 위에 1분간 두고, 그 후 재차 중량을 측정하여, 하기에 의해서 흡수성을 산출한다.(2) Absorbency: The test piece of 100 mm x 100 mm which measured the weight in advance is immersed in 20 degreeC water for 1 minute, and it puts on the glass plate inclined at 45 degree | times for 1 minute, and after that, the weight is measured again and water absorption is carried out as follows. Calculate.

① 면적당 흡수성(g/㎡)：흡수한 물의 중량을 시험편의 면적으로 나누어 g/㎡로 표시한다.① Absorbency per area (g / m²): The weight of absorbed water is divided by the area of the test piece and expressed as g / m2.

② 자중(自重)당 흡수성(g/g)：흡수한 물의 중량을 시험편의 중량으로 나누어 g/g으로 표시한다.② Absorbency per self weight (g / g): The weight of absorbed water is divided by the weight of the test piece and expressed as g / g.

실시예 2Example 2

표리층부의 접착성 복합 섬유와 펄프의 비율을 90/10, 기본 중량을 8g/㎡, 내층부의 접착성 복합 섬유와 펄프의 비율을 25/75, 기본 중량을 49g/㎡로 한 것 외에는, 모두 실시예 1과 같게 하여 에어레이드법으로 부직포를 제조했다.All except the ratio of adhesive composite fibers and pulp at the front and back layers at 90/10, the basis weight at 8 g / m 2, the ratio of the adhesive composite fibers and pulp at the inner layer at 25/75, and the basis weight at 49 g / m 2. A nonwoven fabric was produced in the same manner as in Example 1 by the airlaid method.

두께는 0.68 mm였다.The thickness was 0.68 mm.

실시예 3Example 3

표리층부의 기본 중량을 10g/㎡, 내층부의 접착성 복합 섬유와 펄프의 비율을 40/60, 기본 중량을 100g/㎡로 한 것 외에는, 모두 실시예 1과 같게 하여 에어레이드법으로 부직포를 제조했다.Nonwoven fabrics were prepared in the same manner as in Example 1 except that the basis weight of the front and back layers was 10 g / m 2, the ratio of the adhesive composite fibers and pulp of the inner layer was 40/60, and the basis weight was 100 g / m 2. did.

비교예 1Comparative Example 1

표리층부의 기본 중량을 4g/㎡, 내층부의 접착성 복합 섬유와 펄프의 비율을 8/92, 기본 중량을 52g/㎡로 한 것 외에는, 모두 실시예 1과 같게 하여 에어레이드법으로 부직포를 제조했다.Nonwoven fabrics were produced in the same manner as in Example 1 except that the basis weight of the front and back layers was 4 g / m 2, the ratio of the adhesive composite fibers and pulp of the inner layer was 8/92, and the basis weight was 52 g / m 2. did.

비교예 2Comparative Example 2

표리층부의 기본 중량을 16g/㎡, 내층부의 접착성 복합 섬유와 펄프의 비율을 70/30, 기본 중량을 23g/㎡로 한 것 외에는, 모두 실시예 1과 같게 하여 에어레이드법으로 부직포를 제조했다.A nonwoven fabric was produced in the same manner as in Example 1 except that the basis weight of the front and back layers was 16 g / m 2, the ratio of the adhesive composite fiber and pulp of the inner layer was 70/30, and the basis weight was 23 g / m 2. did.

비교예 3Comparative Example 3

기본 중량이 58g/㎡의 펄프만에 의한 에어레이드 부직포를 제작하고, 폴리아크릴산 에스테르 수지의 에멀젼을 고형분으로 8g/㎡가 되도록 함침 부여한 뒤, 열풍 온도 130℃로 건조하여 수지 타입의 에어레이드 부직포로 하였다.Prepare an airlaid nonwoven fabric made of pulp only with a basis weight of 58 g / m 2, impregnating an emulsion of polyacrylic acid ester resin to 8 g / m 2 as a solid content, and drying it at a hot air temperature of 130 ° C. to a resin-type airlaid nonwoven fabric. It was.

상기의 실시예와 비교예로 얻어진 부직포의 물성을 표 1에 나타낸다.Table 1 shows the physical properties of the nonwoven fabric obtained in the above Examples and Comparative Examples.

Figure 112005034404251-pct00001
Figure 112005034404251-pct00001

본 발명의 층상의 구조가 일체화된 건식 펄프 부직포는 젖은 상태로 사용되는 마루용, 부엌용, 자동차용 등의 대물(對物) 와이퍼나, 조리 기구 청소, 식료품 닦아내기, 드립 커피(drip coffee) 흡수용 등의 키친 시트나, 얼굴, 손, 신체 등의 대인(對人) 와이퍼 등에 적합하다. 또한, 생리 용품, 기저귀 등의 위생 재료나 의학 용도에 있어서도 동일하게 적합하다.The dry pulp nonwoven fabric incorporating the layered structure of the present invention is an object wiper for floors, kitchens, automobiles, etc. used in a wet state, cleaning of cooking utensils, cleaning of foodstuffs, and drip coffee. It is suitable for kitchen sheets such as absorption and adult wipers such as face, hands and body. Moreover, it is similarly suitable also for sanitary materials, such as a sanitary goods and a diaper, and a medical use.

Claims (1)

열접착성 합성 섬유를 포함하고, 당해 합성 섬유끼리 열접착되고 기본 중량이 5g/㎡를 초과하여 12g/㎡ 이하인 양면의 표층부와, 열접착성 합성 섬유와 펄프 섬유가 20/80 ~ 60/40중량%의 비율로 혼합되어 있고, 당해 합성 섬유끼리가 열접착된 것, 또는 합성 섬유와 펄프 섬유가 열접착된 것으로 이루어지고, 기본 중량이 8 ~ 240g/㎡인 내층부로 이루어지고, 전체로서 양면의 표층부와 내층부의 사이도 당해 합성 섬유끼리의 열접착에 의해 일체화되어 있고, 종과 횡의 강력의 비율이 건조시 및 습윤시 모두 0.8 ~ 1.2이고, 건조시와 습윤시에 있어서의 강력의 비율이 0.6 ~ 1.1이고, 수분의 흡수성이 8 ~ 20g/g이고, 또한 총 기본 중량이 20 ~ 250g/㎡인 것을 특징으로 하는 층상의 구조가 일체화된 건식 펄프 부직포.20/80 to 60/40, wherein the surface layer portions on both sides including heat-adhesive synthetic fibers, which are heat-bonded with each other and whose base weight is more than 5 g / m 2 and 12 g / m 2 or less, and heat-adhesive synthetic fibers and pulp fibers It is mixed by the ratio of weight%, the said synthetic fiber is heat-bonded, or the synthetic fiber and the pulp fiber are heat-bonded, and consists of an inner layer part with a basis weight of 8-240g / m <2>, and double-sided as a whole Between the surface layer portion and the inner layer portion of is also integrated by thermal bonding of the synthetic fibers, the ratio of longitudinal and transverse strength is 0.8 to 1.2 in both drying and wetting, the ratio of strength in drying and wetting. The dry pulp nonwoven fabric with a layered structure characterized by the above-mentioned. It is 0.6-1.1, water absorption is 8-20g / g, and a total basis weight is 20-250g / m <2>.
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