JP2003096687A - Nonwoven fabric for printing base material - Google Patents
Nonwoven fabric for printing base materialInfo
- Publication number
- JP2003096687A JP2003096687A JP2001296423A JP2001296423A JP2003096687A JP 2003096687 A JP2003096687 A JP 2003096687A JP 2001296423 A JP2001296423 A JP 2001296423A JP 2001296423 A JP2001296423 A JP 2001296423A JP 2003096687 A JP2003096687 A JP 2003096687A
- Authority
- JP
- Japan
- Prior art keywords
- woven fabric
- fiber
- fused
- composite
- resin
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は印刷基材用不織布に
関する。TECHNICAL FIELD The present invention relates to a nonwoven fabric for a printing substrate.
【０００２】[0002]
【従来の技術】カレンダー用途をはじめとして、ポリオ
レフィン系繊維からなる不織布が印刷基材用の原反とし
て広く使用されている。このポリオレフィン系繊維から
なる不織布の製法は、例えば、乾式法又はスパンボンド
法により繊維ウエブを作成した後に、樹脂含浸工程等の
方法により、合成ゴムラテックスなどのバインダー、硬
化剤、及び柔軟仕上剤などを付与する方法である。この
樹脂含浸工程は、印刷時のずれを防止することや、表面
の平滑性を上げるために必ず行われている。また、樹脂
含浸工程に加えて、顔料を塗工することにより、更に表
面の平滑性を高めることがなされている。しかしなが
ら、このような方法により製造した不織布はウエブむら
が目立ちやすく、品位が落ちる欠点があった。2. Description of the Related Art Non-woven fabrics made of polyolefin fibers are widely used as raw materials for printing substrates, including those for calendar applications. The method for producing a nonwoven fabric made of this polyolefin-based fiber is, for example, a method such as a resin impregnation step after forming a fiber web by a dry method or a spunbond method, a binder such as a synthetic rubber latex, a curing agent, and a softening finish. Is a method of giving. This resin impregnation step is always performed to prevent misalignment during printing and to improve the smoothness of the surface. Further, by applying a pigment in addition to the resin impregnation step, the smoothness of the surface is further enhanced. However, the nonwoven fabric produced by such a method has a drawback that the unevenness of the web is easily noticeable and the quality is degraded.
【０００３】そこで、最近は湿式法により製造した不織
布からなる印刷基材が現れている。湿式法により製造し
た不織布は緻密で、表面平滑性が高く高品位ではある
が、不織布の強度が不十分であるため、樹脂含浸工程を
付与している。しかしながら、この樹脂含浸を施した不
織布は重量が高くなり、取り扱いが不便であると共に、
折れ皺が発生し易くなるという問題点があった。Therefore, recently, a printing substrate made of a nonwoven fabric manufactured by a wet method has appeared. The nonwoven fabric produced by the wet method is dense and has high surface smoothness and high quality, but since the strength of the nonwoven fabric is insufficient, a resin impregnation step is added. However, the non-woven fabric impregnated with this resin has a high weight and is inconvenient to handle, and
There has been a problem that folding wrinkles are likely to occur.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記の問題点
を解決するためになされたもので、印刷時のずれが発生
せず、表面が平滑で、しかも軽量で折れ皺の発生しない
印刷基材用に好適な不織布を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a printing substrate which does not cause misalignment during printing, has a smooth surface, is lightweight, and is free from creases. An object is to provide a non-woven fabric suitable for a material.
【０００５】[0005]
【課題を解決するための手段】本発明は、複合融着繊維
を８０ｍａｓｓ％以上含む湿式ウエブを、前記複合融着
繊維で融着した融着不織布表面層を備えた印刷基材用不
織布であり、前記印刷基材用不織布は実質的に繊維に由
来する樹脂のみによって融着していることを特徴とす
る、印刷基材用不織布である。このように、湿式ウエブ
から不織布を形成しているため、表面の平滑性、緻密性
が向上した、印刷特性に優れたものである。また、複合
融着繊維等の実質的に繊維に由来する樹脂のみによって
融着しており、樹脂含浸を行わずに必要な強度を発現し
ているため、印刷時のずれが発生せず、軽量で折れ皺の
発生しないものである。DISCLOSURE OF THE INVENTION The present invention is a non-woven fabric for a printing substrate, comprising a non-woven fabric surface layer obtained by fusing a wet web containing 80 mass% or more of the multi-fusion fiber with the multi-fusion fiber. The non-woven fabric for a printing substrate is characterized in that the non-woven fabric for a printing substrate is fused only with a resin substantially derived from fibers. Since the non-woven fabric is formed from the wet web as described above, the smoothness and the denseness of the surface are improved and the printing characteristics are excellent. In addition, since it is fused only by the resin that is substantially derived from the fibers such as the composite fused fiber, and the required strength is expressed without performing resin impregnation, there is no misalignment during printing, and it is lightweight. It does not cause wrinkles.
【０００６】[0006]
【発明の実施の形態】本発明の印刷基材用不織布におい
ては、樹脂含浸を行うことなく強度を発現できるよう
に、複合融着繊維を使用している。このように融着繊維
として複合融着繊維を使用しているのは、融着に関与し
ない樹脂成分の存在によって強度的に優れているように
するためである。BEST MODE FOR CARRYING OUT THE INVENTION In the non-woven fabric for a printing base material of the present invention, a composite fused fiber is used so that strength can be exhibited without impregnating a resin. The reason why the composite fusing fiber is used as the fusing fiber in this way is to make it excellent in strength due to the presence of the resin component not involved in the fusing.
【０００７】このように、複合融着繊維は融着に関与し
ない樹脂成分（非融着樹脂成分）１種類以上と、融着に
関与する樹脂成分（融着樹脂成分）１種類以上の樹脂成
分から構成されており、これらの作用が有効に働くよう
に、非融着樹脂成分と融着樹脂成分との最も融点差の小
さい融点差は１０℃以上あるのが好ましく、２０℃以上
あるのがより好ましい。As described above, the composite fusible fiber has at least one resin component (non-fusible resin component) not involved in fusion and one or more resin components involved in fusion (fusible resin component). In order to effectively operate these functions, the melting point difference with the smallest melting point difference between the non-fusing resin component and the fusing resin component is preferably 10 ° C or more, and more preferably 20 ° C or more. More preferable.
【０００８】本発明における「融点」は示差走査熱量計
を用い、昇温温度１０℃／分で、室温から昇温して得ら
れる融解吸熱曲線の極大値を与える温度をいう。なお、
極大値が２つ以上ある場合には、最も高温の極大値を融
点とする。The "melting point" in the present invention means the temperature which gives the maximum value of the melting endothermic curve obtained by raising the temperature from room temperature at a temperature raising temperature of 10 ° C./min using a differential scanning calorimeter. In addition,
When there are two or more maximum values, the highest temperature maximum value is taken as the melting point.
【０００９】この複合融着繊維はどのような樹脂成分か
ら構成されていても良く、例えば、ポリオレフィン系樹
脂、ポリアミド系樹脂、ポリエステル系樹脂、ビニリデ
ン系樹脂、ポリ塩化ビニル系樹脂、ポリウレタン系樹脂
などを適宜組み合わせた樹脂成分から構成されているこ
とができる。これらの中でも、複合融着繊維のいずれの
樹脂成分もポリオレフィン系樹脂から構成されている
と、ポリオレフィン系樹脂は比重が軽く、運搬等の取り
扱い時の作業性に優れているため、特に好適である。This composite fusion-bonded fiber may be composed of any resin component, for example, polyolefin resin, polyamide resin, polyester resin, vinylidene resin, polyvinyl chloride resin, polyurethane resin, etc. Can be composed of resin components appropriately combined with each other. Among these, if any resin component of the composite fused fiber is composed of a polyolefin-based resin, the polyolefin-based resin has a low specific gravity and is excellent in workability during handling such as transportation, and thus is particularly preferable. .
【００１０】この好適であるポリオレフィン系樹脂とし
ては、例えば、ポリエチレン系樹脂（例えば、超高分子
量ポリエチレン、高密度ポリエチレン、中密度ポリエチ
レン、低密度ポリエチレン、直鎖状低密度ポリエチレ
ン、エチレン共重合体（エチレン−アクリル酸共重合
体、エチレン−メタクリル酸共重合体、エチレン−ビニ
ルアルコール共重合体など）など）、ポリプロピレン系
樹脂（例えば、ポリプロピレン、プロピレン共重合体な
ど）、ポリメチルペンテン系樹脂（例えば、ポリメチル
ペンテン、メチルペンテン共重合体など）などを挙げる
ことができ、これらの中でも、ポリプロピレン系樹脂と
ポリエチレン系樹脂との組み合わせから構成されている
のが好ましい。Examples of suitable polyolefin resins include polyethylene resins (for example, ultra high molecular weight polyethylene, high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, ethylene copolymer ( Ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-vinyl alcohol copolymer, etc.), polypropylene resin (for example, polypropylene, propylene copolymer, etc.), polymethylpentene resin (for example, , Polymethylpentene, methylpentene copolymer, etc.), and among these, it is preferable to be composed of a combination of a polypropylene resin and a polyethylene resin.
【００１１】本発明の複合融着繊維の横断面形状は特に
限定されるものではないが、例えば、芯鞘型、偏芯型、
貼り合せ型、海島型、オレンジ型、多重バイメタル型で
あることができる。これらの中でも、繊維表面全体を構
成する融着樹脂成分によって融着することのできる、芯
鞘型、偏芯型、或いは海島型の複合融着繊維を好適に使
用でき、特に芯鞘型であるのが好ましい。The cross-sectional shape of the composite fusible fiber of the present invention is not particularly limited, but for example, a core-sheath type, an eccentric type,
It can be a laminated type, a sea-island type, an orange type, or a multiple bimetal type. Among these, a core-sheath type, an eccentric type, or a sea-island type composite fusion fiber that can be fused by a fusion resin component that constitutes the entire fiber surface can be preferably used, and is particularly a core-sheath type. Is preferred.
【００１２】したがって、本発明の複合融着繊維とし
て、芯成分がポリプロピレン系樹脂からなり、鞘成分が
ポリエチレン系樹脂からなる芯鞘型複合融着繊維を使用
するのが好ましい。Therefore, it is preferable to use a core-sheath composite fusion fiber having a core component made of a polypropylene resin and a sheath component made of a polyethylene resin as the composite fusion fiber of the present invention.
【００１３】本発明における複合融着繊維の繊度は特に
限定するものではないが、３．５ｄｔｅｘ以下であるの
が好ましく、繊度が小さければ小さい程、表面平滑性が
向上するため、１．７ｄｔｅｘ以下であるのが更に好ま
しい。なお、繊度が０．０５ｄｔｅｘ以下の極細複合融
着繊維を含んでいると、更に表面平滑性を向上させるこ
とができる。なお、繊度の下限は特に限定するものでは
ないが、１×１０−７ｄｔｅｘ程度が適当である。ま
た、複合融着繊維の繊維長は均一に分散して地合いの優
れる湿式ウエブを形成できるように、３〜２５ｍｍであ
るのが好ましく、５〜２０ｍｍであるのがより好まし
い。The fineness of the composite fusible fiber in the present invention is not particularly limited, but is preferably 3.5 dtex or less, and the smaller the fineness is, the more the surface smoothness is improved, so 1.7 dtex or less. Is more preferable. In addition, when the ultrafine composite fused fiber having a fineness of 0.05 dtex or less is included, the surface smoothness can be further improved. The lower limit of the fineness is not particularly limited, but about 1 × 10 −7 dtex is suitable. Further, the fiber length of the composite fusible fiber is preferably 3 to 25 mm, more preferably 5 to 20 mm so that a wet web having an excellent texture can be formed by being uniformly dispersed.
【００１４】なお、繊度が０．０５ｄｔｅｘ以下の極細
複合融着繊維は、例えば、常法の複合紡糸法により海島
型複合繊維を紡糸する際に、島成分を押し出す口金とし
て、芯鞘型、偏芯型、海島型の横断面形状を形成できる
ものを使用して海島型複合繊維を紡糸するか、常法の複
合紡糸法により海島型複合繊維を紡糸する際に、融点の
点で異なる２種類以上の樹脂成分を混合した樹脂を島成
分を押し出す口金に供給して海島型複合繊維を紡糸した
後に、海成分を除去して得ることができる。The ultrafine composite fused fiber having a fineness of 0.05 dtex or less is, for example, a core-sheath type, a core-sheath type, as a die for extruding an island component when a sea-island type composite fiber is spun by a conventional composite spinning method. When the sea-island type composite fiber is spun using a core-type or sea-island type cross-sectional shape, or when the sea-island type composite fiber is spun by a conventional composite spinning method, two types differing in melting point It can be obtained by supplying the resin obtained by mixing the above resin components to a die for extruding the island component, spinning the sea-island type composite fiber, and then removing the sea component.
【００１５】本発明における「繊度」は、ＪＩＳ Ｌ
１０１５、８．５．１（正量繊度）Ａ法により得られる
値をいい、「繊維長」は、ＪＩＳ Ｌ １０１５、８．
４により得られる値をいう。In the present invention, "fineness" means JIS L
1015, 8.5. 1 (positive amount fineness) means a value obtained by the A method, and the “fiber length” is JIS L 1015, 8.
The value obtained by 4.
【００１６】このような複合融着繊維は湿式ウエブ中、
８０ｍａｓｓ％以上含まれており、複合融着繊維で融着
しているため、融着不織布表面層は強度的に優れてお
り、従来必要であった樹脂含浸工程が不要となった。そ
の結果、軽量で印刷ずれや毛羽立ちも発生しない印刷基
材用不織布であることができる。複合融着繊維量が多け
れば多いほど、前記効果に優れているため、複合融着繊
維は湿式ウエブ中、９０ｍａｓｓ％以上を占めているの
が好ましく、湿式ウエブは実質的に複合融着繊維のみか
ら構成されているのが更に好ましい。Such a composite fused fiber is used in a wet web,
Since it is contained in an amount of 80 mass% or more and is fused by the composite fusion-bonded fibers, the surface layer of the fused non-woven fabric is excellent in strength, and the resin impregnation step which was conventionally required is no longer necessary. As a result, a non-woven fabric for a printing substrate can be obtained that is lightweight and does not cause print misalignment or fuzz. Since the larger the amount of the composite fusion fiber, the more excellent the above-mentioned effect, it is preferable that the composite fusion fiber occupy 90 mass% or more in the wet web, and the wet web substantially contains only the composite fusion fiber. More preferably, it is composed of
【００１７】本発明の湿式ウエブを構成できる複合融着
繊維以外の繊維（非複合融着繊維）としては、例えば、
前述のような複合融着繊維を構成できる１種類の樹脂成
分から構成するものを使用することができる。この非複
合融着繊維も軽量で、運搬等の取り扱い時の作業性に優
れているポリオレフィン系樹脂から構成されているのが
好ましい。このポリオレフィン系樹脂も複合融着繊維を
構成できるポリオレフィン系樹脂と同様のものであるこ
とができ、好ましくはポリプロピレン系樹脂又はポリエ
チレン系樹脂から構成されている。Examples of fibers (non-composite fusible fibers) other than the composite fusible fibers that can form the wet web of the present invention include:
It is possible to use one composed of one type of resin component that can form the above-mentioned composite fused fiber. The non-composite fusible fiber is also preferably made of a polyolefin resin which is lightweight and has excellent workability during handling such as transportation. This polyolefin resin can be the same as the polyolefin resin that can form the composite fused fiber, and is preferably made of polypropylene resin or polyethylene resin.
【００１８】本発明における非複合融着繊維の繊度は特
に限定するものではないが、３．５ｄｔｅｘ以下である
のが好ましく、繊度が小さければ小さい程、表面平滑性
が向上するため、１．７ｄｔｅｘ以下であるのが更に好
ましい。なお、繊度が０．０５ｄｔｅｘ以下の極細非複
合融着繊維を含んでいると、更に表面平滑性を向上させ
ることができる。なお、繊度の下限は特に限定するもの
ではないが、１×１０ −７ｄｔｅｘ程度が適当である。
また、非複合融着繊維の繊維長は均一に分散して地合い
の優れる湿式ウエブを形成できるように、３〜２５ｍｍ
であるのが好ましく、５〜２０ｍｍであるのがより好ま
しい。The fineness of the non-composite fused fiber in the present invention is special.
But is not limited to 3.5 dtex or less
Is preferable, and the smaller the fineness, the smoother the surface.
It is better to be 1.7 dtex or less to improve
Good In addition, the fineness of 0.05 dtex or less
Inclusion of fusible fibers further improves surface smoothness.
You can Note that the lower limit of fineness is particularly limited.
Not 1 x 10 -7About dtex is suitable.
In addition, the fiber length of the non-composite fused fiber is evenly dispersed and
3 to 25 mm so that a superior wet web can be formed
Is preferable, and more preferably 5 to 20 mm.
Good
【００１９】この繊度が０．０５ｄｔｅｘ以下の極細非
複合融着繊維は、例えば、常法の複合紡糸法又は混合紡
糸法により海島型複合繊維を紡糸した後に、海成分を除
去したり、メルトブロー法により製造したり、機械的作
用（例えば、水流などの流体流）により分割可能な分割
性繊維に対して機械的作用を作用させることによって得
ることができる。The ultrafine non-composite fused fiber having a fineness of 0.05 dtex or less can be obtained by, for example, spinning the sea-island type composite fiber by a conventional composite spinning method or a mixed spinning method, and then removing the sea component or the melt blowing method. Or by applying a mechanical action to a splittable fiber that can be split by a mechanical action (for example, a fluid stream such as a water stream).
【００２０】なお、本発明における「繊維」とはフィブ
リル化していないものをいい、例えば、パルプのように
フィブリル化したものを含まない。The "fiber" in the present invention means a non-fibrillated material and does not include a fibrillated material such as pulp.
【００２１】本発明の印刷基材用不織布は上述のような
複合融着繊維を８０ｍａｓｓ％以上含む湿式ウエブを、
前記複合融着繊維で融着した融着不織布表面層を備えて
おり、この融着不織布表面層は湿式ウエブから形成され
ているため、表面が緻密かつ平滑で、印刷特性に優れて
いる。The non-woven fabric for a printing substrate of the present invention comprises a wet web containing 80 mass% or more of the composite fusible fibers as described above.
The surface of the fused non-woven fabric fused with the composite fusible fibers is provided. Since the surface layer of the fused non-woven fabric is formed from a wet web, the surface is dense and smooth, and the printing characteristics are excellent.
【００２２】この湿式ウエブの形成方法は特に限定され
るものではなく、従来から公知の方法により形成するこ
とができる。例えば、水平長網方式、傾斜ワイヤー型長
網方式、円網方式、又は長網・円網コンビネーション方
式により形成できる。The method for forming the wet web is not particularly limited, and it can be formed by a conventionally known method. For example, it can be formed by a horizontal Fourdrinier system, a slanted wire fourdrinier system, a circular net system, or a fourdrinier / circle net combination system.
【００２３】また、融着不織布表面層を形成するための
複合融着繊維による融着は、例えば、無圧下で加熱して
行なっても良いし、加圧下で加熱して行なっても良い
し、或は無圧下で複合融着繊維の融着樹脂成分を溶融さ
せた後に加圧しても良い。このような融着を実施できる
装置として、例えば、熱カレンダー、熱風貫通式熱処理
器、シリンダ接触型熱処理器などを挙げることができ
る。The fusion with the composite fusion fibers for forming the surface layer of the fusion bonded non-woven fabric may be carried out, for example, by heating without pressure or by heating under pressure. Alternatively, pressure may be applied after the fusion resin component of the composite fusion fiber is melted under no pressure. As a device capable of performing such fusion bonding, for example, a thermal calender, a hot air penetration type heat treatment device, a cylinder contact type heat treatment device and the like can be mentioned.
【００２４】なお、加熱温度としては、加熱と加圧を同
時に行なう場合には、複合融着繊維の融着樹脂成分の軟
化温度から融点までの範囲内の温度であるのが好まし
く、加圧を伴わない場合には、複合融着繊維の融着樹脂
成分の軟化温度から融点よりも３０℃高い温度までの範
囲内で行なうのが好ましい。加圧条件は特に限定するも
のではなく適宜設定することができるが、印刷基材用不
織布の少なくとも一方向における５％モジュラス強度が
９０Ｎ／５ｃｍ幅以上となるように、加圧するのが好ま
しい。The heating temperature is preferably in the range from the softening temperature of the fusion-bonding resin component of the composite fusion-bonding fiber to the melting point when heating and pressurization are performed simultaneously. When not accompanied, it is preferable to carry out within the range from the softening temperature of the fusion-bonding resin component of the composite fusion-bonding fiber to a temperature 30 ° C. higher than the melting point. The pressurizing condition is not particularly limited and can be appropriately set, but it is preferable to pressurize so that the 5% modulus strength of the nonwoven fabric for printing substrate in at least one direction is 90 N / 5 cm width or more.
【００２５】本発明における「軟化温度」は、示差熱量
計を用い、昇温速度１０℃／分で室温から昇温して得ら
れる融解吸熱曲線の開始点を与える温度をいう。The "softening temperature" in the present invention means a temperature which gives a starting point of a melting endothermic curve obtained by using a differential calorimeter to elevate the temperature from room temperature at a heating rate of 10 ° C./min.
【００２６】なお、本発明の印刷基材用不織布は前述の
ような融着不織布表面層のみから構成していることもで
きるし、融着不織布表面層とは異なる層、例えば、非複
合融着繊維を２０ｍａｓｓ％を超えて含む不織布層、複
合融着繊維を８０ｍａｓｓ％未満の割合で含む不織布
層、非湿式不織布層（例えば、スパンボンド不織布層、
乾式不織布層など）、非融着不織布層（例えば、水流絡
合不織布層など）、織物層、フィルム層、編物層、ネッ
ト層、糸層などを備えていても良い。The non-woven fabric for a printing substrate of the present invention may be composed of only the above-mentioned fused non-woven surface layer, or may be a layer different from the fused non-woven surface layer, for example, a non-composite fused layer. A non-woven fabric layer containing fibers in excess of 20 mass%, a non-woven fabric layer containing composite fused fibers in a proportion of less than 80 mass%, a non-wet fabric non-woven fabric layer (for example, a spunbonded non-woven fabric layer,
Dry non-woven fabric layer), non-fusing non-woven fabric layer (for example, hydroentangled non-woven fabric layer), woven fabric layer, film layer, knitted layer, net layer, yarn layer and the like.
【００２７】融着不織布表面層と融着不織布表面層とは
異なる層との一体化は、例えば、融着不織布表面層とは
異なる層の上に、融着不織布表面層のもととなる湿式ウ
エブを積層し、融着不織布表面層の融着形成と同時に、
融着不織布表面層とは異なる層と一体化する方法、融着
不織布表面層と融着不織布表面層とは異なる層とを積層
した後に、融着不織布表面層及び／又は融着不織布表面
層とは異なる層の融着性を利用して一体化する方法、な
どを挙げることができる。なお、非複合融着繊維を２０
ｍａｓｓ％を超えて含む不織布層や、複合融着繊維を８
０ｍａｓｓ％未満の割合で含む不織布層の場合には、こ
れら不織布層のもととなる繊維ウエブも湿式ウエブと
し、融着不織布表面層のもととなる湿式ウエブと積層し
た後に、この積層湿式ウエブを融着して融着不織布表面
層を形成すると同時に、融着不織布表面層とは異なる層
を形成しても良い。The integration of the surface layer of the fused non-woven fabric and the layer different from the surface layer of the fused non-woven fabric is performed by, for example, forming a wet layer which is the surface layer of the fused non-woven fabric on a layer different from the surface layer of the fused non-woven fabric. Laminating webs, and at the same time as forming the fusion of the fused non-woven surface layer,
Method of integrating with a layer different from the fused nonwoven fabric surface layer, after laminating the fused nonwoven fabric surface layer and a layer different from the fused nonwoven fabric surface layer, and with the fused nonwoven fabric surface layer and / or the fused nonwoven fabric surface layer Can be integrated by utilizing the fusion property of different layers. The non-composite fusion fiber is 20
Non-woven fabric layer containing more than mass% and composite fused fiber 8
In the case of a non-woven fabric layer containing less than 0 mass%, the fibrous webs that are the basis of these non-woven fabrics are also wet webs, and after laminating with the wet web that is the basis of the fused non-woven fabric surface layer, this laminated wet web At the same time as forming the fused nonwoven fabric surface layer by fusing, a layer different from the fused nonwoven fabric surface layer may be formed.
【００２８】本発明の印刷基材用不織布は融着不織布表
面層のみ、又は融着不織布表面層に加えて融着不織布表
面層とは異なる層からなるが、実質的に繊維に由来する
樹脂のみによって融着している。つまり、樹脂含浸工程
を行うことなく、繊維に由来する樹脂のみで融着してい
るため、印刷基材用不織布は軽量で、柔軟性に優れ、し
かも折れ皺の発生しにくいものである。なお、繊維に由
来する樹脂は基本的には複合融着繊維を構成する融着樹
脂成分からなるが、非複合融着繊維を構成する樹脂成分
が含まれている場合もある。The non-woven fabric for a printing substrate of the present invention comprises only the fusible non-woven fabric surface layer or a layer different from the fusible non-woven fabric surface layer in addition to the fusible non-woven fabric surface layer, but substantially only a resin derived from fibers. Fused by. In other words, the non-woven fabric for a printing substrate is lightweight, has excellent flexibility, and is unlikely to cause creases because it is fused only with the resin derived from the fibers without performing the resin impregnation step. The resin derived from the fiber basically consists of the fusion resin component that constitutes the composite fusion fiber, but it may also contain the resin component that constitutes the non-composite fusion fiber.
【００２９】本発明の印刷基材用不織布は、印刷時に印
刷ずれを起こさないように、印刷基材用不織布は少なく
とも一方向における５％モジュラス強度が９０Ｎ／５ｃ
ｍ幅以上であるのが好ましく、９５Ｎ／５ｃｍ幅以上で
あるのが更に好ましい。なお、印刷時に印刷ずれを起こ
さないために、印刷時に張力のかかる方向、特に長手方
向において、前記５％モジュラス強度を有するのが好ま
しい。The non-woven fabric for a printing substrate of the present invention has a 5% modulus strength in at least one direction of 90 N / 5c so as not to cause misregistration during printing.
The width is preferably m or more, and more preferably 95 N / 5 cm or more. In order to prevent misregistration during printing, it is preferable to have the 5% modulus strength in the direction in which tension is applied during printing, particularly in the longitudinal direction.
【００３０】このような５％モジュラス強度を有する印
刷基材用不織布は、例えば、複合融着繊維の繊度、繊維
長、繊維の配向の程度、融着の程度など、様々な要因を
調整することによって前記値以上とすることができる。For such a non-woven fabric for a printing substrate having a 5% modulus strength, various factors such as the fineness of the composite fused fiber, the fiber length, the degree of orientation of the fibers, and the degree of fusion bonding can be adjusted. It is possible to make it above the above value.
【００３１】本発明における「５％モジュラス強度」
は、幅５ｃｍに裁断した印刷基材用不織布を、引張り強
さ試験機（オリエンテック製、テンシロンＵＴＭ−III
−１００）のチャックに固定（チャック間距離：１０ｃ
ｍ）し、引張り速度３００ｍｍ／ｍｉｎで、印刷基材用
不織布をチャック間の５％（＝５ｍｍ）引き伸ばすため
に必要とする力をいう。"5% modulus strength" in the present invention
Is a tensile strength tester (Tensilon UTM-III, manufactured by Orientec Co., Ltd.)
Fixed to -100 chuck (distance between chucks: 10c
m), and the force required to stretch the nonwoven fabric for a printing substrate by 5% (= 5 mm) between the chucks at a pulling speed of 300 mm / min.
【００３２】本発明の印刷基材用不織布の面密度は６０
〜２５０ｇ／ｍ2であるのが好ましく、より好ましくは
８０〜２００ｇ／ｍ2である。面密度が６０ｇ／ｍ2未満
であると、５％モジュラス強度が不足する場合があり、
２５０ｇ／ｍ2を超えると、厚さが厚くなり過ぎる場合
があるためである。The areal density of the non-woven fabric for a printing substrate of the present invention is 60.
Is preferably from to 250 g / m 2, more preferably from 80 to 200 g / m 2. If the areal density is less than 60 g / m 2 , the 5% modulus strength may be insufficient,
If it exceeds 250 g / m 2 , the thickness may become too thick.
【００３３】本発明の「面密度」は、ＪＩＳ Ｐ ８１
２４（紙及び板紙−坪量測定法）に規定されている方法
に基いて得られる坪量をいう。The "area density" of the present invention is defined by JIS P 81.
24 (paper and paperboard-grammage measurement method) is the basis weight obtained based on the method.
【００３４】以下に、本発明の実施例を記載するが、本
発明は以下の実施例に限定されるものではない。Examples of the present invention will be described below, but the present invention is not limited to the following examples.
【００３５】[0035]
【実施例】（実施例１）芯成分がポリプロピレン（融
点：１６０℃）からなり、鞘成分が高密度ポリエチレン
（融点：１３５℃）からなる、繊度が１．７ｄｔｅｘで
繊維長が５ｍｍの芯鞘型複合融着繊維（鞘成分が１００
％繊維表面を占める、横断面形状：円形）１００ｍａｓ
ｓ％を分散させたスラリーを、傾斜ワイヤー型長網方式
により抄造して繊維ウエブを形成した。Example 1 A core-sheath having a core component made of polypropylene (melting point: 160 ° C.) and a sheath component made of high-density polyethylene (melting point: 135 ° C.) having a fineness of 1.7 dtex and a fiber length of 5 mm. Type composite fused fiber (100 sheath components
% Cross-sectional shape occupying the fiber surface: circular) 100mas
The slurry in which s% was dispersed was made into paper by a slanted wire fourdrinier method to form a fiber web.
【００３６】次いで、この繊維ウエブを温度１３５℃に
設定された熱風貫通式熱処理機を用いて乾燥すると同時
に融着し、芯鞘型複合融着繊維を構成する鞘成分である
高密度ポリエチレンでのみ融着した融着不織布を形成し
た。Then, this fiber web is dried and fused at the same time by using a hot air penetration type heat treatment machine set at a temperature of 135 ° C., and only the high density polyethylene which is the sheath component constituting the core-sheath type composite fused fiber is used. A fused non-woven fabric was formed.
【００３７】次いで、この融着不織布を温度３５℃に設
定されたロール間を通すことにより、融着不織布の厚さ
調整を行い、本発明の印刷基材用不織布（面密度：８０
ｇ／ｍ2、厚さ：０．３５ｍｍ）を製造した。Next, this fused nonwoven fabric is passed between rolls set at a temperature of 35 ° C. to adjust the thickness of the fused nonwoven fabric, and the nonwoven fabric for printing substrate of the present invention (area density: 80
g / m 2 , thickness: 0.35 mm) was produced.
【００３８】（比較例１）繊維長が５１ｍｍであること
以外は実施例１の芯鞘型複合融着繊維と同じ芯鞘型複合
融着繊維１００ｍａｓｓ％をカーディングして、一方向
性繊維ウエブを２つ作成した。(Comparative Example 1) A unidirectional fiber web was prepared by carding 100% by mass of the core-sheath type composite fused fiber as the core-sheath type composite fused fiber of Example 1 except that the fiber length was 51 mm. I created two.
【００３９】次いで、一方の一方向性繊維ウエブＡ上
に、もう一方の一方向性繊維ウエブＢを、クロスレイヤ
ーにより一方の一方向性繊維ウエブＡの長手方向に対し
て交差させながら積層（一方向性繊維ウエブＡの質量：
一方向性繊維ウエブＢの質量＝１：２）し、面密度が６
０ｇ／ｍ２の積層繊維ウエブを形成した。Next, the other unidirectional fiber web B is laminated on one unidirectional fiber web A while being crossed by a cross layer with respect to the longitudinal direction of the one unidirectional fiber web A (one Mass of directional fiber web A:
The unidirectional fiber web B has a mass of 1: 2) and an areal density of 6
A 0 g / m 2 laminated fiber web was formed.
【００４０】続いて、この積層繊維ウエブの両面に、ア
クリル系バインダー及びメラミン系硬化剤からなるバイ
ンダー組成物を含浸した後に乾燥して、面密度１００ｇ
／ｍ ２のバインダー接着乾式不織布を製造し、このバイ
ンダー接着乾式不織布を比較用の印刷基材用不織布とし
た。Then, on both sides of this laminated fiber web,
A binder consisting of a curly binder and a melamine curing agent.
After being impregnated with the binder composition, the surface density is 100 g.
/ M TwoWe manufacture the binder-bonded dry non-woven fabric of
Under-bonded dry non-woven fabric was used as the non-woven fabric for printing base material for comparison.
It was
【００４１】（長手方向における５％モジュラス強度の
測定）長手方向と直交する方向に５ｃｍで、長手方向に
２０ｃｍの長方形状に、各印刷基材用不織布を裁断した
後、引張り強さ試験機（オリエンテック製、テンシロン
ＵＴＭ−III−１００）のチャックに固定（チャック間
距離：１０ｃｍ）し、引張り速度３００ｍｍ／ｍｉｎ
で、各印刷基材用不織布をチャック間の５％（＝５ｍ
ｍ）だけ引き伸ばし、この時に必要とした力を測定し
た。この結果は表１に示す通りであった。この結果から
明らかなように、本発明の印刷基材用不織布は軽量であ
るにもかからわず、十分な強度を有するものであった。(Measurement of 5% Modulus Strength in Longitudinal Direction) After cutting each non-woven fabric for printing substrate into a rectangular shape having a length of 5 cm in the direction orthogonal to the longitudinal direction and a length of 20 cm in the longitudinal direction, a tensile strength tester ( Orientec, Tensilon UTM-III-100) fixed to chuck (distance between chucks: 10 cm), pulling speed 300 mm / min
Then, 5% (= 5 m
Only m) was stretched and the force required at this time was measured. The results are shown in Table 1. As is clear from these results, the non-woven fabric for a printing substrate of the present invention was light in weight and had sufficient strength.
【００４２】（印刷特性の評価）各印刷基材用不織布に
対して、汎用型オフセット印刷機を使用して４色のイン
キで多色刷り印刷を行い、印刷ズレ及び表面平滑性を目
視により評価した。なお、印刷にはポリオレフィン専用
インキを使用した。この結果は表１に示す通りであっ
た。この結果から明らかなように、本発明の印刷基材用
不織布は印刷ズレ及び表面平滑性のいずれにも優れる印
刷基材として適切なものであった。(Evaluation of Printing Characteristics) Nonwoven fabrics for printing substrates were subjected to multicolor printing with four color inks by using a general-purpose offset printing machine, and printing misalignment and surface smoothness were visually evaluated. . In addition, the ink for exclusive use of polyolefin was used for printing. The results are shown in Table 1. As is clear from this result, the non-woven fabric for a printing substrate of the present invention was suitable as a printing substrate excellent in both print misalignment and surface smoothness.
【００４３】（緻密性の評価）各印刷基材用不織布の地
合いから緻密性を目視にて評価した。この結果は表１に
示す通りであった。この結果から明らかなように、本発
明の印刷基材用不織布は地合ムラのない緻密な、印刷基
材として適切なものであった。(Evaluation of Denseness) Denseness was visually evaluated from the texture of each non-woven fabric for printing substrate. The results are shown in Table 1. As is clear from this result, the nonwoven fabric for a printing substrate of the present invention was suitable as a dense printing substrate without unevenness in the formation.
【００４４】（折れ皺の評価）各印刷基材用不織布に強
制的に折り目をつけた後、すぐに元に戻し、折り目の付
き具合を目視にて評価した。この結果は表１に示す通り
であった。この結果から明らかなように、本発明の印刷
基材用不織布は折れ皺の発生しない取り扱い性の優れる
ものであった。(Evaluation of Folded Wrinkles) After forcibly making a crease on each non-woven fabric for a printing substrate, it was immediately returned to its original state, and the degree of crease formation was visually evaluated. The results are shown in Table 1. As is clear from these results, the non-woven fabric for a printing substrate of the present invention was excellent in handleability without causing wrinkles.
【００４５】[0045]
【表１】 評価１：○・・色の重なり方を拡大鏡で観察し、重なり方がほとんど一致して いる状態 △・・色の重なり方を拡大鏡で観察し、重なり方がややずれている状 態 ×・・色の重なり方を拡大鏡で観察し、重なり方がほとんどずれてい る状態 評価２：○・・印刷基材用不織布の印刷した側の表面を観察し、表面に凹凸が ほとんどない状態 △・・印刷基材用不織布の印刷した側の表面を観察し、表面にやや凸 凹がある状態 ×・・印刷基材用不織布の印刷した側の表面を観察し、表面の凹凸が 非常に大きい状態 評価３：○・・印刷基材用不織布の地合ムラを目視にて観察した時、地合ムラ がほとんどない状態 △・・印刷基材用不織布の地合ムラを目視にて観察した時、やや地合 ムラがある状態 ×・・印刷基材用不織布の地合ムラを目視にて観察した時、地合ムラ が大きい状態 評価４：○・・折り目がほとんど付いていない状態 △・・やや折り目が残っている状態 ×・・ほとんど折り目が残っている状態[Table 1] Evaluation 1: ○ ・ ・ The state that the overlapping of colors is observed with a magnifying glass and the overlapping is almost the same △ ・ ・ The way of overlapping of the colors is observed with a magnifying glass and the overlapping is slightly distorted ×・ ・ The state in which the overlapping of colors is observed with a magnifying glass and the overlapping is almost deviated Evaluation 2: ○ ・ ・ The surface of the printed side of the non-woven fabric for the printing substrate is observed, and there is almost no unevenness on the surface △ ..Observing the surface of the non-woven fabric for printing base material on the printed side, there is a slight unevenness on the surface ..... Observing the surface of the non-woven fabric for printing base material on the printed side. Condition evaluation 3: ○ ・ ・ When visually observing the formation unevenness of the non-woven fabric for the printing substrate △ ・ ・ When visually observing the uneven formation of the nonwoven fabric for the printing substrate There is some unevenness in the texture × ・ ・ Visual observation of texture unevenness of the nonwoven fabric for printing substrate When it is made, the texture unevenness is large Evaluation 4: ○ ・ ・ Few folds △ ・ ・ Slightly folds remaining × ・ ・ Few folds remaining
【００４６】[0046]
【発明の効果】本発明の印刷基材用不織布は、湿式ウエ
ブから不織布を形成しているため、表面の平滑性、緻密
性が向上した、印刷特性に優れたものである。また、複
合融着繊維等の実質的に繊維に由来する樹脂のみによっ
て融着しており、樹脂含浸を行わずに必要な強度を発現
しているため、印刷時のずれが発生せず、軽量で折れ皺
の発生しないものである。The non-woven fabric for a printing substrate of the present invention, which is formed from a wet web, has excellent printing characteristics with improved surface smoothness and denseness. In addition, since it is fused only by the resin that is substantially derived from the fibers such as the composite fused fiber, and the required strength is expressed without performing resin impregnation, there is no misalignment during printing, and it is lightweight. It does not cause wrinkles.
Claims (4)
湿式ウエブを、前記複合融着繊維で融着した融着不織布
表面層を備えた印刷基材用不織布であり、前記印刷基材
用不織布は実質的に繊維に由来する樹脂のみによって融
着していることを特徴とする、印刷基材用不織布。1. A non-woven fabric for a printing substrate, comprising: a non-woven fabric surface layer obtained by fusing a wet web containing 80 mass% or more of the multi-fusion fiber with the multi-fusion fiber. A non-woven fabric for a printing substrate, which is fused only by a resin substantially derived from fibers.
れもポリオレフィン系樹脂からなることを特徴とする、
請求項１記載の印刷基材用不織布。2. The resin component constituting the composite fusion-bonded fiber is made of polyolefin resin.
The non-woven fabric for a printing substrate according to claim 1.
からなることを特徴とする、請求項１又は請求項２に記
載の印刷基材用不織布。3. The non-woven fabric for a printing substrate according to claim 1, wherein the wet web is substantially composed of only the composite fusible fiber.
おける５％モジュラス強度が、９０Ｎ／５ｃｍ幅以上で
あることを特徴とする、請求項１〜３のいずれかに記載
の印刷基材用不織布。4. The non-woven fabric for printing substrate according to claim 1, wherein the non-woven fabric for printing substrate has a 5% modulus strength in at least one direction of 90 N / 5 cm width or more. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001296423A JP4746226B2 (en) | 2001-09-27 | 2001-09-27 | Nonwoven fabric for printing substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001296423A JP4746226B2 (en) | 2001-09-27 | 2001-09-27 | Nonwoven fabric for printing substrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003096687A true JP2003096687A (en) | 2003-04-03 |
| JP4746226B2 JP4746226B2 (en) | 2011-08-10 |
Family
ID=19117669
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001296423A Expired - Fee Related JP4746226B2 (en) | 2001-09-27 | 2001-09-27 | Nonwoven fabric for printing substrate |
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| JP (1) | JP4746226B2 (en) |
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| JPH0359837A (en) * | 1989-07-27 | 1991-03-14 | Matsushita Electric Ind Co Ltd | Timer controller |
| JPH0441290A (en) * | 1990-06-06 | 1992-02-12 | Goyo Paper Working Co Ltd | Recording paper |
| JPH07119073A (en) * | 1993-10-28 | 1995-05-09 | Unitika Ltd | Wet nonwoven fabric |
| JPH07292596A (en) * | 1994-04-15 | 1995-11-07 | Daiwabo Co Ltd | Wet bulky nonwoven fabric and its production |
| JPH09273060A (en) * | 1996-04-03 | 1997-10-21 | Oji Paper Co Ltd | Conjugate long fiber nonwoven fabric and its production |
| JPH11279840A (en) * | 1998-03-26 | 1999-10-12 | Nippon Ester Co Ltd | Conjugate fiber for wet type non-woven fabric and wet type non-woven fabric using the fiber |
| JP2000353509A (en) * | 1999-04-08 | 2000-12-19 | Japan Vilene Co Ltd | Alkaline battery separator |
| JP2001010247A (en) * | 1999-06-25 | 2001-01-16 | Riso Kagaku Corp | Base sheet for stencil printing |
| JP2002079599A (en) * | 2000-09-07 | 2002-03-19 | Yoshikawa Kami Shoji Kk | Nonwoven fabric wall paper and its manufacturing method |
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2001
- 2001-09-27 JP JP2001296423A patent/JP4746226B2/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0359837A (en) * | 1989-07-27 | 1991-03-14 | Matsushita Electric Ind Co Ltd | Timer controller |
| JPH0441290A (en) * | 1990-06-06 | 1992-02-12 | Goyo Paper Working Co Ltd | Recording paper |
| JPH07119073A (en) * | 1993-10-28 | 1995-05-09 | Unitika Ltd | Wet nonwoven fabric |
| JPH07292596A (en) * | 1994-04-15 | 1995-11-07 | Daiwabo Co Ltd | Wet bulky nonwoven fabric and its production |
| JPH09273060A (en) * | 1996-04-03 | 1997-10-21 | Oji Paper Co Ltd | Conjugate long fiber nonwoven fabric and its production |
| JPH11279840A (en) * | 1998-03-26 | 1999-10-12 | Nippon Ester Co Ltd | Conjugate fiber for wet type non-woven fabric and wet type non-woven fabric using the fiber |
| JP2000353509A (en) * | 1999-04-08 | 2000-12-19 | Japan Vilene Co Ltd | Alkaline battery separator |
| JP2001010247A (en) * | 1999-06-25 | 2001-01-16 | Riso Kagaku Corp | Base sheet for stencil printing |
| JP2002079599A (en) * | 2000-09-07 | 2002-03-19 | Yoshikawa Kami Shoji Kk | Nonwoven fabric wall paper and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4746226B2 (en) | 2011-08-10 |
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