JP2019070207A - Low-melting-temperature thermal fusion fiber - Google Patents
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本発明は、１００℃未満の温度で融着させることができる低融点熱融着性繊維に関する。 The present invention relates to low melting point heat fusible fibers that can be fused at temperatures below 100 ° C.
熱融着性繊維は、現在１００℃以上の熱処理温度で融着加工が行われている。しかし、従来の熱融着繊維は、原料樹脂が、低融点ナイロン樹脂、低融点ポリエステル樹脂、低融点ポリウレタン樹脂が主であり、多くは１２０℃〜１６０℃の温度で熱処理されている。 The heat-fusible fiber is currently fusion-processed at a heat treatment temperature of 100 ° C. or higher. However, in the conventional heat-fusion fibers, the raw material resins are mainly low-melting point nylon resins, low-melting point polyester resins, and low-melting point polyurethane resins, and most are heat-treated at temperatures of 120 ° C to 160 ° C.
しかしながら、１００℃を超える温度での熱処理温度では、設備投資が必要となる上、繊維製品作製後に他素材同士の接着剤として用いることはできない等各工程での制限があった。
そこで、熱処理温度の低温化が求められ、熱融着性繊維自体が低融点で融着しうる低融点融着性繊維が求められている。
However, at heat treatment temperatures above 100 ° C., capital investment is required, and there is a limitation in each process, such as that it can not be used as an adhesive for other materials after the production of fiber products.
Therefore, there is a demand for lowering the heat treatment temperature, and a low melting point fusible fiber in which the heat fusible fiber itself can be fused at a low melting point is required.
低融点熱融着性繊維を得るためには、従来よりいくつかの提案がなされている。例えば、特許文献１には、結晶融点が１００℃以上２００℃以下であるポリエチレンテレフタレートやポリエチレンナフタレート、及びその共重合体等を使用した熱接着繊維が提案されている。
また、特許文献２には、融点が１００℃〜１５０℃のポリエチレンテレフタレートを使用したポリエステル複合長繊維が提案されている。
また、特許文献３には、融点が１００℃以上１６０℃未満であるポリウレタンモノフィラメントが提案されている。
Several proposals have hitherto been made to obtain low melting point heat fusible fibers. For example, Patent Document 1 proposes a thermoadhesive fiber using polyethylene terephthalate or polyethylene naphthalate having a crystal melting point of 100 ° C. or more and 200 ° C. or less, a copolymer thereof, or the like.
Further, Patent Document 2 proposes a polyester composite long fiber using polyethylene terephthalate having a melting point of 100 ° C to 150 ° C.
Further, Patent Document 3 proposes a polyurethane monofilament having a melting point of 100 ° C. or more and less than 160 ° C.
しかしながら、特許文献１、特許文献２及び特許文献３の技術では、それらの繊維は全て融点が１００℃以上であり、１００℃未満の温度での熱水処理、例えば沸騰水処理では熱融着性がなく、低融点熱融着性繊維としては、熱処理工程に問題があり、また熱処理設備に制約がある。 However, according to the techniques of Patent Document 1, Patent Document 2 and Patent Document 3, all the fibers have a melting point of 100 ° C. or higher, and the thermal fusion treatment is carried out at a temperature of less than 100 ° C. As the low melting point heat fusible fiber, there is a problem in the heat treatment process, and there is a restriction in the heat treatment equipment.
本発明の目的は、このような従来技術における問題点を解決するため、１００℃未満の温度で融着させることのできる低融点熱融着性繊維を提供することにある。 An object of the present invention is to provide a low melting point heat fusible fiber which can be fused at a temperature of less than 100 ° C. in order to solve the problems in the prior art.
本発明の要旨は次のとおりである。
１．熱可塑性樹脂からなる繊維であって、該繊維の熱流束ＤＳＣにおけるＤＳＣ曲線に１００℃未満の融点を示す吸着ピークを少なくとも１つ有し、該ピークの大きさが−０．１ｃａｌ／ｇ以下である低融点熱融着性繊維。
２．前記熱可塑性樹脂がポリオレフィン系樹脂である前記１に記載の低融点熱融着性繊維。
３．前記ポリオレフィン系樹脂がポリエチレン樹脂である前記２に記載の低融点熱融着性繊維。
４．前記熱融着性繊維が長繊維である前記１〜３のいずれかに記載の低融点熱融着性繊維。
５． 前記熱融着性繊維が、融点が１００℃未満の熱可塑性樹脂５０〜１００質量％と融点が１００℃以上の熱可塑性樹脂０〜５０質量％を含有する樹脂からなる繊維である前記１〜４のいずれかに記載の低融点熱融着性繊維。
６．融点が１００℃未満の熱可塑性樹脂がメタロセン触媒にて重合されたポリオレフィン樹脂である前記５に記載の低融点熱融着性繊維。
７．前記ポリオレフィン系樹脂が、ポリエチレン樹脂である前記６に記載の低融点熱融着性繊維。
８．単繊維強度が１ｃＮ／ｄｔｅｘ以上であり、単繊維伸度が１００％以下である前記１〜７のいずれかに記載の低融点熱融着性繊維。
The gist of the present invention is as follows.
1. A fiber made of a thermoplastic resin, which has at least one adsorption peak showing a melting point of less than 100 ° C. in a DSC curve of the fiber in heat flux DSC, and the size of the peak is -0.1 cal / g or less Some low melting point heat fusible fibers.
2. The low melting point heat fusible fiber according to the above 1, wherein the thermoplastic resin is a polyolefin resin.
3. The low melting point heat fusible fiber according to 2 above, wherein the polyolefin resin is a polyethylene resin.
4. The low melting point heat fusible fiber according to any one of 1 to 3 above, wherein the heat fusible fiber is a long fiber.
5. The heat-fusible fiber is a fiber comprising a resin containing 50 to 100% by mass of a thermoplastic resin having a melting point of less than 100 ° C. and 0 to 50% by mass of a thermoplastic resin having a melting point of 100 ° C. or more. The low melting point heat fusible fiber according to any one of the above.
6. The low melting point heat fusible fiber according to the above 5, wherein the thermoplastic resin having a melting point of less than 100 ° C. is a polyolefin resin polymerized with a metallocene catalyst.
7. The low melting point heat fusible fiber according to the above 6, wherein the polyolefin resin is a polyethylene resin.
8. 11. The low melting point heat-fusible fiber according to any one of the above 1 to 7, wherein the single fiber strength is 1 cN / dtex or more and the single fiber elongation is 100% or less.
本発明によれば、１００℃未満の温度で融着させることができる融点が１００℃未満の低融点融着性繊維を提供することができ、本発明の繊維は、１００℃未満の乾熱または湿熱、例えば常圧の沸騰水での融着加工が可能となるので、新たな熱処理設備投資の必要がなく、また加工エネルギーの効率化や加工コストを低下させることができる。 According to the present invention, low melting point fusible fibers having a melting point of less than 100 ° C. which can be fused at a temperature of less than 100 ° C. can be provided, and the fibers of the present invention have a dry heat of less than 100 ° C. Since it is possible to perform fusion processing with boiling water of wet heat, for example, at normal pressure, there is no need to invest in a new heat treatment facility, and it is possible to improve processing energy efficiency and reduce processing costs.
本発明の低融点熱融着性繊維は、熱可塑性樹脂からなり、該繊維の熱流束ＤＳＣ（示差走査熱量測定）における曲線（以下、ＤＳＣ曲線という）に１００℃未満の融点を示す吸着ピークを少なくとも１つ有し、該ピークの大きさが−０．１ｃａｌ／ｇ以下である繊維であり、１００℃未満の温度で融着する低融点熱融着性繊維である。本発明の低融点熱融着性繊維のＤＳＣ曲線での１００℃未満の融点を示す吸着ピークは１つであってもよいし、２つ以上ある吸着ピークのうちの１つであってもよい。
繊維の融点が１００℃未満であれば、１００℃未満の乾熱、湿熱で融着し、常圧の沸騰水等の熱水での加工も可能であり、熱融着加工の汎用性からも有利である。
この観点から、前記融点は９５℃以下であることがより好ましく、９０℃以下であることがさらに好ましい。
The low melting point thermally fusible fiber of the present invention is made of a thermoplastic resin, and an adsorption peak showing a melting point of less than 100 ° C. in a curve (hereinafter referred to as DSC curve) in heat flux DSC (differential scanning calorimetry) of the fiber A low melting point heat fusible fiber comprising at least one fiber having a peak size of −0.1 cal / g or less and capable of being fused at a temperature of less than 100 ° C. The adsorption peak showing a melting point of less than 100 ° C. in the DSC curve of the low melting point heat-fusible fiber of the present invention may be one or may be one of two or more adsorption peaks. .
If the melting point of the fiber is less than 100 ° C, it can be fused by dry heat or wet heat of less than 100 ° C, and processing with hot water such as boiling water under normal pressure is also possible. It is advantageous.
From this viewpoint, the melting point is more preferably 95 ° C. or less, and still more preferably 90 ° C. or less.
本発明における低融点熱融着性繊維の融点は、繊維のＤＳＣ曲線での吸着ピークの温度に示される。
低融点熱融着性繊維のＤＳＣ曲線での１００℃未満の融点を示す吸着ピークの大きさは、−０．１ｃａｌ／ｇ以下であることが必要である。前記吸着ピークの大きさが−０．１ｃａｌ／ｇ以下であれば、１００℃未満の熱水で繊維間同士が融着することができる。
この観点から、前記吸着ピークの大きさは−０．２ｃａｌ／ｇ以下であることが好ましく、−０．３ｃａｌ／ｇ以下であることがより好ましい。
The melting point of the low melting point heat fusible fiber in the present invention is indicated by the temperature of the adsorption peak in the DSC curve of the fiber.
The size of the adsorption peak showing a melting point of less than 100 ° C. in the DSC curve of the low melting point heat fusible fiber is required to be −0.1 cal / g or less. If the size of the adsorption peak is -0.1 cal / g or less, the fibers can be fused with hot water of less than 100 ° C.
From this viewpoint, the size of the adsorption peak is preferably −0.2 cal / g or less, and more preferably −0.3 cal / g or less.
本発明の低融点熱融着性繊維は、その構成の熱可塑性樹脂がオレフィン系樹脂であることが好ましい。オレフィン系樹脂は、融点が低いことから、低融点熱融着性繊維が得られ易くなるため好ましい。 In the low melting point heat fusible fiber of the present invention, the thermoplastic resin of the constitution is preferably an olefin resin. The olefin resin is preferable because a low melting point thermally fusible fiber can be easily obtained since the melting point is low.
本発明の低融点熱融着性繊維は、長繊維であることが好ましく、長繊維であれば他繊維との組合せが容易であり製品の多様化の点でも好ましい。 The low melting point heat fusible fiber of the present invention is preferably a long fiber, and if it is a long fiber, it is easy to combine with other fibers and it is preferable from the viewpoint of product diversification.
また、本発明の低融点熱融着性繊維は、融点が１００℃未満の熱可塑性樹脂（以下、低融点樹脂という）のみからなる繊維であってもよいし、また低融点樹脂を５０〜１００質量％と融点が１００℃以上の熱可塑性樹脂（以下、高融点樹脂という）を０〜５０質量％含有する混合樹脂からなる繊維であってもよい。
混合樹脂においては、低融点樹脂を５０質量％以上含有するならば、１００℃未満の温度で良好な融着による接着性が得られる。また、熱接着後の繊維製品の強度を高くする場合は、混合樹脂中に５０質量％を超えない範囲で高融点樹脂を含有させることができる。
In addition, the low melting point heat fusible fiber of the present invention may be a fiber consisting only of a thermoplastic resin having a melting point of less than 100 ° C. (hereinafter referred to as a low melting point resin). It may be a fiber made of a mixed resin containing 0 to 50% by mass of a thermoplastic resin having a mass% and a melting point of 100 ° C. or higher (hereinafter referred to as a high melting point resin).
In the mixed resin, if the low melting point resin is contained 50% by mass or more, good adhesion by fusion can be obtained at a temperature of less than 100 ° C. In order to increase the strength of the fiber product after heat bonding, a high melting point resin can be contained in the mixed resin in a range not exceeding 50% by mass.
本発明の低融点熱融着性繊維は、その構成の低融点樹脂が、前記したとおり、オレフィン系樹脂であることが好ましいが、オレフィン系樹脂は、メタロセン触媒で重合されたオレフィン系樹脂、とりわけポリエチレン樹脂であることが好ましい。低融点樹脂が特にメタロセン触媒で重合されたポリエチレン樹脂であれば、十分な低融点融着性と軟質性が得られ、特に熱水での融着加工がより容易になる。 In the low melting point heat fusible fiber of the present invention, the low melting point resin of the constitution is preferably an olefin resin as described above, but the olefin resin is an olefin resin polymerized with a metallocene catalyst, in particular, It is preferable that it is a polyethylene resin. If the low melting point resin is a metallocene resin-polymerized polyethylene resin in particular, sufficient low melting point fusion and flexibility can be obtained, and in particular fusion processing with hot water becomes easier.
本発明の低融点熱融着性繊維は、単繊維強度が１ｃＮ／ｄｔｅｘ以上であり、単繊維伸度が１００％以下であることが好ましい。
単繊維強度が１ｃＮ／ｄｔｅｘ以上であれば、融着加工時の繊維の取扱いが容易となり、また単繊維伸度が１００％以下であれば、融着加工時の繊維の取扱いが容易となる。
この観点から、本発明の低融点熱融着性繊維は、単繊維強度が１．３ｃＮ／ｄｔｅｘ以上、単繊維伸度が９０％以下であることがより好ましく、単繊維強度が１．５ｃＮ／ｄｔｅｘ以上、単繊維伸度が８０％以下であることがさらに好ましい。
The low melting point heat-fusible fiber of the present invention preferably has a single fiber strength of 1 cN / dtex or more and a single fiber elongation of 100% or less.
If the single fiber strength is 1 cN / dtex or more, handling of the fiber during fusion bonding is easy, and if the single fiber elongation is 100% or less, handling of the fiber during fusion bonding is easy.
From this viewpoint, the low melting point heat fusible fiber of the present invention preferably has a single fiber strength of 1.3 cN / dtex or more and a single fiber elongation of 90% or less, and a single fiber strength of 1.5 cN / More preferably, the single fiber elongation is 80% or less.
本発明の低融点熱融着性繊維を構成する低融点樹脂、及び前記低融点樹脂に混合する高融点樹脂には、繊維物性に影響しない範囲で各種機能剤が添加され含まれていてもよい。例えば、樹脂に含まれる添加物としては、リン系化合物、含臭素化合物からなる難燃剤、ヒンダードアミン系化合物からなる耐光安定剤、酸化防止剤、マイカ、タルク、チタンカリウム、炭酸カルシウム、シリカ等の有機、無機物等の機能剤が挙げられ、また着色用の顔料及び染料が添加されていてもよい。
また、本発明の低融点熱融着性繊維は、その繊維断面が丸断面、及び三角等の異形断面でもよく、丸断面と異形断面の繊維が混合されていてもよい。さらに繊維繊度も任意に選択できる。
Various functional agents may be added to and contained in the low melting point resin constituting the low melting point heat fusible fiber of the present invention and the high melting point resin mixed with the low melting point resin as long as the fiber physical properties are not affected. . For example, as additives contained in the resin, a phosphorus-based compound, a flame retardant comprising a bromine-containing compound, a light stabilizer comprising a hindered amine-based compound, an antioxidant, mica, talc, titanium potassium, calcium carbonate, an organic compound such as silica And inorganic functional agents, and coloring pigments and dyes may be added.
Further, the low melting point heat-fusible fiber of the present invention may have a cross section with a round cross section or a triangular cross section, or fibers of a round cross section and a cross section with a different cross section may be mixed. Furthermore, the fiber fineness can also be selected arbitrarily.
本発明の低融点熱融着性繊維を構成する低融点樹脂及び高融点樹脂は、そのＭＦＲ（メルトフローレイト）値がそれぞれ５〜５０ｇ／分であることが好ましい。ＭＦＲ値が５ｇ／分以上であれば、安定した製糸性が得られる。また、ＭＦＲ値が５０ｇ／分以下であれば、安定した製糸性が得られると共に、得られた繊維の繊維強度の低下を少なくすることができる。
これらの観点から、本発明の低融点熱融着性繊維を構成する低融点樹脂及び高融点樹脂のＭＦＲ値は、それぞれ１０ｇ／分〜３０ｇ／分であることがより好ましい。
The low melting point resin and the high melting point resin constituting the low melting point heat fusible fiber of the present invention preferably have an MFR (melt flow rate) value of 5 to 50 g / min. If the MFR value is 5 g / min or more, stable spinning properties can be obtained. When the MFR value is 50 g / min or less, stable spinning properties can be obtained, and the decrease in fiber strength of the obtained fiber can be reduced.
From these viewpoints, the MFR value of each of the low melting point resin and the high melting point resin constituting the low melting point heat fusible fiber of the present invention is more preferably 10 g / min to 30 g / min.
本発明の低融点熱融着性繊維における高融点樹脂と低融点樹脂は、双方が相溶性のあるポリオレフィン系樹脂であることが好ましく、ポリオレフィン系樹脂であれば、ポリオレフィン系樹脂の種類或いは組合せに特に限定はないが、双方がポリエチレン樹脂であることがより好ましい。 The high melting point resin and the low melting point resin in the low melting point heat fusible fiber of the present invention are preferably both polyolefin resins which are compatible, and in the case of a polyolefin resin, the kind or combination of polyolefin resins There is no particular limitation, but it is more preferable that both be polyethylene resins.
以下、本発明を実施例により具体的に説明する。なお、実施例における各項目の測定は次の方法に拠った。 Hereinafter, the present invention will be specifically described by way of examples. In addition, the measurement of each item in an Example depended on the following method.
（樹脂のＭＦＲ測定方法）
ＭＦＲの測定はＪＩＳ Ｋ７２１０のＢ法に準じた。
(MFR measurement method of resin)
The measurement of MFR conformed to method B of JIS K7210.
（繊維の熱流束ＤＳＣ（示差走査熱量測定）方法）
ＤＳＣは、ＤＳＣ装置（リガク社製Ｔｈｅｒｍｏ ｐｌｕｓ ＤＳＣ８２３０ ＳＭＡＲＴ ＬＯＡＤＥＲ）を使用し、ＪＩＳ Ｋ７１２１（２０１２）に準じた。
(Fiber heat flux DSC (differential scanning calorimetry) method)
As DSC, a DSC apparatus (Thermo plus DSC 8230 SMART LOADER manufactured by RIGAKU CO., LTD.) Was used, and was in accordance with JIS K 7121 (2012).
（実施例１）
低融点樹脂としてポリエチレン樹脂Ａ（日本ポリエチレン社製、カーネルＫＳ５６０Ｔ、ＭＦＲ＝１７ｇ／１０分、融点９０℃、密度０．８９）を準備した。
孔形状が丸形状、孔径が０．８ｍｍの吐出孔を３０個有する紡糸口金を用いて、紡糸頭温度２０５℃で、吐出量３９．５ｇ／分で、溶融した前記ポリエチレン樹脂Ａを紡出し、紡糸速度が４００ｍ／分で巻き取とった。引き続いて、延伸倍率が４．１５倍、延伸温度が５０℃、熱セット温度が７０℃で延伸を行い、巻取速度が３００ｍ／分で巻き取り、２５０ｄｔｅｘ／３０フィラメント（総繊度２５０ｄｔｅｘ、フィラメント数３０本）の熱融着性繊維を得た。得られた繊維の単繊維物性は、引張強度が１．７４ｃＮ／ｄＴｅｘ、引張伸度が６８．０％であった。
この熱融着性繊維は、図１のＤＳＣ曲線が示すとおり、ＤＳＣ曲線には融点が８９.４℃であることを示す吸熱ピーク１の１つの吸着ピークがあり、吸着ピーク１の大きさが−１２．８１８ｃａｌ／ｇであった。
また、この熱融着性繊維を筒編機にて編地を作成し、沸騰水で５分間の熱処理を行った。得られた編地を目視で観察したところ、繊維の全ての交点に融着箇所が確認できた。これらの条件及び結果を表１に示す。
Example 1
As a low melting point resin, polyethylene resin A (manufactured by Nippon Polyethylene Co., Kernel KS 560T, MFR = 17 g / 10 min, melting point 90 ° C., density 0.89) was prepared.
The molten polyethylene resin A is spun at a spinning head temperature of 205 ° C. and a discharge rate of 39.5 g / min using a spinneret having 30 round discharge holes with a round shape and a hole diameter of 0.8 mm. The film was taken up at a spinning speed of 400 m / min. Subsequently, the film is drawn at a draw ratio of 4.15 times, a drawing temperature of 50 ° C., a heat setting temperature of 70 ° C., a winding speed of 300 m / min, 250 dtex / 30 filaments (total denier 250 dtex, number of filaments) 30) heat fusible fibers were obtained. The single fiber physical properties of the obtained fiber were a tensile strength of 1.74 cN / dTex and a tensile elongation of 68.0%.
This heat-fusible fiber has one adsorption peak of endothermic peak 1 indicating that the melting point is 89.4 ° C. in the DSC curve, as shown by the DSC curve in FIG. 1, and the size of adsorption peak 1 is It was −12.818 cal / g.
Further, a knitted fabric was made of this heat-fusible fiber with a tubular knitting machine, and heat treatment was performed for 5 minutes with boiling water. As a result of visual observation of the obtained knitted fabric, fusion-bonded portions could be confirmed at all intersection points of the fibers. These conditions and results are shown in Table 1.
（実施例２）
実施例１にて低融点樹脂として使用したポリエチレン樹脂Ａ９０質量％、高融点樹脂としてポリエチレン樹脂Ｂ（日本ポリエチレン社製、ＨＥ４８１、ＭＦＲ＝１５ｇ／１０分、融点１３４℃、密度０．９６）１０質量％の混合比で混合した樹脂を準備し、延伸倍率を４．５６倍に変えた以外は、実施例１と同条件で、２３１ｄｔｅｘ／３０フィラメントの熱融着性繊維を得た。得られた繊維の単繊維物性は、引張強度が１．７０ｃＮ／ｄｔｅｘ、引張伸度が６９．０％であった。
この熱融着性繊維は、図２のＤＳＣ曲線が示すとおり、ＤＳＣ曲線には融点が８９．５℃であることを示す吸熱ピーク１と融点が１２５.２℃であることを示す吸熱ピーク２の２つの吸熱ピークがあり、吸着ピーク１の大きさが−９．５０８ｃａｌ／ｇであった。
また、この熱融着性繊維を筒編機にて編地を作成し、沸騰水で５分間の熱処理を行った。得られた編地を目視で観察したところ、繊維の全ての交点に融着箇所が確認できた。これらの条件及び結果を表１に示す。
(Example 2)
90% by mass of polyethylene resin A used as low melting point resin in Example 1, polyethylene resin B as high melting point resin (manufactured by Japan Polyethylene Corporation, HE481, MFR = 15 g / 10 min, melting point 134 ° C., density 0.96) 10 mass A heat-sealable fiber of 231 dtex / 30 filaments was obtained under the same conditions as in Example 1 except that a resin mixed at a mixing ratio of% was prepared and the draw ratio was changed to 4.56 times. The single fiber physical properties of the obtained fiber were 1.70 cN / dtex in tensile strength and 69.0% in tensile elongation.
The heat fusible fiber has an endothermic peak 1 which shows that the melting point is 89.5 ° C. and an endothermic peak 2 which shows that the melting point is 125.2 ° C. as shown by the DSC curve in FIG. There were two endothermic peaks of and the size of adsorption peak 1 was -9.508 cal / g.
Further, a knitted fabric was made of this heat-fusible fiber with a tubular knitting machine, and heat treatment was performed for 5 minutes with boiling water. As a result of visual observation of the obtained knitted fabric, fusion-bonded portions could be confirmed at all intersection points of the fibers. These conditions and results are shown in Table 1.
（実施例３）
実施例２におけるポリエチレン樹脂Ａとポリエチレン樹脂Ｂとの混合樹脂の混合比を、ポリエチレン樹脂Ａ８０質量％、ポリエチレン樹脂Ｂ２０質量％の混合比に変更し、吐出量を２４．０ｇ／分、延伸倍率を４．７３倍に変えた以外は、実施例１と同条件で、１３３ｄｔｅｘ／３０フィラメントの熱融着性繊維を得た。得られた繊維の単繊維物性は、引張強度は１．７３ｃＮ／ｄｔｅｘ、引張伸度は５６．０％であった。
この熱融着性繊維は、図３のＤＳＣ曲線が示すとおり、ＤＳＣ曲線には融点が８８．２℃であることを示す吸熱ピーク１と融点が１２６．１℃であることを示す吸熱ピーク２の２つの吸熱ピークがあり、吸着ピーク１の大きさが−７．８７３ｃａｌ／ｇであった。また、この熱融着性繊維を筒編機にて編地を作成し、沸騰水で５分間熱処理を行った。得られた編地を目視で観察したところ、繊維の全ての交点に融着箇所が確認できた。これらの条件及び結果を表１に示す。
(Example 3)
The mixing ratio of the mixed resin of polyethylene resin A and polyethylene resin B in Example 2 is changed to a mixing ratio of 80% by mass of polyethylene resin A and 20% by mass of polyethylene resin B, discharge amount is 24.0 g / min, draw ratio is A heat-fusible fiber of 133 dtex / 30 filaments was obtained under the same conditions as in Example 1 except that it was changed by 4.73 times. With respect to single fiber physical properties of the obtained fiber, the tensile strength was 1.73 cN / dtex, and the tensile elongation was 56.0%.
This heat-fusible fiber has an endothermic peak 1 which shows that the melting point is 88.2 ° C. and an endothermic peak 2 which shows that the melting point is 126.1 ° C. as shown by the DSC curve in FIG. There were two endothermic peaks of and the size of adsorption peak 1 was -7.873 cal / g. In addition, a knitted fabric was made of this heat-fusible fiber with a cylinder knitting machine, and heat treatment was performed with boiling water for 5 minutes. As a result of visual observation of the obtained knitted fabric, fusion-bonded portions could be confirmed at all intersection points of the fibers. These conditions and results are shown in Table 1.
（実施例４）
実施例２におけるポリエチレン樹脂Ａとポリエチレン樹脂Ｂとの混合樹脂の混合比を、ポリエチレン樹脂Ａ７０質量％、ポリエチレン樹脂Ｂ３０質量％の混合比に変更し、吐出量を２４．０ｇ／分、延伸倍率を４．９０倍に変えた以外は、実施例１と同条件で、１３８ｄｔｅｘ／３０フィラメントの熱融着性繊維を得た。得られた繊維の単繊維物性は、引張強度は１．５６ｃＮ／ｄｔｅｘ、引張伸度は３８．０％であった。
この熱融着性繊維は、図４のＤＳＣ曲線が示すとおり、ＤＳＣ曲線には融点が９０．４℃であることを示す吸熱ピーク１と融点が１２７．２℃であることを示す吸熱ピーク２の２つの吸熱ピークがあり、吸着ピーク１の大きさが−３．７６８ｃａｌ／ｇであった。
また、この熱融着性繊維を筒編機にて編地を作成し、沸騰水で５分間熱処理を行った。得られた編地を目視で観察したところ、繊維の全ての交点に融着箇所が確認できた。これらの条件及び結果を表１に示す。
(Example 4)
The mixing ratio of the mixed resin of polyethylene resin A and polyethylene resin B in Example 2 is changed to a mixing ratio of 70% by mass of polyethylene resin A and 30% by mass of polyethylene resin B, discharge amount is 24.0 g / min, draw ratio is A thermally fusible fiber of 138 dtex / 30 filaments was obtained under the same conditions as in Example 1 except that the power was changed by 4.90 times. The single fiber physical properties of the obtained fiber were such that the tensile strength was 1.56 cN / dtex and the tensile elongation was 38.0%.
This heat-fusible fiber has an endothermic peak 1 indicating that the melting point is 90.4 ° C. and an endothermic peak 2 indicating that the melting point is 127.2 ° C. in the DSC curve, as shown by the DSC curve in FIG. There were two endothermic peaks of and the size of adsorption peak 1 was −3.768 cal / g.
In addition, a knitted fabric was made of this heat-fusible fiber with a cylinder knitting machine, and heat treatment was performed with boiling water for 5 minutes. As a result of visual observation of the obtained knitted fabric, fusion-bonded portions could be confirmed at all intersection points of the fibers. These conditions and results are shown in Table 1.
（実施例５）
実施例２におけるポリエチレン樹脂Ａとポリエチレン樹脂Ｂとの混合樹脂の混合比を、ポリエチレン樹脂Ａ５０質量％、ポリエチレン樹脂Ｂ５０質量％の混合比に変更し、吐出量を２４．０ｇ／分、延伸倍率を４．９６倍に変えた以外は、実施例１と同条件で、１３８ｄｔｅｘ／３０フィラメントの熱融着性繊維を得た。得られた繊維の単繊維の物性は、引張強度は１．４８ｃＮ／ｄｔｅｘ、引張伸度は３３．６％であった。
この熱融着性繊維は、図５のＤＳＣ曲線が示すとおり、ＤＳＣ曲線には融点が９１．２℃であることを示す吸着ピーク１と融点が１２７．６℃であることを示す吸着ピーク２の２つの吸着ピークがあり、吸着ピーク１の大きさが−２．３３４ｃａｌ／ｇであった。また、この熱融着性繊維を筒編機にて編地を作成し、沸騰水で５分間の熱処理を行った。得られた編地を目視で確認したところ、繊維の全ての交点に融着箇所が確認できた。これらの条件及び結果を表１に示す。
(Example 5)
The mixing ratio of the mixed resin of polyethylene resin A and polyethylene resin B in Example 2 is changed to a mixing ratio of 50% by mass of polyethylene resin A and 50% by mass of polyethylene resin B, discharge amount is 24.0 g / min, draw ratio is A thermally fusible fiber of 138 dtex / 30 filaments was obtained under the same conditions as in Example 1 except that it was changed to 4.96 times. The physical properties of the single fiber of the obtained fiber were 1.48 cN / dtex in tensile strength and 33.6% in tensile elongation.
As the DSC curve in FIG. 5 shows, this thermally fusible fiber has an adsorption peak 1 indicating that the melting point is 91.2 ° C. and an adsorption peak 2 indicating that the melting point is 127.6 ° C. in the DSC curve. There were two adsorption peaks of and the size of adsorption peak 1 was -2.334 cal / g. Further, a knitted fabric was made of this heat-fusible fiber with a tubular knitting machine, and heat treatment was performed for 5 minutes with boiling water. When the obtained knitted fabric was visually confirmed, fusion-bonded portions could be confirmed at all intersection points of the fibers. These conditions and results are shown in Table 1.
（比較例１）
実施例２におけるポリエチレン樹脂Ａとポリエチレン樹脂Ｂとの混合樹脂の混合比を、ポリエチレン樹脂Ａ４０質量％、ポリエチレン樹脂Ｂ６０質量％の混合比に変更し、延伸倍率を４．９５倍に変えた以外は、実施例１と同条件で、２３５ｄｔｅｘ／３０フィラメントの熱融着性繊維を得た。得られた繊維の単繊維物性は、引張強度は１．７４ｃＮ／ｄｔｅｘ、引張伸度は６８．０％であった。
この熱融着性繊維は、図６のＤＳＣ曲線が示すとおり、ＤＳＣ曲線には融点が９７．２℃であることを示す吸着ピーク１と融点が１２７．８℃であることを示す吸着ピーク２の２つの吸着ピークがあり、吸着ピーク１の大きさが−０．０７８ｃａｌ／ｇであった。
また、この熱融着性繊維を筒編機にて編地を作成し、沸騰水で５分間の熱処理を行った。得られた編地を目視で確認したところ、繊維の全ての交点に融着箇所は確認できなかった。これらの条件及び結果を表１に示す。
(Comparative example 1)
The mixing ratio of the mixed resin of polyethylene resin A and polyethylene resin B in Example 2 was changed to a mixing ratio of 40% by mass of polyethylene resin A and 60% by mass of polyethylene resin B, and the draw ratio was changed to 4.95. Under the same conditions as in Example 1, heat-sealable fibers of 235 dtex / 30 filaments were obtained. With regard to single fiber physical properties of the obtained fiber, the tensile strength was 1.74 cN / dtex, and the tensile elongation was 68.0%.
As the DSC curve in FIG. 6 shows, this thermally fusible fiber has an adsorption peak 1 indicating that the melting point is 97.2 ° C. and an adsorption peak 2 indicating that the melting point is 127.8 ° C. in the DSC curve. There were two adsorption peaks of and the size of adsorption peak 1 was -0.078 cal / g.
Further, a knitted fabric was made of this heat-fusible fiber with a tubular knitting machine, and heat treatment was performed for 5 minutes with boiling water. When the obtained knitted fabric was visually confirmed, no fused portion could be confirmed at all the intersection points of the fibers. These conditions and results are shown in Table 1.
（比較例２）
実施例２にて高融点樹脂として使用したポリエチレン樹脂Ｂを準備し、延伸倍率を３．０２倍、延伸温度を８０℃、熱セット温度を８５℃に変えた以外は、実施例１と同条件で、３８５ｄｔｅｘ／３０フィラメントの熱融着性繊維を得た。得られた繊維の単繊維物性は、引張強度は１．８３ｃＮ／ｄｔｅｘ、引張伸度は７６．１％であった。
この熱融着性繊維を筒編機にて編地を作成し、沸騰水で５分間の熱処理を行った。得られた編地を目視で確認したところ、繊維の全ての交点に融着箇所は確認できなかった。これらの条件及び結果を表１に示す。
なお、この熱融着性繊維の融点については、使用したポリエチレン樹脂Ｂより、融点が１００℃を超えることが明らかであり、繊維の融点は未測定である。
(Comparative example 2)
A polyethylene resin B used as a high melting point resin in Example 2 is prepared, and the conditions are the same as in Example 1 except that the stretching ratio is 3.02, the stretching temperature is 80 ° C., and the heat setting temperature is 85 ° C. Thus, 385 dtex / 30 filaments of heat fusible fiber were obtained. With respect to single fiber physical properties of the obtained fiber, the tensile strength was 1.83 cN / dtex, and the tensile elongation was 76.1%.
The heat fusible fiber was used to make a knitted fabric with a cylinder knitting machine, and heat treatment was performed with boiling water for 5 minutes. When the obtained knitted fabric was visually confirmed, no fused portion could be confirmed at all the intersection points of the fibers. These conditions and results are shown in Table 1.
As for the melting point of the heat-fusible fiber, it is clear from the used polyethylene resin B that the melting point exceeds 100 ° C., and the melting point of the fiber is not measured.
本発明の低融点熱融着性繊維は、１００℃未満の温度で融着する融点が１００℃未満の熱融着性繊維であることから、常圧の沸騰水での融着加工も可能となり、既存の熱処理設備が利用でき、また加工エネルギーの効率化や加工コストを低下させることができ、その応用範囲を拡大することができる。
The low melting point heat fusible fiber of the present invention is a heat fusible fiber having a melting point of less than 100 ° C. which is fused at a temperature of less than 100 ° C. The existing heat treatment equipment can be used, and the efficiency of processing energy and the processing cost can be reduced, and the range of application can be expanded.
Claims (8)
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|---|---|---|---|---|
| JPH10130991A (en) * | 1996-10-31 | 1998-05-19 | Nippon Porikemu Kk | Nonwoven fabric or woven or knitted fabric having thermally bonded crossing part of warp and weft and laminate using the same |
| JPH11140766A (en) * | 1997-11-13 | 1999-05-25 | Oji Paper Co Ltd | Polyolefin conjugated continuous filament nonwoven fabric |
| JP2011506778A (en) * | 2007-12-14 | 2011-03-03 | Ｅｓファイバービジョンズ株式会社 | Composite fiber having low-temperature processability, nonwoven fabric and molded body using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10130991A (en) * | 1996-10-31 | 1998-05-19 | Nippon Porikemu Kk | Nonwoven fabric or woven or knitted fabric having thermally bonded crossing part of warp and weft and laminate using the same |
| JPH11140766A (en) * | 1997-11-13 | 1999-05-25 | Oji Paper Co Ltd | Polyolefin conjugated continuous filament nonwoven fabric |
| JP2011506778A (en) * | 2007-12-14 | 2011-03-03 | Ｅｓファイバービジョンズ株式会社 | Composite fiber having low-temperature processability, nonwoven fabric and molded body using the same |
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