JP6854487B2 - 生分解性脂肪族ポリエステル系繊維の製造方法 - Google Patents
生分解性脂肪族ポリエステル系繊維の製造方法 Download PDFInfo
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- JP6854487B2 JP6854487B2 JP2017561137A JP2017561137A JP6854487B2 JP 6854487 B2 JP6854487 B2 JP 6854487B2 JP 2017561137 A JP2017561137 A JP 2017561137A JP 2017561137 A JP2017561137 A JP 2017561137A JP 6854487 B2 JP6854487 B2 JP 6854487B2
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- 238000009776 industrial production Methods 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 description 1
- 229910001463 metal phosphate Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- WCYAALZQFZMMOM-UHFFFAOYSA-N methanol;sulfuric acid Chemical compound OC.OS(O)(=O)=O WCYAALZQFZMMOM-UHFFFAOYSA-N 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003346 palm kernel oil Substances 0.000 description 1
- 235000019865 palm kernel oil Nutrition 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000013502 plastic waste Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- UQDJGEHQDNVPGU-UHFFFAOYSA-N serine phosphoethanolamine Chemical compound [NH3+]CCOP([O-])(=O)OCC([NH3+])C([O-])=O UQDJGEHQDNVPGU-UHFFFAOYSA-N 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229950006451 sorbitan laurate Drugs 0.000 description 1
- 235000011067 sorbitan monolaureate Nutrition 0.000 description 1
- 229950011392 sorbitan stearate Drugs 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000012137 tryptone Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000012138 yeast extract Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
- D01F6/625—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters derived from hydroxy-carboxylic acids, e.g. lactones
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
- D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/009—Condensation or reaction polymers
- D04H3/011—Polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0083—Nucleating agents promoting the crystallisation of the polymer matrix
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/12—Physical properties biodegradable
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Biological Depolymerization Polymers (AREA)
- Artificial Filaments (AREA)
- Nonwoven Fabrics (AREA)
Description
[−CHR−CH2−CO−O−] (1)
(式中、RはCnH2n+1で表されるアルキル基で、nは1以上15以下の整数である。)、
で示される繰り返し単位を含む、前記生分解性脂肪族ポリエステル系繊維に関する。
ポリヒドロキシアルカノエートは、微生物から生産される微生物産生PHAから選択される1種以上である。
本発明で用いられる結晶核剤は、ペンタエリスリトールを含有するものである。ペンタエリスリトールは、生分解性樹脂の結晶化速度の改善効果や生分解性樹脂との相溶性及び親和性に優れるため、得られるポリエステル繊維は引張強度が高く、その製造工程においてもサクション性に優れ、紡糸性および生産性に優れる。
本発明で用いられる滑剤は、ベヘン酸アミド、ステアリン酸アミド、エルカ酸アミド及びオレイン酸アミドからなる群より選択される少なくとも1種を含有する。これにより、得られる繊維は、滑性、特に外部滑性を備える。また、ベヘン酸アミド、ステアリン酸アミド、エルカ酸アミド及びオレイン酸アミドは、入手しやすいという利点もある。
本発明の生分解性ポリエステル系繊維は、ポリヒドロキシアルカノエートと結晶核剤と滑剤の他、得られる生分解性ポリエステル系繊維の特徴を損なわない程度で、可塑剤;無機充填剤;酸化防止剤;紫外線吸収剤;染料及び顔料などの着色剤;または帯電防止剤などの他の成分を含有してもよい。
本発明の生分解性ポリエステル系繊維を得る方法は、一般的に用いられる溶融紡糸方法を採用することができ、特に制限はないが、例えば、溶融押出機などを用いて、ポリヒドロキシアルカノエートと結晶核剤と滑剤とを含有する組成物を溶融し、紡糸ノズルから押出した後、i)高速の引き取りロールにより延伸しながら引き取る高速溶融紡糸や、ii)第一の引き取りロールにて引き取った後に、より高速で引き取る複数の引き取りロールによって第二、さらには必要に応じ、第三の引き取りロールによって巻き取った後に連続的に延伸する高速インライン延伸紡糸、iii)空気エジェクタにより空気延伸し、引き取りロールやベルトに吹き付け、不織布を得るスパンボンド法などが使用できる。
培養生産にはKNK−005株(米国特許US7384766参照)を用いた。
KNK−631株(国際公開第2009/145164参照)および炭素源としてパーム核油を用いた以外は、製造例1と同様の方法でポリヒドロキシアルカノエートA2であるP3HB3HHを得た。ポリヒドロキシアルカノエートA2は、3−ヒドロキシヘキサノエート(3HH)のモノマー比率が11.4モル%、3−ヒドロキシブチレート(3HB)のモノマー比率が88.6モル%のP3HB3HHであった。GPCで測定した重量平均分子量Mwは33万であり、融点は131℃であった。
製造例1、2で得られたP3HB3HH(100重量部)及びその他の成分を表1に示す組成比でドライブレンドし、東芝機械社製の2軸押出機(TEM26SS)を用いて130〜160℃で溶融混錬してペレット化した。
配合例1〜12に示す組成比にて得られたペレットを、スクリュー径20mmの1軸押出機で溶融し、ギアポンプで流量を調整し、溶融紡糸温度160℃で、開口面積が0.2mm2の紡糸孔を4個有する紡糸ダイスから雰囲気温度25℃に1孔あたりの樹脂の吐出量=2.5g/min/holeで押し出し、25℃の巻き取りロールを介して、表2の各実施例および比較例に記載の引き取り速度で引き取り、ポリエステル系繊維を得た。なお、この時の紡糸機内部での樹脂の滞在時間は14分であった。また、いずれの配合例によるペレットを用いたか、および引き取り速度等の製造条件は表2に示す。
サクション性は、各実施例および比較例のポリエステル系繊維の製造時に、ダイスの4個の紡糸孔から吐出された糸を引き取りロールに巻くために、サクションガンで引き取った状態を目視評価した。
◎:繊維がサクションガンに張り付かず、繊維が引き取れる。
○:初期に繊維がサクションガンに張り付くことがあるが、引取りが安定すると張り付かず、繊維が引き取れる。
△:初期は繊維が引き取れるが、10秒以内にサクションガンに固着するか、繊維が断線する。
×:繊維がサクションガンに固着する、および/または、繊維が断線する。
得られた繊維は、島津社の引張測定装置オートグラフAG−Iを用いて、以下の条件で引張強度を測定した。すなわち、各実施例および比較例により得られたポリエステル系繊維をサンプルとして、各サンプルの初期長を20mmとし、定格容量5Nのロードセルを用い、20mm/minの速度で測定した。
各配合例で得られたペレットを、スクリュー径20mmの1軸押出機で溶融し、ギアポンプで流量を調整し、溶融紡糸温度160℃で、開口面積が0.2mm2の紡糸孔を3個有する紡糸ダイスから雰囲気温度25℃に対して、1孔あたりの樹脂の吐出量=3.3g/min/holeで押し出し、各実施例および比較例について表3に記載の速度で50℃の第一の引き取りロール(第一ロール引取り速度)で引取った後、連続して、50℃の第二の引き取りロールで、同様に表3に記載の引き取り速度(第二ロール引取り速度)で引き取り、ポリエステル系繊維を得た。なお、この時の紡糸機内部での樹脂の滞在時間は14分であった。また、いずれの配合例によるペレットを用いたか、および引き取り速度等の製造条件は表3に示す。
延伸倍率は、以下の式から計算される。
延伸倍率=第二の引き取りロールの引き取り速度/第一の引き取りロールの引き取り速度
紡糸性は、各実施例および比較例のポリエステル系繊維の製造時に、紡糸中のポリエステル系繊維の状態を目視評価した。
◎:繊維がロールに張り付かず、かつ個々の繊維が互着せずに1本1本分離できる。
○:繊維がロールに張り付かず、かつ個々の繊維に部分的に互着が見られるが、ほぐせば1本1本分離できる。
△:繊維がロールに貼り付かないが、個々の繊維に部分的な互着が見られ、互着部分が分離できない。
×:繊維がロールに固着する、および/または、引取れないため、取得不可である。
得られた繊維は、島津社の引張測定装置オートグラフAG−Iを用いて、以下の条件で引張強度を測定した。すなわち、各実施例および比較例により得られたポリエステル系繊維をサンプルとして、各サンプルの初期長を20mmとし、定格容量5Nのロードセルを用い、20mm/minの速度で測定した。結果は表3に示した。
各配合例で得られたペレットを、スクリュー径20mmの1軸押出機で溶融し、ギアポンプで流量を調整し、溶融紡糸温度160℃で、開口面積が0.2mm2の紡糸孔を4個有する紡糸ダイスから雰囲気温度25℃に1孔あたりの樹脂の吐出量=2.5g/min/holeで押し出し、0.8mm径空気エジェクタにて空気延伸し、平織り金網に吹きつけ、金網を手動で移動させることにより、不織布を得た。なお、いずれの配合例によるペレットを用いたか、および空気延伸速度等の製造条件は表4に示す。
得られた不織布の外観を観察し、成形性を目視で評価した。結果は表4に示した。
○:金網に繊維が均質に広がり、繊維同士が融着して、収縮が見られない。
△:金網に繊維が均質に広がるが、冷却に伴って、収縮する。
×:金網に繊維が均質に広がらず、冷却に伴って、収縮し、塊状になる。
Claims (10)
- 生分解性脂肪族ポリエステル系繊維の製造方法であって、
紡糸時に130℃以上190℃以下の温度で紡糸ダイスから押出され、300m/分以上4,000m/分以下の引き取り速度で第一の引き取りロールにより引き取られ、連続して、600m/分以上7,000m/分以下の引き取り速度で第二の引き取りロールに引き取られることで、延伸紡糸し、
前記生分解性脂肪族ポリエステル系繊維は、ポリヒドロキシアルカノエートと結晶核剤と滑剤とを含有し、
前記結晶核剤がペンタエリスリトールを含有し、
前記滑剤が、ベヘン酸アミド、ステアリン酸アミド、エルカ酸アミド及びオレイン酸アミドからなる群より選択される少なくとも1種を含有する、生分解性脂肪族ポリエステル系繊維の製造方法。 - 前記結晶核剤の含有量が、前記ポリヒドロキシアルカノエート100重量部に対して、0.05重量部以上12重量部以下である、請求項1に記載の生分解性脂肪族ポリエステル系繊維の製造方法。
- 前記滑剤の含有量が、前記ポリヒドロキシアルカノエート100重量部に対して、0.5重量部を超え10重量部以下である、請求項1または2に記載の生分解性脂肪族ポリエステル系繊維の製造方法。
- 前記滑剤がエルカ酸アミドを含有する、請求項1〜3の何れか1項に記載の生分解性脂肪族ポリエステル系繊維の製造方法。
- 前記ポリヒドロキシアルカノエートが、下記一般式(1)
[−CHR−CH2−CO−O−] (1)
(式中、RはCnH2n+1で表されるアルキル基で、nは1以上15以下の整数である。)、
で示される繰り返し単位を含む、請求項1〜4の何れか1項に記載の生分解性脂肪族ポリエステル系繊維の製造方法。 - 前記ポリヒドロキシアルカノエートが、ポリ(3−ヒドロキシ酪酸)、ポリ(3−ヒドロキシ酪酸−コ−3−ヒドロキシ吉草酸)、ポリ(3−ヒドロキシ酪酸−コ−3−ヒドロキシ吉草酸−コ−3−ヒドロキシヘキサン酸)、ポリ(3−ヒドロキシ酪酸−コ−3−ヒドロキシヘキサン酸)及びポリ(3−ヒドロキシ酪酸−コ−4−ヒドロキシ酪酸)から選択される1種以上である、請求項1〜5の何れか1項に記載の生分解性脂肪族ポリエステル系繊維の製造方法。
- 前記ポリヒドロキシアルカノエートが、ポリ(3−ヒドロキシ酪酸−コ−3−ヒドロキシヘキサン酸)である、請求項1〜6の何れか1項に記載の生分解性脂肪族ポリエステル系繊維の製造方法。
- 前記ポリ(3−ヒドロキシ酪酸−コ−3−ヒドロキシヘキサン酸)における3−ヒドロキシ酪酸のモノマー比率が99.5モル%以下85.0モル%以上である、請求項7に記載の生分解性脂肪族ポリエステル系繊維の製造方法。
- 前記ポリヒドロキシアルカノエートの160℃、5kg荷重で測定したメルトフローレートが0.1以上100以下である、請求項1〜8の何れか1項に記載の生分解性脂肪族ポリエステル系繊維の製造方法。
- 前記紡糸ダイスの開口面積が0.03mm2以上3.5mm2以下である、請求項1〜9の何れか1項に記載の生分解性脂肪族ポリエステル系繊維の製造方法。
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