Preparation of microfibers by using a carbon dioxide laser and analysis of superstructure for obtained microfibers

二氧化碳激光制备微纤维及所得微纤维的超结构分析

• 批准号: 15350131
• 负责人: SUZUKI Akihiro
• 金额: $ 8.9万
• 依托单位: University of Yamanashi
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15350131/
• 关键词: Microfiber; Carbon dioxide CO_2 laser-thinning; Nonwoven fabric; Poly(ethylene terephthalate); Poly(L-lactic acid); Poly(glycolic acid); Zone-drawing and zone-annealing; High-modulus and high strength; ポログリコール酸; 極細繊維; 炭酸ガスレーザー; ポリエチレンテレフタレート

We succeeded in producing microfibers, such as poly(ethylene terephthalate) (PET), nylon 6, isotactic polypropylene (i-PP), poly(L-lactic acid) (PLLA), and poly(glycolic acid) fibers, by a continuous thinning method using a carbon dioxide (CO_2) laser. A laser-thinning apparatus to continuously prepare the microfiber was developed in our laboratory and consists of fiber supplying and winding spools, a continuous wave CO_2 laser emitter, a supplying system of fibers, and a traverse. The laser-thinning apparatus could produce the microfiber in the range of 100 m・min^<-1> to 2,500 m・min^<-1>. The diameter of the laser-thinned microfiber decreased with increasing a winding speed, and its birefringence increased with increasing the winding one. When the nylon 6 microfiber obtained by irradiating the laser operated at a power density of 19.8 W・cm^<-2> to the undrawn nylon 6 fiber supplied at 0.32 m・min^<-1> was wound up at 848 m・min^<-1>, the obtained microfiber had a diameter of 3.2 μm and … More a birefringence of 47 x 10^<-3>. The draw ratio calculated from the supplying and the winding speeds was 2650 times. The SEM showed that the microfiber obtained by the laser-thinning apparatus had a smooth surface without a surface roughened by a laser-ablation and is uniform in diameter. The developed apparatus could more easily produce the microfiber when compared with the conventional technology such as a conjugate spinning, an islands-in-a-sea type fiber spinning, a melt blowing, and a flash spinning.A zone-drawing and zone-annealing method was applied to the PET microfiber obtained by using the CO_2 laser-thinning in order to develop its mechanical properties. The microfiber used for the zone-drawing and the zone-annealing was prepared by winding at 1,386 m/min the microfiber that was obtained by irradiating the laser at 18.1 W/cm^2 and had a diameter of 2.8 μm and a birefringence of 0.097. The zone-drawing was carried out at a drawing temperature of 105 ℃ under an applied tension of 53 MPa, and the zone-annealing at 155 ℃ under 195 MPa. The zone-drawing and the zone-annealing were carried out at a treating speed of 0.21 m/min. The zone-annealed microfiber finally obtained had a diameter of 2 μm, a birefringence of 0.234, a tensile modulus of 17.9 GPa, and a tensile strength of 1.1 GPa.The CO_2 laser-thinning method was applied to PET fiber to produce web formed by PET microfiber. The apparatus used for the preparation of microfiber web consists of fiber supplying spool, a continuous wave CO_2 laser emitter, air gun, and a net conveyor to collect the microfiber web. The diameter of microfiber web was depended on a supplying speed the air supply to the air gun, and laser power. Nonwoven fabrics were obtained by heating the collected microfiber web at 190 ℃ under constant length and obtained nonwovens were formed by continuous filament with a uniform diameter. Less

我们通过使用二氧化碳（CO_2）激光的连续细化方法，成功生产了聚对苯二甲酸乙二醇酯（PET）、尼龙6、等规聚丙烯（i-PP）、聚（L-乳酸）（PLLA）和聚（乙醇酸）纤维等超细纤维。本实验室研制了一种连续制备超细纤维的激光细化装置，该装置由光纤供给和缠绕线轴、连续波CO_2激光发射器、光纤供给系统和横梁组成。激光细化设备可以生产100 m·min^<-1>至2,500 m·min^<-1>范围内的微纤维。激光细化微纤维的直径随着缠绕速度的增加而减小，其双折射率随着缠绕速度的增加而增加。对以0.32m·min^<-1>供给的未拉伸尼龙6纤维照射功率密度为19.8W·cm^<-2>的激光而得到的尼龙6微纤维，以848m·min^<-1>卷取时，得到的微纤维的直径为3.2μm，双折射率为47×。 10^<-3>。由供给速度和卷绕速度算出的拉伸倍率为2650倍。 SEM结果表明，采用激光细化装置得到的微纤维表面光滑，没有激光烧蚀造成的表面粗糙化现象，且直径均匀。与共轭纺丝、海岛型纤维纺丝、熔喷纺丝、闪蒸纺丝等传统技术相比，所开发的设备可以更容易地生产超细纤维。采用区域拉伸和区域退火方法对CO_2激光细化获得的PET超细纤维进行区域拉伸和区域退火，以提高其机械性能。用于区域拉伸和区域退火的微纤维是通过以1,386m/min的速度卷绕通过以18.1W/cm^2照射激光而获得的直径为2.8μm、双折射率为0.097的微纤维来制备的。区域拉拔在拉拔温度105℃、施加张力53MPa下进行，区域退火在155℃、195MPa下进行。区域拉伸和区域退火以0.21m/min的处理速度进行。最终获得的区域退火超细纤维直径为2μm，双折射率为0.234，拉伸模量为17.9GPa，拉伸强度为1.1GPa。采用CO_2激光减薄方法对PET纤维进行加工，生产出PET超细纤维成网。用于制备超细纤维网的装置由纤维供给线轴、连续波CO_2激光发射器、气枪和用于收集超细纤维网的网输送机组成。微纤维网的直径取决于气枪的供气速度和激光功率。将收集的超细纤维网在190℃恒温下加热得到非织造布，所得非织造布由直径均匀的连续长丝形成。较少的

项目成果

PET microfiber prepared by carbon dioxide laser heating

二氧化碳激光加热制备PET超细纤维

• 发表时间: 2003
• 期刊: J.Appl.Polym.Sci. 88
• 作者: A.Suzuki;N.Mochizuki
• 通讯作者: N.Mochizuki

ナノファイバーテクノロジーを用いた高度産業発掘戦略

利用纳米纤维技术的先进工业发现策略

• 发表时间: 2004
• 作者: 本宮達也;鈴木章泰 他58名
• 通讯作者: 鈴木章泰 他58名

A.Suzuki, K.Kamata: "Nylon 6 Microfiber Prepared by Carbon Dioxide Laser Heating"J.Appl.Polym.Sci.. 92. 1449-1453 (2004)

A.Suzuki, K.Kamata：“二氧化碳激光加热制备尼龙 6 微纤维”J.Appl.Polym.Sci.. 92. 1449-1453 (2004)

Isotactic polypropylene microfiber prepared by carbon dioxide laser-heating

二氧化碳激光加热制备等规聚丙烯微纤维

• 发表时间: 2004
• 期刊: J.Appl.Polym.Sci. 92
• 作者: A.Suzuki;S.Narusue
• 通讯作者: S.Narusue

高分子熱物性・熱分析ノウハウ集

聚合物热物性/热分析知识集锦

• 发表时间: 2004
• 作者: 吉田博久;鈴木章泰 他35名
• 通讯作者: 鈴木章泰 他35名