METHOD FOR PRODUCING MIXTURE PTFE YARN AND MIXTURE PTFE YARN PRODUCED BY THE PRODUCTION METHOD, AND REINFORCED MIXTURE PTFE YARN AND METHOD FOR REINFORCING MIXTURE PTFE YARN

• Main Authors: TSUKAMOTO HIROAKI, TSUKAMOTO KATSURO
• Format: Patent
• Language: English; Japanese
• Published: 09.11.2017
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, ORYARNS; MECHANICAL FINISHING OF YARNS OR ROPES; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES; WARPING OR BEAMING; YARNS; YARNS OR THREADS

PROBLEM TO BE SOLVED: To provide a method for producing a mixture polytetrafluoroethylene (PTFE) yarn; a PTFE yarn which is produced by the production method and is excellent in tensile strength; and a method for reinforcing the PTFE yarn.SOLUTION: A method for producing a mixture PTFE yarn using mixture PTFE powder containing 73-95 wt.% PTFE, 3-25 wt.% MoS, 1-5 wt.% of AlOand 1-5 wt.% of Al(OH)includes: a heat insulation adjustment step of putting kerosine as a solvent into the mixture PTFE powder to keeping a temperature of the mixture PTFE powder; an extrusion step of extruding the mixture PTFE powder of which the temperature is adjusted to be kept to a rod of which a cylinder temperature is 70-90°C and a cross section has a circular or oval shape; a rolling step of rolling the rod into a sheet shape; a folding step of folding the sheet in a multiple form, and passing the folded sheet through an oven at 250-270°C at a speed of 10-40 cm/s; and a drawing step of heating the folded sheet to 450-500°C, and then drawing the heated sheet in a multiple stages at a drawing ratio of 200-600%.SELECTED DRAWING: Figure 1 【課題】混合物ポリテトラフルオロエチレン（ＰＴＦＥ）糸の製造方法と、該製造方法によって製造された、引張強度に優れたＰＴＦＥ糸及びＰＴＦＥ糸の強化方法の提供。【解決手段】ＰＴＦＥ：７３〜９５ｗｔ％、ＭｏＳ２：３〜２５ｗｔ％、Ａｌ２Ｏ３：１〜５ｗｔ％及びＡｌ（ＯＨ）３：１〜５ｗｔ％からなる混合物ＰＴＦＥ粉体を用いた混合物ＰＴＦＥ糸製造方法で、混合物ＰＴＦＥ粉体に溶剤のケロシンを入れて保温する保温調整工程と、保温調整された混合物ＰＴＦＥ粉体をシリンダー温度７０〜９０℃で、断面が円形又は楕円形のロッドに押し出す押出工程と、ロッドをシート状に圧延する圧延工程と、シートを多重に折り畳んで１０〜４０ｃｍ／ｓの速度で２５０〜２７０℃のオーブンに通す折り畳み工程と、折り畳んだシートを４５０〜５００℃に加熱後、２００〜６００％の延伸倍率に多段延伸する延伸工程と、を含む、ＰＴＦＥ糸の製造方法。【選択図】図１