METHOD OF MANUFACTURING PIPE CONNECTOR AND PIPE CONNECTOR

To provide a method of manufacturing a pipe connector in which heating processing on a processed pipe formed of a gray hard vinyl chloride-based resin composition and having heat insulation properties can be performed without spoiling heat insulation properties, and the pipe connector is obtained which has superior heat insulation properties and outward appearance.SOLUTION: A method of manufacturing a pipe connector has a process of performing heating processing on a processed pipe formed of a gray hard vinyl chloride-based resin composition including vinyl chloride-based resin and pigment, wherein the pigment includes at least one kind selected from the group of non-carbon-based inorganic pigment and organic pigment; an infrared reflectance of a surface of the processed pipe is 20% or larger; a ratio SDR of an external diameter (mm) to a thickness (mm) of the processed pipe is 30-36; and a ratio T/SDR of a heating time T (seconds) in use of an infrared heater having output of 500 W obtained by converting a heating time in the heating processing for the ratio SDR is set to 40-150.SELECTED DRAWING: Figure 1 【課題】灰色の硬質塩化ビニル系樹脂組成物で構成され、遮熱性を有する被加工管に、遮熱性を損なうことなく加熱加工を施すことができ、遮熱性及び外観に優れた管継手が得られる管継手の製造方法を提供する。【解決手段】塩化ビニル系樹脂と顔料とを含む灰色の硬質塩化ビニル系樹脂組成物で構成された被加工管に、加熱加工を施す工程を有し、前記顔料が、非カーボン系無機顔料及び有機顔料からなる群から選ばれる少なくとも１種を含み、前記被加工管の表面の赤外線反射率が２０％以上であり、前記被加工管の肉厚（ｍｍ）に対する外径（ｍｍ）の比ＳＤＲが３０〜３６であり、前記加熱加工を施す際の加熱時間を、前記比ＳＤＲに対する、出力５００Ｗの赤外線ヒーターを用いた場合に換算した加熱時間Ｔ（秒）の比Ｔ／ＳＤＲが４０〜１５０となるように設定することを特徴とする管継手の製造方法。【選択図】図１