GUIDE ROLLER OF SLIDE DOOR FOR VEHICLE

To provide a guide roller of a slide door for a vehicle which hardly causes damage such as cracks on a surface of a slide-moving face even if the guide roller itself is rolled while being inclined, and can prevent a fall and the exfoliation of the slide-moving layer.SOLUTION: When setting crystallization degrees of synthetic resins in a side-moving face side region, an intermediate region and an interface side region as X1, X2 and X3, respectively, with a region of 25% of a slide-moving layer thickness toward an interface from a slide-moving face of a slide-moving layer up to an outer ring as the side-moving face side region, a region up to 25% of the slide-moving layer thickness toward the slide-moving face from the interface as the interface side region, and a region between the slide-moving face side region and the interface side region as the intermediate region, X2-X1 is lower than 5%, and X2-X3 is lower than 5%. Furthermore, when setting the nano-indenter hardness of the synthetic resins in the slide-moving face side region, the intermediate region and the interface side region as Y1, Y2 and Y3, respectively, Y2 is not lower than 115% of Y1, and Y2 is not lower than 115% of Y3.SELECTED DRAWING: Figure 2 【課題】ガイドロ−ラ自体が傾いたまま転動されても、摺動層の表面に割れ等の損傷が起き難く、摺動層も脱落や剥離を防止することが可能な車両用スライドドアのガイドローラの提供。【解決手段】摺動層の摺動面から外輪との界面に向かって、摺動層厚さの２５％の領域を摺動面側領域、界面から摺動面に向かって摺動層厚さの２５％までの領域を界面側領域、摺動面側領域と前記界面側領域との間の領域を中間領域として、摺動面側領域、中間領域、界面側領域における合成樹脂の結晶化度をそれぞれＸ１、Ｘ２、Ｘ３としたとき、Ｘ２−Ｘ１が５％未満であり、Ｘ２−Ｘ３が５％未満である。さらに、摺動面側領域、中間領域、界面側領域における合成樹脂のナノインデンター硬さをそれぞれＹ１、Ｙ２、Ｙ３としたとき、Ｙ２はＹ１の１１５％以上であり、Ｙ２はＹ３の１１５％以上である。【選択図】図２