PRESSURE ROLLER

• Main Authors: ASAMI TAKAHIRO, NAKAMURA RINA
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• Subjects: BEARINGS; BLASTING; CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOLOGRAPHY; LIGHTING; MAGNETOGRAPHY; MECHANICAL ENGINEERING; PHOTOGRAPHY; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a pressure roller having an elastic body layer around a core material, the elastic body layer including at least two layers of silicone rubber and the pressure roller exhibiting excellent durability by preventing the fatigue breakage of the elastic body layer near the core material.SOLUTION: A pressure roller 10 includes a core material 12 and an elastic body layer 14 around the core material 12. The elastic body layer 14 is made of at least two layers of silicone rubber, and the outermost layer 14a is made of a continuous air bubbles silicone rubber layer. When the hardness of the silicone rubber layers other than the outermost layer is denoted by Hno, the hardness of the continuous air bubbles silicone rubber layer of the outermost layer is denoted by Ho, the loss coefficient of the silicone rubber layer other than the outermost layer is denoted by tanδno, and the loss coefficient of the continuous air bubbles silicone rubber layer of the outermost layer is denoted by tanδo, the pressure roller satisfies the relation of Hno>Ho or Hno≤Ho and tanδno>tanδo.SELECTED DRAWING: Figure 1 【課題】芯材の外周に弾性体層を備え、弾性体層が２層以上のシリコーンゴム層からなる加圧ローラにおいて、芯材近傍における弾性体層の疲労破壊を防止することで、耐久性に優れた加圧ローラを提供する。【解決手段】加圧ローラ１０は、芯材１２と、芯材１２の外周に形成された弾性体層１４を備え、弾性体層１４は、２層以上のシリコーンゴム層からなり、最外層１４ａは、連続気泡シリコーンゴム層からなり、最外層以外のシリコーンゴム層の硬さをＨｎｏ、最外層の連続気泡シリコーンゴム層の硬さをＨｏ、最外層以外のシリコーンゴム層の損失係数をｔａｎδｎｏ、最外層の連続気泡シリコーンゴム層の損失係数をｔａｎδｏとしたときに、Ｈｎｏ＞Ｈｏ、もしくは、Ｈｎｏ≦Ｈｏかつｔａｎδｎｏ＞ｔａｎδｏの関係を満たす加圧ローラである。【選択図】図１