PURPOSE: To change a soft cushioning material with low repulsion elasticity into a fine shape and covering it in close contact without damaging tissues by forming a draw porous fluororesin sheet made of polytetra fluoroethylene and having specific porosity and thickness.
CONSTITUTION: Polytetra fluoroethylene is preferably used for fluororesin. A cushioning material made of a draw porous fluororesin sheet is formed with one sheet or a laminated body of multiple sheets, and the sheets are integrally stuck by heat fusion or an adhesive for the laminated body. The porosity of the laminated body is set to 75-95%, and its thickness is set to 0.1-1.0mm. The porosity is set to 75-95%, preferably 80-90%. When the porosity is less than 75%, the shape following property and the flexibility at the end section are insufficient. When it exceeds 95%, operability is deteriorated. The average fine hole diameter of the cushioning material is set to 0.1-10μm, preferably 0.2-3.0μm. The thickness is set to 0.1-1-mm, preferably 0.3-0.7mm. When the thickness is less than 0.1mm, the cushioning property is poor. When it exceeds 1mm, operability is deteriorated.
| WO/1997/049370 | PREPARATION TABLE |
| JP3415839 | [Title of Invention] Waste Collection Unit |
| WO/2001/027372 | FIBROUS MATERIAL COMPRISING FIBERS MADE FROM LINEAR, ISOTACTIC POLYMERS |
HAMAZAKI SADAKATSU
TAKAGIWA NOBUO
