| 摘要 |
Provided is a dripping inhibitor excellent in handling characteristics. The present invention provides a dripping inhibitor including a modified polytetrafluoroethylene, the inhibitor having an average particle size of 300 to 800 μm, an apparent density of 0.40 to 0.52 g/ml, a compression ratio of 1.20 or less, an aggregate disintegration degree with 50-sec vibration of 70% or more, a cylinder extrusion pressure at a reduction ratio 1500 of 80 MPa or less, and a standard specific gravity (SSG) of 2.140 to 2.230. |
| 主权项 |
1. A dripping inhibitor comprising:
a modified polytetrafluoroethylene, the inhibitor having an average particle size of 300 to 800 μm, an apparent density of 0.40 to 0.52 g/ml, a compression ratio of 1.20 or less, an aggregate disintegration degree with 50-sec vibration of 70% or more, a cylinder extrusion pressure at a reduction ratio of 1500 of 80 MPa or less, and a standard specific gravity (SSG) of 2.140 to 2.230, the modified polytetrafluoroethylene comprising tetrafluoroethylene and a modifying monomer other than tetrafluoroethylene, the modified polytetrafluoroethylene having a melting point of 325 to 347° C., the modified polytetrafluoroethylene comprising 1% by mass or less of a modifying monomer unit relative to total monomer units therein, and the modifying monomer is selected from the group consisting of perfluoroolefins, chlorofluoroolefins, hydrgogen-containing fluoroolefins, perfluorovinyl ethers, perfluoroalkyl ethylenes, and ethylene. |
