3results about How to "Solve sticky" patented technology

The invention discloses a polymerization method of a polypropylene composition, and belongs to the field of polymerization. An olefin monomer comprising propylene is contacted with a catalyst system in the upstream polymerization sections of a gas phase copolymerization reactor to form polymer particles, and a condensing medium is introduced in at least one upstream polymerization section or between or after the upstream polymerization sections; in the upstream polymerization section, the obtained polymer particles and the condensing medium enter the gas phase copolymerization reactor in the form of wet particles, and in the presence of the condensing medium, propylene and alpha-olefin are polymerized in the gas phase copolymerization reactor to obtain the polypropylene composition. The condensing medium can effectively improve heat dissipation of an upstream polymerization section, enables polymer particles to be distributed more uniformly, avoids kettle sticking and caking phenomena caused by generation of local hot spots, can also improve the heat removal capability and space time yield of a gas phase copolymerization reactor, enhances the copolymerization activity of olefin monomers in the gas phase copolymerization reactor, and improves the yield of olefin monomers in the gas phase copolymerization reactor. And the bonding condition of the particle surface is improved.

The invention belongs to the technical field of functional coatings, and particularly relates to an organosilicone hydrophobic and hydrophobic coating and a preparation method thereof. The coating is prepared from the following raw materials: hydrogen-terminated polydimethylsiloxane, vinyl MQ resin, silane coupling agent modified nano silicon dioxide, a catalyst and an organic solvent. The invention also provides a preparation method of the coating and a hydrophobic and hydrophobic coating prepared from the coating. The obtained coating has excellent hydrophobicity and ice hydrophobicity, the problem that the surface of the coating is sticky is effectively solved, and the coating can be widely applied to the fields needing ice prevention and water prevention such as aviation, electric power and traffic. The preparation process is simple, raw materials are easy to obtain, and the method has good industrial application prospects.

The utility model discloses a kind of pillow type cotton soft towel inserts and folds tablet device, to solve the problem of equipment operation due to sticking after cotton soft towel transverse cutting inserts and folds. Device contains support, feeding belt, guide strip, vertically slidable lifting seat is equipped on support, its equipped telescopic clamp jaw consisting of lifting claw and pressure claw. Lifting cylinder drives lifting seat, combined auxiliary, material pressing and clamping cylinder, realize multi-dimensional action of clamp jaw;Lifting claw and pressure claw cooperate, can avoid cotton soft towel sticking, float, guarantee equipment stable operation. At the same time, guide strip and lifting claw are equidistant distribution, ensure that cotton soft towel conveying stress is uniform;Each cylinder cooperation can accurately adjust clamp jaw position and pressure according to cotton soft towel specification, convenient operation, strong adaptability. The device effectively solves the problem of material sticking, reduces equipment failure, improves cotton soft towel processing quality and production efficiency, compact structure and practical.