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Применить Всего найдено 2. Отображено 2.
12-05-2023 дата публикации

Tubular microporous polypropylene foamed bead and molded part thereof

Номер: CN116102768A
Автор: JIANG FANHUI, ZENG JIA, ZHANG SHANSHAN, SHI YAJIE, XIONG YEZHI, LIU HUANHUAN, GAO HAORUI, ZHU MIN
Принадлежит:

The invention discloses a tubular microporous polypropylene foamed bead and a molded part thereof. A tubular hollow micropore penetrating through the foamed bead is formed in the tubular micropore polypropylene foamed bead. In the pre-pressing stage before steam forming, sufficient internal pressure can be established in the foamed bead within a short time; in the steam forming process, water vapor can easily enter the foamed beads, sufficient heat is provided for the foamed beads to enable the foamed beads to be fully expanded, and a foamed formed workpiece which is more fully sintered and higher in curing degree is obtained; and after the steam forming is finished and the part is demolded, the shrinkage effect generated by cooling the foaming part is relatively small, and the required baking and shaping time is relatively short. Therefore, the tubular microporous polypropylene foamed bead material can greatly reduce the pre-pressing time before molding and the baking time after molding ...

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Номер записи: 1
16-05-2023 дата публикации

Conical microporous polypropylene foamed bead and molded part thereof

Номер: CN116120623A
Автор: JIANG FANHUI, ZENG JIA, ZHANG SHANSHAN, SHI YAJIE, XIONG YEZHI, LIU HUANHUAN, GAO HAORUI, ZHU MIN
Принадлежит:

The invention discloses a conical microporous polypropylene foamed bead and a molded part thereof. The conical microporous polypropylene foamed bead is provided with a conical hollow micropore penetrating through the foamed bead, and in the steam forming process, due to the existence of the conical hollow micropore in the foamed bead, water vapor can easily enter the foamed bead and stay in the foamed bead for a long time, and sufficient heat is provided for the foamed bead. Under the action of hot steam, the foamed beads can be fully expanded under the action of hot steam in a short pre-pressurization time, so that the contact area between the beads is increased, the sintering is more sufficient, and a formed part has a better curing degree. In addition, after the molded part is demolded, due to the existence of the conical hollow micropores, the shrinkage effect generated after the part is cooled is relatively small, and the baking and shaping time required by the foamed part is relatively ...

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Номер записи: 2