公开(公告)号：US08801982B2

公开(公告)日：2014-08-12

申请号：US13522742

申请日：2011-01-27

申请人： Michel Cassart ,  Francis Couget ,  Elena Prats

发明人： Michel Cassart ,  Francis Couget ,  Elena Prats

IPC分类号： C08J9/16

CPC分类号： B29C47/0011 ,  B29B9/06 ,  B29C37/0096 ,  B29C44/3461 ,  B29C2793/0027 ,  B29C2793/009 ,  B29K2025/06 ,  B29L2031/10 ,  B29L2031/772 ,  C08J9/12 ,  C08J9/16 ,  C08J2201/03 ,  C08J2325/02 ,  C08J2351/04 ,  C08J2353/02 ,  C08J2355/02

摘要： A method for producing expandable pellets can include introducing a vinyl aromatic polymer and an expandable agent to a pelletizer (L). The pelletizer (L) can have a die plate having a holes of large diameter. During the start-up of the production of the expandable pellets, pellets can be produced in the pelletizer (L). When the polymer flow rate is in the operating range of the pelletizer (S), the introduction of the vinyl aromatic polymer and the expandable agent can be switched from the pelletizer (L) to the pelletizer (S). The pelletizer (S) can be operated at conditions effective to produce the expandable pellets. The pelletizer (S) can have a die plate having holes of small diameter. The expandable pellets can be recovered from the pelletizer (S), and the pellets can be recovered from the pelletizer (L).

摘要翻译： 制造可发泡颗粒的方法可以包括将乙烯基芳族聚合物和可发性剂引入造粒机（L）。 造粒机（L）可以具有具有大直径孔的模板。 在可生产的颗粒的生产开始期间，可以在造粒机（L）中生产颗粒。 当聚合物流量处于造粒机（S）的操作范围内时，乙烯基芳族聚合物和可膨胀剂的引入可以从造粒机（L）切换到造粒机（S）。 造粒机（S）可以在有效产生可膨胀颗粒的条件下操作。 造粒机（S）可以具有具有小直径孔的模板。 可以从造粒机（S）回收可发泡颗粒，并且可以从造粒机（L）中回收颗粒。

公开(公告)号：US20130203876A1

公开(公告)日：2013-08-08

申请号：US13522742

申请日：2011-01-27

申请人： Michel Cassart ,  Francis Couget ,  Elena Prats

发明人： Michel Cassart ,  Francis Couget ,  Elena Prats

IPC分类号： C08J9/16

CPC分类号： B29C47/0011 ,  B29B9/06 ,  B29C37/0096 ,  B29C44/3461 ,  B29C2793/0027 ,  B29C2793/009 ,  B29K2025/06 ,  B29L2031/10 ,  B29L2031/772 ,  C08J9/12 ,  C08J9/16 ,  C08J2201/03 ,  C08J2325/02 ,  C08J2351/04 ,  C08J2353/02 ,  C08J2355/02

摘要： The present invention is a method to start-up a process to make expandable vinyl aromatic polymer pellets comprising, a) providing a pelletizer (S) containing means to introduce the molten vinyl aromatic polymer comprising the expandable agent and optionally additives, a die plate having a plurality of holes of small diameter, typically in the range 0.8 to 1.6 mm and cutting means to make pellets, b) providing a pelletizer (L) containing means to introduce the molten vinyl aromatic polymer comprising the expandable agent and optionally additives, a die plate having a plurality of holes of large diameter, typically in the range 3 to 5 mm and cutting means to make pellets, c) sending the expandable vinyl aromatic polymer pellets comprising an expandable agent and optionally additives to the pelletizer (L) until the polymer flow rate is in the operating range of the pelletizer (S) and provided the proportion of expandable agent and optional additives are in the specifications, d) switching the molten vinyl aromatic polymer stream comprising the expandable agent and optionally additives to the pelletizer (S) and operating said pelletizer (S) at conditions effective to produce expandable vinyl aromatic polymer pellets, e) recovering from pelletizer (S) the expandable vinyl aromatic polymer pellets, f) recovering the pellets produced at step c) for optional subsequent recycling in the molten state at step d). In another embodiment while the pelletizer (S) is in production and troubles happen in the introduction of the expanding agent and/or the optional additives or in any equipment or even an equipment needs maintenance the production is switched from the pelletizer (S) to one or more pelletizers (L). When the troubles are over, the production is switched from the pelletizer (L) to the pelletizer (S).In an embodiment while the pelletizer (S) is in production the die plate of the pelletizer (L) having a plurality of holes of large diameter is removed and replaced by a die plate having a plurality of holes of small diameter to convert said pelletizer (L) into a pelletizer (S) capable to produce expandable vinyl aromatic polymer pellets. By way of example said established pelletizer (S) is used during maintenance of the other pelletizer (S).