公开(公告)号：US20020104678A1

公开(公告)日：2002-08-08

申请号：US09971766

申请日：2001-10-09

Applicant: PIRELLI CAVI E SISTEMI S.p.A.

Inventor： Sergio Belli ,  Luigi Caimi ,  Claudio Bosisio ,  Alberto Bareggi ,  Luca Balconi ,  Giovanni Pozzati

IPC: H01B007/00

CPC classification number: H01B3/441 ,  H01B7/28 ,  Y02A30/14

Abstract: A cable, in particular a cable for electric power transmission or distribution, having an inner layer comprising a self-repairing material with a predetermined cohesiveness and a controlled flowability, so as to re-establish, upon creation of a discontinuity in at least one of the cable coating layers, the continuity in the coating. The discontinuity in the coating can be caused by mechanical abuses of various types, for example accidental impact with cutting tools. Infiltration of moisture and generation of leakage currents, leading to a rapid corrosion of the conductor, are in this way avoided.

公开(公告)号：US20040166190A1

公开(公告)日：2004-08-26

申请号：US10787209

申请日：2004-02-27

Applicant: Pirelli Cavi E Sistemi S.P.A.

Inventor： Sergio Belli ,  Angelo Giuseppe Locatelli ,  Giovanni Pozzati ,  Paolo Veggetti

IPC: B29C047/06 ,  B29C047/88

CPC classification number: B29C47/8815 ,  B29C47/0016 ,  B29C47/02 ,  B29C47/686 ,  B29K2105/16 ,  B29K2995/0016 ,  B29L2031/3462

Abstract: The present invention concerns a process for producting cables, in particular cables for the distribution of electrical energy or cables for telecommunications, more particularly, cables having at least one covering layer comprising a composition of high viscosity. More particularly, the present invention concerns cables having at least one covering layer comprising a polymeric composition comprising a mineral filler capable of imparting one or more specific properties to the aforesaid cables. In accordance with the present invention, said production process comprises the stages of: conveying at least one conducting element inside of an extruder; feeding the polymeric material, optionally premixed with other components of said composition, into said extruder, filtering the material transferred and plasticized by the screw of said extruder; depositing said material onto said at least one conducting element, the filtration operation being performed with a filtration efficiency greater than 0.8, preferably greater than 0.9. The present invention concerns, in addition, an apparatus for the purpose of performing the production process mentioned above.

Abstract translation: 本发明涉及用于生产电缆的方法，特别是用于分配用于电信的电能或电缆的电缆，更具体地，涉及具有至少一个包含高粘度组合物的覆盖层的电缆。 更具体地说，本发明涉及具有至少一个覆盖层的电缆，该覆盖层包括聚合物组合物，该聚合物组合物包含能够赋予上述电缆一个或多个特定性能的矿物填料。 根据本发明，所述制造方法包括以下步骤：在挤出机内输送至少一个导电元件; 将可选地与所述组合物的其它组分预混合的聚合物材料进料到所述挤出机中，过滤由所述挤出机的螺杆转移和增塑的材料; 将所述材料沉积到所述至少一个导电元件上，所述过滤操作以大于0.8，优选大于0.9的过滤效率进行。 本发明另外涉及用于进行上述制造方法的装置。