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    • 1. 发明授权
    • Process of extrusion-coating the central core with an insulator of high
pressure-processed polyethylene
    • 用高压加工聚乙烯绝缘体挤压中心芯的方法
    • US4078111A
    • 1978-03-07
    • US688264
    • 1976-05-20
    • Koji YamaguchiHideaki TakashimaIwao TsurutaniToshio Nagasawa
    • Koji YamaguchiHideaki TakashimaIwao TsurutaniToshio Nagasawa
    • B29C47/88H01B13/016H01B13/14H01B3/30
    • B29C47/8815B29C47/0016B29C47/8895H01B13/14
    • Provided hereinbelow is a process of extrusion-coating the central core, said core being used in a submarine coaxial cable, with an insulator of high pressure-processed polyethylene having a density of from 0.925 to 0.940 g/cm.sup.3 and a melt index of from 0.01 to 0.3 g/10 min with advantages in that said coaxial cable is allowed to be placed on a sea bottom of not less than 500 meters in depth and to effectively transmit alternating current signals with a maximum frequency of not less than 30 MHZ, while attenuation of said signals is reduced, and thus, said coaxial cable has a transmission capacity of not less than 3000 circuits or channels with a frequency band of from 3 to 6 KHz per each circuit or channels, wherein the insulator-covered-core is continuously extruded from an extruder and then is gradually cooled in cooling water troughs to room temperature so that the water content of said insulator, without formation of voids between said central core and said insulator, is reduced by as much as possible.
    • 在下文中提供了一种挤压涂覆中心芯的方法,所述芯用在海底同轴电缆中,其中具有密度为0.925-0.940g / cm 3和熔体指数为0.01的高压加工聚乙烯绝缘体 至0.3g / 10min,其特征在于允许将所述同轴电缆放置在深度不小于500米的海底上,并有效地传输最大频率不小于30MHz的交流信号,同时衰减 的所述信号被减少,因此,所述同轴电缆具有每个电路或通道具有不小于3000个电路或具有3至6KHz频带的通道的传输容量,其中绝缘体覆盖芯被连续挤出 然后在冷却水槽中逐渐冷却至室温,使得所述绝缘体的水含量在所述中心芯和所述绝缘体之间不形成空隙,由此减少 越多越好。
    • 5. 发明授权
    • Laminate film
    • 层压膜
    • US5616420A
    • 1997-04-01
    • US297925
    • 1994-08-31
    • Ryuso YamaokaYoshinori IshiiKunio KondoKazuto WakitaIwao Tsurutani
    • Ryuso YamaokaYoshinori IshiiKunio KondoKazuto WakitaIwao Tsurutani
    • A61J1/05A61J1/00B32B27/32B32B27/08
    • B32B27/32A61J1/10Y10T428/31855Y10T428/31909Y10T428/31913Y10T428/31917Y10T428/31928
    • Disclosed are a laminate film having at least three layers, the three layers being (A) an intermediate layer and (B) two outer layers, the intermediate layer (A) being composed of a resin composition comprising 20 to 100% by weight of an amorphous polyolefin containing at least 50% by weight of a propylene and/or butene-1 and 80 to 0% by weight of a crystalline polypropylene, and the two outer layers (B) being composed of a resin composition comprising a polyolefin and a thermoplastic styrene elastomer, and a laminate film having at least three layers, the three layers being (A) an intermediate layer and (B) two outer layers, the intermediate layer (A) being composed of a resin composition comprising 20 to 100% by weight of an amorphous polyolefin containing at least 50% by weight of a propylene and/or butene-1 and 80 to 0% by weight of a crystalline polypropylene, and the two outer layers (B) being composed of a resin composition comprising a propylene resin and a thermoplastic styrene elastomer.
    • 公开了具有至少三层的层叠膜,三层为(A)中间层和(B)两层外层,中间层(A)由树脂组合物构成,该树脂组合物包含20〜100重量% 含有至少50重量%丙烯和/或丁烯-1和80至0重量%结晶聚丙烯的无定形聚烯烃,两个外层(B)由包含聚烯烃和热塑性塑料的树脂组合物组成 苯乙烯弹性体和具有至少三层的层压膜,三层为(A)中间层和(B)两个外层,中间层(A)由包含20至100重量%的树脂组合物 的包含至少50重量%的丙烯和/或丁烯-1和80至0重量%的结晶聚丙烯的无定形聚烯烃,并且所述两个外层(B)由包含丙烯树脂的树脂组合物 和热塑性苯乙烯 e弹性体。