公开(公告)号：US20050226582A1

公开(公告)日：2005-10-13

申请号：US10512271

申请日：2002-04-24

Applicant: Sandra Nagelvoort ,  Johannes Van Eekelen ,  Adrianus Abel ,  Gouke Geus ,  Duurt Alkema ,  Giacomo Roba ,  Marco Arimondi ,  Lidia Terruzzi ,  Sabrina Fogliani

Inventor： Sandra Nagelvoort ,  Johannes Van Eekelen ,  Adrianus Abel ,  Gouke Geus ,  Duurt Alkema ,  Giacomo Roba ,  Marco Arimondi ,  Lidia Terruzzi ,  Sabrina Fogliani

IPC: C03C25/10 ,  C09D4/06 ,  G02B6/22

CPC classification number: G02B1/10 ,  C03C25/1065 ,  C08F290/06 ,  C09D4/06

Abstract: The present invention relates to a radiation curable coating composition comprising a radiation curable oligomer comprising a backbone derived from polypropylene glycol and a dimer acid based polyester polyol, wherein said coating composition, when cured, is having: a) a hardening temperature (Th) of from −10° C. to about −20° C. and a modulus measured at said Th of lower than 5.0 MPa; or b) a hardening temperature (Th) of from −20° C. to about −30° C. and a modulus measured at said Th of lower than 20.0 MPa; or c) a hardening temperature (Th) of lower than about −30° C. and a modulus measured at said Th of lower than 70.0 MPa.

Abstract translation: 本发明涉及一种可辐射固化涂料组合物，其包含可聚合低聚物，其包含衍生自聚丙二醇的主链和二聚酸基聚酯多元醇，其中所述涂料组合物在固化时具有：a）硬化温度（Th） 从-10℃至约-20℃，并且在所述Th下测量的模量低于5.0MPa; 或b）-20℃至约-30℃的硬化温度（Th），并且在所述Th处测量的模量低于20.0MPa; 或c）低于约-30℃的硬化温度（Th）和在所述Th下测得的模量低于70.0MPa的模量。

公开(公告)号：US4816050A

公开(公告)日：1989-03-28

申请号：US472063

申请日：1983-03-04

Applicant: Giacomo Roba

Inventor： Giacomo Roba

IPC: C03B37/018 ,  G02B6/00

CPC classification number: C03B37/01861 ,  C03B37/01807 ,  C03B37/01846

Abstract: In order to prevent an uncontrolled collapse of a quartz tube whose inner surface is being coated with a vitrifiable substance in making a preform or parison of an optical fiber, one or more streams of carrier gas entraining the ingredients of the coating substance through the quartz tube are supplemented by a stream of supplemental carrier gas whose flow is being continuously controlled to keep the overall mass-flow rate substantially constant. The outer tube diameter is photoelectrically monitored and incipient changes thereof are compensated by controlling a flow of additional carrier or inert gas which does not pass through the tube but joins the traversing gas flow at the tube outlet, inside a solids separator with a restricted exit aperture, to modify the pressure differential across the tube wall.

Abstract translation: 为了防止在制造光纤的预成型件或型坯时内表面被玻璃化物质涂覆的石英管的不受控制的塌陷，一个或多个携带涂料的成分的载气流通过石英管 补充载气，其流动被连续地控制以保持总体质量流速基本上恒定。 外管直径被光电监测，其初始变化通过控制不通过管的附加载体或惰性气体的流动来补偿，但是在具有限制的出口孔的固体分离器内的管出口处连接穿过气流 ，以改变跨越管壁的压力差。

公开(公告)号：US4735826A

公开(公告)日：1988-04-05

申请号：US827271

申请日：1986-02-06

Applicant: Giacomo Roba

Inventor： Giacomo Roba

IPC: C03B37/08 ,  C03B37/029 ,  H05B6/02 ,  H05B6/62 ,  B05D7/22 ,  C23C16/40

CPC classification number: H05B6/62 ,  C03B37/029 ,  C03B2205/64

Abstract: The method of surfacing the heater of a furnace for optical fiber drawing allows elimination of defects in the inner heater surface, which defects give rise to particle emission towards the preform. This is achieved by depositing a thin layer of a mixture of oxides compatible with the material composing the heater.

Abstract translation: 用于光纤拉伸的炉子的加热器的方法可以消除内部加热器表面中的缺陷，这些缺陷导致朝向预成型件的颗粒发射。 这通过沉积与构成加热器的材料相容的氧化物混合物的薄层来实现。

公开(公告)号：US4702759A

公开(公告)日：1987-10-27

申请号：US930804

申请日：1986-11-13

Applicant: Giacomo Roba

Inventor： Giacomo Roba

IPC: G02B6/00 ,  C03B37/027 ,  C03B37/029 ,  C03B37/12 ,  C03C25/10 ,  C03C25/22 ,  C03B37/023 ,  C03C25/02

CPC classification number: C03C25/223 ,  C03B37/02718 ,  C03B37/029 ,  C03C25/107 ,  C03B2205/56 ,  Y02P40/57

Abstract: The method allows surface defect reduction in silica optical-fibres by enriching the external layer by silica bonded carbon atoms within the silica network: SiC.SiO.sub.2. Carbon is obtained from chemical reaction directly during the drawing step.Volume defects are reduced by rapidly cooling the fibre structure heated up to vitrous transition temperature.The apparatus allows the method to be carried out during drawing step.

公开(公告)号：US4414164A

公开(公告)日：1983-11-08

申请号：US185514

申请日：1980-09-09

Applicant: Giacomo Roba ,  Paolo Vergnano

Inventor： Giacomo Roba ,  Paolo Vergnano

IPC: C03B37/018 ,  C03B8/02 ,  C03B37/00 ,  C03B37/016 ,  G02B6/00 ,  B05B13/02

CPC classification number: C03B37/016

Abstract: In order to produce a preform or parison from which an optical fiber can be drawn, a vitrifiable substance such as silicon chloride and a doping agent such as germanium chloride, for example, are fed in liquid form and at room temperature to a spray nozzle together with water or steam for continuous deposition on a relatively rotating and axially reciprocating inner or outer surface of a cylindrical support until that surface is covered with a heavy layer of as yet unvitrified hydrated silica admixed with the doping agent in proportions designed to provide a selected refractive-index profile. The resulting preform, after degassing and separation from the support if necessary, is freed from occluded water molecules by exposure to a flow of hot dehydrating gas which may contain anhydrous compounds and is thereafter collapsed into a solid rod and completely vitrified at high temperatures.

Abstract translation: 为了制造可以拉伸光纤的预制件或型坯，例如可以将玻璃化物质如氯化硅和诸如氯化锗的掺杂剂以液体形式和室温下一起供入喷嘴 用水或蒸汽连续沉积在圆柱形支撑件的相对旋转和轴向往复运动的内表面或外表面上，直到该表面覆盖有与掺杂剂混合的尚未未透水化的水合二氧化硅的重质层，设计成提供选定的折射率 指数资料。 如果需要，将得到的预制件在与载体脱气并分离之后，通过暴露于可能含有无水化合物的热脱水气体的流动而被除去封闭的水分子，然后塌陷成固体棒，并在高温下完全玻璃化。

公开(公告)号：US4389230A

公开(公告)日：1983-06-21

申请号：US273423

申请日：1981-06-15

Applicant: Eros Modone ,  Giacomo Roba

Inventor： Eros Modone ,  Giacomo Roba

IPC: C03B37/00 ,  C03B37/018 ,  C03C13/04 ,  C03C21/00 ,  G02B6/00 ,  C03B37/075

CPC classification number: C03C13/047 ,  C03B37/01853 ,  C03B2201/22 ,  Y10S65/90

Abstract: In order to improve the transmission characteristics of optical fibers drawn from the preforms manufactured by vapor deposition of silica on an inner wall surface of a supporting tube of glass, the tube is subjected to a two-stage heat treatment with deuterium whereby OH.sup.- groups at least on the inner tube surface are isotopically replaced by OD.sup.- groups. This pretreatment can be carried out in the same apparatus which is subsequently used for producing the preform.

Abstract translation: 为了提高从在玻璃的支撑管的内壁表面上气相沉积二氧化硅制成的预成型件所拉伸的光纤的透射特性，将该管用氘进行两级热处理，由此OH-基团在 至少在内管表面上同时代替OD组。 该预处理可以在随后用于生产预成型件的相同装置中进行。