摘要:
A coated optical fiber can have a primary coating and a secondary coating, where the primary coating can have good microbending resistance and is obtained by curing a composition having a high cure speed. In one example, a coated optical fiber can include as optical fiber, a primary coating and a secondary coating. The optical fiber can have an attenuation increase of less than 0.650 dB/km at 1550 nm, with the primary coating having a modulus retention ratio of at least 0.5, a glass transition temperature of −35° C., and where the primary coating is obtained by curing a primary coating composition having a cure dose to attain 95% of the maximum attainable modulus of less than 0.65 J/cm2.
摘要翻译:涂覆光纤可以具有初级涂层和二次涂层,其中初级涂层可以具有良好的抗微弯曲性,并且通过固化具有高固化速度的组合物获得。 在一个示例中,涂覆的光纤可以包括作为光纤,初级涂层和二次涂层。 光纤可以在1550nm处具有小于0.650dB / km的衰减增加,其中初级涂层的模量保持率至少为0.5,玻璃化转变温度为-35℃,其中初级涂层为 其通过固化具有固化剂量的初级涂料组合物获得小于0.65J / cm 2的最大可获得模量的95%。
摘要:
Inner and outer primary and matrix material compositions which, after curing, exhibit a high degree of uniformity after curing even when the coating is applied onto optical fibers at relatively high shear rates, e.g., such as those experienced at high optical fiber coating line speeds. These compositions are provided in significant part by the selective incorporation of at least one radiation-curable oligomer into the compositions. In particular, and with respect to inner primary coatings, the oligomer should be selected so that the value m of an uncured radiation-curable inner primary coating composition in the equation τ = K λ γ 1 + ( λ γ ) m ( I ) is advantageously equal to or greater than about 0.90.
摘要:
Inner and outer primary and matrix material compositions which, after curing, exhibit a high degree of uniformity after curing even when the coating is applied onto optical fibers at relatively high shear rates, e.g., such as those experienced at high optical fiber coating line speeds. These compositions are provided in significant part by the selective incorporation of at least one radiation-curable oligomer into the compositions. In particular, and with respect to inner primary coatings, the oligomer should be selected so that the value m of an uncured radiation-curable inner primary coating composition in the equation τ = K λγ 1 + ( λγ ) m ( I ) is advantageously equal to or greater than about 0.90.
摘要:
Optical fiber coatings are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be achieved by several means which include by use of additives, by use of radiation-curable oligomers having higher molecular weight, or by use of coatings having certain thermal properties. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
摘要:
Radiation-curable compositions are disclosed which, after cure, are substantially non-yellowing. The compositions are particularly tailored for coating and bundling of optical fibers. A first preferred composition is based on a polyether-type of oligomer diluted with reactive diluents. Isocyanurate structures are included in the composition to raise Tg. A second preferred composition is based on fatty oil comprising (meth)acrylate groups and bisphenol A derivatives comprising (meth)acrylate groups. Photoinitiators can be included to increase cure speed. The formulations do not include material amounts of ingredients which tend to cause yellowing or, in theory, extended conjugation in the cured compositions.