High temperature-resistant compact-clad fiber and its preparation process, the core of which is coated with polyimide; the core of which is coated with polyimide is coated with a compact-clad outer layer of cross-linked ethylene tetrafluoroethylene copolymer X ETFE; the preparation process of which is as follows: the core of the fiber is divided into single-mode and multi-mode, single-mode structure 9/125 um, multi-mode structure 50/125 um or 62.5/125 um; the coating layer is coated with polyimide and the resistance of polyimide coating. Temperature grade is 65 ~+200 and the outer diameter of the coating is 155 um. The coating enables the tightly packed optical fibers to be laid and installed normally at - 65 C. The tightly packed outer layer is X ETFE, which is a cross-linked ethylene tetrafluoroethylene copolymer extruded by a single thin-wall extruder at high temperature, and the tightly packed outer layer can withstand high temperature of 200 The invention has the following advantages: 1) high temperature resistance; 2) low temperature resistance; 3) high strength; 4) high flame retardant, aging resistance, long life and corrosion resistance.
【技术实现步骤摘要】
耐高温紧包光纤及其制备工艺
本专利技术是耐高温200℃紧包光纤及其制备工艺，产品具有耐高低温-65℃～+200℃、高强度、耐弯曲、抗冲击、耐老化、长寿命、耐腐蚀、阻燃等特性，可在恶劣的环境下提供高可靠服务，适用于航空航天、电子、机载特殊环境条件下的高速信号传输。
技术介绍
目前，常见的民用光纤领域，国内生产的厂家已经很多，技术水平也很成熟。但在军用领域光纤的应用还处在初期发展阶段。主要原因是军用光纤要求较高，不但要求良好的环境和力学性能，如耐高低温、高强度、抗冲击、耐弯曲、长寿命等特殊要求。所以，军用光纤、光缆选用的材料和制造工艺与常规民品有很大区别。耐高温200℃紧包光纤正是考虑军品的应用要求，充分考虑其适用性和安全性，充分考虑高低温、高强度、耐弯曲、抗冲击、耐老化、长寿命、耐腐蚀、阻燃等特殊使用环境要求。
技术实现思路
本专利技术提出的是一种提出耐高温200℃紧包光纤及其制备工艺，其目的旨在光纤纤芯涂覆层采用聚酰亚胺涂覆，比普通光纤纤芯提高了耐热性能，耐温达到200℃；紧包护层采用交联乙烯四氟乙烯共聚物X-ETFE，采用单层薄壁挤出和双层薄壁挤出两种结构，提高了紧...
【技术保护点】
1.耐高温紧包光纤及其制备工艺，其特征是，纤芯的外围是聚酰亚胺涂覆层；聚酰亚胺涂覆层的外围是交联乙烯四氟乙烯共聚物X‑ETFE的紧包外层。
【技术特征摘要】
1.耐高温紧包光纤及其制备工艺，其特征是，纤芯的外围是聚酰亚胺涂覆层；聚酰亚胺涂覆层的外围是交联乙烯四氟乙烯共聚物X-ETFE的紧包外层。2.耐高温紧包光纤制备工艺：其特征是，光纤纤芯分单模和多模，单模结构9/125μm，多模结构50/125μm或62.5...
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