Method for continuously preparing phase step type plastics optical fibre by multi-layer co-extruded method

A plastic optical fiber and step-type technology, which is applied in the field of the preparation of step-type plastic optical fibers, can solve the problems affecting the optical properties of plastic optical fibers, differences in material compatibility, joint defects, etc.

Inactive Publication Date: 2008-06-04
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the different physical properties of the two materials, the viscosity, rheological properties, and even the compatibility of the two different types of materials are different during co-extrusion, resulting in the formation of two layers of plastic optical fiber. Defects are formed at the place, so it is bound to affect the optical properties of the plastic optical fiber

Method used

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  • Method for continuously preparing phase step type plastics optical fibre by multi-layer co-extruded method
  • Method for continuously preparing phase step type plastics optical fibre by multi-layer co-extruded method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] First, the three kinds of high polymer masterbatches were placed in three single-screw extruders, among which polymethyl methacrylate was used as the core layer material, poly(pentafluoropropyl methacrylate) was used as the reflective layer material, and polyvinylidene fluoride was used as the material for the reflective layer. It is a flexible layer material.

[0028] Connect the discharge port of the above-mentioned single-screw extruder to a circular tube connected to a central circular hole and a 4-layer co-extruded circular tube mold with 4 concentric rings, and then combine the core layer material, the light-reflecting layer material and After the polymer masterbatches of the flexible layer material are heated and melted in their respective extruders (both at 230°C), they pass through the respective extruders through the respective exits of the respective layers of the concentric ring-shaped co-extrusion die to form the core layer Material extruder: reflective lay...

Embodiment 2

[0030] First, the four kinds of high polymer masterbatches were placed in four single-screw extruders, among which polymethyl methacrylate was used as the core layer material, poly(pentafluoropropyl methacrylate) was used as the reflective layer material, and polyvinylidene fluoride was used as the material for the reflective layer. It is a flexible layer material, and polyvinyl chloride is an outer protective layer material.

[0031]Connect the discharge port of the above-mentioned single-screw extruder to a circular tube connected to a central circular hole and a 4-layer co-extruded circular tube mold with 4 concentric rings, and then core material, reflective layer material, After the polymer masterbatches of the flexible layer material and the protective layer material are heated and melted in their respective extruders, they are extruded with the core layer material through the respective extruders through the respective exits of the respective layers of the concentric rin...

Embodiment 3

[0033] First, the four kinds of high polymer masterbatches were placed in four single-screw extruders, in which polystyrene was used as the core layer material, polymethyl methacrylate was used as the reflective layer material, and polyvinylidene fluoride was used as the flexible layer material. PVC is the outer protective layer.

[0034] Connect the discharge port of the above-mentioned single-screw extruder to a circular tube connected to a central circular hole and a 4-layer co-extruded circular tube mold with 4 concentric rings, and then core material, reflective layer material, After the polymer masterbatches of the flexible layer material and the protective layer material are heated and melted in their respective extruders, they are extruded with the core layer material through the respective extruders through the respective exits of the respective layers of the concentric ring-shaped co-extrusion die. Extruder: reflective layer material extruder: flexible layer material...

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Abstract

The invention belongs to the field of broadband access network in a high speed light communication network and the field of multimedia material technology in information communications, which more particularly relates to the preparation method of a step typed plastic fiber with a mutagenic refractive index. The continuous multilayer composite extrusion method provided by the invention adds a flexible layer to strengthen the flexibility of the plastic fiber on the basis of ordinary two layers through an annular circular tube die with the same core and with each layer compressing together; the flexible layer is coated at the outmost layer of the fiber, so the transparency performance of the fiber is not affected and at the same time, the flexibility of the plastic fiber is greatly increased. Furthermore, if needed, an external protective layer can also be added at the same time of drawing the fiber to form a four-layer structure so as to lead the productions of the plastic fiber and optical cable to be completed at the same time and on the same machine unit.

Description

technical field [0001] The invention belongs to the field of broadband access network in high-speed optical communication network and the technical field of multimedia materials for information communication, and in particular relates to a preparation method of a step-type plastic optical fiber with a sudden change in refractive index. Background technique [0002] Modern communications are developing towards high speed and large capacity at a rapid pace. The rise of multimedia communication requires that the information it transmits is rich in content and wide in frequency. For this reason, the requirements for the bandwidth of the access network are increasing day by day. Therefore, it is necessary to widen the communication network, especially the family access network, so that it is suitable for the needs of the communication highway. At present, the development of optical fiber communication is extremely rapid, and its tentacles have spread throughout the main lines o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/06B29C47/56B29C47/20B29C47/26B29C47/34G02B6/00B29K33/04B29K25/00B29K69/00B29K27/12B29K27/18B29K96/00B29C48/05B29C48/32B29C48/335B29C48/355
CPCB29C47/26B29C47/0014B29C47/065B29C48/05B29C48/21B29C48/335
Inventor 刘新厚甄珍
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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