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Continuous reaction and coextrusion process of preparing stepped plastic fiber

A plastic optical fiber and step-type technology, applied in the field of optical information transmission materials, can solve the problems of low production efficiency and inability to produce plastic optical fibers, and achieve the effects of improving production efficiency, improving production environment, and improving transparency

Inactive Publication Date: 2004-04-07
四川汇源光通信股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above method has low production efficiency and cannot produce low-loss plastic optical fibers for special purposes.

Method used

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  • Continuous reaction and coextrusion process of preparing stepped plastic fiber
  • Continuous reaction and coextrusion process of preparing stepped plastic fiber
  • Continuous reaction and coextrusion process of preparing stepped plastic fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Purify methyl methacrylate (MMA) by distillation under reduced pressure, then add the purified modifier, initiator, and chain transfer agent, and pre-polymerize at 40-80°C for 1-24 hours under the protection of 99.99% high-purity nitrogen , so that the viscosity is appropriate, and then pumped into the twin-screw continuous reaction extruder extruding the core material through a metering pump. The temperature of the twin-screw continuous reaction extruder is set at 120-200°C, and the reaction extrusion is carried out under the protection of high-purity nitrogen. Finally, the unreacted monomer is removed by vacuum, so that the remaining monomer content is less than 1%, and the high-purity PMMA is extruded and polymerized. Object core material.

[0024] Purify methyl methacrylate (MMA) and methacrylic acid-2,3,3,3-tetrafluoropropyl under reduced pressure, MMA, methacrylic acid-2,3,3,3-tetrafluoropropyl in the solution The molar concentration of propyl ester is 21.5% and ...

Embodiment 2

[0027] Methyl methacrylate (MMA) and methacrylic acid-2,2,2-trifluoroethyl are purified by distillation under reduced pressure, the moles of MMA, methacrylic acid-2,2,2, trifluoroethyl in the solution Concentrations are 61.4% and 38.6% respectively, then add purified initiator and chain transfer agent, under the protection of 99.99% high-purity nitrogen, pre-polymerize at 40-80°C for 1-24 hours to make the viscosity appropriate, and then pass the metering pump Pumped into a twin-screw continuous reaction extruder extruding leather. The temperature of the twin-screw continuous reaction extruder is set at 120-200°C, and the reaction extrusion is carried out under the protection of high-purity nitrogen. Finally, the unreacted monomer is removed by vacuum, so that the remaining monomer content is less than 1%, and the extrusion refractive index is 1.460 High-purity fluorinated acrylate polymer leather.

[0028] Using two twin-screw continuous reaction extruders, such as figure 1...

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Abstract

The continuous reaction and coextrusion process of preparing stepped plastic fiber includes purifying monomer, compounding polymer solution, heating or microwave prepolymerization, extrusion with one continuous reaction extruder, exhausting and recovering unreaced monomer and oligomer, forming transparent polymer melt or cooling and cutting into grains; extruding transparent polymer core and transparent coating with two continuous reaction extruders; and fusing and combining in a coextruding mold, drawing, tensing and cooling to form the stepped plastic fiber.

Description

Technical field: [0001] The invention belongs to the field of optical information transmission materials, and relates to a production method for preparing step-type plastic optical fibers through a continuous reaction co-extrusion method. Background technique: [0002] Step-type plastic optical fiber is a new type of light-transmitting medium with a high-refractive-index high-transparency polymer as the core material and a low-refractive-index, highly transparent fluororesin as the cladding. Because of its low loss, good flexibility and long service life, it is regarded as an ideal material to replace the current decoration and lighting methods. It has obvious advantages such as environmental protection, energy saving, safety, and good artistic effect; Information transmission medium, used in local area network, access network, sensor, consumer electronics industry and other fields. [0003] The preparation methods of step-type plastic optical fiber mainly include: [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/04B29C47/56G02B6/02
Inventor 储九荣张海龙吴祥君刘志飞王冬刘中一
Owner 四川汇源光通信股份有限公司
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