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A kind of production technology of fep colored particle

A production process and colored particle technology, which is applied in the field of FEP colored particle production process, can solve problems such as die casting, toner decomposition, and difficult control of parameters, so as to improve the concentration of sub-mass, reduce die casting, The effect of short residence time

Active Publication Date: 2016-05-25
ZHEJIANG GREEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the equipment process of this manufacturing method is relatively simple, the raw materials are easily polluted by human beings in the mixing process, and at the same time, the inherent capacity of the equipment is reduced, causing a large waste of public resources.
The processing temperature of FEP is 420-450°C, which requires very high heat resistance of the toner. If the toner stays in the extruder for a long time, it will easily cause the decomposition of the toner or the discoloration of the toner. High temperature, followed by the resistance of the filter, makes it difficult to control the parameters, which directly affects the stability of the color system
In addition, due to the limited number of small molecules discharged by the vacuum exhaust of FEP during the production process, the particles are easy to form pores, which leads to the formation of die casting phenomenon during use and affects the appearance of the product.

Method used

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  • A kind of production technology of fep colored particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Set the temperature of the twin-screw extruder to 420°C, the temperature of the single-screw extruder to 420°C, and the speed of the main engine to 200r / min. Then the FEP pellets with a particle size of 100 meshes were screened as the main feed, and were put into the feeding hopper of the twin-screw extruder. The temperature of the feeder was set at 120°C, and the feeder was fed into the twin-screw extruder. The twin-screw extruder absorbs the toner through side feeding, and the FEP pellets are mixed with the toner and then extruded through the twin-screw extruder. The outlet of the twin-screw extruder is provided with a filter block. The single-screw extruder no longer mixes materials, and directly feeds into the single-screw extruder through the open free gravity of the twin-screw extruder, directly builds up a pressure of 8MPa, and then passes through the filter screen to the die for drawing. Finally, FEP colored particles are obtained through water cooling, air dryi...

Embodiment 2

[0022] Set the temperature of the twin-screw extruder to 430° C., the temperature of the single-screw extruder to 430° C., and the speed of the main engine to be 220 r / min. Then the FEP pellets with a particle size of 200 meshes were screened as the main feed, and were put into the feeding hopper of the twin-screw extruder. The temperature of the feeder was set at 130°C, and the feeder was fed into the twin-screw extruder. The twin-screw extruder absorbs the toner through side feeding, and the FEP pellets are mixed with the toner and then extruded through the twin-screw extruder. The outlet of the twin-screw extruder is provided with a filter block. The single-screw extruder no longer mixes materials, and directly feeds into the single-screw extruder through the open free gravity of the twin-screw extruder, directly builds up a pressure of 10MPa, and then passes through the filter screen to the die for drawing. Finally, FEP colored particles are obtained through water cooling,...

Embodiment 3

[0024] Set the temperature of the twin-screw extruder to 440°C, the temperature of the single-screw extruder to 440°C, and the speed of the main engine to 230r / min. Then the FEP pellets with a particle size of 300 meshes were screened as the main feed, and were put into the feeding hopper of the twin-screw extruder. The temperature of the feeder was set at 140°C, and the feeder was fed into the twin-screw extruder. The twin-screw extruder absorbs the toner through side feeding, and the FEP pellets are mixed with the toner and then extruded through the twin-screw extruder. The outlet of the twin-screw extruder is provided with a filter block. The single-screw extruder no longer mixes materials, and directly feeds into the single-screw extruder through the open free gravity of the twin-screw extruder, directly builds up a pressure of 12MPa, and then passes through the filter screen to the die for drawing. Finally, FEP colored particles are obtained through water cooling, air dry...

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Abstract

The invention relates to a production process of FEP colored particles. The production process mainly feeds FEP pellets into a feeder, and is fed into a twin-screw extruder by the feeder. The twin-screw extruder Through the lateral intake of toner, FEP pellets and toner are mixed and extruded from the outlet of the twin-screw extruder and directly introduced into the single-screw extruder. It is then prepared by water cooling, air drying and pelletizing. The production process of the FEP colored particle of the present invention has high color stability, the residence time of the toner in the screw is short, the toner will not decompose or turn yellow, the product has good appearance, and the production capacity is increased by 4-5 times.

Description

technical field [0001] The invention relates to a production process of colored particles, in particular to a production process of FEP colored particles. Background technique [0002] FEP (tetrafluoroethylene / hexafluoropropylene copolymer) is a widely used fluoroplastic, which has excellent heat resistance, chemical resistance, extrusion formability, etc., and it also has excellent electrical insulation and Low dielectric loss tangent at high frequencies, low flammability and smoke. Therefore, FEP can be used to make the lining of pipes and chemical equipment, the surface layer of drums, and the insulation material of cables and wires. [0003] At present, the production process of FEP pre-coloring and masterbatch is mainly that FEP powder and toner are pre-mixed by a high-speed mixer, and then extruded by a twin-screw extruder. Although the equipment process of this manufacturing method is relatively simple, the raw materials are easily polluted by human beings in the mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B9/06B29C47/68B29C47/92B29C47/10B29C48/385B29C48/40B29C48/92
CPCB29C48/397B29C48/92B29C2948/92704B29C48/385B29C2948/92609B29C2948/92933B29C48/40
Inventor 徐洪颜华红景亚宾
Owner ZHEJIANG GREEN NEW MATERIALS
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