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On-line modified producing method for engineering plastics

A technology for engineering plastics and production methods, applied in chemical instruments and methods, filter screens, grids, etc., can solve the problems of product physical and chemical performance index damage, insurmountable batch differences, high energy consumption and production costs, and achieve product quality. Uniform and reliable, stable and reliable production operation, excellent and stable product performance

Inactive Publication Date: 2007-08-15
SHEN MA INDUSTRY CO LTD +1
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  • Abstract
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Problems solved by technology

Because the traditional engineering plastic modification processing technology is fed in batches, the batch difference cannot be overcome, which directly leads to uneven product quality and low physical properties; and because the raw materials of the traditional engineering plastic modification processing technology are granular, the modified production must be After the remelting process from solid state to molten state, the energy consumption and production cost are relatively high. At the same time, the remelting process is a high-temperature degradation process, and the physical and chemical performance indicators of the product will be damaged and the quality will be deteriorated.

Method used

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  • On-line modified producing method for engineering plastics

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Embodiment Construction

[0025] On-line modification production method of engineering plastics, the molten polymer with a certain molecular weight obtained through continuous polymerization is directly sent to the twin-screw extruder online, and an appropriate amount of additives are added according to product requirements, and it is uniformly mixed through the twin-screw extruder extrude. The extruded strips are water-cooled and air-cooled, and then enter the strand granulator for pelletizing, and then sieve through the vibrating screen to remove unqualified slices. After being cooled and dried by the fluidized bed, the slices are collected into the packaging silo, and enter the automatic packaging line for packaging.

[0026] Take the online modification of nylon 66 as an example: the engineering plastic is nylon 66, the auxiliary agent is glass fiber, the amount of glass fiber added is 30%wt of the total material, and the technical parameters of the molten polymer entering the twin-screw extruder a...

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Abstract

The invention discloses a preparing method to produce engineering plastics on line modify, which comprises the following steps: getting finite molecular weight molten state polymer through continuous polymerization; delivering to twin-screw extruder on line directly; adding right amount auxiliary agent based on the demand of product; mixing evenly through twin-screw extruder; squeezing; getting the product. This invention possesses merits of low power, low preparing cost and stable quality, which can be used to produce engineering plastics product.

Description

technical field [0001] The invention belongs to the technical field of organic material processing, in particular to an on-line modification production method of engineering plastics. Background technique [0002] Engineering plastics generally refer to plastic materials that can withstand mechanical stress as structural materials and can be used in a wide temperature range and in harsh chemical and physical environments. Engineering plastics can be divided into general engineering plastics and special engineering plastics. General-purpose engineering plastics usually refer to five kinds of plastics that have been produced on a large scale and have a wide range of applications, namely polyamide (nylon, PA), polycarbonate (polycarbonate, PC), polyoxymethylene (POM), polyester ( Mainly PBT) and polyphenylene oxide (PPO). Special engineering plastics refer to some plastics with more excellent and unique properties, but most of them have not yet been mass-produced or produced ...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K7/14B29C47/40B29C47/92B29B9/02B29B13/06B07B1/28B29C48/92
CPCB29C47/92B29C48/40
Inventor 马源李鹏洲谭光营韩伟李晓辉曹春安肖新斌谢守民杨前华常佩璋
Owner SHEN MA INDUSTRY CO LTD
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