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Rapid evaporated cooling liquid for extrudate

A rapid evaporation and cooling liquid technology, applied in the field of cooling liquid, can solve the problems of impracticality and high price, and achieve the effect of fast volatilization speed, low cost and alleviating adverse effects

Inactive Publication Date: 2009-01-21
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of fast volatile liquid substances is generally much higher than that of tap water, so it is unrealistic to simply use fast volatile cooling liquid media in specific applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In the process of producing modified polymer materials with an extruder (either a single-screw extruder or a twin-screw extruder), the extrudate is cooled with an aqueous solution of a fast volatile substance, and the mass of each component The percentage content is: water is 70%, volatile liquid is 20% ethanol and 10% methyl acetate, the relative volatilization speed of this composition can be increased to 5-15 times of tap water, and it is used for cooling of modified materials , can significantly reduce the water content of the material, for example, for nylon 6, compared with cooling with tap water, the water content can be reduced by 2-5 times.

Embodiment 2

[0019] When using an extruder to produce polymer pipes, rods, profiles, etc., the mass percentage of each component of the rapidly evaporating cooling liquid is: water is 90%, and the volatile liquid is 10% methyl acetate. The composition The relative volatilization speed of the cooling medium can be increased to 5-15 times that of tap water, and the fast volatile mixed solution prepared above is used instead of tap water, thereby increasing the volatilization speed of the cooling medium and reducing the residual moisture on the surface of the product.

Embodiment 3

[0021] Water-insoluble reagents can be used in the fast volatile cooling liquid. The mass percentage of each component of the fast evaporating cooling liquid is: water is 80%, volatile liquid is 10% ethanol, 9.99% n-hexane, surface The active agent is 0.01% sodium stearate, which can increase the volatilization speed of water by about 2 times.

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PUM

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Abstract

The invention relates to a quickly evaporated liquid coolant for an extrudate, which relates to a composition, is applied in the high molecular material processing field and is particularly suitable for cooling situations of extrusion processing or forming. The quickly evaporated liquid coolant adopts a water solution of a quick volatile substance instead of common running water as a cooling medium of the extrudate. The compositions in mass percentage of the quickly evaporated liquid coolant are 10 to 99 percent of water, 1 to 90 percent of the volatile liquid and 0 to 5 percent of surface active agent. The quickly evaporated liquid coolant adopts the water solution of the quick volatile liquid substance; and compared with the running water, the volatile speed of the water mixture is quick, thereby avoiding or lightening the adverse effect of the water content on the surface of the extrudate. Moreover, compared with the quick volatile liquid substance, the cost of the water mixture is low, thereby solving the cost problem.

Description

technical field [0001] The rapidly evaporating cooling fluid for extrudates of the invention relates to a composition, which is used in the field of polymer material processing, and is especially suitable for cooling in extrusion processing or molding. Background technique [0002] In the process of extrusion granulation or extrusion molding of plastic or other polymer materials, it is often necessary to cool the extrudate, and the common cooling liquid medium for extrudates such as plastic strips and pull bars is water, and mainly Tap water at room temperature. During cooling, the extrudate is immersed in medium water. When the temperature of the extrudate is high, such as greater than 100°C, and it is in direct contact with normal temperature or cooling water, the conventional method is to add tap water to the cooling water tank and immerse the extrudate in the water of the tank. The two exchange heat at the interface, thereby reducing the temperature of the extrudate, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04B29C47/88
Inventor 袁绍彦梁荣朗吉继亮李旭华李翰卿
Owner SHANGHAI KINGFA SCI & TECH