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Method for detecting dispersibility of titanium white in plastics

A detection method, the technology of titanium dioxide, applied in the chemical industry, can solve the problems of many equipments, difficult detection, long detection process, etc., and achieve the effect of strong operability, high detection accuracy and short detection process

Active Publication Date: 2014-06-25
PANZHIHUA DONGFANG TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this method is that if the compatibility between titanium dioxide and resin is poor, titanium dioxide will not be effectively dispersed in the resin, and the powder will agglomerate after melting. Most of the resin does not contain titanium dioxide, and the torque measured at this time Very small, causing detection errors
The second is to process titanium dioxide and resin into color masterbatch, and observe the crystal points on the plastic film with a microscope after blowing the film through a film blowing machine. If there are few crystal points or no crystal points, the dispersion will be good, and if there are many crystal points and irregularities, the dispersion will be poor. , this method can effectively characterize the dispersion of titanium dioxide in plastics, but its detection is difficult, the detection process is long, and many equipments are used, so many application manufacturers do not use this method

Method used

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  • Method for detecting dispersibility of titanium white in plastics
  • Method for detecting dispersibility of titanium white in plastics
  • Method for detecting dispersibility of titanium white in plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Take commercially available 50g general-purpose titanium dioxide and 50g PE resin, after fully mixing, place in twin-screw extruder feeding device and carry out twin-screw extruding, take and start to extrude respectively in the extruding process 1 g each of the material, the material whose extrusion time is between 3 and 10 minutes, the material whose extrusion time is between 10 and 15 minutes, and the material after 15 minutes of extrusion, is placed in a muffle furnace and burned for 30 minutes at 300 ° C. The solid content of each extrusion period was measured respectively, and the measured data are shown in Table 2.

Embodiment 2

[0027] Embodiment two: take by weighing commercially available 50g general-purpose titanium dioxide and 300g PE resin, after fully mixing, place in twin-screw extruder feeding device and carry out twin-screw extrusion, take and start to extrude respectively in extrusion process 1 g each of the material, the material with an extrusion time of 3 to 10 minutes, the material with an extrusion time of 10 to 15 minutes, and the material after 15 minutes of extrusion, was placed in a muffle furnace and burned at 400 ° C for 60 minutes. The solid content of each extrusion period was measured respectively, and the measured data are shown in Table 2.

Embodiment 3

[0028] Embodiment 3: Take commercially available 50g of domestic color masterbatch special-purpose titanium dioxide and 450g of PE resin, after fully mixing, place in twin-screw extruder feeding device and carry out twin-screw extruding, take starting point respectively in extruding process 1g each of the extruded material, the material whose extrusion time is between 3 and 10 minutes, the material whose extrusion time is between 10 and 15 minutes, and the material after 15 minutes of extrusion, is placed in a muffle furnace and burned for 60 minutes at 500 ° C. . The solid content of each extrusion period was measured respectively, and the measured data are shown in Table 2.

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Abstract

The invention discloses a method for detecting the dispersibility of titanium white in plastics, and belongs to the field of chemical industry. In order to solve the technical problem, the invention provides a simple and reliable method for detecting the dispersibility of titanium white in plastics. The method comprises the following steps of: a) fully mixing the titanium white and a resin to obtain a material to be detected; and b) extruding the material to be detected in an extruder, burning the material in different extrusion sections at resin decomposing temperature, calculating the solid content of the material in different extrusion sections, and characterizing the dispersibility of the titanium white in the plastics by using a ratio of the solid content, wherein the solid content is a quotient obtained by the mass of the material before burning by the mass of the material after burning. The dispersibility of the titanium white in the plastics is characterized by the ratio of the solid content, and the method has the advantages of high operability, simplicity, practicability, short detection flow, and high detection accuracy and suitable to be promoted and applied in the field.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for detecting the dispersibility of titanium dioxide in plastics. Background technique [0002] Titanium dioxide is widely used in the fields of coatings and plastics because of its high hiding power, high decolorizing power and whiteness. Among them, plastic is the second largest user of titanium dioxide. The world's plastic titanium dioxide accounts for more than 20% of the total titanium dioxide. The proportion of titanium dioxide used in plastics in my country is also increasing year by year. Because titanium dioxide is used in white masterbatch The proportion generally accounts for 60% to 70%. Therefore, the dispersibility of titanium dioxide determines the processing performance of the masterbatch. The dispersibility of titanium dioxide in plastics is a property of titanium dioxide materials, which has nothing to do with the uniformity of mixing of mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 景建林黄北卫陈新红刘小波李礼
Owner PANZHIHUA DONGFANG TITANIUM IND
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