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Extrusion neck ring mold and method for preparing materials with high orientation degree distribution of filling materials

A high-orientation, degree-distribution technology, applied in the field of polymer composite material manufacturing, can solve problems such as complex structural design, single slit flow channel, extrusion pressure leakage or overflow, etc., to achieve a wide range of applications and easy disassembly and assembly , low cost effect

Inactive Publication Date: 2010-07-14
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it has always been challenging to uniformly disperse or distribute fillers into the polymer matrix. At present, many scholars and experts at home and abroad mainly use the method of designing the shear field to improve the orientation degree of fillers in the polymer matrix (such as WO2009 / 137562A2; US2008 / 0174047A1; CN101232987A; introduced in CN1872523A), but it is specially used to prepare polymer composite materials with high orientation distribution of fillers and the report of extrusion die is seldom
In addition, the existing extrusion dies that can improve the degree of filler orientation are basically designed with a single slit flow channel, the structure design is complex, the design accuracy is high, and the extrusion pressure is too large during use. Easy to cause leakage or overflow

Method used

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  • Extrusion neck ring mold and method for preparing materials with high orientation degree distribution of filling materials
  • Extrusion neck ring mold and method for preparing materials with high orientation degree distribution of filling materials
  • Extrusion neck ring mold and method for preparing materials with high orientation degree distribution of filling materials

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Embodiment 1

[0027] figure 1 It is a structural schematic diagram of the extrusion die of the present invention; figure 2 is the schematic diagram of the structure of the orienter; image 3 for figure 2 A-A cross-sectional view of the figure, as shown in the figure: the extrusion die of the present embodiment for preparing materials with a high degree of orientation distribution of fillers includes five interconnected orientators 1, and the orienter 1 includes a module 2 and a housing 3, and the module 2 It is arranged in the housing 3 and forms two orientation channels 4 with two ends converging and separating in the middle with the inner wall of the housing 3. During use, the filler is sheared and stretched in the orientation channel under the action of the extruder and moves along the The flow direction is deformed and oriented, and a good orientation effect is achieved under the action of ten orientation channels of five orientators. The number of orientators can also be adjusted a...

Embodiment 2

[0032] Preparation of EPDM rubber raw tape with high degree of orientation distribution of glass fibers comprises the following steps:

[0033] a) Drying: Dry the glass fiber at about 110°C for 24 hours, and dry the unvulcanized EPDM rubber at about 55°C for 24 hours, and control its moisture content to 0.02% by weight;

[0034] b) Mixing: put the dried and cooled glass fiber and EPDM rubber into a mixer at a weight ratio of 5:95, and mix for 30 minutes at a temperature of about 35°C to obtain a mixture;

[0035] c) Granulation: Put the mixture into the extruder, melt and granulate the masterbatch under the conditions of extrusion temperature of about 130°C, die temperature of about 160°C, and screw speed of 20 rpm;

[0036] d) drying: dry the masterbatch at a temperature of about 55°C for 24 hours, and control the moisture content to 0.02% by weight;

[0037] e) Extrusion: Extrude the dried and cooled masterbatch with an extruder to extrude the hot EPDM strip through the abo...

Embodiment 3

[0041] Preparation of a composite material with high orientation distribution talc in a polypropylene matrix, comprising the following steps:

[0042] a) Drying: Dry the talc at about 90°C for 36 hours, dry the polypropylene at about 90°C for 36 hours, and control the moisture content to 0.015% by weight;

[0043] b) Mixing: put the dried and cooled talc and polypropylene into a mixer at a weight ratio of 10:90, and mix for 1 hour at a temperature of about 60°C to obtain a mixture;

[0044] c) Granulation: Put the mixture into the extruder, melt and granulate under the conditions that the extrusion temperature is about 200°C, the die temperature is about 210°C, and the screw speed is 35 rpm to obtain the masterbatch;

[0045] d) drying: dry the masterbatch at about 90°C for 36 hours, and control the moisture content to 0.015% by weight;

[0046] e) Extrusion: Use an extruder to extrude hot strips of the masterbatch after drying and cooling through the above-mentioned extrusio...

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Abstract

The invention discloses an extrusion neck ring mold for preparing materials with high orientation degree distribution of filling materials, which comprises at least two orientation devices, wherein the orientation devices are mutually connected, the orientation devices comprise modules and cases, the modules are arranged in the cases, and two orientation flow passages with two merged ends and the separated middle part are formed between the modules and the inner walls of the cases. The extrusion neck ring mold has the advantages of simple structure, easy manufacture, low cost, convenient dismounting and installation and the like. In addition, the extrusion neck ring mold consists of a plurality of modules of the orientation devices, the orientation degree of the filling materials can be regulated and controlled through increasing or decreasing the number of the orientation devices, and at the same time, the orientation degree of the filling materials can also be regulated and controlled through regulating the radian of the orientation flow passages. The invention also discloses a method for preparing the materials with high orientation degree distribution of the filling materials on the basis of the extrusion neck ring mold. High molecular composite films, plate materials, sheet materials, abnormal materials and the like with high orientation degree distribution of the filling materials can be prepared through the steps of drying, mixing, pelleting, drying, extruding and forming, and the application range is wide.

Description

technical field [0001] The invention relates to the field of polymer composite material manufacturing, in particular to an extrusion die and a method for preparing materials with high degree of orientation distribution of fillers. Background technique [0002] Since the establishment of the concept of polymers in the middle of the 20th century, the research on the molding, processing and application of polymer materials has never left filler particles. With the increase in the output and application of polymer materials year by year, the research on polymer materials filled with filler particles is also a hot topic in the world today. Adding filler particles to polymer materials can reduce the cost of the overall composite material on the one hand, and improve various properties of the composite material on the other hand, such as mechanical properties, electrical conductivity, barrier properties, heat resistance, optical properties, etc. [0003] The study found that the i...

Claims

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Application Information

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IPC IPC(8): B29C47/12B29C47/00B29C48/30
Inventor 王明
Owner SOUTHWEST UNIVERSITY
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