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Method for preparing master batch with high-powder content

A content and masterbatch technology, which is applied in the field of preparing high powder content masterbatches, can solve the problems of serious material return, easy breakage of extruded material strips, and difficulty in pulling strips, so as to meet the requirements of mass production and reduce the phenomenon of material return , The effect of processing optimization

Active Publication Date: 2009-02-18
GUANGDONG KINGFA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When producing products with high powder content, there will be the following problems: more powder in the mixture is easy to entrain air, it is difficult to feed directly to the extruder, and the return phenomenon is more serious; the extruded material strip is brittle and easy to break after cooling , it is difficult to draw strips, and cannot meet the requirements of mass production

Method used

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  • Method for preparing master batch with high-powder content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1, the percentage by weight of each component required for the preparation of the masterbatch

[0020] Polypropylene content 38%,

[0021] Talc content 60%,

[0022] erucamide content 1%,

[0023] Calcium stearate content 1%,

[0024] White mineral oil content 0%,

[0025] The coupling agent content is 0%.

[0026] Step 2, keep the internal mixer at a constant temperature of 180°C, add the 40% talcum powder and other components, banbury for 10 minutes, and the rotating speed of the internal mixer is 60 rpm, then add the remaining 20% ​​talcum powder, Practice for 10 minutes.

[0027] Step 3. Turn over the compactor and turn over the hopper, pour the mixed paste into the transfer bin, use mechanical transmission to transfer the paste and pour it into the feeder through the feeding hopper, and force it through the twin-screw in the feeder The paste is pressed into the extruder, the temperature of each zone of the single-screw extruder is set at 180-200°C, and t...

Embodiment 2

[0030] Using exactly the same method and steps as in Example 1, a masterbatch with high powder content was prepared, and the masterbatch can be used for the preparation of modified polyolefin. The working parameters of each step are:

[0031] Step 1, the percentage by weight of each component required for the preparation of the masterbatch

[0032] Polyvinyl acetate content 4%,

[0033] Polyethylene content 4%,

[0034] Calcium carbonate content 90%,

[0035] Ethylene bisstearamide 1%,

[0036] White mineral oil content 1%,

[0037] The coupling agent content is 0%.

[0038] Step 2. Keep the internal mixer at a constant temperature of 100°C, add the 60% talcum powder and other components, and banbury for 10 minutes. The speed of the internal mixer is 60 rpm, then add the remaining talcum powder, and banbury for 5 minutes. minute.

[0039] Step 3. The temperature of each zone of the single-screw extruder is set to 110-130° C., and the screw speed is 80-120 rpm.

Embodiment 3

[0041] Using exactly the same method and steps as in Example 1, a masterbatch with high powder content was prepared, and the masterbatch can be used for the preparation of modified polyolefin. The working parameters of each step are:

[0042] Step 1, the percentage by weight of each component required for the preparation of the masterbatch

[0043] Polyvinyl acetate content 3%,

[0044] Polyethylene content 13%,

[0045] 80% wood flour content,

[0046] Ethylene bis stearamide content 2%,

[0047] White mineral oil content 1%,

[0048] Silane content 1%.

[0049] Step 2. Keep the internal mixer at a constant temperature of 90°C, add the 50% wood powder and other components, and banbury for 5 minutes. The speed of the internal mixer is 60 rpm, then add the remaining wood flour, and banbury for 5 minutes. .

[0050] Step 3. The temperature of each zone of the single-screw extruder is set to 120-130° C., and the screw speed is 80-120 rpm.

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Abstract

The invention provides a method for preparing masterbatch with high powder content. The method comprises the following steps: various raw materials are prepared, a Banbury mixer is kept at constant temperature, all the carriers and 50-80 percent of or all powder components, lubricant, dispersing agent and coupling agent are placed in the Banbury mixer for kneading; after the remained functional components are placed in the Banbury mixer for kneading, the Banbury mixer barn is turned over; the materials are decanted into the feeding hopper of a single screw extruder through a transporting receptacle; by the forced feeding of the feeding hopper, the single screw extruder is used to obtain functional masterbatch with high powder content. The method is capable of solving the problem that feeding is difficult during direct production of high powder when blending modified plastics system is filled, and the problem of difficult processing in the modified plastics industry; the masterbatch with high powder content can also meet the requirements of downstream products, and used to produce injection-moulded or extruded products.

Description

technical field [0001] The invention relates to a method for preparing master batches with high powder content. technical background [0002] In the plastic modification industry, in the case of using a twin-screw extruder for granulation, the general mixing mode is generally used, such as mixing with a high-speed mixer and then feeding directly, after extrusion, drawing, cooling, and pelletizing process to get the product. However, in this mixed form, generally only products with low powder content can be produced, that is, the powder content does not exceed 40%. When producing products with high powder content, there will be the following problems: more powder in the mixture is easy to entrain air, it is difficult to feed directly to the extruder, and the return phenomenon is more serious; the extruded material strip is brittle and easy to break after cooling , it is difficult to pull the strips, and cannot meet the requirements of mass production. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/22C08L23/12C08L23/06C08L31/04C08L25/06C08L23/00C08L53/02C08L97/02C08L3/02C08K13/02B29B7/00B29B9/06
Inventor 周英辉何威王培武李志平丁超罗忠富
Owner GUANGDONG KINGFA TECH CO LTD
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