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A kind of preparation method of screw cleaning material of injection molding machine

A technology for screw and cleaning material of injection molding machine, which is applied in the field of polymer material research and development or maintenance of production and processing equipment, can solve the problems of low market sales volume of screw cleaning material, it is difficult to remove decomposed carbon, and the cleaning effect is not obvious. Wide applicability, low cost, low adhesion effect

Active Publication Date: 2020-04-03
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of material degradation and carbonization, it is difficult to clean up the decomposed carbon deposited in the screw groove by using PP or LDPE, and PP and LDPE themselves will also stay in the screw groove, resulting in a large amount of PP and LDPE but The cleaning effect is not obvious
At present, the price of screw cleaning materials sold on the market is generally high, often several times the price of PP and LDPE, which is why the demand for screw cleaning materials is great but the market sales are not large.

Method used

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  • A kind of preparation method of screw cleaning material of injection molding machine
  • A kind of preparation method of screw cleaning material of injection molding machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The present invention comprises the following steps:

[0057] Step 1, preparing microcapsule modification aids, among the reagents or raw materials used in this step: the purity of triethanolamine, n-octanol, and melamine are analytically pure, and urea, sodium dodecylbenzenesulfonate, ortho-benzene The purity of dibutyl diformate, ethylene glycol monophenyl ether, and concentrated sulfuric acid are all chemically pure.

[0058] 101. According to the quality of each component, add 100 parts of formaldehyde solution and 40 parts of urea into a three-necked flask with a reflux device. The formaldehyde solution is an aqueous solution with a mass percentage of formaldehyde of 37%, and the purity is analytically pure; stir and mix evenly Finally, use triethanolamine to adjust the pH of the system to 8.0-9.0, and react at 70°C for 30 minutes; then adjust the system temperature to 65°C, add 18 parts of melamine, continue the reaction for 20 minutes, and cool to room temperatur...

Embodiment 2

[0063] The present invention comprises the following steps:

[0064] Step 1, preparing microcapsule modification aids, among the reagents or raw materials used in this step: the purity of triethanolamine, n-octanol, and melamine are analytically pure, and urea, sodium dodecylbenzenesulfonate, ortho-benzene The purity of dibutyl diformate, ethylene glycol monophenyl ether, and concentrated sulfuric acid are all chemically pure.

[0065] 101. According to the quality of each component, add 100 parts of formaldehyde solution and 50 parts of urea into a three-necked flask. The formaldehyde solution is an aqueous solution with a mass percentage of formaldehyde of 37%, and the purity is analytically pure; after mixing evenly, use three Adjust the pH of the system with ethanolamine to 8.0-9.0, and react at 80°C for 30 minutes; then adjust the temperature of the system to 60°C, add 15 parts of melamine, continue the reaction for 25 minutes, and cool to room temperature to obtain a mod...

Embodiment 3

[0071] The present invention comprises the following steps:

[0072] Step 1, preparing microcapsule modification aids, among the reagents or raw materials used in this step: the purity of triethanolamine, n-octanol, and melamine are analytically pure, and urea, sodium dodecylbenzenesulfonate, ortho-benzene The purity of dibutyl diformate, ethylene glycol monophenyl ether, and concentrated sulfuric acid are all chemically pure.

[0073] 101. According to the quality of each component, add 100 parts of formaldehyde solution and 45 parts of urea into the three-necked flask. The formaldehyde solution is an aqueous solution with a mass percentage of formaldehyde of 37%, and the purity is analytically pure; after mixing evenly, use three Adjust the pH of the system with ethanolamine to 8.0-9.0, and react at 75°C for 30 minutes; then adjust the temperature of the system to 70°C, add 20 parts of melamine, continue the reaction for 25 minutes, and cool to room temperature to obtain a m...

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Abstract

The invention discloses a preparation method of an injection molding machine screw cleaning material. The screw cleaning material is obtained by performing melt blending on a microcapsule additives and PP matrix resin according to a certain ratio and performing extrusion granulation. The microcapsule additive takes urea-formaldehyde resin as a wall material, takes a butyl phthalate, ethylene glycol monophenyl ether and n-octanol mixture as a core emulsion, and are microcapsules which are prepared under certain conditions and have a particle size of 2-3 [mu]m. The screw cleaning material has low melting energy consumption, low melt viscosity, minimal adhesive force to a barrel and a screw, good compatibility with other polymer materials, and can dissolve decomposed carbon deposited in a screw groove. Compared with commercially available professional screw cleaning materials, the screw cleaning material developed by the present invention has lower cost. Therefore, the screw cleaning material can meet the market requirements for screw cleaning material performance and price, and has market promotion and application prospects.

Description

[0001] technology neighborhood [0002] The invention belongs to the field of research and development of polymer materials or maintenance of production and processing equipment, and in particular relates to a preparation method of a screw cleaning material for an injection molding machine. Background technique [0003] In the process of polymer material research and development or production and processing, it is often necessary to empty the remaining material or impurities in the screw groove of the injection molding machine due to material replacement, shutdown maintenance or material degradation, and the screw cleaning material plays such a role. In actual production and application, in the absence of special screw cleaning materials, plastics with excellent thermal stability, good fluidity and good adhesion to other resin materials are often used for plastic injection molding machine cleaning, such as PP, LDPE is an alternative material for commonly used screw cleaning ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08L61/30C08K5/00C08K5/12C08K5/05C08K5/06C08K5/521B29C48/92
CPCB29C48/92B29C2948/92704C08L23/06C08L23/12C08L61/30C08K5/00C08K5/12C08K5/05C08K5/06C08K5/521
Inventor 董金虎
Owner SHAANXI SCI TECH UNIV
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