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Polypropylene/polycarbonate (PP/PC) micro-foaming material product forming method

A molding method and micro-foaming technology, applied in the direction of coating, etc., can solve problems such as high requirements for process condition control, achieve the effects of ensuring mechanical properties, easy storage and addition, and improving mechanical properties

Active Publication Date: 2018-07-31
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the basic structure of the current injection molding machine is not conducive to the production of products with better microporous structure, and it has higher requirements for process condition control, which also poses a challenge to the microfoaming injection of PP / PC composites

Method used

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  • Polypropylene/polycarbonate (PP/PC) micro-foaming material product forming method
  • Polypropylene/polycarbonate (PP/PC) micro-foaming material product forming method
  • Polypropylene/polycarbonate (PP/PC) micro-foaming material product forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, the foam masterbatch is manufactured. The raw materials were weighed according to the following mass: PP-g-MA: 0.598kg, AC: 0.2kg, ZnO: 0.002kg, high melting point PE wax: 0.1kg, talcum powder: 0.1kg. After the raw materials are dried separately, they are mixed uniformly in a mixer and a foam masterbatch is obtained through a twin-screw extruder, and the melt temperature is 170°C during the extrusion process;

[0038] Next, prepare the PP / PC compound. Weigh the dried raw materials according to the following mass: PP: 1kg, PC: 0.1kg, PE-c-GMA: 0.03kg, nano-montmorillonite: 0.02kg, high melting point PE wax: 0.05kg. Mix these raw materials uniformly in a mixer to form a PP / PC compound, and then melt, extrude and pelletize through an ordinary plastic extruder, and the melt temperature is controlled at 205°C during the extrusion process;

[0039] At the same time, put the prepared foam masterbatch into a vacuum dryer and activate it for 20 minutes in an environment...

Embodiment 2

[0044] First, the foam masterbatch is manufactured. The raw materials were weighed according to the following mass: PP-g-MA: 0.497kg, AC: 0.1kg, ZnO: 0.003kg, high melting point PE wax: 0.1kg, talcum powder: 0.3kg. After the raw materials are dried separately, they are mixed uniformly in a mixer and a foaming masterbatch is obtained through a twin-screw extruder, and the melt temperature is 150°C during the extrusion process;

[0045] Next, prepare the PP / PC compound. Weigh the dried raw materials according to the following mass: PP: 1kg, PC: 0.2kg, PE-c-GMA: 0.04kg, nano-montmorillonite: 0.012kg, high melting point PE wax: 0.10kg. Mix these raw materials uniformly in a mixer to form a PP / PC compound, and then melt, extrude and pelletize through an ordinary plastic extruder, and the melt temperature is controlled at 210°C during the extrusion process;

[0046] At the same time, put the prepared foam masterbatch into a vacuum dryer and activate it for 30 minutes in an environ...

Embodiment 3

[0051] First, the foam masterbatch is manufactured. The raw materials were weighed according to the following mass: PP-g-MA: 0.494kg, AC: 0.3kg, ZnO: 0.006kg, high melting point PE wax: 0.1kg, talcum powder: 0.1kg. After the raw materials are dried separately, they are mixed uniformly in a kneader and a foaming masterbatch is obtained through a twin-screw extruder, and the melt temperature is 160°C during the extrusion process;

[0052] Next, prepare the PP / PC compound. Weigh the dried raw materials according to the following mass: PP: 1kg, PC: 0.25kg, PE-c-GMA: 0.05kg, nano-montmorillonite: 0.07kg, high melting point PE wax: 0.125kg. Mix these raw materials uniformly in a mixer to form a PP / PC compound, and then melt, extrude and pelletize through an ordinary plastic extruder, and the melt temperature is controlled at 210°C during the extrusion process;

[0053] At the same time, put the prepared foam masterbatch into a vacuum dryer and activate it for 25 minutes in an envi...

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Abstract

The invention discloses a polypropylene / polycarbonate (PP / PC) micro-foaming material product forming method which comprises the following steps of (1) mixing a foaming agent, a foaming aid, a nucleating agent and a carrier resin, and preparing through a twin-screw extrusion machine to obtain a foaming master batch; (2) uniformly mixing PP, PC, nanoparticles, a compatibilizer and the like to form aPP / PC mixture; (3) melting, extruding and dicing the PP / PC mixture in the step (2) through the twin-screw extrusion machine so as to obtain a uniform compound; (4) activating the foaming master batchin the step (1), and uniformly mixing with the compound prepared in the step (3) so as to obtain a mixed material; and (5) adding the mixed material into an injection molding machine, and producing aPP / PC micropore product. According to the PP / PC micro-foaming material product forming method provided by the invention, on one hand, a micro-foaming performance of PP / PC can be effectively improved,the cell uniform density is high, and the size is small, and on the other hand, the influence on a mechanical performance of a PP / PC composite material caused by the incompatibility of PP and PC is further avoided, the cost is low, and the convenience in processing and production is realized.

Description

technical field [0001] The invention relates to a product forming method of PP / PC micro-foaming materials, and belongs to the technical field of processing and manufacturing of polymer materials. Background technique [0002] In recent years, plastic injection products have been widely used due to the characteristics of strong production adaptability, high efficiency, and easy automation. Among them, polypropylene (PP) resin has light weight, abundant raw material sources, superior performance-price ratio and excellent heat resistance. , chemical corrosion resistance, easy recycling and other characteristics, it is a general-purpose thermoplastic resin widely used in injection products. With the shortage of energy, especially oil, how to save plastic raw materials has led to the generation and development of foamed products. According to the different types of micropore formation and foaming agent, microfoaming methods can often be divided into chemical foaming, physical fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00B29C45/76B29C45/78B29C45/77B29C44/02B29B9/06B29B7/00B29B13/06B29K23/00B29K69/00
CPCB29B7/002B29B9/06B29B13/065B29C44/02B29C45/00B29C45/76B29C45/77B29C45/78B29C2945/76498B29C2945/76531B29C2945/76561B29K2023/12B29K2069/00
Inventor 周应国苏北董斌斌
Owner JIANGSU UNIV OF SCI & TECH
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