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A kind of product molding method of pp/pc micro-foaming material

A molding method and micro-foaming technology, applied in the direction of coating, etc., can solve the problems such as high requirements for process condition control, achieve the effect of obvious micropore distribution, uniform micropore distribution, and reduce the internal stress of the product

Active Publication Date: 2020-05-22
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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  • A kind of product molding method of pp/pc micro-foaming material
  • A kind of product molding method of pp/pc micro-foaming material
  • A kind of product molding method of pp/pc micro-foaming material

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. These raw materials are mixed uniformly in a mixer to form a PP / PC compound, and then melted, extruded and pelletized 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 ...

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Abstract

The invention discloses a product molding method of PP / PC micro-foaming material, comprising the following steps: (1) mixing a foaming agent, a foaming aid, a nucleating agent, etc., and a carrier resin through a twin-screw extrusion mechanism Obtain foam masterbatch; (2) mix PP, PC, nanoparticles and compatibilizer etc. uniformly to form PP / PC compound; (3) extrude the PP / PC compound in step (2) through twin-screw After machine melting, extruding and pelletizing, a uniform compound is obtained; (4) the foam masterbatch in step (1) is activated and then mixed with the compound prepared in step (3) to form a mixed material; (5) ) Add the mixed materials into the injection molding machine to produce PP / PC microporous products. On the one hand, the present invention can effectively improve the micro-foaming performance of PP / PC, and the uniform density of cells is high and the size is small; Influence, low cost, convenient processing and production.

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 Patents(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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