Resin composition for jetting moulding

Abstract

The present invention relates to a resin composition for ejection moulding. Said resin composition includes 5%-30 wt% of polycarbonate resin, 3%-25 wt% of polyacrylontirile-butadiene-styrene resin, i.e. ABS, 0%-10 wt% of polystyrene-butadiene-styrene resin or polystyrene-ethylene-butylene-styrene resin and 50%-90 wt% of polyethylene terephthalate (PET). Said invention can upgrade the broken material of used or recovered PET resin into the mouldable PET resin composition for ejection moulding.

Description

technical field [0001] The present invention relates to a resin composition for injection molding, especially a polyethylene terephthalate resin (PET) moldable for injection molding, which is produced from recycled plastic bottle recycling crumbs combination. Background technique [0002] Linear polyesters such as polyethylene terephthalate resin (PET) have many well-known excellent physical properties, such as thermal stability, in the crystalline state. However, molding such resins is difficult using conventional molding methods. The unmodified PET resin crystallizes slowly during the injection molding process, causing the PET to harden during the molding cycle, so that only parts with low impact resistance can be manufactured. But because of the crystallization of the initial (initiate) PET resin, it is inevitable to go through a high temperature process (higher than the traditional molding temperature). This process is not only inconvenient, but also expensive and dif...

AI Technical Summary

Problems solved by technology

But because of the crystallization of the initial (initiate) PET resin, it is inevitable to go through a high temperature process (higher than the traditional molding temperature)

This process is not only inconvenient, but also expensive and difficult to use, and the high temperature process is more likely to degrade polyester such as PET resin

Especially due to the lengthy molding cycle, the polymer often degrades PET severely in the high temperature cavity of the injection molding machine.

In addition, unmodified or unmodified PET is extremely fragile, and usually blocks the nozzle after one shot, making it difficult to commercially use it for injection molding

[0003] Therefore, although injection molding is a common method in the plastic industry, it is difficult for PET, and it is almost impossible to use injection molding molding method

Therefore, the recovery and utilization rate of PET is not high.