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PA6/PP blends low temperature pressure inducement flowing shaping method

A blend and pressure technology, which is applied in the field of low-temperature pressure-induced flow molding of PA6/PP blends, can solve the problems of inability to carry out multiple recycling, decline in mechanical properties, and large power consumption, etc., and achieve improved impact strength , increase density and hardness, and save energy

Inactive Publication Date: 2008-05-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes need to consume a lot of electric energy for heating and screw shearing, etc., and also need to consume a lot of water for cooling.
Moreover, the physical and mechanical properties of these processes will decrease, and it cannot be recycled many times.

Method used

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  • PA6/PP blends low temperature pressure inducement flowing shaping method
  • PA6/PP blends low temperature pressure inducement flowing shaping method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] PA6 / PP blend (20 / 80) under 6MPa pressure, changing the processing temperature, low temperature pressure induced flow molding for 5 minutes, the change of microstructure and the improvement of impact strength, as shown in Table 1.

[0036] Table 1 Impact strength of PA6 / PP(20 / 80) after pressure-induced flow molding at low temperature

[0037] Processing temperature (℃)

Embodiment 2

[0039] The microstructure change and impact strength of the blended composite material PA6 / PP (20 / 80) were changed under 6 MPa pressure, and the processing temperature was changed, and the low-temperature pressure-induced flow molding was formed for 5 minutes, as shown in Table 2.

[0040] Table 2 Impact strength of PA6 / PP(35 / 65) after pressure-induced flow molding at low temperature

[0041] Processing temperature (℃)

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PUM

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Abstract

The invention relates to a low temperature pressure inducing flow forming method of a PA6 / PP mixed material, comprising the steps of (1) the PA6 / PP mixed material sample bars are injected and formed by a double screw under the injection condition of 170 to 260 DEG C; (2) the prepared PA6 / PP mixed material sample bars are cut into shape; (3) the cut mixed material are arranged in the middle of the chamber of a die, and the low temperature pressure inducing flow appears under the condition of temperature of 20 to 150 DEG C, time of 5 to 150 minutes and pressure of 3 to 10.5 MPa. The method has the advantages of simple forming process, low energy loss, and having wide application prospect in the process of PA6 / PP mixed material.

Description

technical field [0001] The invention belongs to the field of polymer material physics and its processing, and in particular relates to a low-temperature pressure-induced flow forming method of a PA6 (polyamide 6) / PP (polypropylene) blend. Background technique [0002] PA6 is a high-grade thermoplastic resin, which is an excellent polymer material for the manufacture of chemical fibers and engineering plastics. It has the characteristics of high mechanical strength, high rigidity, good modification and strong reinforcement. It is one of the engineering plastics with the largest output and widest application in the world. Polypropylene plastic is widely used due to its low density, low price, and easy molding and processing, but it is rarely used in the field of engineering materials and structural materials due to its low actual strength (especially impact strength). The combination of these two components complement each other, so that the blend of PA6 / PP has excellent comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C45/78B29C43/58B29C43/36B29K77/00B29K23/00
Inventor 余木火马鹏朱姝杨春华滕翠青韩克清
Owner DONGHUA UNIV
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