Low-shrinkage glass fiber reinforced PP/PA (Polypropylene/Polyamide) composite material composition and preparation method thereof
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A technology of composite materials and low shrinkage rate, which is applied in the field of low shrinkage glass fiber reinforced PP/PA composite material composition and its preparation, can solve problems such as large shrinkage rate, general alloy performance, and weakened PA material strength, and achieve quality Stability, high toughness, and the effect of improving processing fluidity
Inactive Publication Date: 2014-05-14
SHANGHAI SUNNY
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Problems solved by technology
However, pure PP and PA are not well compatible, and the performance of the alloy obtained by direct blending and extrusion is very general, and the addition of PP has a weakening effect on the strength of PA materials.
In addition, both PP and PA have the defect of large shrinkage rate.
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Embodiment 1～3
[0028] The present examples 1-3 relate to a kind of high-strength, high-toughness low-shrinkage glass fiber reinforced PP / PA composite material composition; its preparation method comprises the following steps:
[0029] 1.1 Preparation of polyamide masterbatch A
[0030] The raw materials were weighed according to the parts by weight in Table 1, wherein the compatibilizer a was ethylene-octene copolymerized thermoplastic elastomer grafted with maleic anhydride.
[0031] Table 1
[0032] raw material name
Polyamide
80
80
Compatibilizer a
10
0
extruded granulated product
A1
A2
[0033] Put the weighed raw materials into the high mixer and mix for 2 to 5 minutes, discharge the material, and then extrude and granulate with a twin-screw extruder. The first stage is 225°C, the third stage is 230°C, the fourth stage is 235°C, the fifth stage is 235°C, the sixth stage is 235°C, the seventh stage is 230°C, the ...
Embodiment 4～6
[0047] Examples 4-6 relate to a high-strength, high-toughness low-shrinkage glass fiber-reinforced PP / PA composite material composition; its preparation method is the same as that of Example 1, except that:
[0048] 1. Weigh each raw material according to the parts by weight shown in Table 4 to prepare polyamide masterbatches A3, A4, and A5.
[0049] Table 4
[0050] raw material name
[0051] 2. Weigh each raw material according to parts by weight in Table 5 to prepare a glass fiber reinforced PP / PA composite material composition with high strength, high toughness and low shrinkage.
[0052] table 5
[0053] raw material name
[0054] The composite materials prepared in Examples 4-6 were subjected to performance tests using ASTM standards, and the performance test results are shown in Table 6.
[0055] Table 6
[0056] Test parameters
[0057] It can be seen from the above tables 3 and 6 that the glass fiber reinforced PP / PA composite mater...
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Abstract
The invention discloses a low-shrinkage glass fiber reinforced PP/PA (Polypropylene/Polyamide) composite material composition and a preparation method thereof. The composition comprises 10-80 parts of polypropylene, 10-80 parts of polyamide, 5-25 parts of compatilizers, 10-80 parts of glass fiber, 0.1-5 parts of antioxidant and 0.1-5 parts of lubrication dispersing agent. The preparation method comprises the following steps: when the composition material is prepared, commixing the polyamide and a compatilizer a (ethylene-octylene copolymerization thermoplastic elastomer grafted maleic anhydride), discharging, and extruding to pellet so as to obtain polyamide master batch A; and commixing the polyamide master batch A with polypropylene, an antioxidant, the lubrication dispersing agent and a compatilizer b (homo-polypropylene grafted maleic anhydride), discharging, and extruding to pellet by using a double-screw rod extruding machine so as to obtain the composition. The glass fiber reinforced PP/PA composite disclosed by the invention has the advantages of high strength, high toughness, low shrinkage, stable quality and excellent comprehensive mechanics property, and can be widely applied to products of fields such as inner and outer automobile components and electronic devices.
Description
technical field [0001] The invention relates to a PP / PA composite material, in particular to a low-shrinkage glass fiber reinforced PP / PA composite material composition and a preparation method thereof. Background technique [0002] Polyamide (abbreviated as PA), commonly known as nylon, has been widely used in automobiles, electronics, machinery and other fields because of its good strength, wear resistance, oil resistance and wide temperature range. However, with the rapid development of the electronics, electrical and automotive industries in recent years, the demand for high-strength, high-toughness engineering plastics is increasing. The commonly used polyamide engineering plastics have gradually become increasingly popular due to their high water absorption, low temperature and low dry impact strength. It cannot meet the performance requirements of many automobile and electrical components. Polypropylene (referred to as PP) has the characteristics of good toughness an...
Claims
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