CN104845142A - Low-warpage and high-strength PET/PTT alloy material - Google Patents

Abstract

The present invention discloses a low-warpage and high-strength PET/PTT alloy material which is composed of the following compositions in mass percentage ratio: 30%-60% PET, 20%-30% PTT, 2%-4% SMA, 8%-15% glass fiber, 4%-8% glass microbeads, 2%-8% nano silicon dioxide, 0.1%-0.5% antioxidant, 0.1%-1% TAF and 0.1%-1% PPFBS. The glass fiber is alkali-free glass fiber whose surface is treated by silane coupling agent and whose diameter is of 8-12 mu m, length of 3-6 mm, and length-diameter ratio range of 7-9. The beneficial effects of the low-warpage and high-strength PET/PTT alloy material are that the PET/PTT alloy material has the original excellent performance of each of PET and PTT, at the same time also significantly improves tensile strength, flexural strength, chemical resistance, etc., and has low warpage, good appearance, good dimensional stability, excellent flame resistance, wide adaptability and low cost, and is easy for promotion.

Description

Low warpage high-strength PET/PTT alloy material

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of low warpage high-strength PET/PTT alloy material.

Background technology

Polyethylene terephthalate (PET) a kind ofly has higher melt temperature and the crystalline polymer of second-order transition temperature, excellent physicals and mechanical property is kept in certain temperature range, its resistance to fatigue, rub resistance, ageing resistance, electrical insulating property feature are very outstanding, to most of organic solvent and acid more stable, production energy consumption is lower, is thus widely used in the fields such as synthon, film and engineering plastics; But because PET rigidity is comparatively forced toughness of material is poor, crystallization velocity is comparatively slow, the shortcomings such as the high and shaping cycle of forming mould temperature is long, greatly limit its range of application.Poly(Trimethylene Terephthalate) (PTT) is that a kind of crystallization velocity is fast, happy and harmonious temperature and the lower crystalline polymer of second-order transition temperature, there is excellent especially flexibility, elastic recovery, the stability feature of processing characteristics, electric property, mechanical property and size; PTT fiber maintains excellent crease resistance and the chemical resistant properties of PET fiber, flexibility, anti-Japanese photosensitiveness, resistance to soiling, low static behaviour, easy dyeing, low water absorption have the features such as certain hydrolytic stability.But its modulus is lower, material is softer limits PTT use range.By the PET/PTT alloy of blended for PET and PTT preparation, performance can be learnt from other's strong points to offset one's weaknesses, make to remain PET, PTT advantage separately, there is the premium propertiess such as excellent forming process, shock resistance, high temperature heat-resistant are aging, chemical-resistant resistance simultaneously.But because PTT is heated easy buckling deformation, and resistance to electric trace index (CTI) is lower, and under low temperature mould, article surface is coarse, and these will have influence on the use properties of PET/PTT alloy.

Summary of the invention

The object of the present invention is to provide low warpage high-strength PET/PTT alloy material that a kind of mechanical property is good, flame retardant resistance is excellent and with low cost.

The technical solution adopted for the present invention to solve the technical problems is: low warpage high-strength PET/PTT alloy material, and its component by mass percent proportioning is: PET 30% ~ 60%, PTT 20% ~ 30%, SMA 2% ~ 4%, glass fibre 8% ~ 15%, glass microballon 4% ~ 8%, nano silicon 2% ~ 8%, oxidation inhibitor 0.1% ~ 0.5%, TAF 0.1% ~ 1%, PPFBS 0.1% ~ 1%.

The polyethylene terephthalate of described PET to be intrinsic viscosity be 0.6 ~ 1.0dL/g.

Described PTT is the Poly(Trimethylene Terephthalate) of limiting viscosity 0.7 ~ 1.2dL/g.

Described SMA is styrene-grafted copolymer-maleic anhydride.

Described glass fibre be surface through silane coupling agent process and diameter 8 ~ 12 μm, length 3 ~ 6mm, alkali free glass fibre in length-to-diameter ratio 7 ~ 9 scope.

Described glass microballon is that surface is through 3-aminopropyl triethoxysilane modification, diameter 10 ~ 100 μm, density 0.4 ~ 1.1g/cm ³hollow glass micropearl.

Described oxidation inhibitor is the one in the compound of antioxidant 1010, antioxidant 1076, antioxidant 1010 or antioxidant 1076 and irgasfos 168.

Described TAF is modification ethylene bis-fatty acid amides.

Described PPFBS is perfluorinated sulfonic acid fire retardant perfluorobutyl potassium.

The preparation method of above-mentioned low warpage high-strength PET/PTT alloy material, comprises the following steps:

(1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by;

(2), taking dry PTT by weight ratio adds in super mixer, add glass microballon, nano silicon, oxidation inhibitor, TAF, PPFBS by weight ratio simultaneously, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging add twin screw extruder melt extrude pelletizing and dry after stand-by;

(3), taking dry PET by weight ratio adds in super mixer, simultaneously add SMA by weight ratio and step (2) obtains product, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging adds the main spout of twin screw extruder, add from the side spout of twin screw extruder the glass fibre taken by weight ratio simultaneously, by twin screw extruder melting mixing 1 ~ 2 minute, screw speed controls at 150 ~ 600r/min, processing temperature is 180 DEG C ~ 260 DEG C scopes, then extruding pelletization, obtain low warpage high-strength PET/PTT alloy material of the present invention.

The invention has the beneficial effects as follows, the present invention is having PET, PTT concurrently separately while original excellent properties, also significantly improve tensile strength, flexural strength, chemical resistance etc., and low warpage, outward appearance are good, good stability of the dimension, flame retardant resistance is excellent, wide adaptability, cost is low, is easy to promote.

Embodiment

Technical scheme of the present invention is further illustrated below in conjunction with specific embodiment.

Embodiment 1:

A kind of low warpage high-strength PET/PTT alloy material, its component by mass percent proportioning is: PET 60%, PTT 20%, SMA 3%, glass fibre 8%, glass microballon 4%, nano silicon 4%, antioxidant 1010 0.2%, TAF 0.7%, PPFBS 0.1%, described glass fibre be surface through silane coupling agent process and diameter 8 ~ 12 μm, length 3 ~ 6mm, alkali free glass fibre in length-to-diameter ratio 7 ~ 9 scope, described glass microballon be surperficial through 3-aminopropyl triethoxysilane modification, diameter 10 ~ 100 μm, density 0.4 ~ 1.1g/cm ³hollow glass micropearl.

Preparation method: (1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by, (2), taking dry PTT by weight ratio adds in super mixer, add glass microballon, nano silicon, antioxidant 1010, TAF, PPFBS by weight ratio simultaneously, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging add twin screw extruder melt extrude pelletizing and dry after stand-by, (3), taking dry PET by weight ratio adds in super mixer, simultaneously add SMA by weight ratio and step (2) obtains product, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging adds the main spout of twin screw extruder, add from the side spout of twin screw extruder the glass fibre taken by weight ratio simultaneously, by twin screw extruder melting mixing 1 ~ 2 minute, screw speed controls at 150 ~ 600r/min, processing temperature is 180 DEG C ~ 260 DEG C scopes, then extruding pelletization, obtain low warpage high-strength PET/PTT alloy material of the present invention.

Embodiment 2:

A kind of low warpage high-strength PET/PTT alloy material, its component by mass percent proportioning is: PET 36%, PTT 30%, SMA 4%, glass fibre 15%, glass microballon 6%, nano silicon 8%, the compound 0.2% of antioxidant 1076 and irgasfos 168, TAF 0.7%, PPFBS 0.1%, described glass fibre is that surface is through silane coupling agent process, and diameter is at 8 ~ 12 μm, length 3 ~ 6mm, alkali free glass fibre in length-to-diameter ratio 7 ~ 9 scope, described glass microballon is that surface is through 3-aminopropyl triethoxysilane modification, diameter 10 ~ 100 μm, density 0.4 ~ 1.1g/cm ³hollow glass micropearl.

Preparation method: (1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by, (2), taking dry PTT by weight ratio adds in super mixer, add compound, TAF, PPFBS of glass microballon, nano silicon, antioxidant 1076 and irgasfos 168 by weight ratio simultaneously, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging add twin screw extruder melt extrude pelletizing and dry after stand-by, (3), taking dry PET by weight ratio adds in super mixer, simultaneously add SMA by weight ratio and step (2) obtains product, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging adds the main spout of twin screw extruder, add from the side spout of twin screw extruder the glass fibre taken by weight ratio simultaneously, by twin screw extruder melting mixing 1 ~ 2 minute, screw speed controls at 150 ~ 600r/min, processing temperature is 180 DEG C ~ 260 DEG C scopes, then extruding pelletization, obtain low warpage high-strength PET/PTT alloy material of the present invention.

Claims (4)

1. one kind low warpage high-strength PET/PTT alloy material, it is characterized in that, its component by mass percent proportioning is: PET 30% ~ 60%, PTT 20% ~ 30%, SMA 2% ~ 4%, glass fibre 8% ~ 15%, glass microballon 4% ~ 8%, nano silicon 2% ~ 8%, oxidation inhibitor 0.1% ~ 0.5%, TAF 0.1% ~ 1%, PPFBS 0.1% ~ 1%.

2. low warpage high-strength PET/PTT alloy material according to claim 1, is characterized in that, described glass fibre be surface through silane coupling agent process and diameter 8 ~ 12 μm, length 3 ~ 6mm, alkali free glass fibre in length-to-diameter ratio 7 ~ 9 scope.

3. low warpage high-strength PET/PTT alloy material according to claim 1, is characterized in that, described glass microballon is that surface is through 3-aminopropyl triethoxysilane modification, diameter 10 ~ 100 μm, density 0.4 ~ 1.1g/cm ³hollow glass micropearl.

4. the preparation method of low warpage high-strength PET/PTT alloy material according to claim 1, is characterized in that, comprise the following steps:

(1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by;

(2), taking dry PTT by weight ratio adds in super mixer, add glass microballon, nano silicon, oxidation inhibitor, TAF, PPFBS by weight ratio simultaneously, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging add twin screw extruder melt extrude pelletizing and dry after stand-by;

(3), taking dry PET by weight ratio adds in super mixer, simultaneously add SMA by weight ratio and step (2) obtains product, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging adds the main spout of twin screw extruder, add from the side spout of twin screw extruder the glass fibre taken by weight ratio simultaneously, by twin screw extruder melting mixing 1 ~ 2 minute, screw speed controls at 150 ~ 600r/min, processing temperature is 180 DEG C ~ 260 DEG C scopes, then extruding pelletization, obtain low warpage high-strength PET/PTT alloy material of the present invention.