CN103254592A - Preparation method of polyethylene glycol terephthalate moulding compound - Google Patents
Preparation method of polyethylene glycol terephthalate moulding compound Download PDFInfo
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- CN103254592A CN103254592A CN2013102140187A CN201310214018A CN103254592A CN 103254592 A CN103254592 A CN 103254592A CN 2013102140187 A CN2013102140187 A CN 2013102140187A CN 201310214018 A CN201310214018 A CN 201310214018A CN 103254592 A CN103254592 A CN 103254592A
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Abstract
The invention discloses a preparation method of a polyethylene glycol terephthalate moulding compound, which belongs to the technical field of high polymer materials. The preparation method comprises the following steps of: drying 25-31 parts of polyethylene glycol terephthalate for 10.5 hours at 125 DEG C; pouring the dried polyethylene glycol terephthalate in a high-speed mixing machine; then pouring 5-9 parts of amorphous polyester resin, 3-7 parts of a toughener, 6-11 parts of a flame retardant, 20-29 parts of a filler, 0.3-0.7 parts of an antioxidant, 6-15 parts of reinforced fibres, and 0.8-1.4 parts of carbon black into the high-speed mixing machine; mixing in the high-speed mixing machine at the rotational speed of 550 n/min; then transferring the mixture into a parallel double-screw extruder, and performing melt extrusion; and cooling, slicing and drying to obtain the finished product, wherein the temperatures of screws in 1-12 areas are controlled to be 210 DEG C, 215 DEG C, 225 DEG C, 235 DEG C, 245 DEG C, 255 DEG C, 265 DEG C, 265 DEG C, 265 DEG C, 265 DEG C, 265 DEG C and 265 DEG C. The polyethylene glycol terephthalate moulding compound has the following performance indexes: a tensile strength of 135-158 MPa, a bending strength of 200-220 MPa, a notch impact strength of 60-80 j/m, flame resistance of V-0 (UL-94-3.0 mm), and a thermal deformation temperature of 210-230 DEG C, thus being low in shrinkage.
Description
Technical field
The invention belongs to field of polymer material preparing technology, be specifically related to a kind of preparation method of polyethylene terephthalate moulding compound.
Background technology
Polyethylene terephthalate be by terephthalic acid and ethylene glycol through polycondensation and the base application resin, it is strong that polyethylene terephthalate has crystallization, characteristics that fusing point is high, but do not reach the industrial application requirement because of its intensity shortcoming.Chinese patent CN102161817A improves the intensity of goods by introducing carbon fiber, and the phase gets and reaches application requiring, and still, intensity still is not enough to satisfy the service requirements of industry, and shrinkage coefficient is big.
Summary of the invention
Task of the present invention is to provide a kind of preparation method of polyethylene terephthalate moulding compound, and the moulding compound that is obtained by this method has the intensity height, shrinks little characteristics.
Task of the present invention is finished like this, a kind of preparation method of polyethylene terephthalate moulding compound, it is 25～31 parts of dry 10.5h under 125 ℃ of polyethylene terephthalate that will take by weighing by weight earlier, drop in the high-speed mixer dry back, then drop into 5～9 parts of the non-crystalline polyester resin that take by weighing by weight in the high-speed mixer, 3 ~ 7 parts of toughner, 6 ~ 11 parts of fire retardants, 20 ~ 29 parts of fillers, 0.3 ~ 0.7 part in oxidation inhibitor, 0.8 ~ 1.4 part of 6 ~ 15 parts of fortifying fibres and carbon black, be to mix 6min under the speed of 550n/min at the rotating speed of high-speed mixer, obtain compound; Then compound is changed in the parallel twin screw extruder and melt extrude, obtain the polyethylene terephthalate moulding compound after cooling, pelletizing and drying, wherein: extruder temperature Zi Yi district to the No.12 District of twin screw extruder is controlled to be respectively: 210 ℃ of district's temperature, 215 ℃ of two district's temperature, 225 ℃ of three district's temperature, 235 ℃ of four district's temperature, 245 ℃ of five district's temperature, 255 ℃ of six district's temperature, 265 ℃ of seven district's temperature, 265 ℃ of eight district's temperature, 265 ℃ of nine district's temperature, 265 ℃ of ten district's temperature, 265 ℃ of Shi Yi district temperature, 265 ℃ of No.12 District temperature.
In one embodiment of the invention, described pet resin be fusing point at 250 ℃, the limiting viscosity index is the polyethylene terephthalate of 0.65dl/g.
In another embodiment of the present invention, described non-crystalline polyester resin is softening temperature at 120 ℃ saturated polyester resin.
In yet another embodiment of the present invention, described toughner is polyester-polyethers thermoplastic elastomer, and wherein polyester segments is polyethylene terephthalate, and the polyethers section is polytetramethylene ether.
In another embodiment of the present invention, described fire retardant is TDE.
Also have among the embodiment of the present invention, described filler is calcium carbonate.
More of the present invention and among embodiment, described oxidation inhibitor is the two dodecane esters of thio-2 acid.
In of the present invention and then embodiment, described fortifying fibre is the alkali free glass fibre of length 6mm.
Of the present invention again more and among embodiment, described carbon black is thermally oxidized black.
The polyethylene terephthalate moulding compound that the inventive method obtains has following performance index after tested: tensile strength 135～158MPa, and flexural strength 200～220MPa, notched Izod impact strength 60～80j/m, flame retardant resistance reaches V-0 (UL-94-3.0mm); Heat-drawn wire is 210～230 ℃, thereby shrinks little.
Embodiment
Embodiment 1:
The fusing point that will take by weighing by weight is that 31 parts of the polyethylene terephthalates of 0.65dl/g are at 125 ℃ of dry 10.5h down at 250 ℃ and limiting viscosity index earlier, drop in the high-speed mixer dry back, then drop into the softening temperature that takes by weighing by weight in the high-speed mixer 5 parts of 120 ℃ saturated polyester resins, polyester segments is polyethylene terephthalate, the polyethers section is 7 parts of the polyester-polyethers thermoplastic elastomer of polytetramethylene ether, 11 parts of TDE, 20 parts in calcium carbonate, 0.3 part of the two dodecane ester of thio-2 acid, length is 0.8 part of 12 parts of the alkali free glass fibres of 6mm and the carbon black produced by channel process, be to mix 6min under the speed of 550n/min at the rotating speed of high-speed mixer, obtain compound; Then compound is changed in the parallel twin screw extruder and melt extrude, obtain the polyethylene terephthalate moulding compound after cooling, pelletizing and drying, wherein: extruder temperature Zi Yi district to the No.12 District of twin screw extruder is controlled to be respectively: 210 ℃ of district's temperature, 215 ℃ of two district's temperature, 225 ℃ of three district's temperature, 235 ℃ of four district's temperature, 245 ℃ of five district's temperature, 255 ℃ of six district's temperature, 265 ℃ of seven district's temperature, 265 ℃ of eight district's temperature, 265 ℃ of nine district's temperature, 265 ℃ of ten district's temperature, 265 ℃ of Shi Yi district temperature, 265 ℃ of No.12 District temperature.
Embodiment 2:
The fusing point that will take by weighing by weight is that 25 parts of the polyethylene terephthalates of 0.65dl/g are at 125 ℃ of dry 10.5h down at 250 ℃ and limiting viscosity index earlier, drop in the high-speed mixer dry back, then drop into the softening temperature that takes by weighing by weight in the high-speed mixer 9 parts of 120 ℃ saturated polyester resins, polyester segments is polyethylene terephthalate, the polyethers section is 5 parts of the polyester-polyethers thermoplastic elastomer of polytetramethylene ether, 9 parts of TDE, 29 parts in calcium carbonate, 0.7 part of the two dodecane ester of thio-2 acid, length is 1 part of 15 parts of the alkali free glass fibres of 6mm and the carbon black produced by channel process, be to mix 6min under the speed of 550n/min at the rotating speed of high-speed mixer, obtain compound; Then compound is changed in the parallel twin screw extruder and melt extrude, obtain the polyethylene terephthalate moulding compound after cooling, pelletizing and drying, wherein: extruder temperature Zi Yi district to the No.12 District of twin screw extruder is controlled to be respectively: 210 ℃ of district's temperature, 215 ℃ of two district's temperature, 225 ℃ of three district's temperature, 235 ℃ of four district's temperature, 245 ℃ of five district's temperature, 255 ℃ of six district's temperature, 265 ℃ of seven district's temperature, 265 ℃ of eight district's temperature, 265 ℃ of nine district's temperature, 265 ℃ of ten district's temperature, 265 ℃ of Shi Yi district temperature, 265 ℃ of No.12 District temperature.
Embodiment 3:
The fusing point that will take by weighing by weight is that 29 parts of the polyethylene terephthalates of 0.65dl/g are at 125 ℃ of dry 10.5h down at 250 ℃ and limiting viscosity index earlier, drop in the high-speed mixer dry back, then drop into the softening temperature that takes by weighing by weight in the high-speed mixer 8 parts of 120 ℃ saturated polyester resins, polyester segments is polyethylene terephthalate, the polyethers section is 3 parts of the polyester-polyethers thermoplastic elastomer of polytetramethylene ether, 6 parts of TDE, 25 parts in calcium carbonate, 0.4 part of the two dodecane ester of thio-2 acid, length is 1.2 parts of 10 parts of the alkali free glass fibres of 6mm and the carbon blacks produced by channel process, be to mix 6min under the speed of 550n/min at the rotating speed of high-speed mixer, obtain compound; Then compound is changed in the parallel twin screw extruder and melt extrude, obtain the polyethylene terephthalate moulding compound after cooling, pelletizing and drying, wherein: extruder temperature Zi Yi district to the No.12 District of twin screw extruder is controlled to be respectively: 210 ℃ of district's temperature, 215 ℃ of two district's temperature, 225 ℃ of three district's temperature, 235 ℃ of four district's temperature, 245 ℃ of five district's temperature, 255 ℃ of six district's temperature, 265 ℃ of seven district's temperature, 265 ℃ of eight district's temperature, 265 ℃ of nine district's temperature, 265 ℃ of ten district's temperature, 265 ℃ of Shi Yi district temperature, 265 ℃ of No.12 District temperature.
Embodiment 4:
The fusing point that will take by weighing by weight is that 27 parts of the polyethylene terephthalates of 0.65dl/g are at 125 ℃ of dry 10.5h down at 250 ℃ and limiting viscosity index earlier, drop in the high-speed mixer dry back, then drop into the softening temperature that takes by weighing by weight in the high-speed mixer 7 parts of 120 ℃ saturated polyester resins, polyester segments is polyethylene terephthalate, the polyethers section is 4 parts of the polyester-polyethers thermoplastic elastomer of polytetramethylene ether, 8 parts of TDE, 22 parts in calcium carbonate, 0.6 part of the two dodecane ester of thio-2 acid, length is 1.4 parts of 6 parts of the alkali free glass fibres of 6mm and the carbon blacks produced by channel process, be to mix 6min under the speed of 550n/min at the rotating speed of high-speed mixer, obtain compound; Then compound is changed in the parallel twin screw extruder and melt extrude, obtain the polyethylene terephthalate moulding compound after cooling, pelletizing and drying, wherein: extruder temperature Zi Yi district to the No.12 District of twin screw extruder is controlled to be respectively: 210 ℃ of district's temperature, 215 ℃ of two district's temperature, 225 ℃ of three district's temperature, 235 ℃ of four district's temperature, 245 ℃ of five district's temperature, 255 ℃ of six district's temperature, 265 ℃ of seven district's temperature, 265 ℃ of eight district's temperature, 265 ℃ of nine district's temperature, 265 ℃ of ten district's temperature, 265 ℃ of Shi Yi district temperature, 265 ℃ of No.12 District temperature.
The polyethylene terephthalate moulding compound that is obtained by above-described embodiment 1 to 4 has following technique effect after tested:
| Test event | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Tensile strength MPa | 136 | 143 | 149 | 157 |
| Flexural strength MPa | 201 | 209 | 215 | 220 |
| Notched Izod impact strength j/m | 60.2 | 65.8 | 70.4 | 78.4 |
| Flame retardant resistance (UL-94-3.0mm) | V-0 | V-0 | V-0 | V-0 |
| Heat-drawn wire ℃ | 212 | 217 | 224 | 228 |
Claims (9)
1. the preparation method of a polyethylene terephthalate moulding compound, it is characterized in that it is 25～31 parts of dry 10.5h under 125 ℃ of polyethylene terephthalate that take by weighing by weight, drop in the high-speed mixer dry back, then drop into 5～9 parts of the non-crystalline polyester resin that take by weighing by weight in the high-speed mixer, 3 ~ 7 parts of toughner, 6 ~ 11 parts of fire retardants, 20 ~ 29 parts of fillers, 0.3 ~ 0.7 part in oxidation inhibitor, 0.8 ~ 1.4 part of 6 ~ 15 parts of fortifying fibres and carbon black, be to mix 6min under the speed of 550n/min at the rotating speed of high-speed mixer, obtain compound; Then compound is changed in the parallel twin screw extruder and melt extrude, obtain the polyethylene terephthalate moulding compound after cooling, pelletizing and drying, wherein: extruder temperature Zi Yi district to the No.12 District of twin screw extruder is controlled to be respectively: 210 ℃ of district's temperature, 215 ℃ of two district's temperature, 225 ℃ of three district's temperature, 235 ℃ of four district's temperature, 245 ℃ of five district's temperature, 255 ℃ of six district's temperature, 265 ℃ of seven district's temperature, 265 ℃ of eight district's temperature, 265 ℃ of nine district's temperature, 265 ℃ of ten district's temperature, 265 ℃ of Shi Yi district temperature, 265 ℃ of No.12 District temperature.
2. the preparation method of polyethylene terephthalate moulding compound according to claim 1, it is characterized in that described pet resin be fusing point at 250 ℃, the limiting viscosity index is the polyethylene terephthalate of 0.65dl/g.
3. the preparation method of polyethylene terephthalate moulding compound according to claim 1 is characterized in that described non-crystalline polyester resin is softening temperature at 120 ℃ saturated polyester resin.
4. the preparation method of polyethylene terephthalate moulding compound according to claim 1 is characterized in that described toughner is polyester-polyethers thermoplastic elastomer, and wherein polyester segments is polyethylene terephthalate, and the polyethers section is polytetramethylene ether.
5. the preparation method of polyethylene terephthalate moulding compound according to claim 1 is characterized in that described fire retardant is TDE.
6. the preparation method of polyethylene terephthalate moulding compound according to claim 1 is characterized in that described filler is calcium carbonate.
7. the preparation method of polyethylene terephthalate moulding compound according to claim 1 is characterized in that described oxidation inhibitor is the two dodecane esters of thio-2 acid.
8. the preparation method of polyethylene terephthalate moulding compound according to claim 1 is characterized in that described fortifying fibre is the alkali free glass fibre of length 6mm.
9. the preparation method of polyethylene terephthalate moulding compound according to claim 1 is characterized in that described carbon black is thermally oxidized black.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845292A (en) * | 2015-05-06 | 2015-08-19 | 安徽省佳艺休闲用品有限公司 | Inflaming-retarding plastic container |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747599A (en) * | 2008-12-16 | 2010-06-23 | 金发科技股份有限公司 | Antistatic modified polyester and method for preparing same |
| CN102061071A (en) * | 2010-12-30 | 2011-05-18 | 金发科技股份有限公司 | Halogen-free flame retardant polyester with laser marking function and preparation method thereof |
| CN102199338A (en) * | 2011-04-08 | 2011-09-28 | 扬州三星塑胶有限公司 | APET/PETG composite material and its production technology |
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- 2013-05-31 CN CN2013102140187A patent/CN103254592A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747599A (en) * | 2008-12-16 | 2010-06-23 | 金发科技股份有限公司 | Antistatic modified polyester and method for preparing same |
| CN102061071A (en) * | 2010-12-30 | 2011-05-18 | 金发科技股份有限公司 | Halogen-free flame retardant polyester with laser marking function and preparation method thereof |
| CN102199338A (en) * | 2011-04-08 | 2011-09-28 | 扬州三星塑胶有限公司 | APET/PETG composite material and its production technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845292A (en) * | 2015-05-06 | 2015-08-19 | 安徽省佳艺休闲用品有限公司 | Inflaming-retarding plastic container |
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Application publication date: 20130821 |