CN115058102A - Glass fiber reinforced PBT/PET alloy material with smooth surface and preparation method thereof - Google Patents
Glass fiber reinforced PBT/PET alloy material with smooth surface and preparation method thereof Download PDFInfo
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Abstract
The inventionDiscloses a glass fiber reinforced PBT/PET alloy material with smooth surface and a preparation method thereof, wherein the glass fiber reinforced PBT/PET alloy material comprises the following components by 100 percent: the heat stabilizer comprises, by weight, 30-60% of PBT, 10-40% of PET, 10-40% of glass fiber, 5-25% of glass beads, 0.1-2% of nucleating agent, 0.1-2% of ester exchange inhibitor, 0.1-2% of lubricating dispersant and 0.1-1% of heat stabilizer. The alloy material prepared by the invention has the advantages of smooth surface, high glossiness, stable size and difficult warpage, the difference between the shrinkage rates of the alloy material in the horizontal direction and the vertical direction is less than or equal to 0.1 percent, the size of the alloy material is more stable, the mechanical property and the heat resistance of the alloy material are excellent, the tensile strength is up to 135-145 MPa, and the notch impact strength is more than or equal to 10.0KJ/m 2 The heat distortion temperature is more than or equal to 195 ℃, the crystallization temperature is more than or equal to 190.6 ℃, the half-peak width of the crystal is more than or equal to 8.5 ℃, and the method can be widely applied to the field of manufacturing parts for electronic appliances, automobiles and machinery.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, particularly relates to a PBT/PET alloy material, and particularly relates to a glass fiber reinforced PBT/PET alloy material and a preparation method thereof, which are suitable for manufacturing parts for electronic appliances, automobiles and machinery which are required to have excellent appearance, stable size and high performance.
Background
Polybutylene terephthalate (PBT) is a crystalline saturated polyester resin with excellent properties, which has excellent thermal aging resistance, chemical resistance, and electrical insulation properties. When the PBT resin is used for engineering plastics, the defects of large shrinkage, low toughness, notch sensitivity and the like exist, so the PBT resin needs to be modified, and the modification mainly comprises glass fiber reinforcement, toughening, flame retardation reinforcement and the like. The Glass Fiber (GF) -reinforced modified PBT can greatly improve the mechanical property, heat resistance and dimensional stability of the PBT, but the addition of GF brings disadvantages, and because the crystallization speed of the PBT is high, resin is rapidly cooled on the surface of a mold in the molding process, a large amount of glass fibers are mixed and stay on the surface of a workpiece to form a phenomenon of so-called 'fiber floating', the surface appearance of the product is seriously influenced, and meanwhile, the warpage of the workpiece is serious due to the orientation of the glass fibers and the high crystallization speed of the material.
In the prior art, chinese patent CN101580632B discloses a high-gloss high-performance glass fiber reinforced PBT material and a preparation method thereof, which comprises the following components in percentage by weight: 30-50% of PBT resin, 9-18% of PMMA resin, 5-10% of special compatible modifier, 10-50% of glass fiber, 2-4% of special nucleating agent, 3-5% of special heat-resistant agent and 1-3% of composite coupling agent. The invention has excellent comprehensive mechanical property and high glossiness. CN105273374B discloses a high-performance anti-warping glass fiber reinforced PBT/ASA alloy material, which comprises the following components in percentage by weight: 30-60% of PBT resin, 5-20% of mineral, 10-40% of ASA resin, 1-5% of toughening agent, 5-30% of glass fiber, 0.1-1.5% of nucleating agent and 0.8-1.5% of processing aid. The PBT composite material can be prepared into a PBT composite material with excellent mechanical properties and low warping property, and can be used for parts which are easy to warp and have high aging requirements, such as external rotating trim strips of trucks.
The above patent improves appearance and dimensional stability of the reinforced PBT material by introducing the amorphous resin component, but the amorphous resin component has compatibility problem with the PBT resin of linear polyester structure, and although the compatibility of two phases can be improved by adding a compatibilizer, the application in high performance field is limited due to the decrease of material performance and increase of cost.
Disclosure of Invention
The invention aims to provide a glass fiber reinforced PBT/PET alloy material with good appearance and performance, no warpage, stable size and smooth surface, aiming at the defects and the defects of rough appearance, serious warpage, low material performance, high cost and the like of the product in the prior art.
The invention also aims to provide a preparation method of the glass fiber reinforced PBT/PET alloy material with smooth surface.
In order to achieve the purpose, the crystallization temperature and the crystallization rate of the alloy material are regulated and controlled by utilizing the PET, the nucleating agent and the ester exchange inhibitor, so that the alloy material obtains excellent appearance and performance in a wider processing temperature range, the warping of the alloy material is reduced through the reinforcement of the glass bead composite glass fiber, and the dimensional stability of the alloy material is improved. The method is realized by the following technical scheme.
The invention relates to a glass fiber reinforced PBT/PET alloy material with smooth surface, which comprises the following components in percentage by mass based on 100 percent: the heat stabilizer comprises, by weight, 30-60% of PBT, 10-40% of PET, 10-40% of glass fiber, 5-25% of glass beads, 0.1-2% of nucleating agent, 0.1-2% of ester exchange inhibitor, 0.1-2% of lubricating dispersant and 0.1-1% of heat stabilizer.
As the optimization of the invention, the sum of the raw material components by mass is 100 percent, and the content of each component is as follows: the composite material comprises, by weight, 40-49% of PBT, 13-19% of PET, 15-30% of glass fiber, 8-20% of glass beads, 0.4-1.4% of nucleating agent, 0.3-1.3% of ester exchange inhibitor, 0.25-1.0% of lubricating dispersant and 0.3-0.8% of heat stabilizer.
Further, the PBT is prepared by an ester exchange method or a direct esterification method, and the intrinsic viscosity is 0.75 dL/g-1.2 dL/g; the PET is prepared by a direct esterification method process, and the intrinsic viscosity is 0.6 dL/g-0.9 dL/g.
Further, the glass fiber is alkali-free glass fiber treated by a silane coupling agent, and the diameter of a monofilament is 7-13 um; the average particle size of the hollow glass beads is 10-50 um, the hollow and solid glass beads with a regular spherical structure are any one or a mixture of more than two, and the surface modifier is any one or a mixture of more than two of a silane coupling agent, a titanate coupling agent and an aluminate coupling agent through surface treatment modification.
Further, the nucleating agent is any one of inorganic nucleating agent and organic macromolecular nucleating agent or a mixture of two or more of the inorganic nucleating agent and the organic macromolecular nucleating agent.
Further, the inorganic nucleating agent is one of talcum powder, montmorillonite and hydrotalcite, and the organic macromolecular nucleating agent is one of ionic polymers.
Further, the ester exchange inhibitor is any one or a mixture of more than two of small-molecule triphenyl phosphite, disodium dihydrogen phosphate and macromolecular ethylene glycidyl acrylate.
Further, the heat stabilizer is any one or a mixture of more than two of phenols and phosphites; the lubricating dispersant is pentaerythritol stearate.
The invention relates to a preparation method of a glass fiber reinforced PBT/PET alloy material with a smooth surface, which is characterized in that PBT, PET, glass beads, a nucleating agent, an ester exchange inhibitor, a lubricating dispersant and a heat stabilizer are uniformly mixed in a high-speed mixer according to mass percentage, the mixed material is added into a main feeder of a double-screw extruder in a metering manner, glass fibers are added from a side feeding port in a metering manner, and the mixture is prepared by melting, mixing, extruding and granulating; the mixing speed of the high-speed mixer is 480-550 rad/min, the rotating speed of a main machine of the double-screw extruder is 350-450 rad/min, and the processing temperatures from a feeding port to a machine head are 215-225 ℃ in a first zone, 245-255 ℃ in a second zone, 245-255 ℃ in a third zone, 245-255 ℃ in a fourth zone, 235-245 ℃ in a fifth zone, 225-235 ℃ in a sixth zone, 225-235 ℃ in a seventh zone, 225-235 ℃ in an eighth zone, 225-235 ℃ in a ninth zone and 235-245 ℃ in the machine head. Wherein the temperature of the first zone is lower and is 215-225 ℃; the temperature of the second zone, the third zone and the fourth zone is equal, and the constant temperature is kept between 245 and 255 ℃; the temperature of the fifth zone is lower than that of the second zone, the third zone and the fourth zone by about 10 ℃, the temperature of the sixth zone, the seventh zone, the eighth zone and the ninth zone is equal, and the constant temperature is further reduced to 225-235 ℃; the temperature of the machine head is increased by about 10 ℃ compared with that of the nine areas.
Research shows that the alloy material with excellent performance can be prepared by regulating and controlling material components and strictly controlling the temperature of each area.
Compared with the prior art, the glass fiber reinforced PBT/PET alloy material with smooth surface and the preparation method thereof have the following beneficial effects:
(1) the crystallization temperature and the crystallization rate of the alloy material are regulated and controlled by adopting PET, nucleating agent and ester exchange inhibitor, so that the alloy material can obtain excellent appearance and performance within a wider processing temperature range;
(2) the glass beads are added into the alloy material, and due to the characteristics of a regular spherical structure and isotropy, the warping of the alloy material caused by the glass fibers is effectively improved, and the surface glossiness of the alloy material is improved;
(3) the PBT resin and the PET resin have similar structures and belong to linear polyester, the compatibility among the resins is good, and a compatilizer is not required to be added into the alloy material, so that the prepared alloy material has excellent performance and lower cost;
(4) test results show that the glass fiber reinforced PBT/PET alloy material prepared by the invention has smooth surface, high glossiness, stable alloy material size and less possibility of warping, the shrinkage difference between the horizontal direction and the vertical direction of the alloy material is less than or equal to 0.1%, the alloy material size is more stable, the mechanical property and the heat resistance of the alloy material are excellent, the tensile strength is up to 135-145 MPa, and the notch impact strength is more than or equal to 10.0KJ/m 2 The thermal deformation temperature is more than or equal to 195 ℃, the crystallization temperature is more than or equal to 190.6 ℃, and the crystallization half-peak width is more than or equal to 8.5 ℃.
Drawings
FIG. 1 is a DSC cooling curve of the glass fiber reinforced PBT/PET alloy material with smooth surface of the invention and the examples 1, comparative examples 2, 3 and 4 of the preparation method thereof.
Detailed Description
In order to describe the invention, the following will explain in detail a glass fiber reinforced PBT/PET alloy material with smooth surface and its preparation method in combination with the examples. The invention is not limited to the examples.
The examples and comparative examples used the following raw materials:
PBT resin, XW321, intrinsic viscosity 1.0 +/-0.02 dL/g; GX121, intrinsic viscosity 0.82. + -. 0.015dL/g, medium petrochemical and chemical characterization, Inc.
PET resin, FG600, intrinsic viscosity 0.675. + -. 0.01dL/g, medium petrochemical company, Limited liability.
Glass fiber ECS11-4.5-534A, monofilament diameter 11um, China boulder group.
Glass bead, GS150, average particle size 30um, Middling Steel group Maanshan Ministry of mining materials science and technology, Inc.
Nucleating agent, talc (talc), 5000 mesh, commercially available; ethylene acrylic acid sodium salt ionomer, Aclyn285P, Honiville, USA.
Transesterification inhibitors, triphenyl phosphite, content > 98%, are commercially available.
Lubricant dispersant PETS, PE50, PG, Germany.
Heat stabilizer, phosphite ester 168, phenolic antioxidant 1010 and Taiwan double bond chemical industry.
The glass bead/glass fiber reinforced PBT/PET alloy material also comprises any one or a mixture of more than two of colorant inorganic pigments, organic pigments and solvent dyes within the range of not influencing the effect of the invention.
Examples 1 to 4
The compositions of examples 1 to 4 in terms of mass% are shown in Table 1.
The preparation method of the embodiment 1-4 comprises the following steps:
mixing PBT resin, PET resin, glass beads, nucleating agent, ester exchange inhibitor, lubricating dispersant and heat stabilizer in a high-speed mixer for 3 minutes at a mixing speed of 500rad/min, metering the mixed material into a main feeder of a double-screw extruder, metering glass fiber from a side feeding port, melting, mixing, extruding and granulating to obtain the glass fiber reinforced PBT/PET alloy material with a smooth surface.
Wherein the rotation speed of the main machine of the double-screw extruder is 400rad/min, and the processing temperatures from the feeding port to the machine head are 220 ℃ in a first zone, 250 ℃ in a second zone, 250 ℃ in a third zone, 250 ℃ in a fourth zone, 240 ℃ in a fifth zone, 230 ℃ in a sixth zone, 230 ℃ in a seventh zone, 230 ℃ in an eighth zone, 230 ℃ in a ninth zone and 240 ℃ in the machine head respectively.
TABLE 1 quality fraction table of each component in examples 1 to 4
| Composition of | 1 | 2 | 3 | 4 | Remarks to note |
| PBTXW123(％) | 45 | 45 | PBT resin | ||
| PBTGX121(％) | 45 | 45 | PBT resin | ||
| PETFG600(％) | 18 | 18 | 18 | 18 | PET resin |
| ECS11-4.5-534A(％) | 25 | 25 | 25 | 25 | Glass fiber |
| Glass bead GS150 (%) | 10 | 10 | 10 | 10 | Hollow glass bead |
| Talc htp1L (%) | 0.5 | 0.5 | Nucleating agent | ||
| Aclyn285P(％) | 0.5 | 0.5 | Nucleating agent | ||
| Transesterification inhibitor TPPi (%) | 0.5 | 0.5 | 0.5 | 0.5 | Ester interchange inhibitor |
| Lubricating dispersant PETS (%) | 0.5 | 0.5 | 0.5 | 0.5 | Lubricating dispersants |
| Phosphite 168 (%) | 0.3 | 0.3 | 0.3 | 0.3 | Heat stabilizer |
| Phenol antioxidant 1010 (%) | 0.2 | 0.2 | 0.2 | 0.2 | Heat stabilizer |
Comparative examples 1 to 4
The compositions of comparative examples 1 to 4 in terms of mass percent are shown in Table 2.
The preparation method of comparative examples 1 to 4 was: mixing PBT resin, PET resin, glass beads, nucleating agent, ester exchange inhibitor, lubricating dispersant and heat stabilizer in a high-speed mixer for 5 minutes at a mixing speed of 400rad/min, adding the mixed material into a main feeder of a double-screw extruder in a metering manner, adding glass fibers from a side feeding port in a metering manner, and carrying out melting, mixing, extruding and granulating to obtain the glass fiber reinforced PBT/PET alloy material. Wherein the rotating speed of the main machine of the double-screw extruder is 360rad/min, and the processing temperatures from the feeding port to the machine head are 220 ℃ in the first zone, 250 ℃ in the second zone, 250 ℃ in the third zone, 250 ℃ in the fourth zone, 240 ℃ in the fifth zone, 240 ℃ in the sixth zone, 240 ℃ in the seventh zone, 240 ℃ in the eighth zone, 230 ℃ in the ninth zone and 240 ℃ in the machine head respectively.
TABLE 2 quality fraction table of each component of comparative examples 1 to 4
| Composition of | 1 | 2 | 3 | 4 | Remarks for note |
| PBTXW123(％) | 69 | 64 | 46 | 45.5 | PBT resin |
| PETFG600(％) | 18 | 18 | PET resin | ||
| ECS11-4.5-534A(％) | 30 | 25 | 25 | 25 | Glass fiber |
| Glass bead GS150 (%) | 10 | 10 | 10 | Hollow glass bead | |
| Transesterification inhibitor TPPi (%) | 0.5 | Ester interchange inhibitor | |||
| Lubricating dispersant PETS (%) | 0.5 | 0.5 | 0.5 | 0.5 | Lubricating dispersants |
| Phosphite 168 (%) | 0.3 | 0.3 | 0.3 | 0.3 | Heat stabilizer |
| Phenol antioxidant 1010 (%) | 0.2 | 0.2 | 0.2 | 0.2 | Heat stabilizer |
Performance test
The testing standard and method of the glass fiber reinforced PBT/PET alloy material prepared by the embodiment and the comparative example are as follows:
the tensile property test is carried out according to GB/T1040-2018, and the tensile speed is 20 min/min;
the impact strength of the cantilever beam notch is performed according to GB/T1043-2008, and the notch is a V-shaped notch;
the thermal deformation temperature is carried out according to GB/T1634-2004, the span is 64mm, and the heating rate is 120 ℃/hr;
the shrinkage rate is measured by adopting ISO294-4, the shrinkage rates in the horizontal direction and the vertical direction are respectively measured, the glossiness is according to the ISO2813 standard, an angle of 60 degrees is adopted, and the surface appearance and the warping degree of the color plate are observed by a visual observation method;
the crystallization temperature and rate are measured by DSC analysis and calculation, and the measurement method is as follows: taking 8-15 mg of dried particles, heating to 290 ℃ at a speed of 10 ℃/min, keeping the temperature for 3min to eliminate thermal history, then cooling to 30 ℃ at a speed of 10 ℃/min, and recording peak values and enthalpy in the cooling process;
the preparation method for the standard test specimen is as follows:
and drying the obtained glass fiber reinforced PBT/PET alloy material particles in a blast drying oven for 4-8 hours at the drying temperature of 100-140 ℃, and molding and preparing a sample by using an injection molding machine at the molding mold temperature of 40-80 ℃.
Table 3 results of performance tests of examples 1 to 4
TABLE 4 comparative examples 1-4 Performance test results
As shown in Table 3, the glass fiber reinforced PBT/PET alloy materials with smooth surfaces, no warpage and stable sizes can be prepared in the embodiments 1, 2, 3 and 4 of the invention, the shrinkage difference between the horizontal direction and the vertical direction of the alloy materials is less than or equal to 0.1%, the alloy materials are more stable in size and are not easy to warp, meanwhile, the glossiness of the alloy materials is improved, and the surface glossiness is as high as 80-86 degrees; as can also be seen from Table 3, the alloy material prepared by the invention has excellent mechanical property and heat resistance, the tensile strength reaches 135-145 MPa, and the notch impact strength is more than or equal to 10.0KJ/m 2 The thermal deformation temperature is more than or equal to 195 ℃, the crystallization temperature is more than or equal to 190.6 ℃, and the crystallization half-peak width is more than or equal to 8.5 ℃.
The upper and lower limit values and interval values of the raw materials and the process parameters related by the invention can realize the product of the invention, and are not listed one by one.
As shown in Table 4, the alloy materials prepared in comparative examples 1, 2, 3 and 4 all have the defects. For example: comparative example 1 has a higher tensile strength, a higher notch impact strength and a higher heat distortion temperature, but the difference between the horizontal shrinkage and the vertical shrinkage is as high as 0.3%, the alloy material has unstable size, poor appearance quality, only 38 degrees of glossiness, rough surface and severe warping, and the half-peak width of the crystal is only 5.9 ℃; the tensile strength and the notch impact strength of the comparative example 2 are relatively low, the difference between the horizontal shrinkage rate and the vertical shrinkage rate is up to 0.17%, the size of the alloy material is unstable, the appearance quality is poor, the glossiness is only 47 degrees, the surface is rough, the warpage is serious, and the half-peak width of the crystal is only 5.7 ℃; comparative example 3, although having good appearance quality and high half-value width of crystal, has relatively low tensile strength and notched impact strengthIs only 6.9KJ/m 2 The heat distortion temperature is only 155 ℃, and the crystallization temperature is only 173.3 ℃; comparative example 4, although having good appearance quality, high notch impact strength and high crystallization half-peak width, also had relatively low tensile strength, a heat distortion temperature of only 172 ℃ and a low crystallization temperature.
By comparing the performance test results of the examples and the comparative examples in tables 3 and 4 and combining the DSC cooling curves of the examples 1, the comparative examples 2, 3 and 4 of the glass fiber reinforced PBT/PET alloy material with a smooth surface and the preparation method thereof shown in figure 1, it can be seen that the crystallization temperature of the alloy material can be reduced and the crystallization time of the alloy material can be increased by adding the PET component (characterized by the crystallization half-peak width, the larger the crystallization half-peak width is, the longer the crystallization time is, see the attached figure), that is, the longer the solidification time of the resin in the process of processing and forming, the macroscopically shown surface gloss of the alloy material is greatly improved, and the surface is smooth and excellent;
however, the addition of the PET component with slower crystallization rate reduces the crystallinity of the whole alloy material, has imperfect crystallization degree, macroscopically shows that the heat distortion temperature and the mechanical property of the alloy material are reduced, and from example 1 and comparative example 3, the heat distortion temperature of the alloy material is reduced to 155 ℃ from 198 ℃, the tensile strength is reduced to 105MPa from 145MPa, and the notch impact strength is reduced to 10.6KJ/m 2 Down to 6.9KJ/m 2 The overall performance of the material is remarkably reduced, and although the comparative example 3 also has good appearance and dimensional stability, the application of the material in some high-requirement fields is limited due to the large reduction of the performance; as can be seen from examples 1 and 3 and comparative examples, after the nucleating agent and the ester exchange inhibitor are added, the crystallization rate and the crystallization capacity of the alloy material are improved and maintained in a proper range, namely, the crystallization capacity is not too strong, so that the surface is rough in the process of processing and forming, and the performance is not greatly attenuated due to the reduction of the crystallization capacity, so that the finally prepared material has balanced aspects, smooth and excellent surface and no warpage, and meets the application in the high-requirement field;
as can be seen from comparative examples 1 and 2, the shrinkage difference between the horizontal direction and the vertical direction of the alloy material is small due to the addition of the glass bead components, namely the alloy material is more stable in size, is not easy to warp, and simultaneously partially improves the glossiness of the alloy material.
In comparison with the example 1 and the comparative examples 3 and 4, due to the addition of the PET component, the crystallization temperature of the comparative examples 3 and 4 is reduced, the crystallization time is prolonged, and the surface appearance of the alloy material is smooth and not rough, but the crystallization time is prolonged [ i.e. the crystallization rate is reduced ] to cause the degree of crystallization of the alloy material to be reduced greatly, macroscopically shows that the thermal deformation temperature of the alloy material is greatly reduced, the tensile strength and the impact strength are reduced, and the application with high requirements cannot be met.
The PET component is added in the examples 1, 2, 3 and 4, but the crystallization temperature and the crystallization time (rate) of the alloy material are regulated and controlled by the nucleating agent and the ester exchange inhibitor, even if the crystallization temperature and the crystallization time (rate) of the alloy material are kept in a proper range, the alloy material with smooth surface and excellent performance (heat distortion temperature, tensile strength and impact strength) is finally obtained, and the application of the alloy material in high-requirement fields is met. As can be seen from comparative examples 1 and 2, the addition of the glass bead components (due to the regular spherical structure, the homogeneity and the larger length-diameter ratio of the glass fibers) makes the difference between the horizontal shrinkage and the vertical shrinkage of the alloy material smaller, i.e. the alloy material has more stable size, is not easy to warp, and also partially improves the glossiness of the alloy material.
Claims (10)
1. The glass fiber reinforced PBT/PET alloy material with smooth surface is characterized in that the sum of the raw material components by mass is 100 percent, and the content of each component is as follows: the heat stabilizer comprises, by weight, 30-60% of PBT, 10-40% of PET, 10-40% of glass fiber, 5-25% of glass beads, 0.1-2% of nucleating agent, 0.1-2% of ester exchange inhibitor, 0.1-2% of lubricating dispersant and 0.1-1% of heat stabilizer.
2. The glass fiber reinforced PBT/PET alloy material with smooth surface as claimed in claim 1, wherein the contents of the components are as follows: the composite material comprises, by weight, 40-49% of PBT, 13-19% of PET, 15-30% of glass fiber, 8-20% of glass beads, 0.4-1.4% of nucleating agent, 0.3-1.3% of ester exchange inhibitor, 0.25-1.0% of lubricating dispersant and 0.3-0.8% of heat stabilizer.
3. The glass fiber reinforced PBT/PET alloy material with smooth surface as claimed in claim 1 or 2, wherein: the PBT is prepared by an ester exchange method or a direct esterification method, and the intrinsic viscosity is 0.75 dL/g-1.2 dL/g; the PET is prepared by a direct esterification method process, and the intrinsic viscosity is 0.6 dL/g-0.9 dL/g.
4. The glass fiber reinforced PBT/PET alloy material with a smooth surface as claimed in claim 1 or 2, wherein: the glass fiber is alkali-free glass fiber treated by a silane coupling agent, and the diameter of a monofilament is 7-13 mu m; the average particle size of the hollow glass beads is 10-50 um, the hollow and solid glass beads with a regular spherical structure are any one or a mixture of more than two, and the surface modifier is any one or a mixture of more than two of a silane coupling agent, a titanate coupling agent and an aluminate coupling agent through surface treatment modification.
5. The glass fiber reinforced PBT/PET alloy material with smooth surface as claimed in claim 4, wherein: the nucleating agent is any one of inorganic nucleating agent and organic macromolecular nucleating agent or a mixture of two or more of the inorganic nucleating agent and the organic macromolecular nucleating agent.
6. The glass fiber reinforced PBT/PET alloy material with smooth surface as claimed in claim 5, wherein: the inorganic nucleating agent is one of talcum powder, montmorillonite and hydrotalcite, and the organic macromolecular nucleating agent is one of ionic polymers.
7. The glass fiber reinforced PBT/PET alloy material with smooth surface as claimed in claim 5, wherein: the ester exchange inhibitor is any one or a mixture of more than two of micromolecular triphenyl phosphite, disodium dihydrogen phosphate and macromolecular ethylene glycidyl acrylate.
8. The glass fiber reinforced PBT/PET alloy material with smooth surface as claimed in claim 5, wherein: the heat stabilizer is any one or a mixture of more than two of phenols and phosphites; the lubricating dispersant is pentaerythritol stearate.
9. A preparation method of a glass fiber reinforced PBT/PET alloy material with a smooth surface is characterized in that the sum of the raw material components by mass is 100 percent, and the content of each component is as follows: PBT 30% -60%, PET 10% -40%, glass fiber 10% -40%, glass beads 5% -25%, nucleating agent 0.1% -2%, ester exchange inhibitor 0.1% -2%, lubricating dispersant 0.1% -2% and heat stabilizer 0.1% -1%; uniformly mixing PBT, PET, glass beads, nucleating agent, ester exchange inhibitor, lubricating dispersant and heat stabilizer in a high-speed mixer according to mass percentage, putting the mixed material into a main feeder of a double-screw extruder, metering and adding glass fiber from a side feeding port, and melting, mixing, extruding and granulating the mixture to obtain the PBT/PET/glass fiber composite material; the mixing rotation speed of the high-speed mixer is 480-550 rad/min, the rotation speed of a main machine of the double-screw extruder is 350-450 rad/min, and the processing temperatures from a feeding port to a machine head are 215-225 ℃, 245-255 ℃ of a first zone, 245-255 ℃ of a second zone, 245-255 ℃ of a third zone, 245-255 ℃ of a fourth zone, 235-245 ℃ of a fifth zone, 225-235 ℃ of a sixth zone, 225-235 ℃ of a seventh zone, 225-235 ℃ of an eighth zone, 225-235 ℃ of a ninth zone and 235-245 ℃ of the machine head; the PBT is prepared by an ester exchange method or a direct esterification method, and the intrinsic viscosity is 0.75 dL/g-1.2 dL/g; the PET is prepared by a direct esterification method, and the intrinsic viscosity is 0.6 dL/g-0.9 dL/g; the glass fiber is alkali-free glass fiber treated by a silane coupling agent, and the diameter of a monofilament is 7-13 mu m; the average particle size of the hollow glass beads is 10-50 um, the hollow and solid glass beads with a regular spherical structure are any one or a mixture of more than two, and the surface modifier is any one or a mixture of more than two of a silane coupling agent, a titanate coupling agent and an aluminate coupling agent; the inorganic nucleating agent is one of talcum powder, montmorillonite and hydrotalcite, and the organic macromolecular nucleating agent is one of ionic polymer; the ester exchange inhibitor is any one or a mixture of more than two of micromolecule triphenyl phosphite, disodium dihydrogen phosphate and macromolecular ethylene glycidyl acrylate; the heat stabilizer is any one or a mixture of more than two of phenols and phosphites; the lubricating dispersant is pentaerythritol stearate.
10. The preparation method of the glass fiber reinforced PBT/PET alloy material with smooth surface according to claim 9, characterized in that the raw materials comprise the following components: the composite material comprises, by weight, 40-49% of PBT, 13-19% of PET, 15-30% of glass fiber, 8-20% of glass beads, 0.4-1.4% of nucleating agent, 0.3-1.3% of ester exchange inhibitor, 0.25-1.0% of lubricating dispersant and 0.3-0.8% of heat stabilizer.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102040808A (en) * | 2010-12-15 | 2011-05-04 | 深圳市富恒塑胶新材料有限公司 | Glass fiber enhanced PET/PBT (Polyethylene Terephthalate)/(Polybutylene Terephthalate) alloy with high glossiness and low warping degree and preparation method thereof |
| CN102532824A (en) * | 2010-12-28 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | Flame-retardant reinforced warping-resistance PBT/PTT (polybutylene terephthalate/polytrimethylene terephthalate) alloy material and preparation method thereof |
| CN106380800A (en) * | 2016-10-08 | 2017-02-08 | 上海加略实业有限公司 | High heat-resistant spraying-free glass fiber reinforced PBT/PET alloy and preparation method thereof |
| CN112759900A (en) * | 2020-12-28 | 2021-05-07 | 苏州旭光聚合物有限公司 | Glass fiber reinforced polybutylene terephthalate composite material and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040808A (en) * | 2010-12-15 | 2011-05-04 | 深圳市富恒塑胶新材料有限公司 | Glass fiber enhanced PET/PBT (Polyethylene Terephthalate)/(Polybutylene Terephthalate) alloy with high glossiness and low warping degree and preparation method thereof |
| CN102532824A (en) * | 2010-12-28 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | Flame-retardant reinforced warping-resistance PBT/PTT (polybutylene terephthalate/polytrimethylene terephthalate) alloy material and preparation method thereof |
| CN106380800A (en) * | 2016-10-08 | 2017-02-08 | 上海加略实业有限公司 | High heat-resistant spraying-free glass fiber reinforced PBT/PET alloy and preparation method thereof |
| CN112759900A (en) * | 2020-12-28 | 2021-05-07 | 苏州旭光聚合物有限公司 | Glass fiber reinforced polybutylene terephthalate composite material and preparation method thereof |
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