CN114621562A - Conductive glass fiber reinforced PBT (polybutylene terephthalate) and preparation method thereof - Google Patents
Conductive glass fiber reinforced PBT (polybutylene terephthalate) and preparation method thereof Download PDFInfo
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- CN114621562A CN114621562A CN202011462804.5A CN202011462804A CN114621562A CN 114621562 A CN114621562 A CN 114621562A CN 202011462804 A CN202011462804 A CN 202011462804A CN 114621562 A CN114621562 A CN 114621562A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/10—Reinforcing macromolecular compounds with loose or coherent fibrous material characterised by the additives used in the polymer mixture
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
- C08J5/08—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials glass fibres
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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- C08K3/041—Carbon nanotubes
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- C08K9/00—Use of pretreated ingredients
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- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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Abstract
The invention discloses a glass fiber reinforced PBT material with a conductive effect and a preparation method thereof, wherein the glass fiber reinforced PBT material comprises the following components in parts by weight: polyethylene terephthalate: 60-65 parts; conductive auxiliary agent: 5-7 parts; antioxidant: 0.1-0.3 part; lubricant: 0.1-0.2 parts; glass fiber: 30 parts of. The material has good conductivity, and can meet the requirements of specific fields on the conductivity of the material.
Description
Technical Field
The invention relates to the field of PBT manufacturing, in particular to a glass fiber reinforced PBT material with a conductive effect.
Background
The common glass fiber reinforced PBT product is easy to generate static electricity in the using process, especially in a dry environment, if the static electricity gathered on the surface of a plastic product cannot be released in time, the static electricity can be released in the contact process, electric shock can be caused, even fire disasters can be caused by formed sparks, and especially in special places such as gas stations, gas filling stations and the like, the damage of the static electricity is more serious. Secondly, the static electricity accumulated in the plastic housing can also affect the failure of the electronic components therein, resulting in the loss of the function thereof. In conclusion, the hazards of static electricity build up severely affect life, production and daily work and even sometimes cause fires and explosions.
Patent applications for conductive PBT materials, publication (publication) numbers: CN201710601982.3 flame-retardant conductive PBT composite material and preparation method thereof, the conductive effect is obtained by compounding stainless steel fiber and conductive carbon black, but the surface resistivity can be as low as 10 at least5Omega cm and a tensile strength of at most 79 MPa. The surface resistance and tensile strength of the composite material do not meet the properties required by many products.
Publication (bulletin) No.: CN 201611155695.6A thermal-oxidative-aging-resistant flame-retardant conductive PBT composite material and a preparation method thereof, the conductive effect is obtained by researching the synergistic effect of brass fiber, carbon fiber and carbon nano tube, but the addition amount of the conductive agent is up to more than 20 parts, and the cost is higher.
Scheme of the invention
The conductive glass fiber reinforced PBT material comprises the following components in parts by weight:
polyethylene terephthalate: 60-65 parts;
conductive auxiliary agent: 5-7 parts;
antioxidant: 0.1-0.3 part;
lubricant: 0.1-0.2 parts;
glass fiber: 30 parts of.
Furthermore, the polyethylene terephthalate (PBT) has the density of 1.30-1.32, the melting point of 220-230 ℃ and the viscosity of 0.86-1.05d 1/g.
Furthermore, the conductive auxiliary agent is carbon nano-tubes.
Furthermore, the antioxidant is one or a mixture of two of organic hindered phenol antioxidants and phosphite antioxidants.
Further, the lubricant is ethylene bis stearamide or montan wax.
Furthermore, the glass fiber is alkali-free chopped glass fiber, the diameter of the glass fiber is 11-13 μm, the length of the glass fiber is 3.0-4.5mm, and the glass fiber are all treated by a coupling agent, and the coupling agent is a silane coupling agent.
Further, the preparation method comprises the following steps:
1) according to the weight ratio of polyethylene terephthalate: 60-65 parts; conductive auxiliary agent: 5-7 parts; antioxidant: 0.1-0.5 part; lubricant: 0.1-2 parts; glass fiber: weighing 30 parts by weight, adding the polyethylene terephthalate, the conductive assistant, the antioxidant and the lubricant into a stirring pot, stirring for 3-5 minutes at the rotating speed of 200-300rpm, and uniformly mixing to obtain a mixed material;
2) the mixed material is added into a double-screw extruder from a main feed, the glass fiber is added from a side feed of the double-screw extruder, the temperature of a charging barrel of the double-screw extruder is controlled to be 200-245 ℃, the rotating speed of a screw is 300-400 rpm, and the content of the glass fiber can be adjusted by adjusting the proportion of the main feed blanking amount and the side feed blanking amount of the double-screw extruder.
The utility model provides a fine reinforcing PBT material of electrically conductive glass, extruder temperature is 1 st section 0 degree centigrade, 2 nd section 200 degrees centigrade, 3 rd section 230 degrees centigrade, 4 th section 250 degrees centigrade, 5 th section 250 degrees centigrade, 6 th section 240 degrees centigrade, 7 th section 235 degrees centigrade, 8 th section 230 degrees centigrade, 9 th section 230 degrees centigrade, 10 th section 230 degrees centigrade, aircraft nose section 235 degrees centigrade.
The invention has the beneficial effects that:
the conductive glass fiber reinforced PBT material has the strength higher than that of a common glass fiber reinforced PBT product in the market, has the conductivity which is not possessed by the common glass fiber reinforced PBT material, and is suitable for the specific field which requires no static electricity or conductivity. Compared with the prior art, the technical scheme has the surface resistivity reaching 102Ω·cm～103Omega cm far higher than CN201710601982.3, flame-retardant conductive PBT composite material and preparation method thereof, 10 of5Omega cm, the tensile strength of the alloy is 135MPa which is much higher than that of the alloy 79MPa。
The carbon nano tube added as the conductive additive is only below 7 units and is far lower than CN201611155695.6, and more than 20 parts of the thermal-oxidative-aging-resistant flame-retardant conductive PBT composite material is added in the preparation method thereof. The raw material is medium-low viscosity PBT resin with the viscosity of 0.86-1.05d1/g, so that the material is endowed with good fluidity and is easy to perform injection molding processing. The glass fiber is alkali-free chopped glass fiber with the monofilament diameter of 11-13 mu m, the high length-diameter ratio of the glass fiber in the material is kept, the surface treated by the coupling agent is firmly combined with the resin, and the physical properties of the material are fully improved.
The co-rotating double-screw extruder is adopted, the motor power is high, the torque is high, the temperature control is accurate, and the transmission force of extrusion and the stable operation of materials are ensured. The vacuumizing system can effectively pump away small molecular substances generated in the system or in the extrusion process, and the stability of the material is ensured.
In conclusion, the conductive glass fiber reinforced PBT material is produced by innovating and selecting raw materials and additives and innovating an extrusion process, and meets the requirements of specific fields.
Detailed Description
Example 1 a conductive glass fiber reinforced PBT and a method of making the same
(1) Weighing 65 parts of PBT, 5 parts of carbon nano tubes, 0.1 part of 1076, 0.2 part of 168, 0.2 part of montan Wax (OP-Wax) and 30 parts of glass fiber ECS 303-3-H;
(2) and (2) feeding a mixture obtained by mixing the components except the glass fiber in the step (1) in a mixture pot with the rotating speed of 300rpm for 5 minutes from a main feeding port of an extruder, adding the glass fiber from a side feeding port, and extruding and granulating according to the process shown in the table 1 to obtain the PBT composite material S1.
Furthermore, the polyethylene terephthalate (PBT) has the density of 1.30-1.32, the melting point of 220-230 ℃ and the viscosity of 0.86-1.05 dl/g.
Example 2
The conductive glass fiber reinforced PBT and the preparation method are
(1) Weighing 64 parts of PBT, 6 parts of carbon nano tubes, 0.05 part of 1076, 0.05 part of 168, 0.15 part of montan Wax (0P-Wax) and 30 parts of glass fiber ECS 303-3-H;
(2) and (2) feeding a mixture obtained by mixing the components except the glass fiber in the step (1) in a mixture pot with the rotating speed of 200rpm for 5 minutes from a main feeding port of an extruder, adding the glass fiber from a side feeding port, and extruding and granulating according to the process shown in the table 1 to obtain the PBT composite material S2.
Furthermore, the polyethylene terephthalate (PBT) has the density of 1.30-1.32, the melting point of 220-230 ℃ and the viscosity of 0.86-1.05 dl/g.
Example 3
The conductive glass fiber reinforced PBT and the preparation method are
(1) Weighing 60 parts of PBT, 7 parts of carbon nano tubes, 0.1 part of 1076, 0.1 part of 168, 0.1 part of ethylene bis stearamide and 30 parts of glass fiber ECS 303-3-H;
(2) and (2) feeding a mixture obtained by mixing the components except the glass fiber in the step (1) in a mixing pot with the rotating speed of 250rpm for 3 minutes from a main feeding port of an extruder, adding the glass fiber from a side feeding port, and extruding and granulating according to the process shown in the table 1 to obtain the PBT composite material S3.
Furthermore, the polyethylene terephthalate (PBT) has the density of 1.30-1.32, the melting point of 220-230 ℃ and the viscosity of 0.86-1.05 dl/g.
Comparative example 1
(1) Weighing 70 parts of PBT, 0.1 part of 1076, 0.2 part of 168, 0.2 part of OP-Wax and 30 parts of glass fiber ECS 303-3-H;
(2) and (2) mixing the components except the glass fiber in the step (1) in a mixing pot with Orpm rotating speed for 5 minutes to obtain a mixture, feeding the mixture from a main feeding port of an extruder, adding the glass fiber from a side feeding port, and extruding and granulating according to the process shown in the table 1 to obtain the PBT composite material C1.
Table 1: extruder production process parameter setting table
The PBT composite materials prepared in the above examples 1-3 and comparative example 1 were molded into specimens by an injection molding machine, and the test data are shown in Table 2.
Table 2: physical Properties and surface resistivities of examples 1-3 and comparative example 1
As can be seen from the data of the physical properties and surface resistivity tests of examples 1-3 and comparative example 1 in Table 2, the tensile strength of the examples is about 20MPa higher than that of the comparative example, the notched Izod impact strength of the examples is about equal to or slightly higher than that of the comparative example, and the surface resistivity of the examples is far lower than that of the comparative example, 1013Omega cm, the requirement of the belt material in specific fields for electric conduction is met.
The above are only examples for illustrating the present invention, and the content thereof does not limit the scope of the present invention, and the design idea, the substitution of different brands of raw materials and the number variation according to the patent are all within the scope of the present patent.
Claims (10)
1. The conductive glass fiber reinforced PBT material is characterized by comprising the following components in parts by weight:
polyethylene terephthalate: 60-65 parts;
conductive auxiliary agent: 5-7 parts;
antioxidant: 0.1-0.3 part;
lubricant: 0.1-0.2 part;
glass fiber: 30 parts of the raw materials.
2. The electrically conductive glass fiber reinforced PBT material of claim 1, wherein the polyethylene terephthalate (PBT) has a density of 1.30-1.32, a melting point of 220-230 ℃, and a viscosity of 0.86-1.05d 1/g.
3. The conductive glass fiber reinforced PBT material of claim 1, wherein the conductive additive is carbon nanotubes.
4. The conductive glass fiber reinforced PBT material of claim 1, wherein the antioxidant is one or a mixture of organic hindered phenol or phosphite antioxidant.
5. The electrically conductive glass fiber reinforced PBT material of claim 1, wherein the lubricant is ethylene bis stearamide or montan wax.
6. The conductive glass fiber reinforced PBT material of claim 1, wherein the glass fiber is alkali-free chopped glass fiber, the fiber diameter is 11 μm-13 μm, and the length is 3.0-4.5 mm.
7. The conductive glass fiber reinforced PBT material of claim 6, wherein the alkali-free chopped glass fibers are treated with a coupling agent, and the coupling agent is a silane coupling agent.
8. The conductive glass fiber reinforced PBT material of claim 1, wherein the preparation method comprises the following steps:
1) according to the weight ratio of polyethylene terephthalate: 60-65 parts; conductive auxiliary agent: 5-7 parts; antioxidant: 0.1-0.5 part; lubricant: 0.1-2 parts; glass fiber: weighing 30 parts by weight, adding the polyethylene glycol terephthalate, the conductive assistant, the antioxidant and the lubricant into a stirring pot, stirring for 3-5 minutes at the rotating speed of 200-300rpm, and uniformly mixing to obtain a mixed material;
2) and adding the mixed material into a double-screw extruder from a main feed, adding glass fiber from a side feed of the double-screw extruder, and extruding to obtain the conductive glass fiber reinforced PBT material.
9. The conductive glass fiber reinforced PBT material as claimed in claim 8, wherein the temperature of the cylinder of the twin-screw extruder in step 2) is controlled to be 200-245 ℃, and the rotation speed of the screw is 300-.
10. The conductive glass fiber reinforced PBT material of claim 8, wherein the extruder temperature is 0 ℃ in the 1 st stage, 200 ℃ in the 2 nd stage, 230 ℃ in the 3 rd stage, 250 ℃ in the 4 th stage, 250 ℃ in the 5 th stage, 240 ℃ in the 6 th stage, 235 ℃ in the 7 th stage, 230 ℃ in the 8 th stage, 230 ℃ in the 9 th stage, 230 ℃ in the 10 th stage, and 235 ℃ in the nose stage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011462804.5A CN114621562A (en) | 2020-12-10 | 2020-12-10 | Conductive glass fiber reinforced PBT (polybutylene terephthalate) and preparation method thereof |
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| CN202011462804.5A CN114621562A (en) | 2020-12-10 | 2020-12-10 | Conductive glass fiber reinforced PBT (polybutylene terephthalate) and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353722A (en) * | 2022-07-22 | 2022-11-18 | 宁波坚锋新材料有限公司 | Glass fiber reinforced PET material and preparation method thereof |
| CN116003985A (en) * | 2023-02-13 | 2023-04-25 | 创合新材料科技江苏有限公司 | Conductive glass fiber reinforced polycarbonate composite material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115580A (en) * | 2010-12-31 | 2011-07-06 | 陶峰 | Manufacturing method of anti-static and electromagnetic shielding polymer sheet |
| CN102532823A (en) * | 2010-12-30 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | Anti-static polybutylene terephthalate (PBT) material with excellent comprehensive performance and preparation method thereof |
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2020
- 2020-12-10 CN CN202011462804.5A patent/CN114621562A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532823A (en) * | 2010-12-30 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | Anti-static polybutylene terephthalate (PBT) material with excellent comprehensive performance and preparation method thereof |
| CN102115580A (en) * | 2010-12-31 | 2011-07-06 | 陶峰 | Manufacturing method of anti-static and electromagnetic shielding polymer sheet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353722A (en) * | 2022-07-22 | 2022-11-18 | 宁波坚锋新材料有限公司 | Glass fiber reinforced PET material and preparation method thereof |
| CN115353722B (en) * | 2022-07-22 | 2024-05-07 | 宁波坚锋新材料有限公司 | Glass fiber reinforced PET material and preparation method thereof |
| CN116003985A (en) * | 2023-02-13 | 2023-04-25 | 创合新材料科技江苏有限公司 | Conductive glass fiber reinforced polycarbonate composite material and preparation method and application thereof |
| CN116003985B (en) * | 2023-02-13 | 2023-09-15 | 创合新材料科技江苏有限公司 | Conductive glass fiber reinforced polycarbonate composite material and preparation method and application thereof |
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