CN108164821B - Long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC (volatile organic compounds) and preparation method thereof - Google Patents
Long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC (volatile organic compounds) and preparation method thereof Download PDFInfo
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- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C08K5/00—Use of organic ingredients
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- C08K7/14—Glass
Abstract
The invention discloses a long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC and a preparation method thereof, and the composite material comprises the following components: 30-60% by mass of long glass fibers and 70-40% by mass of polypropylene modified resin, wherein the long glass fibers and the polypropylene modified resin are arranged in a manner of being parallel to the length of the particles; the polypropylene modified resin is prepared by modifying commercial polypropylene resin in the market through a double-screw extruder; the invention comprises the following steps: the processing windows of extrusion and injection molding are increased by adding the polypropylene with low melting point, so that the polypropylene resin can better infiltrate the glass fiber; thereby realizing good apparent performance of the injection molding part, no glass fiber is exposed, no warpage is caused, and the injection molding part is easy to process; the method avoids the application of the flow modifier in the long glass fiber reinforced material, can effectively reduce VOC, and the product of the invention has good mechanical property and good application in the aspects of instrument panel framework, front end framework, automobile tail door and the like.
Description
Technical Field
The invention relates to a polypropylene composite material, in particular to a long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC and a manufacturing method thereof.
Background
With the rapid development of the automobile industry, the light weight of automobiles is more and more concerned by automobile enterprises and consumers, the light weight of automobiles is realized, in addition to the design of optimizing structures and processes, the material selection of automobiles is also a very important aspect, and the plastic replacement of steel is the key point of the research on the light weight of automobiles.
The long glass fiber reinforced polypropylene material has the characteristics of good dimensional stability, excellent fatigue resistance, lower creep property, excellent mechanical property, lower density and the like, has durability and reliability required by being used as a structural part, can be used as the structural part on an automobile instead of metal, has the density far lower than that of engineering plastics such as metal, polyamide and the like, can greatly reduce the weight of parts and realize the light weight of the automobile, and is widely applied to the parts such as an automobile tail door, a front end frame, an accelerator pedal, a rearview mirror bracket, a skylight drainage channel, an instrument panel framework and the like.
The production method of the long glass fiber reinforced polypropylene material mainly comprises an impregnation method, a composite fiber method and a direct injection molding method, wherein the direct injection molding method has a simple production process, but has high requirements on equipment, and key technologies need to be perfected; the composite fiber method has high process requirement, large equipment investment and higher production cost, and cannot be popularized on a large scale; the melting impregnation method has the advantages of simple equipment, high production efficiency and low cost, and is the most common method for producing the long glass fiber reinforced polypropylene material at present.
The infiltration quality of the long glass fiber reinforced polypropylene material produced by a melting impregnation method plays a decisive role in the mechanical property of the long glass fiber reinforced polypropylene material, the infiltration quality is directly related to the production process, equipment and material formula, on the material formula, the flow rate and crystallization temperature of a melt and the interface bonding force of the surface of the melt and glass fiber have direct influence on the infiltration quality, usually, the fluidity is high, the crystallization temperature is low, and the infiltration quality has positive effect, the infiltration effect is better, the apparent quality of the product can be improved, the processing temperature is reduced, and the emission performance of odor, VOC and the like is positively influenced, but the fluidity of polypropylene is generally improved by adopting a flow modifier or a high-fluidity PP raw material in the current production process, the flow modifier is accompanied with the problem of chain breakage in the production process, the molecular weight is reduced, and simultaneously, the mechanical property and the emission performance are accompanied with deterioration, and the breakage of the molecular chains in the production process is an uncontrollable process, which causes the deterioration of the production stability among batches and can not meet the increasingly severe requirements of the mechanical property and the emission property of the long glass fiber material in the automobile industry. The high-fluidity polypropylene raw material has higher price and smaller selection space, and once the appearance quality is poorer in the molding process, the appearance quality is difficult to improve through the formula design, the dependence on the raw material is higher, and the cost control and the formula design are not facilitated.
Disclosure of Invention
The invention provides the long glass fiber reinforced polypropylene composite material with simple preparation process, excellent apparent quality, excellent mechanical property and low VOC, so as to overcome the influence of polypropylene on the mechanical property and emission property while improving the glass fiber infiltration quality in the prior art, effectively improve the apparent quality of injection molding parts, prepare the long glass fiber reinforced polypropylene composite material with high apparent quality, low VOC and excellent comprehensive property, and meet the technical performance requirement of automobile interior parts.
Another object of the present invention is to provide the above long glass fiber reinforced polypropylene composite material with high flowability, good appearance properties and low VOC.
The purpose of the invention is realized as follows:
a long glass fiber reinforced polypropylene composite material with high fluidity, high apparent performance and low VOC (volatile organic compounds) comprises 30-60% by mass of long glass fibers and 70-40% by mass of polypropylene modified resin, wherein the long glass fibers are arranged in a mode of being parallel to the length of particles;
the polypropylene modified resin is prepared by modifying commercial polypropylene resin on the market through a double-screw extruder according to the following raw materials in percentage by weight:
in the modified polypropylene resin system, the modified polypropylene resin is prepared by mixing the components,
the melt index of the polypropylene resin is 10-60 g/10 min.
The melting point of the PP L-Modu is 80 ℃, the relative molecular mass is 75000, and the melting index is 390g/10min (the test condition is 230 ℃/2.16 kg).
The maleic anhydride grafted polypropylene has the function of increasing the compatibility of the glass fiber and the polypropylene.
The antioxidant 1010, the DSTP and the antioxidant 619F have the functions of increasing the stability of the polypropylene in the processing process and the high-temperature environment, and the function of the CaST is to increase the dispersion of the auxiliary agent in the polypropylene.
The assistant-flow modifier Luperox F40 reduces the molecular weight of polypropylene by the action of fracture to improve the fluidity of the polypropylene.
The preparation method of the long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC comprises the following steps:
(1) preparing polypropylene modified resin: uniformly mixing polypropylene, PP L-Modu, maleic anhydride grafted PP and various auxiliaries according to a ratio by using a high-speed stirrer, and adding the mixture into an extruder through a main feeding port of the extruder; the extrusion processing temperature is 140-260 ℃, and the rotating speed of the main machine is 200-400 rpm.
(2) Preparing a long glass fiber reinforced polypropylene material: and (3) impregnating the continuous long glass fiber in the molten polypropylene modified resin melt in an infiltration mold cavity, wherein the impregnation processing temperature is 240-280 ℃, and preparing the long glass fiber reinforced polypropylene material by adopting a pultrusion process.
And the compound enters an impregnating machine head from an extruder to impregnate the drawn continuous glass fiber, and then the continuous glass fiber is cooled and cut into long glass fiber reinforced polypropylene material particles with the length of 8-20 mm by a water tank. .
Compared with the prior art, the invention has the following beneficial effects: the production process does not need to use a flow modifier or high-fluidity polypropylene resin, simplifies the production process, can realize the full infiltration of polypropylene on glass fibers by utilizing the characteristics of high fluidity and low crystallization temperature of PP L-Modu, is easy to process, improves the mechanical property and the apparent property of the composite material, can obviously reduce the production temperature, and obtains the long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC.
Detailed Description
The present invention will be further illustrated by the following examples and comparative examples, but the present invention should not be limited to the contents specifically illustrated in the following experimental examples without departing from the gist of the present invention.
The raw materials used in the examples were as follows:
polypropylene resin 1 (PP-l): melt index 10, test conditions 230 ℃ 2.16 kg;
polypropylene resin 2 (PP-2): melt index 60, test conditions 230 ℃ 2.16 kg;
PP L-Modu: the melting index is 390g/10min, and the test condition is 230 ℃ and 2.16 kg;
a continuous glass fiber; PPG company EC I7-4588;
maleic anhydride grafted PP: MAH-g-PP H9522, commercially available;
stabilizer-antioxidant 1010: hindered phenolic antioxidants, CIBA, switzerland;
stabilizer-antioxidant DSTP: beta, beta' -thiodipropionic acid distearate, commercially available;
stabilizer-antioxidant 619F: phosphite antioxidants, commercially available;
auxiliary agent-calcium stearate, CaST, lubricant, commercially available;
adjuvant-flow modifier Luperox F40, flow modifier, commercially available.
The product performance testing method comprises the following steps:
melt mass flow index (melt index): the test was carried out according to ISO 1133 at 230 ℃ under a load of 2.16 kg.
Density: according to ISO 1183 method, spline size: 10 x 4 mm.
Tensile property: according to ISO 527 method, spline size: 179 × 10 × 4mm, drawing speed 5 mm/min.
Bending property: according to ISO 178 method, spline size: 80 x 10 x 4mm, test speed 2 mm/min.
Notched impact strength: according to ISO 179 method, spline size: 80 x 10 x 4 mm.
Total carbon TVOC test: and testing by GC-MS according to the PV3341 standard, wherein the test value is not more than 50 mu gC/g, and the product is qualified.
And (3) odor test: according to the PV3900 standard, a sample mass of 50g was taken, and the test conditions were 80 ℃ for 2 h.
Apparent mass: panel size according to visual appearance assessment: 355 x 100 x 3.2 mm.
Example 1
84kg of polypropylene resin PP-1, PP L-Modu10kg, MAH-g-PP H95225 kg, stabilizer-antioxidant 1010300 g, stabilizer-antioxidant DSTP 300g, stabilizer-antioxidant 619F200g and auxiliary agent calcium stearate CaST 200g are uniformly mixed by a high-speed stirrer by using a TE-35 (length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added through a main feeding port of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage content of 30% and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare standard mechanical test samples, and the test results are shown in Table 1.
Example 2
84kg of polypropylene resin PP-1, PP L-Modu10kg, MAH-g-PP H95225 kg, stabilizer-antioxidant 1010300 g, stabilizer-antioxidant DSTP 300g, stabilizer-antioxidant 619F200g and auxiliary agent calcium stearate CaST 200g are uniformly mixed by a high-speed stirrer by using a TE-35 (length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added through a main feeding port of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage content of 40% and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare a standard mechanical test sample, and the test result is shown in Table 1.
Example 3
84kg of polypropylene resin PP-1, PP L-Modu10kg, MAH-g-PP H95225 kg, stabilizer-antioxidant 1010300 g, stabilizer-antioxidant DSTP 300g, stabilizer-antioxidant 619F200g and auxiliary agent calcium stearate CaST 200g are uniformly mixed by a high-speed stirrer by using a TE-35 (length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added through a main feeding port of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage content of 50 percent and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare standard mechanical test samples, and the test results are shown in Table 1.
Example 4
84kg of polypropylene resin PP-1, PP L-Modu10kg, MAH-g-PP H95225 kg, stabilizer-antioxidant 1010300 g, stabilizer-antioxidant DSTP 300g, stabilizer-antioxidant 619F200g and auxiliary agent calcium stearate CaST 200g are uniformly mixed by a high-speed stirrer by using a TE-35 (length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added by a main feed of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage of 60% and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare a standard mechanical test sample, and the test result is shown in Table 1.
Example 5
84kg of polypropylene resin PP-2, PP L-Modu10kg, MAH-g-PP H95225 kg, stabilizer-antioxidant 1010300 g, stabilizer-antioxidant DSTP 300g, stabilizer-antioxidant 619F200g and auxiliary agent calcium stearate CaST 200g are uniformly mixed by a high-speed stirrer by using a TE-35 (length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added by a main feed of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage content of 50 percent and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare standard mechanical test samples, and the test results are shown in Table 1.
Example 6
84kg of polypropylene resin PP-2, PP L-Modu10kg, MAH-g-PP H95225 kg, stabilizer-antioxidant 1010300 g, stabilizer-antioxidant DSTP 300g, stabilizer-antioxidant 619F200g and auxiliary agent calcium stearate CaST 200g are uniformly mixed by a high-speed stirrer by using a TE-35 (length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added by a main feed of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage of 60% and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare a standard mechanical test sample, and the test result is shown in Table 1.
Comparative example 1
94kg of polypropylene resin PP-1, MAH-g-PPH 95225 kg, 1010300 g of stabilizer-antioxidant, 300g of stabilizer-antioxidant DSTP, 619F200g stabilizer-antioxidant and 200g of assistant calcium stearate CaST are uniformly mixed by a high-speed stirrer by using a TE-35 (length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added by the main feed of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage content of 50 percent and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare standard mechanical test samples, and the test results are shown in Table 1.
Comparative example 2
94kg of polypropylene resin PP-2, MAH-g-PPH 95225 kg, 1010300 g of stabilizer-antioxidant, 300g of stabilizer-antioxidant DSTP, 619F200g stabilizer-antioxidant and 200g of assistant calcium stearate CaST are uniformly mixed by a high-speed stirrer by using a TE-35 (length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added by the main feed of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage content of 50 percent and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare standard mechanical test samples, and the test results are shown in Table 1.
Comparative example 3
93.5kg of polypropylene resin PP-2, MAH-g-PPH 95225 kg, a stabilizer-antioxidant 1010300 g, a stabilizer-antioxidant DSTP 300g, a stabilizer-antioxidant 619F200g, an auxiliary agent calcium stearate CaST 200g and an auxiliary agent flow modifier Luperox F40500 g are uniformly mixed by a high-speed stirrer by using a TE-35 (the length-diameter ratio L/D is 48) double-screw extruder, and then the mixture is added by a main feed of the extruder. The processing temperature is respectively as follows: 140 ℃, 180 ℃, 210 ℃, 225 ℃, 245 ℃, 245 ℃, 260 ℃, 260 ℃ and the main machine rotating speed is 350 rpm.
The modified polypropylene resin and the continuous glass fiber which are subjected to melting reaction by the extruder are subjected to pultrusion process to prepare the long glass fiber reinforced polypropylene composite material, the temperature of an impregnation die is 245 ℃, the composite material passes through an impregnation machine head and then is cooled and cut into particles to prepare the long glass fiber reinforced PP particle material with the fiber weight percentage of 60% and the length of the long glass fiber reinforced PP particle material being the same as the length of the resin particle material, an injection molding machine is adopted to prepare a standard mechanical test sample, and the test result is shown in Table 1.
Table 1: and (5) performance test results.
As can be seen from the above table, when commercial polypropylene is directly used as a base material to prepare the long glass fiber reinforced polypropylene composite material, the mechanical properties are poor due to the poor flowability of polypropylene and the inability to fully infiltrate the glass fibers (comparative example 1). When the fluidity of polypropylene is improved by adopting the flow modifier, the polypropylene is broken in the processing process of the flow modifier, so that VOC and odor are poor (comparative example 3), the glass fiber can be fully infiltrated by adding the PP L-Modu with high fluidity and low melting point, so that excellent mechanical property and diffusion property are obtained, and the apparent quality of an injection molding part can be improved by utilizing the characteristic of low melting point.
The invention prepares the modified polypropylene with high melt index and low VOC by modifying the commercialized polypropylene, and takes the modified material as a matrix to prepare the long glass fiber reinforced polypropylene material by adopting a melt impregnation method, compared with the prior art, the invention has the following beneficial effects: the high-fluidity polypropylene resin does not need to be produced or purchased in advance, the production process is simplified, the obtained long glass fiber reinforced polypropylene material has good mechanical property and diffusion property, and good appearance performance of the product is realized by utilizing the characteristic of low crystallization temperature of the low-melting-point PP L-Modu.
The long glass fiber reinforced polypropylene composite material obtained by the invention can be widely applied to the aspects of automobile tail doors, instrument panel frameworks, front end frameworks and the like.
Claims (2)
1. A long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC is characterized in that: according to the mass percentage, the glass fiber reinforced polypropylene composite material comprises 30-60% of long glass fibers arranged in a mode of being parallel to the length of particles and 70-40% of polypropylene modified resin;
the polypropylene modified resin is prepared by modifying commercial polypropylene resin on the market through a double-screw extruder according to the following raw materials in percentage by weight:
72.5-89.8% of polypropylene resin;
PP L-Modu 5～15％；
5-10% of maleic anhydride grafted PP;
10100.2-0.5% of stabilizer-antioxidant;
0.5-0.8% of stabilizer-antioxidant DSTP;
0.1-0.3% of stabilizer-antioxidant 619F;
0.1-0.3% of assistant calcium stearate (CaST);
assistant-flow modifier Luperox F400.3-0.6%;
the melting point of the PP L-Modu is 80 ℃, the relative molecular mass is 75000, and the melting index is 390g/10 min;
the preparation method of the long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC comprises the following steps:
(1) preparing polypropylene modified resin: uniformly mixing polypropylene, PP L-Modu, maleic anhydride grafted PP and various auxiliaries according to a ratio by using a high-speed stirrer, and adding the mixture into an extruder through a main feeding port of the extruder; the extrusion processing temperature is 140-260 ℃, and the rotating speed of a main machine is 200-400 rpm;
(2) preparing a long glass fiber reinforced polypropylene material: impregnating continuous long glass fibers in a molten polypropylene modified resin melt in an impregnation die cavity, wherein the impregnation processing temperature is 240-280 ℃, and preparing a long glass fiber reinforced polypropylene material by adopting a pultrusion process;
and the compound enters an impregnating machine head from an extruder to impregnate the drawn continuous glass fiber, and then the continuous glass fiber is cooled and cut into long glass fiber reinforced polypropylene material particles with the length of 8-20 mm by a water tank.
2. The high flow, high appearance, low VOC long glass fiber reinforced polypropylene composite according to claim 1, wherein: the melt index of the polypropylene resin is 10-60 g/10 min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447886.4A CN108164821B (en) | 2017-12-27 | 2017-12-27 | Long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC (volatile organic compounds) and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447886.4A CN108164821B (en) | 2017-12-27 | 2017-12-27 | Long glass fiber reinforced polypropylene composite material with high fluidity, high apparent property and low VOC (volatile organic compounds) and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108164821A CN108164821A (en) | 2018-06-15 |
| CN108164821B true CN108164821B (en) | 2020-09-25 |
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| CN109679210A (en) * | 2018-12-25 | 2019-04-26 | 浙江普利特新材料有限公司 | It is a kind of to adorn apperance performance, high-performance, the low preparation method for distributing polypropylene material for automobile interior exterior |
| CN109749241A (en) * | 2018-12-28 | 2019-05-14 | 浙江普利特新材料有限公司 | Low smell Long Glass Fiber Reinforced PP Composite of a kind of good degree of impregnation and preparation method thereof |
| CN109749242A (en) * | 2018-12-28 | 2019-05-14 | 浙江普利特新材料有限公司 | A kind of long glass fiber-reinforced polypropylene materials for automobile interiors of low TVOC and preparation method thereof |
| CN111087698B (en) * | 2019-12-31 | 2022-05-27 | 上海普利特复合材料股份有限公司 | Long fiber reinforced polypropylene composite material for improving floating fiber and high surface finish degree and preparation method thereof |
| CN111138758B (en) * | 2019-12-31 | 2022-06-28 | 上海普利特复合材料股份有限公司 | Short fiber reinforced polypropylene composite material for improving floating fiber and high surface finish degree and preparation method thereof |
| CN114773728B (en) * | 2022-04-13 | 2023-07-11 | 金发科技(印度)有限公司 | Polypropylene composition and preparation method and application thereof |
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