CN111410789A - Low-odor low-VOC glass fiber reinforced polypropylene composite material and preparation method thereof - Google Patents

Low-odor low-VOC glass fiber reinforced polypropylene composite material and preparation method thereof Download PDF

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CN111410789A
CN111410789A CN202010289707.4A CN202010289707A CN111410789A CN 111410789 A CN111410789 A CN 111410789A CN 202010289707 A CN202010289707 A CN 202010289707A CN 111410789 A CN111410789 A CN 111410789A
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low
odor
voc
glass fiber
fiber reinforced
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梁珊
周建刚
姚远
曾庆文
李炜
刘奇
王艺
何勇
谭家顶
杨小祥
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Chongqing Polycomp International Corp
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/06Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
    • C08J5/08Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials glass fibres
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02Characterised 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
    • C08J2323/10Homopolymers or copolymers of propene
    • C08J2323/12Polypropene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2451/00Characterised 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
    • C08J2451/06Characterised 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
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00Use of ingredients characterised by shape
    • C08K7/02Fibres or whiskers
    • C08K7/04Fibres or whiskers inorganic
    • C08K7/14Glass
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00Use of pretreated ingredients

Abstract

The low-odor low-VOC glass fiber reinforced polypropylene composite material and the preparation method thereof comprise the following raw materials in parts by weight: 50-90 parts of PP resin, 10-50 parts of chopped flat glass fiber, 0-1 part of lubricant, 0-4 parts of compatilizer, 0-2 parts of antioxidant and 0-2 parts of black master batch; the low-odor low-VOC chopped flat glass fiber is used for replacing common cylindrical glass fiber, so that the odor and the VOC content of the glass fiber reinforced polypropylene composite material are reduced, the process stability of double-screw extrusion high-glass-fiber-content strand cutting and granulating can be improved, the flowability, the mechanical property and the appearance of a workpiece of the glass fiber reinforced polypropylene composite material are improved, and the warping deformation of a glass fiber reinforced polypropylene composite material product is reduced. Meanwhile, the maleic anhydride grafted PP with low odor and high activity is used as a compatilizer, and the extremely high compatibilization efficiency and high reaction activity group of the compatilizer are fully utilized, so that the odor and VOC (volatile organic compounds) of the glass fiber reinforced PP composite material are further reduced on the premise of ensuring the performance.

Description

Low-odor low-VOC glass fiber reinforced polypropylene composite material and preparation method thereof
Technical Field
The invention belongs to the technical field of modification of high polymer materials, and particularly relates to a low-odor low-VOC glass fiber reinforced polypropylene composite material and a preparation method thereof.
Background
The glass fiber reinforced polypropylene composite material has good mechanical property, processability, weather resistance and size stability, is widely applied to the fields of automobiles, household appliances and the like, and various automobile manufacturers in the world put forward higher requirements on the low-odor and low-VOC (volatile organic compound) performance of automobile interior materials under the feedback of users along with the improvement of living standards of people, particularly the rapid development of automobile industry. In addition, in the preparation of the existing glass fiber reinforced polypropylene composite material, the flowability of glass fibers in resin is limited, and poor flowability of granules causes uneven arrangement of the glass fibers and poor surface quality of a finished piece. Meanwhile, cylindrical glass fibers are highly oriented in resin, so that the shrinkage rate of the prepared glass fiber reinforced polypropylene composite material is large in difference in all directions, and finally, a part of the glass fiber reinforced polypropylene composite material is extremely easy to warp and deform.
Disclosure of Invention
The invention aims to provide a low-odor low-VOC glass fiber reinforced polypropylene composite material and a preparation method thereof, which can overcome the defects that the odor and VOC emission of the existing glass fiber reinforced polypropylene composite material do not reach the standard, can also obviously improve the melt index of glass fiber reinforced polypropylene, improve the surface quality of the glass fiber reinforced polypropylene composite material, ensure that a composite material part is not easy to warp and deform, and meet the new development requirements of automotive interior materials.
The technical scheme of the invention is as follows:
the low-odor low-VOC glass fiber reinforced polypropylene composite material comprises the following raw materials in parts by weight: 50-90 parts of PP resin, 10-50 parts of chopped flat glass fiber, 0-1 part of lubricant, 0-4 parts of compatilizer, 0-2 parts of antioxidant and 0-2 parts of black master batch; the chopped flat glass fibers are flat in section, and the surfaces of the chopped flat glass fibers are coated with low-odor and low-VOC chopped flat glass fibers.
Preferably, the compatilizer is a low-odor high-activity compatilizer formed by grafting a maleic anhydride group and a high-reactivity group on polypropylene, the grafting ratio of the maleic anhydride group and the high-reactivity group is 1.3% -1.6%, and the melt index of the compatilizer is 150g/10min under the test condition of 2.16kg/230 ℃.
Preferably, the PP resin is a hydrogen-modified, medium melt index polypropylene resin, and the PP resin has a melt index of (30-50) g/10min at a test condition of 2.16Kg/230 ℃.
Preferably, the low-odor low-VOC chopped flat glass fiber has a length of 3-6mm and a section width-thickness ratio of (2-10): 1.
preferably, the low-odor low-VOC chopped flat glass fiber has a length of 3-6mm and a section width-thickness ratio of (3-8): 1.
preferably, the PP resin is a PP-HP500P type resin.
Preferably, the lubricant is one or a mixture of any two or a mixture of three of a calcium stearate lubricant, a modified polyolefin wax lubricant and a silicone lubricant, and/or the antioxidant is a hindered phenol antioxidant or a phosphite antioxidant or a mixture of the hindered phenol antioxidant and the phosphite antioxidant, and/or the black master batch is a PP carrier carbon black master batch or a PE carrier carbon black master batch.
A preparation method of a low-odor low-VOC glass fiber reinforced polypropylene composite material comprises the following steps of:
step 1, coating a low-odor and low-VOC impregnating agent on the surface of flat glass fibers to obtain low-odor and low-VOC flat glass fibers, and cutting the low-odor and low-VOC flat glass fibers into specified lengths to form low-odor and low-VOC chopped flat glass fibers, or directly taking the low-odor and low-VOC chopped flat glass fibers coated with the low-odor and low-VOC impregnating agent on the surface;
step 2, uniformly mixing the PP resin, the lubricant, the compatilizer, the antioxidant and the black master batch in a high-speed mixer to obtain a premix;
and 3, adding the premix obtained in the step 2 into a main feeding port of a double-screw extruder with the length-diameter ratio of (30-60):1, simultaneously adding the low-odor and low-VOC chopped flat glass fiber obtained in the step 1 into a side feeding port of the double-screw extruder, carrying out melt extrusion on the premix and the low-odor and low-VOC chopped flat glass fiber by the double-screw extruder, cooling, forming and granulating to obtain the low-odor and low-VOC glass fiber reinforced polypropylene composite material, wherein the processing temperature of each section of the double-screw extruder is controlled at 180 ℃ and 210 ℃, and the vacuum degree is-0.1 MPa.
Preferably, the twin screw extruder has a length to diameter ratio of 48: 1.
Preferably, in step 3, the premix is fed into the twin-screw extruder at a rate of 21 kg/hr for melt-dispersion, while the low-odor low-VOC chopped flat glass fibers are fed at a rate of 9 kg/hr from a side feeding port of the twin-screw extruder through a loss-in-weight balance.
Compared with the prior art, the invention has the advantages that:
according to the low-odor low-VOC glass fiber reinforced polypropylene composite material and the preparation method thereof, common cylindrical glass fibers are replaced by the low-odor low-VOC chopped flat glass fibers, so that the odor and VOC content of the glass fiber reinforced polypropylene composite material are reduced, the process stability of double-screw extrusion high-glass-fiber-content strand-drawing and grain-cutting can be improved, the flowability, the mechanical property and the appearance of a workpiece of the glass fiber reinforced polypropylene composite material are improved, and the warping deformation of a glass fiber reinforced polypropylene composite material product is reduced. Meanwhile, the low-odor high-activity maleic anhydride grafted PP (PP-g-MAH) is used as a compatilizer, and the extremely high compatibilization efficiency and high reaction activity groups of the compatilizer are fully utilized, so that the odor and VOC (volatile organic compounds) of the PP composite material are further reduced on the premise of ensuring the performance. The development requirements of low odor, low VOC, high dimensional stability, high mechanical property and high surface quality of the automotive interior material are met.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to specific examples and comparative examples.
Example 1
The low-odor low-VOC glass fiber reinforced polypropylene composite material 1 comprises the following raw materials:
66.5 kg of PP (polypropylene) resin, model PP-HP 500P;
30 kg of chopped flat glass fiber, the model of which is ECS305K-3-M4, the section of the chopped flat glass fiber is flat, the width-to-thickness ratio of the cross section is 4:1, and the surface of the chopped flat glass fiber is coated with a low-odor and low-VOC impregnating compound;
0.14 kg of polypropylene wax lubricant;
2.8 kilograms of a common compatibilizer, formed by grafting PP with maleic anhydride groups (PP-g-MAH);
0.14 kg of phenolic antioxidant, type Irganox 1010, and 0.14 kg of phosphite antioxidant, type Irganox 168;
0.28 kg of black master batch, the model of which is CABOT-UN 2014.
The preparation method of the low-odor low-VOC glass fiber reinforced polypropylene composite material 1 comprises the steps of preparing raw materials according to the weight,
step 1: confirming whether the chopped flat glass fiber with the model number of ECS305K-3-M4 is low-odor and low-VOC chopped flat glass fiber coated with a low-odor and low-VOC wetting agent, if so, carrying out the next step, and if not, coating the chopped flat glass fiber with the low-odor and low-VOC wetting agent to obtain low-odor and low-VOC chopped flat glass fiber;
step 2: fully and uniformly mixing 66.5 kg of PP (polypropylene) resin with the model of PP-HP500P, 2.8 kg of common compatilizer, 0.14 kg of phenol antioxidant with the model of Irganox 1010, 0.14 kg of phosphite antioxidant with the model of Irganox168, 0.28 kg of black master batch with the model of CABOT-UN2014 and 0.14 kg of polypropylene wax lubricant in a high-speed mixer to obtain premix 1;
and step 3: and (2) feeding the premix 1 obtained in the step (2) from a main feeding port of a double-screw extruder with the length-diameter ratio of 48:1 at the speed of 21 kg/h, simultaneously adding the low-odor low-VOC chopped flat glass fiber obtained in the step (1) into the premix 1 from a side feeding port of the double-screw extruder at the speed of 9 kg/h, and performing melt extrusion on the premix 1 and the low-odor low-VOC chopped flat glass fiber through the double-screw extruder, cooling and molding, and pelletizing to obtain the low-odor low-VOC glass fiber reinforced polypropylene composite material 1 with the glass fiber content of 30%. Wherein the processing temperature of each section of the double-screw extruder is controlled at 210 ℃ at 180 ℃ and the vacuum degree is-0.1 MPa.
Tests show that the low-odor low-VOC glass fiber reinforced polypropylene composite material 1 with the glass fiber content of 30% has the following properties: melt index 14(g/10min), flow direction shrinkage of 0.22%, perpendicular flow direction shrinkage of 0.34%, odor grade 3.5. Namely, the low-odor and low-VOC glass fiber reinforced polypropylene composite material 1 has the advantages of low odor and VOC, high fluidity, high mechanical property and high dimensional stability. Meets the new development requirements of the automotive interior material.
Example 2
The low-odor and low-VOC glass fiber reinforced polypropylene composite material 2 comprises the following raw materials:
67.2 kg of PP (polypropylene) resin, model PP-HP 500P;
30 kg of chopped flat glass fiber, the model of which is ECS305K-3-M4, the section of the chopped flat glass fiber is flat, the width-to-thickness ratio of the cross section is 4:1, and the surface of the chopped flat glass fiber is coated with a low-odor and low-VOC impregnating compound;
0.14 kg of polypropylene wax lubricant;
2.1 kg of a low-odor high-activity oligomer compatilizer, wherein the high-activity oligomer compatilizer is formed by grafting PP (PP-g-MAH) with maleic anhydride groups and high-reactivity groups, the grafting rate of the maleic anhydride groups and the grafting rate of the high-reactivity groups are 1.3-1.6%, and the melt index is 150g/10min (230 ℃, 2.16 kg);
0.14 kg of phenolic antioxidant, type Irganox 1010, and 0.14 kg of phosphite antioxidant, type Irganox 168;
0.28 kg of black master batch, the model of which is CABOT-UN 2014.
The preparation method of the low-odor low-VOC glass fiber reinforced polypropylene composite material 2 comprises the steps of preparing raw materials according to the weight,
step 1: confirming whether the chopped flat glass fiber with the model number of ECS305K-3-M4 is low-odor and low-VOC chopped flat glass fiber coated with a low-odor and low-VOC wetting agent, if so, carrying out the next step, and if not, coating the chopped flat glass fiber with the low-odor and low-VOC wetting agent to obtain low-odor and low-VOC chopped flat glass fiber;
step 2: 67.2 kg of PP (polypropylene) resin with the model of PP-HP500P, 2.1 kg of low-odor high-activity oligomer compatilizer, 0.14 kg of phenol antioxidant with the model of Irganox 1010, 0.14 kg of phosphite antioxidant with the model of Irganox168, 0.28 kg of black master batch with the model of CABOT-UN2014 and 0.14 kg of polypropylene wax lubricant are fully and uniformly mixed in a high-speed mixer to obtain premix 2;
and step 3: and (2) feeding the premix 2 obtained in the step (2) from a main feeding port of a double-screw extruder with the length-diameter ratio of 48:1 at the speed of 21 kg/h, simultaneously adding the low-odor low-VOC chopped flat glass fiber obtained in the step (1) into the premix 2 from a side feeding port of the double-screw extruder at the speed of 9 kg/h, and after the premix 2 and the low-odor low-VOC chopped flat glass fiber are melted and extruded by the double-screw extruder, cooling and molding the mixture, and pelletizing the mixture to obtain the low-odor low-VOC glass fiber reinforced polypropylene composite material 2 with the glass fiber content of 30%. Wherein the processing temperature of each section of the double-screw extruder is controlled at 210 ℃ at 180 ℃ and the vacuum degree is-0.1 MPa.
Tests prove that the low-odor low-VOC glass fiber reinforced polypropylene composite material 2 with the glass fiber content of 30 percent has the following properties: the melt index was 15(g/10min), the shrinkage in the flow direction was 0.2%, the shrinkage in the perpendicular flow direction was 0.3%, and the odor rating was 3. Namely, the low-odor and low-VOC glass fiber reinforced polypropylene composite material 1 has the advantages of low odor and VOC, high fluidity, high mechanical property and high dimensional stability. Meets the new development requirements of the automotive interior material.
Comparative example
Taking the following raw materials:
66.5 kg of PP (polypropylene) resin, model PP-HP 500P;
30 kg of common cylindrical glass fiber with the model of ECS 305K-3-K;
0.14 kg of polypropylene wax lubricant;
2.8 kilograms of a common compatibilizer, formed by grafting PP with maleic anhydride groups (PP-g-MAH);
0.14 kg of phenolic antioxidant, type Irganox 1010, and 0.14 kg of phosphite antioxidant, type Irganox 168;
0.28 kg of black master batch, the model of which is CABOT-UN 2014.
A glass fiber reinforced polypropylene composite material of a comparative example was prepared in the same manner as in step 2 and step 3 of example 1: fully and uniformly mixing 66.5 kg of PP (polypropylene) resin with the model of PP-HP500P, 2.8 kg of common compatilizer, 0.14 kg of phenol antioxidant with the model of Irganox 1010, 0.14 kg of phosphite antioxidant with the model of Irganox168, 0.28 kg of black master batch with the model of CABOT-UN2014 and 0.14 kg of polypropylene wax lubricant in a high-speed mixer to obtain a comparative premix;
and (2) feeding the comparative premix from a main feeding port of a double-screw extruder with the length-diameter ratio of 48:1 at the speed of 21 kg/h, simultaneously adding the common cylindrical glass fiber into the comparative premix from a side feeding port of the double-screw extruder at the speed of 9 kg/h, performing melt extrusion by the double-screw extruder, cooling and molding, and pelletizing to obtain the glass fiber comparative reinforced polypropylene composite material with the glass fiber content of 30%. Wherein the processing temperature of each section of the double-screw extruder is controlled at 210 ℃ at 180 ℃ and the vacuum degree is-0.1 MPa.
Tests show that the glass fiber reinforced polypropylene composite material with the glass fiber content of 30 percent has the following properties: melt index 9(g/10min), flow direction shrinkage of 0.12%, perpendicular flow direction shrinkage of 0.44%, odor grade 4.
The test results of example 1, example 2 and comparative example are shown in the following table
Analysis shows that the low-odor low-VOC chopped flat glass fiber is adopted to replace common cylindrical glass fiber, so that the odor and the VOC content of the glass fiber reinforced polypropylene composite material are reduced, the process stability of double-screw extrusion high-glass-fiber-content strand-pulling and grain-cutting can be improved, the flowability, the mechanical property and the appearance of a workpiece of the glass fiber reinforced polypropylene composite material are improved, and the warping deformation of a glass fiber reinforced polypropylene composite material product is reduced. Meanwhile, the low-odor high-activity maleic anhydride group and the high-reaction-activity group grafted PP (polypropylene) are used as compatilizers, the extremely high compatibilization efficiency and the high-reaction-activity group are fully utilized, and the odor of the low-odor low-VOC glass fiber reinforced PP composite material and the emission of Volatile Organic Compounds (VOC) are further reduced on the premise of ensuring the performance.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. The low-odor low-VOC glass fiber reinforced polypropylene composite material is characterized by comprising the following raw materials in parts by weight: 50-90 parts of PP resin, 10-50 parts of chopped flat glass fiber, 0-1 part of lubricant, 0-4 parts of compatilizer, 0-2 parts of antioxidant and 0-2 parts of black master batch; the chopped flat glass fibers are flat in section, and the surfaces of the chopped flat glass fibers are coated with low-odor and low-VOC chopped flat glass fibers.
2. The low-odor and low-VOC glass fiber reinforced polypropylene composite material as claimed in claim 1, wherein the compatilizer is a low-odor and high-activity compatilizer formed by grafting maleic anhydride groups and high-reactivity groups onto polypropylene, the grafting ratio of the maleic anhydride groups and the grafting ratio of the high-reactivity groups are 1.3% -1.6%, and the compatilizer has a melt index of 150g/10min under a test condition of 2.16Kg/230 ℃.
3. The low odor, low VOC glass fiber reinforced polypropylene composite of claim 1 or 2, wherein the PP resin is a hydrogen-modified polymeric, medium melt index polypropylene resin having a melt index of (30-50) g/10min at a test condition of 2.16Kg/230 ℃.
4. The low odor and low VOC glass fiber reinforced polypropylene composite of claim 3, wherein said low odor and low VOC chopped flat glass fibers have a length of 3-6mm and a cross-sectional width to thickness ratio of (2-10): 1.
5. the low-odor and low-VOC glass fiber reinforced polypropylene composite material according to claim 4, wherein the low-odor and low-VOC chopped flat glass fiber has a length of 3-6mm and a cross-sectional width-to-thickness ratio of (3-8): 1.
6. the low odor, low VOC glass fiber reinforced polypropylene composite of claim 1, wherein the PP resin is PP-HP500P type resin.
7. The low-odor and low-VOC glass fiber reinforced polypropylene composite material as claimed in claim 1, wherein the lubricant is one or a mixture of any two or a mixture of three of calcium stearate lubricant, modified polyolefin wax lubricant and silicone lubricant, and/or the antioxidant is hindered phenol antioxidant or phosphite antioxidant or a mixture of both, and/or the black master batch is PP carrier carbon black master batch or PE carrier carbon black master batch.
8. A preparation method of a low-odor low-VOC glass fiber reinforced polypropylene composite material, which is characterized in that raw materials are prepared according to the parts by weight of one of claims 1 to 7,
step 1, coating a low-odor and low-VOC impregnating agent on the surface of flat glass fibers to obtain low-odor and low-VOC flat glass fibers, and cutting the low-odor and low-VOC flat glass fibers into specified lengths to form low-odor and low-VOC chopped flat glass fibers, or directly taking the low-odor and low-VOC chopped flat glass fibers coated with the low-odor and low-VOC impregnating agent on the surface;
step 2, uniformly mixing the PP resin, the lubricant, the compatilizer, the antioxidant and the black master batch in a high-speed mixer to obtain a premix;
and 3, adding the premix obtained in the step 2 into a main feeding port of a double-screw extruder with the length-diameter ratio of (30-60):1, simultaneously adding the low-odor and low-VOC chopped flat glass fiber obtained in the step 1 into a side feeding port of the double-screw extruder, carrying out melt extrusion on the premix and the low-odor and low-VOC chopped flat glass fiber by the double-screw extruder, cooling, forming and granulating to obtain the low-odor and low-VOC glass fiber reinforced polypropylene composite material, wherein the processing temperature of each section of the double-screw extruder is controlled at 180 ℃ and 210 ℃, and the vacuum degree is-0.1 MPa.
9. The method for preparing the low-odor and low-VOC glass fiber reinforced polypropylene composite material as claimed in claim 8, wherein the length-diameter ratio of the twin-screw extruder is 48: 1.
10. The method for preparing the low-odor and low-VOC glass fiber reinforced polypropylene composite material according to claim 8 or 9, wherein in the step 3, the premix is conveyed to the twin-screw extruder at a rate of 21 kg/h for melt-dispersion, and simultaneously, the low-odor and low-VOC chopped flat glass fibers are added from a side feeding port of the twin-screw extruder at a rate of 9 kg/h through a weight loss scale.
CN202010289707.4A 2020-04-14 2020-04-14 Low-odor low-VOC glass fiber reinforced polypropylene composite material and preparation method thereof Pending CN111410789A (en)

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Publication number Priority date Publication date Assignee Title
CN111808365A (en) * 2020-07-28 2020-10-23 横店集团得邦工程塑料有限公司 Flat glass fiber reinforced flame-retardant PP (polypropylene) composite material and preparation method thereof
CN112552590A (en) * 2020-12-09 2021-03-26 上海普利特复合材料股份有限公司 Talcum powder/glass fiber modified polypropylene composite material for gas-assisted molding and preparation method thereof
CN113444268A (en) * 2021-07-12 2021-09-28 横店集团得邦工程塑料有限公司 High-performance reinforced PP (polypropylene) material for automobile fan and preparation method thereof
CN113444268B (en) * 2021-07-12 2022-06-14 横店集团得邦工程塑料有限公司 High-performance reinforced PP (polypropylene) material for automobile fan and preparation method thereof

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