CN113512213A - Preparation method of long glass fiber reinforced polypropylene wood-plastic composite material for automotive interior - Google Patents
Preparation method of long glass fiber reinforced polypropylene wood-plastic composite material for automotive interior Download PDFInfo
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- CN113512213A CN113512213A CN202110551011.9A CN202110551011A CN113512213A CN 113512213 A CN113512213 A CN 113512213A CN 202110551011 A CN202110551011 A CN 202110551011A CN 113512213 A CN113512213 A CN 113512213A
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- -1 polypropylene Polymers 0.000 title claims abstract description 74
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 73
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 73
- 239000000463 material Substances 0.000 title claims abstract description 71
- 239000003365 glass fiber Substances 0.000 title claims abstract description 65
- 229920001587 Wood-plastic composite Polymers 0.000 title claims abstract description 35
- 239000011155 wood-plastic composite Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002023 wood Substances 0.000 claims abstract description 51
- 239000011265 semifinished product Substances 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 35
- 239000002131 composite material Substances 0.000 claims abstract description 31
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 23
- 239000000314 lubricant Substances 0.000 claims abstract description 17
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 10
- 238000007605 air drying Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 239000012768 molten material Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 235000018185 Betula X alpestris Nutrition 0.000 claims description 2
- 235000018212 Betula X uliginosa Nutrition 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005054 agglomeration Methods 0.000 claims 1
- 230000002776 aggregation Effects 0.000 claims 1
- 239000007822 coupling agent Substances 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005034 decoration Methods 0.000 abstract description 2
- 239000012815 thermoplastic material Substances 0.000 abstract description 2
- 235000013312 flour Nutrition 0.000 description 15
- 102200017650 rs28383586 Human genes 0.000 description 10
- 235000013339 cereals Nutrition 0.000 description 8
- 238000007598 dipping method Methods 0.000 description 7
- 239000000155 melt Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 229920001169 thermoplastic Polymers 0.000 description 4
- 229920006351 engineering plastic Polymers 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical group [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229920001910 maleic anhydride grafted polyolefin Polymers 0.000 description 1
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 150000008301 phosphite esters Chemical group 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
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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
- C08J5/06—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- 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
- 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
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- 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
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
Abstract
The invention discloses a preparation method of a long glass fiber reinforced polypropylene wood-plastic composite material for automotive interior decoration. The composite material mainly comprises two parts: a polypropylene/wood powder composite material semi-finished product and a long glass fiber reinforced polypropylene material semi-finished product. The two semi-finished products are uniformly mixed according to a certain proportion, and finally the wood-plastic composite material with certain glass fiber and wood powder contents is obtained. Wherein: the polypropylene/wood powder composite material semi-finished product system comprises 50% of polypropylene, 40% of wood powder, 4% of compatilizer, 3% of coupling agent, 2% of lubricant and 1% of antioxidant. The long glass fiber reinforced polypropylene material semi-finished product system comprises 54% of polypropylene, 4% of compatilizer, 1% of antioxidant, 1% of lubricant and the like. By adopting the production process of the long glass fiber reinforced thermoplastic material, the prepared composite material has the advantages of excellent rigidity and toughness balance, dimensional stability, high surface hardness, good scratch resistance and the like, further breaks through the application limitation of the wood-plastic composite material in the automotive interior parts, and has good market value.
Description
Technical Field
The invention relates to a preparation method of a long glass fiber reinforced polypropylene wood-plastic composite material for automotive interior decoration. Specifically, the material takes polypropylene resin as a matrix, and on one hand, the material is endowed with high rigidity and high hardness by using a pultrusion process of continuous glass fibers; on the other hand, the wood powder filling mode can improve the texture and aesthetic feeling of the composite material. The finally prepared composite material integrates strength and aesthetics, can be widely applied to decorative functional materials of automotive interiors, and has unique advantages in material selection of parts such as door interior trim panels, left and right side wall trim panels, hatracks and the like.
Background
The innovation of technology promotes the design of automotive interior to be continuously new. Nowadays, people also pay attention to the riding experience of environmental protection and affinity nature while enjoying convenience brought by high technology. As a low-cost and easy-to-process material, the wood-plastic composite material greatly meets the experience and the demand of users, and is mature and applied to more and more vehicle types.
Generally, wood-plastic composites are prepared by blending natural fibers such as wood fibers and plant fibers with a molten thermoplastic polymer under high temperature and high pressure conditions, and then cooling, pelletizing and drying the blended materials. The composite material not only has the texture and the pattern of a wood material, but also has the characteristics of easy processing, corrosion resistance, difficult mildew and the like of a thermoplastic polymer, and has unique advantages in the selection of materials for automotive interiors. However, the wood-plastic composite materials applied in the current market generally have the defects of poor scratch resistance, low surface hardness, insufficient strength and the like, and the performance defects limit the application field of the materials and greatly limit the difficulty and the degree of freedom of part design.
The long glass fiber reinforced polypropylene material is used as an engineering plastic with excellent performance and low cost, and is widely applied to functional parts such as automobile front end frames, skylight frameworks, instrument panels and the like. The continuous glass fiber is made to pass through soaking tank filled with molten thermoplastic polymer under the action of traction force, and through water cooling, air drying and pelletizing, granular material of certain length is obtained. Wherein, the outer tension frame before entering the die cavity and the tension rods distributed in the die cavity provide enough acting force for the continuous glass fiber, so that the monofilament and the glass fiber bundle have good dipping effect. Compared with the common short fiber reinforced material, the composite material has the characteristics of better rigidity and toughness balance, fatigue resistance, dimensional stability and the like.
Therefore, the long glass fiber reinforced polypropylene composite material is applied to the wood-plastic composite material by combining the excellent performance characteristics of the long glass fiber reinforced polypropylene material, can effectively improve the performance defects commonly existing in the existing wood-plastic composite material, greatly improves the design freedom degree of terminal parts, and has positive significance for widening the application range of the wood-plastic composite material in automotive interior.
Disclosure of Invention
The invention relates to a preparation method of a long glass fiber reinforced polypropylene wood-plastic composite material for automotive interiors, which is characterized in that a production process of a long glass fiber reinforced thermoplastic material is applied, so that the prepared composite material has the advantages of high strength, high impact strength, high dimensional stability, high surface hardness and the like, the problems of poor scratch resistance, low strength and the like of the existing wood-plastic composite material are solved, the application range and the application field of the wood-plastic composite material in the automotive interiors are greatly expanded, and the long glass fiber reinforced polypropylene wood-plastic composite material has good market prospect and application value.
The technical scheme adopted by the invention is a mixing method, and the composition of the final finished product material comprises two parts:
polypropylene/wood powder composite material semi-finished product
Long glass fiber reinforced polypropylene material semi-finished product
Wherein:
the formula system of the polypropylene/wood powder composite semi-finished product is as follows:
50 percent of polypropylene
40% of wood powder
4 percent of compatilizer
3 percent of coupling agent
2 percent of lubricant
1 percent of antioxidant
The long glass fiber reinforced polypropylene material semi-finished product formula system is as follows:
54 percent of polypropylene
40 percent of continuous long glass fiber
4 percent of compatilizer
1 percent of antioxidant
1 percent of lubricant
The polypropylene base material is high-fluidity and high-rigidity homopolymerized polypropylene. Wherein, the high fluidity can ensure the impregnation effect of the glass fiber and the base material and reduce the risk of fiber floating in the appearance. High stiffness may further optimize the strength of the composite.
The linear density of the continuous long glass fiber is 2400Tex, and the diameter of the monofilament is 15 mu m. The surface of the glass fiber is coated with a layer of polar groups such as polyolefin sizing agent and silane coupling agent, which is beneficial to the interface combination between the inorganic glass fiber and the thermoplastic matrix.
The wood powder is birch, white and grey in color, the particle size is 40-100 meshes, the ash content is less than or equal to 8%, and the water content is less than 6%.
The antioxidant is a self-made auxiliary agent master batch, and the main components of the antioxidant comprise a polyolefin carrier, a main antioxidant, an auxiliary antioxidant, calcium carbonate and the like. Wherein the main antioxidant adopts hindered phenols, and the auxiliary antioxidant adopts phosphite esters and thioesters compound form, which can effectively ensure the thermo-oxidative aging requirement of the material.
The compatilizer is maleic anhydride grafted polyolefin, and the characteristics of high grafting rate and low odor can improve the comprehensive performance of the composite material.
The coupling agent is mainly used for improving the interface bonding force between the wood powder and the base material, thereby improving the appearance and the mechanical property of the wood-plastic composite material
The lubricant is siloxane polymer, and has the characteristics of ultrahigh molecular weight, difficult precipitation, polymer internal friction reduction, part demoulding improvement and the like.
The invention also provides a preparation method of the long glass fiber reinforced polypropylene wood-plastic composite material, which comprises the following steps:
1. preparing a polypropylene/wood powder composite semi-finished product:
(1) adding raw materials such as a polypropylene antioxidant, a coupling agent, a compatilizer and the like into a mixer according to corresponding mass proportion, and uniformly stirring.
(2) And (3) feeding the uniformly mixed material into a main feeding port of the extruder, feeding the wood flour filler from a side feeding port, and controlling the main feeding speed, the side feeding speed and the main machine rotating speed to ensure uniform and stable wood flour content.
(3) And shearing the molten material by a screw, flowing out of a die head, and carrying out water cooling, air drying, grain cutting, vibration screening and drying on the molten material to obtain a semi-finished product of the polypropylene/wood powder composite material.
2. Preparing a long glass fiber reinforced polypropylene semi-finished product:
(3) and (3) putting the polypropylene resin, the compatilizer, the antioxidant and the lubricant into a stirrer according to corresponding mass proportion, and mixing.
(4) And (3) putting the uniformly mixed material into a main feeding port of the extruder, and allowing the molten material to flow into the die cavity under the action of a screw conveying block in the extruder. And the other side of the die cavity is connected with a creel filled with continuous glass fiber clusters, and the glass fibers pass through the die cavity, are extruded out from the die head, and are subjected to water cooling, air drying, grain cutting and drying to obtain a long glass fiber reinforced polypropylene semi-finished product.
3. Pouring the prepared long glass fiber reinforced polypropylene semi-finished product and the polypropylene/wood powder composite semi-finished product into a mixer according to a certain mass ratio, and uniformly stirring to obtain the long glass fiber reinforced polypropylene wood-plastic composite. Wherein, the stirring speed is: 1000r/min, stirring time: and 5 min.
Compared with the prior art, the invention has the following beneficial effects:
1. high rigidity and high surface hardness. By applying the production process of the long glass fiber reinforced polypropylene material, the composite material has the characteristics of excellent rigidity and toughness balance, size stability, fatigue resistance, high surface hardness and the like, and the defects of low strength, poor scratch resistance and the like of the wood-plastic composite material in the current market are effectively improved.
2. High cost performance. The long glass fiber reinforced polypropylene material has the market price of general plastics while keeping the high performance characteristics of engineering plastics, and has a plurality of mature application cases in the process of replacing engineering plastics such as PA, PBT and the like. Therefore, the advantage of the long glass fiber reinforced material is introduced into the wood-plastic composite material, so that the good cost performance of the material can be effectively ensured, and the application and popularization of the composite material are accelerated.
The specific implementation mode is as follows:
the raw materials used are as follows:
polypropylene M60T, high melt index, homo-polypropylene, melt index 60g/10min, test conditions 230 ℃ 2.16kg continuous Long glass fiber SE4805-2400 Erwinin, diameter 15 μ M, Linear Density 2400Tex compatibilizer maleic anhydride grafted Polypropylene 200A commercially available
Self-made antioxidant
Wood flour Lingshou county cis-Lei mineral product processing factory
KH-550 coupling agent, 99% purity, Dongguan city Lvwei Plastic products Co., Ltd
Lubricant LYSI-306, Chengdu Sicchi technologies, Inc
Evaluation mode of product performance
Tensile property: ISO 527, spline size: 170mm 10mm 4 mm; and (3) testing conditions are as follows: 5mm/min
Bending property: ISO 178, spline size: 80mm by 10mm by 4 mm; and (3) testing conditions are as follows: 2mm/min, 64mm
Notched impact strength: ISO 179, spline size: 80mm 10mm 4mm
Scratch resistance: reference standard PV3952, sample size: 100 mm. Placing a sample on a scraping instrument device, after the device is started, forming crossed scratches on the surface of the sample plate by a scraping head, and evaluating the scraping resistance of the sample plate by comparing the color difference value delta L before and after scraping
Rockwell hardness: with reference to the standard GB/T3398.2-2008, HR 130-e, where e denotes the penetration depth after the removal of the main load. The higher the Rockwell hardness, the harder the material
Example 1:
(1) 150Kg of polypropylene/wood powder composite semi-finished product and 50Kg of long glass fiber reinforced polypropylene semi-finished product are prepared, and the two semi-finished products need to be mixed uniformly.
(2) Wherein the polypropylene/wood flour composite material is prepared by mixing and extruding 75Kg of M60T, 60Kg of wood flour, 6Kg of compatilizer 200A, 1.5Kg of antioxidant additive package, 4.5Kg of coupling agent KH-550 and 3Kg of lubricant LYSI-306. It should be noted that the wood flour is fed by side feeding, and the rotating speed of the main machine, the feeding speed and the side feeding speed are required to be consistent, so that the content of the wood flour is kept stable.
(3) The long glass fiber reinforced polypropylene material semi-finished product is prepared by mixing and extruding 27Kg of M60T, 2Kg of compatilizer 200A, 0.5Kg of antioxidant additive package and 0.5Kg of lubricant LYSI-306. And shearing the molten material by a screw of an extruder, flowing into a die cavity under the action of a conveying block element, simultaneously, allowing continuous long glass fibers to enter a dipping tank through a yarn guide roller and the die cavity under the action of traction equipment, penetrating out from the other end of the dipping tank at a constant moving speed, solidifying the melt when meeting cold water, and carrying out air drying, grain cutting and drying to obtain the long glass fiber reinforced polypropylene material semi-finished product.
Example 2:
(1) preparing a 100KG polypropylene/wood powder composite semi-finished product and a 100KG long glass fiber reinforced polypropylene semi-finished product, wherein the two semi-finished products need to be mixed uniformly.
(2) Wherein the polypropylene/wood flour composite material is prepared by mixing and extruding 50Kg of M60T, 40Kg of wood flour, 4Kg of compatilizer 200A, 1Kg of antioxidant additive package, 3Kg of coupling agent KH-550 and 2Kg of lubricant LYSI-306. It should be noted that the wood flour is fed by side feeding, and the rotating speed of the main machine, the feeding speed and the side feeding speed are required to be consistent, so that the content of the wood flour is kept stable.
(3) The long glass fiber reinforced polypropylene material semi-finished product is prepared by mixing and extruding 54Kg of M60T, 4Kg of compatilizer 200A, 1Kg of antioxidant additive package and 1Kg of lubricant LYSI-306. And shearing the molten material by a screw of an extruder, flowing into a die cavity under the action of a conveying block element, simultaneously, allowing continuous long glass fibers to enter a dipping tank through a yarn guide roller and the die cavity under the action of traction equipment, penetrating out from the other end of the dipping tank at a constant moving speed, solidifying the melt when meeting cold water, and carrying out air drying, grain cutting and drying to obtain the long glass fiber reinforced polypropylene material semi-finished product.
Example 3:
(1) preparing 75Kg of polypropylene/wood powder composite semi-finished product and 125Kg of long glass fiber reinforced polypropylene semi-finished product, wherein the two semi-finished products need to be mixed uniformly.
(2) Wherein the polypropylene/wood flour composite material is prepared by mixing and extruding 37.5Kg of M60T, 30Kg of wood flour, 3Kg of compatilizer 200A, 0.75Kg of antioxidant additive package, 2.25Kg of coupling agent KH-550 and 1.5Kg of lubricant LYSI-306. It should be noted that the wood flour is fed by side feeding, and the rotating speed of the main machine, the feeding speed and the side feeding speed are required to be consistent, so that the content of the wood flour is kept stable.
(3) The long glass fiber reinforced polypropylene material semi-finished product is prepared by mixing and extruding 67.5Kg of M60T, 5Kg of compatilizer 200A, 1.25Kg of antioxidant additive package and 1.25Kg of lubricant LYSI-306. And shearing the molten material by a screw of an extruder, flowing into a die cavity under the action of a conveying block element, simultaneously, allowing continuous long glass fibers to enter a dipping tank through a yarn guide roller and the die cavity under the action of traction equipment, penetrating out from the other end of the dipping tank at a constant moving speed, solidifying the melt when meeting cold water, and carrying out air drying, grain cutting and drying to obtain the long glass fiber reinforced polypropylene material semi-finished product.
Comparative example 1:
150Kg of M60T, 8Kg of compatilizer 200A, 2Kg of antioxidant additive package, 6Kg of coupling agent KH-550 and 4Kg of lubricant LYSI-306 are mixed uniformly for standby. Pouring the uniform mixture into a main feeding port of an extruder, pouring 30Kg of wood powder into a side feeding port, controlling the consistency of the rotating speed of a main machine, the feeding speed and the side feeding speed, maintaining the stability of the wood powder content, enabling the melt to flow out of a die cavity port, and obtaining the polypropylene wood-plastic composite material with the wood powder content of 20% after water cooling, air drying, grain cutting and drying.
Comparative example 2:
140Kg of M60T, 8Kg of compatilizer 200A, 2Kg of antioxidant additive package, 6Kg of coupling agent KH-550 and 4Kg of lubricant LYSI-306 are mixed uniformly for later use. Pouring the uniform mixture into a main feeding port of an extruder, pouring 40Kg of wood powder into a side feeding port, controlling the consistency of the rotating speed of a main machine, the feeding speed and the side feeding speed, maintaining the stability of the wood powder content, enabling the melt to flow out of a die cavity port, and obtaining the polypropylene wood-plastic composite material with the wood powder content of 20% after water cooling, air drying, grain cutting and drying.
Comparative example 3:
120Kg of M60T, 8Kg of compatilizer 200A, 2Kg of antioxidant additive package, 6Kg of coupling agent KH-550 and 4Kg of lubricant LYSI-306 are mixed uniformly for standby. And pouring the uniform mixture into a main feeding port of an extruder, pouring 60Kg of wood powder into a side feeding port, controlling the consistency of the rotating speed of a main machine, the feeding speed and the side feeding speed, maintaining the stability of the wood powder content, enabling the melt to flow out of a die cavity port, and performing water cooling, air drying, grain cutting and drying to obtain the polypropylene wood-plastic composite material with the wood powder content of 30%.
As can be seen from the data in the table, by comparing the performance data of the examples 1, 2 and 3 with the performance data of the comparative examples 1, 2 and 3, the comprehensive performance of the long glass fiber reinforced polypropylene wood-plastic composite material is far better than that of the common polypropylene wood-plastic composite material under the condition of the same wood powder content, and the conventional mechanical property, the surface hardness and the scratch resistance have obvious advantages. In the data of examples 1, 2 and 3, the tensile property, the bending property and the surface hardness of the composite material are obviously reduced along with the reduction of the content of the glass fiber, but the impact resistance and the scratch resistance are not greatly influenced, so that a proper ratio of the glass fiber to the wood powder needs to be selected according to the use condition and the structural design of the part when the material is selected, and the appearance and the performance of the part are balanced.
The composite material obtained by the invention has the advantages of high strength, high impact strength, high dimensional stability, high surface hardness and the like, solves the problems of poor scratch resistance, low strength and the like of the existing wood-plastic composite material, and greatly expands the application range and field of the wood-plastic composite material in the automotive interior material.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The preparation method of the long glass fiber reinforced polypropylene wood-plastic composite material for the automotive interior is characterized in that a system comprises two semi-finished products: a polypropylene/wood powder composite material semi-finished product and a long glass fiber reinforced polypropylene material semi-finished product. Wherein: the formula system of the polypropylene/wood powder composite semi-finished product is as follows:
the long glass fiber reinforced polypropylene material semi-finished product formula system is as follows:
2. the preparation method of the long glass fiber reinforced polypropylene wood-plastic composite material for the automotive interior according to claim 1, characterized in that: the polypropylene is high-fluidity and high-rigidity homopolymerized polypropylene, so that on one hand, the impregnation effect of the glass fiber and the resin is ensured, and the risks of fiber floating and agglomeration in appearance are reduced. On the other hand, the strength of the composite material is ensured to the maximum extent.
3. The preparation method of the long glass fiber reinforced polypropylene wood-plastic composite material for the automotive interior according to claim 1, characterized in that: the continuous long glass fiber filaments had a diameter of 15 μm and a linear density of 2400 Tex.
4. The preparation method of the long glass fiber reinforced polypropylene wood-plastic composite material for the automotive interior according to claim 1, characterized in that: the wood powder is birch, the wood powder is white and gray, the particle size is 40-100 meshes, the ash content is less than or equal to 8%, and the water content is less than 6%.
5. The preparation method of the long glass fiber reinforced polypropylene wood-plastic composite material for the automotive interior according to claim 1, characterized in that: in the preparation process of the semi-finished polypropylene/wood powder composite material, the wood powder adopts a side feeding mode. The feeding mode can reduce the shearing action of the screw on the wood powder and furthest reserve the microscopic length of the wood powder, thereby being beneficial to maintaining the performance of the wood-plastic composite material.
6. The preparation method of the long glass fiber reinforced polypropylene wood-plastic composite material for the automotive interior according to claim 1, characterized in that: the preparation process of the long glass fiber reinforced polypropylene semi-finished product comprises the following steps:
(1) and (3) putting the polypropylene resin, the compatilizer, the antioxidant and the lubricant into a stirrer according to corresponding mass proportion, and mixing.
(2) The uniformly mixed material is put into a main feeding port of the extruder, and the molten material flows into the die cavity under the action of the screw conveying block. And the other side of the die cavity is connected with a creel filled with continuous glass fiber clusters, and the glass fibers pass through the die cavity, are extruded out from the die head, and are subjected to water cooling, air drying, grain cutting and drying to obtain a long glass fiber reinforced polypropylene semi-finished product.
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| US20090182071A1 (en) * | 2008-01-15 | 2009-07-16 | Joyce Robert C | Wood composite alloy composition having a compatibilizer that improves the ability to process and compress cellulosic fiber |
| CN105061851A (en) * | 2015-07-31 | 2015-11-18 | 山东理工大学 | Long fiber reinforced polyolefin wood-plastic composite material and preparation method thereof |
| US20180072889A1 (en) * | 2016-08-04 | 2018-03-15 | Nanjing Tech University | Lignin Enhanced Wood-Plastic Material and Preparation Method thereof |
| CN112724526A (en) * | 2020-12-29 | 2021-04-30 | 上海普利特复合材料股份有限公司 | Low-agglomeration long glass fiber reinforced polypropylene composite material for automotive interior and preparation method thereof |
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- 2021-05-20 CN CN202110551011.9A patent/CN113512213A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090182071A1 (en) * | 2008-01-15 | 2009-07-16 | Joyce Robert C | Wood composite alloy composition having a compatibilizer that improves the ability to process and compress cellulosic fiber |
| CN105061851A (en) * | 2015-07-31 | 2015-11-18 | 山东理工大学 | Long fiber reinforced polyolefin wood-plastic composite material and preparation method thereof |
| US20180072889A1 (en) * | 2016-08-04 | 2018-03-15 | Nanjing Tech University | Lignin Enhanced Wood-Plastic Material and Preparation Method thereof |
| CN112724526A (en) * | 2020-12-29 | 2021-04-30 | 上海普利特复合材料股份有限公司 | Low-agglomeration long glass fiber reinforced polypropylene composite material for automotive interior and preparation method thereof |
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