CN112608505A - Reinforced acrylic composite board and preparation method thereof - Google Patents
Reinforced acrylic composite board and preparation method thereof Download PDFInfo
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- CN112608505A CN112608505A CN202011545530.6A CN202011545530A CN112608505A CN 112608505 A CN112608505 A CN 112608505A CN 202011545530 A CN202011545530 A CN 202011545530A CN 112608505 A CN112608505 A CN 112608505A
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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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
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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
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
- C08J2333/12—Homopolymers or copolymers of methyl methacrylate
-
- 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
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
- C08J2433/12—Homopolymers or copolymers of methyl methacrylate
-
- 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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- 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
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- 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
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/06—Polyamides derived from polyamines and polycarboxylic acids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a reinforced acrylic composite board and a preparation method thereof, wherein the middle part of the reinforced acrylic composite board is a composite layer compounded by acrylic and rib wires, the thickness of the composite layer is 3-40 mm, the rib wires are distributed in the board at equal intervals in the width direction of the acrylic board, the rib wires are parallel to the length direction, and each rib wire is of a linear structure; the upper surface and the lower surface of the composite layer are uniformly coated with UV coatings, the thickness of each UV coating is 50-400 mu m, the cross section shape of the rib is a geometric shape or a combination of multiple shapes, and the spacing between the ribs is 10-200 mm. The invention adopts a melt co-extrusion mode, realizes the continuous and large-scale production of the acrylic composite board with the reinforced inner part and the UV layer coated on the surface, improves the production efficiency, greatly reduces the production cost and simultaneously reduces the pollution discharge. The thickness, the size, the color and the performance of the rib of the reinforced acrylic plate can be flexibly adjusted.
Description
Technical Field
The invention belongs to the technical field of acrylic composite boards, and particularly relates to a melt co-extrusion reinforced acrylic composite board with a UV layer on the surface and a preparation method thereof.
Background
The reinforced acrylic plate is realized by adopting a casting process in the prior art at present, MMA liquid raw materials and an initiator are stirred and mixed, then are heated and polymerized to a certain conversion rate, then are cooled to obtain a prepolymer solution, the prepolymer solution is poured into a mold with a rib wire in advance, is heated in a water bath until being completely polymerized, and then is subjected to subsequent demolding and processing to obtain the reinforced acrylic plate. The reinforced acrylic plate obtained by the method in the prior art has the advantages of high strength and impact resistance, and has the advantage of bird collision prevention when being used in an outdoor sound barrier. But the prior art has the obvious defects of long casting process flow, low production efficiency, unsuitability for mass production, poor thickness and precision of the casting plate and large thickness deviation; the size of the produced product is limited by the size of the die, and the customized production cannot be flexibly carried out; a large amount of waste gas and cooling waste water are generated in the production process, so that the environment is polluted; an MMA monomer with high price is required to be adopted, so the unit price cost is high; ultraviolet rays penetrate through the cast acrylic sheet, and the internal ribs are affected by the ultraviolet rays to cause performance degradation.
Disclosure of Invention
The invention provides a reinforced acrylic composite board and a preparation method thereof, aiming at overcoming the defects in the prior art.
The invention is realized by the following technical scheme: a middle part of the reinforced acrylic composite plate is a composite layer formed by compounding acrylic and rib lines, the thickness of the composite layer is 3-40 mm, the rib lines are distributed in the plate at equal intervals in the width direction of the acrylic plate, the rib lines are parallel to the length direction, and each rib line is of a linear structure; the upper surface and the lower surface of the composite layer are uniformly coated with UV coatings, the thickness of each UV coating is 50-400 mu m, the cross section shape of the rib is a geometric shape or a combination of multiple shapes, the spacing of the rib is not limited, the spacing of the rib is 10-200 mm, and the most preferable is 20-50 mm.
The distance of the rib line relative to the upper and lower surfaces is not limited, and most preferably, the center position of the rib line is equidistant from the upper and lower surfaces.
The thickness of the composite layer is 8-30 mm, most preferably 12-28 mm, and the thickness of the UV coating is 50-200 μm, most preferably 50-150 μm;
the cross section of the rib line is circular, triangular line or diamond. When the cross section of the rib wire is circular, the diameter of the circular cross section of the rib wire is 0.3-5 mm. Or the diameter of the circular cross section of the rib line is preferably 1-3 mm according to the thickness of the reinforced acrylic composite plate.
The rib is thermoplastic material, and the material of the rib can include but not limited to nylon 6, nylon 66, polycarbonate, PMMA, PET, PETG or one or more of their reinforced and toughened composite materials, preferably nylon 6 reinforced composite material.
The acrylic is extrusion-grade PMMA, the molecular weight is 5-50 ten thousand, and the preferred molecular weight is extrusion-grade acrylic with the molecular weight more than 10 ten thousand.
The UV master batch for forming the UV coating is prepared by taking PMMA as a base material, adding a raw material of a high-concentration ultraviolet absorber UVA, wherein the addition amount of the UVA is 1-15%, and adding an antioxidant, a release agent and a toner pigment.
Preferably, the addition amount of UVA is 1-12%, and the UVA is one or a combination of hindered amines, benzones, triazines and benzotriazoles.
The invention also discloses a preparation method of the reinforced acrylic composite board, which comprises the following steps:
(1) respectively carrying out pretreatment and sufficient dehumidification drying on the rib wire raw material and the UV master batch at the drying temperature of 90-100 ℃ for more than 4 h;
(2) plasticizing an acrylic raw material by adopting a single-screw extruder at the plasticizing temperature of 180-250 ℃, wherein the extruder is provided with a vacuum pumping system to pump away low-molecular volatile substances generated in the plasticizing process, enabling a melt to enter a distributor runner after passing through a metering pump, dividing the melt into an upper surface flow path and a lower surface flow path, expanding the fluid through a hanger-shaped runner, and converging the fluid with a rib line melt of a middle layer and a UV master batch melt of the outermost layer at an outlet in a die head;
(3) plasticizing the UV master batch raw material by adopting a single-screw extruder at the plasticizing temperature of 180-250 ℃, wherein the extruder is provided with a raw material drying system and a vacuumizing system to pump away low-molecular volatile substances generated in the plasticizing process; the melt enters a distributor flow channel after passing through a metering pump, and is divided into an upper independent surface flow channel and a lower independent surface flow channel, and the fluid is expanded through a clothes hanger type flow channel and then is converged with the lower acrylic melt at an outlet in a die head;
(4) plasticizing the rib raw material by adopting a single-screw extruder at the plasticizing temperature of 200-280 ℃, and providing a vacuumizing system for the extruder so as to pump away low-molecular volatile substances generated in the plasticizing process; after passing through a metering pump, the melt enters porous runners which are arranged in parallel, the melt is pushed in the parallel flowing direction, and after the fluid expands through a clothes hanger type runner, the fluid is converged with the acrylic melt on the upper layer and the lower layer at an outlet in a die head;
(5) after the rib lines and the acrylic melt are converged, the transverse width of the flow channel is fixed, and the composite melt layer flows out from the outlet of the die head in the same direction and is in a material sheet shape;
(6) the composite layer melt material sheet is cooled and shaped by the three-roller calender, and the thickness of the composite board can be flexibly controlled by adjusting the rotating speed of the three-roller calender; and obtaining the composite board through the subsequent drawing and annealing processes.
The invention mainly adopts a plurality of extruders to carry out co-extrusion compounding to prepare the acrylic composite board with the reinforcing rib lines inside, and the UV absorption layer is preferably co-extruded on the surface. The rib line raw material, the acrylic raw material and the UV master batch are respectively melted by different extruders, rib line melt is directly extruded through porous runners distributed at equal intervals, acrylic and UV master batch melt are respectively divided into two paths of fluid from respective extruder outlets and extruded from an upper surface type runner and a lower surface type runner, and the runner has 4 surface type runners in total and is preferably in a parallel symmetrical structure. In the process of pushing towards the outlet of the die, the transverse width of the 4 surface type runners and the hole type runners of the rib lines is gradually stretched and increased and is expanded like a hanger type, after the maximum width is reached, the three runners continue to extend in parallel, and at a certain position, the three runners are converged, the melts are converged in the same shearing direction at approximately equal flow rate and pressure to form a multilayer composite melt structure, the melt of the rib lines is wrapped in the melt of the acrylic, because the compatibility and the melting point of the two are different, the melt of the rib lines keeps a strip shape, the melt fluid is extruded from the outlet of the die together in the same flow direction, and the reinforced acrylic composite board finished product is prepared through the procedures of sizing, cooling, traction and subsequent procedures of a roller.
The invention has the beneficial effects that: the invention adopts a melt co-extrusion mode, realizes the continuous and large-scale production of the acrylic composite board with the reinforced inner part and the UV layer coated on the surface, improves the production efficiency, greatly reduces the production cost and simultaneously reduces the pollution discharge. The flexible adjustment of the thickness, the dimension, the color and the performance of the reinforced acrylic plate is realized in the aspect of performance; the reinforced acrylic composite board has greatly improved dimensional accuracy and UV resistance.
Drawings
Fig. 1 is a schematic sectional structure view of a reinforced acrylic composite plate;
fig. 2 is a perspective view of a reinforced acryl composite panel;
in the figure: 1-applying a UV coating; 2-rib lines; 3-composite layer; 4-lower UV coating.
Detailed Description
The invention is described in detail below with reference to the figures and the detailed description.
As shown in fig. 1 to 2, the invention discloses a reinforced acrylic composite board, the middle part of the reinforced acrylic composite board is a composite layer 3 formed by compounding acrylic and rib wires 2, the thickness of the composite layer 3 is 3-40 mm, the rib wires 2 are distributed in the board at equal intervals in the width direction of the acrylic board, the rib wires 2 are parallel to the length direction, and each rib wire 2 is of a linear structure; the upper surface and the lower surface of the composite layer 3 are uniformly coated with an upper UV coating 1 and a lower UV coating 4, the thickness of each UV coating is 50-400 mu m, the cross section shape of the rib lines 2 is a geometric shape or a combination of multiple shapes, the space between the rib lines 2 is not limited, and the space between the rib lines 2 is 10-200 mm, most preferably 20-50 mm.
The distance of the bead wires 2 from the upper and lower surfaces is not limited, and it is most preferable that the center positions of the bead wires 2 are equidistant from the upper and lower surfaces. The thickness of the composite layer 3 is 8-30 mm, most preferably 12-28 mm, and the thickness of the UV coating is 50-200 μm, most preferably 50-150 μm; the cross-sectional shape of the rib wire 2 is circular, triangular wire or diamond, etc. When the cross section of the rib wire 2 is circular, the diameter of the circular cross section of the rib wire 2 is 0.3-5 mm. Or the diameter of the circular cross section of the rib line 2 is preferably 1-3 mm according to the thickness of the reinforced acrylic composite plate.
The rib 2 is a thermoplastic material, and the material of the rib 2 may include but is not limited to nylon 6, nylon 66, polycarbonate, PMMA, PET, PETG or one or a mixture of several of their reinforced and toughened composite materials, preferably nylon 6 reinforced composite material. The acrylic is extrusion-grade PMMA, the molecular weight is 5-50 ten thousand, and the preferred molecular weight is extrusion-grade acrylic with the molecular weight more than 10 ten thousand. The UV master batch for forming the UV coating is prepared by taking PMMA as a base material, adding a raw material of a high-concentration ultraviolet absorber UVA, wherein the addition amount of the UVA is 1-15%, and adding an antioxidant, a release agent and a toner pigment. Preferably, the addition amount of UVA is 1-12%, and the UVA is one or a combination of hindered amines, benzones, triazines and benzotriazoles.
The invention also discloses a preparation method of the reinforced acrylic composite board, which comprises the following steps:
(1) respectively carrying out pretreatment and sufficient dehumidification drying on the rib 2 raw material and the UV master batch at the drying temperature of 90-100 ℃ for more than 4 h;
(2) plasticizing an acrylic raw material by adopting a single-screw extruder at the plasticizing temperature of 180-250 ℃, wherein the extruder is provided with a vacuum pumping system to pump away low-molecular volatile substances generated in the plasticizing process, enabling a melt to enter a distributor runner after passing through a metering pump, dividing the melt into an upper surface flow path and a lower surface flow path, expanding the fluid through a hanger-shaped runner, and converging the melt with a rib line 2 in a middle layer and a UV master batch melt on the outermost layer at an outlet in a die head;
(3) plasticizing the UV master batch raw material by adopting a single-screw extruder at the plasticizing temperature of 180-250 ℃, wherein the extruder is provided with a raw material drying system and a vacuumizing system to pump away low-molecular volatile substances generated in the plasticizing process; the melt enters a distributor flow channel after passing through a metering pump, and is divided into an upper independent surface flow channel and a lower independent surface flow channel, and the fluid is expanded through a clothes hanger type flow channel and then is converged with the lower acrylic melt at an outlet in a die head;
(4) plasticizing the raw material of the rib wire 2 by adopting a single-screw extruder at the plasticizing temperature of 200-280 ℃, and providing a vacuumizing system for the extruder so as to pump away low-molecular volatile substances generated in the plasticizing process; after passing through a metering pump, the melt enters porous runners which are arranged in parallel, the melt is pushed in the parallel flowing direction, and after the fluid expands through a clothes hanger type runner, the fluid is converged with the acrylic melt on the upper layer and the lower layer at an outlet in a die head;
(5) after the rib lines 2 are converged with the acrylic melt, the transverse width of the flow channel is fixed, and the composite melt layer flows out from the outlet of the die head in the same direction and is in a material sheet shape;
(6) the melt material sheet of the composite layer 3 is cooled and shaped by a three-roller calender, and the thickness of the composite board can be flexibly controlled by adjusting the rotating speed of the three-roller calender; and obtaining the composite board through the subsequent drawing and annealing processes.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The reinforced acrylic composite board is characterized in that: the middle part of the reinforced acrylic composite board is a composite layer formed by compounding acrylic and rib wires, the thickness of the composite layer is 3-40 mm, the rib wires are distributed in the board at equal intervals in the width direction of the acrylic board, the rib wires are parallel to the length direction, and each rib wire is of a linear structure; the upper surface and the lower surface of the composite layer are uniformly coated with UV coatings, the thickness of each UV coating is 50-400 mu m, the cross section shape of the rib line is a geometric shape or a combination of a plurality of shapes, and the interval between the rib lines is 10-200 mm.
2. The reinforced acrylic composite board according to claim 1, wherein: the distance between the center position of the rib line in the composite layer and the upper surface and the distance between the center position of the rib line and the lower surface are equal.
3. The reinforced acrylic composite board according to claim 1, wherein: the thickness of the composite layer is 8 mm-30 mm, and the thickness of the UV coating is 50 μm-200 μm.
4. The reinforced acrylic composite board according to claim 1, wherein: the cross section of the rib wire is circular, triangular or rhombic.
5. The reinforced acrylic composite board according to claim 4, wherein: when the cross section of the rib wire is circular, the diameter of the circular cross section of the rib wire is 0.3 mm-5 mm.
6. The reinforced acrylic composite board according to claim 1, wherein: the rib lines are made of thermoplastic materials, and the material of the rib lines is one or a mixture of more of nylon 6, nylon 66, polycarbonate, PMMA, PET, PETG or reinforced and toughened composite materials thereof.
7. The reinforced acrylic composite board according to claim 1, wherein: the acrylic is extrusion-grade PMMA, and the molecular weight of the acrylic is 5-50 ten thousand.
8. The reinforced acrylic composite board according to claim 1, wherein: the UV master batch for forming the UV coating is prepared by taking PMMA as a base material, adding a raw material of a high-concentration ultraviolet absorber UVA, wherein the addition amount of the UVA is 1-15%, and adding an antioxidant, a demolding agent and a toner pigment.
9. The reinforced acrylic composite board according to claim 8, wherein: the addition amount of UVA is 1-12%, and UVA is one or a plurality of hindered amines, benzophenones, triazines and benzotriazoles.
10. The method for preparing the reinforced acrylic composite board according to claim 1, wherein the method comprises the following steps: the preparation method of the reinforced acrylic composite board specifically comprises the following steps:
(1) respectively carrying out pretreatment and sufficient dehumidification drying on the rib wire raw material and the UV master batch at the drying temperature of 90-100 ℃ for more than 4 h;
(2) plasticizing an acrylic raw material by adopting a single-screw extruder at the plasticizing temperature of 180-250 ℃, wherein the extruder is provided with a vacuum pumping system to pump away low-molecular volatile substances generated in the plasticizing process, enabling a melt to enter a distributor runner after passing through a metering pump, dividing the melt into an upper surface flow path and a lower surface flow path, expanding the fluid through a hanger-shaped runner, and converging the fluid with a rib line melt of a middle layer and a UV master batch melt of the outermost layer at an outlet in a die head;
(3) plasticizing the UV master batch raw material by adopting a single-screw extruder at the plasticizing temperature of 180-250 ℃, wherein the extruder is provided with a raw material drying system and a vacuumizing system to pump away low-molecular volatile substances generated in the plasticizing process; the melt enters a distributor flow channel after passing through a metering pump, and is divided into an upper independent surface flow channel and a lower independent surface flow channel, and the fluid is expanded through a clothes hanger type flow channel and then is converged with the lower acrylic melt at an outlet in a die head;
(4) plasticizing the rib raw material by adopting a single-screw extruder at the plasticizing temperature of 200-280 ℃, and providing a vacuumizing system for the extruder so as to pump away low-molecular volatile substances generated in the plasticizing process; after passing through a metering pump, the melt enters porous runners which are arranged in parallel, the melt is pushed in the parallel flowing direction, and after the fluid expands through a clothes hanger type runner, the fluid is converged with the acrylic melt on the upper layer and the lower layer at an outlet in a die head;
(5) after the rib lines and the acrylic melt are converged, the transverse width of the flow channel is fixed, and the composite melt layer flows out from the outlet of the die head in the same direction and is in a material sheet shape;
(6) the composite layer melt material sheet is cooled and shaped by a three-roller calender, and the thickness of the composite board is flexibly controlled by adjusting the rotating speed of the three-roller calender; and obtaining the composite board through the subsequent drawing and annealing processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011545530.6A CN112608505A (en) | 2020-12-23 | 2020-12-23 | Reinforced acrylic composite board and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011545530.6A CN112608505A (en) | 2020-12-23 | 2020-12-23 | Reinforced acrylic composite board and preparation method thereof |
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| CN112608505A true CN112608505A (en) | 2021-04-06 |
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| CN202011545530.6A Pending CN112608505A (en) | 2020-12-23 | 2020-12-23 | Reinforced acrylic composite board and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2297645A (en) * | 1941-12-22 | 1942-09-29 | Plax Corp | Process of and apparatus for extruding plastic sheets |
| CN101818483A (en) * | 2010-04-19 | 2010-09-01 | 海盐华帅特塑料电器有限公司 | Transparent PMMA composite sound barrier board and preparation method thereof |
| CN102704614A (en) * | 2012-06-07 | 2012-10-03 | 常州博双塑料有限公司 | Three-layer co-extrusion wear-resistance composite sheet material for building materials and preparation method of three-layer co-extrusion wear-resistance composite sheet material |
-
2020
- 2020-12-23 CN CN202011545530.6A patent/CN112608505A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2297645A (en) * | 1941-12-22 | 1942-09-29 | Plax Corp | Process of and apparatus for extruding plastic sheets |
| CN101818483A (en) * | 2010-04-19 | 2010-09-01 | 海盐华帅特塑料电器有限公司 | Transparent PMMA composite sound barrier board and preparation method thereof |
| CN102704614A (en) * | 2012-06-07 | 2012-10-03 | 常州博双塑料有限公司 | Three-layer co-extrusion wear-resistance composite sheet material for building materials and preparation method of three-layer co-extrusion wear-resistance composite sheet material |
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Application publication date: 20210406 |