CN112045967A - PC material and preparation method thereof - Google Patents
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- CN112045967A CN112045967A CN202010737288.6A CN202010737288A CN112045967A CN 112045967 A CN112045967 A CN 112045967A CN 202010737288 A CN202010737288 A CN 202010737288A CN 112045967 A CN112045967 A CN 112045967A
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- 239000000463 material Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 38
- 239000002131 composite material Substances 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- BQPNUOYXSVUVMY-UHFFFAOYSA-N [4-[2-(4-diphenoxyphosphoryloxyphenyl)propan-2-yl]phenyl] diphenyl phosphate Chemical compound C=1C=C(OP(=O)(OC=2C=CC=CC=2)OC=2C=CC=CC=2)C=CC=1C(C)(C)C(C=C1)=CC=C1OP(=O)(OC=1C=CC=CC=1)OC1=CC=CC=C1 BQPNUOYXSVUVMY-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 82
- 238000000034 method Methods 0.000 claims description 17
- 239000000155 melt Substances 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 10
- 238000007605 air drying Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000005453 pelletization Methods 0.000 claims 1
- 238000010924 continuous production Methods 0.000 abstract description 3
- 239000004417 polycarbonate Substances 0.000 description 42
- 230000000052 comparative effect Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000012545 processing Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
- B29C48/023—Extruding materials comprising incompatible ingredients
-
- 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
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a PC material and a preparation method thereof, and the preparation method comprises the following steps: adding 65-83 parts by mass of PC resin, 7-15 parts by mass of bisphenol A-bis (diphenyl phosphate) and 10-20 parts by mass of fiber into a double-screw extruder for melting; and extruding the obtained melt through a composite die head to obtain the PC material, wherein the total parts of the PC resin, the bisphenol A-bis (diphenyl phosphate) and the fibers are 100 parts. The preparation method can realize continuous production of the PC material, and the PC material obtained by the preparation method has good appearance and excellent mechanical property.
Description
Technical Field
The invention belongs to the technical field of modified plastic processing, and particularly relates to a PC material and a preparation method thereof.
Background
Polycarbonate (abbreviated as PC in english) is a high molecular polymer containing carbonate groups in its molecular chain, and is classified into various types such as aliphatic, aromatic, aliphatic-aromatic, and the like, depending on the structure of the ester groups. Among them, aliphatic and aliphatic-aromatic polycarbonates have limited their use as engineering plastics due to their low mechanical properties.
The PC material filled with the fibers has the advantages of low density, high modulus and strength, high temperature and chemical corrosion resistance, low thermal expansion coefficient and the like, and is widely applied to the fields of household appliances, energy sources, automobiles and the like. However, the fiber-filled PC material is easily broken and fluffed by friction with the die head during processing, resulting in a decrease in properties such as mechanical strength.
In order to solve the problems, the prior art discloses a composite die head for improving the friction between fibers and the die head, and solves the problems of more burrs on the appearance of a long fiber product and unsmooth and smooth appearance. However, in the processing process, the horizontal direction of the molten composite material after being demoulded is not parallel to the direction of the open slot of the die head due to the action of gravity and traction force, and although the outer layer is coated by the branch base material, the phenomenon that the outlet of the die head rubs the resin, the orientation of the fiber in the resin is changed, even the fiber is broken by grinding exists, the fiber in the molten body is easily broken by the tip angle part of the trumpet-shaped design at the inlet of the die head, and the die head is easily worn. In addition, because the inner extrusion channel and the second extrusion channel in the die head are directly connected, the melt strength of the PC material is sharply reduced in the processing process, and the defect of broken bars is easy to occur.
Disclosure of Invention
In view of the above, the present invention provides a PC material and a method for preparing the same, wherein the PC material is prepared by mixing raw materials, melting the raw materials by a twin-screw extruder, and extruding the molten raw materials through a composite die head, wherein both ends of the composite die head and a connection part of a first extrusion channel and a second extrusion channel are smooth arc sections, so as to solve the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a preparation method of a PC material, which comprises the following steps:
adding 65-83 parts of PC resin, 7-15 parts of bisphenol A-bis (diphenyl phosphate) and 10-20 parts of fiber into a double-screw extruder according to the mass parts for melting, wherein the total parts of the PC resin, the bisphenol A-bis (diphenyl phosphate) and the fiber are 100 parts;
extruding the obtained melt through a composite die head to prepare a PC material;
the composite die head is composed of a first die head and a second die head along the flowing extrusion direction of the melt, a first extrusion channel and a second extrusion channel which are communicated with each other and have collinear axes are respectively arranged in the first die head and the second die head, the first extrusion channel and the second extrusion channel are both cylindrical channels, the joint of the first extrusion channel and the second extrusion channel is a smooth arc transition section, and the inlet end of the first extrusion channel and the outlet end of the second extrusion channel are both horn-shaped with arc surfaces.
Further, the circular arc changeover portion includes first segmental arc and the second segmental arc that crooked opposite direction, first segmental arc with the first interior wall connection who extrudes the passageway is just tangent, the second segmental arc with the second extrudes the interior wall connection of passageway and tangent, first segmental arc with second segmental arc smooth connection.
Preferably, the R angle values of the first arc section and the second arc section are the same and are both 0.2-0.4 mm.
Further, the diameter of the second extrusion channel is 0.4-0.8mm larger than that of the first extrusion channel.
Further, the extrusion process also comprises the working procedures of water cooling, air drying, grain cutting and packaging.
Further, the fiber includes any one of natural fiber, glass fiber, or carbon fiber.
The invention also provides a PC material prepared by adopting the preparation method of any one of the above materials.
The special die head is adopted for preparing the PC material, so that the damage caused by the friction between the fiber and the die head in the production process and the strip breakage phenomenon caused by the abrupt drop of the melt strength are avoided, and the appearance and partial performance of the PC material are improved; in addition, due to the use of the die head, the abrasion of die head equipment is further reduced, the production efficiency is improved, and the feasibility of continuous production of PC materials is improved.
Drawings
FIG. 1 is a cross-sectional view of a composite die used in the preparation of PC material according to comparative example 1 of the present invention;
FIG. 2 is a sectional view of a composite die structure for preparing PC material in example 1 of the present invention.
In the figure: 10-a first die head, 20-a second die head, 30-an arc transition section, 101-a first extrusion channel, 201-a second extrusion channel, 301-a first arc section and 302-a second arc section.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the specific embodiments illustrated. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The first aspect of the present invention provides that 65 to 83 parts by mass of a PC resin, 7 to 15 parts by mass of a bisphenol a-bis (diphenyl phosphate) and 10 to 20 parts by mass of a fiber are fed to a twin-screw extruder and melted, wherein the total parts by mass of the PC resin, the bisphenol a-bis (diphenyl phosphate) and the fiber is 100 parts, it being understood that the processing temperature of the twin-screw extruder herein may be adjusted depending on the types of the matrix resin and the fiber, and thus, is not particularly limited herein;
extruding the obtained melt through a composite die head to prepare a PC material;
the composite die head is composed of a first die head and a second die head along the flowing extrusion direction of the melt, a first extrusion channel and a second extrusion channel which are communicated with each other and have collinear axes are respectively arranged in the first die head and the second die head, the first extrusion channel and the second extrusion channel are both cylindrical channels, the joint of the first extrusion channel and the second extrusion channel is a smooth arc transition section, and the inlet end of the first extrusion channel and the outlet end of the second extrusion channel are both horn-shaped with arc surfaces.
In the existing production process, in the extrusion process, the phenomenon that the outlet of a die head rubs resin, the orientation of fibers in the resin is changed, and even the fibers are broken by grinding exists, the fibers in a melt body are easily broken by a horn-shaped designed sharp corner part at the inlet of the die head, and the die head is easily worn, so that continuous production cannot be carried out; and the first extrusion channel and the second extrusion channel in the die head are directly connected, so that the melt strength of the PC material is sharply reduced in the processing process, and the defect of broken bars is easily caused. According to the invention, the improved composite die head is innovatively applied to the preparation process of the PC material, when the fiber enters the second extrusion channel from the first extrusion channel, the molten PC filled in the second extrusion channel can perform one-time integral lubrication coating on the periphery of the fiber, so that the appearance is smooth and flat, the inlet end (namely the feeding end) of the first extrusion channel is in a horn shape with an arc surface, the smooth entering of the fiber into the die head is facilitated, and the fiber and the die head cannot be damaged; the outlet end (namely the discharge end) of the second extrusion channel is also in the shape of a horn with an arc surface, so that the condition that the orientation of fibers in resin is changed or even broken due to the fact that the resin base material is rubbed with the die head because the traction direction is inconsistent with the direction of the open slot of the die hole can be avoided, and the mechanical property of the PC material is further influenced. Furthermore, the joint of the first extrusion channel and the second extrusion channel is a smooth arc transition section, so that the stable transition of the melt strength in the process of passing the melt through the first extrusion channel to the second extrusion channel can be realized, the defect of broken bars caused by the steep drop of the melt strength is avoided, and the prepared PC material has good appearance. It is to be understood that the kind of the PC resin, the bisphenol a-bis (diphenyl phosphate) and the fiber in the present invention is not particularly limited, and the PC resin, the bisphenol a-bis (diphenyl phosphate) and the fiber in the art may be all.
Further, the circular arc changeover portion includes first segmental arc and the second segmental arc that crooked opposite direction, first segmental arc with the first interior wall connection who extrudes the passageway is just tangent, the second segmental arc with the second extrudes the interior wall connection of passageway and tangent, first segmental arc with second segmental arc smooth connection.
Further, the R angle values of the first arc section and the second arc section can be adjusted according to the diameters of the first extrusion channel and the second extrusion channel, and preferably, in some embodiments of the present invention, the R angle values of the first arc section and the second arc section are the same and are both 0.2-0.4 mm.
Further, the diameter of the second extrusion channel and the diameter of the first extrusion channel of the composite die used in the preparation method can be selected conventionally in the field, and the diameter of the second extrusion channel is 0.4-0.8mm larger than the diameter of the first extrusion channel.
Further, after the extrusion, the processes of water cooling, air drying, granulating and packaging are also included, and it is understood that the processes of water cooling, air drying, granulating and packaging are all conventional processes in the art and are not specifically described herein.
Further, the fibers in the present invention mainly serve to reinforce the composite material, which may be selected from conventional choices in the art, and specifically, there may be mentioned, but not limited to, any one of natural fibers, glass fibers or carbon fibers.
The second aspect of the present invention also provides a PC material prepared by the method according to any one of the first aspect of the present invention.
The technical solution of the present invention will be more clearly and completely described below with reference to specific embodiments.
The PC resin used in the following examples and comparative examples was selected from the 1000R brand of SABIC, an import company;
the glass fiber is 510H mark of a boulder group;
the natural fiber is bleached jute yarn of Hangzhou Xiaoshan Jiawei hemp products Co., Ltd, and the specification is 3.7/2;
the carbon fiber is SYT49S of Zhongshenying hawk;
bisphenol A-bis (diphenyl phosphate) was FP-600 from Edaceae, Japan.
Examples
PC resin, bisphenol A-bis (diphenyl phosphate) and fibers were melted in the corresponding parts by mass in examples 1 to 3 of Table 1 in a twin-screw extruder having a processing temperature of: 250 ℃ in the first zone, 280 ℃ in the second zone, 280 ℃ in the third zone, 280 ℃ in the fourth zone, 270 ℃ in the fifth zone, 270 ℃ in the sixth zone, 270 ℃ in the seventh zone, 260 ℃ in the eighth zone, 260 ℃ in the ninth zone and 270 ℃ in the tenth zone;
and extruding the obtained melt through a composite die head, sequentially carrying out water cooling, air drying, compression roller and grain cutting to obtain the PC material, and observing by naked eyes to obtain the PC material with uniform, smooth and flat appearance and no burrs.
The structure of the adopted composite die head is shown in fig. 2, according to the flow extrusion direction of the molten melt, the composite die head is formed by fastening and connecting a first die head 10 and a second die head 20 by bolts, a first extrusion channel 101 and a second extrusion channel 201 which are mutually communicated and have collinear axes are respectively arranged inside the first die head 10 and the second die head 20, and the diameter of the second extrusion channel 201 is 0.5mm larger than that of the first extrusion channel 101 in the embodiment; the inlet end of the first extrusion channel 101 and the outlet end of the second extrusion channel 201 are both in the shape of a horn with a circular arc curved surface, and the joint of the first extrusion channel 101 and the second extrusion channel 201 is a smooth circular arc transition section 30. Specifically, the arc transition section 30 includes a first arc section 301 connected and tangent to the inner wall of the first extrusion channel 101, and a second arc section 302 connected and tangent to the inner wall of the second extrusion channel 201, and the first arc section 301 and the second arc section 302 are smoothly connected and have opposite bending directions. Furthermore, in the embodiment, the R-angle values of the first arc segment 301 and the second arc segment 302 are the same and are 0.25 mm. When the composite die head is used specifically, the composite die head is arranged at a discharge port of a fiber feeding device, fibers are fully mixed and soaked by the feeding device, PC resin and bisphenol A-bis (diphenyl phosphate), then enter the first extrusion channel 101 from an inlet end of the first extrusion channel 101 on the die head body, then enter the second extrusion channel 201 through the arc transition section 30 for fiber surface coating, and finally are extruded through an outlet end of the second extrusion channel 201.
Comparative example
In the preparation methods of the PC materials in comparative examples 1 to 3, compared with the examples, only the structure of the composite die is different, and the others are the same as the corresponding examples (see table 1 specifically), and the obtained PC materials have burrs and are not smooth and uneven in appearance.
The composite die head adopted in the comparative example has a structure shown in fig. 1, a die head body is composed of a first die head 10 and a second die head 20, a first extrusion channel 101 and a second extrusion channel 201 are respectively arranged in the first die head 10 and the second die head 20, the axes of the first extrusion channel 101 and the second extrusion channel 201 are collinear and are communicated with each other, the diameter of the second extrusion channel 201 is 0.5mm larger than that of the first extrusion channel 101, and the inlet end of the first extrusion channel 101 is horn-shaped.
TABLE 1 compositions and addition parts (parts by mass) of PC materials in examples and comparative examples
The PC materials prepared in the examples and comparative examples were respectively subjected to performance tests, and the results are shown in table 2.
TABLE 2 PC Material Performance test results
As can be seen from the test results in table 2, the mechanical properties of the PC material prepared by the preparation method are significantly improved compared to the comparative example, wherein, taking example 1 and comparative example 1 as examples, the tensile strength is increased to 133%, the bending strength is increased to 125%, the bending modulus is increased to 110%, and the izod notched impact strength is increased to 134%.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The preparation method of the PC material is characterized by comprising the following steps of:
adding 65-83 parts of PC resin, 7-15 parts of bisphenol A-bis (diphenyl phosphate) and 10-20 parts of fiber into a double-screw extruder according to the mass parts for melting, wherein the total parts of the PC resin, the bisphenol A-bis (diphenyl phosphate) and the fiber are 100 parts;
extruding the obtained melt through a composite die head to prepare a PC material;
the composite die head is composed of a first die head and a second die head along the flowing extrusion direction of the melt, a first extrusion channel and a second extrusion channel which are communicated with each other and have collinear axes are respectively arranged in the first die head and the second die head, the first extrusion channel and the second extrusion channel are both cylindrical channels, the joint of the first extrusion channel and the second extrusion channel is a smooth arc transition section, and the inlet end of the first extrusion channel and the outlet end of the second extrusion channel are both horn-shaped with arc surfaces.
2. The method of claim 1, wherein the arc transition section comprises a first arc section and a second arc section with opposite bending directions, the first arc section is connected and tangent with an inner wall of the first extrusion channel, the second arc section is connected and tangent with an inner wall of the second extrusion channel, and the first arc section and the second arc section are smoothly connected.
3. The method of claim 2, wherein the first arc segment and the second arc segment have the same R-angle value and are each 0.2-0.4 mm.
4. The method of claim 1, wherein the diameter of the second extrusion channel is 0.4 to 0.8mm greater than the diameter of the first extrusion channel.
5. The method of claim 1, wherein the extrusion further comprises the steps of water cooling, air drying, pelletizing and packaging.
6. The method of claim 1, wherein the fiber comprises any one of natural fiber, glass fiber, or carbon fiber.
7. A PC material produced by the production method according to any one of claims 1 to 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010675991 | 2020-07-14 | ||
| CN2020106759919 | 2020-07-14 |
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| CN112045967A true CN112045967A (en) | 2020-12-08 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102202852A (en) * | 2008-10-29 | 2011-09-28 | 拜尔材料科学股份公司 | Extrusion nozzle for polymers |
| CN202753378U (en) * | 2012-08-16 | 2013-02-27 | 合肥会通新材料有限公司 | Extruder combined type die head |
| CN106827448A (en) * | 2017-03-21 | 2017-06-13 | 四川业勃利亨桂骄明威管业有限公司 | A kind of steel plastic composite wound pipe band extruded mould |
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2020
- 2020-07-28 CN CN202010737288.6A patent/CN112045967A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102202852A (en) * | 2008-10-29 | 2011-09-28 | 拜尔材料科学股份公司 | Extrusion nozzle for polymers |
| CN202753378U (en) * | 2012-08-16 | 2013-02-27 | 合肥会通新材料有限公司 | Extruder combined type die head |
| CN106827448A (en) * | 2017-03-21 | 2017-06-13 | 四川业勃利亨桂骄明威管业有限公司 | A kind of steel plastic composite wound pipe band extruded mould |
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Application publication date: 20201208 |