CN111732796A - PVC (polyvinyl chloride) filling material with high flexural modulus and low cost and preparation method thereof - Google Patents
PVC (polyvinyl chloride) filling material with high flexural modulus and low cost and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
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- 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
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C2948/00—Indexing scheme relating to extrusion 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
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Abstract
The invention relates to the technical field of PVC (polyvinyl chloride) filling materials, and discloses a PVC filling material with high flexural modulus and low cost, which comprises the following components: 40-80 parts of PVC resin with the polymerization degree of 1000, 20-60 parts of PVC reclaimed materials, 0.5-3 parts of methyl tin stabilizer, 0.5-3 parts of magnesium-aluminum-zinc composite stabilizer, 1.5-5 parts of copolymer of methyl methacrylate and butyl acrylate, 4-9 parts of high-strength MBS, 12-20 parts of talcum powder, 0-15 parts of calcium carbonate, 1-3 parts of lubricant and 1-4 parts of pigment; also discloses a preparation method of the PVC filling material with high flexural modulus and low cost, which comprises the following steps: s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing; s2: cold mixing; s3: and extruding the materials. The PVC filling material disclosed by the invention is uniform in thickness distribution, low in surface gloss, low in cost, high in flexural modulus and excellent in durability.
Description
Technical Field
The invention relates to the technical field of PVC (polyvinyl chloride) filling materials, in particular to a PVC filling material with high flexural modulus and low cost and a preparation method thereof.
Background
At present, common packed towers comprise a cooling tower, a washing tower, an absorption tower and the like, the common packed towers have the functions of exchanging heat between cooling water carrying waste heat and air in the towers, so that the waste heat is transmitted to the air and is dispersed into the atmosphere, the cooling process of the water in the cooling tower is mainly carried out in the packing, the cooling effect of the cooling tower depends on the heat exchange performance of the packing to a great extent, the common packing mainly comprises materials such as metal, ceramic, plastic and the like, and the PVC packing is popular due to the characteristics of easy processing, light weight, good toughness and the like.
However, the common polyvinyl chloride packing is easy to deform due to low flexural modulus, and cannot meet the requirements of industrial production design, so that the normal operation of production is influenced. Aiming at the defects of the common PVC filler, the invention provides the PVC filling material with high flexural modulus, and the aims of high flexural modulus, deformation reduction, recycled material recovery and low cost are fulfilled.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a PVC filling material with high flexural modulus and low cost and a preparation method thereof, and mainly aims at the defects of common PVC filling materials, so that the PVC filling material achieves the purposes of high flexural modulus, deformation reduction, reclaimed material recovery and low cost.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
a high flexural modulus low cost PVC filler material, the composition comprising: 40-80 parts of PVC resin with the polymerization degree of 1000, 20-60 parts of PVC reclaimed materials, 0.5-3 parts of methyl tin stabilizer, 0.5-3 parts of magnesium-aluminum-zinc composite stabilizer, 1.5-5 parts of copolymer of methyl methacrylate and butyl acrylate, 4-9 parts of high-strength MBS, 12-20 parts of talcum powder, 0-15 parts of calcium carbonate, 1-3 parts of lubricant and 1-4 parts of pigment.
A preparation method of a PVC filling material with high flexural modulus and low cost comprises the following steps:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, PVC reclaimed materials, methyl tin stabilizer, magnesium-aluminum-zinc composite stabilizer, pigment, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS, talcum powder serving as lubricant and calcium carbonate;
s2: cold mixing, when the temperature of the materials is raised to 100-115 ℃, automatically discharging the materials into a cold mixer, stirring and cooling the materials, further uniformly mixing the materials, and when the temperature of the materials is cooled to 60-70 ℃, discharging the materials into a storage barrel;
s3: extruding the materials, feeding the cold-stirred and uniformly-mixed materials into a star-shaped screw extruder, heating the materials to ensure that the materials are extruded after being heated, sheared and plasticized;
s4: further plasticizing, wherein the extruded materials immediately enter an open mill after being extruded by an extruder, and are further plasticized;
s5: tabletting and forming, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting and forming;
s6: cooling and shaping, namely leading out the rolled product through a stretcher, and cooling and shaping;
s7: and (6) rolling, namely rolling the cooled and shaped material through a rolling machine.
As a further scheme of the invention, the copolymer of methyl methacrylate and butyl acrylate, the high-strength MBS, the talcum powder serving as the lubricant and the calcium carbonate in the S1 are put into a hot mixer under the high-speed operation.
Further, when the star-shaped screw extruder in S3 works, the temperature of the main screw is controlled at 120-150 ℃, and the rotating speed of the main machine is controlled at 50-60 rpm/min.
On the basis of the scheme, when the mixer works in the S4, the temperature of a rolling turbine is controlled to be 130-150 ℃ and the rotating speed is controlled to be 30-50RPM, and the material is plasticized in one step.
In still another embodiment of the present invention, the calendering temperature in the calendering in S5 is controlled at 180-190 ℃.
Furthermore, the cooling temperature is required to be kept at 10-30 ℃ when the cooling and shaping are carried out in S6, the temperature is controlled through a control module, the control module comprises a processor and a temperature sensor, the temperature is detected through the temperature sensor, and after the set temperature is reached, the processor controls each electric appliance to work.
(III) advantageous effects
Compared with the prior art, the invention provides the PVC filling material with high flexural modulus and low cost and the preparation method thereof, and the PVC filling material has the following beneficial effects:
1. the PVC filling material prepared by the process has the advantages of uniform thickness distribution, low surface gloss, low cost, high flexural modulus and excellent durability.
2. The sequential placement of the materials can prevent the reaction of the materials when mixing, which can affect the normal function.
3. The temperature is strictly controlled during hot-cold mixing, the star-shaped screw extruder is cooled after high-temperature mixing, the durability is improved, the temperature of the main screw is controlled to be 120-150 ℃ and the rotating speed of the main machine is 50-60rpm/min during working, and the extrusion quality is prevented from being influenced by overhigh temperature and overhigh rotating speed during working.
4. When the open mill works, the temperature of the rolling turbine is controlled to be 130-.
Drawings
FIG. 1 is a schematic flow structure diagram of a preparation method of a PVC filler material with high flexural modulus and low cost according to the present invention.
FIG. 2 is a table showing the product performance test of the preparation method of the PVC filler material with high flexural modulus and low cost according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A high flexural modulus low cost PVC filler material, the composition comprising: 40 parts of PVC resin with the polymerization degree of 1000, 60 parts of PVC reclaimed materials, 0.4 part of methyl tin stabilizer, 0.5 part of magnesium-aluminum-zinc composite stabilizer, 2 parts of copolymer of methyl methacrylate and butyl acrylate, 5 parts of high-strength MBS, 6 parts of talcum powder, 6 parts of calcium carbonate, 1.5 parts of lubricant and 1 part of pigment, and the used material cost is lower and the cost is strictly controlled.
Referring to fig. 1-2, a method for preparing a PVC packing material with high flexural modulus and low cost comprises the following steps:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, PVC reclaimed materials, methyl tin stabilizer, magnesium-aluminum-zinc composite stabilizer, pigment, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS, talcum powder serving as lubricant and calcium carbonate are sequentially put into the PVC resin, the PVC reclaimed materials, the methyl tin stabilizer, the magnesium-aluminum-zinc composite stabilizer, the pigment, the copolymer of methyl methacrylate and butyl acrylate, the high-strength MBS, the talcum powder serving as lubricant and the calcium carbonate, and the PVC resin, the PVC reclaimed;
s2: cold mixing, when the temperature of the materials is raised to 100-115 ℃, the materials are automatically discharged into a cold mixer, stirred and cooled and further uniformly mixed, when the temperature of the materials is cooled to 60-70 ℃, the materials are discharged into a storage barrel, the temperature is strictly controlled, and the materials are cooled after being mixed at high temperature, so that the durability is improved;
s3: extruding the materials, feeding the cold-stirred and uniformly-mixed materials into a star-shaped screw extruder, heating the materials to ensure that the materials are extruded after being heated, sheared and plasticized;
s4: further plasticizing, wherein the material enters an open mill immediately after being extruded by an extruder, and the extruded material is further plasticized, so that the high flexural modulus is improved;
s5: tabletting and forming, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting and forming;
s6: cooling and shaping, namely leading out the rolled product through a stretcher, and cooling and shaping;
s7: and (6) rolling, namely rolling the cooled and shaped material through a rolling machine.
In the invention, the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS, talcum powder as a lubricant and calcium carbonate in S1 are put in a thermal mixer under high-speed operation to enable the components to be rapidly mixed and prevent the components from being added in advance to influence the internal structure of the components, when a star-shaped screw extruder in S3 works, the temperature of a main screw is controlled to be 120-60 RPM/min, the rotating speed of a main machine is controlled to be 50-60RPM/min, the extrusion quality is prevented from being influenced by overhigh temperature and overhigh rotating speed during the working, the temperature of a rolling machine is controlled to be 130-150 ℃ and the rotating speed is controlled to be 30-50RPM during the working of the mixer in S4, the materials are further plasticized and fully plasticized, the durability is improved, the calendering temperature is controlled to be 180-190 ℃ during the calendering in S5, the calendering is carried out at high temperature to ensure the ductility, the cooling temperature is controlled to be 10-, through control module control temperature, control module includes treater and temperature sensor, detects the temperature through temperature sensor, reaches after the settlement temperature then through the work of each electrical apparatus of treater control, accurate control, improves product quality.
Example 2
A high flexural modulus low cost PVC filler material, the composition comprising: 40 parts of PVC resin with the polymerization degree of 1000, 60 parts of PVC reclaimed materials, 0.4 part of methyl tin stabilizer, 0.5 part of magnesium-aluminum-zinc composite stabilizer, 2 parts of copolymer of methyl methacrylate and butyl acrylate, 8 parts of high-strength MBS, 9 parts of talcum powder, 6 parts of calcium carbonate, 1.5 parts of lubricant and 1 part of pigment, and the used material cost is lower and the cost is strictly controlled.
Referring to fig. 1-2, a method for preparing a PVC packing material with high flexural modulus and low cost comprises the following steps:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, PVC reclaimed materials, methyl tin stabilizer, magnesium-aluminum-zinc composite stabilizer, pigment, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS, talcum powder serving as lubricant and calcium carbonate are sequentially put into the PVC resin, the PVC reclaimed materials, the methyl tin stabilizer, the magnesium-aluminum-zinc composite stabilizer, the pigment, the copolymer of methyl methacrylate and butyl acrylate, the high-strength MBS, the talcum powder serving as lubricant and the calcium carbonate, and the PVC resin, the PVC reclaimed;
s2: cold mixing, when the temperature of the materials is raised to 100-115 ℃, the materials are automatically discharged into a cold mixer, stirred and cooled and further uniformly mixed, when the temperature of the materials is cooled to 60-70 ℃, the materials are discharged into a storage barrel, the temperature is strictly controlled, and the materials are cooled after being mixed at high temperature, so that the durability is improved;
s3: extruding the materials, feeding the cold-stirred and uniformly-mixed materials into a star-shaped screw extruder, heating the materials to ensure that the materials are extruded after being heated, sheared and plasticized;
s4: further plasticizing, wherein the material enters an open mill immediately after being extruded by an extruder, and the extruded material is further plasticized, so that the high flexural modulus is improved;
s5: tabletting and forming, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting and forming;
s6: cooling and shaping, namely leading out the rolled product through a stretcher, and cooling and shaping;
s7: and (6) rolling, namely rolling the cooled and shaped material through a rolling machine.
In the invention, the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS, talcum powder as a lubricant and calcium carbonate in S1 are put in a thermal mixer under high-speed operation to enable the components to be rapidly mixed and prevent the components from being added in advance to influence the internal structure of the components, when a star-shaped screw extruder in S3 works, the temperature of a main screw is controlled to be 120-60 RPM/min, the rotating speed of a main machine is controlled to be 50-60RPM/min, the extrusion quality is prevented from being influenced by overhigh temperature and overhigh rotating speed during the working, the temperature of a rolling machine is controlled to be 130-150 ℃ and the rotating speed is controlled to be 30-50RPM during the working of the mixer in S4, the materials are further plasticized and fully plasticized, the durability is improved, the calendering temperature is controlled to be 180-190 ℃ during the calendering in S5, the calendering is carried out at high temperature to ensure the ductility, the cooling temperature is controlled to be 10-, through control module control temperature, control module includes treater and temperature sensor, detects the temperature through temperature sensor, reaches after the settlement temperature then through the work of each electrical apparatus of treater control, accurate control, improves product quality.
Example 3
A high flexural modulus low cost PVC filler material, the composition comprising: 80 parts of PVC resin with the polymerization degree of 1000, 20 parts of PVC reclaimed materials, 0.5 part of methyl tin stabilizer, 0.5 part of magnesium-aluminum-zinc composite stabilizer, 2.5 parts of copolymer of methyl methacrylate and butyl acrylate, 4 parts of high-strength MBS, 15 parts of talcum powder, 2 parts of lubricant and 2.5 parts of pigment, and the used materials have lower cost and strictly controlled cost.
Referring to fig. 1-2, a method for preparing a PVC packing material with high flexural modulus and low cost comprises the following steps:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, PVC reclaimed materials, methyl tin stabilizer, magnesium-aluminum-zinc composite stabilizer, pigment, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and talcum powder serving as lubricant are sequentially put into the PVC resin, the PVC reclaimed materials, the methyl tin stabilizer, the magnesium-aluminum-zinc composite stabilizer, the high-strength MBS and the talcum powder which can prevent the raw materials from reacting during mixing and influencing normal functions;
s2: cold mixing, when the temperature of the materials is raised to 100-115 ℃, the materials are automatically discharged into a cold mixer, stirred and cooled and further uniformly mixed, when the temperature of the materials is cooled to 60-70 ℃, the materials are discharged into a storage barrel, the temperature is strictly controlled, and the materials are cooled after being mixed at high temperature, so that the durability is improved;
s3: extruding the materials, feeding the cold-stirred and uniformly-mixed materials into a star-shaped screw extruder, heating the materials to ensure that the materials are extruded after being heated, sheared and plasticized;
s4: further plasticizing, wherein the material enters an open mill immediately after being extruded by an extruder, and the extruded material is further plasticized, so that the high flexural modulus is improved;
s5: tabletting and forming, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting and forming;
s6: cooling and shaping, namely leading out the rolled product through a stretcher, and cooling and shaping;
s7: and (6) rolling, namely rolling the cooled and shaped material through a rolling machine.
In the invention, the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant talcum powder in S1 are put in a thermal mixer under high-speed operation to enable the components to be quickly mixed and prevent the influence on the internal structure caused by adding the components in advance, the temperature of a main screw is controlled to be 150-, the control module comprises a processor and a temperature sensor, the temperature is detected through the temperature sensor, after the set temperature is reached, the processor controls the electric appliances to work, the control module is accurately controlled, and the product quality is improved.
Example 4
A high flexural modulus low cost PVC filler material, the composition comprising: 80 parts of PVC resin with the polymerization degree of 1000, 20 parts of PVC reclaimed materials, 0.5 part of methyl tin stabilizer, 0.5 part of magnesium-aluminum-zinc composite stabilizer, 3 parts of copolymer of methyl methacrylate and butyl acrylate, 4 parts of high-strength MBS, 17 parts of talcum powder, 2.5 parts of lubricant and 2.5 parts of pigment, and the used materials have lower cost and strictly controlled cost.
Referring to fig. 1-2, a method for preparing a PVC packing material with high flexural modulus and low cost comprises the following steps:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, PVC reclaimed materials, methyl tin stabilizer, magnesium-aluminum-zinc composite stabilizer, pigment, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and talcum powder serving as lubricant are sequentially put into the PVC resin, the PVC reclaimed materials, the methyl tin stabilizer, the magnesium-aluminum-zinc composite stabilizer, the high-strength MBS and the talcum powder which can prevent the raw materials from reacting during mixing and influencing normal functions;
s2: cold mixing, when the temperature of the materials is raised to 100-115 ℃, the materials are automatically discharged into a cold mixer, stirred and cooled and further uniformly mixed, when the temperature of the materials is cooled to 60-70 ℃, the materials are discharged into a storage barrel, the temperature is strictly controlled, and the materials are cooled after being mixed at high temperature, so that the durability is improved;
s3: extruding the materials, feeding the cold-stirred and uniformly-mixed materials into a star-shaped screw extruder, heating the materials to ensure that the materials are extruded after being heated, sheared and plasticized;
s4: further plasticizing, wherein the material enters an open mill immediately after being extruded by an extruder, and the extruded material is further plasticized, so that the high flexural modulus is improved;
s5: tabletting and forming, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting and forming;
s6: cooling and shaping, namely leading out the rolled product through a stretcher, and cooling and shaping;
s7: and (6) rolling, namely rolling the cooled and shaped material through a rolling machine.
In the invention, the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant talcum powder in S1 are put in a thermal mixer under high-speed operation to enable the components to be quickly mixed and prevent the influence on the internal structure caused by adding the components in advance, the temperature of a main screw is controlled to be 150-, the control module comprises a processor and a temperature sensor, the temperature is detected through the temperature sensor, after the set temperature is reached, the processor controls the electric appliances to work, the control module is accurately controlled, and the product quality is improved.
In the description herein, it is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A high flexural modulus low cost PVC filler material, characterized by the composition comprising: 40-80 parts of PVC resin with the polymerization degree of 1000, 20-60 parts of PVC reclaimed materials, 0.5-3 parts of methyl tin stabilizer, 0.5-3 parts of magnesium-aluminum-zinc composite stabilizer, 1.5-5 parts of copolymer of methyl methacrylate and butyl acrylate, 4-9 parts of high-strength MBS, 12-20 parts of talcum powder, 0-15 parts of calcium carbonate, 1-3 parts of lubricant and 1-4 parts of pigment.
2. The method for preparing the PVC filler material with high flexural modulus and low cost according to claim 1 is characterized by comprising the following steps:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, PVC reclaimed materials, methyl tin stabilizer, magnesium-aluminum-zinc composite stabilizer, pigment, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS, talcum powder serving as lubricant and calcium carbonate;
s2: cold mixing, when the temperature of the materials is raised to 100-115 ℃, automatically discharging the materials into a cold mixer, stirring and cooling the materials, further uniformly mixing the materials, and when the temperature of the materials is cooled to 60-70 ℃, discharging the materials into a storage barrel;
s3: extruding the materials, feeding the cold-stirred and uniformly-mixed materials into a star-shaped screw extruder, heating the materials to ensure that the materials are extruded after being heated, sheared and plasticized;
s4: further plasticizing, wherein the extruded materials immediately enter an open mill after being extruded by an extruder, and are further plasticized;
s5: tabletting and forming, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting and forming;
s6: cooling and shaping, namely leading out the rolled product through a stretcher, and cooling and shaping;
s7: and (6) rolling, namely rolling the cooled and shaped material through a rolling machine.
3. The method for preparing PVC filler material with high flexural modulus and low cost as claimed in claim 2, wherein the copolymer of methyl methacrylate and butyl acrylate, high strength MBS, talc as lubricant and calcium carbonate in S1 are put in a hot mixer under high speed operation.
4. The method as claimed in claim 2, wherein the temperature of the main screw is controlled at 120-150 ℃ and the rotation speed of the main machine is controlled at 50-60rpm/min when the star-screw extruder in S3 is operated.
5. The method as claimed in claim 2, wherein the temperature of the mill at S4 is controlled to be 130 ℃ and 150 ℃ and the rotation speed is controlled to be 30-50RPM, so as to plasticize the PVC filler in one step.
6. The method as claimed in claim 2, wherein the calendering temperature in the step of calendering in S5 is controlled at 190 ℃.
7. The method for preparing the PVC filling material with high flexural modulus and low cost according to claim 2, wherein the cooling temperature is required to be kept at 10-30 ℃ during the cooling and shaping in S6, the temperature is controlled by a control module, the control module comprises a processor and a temperature sensor, the temperature sensor detects the temperature, and after the set temperature is reached, the processor controls the electric appliances to work, so that the precision control is realized, and the product quality is improved.
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| CN113308069A (en) * | 2021-07-12 | 2021-08-27 | 成都津信塑料制品有限公司 | PVC renewable resource modified reclaimed material and preparation method thereof |
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Application publication date: 20201002 |