CN110564074A - Polyvinyl chloride regenerated plastic particles and preparation process thereof - Google Patents
Polyvinyl chloride regenerated plastic particles and preparation process thereof Download PDFInfo
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- CN110564074A CN110564074A CN201910835257.1A CN201910835257A CN110564074A CN 110564074 A CN110564074 A CN 110564074A CN 201910835257 A CN201910835257 A CN 201910835257A CN 110564074 A CN110564074 A CN 110564074A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08L27/02—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 not modified by chemical after-treatment
- C08L27/04—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 not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
the invention relates to a polyvinyl chloride regenerated plastic particle, which belongs to the technical field of regenerated plastic particles, and comprises the following raw materials, by weight, 45-60 parts of polyvinyl chloride waste, 20-30 parts of polyurethane elastomer, 1-4 parts of white carbon black, 15-27 parts of straw powder, 4-12 parts of styrene butadiene rubber, 2-5 parts of nano silicon dioxide, 3-8 parts of modified thickener, 4-9 parts of polyacrylonitrile fiber, 2-4 parts of calcium sulfate whisker, 0.5-3 parts of antioxidant, 0.5-2 parts of ultraviolet absorbent, 3-5 parts of toughener and 0.2-1.8 parts of dispersant; the invention also relates to a preparation process of the polyvinyl chloride regenerated plastic particles, which comprises the following steps: s1: preliminary mixing; s2: thickening; s3: adding an additive; s4: extruding and granulating; the regenerated plastic particles prepared by the method have excellent mechanical properties.
Description
Technical Field
the invention relates to the technical field of recycled plastic particles, in particular to a polyvinyl chloride recycled plastic particle and a preparation process thereof.
Background
At present, polyvinyl chloride plastic is one of common plastic materials in life, and the plastic products are generally treated in a landfill or incineration mode after being used, and the ecological environment is seriously damaged in any mode.
In order to reduce the influence of waste plastics on the ecological environment, the concept of reclaimed materials begins to appear. The reclaimed material is obtained by using waste plastic products and performing procedures such as sorting, cleaning, granulating and the like. But the waste plastics undergo the processes of thermal aging, light aging, oxidation and the like in the using process, and the mechanical property of the waste plastics is reduced to a certain degree compared with that of the waste plastics made of all new materials; in addition, because the sources of the waste plastics are unstable, the quality stability is poor, and the compatibility among the waste plastics is poor, the factors limit the application of the reclaimed materials.
therefore, there is an urgent need to develop a recycled plastic having excellent mechanical properties.
disclosure of Invention
The invention aims to provide a polyvinyl chloride recycled plastic particle which is excellent in mechanical property.
The above object of the present invention is achieved by the following technical solutions:
The polyvinyl chloride regenerated plastic particles comprise, by weight, 45-60 parts of polyvinyl chloride waste, 20-30 parts of polyurethane elastomer, 1-4 parts of white carbon black, 15-27 parts of straw powder, 4-12 parts of styrene butadiene rubber, 2-5 parts of nano silicon dioxide, 3-8 parts of modified thickener, 4-9 parts of polyacrylonitrile fiber, 2-4 parts of calcium sulfate whisker, 0.5-3 parts of antioxidant, 0.5-2 parts of ultraviolet absorbent, 3-5 parts of toughening agent and 0.2-1.8 parts of dispersant; the preparation process of the modified thickener comprises the following steps:
a: dissolving 4-12 parts of artemisia glue and 3-15 parts of chitosan in absolute ethyl alcohol, then dropwise adding a sodium hydroxide solution, and stirring for 25-30min to obtain a mixed solution A;
b: heating the temperature of the mixed solution A to 55-60 ℃, then adding 5.2-17.6 parts of chloroacetic acid crystals, stirring for 3-4h, cooling the mixed solution to room temperature, adding glacial acetic acid while stirring to adjust the pH value to 6.8-7.2, and obtaining mixed solution B;
c: and filtering the mixed solution B, washing the solid-phase product by using absolute ethyl alcohol, drying the solid-phase product at the temperature of 80-85 ℃, and grinding the solid-phase product into powder with the particle size of 30-45nm to obtain the modified thickening agent.
by adopting the technical scheme, the waste plastic undergoes an aging process before being recycled, and the impact resistance, the bending property and the tensile property of a regenerated product are all reduced due to degradation of macromolecular chains of the resin; in order to improve the impact resistance of the regenerated plastic particles, the polyurethane elastomer and the styrene-butadiene rubber are added into the raw materials for toughening modification, when the polyurethane elastomer and the polyvinyl chloride waste are subjected to melt blending, dispersed phase elastomer particles can play a role in passivating crack endpoints, so that stress can be uniformly distributed around the particles and dispersed, the aim of inhibiting crack development is fulfilled, the toughness of the polyvinyl chloride is also improved, the stress is buffered, and the internal defects caused by stress concentration of the polyvinyl chloride are reduced.
In order to further improve the toughening effect, the straw powder, the white carbon black, the nano silicon dioxide and the calcium sulfate crystal whisker are added for filling. The addition of the white carbon black and the calcium sulfate whisker can improve the tensile property and the impact strength of the regenerated plastic particles; the addition of the nano silicon dioxide not only has the enhancement effect on the aspect of mechanical property, but also can lead the regenerated plastic particles to show better heat resistance; the calcium sulfate whisker and the polyvinyl chloride waste have good substrate compatibility and interface cohesive force, when the calcium sulfate whisker and the polyvinyl chloride waste are matched to act together, the calcium sulfate whisker and the polyvinyl chloride waste have strong cohesive force, and the cohesive force between the straw powder, the white carbon black, the nano silicon dioxide and the substrate can be improved, so that the effect of reinforcement is achieved.
In addition, the raw material is also added with polyacrylonitrile fiber, compared with common fiber, the polyacrylonitrile fiber has higher elastic modulus, higher tensile strength, better ultraviolet resistance, high temperature resistance and cold resistance, and after the polyacrylonitrile fiber is added, the bending strength and the tensile property of the regenerated plastic can be obviously improved.
In order to improve the compatibility problem between polyacrylonitrile fibers, styrene butadiene rubber, polyurethane elastomer and polyvinyl chloride waste, a modified thickening agent is added into the raw materials, and the main raw materials of the modified thickening agent are artemisia glue and chitosan. Firstly, under an alkaline environment, both chitosan and artemisia glue can generate substances similar to alkali cellulose, and then the substances are reacted with chloroacetic acid, so that carboxymethyl can be introduced onto molecular chains of the chitosan and artemisia glue, the dispersibility of the chitosan and artemisia glue is enhanced, the chitosan and artemisia glue can better exert functions, the bonding force between polyvinyl chloride waste and other raw materials is improved, and the tensile property, the bending strength and the impact resistance of the regenerated plastic particles are improved.
The invention is further configured to: the weight part ratio of the polyvinyl chloride waste, the white carbon black, the nano silicon dioxide and the calcium sulfate whisker in the raw materials is 1: 0.03-0.06: 0.35-0.07: 0.35-0.65.
By adopting the technical scheme, the proportion of the white carbon black, the nano silicon dioxide, the sulfuric acid whisker and the polyvinyl chloride waste is strictly controlled so as to achieve the optimal filling effect.
the invention is further configured to: the weight portion ratio of the polyurethane elastomer, the butadiene styrene rubber, the modified thickening agent and the polyacrylonitrile fiber in the raw materials is 1: 0.30-0.45: 0.25-28: 0.20-0.40.
by adopting the technical scheme, the proportion of the polyurethane elastomer, the styrene butadiene rubber, the modified thickening agent and the polyacrylonitrile fiber is strictly controlled, so that the optimal toughening effect and compatibilization effect are achieved.
the invention is further configured to: the straw powder is one or more of wheat straw powder, rice straw powder, corn straw powder, rape straw powder and cotton straw powder.
the invention is further configured to: the antioxidant is one or more of antioxidant 264, antioxidant 1010, antioxidant 1070 and antioxidant TNP.
The invention is further configured to: the ultraviolet absorbent is 2-hydroxy-4-n-octoxy benzophenone.
the invention is further configured to: the toughening agent is methyl methacrylate-butadiene-styrene copolymer.
the invention is further configured to: the dispersing agent is selected from polyethylene glycol.
The second purpose of the invention is to provide a preparation process of polyvinyl chloride recycled plastic particles, which comprises the following steps: s1: preliminary mixing: mixing polyvinyl chloride waste, polyurethane elastomer, styrene butadiene rubber and polyacrylonitrile fiber at 170-180 ℃ and the rotating speed of 1200-1500 rpm for 30-35min to obtain a primary mixture A;
S2: thickening: adding the modified thickener into the mixture A, mixing at the temperature of 170-180 ℃ and the rotating speed of 1500-1600 rpm for 10-15min, adding the white carbon black, the straw powder, the nano silicon dioxide and the calcium sulfate whisker into the mixture, and continuously mixing for 5-10min to obtain a mixture B;
s3: adding an additive: adding an antioxidant, an ultraviolet absorbent, a toughening agent and a dispersing agent into the mixture B, and mixing at the temperature of 170-180 ℃ and the rotating speed of 1600-1700 rpm for 5-10min to obtain a final mixture;
S4: extruding and pelletizing: and extruding the final mixture into strips, and cutting the strips into granules to obtain the polyvinyl chloride regenerated plastic granules.
By adopting the technical scheme, after the polyvinyl chloride waste, the polyurethane elastomer, the styrene butadiene rubber and the polyacrylonitrile fiber are uniformly mixed, the modified thickening agent is added, so that the bonding force between the polyvinyl chloride waste and the polyurethane elastomer, between the styrene butadiene rubber and between the polyvinyl chloride waste and the polyacrylonitrile fiber is optimal, then the filling material is added, the mixture is further uniformly mixed, and finally various additives are added; the components are mutually matched for use, and the regenerated plastic particles with better mechanical property are obtained under the condition of melt blending.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the addition of the polyurethane elastomer, the styrene butadiene rubber and the filler can improve the toughness of the polyvinyl chloride and improve the tensile property and the impact strength of the recycled plastic;
2. Compared with common fibers, the polyacrylonitrile fibers have higher elastic modulus and higher tensile strength, have better reinforcing effect on polyvinyl chloride waste, and obviously improve the bending strength and tensile property of the regenerated plastic;
3. the artemisia glue and the chitosan can improve the interfacial adhesion between polyacrylonitrile fibers, polyurethane elastomers, styrene butadiene rubber and polyvinyl chloride, thereby being beneficial to further improving various mechanical properties of the regenerated plastic.
Detailed Description
Example 1
a preparation process of polyvinyl chloride recycled plastic particles comprises the following steps:
S1: preliminary mixing: according to the weight parts, 45 parts of polyvinyl chloride waste, 20 parts of polyurethane elastomer, 4 parts of styrene butadiene rubber and 4 parts of polyacrylonitrile fiber are mixed for 30min at the temperature of 170 ℃ at the rotating speed of 1200 rpm to obtain a primary mixture A;
S2: thickening: adding 3 parts of modified thickener into the mixture A, mixing at the temperature of 170 ℃ for 10min at the rotating speed of 1500 rpm, adding 1 part of white carbon black, 15 parts of wheat straw powder, 2 parts of nano silicon dioxide and 2 parts of calcium sulfate whisker into the mixture A, and continuously mixing for 5min to obtain a mixture B; the preparation process of the modified thickener comprises the following steps:
a: dissolving 4 parts of artemisia glue and 3 parts of chitosan in absolute ethyl alcohol, then dropwise adding a sodium hydroxide solution, and stirring for 25min to obtain a mixed solution A;
b: heating the temperature of the mixed solution A to 55 ℃, then adding 5.2 parts of chloroacetic acid crystals, stirring for 3 hours, cooling the mixed solution to room temperature, adding glacial acetic acid while stirring to adjust the pH value to 6.8, and obtaining mixed solution B;
c: and filtering the mixed solution B, washing the solid-phase product by using absolute ethyl alcohol, drying the solid-phase product at 80 ℃, and grinding the solid-phase product into powder with the particle size of 30nm to obtain the modified thickening agent.
S3: adding an additive: adding 0.5 part of antioxidant TNP, 0.5 part of 2-hydroxy-4-n-octoxybenzophenone, 3 parts of methyl methacrylate-butadiene-styrene copolymer and 0.2 part of polyethylene glycol into the mixture B, and mixing at 170 ℃ and 1600 revolutions per minute for 5min to obtain a final mixture;
s4: extruding and pelletizing: and extruding the final mixture into strips, and cutting the strips into granules to obtain the polyvinyl chloride regenerated plastic granules.
Example 2
A preparation process of polyvinyl chloride recycled plastic particles comprises the following steps:
s1: preliminary mixing: mixing 55 parts by weight of polyvinyl chloride waste, 25 parts by weight of polyurethane elastomer, 8 parts by weight of styrene-butadiene rubber and 7 parts by weight of polyacrylonitrile fiber at 175 ℃ for 32min at the rotating speed of 1350 revolutions per minute to obtain a primary mixture A;
s2: thickening: adding 5 parts of modified thickener into the mixture A, mixing at 175 ℃ for 12min at the rotating speed of 1550 rpm, adding 3 parts of white carbon black, 22 parts of rice straw powder, 3 parts of nano silicon dioxide and 3 parts of calcium sulfate whisker into the mixture A, and continuously mixing for 8min to obtain a mixture B; the preparation process of the modified thickener comprises the following steps:
a: dissolving 7 parts of artemisia glue and 8 parts of chitosan in absolute ethyl alcohol, then dropwise adding a sodium hydroxide solution, and stirring for 28min to obtain a mixed solution A;
b: heating the temperature of the mixed solution A to 58 ℃, adding 9.4 parts of chloroacetic acid crystals, stirring for 3.5 hours, cooling the mixed solution to room temperature, adding glacial acetic acid while stirring to adjust the pH value to 7.0, and obtaining mixed solution B;
c: and filtering the mixed solution B, washing the solid-phase product by using absolute ethyl alcohol, drying the solid-phase product at 82 ℃, and grinding the solid-phase product into powder with the particle size of 40nm to obtain the modified thickening agent.
S3: adding an additive: adding 1.8 parts of antioxidant TNP, 1.2 parts of 2-hydroxy-4-n-octoxybenzophenone, 4 parts of methyl methacrylate-butadiene-styrene copolymer and 1.3 parts of polyethylene glycol into the mixture B, and mixing at 175 ℃ at a rotating speed of 1650 rpm for 8min to obtain a final mixture;
S4: extruding and pelletizing: and extruding the final mixture into strips, and cutting the strips into granules to obtain the polyvinyl chloride regenerated plastic granules.
example 3
A preparation process of polyvinyl chloride recycled plastic particles comprises the following steps:
S1: preliminary mixing: mixing 60 parts of polyvinyl chloride waste, 30 parts of polyurethane elastomer, 12 parts of styrene butadiene rubber and 9 parts of polyacrylonitrile fiber at 180 ℃ at a rotating speed of 1500 revolutions per minute for 35min to obtain a primary mixture A;
S2: thickening: adding 8 parts of modified thickener into the mixture A, mixing for 15min at 180 ℃ at a rotating speed of 1600 rpm, adding 4 parts of white carbon black, 27 parts of corn straw powder, 5 parts of nano silicon dioxide and 4 parts of calcium sulfate whisker, and continuously mixing for 10min to obtain a mixture B; the preparation process of the modified thickener comprises the following steps:
a: dissolving 12 parts of artemisia glue and 15 parts of chitosan in absolute ethyl alcohol, then dropwise adding a sodium hydroxide solution, and stirring for 30min to obtain a mixed solution A;
b: heating the temperature of the mixed solution A to 60 ℃, then adding 17.6 parts of chloroacetic acid crystals, stirring for 4 hours, cooling the mixed solution to room temperature, adding glacial acetic acid while stirring to adjust the pH value to 7.2, and obtaining mixed solution B;
c: and filtering the mixed solution B, washing the solid-phase product by using absolute ethyl alcohol, drying the solid-phase product at 85 ℃, and grinding the solid-phase product into powder with the particle size of 45nm to obtain the modified thickening agent.
S3: adding an additive: adding 3 parts of antioxidant TNP, 2 parts of 2-hydroxy-4-n-octoxybenzophenone, 5 parts of methyl methacrylate-butadiene-styrene copolymer and 1.8 parts of polyethylene glycol into the mixture B, and mixing at 180 ℃ at a rotation speed of 1700 rpm for 10min to obtain a final mixture;
s4: extruding and pelletizing: and extruding the final mixture into strips, and cutting the strips into granules to obtain the polyvinyl chloride regenerated plastic granules.
Example 4
The preparation process of the recycled polyvinyl chloride plastic particles is different from the preparation process of the example 2 in that: the weight portion ratio of the polyvinyl chloride waste, the white carbon black, the nano silicon dioxide and the calcium sulfate whisker in the raw materials is 1: 0.03: 0.35: 0.35.
Example 5
The preparation process of the recycled polyvinyl chloride plastic particles is different from the preparation process of the example 2 in that: the weight portion ratio of the polyvinyl chloride waste, the white carbon black, the nano silicon dioxide and the calcium sulfate whisker in the raw materials is 1: 0.06: 0.07: 0.65.
Example 6
the preparation process of the recycled polyvinyl chloride plastic particles is different from the preparation process of the example 2 in that: the weight portion ratio of the polyurethane elastomer, the butadiene styrene rubber, the modified thickening agent and the polyacrylonitrile fiber in the raw materials is 1: 0.30: 0.25: 0.20.
example 7
the preparation process of the recycled polyvinyl chloride plastic particles is different from the preparation process of the example 2 in that: the weight portion ratio of the polyurethane elastomer, the butadiene styrene rubber, the modified thickening agent and the polyacrylonitrile fiber in the raw materials is 1: 0.45: 28: 0.40.
Comparative example 1
The difference from example 2 is that no modified thickener was added in step S2.
Mechanical property detection was performed on examples 1-7 and comparative example 1 according to the technical index of national standard GB 8815-88, and the detection results are shown in tables 1 and 2 (wherein the temperature of thermal aging is 150 ℃ and the time is 72 h).
TABLE 1 results of mechanical Properties measurements of examples 1 to 4
TABLE 2 results of mechanical Properties measurements of examples 5 to 7 and comparative example 1
And (4) conclusion:
it can be seen from tables 1 and 2 that the performance tests of the recycled plastic granules prepared in examples 1-7 all meet the technical indexes of national standard GB 8815-88, and compared with comparative example 1, it can be seen that, after the modified thickener is added, the tensile strength, impact strength, elongation at break, tensile strength after aging, elongation at break after aging, and the like of the plastic granules all have better detection results, while the corresponding detection results in comparative example 1 reach the standard, but the effect is not obvious, which indicates that the modified thickener can improve the mechanical properties of the recycled plastic granules when being matched with polyurethane elastomer, styrene-butadiene rubber, polypropylene fiber and filling materials.
Examples 4 to 5 are different from example 2 in that the weight part ratios of the polyvinyl chloride waste, the white carbon black, the nano silica, and the calcium sulfate whisker are different, the white carbon black, the nano silica, and the calcium sulfate whisker are all fillers, the detection results of examples 4 to 5 are better than those of examples 1 and 3, and are lower than those of example 2, which shows that the weight part ratio of the polyvinyl chloride waste, the white carbon black, the nano silica, and the calcium sulfate whisker is 1: 0.03-0.06: 0.35-0.07: 0.35-0.65, the filling effect on the polyvinyl chloride waste is best.
Examples 6 to 7 are different from example 2 in that the weight ratio of the polyurethane elastomer, the styrene-butadiene rubber, the modified thickener and the polyacrylonitrile fiber is further limited, and the polyurethane elastomer and the styrene-butadiene rubber can toughen and modify the polyvinyl chloride waste; the addition of the polyacrylonitrile fiber can improve the tensile property of the regenerated plastic particles; the compatibility problem of the polyurethane elastomer, the styrene-butadiene rubber and the polyacrylonitrile fiber with the polyvinyl chloride waste with unknown sources can be solved by adding the modified thickening agent so as to improve the adhesive force of the interface between the polyvinyl chloride waste and other raw materials and improve the comprehensive performance of the regenerated plastic particles. The detection results of the examples 6 to 7 are better than those of the examples 1 and 3 and lower than those of the example 2, and the weight part ratio of the polyurethane elastomer, the styrene-butadiene rubber, the modified thickening agent and the polyacrylonitrile fiber is 1: 0.30-0.45: 0.25-28: the best effect is obtained when the concentration is 0.20-0.40.
In the comparative example 1, no modified thickener is added, the detection result is generally lower than the data in the examples 1 to 7, the importance of the modified thickener is proved again, and in combination with other data, it can be seen that the regenerated plastic particles with excellent mechanical properties are obtained by adding various fillers, polyurethane elastomer, styrene butadiene rubber, polyacrylonitrile fiber and the modified thickener into the raw materials.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the principles of the present invention should be covered by the protection scope of the present invention.
Claims (9)
1. A polyvinyl chloride recycled plastic particle is characterized in that: the raw materials comprise, by weight, 45-60 parts of polyvinyl chloride waste, 20-30 parts of polyurethane elastomer, 1-4 parts of white carbon black, 15-27 parts of straw powder, 4-12 parts of styrene butadiene rubber, 2-5 parts of nano silicon dioxide, 3-8 parts of modified thickening agent, 4-9 parts of polyacrylonitrile fiber, 2-4 parts of calcium sulfate whisker, 0.5-3 parts of antioxidant, 0.5-2 parts of ultraviolet absorbent, 3-5 parts of toughening agent and 0.2-1.8 parts of dispersing agent;
The preparation process of the modified thickener comprises the following steps:
a: dissolving 4-12 parts of artemisia glue and 3-15 parts of chitosan in absolute ethyl alcohol, then dropwise adding a sodium hydroxide solution, and stirring for 25-30min to obtain a mixed solution A;
b: heating the temperature of the mixed solution A to 55-60 ℃, then adding 5.2-17.6 parts of chloroacetic acid crystals, stirring for 3-4h, cooling the mixed solution to room temperature, adding glacial acetic acid while stirring to adjust the pH value to 6.8-7.2, and obtaining mixed solution B;
c: and filtering the mixed solution B, washing the solid-phase product by using absolute ethyl alcohol, drying the solid-phase product at the temperature of 80-85 ℃, and grinding the solid-phase product into powder with the particle size of 30-45nm to obtain the modified thickening agent.
2. a recycled polyvinyl chloride plastic pellet as claimed in claim 1, wherein said recycled polyvinyl chloride plastic pellet comprises: the weight part ratio of the polyvinyl chloride waste, the white carbon black, the nano silicon dioxide and the calcium sulfate whisker in the raw materials is 1: 0.03-0.06: 0.35-0.07: 0.35-0.65.
3. The recycled polyvinyl chloride plastic granules as claimed in claim 1, wherein: the weight portion ratio of the polyurethane elastomer, the butadiene styrene rubber, the modified thickening agent and the polyacrylonitrile fiber in the raw materials is 1: 0.30-0.45: 0.25-28: 0.20-0.40.
4. The recycled polyvinyl chloride plastic granules as claimed in claim 1, wherein: the straw powder is one or more of wheat straw powder, rice straw powder, corn straw powder, rape straw powder and cotton straw powder.
5. The recycled polyvinyl chloride plastic granules as claimed in claim 1, wherein: the antioxidant is one or more of antioxidant 264, antioxidant 1010, antioxidant 1070 and antioxidant TNP.
6. The recycled polyvinyl chloride plastic granules as claimed in claim 1, wherein: the ultraviolet absorbent is 2-hydroxy-4-n-octoxy benzophenone.
7. the recycled polyvinyl chloride plastic granules as claimed in claim 1, wherein: the toughening agent is methyl methacrylate-butadiene-styrene copolymer.
8. the recycled polyvinyl chloride plastic granules as claimed in claim 1, wherein: the dispersing agent is selected from polyethylene glycol.
9. the process for preparing recycled plastic granules of polyvinyl chloride according to any one of claims 1 to 8, wherein the process comprises the following steps: the method comprises the following steps:
s1: preliminary mixing: mixing polyvinyl chloride waste, polyurethane elastomer, styrene butadiene rubber and polyacrylonitrile fiber at 170-180 ℃ and the rotating speed of 1200-1500 rpm for 30-35min to obtain a primary mixture A;
s2: thickening: adding the modified thickener into the mixture A, mixing at the temperature of 170-180 ℃ and the rotating speed of 1500-1600 rpm for 10-15min, adding the white carbon black, the straw powder, the nano silicon dioxide and the calcium sulfate whisker into the mixture, and continuously mixing for 5-10min to obtain a mixture B;
s3: adding an additive: adding an antioxidant, an ultraviolet absorbent, a toughening agent and a dispersing agent into the mixture B, and mixing at the temperature of 170-180 ℃ and the rotating speed of 1600-1700 rpm for 5-10min to obtain a final mixture;
S4: extruding and pelletizing: and extruding the final mixture into strips, and cutting the strips into granules to obtain the polyvinyl chloride regenerated plastic granules.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114456479A (en) * | 2022-02-22 | 2022-05-10 | 泉州广兴塑胶制品有限责任公司 | Preparation method of antistatic modified recycled plastic particles |
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| JP2006124509A (en) * | 2004-10-28 | 2006-05-18 | Inoac Corp | Upholstery material for automobile interior |
| CN108285594A (en) * | 2017-12-20 | 2018-07-17 | 博硕科技(江西)有限公司 | High-elastic wear-resistant polyvinyl chloride coated material and preparation method thereof |
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Application publication date: 20191213 |
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