CN113715191A - Preparation method of special material for recycled plastic particles of non-woven fabric - Google Patents
Preparation method of special material for recycled plastic particles of non-woven fabric Download PDFInfo
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- CN113715191A CN113715191A CN202111003868.3A CN202111003868A CN113715191A CN 113715191 A CN113715191 A CN 113715191A CN 202111003868 A CN202111003868 A CN 202111003868A CN 113715191 A CN113715191 A CN 113715191A
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- 239000002245 particle Substances 0.000 title claims abstract description 59
- 239000000463 material Substances 0.000 title claims abstract description 33
- 229920003023 plastic Polymers 0.000 title claims abstract description 32
- 239000004033 plastic Substances 0.000 title claims abstract description 32
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 235000011888 snacks Nutrition 0.000 claims abstract description 32
- 238000004140 cleaning Methods 0.000 claims abstract description 26
- 239000004743 Polypropylene Substances 0.000 claims abstract description 22
- -1 polypropylene Polymers 0.000 claims abstract description 22
- 229920001155 polypropylene Polymers 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 9
- 239000000428 dust Substances 0.000 claims abstract description 8
- 238000005469 granulation Methods 0.000 claims abstract description 8
- 230000003179 granulation Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 22
- 229920000426 Microplastic Polymers 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 21
- 239000003599 detergent Substances 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- 239000012745 toughening agent Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 230000002950 deficient Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 239000002759 woven fabric Substances 0.000 abstract description 2
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B2017/001—Pretreating the materials before recovery
- B29B2017/0015—Washing, rinsing
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0268—Separation of metals
- B29B2017/0272—Magnetic separation
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0279—Optical identification, e.g. cameras or spectroscopy
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0286—Cleaning means used for separation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a preparation method of a special material for recycled plastic particles of non-woven fabrics, which comprises the following steps: step one, recycling and sorting the waste lunch boxes; step two, crushing the selected polypropylene lunch box; thirdly, removing and purifying dust and debris in the crushing process; step four, cleaning and decontaminating the crushed particles; step five, drying the cleaned particles; and step six, adding an auxiliary agent into the dried particles for improvement and granulation. The invention improves the repeated utilization rate of resources and reduces the production cost; through the detection of an infrared spectrum analyzer above the assembly line body, the polypropylene snack box is blown into the collection box through an air nozzle at one side of the assembly line body, and the transparent snack box suitable for non-woven fabrics can be sorted out; the reclaimed materials have few impurities in the subsequent production of the non-woven fabric, are not easy to block meshes, have good fluidity, are not easy to break filaments and holes, are not easy to produce defective products in the woven fabric, and improve the quality of the non-woven fabric.
Description
Technical Field
The invention relates to the field of plastic recovery, in particular to a preparation method of a special material for recycled plastic particles of non-woven fabrics.
Background
The plastic brings convenience and benefits to life and production of people and simultaneously produces a great deal of pollution. There are data showing that about 70% to 80% of the total amount of plastic in general will be converted into waste plastic in 10 years, of which 50% will be converted into waste plastic in 2 years. These waste plastics are discarded and disposed of improperly by people, causing great harm to the environment, and people call them "white pollution".
At present, the disposable transparent lunch box has large elimination amount every day, most of other garbage is burned, the resource is wasted, and the environment is polluted; the quality of the recycled pellets determines its application and not all recycled transparent lunch boxes can be used in non-woven fabrics.
Disclosure of Invention
The invention aims to solve the problems and provide a preparation method of a material special for recycled plastic particles of non-woven fabrics.
The invention realizes the purpose through the following technical scheme:
a preparation method of a special material for recycled plastic particles of non-woven fabrics comprises the following steps:
step one, recovery and sorting: placing the abandoned snack boxes on the assembly line body, detecting by an infrared spectrum analyzer above the assembly line body, and blowing the snack boxes made of polypropylene materials into the collection box through air nozzles on one side of the assembly line body;
step two, crushing: putting the selected polypropylene snack box into a crusher to crush so that the snack box is crushed into particles with the size of 5-10 cm;
step three, purification: a negative pressure suction machine is connected to the crusher in the crushing process, dust and fiber debris in the crushing process are sucked and separated, and meanwhile, iron removal treatment is carried out on particles through an electromagnetic iron remover;
step four, cleaning: placing the crushed particles in a water bath, adjusting the temperature of the water bath to 40-50 ℃, adding a detergent into the water bath, uniformly stirring, cleaning oil stains on the surfaces of the crushed particles, and cleaning the crushed particles by using clear water;
step five, drying: putting the cleaned plastic particles into a horizontal air dryer to remove water;
step six, granulation: and D, putting 85-100 parts of the dried plastic granules obtained in the step five for later use, namely, putting 85-100 parts of the recovered polypropylene plastic granules, 6-10 parts of a toughening agent, 3-5 parts of a compatilizer and 5-8 parts of a molecular regulator into a continuous mixing machine for mixing for 20-30min, and then melting, plasticizing and granulating the mixed materials in a double-screw extruder, wherein the temperatures of the first zone to the eighth zone of the extruder and the temperature of a machine head are respectively 150 ℃, 165 ℃, 175 ℃, 190 ℃, 200 ℃, 215 ℃, 225 ℃, 240 ℃, 245 ℃ and the rotation speed of a screw is 120-150r/min, so as to obtain the regenerated plastic granules.
Preferably, the line body in the first step is a horizontal conveyer belt, and the moving speed is 1-1.5 m/min.
Preferably, the rotating speed of the cutter shaft of the pulverizer in the second step is 500-750 r/min.
Preferably, in the fourth step, the adding concentration of the detergent is 30-40%, the stirring and cleaning time is 4-5 hours, and the cleaning with clear water is at least divided into two times.
Preferably, the temperature of the air in the horizontal air dryer in the fifth step is controlled to be 40-60 ℃, and the air speed is controlled to be 1-1.5 m/s.
Preferably, the stirring speed of the mixing mill in the sixth step is 300-.
The invention has the following advantages:
the repeated utilization rate of resources is improved, and the production cost is reduced; through the detection of an infrared spectrum analyzer above the assembly line body, the polypropylene snack box is blown into the collection box through an air nozzle at one side of the assembly line body, and the transparent snack box suitable for non-woven fabrics can be sorted out; the reclaimed materials have few impurities in the subsequent production of the non-woven fabric, are not easy to block meshes, have good fluidity, are not easy to break filaments and holes, are not easy to generate defective products in the woven fabric, and improve the quality of the non-woven fabric; recycling application is carried out through recycling, and high-value application is carried out through modification.
Detailed Description
The present invention will be further described with reference to specific examples, but the present invention is not limited to these examples.
Example 1:
a preparation method of a special material for recycled plastic particles of non-woven fabrics comprises the following steps:
step one, recovery and sorting: placing the abandoned snack boxes on a flow line body with the line speed of 1m/min, detecting by an infrared spectrum analyzer above the flow line body, and blowing the snack boxes made of polypropylene materials into the collection box through an air tap at one side of the flow line body;
step two, crushing: putting the selected polypropylene snack box into a crusher with a cutter shaft rotating speed of 500r/min for crushing, so that the snack box is crushed into particles with the size of 5-10 cm;
step three, purification: a negative pressure suction machine is connected to the crusher in the crushing process, dust and fiber debris in the crushing process are sucked and separated, and meanwhile, iron removal treatment is carried out on particles through an electromagnetic iron remover;
step four, cleaning: placing the crushed particles in a water bath, adjusting the temperature of the water bath to 40 ℃, adding a detergent into the water bath, uniformly stirring to ensure that the adding concentration of the detergent is 30%, stirring the liquid for 4-5 hours, cleaning oil stains on the surfaces of the crushed particles, and cleaning the cleaned plastic particles by using clean water for at least two times;
step five, drying: putting the cleaned plastic particles into a horizontal air dryer with the air temperature controlled at 40 ℃ and the air speed controlled at 1m/s for drying moisture;
step six, granulation: and D, putting 85 parts of the dried plastic granules obtained in the fifth step, 6 parts of toughening agent, 3 parts of compatilizer and 5 parts of molecular regulator into a continuous mixing roll in parts by weight, mixing for 20min at the mixing temperature of 90 ℃ and at the stirring speed of 300r/min, and then melting, plasticizing and granulating the mixed materials in a double-screw extruder, wherein the temperatures of the first zone to the eighth zone of the extruder and the temperature of a machine head are respectively 150 ℃, 165 ℃, 175 ℃, 190 ℃, 200 ℃, 215 ℃, 225 ℃ and 240 ℃, the temperature of the machine head is 245 ℃, and the screw rotation speed is 120r/min, so as to obtain the regenerated plastic granules.
Example 2:
a preparation method of a special material for recycled plastic particles of non-woven fabrics comprises the following steps:
step one, recovery and sorting: placing the abandoned snack boxes on a flow line body with the line speed of 1.5m/min, detecting by an infrared spectrum analyzer above the flow line body, and blowing the snack boxes made of polypropylene materials into the collection box through air nozzles on one side of the flow line body;
step two, crushing: putting the selected polypropylene snack box into a crusher with a cutter shaft rotating speed of 750r/min for crushing, so that the snack box is crushed into particles with the size of 5-10 cm;
step three, purification: a negative pressure suction machine is connected to the crusher in the crushing process, dust and fiber debris in the crushing process are sucked and separated, and meanwhile, iron removal treatment is carried out on particles through an electromagnetic iron remover;
step four, cleaning: placing the crushed particles in a water bath, adjusting the temperature of the water bath to 45 ℃, adding a detergent into the water bath, uniformly stirring to ensure that the adding concentration of the detergent is 35%, stirring the liquid for 4-5 hours, cleaning oil stains on the surfaces of the crushed particles, and cleaning the cleaned plastic particles by using clean water for at least two times;
step five, drying: putting the cleaned plastic particles into a horizontal air dryer with the air temperature controlled at 45 ℃ and the air speed controlled at 1.2m/s for drying moisture;
step six, granulation: and D, putting 90 parts of the dried plastic granules obtained in the fifth step for later use, namely putting 90 parts of recycled polypropylene plastic granules, 7 parts of toughening agent, 5 parts of compatilizer and 6 parts of molecular regulator into a continuous mixing roll according to parts by weight, mixing for 20min at the mixing temperature of 100 ℃ and the stirring speed of 350r/min, and then melting, plasticizing and granulating the mixed materials in a double-screw extruder, wherein the temperatures of the first zone to the eighth zone of the extruder and the temperature of a machine head are respectively 150 ℃, 165 ℃, 175 ℃, 190 ℃, 200 ℃, 215 ℃, 225 ℃ and 240 ℃, the temperature of the machine head is 245 ℃, and the rotating speed of a screw is 120r/min, so as to obtain the regenerated plastic granules.
Example 3:
a preparation method of a special material for recycled plastic particles of non-woven fabrics comprises the following steps:
step one, recovery and sorting: placing the abandoned snack boxes on a flow line body with the line speed of 1.2m/min, detecting by an infrared spectrum analyzer above the flow line body, and blowing the snack boxes made of polypropylene materials into the collection box through air nozzles on one side of the flow line body;
step two, crushing: putting the selected polypropylene snack box into a crusher with a cutter shaft rotating speed of 650r/min for crushing, so that the snack box is crushed into particles with the size of 5-10 cm;
step three, purification: a negative pressure suction machine is connected to the crusher in the crushing process, dust and fiber debris in the crushing process are sucked and separated, and meanwhile, iron removal treatment is carried out on particles through an electromagnetic iron remover;
step four, cleaning: placing the crushed particles in a water bath, adjusting the temperature of the water bath to 50 ℃, adding a detergent into the water bath, uniformly stirring to ensure that the adding concentration of the detergent is 35%, stirring the liquid for 4-5 hours, cleaning oil stains on the surfaces of the crushed particles, and cleaning the cleaned plastic particles by using clean water for at least two times;
step five, drying: putting the cleaned plastic particles into a horizontal air dryer with the air temperature controlled at 60 ℃ and the air speed controlled at 1.5m/s for drying moisture;
step six, granulation: and D, putting 90 parts of the dried plastic granules obtained in the fifth step for later use, namely putting 90 parts of recycled polypropylene plastic granules, 8 parts of toughening agent, 4 parts of compatilizer and 7 parts of molecular regulator into a continuous mixing roll according to parts by weight, mixing for 30min at the mixing temperature of 95 ℃ and the stirring speed of 450r/min, and then melting, plasticizing and granulating the mixed materials in a double-screw extruder, wherein the temperatures of the first zone to the eighth zone of the extruder and the temperature of a machine head are respectively 150 ℃, 165 ℃, 175 ℃, 190 ℃, 200 ℃, 215 ℃, 225 ℃ and 240 ℃, the temperature of the machine head is 245 ℃, and the screw rotating speed is 140r/min, so as to obtain the regenerated plastic granules. .
Example 4:
a preparation method of a special material for recycled plastic particles of non-woven fabrics comprises the following steps:
step one, recovery and sorting: placing the abandoned snack boxes on a flow line body with the line speed of 1.2m/min, detecting by an infrared spectrum analyzer above the flow line body, and blowing the snack boxes made of polypropylene materials into the collection box through air nozzles on one side of the flow line body;
step two, crushing: putting the selected polypropylene snack box into a crusher with a cutter shaft rotating speed of 700r/min for crushing, so that the snack box is crushed into particles with the size of 5-10 cm;
step three, purification: a negative pressure suction machine is connected to the crusher in the crushing process, dust and fiber debris in the crushing process are sucked and separated, and meanwhile, iron removal treatment is carried out on particles through an electromagnetic iron remover;
step four, cleaning: placing the crushed particles in a water bath, adjusting the temperature of the water bath to 40 ℃, adding a detergent into the water bath, uniformly stirring to ensure that the adding concentration of the detergent is 35%, stirring the liquid for 4-5 hours, cleaning oil stains on the surfaces of the crushed particles, and cleaning the cleaned plastic particles by using clean water for at least two times;
step five, drying: putting the cleaned plastic particles into a horizontal air dryer with the air temperature controlled at 55 ℃ and the air speed controlled at 1.5m/s for drying moisture;
step six, granulation: and (4) putting 95 parts of recycled polypropylene plastic particles, 10 parts of toughening agent, 4 parts of compatilizer and 6 parts of molecular regulator into a continuous mixing roll in parts by weight, mixing for 25min at the mixing temperature of 110 ℃ and at the stirring speed of 400r/min, and then melting, plasticizing and granulating the mixed materials in a double-screw extruder, wherein the temperatures of the first zone to the eighth zone of the extruder and the head temperature of the extruder are respectively 150 ℃, 165 ℃, 175 ℃, 190 ℃, 200 ℃, 215 ℃, 225 ℃ and 240 ℃, the head temperature of the extruder is 245 ℃, and the screw rotation speed is 150r/min, so as to obtain the regenerated plastic particles.
Example 5:
a preparation method of a special material for recycled plastic particles of non-woven fabrics comprises the following steps:
step one, recovery and sorting: placing the abandoned snack boxes on a flow line body with the line speed of 1.5m/min, detecting by an infrared spectrum analyzer above the flow line body, and blowing the snack boxes made of polypropylene materials into the collection box through air nozzles on one side of the flow line body;
step two, crushing: putting the selected polypropylene snack box into a crusher with a cutter shaft rotating speed of 750r/min for crushing, so that the snack box is crushed into particles with the size of 5-10 cm;
step three, purification: a negative pressure suction machine is connected to the crusher in the crushing process, dust and fiber debris in the crushing process are sucked and separated, and meanwhile, iron removal treatment is carried out on particles through an electromagnetic iron remover;
step four, cleaning: placing the crushed particles in a water bath, adjusting the temperature of the water bath to 50 ℃, adding a detergent into the water bath, uniformly stirring to ensure that the adding concentration of the detergent is 40%, stirring the liquid for 4-5 hours, cleaning oil stains on the surfaces of the crushed particles, and cleaning the cleaned plastic particles by using clean water for at least two times;
step five, drying: putting the cleaned plastic particles into a horizontal air dryer with the air temperature controlled at 60 ℃ and the air speed controlled at 1.5m/s for drying moisture;
step six, granulation: and C, putting 100 parts of the dried plastic granules obtained in the fifth step, 10 parts of toughening agent, 5 parts of compatilizer and 8 parts of molecular regulator into a continuous mixing roll in parts by weight, mixing for 30min at the mixing temperature of 110 ℃ and at the stirring speed of 500r/min, and then melting, plasticizing and granulating the mixed materials in a double-screw extruder, wherein the temperatures of the first zone to the eighth zone of the extruder and the temperature of a machine head are respectively 150 ℃, 165 ℃, 175 ℃, 190 ℃, 200 ℃, 215 ℃, 225 ℃ and 240 ℃, the temperature of the machine head is 245 ℃, and the screw rotation speed is 150r/min, so as to obtain the regenerated plastic granules.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (6)
1. A preparation method of a special material for recycled plastic particles of non-woven fabrics is characterized by comprising the following steps: the method comprises the following steps:
step one, recovery and sorting: placing the abandoned snack boxes on the assembly line body, detecting by an infrared spectrum analyzer above the assembly line body, and blowing the snack boxes made of polypropylene materials into the collection box through air nozzles on one side of the assembly line body;
step two, crushing: putting the selected polypropylene snack box into a crusher to crush so that the snack box is crushed into particles with the size of 5-10 cm;
step three, purification: a negative pressure suction machine is connected to the crusher in the crushing process, dust and fiber debris in the crushing process are sucked and separated, and meanwhile, iron removal treatment is carried out on particles through an electromagnetic iron remover;
step four, cleaning: placing the crushed particles in a water bath, adjusting the temperature of the water bath to 40-50 ℃, adding a detergent into the water bath, uniformly stirring, cleaning oil stains on the surfaces of the crushed particles, and cleaning the crushed particles by using clear water;
step five, drying: putting the cleaned plastic particles into a horizontal air dryer to remove water;
step six, granulation: and D, putting 85-100 parts of the dried plastic granules obtained in the step five for later use, namely, putting 85-100 parts of the recovered polypropylene plastic granules, 6-10 parts of a toughening agent, 3-5 parts of a compatilizer and 5-8 parts of a molecular regulator into a continuous mixing machine for mixing for 20-30min, and then melting, plasticizing and granulating the mixed materials in a double-screw extruder, wherein the temperatures of the first zone to the eighth zone of the extruder and the temperature of a machine head are respectively 150 ℃, 165 ℃, 175 ℃, 190 ℃, 200 ℃, 215 ℃, 225 ℃, 240 ℃, 245 ℃ and the rotation speed of a screw is 120-150r/min, so as to obtain the regenerated plastic granules.
2. The method for preparing the special material for the recycled plastic granules of the non-woven fabric according to claim 1, which is characterized in that: in the first step, the pipeline body is a horizontal conveying belt, and the moving speed is 1-1.5 m/min.
3. The method for preparing the special material for the recycled plastic granules of the non-woven fabric according to claim 1, which is characterized in that: and in the second step, the rotating speed of the cutter shaft of the pulverizer is 500-750 r/min.
4. The method for preparing the special material for the recycled plastic granules of the non-woven fabric according to claim 1, which is characterized in that: in the fourth step, the adding concentration of the detergent is 30-40%, the stirring and cleaning time is 4-5 hours, and the cleaning with clear water is at least divided into two times.
5. The method for preparing the special material for the recycled plastic granules of the non-woven fabric according to claim 1, which is characterized in that: and fifthly, controlling the air temperature in the horizontal air dryer at 40-60 ℃ and controlling the air speed at 1-1.5 m/s.
6. The method for preparing the special material for the recycled plastic granules of the non-woven fabric according to claim 1, which is characterized in that: the stirring speed of the mixing machine in the sixth step is 300-500r/min, and the mixing temperature is 90-110 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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