WO2012031462A1 - 一种添加再生塑料的可挠性塑胶磁性膜片材料 - Google Patents

一种添加再生塑料的可挠性塑胶磁性膜片材料 Download PDF

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Publication number
WO2012031462A1
WO2012031462A1 PCT/CN2011/070087 CN2011070087W WO2012031462A1 WO 2012031462 A1 WO2012031462 A1 WO 2012031462A1 CN 2011070087 W CN2011070087 W CN 2011070087W WO 2012031462 A1 WO2012031462 A1 WO 2012031462A1
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Prior art keywords
mixture
plastic
magnetic
screw
extruder
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PCT/CN2011/070087
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English (en)
French (fr)
Inventor
吴国明
吴隆章
王学钊
叶荣根
苏畅
汪小明
Original Assignee
广州新莱福磁电有限公司
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Priority claimed from CN2010102853890A external-priority patent/CN101964234B/zh
Application filed by 广州新莱福磁电有限公司 filed Critical 广州新莱福磁电有限公司
Publication of WO2012031462A1 publication Critical patent/WO2012031462A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/9155—Pressure rollers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/28—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder dispersed or suspended in a bonding agent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
    • H01F1/37—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
    • H01F1/375—Flexible bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/906—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using roller calibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/20—Inserts
    • B29K2105/203—Magnetic parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0008—Magnetic or paramagnetic

Definitions

  • This invention relates to magnetic materials and, more particularly, to a flexible plastic magnetic film material incorporating recycled plastic.
  • binders used therein are classified into two types: one is a plastic magnetic material using plastic as a binder, and the other is a rubber magnetic material using an elastomer or a rubber as a binder.
  • the traditional plastic magnetic material using plastic as a binder is prepared by: magnetic powder and thermoplastic (such as PA, PPS) ), the thermoplastic elastomer is uniformly mixed, and the product is obtained by a process such as molding, injection molding, and extrusion.
  • the product structure is mainly composed of a ring, a rod and a strip, and is a non-flexible plastic magnetic material.
  • binders used in flexible rubber magnetic materials are elastomers (such as CPE) or rubber (such as EPDM, NBR). ), generally processed by low temperature rolling, and the processing temperature is below 150 °C.
  • EPDM, NBR Flexible rubber magnetic material for adhesive, poor temperature resistance, poor dimensional stability, and need to be vulcanized to meet the requirements of use; EPDM, NBR After vulcanization, the material itself cannot be reused. The material itself has low breaking strength and is easily broken during calendering.
  • the flexible rubber magnetic material which is a binder contains halogen (mainly fluorine, chlorine, bromine), is not environmentally friendly, and is directly incinerated or buried after disposal to cause pollution to water and soil. Therefore, the disadvantages of the traditional flexible rubber magnetic materials are: 1 It is difficult to use recycled materials as binders, 2) difficult to reuse side materials, 3) waste a lot of petrochemical resources, and 4) pollute the environment.
  • the object of the present invention is to provide a thermoplastic or recycled plastic, or a mixture of recycled plastic and thermoplastic as a binder, which is prepared by an extrusion casting process.
  • the magnetic properties of the traditional rubber-plastic magnetic diaphragm material, and the ultra-wide, ultra-thin, environmentally friendly flexible plastic magnetic diaphragm material are provided.
  • a flexible plastic magnetic film material to which recycled plastic is added is made of the following raw materials in a weight ratio;
  • the recycled plastic is a thermoplastic scrap, scrap and residual product produced in the process of plastic production and plastic product processing, or a commercially available thermoplastic which is processed and cleaned (sheet, block, granule or powder) ).
  • the thermoplastics include polyolefin plastics, polyethylene and grafts thereof, polypropylene and grafts thereof, ethylene-butene or ethylene-octene copolymers ( POE), ethylene-propylene thermoplastic elastomer, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-ethyl acrylate copolymer (EEA) ), polystyrene (PS), styrene-ethylene-butylene-styrene copolymer (SEBS), styrene-butadiene-styrene copolymer (SBS), polymethyl methacrylate ( Any one or a combination of two or more of PMMA), polycarbonate (PC), polyester (PET, PBT), and polyurethane (PU).
  • POE ethylene-butene or ethylene-octene copolymers
  • EVA ethylene-viny
  • the magnetic powder includes a hard magnetic material powder and a soft magnetic material powder.
  • the hard magnetic material powder includes any one or a combination of two or more of barium ferrite magnetic powder and barium ferrite magnetic powder.
  • Soft magnetic material powder Any one or a combination of two or more of iron, nickel, cobalt, and iron, nickel, and cobalt-containing compound powders is included.
  • the auxiliary agent includes any one or a combination of two or more of an antioxidant, an ultraviolet absorber, a lubricant, a coupling agent, and a dispersing agent.
  • the preparation process of the above flexible plastic magnetic film material with added recycled plastic is: magnetic powder, recycled plastic,
  • the thermoplastic and the auxiliary agent are prepared into a mixture according to the ratio, and the mixture is extruded into a film by an extruder, and the product is obtained by two-roll or multi-roll cooling setting; the specific process is divided into the following two types:
  • Process 1 the mixture is fed from the extruder feed port between the extruder barrel and the screw, and the mixture is initially heated in the screw conveying section of the extruder, and simultaneously conveyed to the compression section, and after reaching the compression section, the plastic in the mixture And the temperature of the auxiliary agent is further increased, melting begins, and a gelatinous mixture is gradually formed.
  • the mixture is further conveyed by the screw forward to the homogenization section, in which the mixture is strongly sheared between the screw and the screw, the screw and the barrel.
  • the plastic is completely melted, and a plastic coating layer is formed on the surface of the magnetic powder particles, and finally a completely molten homogeneous mixture is formed, and is drawn through a die, cooled, and then diced by a pelletizer.
  • the barrel temperature of the extruder is controlled at 160 ° C ⁇ 260 ° C.
  • the mixture is added to a kneading device, and under the dual action of heating and pressurization, the mixture is melt-plasticized, and then cooled to obtain a bulk material, and the block mixture is crushed to obtain a sheet-like or granular material.
  • the temperature of the mixing device is controlled 80 ° C ⁇ 230 ° C.
  • the flake-shaped and granular billets are added into the extruder from the barrel, and the flake-shaped and granular billets are transferred, compressed, melted, melted, melted, and pumped in the barrel through the rotation of the screw.
  • the film is extruded and cast into a film, calendered by a lower roll and a middle roll, cooled and shaped, and pulled by an upper roll to obtain a flexible plastic magnetic film material to which a recycled plastic is added.
  • the barrel and mold temperature are controlled 160 ° C ⁇ 260 ° C
  • the product thickness is between 0.10 ⁇ 0.50mm.
  • the kneading device is one or a combination of a mixer, a high-mixer, a screw kneader, an open mill, and an internal mixer.
  • Process 2 the mixture is fed from the extruder feed port to the extruder barrel and the screw, and the mixture is initially heated in the screw conveying section of the extruder, and simultaneously conveyed to the compression section, after reaching the compression section, in the mixture
  • the temperature of the plastics and additives further increases, begins to melt, and gradually forms a gelatinous mixture.
  • the mixture is further transported by the screw to the homogenization section. In this section, the mixture is sheared between the screw and the screw, between the screw and the barrel. Under the action of cutting, the plastic is completely melted, and a plastic coating layer is formed on the surface of the magnetic powder particles, and finally a homogeneous mixture melt is formed.
  • the obtained mixture is melt-transferred into another extruder barrel, and the melt is extruded and formed into a film by a process of mixing, melt pumping, mixing, etc. under the action of the barrel and the screw, and passes through the lower roll.
  • the medium roll is calendered, cooled and shaped, and the upper roll is pulled to obtain a flexible plastic magnetic film material to which recycled plastic is added.
  • Two of the extruder barrels and the casting die temperature are controlled at 160 ° C ⁇ 260 ° C, product thickness between 0.10 ⁇ 0.50mm, can be controlled by adjusting the thickness of the die, the roller spacing and the traction rate of the roller.
  • the flexible plastic magnetic film material of the invention with added recycled plastic uses thermoplastic or recycled plastic, or a mixture of recycled plastic and thermoplastic as a binder, thereby realizing the repeated use of the recycled plastic in the plastic magnetic material. It can be recycled and used for plastic regeneration, saving oil resources and reducing carbon emissions.
  • the flexible plastic magnetic film material added with recycled plastic of the invention is made of halogen-free material, which is beneficial to reduce pollution to water source and soil.
  • the invention obtains a flexible plastic magnetic film material which is added with recycled plastic by an extrusion casting process, and can be thinner and wider than the rubber magnetic material (the thinnest thickness can reach 0.10 mm and the width can reach 3000 mm) ), a wide range of uses.
  • the flexible plastic magnetic film material with the added recycled plastic of the invention is formed into a film by extrusion casting, and the processing method is simple, and the industrial automation production is easy to be realized, and the production efficiency is higher.
  • the iron powder is an oxide of iron
  • the thermoplastic added with recycled plastic is polypropylene (PP) and recycled PP according to 5:1
  • the auxiliary agent includes an antioxidant 1010 and an antioxidant 168, and a lubricant stearic acid.
  • Step A The raw materials are prepared into a mixture according to the above mass ratio.
  • Step B Step A
  • the mixture in the extruder enters between the extruder barrel and the screw.
  • the mixture is initially heated in the screw conveying section of the extruder, and is transported to the compression section. After reaching the compression section, the mixture of plastics and additives The temperature is further increased, melting begins, and a gelatinous mixture is gradually formed.
  • the mixture is further conveyed by the screw forward to the homogenization section, in which the mixture is under the strong shearing action between the screw and the screw, the screw and the barrel.
  • the plastic is completely melted, and a plastic coating layer is formed on the surface of the magnetic powder particles, and finally a completely molten homogeneous mixture is formed, and is drawn through a die, cooled, and then diced by a pelletizer.
  • the barrel temperature of the extruder is controlled at 160 ° C ⁇ 260 ° C.
  • Step C Step B
  • the obtained pellets are fed into the extruder from a barrel, and the pellets are transferred in the barrel through the rotation of the screw, through transfer, compression, melt plasticization, exhaust, melt pump delivery, mixing, etc., and then extruding.
  • the film is cast into a film, calendered by a lower roll and a middle roll, cooled and shaped, and pulled by an upper roll to obtain a flexible plastic magnetic film material to which a recycled plastic is added.
  • the barrel and mold temperature are controlled 160 ° C ⁇ 260 ° C.
  • the product has a thickness of 0.30mm and a width of 3000mm.
  • the anisotropic magnetic powder is a barium ferrite magnetic powder
  • the thermoplastic added with the recycled plastic is polypropylene (PP) and recycled PP.
  • PP polypropylene
  • a 5:1 ratio of the additive comprising an antioxidant 1010 and an antioxidant 168, a lubricant stearic acid, and an ultraviolet absorber.
  • Step A The raw materials are prepared into a mixture according to the above mass ratio.
  • Step B Step A The mixture is added to a kneading device, and under the dual action of heating and pressurization, the mixture is melt-plasticized, and then cooled to obtain a bulk material, and the block mixture is crushed to obtain a sheet-like, powdery material.
  • the temperature of the mixing device is controlled 80 ° C ⁇ 230 ° C.
  • Step C The pellets obtained in the step B are fed into the extruder from the barrel, and the pellets are transferred, compressed, melted, melted, melted, and pumped in the barrel through the rotation of the screw.
  • the film is extruded and cast into a film, calendered by a lower roll and a middle roll, cooled and shaped, and pulled by an upper roll to obtain a flexible plastic magnetic film material to which a recycled plastic is added.
  • the barrel and mold temperature are controlled from 160 °C to 260 °C.
  • the product has a thickness of 0.20mm, a width of 1600mm, a density of 2.40g / cm 3 , and a single-sided multi-pole magnetization with a magnetic length of 1.5mm, and its surface magnetic is 110Gs.
  • the raw materials are as follows:
  • the isotropic magnetic powder is a barium ferrite magnetic powder
  • the thermoplastic added with the recycled plastic is polypropylene (PP) and recycled PP.
  • PP polypropylene
  • a 4:1 ratio of the additive comprising antioxidant 1010 and antioxidant 168, lubricant stearic acid.
  • Step A The raw materials are prepared into a mixture according to the above mass ratio.
  • Step B The mixture is introduced from the extruder feed port between the extruder barrel and the screw, and the mixture is initially heated in the screw conveying section of the extruder, and simultaneously conveyed to the compression section, after reaching the compression section, in the mixture.
  • the temperature of the plastic and auxiliary agent is further increased, melting begins, and a gelatinous mixture is gradually formed.
  • the mixture is further conveyed by the screw forward to the homogenization section, in which the mixture is strong between the screw and the screw, the screw and the barrel. Under the action of shearing, the plastic is completely melted, and a plastic coating layer is formed on the surface of the magnetic powder particles, and finally a homogeneous mixture melt is formed.
  • the obtained mixture is melt-transferred into another extruder barrel, and the melt is extruded and formed into a film by a process of mixing, melt pumping, mixing, etc. under the action of the barrel and the screw, and passes through the lower roll.
  • the medium roll is calendered, cooled and shaped, and the upper roll is pulled to obtain a flexible plastic magnetic film material to which recycled plastic is added.
  • the barrel temperature is controlled from 160 °C to 260 °C.
  • the calender roll temperature is controlled from 120 ° C to 260 ° C.
  • the product has a thickness of 0.30 mm, a width of 1700 mm, and a density of 2.35 g/cm 3 . With 1.5mm magnetic spacing, single-sided multi-pole magnetization, the surface magnetic is 150Gs.
  • the raw materials are as follows:
  • the magnetic powder is a mixture of an isotropic barium ferrite magnetic powder and an isotropic barium ferrite magnetic powder, and the ratio is 2:1.
  • the thermoplastic added with the recycled plastic is a mixture of polyethylene (PE) and recycled PE in a ratio of 5:1, and the auxiliary agent is an antioxidant 1010 and an antioxidant 168. , lubricant stearic acid.
  • the manufacturing method is the same as that in the first embodiment.
  • the product has a thickness of 0.25 mm, a width of 2500 mm, a density of 2.52 g/cm 3 , and is magnetized by a single-sided multi-pole with a magnetic distance of 1.5 mm, and the surface magnetic field is 140 Gs.
  • the raw materials are as follows:
  • the magnetic powder is an isotropic barium ferrite magnetic powder
  • thermoplastic added with recycled plastic is a mixture of polyethylene (PE) and recycled PE in a ratio of 5:1.
  • the manufacturing method is the same as that in the third embodiment, and the product has a thickness of 0.20 mm, a width of 1800 mm, a density of 2.13 g/cm 3 , and a single-pole multi-pole magnetization with a magnetic distance of 1.5 mm, and the surface magnetic field is 75 Gs.
  • the raw materials are as follows:
  • the magnetic powder is an anisotropic strontium ferrite magnetic powder
  • thermoplastic added with recycled plastic is a mixture of polypropylene (PP) and recycled PP in a ratio of 4:1.
  • the manufacturing method was the same as in Example 1.
  • the product had a thickness of 0.3 mm, a width of 2500 mm, a density of 2.6 g/cm 3 , and a single-sided multi-pole magnetization with a magnetic distance of 1.5 mm, and the surface magnetic field was 180 Gs.
  • the raw materials are as follows:
  • the magnetic powder is an isotropic barium ferrite magnetic powder
  • thermoplastic added with recycled plastic is a mixture of polypropylene (PP) and recycled PP in a ratio of 5:1.
  • the auxiliary agent is an antioxidant 1010 and an antioxidant 168, and a lubricant stearic acid.
  • the manufacturing method is the same as that in the second embodiment, and the product has a thickness of 0.25 mm, a width of 3000 mm, a density of 2.45 g/cm 3 , and a single-pole multi-pole magnetization with a magnetic distance of 1.5 mm, and the surface magnetic field is 120 Gs.
  • the raw materials are as follows:
  • the magnetic powder is an anisotropic strontium ferrite magnetic powder
  • thermoplastic is a blend of polyethylene (PE) and polypropylene (PP) in a weight ratio of 1: 2
  • the auxiliary agent is antioxidant 1010 and antioxidant 168, stearic acid
  • the method was the same as in Example 1.
  • the product had a thickness of 0.3 mm, a width of 1700 mm, a density of 2.40 g/cm 3 , and a single-sided multi-pole magnetization with a magnetic distance of 1.5 mm, and the surface magnetic field was 160 Gs.
  • the raw materials are as follows:
  • the magnetic powder is an isotropic barium ferrite magnetic powder
  • thermoplastic is polypropylene (PP)
  • the auxiliaries are antioxidant 1010 and antioxidant 168, stearic acid.
  • the manufacturing method was the same as that in Example 2, and the product had a thickness of 0.4 mm, a width of 3000 mm, a density of 2.6 g/cm 3 , and a single-sided multi-pole magnetization with a 2.0 mm magnetic distance, and the surface magnetic field was 200 Gs.
  • the raw materials are as follows:
  • the magnetic powder is an isotropic barium ferrite magnetic powder
  • thermoplastic is an ethylene-vinyl acetate copolymer (EVA)
  • the auxiliaries are antioxidant 1010 and antioxidant 168, stearic acid.
  • the manufacturing method is the same as that in the third embodiment, and the product has a thickness of 0.2 mm, a width of 1700 mm, a density of 2.5 g/cm 3 , and a single-sided multi-pole magnetization with a magnetic distance of 1.5 mm, and the surface magnetic field is 120 Gs.
  • the raw materials are as follows:
  • the magnetic powder is an isotropic barium ferrite magnetic powder
  • thermoplastic is polyurethane (PU)
  • the auxiliaries are antioxidant 1010 and antioxidant 168, stearic acid.
  • the manufacturing method was the same as in Example 2, and the product had a thickness of 0.2 mm, a width of 1700 mm, a density of 2.5 g/cm 3 , and a single-pole multi-pole magnetization with a magnetic distance of 1.5 mm, and the surface magnetic field was 110 Gs.
  • the raw materials are as follows:
  • the magnetic powder is an isotropic barium ferrite magnetic powder
  • thermoplastic is polyethylene terephthalate (PET)
  • the manufacturing method was the same as that in Example 3.
  • the product had a thickness of 0.2 mm, a width of 2500 mm, a density of 2.3 g/cm 3 , and a single-sided multi-pole magnetization with a magnetic distance of 1.5 mm, and the surface magnetic field was 90 Gs.
  • the flexible plastic magnetic film material to which recycled plastic is added can be slit, slit, and cut into pieces without departing from the principle of the present invention.
  • a number of modifications and modifications on the surface thereof, such as printing, coating, lamination, etc. are modifications, modifications, substitutions, combinations, simplifications, and equivalent substitutions that do not depart from the spirit and principles of the invention. All are included in the scope of protection of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Power Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
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Abstract

本发明提供一种添加再生塑料的可挠性塑胶磁性膜片材料，由如下重量比例的原料组份制成；磁粉72%-85%；再生塑料0%～28%；热塑性塑料0%～28%；助剂0%～3%。制备上述可挠性塑胶磁性膜片材料的方法为将磁粉、再生塑料、热塑性塑料和助剂按照所述比例调制成混合物，混合物通过挤出机挤出流延成膜，经两辊或多辊冷却定型制得产品。本发明实现了再生塑料在塑胶磁性材料中的重复使用，节省石油资源，减少碳排放；同时可实现比橡胶磁性材料做到更薄更宽的可挠性塑胶磁性膜片材料。

Description

一种添加再生塑料的可挠性塑胶磁性膜片材料
技术领域
本发明涉及磁性材料，更具体地讲，涉及 一种 添加再生塑料的可挠性塑胶磁性膜片材料。
背景技术
传统橡塑磁性材料目前每年全球产量达 6 ～ 9 万吨，广泛用于展示展览、礼品、玩具文具、工业产品等。其中使用的粘结剂分为两类：一类是以塑料为粘结剂的塑胶磁性材料，另一类是以弹性体或橡胶为粘结剂的橡胶磁性材料。
传统塑胶磁性材料产品不具可挠性。所谓可挠性是指材料绕一定直径（如 φ=6 、 10mm ）的圆棒，表面没有出现明显裂痕。使用塑料为粘结剂的传统塑胶磁性材料制备方法是：将磁粉与热塑性塑料（如 PA 、 PPS ）、热塑性弹性体混合均匀，经模压、注塑、挤出等工艺制得产品。产品结构以环状、棒状、条状为主，属于非可挠性塑胶磁性材料。目前还未见以热塑性塑料为粘结剂，同时采用挤出流延成膜制备可挠性塑胶磁性膜片材料的文献报道，再生塑料在磁性材料中的应用也是属于空白。
而可挠性橡胶磁性材料使用的粘结剂大多数是弹性体（如 CPE ）或橡胶（如 EPDM 、 NBR ），一般通过低温压延方式加工，加工温度为 150℃ 以下。使用 EPDM 、 NBR 为粘结剂的可挠性橡胶磁性材料，耐温性差，尺寸稳定性不佳，需要通过硫化才能达到使用要求； EPDM 、 NBR 硫化后，材料本身不能重复使用。材料本身断裂强度低，在压延成型时易断裂，很难做到产品厚度 0.30mm 以下，同时宽度达到 1200mm 以上；使用 CPE 为粘结剂的可挠性橡胶磁性材料含有卤素（主要为氟、氯、溴），不环保，废弃后直接焚烧或掩埋处理会对水源和土壤造成污染。所以，传统的可挠性橡胶磁性材料缺点在于： 1 ）难以使用再生料为粘结剂， 2 ）边料难以重复利用， 3 ）浪费大量的石油化工资源， 4 ）污染环境。
中国专利申请 02134329.2 公开了“一种永磁铁氧粘结橡胶磁体及其制造工艺”，该工艺采用密炼机混炼及压延机压延的方法制作出磁性橡胶材料产品，该方法制做出的橡胶磁体厚度为 1 ～ 2mm ，需要经过辐照硫化才能达到使用要求；硫化后的边角料和制品不能回收利用，造成了大量的石油资源浪费。
发明内容
为了解决上述传统塑胶和橡胶磁性材料所存在的问题，本发明的目的在于提供一种以热塑性塑料或再生塑料，或再生塑料和热塑性塑料混合为粘结剂，采用挤出流延工艺制备出具有传统橡塑磁性膜片材料的磁性能，又具有超宽、超薄特点的，环保的可挠性的塑胶磁性膜片材料。
本发明的目的通过下述技术方案实现：一种 添加再生塑料的可挠性塑胶磁性膜片材料，是由如下重量比例的原料组份制成；
磁粉 72% ～ 85%
再生塑料 0% ～ 28%
热塑性塑料 0% ～ 28%
助剂 0% ～ 3%
所述再生塑料为在塑料生产及塑料制品加工过程中产生的热塑性下脚料、边角料和残次品，或者是市面回收的且经加工清洗干净的热塑性塑料（片状、块状、粒状或粉状）。
所述热塑性塑料包括聚烯烃塑料、聚乙烯及其接枝物、聚丙烯及其接枝物、乙烯 - 丁烯或乙烯 - 辛烯共聚物（ POE ）、乙丙热塑性弹性体、乙烯 - 醋酸乙烯酯共聚物（ EVA ）、乙烯 - 丙烯酸共聚物（ EAA ）、乙烯 - 丙烯酸乙酯共聚物（ EEA ）、聚苯乙烯（ PS ）、苯乙烯 - 乙烯 - 丁烯 - 苯乙烯共聚物（ SEBS ）、苯乙烯 - 丁二烯 - 苯乙烯共聚物（ SBS ）、聚甲基丙烯酸甲酯（ PMMA ）、聚碳酸酯（ PC ）、聚酯（ PET 、 PBT ）、聚氨酯（ PU ）中的任意一种或者两种以上的任意组合。
所述磁粉包括硬磁材料粉末和软磁材料粉末。所述硬磁材料粉末包括锶铁氧体磁粉和钡铁氧体磁粉中任一种或两种以上的任意组合。所述软磁材料粉末 包括铁、镍、钴及含铁、镍、钴化合物粉末中的任一种或两种以上的任意组合。
所述助剂包括抗氧剂、紫外线吸收剂、润滑剂、偶联剂和分散剂中的任一种或两种以上的组合。
上述添加再生塑料的可挠性塑胶磁性膜片材料的制备工艺为：将磁粉、 再生塑料、 热塑性塑料和助剂按照所述比例调制成混合物 ，混合物通过挤出机挤出流延成膜，经两辊或多辊冷却定型制得产品；具体工艺分为如下两种：
工艺一：将所述混合物由挤出机加料口进入挤出机机筒与螺杆之间，混合物在挤出机螺杆输送段初步受热，同时向压缩段输送，到达压缩段后，混合物中的塑胶及助剂温度进一步升高，开始熔融，逐渐形成胶状混合物，该混合物被螺杆继续往前输送到均化段，在该段中，混合物在螺杆与螺杆、螺杆与机筒间的强力剪切作用下，塑胶完全熔融，在磁粉粒子表面形成了塑胶包覆层，最终形成了完全熔融的均匀混合物，并通过口模抽丝，冷却后通过切粒机牵引切粒。其中挤出机的机筒温度控制在 160℃ ～ 260℃ 。
将所述的混合物加入到混炼装置中，在加热和加压的双重作用下，混合物进行熔融塑化，然后冷却得到块状物料，将块状混合物进行破碎，制得片状、粒状坯料。其中混炼装置温度控制在 80℃ ～ 230℃ 。
将所述片状、粒状坯料由料筒加入到挤出机中，片状、粒状坯料在机筒中通过螺杆的转动作用，经过传输，压缩，熔融塑化，排气，熔体泵输送，混合等过程，然后挤出流延成膜，通过下辊和中辊压光，冷却定型，上辊牵引，制得添加再生塑料的可挠性塑胶磁性膜片材料。其中机筒和模具温度控制在 160℃ ～ 260℃ ，产品厚度在 0.10 ～ 0.50mm 之间。通过调节模具宽度和模口的厚度，可制备得到不同厚度和宽度的产品。
所述混炼装置为搅拌机、高混机、螺杆混炼机、开炼机、密炼机中的一种或者几种。
工艺二：将所述混合物由挤出机加料口进入到挤出机机筒与螺杆之间，混合物在挤出机螺杆输送段初步受热，同时向压缩段输送，到达压缩段后，混合物中的塑胶及助剂温度进一步升高，开始熔融，逐渐形成胶状混合物，该混合物被螺杆继续往前输送到均化段，在该段中，混合物在螺杆与螺杆、螺杆与机筒间的强力剪切作用下，塑胶完全熔融，在磁粉粒子表面形成了塑胶包覆层，最终形成了均匀混合物熔体。再将所得混合物熔体输送到另一台挤出机机筒中，熔体在机筒和螺杆的作用下，经混炼、熔体泵输送、混合等过程挤出流延成膜，通过下辊和中辊压光，并冷却定型，上辊牵引，制得添加再生塑料的可挠性塑胶磁性膜片材料。其中两台挤出机机筒和流延模具温度控制在 160℃ ～ 260℃ ，产品厚度在 0.10 ～ 0.50mm 之间，可通过调节模口厚度、辊筒间距以及辊筒的牵引速率来控制。
本发明相对于现有技术具有如下优点及有益效果：
（ 1 ）本发明添加再生塑料的可挠性塑胶磁性膜片材料使用热塑性塑料或再生塑料，或再生塑料和热塑性塑料混合为粘结剂，实现了再生塑料在塑胶磁性材料中的重复使用。其本身可回收，亦可用于塑料再生，节省石油资源，减少碳排放。
（ 2 ）本发明添加再生塑料的可挠性塑胶磁性膜片材料使用的粘结剂无需硫化，更适合循环使用。
（ 3 ）本发明添加再生塑料的可挠性塑胶磁性膜片材料使用的原料均为无卤材料，有利于减少对水源和土壤的污染。
（ 4 ）本发明通过挤出流延工艺制得添加再生塑料的可挠性塑胶磁性膜片材料，与橡胶磁性材料相比可以做到更薄更宽（厚度最薄可达 0.10mm ，宽度可达 3000mm ），使用范围广泛。
（ 5 ）本发明添加再生塑料的可挠性塑胶磁性膜片材料通过挤出流延成膜，加工方式简单，易实现工业自动化生产，生产效率更高。
具体实施方式
下面结合实施例对本发明作进一步详细的描述，但本发明的实施方式不限于此。
实施例 1 ：
原料配比如下
铁粉 76.2%
添加再生塑料的热塑性塑料 23.5%
助剂 0.3% 。
所述铁粉为铁的氧化物，所述添加再生塑料的热塑性塑料为聚丙烯（ PP ）和再生 PP 料按照 5:1 比例的混合物，所述助剂包括抗氧剂 1010 及抗氧剂 168 、润滑剂硬脂酸。
步骤 A ：将原材料按照上述质量配比调制成混合物。
步骤 B ：将步骤 A 中的混合物由挤出机加料口进入到挤出机机筒与螺杆之间，混合物在挤出机螺杆输送段初步受热，同时向压缩段输送，到达压缩段后，混合物中的塑胶及助剂温度进一步升高，开始熔融，逐渐形成胶状混合物，该混合物被螺杆继续往前输送到均化段，在该段中，混合物在螺杆与螺杆、螺杆与机筒间的强力剪切作用下，塑胶完全熔融，在磁粉粒子表面形成了塑胶包覆层，最终形成了完全熔融的均匀混合物，并通过口模抽丝，冷却后通过切粒机牵引切粒。其中挤出机的机筒温度控制在 160℃ ～ 260℃ 。
步骤 C ：将步骤 B 制得的粒料由料筒加入到挤出机中，粒料在机筒中通过螺杆的转动作用，经过传输，压缩，熔融塑化，排气，熔体泵输送，混合等过程，然后挤出流延成膜，通过下辊和中辊压光，冷却定型，上辊牵引，制得添加再生塑料的可挠性塑胶磁性膜片材料。其中机筒和模具温度控制在 160℃ ～ 260℃ 。产品厚度为 0.30mm ，宽度为 3000mm 。
实施例 2 ：
原料配比如下
磁粉 81%
添加再生塑料的热塑性塑料 18.6%
助剂 0.4% 。
所述各向异性磁粉为锶铁氧体磁粉，所述添加再生塑料的热塑性塑料为聚丙烯（ PP ）和再生 PP 料按照 5:1 比例的混合物，所述助剂包括抗氧剂 1010 及抗氧剂 168 、润滑剂硬脂酸、紫外线吸收剂。
步骤 A ：将原材料按照上述质量配比调制成混合物。
步骤 B ：将步骤 A 所述的混合物加入到混炼装置中，在加热和加压的双重作用下，混合物进行熔融塑化，然后冷却得到块状物料，将块状混合物进行破碎，制得片状、粉状坯料。其中混炼装置温度控制在 80℃ ～ 230℃ 。
步骤 C ：将步骤 B 制得的粒料由料筒加入到挤出机中，粒料在机筒中通过螺杆的转动作用，经过传输，压缩，熔融塑化，排气，熔体泵输送，混合等过程，然后挤出流延成膜，通过下辊和中辊压光，冷却定型，上辊牵引，制得添加再生塑料的可挠性塑胶磁性膜片材料。其中料筒和模具温度控制在 160 ℃ ～ 260 ℃ 。产品厚度为 0.20mm ，宽度为 1600mm ，密度为 2.40g /cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 110Gs 。
实施例 3 ：
原料配比如下：
磁粉 79%
添加再生塑料的热塑性塑料 20.4%
助剂 0.6%
所述各向同性磁粉为锶铁氧体磁粉，所述添加再生塑料的热塑性塑料为聚丙烯（ PP ）和再生 PP 料按照 4:1 比例的混合物，所述助剂包括抗氧剂 1010 及抗氧剂 168 、润滑剂硬脂酸。
步骤 A ：将原材料按照上述质量配比调制成混合物。
步骤 B ：将所述的混合物由挤出机加料口进入到挤出机机筒与螺杆之间，混合物在挤出机螺杆输送段初步受热，同时向压缩段输送，到达压缩段后，混合物中的塑胶及助剂温度进一步升高，开始熔融，逐渐形成胶状混合物，该混合物被螺杆继续往前输送到均化段，在该段中，混合物在螺杆与螺杆、螺杆与机筒间的强力剪切作用下，塑胶完全熔融，在磁粉粒子表面形成了塑胶包覆层，最终形成了均匀混合物熔体。再将所得混合物熔体输送到另一台挤出机机筒中，熔体在机筒和螺杆的作用下，经混炼、熔体泵输送、混合等过程挤出流延成膜，通过下辊和中辊压光，并冷却定型，上辊牵引，制得添加再生塑料的可挠性塑胶磁性膜片材料。其中料筒温度控制在 160 ℃ ～ 260 ℃ 。压延辊温度控制在 120℃ ～ 260℃ 。产品厚度为 0.30mm ，宽度为 1700mm ，密度为 2.35g /cm3 。经 1.5mm 磁距单面多极充磁，其表磁为 150Gs 。
实施例 4 ：
原料配比如下：
磁粉 82%
添加再生塑料的热塑性塑料 17.7%
助剂 0.3%
所述磁粉为各向同性锶铁氧体磁粉和各向同性钡铁氧体磁粉的混合物，配比为 2 ： 1 ，所述添加再生塑料的热塑性塑料为聚乙烯（ PE ）和再生 PE 料按照 5:1 比例的混合物，所述助剂为抗氧剂 1010 及抗氧剂 168 、润滑剂硬脂酸。
制造方法同实施例 1 ，产品厚度为 0.25mm ，宽度为 2500mm ，密度为 2.52g /cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 140Gs 。
实施例 5
原料配比如下：
磁粉 72%
添加再生塑料的热塑性塑料 28%
所述磁粉为各向同性锶铁氧体磁粉
所述添加再生塑料的热塑性塑料为聚乙烯（ PE ）和再生 PE 料按照 5:1 比例的混合物
制造方法同实施例 3 ， 制得产品厚度为 0.20mm ，宽度为 1800mm ，密度为 2.13g /cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 75Gs 。
实施例 6
原料配比如下：
磁粉 85%
添加再生塑料的热塑性塑料 15%
所述磁粉为各向异性锶铁氧体磁粉
所述添加再生塑料的热塑性塑料为聚丙烯（ PP ）和再生 PP 料按照 4:1 比例的混合物
制造方法同实施例 1 ，制得产品厚度为 0.3mm ，宽度为 2500mm ，密度为 2.6g/cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 180Gs 。
实施例 7
原料配比如下：
磁粉 80%
添加再生塑料的热塑性塑料 17%
助剂 3.0% 。
所述磁粉为各向同性钡铁氧体磁粉
所述添加再生塑料的热塑性塑料为聚丙烯（ PP ）和再生 PP 料按照 5:1 比例的混合物
所述助剂为抗氧剂 1010 及抗氧剂 168 、润滑剂硬脂酸。
制造方法同实施例 2 ， 制得产品厚度为 0.25mm ，宽度为 3000mm ，密度为 2.45g /cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 120Gs 。
实施例 8
原料配比如下：
磁粉 78%
热塑性塑料 21%
助剂 1.0% 。
所述磁粉为各向异性锶铁氧体磁粉
所述热塑性塑料为聚乙烯（ PE ）与聚丙烯 (PP) 共混物，重量比例为 1 ： 2
所述助剂为抗氧剂 1010 及抗氧剂 168 、硬脂酸
方法同实施例 1 ， 制得产品厚度为 0.3mm ，宽度为 1700mm ，密度为 2.40g /cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 160Gs 。
实施例 9
原料配比如下：
磁粉 82%
热塑性塑料 17%
助剂 1.0% 。
所述磁粉为各向同性锶铁氧体磁粉
所述热塑性塑料为聚丙烯（ PP ）
所述助剂为抗氧剂 1010 及抗氧剂 168 、硬脂酸。
制造方法同实施例 2 ， 制得产品厚度为 0.4mm ，宽度为 3000mm ，密度为 2.6g /cm3 ，经 2.0mm 磁距单面多极充磁，其表磁为 200Gs 。
实施例 10
原料配比如下：
磁粉 84%
热塑性塑料 15.7%
助剂 0.3%
所述磁粉为各向同性锶铁氧体磁粉
所述热塑性塑料为乙烯 - 醋酸乙烯酯共聚物（ EVA ）
所述助剂为抗氧剂 1010 及抗氧剂 168 、硬脂酸。
制造方法同实施例 3 ， 制得产品厚度为 0.2mm ，宽度为 1700mm ，密度为 2.5g/cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 120Gs 。
实施例 11
原料配比如下：
磁粉 80%
热塑性塑料 19%
助剂 1%
所述磁粉为各向同性锶铁氧体磁粉
所述热塑性塑料为聚氨酯（ PU ）
所述助剂为抗氧剂 1010 及抗氧剂 168 、硬脂酸。
制造方法同实施例 2 ， 制得产品厚度为 0.2mm ，宽度为 1700mm ，密度为 2.5g/cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 110Gs 。
实施例 12
原料配比如下：
磁粉 72%
热塑性塑料 28%
所述磁粉为各向同性锶铁氧体磁粉
所述热塑性塑料为聚对苯二甲酸乙二醇酯（ PET ）
制造方法同实施例 3 ， 制得产品厚度为 0.2mm ，宽度为 2500mm ，密度为 2.3g/cm3 ，经 1.5mm 磁距单面多极充磁，其表磁为 90Gs 。
应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对添加再生塑料的可挠性塑胶磁性膜片材料进行分切、分条、裁剪成片，或在其表面若干改进和修饰如印刷、涂敷、覆合等，都为未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。

Claims (10)

  1. 一种 添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：由如下重量比例的原料组份制成；
    磁粉 72% ～ 85%
    再生塑料 0% ～ 28%
    热塑性塑料 0% ～ 28%
    助剂 0% ～ 3%
    其制备工艺为：将磁粉、 再生塑料、 热塑性塑料和助剂按照所述比例调制成混合物 ，混合物通过挤出机挤出流延成膜，经两辊或多辊冷却定型制得产品。
  2. 根据权利要求1所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：所述再生塑料为在塑料生产及塑料制品加工过程中产生的热塑性下脚料、边角料和残次品，或者是市面回收的且经加工清洗干净的热塑性塑料。
  3. 根据权利要求2所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：热塑性下脚料、边角料或残次品为片状、块状、粒状或粉状。
  4. 根据权利要求1所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：所述热塑性塑料包括聚烯烃塑料、聚乙烯及其接枝物、聚丙烯及其接枝物、乙烯-丁烯或乙烯-辛烯共聚物、乙丙热塑性弹性体、乙烯-醋酸乙烯酯共聚物、乙烯-丙烯酸共聚物、乙烯-丙烯酸乙酯共聚物、聚苯乙烯、苯乙烯-乙烯-丁烯-苯乙烯共聚物、苯乙烯-丁二烯-苯乙烯共聚物、聚甲基丙烯酸甲酯、聚碳酸酯、聚酯、聚氨酯中的任意一种或者两种以上的任意组合。
  5. 根据权利要求1所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：所述磁粉包括硬磁材料粉末和软磁材料粉末。
  6. 根据权利要求5所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：所述硬磁材料粉末包括锶铁氧体磁粉和钡铁氧体磁粉中任一种或两种以上的任意组合；所述软磁材料粉末包括铁、镍、钴及含铁、镍、钴化合物粉末中的任一种或两种以上的任意组合。
  7. 根据权利要求1所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：所述助剂包括抗氧剂、紫外线吸收剂、润滑剂、偶联剂和分散剂中的任一种或两种以上的组合。
  8. 据权利要求1所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：所述制备工艺具体为：将所述混合物由挤出机加料口进入挤出机机筒与螺杆之间，混合物在挤出机螺杆输送段初步受热，同时向压缩段输送，到达压缩段后，混合物中的塑胶及助剂温度进一步升高，开始熔融，逐渐形成胶状混合物，该混合物被螺杆继续往前输送到均化段，在该段中，混合物在螺杆与螺杆、螺杆与机筒间的强力剪切作用下，塑胶完全熔融，在磁粉粒子表面形成了塑胶包覆层，最终形成了完全熔融的均匀混合物，并通过口模抽丝，冷却后通过切粒机牵引切粒；其中挤出机的机筒温度控制在160℃～260℃；
    将所述的混合物加入到混炼装置中，在加热和加压的双重作用下，混合物进行熔融塑化，然后冷却得到块状物料，将块状混合物进行破碎，制得片状、粒状坯料。其中混炼装置温度控制在80℃～230℃；
    将所述片状、粒状坯料由料筒加入到挤出机中，片状、粒状坯料在机筒中通过螺杆的转动作用，经过传输，压缩，熔融塑化，排气，熔体泵输送，混合等过程，然后挤出流延成膜，通过下辊和中辊压光，冷却定型，上辊牵引，制得添加再生塑料的可挠性塑胶磁性膜片材料；其中机筒和模具温度控制在160℃～260℃，产品厚度在0.10～0.50mm之间；通过调节模具宽度和模口的厚度，制备得到不同厚度和宽度的产品。
  9. 根据权利要求8所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：所述混炼装置为搅拌机、高混机、螺杆混炼机、开炼机、密炼机中的一种或者几种。
  10. 根据权利要求1所述的添加再生塑料的可挠性塑胶磁性膜片材料，其特征在于：所述制备工艺具体为：将所述混合物由挤出机加料口进入到挤出机机筒与螺杆之间，混合物在挤出机螺杆输送段初步受热，同时向压缩段输送，到达压缩段后，混合物中的塑胶及助剂温度进一步升高，开始熔融，逐渐形成胶状混合物，该混合物被螺杆继续往前输送到均化段，在该段中，混合物在螺杆与螺杆、螺杆与机筒间的强力剪切作用下，塑胶完全熔融，在磁粉粒子表面形成了塑胶包覆层，最终形成了均匀混合物熔体；再将所得混合物熔体输送到另一台挤出机机筒中，熔体在机筒和螺杆的作用下，经混炼、熔体泵输送、混合等过程挤出流延成膜，通过下辊和中辊压光，并冷却定型，上辊牵引，制得添加再生塑料的可挠性塑胶磁性膜片材料；其中两台挤出机机筒和流延模具温度控制在160℃～260℃，产品厚度在0.10～0.50mm之间，通过调节模口厚度、辊筒间距以及辊筒的牵引速率来控制。
PCT/CN2011/070087 2010-09-10 2011-01-07 一种添加再生塑料的可挠性塑胶磁性膜片材料 WO2012031462A1 (zh)

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