CN108962522A - A kind of environmental protection flexible magnet injects soft pellet and preparation method thereof and utilizes its air device obtained environment protection permanent-magnet magnet ring - Google Patents
A kind of environmental protection flexible magnet injects soft pellet and preparation method thereof and utilizes its air device obtained environment protection permanent-magnet magnet ring Download PDFInfo
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- CN108962522A CN108962522A CN201810730159.7A CN201810730159A CN108962522A CN 108962522 A CN108962522 A CN 108962522A CN 201810730159 A CN201810730159 A CN 201810730159A CN 108962522 A CN108962522 A CN 108962522A
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- 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
- H01F1/032—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 hard-magnetic materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
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Abstract
Soft pellet and preparation method thereof is injected the present invention relates to a kind of environmental protection flexible magnet and utilizes the air device environment protection permanent-magnet magnet ring of its preparation.It includes following preparation component: 60~95 parts by weight of permanent magnetic powder, 0.1~20 parts by weight of Corvic of at least one degree of polymerization, 0.1~40 parts by weight of environment-friendly plasticizer, 0.1~10 parts by weight of 0.1~30 parts by weight of modifying agent, 0.1~10 parts by weight of heat stabilizer and antioxidant that the environmental protection flexible magnet, which injects soft pellet,.The environmental protection flexible magnet that production technology of the present invention provides injects soft pellet and meets ROHS standard using air device environment protection permanent-magnet magnet ring made from it and SGS is authenticated, but also has the advantages that inexpensive, high profit.
Description
Technical field
The present invention relates to permanent-magnet material technical fields more particularly to a kind of environmental protection flexible magnet to inject soft pellet and its preparation
Method and the air device environment protection permanent-magnet magnet ring prepared using it.
Background technique
Air device control system is to be directed to the application of pneumatic control cylinder and research and develop a kind of novel with permanent magnetic ring material
High performance material, market demand increasingly increase.It can be assemblied in after axial charging using magnet ring made from the material pneumatic
It is used as position sensor inside the piston of mechanical oil-vat, the stroke action of cylinder is controlled by the magnetic-inductive device of cylinder periphery,
To achieve the purpose that automation control.
Since air device has wide range of applications, may be used under extremely cold or extreme heat conditions, therefore it is required that permanent magnetic ring
Material has the design of physically stable performance.In performance, material magnetic property with higher is not required nothing more than, while also material being wanted to have
There are good injection property (mobility) and physically stable performance (oil resistivity, cold resistance, heat resistance).Therefore, research and development of products is difficult
Degree is higher, but value-added content of product is considerable.
Japanese SMC, Germany FESTO and Japan CKD are the big pneumatic component suppliers in the world three, and three respectively account for the market in the whole world
Share about 30%.German FESTO mainly occupies European market, and Japanese SMC and CKD mainly occupy Asian market, has more wide
Wealthy market prospects.
It is most using containing the adjacent benzene class non-environmental protection additive such as DOP, DIDP in magnet ring on existing market, it does not meet
International Environmental Protection requires ROHS2.0 standard and phthalic acid ester 6P-16P detection SGS certification.European ROHS2.0 regulation " industry prison
Control equipment and its components should meet ROHS2.0 " from July 22nd, 2017.Although when being forbidden to use the acyclic subject matter insured, switching
The specific time of environmentally friendly product, still there are some disputes, still, most world air device clients indicate once to switch, at that time
It can only receive the environment-friendly products for meeting environmental protection standard certification.Therefore, the permanent magnetic ring material of non-environmental protection is pushed away in domestic and international market
It is wide seriously hampered.With the improvement of people's environmental awareness, non-environmental protection deadline is increasingly closed on, the expectation to environment-friendly products
It is more urgent.And Toda Kogyo Corp. of Japan of supplier in Japanese native country production magnet ring material not can prove that its is existing
Product is that environment-friendly products can be authenticated by ROHS2.0 or phthalic acid ester 6P-16P detects SGS certification.
In quite a long time, the magnetic product of Japanese Toda Kogyo Corp. is pneumatic machinery manufacturer of the world
Unique selection forms the situation of dominance, so that magnet ring material holds at high price.
Summary of the invention
(1) technical problems to be solved
For the problem existing for air device magnet ring not environmentally, at high cost, the present invention provides a kind of environmental protection flexibles
Magnet injects soft pellet and preparation method thereof and the air device environment protection permanent-magnet magnet ring using its preparation.
(2) technical solution
In order to solve the above-mentioned technical problems, the present invention provides following technical solutions:
A kind of environmental protection flexible magnet injects soft pellet, includes following preparation component: 60~95 parts by weight of permanent magnetic powder, at least
A kind of 0.1~20 parts by weight of Corvic of the degree of polymerization, 0.1~40 parts by weight of environment-friendly plasticizer, 0.1~30 weight of modifying agent
Measure part, 0.1~10 parts by weight of 0.1~10 parts by weight of heat stabilizer and antioxidant.
Preferably: the preparation component includes: the polyvinyl chloride of 80~90 parts by weight of permanent magnetic powder, at least one degree of polymerization
2~3 parts by weight of resin, 4~10 parts by weight of environment-friendly plasticizer, 3~5 parts by weight of modifying agent, 0.1~0.5 parts by weight of heat stabilizer
With 0.1~0.5 parts by weight of antioxidant；
Preferably, the preparation component includes: the polyvinyl chloride of 88.2 parts by weight of permanent magnetic powder, at least one degree of polymerization
2.5 parts by weight of resin, 5 parts by weight of environment-friendly plasticizer, 4 parts by weight of modifying agent, 0.2 parts by weight of heat stabilizer and antioxidant 0.1
Parts by weight.
Preferably: the environment-friendly plasticizer includes dioctyl terephthalate and/or acetyl tri-n-butyl citrate；It is preferred that
, the environment-friendly plasticizer includes 3.5~9 parts by weight dioctyl terephthalate and 0.5~1 parts by weight acetyl tributyl citrate three
N-butyl；It is further preferred that the environment-friendly plasticizer includes 4.5 parts by weight dioctyl terephthalate and 0.5 parts by weight acetyl
Tri-n-butyl citrate.
Preferably: the polychlorostyrene that the Corvic includes the polyvinyl chloride that the degree of polymerization is 1300 and the degree of polymerization is 1800
Ethylene；Preferably, the mass ratio for the polyvinyl chloride that the polyvinyl chloride and the degree of polymerization that the degree of polymerization is 1300 are 1800
For 1.6:0.9.
Preferably: it is any one or more of that the permanent magnetic powder is selected from bonded ferrite magnetic powder, lanthanon permanent magnetic powder.
Preferably: the modifying agent is total comprising haloflex, thermoplastic polyurethane elastomer, ethylene-ethylacrylate
Polymers is any one or more of；Preferably, the modifying agent includes 1.7 parts by weight haloflexes, 2.1 parts by weight thermoplastics
Property polyurethane elastomer, 0.2 parts by weight of ethylene-ethyl acrylate copolymer；It is further preferred that the ethylene-ethylacrylate
Copolymer uses ethylene-ethyl acrylate copolymer 894；
The heat stabilizer is selected from any one of calcium zinc stabilizer, organic tin stabilizer, liquid rare earth stabilizer or more
Kind；And/or
The antioxidant is selected from hindered phenol anti-oxidants, amine antioxidants, phosphite antioxidant, thio
Class antioxidant is any one or more of.
A kind of environmental protection flexible magnet injects the preparation method of soft pellet, includes the following steps:
(1) each preparation component is weighed by corresponding parts by weight, is placed in mixing device and is kneaded；
(2) the blocks calender roll slabbing for obtaining mixing, is then comminuted into graininess, obtains the environmental protection flexible
Magnet injects soft pellet.
Preferably: the mixing device is closed pressure kneading machine；
The process conditions of the mixing are as follows: 120-125 DEG C of mixing 35-40min, then 130-135 DEG C of mixing 25-30min；
The partial size that the environmental protection flexible magnet injects soft pellet is 2~10mm；And/or
The melt flow rate (MFR) that the environmental protection flexible magnet injects soft pellet is 20~80g/10min.
A kind of air device environment protection permanent-magnet magnet ring injects soft pellet through being injection moulded using the environmental protection flexible magnet
With magnetize.
A kind of air device environment protection permanent-magnet magnet ring, the injection molding injection temperature are 150~200 DEG C.
(3) beneficial effect
Above-mentioned technical proposal of the invention has the advantages that
Environmental protection: environmental protection flexible magnet is injected soft pellet and is met using air device environment protection permanent-magnet magnet ring made from it
ROHS standard and SGS certification.
Low cost, high profit: soft pellet cost is injected less than 10000 according to the environmental protection flexible magnet of present invention process production
Yuan/ton, and Japanese family field similar product price reaches 50000 yuan/ton.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that environmental protection flexible magnet produced by the present invention injects soft pellet；
Fig. 2 is the structural schematic diagram of air device environment protection permanent-magnet magnet ring produced by the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention, to this hair
Bright technical solution is clearly and completely described.Obviously, described embodiment is a part of the embodiments of the present invention, and
The embodiment being not all of.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work
Under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention provides a kind of environmental protection flexible magnets to inject soft pellet, includes following preparation component: permanent magnetic powder 60~
95 parts by weight, 0.1~40 parts by weight of environment-friendly plasticizer, change 0.1~20 parts by weight of Corvic of at least one degree of polymerization
0.1~30 parts by weight of property agent, 0.1~10 parts by weight of 0.1~10 parts by weight of heat stabilizer and antioxidant.
In some embodiments, the dosage of each component in formula is optimized, the dosage of each component after optimization are as follows: forever
80~90 parts by weight of magnetic magnetic powder, 2~3 parts by weight of Corvic of at least one degree of polymerization, 4~10 weight of environment-friendly plasticizer
Part, 0.1~0.5 parts by weight of 3~5 parts by weight of modifying agent, 0.1~0.5 parts by weight of heat stabilizer and antioxidant.
Formula after advanced optimizing are as follows: the Corvic of 88.2 parts by weight of permanent magnetic powder, at least one degree of polymerization
2.5 parts by weight, 5 parts by weight of environment-friendly plasticizer, 0.1 weight of 4 parts by weight of modifying agent, 0.2 parts by weight of heat stabilizer and antioxidant
Part.
In formula provided by the invention, the environment-friendly plasticizer includes dioctyl terephthalate and/or acetyl lemon
Sour tri-n-butyl；Preferably, the environment-friendly plasticizer includes 3.5~9 parts by weight dioctyl terephthalate and 0.5~1 weight
Measure part acetyl tri-n-butyl citrate；It is further preferred that the environment-friendly plasticizer includes 4.5 parts by weight dioctyl terephthalate
With 0.5 parts by weight acetyl tri-n-butyl citrate.
In formula provided by the invention, the Corvic is preferably the polyvinyl chloride and gather that the degree of polymerization is 1300
The right polyvinyl chloride for being 1800；It is further preferred that polyvinyl chloride and the degree of polymerization that the degree of polymerization is 1300 are 1800
Polyvinyl chloride mass ratio be 1.6:0.9.
In formula provided by the invention, permanent magnetic powder can select bonded ferrite magnetic powder, can also select rare earth forever
Magnetic magnetic powder, such as Nd-Fe-B permanent magnetic magnetic powder.
In formula provided by the invention, the modifying agent includes haloflex, thermoplastic polyurethane elastomer, second
Alkene-ethyl acrylate copolymer is any one or more of；Preferably, the modifying agent includes 1.7 parts by weight chlorinated polyethylenes
Alkene, 2.1 parts per weight of thermoplastic's polyurethane elastomers, 0.2 parts by weight of ethylene-ethyl acrylate copolymer；It is further preferred that described
Ethylene-ethyl acrylate copolymer uses ethylene-ethyl acrylate copolymer 894, i.e. EEA894.
The heat stabilizer is selected from any one of calcium zinc stabilizer, organic tin stabilizer, liquid rare earth stabilizer or more
Kind, preferably calcium zinc stabilizer.
The antioxidant is selected from hindered phenol anti-oxidants, amine antioxidants, phosphite antioxidant, thio
Class antioxidant is any one or more of, preferably hindered phenol anti-oxidants, such as KY1010.
The present invention also provides the preparation methods that a kind of environmental protection flexible magnet injects soft pellet, include the following steps:
(1) each preparation component is weighed by corresponding parts by weight, is placed in mixing device and is kneaded.Mixing device can be selected closed
Formula pressure kneading machine.There are two ways to mixing: one is all preparation components to be added at one time in mixing device, in high temperature
Under make the materials such as resin melt and be uniformly mixed with magnetic powder, realization magnetic powder surface wrapped up by resin etc., increase the oil resistivity of material
And heat resistance.Wherein, the process conditions of mixing are as follows: 120-125 DEG C of mixing 35-40min, then 130-135 DEG C of mixing 25-
30min.Another method is effectively to be mediated using kneading process to resin, plasticizer and heat stabilizer, makes polyvinyl chloride
It can uniformly and effectively be mixed with these auxiliary materials, and resin plasticization can be made, it is poly- for plasticizing after the jelly obtained after kneading is cooling
Vinyl chloride, process conditions are as follows: 120-125 DEG C/35-40min, be then put into plastized polyvinyl chloride, modifying agent and antioxidant
It is kneaded in mixing device, the process conditions of mixing are as follows: 130-135 DEG C/25-30min.
(2) the blocks calender roll slabbing for obtaining mixing, is then comminuted into graininess, obtains the environmental protection flexible
Magnet injects soft pellet.When crushing, sheet output can be ground into the particulate material that partial size is 2~10mm, the shape of particle is not
It limits, can be cube, can be spherical shape, can be cylindrical body etc..The environmental protection flexible magnet injects the molten of soft pellet
Body flow rate is 20~80g/10min.
The present invention also provides a kind of air device environment protection permanent-magnet magnet rings, soft using the environmental protection flexible magnet injection
Pellet is injection moulded and is magnetized.Preferably, the injection molding injection temperature is 150~200 DEG C.
It is the embodiment that the present invention enumerates below.
Embodiment 1
Environmental protection flexible magnet injects the preparation of soft pellet
Preparation component is shown in Table 1.
Table 1
Preparation method includes the following steps:
Weighing: it weighs, each preparation component is weighed up spare according to the ratio in table 1.
It mediates: PVC-1300, PVC-1800, DOTP, ATBC and calcium zinc heat stabilizer is carried out by kneading modeling using kneader
Change, resin and auxiliary material enable uniformly and effectively to mix, the time of kneading and temperature be the key that determine resin moulding quality because
Element, the embodiment mediate 40min at 120 DEG C, and the jelly after kneading is cooling, obtain plasticizing PVC.
Mixing: using closed pressure kneading machine to plasticizing PVC, bonded ferrite magnetic powder, haloflex, KY1010,
Thermoplastic polyurethane elastomer and EEA894 are kneaded.Make the material melts such as resin and and magnetic at high temperature by banburying process
Powder is uniformly mixed, and is realized that magnetic powder surface is coated by resin etc., is increased the oil resistivity and heat resistance of material.The temperature and time of mixing
It is equally the key point of this technique, only temperature and time adjustment is accurate, and the good material of mixing is just bulk material, is not moulded
The powder or particulate material of change are released, and otherwise will affect the comprehensive performance of injection pellet, therefore embodiment mixing at 130 DEG C
30min。
The blocks that mixing obtains is broken into carefully by 360 type calender calender roll slabbings using pelletizing crusher
Fine granularity (size 2-10mm square) obtains environmental protection flexible magnet and injects soft pellet, as shown in Figure 1.Through detecting, MFR
=35g/10min, and its cost is less than 10000 yuan/ton.
Environmental protection flexible magnet is injected into soft pellet and is injection molded into dumbbell shape standard component, carries out national standard plastic intensity detection,
Measure its tensile strength >=1.8MPa.
Environmental protection flexible magnet is injected into soft pellet and is injection molded into cake shape, the saturation detection that magnetizes magnetic property.Detection knot
Fruit is shown in Table 2.
Embodiment 2
The production of air device environment protection permanent-magnet magnet ring
Injection moulding: environmental protection flexible magnet made from embodiment 1 is injected into soft pellet and is injection moulded using injector
Sample preparation is controlled at annulus device, injection temperature at 150 DEG C, obtains permanent magnetic ring, as shown in Figure 2.It, can be with for the size of magnet ring
It controls according to demand Deng.
In use, cut notch at annulus one after will test qualified magnet ring progress axial charging saturation, it is recessed to be inserted in piston
Slot closes notch with glue.One layer of plastic ring is covered again outside usual annulus to be protected.
Embodiment 3
Environmental protection flexible magnet injects the preparation of soft pellet
It is identical with embodiment 1 to prepare component.
Preparation method includes the following steps:
Weighing: it proportionally weighs, each preparation component is weighed up spare.
It mediates: PVC-1300, PVC-1800, DOTP, ATBC and calcium zinc heat stabilizer is carried out by kneading modeling using kneader
Change, 35min is mediated at 125 DEG C, the jelly after kneading is cooling, obtains plasticizing PVC.
Mixing: using closed pressure kneading machine to plasticizing PVC, bonded ferrite magnetic powder, haloflex, KY1010,
Thermoplastic polyurethane elastomer and EEA894 are kneaded, the mixing 25min at 135 DEG C.
The blocks that mixing obtains is broken into carefully by 360 type calender calender roll slabbings using pelletizing crusher
Fine granularity (size 2-10mm square) obtains environmental protection flexible magnet and injects soft pellet.
Environmental protection flexible magnet is injected into soft pellet and is injection molded into dumbbell shape standard component, carries out national standard plastic intensity detection,
Measure its tensile strength >=1.8MPa.
Environmental protection flexible magnet is injected into soft pellet and is injection molded into cake shape, the saturation detection that magnetizes magnetic property.Detection knot
Fruit is shown in Table 2.
Embodiment 4
The production of air device environment protection permanent-magnet magnet ring
Injection moulding: environmental protection flexible magnet made from embodiment 3 is injected into soft pellet and is injection moulded using injector
Sample preparation is controlled at annulus device, injection temperature at 200 DEG C, obtains permanent magnetic ring.
Embodiment 5
Environmental protection flexible magnet injects the preparation of soft pellet
It is identical with embodiment 1 to prepare component.
Preparation method includes the following steps:
Weighing: it proportionally weighs, each preparation component is weighed up spare.
It is kneaded: whole preparation groups being placed in closed pressure kneading machine and are kneaded, the process conditions of mixing are as follows:
120℃/40min、130℃/30min。
Environmental protection flexible magnet is injected into soft pellet and is injection molded into dumbbell shape standard component, carries out national standard plastic intensity detection,
Measure its tensile strength >=1.8MPa.
Environmental protection flexible magnet is injected into soft pellet and is injection molded into cake shape, the saturation detection that magnetizes magnetic property.Detection knot
Fruit is shown in Table 2.
Embodiment 6
The production of air device environment protection permanent-magnet magnet ring
Injection moulding: environmental protection flexible magnet made from embodiment 5 is injected into soft pellet and is injection moulded using injector
Sample preparation is controlled at annulus device, injection temperature at 180 DEG C, obtains permanent magnetic ring.
Table 2
| Detection project | Embodiment 1 | Embodiment 3 | Embodiment 5 |
| Remanent magnetism/mT | 240 | 265 | 255 |
| Coercivity/(kA/m) | 170 | 200 | 185 |
| Intrinsic coercivity/(kA/m) | 260 | 330 | 305 |
| Maximum magnetic energy product/(kJ/m3) | 11.5 | 13.0 | 12.5 |
The performance of magnet ring made from embodiment 2, embodiment 4 and embodiment 6 is detected, detection project includes:
Size detection: size detection is carried out using annulus feeler gauge fixture, judges whether size meets design requirement.
Environmental protection tests: it is detected according to ROHS2.0 standard, phthalic acid ester 6P-16P detection；
Freezing test: whether subzero 18 DEG C or less freezing 100h, observation magnet ring crack, if having grease precipitation.
Heat-resistance test: for 24 hours, whether observation magnet ring cracks, if has grease precipitation for 110 DEG C of heating.Oil resisting test: 60
500h is impregnated at DEG C, magnet ring is taken out after time arrival, places 6 hours under room temperature, measures magnet ring dimensional contraction rate and hardness is shunk
Rate.
Testing result is shown in Table 3.
Table 3
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of environmental protection flexible magnet injects soft pellet, it is characterised in that: include following preparation component: 60~95 weight of permanent magnetic powder
Measure part, 0.1~20 parts by weight of Corvic of at least one degree of polymerization, 0.1~40 parts by weight of environment-friendly plasticizer, modifying agent
0.1~10 parts by weight of 0.1~30 parts by weight, 0.1~10 parts by weight of heat stabilizer and antioxidant.
2. environmental protection flexible magnet according to claim 1 injects soft pellet, it is characterised in that:
The preparation component includes: 2~3 weight of Corvic of 80~90 parts by weight of permanent magnetic powder, at least one degree of polymerization
Measure part, 4~10 parts by weight of environment-friendly plasticizer, 3~5 parts by weight of modifying agent, 0.1~0.5 parts by weight of heat stabilizer and antioxidant
0.1~0.5 parts by weight；
Preferably, the preparation component includes: the Corvic of 88.2 parts by weight of permanent magnetic powder, at least one degree of polymerization
2.5 parts by weight, 5 parts by weight of environment-friendly plasticizer, 0.1 weight of 4 parts by weight of modifying agent, 0.2 parts by weight of heat stabilizer and antioxidant
Part.
3. environmental protection flexible magnet according to claim 1 injects soft pellet, it is characterised in that: the environment-friendly plasticizer includes
Dioctyl terephthalate and/or acetyl tri-n-butyl citrate；Preferably, the environment-friendly plasticizer includes 3.5~9 weight
Part dioctyl terephthalate and 0.5~1 parts by weight acetyl tri-n-butyl citrate；It is further preferred that the environment-friendly plasticizer
Include 4.5 parts by weight dioctyl terephthalate and 0.5 parts by weight acetyl tri-n-butyl citrate.
4. environmental protection flexible magnet according to claim 1 injects soft pellet, it is characterised in that: the Corvic packet
Containing the degree of polymerization be 1300 polyvinyl chloride and the degree of polymerization be 1800 polyvinyl chloride；Preferably, the degree of polymerization is 1300
The mass ratio for the polyvinyl chloride that polyvinyl chloride and the degree of polymerization are 1800 is 1.6:0.9.
5. environmental protection flexible magnet according to claim 1 injects soft pellet, it is characterised in that: the permanent magnetic powder is selected from viscous
It is any one or more of to tie ferromagnetic oxide powder, lanthanon permanent magnetic powder.
6. environmental protection flexible magnet according to claim 1 injects soft pellet, it is characterised in that: the modifying agent includes chlorination
Polyethylene, thermoplastic polyurethane elastomer, ethylene-ethyl acrylate copolymer are any one or more of；Preferably, described
Modifying agent includes 1.7 parts by weight haloflexes, 2.1 parts per weight of thermoplastic's polyurethane elastomers, 0.2 parts by weight of ethylene-propylene
Acetoacetic ester copolymer；It is further preferred that the ethylene-ethyl acrylate copolymer uses ethylene-ethyl acrylate copolymer
894；
It is any one or more of that the heat stabilizer is selected from calcium zinc stabilizer, organic tin stabilizer, liquid rare earth stabilizer；
And/or
It is anti-that the antioxidant is selected from hindered phenol anti-oxidants, amine antioxidants, phosphite antioxidant, thio-based
Oxidant is any one or more of.
7. the preparation method that any one of claim 1 to the 6 environmental protection flexible magnet injects soft pellet, it is characterised in that: including
Following steps:
(1) each preparation component is weighed by corresponding parts by weight, is placed in mixing device and is kneaded；
(2) the blocks calender roll slabbing for obtaining mixing, is then comminuted into graininess, obtains the environmental protection flexible magnet
Inject soft pellet.
8. preparation method according to claim 7, it is characterised in that: the mixing device is closed pressure kneading machine；
The process conditions of the mixing are as follows: 120-125 DEG C of mixing 35-40min, then 130-135 DEG C of mixing 25-30min；
The partial size that the environmental protection flexible magnet injects soft pellet is 2~10mm；And/or
The melt flow rate (MFR) that the environmental protection flexible magnet injects soft pellet is 20~80g/10min.
9. a kind of air device environment protection permanent-magnet magnet ring, which is characterized in that use environmental protection as claimed in any one of claims 1 to 6
Flexible magnet injects soft pellet and is injection moulded and is magnetized.
10. air device according to claim 9 environment protection permanent-magnet magnet ring, which is characterized in that the injection molding note
Penetrating temperature is 150~200 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111540561A (en) * | 2020-05-08 | 2020-08-14 | 北矿科技股份有限公司 | High-temperature-resistant flexible bonding permanent magnet for permanent magnet travel limit switch and preparation method thereof |
| CN111667967A (en) * | 2020-07-11 | 2020-09-15 | 北矿科技股份有限公司 | High-fluidity samarium-iron-nitrogen flexible bonded permanent magnet for injection molding and preparation method thereof |
| CN112175308A (en) * | 2020-11-09 | 2021-01-05 | 横店集团东磁股份有限公司 | Rubber magnetic particle material for injection molding and preparation method thereof |
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| CN112175308A (en) * | 2020-11-09 | 2021-01-05 | 横店集团东磁股份有限公司 | Rubber magnetic particle material for injection molding and preparation method thereof |
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Application publication date: 20181207 |