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Magnetic foamed plastic

A foamed plastic and magnetic technology, applied in the field of foamed plastics, can solve the problems of lack of elasticity, small recycling space, and inability to grind at will, and achieves the effect of strong magnetism and large recycling space

Inactive Publication Date: 2008-08-27
林彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that magnets are widely used in various fields in human social activities, and the various properties of magnets are constantly improving and perfecting; however, magnetic materials such as various alloys, ferrite magnetic materials, and rare earth magnetic materials have the following deficiencies: 1. It has a fixed shape after molding, and it cannot be bent arbitrarily according to the required shape, and has no elasticity; 2. When it is bonded with other materials, it cannot be polished at will; 3. The recycling space is small; 4. The processing is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of magnetic foaming plastics, by weight, is made up of following composition,

[0032] EVA 40%

[0033] Rare earth NdFeB magnetic powder 39%

[0034] Azodicarbonamide 3%

[0035] Dicumyl peroxide 5%

[0036] Talc filler 5%

[0037] Glyceryl Monostearate 8%

[0038] (1) EVA 40%, rare earth NdFeB magnetic powder 39%, azodicarbonamide 3%, dicumyl peroxide 5%, talc filler 5%, stearic acid monoglyceride 8%, Put it into the internal mixer according to the required hardness and magnetic requirements, and knead for 15 minutes at a temperature of 100°C;

[0039] (2) the mixture in the step (1) is molded into a 90 * 60mm specification piece with a calender molding machine;

[0040] (3) Transfer the 90 × 60mm specification piece in step (2) to a 1500-ton molded hydraulic foaming machine, and foam for 35 minutes at a temperature of 145° C.;

[0041] (4) Cool the material foamed in step (3) for 27 hours, and set aside;

[0042] (5) Divide the spare material in step (4...

Embodiment 2

[0044] A kind of magnetic foaming plastics, by weight, is made up of following composition,

[0045] PVC 25%

[0046] Rare earth NdFeB magnetic powder 60%

[0047] Azodicarbonamide 1%

[0048] Dicumyl peroxide 5%

[0049] Talc filler 7%

[0050] Calcium Stearate 2%

[0051] (1) Add PVC 25%, rare earth NdFeB magnetic powder 60%, azodicarbonamide 1%, dicumyl peroxide 5%, talcum powder filler 7%, calcium stearate 2%, according to the needs The hardness and magnetic properties of the product are required to be added to the internal mixer, and mixed for 10 minutes at a temperature of 100°C;

[0052] (2) the mixture in the step (1) is molded into a 30 * 30mm specification piece with a calender molding machine;

[0053] (3) Transfer the specification sheet in step (2) to a 200-ton molded hydraulic foaming machine, and foam for 20 minutes at a temperature of 120° C.;

[0054] (4) Cool the material foamed in step (3) for 24 hours, and set aside;

[0055] (5) Divide the spare ma...

Embodiment 3

[0057] A kind of magnetic foaming plastics, by weight, is made up of following composition,

[0058] PE 65%

[0059] Rare earth NdFeB magnetic powder 20%

[0060] Azodicarbonamide 2%

[0061] Dicumyl peroxide 5%

[0062] Talc filler 5%

[0063] Calcium Stearate 3%

[0064] (1) Add PE65%, rare earth NdFeB magnetic powder 20%, azodicarbonamide 2%, dicumyl peroxide 5%, talcum powder filler 5%, calcium stearate 3%, according to the needs The hardness and magnetic properties of the material are required to be added to the internal mixer, and mixed for 15 minutes at a temperature of 120°C;

[0065](2) the mixture in the step (1) is molded into a 40 * 40mm specification piece with a calender molding machine;

[0066] (3) Transfer the specification pieces in step (2) to a 1000-ton molded hydraulic foaming machine, and foam for 30 minutes at a temperature of 140° C.;

[0067] (4) cooling the foamed material in step (3) for 30 hours, and set aside;

[0068] (5) Divide the spare ...

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Abstract

The invention relates to the foaming plastic technical field, in particular to magnetic foaming plastic, which comprises 25-65% plastic rubber composition, 20-60% magnetic powder, 5-15% foamable agent, 5-30% talcum powder filling agent and 2-10% resin acids lubricating agent according to parts by weight, wherein plastic rubber composition is one of EVA, PVC, PE, POE and TPE, magnetic powder is rare earth magnet neodymium iron boron magnetic powder, foamable agent is azobisformamide, adhesive agent is dicumyl peroxide, resin acids lubricating agent is one of monoglyceryl stearate and calcium stearate. Plastic after shaped can be randomly bended according to demanded shapes, and has elasticity, and can joint with other materials, the surface can be randomly polished, and the magnetism is much stronger after polished, recovery and usage space is large, the plastic can be shaped secondly, which is reshaped into shapes which is required through coining heating, and is easy to process since hardness is small.

Description

Technical field: [0001] The invention relates to the technical field of foamed plastics, in particular to a magnetic foamed plastics. Background technique: [0002] With the development of society, the application of magnets is becoming more and more extensive. From high-tech products to the simplest packaging magnets, the most widely used ones are NdFeB magnets and ferrite magnets. [0003] From the perspective of the development history of magnetic materials, the carbon steel used at the end of the 19th century had a magnetic energy product (BH)max (a physical quantity that measures the magnetic energy density of a magnet) less than 1MGOe (megagao), while the mass-produced Nd-Fe- B magnetic material, the magnetic energy product has reached more than 50MGOe. Over the past century, the remanence Br of the material has increased very little, and the increase in energy product is due to the increase in coercive force Hc. The improvement of coercivity is mainly due to the und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L27/06C08L23/06C08K13/02C08K3/00C08K3/34C08K5/098C08K5/103C08K5/14C08J9/10B29C44/60B29B7/28B29B11/12
Inventor 马训龙
Owner 林彬
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