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A magnetic material system for magnetic locking structural packaging boxes

A magnetic composite material and packaging box technology, applied in the field of magnetic material system, can solve the problems of strong magnetic material generating magnetic field, easy corrosion of metal material, influence of adjacent objects, etc., to achieve convenient molding and processing, avoid pollution, and low cost. Effect

Active Publication Date: 2020-04-03
HANGZHOU QIANSHI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although such a structural box material can also have the effect of locking and attracting, such products have the following problems: First, strong magnetic materials such as NdFeB are expensive, and metal materials are easy to corrode, requiring electroplating or spraying a protective layer ; Second, the process is complicated, and the magnetic ring and the box body need to be assembled later, and it is easy to fail to assemble due to size deviation; Third, strong magnetic materials are easy to generate a magnetic field locally, which will affect adjacent objects

Method used

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  • A magnetic material system for magnetic locking structural packaging boxes
  • A magnetic material system for magnetic locking structural packaging boxes
  • A magnetic material system for magnetic locking structural packaging boxes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a polyamide 6 / ferrite magnetic composite material used for a magnetic locking structure packaging box, the raw materials and mass ratio are as follows:

[0029] Polyamide 6 resin 10%,

[0030] Micron ferrite (d50≤5μm) 85%,

[0031] Chopped Glass Fiber 4%,

[0032] Stearic Acid 1%.

[0033] The process steps are as follows:

[0034] (1) Magnetic powder treatment

[0035] Dissolve 0.8 parts of coupling agent in an appropriate amount of deionized water, the amount of deionized water is limited to completely cover the magnetic powder; then add 100 parts of micron ferrite magnetic powder, stir at a temperature of 50~60°C, Activation, and then drying at 100°C for 6 hours to obtain activated ferrite magnetic powder.

[0036] (2) Mixing and granulation

[0037] According to the mass percentage of 10:85:4:1, mix polyamide 6 resin, micron ferrite magnetic powder, chopped glass fiber and stearic acid evenly, and use a twin-screw extruder at a temperatu...

Embodiment 2

[0042] A method for preparing a polyamide 12 / ferrite magnetic composite material used for a magnetic locking structure packaging box, the raw materials and mass ratio are as follows:

[0043] Polyamide 12 resin 12%,

[0044] Micron ferrite (d50≤5μm) 85%,

[0045] Chopped Carbon Fiber 2%,

[0046] Polyamide Wax 1%.

[0047] The process steps are as follows:

[0048] (1) Magnetic powder treatment

[0049] Dissolve 0.8 parts of coupling agent in an appropriate amount of deionized water, the amount of deionized water is limited to completely cover the magnetic powder; then add 100 parts of micron ferrite magnetic powder, stir at a temperature of 50~60°C, Activation, and then drying at 100°C for 6 hours to obtain activated ferrite magnetic powder.

[0050] (2) Mixing and granulation

[0051] According to the mass percentage of 12:85:2:1, mix polyamide 12 resin, micron ferrite magnetic powder, chopped carbon fiber and polyamide wax evenly, and extrude at a temperature of 200 ℃...

Embodiment 3

[0056] A method for preparing a polypropylene / ferrite magnetic composite material used in a magnetic locking structure packaging box, the raw materials and mass ratio are as follows:

[0057] Polypropylene resin 15%,

[0058] Micron ferrite (d50≤5μm) 81%,

[0059] Chopped Glass Fiber 3%,

[0060] Stearic Acid 1%.

[0061] The process steps are as follows:

[0062] (1) Magnetic powder treatment

[0063] Dissolve 0.8 parts of coupling agent in an appropriate amount of deionized water, the amount of deionized water is limited to completely cover the magnetic powder; then add 100 parts of micron ferrite magnetic powder, stir at a temperature of 50~60°C, Activation, and then drying at 100°C for 6 hours to obtain activated ferrite magnetic powder.

[0064] (2) Mixing and granulation

[0065] According to the mass percentage of 15:81:3:1, polypropylene resin, micron-sized ferrite magnetic powder, chopped glass fiber and stearic acid are mixed evenly, and extruded at a temperatu...

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Abstract

The invention relates to a magnetic material system for a packing box of a magnetic locking structure, in particular to a magnetic locking package structure and a magnetic material system thereof. The following steps are included: anisotropic hard ferrite magnetic powder, a reinforcing material and polymer resin are molten and mixed to prepare a permanent magnetic composite, injection molding and orientation are performed, and magnetizing is performed in the locking direction to obtain a packing box cover and a box body which have weak magnetism. The packing box cover and the box body have weak unidirectional magnetism, and can generate a sufficient locking force in the locking direction after being locked; compared with a traditional strong magnetic material (such as NdFeB permanent magnet material), the designed material and product have the advantages that a local high-intensity magnetic field cannot be generated, ambient objects are prevented from being influenced, and meanwhile, the rare earth resource is saved; and besides, one-time injection molding can be achieved, the production efficiency is high and the cost is low.

Description

technical field [0001] The invention belongs to the field of bonded magnetic composite materials, and relates to a magnetic composite material suitable for injection molding, in particular to a magnetic material system used for magnetic locking structure packaging boxes. Background technique [0002] With the development of the trend of fast and convenient life, some daily necessities packaging boxes have become simple and easy to open and close. Traditionally, some packaging boxes that are locked and fixed with threads or snaps have gradually changed to magnetic attraction. For example, lipstick packaging box: the box body is made of plastic injection molding, and a magnetic ring made of strong magnetic material (such as metal permanent magnet material such as NdFeB) is installed near the entrance of the box body (such as patent CN203662193U), and then the box cover is made of smooth Magnetic material, which can play a role in attraction (if attached figure 1 shown). Alth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L23/12C08K9/06C08K9/04C08K3/22C08K7/14C08K5/09
CPCC08K3/22C08K5/09C08K7/14C08K9/04C08K9/06C08K2003/2265C08K2201/003C08K2201/01C08L77/02C08L2205/02C08L77/00C08L23/12
Inventor 王鑫董玉欣蔡伟周凯王勇杰王帆赵宁宁车声雷姜力强
Owner HANGZHOU QIANSHI TECH