A printable magnetic composite film and its preparation method
A technology of composite film and printing layer, applied in the direction of magnets, permanent magnets, magnetic objects, etc., can solve the problems of increasing material costs and process costs of pasting glue, affecting the service life of printing materials, and limited adhesion of double-sided tapes. Achieve improved anti-aging properties, high suction power, avoid scratches or scratches
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Embodiment 1
[0034] The composite film is mainly divided into three layers: the upper layer is the protective layer, the middle layer is the magnetic receiving layer, and the lower layer is the printing layer. The protective layer is used to protect the magnetic receiving layer. The specific material is varnish, and the thickness of the protective layer is 1 micron. , the thickness of the magnetic layer is 0.05 mm, and the printing layer is PVC film.
[0035] The magnetic receiving layer is a composite material composed of soft magnetic powder, polymer binder and auxiliary materials, wherein the soft magnetic powder is Mn-Zn ferrite powder, and the average particle size of the ferrite powder is 2.3 microns; The binder is polyurethane; the auxiliary material is a silane coupling agent.
[0036] In parts by weight, the magnetic receiving layer contains 600 parts of soft magnetic powder, 100 parts of polymer binder, and 5 parts of auxiliary materials.
[0037] The preparation method is as fo...
Embodiment 2
[0046] The difference from Example 1 is that the magnetic receiving layer contains 600 parts of soft magnetic powder, 100 parts of polymer binder, and 10 parts of auxiliary materials. Other processes and formulations are the same as in Example 1.
Embodiment 3
[0048] The difference from Example 1 is that the magnetic receiving layer contains 1000 parts of soft magnetic powder, 120 parts of polymer binder, and 5 parts of auxiliary materials. Other processes and formulations are the same as in Example 1.
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