Composite diaphragm, method for preparing composite diaphragm, and sound generator provided with composite diaphragm
A thin-film layer and structural layer technology, applied in the direction of sensors, electrical components, etc., can solve the problems of difficult to meet the high-quality requirements of electronic equipment and insufficient damping performance, and achieve the effects of improving fidelity, good temperature resistance, and good damping performance
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preparation example Construction
[0045] Such as Figure 4 As shown, the preparation method of the composite diaphragm comprises the following steps:
[0046] S1: Prepare the IPN structure layer.
[0047] The IPN structure layer includes at least two materials, and the at least two materials are fibers, silicones, acrylics, rubbers, polyethylene naphthalate, polyethylene terephthalate One of ester, polybutylene terephthalate, polyurethane, polyether ether ketone, polytetrafluoroethylene, polyvinylidene fluoride, polyimide, polypropylene, polyetherimide and polyphenylene sulfide one or more species.
[0048] One of the above-mentioned at least two materials is coated into a film, and a curing agent is added to cause a cross-linking reaction by itself. The cross-linking reaction means that two or more molecules (usually linear molecules) are bonded to each other The reaction of more stable molecules (body molecules) that cross-link into a network structure. This reaction transforms linear or slightly branche...
Embodiment 1
[0060] Use synthetic fiber cloth and silica gel to make the IPN structure layer. First, make synthetic fiber cloth into synthetic fiber cloth, apply silica gel to the surface of the synthetic fiber cloth, and infiltrate the silica gel into the pores of the synthetic fiber to fill the pores of the fiber. Silica gel, synthetic fiber and silica gel interpenetrate each other to prepare an IPN structure layer with a good network interpenetrating structure.
[0061] Secondly, polyetheretherketone is selected as the material for making the film layer, and the polyetheretherketone is made into the film layer by calendering.
[0062] Finally, the IPN structure layer and the film layer are laminated through a four-roll calender to form a composite diaphragm.
Embodiment 2
[0064] Natural fiber cloth and natural rubber are used to make the IPN structural layer. First, natural fiber is made into natural fiber cloth, and natural rubber is coated on the surface of the natural fiber cloth, and the natural rubber is infiltrated into the pores of the natural fiber to make the natural fiber The pores are filled with silica gel, and the two materials of natural fiber and natural rubber penetrate each other to prepare an IPN structure layer with a good network interpenetrating structure.
[0065] Secondly, polyetheretherketone is selected as the material for making the film layer, and the polyetheretherketone is made into the film layer by calendering.
[0066] Finally, the IPN structure layer and the film layer are laminated through a four-roll calender to form a composite diaphragm.
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