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Diaphragm composite material and preparation method thereof

A technology of composite materials and layer materials, which is applied in the field of diaphragm composite materials and its preparation, can solve the problems of difficulty in meeting the high-quality requirements of electronic equipment, insufficient damping performance of silica gel diaphragms, and inability to meet speaker applications, etc., to achieve strong rigidity, Good heat resistance, the effect of increasing toughness

Pending Publication Date: 2020-06-12
ZHEJIANG PENGYUAN NEW MATERIAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite diaphragm of the utility model adds thermoplastic polyurethane elastomer on the polyether ether ketone film, although the composite diaphragm has good stability to environmental changes, it can effectively reduce the resonant frequency of the product, widen the frequency band, and improve the loudspeaker Power resistance, simple process, and low production cost; however, the composite diaphragm formed by compounding between layers has poor damping performance, which cannot meet the application of speakers in the low-frequency field
[0006] Invention patent CN106003668A discloses a method for preparing a silica gel diaphragm and a silica gel diaphragm. The silica gel diaphragm is continuously introduced into the mold cavity of a molding machine by introducing the formed silica gel film, so that the silica gel film remains flat in the mold cavity; Close the mold, control the mold temperature; adjust the molding pressure, and maintain the pressure for a period of time; prepare the required silicone diaphragm; although the process of the silica gel diaphragm is simple to operate, easy to form, and can achieve large-scale preparation; but the silica gel diaphragm It is only made of silica gel membrane up and down or left and right molded. Since the silicone diaphragm is made of a single material, the damping performance of the silica gel diaphragm is insufficient. When it is applied to a speaker, the speaker has a slight flaw in the low frequency, and the low frequency performance is insufficient; it is difficult to meet People's requirements for high quality electronic equipment

Method used

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  • Diaphragm composite material and preparation method thereof

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preparation example Construction

[0040]A preparation method of the above-mentioned diaphragm composite material, the preparation method includes the following steps: S1: PEN film layer preparation, the specific preparation steps include:

[0041] S1.1: Dry the material PEN (that is, polyethylene naphthalate) at 100-130°C for 2.5-4 hours; then weigh the following materials in parts by mass: 70-80 parts of PEN, 10-15 Nylon 6, 10-15 parts of fiber-type filler, 1-2 parts of silane coupling agent and 0.5-1 part of lubricant; and the weighed materials are added to the mixer and mixed to form a mixture;

[0042] S1.2: Add ethanol to the mixture and stir it, then feed it into the extruder for melt blending and extrusion granulation; the mass-number ratio of the ethanol to the mixture is 1: (4-6);

[0043] S1.3: Dry the particles extruded in step S1.2 and feed them into an injection molding machine for injection molding to obtain a long-chain branched PEN film layer;

[0044] The silane coupling agent can be KH-550, ...

Embodiment 1

[0060] A diaphragm composite material, comprising a PEN film layer 1, an aluminum-plated film layer 3, an airgel layer 4, and an arrangement between the PEN film layer and the aluminum-plated film layer 3 for bonding the PEN film layer 1 and the elastic adhesive layer 2 of the aluminized film layer 3, the elastic adhesive layer 2 is made of thermoplastic elastomer, specifically mainly made of polyacrylate elastomer or polyurethane elastomer, the elastic adhesive layer 2 The thickness is 12-65 μm, and the setting of the elastic adhesive layer 2 can not only bond the PEN film layer 1 and the aluminized film layer 3 well, but also make the material have a certain toughness, thereby increasing the durability of the product; The aluminized film layer 3 includes a PET film 31 and a metal aluminum layer 32 evaporated on the surface of the PET film 31. The setting of the metal aluminum layer 32 improves the damping performance and electromagnetic shielding performance of the diaphragm ...

Embodiment 2

[0085] This embodiment is basically the same as Embodiment 1, except that the preparation method of the diaphragm composite material provided by this embodiment includes the following steps:

[0086] S1: Preparation of PEN film layer, the specific preparation steps include:

[0087] S1.1: Dry the material PEN (that is, polyethylene naphthalate) at 130°C for 4 hours; then weigh the following materials in parts by mass: 80 parts of PEN, 15 parts of nylon 6, and 15 parts of fiber type Filler, 2 parts of silane coupling agent and 1 part of lubricant; and add the weighed material into the mixer and mix and stir to form a mixture;

[0088] S1.2: Add ethanol to the mixture and stir it, then add it into the extruder for melt blending and extrusion granulation; the ratio of ethanol to the mixture is 1:6 by mass;

[0089] S1.3: Dry the particles extruded in step S1.2 and feed them into an injection molding machine for injection molding to obtain a long-chain branched PEN film layer;

...

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Abstract

The invention relates to the technical field of composite membranes, and particularly relates to a diaphragm composite material and a preparation method thereof. The diaphragm composite material is characterized in that the diaphragm composite layer structure comprises a PEN film layer, an aluminized film layer, an aerogel layer and an elastic adhesive layer which is arranged between the PEN filmlayer and the aluminized film layer and used for bonding the PEN film layer and the aluminized film layer, and the aerogel layer is coated on one surface, far away from the elastic adhesive layer, ofthe aluminized film layer. The diaphragm composite layer is high in strength and rigidity and has better shock absorption, noise reduction, wear resistance and corrosion resistance effects and is worthy of popularization and application.

Description

technical field [0001] The invention relates to the technical field of composite membranes, in particular to a diaphragm composite material and a preparation method thereof. Background technique [0002] The loudspeaker is an important acoustic component in electronic equipment, and it is a kind of sound reinforcement equipment that converts sound wave signals into sound signals and transmits them. Loudspeakers usually include a vibration system and a magnetic circuit system. The vibration system includes a combined diaphragm and voice coil. The diaphragm is one of the important parts of the loudspeaker and plays a vital role in the sound reproduction performance of the loudspeaker. It determines the loudspeaker. The quality of the conversion of electrical energy into sound energy. [0003] Existing diaphragms on the market are usually diaphragms made of composite materials of ordinary polyurethane (TPU) thermoplastic elastomers, engineering plastics and adhesive films. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B9/00B32B9/04B32B15/09B32B15/20B32B27/06B32B27/20B32B27/36B32B33/00H04R7/10H04R7/12B29D7/01
CPCB29D7/01B32B7/12B32B9/00B32B9/041B32B15/09B32B15/20B32B27/06B32B27/20B32B27/36B32B33/00B32B2307/102B32B2307/212B32B2307/306B32B2307/554B32B2307/558B32B2307/56B32B2307/714H04R7/10H04R7/125H04R31/003H04R2307/023H04R2307/025H04R2307/027H04R2307/029
Inventor 林伟强高勇朱杭丽郑赋军
Owner ZHEJIANG PENGYUAN NEW MATERIAL TECH GRP CO LTD
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