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Laminated composite film and preparation method thereof, vibrating diaphragm and sound production device

A technology for sounding devices and composite membranes, applied in lamination devices, polymer material diaphragms, planar diaphragms, etc., can solve the problems of rapid swelling, affecting diaphragm performance and production yield, etc., to improve swelling resistance and improve Effects of improving performance, production yield, and swelling resistance

Active Publication Date: 2021-03-09
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, the diaphragm needs to be fixed with UV glue during assembly, but before the UV glue is cured, the thermoplastic elastomer is likely to swell rapidly, which in turn affects the performance and production yield of the diaphragm

Method used

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  • Laminated composite film and preparation method thereof, vibrating diaphragm and sound production device
  • Laminated composite film and preparation method thereof, vibrating diaphragm and sound production device
  • Laminated composite film and preparation method thereof, vibrating diaphragm and sound production device

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preparation example Construction

[0061] In addition, the present invention also proposes a method for preparing the laminated composite film 10 , which is used for preparing the above-mentioned laminated composite film 10 . The preparation method of the laminated composite film 10 comprises the following steps:

[0062] Step S10, extruding a plurality of materials through a plurality of extruders to form a plurality of molten extrudates.

[0063] Different materials are respectively melted and plasticized by an extruder to form multiple melted extrudates. Among them, the material refers to the raw material for the preparation of a single film layer. For example, the laminated composite film 10 includes a plurality of composite units 101, and each composite unit 101 is formed by laminating two thermoplastic elastomer film layers 11 of different materials. The material of the body film layer 11 is an ethylene thermoplastic elastomer, and the material of the other thermoplastic elastomer film layer 11 is an ami...

Embodiment 1

[0078] refer to figure 1 , the number of layers of the laminated composite film 10 is 4 layers, and its film layer structure is: the first thermoplastic elastomer film layer 11a / the second thermoplastic elastomer film layer 11b / the first thermoplastic elastomer film layer 11a / the second thermoplastic elastomer Film layer 11b. Wherein, the materials of the first thermoplastic elastomer film layer 11 a and the second thermoplastic elastomer film layer 11 b are styrene-based thermoplastic elastomers and olefin-based thermoplastic elastomers in sequence.

[0079] During preparation, the styrene-based thermoplastic elastomer and the olefin-based thermoplastic elastomer are respectively melted and plasticized by an extruder to form two kinds of melted extrudates; Laminated and compounded by a laminator, cooled and formed to obtain a laminated composite film 10 with a thickness of 2 μm and a storage modulus of 35 MPa, wherein the thickness of the four layers of the laminated composi...

Embodiment 2

[0081] refer to figure 2 , the number of layers of the composite film 10 is 4 layers, and its film layer structure is: thermoplastic elastomer film layer 11 / engineering plastic film layer 12 / thermoplastic elastomer film layer 11 / engineering plastic film layer 12. Wherein, the thermoplastic elastomer film layer 11 is made of urethane thermoplastic elastomer with a thickness of 1000 nm; the engineering plastic film layer 12 is made of polyamide with a thickness of 1000 nm.

[0082] During the preparation, the urethane thermoplastic elastomer and the polyamide are melted and plasticized by an extruder respectively to form two kinds of melted extrudates; Laminated and compounded to form a composite, after cooling and forming, a laminated composite film 10 with a thickness of 4 μm and a storage modulus of 950 MPa was obtained.

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Abstract

The invention discloses a laminated composite membrane and a preparation method thereof, a diaphragm and a sound production device, the laminated composite membrane is formed by laminating a pluralityof membrane layers, the plurality of membrane layers comprise thermoplastic elastomer membrane layers, at least two membrane layers are made of different materials, and the diaphragm layers are madeof different materials. The chemical resistance of at least one film layer meets the condition that the weight variation of the film layer is less than 10% when the film layer is soaked in a small molecular organic solvent for 48h. The invention aims to improve the swelling resistance of the vibrating diaphragm to glue.

Description

technical field [0001] The present invention relates to the technical field of sounding devices, in particular to the technical field of diaphragms of sounding devices, in particular to a laminated composite film, a preparation method thereof, a diaphragm and a sounding device. Background technique [0002] Thermoplastic elastomer films have the characteristics of good temperature resistance, excellent resilience, thermoplastic processing, and low cost. Therefore, thermoplastic elastomer films are often used as diaphragms in existing sound-generating devices. In actual production, the diaphragm needs to be fixed with UV glue during assembly, but before the UV glue is cured, the thermoplastic elastomer is likely to swell rapidly, which in turn affects the performance and production yield of the diaphragm. Contents of the invention [0003] The main purpose of the present invention is to provide a laminated composite film and its preparation method, a diaphragm and a soundin...

Claims

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Application Information

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IPC IPC(8): H04R7/10H04R31/00B32B27/08B32B27/28B32B27/30B32B27/32B32B27/34B32B27/36B32B27/40B32B27/42B32B37/00B29C48/08B29C48/21
CPCH04R7/10H04R31/003B32B27/08B32B27/302B32B27/32B32B27/304B32B27/40B32B27/36B32B27/34B32B27/42B32B27/285B32B27/28B32B27/288B32B37/00B29C48/08B29C48/21H04R2231/001H04R2307/025
Inventor 周厚强王海峰李春
Owner GOERTEK INC
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