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Method for preparing a waterproof, breathable and sound-permeable film by means of lamination and compounding

A waterproof, breathable and sound-permeable membrane technology, which is applied in the direction of electrical components, diaphragm structure, diaphragm extension, etc., can solve the problem of poor waterproof, breathable and sound-permeable effects, and can not take into account the puncture strength, tensile strength and effective sound-permeable area at the same time , surface density can not be well regulated, etc., to achieve the effect of small loss, increased tensile strength, and improved effect

Pending Publication Date: 2017-10-20
施柏德(厦门)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems that the above-mentioned prior art cannot take into account both the puncture strength tensile strength and the effective sound-transmitting area, and the area density cannot be well controlled, resulting in poor waterproof, breathable and sound-permeable effects, the present invention adopts the following technical solutions:

Method used

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  • Method for preparing a waterproof, breathable and sound-permeable film by means of lamination and compounding
  • Method for preparing a waterproof, breathable and sound-permeable film by means of lamination and compounding
  • Method for preparing a waterproof, breathable and sound-permeable film by means of lamination and compounding

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preparation example Construction

[0016] A method for preparing a waterproof, air-permeable, and sound-permeable membrane through lamination, comprising the following steps: S1, mixing: mixing polytetrafluoroethylene and an extrusion aid in a certain proportion; S2, aging: mixing the polytetrafluoroethylene obtained in step S1 The mixture is aged at 30-60 ℃ for 8-24 hours; pre-forming: put the product obtained in step S2 into a pre-forming machine for pre-forming operation, wherein the compression ratio is 1.5-3 times, and the pre-forming pressure is 0.5-2.5 MPa; S4, paste extruding: the product preformed body in the step S4 is sent to the paste extruder for extrusion, the compression ratio in the extrusion process is 20-50, and the extrusion temperature is 40 -60°C, the extrusion pressure is 1-4MPa; S5, calendering: send the product in step S4 to a calender for calendering to obtain a polytetrafluoroethylene base tape; S6, degreasing: the polytetrafluoroethylene obtained in step S5 The base tape is degreased ...

Embodiment 1

[0025] The invention provides a method for preparing a waterproof, air-permeable, and sound-permeable membrane through lamination. The selected raw material is Daikin F106 polytetrafluoroethylene mixed with isoparaffin solvent oil Isopar-C.

[0026] The preparation method comprises the following steps,

[0027] S1, mixing materials: the Daikin F106 brand polytetrafluoroethylene with a mass fraction of 75% and the Isopar-C with a mass fraction of 25% are evenly mixed;

[0028] S2, aging: aging the mixture obtained in step S1 at 35°C for 12h;

[0029]S3, preforming: put the product obtained in step S2 into a preforming machine for preforming operation, wherein the compression rate is 2 times, and the preforming pressure is 2MPa;

[0030] S4. Paste extrusion: Send the preformed embryo body of the product in step S3 to a paste extruder for extrusion. The compression ratio during extrusion is 50, and the extrusion temperature is 50°C. The pressure is 4 MPa;

[0031] S5. Calender...

Embodiment 2

[0043] The invention provides a method for preparing a waterproof, air-permeable, and sound-permeable membrane through lamination. The selected raw material is Daikin F106 polytetrafluoroethylene mixed with isoparaffin solvent oil Isopar-C.

[0044] The preparation method comprises the following steps,

[0045] S1, mixing materials: the Daikin F106 brand polytetrafluoroethylene with a mass fraction of 75% and the Isopar-C with a mass fraction of 25% are mixed evenly;

[0046] S2, aging: aging the mixture obtained in step S1 at 35°C for 12h;

[0047] S3, preforming: put the product obtained in step S2 into a preforming machine for preforming operation, wherein the compression rate is 2 times, and the preforming pressure is 2MPa;

[0048] S4. Paste extrusion: Send the preformed embryo body of the product in step S3 to a paste extruder for extrusion. The compression ratio during extrusion is 50, and the extrusion temperature is 50°C. The pressure is 4 MPa;

[0049] S5. Calende...

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Abstract

The present invention discloses a method for preparing a waterproof, breathable and sound-permeable film by means of lamination and compounding. According to the method, improvement is made in the longitudinal stretching of a traditional technique method; PTFE (polytetrafluoroethylene) base tapes with different longitudinal stretching rates are superposed, and the superposed PTFE base tapes are subjected to rolling, horizontal stretching, sintering and setting sequentially, so that a composite e-PTFE waterproof breathable and sound-permeable film can be finally prepared; the puncture strength and tensile strength of the waterproof, breathable and sound-permeable film are improved, and the waterproof, breathable and sound-permeable effect of the film can be improved through controlling areal density; and under the same sound-permeable effective area, when the areal density reaches a certain value, loss in sound transmission is small, and a use effect is better.

Description

technical field [0001] The invention belongs to the field of production of electronic product accessories, in particular to a method for preparing a waterproof, breathable and sound-permeable membrane through lamination. Background technique [0002] Due to its good physical properties, expanded polytetrafluoroethylene is widely used in electronic products such as mobile phones, walkie-talkies, DV, notebooks, digital cameras, and wearable devices that can make sounds. It is mainly used for waterproof, breathable, and sound-permeable. These portable All products need to open a hole in a certain part, so that the sound can be effectively transmitted from the inside of the shell to the human ear. In order to prevent the opening from being able to effectively cope with external challenges in harsh environments, some products, such as acoustic mesh, TPU film, and e-PTFE film, are generally used to block the opening to effectively protect the inside of the shell. Electronic compo...

Claims

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Application Information

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IPC IPC(8): H04R7/12H04R31/00
CPCH04R7/12H04R31/003H04R2207/021H04R2231/001
Inventor 魏太演杨雅静
Owner 施柏德(厦门)科技有限公司
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