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Polymer PTC element with excellent weather resistance and its manufacturing method

A technology of PTC components and polymers, applied in the direction of resistors with positive temperature coefficients, resistor shells/packaging shells/potting, etc., can solve the problems of product reliability decline, poor weather resistance, easy aging, etc., to slow down aging speed, enhanced stability and reliability, and improved weather resistance

Inactive Publication Date: 2014-01-22
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a polymer PTC element with excellent weather resistance, so as to solve the problems that the current PPTC element has poor weather resistance, is easy to age when working in a harsh environment, and reduces product reliability.

Method used

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  • Polymer PTC element with excellent weather resistance and its manufacturing method
  • Polymer PTC element with excellent weather resistance and its manufacturing method
  • Polymer PTC element with excellent weather resistance and its manufacturing method

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Embodiment Construction

[0033] The present invention is further described below by accompanying drawing of description:

[0034] A PPTC element with excellent weather resistance, comprising a polymer PTC core material 1 and metal foils 21, 22 attached to both surfaces of the core material, lead-out electrodes 31, 32 welded on the outer surfaces of the metal foils 21, 22, The surfaces of the metal foils 21 and 22 are bumpy and protruding rough surfaces, wherein the outer side of the PPTC element is also coated with an insulating layer, and the insulating layer is a functional insulating layer composed of a three-layer structure, which are respectively: Photoaging layer 41 , anti-oxidation layer 42 and moisture-proof layer 43 .

[0035] Wherein the PTC core material 1 comprises a high molecular polymer, one or more than one inorganic conductive filler or metal powder.

[0036] In this embodiment, the three-layer structure of the insulating layer is as follows from outside to inside: an anti-aging laye...

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Abstract

The invention relates to a polymer PTC (positive temperature coefficient) element with excellent weather resistance and its manufacturing method. The polymer PTC element with excellent weather resistance comprises a macromolecular PTC core material, and metal foils and extraction electrodes attached to two surfaces of the core material. The outside of the PPTC element is coated with an insulating layer, which is composed of the following three layers: an anti-photoaging layer, an anti-oxidation layer and a moisture-proof layer. The anti-photoaging layer adopts alicyclic epoxy resin as the substrate, and is a coating material containing one or several components of an ultraviolet absorber and an ultraviolet shielding agent. The anti-photoaging layer has an ultraviolet transmission rate of less than 1%. The anti-oxidation layer is a glycidyl ether epoxy resin material, or takes glycidyl amine epoxy resin material as the substrate, and has an oxygen penetration constant of less than 1cm<3>*m / m<2> / 24h / 0.1Mpa. The moisture-proof layer takes a silicon based material as the substrate, and has a water vapor penetration constant of less than 1cm<3>*m / m<2> / 24h / 0.1Mpa.

Description

technical field [0001] The invention relates to an electronic component and a manufacturing method thereof, in particular to a polymer PTC component with excellent weather resistance and a manufacturing method thereof. Background technique [0002] Polymer positive temperature coefficient (PPTC) materials are generally formed by mixing crystalline polymers (such as polyethylene) with inorganic conductive fillers (such as carbon black) or metal powders. This kind of polymer material shows obvious PTC characteristics, that is, it shows a low resistivity at room temperature, and the resistivity rises rapidly when the switching temperature is reached, and the change range is generally several orders of magnitude. [0003] The main structure of the polymer positive temperature coefficient thermistor element is generally composed of PPTC material, metal foil as the electrode, and the lead end welded on the metal foil. It is an electronic component commonly used for self-temperatur...

Claims

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Application Information

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IPC IPC(8): H01C7/02H01C1/02
Inventor 赵涛温伟刘正平
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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