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Method for manufacturing positive temperature coefficient element

A technology with a positive temperature coefficient and a manufacturing method, which is applied to the manufacturing of resistors, electrical components, and resistors with positive temperature coefficients, and can solve the problems of unstable electrical properties of components, rising power consumption, and uneven cooling speed.

Inactive Publication Date: 2012-06-20
FUZETEC TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the PTC element 1 is cooled, the overall cooling rate of the mixture 11 composed of crosslinked PTC will be uneven, resulting in an increase in the resistance value of the mixture 11 composed of crosslinked PTC, and causing the PTC element 1 The power consumption increases during use, and the electrical properties of the components are unstable

Method used

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  • Method for manufacturing positive temperature coefficient element
  • Method for manufacturing positive temperature coefficient element
  • Method for manufacturing positive temperature coefficient element

Examples

Experimental program
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Effect test

Embodiment 1

[0052] The embodiment 1 (E1) of the present invention is based on figure 2 and image 3 Based on the described method of the first preferred embodiment, six PTC examples with different PTC polymer compositions (F1-F6) listed in Table 1 were prepared. Each PTC polymer composition (F1-F6) is kneaded and extruded to form the cross-linkable preform 2 . Next, the electrodes 3 are respectively attached to the surface 21 of the cross-linkable preform 2 via a lamination technique to form the laminate 20 having dimensions of 5mm×12mm×0.3mm. Then, a component consisting of the conductive pin 4 and the laminate 20 is placed in a reflow furnace 8 with an operating temperature of 260° C. to solder the conductive pin 4 to the electrode 3 on. Subsequently, the assembly was crosslinked by radiation using the irradiation device 7 to which 100 kGy of Co-60 gamma rays were applied. Finally, the assembly is subjected to a heat treatment; the heat treatment is to constitute the PTC example (E...

Embodiment 2

[0054] The embodiment 2 (E2) of the present invention is based on Figure 4 Based on the described method of the second preferred embodiment, six PTC examples with different PTC polymer compositions (F1-F6) listed in Table 1. were prepared. The procedure and operating conditions for preparing each PTC example of this embodiment 2 are the same as that of this embodiment 1 (E1), and its difference is that the components formed by the conductive pin 4 and the laminate 20 are Heat treatment was applied before and after the crosslinking operation under the same operating conditions as in Example 1 (E1).

Embodiment 3

[0056] The embodiment 3 (E3) of the present invention is based on Figure 5 and Image 6 Based on the depicted method of the third preferred embodiment, six PTC examples with different PTC polymer compositions (F1-F6) listed in Table 1. were prepared. The procedures and operating conditions for preparing each PTC example of Example 3 are the same as those of Example 1 (E1), the difference being that the conductive pin 4 is welded to The electrode 3. In this Example 3 (E3) of the invention, the pressure P provided on said conductive pin 4 of each PTC instance was 50 psi.

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Abstract

The invention discloses a method for manufacturing a positive temperature coefficient element. The method comprises the following steps: a, forming a crosslinkable preformed body containing a macromolecular system and a positive temperature coefficient macromolecular composition of conductive filling; b, attaching a pair of electrodes on the crosslinkable preformed body; c, welding a pair of conductive pins to the electrodes by using lead-free solder paste with melting point over 210 DEG C; and d, crosslinking the crosslinkable preformed body after the step c.

Description

technical field [0001] The present invention relates to a method for manufacturing a positive temperature coefficient (positive temperature coefficient, referred to as PTC) element, in particular to a method for soldering a pair of conductive leads to a crosslinkable preform. After a pair of electrodes on the preform, crosslinking (crosslinking) the positive temperature coefficient element manufacturing method of the crosslinkable preform. Background technique [0002] The positive temperature coefficient (PTC) composite (composite) composed of a polymer and a conductive filler exhibits that when the temperature of the PTC composite material rises to its melting point (melting point), the PTC The resistance value of the composite material (resistance) shows an exponentially increasing positive temperature coefficient characteristic. Therefore, the PTC composite material is usually used as a fuse to protect a circuit from damage, such as a thermistor. [0003] refer to fig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02H01C17/00H01C17/28H01H69/02H01H85/048H01C7/13H01B1/22H01B1/24
Inventor 陈继圣古奇浩
Owner FUZETEC TECHNOLOGY CO LTD
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