Method for extrusion of multi-layer coated elongate member
A slender component, coating technology, applied in the direction of coating, layered products, electrical components, etc., can solve incompatibility and other problems, and achieve satisfactory property balance and good combination effect
Inactive Publication Date: 2012-01-25
TE CONNECTIVITY CORP
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Furthermore, however, the apparent incompatibility between the two technologies prevents such a process from being realized at very thin layers
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[0022] Exemplary embodiments of the invention relate to methods of coating elongate members, such as forming insulated conductors by extrusion, wherein an underlying layer of coating material is applied by tubing extrusion and a second layer is applied directly to the underlying layer by pressure extrusion superior. Although shown primarily with respect to in-line arrangements, it will be appreciated that the principles of the invention are equally applicable to processes involving intermediate winding and pulling operations. That is, exemplary embodiments of the present invention contemplate in-line extrusion processes and processes in which the coating material is applied in separate, discrete extrusion steps.
[0023] turn to figure 1 , schematically shows an extrusion device 5 in line, which includes a pipe extrusion device 10 and a pressure extrusion device 20, through which the elongated member 100 is pulled through the pressure extrusion device 20, during which the mul...
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Abstract
A method of making a multi-layer insulated elongate member is disclosed. The method includes providing an elongate member (100) and tube extruding a first thermoplastic material onto an outer surface of the elongate member to create a first layer (112) having a thickness less than or equal to 0.064 mm (0.0025 inch) using a first extruder apparatus (10). The method further includes using a second extruder apparatus (20) for pressure extruding a compound comprising a second thermoplastic material different from the first thermoplastic material onto an outer surface of the first layer to create a second layer (212). The second layer fully wets the first layer and the flow point of the first thermoplastic material is at least 3O DEG C greater than the extrusion melt temperature of the second thermoplastic material.
Description
[0001] related application [0002] This application is related to U.S. Application No. 12 / 380,533, entitled "Multi-Layered Insulated Conductor with Crosslinked Outer Layer," and U.S. Application No. 12 / 380, 532, the disclosures of which are incorporated herein by reference. technical field [0003] The present application relates to methods of making multilayer insulated electrical conductors, and more particularly to methods of making multilayer insulated conductors using an extrusion process comprising a combination of pipe extrusion and pressure extrusion techniques. Background technique [0004] In the manufacture of insulated wire, it is known that the technique of pressure extruding insulating material onto an elongated member is used to extrude the material directly onto the conductor. Pressure extrusion is the preferred technique for applying thin coatings to elongated members because tubing extrusion techniques are prone to pinholes or complete breakdown of layer...
Claims
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IPC IPC(8): B29C47/28B32B1/08H01B7/02H01B13/14B29C48/06B29C48/34
CPCB29K2071/00B29C47/025B29C47/20B29K2081/06B29K2079/085B29C47/0014B29K2105/0044B29K2079/08B29K2067/00B29C47/043B29K2027/18B29C47/0004B29K2105/0032B29K2105/0026B29C47/02H01B13/141B29K2105/005B29K2077/00B29C47/065B29C47/0023B29C47/0016B29K2027/16D07B1/162D07B7/145D07B2201/2087D07B2201/2088B29C48/05B29C48/15B29C48/022B29C48/06B29C48/09B29C48/154B29C48/17B29C48/21B29C48/32B32B1/08H01B7/02H01B13/14B29C48/30
Inventor 阿肖克·K·麦汉
Owner TE CONNECTIVITY CORP