Heating film and method for manufacturing same

A manufacturing method and technology of heating film, applied in ohmic resistance heating, chemical instruments and methods, transparent/reflective heating devices, etc., can solve the problems of complex structure, increased haze of film and bonded glass, affecting physical properties of laminated glass, etc. , to achieve the effect of low reflectivity and low cost

Pending Publication Date: 2020-05-12
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, in order to be stable against etching, the adhesive force needs to be excellent so that roughness corresponding to the surface roughness peculiar to metal foil is generated on the surface of the adhesive when the adhesive is completely cured, thereby , there is a disadvantage of increased haze of the film and bonded glass
In addition, the addition of layers other than PET and metal, which are essential elements, complicates the structure and affects the physical properties of the final laminated glass

Method used

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  • Heating film and method for manufacturing same
  • Heating film and method for manufacturing same
  • Heating film and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Coating thickness of 3 μm and 8 μm matte surface of copper foil, and then dried at 120° C. for 10 minutes to form a PVB layer with a thickness of 5 μm to 7 μm on the matte surface of copper foil. In this case, the Rz of the matte surface of the 3 μm copper foil was 1.5 μm, and the Rz of the matte surface of the 8 μm copper foil was 1.63 μm. Meanwhile, for a copper foil of 3 μm, the average reflectance of the matte surface measured at a wavelength of 380nm to 780nm is 7.6%.

[0103] Afterwards, the substrate was fabricated by laminating PET with a thickness of 50 μm on the copper foil PVB surface at 80 °C and a speed of 4 mpm. In the case of the copper foil having a thickness of 3 μm, since the carrier foil having a thickness of 18 μm was attached to the rear surface of the copper foil to facilitate operation of the film process, the carrier foil was removed before patterning. After that, the copper foil was cleaned / washed / dried with 0.5 wt% sulfuric acid, and then a d...

Embodiment 2

[0106] A coating solution having a refractive index of 1.47 and a glass transition temperature (Tg) of 32° C., 43 parts by weight of ethanol, and 43 parts by weight of methyl ethyl ketone was used to coat a film having a thickness of 3 μm. Copper foil with a matte surface, then dried at 120°C for 3 minutes, and then, after forming a PVB layer with a thickness of 5 μm to 7 μm, thermally laminated with PET with a thickness of 50 μm at 110°C by a hot roll laminator to manufacture substrate. In this case, the matte surface of the 3 μm copper foil used had a surface roughness Rz of 1.5 μm, and an average reflectance measured at a wavelength of 380 nm to 780 nm was 6.7%. In the case of the copper foil having a thickness of 3 μm, since the carrier foil having a thickness of 18 μm was attached to the rear surface of the copper foil to facilitate operation of the film process, the carrier foil was removed before patterning. Form a novolac resin-based resist pattern with a thickness of...

Embodiment 3

[0109]For a copper foil having a thickness of 3 μm, in which the surface roughness of the matte surface is 1.5 μm and the average reflectance measured for the surface at a wavelength of 380 nm to 780 nm is 6.7%, the refractive index with a composition of 14 parts by weight is 1.47 and a glass transition temperature (Tg) of 32° C. PVB, 43 parts by weight of ethanol and 43 parts by weight of methyl ethyl ketone coating solution coated with a thickness of 3 μm copper foil matte surface, and then at 120 °C for 3 minutes to form a PVB layer with a thickness of 5 μm to 7 μm. After that, for the film that was subjected to the process of PET lamination and removal of the carrier foil with a thickness of 18 μm on the back side in the same manner as in Example 2, a resist pattern was formed, and copper was etched, and the resist was removed with a 3% NaOH aqueous solution, The air-exposed copper surface was then blackened by dipping the film in a selenium-based blackening solution for 3...

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Abstract

A heating film according to one embodiment of the present application comprises: a transparent substrate; a coating layer disposed on the transparent substrate and having a refractive index of 1.450 to 1.485; and a metal foil pattern disposed on the coating layer, wherein a surface of the metal foil pattern in contact with the coating layer has a ten point average roughness (Rz) exceeding 0.9 mu m.

Description

technical field [0001] This application claims Korean Patent Application No. 10-2017-0168349 filed with the Korean Intellectual Property Office on December 8, 2017 and Korean Patent Application No. 10-2018 filed with the Korean Intellectual Property Office on November 22, 2018, respectively - Priority and benefit to 0145328, both patent applications are hereby incorporated by reference in their entirety. [0002] The present application relates to a heating film and a manufacturing method thereof. Background technique [0003] Moisture or frost appears on the car glass when there is a difference between the outside temperature of the car and the inside temperature. Heated glass can be used to solve this problem. Heated glass is used as a concept of attaching a hot wire sheet to the glass surface or forming a hot wire directly on the glass surface, and increasing the temperature of the glass surface by applying electric power to both ends of the hot wire to generate heat fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/84H05B3/20H01B5/14H01B1/02
CPCH01B1/02H01B5/14H05B3/84H05B2203/013B32B17/10761B32B17/10385B32B17/10036B32B17/10788B32B17/10743B32B2255/10B32B2307/412B32B23/20B32B2255/28B32B27/365B32B2255/26B32B2255/20B32B2307/732B32B27/286B32B2605/08B32B27/36B32B27/285B32B2605/003B32B27/325B32B2307/538B32B15/20B32B15/09B32B3/263B32B17/10005B32B2367/00H05B3/20H05B2203/017H05B2203/002H05B3/86B32B37/02B32B37/24B32B2250/40B32B2605/006B32B2311/12B32B2255/06B32B2037/243B32B2329/06H05B3/36
Inventor 成知玹尹正一孙常焄李基硕孙镛久金姝延朴钟声李承宪
Owner LG CHEM LTD
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