Substrate provided with coating film

Patent metadata

Field	Value
Publication number	US-11059743-B2
Application number	US-201615741033-A
Country	US
Kind code	B2
Filing date	Jun 13, 2016
Priority date	Jun 30, 2015
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

Disclosed is a process for producing a film-coated substrate having a relatively flat distribution of film thickness such that the film thickness is suppressed from gradually increasing toward a downstream side of flow of a coating liquid even when a coating film is formed on a plate-shaped substrate by a flow coating method in which the substrate is held in raised attitude. The film-coated substrate according to the present invention is employed in particular as an openable/closable window glass of an automotive door, and is suitable for one where the substrate includes an uncoated region where no coating film is formed, wherein the uncoated region is configured to be received in a receiving part of an upper frame of the door.

First claim

The invention claimed is:

1. A door for an automobile, comprising:
an upper frame receiving part as a receiving part of an upper frame;
a lateral frame receiving part as a receiving part of a lateral frame, wherein the lateral frame is adjacent to and substantially perpendicular to the upper frame; and
a window glass implemented by a film-coated substrate, and configured to be opened and closed by vertical slide, wherein the film-coated substrate includes a substrate and a coating film;
wherein the substrate includes an uncoated region where no coating film is formed, wherein the uncoated region is configured to be received in the upper frame receiving part;
wherein the coating film includes a film thickness gradually varying part, wherein the film thickness gradually varying part has a film thickness that decreases gradually toward the uncoated region, wherein the film thickness gradually varying part extends from a line within a predetermined range vertically from an upper edge side periphery of the coating film, wherein the line is substantially parallel to the upper edge side periphery of the coating film;
wherein the film-coated substrate is produced by a film-coated substrate production process including:
an operation of discharging a coating liquid from a main nozzle onto at least the main surface of the substrate as a target of coating, while holding the substrate in raised attitude and causing the main nozzle to travel at an upper side portion of the main surface of the substrate transversely with respect to the substrate, wherein the main nozzle is configured to discharge the coating liquid for formation of the coating film; and
an operation of discharging a solvent from an auxiliary nozzle onto the main surface of the substrate while causing the auxiliary nozzle to travel transversely with respect to the substrate, before discharging the coating liquid as a main coating liquid onto the main surface of the substrate, wherein the auxiliary nozzle is configured to discharge the solvent as an auxiliary coating liquid for dilution of the main coating liquid;
wherein the operation of discharging the main coating liquid from the main nozzle onto the main surface of the substrate is performed when the auxiliary coating liquid is held in liquid film form on the main surface;
wherein the operation of discharging the main coating liquid from the main nozzle includes discharging the main coating liquid to a first region of the main surface outside a second region of the main surface coated with the auxiliary coating liquid, wherein the first region is closer to an upper side of the substrate than the second region, and wherein the second region extends from a first lateral side portion of the substrate to a second lateral side portion of the substrate; and
the film-coated substrate production process includes forming an uncoated region, in which no coating film is formed, in each of the upper side portion and lateral side portions of the substrate, by:
an operation of discharging the auxiliary coating liquid onto the main surface of the substrate, while causing the auxiliary nozzle to travel with respect to the substrate along the upper side and lateral sides of the substrate and with a spacing from each of the upper side and lateral sides; and
an operation of discharging the main coating liquid onto the main surface of the substrate, while causing the main nozzle to travel with respect to the substrate along the upper side of the substrate and with a spacing from the upper side.

2. The door as claimed in claim 1 , wherein the predetermined range is a range of 5 to 200 mm.

3. The door as claimed in claim 1 , wherein an upper surface of the film thickness gradually varying part of the coating film has an angle of 0.0005° to 0.02° with respect to a main surface of the substrate.

4. The door as claimed in claim 1 , wherein the substrate is a curved plate.

5. The door as claimed in claim 1 , wherein:
the coating film has a film thickness of 2.5 to 5.5 μm except for the film thickness gradually varying part; and
the film thickness of the coating film except for the film thickness gradually varying part has a standard deviation less than or equal to 0.5.

6. The door as claimed in claim 1 , wherein a difference in solubility parameter (SP value) between the auxiliary coating liquid and a solvent of the main coating liquid is less than 1.5 (cal/cm 3 ) 1/2 .

7. The door as claimed in claim 1 , wherein the solvent of the main coating liquid is identical in kind to the auxiliary coating liquid.

8. The door as claimed in claim 1 , wherein causing each of the main nozzle and the auxiliary nozzle to travel with respect to the substrate is implemented by causing the each of the main nozzle and the auxiliary nozzle to travel with respect to the substrate along a side of the substrate facing the each of the main nozzle and the auxiliary nozzle and with a spacing from the side, so as to form an uncoated region, in which no coating film is formed, in at least one side portion of the substrate.

9. The door as claimed in claim 1 , wherein the substrate as the target of coating is curved to have an inwardly curved surface, and wherein the film-coated substrate production process includes discharging the main coating liquid and the auxiliary coating liquid onto the inwardly curved surface of the substrate for formation of the coating film.

10. The door as claimed in claim 1 , wherein:
the upper frame receiving part includes a pair of seal lips and a pair of outer lips which slidably hold the substrate from both sides in a thickness direction of the substrate; and
one of the seal lips is in contact with the uncoated region.

11. A door for an automobile, comprising:
an upper frame receiving part as a receiving part of an upper frame;
a lateral frame receiving part as a receiving part of a lateral frame, wherein the lateral frame is adjacent to and substantially perpendicular to the upper frame; and
a window glass implemented by a film-coated substrate, and configured to be opened and closed by vertical slide, wherein the film-coated substrate includes a substrate and a coating film;
wherein the substrate includes an uncoated region where no coating film is formed, wherein the uncoated region is configured to be received in the upper frame receiving part;
wherein the coating film includes a film thickness gradually varying part, wherein the film thickness gradually varying part has a film thickness that decreases gradually toward the uncoated region, wherein the film thickness gradually varying part extends from a line within a predetermined range vertically from an upper edge side periphery of the coating film, wherein the line is substantially parallel to the upper edge side periphery of the coating film; and
wherein the substrate includes a second uncoated region where no coating film is formed, wherein the second uncoated region is configured to be received in the lateral frame receiving part.

12. The door as claimed in claim 11 , wherein:
the lateral frame receiving part includes a pair of seal lips and a pair of outer lips which slidably hold the substrate from both sides in a thickness direction of the substrate; and
one of the seal lips is in contact with the second uncoated region.

13. A door for an automobile, comprising:
an upper frame receiving part as a receiving part of an upper frame; and
a window glass implemented by a film-coated substrate, and configured to be opened and closed by vertical slide, wherein the film-coated substrate includes a substrate and a coating film;
wherein the substrate includes an uncoated region where no coating fil

Assignees

• Central Glass Co Ltd

Inventors

• Yoshimura Ryota
• Kaneda Takeyuki

Classifications

• C03C2218/112

  by spraying · CPC title

• B05D1/36

  Successively applying liquids or other fluent materials, e.g. without intermediate treatment · CPC title

• B05D2401/10

  Organic solvent (B05D2401/21 takes precedence) · CPC title

• C03C17/002

  for flat glass, e.g. float glass · CPC title

• B05D2203/35

  Glass · CPC title