JPH0742716Y2 - Thermal control film with antistatic treatment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal control film. More specifically, the surface ITO coating layer of the control film is cracked.
The present invention relates to a heat control film that is completely antistatic even when the TO coat layer is divided, particularly to a space heat control film.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 3 and 4, a heat control film for space use of this kind is provided with a metal coating layer 2 of aluminum on one side of a polymer film 1 made of polyimide to provide heat reflectivity. Then, the ITO coating layer 3 is provided on the other surface to impart conductivity, and the ground terminal 4 is used at the end of the film,
By sandwiching the film from both sides and simultaneously grounding the ITO coating layer 3 and the aluminum metal coating layer 2,
Both sides of the polyimide film are prevented from being charged and discharged. Then, the heat control film is formed of the ITO coating layer 3
It is used to control the temperature inside the space equipment such as artificial satellites by wrapping space equipment such as satellites as a heat radiation surface toward the outside.

The heat control film having such a structure is considered to be an ideal one for preventing electrification without impairing the reflectance and emissivity of the heat control film because the ITO coating layer is transparent and conductive. It includes such problems as.

That is, since the ITO coat layer 3 is weak against bending, if the heat control film is bent with a large curvature, the ITO coat layer 3 will be bent.
A crack is generated in the ITO coating layer 3, and when one crack 5 extends from one end of the film to the other end, the ITO coat layer 3 is divided, as shown in the figure.
It is divided into two electrically insulated parts A and B. Then, of these two portions, the portion A not including the ground terminal 4 is in an insulating state even if it is grounded via the ground terminal 4, so that it becomes charged.

[0005]

The present invention relates to a thermal control film I
It is intended to provide a heat control film that is antistatic even when the TO coat layer is cracked and divided.

[0006]

Means for Solving the Problems That is, the present invention provides a thermal control film having a polymer coating having heat resistance and radiation resistance on one side and a metal coating layer on the other side. A lattice-like metal coat layer is provided between the ITO coat layer and the polymer film, and an earth terminal is used. The ITO coat layer, the lattice-like metal coat layer, and the metal coat layer are provided at the end of the heat control film. The above-mentioned problem is solved by sandwiching the two and grounding the three simultaneously.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings showing an embodiment. FIG. 1 is a schematic view of the thermal control film of the present invention, and FIG. 2 is an X of FIG.
It is a -X sectional view.

In the heat control film of the present invention, a metal coating layer 12 is provided on one surface of a polymer film 11 to impart heat reflectivity, and a grid-shaped metal coating layer 13 is provided on the other surface, and the grid-shaped metal coating layer 13 is further provided. When the ITO coating layer 14 is provided on the metal coating layer 13 and the ground terminal 15 is used to sandwich the heat control film from both sides at the film end, the ITO coating layer 14, the grid-shaped metal coating layer 13, the metal coating layer It consists of twelve three members at the same time, and the three members are grounded at the same time.

The polymer film 11 is made of a synthetic resin having heat resistance and radiation resistance, and for example, a polyimide resin is preferable. The metal coat layer 12 is preferably vapor-deposited of a metal such as aluminum because it has a high reflectance and is easy to handle. The lattice-shaped metal coating layer 13 is preferably vapor-deposited of a metal such as aluminum from the viewpoint of conductivity and ease of handling, and the lattice is not particularly limited, and the size of the heat control film, desired heat reflectivity, It may be appropriately determined in consideration of the conductivity and the like. In the illustrated one, the metal coating layers are provided in a grid pattern with a width of 3 mm and a length and width of 30 mm at intervals. I
The TO coat layer 14 is not particularly limited and may be a conventional one.

Since the heat control film of the present invention has the above-mentioned constitution, the heat control film is used by being curved, and the ITO coating layer 14 of the film is cracked 16 so that the portion A does not include the ground terminal 15 and the ground terminal. Even if it is divided into the B part which does not include the above, since the grid-shaped metal coat layer 13 exists under the ITO coat layer 14, this prevents the A and B parts from being electrically insulated. When the B portion including the ground terminal 15 is grounded, the A portion not including the ground terminal 15 is also grounded.

Further, since the grid-shaped metal coating layer 13 has excellent heat radiation properties and is structured in a grid pattern, it hardly interferes with the heat radiation function of the heat control film. Further, in the illustrated example, the length of one side of the square surrounded by the center line of the stripe of the metal grid is 33 mm, and the one side of the square surrounded by the stripe side line is 30 mm. in the ratio of left without being coated 30 ^{2/33 2} × 100 =
It becomes 82.6%, and most of it remains uncoated, so that the radiation function of the heat control film is sufficiently maintained and there is no practical problem.
As described above, it is desirable that the ratio of the uncoated grid-like metal coating layer that remains without being coated is approximately 80% or more.

[0012]

As described above, according to the present invention, even if the conductive layer (ITO coating layer) of the heat control film is curved and used, and the conductive layer (ITO coating layer) of the film is divided by cracks, the grid of the lower layer is used. Since the metal coating layer prevents electrical insulation of the cut portion, the grounding function is not disturbed at all, and the antistatic property is completely prevented.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a thermal control film of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a schematic view showing a conventional space thermal control film.

FIG. 4 is a sectional view taken along line YY of FIG.

[Explanation of symbols]

 11 Polymer Film 12 Metal Coat Layer 13 Lattice Metal Coat Layer 14 ITO Coat Layer 15 Ground Terminal 16 Crack

Claims (3)

[Scope of utility model registration request] 1. A metal coating layer on one surface of a polymer film having heat resistance and radiation resistance, and ITO (Indiu) on the other surface.
(m, Tin, Oxide) coat layer, a grid-like metal coat layer is provided between the ITO coat layer and the polymer film, and a ground layer is formed to prevent the heat control film from being charged. A heat control film, which has been subjected to an antistatic treatment for compensating for the electrical conductivity and mechanical strength of the ITO coating layer required for the above. 2. The heat control film according to claim 1, wherein the polymer film is made of a polyimide resin. 3. The thermal control film according to claim 1, wherein the grid-shaped metal coating layer is a vapor deposition layer of aluminum.