JPH04294744A - Moistureproofing case - Google Patents

Abstract

PURPOSE:To easily confirm a moistened condition in a packing case from outside. CONSTITUTION:A case 1 is provided at least partially with a transparent part 5 and a humidity sensor 6 adapted to vary in its color and density with humidity is provided in the case in such a position as to permit the sensor to be seen through the transparent part from outside.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to packaging cases for semiconductors and semiconductor parts that require moisture resistance, rust-preventing cases for precision instruments, and storage cases for preventing the growth of mold on foods, paintings, etc. That is.

0002

[Prior Art] When storing goods that require moisture resistance, such as semiconductor products, foods, and medicines, in packaging cases, it has been conventional to seal silicic acid gel as a moisture absorbent in the same case. It is being done. In a dry state, such a moisture absorbent is a colorless or yellowish brown, transparent or translucent powder, but it is known that it has a large ability to adsorb moisture, and the moisture absorption state can be determined by the fact that it changes to a light purple color.

[0003] Conventional moisture-proof packaging cases already contain a certain amount of moisture, and it is assumed that moisture will gradually enter even after the parts are enclosed, and the case is designed to absorb even a small amount of moisture. A moisture absorbent was inserted. Because of this, if moisture is present in excess of the moisture absorbing capacity of the moisture absorbent, the moisture-proof packaging case cannot function as a moisture-proof packaging case.

In the conventional moisture-proof packaging case, as shown in FIG. 4, the parts 2 and moisture absorbent 3 placed in the case 1 are wrapped in a non-transparent sheet 4 such as nylon cloth and sealed. Furthermore, it is not possible to discern the discolored state of the moisture absorbent from the outside, and the state of moisture inside is also completely unknown. Therefore, the state of the moisture absorbent could only be determined after the parts were removed from the case, and the case could not function satisfactorily as a moisture-proof packaging case.

[0005]

One of the problems to be solved by the present invention is that in a packaging case, the state of moisture inside the case cannot be checked from the outside. Another problem is that the inside of the case is not dehumidified before packaging.

[0006]

[Means for Solving the Problems] The present invention provides a transparent part in at least a part of the case, and a humidity sensor whose color and density change depending on the humidity, in order to make it possible to check the humidity condition inside the case from the outside. It is characterized by being installed so that the humidity status can be checked from the outside through the transparent part. The present invention also makes it possible to check the humidity sensor from the outside by pasting or coating the humidity sensor inside the transparent part to form a layer. The present invention also provides a humidity sensor coated or printed on a breathable plate and attached to the inside of the transparent part. Furthermore, the present invention uses a humidity sensor that itself has hygroscopic properties.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a full vertical sectional view of an embodiment of a moisture-proof case of the present invention. Reference numeral 1 denotes a moisture-proof packaging case, which is either entirely transparent or partially transparent. 2
is a semiconductor product such as a semiconductor LSI, which is housed in the case 1. 6 is a humidity sensor. The humidity sensor 5 is made of powder of a substance whose color and density change depending on the humidity, and in this embodiment, it is formed into a thin layer by coating or printing on the inside of the transparent part 5 of the case.

FIG. 2 is a partially enlarged sectional view of a portion to which a humidity sensor is attached in another embodiment of the present invention. Reference numeral 5 denotes a part of the transparent part of the case, on the inside of which a plate 7 having ventilation grooves or holes 8 is attached, and on the surface of this plate 7 facing the transparent part, a humidity sensor 6 is coated or printed in a layer. It is provided.

FIG. 3 shows food products according to another embodiment of the present invention.
This is an example of a completely transparent container when applied to the preservation and preservation of medicines or precious metals. In this case, a humidity sensor 6 is provided on the inner surface of the side wall 9 of the transparent container, so that changes in color and density can be seen from the outside.

A moisture absorbent such as silicic acid gel (trade name: silica gel) is used as a humidity sensor. The moisture absorbent itself changes color from colorless to pale purple due to moisture absorption, and the degree of moisture absorption can be easily identified from the outside through the transparent portion.

[0011]

[Effects of the Invention] As explained above, the moisture-proof case of the present invention allows you to easily see changes in the humidity sensor from the outside through the transparent part of the case, and check the internal humidity condition without dismantling the case. be able to. Also,
Humidity sensors can be easily installed and removed from cases by being coated or printed on a breathable board, making them extremely effective for preserving and preserving semiconductor products, medicines, foods, and the like.

[Brief explanation of drawings]

FIG. 1 is an overall vertical sectional view of a moisture-proof case showing an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view of a moisture-proof case showing another embodiment of the present invention.

FIG. 3 is an overall vertical sectional view of a bottle-shaped moisture-proof case showing another embodiment of the present invention.

FIG. 4 is an overall vertical cross-sectional view showing a schematic structure of a conventional moisture-proof case.

[Explanation of symbols]

1 case 2 Parts 3 Moisture absorbent 4 Non-breathable sheet 5 Transparent part 6 Humidity sensor 7. Board with breathability 8 Ventilation hole 9 Transparent side wall of the container

Claims (4)

[Claims] Claim 1: In a case having at least a part of a transparent part, at a position visible from the outside through the transparent part,
A moisture-proof case featuring a humidity sensor installed inside the case whose color and density change depending on the humidity. 2. The moisture-proof case according to claim 1, wherein the humidity sensor is formed into a layer by pasting or coating inside the transparent part. 3. The moisture-proof case according to claim 1, wherein the humidity sensor is a breathable plate coated or printed with a sensor substance. 4. The moisture-proof case according to claim 1, wherein the humidity sensor has a high hygroscopicity and its color and density change when it absorbs moisture.