Condensation prevention cover sheet

Abstract

To provide a cover sheet for preventing condensation that occurs during storage and transportation of steel materials. [Solution] This device is a cover sheet 1 for preventing condensation during storage and transportation of steel materials, consisting of a porous fiber mesh sheet 3 and a thin metal film sheet 4 made of glass cloth laminated with aluminum foil coated on both sides to prevent corrosion. The high-purity aluminum foil's high heat reflectivity and low heat radiation properties are utilized to maintain the temperature difference between the steel material and the outside air, thereby preventing condensation. Furthermore, when laminating the thin metal film sheet to the porous fiber mesh sheet, gaps are provided on all four sides of the thin metal film sheet, allowing for easy folding. When cutting the thin metal film sheet to provide the gaps on all four sides, the sheet may be angled to form a parallelogram, making it even easier to fold on a loading platform.

Description

[Technical Field]

[0001] This invention relates to a cover sheet for preventing condensation that occurs during storage and transportation of steel materials after they have been refined. [Background technology]

[0002] Condensation that occurs during storage and transportation of steel after it has been refined can affect the quality and use of the steel. When steel is moved from a hot manufacturing environment to a relatively cooler external environment, the temperature difference makes it more likely for condensation to form. High humidity in the air increases the risk of condensation, and condensation occurs frequently, especially during the rainy season and in humid regions. Condensation forms moisture on the surface of the steel, which can lead to rust and corrosion.

[0003] Current countermeasures include using highly moisture-proof packaging materials to protect steel from external moisture, or using moisture-absorbing materials when packaging, but these have problems in terms of cost and labor, and transport companies and others are currently struggling with this. Also, depending on the delivery destination, there is a need for frequent storage work on the loading platform, and there is a demand for a cover sheet that can be folded when stored.

[0004] Patent Document 1 presents a method for insulating steel containers, which are widely used in various logistics processes such as cargo storage, land and sea transportation, storage, and conveyance, as well as a high-performance insulating sheet suitable for implementing this insulating method. However, the high-performance insulating sheet is complex, consisting of a core material made of a low-thermal conductivity plastic foam sheet containing dispersed micro-hollow ceramic balloon particles, aluminum alloy foil heat-welded to the front and back of the foam sheet core material via a micro-particle aluminum vapor-deposited sheet, and each outer surface of the aluminum alloy foil is further coated with a corrosion-resistant coating.

[0005] Patent Document 2 presents a combination of a metal thin film sheet and an embossed sheet, but although it is intended for use on building walls, ceilings, floors, etc. and has heat-shielding and heat-insulating effects, there is no mention of its application as a cover sheet to prevent condensation from occurring during storage and transportation of steel materials. [Prior art documents]

[0006] [Patent Document 1] Patent No. 5063547 [Patent Document 2] Utility Model Registration No. 3241270 Summary of the Invention [Problem to be solved by the invention]

[0007] Normally, condensation occurs during storage and transportation of steel products due to the temperature difference between the steel product and the outside air caused by preheating the steel product after finishing. Conversely, when the steel product is cold, condensation occurs due to the temperature difference between the steel product and the hot and humid outside air, which has a negative impact on the quality and use of the steel product. Therefore, the object of this invention is to provide a cover sheet to prevent condensation that occurs during storage and transportation of steel products. [Means for solving the problem]

[0008] The cover sheet for preventing condensation to achieve the above-mentioned objective is a cover sheet that prevents condensation from occurring on steel materials during storage and transportation, and is made of a porous fiber mesh sheet with a thin metal film sheet made of glass cloth and aluminum foil with a double-sided corrosion prevention coating attached to one side.

[0009] The high-purity aluminum foil has the characteristics of high heat reflection and low radiation, and by maintaining the temperature difference between the steel material and the outside air, condensation is prevented.

[0010] This device also features a porous fiber mesh sheet with a metal thin film sheet, made of glass cloth with aluminum foil coated on both sides for corrosion prevention, attached to one side, but by providing gaps on all four sides of the metal thin film sheet when attaching it to the porous fiber mesh sheet, it is possible to easily fold it even on a cargo bed.

[0011] Furthermore, when cutting the metal thin film sheet, an angle may be set so that the sheet forms a parallelogram, and gaps may be provided on all four sides of the metal thin film sheet, thereby enabling the sheet to be folded when stored. [Effects of the Invention]

[0012] This device is a cover sheet to prevent condensation that occurs during storage and transportation of steel materials. It utilizes the properties of a heat-shielding sheet that reflects 97% of radiant heat, and prevents condensation by maintaining the temperature difference between the steel material and the outside air. It can also be folded for storage, simplifying the work involved. [Brief explanation of the drawings]

[0013] [Figure 1] Roll-type cover sheet configuration diagram [Figure 2] Cross section of roll-type cover sheet [Figure 3] Folding cover sheet configuration diagram [Figure 4] Cross-sectional view of the foldable cover sheet [Figure 5] Diagram of another folding cover sheet [Figure 6] Folding diagram of another type of folding cover sheet [Figure 7] Cover sheet surface temperature during heat shielding performance test [Figure 8] Cover sheet backside temperature during heat insulation performance test DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cover sheet for preventing condensation that occurs during storage and transportation of steel materials according to the present invention will be described in detail below with reference to the drawings.

[0015] Figure 1 shows the structure of a roll-type cover sheet, and Figure 2 shows a cross-sectional view of the roll-type cover sheet. The cover sheet of this invention is composed of a heat-shielding sheet made of high-purity aluminum foil coated with a porous fiber material, and the porous fiber mesh sheet 3 is integrated with the metal thin film heat-shielding sheet 4 to provide breathability while also reflecting heat.

[0016] Therefore, the cover sheet of this invention can improve the current situation where condensation occurs during storage and transportation of steel due to the temperature difference between the steel and the outside air when the steel is preheated after being refined, or conversely, when the steel is cold, condensation occurs due to the temperature difference between the steel and the hot and humid outside air, which has a negative impact on the quality and use of the steel.

[0017] The sheet of this invention is, for example, 3m wide x 4m long, with eyelets on the edges and secured with rubber bands, and multiple sheets are used to fit the size of the loading platform. Furthermore, after loading steel materials onto a transport vehicle, the cover sheet of this invention can be covered with a regular hollow sheet.

[0018] In addition, this invention is a cover sheet that has a structure in which a metal thin film sheet made of glass cloth with aluminum foil coated on both sides to prevent corrosion is attached to one side of a porous fiber mesh sheet, and when the metal thin film sheet is attached to the porous fiber mesh sheet, gaps are provided on all four sides of the metal thin film sheet, as shown in Figures 3 and 4, making it easy to fold.

[0019] Furthermore, the metal thin film sheet may be cut into a parallelogram shape at an angle, as shown in Figures 5 and 6. A preferred angle is, for example, 6 degrees. This makes it easier to fold the sheet onto a carrier. [Example]

[0020] Steel material was placed on the truck bed, and the cover sheet of this invention was placed on top of it. The sheet was 1.5m wide x 6.5m long, with eyelets on the ends and secured with rubber bands. Multiple sheets were used to fit the size of the bed. By installing the cover sheet of this invention, it was possible to prevent condensation from forming on the steel surface.

[0021] Because it is difficult to measure the actual product, the heat-shielding performance of the cover sheet of this invention was tested using an infrared heater. Two iron plates were placed in front of the infrared heater, and the sheet of this invention was attached to one of them, and the temperatures of the heated surface and back surface were measured.

[0022] As shown in Figure 7, when heated with a 300W infrared heater, the surface temperature of the heated side of the steel plate with the cover sheet of this invention was 71.1°C, while the surface temperature of the heated side of the steel plate without the cover sheet was 69.8°C, which were almost the same. On the other hand, as shown in Figure 8, the backside temperature with the cover sheet of this invention was 29.3°C, while the backside temperature without the cover sheet was 49.7°C. In other words, the temperature difference between with and without the cover sheet was 20.4°C. This result shows that the heat-shielding effect of the cover sheet of this invention can prevent the steel from reaching the dew point and prevent condensation from occurring. [Explanation of symbols]

[0023] 1. Cover sheet of the present invention 2 Eyelet processing 3. Sheets of porous fiber mesh 4. Metallic thin film sheet 5. Adhesive 6 Margins

Claims

1. A cover sheet that prevents condensation and is made of a porous fiber mesh sheet with a thin metal film sheet made of glass cloth and aluminum foil with a double-sided corrosion prevention coating attached to one side.

2. The cover sheet described in claim 1, characterized in that the metal thin film sheet is cut to fit the folding size when it is attached to the porous fiber mesh sheet, and gaps are provided on all four sides of the metal thin film sheet, allowing it to be folded when stored.

3. The cover sheet according to claim 2, characterized in that when the metal thin film sheet is cut, it is angled to form a parallelogram, and gaps are provided on all four sides of the metal thin film sheet, allowing it to be folded when stored.

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