JP2750326B2 - Laminated sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a function of absorbing dew water generated in beams, ceilings, windows, window frames, walls, piping pipes, etc. of building structures and quickly evaporating the dew water thus absorbed. It relates to a laminated sheet.

[0002]

2. Description of the Related Art Many laminated sheets that absorb water and moisture have been known. However, these laminated sheets are intended to absorb water using a highly water-absorbing resin, and generally do not have a function of evaporating and removing the absorbed water.

Therefore, when such a laminated sheet is used by attaching it to a window glass or a window frame where dew condensation water is generated due to a difference in temperature between the inside and outside of the room, if the sheet is left as it is even after the water absorption of the sheet is saturated, Absorbed water may flow down to floors, carpets, tatami mats, etc. and penetrate into the inside of the tatami, causing mold to develop, and the place may become rotten. there were.

[0004] In view of such a defect of the conventional water-absorbing laminated sheet, the present inventors have a combination of water absorption and evaporability, which has a function of sufficiently absorbing water and evaporating the absorbed water. As a laminated sheet (tape) (hereinafter referred to as a laminated sheet) capable of exhibiting its effects over a long period of time, a water-absorbing sheet made of rayon, cotton, nylon, or the like and a woven cloth having a large surface area are used. ,
A laminated sheet made of an evaporable sheet made of a nonwoven fabric or the like has been proposed (Japanese Utility Model Laid-Open No. 63-92732, Japanese Utility Model Laid-Open No. 1-177250).

[0005]

However, at the time of low temperature in winter, that is, when the temperature difference between the inside and outside is particularly large, the water absorbed by the water-absorbent sheet layer is also volatile. Because the rate of evaporation from the sheet layer is reduced, a large area of sheet or tape must be used where continuous condensation occurs. This causes a problem that the function of water absorption and evaporation cannot be fulfilled due to freezing.

[0006] In view of the above problems, the present inventors have studied the structure of the laminated sheet in order to promptly evaporate the absorbed water, and as a result, have reached the present invention.

[0007]

That is, the present invention relates to a laminated sheet comprising a fiber layer A for absorbing dew condensation water and a fiber layer B for evaporating water absorbed by the fiber layer A. A laminated sheet characterized by having a heat storage component in at least one of A and the fiber layer B, wherein titanium black and carbon black or Zr, Si, Ti and other carbides, nitrides and oxides are used as heat storage components. Using an acrylic or polyester heat storage fiber containing ceramics in the form of Zr, Si, Ti
Forming a coating film of a polyester or acrylic synthetic resin containing ceramics in the form of carbides, nitrides, and oxides.

[0008]

The laminated sheet according to the present invention has both a fiber layer A for absorbing the condensed water (hereinafter referred to as a water-absorbing fiber layer A) and a fiber layer B for evaporating the absorbed water (hereinafter referred to as an evaporated fiber layer B). , Or by incorporating heat storage fibers as a heat storage component in one of the fiber layers, or by forming a heat storage coating film, the heat storage component exhibits light absorption heat storage performance and absorbs solar energy. At the same time, by imparting the property of converting this to heat energy and storing heat, compared to the above-described laminated sheet containing no heat storage component, evaporation of absorbed water is reduced by 20 to
30% can be promoted, and freezing of the water absorption can be prevented by the heat retained by the heat storage component even at night in a severe cold region. In addition, there is an effect that the surface area of the sheet used can be reduced because water-absorbed water can be evaporated more quickly.

In the present invention, as the water-absorbing fiber layer A, a single or mixed-woven knitted fabric, woven fabric, or non-woven fabric of fibers such as rayon, cotton, hemp, wool, nylon, and vinylon is used. Porous, large surface area, low water absorption, high density and easy to cause capillary action.For example, woven or nonwoven fabrics made of single or mixed fabrics of polyester, polypropylene, acrylic, nylon, etc. are used. Ultra-fine fibers of 0.5 denier or less and ultra-fine fibers of 0.1 to 0.2 denier or less are suitable.

The heat storage fibers used as a mixture with at least one of the water-absorbing fiber layer A and the evaporating fiber layer B are titanium black (TiO) and carbon black (channel black,
Acrylic light-absorbing and heat-storing synthetic fiber containing 0.05 to 10% by weight of an acrylic synthetic fiber in a ratio of 1/99 to 50/50 (weight ratio).
Particle size 20 in the form of carbide, nitride such as r, Si, Ti, etc.
Polyester-based or acrylic-based heat storage synthetic fibers containing 0.3 to 10% by weight of ceramic fine powder having a size of not more than μm are suitable.

As the heat storage fiber, a spinning stock solution obtained by mixing a required amount of titanium black and carbon black or a required amount of the above ceramic fine powder with a thermoplastic synthetic polymer such as an acrylic or polyester is used. Obtained by a conventional synthetic fiber manufacturing process such as a dry or wet-wet method, for example, acrylic heat storage synthetic fiber (trade name, Thermo Catch) manufactured by Mitsubishi Rayon Co., and polyester heat storage synthetic fiber (product name) manufactured by Unitika Ltd. Name, solar α) and the like can be used.

These heat storage fibers can store heat not only by solar energy but also by lamps having a heat ray light source such as incandescent lamps and infrared lamps. Therefore, heat storage components such as the above-mentioned titanium black, carbon black and ceramic fine powder can be stored. The content is preferably large within a range that does not adversely affect the spinnability.

When the heat absorbing fiber is contained in the water absorbing fiber layer A, the mixing ratio of the water absorbing fiber and the heat storing fiber is 95/5 to 50/50.
50 (weight ratio) is preferred. This is because the amount of heat storage fiber is 5
%, The mixing effect of increasing the evaporation rate cannot be expected to be great, and if it is 50% or more, the cost is high and practicability is lacking. For the same reason, the mixing ratio when the heat storage fiber is mixed with the evaporated fiber layer B may be the same as the above.

The laminated sheet obtained by joining the water-absorbing fiber layer and the evaporating fiber layer according to the present invention may be any one as long as the heat-storing fiber is blended into either the water-absorbing fiber layer or the evaporating fiber layer. When used in a place where a large amount of water is generated, or when it is desired to evaporate the condensed water that has absorbed water more quickly, heat storage fibers may be added to both fiber layers in order to increase the heat storage amount.

For joining the water-absorbing fiber layer and the evaporating fiber layer, a joining method may be used such that the laminated sheet obtained by joining has a form that sufficiently retains air permeability.
Method using adhesive such as spray bonding, needle punch,
Conventionally, nonwoven fabric manufacturing methods such as mechanical methods such as stitching and entanglement of fibers by applying jetting fluid of appropriate pressure can be used. The water jet method using water as a fluid is the most preferable in terms of performance and cost.

The laminated sheet containing a heat storage component according to the present invention can be obtained by joining at least one of the water absorbing fiber layer A and the evaporating fiber layer B with the heat storage fiber as described above. The water-absorbing fiber layer A and the evaporating fiber layer B are joined by the above-described joining method to obtain a laminated sheet, and then the laminated sheet is dispersed in an aqueous synthetic resin liquid in which ceramic powder such as ZrC or SiC is dispersed as a heat storage component. Or a resin liquid containing the heat storage component is formed on the fiber surface of the laminated sheet by dipping or spraying the resin liquid. And in the case of this form, the heat storage property can be possessed on both surfaces of the laminated sheet. However, if the resin film thickness is large, the water absorption may decrease, so it is preferable to adjust the coating amount.

The laminated sheet obtained according to the present invention is used at locations where dew condensation water is generated, such as roof beams and ceilings, piping pipes, windows, and window frames, to prevent the dew condensation water from dropping and flowing down. Various adverse effects can be prevented. In addition, when using this laminated sheet, the separator on the back surface of the water-absorbing fiber layer A may be peeled off and attached with an adhesive layer. Further, the laminated sheet of the present invention may be used in the form of a tape, and this form is also included in the present invention.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments. Example 1 Rayon fibers and acrylic heat storage fibers (manufactured by Mitsubishi Rayon Co., Ltd., trade name: Thermocatch) constituting the water-absorbing fiber layer A were mixed in 7 pieces.
0/30 (weight ratio) on the conveyor screen,
The water-absorbing fiber layer in the laminated sheet obtained by entangled lamination has a thickness of 4 m
m, mix about twice that amount and put
Further, a 90/10 (weight ratio) polyester ultra-fine fiber and an acrylic thermal storage fiber thermocatch constituting the evaporative fiber layer B were further mixed and overlapped so as to have a thickness of 2 mm. Thereafter, the two fiber layers are entangled by a water jet method in which water is applied as a high-pressure jet stream from a nozzle on the conveyor screen to the superposed fiber layers to form a two-layer structure of a water-absorbing fiber layer and an evaporating fiber layer. A laminated sheet with heat storage fibers entangled in the layer was obtained.

Example 2 Polyester ultrafine fibers were layered as a vaporized fiber layer B to a thickness of 2 mm on a fiber layer A having the same structure as in Example 1, and both fibers were formed by the same water jet method as in Example 1. The layers were entangled to obtain a laminated sheet.

Example 3 A mixture of acrylic fiber and ZrC powder having a particle diameter of 1 μm in an amount of 5% by weight and melt-spinning was used to obtain a 50/50 (weight ratio) polyester-based heat storage fiber (solar α, manufactured by Unitika). A nonwoven fabric having a thickness of 5 mm constituting the water-absorbing fiber layer A mixed at a ratio and a nonwoven fabric having a polyester ultrafine fiber thickness of 2 mm as the evaporating fiber layer B were overlapped with each other by a needle punching method to obtain a laminated sheet.

Example 4 Polyester fiber and acrylic heat storage fiber (Thermo Catch, manufactured by Mitsubishi Rayon Co., Ltd.) were mixed at a ratio of 60/40 (weight ratio) to a thickness of 6 mm to form a water-absorbing fiber layer A, and evaporated on the layer. As the fiber layer B, polyester ultrafine fibers were stacked so as to have a thickness of 3 mm, and both fiber layers were entangled by the same water jet method as in Example 1 to obtain a laminated sheet.

Example 5 Rayon fibers are placed on a conveyor screen so as to have a thickness of 5 mm as the water-absorbing fiber layer A, and the polyester ultra-fine fibers and the polyester heat storage fibers (solar α, 70/30)
(Thickness ratio) and the thickness was 3 mm. Then, both fiber layers were entangled by a water jet method to obtain a laminated sheet.

EXAMPLE 6 A 3 mm thick nonwoven fabric made of rayon fiber as the water-absorbing fiber layer A and a 2 mm thick nonwoven fabric made of polyester ultrafine fiber as the evaporative fiber layer B were entangled by needle punching to obtain a laminated fiber. I got a sheet. Next, this laminated fiber sheet was immersed in an aqueous polyester resin liquid in which 10% of ZrC powder having a particle size of 1 μm was dispersed.
After drying for 0 minutes, a laminated sheet of the present invention was obtained in which a coating film having a heat storage component was formed on the fibers.

COMPARATIVE EXAMPLE 1 Rayon fibers were layered as the water-absorbing fiber layer A, and polyester ultra-fine fibers were layered as the evaporating fiber layer B to the same thickness as in Example 1, and the water jet method was used in the same manner as in Example 1.
The two fiber layers were entangled to obtain a laminated sheet.

With respect to the laminated sheets obtained in Examples 1 to 6 and Comparative Example 1, the following measurement was carried out in order to check the rate of evaporation of the water absorbed by the water-absorbing fiber layer from the evaporation fiber layer. That is, samples of 10 cm square were prepared, and these samples were placed on a glass plate to absorb 20 g of water. Next, this glass plate was heated at (20)
No-wind room, (b) night-time incandescent light bulb 18 lit
C. room, and the time required for drying was measured while checking the weight loss until the water in each sample was completely evaporated. The results shown in Table 1 were obtained, and the laminated sheet of the present invention was obtained. It was confirmed that the heat storage fiber entangled in at least one of the layers promoted the evaporation of the water absorption.

[0026]

[Table 1]

[0027]

As described above, the laminated sheet according to the present invention has a structure in which at least one of the water-absorbing fiber layer and the evaporating fiber layer contains a heat storage component, so that the water-absorbing fiber layer absorbs water. This has a great effect that evaporation of the absorbed water from the evaporative fiber layer can be further promoted.

Claims (5)

(57) [Claims] 1. A laminated sheet in which a fiber layer A for absorbing dew condensation water and a fiber layer B for evaporating water absorbed by the fiber layer A are bonded to at least one of the fiber layer A and the fiber layer B. A laminated sheet having a heat storage component. 2. The laminated sheet according to claim 1, wherein the heat storage component is a heat storage fiber composed of polyester-based or acrylic-based fibers and titanium black and carbon black. 3. The laminated sheet according to claim 1, wherein the heat storage component is a heat storage fiber composed of polyester or acrylic fiber and ceramic. 4. The laminated sheet according to claim 1, wherein the heat storage component is a coating or a deposit of a polyester or acrylic synthetic resin containing ceramics. 5. The laminated sheet according to claim 1, wherein a release layer is formed on one side of the fiber layer A absorbing the dew condensation water via an adhesive.