JP2000008744A - Slat for blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slat which is less deformed by solar heat, is hardly broken, and prevents generation of burr of a glass fiber in a cut face or a bored face by laminating an organic fiber nonwoven fabric and a glass fiber nonwoven fabric as a fiber reinforcing material. SOLUTION: A glass nonwoven fabric is laminated on both faces of an organic fiber nonwoven fabric, or span bond composed of polyester monofilament. Secondly, it is fed on a PET film on which unsaturated polyester resin with hardener added thereto is spread and the PET film is stacked thereon while impregnating the resin. Thirdly, while these nonwoven fabric, the resin, and the film are continuously moving, these are heated in a heating and cooling furnace, hardened, and cooled down to the room temperature. In this case, the diameter, the length, and the surface density of the glass fiber constituting the glass fiber nonwoven fabric are set to 3-25 μm, 3-12 mm, and 20-80 b/m2 respectively. This constitution can improve the smoothness of the end face bored by a press, is superior in plastic deformation resistance, dimension stability, and heat insulating performance, and changes light into a diffused light by a shade effect so as to lighten the whole room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blind slat.

[0002]

2. Description of the Related Art Horizontal blinds installed inside windows,
Alternatively, the Venetian blind can adjust the amount of light collected indoors by adjusting the angle of a slat or louver suspended from the head box via a ladder cord. Such a horizontal blind slat is required to have a light shielding property and a heat insulating property, and it is desirable to provide a warm texture and texture to the occupants.

[0003] The slats usually used are mainly those coated on a thin plate of an aluminum alloy. Such a slat has excellent light-shielding properties, but does not have sufficient heat insulating properties and texture. In addition, radio interference at the time of shielding is generated. For this reason, a slat having improved heat insulation, reduced cooling sensation, and soft appearance has been disclosed in
In Japanese Patent Application Laid-Open No. 117238/1995, a woven fabric or a nonwoven fabric is impregnated with a thermoplastic resin and then molded into a slat cross-section with a curved surface. Impregnated or heat-set polyester monofilament woven fabrics have been developed in JP-A-58-11286.

However, Japanese Patent Application Laid-Open No. 53-117238 discloses
As disclosed in Japanese Patent Application Laid-Open No. 1-121490, a material obtained by impregnating a woven or nonwoven fabric with a thermoplastic resin and then forming it into a curved surface shape lacks heat resistance and dimensional stability. In the case of using a woven fabric, the end of the fiber bundle of the glass fiber yarn or strand cannot be cut cleanly on the cut surface or the perforated surface and remains in a slightly protruding form. For this reason, lifting cords, ladder cords, horizontal cords, etc. for raising and lowering the slat, opening and closing adjustment, rub against the protruding fiber bundle parts and damage the cord fibers, and the cords become fluffy and cut as the number of adjustments increases Therefore, it is necessary to smooth the edges. JP-A-58-11
A material using an organic material, such as a polyester monofilament woven fabric described in Japanese Patent No. 286, which is heat-fixed, tends to bend because of its low rigidity, is thermally deformed by solar heat, and lacks heat resistance.

[0005]

SUMMARY OF THE INVENTION The present inventors have conducted various trial productions to develop a slat having a heat-insulating property and a warm texture in place of a slat coated on a thin plate of an aluminum alloy. As a result, slats made of thermosetting resin using only organic fiber nonwoven fabric as reinforcing fibers are easy to bend,
When installed near a window, it tends to warp and twist due to the rise in temperature due to solar heat, which is problematic in appearance, and those using only glass fiber nonwoven fabric are fragile and easy to break, so they are easily broken when subjected to external force It turned out to have a fatal drawback. Thus, the problem to be solved by the present invention is to develop a slat that has a warm texture, is less likely to be thermally deformed by solar heat, is less likely to break, and has no glass fiber burrs on the cut surface or perforated surface. is there.

[0006]

In order to achieve the above-mentioned object, the present invention provides a plastic film for mold release in which a thermosetting resin, an organic fiber nonwoven fabric and glass fiber nonwoven fabric are laminated on both sides or one side. Supply. Next, a thermosetting resin is impregnated and a plastic film is supplied to the uppermost layer, and the resin is cured by heating while sequentially moving on a molding die having a number of slats connected in a short direction. , Forming a curved surface with the desired slat cross section. Then, the slat is manufactured by cutting, pressing and drilling to solve the above-mentioned problem.

[0007] The organic fiber non-woven fabric used in the present invention is obtained by using a short fiber as a material, stacking card webs, blowing up in a drum, or floating in water to make a rake sheet with a net, or forming a filament into a loop. And heat-sealed as a sheet, or a braided fabric in which yarn layers arranged at equal intervals are superposed and adhered biaxially and triaxially at an angle. These fiber layers are usually formed by thermal fusion of the fiber itself, or by thermoplastic or thermosetting resin such as ethylene-vinyl acetate copolymer attached to the fiber, or by emulsion such as acrylic or vinyl acetate resin. Glued with an adhesive. Above all, in the organic fiber nonwoven fabric used in the present invention, the fiber constituted by the spun bond is a continuous fiber, which is preferable in view of a change in the strength dimension.

As the material of the organic fiber non-woven fabric, synthetic fibers such as nylon, polyester and vinylon are used, and those having a high crystallization temperature are desirable from the viewpoint of heat resistance.
20 to 200 g / m ² , preferably 40 to 100 g / m ²
g / m ² can be used. Area density is 20
g / m ² In the following, preventing breakage of the slats, small thermal deformation preventing effect, 200 g / m ^2, too thick thickness is more than the weight as slats too heavy.

The glass fibers constituting the glass fiber nonwoven fabric have a diameter of 3 to 25 μm, a length of 3 to 12 mm, and an area density of 1 to 3.
0-200 g / m ² , preferably 20-80 g / m ²
m ² can be used. These conditions are necessary for heat resistance against thermal deformation due to solar heat and the like so as not to leave glass fiber burrs on the cut surface or the perforated surface. The glass fiber nonwoven fabric is manufactured by a conventionally known method such as a method of dispersing glass fibers in water to make paper, or a dry manufacturing method using a card or the like. Area density is 10g / m
^If it is ² or less, the effect of preventing thermal deformation is small, and 200 g / m ²
Above, the thickness becomes too thick, and the weight as the slat becomes too heavy. The organic fiber nonwoven fabric and the glass fiber nonwoven fabric are desirably laminated with a glass fiber nonwoven fabric in a form of sandwiching the organic fiber nonwoven fabric from the viewpoint of preventing warpage and twisting, but even if these two types of nonwoven fabrics are laminated one by one, good.

As a resin to be impregnated into these nonwoven fabrics, an unsaturated polyester resin is suitable, but a thermosetting resin such as an acrylic resin or an epoxy resin can be used. The amount of resin adhered depends on the material and thickness of the slat,
The weight of the nonwoven fabric is preferably 30 to 150 parts by weight with respect to 100 parts by weight, and if it is 30 parts by weight or less, insufficient impregnation may occur, and if it is 150 parts by weight or more, the resin becomes too large and the dimensional stability is poor. Problems such as increased deflection.

In order to improve the flame retardancy and flame retardancy of the resin, it is desirable to add a flame retardant, and a known resin suitable for each resin may be added. In addition, it is possible to appropriately add an antistatic agent, fluorine treatment for antifouling, etc. as necessary.

[0012] Depending on the blending amount of the coloring pigment in the resin, a slat having a feeling of being almost transparent or a slat having a completely opaque feeling can be produced freely, so that the product group is more varied than conventional metal slats. Can be done.

The method of producing slats from these materials is the same as the method of producing a conventional glass fiber reinforced thermosetting resin corrugated sheet. That is, while a release film, for example, cellophane and various plastic films are continuously and horizontally moved to the lowermost layer, a thermosetting resin is flown thereon. Furthermore, a nonwoven fabric is further supplied and impregnated with resin while overlapping, and finally a release film is placed thereon, and the mold is arranged in a form that is squeezed with a mold from both sides of the film,
The impregnation is more complete than pressing down with a mold. Furthermore, it passes through a plate-like body with a notch type equal to the number of waves of the final product installed at a right angle to the flow of the flat resin-impregnated nonwoven fabric, and sequentially changes the width, depth, and curvature to obtain the cross-sectional shape of the slat. Then, a corrugated sheet having a cross section as shown in FIG. 1 or FIG.

The corrugated sheet manufactured in this way is cut into slat dimensions, perforated, etc., to form a slat.

[0015]

[Example 1] Glass nonwoven fabric 3 as nonwoven fabric
0 g / m ² (manufactured by Oji Paper Co., Ltd.) is laminated on both sides of an organic fiber nonwoven fabric made of polyester monofilament 50 g / m ² (manufactured by Asahi Kasei Corporation, spunbond), and 150 g / m ² of an unsaturated polyester resin to which a curing agent is added is added. P which spread
The PET film is supplied on the ET film and impregnated with the resin, and the PET film is further laminated thereon. The nonwoven fabric, resin, and film were heated at 120 ° C. for 10 minutes in a heating zone in a heating / cooling furnace having a large number of molds while being continuously moved, cured, and then cooled to room temperature. A slat having an arc-shaped cross section of 0.5 mm in thickness and 25 mm in width was obtained in the flow direction of the laminate.

Example 2 A glass fiber non-woven fabric was laminated on the upper surface of an organic fiber non-woven fabric to form a two-layer laminate, and the resin was 100
A slat having an arc-shaped cross section of 0.5 mm in thickness and 25 mm in width was obtained in the same manner as in Example 1 except that g / m ^{2 was} supplied.

[Comparative Example 1] The same procedure as in Example 1 was repeated except that four layers of the glass fiber nonwoven fabric used in Example 1 were supplied and 150 g / m ^{2 of} resin was supplied.
A slat having an arc-shaped cross section of m was obtained.

Comparative Example 2 A circle having a thickness of 0.8 mm and a width of 25 mm was produced in the same manner as in Example 1 except that two polyester fiber nonwoven fabrics used in Example 1 were stacked and resin was supplied at 150 g / m ^2. A slat with arcuate cross section was obtained.

Comparative Example 3 A 0.3 mm thick and 25 m wide was prepared in the same manner as in Example 1 except that one layer of glass cloth (200 g / m ² made by Nitto Boss) was used as a fibrous reinforcing material.
A slat having an arc-shaped cross section of m was obtained.

[Test] Examples 1-2 and Comparative Examples 1-3
A heat resistance test and a burr test were performed using the slats, and the results are shown in Table 1. Heat resistance test: The slats of the example and the comparative example cut to a length of 490 mm are placed on a supporting portion arranged at an interval of 270 mm so as to protrude by a length of 110 mm, and are placed at 40 ° C., 60 ° C., 80% It was left in an RH atmosphere for 24 hours, and the state of the portion protruding from the support was observed. No deformation ○, slightly deformed △, deformed ×
And Burr test: 7 mm in diameter on slats of Examples and Comparative Examples
Holes were opened with a press machine to check the presence or absence of burrs on the glass fiber. Folding resistance test: When the slat was fixed at a center distance of 500 mm and a 30 mm deflection was added to the center of the slat, the slat was evaluated as 、 when no cracking or cracking occurred, and x when there was cracking.

[0021]

[Table 1]

[0022]

The effect of the present invention is that the structure described in claim 1 provides better smoothness of the end face of the hole formed by pressing as compared with a slat using only glass cloth, and is superior to that using a glass fiber nonwoven fabric. And can't break. Aluminum alloy slats undergo plastic deformation when a force is applied, and the slats of the present invention do not undergo plastic deformation even when reworked, but return to their original shape due to elasticity when the force is removed. In addition, dimensional stability is superior to slats containing only organic fibers, and there is no warping or twisting due to solar heat.
In addition, since non-woven fabric is used, the insulation is good, the texture is not cold, patterning by printing is possible, and the use of translucent slats effectively blocks direct sunlight, but the shade effect The light becomes diffused light, and the light entering the room is soft, and the whole room becomes bright. Also, if the translucent blind is installed in the north window, even if the slat is completely closed for blindfold, it is possible to take in light as diffused light.

Claims (4)

[Claims] 1. A slat for a blind, characterized in that an organic fiber nonwoven fabric and a glass fiber nonwoven fabric are laminated as a fibrous reinforcing material in a laminate in which a fibrous reinforcing material is impregnated with a thermosetting resin. 2. The slat for a blind according to claim 1, wherein the thermosetting resin impregnated in the fibrous reinforcing material is an unsaturated polyester resin. 3. The slat for a blind according to claim 1, wherein the organic fiber nonwoven fabric is a spun bond. 4. The glass fiber nonwoven fabric has a diameter of 3-25 μm,
It is made of glass fiber with a length of 3-12 mm and has an area density of 20-
Blind slat of claims 1 to 3, wherein the a 80 g / m ^2.