JPH0121998Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a shade material sheet. More specifically, the present invention relates to a shade material sheet that has not only light shielding properties and ventilation properties but also flame retardant properties and weather resistance.

(Conventional technology) Tent materials have been used since ancient times to protect against rain, dew, cold and heat, but recently they have also been used as structural materials for buildings such as air domes and for high-altitude mountain climbing, and the performance requirements for tents have improved. It is expanding.
Tents are usually classified into three types: leisure tents, eaves tents, and large tents, and they are roughly divided into these three types in terms of functionality. In addition to properties as a waterproof fabric, leisure tents are also required to be lightweight and have breathability. In addition, tents with eaves tend to require fashionability as part of the decoration of architectural structures, but for this purpose, unlike leisure tents, waterproof performance is required rather than breathability. Furthermore, in large tents, flexible materials are used as part of architectural structures such as air domes, and there are strong demands for mechanical properties and weather resistance.
As described above, the properties required of a tent differ depending on the use, but the sheets used as sunshade tents are usually selected from among the above-mentioned tent materials.

(Problems to be solved by the invention) In this invention, shade material refers to a sheet material used for purposes such as sunshading and blindfolding, but its usage forms include sunshade tents that replace roofs and eaves, eaves tents, There are also screens, fences, etc. that replace the traditional bamboo blinds and Yoshizu. In the summer, when sunshade sheets are particularly needed, there is a strong demand for both light blocking and ventilation, but none of the above-mentioned materials can satisfy both light blocking and ventilation. There is a need for a sheet that has both ventilation and air permeability. Furthermore, when using shade wood as part of a building structure, it must meet prescribed fireproofing standards, and it must also have weather resistance that can withstand long-term outdoor use. Flame retardant as well as breathable
The emergence of sheets that are weather resistant is expected.

The present invention uses a woven or knitted interlining in which glass fiber threads are arranged at intervals in the weft and warp directions as a base fabric, and ventilation holes are left in the base fabric so that the porosity is 5 to 64%. The object of the present invention is to provide a shade material sheet formed by layering a fluororesin composition on one or both sides and heat-treating the layer.

(Means for solving the problem) The present inventors arrived at the present invention as a result of various studies.

The shade material sheet of the present invention will be explained below with reference to the drawings. FIG. 1 is a partially enlarged plan view showing an example of the sheet of the present invention. In the figure, 1 is a sheet body according to the present invention, and the sheet body 1 is made of a woven or knitted base fabric 2 in which warp threads 3 and weft threads 4 made of glass fiber threads are arranged at intervals in the warp and warp directions. The surface of the interlining 7 is impregnated or coated with the fluorine-based resin composition 5, but in this case, the interlining 7 is not formed with an impermeable coating treatment, but is formed by intersecting the interlining 7. After carrying out coating treatment by selecting the yarn used and the amount of fluorine-based resin composition 5 deposited, etc., so as to leave the ventilation holes 8 with a porosity of 5 to 64% without filling the gaps between them. , heat treatment is performed to form the covering layer 6.

Here, the porosity is the ratio (%) of the area of the ventilation holes 8 to the total area in the projected view of the sheet plane.
It is. The porosity is set by balancing the requirements for light-shielding properties and ventilation properties of the shade material sheet.
The light-shielding property is influenced not only by the porosity of the sheet but also by the light transmittance of the sheet material, the reflectance of the sheet surface, etc., and the light transmittance and reflectance are largely controlled by the color of the sheet material. Generally, it is expected that there will be a requirement for a light shielding rate of 20 to 90% and a light transmittance of 10 to 80%. Considering the transmittance and reflectance of the material itself, the sheet porosity is approximately 5 to 64. %Is required.
In the case of plain weave, this porosity can be achieved by setting the ratio of the width of the yarn bundle to the width of the gap between the yarn bundles to approximately 4/1 to 1/4. Ventilation improves as the porosity increases, and even if the porosity is the same, the diameter of the ventilation holes increases, but since it has an inverse relationship with light-shielding properties, the balance between both performances, including the sheet color, must be balanced. Determine the size of the vent.

In this way, the coating treatment is performed so as to leave predetermined ventilation holes 8 in the gaps between the interlining 7 made of the base fabric 2, but the fluorine-based resin composition 5 aggregates at the intersections 9 of the interlining 7. It has a general structure in which the vent hole 8 is layered and has a ventilation hole 8 having a predetermined diameter.

In the present invention, nonflammable glass fibers are used as the fibers constituting the interlining 7 of the base fabric 2. Also,
Examples of the fluorine-based resin layered on the coating layer 6 include polytetrafluoroethylene, a copolymer of tetrafluoroethylene and hexafluoropropylene, a copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether, polychlorotrifluoroethylene, and tetrafluoroethylene. A resin composition whose main component is one selected from copolymers of fluoroethylene, hexafluoropropylene, perfluoroalkyl ether, etc. can be used. These fluorine-based resin compositions inherently have excellent weather resistance and water repellency, and are suitable for long-term outdoor use.

After the resin composition 5 as described above is layered on the base fabric 2 of the interlining 7 by impregnation or coating, it is laminated and fixed by heat treatment. When the resin composition 5 is layered on the surface of the interlining 7, it aggregates on the intersecting portions 9 of the interlining 7 and forms a conjugated state, but since the resin composition 5 has a structure in which at least ventilation holes 8 are formed, it is impermeable. No processing shall be applied. That is, it is necessary to perform layering processing within an appropriate range so as to maintain a desired ventilation state according to the intended use and ensure that air permeability remains.

In the present invention, in order to achieve both the desired light shielding properties and ventilation properties, a hydrophobic substance with a large contact angle, which is a characteristic of fluorine resin, is applied to the surface of the interlining 7 of the base fabric 2 without impairing the breathability of the base fabric. However, the composition of the fluorine-based resin composition 5 can be appropriately selected depending on the structure of the woven or knitted material constituting the base fabric 2, the thickness of the yarn, etc., and the amount of adhesion is 5 to 200 g/ ^m2. A range of is appropriate.

In addition, by adding a pigment to the fluororesin composition, it is possible to color the sheet to adjust its light-shielding properties; Alternatively, colored yarn may be used, or a sheet may be colored.

(Effects of the invention) This invention uses nonflammable glass fiber base fabric as the interlining.
The surface is coated with a fluorine-based resin composition in a range that allows ventilation to remain and is heat-treated to provide the desired light-shielding properties and ventilation, so it does not leak in the summer and provides appropriate light-shielding and shielding. It has a thermal effect. In addition, unlike conventional coating layers of synthetic fiber materials with added flame retardants, ultraviolet absorbers, etc., this invention is stable over a long period of time, and has excellent flame retardant and weather resistance as well as ventilation and light blocking properties. Due to its unique characteristics, it can be used as part of a wide range of architectural structures, including terraces and shades.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged plan view showing an embodiment of the present invention. 1... Sheet body, 2... Base fabric, 3... Warp,
4... Weft, 5... Fluorine resin composition, 6... Covering layer, 7... Interlining, 8... Ventilation hole, 9... Crossing part.

Claims (1)

[Scope of utility model registration request] The base fabric is a woven or knitted interlining in which yarns made of glass fibers are arranged at intervals in the warp and warp directions, and ventilation holes are left in the base fabric so that the porosity is 5 to 64%. A shading material sheet characterized by being formed by layering a fluorine-based resin composition on a fluorine-based resin composition and heat-treating the fluorine-based resin composition.