JPH1096165A - Sheet and curtain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sheet having high durability even in a low temperature condition of winter, etc., excellent in flame resistance and transparency, and useful for a curtain, etc., by performing lamination, etc., of a specific resin composition on a fiber textile having a prescribed scale of mesh. SOLUTION: This sheet is obtained by laminating a resin composition comprising 100 pts.wt. resin such as polyvinyl chloride, 30-80 pts.wt. primary plasticizer such as n-octyl phthalate and 1-15 pts.wt. antimony oxide having <=100μm particle diameter, on a fiber textile of a polyester fiber, etc., having 2-50mm scale of mesh or impregnating the resin composition in the textile. Moreover, a curtain is preferably produced by the sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet having a high degree of transparency and flame retardancy, as well as excellent flexibility at low temperatures and resistance to bending fatigue, and a curtain comprising the sheet.

[0002]

2. Description of the Related Art Conventionally, polyvinyl chloride resin (PVC resin) has been used as a sheet for partition curtains and the like.
Mixed with a primary plasticizer composed of a phthalic ester such as di-2-ethylhexyl phthalate (DOP) and a flame-retardant secondary plasticizer of a phosphoric ester such as tricresyl phosphate (TCP) One using a composition is known.

[0003]

The flame retardancy and transparency can be enhanced by blending a large amount of TCP. However, TCP has poor weather resistance, especially low temperature fatigue (low temperature characteristics).
Therefore, when used for a curtain or the like, there is a problem that the sheet becomes fatigued due to sheet bending accompanying opening and closing, resulting in insufficient durability.
Conversely, if the mixing ratio of DOP is increased, the low-temperature characteristics are improved, but sufficient flame retardancy cannot be obtained. In view of the above, it is an object of the present invention to provide a sheet having flame retardancy, high transparency, and high durability even at a low temperature in winter, and a curtain made of the sheet. It is in.

[0004]

SUMMARY OF THE INVENTION The present invention relates to
mm of fiber cloth, 100 parts by weight of resin, primary plasticizer 3
The present invention relates to a sheet laminated or impregnated with a resin composition comprising 0 to 80 parts by weight and 1 to 15 parts by weight of antimony oxide having a particle diameter of 100 μm or less, and a curtain comprising the same.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The size of a fiber fabric must be 2 to 50 mm, and particularly preferably 3 to 10 mm. If the mesh size is too large, the durability and mechanical strength of the sheet will be insufficiently improved, and if it is too small, the transparency will be insufficient. The fiber material constituting the fiber cloth used in the present invention is not particularly limited, and examples thereof include polyester fibers (including wholly aromatic polyester fibers), polyvinyl alcohol fibers, polyolefin fibers, and polyamide fibers. Can be used. From the standpoint of flame resistance, it is preferable to cross-weave flame-retardant fibers (such as flame-retardant polyester fibers), and the fiber constituting the fabric is preferably at least 30% by weight, more preferably at least 60% by weight.
As described above, it is preferable that the flame-retardant fiber, especially the flame-retardant polyester fiber, account for at least 80% by weight. As the flame-retardant polyester fiber, it is preferable to use a fiber made of a polyester obtained by copolymerizing a phosphorus-based monomer (phosphene compound). For example, JP-A-53-56250, JP-A-63-15823, JP-A-1-266
No. 219, JP-A-5-302024 and the like. In particular, a fiber made of a polyester obtained by copolymerizing a carboxyphosphinic acid monomer, particularly a 2,5-dioxo-1,2-oxaphospholane, as disclosed in JP-A-5-302024 is preferred.

[0006] Such a flame-retardant copolyester fiber is easily melted when in contact with a flame, and is so-called melt-drop, so that it is difficult to spread. The content of the phosphorus-based monomer (in terms of phosphorus atoms) is preferably from 1,000 to 10,000 ppm. Generally, when a fabric using a flame-retardant copolymerized polyester fiber is processed with a resin, the flame-retardant effect of the fiber itself is often impaired, but in the present invention, an excellent flame-retardant effect is obtained. It is also possible to use a flame-retardant polyester fiber into which a flame retardant has been kneaded, but in order to obtain sufficient flame retardancy, the kneading amount must be increased, and the strength of the polyester fiber Therefore, it is often preferable to use a copolymer type flame-retardant polyester fiber.

[0007] The fibers may suitably contain titanium oxide, kaolin, silica, barium sulfate, carbon black, pigments, antioxidants, ultraviolet absorbers, light stabilizers and the like.
The fiber form is preferably a filament yarn from the viewpoint of strength and transparency, and it is particularly preferable to use a woven fabric (plain weave, especially leno weave, etc.) woven from the filament yarn. From the viewpoint of transparency and reinforcement, the denier of the yarn constituting the fabric is 500 to
It is preferable that the number of yarns to be driven is about 1 to 15 / in, and the cover factor is 100 to 500. The cover factor is obtained by calculating the product of the square root of the denier of the fabric constituting yarn and the number of fibers to be driven between inches in each of the vertical direction and the horizontal direction, and is represented by the sum of the calculated values.

[0008] The type of resin applied to the fabric is not particularly limited, but it is preferable to use a resin having high transparency.
It is preferable to use a polyvinyl chloride resin (PVC) from the viewpoint of transparency, flame retardancy, strength, economy and the like. Also,
The primary plasticizer used in the present invention is blended in an amount of 30 to 80 parts by weight, preferably 40 to 70 parts by weight, based on 100 parts by weight of the resin to be applied to the fiber cloth. If the proportion of the primary plasticizer is too low, the low-temperature properties become insufficient, while if it is too high, various properties such as flame retardancy and strength are reduced.

The primary plasticizer referred to in the present invention is the fifteenth to fifteenth of "Plasticizer-Theory and Application", published on March 1, 1973 (editor Koichi Murai, published by Kosho Shobo). 16
In the solubility parameter calculated from the constituent atomic groups of the plasticizer proposed by small on the page, the absolute value of the difference from the solubility parameter of the resin applied to the fiber cloth is 0.3 to 1 0.8 and a freezing point temperature of -20 ° C
Refers to the following plasticizers. For example, when a polyvinyl chloride resin (solubility parameter 9.7) is used, it refers to a plasticizer having a solubility parameter of 7.9 to 11.5 and a freezing point temperature of -20 ° C or lower. When a polyvinyl chloride resin is used, for example, phthalic acid esters such as n-octyl phthalate and di-2-ethylhexyl phthalate, and aromatic carboxylic acid ester plasticizers such as trioctyl trimetate Can be preferably used.

A plasticizer other than the primary plasticizer may be used in combination. In this case, the amount of the total plasticizer including the primary plasticizer is added to the fabric in view of flame retardancy and low-temperature characteristics. Resin 1
It is preferably 80 parts by weight or less based on 00 parts by weight. Particularly, it is preferable to use a cold-resistant secondary plasticizer such as dioctyl adipate and butyl oleate in order to further improve the low-temperature characteristics and / or a flame-retardant plasticizer such as tricresyl phosphate for improving the flame retardancy. Preferably, it is 50% by weight or less, particularly 20% by weight or less of the primary plasticizer in view of the balance between low-temperature characteristics and flame retardancy.

In the present invention, 1 to 15 parts by weight, preferably 2 to 10 parts by weight, of antimony oxide is added to 100 parts by weight of the resin applied to the cloth. If the blending ratio of antimony oxide is too high, not only does the flame retardancy not improve so much, but also the transparency becomes insufficient. Conversely, if the blending ratio is too low, sufficient flame retardancy cannot be obtained. The particle size of antimony oxide is 100 μm or less, preferably 50 μm or less. If the particle size is too large, the light scattering property is increased and transparency is impaired. As antimony oxide to be used,
Antimony pentoxide, antimony trioxide and the like can be mentioned, but from the viewpoint of transparency, antimony pentoxide is more preferable. In addition, other additives may be blended, an antifouling agent, a water repellent,
Oil repellents, antioxidants, ultraviolet absorbers, light stabilizers, pigments and the like can be used. The particle size is measured by taking an electron micrograph after sheeting.

The method for applying the resin composition to the fiber cloth is not particularly limited, and examples thereof include a roll coat method and a knife coat method.
A tar method, a dipping method and the like can be applied. Among them, it is preferable to laminate a film made of a resin composition on a cloth. The thickness of the film is 0.1-1 mm, especially 0.2-
The thickness is preferably 0.5 mm, and more preferably a film is laminated on both sides of the fabric.

In order to prevent the invasion of insects such as mosquitoes, the present inventors shield the transmission of light in the ultraviolet wavelength range of 250 to 400 nm and have a maximum reflection in a specific wavelength range of the visible region. It has been found that it is preferable to use such a sheet. Specifically, the main reflection wavelength (maximum reflection wavelength) in the visible region of 400 to 700 nm is 550 ± 50 nm, 25
Sheets having a light transmittance of 1% or less in the ultraviolet region from 0 to 400 nm are preferred. Such a sheet has an excellent repellent effect on insects. As a method for obtaining such a sheet, for example, a method in which a yellow or orange pigment and / or dye is appropriately mixed and adjusted with the resin composition is mentioned. Even in this case, antimony oxide having a diameter of more than 100 μm is blended. In such a case, light scattering occurs largely, so that an excellent insect repellent effect as in the present invention cannot be obtained. Also, 6
Increasing the reflectance in the wavelength region exceeding 00 nm has little effect on the insect repellent effect.

The sheet of the present invention can be used for various purposes, for example, as a heat insulating coating material such as a pool, and particularly for a curtain (partition curtain between plants in a plant, a plant). (Including a sheet-like shutter that is installed at an entrance or the like that opens and closes up and down, left and right, etc.).

Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto.

【Example】

[Flame retardancy] Pass / fail was determined in accordance with Article 4, 3.4.7 of the Fire Services Act Enforcement Regulations. [Transparency] 40cm wide x 40cm deep x 70cm high
A National PRF-500W reflex lamp is installed in the upper part of the black box through a slider, and a transmissivity measuring device equipped with an illuminometer is installed in the lower part of the lamp so that the illuminance without a sheet becomes 20,000 lux. After the adjustment, a sheet was inserted between the lamp and the illuminometer, and the illuminance lux at that time was measured to calculate the light transmittance. [Low temperature characteristics] JIS K-6545 flex resistance at low temperature
Was determined according to the bending resistance test method (under an atmosphere of −10 ° C.).

[Maximum reflection wavelength nm] 400 to 700 n
Using a spectrophotometer capable of measuring the reflectance in the m range, a sheet sample was attached to the sample side, a magnesium oxide standard white plate was attached to the control side, and the reflectance at a wavelength of 400 to 700 nm was measured. The wavelength showing the maximum reflectance is the maximum reflection wavelength. [Ultraviolet transmittance%] Using a spectrophotometer capable of measuring the light transmittance in the wavelength range of 250 to 400 nm, the wavelength to transmittance were measured using a sheet sample on the sample side and a blank on the control side. At the maximum transmittance.

[Example 1] Warp yarn 500 denier / 48
Filament, weft 1000 denier / 96 filament polyester filament (Kuraray Co., Ltd.)
Using a leno weaving structure, the yarn driving density between inches was 10 denier 500 denier yarns (500 deniers x 5 as a set of 2 yarns), and 7 horizontal weaves were woven (mesh vertical length). 4 mm, horizontal 5 mm). The cover factor was 380. Next, 100 parts by weight of a PVC resin (Geon103EP: manufactured by Zeon Corporation), 55 parts by weight of di-2-ethylhexyl phthalate, 6 parts by weight of antimony pentoxide (NA-3010: manufactured by Nissan Chemical Industries), and 3 parts by weight of a stabilizer were blended. A film having a thickness of 0.35 mm was formed using an inverted L calendar, and the film was heated on both sides of the cloth at a temperature of 170-1.
Heat lamination at 80 ° C. gave a sheet of the present invention. The solubility parameter of di-2-ethylhexyl phthalate
The tar was 8.3, the freezing point temperature was -55 ° C., and the obtained sheet was observed with an electron microscope. As a result, the particle size of antimony pentoxide was 30 μm. The obtained sheet had excellent flame retardancy, high transparency (light transmittance) as high as 78%, and had no cracks even at low temperature characteristics even after 1,000 times of fatigue. Using this sheet, an industrial open / close partition curtain was made and used for 12 months (approximately 25 open / close times per day). Was something.

[Comparative Example 1] PVC resin (Geon 103)
(EP: manufactured by Zeon Corporation) 100 parts by weight, 35 parts by weight of DOP, 25 parts by weight of TCP and 3 parts by weight of a stabilizer were used in the same manner as in Example 1 except for using a resin composition. Although the flame retardancy was high and the transparency (light transmittance) was excellent as much as 79%, cracks occurred on the PVC surface with less than 100 bendings, and the low-temperature properties were insufficient. Using this sheet, an industrial open / close partition curtain was made and used for one month (approximately 25 open / close operations per day). However, cracks occurred and durability was problematic. Was.

[Example 2] 3 parts by weight of the resin composition used in Example 1 and 100 parts by weight of a resin which gives an orange pigment (azo-based fast orange) to the cloth, and benzotriazo -Ultraviolet absorbers
The same procedure was performed as in Example 1 except that 5 parts by weight was added. The maximum reflection wavelength was 520 nm (37%), and the ultraviolet transmittance was less than 0.5%. Using this sheet, an industrial open / close partition curtain was made and used for 12 months (approximately 25 open / close times per day). Was something.

REFERENCE EXAMPLE The sheet obtained in Example 2 was used to form two sides and one upper surface, and was used in Example 1.
The other three surfaces were sewn on a rectangular parallelepiped of 50 cm on each side, and 50 mosquitoes were put in the case and left for 1 hour. 24 were flying in the space, and the rest were all examples. Only one sheet was obtained, and the sheet of Example 2 had an extremely excellent insect repellent effect.

[0021]

The sheet of the present invention has excellent flame retardancy, low-temperature characteristics and transparency, and particularly when used as a curtain (shutter), excellent effects can be obtained.

Claims (2)

[Claims] Claims 1. A resin 1 is added to a fiber cloth having a mesh size of 2 to 50 mm.
00 parts by weight, primary plasticizer 30 to 80 parts by weight, particle size 1
A sheet laminated or impregnated with a resin composition comprising 1 to 15 parts by weight of antimony oxide having a size of not more than 00 μm. 2. A fiber cloth having a mesh size of 2 to 50 mm and a resin 1
00 parts by weight, primary plasticizer 30 to 80 parts by weight, particle size 1
Curtain comprising a sheet laminated or impregnated with a resin composition comprising 1 to 15 parts by weight of antimony oxide having a size of not more than 00 µm.