JPH04208102A - Fabric for parasol and its manufacture - Google Patents

Abstract

PURPOSE:To shield from ultraviolet rays by forming a fabric for parasol or the like from a woven or nonwoven cloth consisting of natural fiber, synthetic fiber, or hybrid thereof, putting this fabric into processing with a solution or emulsion of a resin including an ultraviolet ray absorbing agent, and subjecting the resultant to the drying process. CONSTITUTION:A fabric as material to a parasol or the like may consist of a woven or nonwoven cloth made of natural fiber, synthetic fiber, or hybrid thereof. Examples of natural fiber include silk, cotton, and hemp while examples of synthetic fiber include nylon, polyester, acrylic, acetate, Aramid, etc. Examples of the resin used in processing include acrylic, polyurethane, phenol, alkid, vinyl, and Si type and F type resin. Dipping process consists of dipping the fabric in an emulsion and squeezing with rolls. A drying process after dipping is performed using a conventional drying machine.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a fabric for a parasol frame that has excellent ultraviolet shielding properties and is effective in preventing fading and deterioration of the parasol itself, and a method for manufacturing the same. .

[Prior Art] While the ultraviolet rays contained in sunlight bring about useful effects, they also cause undesirable sunburn, pigmentation, and even dermatitis.
Causes harmful effects on the human body such as skin cancer.

Conventionally, in order to avoid the above-mentioned harmful effects, parasols made of cloth such as cotton and linen have been widely used.

[Problems to be Solved by the Invention] However, the UV cut rate of fabrics used for conventional parasols is around 80 to 90% for fabrics for sun and rain vehicles, and 70 to 85% for fabrics for parasols. It was not always sufficient to avoid the harmful effects of ultraviolet rays. Another problem was that the fabric itself was subject to significant fading and deterioration due to ultraviolet rays.

The present invention provides a fabric for umbrellas that almost completely blocks harmful ultraviolet rays and has an excellent effect of preventing fading and deterioration of the fabric itself, and a method for manufacturing the fabric.

[Means for Solving the Problems] The present inventors have developed a method of treating fabrics made of natural fibers, synthetic fibers, and woven or nonwoven fabrics of blends thereof with a solution or emulsion of a resin containing an ultraviolet absorber. It has been found that by drying, the resin effectively adheres to the fibers of the fabric, resulting in a fabric for a parasol frame that can exhibit an excellent ultraviolet shielding effect, and has completed the present invention.

That is, the present invention provides a fabric for a parasol frame, characterized in that a resin containing an ultraviolet absorber is attached to the fibers of a fabric made of natural fibers, synthetic fibers, and woven or nonwoven fabrics of blends thereof. It is something. Furthermore, the present invention is characterized in that a fabric made of natural fibers, synthetic fibers, and woven or nonwoven fabrics made of blends thereof is treated with a solution or emulsion of a resin containing an ultraviolet absorber, and then dried. , provides a method for manufacturing a fabric for a parasol frame in which the resin is attached to the fibers of the fabric.

Parasols manufactured using the fabric of the present invention include parasols, sun and rain vehicles, beach umbrellas, tents, and the like.

The fabric used as the raw material for the parasol frame fabric may be either a woven fabric or a non-woven fabric, and may also be made of natural fibers, synthetic fibers, or a blend thereof. The vine natural fibers used include silk, cotton, linen, and the like. Examples of synthetic fibers include nylon, polyester, acrylic, acetate, aramid, etc., and nylon and polyester are generally used.

Resins used for treatment include acrylic resin, polyurethane resin, phenol resin, alkyd resin, vinyl resin,
Examples include silicone resins and fluororesins. Among these, in the case of coating, acrylic resins are particularly preferred from the viewpoints of resistance to color migration of fabric, cost, weather resistance, and waterproof properties. Further, in the case of dipping, it is preferable to use polyurethane resin in terms of weather resistance and abrasion resistance.

As the ultraviolet absorber contained in the resin, p-1eft
-butylphenyl salicylate, 2-hydroxy-4-
Methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2'-(2'-hydroxy-5
'-Methylphenyl)benzotriazole, 2- (2
'-Hydroquine-3'-1eft-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-
(2'-hydroxy-3'.

Salicylic acid UV absorbers such as 5'-di-tert-butylphenyl)benzotriazole, phenyl salicylate, p-octylphenyl salicylate, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy- 4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'
- Benzophenone UV absorbers such as dimethoxybenzophenone and 2-hydroxy-4-methoxy-5-sulfobenzophenone, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-5 '-1ell-butylphenyl)benzotriazole), 2-(2'-hydroxy-3',5'-tell-butylphenyl)benzotriazole, 2
-(2'-hydroxy-3'-1eIl-butyl-5'
-methylphenyl)-5-chlorobenzotriazole,
l (2'-hydroxy-3', 5'-di-1e(1
-aminophenyl)hencytriazole, L-(2'-
Hydroxy-3'-(3", 4", 5",
6”-tetrahydrophthalimidomethyl)-5′-methylphenyl)benzotriazole, 2-(2′-hydroxy-3′,5′-bis(α,α-dimethylpencil)
phenyl)-2H-benzotriazole, etc., 2-ethylhexyl-2-cyano-3,3'-diphenylacrylate, ethyl-2
-cyano-3,3'-diphenylacrylate and the like can be used. In particular, benzo-i-lyazole-based ultraviolet absorbers such as Tinuvin 234 (registered trademark) are preferred because they exhibit excellent ultraviolet shielding properties at low contents. In the present invention, fabrics are treated with a solution or emulsion of a resin containing the UV absorber described above. Treatment of fabrics with solutions or emulsions can be carried out by coating, dipping, spraying, etc., but coating is preferred when a high degree of ultraviolet shielding and/or water repellency is required, while breathability is Dipping is preferred if desired.

Further, in the case of coating, it is preferable to use a solution, and in the case of dipping, it is common to use an emulsion.

A solution of this resin is prepared by dissolving the above resin together with a UV absorber in a suitable solvent. As the solvent, any solvent can be used as long as it dissolves the resin and the ultraviolet absorber and does not damage the fabric or coloring, and examples thereof include trichloroethane, toluene, and the like. The concentration of resin in the solution is 10-40
%, especially 1.5 to 25%. In addition, the concentration of the ultraviolet absorber is 1 to 40%, especially 3 to 20%, and even 4%.
A content of about 15% is preferable because it provides a good ultraviolet shielding effect.

On the other hand, an emulsion of this resin is prepared by emulsifying the above resin together with an ultraviolet absorber in a suitable water-based medium. Any solvent that can be used with water may be used as long as it emulsifies the resin and ultraviolet absorber in the presence of water and does not damage the fabric or coloring, such as isopropyl alcohol, Methyl ethyl ketone and the like can be mentioned. The concentration of the resin in the emulsion is preferably 2 to 25%, particularly 5 to 20%. In addition, the concentration of the ultraviolet absorber is 5 to 40%, especially 10 to 3%.
0% is preferable since it provides a good ultraviolet shielding effect.

Coach ink is usually applied to one side of the fabric using the above resin solution, and after coating the fabric with the emulsion of the above resin, apply it with a doctor knife etc. to a thickness of 0.01 to 0.2 mm. Preferably 0.05-0
．． This is achieved by adjusting the thickness to about 1 mm and then drying it. Dry at 80-150 ℃ using a regular dryer.
C1 Preferably carried out at 120-140°C.

The dipping treatment is usually carried out by using the above-mentioned emulsion, dipping the fabric in the emulsion, and then squeezing it with a roll. Dipping is carried out for 1 second to 5 seconds, preferably for 2 seconds to 3 seconds.

For drying after dipping, use a conventional dryer.
The temperature is 100 to 180°C, preferably 130 to 160°C, particularly preferably around 150°C.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

[Example] Example 1 Using various fabrics listed in Table 1, coating was performed according to the manufacturing process shown in FIG. 1 to prepare corresponding fabrics for parasols. At this time, the following resin solution was used.

Resin solution composition Acrylic resin (solvent toluene) 95g (resin content 20% by weight) Tinuvin 234 4.5g hard
oxidizing agent
The ultraviolet transmittance of each of the obtained 0.5 g fabrics for parasols was measured using a Shimadzu self-recording spectrophotometer UV-1200. The results are shown in Table 1 along with the results for the untreated fabric.

-12~ Table 1 Made of acrylic resin (yellow') 1.2 0.
62 Same as above (unprocessed') 12.06
11.3 Made of acrylic resin (red) 0.54
0.20 Same as above (untreated) 5.57
5.18 Made of acrylic resin (purple) 1.
36 0.7 (1 same as above (unprocessed) 1
0.04 8.64 Silk robes (purple)
0.63 0.30 Same as above (untreated)
6.48 5.25 Silk robes (white)
1.36 (1,75 same as above (unprocessed)
8,43 5.115 Silk robes (green) 0.46 0.23 As is clear from Table 1, the fabric for parasols according to the present invention transmits ultraviolet rays in the wavelength range of 300 to 360 nm, which has a large effect on the human body. It exhibits excellent ultraviolet shielding properties with a ratio of 1.5% or less.

Example 2 Using various fabrics listed in Table 2, dipping was performed according to the manufacturing process shown in FIG. 2 to prepare corresponding fabrics for parasols. At this time, an emulsion of the following resin was used.

Resin emulsion composition Polyurethane resin (solvent isopropanol) (resin content 12% by weight) 45g Tinuvin 234 10g water

The ultraviolet transmittance of each of the 45 g of fabrics for parasols obtained was measured using a Shimadzu self-recording spectrophotometer UV-2200. The results are shown in Table 2 along with the results for the untreated fabric.

= 14- Table 2 Linen/cotton blend lace (white') 12.9 1
2.5 Same as above (unprocessed) 29,9
27.5 Hemp/cotton blend lace (beige) 10.06
9.76 Same as above (unprocessed) 24.
5 22.5 linen/cotton blend lace (pink) 1
1.65 11.13 Same as above (unprocessed')
17.43 16.1 Hemp 100% (raw hemp)
5.56 5.02 Same as above (unprocessed)
17.96 15.07 Cotton satin
5,89 3.83 Same as above (untreated') 21.33 23
．． 67 As is clear from Table 2, the parasol frame fabric of the present invention prepared by dipping exhibits an ultraviolet transmittance of about 50% or less of untreated fabric in the wavelength range of 300 to 360 ++ m, which has a large effect on the human body. , UV shielding properties can also be effectively improved by dipping.

[Effects of the Invention] The parasol frame fabric of the present invention has excellent ultraviolet shielding properties;
It has the advantage that it can protect the human body, especially the skin, from the harmful effects of ultraviolet rays, and that the fabric itself is less likely to fade or deteriorate due to ultraviolet rays. In particular, dipping fabrics have excellent UV shielding properties as well as breathability.

[Brief explanation of the drawing]

FIG. 1 is a schematic view showing the manufacturing process by coating of fabric for a parasol frame according to the present invention. FIG. 2 is a schematic diagram showing a manufacturing process by dipping of fabric for a parasol frame according to the present invention.

Claims (8)

[Claims] (1) A fabric for parasols, characterized in that a resin containing an ultraviolet absorber is attached to the fibers of a fabric made of natural fibers, synthetic fibers, or woven or nonwoven fabrics of blends thereof. (2) The fabric for parasols according to claim 1, wherein the resin is attached by coating the fabric with a solution of the resin. (3) The fabric for parasols according to claim 1, wherein the resin is attached by dipping the fabric in an emulsion of the resin. (4) The fabric for parasols according to any one of claims 1 to 3, wherein the resin is mainly composed of an acrylic resin or a polyurethane resin. (5) A resin characterized in that a fabric made of a woven or nonwoven fabric of natural fibers, synthetic fibers, or a blend thereof is treated with a solution or emulsion of a resin containing an ultraviolet absorber, and then dried. A method for producing a fabric for parasols, in which the fabric is attached to the fibers of the fabric. (6) The method for manufacturing a fabric for parasols according to claim 5, wherein the treatment comprises coating the fabric with a solution of the resin and adjusting the fabric to a predetermined thickness. (7) The method for producing fabric for parasols according to claim 5, wherein the treatment comprises dipping the fabric in an emulsion of the resin and squeezing it with a roll. (8) The method for manufacturing a fabric for parasols according to any one of claims 5 to 7, wherein the resin has an acrylic resin or a polyurethane resin as a main component.