Ultra-high hydrostatic pressure waterproof acrylic sunshade fabric and preparation method thereof

Abstract

The invention discloses an ultra-high hydrostatic pressure waterproof acrylic sunshade fabric and a preparation method thereof. The sunshade fabric comprises an acrylic base fabric and an attachment layer attached to the acrylic base fabric; the warp density of the acrylic base fabric is 74-78 strands / inch, and the weft density is 35-38 strands / inch; the raw materials of the attachment layer include 80-90 parts of water, 5-9 parts of amine-modified melamine formaldehyde resin, 1-3 parts of catalyst, 2-4 parts of waterproofing agent, and 2-4 parts of wetting agent according to mass parts. By respectively improving the acrylic base fabric and the corresponding coating, not only the ultra-high hydrostatic pressure waterproof sunshade fabric is obtained, but also the preparation process is simple, fewer reagent types and process flows are used, and the market application prospect is very good.

Description

Technical Field

[0001] The invention relates to the technical field of functional fabrics, and in particular to an ultra-high hydrostatic pressure waterproof acrylic sunshade fabric and a preparation method thereof. Background Art

[0002] With the development of economy, the domestic demand for energy is increasing. The proportion of building energy consumption in China's total energy consumption is gradually increasing. Among all buildings, more than 96% are high-energy consumption buildings. Therefore, building energy conservation is imminent. At present, the production technology of indoor building sunshade fabrics has become mature. However, the development of outdoor building sunshade materials is in its initial stage. The outdoor building sunshade materials on the market are uneven, with poor sunshade effect and low efficiency, which makes it difficult to reduce energy consumption.

[0003] Acrylic is a polyacrylonitrile fiber. Unlike other fabric materials, acrylic has the advantages of high UV resistance and high color fastness. However, there are few reports on its use as sunshade fabrics, which limits the development of sunshade fabrics, especially outdoor sunshade fabrics.

[0004] Hydrostatic pressure is an important indicator of the waterproof and anti-seepage performance of fabrics, and it is also a very important indicator of outdoor sunshade fabrics. In outdoor environments, it is necessary to ensure the light resistance and anti-fouling properties of the sunshade material, and also to make the sunshade material have a higher hydrostatic pressure, so as to ensure long-term use in the changing outdoor environment and extend the service life.

[0005] Therefore, research on acrylic-based ultra-high hydrostatic pressure waterproof sunshade fabrics has great market value. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide an ultra-high hydrostatic pressure waterproof acrylic sunshade fabric and a preparation method thereof. By improving the acrylic base fabric and the corresponding coating respectively, not only the ultra-high hydrostatic pressure waterproof sunshade fabric is obtained, but also the preparation process is simplified, using fewer types of reagents and process flows, and has very good market application prospects.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A super-high hydrostatic pressure waterproof acrylic sunshade fabric, the sunshade fabric comprises an acrylic base fabric and an attachment layer attached to the acrylic base fabric; the warp density of the acrylic base fabric is 74-78 strands / inch, and the weft density is 35-38 strands / inch; the raw materials of the attachment layer include 80-90 parts of water, 5-9 parts of alcoholamine-modified melamine formaldehyde resin, 1-3 parts of catalyst, 2-4 parts of waterproofing agent, and 2-4 parts of wetting agent according to weight parts.

[0009] Furthermore, the alcoholamine in the alcoholamine-modified melamine-formaldehyde resin is one of ethanolamine, diethanolamine and triethanolamine, or a combination thereof.

[0010] Furthermore, the mass ratio of the alcoholamine to the melamine formaldehyde resin in the alcoholamine-modified melamine formaldehyde resin is 0.05-0.1:1.

[0011] Furthermore, the alcoholamine-modified melamine-formaldehyde resin is a mixture of melamine-formaldehyde resin and alcoholamine.

[0012] Furthermore, the catalyst is one or a combination of inorganic acid, organic acid, metal salt, and ammonium salt. Specifically, the inorganic acid can be hydrochloric acid; the organic acid can be oxalic acid; the metal salt can be magnesium chloride or zinc nitrate; the ammonium salt can be ammonium chloride or ammonium sulfate.

[0013] Furthermore, the waterproofing agent is a fluorocarbon waterproofing agent.

[0014] The fluorocarbon waterproofing agent includes one or a combination of C6 waterproofing agent and C8 waterproofing agent.

[0015] Furthermore, the wetting agent is any one or more of an isothiazolinone wetting agent, an isothiazolone wetting agent and a fatty ether wetting agent.

[0016] The isothiazolinone wetting agent may include 5-chloro-2-methyl-4-isothiazoline-3-one and / or methylisothiazolinone. The isothiazolone wetting agent may include 5-chloro-2-methyl-3(2H)isothiazolone and / or 2-methyl-3(2H)isothiazolone. The fatty ether wetting agent may include ethoxylated C~C-fatty alcohol and / or 3-butoxy-2-propanol.

[0017] The present invention also provides a method for preparing the ultra-high hydrostatic pressure waterproof acrylic sunshade fabric, comprising the following steps:

[0018] S1, mixing the raw materials of the adhesion layer and using the mixture as slurry to perform padding treatment on the acrylic base fabric;

[0019] S2, baking treatment after padding treatment;

[0020] S3, baking and cooling to obtain the sunshade fabric.

[0021] Furthermore, in step S1, the rolling rate of the padding treatment is 50-80%.

[0022] Furthermore, in step S2, the baking temperature is 150-170° C., and the baking time is 1-3 min.

[0023] Beneficial effects:

[0024] 1. The present invention uses alcohol amine to modify melamine formaldehyde resin. By utilizing the special alkalinity of alcohol amine, only simple physical mixing is required to enable melamine formaldehyde resin to be cured under the formula of the present invention, without the need to add additional components such as three-proof cross-linking catalyst, pH adjuster and formaldehyde scavenger. Furthermore, by controlling the amount of alcohol amine, the hydrostatic pressure of the sunshade fabric of the present invention can be increased under the overall formula.

[0025] 2. The present invention can further control the warp density and weft density of the acrylic base fabric, which can not only further improve the hydrostatic pressure of the sunshade fabric of the present invention, but also maintain the hairiness of the fabric and improve the problem of white scratches on the fabric; in addition, it also avoids the additional use of a process of heating and calendering the base fabric to increase the hydrostatic pressure, saves resources, controls costs, and is more conducive to industrial production.

[0026] 3. Through further control of process conditions, the present invention makes the acrylic-based sunshade fabric finally obtained have excellent ultra-high hydrostatic pressure waterproof performance, as well as excellent mechanical, light fastness, light resistance, anti-aging, anti-fouling and oil resistance and other properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a diagram of the sunshade fabric of Example 1;

[0028] Figure 2 This is a diagram of the sunshade fabric of Example 2;

[0029] Figure 3 This is a sunshade fabric diagram of Example 3;

[0030] Figure 4 Schematic diagram of hydrostatic pressure test. DETAILED DESCRIPTION

[0031] The present invention is described in detail below through specific implementation methods, but the scope of the present invention is not limited to the listed embodiments. In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] The materials used in the present invention are all commercially available, and the catalyst is ammonium chloride among ammonium salts.

[0033] Embodiment 1:

[0034] The warp density of acrylic base fabric is 75 threads / inch, the weft density is 35.5 threads / inch, and the color is dark green 512;

[0035] The raw materials of the adhesion layer include 85 parts of water, 7 parts of alcoholamine modified melamine formaldehyde resin, 2 parts of ammonium chloride, 3 parts of C6 waterproofing agent, and 3 parts of 5-chloro-2-methyl-4-isothiazoline-3-one according to mass parts; among them, the alcoholamine modified melamine formaldehyde resin is 0.6 parts of diethanolamine and 6.4 parts of melamine formaldehyde resin.

[0036] Diethanolamine and melamine formaldehyde resin are mixed to obtain alcoholamine modified melamine formaldehyde resin; water, alcoholamine modified melamine formaldehyde resin, ammonium chloride, C6 waterproofing agent and 5-chloro-2-methyl-4-isothiazoline-3-one are mixed to obtain slurry; the rolling rate is controlled to be 63%, and a padding treatment is performed; after the padding treatment, the mixture is baked at 160° C. for 2 minutes to obtain the sunshade fabric of Example 1.

[0037] Embodiment 2:

[0038] The only difference from Example 1 is:

[0039] The color of the acrylic base fabric is wine red 511.

[0040] The sunshade fabric of Example 2 is obtained.

[0041] Embodiment 3:

[0042] The only difference from Example 1 is:

[0043] The warp density of the acrylic base fabric is 74 threads / inch, the weft density is 36 threads / inch, and the color is medium gray 513.

[0044] The sunshade fabric of Example 3 is obtained.

[0045] Embodiment 4:

[0046] The only difference from Example 1 is:

[0047] The warp density of the acrylic base fabric is 78 threads / inch, the weft density is 38 threads / inch, and the color is dark gray FAB430.

[0048] The sunshade fabric of Example 4 is obtained.

[0049] Embodiment 5:

[0050] The only difference from Example 1 is:

[0051] The alcoholamine-modified melamine formaldehyde resin is 0.3 parts of diethanolamine and 6.7 parts of melamine formaldehyde resin.

[0052] The sunshade fabric of Example 5 is obtained.

[0053] Comparative Example 1:

[0054] The only difference from Example 1 is:

[0055] The warp density of the acrylic base fabric is 73 threads / inch and the weft density is 34 threads / inch.

[0056] The sunshade fabric of Comparative Example 1 was obtained.

[0057] Comparative Example 2:

[0058] The only difference from Example 1 is:

[0059] The warp density of the acrylic base fabric is 72 threads / inch and the weft density is 33 threads / inch.

[0060] The sunshade fabric of Comparative Example 2 was obtained.

[0061] Comparative Example 3:

[0062] The only difference from Example 1 is:

[0063] The warp density of the acrylic base fabric is 79 threads / inch and the weft density is 39 threads / inch.

[0064] The sunshade fabric of Comparative Example 3 was obtained.

[0065] Comparative Example 4:

[0066] The only difference from Example 1 is:

[0067] The warp density of the acrylic base fabric is 80 threads / inch and the weft density is 40 threads / inch.

[0068] The sunshade fabric of Comparative Example 4 was obtained.

[0069] Comparative Example 5:

[0070] The only difference from Example 1 is:

[0071] The alcoholamine-modified melamine formaldehyde resin is 0.2 parts of diethanolamine and 6.8 parts of melamine formaldehyde resin.

[0072] The sunshade fabric of Comparative Example 5 was obtained.

[0073] Comparative Example 6:

[0074] The only difference from Example 1 is:

[0075] The alcoholamine-modified melamine formaldehyde resin is 0.1 parts of diethanolamine and 6.9 parts of melamine formaldehyde resin.

[0076] The sunshade fabric of Comparative Example 6 was obtained.

[0077] Comparative Example 7:

[0078] The only difference from Example 1 is:

[0079] The alcoholamine-modified melamine formaldehyde resin is 0.7 parts of diethanolamine and 6.3 parts of melamine formaldehyde resin.

[0080] The sunshade fabric of Comparative Example 7 was obtained.

[0081] Comparative Example 8:

[0082] The only difference from Example 1 is:

[0083] The alcoholamine-modified melamine formaldehyde resin is 0.8 parts of diethanolamine and 6.2 parts of melamine formaldehyde resin.

[0084] The sunshade fabric of Comparative Example 8 was obtained.

[0085] Performance Test:

[0086] 1. Hydrostatic pressure test: ISO 811:2018, water pressure growth rate is 60cmH2O / min, distilled water temperature is 20℃, and the front of the sample faces the water.

[0087] 2. Mechanical test: ASTM D5035-11 (2019).

[0088] 3. Water splashing test: AATCC TM 22-2017, water temperature is 27±1℃.

[0089] 4. Color fastness to light test: ISO 105-B02:2014, xenon arc lamp.

[0090] 5. Light resistance and anti-aging test: ASTM G154-16, lamp type UVA-340, exposure time 1200h.

[0091] 6. Antifouling and oil resistance test: ISO 14419:2010, air temperature 21±1℃, relative humidity 65±2%RH, sample size 20cm×20cm, sample face up.

[0092] The test results are shown in Table 1 and Table 2.

[0093] Table 1 Performance test results of Examples 1-5 and Comparative Examples 1-8

[0094]

[0095] As shown in Table 1, Examples 1-5 obtained ultra-high hydrostatic pressure acrylic-based sunshade fabrics of 33-41cmH2O, and the hydrostatic pressure was greatly improved compared to the acrylic base fabric, with a rate of improvement of 14-34%. Further, by comparing Example 1 with Comparative Examples 1-4, it can be seen that the warp density and weft density of the acrylic base fabric will affect the interaction between the base fabric and the slurry, and different warp densities and weft densities have different effects. The hydrostatic pressure improvement rate of Example 1 is 3-6 times that of Comparative Examples 1-4. According to Example 1 and Comparative Examples 5-8, it can be seen that the addition amount of alcoholamine also affects the interaction between the base fabric and the slurry. When the addition amount is too little, the hydrostatic pressure improvement rate is only 2-3%, and when the addition amount is too much, the hydrostatic pressure improvement rate is basically no longer changed. In addition, through the process and slurry composition of the present invention, the obtained acrylic-based sunshade fabric has excellent performances such as water resistance, light fastness, light resistance and anti-aging, oil resistance, moderate hairiness and not easy to produce scratches.

[0096] The mechanical property test results of Examples 1-5 are shown in Table 2.

[0097] Table 2 Mechanical properties test results of Examples 1-5

[0098]

[0099] It can be seen from Table 2 that the process and slurry composition of the present invention not only make the acrylic-based sunshade fabric have excellent hydrostatic pressure waterproof performance, but also have excellent mechanical properties.

[0100] The present invention has achieved the following beneficial effects through the above embodiments:

[0101] 1. The present invention uses alcohol amine to modify melamine formaldehyde resin. By utilizing the special alkalinity of alcohol amine, only simple physical mixing is required to enable melamine formaldehyde resin to be cured under the formula of the present invention, without the need to add additional components such as three-proof cross-linking catalyst, pH adjuster and formaldehyde scavenger. Furthermore, by controlling the amount of alcohol amine, the hydrostatic pressure of the sunshade fabric of the present invention can be increased under the overall formula.

[0102] 2. The present invention can further control the warp density and weft density of the acrylic base fabric, which can not only further improve the hydrostatic pressure of the sunshade fabric of the present invention, but also maintain the hairiness of the fabric and improve the problem of white scratches on the fabric; in addition, it also avoids the additional use of a process of heating and calendering the base fabric to increase the hydrostatic pressure, saves resources, controls costs, and is more conducive to industrial production.

[0103] 3. Through further control of process conditions, the present invention makes the acrylic-based sunshade fabric finally obtained have excellent ultra-high hydrostatic pressure waterproof performance, as well as excellent mechanical, light fastness, light resistance, anti-aging, anti-fouling and oil resistance and other properties.

[0104] The embodiments of the present invention are described in detail above. The description of the above embodiments is only used to help understand the method of the present invention and its core concept, and does not limit the scope of implementation of the present invention. Therefore, all equivalent changes or modifications made according to the structure, characteristics and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. An ultra-high hydrostatic pressure waterproof acrylic sunshade fabric, characterized in that: The sunshade fabric is composed of an acrylic base fabric and an attachment layer attached to the acrylic base fabric; the warp density of the acrylic base fabric is 74-78 strands / inch, and the weft density is 35-38 strands / inch; the raw materials of the attachment layer are composed of the following raw materials according to mass parts: 80-90 parts of water, 5-9 parts of amine-modified melamine formaldehyde resin, 1-3 parts of catalyst, 2-4 parts of waterproofing agent, 2-4 parts of 5-chloro-2-methyl-4-isothiazoline-3-one and / or methylisothiazolinone and / or 5-chloro-2-methyl-3(2H)isothiazolone and / or 2-methyl-3(2H)isothiazolone and / or ethoxylated C~C-fatty alcohol and / or 3-butoxy-2-propanol; The alcoholamine in the alcoholamine-modified melamine formaldehyde resin is one of ethanolamine, diethanolamine and triethanolamine or a combination thereof; The alcoholamine modified melamine formaldehyde resin has an alcoholamine to melamine formaldehyde resin ratio of 0.05-0.1:1 by mass; The alcoholamine-modified melamine formaldehyde resin is a mixture of melamine formaldehyde resin and alcoholamine; The catalyst is one or a combination of inorganic acid, organic acid, metal salt, and ammonium salt; The waterproofing agent is a fluorocarbon waterproofing agent.

2. The method for preparing the ultra-high hydrostatic pressure waterproof acrylic sunshade fabric according to claim 1, characterized in that: The steps include: S1, mixing the raw materials of the adhesion layer and using the mixture as slurry to perform padding treatment on the acrylic base fabric; S2, baking treatment after padding treatment; S3, baking and cooling to obtain the sunshade fabric.

3. The preparation method according to claim 2, characterized in that: In step S1, the rolling rate of the padding treatment is 50-80%.

4. The preparation method according to claim 2, characterized in that: In step S2, the baking temperature is 150-170° C., and the baking time is 1-3 min.

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