CN116080161B - Flame-retardant ultraviolet-proof sunshade tarpaulin and preparation method thereof - Google Patents

Flame-retardant ultraviolet-proof sunshade tarpaulin and preparation method thereof Download PDF

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Publication number
CN116080161B
CN116080161B CN202211377614.2A CN202211377614A CN116080161B CN 116080161 B CN116080161 B CN 116080161B CN 202211377614 A CN202211377614 A CN 202211377614A CN 116080161 B CN116080161 B CN 116080161B
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ultraviolet
layer
flame
reflecting layer
retardant
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CN116080161A (en
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周敏
孙玲
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Suqian Jiaxin Fabric Co ltd
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Suqian Jiaxin Fabric Co ltd
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    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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    • D06N2211/00—Specially adapted uses
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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention relates to the field of tarpaulins, and discloses a flame-retardant ultraviolet-proof sunshade tarpaulin and a preparation method thereof. The tarpaulin is provided with a matrix layer, a flame retardant layer, a first reflecting layer, an absorbing layer, a second reflecting layer and a surface layer from inside to outside in the thickness direction; the yarns which are not soaked with the reflective coating are used for weaving alternately with the soaked yarns to form the grating structure which can penetrate ultraviolet rays, so that a small part of ultraviolet rays which penetrate through the reflective layer can escape from the grating in the reflecting process, the reflecting effect is enhanced, and the ultraviolet-proof effect is improved. According to the invention, the micron silicon dioxide powder is added in the nanometer titanium dioxide powder, the micron silicon dioxide is used as a microscopic transmission structure, ultraviolet rays irradiated on the micron silicon dioxide particles are reflected to surrounding nanometer titanium dioxide particles for absorption, the problem that the traditional titanium dioxide absorbent can only absorb on a light-facing surface is avoided, and the cost is obviously reduced.

Description

Flame-retardant ultraviolet-proof sunshade tarpaulin and preparation method thereof
Technical Field
The invention belongs to the field of tarpaulins, and particularly relates to a flame-retardant ultraviolet-proof sunshade tarpaulin and a preparation method thereof.
Background
Tarpaulin (or called waterproof cloth) is a waterproof material with high strength, good toughness and softness, is often used as canvas (canvas), polyester with polyurethane absorption layer or made into polyethylene plastic, and is widely applied to transportation and storage industries. Tarpaulins typically have a strong grommet at the corners or edges to facilitate the use of the roping to bind, hang or cover. The ultraviolet-proof fabric is a protective material for preventing the human body from being irradiated by excessive ultraviolet rays. The common fabric is polyester yarn spun, spring spun and five-piece satin, and the fabric can prevent sunburn and aging of human skin.
In the prior art, there are improvements to the flame retardant tarpaulin ultraviolet protection function:
(1) CN105172273a discloses a tent cloth with high sun-proof and ultraviolet-proof functions, and in particular discloses a moisture-absorbing breathable fabric layer which can strengthen the air permeability of tent cloth and effectively prevent the tent from shortening the service life of the tent due to excessively high internal temperature of the tent caused by excessively long exposure time of the tent in the sun; the ultraviolet-resistant layer and the reflecting layer are arranged, so that sunlight and ultraviolet rays can be effectively blocked, and the influence of radiation on people is reduced.
(2) CN106012568A discloses a tent cloth with ultraviolet resistance and a processing method thereof, and in particular discloses a tent cloth coated with zinc oxide on the surface of the tent cloth, which has the effects of ultraviolet resistance, preventing photo corrosion, self-cleaning, and cleaning dust with adverse effects on the service life of the tent cloth, such as organic matters attached on the surface of the advertisement cloth.
(3) CN210501746U discloses an ultraviolet-proof tarpaulin, and in particular discloses an ultraviolet-proof layer which can delay the aging speed of the tarpaulin and prolong the service time of the tarpaulin; the wear-resistant layer is arranged, so that the wear resistance of the tarpaulin is improved, and the damage of the inner side is avoided; the elastic layer can increase the elasticity of the tarpaulin, so that the tarpaulin can be covered by different areas or volumes; the design of the light reflection layer can reflect light and is matched with the ultraviolet-proof layer, so that the ultraviolet-proof strength is enhanced.
The technical scheme provides improvement of the ultraviolet-proof tarpaulin, however, the following problems still exist in the prior art:
(1) The existing ultraviolet-proof tarpaulin is dependent on the ultraviolet-proof performance of the material per se, including ultraviolet reflection and ultraviolet absorption, but is limited by the upper limit of the ultraviolet-proof performance of the material per se, and the ultraviolet-proof performance of the tarpaulin is difficult to be obviously improved.
(2) The existing ultraviolet-proof tarpaulin relies on organic materials as ultraviolet absorbers, has the problems of high pollution and high energy consumption in the manufacturing process, has great harm to industrial workers and ecological environment, and can reduce the ultraviolet absorption effect caused by oxidation and illumination degradation of the organic materials after long-time use.
(3) The improvement of the existing tarpaulin for improving ultraviolet resistance in the structural direction mainly stacks materials capable of absorbing ultraviolet rays with different wavelengths, so that the weight of the tarpaulin per unit area is increased, and the ultraviolet absorption capacity of each range cannot be obviously improved.
Disclosure of Invention
The flame-retardant ultraviolet-proof sunshade tarpaulin comprises a substrate layer, a flame-retardant layer, a first reflecting layer, an absorbing layer, a second reflecting layer and a surface layer from inside to outside in the thickness direction, wherein the first reflecting layer and the second reflecting layer are formed by weaving, and the absorbing layer is formed by coating an absorbing material;
the first reflecting layer is formed by weaving silk threads with ultraviolet reflection performance; setting wires without ultraviolet reflection performance at fixed intervals, and forming the second reflection layer by mixed braiding, wherein the other wires have ultraviolet reflection performance; the absorbing layer has ultraviolet absorbing properties.
Further, the silk thread is high-strength polyester silk, high-strength pe silk and nylon thread, and the silk thread with ultraviolet reflection performance is obtained through the steps of dipping an ethanol solution of titanium alkoxide and drying; the drying temperature adopted in the drying step is 80-150 ℃ and the drying time is 5-8min.
Further, the absorbing layer material comprises a base agent, an ultraviolet absorber, a stabilizer and a filler; the substrate agent is one of polyacrylate, PVC paste resin and high-density polyethylene; the ultraviolet absorber is a mixture of nano titanium dioxide powder and micron silicon dioxide powder; the mass ratio of the nano titanium dioxide powder to the micron silicon dioxide powder is 2-20:1; specifically, the mass ratio of the nano titanium dioxide powder to the micro silicon dioxide powder is 3:1
Further, the tarpaulin has at least two layers of the absorbing layer and at least two layers of the second reflecting layer, which are alternately arranged in the thickness direction, and the wires of the adjacent two layers of the second reflecting layer having no ultraviolet reflection property are not arranged in parallel.
Further, the wires of the adjacent two second reflecting layers, which do not have ultraviolet reflection performance, are warp wires and weft wires respectively.
A preparation method of flame-retardant ultraviolet-proof sunshade tarpaulin comprises the following steps:
s1, coating a flame-retardant coating on a woven substrate layer, and drying to form a flame-retardant layer, wherein the flame-retardant coating comprises the following components in parts by weight of epoxy resin: 100 parts of epoxy resin, 10-15 parts of dibutyl phthalate, 10 parts of ethanol, 5 parts of antimonous oxide, 8-13 parts of a coupling agent, 1-2 parts of an antioxidant and 10-20 parts of an amine curing agent;
s2, dipping the reflecting layer silk thread into titanium alkoxide ethanol solution and drying to obtain silk thread with ultraviolet reflection performance, wherein the silk thread is one of high-strength polyester silk, high-strength pe silk and nylon thread;
the impregnated reflective layer yarn is warp yarn: weft = 1:1 into a first reflecting layer;
the impregnated reflecting layer silk yarn and the non-impregnated reflecting layer silk yarn are mixed according to the proportion of 10-100:1, weaving into a second reflecting layer in a single warp yarn direction;
s3, paving a first reflecting layer on the flame-retardant layer, coating adhesive and drying;
s4, coating an absorbing material on the first reflecting layer and drying, wherein at least one layer of absorbing material is coated;
the absorbing material comprises a base agent, an ultraviolet absorber, a stabilizer and a filler;
the substrate agent is one of polyacrylate, PVC paste resin and high-density polyethylene; the ultraviolet absorber is a mixture of nano titanium dioxide powder and micron silicon dioxide powder;
s5, repeating the steps S3 and S4 for a plurality of times as required;
s6, coating a surface layer and drying.
Further, the surface layer is a perfluoroalkyl acrylate fluorine waterproof agent.
Advantageous effects
Compared with the prior art, the invention provides the flame-retardant ultraviolet-proof sunshade tarpaulin and the preparation method thereof, and the flame-retardant ultraviolet-proof sunshade tarpaulin has the following beneficial effects:
1. the invention forms good room ultraviolet effect by using the mode that the ultraviolet emitting layers and the ultraviolet absorbing layers are alternately stacked, when the ultraviolet irradiates on the reflecting layers, most of the ultraviolet is reflected, and a small part of the ultraviolet passing through the reflecting layers is also dissipated by the absorbing layers.
2. The invention uses the silk thread which is not infiltrated with the reflective coating and is alternately woven with the infiltrated silk thread to form the grating structure which can penetrate ultraviolet rays, and the bottom of the tarpaulin is provided with the reflective layer without the grating, so that a small part of ultraviolet rays which penetrate the reflective layer can escape from the grating in the reflecting process, the reflecting effect is enhanced, and the ultraviolet-proof effect is improved.
3. The staggered grating can prevent external ultraviolet rays from being absorbed by the grating, and prevent the grating from weakening the ultraviolet-proof effect.
4. The invention adopts inorganic materials, in particular nano titanium dioxide as an ultraviolet absorber, so that the pollution and degradation problems of the organic absorber are avoided; meanwhile, the invention adds micron silicon dioxide powder in the nanometer titanium dioxide powder, utilizes micron silicon dioxide as a microcosmic transmission structure, reflects ultraviolet rays irradiated on micron silicon dioxide particles to surrounding nanometer titanium dioxide particles for absorption, avoids the problem that the traditional titanium dioxide absorbent can only absorb on a light-facing surface, and simultaneously, compared with the traditional pure nanometer silicon dioxide titanium or pure nanometer silicon dioxide as an ultraviolet-proof material, the invention can obviously reduce the cost; further, the invention determines the optimal mass ratio of the nano titanium dioxide to the micro silicon dioxide powder through the experiment.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention having two second reflective layers and two absorptive layers;
FIG. 2 is a schematic diagram of the distribution of nano-titania and micro (industrial) silica of the present invention in an absorber layer;
FIG. 3 is a schematic diagram of the grating profile of two second reflective layers according to the present invention;
FIG. 4 is a schematic view showing the reflection of ultraviolet rays between a first reflective layer, an absorbing layer and a second reflective layer according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the flame-retardant ultraviolet-proof sunshade tarpaulin comprises a substrate layer 1, a flame-retardant layer 2, a first reflecting layer 3, an absorbing layer 4, a second reflecting layer 5 and a surface layer 6 from inside to outside in the thickness direction, wherein the first reflecting layer 3 and the second reflecting layer 5 are formed by braiding, the absorbing layer 4 is formed by coating an absorbing material, and the first reflecting layer 3 is formed by braiding wires with ultraviolet reflection performance; arranging wires without ultraviolet reflection performance at fixed intervals, wherein the other wires have ultraviolet reflection performance, and forming the second reflection layer 5 by mixed weaving; the absorbing layer has ultraviolet absorbing properties. The silk thread is high-strength polyester silk, and the silk thread with ultraviolet reflection performance is obtained through the steps of dipping titanium alkoxide in ethanol solution and drying; the drying temperature adopted in the drying step is 120 ℃, and the drying time is 8min; the absorbing layer material comprises a base agent, an ultraviolet absorber, a stabilizer and a filler; the substrate agent is in PVC paste resin; the ultraviolet absorber is a mixture of nano titanium dioxide powder and micron silicon dioxide powder; the mass ratio of the titanium dioxide powder to the silicon dioxide powder is 3:1, a step of; the tarpaulin is provided with one layer of absorption layer 4 and one layer of second reflection layer 5, which are alternately arranged in the thickness direction, and the wires of the adjacent two layers of second reflection layers 5 without ultraviolet reflection performance are not arranged in parallel, specifically are arranged vertically, namely, the wires of the adjacent two layers of second reflection layers (5) without ultraviolet reflection performance are respectively warp wires and weft wires.
Considering that the price of industrial silicon dioxide is only about one tenth of that of nano titanium dioxide, the content proportion of nano titanium dioxide should be reduced as much as possible under the premise of guaranteeing the ultraviolet-proof effect, and the following comparative test, T (UVA) AV (%) index, is given for the matching proportion (mass) of nano titanium dioxide and micro silicon dioxide:
TiO2：SiO2 20:1 15:1 8:1 3:1 2:1 1:1 1:2 1:5
T(UVA)AV 0.2 0.5 0.8 0.6 1.9 5.5 3.7 10.9
it can be seen that when a large amount of nano titanium dioxide is used, ultraviolet (UVA) can be well resisted, but in the region of the mass ratio of more than 3:1, the resistance to UVA has reached a higher value, and increasing the proportion of nano titanium dioxide can not improve the protection ability, conversely, the cost can be increased, and in the region of the mass ratio of less than 3:1de, the T (UVA) AV is obviously increased due to the insufficient content of nano titanium dioxide and the insufficient resistance of micron-sized silicon dioxide to ultraviolet.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The utility model provides a fire-retardant anti ultraviolet sunshade tarpaulin which characterized in that:
the tarpaulin is characterized in that a matrix layer (1), a flame retardant layer (2), a first reflecting layer (3), an absorbing layer (4), a second reflecting layer (5) and a surface layer (6) are arranged outside the tarpaulin in the thickness direction from inside to outside, the first reflecting layer (3) and the second reflecting layer (5) are formed by weaving, and the absorbing layer (4) is formed by coating an absorbing material; the absorption layer (4) has ultraviolet absorption performance; the ultraviolet rays are continuously reflected between two adjacent reflecting layers and are continuously dissipated in the absorbing layer;
the first reflecting layer (3) is formed by weaving silk threads with ultraviolet reflection performance;
setting wires without ultraviolet reflection performance at fixed intervals, wherein the other wires have ultraviolet reflection performance, and the wires without ultraviolet reflection performance and the wires with ultraviolet reflection performance are mixed and woven to form the second reflection layer (5); the second reflecting layer (5) is provided with a grating structure capable of transmitting ultraviolet rays, the bottom of the tarpaulin is provided with a first reflecting layer (3) without the grating structure, so that a small part of ultraviolet rays which penetrate through the second reflecting layer (5) escape from the grating structure in the reflecting process;
the tarpaulin is provided with at least two layers of absorption layers (4) and at least two layers of second reflection layers (5), the absorption layers and the at least two layers of second reflection layers (5) are alternately arranged in the thickness direction, silk threads without ultraviolet reflection performance of the two adjacent layers of second reflection layers (5) are warp threads and weft threads respectively, the silk threads without ultraviolet reflection performance of the two adjacent layers of second reflection layers (5) are arranged in a non-parallel manner, a staggered grating structure is formed, and external ultraviolet rays are prevented from being emitted from the grating structure;
the absorbing layer material comprises a base agent, an ultraviolet absorber, a stabilizer and a filler; the substrate agent is one of polyacrylate, PVC paste resin and high-density polyethylene; the ultraviolet absorber is a mixture of nano titanium dioxide powder and nano silicon dioxide powder; the mass ratio of the nano titanium dioxide powder to the micro silicon dioxide powder is 3:1.
2. The flame retardant ultraviolet resistant sunshade cloth as claimed in claim 1, wherein:
the silk thread with the ultraviolet reflection performance is high-strength polyester silk, high-strength pe silk and nylon thread, and the silk thread with the ultraviolet reflection performance is obtained through the steps of dipping an ethanol solution of titanium alkoxide and drying; the drying temperature adopted in the drying step is 80-150 ℃ and the drying time is 5-8min.
3. A method for preparing a flame-retardant ultraviolet-proof sunshade tarpaulin for producing the flame-retardant ultraviolet-proof sunshade tarpaulin according to any of the claims 1 to 2, characterized in that,
the method comprises the following steps:
s1, coating a flame-retardant coating on a woven substrate layer (1), and drying to form a flame-retardant layer (2), wherein the flame-retardant coating comprises the following components in parts by weight of epoxy resin: 100 parts of epoxy resin, 10-15 parts of dibutyl phthalate, 10 parts of ethanol, 5 parts of antimonous oxide, 8-13 parts of a coupling agent, 1-2 parts of an antioxidant and 10-20 parts of an amine curing agent;
s2, dipping the reflecting layer silk thread into titanium alkoxide ethanol solution and drying to obtain a silk thread with ultraviolet reflection performance, wherein the silk thread with ultraviolet reflection performance is one of high-strength polyester yarns, high-strength pe yarns and nylon yarns;
the impregnated reflective layer yarn is warp yarn: weft = 1:1 into a first reflecting layer (3);
the impregnated reflecting layer silk yarn and the non-impregnated reflecting layer silk yarn are mixed according to the proportion of 10-100:1, and in a single warp yarn direction, weaving into a second reflecting layer (5) in a mixed mode;
s3, paving a first reflecting layer (3) on the flame-retardant layer (2), coating adhesive and drying;
s4, coating an absorbing material on the first reflecting layer (3) and drying, wherein at least one layer of absorbing material is coated;
the absorbing material comprises a base agent, an ultraviolet absorber, a stabilizer and a filler;
the substrate agent is one of polyacrylate, PVC paste resin and high-density polyethylene; the ultraviolet absorber is a mixture of micron-sized or nano titanium dioxide powder and micron silicon dioxide powder;
s5, repeating the steps S3 and S4 for a plurality of times as required;
s6, coating the surface layer (6) and drying.
4. The method for preparing the flame-retardant ultraviolet-proof sunshade tarpaulin according to claim 3, wherein the method comprises the following steps: the surface layer (6) is a perfluoroalkyl acrylate fluorine waterproof agent.
CN202211377614.2A 2022-11-04 2022-11-04 Flame-retardant ultraviolet-proof sunshade tarpaulin and preparation method thereof Active CN116080161B (en)

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CN103941542A (en) * 2014-04-08 2014-07-23 昆明理工大学 Preparation method of ultraviolet-proof cloth
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