Elastic sun-proof knitted fabric

Abstract

The utility model provides an elastic sunscreen knitted fabric which comprises polyacrylonitrile fiber threads and aerogel fiber threads, the polyacrylonitrile fiber threads intersect in the warp direction and the weft direction to form a tatting layer, the aerogel fiber threads are interwoven and inserted in the tatting layer in the inclined direction, and the aerogel fiber threads are woven in the tatting layer in the inclined direction. The aerogel fiber lines are wound and knotted with the polyacrylonitrile fiber lines at cross nodes of the polyacrylonitrile fiber lines, and then the penetrating direction is changed. According to the elastic sun-proof knitted fabric, excellent elastic performance and sun-proof performance of the elastic sun-proof knitted fabric are guaranteed, meanwhile, compression on the body can be reduced, and the wearing comfort is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of knitted fabrics, in particular to an elastic sun-proof knitted fabric. Background Art

[0002] In some sports, athletes wear tight sun-protective clothing, which has high requirements on the elasticity and sun-protective properties of the fabric.

[0003] There are two main types of sunscreen clothing sold on the market. One is to achieve the sunscreen effect by applying a sunscreen layer on the fabric. This method of sunscreen clothing generally uses adhesives, which will form a film on the surface of the fabric. It is generally not breathable and feels hard, and it is stuffy when worn. The other is a thin translucent sunscreen clothing, which is woven with multi-porous fibers that have been treated with UV protection. It not only has a sunscreen effect, but also the multi-porous structure increases the moisture absorption and perspiration of the fabric, making it more suitable for wearing in hot environments. This thin sunscreen fabric is mainly a chemical fiber product, such as polyester, nylon, acrylic, etc. Among these materials, acrylic has the best light resistance, so it is a relatively excellent sunscreen clothing material. The processing and production method of anti-ultraviolet fiber is mainly to add ultraviolet absorbers to the spinning solution, such as mixing titanium dioxide (TiO2) particles with the monomers used to make fibers to make silk threads with uniform inorganic distribution, and then use this silk thread to weave cloth to make sunscreen clothing.

[0004] The introduction of knitted fabrics with high elastic fibers has achieved better elasticity and recovery. Tights, body suits, sportswear, etc. made of this material can give consumers more visual and physiological satisfaction. However, this will cause compression, which in turn affects the comfort of wearing. The obstructive compression caused by the elastic deformation of clothing fabrics and human movement is called clothing pressure or contact pressure. The size of clothing pressure directly affects human movement and physiological sensation. When the clothing pressure is too large, a lot of ineffective work must be done to overcome the movement resistance, causing fatigue, leading to changes and burdens in breathing, pulse and blood circulation. Too little clothing pressure will make the clothing look loose and not light and fit. Therefore, the appropriate critical clothing pressure is a basic issue and indicator for the design of this type of clothing.

[0005] The structure of knitted fabrics is composed of coil units. Under the action of external force, the coils are deformed, that is, the coils are bent, the coils are displaced and rotated, collectively referred to as "transfer", and the load increases slowly. When this transfer is completed, as the tensile force continues to increase, the relaxed yarns stretch and straighten, and the load increases rapidly; when the yarn continues to stretch, the fibers in the yarns slip relatively, and the load increases linearly with a high slope until it breaks. Therefore, the elasticity of knitted fabrics is composed of the early coil transfer and the later yarn elongation. For most knitted fabrics, their elastic composition can be explained by this model, but this explanation has limitations, because the elastic composition of knitted fabrics with elastic fibers or special tissues is more complicated than this.

[0006] Stretch knitted fabrics are usually divided into unidirectional stretch fabrics (mostly weft stretch) and bidirectional stretch fabrics (warp and weft stretch). As weft knitted stretch fabrics, you can use very elastic tissues (such as rib and double reverse tissue structure), you can also add highly elastic fibers, or use a combination of the two. The fiber is usually added in the form of feeding the fiber directly with the yarn to form a loop, using the elasticity of the fiber itself and the inherent elasticity of the tissue to form the elasticity of the fabric. Spandex is the most commonly used elastic fiber, which can be fed in every way (called dense root) or fed in every other way (called sparse root). As a warp knitted elastic fabric, spandex is often in the form of loops or weft inserts. The elasticity of the warp knitted tissue itself is not as good as that of the weft knitted tissue, so its elasticity is mainly contributed by spandex. If spandex is in the form of loops or weft inserts other than chain knitting, the fabric usually has bidirectional elasticity; if spandex appears in the form of chain knitting, the fabric usually has only unidirectional elasticity.

[0007] Compared with ordinary knitted fabrics, stretch knitted fabrics have the mechanical characteristics of easy stretching, easy recovery and good elasticity. As a stretch knitted fabric, after adding elastic fibers, the fabric itself will shrink under the prestress of the elastic fibers, and this shrinkage will make the initial state of the fabric tighter. When external force is applied to the fabric, the elastic fibers stretch and stretch the part of the fabric that has already shrunk. Therefore, in this stretching stage, the elasticity is contributed by the elastic fibers. As the stretching proceeds, due to the relationship between the tissue structure, the horizontal or vertical rows of some tissues (such as ribbed tissues, double reverse tissues, etc.) will produce covering in the equilibrium state, which will stretch during stretching, thereby forming the elasticity of the second stretching stage of the fabric with the fatigue of the elastic fibers. The subsequent stretching is the elasticity formed mainly by the transfer of the coils and the elongation of the yarn.

[0008] Therefore, the present application needs to provide an elastic sun-proof knitted fabric that reduces pressure on the body and improves wearing comfort while ensuring its excellent elasticity and sun-proof properties. Utility Model Content

[0009] The utility model aims to solve the above technical problems and provides an elastic sun-proof knitted fabric.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] An elastic sun-proof knitted fabric comprises: polyacrylonitrile fiber lines and aerogel fiber lines. The polyacrylonitrile fiber lines are crossed in the warp direction and the weft direction to form a woven layer. The aerogel fiber lines are interwoven obliquely in the woven layer. The aerogel fiber lines are entangled with the polyacrylonitrile fiber lines at the intersection nodes of the polyacrylonitrile fiber lines, and then the interlacing direction is changed.

[0012] As a preferred technical solution, the aerogel fiber line is a polyimide gel fiber line.

[0013] As a preferred technical solution, titanium dioxide particles are evenly distributed on the polyacrylonitrile fiber line.

[0014] After adopting the above technical solution, the utility model has the following advantages:

[0015] Polyacrylonitrile fiber is acrylic fiber, which has the best light resistance and is therefore a relatively excellent sunscreen clothing material. The utility model forms a woven layer composed of polyacrylonitrile fiber yarns by warp and weft stretching, so that the knitted fabric has bidirectional elasticity and good air permeability and sunscreen performance.

[0016] However, acrylic fiber has poor air permeability, which can easily lead to dampness and discomfort; acrylic fiber has poor hydrophilicity and does not have good hygroscopicity, which can easily lead to sweat accumulation on the skin surface, making it unsuitable for making underwear. Therefore, the knitted fabric of the utility model adds a lining layer composed of aerogel fiber threads to the inner side of the woven layer composed of polyacrylonitrile fiber threads of the knitted fabric through a spun-knot weaving method. This lining layer has the following functions: 1. It increases the oblique tensile resistance of the knitted fabric; 2. Aerogel fibers have extremely high thermal insulation, moisture absorption, and air permeability, can absorb sweat and discharge it, and can be used as an underwear layer.

[0017] In addition, since the knitted fabric of the utility model has both a cross relationship formed by polyacrylonitrile fiber lines and a tangle relationship formed by polyacrylonitrile fiber lines and aerogel fiber lines, the elasticity of the knitted fabric is enhanced, and the elasticity is greater than that of woven fabrics, but it is not knotted, and the stretchability is smaller than that of general knitted fabrics, but it is not soft. That is, the knitted fabric of the utility model can reduce pressure on the body and improve wearing comfort while ensuring its excellent elasticity and sun protection properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The diagram is a structural diagram of an elastic sun-protective knitted fabric. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1 As shown, an elastic sun-protective knitted fabric includes: a polyacrylonitrile fiber line 1 and an aerogel fiber line 2.

[0021] The polyacrylonitrile fiber line 1 crosses along the warp direction and the weft direction to form a woven layer. The aerogel fiber line 2 is interwoven and inserted into the woven layer along an oblique direction. The aerogel fiber line 2 is entangled with the polyacrylonitrile fiber line 1 at the intersection node of the polyacrylonitrile fiber line 1, and then the insertion direction is changed.

[0022] To clearly show the cross-entangled structure of knitted fabrics, Figure 1 It is divided into four parts. The upper left corner part is the entangled structure of the polyacrylonitrile fiber line 1 and the aerogel fiber line 2 along the weft direction; the upper right corner part is the woven layer structure; the lower left corner is the structure of the elastic sunscreen knitted fabric of the utility model; the lower right corner part is the entangled structure of the polyacrylonitrile fiber line 1 and the aerogel fiber line 2 along the warp direction. The two black-filled aerogel fiber lines 2 specifically show the interlaced structure of the aerogel fiber lines 2 along the warp direction and along the weft direction.

[0023] The polyacrylonitrile fiber line 1 is prepared by adding an ultraviolet absorber to the spinning solution, specifically, by mixing titanium dioxide (TiO2) particles with the polyacrylonitrile monomer for making the fiber to produce the polyacrylonitrile fiber line 1 with uniform distribution of inorganic substances.

[0024] The aerogel fiber line 2 is firstly driven into the capillary by surface tension of the aerogel precursor PAA sol, and then easily forms polyimide gel fiber in a narrow space through a static sol-gel process, and finally obtains the mesoporous aerogel fiber through a supercritical CO2 drying process.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An elastic sun-proof knitted fabric, characterized in that: include: Polyacrylonitrile fiber lines and aerogel fiber lines, wherein the polyacrylonitrile fiber lines are crossed along the warp direction and the weft direction to form a woven layer, and the aerogel fiber lines are interwoven obliquely in the woven layer, and the aerogel fiber lines are entangled with the polyacrylonitrile fiber lines at the intersection nodes of the polyacrylonitrile fiber lines, and then the interlacing direction is changed.

2. The elastic sun-proof knitted fabric according to claim 1, characterized in that: The aerogel fiber line is a polyimide gel fiber line.

3. The elastic sun-proof knitted fabric according to claim 1, characterized in that: Titanium dioxide particles are evenly distributed on the polyacrylonitrile fiber line.

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