Composite structured thermal cotton strips

Abstract

To provide a cotton piece for heat retention having a composite structure with a delicate touch and excellent heat retention effect. [Solution] From top to bottom, it has an upper fine hollow fiber layer 100, a middle mixed hollow fiber layer 200, and a lower fine hollow fiber layer 300, and the middle mixed hollow fiber layer is formed by combing and mixing hollow fibers of different diameters in the diameter range of 2D to 15D.

Description

[Technical field]

[0001] The present invention belongs to the field of textile technology and relates to a fluffy, warm cotton flake and a method for producing the same. [Background technology]

[0002] In winter, temperatures are low, and especially in areas without heating, the air contains moisture, making the perceived temperature even lower. Polyester fibers have a low moisture absorption rate, so their heat retention performance does not decrease due to moisture absorption. Compared to traditional materials such as wool and cotton, they have the characteristic of not feeling heavy. In addition, polyester materials are highly moldable, so they are widely used in home textile products and cotton pieces for clothing.

[0003] Currently, the thermal cotton pieces on the market are mainly single-layered, and are made by mixing hollow fibers of different thicknesses. However, because of the single-layered structure, the air stored in the gaps between the fibers is highly mobile, and the effect of retaining temperature is low, so the temperature is easily lost and the thermal insulation effect is deteriorated. In addition, the single-layered structure contains relatively thick hollow fibers, so the texture is rough and the physical sensation when wearing or using is not good. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem that this invention aims to solve is to provide a thermal insulation cotton piece with a composite structure, which has the advantages of being soft to the touch and having good thermal insulation effect, and overcomes the shortcomings of the prior art. [Means for solving the problem]

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions. The composite structure thermal insulation cotton piece is composed of, from top to bottom, an upper fine hollow fiber layer, a middle mixed hollow fiber layer, and a lower fine hollow fiber layer, and the middle mixed hollow fiber layer is formed by combing and mixing hollow fibers of different thicknesses in the diameter range of 2D to 15D.

[0006] By adopting the above technical solution, the upper and lower layers use fine hollow fibers, which can help store more still air and improve the feel of the fabric. The middle layer is a mixture of fibers with different thicknesses from 2D to 15D. The relatively thick hollow fibers play the role of support, making the cotton pieces fluffier and forming a space for storing air. Meanwhile, the relatively thin fibers cut the air and reduce the air flow in the fibers, further improving the heat retention. In addition, the cotton pieces adopt a composite structure, and the fibers in the middle layer are fluffy and can store more air as a heat storage layer, while the fibers in the upper and lower layers are thin and play the role of a lid, blocking the cold air and reducing the air flow in the middle layer, thereby further maintaining the temperature.

[0007] In a specific embodiment of the present invention, the surface density of the thermal cotton strips is 200-500g / m 2 The mass ratio of the upper fine hollow fiber layer is 10% to 20%, the mass ratio of the middle mixed hollow fiber layer is 60% to 80%, and the mass ratio of the lower fine hollow fiber layer is 10% to 20%.

[0008] In a specific embodiment of the present invention, the length of the fine hollow fibers in the upper fine hollow fiber layer and the lower fine hollow fiber layer is 36-75mm, and the length of the hollow fibers in the middle mixed hollow fiber layer is also 36-75mm.

[0009] In a specific embodiment of the present invention, the hollow fibers of the middle mixed hollow fiber layer are single- or multi-hole three-dimensional fibers.

[0010] In a specific embodiment of the present invention, in the intermediate mixed hollow fiber layer, the mass fraction of the 10D-15D hollow three-dimensional fibers is 3-6 minutes, the mass fraction of the 5D-7D hollow three-dimensional fibers is 0-3 minutes, and the mass fraction of the 2D-3D hollow three-dimensional fibers is 3-4 minutes. Effect of the Invention

[0011] By adopting the above technical solution, the present invention has the following advantages: 1) The middle mixed hollow fiber layer is formed by combing and mixing hollow fibers of different diameters in the diameter range of 2D to 15D, which increases the fluffiness of the cotton pieces and allows more still air to be stored.

[0012] 2) The composite structure reduces thermal convection, retains temperature, and improves the thermal insulation performance of the cotton pieces.

[0013] 3) The combination of fibers of different thicknesses in the middle layer is similar to the coarse structure of the barbs and barbs in feathers, with the thick fibers playing a supporting role and the thin fibers further dividing the air and reducing the air flow, thereby further enhancing the temperature retention effect and improving the thermal insulation performance of the cotton pieces.

[0014] Therefore, the thermal insulation cotton piece of the composite structure of the present invention has the advantages of being soft to the touch and having good thermal insulation effect. [Brief description of the drawings]

[0015] [Figure 1] 1 is a diagram showing the structure of the fluffy, heat-retaining cotton piece of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] As shown in Fig. 1, the thermal insulation cotton strip of the composite structure of the present invention is composed of an upper fine hollow fiber layer 100, a middle mixed hollow fiber layer 200, and a lower fine hollow fiber layer 300. Each layer contains low melting point fibers and is heat-sealed by the low melting point fibers. The surface density of the thermal insulation cotton piece of this invention is 200-500g / m 2Among them, the mass ratio of the upper fine hollow fiber layer is 10%-20%, the mass ratio of the middle mixed hollow fiber layer is 60%-80%, and the mass ratio of the lower fine hollow fiber layer is 10%-20%.

[0017] The fine hollow fibers used in the upper and lower fine hollow fiber layers are polyester fibers and have a length of 36 to 75 mm. The length of the hollow fibers used in the middle mixed hollow fiber layer is also 36 to 75 mm, and the hollow fibers used in the middle mixed hollow fiber layer are also polyester fibers, preferably single-hole or multi-hole three-dimensional hollow polyester fibers.

[0018] In the present invention, the intermediate mixed hollow fiber layer is formed by combing and mixing hollow fibers of different thicknesses in the diameter range of 2D-15D. In a specific embodiment, the intermediate mixed hollow fiber layer has a mass fraction of 10D-15D hollow three-dimensional fibers of 3-6 minutes, a mass fraction of 5D-7D hollow three-dimensional fibers of 0-3 minutes, and a mass fraction of 2D-3D hollow three-dimensional fibers of 3-4 minutes. Here, a relatively thick single-hole or multi-hole three-dimensional fiber is selected as a support, the fiber thickness is 10D-15D, and the content is in the range of 30%-60%. If the content of coarse fibers is too low, the role of support is reduced, and conversely, if it is too high, it will affect the hand feeling and become hard. A three-dimensional hollow fiber of 6D-7D is selected as a transitional fiber, the content is 0-30%, and this fiber has a buffering effect. 2D~3D three-dimensional hollow fiber is selected as a fiber that blocks air flow, which is equivalent to the fine fibers in feathers, which divide the air and reduce the air flow within the fibers. The content is in the range of 30%~40%. That is, the middle layer contains supporting fibers that make the cotton fluffier, and also contains buffer fibers and air-dividing fibers, which can hold more still air while reducing the air flow and further improve heat retention.

[0019] The low melting point fiber is selected from those having a melting point in the range of 110 to 180° C. For example, low melting point polyolefin fiber (such as ES fiber), low melting point copolyester fiber, low melting point copolyamide fiber, low melting point corn fiber, or a composite fiber thereof can be selected.

[0020] In this embodiment, as shown in FIG. 1, the lower fine hollow fiber layer 300 is first combed and laid, the middle mixed hollow fiber layer 200 is combed and laid on top of it, and finally the upper fine hollow fiber layer 100 is combed and laid. Each layer is mixed with low melting point fiber to form a three-layer structure (the mass ratio of low melting point fiber mixed in each layer is 10-20%). This three-layer structure is sent to an oven, and each layer is bonded at a heat fusion temperature of 140-180°C to form a three-layer composite structure temperature control wool cotton piece. This manufacturing process is an existing technology, so it will not be described in detail here.

[0021] In addition to oven heating, other heat fusion methods such as steam heating, oil heating, and electric heating can also be used.

[0022] The above detailed description is merely a specific description of the possible embodiments of the present invention, and does not limit the scope of protection of the present invention. Any equivalent embodiment or modification that does not deviate from the technical spirit of the present invention shall be included in the scope of protection of the present invention.

Claims

1. From top to bottom, the membrane has an upper fine hollow fiber layer, a middle mixed hollow fiber layer, and a lower fine hollow fiber layer. The intermediate mixed hollow fiber layer is formed by combing and mixing hollow fibers of different diameters in the diameter range of 2D to 15D. A thermal insulation cotton piece having a composite structure.

2. The surface density of the heat-retaining cotton piece is 200 to 500 g / m ２ That is, 2. The thermal insulation cotton piece of claim 1 having a composite structure.

3. the length of the fine hollow fibers in the upper fine hollow fiber layer and the lower fine hollow fiber layer is 36 to 75 mm; The length of the hollow fibers in the intermediate mixed hollow fiber layer is also 36 to 75 mm.

2. The thermal insulation cotton piece of claim 1 having a composite structure.

4. The hollow fibers in the intermediate mixed hollow fiber layer are single- or multi-hole three-dimensional fibers; 2. The thermal insulation cotton piece of claim 1 having a composite structure.

5. the upper fine hollow fiber layer, the middle mixed hollow fiber layer and the lower fine hollow fiber layer are all made of polyester hollow fibers; 2. The thermal insulation cotton piece of claim 1 having a composite structure.

6. Each layer is heat-sealed with low melting point fibers.

2. The thermal insulation cotton piece of claim 1 having a composite structure.

Images