Fiber pillow inner and preparation method thereof

Abstract

A fiber pillow inner and a preparation method thereof relate to the field of home textiles. A fiber pillow inner comprises a first fiber layer and a second fiber layer, the first fiber layer and the second fiber layer are made of different materials, the outer edge of the first fiber layer and the outer edge of the second fiber layer are connected together through hot melting bonding of low-melting-point fibers, and therefore a cavity is formed between the first fiber layer and the second fiber layer. A cloth layer is laid in the cavity. The two fiber layers are arranged, the softness and the supporting performance of the pillow can be adjusted by selecting the fiber layers made of different materials, and finally the pillow inner with the supporting performance and the softness is obtained.

Description

[0001] The original application for this divisional application was filed on March 3, 2023, with application number 202310194949.9 and titled: "A Fiber Pillow Core and Its Preparation Method". Technical Field

[0002] This invention relates to the field of home textiles, specifically to pillow cores. Background Technology

[0003] Synthetic fiber pillows are affordable, lightweight, and easy to wash, making them a popular choice for pillow fillings. However, existing synthetic fiber pillows often suffer from the following problems: 1. Using softer fibers results in poor pillow support, while using more supportive fibers leads to less softness, making it difficult to achieve both; 2. The fiber layer contains loose fibers that are not fixed in place. Over time, these loose fibers shift, causing the pillow to collapse and fail to effectively support the head and neck, thus affecting sleep quality. Summary of the Invention

[0004] The purpose of this invention is to provide a fiber pillow core to solve the above-mentioned problems.

[0005] Another objective of this invention is to provide a method for preparing such a fiber pillow core.

[0006] The technical problem solved by this invention can be achieved by the following technical solutions:

[0007] A fiber pillow core is characterized in that it includes a first fiber layer and a second fiber layer, the first fiber layer and the second fiber layer are made of different materials, and the outer edges of the first fiber layer and the second fiber layer are connected together by thermal bonding of low melting point fibers, thereby forming a cavity between the first fiber layer and the second fiber layer, and a fabric layer is laid in the cavity.

[0008] The first fiber layer is a soybean fiber layer containing soybean fiber, and the second fiber layer is a polyester fiber layer containing polyester fiber.

[0009] A method for preparing a fiber pillow core, characterized by comprising the following steps:

[0010] Step 1: Mix soybean fiber and low melting point fiber in a certain proportion, open them with an opening machine and then feed them into a carding machine for carding. The carded mixed fibers are evenly spread into a certain thickness and width by a web laying machine to obtain the first fiber web. Cut the first fiber web according to the pillow core design specifications to obtain the first fiber layer.

[0011] Step 2: Mix polyester fiber and low melting point fiber in a certain proportion, open them with an opening machine and then feed them into a carding machine for carding. The carded mixed fiber is then evenly spread into a certain thickness and width by a web laying machine to obtain a second fiber web. The second fiber web is then cut according to the pillow core design specifications to obtain the second fiber layer.

[0012] Step 3: Lay the second fiber layer into the bottom layer of the pillow core mold, lay a fabric layer on the second fiber layer, and lay the first fiber layer on the fabric layer. The size of the fabric layer is smaller than the smaller size of the first fiber layer or the second fiber layer, so that the outer edges of the first fiber layer and the outer edges of the second fiber layer are exposed outside the fabric layer.

[0013] Step 4: Heat the pillow core mold to melt the low-melting-point fibers at the outer edges of the first and second fiber layers, thereby connecting the outer edges of the first and second fiber layers together by the heat fusion of the low-melting-point fibers to obtain a fiber pillow core.

[0014] Another method for preparing a fiber pillow core is characterized by comprising the following steps:

[0015] Step 1: Prepare a first fiber web containing soybean fiber. Cut the first fiber layer according to the pillow core design specifications. After cutting, the first fiber layer is obtained.

[0016] Step 2: Prepare a second fiber web containing polyester fibers. Cut the second fiber layer according to the pillow core design specifications. After cutting, the second fiber layer is obtained.

[0017] Step 3: Fill the outer edges of the first fiber layer and the second fiber layer with low-melting-point fibers. Lay the second fiber layer filled with low-melting-point fibers into the bottom layer of the pillow core mold. Lay a fabric layer on the second fiber layer. Lay the first fiber layer filled with low-melting-point fibers on the fabric layer. The size of the fabric layer is smaller than the smaller size of the first fiber layer or the second fiber layer, so that the outer edges of the first fiber layer and the second fiber layer are exposed outside the fabric layer.

[0018] Step 4: Heat the pillow core mold to melt the low-melting-point fibers at the outer edges of the first and second fiber layers, thereby connecting the outer edges of the first and second fiber layers together by the heat fusion of the low-melting-point fibers to obtain a fiber pillow core.

[0019] In both of the above preparation methods, after step 4, step 5 can be added: cooling and solidifying the fiber pillow core through a water-cooling system.

[0020] Innovations and beneficial effects:

[0021] 1. Most existing pillow cores are single-layer structures, using either softer fibers (poor support) or more supportive fibers (poor softness). The present invention has two fiber layers, allowing the softness and support of the pillow to be adjusted by selecting different fiber layers, ultimately obtaining a pillow core that balances both support and softness.

[0022] 2. In this invention, a fabric layer is laid in the cavity between the first fiber layer and the second fiber layer. The fabric layer can effectively isolate the first fiber layer and the second fiber layer, preventing the pillow from deforming or collapsing after the two fiber layers cross each other.

[0023] 3. The present invention selects materials for the first fiber layer and the second fiber layer. After selection, the skin-friendly and soft properties of soybean fiber and the high resilience and support of polyester fiber are utilized to make the pillow core stable as a whole, not easy to collapse, and soft and comfortable.

[0024] 4. The present invention selects materials for loose fibers and utilizes the low melting point of low melting point fibers to connect the outer edges of the first fiber layer and the second fiber layer together through hot melt bonding. This connection method has high consistency, no roughness, and fixes the loose fibers, which can prevent the loose fibers from slipping or shifting during use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the layer structure of the present invention;

[0026] Figure 2 This is a partial structural diagram of a fiber pillow core.

[0027] Figure 3 This is a partial structural diagram of a pillow core mold. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0029] Reference Figure 1 , Figure 2 and Figure 3 ,

[0030] Method 1 for preparing a fiber pillow core includes the following steps:

[0031] Step 1: Mix soybean fiber and low-melting-point fiber in a certain proportion, open the mixture using an opening machine, and then feed it into a carding machine for carding. The carded mixed fibers are then evenly spread into a certain thickness and width using a web-laying machine to obtain the first fiber web. The first fiber web is then cut according to the pillow core design specifications to obtain the first fiber layer 1. The preferred weight percentage of soybean fiber is 85%-90%, and the preferred weight percentage of low-melting-point fiber is 10%-15%. Features: 1. The low-melting-point fiber is more evenly distributed, resulting in higher uniformity and stability of the connection at the outer edge of the final fiber pillow core. 2. In the subsequent heat-melting stage, soybean fiber acts as the supporting fiber, and low-melting-point fiber acts as the connecting fiber. The low-melting-point fiber melts and flows and diffuses to the intersections of surrounding fibers, forming a good bonding effect. This makes the connection between soybean fibers more stable, thus solving the problem of slippage and collapse of loose fiber filling in ordinary fiber pillows, and consequently, allowing the final fiber pillow core shape to be maintained for a longer time.

[0032] Step 2: Mix polyester fibers and low-melting-point fibers in a certain proportion, open them with an opening machine, and then feed them into a carding machine for carding. The carded mixed fibers are then evenly spread into a certain thickness and width by a web-laying machine to obtain a second fiber web. The second fiber web is then cut according to the pillow core design specifications to obtain the second fiber layer 2. The polyester fibers here are preferably composed of at least one of three-dimensional 3D hollow polyester fibers, three-dimensional 7D hollow polyester fibers, and 3D antibacterial polyester fibers, preferably two or more. When composed of three types of three-dimensional 3D hollow polyester fibers, three-dimensional 7D hollow polyester fibers, and 3D antibacterial polyester fibers, the preferred mass percentages are: 30-50% three-dimensional 3D hollow polyester fibers and 30-50% three-dimensional 7D hollow polyester fibers, and 20-40% 3D antibacterial polyester fibers. Features: 1. The low-melting-point fibers are more evenly distributed, resulting in higher uniformity and stability of the connection at the outer edge of the final fiber pillow core. 2. In the subsequent hot-melt stage, polyester fibers act as supporting fibers, and low-melting-point fibers act as connecting fibers. The low-melting-point fibers melt and flow and diffuse towards the intersections of surrounding fibers, thus forming a good bonding effect. This makes the connection between polyester fibers more stable, thereby solving the problem of slippage and collapse of loose fiber filling in ordinary fiber pillows, and thus allowing the final fiber pillow core shape to be maintained for a longer time. 3. Polyester fibers are composed of a blend of multiple fibers, resulting in better support and shaping effects.

[0033] Step 3: Lay the second fiber layer 2 into the bottom layer of the pillow core mold, lay the fabric layer 3 on the second fiber layer 2, and lay the first fiber layer 1 on the fabric layer 3. The size of the fabric layer 3 is smaller than the smaller of the first fiber layer 1 or the second fiber layer 2, so that the outer edges of the first fiber layer 1 and the second fiber layer 2 are exposed outside the fabric layer 3.

[0034] Step 4: Heat the pillow core mold to melt the low-melting-point fibers at the outer edges of the first fiber layer 1 and the second fiber layer 2, thereby connecting the outer edges of the first fiber layer 1 and the second fiber layer 2 together by the heat fusion of the low-melting-point fibers to obtain a fiber pillow core.

[0035] The structure of the fiber pillow core obtained by method one is as follows:

[0036] The fiber pillow core includes a first fiber layer 1 made of a mixture of soybean fiber and low-melting-point fiber, and a second fiber layer 2 made of a mixture of polyester fiber and low-melting-point fiber. The outer edges of the first fiber layer 1 and the second fiber layer 2 are connected together by thermal bonding of low-melting-point fiber, thereby forming a cavity between the first fiber layer 1 and the second fiber layer 2. A fabric layer 3 is laid in the cavity.

[0037] Method two for preparing fiber pillow cores includes the following steps:

[0038] Step 1: Prepare a first fiber web containing soybean fiber. Cut the first fiber web according to the pillow core design specifications to obtain the first fiber layer 1. The first fiber web can be composed solely of soybean fiber.

[0039] Step 2: Prepare a second fiber web containing polyester fibers. Cut the second fiber layer 2 according to the pillow core design specifications to obtain the second fiber layer 2. The second fiber web can be composed of at least one of three-dimensional 3D hollow polyester fibers, three-dimensional 7D hollow polyester fibers, and 3D antibacterial polyester fibers, preferably two or more. When composed of three types of fibers, the preferred mass percentages are: 30-50% three-dimensional 3D hollow polyester fibers, 30-50% three-dimensional 7D hollow polyester fibers, and 20-40% 3D antibacterial polyester fibers.

[0040] Step 3: Fill the outer edges of the first fiber layer 1 and the second fiber layer 2 with low-melting-point fibers. Place the second fiber layer 2 filled with low-melting-point fibers into the bottom layer of the pillow core mold, and then lay a fabric layer 3 on top of the second fiber layer 2. Lay the first fiber layer 1 filled with low-melting-point fibers on top of the fabric layer 3, wherein the size of the fabric layer 3 is smaller than the smaller of the first fiber layer 1 or the second fiber layer 2, so that the outer edges of both the first fiber layer 1 and the second fiber layer 2 are exposed outside the fabric layer 3. Alternatively, the low-melting-point fibers can be broken into loose fibers (preferably no longer than 5 mm), and then sprinkled at the outer edges of the first fiber layer 1 and the second fiber layer 2. Then, by shaking the first fiber layer 1 and the second fiber layer 2, the low-melting-point fibers can be incorporated into the first fiber layer 1 and the second fiber layer 2. Alternatively, the low-melting-point fibers can be broken into loose fibers (preferably no longer than 5 mm), and then blown into the first fiber layer 1 and the second fiber layer 2 using high-pressure air inflation. Alternatively, the low-melting-point fibers can be broken into loose fibers (preferably no longer than 5 mm) and then injected into the first fiber layer 1 and the second fiber layer 2 via injection. Low-melting-point particles can be used instead of low-melting-point fibers.

[0041] Step 4: Heat the pillow core mold to melt the low-melting-point fibers at the outer edges of the first fiber layer 1 and the second fiber layer 2, thereby connecting the outer edges of the first fiber layer 1 and the second fiber layer 2 together by the heat fusion of the low-melting-point fibers to obtain a fiber pillow core.

[0042] The structure of the fiber pillow core obtained by the second method of preparing fiber pillow core is as follows:

[0043] The fiber pillow core includes a first fiber layer 1 made of soybean fiber and a second fiber layer 2 made of polyester fiber. The outer edges of the first fiber layer 1 and the second fiber layer 2 are connected together by heat-fusion bonding of low-melting-point fibers, thereby forming a cavity between the first fiber layer 1 and the second fiber layer 2. A fabric layer 3 is laid in the cavity.

[0044] In both of the above preparation methods, in step 4, the pillow core mold can be placed in a drying oven and heated, thereby connecting the outer edges of the first fiber layer 1 and the second fiber layer 2 together using the thermal fusion bonding of low-melting-point fibers. In this method, low-melting-point fibers not at the outer edges will also melt and flow and diffuse to the surrounding fiber intersections, thus making the connection between the fibers at that location more stable. Alternatively, the pillow core mold can be equipped with heating elements located at positions corresponding to the outer edges of the first fiber layer 1 and / or the second fiber layer 2. This allows the heating elements to heat only the outer edges of the first fiber layer 1 and / or the second fiber layer 2, thereby connecting the outer edges of the first fiber layer 1 and the second fiber layer 2 together using the thermal fusion bonding of low-melting-point fibers.

[0045] In both of the above preparation methods, a step 5 can be added after step 4: cooling and solidifying the fiber pillow core. Scheme 1 involves cooling the entire pillow core mold, thereby cooling the fiber pillow core within the mold. After cooling, the fiber pillow core is removed from the mold. Preferably, a water-cooling system is used to cool the mold. Scheme 2 involves first removing the fiber pillow core from the mold, then cooling it. This can be done using a water-cooling system, an air-cooling system, or natural cooling. Scheme 3 involves first cooling the mold to a first set temperature, then removing the fiber pillow core from the mold, and finally cooling it to a second set temperature. In Scheme 1, the mold and the fiber pillow core are cooled simultaneously. During the cooling process, the mold provides continuous support, resulting in a well-shaped and highly consistent fiber pillow core after cooling. After cooling, the fiber pillow core shrinks, and the low-melting-point fibers solidify, resulting in poor adhesion to the pillow core mold and easy demolding. However, cooling the pillow core mold consumes energy, leading to high energy consumption. Furthermore, since the pillow core mold covers the fiber pillow core, the cooling efficiency of the mold affects the overall cooling performance. Option 2 involves demolding first and then cooling. During demolding, the pillow core mold temperature is high, requiring precise operation. The low-melting-point fibers are in a molten state, easily adhering to and hooking onto the mold, causing spikes or unevenness on the surface of the demolded fiber pillow core. After demolding, the low-melting-point fibers gradually solidify. During this process, the fiber pillow core, lacking support, is easily deformed by gravity, airflow, and water flow. Option 3 is the preferred solution, effectively addressing the problems of options 1 and 2. In Option 3, the first set temperature is preferably below the melting point of the low-melting-point fibers, and the second set temperature is preferably below 20°C.

[0046] In both of the above preparation methods, in step 3, after laying the fabric layer 3 and before laying the first fiber layer 1, low-melting-point fibers can be laid around the fabric layer 3. This increases the content of low-melting-point fibers at the periphery, making the connection between the outer edges of the first fiber layer 1 and the second fiber layer 2 more stable and stronger.

[0047] Regarding layer 3

[0048] Layer 3 is preferably a polypropylene nonwoven fabric layer. The polypropylene nonwoven fabric layer can consist of a single layer or multiple layers stacked vertically. When using a stacked structure, a low-melting-point fiber layer composed of low-melting-point fibers is sandwiched between adjacent layers of polypropylene nonwoven fabric. This allows the low-melting-point fibers to fuse during hot pressing, achieving connection between the polypropylene nonwoven fabric layers and between the nonwoven fabric and the fiber layer, thus preventing displacement of the fabric layers during use. The polypropylene nonwoven fabric can have through-holes, allowing the low-melting-point fibers of the first fiber layer 1 and the second fiber layer 2 to connect during hot pressing. This also helps to fix the position of the nonwoven fabric and prevent displacement during use. The openings are preferably evenly spaced around the edge of the polypropylene nonwoven fabric layer. Furthermore, the outer edge of the polypropylene nonwoven fabric layer can be wavy, thereby increasing the total length of the outer edge and changing the shape of the connecting edge between the first fiber layer 1 and the second fiber layer 2. Similarly, this can fix the position of the nonwoven fabric and prevent it from shifting during use. The material of the fabric layer in this invention can effectively reduce the deformation of the pillow core caused by the deformation of the fabric layer during the hot melting and cooling processes.

[0049] Preferably, the fabric layer consists of two layers of polypropylene nonwoven fabric, with a tongue fabric 5 connected to the outer edges of both layers. The tongue fabrics 5 overlap vertically and extend towards the outer edges of the first fiber layer 1 and the second fiber layer 2, with the outer edges of the tongue fabric 5 protruding beyond the outer edges of the first fiber layer 1 and the second fiber layer 2. The outer edges of the first fiber layer 1 and the second fiber layer 2 are not connected at the tongue fabric 5 location due to the tongue's separation, forming a channel. In step 5, an air intake channel is formed between the two tongue fabrics 5, through which cooling gas is injected into the space between the two polypropylene nonwoven fabrics. The cooling gas then passes sequentially through the polypropylene nonwoven fabric and the fiber layer before dissipating outwards. This structure not only has high heat dissipation efficiency but also makes the pillow core more fluffy. Later, functional materials, such as fragrances, can be filled into the pillow core using the channel formed by the two tongue fabrics 5.

[0050] Yes, the outer edge of the tongue fabric 5 has an opening 4, and the pillow core mold has a columnar protrusion at the corresponding position of the opening 4. During the hot-melt stage, the columnar protrusion is inserted into the opening. With this design, the columnar protrusion and the opening work together to effectively limit the position of the tongue fabric 5, thereby limiting the position of the nonwoven fabric, thus reducing the deformation of the nonwoven fabric during the hot pressing process. In addition, it can also prevent the channel between the two layers of tongue fabric 5 from being sealed by the low melting point fiber after misalignment. During the demolding process, the fiber pillow core can be more easily separated from the pillow core mold by pulling the tongue fabric 5.

[0051] Regarding other

[0052] The first fiber layer 1 is 65-80cm long, 40-55cm wide, and 5-10cm thick. The second fiber layer 2 is 65-80cm long, 40-55cm wide, and 5-8cm thick. The fabric layer is slightly smaller than the chemical fiber layer, with a length of 59-74cm and a width of 35-50cm.

[0053] The preferred melting point of low-melting-point fibers is 110-180℃.

[0054] Regarding other

[0055] The pillow core mold preferably consists of a male mold located below with its opening facing upwards, and a female mold located above with its opening facing downwards. The male and female molds are preferably mirror-symmetrical. Alternatively, the pillow core mold is preferably a concave mold, which allows the thickness of the obtained fiber pillow core to gradually decrease from the center outwards by 1-2 cm, i.e., the thickness of the fiber pillow core gradually decreases from the center to the periphery. Alternatively, the outer edge of the first fiber layer 1 is flush with the outer edge of the female mold, and the outer edge of the second fiber layer 2 is flush with the outer edge of the male mold. Heating elements are fixed to the end face 6 of the side wall of the female or male mold. There are at least three heating elements, and the heating elements 7 are annular. The maximum temperature of each heating element gradually decreases from the outside to the inside. This causes the heating of the first fiber layer 1 and the second fiber layer 2 at their outer edges to gradually change, causing the density at the junction of the first fiber layer 1 and the second fiber layer 2 to gradually decrease from the outside to the inside, thus making the fiber pillow core gradually rise from the outside to the inside. The end faces of the side walls of the female mold and the male mold are preferably inclined. After they are engaged, the distance between the end faces of the side walls gradually increases from the outside to the inside. Using the end faces of the mold side walls for pressing not only ensures the tightness of the contact between the heating element and the fiber, but also allows for easy observation of fiber changes at the pressing point from the side of the mold, thereby determining the heat melting status of the low-melting-point fiber.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A fiber pillow core, characterized in that, It includes a first fiber layer and a second fiber layer. The first fiber layer and the second fiber layer are made of different materials. The outer edges of the first fiber layer and the second fiber layer are connected together by thermal bonding of low melting point fibers, thereby forming a cavity between the first fiber layer and the second fiber layer. A fabric layer is laid in the cavity.

2. A fiber pillow core according to claim 1, characterized in that, The first fiber layer is a soybean fiber layer containing soybean fiber, and the second fiber layer is a polyester fiber layer containing polyester fiber.

3. A fiber pillow core according to claim 1, characterized in that, The fabric layer is made of polypropylene nonwoven fabric.

4. A fiber pillow core according to claim 1, characterized in that, The melting point of the low-melting-point fiber is 110-180℃.

5. A fiber pillow core according to claim 1, characterized in that, The first fiber layer has a length of 65-80cm, a width of 40-55cm, and a thickness of 5-10cm; the second fiber layer has a length of 65-80cm, a width of 40-55cm, and a thickness of 5-8cm; the fabric layer has a length of 59-74cm and a width of 35-50cm.

6. A method for preparing a fiber pillow core, characterized in that, Includes the following steps: Step 1: Prepare a first fiber web containing soybean fiber. Cut the first fiber web according to the pillow core design specifications to obtain the first fiber layer. Step 2: Prepare a second fiber web containing polyester fibers. Cut the second fiber web according to the pillow core design specifications to obtain the second fiber layer. Step 3: Fill the outer edges of the first fiber layer and the second fiber layer with low-melting-point fibers. Lay the second fiber layer filled with low-melting-point fibers into the bottom layer of the pillow core mold. Lay a fabric layer on the second fiber layer. Lay the first fiber layer filled with low-melting-point fibers on the fabric layer. The size of the fabric layer is smaller than the smaller size of the first fiber layer or the second fiber layer, so that the outer edges of the first fiber layer and the second fiber layer are exposed outside the fabric layer. Step 4: Heat the pillow core mold to melt the low-melting-point fibers at the outer edges of the first and second fiber layers, thereby connecting the outer edges of the first and second fiber layers together by the heat fusion of the low-melting-point fibers to obtain a fiber pillow core.

7. The method for preparing a fiber pillow core according to claim 6, characterized in that, In step 1, the soybean fiber accounts for 85%-90% by weight, and the low-melting-point fiber accounts for 10%-15% by weight. In step 2, the polyester fiber is composed of at least one of three-dimensional hollow polyester fiber, three-dimensional 7D hollow polyester fiber, and 3D antibacterial polyester fiber.

8. Another method for preparing a fiber pillow core, characterized in that, Includes the following steps: Step 1: Prepare a first fiber web containing soybean fiber. Cut the first fiber web according to the pillow core design specifications to obtain the first fiber layer. Step 2: Prepare a second fiber web containing polyester fibers. Cut the second fiber web according to the pillow core design specifications to obtain the second fiber layer. Step 3: Fill the outer edges of the first fiber layer and the second fiber layer with low-melting-point fibers. Lay the second fiber layer filled with low-melting-point fibers into the bottom layer of the pillow core mold. Lay a fabric layer on the second fiber layer. Lay the first fiber layer filled with low-melting-point fibers on the fabric layer. The size of the fabric layer is smaller than the smaller size of the first fiber layer or the second fiber layer, so that the outer edges of the first fiber layer and the second fiber layer are exposed outside the fabric layer. Step 4: Heat the pillow core mold to melt the low-melting-point fibers at the outer edges of the first and second fiber layers, thereby connecting the outer edges of the first and second fiber layers together by the heat fusion of the low-melting-point fibers to obtain a fiber pillow core.

9. Another method for preparing a fiber pillow core according to claim 8, characterized in that, In step 1, the first fiber web is composed only of soybean fiber; in step 2, the second fiber web is composed of at least one of three-dimensional 3D hollow polyester fiber, three-dimensional 7D hollow polyester fiber, and 3D antibacterial polyester fiber.

10. The method for preparing a fiber pillow core according to claim 6, 7, 8 or 9, characterized in that, It also includes step 5: cooling and solidifying the fiber pillow core using a water-cooling system.

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