Fiber pillow core and preparation method thereof

Abstract

A fiber pillow core and its preparation method relate to the field of home textile products. A fiber pillow core comprises a first fiber layer and a second fiber layer. The first and second fiber layers are made of different materials. The outer edges of the first and second fiber layers are connected together using hot-melt bonding with low-melting-point fibers, thereby forming a cavity between the first and second fiber layers. A fabric layer is laid within the cavity. The fiber layer of the present invention comprises two layers, allowing the softness and support of the pillow to be adjusted by selecting fiber layers of different materials, ultimately achieving a pillow core that balances both support and softness.

Description

Technical Field

[0001] The present invention relates to the field of home textile products, in particular to a pillow core. Background Art

[0002] Synthetic fiber pillows are affordable, lightweight, and easy to wash, making them a popular choice for pillow cores. However, existing synthetic fiber pillows often suffer from the following issues: 1. Using softer fibers results in poor support, while using more supportive fibers results in poor softness, making it difficult to achieve both. 2. The fiber layer contains loose fibers, which are not fixed. Over long-term use, the loose fibers can slip, causing the pillow core to collapse, failing to effectively support the head and neck, and affecting sleep quality. Summary of the Invention

[0003] The object of the present invention is to provide a fiber pillow core to solve the above problems.

[0004] Another object of the present invention is to provide a method for preparing the fiber pillow core.

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] 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, the outer edges of the first fiber layer and the second fiber layer are connected together by hot-melt bonding of low-melting-point fibers, thereby forming a cavity between the first fiber layer and the second fiber layer, and a cloth layer is laid in the cavity.

[0007] 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.

[0008] A method for preparing a fiber pillow core, characterized by comprising the following steps:

[0009] Step 1: Soybean fiber and low-melting-point fiber are mixed in proportion, opened by an opener, and fed into a carding machine for combing. The combed mixed fiber is evenly spread into a certain thickness and width by a web laying machine to obtain a first fiber web. The first fiber web is cut according to the pillow core design specifications to obtain the first fiber layer after cutting;

[0010] Step 2: The polyester fiber and the low-melting-point fiber are mixed in proportion, opened by an opener, and fed into a carding machine for combing. The combed mixed fiber is evenly spread into a certain thickness and width by a web laying machine to obtain a second fiber web. The second fiber web is cut according to the pillow core design specifications to obtain the second fiber layer after cutting;

[0011] Step 3: Laying the second fiber layer into the bottom layer of the pillow core mold, laying a cloth layer on the second fiber layer, and laying the first fiber layer on the cloth layer, wherein the cloth layer is smaller than the first fiber layer or the second fiber layer, whichever is smaller, so that the outer edges of the first fiber layer and the outer edges of the second fiber layer are exposed outside the cloth layer;

[0012] Step 4: Heat the pillow core mold to melt the low-melting-point fibers at the outer edges of the first fiber layer and the second fiber layer, so that the outer edges of the first fiber layer and the second fiber layer are connected together by hot-melting bonding of the low-melting-point fibers to obtain a fiber pillow core.

[0013] Another method for preparing a fiber pillow core is characterized by comprising the following steps:

[0014] Step 1: preparing a first fiber web containing soybean fiber, cutting the first fiber layer according to the pillow core design specifications, and obtaining the first fiber layer after cutting;

[0015] Step 2: Prepare a second fiber web containing polyester fibers, and cut the second fiber layer according to the pillow core design specifications to obtain the second fiber layer;

[0016] Step 3: Filling the outer edges of the first fiber layer and the second fiber layer with low-melting-point fibers, laying the second fiber layer filled with low-melting-point fibers into the bottom layer of the pillow core mold, and laying a cloth layer on the second fiber layer; laying the first fiber layer filled with low-melting-point fibers on the cloth layer, wherein the cloth layer is smaller than the smaller of the first or second fiber layers, so that the outer edges of the first and second fiber layers are exposed outside the cloth layer;

[0017] Step 4: Heat the pillow core mold to melt the low-melting-point fibers at the outer edges of the first fiber layer and the second fiber layer, so that the outer edges of the first fiber layer and the second fiber layer are connected together by hot-melting bonding of the low-melting-point fibers to obtain a fiber pillow core.

[0018] In the above two preparation methods, after step 4, step 5 may be provided: cooling the fiber pillow core through a water cooling system to solidify it.

[0019] Innovations and beneficial effects:

[0020] 1. Existing pillow cores are mostly single-layer structures, using either softer fibers (poor pillow core support) or highly supportive fibers (poor pillow core softness). The fiber layer of the present invention has two layers, allowing the softness and support of the pillow to be adjusted by selecting fiber layers of different materials, ultimately obtaining a pillow core that takes both support and softness into account.

[0021] 2. In the present invention, a cloth layer is laid in the cavity between the first fiber layer and the second fiber layer. The cloth layer can effectively isolate the first fiber layer and the second fiber layer to prevent the pillow from deforming or collapsing after the two layers of fibers cross each other.

[0022] 3. The present invention selects materials for the first fiber layer and the second fiber layer. After selection, the skin-friendliness and softness of soybean fiber and the high resilience and support of polyester fiber are utilized to make the pillow core as a whole stable, not easy to collapse, soft and comfortable.

[0023] 4. The present invention selects the material of the loose fiber and utilizes the low melting point of the low-melting-point fiber 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 and no sense of snagging. It also has a fixing effect on the loose fiber, which can prevent the loose fiber from slipping and displacement during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the layer structure of the present invention;

[0025] Figure 2 It is a schematic diagram of part of the structure of the fiber pillow core;

[0026] Figure 3 It is a partial structural diagram of the pillow core mold. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0028] Reference Figure 1 、 Figure 2 and Figure 3 ,

[0029] Method 1 for preparing a fiber pillow core comprises the following steps:

[0030] Step 1: Soybean fiber and low-melting point fiber are mixed in proportion. After being opened by an opener, they are fed into a carding machine for combing. The combed mixed fiber is evenly laid out to a certain thickness and width by a web laying machine to obtain a first fiber web. The first fiber web is cut according to the pillow core design specifications to obtain a first fiber layer 1 after cutting. The weight percentage of soybean fiber is preferably 85%-90%, and the weight percentage of low-melting point fiber is preferably 10%-15%. Features: 1. The low-melting point fiber is more evenly distributed, resulting in a more uniform and stable connection at the outer edge of the final fiber pillow core. 2. In the subsequent hot melt stage, the soybean fiber serves as the supporting fiber and the low-melting point fiber serves as the connecting fiber. The low-melting point fiber melts and flows and diffuses to the intersections of the surrounding fibers, forming a good bonding effect, making the connection between the soybean fibers more stable, thus solving the problem of slippage and collapse of loose fiber filling in ordinary fiber pillows, and thus making the final fiber pillow core maintain its shape longer.

[0031] Step 2: Polyester fiber and low-melt point fiber are mixed in appropriate proportions. After opening with an opener, the mixed fiber is fed into a carding machine for combing. The combed mixed fiber is evenly laid out to a desired thickness and width using 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 a second fiber layer 2. The polyester fiber herein is preferably composed of at least one of three-dimensional hollow polyester fiber, three-dimensional 7D hollow polyester fiber, and 3D antibacterial polyester fiber, and preferably a combination of two or more. When the three types of three-dimensional hollow polyester fiber, three-dimensional 7D hollow polyester fiber, and 3D antibacterial polyester fiber are combined, the weight percentages are preferably as follows: 30-50% of the three-dimensional hollow polyester fiber, 30-50% of the three-dimensional 7D hollow polyester fiber, and 20-40% of the 3D antibacterial polyester fiber. Features: 1. The low-melt point fiber is more evenly distributed, resulting in more uniform and stable connections at the outer edges of the resulting fiber pillow core. 2. In the subsequent hot-melt stage, the polyester fibers serve as support fibers and the low-melting-point fibers serve as connecting fibers. The low-melting-point fibers melt and flow and diffuse toward the intersections of the surrounding fibers, forming a good bonding effect. This makes the connection between the polyester fibers more stable, thus solving the problem of slippage and collapse of ordinary fiber pillows with loose fiber filling, and thus making the final fiber pillow core maintain its shape longer. 3. Polyester fibers are made of a mixture of multiple fibers, which has a better support and shaping effect.

[0032] Step 3: Lay the second fiber layer 2 into the bottom layer of the pillow core mold, lay the cloth layer 3 on the second fiber layer 2, and lay the first fiber layer 1 on the cloth layer 3, wherein the size of the cloth layer 3 is smaller than the smaller one 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 outer edges of the second fiber layer 2 are exposed outside the cloth layer 3.

[0033] 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, so that the outer edges of the first fiber layer 1 and the second fiber layer 2 are connected together by hot-melting bonding of the low-melting-point fibers to obtain a fiber pillow core.

[0034] The structure of the fiber pillow core obtained by the fiber pillow core preparation method 1 is as follows:

[0035] 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 hot-melt bonding of the low-melting point fiber, thereby forming a cavity between the first fiber layer 1 and the second fiber layer 2, and a cloth layer 3 is laid in the cavity.

[0036] The second method for preparing the fiber pillow core comprises the following steps:

[0037] Step 1: Prepare a first fiber web containing soybean fiber, cut the first fiber web according to the pillow core design specifications, and obtain a first fiber layer 1 after cutting. The first fiber web can be composed only of soybean fiber.

[0038] Step 2: Prepare a second fiber web comprising polyester fibers, and 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 hollow polyester fibers, three-dimensional 7D hollow polyester fibers, and 3D antibacterial polyester fibers, and preferably two or more. When composed of three types of three-dimensional hollow polyester fibers, three-dimensional 7D hollow polyester fibers, and 3D antibacterial polyester fibers, the weight percentages are preferably as follows: 30-50% of the three-dimensional hollow polyester fibers, 30-50% of the three-dimensional 7D hollow polyester fibers, and 20-40% of the 3D antibacterial polyester fibers.

[0039] 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 lay the fabric layer 3 on top of the second fiber layer 2. Lay the first fiber layer 1 filled with low-melting-point fibers on the fabric layer 3, wherein the fabric layer 3 is smaller than the smaller of the first or second fiber layer 1, 2, so that the outer edges of the first and second fiber layers 1 and 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 in length) and then sprinkled onto the outer edges of the first and second fiber layers 1 and 2. The low-melting-point fibers can then be shaken to force them into the first and second fiber layers 1 and 2. Alternatively, the low-melting-point fibers can be broken into loose fibers (preferably no longer than 5 mm in length) and then blown into the first and second fiber layers 1 and 2 using high-pressure inflation. Alternatively, the low-melting point fibers may be broken into loose fibers (preferably with a length not greater than 5 mm), and then injected into the first fiber layer 1 and the second fiber layer 2. Low-melting point particles may be used instead of low-melting point fibers.

[0040] 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, so that the outer edges of the first fiber layer 1 and the second fiber layer 2 are connected together by hot-melting bonding of the low-melting-point fibers to obtain a fiber pillow core.

[0041] The structure of the fiber pillow core obtained by the second preparation method of the fiber pillow core is as follows:

[0042] 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 hot-melt bonding of low-melting-point fiber, thereby forming a cavity between the first fiber layer 1 and the second fiber layer 2, and a cloth layer 3 is laid in the cavity.

[0043] In the above two preparation methods, in step 4, the pillow core mold can be placed in a drying room and the entire pillow core mold can be heated, so that the outer edges of the first fiber layer 1 and the second fiber layer 2 are connected together by hot-melt bonding of low-melting-point fibers. Under this method, the low-melting-point fibers that are not at the outer edges will also melt and flow and diffuse to the intersections of the surrounding fibers, thereby making the connection between the fibers at those locations more stable. Alternatively, a heating element can be provided on the pillow core mold, and the heating element is located at a position corresponding to the outer edge of the first fiber layer 1 and / or the outer edge of the second fiber layer 2. Thus, the heating element is used to heat only the outer edge of the first fiber layer 1 and / or the outer edge of the second fiber layer 2, so that the outer edges of the first fiber layer 1 and the second fiber layer 2 are connected together by hot-melt bonding of the low-melting-point fibers.

[0044] In the above two preparation methods, after step 4, step 5 can be provided: cooling and solidifying the fiber pillow core. Option 1, cool the entire pillow core mold, thereby cooling the fiber pillow core in the pillow core mold, and then remove the fiber pillow core from the pillow core mold after cooling. At this time, it is preferred to use a water cooling system to cool the pillow core mold. Option 2, first remove the fiber pillow core from the pillow core mold, and then cool the fiber pillow core. At this time, the fiber pillow core can be cooled by a water cooling system, an air cooling system, or natural cooling. Option 3, first cool the pillow core mold, and after cooling to the first set temperature, remove the fiber pillow core from the pillow core mold, and then cool the fiber pillow core to the second set temperature. The pillow core mold and the fiber pillow core of Option 1 are cooled at the same time. During the cooling process, the pillow core mold is always supported, so the cooled fiber pillow core has a good shape and high consistency. After cooling, the fiber pillow core shrinks, and the low-melting point fiber solidifies, and has poor adhesion to the pillow core mold, so it is easy to demold. However, since the cooling of the pillow core mold consumes energy, the energy consumption is high. Moreover, the pillow core mold is wrapped around the fiber pillow core, so the cooling of the fiber pillow core will be affected by the heat dissipation efficiency of the pillow core mold. Option 2 is to demold first and then cool. During demolding, the temperature of the pillow core mold is relatively high, which requires high operation. In addition, the low-melting point fiber is in a molten state and is easy to adhere to and hook the pillow core mold, causing spikes or unevenness on the surface of the fiber pillow core after demolding. After demolding, the low-melting point fiber gradually solidifies. During this process, the fiber pillow core is easily deformed by gravity, airflow, water flow, etc. because it has no support. Option 3 is the preferred option and can effectively solve the problems in Option 1 and Option 2. In Option 3, the first set temperature is preferably lower than the melting point of the low-melting point fiber, and the second set temperature is preferably lower than 20°.

[0045] In the above two preparation methods, in step 3, after the fabric layer 3 is laid and before the first fiber layer 1 is laid, low-melting-point fibers can be laid on the periphery of the fabric layer 3. This increases the content of low-melting-point fibers at the periphery, making the connection at the outer edges of the first fiber layer 1 and the second fiber layer 2 more stable and secure.

[0046] About Layer 3

[0047] The cloth layer 3 is preferably a polypropylene non-woven fabric layer. The polypropylene non-woven fabric layer can be composed of only one layer of polypropylene non-woven fabric, or it can be composed of multiple layers of polypropylene non-woven fabric stacked up and down. When adopting an upper and lower stacking structure, a low-melting point fiber layer composed of low-melting point fibers is sandwiched between two adjacent layers of polypropylene non-woven fabric. Therefore, during hot pressing, the low-melting point fibers are heat-melted to achieve connection between each layer of polypropylene non-woven fabric and between the non-woven fabric and the fiber layer, thereby avoiding displacement of the cloth layer during use. The polypropylene non-woven fabric can be provided with openings running through the upper and lower parts, so that during hot pressing, the low-melting point fibers of the first fiber layer 1 and the second fiber layer 2 are allowed to complete the connection between the two with the help of the openings. This solution is also conducive to fixing the position of the non-woven fabric and avoiding displacement of the non-woven fabric during use. The openings are preferably arranged at equal intervals around the edge of the polypropylene non-woven fabric layer. Alternatively, the outer edge of the polypropylene non-woven fabric layer may 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 help to fix the position of the non-woven fabric and prevent it from shifting during use. The present invention selects the material of the fabric layer to effectively reduce deformation of the pillow core caused by deformation of the fabric layer during the hot melting process and the cooling process.

[0048] Preferably, the fabric layer is composed of two layers of polypropylene non-woven fabric, each of which is connected to a tongue fabric 5 at its outer edge. The tongue fabrics 5 of the two layers overlap, extending toward the outer edges of the first and second fiber layers 1, 2, and extending beyond the outer edges of the first and second fiber layers 1, 2. The outer edges of the first and second fiber layers 1, 2, are separated by the tongue fabric 5, forming a channel. In step 5, an air inlet channel is formed between the two layers of tongue fabric 5. Cooling gas is then introduced through the air inlet channel into the space between the two layers of polypropylene non-woven fabric. The cooling gas then passes through the polypropylene non-woven fabric and the fiber layers and dissipates outward. This structure not only improves heat dissipation efficiency but also makes the pillow core fluffier. The channel formed by the two layers of tongue fabric 5 can later be used to fill the pillow core with functional materials, such as fragrances.

[0049] Yes, the outer edge of the tongue cloth 5 is provided with an opening 4, and the pillow core mold is provided with a cylindrical protrusion at the position corresponding to the opening 4. During the hot-melt stage, the cylindrical protrusion is inserted into the opening. With this design, the cylindrical protrusion and the opening cooperate to effectively limit the position of the tongue cloth 5, and thus the position of the non-woven fabric, thereby reducing deformation of the non-woven fabric during the hot pressing process. In addition, it can also prevent the channel between the two layers of tongue cloth 5 from being sealed by the low-melting-point fiber after the tongue cloth 5 is misplaced. During the demolding process, the fiber pillow core can be more easily separated from the pillow core mold by pulling the tongue cloth 5.

[0050] About Others

[0051] 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.

[0052] The melting point of the low-melting-point fiber is preferably 110-180°C.

[0053] About Others

[0054] The pillow core mold preferably consists of a male mold located at the bottom with an upward opening, and a female mold located at the top with a downward opening. The male and female molds are preferably mirror-symmetrical. The pillow core mold can be preferably a concave mold, so that the middle area of ​​the obtained fiber pillow core transitions to the surrounding area, with the thickness decreasing by 1-2 cm, that is, the thickness of the fiber pillow core gradually decreases from the middle to the surrounding area. 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. The heating element is fixed to the end face 6 of the side wall of the female mold or the male mold. There are at least three heating elements, and the heating element 7 is annular. The maximum temperature of each heating element gradually decreases from the outside to the inside. This causes the heat received at the outer edges of the first fiber layer 1 and the second fiber layer 2 to gradually change, causing the density of the connection between the first fiber layer 1 and the second fiber layer 2 to gradually decrease from the outside to the inside, and thus causing the fiber pillow core to gradually rise from the outside to the inside. The end faces of the sidewalls of the female and male molds are preferably inclined. When the two are fastened together, the distance between the end faces of the sidewalls gradually increases from the outside to the inside. Using the mold's sidewall end faces for pressing not only ensures close contact between the heating element and the fiber, but also allows for easy observation of fiber changes at the press-fit point from the side of the mold, thereby determining the melting state of the low-melting-point fiber.

[0055] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a fiber pillow core, characterized in that: The steps include: Step 1: Soybean fiber and low-melting-point fiber are mixed in proportion, opened by an opener, and fed into a carding machine for combing. The combed mixed fiber is evenly spread into a certain thickness and width by a web laying machine to obtain a first fiber web. The first fiber web is cut according to the pillow core design specifications to obtain the first fiber layer after cutting; Step 2: The polyester fiber and the low-melting-point fiber are mixed in proportion, opened by an opener, and fed into a carding machine for combing. The combed mixed fiber is evenly spread into a certain thickness and width by a web laying machine to obtain a second fiber web. The second fiber web is cut according to the pillow core design specifications to obtain the second fiber layer after cutting; Step 3: Lay the second fiber layer into the bottom layer of the pillow core mold, lay the cloth layer on the second fiber layer, and lay the first fiber layer on the cloth layer, wherein the cloth layer is smaller than the first fiber layer or the second fiber layer, whichever is smaller, so that the outer edges of the first fiber layer and the outer edges of the second fiber layer are exposed outside the cloth layer; the cloth layer is composed of two layers of polypropylene non-woven fabric, and the outer edges of the two layers of polypropylene non-woven fabric are connected to tongue fabrics. The tongue fabrics of the two layers of polypropylene non-woven fabric overlap each other, and the tongue fabrics extend toward the outer edges of the first fiber layer and the second fiber layer, and the outer edges of the tongue fabrics protrude outside the outer edges of the first fiber layer and the second fiber layer; Step 4: The pillow core mold is heated to melt the low-melting-point fibers at the outer edges of the first fiber layer and the second fiber layer, thereby connecting the outer edges of the first fiber layer and the second fiber layer together by the heat-melting adhesion of the low-melting-point fibers to obtain a fiber pillow core; the outer edges of the first fiber layer and the second fiber layer are not connected together at the tongue cloth due to the isolation of the tongue, thereby forming an air intake channel; Step 5: First, cool the pillow core mold. After the temperature is cooled to a temperature lower than the melting point of the low-melting-point fiber, remove the fiber pillow core from the pillow core mold. During the demoulding process, separate the fiber pillow core from the pillow core mold by pulling the tongue cloth. Then, fill the space between the two layers of polypropylene non-woven fabrics through the air inlet channel with cooling gas. The cooling gas then passes through the polypropylene non-woven fabric and the fiber layer in turn and disperses outward, cooling the fiber pillow core to below 20°. In step 1, the weight percentage of the soybean fiber is 85%-90%, and the mass percentage of the low-melting-point fiber is 10%-15%; in step 2, the polyester fiber is composed of at least one of three-dimensional 3D hollow polyester fiber, three-dimensional 7D hollow polyester fiber, and 3D antibacterial polyester fiber; The polypropylene non-woven fabric has openings running through it from top to bottom. The openings are evenly spaced around the edge of the polypropylene non-woven fabric layer, so that during heat pressing, the low-melting-point fibers of the first fiber layer and the second fiber layer can be connected with each other through the openings.

2. The method for preparing a fiber pillow core according to claim 1, characterized in that: The outer edge of the polypropylene non-woven fabric layer is wavy.

3. The method for preparing a fiber pillow core according to claim 1, characterized in that: An opening is provided at the outer edge of the tongue cloth, and a columnar protrusion is provided at a position corresponding to the opening on the pillow core mold. During the hot-melt stage, the columnar protrusion is inserted into the opening.

4. The method for preparing a fiber pillow core according to claim 1, characterized in that: The melting point of the low-melting-point fiber is 110-180°C.

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

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