A health sleep pillow with partition pressure relief and a preparation method thereof

Abstract

The present application relates to the technical field of healthy sleep pillow, and discloses a partition pressure release healthy sleep pillow and a preparation method thereof, which comprises a pillow core, wherein the pillow core is provided with at least three functional partitions, i.e., a cervical vertebra support area, a headrest pressure release area and a side-sleeping buffer area, and each functional partition is filled with a composite filling material mixed by multiple materials; the filling density of the cervical vertebra support area is 0.26-0.28 g / cm 3 , the filling density of the headrest pressure release area is 0.22-0.24 g / cm 3 , and the filling density of the side-sleeping buffer area is 0.25-0.27 g / cm 3 . The present application sets the three functional partitions, i.e., the cervical vertebra support area, the headrest pressure release area and the side-sleeping buffer area, and configures the filling densities with gradient changes, so that each partition can provide differentiated support according to the pressure requirements of different parts of the human body, the cervical vertebra area is stably supported, the headrest area is softly and pressure-released, the side-sleeping area takes into account the buffer and support, and the overall fitting comfort and pressure dispersion effect of the sleep pillow are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of healthy sleep pillow technology, and in particular to a zoned pressure-relieving healthy sleep pillow and its preparation method. Background Technology

[0002] As a bedding product that comes into close contact with the head and neck, the safety and comfort of the filling material of a sleep pillow directly affect the user's health and sleep quality. Currently, common sleep pillow filling materials on the market mainly include ordinary synthetic fiber cotton, down, latex, and single-layer memory foam. While these materials provide basic softness or support to some extent, they generally have the following shortcomings: First, material safety control is not strict. Some low-priced products use recycled fibers or inferior materials, which pose health risks such as excessive formaldehyde and heavy metal residues, making it difficult to meet the safety requirements of infants and people with sensitive skin. Secondly, the filling method is crude, often using whole core uniform filling or simple manual mixing. When materials of different densities and shapes are mixed, problems such as layering, clumping, and uneven mixing are likely to occur, resulting in uniform softness and hardness in all areas of the pillow. It cannot provide zoned support according to the differences in pressure distribution of different parts of the head and neck under different sleeping positions such as supine and side lying. The pressure dispersion effect is poor, which can easily cause the neck to be unsupported or the shoulders to be compressed. Third, the product structure lacks in-depth research on ergonomics, especially the design is not adapted to the physiological characteristics of the head and neck of East Asians. There are significant differences in parameters such as cervical curvature, neck height, and shoulder width between teenagers and adults. Most existing products are generalized designs, which make it difficult to achieve a precise fit. Long-term use can easily cause neck muscle fatigue or even cervical discomfort, seriously affecting the sleep experience. Summary of the Invention

[0003] This invention provides a zoned pressure-relieving healthy sleep pillow and its preparation method to solve existing technical problems. Through zoned filling design, compounding of multiple materials and optimization of preparation process, differentiated support for different functional areas of the pillow core is achieved. Under the premise of ensuring material safety and environmental protection, the pillow's fit and comfort and pressure distribution effect are significantly improved.

[0004] To solve the above-mentioned technical problems, according to one aspect of the present invention, more specifically, a zoned pressure-relieving health sleep pillow, comprising a pillow core, wherein the pillow core is provided with at least three functional zones: a cervical spine support zone, a headrest pressure-relieving zone, and a side-sleeping buffer zone, and each functional zone is filled with a composite filling material composed of a mixture of multiple materials. The filling density of the cervical spine support area is 0.26-0.28 g / cm³. 3 The filling density of the headrest pressure relief area is 0.22-0.24 g / cm³. 3 The filling density of the side-sleeping buffer zone is 0.25-0.27 g / cm³.3 ; The composite filling material includes at least slow rebound memory foam, and also includes at least one of nano-beads, ultra-fine fibers, and natural latex.

[0005] Furthermore, the specific types of the healthy sleep pillow include cloud double-sided pillow, butterfly pillow, cloud-feeling dream pillow, youth pillow, or deep sleep O-pressure pillow.

[0006] Furthermore, when the healthy sleep pillow is a cloud-shaped double-sided pillow, the pillow core has a double-sided structure, wherein the cervical spine support area on the contact surface is an arc-shaped protrusion with a support area height of 9-11cm; wherein the cervical spine support area on the front of the cloud-shaped double-sided pillow has a concave structure with a support area height of 7-9cm.

[0007] Furthermore, when the healthy sleep pillow is a youth pillow, the cervical spine support area of ​​the pillow core has a 120° arc-shaped fitting structure, and the head and neck fitting gap is ≤1mm.

[0008] Furthermore, when the healthy sleep pillow is a deep sleep O-pressure pillow, the mass percentage of slow rebound memory foam in the composite filling material is 75-85%, of which the mass percentage of ultrafine fiber is 15-25%.

[0009] Furthermore, the nanospheres in the composite filler material have a particle size of 0.3-0.7 mm and a density of 0.8-1.2 g / cm³. 3 The density of the slow-rebound memory foam is 30-40 kg / m³. 3 The rebound time is 3-7 seconds; the fineness of the ultrafine fiber is 0.2-0.5 denier; the purity of the natural latex is ≥90%, and the Shore hardness is 25-30 HA.

[0010] A method for preparing a zoned pressure-relieving health sleep pillow includes: Step S1: Weigh at least two materials from nano-beads, slow-rebound memory foam, ultra-fine fibers, and natural latex according to the target proportions for each functional zone. Step S2: Add the weighed materials into the mixer in descending order of density, and mix for 10-14 minutes at a speed of 50-70 r / min to obtain the composite filler material. Step S3: Using a zoned quantitative filling device, the composite filling material is filled into the cervical spine support area, headrest pressure relief area and side sleeping buffer zone of the pillow core according to the target filling density of each functional zone. Step S4: After filling, sew the pillow together to obtain a healthy sleep pillow with zoned pressure relief.

[0011] Furthermore, in step S2, the order of addition from highest to lowest density is: slow-rebound memory foam, ultra-fine fiber filaments, nano-bead particles, and finally, natural latex.

[0012] Furthermore, the partitioned quantitative filling in step S3 adopts a spiral filling path, and low-frequency vibration compaction with a frequency of 40-60Hz and an amplitude of 0.3-0.7mm is applied simultaneously during the filling process.

[0013] This invention provides a zoned pressure-relieving health sleep pillow and its preparation method. Compared with existing technologies, the advantages achieved by this method are: 1. This invention sets up three functional zones: a cervical spine support zone, a headrest pressure relief zone, and a side-sleeping buffer zone. Each zone is configured with a gradient of filling density, so that each zone can provide differentiated support for the pressure needs of different parts of the body. The cervical spine zone receives stable support, the headrest zone provides soft pressure relief, and the side-sleeping zone combines cushioning and support. Overall, this significantly improves the fit, comfort, and pressure distribution effect of the sleep pillow.

[0014] 2. This invention uses a composite filling material that includes slow-rebound memory foam and is compounded with at least one of nano-bead particles, ultra-fine fibers, and natural latex. By utilizing the complementary mechanical properties of different materials, it not only ensures the slow-rebound pressure relief performance of the pillow core, but also enhances the fluidity and breathability of the filling material. This effectively improves the problems of insufficient support or a stiff feel of a single material. At the same time, the optimized material combination has good mixing stability and long-term durability.

[0015] 3. By optimizing the material feeding sequence (inputting materials in descending order of density) and controlling the mixing speed and time, this invention avoids the floating and stratification of lightweight materials and the damage of fiber materials, ensuring the uniform mixing of multi-component materials. Combined with the zoned quantitative filling device and spiral filling path, the filling density of each functional zone is precisely controllable, and there is no dead corner coverage in the corner areas, which significantly improves the consistency between product batches and the reliability of filling quality.

[0016] 4. This invention features a double-sided concave-convex structure for the cloud-shaped double-sided pillow, an arc-shaped fitting structure for the youth pillow, and an optimized material ratio for the deep sleep pillow. This allows different types of sleep pillows to be precisely adapted to the physiological characteristics and usage scenarios of different groups of people. While ensuring the core pressure relief function, it expands the product's versatility and applicability. Furthermore, the manufacturing process is consistent, easy to operate, and easy to achieve mass production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cloud-shaped double-sided pillow in this invention; Figure 2 This is a schematic diagram of the butterfly-shaped pillow in this invention; Figure 3 This is a schematic diagram of the cloud-sensing dream pillow of the present invention; Figure 4 This is a schematic diagram of the youth pillow in this invention; Figure 5 This is a schematic diagram of the deep sleep O-pressure pillow in this invention.

[0018] In the diagram: 1. Cervical spine support area; 2. Headrest pressure relief area; 3. Side sleeping buffer zone. Detailed Implementation

[0019] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1

[0021] like Figure 1 As shown, this embodiment provides a zoned pressure-relieving healthy sleep pillow, specifically a cloud double-sided pillow, including a pillow core. The pillow core is provided with three functional zones: a cervical spine support zone 1, a headrest pressure-relieving zone 2, and a side-sleeping buffer zone 3. Each functional zone is filled with a composite filling material made of a mixture of various materials.

[0022] In this embodiment, the pillow core has a double-sided structure. The cervical support area 1 on the contact surface is an arc-shaped protrusion with a height of 10cm; the cervical support area 1 on the cloud surface is a concave structure with a height of 8cm. The arc of the support area on the contact surface is 110°, which is adapted to the physiological curvature of the adult cervical spine; the cloud surface adopts a concave structure to provide a soft touch.

[0023] In this embodiment, the filling density of the cervical spine support area 1 is 0.28 g / cm³. 3 The filling density of the headrest pressure relief area 2 is 0.24 g / cm³. 3 The fill density of the side-sleeping buffer zone 3 is 0.26 g / cm³. 3 The three functional zones feature a gradient filling density design, with the cervical spine support zone having the highest density for stable support; the headrest pressure relief zone having the lowest density for soft pressure relief; and the side sleeping buffer zone having a medium density, balancing support and comfort.

[0024] In this embodiment, the composite filling material comprises four materials: nanospheres, slow-rebound memory foam, ultra-fine fibers, and natural latex. The nanospheres have a particle size of 0.5 mm and a density of 1.0 g / cm³. 3 The density of slow rebound memory foam is 35 kg / m³. 3 The rebound time is 5 seconds; the fineness of the ultrafine fiber is 0.3 denier and the length is 5 mm; the purity of the natural latex is 92% and the Shore hardness is 28 HA.

[0025] In this embodiment, the composite filling material ratio of the bonding surface of the cloud double-sided pillow is: 45% nano-microbeads, 30% slow rebound memory foam, 10% microfiber filaments, and 15% natural latex (by weight); the composite filling material ratio of the cloud side is: 35% nano-microbeads, 20% slow rebound memory foam, 30% microfiber filaments, and 15% natural latex (by weight).

[0026] In this embodiment, the preparation method of the cloud double-sided pillow includes the following steps: Step S1: Weigh out the nano-beads, slow-rebound memory foam, microfiber filaments, and natural latex according to the target proportions for each functional zone. Specifically, weigh out the materials in the cervical spine support zone in a ratio of 45:30:10:15, in the headrest pressure relief zone in a ratio of 35:20:30:15, and in the side-sleeping buffer zone in a ratio of 40:25:25:10.

[0027] Step S2: Add the weighed materials into the mixer in descending order of density, i.e., first add slow rebound memory foam (highest density), then add ultra-fine fiber filaments, then add nano-bead particles, and finally add natural latex (lowest density). Mix for 12 minutes at a speed of 60 r / min to obtain the composite filler material.

[0028] Step S3: Using a zoned quantitative filling device, the composite filling material is filled into the cervical support area 1, headrest pressure relief area 2, and side-sleeping buffer area 3 of the pillow core according to the target filling density of each functional zone. A spiral filling path is used, with the filling gun moving spirally along the contour of each zone to ensure full coverage of the corner areas. During the filling process, low-frequency vibration at 50Hz and an amplitude of 0.5mm is applied simultaneously to compact the material naturally, avoiding voids. After filling, a secondary compaction test is performed. If insufficient density is detected in any area, the replenishment program is automatically initiated.

[0029] Step S4: After filling, use a computerized flat sewing machine to sew the filling with a stitch length of 12 stitches per inch to ensure a smooth seam and obtain a cloud-shaped double-sided pillow.

[0030] In this embodiment, the cloud-shaped double-sided pillow was tested by the Tekscan F-Scan pressure distribution testing system. The pressure dispersion rate under adult supine sleeping position reached 89%, which is 41.3% higher than that of traditional down pillows (63%). The filling uniformity deviation was 1.4% as detected by X-ray tomography, which meets the uniformity requirements.

[0031] Example 2

[0032] like Figure 4As shown, this embodiment provides a zoned pressure-relieving healthy sleep pillow, specifically a youth pillow, which includes a pillow core. The pillow core is provided with three functional zones: a cervical spine support zone 1, a headrest pressure-relieving zone 2, and a side-sleeping buffer zone 3.

[0033] In this embodiment, the cervical spine support area 1 of the pillow core has a 120° arc-shaped fit structure, and the width of the neck and pillow part is 12cm, based on the cervical curvature data of adolescents (cervical curvature 8.3±1.0cm). -1 The design ensures a seamless fit between the head and neck. The product dimensions are 56cm × 35cm × 8cm, and the weight is kept under 800g.

[0034] In this embodiment, the filling density of the cervical spine support area 1 is 0.26 g / cm³. 3 The filling density of the headrest pressure relief area 2 is 0.22 g / cm³. 3 The filling density of the side-sleeping buffer zone 3 is 0.25 g / cm³. 3 .

[0035] In this embodiment, the composite filling material comprises slow-rebound memory foam, nano-beads, and ultra-fine fibers, but does not contain natural latex. The density of the slow-rebound memory foam is 35 kg / m³. 3 The rebound time is 5 seconds; the particle size of the nanospheres is 0.5 mm, and the density is 1.0 g / cm³. 3 The fineness of the ultrafine fiber is 0.3 denier.

[0036] In this embodiment, the composite filling material adopts a gradient layered design: the upper layer uses ultra-fine fiber cotton (density 0.22g / cm³). 3 The lower layer uses a mixture of slow-rebound memory foam and nano-beads (density 0.26 g / cm³), providing a soft touch; the lower layer uses a mixture of slow-rebound memory foam and nano-beads (density 0.26 g / cm³). 3 It provides stable support. The overall formula is: 40% nano-beads, 35% slow-rebound memory foam, and 25% ultra-fine fiber (by weight).

[0037] In this embodiment, the preparation method of the youth pillow includes the following steps: Step S1: Weigh out the nano-beads, slow-rebound memory foam and ultra-fine fiber filaments according to the target ratio (40:35:25).

[0038] Step S2: The weighed materials are added into the mixer in descending order of density, i.e., first the slow rebound memory foam, then the ultra-fine fiber, and finally the nano-bead particles. The mixture is mixed for 12 minutes at a speed of 60 r / min to obtain the composite filler material.

[0039] Step S3: Filling is carried out using a zoned quantitative filling device. The filling adopts a spiral filling path, and low-frequency vibration compaction with a frequency of 50Hz and an amplitude of 0.5mm is applied simultaneously.

[0040] Step S4: After filling, sew the pillow together to obtain the youth pillow.

[0041] In this embodiment, the prepared youth pillow was tested with a three-dimensional fit measurement instrument. The head-neck fit gap of 20 samples was between 0.6-0.9 mm, with an average of 0.76 mm, meeting the requirement of ≤1 mm. Electromyography (EMG) testing showed that after 4 hours of use, the reduction rate of neck muscle fatigue reached 38.4%-39.3%, significantly better than traditional youth pillows.

[0042] Example 3

[0043] like Figure 2 As shown, this embodiment provides a zoned pressure-relieving healthy sleep pillow, specifically a butterfly-shaped pillow, including a pillow core. The pillow core is provided with three functional zones: a cervical spine support zone 1, a headrest pressure-relieving zone 2, and a side-sleeping buffer zone 3.

[0044] In this embodiment, the filling density of the cervical spine support area 1 is 0.27 g / cm³. 3 The filling density of the headrest pressure relief area 2 is 0.23 g / cm³. 3 The fill density of the side-sleeping buffer zone 3 is 0.26 g / cm³. 3 The support area has a height of 9-11cm and an arc of 105±5°.

[0045] In this embodiment, the composite filling material comprises nano-beads, slow-rebound memory foam, microfiber filaments, and natural latex. The ratio is: 50% nano-beads, 30% slow-rebound memory foam, 10% microfiber filaments, and 10% natural latex (by weight). The specifications of each material are the same as in Example 1.

[0046] In this embodiment, the preparation method of the butterfly pillow is carried out according to steps S1 to S4 of Example 1, the mixing speed is 60 r / min, the mixing time is 12 min, the filling adopts a spiral filling path and low-frequency vibration is applied simultaneously for compaction.

[0047] In this embodiment, the butterfly-shaped pillow was tested by a pressure distribution testing system. The pressure dispersion rate of the pillow under adult side-lying sleeping position reached 86%, which is 40.5% higher than that of traditional chemical fiber pillows (61%), meeting the requirement of ≥40% improvement in body pressure dispersion rate.

[0048] Example 4

[0049] like Figure 3As shown, this embodiment provides a zoned pressure-relieving healthy sleep pillow, specifically a cloud-feeling dream pillow, which includes a pillow core. The pillow core is provided with three functional zones: a cervical spine support zone 1, a headrest pressure-relieving zone 2, and a side-sleeping buffer zone 3.

[0050] In this embodiment, the filling density of the cervical spine support area 1 is 0.27 g / cm³. 3 The filling density of the headrest pressure relief area 2 is 0.23 g / cm³. 3 The fill density of the side-sleeping buffer zone 3 is 0.26 g / cm³. 3 .

[0051] In this embodiment, the composite filling material comprises nano-beads, slow-rebound memory foam, microfiber filaments, and natural latex. The ratio is: 40% nano-beads, 30% slow-rebound memory foam, 20% microfiber filaments, and 10% natural latex (by weight).

[0052] In this embodiment, the preparation method of the Cloud-Feeling Dream Pillow is performed according to steps S1 to S4 of Example 1. The prepared Cloud-Feeling Dream Pillow was tested by a pressure distribution testing system, and the pressure dispersion rate reached 86% in the adult supine sleeping position, which is 40.9% higher than that of traditional products.

[0053] Example 5

[0054] like Figure 5 As shown, this embodiment provides a zoned pressure-relieving healthy sleep pillow, specifically a deep sleep zero-pressure pillow, which includes a pillow core. The pillow core is provided with three functional zones: a cervical spine support zone 1, a headrest pressure-relieving zone 2, and a side-sleeping buffer zone 3.

[0055] In this embodiment, the filling density of the cervical spine support area 1 is 0.26 g / cm³. 3 The filling density of the headrest pressure relief area 2 is 0.22 g / cm³. 3 The filling density of the side-sleeping buffer zone 3 is 0.25 g / cm³. 3 .

[0056] In this embodiment, the composite filling material comprises slow-rebound memory foam and microfiber filaments, but does not contain nano-beads or natural latex. The slow-rebound memory foam comprises 80% by weight, and the microfiber filaments comprise 20% by weight. The density of the slow-rebound memory foam is 35 kg / m³. 3 The rebound time is 5 seconds; the fineness of the ultrafine fiber is 0.3 denier.

[0057] In this embodiment, the preparation method of the deep sleep zero-pressure pillow includes the following steps: Step S1: Weigh out the slow rebound memory foam and ultra-fine fiber filaments according to the target ratio (80:20).

[0058] Step S2: Add the weighed materials into the mixer in descending order of density, i.e., first add the slow-rebound memory foam, then add the ultra-fine fiber filaments, and mix for 12 minutes at a speed of 60 r / min to obtain the composite filling material.

[0059] Step S3: Filling is carried out using a zoned quantitative filling device. The filling adopts a spiral filling path, and low-frequency vibration compaction with a frequency of 50Hz and an amplitude of 0.5mm is applied simultaneously.

[0060] Step S4: After filling, sew the pillow to obtain a deep sleep zero-pressure pillow.

[0061] In this embodiment, the prepared deep sleep zero-pressure pillow was tested by a pressure distribution testing system, and the pressure dispersion rate reached 83% when adults were lying on their backs, which is 40.7% higher than that of traditional products.

[0062] In the above embodiments, the preferred ranges of the specifications of each component of the composite filler material are as follows: The nanospheres have a particle size of 0.3-0.7 mm and a density of 0.8-1.2 g / cm³. 3 Particle size that is too large (>0.7mm) will result in a rough feel, while particle size that is too small (<0.3mm) will easily generate dust; a density within the above range can ensure good flowability and uniform mixing.

[0063] Slow rebound memory foam has a density of 30-40 kg / m³. 3 The rebound time is 3-7 seconds. The density is less than 30 kg / m³. 3 Insufficient support, exceeding 40 kg / m 3 The softness decreases over time; a rebound time of 3-7 seconds can balance the slow rebound characteristics and response speed, avoiding the loss of pressure relief effect due to excessively fast rebound or the feeling of sinking due to excessively slow rebound.

[0064] The fineness of ultrafine fibers is 0.2-0.5 denier. When the fineness is less than 0.2 denier, the fiber strength is insufficient and it is easy to break; when it is greater than 0.5 denier, the softness decreases and the feel is affected.

[0065] Natural latex has a purity of ≥90% and a Shore hardness of 25-30 HA. A purity below 90% indicates more impurities, affecting safety and performance stability; a Shore hardness within the above range balances elasticity and support.

[0066] In the preparation methods of the above embodiments, the preferred ranges of process parameters for each step are as follows: Mixing speed: 50-70 r / min. When the speed is below 50 r / min, the mixing efficiency is insufficient and the material is not mixed evenly; when the speed is above 70 r / min, it is easy to damage the slow rebound memory foam and ultra-fine fiber filaments, affecting the material performance.

[0067] Mixing time: 10-14 min. If the mixing time is less than 10 min, the materials will not be mixed sufficiently; if it exceeds 14 min, the improvement in mixing uniformity will not be significant, and energy consumption and production time will increase.

[0068] Material addition order: Add materials in descending order of density, i.e., slow-rebound memory foam → microfiber → nano-beads → natural latex. This order prevents low-density materials (such as nano-beads) from floating on the surface and causing uneven mixing.

[0069] Fill path: Spiral fill path, the fill gun moves spirally along the contour of each zone to ensure full coverage of the corner areas and avoid the problem of insufficient corner filling caused by straight fill.

[0070] Vibration compaction parameters: frequency 40-60Hz, amplitude 0.3-0.7mm. Compaction effect is insufficient when the frequency is below 40Hz or the amplitude is below 0.3mm; the material structure may be damaged when the frequency is above 60Hz or the amplitude is above 0.7mm.

[0071] The zoned pressure-relieving health sleep pillows prepared in the above embodiments have all met the requirements of the third-party testing agency in terms of performance indicators. In terms of safety, according to the GB 18401-2010 Class A standard, the formaldehyde content is 5-12mg / kg, heavy metals (lead, mercury, cadmium, chromium) were not detected, the odor level is Grade 1, and the pH value is 6.8-7.1, which meets the safety requirements for products that come into direct contact with the skin.

[0072] Regarding the mixing uniformity, X-ray tomography showed that the average coefficient of variation for mixing uniformity was 1.5%, with a maximum of 1.8%, meeting the requirement of ≤2%; the average mixing ratio error was 0.5%, with a maximum of 0.8%, meeting the requirement of ≤3%.

[0073] In terms of durability, after 50 washes (according to GB / T 8629-2017 standard, water temperature 30±2℃, washing machine speed 800r / min), the product showed no deformation, no clumping of filling, and no damage to the fabric; after 10,000 compression cycles (compression amount 50%), the rebound rate was ≥85%, and there was no permanent deformation.

[0074] In terms of user experience, after a 30-day user experience test by 50 participants, the overall user satisfaction rate reached 90%, exceeding 85% of the project requirements.

[0075] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A zoned pressure-relieving health sleep pillow, characterized in that, The pillow core includes at least three functional zones: a cervical spine support zone (1), a headrest pressure relief zone (2), and a side sleeping buffer zone (3). Each functional zone is filled with a composite filling material made of a mixture of various materials. The filling density of the cervical spine support area (1) is 0.26-0.28 g / cm³. 3 The filling density of the headrest pressure relief area (2) is 0.22-0.24 g / cm³. 3 The filling density of the side-sleeping buffer zone (3) is 0.25-0.27 g / cm³. 3 ; The composite filling material includes at least slow rebound memory foam, and also includes at least one of nano-beads, ultra-fine fibers, and natural latex.

2. The zoned pressure-relieving health sleep pillow and its preparation method according to claim 1, characterized in that: The specific types of healthy sleep pillows include cloud double-sided pillows, butterfly-shaped pillows, cloud-feeling dream pillows, youth pillows, or deep sleep O-pressure pillows.

3. The zoned pressure-relieving health sleep pillow and its preparation method according to claim 2, characterized in that: When the healthy sleep pillow is a cloud double-sided pillow, the pillow core has a double-sided structure, wherein the cervical spine support area (1) on the contact surface is an arc-shaped protrusion with a support area height of 9-11cm; wherein the cervical spine support area (1) on the front of the cloud double-sided pillow has a concave structure with a support area height of 7-9cm.

4. The zoned pressure-relieving health sleep pillow and its preparation method according to claim 2, characterized in that: When the healthy sleep pillow is a youth pillow, the cervical spine support area (1) of the pillow core has a 120° arc-shaped fitting structure, and the head and neck fitting gap is ≤1mm.

5. The zoned pressure-relieving health sleep pillow and its preparation method according to claim 2, characterized in that: When the healthy sleep pillow is a deep sleep O-pressure pillow, the mass percentage of slow rebound memory foam in the composite filling material is 75-85%, of which the mass percentage of ultrafine fiber is 15-25%.

6. The zoned pressure-relieving health sleep pillow and its preparation method according to claim 1, characterized in that: The nanospheres in the composite filler material have a particle size of 0.3-0.7 mm and a density of 0.8-1.2 g / cm³. 3 The density of the slow-rebound memory foam is 30-40 kg / m³. 3 The rebound time is 3-7 seconds; the fineness of the ultrafine fiber is 0.2-0.5 denier; the purity of the natural latex is ≥90%, and the Shore hardness is 25-30 HA.

7. A method for preparing a zoned pressure-relieving health sleep pillow, characterized in that, The method for preparing the health sleep pillow with zoned pressure relief according to any one of claims 1-6 includes: Step S1: Weigh at least two materials from nano-beads, slow-rebound memory foam, ultra-fine fibers, and natural latex according to the target proportions for each functional zone. Step S2: Add the weighed materials into the mixer in descending order of density, and mix for 10-14 minutes at a speed of 50-70 r / min to obtain the composite filler material. Step S3: Using a zoned quantitative filling device, the composite filling material is filled into the cervical spine support area (1), headrest pressure relief area (2) and side sleeping buffer area (3) of the pillow core according to the target filling density of each functional zone. Step S4: After filling, sew the pillow together to obtain a healthy sleep pillow with zoned pressure relief.

8. The zoned pressure-relieving health sleep pillow and its preparation method according to claim 7, characterized in that: In step S2, the order of addition from highest to lowest density is: slow rebound memory foam, ultra-fine fiber, nano-bead particles, and finally natural latex.

9. The zoned pressure-relieving health sleep pillow and its preparation method according to claim 7, characterized in that: The partitioned quantitative filling in step S3 adopts a spiral filling path, and low-frequency vibration compaction with a frequency of 40-60Hz and an amplitude of 0.3-0.7mm is applied simultaneously during the filling process.

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