Far infrared magnetic therapy PU seat skin and preparation method thereof

Abstract

The invention relates to the field of PU, and particularly discloses a far infrared magnet therapy PU seat skin and a preparation method thereof.The far infrared magnet therapy PU seat skin sequentially comprises a base cloth layer, a solvent-free bonding layer, a high-solid foaming layer, a polyurethane surface layer and a surface layer from bottom to top; the high-solid foaming layer is prepared from the following components in parts by weight: 70 to 90 parts of high-solid resin, 5 to 8 parts of a cross-linking agent, 0.5 to 1.5 parts of a foaming agent, 0.5 to 1.0 part of a flatting agent, 10 to 15 parts of a flame retardant, 0.05 to 0.2 part of color paste, 10 to 20 parts of far infrared ceramic micro powder and 2 to 8 parts of germanite magnetic powder. The seat skin has a good far infrared ray transmission effect and high strength, and has a good health care effect.

Description

Technical Field

[0001] The present application relates to the field of automotive interiors, and more specifically, to a far-infrared magnetic therapy PU seat skin and a preparation method thereof. Background Art

[0002] Automobile drivers and passengers are prone to uncomfortable feelings such as neck fatigue and waist soreness after long-term driving. However, existing massage and health care products are usually external massage devices, which are not suitable for use in automobiles from the perspective of driving safety. Some manufacturers provide health care effects by adding a medicine layer to the seat skin, but the obtained seat skin is not comfortable enough and has insufficient strength. Some manufacturers add a certain mass of fillers to the seat skin for health care, but the health care effect is insufficient, and the strength of the obtained seat skin decreases, prone to cracks and peeling, and is not convenient for long-term use. Existing automotive interior seat leather pays insufficient attention to the riding experience and health of drivers and passengers, and cannot relieve the fatigue caused by long-term driving or riding of drivers or passengers.

[0003] Far-infrared rays are infrared rays with a wavelength of 5-15 micrometers, which are beneficial to the human body in many ways. They can not only reduce inflammation and inhibit bacteria, activate cells, but also improve blood circulation and enhance metabolism. They are known as the "light of life", but their penetrability is poor.

[0004] Therefore, there is a need to combine far-infrared rays to provide a PU seat skin for automotive interiors with a certain strength, which can provide uniform far-infrared radiation and has the effects of dredging meridians, promoting blood circulation to relieve pain, and relieving fatigue for drivers and passengers. Summary of the Invention

[0005] In order to solve the problem that the PU seat skin has both far-infrared magnetic therapy effect and strength, the present application provides a far-infrared magnetic therapy PU seat skin and a preparation method thereof.

[0006] In the first aspect, the present application provides a far-infrared magnetic therapy PU seat skin and a preparation method thereof, which are characterized in that: from bottom to top, it successively includes: a base fabric layer, a solvent-free adhesive layer, a high-solid foam layer, a polyurethane surface layer, and a surface treatment layer; the high-solid foam layer includes the following components in parts by weight: 70-90 parts of high-solid resin, 5-8 parts of cross-linking agent, 0.5-1.5 parts of foaming agent, 0.5-1.0 parts of leveling agent, 10-15 parts of flame retardant, 0.05-0.2 parts of color paste, 10-20 parts of far-infrared ceramic micropowder, and 2-8 parts of germanium stone magnetic powder.

[0007] The seat skin is prepared by successively setting a base fabric layer, a solvent-free adhesive layer, a high-solid foam layer, a polyurethane surface layer, and a topcoat layer. The structure is reasonable, the strength is uniform, and the adhesion is sufficient. The internal structure of the seat skin is uniform, suitable for far-infrared radiation, which can penetrate the skin to reach deep into the muscles and tissues, promote blood circulation, accelerate metabolism, and improve immunity. Germanium stone magnetic powder is a rare metal that can adjust the ion balance of the human body by the electron deviation under the action of body temperature, restore the normal of the body's nerve circuit, and improve the discomfort of the body. By adding a certain mass of far-infrared ceramic micro-powder and germanium stone magnetic powder to the high-solid foam layer, a seat skin with far-infrared radiation can be obtained, which can promote the blood circulation of the driver and relieve fatigue.

[0008] In a specific embodiment, the base fabric layer includes one or more of warp-knitted polyester fiber base fabric or weft-knitted polyester fiber base fabric; the solvent-free adhesive layer includes the following components in parts by weight: Material A: 90-110 parts of polyester polyol, Material B: 100-120 parts of isocyanate, 0.05-0.2 part of accelerator, 0.1-0.5 part of curing agent; the polyurethane surface layer includes the following components in parts by weight: 80-100 parts of polyurethane resin, 20-40 parts of DMF, 10-20 parts of ethyl acetate, 5-15 parts of color paste; the topcoat layer includes the following components in parts by weight: 40-60 parts of silicon PUD-modified waterborne treatment agent, 4-6 parts of static odor nitrogen propylene curing agent, 0-8 parts of hand feeling wear-resistant agent.

[0009] By adopting the above technical scheme, the connection strength between the layers of the seat skin obtained is relatively high, the permeability of far-infrared rays is relatively good, and the obtained skin seat has better effects of dispelling dampness and cold, dredging channels and collaterals, promoting blood circulation to relieve pain, and relieving fatigue.

[0010] In a specific embodiment, the polyurethane resin includes 20-30 parts of polycarbonate polyurethane resin and 40-60 parts of polyether polyurethane resin.

[0011] Polyurethane has good biocompatibility and blood compatibility, and also has excellent mechanical properties. Polycarbonate polyurethane resin has soft segments and hard segments, and has relatively excellent mechanical properties. The cohesive energy of the polyether polyurethane ether bond is low, and it has relatively excellent processing properties. Adding a certain mass of polycarbonate polyurethane resin and polyether polyurethane resin may result in better reflection of far-infrared rays inside the obtained polyurethane surface layer, and the seat skin obtained has better effects of dredging channels and collaterals, promoting blood circulation to relieve pain, and relieving fatigue.

[0012] In a specific embodiment, the high-solid foam layer further includes 10-15 parts by mass of sisal fiber and 3-5 parts by mass of ramie fiber.

[0013] By adopting the above technical solution, sisal fiber is a fiber with large round and oval cavities. The penetration depth of far-infrared rays and the average cavity radius of sisal fiber are in the same order of magnitude. The cavities form a blackbody resonant cavity, enabling far-infrared rays to enter the cavities and form multiple reflections before evenly radiating far-infrared radiation in all directions, forming a secondary wave source of far-infrared radiation. The propagation of far-infrared rays is more uniform, and the prepared skin seat has good effects of removing dampness and cold, dredging channels and activating collaterals, promoting blood circulation to relieve pain, and relieving fatigue. Ramie fiber is a fiber with a cavity whose cross-section is waist-shaped or flat, and the wall thickness is uniform, having the effect of automatically adjusting the microclimate. By adding a small amount of ramie fiber, the uniformity of far-infrared radiation between the fibers inside the prepared seat skin is further adjusted, and the seat skin has better effects of removing dampness and cold, dredging channels and activating collaterals, promoting blood circulation to relieve pain, and relieving fatigue. The sisal fiber and ramie fiber are wound together to further improve the strength of the seat skin.

[0014] In a specific embodiment, the sisal fiber is sisal fiber modified by epoxy-based silane coupling agent.

[0015] By adopting the above technical solution, the compatibility between the sisal fiber and the high-solid foam layer is better, and it is more evenly dispersed. The strength and far-infrared radiation performance of the seat skin are better. By defining the modification as being modified by epoxy-based silane coupling agent, a certain crosslinking is formed with the polyurethane surface layer, further enhancing the strength.

[0016] In a specific embodiment, the impurity content of the sisal fiber ≤ 1.0.

[0017] By adopting the above technical solution, the content of impurities in the sisal fiber is less, the barrier to far-infrared radiation is less, and the emission structure inside the prepared seat skin is relatively uniform and stable, with better radiation effect.

[0018] In a specific embodiment, the mass ratio of the epoxy-based silane-modified sisal fiber to the far-infrared ceramic micropowder is 1:(1.2 - 1.5).

[0019] By adopting the above technical solution, the far-infrared ceramic micropowder can form better radiation intensity, and the secondary radiation of the sisal fiber to the far-infrared ceramic micropowder is uniform and has good effect, which is suitable for the internal structure of the seat skin prepared in this application.

[0020] In the second aspect, this application provides a preparation method for a far-infrared magnetic therapy PU seat skin, which is characterized in that: S1: Mix the components of the polyurethane surface layer evenly by mass, de-bubble, and then coat it on the release paper, and dry it by heating with a trapezoidal temperature rise to form the polyurethane surface layer; S2: Mix the components of the high-solid foam layer evenly by mass, coat it on the polyurethane surface layer prepared in S1, and dry it by heating with a trapezoidal temperature rise to form the high-solid foam layer; S3: Mix the solvent-free adhesive layer A and B materials evenly by mass fraction respectively, and then mix the A and B materials evenly to obtain a solvent-free adhesive. Coat it on the high-solid foaming layer obtained in S2, semi-dry it in an oven, and then laminate the base fabric and heat it to dryness to obtain a PU semi-finished product. S4: Mix the components of the surface treatment layer evenly by mass fraction, coat them on the PU semi-finished product obtained in S3, and dry them by heating with a trapezoidal temperature rise to obtain the finished product.

[0021] By adopting the above technical solution, the preparation method is relatively simple, the requirements for the process are low, the connection of the obtained seat skin layer is tight, the radiation effects of the far-infrared ceramic micropowder and germanium stone magnetic powder are good, and the effects of dispelling dampness and cold, dredging channels and collaterals, promoting blood circulation to remove pain, and relieving fatigue can be better achieved.

[0022] In a specific embodiment, the thickness of the high-solid foaming layer in S2 is 0.25 - 0.45 mm, and the drying temperature is 140 - 160 °C.

[0023] In a specific embodiment, the thickness of the solvent-free adhesive in S3 is 0.12 - 0.20 mm, the semi-drying temperature is 80 - 120 °C, and the drying temperature is 130 - 150 °C.

[0024] By adopting the above technical solution, the obtained seat skin is fully dried and cured, the connection between layers is tight, it does not contain many defects and bubbles, and the strength and radiation effect are stable.

[0025] In summary, the present application has the following beneficial effects: 1. By adding far-infrared materials and medical magnet materials to the high-solid foaming layer and defining the quality and preparation steps of each surface layer, the present application radiates far-infrared light waves with a wavelength of 8 - 15 microns from the far-infrared materials. The magnetic field generated by the magnet can act on the human body better. Through the resonance absorption of this wavelength by the human body and the stimulation and transmission of magnetic field energy, a series of biological effects can be generated, thereby improving the metabolic function, activating cell tissues, improving blood circulation, increasing local blood flow, and thus achieving the effects of dispelling dampness and cold, dredging channels and collaterals, promoting blood circulation to remove pain, and relieving fatigue.

[0026] 2. By adding a certain quality of sisal fiber and ramie fiber to the high-solid foaming layer, further using reducing group silane to modify the sisal fiber, defining the mass ratio with the far-infrared ceramic micropowder and its impurity content, a relatively uniform secondary wave source radiation and microclimate regulation are formed inside the seat skin, and the obtained seat skin has better strength and radiation performance. Description of the Drawings

[0027] Figure 1 : Schematic diagram of the structure of the far-infrared magnetic therapy PU seat skin Detailed Embodiments

[0028] To further assist in understanding the technical solution of the present invention, several specific embodiments are provided to describe the technical solution of the present invention more specifically. All the described embodiments are only partial embodiments of the present invention, rather than all of them; the embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The following embodiments are further illustrations of the present invention, and the present invention is not limited thereto.

[0029] In the embodiments of the present application, the components of the preparation examples refer to the components obtained by the way of the preparation examples. In the preparation examples, examples, and comparative examples, the experimental reagents, unless otherwise specified, are all conventional commercially available brands or obtained by conventional preparation processes.

[0030] The sisal fibers with an impurity content ≤ 1.0 in the preparation examples, examples, and comparative examples are purchased from Liuan Hualong Hemp Spinning Technology Products Co., Ltd., with the product number: 01; the sisal fibers with an impurity content ≤ 5 are purchased from Nanning Jiechengxing Trading Co., Ltd., with the product number: T3; the ramie fibers are purchased from Jingde County Jinwei Hemp Industry Co., Ltd.; the apocynum fibers are purchased from Zibo Protein Fiber Textile Technology Development Co., Ltd.; the far-infrared ceramic micropowder is Hengju 85; the germanium stone magnetic powder is 001 from Nanyu Mineral Products Processing Factory, Lingshou County; the base fabric is a warp-knitted polyester fiber base fabric; the foaming agent is purchased from Shenzhen Longdi Chemical White Foaming Agent DVK-170; the silicon PUD modified water-based treatment agent is purchased from Sloko Innovative Organosilicon Materials; the odorless aziridine curing agent is purchased from Dongguan Longqin Printing Materials Co., Ltd.; the hand feel abrasion-resistant agent is purchased from Weina Aid SY-3289H, the leveling agent is purchased from Anhui Aiyota 23056, the cross-linking agent is purchased from Xuhua XH-5008, the accelerator is purchased from Aosi 1062, the curing agent is purchased from Shanghai Yexing, and the flame retardant is purchased from TRG FR-PNX.

[0031] Preparation Examples Epoxy group silane coupling agent modified sisal fibers: Preparation Example 1: Mix 3 g of epoxy group silane coupling agent KH-560, 200 ml of ethanol, and 30 g of pure water, stir evenly, immerse 100 g of sisal fibers, filter, wash twice with deionized water, and dry to obtain epoxy group silane coupling agent modified sisal fibers.

[0032] In this preparation example, the impurity content of the sisal fibers ≤ 1.0.

[0033] Preparation Example 2: Mix 3 g of epoxy group silane coupling agent KH-560, 200 ml of ethanol, and 30 g of pure water, stir evenly, immerse 100 g of sisal fibers, filter, wash twice with deionized water, and dry to obtain epoxy group silane coupling agent modified sisal fibers.

[0034] In this preparation example, the impurity content of sisal fiber is ≤5.

[0035] Sisal fiber modified with amino-silane coupling agent: Preparation Example 3: Mix 3 g of amino-silane coupling agent KH-550, 200 ml of ethanol, and 30 g of pure water, stir evenly, immerse 100 g of sisal fiber, filter, wash twice with deionized water, and dry to obtain sisal fiber modified with amino-silane coupling agent.

[0036] In this preparation example, the impurity content of sisal fiber is ≤1.0.

[0037] Apocynum fiber modified with epoxy-silane coupling agent: Preparation Example 4: Mix 3 g of epoxy-silane coupling agent KH-560, 200 ml of ethanol, and 30 g of pure water, stir evenly, immerse 100 g of apocynum fiber, filter, wash twice with deionized water, and dry to obtain apocynum fiber modified with epoxy-silane coupling agent.

[0038] In this preparation example, the impurity content of apocynum fiber is ≤1.0. Examples

[0039] Example 1 This example includes the following raw materials by mass: Solvent-free adhesive layer: Material A: 1000 g of polyester polyol, Material B: 1100 g of isocyanate, accelerator: 1 g, curing agent: 3 g; High-solid foam layer: High-solid resin: 700 g, crosslinking agent: 50 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 150 g, color paste: 2 g, far-infrared ceramic micropowder: 200 g, germanium stone magnetic powder: 20 g; Polyurethane surface layer: Polycarbonate polyurethane resin: 200 g, polyether polyurethane resin: 600 g, DMF: 200 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicon PUD-modified water-based treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feeling and wear-resistant agent: 80 g.

[0040] The preparation method is as follows: S1: Mix the components of the polyurethane surface layer by mass, defoam, and coat on the release paper, and heat and dry at 70°C - 80°C - 100°C - 120°C to form the polyurethane surface layer; S2: Mix the components of the high-solid foam layer by mass, coat on the polyurethane surface layer prepared in S1, with a coating thickness of 0.45 mm, and heat and dry at 70°C - 80°C - 110°C - 140°C to form the high-solid foam layer; S3: Mix the solvent-free adhesive layer A and B materials evenly by mass fraction respectively, and then mix the A and B materials evenly to obtain a solvent-free adhesive. Coat it on the high-solid foaming layer obtained in S2, with a coating thickness of 0.12 mm. Semi-dry it at 80 °C, then laminate the base fabric and heat-dry it at 150 °C to obtain a PU semi-finished product; S4: Mix the components of the surface treatment layer evenly by mass fraction, coat it on the PU semi-finished product obtained in S3, and heat-dry it by heating with a temperature increase from 70 °C to 80 °C to 100 °C to 120 °C to obtain the seat skin.

[0041] Example 2 This example includes the following raw materials by mass: Solvent-free adhesive layer: Material A: 900 g of polyester polyol, Material B: 1200 g of isocyanate, Promoter: 1 g, Curing agent: 3 g; High-solid foaming layer: High-solid resin: 900 g, Cross-linking agent: 150 g, Foaming agent: 5 g, Leveling agent: 10 g, Flame retardant: 150 g, Color paste: 2 g, Far-infrared ceramic micropowder: 100 g, Germanium stone magnetic powder: 80 g; Polyurethane surface layer: Polycarbonate polyurethane resin: 200 g, Polyether polyurethane resin: 600 g, DMF: 200 g, Ethyl acetate: 200 g, Color paste: 50 g; Surface treatment layer: Silicon PUD-modified water-based treatment agent: 400 g, Odorless aziridine curing agent: 40 g, Hand feeling and wear-resistant agent: 80 g.

[0042] The preparation method is as follows: S1: Mix the components of the polyurethane surface layer evenly by mass fraction, defoam and coat it on the release paper, and heat-dry it by heating with a temperature increase from 70 °C to 80 °C to 100 °C to 120 °C to form a polyurethane surface layer; S2: Mix the components of the high-solid foaming layer evenly by mass fraction, coat it on the polyurethane surface layer obtained in S1, with a coating thickness of 0.25 mm, and heat-dry it by heating with a temperature increase from 70 °C to 80 °C to 110 °C to 140 °C to form a high-solid foaming layer; S3: Mix the solvent-free adhesive layer A and B materials evenly by mass fraction respectively, and then mix the A and B materials evenly to obtain a solvent-free adhesive. Coat it on the high-solid foaming layer obtained in S2, with a coating thickness of 0.12 mm. Semi-dry it at 80 °C, then laminate the base fabric and heat-dry it at 150 °C to obtain a PU semi-finished product; S4: Mix the components of the surface treatment layer evenly by mass fraction, coat it on the PU semi-finished product obtained in S3, and heat-dry it by heating with a temperature increase from 70 °C to 80 °C to 100 °C to 120 °C to obtain the seat skin.

[0043] Example 3 This example includes the following raw materials by mass: Solvent-free adhesive layer: Material A: 1000 g of polyester polyol, Material B: 1100 g of isocyanate, accelerator: 1 g, curing agent: 3 g; High-solid foam layer: High-solid resin: 800 g, crosslinking agent: 70 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 120 g, color paste: 2 g, far-infrared ceramic micropowder: 150 g, germanium stone magnetic powder: 60 g; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, polyether polyurethane resin: 500 g, DMF: 300 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicon PUD-modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feeling and wear-resistant agent: 80 g.

[0044] The preparation method is as follows: S1: Mix the components of the polyurethane surface layer evenly by mass, defoam, and then coat it on the release paper. Heat and dry it by raising the temperature from 70°C to 80°C to 100°C to 120°C to form the polyurethane surface layer; S2: Mix the components of the high-solid foam layer evenly by mass, coat it on the polyurethane surface layer obtained in S1, with a coating thickness of 0.35 mm. Heat and dry it by raising the temperature from 70°C to 80°C to 110°C to 140°C to form the high-solid foam layer; S3: Mix Material A and Material B of the solvent-free adhesive layer evenly by mass respectively, and then mix Material A and Material B evenly to obtain the solvent-free adhesive. Coat it on the high-solid foam layer obtained in S2, with a coating thickness of 0.15 mm. Semi-dry it at 80°C, then laminate the base fabric and heat and dry it at 150°C to obtain the PU semi-finished product; S4: Mix the components of the surface treatment layer evenly by mass, coat it on the PU semi-finished product obtained in S3, and heat and dry it by raising the temperature from 70°C to 80°C to 100°C to 120°C to obtain the seat skin.

[0045] Example 4 The difference between this example and Example 3 is only that it includes the following raw materials by mass: Solvent-free adhesive layer: Material A: 1000 g of polyester polyol, Material B: 1100 g of isocyanate, accelerator: 1 g, curing agent: 3 g; High-solid foam layer: High-solid resin: 800 g, crosslinking agent: 70 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 120 g, color paste: 2 g, far-infrared ceramic micropowder: 150 g, germanium stone magnetic powder: 60 g, 100 g of sisal fiber with an impurity content ≤ 1.0, 50 g of ramie fiber; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, polyether polyurethane resin: 500 g, DMF: 300 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicon PUD modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feeling and wear-resistant agent: 80 g.

[0046] Example 5 The difference between this example and Example 3 is only that it includes raw materials with the following masses: Solvent-free adhesive layer: Material A: Polyester polyol 1000 g, Material B: Isocyanate 1100 g, Accelerator: 1 g, Curing agent: 3 g; High-solid foaming layer: High-solid resin: 800 g, Crosslinking agent: 70 g, Foaming agent: 5 g, Leveling agent: 10 g, Flame retardant: 120 g, Color paste: 2 g, Far-infrared ceramic micropowder: 150 g, Germanium stone magnetic powder: 60 g, 100 g sisal fiber of Preparation Example 1, 50 g ramie fiber; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, Polyether polyurethane resin: 500 g, DMF: 300 g, Ethyl acetate: 200 g, Color paste: 50 g; Surface treatment layer: Silicon PUD modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feeling and wear-resistant agent: 80 g.

[0047] Example 6 The difference between this example and Example 3 is only that it includes raw materials with the following masses: Solvent-free adhesive layer: Material A: Polyester polyol 1000 g, Material B: Isocyanate 1100 g, Accelerator: 1 g, Curing agent: 3 g; High-solid foaming layer: High-solid resin: 800 g, Crosslinking agent: 70 g, Foaming agent: 5 g, Leveling agent: 10 g, Flame retardant: 120 g, Color paste: 2 g, Far-infrared ceramic micropowder: 150 g, Germanium stone magnetic powder: 60 g, 100 g sisal fiber of Preparation Example 2, 50 g ramie fiber; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, Polyether polyurethane resin: 500 g, DMF: 300 g, Ethyl acetate: 200 g, Color paste: 50 g; Surface treatment layer: Silicon PUD modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feeling and wear-resistant agent: 80 g.

[0048] Example 7 The difference between this example and Example 3 is only that it includes raw materials with the following masses: Solvent-free adhesive layer: Material A: Polyester polyol 1000 g, Material B: Isocyanate 1100 g, Accelerator: 1 g, Curing agent: 3 g; High-solid foaming layer: High-solid resin: 800 g, crosslinking agent: 70 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 120 g, color paste: 2 g, far-infrared ceramic micropowder: 150 g, germanium stone magnetic powder: 60 g, 100 g sisal fiber of Preparation Example 3, 50 g ramie fiber; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, polyether polyurethane resin: 500 g, DMF: 300 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicon PUD-modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feel and wear-resistant agent: 80 g.

[0049] Example 8 The difference between this example and Example 3 is only that it includes raw materials with the following masses: Solvent-free adhesive layer: Material A: 1000 g of polyester polyol, Material B: 1100 g of isocyanate, accelerator: 1 g, curing agent: 3 g; High-solid foaming layer: High-solid resin: 800 g, crosslinking agent: 70 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 120 g, color paste: 2 g, far-infrared ceramic micropowder: 150 g, germanium stone magnetic powder: 60 g, 100 g of apocynum fiber of Preparation Example 4, 50 g of ramie fiber; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, polyether polyurethane resin: 500 g, DMF: 300 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicon PUD-modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feel and wear-resistant agent: 80 g.

[0050] Example 9 The difference between this example and Example 3 is only that it includes raw materials with the following masses: Solvent-free adhesive layer: Material A: 1000 g of polyester polyol, Material B: 1100 g of isocyanate, accelerator: 1 g, curing agent: 3 g; High-solid foaming layer: High-solid resin: 800 g, crosslinking agent: 70 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 120 g, color paste: 2 g, far-infrared ceramic micropowder: 150 g, germanium stone magnetic powder: 60 g, 100 g of sisal fiber with impurity content ≤ 1.0, 50 g of apocynum fiber; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, polyether polyurethane resin: 500 g, DMF: 300 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicon PUD-modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feel and wear-resistant agent: 80 g.

[0051] Example 10 The difference between this example and Example 3 is only that it includes raw materials with the following masses: Solvent-free adhesive layer: Material A: 1000 g of polyester polyol, Material B: 1100 g of isocyanate, accelerator: 1 g, curing agent: 3 g; High-solid foam layer: High-solid resin: 800 g, crosslinking agent: 70 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 120 g, color paste: 2 g, far-infrared ceramic micropowder: 150 g, germanium stone magnetic powder: 60 g, 125 g of sisal fiber from Preparation Example 1, 50 g of ramie fiber; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, polyether polyurethane resin: 500 g, DMF: 300 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicon PUD-modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feel and wear-resistant agent: 80 g.

[0052] Example 11 The difference between this example and Example 3 is only that it includes raw materials with the following masses: Solvent-free adhesive layer: Material A: 1000 g of polyester polyol, Material B: 1100 g of isocyanate, accelerator: 1 g, curing agent: 3 g; High-solid foam layer: High-solid resin: 800 g, crosslinking agent: 70 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 120 g, color paste: 2 g, far-infrared ceramic micropowder: 150 g, germanium stone magnetic powder: 60 g, 180 g of sisal fiber from Preparation Example 1, 50 g of ramie fiber; Polyurethane surface layer: Polycarbonate polyurethane resin: 300 g, polyether polyurethane resin: 500 g, DMF: 300 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicon PUD-modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feel and wear-resistant agent: 80 g.

[0053] Blank control group: This comparative example includes raw materials with the following masses: Solvent-free adhesive layer: Material A: 1000 g of polyester polyol, Material B: 1100 g of isocyanate, accelerator: 1 g, curing agent: 3 g; High-solid foam layer: High-solid resin: 700 g, crosslinking agent: 50 g, foaming agent: 5 g, leveling agent: 10 g, flame retardant: 150 g, color paste: 2 g; Polyurethane surface layer: Polycarbonate polyurethane resin: 200 g, polyether polyurethane resin: 600 g, DMF: 200 g, ethyl acetate: 200 g, color paste: 50 g; Surface treatment layer: Silicone PUD modified waterborne treatment agent: 400 g, odorless aziridine curing agent: 40 g, hand feeling and wear-resistant agent: 80 g.

[0054] The preparation method is as follows: S1: Mix the components of the polyurethane surface layer evenly by mass, defoam, and then coat it on the release paper. Heat and dry it by heating with a temperature rise of 70°C - 80°C - 100°C - 120°C to form a polyurethane surface layer; S2: Mix the components of the high-solid foaming layer evenly by mass, coat it on the polyurethane surface layer obtained in S1, with a coating thickness of 0.45 mm. Heat and dry it by heating with a temperature rise of 70°C - 80°C - 110°C - 140°C to form a high-solid foaming layer; S3: Mix the solvent-free adhesive layer A and B evenly by mass respectively, and then mix A and B evenly to obtain a solvent-free adhesive. Coat it on the high-solid foaming layer obtained in S2, with a coating thickness of 0.12 mm. Semi-dry it at 80°C, and then bond it to the base fabric and heat and dry it at 150°C to obtain a PU semi-finished product; S4: Mix the components of the surface treatment layer evenly by mass, coat it on the PU semi-finished product obtained in S3, and heat and dry it by heating with a temperature rise of 70°C - 80°C - 100°C - 120°C to obtain a seat skin.

[0055] Performance detection test Test 1: Select 120 taxi drivers aged between 35 - 55 years old as volunteers. These volunteers all have discomfort in the shoulders, necks or lower backs due to long-term driving. Randomly divide them into 12 groups, with 10 people in each group. After using the seat skin prepared in this application for one course of treatment, use a questionnaire survey to obtain the improvement rate (%) of discomfort. One course of treatment is 8 hours × 14 days, and the test results take the average value of each group.

[0056] Test 2: Refer to the standard QB / T 3812.5 - 99 "Determination of Tensile Strength and Elongation at Break of Leather" to detect the tensile strength of the artificial leather prepared in each example and comparative example. The test results are shown in Table 1.

[0057] Table 1 Combined with Examples 1 - 3, the blank control group and Table 1, in this application, by adding a certain mass of far-infrared material and medical magnet material to the seat skin and defining the quality and preparation steps of each surface layer, the prepared seat skin can relieve the discomfort in the lower back by improving blood circulation.

[0058] Combined with Examples 3-9 and Table 1, in the present application, sisal fibers and ramie fibers with a certain mass and a certain impurity content are added to the high-solid foaming layer to conduct secondary radiation on far-infrared rays, and the epoxy-based silane coupling agent is used to improve the dispersion uniformity, compatibility, and cross-linking degree, further enhancing the health care effect and strength of the seat skin. When adding apocynum fibers, it may be because the cross-section of apocynum fibers is irregular, the cavity is small, and the cell wall is thick, which forms a certain dissipation of far-infrared rays, resulting in poor blood circulation promoting and fatigue relieving effects of the prepared seat skin.

[0059] Combined with Examples 5, 10-11 and Table 1, in the present application, by further defining the mass ratio of epoxy-based silane-modified sisal fibers to far-infrared ceramic micropowders, a relatively uniform secondary wave source radiation is formed inside the seat skin, and the prepared seat skin has better strength and radiation performance.

[0060] The use of this specific embodiment in the present application is only an interpretation of the present application, and it is not a limitation of the present application. After reading this specification, those skilled in the art can make modifications that do not contribute creatively to this embodiment as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A far-infrared magnetic therapy PU seat surface, characterized by: From bottom to top, it includes: a base fabric layer, a solvent-free adhesive layer, a high-solid foaming layer, a polyurethane surface layer, and a surface treatment layer; the high-solid foaming layer includes the following components in parts by weight: 70-90 parts of high-solid resin, 5-8 parts of cross-linking agent, 0.5-1.5 parts of foaming agent, 0.5-1.0 parts of leveling agent, 10-15 parts of flame retardant, 0.05-0.2 parts of color paste, 10-20 parts of far-infrared ceramic powder, and 2-8 parts of germanium stone magnetic powder.

2. The far-infrared magnetic therapy PU seat surface according to claim 1, characterized in that: The base fabric layer includes one or more of a warp-knitted polyester fiber base fabric or a weft-knitted polyester fiber base fabric; the solvent-free adhesive layer includes the following components in parts by weight: material A: 90-110 parts of polyester polyol, material B: 100-120 parts of isocyanate, 0.05-0.2 parts of accelerator, and 0.1-0.5 parts of curing agent; the polyurethane surface layer includes the following components in parts by weight: 80-100 parts of polyurethane resin, 20-40 parts of DMF, 10-20 parts of ethyl acetate, and 5-15 parts of color paste; the surface treatment layer includes the following components in parts by weight: 40-60 parts of silicon PUD modified water-based treatment agent, 4-6 parts of static aziridine curing agent, and 0-8 parts of hand feel and wear resistance agent.

3. The far-infrared magnetic therapy PU seat surface according to claim 2 is characterized by: The polyurethane resin comprises 20-30 parts of polycarbonate polyurethane resin and 40-60 parts of polyether polyurethane resin.

4. The far-infrared magnetic therapy PU seat surface according to claim 1, characterized in that: The high solid content foaming layer further comprises 10-15 parts by weight of sisal fibers and 3-5 parts by weight of ramie fibers.

5. The far-infrared magnetic therapy PU seat surface according to claim 4 is characterized by: The sisal fiber is epoxy silane coupling agent modified sisal fiber.

6. The far-infrared magnetic therapy PU seat surface according to claim 4, characterized in that: The impurity content of the sisal fibers in the high-solid content foaming layer is ≤1.

0.

7. The far-infrared magnetic therapy PU seat surface according to claim 5, characterized in that: The mass ratio of the epoxy silane coupling agent modified sisal fiber and the far-infrared ceramic micropowder is 1:(1.2-1.5).

8. A method for preparing the far-infrared magnetic therapy PU seat surface according to any one of claims 1 to 7, characterized in that: The steps include: S1: uniformly mixing the components of the polyurethane surface layer according to parts by mass, applying the mixture on a release paper after degassing, and drying the mixture by trapezoidal heating to form a polyurethane surface layer; S2: uniformly mix the components of the high-solid foaming layer according to their mass parts, apply them on the polyurethane surface layer prepared in S1, heat and dry them in a trapezoidal manner to form a high-solid foaming layer; S3: The solvent-free adhesive layer material A and material B are mixed evenly according to the mass parts, and then the material A and material B are mixed evenly to obtain a solvent-free adhesive, which is applied on the high-solid foaming layer obtained in S2, semi-dried in an oven, and then laminated to the base fabric, heated and dried to obtain a PU semi-finished product; S4: uniformly mix the components of the surface layer according to the mass fraction, apply them to the PU semi-finished product obtained in S3, and heat and dry them in a trapezoidal manner to obtain a finished product.

9. The method for preparing the far-infrared magnetic therapy PU seat surface according to claim 8, characterized in that: The thickness of the high-solid foaming layer in S2 is 0.25-0.45 mm, and the drying temperature is 140-160°C.

10. The method for preparing the far-infrared magnetic therapy PU seat surface according to claim 8, characterized in that: The solvent-free adhesive in S3 has a thickness of 0.12-0.20 mm, a semi-drying temperature of 80-120° C., and a drying temperature of 130-150° C.

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