Recyclable skin for interior of vehicle and vehicle interior component comprising same

Abstract

The present invention relates to a recyclable skin for the interior of a vehicle. The recyclable skin comprises a surface layer, which surface layer is formed from a material comprising a thermoplastic copolyester elastomer by means of a calendering and / or tape casting process, wherein the thermoplastic copolyester elastomer forming the surface layer comprises a hard segment and a soft segment. The recyclable skin for the interior of the vehicle of the present invention can be integrally recycled without splitting, has the advantages of being green and environmentally friendly, and has good market application prospects.

Description

Recyclable skin for vehicle interior and vehicle interior component containing the same

[0001] This patent application claims priority to the Chinese patent application with application number 202310721062.0 filed on June 16, 2023, entitled “A recyclable surface for vehicle interior and a vehicle interior component comprising the recyclable surface”, the entire text of which is hereby expressly incorporated herein by reference. Technical Field

[0002] The present invention relates to the field of recyclable surface materials for vehicle interiors, and more particularly to a recyclable surface for vehicle interiors and a vehicle interior component comprising the recyclable surface. Background Art

[0003] Environmental protection and sustainable development are currently key concerns. With increasing demands for carbon emissions, using recyclable materials and recycling products at the end of their lifespan is an effective and feasible way to reduce carbon emissions.

[0004] The surface of existing automotive interior components is typically composed of a mixture of different polymer materials, such as polyvinyl chloride (PVC), polyurethane (PU), and polyethylene terephthalate (PET). The foaming portion is typically made of polyurethane foam, a non-recyclable thermosetting material. Therefore, when existing products reach the end of their service life, if they need to be recycled, the various layers of material must first be separated. However, the actual separation process often encounters difficulties and cannot be completed or is incomplete, making subsequent recycling impossible.

[0005] CN113135003A relates to a car seat fabric with good breathability. By correspondingly installing breathable components on the upper and lower surfaces of the base layer, the two-way breathability effect of the fabric body is achieved, the overall breathability performance is enhanced, and it can be matched to operate in different working environments. By installing a silicone layer between the first breathable layer and the second breathable layer, the elastic strength of the fabric is improved and the rebound effect of the fabric is enhanced. At the same time, by uniformly opening through holes on the silicone layer, the gas can be guided and circulated, the permeability of the fabric is enhanced, and a refreshing experience for the user during use is guaranteed. With the assistance of the protective component, the wear-resistant layer is provided to enhance the wear resistance of the fabric and reduce the maintenance cost for the user.

[0006] Summary of the Invention

[0007] In order to solve the technical problems existing in the existing surfaces used for vehicle interiors, such as the use of non-recyclable materials and the inability to be recycled after the expiration of the service life, the present invention provides a recyclable surface for vehicle interiors, which can be recycled as a whole without disassembly, has the advantages of being green and environmentally friendly and has good market application prospects.

[0008] In one aspect, the present application relates to a recyclable skin for vehicle interior, comprising a surface layer; the surface layer is formed by a material comprising a thermoplastic copolyester elastomer through a calendering and / or casting process, wherein the thermoplastic copolyester elastomer forming the surface layer comprises a hard segment and a soft segment, and the hard segment of the thermoplastic copolyester elastomer forming the surface layer comprises: polybutylene terephthalate, polyethylene terephthalate, polypropylene terephthalate, poly(1,4-dimethylene cyclohexane terephthalate), poly(2,6-butylene naphthalate), poly(xylene terephthalate), polyethylene terephthalate / poly(butylene terephthalate) copolymer, poly(dimethyl terephthalate / isophthalate / 1,4-dimethyl terephthalate), poly(1,4-dimethyl terephthalate / iso ... Butanediol copolymer, polyethylene 2,5-furandicarboxylate, polypropylene 2,5-furandicarboxylate, polybutylene 2,5-furandicarboxylate, polyhexane 2,5-furandicarboxylate or a combination thereof; preferably including: polybutylene terephthalate, polybutylene 2,5-furandicarboxylate or a combination thereof; the soft segment of the thermoplastic copolyester elastomer forming the surface layer includes: polyethylene glycol, polybutylene glycol, polycaprolactone, polymethyl glycol, fatty acid dimer glycol, polytetramethylene ether, ethylene oxide-propylene oxide copolymer bisphenol A ether, polypropylene glycol, polylactide, polyglycolide or a combination thereof; preferably including: polyethylene glycol, polycaprolactone, polytetramethylene ether or a combination thereof.

[0009] In one embodiment, the recyclable skin of the present invention further comprises a bubble layer; the bubble layer is formed by a foaming process of a material comprising a thermoplastic copolyester elastomer.

[0010] In one embodiment, the recyclable skin of the present invention further comprises a fabric layer; the fabric layer is made of fibers formed from a thermoplastic polyester material, wherein the fibers formed from a thermoplastic polyester material include thermoplastic polyester fibers, thermoplastic polyester elastomer fibers, or a combination thereof.

[0011] In another aspect, the present invention also relates to a vehicle interior component comprising the recyclable skin for vehicle interior of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] For a more complete understanding of the present invention, reference should now be made to the embodiments shown in more detail in the accompanying drawings and described below by way of example of the invention, in which:

[0013] Figures 1-10: Ten exemplary embodiments of the recyclable skin of the present invention;

[0014] FIG11 shows an exemplary embodiment of a soft cover for an automobile seat, wherein the soft cover comprises the recyclable skin of the present invention;

[0015] Figure 12: A comparative solution for traditional soft coverings in automotive seats.

[0016] FIG13 shows an exemplary embodiment of a soft trim layer for an automotive interior part, wherein the soft trim layer for an automotive interior covering comprises the recyclable skin of the present invention;

[0017] Figure 14: A comparative solution for traditional soft finishing layers in automotive interiors. DETAILED DESCRIPTION

[0018] General Definitions and Terminology

[0019] Unless otherwise indicated, all publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the event of a conflict, the definitions provided herein will prevail.

[0021] Unless otherwise indicated, all percentages, parts, ratios, etc. are by weight.

[0022] When quantity, concentration or other value or parameter is given as range, preferred range or preferred upper limit and lower limit or specific value, it should be understood that all ranges formed from the paired values ​​of any upper limit range or preferred value and any lower limit range or preferred value are specifically disclosed, regardless of whether the range is disclosed separately. Unless otherwise stated, when numerical range is quoted herein, the range is meant to include its endpoints and integers and fractions within all such ranges. The scope of the present invention is not limited to the specific numerical value quoted when defining the range. For example, "1-8" encompasses 1, 2, 3, 4, 5, 6, 7, 8 and any sub-range consisting of any two values ​​thereof, such as 2-6, 3-5.

[0023] The terms "about" and "approximately" when used in conjunction with a numerical variable generally refer to the value of that variable and all values ​​of that variable are within experimental error (e.g., within a 95% confidence interval for the mean) or within ±10% of the stated value, or wider.

[0024] The terms "comprises," "includes," "has," "contains," or "involves," and other variations thereof herein, are inclusive or open-ended and do not exclude other unrecited elements or method steps. It will be understood by those skilled in the art that the above terms such as "comprising" encompass the meaning of "consisting of." The expression "consisting of" excludes any element, step, or ingredient not specified. The expression "consisting essentially of" means that the scope is limited to the specified elements, steps, or ingredients, plus the optional presence of elements, steps, or ingredients that do not materially affect the basic and novel characteristics of the claimed subject matter. It will be understood that the expression "comprising" encompasses the expressions "consisting essentially of" and "consisting of."

[0025] The term "selected from..." means one or more elements from the group listed thereafter, selected independently, and may include combinations of two or more elements.

[0026] When values ​​or end-points of a range are described herein, it should be understood that the disclosure includes the specific value or end-point recited.

[0027] As used herein, the terms "one or more" or "at least one" refer to one, two, three, four, five, six, seven, eight, nine or more.

[0028] Unless otherwise indicated, the terms "combinations thereof" and "mixtures thereof" refer to multi-component mixtures of the elements described, such as two-, three-, four- and up to the maximum possible multi-component mixtures.

[0029] In addition, if the number of parts or components of the present invention is not indicated before, it means that there is no limit to the number of occurrences (or existence) of the parts or components. Therefore, it should be interpreted as including one or at least one, and the singular form of the parts or components also includes the plural form unless the value obviously represents the singular.

[0030] As used herein, the term "optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, and that the description includes both occurring and not occurring.

[0031] When describing methods, components or steps, letters or numbers are used for identification purposes only and do not limit these methods, components or steps to be performed in the order or sequence indicated. Those skilled in the art can make reasonable adjustments.

[0032] Herein, “on one side of…” or “located on one side of…” is only used to indicate the relative positional relationship between two layers, and does not limit whether the two layers are directly adjacent.

[0033] In this article, thermoplastic polyester elastomer (TPEE) refers to a polymer composed of hard segments (typically polyester) and soft segments (typically polyester or polyether). The hard segments in these polymers have a regular structure and can phase separate into crystalline domains, maximizing the intermolecular attraction between the hard segments. These crystalline domains physically crosslink the amorphous elastic segments. These materials maintain their integrity at temperatures close to the melting point of the crystallites, only beginning to flow under the higher temperatures and shear stresses encountered during thermoplastic processing.

[0034] Unless otherwise specified, the "molecular weight of a polymer" herein refers to the weight average molecular weight of the polymer, which can be measured by conventional methods and instruments in the art.

[0035] Recycled skins for vehicle interiors

[0036] The recyclable surface for vehicle interiors of the present invention has a multi-layered structure. By rationally designing the structure of each layer (e.g., the material, hardness, thickness, and relative position of each layer), the recyclable surface of the present invention has excellent performance, making it environmentally friendly and suitable for a wide range of applications. For example, it can be used as the surface of automotive interior components such as dashboards, door panels, center consoles, armrests, or seats.

[0037] The recyclable skin of the present invention is generally used in the interior of a vehicle and can be used to cover the interior components of the vehicle, and is also referred to herein as "recyclable skin material".

[0038] The recyclable skin of the present invention may include: a surface layer; a coating layer located on one side of the surface layer; and other layers, such as a foam layer and a fabric layer, located on the side of the surface layer facing away from the coating layer.

[0039] The recyclable skin is described in detail below.

[0040] surface layer

[0041] The recyclable skin can include a surface layer. A suitable surface layer can give the product the desired properties, such as suitable color, good touch, excellent mechanical strength and wear resistance.

[0042] The skin layer may be formed of a material including thermoplastic copolyester elastomer (TPC).

[0043] Thermoplastic copolyester elastomer is a type of recyclable thermoplastic material with excellent properties, such as excellent mechanical strength, good tear resistance and abrasion resistance, chemical corrosion resistance, easy processing, and good resilience. It is suitable for use as a covering material for automotive interior parts.

[0044] Thermoplastic copolyester elastomers generally include hard segments (usually polyester segments) and soft segments (usually polyester segments or polyether segments). "Hard segments" and "soft segments" herein have the meanings known to those skilled in the art. "Hard segments" refer to the repeating, high-melting point blocks in the block copolymer that are capable of crystallization. "Soft segments" refer to the amorphous blocks in the block copolymer that have a relatively low glass transition temperature.

[0045] Appropriate hard and soft segments in thermoplastic copolyester elastomers can give the surface layer better properties: such as stretch and tear, comfort, soft touch, wear resistance, etc.

[0046] The hard segment of the thermoplastic copolyester elastomer forming the surface layer may include: polybutylene terephthalate, polyethylene terephthalate, polypropylene terephthalate, poly(1,4-dimethylene cyclohexane terephthalate), poly(2,6-butylene naphthalate), poly(xylene terephthalate), polyethylene terephthalate / polybutylene terephthalate copolymer, poly(dimethyl terephthalate / isophthalate / 1,4-butylene glycol) copolymer, polyethylene 2,5-furandicarboxylate, poly(propylene 2,5-furandicarboxylate), poly(2,5-butylene furandicarboxylate), poly(hexane 2,5-furandicarboxylate), or a combination thereof. Preferably, the hard segment of the thermoplastic copolyester elastomer forming the surface layer may include: polybutylene terephthalate, poly(2,5-furandicarboxylate), or a combination thereof.

[0047] The soft segment of the thermoplastic copolyester elastomer forming the surface layer may include polyethylene glycol, polybutylene glycol, polycaprolactone, polymethyl glycol, fatty acid dimer glycol, polytetramethylene ether, ethylene oxide-propylene oxide copolymer bisphenol A ether, polypropylene glycol, polylactide, polyglycolide, or a combination thereof. Preferably, the soft segment of the thermoplastic copolyester elastomer forming the surface layer may include polyethylene glycol, polycaprolactone, polytetramethylene ether, or a combination thereof.

[0048] The ratio of the soft segment to the hard segment in the thermoplastic copolyester elastomer can be within a suitable range to impart good properties to the resulting surface layer. The molar ratio of the hard segment to the total copolyester elastomer is preferably in the range of 25% to 60%, preferably 30% to 40%, and the molar ratio of the soft segment to the total copolyester elastomer is preferably in the range of 40% to 75%, preferably 60% to 70%.

[0049] In the present invention, it is preferred to use a thermoplastic copolyester elastomer with a higher molecular weight to form the surface layer, which is conducive to the optimization of the surface layer performance. The molecular weight of the thermoplastic copolyester elastomer can be 20,000-40,000, preferably 30,000-40,000, and more preferably 33,000-38,000.

[0050] The material forming the surface layer can be basically composed of thermoplastic copolyester elastomer. For example, the content of thermoplastic copolyester elastomer in the material forming the surface layer can be more than 80wt%, preferably more than 85wt%, and more preferably more than 90wt%. The material forming the surface layer can also contain conventional additives in the art (including but not limited to colorants, antioxidants, etc.). It should be understood that the addition of additives is used to appropriately adjust the properties of the system, and the amount used should generally not be too high. In the present application, the material forming the surface layer may not contain resin (such as compatible resin), which is conducive to the overall recycling of the product. In one embodiment, the surface layer of the present invention can be formed by a thermoplastic copolyester elastomer through a calendering and / or casting process.

[0051] In order to balance the requirements for mechanical properties, tactile feel, etc. in different usage scenarios, the present invention rationally designs the thickness, hardness, and density of the surface layer material (especially the thermoplastic copolyester elastomer described above) to achieve a better match between the surface layer material and structure, thereby achieving better performance while meeting automotive regulations.

[0052] The thickness of the surface layer of the present invention can be 0.1-1.5 mm, preferably 0.3-1 mm, and more preferably 0.5-0.8 mm. If the surface layer is too thick, the surface hardness may be too high, reducing the overall softness of the product, affecting the feel and comfort of the product. Furthermore, if the surface layer is too thick, the material consumption will increase, leading to increased product costs. If the surface layer is too thin, the surface strength will be too low, and it may easily break during use.

[0053] The hardness of the surface layer of the present invention can be 20D-60D. If the hardness of the surface layer is too high, the softness of the skin may be reduced, and the feel and comfort may be reduced; if the hardness of the surface layer is too low, the product may be difficult to form and have low strength.

[0054] The density of the surface layer can be 1000-1200 kg / m 3 If the density of the surface layer is too high, the product may be heavy, which is not conducive to lightweighting and low cost. At the same time, the increased density may increase the hardness of the surface layer, affecting the feel and comfort of the product. If the density of the surface layer is too low, the surface layer will not be dense enough, and the tensile strength and elongation at break will not meet the requirements.

[0055] The surface layer can be formed from a material comprising a thermoplastic polyester elastomer using a suitable processing technique. For overall recycling and performance optimization, the surface layer material may not contain a compatible resin. Therefore, selecting a suitable processing technique is crucial for obtaining the surface layer of the present invention.

[0056] The present invention can use a calendering or casting process. During the calendering process, the shear force generated between the rollers causes the thermoplastic copolyester elastomer material to be squeezed and sheared multiple times, thereby increasing plasticity and extending it into a surface layer with target thickness, density and hardness on the basis of further plasticization. Compared with other processing techniques (such as injection molding), calendering helps to accurately adjust the density and hardness of the surface layer, thereby obtaining the target surface layer. In addition, under the premise of ensuring product quality, the injection molding process has certain limitations on the thickness of the obtained epidermis, and it is generally difficult to prepare a surface layer with a thickness of less than 0.8 mm. The present application adopts a calendering or casting process to prepare the epidermis, which can obtain a high-quality surface layer with a lower thickness. For a surface layer with a thickness of less than 0.5 mm, it can also be prepared by a calendering or casting process. The epidermis obtained by injection molding is generally of high hardness, and it is difficult to prepare a surface layer with a hardness of less than 50D by an injection molding process. The surface layer using a calendering or casting process in the present application can achieve a hardness of less than 40D.

[0057] Therefore, the present application adopts a calendering or casting process to prepare the surface layer. Compared with other methods (such as injection molding), the surface layer obtained can be thinner and softer, which can make the final product feel better and lighter. In particular, for the surface layer that needs to be light-transmitting, the product prepared by calendering or casting will have more advantages.

[0058] Applying a suitable coating to the surface of the surface layer can impart excellent scratch resistance, wear resistance, light resistance, and yellowing resistance, thereby extending the product's service life. The coating can be located on one or both sides of the surface layer. For cost considerations, the coating can be provided on only one side of the surface layer. In actual use, the coating can be located on the side of the surface layer closest to the user, that is, the user can touch or see the coated surface layer, thereby reducing the impact of external factors (such as light, scratches, etc.) on the product.

[0059] The coating of the present invention can be formed from a waterborne polyurethane system and / or an acrylic system. The waterborne polyurethane system useful in the present invention can include: water, a waterborne polyurethane resin (which can be included in a matte resin and / or a glossy resin), and a curing agent (which can include a polycarbodiimide curing agent and / or an isocyanate curing agent). Depending on the desired feel of the surface, the waterborne polyurethane system can be adjusted by adding appropriate amounts of a feel agent, a leveling agent, a defoaming agent, a thickener, and the like. The coating formed from the waterborne polyurethane system can exhibit good adhesion to the surface layer of the present invention. The acrylic system can include an acrylic surface treatment agent (for example: basic components: water, water-based acrylic resin, curing agent, auxiliary formula: feel agent, leveling agent, defoaming agent). In order to increase the bonding strength between the coating and the surface layer, a curing cross-linking agent or modified resin (for example: isocyanate curing cross-linking agent, modified water-based polyurethane resin, modified water-based acrylate resin, etc.) that can react with the surface active groups can be added to the acrylic system. The coating formed by these systems has good adhesion to the surface layer, the coating is not easy to fall off, which is conducive to extending the service life and making the product more environmentally friendly.

[0060] The coating weight can account for 0.05%-0.2% of the total weight of the recyclable surface. If the coating weight ratio is too high, the coating may have a negative impact on the overall recyclability of the product; if the coating weight ratio is too low, the performance of the surface cannot be fully optimized.

[0061] The thickness of the coating can improve the performance of the product without compromising the overall recyclability of the product. The coating thickness can be 2-50 μm, preferably 10-30 μm, and more preferably 10-20 μm.

[0062] The color of the surface and coating can be adjusted according to the application scenario to give users a good visual experience.

[0063] Figure 1 shows an embodiment of a recyclable skin. The recyclable skin comprises a surface layer 2 and a coating layer 1 located on one side of the surface layer 2. The recyclable skin can be used to cover automotive interior components such as dashboards, door panels, and center consoles.

[0064] Bubble layer

[0065] The recyclable skin may further include a foam layer located on one side of the surface layer. The foam layer may be formed from a material comprising a thermoplastic polyester elastomer through a foaming process. To reduce solvent residues that may be caused by chemical foaming, physical foaming may be used.

[0066] The thermoplastic polyester elastomer foam formed by a foaming process using a material containing a thermoplastic polyester elastomer has good resilience and support properties and is suitable for use as the foam layer of the present invention.

[0067] The thermoplastic polyester elastomer of the bubble layer comprises a hard segment and a soft segment. The hard segment of the thermoplastic polyester elastomer forming the bubble layer may include: polybutylene terephthalate, polyethylene terephthalate, polypropylene terephthalate, poly(1,4-dimethylene cyclohexane terephthalate), poly(2,6-butylene naphthalate), poly(xylene terephthalate), polyethylene terephthalate / polybutylene terephthalate copolymer, poly(dimethyl terephthalate / isophthalate / 1,4-butylene glycol) copolymer, polyethylene 2,5-furandicarboxylate, poly(propylene 2,5-furandicarboxylate), poly(2,5-furandicarboxylate), poly(hexane 2,5-furandicarboxylate), or a combination thereof; preferably, it may include: polybutylene terephthalate, poly(2,5-furandicarboxylate), or a combination thereof. The soft segment of the thermoplastic polyester elastomer forming the bubble layer may include: polyethylene glycol, polybutylene glycol, polycaprolactone, polymethyl glycol, fatty acid dimer glycol, polytetramethylene ether, ethylene oxide-propylene oxide copolymer bisphenol A ether, polypropylene glycol, polylactide, polyglycolide; preferably, it may include: polyethylene glycol, polycaprolactone, polytetramethylene ether.

[0068] The ratio of soft segments to hard segments and the molecular weight of the thermoplastic copolyester elastomer forming the blister layer can be within suitable ranges to impart good blister properties. The molar ratio of the hard segments to the total blister elastomer can range from 30% to 60%, and the molar ratio of the soft segments to the total blister elastomer can range from 40% to 70%. The molecular weight of the thermoplastic copolyester elastomer can range from 30,000 to 45,000.

[0069] In response to the needs of different application scenarios, the present invention rationally designs the foam layer according to the foam layer material, so that the thickness, density and material are better matched, thereby achieving better performance while meeting automotive regulations.

[0070] The recyclable skin of the present invention may include a first foam layer. The thickness and density of the first foam layer can adjust the user's feeling of use. The thickness of the first foam layer may be 0.1-1mm, preferably 0.3-0.8mm, and more preferably 0.3-0.5mm. If the thickness of the first foam layer is too high, it may cause the overall thickness of the skin to be too high, affecting the coverage of the edge, and prone to appearance problems such as wrinkles. At the same time, if the thickness of the foam layer is too high, the material used in the foaming layer will be increased, which will increase the overall weight of the surface layer and fail to meet the lightweight requirements; if the thickness of the first foam layer is too low, the soft touch of the surface layer will not be obvious enough, and the user's perception of comfort and softness will be reduced. The density of the first foam layer can be 100-300kg / m 3 , preferably 150-200kg / m 3If the density of the first foam layer is too high, the foam layer may become hard, the soft touch feeling may not be obvious, and the foam layer may be too heavy, not meeting the lightweight requirements. If the density of the first foam layer is too low, the foam layer may lack support during long-term use and easily collapse. The first foam layer of the present invention can increase the soft touch feeling when the user first touches the multi-layer material, enhance the softness felt by the user when stroking it, provide the user with a good user experience, and enrich the product application scenarios.

[0071] Figure 2 shows an embodiment of a recyclable skin. This recyclable skin comprises a coating 1, a surface layer 2, and a first blister layer 3, with the first blister layer 3 and the coating 1 located on either side of the surface layer 2. The first blister layer 3 in this recyclable skin provides users with a better surface feel, a softer, more comfortable user experience, and can be used to cover automotive interior components such as door panels, instrument panels, and center consoles.

[0072] The recycled surface can also include a secondary foam layer. This layer enhances the soft touch felt by the user. Recycled surfaces containing this secondary foam layer are particularly suitable for areas in vehicles where softness is a critical requirement, such as seat cushions and backrests, where they can increase the softness and enhance passenger comfort.

[0073] The second bubble layer may be a thermoplastic polyester elastomer foam with a sheet structure, so that the cell structure of the second bubble layer may be looser than that of the first bubble layer, thereby giving the product a softer feel.

[0074] In order to increase the softness of the product, the second bubble layer has a relatively higher thickness and lower density than the first bubble layer. The thickness of the second bubble layer can be 1-10 mm, preferably 3-6 mm. The density of the second bubble layer can be 50-150 kg / m 3 , preferably 70-100kg / m 3 .

[0075] Figure 5 shows an embodiment of a recyclable skin. This recyclable skin comprises a coating 1, a surface layer 2, and a second blister layer 5. The first blister layer 5 and the coating 1 are located on either side of the surface layer 2. The presence of the second blister layer 3 in this recyclable skin enhances the product's soft touch. It is particularly suitable for covering automotive interior components, such as seats and armrests.

[0076] fabric layer

[0077] The recyclable skin may further comprise a fabric layer, which serves to increase the overall strength of the recyclable skin and reduce its ductility.

[0078] The fabric layer can be made of fibers made of the same polymer material (i.e., polyester) as the surface layer and foam layer, thereby facilitating the overall recycling of the recyclable surface layer after its service life expires. The fibers made of thermoplastic polyester material can be thermoplastic polyester fibers, thermoplastic polyester elastomer fibers, or a combination thereof.

[0079] Available thermoplastic polyester fibers include polybutylene terephthalate fibers, polyethylene terephthalate fibers, polytrimethylene terephthalate fibers, or combinations thereof. The fabric layer formed from polybutylene terephthalate fibers has better properties (eg, wear resistance, strength, and tensile strength).

[0080] The fabric layer can also be made from thermoplastic polyester elastomer fibers, wherein the thermoplastic polyester elastomer comprises hard segments and soft segments. Among them, the hard segment can include: polybutylene terephthalate, polyethylene terephthalate, polypropylene terephthalate, poly(1,4-dimethylene cyclohexane terephthalate), poly(2,6-butylene naphthalate), poly(xylene terephthalate), polyethylene terephthalate / polybutylene terephthalate copolymer, poly(dimethyl terephthalate / isophthalate / 1,4-butanediol) copolymer, polyethylene 2,5-furandicarboxylate, poly(propylene 2,5-furandicarboxylate), poly(2,5-furandicarboxylate), poly(hexane 2,5-furandicarboxylate) or a combination thereof, preferably includes: polybutylene terephthalate, poly(2,5-furandicarboxylate) or a combination thereof. The soft segment may include polyethylene glycol, polybutylene glycol, polycaprolactone, polymethyl glycol, fatty acid dimer glycol, polytetramethylene ether, ethylene oxide-propylene oxide copolymer bisphenol A ether, polypropylene glycol, polylactide, polyglycolide, preferably polyethylene glycol, polycaprolactone, polytetramethylene ether.

[0081] The fabric layer can be in the form of a woven fabric or a non-woven fabric. The fabric layer can be a polyester fiber cloth, preferably including a thermoplastic polyester elastomer fiber cloth and / or a polybutylene terephthalate fiber cloth. The fabric layer can impart good properties to the recyclable skin.

[0082] The fabric layer of the present invention has a suitable thickness, fabric density and tensile strength, so that the tensile properties and strength of the recyclable skin can be further improved while meeting the requirements of vehicle regulations.

[0083] The thickness of the fabric layer can be 0.1-1mm, preferably 0.3-0.8mm, and more preferably 0.3-0.5mm. If the fabric layer is too thick, the product may be too hard, affecting the softness and feel of the surface product. If the surface needs to be light-transmitting, the thickness of the fabric layer may be too high. If the fabric layer is too thin, the material strength may be insufficient, and the surface material may be easily torn during stretching and covering, and the surface material may be easily broken or torn during sewing.

[0084] The fabric surface density of the fabric layer can be 15-150g / m 2 If the fabric surface density of the fabric layer is too high, the fabric layer may be too dense, the hardness will increase, the hand feel will be affected, and the weight will increase, which will not meet the lightweight requirements. If it is too dense, the light transmittance requirements cannot be met. If the fabric surface density is too low, the fabric layer will be insufficient in strength, easy to stretch, and the orientation will be difficult to control.

[0085] The fabric layer has a suitable material, thickness, and surface density, so that it has a high tensile strength, thereby improving product performance. The tensile strength of the fabric layer of the present invention can be above 100N.

[0086] Depending on the application scenario, the skin of the present invention may include one or more fabric layers, and better product performance can be obtained by matching with other layers.

[0087] Figure 3 shows an embodiment of a recyclable skin. This recyclable skin comprises a coating 1, a surface layer 2, and a fabric layer 4, with the fabric layer 4 and coating 1 positioned on either side of the surface layer 2. The presence of the fabric layer 4 in this recyclable skin enhances the product's tensile strength and tensile properties. It can be used to cover automotive interior components such as door panels, instrument panels, and center consoles.

[0088] In the recyclable skin of the present invention, the fabric layer and the foam layer can be used in combination, so that the product has increased tensile properties and strength while maintaining the soft touch of the surface.

[0089] The recyclable skin of the present invention may comprise a surface layer, a coating layer, a foam layer, and a fabric layer, wherein the foam layer and the fabric layer are both located on the side of the surface layer facing away from the coating layer. The foam layer may be located between the surface layer and the fabric layer. This type of recyclable skin is particularly suitable for use in automotive seats (e.g., backrests and seat cushions).

[0090] Figure 4 shows an embodiment of a recyclable skin. The recyclable skin comprises a coating 1, a surface layer 2, a first bubble layer 3, and a fabric layer 4. Both the first bubble layer 3 and the fabric layer 4 are located on the side of the surface layer facing away from the coating, with the first bubble layer 3 positioned between the surface layer 2 and the fabric layer 4. This recyclable skin is suitable for covering automotive interior components, such as door panels, instrument panels, and center consoles.

[0091] Figure 6 shows an embodiment of a recyclable skin. The recyclable skin comprises a coating 1, a surface layer 2, a second bubble layer 5, and a fabric layer 4. The second bubble layer 5 and fabric layer 4 are both located on the side of the surface layer facing away from the coating. The second bubble layer 5 is located between the surface layer 2 and the fabric layer 4. This recyclable skin is suitable for covering automotive interior components, such as armrests and seats.

[0092] Figure 7 shows an embodiment of a recyclable skin. The recyclable skin comprises a coating 1, a surface layer 2, a second bubble layer 5, and a fabric layer 4. The second bubble layer 5 and the fabric layer 4 are both located on the side of the surface layer facing away from the coating, and the fabric layer 4 is located between the surface layer 2 and the second bubble layer 5. In the use scenario of the recyclable skin, generally speaking, the area that the user contacts or observes is the surface layer coated with the coating. Because the fabric layer 4 is adjacent to the surface layer 2, the user contact area can be made stiffer and flatter, with a better visual effect. The recyclable skin is suitable for covering automotive interior parts, such as armrests, seats, etc.

[0093] The recyclable skin may include: a surface layer, a coating layer, a first foam layer, a second foam layer, and a fabric layer. The first foam layer, the second foam layer, and the fabric layer are all located on the side of the surface layer facing away from the coating layer. The first foam layer may be located between the surface layer and the fabric layer. The fabric layer may be located between the surface layer and the second foam layer.

[0094] Figure 8 shows an embodiment of a recyclable skin. This recyclable skin comprises, in order, a coating 1, a surface layer 2, a first blister layer 3, a fabric layer 4, and a second blister layer 5. The presence of the first blister layer 3 and the second blister layer 5 makes the recyclable skin softer to the touch, further enhancing its comfort. This recyclable skin is suitable for covering automotive interior components such as armrests and seats.

[0095] Figure 9 shows an embodiment of a recyclable skin. This recyclable skin comprises, in order, a coating 1, a surface layer 2, a fabric layer 4, a second foam layer 5, and finally, the fabric layer 4. The fabric layer 4 is positioned adjacent to the surface layer 2 and the second foam layer. This arrangement provides a stiffer and flatter user contact area while increasing the product's overall tensile strength and wear resistance. This recyclable skin is suitable for covering automotive interior components, such as armrests and seats.

[0096] Figure 10 shows an embodiment of a recyclable skin. This recyclable skin sequentially comprises a coating 1, a surface layer 2, a first foam layer 3, a fabric layer 4, a second foam layer 5, and a fabric layer 4. This recyclable skin is soft and comfortable to the touch, and exhibits excellent tensile strength and abrasion resistance. This recyclable skin is suitable for covering automotive interior components, such as armrests and seats.

[0097] Based on considerations for overall recycling, each layer of the recyclable skin of the present invention is made of polyester to facilitate overall recycling. In one embodiment, the content of thermoplastic polyester material in the recyclable skin is greater than 70%, preferably greater than 85%, and more preferably greater than 90%, based on the total weight of the recyclable skin. In another embodiment, the content of thermoplastic polyester elastomer in the recyclable skin is greater than 60%, preferably greater than 85%, and more preferably greater than 90%, based on the total weight of the recyclable skin. If the content of thermoplastic polyester or thermoplastic polyester elastomer in the skin is too low, the purpose of overall recycling cannot be achieved.

[0098] The material of each layer can be made of the same or different specific polyester types. To improve the recycling efficiency of the recyclable skin, the material of each layer of the recyclable skin can be made of the same or similar polyester types as much as possible. After the product's service life expires, the recyclable skin can be directly recycled as a whole without disassembly, and the composition of the recycled material obtained after recycling is relatively uniform. In one embodiment, the hard segments in the thermoplastic polyester elastomer foam that constitutes the bubble layer (first and / or second bubble layer) are of the same type as the hard segments of the thermoplastic copolyester elastomer that constitutes the surface layer. That is, the thermoplastic polyester elastomer that forms the bubble layer through foaming and the hard segments of the thermoplastic copolyester elastomer that forms the surface layer have the same repeating unit structure. In one embodiment, the soft segments in the thermoplastic polyester elastomer foam that constitutes the bubble layer (first and / or second bubble layer) are of the same type as the soft segments of the thermoplastic copolyester elastomer that constitutes the surface layer. That is, the thermoplastic copolyester elastomer that forms the bubble layer through foaming and the soft segments of the thermoplastic polyester elastomer that forms the surface layer have the same repeating unit structure.

[0099] In one embodiment, the hard segment of the thermoplastic copolyester elastomer constituting the surface layer is polybutylene terephthalate or polybutylene-2,5-furandicarboxylate. The soft segment of the thermoplastic polyester elastomer constituting the surface layer is polytetramethylene or polycaprolactone. The hard segment of the thermoplastic polyester elastomer foam (the material of the first and / or second foam layers) is polybutylene terephthalate or polyethylene terephthalate, preferably polybutylene terephthalate. The soft segment of the thermoplastic polyester elastomer foam is a polyester segment or a polyether segment. The fabric layer is polybutylene terephthalate fiber cloth.

[0100] Polybutylene terephthalate (PBTE) materials are available in a variety of forms and can be used as the material for each layer of the recyclable skin. Specifically, thermoplastic polyester elastomers with a PBTE hard segment exhibit excellent mechanical strength, elasticity, and corrosion resistance. Through calendaring or casting, these thermoplastic polyester elastomers can be fabricated into a surface layer that meets automotive regulations and exhibits excellent performance. Foams formed by foaming thermoplastic polyester elastomers containing PBTE hard segments exhibit excellent resilience and suitable hardness. Fiber cloths formed from PBTE fibers exhibit excellent wear resistance, strength, and tensile strength. Therefore, selecting PBTE as the material for each layer can reduce the number of polyester types incorporated into the recyclable skin, thereby improving reuse efficiency and reducing the operational complexity of recycling (e.g., physical or chemical recycling). This also ensures that the recyclable skin exhibits excellent performance characteristics, such as strength, tensile strength, and elasticity, meeting the requirements for use in vehicle interior components.

[0101] Compared with other conventional recyclable surface products made from a single type of material, the products of this application all have disadvantages in certain aspects, such as:

[0102] While polyolefin materials meet automotive regulations, their hardness cannot reach below 75A. This makes them unsuitable for products requiring a soft surface. Furthermore, the inventors discovered that a foam layer made of polyolefin materials cannot achieve the resilience of the foam layer of the present invention. Furthermore, a fabric layer made of polyolefin materials also exhibits lower tensile strength than the fabric layer of the present invention, thus failing to meet high-end automotive regulations.

[0103] For thermoplastic polyurethane elastomer materials, conventional aromatic polyurethane elastomers are prone to yellowing under light conditions. If used for light-colored interiors, they cannot meet automotive-grade requirements. Aliphatic polyurethane elastomers are often relatively expensive and do not meet low-cost requirements. In addition, aliphatic polyurethane elastomers are difficult to achieve low hardness and cannot meet the requirements of soft surfaces.

[0104] Thermoplastic polystyrene elastomers (SBS elastomers) contain diene bonds in their structure, which makes them susceptible to aging and have poor heat resistance, making them difficult to meet automotive-grade requirements. However, the hard segment of the thermoplastic polyester elastomer used in this application has a high melting point and polarity, resulting in superior heat and oil resistance to SBS elastomers.

[0105] For thermoplastic vulcanized rubber elastomers, there are sulfur bonds in their structure, and the odor cannot meet automotive grade requirements at high temperatures, so they do not have an advantage.

[0106] Thermoplastic polyamide elastomers have similar performance to thermoplastic polyester elastomers, but their prices are relatively high, which is not conducive to market applications.

[0107] Contains recycled skin vehicle interior components

[0108] The recyclable skin of the present invention has a wide range of applications, including as a cladding material for interior automotive components, such as dashboards, door panels, center consoles, armrests, and seats. The coating of the recyclable skin is located on the user-friendly side of the surface, meaning that the user can touch or see the coated surface.

[0109] In one embodiment, the car seat comprises the recyclable surface skin of the present invention. Figure 11 shows an embodiment of the soft finishing layer of the car seat. The recyclable surface skin comprising the coating 1, the surface layer 2, the first bubble layer 3, the fabric layer 4, and the second bubble layer 5 is wrapped together with the seat cushion (or backrest) 7 to form the soft finishing layer of the car seat. The wrapping of the recyclable surface skin and the seat cushion or backrest 7 can be carried out by sewing. The suture can be made of polyester fiber suture, such as polybutylene terephthalate fiber suture. After the surface layer and the seat cushion (or backrest) are combined together by wrapping, they can be combined with the skeleton by means of a profile clip, and the profile used for the clip can be a thermoplastic polyester elastomer molded by injection molding or extrusion. After the service life of the product expires, the skeleton and the soft finishing layer can be separated, and the soft finishing layer (which includes the recyclable surface skin and the seat cushion (or backrest)) can be recycled as a whole.

[0110] In one embodiment, an automotive interior component includes the recyclable surface layer of the present invention. Figure 13 illustrates an embodiment of a soft surface layer for an automotive interior component. The soft surface layer comprises a coating 1, a surface layer 2, and a fabric layer 4. The soft surface layer can be bonded to a frame using thermoplastic polyester adhesive. After the product's service life expires, the frame and soft surface layer can be separated, and the entire soft surface layer (i.e., the recyclable surface layer) can be recycled and reused.

[0111] The recycling of the soft decorative layer can be carried out by physical recycling or chemical recycling. A feasible route for physical recycling is as follows: after the soft decorative layer containing the recyclable skin of the present invention is disassembled from the internal components of the vehicle, it is directly physically crushed as a whole without layering and splitting to recover the powder. The powder can then be extruded and granulated through a twin-screw extruder to obtain recycled thermoplastic polyester particles. The recycled particles can be used to prepare recyclable skins or applied to other polyester-related fields. A feasible route for chemical recycling is as follows: after the soft decorative layer containing the recyclable skin of the present invention is disassembled, the corresponding monomers can be obtained through alkali dissolution and fractionation, and the monomers are polymerized to obtain the corresponding polymer material. Beneficial effects

[0112] The recyclable skin of the present invention has a multi-layer structure. By rationally designing the structure of each layer (such as the material, hardness, thickness, relative position, etc. of each layer), it is endowed with excellent performance, making it environmentally friendly and applicable in a wide range of scenarios. The present invention can meet the needs of different usage scenarios through the recyclable skin. The present invention creatively selects the same material for each layer of the recyclable skin, facilitating the overall recycling after the lifespan expires.

[0113] Example

[0114] The solution of the present invention is further described in detail below with reference to specific embodiments.

[0115] It should be noted that the following embodiments are merely examples for the purpose of clearly illustrating the technical solutions of the present invention and are not intended to limit the present invention. Those skilled in the art will appreciate that other variations or modifications may be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Obvious variations or modifications derived therefrom remain within the scope of protection of the present invention.

[0116] Example 1

[0117] The structure of the soft trim layer of the car seat of Example 1 is shown in FIG11 . It comprises:

[0118] Coating 1, formed from a waterborne polyurethane coating system (which includes water, a waterborne polyurethane matting resin, and a carbodiimide curing agent), with a coating thickness of 20 μm;

[0119] Surface layer 2 is thermoplastic copolyester elastomer A, whose hard segment is polybutylene terephthalate and soft segment is polytetramethylene ether. The molar ratio of the hard segment to the thermoplastic copolyester elastomer A is 30%, and the molar ratio of the soft segment to the thermoplastic copolyester elastomer A is 70%. The molecular weight range is 33000-35000. The surface layer thickness is 0.3mm, the hardness is 20D, and the surface density is 1000kg / m 3 ;

[0120] The first foam layer 3 is a thermoplastic polyester elastomer foam, wherein the hard segment is polybutylene terephthalate and the soft segment is polyethylene glycol. The molar ratio of the hard segment to the thermoplastic copolyester elastomer is 35%, and the molar ratio of the soft segment to the thermoplastic copolyester elastomer is 65%. The molecular weight range is 30,000-45,000. The foam layer thickness is 0.5 mm and the foam layer density is 100 kg / m 3 ;

[0121] Fabric layer 4, which is polybutylene terephthalate fiber cloth, with a thickness of 0.3mm and a fabric surface density of 15g / m 2 ;

[0122] The second foam layer 5 is a thermoplastic polyester elastomer foam, wherein the hard segment is polyethylene terephthalate and the soft segment is polyethylene glycol. The molar ratio of the hard segment to the thermoplastic copolyester elastomer is 25%, and the molar ratio of the soft segment to the thermoplastic copolyester elastomer is 75%. The molecular weight range is 30,000 to 40,000. The foam layer thickness is 3 mm and the foam layer density is 50 kg / m 3 ;

[0123] Fabric layer 4, which is polybutylene terephthalate fiber cloth, with a thickness of 0.8 mm and a fabric surface density of 100 g / m 2 ;and

[0124] The seat cushion 7 (or backrest 7) ​​is a thermoplastic polyester elastomer foam.

[0125] Comparative Example 1

[0126] The structure of the automotive seat soft trim of Comparative Example 1 is shown in Figure 12. It comprises, in order: a conventional coating 1', a conventional PVC / PU surface layer 2', a conventional PU foam layer 3', a conventional PET fabric layer 4', a conventional PUR foam layer 5', a conventional PET fabric layer 6', and a conventional PUR foam seat cushion 7' ​​(or backrest 7').

[0127] Example 2

[0128] The structure of the soft decorative layer of the automotive interior decoration part of Example 2 is shown in FIG13. It comprises:

[0129] Coating 1, formed from a water-based polyacrylic acid coating system (which includes water, water-based acrylic resin, modified curing agent, leveling agent, etc.), with a coating thickness of 30 μm;

[0130] The surface layer 2 is a thermoplastic copolyester elastomer B, whose hard segment is polybutylene 2,5-furandicarboxylate and the soft segment is polycaprolactone. The molar ratio of the hard segment to the thermoplastic copolyester elastomer B is 40%, and the molar ratio of the soft segment to the thermoplastic copolyester elastomer B is 60%. The molecular weight range is 25000-35000. The surface layer thickness is 0.5mm, the hardness is 40D, and the surface density is 1100kg / m 3 ;and

[0131] Fabric layer 4, which is polybutylene terephthalate fiber cloth, with a thickness of 1mm and a fabric surface density of 70g / m 2 .

[0132] Comparative Example 2

[0133] The structure of the soft finishing layer of the automotive interior component of Comparative Example 2 is shown in FIG14 , which sequentially comprises: a conventional coating layer 1 ′, a conventional PVC / PU surface layer 2 ′, and a conventional PET fabric layer 4 ′.

[0134] Table 1 below shows relevant comparative data of Examples and Comparative Examples.

[0135] Table 1

[0136] As can be seen from Table 1, the recyclable skin of the present invention has a wide range of application scenarios and can be used for soft finishing layers of vehicle seats or interior trims, and can meet the usage requirements of different application scenarios.

[0137] Examples 1 and 2 do not contain non-recyclable materials, and all layers are made of uniform materials. After their service life expires, the layers do not need to be disassembled; they can be recycled as a whole, resulting in convenient recycling and high efficiency. Comparative Examples 1 and 2 contain non-recyclable materials. Therefore, if these materials are to be recycled, they must first be separated into layers and then the recyclable components are recycled. This separation process is complex and requires additional recycling steps, resulting in lower recycling efficiency.

[0138] performance

[0139] The recyclable skins of Examples 1 and 2 of the present application were tested according to the following method, and the results are shown in Table 2:

[0140] Breaking strength: Test standards and methods refer to ISO 13934;

[0141] Tear strength: test standards and methods refer to ISO 13937;

[0142] Thermal aging: Test instrument: Environmental chamber, Test method: Store the product in a 120°C environment for 168 hours and then observe and evaluate;

[0143] Color fastness to rubbing: Test standards and methods refer to ISO 11640;

[0144] Flame retardant: Test standards and methods refer to GB 8410.

[0145] As can be seen from Table 2 below, the recyclable skin of the present invention has excellent performance and can meet the requirements for automotive use.

[0146] Table 2

[0147] Compared with the skin made of other thermoplastic elastomer materials, the skin made of thermoplastic copolyester elastomer in this application has better overall performance. As shown in Table 3 below:

[0148] Table 3

[0149] Minimum achievable hardness a : Refers to the minimum hardness that the product can achieve under the premise of meeting the requirements of vehicle regulations

[0150] It will be apparent to those skilled in the art that many modifications and variations of the present invention may be made without departing from its spirit and scope. The specific embodiments described herein are provided by way of example only and are not intended to be limiting in any way. The true scope and spirit of the present invention are shown by the appended claims, and the description and examples are merely exemplary.

Claims

1. A recyclable skin for a vehicle interior, comprising a surface layer; The surface layer is formed by a material comprising a thermoplastic copolyester elastomer through a calendaring and / or casting process, wherein: The thermoplastic copolyester elastomer forming the surface layer comprises a hard segment and a soft segment, The hard segment of the thermoplastic copolyester elastomer forming the surface layer includes: polybutylene terephthalate, polyethylene terephthalate, polypropylene terephthalate, poly-1,4-dimethylene cyclohexane terephthalate, poly-2,6-butylene naphthalate, poly-xylene terephthalate, polyethylene terephthalate / polybutylene terephthalate copolymer, poly-dimethyl terephthalate / isophthalate / 1,4-butanediol copolymer, poly-2,5-furandicarboxylic acid ethylene glycol, poly-2,5-furandicarboxylic acid propylene glycol, poly-2,5-furandicarboxylic acid butylene glycol, poly-2,5-furandicarboxylic acid hexanediol or a combination thereof; preferably includes: polybutylene terephthalate, poly-2,5-furandicarboxylic acid butylene glycol or a combination thereof; The soft segment of the thermoplastic copolyester elastomer forming the surface layer includes: polyethylene glycol, polybutylene glycol, polycaprolactone, polymethyl glycol, fatty acid dimer glycol, polytetramethylene ether, ethylene oxide-propylene oxide copolymer bisphenol A ether, polypropylene glycol, polylactide, polyglycolide or a combination thereof; preferably includes: polyethylene glycol, polycaprolactone, polytetramethylene ether or a combination thereof.

2. The recyclable skin according to claim 1, wherein: The thickness of the surface layer is 0.1-1.5 mm, preferably 0.3-1 mm; more preferably 0.5-0.8 mm; and / or The hardness of the surface layer is 20-60D; and / or The density of the surface layer is 1000-1200 kg / m 3 .

3. The recyclable skin according to claim 1, wherein: In the thermoplastic copolyester elastomer forming the surface layer, the molar ratio of the hard segment to the thermoplastic copolyester elastomer is 25%-60%, preferably 30%-40%; and / or In the thermoplastic copolyester elastomer forming the surface layer, the molar ratio of the soft segment to the thermoplastic copolyester elastomer is 40%-75%, preferably 60%-70%.

4. The recyclable skin of claim 1, wherein: The surface of the surface layer has a coating formed by a water-based polyurethane system and / or an acrylic system. in, The weight of the coating is 0.05% to 0.2% of the total weight of the recyclable skin; and / or The thickness of the coating is 2-50 μm, preferably 10-30 μm, and more preferably 10-20 μm.

5. The recyclable skin of claim 1, wherein: The recyclable skin further comprises a bubble layer; The foam layer is formed of a material including a thermoplastic polyester elastomer through a foaming process.

6. The recyclable skin according to claim 5, wherein: The bubble layer includes: a first bubble layer and / or a second bubble layer; in, The thickness of the first bubble layer is 0.1-1 mm, preferably 0.3-0.8 mm, more preferably 0.3-0.5 mm; and / or The density of the first foam layer is 100-300 kg / m 3 , preferably 150-200kg / m 3 ; and / or The thickness of the second bubble layer is 1-10 mm, preferably 3-6 mm; and / or The density of the second foam layer is 50-150 kg / m 3 , preferably 70-100kg / m 3 .

7. The recyclable skin according to any one of claims 1 to 6, wherein: The recyclable skin further comprises a fabric layer; The fabric layer is made of fibers formed from thermoplastic polyester material. Wherein, the fibers formed of thermoplastic polyester material include: thermoplastic polyester fibers, thermoplastic polyester elastomer fibers or a combination thereof.

8. The recyclable skin according to claim 7, wherein: The fabric layer includes: polybutylene terephthalate fiber cloth, thermoplastic copolyester elastomer fiber cloth or a combination thereof.

9. The recyclable skin of claim 7, wherein: The thickness of the fabric layer is 0.1-1 mm, preferably 0.3-0.8 mm, more preferably 0.3-0.5 mm; and / or The fabric surface density of the fabric layer is 15-150 g / m 2 ; and / or The tensile strength of the fabric layer is above 100N.

10. The recyclable skin according to any one of claims 1 to 6, wherein: Based on the total weight of the recyclable skin, the content of thermoplastic polyester material in the recyclable skin is more than 70%, preferably more than 85%; and / or Based on the total weight of the recyclable skin, the content of the thermoplastic polyester elastomer in the recyclable skin is above 60%, preferably above 85%.

11. The recyclable skin of claim 7, wherein: Based on the total weight of the recyclable skin, the content of thermoplastic polyester material in the recyclable skin is more than 70%, preferably more than 85%; and / or Based on the total weight of the recyclable skin, the content of the thermoplastic polyester elastomer in the recyclable skin is above 60%, preferably above 85%.

12. The recyclable skin of claim 7, wherein: The recyclable skin comprises: the surface layer, the fabric layer and the first bubble layer; the fabric layer and the first bubble layer are located on the same side of the surface layer; Wherein, the first foam layer is located between the surface layer and the fabric layer.

13. The recyclable skin of claim 7, wherein: The recyclable skin comprises: the surface layer, the fabric layer and the second bubble layer; the fabric layer and the second bubble layer are located on the same side of the surface layer; Wherein, the second foam layer is located between the surface layer and the fabric layer.

14. The recyclable skin of claim 7, wherein: The recyclable skin comprises: the surface layer, the fabric layer and the second bubble layer; the fabric layer and the second bubble layer are located on the same side of the surface layer; Wherein, the fabric layer is located between the surface layer and the second bubble layer.

15. The recyclable skin of claim 7, wherein: The recyclable skin comprises: the surface layer, the fabric layer, the first bubble layer and the second bubble layer; the fabric layer, the first bubble layer and the second bubble layer are located on the same side of the surface layer; in, The first bubble layer is located between the surface layer and the fabric layer, and The fabric layer is located between the surface layer and the second bubble layer.

16. The recyclable skin according to claim 14 or 15, wherein: The recyclable skin further comprises the fabric layer on a side of the second bubble layer facing away from the surface layer.

17. A vehicle interior component comprising the recyclable skin for vehicle interior according to any one of claims 1 to 16, Preferably, the vehicle interior component comprises: Dashboard, door panels, center console, armrests or seats.

Images