Imitation leather decorative member and preparation method therefor, and cosmetic container

Abstract

The present application relates to an imitation leather decorative member and a preparation method therefor, and a cosmetic container. The imitation leather decorative member is arranged on the surface of a cosmetic container, the raw material components of the imitation leather decorative member including thermoplastic polyurethane elastomer. The decorative member of the present application has an appearance and texture similar to leather, and, when attached to the surface of the cosmetic container, provides protection for the container, and also gives people the visual effect of leather, thereby enhancing the class of a product.

Description

Imitation leather decorative piece, preparation method thereof and cosmetic container Technical Field

[0001] The present application relates to cosmetic packaging technology, and in particular to an imitation leather decorative part, a preparation method thereof, and a cosmetic container. Background Art

[0002] Cosmetics, as daily consumables, are widely used. With the development of society and the continuous improvement of people's aesthetic standards, the pursuit of fashion and novelty has become a constant topic. People's requirements for cosmetic containers have also shifted from traditional economical practicality to high-end fashion. Therefore, to meet this consumer demand, cosmetic containers are often attached with imitation leather patches. However, current imitation leather patches are made by pressing multiple layers of materials, which is not only costly and unsuitable for mass production, but also easily fall off between the layers, affecting the visual effect.

[0003] Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present application provides an imitation leather decorative part, which has a leather-like appearance and leather-like touch. It is attached to the surface of the cosmetic container, which not only protects the container, but also gives people a leather-like visual sense, thereby improving the grade of the product.

[0005] The technical solution adopted by this application to solve its technical problems is:

[0006] The invention discloses an imitation leather decorative piece, which is arranged on the surface of a cosmetic container. The raw material components of the imitation leather decorative piece include thermoplastic polyurethane elastomer.

[0007] Optionally, the imitation leather decorative piece comprises the following raw material components in parts by weight: 84-99.5 parts of thermoplastic polyurethane elastomer, 0.05-0.5 parts of antioxidant and 0.05-0.5 parts of lubricant.

[0008] Optionally, the thermoplastic polyurethane elastomer comprises the following raw material components in parts by weight: 60-80 parts of polyol, 16-31 parts of isocyanate and 3.5-9 parts of chain extender.

[0009] Optionally, the Shore hardness of the thermoplastic polyurethane elastomer is 63-69A.

[0010] Optionally, the thermoplastic polyurethane elastomer has a 100% elastic modulus ≥ 2 MPa and a 300% elastic modulus ≥ 4 MPa.

[0011] Optionally, the elongation at break of the thermoplastic polyurethane elastomer is ≥400%.

[0012] Optionally, the tensile strength of the thermoplastic polyurethane elastomer is ≥10 MPa.

[0013] Optionally, the density of the thermoplastic polyurethane elastomer is 1.0-1.4 g / cm 3 .

[0014] Optionally, the tear strength of the thermoplastic polyurethane elastomer is ≥40 kN / m.

[0015] Optionally, the thermoplastic polyurethane elastomer has a glass transition temperature of -45°C to -40°C.

[0016] Optionally, the raw material components further include a masterbatch, and the weight portion of the masterbatch is 0.3-10 parts.

[0017] Optionally, the raw material components further include polyolefin, and the weight portion of the polyolefin is 1-15 parts.

[0018] Optionally, the polyolefin includes at least one of polypropylene, polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer and methyl methacrylate.

[0019] Optionally, the raw material components further include an anti-tackifier, and the weight portion of the anti-tackifier is 0.1-0.5 parts.

[0020] Optionally, the raw material components further include 8 parts by weight of polyethylene.

[0021] Optionally, the raw material components further include 10 parts by weight of polyethylene.

[0022] Optionally, the raw material components further include 10 parts by weight of polyethylene and 5 parts by weight of all-purpose black masterbatch.

[0023] Optionally, the raw material components further include 5 parts by weight of polyolefin elastomer and 5 parts by weight of polyethylene.

[0024] The present application also provides a cosmetic container, comprising the imitation leather decorative piece, wherein the imitation leather decorative piece is attached to an assembly surface of the cosmetic container, and the assembly surface comprises a flat surface or a curved surface.

[0025] Optionally, the decorative element is assembled to the assembly surface of the cosmetic container by bonding, clamping or hot pressing.

[0026] Optionally, the decorative element includes a decorative element body, the decorative element body includes a decorative portion, and the decorative portion includes at least one of a protrusion, a groove, and a stitching line.

[0027] Optionally, a cavity is provided between the decorative element body and the assembly surface of the cosmetic container.

[0028] Optionally, the cavity is filled with soft filling.

[0029] Optionally, the decorative part body corresponding to the cavity has a convex arc structure, and any two points are taken on the decorative part body corresponding to the cavity. The thicknesses of the decorative part body at the two points are D1 and D2 respectively, and the difference between D1 and D2 is less than the tolerance of the decorative part body.

[0030] The present application also provides a method for preparing the imitation leather decorative piece, comprising the following steps:

[0031] Manufacturing thermoplastic polyurethane elastomer particles: mixing raw materials uniformly and injecting them into a twin-screw extruder for granulation to obtain thermoplastic polyurethane elastomer particles, wherein the raw materials include polyol, isocyanate and chain extender;

[0032] Injection-molded imitation leather decorative parts: thermoplastic polyurethane elastomer particles, antioxidants and lubricants are injected into an injection molding machine, and the imitation leather decorative parts are injection-molded by the injection molding machine.

[0033] Optionally, the process for producing thermoplastic polyurethane elastomer particles comprises the following steps:

[0034] Preparation of materials: weighing raw materials according to the formula, wherein the raw materials include polyol, isocyanate and chain extender;

[0035] Degassing: Degas the raw materials under vacuum environment;

[0036] Mixing: Put the raw materials into a high-speed mixer and stir them evenly to obtain a mixture, and then dry the mixture;

[0037] Granulation: The dried mixture is added into the main feeding hopper of a twin-screw extruder, and is plasticized, extruded, stretched, air-dried, and granulated to obtain thermoplastic polyurethane elastomer granules.

[0038] Optionally, the injection molding process for imitation leather decorative parts includes the following steps:

[0039] Ingredients: weighing materials according to the formula, wherein the materials include thermoplastic polyurethane elastomer particles, antioxidant and lubricant;

[0040] Injection molding machine: injecting the thermoplastic polyurethane elastomer particles into the injection molding machine for hot melting;

[0041] Adding auxiliary materials: adding the antioxidant into the injection molding machine and mixing evenly, then adding the lubricant into the injection molding machine and mixing evenly to obtain a molten mixture;

[0042] Molding: injecting the molten mixture into a mold of an injection molding machine to obtain an imitation leather decorative part.

[0043] Optionally, the material further comprises at least one of polyolefin, masterbatch and anti-adhesive. In the step of injecting into the injection molding machine, at least one of the polyolefin, masterbatch and anti-adhesive is added into the injection molding machine and hot-melted together with the thermoplastic polyurethane elastomer particles.

[0044] The beneficial effects of this application are:

[0045] 1) The decorative part in this application is formed by injection molding of thermoplastic polyurethane elastomer and chemical additives to form a single-layer integrated structure, which reduces the processing cost of the product and is conducive to large-scale industrial production; it is also easy to recycle and energy-saving and environmentally friendly.

[0046] 2) The decorative piece in this application has a leather-like appearance and feel. When attached to the surface of a cosmetic container, it not only protects the container but also gives the user a leather-like visual experience, enhancing the product's quality. Compared to traditional products with a pressed silicone substrate and an imitation leather surface, this decorative piece has high hardness, strong toughness, and is more durable.

[0047] 3) Compared with multi-layer pressed products, the decorative parts in this application will not have the problem of surface peeling, and have good elasticity. The surface of the decorative parts is more delicate and soft, with elasticity close to leather, visual effects, and better feel. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] FIG1 is a schematic diagram of the structure of the imitation leather decorative part in this application;

[0049] FIG2 is a second structural diagram of the imitation leather decorative part in this application;

[0050] FIG3 is a third structural diagram of the imitation leather decorative part in this application;

[0051] FIG4 is a schematic structural diagram of a cosmetic container in this application;

[0052] In the figure: 100 - decorative part body, 110 - first surface, 111 - raised portion, 112 - recessed portion, 113 - decorative portion, 120 - second surface, 200 - cosmetic container. DETAILED DESCRIPTION

[0053] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described in this application are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the following drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0056] The invention discloses an imitation leather decorative piece, which is arranged on the surface of a cosmetic container. The raw material components of the imitation leather decorative piece include thermoplastic polyurethane elastomer.

[0057] Optionally, the imitation leather decorative piece comprises the following raw material components by weight: 84-99.5 parts thermoplastic polyurethane elastomer, 0.05-0.5 parts antioxidant, and 0.05-0.5 parts lubricant. This imitation leather decorative piece is injection molded from thermoplastic polyurethane elastomer (TPU). It has a leather-like appearance and feel. When attached to the surface of a cosmetic container, it not only protects the container but also gives it a leather-like visual effect, enhancing the product's quality. Made of plastic, this decorative piece is more wear-resistant and elastic than leather. Compared to traditional pressed silicone substrates with imitation leather surfaces, this decorative piece offers increased hardness, toughness, and wear resistance, making it more durable.

[0058] Thermoplastic polyurethane elastomers (TPEs) comprise the following raw material components by weight: 60-80 parts polyol, 16-31 parts isocyanate, and 3.5-9 parts chain extender. Alternatively, the components may be 65-80 parts polyol, 20-25 parts isocyanate, and 5-7 parts chain extender. The resulting TPEs possess properties such as hardness, elasticity, and elongation that meet the requirements for leather-like decorative parts.

[0059] Optionally, the polyol includes at least one of polyethylene adipate diol, polybutylene adipate diol, and polyhexylene adipate diol; the isocyanate includes at least one of hexamethylene diisocyanate, isophorone diisocyanate, 4,4-dicyclohexylmethane diisocyanate, cyclohexane-1,4-diisocyanate, and decane-1,10-diisocyanate; and the chain extender is at least one of 1,4-butanediol, ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 2-methyl-1,3-propanediol, and 1,6-hexanediol.

[0060] Optionally, the antioxidant is at least one of hindered phenol, hydroxylamine, thioether and triazine antioxidants; and the lubricant is at least one of erucamide lubricants, oleamide lubricants and stearic acid lubricants.

[0061] Among them, antioxidants inhibit thermal oxidative aging during material production and processing, while lubricants facilitate demolding during injection molding. Hindered phenols include antioxidants 1010, 1024, 1076, 1135, 1098, and 245; phosphites include antioxidants 168, P-EPQ, PEP-36, 626, 9228, and DPDP; thioethers include DSTP, DLTP, and DMTP; and triazines include STA-1, 565, and 3114.

[0062] The Shore hardness of the thermoplastic polyurethane elastomer is 63-69A. Optionally, the Shore hardness of the thermoplastic polyurethane elastomer is 65-69A. Optionally, the Shore hardness of the thermoplastic polyurethane elastomer is 68A. The 100% elastic modulus of the thermoplastic polyurethane elastomer is ≥2MPa, and the 300% elastic modulus is ≥4MPa. The elongation at break of the thermoplastic polyurethane elastomer is ≥400%. The tensile strength of the thermoplastic polyurethane elastomer is ≥10MPa. The density of the thermoplastic polyurethane elastomer is 1.0-1.4g / cm 3 The tear strength of thermoplastic polyurethane elastomer is ≥40kN / m.

[0063] The glass transition temperature (Tg) of the thermoplastic polyurethane elastomer is -45°C to -40°C. The glass transition temperature (Tg) is determined using differential scanning calorimetry at 10°C / min. Optionally, the thermoplastic polyurethane elastomer has the following properties: a 100% elastic modulus of 2-5 MPa; a 300% elastic modulus of 4-8 MPa; an elongation at break of 600-800%; and a density of 1.1-1.25 g / cm 3 ; Tensile strength is 10-20MPa; Tear strength is 60-70KN / m.

[0064] The raw material components also include masterbatches, with the weight of the masterbatches ranging from 0.3 to 10 parts. The raw materials for the masterbatches include polyurethane elastomer, polyolefin, pigment, filler, dispersant, etc. The pigment can be inorganic or organic. The inorganic pigment includes at least one of titanium dioxide, carbon black, and iron blue. The organic pigment includes one of an azo raw material, phthalocyanine pigment, and heterocyclic pigment. Masterbatches made using titanium dioxide as the pigment are white masterbatches, while those made using carbon black as the pigment are black masterbatches. Adding masterbatches not only allows for the production of decorative pieces with different colors but also improves their toughness.

[0065] The raw material components also include polyolefin, and the weight portion of polyolefin is 1-15 parts. Polyolefin is added to the raw materials as a toughening agent. The decorative piece containing polyolefin has good toughness, so the obtained decorative piece has a good feel and is not sticky.

[0066] The polyolefin includes at least one of polypropylene, polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer and methyl methacrylate, wherein polypropylene is PP, polyethylene is PE, polyolefin elastomer is POE, ethylene-vinyl acetate copolymer is EVA, and methyl methacrylate is MMA.

[0067] The raw material components further include an anti-tackifier, and the weight portion of the anti-tackifier is 0.1-0.5 parts. Optionally, the weight portion of the anti-tackifier is 0.3 parts.

[0068] The raw material components also include 8 parts by weight of polyethylene, wherein the polyethylene is LH606 high-density polyethylene.

[0069] The raw material components further include 10 parts by weight of polyethylene, wherein the polyethylene is 5 parts by weight of PE8203 and 5 parts by weight of LH606 high-density polyethylene, or wherein the polyethylene is 10 parts by weight of LH606 high-density polyethylene.

[0070] The raw material components also include 10 parts by weight of polyethylene and 5 parts by weight of all-purpose black masterbatch, wherein the polyethylene is LH606 high-density polyethylene.

[0071] The raw material components also include 5 parts by weight of polyolefin elastomer and 5 parts by weight of polyethylene.

[0072] As shown in Figure 4, a cosmetic container includes an imitation leather decorative piece. The imitation leather decorative piece is attached to the mounting surface of the cosmetic container 200, which can be a flat or curved surface. The mounting surface includes the top surface and / or the surrounding side surfaces. Specifically, the decorative piece can be attached to the top surface of the cosmetic container, the surrounding side surfaces, or both. The top surface of the cosmetic container can be flat or curved, and the surrounding side walls can be curved. In other words, the decorative piece can be attached to any mounting surface of the cosmetic container 200, whether flat or curved.

[0073] The decorative piece is attached to the mounting surface of the cosmetic container 200 by bonding, snapping, or hot pressing. This decorative piece has a leather-like appearance and feel. When attached to the mounting surface of the cosmetic container, it not only protects the container but also gives it a leathery feel, enhancing the product's quality.

[0074] As shown in Figures 1-3, the decorative piece includes a decorative piece body 100, which includes a decorative portion 113. The decorative portion 113 includes at least one of a protrusion, a groove, and a stitching line. The decorative portion 113 is integrally formed with the decorative piece body 100 by injection molding. The imitation leather decorative piece includes the decorative piece body 100, which includes a first surface 110 and a second surface 120 disposed opposite each other. The first surface 110 includes a raised portion 111 and a recessed portion 112 spaced apart from each other. The projection of the recessed portion 112 on the second surface 120 forms a joint, which is used to connect the decorative piece body 100 to the cosmetic container 200. The first surface 110 of the decorative piece body 100 is an exterior surface, and the second surface 120 is an interior surface. The joint is a portion of the second surface 120. Optionally, the joint is a flat surface that is directly attached to the exterior surface of the cosmetic container using glue or tape, thereby protecting and decorating the container through the first surface 110. The first surface 110 is a decorative exterior surface. The shape of the decorative element body 100 can be adjusted to the structure of the cosmetic container, for example, it can be rectangular, square, oval, circular, etc. In addition to the decorative element body, the decorative element may also include other components. For example, the first surface 110 of the decorative element body 100 can be affixed with a protective film to protect the patch substrate, and the second surface 120 can be affixed with an adhesive layer to affix the patch substrate to the surface of the cosmetic container. This decorative element has a leather-like appearance and feel. When attached to the outer surface of a cosmetic container, it not only protects the container but also gives the appearance of leather, enhancing the product's quality. This decorative element is made of plastic, which is more wear-resistant and elastic than leather. Compared to traditional products with a pressed silicone base and imitation leather surface, this decorative element has high hardness, strong toughness, and is more durable.

[0075] A decorative portion 113 is provided on the first surface 110. The decorative portion 113 is recessed toward the second surface 120, or it protrudes from the raised portion 111. The decorative portion 113 shown in FIG4 is an A. In practical applications, the letter A can be made into any image. The decorative portion 113 can be any uppercase or lowercase letter, number, Chinese character, or other special symbol. The symbol is directly formed during the molding process of the decorative part, making it simple and convenient to manufacture. The decorative portion of the decorative part can be selected from either a consumer's favorite decorative portion or a character with a specific meaning, thereby meeting the diverse needs of consumers. In another possible implementation, a corresponding insert can be embedded or glued into the groove formed by the decorative portion 113. In other implementations, the decorative portion 113 can also be designed as a protrusion, protruding from the raised portion 11, that is, the decorative portion is higher than the first surface 110, so that consumers can touch the symbol, and the overall structure of the decorative part is more three-dimensional and more novel.

[0076] A cavity is defined between the decorative element body 100 and the mounting surface of the cosmetic container 200. This cavity allows the portion of the decorative element containing the cavity to deform when pressed, improving the feel. While traditional leather materials deform under pressure through inherent tension, the imitation leather decorative element of this application utilizes the cavity to achieve the same deformation effect and feel as leather. Without a cavity, the material would be relatively rigid, with minimal deformation and a poor feel. Therefore, the material requirements for the decorative element are relatively high.

[0077] The cavity may not be filled with any substance, or alternatively, the cavity may be filled with a soft filler, such as a sponge, foam, cotton, silica gel, or other flexible material.

[0078] The decorative portion 113 divides the cavity into M sub-cavities. The lower surface of the decorative portion 113 is in contact with the mounting surface of the cosmetic container 200, where M ≥ 2 and M is an integer. Specifically, the lower surface of the decorative portion 113 protrudes toward the cosmetic container and is in contact with the mounting surface of the cosmetic container 200 to divide the cavity into two, three, or more sub-cavities.

[0079] The decorative element body 100 at the location corresponding to the cavity has a convex arc-shaped structure. If two arbitrary points on the decorative element body 100 at the location corresponding to the cavity have thicknesses D1 and D2, respectively, then the difference between D1 and D2 is less than the tolerance of the decorative element body. In other words, the decorative element body 100 at the location corresponding to the cavity has a convex arc-shaped structure with a uniform thickness.

[0080] A method for preparing an imitation leather decorative piece comprises the following steps:

[0081] Manufacturing thermoplastic polyurethane elastomer particles: mixing raw materials uniformly and injecting them into a twin-screw extruder for granulation to obtain thermoplastic polyurethane elastomer particles, wherein the raw materials include polyol, isocyanate and chain extender;

[0082] Injection-molded imitation leather decorative parts: thermoplastic polyurethane elastomer particles, antioxidants and lubricants are injected into an injection molding machine, and the imitation leather decorative parts are injection-molded by the injection molding machine.

[0083] The process for producing thermoplastic polyurethane elastomer particles comprises the following steps:

[0084] Prepare materials: weigh raw materials according to the formula, including polyol, isocyanate and chain extender;

[0085] Degassing: Degas the raw materials under vacuum environment;

[0086] Mixing: Put the raw materials into a high-speed mixer and stir them evenly to obtain a mixture, and then dry the mixture;

[0087] Granulation: The dried mixture is added into the main feeding hopper of a twin-screw extruder, and is plasticized, extruded, stretched, air-dried, and granulated to obtain thermoplastic polyurethane elastomer granules.

[0088] The injection molding process of imitation leather decorative parts includes the following steps:

[0089] Ingredients: weighing materials according to the formula, wherein the materials include thermoplastic polyurethane elastomer particles, antioxidant and lubricant;

[0090] Injection molding machine: inject thermoplastic polyurethane elastomer granules into the injection molding machine for hot melting;

[0091] Add auxiliary materials: add the antioxidant into the injection molding machine and mix evenly, then add the lubricant into the injection molding machine and mix evenly to obtain a molten mixture;

[0092] Molding: The molten mixture is injected into the mold of an injection molding machine for injection molding to obtain imitation leather decorative parts. The present application first degasses the raw materials such as polyols, isocyanates and chain extenders, and then mixes and dries the raw materials. The thermoplastic polyurethane elastomer particles are obtained by granulation using a twin-screw extruder. The hardness, elasticity, elongation and other indicators of the plastic polyurethane elastomer obtained by using a specific raw material ratio can meet the needs of imitation leather decorative parts. Finally, the thermoplastic polyurethane elastomer particles obtained by injection molding and chemical additives such as antioxidants and lubricants are used to obtain an integrally molded imitation leather decorative part through injection molding by an injection molding machine. Therefore, the production cost of the decorative part is low, which is conducive to large-scale industrial production, and the wear resistance is good, and it is not easy to wear and tear, and the product can maintain its beauty for a long time.

[0093] The material further comprises at least one of a polyolefin, a masterbatch, and an anti-tackifier. During the injection molding step, at least one of the polyolefin, the masterbatch, and the anti-tackifier is added to the injection molding machine and hot-melted together with the thermoplastic polyurethane elastomer particles. During injection molding, the masterbatch and the polyolefin are injected into the injection molding machine and injection-molded together with the thermoplastic polyurethane elastomer particles to produce a leather decorative piece. This improves the toughness of the leather decorative piece and provides it with a more comfortable, non-sticky feel. During injection molding, either the polyolefin or the masterbatch alone can be added, or both can be added simultaneously to produce leather decorative pieces of different colors.

[0094] In the degassing step, the degassing time is 10-30 minutes, and in the mixing step, the drying conditions of the mixture are: temperature 80-95° C., time 3-4 hours.

[0095] 1. Preparation of Thermoplastic Polyurethane Elastomer and Imitation Leather Decorative Parts of Examples

[0096] Example 1:

[0097] The preparation of thermoplastic polyurethane elastomer particles comprises the following steps:

[0098] Step 1: Prepare materials: weigh raw materials according to the formula, wherein the raw materials include polyol, isocyanate and chain extender, and the mass ratio of polyol:isocyanate:chain extender is 71.8:22:6.2, the polyol is polyethylene adipate glycol diol, the isocyanate is 4,4'-diphenylmethane diisocyanate (MDI), and the chain extender is 1,4-butanediol;

[0099] Degassing: Degas the raw materials under vacuum environment for 15 minutes;

[0100] Mixing: Put the raw materials into a high-speed mixer and stir them evenly to obtain a mixture, and then dry the mixture. The drying conditions are: temperature 90°C, time 3.5h;

[0101] Granulation: The dried mixture is added into the main feeding hopper of a twin-screw extruder, and is plasticized, extruded, stretched, air-dried, and granulated to obtain thermoplastic polyurethane elastomer granules.

[0102] Example 2:

[0103] The preparation of imitation leather decorative parts includes the following steps:

[0104] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0105] Example 3:

[0106] The preparation of imitation leather decorative parts includes the following steps:

[0107] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 5 parts by weight of NA207-66 low-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0108] Example 4:

[0109] The preparation of imitation leather decorative parts includes the following steps:

[0110] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 5 parts by weight of the universal black masterbatch, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was obtained by injection molding using the injection molding machine.

[0111] Example 5:

[0112] The preparation of imitation leather decorative parts includes the following steps:

[0113] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 7 parts by weight of the universal black masterbatch, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was obtained by injection molding using the injection molding machine.

[0114] Example 6:

[0115] The preparation of imitation leather decorative parts includes the following steps:

[0116] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 6 parts by weight of NA207-66 low-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0117] Example 7:

[0118] The preparation of imitation leather decorative parts includes the following steps:

[0119] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 8 parts by weight of LH606 high-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0120] Example 8:

[0121] The preparation of imitation leather decorative parts includes the following steps:

[0122] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 10 parts by weight of LH606 high-density polyethylene, 5 parts by weight of all-purpose black masterbatch, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was obtained by injection molding using the injection molding machine.

[0123] Example 9:

[0124] The preparation of imitation leather decorative parts includes the following steps:

[0125] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 5 parts by weight of PE8203, 5 parts by weight of LH606 high-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0126] Example 10:

[0127] The preparation of imitation leather decorative parts includes the following steps:

[0128] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 7 parts by weight of PE8203, 3 parts by weight of LH606 high-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0129] Example 11:

[0130] The preparation of imitation leather decorative parts includes the following steps:

[0131] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 3 parts by weight of PE8203, 7 parts by weight of LH606 high-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0132] Example 12:

[0133] The preparation of imitation leather decorative parts includes the following steps:

[0134] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 8 parts by weight of PP, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0135] Example 13:

[0136] The preparation of imitation leather decorative parts includes the following steps:

[0137] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 3 parts by weight of PE8203, 5 parts by weight of PP, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0138] Example 14:

[0139] The preparation of imitation leather decorative parts includes the following steps:

[0140] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 10 parts by weight of LH606 high-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0141] Example 15:

[0142] The preparation of imitation leather decorative parts includes the following steps:

[0143] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 5 parts by weight of Queo8203 polyolefin elastomer, 5 parts by weight of LH606 high-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0144] Example 16:

[0145] The preparation of imitation leather decorative parts includes the following steps:

[0146] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 7 parts by weight of Queo8203 polyolefin elastomer, 3 parts by weight of LH606 high-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was injection molded using the injection molding machine.

[0147] Example 17:

[0148] The preparation of imitation leather decorative parts includes the following steps:

[0149] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 3 parts by weight of Queo8203 polyolefin elastomer, 7 parts by weight of LH606 high-density polyethylene, 0.1 parts by weight of antioxidant 1010 and 0.2 parts by weight of lubricant oleic acid amide were injected into an injection molding machine, and the imitation leather decorative part was obtained by injection molding using the injection molding machine.

[0150] Among them, the manufacturer of NA207-66 low-density polyethylene LDPE is Taiwan Polymer Chemical Co., Ltd.;

[0151] The manufacturer of LH606 high-density polyethylene (HDPE) is Taiwan Polymer Chemicals Co., Ltd.

[0152] The manufacturer of PE8203 is Borealis;

[0153] The manufacturer of Queo8203 polyolefin elastomer POE is Borealis;

[0154] The manufacturer of polypropylene PP is Lee Chang Jung Chemical Industries Co., Ltd.

[0155] 2. Detection of the embodiment

[0156] 1. The test data of Example 1 are shown in Table 1 below:

[0157] Table 1:

[0158] 2. Toughness test of Example 2-17, see Table 2 below:

[0159] Table 2:

[0160] No polyolefin or masterbatch was added in Example 2, while polyolefin and / or masterbatch were added in Examples 3-17. The hand feel of Examples 3-17 was improved compared with that of Example 2, and the surface was more delicate, soft, and non-sticky. Among them, the surface of Example 8 was relatively hard, and the surface of Example 10 was relatively soft. The surface hardness of the decorative parts in the remaining examples was moderate, that is, the toughness of Examples 3-17 was improved compared with that of Example 2. Therefore, polyolefin or masterbatch can improve the toughness of the decorative parts.

[0161] It should be noted that those skilled in the art may make a number of modifications and improvements without departing from the concept of this application, and these modifications and improvements are all within the scope of protection of this application. Therefore, the scope of protection of this patent application shall be based on the appended claims.

Claims

1. An imitation leather decorative part, characterized in that: The imitation leather decorative piece is arranged on the surface of the cosmetic container, and the raw material component of the imitation leather decorative piece includes thermoplastic polyurethane elastomer.

2. The imitation leather decorative piece according to claim 1, characterized in that: The invention comprises the following raw material components in parts by weight: 84-99.5 parts of thermoplastic polyurethane elastomer, 0.05-0.5 parts of antioxidant and 0.05-0.5 parts of lubricant.

3. The imitation leather decorative piece according to claim 1, characterized in that: The thermoplastic polyurethane elastomer comprises the following raw material components in parts by weight: 60-80 parts of polyol, 16-31 parts of isocyanate and 3.5-9 parts of chain extender.

4. The imitation leather decorative piece according to claim 1, characterized in that: The Shore hardness of the thermoplastic polyurethane elastomer is 63-69A.

5. The imitation leather decorative piece according to claim 1, characterized in that: The 100% elastic modulus of the thermoplastic polyurethane elastomer is ≥2MPa, and the 300% elastic modulus is ≥4MPa.

6. The imitation leather decorative piece according to claim 1, characterized in that: The elongation at break of the thermoplastic polyurethane elastomer is ≥400%.

7. The imitation leather decorative piece according to claim 1, characterized in that: The tensile strength of the thermoplastic polyurethane elastomer is ≥10MPa.

8. The imitation leather decorative piece according to claim 1, characterized in that: The density of the thermoplastic polyurethane elastomer is 1.0-1.4 g / cm 3 .

9. The imitation leather decorative piece according to claim 1, characterized in that: The tear strength of the thermoplastic polyurethane elastomer is ≥40 kN / m.

10. The imitation leather decorative piece according to claim 1, characterized in that: The thermoplastic polyurethane elastomer has a glass transition temperature of -45°C to -40°C.

11. The imitation leather decorative piece according to any one of claims 1 to 10, characterized in that: The raw material components also include masterbatches, and the weight portion of the masterbatches is 0.3-10 parts.

12. The imitation leather decorative piece according to claim 11, characterized in that: The raw material components also include polyolefin, and the weight portion of the polyolefin is 1-15 parts.

13. The imitation leather decorative piece according to claim 12, characterized in that: The polyolefin includes at least one of polypropylene, polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer and methyl methacrylate.

14. The imitation leather decorative piece according to claim 12, characterized in that: The raw material components also include an anti-sticking agent, and the weight portion of the anti-sticking agent is 0.1-0.5 parts.

15. The imitation leather decorative piece according to claim 14, characterized in that: The raw material components also include 8 parts by weight of polyethylene.

16. The imitation leather decorative piece according to claim 14, characterized in that: The raw material components also include 10 parts by weight of polyethylene.

17. The imitation leather decorative piece according to claim 14, characterized in that: The raw material components also include 10 parts by weight of polyethylene and 5 parts by weight of all-purpose black masterbatch.

18. The imitation leather decorative piece according to claim 14, characterized in that: The raw material components also include 5 parts by weight of polyolefin elastomer and 5 parts by weight of polyethylene.

19. A cosmetic container, characterized in that: The imitation leather decorative piece comprises any one of claims 1 to 18, wherein the imitation leather decorative piece is attached to a mounting surface of a cosmetic container (200), wherein the mounting surface comprises a flat surface or a curved surface.

20. The cosmetic container according to claim 19, characterized in that: The decorative element is assembled on the assembly surface of the cosmetic container (200) by bonding, clamping or hot pressing.

21. The cosmetic container according to claim 19, characterized in that: The decorative element comprises a decorative element body (100), wherein the decorative element body (100) comprises a decorative portion (113), wherein the decorative portion (113) comprises at least one of a protrusion, a groove and a stitching line.

22. The cosmetic container according to claim 21, characterized in that: A cavity is provided between the assembly surfaces of the decorative element body (100) and the cosmetic container (200).

23. The cosmetic container according to claim 22, characterized in that: The cavity is filled with soft filling.

24. The cosmetic container according to claim 22, characterized in that: The decorative part body (100) at the location corresponding to the cavity is in a convex arc-shaped structure, and two points are randomly selected on the decorative part body (100) at the location corresponding to the cavity, and the thicknesses of the decorative part body (100) at the two points are respectively D1 and D2, and the difference between D1 and D2 is less than the tolerance of the decorative part body.

25. A method for preparing the imitation leather decorative part according to any one of claims 1 to 18, characterized in that: The steps include: Manufacturing thermoplastic polyurethane elastomer particles: mixing raw materials uniformly and injecting them into a twin-screw extruder for granulation to obtain thermoplastic polyurethane elastomer particles, wherein the raw materials include polyol, isocyanate and chain extender; Injection-molded imitation leather decorative parts: thermoplastic polyurethane elastomer particles, antioxidants and lubricants are injected into an injection molding machine, and the imitation leather decorative parts are obtained by injection molding using the injection molding machine.

26. The preparation method according to claim 25, characterized in that: The process for producing thermoplastic polyurethane elastomer particles comprises the following steps: Preparation of materials: weighing raw materials according to the formula, wherein the raw materials include polyol, isocyanate and chain extender; Degassing: Degas the raw materials under vacuum environment; Mixing: Put the raw materials into a high-speed mixer and stir them evenly to obtain a mixture, and then dry the mixture; Granulation: The dried mixture is added into the main feeding hopper of the twin-screw extruder, and thermoplastic polyurethane elastomer particles are obtained through plasticization, extrusion, stranding, air drying and granulation.

27. The preparation method according to claim 25, characterized in that: The injection molding process for imitation leather decorative parts comprises the following steps: Ingredients: weighing materials according to the formula, wherein the materials include thermoplastic polyurethane elastomer particles, antioxidants and lubricants; Injection into an injection molding machine: injecting the thermoplastic polyurethane elastomer particles into an injection molding machine for hot melting; Adding auxiliary materials: adding the antioxidant into the injection molding machine and mixing evenly, and then adding the lubricant into the injection molding machine and mixing evenly to obtain a molten mixture; Molding: injecting the molten mixture into a mold of an injection molding machine to obtain an imitation leather decorative part.

28. The preparation method according to claim 27, characterized in that: The material also includes at least one of polyolefin, masterbatch and anti-adhesive. In the step of injecting into the injection molding machine, at least one of the polyolefin, masterbatch and anti-adhesive is added into the injection molding machine and hot-melted together with the thermoplastic polyurethane elastomer particles.

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