Imitation leather decorating part, preparation method thereof and cosmetic container

Abstract

The invention relates to a leather-imitating decorating part, a preparation method thereof and a cosmetic container, the leather-imitating decorating part is arranged on the surface of the cosmetic container, and the raw material component of the leather-imitating decorating part comprises a thermoplastic polyurethane elastomer. The decorating part has the appearance similar to leather and the touch feeling of the leather, the decorating part is attached to the surface of the cosmetic container, the effect of protecting the container is achieved, meanwhile, the visual feeling of the leather is brought to people, and the grade of a product is improved.

Description

Technical Field

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

[0002] As daily consumables, cosmetics have been widely used by people. With the development of society and the continuous improvement of human aesthetics, the pursuit of fashion and novelty has become an eternal topic for people. People's requirements for cosmetic containers have also changed from traditional economic practicality to high-end fashion. Therefore, in order to meet this demand of consumers, imitation leather patches are usually attached to cosmetic containers. However, the current imitation leather patches are made of multiple layers of materials, which is not only costly and not conducive to mass production, but also easy to fall off between the multiple layers of materials, affecting the visual effect. Summary of the invention

[0003] In order to overcome the above defects, the present application provides an imitation leather decorative piece, which has a leather-like appearance and leather-like touch. It is attached to the surface of a cosmetic container, which not only protects the container, but also gives people a leather visual sense, thereby improving the grade of the product.

[0004] The technical solution adopted by this application to solve its technical problems is:

[0005] The invention discloses an imitation leather decorative piece, which is arranged on the surface of a cosmetic container and whose raw material components include thermoplastic polyurethane elastomer.

[0006] Optionally, the imitation leather decorative part 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.

[0007] 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.

[0008] Optionally, the Shore hardness of the thermoplastic polyurethane elastomer is 63-69A.

[0009] Optionally, the 100% elastic modulus of the thermoplastic polyurethane elastomer is ≥ 2 MPa, and the 300% elastic modulus is ≥ 4 MPa.

[0010] Optionally, the elongation at break of the thermoplastic polyurethane elastomer is ≥400%.

[0011] Optionally, the tensile strength of the thermoplastic polyurethane elastomer is ≥10 MPa.

[0012] Optionally, the density of the thermoplastic polyurethane elastomer is 1.0-1.4 g / cm 3 .

[0013] Optionally, the tear strength of the thermoplastic polyurethane elastomer is ≥40 kN / m.

[0014] Optionally, the thermoplastic polyurethane elastomer has a glass transition temperature of -45°C to -40°C.

[0015] Optionally, the raw material components further include a masterbatch, and the weight portion of the masterbatch is 0.3-10 parts.

[0016] Optionally, the raw material components further include polyolefin, and the weight portion of the polyolefin is 1-15 parts.

[0017] Optionally, the polyolefin includes at least one of polypropylene, polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer and methyl methacrylate.

[0018] Optionally, the raw material components further include an anti-tackifier, and the weight portion of the anti-tackifier is 0.1-0.5 parts.

[0019] Optionally, the raw material components further include 8 parts by weight of polyethylene.

[0020] Optionally, the raw material components further include 10 parts by weight of polyethylene.

[0021] Optionally, the raw material components further include 10 parts by weight of polyethylene and 5 parts by weight of universal black masterbatch.

[0022] Optionally, the raw material components further include 5 parts by weight of polyolefin elastomer and 5 parts by weight of polyethylene.

[0023] 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.

[0024] Optionally, the decorative element is assembled to the assembly surface of the cosmetic container by bonding, clamping or hot pressing.

[0025] 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.

[0026] Optionally, a cavity is provided between the decorative element body and the assembly surface of the cosmetic container.

[0027] Optionally, the cavity contains a soft filler.

[0028] Optionally, the decorative part body corresponding to the cavity is a convex arc structure, and any two points are taken on the decorative part body corresponding to the cavity, and the thicknesses of the decorative part body at the two points are D1 and D2 respectively, then the difference between D1 and D2 is less than the tolerance of the decorative part body.

[0029] The present application also provides a method for preparing the imitation leather decorative piece, comprising the following steps:

[0030] 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;

[0031] 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.

[0032] Optionally, the process for producing thermoplastic polyurethane elastomer particles comprises the following steps:

[0033] Preparation of materials: weighing raw materials according to the formula, wherein the raw materials include polyol, isocyanate and chain extender;

[0034] Degassing: Degas the raw materials under vacuum environment;

[0035] Mixing: Put the raw materials into a high-speed mixer and stir them evenly to obtain a mixture, and then dry the mixture;

[0036] 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.

[0037] Optionally, the injection molding process of the imitation leather decorative piece comprises the following steps:

[0038] Ingredients: weighing materials according to the formula, wherein the materials include thermoplastic polyurethane elastomer particles, antioxidants and lubricants;

[0039] Injection into an injection molding machine: injecting the thermoplastic polyurethane elastomer particles into an injection molding machine for hot melting;

[0040] 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;

[0041] Molding: injecting the molten mixture into a mold of an injection molding machine to obtain an imitation leather decorative part.

[0042] 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.

[0043] The beneficial effects of this application are:

[0044] 1) The decorative parts in the present application are formed into a single-layer integrated structure by injection molding of thermoplastic polyurethane elastomer and chemical additives, 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.

[0045] 2) The decorative piece in the present application 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. Compared with the traditional pressed silicone substrate combined with imitation leather surface products, the decorative piece has high hardness, strong toughness, and is more durable;

[0046] 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 that of leather, visual effects, and better feel. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is one of the structural schematic diagrams of the imitation leather decorative part in this application;

[0048] Figure 2 This is the second structural schematic diagram of the imitation leather decorative part in this application;

[0049] Figure 3 This is the third structural schematic diagram of the imitation leather decorative part in this application;

[0050] Figure 4 This is a schematic diagram of the structure of the cosmetic container in this application;

[0051] 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

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the embodiments described in the present application are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present 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 present 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 of their variations 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0055] The invention discloses an imitation leather decorative piece, which is arranged on the surface of a cosmetic container and whose raw material components include thermoplastic polyurethane elastomer.

[0056] Optionally, the imitation leather decorative piece includes 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. The imitation leather decorative piece is made of thermoplastic polyurethane elastomer, namely TPU, by injection molding. The decorative piece has a leather-like appearance and touch. It is attached to the surface of the cosmetic container, which not only protects the container, but also gives people a leather visual sense, thereby improving the grade of the product. The decorative piece is made of plastic material, which is more wear-resistant and elastic than leather. Compared with the traditional pressed silicone substrate combined with imitation leather surface products, the decorative piece has high hardness, strong toughness, good wear resistance and is more durable.

[0057] 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. Optionally, 65-80 parts of polyol, 20-25 parts of isocyanate and 5-7 parts of chain extender. The hardness, elasticity, elongation and other indicators of the plastic polyurethane elastomer prepared by the above raw material ratio can meet the requirements of imitation leather decorative parts.

[0058] 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.

[0059] Optionally, the antioxidant is at least one of hindered phenol, hydroxylamine, thioether and triazine antioxidants; the lubricant is at least one of erucamide lubricants, oleamide lubricants and stearic acid lubricants.

[0060] Among them, the role of antioxidants is to inhibit thermal oxidative aging during material production and material use, and lubricants are beneficial to demolding during injection molding. Hindered phenols include antioxidant 1010, antioxidant 1024, antioxidant 1076, antioxidant 1135, antioxidant 1098, and antioxidant 245; phosphites include antioxidant 168, antioxidant P-EPQ, antioxidant PEP-36, antioxidant 626, antioxidant 9228, and antioxidant DPDP; thioethers include antioxidant DSTP, antioxidant DLTP, and antioxidant DMTP; triazines include antioxidant STA-1, antioxidant 565, and antioxidant 3114.

[0061] The Shore hardness of the thermoplastic polyurethane elastomer is 63-69A. Optionally, the Shore hardness of the thermoplastic polyurethane elastomer is 65-69A, and 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.

[0062] The glass transition temperature of the thermoplastic polyurethane elastomer is -45°C to -40°C. The glass transition temperature Tg is measured by differential scanning calorimetry at a condition of 10°C / min. Optionally, the properties of the thermoplastic polyurethane elastomer are as follows: 100% elastic modulus is 2-5MPa; 300% elastic modulus is 4-8MPa; elongation at break is 600-800%; density is 1.1-1.25g / cm 3 ; Tensile strength is 10-20MPa; Tear strength is 60-70KN / m.

[0063] The raw material components also include masterbatches, and the weight of the masterbatches is 0.3-10 parts. The raw materials of the masterbatches include polyurethane elastomers, polyolefins, pigments, fillers, dispersants, etc. The pigments include inorganic pigments or organic pigments. The inorganic pigments include at least one of titanium dioxide, carbon black, and iron blue. The organic pigments include one of azo raw materials, phthalocyanine pigments, and heterocyclic pigments. The masterbatches made using titanium dioxide as a pigment are white masterbatches, and the masterbatches made using carbon black as a pigment are black masterbatches. Adding masterbatches can not only obtain decorative pieces of different colors, but also improve the toughness of the decorative pieces.

[0064] The raw material components also include polyolefin, and the weight portion of polyolefin is 1-15 parts. Polyolefin is added to the raw material as a toughening agent, and the decorative piece containing polyolefin has good toughness, so the obtained decorative piece has a good feel and is not sticky.

[0065] 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.

[0066] The raw material components also 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.

[0067] The raw material components also include 8 parts by weight of polyethylene, wherein the polyethylene is LH606 high-density polyethylene.

[0068] The raw material components also 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.

[0069] The raw material components also include 10 parts by weight of polyethylene and 5 parts by weight of universal black masterbatch, wherein the polyethylene is LH606 high-density polyethylene.

[0070] The raw material components also include 5 parts by weight of polyolefin elastomer and 5 parts by weight of polyethylene.

[0071] like Figure 4 As shown, a cosmetic container includes an imitation leather decorative piece, which is attached to the assembly surface of the cosmetic container 200, and the assembly surface includes a plane or a curved surface. The assembly surface includes an upper surface and / or surrounding side surfaces, that is, the decorative piece can be attached to the upper surface of the cosmetic container, or the surrounding side surfaces of the cosmetic container, or the upper surface and surrounding side surfaces of the cosmetic container. Among them, the upper surface of the cosmetic container can be a plane or a curved surface, and the surrounding side walls of the cosmetic container are curved surfaces. That is, the decorative piece can be attached to the assembly surface such as a plane or a curved surface of the cosmetic container 200.

[0072] The decorative piece is assembled on the mounting surface of the cosmetic container 200 by bonding, clamping or hot pressing. The decorative piece has a leather-like appearance and leather-like touch. When attached to the mounting surface of the cosmetic container, it not only protects the container, but also gives people a leather-like visual sense, thereby improving the grade of the product.

[0073] like Figure 1-3 As shown, the decorative piece includes a decorative piece body 100, and the decorative piece body 100 includes a decorative portion 113, and the decorative portion 113 includes at least one of a protrusion, a groove and a suture line. The decorative portion 113 and the decorative piece body 100 are integrally formed by injection molding. The imitation leather decorative piece includes a decorative piece body 100, and the decorative piece body 100 includes a first surface 110 and a second surface 120 arranged opposite to each other. The first surface 110 includes a ridge 111 and a recessed portion 112 arranged at intervals from each other, and the projection of the recessed portion 112 on the second surface 120 is a joint portion, and the joint portion is used to make the decorative piece body 100 and the cosmetic container 200 be combined. Among them, the first surface 110 of the decorative piece body 100 is an outer surface, the second surface 120 is an inner surface, and the joint portion is a part of the second surface 120. Optionally, the joint portion is a plane, and the joint portion is directly attached to the outer surface of the cosmetic container by glue or tape, so as to achieve the function of protecting and decorating the container through the first surface 110; the first surface 110 is a decorative outer surface. The shape of the decorative part body 100 can be adjusted according to the structure of the cosmetic container, for example, it can be rectangular, square, oval, circular, etc. In addition to the decorative part body, the decorative part can also include other components. For example, the first surface 110 of the decorative part body 100 can be attached with a protective film for protecting the patch substrate, and the second surface 120 can be attached with an adhesive layer for sticking the patch substrate to the surface of the cosmetic container. This decorative part has a leather-like appearance and leather-like touch. It is attached to the outer surface of the cosmetic container, which not only protects the container, but also gives people a leather-like visual sense, improving the grade of the product; this decorative part is made of plastic material, which is more wear-resistant and elastic than leather; compared with the traditional pressed silicone substrate combined with imitation leather surface products, this decorative part has high hardness, strong toughness, and is more durable.

[0074] A decorative portion 113 is disposed on the first surface 110 . The decorative portion 113 is recessed toward the second surface 120 , or the decorative portion 113 protrudes from the raised portion 111 . Figure 4 The decorative part 113 shown in the figure is A. In practical applications, the letter A can be made into any image. The decorative part 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, which is simple and convenient to manufacture. The decorative part of the decorative part can be selected from the decorative part that the consumer likes, or the character with a specific meaning, so as to meet the diverse needs of consumers. In another possible implementation, the groove formed by the decorative part 113 can be inlaid or pasted with a corresponding insert. In other implementations, the decorative part 113 can also be designed as a convexity, and the decorative part 113 protrudes from the raised part 11, that is, the decorative part is higher than the first surface 110, and the consumer can touch the symbol, and the overall structure of the decorative part is more three-dimensional and more novel.

[0075] There is a cavity between the decorative part body 100 and the assembly surface of the cosmetic container 200. There is a cavity between the decorative part body 100 and the container assembly surface. When the decorative part is pressed, the part of the decorative part with the cavity can be deformed to improve the hand feel. Traditional leather materials can be deformed when pressed by the tension of the material itself, while the imitation leather decorative part of the present application can have the same pressing deformation effect and hand feel as leather through the effect of the cavity. If there is no cavity, the material is relatively hard when pressed, the deformation degree is very low, and the hand feel is not good, so the material requirements of the decorative part are relatively high.

[0076] The cavity may not be filled with any substance, but may be filled with a soft filler, such as sponge, foam, cotton, silica gel, or other flexible material.

[0077] The decorative portion 113 divides the cavity into M sub-cavities, and the lower surface of the decorative portion 113 is attached to the mounting surface of the cosmetic container 200, where M≥2, and M is an integer. That is, the lower surface of the decorative portion 113 is convex toward the cosmetic container, and the lower surface of the decorative portion 113 is attached to the mounting surface of the cosmetic container 200 to divide the cavity into 2, 3, or more than 3 sub-cavities.

[0078] The decorative part body 100 at the corresponding part of the cavity is a convex arc structure, and if two points are taken at random on the decorative part body 100 at the corresponding part of the cavity, the thickness of the decorative part body 100 at the two points is D1 and D2 respectively, and the difference between D1 and D2 is less than the tolerance of the decorative part body. That is, the decorative part body 10 at the corresponding part of the cavity is a convex arc structure with the same thickness.

[0079] A method for preparing an imitation leather decorative piece comprises the following steps:

[0080] 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;

[0081] 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.

[0082] The process for producing thermoplastic polyurethane elastomer particles comprises the following steps:

[0083] Preparation of materials: weighing raw materials according to the formula, wherein the raw materials include polyol, isocyanate and chain extender;

[0084] Degassing: Degas the raw materials under vacuum environment;

[0085] Mixing: Put the raw materials into a high-speed mixer and stir them evenly to obtain a mixture, and then dry the mixture;

[0086] 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.

[0087] Among them, the injection molding process of imitation leather decorative parts includes the following steps:

[0088] Ingredients: weighing materials according to the formula, wherein the materials include thermoplastic polyurethane elastomer particles, antioxidants and lubricants;

[0089] Injection molding machine: inject thermoplastic polyurethane elastomer granules into the injection molding machine for hot melting;

[0090] 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;

[0091] Molding: Inject the molten mixture into the mold of the 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, mixes and dries the raw materials, and then uses a twin-screw extruder to granulate to obtain thermoplastic polyurethane elastomer particles. 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.

[0092] Wherein, 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 polyolefin, masterbatch and anti-adhesive is added into the injection molding machine and hot-melted together with thermoplastic polyurethane elastomer particles. During injection molding, at least one of the masterbatch and polyolefin is put into the injection molding machine and injection-molded together with the thermoplastic polyurethane elastomer particles to obtain leather decorative parts, which can improve the toughness of the leather decorative parts and make the leather decorative parts have a more comfortable feel and are not sticky. During injection molding, only polyolefin or masterbatch can be added, or polyolefin and masterbatch can be added at the same time to obtain leather decorative parts of different colors.

[0093] 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.

[0094] 1. Preparation of Thermoplastic Polyurethane Elastomer and Leather-like Decorative Parts of Examples

[0095] Embodiment 1:

[0096] The preparation of thermoplastic polyurethane elastomer particles comprises the following steps:

[0097] Step 1: preparing materials: weighing 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, the isocyanate is 4,4'-diphenylmethane diisocyanate (MDI), and the chain extender is 1,4-butanediol;

[0098] Degassing: Degas the raw materials under vacuum environment for 15 minutes;

[0099] 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;

[0100] 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.

[0101] Embodiment 2:

[0102] The preparation of imitation leather decorative parts includes the following steps:

[0103] 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 obtained by injection molding using the injection molding machine.

[0104] Embodiment 3:

[0105] The preparation of imitation leather decorative parts includes the following steps:

[0106] 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 obtained by injection molding using the injection molding machine.

[0107] Embodiment 4:

[0108] The preparation of imitation leather decorative parts includes the following steps:

[0109] 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.

[0110] Embodiment 5:

[0111] The preparation of imitation leather decorative parts includes the following steps:

[0112] 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.

[0113] Embodiment 6:

[0114] The preparation of imitation leather decorative parts includes the following steps:

[0115] 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 obtained by injection molding using the injection molding machine.

[0116] Embodiment 7:

[0117] The preparation of imitation leather decorative parts includes the following steps:

[0118] 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 obtained by injection molding using the injection molding machine.

[0119] Embodiment 8:

[0120] The preparation of imitation leather decorative parts includes the following steps:

[0121] 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 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 parts were obtained by injection molding using the injection molding machine.

[0122] Embodiment 9:

[0123] The preparation of imitation leather decorative parts includes the following steps:

[0124] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 35 parts by weight of PE820, 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 obtained by injection molding using the injection molding machine.

[0125] Embodiment 10:

[0126] The preparation of imitation leather decorative parts includes the following steps:

[0127] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 37 parts by weight of PE820, 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 obtained by injection molding using the injection molding machine.

[0128] Embodiment 11:

[0129] The preparation of imitation leather decorative parts includes the following steps:

[0130] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 33 parts by weight of PE820, 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.

[0131] Embodiment 12:

[0132] The preparation of imitation leather decorative parts includes the following steps:

[0133] 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 obtained by injection molding using the injection molding machine.

[0134] Embodiment 13:

[0135] The preparation of imitation leather decorative parts includes the following steps:

[0136] 92 parts by weight of the thermoplastic polyurethane elastomer particles obtained in Example 1, 33 parts by weight of PE820, 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 obtained by injection molding using the injection molding machine.

[0137] Embodiment 14:

[0138] The preparation of imitation leather decorative parts includes the following steps:

[0139] 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 obtained by injection molding using the injection molding machine.

[0140] Embodiment 15:

[0141] The preparation of imitation leather decorative parts includes the following steps:

[0142] 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 obtained by injection molding using the injection molding machine.

[0143] Embodiment 16:

[0144] The preparation of imitation leather decorative parts includes the following steps:

[0145] 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 obtained by injection molding using the injection molding machine.

[0146] Embodiment 17:

[0147] The preparation of imitation leather decorative parts includes the following steps:

[0148] 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.

[0149] Among them, the manufacturer of NA207-66 low-density polyethylene LDPE is Taiwan Polymer Chemical Co., Ltd.;

[0150] The manufacturer of LH606 high-density polyethylene HDPE is Taiwan Polymer Chemicals Co., Ltd.

[0151] The manufacturer of PE8203 is Borealis;

[0152] The manufacturer of Queo8203 polyolefin elastomer POE is Borealis;

[0153] The manufacturer of polypropylene PP is Lee Chang Jung Chemical Industries Co., Ltd.

[0154] 2. Detection of the Embodiment

[0155] 1. The test data of Example 1 are shown in Table 1 below:

[0156] Table 1:

[0157]

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

[0159] Table 2:

[0160]

[0161] 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 softer. The surfaces of the decorative parts in the remaining examples had moderate hardness and softness, 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.

[0162] It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these modifications and improvements are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the attached 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: A soft filler is arranged in the cavity.

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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