Anion organic silicon synthetic leather

Abstract

The invention belongs to the technical field of synthetic leather, and discloses negative ion organic silicon synthetic leather, which comprises 10-100 parts of a polymer liquid organic silicon material, 1-10 parts of a negative ion crystal material, 10-50 parts of a leather base material, 1-10 parts of a pigment and 1-10 parts of a functional auxiliary agent, and is characterized in that air purification and peculiar smell elimination are realized through negative ion release, and formaldehyde, peculiar smell and bacteria are inhibited; the leather is adaptive to scenes with requirements on environmental health, such as automotive trim and home furnishing, and the organic silicon material and the leather base material are ensured to be tightly combined through processes such as high-temperature plasticizing molding and stripping and winding, so that layering is avoided; the coating thickness, temperature and time are accurately controlled, the stability of the structure of a finished product is guaranteed, meanwhile, the negative ion crystal material is evenly distributed, the release and purification functions are maximized, finally, the functions of purifying air, inhibiting bacteria, removing peculiar smell and the like are stably presented, meanwhile, the practicability of the synthetic leather is pertinently improved through the surface functional layer, and actual application and operation are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of synthetic leather, and more particularly to an anion organosilicon synthetic leather. Background Art

[0002] In the application field of synthetic leather, with the development of industries such as automotive interiors, furniture, home furnishings, and clothing, the market has put forward higher requirements for the comprehensive performance of leather materials.

[0003] Existing leather products have significant deficiencies: First, their high and low temperature resistance is weak, and they are prone to brittle fracture or deformation in the face of extreme temperature environments, unable to meet the needs of special scenarios (such as the problem of "high and low temperature difference resistance"); Second, their environmental protection defects are prominent, there is a problem of odor release, which is contrary to the environmental protection requirements of scenarios such as healthy homes and automotive interiors (such as "having odor and being non-environmental"); Third, their physical properties are not good, their folding resistance is poor and they are not scratch-resistant, resulting in limited service life (such as "being easily broken and not scratch-resistant"). Summary of the Invention

[0004] One of the purposes of the present invention is to provide an anion organosilicon synthetic leather.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: an anion organosilicon synthetic leather, comprising 10 - 100 parts of a high molecular liquid organosilicon material, 1 - 10 parts of an anion crystal material, 10 - 50 parts of a leather substrate, 1 - 10 parts of a pigment, and 1 - 10 parts of a functional additive: the surface functional layer is covered on the surface of the organosilicon functional composite layer through a surface treatment process; the organosilicon functional composite layer and the leather base layer form an interfacial bonding layer through high-temperature plasticization.

[0006] Preferably, it includes the following steps:

[0007] Step 1: Mix the high molecular liquid organosilicon material and the anion crystal material by stirring at a speed of 800 - 1500 r - min for 30 - 60 min under vacuum conditions according to the mass percentage to form a premix;

[0008] Step 2: Coat the mixture on the release paper with a thickness of 0.3 - 1.5 mm and bake it at 120 - 260 °C for 5 - 20 min to form a pre-cured organosilicon coating;

[0009] Step 3: Bond the dried leather substrate to the surface of the pre-cured organosilicon coating and keep it under pressure at 150 - 220 °C and a pressure of 0.2 - 1 MPa for 5 - 15 min to thermally press and compound the organosilicon coating and the leather substrate;

[0010] Step 4: Add the leather substrate and the pigment to the premix and perform high-speed shear dispersion under the protection of an inert gas, controlling the temperature at 40 - 60 °C;

[0011] Step 5: After cooling to room temperature, peel the synthetic leather from the release paper, and form a surface functional layer on the surface of the silicone coating by spraying, roll coating or dip coating processes;

[0012] Step 6: Peel the cured material from the release paper, and after surface functionalization treatment, wind it into rolls and package.

[0013] Preferably, the surface functional layer is one of an antibacterial coating, a waterproof coating, an antifouling coating or a wear-resistant coating. The raw materials of the antibacterial coating include nano silver particles, chitosan or quaternary ammonium salt antibacterial agents.

[0014] Preferably, the surface functionalization treatment in Step 6 includes:

[0015] A: Adopt atmospheric plasma treatment, with a power of 20 - 50 kW and a treatment speed of 3 - 10 m / min;

[0016] B: Coat a fluorosilicone oxide protective layer with a thickness of 50 - 200 nm;

[0017] C: Imprint a nano-scale microstructured surface with a characteristic size of 200 - 800 nm.

[0018] Preferably, the particle size of the negative ion crystal material is between 200 and 800 mesh, and it is surface modified by a silane coupling agent. The leather substrate includes one of natural leather fibers and synthetic leather fibers, the fiber length is controlled at 0.5 - 5 mm, and it is pretreated by plasma to form a surface microporous structure. The viscosity of the high molecular liquid silicone material is 5000 - 20000 cps, and it includes vinyl silicone oil, hydrogen-containing silicone oil and a platinum catalyst. The functional additives include two complexes of an ultraviolet absorber, a flame retardant and an antibacterial agent.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) Through the formulation, the multi-component compounding enables the synthetic leather to have excellent temperature change stability, meet the environmental protection requirements, and at the same time achieve air purification and odor elimination through negative ion release, inhibit formaldehyde, odor, and bacteria, and be suitable for scenarios such as automotive interiors and homes that have requirements for environmental health. And through processes such as "high-temperature plasticizing and forming" and "peeling and winding", it ensures that the silicone material is tightly combined with the leather substrate to avoid delamination; by precisely controlling the coating thickness, temperature, and time, it guarantees the stable structure of the finished product, and at the same time makes the negative ion crystal material evenly distributed to maximize the release of the purification function, and finally realizes the stable presentation of functions such as "purifying air, antibacterial, and removing odor". At the same time, the surface functional layer specifically enhances the practicality of the synthetic leather: the antibacterial coating inhibits the growth of bacteria to meet the hygiene requirements; the waterproof and antifouling coating is convenient for cleaning and maintenance, which fits the easy-to-clean scenarios of automotive interiors and homes; the wear-resistant coating extends the service life and strengthens the durability of the material, and the plasma treatment improves the bonding fastness of the functional layer; the fluorosiloxane protective layer realizes waterproof and antifouling, and at the same time the nano-microstructure imprint enhances the wear-resistant characteristics and extends the service life of the material, comprehensively improving the product quality. The material pretreatment optimizes the interfacial bonding force to avoid delamination; the negative ion crystal stably releases negative ions to strengthen the air purification and odor removal functions; the microporous structure of the leather substrate improves the composite strength; the cross-linking and curing of the silicone material endows it with high and low temperature resistance characteristics ("not brittle at -40°C and not deformed at 230°C"), and the functional additives supplement the advantages of weather resistance, flame retardancy, etc., comprehensively enhancing the functionality and durability of the synthetic leather. Detailed implementation manners

[0021] Next, in combination with the detailed implementation manners, the present invention will be further described. It should be noted that on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0022] In the description of the present invention, it should be noted that for orientation terms, if there are terms such as "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicating orientation and position relationships, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence.

[0024] One preferred embodiment of the present invention is an anion organosilicon synthetic leather, which comprises 10 - 100 parts of a high molecular liquid organosilicon material, 1 - 10 parts of an anion crystal material, 10 - 50 parts of a leather substrate, 1 - 10 parts of a pigment, and 1 - 10 parts of a functional additive: the surface functional layer is covered on the surface of the organosilicon functional composite layer through a surface treatment process; the organosilicon functional composite layer and the leather base layer form an interfacial bonding layer through high-temperature plasticization.

[0025] It includes the following steps:

[0026] Step 1: Stir and mix the high molecular liquid organosilicon material and the anion crystal material by mass percentage at a speed of 800 - 1500 r - min for 30 - 60 min under vacuum conditions to form a premix.

[0027] Step 2: Coating the mixture on the release paper with a thickness of 0.3 - 1.5 mm, and baking it at 120 - 260 °C for 5 - 20 min to form a pre-cured organosilicon coating.

[0028] Step 3: Bond the dried leather substrate to the surface of the pre-cured organosilicon coating, and keep it under pressure at 150 - 220 °C and 0.2 - 1 MPa for 5 - 15 min to thermocompression bond the organosilicon coating and the leather substrate.

[0029] Step 4: Add the leather substrate and the pigment to the premix, and perform high-speed shear dispersion under the protection of an inert gas, controlling the temperature at 40 - 60 °C.

[0030] Step 5: After cooling to room temperature, peel the synthetic leather from the release paper, and form a surface functional layer on the surface of the organosilicon coating through spraying, roll coating or dip coating processes.

[0031] Step 6: Peel the cured material from the release paper, and perform surface functionalization treatment and then roll and package it.

[0032] The surface functional layer is one of an antibacterial coating, a waterproof coating, an antifouling coating or a wear-resistant coating, and the raw materials of the antibacterial coating include nano silver particles, chitosan or quaternary ammonium salt antibacterial agents.

[0033] The surface functionalization treatment in Step 6 includes:

[0034] A: Adopt atmospheric plasma treatment, with a power of 20 - 50 kW and a treatment speed of 3 - 10 m - min;

[0035] B: Coating a fluorosiloxane protective layer with a thickness of 50 - 200 nm;

[0036] C: Imprinting a nano-scale microstructured surface with a characteristic size of 200 - 800 nm.

[0037] The particle size of the negative ion crystal material is between 200-800 meshes, and the surface is modified by a silane coupling agent. The leather substrate comprises one of natural leather fibers and synthetic leather fibers, the fiber length is controlled at 0.5-5 mm, and a surface microporous structure is formed after plasma pretreatment. The viscosity of the polymer liquid silicone material is 5000-20000 cps, and it comprises vinyl silicone oil, hydrogen-containing silicone oil and a platinum catalyst. The functional additives include two complexes of ultraviolet absorbers, flame retardants and antibacterial agents.

[0038] Working principle:

[0039] When in use, the polymer liquid organic silicon material is used as the matrix, and the negative ion crystal material is introduced through physical mixing to utilize its negative ion releasing property; the leather substrate provides structural support, the pigment imparts color, and the functional additives supplement special properties. After high-temperature plasticization, the various components synergistically form an organic silicon functional composite layer, an interface bonding layer and a surface functional layer to construct a multi-level functional structure. The polymer liquid organic silicon material and the negative ion crystal material are fully mixed by vacuum stirring to avoid interference from impurities;

[0040] Coating and baking form a pre-cured coating, laying the foundation for subsequent compounding;

[0041] Hot pressing compounding allows the silicone coating and the leather substrate to form a firm interface bonding layer through high temperature melting and pressure penetration;

[0042] The surface process gives the final functional layer, and each step is linked together to achieve uniform material dispersion and functional integration;

[0043] Nanosilver particles, chitosan, etc. in antibacterial coatings destroy bacterial cell membranes or inhibit metabolic activities by contacting bacterial cells; waterproof coatings form hydrophobic layers through low surface energy substances, antifouling coatings reduce stain adhesion by physical barriers, and wear-resistant coatings resist friction by enhancing surface hardness. Plasma is used to bombard the material surface to etch out microscopic rough structures, increase surface active groups, and improve the adhesion of subsequent coatings; an extremely thin low surface energy protective layer is formed to make it difficult for water and stains to adhere; the surface friction coefficient or hydrophobic angle is changed through microscopic geometric structures to enhance wear resistance or antifouling properties; negative ion crystal materials are modified with silane coupling agents to improve compatibility with silicone materials and ensure continuous and stable release of negative ions; leather substrates are plasma pretreated to form surface micropores to increase mechanical engagement with silicone coatings; polymer liquid silicone materials (vinyl silicone oil, etc.) are cross-linked and cured under the action of platinum catalysts, and functional additives (such as ultraviolet absorbers) synergistically improve weather resistance, flame retardancy and other properties.

[0044] The basic principles, main features and advantages of the present invention have been described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. Negative ion organosilicon synthetic leather, characterized in that, It includes 10 - 100 parts of high molecular liquid silicone material, 1 - 10 parts of negative ion crystal material, 10 - 50 parts of leather substrate, 1 - 10 parts of pigment, and 1 - 10 parts of functional additives: The surface functional layer is covered on the surface of the silicone functional composite layer through a surface treatment process; The silicone functional composite layer and the leather base layer form an interface bonding layer through high-temperature plasticization.

2. The negative ion organosilicon synthetic leather according to claim 1, characterized in that: It includes the following steps: Step 1: Stir and mix the high molecular liquid silicone material and the negative ion crystal material at a speed of 800 - 1500 r - min for 30 - 60 min under vacuum conditions according to the mass percentage to form a premix. Step 2: Coating the mixture on the release paper with a thickness of 0.3 - 1.5 mm, and baking it at 120 - 260 °C for 5 - 20 min to form a pre-cured silicone coating. Step 3: Bond the dried leather substrate to the surface of the pre-cured silicone coating, and keep the pressure at 150 - 220 °C and 0.2 - 1 MPa for 5 - 15 min to thermally press and compound the silicone coating and the leather substrate. Step 4: Add the leather substrate and the pigment to the premix, and perform high-speed shear dispersion under the protection of inert gas, controlling the temperature at 40 - 60 °C. Step 5: After cooling to room temperature, peel the synthetic leather from the release paper, and form a surface functional layer on the surface of the silicone coating through spraying, roll coating or dip coating processes. Step 6: Peel the cured material from the release paper, and perform surface functionalization treatment and then roll and package it.

3. The negative ion organosilicon synthetic leather according to claim 1, wherein: The surface functional layer is one of an antibacterial coating, a waterproof coating, an antifouling coating or a wear-resistant coating. The raw materials of the antibacterial coating include nano silver particles, chitosan or quaternary ammonium salt antibacterial agents.

4. The negative ion organosilicon synthetic leather according to claim 1, wherein: The surface functionalization treatment in Step 6 includes: A: Adopt atmospheric plasma treatment, with a power of 20 - 50 kW and a treatment speed of 3 - 10 m - min. B: Coating a fluorosilicone oxide protective layer with a thickness of 50 - 200 nm. C: Imprinting a nano-scale microstructured surface with a characteristic size of 200 - 800 nm.

5. The anionic organosilicon synthetic leather according to claim 1, wherein: The particle size of the negative ion crystal material is between 200 - 800 mesh, and it is surface-modified with a silane coupling agent. The leather substrate includes one of natural leather fibers and synthetic leather fibers, the fiber length is controlled at 0.5 - 5 mm, and it is pretreated with plasma to form a surface microporous structure. The viscosity of the high molecular liquid silicone material is 5000 - 20000 cps, and it includes vinyl silicone oil, hydrogen-containing silicone oil and a platinum catalyst. The functional additives include two complexes of ultraviolet absorbers, flame retardants and antibacterial agents.