Water-based environment-friendly solvent-free flame-retardant synthetic leather

Abstract

The utility model relates to the technical field of synthetic leather, in particular to water-based environment-friendly solvent-free flame-retardant synthetic leather which comprises TC cloth and solvent-free synthetic leather compounded with the TC cloth, and the solvent-free synthetic leather comprises a water-based polyurethane resin surface layer, a solvent-free layer and mercerized velvet base cloth. According to the mercerized velvet fabric, the isocyanate prepolymer and the polyether polyol are mixed for use, the isocyanate prepolymer and the polyether polyol can form high viscosity under the heating condition, the mercerized velvet fabric is bonded, the mercerized velvet fabric is very environment-friendly, and the surface layer waterborne polyurethane resin is formed by compounding aromatic polyether type resin and aliphatic polyether type resin. The aromatic polyether type resin has high heat resistance and improves the flame retardant effect of the material, and the aliphatic polyether type resin has good flexibility and makes the material more comfortable.

Description

Technical Field

[0001] The utility model relates to the technical field of synthetic leather, in particular to a water-based, environment-friendly, solvent-free, flame-retardant synthetic leather. Background Art

[0002] Traditional polyurethane synthesis contains a lot of organic solvents. With the enhancement of people's environmental awareness, the continuous improvement of laws and regulations in various countries, and the restriction of volatile organic compounds and toxic substances, environmentally friendly polyurethane is increasingly favored by the chemical industry; it has the characteristics of environmental friendliness and excellent usability, and has become a hot research topic in recent years. Waterborne polyurethane (WPU), as an important type of environmentally friendly polyurethane, uses water as a dispersant and rarely uses organic solvents during the processing. Therefore, it has the advantages of being non-toxic and not polluting the environment. Solvent-free polyurethane synthetic leather has certain advantages in price, other physical properties, operability and maturity, but polyurethane is not flame retardant. Therefore, how to mix solvent-free polyurethane synthetic leather and waterborne polyurethane for the production of synthetic leather is particularly important. We propose a water-based environmentally friendly solvent-free flame-retardant synthetic leather. Utility Model Content

[0003] The purpose of the utility model is to provide a water-based, environmentally friendly, solvent-free, flame-retardant synthetic leather to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A water-based environmentally friendly solvent-free flame-retardant synthetic leather comprises TC cloth and solvent-free synthetic leather compounded with the TC cloth, wherein the solvent-free synthetic leather comprises a water-based polyurethane resin surface layer, a solvent-free layer and a mercerized velvet base cloth.

[0006] Preferably, the solvent-free layer consists of a solvent-free A material layer and / or a solvent-free B material layer.

[0007] Preferably, the solvent-free A material layer is polyether polyol.

[0008] Preferably, the solvent-free B material layer is an isocyanate prepolymer.

[0009] Preferably, the waterborne polyurethane resin surface layer is a composite of an aromatic polyether resin and an aliphatic polyether resin, and the composite thickness is 8:2.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model uses isocyanate prepolymer and polyether polyol to mix, and the two will form high viscosity when heated, which can bond to the mercerized velvet base fabric and is very environmentally friendly. The surface layer water-based polyurethane resin is compounded by aromatic polyether resin and aliphatic polyether resin. The aromatic polyether resin has high heat resistance and improves the flame retardant effect of the material, while the aliphatic polyether resin has good softness, making the material more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the structure of the solvent-free synthetic leather in the utility model;

[0014] Figure 3 It is a schematic structural diagram of the waterborne polyurethane resin surface layer in the utility model.

[0015] In the figure: 1. solvent-free synthetic leather; 11. water-based polyurethane resin surface layer; 12. solvent-free layer; 13. mercerized velvet base fabric; 111. solvent-free A material layer; 112. solvent-free B material layer; 2. TC fabric. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0019] See also Figure 1-3 :

[0020] The utility model further describes the technical solution through the following embodiments:

[0021] A water-based environmentally friendly solvent-free flame-retardant synthetic leather comprises a TC cloth 2 and a solvent-free synthetic leather 1 compounded with the TC cloth 2. The solvent-free synthetic leather 1 comprises a water-based polyurethane resin surface layer 11, a solvent-free layer 12 and a mercerized velvet base cloth 13.

[0022] In this embodiment, the solvent-free layer 12 is composed of a solvent-free A material layer 111 and / or a solvent-free B material layer 112. Specifically, the solvent-free A material layer 111 is a polyether polyol, and the solvent-free B material layer 112 is an isocyanate prepolymer, which is formed by partial chain extension of isocyanate and polyether polyol. The isocyanate prepolymer formed by chain extension of isocyanate and polyether polyol as a tackifier has a greatly improved viscosity and is environmentally friendly and healthy.

[0023] Furthermore, the waterborne polyurethane resin surface layer 11 is a composite of aromatic polyether resin and aliphatic polyether resin, with a composite thickness of 8: 2. Aromatic polyether resin has high heat resistance, which improves the flame retardant effect of the material, while aliphatic polyether resin has good softness, making the material more comfortable.

[0024] The preparation method is as follows:

[0025] Step 1: Preparation of solvent-free layer 12

[0026] The solvent-free A component is added to the batching barrel, and the solvent-free A material is fully mixed under vacuum degassing conditions to obtain the solvent-free B material; the solvent-free B component is an isocyanate prepolymer formed by partial chain extension of isocyanate and polyether polyol, which is a synthetic reaction. The solvent-free B component in the present invention is mainly a solvent-free B material purchased from a raw material factory, and the two are compounded;

[0027] Step 2: Preparation of waterborne polyurethane resin surface layer 11

[0028] The aromatic polyether resin and the aliphatic polyether resin are compounded in a ratio of 8:2, and the viscosity of the prepared resin is 3000-6000cps;

[0029] Step 3: Production operation process

[0030] (1) coating the surface layer waterborne polyurethane resin in step 2 on plain paper with a certain gap, and drying in an oven to obtain a surface layer;

[0031] (2) adding the solvent-free layer 12 prepared in step 1 to a dry line casting machine, stirring it evenly in the casting machine stirring head, and coating it on the plain paper coated with the surface layer by means of a knife coating method, and after entering the oven, pre-baking for 50-80 seconds, a rapid reaction will occur between the mixed prepolymers of component A and component B, so that the molecular weight of the polymer increases rapidly and the viscosity increases significantly, until the surface changes from a transparent low-viscosity state to a milky white sticky state, and then it is laminated with a mercerized velvet base cloth, and then continues to mature until it is dried;

[0032] (3) The fully matured solvent-free synthetic leather is peeled off from the plain paper and rolled up to obtain a semi-finished product, and then embossed at a temperature of 190-220° C. After embossing, it is compounded with a TC cloth with a thickness of 0.5-0.7 mm to obtain a flame-retardant solvent-free synthetic leather with full and clear lines and patterns and a strong three-dimensional effect.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A water-based, environmentally friendly, solvent-free, flame-retardant synthetic leather, characterized in that: The invention comprises a TC cloth (2) and a solvent-free synthetic leather (1) compounded with the TC cloth (2); the solvent-free synthetic leather (1) comprises a waterborne polyurethane resin surface layer (11), a solvent-free layer (12) and a mercerized velvet base cloth (13).

2. The water-based, environmentally friendly, solvent-free, flame-retardant synthetic leather according to claim 1, characterized in that: The solvent-free layer (12) is composed of a solvent-free A material layer (111) and / or a solvent-free B material layer (112).

3. The water-based, environmentally friendly, solvent-free, flame-retardant synthetic leather according to claim 2, characterized in that: The solvent-free A material layer (111) is polyether polyol.

4. The water-based, environmentally friendly, solvent-free, flame-retardant synthetic leather according to claim 2, characterized in that: The solvent-free B material layer (112) is an isocyanate prepolymer.

5. The water-based, environmentally friendly, solvent-free, flame-retardant synthetic leather according to claim 1, characterized in that: The waterborne polyurethane resin surface layer (11) is a composite of an aromatic polyether resin and an aliphatic polyether resin, and the composite thickness is 8:2.

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