The invention discloses a method for manufacturing foamed synthetic leather based on water-based resin and TPU (Thermoplastic Polyurethane) resin. The manufacturing method comprises the following steps: using water-based polyurethane as a facial layer and a surface treatment layer, using TPU resin as a foaming layer, using a water-based cement as a bonding layer, and obtaining the environment-friendly foamed synthetic leather through a coating transfer process. The method has the advantages that organic pollutants are thoroughly eliminated from the source, organic solvent resources are saved, potential safety hazard is eliminated, and the work environment of workers is improved. The VOC (volatile organic compound) content of a finished leather product is lower than 5 mg/kg. The foamed synthetic leather is ecological environmental friendly and meets European ecological foamed synthetic leather requirements, and the other properties of the leather can also reach or superior to the properties of solvent products.

Method for manufacturing foamed synthetic leather based on water-based resin and TPU (Thermoplastic Polyurethane) resin

The invention discloses environmentally-friendly polyurethane leather. The environmentally-friendly polyurethane leather comprises a microfiber non-woven fabric, a bottom layer covering on the non-woven fabric, as well as a surface layer, a PVC (Polyvinyl Chloride) foaming layer and a water-based adhesive layer which cover the bottom layer. After a polyurethane leather semi-finished product is foamed and embossed, the surface treatment is carried out by adopting a three-edition surface dressing machine, the sizing amount of a water-based surface dressing agent is 40-60g/m , the drying temperature and time are respectively 140-150 DEG C and 60-90 seconds, and the finished product is obtained after a leather blank subjected to surface dressing is subjected to twisting, drying and measuring. The surface layer comprises four layers of coatings, namely an adhesive layer, a first intermediate layer, a second intermediate layer and a surface layer respectively. The environmentally-friendly polyurethane leather is widely applied on shoes, sofa, garments, suitcases, furniture and interior decoration.

Environmentally-friendly polyurethane leather, preparation method and product thereof

The invention discloses a low energy consumption ecological leatheroid preparation method. The preparation method adopts an environmental-friendly plasticizer to replace a phthalate noxious plasticizer to prepare a PVC surface layer and a foam layer, utilizes a low temperature foaming agent with a foaming temperature ranging from 160 DEG C to 190 DEG C to replace the conventional azodicarbonamide (AC) high temperature foaming agent to foam on the foaming layer, and finally uses an environmental-friendly aqueous resin as a base cloth glue and a PVC surface treating agent, as a result, the low energy consumption ecological leatheroid preparation method is obtained. The discharging and residue of the noxious plasticizer and an organic solvent are avoided by using the environmental-friendly plasticizer, as a result, the ecological grade of the finished leatheroid is improved; the application of the low temperature foaming agent can remarkably lower the energy consumption caused by the leatheroid preparation, the production cost is saved, meanwhile, the foam holes are fine and uniform, destructive air holes are avoided, and the color is fleet and weak. By adopting the process, the prepared leatheroid has the characteristics that the cost is low and the content of the volatile organic substance is lower than 5 mg/kg, satisfies quality requirement of EU ecological leatheroid, and remarkably improves the international market competitiveness and the environmental protection grade of the leatheroid.

Low energy consumption ecological leatheroid preparation method

The invention discloses solvent-free synthetic leather and a manufacturing method thereof. The method is characterized by comprising the following steps: firstly, directly coating pretreated base cloth with mixed slurry prepared from solvent-free polyurethane, an assistant and a solvent-free cross-linking agent; solidifying the base cloth coated with mixed slurry through an oven to prepare a semi-finished product; coating release paper with water-based polyurethane as surface resin, and drying and transferring the release paper to the semi-finished product; and carrying out water-based surface treatment to obtain environment-friendly solvent-free synthetic leather. The polyurethane free of a solvent directly coats the base cloth, and is solidified and cross-linked to manufacture the synthetic leather. The technology is small in damage to the release paper, non-toxic, free of pollution, low in energy consumption, low in cost and high in efficiency; traditional solvent-type polyurethane is comprehensively replaced with the solvent-free polyurethane and the water-based polyurethane in combination; the variety, the style and the bandwagon effect of a product are diverse; meanwhile, pollution of an organic solvent is eliminated from the source; the product does not contain VOC; and the ecological grade, the finished product level and the international market competitiveness of the synthetic leather are improved.

Solvent-free synthetic leather and manufacturing method thereof

The invention provides ultra-wear-resistant aqueous coating PVC leather and a processing technology. The leather includes, from bottom to top, a basic fabric, a glue adhesion layer, a PVC foaming layer, a PVC surface layer, a surface treatment layer bottom coating and a surface treatment layer finish coating. The processing technology includes the steps of: preparing materials of the PVC surface layer and the PVC foaming layer, and performing coating, surface treatment and embossing. After MIE abrasion for 2 h, abrasion at a highest point is not more than 5 mm and no abrasion is formed in vertical direction.

Ultra-wear-resistant aqueous coating PVC leather and processing technology

The invention discloses a method for manufacturing environment-friendly semi-polyurethane leather. The method is characterized in that: polyvinyl chloride (PVC) is taken as a foam layer, water-base cement is taken as an adhesive layer, and the environment-friendly semi-polyurethane (PU) leather is prepared by a transfer coating method. Water-borne polyurethane replaces the traditional solvent-type polyurethane to serve as a surface layer, a surface treatment layer and an adhesive layer of the semi-polyurethane leather, organic pollution is eliminated from the source, organic solvent resourcesare saved, potential safety hazards are eliminated, and the working environment of workers is improved. The content of volatile organic compounds (VOC) of the finished leather is less than 5mg/kg (ofleather), the finished leather is eco-friendly and meets the requirement of ecological semi-PU leather, and other performance of the finished leather is equal to or superior to that of a solvent-typeproduct.

Method for manufacturing environment-friendly semi-polyurethane leather

The invention discloses a tanning method based on an amino resin tanning agent generated in situ. The tanning method is characterized in that a leather blank is firstly soaked with organic amine and the like, organic aldehyde is added at appropriate temperature and pH, the organic aldehyde and organic amine molecules are reacted in situ in collagenous fiber to produce a highly active amino resin intermediate, and multi-point covalent cross-linking can be formed between highly active hydroxymethyl on the intermediate and hydroxy and hydroxymethyl in a collagen molecule so as to realize the tanning of leather. Ts of the finished leather is higher than or equal to 90 DEG C, the finished leather has a nearly white appearance and a flat and fine grain surface, and is soft, plump and elastic, and each physical and mechanical index can reach the industrial chrome-free tanning standard. The preparation of the amino resin tanning agent in the method and the tanning process are completed synchronously, the highly active amino resin intermediate generated in situ is reacted with the active group of the collagen on site, and the reaction product is filled in the collagenous fiber, so that the problems in amino resin preparation and stability in storage are solved, the process is simplified, the energy consumption in production is reduced, and the production cost is saved.

Tanning method based on amino resin tanning agent generated in situ

Polyurethane drug release controlling body with thermoswitch and preparation method thereof

The invention discloses a cationic reactive Gemini polyurethane surfactant and a preparation method thereof and belongs to the technical field of fine chemicals. The cationic reactive Gemini polyurethane surfactant is obtained by enabling excess diisocyanate to sequentially react with fatty amine polyoxyethylene ether and a chain extender, further adding a blocking agent to block remaining isocyanate groups, then neutralizing and dispersing in water. A series of surfactants with different performances, uses and unblocking temperatures can be obtained by selecting the types of fatty amine polyoxyethylene ether, the chain extender and the blocking agent. The cationic reactive Gemini polyurethane surfactant disclosed by the invention can solve the problem that the traditional surfactant is easy to migrate and precipitate on the one hand, and improve the compatibility of the cationic reactive Gemini polyurethane surfactant and the traditional surfactant, as well as water resistance, dielectricity, optical transparency and other performances on the other hand; furthermore, the cationic reactive Gemini polyurethane surfactant can realize the effects of strengthening, toughening, reducing surface tension and the like for a matrix, and shows broad application prospects in the fields of preparation of polymer emulsions, finishing of leather and synthetic leather, textile coating and the like.

Cationic reactive Gemini polyurethane surfactant and preparation method thereof

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