High-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture and preparation method thereof
阅读说明：本技术 一种高环保无溶剂沙发家具用聚氨酯合成革及其制备方法 (High-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture and preparation method thereof ) 是由 笪丽红 苏星 胡兆阳 许畅 于 2020-11-03 设计创作，主要内容包括：本发明提出一种高环保无溶剂沙发家具用聚氨酯合成革及其制备方法。使用本发明高环保无溶剂沙发家具用聚氨酯合成革制备方法制得的沙发革产品,耐水解(70℃*95％RH)7周后革面不开裂、不粉化,剥离强度≥30N/3cm(牛顿每3厘米),常温曲挠10万次不开裂,威仕博耐磨10万次革面无破损,且根据ISO16189的检测方法,测试出DMF含量ND(检测限：5ppm),与溶剂型产品相比,本申请产品的生态环保性能不仅体现在产品本身不使用有机溶剂,而且其生产过程低耗能低排放,经过生命周期LCA碳足迹认证,与同规格的溶剂型产品相比,项目产品温室气体排放量(以CO2计)降低了47.37％。(The invention provides a high-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture and a preparation method thereof. The sofa leather product prepared by the preparation method of the polyurethane synthetic leather for the high-environment-friendly solvent-free sofa furniture has the advantages that the leather surface is not cracked or pulverized after being subjected to hydrolysis resistance (70 ℃ C. 95% RH) for 7 weeks, the peel strength is not less than 30N/3cm (Newton per 3 cm), the leather surface is not cracked after being bent for 10 ten thousand times at normal temperature, the Weishibo is wear-resistant, the leather surface is not damaged, the DMF content ND (detection limit: 5ppm) is tested according to the detection method of ISO16189, compared with a solvent-based product, the ecological environment-friendly performance of the product is not only reflected in that the product does not use an organic solvent, but also the production process has low energy consumption and low emission, and the life cycle LCA carbon footprint is certified, and compared with a solvent-based product with the same specification, the greenhouse gas emission (calculated by CO 2) of the project.)
1. The high-environment-friendly solvent-free polyurethane synthetic leather for the sofa furniture is characterized by comprising a base cloth layer and a solvent-free layer;
the solvent-free layer is formed by mixing a polyether type combined material A and a polyether type material B prepolymer according to a mass ratio of 100:62 are mixed together.
2. The high-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture according to claim 1, wherein the preparation raw materials of the polyether type composition A material comprise the following components in parts by weight: 70-80 parts of polyether type combined A material stock solution, 10-15 parts of calcium carbonate, 10-15 parts of color paste and 0.05-0.1 part of catalyst.
3. The high-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture according to claim 2, wherein the catalyst is an amine and metal composite catalyst.
4. The high-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture according to claim 1, wherein the thickness of the base fabric layer is 0.70 ± 0.05 mm.
5. The polyurethane synthetic leather for the sofa furniture in the environment-friendly and solvent-free manner as claimed in claim 4, wherein the base fabric layer comprises 75% of polyester and 25% of cotton.
6. The preparation method of the polyurethane synthetic leather for the high-environmental-protection solvent-free sofa furniture, which is described in any one of claims 1 to 5, is characterized by comprising the following steps:
step a, coating the surface of release paper with solvent-free layer slurry formed by mixing polyether type combination material A and polyether type material B prepolymer, and drying to form a solvent-free layer;
and b, laminating the base cloth layer and the solvent-free layer through a laminating roller, sending the laminated product of the base cloth layer and the solvent-free layer into an oven for curing after the lamination is finished, cooling after the curing, and peeling off the release paper to obtain a finished product of the polyurethane synthetic leather.
7. The method for preparing polyurethane synthetic leather for sofa furniture in high environmental protection and solvent-free according to claim 6, wherein in step a, the solvent-free layer slurry is coated in a thickness range of 0.30-0.35 mm; the drying condition is drying for 1-2 min at 100-120 ℃.
8. The preparation method of the polyurethane synthetic leather for the high-environment-friendly solvent-free sofa furniture as claimed in claim 6, wherein the oven curing condition in the step b is oven curing at 130-140 ℃ for 8-10 min.
9. The preparation method of the polyurethane synthetic leather for the high-environmental-protection solvent-free sofa furniture, according to claim 6, wherein the solvent-free layer is thermosetting two-component polyether type solvent-free foamed polyurethane resin.
10. The method for preparing polyurethane synthetic leather for sofa furniture in high environmental protection and solvent free according to claim 6, wherein the laminating gap between the laminating roller and the release paper during laminating in step b is in the range of 0.55-0.65 mm.
Technical Field
The invention belongs to the field of high polymer materials, and particularly relates to high-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture and a preparation method thereof.
Background
The traditional polyurethane synthetic leather for sofa furniture is mainly divided into a dry product and a wet product according to a processing mode, and is prepared by processing polyurethane resin with solid content of 20-40% by taking N, N-Dimethylformamide (DMF), butanone (MEK), Toluene (TOL) and the like as organic solvents. Moreover, as a household product, people have a long contact time every day, and the residual solvent is harmful to people. With the strictness of national environmental protection policies and the increasing enhancement of environmental protection consciousness of people, polyurethane synthetic leather tends to move towards a clean production process with low emission and zero pollution, and the development of environment-friendly sofa furniture leather products tends to be great.
The synthetic leather product for the sofa furniture, which is prepared by the one-knife-pasting solvent-free foaming pasting process, has the characteristics of soft hand feeling, excellent wear resistance and scratch resistance, environmental friendliness, low carbon footprint and the like.
Disclosure of Invention
Aiming at the problems, the invention provides high-environment-friendly solvent-free polyurethane synthetic leather for sofa furniture, which comprises a base cloth layer and a solvent-free layer;
the solvent-free layer is formed by mixing a polyether type combined material A and a polyether type material B prepolymer according to a mass ratio of 100:62 are mixed together.
Further, the preparation raw materials of the polyether type composite material A comprise the following components in parts by mass: 70-80 parts of polyether type combined A material stock solution, 10-15 parts of calcium carbonate, 10-15 parts of color paste and 0.05-0.1 part of catalyst.
Further, the catalyst is an amine and metal composite catalyst.
Further, the thickness of the base fabric layer is 0.70 +/-0.05 mm.
Further, the fiber proportion of the base cloth layer is 75% of polyester and 25% of cotton.
The invention also provides a preparation method of the polyurethane synthetic leather for the high-environment-friendly solvent-free sofa furniture, which comprises the following steps:
step a, coating the surface of release paper with solvent-free layer slurry formed by mixing polyether type combination material A and polyether type material B prepolymer, and drying to form a solvent-free layer;
and b, laminating the base cloth layer and the solvent-free layer through a laminating roller, sending the laminated product of the base cloth layer and the solvent-free layer into an oven for curing after the lamination is finished, cooling after the curing, and peeling off the release paper to obtain the finished product of the polyurethane synthetic leather.
Further, in the step a, the coating thickness of the solvent-free layer slurry is in the range of 0.30-0.35 mm; the drying condition is drying for 1-2 min at 100-120 ℃.
Further, the curing condition of the oven in the step b is oven curing at 130-140 ℃ for 8-10 min.
Further, the solvent-free layer is thermosetting two-component polyether type solvent-free foaming polyurethane resin.
Further, when laminating is carried out in the step b, the laminating gap between the laminating roller and the release paper ranges from 0.55mm to 0.65 mm.
The solvent-free one-cut-pasted bi-component polyurethane resin selected by the invention can be directly coated and scraped on release paper through an AB material mixed coating head, can be used as an adhesive layer in a semi-dry state, can be immediately stripped after being cured for 8-10 minutes after a base fabric is pasted with the base fabric, and has the advantages of low production energy consumption and simple process route. The sofa furniture leather product prepared by using the method has the advantages that the leather surface is not cracked or pulverized after hydrolysis resistance (70 ℃ C. 95% RH) for 7 weeks, the peel strength is not less than 30N/3cm, the leather surface is not cracked after being flexed for 10 ten thousand times at normal temperature, the Weishibo is wear-resistant and has no crack, and the DMF content ND (detection limit: 5ppm) is tested according to the detection method of ISO 16189. Compared with solvent type products, the product has the advantages of ecological environmental protection performanceAt present, the product does not use organic solvent, the production process is low in energy consumption and emission, and the greenhouse gas emission (in CO) of the project product is compared with the solvent-based product with the same specification through the life cycle LCA carbon footprint certification2Calculated) was reduced by 47.37%.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of polyurethane synthetic leather for high-environmental-protection solvent-free sofa furniture in the embodiment of the invention.
1-a base fabric layer; 2-solvent free layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a high-environment-friendly solvent-free polyurethane synthetic leather for sofa furniture, which comprises a base cloth layer and a solvent-free layer, wherein the solvent-free layer is formed by mixing polyether type combined material A and polyether type material B prepolymer according to a mass ratio of 100/62.
The polyurethane synthetic leather is formed by directly attaching solvent-free bi-component polyurethane resin to a base cloth layer, and is a one-step-attaching solvent-free foaming and attaching process, wherein the solvent-free bi-component polyurethane resin is a polyether type combined material A and a polyether type material B prepolymer according to the mass ratio of 100:62, which is a surface layer and an adhesive layer.
Illustratively, the preparation raw materials of the polyether type composite material A comprise the following components in parts by weight: 70-80 parts of polyether type combined A material stock solution, 10-15 parts of calcium carbonate, 10-15 parts of color paste and 0.05-0.1 part of catalyst.
Illustratively, the stock solution of the polyether type composition A is a stock solution of a polyether type hydroxyl component A, the prepolymer of the polyether type B is a polyether type isocyanate component B, and the stock solution of the polyether type hydroxyl component A and the polyether type isocyanate component B are respectively AL-2110A and AL-3055B produced by New polyurethane Material Co.
Illustratively, the catalyst is an amine and metal hybrid catalyst (694590C-CC) from Pasteur; calcium carbonate acts as a filler to support in the coating; the catalyst acts to accelerate the cure crosslinking.
Illustratively, the base fabric layer is a Hubei Jinfuxiang 0.7mm renewable woven fabric, and the thickness is as follows: 0.70 ± 0.05mm, gram weight: 220 +/-10 g/m2The fiber proportion of the base cloth layer is 75% of terylene and 25% of cotton, wherein the terylene can pass GRS certification and is a recyclable material.
The invention provides a preparation method of high-environment-friendly solvent-free polyurethane synthetic leather for sofa furniture, which completely does not use a solvent in the manufacturing process, has green and environment-friendly production process, can be processed and molded at one time, does not need paper-carrying curing for leather samples, and has high production efficiency.
A preparation method of high-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture comprises the following steps:
step a, coating the surface of release paper with solvent-free layer slurry formed by mixing polyether type combination material A and polyether type material B prepolymer, and drying to form a solvent-free layer; the solvent-free layer is thermosetting double-component polyether type solvent-free foaming polyurethane resin;
the polyether type composite material A comprises the following raw materials in parts by weight: 70-80 parts of polyether type combined A material stock solution, 10-15 parts of calcium carbonate, 10-15 parts of color paste and 0.05-0.1 part of catalyst; the polyether type combination A material stock solution is polyether type hydroxyl component A material stock solution, and the polyether type B material prepolymer is polyether type isocyanate component B;
the coating thickness of the solvent-free layer slurry is 0.30-0.35 mm; the drying condition is drying for 1-2 min at 100-120 ℃;
b, laminating the base cloth layer with the thickness of 0.70 +/-0.05 mm with the solvent-free layer through a laminating roller, feeding the laminated body of the base cloth layer and the solvent-free layer into an oven for curing after the lamination is finished, cooling after the curing, and peeling off release paper to obtain a finished product of the polyurethane synthetic leather;
the curing condition of the oven is that the oven is cured for 8-10min at the temperature of 130-140 ℃; the lamination gap between the laminating roller and the release paper is 0.55-0.65 mm.
Illustratively, in order to ensure the hand feeling of the finished polyurethane synthetic leather product, the lamination gap between the laminating roller and the release paper is 0.55-0.65 mm.
The present invention is further illustrated by the following specific examples, but it should be noted that the specific material ratios, process conditions, results, etc. described in the examples of the present invention are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Example one
A preparation method of high-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture comprises the following steps:
step a, coating the surface of release paper with solvent-free layer slurry formed by mixing polyether type combination material A and polyether type material B prepolymer, and drying to form a solvent-free layer; the solvent-free layer is thermosetting two-component polyether type solvent-free foaming polyurethane resin, and the proportion of the two-component polyether type solvent-free foaming polyurethane resin AL-2110A to AL-3055B is as follows: 100: 62;
the polyether type composite material A comprises the following raw materials in parts by weight: 70 parts of AL-2110A stock solution, 15 parts of calcium carbonate, 15 parts of color paste and 0.08 part of catalyst (694590C-CC);
the coating thickness of the solvent-free layer slurry is 0.30 mm; drying for 2min under the drying condition of 100 ℃;
b, laminating the base cloth layer with the thickness of 0.70mm and the solvent-free layer through a laminating roller, sending the laminated product of the base cloth layer and the solvent-free layer into an oven for curing after the lamination is finished, cooling after the curing, and peeling the release paper to obtain a finished product of the polyurethane synthetic leather;
oven curing condition is oven curing at 140 deg.C for 8 min; the lamination gap between the laminating roller and the release paper was 0.55 mm.
Example two
A preparation method of high-environmental-protection solvent-free polyurethane synthetic leather for sofa furniture comprises the following steps:
step a, coating the surface of release paper with solvent-free layer slurry formed by mixing polyether type combination material A and polyether type material B prepolymer, and drying to form a solvent-free layer; the solvent-free layer is thermosetting two-component polyether type solvent-free foaming polyurethane resin, and the proportion of the two-component polyether type solvent-free foaming polyurethane resin AL-2110A to AL-3055B is as follows: 100: 62;
the polyether type composite material A comprises the following raw materials in parts by weight: 75 parts of AL-2110A stock solution, 10 parts of calcium carbonate, 15 parts of color paste and 0.1 part of catalyst (694590C-CC);
the coating thickness of the solvent-free layer slurry is 0.35 mm; drying for 2min under the drying condition of 110 ℃;
b, laminating the base cloth layer with the thickness of 0.70mm and the solvent-free layer through a laminating roller, sending the laminated product of the base cloth layer and the solvent-free layer into an oven for curing after the lamination is finished, cooling after the curing, and peeling the release paper to obtain a finished product of the polyurethane synthetic leather;
the curing condition of the oven is that the oven is cured for 10min at 135 ℃; the lamination gap between the lamination roller and the release paper was 0.65 mm.
Relevant features of both embodiments are as follows:
the sofa leather product prepared by the preparation method of the polyurethane synthetic leather for the high-environment-friendly solvent-free sofa furniture has the advantages that the leather surface is not cracked or pulverized after being subjected to hydrolysis resistance (70 ℃ C. 95% RH) for 7 weeks, the peel strength is not less than 30N/3cm (Newton per 3 cm), the leather surface is not cracked after being bent for 10 ten thousand times at normal temperature, the Weishibo is wear-resistant, the leather surface is not damaged, the DMF content ND (detection limit: 5ppm) is tested according to the detection method of ISO16189, compared with a solvent-based product, the ecological environment-friendly performance of the product is not only reflected in that the product does not use an organic solvent, but also the production process has low energy consumption and low emission, and the life cycle LCA carbon footprint is certified, and compared with a solvent-based product with the same specification, the greenhouse gas emission (calculated by CO 2) of the project.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.