CN110747655A - Solvent-free polyurethane environment-friendly material for basketball and preparation method thereof - Google Patents
Solvent-free polyurethane environment-friendly material for basketball and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a solvent-free polyurethane environment-friendly material for basketball, which sequentially comprises a base material layer, a compact layer, a solvent-free foam hole layer and a slip-resistant surface layer, wherein the base material layer is composed of superfine fiber cloth bases, the solvent-free foam hole layer is composed of solvent-free slurry, and the slip-resistant surface layer is composed of the dense layer and the slip-resistant surface layer, and the compact layer is formed by coating and coating the slurry on the surface layer of the superfine fiber cloth bases by adopting a reverse roll process. Coating and coating slurry on the surface layer of the superfine fiber cloth base through a reverse roll process to form a compact layer, improving the binding property of the cloth base, and then forming a foam hole layer on the compact layer by matching with a solvent-free foaming process to obtain the basketball made of the synthetic material, wherein the basketball has the advantages of good rebound resilience, very strong impact resistance and long service life.
Description
Technical Field
The invention belongs to the field of synthetic leather materials, and particularly relates to a solvent-free polyurethane environment-friendly material for basketball and a preparation method thereof.
Background
Basketball is the most popular sport in the world at present and is popular among the masses. Basketball is an indispensable part of basketball sports, and the material and the materials adopted by the basketball are different according to different fields and requirements.
The main materials of basketball are buffalo hide, synthetic rubber and synthetic leather. The basketball made of the cattle hide is natural, emphasizes the hand feeling of ball control, is not sticky when the skin is astringent in sweat, has soft and moderate bounce degree, is easy to control, but has poor wear resistance and water resistance, is generally suitable for indoor places, and is also the material of most formal sports balls at present; the synthetic rubber has the characteristics of simple process and low cost, but is not generally used as a game ball, the synthetic rubber is also divided into common rubber and foamed rubber, the common rubber ball has the advantages of durability and water resistance, the surface of the basketball made of the material is smooth, the basketball is generally used for cement grounds in an outfield and the like, and the foamed rubber and the common rubber have toughness on the surface and more comfortable hand feeling, but are easy to be stained with ash when being used in the outfield, and are more suitable for fancy basketballs such as street balls and the like. Besides the two types, synthetic leather is generally applied in the market.
At present, most of basketball leather in the market is mainly PVC basketball leather, PU basketball leather and microfiber basketball leather, and the PVC basketball leather is low in cost and poor in environmental protection performance; the PU basketball leather is the most used material in the synthetic leather, has the advantages of water resistance and wear resistance, can be used indoors and outdoors, but has poor impact resistance due to the limitation of the material, and the service life of the manufactured basketball is relatively short; the superfine fiber basketball leather is soft in hand feeling and good in elasticity, is a high-grade basketball leather material, but due to the fact that manufacturing difficulty is high, the superfine fiber basketball leather in the market at present is mainly formed by coating a PU (polyurethane) material on the surface of superfine fibers, and the basketball leather manufactured by the method still cannot overcome the defects that the hitting resistance performance is poor, the service life of a manufactured basketball is short and the like.
Disclosure of Invention
In view of the above, the present invention provides a solvent-free polyurethane environment-friendly material for basketball and a preparation method thereof, in which a superfine fiber cloth base is used as a base material, a dense layer is formed by a reverse roller decoration process to obtain a superfine fiber bass, and the superfine fiber bass is combined with a solvent-free foaming and laminating process, so that the surface of the superfine fiber bass is very dense, and a foam layer formed by a solvent-free foaming process solves the technical problems of poor anti-impact performance and short service life of the existing synthetic basketball.
In order to achieve the purpose, the invention adopts the following technical scheme:
the solvent-free polyurethane environment-friendly material for the basketball consists of a base material layer, a compact layer, a solvent-free foam hole layer and a slip-resistant surface layer, wherein the base material layer consists of superfine fiber cloth bases, the solvent-free foam hole layer consists of solvent-free slurry, and the slip-resistant surface layer consists of the solvent-free foam hole layer and the slip-resistant surface layer in sequence, and the compact layer is formed by coating and coating the slurry on the surface layer of the superfine fiber cloth bases by adopting a. The invention relates to a method for manufacturing basketball leather by using superfine fiber cloth base, which is characterized in that a layer of wet-process foam pore layer is coated on the surface of superfine fiber to manufacture the basketball leather, but the wet-process foam pore layer is poor in binding property with the superfine fiber cloth base, the pore layer is low in strength, and the service life of a material is short.
Further, the coating slurry comprises 150 parts by weight of 100-150 parts of high-solid polyurethane resin, 150 parts by weight of 100-150 parts of butanone and 10-50 parts by weight of filler, wherein the solid content of the high-solid polyurethane resin is 30% -60%, and the filler is at least one of aluminum hydroxide or calcium carbonate; the substrate layer and the compact layer jointly form an ultrafine fiber base, and the thickness of the ultrafine fiber base is 1.0-2.0 mm. The compact layer in the invention adopts polyurethane with high solid content, thus being beneficial to forming a thicker compact layer, having good bonding performance and being well combined with the superfine fiber cloth base. And the compact layer in the invention is coated by adopting a reverse roller process, so that on one hand, the burst of the slurry can be increased to the maximum extent, and on the other hand, the reverse roller process has a mutual extrusion process with the superfine fiber cloth base in the coating process, so that the slurry can better permeate into the superfine fiber cloth base, and the bonding strength is further increased. Meanwhile, the thickness of the superfine fiber bass is preferably selected in the invention, because the mechanical properties of the whole material, such as tearing strength, breaking strength and the like, are influenced by the thinness of the superfine fiber bass, and the post-processing is not facilitated by the overlarge thickness of the superfine fiber bass.
The invention provides a preparation method of the solvent-free polyurethane environment-friendly material for basketball, which comprises the following steps:
s1, coating the coating slurry on the surface of the superfine fiber cloth base by adopting a reverse roll process to form superfine fiber bass;
s2, coating the dry-process surface layer polyurethane slurry on release paper, drying to obtain a dry-process surface layer, coating the dry-process surface layer with the two-blade polyurethane slurry, and drying to obtain a dry-process surface layer membrane;
s3, mixing the solvent-free slurry, coating the mixture on the dry-method surface layer membrane, preheating, attaching the preheated mixture to the superfine fiber base, drying, cooling and stripping to obtain the solvent-free superfine fiber synthetic leather;
s4, preheating the solvent-free superfine fiber synthetic leather, embossing, and finally coating an anti-slip layer.
Further, in step S1, the viscosity of the coating slurry is 1000-3000cps, and the slurry temperature is 20-30 ℃;
the parameters of the reverse roll process are as follows: the number of the reverse rollers is 70-200 meshes, the speed of the main engine is 10-20m/min, and the ratio of the speed of the main engine to the rotating speed of the reverse rollers is 1:1-1: 3. In order to ensure the optimal effect of the dense layer formation in the invention, the parameters of the coating slurry and the processing parameters of the reverse roller process are optimized.
Further, in step S2, the dry-process surface layer polyurethane slurry is prepared by mixing 100 and 200 parts of surface layer polyurethane resin, 50 to 100 parts of methyl formamide, 0.5 to 3 parts of flatting agent and 3 to 10 parts of color paste according to parts by weight; the dry-process top layer polyurethane resin is a polyurethane resin conventionally used by those skilled in the art, and can be prepared by itself or can be directly purchased in the market, and therefore, the dry-process top layer polyurethane resin is not particularly limited.
The viscosity of the dry method surface layer polyurethane slurry is 1500-3500cps, the temperature is 20-30 ℃, and the knife coating thickness is 10-25 filaments; the speed is 5-20m/min, the drying temperature is 100-. In order to ensure the best performance of the final material, the parameters of the dry-process surface layer polyurethane slurry and the processing parameters are optimized.
Further, in step S2, the polyurethane slurry is prepared by mixing 100-200 parts of polyurethane resin, 50-100 parts of methyl formamide, 0.5-3 parts of leveling agent and 3-10 parts of color paste by weight;
the viscosity of the two-knife polyurethane slurry is 1500-3500cps, the temperature is 20-30 ℃, the knife coating thickness is 10-25 filaments, the speed is 5-20m/min, the drying temperature is 100-150 ℃, the time is 1-5min, the length of the second oven is 5-20m, and the blowing speed of the second oven is 200-800 r/min.
Further, in step S3, the solvent-free slurry is prepared by mixing 100-; the polyol A material and the isocyanic acid B material are A, B material combinations which are commonly used by the technicians in the field, can be prepared by themselves or can be directly purchased from the market, and are not specifically explained here; the catalyst can be NX-128 or other organic tin catalysts; the filler may be aluminum hydroxide, calcium carbonate or a combination thereof, and the selection of the catalyst and the filler is conventional in the art, and therefore, is not limited herein.
The viscosity of the solvent-free slurry is 1000-4000cps, the temperature is 20-30 ℃, the knife coating thickness is 20-50 filaments, the vehicle speed is 5-20m/min, the preheating temperature is 70-100 ℃, the time is 1-3min, the length of a third oven is 5-10m, and the blast speed of the third oven is 200-800 r/min;
the drying is carried out at the temperature of 110-;
further, in step S3, the attached laminate is 60-140 filaments.
Further, in step S4, the preheating roller is used for preheating, the temperature of the preheating roller is 100-150 ℃, the embossing is performed by using an embossing roller, the temperature of the embossing roller is 160-230 ℃, the speed is 1-5m/min, and the pressure is 3-8 MPa.
Further, in step S4, the slip-resistant layer is made of slip-resistant slurry, the slip-resistant slurry is prepared by mixing 50-100 parts of polyurethane resin, 50-100 parts of rosin resin and 200-300 parts of butanone according to parts by weight, a coating roller for coating is 70-200 meshes, the vehicle speed is 10-30m/min, the oven temperature is 70-130 ℃, and the blowing speed is 500-1000 r/min.
Compared with the prior art, the invention has the following beneficial effects:
1. the superfine fiber cloth base is used as a base material layer, and the superfine fiber cloth base has the appearance effect close to that of genuine leather, soft hand feeling, good rebound resilience and higher mechanical performance.
2. Coating and coating the slurry on the surface layer of the superfine fiber cloth base by a reverse roll process, wherein a very uniform and thick coating layer can be formed on the surface of the cloth base after coating by the reverse roll process, and the coating layer is very compact because the coating layer is not foamed, and the bonding strength of the coating layer and the cloth base is very high; then, a solvent-free foaming process is matched to form a foam hole layer on the compact layer, and the solvent-free foaming process is a process of cross-linking reaction of the material A and the material B, so that the formed foam hole layer has high strength and good elasticity; the process is matched, and the basketball made of the synthetic material has very strong anti-hitting capacity and long service life.
3. Because the veneering adopts the solvent-free foaming process, and the solvent-free A, B double-component crosslinking curing, the hydrolysis resistance of the invention is qualitatively improved compared with that of the common basketball leather.
4. The solvent-free slurry used in the invention does not contain toxic and harmful solvents such as methylformamide, toluene and the like, so that the prepared material has excellent environmental protection performance.
Drawings
Fig. 1 is a schematic structural view of a solvent-free polyurethane environment-friendly material for basketball manufactured in a preferred embodiment of the invention.
In the figure: 1-anti-slip layer, 2-solvent-free foam hole layer, 3-compact layer and 4-superfine fiber cloth base layer.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the specific embodiments illustrated. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in figure 1, the solvent-free polyurethane environment-friendly material for basketball in the invention is composed of a slip-resistant layer 1, a solvent-free foam pore layer 2, a compact layer 3 and an ultrafine fiber cloth base layer 4. Unless otherwise specified, the parts in the following examples and comparative examples are parts by weight, and the codes of the ultrafine fiber cloth bases used in the following examples and comparative examples are: HFXM9-14050, DMF is a product of Tantaowwawa company in China, color paste is purchased from Technology ltd, Taiwan blue, Zhejiang, LT-80, SA-36, LT-7110, LT-8441, LA-7020, AL-3081A, AL-2008B are all products of synthetic fertilizer polyurethane new materials ltd, DS-300T is purchased from Dekkaido Corp, DS-A190 is purchased from Shanghai Dorsen chemical engineering ltd, and the rest are all products sold in the market.
Comparative example 1
S1, uniformly coating the coating slurry on the surface layer of the superfine fiber cloth base through a reverse roller machine (the number of reverse rollers is 70 meshes, the speed of a main engine is 15m/min, and the ratio of the speed of the main engine to the speed of the reverse rollers is 1:2) to form the superfine fiber Bass with high surface density and good flatness, wherein the viscosity of the coating slurry is 2000cps, the temperature is 25 ℃, and the coating slurry is prepared by mixing 120 parts of high-solid-content polyurethane resin DS-A190, 120 parts of butanone and 20 parts of calcium carbonate;
s2, uniformly coating the dry-process surface layer polyurethane slurry (the thickness of knife coating is 15 threads) on release paper, and drying at 110 ℃ for 1.5min (the speed is 10m/min, the length of an oven is 15m, and the blast speed in the oven is 500 r/min); coating the two-blade polyurethane slurry (with the blade coating thickness of 15 wires) on release paper, and drying at 110 ℃ for 1.5min (the length of an oven is 15 meters, and the blowing speed in the oven is 600r/min) to obtain a dry-process surface layer membrane, wherein the viscosity of the dry-process surface layer polyurethane slurry is 2500cps, the temperature is 25 ℃, and the dry-process surface layer membrane is prepared by mixing 120 parts of surface layer polyurethane resin LT-80, 60 parts of methyl formyl, 0.5 part of flatting agent LT-7110 and 6 parts of color paste; the two-blade polyurethane slurry has the viscosity of 2500cps and the temperature of 25 ℃, and is prepared by mixing 120 parts of two-blade polyurethane resin LT-8441, 60 parts of methyl formamide, 0.5 part of flatting agent LT-7110 and 8 parts of color paste;
s3, uniformly coating the adhesive layer slurry (with the thickness of 35 wires by a knife) on a dry surface layer membrane, preheating at 80 ℃ for 1.2min (the length of an oven is 12 meters, and the blowing speed in the oven is 300r/min), after the optimal bonding state is achieved, immediately extruding the adhesive layer slurry and the superfine fiber bottom layer obtained in the step S1 together by a bonding roller (the bonding layer is 120 wires, the thickness of the used superfine fiber is 1.45mm), fully reacting in the oven at 130 ℃ for 6 min (the length of the oven is 60 meters, and the blowing speed in the oven is 800r/min), and finally cooling by a cooling roller, and separating the superfine fiber synthetic leather from release paper, wherein the viscosity of the adhesive layer slurry is 3000cps, the temperature is 25 ℃, and the adhesive layer slurry is prepared by mixing 120 parts of adhesive layer resin SA-36 and 60 parts of methyl formamide.
S4, forming basketball grains on the surface of the superfine fiber synthetic leather in the step S3 in a pattern embossing roller transfer mode, wherein the temperature of the embossing roller is 215 ℃, the vehicle speed is 2m/min, the pressure is 6MPa, and the temperature of the preheating roller is 130 ℃; coating a layer of slip-resistant coating with very strong slip feeling on the surface of embossed solvent-free superfine fiber synthetic leather in a roller coating mode (a coating roller is 100 meshes, the speed is 20m/min, the temperature of an oven is 100 ℃, and the blowing speed of the oven is 800r/min), wherein the slip-resistant slurry of the slip-resistant coating is prepared by mixing 100 parts of polyurethane resin LA-7020, 100 parts of rosin resin DS-300T and 200 parts of butanone.
Comparative example 2
S1, uniformly coating the dry-process surface layer polyurethane slurry (the thickness of knife coating is 15 threads) on release paper, and drying at 110 ℃ for 1.5min (the speed is 10m/min, the length of an oven is 15m, and the blast speed in the oven is 500 r/min); coating the two-blade polyurethane slurry (with the blade coating thickness of 15 wires) on release paper, and drying at 110 ℃ for 1.5min (the length of an oven is 15 meters, and the blowing speed in the oven is 600r/min) to obtain a dry-process surface layer membrane, wherein the viscosity of the dry-process surface layer polyurethane slurry is 2500cps, the temperature is 25 ℃, and the dry-process surface layer membrane is prepared by mixing 120 parts of surface layer polyurethane resin LT-80, 60 parts of methyl formyl, 0.5 part of flatting agent LT-7110 and 6 parts of color paste; the two-blade polyurethane slurry has the viscosity of 2500cps and the temperature of 25 ℃, and is prepared by mixing 120 parts of two-blade polyurethane resin LT-8441, 60 parts of methyl formamide, 0.5 part of flatting agent LT-7110 and 8 parts of color paste;
s2, uniformly coating the adhesive layer slurry (with the thickness of 35 wires by a knife) on a dry surface layer membrane, preheating at 80 ℃ for 1.2min (the length of an oven is 12 meters, and the blowing speed in the oven is 300r/min), after the optimal bonding state is achieved, immediately extruding the adhesive layer slurry and a superfine fiber cloth base together through a bonding roller (the bonding layer is 120 wires, the used superfine fiber Beth thickness is 1.4mm), fully reacting in an oven at 130 ℃ for 6 min (the length of the oven is 60 meters, and the blowing speed in the oven is 800r/min), and finally cooling through a cooling roller, separating the superfine fiber synthetic leather from release paper, wherein the viscosity of the adhesive layer slurry is 3000cps, the temperature is 25 ℃, and the adhesive layer slurry is prepared by mixing 120 parts of adhesive layer resin SA-36 and 60 parts of methyl formamide.
S3, forming basketball grains on the surface of the superfine fiber synthetic leather in the step S2 in a pattern embossing roller transfer mode, wherein the temperature of the embossing roller is 215 ℃, the vehicle speed is 2m/min, the pressure is 6MPa, and the temperature of the preheating roller is 130 ℃; coating a layer of slip-resistant coating with very strong slip feeling on the surface of embossed solvent-free superfine fiber synthetic leather in a roller coating mode (a coating roller is 100 meshes, the speed is 20m/min, the temperature of an oven is 100 ℃, and the blowing speed of the oven is 800r/min), wherein the slip-resistant slurry of the slip-resistant coating is prepared by mixing 100 parts of polyurethane resin LA-7020, 100 parts of rosin resin DS-300T and 200 parts of butanone.
Comparative example 3
The adhesive layer slurry of example 2 was replaced with a solvent-free slurry prepared by mixing 100 parts of polyol a stock AL-3081A, 138 parts of isocyanate B stock AL-2008B, 0.1 part of catalyst NX-128 and 100 parts of aluminum hydroxide, and the other preparation processes were the same as example 2.
Example 1
The adhesive layer paste of comparative example 1 was replaced with a solvent-free paste prepared by mixing 100 parts of polyol a paste AL-3081A, 138 parts of isocyanate B paste AL-2008B, 0.1 part of catalyst NX-128 and 100 parts of aluminum hydroxide, and the other preparation process was the same as in example 1.
Example 2
S1, uniformly coating the coating slurry on the surface layer of the superfine fiber cloth base through a reverse roller machine (the number of reverse rollers is 200 meshes, the speed of a main engine is 10m/min, and the ratio of the speed of the main engine to the speed of the reverse rollers is 1:1) to form a superfine fiber bottom layer with high surface density and good flatness, wherein the viscosity of the coating slurry is 1000cps, the temperature is 20 ℃, and the coating slurry is prepared by mixing 150 parts of high-solid-content polyurethane resin DS-A190, 100 parts of butanone and 10 parts of calcium carbonate;
s2, uniformly coating the dry-process surface layer polyurethane slurry (the thickness of knife coating is 10 threads) on release paper, and drying at 100 ℃ for 5min (the speed is 5m/min, the length of an oven is 5m, and the blast speed in the oven is 500 r/min); coating a second-blade polyurethane slurry (with a blade coating thickness of 10 filaments) on release paper, and drying at 100 ℃ for 5min (the length of an oven is 5m, and the blowing speed in the oven is 200r/min) to obtain a dry-process surface layer membrane, wherein the viscosity of the dry-process surface layer polyurethane slurry is 1500cps, the temperature is 20 ℃, and the dry-process surface layer membrane is prepared by mixing 100 parts of surface layer polyurethane resin LT-80, 100 parts of methyl formyl, 2 parts of flatting agent LT-7110 and 6 parts of color paste; the two-blade polyurethane slurry has the viscosity of 1500cps and the temperature of 20 ℃, and is prepared by mixing 100 parts of two-blade polyurethane resin LT-8441, 100 parts of methyl formamide, 2 parts of flatting agent LT-7110 and 10 parts of color paste;
s3, uniformly coating the solvent-free slurry (with the thickness of 20 wires) on a dry-method surface layer membrane after mixing, preheating for 3min at 70 ℃ (the length of an oven is 5m, and the blast speed in the oven is 200r/min), after reaching the optimal bonding state, the obtained superfine fiber base layer and the superfine fiber base layer obtained in the step S1 are immediately extruded together through a laminating roller (the laminating layer is 120 threads, the used superfine fiber Beth thickness is 1.45mm) and then fully reacted in an oven at 110 ℃ for 10 minutes (the length of the oven is 30 meters, the blast speed in the oven is 500r/min), finally the solvent-free superfine fiber synthetic leather is separated from release paper after being cooled by a cooling roller, wherein the viscosity of the solvent-free slurry is 1000cps, the temperature is 20 ℃, and the solvent-free slurry is prepared by mixing 150 parts of polyol A material AL-3081A, 200 parts of isocyanic acid B material AL-2008B, 0.05 part of catalyst NX-128 and 150 parts of aluminum hydroxide.
S4, forming basketball grains on the surface of the solvent-free superfine fiber synthetic leather in the step S3 in a pattern embossing roller transfer mode, wherein the temperature of the embossing roller is 160 ℃, the vehicle speed is 1m/min, the pressure is 3MPa, and the temperature of the preheating roller is 100 ℃; coating a layer of slip-resistant coating with very strong slip feeling on the surface of embossed solvent-free superfine fiber synthetic leather in a roller coating mode (a coating roller is 70 meshes, the vehicle speed is 10m/min, the oven temperature is 70 ℃, and the air blowing speed of the oven is 500r/min), wherein the slip-resistant slurry of the slip-resistant coating is prepared by mixing 50 parts of polyurethane resin LA-7020, 50 parts of rosin resin DS-300T and 500 parts of butanone.
Example 3
S1, uniformly coating the coating slurry on the surface layer of the superfine fiber cloth base through a reverse roller machine (the number of reverse rollers is 100 meshes, the speed of a main engine is 20m/min, and the ratio of the speed of the main engine to the speed of the reverse rollers is 1:3) to form a superfine fiber bottom layer with high surface density and good flatness, wherein the viscosity of the coating slurry is 3000cps, the temperature is 30 ℃, and the coating slurry is prepared by mixing 100 parts of high-solid-content polyurethane resin DS-A190, 150 parts of butanone and 50 parts of calcium carbonate;
s2, uniformly coating the dry-process surface layer polyurethane slurry (the thickness of knife coating is 25 filaments) on release paper, and drying at 150 ℃ for 1min (the speed is 20m/min, the length of an oven is 20m, and the blast speed in the oven is 800 r/min); coating a second-blade polyurethane slurry (with a blade coating thickness of 25 filaments) on release paper, and drying at 150 ℃ for 1min (the length of an oven is 20m, and the blowing speed in the oven is 800r/min) to obtain a dry-process surface layer membrane, wherein the viscosity of the dry-process surface layer polyurethane slurry is 3500cps, the temperature is 30 ℃, and the dry-process surface layer membrane is prepared by mixing 200 parts of surface layer polyurethane resin LT-80, 50 parts of methyl formyl, 3 parts of flatting agent LT-7110 and 3 parts of color paste; the viscosity of the two-blade polyurethane slurry is 3500cps, the temperature is 30 ℃, and the two-blade polyurethane slurry is prepared by mixing 200 parts of two-blade polyurethane resin LT-8441, 50 parts of methyl formamide, 3 parts of flatting agent LT-7110 and 3 parts of color paste;
s3, uniformly coating the solvent-free slurry (with the thickness of 50 wires) on a dry-method surface layer membrane after mixing, preheating for 1min at 100 ℃ (the length of an oven is 15m, and the blast speed in the oven is 800r/min), after reaching the optimal bonding state, the obtained superfine fiber base layer and the superfine fiber base layer obtained in the step S1 are immediately extruded together through a laminating roller (the laminating layer is 120 threads, the used superfine fiber Beth thickness is 1.45mm) and then fully reacted in an oven at 160 ℃ for 3 minutes (the length of the oven is 80 meters, the blast speed in the oven is 1000r/min), finally the solvent-free superfine fiber synthetic leather is separated from release paper after being cooled by a cooling roller, wherein the viscosity of the solvent-free slurry is 4000cps, the temperature is 30 ℃, and the solvent-free slurry is prepared by mixing 200 parts of polyol A material AL-3081A, 150 parts of isocyanic acid B material AL-2008B, 0.5 part of catalyst NX-128 and 200 parts of aluminum hydroxide.
S4, forming basketball grains on the surface of the solvent-free superfine fiber synthetic leather in the step S3 in a pattern embossing roller transfer mode, wherein the temperature of the embossing roller is 230 ℃, the vehicle speed is 5m/min, the pressure is 8MPa, and the temperature of the preheating roller is 150 ℃; coating a layer of slip-resistant coating with very strong slip feeling on the surface of embossed solvent-free superfine fiber synthetic leather in a roller coating mode (a coating roller is 200 meshes, the vehicle speed is 30m/min, the oven temperature is 130 ℃, and the air blowing speed of the oven is 1000r/min), wherein the slip-resistant slurry of the slip-resistant coating is prepared by mixing 80 parts of polyurethane resin LA-7020, 80 parts of rosin resin DS-300T and 240 parts of butanone.
The polyurethane synthetic materials prepared in comparative examples 1 to 3 and examples 1 to 3 were respectively subjected to a correlation performance test, and the test results are shown in Table 1.
TABLE 1 Properties of the polyurethane synthetic materials tested in comparative examples 1 to 3 and examples 1 to 3
Note: table 1 the resistance to impact test is according to standard GB/T14625.3-1993, the environmental protection performance DMF test method is according to ISO/TS 16189: 2003.
the comparison of the data shows that the performance of the solvent-free polyurethane environment-friendly material for basketball is obviously superior to that of each proportion, which shows that the combination of the reverse roller process and the solvent-free foaming process in the invention can obviously improve the impact resistance and hydrolysis resistance of the solvent-free polyurethane material, and that the service life of the solvent-free polyurethane environment-friendly material for basketball is long.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The solvent-free polyurethane environment-friendly material for the basketball is characterized by sequentially consisting of a base material layer, a compact layer, a solvent-free foam hole layer and a slip-resistant surface layer, wherein the base material layer is formed by superfine fiber cloth bases, the solvent-free foam hole layer is formed by solvent-free slurry, and the slip-resistant surface layer is formed by coating and coating the surface layer of the superfine fiber cloth bases with the slurry by adopting a reverse roll process.
2. The solvent-free polyurethane environment-friendly material for basketball as claimed in claim 1, wherein the coating slurry comprises, in parts by weight, 100-150 parts of high solid content polyurethane resin, 100-150 parts of butanone and 10-50 parts of filler, wherein the solid content of the high solid content polyurethane resin is 30% -60%, and the filler is at least one of aluminum hydroxide or calcium carbonate; the substrate layer and the compact layer jointly form an ultrafine fiber base, and the thickness of the ultrafine fiber base is 1.0-2.0 mm.
3. A method for preparing the solvent-free polyurethane environment-friendly material for basketball as claimed in claim 1 or 2, comprising the steps of:
s1, coating the coating slurry on the surface of the superfine fiber cloth base by adopting a reverse roll process to form superfine fiber bass;
s2, coating the dry-process surface layer polyurethane slurry on release paper, drying to obtain a dry-process surface layer, coating the dry-process surface layer with the two-blade polyurethane slurry, and drying to obtain a dry-process surface layer membrane;
s3, mixing the solvent-free slurry, coating the mixture on the dry-method surface layer membrane, preheating, attaching the preheated mixture to the superfine fiber base, drying, cooling and stripping to obtain the solvent-free superfine fiber synthetic leather;
s4, preheating the solvent-free superfine fiber synthetic leather, embossing, and finally coating an anti-slip layer.
4. The method as claimed in claim 3, wherein the coating slurry has a viscosity of 1000-3000cps and a slurry temperature of 20-30 ℃ in step S1;
the parameters of the reverse roll process are as follows: the number of the reverse rollers is 70-200 meshes, the speed of the main engine is 10-20m/min, and the ratio of the speed of the main engine to the rotating speed of the reverse rollers is 1:1-1: 3.
5. The method according to claim 3, wherein in step S2, the dry-process polyurethane slurry is prepared by mixing 200 parts by weight of polyurethane resin for the surface layer, 50-100 parts by weight of methyl formamide, 0.5-3 parts by weight of leveling agent and 3-10 parts by weight of color paste;
the viscosity of the dry method surface layer polyurethane slurry is 1500-3500cps, the temperature is 20-30 ℃, and the knife coating thickness is 10-25 filaments; the speed is 5-20m/min, the drying temperature is 100-.
6. The preparation method according to claim 3, wherein in step S2, the polyurethane slurry is prepared by mixing 200 parts by weight of polyurethane resin, 50-100 parts by weight of methyl formamide, 0.5-3 parts by weight of leveling agent and 3-10 parts by weight of color paste;
the viscosity of the two-knife polyurethane slurry is 1500-3500cps, the temperature is 20-30 ℃, the knife coating thickness is 10-25 filaments, the speed is 5-20m/min, the drying temperature is 100-150 ℃, the time is 1-5min, the length of the second oven is 5-20m, and the blowing speed of the second oven is 200-800 r/min.
7. The preparation method as claimed in claim 3, wherein in step S3, the solvent-free slurry is prepared by mixing, by weight, 100-200 parts of the polyol A material, 100-350 parts of the isocyanate B material, 0.05-0.5 part of the catalyst and 100-200 parts of the filler;
the viscosity of the solvent-free slurry is 1000-4000cps, the temperature is 20-30 ℃, the knife coating thickness is 20-50 filaments, the vehicle speed is 5-20m/min, the preheating temperature is 70-100 ℃, the time is 1-3min, the length of a third oven is 5-10m, and the blast speed of the third oven is 200-800 r/min;
the drying is carried out at the temperature of 160 ℃ of 110-.
8. The method of claim 3, wherein in step S3, the conformable laminate is 60-140 filaments.
9. The method as claimed in claim 3, wherein in step S4, the preheating roller is used for preheating, the temperature of the preheating roller is 100-150 ℃, the embossing is performed by using an embossing roller, the temperature of the embossing roller is 160-230 ℃, the vehicle speed is 1-5m/min, and the pressure is 3-8 MPa.
10. The method as claimed in claim 3, wherein in step S4, the slip-resistant layer is made of slip-resistant slurry, the slip-resistant slurry is prepared by mixing 50-100 parts of polyurethane resin, 50-100 parts of rosin resin and 200-300 parts of butanone according to parts by weight, a coating roller for coating is 70-200 meshes, the vehicle speed is 10-30m/min, the oven temperature is 70-130 ℃, and the blowing speed is 500-1000 r/min.
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| CN111662544A (en) * | 2020-06-17 | 2020-09-15 | 定远县鑫宇体育股份有限公司 | Bonded basketball formed based on polyurethane resin at high temperature and preparation method thereof |
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