CN115703289A - Polyurethane foam product and preparation method of polyurethane foam - Google Patents

Abstract

The invention discloses a polyurethane foam product and a preparation method of polyurethane foam, wherein the polyurethane foam product contains uniformly distributed gaps, and the diameter of each gap is between 5 and 30 micrometers. The polyurethane foam product provided by the invention has the advantages that the diameter of the gap is between 5 and 30 micrometers, the introduction coefficient is lower, and the heat preservation and cold insulation performance is better. The preparation method of the polyurethane foam provided by the invention can control the aperture of the generated polyurethane foam to be between 5 and 30 microns, has good uniformity and excellent opening performance, can obtain the polyurethane foam with better latex feel and comfortable feeling, and can effectively reduce the production cost while ensuring the production efficiency.

Description

A kind of polyurethane foam product and the preparation method of polyurethane foam

technical field

The invention relates to the field of medical equipment and new material preparation, in particular to a polyurethane foam product and a preparation method of the polyurethane foam.

Background technique

Polyurethane foam is a new type of synthetic material with thermal insulation and waterproof functions. It has a low thermal conductivity. Rigid polyurethane foam is mainly used in building exterior wall insulation, roof waterproof and thermal insulation integration, cold storage thermal insulation, and pipeline thermal insulation materials. , building panels, refrigerated trucks and cold storage insulation materials, etc. In recent years, polyurethane foam has become more and more widely used in the field of medical devices. On the one hand, the polyurethane foam in the prior art has a large void diameter, usually between 100 microns and 350 microns; on the other hand, the processing technology of the polyurethane foam in the prior art is relatively complicated, and the production cost is relatively high.

Contents of the invention

The object of the present invention is to provide a kind of polyurethane foam product and the preparation method of polyurethane foam.

In the polyurethane foam product provided by the present invention, the polyurethane foam product contains uniformly distributed voids, and the diameter of the voids is between 5 microns and 30 microns.

The polyurethane foam product is a rectangular plate structure with a thickness of 3 cm. The polyurethane foam article comprises a tubular structure (1) made of polyurethane foam. The polyurethane foam product provided by the present invention is also provided with a hard inner wall pipe (2) and a hard outer wall pipe (3); the hard inner wall pipe (2) and the hard outer wall pipe (3) are coaxial There is an annular gap between the two, and the tubular structure (1) made of polyurethane foam is sandwiched in the annular gap between the hard inner wall tube (2) and the hard outer wall tube (3) . The axial length of the hard inner wall tube (2) is longer than the axial length of the hard outer wall tube (3); the thickness of the hard inner wall tube (2) is between 2 mm and 3 mm; the hard The thickness of the outer wall pipe (3) is between 0.8 mm and 1 mm.

The preparation method of the polyurethane foam provided by the present invention comprises the following steps: S1 is used for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution; S2 is used for foaming the prefabricated mixed solution to make it A foaming reaction occurs to generate a foam foam; S3 is used to dry the foam foam to obtain a polyurethane foam step.

The S1 is used in the step of mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed liquid, and the mixing mass ratio of the polyurethane prepolymer and the water phase material is between 1:1 and 1:0.4. The S1 is used for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution, and also includes a step for using a high-speed stirring instrument to perform high-speed agitation on the prefabricated mixed solution; The step of high-speed stirring of the prefabricated mixed solution by the instrument is carried out under the condition of airtight isolation; the step of using a high-speed stirring instrument to perform high-speed stirring of the prefabricated mixed solution, the stirring speed is 3000 rpm to 5000 rpm between. The S1 is used for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution, the temperature of the polyurethane prepolymer is between 25 degrees Celsius and 35 degrees Celsius, and the temperature of the water phase material is Between 0 degrees Celsius and 10 degrees Celsius; the S2 is used to foam the prefabricated mixed solution to cause a foaming reaction to generate a foaming sponge, and the temperature of the foaming treatment is between 25 degrees Celsius and 60 degrees Celsius ; The S3 is used for drying the foamed cotton to obtain polyurethane foam, and the drying temperature is between 100 degrees Celsius and 150 degrees Celsius. The polyurethane prepolymer is prepared by reacting toluene diisocyanate and polyether polyol; the water phase material is composed of water, surfactant, foam stabilizer and cell opener; the surfactant is made of silicone surface Active agent; the foam stabilizer adopts ethylene oxide polymer; the cell opening agent adopts one, two or three combinations of organosilicon polymer, micropowder silica gel or oxypropylene oxide ethylene propylene glycol ether.

In the polyurethane foam product provided by the invention, the diameter of the voids is between 5 microns and 30 microns, has a lower introduction coefficient, and has better heat preservation and cold preservation performance. The preparation method of polyurethane foam provided by the present invention can control the pore diameter of the generated polyurethane foam between 5 microns and 30 microns, has good uniformity, excellent cell opening performance, and can obtain polyurethane with better latex feeling and comfortable feeling. Foam, while ensuring production efficiency, can effectively reduce production costs.

Description of drawings

Fig. 1 is the structural representation of the polyurethane foam product described in the first embodiment of the present invention;

Fig. 2 is a schematic diagram of the steps of the method for preparing polyurethane foam described in Example 2 of the present invention.

Detailed ways

In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

This embodiment provides a polyurethane foam product, the polyurethane foam product contains uniformly distributed voids, and the diameter of the voids is between 5 microns and 30 microns. Those skilled in the art can understand that the pore size of the polyurethane foam product is set between 5 microns and 30 microns, which can make the polyurethane foam product have better heat insulation performance, and can be used in medical devices with higher heat preservation or cold preservation requirements middle.

Furthermore, the polyurethane foam product provided in this embodiment is a rectangular plate structure with a thickness of 3 cm. Those skilled in the art can understand that cutting the polyurethane foam provided in this embodiment into a 3 cm rectangular plate is convenient for transportation, stacking and storage, and for subsequent processing and use.

Further, the polyurethane foam product provided in this embodiment includes a tubular structure 1 made of polyurethane foam. Those skilled in the art can understand that the tubular structure 1 made of polyurethane foam can be used as a heat-insulating pipe in medical equipment or medical equipment.

Further, the polyurethane foam product provided in this embodiment is also provided with a hard inner wall pipe 2 and a hard outer wall pipe 3; the hard inner wall pipe 2 and the hard outer wall pipe 3 are arranged coaxially and between the two There is an annular gap, and the tubular structure 1 made of polyurethane foam is sandwiched in the annular gap between the hard inner wall tube 2 and the hard outer wall tube 3 . Those skilled in the art can understand that hard tubes are arranged on the inner wall side and the outer wall side of the tubular structure 1 made of polyurethane foam, and the medium that needs heat preservation treatment, such as liquid, can be directly placed in the inner wall tube; the hard outer wall tube 3 It can protect the tubular structure 1 made of polyurethane foam, preventing it from deforming and being damaged by external environment such as bumping, bumping, scraping and cutting.

Further, the axial length of the rigid inner tube 2 is greater than the axial length of the rigid outer tube 3 . Those skilled in the art can understand that, in this way, the hard inner wall tube 2 protrudes from the hard outer wall tube 3 and the hard outer wall tube 3 , which is convenient for assembly.

Further, the thickness of the hard inner wall tube 2 is between 2mm and 3mm. Those skilled in the art can understand that setting the thickness of the hard inner wall tube 2 between 2 mm and 3 mm can ensure that the hard inner wall tube 2 meets the use requirements and at the same time ensure that it has a lighter weight and a lower manufacturing cost.

Further, the thickness of the hard outer wall tube 3 is between 0.8 mm and 1 mm. Those skilled in the art can understand that setting the thickness of the hard outer wall tube 3 between 0.8 mm and 1 mm can ensure that the hard outer wall tube 3 meets the use requirements and at the same time ensure that it has a lighter weight and a lower manufacturing cost.

Embodiment two

The present embodiment provides a kind of preparation method of polyurethane foam, comprises the steps:

S1 is a step for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution;

S2 is a step for foaming the prefabricated mixed solution to cause a foaming reaction to generate foam;

S3 is a step for drying the foamed cotton to obtain polyurethane foam.

Further, the S1 is used for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution, the mixing mass ratio of the polyurethane prepolymer and the water phase material is between 1:1 and 1:0.4 between. Those skilled in the art can understand that if the mixing mass ratio of the polyurethane prepolymer and the water phase material is between 1:1 and 1:0.4, the pore size of the pores in the generated polyurethane foam can be controlled between 5 microns and 30 microns between.

Further, the step of S1 for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution also includes a step of using a high-speed stirring device to perform high-speed stirring on the prefabricated mixed solution. Those skilled in the art can understand that this can increase the uniformity of the prefabricated mixture, making the quality of the resulting foam more uniform and stable.

Further, the step of using a high-speed stirring device to high-speed stir the prefabricated mixed solution is carried out under the condition of airtight isolation. Those skilled in the art can understand that high-speed stirring under airtight and air-isolated conditions can prevent air from being mixed in the stirring process to form air bubbles, resulting in uneven foaming, resulting in poor uniformity of the internal structure of the polyurethane foam generated, and heat insulation. Poor performance.

Further, in the step of using a high-speed stirring device to stir the prefabricated mixed solution at a high speed, the stirring speed is between 3000 rpm and 5000 rpm.

Further, the S1 is used for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution, the temperature of the polyurethane prepolymer is between 25 degrees Celsius and 35 degrees Celsius, and the water phase material The temperature is between 0°C and 10°C.

Further, the step of S2 is used for foaming the prefabricated mixed solution to cause a foaming reaction to generate a foam, and the temperature of the foaming treatment is between 25 degrees Celsius and 60 degrees Celsius. Those skilled in the art can understand that setting the temperature of the foaming treatment between 25 degrees Celsius and 60 degrees Celsius can ensure the foaming effect, and controlling the pore size between 5 microns and 30 microns can ensure that the foaming process has a better effect. Short time ensures high production efficiency.

Further, the S3 is used for drying the foamed cotton to obtain the polyurethane foam, and the drying temperature is between 100°C and 150°C. Those skilled in the art can understand that setting the drying temperature between 100°C and 150°C can guarantee the drying effect, shorten the drying time, and have better production efficiency.

Further, the S1 is used to mix the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution. The polyurethane prepolymer can be reacted with toluene diisocyanate (TDI, Toluene diisocyanate) and polyether polyol be made of.

Further, the water phase material is composed of water, surfactant, foam stabilizer and cell opener.

Further, the surfactant can be an organosilicon surfactant.

Further, the foam stabilizer can use ethylene oxide polymer.

为线型结构。无论是液体、固体或弹性体的聚硅氧烷均有很高的电绝缘性、憎水性、耐热性、耐寒性。本领域技术人员可以理解，微粉硅胶是白色粉末状的无机化工产品。微粉硅胶无毒、无味、不燃、不爆、不挥发、无腐蚀、孔容大、表面活性强。微粉硅胶化学性质稳定，不溶于水。本领域技术人员可以理解，采用上述开孔剂，可使得本实施来所生成的聚氨酯泡沫具有较高的回弹性能，可有效增加发泡工艺的宽容度，具有优异的开孔性，防止闭孔，可有效改善聚氨酯泡沫结构，有效提高聚氨酯泡沫材料的乳胶感和舒适感。Further, the pore opener can be one, two or three combinations of organosilicon polymer, micropowder silica gel or propylene oxide propylene glycol ether (KF-28). Those skilled in the art can understand that the organosilicon polymer is also called polysiloxane or polysiloxane. Silicone polymers are polymers with carbon side chains attached to Si atoms. Silicone polymers are liquid, semi-solid or solid depending on their molecular weight. Silicone polymers can be divided into three categories according to their form and use: silicone oil, silicone resin and silicone rubber. Silicone oil is an oily liquid with a linear structure produced by hydrolysis and polycondensation of monofunctional and difunctional methyl, ethyl or phenyl chlorosilanes. Silicone resin is a linear polymer produced by hydrolyzing prepolymers of bifunctional and trifunctional monomers in a certain proportion, which can undergo crosslinking and curing reactions to become a silicone resin with a thermosetting network three-dimensional structure. Silicone rubber is formed by hydrolysis and polycondensation of extremely pure bifunctional monomers, with an average molecular weight of

is a linear structure. Polysiloxane, whether it is liquid, solid or elastomer, has high electrical insulation, water repellency, heat resistance, and cold resistance. Those skilled in the art can understand that micronized silica gel is a white powdery inorganic chemical product. Micro-powder silica gel is non-toxic, tasteless, non-flammable, non-explosive, non-volatile, non-corrosive, large pore volume, and strong surface activity. Micropowder silica gel is chemically stable and insoluble in water. Those skilled in the art can understand that the use of the above-mentioned cell-opening agent can make the polyurethane foam generated in this practice have higher resilience performance, effectively increase the tolerance of the foaming process, have excellent cell-opening properties, and prevent closed cells. Holes can effectively improve the polyurethane foam structure, effectively improve the latex feel and comfort of polyurethane foam materials.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A polyurethane foam product, characterized in that the polyurethane foam product contains uniformly distributed voids, and the diameter of the voids is between 5 microns and 30 microns. 2. The polyurethane foam product according to claim 1, characterized in that, the polyurethane foam product is a rectangular plate structure with a thickness of 3 cm. 3. The polyurethane foam product according to claim 1, characterized in that it comprises a tubular structure (1) made of polyurethane foam. 4. polyurethane foam product as claimed in claim 3, is characterized in that, is also provided with a hard inner wall pipe (2) and a hard outer wall pipe (3); Described hard inner wall pipe (2) and described hard The hard outer wall pipe (3) is coaxially arranged with an annular gap between the two, and the tubular structure (1) made of polyurethane foam is sandwiched between the hard inner wall pipe (2) and the hard outer wall pipe ( 3) In the annular space between. 5. polyurethane foam product as claimed in claim 4, is characterized in that, the axial length of described rigid inner wall pipe (2) is greater than the axial length of described rigid outer wall pipe (3); Described rigid inner wall pipe ( 2) the thickness is between 2 mm and 3 mm; the thickness of the hard outer wall tube (3) is between 0.8 mm and 1 mm. 6. a preparation method of polyurethane foam, is characterized in that, comprises the steps: S1 is a step for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution; S2 is a step for foaming the prefabricated mixed solution to cause a foaming reaction to generate foam; S3 is a step for drying the foamed cotton to obtain polyurethane foam. 7. the preparation method of polyurethane foam as claimed in claim 6 is characterized in that, described S1 is used for polyurethane prepolymer and water phase material are mixed, in the step of forming prefabricated mixed solution, described polyurethane prepolymer The mixing mass ratio with the water phase material is between 1:1 and 1:0.4. 8. The preparation method of polyurethane foam as claimed in claim 7, characterized in that, said S1 is used for mixing the polyurethane prepolymer and the water phase material to form a prefabricated mixed solution, and also includes the step of using high-speed The step of high-speed stirring of the prefabricated mixed solution by the stirring instrument; the step of high-speed stirring of the prefabricated mixed solution by using the high-speed stirring instrument is carried out under the condition of airtight isolation; the step of using the high-speed stirring instrument to mix the prefabricated The step of stirring the liquid at a high speed, the stirring speed is between 3000 rpm and 5000 rpm. 9. The preparation method of polyurethane foam as claimed in claim 8, is characterized in that, described S1 is used for mixing polyurethane prepolymer and water phase material, in the step of forming prefabricated mixed solution, described polyurethane prepolymer The temperature of the water phase material is between 25 degrees Celsius and 35 degrees Celsius, and the temperature of the water phase material is between 0 degrees Celsius and 10 degrees Celsius; the S2 is used for foaming the prefabricated mixed liquid to cause a foaming reaction to generate foam In the step of foaming, the temperature of the foaming treatment is between 25 degrees Celsius and 60 degrees Celsius; the S3 is used to dry the foaming foam, so that in the step of obtaining polyurethane foam, the drying temperature is 100 degrees Celsius to 150 degrees Celsius between degrees Celsius. 10. the preparation method of polyurethane foam as claimed in claim 9 is characterized in that, described polyurethane prepolymer adopts toluene diisocyanate and polyether polyol reaction to make; Described aqueous phase material is made of water, surfactant, A foam stabilizer and a cell opener are mixed; the surfactant is a silicone surfactant; the foam stabilizer is an ethylene oxide polymer; the cell opener is a silicone polymer, micropowdered silica gel or oxide One, two or three combinations of propylene oxide ethylene propylene glycol ethers.

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