CN117510777A - Preparation method of air cushion sponge without photocatalyst polyurethane - Google Patents

Preparation method of air cushion sponge without photocatalyst polyurethane Download PDF

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Publication number
CN117510777A
CN117510777A CN202311600774.3A CN202311600774A CN117510777A CN 117510777 A CN117510777 A CN 117510777A CN 202311600774 A CN202311600774 A CN 202311600774A CN 117510777 A CN117510777 A CN 117510777A
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sponge
parts
air cushion
catalyst
matt
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CN117510777B (en
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邓先胜
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Shandong Qiupai Cosmetics Co ltd
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Shandong Qiupai Cosmetics Co ltd
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    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/4009Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
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    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/143Halogen containing compounds
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    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
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Abstract

The application provides a preparation method of an air cushion sponge of polyurethane without a catalyst, which comprises the following steps of 1) preparing raw materials: the raw materials comprise the following components in parts by mass: 90-105 parts of polyether polyol, 45-58 parts of toluene diisocyanate, 3-6 parts of foaming agent, 3-10 parts of non-photocatalyst powder and 3-5 parts of water; 2) Mixing materials; 3) Foaming; 4) Cutting off; 5) Curing; 6) Cutting the sheet; 7) And cutting the finished product to obtain the air cushion sponge. The raw materials are added with the matt catalyst powder, and the prepared air cushion sponge contains the matt catalyst, so that the air cushion sponge has the functions of deodorization, sterilization, mildew resistance, antifouling self-cleaning and the like under the matt condition; the air cushion sponge containing the non-photocatalyst powder can effectively kill bacteria such as escherichia coli, staphylococcus aureus, mould and the like, and viruses such as influenza virus, coronavirus, enterovirus and the like, and can decompose and harmlessly treat toxins released by the bacteria or the fungi.

Description

Preparation method of air cushion sponge without photocatalyst polyurethane
Technical Field
The invention belongs to the technical field of air cushion sponge preparation, and particularly relates to a preparation method of an air cushion sponge without photocatalyst polyurethane.
Background
The air cushion is a novel cosmetic which is prepared by adsorbing face cosmetic product preparations such as sun cream, isolation cream, foundation liquid and the like in special sponge materials and placing the face cosmetic product preparations in a powder cake container, and is usually matched with a powder puff for use. The powder puff is one kind of cosmetics tool for dipping foundation and decorating dressing. The air cushion sponge comprises a rubber foaming sponge and a polyurethane foaming sponge.
Different from the photocatalysis which needs to generate catalysis action principle through ultraviolet irradiation, the non-photocatalyst has strong adsorptivity and potential transfer with nanoparticle characteristics to generate high-energy translocation reaction, can generate catalysis reaction (redox reaction) under the non-light condition to generate hydroxyl free radical with strong oxidizing power, can substantially and continuously eliminate harmful gases such as formaldehyde, benzene, TVOC and the like, and simultaneously has the effects of deodorization, sterilization, mildew prevention, antifouling self-cleaning, air purification and the like. The catalyst can effectively kill various bacteria, decompose and harmlessly treat toxins released by bacteria or fungi, kill escherichia coli, staphylococcus aureus, pneumococcus and the like, and kill mold; the catalyst-free virus can kill influenza virus, coronavirus, hepatitis virus, enterovirus, etc.
Therefore, how to innovatively add the matt catalyst into the air cushion sponge, so that the air cushion sponge has the functions of deodorization, sterilization, mildew prevention, antifouling self-cleaning and the like under the matt condition, and the air cushion sponge is a technical problem which needs to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to provide a preparation method of an air cushion sponge without catalyst polyurethane.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the preparation method of the air cushion sponge without the photocatalyst polyurethane comprises the following steps in sequence:
1) Preparing raw materials: the raw materials comprise the following components in parts by mass: 90-105 parts of polyether polyol, 45-58 parts of toluene diisocyanate, 3-6 parts of foaming agent, 3-10 parts of non-photocatalyst powder and 3-5 parts of water;
2) Mixing: adding the raw materials in the step 1) into a mixer according to a formula, mixing, uniformly stirring and preheating;
3) Foaming: pumping the mixture obtained in the step 2) into a foaming machine for foaming;
4) Cutting: after foaming forming is finished, a cuboid sponge is obtained, and then the cuboid sponge is conveyed to a cutting machine for cutting;
5) Curing: spreading and placing the sponge on an open and ventilated stacking rack for curing;
6) Cutting the sheet: cutting the blocky sponge into sheet-shaped sponge with a certain thickness by a sponge cutting machine;
7) Cutting a finished product: and (5) punching and cutting the sheet-shaped sponge by using a punching machine to obtain the air cushion sponge.
Preferably, in step 1), the raw materials further comprise the following components in parts by mass: 2 to 15 parts of polymer polyol, 0.20 to 0.30 part of stannous octoate, 0.1 to 0.3 part of triethylene diamine and 1.0 to 1.5 parts of organic silicon foam homogenizing agent;
the foaming agent is methylene dichloride.
Preferably, in step 1), the non-catalytic powder comprises the following components in percentage by mass: 3 to 5 percent of nano phosphorus pentoxide, 4 to 6 percent of nano zinc oxide, 0.5 to 1.0 percent of nano indium oxide, 0.5 to 1.5 percent of nano silver oxide and the balance of nano titanium dioxide.
Preferably, in the step 2), the preheating temperature is 25-50 ℃, and the rotating speed of mixing and stirring is 100-200 r/min.
Preferably, in step 3), the foaming time is 100 to 120 seconds.
Preferably, in step 5), the curing time is from 35 to 40 hours.
Preferably, in step 3), the foaming degree is controlled so that the thickness of the walls of the openings in the sponge is 0.01 to 0.15mm;
the preparation method of the catalyst-free powder comprises the following steps: the preparation method comprises the steps of stirring and mixing various raw materials including nano titanium dioxide uniformly according to a formula, pressing mixed powder into a wafer with the diameter of 2cm and the thickness of 5mm by utilizing compression molding in powder metallurgy, sintering the wafer, crushing the sintered wafer, and controlling the crushing degree to ensure that the particle size of the obtained matt catalyst powder after crushing is 2-4 times of the thickness of a pore wall, so that the pore wall cannot completely wrap any matt catalyst particle after foaming molding, embedding a part of the volume of each matt catalyst particle in a part of all matt catalyst particles into the pore wall or pasting the part of the volume of each matt catalyst particle on the pore wall, exposing the rest of the volume of each matt catalyst particle in the atmosphere, and embedding each matt catalyst particle in the rest of the matt catalyst particles into a cavity without contacting the pore wall and directly contacting with the atmosphere.
The application achieves the following beneficial technical effects:
in this application, 1) raw materials are prepared: the raw materials comprise the following components in parts by mass: 90-105 parts of polyether polyol, 45-58 parts of toluene diisocyanate, 3-6 parts of foaming agent, 3-10 parts of non-photocatalyst powder and 3-5 parts of water; 2) Mixing materials; 3) Foaming; 4) Cutting off; 5) Curing; 6) Cutting the sheet; 7) Cutting the finished product to obtain an air cushion sponge; the core innovation point of the polyurethane air cushion sponge is that the raw material of the polyurethane air cushion sponge is added with the matt catalyst powder for the first time, so that the prepared air cushion sponge contains the matt catalyst, and the air cushion sponge has the functions of deodorization, sterilization, mildew resistance, antifouling self-cleaning and the like under the matt condition for the first time, and the air cushion sponge containing the matt catalyst is not searched in the prior art;
the air cushion sponge containing the non-photocatalyst can effectively kill various bacteria, can decompose and innocently treat toxins released by bacteria or fungi, can kill escherichia coli, staphylococcus aureus, salmonella, pneumococcus, antibiotic drug-resistant bacteria, pseudomonas aeruginosa, aspergillus, bacillus subtilis black variant spores, odontopathy and the like, and can kill moulds;
the air cushion sponge containing no photocatalyst can kill viruses, for example: influenza virus, coronavirus, hepatitis virus, enterovirus, coxsackievirus, varicella-zoster virus, and the like.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and the described embodiments are only some embodiments of the present invention, but not all embodiments. Thus, all other embodiments, which can be made by one of ordinary skill in the art without undue burden from the invention, are intended to be within the scope of the invention.
The application provides a preparation method of an air cushion sponge without photocatalyst polyurethane, which comprises the following steps in sequence:
1) Preparing raw materials: the raw materials comprise the following components in parts by mass: 90-105 parts of polyether polyol, 45-58 parts of toluene diisocyanate, 3-6 parts of foaming agent, 3-10 parts of non-photocatalyst powder and 3-5 parts of water;
2) Mixing: adding the raw materials in the step 1) into a mixer according to a formula, mixing, uniformly stirring and preheating;
3) Foaming: pumping the mixture obtained in the step 2) into a foaming machine for foaming;
4) Cutting: after foaming forming is finished, a cuboid sponge is obtained, and then the cuboid sponge is conveyed to a cutting machine for cutting;
5) Curing: spreading and placing the sponge on an open and ventilated stacking rack for curing;
6) Cutting the sheet: cutting the blocky sponge into sheet-shaped sponge with a certain thickness by a sponge cutting machine;
7) Cutting a finished product: and (5) punching and cutting the sheet-shaped sponge by using a punching machine to obtain the air cushion sponge.
In one embodiment of the present application, in step 1), the raw materials further include the following components in parts by mass: 2 to 15 parts of polymer polyol, 0.20 to 0.30 part of stannous octoate, 0.1 to 0.3 part of triethylene diamine and 1.0 to 1.5 parts of organic silicon foam homogenizing agent;
the foaming agent is methylene dichloride.
In one embodiment of the present application, in step 1), the non-catalytic powder comprises the following components in mass percent: 3 to 5 percent of nano phosphorus pentoxide, 4 to 6 percent of nano zinc oxide, 0.5 to 1.0 percent of nano indium oxide, 0.5 to 1.5 percent of nano silver oxide and the balance of nano titanium dioxide.
In one embodiment of the present application, in step 2), the preheating temperature is 25 to 50 ℃, and the rotational speed of the mixing and stirring is 100 to 200r/min.
In one embodiment of the present application, in step 3), the foaming time is 100 to 120 seconds.
In one embodiment of the present application, in step 5), the curing time is 35 to 40 hours.
In the prior air cushion sponge, because polyurethane is formed by foaming, the entity in the air cushion sponge is the pore wall (foam wall) of an opening after foaming, the thickness of the pore wall (foam wall) is in the micron level (the preferred thickness is 0.01-0.15 mm) visible to naked eyes, and the inner diameter of a cavity of a foam hole is much larger, and the inner diameter is about 1-3 mm;
moreover, only the titanium dioxide is in a nano level, so that the titanium dioxide has the functions of deodorization, sterilization, mildew prevention, antifouling self-cleaning, air purification, catalysis and the like, namely nano performance, the non-nano titanium dioxide does not have the functions of sterilization and the like, and other nano zinc oxide, nano indium oxide, nano silver oxide and the like have the same nano particle size and can play the functions of sterilization and the like;
thus, the thickness of the pore wall (bubble wall) is in the micron level, the thickness of the pore wall is 10-100 times of the particle diameter of the particles such as nano titanium dioxide and the like, so that almost every particle such as nano titanium dioxide and the like is completely and easily embedded in the pore wall of the open pore, the non-photocatalyst particles are completely wrapped and covered by the pore wall, so that the non-photocatalyst particles cannot directly contact with external bacteria, viruses, dirt, odor and the like, and the strongly oxidative substances (such as hydroxyl free radicals, oxygen and the like) generated by the non-photocatalyst particles cannot directly contact with external bacteria, viruses, dirt, odor and the like through the pore wall, and the deodorizing, sterilizing, mildew preventing, antifouling and self-cleaning effects and efficiency of the non-photocatalyst are obviously limited and weakened;
for this purpose, in step 3) of the present application, the foaming degree is controlled so that the thickness of the walls of the open pores in the sponge is 0.01 to 0.15mm;
the preparation method of the catalyst-free powder comprises the following steps: firstly, uniformly stirring and mixing various raw materials including nano titanium dioxide according to a formula, pressing mixed powder into a wafer with the diameter of 2cm and the thickness of 5mm by utilizing compression molding in powder metallurgy, sintering the wafer, crushing the sintered wafer, and controlling the crushing degree to ensure that the particle size of the obtained matt catalyst powder after crushing is 2-4 times of the thickness of a pore wall, so that the pore wall cannot completely wrap any one matt catalyst particle after foaming molding, embedding a part of the volume of each matt catalyst particle in part of all matt catalyst particles into the pore wall or pasting the matt catalyst particle on the pore wall, exposing the rest of the volume of the matt catalyst particle in the atmosphere, and embedding each matt catalyst particle in the rest of the matt catalyst particle into a cavity without contacting the pore wall and directly contacting the atmosphere;
the sintering is preferably performed at a low temperature of 500-650 ℃, because the adjacent particles are only in point contact connection in the sintering process, most of the outer surfaces of nano particles such as nano titanium dioxide are still blank and unbonded originally, namely, most of the volumes of nano particles such as nano titanium dioxide are still nano-sized originally, so that the nano particles such as nano titanium dioxide in the nano catalyst particles are nano-sized and still have nano performance although the nano particles obtained by re-crushing after sintering, and the nano catalyst particles obtained by re-crushing after sintering still have the functions of deodorization, sterilization, mildew resistance, antifouling self-cleaning, air purification, catalysis and the like;
the particle size of the obtained matt catalyst powder after the crushing is 2-4 times of the thickness of the pore wall, namely the particle size of the matt catalyst particles is larger, and the pore wall is thinner but the area is larger, so that the pore wall cannot completely wrap any matt catalyst particles after the foaming molding, a part of the volume of a part of the matt catalyst particles is pre-buried or stuck, the other part of the volume is exposed to the atmosphere, the rest of the matt catalyst particles are embedded in a cavity of a pore and do not contact with the pore wall, and stone balls in the mouth of a doorway stone lion are hollow and movable, and are exposed to the atmosphere to be in direct contact with air;
the whole volume of a part of the non-photocatalyst particles is exposed to the atmosphere, and the part of the volume of the rest of the non-photocatalyst particles is exposed to the atmosphere, so that the non-photocatalyst particles are convenient to directly contact with external bacteria, viruses, dirt, odor and the like, and the substances with strong oxidability generated by the non-photocatalyst particles are convenient to directly contact with the external bacteria, viruses, dirt, odor and the like, thereby ensuring the deodorizing, sterilizing, mildew preventing, antifouling and self-cleaning effects and the efficiency of the non-photocatalyst air cushion sponge are improved;
furthermore, in the sponge, the non-photocatalyst particles are easy to vibrate, rub and rub in the using process of the air cushion sponge and fall out of the air cushion sponge, so that the non-photocatalyst particles in the air cushion sponge are less and less along with the prolonging of the using time, and the purifying and sterilizing capabilities are weaker and weaker;
therefore, in the application, as a part of the volume of the rest quantity of the matt catalyst particles is still embedded in the hole wall, namely, a part of the embedded part is exposed, namely, the hole wall still has a fixed supporting effect on the matt catalyst particles, similar to the fixed supporting effect of soil on plants, the matt catalyst particles are firmly fixed in the air cushion sponge and cannot fall off from the air cushion sponge, the quantity of the rest quantity of the matt catalyst particles cannot be reduced, the matt catalyst is effective for a long time, and the service time and the service effect of the functions of deodorization, sterilization, mildew prevention, antifouling self-cleaning and the like of the air cushion sponge of the matt catalyst are obviously improved.
The method and the device which are not described in detail in the invention are all the prior art and are not described in detail.
The present invention will be further specifically illustrated by the following examples, which are not to be construed as limiting the invention, but rather as falling within the scope of the present invention, for some non-essential modifications and adaptations of the invention that are apparent to those skilled in the art based on the foregoing disclosure.
Example 1
The preparation method of the air cushion sponge without the photocatalyst polyurethane comprises the following steps in sequence:
1) Preparing raw materials: the raw materials comprise the following components in parts by mass: 95 parts of polyether polyol, 48 parts of toluene diisocyanate, 5 parts of foaming agent, 6 parts of non-photocatalyst powder and 5 parts of water;
in the step 1), the raw materials also comprise the following components in parts by mass: 6 parts of polymer polyol, 0.20 part of stannous octoate, 0.2 part of triethylene diamine and 1.2 parts of organosilicon foam homogenizing agent;
the foaming agent is methylene dichloride;
in step 1), the catalyst-free powder comprises the following components in percentage by mass: 4% of nano phosphorus pentoxide, 5% of nano zinc oxide, 0.8% of nano indium oxide, 1.0% of nano silver oxide and the balance of nano titanium dioxide;
the preparation method of the catalyst-free powder comprises the following steps: firstly, uniformly stirring and mixing various raw materials including nano titanium dioxide according to a formula, then, pressing mixed powder into a disc with the diameter of 2cm and the thickness of 5mm by using press forming in powder metallurgy, then, sintering the disc, then, crushing the sintered disc, and controlling the crushing degree to ensure that the particle size of the matt catalyst powder obtained after the crushing is 2.9-3.2 times of the thickness of a pore wall;
2) Mixing: adding the raw materials in the step 1) into a mixer according to a formula, mixing, uniformly stirring and preheating;
in the step 2), the preheating temperature is 40-45 ℃, and the rotating speed of mixing and stirring is 180-200 r/min;
3) Foaming: pumping the mixture obtained in the step 2) into a foaming machine for foaming;
in step 3), the foaming time is 120 seconds;
after foaming molding, the hole wall cannot completely wrap any one of the non-photocatalyst particles, so that a part of the volume of each non-photocatalyst particle in a part of the total non-photocatalyst particles is embedded in the hole wall or stuck on the hole wall in a pre-embedded manner, the rest of the volume of the non-photocatalyst particles is exposed to the atmosphere, and each non-photocatalyst particle in the rest is embedded in the cavity of the foam hole without contacting the hole wall and directly contacts the atmosphere;
4) Cutting: after foaming forming is finished, a cuboid sponge is obtained, and then the cuboid sponge is conveyed to a cutting machine for cutting;
5) Curing: spreading the sponge on a hollow and ventilated stacking rack for full curing;
in step 5), the curing time is 40 hours;
6) Cutting the sheet: cutting the blocky sponge into sheet-shaped sponge with a certain thickness by a sponge cutting machine;
7) Cutting a finished product: and (5) punching and cutting the sheet-shaped sponge by using a punching machine to obtain the air cushion sponge.
Example 2
The preparation method of the air cushion sponge without the photocatalyst polyurethane comprises the following steps in sequence:
1) Preparing raw materials: the raw materials comprise the following components in parts by mass: 100 parts of polyether polyol, 55 parts of toluene diisocyanate, 6 parts of foaming agent, 6 parts of non-photocatalyst powder and 4.5 parts of water;
in the step 1), the raw materials also comprise the following components in parts by mass: 8 parts of polymer polyol, 0.30 part of stannous octoate, 0.25 part of triethylene diamine and 1.1 parts of organosilicon foam homogenizing agent;
the foaming agent is methylene dichloride;
in step 1), the catalyst-free powder comprises the following components in percentage by mass: 5% of nano phosphorus pentoxide, 4% of nano zinc oxide, 0.8% of nano indium oxide, 1.2% of nano silver oxide and the balance of nano titanium dioxide;
the preparation method of the catalyst-free powder comprises the following steps: firstly, uniformly stirring and mixing various raw materials including nano titanium dioxide according to a formula, then, pressing mixed powder into a disc with the diameter of 2cm and the thickness of 5mm by using press forming in powder metallurgy, then, sintering the disc, then, crushing the sintered disc, and controlling the crushing degree to ensure that the particle size of the matt catalyst powder obtained after the crushing is 3.5-4 times of the thickness of a pore wall;
2) Mixing: adding the raw materials in the step 1) into a mixer according to a formula, mixing, uniformly stirring and preheating;
in the step 2), the preheating temperature is 40-45 ℃, and the rotating speed of mixing and stirring is 180-200 r/min;
3) Foaming: pumping the mixture obtained in the step 2) into a foaming machine for foaming;
in step 3), the foaming time is 120 seconds;
after foaming molding, the hole wall cannot completely wrap any one of the non-photocatalyst particles, so that a part of the volume of each non-photocatalyst particle in a part of the total non-photocatalyst particles is embedded in the hole wall or stuck on the hole wall in a pre-embedded manner, the rest of the volume of the non-photocatalyst particles is exposed to the atmosphere, and each non-photocatalyst particle in the rest is embedded in the cavity of the foam hole without contacting the hole wall and directly contacts the atmosphere;
4) Cutting: after foaming forming is finished, a cuboid sponge is obtained, and then the cuboid sponge is conveyed to a cutting machine for cutting;
5) Curing: spreading the sponge on a hollow and ventilated stacking rack for full curing;
in step 5), the curing time is 38 hours;
6) Cutting the sheet: cutting the blocky sponge into sheet-shaped sponge with a certain thickness by a sponge cutting machine;
7) Cutting a finished product: and (5) punching and cutting the sheet-shaped sponge by using a punching machine to obtain the air cushion sponge.
Table 1 antibacterial test results of air cushion sponges prepared in examples
Table 2 test results of air cushion sponges prepared in examples
Antiviral Activity Rate (H1N 1) Mildew resistant grade
Example 1 90.25% Level 0
Example 2 97.46% Level 0
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. The preparation method of the air cushion sponge without the photocatalyst polyurethane is characterized by comprising the following steps in sequence:
1) Preparing raw materials: the raw materials comprise the following components in parts by mass: 90-105 parts of polyether polyol, 45-58 parts of toluene diisocyanate, 3-6 parts of foaming agent, 3-10 parts of non-photocatalyst powder and 3-5 parts of water;
2) Mixing: adding the raw materials in the step 1) into a mixer according to a formula, mixing, uniformly stirring and preheating;
3) Foaming: pumping the mixture obtained in the step 2) into a foaming machine for foaming;
4) Cutting: after foaming forming is finished, a cuboid sponge is obtained, and then the cuboid sponge is conveyed to a cutting machine for cutting;
5) Curing: spreading and placing the sponge on an open and ventilated stacking rack for curing;
6) Cutting the sheet: cutting the blocky sponge into sheet-shaped sponge with a certain thickness by a sponge cutting machine;
7) Cutting a finished product: and (5) punching and cutting the sheet-shaped sponge by using a punching machine to obtain the air cushion sponge.
2. The method for preparing the air cushion sponge without catalyst polyurethane according to claim 1, wherein in the step 1), the raw materials further comprise the following components in parts by mass: 2 to 15 parts of polymer polyol, 0.20 to 0.30 part of stannous octoate, 0.1 to 0.3 part of triethylene diamine and 1.0 to 1.5 parts of organic silicon foam homogenizing agent;
the foaming agent is methylene dichloride.
3. The method for preparing a matt polyurethane air cushion sponge according to claim 1, wherein in step 1), the matt polyurethane powder comprises the following components in percentage by mass: 3 to 5 percent of nano phosphorus pentoxide, 4 to 6 percent of nano zinc oxide, 0.5 to 1.0 percent of nano indium oxide, 0.5 to 1.5 percent of nano silver oxide and the balance of nano titanium dioxide.
4. The method for preparing an air cushion sponge without catalyst polyurethane according to claim 1, wherein in the step 2), the preheating temperature is 25-50 ℃, and the rotational speed of mixing and stirring is 100-200 r/min.
5. The method for preparing an air cushion sponge of polyurethane without catalyst according to claim 1, wherein in the step 3), the foaming time is 100-120 seconds.
6. The method for preparing a polyurethane foam cushion without catalyst according to claim 1, wherein in the step 5), the curing time is 35-40 hours.
7. The method for preparing an air cushion sponge of polyurethane without catalyst according to claim 1, wherein in the step 3), the foaming degree is controlled so that the thickness of the wall of the open pores in the sponge is 0.01-0.15 mm;
the preparation method of the catalyst-free powder comprises the following steps: the preparation method comprises the steps of stirring and mixing various raw materials including nano titanium dioxide uniformly according to a formula, pressing mixed powder into a wafer with the diameter of 2cm and the thickness of 5mm by utilizing compression molding in powder metallurgy, sintering the wafer, crushing the sintered wafer, and controlling the crushing degree to ensure that the particle size of the obtained matt catalyst powder after crushing is 2-4 times of the thickness of a pore wall, so that the pore wall cannot completely wrap any matt catalyst particle after foaming molding, embedding a part of the volume of each matt catalyst particle in a part of all matt catalyst particles into the pore wall or pasting the part of the volume of each matt catalyst particle on the pore wall, exposing the rest of the volume of each matt catalyst particle in the atmosphere, and embedding each matt catalyst particle in the rest of the matt catalyst particles into a cavity without contacting the pore wall and directly contacting with the atmosphere.
CN202311600774.3A 2023-11-28 2023-11-28 Preparation method of air cushion sponge without photocatalyst polyurethane Active CN117510777B (en)

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