CN117818122A - Preparation method of buoyancy cotton and buoyancy cotton - Google Patents
Preparation method of buoyancy cotton and buoyancy cotton Download PDFInfo
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- CN117818122A CN117818122A CN202311861158.3A CN202311861158A CN117818122A CN 117818122 A CN117818122 A CN 117818122A CN 202311861158 A CN202311861158 A CN 202311861158A CN 117818122 A CN117818122 A CN 117818122A
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- buoyancy
- cotton
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- foaming
- flame retardant
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 127
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003063 flame retardant Substances 0.000 claims abstract description 31
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005187 foaming Methods 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 22
- 229920000570 polyether Polymers 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 229920005862 polyol Polymers 0.000 claims description 13
- 150000003077 polyols Chemical class 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 7
- 239000012948 isocyanate Substances 0.000 claims description 7
- 150000002513 isocyanates Chemical class 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 6
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 6
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 6
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 229920000223 polyglycerol Polymers 0.000 claims description 6
- 239000004088 foaming agent Substances 0.000 claims description 5
- 230000002829 reductive effect Effects 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 claims description 2
- DIHKMUNUGQVFES-UHFFFAOYSA-N n,n,n',n'-tetraethylethane-1,2-diamine Chemical group CCN(CC)CCN(CC)CC DIHKMUNUGQVFES-UHFFFAOYSA-N 0.000 claims description 2
- AYOHIQLKSOJJQH-UHFFFAOYSA-N dibutyltin Chemical compound CCCC[Sn]CCCC AYOHIQLKSOJJQH-UHFFFAOYSA-N 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 230000032683 aging Effects 0.000 abstract description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 238000007664 blowing Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004604 Blowing Agent Substances 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- KXLNRTHAZOEDNA-UHFFFAOYSA-N dibutyl(didodecyl)stannane Chemical compound CCCCCCCCCCCC[Sn](CCCC)(CCCC)CCCCCCCCCCCC KXLNRTHAZOEDNA-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- MTZUIIAIAKMWLI-UHFFFAOYSA-N 1,2-diisocyanatobenzene Chemical compound O=C=NC1=CC=CC=C1N=C=O MTZUIIAIAKMWLI-UHFFFAOYSA-N 0.000 description 1
- OVBFMUAFNIIQAL-UHFFFAOYSA-N 1,4-diisocyanatobutane Chemical compound O=C=NCCCCN=C=O OVBFMUAFNIIQAL-UHFFFAOYSA-N 0.000 description 1
- VZXPHDGHQXLXJC-UHFFFAOYSA-N 1,6-diisocyanato-5,6-dimethylheptane Chemical compound O=C=NC(C)(C)C(C)CCCCN=C=O VZXPHDGHQXLXJC-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a preparation method of buoyancy cotton, which comprises the steps of mixing raw materials and additives of the buoyancy cotton, foaming the mixture in a foaming mold provided with a supporting rod to form the buoyancy cotton with a through middle through hole inside, and adhering a flame retardant and hardening the surface of the buoyancy cotton in a hardening mold to ensure that the final buoyancy cotton has better elasticity, and the surface of the buoyancy cotton can be still prevented from being ignited by flame within a certain time under the condition of encountering open fire, and can block the propagation of flame, and the surface of the buoyancy cotton has better dent resistance through multilayer preliminary aging of the surface. The invention also discloses a buoyancy cotton material prepared by the buoyancy cotton preparation method. Compared with the prior art, the technical scheme of the invention can effectively improve the elasticity, durability and flame retardant property of the buoyancy sponge, so that the buoyancy sponge has better use value.
Description
Technical Field
The invention relates to the technical field of buoyancy sponge production, in particular to a buoyancy sponge preparation method and buoyancy sponge.
Background
With the economic development and the continuous improvement of the living standard of people, people increasingly want to have high-quality living, so that soft materials such as sponge are generally adopted as main fabrics for living goods such as sofas and mattresses in the market, or are used as sub-layer fabrics which can be contacted by people, and the like.
However, after long-term use, the sponge structure is usually subjected to the bad phenomena of collapse or surface cracking and the like at the frequent use or frequent contact position of a user, and the reason is mainly because the sponge produced by the corresponding formula does not have good durability or has poor elastic recovery capability.
Meanwhile, the daily necessities frequently used by people contain a large amount of sponge materials, and the sponge materials are usually polyurethane materials, if people accidentally contact a fire source in the use process, the fire can be quickly burnt or accidents which are difficult to control can be generated, and the flame retardant property of the sponge materials is also very important.
Therefore, the sponge material components and the corresponding production process in the prior art are improved, so that the sponge product produced by the corresponding formula has better elasticity, durability and flame retardant property, and is very significant.
Disclosure of Invention
The invention mainly aims to provide a preparation method of buoyancy cotton and the buoyancy cotton, which aim to improve the elasticity, durability and flame retardant property of the sponge and enable the sponge to have better use value.
In order to achieve the above purpose, the invention provides a buoyancy cotton preparation method, which comprises the following steps:
step S1: the buoyancy cotton raw materials and additives are mixed and added into a foaming mold which can be closed up and down, and a cavity in the mold is provided with a plurality of support rods which are longitudinally arranged;
step S2: gradually foaming and forming and filling gaps of supporting rods, wherein the supporting rods penetrate through the upper surface and the lower bottom surface of the buoyancy cotton and form middle through holes;
step S3: taking out the buoyancy cotton after foaming from the foaming mould and transferring the buoyancy cotton into a hardening mould;
step S4: the buoyancy cotton is placed on the top surface of the bottom plate in the hardening die, a lifting top plate is arranged above the inside of the hardening die, the bottom plate and the lifting top plate are of a longitudinal hollow structure, and the hollow structure does not shield the middle through hole;
step S5: the lifting top plate moves downwards, pushes the buoyancy cotton to the bottom plate and compresses, a plurality of atomization spray heads are arranged in the hardening die, the atomized flame retardant solution is continuously sprayed to the surface of the buoyancy cotton, and the height of the lifting top plate is gradually increased;
step S6: after spraying the solution of the atomized flame retardant, the bottom plate and the lifting top plate reciprocate relatively and squeeze and compress the buoyancy cotton, and the water of the buoyancy cotton flows out;
step S7: under the static extrusion state, the buoyancy cotton subjected to extrusion and dehydration is blown with hot air to the surface of the buoyancy cotton through a hot air port arranged in the hardening die, the compression degree of the buoyancy cotton is reduced along with the time change, and the surface moisture of the buoyancy cotton is dried in a space of 10-20 ℃ after the buoyancy cotton is dried by the hot air.
Preferably, in the step S1, the additive includes a foaming agent, a surfactant, a catalyst, and a filler.
Preferably, the foaming agent is water, the surfactant is polyether siloxane, the catalyst is tetraethyl ethylenediamine, and the filler is silica.
Preferably, in the step S5, the flame retardant comprises 25-35% of ammonium polyphosphate powder, 30-45% of ammonium sulfate powder, 20-35% of a polymeric dispersant and 30-35% of ammonia water.
Preferably, the ammonium polyphosphate powder, the ammonium sulfate powder and the polymeric dispersant are mixed and stirred at a stirring speed of 800-1000rpm for more than 30 minutes to form a first mixture;
adding 30-35% ammonia water into the first mixture, stirring for more than 30 minutes at 1500-3000rpm, keeping at 8-15 ℃ for more than 12 hours, and adding distilled water to form a second mixture;
the second mixture was stirred using a rotation speed of 500-1000rpm and the stirring time exceeded 30 minutes, eventually forming a solution of flame retardant.
The invention also provides buoyancy cotton prepared by the buoyancy cotton preparation method, and the buoyancy cotton comprises, by mass, 50-60 parts of polymer polyol, 12-18 parts of polyglycerol, 20-22 parts of isocyanate, 1-5 parts of water, 0.8-3.7 parts of polyalkylsiloxane and an elasticity promoter.
Preferably, the polymer polyol is a polyether polyol comprising 30-35 parts of 3000 molecular weight polyether, 10-15 parts of 5000 molecular weight polyether, 5-10 parts of 8000 molecular weight polyether.
Preferably, the elasticity promoter is any one of stannous octoate, dilauryl dibutyl tin and tin naphthenate.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the technical scheme, the raw materials of the buoyancy cotton and the additives are mixed, the inside of the foaming mold provided with the supporting rods is foamed, the buoyancy cotton with the through holes in the middle is formed, and the buoyancy cotton is subjected to adhesion of the flame retardant and surface hardening in the hardening mold, so that the final buoyancy cotton has good elasticity, the surface can be still prevented from being ignited by flame within a certain time under the condition of encountering open fire, the propagation of flame can be blocked, and the surface is enabled to be better in dent resistance through multilayer preliminary aging of the surface.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for preparing buoyancy cotton according to the present invention;
FIG. 2 is a schematic diagram of the operation of the foaming process of the buoyancy cotton of the present invention;
FIG. 3 is a schematic diagram of the operation of the inventive buoyancy sponge fire retarding and hardening treatment.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the present invention provides a method for preparing a buoyancy sponge and a buoyancy sponge material using the method.
The preparation method of the buoyancy cotton comprises the following steps:
step S1: the buoyancy cotton is prepared by mixing raw materials and additives, adding the mixture into a foaming mold which can be closed up and down, and a cavity in the mold is provided with a plurality of support rods which are longitudinally arranged.
In the embodiment of the invention, the buoyancy cotton raw material components in the step S1 comprise 50-60 parts of polymer polyol, 12-18 parts of polyglycerol, 20-22 parts of isocyanate, 1-5 parts of water, 0.8-3.7 parts of polyalkylsiloxane and an elasticity promoter. Preferably, the polymer polyol of the embodiment of the invention is polyether polyol, wherein the polyether polyol comprises 30-35 parts of 3000 molecular weight polyether, 10-15 parts of 5000 molecular weight polyether and 5-10 parts of 8000 molecular weight polyether, and glycerin is used as an initiator, so that the final product of the buoyancy cotton can have proper surface hardness and high elasticity inside.
In the embodiment of the invention, the buoyancy cotton adopts isocyanate as the raw material of polyurethane products, and the isocyanate is used in the component range of 20-22 parts by reacting with substances such as water, polyglycerol and the like, so that the buoyancy cotton formed finally has higher flexibility inside. If the isocyanate is adopted below or above the proportion range, the internal elastic property of the buoyancy cotton material is too flexible or the hardness is too high, and finally the product performance requirement is not met.
Preferably, the isocyanate of the embodiment of the present invention may use one or more of methylene diphenyl diisocyanate, toluene diisocyanate, trimethyl hexamethylene diisocyanate, phenylene diisocyanate, dimethyl diphenyl diisocyanate, tetramethylene diisocyanate, and isophorone diisocyanate, or a mixture thereof.
In the embodiment of the invention, the components of the polyglycerol adopted by the buoyancy cotton are 12-18 parts, so that the buoyancy cotton has good fluidity in the foaming manufacturing process, and the buoyancy cotton still has an elastic internal structure after being completely solidified and molded. Preferably, in other embodiments of the present invention, the polyglycerol may be replaced with one or more of polyethylene glycol, polypropylene glycol, amine terminated polyether, polypropylene ether glycol, polypropylene ether ester glycol, polypropylene-co-ethylene ether glycol, polybutylene ether glycol, or mixtures thereof.
Preferably, in the embodiment of the invention, the polymer polyol in the buoyancy cotton component is polyether polyol, wherein the polyether polyol comprises 30-35 parts of 3000 molecular weight polyether, 10-15 parts of 5000 molecular weight polyether and 5-10 parts of 8000 molecular weight polyether.
In this example, the polyalkylsiloxane component is 0.8-3.7 parts, so that the internal elasticity of the final buoyancy cotton is further improved.
Preferably, the elasticity promoter of the embodiment is any one or a mixture of a plurality of stannous octoate, dilauryl dibutyl tin and tin naphthenate, so that the elasticity and tensile strength of the sponge can be obviously improved.
In addition, in the embodiment of the invention, the additive mixed with the buoyancy cotton raw material comprises a foaming agent, a surfactant, a catalyst and a filler.
Wherein the blowing agent of this embodiment is water, in other embodiments of the present invention, in addition to using water as the blowing agent, water may be used in combination with other blowing agents to effect co-blowing, such as one or more of n-pentane, isopentane, cyclopentane, methylene chloride.
The surfactant of the embodiment is polyether siloxane, and by using the surfactant, the surface tension is reduced, the miscibility of the whole solution is improved, the size of cells formed in the buoyancy cotton is uniform, the cell structure of the foaming composite material can be controlled to be stable, and the stability of the product is finally improved.
The catalyst of this example was tetraethyl diamine.
In addition to the silica, cerium oxide, calcium carbonate and the like can be used as the filler in the embodiment, and the surface hardness of the polyurethane sponge can be effectively improved by adding the filler in the additive, so that the bad phenomena of cracks and the like on the surface of an actual buoyancy sponge product after long-time use can be prevented.
Step S2: gradually foaming and forming and filling gaps of the support rods, and enabling the support rods to penetrate through the upper surface and the lower bottom surface of the buoyancy cotton and form middle through holes.
Because the mixed buoyancy cotton raw materials and additives are injected into the foaming mould in a flowing state and can flow through gaps of the densely arranged support rods, when the raw materials and additives are mixed and foamed, the foam materials can fill the gaps between adjacent support rods, and the buoyancy cotton after being completely solidified and formed is longitudinally formed with corresponding middle through holes so as to be matched with exhaust and adhesion of flame retardant solution in the subsequent hardening process.
Step S3: and taking out the buoyancy cotton after foaming from the foaming mold and transferring the buoyancy cotton into a hardening mold.
When the completely solidified buoyancy cotton needs to be demolded from the inside of the foaming mold, the lower mold of the foaming mold can be overturned, so that the solidified buoyancy cotton can be conveniently and downwards demolded from the lower mold by means of self gravity, and the demolding is realized.
Step S4: buoyancy cotton is placed on the top surface of the bottom plate in the hardening die, a lifting top plate is arranged above the inside of the hardening die, the bottom plate and the lifting top plate are of a longitudinal hollow structure, and the hollow structure does not shield the middle through hole.
Because the hardening mould of this embodiment is inside to be provided with the cavity to the below of hardening mould inside is provided with the bottom plate, and is provided with the lift roof in inside top, and this embodiment lift roof accessible sets up the electric telescopic push rod that passes the wallboard and links to each other with the lift roof, finally realizes the removal of lift roof in the vertical direction.
In addition, the bottom plate and the lifting top plate of the embodiment are of surface hollow structures, and the hollow structures can not mask the middle through holes of the longitudinal through buoyancy cotton, so that the subsequent compression and exhaust process of the compression buoyancy cotton is facilitated, and the corresponding flame retardant can enter the buoyancy cotton through the middle through holes.
Step S5: through lifting roof downwardly moving and pushing buoyancy cotton to the bottom plate and compressing, set up in the inside a plurality of atomizing shower heads of hardening mould, continuously spray the solution through atomizing fire retardant to buoyancy cotton surface, promote lifting roof height gradually.
Through going up and down the roof and remove to can mutually support between make up and down roof and the bottom plate, with carrying out the compression of vertical direction to buoyancy cotton, simultaneously, spray out fire retardant solution mutually through atomizer, can make fire retardant solution cover at the top surface, bottom surface and the side of buoyancy cotton. In addition, the buoyancy cotton of this embodiment is provided with a middle through hole in the longitudinal direction, so that the atomized flame retardant solution can also enter the buoyancy cotton internal structure through the middle through hole.
Finally, the buoyancy cotton sprayed by the atomized flame retardant solution has good flame retardant property on the surface and in the interior.
In the prior art, the flame retardant is directly mixed with the raw materials, and then the corresponding foaming operation is performed, so that the foaming cost is increased, and the final elastic performance of the buoyancy cotton can be reduced.
Preferably, in the embodiment, the flame retardant solution sprayed on the surface of the buoyancy cotton comprises 25-35% of ammonium polyphosphate powder, 30-45% of ammonium sulfate powder, 20-35% of high molecular dispersing agent and 30-35% of ammonia water.
The first mixture is formed by mixing ammonium polyphosphate powder, ammonium sulfate powder, and a polymeric dispersant and stirring the mixture at a stirring speed of 800-1000rpm for 30 minutes or more.
A second mixture is formed by adding 30-35% aqueous ammonia to the first mixture and stirring at 1500-3000rpm for more than 30 minutes, maintaining at 8-15 degrees Celsius for more than 12 hours, and then adding distilled water.
The second mixture was stirred using a rotation speed of 500-1000rpm and the stirring time exceeded 30 minutes, ultimately forming the flame retardant of this example.
Step S6: after spraying the solution of the atomized flame retardant, the bottom plate and the lifting top plate reciprocate relatively and squeeze and compress the buoyancy cotton, and the water of the buoyancy cotton flows out.
When the atomized fire retardant solution is sprayed, the buoyancy cotton is lifted or lowered continuously to raise the height of the top plate, so that the buoyancy cotton can be compressed continuously or loose-proof, the fire retardant solution staying on the surface of the buoyancy cotton can gradually enter the buoyancy cotton through the micro communication channel inside the buoyancy cotton, the buoyancy cotton is relatively in a static state to spray the solution, and the atomized solution can better and deeply enter the buoyancy cotton.
In addition, the actions of compressing and preventing the buoyancy cotton from loosening are synchronously carried out, so that the micro bubble cavities in the buoyancy cotton can be extruded and broken, the buoyancy cotton can have a breathing function, and the gas generated in the foaming manufacturing process can be discharged outwards to replace fresh gas, so that the buoyancy cotton has better air permeability finally and is more friendly to a human body in the subsequent use.
Step S7: under the static extrusion state, the buoyancy cotton subjected to extrusion and dehydration is blown with hot air to the surface of the buoyancy cotton through a hot air port arranged in the hardening die, the compression degree of the buoyancy cotton is reduced along with the time change, and the surface moisture of the buoyancy cotton is dried in a space of 10-20 ℃ after the buoyancy cotton is dried by the hot air.
In the embodiment of the invention, the surface and the surface of the central through hole of the buoyancy cotton sprayed with the flame retardant solution are provided with partial surface layer internal structures and the flame retardant solution stored therein, in order to dry the buoyancy cotton to a dry state, the inner wall plate of the hardening mould can be provided with corresponding blowing structures, the blowing structures can be arranged at corresponding positions in all directions of the buoyancy cotton, and the flame retardant solution originally adhered to the surface or the inside of the buoyancy cotton can be dried and reliably adhered to the inside of the buoyancy cotton by directly blowing hot air at 80-100 ℃ to the buoyancy cotton.
In addition, in the process of drying the buoyancy cotton, the height of the lifting top plate needs to be gradually increased, so that the buoyancy cotton is gradually prevented from being loosened in the drying process, and the surface of the buoyancy cotton can form a multi-layer hardened structure, so that the surface of the buoyancy cotton is not easy to collapse caused by aging after the buoyancy cotton is used for a long time later.
The buoyancy cotton subjected to hot air drying and hardening can achieve a slight aging effect on the surface by blowing cold air, so that the buoyancy cotton has a certain effect of inhibiting aging of the buoyancy cotton after long-term use.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (8)
1. The preparation method of the buoyancy cotton is characterized by comprising the following steps of:
step S1: the buoyancy cotton raw materials and additives are mixed and added into a foaming mold which can be closed up and down, and a cavity in the mold is provided with a plurality of support rods which are longitudinally arranged;
step S2: gradually foaming and forming and filling gaps of supporting rods, wherein the supporting rods penetrate through the upper surface and the lower bottom surface of the buoyancy cotton and form middle through holes;
step S3: taking out the buoyancy cotton after foaming from the foaming mould and transferring the buoyancy cotton into a hardening mould;
step S4: the buoyancy cotton is placed on the top surface of the bottom plate in the hardening die, a lifting top plate is arranged above the inside of the hardening die, the bottom plate and the lifting top plate are of a longitudinal hollow structure, and the hollow structure does not shield the middle through hole;
step S5: the lifting top plate moves downwards, pushes the buoyancy cotton to the bottom plate and compresses, a plurality of atomization spray heads are arranged in the hardening die, the atomized flame retardant solution is continuously sprayed to the surface of the buoyancy cotton, and the height of the lifting top plate is gradually increased;
step S6: after spraying the solution of the atomized flame retardant, the bottom plate and the lifting top plate reciprocate relatively and squeeze and compress the buoyancy cotton, and the water of the buoyancy cotton flows out;
step S7: under the static extrusion state, the buoyancy cotton subjected to extrusion and dehydration is blown with hot air to the surface of the buoyancy cotton through a hot air port arranged in the hardening die, the compression degree of the buoyancy cotton is reduced along with the time change, and the surface moisture of the buoyancy cotton is dried in a space of 10-20 ℃ after the buoyancy cotton is dried by the hot air.
2. The method of preparing a buoyant cotton according to claim 1, wherein in step S1, the additive comprises a foaming agent, a surfactant, a catalyst, and a filler.
3. The method for preparing the buoyancy cotton according to claim 2, wherein the foaming agent is water, the surfactant is polyether siloxane, the catalyst is tetraethyl ethylenediamine, and the filler is silicon dioxide.
4. The method for preparing the buoyancy cotton according to claim 1, wherein in the step S5, the flame retardant comprises 25-35% of ammonium polyphosphate powder, 30-45% of ammonium sulfate powder, 20-35% of a polymer dispersant and 30-35% of ammonia water.
5. The method according to claim 4, wherein the first mixture is formed by mixing the ammonium polyphosphate powder, the ammonium sulfate powder, and the polymer dispersant and stirring the mixture at a stirring speed of 800 to 1000rpm for more than 30 minutes;
adding 30-35% ammonia water into the first mixture, stirring for more than 30 minutes at 1500-3000rpm, keeping at 8-15 ℃ for more than 12 hours, and adding distilled water to form a second mixture;
the second mixture was stirred using a rotation speed of 500-1000rpm and the stirring time exceeded 30 minutes, eventually forming a solution of flame retardant.
6. The buoyancy cotton prepared by the method according to any one of claims 1 to 5, wherein the raw materials of the buoyancy cotton comprise, by mass, 50-60 parts of polymer polyol, 12-18 parts of polyglycerol, 20-22 parts of isocyanate, 1-5 parts of water, 0.8-3.7 parts of polyalkylsiloxane and an elasticity promoter.
7. The buoyant cotton of claim 6, wherein the polymer polyol is a polyether polyol comprising from 30 to 35 parts of a 3000 molecular weight polyether, from 10 to 15 parts of a 5000 molecular weight polyether, and from 5 to 10 parts of a 8000 molecular weight polyether.
8. The buoyant cotton of claim 6, wherein the elasticity promoter is any one of stannous octoate, dibutyl tin dilauryl, and tin naphthenate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311861158.3A CN117818122A (en) | 2023-12-31 | 2023-12-31 | Preparation method of buoyancy cotton and buoyancy cotton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311861158.3A CN117818122A (en) | 2023-12-31 | 2023-12-31 | Preparation method of buoyancy cotton and buoyancy cotton |
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| Publication Number | Publication Date |
|---|---|
| CN117818122A true CN117818122A (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311861158.3A Pending CN117818122A (en) | 2023-12-31 | 2023-12-31 | Preparation method of buoyancy cotton and buoyancy cotton |
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| Country | Link |
|---|---|
| CN (1) | CN117818122A (en) |
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2023
- 2023-12-31 CN CN202311861158.3A patent/CN117818122A/en active Pending
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