CN115073828B - Emulsion foaming product and preparation method thereof - Google Patents
Emulsion foaming product and preparation method thereof Download PDFInfo
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- CN115073828B CN115073828B CN202210746071.0A CN202210746071A CN115073828B CN 115073828 B CN115073828 B CN 115073828B CN 202210746071 A CN202210746071 A CN 202210746071A CN 115073828 B CN115073828 B CN 115073828B
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- 238000005187 foaming Methods 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title description 3
- 239000000839 emulsion Substances 0.000 title description 2
- 239000004816 latex Substances 0.000 claims abstract description 80
- 229920000126 latex Polymers 0.000 claims abstract description 80
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000006260 foam Substances 0.000 claims abstract description 57
- 239000004088 foaming agent Substances 0.000 claims abstract description 46
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 239000003349 gelling agent Substances 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 5
- 230000000996 additive effect Effects 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 43
- 238000002156 mixing Methods 0.000 claims description 24
- 239000006185 dispersion Substances 0.000 claims description 18
- 229920001821 foam rubber Polymers 0.000 claims description 15
- 238000004073 vulcanization Methods 0.000 claims description 14
- -1 sodium fluorosilicate Chemical compound 0.000 claims description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 238000009775 high-speed stirring Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 229940065859 sodium cocoyl glycinate Drugs 0.000 claims description 6
- IKGKWKGYFJBGQJ-UHFFFAOYSA-M sodium;2-(dodecanoylamino)acetate Chemical group [Na+].CCCCCCCCCCCC(=O)NCC([O-])=O IKGKWKGYFJBGQJ-UHFFFAOYSA-M 0.000 claims description 6
- WMVSVUVZSYRWIY-UHFFFAOYSA-N [(4-benzoyloxyiminocyclohexa-2,5-dien-1-ylidene)amino] benzoate Chemical compound C=1C=CC=CC=1C(=O)ON=C(C=C1)C=CC1=NOC(=O)C1=CC=CC=C1 WMVSVUVZSYRWIY-UHFFFAOYSA-N 0.000 claims description 3
- 150000002978 peroxides Chemical class 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 abstract description 17
- 150000001413 amino acids Chemical class 0.000 abstract description 12
- 125000003275 alpha amino acid group Chemical group 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000000638 stimulation Effects 0.000 abstract description 4
- 235000001014 amino acid Nutrition 0.000 description 17
- 238000001035 drying Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 8
- 238000005406 washing Methods 0.000 description 8
- 230000036541 health Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 5
- 229960003237 betaine Drugs 0.000 description 5
- 238000002386 leaching Methods 0.000 description 5
- MLICVSDCCDDWMD-KVVVOXFISA-M potassium;(z)-octadec-9-enoate Chemical compound [K+].CCCCCCCC\C=C/CCCCCCCC([O-])=O MLICVSDCCDDWMD-KVVVOXFISA-M 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 229940096992 potassium oleate Drugs 0.000 description 4
- 238000010025 steaming Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 238000010981 drying operation Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 229940083542 sodium Drugs 0.000 description 2
- KSAVQLQVUXSOCR-UHFFFAOYSA-M sodium lauroyl sarcosinate Chemical compound [Na+].CCCCCCCCCCCC(=O)N(C)CC([O-])=O KSAVQLQVUXSOCR-UHFFFAOYSA-M 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- IWLXWEWGQZEKGZ-UHFFFAOYSA-N azane;zinc Chemical compound N.[Zn] IWLXWEWGQZEKGZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- VAKMIIPDYZXBEV-DPMBMXLASA-M potassium;(z,12r)-12-hydroxyoctadec-9-enoate Chemical compound [K+].CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O VAKMIIPDYZXBEV-DPMBMXLASA-M 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 108700004121 sarkosyl Proteins 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003860 sleep quality Effects 0.000 description 1
- 229940045885 sodium lauroyl sarcosinate Drugs 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-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
- C08J9/14—Working-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
- C08J9/142—Compounds containing oxygen but no halogen atom
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2307/00—Characterised by the use of natural rubber
- C08J2307/02—Latex
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention provides a latex foaming product, and belongs to the technical field of latex products. The latex foaming product provided by the invention is obtained by foaming the following raw materials in parts by weight: 100 parts of natural latex; 3-6 parts of foaming agent; 5-8 parts of vulcanizing agent; 4-7 parts of a gelling additive; 3-5 parts of a gelling agent; the foaming agent is an amino acid surfactant. The invention takes the amino acid surfactant as the foaming agent to reduce the surface tension of the system solution, the foaming agent foams quickly, the foam quantity is large, the stability is good, and the synthesized latex product has loose pore canal and better softness and air permeability. Meanwhile, because the amino acid type surfactant has the characteristics of bacteriostasis, skin friendliness, no stimulation and the like, the latex product is healthier to human body, and the quality of the latex product is greatly improved.
Description
Technical Field
The invention relates to the technical field of latex products, in particular to a latex foaming product and a preparation method thereof.
Background
In recent years, with the economic development and the improvement of the living standard of people, people have higher requirements on sleep quality after the diligent work, and the appearance of latex products is favored by people. Latex products such as latex pillows, latex mattresses and the like gradually become health products for people to heat.
At present, the production of latex products is usually carried out by the Dunlop method, which is invented by the English man in the last century, namely 1929, and is a porous and closed-pore structure latex foaming product which is prepared by preparing, foaming, gelling, shaping, vulcanizing, washing, leaching, spin-drying and drying natural latex, such as a vulcanizing agent, a vulcanization accelerator, an anti-aging agent, a stabilizer, a foaming agent, a gelling agent) and other materials special for the latex, namely the latex sponge commonly known by people. Foaming is an important link in the process of preparing a latex product, and the quality of foaming performance can directly influence the size and uniformity of air holes of the latex product, thereby influencing the performance of the whole latex product.
At present, the most commonly used foaming agents in the domestic latex product factories are potassium oleate and potassium ricinoleate, but the two foaming agents have the problems of easy acceleration of color change and aging of the latex product, increased smell of the latex product and the like, the problems influence the health of a human body, seriously influence the quality improvement of the latex product, and the problem needs to be solved. In addition, the existing foaming agent has the problem that the foaming performance cannot meet the requirement. For example, in the chinese patent with publication number CN103611464a and entitled "a compound foaming agent of amphoteric-anionic surfactant and method for measuring foam stabilizing performance thereof", betaine amphoteric surfactant and sodium dodecyl sulfate anionic surfactant are compounded, and then a certain foam stabilizer is added, so that the foaming performance and foam stabilizing performance are good, but the foaming multiple of the foaming agent is greatly affected by the foam stabilizer, resulting in poor foaming performance.
In view of the above, there is a need to provide a latex foamed product which has good foaming properties and is more friendly to human health.
Disclosure of Invention
The invention aims to provide a latex foam product which has good foaming performance and is more friendly to human health and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a latex foaming product which is prepared from the following raw materials in parts by weight:
100 parts of natural latex;
3-6 parts of foaming agent;
5-8 parts of vulcanizing agent;
4-7 parts of a gelling additive;
3-5 parts of a gelling agent;
the foaming agent is an amino acid surfactant.
Preferably, the amino acid surfactant comprises one or more of tetradecyl betaine, sodium cocoyl glycinate, and sodium lauroyl amino acid.
Preferably, the vulcanizing agent comprises a sulfur dispersion, diisopropane peroxide, dibenzoylquinone dioxime.
Preferably, the gelling aid is a zinc oxide dispersion.
Preferably, the gelling agent comprises a sodium fluorosilicate dispersion, acetic acid or hydrochloric acid.
The invention also provides a preparation method of the latex foaming product, which comprises the following steps:
(1) Mixing natural latex with a foaming agent to obtain foaming natural latex;
(2) Sequentially stirring and mixing the foaming natural latex obtained in the step (1) with a vulcanizing agent, a gelling aid and a gelling agent at a high speed, and uniformly stirring and foaming at a low speed to obtain mixed foam;
(3) And (3) vulcanizing the mixed foam obtained in the step (2) to obtain a latex foam product.
Preferably, the mixing in step (1) is performed under stirring conditions; the stirring speed is 300-400 rpm.
Preferably, the rotation speed of the high-speed stirring and mixing in the step (2) is 300-400 rpm.
Preferably, the rotation speed of the low-speed stirring homogenization in the step (2) is 100-120 rpm.
Preferably, the vulcanization in the step (3) comprises the steps of firstly keeping the mixed foam in an oven at 100-120 ℃ for 3-5 min and then carrying out steam vulcanization at 90-100 ℃, wherein the steam vulcanization time is 15-20 min for a steam box.
The invention provides a latex foaming product which is prepared from the following raw materials in parts by weight: 100 parts of natural latex; 3-6 parts of foaming agent; 5-8 parts of vulcanizing agent; 4-7 parts of a gelling additive; 3-5 parts of a gelling agent; the foaming agent is an amino acid surfactant. The amino acid surfactant is used as the foaming agent, so that the surface tension of a system solution can be reduced, the foaming agent foams quickly, the foam quantity is large, the stability is good, the pore canal of the synthesized latex product is loose, and the softness and the air permeability are better; meanwhile, because the amino acid type surfactant has the characteristics of bacteriostasis, skin friendliness, no stimulation and the like, the latex product is healthier to human body, and the quality of the latex product is greatly improved. The results of the examples show that the foaming height of the latex foaming product provided by the invention can reach 4.2cm, and the foaming effect is superior to that of the latex product when potassium oleate is used as a foaming agent; in addition, the amino acid surfactant has the characteristics of bacteriostasis, skin friendliness, no stimulation and the like, so that the latex foam product is more friendly to human health when in use.
The preparation method of the latex foaming product provided by the invention is simple to operate, mild in reaction condition and suitable for large-scale production.
Detailed Description
The invention provides a latex foaming product which is prepared from the following raw materials in parts by weight:
100 parts of natural latex;
3-6 parts of foaming agent;
5-8 parts of vulcanizing agent;
4-7 parts of a gelling additive;
3-5 parts of a gelling agent;
the foaming agent is an amino acid surfactant.
In the invention, the raw materials for preparing the latex foam product comprise 100 parts of natural latex by weight. In the invention, the natural latex provides a latex base material for a latex foaming product, has mild colloid property and skin friendliness, can naturally relieve fever, is safe and pollution-free, meets the requirement of environmental protection, and is more friendly to human health. The source of the natural latex is not particularly limited, and commercially available products known to those skilled in the art may be used.
In the invention, the raw materials for preparing the latex foaming product comprise 3-6 parts of foaming agent, preferably 4-5 parts, based on 100 parts by weight of natural latex. In the invention, the foaming agent can reduce the surface tension of the system solution, so that the natural latex is uniformly dispersed and stable foam is formed.
In the present invention, the foaming agent is an amino acid surfactant. In the present invention, the amino acid surfactant preferably includes one or more of tetradecyl betaine, sodium cocoyl glycinate, and sodium lauroyl aminoacid, more preferably sodium cocoyl glycinate or sodium lauroyl aminoacid. The source of the amino acid surfactant is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the invention, the amino acid surfactant can reduce the surface tension of a system solution, the foaming agent foams quickly, the foam quantity is large, the stability is good, and the synthesized latex product has loose pore channels and better softness and air permeability.
In the invention, the raw materials for preparing the latex foaming product comprise 5-8 parts of vulcanizing agent, preferably 6-7 parts, based on 100 parts by weight of natural latex. In the invention, the vulcanizing agent can be matched with natural latex to cure the latex, so that the latex product has proper strength and elasticity.
The kind of the vulcanizing agent is not particularly limited, and vulcanizing agents known to those skilled in the art may be used. In the present invention, the vulcanizing agent preferably includes a sulfur dispersion, diisopropane peroxide, dibenzoylquinone dioxime, and more preferably a sulfur dispersion. In the present invention, when the kind of the vulcanizing agent is in the above range, it is more advantageous to provide the latex product with appropriate strength and elasticity so as to satisfy the use requirement of the latex product. The source of the sulfur dispersion is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used.
In the invention, the raw materials for preparing the latex foaming product comprise 4-7 parts of gelling aid, preferably 5-6 parts, based on 100 parts by weight of natural latex. In the present invention, the gelling aid is preferably a zinc oxide dispersion; the particle size of the zinc oxide dispersion is preferably 800 to 1250 mesh. In the present invention, the zinc oxide dispersion is capable of reacting with ammonia in the latex to form a zinc ammonia complex as a gelling agent to gel the latex. The source of the zinc oxide dispersion is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used.
In the present invention, the raw material for preparing the latex foam product comprises 3 to 5 parts of a gelling agent, preferably 4 to 5 parts, based on 100 parts by weight of natural latex. In the present invention, the gellant is capable of setting the latex. In the present invention, the gelling agent preferably comprises a sodium fluorosilicate dispersion, acetic acid or hydrochloric acid, more preferably a sodium fluorosilicate dispersion. In the invention, the gelling agent is sodium fluosilicate dispersoid, which is more beneficial to improving the solidification effect of the latex. The source of the sodium fluorosilicate dispersion is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used.
The amino acid surfactant is used as the foaming agent, so that the surface tension of the system solution can be reduced, the foaming agent foams quickly, the foam quantity is large, the stability is good, the pore canal of the synthesized latex product is loose, and the softness and the air permeability are better; meanwhile, the amino acid type surfactant has the characteristics of bacteriostasis, skin friendliness, no irritation and the like.
The invention also provides a preparation method of the latex foaming product, which comprises the following steps:
(1) Mixing natural latex with a foaming agent to obtain foaming natural latex;
(2) Sequentially stirring and mixing the foaming natural latex obtained in the step (1) with a vulcanizing agent, a gelling aid and a gelling agent at a high speed, and uniformly stirring and foaming at a low speed to obtain mixed foam;
(3) And (3) vulcanizing the mixed foam obtained in the step (2) to obtain a latex foam product.
The invention mixes natural latex with foaming agent to obtain foaming natural latex.
In the present invention, the natural latex and the foaming agent are preferably mixed by stirring, and the rotation speed of the mechanical stirring is preferably 300 to 400rpm, more preferably 350 to 400rpm; the time of the mechanical stirring is preferably 4 to 7 minutes, more preferably 5 minutes. In the present invention, the mixing operation is such that the natural latex and the foaming agent are sufficiently mixed and a large amount of bubbles are formed, whereby a sufficiently foamed natural latex is obtained.
The device for mixing the natural latex with the foaming agent is not particularly limited, and a mixing device known to those skilled in the art may be used to allow the rotation speed to reach the above range. In the present invention, the mixing device is preferably a blender, which is preferably a commercial eggbeater.
After the foaming natural latex is obtained, the foaming natural latex, the vulcanizing agent, the gelling aid and the gelling agent are sequentially subjected to high-speed stirring and mixing and low-speed stirring and homogenizing to obtain mixed foam.
In the present invention, the rotation speed of the high-speed stirring and mixing is preferably 300 to 400rpm, more preferably 350 to 400rpm; the time of the high-speed stirring is preferably 4 to 5 minutes, more preferably 4 minutes. In the present invention, the high-speed agitation mixing is capable of thoroughly mixing the foamed natural latex with the vulcanizing agent, the gelling aid and the gelling agent and forming a large number of bubbles.
In the present invention, the operation of stirring and mixing the foamed natural latex with the vulcanizing agent, the gelling aid and the gelling agent at a high speed is preferably: the foaming natural latex, the vulcanizing agent and the gelling aid are stirred at a first high speed, and then the gelling agent is added for stirring at a second high speed. In the present invention, the time of the first high-speed stirring is preferably 2 to 4 minutes, more preferably 3 minutes; the time of the second high-speed stirring is preferably 1 to 2 minutes, more preferably 1 minute. In the invention, when the feeding sequence of the foaming natural latex, the vulcanizing agent, the gelling aid and the gelling agent which are stirred at high speed is of the above type, the foaming natural latex, the vulcanizing agent, the gelling aid and the gelling agent can be promoted to be mixed more uniformly, and the foaming is more sufficient.
In the invention, the rotation speed of the low-speed stirring homogenizing is preferably 100-120 rpm, more preferably 110-120 rpm; the time for the low-speed homogenization is preferably 1 to 2 minutes, more preferably 1 minute. In the invention, the low-speed foam homogenizing can make the formed bubbles more uniform and improve the service performance of the latex foam product.
After the mixed foam is obtained, the mixed foam is vulcanized to obtain the latex foaming product.
The present invention preferably pours the blended foam into a mold prior to vulcanization, trowells the blended foam, weighs, and records the weight of the blended foam. In the invention, the mixed foam is poured into a mould, and the mixed foam is smoothed, weighed and the weight of the foam body is recorded, so that the data recording of the vulcanized latex foam product can be conveniently carried out.
In the present invention, the vulcanization preferably includes first holding the mixed foam at 100 to 120 ℃ for 3 to 5 minutes and then performing steam vulcanization at 90 to 100 ℃ for 15 to 20 minutes, more preferably first holding the mixed slurry at 120 ℃ for 5 minutes and then performing steam vulcanization at 100 ℃ for 18 to 20 minutes. In the present invention, when the distillation vulcanization is capable of supplementing moisture during vulcanization, and when the vulcanization parameters are within the above ranges, the latex can be sufficiently cured, ensuring that the latex product has proper strength and elasticity. The vulcanizing device of the present invention is not particularly limited, and the above temperature range can be achieved by using a heating device known to those skilled in the art. In the present invention, the vulcanizing device preferably includes an oven or a steam box.
After the vulcanization is completed, the invention preferably carries out post-treatment on the vulcanized system to obtain the latex foam product. In the present invention, the post-treatment includes demolding, washing and drying which are sequentially performed. In the present invention, the washing can remove unreacted raw materials, and the drying can remove washing reagents. The method of washing and drying operation is not particularly limited in the present invention, and washing and drying operation methods well known to those skilled in the art may be employed. In the present invention, the washing is preferably hot water rinsing, and the washing time is preferably 2min; the temperature of the drying is preferably 120 ℃, and the drying device is preferably an oven; the drying time is not particularly limited, and the latex product to be dried can be dried by adjusting the size of the latex product to be dried.
The preparation method provided by the invention comprises the steps of firstly mixing natural latex with a foaming agent to form foaming natural latex, then sequentially stirring the foaming natural latex with a vulcanizing agent, a gelling aid and a gelling agent at a high speed and homogenizing at a low speed to obtain mixed foam, and then vulcanizing the mixed foam to obtain a latex foaming product. The method provided by the invention is simple to operate, mild in reaction condition and suitable for large-scale production.
The technical solutions of the present invention will be clearly and completely described in the following in connection with the embodiments of the present invention. It will be apparent that the described embodiments 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.
Example 1
The latex foaming product is obtained by foaming the following raw materials in parts by weight: 100 parts of natural latex; 4 parts of sodium cocoyl glycinate serving as a foaming agent; 8 parts of vulcanizing agent sulfur dispersion; 5 parts of gelling aid zinc oxide dispersion and 5 parts of gelling agent sodium fluosilicate dispersion.
The preparation method of the latex foaming product comprises the following steps:
(1) Adding the natural latex and a foaming agent into a commercial eggbeater, and stirring at a rotation speed of 300rpm for 5min to mix to obtain foamed natural latex;
(2) Stirring the foaming natural latex obtained in the step (1) with a vulcanizing agent and a gelling aid at a high speed of 400rpm for 3min until the mixture is uniformly mixed, then stirring the obtained mixture with the gelling agent at a high speed of 400rpm for 1min, stirring at a low speed for 1min at a rotating speed of 120rpm, stopping stirring to obtain mixed foam, pouring the mixed foam into a mold from a material cylinder, trowelling the foam, weighing and recording the weight of the foam;
(3) Placing the die with the mixed foam obtained in the step (2) into a baking oven at 120 ℃ for 5min; taking the mold out of the electric oven, steaming in a steam box at 100 ℃ for 20min, vulcanizing, taking the mold out of the steam box, taking the formed latex product out of the mold, leaching with hot water for 2min, and drying in an oven at 120 ℃ to obtain the latex foaming product.
Example 2
The latex foaming product is obtained by foaming the following raw materials in parts by weight: 100 parts of natural latex; 4 parts of foaming agent sodium lauroyl sarcosinate; 8 parts of vulcanizing agent sulfur dispersion; 5 parts of gelling aid zinc oxide dispersion and 5 parts of gelling agent sodium fluosilicate dispersion.
The preparation method of the latex foaming product comprises the following steps:
(1) Adding the natural latex and a foaming agent into a commercial eggbeater, and stirring at a rotation speed of 300rpm for 5min to mix to obtain foamed natural latex;
(2) Stirring the foaming natural latex obtained in the step (1) with a vulcanizing agent and a gelling aid at a high speed of 400rpm for 3min until the mixture is uniformly mixed, then stirring the obtained mixture with the gelling agent at a high speed of 400rpm for 1min, stirring at a low speed for 1min at a rotating speed of 120rpm, stopping stirring to obtain mixed foam, pouring the mixed foam into a mold from a material cylinder, trowelling the foam, weighing and recording the weight of the foam;
(3) Placing the die with the mixed foam obtained in the step (2) into a baking oven at 120 ℃ for 5min; taking the mold out of the electric oven, steaming in a steam box at 100 ℃ for 20min, vulcanizing, taking the mold out of the steam box, taking the formed latex product out of the mold, leaching with hot water for 2min, and drying in an oven at 120 ℃ to obtain the latex foaming product.
Example 3
The latex foaming product is obtained by foaming the following raw materials in parts by weight: 100 parts of natural latex; 4 parts of foaming agent tetradecyl betaine; 8 parts of vulcanizing agent sulfur dispersion; 5 parts of gelling aid zinc oxide dispersion and 5 parts of gelling agent sodium fluosilicate dispersion.
The preparation method of the latex foaming product comprises the following steps:
(1) Adding the natural latex and a foaming agent into a commercial eggbeater, and stirring at a rotation speed of 300rpm for 5min to mix to obtain foamed natural latex;
(2) Stirring the foaming natural latex obtained in the step (1) with a vulcanizing agent and a gelling aid at a high speed of 400rpm for 3min until the mixture is uniformly mixed, then stirring the obtained mixture with the gelling agent at a high speed of 400rpm for 1min, stirring at a low speed for 1min at a rotating speed of 120rpm, stopping stirring to obtain mixed foam, pouring the mixed foam into a mold from a material cylinder, trowelling the foam, weighing and recording the weight of the foam;
(3) Placing the die with the mixed foam obtained in the step (2) into a baking oven at 120 ℃ for 5min; taking the mold out of the electric oven, steaming in a steam box at 100 ℃ for 20min, vulcanizing, taking the mold out of the steam box, taking the formed latex product out of the mold, leaching with hot water for 2min, and drying in an oven at 120 ℃ to obtain the latex foaming product.
Comparative example 1
The latex foaming product is obtained by foaming the following raw materials in parts by weight: 100 parts of natural latex; 4 parts of foaming agent potassium oleate; 8 parts of vulcanizing agent sulfur dispersion; 5 parts of gelling aid zinc oxide dispersion and 5 parts of gelling agent sodium fluosilicate dispersion.
The preparation method of the latex foaming product comprises the following steps:
(1) Adding the natural latex and a foaming agent into a commercial eggbeater, and stirring at a rotation speed of 300rpm for 5min to mix to obtain foamed natural latex;
(2) Stirring the foaming natural latex obtained in the step (1) with a vulcanizing agent and a gelling aid at a high speed of 400rpm for 3min until the mixture is uniformly mixed, then stirring the obtained mixture with the gelling agent at a high speed of 400rpm for 1min, stirring at a low speed for 1min at a rotating speed of 120rpm, stopping stirring to obtain mixed foam, pouring the mixed foam into a mold from a material cylinder, trowelling the foam, weighing and recording the weight of the foam;
(3) Placing the die with the mixed foam obtained in the step (2) into a baking oven at 120 ℃ for 5min; taking the mold out of the electric oven, steaming in a steam box at 100 ℃ for 20min, vulcanizing, taking the mold out of the steam box, taking the formed latex product out of the mold, leaching with hot water for 2min, and drying in an oven at 120 ℃ to obtain the latex foaming product.
Test example 1
The foaming heights of the latex foam products prepared in examples 1 to 3 and comparative example 1 were measured, and the measurement results are shown in table 1:
table 1: foam height of latex foam products prepared in examples 1 to 3 and comparative example 1
| Foaming agent | Height/cm | |
| Example 1 | Sodium cocoyl glycinate | 4 |
| Example 2 | Lauroyl sarcosine sodium salt | 4.2 |
| Example 3 | Tetradecyl betaine | 4.1 |
| Comparative example 1 | Oleic acid potassium salt | 3.8 |
As can be seen from Table 1, the foaming height of the latex foaming product provided by the invention is more than 4.0cm, can reach 4.2cm, and the foaming effect is superior to that of the latex product when potassium oleate is used as a foaming agent; in addition, the amino acid surfactant has the characteristics of bacteriostasis, skin friendliness, no stimulation and the like, so that the latex foam product is more friendly to human health when in use.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (6)
1. A latex foaming product is prepared from the following raw materials in parts by weight:
100 parts of natural latex;
3-6 parts of a foaming agent;
5-8 parts of vulcanizing agent;
4-7 parts of a gelling additive;
3-5 parts of a gelling agent;
the foaming agent is sodium cocoyl glycinate or sodium lauroyl amino acid;
the preparation method of the latex foaming product comprises the following steps:
(1) Mixing natural latex with a foaming agent to obtain foaming natural latex;
(2) Sequentially stirring and mixing the foaming natural latex obtained in the step (1) with a vulcanizing agent, a gelling aid and a gelling agent at a high speed, and uniformly stirring and foaming at a low speed to obtain mixed foam;
(3) Vulcanizing the mixed foam obtained in the step (2) to obtain a latex foaming product;
the mixing in the step (1) is carried out under stirring conditions; the stirring speed is 300-400 rpm;
the rotating speed of high-speed stirring and mixing in the step (2) is independently 300-400 rpm;
the rotation speed of the low-speed stirring and homogenizing in the step (2) is 100-120 rpm.
2. The latex foamed article according to claim 1, wherein said vulcanizing agent comprises a sulfur dispersion, diisopropane peroxide or dibenzoylquinone dioxime.
3. The latex foam article according to claim 1, wherein the gelling aid is a zinc oxide dispersion.
4. The latex foam article according to claim 1, wherein the gelling agent comprises a sodium fluorosilicate dispersion, acetic acid, or hydrochloric acid.
5. The method for preparing the latex foam product according to any one of claims 1 to 4, comprising the following steps:
(1) Mixing natural latex with a foaming agent to obtain foaming natural latex;
(2) Sequentially stirring and mixing the foaming natural latex obtained in the step (1) with a vulcanizing agent, a gelling aid and a gelling agent at a high speed, and uniformly stirring and foaming at a low speed to obtain mixed foam;
(3) Vulcanizing the mixed foam obtained in the step (2) to obtain a latex foaming product;
the mixing in the step (1) is carried out under stirring conditions; the stirring speed is 300-400 rpm;
the rotating speed of high-speed stirring and mixing in the step (2) is independently 300-400 rpm;
the rotation speed of the low-speed stirring and homogenizing in the step (2) is 100-120 rpm.
6. The method for preparing a foamed latex product according to claim 5, wherein the vulcanization in the step (3) comprises the steps of holding the mixed foam in an oven at 100-120 ℃ for 3-5 min, and then performing steam vulcanization at 90-100 ℃ for 15-20 min.
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| JP2015227431A (en) * | 2014-06-02 | 2015-12-17 | 株式会社イノアック技術研究所 | Production method of latex foam |
| JP2016033172A (en) * | 2014-07-30 | 2016-03-10 | 株式会社イノアック技術研究所 | Production method of latex foam |
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| AU2020102627A4 (en) * | 2020-10-07 | 2020-11-26 | Agricultural Products Processing Research Institute，China Academy of Tropical Agricultural Sciences | Latex foaming sponge capable of promoting sleep and preparation method and application thereof |
| WO2021253630A1 (en) * | 2020-06-16 | 2021-12-23 | 浙江天盛汽车配件有限公司 | Wear-resistant foam automobile mat and preparation method |
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| FR2913350B1 (en) * | 2007-03-08 | 2010-05-21 | Rhodia Recherches & Tech | USE OF BETAINE AS FOAMING AGENT AND FOAM DRAIN REDUCTION AGENT |
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| JP2016033172A (en) * | 2014-07-30 | 2016-03-10 | 株式会社イノアック技術研究所 | Production method of latex foam |
| CN107652482A (en) * | 2017-10-18 | 2018-02-02 | 德清舒华泡沫座椅有限公司 | A kind of degradable high-elastic sponge and its preparation technology |
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