CN109943060B - Soft foaming sponge for seat and preparation method thereof - Google Patents
Soft foaming sponge for seat and preparation method thereof Download PDFInfo
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- CN109943060B CN109943060B CN201910236604.9A CN201910236604A CN109943060B CN 109943060 B CN109943060 B CN 109943060B CN 201910236604 A CN201910236604 A CN 201910236604A CN 109943060 B CN109943060 B CN 109943060B
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- 238000005187 foaming Methods 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 81
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000012948 isocyanate Substances 0.000 claims abstract description 47
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 47
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims abstract description 46
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 42
- 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 23
- 239000003063 flame retardant Substances 0.000 claims abstract description 23
- 229920001971 elastomer Polymers 0.000 claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 claims abstract description 21
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 19
- 229920000570 polyether Polymers 0.000 claims abstract description 19
- 229920002545 silicone oil Polymers 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 229920005862 polyol Polymers 0.000 claims abstract description 6
- 150000003077 polyols Chemical class 0.000 claims abstract description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Natural products CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 5
- -1 bis-dimethylamino ethyl Chemical group 0.000 claims abstract description 5
- GTEXIOINCJRBIO-UHFFFAOYSA-N 2-[2-(dimethylamino)ethoxy]-n,n-dimethylethanamine Chemical compound CN(C)CCOCCN(C)C GTEXIOINCJRBIO-UHFFFAOYSA-N 0.000 claims description 26
- 238000013329 compounding Methods 0.000 claims description 21
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 12
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 9
- 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 claims description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 8
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 8
- 239000000806 elastomer Substances 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 8
- 239000010452 phosphate Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 8
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 230000001476 alcoholic effect Effects 0.000 description 6
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 6
- 230000002950 deficient Effects 0.000 description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000012974 tin catalyst Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
A preparation method of a soft foaming sponge for a seat comprises the following steps: step (1): mixing the isocyanate component and the toluene diisocyanate component according to a ratio, and uniformly stirring to obtain a black material; mixing polyether polyol, triethylene diamine solution, bis-dimethylamino ethyl ether solution, silicone oil, triethanolamine, a flame retardant and water according to a ratio, and uniformly stirring to obtain a white material; step (2): preheating a mould to enable the mould to be stable and constant at 50-55 ℃, placing all the seat back iron frame in the mould in advance, placing two ends of the iron frame in the mould completely, sealing the edge positions of the two ends of the iron frame placed in the mould, and then injecting black materials and white materials into the mould according to the proportion; and (3): after the black material and the white material are injected into the mold, the mold cover is covered, sealing rubber is filled between the mold and the mold cover, the clamp is locked, and the mold is sealed; and (4): and (3) controlling the pressure in the mould to be kept at 1.5Pa, foaming for 3-5 minutes, and then opening the mould to obtain the soft foaming sponge.
Description
Technical Field
The invention relates to the technical field of sponge production, in particular to a soft foaming sponge for a seat and a preparation method thereof.
Background
The currently commonly used sponges are classified into three types, namely high-density sponges, medium-density sponges and low-density sponges according to the structure. The sponge with high density has a plurality of holes, is full and has better air permeability and elasticity; sponge products have become popular in people's lives, and among them, there are household articles such as chairs, sofas, mattresses, etc. made of sponge.
However, when the existing soft foaming sponge for the seat is used in the processing process, the seat back iron frame is usually required to be put into a mold, and then foaming raw materials are poured into the mold, so that the sponge is generated by taking the seat back iron frame as a base frame, and subsequent seat production is facilitated. However, in the actual production process, because the both sides of seat back iron stand stretch out outside the mould to the sponge mould leakproofness is poor, and pressure and temperature in the mould are unstable, make the sponge product surface that the sponge mould produced not smooth enough, the honeycomb phenomenon can appear in some products even, thereby lead to the appearance of waste product and substandard product, and the staff need take the seat back iron stand apart with the sponge again, and the arrangement is clean just repeatedly used, has reduced production efficiency.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method of a soft foaming sponge for a seat, which has the advantages of improving the yield and the production efficiency.
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of a soft foaming sponge for a seat is characterized by comprising the following steps: the method comprises the following steps:
step (1): mixing the isocyanate component and the toluene diisocyanate component according to a ratio, and uniformly stirring to obtain a black material;
mixing polyether polyol, triethylene diamine solution, bis-dimethylamino ethyl ether solution, silicone oil, triethanolamine, a flame retardant and water according to a ratio, and uniformly stirring to obtain a white material;
step (2): preheating a mould to enable the mould to be stable and constant at 50-55 ℃, placing all the seat back iron frame in the mould in advance, placing two ends of the iron frame in the mould completely, sealing the edge positions of the two ends of the iron frame placed in the mould, and then injecting black materials and white materials into the mould according to the proportion;
and (3): after the black material and the white material are injected into the mold, the mold cover is covered, sealing rubber is filled between the mold and the mold cover, the mold is locked by using a clamp, and the mold is sealed;
and (4): controlling the pressure in the mold to be kept at 1.5Pa, foaming for 3-5 minutes, and then opening the mold to obtain soft foaming sponge;
the sealing rubber is thermoplastic polyurethane elastomer rubber.
The soft foaming sponge comprises raw materials of black materials and white materials, wherein the weight ratio of the black materials is 30-35 parts, the weight ratio of the white materials is 65-70 parts, and the sum of the black materials and the white materials is 100 parts;
the black material comprises an isocyanate component and a toluene diisocyanate component, wherein the isocyanate component and the toluene diisocyanate component are arranged according to the weight ratio of 3: 1.5-2;
the white material comprises the following components in parts by weight:
95-105 parts of polyether polyol;
0.7-1.5 parts of triethylene diamine solution;
0.1-0.3 part of bis-dimethylamino ethyl ether solution;
0.5-1.5 parts of silicone oil;
1.0-1.5 parts of triethanolamine;
5-7 parts of a flame retardant;
3-4 parts of water.
The isocyanate component is formed by mixing isocyanate and diphenylmethane diisocyanate, and the viscosity of the isocyanate component at 25 ℃ is 150-250 mPa & s.
The toluene diisocyanate component is formed by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4: 1.
The polyether polyol is polyether diol or polyether triol.
By adopting the technical scheme, the thermoplastic polyurethane elastomer rubber has high strength, good elasticity, good environmental resistance and wear resistance, the glass transition temperature of the thermoplastic polyurethane elastomer rubber is higher than 100 ℃, the brittleness temperature of the thermoplastic polyurethane elastomer rubber is lower than-62 ℃, and the production temperature of the soft foaming sponge is concentrated at 50-55 ℃, so that the thermoplastic polyurethane elastomer rubber has long service life while ensuring the sealing property of a die;
after the sealing rubber material is filled in the die, the temperature and the pressure in the die are more stable, and the soft foaming sponge produced under the stable condition greatly reduces the generation of a honeycomb phenomenon and the generation of defective products and defective products; and the sponge directly forms on the backrest iron frame, is installing after comparing in a large amount of shaping in the sponge, has practiced thrift manufacturing procedure, and the surface of sponge is more level and smooth, and the staff need not to repair sponge product surface to avoid the pollution of glue to the product, improved production efficiency greatly.
Preferably, the raw materials of the soft foaming sponge comprise 33 parts of black materials and 67 parts of white materials;
the black material is prepared from the isocyanate component and the toluene diisocyanate component according to the weight ratio of 3: 2;
the white material comprises the following components in parts by weight:
100 parts of polyether glycol;
1.2 parts of a triethylene diamine solution;
0.1 part of dimethylamino ethyl ether solution;
0.9 part of silicone oil;
1.2 parts of triethanolamine;
6 parts of a flame retardant;
and 3.6 parts of water.
The flame retardant is prepared by mixing one or more of zinc borate, zinc oxide, iron oxide, red phosphorus, phosphate, carbonate and organic silicon.
The triethylene diamine solution is an alcohol solution with the mass fraction of 33%.
The dimethylamino ethyl ether solution is prepared by compounding dimethylamino ethyl ether with the mass fraction of 70% and dipropylene glycol with the mass fraction of 30%.
In conclusion, the beneficial technical effects of the invention are as follows:
according to the soft foaming sponge provided by the invention, the seat backrest iron frame is preheated and then integrally placed into the mold, the sealing treatment is carried out between the two ends of the iron frame in the mold and the mold, the mold is also sealed by using the thermoplastic polyurethane elastomer rubber, the sealing performance is effectively improved, the sponge is ensured to be subjected to foaming production in a sealed environment, the loss of raw materials is reduced in the sealed environment, meanwhile, the production condition in the mold is more stable and controllable, the surface of the soft foaming sponge is smoother, the generation of a honeycomb phenomenon is reduced, the yield is improved, the yield is kept above 95% and can reach 100% to the maximum extent, and the production efficiency is further improved.
Because the raw materials are poured into the sealed die by the preparation method, the loss of the raw materials required by the sealed die is reduced by 20 percent compared with that required by the unsealed die, and the loss cost is reduced.
Detailed Description
The present invention will be described in further detail with reference to examples.
The first embodiment is as follows:
a preparation method of a soft foaming sponge for a seat is characterized by comprising the following steps: the method comprises the following steps:
step (1): mixing the isocyanate component and the toluene diisocyanate component according to a ratio, and uniformly stirring to obtain a black material;
mixing polyether dihydric alcohol, triethylene diamine solution, dimethylamino ethyl ether solution, silicone oil, triethanolamine, a flame retardant and water according to a ratio, and uniformly stirring to obtain a white material;
step (2): preheating a mould to enable the mould to be stable and constant at 50-55 ℃, placing all the seat back iron frame in the mould in advance, placing two ends of the iron frame in the mould completely, sealing the edge positions of the two ends of the iron frame placed in the mould, and then injecting black materials and white materials into the mould according to the proportion;
and (3): after the black material and the white material are injected into the mold, the mold cover is covered, thermoplastic polyurethane elastomer rubber is filled between the mold and the mold cover, the mold is locked by using a clamp, and the mold is sealed;
and (4): controlling the pressure in the mold to be kept at 1.5Pa, foaming for 5 minutes, and then opening the mold to obtain the soft foaming sponge.
The soft foaming sponge for the seat comprises 33 parts of black materials and 67 parts of white materials by weight;
the black material comprises an isocyanate component and a toluene diisocyanate component, wherein the isocyanate component and the toluene diisocyanate component are arranged according to the weight ratio of 3: 2;
the isocyanate component is formed by mixing isocyanate and diphenylmethane diisocyanate, and the viscosity of the isocyanate component is 200mPa & s at 25 ℃;
the toluene diisocyanate component is formed by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4: 1;
the white material comprises the following components in parts by weight:
100 parts of polyether glycol;
1.2 parts of a triethylene diamine solution, wherein the triethylene diamine solution is an alcoholic solution with the mass fraction of 33%;
0.1 part of dimethylamino ethyl ether solution, wherein the dimethylamino ethyl ether solution is prepared by compounding 70 mass percent of dimethylamino ethyl ether solution and 30 mass percent of dipropylene glycol. (ii) a
0.9 part of silicone oil;
1.2 parts of triethanolamine;
6 parts of a flame retardant, wherein the flame retardant is prepared by compounding one or more of zinc borate, zinc oxide, ferric oxide, red phosphorus, phosphate, carbonate and organic silicon;
and 3.6 parts of water.
Example two:
the preparation method of the soft foaming sponge in this embodiment is the same as that of the first embodiment described above.
The soft foaming sponge for the seat comprises 33 parts of black materials and 67 parts of white materials by weight;
the black material comprises an isocyanate component and a toluene diisocyanate component, wherein the isocyanate component and the toluene diisocyanate component are arranged according to the weight ratio of 3: 1.5;
the isocyanate component is formed by mixing isocyanate and diphenylmethane diisocyanate, and the viscosity of the isocyanate component is 200mPa & s at 25 ℃;
the toluene diisocyanate component is formed by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4: 1;
the white material comprises the following components in parts by weight:
100 parts of polyether glycol;
1.2 parts of a triethylene diamine solution, wherein the triethylene diamine solution is an alcoholic solution with the mass fraction of 33%;
0.1 part of dimethylamino ethyl ether solution, wherein the dimethylamino ethyl ether solution is prepared by compounding 70 mass percent of dimethylamino ethyl ether solution and 30 mass percent of dipropylene glycol. (ii) a
0.5 part of silicone oil;
1 part of triethanolamine;
6 parts of a flame retardant, wherein the flame retardant is prepared by compounding one or more of zinc borate, zinc oxide, ferric oxide, red phosphorus, phosphate, carbonate and organic silicon;
and 3 parts of water.
Example three:
the preparation method of the soft foaming sponge in this embodiment is the same as that of the first embodiment described above.
The soft foaming sponge for the seat comprises raw materials of 30 parts by weight of black materials and 70 parts by weight of white materials;
the black material comprises an isocyanate component and a toluene diisocyanate component, wherein the isocyanate component and the toluene diisocyanate component are arranged according to the weight ratio of 3: 2;
the isocyanate component is formed by mixing isocyanate and diphenylmethane diisocyanate, and the viscosity of the isocyanate component is 200mPa & s at 25 ℃;
the toluene diisocyanate component is formed by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4: 1;
the white material comprises the following components in parts by weight:
95 parts of polyether glycol;
0.7 part of triethylene diamine solution, wherein the triethylene diamine solution is an alcoholic solution with the mass fraction of 33%;
0.2 part of dimethylamino ethyl ether solution, wherein the dimethylamino ethyl ether solution is prepared by compounding 70 mass percent of dimethylamino ethyl ether solution and 30 mass percent of dipropylene glycol. (ii) a
0.5 part of silicone oil;
1 part of triethanolamine;
5 parts of a flame retardant, wherein the flame retardant is prepared by compounding one or more of zinc borate, zinc oxide, ferric oxide, red phosphorus, phosphate, carbonate and organic silicon;
and 3.2 parts of water.
Example four:
the preparation method of the soft foaming sponge in this embodiment is the same as that of the first embodiment described above.
The soft foaming sponge for the seat comprises raw materials of 30 parts by weight of black materials and 70 parts by weight of white materials;
the black material comprises an isocyanate component and a toluene diisocyanate component, wherein the isocyanate component and the toluene diisocyanate component are arranged according to the weight ratio of 3: 1.5;
the isocyanate component is formed by mixing isocyanate and diphenylmethane diisocyanate, and the viscosity of the isocyanate component is 200mPa & s at 25 ℃;
the toluene diisocyanate component is formed by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4: 1;
the white material comprises the following components in parts by weight:
105 parts of polyether glycol;
1.5 parts of a triethylene diamine solution, wherein the triethylene diamine solution is an alcoholic solution with the mass fraction of 33%;
0.2 part of dimethylamino ethyl ether solution, wherein the dimethylamino ethyl ether solution is prepared by compounding 70 mass percent of dimethylamino ethyl ether solution and 30 mass percent of dipropylene glycol. (ii) a
15 parts of silicone oil;
1.2 parts of triethanolamine;
5 parts of a flame retardant, wherein the flame retardant is prepared by compounding one or more of zinc borate, zinc oxide, ferric oxide, red phosphorus, phosphate, carbonate and organic silicon;
and 3.4 parts of water.
Example five:
the preparation method of the soft foaming sponge in this embodiment is the same as that of the first embodiment described above.
A soft foaming sponge for a seat comprises raw materials of a black material and a white material, wherein the black material and the white material are arranged according to the weight ratio of 35: 65;
the black material comprises an isocyanate component and a toluene diisocyanate component, wherein the isocyanate component and the toluene diisocyanate component are arranged according to the weight ratio of 3: 2;
the isocyanate component is formed by compounding isocyanate and diphenylmethane diisocyanate, and the viscosity of the isocyanate component is 250mPa & s;
the toluene diisocyanate component is formed by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4: 1;
the white material comprises the following components in parts by weight:
95 parts of polyether glycol;
1.5 parts of a triethylene diamine solution, wherein the triethylene diamine solution is an alcoholic solution with the mass fraction of 33%;
0.3 part of dimethylamino ethyl ether solution, wherein the dimethylamino ethyl ether solution is prepared by compounding 70 mass percent of dimethylamino ethyl ether solution and 30 mass percent of dipropylene glycol. (ii) a
1.5 parts of silicone oil;
1.5 parts of triethanolamine;
7 parts of flame retardant, wherein the flame retardant comprises one or more of zinc borate, zinc oxide, ferric oxide, red phosphorus, phosphate, carbonate and organic silicon;
and 3.8 parts of water.
Example six:
the preparation method of the soft foaming sponge in this embodiment is the same as that of the first embodiment described above.
The soft foaming sponge for the seat comprises raw materials of 35 parts by weight of black materials and 65 parts by weight of white materials;
the black material comprises an isocyanate component and a toluene diisocyanate component, wherein the isocyanate component and the toluene diisocyanate component are arranged according to the weight ratio of 3: 1.5;
the isocyanate component is formed by mixing isocyanate and diphenylmethane diisocyanate, and the viscosity of the isocyanate component is 200mPa & s at 25 ℃;
the toluene diisocyanate component is formed by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4: 1;
the white material comprises the following components in parts by weight:
105 parts of polyether glycol;
0.7 part of triethylene diamine solution, wherein the triethylene diamine solution is an alcoholic solution with the mass fraction of 33%;
0.3 part of dimethylamino ethyl ether solution, wherein the dimethylamino ethyl ether solution is prepared by compounding 70 mass percent of dimethylamino ethyl ether solution and 30 mass percent of dipropylene glycol. (ii) a
0.9 part of silicone oil;
1.5 parts of triethanolamine;
7 parts of flame retardant, wherein the flame retardant comprises one or more of zinc borate, zinc oxide, ferric oxide, red phosphorus, phosphate, carbonate and organic silicon;
and 4 parts of water.
Comparative example one:
in this comparative example, the sponge starting material composition of the first example was used, and the preparation method was as follows:
step (1): mixing the isocyanate component and the toluene diisocyanate component according to a ratio, and uniformly stirring to obtain a black material;
mixing polyether dihydric alcohol, triethylene diamine solution, dimethylamino ethyl ether solution, silicone oil, triethanolamine, a flame retardant and water according to a ratio, and uniformly stirring to obtain a white material;
step (2): preheating a mould to enable the mould to be stable and constant at 55 ℃, placing the middle part of the seat backrest iron frame in the mould, extending two ends of the iron frame out of the mould, and then injecting the black material and the white material into the mould according to the proportion;
and (3): after the black material and the white material are injected into the mold, the mold cover is covered without other treatment;
and (4): controlling the pressure in the mold to be kept at 1.5Pa, foaming for 5 minutes, and then opening the mold to obtain the soft foaming sponge.
Comparative example two:
the method for preparing the soft foamed sponge in this comparative example was the same as that of the first example described above.
The comparative example adopts a sponge inner container with the publication number of CN103908103B, and the sponge inner container is formed by foaming the following components:
100 parts by weight of polyether glycol;
85 parts by weight of toluene diisocyanate;
0.1 part by weight of a tin catalyst;
0.1 part by weight of an amine catalyst;
0.8 part by weight of water;
0.5 part by weight of silicone oil surfactant.
TABLE 1 Soft foam sponge Components and content
According to the standard of QB/T2080-:
TABLE 2 qualified sponge Standard Table
| Detecting items | Apparent density | Tensile strength | Elongation at break | 75% compression set | Rebound resilience | Tear strength |
| Unit of | kg/m3 | Kpa | ％ | ％ | ％ | N/cm |
| Standard value | ≥40 | ≥80 | ≥100 | ≤10 | ≥60 | ≥1.75 |
According to the detection standards shown in table 2, the soft foamed sponges prepared in the first to sixth examples of the present invention and the sponges prepared in the comparative examples 1 and 2 were repeatedly produced 100 times, and the sponges produced each time were respectively detected, so that the yield results are shown in table 3:
TABLE 3 sponge good-quality table
| Experiment number | Yield of good products |
| Example one | 100％ |
| Example two | 98％ |
| EXAMPLE III | 99％ |
| Example four | 97％ |
| EXAMPLE five | 99％ |
| EXAMPLE six | 98％ |
| Comparative example 1 | 80％ |
| Comparative example No. two | 90％ |
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (5)
1. A preparation method of a soft foaming sponge for a seat is characterized by comprising the following steps: the method comprises the following steps:
step (1): mixing the isocyanate component and the toluene diisocyanate component according to a ratio, and uniformly stirring to obtain a black material;
mixing polyether polyol, triethylene diamine solution, bis-dimethylamino ethyl ether solution, silicone oil, triethanolamine, a flame retardant and water according to a ratio, and uniformly stirring to obtain a white material;
step (2): preheating a mould to enable the mould to be stable and constant at 50-55 ℃, placing all the seat back iron frame in the mould in advance, placing two ends of the iron frame in the mould completely, sealing the edge positions of the two ends of the iron frame placed in the mould, and then injecting black materials and white materials into the mould according to the proportion;
and (3): after the black material and the white material are injected into the mold, the mold cover is covered, sealing rubber is filled between the mold and the mold cover, the mold is locked by using a clamp, and the mold is sealed;
and (4): controlling the pressure in the mold to be kept at 1.5Pa, foaming for 3-5 minutes, and then opening the mold to obtain soft foaming sponge;
the soft foaming sponge comprises raw materials of black materials and white materials, wherein the black materials account for 30-35 parts by weight, the white materials account for 65-70 parts by weight, and the sum of the black materials and the white materials accounts for 100 parts by weight;
the black material comprises an isocyanate component and a toluene diisocyanate component, wherein the isocyanate component and the toluene diisocyanate component are arranged according to the weight ratio of 3 (1.5-2);
the white material comprises the following components in parts by weight:
95-105 parts of polyether polyol;
0.7-1.5 parts of triethylene diamine solution;
0.1-0.3 part of bis-dimethylamino ethyl ether solution;
0.5-1.5 parts of silicone oil;
1.0-1.5 parts of triethanolamine;
5-7 parts of a flame retardant;
3-4 parts of water;
the sealing rubber is thermoplastic polyurethane elastomer rubber;
the isocyanate component is formed by mixing isocyanate and diphenylmethane diisocyanate, and the viscosity of the isocyanate component at 25 ℃ is 150-250 mPa.s;
the toluene diisocyanate component is formed by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4: 1.
2. The method for preparing the soft foam sponge for the seat as claimed in claim 1, wherein the method comprises the following steps: the raw materials of the soft foaming sponge comprise 33 parts of black materials and 67 parts of white materials;
the black material is prepared from the isocyanate component and the toluene diisocyanate component according to the weight ratio of 3: 2;
the white material comprises the following components in parts by weight:
100 parts of polyether glycol;
1.2 parts of a triethylene diamine solution;
0.1 part of dimethylamino ethyl ether solution;
0.9 part of silicone oil;
1.2 parts of triethanolamine;
6 parts of a flame retardant;
and 3.6 parts of water.
3. The method for preparing a soft foam sponge for a seat as claimed in claim 1 or 2, wherein: the flame retardant is prepared by mixing one or more of zinc borate, zinc oxide, iron oxide, red phosphorus, phosphate, carbonate and organic silicon.
4. The method for preparing a soft foam sponge for a seat as claimed in claim 1 or 2, wherein: the triethylene diamine solution is an alcohol solution with the mass fraction of 33%.
5. The method for preparing a soft foam sponge for a seat as claimed in claim 1 or 2, wherein: the dimethylamino ethyl ether solution is prepared by compounding dimethylamino ethyl ether with the mass fraction of 70% and dipropylene glycol with the mass fraction of 30%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3219738A1 (en) * | 2016-03-15 | 2017-09-20 | Evonik Degussa GmbH | Production of viscoelastic polyurethane systems using block polymers having linked siloxane blocks as cell-opening agents |
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| CN2273138Y (en) * | 1996-11-05 | 1998-01-28 | 李开疆 | Polyurethane moulding form full-plastic sofa |
| DE102008030763A1 (en) * | 2008-06-28 | 2009-12-31 | Bayer Materialscience Ag | Process for reducing emissions of a polyurethane foam |
| CN102816292A (en) * | 2012-09-07 | 2012-12-12 | 随州市鸿德聚氨酯有限公司 | Polyurethane foam special for automobile seat and preparation method |
| CN204123577U (en) * | 2014-05-12 | 2015-01-28 | 郑州精益达汽车零部件有限公司 | Band skeleton sponge seat chair back mould |
| CN106700030B (en) * | 2016-12-30 | 2021-06-08 | 浙江华峰新材料有限公司 | Polyurethane resin for slow-rebound sponge, preparation method and application thereof |
| CN107857865B (en) * | 2017-11-20 | 2021-07-16 | 郑州精益达汽车零部件有限公司 | Full-water environment-friendly flame-retardant flatulence memory polyurethane foam for automobile seat and preparation method thereof |
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