CN110835419B - Flatulence cotton bale and preparation method thereof - Google Patents
Flatulence cotton bale and preparation method thereof Download PDFInfo
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- 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
- C08J9/06—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 chemical blowing agent
- C08J9/08—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 chemical blowing agent developing carbon dioxide
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- 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
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0033—Use of organic additives containing sulfur
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- 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
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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Abstract
The invention discloses an inflatable cotton bag and a preparation method thereof, and belongs to the technical field of polyurethane foam materials. The technical key points are as follows: 13-18 parts of polyether polyol; 8-10 parts of isocyanate; 0.04-0.07 part of amine catalyst; 0.2-0.3 part of silicone oil; 1-3 parts of a foaming agent; 0.05-0.07 part of stannous octoate; 0.7-0.9 part of pore forming agent; 7-9 parts of paraffin; 30-35 parts of organic solvent, wherein the organic solvent can dissolve paraffin. It has the advantages of improving the tensile strength of the material and ensuring that the cotton bale is not easy to be broken by pulling.
Description
Technical Field
The invention relates to the technical field of polyurethane foam materials, in particular to an inflatable cotton bag and a preparation method thereof.
Background
The polyurethane foam material has the characteristics of low density, chemical corrosion resistance, aging resistance, excellent thermal insulation and the like, and is widely applied to the production and manufacture of refrigerators, buildings, sofas, mattresses and the like.
The invention application with the publication number CN104558508A discloses that MDI full water foaming is 45kg/m3The molded slow-rebound expansion foam is prepared from the following raw materials: the MDI system isocyanate has the functionality of 2-3 NCO value of 26-30; a polyether polyol; a surfactant; a foaming agent; a catalyst; a cross-chain extender; the polyether polyol is prepared by mixing the following materials: the functionality of the polylA is 3, and the hydroxyl value is 32-60 mgKOH/g; the functionality of the polyolB is 2, and the hydroxyl value is 240-260 mgKOH/g; the functionality of the polyoC is 3, and the hydroxyl value is 240-260 mgKOH/g; the functionality of the polyolD is 3, and the hydroxyl value is 20-28 mgKOH/g; the weight ratio of each polyol to the total amount of polyether polyol is polylA 30-60%, polylB 10-30%, polylC 10-30% and polylD 10-20%; the dosage of the surfactant is 1 to 6 percent of the weight ratio of 100 parts of polyether polyol; the dosage of the foaming agent is 100 parts of polyether1-4% of polyhydric alcohol; the dosage of the catalyst is 0.1 to 2 percent of the weight ratio of 100 parts of polyether polyol; the using amount of the cross-chain extender is 1-4% of the weight ratio of 100 parts of polyether polyol.
According to the paragraph [ 0056 ] of the specification of the above application, it is known that the tensile strength of the final product prepared by the above method is 0.03Mpa, and it is difficult to satisfy the tensile strength requirements of sofa mattresses and the like.
Disclosure of Invention
In view of the disadvantages of the prior art, a first object of the present invention is to provide an inflatable cotton bale, which has the advantages of improving the tensile strength of the material and making the cotton bale not easy to be broken.
The second purpose of the invention is to provide a preparation method of the flatulence cotton bale, which has the advantages of improving the tensile strength of materials and enabling the cotton bale not to be broken easily.
In order to achieve the first object, the invention provides the following technical scheme:
the flatulence cotton bale comprises the following raw materials in parts by weight:
13-18 parts of polyether polyol;
8-10 parts of isocyanate;
0.04-0.07 part of amine catalyst;
0.2-0.3 part of silicone oil;
1-3 parts of a foaming agent;
0.05-0.07 part of stannous octoate;
0.7-0.9 part of pore forming agent;
7-9 parts of paraffin;
30-35 parts of organic solvent, wherein the organic solvent can dissolve paraffin.
By adopting the technical scheme, the pore-forming agents in the raw materials are reduced, the weakest part of the foam pores can be only crushed by less pore-forming agents, the influence on the tensile strength of the material is small, and the gel of the weakest foam wall can be solidified at the meridian part of the foam after being crushed, so that the meridian strength of the foam is higher, and the tensile strength of the material is improved. After the paraffin is added, the paraffin is uniformly distributed in the material blank, an organic solvent is filled in the material blank after entering the pores of the material blank, the paraffin is dissolved, a small cavity is formed after the position occupied by the paraffin originally is dissolved, the number of micropores of the material blank is increased under the condition that the formed pores in the foaming process are not torn and damaged, the cell walls of the material blank have good continuity, the resilience rate of the material is reduced, and meanwhile, the influence on the tensile strength of the material is small. The paraffin wax and other raw material components are uniformly mixed, the mixture is uniformly distributed in the blank after reaction, and the micro cavities formed after the mixture is dissolved are relatively uniform, so that the tensile strength and the air permeability of the material are improved.
More preferably, the organic solvent is any one of dichloromethane, chloroform and diethyl ether.
Through adopting above-mentioned technical scheme, dichloromethane, chloroform, ether compare have lower boiling point, are evaporated more easily, are convenient for clear away at last, reduce the heat energy that needs when drying.
Further preferably, the coating also comprises 3-5 parts by weight of sodium polyacrylate.
By adopting the technical scheme, the sodium polyacrylate has better cohesiveness, the mutual combination of material particles is promoted, the toughness of the foam cell walls can be improved due to the existence of the sodium polyacrylate, and the tensile strength of the material is improved. And meanwhile, the gel of the broken wall containing sodium polyacrylate is solidified at the meridian part of the foam, so that the strength of the meridian part is improved, and the connection strength of the broken foam wall and the self foam hole and the adjacent foam holes is improved. The sodium polyacrylate and the crushed foam wall generate a synergistic effect, so that the tensile strength of the material can be greatly improved.
Further preferably, the detergent also comprises 0.2 to 0.6 weight part of sodium dodecyl sulfate.
By adopting the technical scheme, the sodium dodecyl sulfate has good permeation effect, so that the sodium polyacrylate can be dispersed into each component, and the sodium polyacrylate is uniformly arranged among the components, so that the content of the sodium polyacrylate in each part of the finally formed material is uniform, the strength of each cell wall is stabilized, and the tensile strength of the material is improved; meanwhile, various raw materials such as a pore-forming agent, a foaming agent and the like can be fully and uniformly mixed when being mixed, and after all components are uniformly mixed, the size and distribution of bubbles can be more uniform in the foaming process, so that the tensile strength of the material is improved; and furthermore, the sodium dodecyl sulfate enables the paraffin to be distributed more uniformly in the foaming process, reduces the accumulation of the paraffin at a certain position, enables micropores generated after the paraffin is dissolved to be distributed more uniformly and finely, and improves the continuity of the foam cell wall, thereby improving the tensile strength of the material.
In order to achieve the second object, the invention provides the following technical scheme, namely a preparation method of the flatulence cotton bale, which comprises the following steps:
step one, preparing a component A, and uniformly mixing and stirring polyether polyol, an amine catalyst, silicone oil, a foaming agent, stannous octoate, a pore-forming agent and paraffin in corresponding parts by weight to obtain the component A;
respectively putting the component A and the isocyanate with the corresponding weight parts into material cylinders corresponding to a foaming machine, fully stirring the component A and the isocyanate for 10 +/-2 minutes through a mixing head of the foaming machine, and pouring the mixture into a mold for foaming and molding to obtain a material blank;
taking the blank out of the die, soaking the blank in an organic solvent for 12 +/-2 minutes, and repeatedly extruding the blank;
and step four, taking the material blank out of the organic solvent, extruding the material blank to discharge the solution, putting the material blank into a drying box for drying, and controlling the temperature of the drying box at 35-80 ℃ to obtain the flatulence cotton bale.
By adopting the technical scheme, after the foaming reaction is finished in the foaming machine, the material is soaked in the organic solvent, the organic solvent repeatedly enters and exits the material along with continuous extrusion of the material, the paraffin is dissolved by the organic solvent entering the material, and then the paraffin flows out of the material along with the organic solvent, so that the aim of dissolving the paraffin to form micropores on the material is fulfilled; and then discharging most of the organic solvent in the material by extrusion, and baking the wet material in an oven to evaporate and discharge the residual organic solvent so as to remove the organic solvent in the material.
Preferably, the second step includes the steps of uniformly mixing the component A and half of dodecylsulfonic acid to obtain a component B, mixing half of sodium dodecylsulfonate and isocyanate to obtain a component C, respectively putting the component B and the component C into material cylinders corresponding to a foaming machine, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, mixing, pouring into a mold, and foaming to obtain a blank.
Through the technical scheme, a part of sodium dodecyl sulfate is added into the component A, so that the components such as polyether polyol, a cell opener, a foaming agent, paraffin and the like can be uniformly mixed and dispersed, and the other part of the sodium dodecyl sulfate is added into isocyanate before the component A and the isocyanate are mixed, so that the surface activity of the component A and the isocyanate can be improved before the component A and the isocyanate are mixed; because the foaming reaction time is short, if all the sodium dodecyl sulfate is added into the component A, the surface activity of isocyanate needs to be improved after a period of reaction in the foaming process, and the sodium dodecyl sulfate and the component A have better surface activity when the foaming is started by separately adding the sodium dodecyl sulfate, so that the foam holes are distributed more uniformly, and the tensile strength of the material is improved.
More preferably, in the second step, the sum of the volumes of the component B and the component C filled into the mold is larger than the volume of the mold, and the sum of the volumes of the component B and the component C exceeds 9-11% of the volume of the mold.
Through adopting above-mentioned technical scheme, pack into to the mould and be greater than mould volume's B component and C component, the density of material embryo increases, and the tensile strength reinforcing of material embryo along with filling the constantly increase of mixture volume, gaseous density is too big in the reaction process, and the bubble wall of foam is difficult to bear a large amount of gas and takes place serious damage, leads to tensile strength to descend.
Preferably, in the fourth step, before the material blank is placed into the drying box, the material blank is placed into a flowing absolute ethyl alcohol solution for 5-9 minutes, and the material blank is repeatedly extruded at the same time.
Through adopting above-mentioned technical scheme, get rid of behind most dichloromethane through the extrusion, through the washing of anhydrous alcohol solution, extrude the material embryo repeatedly simultaneously, inside the continuous business turn over material embryo of anhydrous alcohol solution, with the organic solvent sanitization in the material embryo, reduce the organic solvent residual amount in the material embryo, get rid of the anhydrous alcohol in the material embryo through the stoving, remain some anhydrous alcohol in the material, and anhydrous alcohol is nontoxic, not only can cause the injury still have certain bactericidal action to the human body, can also improve the bacterinertness of material.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) a small amount of the cell opening agent reduces the breakage of cells, improves the connection strength between the cells, can improve the number of micropores in the material by dissolving the paraffin and improve the tensile strength of the material while ensuring other properties of the material,
(2) the sodium polyacrylate and the sodium dodecyl sulfate enhance the acting force among material particles, so that micropores are distributed more uniformly, and the tensile strength of the material can be improved;
(3) after the organic solvent is cleaned by absolute ethyl alcohol and dried, the harm of the material to human bodies can be reduced, and the antibacterial performance of the material can be improved.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1: the components and corresponding parts by weight of the inflatable cotton bale are shown in table 1, in the embodiment, the Korean SKC polyether polyol Y-1030 is adopted as polyether polyol, the isocyanate is 8610, dimethylcyclohexylamine is adopted as an amine catalyst, deionized water is adopted as a foaming agent, a pore-forming agent purchased from American Meiji chart company is a pore-forming agent with the model of Nia L-6164, and xylene is adopted as an organic solvent in the embodiment; and is prepared by the following steps:
step one, preparing a component A, and uniformly mixing and stirring polyether polyol, an amine catalyst, silicone oil, a foaming agent, stannous octoate, a pore-forming agent and paraffin in corresponding parts by weight to obtain the component A;
respectively putting the component A and the isocyanate with the corresponding weight parts into material cylinders corresponding to a foaming machine, fully stirring the component A and the isocyanate for 10 +/-2 minutes through a mixing head of the foaming machine, and pouring the mixture into a mold for foaming and molding to obtain a material blank;
taking the blank out of the die, soaking the blank in an organic solvent for 12 +/-2 minutes, and repeatedly extruding the blank;
and step four, taking the material blank out of the organic solvent, extruding the material blank to discharge the solution, putting the material blank into a drying box for drying, and controlling the temperature of the drying box at 80 ℃ to obtain the flatulence cotton bale.
Examples 2 to 3: an inflatable cotton bale is different from the inflatable cotton bale in example 1 in the weight parts of the components, and the components and the corresponding weight parts are shown in table 1.
TABLE 1 Components and parts by weight of examples 1-3
| Components | Example 1 | Example 2 | Example 3 |
| Polyether polyols | 13 | 15 | 18 |
| Isocyanates | 8 | 9 | 10 |
| Amine catalysts | 0.04 | 0.05 | 0.07 |
| Silicone oil | 0.2 | 0.25 | 0.3 |
| Foaming agent | 1 | 2 | 3 |
| Stannous octoate | 0.05 | 0.06 | 0.07 |
| Pore-forming agent | 0.7 | 0.8 | 0.9 |
| Paraffin wax | 9 | 8 | 7 |
| Organic solvent/xylene | 35 | 32 | 30 |
Example 4: an air-inflated cotton bale is different from the air-inflated cotton bale in the embodiment 1 in that dichloromethane is used as an organic solvent, and the temperature of a drying box in the fourth step is controlled at 39 ℃.
Example 5: an inflatable cotton bale is different from the inflatable cotton bale in the embodiment 1 in that the organic solvent is trichloromethane, and the temperature of the drying box in the fourth step is controlled at 61 ℃.
Example 6: the difference between the inflated cotton bale and the inflated cotton bale in the embodiment 1 is that the used organic solvent is diethyl ether, and the temperature of the drying box in the fourth step is controlled at 35 ℃.
Example 7: the difference between the flatulence cotton bale and the embodiment 1 is that in the step one, 3 parts by weight of sodium polyacrylate is added into the component A.
Example 8: the difference between the flatulence cotton bale and the flatulence cotton bale in the embodiment 7 is that in the step one, 4 parts by weight of sodium polyacrylate is added in the component A.
Example 9: the difference between the flatulence cotton bale and the embodiment 1 is that in the step one, 5 parts by weight of sodium polyacrylate is further added into the component A.
Example 10: an air-inflated bale of cotton is different from that in example 7 in that dichloromethane is used as an organic solvent, and the temperature of a drying oven in the fourth step is controlled at 39 ℃.
Example 11: an inflation cotton bale is different from that in the embodiment 7 in that the second step comprises the following steps of uniformly mixing the component A and 0.1 part by weight of dodecyl sulfonic acid to obtain a component B, mixing 0.1 part by weight of sodium dodecyl sulfate and isocyanate to obtain a component C, respectively putting the component B and the component C into material cylinders corresponding to a foaming machine, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, mixing, pouring into a mold, foaming and molding to obtain a blank.
Example 12: an inflation cotton bale is different from that in the embodiment 7 in that the second step comprises the following steps of uniformly mixing the component A and 0.2 part by weight of dodecyl sulfonic acid to obtain a component B, mixing 0.2 part by weight of sodium dodecyl sulfate and isocyanate to obtain a component C, respectively putting the component B and the component C into material cylinders corresponding to a foaming machine, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, mixing, pouring into a mold, foaming and molding to obtain a blank.
Example 13: an inflation cotton bale is different from that in the embodiment 7 in that the second step comprises the following steps of uniformly mixing the component A and 0.3 part by weight of dodecyl sulfonic acid to obtain a component B, mixing 0.3 part by weight of sodium dodecyl sulfate and isocyanate to obtain a component C, respectively putting the component B and the component C into material cylinders corresponding to a foaming machine, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, mixing, pouring into a mold, foaming and molding to obtain a blank.
Example 14: an air-inflated bale of cotton was produced as described in example 11, except that methylene chloride was used as the organic solvent, and the temperature of the oven was controlled at 39 ℃.
Example 15: an inflatable bale of cotton differing from that of example 11 in that in step two, the mould is filled with a sum of the volumes of component B and component C greater than the volume of the mould, the sum of the volumes of component B and component C exceeding 9% of the volume of the mould.
Example 16: an inflatable bale of cotton differing from that of example 11 in that in step two, the mould is filled with a volume of the sum of the volumes of the B and C components greater than the volume of the mould, the volume of the sum of the volumes of the B and C components exceeding 10% of the volume of the mould.
Example 17: an inflatable bale of cotton differing from that of example 11 in that in step two, the mould is filled with a volume sum of the B and C components greater than the volume of the mould, the volume sum of the B and C components exceeding 11% of the volume of the mould.
Example 18: the difference between the inflated cotton bale and the embodiment 1 is that in the fourth step, the blank is put into a flowing absolute ethyl alcohol solution for 5 minutes before being put into a drying box, and the blank is repeatedly extruded at the same time.
Example 19: the difference between the inflated cotton bale and the embodiment 1 is that in the fourth step, the blank is put into a flowing absolute ethyl alcohol solution for 7 minutes before being put into a drying box, and the blank is repeatedly extruded at the same time.
Example 20: the difference between the inflated cotton bale and the embodiment 1 is that in the fourth step, the blank is put into a flowing absolute ethyl alcohol solution for 9 minutes before being put into a drying box, and the blank is repeatedly extruded at the same time.
Comparative example 1: an air-bulking cotton bale, differing from example 1 in that the component A was prepared without the addition of a cell opener.
Comparative example 2: an air inflation cotton bale is different from the embodiment 1 in that 0.6 part by weight of a pore opening agent is added when the component A is prepared.
Comparative example 3: an air inflation cotton bale is different from the embodiment 1 in that 1.5 parts by weight of a pore opening agent is added when the component A is prepared.
Comparative example 4: an air-bulking cotton bale, differing from example 1 in that no paraffin was added to the preparation of component A.
Comparative example 5: an air inflation cotton bale is different from the air inflation cotton bale in example 1 in that 6 parts by weight of paraffin wax is added when the component A is prepared.
Comparative example 6: an air inflation cotton bale is different from the air inflation cotton bale in example 1 in that 12 parts by weight of paraffin wax is added in the preparation of the component A.
Comparative example 7: an air-inflated bale of cotton is different from that in example 1 in that 25 parts by weight of organic solvent is used.
Comparative example 8: an air inflation cotton bale is different from the air inflation cotton bale in the embodiment 1 in that the weight part of the organic solvent is 45 parts.
Comparative example 9: the difference between the flatulence cotton bale and the embodiment 1 is that in the step one, 2 parts by weight of sodium polyacrylate is added into the component A.
Comparative example 10: the difference between the flatulence cotton bale and the embodiment 1 is that in the step one, 9 parts by weight of sodium polyacrylate is added into the component A.
Comparative example 11: an inflation cotton bale is different from that in the embodiment 7 in that the second step comprises the following steps of uniformly mixing the component A and 0.05 part by weight of dodecyl sulfonic acid to obtain a component B, mixing 0.05 part by weight of sodium dodecyl sulfate and isocyanate to obtain a component C, respectively putting the component B and the component C into material cylinders corresponding to a foaming machine, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, mixing, pouring into a mold, foaming and molding to obtain a blank.
Comparative example 12: an inflation cotton bale is different from that in the embodiment 7 in that the second step comprises the following steps of uniformly mixing the component A and 0.8 part by weight of dodecyl sulfonic acid to obtain a component B, mixing 0.8 part by weight of sodium dodecyl sulfate and isocyanate to obtain a component C, respectively putting the component B and the component C into material cylinders corresponding to a foaming machine, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, mixing, pouring into a mold, foaming and molding to obtain a blank.
Comparative example 13: an inflation cotton bale is different from the embodiment 7 in that the step two comprises the following steps of uniformly mixing the component A and 0.2 part by weight of dodecyl sulfonic acid to obtain a component B, mixing 0 part by weight of sodium dodecyl sulfate and isocyanate to obtain a component C, respectively putting the component B and the component C into material cylinders corresponding to a foaming machine, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, mixing, pouring into a mold, and foaming to obtain a blank.
Comparative example 14: an inflatable bale of cotton differing from that of example 11 in that in step two, the mould is filled with a sum of the volumes of component B and component C greater than the volume of the mould, the sum of the volumes of component B and component C exceeding 8% of the volume of the mould.
Comparative example 15: an inflatable bale of cotton differing from that of example 11 in that in step two, the mould is filled with a sum of the volumes of component B and component C greater than the volume of the mould, the sum of the volumes of component B and component C exceeding 12% of the volume of the mould.
Comparative example 16: the difference from the embodiment 1 is that the second step comprises the following steps of uniformly mixing the component A and 0.1 part by weight of dodecyl sulfonic acid to obtain a component B, mixing 0.1 part by weight of sodium dodecyl sulfonate and isocyanate to obtain a component C, respectively putting the component B and the component C into material cylinders corresponding to a foaming machine, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, pouring the mixture into a mold for foaming and molding to obtain a blank.
Comparative example 17: the difference between the inflated cotton bale and the embodiment 1 is that in the fourth step, the blank is put into a flowing absolute ethyl alcohol solution for 4 minutes before being put into a drying box, and the blank is repeatedly extruded at the same time.
Comparative example 18: the difference between the inflated cotton bale and the embodiment 1 is that in the fourth step, the blank is put into a flowing absolute ethyl alcohol solution for 10 minutes before being put into a drying box, and the blank is repeatedly extruded at the same time.
Test samples: the inflated bales obtained in examples 1-17 were used as test samples 1-17 and the inflated bales obtained in comparative examples 1-16 were used as control samples 1-16.
Test one, measurement of 75% compression set
A test method; the products prepared in examples 1 to 17 were tested in 5 samples each and averaged. The test temperature is 70 +/-2 ℃ and the test time is 22 hours, the thickness of the test sample is compressed by 75 percent, and the size of the test sample is (50 +/-1) mm (25 +/-1) mm.
And (3) test results: test samples 1-17 the test results are shown in table 2.
Test II, tear Strength
A test method; the products prepared in examples 1 to 17 were tested in 5 samples each and averaged. The method is carried out according to the GB/T10808-2006 specification. Test speed 50mm/min, sample size (25 ± 0.5) mm (150 ± 1), and one end of the sample was cut with a 50mm long cut.
And (3) test results: test samples 1-17 the test results are shown in table 2.
Test III, tensile Strength test
The test method comprises the following steps: the products prepared in examples 1 to 17 and comparative examples 1 to 16 were tested by taking 5 samples of each product, and the average value was determined. Sampling is carried out according to the GB/T6344-2008 regulation, the thickness of a sample is 10mm, the width of the sample is 13mm, and the effective gauge length is 50 mm. The load indication value of the tensile testing machine is set to a zero position, the test sample is clamped on a clamp of the tensile testing machine, the test sample is carefully and symmetrically adjusted to ensure that the tensile force is uniformly distributed on the cross section of the test sample, 0.1Kpa of prestress is firstly applied to the test sample, after the preload is completed, the extension indication value of an extension system is reset, the tensile testing machine is started, the tensile speed is 450 and 550mm/min, and the maximum load in the tensile process is recorded.
A tensile testing machine: brand dennao, model WDW.
Calculating the formula: TS = F/A. Wherein TS is tensile strength in megapascals (MPa). F is the maximum load in cattle (N). A is the average original cross-sectional area of the sample in square millimeters (mm)2）。
And (3) test results: test samples 1-17 the test results are shown in table 2. The results of the tests of control samples 1-16 are shown in Table 3.
Test four, determination of rebound Rate
Sample method: the products prepared in examples 1 to 17 and comparative examples 1 to 16 were tested by taking 5 samples of each product, and the average value was determined. The test is carried out according to the method specified in GB/T6670-2008, the test environment is 23 +/-2 ℃ and (50 +/-5)% relative humidity by adopting the method A, and the method of manual reading is adopted.
And (3) test results: test samples 1-17 the test results are shown in table 2. The results of the tests of control samples 1-16 are shown in Table 3.
As shown in tables 2 and 3, when the test sample 1, the test sample 2 and the test sample 3 are respectively compared with the control sample 1, the control sample 2, the control sample 3, the control sample 4, the control sample 5 and the control sample 6, and the parts by weight of the pore former is less than 0.7 part or the parts by weight of the paraffin is less than 7 parts, the rebound rate of the material is too high, which does not meet the requirement of the rebound rate of the sofa mattress and the like; when the weight portion of the pore-forming agent is 1.5 parts or the weight portion of the paraffin is 12 parts, the tensile strength of the material is obviously reduced; therefore, when 0.7-0.9 part by weight of the cell opener and 7-9 parts by weight of the paraffin are added simultaneously, the material has more cells and micropores in the material, the cell wall of each cell has better strength, the cells also have better connection strength, and the material has qualified rebound rate and higher tensile strength.
As shown in tables 2 and 3, when the test samples 1, 2 and 3 are compared with the control samples 7 and 8, it is known that when the material is soaked in 25 parts by weight of organic solvent, the organic solvent does not completely dissolve paraffin, so that the number of micropores in the material is reduced, the rebound rate of the material is increased, and the material does not meet the requirement of rebound rate of sofa mattresses and the like, and when the material is soaked in 45 parts by weight of organic solvent, the tensile strength of the material is hardly changed, but the organic solvent is wasted, so that when the material is soaked in 30-35 parts by weight of organic solvent, the prepared material has better performance and saves cost under the condition that other performances of the material are qualified.
As shown in tables 2 and 3, when the test samples 1, 7, 8 and 9 are compared with the control samples 9 and 10, respectively, the tensile strength of the material gradually increases with the increase of sodium polyacrylate, and the tensile strength of the material is significantly reduced when the added sodium polyacrylate is 2 parts by weight as compared with the test sample 7; when the weight portion of the added polypropylene is far more than 5 portions, the tensile strength of the material is not obviously increased, so that the material prepared by adding 3-5 portions of sodium polyacrylate has better tensile strength under the condition that other properties of the material are qualified, and the cost is saved.
As shown in tables 2 and 3, when the test sample 1, the test sample 7, the test sample 11, the test sample 12 and the test sample 13 are compared with the control sample 11, the control sample 12 and the control sample 16 respectively, and when the sodium polyacrylate and the dodecylsulfonic acid are added simultaneously, the tensile strength of the material is greatly improved compared with that of the test sample 1, and the sum of the increase of the sodium polyacrylate and the increase of the dodecylsulfonic acid is larger than that of the test sample 1, which indicates that the sodium polyacrylate and the dodecylsulfonic acid play a synergistic role in improving the tensile strength of the material; when the weight portion of the added dodecyl sulfonic acid is 0.1 portion, the tensile strength of the material is greatly reduced compared with that of 0.2 portion, and when the weight portion of the added dodecyl sulfonic acid is 1.6 portions, the tensile strength of the material is hardly increased compared with that of 0.6 portion, so that when the sodium polyacrylate is added, the dodecyl sulfonic acid with the weight portion of 0.2-0.6 portion can greatly improve the tensile strength of the material under the condition that other properties of the material are qualified.
As shown in tables 2 and 3, when comparing the test samples 1, 4, 5, 6, 10 and 14, it can be seen that the paraffin can be dissolved to form a plurality of micropores by using the same parts by weight of xylene, dichloromethane, chloroform and ether under the same conditions, so as to improve the tensile strength of the material, and the prepared material has similar properties.
As shown in tables 2 and 3, when comparing the test sample 11 with the control sample 13, it is understood that the mixing of the A component and the isocyanate, and the mixing of one-half of the sodium dodecylsulfonate into the A component and the isocyanate, respectively, has higher tensile strength than the mixing of the entire sodium dodecylsulfonate with the A component, and other properties are acceptable.
As shown in tables 2 and 3, when the test sample 11, the test sample 15, the test sample 16, and the test sample 17 are compared with the control sample 14 and the control sample 15, respectively, and the mixture of the component B and the component C, which exceeds 9-11% of the weight of the mold, is poured into the mold, the tensile strength of the material increases with the increase in the density of the material filled into the mold within this range, and decreases to 8%, the tensile strength of the material decreases more than 9%, and when the tensile strength exceeds 11%, the tensile strength of the material decreases due to excessive breakage of the cells caused by excessive gas density breaking.
TABLE 2 test data for test samples 1-17
| Sample (I) | Test sample 1 | Test sample 2 | Test sample 3 | Test sample 4 | Test sample 5 | Test sample 6 | Test sample 7 | Test sample 8 | Test sample 9 |
| Determination of 75% compression set% | 5.23 | 5.12 | 5.06 | 5.32 | 5.14 | 5.17 | 5.28 | 5.19 | 5.26 |
| Tear Strength/(N/cm) | 1.53 | 1.52 | 1.5 | 1.51 | 1.52 | 1.52 | 1.57 | 1.59 | 1.61 |
| Tensile strength/MPa | 0.8 | 0.81 | 0.79 | 0.82 | 0.8 | 0.81 | 1.02 | 1.09 | 1.15 |
| Rebound Rate/%) | 8.1 | 8.2 | 7.8 | 8.1 | 7.9 | 7.8 | 8.7 | 8.8 | 8.9 |
| Sample (I) | Test sample 10 | Test sample 11 | Test sample 12 | Test sample 13 | Test sample 14 | Test sample 15 | Test sample 16 | Test sample 17 | |
| Determination of 75% compression set% | 5.24 | 5.26 | 5.24 | 5.19 | 5.21 | 5.23 | 5.25 | 5.19 | |
| Tear Strength/(N/cm) | 1.59 | 1.69 | 1.68 | 1.71 | 1.65 | 1.72 | 1.73 | 1.71 | |
| Tensile strength/MPa | 1.01 | 1.31 | 1.35 | 1.39 | 1.31 | 1.38 | 1.42 | 1.39 | |
| Rebound Rate/%) | 8.7 | 9.5 | 9.4 | 9.5 | 9.1 | 9.2 | 9.6 | 9.3 |
TABLE 3 test data for control samples 1-16
| Sample (I) | Control sample Article 1 | Control sample Article 2 | Control sample Article 3 | Control sample Article 4 | Control sample Article 5 | Control sample Article 6 | Control sample Article 7 | Control sample Article 8 | Control sample Article 9 | Control sample Article 10 | Control sample Article 11 | Control sample Article 12 | Control sample Article 13 | Control sample Article 14 | Control sample Article 15 | Control sample Article 16 |
| Tensile strength- Mpa | 1.1 | 0.9 | 0.4 | 0.92 | 0.89 | 0.5 | 0.9 | 0.81 | 0.83 | 1.16 | 1.16 | 1.41 | 1.19 | 1.32 | 1.34 | 0.85 |
| Rebound Rate/%) | 15.2 | 13.4 | 9.8 | 14.4 | 13.1 | 8.1 | 13.3 | 8.2 | 8.2 | 8.9 | 9 | 9.2 | 8.9 | 9.1 | 9.2 | 8.2 |
Experiment five, organic solvent residual quantity
The test instrument: korean Yanglin YL gas chromatograph
The test method comprises the following steps: the products prepared in examples 1, 18 to 20 and the products prepared in comparative examples 17 to 18 were cut and sampled for each sample size of (50 ± 1) mm (25 ± 1) mm. The sample was placed in an Erlenmeyer flask and heated in a dry incubator at 80 ℃ for 30 minutes, then 1.0-1.5 ml was withdrawn and injected into the gas phase.
And (3) test results: the test results of test sample 1, test samples 18 to 20, and control samples 17 to 18 are shown in Table 4.
TABLE 4 xylene residual test data for samples
| Sample (I) | Test sample 1 | Test sample 18 | Test sample 19 | Test sample 20 | Control sample 17 | Control sample 18 |
| Residual xylene quantity/(mg/m)3） | 5.12 | 3.01 | 2.91 | 2.78 | 4.12 | 2.77 |
As is clear from Table 4, after the washing with the absolute ethanol solution, the residual amount of xylene in the material gradually decreased with the increase in the washing time, and the residual amount of xylene hardly changed after the washing time exceeded 9 minutes. The residual amount of xylene is obviously increased when the cleaning time is changed from 5 minutes to 4 minutes, and the residual amount of organic solvent in the material can be effectively reduced by cleaning for 5 to 9 minutes by using the absolute ethyl alcohol solution.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. The flatulence cotton bale is characterized by comprising the following raw materials in parts by weight:
13-18 parts of polyether polyol;
8-10 parts of isocyanate;
0.04-0.07 part of amine catalyst;
0.2-0.3 part of silicone oil;
1-3 parts of a foaming agent;
0.05-0.07 part of stannous octoate;
0.7-0.9 part of pore forming agent;
7-9 parts of paraffin;
30-35 parts of an organic solvent, wherein the organic solvent is any one of dichloromethane, trichloromethane and diethyl ether, and paraffin can be dissolved in the organic solvent;
the preparation method of the flatulence cotton bale comprises the following steps:
step one, preparing a component A, and uniformly mixing and stirring polyether polyol, an amine catalyst, silicone oil, a foaming agent, stannous octoate, a pore-forming agent and paraffin in corresponding parts by weight to obtain the component A;
respectively putting the component A and the isocyanate with the corresponding weight parts into material cylinders corresponding to a foaming machine, fully stirring the component A and the isocyanate for 10 +/-2 minutes through a mixing head of the foaming machine, and pouring the mixture into a mold for foaming and molding to obtain a material blank;
taking the blank out of the die, soaking the blank in an organic solvent for 12 +/-2 minutes, and repeatedly extruding the blank;
and step four, taking the material blank out of the organic solvent, extruding the material blank to discharge the solution, putting the material blank into a drying box for drying, and controlling the temperature of the drying box at 35-80 ℃ to obtain the flatulence cotton bale.
2. The flatulence cotton bale of claim 1, wherein the organic solvent is any one of dichloromethane, chloroform, and diethyl ether.
3. The flatulence cotton bale of claim 1 or 2, further comprising 3-5 parts by weight of sodium polyacrylate.
4. The flatulence cotton bale of claim 3, further comprising 0.2-0.6 parts by weight of sodium dodecyl sulfate.
5. The inflation bale of claim 1, wherein the second step comprises the steps of mixing the component A and half of dodecylsulfonic acid uniformly to obtain a component B, mixing half of sodium dodecylsulfonate with isocyanate to obtain a component C, putting the component B and the component C into material cylinders corresponding to a foaming machine respectively, fully stirring the component B and the component C for 10 +/-2 minutes through a mixing head of the foaming machine, pouring the mixture into a mold for foaming and molding to obtain a blank.
6. The inflation bale of claim 5, wherein in step two, the sum of the volumes of the B component and the C component is greater than the volume of the mold, and the sum of the volumes of the B component and the C component exceeds 9-11% of the volume of the mold.
7. The air-bulking cotton bale according to claim 6, wherein in the fourth step, before the material embryo is put into the drying oven, the material embryo is put into the flowing absolute ethyl alcohol solution for 5-9 minutes, and the material embryo is repeatedly extruded.
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