CN113861501A - Silica gel cotton pillow and preparation method thereof - Google Patents
Silica gel cotton pillow and preparation method thereof Download PDFInfo
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- CN113861501A CN113861501A CN202111162637.7A CN202111162637A CN113861501A CN 113861501 A CN113861501 A CN 113861501A CN 202111162637 A CN202111162637 A CN 202111162637A CN 113861501 A CN113861501 A CN 113861501A
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- silica gel
- polyurethane
- cotton pillow
- mixture
- sponge block
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000000741 silica gel Substances 0.000 title claims abstract description 30
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 229920002635 polyurethane Polymers 0.000 claims abstract description 50
- 239000004814 polyurethane Substances 0.000 claims abstract description 50
- 239000000203 mixture Substances 0.000 claims abstract description 47
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 26
- 229920000570 polyether Polymers 0.000 claims abstract description 26
- 239000012948 isocyanate Substances 0.000 claims abstract description 15
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000002791 soaking Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 10
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 6
- -1 polyoxyethylene Polymers 0.000 claims description 6
- 229920001451 polypropylene glycol Polymers 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 5
- 150000001450 anions Chemical class 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 5
- 229920005830 Polyurethane Foam Polymers 0.000 description 4
- 150000002009 diols Chemical class 0.000 description 4
- 239000011496 polyurethane foam Substances 0.000 description 4
- 125000001453 quaternary ammonium group Chemical group 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 239000002699 waste material Substances 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
- C08J9/36—After-treatment
- C08J9/40—Impregnation
- C08J9/42—Impregnation with macromolecular compounds
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
- A47G9/10—Pillows
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4808—Mixtures of two or more polyetherdiols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4833—Polyethers containing oxyethylene units
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
- A47G9/10—Pillows
- A47G2009/1018—Foam pillows
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
-
- 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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
-
- 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
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pulmonology (AREA)
- Otolaryngology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Bedding Items (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention belongs to the technical field of articles for daily use, and particularly relates to a silica gel cotton pillow and a preparation method thereof. The preparation method of the silica gel cotton pillow comprises the following steps: s1) taking the polyether mixture and isocyanate to react to obtain a primary polyurethane mixture; s2) placing the preliminary polyurethane mixture obtained in the step S1 into a closed space, intermittently introducing cold air, and continuously reacting to obtain a formed polyurethane sponge block; s3) cutting the polyurethane sponge block formed in the step S2 to obtain a cotton pillow with a required shape, soaking the cotton pillow in silica gel, extruding by a roller, and drying to obtain the polyurethane sponge block. The silica gel cotton pillow is soft, has long service life, meets the use requirements of consumers, and has strong practicability.
Description
Technical Field
The invention belongs to the technical field of articles for daily use, and particularly relates to a silica gel cotton pillow and a preparation method thereof.
Background
With the progress of technological productivity and the continuous improvement of production processes in various industries, various pillows such as glue-gathering pillows, memory cotton pillows, gel pillows, TPE pillows and the like appear in the society, and the production process is different in thousands of autumn. The latex of the glue-gathering pillow comes from rubber trees, the source is pretty, and the glue-gathering pillow has certain influence on the ecology, most of the memory cotton pillow can not be washed by water, the comfort level of the TPR pillow is not good enough, and the like.
At present, the prior art CN 105111725a discloses an antibacterial soft polyurethane foam and a preparation method thereof, which comprises the steps of firstly, carrying out surface treatment on natural anion powder by adopting a vinyl surface modifier to obtain natural anion powder with vinyl contained on the surface; then initiating the tertiary amine monomer-amide monomer mixture to copolymerize on the surface of the anion powder containing vinyl on the surface to obtain tertiary aminated anion powder; then reacting the tertiary aminated anion powder with a quaternary ammonium salinization reagent, and treating to obtain quaternary ammonium salinization anion powder; and finally, adding the quaternary ammonium salinized negative ion powder into a reaction kettle containing butter PPG, adding the auxiliary materials and MDI, stirring at a high speed, pouring into a reaction tank, and naturally standing and aging to obtain the antibacterial negative ion soft polyurethane foam. However, the flexible polyurethane foam product obtained by the method has dual functions of broad-spectrum antibiosis and anion health care, but the performance of each function is not particularly outstanding. Therefore, there is a need to provide an existing polyurethane foam product that is further improved to meet the needs of people for increasingly beautiful lives.
Disclosure of Invention
The invention aims to provide a silica gel cotton pillow and a preparation method thereof, the silica gel cotton pillow is soft, has higher tensile strength, small abrasion and 50% permanent deformation, and greatly prolongs the service life of the silica gel cotton pillow.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a silica gel cotton pillow comprises the following steps:
s1) taking the polyether mixture and isocyanate to react to obtain a primary polyurethane mixture;
s2) placing the preliminary polyurethane mixture obtained in the step S1 into a closed space, intermittently introducing cold air, and continuously reacting to obtain a formed polyurethane sponge block;
s3) cutting the polyurethane sponge block formed in the step S2 to obtain a cotton pillow with a required shape, soaking the cotton pillow in silica gel, extruding by a roller, and drying to obtain the polyurethane sponge block.
The invention adopts the method of firstly preparing the formed polyurethane sponge block and then soaking the polyurethane sponge block in the silica gel, so that the softness and toughness of the silica gel cotton pillow can be fully improved.
In addition, the step S2 controls the bubbles generated between the preliminary polyurethane mixture and the formed polyurethane sponge block, which is beneficial to improving the tensile strength, 50% permanent deformation and abrasion, thereby prolonging the service life of the silicon rubber cotton pillow.
Preferably, the mass ratio of the polyether mixture to the isocyanate is 1.1-1.3: 1, in particular, may be 1.1: 1. 1.15: 1. 1.2: 1. 1.25: 1.
preferably, the polyether mixture is at least two of polyoxypropylene glycol, polyoxyethylene glycol or polytetramethylene ether glycol, and specifically, the polyether mixture can be a combination of polyoxypropylene glycol and polyoxyethylene glycol, a combination of polyoxyethylene glycol and polytetramethylene ether glycol, and preferably a combination of polyoxyethylene glycol and polytetramethylene ether glycol.
Preferably, the specific steps of step S1 are: and (2) mixing the polyether mixture, a catalyst and water, adding isocyanate, and stopping stirring when the reaction starts to release heat and the viscosity is rapidly increased to obtain a preliminary polyurethane mixture.
Preferably, the mass ratio of the polyether mixture to the catalyst to the water is 1: 0.2-0.5: 2-5, specifically, may be 1: 0.2: 2. 1: 0.3: 2. 1: 0.4: 2. 1: 0.5: 2. 1: 0.2: 3. 1: 0.2: 4. 1: 0.2: 5.
preferably, the catalyst is at least two of triethanolamine, triethylenediamine, dibutyltin dilaurate, and specifically, a combination of triethanolamine and triethylenediamine, a combination of triethanolamine and dibutyltin dilaurate, a combination of triethylenediamine and dibutyltin dilaurate, and preferably a combination of triethanolamine and dibutyltin dilaurate.
Preferably, the temperature of the cold air is 5 to 10 ℃, specifically, 5 ℃, 5.5 ℃, 6 ℃, 6.5 ℃, 7 ℃, 8 ℃, 9 ℃ and 10 ℃. The intermittent time is 10-25s after every 5min, specifically 10s, 12s, 14s, 15s, 18s, 20s, 23s, and 25 s.
The invention also aims to provide a preparation method of the silica gel cotton pillow, which comprises the following steps:
s1) mixing the polyether mixture, a catalyst and water, adding isocyanate, and stopping stirring when the reaction starts to release heat and the viscosity rapidly increases to obtain a preliminary polyurethane mixture;
s2) placing the preliminary polyurethane mixture obtained in the step S1 into a closed space, intermittently introducing cold air, and continuously reacting to obtain a formed polyurethane sponge block; the temperature of the cold air is 5-10 ℃, and the intermittence is 10-25s after every 5 min;
s3) cutting the polyurethane sponge block formed in the step S2 to obtain a cotton pillow with a required shape, soaking the cotton pillow in silica gel, and drying to obtain the polyurethane sponge block.
The last purpose of the invention is to provide the silica gel cotton pillow prepared by any one of the preparation methods.
Compared with the prior art, the invention has the following beneficial effects:
the produced formed polyurethane sponge block is soaked in the silica gel, so that the softness and the toughness of the formed polyurethane sponge block are improved, the finished product of the silica gel cotton pillow can be washed by a machine or by a hand, the service life of the finished product of the silica gel cotton pillow is longer, the use ratio of the product is improved, and the waste is reduced.
Detailed Description
The present invention will be described in further detail with reference to the following examples. It should not be understood that the scope of the above-described subject matter of the present invention is limited to the following examples.
Example 1
A preparation method of a silica gel cotton pillow comprises the following steps:
s1) mixing the polyether mixture, a catalyst and water, adding isocyanate, and stopping stirring when the reaction starts to release heat and the viscosity rapidly increases to obtain a preliminary polyurethane mixture; the mass ratio of the polyether mixture to the catalyst to the water is 1: 0.2: 2, the catalyst is triethanolamine and triethylene diamine.
S2) placing the preliminary polyurethane mixture obtained in the step S1 into a closed space, intermittently introducing cold air, and continuously reacting to obtain a formed polyurethane sponge block; the temperature of the cold air is 6 ℃, and the interval is 10s after every 5 min;
s3) cutting the polyurethane sponge block formed in the step S2 to obtain a cotton pillow with a required shape, soaking the cotton pillow in silica gel, extruding by a roller, and drying to obtain the polyurethane sponge block.
Wherein the mass ratio of the polyether mixture to the isocyanate is 1.1: 1, the polyether mixture is the combination of polypropylene oxide diol and polyethylene oxide diol.
Example 2
A preparation method of a silica gel cotton pillow comprises the following steps:
s1) mixing the polyether mixture, a catalyst and water, adding isocyanate, and stopping stirring when the reaction starts to release heat and the viscosity rapidly increases to obtain a preliminary polyurethane mixture; the mass ratio of the polyether mixture to the catalyst to the water is 1: 0.3: 3, the catalyst is a combination of triethanolamine and dibutyltin dilaurate.
S2) placing the preliminary polyurethane mixture obtained in the step S1 into a closed space, intermittently introducing cold air, and continuously reacting to obtain a formed polyurethane sponge block; the temperature of the cold air is 7 ℃, and 15s is introduced after the intermittence is every 5 min;
s3) cutting the polyurethane sponge block formed in the step S2 to obtain a cotton pillow with a required shape, soaking the cotton pillow in silica gel, extruding by a roller, and drying to obtain the polyurethane sponge block.
Wherein the mass ratio of the polyether mixture to the isocyanate is 1.2: 1, the polyether mixture is the combination of polyoxyethylene glycol and polytetramethylene ether glycol.
Example 3
A preparation method of a silica gel cotton pillow comprises the following steps:
s1) mixing the polyether mixture, a catalyst and water, adding isocyanate, and stopping stirring when the reaction starts to release heat and the viscosity rapidly increases to obtain a preliminary polyurethane mixture; the mass ratio of the polyether mixture to the catalyst to the water is 1: 0.5: 2, the catalyst is a combination of triethanolamine and dibutyltin dilaurate.
S2) placing the preliminary polyurethane mixture obtained in the step S1 into a closed space, intermittently introducing cold air, and continuously reacting to obtain a formed polyurethane sponge block; the temperature of the cold air is 10 ℃, and 20s of cold air is introduced after the intermission of every 5 min;
s3) cutting the polyurethane sponge block formed in the step S2 to obtain a cotton pillow with a required shape, soaking the cotton pillow in silica gel, extruding by a roller, and drying to obtain the polyurethane sponge block.
Wherein the mass ratio of the polyether mixture to the isocyanate is 1.2: 1, the polyether mixture is the combination of polypropylene oxide diol and polyethylene oxide diol.
Example 4
Similar to example 2 except that the temperature of the cool air in step S2 was 2 ℃, the other examples were the same as example 2.
Example 5
Similar to example 2 except that the temperature of the cool air in step S2 was 15 ℃, the same as example 2.
Example 6
Similar to example 2, except that the batch at step S2 was 35S fed after every 5min, the same as example 2.
Comparative example 1
Similarly to embodiment 2, the difference is that step S2 is replaced with: and (4) continuously reacting the preliminary polyurethane mixture obtained in the step (S1) at normal temperature to obtain a formed polyurethane sponge block.
Experiment I, Performance test
The experimental method comprises the following steps:
the hole state: after cutting, the specimen was visually observed
Tensile strength: tested according to GB/T528-2009 standard.
Abrasion: and carrying out abrasion performance test according to GB/T1689-.
TABLE 1
As can be seen from Table 1, examples 1-3 had better cell state, higher tensile strength, less abrasion, and less 50% permanent set. In addition, the comfort of the silicon wadding pillows of examples 1-3 was tested and found to be overall softer.
Compared with the embodiment 2, the embodiments 4 to 6 change the temperature and time for introducing the cold air in the step S2, and have certain influence on various performances of the silicon cotton pillow.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A preparation method of a silica gel cotton pillow is characterized by comprising the following steps:
s1) taking the polyether mixture and isocyanate to react to obtain a primary polyurethane mixture;
s2) placing the preliminary polyurethane mixture obtained in the step S1 into a closed space, intermittently introducing cold air, and continuously reacting to obtain a formed polyurethane sponge block;
s3) cutting the polyurethane sponge block formed in the step S2 to obtain a cotton pillow with a required shape, soaking the cotton pillow in silica gel, extruding by a roller, and drying to obtain the polyurethane sponge block.
2. The preparation method of claim 1, wherein the mass ratio of the polyether mixture to the isocyanate is 1.1-1.3: 1.
3. the preparation method according to claim 1 or 2, characterized in that the polyether mixture is at least two of polyoxypropylene glycol, polyoxyethylene glycol or polytetramethylene ether glycol.
4. The preparation method according to claim 1, wherein the step S1 includes the following steps: and (2) mixing the polyether mixture, a catalyst and water, adding isocyanate, and stopping stirring when the reaction starts to release heat and the viscosity is rapidly increased to obtain a preliminary polyurethane mixture.
5. The preparation method of claim 4, wherein the mass ratio of the polyether mixture to the catalyst to the water is 1: 0.2-0.5: 2-5.
6. The method according to claim 4, wherein the catalyst is at least two of triethanolamine, triethylenediamine, and dibutyltin dilaurate.
7. The method according to claim 1, wherein the temperature of the cold air is 5 to 10 ℃, and the intermittent operation is performed by introducing 10 to 25s after every 5 min.
8. The method of claim 1, comprising the steps of:
s1) mixing the polyether mixture, a catalyst and water, adding isocyanate, and stopping stirring when the reaction starts to release heat and the viscosity rapidly increases to obtain a preliminary polyurethane mixture;
s2) placing the preliminary polyurethane mixture obtained in the step S1 into a closed space, intermittently introducing cold air, and continuously reacting to obtain a formed polyurethane sponge block; the temperature of the cold air is 5-10 ℃, and the intermittence is 10-25s after every 5 min;
s3) cutting the polyurethane sponge block formed in the step S2 to obtain a cotton pillow with a required shape, soaking the cotton pillow in silica gel, and drying to obtain the polyurethane sponge block.
9. The silica gel cotton pillow prepared by the preparation method according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111162637.7A CN113861501A (en) | 2021-09-30 | 2021-09-30 | Silica gel cotton pillow and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111162637.7A CN113861501A (en) | 2021-09-30 | 2021-09-30 | Silica gel cotton pillow and preparation method thereof |
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| Publication Number | Publication Date |
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| CN113861501A true CN113861501A (en) | 2021-12-31 |
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| CN202111162637.7A Pending CN113861501A (en) | 2021-09-30 | 2021-09-30 | Silica gel cotton pillow and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114539609A (en) * | 2022-03-09 | 2022-05-27 | 东莞市汇朋高分子科技有限公司 | Silica gel sponge material and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1031799A (en) * | 1963-02-18 | 1966-06-02 | Walker Mfg Co | Foamed plastic sorbent material and method for producing same |
| CN1740217A (en) * | 2004-08-27 | 2006-03-01 | 株式会社东星硅树脂 | Silicon rubber foam and producing method and use thereof |
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| GB1031799A (en) * | 1963-02-18 | 1966-06-02 | Walker Mfg Co | Foamed plastic sorbent material and method for producing same |
| CN1740217A (en) * | 2004-08-27 | 2006-03-01 | 株式会社东星硅树脂 | Silicon rubber foam and producing method and use thereof |
| US20090047495A1 (en) * | 2005-05-20 | 2009-02-19 | Charlie Hubbs | Silicone-impregnated foam product and method for producing same |
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| CN114539609A (en) * | 2022-03-09 | 2022-05-27 | 东莞市汇朋高分子科技有限公司 | Silica gel sponge material and preparation method thereof |
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