CN117004210A - Preparation process of slow rebound sponge material - Google Patents
Preparation process of slow rebound sponge material Download PDFInfo
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- CN117004210A CN117004210A CN202310725405.0A CN202310725405A CN117004210A CN 117004210 A CN117004210 A CN 117004210A CN 202310725405 A CN202310725405 A CN 202310725405A CN 117004210 A CN117004210 A CN 117004210A
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- slow rebound
- sponge material
- foaming
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- 239000000463 material Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 23
- 239000003139 biocide Substances 0.000 claims abstract description 18
- 238000005187 foaming Methods 0.000 claims abstract description 18
- 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 17
- 239000003063 flame retardant Substances 0.000 claims abstract description 17
- 239000006260 foam Substances 0.000 claims abstract description 16
- 239000004088 foaming agent Substances 0.000 claims abstract description 16
- 239000003381 stabilizer Substances 0.000 claims abstract description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 13
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 13
- 239000000460 chlorine Substances 0.000 claims abstract description 13
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 13
- 229920000570 polyether Polymers 0.000 claims abstract description 13
- 229940114930 potassium stearate Drugs 0.000 claims abstract description 13
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 claims abstract description 13
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims abstract description 13
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 13
- 239000011593 sulfur Substances 0.000 claims abstract description 13
- 238000004108 freeze drying Methods 0.000 claims abstract description 8
- GODZNYBQGNSJJN-UHFFFAOYSA-N 1-aminoethane-1,2-diol Chemical compound NC(O)CO GODZNYBQGNSJJN-UHFFFAOYSA-N 0.000 claims abstract description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- 238000007710 freezing Methods 0.000 claims description 16
- 230000008014 freezing Effects 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000004073 vulcanization Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- -1 carbonate modified boehmite Chemical class 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 3
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical class O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 210000004027 cell Anatomy 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- 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
- C08J2205/00—Foams characterised by their properties
- C08J2205/06—Flexible foams
-
- 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
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
-
- 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
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/06—Sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a slow rebound sponge material, which comprises the following components in parts by weight: 50-60 parts of slow rebound polyether; 50-60 parts of active chlorine type acrylate rubber; 10-15 parts of glycol amine; 2-3 parts of sulfur; 1 to 1.5 portions of potassium stearate; 1 to 1.5 portions of sodium stearate; 1 to 1.5 portions of antibacterial mite-killing agent; 3-8 parts of flame retardant; 3-8 parts of foaming agent; 1 to 1.5 portions of foam stabilizer; 3-6 parts of catalyst. According to the invention, the antibacterial mite-killing agent is added, and is the modified boehmite of the polycyclopentadiene carbonate, so that the antibacterial mite-killing effect of the slow rebound sponge material can be improved, the sanitation grade is improved, the number of foam holes of the slow rebound sponge material can be increased in the freeze drying process after foaming, the foaming effect is improved, a new processing technology is integrated in a traditional preparation mode, and the quality of the prepared slow rebound sponge material can be improved.
Description
Technical Field
The invention relates to the technical field of preparation of slow rebound sponge materials, in particular to a preparation process of a slow rebound sponge material.
Background
Slow rebound sponges have slow rebound properties which are mainly due to their particular particulate structure, i.e. honeycomb structure. Under a microscope, the smallest unit of the slow rebound sponge consists of tiny cell cells (units), the cell wall of the cells is compact and can contain air, but only micropores are communicated with the outside and other cells, and the size of each cell structure is very uniform. The slow rebound sponge has the characteristics of heat preservation, heat insulation, sound absorption, shock absorption, flame retardance, static resistance, good air permeability and the like, so the slow rebound sponge relates to various industries, including the automobile industry, household articles, shoe industry manufacturing industry, special packaging manufacturing industry, high-grade furniture manufacturing industry and the like.
At present, banburying and one-step foaming molding are adopted in the preparation of the slow rebound sponge, and the freezing treatment is not carried out, so that the foaming quantity completely depends on a foaming agent, and the foaming effect is known to be improved through low-temperature drying, so that the technology is applied to the preparation of the slow rebound sponge, and the antibacterial effect of the slow rebound sponge is improved for the application of the slow rebound sponge, and therefore, the preparation process of the slow rebound sponge material is provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a preparation process of a slow rebound sponge material.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the slow rebound sponge material comprises the following components in parts by weight:
50-60 parts of slow rebound polyether;
50-60 parts of active chlorine type acrylate rubber;
10-15 parts of glycol amine;
2-3 parts of sulfur;
1 to 1.5 portions of potassium stearate;
1 to 1.5 portions of sodium stearate;
1 to 1.5 portions of antibacterial mite-killing agent;
3-8 parts of flame retardant;
3-8 parts of foaming agent;
1 to 1.5 portions of foam stabilizer;
3-6 parts of catalyst.
Preferably, the antibacterial mite-killing agent is a polycythene carbonate modified boehmite.
Preferably, 55 parts of slow rebound polyether; 50 parts of active chlorine type acrylate rubber; 10 parts of ethylene glycol amine; 2 parts of sulfur; 1 part of potassium stearate; 1 part of sodium stearate; 1 part of antibacterial mite-killing agent; 3 parts of flame retardant; 3 parts of foaming agent; 1 part of foam stabilizer; 3 parts of catalyst.
Preferably, 60 parts of slow rebound polyether; 50 parts of active chlorine type acrylate rubber; 10 parts of ethylene glycol amine; 2 parts of sulfur; 1 part of potassium stearate; 1 part of sodium stearate; 1.5 parts of antibacterial mite-killing agent; 3 parts of flame retardant; 4 parts of a foaming agent; 1.5 parts of foam stabilizer; 4 parts of catalyst.
A preparation process of a slow rebound sponge material comprises the following steps:
s1, proportioning: weighing raw materials in a specified weight part according to the requirement;
s2, stirring: stirring and banburying slow rebound polyether, active chlorine type acrylate rubber, glycol amine and flame retardant in an internal mixer to obtain a material A;
s3, foaming: mixing sulfur, potassium stearate, sodium stearate, an antibacterial mite-killing agent, a foaming agent, a foam stabilizer, a catalyst and a material A, adding the mixture into a double-roller mixer, mixing for 25-30 minutes, standing for 8-16 hours, pouring the obtained mixed solution into a mold, wherein the mold cavity filling coefficient is 103-126%, the mold pressure is 10-15 MPa, the vulcanization foaming temperature is 165-185 ℃, and the vulcanization foaming time is 13-16 minutes, so that the slow rebound memory sponge material can be obtained;
s4, freeze drying: the obtained slow rebound memory sponge material is put into a freezing chamber for freezing and drying;
s5, cutting: and (5) after the freezing is finished, recovering to normal temperature, and cutting out the specified size according to the requirement.
Preferably, the initial temperature in the banburying in the step S2 is set to 190-200 ℃, the rotating speed of the rotor is 70-80 r/min, and the mixing is performed for 25-30 minutes from the time of adding materials.
Preferably, the freezing temperature in the step S4 is-15 to-10 ℃, and the freezing time is 3 to 5 hours.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the antibacterial mite-killing agent is added, and is the modified boehmite of the polycyclopentadiene carbonate, so that the antibacterial mite-killing effect of the slow rebound sponge material can be improved, and the sanitary grade can be improved; the added flame retardant can enhance the flame retardant property of the slow rebound sponge material; the foaming agent and the foam stabilizer can ensure that the material is foamed stably, and after the material is foamed, the material is subjected to freeze drying treatment, the number of foaming holes of the slow rebound sponge material can be increased in the freeze drying process, the foaming effect is improved, a new processing technology is integrated in a traditional preparation mode, and the quality of the prepared slow rebound sponge material can be improved.
Drawings
Fig. 1 is a flow chart of a preparation process of a slow rebound sponge material provided by the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1, a slow rebound sponge material comprises the following components in parts by weight:
50-60 parts of slow rebound polyether;
50-60 parts of active chlorine type acrylate rubber;
10-15 parts of glycol amine;
2-3 parts of sulfur;
1 to 1.5 portions of potassium stearate;
1 to 1.5 portions of sodium stearate;
1 to 1.5 portions of antibacterial mite-killing agent;
3-8 parts of flame retardant;
3-8 parts of foaming agent;
1 to 1.5 portions of foam stabilizer;
3-6 parts of catalyst.
The antibacterial mite remover is a polycythene carbonate modified boehmite.
55 parts of slow rebound polyether; 50 parts of active chlorine type acrylate rubber; 10 parts of ethylene glycol amine; 2 parts of sulfur; 1 part of potassium stearate; 1 part of sodium stearate; 1 part of antibacterial mite-killing agent; 3 parts of flame retardant; 3 parts of foaming agent; 1 part of foam stabilizer; 3 parts of catalyst.
60 parts of slow rebound polyether; 50 parts of active chlorine type acrylate rubber; 10 parts of ethylene glycol amine; 2 parts of sulfur; 1 part of potassium stearate; 1 part of sodium stearate; 1.5 parts of antibacterial mite-killing agent; 3 parts of flame retardant; 4 parts of a foaming agent; 1.5 parts of foam stabilizer; 4 parts of catalyst.
A preparation process of a slow rebound sponge material comprises the following steps:
s1, proportioning: weighing raw materials in a specified weight part according to the requirement;
s2, stirring: stirring and banburying slow rebound polyether, active chlorine type acrylate rubber, glycol amine and flame retardant in an internal mixer to obtain a material A;
s3, foaming: mixing sulfur, potassium stearate, sodium stearate, an antibacterial mite-killing agent, a foaming agent, a foam stabilizer, a catalyst and a material A, adding the mixture into a double-roller mixer, mixing for 25-30 minutes, standing for 8-16 hours, pouring the obtained mixed solution into a mold, wherein the mold cavity filling coefficient is 103-126%, the mold pressure is 10-15 MPa, the vulcanization foaming temperature is 165-185 ℃, and the vulcanization foaming time is 13-16 minutes, so that the slow rebound memory sponge material can be obtained;
s4, freeze drying: the obtained slow rebound memory sponge material is put into a freezing chamber for freezing and drying;
s5, cutting: and (5) after the freezing is finished, recovering to normal temperature, and cutting out the specified size according to the requirement.
In the step S2, the initial temperature is set to 190-200 ℃, the rotating speed of the rotor is 70-80 r/min, and the mixing is performed for 25-30 minutes from the time of adding materials.
The freezing temperature in the step S4 is-15 to-10 ℃, and the freezing time is 3-5 hours.
Working principle: according to the invention, the antibacterial mite-killing agent is added, and is the modified boehmite of the polycyclopentadiene carbonate, so that the antibacterial mite-killing effect of the slow rebound sponge material can be improved, and the sanitary grade can be improved; the added flame retardant can enhance the flame retardant property of the slow rebound sponge material; the foaming agent and the foam stabilizer can ensure that the material is foamed stably, and after the material is foamed, the material is subjected to freeze drying treatment, the number of foaming holes of the slow rebound sponge material can be increased in the freeze drying process, the foaming effect is improved, a new processing technology is integrated in a traditional preparation mode, and the quality of the prepared slow rebound sponge material can be improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The slow rebound sponge material is characterized by comprising the following components in parts by weight:
50-60 parts of slow rebound polyether;
50-60 parts of active chlorine type acrylate rubber;
10-15 parts of glycol amine;
2-3 parts of sulfur;
1 to 1.5 portions of potassium stearate;
1 to 1.5 portions of sodium stearate;
1 to 1.5 portions of antibacterial mite-killing agent;
3-8 parts of flame retardant;
3-8 parts of foaming agent;
1 to 1.5 portions of foam stabilizer;
3-6 parts of catalyst.
2. A slow rebound sponge material as claimed in claim 1 wherein the antibacterial and mite-killing agent is a polycythene carbonate modified boehmite.
3. A slow rebound sponge material as claimed in claim 1 wherein the slow rebound polyether is 55 parts; 50 parts of active chlorine type acrylate rubber; 10 parts of ethylene glycol amine; 2 parts of sulfur; 1 part of potassium stearate; 1 part of sodium stearate; 1 part of antibacterial mite-killing agent; 3 parts of flame retardant; 3 parts of foaming agent; 1 part of foam stabilizer; 3 parts of catalyst.
4. A slow rebound sponge material as claimed in claim 1 wherein the slow rebound polyether is 60 parts; 50 parts of active chlorine type acrylate rubber; 10 parts of ethylene glycol amine; 2 parts of sulfur; 1 part of potassium stearate; 1 part of sodium stearate; 1.5 parts of antibacterial mite-killing agent; 3 parts of flame retardant; 4 parts of a foaming agent; 1.5 parts of foam stabilizer; 4 parts of catalyst.
5. A process for preparing a slow rebound sponge material as claimed in any one of claims 1 to 4 comprising the steps of:
s1, proportioning: weighing raw materials in a specified weight part according to the requirement;
s2, stirring: stirring and banburying slow rebound polyether, active chlorine type acrylate rubber, glycol amine and flame retardant in an internal mixer to obtain a material A;
s3, foaming: mixing sulfur, potassium stearate, sodium stearate, an antibacterial mite-killing agent, a foaming agent, a foam stabilizer, a catalyst and a material A, adding the mixture into a double-roller mixer, mixing for 25-30 minutes, standing for 8-16 hours, pouring the obtained mixed solution into a mold, wherein the mold cavity filling coefficient is 103-126%, the mold pressure is 10-15 MPa, the vulcanization foaming temperature is 165-185 ℃, and the vulcanization foaming time is 13-16 minutes, so that the slow rebound memory sponge material can be obtained;
s4, freeze drying: the obtained slow rebound memory sponge material is put into a freezing chamber for freezing and drying;
s5, cutting: and (5) after the freezing is finished, recovering to normal temperature, and cutting out the specified size according to the requirement.
6. The process for preparing a slow rebound sponge material as claimed in claim 5, wherein the initial temperature in the banburying in the step S2 is set to 190-200 ℃, the rotor rotation speed is 70-80 r/min, and the time-counting mixing is carried out for 25-30 minutes from the feeding.
7. The process for preparing a slow rebound sponge material as claimed in claim 5, wherein the freezing temperature in the step S4 is-15 to-10 ℃ and the freezing time is 3-5 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310725405.0A CN117004210A (en) | 2023-06-19 | 2023-06-19 | Preparation process of slow rebound sponge material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310725405.0A CN117004210A (en) | 2023-06-19 | 2023-06-19 | Preparation process of slow rebound sponge material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117004210A true CN117004210A (en) | 2023-11-07 |
Family
ID=88564436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310725405.0A Pending CN117004210A (en) | 2023-06-19 | 2023-06-19 | Preparation process of slow rebound sponge material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117004210A (en) |
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2023
- 2023-06-19 CN CN202310725405.0A patent/CN117004210A/en active Pending
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