CN117986673A - Preparation method of polymer foam beads - Google Patents
Preparation method of polymer foam beads Download PDFInfo
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- CN117986673A CN117986673A CN202410151668.XA CN202410151668A CN117986673A CN 117986673 A CN117986673 A CN 117986673A CN 202410151668 A CN202410151668 A CN 202410151668A CN 117986673 A CN117986673 A CN 117986673A
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- polymer
- polymer foam
- foam beads
- coating
- particles
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- 229920000642 polymer Polymers 0.000 title claims abstract description 96
- 239000006260 foam Substances 0.000 title claims abstract description 73
- 239000011324 bead Substances 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000011248 coating agent Substances 0.000 claims abstract description 43
- 238000000576 coating method Methods 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 41
- 238000005187 foaming Methods 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims description 12
- 238000012216 screening Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 239000002666 chemical blowing agent Substances 0.000 claims description 2
- 229920001688 coating polymer Polymers 0.000 abstract description 3
- 239000000839 emulsion Substances 0.000 description 22
- -1 polypropylene Polymers 0.000 description 22
- 239000000243 solution Substances 0.000 description 19
- 239000004698 Polyethylene Substances 0.000 description 15
- 229920000573 polyethylene Polymers 0.000 description 15
- 238000005253 cladding Methods 0.000 description 9
- 239000004743 Polypropylene Substances 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 8
- 239000004088 foaming agent Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 229920006327 polystyrene foam Polymers 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 229920006248 expandable polystyrene Polymers 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920006124 polyolefin elastomer Polymers 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- CAMXVZOXBADHNJ-UHFFFAOYSA-N ammonium nitrite Chemical compound [NH4+].[O-]N=O CAMXVZOXBADHNJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 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
- 229920001206 natural gum Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention belongs to the technical field of materials, and particularly relates to a preparation method of polymer foam beads, which comprises the following steps: (1) Uniformly mixing polymer foaming particles with polymer coating material solution to obtain a mixed material; (2) Placing the mixed material into a coating stirring forming device, stirring and drying to obtain the polymer foam beads; the wrapping and stirring forming device is filled with strong convection air, the temperature is between-20 and 80 ℃, and the wind power is between 0.01 and 3MPa. The method can prepare polymer foam beads with coating structures, the polymer foam beads are formed by coating polymer foam particles with polymer coating materials, and the product can meet the requirements of polymer multifunctional foaming products with elasticity, toughness and rigidity.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a preparation method of polymer foam beads.
Background
The expandable polymer foam beads are bead-shaped foaming materials with continuous porous structures, which are prepared by taking polymers as a matrix, adding physical foaming agents, releasing pressure and foaming after a period of time, and then welding the polymer foam beads with each other through mould pressing equipment to prepare a polymer light foam product with a certain geometric structure, have the characteristics of light weight, energy absorption, heat insulation and the like, and are widely applied to the fields of packaging, vibration prevention, heat preservation and the like.
Currently, expandable polymer foam beads are mainly realized by single or blending modified polymer materials, such as expandable polypropylene foam beads (EPP), expandable polyethylene foam beads (EPE), expandable polystyrene foam beads (EPS), expandable polyurethane foam beads (ETPU), expandable thermoplastic elastomer foam beads (ETPE) and the like, and the expanded products produced by using the single expandable polymer foam beads have single functions, so that the multifunctional requirements of increasingly developed expanded products are met. Foamed articles of single expandable polymer foam beads either have only elasticity and lack rigidity; or only rigid and lacking in elasticity. For example, the product produced by EPS foam beads has relatively high rigidity and is not easy to deform, but has poor toughness, elasticity and compression strength, and is easy to deform under compression and can not recover and collide and break; the products produced by EPE and EPP foam beads are softer and more rigid, and the products are easy to deform under pressure when packaged, so that the packaged products are damaged. To satisfy the polymeric multifunctional foamed articles that are both elastic and rigid, it is difficult for single expandable polymeric foam beads to perform such foamed article functions.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of polymer foam beads, which can prepare polymer foam beads with coating structures. The polymer foam beads are formed by coating polymer foam particles with polymer coating materials, and the product can meet the requirements of polymer multifunctional foaming products with elasticity, toughness and rigidity.
The invention solves the problems by the following technical proposal:
The invention provides a preparation method of polymer foam beads, which comprises the following steps:
(1) Uniformly mixing polymer foaming particles with polymer coating material solution to obtain a mixed material;
(2) Placing the mixed material into a coating stirring forming device, stirring and drying to obtain the polymer foam beads; the wrapping and stirring forming device is filled with strong convection air, the temperature is between-20 and 80 ℃, and the wind power is between 0.01 and 3MPa.
Further, the weight ratio of the polymer foaming particles to the polymer coating material solution is 1: (0.1-1).
Further, the foaming multiplying power of the polymer foaming particle is 2-60 times, the internal foaming pore diameter is 1-100 mu m, and the density is 15-200kg/m 3.
Preferably, the polymer expanded particles include, but are not limited to, at least one of expandable polypropylene foam beads (EPP), expandable polyethylene foam beads (EPE), expandable polystyrene foam beads (EPS), expandable polyurethane foam beads (ETPU), expandable thermoplastic elastomer foam beads (ETPE), expandable polyphenylene ether (EPPE), and expandable polyethylene terephthalate (EPET).
Further, the solid content of the polymer coating material solution is 10-50%.
Preferably, the polymer coating material solution may be of a cross-linked or non-cross-linked type.
Preferably, the polymer coating material solution includes, but is not limited to, at least one of an ethylene-vinyl acetate copolymer (EVA) solution, a p-xylene solution of polypropylene (PP), a p-xylene solution of Polyethylene (PE), a polyolefin elastomer (POE) solution, a polyvinyl alcohol (PVA) solution, and a cyclohexanone solution of Polystyrene (PS).
Preferably, the polymer coating material solution includes, but is not limited to, at least one of a styrene-acrylic emulsion, a pure acrylic emulsion, a silicone-acrylic emulsion, an acrylic emulsion, and an acrylic emulsion.
Preferably, the polymer coating material solution includes, but is not limited to, at least one of an aqueous polyethylene emulsion, an aqueous polyurethane emulsion, an aqueous chlorinated polypropylene emulsion, an aqueous SBS emulsion, an aqueous epoxy resin emulsion, a natural gum emulsion, and a styrene-butadiene emulsion.
Further, the polymer coating material solution can also contain a chemical foaming agent; the mass of the chemical foaming agent is 0.3-1% of the mass of the polymer coating material solution. Preferably, the decomposition temperature of the chemical blowing agent is 60-80 ℃. When the chemical foaming agent is contained, the polymer coating material solution is a foamable polymer coating material solution, and the prepared polymer foam beads consist of polymer foaming particles coated by the polymer foaming material; the pore diameter of the polymer foaming polymer coating material is 100-500 mu m, and the density is 150-600kg/m 3.
Preferably, the chemical foaming agent includes, but is not limited to, at least one of sodium bicarbonate, ammonium carbonate, ammonium bicarbonate, ammonium nitrite, hydrogen peroxide.
The invention also provides a cladding moving forming device which comprises a mixing stirrer, a cladding moving rotary net cage, a high-pressure jet fan set, a vibration screening machine, a boiling dryer and a cladding particle storage tank.
Based on the coating agitation forming device, the invention puts the mixture of polymer foaming particles and polymer coating material solution into a mixing stirrer to be fully and uniformly mixed, the mixture is added into a coating agitation rotary net cage, the mixture is dried under the strong agitation of a high-pressure jet fan set, the temperature range is-20-80 ℃, the wind power range is 0.01-3MPa, the dried particles enter a vibration screening machine for screening, and the screened particles are further dried in a boiling dryer to obtain polymer foam beads and are conveyed to a coating particle storage tank for storage.
Further, the cladding movable rotary net cage is formed by weaving stainless steel wires, and the diameter of the net holes is 0.5-4.0mm.
The invention also provides the polymer foam beads prepared by the method, wherein the polymer foam beads are formed by coating polymer foam particles with polymer coating materials, the thickness of the coating layers is 0.1-1.5mm, and the surfaces of the coating layers are not mutually adhered.
The invention also provides application of the polymer foam beads in preparation of multi-performance foaming products, and the polymer foam beads can realize the multi-performance foaming products by utilizing the traditional foaming bead molding technology, so that single performance of the same material is avoided.
The invention has the beneficial effects that: the invention utilizes different material properties of the polymer, integrates the advantages of the respective materials, combines the polymer foam beads into the multifunctional foam beads, can meet different requirements of the multifunctional polymer foam products with elasticity, toughness and rigidity, and solves the problem of single property of the traditional polymer foam beads.
Drawings
Fig. 1: the invention relates to a schematic diagram of a coating movement forming device.
1-Mixing stirrer, 2-mesh, 3-cladding moving rotary net cage, 4-vibration screening machine, 5-high-pressure jet fan set, 6-boiling dryer and 7-cladding particle storage tank
Detailed Description
The present invention will be further described with reference to the following detailed description and the accompanying drawings, but the present invention is not limited thereto. The methods, such as those commonly used in the art, referred to herein are not specifically described and the reagents, such as those specifically described, are commercially available.
It should be noted in advance that the coating turbulence forming device used in the embodiment of the present invention and the comparative example is shown in fig. 1, and is composed of a mixing stirrer, a coating turbulence rotary net cage, a high-pressure jet fan set, a vibration screening machine, a boiling dryer and a coating particle storage tank. The working process of using the cladding movement forming device is as follows: the mixed material of polymer foaming particles and polymer coating material solution is placed in a mixing stirrer 1 to be fully and uniformly mixed, the mixed material is added into a coating rotary net cage 3, the mixed material is dried under the strong blowing and tumbling of a high-pressure jet fan group 5, the temperature is-20-80 ℃, the wind power is 0.01-3MPa, the gas temperature and the wind power are matched in the drying process, and the mixed material is dried in a low-temperature-low-pressure, low-temperature-high-pressure, high-temperature-low-pressure and high-temperature-high-pressure mode according to the technological requirements of the material. The dried particles enter a vibration screening machine 4 for screening, and the screened particles are further dried in a boiling dryer 6 to obtain polymer foam beads, and are conveyed to a coated particle storage tank 7 for storage. Wherein, the cladding is made of stainless steel wires, and the mesh 2 is arranged on the cladding, and the diameter of the mesh is 0.5-4.0mm.
Example 1:
(1) Polystyrene foam particles and aqueous polyurethane emulsion are mixed according to the weight ratio of 1:0.1, uniformly mixing to obtain a mixed material; the foaming multiplying power of the polystyrene foaming particles is 60 times, the internal foaming pore diameter is 1 mu m, and the density is 15kg/m 3; the solid content of the aqueous polyurethane emulsion is 40%.
(2) The mixture was placed in the above-described covered-turbulence forming apparatus and turned over and dried to give the polymer foam bead example 1; the wrapping and stirring forming device is filled with strong convection air, the temperature range is 30-60 ℃, and the wind power range is 0.01-2MPa. The polymer foam bead processing samples of example 1 were subjected to performance testing.
Comparative example 1: a polystyrene foam particle-processed sample having a foaming ratio of 60 times, an internal foaming pore size of 1 μm and a density of 15kg/m 3, which was the same as in example 1, was subjected to performance test, and compared with example 1.
Example 2:
(1) The polypropylene foaming particles and the styrene-acrylic emulsion are mixed according to the weight ratio of 1:0.5, uniformly mixing to obtain a mixed material; the expansion ratio of the polypropylene expanded particles is 15 times, the internal foaming pore diameter is 10 mu m, and the density is 60kg/m 3; the solid content of the styrene-acrylic emulsion is 50%.
(2) The mixture was placed in the above-described covered-turbulence forming apparatus and turned over and dried to give the polymer foam bead example 2; the wrapping and stirring forming device is filled with strong convection air, the temperature range is 50-80 ℃, and the wind power range is 0.5-2MPa. The polymer foam bead processing samples of example 2 were subjected to performance testing.
Comparative example 2: a polypropylene expanded particle processed sample having a foaming ratio of 15 times, an internal foaming pore size of 10 μm and a density of 60kg/m 3 as in example 2 was subjected to performance test, and compared with example 2.
Example 3:
(1) Polyethylene foaming particles and epoxy resin emulsion are mixed according to the weight ratio of 1:1, uniformly mixing to obtain a mixed material; the expansion ratio of the polyethylene expanded particles is 5 times, the internal foaming pore diameter is 20 mu m, and the density is 200kg/m 3; the epoxy resin emulsion has a solids content of 40%.
(2) The mixture was placed in the above-described covered-turbulence forming apparatus and turned over and dried to give the polymer foam bead example 3; the wrapping and stirring forming device is filled with strong convection air, the temperature range is 30-50 ℃, and the wind power range is 1-3MPa. The polymer foam bead processing samples of example 3 were subjected to performance testing.
Comparative example 3: a test piece of polyethylene foam particles having a 5-fold expansion ratio, an internal foam pore diameter of 20 μm and a density of 200kg/m 3, similar to that of example 3, was subjected to performance test, and compared with example 3.
Example 4:
(1) Adding 1wt% of sodium bicarbonate into the aqueous polyethylene emulsion to obtain sodium bicarbonate foaming agent mixed solution of the aqueous polyethylene emulsion, and mixing polystyrene foaming particles with the sodium bicarbonate foaming agent mixed solution of the aqueous polyethylene emulsion according to the weight ratio of 1:0.5, uniformly mixing to obtain a mixed material; the foaming multiplying power of the polystyrene foaming particles is 20 times, the internal foaming pore diameter is 15 mu m, and the density is 46kg/m 3; the solid content of the aqueous polyethylene emulsion is 35%.
(2) The mixture was placed in the above-described covered-turbulence forming apparatus and turned over and dried to give the polymer foam bead example 4; the coating and stirring forming device is filled with strong convection air, the temperature range is 30-80 ℃, the wind power range is 0.5-2MPa, and in the drying process of the polymer foam beads, the polyethylene coating surface layer is foamed to prepare polymer foam beads formed by coating polystyrene foam particles with polyethylene foam coating materials; the pore size of the polyethylene foam coating material is 100 μm, and the density is 150kg/m 3. The polymer foam bead processing samples of example 4 were subjected to performance testing.
Comparative example 4: a polystyrene foam particle processed sample having a foaming ratio of 20 times, an internal foaming pore size of 15 μm and a density of 46kg/m 3, which was the same as in example 4, was subjected to performance test and compared with example 4.
The test results are shown in table 1 below:
TABLE 1
The results show that the polymer foam beads combined by the invention have multifunctional application performance by combining the advantages of the respective materials, can meet different requirements of the polymer multifunctional foaming products with elasticity, toughness and rigidity, and solve the problem of single performance of the traditional polymer foaming particles.
It will be understood that the above embodiments are further illustrative of the present invention and are not intended to limit the scope of the invention, and that all other modifications and variations which may be obtained without the inventive effort by those skilled in the art are within the scope of the invention.
Claims (10)
1. A method of preparing polymer foam beads, comprising the steps of:
(1) Uniformly mixing polymer foaming particles with polymer coating material solution to obtain a mixed material;
(2) Placing the mixed material into a coating stirring forming device, stirring and drying to obtain the polymer foam beads; the wrapping and stirring forming device is filled with strong convection air, the temperature is between-20 and 80 ℃, and the wind power is between 0.01 and 3MPa.
2. The method of preparing polymer foam beads according to claim 1, wherein the weight ratio of polymer expanded particles to polymer coating material solution is 1: (0.1-1).
3. The method for preparing polymer foam beads according to claim 1, wherein the polymer foam particles have a foaming ratio of 2 to 60 times, an internal foaming pore size of 1 to 100 μm and a density of 15 to 200kg/m 3.
4. The method of preparing polymer foam beads according to claim 1, wherein the polymer coating material solution has a solids content of 10-50%.
5. The method of preparing polymer foam beads according to claim 1, wherein the polymer coating material solution contains a chemical blowing agent.
6. A method of preparing polymer foam beads according to claim 1, wherein the covered-turbulence forming device comprises a mixing agitator, a covered-turbulence rotating cage, a high-pressure jet fan set, a vibratory screening machine, a boiling dryer, and a covered-particle storage tank.
7. The method of preparing polymer foam beads according to claim 6, wherein the step (2) comprises the steps of: placing the mixed materials into a mixing stirrer, fully and uniformly mixing, adding into a coating stirring rotary net cage, drying under strong stirring of a high-pressure jet fan set at the temperature of-20-80 ℃ and the wind power of 0.01-3MPa, screening the dried particles by a vibration screening machine, further drying the screened particles in a boiling dryer to obtain polymer foam beads, and conveying the polymer foam beads to a coating particle storage tank for storage.
8. A polymer foam bead prepared by the method of any one of claims 1-7.
9. The polymer foam beads according to claim 8, wherein the polymer foam beads consist of polymer coated material coating the polymer expanded particles.
10. Use of the polymer foam beads according to any of claims 8 to 9 for the preparation of a multi-functional foamed article.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410151668.XA CN117986673A (en) | 2024-02-02 | 2024-02-02 | Preparation method of polymer foam beads |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410151668.XA CN117986673A (en) | 2024-02-02 | 2024-02-02 | Preparation method of polymer foam beads |
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| Publication Number | Publication Date |
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| CN117986673A true CN117986673A (en) | 2024-05-07 |
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| CN202410151668.XA Pending CN117986673A (en) | 2024-02-02 | 2024-02-02 | Preparation method of polymer foam beads |
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| CN (1) | CN117986673A (en) |
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