CN110804206B - Elastic buffer component and preparation method thereof - Google Patents
Elastic buffer component and preparation method thereof Download PDFInfo
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- CN110804206B CN110804206B CN201911040020.0A CN201911040020A CN110804206B CN 110804206 B CN110804206 B CN 110804206B CN 201911040020 A CN201911040020 A CN 201911040020A CN 110804206 B CN110804206 B CN 110804206B
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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
- C08J9/36—After-treatment
- C08J9/365—Coating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
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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
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/228—Forming foamed products
- C08J9/232—Forming foamed products by sintering expandable particles
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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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
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/08—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The elastic buffer component comprises an elastic element and a hole sealing coating, wherein the elastic element comprises a plurality of irregularly arranged foaming particles, the outer walls of the foaming particles are mutually contacted and connected, one or more channels penetrating through the elastic element are formed among the foaming particles, the channels at least comprise one opening communicated with the outer surface of the elastic element, the hole sealing coating covers the outer surface of the elastic element, and the openings of the channels are sealed by the hole sealing coating. Meanwhile, the invention also discloses a preparation method of the elastic buffer component. The elastic buffer component provided by the invention can effectively prevent the water seepage problem and the pollution problem of the elastic element and has better resilience.
Description
Technical Field
The invention belongs to the technical field of foaming materials, and particularly relates to an elastic buffer component and a preparation method thereof.
Background
Currently, EVA and PU foam are the most commonly used cushioning shoe materials. These shoe material foaming materials are generally prepared by a chemical foaming method, and residues harmful to human bodies such as formamide exist in the foaming process. And the polymers forming the cross-linked structure in the preparation process of the PU and EVA foaming materials are difficult to melt and recycle, and the problems of environmental pollution are easily caused by physical landfill and incineration.
The newly applied foaming TPU elastomer shoe material (such as E-TPU material of Infinery series of Pasteur) adopts a supercritical fluid micro-foaming method, and well solves the problems of environmental pollution and difficult recovery. The shoe material which is light in quality, good in performance, green and environment-friendly is prepared by a method of hot-pressing the foaming elastomer beads through water vapor. However, the method of hot-press molding by water vapor is to make water vapor flow between different foamed elastomer beads and heat and melt the surfaces of the foamed elastomer beads, and due to the flowing effect of the water vapor, many holes are generated on the manufactured shoe material, and these holes can be permeable to water and air (as mentioned in patent CN103976504B of Adidas for "cushioning element for sports wear" and the like, these gaps are permeable to air and/or liquid), when the method is applied to the shoe material (especially insole, outsole), the shoe material cannot play a good role in waterproof and anti-seepage, and is particularly easy to be polluted, dirty and dirty, and is difficult to be cleaned. Meanwhile, due to the existence of the holes, larger gaps exist among the expanded elastomer beads, and the resilience performance of the expanded elastomer beads is influenced.
Disclosure of Invention
The invention provides an elastic buffer component and a preparation method thereof, aiming at the problems of holes, poor waterproof performance and influence on resilience in the existing steam hot-press molding process.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in one aspect, the invention provides an elastic buffer component, which comprises an elastic element and a hole sealing coating, wherein the elastic element comprises a plurality of irregularly arranged foaming particles, the outer walls of the plurality of foaming particles are in contact connection with each other, one or more channels penetrating through the elastic element are formed among the plurality of foaming particles, the channels at least have one opening communicated with the outer surface of the elastic element, the hole sealing coating covers the outer surface of the elastic element, and the openings of the channels are sealed by the hole sealing coating.
Optionally, the hole sealing coating covers all outer surfaces of the elastic elements, the number of the channels is multiple, at least two of the channels are communicated with each other, and air is trapped in the channels.
Optionally, the particle size of the foaming particles is 1-10 mm, and the density of the foaming particles is 0.1-0.5 g/mlcm3。
Optionally, the foamed particles comprise one or more of a foamed thermoplastic polyester elastomer, a foamed thermoplastic polyurethane elastomer, a foamed thermoplastic polyetheramide, a foamed thermoplastic polyolefin copolymer, a foamed thermoplastic polyethylene vinyl acetate, a foamed thermoplastic polypropylene, a foamed thermoplastic styrene block copolymer.
Optionally, the hole sealing coating comprises the following preparation raw materials in parts by weight:
40-60 parts of polyurethane prepolymer, 40-60 parts of acrylate monomer, 0.05-1 part of initiator and 0.5-5 parts of cross-linking agent.
Optionally, the acrylate monomer is selected from one or more of methyl methacrylate, butyl acrylate, ethyl acrylate, methyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, diacetone methacrylamide, stearyl methacrylate, stearyl acrylate, acrylic acid, and methacrylic acid.
Optionally, the hole sealing coating further comprises the following raw materials by weight:
0.1-2 parts of a flatting agent, 0.05-1 part of a defoaming agent and 0.5-10 parts of a rheological additive.
Optionally, the polyurethane prepolymer is selected from a polyester polyurethane prepolymer or a polyether polyurethane prepolymer.
Optionally, the polyether polyurethane prepolymer is obtained by polymerizing isocyanate and polyether diol, wherein the isocyanate is selected from one or more of isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexylmethane diisocyanate, the polyether diol is selected from one or more of polypropylene glycol, polytetramethylene glycol, polytetrahydrofuran diol and polyethylene glycol, and the molecular weight of the polyether diol is 800-4000.
In another aspect, the present invention provides a method for preparing an elastic buffer member as described above, comprising the following steps of:
placing the foaming particles into a mould, introducing steam for heating, melting the surfaces of the foaming particles in a steam heating and mould pressing mode, and bonding the foaming particles with each other to form an elastic element, wherein one or more through channels are formed in the elastic element, and at least one opening communicated with the outer surface of the elastic element is formed in each channel;
preparing a hole sealing coating, coating the hole sealing coating on the surface of the elastic element, and curing to obtain a hole sealing coating, wherein the opening of the channel is sealed by the hole sealing coating.
Optionally, the pressure of the water vapor is 0.15MPa to 0.30MPa, and the heating time is 30s to 100 s.
According to the elastic buffer part provided by the invention, the elastic element is formed by the foaming particles, the channel is formed inside the elastic element due to the limitation of a steam hot-press forming mode, the channel inside the elastic element can be effectively sealed by forming the hole sealing coating on the outer surface of the elastic element, the water seepage problem and the pollution problem of the elastic element can be effectively prevented, meanwhile, the protective layer is formed outside the elastic element, the air in the channel inside the elastic element is formed into a sealed shape, when pressure is applied, the air in the sealed channel can not flow out of the elastic element, and a good rebound effect can be generated by matching with the foaming particles.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An embodiment of the invention provides an elastic buffer component, which comprises an elastic element and a hole sealing coating, wherein the elastic element comprises a plurality of foaming particles which are randomly arranged, the outer walls of the foaming particles are mutually contacted and connected, one or more channels penetrating through the elastic element are formed among the foaming particles, the channels at least have one opening communicated with the outer surface of the elastic element, the hole sealing coating covers the outer surface of the elastic element, and the openings of the channels are sealed by the hole sealing coating.
The elastic buffer component provided by the embodiment is particularly suitable for being used as a middle sole and other sports buffer components, and has good elastic buffer, waterproof and friction-resistant performances.
Through foaming granule shaping elastic element, because the restriction of vapor hot briquetting mode has the passageway at elastic element inside, through being formed with the hole sealing coating on elastic element's surface, can effectively seal the inside passageway of elastic element can effectively prevent elastic element's infiltration problem and pollution problem, forms a protective layer in elastic element's outside simultaneously, forms the closed form with the air in the elastic element inside passage, when receiving pressure, the outside of elastic element can not flow out to the air in the closed passageway, can produce better resilience effect with the cooperation of foaming granule.
In one embodiment, the sealing coating covers the whole outer surface of the elastic element, the number of the channels is multiple, at least two of the channels are communicated with each other, and air is trapped in the channels.
In this embodiment, the channels in the elastic element are randomly distributed in the elastic element, so the channels communicate with each surface of the elastic element, different channels are communicated with each other, the channels can be closed only by covering the sealing coating on the elastic element, and due to the communication between the channels, air can flow inside each other, so that when pressure is applied, the air in the extruded channels flows to the adjacent channels, so that the elastic element can be deformed adaptively, and when the pressure is removed, the air is distributed in different channels again, and the elastic element recovers the original shape.
In one embodiment, the foamed particles have a particle size of 1 to 10mm and a density of 0.1 to 0.5g/cm3。
In a preferred embodiment, the foamed particles have a particle size of 4 to 8mm and a density of 0.15 to 0.3g/cm3。
In one embodiment, the foamed particles comprise one or more of a foamed thermoplastic polyester elastomer, a foamed thermoplastic polyurethane elastomer, a foamed thermoplastic polyetheramide, a foamed thermoplastic polyolefin copolymer, a foamed thermoplastic polyethylene vinyl acetate, a foamed thermoplastic polypropylene, a foamed thermoplastic styrene block copolymer.
In one embodiment, the hole sealing coating comprises the following raw materials in parts by weight:
40-60 parts of polyurethane prepolymer, 40-60 parts of acrylate monomer, 0.05-1 part of initiator and 0.5-5 parts of cross-linking agent.
The inventor finds through a large number of experiments that the hole sealing coating formed by copolymerizing the polyurethane prepolymer and the acrylate monomer and the elastic element formed by the thermoplastic polyurethane elastomer or the thermoplastic polyester elastomer have good affinity and bonding strength, the opening of the channel has good sealing performance, and the opening of the channel can be better sealed and blocked when the hole sealing coating is coated on the surface of the elastic element, so that air holes cannot be generated, the hole sealing coating after curing has high strength, the elastic element can be protected from scratch caused by external scratches, and the attractiveness is improved.
The initiator may be an inorganic peroxy initiator, or the like.
The cross-linking agent can adopt low molecular weight compounds of alcohols or amines to improve the cross-linking degree of the hole sealing coating.
In one embodiment, the acrylate monomer is selected from one or more of methyl methacrylate, butyl acrylate, ethyl acrylate, methyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, diacetone methacrylamide, stearyl methacrylate, stearyl acrylate, acrylic acid, and methacrylic acid.
In one embodiment, the hole sealing coating further comprises the following raw materials for preparing the components by weight:
0.1-2 parts of a flatting agent, 0.05-1 part of a defoaming agent and 0.5-10 parts of a rheological additive.
The leveling agent is used for improving the leveling property of the hole sealing coating and improving the flatness of a formed film.
The anti-foaming agent is used to avoid bubbles generated by the pore-sealing coating during deployment or application.
The rheological additive is used for preventing sagging and improving the film forming thickness.
The leveling agent, the defoaming agent and the rheological additive are all commonly used additives in the field, and the specific types of the additives can be selected according to the needs.
In some embodiments, the polyurethane prepolymer is selected from a polyester polyurethane prepolymer or a polyether polyurethane prepolymer.
Preferably, the polyurethane prepolymer is selected from polyether polyurethane prepolymers.
Specifically, the polyether polyurethane prepolymer is obtained by polymerizing isocyanate and polyether diol, wherein the isocyanate is selected from one or more of isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexylmethane diisocyanate, the polyether diol is selected from one or more of polypropylene glycol, polytetramethylene glycol, polytetrahydrofuran diol and polyethylene glycol, the molecular weight of the polyether diol is 800-4000, and preferably the molecular weight of the polyether diol is 1000-2000.
Another embodiment of the present invention provides a method for manufacturing the elastic buffer member as described above, including the following steps:
placing the foaming particles into a mould, introducing steam for heating, melting the surfaces of the foaming particles and bonding the foaming particles with each other by heating the foaming particles with the steam, and molding an elastic element with a certain shape in the mould in a compression mode, wherein one or more through channels are formed in the elastic element, and the channel at least has one opening communicated with the outer surface of the elastic element;
preparing a hole sealing coating, coating the hole sealing coating on the surface of the elastic element, and curing to obtain a hole sealing coating, wherein the opening of the channel is sealed by the hole sealing coating.
In some embodiments, the water vapor molding has a saturated vapor pressure of 0.15MPa to 0.30MPa and a heating time of 30s to 100 s.
In some embodiments, the expanded particles are prepared by a supercritical expansion process, comprising the following operating steps:
cutting thermoplastic elastomer into granules, adding the granular thermoplastic elastomer into a high-pressure device, and adding a volatile foaming agent, wherein the volatile foaming agent is CO2Or N2Heating to the softening point of the thermoplastic elastomer, pressurizing to enable the volatile foaming agent to be in a supercritical fluid state and permeate into the thermoplastic elastomer, and keeping the temperature and pressure;
after the permeation of the foaming agent is finished, the pressure is reduced to the normal pressure environment, the thermoplastic polyester elastomer is foamed instantly, and foaming particles of the thermoplastic elastomer are formed.
In some embodiments, the sealing coating is prepared by the following operation method:
adding the polyurethane prepolymer and the acrylate monomer into a reaction kettle, heating to 45 ℃, and stirring for 30 min; adding deionized water containing neutralizer, stirring at high speed, and emulsifying for 30 min; heating to 75 ℃, adding an aqueous solution containing an inorganic peroxide initiator, and reacting for 3-4 h under heat preservation; cooling to below 60 ℃, adding the cross-linking agent, stirring for 30min until the cross-linking agent is completely dissolved, filtering and discharging to obtain the hole sealing coating.
And coating the synthesized hole sealing coating on the surface of the elastic element, and drying and curing at 40-50 ℃ for 5-20 min to obtain the hole sealing coating.
In some embodiments, the polyurethane prepolymer is prepared by the following steps:
putting the dried and dehydrated polyester diol or polyether diol and a diisocyanate compound into a reaction kettle, introducing inert gas for protection, adding a catalyst, slowly stirring for reaction, slowly heating to 90 ℃, and reacting for about 1-2 hours until the isocyanate value reaches the theoretical content; cooling to 70 ℃, adding a chain extender to continue to react for about 0.5h, then heating to 85 ℃, increasing the stirring rate, adjusting the system viscosity by using a small amount of low molecular weight solvent, and reacting for 2h-3h until the isocyanate value reaches the new theoretical content. Cooling to 65 ℃, adding a cross-linking agent and a small amount of polymerization inhibitor to react for 2h-3h, and obtaining the corresponding polyester type polyurethane prepolymer or polyether type polyurethane prepolymer.
The present invention is further illustrated by the following examples.
Example 1
This embodiment is used to illustrate the elastic buffer component and the preparation method thereof disclosed by the present invention, and includes the following operation steps:
the preparation method comprises the following steps of (1) drying and dehydrating polytetrahydrofuran ether glycol at 120 ℃ in vacuum for 2 hours, then putting the polytetrahydrofuran ether glycol and isophorone diisocyanate into a reaction kettle, introducing inert gas for protection, adding a catalyst, stirring slowly for reaction, slowly heating to 90 ℃, and reacting for 1 hour to 2 hours; cooling to 70 ℃, adding a chain extender to continue the reaction for about 0.5h, then heating to 85 ℃, increasing the stirring rate, adjusting the viscosity of the system by using a small amount of low-molecular-weight solvent, and reacting for 2h-3 h. Cooling to 65 ℃, adding a cross-linking agent and a polymerization inhibitor to react for 2h-3h to obtain the polyurethane prepolymer A.
Adding the polyurethane prepolymer A and the acrylate monomer into a reaction kettle, heating to 45 ℃, and stirring for 30 min; adding deionized water solution containing neutralizer, stirring at high speed, and emulsifying for 30 min; heating to 75 ℃, adding a KPS-containing aqueous solution, and reacting for 3-4 h under heat preservation; cooling to below 60 ℃, adding the cross-linking agent, stirring for 30min until the cross-linking agent is completely dissolved, filtering and discharging to obtain the polyurethane acrylate emulsion.
And uniformly stirring 100 parts of polyurethane acrylate emulsion, 0.5 part of flatting agent, 0.1 part of defoaming agent and 1 part of rheological additive to obtain the antifouling and anti-scraping hole sealing paint.
Heating the foamed thermoplastic polyester elastomer particles by adopting a steam heating mode, and carrying out compression molding to obtain the elastic element of the foamed elastomer shoe material. Wherein the saturated steam pressure is 0.15MPa to 0.30MPa, and the heating time is 30s to 100 s.
And uniformly coating the synthesized hole sealing coating on the surface of the elastic element, placing the elastic element in a drying oven at 40-50 ℃, and drying for 5-10 min to completely cure the hole sealing coating and form a compact hole sealing coating on the surface of the elastic element.
Example 2
This example is used to illustrate the elastic buffer component and the preparation method thereof disclosed by the present invention, and includes most of the operation steps in example 1, and the differences are as follows:
the polyurethane prepolymer a in example 1 was replaced with a polyurethane prepolymer B, which was prepared as follows:
drying and dehydrating polytetrahydrofuran ether glycol at 120 ℃ in vacuum for 2 hours, putting the polytetrahydrofuran ether glycol and dicyclohexylmethane diisocyanate into a reaction kettle, introducing inert gas for protection, adding a catalyst, stirring slowly for reaction, slowly heating to 90 ℃, and reacting for 1 hour to 2 hours; cooling to 70 ℃, adding a chain extender to continue to react for 0.5h, then heating to 85 ℃, increasing the stirring rate, adjusting the viscosity of the system by using a small amount of low-molecular-weight solvent, and reacting for 2h-3 h. Cooling to 65 ℃, adding a cross-linking agent and a small amount of polymerization inhibitor to react for about 2-3 h to obtain a polyurethane prepolymer B.
Example 3
This example is used to illustrate the elastic buffer component and the preparation method thereof disclosed by the present invention, and includes most of the operation steps in example 1, and the differences are as follows:
foamed thermoplastic polyester elastomer particles in the examples were replaced with foamed thermoplastic polyurethane elastomer particles.
Example 4
This example is used to illustrate the elastic buffer component and the preparation method thereof disclosed by the present invention, and includes most of the operation steps in example 1, and the differences are as follows:
polyester diol is adopted to synthesize polyester type polyurethane prepolymer C, instead of polyether type polyurethane prepolymer A in example 1, the preparation method of polyurethane prepolymer C is as follows:
putting dried and dehydrated polyethylene glycol adipate (PEA) and isophorone diisocyanate into a reaction kettle, introducing inert gas for protection, adding a catalyst, stirring slowly for reaction, slowly heating to 90 ℃, and reacting for 1-2 h; cooling to 70 ℃, adding a chain extender to continue to react for 0.5h, then heating to 85 ℃, increasing the stirring rate, adjusting the viscosity of the system by using a small amount of low-molecular-weight solvent, and reacting for 2h-3 h. Cooling to 65 ℃, adding a cross-linking agent and a small amount of polymerization inhibitor to react for about 2-3 h to obtain a polyurethane prepolymer C.
Comparative example 1
This example is for comparative illustration of the elastic buffer member and the method for manufacturing the same disclosed in the present invention, and includes most of the operation steps in example 1, except that:
and no hole sealing coating is coated on the surface of the prepared elastic element.
Comparative example 2
This example is for comparative illustration of the elastic buffer component and the preparation method thereof disclosed in the present invention, and includes most of the operation steps in example 3, and the differences are that:
and no hole sealing coating is coated on the surface of the prepared elastic element.
Performance testing
The following performance tests were performed on the elastic cushioning members prepared in examples 1 to 4 and comparative examples 1 and 2 as follows:
water absorption of the material: immersing the elastic buffering component in water for 1h, taking out the elastic buffering component, extruding the elastic buffering component, and observing whether the elastic buffering component absorbs water or not;
carrying out a yellowing resistance test on the material, exposing the elastic buffer component to natural light for one month, and observing the yellowing condition of the material;
placing the material in an uncovered natural environment for one month, and observing the condition that the surface of the material is polluted;
the elastic buffer component was scratched with a pencil to observe the scratching of the surface of the elastic buffer component.
The test results obtained are filled in Table 1.
TABLE 1
| Test item | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 |
| Water absorption condition | ◎ | ◎ | ◎ | ○ | △ | △ |
| Yellowing resistant grade | >4 | >4 | >4 | >4 | 3 | 3 |
| Antifouling effect | ◎ | ◎ | ◎ | ◎ | △ | △ |
| Scratch mark | ◎ | ◎ | ◎ | ◎ | ○ | ○ |
And (3) water absorption condition: the surface of the material basically has no hanging water, and no water is produced by extrusion
O material surface has little water hanging and no water is produced by extrusion
The surface of the delta material is obviously provided with water hanging phenomenon and extruded with water
Antifouling effect: the surface of the material has a small amount of dust and does not accumulate after being wiped
O material surface has more dust and small accumulation after wiping
The surface of the delta material has a large amount of dust and is more accumulated after being wiped
Scratching: no obvious scratch on the surface of the material
Slight scratch on the surface of the material
The surface of the delta material has obvious scratch
As can be seen from the test results in table 1, compared with the elastic buffer component without the hole sealing coating, the elastic buffer component provided by the present invention has good waterproof, antifouling and yellowing resistance properties, and is not easy to scratch the material. The material can be effectively protected from water seepage and other pollution caused in the using and transporting processes, and the conditions of surface scratch and the like caused by collision or friction are avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An elastic buffer component is characterized by comprising an elastic element and a hole sealing coating, wherein the elastic element comprises a plurality of irregularly arranged foaming particles, the outer walls of the plurality of foaming particles are mutually contacted and connected, one or more channels penetrating through the elastic element are formed among the plurality of foaming particles, the channels at least have one opening communicated to the outer surface of the elastic element, the hole sealing coating covers the outer surface of the elastic element, and the openings of the channels are sealed by the hole sealing coating;
the hole sealing coating comprises the following preparation raw materials in parts by weight:
40-60 parts of polyurethane prepolymer, 40-60 parts of acrylate monomer, 0.05-1 part of initiator and 0.5-5 parts of cross-linking agent.
2. The elastomeric cushioning member of claim 1, wherein said sealing coating covers the entire outer surface of said elastomeric member, said plurality of channels being a plurality of at least two of said channels being in communication with each other, said channels having air trapped therein.
3. The elastic buffer member according to claim 1, wherein the expanded beads have a particle diameter of 1 to 10mm and a density of 0.1 to 0.5g/cm3。
4. The elastomeric cushioning member of claim 1, wherein the foamed particles comprise one or more of a foamed thermoplastic polyester elastomer, a foamed thermoplastic polyurethane elastomer, a foamed thermoplastic polyetheramide, a foamed thermoplastic polyolefin copolymer, a foamed thermoplastic polyethylene vinyl acetate, a foamed thermoplastic polypropylene, a foamed thermoplastic styrene block copolymer.
5. The elastomeric cushioning component of claim 1, wherein said acrylate monomer is selected from one or more of methyl methacrylate, butyl acrylate, ethyl acrylate, methyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, diacetone methacrylamide, stearyl methacrylate, stearyl acrylate, acrylic acid, methacrylic acid.
6. The elastomeric cushioning component of claim 1, wherein the pore sealing coating further comprises a raw material for preparing the following components by weight:
0.1-2 parts of a flatting agent, 0.05-1 part of a defoaming agent and 0.5-10 parts of a rheological additive.
7. The elastomeric cushioning member of claim 1, wherein said polyurethane prepolymer is selected from the group consisting of polyester polyurethane prepolymers and polyether polyurethane prepolymers.
8. The elastic buffer component according to claim 7, wherein the polyether polyurethane prepolymer is obtained by polymerizing isocyanate and polyether glycol, the isocyanate is selected from one or more of isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexylmethane diisocyanate, the polyether glycol is selected from one or more of polypropylene glycol, polytetramethylene glycol and polyethylene glycol, and the molecular weight of the polyether glycol is 800-4000.
9. A method for manufacturing an elastic buffer member according to any one of claims 1 to 8, characterized by comprising the following operating steps:
placing the foaming particles into a mould, introducing steam for heating, melting the surfaces of the foaming particles in a steam heating and mould pressing mode, and bonding the foaming particles with each other to form an elastic element, wherein one or more through channels are formed in the elastic element, and at least one opening communicated with the outer surface of the elastic element is formed in each channel;
preparing a hole sealing coating, coating the hole sealing coating on the surface of the elastic element, and curing to obtain a hole sealing coating, wherein the opening of the channel is sealed by the hole sealing coating.
10. The method of producing an elastic cushioning member according to claim 9, wherein said water vapor pressure is 0.15MPa to 0.30MPa, and the water vapor heating time is 30s to 100 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911040020.0A CN110804206B (en) | 2019-10-29 | 2019-10-29 | Elastic buffer component and preparation method thereof |
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| US20170051121A1 (en) * | 2014-04-30 | 2017-02-23 | Basf Se | Polyurethane particle foam with polyurethane coating |
| CN106543376A (en) * | 2016-11-25 | 2017-03-29 | 广州慧谷化学有限公司 | A kind of aqueous pu dispersions and preparation method for high abrasion elastic coating |
| CN207561443U (en) * | 2017-09-20 | 2018-07-03 | 晋江市辉燕塑胶有限公司 | A kind of expanded bead sole |
| CN108456325A (en) * | 2018-02-11 | 2018-08-28 | 宁波格林美孚新材料科技有限公司 | A kind of ultralight high resilience low thermal conductivity composite foam material of coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170051121A1 (en) * | 2014-04-30 | 2017-02-23 | Basf Se | Polyurethane particle foam with polyurethane coating |
| CN106543376A (en) * | 2016-11-25 | 2017-03-29 | 广州慧谷化学有限公司 | A kind of aqueous pu dispersions and preparation method for high abrasion elastic coating |
| CN207561443U (en) * | 2017-09-20 | 2018-07-03 | 晋江市辉燕塑胶有限公司 | A kind of expanded bead sole |
| CN108456325A (en) * | 2018-02-11 | 2018-08-28 | 宁波格林美孚新材料科技有限公司 | A kind of ultralight high resilience low thermal conductivity composite foam material of coating and preparation method thereof |
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