CN110604352A - Foam mask and preparation process thereof - Google Patents

Foam mask and preparation process thereof Download PDF

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Publication number
CN110604352A
CN110604352A CN201910894406.1A CN201910894406A CN110604352A CN 110604352 A CN110604352 A CN 110604352A CN 201910894406 A CN201910894406 A CN 201910894406A CN 110604352 A CN110604352 A CN 110604352A
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CN
China
Prior art keywords
prepolymer
veneering piece
veneering
piece
foam mask
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910894406.1A
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Chinese (zh)
Inventor
龙永杰
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DONGGUAN TAIKANG FOAM SPONGE Co Ltd
Original Assignee
DONGGUAN TAIKANG FOAM SPONGE Co Ltd
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Priority to CN201910894406.1A priority Critical patent/CN110604352A/en
Publication of CN110604352A publication Critical patent/CN110604352A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • 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
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203—Polyhydroxy compounds
    • C08G18/3206—Polyhydroxy compounds aliphatic
    • 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
    • C08G18/4833—Polyethers containing oxyethylene units
    • C08G18/4837—Polyethers containing oxyethylene units and other oxyalkylene 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
    • C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
    • C08G18/6484—Polysaccharides and derivatives thereof
    • 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
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • C08G18/6677—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203 having at least three hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • 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
    • C08K3/34—Silicon-containing compounds
    • C08K3/346—Clay
    • 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
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
    • 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

Abstract

The invention relates to the technical field of masks, in particular to a foam mask and a preparation process thereof, wherein the foam mask comprises a first veneering piece and a second veneering piece which are symmetrically arranged, the inner end of the first veneering piece is connected with the inner end of the second veneering piece in a pressing way to form a pressing connection seam, the outer end of the first veneering piece is provided with a first ear hanging hole, and the outer end of the second veneering piece is provided with a second ear hanging hole; the first veneering piece and the second veneering piece are both formed by hot-pressing hydrophilic polyurethane materials. The foam mask disclosed by the invention is made of a hydrophilic polyurethane material, has no stimulation to human skin, is soft, skin-friendly and comfortable, and has good air permeability; the preparation process of the foam mask is simple to operate, easy to control, high in production efficiency and low in production cost, and the prepared foam mask is stable in quality, not prone to cracking at a hot-pressing joint, stable in fit with a human body, soft, skin-friendly, comfortable and good in air permeability by strictly controlling condition parameters in the preparation process.

Description

Foam mask and preparation process thereof
Technical Field
The invention relates to the technical field of masks, in particular to a foam mask and a preparation process thereof.
Background
With the improvement of life quality of people, the requirements on living environment are higher and higher, the pursuit of health is also improved, but as the quantity of vehicle waste gas and dust particles in the living environment is increased, people gradually tend to wear the mask to go out so as to reduce the quantity of sucked dust particles and waste gas.
The mask on the market at present is various in types and materials, the protection effect on inhalable particles is poor, the connection resilience of the ear band part and the shielding part is small, so that the ear band part and the shielding part are easy to break, meanwhile, the texture is rough, the flexibility is poor, the skin of the face is rubbed after being worn, and the use feeling is low.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the foam mask which is made of a hydrophilic polyurethane material, has no stimulation to human skin, is soft, skin-friendly and comfortable, and has good air permeability.
The invention also aims to provide a preparation process of the foam mask, which has the advantages of simple operation, easy control, high production efficiency and low production cost, can ensure that the prepared foam mask has stable quality, is not easy to crack at a hot-pressing joint, is stably attached to a human body, and is soft, skin-friendly, comfortable and good in air permeability.
The invention further aims to provide another preparation process of the foam mask, which is simple to operate, easy to control, high in production efficiency and low in production cost, can ensure that the prepared foam mask has stable quality, the hot-pressing joint is not easy to crack, the foam mask is stably attached to a human body, and the foam mask is soft, skin-friendly, comfortable and good in air permeability.
The purpose of the invention is realized by the following technical scheme: a foam mask comprises a first veneering piece and a second veneering piece which are symmetrically arranged, wherein the inner end of the first veneering piece is connected with the inner end of the second veneering piece in a pressing mode to form a pressing connection seam, a first ear hanging hole is formed in the outer end of the first veneering piece, and a second ear hanging hole is formed in the outer end of the second veneering piece; the first veneering piece and the second veneering piece are both formed by hot-pressing hydrophilic polyurethane materials.
The foam mask disclosed by the invention has the advantages that the hydrophilic polyurethane material is adopted, the foam mask has no stimulation to the skin of a human body, is soft, skin-friendly and comfortable, the air permeability is good, the hot-pressing joint of the first veneering piece and the second veneering piece is not easy to crack, the quality is stable, and the foam mask is stably attached to the human body. Wherein, the first hangers hole and the second hangers hole that set up are used for human ear to wear to hang, and then realize the wearing of bubble cotton gauze mask.
Preferably, a first ventilation part is arranged at the upper part of the pressing end of the first veneering piece, and a second ventilation part is arranged at the lower part of the pressing end of the first veneering piece; and a third ventilation part is arranged at the upper part of the pressing end of the second veneering piece, and a fourth ventilation part is arranged at the lower part of the pressing end of the second veneering piece.
According to the invention, the first ventilating part, the second ventilating part, the third ventilating part and the fourth ventilating part are arranged, so that the air convection exchange between the inside and the outside of the mask can be carried out through the ventilating parts after a human body wears the mask, and the air permeability of the foam mask is improved.
Preferably, the thicknesses of the first veneering piece and the second veneering piece are both 1.8-2.2mm, and the thicknesses of the first ventilation part, the second ventilation part, the third ventilation part and the fourth ventilation part are all 0.1-0.2 mm.
According to the invention, the thicknesses of the first veneering piece and the second veneering piece are strictly controlled, so that the first veneering piece and the second veneering piece are soft, skin-friendly and comfortable, the air permeability is good, the veneering with a human body is stable, if the thickness is too large, stuffy feeling is easily caused, the air permeability is reduced, and the comfortable sensation of wearing the mask is reduced; if the thickness is too small, abrasion, tearing and the like are likely to occur, and the performance of blocking external dust particles is reduced, and the service life of the mask is reduced. The thicknesses of the first ventilation part, the second ventilation part, the third ventilation part and the fourth ventilation part are strictly controlled, so that the air can realize the convection exchange of air flow inside and outside the mask through the ventilation parts, and the ventilation of the foam mask is improved; if the thickness is too large, the convection exchange performance of air is reduced, and the air permeability is low; if the thickness is small, the blocking property against external dust particles is reduced.
Preferably, the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 60-70: 30-40; each part of prepolymer B comprises 30-35 parts of a polymer of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene, 65-70 parts of a polymer of cresyl diisocyanate, trimethylolpropane and polyethylene glycol.
According to the invention, the hydrophilic polyurethane material is prepared by adopting the materials, and the mixing ratio of the prepolymer A and the prepolymer B is strictly controlled, so that the prepared hydrophilic polyurethane is soft, skin-friendly and comfortable, and the prepared foam mask has better softness, skin-friendly property, wearing comfort, high air permeability, no harm to a human body, and stable bonding with the human body, and the hot-pressing joint of the first veneering piece and the second veneering piece is not easy to crack, and the quality is stable.
Wherein, the polymer of alpha-hydrogen-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene adopted in the prepolymer B is the existing substance, the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol is also the existing substance, the two are NCO end groups provided in the system and react with water in the prepolymer A to generate unstable carbamic acid, the generated carbamic acid is quickly decomposed into amine and carbon dioxide, and the released carbon dioxide gas plays a role in foaming, so that the polyurethane material generates uniform and fine bubbles to generate the foam. More preferably, the polymer of α -hydro- ω -hydroxypoly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene is predominantly HYPOL from Dow chemical, Inc. (Guangzhou)TMJT 6000 prepolymer, the polymer of tolyl diisocyanate with trimethylolpropane and polyethylene glycol being predominantly HYPOL from Dow chemical (Guangzhou) IncTM4000 parts of prepolymer. Preferably, the prepolymer A comprises the following raw materials in parts by weight:
preferably, the defoaming agent is a mixture of polydimethylsiloxane and a silicone defoaming agent in a weight ratio of 3-5: 2.
According to the invention, the hydrophilic polyurethane material is prepared by adopting the materials, so that the prepared hydrophilic polyurethane is soft, skin-friendly and comfortable, and the prepared foam mask has better softness, skin-friendly property and wearing comfort, high air permeability, no harm to a human body and stable attachment with the human body, and the hot-pressing connection part of the first attachment piece and the second attachment piece is not easy to crack and has stable quality.
The wollastonite is used as a filler, so that the dispersibility of each material of the prepolymer A can be improved, and the prepolymer A is filled to improve the stability of the prepolymer A; the adopted iodopropynyl butylcarbamate can improve the antibacterial property of the prepolymer A and the foam mask, and reduce and avoid the breeding and reproduction of bacteria; the adopted polymer of propylene oxide and ethylene oxide and emulsifying wax can improve the wetting effect of all materials in the prepolymer A, reduce the surface energy of the prepolymer A and improve the mixing compatibility of the prepolymer A and the prepolymer B; the adopted defoaming agent can reduce and inhibit bubbles generated in the process of preparing the prepolymer A and the foamed plastic material by mixing materials; the adopted color paste can be adjusted and selected according to actual requirements, so that the prepared foam mask has diversified colors. More preferably, the polymer of propylene oxide and ethylene oxide is a polymer of propylene oxide and ethylene oxide available under the product number 3467951 from Guangzhou Weber technologies, Inc.
Preferably, the prepolymer A comprises the following raw materials in parts by weight:
according to the invention, the hydrophilic polyurethane material is prepared by adopting the materials, so that the prepared hydrophilic polyurethane is soft, skin-friendly and comfortable, and the prepared foam mask has better softness, skin-friendly property and wearing comfort, high air permeability, no harm to a human body and stable attachment with the human body, and the hot-pressing connection part of the first attachment piece and the second attachment piece is not easy to crack and has stable quality.
The adopted carboxymethyl cellulose can improve the hygroscopicity of the prepolymer A and the foam mask, so that the prepared mask can effectively absorb the moisture of the outside air, is suitable for the air environment with higher humidity and plays a role in isolating the humid air; the adopted polymer of the propylene oxide and the ethylene oxide can improve the wetting effect of all materials in the prepolymer A, reduce the surface energy of the prepolymer A and improve the mixing compatibility of the prepolymer A and the prepolymer B; the citric acid can improve the bacteriostatic and antibacterial properties of the prepolymer A and the foam mask. Specifically, the polymer of propylene oxide and ethylene oxide is a polymer of propylene oxide and ethylene oxide, which is manufactured by Guangzhou Weber technologies, Inc. under the product number of 3467951.
The other purpose of the invention is realized by the following technical scheme: the preparation process of the foam mask comprises the following steps:
step A: adding wollastonite, iodopropynyl butylcarbamate, a polymer of propylene oxide and ethylene oxide, emulsifying wax, a defoaming agent and color paste into water according to the parts by weight, and mixing and stirring for 30-60min to obtain a prepolymer A;
and B: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 30-60min to prepare prepolymer B;
and C: uniformly mixing the prepolymer A prepared in the step A and the prepolymer B prepared in the step B according to the weight ratio of 3-5:2, injecting the mixture into a mold, controlling the temperature to be 15-20, and standing for 3-10min to prepare a foaming body;
step D: c, slicing the foaming body prepared in the step C, wherein the thickness of the sliced sheet is controlled to be 2.5-2.8 mm; if the thickness of the slice is smaller, the thickness of the foam mask is smaller after baking and drying, so that the barrier property to external dust particles is reduced, the foam mask is easy to damage, and the service life is shortened;
step E: placing the sliced foaming body in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to obtain a first veneering piece with a first ear hanging hole and a second veneering piece with a second ear hanging hole; the microwave baking and drying mode is adopted, so that water molecules in the foaming body can promote the evaporation of water through thermal movement, and the evaporation efficiency and the evaporation uniformity of the water are improved; and if the traditional hot air drying modes such as an oven are adopted, the surface of the product is easy to dry faster, the internal drying of the product is slower, the drying is not uniform, and the water content of the foaming body is difficult to control. On the other hand, when the foam is baked and dried and then sliced, the energy consumption for drying is greatly increased, and it is difficult to dry the interior of the foam just produced uniformly.
Step F: e, connecting the end of the first veneering piece far away from the first ear hanging hole and the end of the second veneering piece far away from the second ear hanging hole in a hot pressing mode to obtain the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging. After the hot-pressing connection, the hot-pressing connection position of the first veneering piece and the second veneering piece is firm and stable, and is not easy to crack, and burrs are trimmed at the hot-pressing connection position.
Preferably, in the step E, the baking and drying temperature is 75-83 ℃, and the time is 30-45 min; in the step F, the thermal compression pressure is 800-.
The preparation process of the foam mask is simple to operate, easy to control, high in production efficiency and low in production cost, and the prepared foam mask is stable in quality, not prone to cracking at a hot-pressing joint, stable in fit with a human body, soft, skin-friendly, comfortable and good in air permeability by strictly controlling condition parameters in the preparation process.
The other purpose of the invention is realized by the following technical scheme: the preparation process of the foam mask comprises the following steps:
step S1: adding carboxymethyl cellulose, a polymer of propylene oxide and ethylene oxide and citric acid into water according to parts by weight, and mixing and stirring for 30-60min to obtain a prepolymer A;
step S2: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 30-60min to prepare prepolymer B;
step S3: uniformly mixing the prepolymer A prepared in the step S1 and the prepolymer B prepared in the step S2 according to the weight ratio of 3-5:2, then pouring the mixture on release paper, controlling the thickness of the pouring to be 2.5-2.8mm, controlling the temperature to be 13-18 ℃, and standing for 3-10min to prepare a foaming body; if the thickness of the casting is smaller, the thickness of the foam mask is thinner after baking and drying, so that the barrier property to external dust particles is reduced, the foam mask is easy to damage, and the service life is shortened;
step S4: placing the foaming body prepared in the step S3 in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to prepare a first veneering piece with a first ear hanging hole and a second veneering piece with a second ear hanging hole; the microwave baking and drying mode is adopted, so that water molecules in the foaming body can promote the evaporation of water through thermal movement, and the evaporation efficiency and the evaporation uniformity of the water are improved; and if the traditional hot air drying modes such as an oven are adopted, the surface of the product is easy to dry faster, the internal drying of the product is slower, the drying is not uniform, and the water content of the foaming body is difficult to control. On the other hand, when the foam is baked and dried and then sliced, the energy consumption for drying is greatly increased, and it is difficult to dry the interior of the foam just produced uniformly.
Step S5: connecting the end of the first veneering piece far away from the first ear hanging hole and the end of the second veneering piece far away from the second ear hanging hole, which are prepared in the step S4, in a hot pressing manner to prepare the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging. After the hot-pressing connection, the hot-pressing connection position of the first veneering piece and the second veneering piece is firm and stable, and is not easy to crack, and burrs are trimmed at the hot-pressing connection position.
Preferably, in the step S4, the baking and drying temperature is 73-78 ℃, and the time is 30-40 min; in the step S5, the thermal compression pressure is 800-.
The preparation process of the foam mask is simple to operate, easy to control, high in production efficiency and low in production cost, and the prepared foam mask is stable in quality, not prone to cracking at a hot-pressing joint, stable in fit with a human body, soft, skin-friendly, comfortable and good in air permeability by strictly controlling condition parameters in the preparation process.
The invention has the beneficial effects that: the foam mask disclosed by the invention is made of a hydrophilic polyurethane material, has no stimulation to human skin, and is soft, skin-friendly, comfortable and good in air permeability.
The preparation process of the foam mask is simple to operate, easy to control, high in production efficiency and low in production cost, and the prepared foam mask is stable in quality, not prone to cracking at a hot-pressing joint, stable in fit with a human body, soft, skin-friendly, comfortable and good in air permeability by strictly controlling condition parameters in the preparation process.
Drawings
FIG. 1 is a schematic view of a first and second facing materials of the present invention in a folded configuration;
FIG. 2 is a schematic view of the wearing effect of the present invention;
the reference signs are: 1-first veneering piece, 11-first ear hanging hole, 12-first ventilation part, 13-second ventilation part, 2-second veneering piece, 21-second ear hanging hole, 22-third ventilation part, 23-fourth ventilation part and 3-pressing connecting seam.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings 1-2, and the content of the embodiments is not intended to limit the present invention.
Example 1
Referring to fig. 1-2, a foam mask comprises a first veneering piece 1 and a second veneering piece 2 which are symmetrically arranged, wherein the inner ends of the first veneering piece 1 and the second veneering piece 2 are connected in a pressing manner to form a pressing connection seam 3, the outer end of the first veneering piece 1 is provided with a first ear hanging hole 11, and the outer end of the second veneering piece 2 is provided with a second ear hanging hole 21; the first veneering piece 1 and the second veneering piece 2 are both formed by hot-pressing hydrophilic polyurethane materials.
A first ventilation part 12 is arranged at the upper part of the pressing end of the first veneering piece 1, and a second ventilation part 13 is arranged at the lower part of the pressing end of the first veneering piece 1; the upper part of the pressing end of the second veneering piece 2 is provided with a third ventilation part 22, and the lower part of the pressing end of the second veneering piece 2 is provided with a fourth ventilation part 23.
The thickness of the first veneering piece 1 and the thickness of the second veneering piece 2 are both 1.8-2.2mm, and the thickness of the first ventilation part 12, the thickness of the second ventilation part 13, the thickness of the third ventilation part 22 and the thickness of the fourth ventilation part 23 are all 0.1-0.2 mm.
Specifically, the thicknesses of the first veneering piece 1 and the second veneering piece 2 are both 1.8mm, 1.9mm, 2.0mm, 2.1mm or 2.2 mm; the thicknesses of the first air-permeable part 12, the second air-permeable part 13, the third air-permeable part 22 and the fourth air-permeable part 23 are all 0.1mm, 0.12mm, 0.15mm, 0.18mm or 0.2 mm.
Example 2
This embodiment differs from embodiment 1 described above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 60-70: 30-40; each part of prepolymer B comprised 30 parts of a polymer of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) with 1, 3-diisocyanatotoluene, 70 parts of a polymer of cresyl diisocyanate with trimethylolpropane and polyethylene glycol.
The prepolymer A comprises the following raw materials in parts by weight:
the defoaming agent is a mixture of polydimethylsiloxane and an organic silicon defoaming agent in a weight ratio of 3: 2.
The preparation process of the foam mask comprises the following steps:
step A: adding wollastonite, iodopropynyl butylcarbamate, a polymer of propylene oxide and ethylene oxide, emulsifying wax, a defoaming agent and color paste into water according to the parts by weight, and mixing and stirring for 30min to obtain a prepolymer A;
and B: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 30min to obtain prepolymer B;
and C: uniformly mixing the prepolymer A prepared in the step A and the prepolymer B prepared in the step B according to the weight ratio of 3:2, then injecting the mixture into a mold, controlling the temperature to be 15 ℃, and standing for 3min to prepare a foaming body;
step D: c, slicing the foaming body prepared in the step C, wherein the thickness of the sliced sheet is controlled to be 2.5 mm;
step E: placing the sliced foam into microwave equipment for baking and drying, wherein the baking temperature is 73 ℃, the baking time is 40min, the water content of the foam is controlled to be less than 4%, and then cutting and molding are carried out to obtain a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step F: e, connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21 in a hot pressing mode to obtain the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step E, the baking and drying temperature is 75 ℃, and the baking time is 45 min; and in the step F, the hot-pressing pressure is 800N, the hot-pressing temperature is 220 ℃, and the hot-pressing time is 8 s.
Example 3
This embodiment differs from embodiment 1 described above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 60: 40; each part of prepolymer B comprised 32 parts of a polymer of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) with 1, 3-diisocyanatotoluene, 68 parts of a polymer of cresyl diisocyanate with trimethylolpropane and polyethylene glycol.
The prepolymer A comprises the following raw materials in parts by weight:
the defoaming agent is a mixture of polydimethylsiloxane and an organic silicon defoaming agent in a weight ratio of 4: 2.
The preparation process of the foam mask comprises the following steps:
step A: adding wollastonite, iodopropynyl butylcarbamate, a polymer of propylene oxide and ethylene oxide, emulsifying wax, a defoaming agent and color paste into water according to the parts by weight, and mixing and stirring for 45min to obtain a prepolymer A;
and B: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 45min to obtain prepolymer B;
and C: uniformly mixing the prepolymer A prepared in the step A and the prepolymer B prepared in the step B according to the weight ratio of 4:2, then injecting the mixture into a mold, controlling the temperature to be 18 ℃, and standing for 5min to prepare a foaming body;
step D: c, slicing the foaming body prepared in the step C, wherein the thickness of the sliced sheet is controlled to be 2.6 mm;
step E: placing the sliced foaming body in microwave equipment for baking and drying, wherein the baking temperature is 73-78 ℃, the baking time is 30-40min, the water content of the foaming body is controlled to be less than 3%, and then cutting and forming are carried out to obtain a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step F: e, connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21 in a hot pressing mode to obtain the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step E, the baking and drying temperature is 78 ℃, and the baking time is 38 min; in the step F, the hot-pressing pressure is 1200N, the hot-pressing temperature is 200 ℃, and the hot-pressing time is 10 s.
Example 4
This embodiment differs from embodiment 1 described above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 66.7: 33.3; each part of prepolymer B comprised 33.3 parts of a-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) polymer with 1, 3-diisocyanatotoluene, 66.7 parts of a polymer of cresyl diisocyanate with trimethylolpropane and polyethylene glycol.
The prepolymer A comprises the following raw materials in parts by weight:
the defoaming agent is a mixture of polydimethylsiloxane and an organic silicon defoaming agent in a weight ratio of 5: 2.
The preparation process of the foam mask comprises the following steps:
step A: adding wollastonite, iodopropynyl butylcarbamate, a polymer of propylene oxide and ethylene oxide, emulsifying wax, a defoaming agent and color paste into water according to the parts by weight, and mixing and stirring for 60min to obtain a prepolymer A;
and B: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 60min to obtain prepolymer B;
and C: uniformly mixing the prepolymer A prepared in the step A and the prepolymer B prepared in the step B in a weight ratio of 5:2, injecting the mixture into a mold, controlling the temperature to be 20 ℃, and standing for 10min to prepare a foaming body;
step D: c, slicing the foaming body prepared in the step C, wherein the thickness of the sliced piece is controlled to be 2.8 mm;
step E: placing the sliced foaming body in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to obtain a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step F: e, connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21 in a hot pressing mode to obtain the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step E, the baking and drying temperature is 83 ℃, and the baking time is 30 min; in the step F, the hot-pressing pressure is 1500N, the hot-pressing temperature is 180 ℃, and the hot-pressing time is 12 s.
Example 5
This embodiment differs from embodiment 1 described above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 70: 30; each part of prepolymer B comprised 30 parts of a polymer of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) with 1, 3-diisocyanatotoluene, 70 parts of a polymer of cresyl diisocyanate with trimethylolpropane and polyethylene glycol.
The prepolymer A comprises the following raw materials in parts by weight:
the preparation process of the foam mask comprises the following steps:
step S1: adding carboxymethyl cellulose, a polymer of propylene oxide and ethylene oxide and citric acid into water according to the parts by weight, and mixing and stirring for 30min to obtain a prepolymer A;
step S2: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 30min to obtain prepolymer B;
step S3: uniformly mixing the prepolymer A prepared in the step S1 and the prepolymer B prepared in the step S2 according to the weight ratio of 3:2, then pouring the mixture on release paper, controlling the thickness of the pouring to be 2.5mm, controlling the temperature to be 13 ℃, and standing for 3min to prepare a foaming body;
step S4: placing the foaming body prepared in the step S3 in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to prepare a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step S5: connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21, which are prepared in the step S4, in a hot pressing manner to obtain a foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step S4, the baking and drying temperature is 73 ℃ and the time is 40 min; in step S5, the thermocompression bonding pressure is 800N, the thermocompression bonding temperature is 200 ℃, and the thermocompression bonding time is 10S.
Example 6
This embodiment differs from embodiment 1 described above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 66.7: 33.3; each part of prepolymer B comprised 33.3 parts of a-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) polymer with 1, 3-diisocyanatotoluene, 66.7 parts of a polymer of cresyl diisocyanate with trimethylolpropane and polyethylene glycol.
The prepolymer A comprises the following raw materials in parts by weight:
the preparation process of the foam mask comprises the following steps:
step S1: adding carboxymethyl cellulose, a polymer of propylene oxide and ethylene oxide and citric acid into water according to parts by weight, and mixing and stirring for 45min to obtain a prepolymer A;
step S2: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 45min to obtain prepolymer B;
step S3: uniformly mixing the prepolymer A prepared in the step S1 and the prepolymer B prepared in the step S2 in a weight ratio of 4:2, pouring the mixture on release paper, controlling the thickness of the poured mixture to be 2.6mm, controlling the temperature to be 15 ℃, and standing for 5min to prepare a foaming body;
step S4: placing the foaming body prepared in the step S3 in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to prepare a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step S5: connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21, which are prepared in the step S4, in a hot pressing manner to obtain a foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step S4, the baking and drying temperature is 75 ℃, and the time is 35 min; in step S5, the thermal compression pressure is 1000N, the thermal compression temperature is 180 ℃, and the thermal compression time is 8S.
Example 7
This embodiment differs from embodiment 1 described above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 60-70: 30-40; each part of prepolymer B comprised 35 parts of a polymer of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) with 1, 3-diisocyanatotoluene, 65 parts of a polymer of cresyl diisocyanate with trimethylolpropane and polyethylene glycol.
The prepolymer A comprises the following raw materials in parts by weight:
the preparation process of the foam mask comprises the following steps:
step S1: adding carboxymethyl cellulose, a polymer of propylene oxide and ethylene oxide and citric acid into water according to parts by weight, and mixing and stirring for 60min to obtain a prepolymer A;
step S2: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 60min to obtain prepolymer B;
step S3: uniformly mixing the prepolymer A prepared in the step S1 and the prepolymer B prepared in the step S2 in a weight ratio of 5:2, pouring the mixture on release paper, controlling the thickness of the poured mixture to be 2.8mm, controlling the temperature to be 18 ℃, and standing for 10min to prepare a foaming body;
step S4: placing the foaming body prepared in the step S3 in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to prepare a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step S5: connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21, which are prepared in the step S4, in a hot pressing manner to obtain a foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step S4, the baking and drying temperature is 78 ℃ and the time is 30 min; in the step S5, the thermocompression bonding pressure is 1200N, the thermocompression bonding temperature is 150 ℃, and the thermocompression bonding time is 5S.
Comparative example 1
This comparative example differs from example 3 above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 60: 40; each part of prepolymer B comprised 32 parts of a polymer of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene, 68 parts of diphenylmethane diisocyanate.
The preparation process of the foam mask comprises the following steps:
step A: adding wollastonite, iodopropynyl butylcarbamate, a polymer of propylene oxide and ethylene oxide, emulsifying wax, a defoaming agent and color paste into water according to the parts by weight, and mixing and stirring for 45min to obtain a prepolymer A;
and B: mixing alpha-hydrogen-omega-hydroxy poly (oxy-1, 2-ethylene) with a polymer of 1, 3-diisocyanatotoluene and diphenylmethane diisocyanate according to the parts by weight, and stirring for 45min to prepare a prepolymer B;
and C: uniformly mixing the prepolymer A prepared in the step A and the prepolymer B prepared in the step B according to the weight ratio of 4:2, then injecting the mixture into a mold, controlling the temperature to be 18 ℃, and standing for 5min to prepare a foaming body;
step D: c, slicing the foaming body prepared in the step C, wherein the thickness of the sliced sheet is controlled to be 2.6 mm;
step E: placing the sliced foaming body in microwave equipment for baking and drying, wherein the baking temperature is 73-78 ℃, the baking time is 30-40min, the water content of the foaming body is controlled to be less than 3%, and then cutting and forming are carried out to obtain a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step F: e, connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21 in a hot pressing mode to obtain the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step E, the baking and drying temperature is 78 ℃, and the baking time is 38 min; in the step F, the hot-pressing pressure is 1200N, the hot-pressing temperature is 200 ℃, and the hot-pressing time is 10 s.
Comparative example 2
This comparative example differs from example 6 above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 66.7: 33.3; each part of prepolymer B comprised 33.3 parts of a-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene polymer, 66.7 parts of diphenylmethane diisocyanate.
The preparation process of the foam mask comprises the following steps:
step S1: adding carboxymethyl cellulose, a polymer of propylene oxide and ethylene oxide and citric acid into water according to parts by weight, and mixing and stirring for 45min to obtain a prepolymer A;
step S2: mixing alpha-hydrogen-omega-hydroxy poly (oxy-1, 2-ethylene) with a polymer of 1, 3-diisocyanatotoluene and diphenylmethane diisocyanate according to the parts by weight, and stirring for 45min to prepare a prepolymer B;
step S3: uniformly mixing the prepolymer A prepared in the step S1 and the prepolymer B prepared in the step S2 in a weight ratio of 4:2, pouring the mixture on release paper, controlling the thickness of the poured mixture to be 2.6mm, controlling the temperature to be 15 ℃, and standing for 5min to prepare a foaming body;
step S4: placing the foaming body prepared in the step S3 in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to prepare a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step S5: connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21, which are prepared in the step S4, in a hot pressing manner to obtain a foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step S4, the baking and drying temperature is 75 ℃, and the time is 35 min; in step S5, the thermal compression pressure is 1000N, the thermal compression temperature is 180 ℃, and the thermal compression time is 8S.
Comparative example 3
This comparative example differs from example 3 above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 60: 40; the prepolymer B is a polymer of toluene diisocyanate, trimethylolpropane and polyethylene glycol.
The preparation process of the foam mask comprises the following steps:
step A: adding wollastonite, iodopropynyl butylcarbamate, a polymer of propylene oxide and ethylene oxide, emulsifying wax, a defoaming agent and color paste into water according to the parts by weight, and mixing and stirring for 45min to obtain a prepolymer A;
and B: according to the parts by weight, the prepolymer A prepared in the step B and the step A is prepared by mixing the prepolymer A prepared in the step B and the prepolymer A in a weight ratio of 2:4, uniformly mixing, injecting into a mold, controlling the temperature to be 18 ℃, standing for 5min, and preparing a foaming body;
and C: b, slicing the foaming body prepared in the step B, wherein the thickness of the sliced sheet is controlled to be 2.6 mm;
step D: placing the sliced foaming body in microwave equipment for baking and drying, wherein the baking temperature is 73-78 ℃, the baking time is 30-40min, the water content of the foaming body is controlled to be less than 3%, and then cutting and forming are carried out to obtain a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step E: e, connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21 in a hot pressing mode to obtain the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step D, the baking and drying temperature is 78 ℃, and the baking time is 38 min; in the step F, the hot-pressing pressure is 1200N, the hot-pressing temperature is 200 ℃, and the hot-pressing time is 10 s.
Comparative example 4
This comparative example differs from example 6 above in that:
the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 66.7: 33.3; the prepolymer B is a polymer of toluene diisocyanate, trimethylolpropane and polyethylene glycol.
The preparation process of the foam mask comprises the following steps:
step S1: adding carboxymethyl cellulose, a polymer of propylene oxide and ethylene oxide and citric acid into water according to parts by weight, and mixing and stirring for 45min to obtain a prepolymer A;
step S2: uniformly mixing the prepolymer B and the prepolymer A prepared in the step S1 according to the weight part ratio of 2:4, then pouring the mixture on release paper, controlling the thickness of the pouring to be 2.6mm, controlling the temperature to be 15 ℃, and standing for 5min to prepare a foaming body;
step S3: placing the foaming body prepared in the step S2 in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to prepare a first veneering piece 1 with a first ear hanging hole 11 and a second veneering piece 2 with a second ear hanging hole 21;
step S4: connecting the end of the first veneering piece 1 far away from the first ear hanging hole 11 and the end of the second veneering piece 2 far away from the second ear hanging hole 21, which are prepared in the step S3, in a hot pressing manner to obtain a foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
In the step S3, the baking and drying temperature is 75 ℃, and the time is 35 min; in step S5, the thermal compression pressure is 1000N, the thermal compression temperature is 180 ℃, and the thermal compression time is 8S.
The air permeability, tear resistance, resilience and compression set of the products prepared in examples 2 to 4 and comparative examples 1 and 3 were measured, respectively, and the results are shown below:
in addition, the air permeability, tear resistance, resilience and compression set of the products prepared in examples 5 to 7 and comparative examples 2 and 4 were measured, respectively, and the results are shown below:
the air permeability test adopts the standard of QB/T2411-1998 rigid foam plastic water vapor transmission performance to measure the water vapor transmission rate of the foam mask, wherein the test environment is (23 +/-1) DEG C, the relative humidity gradient is 0-85% (+/-2%), and the water vapor pressure difference between two surfaces of the test sample is delta P which is 2.39 kPa.
The tearing resistance test adopts the standard of GB 10808-1989 soft foam tearing performance test method to measure the tearing strength of the foam mask. The resilience test is carried out by adopting the standard GB/T6670-1997 determination of the resilience performance of the flexible polyurethane foam.
The compression set test adopts the standard of GB/T6669-1986 determination of compression set of soft foam polymer material to determine the compression set performance of the foam mask, wherein the test environment is (27 +/-2) DEG C, and the relative humidity is 65% +/-5%.
As can be seen from the above test results, in comparative examples 3 and 4, compared to the present invention, the use of the same amount of diphenylmethane diisocyanate in prepolymer B instead of the polymer of toluene diisocyanate with trimethylolpropane and polyethylene glycol resulted in foam mask products having reduced air permeability, tear resistance, resilience and compression set; while comparative examples 5 and 6 are directed to the present invention, the use of equal amounts of polymers of toluene diisocyanate, trimethylolpropane and polyethylene glycol instead of polymers of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene in prepolymer B, i.e., prepolymer B is a single mass of polymers of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene, results in a foam mask product with reduced air permeability, tear resistance, resiliency and compression set. The comparison of the performances of the above comparative examples 3 to 6 shows that the foam mask prepared by compounding the polymer of tolylene diisocyanate, trimethylolpropane and polyethylene glycol + the polymer of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene of the present invention as prepolymer B, and mixing the prepolymer B with the water of prepolymer A for reaction and foaming is soft, skin-friendly and comfortable, and the foam mask has uniform and fine foaming pore size and good air permeability.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.

Claims (10)

1. A foam mask is characterized in that: the adhesive tape comprises a first veneering piece and a second veneering piece which are symmetrically arranged, wherein the inner end of the first veneering piece is connected with the inner end of the second veneering piece in a pressing mode to form a pressing connection seam, a first ear hanging hole is formed in the outer end of the first veneering piece, and a second ear hanging hole is formed in the outer end of the second veneering piece; the first veneering piece and the second veneering piece are both formed by hot-pressing hydrophilic polyurethane materials.
2. The foam mask according to claim 1, wherein: the upper part of the pressing end of the first veneering piece is provided with a first ventilating part, and the lower part of the pressing end of the first veneering piece is provided with a second ventilating part; and a third ventilation part is arranged at the upper part of the pressing end of the second veneering piece, and a fourth ventilation part is arranged at the lower part of the pressing end of the second veneering piece.
3. The foam mask according to claim 1, wherein: the thickness of the first veneering piece and the thickness of the second veneering piece are both 1.8-2.2mm, and the thickness of the first ventilation part, the thickness of the second ventilation part, the thickness of the third ventilation part and the thickness of the fourth ventilation part are all 0.1-0.2 mm.
4. The foam mask according to claim 1, wherein: the hydrophilic polyurethane material is a mixture of prepolymer A and prepolymer B in a weight ratio of 60-70: 30-40; each part of prepolymer B comprises 30-35 parts of a polymer of alpha-hydro-omega-hydroxypoly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene, 65-70 parts of a polymer of cresyl diisocyanate, trimethylolpropane and polyethylene glycol.
5. The foam mask according to claim 4, wherein: the prepolymer A comprises the following raw materials in parts by weight:
the defoaming agent is a mixture of polydimethylsiloxane and an organic silicon defoaming agent in a weight ratio of 3-5: 2.
6. The foam mask according to claim 4, wherein: the prepolymer A comprises the following raw materials in parts by weight:
7. a process for preparing a foam mask according to any one of claims 1 to 5, wherein: the method comprises the following steps:
step A: adding wollastonite, iodopropynyl butylcarbamate, a polymer of propylene oxide and ethylene oxide, emulsifying wax, a defoaming agent and color paste into water according to the parts by weight, and mixing and stirring for 30-60min to obtain a prepolymer A;
and B: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 30-60min to prepare prepolymer B;
and C: uniformly mixing the prepolymer A prepared in the step A and the prepolymer B prepared in the step B according to the weight ratio of 3-5:2, then injecting the mixture into a mold, controlling the temperature to be 15-20 ℃, and standing for 3-10min to prepare a foaming body;
step D: c, slicing the foaming body prepared in the step C, wherein the thickness of the sliced sheet is controlled to be 2.5-2.8 mm;
step E: placing the sliced foaming body in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to obtain a first veneering piece with a first ear hanging hole and a second veneering piece with a second ear hanging hole;
step F: e, connecting the end of the first veneering piece far away from the first ear hanging hole and the end of the second veneering piece far away from the second ear hanging hole in a hot pressing mode to obtain the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
8. The process for preparing a foam mask according to claim 7, wherein the process comprises the following steps: in the step E, the baking and drying temperature is 75-83 ℃, and the time is 30-45 min; in the step F, the thermal compression pressure is 800-.
9. A process for making a foam mask according to any one of claims 1-4 and 6, wherein: the method comprises the following steps:
step S1: adding carboxymethyl cellulose, a polymer of propylene oxide and ethylene oxide and citric acid into water according to parts by weight, and mixing and stirring for 30-60min to obtain a prepolymer A;
step S2: mixing the polymer of alpha-hydro-omega-hydroxy poly (oxy-1, 2-ethylene) and 1, 3-diisocyanatotoluene and the polymer of diphenyl diisocyanate, trimethylolpropane and polyethylene glycol according to the parts by weight, and stirring for 30-60min to prepare prepolymer B;
step S3: uniformly mixing the prepolymer A prepared in the step S1 and the prepolymer B prepared in the step S2 according to the weight ratio of 3-5:2, then pouring the mixture on release paper, controlling the thickness of the pouring to be 2.5-2.8mm, controlling the temperature to be 13-18 ℃, and standing for 3-10min to prepare a foaming body;
step S4: placing the foaming body prepared in the step S3 in microwave equipment for baking and drying, controlling the water content of the foaming body to be less than 4%, and then cutting and molding to prepare a first veneering piece with a first ear hanging hole and a second veneering piece with a second ear hanging hole;
step S5: connecting the end of the first veneering piece far away from the first ear hanging hole and the end of the second veneering piece far away from the second ear hanging hole, which are prepared in the step S4, in a hot pressing manner to prepare the foam mask; and finally, performing sterile disinfection treatment on the foam mask and packaging.
10. The process for preparing a foam mask according to claim 9, wherein the process comprises the following steps: in the step S4, the baking and drying temperature is 73-78 ℃, and the time is 30-40 min; in the step S5, the thermal compression pressure is 800-.
CN201910894406.1A 2019-09-20 2019-09-20 Foam mask and preparation process thereof Pending CN110604352A (en)

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CN205233539U (en) * 2015-12-16 2016-05-18 深圳市波米科技有限公司 Anion electron gauze mask with elasticity
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Application publication date: 20191224