CN114687057B - Flash evaporation sheet and application thereof - Google Patents

Flash evaporation sheet and application thereof Download PDF

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Publication number
CN114687057B
CN114687057B CN202111185022.6A CN202111185022A CN114687057B CN 114687057 B CN114687057 B CN 114687057B CN 202111185022 A CN202111185022 A CN 202111185022A CN 114687057 B CN114687057 B CN 114687057B
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sheet
flash
antimony trioxide
bending length
flash evaporation
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CN114687057A (en
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叶孔萌
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Jiangsu Qingyun New Material Technology Co ltd
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Jiangsu Qingyun New Materials Co ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/558—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in combination with mechanical or physical treatments other than embossing
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/724—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged forming webs during fibre formation, e.g. flash-spinning

Abstract

The invention relates to a flash evaporation sheet and application thereof, which is characterized in that the flash evaporation sheet is prepared from polyethylene and a modifier; the attenuation value delta C of the bending length of the flash evaporation sheet is 0.1-0.4; Δc=1-C2/C1; c1 is the bending length of the flash sheet without aging treatment; c2 is the bending length of the flash evaporation sheet after aging treatment; the bending length C2 of the flash evaporation sheet after the aging treatment is 4-10 cm. The flash evaporation sheet has the advantages that the brightness is kept, the bending length of the flash evaporation sheet is reduced, the service life of a product can be prolonged, and the application range is enlarged.

Description

Flash evaporation sheet and application thereof
[ field of technology ]
The invention relates to the technical field of flash evaporation polyethylene, in particular to a flash evaporation sheet and application thereof.
[ background Art ]
Flash spinning (flash spinning) is a spinning method in which a polymer solution is extruded through a spinneret plate under high pressure while being above the boiling point of a solvent, thereby achieving normal pressure. During spinning, the solvent evaporates rapidly due to the sudden pressure drop, and extremely fine filaments are ejected. The most prominent phenomenon of flash spinning is phase separation, such as the conversion of polymer and solvent into homogeneous solution by stirring at high temperature and high pressure during dissolution; in the low pressure chamber, slightly reducing the pressure to enable the solution to undergo phase separation to a certain extent to form a two-liquid-phase solution, wherein one phase is a polymer-rich phase and the other phase is a solvent-rich phase; finally, when the solution enters the air at normal temperature and normal pressure through the spinneret holes, the solvent is converted into steam to be rapidly separated from the polymer. For flash spinning, in dupont's U.S. patent No. 3081519, a flash spinning process is described in which a liquid spin agent solution of a polymer (which is not a solvent for the polymer at below the nominal boiling point of the liquid) is spun into a region of lower temperature and significantly lower pressure at a temperature above the nominal boiling point of the liquid and at autogenous pressure or greater to produce plexifilamentary film-fibril strands. In U.S. patent 3227794 to dupont, the method disclosed in US3081519 is used to best obtain a yarn from the silk film-fibril strands when the pressure of the polymer and the spin agent solution is slightly reduced in a reduced pressure chamber immediately prior to flash spinning.
At present, the aging phenomenon of the existing flash evaporation product is obvious after the existing flash evaporation product is used for a period of time, particularly in high-temperature and high-humidity environments, and the flash evaporation product is a new flash evaporation sheet product developed by improving raw materials and processes aiming at the technical problems of obvious brightness reduction and bending length reduction caused by the obvious aging phenomenon.
[ invention ]
The invention aims to overcome the defects of the prior art and provides a flash evaporation sheet and application thereof.
The aim of the invention is realized by the following technical scheme:
a flash-evaporated sheet, the feedstock of the flash-evaporated sheet comprising polyethylene; the attenuation value delta C of the bending length of the flash evaporation sheet is 0.1-0.4; the D65 fluorescence brightness attenuation value delta F of the flash evaporation sheet is 0.05-0.15;
△C＝1-C2/C1；
c1 is the bending length of the flash sheet without aging treatment, in centimeters;
c2 is the bending length of the flash evaporation sheet after aging treatment, and the unit cm;
the bending length C2 of the flash evaporation sheet after aging treatment is 4-10 cm;
△F＝1-F2/F1
f1 is D65 fluorescence brightness of the flash sheet without aging treatment;
f2 is the D65 fluorescence brightness of the flash evaporation sheet after aging treatment;
the aging treatment process conditions are as follows: irradiance of 60 + -2 w/m in the wavelength range of 300-400 nm 2 The black standard temperature is 65+/-2 ℃, the air temperature of the test bin is 38+/-3 ℃, the relative humidity is 50+/-10%, and the drying time is 168 hours.
The bending length C2 of the flash evaporation sheet after the aging treatment is 4-5 cm.
The bending length C2 of the flash evaporation sheet after the aging treatment is 5-6 cm.
The bending length C2 of the flash evaporation sheet after the aging treatment is 6-7 cm.
The bending length C2 of the flash evaporation sheet after the aging treatment is 7-8 cm.
The bending length C2 of the flash evaporation sheet after the aging treatment is 8-9 cm.
The bending length C2 of the flash evaporation sheet after the aging treatment is 9-10 cm.
The attenuation value DeltaC of the bending length of the flash-off sheet is 0.1-0.2.
The attenuation value DeltaC of the bending length of the flash-off sheet is 0.2-0.3.
The attenuation value DeltaC of the bending length of the flash-off sheet is 0.3-0.4.
The D65 fluorescence brightness attenuation value DeltaF of the flash sheet is 0.05-0.1.
The D65 fluorescence brightness attenuation value DeltaF of the flash sheet is 0.1-0.15.
A flash-evaporated sheet, the feedstock of the flash-evaporated sheet further comprising a modifier.
The mass fraction of the modifier in the raw material of the flash evaporation sheet is 0.05-0.4%.
The modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The melting point of the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 160-180 ℃, is higher than the flash spinning temperature, is easy to dissolve in organic solvents such as toluene, methylene dichloride and the like, and has good compatibility with the solvent of flash spinning; meanwhile, the degradation of the polyethylene is reduced in the processing process of the polyethylene, and the smoke fading resistance of the polyethylene can be improved.
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 12-16%;
the polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.05-0.4%;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain antimony trioxide with magnesium oxide adsorbed on the surface; dispersing antimony trioxide with magnesium oxide adsorbed on the surface in isopropanol of diphenyl diethoxy silane, adding vinyl trimethoxy silane, treating at 45-60 ℃ for 15-25 minutes, filtering, and vacuum drying filter residues to obtain modified antimony trioxide; grinding and mixing the modified antimony trioxide and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite to obtain the modifier.
The volume ratio of isopropanol to water in the aqueous solution of isopropanol was 1:1.
The mass fraction of the antimony trioxide in the aqueous solution of isopropanol is 3-11%.
The molar ratio of the antimony trioxide to the magnesium chloride is 1:0.1-1:0.2.
The mass ratio of the antimony trioxide with the magnesium oxide adsorbed on the surface to the diphenyl diethoxysilane is 1:1-1:3.5.
The mass ratio of the isopropanol to the diphenyldiethoxysilane is 1:0.04-1:0.25.
The mass ratio of the diphenyl diethoxy silane to the vinyl trimethoxy silane is 1:1-1:1.3.
The mass ratio of the modified antimony trioxide to the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 1:1-1:1.3.
The calcination process is to rapidly raise the temperature below 300 ℃ at 20 ℃/min and slowly raise the temperature at 300-550 ℃ at 10 ℃/min.
Antimony trioxide is used as a common brightening agent and mainly plays a role in physical brightening, but is used as an inorganic material, has poor dispersibility in a matrix, affects the strength of the matrix and also causes poor brightening effect; the existing conventional method mainly adopts a coupling agent to modify the brightening agent to improve the compatibility with a matrix, but the brightening agent is inevitably degraded due to the introduction of organic components, particularly silicon-containing materials; the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is used as an organic antioxidant, has the main function of antioxidation, and realizes the antioxidation effect by utilizing a group on a conjugated structure through a large conjugated structure in molecules, but has weak bonding force with a matrix, so that the strong loss on the matrix is large. According to the preparation method, diphenyl diethoxy silane is used as a coupling agent, and in order to have certain binding force with a matrix, the influence of a silicon-containing material on the molecules of the whitening agent is eliminated, magnesium ions with molecular chelation are introduced into the preparation process of the whitening agent, and the magnesium ions are introduced into the surface of the whitening agent, so that the influence of the coupling agent on the whitening agent is eliminated; meanwhile, the benzene ring structure introduced into the molecule of the whitening agent can be used as a large conjugated structure to have affinity with the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite, so that the problem of weak binding force between the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite and a matrix is avoided, the influence of the introduction of the whitening agent on the strength of the matrix is ensured, and meanwhile, the introduction of the coupling agent containing the benzene ring structure can play a role of synergistic whitening with the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite, and the damage to the matrix material caused by a single whitening agent or an antioxidant is avoided.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 160-220 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 105-125 ℃.
The application of the flash evaporation sheet comprises the composite material of the flash evaporation sheet, wherein the composite material is clothing, fabric and the like.
Compared with the prior art, the invention has the following positive effects:
the flash evaporation sheet has the advantages that the brightness is kept, the bending length of the flash evaporation sheet is reduced, the service life of a product can be prolonged, and the application range is enlarged.
[ detailed description ] of the invention
Specific embodiments of a flash evaporation sheet and its application according to the present invention are provided below.
1. Bending length
The bending length of the fabric is one of characteristic indexes for representing the bending deformation resistance of the fabric, reflects the stiffness degree of the fabric, and a method for measuring the stiffness of the fabric at home and abroad is generally a slope method. Sampling tests were carried out by means of a bending length meter according to GB/T18318-2001 (determination of the bending length of textile fabrics) according to this national standard, the specific detailed test procedure being described internationally, a brief description of which is given here: the method comprises the steps that 12 samples are made from samples, the long sides of the 6 samples are parallel to the processing direction of the fabric, and the long sides of the 6 samples are perpendicular to the processing direction of the fabric; the test was performed separately in two groups. The specific test process is as follows: a rectangular sample in a certain group of samples is prevented from being on a horizontal platform, the long axis of the sample is parallel to the long axis of the platform, the sample is pushed along the long axis direction of the platform, the sample is enabled to extend the platform and bend under the dead weight, the extending part is suspended, and the other end of the platform is pressed by a ruler. When the head end of the sample passes through the front edge of the platform and reaches the inclined plane with an inclination angle of 41.5 degrees with the horizontal line, the extension length is 2 times of the bending length of the sample, so that the bending length of one direction is calculated, the other end and the two ends of the other surface are replaced, the four bending lengths of the rectangular sample are respectively tested, then the steps are repeated, the rest 5 samples are tested, and the measured bending lengths are averaged to obtain the average bending length of the sample in one direction. Repeating the above steps, continuing to test another group of samples, and measuring the average bending length in the other direction. The average bending lengths in the two directions are again averaged to obtain the bending length of the sample.
2. Aging treatment
The aging treatment process conditions are as follows: irradiance of 60 + -2 w/m in the wavelength range of 300-400 nm 2 The black standard temperature is 65+/-2 ℃, the air temperature of the test bin is 38+/-3 ℃, the relative humidity is 50+/-10%, and the drying time is 168 hours.
3. D65 fluorescent brightness
Whiteness is the degree of whiteness from ideal, and also the degree of whiteness of the surface of a substance, expressed as a percentage of the white content. Brightness testing is specifically seen in GBT 7974-2013 paper, paperboardAnd the brightness of the blue diffuse reflection factor D65 of the paper pulp, and testing according to the method of paper and paperboard to obtain the D on the front surface of the sample 65 Fluorescent brightness of F Positive direction The D65 fluorescence brightness of the back of the sample is measured to be F Back of body Again, this definition: d65 fluorescence brightness f= (F) of sample Positive direction +F Back of body )/2. D65 refers to fluorescence excited with a D65 light source, about ISO2470-1.
Example 1
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 12%;
the solvent is a mixture of monochlorodichloromethane, 1, 2-dichloro-1, 2-trifluoroethane, 1H-perfluorohexane and 1, 1-difluoroethane, and the mass ratio of the solvent to the solvent is 5:3:1:1.
The polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.05%;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain antimony trioxide with magnesium oxide adsorbed on the surface; dispersing antimony trioxide with magnesium oxide adsorbed on the surface in isopropanol of diphenyl diethoxy silane, adding vinyl trimethoxy silane, treating at 45-60 ℃ for 15-25 minutes, filtering, and vacuum drying filter residues to obtain modified antimony trioxide; grinding and mixing the modified antimony trioxide and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite to obtain the modifier.
The volume ratio of isopropanol to water in the aqueous solution of isopropanol was 1:1.
The mass fraction of antimony trioxide in the aqueous solution of isopropanol was 3%.
The molar ratio of antimony trioxide to magnesium chloride was 1:0.1.
The mass ratio of the antimony trioxide with the magnesium oxide adsorbed on the surface to the diphenyl diethoxysilane is 1:1.
The mass ratio of the isopropanol to the diphenyldiethoxysilane is 1:0.04.
The mass ratio of diphenyldiethoxysilane to vinyltrimethoxysilane is 1:1.
The mass ratio of the modified antimony trioxide to the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 1:1.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 165 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 105 ℃. Samples were subjected to aging treatment, and the bending length before and after aging and the D65 fluorescence brightness were respectively tested, and specific test data are shown in table 1.
Example 2
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 12.5%;
the solvent is a mixture of monochlorodichloromethane, 1, 2-dichloro-1, 2-trifluoroethane, 1H-perfluorohexane and 1, 1-difluoroethane, and the mass ratio of the solvent to the solvent is 5:3:1:1.
The polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.1%;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain antimony trioxide with magnesium oxide adsorbed on the surface; dispersing antimony trioxide with magnesium oxide adsorbed on the surface in isopropanol of diphenyl diethoxy silane, adding vinyl trimethoxy silane, treating at 45-60 ℃ for 15-25 minutes, filtering, and vacuum drying filter residues to obtain modified antimony trioxide; grinding and mixing the modified antimony trioxide and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite to obtain the modifier.
The volume ratio of isopropanol to water in the aqueous solution of isopropanol was 1:1.
The mass fraction of antimony trioxide in the aqueous solution of isopropanol was 5%.
The molar ratio of antimony trioxide to magnesium chloride was 1:0.13.
The mass ratio of the antimony trioxide with the magnesium oxide adsorbed on the surface to the diphenyl diethoxysilane is 1:1.5.
The mass ratio of the isopropanol to the diphenyldiethoxysilane is 1:0.1.
The mass ratio of diphenyldiethoxysilane to vinyltrimethoxysilane was 1:1.15.
The mass ratio of the modified antimony trioxide to the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 1:1.15.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 175 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 110 ℃. Samples were subjected to aging treatment, and the bending length before and after aging and the D65 fluorescence brightness were respectively tested, and specific test data are shown in table 1.
Example 3
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 13%;
the solvent is a mixture of monochlorodichloromethane, 1, 2-dichloro-1, 2-trifluoroethane, 1H-perfluorohexane and 1, 1-difluoroethane, and the mass ratio of the solvent to the solvent is 5:3:1:1.
The polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.2%;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain antimony trioxide with magnesium oxide adsorbed on the surface; dispersing antimony trioxide with magnesium oxide adsorbed on the surface in isopropanol of diphenyl diethoxy silane, adding vinyl trimethoxy silane, treating at 45-60 ℃ for 15-25 minutes, filtering, and vacuum drying filter residues to obtain modified antimony trioxide; grinding and mixing the modified antimony trioxide and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite to obtain the modifier.
The volume ratio of isopropanol to water in the aqueous solution of isopropanol was 1:1.
The mass fraction of antimony trioxide in the aqueous solution of isopropanol was 6%.
The molar ratio of antimony trioxide to magnesium chloride was 1:0.15.
The mass ratio of the antimony trioxide with the magnesium oxide adsorbed on the surface to the diphenyl diethoxysilane is 1:2.
The mass ratio of the isopropanol to the diphenyldiethoxysilane is 1:0.15.
The mass ratio of diphenyldiethoxysilane to vinyltrimethoxysilane was 1:1.2.
The mass ratio of the modified antimony trioxide to the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 1:1.2.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 195 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 115 ℃. Samples were subjected to aging treatment, and the bending length before and after aging and the D65 fluorescence brightness were respectively tested, and specific test data are shown in table 1.
Example 4
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 13.5%;
the solvent is a mixture of monochlorodichloromethane, 1, 2-dichloro-1, 2-trifluoroethane, 1H-perfluorohexane and 1, 1-difluoroethane, and the mass ratio of the solvent to the solvent is 5:3:1:1.
The polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.3%;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain antimony trioxide with magnesium oxide adsorbed on the surface; dispersing antimony trioxide with magnesium oxide adsorbed on the surface in an aqueous solution of isopropanol of diphenyl diethoxy silane, adding vinyl trimethoxy silane, treating at 45-60 ℃ for 15-25 minutes, filtering, and vacuum drying filter residues to obtain modified antimony trioxide; grinding and mixing the modified antimony trioxide and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite to obtain the modifier.
The volume ratio of isopropanol to water in the aqueous solution of isopropanol was 1:1.
The mass fraction of antimony trioxide in the aqueous solution of isopropanol was 9%.
The molar ratio of antimony trioxide to magnesium chloride was 1:0.15.
The mass ratio of the antimony trioxide with the magnesium oxide adsorbed on the surface to the diphenyl diethoxysilane is 1:3.
The mass ratio of the isopropanol to the diphenyldiethoxysilane is 1:0.2.
The mass ratio of diphenyldiethoxysilane to vinyltrimethoxysilane was 1:1.25.
The mass ratio of the modified antimony trioxide to the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 1:1.25.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 205 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 120 ℃. Samples were subjected to aging treatment, and the bending length before and after aging and the D65 fluorescence brightness were respectively tested, and specific test data are shown in table 1.
Example 5
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 14%;
the solvent is a mixture of monochlorodichloromethane, 1, 2-dichloro-1, 2-trifluoroethane, 1H-perfluorohexane and 1, 1-difluoroethane, and the mass ratio of the solvent to the solvent is 5:3:1:1.
The polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.4%;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain surface-adsorbed magnesium oxide; dispersing magnesium oxide adsorbed on the surface into isopropanol of diphenyl diethoxy silane, adding vinyl trimethoxy silane, treating at 45-60 ℃ for 15-25 minutes, filtering, and vacuum drying filter residues to obtain modified antimonous oxide; grinding and mixing the modified antimony trioxide and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite to obtain the modifier.
The volume ratio of isopropanol to water in the aqueous solution of isopropanol was 1:1.
The mass fraction of antimony trioxide in the aqueous solution of isopropanol was 11%.
The molar ratio of antimony trioxide to magnesium chloride was 1:0.2.
The mass ratio of the antimony trioxide with the magnesium oxide adsorbed on the surface to the diphenyl diethoxysilane is 1:3.5.
The mass ratio of the isopropanol to the diphenyldiethoxysilane is 1:0.25.
The mass ratio of diphenyldiethoxysilane to vinyltrimethoxysilane was 1:1.3.
The mass ratio of the modified antimony trioxide to the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 1:1.3.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 220 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 125 ℃. Samples were subjected to aging treatment, and the bending length before and after aging and the D65 fluorescence brightness were respectively tested, and specific test data are shown in table 1.
Comparative example 1
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 13%;
the solvent is a mixture of monochlorodichloromethane, 1, 2-dichloro-1, 2-trifluoroethane, 1H-perfluorohexane and 1, 1-difluoroethane, and the mass ratio of the solvent to the solvent is 5:3:1:1.
The polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.2%;
the modifier is a mixture of magnesium oxide, antimony trioxide and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The molar ratio of antimony trioxide to magnesium oxide was 1:0.15.
The mass ratio of the antimony trioxide to the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 1:1.2.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 195 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 115 ℃. Samples were subjected to aging treatment, and the bending length before and after aging and the D65 fluorescence brightness were respectively tested, and specific test data are shown in table 1.
Comparative example 2
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 13%;
the solvent is a mixture of monochlorodichloromethane, 1, 2-dichloro-1, 2-trifluoroethane, 1H-perfluorohexane and 1, 1-difluoroethane, and the mass ratio of the solvent to the solvent is 5:3:1:1.
The polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.2%;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain antimony trioxide with magnesium oxide adsorbed on the surface; grinding and mixing antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite to obtain the modifier.
The volume ratio of isopropanol to water in the aqueous solution of isopropanol was 1:1.
The mass fraction of antimony trioxide in the aqueous solution of isopropanol was 6%.
The molar ratio of antimony trioxide to magnesium chloride was 1:0.15.
The mass ratio of the antimony trioxide with the magnesium oxide adsorbed on the surface to the bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite is 1:1.2.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 195 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 115 ℃. Samples were subjected to aging treatment, and the bending length before and after aging and the D65 fluorescence brightness were respectively tested, and specific test data are shown in table 1.
Comparative example 3
A method for preparing a flash evaporation sheet, comprising the following specific steps:
step one: preparing spinning solution, adding a solvent into a reaction kettle, adding a polymer into the solvent, and dissolving to obtain spinning solution;
the mass fraction of the polymer in the spinning solution is 13%;
the solvent is a mixture of monochlorodichloromethane, 1, 2-dichloro-1, 2-trifluoroethane, 1H-perfluorohexane and 1, 1-difluoroethane, and the mass ratio of the solvent to the solvent is 5:3:1:1.
The polymer comprises polyethylene and a modifier;
the mass fraction of the modifier in the polymer is 0.2%;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain the antimony trioxide with the surface adsorbed with magnesium oxide.
The volume ratio of isopropanol to water in the aqueous solution of isopropanol was 1:1.
The mass fraction of antimony trioxide in the aqueous solution of isopropanol was 6%.
The molar ratio of antimony trioxide to magnesium chloride was 1:0.15.
Step two: spinning, namely spinning the spinning solution obtained in the step one by a flash evaporation method, wherein the spinning temperature is 195 ℃, obtaining flash evaporation fiber, and performing hot press molding to obtain flash evaporation non-woven fabric, wherein the hot press temperature is 115 ℃. Samples were subjected to aging treatment, and the bending length before and after aging and the D65 fluorescence brightness were respectively tested, and specific test data are shown in table 1.
TABLE 1
C2(cm) C1(cm) △C △F
Example 1 4.2 6.5 0.354 0.143
Example 2 5.5 7.4 0.257 0.135
Example 3 6.8 8.6 0.209 0.129
Example 4 7.5 9.3 0.194 0.123
Example 5 8.5 9.9 0.141 0.089
Comparative example 1 2.7 4.9 0.44 0.42
Comparative example 2 5.5 6.9 0.20 0.33
Comparative example 3 5.1 6.6 0.22 0.38
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present invention, and are intended to be within the scope of the present invention.

Claims (11)

1. A flash vaporization sheet, characterized in that the feedstock of the flash vaporization sheet comprises polyethylene; the attenuation value delta C of the bending length of the flash evaporation sheet is 0.1-0.4; the D65 fluorescence brightness attenuation value delta F of the flash evaporation sheet is 0.05-0.15;
△C=1-C2/C1；
c1 is the bending length of the flash sheet without aging treatment;
c2 is the bending length of the flash evaporation sheet after aging treatment;
the bending length C2 of the flash evaporation sheet after aging treatment is 4-10 cm;
△F=1-F2/F1；
f1 is D65 fluorescence brightness of the flash sheet without aging treatment;
f2 is the D65 fluorescence brightness of the flash evaporation sheet after aging treatment;
the aging treatment process conditions are as follows: irradiance of 60+ -2 w/m in the wavelength range of 300-400 nm 2 The black standard temperature is 65+/-2 ℃, the air temperature of the test bin is 38+/-3 ℃, the relative humidity is 50+/-10%, and the drying time is 168 hours;
the feedstock to flash sheet further comprises a modifier;
the modifier is a compound of antimony trioxide with magnesium oxide adsorbed on the surface and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite;
the preparation method of the modifier comprises the following specific steps:
adding antimony trioxide into an aqueous solution of isopropanol, adding a magnesium chloride solution, adsorbing on the surface of the antimony trioxide to generate magnesium hydroxide precipitate, filtering, drying, and calcining to obtain antimony trioxide with magnesium oxide adsorbed on the surface; dispersing antimony trioxide with magnesium oxide adsorbed on the surface in isopropanol of diphenyl diethoxy silane, adding vinyl trimethoxy silane, treating at 45-60 ℃ for 15-25 minutes, filtering, and vacuum drying filter residues to obtain modified antimony trioxide; grinding and mixing the modified antimony trioxide and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite to obtain the modifier.
2. A flashing sheet according to claim 1, wherein the ageing treatment has a bending length C2 of 4-5 cm.
3. A flashing sheet according to claim 1, wherein the bending length C2 of the flashing sheet after ageing treatment is between 5 and 6 cm.
4. A flashing sheet according to claim 1, wherein the bending length C2 of the flashing sheet after ageing treatment is 6-7 cm.
5. A flashing sheet according to claim 1, characterised in that the attenuation value ac of the bending length of the flashing sheet is 0.1-0.2.
6. A flashing sheet according to claim 1, characterized in that the attenuation value ac of the bending length of the flashing sheet is 0.2-0.3.
7. A flashing sheet according to claim 1, characterized in that the attenuation value ac of the bending length of the flashing sheet is 0.3-0.4.
8. The flashing sheet according to claim 1, wherein the D65 fluorescence intensity of the flashing sheet has a decay value Δf of 0.05-0.1.
9. The flashing sheet according to claim 1, wherein the D65 fluorescence intensity of the flashing sheet has a decay value Δf of 0.1-0.15.
10. A flash sheet according to claim 1, wherein the feedstock of the flash sheet further comprises a modifier, and the mass fraction of modifier in the feedstock of the flash sheet is 0.05-0.4%.
11. Use of a flash-evaporated sheet according to any one of the preceding claims 1-9, characterized in that the composite material comprises a flash-evaporated sheet.
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