CN109135257A - A kind of preparation method of aqueous PU frosted gloves - Google Patents
A kind of preparation method of aqueous PU frosted gloves Download PDFInfo
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- CN109135257A CN109135257A CN201810898239.3A CN201810898239A CN109135257A CN 109135257 A CN109135257 A CN 109135257A CN 201810898239 A CN201810898239 A CN 201810898239A CN 109135257 A CN109135257 A CN 109135257A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/02—Copolymers with acrylonitrile
- C08J2409/04—Latex
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
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Abstract
The present invention relates to a kind of preparation methods of aqueous PU frosted gloves, it includes the following steps: step S1: making aqueous PU slurry: according to the mass fraction, 60~120 parts of aqueous polyurethanes, 0~40 part of NBR latex, 0.1~5 part of crosslinking agent, 0~10 part of foaming agent, 0~6 part of activating agent, 0~5 part of stabilizer, 0~6 part of thickener, 0~2 part of aqueous color paste and 0~20 part of water are mixed, aqueous PU slurry is made；Step S2: gloves embryo is impregnated into aqueous PU slurry；Step S3: spray salt treatment forms frosted in the aqueous PU slurry outer surface being not yet fully cured；Step S4: drying and aqueous desalination；Step S5: drying again, and the aqueous PU frosted gloves are made.Present invention improves over the components of aqueous PU slurry, to increase the water resistance of aqueous PU gloves finished product, and it is more suitable for carrying out the processing of frosted using spray salt mode etc., the aqueous PU frosted gloves with preferable grasping performance are made, this product is free of DMF and anaphylactogen, and wear-resisting grade EN388 can reach 4 grades.
Description
Technical field
The present invention relates to a kind of preparation methods of aqueous PU frosted gloves.
Background technique
Polyurethane material is the abbreviation of polyurethanes, and English name is polyurethane, it is a kind of macromolecule
Material, abbreviation PU.PU includes aqueous PU and oiliness PU.Oiliness PU gloves comfortable feel is soft, is bonded skin, thus is worked deeply
Person likes, but since it can remain the organic solvents such as DMF, application field is very restricted.Although aqueous PU ring
Protect, but since its water resistance and grip are all poor (surface is very smooth), slightly with water wash by rubbing with the hands it is several under be just damaged, use
Service life some even only 1 day, therefore cannot be applied well.Again because its cracky, service life are short, waste is abandoned
Situation is also more serious.
The gloves embryo of the aqueous PU impregnating slurry of existing conventional formulation, if carrying out frosted processing to increase grip
When, need to before the aqueous PU slurry of PU is not yet fully cured using spray the external impacts such as salt or sandblasting surface treatment process, and
The processing of washing desalination is carried out after frosted processing again.And the poor water resistance of the aqueous PU slurry due to existing conventional formulation, easily
It is dissolved in water.Therefore, the aqueous PU slurry of PU that these treatment processes are all easy to adhere to gloves embryo surface falls off, leaks
Glue, it is even damaged situations such as, cause finished product gloves off quality.Even if there are also it is some do not occur during spray salt leak adhesive with
It is phenomena such as damaged, but the aqueous PU frosted gloves of gained after vulcanization drying, more aqueous than smooth surface in terms of water resistance and durability
PU gloves are worse.It can be seen that the dipping gloves embryo of the aqueous PU slurry of existing conventional formulation is unsuitable for doing frosted processing.
For this purpose, the present invention wishes to improve by the formula to existing aqueous PU slurry, finished product hand is on the one hand improved
On the other hand the water resistance of set makes to improve the surface treatment that the aqueous PU impregnating slurry gloves after being formulated are adapted for frosted, from
And increase frosted processing step during preparing gloves, improve the grip of finished product gloves.
Summary of the invention
(1) technical problems to be solved
The purpose of the present invention is being improved by the formula to aqueous PU slurry, to improve the water resistance of finished product gloves；
Cooperate simultaneously using frosted technology, so that glove surface is formed frosted, make aqueous PU frosted gloves, not only can guarantee finished product gloves
Comfortable feel, additionally it is possible to improve the water resistance and grip of finished product gloves.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
A kind of preparation method of aqueous PU frosted gloves, includes the following steps:
Step S1: aqueous PU slurry is made: according to the mass fraction, by 60~120 parts of aqueous polyurethanes, 0~40 part of butyronitrile
Latex, 0.1~5 part of crosslinking agent, 0~10 part of foaming agent, 0~6 part of activating agent, 0~5 part of stabilizer, 0~6 part of thickening
Agent, 0~2 part of aqueous color paste and 0~20 part of water are mixed, and aqueous PU slurry is made；
Step S2: it impregnates aqueous PU slurry: gloves embryo being immersed in aqueous PU slurry prepared by step S1, gloves are made
Embryo surface adheres to one layer of aqueous PU slurry, obtains dipped gloves embryo；
Step S3: carrying out spray salt treatment to the dipped gloves embryo surface handled through step S2, to be not yet fully cured
Aqueous PU slurry outer surface forms frosted, obtains product among frosted gloves；
Step S4: aqueous desalination: product among the frosted gloves handled through step S3 are dried, then wash desalination；
Step S5: drying again, and the aqueous PU frosted gloves are made.
A preferred embodiment according to the present invention, the solid content of aqueous polyurethane used in step S1 are less than 50%
Mass percent, preferably 30-40% mass percent, usually based on the Raw Materials for Waterborne Polyurethane that directly buying comes
Material.Preferably, in step S1, the aqueous polyurethane is polyether type aqueous polyurethane, polyester-type aqueous polyurethane or aforementioned two
The mixture of person.
A preferred embodiment according to the present invention, in step S1, the crosslinking agent is polynary amine, polyalcohols and nitrogen
Any combination of one of third pyridine class or aforementioned items.Wherein, polynary amine can be propane diamine or MOCA；Polyalcohols can be
Polyethylene glycol, polypropylene glycol or trimethylolpropane.
A preferred embodiment according to the present invention, the solid content of the NBR latex are 40~50%, dosage is 10~
35 parts, by by it is direct buying come NBR latex raw material based on expect.
A preferred embodiment according to the present invention includes 1~6 part of hair in step S1, in the aqueous PU slurry of production
Infusion, the aqueous PU slurry of aqueous PU slurry expansion type for making step S1, coefficient of foaming are 1.1~1.6.
By control foaming agent adding proportion and blowing temperature, avoids coefficient of foaming excessive, cause the machinery of finished product gloves
Intensity wearability, service life, water resistance are affected；And the too low then pliability of coefficient of foaming is inadequate, cannot reach ideal
Usage comfort.Therefore, the aqueous PU slurry of expansion type is easy to that pliability and the preferably aqueous PU gloves of comfort level are made, without sending out
The aqueous PU slurry of bubble is easy to that the preferably aqueous PU gloves of wearability are made.
Wherein, in step S1, the foaming agent is selected from potassium oleate, neopelex, lauryl sodium sulfate
And the combination of the anionic surfactants one or more such as potassium laurate.
It is because aqueous PU is anionic emulsion, if using cation using the foaming agent of anionic surfactant
Surfactant, zwitterion reacts in lotion, causes foaming emulsion highly unstable.Therefore, anion surface active
Agent can make the aqueous PU slurry prepared more stable for cationic surfactant.
A preferred embodiment according to the present invention, in step S1, the activating agent is zinc oxide, zinc carbonate and stearic acid
The combination of one or both of zinc.Preferably, the dosage of activating agent is 0.5~5 part.
Each activating agent can be used alone, and can also be used in mixed way, and zinc oxide accounts for 80% or so when mixing, zinc stearate
20% or so or zinc carbonate 80% or so and zinc stearate 20% or so.Zinc oxide, zinc stearate, zinc carbonate isoreactivity agent
For promoting the formation of polymer molecular chain covalent bond or ionic bond, thus help to play bridging action line style is intermolecular, from
And it is mutually bonded multiple linear molecules and is cross-linked into network structure.Therefore, by the promoter effect of activating agent, the rubber of product can be made
Glue has the performances such as preferably wear-resistant and chemicals-resistant.
A preferred embodiment according to the present invention, in step S1, the stabilizer is anionic surfactant or non-
Ionic surface active agent.Preferably, stabilizing agent dosage is 0.5~4 part.When in the foaming agent of anionic surfactant, there are water
When in property PU formula of size, the dosage of stabilizer can be suitably reduced.
Since aqueous PU is anionic emulsion, anionic surfactant or non-is preferably added in the present invention in formula
Ionic surface active agent prevents decomposition, the aging of aqueous polyurethane as stabilizer.Whereby, product properties is able to maintain to stablize,
Delay product aging speed simultaneously, improves the durability of glove product.
Preferably, in step S1, the thickener is sodium carboxymethylcellulose CMC, sodium hydroxyethyl cellulose, methylol second
Base cellulose, hydroxyethylpropyl cellulose, Sodium Polyacrylate, polyacrylic acid, casein, PVAC polyvinylalcohol and polyurethane association
One or more of combinations of type thickener.Preferably, the dosage of the thickener is 0.2~5 part.
By the adjusting of thickener additive amount, the aqueous PU slurry of preparation is adjusted to suitable viscosity.Viscosity determines every
After secondary dipping sizing agent, the overall thickness of the newly-increased thickness for being stranded in the aqueous PU slurry of glove surface and product, thus in practical life
In production, aqueous PU slurry can be deployed according to the thickness of needs to required viscosity number.PU slurry aqueous for non-foamed type, due to
It is harder after the aqueous PU slurry curing of non-foamed type, therefore unsuitable thickness is excessive, need to deploy viscosity to smaller value when preparing
(1500~2500mPa.s) avoids glove surface kiss-coating after dipping sizing agent blocked up, and glove product feel is poor.
A preferred embodiment according to the present invention, in step S1, when making aqueous PU slurry, the aqueous PU slurry is pressed
Mass fraction meter includes 60~120 parts of aqueous polyurethanes, 10~35 parts of NBR latexes, 0.1~5 part of crosslinking agent, 1~6 part of hair
Infusion, 0.5~5 part of activating agent, 0.5~4 part of stabilizer, 0.2~5 part of thickener, 1~1.5 part of aqueous color paste and 0~20
Part water.
Wherein, aqueous color paste is water-soluble mill base, and selection can be selected to add as needed.
Preferably, in step S2, the gloves embryo further includes dipping coagulator before immersing in the aqueous PU slurry
Processing step, i.e., gloves embryo is warmed to 20~55 DEG C and is dipped into coagulator, then taken out, dried coagulator, then immerse
In the aqueous PU slurry.Preferably, the coagulator is in the alcoholic solution of the calcium nitrate of 2%-5%, calcium chloride, zinc chloride
Any one.
Wherein alcohol is the alcohol of liquid under the room temperature such as methanol or ethyl alcohol, is volatilized convenient for quick, otherwise subsequent immersion property PU slurry
When will appear drop wear, seep through, or decortication a series of problems, such as.Alcoholic solution is gone relative to aqueous solution more easily by the method for volatilization
It removes, when will not influence to impregnate aqueous PU slurry stage, the attachment of aqueous PU slurry.Gloves embryo impregnates the processing of coagulator,
The purpose is to cover biggish hole on embryo by coagulator closure estate agent, prevent during impregnating aqueous PU slurry, it is aqueous
PU slurry enters gloves embryo inboard and solidifies, and there is the PU glue of solidification at the position for causing gloves inboard to contact with people's skin, influences to wear
It wears.And the hole of cotton wool gloves embryo is smaller, aqueous PU slurry is not easy to penetrate into inboard, does not need to carry out dipping solidification in advance
The processing of agent.
Preferably, it in step S2, after the gloves embryo immerses the aqueous PU slurry, is taken from the aqueous PU slurry
Out, spin coating is handled 15~120 seconds.The process of spin coating is usually taken out gloves embryo from the aqueous PU slurry, to gloves embryo
The aqueous PU slurry of excess surface slides naturally due to gravity, and residual titration is into the slot for containing the aqueous PU slurry.
Preferably, in step S3, the salt that the spray salt treatment uses is 60 mesh~100 mesh, and the salt is sodium sulphate or chlorine
Change the salt-mixture of sodium or aforementioned two kinds of salt.
Preferably, in step S4, the temperature dried to product among the frosted gloves is 70~110 DEG C, and the time is
30~90min carries out first time drying under the lower drying temperature, can avoid aqueous PU slurry and be heated too strong and occur
Bubbling phenomenon.
Preferably, in step S5, it is 60~90min that drying temperature, which is 80~120 DEG C of times,.
(3) beneficial effect
The beneficial effects of the present invention are:
(1) crosslinking agent that the present invention is added by the formula in aqueous PU slurry, and crosslinking agent is made to be maintained at proper proportion,
So that active group such as carboxyl on aqueous polyurethane etc. is generated crosslinked action each other, it is more aqueous than what is be not crosslinked to form structure
The more stable network structure of PU molecular resin, to increase the water resistance of aqueous PU gloves finished product.
(2) present invention is by being further added a certain amount of NBR latex, due to butyronitrile in the formula of aqueous PU slurry
Also contain carboxyl isoreactivity group in latex molecule, crosslinking agent further makes between aqueous polyurethane and aqueous polyurethane, butyronitrile
Between butyronitrile, self-crosslinking and the effect of being cross-linked with each other occur between butyronitrile and aqueous polyurethane, forms stable network point
Minor structure.Whereby, make the aqueous PU slurry of inventive formulation after being impregnated into gloves embryo, be more suitable for using spray salt mode etc. into
The processing of row frosted, and the further mechanical strength and water resistance of effective enhanced article.In addition, NBR latex is a kind of polarity
Latex, oil-soluble is poor, therefore the rubber being formed by curing has stronger oil resistivity and chemicals-resistant corrosivity, to simple aqueous
PU resin has the reinforcing effect of resistance to grease aspect resistant to chemical etching, and also indicates that through the experiment of water-fast oiliness, the method for the present invention system
Standby gloves expand unobvious (expansion rate 112%) after impregnating 24 hours in the solvent that kerosene, lubricating oil form, illustrate it
Oil resistance is excellent.
(3) present invention cooperates on the basis of improving the formula of aqueous PU slurry and increases spray salt in the process for preparing gloves
Frosted processing step, make the aqueous PU glove surface of production that there is frosted rough surface, therefore grabbing for aqueous PU gloves can be enhanced
Grip.Compared with the aqueous PU gloves of traditional smooth surface, aqueous PU frosted gloves prepared by the present invention possess excellent nonslip properties,
With better grasping performance.
(4) in addition, the aqueous PU frosted gloves of the method for the present invention preparation also have the advantage that
Compared with Heveatex gloves, due to not containing protein-based anaphylactogen, the skin of human body will not be damaged, simultaneously
The European standard of gloves EN388[industrial protection gloves-EN388 mechanicalness hazard protective gloves standard] wear-resisting grade can reach
To 4 grades, and the wear-resisting grade of EN388 of Heveatex gloves is generally 2 grades, therefore, aqueous PU frosted gloves prepared by the present invention
It is more more durable than Heveatex gloves.
Compared with traditional butyronitrile gloves, can in the environment of subzero 30 DEG C still remaining soft property, and common butyronitrile hand
Once covering environment temperature is lower than subzero 10 DEG C, will harden, comfort is very poor, influences normal wear.Therefore, prepared by the present invention
Aqueous PU frosted gloves have good resistance to low temperature.
Compared with existing common water borne PU gloves, existing common water borne PU after ten minutes, is hand-laundered general in 25 DEG C of water
Water flowing PU gloves all split, are scaling-off；And the aqueous PU gloves that prepare then remain intact after the present invention improves formula, shape without
Any variation.Therefore, the present invention is improved by formula, is compared water resistance with common PU gloves and is greatly improved.
Specific embodiment
In order to preferably explain the present invention, in order to understand, With reference to embodiment, present invention work is retouched in detail
It states.
Embodiment 1:
Step 1 prepares aqueous PU slurry, and each component mass fraction matches in the aqueous PU slurry are as follows:
Aqueous PU (40% mass fraction of solid content): 100 parts；
NBR latex: 10 parts；
Aziridine crosslinker: 1 part；
Foaming agent neopelex: 1.5 parts；
2%CMC:0.5 parts of thickener；
Aqueous color paste: 1 part；
Coefficient of foaming: 1.1 times.
Step 2 when knitted gloves embryo is heated up to 45 DEG C, immerses the calcium nitrate methanol soln of quality mass percent 2%
In coagulator, after impregnating coagulator, gloves embryo is taken out, then immerse in the aqueous PU slurry that step 1 mixes up, take out gloves, spin coating
20 seconds, obtain dipped gloves embryo.
Step 3, the sodium sulphate for selecting 60 mesh, carry out spray salt treatment to dipped gloves embryo surface, obtain product among frosted gloves.
Product among frosted gloves in 90 DEG C of times are first that 60min is dried by step 4, are then rinsed with water or foam washing, by hand
The sodium sulphate for covering surface is cleaned.
Step 5, finally temperature be 100~110 DEG C of times be 70min drying, obtain aqueous PU frosted gloves.
Embodiment 2:
Step 1 prepares aqueous PU slurry, and each component mass fraction matches in the aqueous PU slurry are as follows:
Aqueous PU (35% mass fraction of solid content): 100 parts
Aziridine crosslinker: 1 part
Foaming agent potassium oleate: 1.5 parts
2%CMC:0.5 parts of thickener
Aqueous color paste: 1 part
Coefficient of foaming: 1.2 times.
Step 2 when knitted gloves embryo is heated up to 45 DEG C, immerses the calcium nitrate methanol soln of quality mass percent 2%
In coagulator, after impregnating coagulator, gloves embryo is taken out, then immerse in the aqueous PU slurry that step 1 mixes up, take out gloves, spin coating
20 seconds, obtain dipped gloves embryo.
Step 3, the sodium chloride for selecting 80 mesh, carry out spray salt treatment to dipped gloves embryo surface, obtain product among frosted gloves.
Product among frosted gloves in 90 DEG C of times are first that 60min is dried by step 4, are then rinsed with water or foam washing, by hand
The sodium chloride for covering surface is cleaned.
Step 5, finally temperature be 100~110 DEG C of times be 70min drying, obtain aqueous PU frosted gloves.
Embodiment 3:
Step 1 prepares aqueous PU slurry, and each component mass fraction matches in the aqueous PU slurry are as follows:
Aqueous PU (40% mass fraction of solid content): 60 parts；
Aziridine crosslinker: 0.1 part；
PVA:0.2 parts of thickener；
Aqueous color paste: 1 part.
Coefficient of foaming: 1.
Step 2, when knitted gloves embryo is heated up to 45 DEG C, the calcium chloride calcium methanol for immersing quality mass percent 5% is molten
In liquid coagulator, after impregnating coagulator, gloves embryo is taken out, then immerse in the aqueous PU slurry that step 1 mixes up, takes out gloves, it is even
Glue 20 seconds, obtain dipped gloves embryo.
Step 3, the sodium sulphate for selecting 80 mesh, carry out spray salt treatment to dipped gloves embryo surface, obtain product among frosted gloves.
Product among frosted gloves in 80 DEG C of times are first that 60min is dried by step 4, are then rinsed with water or foam washing, by hand
The sodium sulphate for covering surface is cleaned.
Step 5, finally temperature be 110~120 DEG C of times be 90min drying, obtain aqueous PU frosted gloves.
Embodiment 4:
Step 1 prepares aqueous PU slurry, and each component mass fraction matches in the aqueous PU slurry are as follows:
Aqueous PU (31% mass fraction of solid content): 120 parts；
NBR latex: 35 parts；
Aziridine crosslinker: 5 parts；
Foaming agent neopelex: 6 parts；
0.5 part of zinc oxide
0.5 part of anionic surfactant
Casein: 5 parts；
Aqueous color paste: 1.5 parts；
Water: 10 parts；
Coefficient of foaming: 1.6 times.
Step 2 when knitted gloves embryo is heated up to 35 DEG C, immerses the calcium nitrate methanol soln of quality mass percent 2%
In coagulator, after impregnating coagulator, gloves embryo is taken out, then immerse in the aqueous PU slurry that step 1 mixes up, take out gloves, spin coating
50 seconds, obtain dipped gloves embryo.
Step 3, the sodium chloride for selecting 100 mesh, carry out spray salt treatment to dipped gloves embryo surface, obtain among frosted gloves
Product.
Product among frosted gloves in 75 DEG C of times are first that 90min is dried by step 4, are then rinsed with water or foam washing, by hand
The sodium chloride for covering surface is cleaned.
Step 5, finally temperature be 100~110 DEG C of times be 70min drying, obtain aqueous PU frosted gloves.
Embodiment 5:
Step 1 prepares aqueous PU slurry, and each component mass fraction matches in the aqueous PU slurry are as follows:
Aqueous PU (40% mass fraction of solid content): 80 parts；
NBR latex: 15 parts；
MOCA:2.5 parts of crosslinking agent；
Foaming agent potassium oleate: 4 parts；
2%CMC:2 parts of thickener；
Aqueous color paste: 1 part；
Zinc carbonate: 2 parts；
Water: 8 parts；
Coefficient of foaming: 1.3 times.
Step 2 when knitted gloves embryo is heated up to 50 DEG C, immerses the calcium nitrate methanol soln of quality mass percent 2%
In coagulator, after impregnating coagulator, gloves embryo is taken out, then immerse in the aqueous PU slurry that step 1 mixes up, take out gloves, spin coating
20 seconds, obtain dipped gloves embryo.
Step 3, the sodium chloride for selecting 80 mesh, carry out spray salt treatment to dipped gloves embryo surface, obtain product among frosted gloves.
Product among frosted gloves in 100 DEG C of times are first that 30min is dried by step 4, are then rinsed with water or foam washing, general
The sodium chloride of glove surface is cleaned.
Step 5, finally temperature be 105~110 DEG C of times be 80min drying, obtain aqueous PU frosted gloves.
Embodiment 6:
Step 1 prepares aqueous PU slurry, and each component mass fraction matches in the aqueous PU slurry are as follows:
Aqueous PU (35% mass fraction of solid content): 120 parts；
NBR latex: 20 parts；
Aziridine crosslinker: 1.5 parts；
Foaming agent neopelex (also serves as stabilizer): 3.5 parts；
Zinc oxide: 5 parts
2%CMC:2.5 parts of thickener；
Aqueous color paste: 1.5 parts；
Water: 15 parts；
Coefficient of foaming: 1.3 times.
Step 2 when knitted gloves embryo is heated up to 55 DEG C, immerses the zinc chloride ethanol solution of quality mass percent 4%
In coagulator, after impregnating coagulator, gloves embryo is taken out, then immerse in the aqueous PU slurry that step 1 mixes up, take out gloves, spin coating
30 seconds, obtain dipped gloves embryo.
Step 3, the sodium sulphate for selecting 80 mesh, carry out spray salt treatment to dipped gloves embryo surface, obtain product among frosted gloves.
Product among frosted gloves in 80 DEG C of times are first that 50min is dried by step 4, are then rinsed with water or foam washing, by hand
The sodium sulphate for covering surface is cleaned.
Step 5, finally temperature be 100~105 DEG C of times be 60min drying, obtain aqueous PU frosted gloves.
Embodiment 6:
Step 1 prepares aqueous PU slurry, and each component mass fraction matches in the aqueous PU slurry are as follows:
Aqueous PU (35% mass fraction of solid content): 120 parts；
NBR latex: 20 parts；
Aziridine crosslinker: 1.5 parts；
Foaming agent neopelex (also serves as stabilizer): 3.5 parts；
Zinc oxide: 5 parts
2%CMC:2.5 parts of thickener；
Aqueous color paste: 1.5 parts；
Water: 15 parts；
Coefficient of foaming: 1.3 times.
Step 2 when knitted gloves embryo is heated up to 55 DEG C, immerses the zinc chloride ethanol solution of quality mass percent 4%
In coagulator, after impregnating coagulator, gloves embryo is taken out, then immerse in the aqueous PU slurry that step 1 mixes up, take out gloves, spin coating
30 seconds, obtain dipped gloves embryo.
Step 3, the sodium sulphate for selecting 80 mesh, carry out spray salt treatment to dipped gloves embryo surface, obtain product among frosted gloves.
Product among frosted gloves in 80 DEG C of times are first that 50min is dried by step 4, are then rinsed with water or foam washing, by hand
The sodium sulphate for covering surface is cleaned.
Step 5, finally temperature be 100~105 DEG C of times be 60min drying, obtain aqueous PU frosted gloves.
Comparative example 1
Step 1 prepares aqueous PU slurry, and each component mass fraction matches in the aqueous PU slurry are as follows:
Aqueous PU (33% mass fraction of solid content): 120 parts；
Foaming agent potassium oleate: 2 parts；
2%CMC:2 parts of thickener；
Aqueous color paste: 1 part；
Water: 20 parts；
Coefficient of foaming: 1.2 times.
Step 2 when knitted gloves embryo is heated up to 45 DEG C, immerses the calcium nitrate methanol soln of quality mass percent 2%
In coagulator, after impregnating coagulator, gloves embryo is taken out, then immerse in the aqueous PU slurry that step 1 mixes up, take out gloves, spin coating
20 seconds, obtain dipped gloves embryo.
Step 3, the sodium sulphate for selecting 80 mesh, carry out spray salt treatment to dipped gloves embryo surface, obtain product among frosted gloves.
Step 4 first dries product among frosted gloves in 80 DEG C of times 60min, is then rinsed with water or foam washing, by gloves
The sodium sulphate on surface is cleaned.
Step 5 in temperature is finally the drying of 100~110 DEG C of times 70min, obtains aqueous PU foam gloves.
Performance test
To the aqueous PU frosted gloves of embodiment 1-6 preparation, detected according to the examination criteria of EN388, wear-resisting grade can be with
Reach 4 grades.
The aqueous PU frosted gloves of embodiment 1-6 preparation, test are grasped after wearing, after gloves get wet, to cylinder thing
The grippage of body is still preferable.Aqueous PU frosted gloves prepared by embodiment 1-6 are placed in refrigerator-freezer and are refrigerated, are refrigerated at -30 DEG C
3h after taking-up, carries out wearing test, and pliability is preferable, is easy to dress, but the pliability of embodiment 3 is not as good as other embodiments.And
Aqueous PU foam gloves prepared by comparative example 1, pliability is good, and grasping performance is particularly poor after meeting water.
The embodiment 1-6 gloves prepared are cut into the disk of multi-disc diameter 50mm, in the solvent that kerosene and lubricating oil form
After middle immersion 24 hours, the diameter for measuring disk is respectively less than 53mm (expansion rate is less than 112%), illustrates that its oil resistance is excellent
It is good.
Aqueous PU gloves prepared by embodiment 1-6 and comparative example 1, while 30 points are immersed in 25 DEG C of oil water mixture
Clock hand-launders respectively, and aqueous PU foam prepared by comparative example 1 splits quickly, cut, scaling-off, and the water of embodiment 1-6 preparation
Property PU gloves then remain intact, and shape is not any change.Therefore, the present invention is improved by formula, is compared with common PU gloves resistance to
It is aqueous to greatly improve.
It can be seen from the above test that the aqueous PU frosted gloves of the method for the present invention preparation are a suitable for the water-fast of extremely frigid zones
Oil resistant slip-proof glove, which not only possesses resistance to low temperature more better than Heveatex, and (quality is still more soft at low temperature for it
It is soft), and oil resistance is also better than existing common PU gloves.It handles, makes by frosted again in preparation method of the invention
The non-skid property of product gloves is also greatly improved, and is very suitable to the protection under low temperature environment to both hands, and the present invention
The gloves band frosting of preparation, has filled up the blank of aqueous PU gloves class product in the market.
Claims (10)
1. a kind of preparation method of aqueous PU frosted gloves, which comprises the steps of:
Step S1: make aqueous PU slurry: according to the mass fraction, by 60~120 parts of aqueous polyurethanes, 0~40 part of NBR latex,
0.1~5 part of crosslinking agent, 0~10 part of foaming agent, 0~6 part of activating agent, 0~5 part of stabilizer, 0~6 part of thickener, 0~
2 parts of aqueous color pastes and 0~20 part of water are mixed, and aqueous PU slurry is made；
Step S2: it impregnates aqueous PU slurry: gloves embryo is immersed in aqueous PU slurry prepared by step S1, make gloves embryo table
One layer of aqueous PU slurry is adhered in face, obtains dipped gloves embryo；
Step S3: spray salt treatment is carried out to the dipped gloves embryo surface handled through step S2, with aqueous what is be not yet fully cured
PU slurry outer surface forms frosted, obtains product among frosted gloves；
Step S4: aqueous desalination: product among the frosted gloves handled through step S3 are dried, then wash desalination；
Step S5: the aqueous PU frosted gloves are made in drying.
2. preparation method according to claim 1, which is characterized in that in step S1, the aqueous polyurethane is polyether-type
The mixture of aqueous polyurethane, polyester-type aqueous polyurethane or aforementioned the two.
3. preparation method according to claim 1, which is characterized in that in step S1, the solid content of the NBR latex is
40~50%, dosage is 10~35 parts.
4. preparation method according to claim 1 or 3, which is characterized in that in step S1, in step S1, the crosslinking agent
For one of polynary amine, polyalcohols and aziridines or any combination of aforementioned items.
5. the preparation method according to claim 4, which is characterized in that include 1 in the aqueous PU slurry of production in step S1
~6 parts of foaming agent, the aqueous PU slurry of aqueous PU slurry expansion type for making step S1, coefficient of foaming are 1.1~1.6.
6. preparation method according to claim 5, which is characterized in that in step S1, the foaming agent be selected from potassium oleate,
One or more of combinations of neopelex, lauryl sodium sulfate and potassium laurate.
7. preparation method according to claim 1, which is characterized in that in step S1, the activating agent is zinc oxide, carbonic acid
The combination of one or both of zinc and zinc stearate；The dosage of the activating agent is 0.5~5 part.
8. preparation method according to claim 1, which is characterized in that in step S1, the stabilizer is anionic surface
Activating agent or nonionic surfactant, stabilizing agent dosage are 0.5~4 part.
9. preparation method according to claim 1, which is characterized in that in step S2, the gloves embryo immerses described aqueous
It after PU slurry, is taken out from the aqueous PU slurry, spin coating is handled 15~120 seconds.
10. preparation method according to claim 1, which is characterized in that in step S3, the salt that the spray salt treatment uses is
60 mesh~100 mesh, the salt are the salt-mixture of sodium sulphate or sodium chloride or aforementioned two kinds of salt.
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