KR101599399B1 - Green polyurethane skin material and a method of manufacturing - Google Patents

Abstract

The present invention relates to an environmentally friendly polyurethane skin fabric which minimizes the generation of environmental hormones harmful to human body and a method of manufacturing the same, and more particularly to a polyurethane (polyurethane) Dimethyl formamide (DMF) used as a spinning solvent for synthetic fibers as a solvent which is a polymer compound, methyl ethyl ketone (MEK) obtained by oxidation of butyl alcohol and used as a solvent, methyl ethyl ketone) and a pigment to obtain a skin material;
The above polymer material, polyurethane, dimethyl formamide (DMF), methyl ethyl ketone (MEK), and toluene (Toluene), which is a diluent used as a methyl substituent of benzene, An adhesive compounding step of compounding the adhesive to obtain an adhesive;
A releasing paper selection step of selecting a release paper having various engraved patterns on a surface of polyethylene (Poly Ethylene) coated on a paper sheet to provide a releasing paper roll;
A skin applying step of uniformly applying the skins obtained in the skin mixing step to the surface of the release paper selected in the release paper selecting step;
(DMF) and methyl ethyl ketone (MEK: methyl ethyl ketone) are evaporated in a drying chamber in a state where the skin is formed by applying the composition on the engraved surface in the skin applying step, A skin forming drying step of forming a dry-formed skin with polyurethane (Poly Urethane), which is a polymer material that blows away and forms a color by blending pigments;
An adhesive applying step of applying the adhesive obtained in the adhesive compounding step to the surface of the skin that has been dry-molded in the skin molding and drying step;
The adhesive applied on the surface of the skin in the adhesive application step is coated with a diluent such as dimethyl formamide (DMF), methyl ethyl ketone (MEK) and methyl ethyl ketone (diluent) in a drying chamber at 120 ° C to 130 ° C, An adhesive drying step of evaporating a component of toluene and blowing it to form a sticky sticky polyurethane (Urethane) adhesive layer;
In the process described above, a skin formed of only polyurethane (Poly Urethane), which is a polymer material, is formed on the surface of a release paper on which various engraved patterns are formed, and the skin formed of a sticky polyurethane A cloth transferring step of covering a fabric made of a woven fabric or a nonwoven fabric on the adhesive layer, and pressing the same with a pressing roller so that the polyurethane adhesive penetrates and adheres integrally with the fabric;
A raw material rolling process in which a polyurethane adhesive of a polyurethane adhesive layer formed on the surface of the skin in the fabric transferring step is integrally infiltrated into the fabric so that the skin and the fabric are integrally joined and wound in a roll state;
After aging for 12 hours in an aging chamber maintained at 80 ° C to 90 ° C in a rolled state in the far-end rolling process, residual DMF (dimethyl formamide), methyl ethyl ketone (MEK) , Aging the components of the diluent toluene (Toluene) completely evaporated and blowing them to cure the sticky sticky polyurethane (Urethane) adhesive so that the fabric and the skin are integrated;
A release paper separating step of separating the release paper from the surface of the skin in a state where the adhesive is completely cured in the aging step and the fabric and the skin are integrated,
The fabric is rolled in a rolled state by unifying the fabric and the skin, and heated by passing hot rollers and hot chambers at 180 ° C for 10m / min. At the same time, hot air is blown by indirect thermal spraying method to remove total volatile organic compounds (EN) An environmental hormone removal process for removing environmental hormones, which are harmful substances including nitrogen oxides (TVOC), toluene (Toluene) and formaldehyde,
The surface of the skin from which the environmental hormone was removed in the environmental hormone removal step was heated by indirect heat at 200 ° C, heated by direct heat at 180 ° C, and then quenched to densely recrystallize the surface texture. Wherein an environmental hormone shielding step is further performed to prevent environmental hormones, which are harmful substances, from leaking to the outside.

Description

Technical Field [0001] The present invention relates to a green polyurethane skin material and a manufacturing method thereof,

The present invention relates to an environmentally friendly polyurethane skin fabric which suppresses the generation of harmful environmental hormones in the manufacture of artificial leather used as furniture and other interior materials, and a manufacturing method thereof, -2014-0023231.

Functional polymers have been developed according to the development of modern scientific civilization, and artificial leather is developed by using polyurethane, and the use thereof is gradually increasing.

Conventionally, a large amount of lead compounds (Pb-Octoates, Pb-Naphthanates) or tin compounds have been used as a curing accelerator for polyurethane. These curing accelerators can easily react with a urethane prepolymer and a polyol curing agent mixture, In addition to providing physical performance, the price is also relatively economical, while the environmental hormones that cause various diseases cause problems in use.

However, the use of backing to apply and contain polyurethane in the manufacture of carpets and other fabrics gives bulk and stiffness to the fabric, secures the pile fibers to the first backside of the fabric, and increases the dimensional stability of the fabric, It is gradually increasing.

The use of such polyurethane backing materials is described in U.S. Patent No. 4,296,159 to Jenkines et al.

The composition of the polyurethane-forming composition used in the backside treatment of fabrics is determined by the following four competitive factors:

The first backed fabric must be at least as prone to wrinkling or deformation as time elapses and secondly the backing should be as tack free as possible so that the fabric does not adhere to itself or to other materials during storage and use Third, the back side should be strongly adhered to the substrate fabric, and fourth, the occurrence of environmental hormones should be minimized.

Thermoplastic polyurethane (TPU) is a thermoplastic polymer having repeating units of urethane bonds in the molecule (-NHCOO-), and is a thermoplastic plastic having firing by heating, and is an elastic polymer having rubber-like elasticity at room temperature.

Thermoplastic polyurethanes are widely used in automobile bumpers, cable jackets, synthetic leather, etc. because of their excellent elasticity, mechanical properties, vibration absorbability, abrasion resistance, tear strength, oil resistance and low temperature characteristics.

Thermoplastic polyurethanes can be prepared by batch or continuous polymerization processes and are industrially produced in a continuous extrusion process wherein the starting materials are metered into a screw reactor and subjected to a condensation reaction, (US Patent No. 3,642,964).

The polyurethane is generally composed of a hard segment and a soft segment, and as a hard segment, toluene diisocyanate (TDI), diphenylmethane diisocyanate (4, 4 ') which are most commonly used as aromatic diisocyanates, hexamethylene diisocyanate (HDI), and hydrogenated MDI (H12MDI) are used as the aliphatic diisocyanate, and modified MDI such as carbodiimide MDI and the like are used as the aliphatic diisocyanate, And styrene (styrene) or styrene acrylonitrile (SAN) dispersed polymer polyol.

The soft segments include polyester polyols and polyether polyols. Polyols used in thermoplastic polyurethanes have a molecular weight of 1000 to 3000 (g / mol). Polyester polyols are adipic acid (ethylene glycol), ethyleneglycol (EG), diethyleneglycol (DEG), 1,4-butylene glycol (BD) and the like at a temperature of 150 ° C or higher, or by caprolactone ring opening opening reaction.

Polyester polyol is mostly used in the production of thermoplastic polyurethane. It has excellent abrasion resistance and mechanical strength, but it is weak in water resistance and alkali resistance.

The polyether polyol is prepared by a high-pressure, low-temperature reaction using ethylene oxide, propylene oxide, ethylene glycol, and glycerol together with a potassium hydroxide (KOH) catalyst.

Polyether polyols are mostly made of polyurethane foam because they have excellent flexibility, elasticity, and compression set. The polyurethane foam is widely used for automobile seat, refrigerator insulation, container insulation, building insulation, etc. .

In recent years, thermoplastic polyurethane has been attracting attention as an eco-friendly substitute for environmental hormones generated by combustion of polyvinyl chloride (PVC) and environmental regulations. PVC is an additive for improving plasticity and durability, Additives such as lubricants, plasticizers, UV stabilizers and the like are mixed.

However, phthalate plasticizer, which is mainly used as a plasticizer among additives, is known as a so-called environmental hormone substance which disturbs the endocrine system in the human body and its use is limited.

In addition, lead, tin-based stabilizers, UV stabilizers, and antioxidants are also used as heavy metals and environmental hormones, which are harmful to the human body.

Extruded sheets or calendared sheets of PVC or PVC / ABS alloy are widely used as a skin agent for instrument panels, door trim panels, and headlining. Recently, as environmental problems, they have been used as thermoplastic polyurethane There are a lot of patents that replace it with.

In spite of this expansion of application, polyurethane has high cohesive energy, high polarity and high tackiness properties, which leads to low processability and productivity, and thermoplastic polyurethane has a problem of aromatic diisocyanate and polyester polyol There is a problem that it is poor in weatherability (UV), heat resistance, and water resistance in addition to processability because it is mainly used.

The prior art patent literature on polyurethanes developed so far is as follows.

Patent Application No. 10-1987-0700424 (1985 May 15, 1985) discloses a process for preparing a polyurethane foam comprising the steps of: (a) providing a relatively high equivalent weight polyol containing an average of 1.4 to 1.95 hydroxyl groups per molecule (wherein at least 30% Group) or at least one further relatively high equivalent of polyol containing at least an average of 2.05 hydroxyl groups per molecule (wherein at least 30% of the hydroxyl groups are primary hydroxyl groups) and the polyol Containing polyols; (b) a relatively low equivalent of compound having about 2 active hydrogen-containing moieties per molecule; (c) a polyisocyanate; And (d) a catalytic amount of a catalyst for the reaction of the polyol and the polyisocyanate, wherein the number and ratio of functional groups of components (a), (b) and (c) To 2.03, and the isocyanate index of the composition is selected to be 85 to 125). One side of the fabric is coated with a coating (the wig coating weight is 1 to 300 ares / yd2, i.e. 0.03 to 10.2 kg / m < 2 >), the coated fabric is then heated to 50 to 150 DEG C until the polyurethane-forming composition is cured in a viscous state, so that the polyurethane- It is a method of manufacturing fabrics. Patent Application No. 10-1999-0026805 (Jul. 30, 1999) discloses a polyester polyol (A-1) having a number average molecular weight of 1,000 to 5,000 and an enthalpy of crystallization of 70 J / g or less and a polyether polyol having a number average molecular weight of 500 to 2,500 -2), wherein the polyol composition (A) has an average number of functional groups (f) of the inherent hydroxyl groups of 2.006 to 2.100; Organic diisocyanate (B); (B) is the number of moles of the organic diisocyanate (B), c is the chain elongation (C) of the polyol composition (A) (C), and a method for producing polyurethane elastic fibers which melt-spin the thermoplastic polyurethane and elastic fibers containing the thermoplastic polyurethane and the thermoplastic polyurethane. Patent Application No. 10-2006-0096222 (Sep. 29, 2006) discloses an acrylic-vinyl modifier for thermoplastic polyurethane, a process for producing the same, and a thermoplastic polyurethane comprising the modifier, wherein the modifier of the present invention comprises an acrylate monomer , An acrylic-vinyl based rubbery core containing a vinyl-based monomer and a crosslinkable monomer; And a hard shell surrounding the core and containing an acrylate-based monomer, a vinylaromatic monomer, and a vinyl cyanide-based monomer. The modifier of the present invention has an effect of improving the tackiness, workability, weather resistance, heat resistance and water resistance of the thermoplastic polyurethane and increasing the maximum of 30% up to 30% compared with the case where a small amount of an impact modifier such as ABS is used in a polyurethane. Patent Application No. 10-2008-0137159 (2008.12.30) discloses a method for producing a stretchable polyurethane nonwoven fabric by various electrospinning methods and a stretchable polyurethane nonwoven fabric produced by the method, wherein the stretchable polyurethane nonwoven fabric comprises a thermoplastic polyurethane- Preparing a mixture; Melting the spinning mixture to prepare a thermoplastic polyurethane melt; And a step of forming a polyurethane nano fiber layer by thinning the polyurethane melt by electrospinning the polyurethane melt under a voltage applied between the spinneret and the collector, wherein the step of preparing the thermoplastic polyurethane melt comprises heating the melt at a temperature of 120 to 350 Lt; 0 > C and maintaining the viscosity of the melt within the range of 40 to 40,000 cp. The present invention relates to an environmentally friendly polyurethane binder composition, a polyurethane binder chip and a polyurethane packaging material produced by the same, wherein the environmentally friendly polyurethane binder composition according to the present invention comprises (i) free (Ii) 100 parts by weight of a urethane prepolymer subject having an NCO content of 3.5 to 6.5%, (ii) an inorganic filler and a pigment, wherein the amount of the beeswax compound is 0.1 to 3.0 parts by weight relative to 100 parts by weight of the polyol curing agent And 100 to 300 parts by weight of the polyol curing agent to which the compound is added. Patent Application No. 10-2009-0081961 (2009.09.01) can prevent scratches on the surface of the electronic product when the PU sheet is used as a case for protecting the electronic product by using the N / P split yarn as the fabric, The advantage of the PU sheet made by the wet processing method (the advantage that the surface of the case is not smooth and has the predetermined friction force) is realized as it is, so that it is possible to prevent the electronic product from falling down to the floor, Thereby realizing a manufacturing method of a polyurethane sheet. Patent Application No. 10-2011-7003457 (Jul. 28, 2009) is a cushioning material such as a seat cushion for automobiles which contributes to environmental load reduction, and which is used for obtaining a polyurethane foam which achieves high yield, good hardness and excellent durability in a balanced manner The polyester polyol having a hydroxyl group content of 15 to 100 mg KOH / g is preferably a polyester polyol having a hydroxyl group-containing fatty acid and a hydroxyl group-containing fatty acid ester , And a polyhydric alcohol having an average functional group number of more than 3 and less than or equal to 8, wherein the total amount of the hydroxyl group-containing fatty acid and the hydroxyl group-containing fatty acid ester in the raw material is 90 To 100% by mass. Patent Application No. 10-2012-0004004 (Jan. 12, 2012) discloses a method for producing a polycarboxylic acid having 2 to 10 carbon atoms, a residue of ethylene glycol, and a residue of 1,4-butanediol in a molar ratio of 1: 0.3 to 0.7: 0.3 to 0.7 As a molar ratio of the polyester polyol; Chain extenders; And a polyisocyanate compound, a process for producing such a polyurethane resin, a polyurethane resin composition comprising the polyurethane resin, and a polyurethane support pad made using the polyurethane resin .

The present invention solves the above-mentioned problems of the prior art polyurethane fibers, including artificial leather, by detecting a large amount of environmental hormones and other harmful substances in the human body, thereby threatening the health of the user. In order to protect the consumers by producing and supplying environmentally friendly polyurethane skin fabrics harmless to the human body, we have made some improvements in the patent application No. 10-2014-0023231, Friendly polyurethane skin fabric and a manufacturing method thereof.

In order to achieve the above object, the present invention relates to a method for producing a polyurethane foam, which is obtained from petroleum chemical products such as polyethylene, polystyrene and polypropylene, which is a patent application No. 10-2014-0023231 filed by the inventor of the present invention, 15 to 25% by weight of polyurethane (Poly Urethane), which is a polymer substance widely used for construction materials, packaging materials, and household accessories, and polar organic solvent, and is used as a solvent for various chemical reactions. Particularly, 20 to 30% by weight of dimethylformamide (DMF) used as a spinning solvent for synthetic fibers as an excellent solvent for polyacrylonitrile which is obtained by the oxidation of butyl alcohol 45 to 55% by weight of methyl ethyl ketone (MEK: methyl ethyl ketone) used as a solvent for nitrocellulose, vinyl resin and cellulose nitrate, and 2 to 8% by weight of pigment for producing color To obtain a skin material;

The polymer material is prepared by mixing 55 to 55% by weight of polyurethane, 5 to 15% by weight of dimethylformamide (DMF), 5 to 15% by weight of methyl ethyl ketone (MEK) , Methyl substituent of benzene which is insoluble in water but is mixed with most organic solvents such as ethanol ether benzene, toluene (toluene) which is used for synthesis of cresol and benzoic acid besides for solvent, and diluent used for benzene production by demethylation, 25 to 35% by weight of the adhesive agent to obtain an adhesive agent;

A releasing paper selection step of selecting a release paper having various engraved patterns on a surface of polyethylene (Poly Ethylene) coated on a paper sheet to provide a releasing paper roll;

A skin applying step of uniformly applying the skin obtained in the skin mixing step to a surface of 0.1 to 0.3 mm thickness uniformly on the surface of the release paper selected in the release paper selection step on the various engraved patterns;

In the skin applying step, the skin is applied to the surface having the engraved pattern, and in the drying chamber of 110 ° C to 120 ° C, dimethyl formamide (DMF: Dimethyl Formamide) and methyl ethyl ketone (MEK: methyl ethyl a skin forming drying step of forming a dry molded skin with polyurethane (polyurethane), which is a polymer material that evaporates and blows off the ingredients of the ketone and blends the pigment to form a color;

An adhesive applying step of uniformly applying the adhesive obtained in the adhesive compounding step to the surface of the skin that has been dry-molded in the skin molding and drying step to a thickness of 0.1 to 0.3 mm;

The adhesive applied on the surface of the skin in the adhesive application step is coated with a diluent such as dimethyl formamide (DMF), methyl ethyl ketone (MEK) and methyl ethyl ketone (diluent) in a drying chamber at 120 ° C to 130 ° C, An adhesive drying step of evaporating a component of toluene and blowing it to form a sticky sticky polyurethane (Urethane) adhesive layer;

In the process described above, a skin formed of only polyurethane (Poly Urethane), which is a polymer material, is formed on the surface of a release paper on which various engraved patterns are formed, and the skin formed of a sticky polyurethane A cloth transferring step of covering a fabric made of a woven fabric or a nonwoven fabric on the adhesive layer, and pressing the same with a pressing roller so that the polyurethane adhesive penetrates and adheres integrally with the fabric;

A raw material rolling process in which a polyurethane adhesive of a polyurethane adhesive layer formed on the surface of the skin in the fabric transferring step is integrally infiltrated into the fabric so that the skin and the fabric are integrally joined and wound in a roll state;

After aging for 12 hours in an aging chamber maintained at 80 ° C to 90 ° C in a rolled state in the far-end rolling process, residual DMF (dimethyl formamide), methyl ethyl ketone (MEK) , Aging the components of the diluent toluene (Toluene) completely evaporated and blowing them to cure the sticky sticky polyurethane (Urethane) adhesive so that the fabric and the skin are integrated;

A release paper separating step of separating the release paper from the surface of the skin in a state where the adhesive is fully cured in the aging step and the fabric and the skin are integrated;

The fabric is rolled in a rolled state by unifying the fabric and the skin, and heated by passing hot rollers or hot chambers at 180 ° C for 10 m / min. Then, hot air is directly blown to the skin fabric to remove total volatile organic compounds An environmental hormone removing step of blowing out environmental hormones, which are toxic substances including benzene, toluene, formaldehyde, into a ventilator;

In the environmental hormone screening process, the surface of the skin, from which the environmental hormone is removed in the environmental hormone removing process, is heated by indirect heat at 200 ° C, the rear surface is heated by direct heat at 180 ° C and then quenched to densely recrystallize the surface texture An environmental hormone shielding process which shields the environmental hormone, which is a residual harmful substance contained in the skin fabric, from leaking to the outside; In addition, a 0.1-0.3 mm thick skin is bonded to a fabric made of woven fabric or nonwoven fabric in an integrated manner so that the environment hormone, which is a harmful substance, is removed, and the environment hormone, which is a harmful substance, It constitutes polyurethane skin fabric.

The environmentally friendly polyurethane binder composition according to the present invention does not contain a heavy metal which is an environmental hormone regulating material and completely discharges the diluent to minimize the residual of harmful substances and also prevents leakage of the environment hormone which is a residual harmful substance, It is eco-friendly and has various physical properties such as protecting consumers because environmental hormones are not emitted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Before describing the embodiments of the present invention, the main properties of the present invention will be described as follows.

Polyurethane (PU): It is a polymer material which is obtained from petrochemical products such as polyethylene, polystyrene and polypropylene, is harmless to human body and has excellent elasticity and strength and is widely used for building materials, packaging materials, .

Dimethylformamide (DMF): As a polar organic solvent, it is used as a solvent for various chemical reactions. Particularly, it is an excellent solvent for polyacrylonitrile which is a polymer compound. It is a spinning solvent for synthetic fibers ), Which has the formula C3H7NO and has a melting point of 61 ° C, a boiling point of 153 ° C and a molecular weight of 73.1, which is a colorless liquid. Pure odorless but poor quality is often fishy due to impurities of dimethylamine, It can be mixed with most, synthesized by methyl formate and dimethylamine, or by the reaction of dimethylamine with carbon monoxide, which is not stable in strong acids and strong bases, especially hydrolysis with formic acid and dimethylamine at high temperatures.

Methyl ethyl ketone (M.E.K): A solvent such as nitrocellulose, vinyl resin or cellulose nitrate, which has a boiling point of 79.6 ° C as a liquid having the formula CH 3 COC 2 H 5 and is obtained by oxidation of butyl alcohol.

Toluene: A diluent used in adhesives. It was first named in toluene balsam, a natural resin, in 1835, so it was named toluene and was later found in the dry distillation of coal. Is a colorless liquid with a specific odor and has a molecular weight of 92.14, a melting point of 95 占 폚, a boiling point of 110.8 占 폚, a specific gravity 0.87 (15), which does not dissolve in water but is mixed with most organic solvents such as ethanol ether benzene at an arbitrary ratio. It is used in the synthesis of cresol, benzoic acid, etc. in addition to solvents, and is used for the production of benzene by demethylation.

Pigment: It is blended with polyurethane (PU: Poly Urethane) as coloring material and produces various colors.

 R.P .: release paper: Polyethylene is coated on paper, and various engraved patterns are engraved, and the engraved pattern determines the surface pattern of the finished product.

In carrying out the present invention, it is obtained from petroleum products such as polyethylene, polystyrene, and polypropylene, and is harmless to the human body and has excellent elasticity and strength. Therefore, the poly It is used as a solvent for various chemical reactions as a polyurethane and a polar organic solvent. Especially, it is used as a spinning solvent for synthetic fibers as an excellent solvent for polyacrylonitrile which is a polymer compound. Dimethyl formamide (DMF), methyl ethyl ketone (MEK: methyl ethyl ketone) obtained by oxidation of butyl alcohol and used as a solvent for nitrocellulose, vinyl resin and cellulose nitrate, and a pigment To obtain a skin material; The above polymer materials, such as polyurethane, dimethyl formamide (DMF), methyl ethyl ketone (MEK) and methyl substitution products of benzene, which are insoluble in water, An adhesive compounding step of blending with an organic solvent of toluene, toluene (toluene), which is used in the synthesis of cresol, benzoic acid, and the like, and diluent used in benzene production by demethylation, to obtain an adhesive; A releasing paper selection step of selecting a release paper having various engraved patterns formed on the surface of polyethylene (Poly Ethylene) coated on a paper to provide a releasing paper roll; A skin applying step of applying the skins obtained in the skin mixing step to a uniform thickness on a surface having various engraved patterns of the release paper selected in the release paper selecting step; (DMF) and methyl ethyl ketone (MEK: methyl ethyl ketone) are evaporated in a drying chamber in a state where the skin is formed by applying the composition on the engraved surface in the skin applying step, A skin forming drying step of forming a dry molded skin with polyurethane (Poly Urethane), which is a polymer material that blends with pigments and creates color by mixing with pigments; An adhesive applying step of applying the adhesive obtained in the adhesive compounding step to the surface of the skin that has been dry-molded in the skin molding and drying step; The adhesive applied on the surface of the skin in the adhesive application step is applied to the surface of the skin in a dry chamber by using a diluent such as dimethyl formamide (DMF), methyl ethyl ketone (MEK) and toluene (Toluene) To form a polyurethane (Urethane) adhesive layer in a sticky state; In the process described above, a skin formed of only polyurethane (Poly Urethane), which is a polymer material, is formed on the surface of a release paper on which various engraved patterns are formed, and the skin formed of a sticky polyurethane A cloth transferring step of covering a fabric made of a woven fabric or a nonwoven fabric on the adhesive layer, and pressing the same with a pressing roller so that the polyurethane adhesive penetrates and adheres integrally with the fabric; A raw material rolling process in which a polyurethane adhesive of a polyurethane adhesive layer formed on the surface of the skin in the fabric transferring step is integrally infiltrated into the fabric so that the skin and the fabric are integrally joined and wound in a roll state; The components of residual dimethylformamide (DMF), methyl ethyl ketone (MEK) and toluene (Toluene) as a diluent are completely evaporated in the aging chamber while being wound in the roll state in the raw rolling process To agitate the fabric so that the fabric and the skin are united with each other by curing the polyurethane adhesive in a sticky state; A release paper separating step of separating the release paper from the surface of the skin in a state where the adhesive is fully cured in the aging step and the fabric and the skin are integrated;

(TVOC), toluene (Toluene), and formaldehyde (Formaldehyde), which are extracted from the skin fabric by blowing with an indirect heater heat while passing through the room at a room temperature of 180 ° C for 10 m / An environmental hormone removing step of blowing off the foreign substances to a plurality of ventilators;

The surface of the skin from which the environmental hormone was removed in the environmental hormone removal step was heated by indirect heat at 200 ° C, heated by direct heat at 180 ° C, and then quenched to densely recrystallize the surface texture. A method for producing a polyurethane skin fabric, which comprises applying an environmental hormone shielding process for treating an environmental hormone which is a harmful substance so as not to leak to the outside, wherein the fabric is made of a woven fabric or a nonwoven fabric; A mixture of 55 to 55% by weight of polyurethane, 25 to 35% by weight of toluene, 5 to 15% by weight of dimethylformamide (DMF), 5 to 15% by weight of methyl ethyl ketone (MEK) By weight to 15% by weight; 15 to 25% by weight of polyurethane, 45 to 55% by weight of methyl ethyl ketone (MEK), 20 to 30% by weight of dimethylformamide (DMF) and 2 to 8% by weight of pigment And a skin of 0.1 to 0.3 mm in thickness obtained by blending together a polyurethane skin fabric having a thickness of 0.1 to 0.3 mm obtained by unifying the polyurethane skin fabric. The polyurethane skin fabric was heated again to 180 DEG C and hot air was blown thereon. The surface of the skin fabric is heated by indirect heat of 200 ° C so that the environmental hormone which is a harmful substance extracted from the skin fabric is blown by blowing hot air directly to the skin fabric and the remaining residual harmful substance, The surface of the back surface is heated and quenched to form an environmentally friendly polyurethane skin fabric having a dense surface structure.

15 to 25% by weight of polyurethane, 45 to 55% by weight of methyl ethyl ketone (MEK), 20 to 30% by weight of dimethylformamide (DMF) in the skin mixing step, And 55 to 55% by weight of polyurethane, 25 to 35% by weight of toluene, 25 to 35% by weight of dimethylformamide (DMF (dimethylformamide)), : 5 to 15% by weight of dimethyl formamide, and 5 to 15% by weight of methyl ethyl ketone (MEK).

At this time, in the far-end rolling process, in the state where the polyurethane adhesive of the polyurethane (polyurethane) adhesive layer formed on the surface of the skin in the far-end transferring process is integrally infiltrated into the fabric and the skin and the fabric are integrally joined, It is more effective to wrap the paper between the surface of the paper and the release paper.

The thickness of the skin is 0.1 to 0.3 mm in the skin applying step, the drying temperature is maintained at 110 to 120 ° C in the skin molding drying step, and the thickness of the adhesive in the adhesive applying step is 0.1 to 0.3 the adhesive is applied in a thickness of 0.1 to 0.3 mm in the adhesive applying step and the drying temperature is maintained at 120 to 140 DEG C in the adhesive drying step and the aging temperature is adjusted to 80 to 90 DEG C Keep it for 12 hours.

Particularly, in the environmental hormone removing process, the fabric and the skin are integrally joined together and the skin fabric wound in a rolled state is loosened, heated by passing the hot roller and the hot chamber at 180 ° C for 10 m per minute, The environmental hormone, which is a harmful substance including total volatile organic compounds (TVOC), toluene and formaldehyde extracted from the skin fabric by blowing hot air, is blown out by a ventilator, , The surface of the skin fabric in which the environmental hormone was removed in the process of removing the environmental hormone was heated by indirect heat at 200 ° C, the back surface was heated by direct heat at 180 ° C, and then quenched to densely recrystallize the surface texture. The remaining harmful substances, the environmental hormones, are shielded from leakage to the outside.

Hereinafter, embodiments of the present invention will be described in detail.

Skin mixing process;

Polyurethane (Poly Urethane), which is a polymer material widely used in construction materials, packaging materials, and life accessories since it is obtained from petrochemical products such as polyethylene, polystyrene, and polypropylene and is harmless to human body and has excellent elasticity and strength, As a polar organic solvent, it is used as a solvent for various chemical reactions. In particular, dimethylformamide (DMF), which is used as a spinning solvent for synthetic fibers as an excellent solvent for polyacrylonitrile, (Methyl ethyl ketone), which is obtained by oxidation of butyl alcohol and used as a solvent for nitrocellulose, vinyl resin, and cellulose nitrate, and a pigment for producing color, Material is obtained.

At this time, the compounding ratio is 15 to 25% by weight of the polyurethane, 20 to 30% by weight of dimethylformamide (DMF), 45 to 55% by weight of methyl ethyl ketone (MEK) By weight and 2 to 8% by weight of a pigment. The most suitable blending ratio according to the results obtained by the inventors of the present invention is 20% by weight of a polyurethane, 25% by weight of dimethylformamide (DMF) %, Methyl ethyl ketone (MEK: methyl ethyl ketone) 50% by weight, and pigment 5% by weight.

Adhesive compounding process;

The above polymeric materials such as polyurethane, dimethyl formamide (DMF), methyl ethyl ketone (MEK) and methyl-substituted benzene, which are insoluble in water, (Toluene), which is a diluent used for the synthesis of cresol, benzoic acid and the like and used for the production of benzene by the demethylation reaction, is mixed with the organic solvent of the organic solvent to obtain a sticky adhesive.

At this time, the compounding ratio is 55 to 55% by weight of a polyurethane material (polyurethane), 5 to 15% by weight of dimethylformamide (DMF), 5 to 15% by weight of methyl ethyl ketone (MEK) By weight and 25 to 35% by weight of toluene as a diluent. According to the results obtained by the inventors of the present invention, the most appropriate blending ratio is 50% by weight of polyurethane (Urethane) and 50% by weight of dimethylformamide DMF: Dimethyl Formamide), 10% by weight of methyl ethyl ketone (MEK: methyl ethyl ketone), and 30% by weight of toluene (Toluene) as a diluent.

A release paper selection process;

A release paper roll having a variety of engraving patterns to be formed on the surface of the skin is selected on the surface of polyethylene (Poly Ethylene) coated on the paper.

At this time, the engraved pattern formed on the surface of the release paper will appear as a relief pattern on the surface of the completed skin, and the shape of the pattern will also be not particularly limited.

Also, the release paper used in this case determines the size of the skin, and as a result of the present invention, the width is 1,700 mm and the length is preferably 1000 m to 2000 m.

Skin application process;

The skins obtained in the skin mixing step are applied on the surface of the release paper selected in the release paper selection step on the various engraved patterns in a uniform thickness.

At this time, it is preferable that the thickness of the skin is 0.1 to 0.3 mm, but as a result of the present invention, it is most preferable to uniformly coat the skin with a thickness of 0.15 to 0.2 mm.

In performing the skin applying process on the surface of the release paper, a partition is formed on both sides in the width direction of the release paper so that the skin can not flow out. Then, the skin is continuously poured while transferring the release paper, So that the skin is uniformly applied to the surface of the mold surface on which the engraved pattern is formed.

A skin molding drying process;

In the skin applying step, the skin is coated on the surface of the mold having the engraved pattern formed thereon with a uniform thickness, and the resulting mixture is passed through a drying chamber to form a mixture of dimethyl formamide (DMF) and methyl ethyl ketone Ethyl ketone is evaporated and blown away. Polyurethane (Poly Urethane), a polymer material that creates color by mixing pigments, forms a dry molded skin.

At this time, the temperature of the drying chamber is preferably maintained at 100 ° C to 140 ° C, but the most ideal temperature is 110 ° C to 120 ° C.

An adhesive application process;

The adhesive obtained in the adhesive compounding step is applied to the surface of the skin that has been dry-molded in the skin molding and drying process to a uniform thickness.

At this time, it is preferable that the thickness of the adhesive is 0.1 to 0.3 mm, which is equal to the thickness of the skin, but as a result of the present invention, it is most preferable to uniformly apply the adhesive to a thickness of 0.15 to 0.2 mm.

In performing the adhesive applying process on the surface of the skin, a partition is formed on both sides in the width direction of the release paper so that the adhesive does not flow out to the outside. Then, the skin is transferred to the release paper while continuously conveying the adhesive, The adhesive is applied to the surface of the skin at a uniform thickness by adjusting the thickness of the adhesive to the desired thickness.

Adhesive drying process;

In the adhesive application step, the adhesive applied on the surface of the skin is completely blown off by passing the diluent (DMF: Dimethyl Formamide) and the methyl ethyl ketone (MEK: methyl ethyl ketone) The components of the diluent toluene are evaporated to form a sticky polyurethane adhesive layer.

At this time, the temperature of the drying chamber is preferably maintained at 100 ° C to 140 ° C, but the most ideal temperature is 120 ° C to 130 ° C.

Fabric transfer process;

In the process described above, a skin formed of only polyurethane (Poly Urethane), which is a polymer material, is formed on the surface of a release paper on which various engraved patterns are formed, and the skin formed of a sticky polyurethane Urethane) The fabric is covered with a woven fabric or a nonwoven fabric on the adhesive layer, and is pressed with at least one or more pressing rollers so that the polyurethane adhesive penetrates and adheres integrally with the fabric.

In this case, the woven fabric used as the fabric is integrally formed with the skin to determine the quality of the product, so a good fabric is used as long as the cost is not adhered to.

Fabric rolling process;

A polyurethane adhesive of a polyurethane (Urethane) adhesive layer formed on the surface of the skin in the fabric transferring step is integrally infiltrated into the fabric so that the skin and the fabric are rolled up in a state of being integrally joined.

In this case, it is possible to reduce the time for the curing of the adhesive by winding the paper between the surface of the fabric and the releasing paper by wrapping the paper together or by wrapping the cloth one more time, as well as promoting the release of the harmful substances contained in the adhesive, .

Aging process;

In the raw rolling process, the resin is aged in an aging chamber in a rolled state to completely evaporate residual dimethylformamide (DMF) and methyl ethyl ketone (MEK) components, The components of toluene are completely evaporated and blown to cure the sticky Poly Urethane adhesive so that the fabric and the skin are mated together so as to be joined together.

At this time, the temperature of the aging chamber is preferably maintained at 100 ° C or less, and the most ideal aging temperature is preferably aged at 80 ° C to 90 ° C for 12 hours or more.

In this case, if the fabric is rolled with a paper between the surface of the fabric and the releasing paper, or if the fabric is rolled up one by one, the adhesive of dimethyl formamide (DMF) and methyl ethyl ketone (MEK) And a toluene component as a diluent are discharged to the outside through the above-described Hanjina fabric and are completely blown away.

Therefore, the fabric which is sandwiched between the surface of the fabric and the releasing paper may be more effective if it is woven with a mesh cloth having good water repellency.

In addition, even if a general paper is put in place in place of the paper, the effect thereof can not be neglected.

Release paper separation process;

In the aging process, the adhesive is fully cured and the release paper is separated from the surface of the skin in a state where the fabric and the skin are integrated, and only the skin fabric is inspected and rolled with a roll.

Environmental hormone removal process;

The cloth and the skin are joined together, and the skin fabric wound in the roll state is released and heated. At the same time, the environmental hormone which is extracted from the skin fabric by blowing hot air is blown out by a fan.

At this time, in the environmental hormone removing process, the fabric and the skin are integrally joined together and the skin fabric wound in a rolled state is loosened, heated by passing through a hot roller or a hot chamber at 180 ° C for 10 m per minute, and then directly heated Environmental hormones, which are harmful substances including total volatile organic compounds (TVOC), toluene, and formaldehyde, which are extracted from skin fabrics by blowing hot air, are blown out by a fan to remove almost all environmental hormones Is removed.

Environmental hormone screening process;

In the environmental hormone removing step, the skin material from which the environmental hormone has been removed is heated to 180 to 200 ° C, and quenched to treat the environment hormone, which is a residual harmful substance contained in the skin material, from leaking out.

At this time, in the environmental hormone shielding step, the surface of the skin material in which the environmental hormone is removed in the environmental hormone removing step is heated by indirect heat at 200 ° C., the rear surface is heated by direct heat at 180 ° C., And the surface tissue is densely recrystallized by being quenched into the holding chamber so that the environmental hormone which is the residual harmful substance contained in the skin fabric is shielded from leaking to the outside so that the environment hormone which is a harmful substance during use does not leak to the outside A polyurethane skin fabric is produced.

A method for producing a polyurethane skin fabric according to the above-described embodiment, comprising the steps of: A mixture of 55 to 55% by weight of polyurethane, 25 to 35% by weight of toluene, 5 to 15% by weight of dimethylformamide (DMF), 5 to 15% by weight of methyl ethyl ketone (MEK) By weight to 15% by weight; 15 to 25% by weight of polyurethane, 45 to 55% by weight of methyl ethyl ketone (MEK), 20 to 30% by weight of dimethylformamide (DMF) and 2 to 8% by weight of pigment % Of a skin having a thickness of 0.1 to 0.3 mm were integrally bonded to each other, and the skin fabric was heated to 180 DEG C, hot air was blown thereon, and the hot roller and the hot chamber were passed through at intervals of 10 m per minute The surface of the skin fabric is heated by indirect heat at 200 ° C so that the environmental hormone which is a harmful substance extracted from the skin fabric is removed by blowing hot air directly to the skin fabric by the indirect thermal spraying method and the remaining residual harmful substance, The back surface is heated with direct heat at 180 ° C and quenched to form a dense surface structure.

The above-described present invention minimizes the leakage of the residual environmental hormone to the outside in the production of skin fabrics, so that it can be carried out immediately on building materials, packaging materials, and household items.

Claims (4)

Polyurethane (Poly Urethane) which is a polymer material and dimethyl formamide (DMF) which is used as a spinning solvent of synthetic fiber with a solvent which is a polymer compound are obtained by oxidation of butyl alcohol A skin mixing process for obtaining a skin material by blending methyl ethyl ketone (MEK: methyl ethyl ketone) used as a solvent and a pigment;
The above polymer material, polyurethane, dimethyl formamide (DMF), methyl ethyl ketone (MEK), and toluene (Toluene), which is a diluent used as a methyl substituent of benzene, An adhesive compounding step of compounding the adhesive to obtain an adhesive;
A releasing paper selection step of selecting a release paper having various engraved patterns on a surface of polyethylene (Poly Ethylene) coated on a paper sheet to provide a releasing paper roll;
A skin applying step of uniformly applying the skins obtained in the skin mixing step to the surface of the release paper selected in the release paper selecting step;
(DMF) and methyl ethyl ketone (MEK: methyl ethyl ketone) are evaporated in a drying chamber in a state where the skin is formed by applying the composition on the engraved surface in the skin applying step, A skin forming drying step of forming a dry-formed skin with polyurethane (Poly Urethane), which is a polymer material that blows away and forms a color by blending pigments;
An adhesive applying step of applying the adhesive obtained in the adhesive compounding step to the surface of the skin that has been dry-molded in the skin molding and drying step;
The adhesive applied on the surface of the skin in the adhesive application step is coated with a diluent such as dimethyl formamide (DMF), methyl ethyl ketone (MEK) and methyl ethyl ketone (diluent) in a drying chamber at 120 ° C to 130 ° C, An adhesive drying step of evaporating a component of toluene and blowing it to form a sticky sticky polyurethane (Urethane) adhesive layer;
In the process described above, a skin formed of only polyurethane (Poly Urethane), which is a polymer material, is formed on the surface of a release paper on which various engraved patterns are formed, and the skin formed of a sticky polyurethane A cloth transferring step of covering a fabric made of a woven fabric or a nonwoven fabric on the adhesive layer, and pressing the same with a pressing roller so that the polyurethane adhesive penetrates and adheres integrally with the fabric;
A raw material rolling process in which a polyurethane adhesive of a polyurethane adhesive layer formed on the surface of the skin in the fabric transferring step is integrally infiltrated into the fabric so that the skin and the fabric are integrally joined and wound in a roll state;
After aging for 12 hours in an aging chamber maintained at 80 ° C to 90 ° C in a rolled state in the far-end rolling process, residual DMF (dimethyl formamide), methyl ethyl ketone (MEK) , Aging the components of the diluent toluene (Toluene) completely evaporated and blowing them to cure the sticky sticky polyurethane (Urethane) adhesive so that the fabric and the skin are integrated;
A release paper separating step of separating the release paper from the surface of the skin in a state where the adhesive is completely cured in the aging step and the fabric and the skin are integrated,
An environmental hormone removing step for removing the environmental hormone, which is a harmful substance extracted from the skin fabric by blowing hot air while blowing hot and heating the skin fabric which is rolled up in a rolled state by blowing with a ventilator;
An environmental hormone screening process in which the skin material from which the environmental hormone has been removed in the environmental hormone removing process is heated to 180 ° C to 200 ° C and quenched to treat the environment hormone which is a residual harmful substance contained in the skin material, of; Wherein the method further comprises the steps of: The method according to claim 1,
In the environmental hormone removing process, the cloth and the skin are integrally joined together and the skin fabric wound in a rolled state is loosened. The cloth is heated while passing through a hot roller or a hot chamber at 180 ° C for 10 m per minute, and hot air is directly blown Environmentally friendly polyurethane skin fabrication characterized by blowing out environmental hormones, which are harmful substances including total volatile organic compounds (TVOC), toluene, and formaldehyde, extracted from blown skin fabrics by a blower Way. The method according to claim 1,
In the environmental hormone screening process, the surface of the skin having the environment hormone removed in the environmental hormone removing process is heated by indirect heat at 200 ° C, Wherein the surface tissue is densely recrystallized by quenching so that the environmental hormone which is a residual harmful substance contained in the skin is shielded so as not to leak to the outside.  The skin fabric, which is made of woven fabric or non-woven fabric, is joined with skin of 0.1 ~ 0.3mm thickness. The fabric is heated to 180 ℃ and hot air is sprayed to the hot roller and hot chamber at 10m / min. The surface of the skin fabric is heated by indirect heat at 200 ° C so that the environmental hormone, which is a harmful substance extracted from the skin fabric by direct blowing, is eliminated and the remaining residual harmful substance, the environmental hormone, is not leaked. Characterized in that it is heated and quenched to form a dense surface structure.

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