KR101806818B1 - Preparation method of denim material with thermal reversible property using phase change material and denim material with thermal reversible property prepared by the same - Google Patents

Abstract

The present invention relates to a method for manufacturing a denim material having a thermal reversible property by using a phase transition material, and the denim material having the thermal reversible property manufactured by the method and, more specifically, to a method for manufacturing the denim material by applying a cotton yarn to cannon, dyeing, marine, embroidery, weaving, embroidery, washing, mercerization, tentering, scaling, and inspection processes. A general cotton yarn is used as a warp yarn in the weaving process passing a process before the weaving process. PCM fiber and a mixed yarn are used as a weft yarn. The PCM fiber is obtained by microencapsulating the phase transition material (PCM); adding surface reinforced microcapsules, which are obtained by surface reinforcement with a high molecular substance, to a fiber spinning solution; and spinning the same. The mixed yarn is obtained by mixing and spinning the general cotton yarn in a weight ratio of 30-70:70-30. The present invention performs the weaving process by using the warp yarn and the weft yarn alone or mixing the warp yarn and the weft yarn with other fibers. The present invention inputs PCM microcapsules including a surface reinforced layer manufactured by the method to the spinning solution; obtains the PCM fiber by spinning the same; and obtains fabric by performing the weaving process with some or all of the weft yarn. The present invention manufactures the denim material in which the PCM material is stably mixed by passing the embroidery, washing, mercerization, tentering, scaling, and inspection processes. The denim material can be used as a high-grade material having cold and warmth sensations due to a latent heat feature of the PCM material.

Description

A method of manufacturing a denim material having a thermally reversible characteristic using a phase transition material and a denim material having a thermally reversible characteristic manufactured by the method are disclosed. by the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for manufacturing a denim material having a thermally reversible characteristic by using a phase change material (PCM), and by imparting cold and warm thermal reversible characteristics to a denim material, To a technique capable of improving the feel and enhancing durability.

Phase change material (PCM) refers to a substance that absorbs or emits a large amount of heat while changing phase (eg, liquid -> solid or solid -> liquid) without changing the temperature at a specific temperature. The heat that is absorbed or released is called latent heat. When applied to fiber materials, it gives cold feeling in hot weather like summer and gives warmth in cold weather like winter season.

In order to apply such a phase transition material to a fiber material, a technique of applying the microcapsule after coating with a polymer material has been developed and applied. The method of microencapsulation is not a special method of using emulsion polymerization in general, and a method of applying the microcapsule to a fiber has been heretofore applied directly, followed by drying or heat treatment. However, this method is not good in durability, and in particular, since the microcapsule is used in a portion in direct contact with the human body, the microcapsule has no air permeability and is not soft and thus not suitable for use in clothes.

In order to solve this problem, a variety of fibrous materials using PCM materials have appeared in various microcapsules by incorporating microcapsules into the spinning liquid during spinning and spinning them in various ways to incorporate microcapsules inside the fibers. Technologies have been proposed (for example, Korean Patent No. 10-1083817, Korean Patent Publication No. 10-2015-0113528, International Patent Publication No. WO 2002/24992, International Publication No. WO 2003/062513, etc.)

However, conventional techniques have proposed a method of incorporating a microcapsule into a fiber, but this is merely a technique applied to the process of producing ordinary regenerated fibers or synthetic fibers.

On the other hand, in order to manufacture the denim material, the cotton yarn is subjected to processes such as canning, dyeing, marine, fur, weaving, embroidery, washing, mercerization, tentering, reduction and inspection.

That is, in order to manufacture the denim material, it is subjected to physicochemical processes such as mercerization, tentering, and shrinking after various processes such as weaving using a cotton yarn.

Conventional techniques all refer only to the technology of incorporating PCM microcapsules into recycled fibers or synthetic fibers, since most of the processes are terminated by conventional techniques, It is difficult to think about durability.

Therefore, it is not easy to apply PCM characteristics to denim using recycled fiber or synthetic fiber.

In addition, although some technologies describe the process of mixing PCM microcapsules in the process of producing regenerated fibers such as rayon or acrylic yarn, the PCM microcapsules have a problem in that they are washed with time, The surface characteristics are weakened and the durability is degraded. Therefore, there is a great need to improve the surface properties.

<Other Prior Art Documents>

1. Korean Patent Publication No. 10-2044-0073987

SUMMARY OF THE INVENTION The present invention has been developed in view of the above circumstances of the prior art, and it is an object of the present invention to propose a technique for applying a phase change material (PCM) to a denim material to impart thermal, In the physical and chemical treatment according to the post-process, the function and the high quality of the material are maintained, and the technology for dramatically improving the durability of use for a long time is provided.

In order to achieve the above object,

A method of manufacturing a denim material by subjecting a cotton yarn to cannon, dyeing, marine, fur, weaving, embroidery, washing, mercerization, tentering,

In the weaving process, the surface-reinforced microcapsules obtained by using the general cotton yarn passed through the step before the weaving, microencapsulating the phase transition material (PCM) as a weft and surface-strengthening it with the polymer material, In a weight ratio of 30 to 70: 70 to 30, and using the blend yarn obtained by blending the PCM fiber and the plain yarn in a weight ratio of 30 to 70: 70 to 30, either alone or in combination with other fibers. The present invention also provides a method for manufacturing a denim material having the same.

In one embodiment of the present invention, the PCM fiber is characterized by being obtained by wet spinning or melt spinning.

In one embodiment of the present invention, the PCM fiber is characterized by being a rayon yarn or an acrylic yarn obtained by wet spinning.

In one embodiment of the present invention, the microcapsules are mixed in a range of 10 to 30 parts by weight based on 100 parts by weight of the spinning solution.

In one embodiment of the present invention, the phase change material is characterized by using a material having a melting temperature falling within a range of -20 to 90 ° C.

In one embodiment of the present invention, the phase transfer material is characterized in that a straight chain paraffinic hydrocarbon having 10 to 44 carbon atoms is used singly or as a mixture.

In one embodiment of the present invention, the phase change material may be selected from the group consisting of n-octanoic acid, n-heptanoic acid, n-hexanoic acid, n-tetracholic acid, n-hexadecane, n-pentadecane, n-tetradecane, and n-tridecane, which are selected from the group consisting of n-hexadecane, Or more.

In one embodiment of the present invention, in the microencapsulation of the phase change material (PCM), the phase transfer material is dissolved in a mixture of a polymer monomer and an emulsification aid, and the emulsion is emulsified by adding an initiator after being emulsified in water containing an emulsifier Wherein the polymeric resin formed by polymerization of the polymeric monomer forms microcapsules by forming a surface layer.

At this time, the polymer resin may be melamine resin, urea resin, gelatin, cellulose, epoxy, polyethylene or polyvinyl alcohol.

In one embodiment of the present invention, surface strengthening using the polymer material may be performed by mixing and dispersing the microcapsules of the phase change material in a polyurethane prepolymer to emulsify the polymer, adding a chain extender and an organosilane compound thereto, Thereby forming a surface-strengthening layer.

At this time, the obtained surface strengthening layer is formed of a surface polymer layer having a particle diameter of 5 to 30% of the particle diameter of the microcapsule particles.

In order to achieve the above object,

As a denim material manufactured by the above-described manufacturing method according to the present invention, a surface-reinforced microcapsule (PCM) obtained by microencapsulating a phase transition material (PCM) on a relatively large number of surfaces contacted with the skin, In a weight ratio of 30 to 70: 70 to 30, with a PCM fiber obtained by spinning and adding to a fiber spinning solution, and a mixed yarn obtained by blending the plain yarn at a weight ratio of 30 to 70: 70 to 30, either singly or in combination with other fibers. To provide a denim material.

The denim fabric produced by the method according to the present invention can be thermally reversible in cold and warm sensation by applying a phase transition material (PCM), and in particular, It is possible to maintain the functionality and high quality of the material in spite of the chemical treatment, and it is possible to remarkably improve the durability and the use for a long time.

A typical process for making denim materials consists of a series of processes that include cotton yarn, canvas, dyeing, marine, fur, weaving, fur, washing, mercerizing, tentering, shrinking and inspection.

Hereinafter, essential processes for manufacturing a denim material will be briefly described.

First, the cannon is a step of preparing dyeing, and winding a cotton yarn into a rope shape with a uniform tension and a length equal to the number of rolls according to the product standard.

The dyeing is a step of dyeing the yarn wound in the rope shape in a predetermined color.

The marine is a preparation process of weaving as a process of reeling the yarn dyed in a rope shape and winding it in a sheet form in accordance with the product standard.

The call portion is a process of feeding the grass to the surface of the yarn in order to facilitate the weaving of the fabric in the weaving preparation process.

The weaving is a process in which the weft is physically expressed in the form of a fabric by staining the weft with a warp sloped to the grass.

It is a process to clean and uniform the fabric surface by burning the impurities and dust on the surface of the fabric by passing the flame of the gas burner at a high speed through the fabric.

The water washing is a step of removing the paste adhering to the surface of the fabric in order to enhance permeability of various chemicals in the subsequent process and to stabilize the physical properties.

The mercerization is a process of forcing the cotton fiber to swell by using a sodium hydroxide solution to produce a glossy touch and a smooth touch on the surface of the denim fabric. After the mercerization, the pH of the fabric is neutralized by using formic acid or the like.

The tentering is a process of setting the shape of the polyurethane to the intended physical property by hot hot air and imparting additional characteristics to the fabric by using various chemicals.

The shrinkage is due to the fact that the cotton fabric is swollen and shrunk after flushing. Therefore, in order to prevent such a shrinkage, the physical process is performed in advance. Skewing is performed in the horizontal direction and sanforizing is performed in the vertical direction.

The inspection is a final inspection of the product to check whether it meets the fiber quality standard.

As shown in this manufacturing process, in order to manufacture the denim material, the fabric is manufactured by weaving the warp yarn and general weft yarn with dyeing, marine, and furrow, and thereafter, the subsequent process of several stages such as morne, washing, mercerization, tentering, It goes through.

The present invention intends to provide a technique capable of imparting functional characteristics of cold and warm sensation by incorporating a PCM material in a denim manufacturing method through such a process, and maintaining physical characteristics and durability.

For this purpose, in carrying out the above-described manufacturing process, the present invention uses a plain cotton yarn that has undergone the above-mentioned weaving step as a warp yarn, microencapsulated a phase change material (PCM) as a weft yarn, The surface reinforced microcapsules are added to the fiber spinning solution, and the blend yarn obtained by blending the PCM fibers obtained by spinning with a general cotton yarn at a weight ratio of 30 to 70: 70 to 30 is weighed singly or in combination with other fibers And a thermally reversible characteristic of the denim material.

Hereinafter, the above-described features of the present invention will be described in detail.

In the present invention, as the warp yarns, the yarns before the weaving are used, that is, regular yarns passed through regular yarn, dyeing, marine yarns and yarns.

As the weft, by using a material containing a phase change material (PCM), a phase transition material is mixed into a weft yarn widely used on a surface contacting with the skin, thereby imparting a cold, warm, and thermally reversible characteristic.

In this case, when the phase transition material is mixed into the weft yarn, microcapsules of the phase transition material are used. However, the microcapsule alone may have weak durability and washing durability against the physicochemical treatment according to the subsequent process. . In the present invention, the surface reinforced fiber is referred to as PCM fiber.

In the present invention, the PCM fiber can be produced by wet spinning or melt spinning.

More specifically, the PCM fiber may be rayon yarn or acrylic yarn obtained by wet spinning. In the present invention, a PCM material (specifically, a surface-reinforced microcapsule containing a PCM material) is added to the production process of the rayon yarn in the present invention. It is preferable to prepare PCM fiber by mixing.

At this time, in the case of spinning fibers using the surface-reinforced microcapsule, it is preferable that the surface-reinforced microcapsules are mixed in a ratio of about 10 to 30 parts by weight based on 100 parts by weight of the spinning solution to impart cold and warm feeling.

The thus obtained PCM fiber is blended with a general cotton yarn to obtain a blend yarn. In this case, the blend ratio is preferably 30 to 70: 70 to 30 by weight of the blend of PCM fiber and plain cotton yarn.

Hereinafter, a process of microencapsulating the phase transition material and a process of performing the surface strengthening treatment will be described.

First, the process of microencapsulation will be described. The phase transition material is added to a mixture of a polymer monomer and an emulsifying aid to dissolve it, and the resulting mixture is emulsified in water containing an emulsifying agent, followed by polymerization with an initiator.

In the present invention, 100 parts by weight of a phase transition material is dissolved in a mixture of 100 to 180 parts by weight of a polymeric monomer and 10 to 20 parts by weight of an emulsifying aid, emulsified in 800 to 1000 parts by weight of water containing 1 to 10 parts by weight of an emulsifier, 0.1 to 5 parts by weight is added, followed by a polymerization reaction to prepare an emulsion-state microencapsulated phase change material.

In the present invention, a phase change material (PCM) refers to a material that absorbs or emits heat energy while changing from a solid phase to a liquid phase or from a liquid phase to a solid phase within a certain temperature range.

Such phase transition materials can be selected from known ones, and specifically, materials having a melting temperature within a range of -20 to 90 ° C can be used.

More specifically, the phase transition material is preferably a linear paraffinic hydrocarbon having 10 to 44 carbon atoms, either singly or as a mixture. Specific examples thereof include n-octanoic acid, n-heptanoic acid, n-hexanoic acid, n-octadecane, n-heptadecane, n-hexadecane, n-pentadecane, n-tetradecanoic acid, Decane, and n-tridecane, may be used.

As the polymer resin that is polymerized by the polymer monomer and forms the surface layer of the phase change material, for example, melamine resin, urea resin, gelatin, cellulose, epoxy, polyethylene or polyvinyl alcohol can be used as the polymer resin. And in the field to which the present invention belongs, any known polymer resin that generally coats a PCM material can be used without limitation.

The emulsifying aid is added to maintain a stable emulsified state. For example, long-chain alcohols such as cetyl alcohol or stearyl alcohol may be used, but the present invention is not limited thereto. , Which are known in the art to be used for microencapsulation of PCM materials in general, can be used without limitation.

The emulsifier is preferably an anionic surfactant, but is not limited thereto. Specific examples of the anionic surfactant include carboxylic acid salts, sulfonic acid salts, sulfuric acid ester salts and phosphoric acid ester salts. The carboxylic acid salt may be a higher fatty acid alkali salt, an N-acryloyl acid salt, an alkyl ether carboxylic acid salt, an acylated peptide or the like. The sulfonic acid salt may include an alkyl sulfonate, an alkylbenzene and an alkyl amino acid salt, an alkyl naphthalene sulfonate, An alkyl ether sulfate, an alkyl aryl ether sulfate, an alkylamide sulfate, and the like can be used as the sulfuric acid ester salt. Examples of the phosphoric acid ester salt include alkyl phosphates, alkyl ether phosphates, alkyl aryl ether phosphates, and the like. Can be used.

As a method of emulsifying the mixture, for example, a homogenizer or an ultrasonic wave may be used.

Such initiators include, for example, potassium persulfate (KPS), aminopropanesulfonic acid (APS), azobismethylpropionate

Azobismethylpropionitrile (AIBN), and the like may be used, but the present invention is not limited thereto.

The reaction temperature during the emulsion polymerization is preferably from about 50 to 80 캜, preferably about 70 캜 for 1 to 8 hours, preferably about 5 hours. By such a reaction, a PCM microcapsule having a polymer resin layer formed on its surface can be obtained.

Such a PCM microcapsule has a certain degree of durability because a polymer resin layer is formed on its surface, and when it is mixed with a spinning solution to spin the fiber, it can be used as a general fiber material.

However, in order to be used as a denim material, it is subjected to a subsequent step of several steps as described above. In this case, the physical and chemical treatment is subjected to severe physical processes. In this process, the surface of the PCM microcapsule is weakened by physical and chemical treatment only The durability and the durability of the laundry may be weakened in the course of use, and reliability of the fiber quality may deteriorate.

In the present invention, the PCM microcapsules obtained are further treated to enhance the surface characteristics in order to solve this problem.

In the present invention, a urethane coating layer is formed on the surface of the obtained PCM microcapsule for enhancing the surface property.

There have been some technologies that suggest that urethane or epoxy layers are formed on the outer layer of microcapsules. However, most of these techniques are to increase the size of the microcapsules to increase the surface area, thereby improving latent heat characteristics and cold / And are not related to improving the durability in the subsequent process of physico-chemical processing in manufacturing denim materials. In addition, existing technologies have a disadvantage in that they are easily separated due to weak bonding force between urethane and epoxy which form the outer layer of the microcapsule.

The present invention relates to a technique for stably imparting intrinsic properties of a PCM material to a denim material, and is characterized by forming a rigid and stable urethane surface reinforcing layer by using a polymer material on the surface of the PCM microcapsule.

In the present invention, a specific method of surface-strengthening the polymer material includes mixing and dispersing the PCM microcapsules in a polyurethane prepolymer to emulsify the polymer, mixing a chain extender and an organosilane compound therein, Lt; / RTI &gt;

The polyurethane prepolymer is prepared by first reacting a mixture containing a polyol and an isocyanate compound to prepare a prepolymer having a degree of polymerization. The polyol includes polyester polyol, carbonate polyol and the like having a number average molecular weight of about 300 to 5,000 As the isocyanate, a diisocyanate compound containing two isocyanate groups may be selected from toluene diisocyanate, diphenylmethane diisocyanate, xylene diisocyanate, isophorone diisocyanate, hexane diisocyanate, and hexamethylene diisocyanate. .

At this time, in order to accelerate the reaction, a catalyst used in ordinary polyurethane production may be added within the usual range of addition, for example, dibutyltin dilaurate may be used.

Thereafter, the prepolymer can be prepared by neutralizing the reaction product using a predetermined neutralizing agent.

The PCM microcapsules are mixed with the prepolymer thus prepared and polymerized to obtain microcapsules having the surface-strengthening layer formed thereon.

In this case, the prepolymer and the PCM microcapsules are mixed at a predetermined ratio, and a chain extender and an organosilane compound are added to the reaction system to polymerize the prepolymer on the surface of the PCM microcapsule, whereby the surface reinforcing layer is firmly and stably formed Microcapsules can be obtained.

The mixing ratio of the prepolymer and the PCM microcapsule may be 50 to 200 parts by weight based on 100 parts by weight of the prepolymer solution.

The chain extender may be a diamine or a diol compound, and a known compound may be used. The amount of the chain extender may be about 1 to 10 parts by weight based on 100 parts by weight of the prepolymer solution.

The organosilane compound is preferably a reactive organosilane compound. Examples of the organosilane compound include alkoxysilane, aminosilane, epoxy silane, methacrylate silane, and vinyl silane. More specifically, trimethoxysilane, trie Ethoxy silane, triacetoxy silane and the like can be used.

In the present invention, the organosilane compound enhances the binding force between the outer layer polymer of the microcapsule and the outer layer polymer formed by polymerization of the prepolymer, and is used in a range of about 0.5 to 10 parts by weight based on 100 parts by weight of the prepolymer solution .

The reaction for forming the surface strengthening layer by the chain extender and the organosilane compound may be performed using the same reaction system, and the reaction temperature may be about 50 to 100 ° C. and the reaction time may be about 1 to 8 hours.

The microcapsules obtained by such a process have a solid surface-strengthening layer made of a polyurethane polymer resin, and the surface-strengthening layer preferably has a thickness of about 5 to 30% of the thickness of the microcapsules . If the thickness of the thickness layer is less than 5%, the durability improvement effect is insignificant with respect to the physicochemical treatment according to the subsequent process. If the thickness layer is more than 30%, there is a problem that the cold / It is preferable to control the reaction so as to be maintained.

The PCM microcapsule having the surface strengthening layer thus obtained is put into a spinning solution, and the resultant is spun to obtain a PCM fiber. The PCM fiber is then woven using a part or all of the weft yarn to obtain a fabric, It is possible to manufacture a denim material in which a PCM material is stably incorporated by carrying out a process of embossing, washing, mercerizing, tentering, shrinking and inspection. Such a denim material is a high quality material having cold sensibility due to the latent heat characteristic of the PCM material There are advantages that can be utilized.

Claims (12)

A method of manufacturing a denim material by subjecting a cotton yarn to cannon, dyeing, marine, fur, weaving, embroidery, washing, mercerization, tentering,
In the weaving process, the surface-reinforced microcapsules obtained by using the general cotton yarn passed through the step before the weaving, microencapsulating the phase transition material (PCM) as a weft and surface-strengthening it with the polymer material, In a weight ratio of 30 to 70: 70 to 30, and using the blend yarn obtained by blending the PCM fiber and the plain yarn in a weight ratio of 30 to 70: 70 to 30, either alone or in combination with other fibers. Wherein the denim material has a surface roughness of at least 10 mm.
The method according to claim 1, wherein the PCM fiber is obtained by wet spinning or melt spinning.
The method of manufacturing a denim material according to claim 1, wherein the PCM fiber is a rayon yarn or an acrylic yarn obtained by wet spinning. The method according to claim 1, wherein the microcapsules are mixed in a range of 10 to 30 parts by weight based on 100 parts by weight of the spinning solution.
[2] The method of claim 1, wherein the phase change material is a material having a melting temperature within a range of -20 to 90 [deg.] C.
The method of manufacturing a denim material according to claim 1, wherein the phase change material is a linear paraffinic hydrocarbon having 10 to 44 carbon atoms, either singly or in combination.
2. The method of claim 1, wherein the phase change material is selected from the group consisting of n-octanoic acid, n-heptanoic acid, n-hexanoic acid, n-tetracholic acid, n- , n-nonadecane, n-octadecane, n-heptadecane, n-hexadecane, n-pentadecane, n-tetradecane and n-tridecane Wherein the thermally reversible characteristic of the denim material is the same as that of the denim material.
[3] The method of claim 1, wherein the phase transfer material (PCM) is microencapsulated by dissolving the phase transfer material in a mixture of a polymer monomer and an emulsification aid, and emulsifying the polymer by adding an initiator after emulsifying the mixture in water containing an emulsifier. Characterized in that the polymer resin formed by polymerization is microencapsulated so as to form a surface layer.
9. The method of claim 8, wherein the polymer resin is a melamine resin, urea resin, gelatin, cellulose, epoxy, polyethylene or polyvinyl alcohol.
[3] The method of claim 1, wherein the surface strengthening using the polymer material is performed by mixing and dispersing the microcapsules of the phase change material in a polyurethane prepolymer to emulsify the polymer, mixing a chain extender and an organosilane compound, Wherein the thermally reversible layer is formed of a thermally reversible thermosetting resin.
[Claim 11] The method according to claim 10, wherein the obtained surface-strengthening layer is formed by a surface polymer layer having a particle diameter of 5 to 30% of the particle diameter of the microcapsule particles.
A denim fabric manufactured by the manufacturing method according to claim 1, wherein a surface-reinforced microcapsule obtained by microencapsulating a phase transition material (PCM) on the surface of a relatively large number of surfaces contacting the skin and surface-strengthening the surface with a polymer material Wherein the blend yarn is obtained by blending a PCM fiber obtained by spinning with a fiber spinning solution and a general cotton yarn in a weight ratio of 30 to 70: 70 to 30, either singly or in combination with other fibers. Has a denim material.