KR101795293B1 - Functional cellulose composite - Google Patents

Abstract

Disclosed is a functional cellulose composite material comprising a compress-molded plate of a non-woven fabric of a functional cellulosic composite fiber, and a cover member formed on at least one surface of the compress-molded plate, and more specifically, a functional cellulose composite material which includes a base fabric formed of cotton fibers in which a flame-retardant binder is adhered to the surface, and a cover member formed on at least one surface of the fabric.

Description

Functional cellulose composite < RTI ID = 0.0 >

The present invention relates to a functional cellulose composite material, and more particularly, to a functional cellulose composite material having excellent flame retardancy and antimicrobial properties and reinforced strength and elasticity.

Natural fiber is a natural fiber obtained from minerals. It is classified into vegetable fiber, animal fiber, and mineral fiber depending on the raw material. Among them, the vegetable fiber is mainly composed of a cellulose component. Specifically, the vegetable fiber is composed of a seed fiber such as cotton or fenugreek, a bast fiber such as flax, jute or hemp, a vein fiber such as Manila hemp, New Zealand hemp, And the like.

Such a cellulose-based vegetable fiber is a fiber material which can be easily found in the vicinity of our life in a form closely related to human life.

As a representative of cellulosic fiber, natural cotton has been used as a warming material for winter such as clothing and bedding since ancient times and is known as a fiber having excellent heat insulation, thermal insulation, soundproofing and sound absorption function.

Cellulosic fibers have no harmful components in the human body and do not cause environmental pollution. They also absorb carbon dioxide and release oxygen through plant photosynthesis.

However, the cellulose-based fiber is weak in flame retardancy and flame retardancy and hygroscopic, and is weak in moisture, easy to reproduce microorganisms and insects, is bulky and lacks bearing capacity, and is limited to clothing, bedding, There was a problem.

The object of the present invention was developed in consideration of the above technical background, and it is an object of the present invention to maximize the flame retardancy, moisture-proofing, anti-fogging and anti-insecting performance while enhancing the environmental friendliness, heat insulation, thermal insulation and sound absorption function of the cellulose- The present invention provides a functionalized cellulose composite material.

According to an aspect of the present invention, there is provided a functionalized cellulose composite material of the following embodiments.

A first embodiment includes a press-molded plate of a non-woven fabric of a functional cellulosic composite fiber and a cover member formed on at least one surface of the press-molded plate,

30 to 50 parts by weight of the kenaf fiber having been subjected to the flame-retarding treatment of the functional cellulose conjugated fiber nonwoven fabric, 30 to 50 parts by weight of the flame-retarded cotton fiber, and 5 to 30 parts by weight of the low-

Wherein the flame-retarded kenaf fiber and the flame-retarded cotton fiber have a flame-retardant binder attached to each fiber surface,

The content of the flame-retardant binder is 20 to 40 parts by weight based on 100 parts by weight of the pressure-

Wherein the flame-retardant binder comprises 5 to 35 parts by weight of starch, 5 to 25 parts by weight of a phosphorus-based flame retardant, 1 to 10 parts by weight of a wetting agent, 1 to 10 parts by weight of a polyborate, and 3 to 15 parts by weight of a binder,

Wherein the cover member is a laminated product of one or more selected from the group consisting of a nonwoven fabric, a veneer, a polymer film, an aluminum sheet, and a high strength fiber fabric.

A second embodiment of the present invention is a fabrication method comprising the steps of: providing a fabric having a flame-retardant binder formed of cotton fibers adhered to a surface; And

And a cover member formed on at least one side of the fabric,

The content of the flame-retardant binder is 50 to 130 parts by weight based on 100 parts by weight of the fabric,

Wherein the flame-retardant binder comprises 5 to 35 parts by weight of starch, 5 to 25 parts by weight of a phosphorus-based flame retardant, 1 to 10 parts by weight of a wetting agent, 1 to 10 parts by weight of a polyborate, and 3 to 15 parts by weight of a binder,

Wherein the cover member is a laminated product of one or more selected from the group consisting of a nonwoven fabric, a veneer, a polymer film, an aluminum sheet, and a high strength fiber fabric.

The third embodiment is, in the first embodiment or the second embodiment,

The high strength fiber fabric is a functional cellulose composite material which is woven with one or more fibers of glass fiber, carbon fiber, liquid crystal polyester (LCP) fiber, and aramid fiber.

The functional cellulose composite material according to an embodiment of the present invention maximizes the flame retardancy by using a flame-retardant binder containing both starch, phosphorus-based flame retardant, and polyboric acid salt to greatly improve the vulnerability of the cellulose fiber and improve the antibacterial property.

Further, by using the low-melting-point polyester fiber together with the cellulose-based fiber, it is possible to provide a functional cellulose composite material in which the dimensional stability as a weak point of the conventional cellulose fiber sheet is secured, the volume reduction rate is reduced, and the strength and elasticity are reinforced.

In addition, it is possible to impart a decorative effect to cellulose-based fabrics in addition to mechanical strength, environment friendliness, heat insulation, heat insulation and sound absorbing function, as well as flame retardance, longevity and anticorrosive properties. .

Hereinafter, preferred embodiments of the present invention will be described in detail. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the configurations shown in the embodiments described herein are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents And variations are possible.

The functional cellulose composite material according to one aspect of the present invention includes a compression-molded plate of a non-woven fabric of a functional cellulose composite fiber and a cover member formed on at least one surface of the compression-

30 to 50 parts by weight of the kenaf fiber having been subjected to the flame-retarding treatment of the functional cellulose conjugated fiber nonwoven fabric, 30 to 50 parts by weight of the flame-retarded cotton fiber, and 5 to 30 parts by weight of the low-

Wherein the flame-retarded kenaf fiber and the flame-retarded cotton fiber have a flame-retardant binder attached to each fiber surface,

The content of the flame-retardant binder is 20 to 40 parts by weight based on 100 parts by weight of the pressure-

Wherein the flame-retardant binder comprises 5 to 35 parts by weight of starch, 5 to 25 parts by weight of a phosphorus-based flame retardant, 1 to 10 parts by weight of a wetting agent, 1 to 10 parts by weight of a polyborate, and 3 to 15 parts by weight of a binder,

The cover member is at least one kind of laminate selected from the group consisting of a nonwoven fabric, a veneer, a polymer film, an aluminum sheet, and a high strength fiber fabric.

The kenaf fiber is a type of bast fiber known as 洋 麻 and is one of the world's three major fiber crops and has attracted attention as a plant resource for various biomaterials. In addition, the kenaf fiber has a high growth rate and a large amount of CO 2 uptake, as well as high-quality paper and environmentally friendly wallpaper, architectural board, bio-plastic, automobile frame, functional clothing, charcoal, feed, oil adsorbent, mushroom / Bio-ethanol and so on, and it is a crop that has attracted great attention in the world in recent years.

The cotton fiber is a representative example of the seed parent fiber, and a degreased cotton, recycled cotton or the like can be used, and moisture can be regulated to within 5%.

At this time, by increasing the content of the kenaf fiber and the coconut fiber in the cellulose fiber, the strength and elasticity can be increased, and the warmth can be improved by increasing the content of the cotton fiber.

In addition, the functional cellulose conjugated fiber nonwoven fabric of the present invention further comprises low-melting-point polyester fibers together with the aforementioned cellulose-based fibers.

The low melting point polyester fiber is a polyester fiber having a melting point of 100 to 200 占 폚, specifically 100 to 150 占 폚, more specifically 110 to 130 占 폚.

The low-melting-point polyester fiber is a material made by co-spinning a general polyethylene terephthalate (PET) fiber and a modified low-melting-point PET. The low melting point component is melted by heat treatment at a melting point or higher, It is possible to play a role of a molding agent that secures dimensional stability through the process of impregnating the fibers between the fibers and binding them together.

The low melting point polyester fiber may have a fineness of 10 to 20 deniers and a fiber length of 25 to 100 mm.

According to one embodiment of the present invention, the low melting point polyester fiber may be a low melting point flame retardant polyester fiber. Such a low melting point flame retardant polyester fiber may be prepared by mixing a general flame retardant and a low melting point polyester resin in the production of a low melting point polyester fiber, followed by melt spinning, or after obtaining a low melting point polyester fiber, .

The kenaf fiber, which is flame-treated in the functional cellulose composite material, is contained in an amount of 30 to 50 parts by weight, more specifically 33 to 47 parts by weight. When the content of the kenaf fiber is less than 30 parts by weight, Can be lowered. If the amount is larger than 50 parts by weight, the insulating property may be deteriorated.

The flame-treated cotton fibers are contained in an amount of 30 to 50 parts by weight, and more specifically 33 to 47 parts by weight. When the content of the cotton fibers is less than 30 parts by weight, the thermal insulation may be deteriorated. In case of large size, the resulting functional cellulosic composite material may be sagged downward by gravity.

When the content of the low melting point polyester fiber is less than 10 parts by weight, the flame retarding effect is improved. However, when the content of the low melting point polyester fiber is in the range of 5 to 30 parts by weight, If the amount is more than 30 parts by weight, the cost increases, and since the polyester fiber is vulnerable to fire, the flame retardant performance may be reduced.

According to one embodiment of the present invention, the cellulose fiber may further include kenaf fiber and cotton fiber as well as flame-retarded coconut fiber.

The coconut fiber is a kind of fruit fiber, also called coir, which is not very strong but relatively resilient and light, and has a property that it does not decay well in water and especially in seawater, so that the filler of cords, mattresses, , Broomsticks, and the like.

The flame-retarded coconut fiber is contained in an amount of 5 to 30 parts by weight, specifically 10 to 28 parts by weight. When the content of the coconut fiber is less than 5 parts by weight, the stability of the form may be deteriorated. If it is large, the insulating property may be deteriorated.

According to an embodiment of the present invention, the kenaf fiber and the coconut fiber independently have a fineness of 20 to 100 denier, can be cut to a length of 5 to 20 cm, and the water content can be adjusted to 7% or less .

In general, synthetic fibers are melted and melted at a high temperature above the melting point, while cellulosic fibers can be carbonized at high temperatures to prevent fire, and kenaf and coconut fibers can maintain the shape of fiberboard, It is possible to prevent the sagging phenomenon and maintain the shape of the fiberboard.

The pressure-sensitive adhesive sheet of the cellulose composite fiber nonwoven fabric may be formed into a nonwoven fabric by using the flame retarded kenaf fiber, the flame retarded cotton fiber, and the low melting point polyester fiber described above and then formed by a heating and pressing method . Of course, the flame-treated coconut fiber may be optionally further included as described above.

The low-melting-point polyester fiber may also be subjected to flame-retarding treatment with a flame-retardant binder.

The flame-retardant binder is adhered to each surface of the cellulose composite fiber forming the nonwoven fabric in the press-molded plate, that is, the kenaf fiber, and the cotton fiber to bind to the fibers or to fix the fibers. Alternatively, when the flame-treated coconut fiber is further included, a flame-retardant binder is adhered to the surface of the coconut fiber.

The flame-retardant binder includes starch, a phosphorus-based flame retardant, a polyborate, a wetting agent, and a binder.

The starch molecular formula (C ₆ H ₁₂ O ₆₎ as a natural polymer, a polymerization number of glucose molecules are α- by a glycosidic linkage to a carbohydrate _n, contains a lot or the like of the plant seeds or roots. Examples of the starch include corn starch, potato starch, and the like.

The starch binds with the phosphorus flame retardant in the flame-retardant binder to form phosphate starch (starch phosphate), thereby maximizing the flame retarding effect.

The phosphorus flame retardant is thermally decomposed to form phosphoric acid, and phosphoric acid acts as a dehydration catalyst in the burning material to increase the amount of char. Some polymers have oxygen atoms contained in the polymer structure and form carbonaceous char when pyrolyzed. The generation of this char reduces the amount of fuel that can be combusted. Therefore, the phosphorus flame retardant makes a thick barrier by using a char on the surface of the burning molecule to block the heat, thereby performing a flame retarding function to turn off the flame.

According to an embodiment of the present invention, the phosphorus flame retardant may be selected from the group consisting of APP (Ammonium Polyphosphate), CG-P (Red Phosphate), TCEP (Tris ), TEP (Triethyl Phosphate), Resorcinol di phosphate (RDP), and TCP (Tricresyl Phosphate).

Next, the polyboric acid salt plays a role of insect repellent and antiseptic as well as a flame retardant function, and a specific example thereof is sodium polybromate.

The lubricant serves to help the moisture of the powder such as starch, which is another component of the flame-retardant binder, to contact well, and the wetting agent is preferably a hydrophilic additive having two or more OH or COOH, Examples thereof include glycols such as glycerin and propylene glycol; sugar alcohols such as sorbitol and xylitol; and organic acids such as citric acid, succinic acid and oxalicacid. More specifically, as the wetting agent, OT-75 manufactured by Miwon Company and Troysol LAC manufactured by Troy can be used.

The binder serves to fix starch, phosphorus flame retardant, and polyboric acid salt on each fiber of the composite fiber board. Examples of the binder include an acrylate resin, a polyacetate resin, a urethane resin, a melamine resin, and an epoxy resin One or more species can be used.

The flame-retardant binder comprises 5 to 35 parts by weight, particularly 10 to 30 parts by weight of starch, the phosphorus-based flame retardant comprises 5 to 25 parts by weight, particularly 8 to 20 parts by weight, the wetting agent is 1 to 10 parts by weight, In particular 2 to 8 parts by weight, and the polyborate salt may comprise 1 to 10 parts by weight, in particular 3 to 8 parts by weight, and 5 to 15 parts by weight, in particular 7 to 12 parts by weight, of the binder have.

Further, the flame-retardant binder may further contain various additives as long as it does not affect the flame retardant properties, and examples thereof may include water repellent agents, antibacterial agents, aromatic agents, and the like.

The content of the flame-retardant binder may be 20 to 40 parts by weight, particularly 25 to 35 parts by weight, based on 100 parts by weight of the compression-molded plate. When the content of the flame-retardant binder satisfies this range, the effect of semi-flame-retardant performance can be exhibited. Semi-incombustibility performance is one of the methods of expressing flame retardant performance according to ISO5660-1 standard through cone calorie test and toxicity test. The whole stage is flame retardant, semi-fireproof, non-fireproof. This is divided into three stages.

The cover member is formed on at least one surface of the compression-molded plate of the functional cellulose composite fiber nonwoven fabric of the present invention to impart the mechanical strength of the functional cellulose composite material to improve impact resistance and deformation resistance by external force, It is possible to provide convenience of management while utilizing the sound absorption function, and to provide a decorative external beauty feeling.

The cover member may be one or more kinds of laminated materials selected from the group consisting of a nonwoven fabric, a veneer, a polymer film, and a high strength fiber fabric.

The nonwoven fabric may be produced by various natural fibers and synthetic fibers to the extent that the purpose of the present invention is satisfied. The veneer is made of natural wood as thin as paper, and it can feel classy because it has the texture and color of natural wood. It is a finishing material that can produce various atmosphere according to the kind of wood. In addition, the polymer film may also be a film produced using various polymer resins to the extent that it is compatible with the object of the present invention.

Further, the high-strength fiber cloth means a fabric woven from one or more kinds of high-strength fibers of glass fiber, carbon fiber, liquid crystal polyester fiber, and aramid fiber. At this time, the liquid crystalline polyester fiber is a wholly aromatic polyester fiber obtained by polymerizing and spinning by substituting aromatic compounds for both the bifunctional alcohol and the organic acid which are the monomers of the polyester fiber. When the polymer chain becomes rigid, Since it is a type of LCP (Liquid Crystal Polymer) that shows the properties of liquid crystal, it can be easily fabricated with high strength and high elastic modulus fibers because it can easily arrange the molecular chains along the fiber axis during fiber formation. Examples of such liquid crystalline polyester fibers include, but are not limited to, Vectran, Vectra, and the like.

According to another aspect of the present invention, there is provided a method for producing a functionalized cellulose composite material,

Flame retarding the kenaf fiber and the cotton fiber with a flame-retardant binder liquid containing starch, a phosphorus flame retardant, a polyborate, a wetting agent, and a binder, respectively;

30 to 50 parts by weight of the flame retarded kenaf fiber, 30 to 50 parts by weight of the flame retarded cotton fiber, and 5 to 30 parts by weight of the low melting point polyester fiber.

Heating the flame-retardant nonwoven fabric;

Molding the heated flame-retardant nonwoven fabric to prepare a press-molded plate of the nonwoven fabric of the functional cellulosic composite fiber; And

And forming a cover member on at least one surface of the press-molded plate.

A method for manufacturing a functional cellulose composite material according to an embodiment of the present invention will be described.

First, in the step of first flame-retarding the cellulose-based composite fiber including the kenaf fiber, the cotton fiber and the low-melting-point polyester fiber, the fibers may be separately flame retarded and mixed, To prepare a cellulose-based conjugated fiber and subject it to flame-retarding treatment. The same is true even when the fiber further comprises coconut fiber.

The flame-retarding treatment is carried out by applying the individual fibers or the mixed cellulose-based composite fibers to the cellulose fibers by a conventional method such as being carried out by immersion, spraying, knife coating, or laminating using the above-mentioned flame retardant binder solution, Optionally, dehydrating or drying it.

In this case, the flame-retardant binder liquid may contain 1 to 10 parts by weight of a first flame retardant component including 15 to 35 parts by weight of starch, 5 to 25 parts by weight of phosphorus-based flame retardant, 1 to 10 parts by weight of a wetting agent, and 10 to 30 parts by weight of water, Preparing a flame retardant solution by mixing a second flame retardant component containing 30 to 40 parts by weight of water; And mixing the flame retardant liquid with a binder.

Specifically, a mixture composed of 15 to 35 parts by weight of starch, 5 to 25 parts by weight of a phosphorus-based flame retardant, 1 to 10 parts by weight of a wetting agent, and 10 to 30 parts by weight of water is aged for 24 hours so that the starch is dissolved in phosphoric acid The ingredients are prepared (one step process). Thereafter, a flame retardant liquid prepared by mixing 1 to 10 parts by weight of a polyborate salt and 30 to 40 parts by weight of water with the first flame-retardant component is prepared (2-step process). A flame retardant binder liquid may be prepared by mixing the flame retardant liquid with at least one binder selected from the group consisting of an acrylate resin, a polyacetate resin, a urethane resin, a melamine resin and an epoxy resin (three step process).

Silicone oil may be added to the flame-retardant binder solution to reduce the hygroscopic function of the produced composite fiber board.

The method of applying the flame-retardant binder liquid to the non-woven fabric, that is, the step of performing the flame-retardant treatment, can be applied without limitation as long as it is a general application method. Specifically, the method can be applied by immersion, spraying, knife coating or laminating. The binder binds and adheres to the fibers of the nonwoven fabric.

In this case, the ratio of the flame retardant binder solution to the cellulose composite fiber may be 100 to 150 parts by weight based on 100 parts by weight of the total weight of the cellulose composite fibers, and the solid ratio after drying of the flame retardant solution may be 20 to 40 parts by weight have.

Thereafter, a flame-retardant nonwoven fabric comprising 30 to 40 parts by weight of the flame-retarded kenaf fiber, 30 to 50 parts by weight of the flame-retarded cotton fiber, and 10 to 30 parts by weight of the low melting point polyester fiber is prepared. At this time, it is possible to further include the selectively flame-treated coconut fiber as described above.

The flame-treated kenaf fiber, the flame-retarded cotton fiber, and the low-melting point polyester fiber can be homogeneously mixed to prepare the cellulose composite fiber. The method of homogeneously mixing these fibers is a method using air vortex But is not limited thereto.

Next, a flame-retardant nonwoven fabric is prepared using the prepared cellulose composite fiber.

The composite fiber nonwoven fabric is obtained by laminating the homogeneous composite fibers with the homogeneously mixed cellulose composite fiber. The nonwoven fabric may be produced by a conventional nonwoven fabric manufacturing method.

In this step, the non-woven fabric is dried to remove volatile components and moisture remaining in the non-woven fabric, and heat-treated at a temperature not lower than the melting point of the low melting point polyester fiber to melt the low melting point polyester to form another nonwoven fabric And the dimensional stability can be ensured through the process of mutually bonding the fibers. As a result, the volume reduction ratio of the finally obtained composite fiber board can be reduced, and strength and elasticity can be reinforced.

For this purpose, it is possible to use a plurality of tenter groups whose temperature is raised stepwise from 100 ° C. to 140 ° C. of the flame-retardant nonwoven fabric. By adjusting the temperature rising speed and the drying time, the flame- The degree of impregnation into other nonwoven fabrics can be controlled.

At this time, the nonwoven fabric is dried at 100 ° C., and when the temperature rises to 140 ° C., the low melting point polyester fiber melts and permeates between the other cellulose fibers to bind these fibers.

In this case, if heated to a too high temperature, the low melting point polyester fiber may melt and flow, and the moisture content of the cellulose fiber passing through the tenter may be less than 10%, which may cause the nonwoven fabric to be broken in the drying step. The remaining moisture is naturally dried during the aging process of the finished fiberboard.

According to another embodiment of the present invention, the flame-retardant nonwoven fabric may further be subjected to additional flame-retarding treatment depending on the degree of flame retardancy to be obtained before the heat treatment. This can maximize the overall and uniform flame retardancy in the nonwoven fabric through such a process as long as the above-described flame-retarding binder liquid can be treated by coating the flame-retardant nonwoven fabric.

Thereafter, the heated flame-retardant nonwoven fabric is formed.

The forming step may be a conventional method for obtaining a predetermined type of fiberboard, for example, a forming method using a roller or a forming method using a press.

The forming by the roller may be carried out by compressing in stages using one or more shaping rollers maintained at a temperature of 80 to 150 캜.

According to one embodiment of the present invention, a composite fiber board for various applications can be provided depending on the degree of compression using the composite fiber nonwoven fabric. Specific examples thereof include a filler material having a thickness of about 10 to 50 mm, a thickness of 1 to 5 mm Board and so on.

The board is thin in thickness and large in hardness, and the filling insulator is relatively thick, elastic and light in properties.

Specifically, when the heat-treated flame-retardant nonwoven fabric is passed through at least one forming roller maintained at a temperature of 80 to 150 ° C and subjected to a cooling treatment, the molten low melting point polyester fiber contained in the nonwoven fabric is solidified into a predetermined shape It is possible. The manufacturing method of passing the shaping roller in this way allows a mass production by a continuous process compared to a press method which requires a lot of equipment and manufacturing time in the past, and thus it is possible to reduce the cost.

In addition, the internal temperature of the actual tenter and the temperature of the thermoforming roller can be variously controlled depending on the kind of the low-melting-point polyester fiber and the moisture content of the nonwoven fabric.

Further, according to an embodiment of the present invention, a composite fiber board having a desired thickness and density can be finally manufactured by sequentially passing two or more forming rollers having various ratios of the thickness after the roller passing to the thickness after the roller passing. In addition, the shaping step can be constituted by further adding shaping rollers controlled by various pressing forces.

According to an embodiment of the present invention, the composite fiberboard of the filler type may be compressed to about 50% of the initial flame retardant nonwoven fabric thickness, Type composite fiberboard can be compressed to about 20% of the initial flame retardant nonwoven fabric thickness.

The above-described cover member can be formed on at least one surface of the thus obtained compression-molded plate. The cover member may be formed of an adhesive or may be disposed on the lower surface of the nonwoven fabric or may be disposed on the upper surface of the nonwoven fabric during the process of forming the nonwoven fabric, The cover member can be introduced to one side or both sides of the compression-molded plate by thermocompression or the like. In addition, the above-described cover member may be formed on at least one surface of the compression-molded plate by various methods applicable in the art.

According to another aspect of the present invention, there is provided a functional cellulosic composite material comprising: a fabric having a flame-retardant binder formed of cotton fibers adhered to a surface thereof; And a cover member formed on at least one surface of the fabric,

Wherein the content of the flame retardant binder is 50 to 130 parts by weight based on 100 parts by weight of the fabric, the flame retardant binder is 5 to 35 parts by weight of starch, 5 to 25 parts by weight of a phosphorus flame retardant, 1 to 10 parts by weight of a wetting agent, 10 to 10 parts by weight of a binder and 3 to 15 parts by weight of a binder, wherein the cover member is one or more kinds of laminated layers selected from the group consisting of a nonwoven fabric, a veneer, a polymer film, an aluminum sheet and a high strength fiber fabric.

The flame-retardant binder is the same as the above-mentioned contents, and a fabric composed of cotton fibers can be applied to various kinds of fiber aggregates such as woven fabric and knitted fabric using cotton fibers.

The fabric having the flame-retardant binder attached to its surface may be prepared by first preparing a fabric with cotton fibers and then treating the flame-retardant binder by a conventional method, or by pretreating cotton fibers with a flame-retardant binder, You can also prepare it as a fabric. In this case, the cotton material before the flame-retardant treatment with the flame-retardant binder is refined to remove oil and impurities from the surface.

The method of forming the cover member and the cover member on the cotton fiber fabric is also the same as described above.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

Example 1

The first flame retardant component was prepared by mixing the components of the first stage with the contents described in Example 1 of Table 1 below, and the second flame retardant component was prepared by mixing the components of the second stage, and then the components were mixed. Polyvinyl acetate 10 parts by weight of a polyolefin resin (trade name: Daeyoung Chemical Co., Ltd.) was added to prepare a flame retardant binder liquid.

100 parts by weight of kenaf fiber (cut to 5 to 20 cm, moisture content within 7%) was impregnated into 15 parts by weight of the prepared flame retardant binder solution and aged for 3 hours. Thereafter, it was dewatered using a dehydrator apparatus and dried at a temperature of 100 to 130 ° C to prepare flame-retarded kenaf fiber.

Further, a cotton fiber (cotton / water content of 5% or less) was provided with a flame-retarded cotton fiber in the same manner as the kenaf fiber.

Thereafter, 40 parts by weight of the flame-retarded kenaf fiber, 40 parts by weight of the flame-retarded cotton fiber, and 10 parts by weight of low melting point polyester fiber (15 denier / fiber length 40 mm, melting point 130 ° C, And a nonwoven fabric having a thickness of 2.3 Kg per square meter laminated with a carding machine was prepared.

A nonwoven fabric formed of polyester fibers was disposed on the lower and upper surfaces of the nonwoven fabric, and then the nonwoven fabric was adhered using two or more different chambers using low melting point polyester fibers.

Specifically, in the first chamber, the nonwoven fabric was dried at a temperature of 100 ° C., and the nonwoven fabric was heated in a stepwise manner. In the final chamber, the temperature was adjusted to 140 ° C. and the low melting point polyester fiber was melted through a tenter.

Thereafter, the result of the above step is formed by sequentially passing through the first shaping roller, the second shaping roller, and the third shaping roller to form a compression molded plate of a functional cellulose composite fiber nonwoven fabric having a thickness of 15 mm, A functional cellulose composite material having a cover member formed on both sides was manufactured.

Thereafter, a nonwoven fabric formed of polyester fiber as a cover member on both sides of the pressure-sensitive molded plate of the functional cellulose conjugated fiber nonwoven fabric is placed on top of and below the mixed flame retardant fiber in the process of manufacturing the composite template, To prepare a functionalized cellulose composite material.

Examples 2 to 4

Functionalized cellulose composite materials were prepared in the same manner as in Example 1, except that the flame-retardant binder liquids prepared in the contents of Examples 2 to 4 in Table 1 were used, respectively.

fair ingredient Example 1 Example 2 Example 3 Example 4 ball
tablet Stage 1 Corn starch 28 20 10 Potato starch 28 Phosphoric acid 20 20 15 8 water 10 10 25 30 Wetting agent 2 2 2 2 sub Total 60 60 60 60 Step 2 Polyborate 5 5 5 5 water 35 35 35 35 sub Total 40 40 40 40 Sum 100 100 100 100

Wetting agent: OT-75

(The unit is the weight part)

Character rating

In the tests of the functional cellulose composite materials prepared in Examples 1 to 4 by the cone calorie test (KS M ISO 5660-1), the results shown in the following Table 2 were obtained.

Further, the gas toxicity test of the functional cellulose composite material prepared in Examples 1 to 5 was carried out, and the results shown in Table 2 were obtained.

The gas toxicity test is a method of collecting the smoke from burning a specimen, injecting it into a certain space of a rat, and measuring the time when the rat survives. The semi-fire function must exceed 10 minutes.

Example 1 Example 2 Example 3 Example 4 Flame Retardant Performance Test (Cone Calorie Test / 5 minutes heating) Total calorific value 1.7 1.8 2.5 2.9 Perforation or crack visual evaluation No penetration or cracks No penetration or cracks No penetration or cracks No penetration or cracks Gas hazard test Average Behavior Time 13.5 13.3 13.5 13.7

Example 5

The first flame retardant component was prepared by mixing the components of Step 1 with the contents described in Example 5 of Table 3 below, and the second flame retardant component was prepared by mixing the components of Step 2, and then the components were mixed, and polyvinyl acetate 10 parts by weight of a polyolefin resin (trade name: Daeyoung Chemical Co., Ltd.) was added to prepare a flame retardant binder liquid.

fair ingredient Example 5 Example 6 Example 7 Example 8 ball
tablet Stage 1 Corn starch 28 20 10 Potato starch 28 Phosphoric acid 20 20 15 8 water 10 10 25 30 Wetting agent 2 2 2 2 sub Total 60 60 60 60 Step 2 Polyborate 5 5 5 5 water 35 35 35 35 sub Total 40 40 40 40 Sum 100 100 100 100

Wetting agent: OT-75

(The unit is the weight part)

Thereafter, 100 parts by weight of kenaf fiber (cut to 5 to 20 cm, moisture content within 7%) was impregnated into 15 parts by weight of the prepared flame retardant binder solution and aged for 3 hours. Thereafter, it was dewatered using a dehydrator apparatus and dried at a temperature of 100 to 130 ° C to prepare flame-retarded kenaf fiber.

In addition, kenaf fiber treated with a flame-retardant coconut fiber (cut to 5 to 20 cm, moisture content of 7%) was prepared in the same manner as that of the kenaf fiber.

In addition, cotton fiber (defatted cotton, recycled cotton / moisture within 5%) was prepared with kenaf fiber treated with flame retardant in the same manner as the kenaf fiber.

Thereafter, 40 parts by weight of the flame-retarded kenaf fiber, 10 parts by weight of the flame-retarded coconut fiber, 40 parts by weight of the flame-retarded cotton fiber and the low melting point polyester fiber (15 denier / fiber length 40 mm, Manufactured by Shin-Etsu Chemical Co., Ltd.) was prepared and laminated with a carding machine to prepare a nonwoven fabric of 2.3 Kg per square meter.

Then, two or more different chambers were used for drying and heating.

Specifically, in the first chamber, the nonwoven fabric was dried at a temperature of 100 ° C with a tenter, and the temperature was gradually increased In the last chamber, the temperature was adjusted to 140 ° C and the low melting point polyester fibers were melted through a tenter.

Thereafter, the resultant product was formed by sequentially passing through a first forming roller, a second forming roller, and a third forming roller to produce a functional cellulose composite material having a thickness of 15 mm.

Examples 7 to 8

Functionalized cellulose composite materials were prepared by the same method as in Example 5, except that the flame-retardant binder liquids prepared in the contents according to Examples 7 to 8 in Table 3 were used, respectively.

Character rating

In the tests of the functional cellulose composite materials prepared in Examples 5 to 8 by the cone calorie test (KS M ISO 5660-1), the results shown in Table 4 were obtained.

Further, the gas toxicity test of the functional cellulose composite materials prepared in Examples 5 to 8 was carried out, and the results shown in Table 4 were obtained.

The gas toxicity test is a method of collecting the smoke from burning a specimen, injecting it into a certain space of a rat, and measuring the time when the rat survives. The semi-fire function must exceed 10 minutes.

Example 5 Example 6 Example 7 Example 8 Flame Retardant Performance Test (Cone Calorie Test / 5 minutes heating) Total calorific value 1.6 1.7 2.3 2.7 Perforation or crack visual evaluation No penetration or cracks No penetration or cracks No penetration or cracks No penetration or cracks Gas hazard test Average Behavior Time 13.1 13.5 13.3 13.6

Claims (2)

A cover member formed of at least one layer selected from the group consisting of a nonwoven fabric, a veneer, a polymer film, an aluminum sheet and a high strength fiber fabric on at least one surface of the press-formed sheet, and,
30 to 50 parts by weight of the kenaf fiber having been subjected to the flame-retarding treatment of the functional cellulose conjugated fiber nonwoven fabric, 30 to 50 parts by weight of the flame-retarded cotton fiber, and 5 to 30 parts by weight of the low-
Wherein the flame-retarded kenaf fiber and the flame-retarded cotton fiber have a flame-retardant binder attached to each fiber surface,
The content of the flame-retardant binder is 20 to 40 parts by weight based on 100 parts by weight of the pressure-
Wherein the flame-retardant binder comprises 5 to 35 parts by weight of a starch, 5 to 25 parts by weight of a phosphorus-based flame retardant, 1 to 10 parts by weight of a wetting agent, 1 to 10 parts by weight of a polyborate, and 3 to 15 parts by weight of a binder,
Wherein the cover member is a laminate of one or more kinds selected from the group consisting of a nonwoven fabric, a veneer sheet, a polymer film, an aluminum sheet, and a high strength fiber fabric of glass fiber, carbon fiber, liquid crystalline polyester fiber, and aramid fiber, Material. A fabric formed of refined cotton fibers attached to a surface of a flame-retardant binder; And
And a cover member formed on at least one side of the fabric,
The content of the flame-retardant binder is 50 to 130 parts by weight based on 100 parts by weight of the fabric,
Wherein the flame-retardant binder comprises 5 to 35 parts by weight of a starch, 5 to 25 parts by weight of a phosphorus-based flame retardant, 1 to 10 parts by weight of a wetting agent, 1 to 10 parts by weight of a polyborate, and 3 to 15 parts by weight of a binder,
Wherein the cover member is a laminate of one or more kinds selected from the group consisting of a nonwoven fabric, a veneer sheet, a polymer film, an aluminum sheet, and a high strength fiber fabric of glass fiber, carbon fiber, liquid crystalline polyester fiber, and aramid fiber, Material.