KR101754907B1 - Functional cellulose composite fiber panel and preparation method thereof - Google Patents

Abstract

A functional cellulosic composite fiber board comprising a compression-molded sheet of a functional cellulose-conjugated fiber non-woven fabric, wherein the functional cellulose conjugated fiber non-woven fabric comprises 30 to 50 parts by weight of a flame retarded kenaf fiber, 30 to 50 parts by weight of a flame- And 5 to 30 parts by weight of a melting point polyester fiber, wherein the flame-retarded kenaf fiber and the flame-retarded cotton fiber are attached to the surface of each fiber, wherein the flame-retardant binder is selected from the group consisting of starch, phosphorus- , A wetting agent, and a binder, and a method for producing the functional cellulose composite fiber board.

Description

TECHNICAL FIELD [0001] The present invention relates to a functional cellulose composite fiber panel,

More particularly, the present invention relates to a functional cellulose composite fiber board having excellent flame retardancy and antimicrobial properties, and reinforced strength and elasticity, and a method for producing the same.

Natural fibers are fibers obtained from natural organisms and minerals, and are classified into plant fibers, animal fibers, and mineral fibers depending on raw materials. 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- And a method for producing the functional cellulose composite fiber board.

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

A first embodiment is a functional cellulosic composite fiber board comprising a compression-molded plate of a non-woven fabric of a functional cellulosic composite fiber,

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.

The second embodiment, in the first embodiment,

Wherein the low melting point polyester fiber is a low melting point flame retardant polyester fiber.

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

Wherein the binder is at least one selected from the group consisting of an acrylate resin, a polyvinyl acetate resin, a urethane resin, a melamine resin, and an epoxy resin.

The fourth embodiment is, in any one of the first to third embodiments,

Wherein the functional cellulosic composite fiber nonwoven fabric further comprises 5 to 30 parts by weight of coconut fiber.

According to an aspect of the present invention, there is provided a method for producing a functional cellulose composite fiber board of the following embodiments.

In a fifth embodiment,

The kenaf fibers and the cotton fibers can be used individually or simultaneously

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;

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; And

And molding the heated flame-retardant nonwoven fabric.

The sixth embodiment is, in the fifth embodiment,

1 to 10 parts by weight of a first flame retardant composition comprising a flame retardant binder liquid and 5 to 35 parts by weight of a starch flame retardant, 5 to 25 parts by weight of a phosphorus flame retardant, 1 to 10 parts by weight of a wetting agent and 10 to 30 parts by weight of water, 30 to 40 parts by weight of a second flame retardant composition; And mixing the flame retardant solution with a binder to obtain a functional cellulose composite fiber board.

The seventh embodiment is, in the fifth or sixth embodiment,

Wherein the flame-retarded kenaf fiber comprises 1 to 20 parts by weight of a flame-retardant binder liquid based on 100 parts by weight of the kenaf fiber, and the flame-treated cotton fiber comprises 1 to 20 parts by weight of a flame- Which is a method for producing a functional cellulose composite fiber board.

The eighth embodiment is, in any of the fifth to seventh embodiments,

Wherein the step of preparing the flame-retardant nonwoven fabric further comprises 5 to 30 parts by weight of a flame-retarded coconut fiber.

The ninth embodiment is, in any of the fifth to eighth embodiments,

Further comprising the step of further flame-retarding the flame-retardant nonwoven fabric before heating the flame-retardant nonwoven fabric.

The tenth embodiment is, in any of the fifth to ninth embodiments,

Wherein the heating step raises the temperature stepwise from 100 占 폚 to 140 占 폚 to dry and melt the low melting point polyester fiber.

The eleventh embodiment is, in any of the fifth to tenth embodiments,

Wherein the molding step is a molding by a roller or a molding by a press.

The cellulose composite fiber board according to an embodiment of the present invention maximizes flame retardancy by using a flame-retardant binder containing both starch, phosphorus-based flame retardant and polybornate 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 fiber board in which the dimensional stability, which is a weak point of the conventional cellulose fiber sheet, is ensured, the volume reduction rate is reduced, and the strength and elasticity are reinforced.

As a result, in the present invention, the use of cellulose fibers in the field of industrial fibers can be enhanced through the production of a functional cellulose composite fiber board that maximizes flame retardancy, longevity and preservation while taking advantage of excellent environment friendliness, heat insulation, have.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention. And should not be construed as limiting.
1 is a flowchart illustrating a method of manufacturing a functional cellulose composite fiber board according to an embodiment of the present invention.
2 is a flowchart illustrating a method of fabricating a functionalized cellulose composite fiberboard according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 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 embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

A functional cellulose composite fiber board according to one aspect of the present invention is a functional cellulosic composite fiber board comprising a compression-molded plate of a non-woven fabric of a functional cellulosic composite fiber,

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

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 composite fiber board 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 fiber board, 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. The resultant functional cellulose composite fiber board 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 on the surface of the burning molecule by using a char to block the heat and to perform a flame retarding function to turn off the fire.

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 wetting agent serves to help water to be in good contact with the surface of powders such as starch, which is another component of the flame-retardant binder. The wetting agent may be a hydrophilic additive preferably containing two or more OH groups or COOH groups, Limiting examples 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.

According to another aspect of the present invention, there is provided a method of manufacturing a functional cellulose composite fiber board,

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; And

And molding the heated flame-retardant nonwoven fabric.

A method of manufacturing a functionalized cellulose composite fiber board according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

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.

Referring to FIG. 2, according to an embodiment of the present invention, the flame-retardant nonwoven fabric may be further 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 different ratios of the thickness before the roller passing through to the thickness after passing the roller. 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.

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 Step 1 with the contents described in Example 1 of Table 1 below, and the second flame retardant component was prepared by mixing the components of Step 2, followed by mixing them, and polyvinyl acetate 10 parts by weight of a polyol of 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.

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., 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 resultant product was formed by sequentially passing through a first forming roller, a second forming roller, and a third forming roller to prepare a functional cellulose composite fiber board having a thickness of 15 mm.

Examples 2 to 4

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

Wetting agent: OT-75

(The unit is the weight part)

Character rating

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

Further, the gas toxicity test of the functional fiber composite fiber sheets 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 polyol of Daeyoung Chemical Co., Ltd. was added to prepare a flame retardant binder liquid.

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 the first shaping roller, the second shaping roller, and the third shaping roller to prepare a functional cellulose composite fiber sheet having a thickness of 15 mm.

Examples 7 to 8

Functionalized cellulose composite fiber boards were prepared in the same manner as in Example 5, except that the flame retardant binder liquids prepared in the contents of Examples 7 to 8 in Table 3 were used, respectively.

Character rating

In the tests of the functional cellulose composite fiber boards 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 fiber sheets 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 (11)

A functional cellulosic composite fiber board comprising a press-formed sheet of a non-woven fabric of a functional cellulosic composite fiber,
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 method according to claim 1,
Wherein the low melting point polyester fiber is a low melting point flame retardant polyester fiber. The method according to claim 1,
Wherein the binder is at least one selected from the group consisting of an acrylate resin, a polyvinyl acetate resin, a urethane resin, a melamine resin, and an epoxy resin. The method according to claim 1,
Wherein the functional cellulosic composite fiber nonwoven fabric further comprises 5 to 30 parts by weight of coconut fiber. The kenaf fibers and the cotton fibers can be used individually or simultaneously
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;
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; And
And molding the heated flame-retardant nonwoven fabric. 6. The method of claim 5,
1 to 10 parts by weight of a first flame retardant composition comprising a flame retardant binder liquid and 5 to 35 parts by weight of a starch flame retardant, 5 to 25 parts by weight of a phosphorus flame retardant, 1 to 10 parts by weight of a wetting agent and 10 to 30 parts by weight of water, 30 to 40 parts by weight of a second flame retardant composition; And mixing the flame retardant solution with a binder to prepare a functional cellulose composite fiber board. 6. The method of claim 5,
Wherein the flame-retarded kenaf fiber comprises 1 to 20 parts by weight of a flame-retardant binder liquid based on 100 parts by weight of the kenaf fiber, and the flame-treated cotton fiber comprises 1 to 20 parts by weight of a flame- Wherein said functional cellulose-based fibrous sheet has a thickness of 10 to 20 mm. 6. The method of claim 5,
Wherein the step of preparing the flame-retardant nonwoven fabric further comprises 5 to 30 parts by weight of a flame-retarded coconut fiber. 6. The method of claim 5,
Further comprising the step of further flame-retarding the flame-retardant nonwoven fabric before heating the flame-retardant nonwoven fabric. 6. The method of claim 5,
Wherein the heating step raises the temperature stepwise from 100 占 폚 to 140 占 폚 so that the drying and melting of the low melting point polyester fiber are carried out. 6. The method of claim 5,
Wherein the step of molding is a molding by a roller or a molding by a press.

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