KR100899613B1 - Fabric sheet using hemp fabric and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a fiber sheet in which hemp fibers and synthetic fibers are bonded, and a method of manufacturing the same.

The present invention implements a new type of fiber sheet combining a synthetic fiber having elasticity that is restored to its original shape after receiving a soft touch and compression, and a hemp fiber which is a natural fiber having functions such as insect repellent, antibacterial, water resistant, oil resistant, and UV protection. In this way, materials such as mattress reinforcements and cushioning materials with improved performance and functionality can be obtained, while low melting point fibers are used as synthetic fibers in combining hemp fibers and synthetic fibers. Provided are a fiber sheet using hemp fibers and a method of manufacturing the same.

Hemp fiber, synthetic fiber, low melting point fiber, fiber sheet, mattress reinforcement, cushion material

Description

Fabric sheet using hemp fibers and its manufacturing method {Fabric sheet using hemp fabric and method for manufacturing the same}

1 is a block diagram showing a process of manufacturing a fiber sheet comprising hemp fiber according to an embodiment of the present invention

Figure 2 is a schematic diagram showing a process for producing a fiber sheet including hemp fiber according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

10: hemp fiber layer 11: cisco-core fiber layer

12: composite fiber layer 13: web

14 Conveyor 15 Center Roller

16: large roller 17 small roller

18: reservoir tank 19: spike roller

20: needle 21: dryer

22: pressure roller 23: cooler

The present invention relates to a fibrous sheet combining hemp fibers and synthetic fibers and a method of manufacturing the same, and more particularly, to the peculiar properties (breathability, heat retention, antimicrobial activity, etc.) of natural hemp fibers, and synthetic fibers. The present invention relates to a fibrous sheet using hemp fiber and a method of manufacturing the same, combining the basic properties of the fiber (soft touch, elasticity, etc.) to further improve functionality.

Generally, fibers are natural fibers obtained from plants such as cotton, hemp, and ramie which are natural materials, and synthetic fibers such as polyester, nylon, acrylic, vinylon, polyurethane, and polypropylene which are chemically synthesized from low molecular weight compounds. Separated by.

Such natural fibers or synthetic fibers are not only widely used in the manufacture of garments, but also applied as a material for the manufacture of bags, shoes, wallpaper, bed mattresses, etc., or they are widely used in combination with rubber materials / silicone materials or tributaries or synthetic resin materials. Apply.

In addition, hemp fiber, which is a natural fiber, has a trend of increasing production recently as a material for living and industrial use.

This natural fiber, hemp fiber is 10 times longer than cotton and is known to have 20 times faster moisture absorption and discharge power, and has its own insect repellent and antibacterial properties, and is known to have excellent UV protection, water resistance and oil resistance. have.

The practical application of hemp fiber is antimicrobial, antitoxic, and insect repellent, which is used as a veterinary body of the body because it prevents the breeding of insects and close proximity of insects.

Covering fish when drying or using it as a tablecloth can also be seen as an example of application of insect repellent. The water resistance is strong, so it gets much tougher when wet with water, so it is also widely used as an anchor line in the coast. Even if you use it as a mop for a long time, unlike other fibers, it does not cut well.

In the recent trend of increasing interest in natural fibers, hemp fiber has been attracting attention as a material for summer due to its excellent hygroscopicity, dyeability, heat resistance, high thermal conductivity, fast absorption and drying, but has low elongation and low elastic recovery rate. Because of poor wrinkle recovery, the utilization rate is low for clothing materials.

On the other hand, polyester fibers, which are synthetic fibers, are excellently used for mattress reinforcement or cushioning because they are excellent in recovering their original shape after being subjected to soft touch and compression.

When mattress reinforcement or cushioning material is used in bed, etc., it is generally structured by arranging a plurality of cushion springs over the entire area and finishing the cloth with the outside so that it can be used permanently until mattress replacement.

This long-term use gradually absorbs moisture, which can lead to the growth and contamination of bacteria. Therefore, the mattress reinforcement or cushioning material also has an antibacterial function that actively suppresses the growth of bacteria and enhances breathability and deodorization. The demand for is gradually increasing.

Recently, some products that have given antibacterial function or breathability to the mattress cover have been proposed, but it cannot be seen as a fundamental solution.

Accordingly, the present invention has been made in view of the above, it is a synthetic fiber having elasticity to be restored to its original shape after receiving a soft touch and compression and natural fiber having a function such as insect repellent, antibacterial, water resistant, oil resistant, UV protection It is an object of the present invention to provide a fiber sheet using hemp fibers and a method of manufacturing the same, which can obtain a material such as a mattress reinforcement or a cushioning material having improved performance and functionality by implementing a new type of fiber sheet combining hemp fibers.

In addition, the present invention uses a low-melting point fibers as a synthetic fiber in combining hemp fibers and synthetic fibers, the fiber sheet using hemp fibers, which can obtain materials such as mattress reinforcement and cushioning material, which is environmentally friendly and highly recyclable There is another purpose in providing a method.

Fiber sheet using hemp fiber according to an embodiment of the present invention for achieving the above object is 10 to 60% by weight of hemp fiber, 15 to 50% by weight of Cisco-type polyethylene terephthalate fiber and mono-type polyethylene terephthalate fiber An upper layer containing 25 to 75 wt%; It is characterized by consisting of a lower layer containing 15 to 50% by weight of Cisco-type polyethylene terephthalate fiber, 20 to 75% by weight of mono-type polyethylene terephthalate fiber and 10 to 30% by weight of composite fiber.

In addition, the upper layer is 30 to 70% by weight, the lower layer is characterized in that it maintains the range of 70 to 30% by weight.

In addition, the cisco type polyethylene terephthalate fiber is characterized in that the fineness of 2 to 6 denier.

In addition, the monopolyethylene terephthalate fiber is characterized in that the fineness of 4 to 20 denier.

In addition, the composite fiber is characterized in that a permanent helical crimp is given by complex spinning two or more kinds of polymers.

In addition, the composite fiber is characterized in that the fineness of 4 to 12 denier.

On the other hand, the manufacturing method of the fiber sheet using hemp fiber according to an embodiment of the present invention for achieving the above object is to form a web by carding the hemp fiber layer, the Cisco-type fiber layer and the composite fiber layer, and the step Comprising the step of primary bonding the web formed in the needling process and the step of putting the first bonded web in the dryer in the dryer and secondarily firmly bonding through the adhesiveness of the Cisco-like fibers. It features.

The method may further include securing a constant thickness by passing the web through the pressure roller after the second coupling of the web.

In addition, after the secondary bonding of the web to pass through the pressure roller to equalize the thickness, it is characterized in that it further comprises the step of cooling the heat remaining in the web by introducing the web into the cooler.

In addition, the forming of the web may include pre-carding the cisco-like fiber layer and the composite fiber layer, dispersing hemp fibers thereon, stacking hemp fiber layers, and then forming a web. do.

In addition, the Cisco-type fibers used in the step of forming the web is characterized in that the sheath side is a composite fiber of the form of a low melting point fiber.

In addition, in the step of primary bonding the web, the needling conditions are 600 to 1,100 rpm for punching speed, 5 to 10 mm for hemp fiber layer, 0 to 10 mm for Cisco fibers and composite fiber layers for needle punching. Characterized in that.

In addition, the hot air drying conditions in the step of secondary bonding the web is characterized in that the temperature is maintained at 100 to 190 ℃, 2 to 10 m / min in the case of the feed rate.

Hereinafter, with reference to the accompanying drawings, a fiber sheet using hemp fibers and a method of manufacturing the same according to an embodiment of the present invention will be described in detail.

1 is a block diagram showing a process of manufacturing a fiber sheet comprising hemp fiber according to an embodiment of the present invention, Figure 2 is a process of manufacturing a fiber sheet including a hemp fiber according to an embodiment of the present invention Schematic diagram showing.

As shown in Figure 1 and Figure 2, in one embodiment of the fiber sheet manufacturing method using hemp fiber according to the present invention and hemp fiber which is a natural fiber having properties such as insect repellent, antibacterial, water, oil, UV protection The present invention provides a method for manufacturing a new fiber sheet incorporating a synthetic fiber having properties such as soft touch and elasticity that can be restored to its original state.

In particular, by using low melting fibers as well as needling in the bonding of hemp fibers and synthetic fibers, the bonding between the fibers is not only solid, but also environmentally friendly and recyclable.

The low-melting fibers used in this bonding is a sheath-core fiber, the center and the outer portion of the fiber is different, the components may be made in various combinations.

For example, as the form of the sheath + core, ciscore type fibers having a combination such as PP + nylon, PET + PP, PE + PP, PET + PET and the like can be used.

In one embodiment of the present invention by using the normal PET fibers on the core side, and low melting point PET fibers (melting point 110 ℃) on the sheath, it is possible to combine the fibers as heat without using a synthetic resin.

The composition of the fiber sheet provided by the present invention is as follows.

The fiber sheet is composed of 10 to 60% by weight of hemp fibers, 15 to 50% by weight of Cisco-type polyethylene terephthalate fibers, and 25 to 75% by weight of mono-type polyethylene terephthalate fibers. A layer comprising a portion and a lower layer containing 15 to 50% by weight of Cisco-type polyethylene terephthalate fibers, 20 to 75% by weight of mono-type polyethylene terephthalate fibers, and 10 to 30% by weight of composite fibers, and materials such as mattress reinforcements and cushioning materials. Consists of layers containing the functional part of.

In this case, in the case of the upper layer and the lower layer, the upper layer is 30 to 70% by weight based on the total weight, and the lower layer is preferably maintained in the range of 70 to 30% by weight, and more preferably, the upper layer is 40% and the lower layer is 60% by weight. It is good to keep it in%.

In addition, in the case of the Cisco-type polyethylene terephthalate fiber, a fineness of 2 to 6 denier is used, and in the case of the mono-type polyethylene terephthalate fiber, a fineness of 4 to 20 denier is used, and in the case of the composite fiber, the fineness is 4 It is preferable to use the thing of -12 denier.

In the present invention, the 'monotype' is used to mean a non-siscoarity type to a conventional fiber type as a concept corresponding to the 'cyscoa type'. In addition, 'composite fiber' is a conventional composite fiber manufactured by complex spinning of two kinds of polymers having different properties in acrylic, nylon, polypropylene, etc. through a spinning technique called 'conjugate spinning'. By providing the phosphorus spiral crimp, not only the elastic recovery rate and bulkiness are excellent in general characteristics, but also the touch is soft and excellent in thermal insulation, and thus it can be usefully used as a fiber sheet material for mattress reinforcement or cushioning material.

Looking at the process of manufacturing a fiber sheet that can be used as a material such as mattress reinforcement or cushioning material using hemp fibers, Cisco-like fibers, composite fibers having the above fiber composition.

A hemp fiber layer 10 comprising a functional part containing hemp fibers, a cisco-type fiber layer 11, such as a cisco-type polyethylene terephthalate fiber layer, regular regular fibers and composite fibers Carding the composite fiber layer 12 comprising a functional part as a rehabilitation and reinforcement or cushioning material to form a web, and optionally, if necessary, the web 13 is subjected to a needling process. Primary bonding.

Here, the carding process passes the bundle of fibers conveyed by the conveyor 14 through a central roller 15 and a plurality of large rollers 16 and a small roller 17 disposed around the central roller 15. As a process, the fiber bundles can be continuously combed by a certain amount by the rotation of the rollers and evenly formed into a web.

In particular, the present invention provides a process for effective webization of hemp fiber layers.

For example, carding the hemp fiber layer directly may result in uneven carding and faster cleaning cycles.

This is because the cisco-type fibers and hemp fibers are entangled with each other, and carding work is uneven. Even when only hemp fibers are carded, it is difficult to work with existing equipment only because the thickness is different from general polyester fibers.

Moreover, a lot of dust is generated during hemp fiber carding, causing a lot of pollution around.

If the fibers are entangled with each other, the cleaning cycle will be faster and work efficiency will be reduced.

Therefore, in the present invention, the hemp fibers can be effectively webized by separating the hemp fibers in a single process and dispersing them on the composite fiber layer and the Cisco-like fiber layer after carding.

To this end, the cisco-like fiber layer and the composite fiber layer are first carded, and then the hemp fiber layer is dispersed thereon just before forming the web.

That is, in the reservoir tank 18 filled with the hemp fiber layer, the hemp fibers having passed through the spike roller 19 are evenly distributed thereon.

At this time, the hemp fibers are evenly dispersed on the Cisco-like fiber layer and the composite fiber layer with the fiber length cut to a length of about 1-15mm.

Therefore, compared to the carding work of the three fiber layers directly, foreign matter mixing or cleaning cycle is improved, and dust generation at the work site is minimized, and thus, many advantages can be obtained for improving the working environment and improving the process.

After completing the steps for forming the web as above, the step of primary bonding between the fiber layer is performed.

Optionally, when the thickness of the product is thin and requires density, the thickness and density can be controlled by needling the fibers, and the needling at this time can maintain the primary bond between the fibers.

In the first bonding step of the web, the needling may apply a method in which each fiber layer is entangled and bonded to each other while moving the needle 20 in the vertical direction.

At this time, the needle punching speed is 600 to 1,100 rpm, the needle is 5 to 10 mm for the hemp fiber layer, 0 to 10 mm for the cisco-core fiber layer and the composite fiber layer when needled the surface and back surface of the web to form a bond force of the fiber It is preferable to perform the needling under the condition that it is kept at.

Here, if the immersion is out of the above range, the bonding between the upper layer and the lower layer is not intact, the peeling phenomenon occurs, or if excessive, it is difficult to control the thickness due to excessive binding between the fibers, it is not preferable because the upper and lower layers are mixed. Can not do it.

After completing the first bonding to the web, that is, the needling process as described above, the second bonding is performed between the fiber layers using fusion of low melting point fibers.

When the primary bonded web is secondary bonded, a conveyor conveying dryer 21 for maintaining the web at 100 to 190 ° C. in order to give a binding effect of low melting point fibers (for example, Cisco-type polyethylene terephthalate fibers). ) And blows the heated air while advancing at a feed rate of 2 to 10 m / min.

Therefore, the low melting point fiber of the sheath side is bonded by the hot air in the dryer at the intersections between the fibers using self-adhesiveness, so that the web can be more firmly bonded.

In this case, when the time passing through the dryer is too short or the temperature is less than 100 ° C., the low-melting fiber does not bond to the outside or reach the melting temperature before bonding using self-adhesiveness.

On the contrary, if the time passed through the dryer is too long or the temperature is 190 ° C. or more, the low melting point fibers are entangled with each other and the binding is excessively strengthened, thereby increasing the pressure loss and blocking the pores of the product to reduce the air permeability. Wrinkles or agglomeration may occur.

In the case of the above web secondary bonding step, the low melting point fiber is used instead of the synthetic resin to bond the fibers, and thus, the eco-friendly and highly recyclable properties of the web can be obtained.

When the secondary bonding step of the web as described above is completed, to control the thickness of the product by using the pressure roller 22 as an optional process to improve the quality of the product and even thickness.

The gauge of the pressure roller can be controlled up to 4 ~ 10mm and can be applied to the form consisting of four roller combinations up and down.

In this process, the roller itself is not heated, but after the drying process, the pressurizing process proceeds with the pressurizing roller, that is, the pressurizing roller process proceeds immediately before the heat received from the dryer cools down. Compression and calendering can be achieved before the end of the bond, thus achieving both an even surface and a constant control of the thickness of the product.

On the other hand, even if the thickness and the surface of the product, that is, the web by the pressure roller as described above, the heat remaining in the product may not remain completely cooled, but heat may still remain in the web.

Due to the remaining heat, the low melting point fiber is not completely finished by the heat, but leaves room for deformation.

In this state, when the product is cut, low melting point fibers may stick to the cutting blades and the blades need to be replaced frequently, and low melting point fibers may stick to the cutting parts, causing deformation of the appearance.

In view of this point, in the present invention, a cooling step for cooling the heat remaining in the product is performed after the roller pressing step using the pressure roller.

That is, by cooling the heat remaining in the product by passing the web after the web roller pressing step through the cooler 23, it is possible to prevent the appearance change of the product and to eliminate the phenomenon that the low melting point fibers stick to the blade. .

At this time, the cooler may be a well-known cool air system, and the cooling process is preferably performed at a temperature of about 10 to 30 ° C. for about 10 to 90 sec.

As described above, when the step of forming the web through the secondary bonding using the self-adhesiveness of the low melting point fiber (or pressing with a roller and cooling) is completed, It is possible to obtain a complementary fibrous sheet of synthetic fibers having good contact feeling and durability.

Here, the weight of the fiber sheet, that is, the weight of the product is preferably about 100 ~ 6,000g / ㎡, if the total weight is less than 100g / ㎡ the formation of the web is rough, the product evenly (the distribution degree of evenly distributed fibers In the case where)) is dropped and exceeds 6,000 g / m 2, it is preferable to maintain the above weight range because the web is too large or thickened so that heat is not properly received and bonding is not uniform.

The fiber sheet combining the natural fiber and the chemical fiber according to the embodiment of the present invention thus obtained may be appropriately applied to materials such as bed mattress reinforcement or cushioning material, mattress cover, pillow cover, mat or cushion that can be used indoors or outdoors. Can be.

As described above, the present invention combines the hemp fiber, which is a natural fiber, and the polyester fiber, which is a synthetic fiber, together with the elasticity and soft touch, which are advantages of the polyester fiber, as well as the antibacterial, warmth, breathability, moisture absorption, and divergence of the hemp fiber. By providing a new type of fiber sheet material with functionality such as sex, it can be usefully applied as a material such as mattress reinforcement or cushioning material. In the case of the fiber bonding method, it is combined with only needling and heat without the synthetic resin. As a result, it is not only eco-friendly but also easy to recycle.

Claims (14)

An upper layer containing 10 to 60% by weight of hemp fibers, 15 to 50% by weight of Cisco-type polyethylene terephthalate fibers and 25 to 75% by weight of mono-type polyethylene terephthalate fibers; A lower layer containing 15 to 50% by weight of Cisco-type polyethylene terephthalate fiber, 20 to 75% by weight of mono-type polyethylene terephthalate fiber, and 10 to 30% by weight of composite fiber; Fiber sheet using hemp fibers, characterized in that consisting of. The fiber sheet using hemp fibers according to claim 1, wherein the upper layer is 30 to 70% by weight, and the lower layer is maintained at 70 to 30% by weight. The fiber sheet using hemp fibers according to claim 1, wherein the cisco type polyethylene terephthalate fiber has a fineness of 2 to 6 deniers. The fiber sheet using hemp fibers according to claim 1, wherein the monopolyethylene terephthalate fiber has a fineness of 4 to 20 deniers. The fiber sheet using hemp fibers according to claim 1, wherein the composite fiber is spun with two or more kinds of polymers to give a permanent spiral crimp. The fiber sheet using hemp fibers according to claim 1 or 5, wherein the composite fiber has a fineness of 4 to 12 deniers. Carding the hemp fiber layer, the cisco-like fiber layer, and the composite fiber layer to form a web; Primary bonding the web formed in the step to a needling process; Putting the first bonded web in the dryer in the step to form a second bond firmly through the adhesiveness of the Cisco fibers; Method for producing a fiber sheet using hemp fibers, characterized in that it comprises a. The method of manufacturing a fiber sheet using hemp fibers according to claim 7, further comprising securing a constant thickness by passing the web through the pressure roller after the secondary bonding of the web. The method of claim 8, further comprising the step of passing through the pressure roller after the second bonding of the web to equalize the thickness and then injecting the web into the cooler to cool the remaining heat in the web fiber using hemp fiber Manufacturing method of the sheet. The method of claim 7, wherein the forming of the web comprises precarding the cisco-like fiber layer and the composite fiber layer, and then dispersing the hemp fibers to stack the hemp fiber layers to form a web. Method for producing a fiber sheet using hemp fibers, characterized in that. The method of manufacturing a fibrous sheet using hemp fibers according to claim 7 or 10, wherein the cisco-core fiber used in the forming of the web is a composite fiber having a sheath side of a low melting point fiber. The method of claim 7, wherein in the step of primary bonding the web, the needling conditions are 600 to 1,100 rpm for punching speed, 5 to 10 mm for hemp fiber layer, 0 to 10 mm for sciscoa fiber layer and composite fiber layer for needle punching. Method for producing a fiber sheet using hemp fibers, characterized in that to be maintained as. The method according to claim 7, wherein the hot air drying conditions in the step of secondary bonding the web is 100 to 190 ℃ for the temperature, 2 to 10 m / min for the feed rate of the fiber sheet using hemp fibers, characterized in that Manufacturing method. delete

Images