KR101558048B1 - paper having gas adsorptivity and manufacturing method thereof - Google Patents

Abstract

More particularly, the present invention relates to a wrapping paper having excellent gas adsorptivity and a method of manufacturing the wrapping paper. More particularly, the present invention relates to a wrapping paper having excellent gas absorption ability by adsorbing harmful gas such as ethylene, ammonia and / And a method for manufacturing the same.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a paper having excellent gas adsorptivity,

More particularly, the present invention relates to a wrapping paper having excellent gas adsorptivity and a method of manufacturing the wrapping paper. More particularly, the present invention relates to a wrapping paper having excellent gas absorption ability by adsorbing harmful gas such as ethylene, ammonia and / And a method for manufacturing the same.

Recently, consumers' interest in food environment has raised interest in safety and rationality of packaging for storage and distribution in the purchase of food or agricultural products. Therefore, the related packaging technology and packaging material have been developed and grown.

One of the conventional techniques is to adsorb and remove ethylene gas and carbon dioxide gas generated by the respiratory action of fruit and vegetables during long-term storage and transportation of fruit and vegetables, to prevent decay by microorganisms or to deodorize by removing adsorption of ammonia, The present invention has the effect of extending the circulation and storage period and allowing only the fragrance that increases the purchase value of the fruit and vegetable product to be remained, thereby stimulating the purchasing desire of the consumer and improving the merchantability. However, the polymer foam resin used as the raw material has no biodegradability and can cause environmental problems when used after disposal.

On the other hand, agricultural products such as fresh food, hors d'oeuvres and flowers are mainly packaged in cardboard boxes. The corrugated cardboard box protects the appearance of the product, but since it does not have the ability to maintain the freshness in the long-term distribution process, the freshness of fruits and vegetables such as fruit and vegetables becomes low and the circulation period becomes short. Most fruit and vegetables are matured over time. Ethanol gas, which is the aging hormone of the plant, is generated, accelerating ripening and causing rancidity.

In such a case, it is practically impossible to reduce the temperature inside the corrugated cardboard box or to shut off oxygen in order to reduce the amount of generated ethylene gas. Therefore, although it is an effective method to remove the generated ethylene gas, the conventional paper packaging material has a problem that the ethylene gas generated from the fresh product in the package can not be effectively adsorbed.

In addition, even in the case of a precision machine such as a watch or a camera, damage to the product may be caused by a very small amount of carbonic acid generated from the inside of the packaging box or harmful gas such as ammonia. Accordingly, it is necessary to develop a wrapping paper capable of protecting a precision machine from the outside while adsorbing harmful gas to the precision machine.

On the other hand, as the use of recycled fibers increases in the production of paper, the physical properties of the paper are rapidly deteriorated, so that thick paper is used to maintain a certain level of physical properties. As the weight of the wrapping paper becomes heavy, the cost of logistics has increased. Therefore, there is a desperate need for lightweight, strong and environmentally friendly functional paper wrapping paper.

 Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to solve the problem that the freshness is rapidly deteriorated by the ethylene gas generated in the cell respiration process of the fresh food, It is an object of the present invention to provide a wrapping paper excellent in gas adsorptivity capable of adsorbing and removing organoleptic substances such as amines, ammonia, acetic acid and the like. Another object of the present invention is to provide a wrapping paper which can extend the circulation and storage period of a fresh product and improve the purchase value by using a wrapping paper having excellent gas adsorptivity.

The present invention relates to a porous carrier; And a biodegradable polymer; and a paper-forming component.

According to a preferred embodiment of the present invention, the biodegradable polymer comprises (PE), polystyrene (PS), polylactic acid (PLA), polybutylene succinate (PBS), polyhydroxybutyrate (PHB), polyhydroxyalkano consisting of benzoate (PHA) and polyvinyl chloride (PVC) may include one or more of the group.

According to another preferred embodiment of the present invention, the gas-absorbing fibers may be contained in an amount of 10 to 100 parts by weight per 100 parts by weight of the biodegradable polymer.

According to another preferred embodiment of the present invention, the porous carrier may include at least one member selected from the group consisting of bermucurite, zeolite, germanium and bentonite.

According to another preferred embodiment of the present invention, the average pore size of the porous support may be 0.1 to 1.0 nm, and the BET specific surface area of the porous support may be 300 to 700 m 2 / g.

According to another preferred embodiment of the present invention, the porous carrier may have an average diameter of 10 to 75 mu m.

According to another preferred embodiment of the present invention, the gas-absorbent fibers may have an average fiber length (average fiber length) of 5.0 to 25 mm and a fineness of 5 to 100 denier.

According to another preferred embodiment of the present invention, the paper-forming component may comprise pulp.

According to another preferred embodiment of the present invention, 1 to 50% by weight of the gasketable fiber may be contained in the entire packaging composition.

Further, the present invention provides a wrapping paper excellent in gas adsorptivity with a tensile strength of 29 to 37 kN / m and a basis weight of 80 to 300 g / m 2.

According to a preferred embodiment of the present invention, the wrapper having excellent gas adsorptivity may include a wrapper composition having excellent gas adsorbability as described above.

According to another preferred embodiment of the present invention, the wrapper having excellent gas adsorptivity may have an average thickness of 0.1 to 0.5 mm.

Hereinafter, terms of the present invention will be described.

The "porous carrier" of the present invention is a carrier containing a plurality of pores and is a material having a function of adsorbing harmful gases such as ethylene gas, carbon dioxide gas, ammonia gas, and amine gas into the plurality of pores. In addition, the porous carrier has an effect of effectively adsorbing noxious gas by increasing the BET specific surface area.

The present invention provides a wrapping paper excellent in gas adsorptivity capable of adsorbing and removing an organism inducing substance such as ethylene gas, amine, ammonia, acetic acid, etc., and thus the freshness is rapidly deteriorated by ethylene gas generated in the cell respiration process of fresh food The problem is solved to provide wrapping paper which is very suitable as a packaging material for fresh foods and / or precision household appliances.

In addition, the present invention can provide a paper wrapping paper which has high utilization efficiency and excellent gas adsorptivity as a wrapping paper by improving the tensile strength of paper as well as gas adsorption.

Further, the present invention solves the problem that the product may be damaged by a very small amount of harmful gas such as carbonic acid or ammonia generated from the inside of the packaging box, and is very suitable for the packaging of precision machines such as watches and cameras This excellent wrapping paper can be provided.

In addition, the use of a biodegradable material has the effect of providing a wrapping paper that is light and strong, and is environmentally friendly and excellent in gas adsorptivity.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a photograph of the surface of a gas-absorbing fiber prepared in one embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

As described above, in the circulation and sale of fresh foods, it is possible to solve the problem that the freshness is rapidly deteriorated by the ethylene gas and the organic inducing substances such as amine, ammonia, acetic acid, . In addition, it is necessary to develop a wrapping paper that has the effect of effectively protecting harmful gas, which may cause damage to the precision machine even with a very small amount, and that has an effect of protecting the product by using a wrapping paper.

Accordingly, the present invention provides a porous carrier; And a biodegradable polymer, and a paper-forming component. The present invention has been made to solve the above-mentioned problems by providing a packaging composition excellent in gas adsorptivity. Accordingly, it is possible to provide a wrapping paper which is very suitable as a packaging material for fresh food and / or precision household appliance by solving the problem that the freshness is rapidly deteriorated by the ethylene gas generated in the cell respiration process of the fresh food, It is possible to provide a wrapping paper excellent in gas adsorptivity with a wrapping paper of a precision machine such as a watch or a camera, by solving the problem that the product may be damaged by a very small amount of harmful gas such as carbonic acid or ammonia. Further, since the wrapping paper has a tensile strength that is higher than that of the conventional wrapping paper, it is possible to provide a wrapping paper having a more excellent gas-absorbing ability.

The present invention relates to a porous carrier; And a biodegradable polymer; and a paper-forming component.

The biodegradable polymer is not particularly limited as long as it is a biodegradable polymer commonly used in fiber production. Preferably, the biodegradable polymer is selected from the group consisting of polypropylene (PP), polyester (PET), polyethylene (PE), polystyrene (PS), polylactic acid ), Polybutylene succinate (PBS), polyhydroxybutyrate (PHB), polyhydroxyalkanoate (PHA), and polyvinyl chloride (PVC) May comprise polylactic acid (PLA) or polybutylene succinate (PBS).

In addition, the porous carrier may increase the BET specific surface area to adsorb the gas, and may be used alone or in combination of several components depending on the kind of gas to be adsorbed. Further, the porous carrier is not particularly limited as long as it exhibits a gas adsorption effect including a plurality of pores, but may preferably include at least one member selected from the group consisting of bermucurite, zeolite, germanium and bentonite.

In addition, the porous carrier is not particularly limited as long as it has pores of a size that can be usually sold and / or synthesized, but preferably has an average pore size of 0.2 to 1.0 nm.

If a porous carrier having an average pore size of less than 0.2 nm is used, the ability to adsorb noxious gas may be deteriorated. If the porous carrier having an average pore size exceeding 1.0 nm is used, And the manufacturing cost of the packaging paper composition may increase.

The BET specific surface area of the porous carrier is not particularly limited as long as it is capable of adsorbing harmful gases as usual, but it may preferably have a BET specific surface area of 300 to 700 m 2 / g.

If a porous carrier having a BET specific surface area of less than 300 m < 2 > / g is used, the adsorbability of the packaging composition may be lowered. If a porous carrier having a BET specific surface area of more than 700 m & The manufacturing cost of the packaging paper composition may increase.

Further, the porous carrier is not particularly limited as long as it can be usually sold and / or synthesized, but preferably has an average diameter of 10 to 75 탆.

If a porous carrier having an average diameter of less than 10 탆 is used, the manufacturing cost of the porous carrier may increase, which may increase the unit cost of the product. If a porous carrier having an average diameter exceeding 75 탆 is used , It may be difficult to inject and foam the prepared packaging paper composition.

In addition, the content of the gas-adsorbable fiber is not particularly limited as far as it includes the porous carrier and the biodegradable polymer of the present invention, but preferably 10 to 100 parts by weight of the porous carrier may be included in 100 parts by weight of the biodegradable polymer .

If the gas-absorbing fiber contains less than 10 parts by weight of the porous carrier relative to 100 parts by weight of the biodegradable polymer, the adsorbing ability of the gas-absorbing fiber may be deteriorated, and the porous carrier may contain more than 100 parts by weight , The bonding force between the gas-adsorbing fibers is lowered, which may result in a problem of not being able to function as paper.

In addition, the gas-absorbent fiber is not particularly limited as long as it is a fiber length (fiber length) usually manufactured and / or sold through extrusion, but the average fiber length may preferably be 5.0 to 25 mm.

If a packaging paper composition comprising gas-adsorbing fibers having an average fiber length of less than 5.0 mm is produced, it may be difficult to produce a wrapping paper having an improved tensile strength and gas adsorption effect, and if the average fiber length exceeds 25 mm The gas-adsorbing fibers are not uniformly dispersed, so that it is difficult to produce the paper-making composition by paper.

The gas-adsorptive fiber is not particularly limited as far as its fineness (average diameter) is generally manufactured and / or sold through extrusion, but preferably it provides a gas-absorbent fiber having a fineness of 5 to 100 denier.

If the fineness of the gas-adsorptive fiber is less than 5 denier, the cost of fabricating the fiber may increase and the mass production of the fiber may become difficult. If the fineness of the gas-adsorptive fiber exceeds 100 denier, (stiffness) is so high that it causes not only a serious problem to the paper machine in the production of the paper but also a problem that the paper manufacture itself is difficult.

Further, the paper-formable component is not particularly limited as long as it is a material commonly used in paper manufacture, but may preferably include wood pulp.

The wood pulp means that the fibers constituting the plant are extracted and collected. The material is not particularly limited as long as it is a raw material commonly used in paper production. For example, softwood pulp (NP) and / or hardwood pulp (LP) can be used.

In addition, the content of the wrapping paper composition is not particularly limited as far as it contains gas-adsorbing fibers and paper-forming components, but it may preferably comprise 1 to 50% by weight of gas-absorbing fibers in the entire packaging composition.

If less than 1% by weight of the gas-adsorbing fiber is contained, the amount of the porous carrier present in the fiber is too small, and the adsorbing ability of the produced wrapping paper may deteriorate. If the amount of the gas- When the gas-adsorbable fiber is included, the produced packaging paper has excellent adsorbability, but too much gas-absorbing fiber, which is a hydrophobic fiber, may cause a problem that the paper binding force is lowered.

In addition, the wrapper composition may further include additives that may be included in the wrapping paper manufacturing process. For example, it may further include a sealable resin, a molded surface improver, a lubricant, and the like.

The sealable resin is a material to be blended to improve the bonding property of the inorganic particles such as the porous carrier to the biodegradable polymer and to facilitate the thermal fusion of the composition, and may preferably include a polyolefin wax .

The polyolefin wax includes a polyolefin homopolymer wax and a polyolefin copolymer wax, and among them, polyethylene wax, polypropylene wax or a mixture thereof is particularly preferable.

The molding surface improving agent may be calcium carbonate, talc or a mixture thereof.

Further, the lubricant may be selected from the group consisting of calcium stearate, zinc stearate, glycerin stearate, butyl stearate, calcium behenate, zinc behenate, glycerin behenate, butyl behenate, solid paraffin, liquid paraffin, beeswax, At least one selected from the group consisting of waxy wax and candelilla wax can be used. Among the above lubricants, behenic acid series having 22 carbon atoms is excellent in lubrication effect but has a disadvantage of high material cost, so it is economically advantageous to use stearic acid series having 18 carbon atoms. In addition, the fatty acid-based lubricant has an advantage of showing affinity to inorganic particles, and has an advantage that the surface is modified by coating an inorganic material having hydrophilic surface. Lubricants are additives that are used literally to lessen and smooth the friction between the raw materials. Although not all of the friction is bad, heat caused by friction during raw material mixing, melting, and processing can cause the raw material to decompose more than necessary, carbonize the organic additives such as starch in the raw material, and press the surface of a metal processing machine such as Twin Extruder And may be added in order to solve the occurrence of defects.

The present invention also provides a wrapping paper excellent in gas adsorptivity with a tensile strength of 29 to 37 kN / m and a basis weight of 80 to 300 g / m 2.

Further, the wrapping paper having excellent gas adsorptivity can provide a wrapping paper having a tensile strength and an adsorbing ability that is higher than that of a conventional wrapping paper, including a wrapping paper composition having excellent gas adsorbing ability as described above.

A typical conventional wrapping paper had a tensile strength of 20 to 24 kN / m. Specifically, as in Comparative Example 1, the conventional wrapping paper showed a tensile strength of 23.69 kN / m. On the contrary, the wrapping paper of the present invention has a tensile strength of 29.03 to 37.22 kN / m, indicating that it has an improved tensile strength than conventional wrapping paper.

In addition, the basis weight of conventional wrapping paper was about 200 g / m 2. The wrapping paper excellent in gas adsorptivity of the present invention has a basis weight of 80 to 300 g / m 2, including gas-absorbing fibers, and can be freely adjusted to produce a wrapping paper.

In addition, the amount of ethylene adsorbed on the wrapping paper prepared by the conventional method is 20 to 80 쨉 l / kg, which is not effective in adsorbing noxious gas, which is problematic in that it is used as a wrapping paper for fresh products and / or precision household appliances. Specifically, as in Comparative Example 1, the conventional wrapping paper showed an ethylene adsorption amount of 47 μl / kg. On the contrary, the wrappers of the present invention exhibited an adsorption amount of ethylene of 121 to 437 μl / kg, and thus it was confirmed that they are very suitable as packaging products for fresh products and / or precision household appliances.

The thickness of the gas-absorbing paper is not particularly limited as long as it is produced by a conventional papermaking method, but it may preferably be an average thickness of 80 to 300 mm.

In addition, the present invention relates to a method for producing a fiber composition by mixing a porous carrier and a biodegradable polymer; A second step of molding the fiber composition to produce a gas-absorbing fiber; 3) mixing the gas-adsorbable fiber and the paper-forming component to prepare a mixture; And pouring the mixture to produce a gas-absorbing paper; The present invention also provides a method for producing a wrapping paper excellent in gas adsorptivity.

First, the porous carrier and the biodegradable polymer are mixed in a first step to prepare a fiber composition.

The porous carrier increases the BET specific surface area and adsorbs the gas. Depending on the type of gas to be adsorbed, the porous carrier may be used alone or in combination of several components. Further, the porous carrier is not particularly limited as long as it exhibits a gas adsorption effect including a plurality of pores, but may preferably include at least one member selected from the group consisting of bermucurite, zeolite, germanium and bentonite.

In addition, the porous carrier is not particularly limited as long as it has pores of a size that can be usually sold and / or synthesized, but preferably has an average pore size of 0.2 to 1.0 nm.

If a porous carrier having an average pore size of less than 0.2 nm is used, the ability to adsorb noxious gas may be deteriorated. If the porous carrier having an average pore size exceeding 1.0 nm is used, And the manufacturing cost of the packaging paper composition may increase.

The BET specific surface area of the porous carrier is not particularly limited as long as it is capable of adsorbing harmful gases as usual, but it may preferably have a BET specific surface area of 300 to 700 m 2 / g.

If a porous carrier having a BET specific surface area of less than 300 m < 2 > / g is used, the adsorbability of the packaging composition may be lowered. If a porous carrier having a BET specific surface area of more than 700 m & The manufacturing cost of the packaging paper composition may increase.

Further, the porous carrier is not particularly limited as long as it can be usually sold and / or synthesized, but preferably has an average diameter of 10 to 75 탆.

If a porous carrier having an average diameter of less than 10 탆 is used, the manufacturing cost of the porous carrier may increase, which may increase the unit cost of the product. If a porous carrier having an average diameter exceeding 75 탆 is used , It may be difficult to inject and foam the prepared packaging paper composition.

In addition, the content of the fiber composition is not particularly limited as long as it contains the porous carrier and the biodegradable polymer of the present invention, but preferably 10 to 100 parts by weight of the porous carrier may be contained in 100 parts by weight of the biodegradable polymer.

If the gas-absorbing fiber contains less than 10 parts by weight of the porous carrier relative to 100 parts by weight of the biodegradable polymer, the adsorbing ability of the gas-absorbing fiber may be deteriorated, and the porous carrier may contain more than 100 parts by weight , The bonding force between the gas-adsorbing fibers is lowered, which may result in a problem of not being able to function as paper.

Next, in step 2, the fiber composition is molded to produce a gas-absorbing fiber.

The above-mentioned molding usually produces gas-adsorbable fibers by extruding a fiber composition in a method of producing fibers, and is not particularly limited as long as it is a method of producing fibers, but preferably a method of extruding at high temperature and / A method of injection at a high temperature can be used.

The high temperature is not particularly limited as long as the temperature is higher than the melting point of the biodegradable polymer contained in the fiber composition.

The extrusion is not particularly limited as long as it is a fiber extrusion production method. For example, it can be extruded at a pressure of 1.0 to 2.5 bar using an extruder.

Further, the injection is not particularly limited as far as it is a fiber injection production method.

The fineness of the gas-adsorbable fiber is not particularly limited as far as it is produced by molding with the ordinary fiber production method using the fiber composition, but preferably the fineness is 5 to 100 denier and the average fiber length is 5.0 To 25 mm.

If the fineness of the gas-adsorptive fiber is less than 5 denier, the cost of fabricating the fiber may increase and the mass production of the fiber may become difficult. If the fineness of the gas-adsorptive fiber exceeds 100 denier, (stiffness) is so high that it causes not only a serious problem to the paper machine in the production of the paper but also a problem that the paper manufacture itself is difficult.

In addition, if gas-absorbing paper containing gas-adsorbing fibers having an average fiber length of less than 5.0 mm is produced, it may be difficult to produce a gas-absorbing paper having an improved tensile strength and gas adsorption effect, When producing gas-adsorbing paper containing gas-adsorbing fibers having a length exceeding 25 mm, the gas-sorbing fibers may not be uniformly dispersed, which may result in difficulty in manufacturing into paper.

As described above, when the gas-absorbent fiber is formed by molding the fiber composition, the average length of the prepared fibers exceeds 25 mm, which may cause a problem that the gas-absorbent fibers are not uniformly dispersed.

Accordingly, in a preferred embodiment of the present invention, step 2-1, which is the molding step, is performed by extruding the fiber composition at a pressure of 150-230 ° C and 1.0-2.5 bar to produce a fiber; And cutting the fiber into 5.0 to 25 mm to produce a gas-adsorbable fiber. The gas-absorbing fiber of the present invention can be obtained by controlling the average length of the gas-absorbing fiber.

In step 2-1, the fiber composition is extruded at a pressure of 150-230 ° C and 1.0-2.5 bar to produce a fiber.

If the fiber composition is extruded at a temperature of higher than 230 ° C, it may be difficult to melt the biodegradable polymer at a temperature higher than the melting point of the biodegradable polymer There may be a problem that deformation due to temperature occurs.

In addition, extruding the fiber composition below 1.0 bar of pressure can cause difficulties in extruding the fiber composition, and if the fiber composition is extruded at a pressure exceeding 2.5 bar, There is a possibility that a foamed fiber which is not extruded is likely to be produced.

Next, in step 2-2, the fibers are cut to 5.0 to 25 mm to produce gas-adsorbable fibers.

The cutting is not particularly limited as long as it is a method of cutting fibers produced by extrusion. For example, the extruded fibers can be cut to a certain size by a method similar to that for making polymer pellets.

Next, in step 3, the gas-adsorbable fiber and the paper-forming component are mixed to prepare a mixture.

The content of the mixture is not particularly limited as far as it includes gas-adsorbable fibers and paper-forming components, but it may preferably contain 1 to 50% by weight of gas-adsorbing fibers.

If less than 1% by weight of the gas-adsorbing fiber is contained, the amount of the porous carrier present in the fiber is too small, and the adsorbing ability of the produced wrapping paper may deteriorate. If the amount of the gas- When the gas-adsorbable fiber is included, the produced packaging paper has excellent adsorbability, but too much gas-absorbing fiber, which is a hydrophobic fiber, may cause a problem that the paper binding force is lowered.

Further, the paper-formable component is not particularly limited as long as it is a material commonly used in paper manufacture, but may preferably include wood pulp.

The wood pulp means that the fibers constituting the plant are extracted and collected. The material is not particularly limited as long as it is a raw material commonly used in paper production. For example, softwood pulp (NP) and / or hardwood pulp (LP) can be used.

Next, in step 4, the mixture is papermaking to produce a gas-adsorbing paper.

The grass is not particularly limited as long as it is a method usually performed in paper production. For example, paper can be prepared by applying the mixture on a wire netting, followed by pressing and drying.

Meanwhile, in a preferred embodiment of the present invention, the grass of step 4 is prepared by injecting the mixture into a head box and then paper-making to produce paper stock; And (4-2) pressurizing the paper web in a drying roll; . ≪ / RTI >

First, in step 4-1, the mixture is poured into a head box and papered to produce paper.

The head box is a device for rectifying the paper material from the screen of the paper machine during the papermaking process and distributing the paper material in a well-dispersed manner at a required thickness and speed, and is not particularly limited as long as it is usually used for the papermaking process.

The required thickness is not particularly limited as long as it is the thickness of a paper to be produced, but it may preferably be 80 to 300 mm.

Next, in step 4-2, the paper is thermo-pressed on a drying roll to produce a wrapping paper excellent in gas adsorptivity.

The thermal pressure is not particularly limited as long as it is usually carried out in a paper machine, but it is preferably carried out at a temperature of 150 to 230 ° C and a pressure of 1.0 to 2.5.

The thickness of the wrapping paper having excellent gas adsorptivity is not particularly limited as long as it can be produced by a papermaking process, but it may preferably be 0.1 to 0.5 mm.

In the case where a porous carrier is simply applied to a polymeric resin and / or a pressure-sensitive adhesive and the polymeric resin, the pressure-sensitive adhesive and the porous carrier are mixed at the time of initial manufacture, and the polymeric resin and / or the pressure- A large part of the adsorption capacity of the porous carrier disappeared by blocking the pores of the porous carrier. Therefore, compared with the case where the wrapping paper manufactured through this method can not adsorb noxious gas, the method of manufacturing the wrapping paper excellent in gas adsorptivity of the present invention as described above can be carried out by extrusion molding the fiber composition containing the porous carrier, As can be seen, the carrier is distributed on the surface of the fibers to prevent the pores of the carrier from clogging, and it is possible to produce a wrapping paper having an excellent ability to adsorb noxious gas and excellent gas adsorptivity.

The tensile strength of conventional conventional wrapping paper was 20 to 24 kN / m. Specifically, as in Comparative Example 1, the conventional wrapping paper showed a tensile strength of 23.69 kN / m. On the contrary, the wrapping paper of the present invention has a tensile strength of 29.03 to 37.22 kN / m, indicating that it has an improved tensile strength than conventional wrapping paper.

Hereinafter, the structure and effect of the present invention will be described in more detail with reference to examples and comparative examples. However, this embodiment is only an example for explaining the present invention in more detail, and the scope of the present invention is not limited to these embodiments.

[ Example ]

Example  One.

Zeolite (product name: zeolite 325, manufactured by Youngnam Chemical Co., Ltd.) was pulverized and dried to prepare a porous carrier having an average diameter of 43 탆. Then, 1 g of the porous carrier was added to 9 g of polylactic acid (PLA, product of NatureWorks, product name: PLA 2002D) to prepare a gas-absorbable fiber composition.

Then, the gas-adsorbable fiber composition was extruded at 140 캜 using an extruder to produce a gas-absorbing fiber having an average diameter of 50 탆.

Then, the gas-absorbing fiber was cut into a length of 10 mm using a cutter. 1 g of the cut gas-absorbent fiber was mixed with 99 g of wood pulp (manufactured by NBNP), 1 g of rosin sizing agent (manufactured by ASHLAND) was added and mixed to prepare a mixture.

The mixture was then poured into a headbox of a weeping paddle (product name: DM-830, product of Daiko Techno Co., Ltd.), paper milled to produce paper, and then pressurized at 120 ° C and 1.5 pressure on a dry roll to obtain a basis weight of 300 g / M < 2 >

Example  2.

Except that 10 g of the porous carrier having an average diameter of 28 탆 and a polylactic acid having an average diameter of 28 탆 produced by using 500 meshes were mixed and 20 g of the gas-absorbing fiber cut thereinto was mixed with 80 g of wood pulp. A wrapping paper excellent in gas adsorptivity was produced in the same manner.

Example  3.

A wrapper excellent in gas adsorptivity was produced in the same manner as in Example 2, except that germanium was used instead of zeolite.

Example  4.

12.5 g of a porous carrier having an average diameter of 13 μm prepared using a 1,000-mesh mesh, 12.5 g of germanium having an average diameter of 13 μm prepared using 1,000 meshes, and 25 g of polybutylene succinate (PBS) A wrapping paper excellent in gas adsorptivity was prepared in the same manner as in Example 1, except that a composition for preparing a gas-absorbable fiber was used and 50 g of the gas-absorbable fiber cut thereinto was mixed with 50 g of wood pulp.

Example  5.

A wrapping paper excellent in gas adsorptivity was prepared in the same manner as in Example 2, except that the gas-adsorbing fiber having a length of 30 mm was used.

Comparative Example  One.

A paper was prepared in the same manner as in Example 1 except that only wood pulp was used without adding the gas-adsorbing fiber.

Comparative Example  2.

A paper was prepared in the same manner as in Example 1, except that the biodegradable polymer and the porous carrier were mixed with wood pulp, which is a paper-forming component.

Experimental Example  1. Hazardous gas Adsorption capacity  Experiment

The gas adsorption characteristics of the papers produced in Examples 1 to 5 and Comparative Examples 1 and 2 were evaluated.

The gas adsorption characteristics were measured by cutting the paper into 5 cm x 5 cm x 0.37 mm (width x length x thickness) and then exposing the paper to ethylene or ammonia gas for 7 days. The amount of ethylene or ammonia adsorbed thereafter was measured by the following method and is shown in Table 1 below.

The ethylene adsorption amount (μl / kg) and the ammonia adsorption amount (μl / kg) were carried out according to KS M 1998-4.

division Ethylene adsorption amount Ammonia adsorption amount Comparative Example 1 47 μl / kg 84 μl / kg Comparative Example 2 103 [mu] l / kg 152 [mu] L / kg Example 1 121 l / kg 203 [mu] l / kg Example 2 437 μl / kg 756 l / kg Example 3 368 μl / kg 581 μl / kg Example 4 384 μl / kg 623 l / kg Example 5 397 μl / kg 701 μl / kg

As can be seen in the above Table 1, it was confirmed that the gas-adsorbing paper of Examples 1 to 4 adsorbed ethylene and / or ammonia in an amount 3 to 100 times greater than that of the paper of Comparative Example 1 which does not include the porous carrier there was.

In addition, when the biodegradable polymer fiber and the porous carrier were mixed together and the paper pulp was papermakered (Comparative Example 2), the carrier was buried in the wood pulp in the papermaking process or the papermaking agent penetrated into the pore of the carrier, I can confirm that I can not show ability.

As a result, it has been found that the gas-adsorbing paper of the present invention has a harmful gas adsorption effect such as ethylene and ammonia and is very suitable as a wrapping paper for fresh foods and / or precision household appliances.

Experimental Example  2. Tensile strength measurement

The tensile strength of the paper prepared in Examples 1 to 4 and Comparative Example 1 was evaluated. The tensile strength was evaluated in accordance with KS M 7014. The measured tensile strengths are shown in Table 2 below.

division Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Example 4 Example 5 Tensile strength (kN / m) 23.69 20.39 29.03 37.22 36.69 36.39 21.57

As can be seen in Table 2 above, Examples 1 to 4, which are gas adsorptive papers produced by adding a porous carrier, showed improved strength compared to the paper of Comparative Example 1. [

Further, in the case of Example 5 where the length of the biodegradable polymer fiber is long, the hydrophobic polymer fibers are not bonded to the hydrophilic wood pulp, and the polymer fibers are bundled together, resulting in failure to exhibit high strength I could.

Furthermore, it was confirmed that the biodegradable polymer fiber and the porous carrier were mixed with each other to give a paper pulp and paper (Comparative Example 2), respectively.

Accordingly, the gas-absorbing paper of the present invention can provide a wrapping paper having an effect of having less strength of the packaging paper than the paper which does not include the conventional porous carrier.

As can be seen from the above Examples, Comparative Examples and Experimental Examples, the gas-absorbing paper of the present invention has an effect of effectively adsorbing ethylene and / or ammonia with improved tensile strength, It can be seen that the wrapping paper is more suitable than the wrapping paper not including the conventional porous carrier.

Claims (13)

A gas-absorbing fiber comprising a porous carrier and a biodegradable polymer having an average diameter of 10 to 40 탆, a pore size of 0.1 to 1.0 nm and a BET specific surface area of 300 to 700 m 2 / g; And
Paper-forming component; / RTI >
Wherein the biodegradable polymer comprises at least one of polylactic acid (PLA) and polybutylene succinate (PBS). delete The packaging paper composition according to claim 1, wherein the gas-absorbing fiber comprises 10 to 100 parts by weight of a porous carrier based on 100 parts by weight of the biodegradable polymer. The packaging paper composition according to claim 1, wherein the porous carrier comprises at least one member selected from the group consisting of bermucurite, zeolite, germanium and bentonite. delete delete The packaging paper composition according to claim 1, wherein the gas-adsorbing fiber has an average fiber length (average fiber length) of 5.0 to 25 mm and a fineness of 5 to 100 denier. The packaging paper composition according to any one of claims 1 to 3, which comprises 1 to 50% by weight of gas-adsorbing fibers in the entire packaging composition. The packaging paper composition according to claim 1, wherein the paper-forming component is pulp. A packaging paper excellent in gas adsorptivity, which comprises a packaging paper composition excellent in gas adsorptivity according to any one of claims 1, 3, 4 and 7 to 9. The wrapping paper according to claim 10, wherein the wrapping paper having excellent gas adsorbing ability has an average thickness of 0.1 to 0.5 mm. delete (1) preparing a fiber composition by mixing a porous carrier and a biodegradable polymer;
(2) extruding the fiber composition at a temperature of from 150 to 230 DEG C at a pressure of from 1.0 to 2.5 bar to produce a gas-absorbing fiber;
(3) mixing the gas-adsorbable fiber and the paper-forming component to produce a mixture; And
(4) papermaking the mixture to produce a gas-adsorbing paper;
Lt; / RTI >
The porous carrier has an average diameter of 10 to 40 μm, a pore size of 0.1 to 1.0 nm and a BET specific surface area of 300 to 700 m 2 / g,
Wherein the biodegradable polymer comprises at least one of polylactic acid (PLA) and polybutylene succinate (PBS).

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