KR20170068046A - Biodegradable nanoparticle-based resin composition and porous thin film using the same - Google Patents
Biodegradable nanoparticle-based resin composition and porous thin film using the same Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0869—Acids or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The present invention relates to a biodegradable nanoparticle-based resin composition and a biodegradable breathable film using the same. More particularly, the present invention relates to a biodegradable breathable film using a polyolefin- A resin composition to which a batch is added, and a biodegradable breathable film produced using the resin composition.
The biodegradable nanoparticle-based resin composition according to the present invention can be reduced in weight by reducing the specific gravity by adding a small amount of nano-sized inorganic particles, and the micropores can be effectively generated to improve the breathability. In addition, dispersibility is increased through addition of a highly-dispersible resin, and it is possible to produce a thin film type air permeable film excellent in mechanical properties.
Description
The present invention relates to a biodegradable nanoparticle-based resin composition and a biodegradable breathable film using the same. More particularly, the present invention relates to a biodegradable breathable film using a polyolefin- A resin composition to which a batch is added, and a biodegradable breathable film produced using the resin composition.
The air permeable film has the characteristic that micro-pores exist in the film, so that water droplets of a large size do not pass through but only water vapor of a small size passes through them. Therefore, diapers, training pants, sanitary napkins, sanitary panties, It is a functional film which is used for ventilation and breathing in various fields such as absorbent products for body protection such as medical clothes, and building materials for preventing condensation such as house wrap.
As a typical breathable film, a film made of a polyolefin has been developed and widely spread, however, the polyolefin breathable film is not decomposed or decomposed in the natural world when it is disposed of after use, and a long time is required for decomposition. Particularly, As a disposable product, it is known that it has disadvantages that it is discarded without being recycled after use, thereby causing environmental pollution.
In order to solve these problems, various methods using a polymer capable of decomposing at the time of disposal have been considered. One of the methods is proposed to utilize a biodegradable resin having decomposable properties by microorganisms. Currently, starch based resins and biodegradable polyester based resins have been researched and developed as representative biodegradable resins, but they have not been commercialized. Starch-based resin such as modified starch is economical because it is low in cost, but it is known that mechanical properties such as rigidity are extremely weak. Biodegradable polyester resin is required to be priced at several times higher than polyethylene-based air-permeable film, so it is suitable as a disposable product And is not commercially adopted (see Patent Document 1).
As a solution to this problem, the economical efficiency is improved by reducing the cost by using a composition comprising a biodegradable polyester resin added with an inexpensive inorganic particle such as calcium carbonate, but the dispersibility of the added inorganic particles is decreased, And the decomposition was accelerated (see Patent Document 2). There is also a method of obtaining an air-permeable film by adding an excess amount of inorganic particles having a small particle diameter of several micrometers to a polyolefin-based resin such as polyethylene or polypropylene in an excess amount, melt-forming the film and stretching to form fine pores between the polyolefin- However, it is known that not only the mechanical properties are deteriorated due to the excessive inorganic particles but also the mechanical properties are deteriorated due to the formation of the pores after stretching, so that the film formed during thinning tends to be easily torn. Accordingly, there is a need for an epoch-making technique for manufacturing a composition and a film which can overcome the thickness limit, have high strength and high moisture permeability, and have biodegradability.
On the other hand, the recent demand for breathable films used for diaper applications is reduced in weight. When lightweight, it is not only comfortable to wear, but also increases portability and economical efficiency, and studies are being conducted to develop ultra lightweight breathable films. Further, studies have been focused on thinning of a film in order to manufacture a film which can be cost-reduced so as to be suitable for use as a disposable article.
Under these circumstances, the inventors of the present invention have made extensive efforts to develop a thin film type air permeable film exhibiting environmentally friendly biodegradability while maintaining mechanical properties and moisture permeability. As a result, it has been found that by using a polyolefin-based and polyurethane- It has been confirmed that a biodegradable breathable film having high strength and high moisture permeability can be produced by producing a film using a resin composition to which a master batch composed of an acid resin is added.
An object of the present invention is to provide a biodegradable nanoparticle-based resin composition to which a master batch containing nano-inorganic particles and a highly-dispersible resin is added using a composite resin of a polyolefin-based resin and a polyurethane-based resin as a matrix.
Another object of the present invention is to provide a thin film breathable film obtained by melt-extruding the biodegradable nanoparticle-based resin composition.
However, the problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.
In order to achieve the above object, a first aspect of the present invention provides a biodegradable nanoparticle-based resin composition comprising the following components:
a) a blend resin of a polyolefin resin and a polyurethane resin; And
b) 1) nano-inorganic particles having an average particle diameter of 1 to 500 nm;
2) ethylene-carboxylic acid copolymers; And
3) A master batch containing a polyurethane resin containing a functional group.
The biodegradable nanoparticle-based resin composition of the present invention is characterized by containing 30 to 150 parts by weight of the component b) based on 100 parts by weight of the component a).
The master batch (component b) contained in the biodegradable nanoparticle-based resin composition of the present invention may contain nano-inorganic particles having an average particle size of 1 to 500 nm in an amount of 30 to 50% by weight based on the total weight of the masterbatch .
The second aspect of the present invention relates to a composite resin of a polyolefin resin and a polyurethane resin; And a master batch containing a nano-inorganic particle having an average particle diameter of 1 to 500 nm, an ethylene-carboxylic acid copolymer, and a polyurethane-based resin containing a functional group, is melt-extruded and stretched A thin film breathable film is provided.
Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.
Throughout this specification, the term "combination thereof" included in the expression of the machine form means one or more combinations or combinations selected from the group consisting of the constituents described in the expression of the machine form, And the like.
Hereinafter, the biodegradable nanoparticle-based resin composition according to the present invention and the thin film breathable film using the same will be described in detail.
The biodegradable nanoparticle-based resin composition of the present invention comprises: (a) a composite resin of a polyolefin resin and a polyurethane resin; And b) a master batch comprising 1) nano-inorganic particles having an average particle diameter of 1 to 500 nm, 2) an ethylene-carboxylic acid copolymer, and 3) a polyurethane resin containing a functional group.
In order to exhibit properties suitable for applications such as diapers and sanitary napkins, the breathable film needs a film material having environmentally friendly biodegradability in addition to excellent mechanical properties and high moisture permeability. In the biodegradable nanoparticle-based resin composition according to the present invention, fine pores can be effectively formed by adding nano-inorganic particles of 500 nm or less to improve air permeability, and a high-dispersible resin (ethylene-carboxylic acid copolymer and functional group Containing polyurethane resin), it is possible to solve the micro dispersion phenomenon caused by the aggregation of nanoparticles, and the compatibility of the polyolefin resin and the polyurethane resin with the composite resin is improved, and the mechanical properties are further improved It is possible to produce a thin film type film.
The biodegradable nanoparticle-based resin composition according to the present invention may contain 30 to 150 parts by weight of the masterbatch (component b)) relative to 100 parts by weight of the polyolefin resin and the composite resin (component a)) of the polyurethane resin have.
The composite resin may contain 5 to 95% by weight of a polyolefin resin and 5 to 95% by weight of a polyurethane resin based on the total weight of the composite resin.
The polyolefin-based resin may be at least one selected from the group consisting of ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, Norbornene, norbornene, ethylidene norbornene, phenyl norbornene, vinyl norbornene, dicyclopentadiene, 1,4-butadiene, 1,5-hexadiene, 1-hexadiene, Homopolymers or copolymers of olefin monomers selected from the group consisting of butadiene, 1,5-pentadiene, 1,6-hexadiene, styrene, alpha-methylstyrene, divinylbenzene and 3-chloromethylstyrene , But is not limited thereto and may be any as long as it is used in the art as a polyethylene resin. The polyolefin-based resin according to an embodiment of the present invention may be a polyolefin resin having a melt index (190 DEG C, load 2.16 Kg) in the range of 1 to 10 g / 10 min, but is not limited thereto.
The polyurethane resin may be a biodegradable ether-based polyurethane, a biodegradable ester-based polyurethane or a biodegradable carbonate-based polyurethane. However, the polyurethane-based resin is not limited thereto. Can be used. The polyurethane resin can be produced by a known production method (see Patent Document 3), or a commercially available product can be used.
The master batch contained in the biodegradable nanoparticle-based resin composition of the present invention contains nano-inorganic particles having an average particle diameter of 1 to 500 nm and a highly-dispersible resin, wherein the highly-dispersible resin is an ethylene-carboxylic acid copolymer and a functional group And is a polyurethane-based resin contained therein.
The master batch comprises 30 to 50% by weight of nano-inorganic particles having an average particle diameter of 1 to 500 nm, 20 to 50% by weight of an ethylene-carboxylic acid copolymer, and 20 to 50% of a polyurethane- % ≪ / RTI > by weight. If the content of the nano-inorganic particles is less than 30% by weight based on the total weight of the master batch, the cost of the master batch may be excessively high because the content of the highly-dispersible high-cost resin is increased. May be contained in a large amount and the strength may be lowered and the dispersibility may be lowered.
The nano-inorganic particles having an average particle diameter of 1 to 500 nm may be used. The nano-inorganic particles may be at least one selected from the group consisting of calcium carbonate, talc, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, calcium chloride, calcium sulfate, aluminum hydroxide, zinc oxide, magnesium hydroxide, titanium oxide, alumina, mica, And combinations thereof. However, the present invention is not limited thereto. The nanoparticles may be in the form of a plate, a needle or a sphere.
The ethylene-carboxylic acid copolymer may be an ethylene-carboxylic acid copolymer containing 2 to 30% by weight of an acid based on the total weight of the ethylene-carboxylic acid copolymer. When the acid content is less than 2% by weight based on the total weight of the ethylene-carboxylic acid copolymer, it is difficult to obtain a desired dispersing effect on the nano-inorganic particles. When the acid content exceeds 30% by weight, A screw extruder, a kneader, a snake barrel, a roll mill, and the like, so that the workability may be poor. The ethylene-carboxylic acid copolymer may have a melt index of 0.5 to 50 g / 10 min at 190 캜 and a load of 2.16 Kg. When the melt index is less than 0.5 g / 10 min, And the processability may be deteriorated. When the content exceeds 50 g / 10 min, the mechanical strength of the breathable film may be weakened.
The polyurethane resin containing the functional group is a polyurethane resin containing at least one functional group selected from the group consisting of a carboxylic acid group, a carboxylic acid salt, a sulfonic acid group, a sulfonic acid salt, a phosphoric acid group and a phosphoric acid salt in polyurethane But is not limited thereto. The salt may be one or more metal salts selected from the group consisting of alkali metals such as lithium, sodium and potassium, alkaline earth metals such as calcium, magnesium and barium, and transition metals such as zinc, cobalt, copper and iron, It is not.
The polyurethane resin containing the functional group is preferably a chain extender such as 1) an oligomer containing a functional group and having both hydroxyl groups, 2) a chain extender such as a polyol having 2 to 10 carbon atoms, and 3) 4,4'-diphenylmethane Can be produced through a urethane reaction using a diisocyanate compound such as diisocyanate, p -phenylene diisocyanate or toluylene diisocyanate, or a commercially available product can be purchased and used. The polyurethane resin containing the functional group may be a resin having a weight average molecular weight of 5,000 to 100,000. When the molecular weight is less than 5,000, the viscosity is low during the kneading operation and the fluidity is favorable. However, when the molecular weight exceeds 100,000, the viscosity is too high. It can be difficult.
The content of the ethylene-carboxylic acid copolymer and the polyurethane resin containing the functional group may vary depending on the content of the nano-inorganic particles, but the content of the ethylene- The carboxylic acid copolymer may be contained in an amount of 20 to 50% by weight, and the polyurethane resin containing a functional group may be contained in an amount of 20 to 50% by weight. If the content of the ethylene-carboxylic acid copolymer and the polyurethane resin containing the functional group is less than the above range, the improvement in dispersibility can not be expected. If the content exceeds the range, the cost of the high- The effect of saving can not be expected.
In the biodegradable nanoparticle-based resin composition of the present invention, when a master batch containing only nano-sized inorganic particles is used, the inorganic particles exhibiting hydrophilicity and the urethane groups contained in the biodegradable polyurethane- Dispersibility can be increased compared with the case where inorganic particles of micro units are added. However, in order to exhibit an improved dispersing ability to maintain excellent mechanical properties such as high strength, it is preferable to use an apparatus having excellent dispersing performance There is a difficulty in maintaining the dispersion time longer. As an alternative technique to overcome the above difficulties, the present invention improves the dispersibility by including an ethylene-carboxylic acid copolymer as a highly dispersible resin and a polyurethane resin containing a functional group in the master batch, The preparation of an increased film was possible (Table 1).
The carboxylic acid component of the polyurethane resin containing a carboxylic acid component and a salt of a carboxylic acid group or a carboxylic acid contained in the ethylene-carboxylic acid copolymer as a functional group is preferably selected from the group consisting of And the electrostatic attraction with the surface of the nano-inorganic particle having the hydrophilic property is formed, the dispersibility can be remarkably improved. In addition, the highly-dispersible resin is excellent in compatibility with a polyolefin-based and polyurethane-based composite resin used as a matrix of the resin composition of the present invention, and can exhibit a synergistic effect of further increasing mechanical properties.
The biodegradable nanoparticle-based resin composition of the present invention contains the ethylene-carboxylic acid copolymer and the polyurethane-based resin containing a functional group at the same time in the master batch, and has an effect of improving the dispersibility by the copolymer and the polyurethane resin, -Carboxylic acid copolymer and the biodegradability of polyurethane resin including functional group can be further increased.
To the biodegradable nanoparticle-based resin composition of the present invention, conventional additives such as a lubricant, an antioxidant, a processing aid, a white enhancer, a drying agent, a heat stabilizer, a fluorescent agent and the like may be blended to the extent that the object of the present invention is not impaired .
Hereinafter, a biodegradable nanoparticle-based resin composition of the present invention and a method for producing a thin film breathable film using the same will be described.
The biodegradable nanoparticle-based resin composition is prepared by mixing a mixture containing nano inorganic particles having an average particle size of 1 to 500 nm, an ethylene-carboxylic acid copolymer, and a functional group-containing polyurethane resin in a single screw extruder, a twin screw extruder, Kneading and dispersing the master batch pellets using rolls, chestnut mixers, kneaders or the like to prepare master batch pellets, and then blending the obtained master batch pellets and the polyolefin-based and polyurethane-based composite resin pellets.
The biodegradable nanoparticle-based resin composition pellets obtained in the above-described process can be dried in a drier and put into a hopper, thereby forming a disc sheet according to a conventional film forming apparatus and a molding method by extrusion. At this time, inflation molding by a circular die, extrusion molding by a T-die, and the like can be suitably employed. The uncoated sheet was extruded uniaxially in the range of 1.2 to 6.0 times the temperature between the glass transition point and the melting point or lower, and then the uniaxial stretching was carried out at a stretching temperature of 2 Axis stretching to obtain a biaxially stretched breathable film. In this case, a uniaxially stretched film produced by performing uniaxial stretching without biaxial stretching can also be used to obtain a film that meets the object of the present invention.
In the stretching step, if the stretching temperature is lower than the glass transition point, the film tears before the elongation exceeds the yield point and can not be stretched. When the stretching temperature exceeds the melting point, satisfactory ventilation is obtained due to the flow of the molecular chains none. When the stretching magnification is less than 1.2 times, sufficient air permeability can not be obtained. When the stretching magnification exceeds 6.0 times, breakage often occurs during the stretching process and the film can not be stably produced.
That is, the breathable film according to the present invention can be produced by any one of uniaxial or biaxial stretching methods, and can be stretched so that the total area stretching ratio is in the range of 1.2 to 36 times. When the total area stretching ratio is less than 1.2 times, sufficient air permeability can not be obtained, and the film hardens and the touch may be deteriorated. When the total area stretching ratio is more than 36 times, air permeability is excellent, but mechanical strength may be significantly lowered. The film after the stretching can be subjected to heat fixation to improve dimensional stability.
Another aspect of the present invention relates to a composite resin of a polyolefin-based resin and a polyurethane-based resin; And a master batch containing a nano-inorganic particle having an average particle diameter of 1 to 500 nm, an ethylene-carboxylic acid copolymer, and a polyurethane-based resin containing a functional group, is melt-extruded and stretched A thin film breathable film is provided.
The thin film breathable film according to the present invention can be made thin and lightweight by using the biodegradable nanoparticle-based resin composition described above, and can exhibit high strength, high moisture permeability, and environmentally friendly biodegradability. Accordingly, the breathable film according to the present invention can be applied to body absorbent products such as diapers, panties for training, sanitary panties, sanitary panties, bandages, bandages, medical clothing wraps, and products for preventing condensation such as house wrap And can be applied to a wide range of applications.
The biodegradable nanoparticle-based resin composition according to the present invention can be reduced in weight by reducing the specific gravity by adding a small amount of nano-sized inorganic particles, and the micropores can be effectively generated to improve the breathability. In addition, dispersibility is increased through addition of a highly-dispersible resin, and it is possible to produce a thin film type air permeable film excellent in mechanical properties.
Hereinafter, the present invention will be described in detail with reference to examples. However, these examples are intended to further illustrate the present invention, and the scope of the present invention is not limited to these examples.
Example : Preparation of biodegradable breathable film
[Example 1]
(Degussa, Aerosil OX50; Nano-Inorganic Particles N) having a mean particle diameter of 80 nm was prepared as a nano-inorganic particle, and a polyolefin-based highly disperse resin having a melt index (190 DEG C, 2.16 Kg) of 8.4 g / 10 min and an acid content of 11% by weight (ExxonMobil, Escor 5600; high-dispersible resin B1) was prepared. As a polyurethane high-acid-containing resin containing a functional group, a polyurethane resin containing a sulfonic acid sodium salt (Toyoboseki Co., Ltd., VYLON UR-8300; high-acid resin B2) was prepared.
A master batch pellet (B) was prepared by adding 50 weight% of nano-inorganic particles N, 25 weight% of high-dispersion resin B1 and 25 weight% of B2 to a kneader and kneading and dispersing. In the polyolefin-based and polyurethane-based composite resin, and as the polyolefin-based resin, melt index (190 ℃, 2.16 Kg) is 2.7 g / 10 min, a linear low density polyethylene (SK (weeks) a density of 0.932 g / cm 3, FT811 (Sejung C & M, Enfresin Grade BC-507; polyurethane resin A2) was prepared as the polyurethane resin, and the polyolefin-based and polyurethane-based resin Resin (A) was prepared. 50 parts by weight of the composite resin and 50 parts by weight of the master batch pellet (B) obtained above were dry blended to obtain a composition for a breathable film. The obtained composition was put into a hopper and a disc sheet was formed using a Ti-die molding machine having a screw diameter of 130 mm. The molded disc sheet was uniaxially stretched at a stretching ratio of 3.0 times at a stretching temperature of 50 占 폚 to prepare a thin film breathable film having a thickness of 10 占 퐉.
[Example 2]
Except that 100 parts by weight of the polyolefin-based and polyurethane-based composite resin (A) prepared in Example 1 was mixed with 100 parts by weight of the master batch pellets (B) in the mixing ratio of the composition for air- The same procedure as in Example 1 was carried out to prepare a thin film breathable film.
[Example 3]
Except that 100 parts by weight of the polyolefin-based and polyurethane-based composite resin (A) prepared in Example 1 was mixed with the master batch pellets (B) in a proportion of 150 parts by weight in the mixing ratio of the composition for air- The same procedure as in Example 1 was carried out to prepare a thin film breathable film.
[Example 4]
Thin film A thin film breathable film was produced in the same manner as in Example 1, except that uniaxial stretching at a stretching ratio of 5.0 times in the course of manufacturing the breathable film was performed.
[Comparative Example 1]
Except that a mixture obtained by adding, to 100 parts by weight of the polyolefin-based and polyurethane-based composite resin (A) prepared in Example 1, 14.3 parts by weight of only the nano-inorganic particles N without adding a high- A thin film breathable film was produced in the same manner as in Example 1.
[Comparative Example 2]
100 parts by weight of calcium carbonate (inorganic inorganic particles, made by Omiya Co., Ltd.) having an average particle diameter of 1.7 μm was added to 100 parts by weight of the polyolefin-based and polyurethane-based composite resin (A) prepared in Example 1 without adding a high- A thin film breathable film was prepared in the same manner as in Example 1 except that the mixture was used and the draw ratio was changed to 2.0 times.
Experimental Example : Evaluation of properties of biodegradable breathable film
[Tensile Properties]
(Kg / in 2 ) and elongation (%) of the films prepared in the above Examples and Comparative Examples were measured in accordance with the tensile strength and tensile elongation test methods of ASTM D882. (MD) and the width direction (TD) perpendicular to the running direction, the lowest value was recorded (sample size: length 100 mm x width 25 mm, tensile speed 500 mm / min, measurement temperature 23 ° C).
[Water vapor permeability]
The moisture permeability (g / m 2 · 24 hr) of the films prepared in the above Examples and Comparative Examples was measured (23 ° C., 90% RH) according to the test method of ASTM E96-63.
The compositions of the resin compositions according to Examples 1 to 4 and Comparative Examples 1 and 2 and the evaluation results of physical properties of the films are shown in Table 1 below.
Master Batch
(MDxTD)
(MDxTD)
(MDxTD)
100
Master batch B
50
100
Master batch B
100
100
Master batch B
150
100
Master batch B
50
100
14.3
100
100
//
As a result of evaluating and analyzing the physical properties of the thin film breathable film produced in the above example, the thin film breathable film of the present invention can exhibit excellent breathability over 5,000 g / m 2 24 hr while maintaining the conventional mechanical properties, It was confirmed that high mechanical properties and high moisture permeability could be exhibited when the high-dispersion resin was not introduced into the particles (Comparative Example 1) and when the general inorganic particles of several μm were used (Comparative Example 2).
The results show that the hydrogen bonding between the ethylene-carboxylic acid copolymer introduced into the highly-dispersible resin and the carboxylic acid component contained in the polyurethane resin containing the functional group and the surface of the nanophilic inorganic particle having the hydrophilic property, It is considered that the dispersibility is remarkably improved by the electrostatic attraction between the unsaturated acid component and the surface of the nano-inorganic particle having hydrophilic property. Further, it is considered that the highly-dispersible resin according to the present invention is a kind of a polyethylene-based copolymer and a polyurethane system, and is excellent in compatibility with a polyolefin-based and polyurethane-based composite resin to be additionally added, thereby exhibiting a synergistic effect of further increasing mechanical properties .
The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.
Claims (10)
a) a blend resin of a polyolefin resin and a polyurethane resin; And
b) 1) nano-inorganic particles having an average particle diameter of 1 to 500 nm;
2) ethylene-carboxylic acid copolymers; And
3) A master batch containing a polyurethane resin containing a functional group.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107353481A (en) * | 2017-08-16 | 2017-11-17 | 昆明鑫鑫大壮降解塑料技术有限公司 | A kind of preparation method of oxidative biodegradation shopping bag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107353481A (en) * | 2017-08-16 | 2017-11-17 | 昆明鑫鑫大壮降解塑料技术有限公司 | A kind of preparation method of oxidative biodegradation shopping bag |
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