KR101720537B1 - Moisture absorbent film composition and product using moisture absorbent - Google Patents
Moisture absorbent film composition and product using moisture absorbent Download PDFInfo
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- KR101720537B1 KR101720537B1 KR1020150132883A KR20150132883A KR101720537B1 KR 101720537 B1 KR101720537 B1 KR 101720537B1 KR 1020150132883 A KR1020150132883 A KR 1020150132883A KR 20150132883 A KR20150132883 A KR 20150132883A KR 101720537 B1 KR101720537 B1 KR 101720537B1
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides 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
- 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
- C08L23/06—Polyethene
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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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
The present invention relates to a composition for a dehumidifying film excellent in corrosion resistance and dehumidification property, and a dehumidifying film and a dehumidifying and shrinking film using the same. More particularly, the present invention relates to a dehumidifying film and a dehumidifying and shrinking film using the same, And is excellent in mechanical strength such as elongation, shrinkage and impact resistance, so that it can be applied to various automobile, shipbuilding, heavy industrial parts, and parts packaging fields of iron metal.
Description
The present invention relates to a dehumidifying film composition and a dehumidifying film product using calcium magnesium acetate and sodium carbonate. More particularly, the present invention relates to a dehumidifying film having excellent corrosion resistance and hygroscopicity, and a dehumidifying shrinkable film containing the same.
As the heavy industry, shipbuilding and automobile industry develops, there are problems such as corrosion of metal products in manufacturing, transportation and storage of parts and materials in the field of industry using all kinds of metal materials, and the industrial loss Is increasing.
Conventionally, various methods such as anti-corrosive oil, grease, paint, plating, silica and the like have been used to prevent corrosion of metallic products, but there have been problems such as limitations in application, workability and post-treatment . Shrink films have been widely used for packaging materials (industrial pallets, containers, parts, etc.) for large or small scale products. In addition, a hygroscopic agent has been used to prevent parts and products from being corroded or rusted due to moisture during transportation or storage. Since the hygroscopic agent is used in the form of a small pouch, , There is a problem that the internal moisture absorbent is contaminated on the surface of the product and the merchantability is lowered. In addition, when condensation occurs on the contact surface between the shrink film and the metal product, it causes corrosion. In the case of the pouch type product, moisture generated on the metal contact surface can not be removed. Therefore, the shrink film itself needs a function of moisture absorption at the interface between the shrink film and the metal.
The present invention for solving the above problems is to provide a corrosion resistant film composition for dehumidification which is environmentally friendly and can be applied not only to ensure corrosion resistance and dehumidification but also to improve the processability of extrusion molding, And to provide a dehumidifying shrinkable film containing the same.
The dehumidifying composition according to the present invention comprises (A) 10 to 50% by weight of a hygroscopic agent selected from the group consisting of calcium magnesium acetate (CMA) and sodium carbonate or a mixture thereof, (B) 1 to 5% by weight of a superabsorbent resin, 5 to 20% by weight of a water-repellent inorganic compound, and (D) 30 to 70% by weight of a low-density polyethylene (LDPE) resin.
In the present invention, the moisture absorbent may further include a hygroscopic agent known in the art such as calcium magnesium acetate (CMA) and sodium carbonate in addition to magnesium chloride and magnesium oxide, but most preferably calcium magnesium acetate (CMA) It is good because it is excellent in rust prevention property.
In the present invention, the waterproof inorganic compound may be selected from Na-bentonite, talc, and calcium carbonate, but is not limited thereto. The average particle diameter of the waterproof inorganic compound may be 5 to 100 탆.
In the present invention, the superabsorbent resin may be any one or more selected from propylene-acrylic acid-highly hygroscopic resin, carboxymethylcellulose, starch, and modified products thereof, but is not limited thereto.
In the present invention, the low density polyethylene (LDPE) resin may have a melt index (ASTM D 1238) of 5 to 30 g / 10 min, but is not limited thereto.
In the present invention, the composition for the dehumidifying film may include polyethylene wax;
At least one fluidizing agent selected from barium stearate, calcium stearate, magnesium stearate, zinc stearate, ethylene bis stearamide, propylene bis stearamide dimethyl polysiloxane, diethyl polysiloxane, and acrylate dimethyl polysiloxane;
And the additive may further comprise one or more additives selected from the group consisting of
Another aspect of the present invention relates to a dehumidifying film and a dehumidifying shrinkable film comprising a composition for a dehumidifying film.
(A) 10 to 50% by weight of a hygroscopic agent selected from calcium magnesium acetate (CMA) and sodium carbonate or a mixture thereof, (B) 1 to 5% by weight of a superabsorbent resin, (C) 20 to 40% by weight of a composition for a dehumidifying film comprising 5 to 20% by weight of a water-repellent inorganic compound, 30 to 70% by weight of a low density polyethylene (LDPE) resin, and 60 to 80% by weight of a low density polyethylene (LDPE) And a dehumidifying film comprising at least one layer of a hygroscopic film layer prepared by mixing.
(A) 10 to 50% by weight of a hygroscopic agent selected from the group consisting of calcium magnesium acetate (CMA) and sodium carbonate or a mixture thereof, (B) 1 to 5% by weight of a superabsorbent resin, (C) 20 to 40% by weight of a composition for a dehumidifying film comprising 5 to 20% by weight of a compound, (D) 30 to 70% by weight of a low density polyethylene (LDPE) resin, and 60 to 80% by weight of a low density polyethylene (LDPE) A produced hygroscopic film layer,
To a dehumidifying shrink film laminated with a shrink film layer containing low density polyethylene (LDPE) and an elastomer.
In the present invention, the shrinkable film layer may contain 10 to 30% by weight of an elastomer, but is not limited thereto.
In the present invention, the elastomer may be one or more selected from styrene-ethylene-butylene-styrene copolymer and ethylene-octene copolymer, but is not limited thereto.
In the present invention, the thickness of the hygroscopic film layer may be 30 to 50 占 퐉 and the thickness of the shrink film layer may be 150 to 200 占 퐉, but the present invention is not limited thereto.
The present invention is superior in corrosion resistance by using calcium magnesium acetate and sodium carbonate as a hygroscopic agent and also has excellent hygroscopicity by using a highly hygroscopic resin in combination and has excellent mechanical strength such as elongation, shrinkage and impact resistance, It can be applied to heavy industry parts and parts of ferrous metal parts.
1 shows an embodiment of a dehumidifying / shrinking film. The dehumidification shrinkable film of the present invention may have a double structure composed of the
2 shows the temperature and humidity cycle for the rust prevention test.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a composition for a dehumidifying film and a dehumidifying / shrinking film containing the same according to the present invention will be described in detail with reference to the accompanying drawings or embodiments. It should be understood, however, that the invention is not limited thereto and that various changes and modifications may be made without departing from the spirit and scope of the invention.
Unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention is merely intended to effectively describe a specific embodiment and is not intended to limit the invention.
In addition, the following drawings are provided as examples for allowing a person skilled in the art to sufficiently convey the idea of the present invention. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms, and the drawings presented below may be exaggerated in order to clarify the spirit of the present invention. Also, throughout the specification, like reference numerals designate like elements.
Also, the singular forms as used in the specification and the appended claims are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The dehumidifying composition according to the present invention comprises (A) 10 to 50% by weight of a hygroscopic agent selected from the group consisting of calcium magnesium acetate (CMA) and sodium carbonate or a mixture thereof, (B) 1 to 5% by weight of a superabsorbent resin, 5 to 20% by weight of a water-repellent inorganic compound, and (D) 30 to 70% by weight of a low-density polyethylene (LDPE) resin.
In the present invention, the moisture absorbent may further include a hygroscopic agent commonly used in this field such as calcium magnesium acetate (CMA) and sodium carbonate in addition to magnesium chloride and magnesium oxide, but most preferably calcium magnesium acetate CMA) may be used alone. It is preferable to use 10 to 50% by weight, more preferably 10 to 30% by weight, of the moisture absorber. If the moisture absorber is used in an amount of less than 10% by weight, the moisture absorption capacity of the dehumidifying film may deteriorate. When used, compounding extrusion processability can not be ensured.
Particularly, calcium magnesium acetate (CMA) has a characteristic of being resistant to corrosion as compared with other hygroscopic agents, and has less problem of separation into a liquid phase from a film because of low compromise compared with magnesium chloride and sodium carbonate. However, when calcium magnesium acetate (CMA) alone is used, there is a limitation in lowering the hygroscopicity. As a result of studies, it has been found out that hygroscopicity can be further improved by using a super absorbent polymer Thereby completing the present invention.
Further, in the present invention, the super absorbent polymer prevents the moisture absorbent from liquefaction due to deliquescence after processing the film. As the superabsorbent resin, commercially available examples of the propylene-acrylic acid-highly hygroscopic resin include GS 4800 manufactured by LG Chemie. In addition, one or two or more selected from the group consisting of carboxymethyl cellulose, starch, But is not limited thereto. The superabsorbent resin may be used in an amount of 1 to 5% by weight, more preferably 1 to 3% by weight. When the amount of the superabsorbent resin is less than 1% by weight, separation of the deliquescent hygroscopic agent can not be suppressed. A problem of shrinkage and foaming may occur during extrusion processing.
The inventors of the present invention used water as a cooling method in the production of extrusion molding using a moisture absorbent. Such a cooling method has problems such as foaming and shrinkage during processing. In order to solve such a problem, conventional waterproof inorganic compounds such as bentonite and talc can be used to inhibit the conventional foaming and shrinkage during production, thus completing the present invention.
In order to impart extrusion forming workability in the present invention, one or two or more selected from water-soluble inorganic substances such as Na-bentonite, talc and calcium carbonate can be mentioned, but the present invention is not limited thereto, and most preferably Na- .
Na-bentonite (hereinafter referred to as sodium bentonite) is a commercial term for clay with smectite as its main constituent mineral, and its specific clay character depends on the crystal chemistry of the smectite mineral. One of the most unique properties of sodium bentonite is its hydrophilic properties against water and sodium bentonite is a kind of clay mineral which expands when it comes into contact with water. It absorbs up to 5 times its own weight when it comes in contact with water, Expands to 15 times. Therefore, it is used as a waterproof material by these characteristics. During the above extrusion molding, cracking occurs on the surface due to foaming, which expands between the cracks due to the expansion of sodium bentonite, thereby preventing the penetration of cooling water in the extrusion process.
The waterproof inorganic compound is preferably used in an amount of from 5 to 20% by weight, more preferably from 10 to 15% by weight, and if it is used in an amount of less than 5% by weight, problems of foaming and shrinkage of the composition for a dehumidifying film If it is used in an amount exceeding 20% by weight, its absorption capacity may be lowered.
The average particle diameter of the waterproof inorganic compound may be 5 to 100 탆, but is not limited thereto. When the thickness is less than 5 탆, coating defects may occur during film formation, and when the thickness exceeds 100 탆, problems of blow extrusion may occur.
The composition for the dehumidifying film is preferably prepared in the form of a master batch so that it can be readily miscible in the production of the film, and then mixed with the low density polyethylene to prepare a film. Among the composition for the dehumidifying film, the low density polyethylene is used to serve as a base material of the master batch, and it is 30 to 70% by weight. More preferably from 40 to 60% by weight. The low density polyethylene preferably has a melt index according to ASTM D1238 of 5 to 30 g / 10 min. When the melt index is in the above range, defects do not occur in the film to be produced, so that extrusion processing is easy.
The low-density polyethylene used for producing the film may be the same or different from the low-density polyethylene among the compositions for the dehumidifying film.
In addition, in the present invention, the composition for a dehumidifying film may contain polyethylene wax;
At least one fluidizing agent selected from barium stearate, calcium stearate, magnesium stearate, zinc stearate, ethylene bis stearamide, propylene bis stearamide dimethyl polysiloxane, diethyl polysiloxane, and acrylate dimethyl polysiloxane;
And the additive may further comprise one or more additives selected from the group consisting of
The polyethylene wax is used as an internal activator in extrusion processing. The content of the polyethylene wax is not limited, but it is preferably 0.1 to 10% by weight, more preferably 1 to 5% by weight. When the content is less than 0.1% by weight, the effect is insignificant. When the content is more than 10% by weight, blooming may occur.
The fluidizing agent may be a stearate derivative, a stearamide derivative, a polysiloxane derivative or a mixture thereof. Specific examples thereof include stearate derivatives such as barium stearate, calcium stearate, magnesium stearate and zinc stearate; stearamide derivatives such as ethylene bis stearamide and propylene bis stearamide; and stearamide derivatives such as dimethyl polysiloxane, diethyl polysiloxane, And the like can be used. The content of the fluidizing agent is not limited, but is preferably 0.1 to 10% by weight, more preferably 1 to 5% by weight. If it is less than 0.1% by weight, the effect is insignificant. If it is used in excess of 10% by weight, the problem of blooming and the physical properties of the composition may be affected.
The dehumidifying film composition according to the present invention may further contain additives such as an antistatic agent, an ultraviolet stabilizer, an antioxidant, and a light absorber, depending on the purpose. The amount of the additive can be adjusted freely according to the purpose, and the present invention is not limited thereto, but it is preferable to add 0.01 to 5 parts by weight to 100 parts by weight of the dehumidifying film composition.
The dehumidification film composition according to the present invention minimizes foaming, shrinkage and moisture penetration of the extrusion molding process, thereby maximizing the blow extrusion processability and processing a dehumidifying film having good corrosion resistance.
The present invention can be made into a dehumidifying film by processing the dehumidifying film composition. In this case, the production method is not limited, and a method commonly used in the art, such as a casting method or an extrusion method, may be used.
In addition, the dehumidifying film produced in the above can provide a dehumidifying shrink film by a shrink film using an elastomer and a dry lapping process.
Specifically, one embodiment of the dehumidifying film of the present invention comprises (A) 10 to 50% by weight of a hygroscopic agent selected from the group consisting of calcium magnesium acetate (CMA) and sodium carbonate or a mixture thereof, (B) 1 to 5 (D) 20 to 40% by weight of a composition for a dehumidifying film comprising 30 to 70% by weight of a low density polyethylene (LDPE) resin, 60 to 60% by weight of a low density polyethylene (LDPE) And 80% by weight of the moisture-absorbing film layer.
(A) 10 to 50% by weight of a hygroscopic agent selected from the group consisting of calcium magnesium acetate (CMA) and sodium carbonate or a mixture thereof, (B) 1 to 5% by weight of a superabsorbent resin, 20 to 40% by weight of a composition for a dehumidifying film comprising (C) 5 to 20% by weight of a water-repellent inorganic compound, (D) 30 to 70% by weight of a low density polyethylene (LDPE) resin, % By weight of a moisture-absorbing film layer,
And a shrink film layer including low density polyethylene (LDPE) and an elastomer may be a laminated dehumidification shrink film.
At this time, the lamination may be a lamination using coextrusion or an adhesive. The adhesive may be a laminate of a dry type acrylic adhesive using a solvent type acrylic adhesive.
In the present invention, the shrinkable film layer preferably contains an elastomer in an amount of 10 to 30% by weight, more preferably 15 to 20% by weight. When the amount of the elastomer is less than 10% by weight, the effect of improving the physical properties is insignificant. When the amount of the elastomer is more than 30% by weight, rubber particles may be unevenly formed on the surface of the film during the blowing process, Roughness may cause irregular reflection of visible light, which may cause the transparency and gloss of the film to deteriorate.
The content of the low-density polyethylene may be 70 to 90% by weight, and more preferably 80 to 95% by weight. The linear low-density polyethylene resin and the elastomer exhibit excellent mechanical strength, and exhibit a synergistic effect of elongation, impact resistance and shrinkability by mixing with a low-density polyethylene resin.
In the present invention, the elastomer may be rubber or a thermoplastic elastomer exhibiting rubber properties at room temperature. Specifically, the elastomer may be selected from styrene-ethylene-butylene-styrene copolymer, ethylene-octene copolymer But may be any one or two or more, but is not limited thereto.
At this time, the styrene-ethylene-butylene-styrene copolymer (SEBS) preferably has a butylene content of 10 to 40% by weight, but is not limited thereto. If the content of butylene is less than 10% by weight, improvement in mechanical strength such as impact strength of the processed film can not be obtained. If it exceeds 40% by weight, optical properties such as transmittance and haze decrease, have. SEBS rubber is a copolymer in which styrene block, ethylene block and butylene block have different glass transition temperatures (T g ). The glass transition temperature of the styrene block portion is 90 to 100 ° C. and the glass transition temperature Is preferably -120 to -40 < 0 > C. Since the butadiene and ethylene block portions having a relatively low glass transition temperature maintain the gum properties at room temperature, improvement of the mechanical properties such as elongation and impact resistance of the heat shrinkable film and improvement of the shrinkability and the packaging condition after shrinkage can be brought about.
As the elastomer, styrene-ethylene-butylene-styrene copolymer (SEBS) is used for imparting the flexibility, elasticity and cold resistance of the shrink film composition and can be used alone or in combination with an ethylene- When used, the content thereof is preferably 40 to 60% by weight of the total content of the elastomer, and more preferably 45 to 55% by weight for heat shrinkability, mechanical strength and transparency of the film.
As the elastomer, the ethylene-octene copolymer is used for imparting the flexibility and elasticity of the shrinkable film, and may be used alone or in combination with a styrene-ethylene-butylene-styrene copolymer. When the elastomer is used in combination, And 60 to 40% by weight of the total amount thereof. As the content thereof increases, physical properties such as drop impact strength and elongation are greatly improved, but shrinkability may be lowered if the content is out of the above range.
In one embodiment of the present invention, the hygroscopic film layer may be prepared by mixing 20 to 40% by weight of a composition for a dehumidifying film and 60 to 80% by weight of a low density polyethylene (LDPE) resin. More specifically, (LDPE) resin in an amount of 25 to 35% by weight and a low density polyethylene (LDPE) resin in an amount of 65 to 85% by weight.
The low density polyethylene (LDPE) resin may be the same as or different from the low density polyethylene (LDPE) resin used in the composition for the dehumidification film. The present invention can provide a film having uniform physical properties since the composition for a dehumidifying film is first prepared and then mixed with a low density polyethylene (LDPE) resin to produce a film.
In one embodiment of the present invention, the thickness of the hygroscopic film layer is 30 to 50 탆 and the thickness of the shrink film layer is 150 to 200 탆, but the present invention is not limited thereto.
The shrinkable film layer may be formed into a single layer film using a hollow extruder with a thickness of 150 to 200 탆 and then dry-laminated using the hygroscopic film layer and a solvent type acrylic adhesive.
Hereinafter, the present invention will be described in more detail based on examples and comparative examples. However, the following examples and comparative examples are merely examples for explaining the present invention in more detail, and the present invention is not limited by the following examples and comparative examples.
The composition of the composition prepared according to the present invention and the method for measuring the physical properties thereof are as follows.
(Composition)
The materials used in the following examples and comparative examples are shown in Table 1 below.
Absorption rate 1.42 ml / sec
(Extrusion molding processability, blow molding processability)
The extrusion molding processability was evaluated by visual observation of the foam, shrinkage and moisture state of the processed pellets. The processability of the hollow extrusion molding was evaluated by whether or not the produced film was processed. The results are shown in Table 3.
?: Very good (when foaming and shrinkage did not occur)
△: Normal (when some shrinkage occurred)
X: poor (when both foaming and shrinking occurred)
(Hygroscopic)
The hygroscopicity of the hygroscopic film is measured by taking a sample of 100 mm length and 100 mm width from the hygroscopic film and measuring the moisture absorption rate after 7 days of exposure at 50 ± 2 ° C. and 50 ± 5% relative humidity using a thermo-hygrostat, The moisture absorption rate of the film is shown in Table 3 below.
Absorption rate (%) = (final weight - initial weight) / initial weight × 100
(Rust prevention)
The 1010 steel sheet with a size of 90 × 50 mm was completely sealed with a dehumidifying film using ethanol and acetone, and then exposed to a temperature and humidity cycle of 25 to 55 ° C. and a relative humidity of 93 to 95% for 30 cycles using a thermo-hygrostat, Were visually evaluated.
[Example 1]
1) Preparation of a moisture absorption film layer
The compositions shown in the following Table 2 were mixed, put into an extruder heated at an average temperature of 120 占 폚, heated and melted to prepare pellets. The prepared pellets were mixed with low density polyethylene (5301, Hanwha Chemical) to a weight ratio of 30 wt% to 70 wt%, and then extruded to a thickness of 40 μm using a hollow extruder to prepare a moisture absorption film.
2) Production of shrink film layer
85% by weight of low-density polyethylene (5301, Hanwha Chemical) and 15% by weight of the ethylene-octene copolymer shown in Table 1 were mixed using a tumbling mixer and then heated and melted by an extruder heated to 200 ° C to be pelletized. Mu] m thickness using a hollow extruder.
The extruder used a die with a diameter of 280 mm and a die gap of 2 mm. The film was processed at an extrusion temperature of 170 ° C and a BUR ratio of 1: 2 to 1: 2.5.
3) Production of dehumidifying shrink film
The produced moisture-absorbing film and shrink film were dry-lined using a solvent type acrylic adhesive (CS-9097, CS-9097) at a temperature of 80 ° C to prepare a dehumidifying shrink film.
The physical properties of the prepared film were measured and are shown in Table 3 below.
[Examples 2 to 5 and Comparative Examples 1 and 2]
A dehumidifying shrinkable film was prepared in the same manner as in Example 1, except that the composition shown in Table 2 was used in the preparation of the moisture absorption film layer.
(weight%)
As shown in Table 3, it was found that the films of Examples 1 to 5 had good processability and excellent moisture absorption rate and rustproofing property.
In Comparative Examples 1, 2, 4, 7, and 8, the film was not processed and foamed, and the moisture absorption rate and rustproofing property could not be measured.
In addition, in the case of Comparative Example 3, it was found that the rust preventive property was not expressed because it did not contain the moisture absorber of the present invention.
In the case of Comparative Example 5, extrusion molding workability including sodium bentonite was exhibited, but when the superabsorbent resin was not included, the hollow formability was poor and the moisture absorption rate was lowered compared with Example 3 using the same amount of the moisture absorber Could know.
In the case of Comparative Example 6, extrusion molding workability was exhibited including sodium bentonite, but when the superabsorbent resin was not included, the hollow formability was poor and the moisture absorption rate was lowered than in Example 2 using the same amount of the moisture absorber Could know.
Claims (12)
Wherein the waterproof inorganic compound is at least one selected from sodium bentonite, talc, and calcium carbonate.
Wherein the waterproof inorganic compound has an average particle diameter of 5 to 100 占 퐉.
Wherein the superabsorbent resin is at least one selected from the group consisting of propylene-acrylic acid-high hygroscopic resin, carboxymethylcellulose, starch and modified products thereof.
Wherein the low density polyethylene (LDPE) resin has a melt index (ASTM D 1238) of 5 to 30 g / 10 minutes.
Polyethylene wax;
At least one fluidizing agent selected from barium stearate, calcium stearate, magnesium stearate, zinc stearate, ethylene bis stearamide, propylene bis stearamide dimethyl polysiloxane, diethyl polysiloxane, and acrylate dimethyl polysiloxane;
By weight based on the total weight of the composition.
A dehumidifying shrink film laminated with a shrink film layer produced by mixing low density polyethylene (LDPE) and an elastomer.
Wherein the shrinkable film layer comprises 10 to 30% by weight of an elastomer.
Wherein the elastomer is at least one selected from a styrene-ethylene-butylene-styrene copolymer, and an ethylene-octene copolymer.
Wherein the dehumidifying and shrinking film has a thickness of the moisture absorption film layer of 30 to 50 占 퐉 and a thickness of the shrinkage film layer of 150 to 200 占 퐉.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101825698B1 (en) * | 2017-06-08 | 2018-02-05 | 주식회사 데시칸트 | Anti-release moisture absorbent for automobile lamp and absorbent product including the same |
| KR102145245B1 (en) * | 2020-03-20 | 2020-08-20 | 대영합성 주식회사 | Air-cap for packing |
| WO2020165286A1 (en) * | 2019-02-14 | 2020-08-20 | Abu Dhabi Polymers Co. Ltd (Borouge) L.L.C. | Extruded article made of self-sealing polyolefin composition |
| KR20200128290A (en) * | 2019-05-02 | 2020-11-12 | 씨에스씨주식회사 | Environmentally friendly hygroscopic agent for automobile lamp |
| KR20210051728A (en) * | 2019-10-31 | 2021-05-10 | 주식회사 데시칸 | High Performance Moisture Absorbent Product |
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| KR101825698B1 (en) * | 2017-06-08 | 2018-02-05 | 주식회사 데시칸트 | Anti-release moisture absorbent for automobile lamp and absorbent product including the same |
| WO2020165286A1 (en) * | 2019-02-14 | 2020-08-20 | Abu Dhabi Polymers Co. Ltd (Borouge) L.L.C. | Extruded article made of self-sealing polyolefin composition |
| CN113811570A (en) * | 2019-02-14 | 2021-12-17 | 阿布扎比聚合物有限公司(博禄) | Extruded articles made from self-sealing polyolefin compositions |
| KR20200128290A (en) * | 2019-05-02 | 2020-11-12 | 씨에스씨주식회사 | Environmentally friendly hygroscopic agent for automobile lamp |
| KR102401294B1 (en) * | 2019-05-02 | 2022-05-26 | 씨에스씨주식회사 | Environmentally friendly hygroscopic agent for automobile lamp |
| KR20210051728A (en) * | 2019-10-31 | 2021-05-10 | 주식회사 데시칸 | High Performance Moisture Absorbent Product |
| KR102286558B1 (en) | 2019-10-31 | 2021-08-06 | 주식회사 데시칸 | High Performance Moisture Absorbent Product |
| KR102145245B1 (en) * | 2020-03-20 | 2020-08-20 | 대영합성 주식회사 | Air-cap for packing |
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