JP2018087329A - Masterbatch resin composition, method for producing the same, and molded body containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a masterbatch resin composition which makes a hydrophilic component ooze out a surface of a final molded body, and enables the hydrophilic component to be selectively more arranged on the surface than the inside, a method for producing the same, and a molded body containing the same.SOLUTION: A masterbatch resin composition contains a thermally meltable base resin and a hydrophilic component, where the masterbatch resin composition is blended with a high MFR (melt mass flow rate) resin having a higher MFR than that in ISO 1133 of the base resin. A method for producing the same includes: a primary processing step of melt-kneading a thermally meltable base resin and a hydrophilic component, cooling the resultant substance to be formed into chips; and a secondary processing step of melt-kneading a high MFR (melt mass flow rate) resin having a higher MFR than that in ISO 1133 of the base resin with the chipped resin composition, cooling the resultant substance to be formed into chips.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a masterbatch resin composition, a method for producing the same, and a molded body including the same.

Conventionally, various polymer blends and polymer compounds have been proposed. For example, Patent Document 1 discloses that a nonionic alkyl surfactant in which the nonionic part of the surfactant is ethylene oxide or / and propylene oxide is 0.2 to 1.0 wt% on the surface of the molded product and 0 in the molded product. Polypropylene moldings have been proposed for the purpose of imparting hydrophilicity, containing 0.5 to 10 wt% of polyethylene which is contained in an amount of 0.1 to 1.0 wt% and finely dispersed in the vicinity of the molding surface.
Patent Document 2 discloses that polypropylene (L-PP) having a melt mass flow rate of 0.1 g / 10 min to 15 g / 10 min based on ISO 1133 (230 ° C./2.16 kg) is at least 80 wt%, ISO 1133 (230 ° C./230° C. 2. Providing a mixture containing 2-20 wt% of polypropylene (HPP) having a melt mass flow rate of 200 g / 10 min to 2500 g / 10 min according to 2.16 kg), and bisbreaking (thermolysis) of the mixture Then, after visbreaking, a melt mass flow rate in the range of 10 g / 10 min to 60 g / 10 min according to ISO 1133 (230 ° C./2.16 kg) and a polydispersity index (PI of 4.0 or less after visbreaking) Polypropylene having Comprising the step of obtaining a composition (PP-C), method of manufacturing a filament breaking, i.e. the polypropylene composition to improve the spinnability is proposed.
Patent Document 3 proposes a polyolefin resin composition excellent in antifogging property, which contains a surfactant, oxidized polyethylene wax, and the like with respect to the polyolefin resin.
Patent Document 4 proposes a polyolefin resin composition having excellent antistatic properties, which contains a polyoxyalkylene ether, a polyhydric alcohol fatty acid ester, and the like with respect to the polyolefin resin.

JP 2009-144275 A Japanese Patent No. 5858860 JP 2005-146184 A JP 2002-146113 A

  However, conventional polymer blends and polymer compounds are intended to be mixed uniformly, and it has not been possible to selectively place hydrophilic components on the surface of the final molded product.

  In order to solve the above-described conventional problems, the present invention provides a masterbatch resin composition in which a hydrophilic component oozes out on the surface of the final molded body, and more hydrophilic components can be selectively disposed on the surface than inside. And a method for producing the same and a molded body including the same.

  The masterbatch resin composition of the present invention is a masterbatch resin composition containing a heat-meltable base resin and a hydrophilic component, and the masterbatch resin composition includes a melt mass flow rate in ISO 1133 of the base resin. High MFR resin higher than (MFR) is blended.

  A method for producing a masterbatch resin composition of the present invention is a method for producing the masterbatch resin composition described above, wherein a base resin that can be melted by heating and a hydrophilic component are melt-kneaded and cooled to form a chip. Including a processing step and a secondary processing step of melting and kneading a high MFR resin higher than the melt mass flow rate (MFR) of the base resin in ISO 1133 into the chip resin composition and cooling to form a chip. Features.

  The molded body of the present invention is a molded body containing the masterbatch resin composition and a thermoplastic resin, and the masterbatch resin composition is 1 to 10 masses per 100 parts by mass of the thermoplastic resin. It is characterized by including a part.

  The present invention includes a heat-meltable base resin and a hydrophilic component, and the masterbatch resin composition is blended with a high MFR resin higher than the melt mass flow rate (MFR) in ISO 1133 of the base resin. Thus, when a molded body resin is further added to the masterbatch resin composition to obtain a final molded body, hydrophilic components ooze out on the surface of the final molded body, and more hydrophilic components are selectively present on the surface than inside. The effect that it is arranged is produced. When the hydrophilic component is disposed more on the surface than the inside in the final molded body, the vicinity of the surface becomes wet and the surface can be modified even if the amount of the hydrophilic component added to the entire molded body is small.

FIG. 1 is a schematic explanatory view of an extruder used in one embodiment of the present invention.

The present invention includes a heat-meltable base resin and a hydrophilic component, and the masterbatch resin composition is blended with a high MFR resin higher than the melt mass flow rate (MFR) in ISO 1133 of the base resin. . By adopting the above configuration, when a molded body resin is further added to the master batch resin composition to obtain a final molded body, the hydrophilic component oozes out on the surface of the final molded body, and the hydrophilic component is selectively contained. There is an effect that it is arranged more on the surface than inside. The reason is related to the manufacturing method, but in the primary processing step, the hydrophilic component is melt-kneaded into the resin, but in the secondary processing step, it is more than the melt mass flow rate (MFR) in ISO 1133 of the base resin. When high high MFR resin (low melt viscosity and / or low molecular weight) is melt-kneaded, the hydrophilic component is pushed out by the high MFR resin having high affinity with the base resin and oozes out to the surface. It is estimated from. This phenomenon also occurs in the final molded body. When the hydrophilic component is disposed more on the surface of the molded body than the inside, even if the amount of the hydrophilic component added to the entire molded body is small, the vicinity of the surface becomes wet and the surface can be modified. The melt mass flow rate (MFR) is preferably measured at 230 ° C. and a 2.16 kg load when the heat-meltable base resin is, for example, polypropylene. The melt mass flow rate (MFR) of the high MFR resin is preferably 10 times or more higher than the melt mass flow rate (MFR) of the base resin, more preferably 20 times or more, and even more preferably 30 times or more. Here, the high MFR resin means that the melt viscosity is low and the fluidity is high. In a preferred example, the base resin may be MFR 20 g / 10 min polypropylene and the high MFR resin may be MFR 2000 g / 10 min polypropylene. In addition, as an example of MFR of resin other than a polypropylene, it can measure on condition of the following.
Polyethylene: 190 ° C., 2.16 kg load Polystyrene: 200 ° C., 5.00 kg load ABS (acrylonitrile-butadiene-styrene copolymer): 220 ° C., 10.00 kg load POM (polyoxymethylene): 190 ° C. 2.16 kg load ・ Polycarbonate: 300 ° C., 1.2 kg load ・ PET (polyethylene terephthalate): 280 ° C., 5.0 kg load ・ Polyamide (nylon): 235 ° C., 2.16 kg load Instead of melt mass flow rate (MFR), it may be specified by intrinsic viscosity (IV).

  The high MFR resin is preferably blended in an amount of 5 to 15 parts by mass, more preferably 7 to 13 parts by mass with respect to 100 parts by mass of the resin composition containing the base resin and the hydrophilic component. If it is the said range, even if there is little addition amount of the hydrophilic component with respect to the whole molded object, the surface vicinity will become wet and surface modification can be carried out.

  The base resin and the high MFR resin are preferably thermoplastic resins. Furthermore, the thermoplastic resin is preferably at least one selected from the group consisting of polyolefin, polyoxymethylene, polyamide, polycarbonate, polyvinyl chloride, ABS resin, AS resin, polyester, and thermoplastic elastomer. Among these, polyolefin is used as a general-purpose resin and is preferable because of a wide selection range of MFR. The molded body resin to be mixed with the masterbatch resin composition of the present invention is also selected from the above, and polyolefin is more preferable.

  The base resin and the high MFR resin are preferably the same type of resin. The resin of the same kind here means the above-mentioned polyolefin, polyoxymethylene, polyamide, polycarbonate, polyvinyl chloride, ABS resin, AS resin, polyalkylene terephthalate, and polylactic acid unit. More preferably, the base resin and the high MFR resin are resins of the same family. As used herein, the same family of resins refers to the same main polymer. For example, when polypropylene is used as the base resin, the high MFR resin corresponds to the same kind of resin as polyethylene, and the propylene-based (co) polymer containing more than 50% by mass of propylene corresponds to the resin of the same family. For example, when polyethylene is used as the base resin, the high MFR resin is equivalent to the same type of resin as the propylene-based (co) polymer, and the ethylene-based (co) polymer containing more than 50% by mass of ethylene is equivalent to the same-family resin. To do.

  The MFR in the high MFR resin is preferably 100 to 3000 g / 10 minutes. More preferably, it is 500-2500 g / 10min. If the MFR of the high MFR resin is outside the above range, it may be difficult to control the bleeding of the hydrophilic component, or it may be difficult to contain the hydrophilic component near the surface.

  The hydrophilic component is preferably provided as an aqueous solution or an aqueous dispersion. When provided in an aqueous solution (water-soluble hydrophilic component), ionic surfactants, nonionic surfactants and the like can be mentioned, among which nonionic surfactants are preferred. Examples of the ester type nonionic surfactant include glycerin fatty acid ester, sorbitan fatty acid ester, and sucrose fatty acid ester. Examples of the ether type nonionic surfactant include polyoxyethylene (POE) alkyl ether, polyoxyethylene ( POE) alkyl phenyl ether, polyoxyethylene polyoxypropylene glycol and the like. Among these, polyoxyethylene alkyl ethers or polyoxyalkylene derivatives (both compounds, for example, trade name “Emulgen” manufactured by Kao Corporation) are preferable.

  When the hydrophilic component is provided in an aqueous dispersion (water-dispersible hydrophilic component), clay minerals such as kaolinite, smectite, montmorillonite, bentonite, hydrophilic silica such as fumed silica, colloidal silica, silica gel, A multilayer structure such as talc and zeolite, or amorphous inorganic particles, natural polymer polysaccharides such as cellulose, amino polymer polysaccharides such as chitin and chitosan, and the like are used. The polymeric polysaccharide may be added as nanofibers. Since clay minerals and nanofibers are added in solid form, they also have an effect as a water retention agent. The average particle diameter of the inorganic particles is preferably as fine as possible, and is preferably 100 nm or less. In addition, an average particle diameter shall be measured with the phase-drap method particle diameter measuring apparatus.

  It is preferable that 1-10 mass parts of said hydrophilic components are mix | blended with respect to 100 mass parts of said masterbatch resin compositions. More preferably, the hydrophilic component is 2 to 8 parts by mass. If it is the said range, even if there is little addition amount of the hydrophilic component with respect to the whole molded object, the surface vicinity will become wet and surface modification can be carried out.

  The said hydrophilic component may be used individually by 1 type, and may be used in combination of 2 or more type. In particular, when the hydrophilic component is used in combination with a water-soluble hydrophilic component and a water-dispersible hydrophilic component, the water-dispersible (solid) hydrophilic component functions as a water retention agent and bleeds out the water-soluble hydrophilic component. This is preferable because it has the effect of slowing down or adjusting the speed. This is presumed that the water-soluble hydrophilic component remains in the solid component. The mixing ratio of the water-soluble hydrophilic component and the water-dispersible hydrophilic component is not particularly limited, but from the viewpoint of easily adjusting the bleed-out speed of the water-soluble hydrophilic component, 100 parts by mass of the water-soluble hydrophilic component The water-dispersible (solid) hydrophilic component is preferably blended in an amount of 0.1 to 10 parts by weight, more preferably 1 to 5 parts by weight.

  The water-soluble (liquid) hydrophilic component preferably has a molecular weight of 200 or more and 5000 or less, more preferably 300 or more and 3000 or less. When a hydrophilic surfactant is used alone as the water-soluble hydrophilic component, the molecular weight of the hydrophilic surfactant is preferably 1000 or less.

  The hydrophilic component is preferably used in combination of two or more water-soluble hydrophilic components having different molecular weights. By using two or more water-soluble hydrophilic components having different molecular weights in combination, the speed of bleeding out of the hydrophilic component to the surface of the molded product can be adjusted. Specifically, the low molecular weight hydrophilic component bleeds out quickly, and the high molecular weight hydrophilic component bleeds out slowly, so that the function of the hydrophilic component can be exhibited for a long time. Among the two or more water-soluble hydrophilic components, the component (A) having the smallest molecular weight preferably has a molecular weight of 200 or more and 800 or less, more preferably 300 or more and 700 or less. In the two or more types of water-soluble hydrophilic components, the component (B) having the largest molecular weight preferably has a molecular weight of 1500 or more and 5000 or less, and more preferably 2000 or more and 3000 or less. The wider the difference in molecular weight (B−A) between the component (A) having the smallest molecular weight and the component (B) having the largest molecular weight, the higher the persistence of wetting near the surface. The molecular weight difference (B−A) is preferably 500 or more and 3000 or less, more preferably 1000 or more and 2500 or less. When using two or more types of water-soluble hydrophilic components (surfactants), the amount of each added is preferably 0.5 to 5 parts by mass, more preferably 100 parts by mass of the masterbatch resin composition. Is 1 to 3 parts by mass. The mixing ratio of the low molecular weight hydrophilic component (A) and the high molecular weight hydrophilic component (B) is preferably A: B = 2: 8 to 8: 2, more preferably 4: 6 to 6: 4. .

  The masterbatch resin composition preferably further contains a compatibilizing agent. The compatibilizer is preferably blended in an amount of 1 to 8 parts by mass with respect to 100 parts by mass of the masterbatch resin composition. The compatibilizing agent is preferably the same type of resin as the base resin and / or the high MFR resin. The dispersibility with a hydrophilic component improves more if it is the same kind of resin. The compatibilizing agent is preferably a thermoplastic resin containing a hydrophilic group. When the same kind of resin containing a hydrophilic group is used, the affinity with the base resin and / or the high MFR resin and the hydrophilic component is high, and the resin can be dispersed more uniformly.

  The specific compatibilizer is preferably an ethylene copolymer containing a polar group (an acid anhydride group) such as an ethylene-acrylic acid ester copolymer or an ethylene-acrylic acid-maleic acid copolymer. Since the ethylene-based copolymer containing a polar group has a polar group, the affinity with the hydrophilic component is increased, and the melting point is relatively lower than that of the base resin and / or the high MFR resin, so that it is easy to knead. Therefore, it is preferable. The melting point (DSC method) of the compatibilizer is preferably 70 to 110 ° C. A more preferable melting point is 80 to 105 ° C. In particular, an ethylene-based copolymer containing an acid anhydride group as a polar group such as an ethylene-acrylic acid-maleic acid copolymer has a higher affinity with a hydrophilic component, and is preferable.

  The method for producing a masterbatch resin composition of the present invention includes a base resin that can be heated and melted, a primary processing step in which a hydrophilic component is melt-kneaded and cooled to form a chip; By including a secondary processing step of melt-kneading a high MFR resin higher than the melt mass flow rate (MFR) in the base resin ISO 1133, cooling and chipping, a hydrophilic component oozes out on the surface of the final molded body, The hydrophilic component is selectively arranged on the surface more than the inside. The “chip” may be referred to as “pellet”.

  In the primary processing step, first, an extruder is used, and an extrusion unit is continuously connected to a kneading chamber equipped with a decompression line. In the kneading chamber, a hydrophilic component (liquid) or, if necessary, a solvent is used. The dissolved or dispersed hydrophilic component and the heated and melted resin are supplied, and simultaneously with mixing, the solvent is removed in a gaseous state from the reduced pressure line, and then the resin composition is extruded from the extruded portion, thereby the resin. A composition is obtained. Furthermore, it is preferable to add a compatibilizing agent because the mixing of the base resin and the hydrophilic component becomes efficient. Moreover, in the said secondary processing process, it is preferable to add a water retention agent as a solid hydrophilic component among hydrophilic components depending on the case. As the water retention agent, montmorillonite (clay mineral) such as bentonite, hydrophilic silica, zeolite and the like are preferable. In the case of bentonite, it is preferable to use 0.05 to 0.2 parts by mass of the 2% by mass dispersion with respect to 100 parts by mass of the master batch resin composition. Water retention agents such as bentonite have the effect of slowing the bleeding out of the hydrophilic component, which is thought to be because the hydrophilic component remains in the bentonite layer. In the secondary processing step, water retention agents such as colloidal silica, SAP (diluted water), CNF (cellulose nanofiber), and pentaerythrityl (water retention agent for cosmetics) in tripolyhydroxystearic acid are used for the purpose of stabilizing water absorption. An appropriate amount may be mixed.

  The molded object of this invention contains 1-10 mass parts of said masterbatch resin compositions with respect to 100 mass parts of thermoplastic resins (resin for molded objects). Thereby, a hydrophilic component oozes out to the surface of a molded object, and a hydrophilic component is selectively arrange | positioned more on the surface from the inside, and functions, such as hydrophilic property and antistatic property, can also be provided to a molded object. In the said molded object, it is preferable that 0.1-10 mass parts of said masterbatch resin compositions are included with respect to 100 mass parts of thermoplastic resins from a viewpoint which is easy to exhibit the function by a hydrophilic component, 1-3. It is more preferable to include a part by mass.

  In the molded body, the thermoplastic resin may be the same resin as the base resin in the masterbatch resin composition. Specifically, at least one selected from the group consisting of polyolefin, polyoxymethylene, polyamide, polycarbonate, polyvinyl chloride, ABS resin, AS resin, polyester, and thermoplastic elastomer is preferable. Among these, polyolefin is more preferable from the viewpoint of versatility.

  The said molded object can be obtained by shape | molding and processing the resin composition containing the masterbatch resin composition of this invention. The molded body may be molded by compression molding, vacuum molding, injection molding, transfer molding, extrusion molding, calendar molding, or a combination of these molding methods using the extruder. The molded body may be formed into other appropriate shapes such as fibers, filaments, films, sheets, foams, block bodies, round bars, box shapes, flat plates, and the like.

  The molded body is preferably a fiber. Functions such as hydrophilicity and antistatic properties can be imparted to the resulting fiber. The fineness of the fiber is preferably 0.1 to 100 dtex. For example, it is preferably 5 to 50 dtex for industrial materials, and 0.5 to 5 dtex for clothing.

  When the total mass of the fiber is 100% by mass, the fiber preferably contains 0.025 to 0.25% by mass of a hydrophilic component as clothing fiber. In particular, if the fiber is made by adding a hydrophilic component to a polypropylene resin having strong hydrophobicity, the processability when making it into a thread or fabric is good, and the original functions such as the lightness of polypropylene are not significantly impaired. ,preferable.

As an example of the compound ratio, in the case of polypropylene resin, it is as follows.
(1) Base resin: hydrophilic component (polyoxyethylene alkyl ether): compatibilizing agent = 100: 2-8: 2-8 (parts by mass) primary processing (primary processing resin).
(2) As a secondary processing, a primary processing resin: high MFR resin (MFR = 2000: “El Modu” (manufactured by Idemitsu Kosan Co., Ltd.)) = 100: 5 to 15 (parts by mass) is processed into a master batch resin composition. (Secondary processing resin).
(3) The masterbatch resin composition (secondary processing resin) is usually mixed with about 1 to 10 parts by mass and 100 parts by mass of a thermoplastic resin (molded resin) to obtain fibers, films, molded products, etc. Process into the final product (molded body).

  Hereinafter, it demonstrates using drawing. FIG. 1 is a schematic explanatory view of an extruder used in one embodiment of the present invention. The extruder 1 includes a raw material supply port 2, a resin melting part 3, a kneading and dispersing part 4, a decompression line 5, an extrusion part 6, and a removal part 7. First, a polymer (a heat-meltable base resin) and a hydrophilic component (liquid) or a hydrophilic component dissolved in water as necessary are supplied from the raw material supply port 2 of the resin melting portion 3. You may mix both before supply. Next, the mixture is fed to the kneading / dispersing unit 4, and a plurality of kneading plates are rotating in the kneading / dispersing unit 4. Here, the hydrophilic components dissolved in the polymer and water are uniformly mixed. Next, moisture is removed from the decompression line 5 in the state of water vapor. Next, the resin composition is extruded from the extruding part 6, cooled and taken out from the taking out part 7, and if it is cut after cooling, it becomes a pellet-shaped resin composition. The pellet has a cylindrical shape with a diameter of 2 mm and a height of 2 mm, for example. This step is a primary processing step.

  Next, using the extruder, the resin composition obtained in the first step is melt-kneaded with a high MFR resin higher than the melt mass flow rate (MFR) in ISO 1133 of the base resin, and cooled to form a chip. To do. This is the secondary processing step.

  The amount of resin chips added to the master batch resin composition chips obtained in the secondary processing step is preferably about 10 to 100 times. More preferably, in the case of polyolefin, polyoxymethylene, polyamide, polycarbonate, polyvinyl chloride, ABS resin, AS resin, etc., the master batch resin composition chip amount is preferably 1 to 6% by mass, and the master batch in the case of polyester The amount of the resin composition chip is preferably 1 to 4% by mass. According to the masterbatch resin composition of the present invention, desired hydrophilic performance can be obtained even if the amount of the hydrophilic component added to the resin is small.

  Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to the following examples. In addition, when the addition amount is simply expressed as% in the following examples, it means mass%.

(Measuring method)
(1) Melt mass flow rate (MFR)
According to ISO1133, it measured by 230 degreeC and a 2.16kg load.
(2) Hydrophilic (water absorption)
In accordance with the water absorption test method (knitting basket method) in the purity test method of Japanese Pharmacopoeia absorbent cotton, the sedimentation rate and water absorption were measured.
[Settling speed]
Take 5 g of raw cotton sample and use a cylindrical test basket with a depth of 80 mm and a diameter of 50 mmφ processed with enameled wire. When the test basket is dropped into the water tank, measure the time (seconds) that the raw cotton sample sinks below the surface of the water. did.
[Water absorption]
The cage after the sedimentation rate was measured was gently taken out, water was dropped on the No. 10 sieve wire mesh for 1 minute, placed in a beaker, and its mass was measured.
(3) Surface resistivity Based on the measurement of resistivity according to JIS K 6911 5.13, using a surface resistance meter WA-400 manufactured by Taiyo Denki Sangyo Co., Ltd. under the conditions of 20 ° C. and 40% RH (relative humidity). It was measured.
(4) Electrostatic voltage half-life In accordance with JIS L 1094, measurement was performed under the conditions of 20 ° C. and 40% RH (relative humidity) using STATIC HONESTMETER H-0110-S4 manufactured by Sisid Electrostatics. Specifically, the sample was attached to a rotating body, an initial voltage of 10 kV was applied during rotation, and the time until the voltage was halved was measured.

Example 1 Production of Masterbatch Resin Composition A masterbatch resin composition was produced in the following order.
[Primary processing resin]
(1) As a water-soluble hydrophilic component, polyoxyalkylene ether (manufactured by Kao Corporation, Emulgen 1108, active ingredient 100 mass%, molecular weight 473) was prepared.
(2) Polypropylene (MFR 20 g / 10 min) pellets (2 mm in diameter and 2 mm in height) were prepared as the base resin.
(3) 90 parts by mass of base resin pellets, 5 parts by mass of hydrophilic component, and compatibilizer (ethylene-acrylic acid-maleic acid copolymer (MFR 80 g / 10 min) from the raw material supply port 2 of the extruder shown in FIG. (190 ° C., 2.16 kg), melting point (DSC method) 98 ° C.) 5 parts by mass were supplied.
(4) The processing temperature in the extruder was set to 170 to 190 ° C. In the resin melting section 3, the feed is fed forward along the rotation axis, and in the kneading and dispersing section 4, a plurality of kneading plates are rotated, where the base resin and the hydrophilic component are uniformly mixed, and then the decompression line 5 The water was removed at the same time by applying a vacuum (negative pressure).
(5) Next, the resin composition was extruded from the extrusion portion 6, cooled, and taken out from the takeout port 7.
(6) It led to the pelletizer and pelletized (primary processing resin). (Primary processing process)
[Secondary processing resin]
(1) High MFR resin higher than melt mass flow rate (MFR) in ISO 1133 of the base resin in 100 parts by mass of the pelletized resin composition (primary processing resin) obtained in the primary process using the extruder 10 parts by mass of low stereoregular polypropylene (trade name “El Modu” S400, manufactured by Idemitsu Kosan Co., Ltd.) as MFR 2000 g / 10 min, bentonite (average particle size 30-50 μm) as a solid hydrophilic component (water retention agent) 0.125 parts by mass were mixed and supplied from the raw material supply port 2.
(2) Melt-kneaded, cooled, and pelletized with a pelletizer to obtain a cylindrical polypropylene-based masterbatch resin composition (secondary processing resin) having a diameter of 2 mm and a height of 2 mm.

(Example 2) Manufacture of masterbatch resin composition In the production of the primary processing resin, 90 parts by mass of base resin pellets from the raw material supply port 2 of the extruder shown in FIG. 2.6 parts by mass of emulgen 1108, molecular weight 473), 2.4 parts by mass of polyoxyalkylene ether (manufactured by Kao Corporation, emulgen 1150S-60, active ingredient 60% by mass, molecular weight 2374, aqueous solution) Except for supplying 5 parts by mass of a solubilizer (ethylene-acrylic acid-maleic acid copolymer (MFR 80 g / 10 min (190 ° C., 2.16 kg), melting point (DSC method) 98 ° C.)), the same as in Example 1 Thus, a master batch resin composition was prepared.

Example 3 Production of Masterbatch Resin Composition In the production of the primary processed resin, 80 parts by mass of base resin pellets and 4% by mass of polyoxyalkylene ether from the raw material supply port 2 of the extruder shown in FIG. 12.5 parts by mass of MFR 800 g / 10 min), 2.5 parts by weight of polyoxyalkylene ether (manufactured by Kao Corporation, Emulgen 1108, molecular weight 473), and compatibilizer (ethylene-acrylic acid-maleic acid copolymer) A master batch resin composition was prepared in the same manner as in Example 1 except that 5 parts by mass (MFR 8.5 g / 10 min (190 ° C., 2.16 kg), melting point (DSC method) 99 ° C.) was supplied.

(Example 4) Manufacture of fiber The fiber using the masterbatch resin composition of Example 1 was manufactured in the following order.
(1) 1.5 parts by mass of the masterbatch resin composition of Example 1 and 100 parts by mass of the same polypropylene (PP) as the base resin as a molded body resin were prepared.
(2) The mixed pellets of (1) were supplied from a raw material supply port of an extruder for melt spinning, melt-kneaded with an extruder using a conventional melt spinning machine, and then melt-spun. Thereafter, the fiber was drawn and cut using a known drawing machine to produce a polypropylene fiber having a fineness of 6.6 dtex and a fiber length of 64 mm.

(Example 5) Fabrication of fiber The fineness was 6.6 dtex and the fiber was the same as Example 4 except that the masterbatch resin composition of Example 2 was used instead of the masterbatch resin composition of Example 1. A polypropylene fiber having a length of 64 mm was produced.

(Example 6) Fabrication of fiber The fineness was 6.6 dtex and the fiber was the same as Example 4 except that the masterbatch resin composition of Example 3 was used instead of the masterbatch resin composition of Example 1. A polypropylene fiber having a length of 64 mm was produced.

Example 7 Production of Fiber (1) 2 parts by mass of the masterbatch resin composition of Example 1 and 100 parts by mass of the same polypropylene (PP) as the base resin were prepared as a molded body resin.
(2) The mixed pellets of (1) were supplied from a raw material supply port of an extruder for melt spinning, melt-kneaded with an extruder using a conventional melt spinning machine, and then melt-spun. Then, it was drawn and cut using a known drawing machine to produce a polypropylene fiber for clothing having a fineness of about 1.7 dtex and a fiber length of 38 mm. The obtained polypropylene fiber for clothing also had good processability when used as a yarn or fabric.

(Example 8) Production of fiber The fineness was about 1.7 dtex in the same manner as in Example 7 except that the masterbatch resin composition of Example 2 was used instead of the masterbatch resin composition of Example 1. A polypropylene fiber for clothing having a fiber length of 38 mm was produced. The obtained polypropylene fiber for clothing also had good processability when used as a yarn or fabric.

(Example 9) Preparation of T-die film (1) 5 parts by mass of the masterbatch resin composition of Example 2 and 100 parts by mass of polypropylene (PP), which is the same as the base resin, were prepared as a molded body resin.
(2) Using a known T-die film manufacturing apparatus, the mixed pellets of (1) were extruded at a melting temperature of 200 ° C. to produce a T-die film having a thickness of 50 μm.

Example 10 Production of Injection Molded Body (1) 10 parts by mass of the masterbatch resin composition of Example 2 and 100 parts by mass of the same polypropylene (PP) as the base resin as a molded body resin were prepared.
(2) Using a known injection molding production apparatus, the mixed pellets of (1) were injection molded at a melting temperature of 200 ° C. to obtain a molded plate having a thickness of 3 mm.

Example 11 Production of Injection Molded Body (1) 2 parts by mass of the masterbatch resin composition of Example 2 and 100 parts by mass of the same polypropylene (PP) as the base resin as a molded body resin were prepared.
(2) Using a known injection molding production apparatus, the mixed pellets of (1) were injection molded at a melting temperature of 200 ° C. to obtain a molded plate having a thickness of 3 mm.

(Comparative Example 1)
For comparison, a commercially available polyethylene terephthalate fiber (fineness: 8.9 dtex, fiber length: 64 mm) was prepared.

  The hydrophilicity (water absorption) of the fibers of Examples 4 to 6 and Comparative Example 1 was measured as described above, and the results are shown in Table 1 below. The surface resistivity and charged voltage half-life of the T-die film of Example 9 and the injection molded articles of Examples 10 to 11 were measured as described above, and the results are shown in Table 2 below.

As can be seen from Table 1, the molded body using the masterbatch resin composition of the example had a slightly inferior sedimentation speed because the fiber treatment agent was adhered in Comparative Example 1 (blank). The settling rate criterion (within 8 seconds) was sufficiently satisfied, and high absorbability could be imparted to polypropylene having no water absorption. As can be seen from Table 2, the molded body using the masterbatch resin composition of the example has a surface resistivity in the range of 10 ⁶ to 10 ^11, a charged half-life of about 1 second, and is hydrophilic. Antistatic properties were imparted by the components.

  The masterbatch resin composition of the present invention can be applied to various molding methods such as injection molding, extrusion molding, and press molding. Moreover, a molded object is applicable to various molded objects, such as a fiber, a film, a sheet | seat, a round bar, a box shape, and a flat plate.

DESCRIPTION OF SYMBOLS 1 Extruder 2 Raw material supply port 3 Resin melting part 4 Kneading dispersion part 5 Decompression line 6 Extrusion part 7 Extraction part

Claims (13)

A masterbatch resin composition comprising a heat-meltable base resin and a hydrophilic component,
The masterbatch resin composition is characterized in that a high MFR resin higher than the melt mass flow rate (MFR) in ISO 1133 of the base resin is blended in the masterbatch resin composition.   The masterbatch resin composition according to claim 1, wherein a melt mass flow rate (MFR) of the high MFR resin is 10 times or more higher than a melt mass flow rate (MFR) of the base resin.   The masterbatch resin composition according to claim 1 or 2, wherein 5 to 15 parts by mass of the high MFR resin is blended with respect to 100 parts by mass of the resin composition containing the base resin and a hydrophilic component.   The base resin and the high MFR resin are thermoplastic resins, and the thermoplastic resin is selected from the group consisting of polyolefin, polyoxymethylene, polyamide, polycarbonate, polyvinyl chloride, ABS resin, AS resin, polyester, and thermoplastic elastomer. The masterbatch resin composition according to claim 3, which is at least one of the above.   The masterbatch resin composition according to any one of claims 1 to 4, wherein the hydrophilic component includes a nonionic surfactant.   The said hydrophilic component is a masterbatch resin composition of any one of Claims 1-5 containing a water retention agent.   The masterbatch resin composition according to any one of claims 1 to 6, wherein 1 to 10 parts by mass of the hydrophilic component is blended with respect to 100 parts by mass of the masterbatch resin composition. It is a manufacturing method of the masterbatch resin composition in any one of Claims 1-7,
A heat-meltable base resin, a primary processing step in which a hydrophilic component is melt-kneaded and cooled to form chips;
A master comprising a secondary processing step of melting and kneading a high MFR resin higher than the melt mass flow rate (MFR) of the base resin in ISO 1133 into the chip resin composition and cooling to form a chip. A method for producing a batch resin composition.   The manufacturing method of the masterbatch resin composition of Claim 8 which mix | blends a nonionic surfactant as a hydrophilic component in the said primary processing process, and adds a water retention agent further as a hydrophilic component in the said secondary processing process. The primary processing step is to continuously connect a resin melting part, a kneading dispersion part equipped with a decompression line, and an extrusion part,
A hydrophilic component dissolved or dispersed in a solvent, if necessary, and a base resin heated and melted are supplied to the kneading dispersion part, and the solvent is removed in a gaseous state from the vacuum line simultaneously with mixing, The manufacturing method of the resin composition of Claim 8 or 9 including the process of extruding a resin composition from an extrusion part.   It is a molded object containing the masterbatch resin composition in any one of Claims 1-7, and a thermoplastic resin, Comprising: The said masterbatch resin composition is 1-10 with respect to 100 mass parts of said thermoplastic resins. A molded body comprising a mass part.   12. The molding according to claim 11, wherein the molded body is a fiber for clothing, and when the total mass of the fiber for clothing is 100% by mass, the hydrophilic component is contained in an amount of 0.025 to 0.25% by mass. body.   The molded article according to claim 12, wherein the clothing fiber is a polypropylene fiber.

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