JP2015144991A - Oil absorption member, and dyeable polyolefin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil absorption member having high oil absorption ability, and a fiber product and an oil absorption method using the same, and provide a dyeable polyolefin composition and a dyeable molded article having excellent dyeability without mixing a different polymer such as polyester, and a dyeing method thereof.SOLUTION: This invention provides an oil absorption member comprising an olefin polymer A in which melting endotherm ΔH-D measured with a differential scanning calorimeter (DSC) is 0-80 J/g, and a fiber product and an oil absorption method using the same. This invention also provides a dyeable polyolefin composition comprising an olefin polymer A in which melting endotherm ΔH-D measured with a differential scanning calorimeter (DSC) is 0-80 J/g.

Description

  The present invention relates to an oil adsorption member, a textile product using the same, and an oil adsorption method. The present invention also relates to a dyeable polyolefin composition, a dyeable molded article, and a dyeing method thereof.

Conventionally, a polypropylene non-woven fabric has been used as an absorbent for recovering heavy oil that has flowed out to the sea due to tanker grounding, an organic solvent contained in factory effluent, and the like (see, for example, Patent Document 1). This is because polypropylene itself has an affinity for heavy oil and is lightweight and floats in seawater, so that it is possible to efficiently absorb and remove heavy oil and filth on the seawater surface.
Furthermore, since a nonwoven fabric is comprised with a fiber with a large surface area, it is also characterized by the high absorption performance per mass.
However, there is a demand for an oil adsorbing member with higher oil absorption performance than these conventional ones.

  Polyolefins, especially polypropylene, are light and have a specific gravity of 0.9, which makes them easy to mold and have high durability against chemicals such as acids and alkalis. It is widely used for food packaging films, food containers, toys, sundries, textiles for industrial materials, etc.

  However, polyolefin has low dyeability and is difficult to dye after molding. This has the problem that the design is lowered when polypropylene is used as the fiber for clothing. According to the method in which the pigment is kneaded into polypropylene and then spun, colored polypropylene fibers can be produced. However, it is difficult to produce a subtle hue with this method. Also, with this method, it is difficult to produce a fiber with a fine single yarn fineness, and there are many problems in quality such as the occurrence of many slabs.

  In recent years, various studies have been made to dye polypropylene fibers for clothing applications (see, for example, Patent Documents 2 to 5). Patent Documents 2 and 3 disclose fibers in which polyester is blended with polypropylene using the dyeability of polyester. Patent Documents 4 and 5 disclose a fiber containing a block copolymer of polyolefin and methacrylic acid ester or a fiber in which an ethylene vinyl acetate copolymer is mixed with polypropylene for the purpose of improving dyeability. .

JP 2004-230249 A JP-A-6-25912 JP 2012-41664 A JP 2001-262433 A JP 2000-8223 A

An object of the present invention is to provide an oil adsorbing member having higher oil absorbing performance, a fiber product using the same, and an oil adsorbing method.
Moreover, in the fiber which mixed polyester etc. in the polypropylene of patent documents 2-5, since the ability dye | stained by polyester and polypropylene differs, there exists a problem that a hue differs and dyeing | staining unevenness arises. Moreover, since it becomes a blend of a polypropylene and an incompatible component, there exists a problem that intensity | strength falls when it is set as a fiber or a molded object.
Therefore, the problem to be solved by the present invention is to provide a dyeable polyolefin composition and dyeable molded article excellent in dyeability without mixing different polymers such as polyester, and a dyeing method thereof. It is in.

According to the present invention, the following inventions are provided.
[1] An oil adsorbing member containing an olefin polymer A having a melting endotherm ΔH-D of 0 to 80 J / g measured by a differential scanning calorimeter (DSC).
[2] 30 to 99% by mass of the olefin polymer A and 1 to 70% by mass of the olefin polymer B having a melting endotherm ΔHD measured by a differential scanning calorimeter (DSC) of more than 80 J / g The oil adsorbing member according to [1].
[3] The oil adsorbing member according to [2], wherein the olefin polymer B is a propylene polymer.
[4] The oil adsorbing member according to any one of [1] to [3], wherein the olefin polymer A is a propylene polymer.
[5] The oil adsorbing member according to any one of [1] to [4], which is in a sheet form.
[6] The oil adsorbing member according to any one of [1] to [4], which is a nonwoven fabric.
[7] The oil adsorbing member according to [6], wherein the fiber constituting the nonwoven fabric is a core-sheath type composite fiber, and the sheath component contains the olefin polymer A.
[8] A multilayer nonwoven fabric-like oil adsorbing member comprising at least two layers of non-woven fabrics, and any one or more of the layers is the oil adsorbing member according to [6] or [7].
[9] A fiber product including at least one of the oil adsorbing member according to any one of [1] to [7] and the multilayer nonwoven fabric-like oil adsorbing member according to [8].
[10] An oil adsorption method comprising a step of bringing oil into contact with at least one of the oil adsorption member according to any one of [1] to [7] and the multilayer nonwoven fabric oil adsorption member according to [8].
[11] The oil adsorption method according to [10], wherein the oil includes mineral oil.

In addition, as a result of intensive studies, the present inventors have found that a polyolefin having an amorphous region is excellent in dyeability. Furthermore, such polyolefins have good compatibility with polypropylene, and blending such polyolefins with polypropylene can increase the amorphous regions in the polypropylene without compromising the properties of the polypropylene, It has been found that the dyeability of polypropylene can be improved. The second invention of the present invention has been completed based on these findings. According to the second invention of the present invention, the following invention is provided.
[12] A dyeable polyolefin composition containing an olefin polymer A having a melting endotherm ΔH-D of 0 to 80 J / g measured by a differential scanning calorimeter (DSC).
[13] 10 to 99% by mass of the olefin polymer A and 90 to 1% by mass of an olefin polymer B having a melting endotherm ΔHD of 80 J / g measured by a differential scanning calorimeter (DSC) The dyeable polyolefin composition according to [12] above.
[14] 30 to 90% by mass of the olefin polymer A and 70 to 10% by mass of the olefin polymer B having a melting endotherm ΔHD measured by a differential scanning calorimeter (DSC) exceeding 80 J / g The dyeable polyolefin composition according to the above [12] or [13].
[15] The dyeable polyolefin composition according to the above [13] or [14], wherein the olefin polymer B is a propylene polymer.
[16] The dyeable polyolefin composition according to any one of [12] to [15], wherein the olefin polymer A is a propylene polymer.
[17] A dyeable molded article obtained by molding the dyeable polyolefin composition according to any one of [12] to [16].
[18] The dyeable molded article according to the above [17], which is a film, sheet, or fiber.
[19] The dyeable molded article according to the above [17] or [18], which is a nonwoven fabric.
[20] A solution in which the dyeable polyolefin composition according to any one of [12] to [16] or the dyeable molded article according to any one of [17] to [19] is dissolved. The dyeing method which has the process made to immerse or contact.
[21] A dyed product dyed by the dyeing method described in [20] above.

The oil adsorbing member, the fiber product and the oil adsorbing method using the oil adsorbing member according to the first invention of the present invention have high oil absorption performance.
In addition, the dyeable polyolefin composition and the dyeable molded article according to the second invention of the present invention are excellent in dyeability, and do not mix different polymers such as polyester with the polyolefin. Strength reduction and the like can be suppressed.

FIG. 1 is a photograph of the appearance of a test piece after dyeing in Examples 19 and 20 and Comparative Example 3.

The oil adsorbing member according to the first aspect of the present invention includes an olefin polymer A having a melting endotherm ΔH-D of 0 to 80 J / g measured by a differential scanning calorimeter (DSC). Along with the polymer A, the olefin polymer B having a melting endotherm ΔH-D measured by a differential scanning calorimeter (DSC) of more than 80 J / g may also be included.
The oil adsorbing member according to the first aspect of the present invention preferably contains 30 to 99% by mass of olefin polymer A and 1 to 70% by mass of olefin polymer B. What contains 40-95 mass% and the olefin polymer B 5-60 mass% is preferable, The thing containing 50-90 mass% of olefin polymer A, and 10-50 mass% of olefin polymer B is preferable.

[Olefin polymer A]
Specific examples of the olefin polymer A include propylene homopolymers, ethylene-propylene copolymers, ethylene-α-olefin copolymers, polyα-olefins, etc., but from the viewpoint of oil absorption performance, propylene units. Is preferably a propylene polymer having a copolymerization ratio of 50 mol% or more, more preferably a propylene homopolymer.

As described above, the olefin polymer A has a melting endotherm ΔH-D of 0 to 80 J / g measured by a differential scanning calorimeter (DSC), and a melting endotherm ΔH-D of 5 to 75 J / g. g is preferable, 10 to 70 J / g is more preferable, and 30 to 50 J / g is particularly preferable. If the melting endotherm ΔH-D is more than 80 J / g, the oil absorption performance is poor.
The melting endotherm ΔH-D is determined by DSC measurement. That is, using a differential scanning calorimeter (DSC-7, manufactured by Perkin Elmer Co., Ltd.), 10 mg of the sample was held at −10 ° C. for 5 minutes in a nitrogen atmosphere and then heated at 10 ° C./min. Let the melting endotherm be ΔH−D.
The melting endotherm ΔH-D can be controlled by the structure of the main catalyst and the polymerization conditions when the olefin polymer A is a propylene homopolymer. Moreover, when the olefin polymer A is an ethylene-propylene copolymer, it can be controlled by changing the copolymerization ratio of the ethylene unit and the propylene unit.
For example, when controlling by the structure of a catalyst, it is necessary to design the space where a monomer coordinates to the central metal of a catalyst to an appropriate size. Depending on the size of the coordination space, the insertion of the monomer is difficult to occur, and the activity is reduced. If the structure is a racemic structure, a highly ordered polymer is obtained, and the endothermic amount of melting increases. With a meso-type structure, a polymer with low regularity is likely to be obtained, and the melting endotherm may be low. More specifically, by using a double-crosslinking catalyst described later, it is possible to synthesize a polymer having a melting endotherm ΔH-D of 0 to 80 J / g by controlling the coordination space of the monomer. .
In the present specification, the melting endotherm ΔH-D is 0 J / g means that the crystal melting peak cannot be substantially observed because the crystallization rate is extremely slow in the DSC measurement.

  The olefin polymer A has a molecular weight distribution (Mw / Mn) measured by GPC method of preferably 4.0 or less, more preferably 3.5 or less, still more preferably 3.0 or less, particularly preferably 2.5 or less. It is.

  The olefin polymer A preferably has a weight average molecular weight (Mw) measured by GPC method of 3,000 to 1,000,000, more preferably 10,000 to 200,000, and still more preferably 20,000. ~ 160,000. When the weight average molecular weight (Mw) is 1,000,000 or less, the oil absorption performance becomes better, and when it is 3,000 or more, dissolution in oil can be suppressed.

In addition, the said weight average molecular weight (Mw) and number average molecular weight (Mn) are things of polystyrene conversion measured with the following apparatus and conditions, The said molecular weight distribution (Mw / Mn) is these weight average molecular weights (Mw). ) And the number average molecular weight (Mn).
<GPC measurement device>
Column: TOSO GMHHR-H (S) HT
Detector: RI detector for liquid chromatogram WATERS 150C
<Measurement conditions>
Solvent: 1,2,4-trichlorobenzene Measurement temperature: 145 ° C
Flow rate: 1.0 ml / min Sample concentration: 2.2 mg / ml Injection volume: 160 microliter Calibration curve: Universal Calibration
Analysis program: HT-GPC (Ver.1.0)

  The olefin polymer A may be a propylene polymer having a copolymerization ratio of propylene units of 50 mol% or more as described above. In this case, the copolymerization ratio of propylene units is 60 mol% or more. More preferably, it is more preferably 70 mol% or more, particularly preferably 90 mol% or more, and most preferably 95 mol% or more. Examples of the copolymerizable monomer include ethylene, α-olefins having 4 to 30 carbon atoms such as 1-butene, 1-pentene, 1-hexene, 1-octene and 1-decene, (meth) acrylic acid, (Meth) acrylic acid esters such as methyl (meth) acrylate, vinyl acetate and the like can be mentioned, but it is preferable to use one or more selected from ethylene and an α-olefin having 4 to 30 carbon atoms.

As a method for producing the olefin polymer A, propylene is produced using a metallocene catalyst obtained by combining (a) a transition metal compound forming a crosslinked structure via two crosslinking groups and (b) a cocatalyst. A polymerization method is preferred.
Specifically, a transition metal compound (a) represented by the following general formula (I) and a compound capable of forming an ionic complex by reacting with the transition metal compound of the component (a) or a derivative thereof ( Examples thereof include a method of polymerizing propylene in the presence of a polymerization catalyst containing a promoter component (b) selected from b-1) and aluminoxane (b-2).

In the above general formula (I), M represents a metal element of Groups 3 to 10 of the periodic table or a lanthanoid series, and E ¹ and E ² represent a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a heterocyclo group, respectively. A ligand selected from a pentadienyl group, a substituted heterocyclopentadienyl group, an amide group, a phosphide group, a hydrocarbon group, and a silicon-containing group, and having a crosslinked structure via A ¹ and A ² And they may be the same or different. X represents a σ-bonding ligand, and when there are a plurality of X, the plurality of X may be the same or different and may be cross-linked with other X, E ¹ , E ² or Y. Y represents a Lewis base, and when there are a plurality of Y, the plurality of Y may be the same or different, may be cross-linked with other Y, E ¹ , E ² or X, and A ¹ and A ² are A divalent bridging group that binds two ligands, a hydrocarbon group having 1 to 20 carbon atoms, a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a germanium-containing group, a tin-containing group , -O -, - CO -, - S -, - SO 2 -, - Se -, - NR1 -, - PR 1 -, - P (O) R 1 -, - BR 1 - or -AlR ¹ - a R ¹ represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms or a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, which may be the same or different. q represents an integer of 1 to 5 and represents [(M valence) -2], and r represents an integer of 0 to 3.

Specific examples of the transition metal compound represented by the general formula (I) include (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (3-n-butylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (3-trimethylsilylmethylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis ( 3-phenylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (4,5-benzoindenyl) zirconium dichloride, (1,2′-dimethylsilylene) ( 2,1′-dimethylsilylene) bis (4-isopropylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) 2,1'-dimethylsilylene) bis (5,6-dimethylindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-dimethylsilylene) bis (4,7-di-isopropylindenyl) ) Zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-dimethylsilylene) bis (4-phenylindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-dimethylsilylene) ) Bis (3-methyl-4-isopropylindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-dimethylsilylene) bis (5,6-benzoindenyl) zirconium dichloride, (1, 2'-dimethylsilylene) (2,1'-isopropylidene) -bis (indenyl) zirconium dichloride, (1 2'-dimethylsilylene) (2,1'-isopropylidene) -bis (3-methylindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-isopropylidene) -bis (3- Isopropylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-isopropylidene) -bis (3-n-butylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2 , 1′-isopropylidene) -bis (3-trimethylsilylmethylindenyl) zirconium dichloride, and the like, and those obtained by substituting zirconium in these compounds with titanium or hafnium.

  Next, as the component (b-1) of the component (b), dimethylanilinium tetrakispentafluorophenyl borate, triethylammonium tetraphenylborate, tri-n-butylammonium tetraphenylborate, trimethylammonium tetraphenylborate, Examples thereof include tetraethylammonium tetraphenylborate, methyl (tri-n-butyl) ammonium tetraphenylborate, and benzyl (tri-n-butyl) ammonium tetraphenylborate.

  As the component (b-1), one type may be used alone, or two or more types may be used in combination. On the other hand, examples of the aluminoxane as the component (b-2) include methylaluminoxane, ethylaluminoxane, and isobutylaluminoxane. These aluminoxanes may be used individually by 1 type, and may be used in combination of 2 or more type. Moreover, you may use together 1 type or more of said (b-1) component, and 1 or more types of (b-2) component.

  As the polymerization catalyst, an organoaluminum compound can be used as the component (c) in addition to the components (a) and (b). Here, as the organoaluminum compound of component (c), trimethylaluminum, triethylaluminum, triisopropylaluminum, triisobutylaluminum, dimethylaluminum chloride, diethylaluminum chloride, methylaluminum dichloride, ethylaluminum dichloride, dimethylaluminum fluoride, diisobutyl. Aluminum hydride, diethylaluminum hydride, ethylaluminum sesquichloride, etc. are mentioned. These organoaluminum compounds may be used individually by 1 type, and may be used in combination of 2 or more type. Here, in the polymerization of propylene, at least one catalyst component can be supported on a suitable carrier and used.

The polymerization method is not particularly limited, and any method such as a slurry polymerization method, a gas phase polymerization method, a bulk polymerization method, a solution polymerization method, and a suspension polymerization method may be used, but a bulk polymerization method and a solution polymerization method are particularly preferable. preferable. The polymerization temperature is usually −100 to 250 ° C., and the ratio of the catalyst to the reaction raw material is preferably “raw material monomer / component (A)” (molar ratio) of 1 to 10 ⁸ , more preferably 10 to 1.
0 ⁵ , more preferably 10 ² to 10 ⁵ . Furthermore, the polymerization time is usually preferably 5 minutes to 10 hours, and the reaction pressure is usually preferably normal pressure to 20 MPa (gauge pressure).

[Olefin polymer B]
As described above, the olefin polymer B has a melting endotherm ΔH-D of more than 80 J / g as measured by a differential scanning calorimeter (DSC), and a melting endotherm ΔH-D of 80 to 110 J / g. It is preferable that it is 85-105 J / g.
The details of the olefin polymer B are the same as those of the olefin polymer A described above except that the melting endotherm ΔH-D is different.

The shape of the oil adsorbing member of the first invention of the present invention is not particularly limited, and examples thereof include a sheet shape and a nonwoven fabric shape.
Further, when the oil adsorbing member is in the form of a nonwoven fabric, the fiber constituting the nonwoven fabric may be a core-sheath type composite fiber. In this case, when the sheath component contains the olefin polymer A, it is preferable from the viewpoint of the amount of oil absorption. .

The non-woven fabric-like oil adsorbing member (hereinafter sometimes abbreviated as “non-woven fabric”) is obtained by using a resin containing the olefin polymer A as a raw material, and preferably by a spunbond method. It is manufactured. Usually, in the spunbond method, a melt-kneaded resin composition is spun, stretched and opened to form continuous long fibers, and the continuous long fibers are subsequently deposited on the moving collection surface in a continuous process. A nonwoven fabric is manufactured by combining. In this method, a nonwoven fabric can be produced continuously, and since the fibers constituting the nonwoven fabric are continuous long fibers drawn, the strength is high.
As the spunbond method, a conventionally known method can be employed. For example, fibers are extruded from a large nozzle having several thousand holes or a small nozzle group having, for example, about 40 holes by extrusion of a molten polymer. Can be manufactured. After exiting the nozzle, the molten fiber is cooled by a cross-flow chilled air system, then pulled away from the nozzle and drawn by high velocity air. There are usually two types of air attenuation methods, both of which use the Venturi effect. In the first method, the filament is drawn using a suction slot (slot drawing), and the nozzle width or the machine width is used. The second method draws the filament through a nozzle or suction gun. Filaments formed in this manner are collected on a screen (wire) or a pore-forming belt to form a web. Next, the web passes through the compression roll, then passes between the heated calender rolls, and the raised portion on one roll is bonded at a portion including an area of about 10% to 40% of the web to form a nonwoven fabric. .

  When an external release agent is used in the production of the nonwoven fabric, the external release agent is sprayed on the moving collection surface. When the resin contains an internal release agent, it is not necessary to spray the external release agent on the moving collection surface, but it may be used in combination with the internal release agent from the viewpoint of obtaining good release properties.

[Multi-layer non-woven oil adsorbing member]
The first invention of the present invention also provides a multilayer nonwoven fabric oil-absorbing member, in which at least two layers of nonwoven fabrics are laminated, and one or more of the layers are the nonwoven fabric-like oil adsorption member.
Examples of the layer other than the non-woven fabric oil adsorbing member in the multi-layer non-woven oil adsorbing member include a non-woven fabric made of the olefin polymer B described above.

[Fiber products]
The first invention of the present invention further provides a textile product including at least one of the oil adsorbing member and the multilayer nonwoven fabric oil adsorbing member.
Specific examples of textile products include clean room air filters, electret filters with electret processing, separators, heat insulating materials, coffee bags, food packaging materials, automotive ceiling skin materials, cushion materials, speaker dustproof materials, air cleaner materials, Insulator skins, backing materials, adhesive nonwoven fabric sheets, various automotive parts such as door trims, various cleaning materials such as copier cleaning materials, carpet surface materials and backing materials, agricultural padding, wood drains, sports shoes skins and other shoes For example, a member for a bag, a member for a bag, an industrial sealing material, a wiping material and a sheet.

[Oil adsorption method]
Moreover, 1st invention of this invention provides the oil adsorption | suction method which has a process which makes at least one of the said member for oil adsorption | suction and a multilayer nonwoven fabric-like oil adsorption | suction member and oil contact.
Specifically, the oil adsorption method of the first invention of the present invention can adsorb heavy oil that has flowed out to the sea or river, lubricating oil that has flowed out in a factory, or the like.
The type of oil adsorbed by the oil adsorption method of the first invention of the present invention is not particularly limited. For example, organic solvents such as toluene, heptane, decane, hexane, crude oil, petroleum, heavy oil, lubricating oil, machinery Examples thereof include mineral oil such as oil and volatile oil, and vegetable oil such as edible oil.

Next, the dyeable polyolefin composition according to the second invention of the present invention contains an olefin polymer A having a melting endotherm ΔH-D of 0 to 80 J / g measured by a differential scanning calorimeter (DSC). Moreover, together with the olefin polymer A, an olefin polymer B having a melting endotherm ΔH-D measured by a differential scanning calorimeter (DSC) exceeding 80 J / g may be included.
The dyeable polyolefin composition according to the second aspect of the present invention preferably contains 1 to 99% by mass of the olefin polymer A and 99 to 1% by mass of the olefin polymer B. The olefin polymer What contains 10 to 99% by mass of A and 90 to 1% by mass of olefin polymer B is more preferable, and contains 10 to 95% by mass of olefin polymer A and 90 to 5% by mass of olefin polymer B Are more preferable, and those containing 30 to 90% by mass of the olefin polymer A and 70 to 10% by mass of the olefin polymer B are even more preferable.

[Olefin polymer A]
Specific examples of the olefin polymer A include a propylene homopolymer, an ethylene-propylene copolymer, an ethylene-α-olefin copolymer, a polyα-olefin, and the like, but from the viewpoint of dyeability, a propylene unit. Is preferably a propylene polymer having a copolymerization ratio of 50 mol% or more, more preferably a propylene homopolymer.

As described above, the olefin polymer A has a melting endotherm ΔH-D of 0 to 80 J / g measured by a differential scanning calorimeter (DSC), and a melting endotherm ΔH-D of 5 to 75 J / g. g is preferable, 10 to 70 J / g is more preferable, and 30 to 50 J / g is particularly preferable. If the melting endotherm ΔH-D is more than 80 J / g, the dyeability is poor.
The melting endotherm ΔH-D is determined by DSC measurement. That is, using a differential scanning calorimeter (DSC-7, manufactured by Perkin Elmer Co., Ltd.), 10 mg of the sample was held at −10 ° C. for 5 minutes in a nitrogen atmosphere and then heated at 10 ° C./min. Let the melting endotherm be ΔH−D.

The melting endotherm ΔH-D can be controlled by the structure of the main catalyst and the polymerization conditions when the olefin polymer A is a propylene homopolymer. Moreover, when the olefin polymer A is an ethylene-propylene copolymer, it can be controlled by changing the copolymerization ratio of the ethylene unit and the propylene unit.
For example, when controlling by the structure of a catalyst, it is necessary to design the space where a monomer coordinates to the central metal of a catalyst to an appropriate size. Depending on the size of the coordination space, the insertion of the monomer is difficult to occur, and the activity is reduced. If the structure is a racemic structure, a highly ordered polymer is obtained, and the endothermic amount of melting increases. With a meso-type structure, a polymer with low regularity is likely to be obtained, and the melting endotherm may be low. More specifically, by using a double-crosslinking catalyst described later, it is possible to synthesize a polymer having a melting endotherm ΔH-D of 0 to 80 J / g by controlling the coordination space of the monomer. .
In the present specification, the melting endotherm ΔH-D of 0 J / g means that the crystal melting peak cannot be substantially observed because the crystallization rate is extremely slow in the DSC measurement.

  The olefin polymer A has a molecular weight distribution (Mw / Mn) measured by GPC method of preferably 4.0 or less, more preferably 3.5 or less, still more preferably 3.0 or less, particularly preferably 2.5 or less. It is.

  The olefin polymer A preferably has a weight average molecular weight (Mw) measured by GPC method of 3,000 to 1,000,000, more preferably 10,000 to 200,000, and still more preferably 20,000. ~ 160,000. When the weight average molecular weight (Mw) is 1,000,000 or less, the dyeability becomes better. When the weight average molecular weight (Mw) is 3,000 or more, the molded article containing the dyeable polyolefin composition is dissolved in a solvent or the like. Can be suppressed.

  In the second invention of the present invention, the weight average molecular weight (Mw) and the number average molecular weight (Mn) are a weight average molecular weight and a number average molecular weight in terms of polystyrene measured by a gel permeation chromatography (GPC) method. The molecular weight distribution (Mw / Mn) is a value calculated from these weight average molecular weight (Mw) and number average molecular weight (Mn). In addition, the GPC measurement in this specification was performed with the apparatus and conditions as described in an Example.

  The olefin polymer A may be a propylene polymer having a copolymerization ratio of propylene units of 50 mol% or more as described above. In this case, the copolymerization ratio of propylene units is 60 mol% or more. More preferably, it is more preferably 70 mol% or more, particularly preferably 90 mol% or more, and most preferably 95 mol% or more. Examples of the copolymerizable monomer include ethylene, α-olefins having 4 to 30 carbon atoms such as 1-butene, 1-pentene, 1-hexene, 1-octene and 1-decene, (meth) acrylic acid, (Meth) acrylic acid esters such as methyl (meth) acrylate, vinyl acetate and the like can be mentioned, but it is preferable to use one or more selected from ethylene and an α-olefin having 4 to 30 carbon atoms.

As a method for producing the olefin polymer A, propylene is produced using a metallocene catalyst obtained by combining (a) a transition metal compound forming a crosslinked structure via two crosslinking groups and (b) a cocatalyst. A polymerization method is preferred.
Specifically, a transition metal compound (a) represented by the following general formula (I) and a compound capable of forming an ionic complex by reacting with the transition metal compound of the component (a) or a derivative thereof ( Examples thereof include a method of polymerizing propylene in the presence of a polymerization catalyst containing a promoter component (b) selected from b-1) and aluminoxane (b-2).

In the above general formula (I), M represents a metal element of Groups 3 to 10 of the periodic table or a lanthanoid series, and E ¹ and E ² represent a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a heterocyclo group, respectively. A ligand selected from a pentadienyl group, a substituted heterocyclopentadienyl group, an amide group, a phosphide group, a hydrocarbon group, and a silicon-containing group, and having a crosslinked structure via A ¹ and A ² And they may be the same or different. X represents a σ-bonding ligand, and when there are a plurality of X, the plurality of X may be the same or different and may be cross-linked with other X, E ¹ , E ² or Y. Y represents a Lewis base, and when there are a plurality of Y, the plurality of Y may be the same or different, may be cross-linked with other Y, E ¹ , E ² or X, and A ¹ and A ² are A divalent bridging group that binds two ligands, a hydrocarbon group having 1 to 20 carbon atoms, a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a germanium-containing group, a tin-containing group , -O -, - CO -, - S -, - SO 2 -, - Se -, - NR 1 -, - PR 1 -, - P (O) R 1 -, - BR 1 - or -AlR ¹ - R ¹ represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, or a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, which may be the same or different. q represents an integer of 1 to 5 and represents [(M valence) -2], and r represents an integer of 0 to 3.

  Specific examples of the transition metal compound represented by the general formula (I) include (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (3-n-butylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (3-trimethylsilylmethylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis ( 3-phenylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (4,5-benzoindenyl) zirconium dichloride, (1,2′-dimethylsilylene) ( 2,1′-dimethylsilylene) bis (4-isopropylindenyl) zirconium dichloride, (1,2′-dimethyl) Lucylylene) (2,1′-dimethylsilylene) bis (5,6-dimethylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (4,7-di-) Isopropylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (4-phenylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1 ′ -Dimethylsilylene) bis (3-methyl-4-isopropylindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-dimethylsilylene) bis (5,6-benzoindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-isopropylidene) -bis (indenyl) Zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-isopropylidene) -bis (3-methylindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-isopropylidene ) -Bis (3-isopropylindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-isopropylidene) -bis (3-n-butylindenyl) zirconium dichloride, (1,2 ' -Dimethylsilylene) (2,1'-isopropylidene) -bis (3-trimethylsilylmethylindenyl) zirconium dichloride and the like, and those obtained by substituting zirconium in these compounds with titanium or hafnium.

  Next, as the component (b-1) of the component (b), dimethylanilinium tetrakispentafluorophenyl borate, triethylammonium tetraphenylborate, tri-n-butylammonium tetraphenylborate, trimethylammonium tetraphenylborate, Examples thereof include tetraethylammonium tetraphenylborate, methyl (tri-n-butyl) ammonium tetraphenylborate, and benzyl (tri-n-butyl) ammonium tetraphenylborate.

  As the component (b-1), one type may be used alone, or two or more types may be used in combination. On the other hand, examples of the aluminoxane as the component (b-2) include methylaluminoxane, ethylaluminoxane, and isobutylaluminoxane. These aluminoxanes may be used individually by 1 type, and may be used in combination of 2 or more type. Moreover, you may use together 1 type or more of said (b-1) component, and 1 or more types of (b-2) component.

  As the polymerization catalyst, an organoaluminum compound can be used as the component (c) in addition to the components (a) and (b). Here, as the organoaluminum compound of component (c), trimethylaluminum, triethylaluminum, triisopropylaluminum, triisobutylaluminum, dimethylaluminum chloride, diethylaluminum chloride, methylaluminum dichloride, ethylaluminum dichloride, dimethylaluminum fluoride, diisobutyl. Aluminum hydride, diethylaluminum hydride, ethylaluminum sesquichloride, etc. are mentioned. These organoaluminum compounds may be used individually by 1 type, and may be used in combination of 2 or more type. Here, in the polymerization of propylene, at least one catalyst component can be supported on a suitable carrier and used.

The polymerization method is not particularly limited, and any method such as a slurry polymerization method, a gas phase polymerization method, a bulk polymerization method, a solution polymerization method, and a suspension polymerization method may be used, but a bulk polymerization method and a solution polymerization method are particularly preferable. preferable. The polymerization temperature is usually −100 to 250 ° C., and the ratio of the catalyst to the reaction raw material is preferably “raw material monomer / the above component (A)” (molar ratio), preferably 1 to 10 ⁸ , more preferably 10 to 10 ⁵ , Preferably it is 10 < ² > -10 < ⁵ >. Furthermore, the polymerization time is usually preferably 5 minutes to 10 hours, and the reaction pressure is usually preferably normal pressure to 20 MPa (gauge pressure).

[Olefin polymer B]
As described above, the olefin polymer B has a melting endotherm ΔH-D measured by a differential scanning calorimeter (DSC) of more than 80 J / g, and the melting endotherm ΔH-D exceeds 80 J / g. It is preferably 110 J / g or less, and more preferably 85 to 105 J / g.
The details of the olefin polymer B are the same as those of the olefin polymer A described above except that the melting endotherm ΔH-D is different.

[Dyeable molding]
The dyeable polyolefin composition of the second invention of the present invention can be molded into a dyeable molded article. Although the form of the dyeable molded object of the 2nd invention of this invention is not specifically limited, For example, a film, a sheet | seat, or a fiber is mentioned, A nonwoven fabric may be sufficient.
In addition, when the dyeable molded body is a nonwoven fabric, the fiber constituting the nonwoven fabric may be a core-sheath type composite fiber. In this case, when the sheath component contains the olefin polymer A, from the viewpoint of dyeability. preferable.

The non-woven fabric which is the dyeable molded article of the second invention of the present invention is obtained using a resin containing the olefin polymer A as a raw material, and is preferably produced by a spunbond method. . Usually, in the spunbond method, a melt-kneaded resin composition is spun, stretched and opened to form continuous long fibers, and the continuous long fibers are subsequently deposited on the moving collection surface in a continuous process. A nonwoven fabric is manufactured by combining. In this method, a nonwoven fabric can be produced continuously, and since the fibers constituting the nonwoven fabric are continuous long fibers drawn, the strength is high.
As the spunbond method, a conventionally known method can be employed. For example, fibers are extruded from a large nozzle having several thousand holes or a small nozzle group having, for example, about 40 holes by extrusion of a molten polymer. Can be manufactured. After exiting the nozzle, the molten fiber is cooled by a cross-flow chilled air system, then pulled away from the nozzle and drawn by high velocity air. There are usually two types of air attenuation methods, both of which use the Venturi effect. In the first method, the filament is drawn using a suction slot (slot drawing), and the nozzle width or the machine width is used. The second method draws the filament through a nozzle or suction gun. Filaments formed in this manner are collected on a screen (wire) or a pore-forming belt to form a web. Next, the web passes through the compression roll, then passes between the heated calender rolls, and the raised portion on one roll is bonded at a portion including an area of about 10 to 40% of the web to form a nonwoven fabric.

  When an external release agent is used in the production of the nonwoven fabric, the external release agent is sprayed on the moving collection surface. When the resin contains an internal release agent, it is not necessary to spray the external release agent on the moving collection surface, but it may be used in combination with the internal release agent from the viewpoint of obtaining good release properties.

The dyeable molded article of the second invention of the present invention is formed by laminating at least two layers of nonwoven fabric, and any one or more layers thereof are the nonwoven fabric as the dyeable molded article of the second invention of the present invention. It may be a multilayer nonwoven fabric.
As a layer other than the nonwoven fabric as the dyeable molded article of the second invention of the present invention in the multilayer nonwoven fabric, for example, a nonwoven fabric made of the above-mentioned olefin polymer B can be mentioned.

Moreover, 2nd invention of this invention can also provide the textiles containing the said dyeable molded object.
Specific examples of textile products include clean room air filters, electret filters with electret processing, separators, heat insulating materials, coffee bags, food packaging materials, automotive ceiling skin materials, cushion materials, speaker dustproof materials, air cleaner materials, Insulator skins, backing materials, adhesive nonwoven fabric sheets, various automotive parts such as door trims, various cleaning materials such as copier cleaning materials, carpet surface materials and backing materials, agricultural padding, wood drains, sports shoes skins and other shoes For example, a member for a bag, a member for a bag, an industrial sealing material, a wiping material, a sheet, etc. can be mentioned.

[Dyeing method]
Moreover, 2nd invention of this invention provides the dyeing | staining method which has the process of immersing or contacting the said dyeable polyolefin composition or dyeable molded object in the solution which melt | dissolved dye. According to the dyeing method of the second invention of the present invention, the dyeable polyolefin composition or the dyeable molded article of the second invention of the present invention can be simply and simply immersed or brought into contact with a solution in which the dye is dissolved. Can be dyed. According to the second invention of the present invention, a dyed product dyed by the dyeing method can be provided. In addition, it does not specifically limit about dye, A commercial item can be used.

  First, the first invention of the present invention will be described in more detail with reference to examples, but the first invention of the present invention is not limited to these examples.

Example 1
80 parts by mass of low crystalline polypropylene B (low crystalline PP-B) and 20 parts by mass of high crystalline polypropylene (high crystalline PP) are kneaded in a lab plast mill at 180 ° C. and 120 rpm for 5 minutes to obtain a resin composition. I got a thing.
Using the obtained resin composition, after preheating for 5 minutes using a hydraulic hot press molding machine set at 200 ° C., pressurizing at 10 MPa for 10 minutes, and then at 20 ° C. under a pressure of 10 MPa for 5 minutes. It cooled and manufactured the sheet | seat of thickness 1mm.
The oil absorption performance of the obtained sheet was evaluated as follows. The results are shown in Table 2.

[Evaluation of oil absorption performance]
The sheet was cut into a size of about 10 mm × about 30 mm × about 1 mm to obtain an oil adsorbing member piece used for the test.
First, the surface area of the oil adsorbing member piece was calculated based on the following equation.
Surface area (mm ² ) of oil adsorbing member piece = length × width × 2 + length × thickness × 2 + width × thickness × 2
Further, after measuring the mass of the oil adsorbing member piece, it is immersed in a predetermined oil at a temperature of 25 to 30 ° C., taken out after a predetermined time, and measured after immersion, based on the following formula: The increased mass was calculated.
Increased mass (g) = mass of oil adsorbing member piece before dipping-mass of oil adsorbing member piece before dipping Further, the surface area and increased mass of the oil adsorbing member piece calculated as described above, and the following formula Based on the above, the mass increase per surface area was calculated.
Increased mass per surface area (g / m ² ) = Increased mass / (Surface area of oil adsorbing member piece × 10 ⁻⁶ )
In addition, the kind of oil which immersed the member piece for oil adsorption is as follows.
・ Toluene: Wako Pure Chemical Industries, Ltd., reagent special grade ・ Lubricant: Idemitsu Kosan Co., Ltd., Daphne Super Multi Oil 10

Examples 2-18 and Comparative Examples 1-2
A sheet was produced in the same manner as in Example 1 except that the resin composition used in the production of the sheet and the oil and immersion time used in the evaluation of the oil absorption performance were changed as shown in Tables 2 and 3, respectively. The oil absorption performance was evaluated. The results are shown in Tables 2 and 3.

  The characteristics of each resin used for manufacturing the sheet were evaluated by the following methods. The results are shown in Table 1.

[Melting endotherm ΔH-D]
Using a differential scanning calorimeter (trade name: DSC-7, manufactured by Perkin Elmer Co., Ltd.), holding 10 mg of a sample at −10 ° C. for 5 minutes in a nitrogen atmosphere, and then raising the temperature at 10 ° C./min The obtained melting endotherm was determined as ΔH-D (J / g).

[Weight average molecular weight (Mw), molecular weight distribution (Mw / Mn) measurement]
The weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn) were determined by gel permeation chromatography (GPC). For the measurement, the following apparatus and conditions were used, and a weight average molecular weight in terms of polystyrene was obtained.
<GPC measurement device>
Column: TOSO GMHHR-H (S) HT
Detector: RI detector for liquid chromatogram WATERS 150C
<Measurement conditions>
Solvent: 1,2,4-trichlorobenzene Measurement temperature: 145 ° C
Flow rate: 1.0 ml / min Sample concentration: 2.2 mg / ml
Injection volume: 160 μl
Calibration curve: Universal Calibration
Analysis program: HT-GPC (Ver.1.0)

[Melt flow rate (MFR)]
According to JIS K7210, the measurement was performed under conditions of a temperature of 230 ° C. and a load of 21.18N.

・ Low crystalline polypropylene A (low crystalline PP-A): “El Modu S400” manufactured by Idemitsu Kosan Co., Ltd.
Low crystallinity polypropylene B (low crystallinity PP-B): manufactured by Idemitsu Kosan Co., Ltd., “El Modu S901”
Highly crystalline polypropylene (highly crystalline PP): “E-103WA” manufactured by Prime Polymer Co., Ltd.

  Next, although the 2nd invention of the present invention is explained still in detail by an example, the 2nd invention of the present invention is not limited at all by these.

The resins used in the following examples are shown below.
(1) Olefin polymer A
Low crystalline polypropylene (low crystalline PP): "El Modu S901" manufactured by Idemitsu Kosan Co., Ltd.
(2) Olefin polymer B
High crystalline polypropylene (high crystalline PP): “E-103WA” manufactured by Prime Polymer Co., Ltd.

The measuring method of the characteristics of each resin is as follows. The results are shown in Table 4.
[Melting endotherm ΔH-D]
Using a differential scanning calorimeter ("DSC-7" manufactured by Perkin Elmer Co., Ltd.), 10 mg of the sample was held at -10 ° C for 5 minutes in a nitrogen atmosphere and then heated at 10 ° C / min. The melting endotherm was determined as ΔH-D (J / g).

[Weight average molecular weight (Mw), molecular weight distribution (Mw / Mn) measurement]
The weight average molecular weight (Mw) and the number average molecular weight (Mn) were measured as polystyrene-converted values under the following apparatus and conditions to determine the molecular weight distribution (Mw / Mn).
<GPC measurement device>
Column: “TOSO GMHHR-H (S) HT” manufactured by Tosoh Corporation
Detector: RI detector for liquid chromatogram (“WATERS 150C” manufactured by Waters Corporation)
<Measurement conditions>
Solvent: 1,2,4-trichlorobenzene Measurement temperature: 145 ° C
Flow rate: 1.0 ml / min Sample concentration: 2.2 mg / ml
Injection volume: 160 μl
Calibration curve: Universal Calibration
Analysis program: HT-GPC (Ver.1.0)

[Melt flow rate (MFR)]
According to JIS K7210, the measurement was performed under conditions of a temperature of 230 ° C. and a load of 21.18N.

[B type viscosity]
The measurement was performed at 190 ° C. using a B-type viscometer.

Example 19
80% by mass of low crystalline polypropylene (low crystalline PP) and 20% by mass of high crystalline polypropylene (high crystalline PP) were kneaded in a lab plast mill at 180 ° C. and 120 rpm for 5 minutes to obtain a resin composition. Obtained.
Using the obtained resin composition, after preheating for 5 minutes using a hydraulic hot press molding machine set at 200 ° C., pressurizing at 10 MPa for 10 minutes, and then at 20 ° C. under a pressure of 10 MPa for 5 minutes. It cooled and manufactured the sheet | seat of thickness 1mm.
The obtained sheet | seat was dye | stained by the method mentioned later, and dyeing | staining property was evaluated.

Example 20
The resin composition and the sheet were obtained in the same manner as in Example 1 except that the composition ratio of the low crystalline PP and the high crystalline PP was changed to 60% by mass of the low crystalline PP and 40% by mass of the high crystalline PP. Manufactured and evaluated for dyeability.

Example 21
The resin composition and the sheet were obtained in the same manner as in Example 1 except that the composition ratio of the low crystalline PP and the high crystalline PP was changed to 20% by mass of the low crystalline PP and 80% by mass of the high crystalline PP. Manufactured and evaluated for dyeability.

Example 22
The resin composition and the sheet were obtained in the same manner as in Example 1 except that the composition ratio of the low crystalline PP and the high crystalline PP was changed to 10% by mass of the low crystalline PP and 90% by mass of the high crystalline PP. Manufactured and evaluated for dyeability.

Comparative Example 3
The resin composition and the sheet were obtained in the same manner as in Example 1 except that the composition ratio of the low crystalline PP and the high crystalline PP was changed to 0% by mass of the low crystalline PP and 100% by mass of the high crystalline PP. Manufactured and evaluated for dyeability.

[Evaluation of dyeability]
The dyeability of the obtained sheet was evaluated as follows.
The sheet was cut into a size of about 10 mm × about 30 mm × about 1 mm to obtain a test piece.
As a dye solution, 0.3% by mass of “Sumiplast Blue SR” (Dye 1), “Sumiplast Red HL2B” (Dye 2), or “Sumiplast Yellow HLR” (Dye 3) (both manufactured by Sumika Chemtex Co., Ltd.) The contained toluene solution was used.
After immersing the test piece in the dye solution at 25 ° C. for 1 hour, the surface of the test piece was wiped off with a paper wiping cloth (registered trademark: Kim Towel), washed with ethanol, and air-dried. The appearance of the test piece was visually observed and compared with a standard color sample to evaluate the dyeability. As the standard color sample, a “new color card 199b” created based on the PCCS201 system was used. PCCS (Practical Color Co-ordinate system) is a color system developed by the Japan Color Research Institute. A method of expressing with two attributes of “hue” and “tone” was adopted.
○: The classification by the PCCS color system is a classification of darker shades than the off-neutral system and the achromatic system.
X: Classification by the PCCS color system is a classification of (a) off-neutral system, (b) achromatic system, and (c) lighter shade than the off-neutral system and achromatic system.

The evaluation results are shown in Table 5. Moreover, about Example 19 and 20 and the comparative example 3, the photograph of the external appearance of the test piece after dyeing | staining is shown in FIG. 1A shows the appearance of Example 19, FIG. 1B shows the appearance of Example 20, and FIG. 1C shows the appearance of the test piece after dyeing of Comparative Example 3. FIG. In each figure, it is the test piece immersed in the solution of dye 1, 2, 3 in order from the left.
As is apparent from the results of Table 5 and FIG. 1, even when an attempt was made to dye a sheet made of only highly crystalline polypropylene having a melting endotherm ΔH-D of 99 J / g, it was hardly dyed (Comparative Example 3). In contrast, a sheet made of a resin composition in which a low crystalline polypropylene having a melting endotherm ΔH-D of 40 J / g and a high crystalline polypropylene having a melting endotherm ΔH-D of 99 J / g is mixed in any of three colors. (Examples 19 to 22). In particular, the sheets of Examples 19 and 20 made of a resin composition containing 60% by mass or more of low crystalline polypropylene could be dyed more intensely.

Example 23
The test piece obtained in the evaluation of the dyeability of Example 19 was immersed in a dye solution containing 0.3% by mass of Dye 1 at 25 ° C. for 1 hour, 3 hours or 5 hours, respectively. Obtained.
The surface of each test piece dyed with a paper wiping cloth (registered trademark: Kim Towel) soaked with ethanol was wiped off and visually observed for color transfer. The results are shown in Table 6.

Example 24
Except that the test piece in Example 23 was changed to the test piece obtained in the dyeability evaluation of Example 20, it was visually observed for color transfer in the same manner as in Example 23. The results are shown in Table 6.

Example 25
The test piece obtained by evaluating the dyeability of Example 19 was immersed in a dye solution containing 0.3% by mass of Dye 1 at 25 ° C. for 5 hours to obtain a dyed test piece.
The dyed test piece was washed with 0.75 g / L of a laundry detergent (trade name: “Top Platinum Clear”, manufactured by Lion Corporation) at 25 ° C. for 3 hours, and the dyed test piece was washed. Visual observation was made to see if color fading occurred.

Example 26
Except that the washing condition was changed to 60 ° C. for 2 hours, it was visually observed whether or not color fading due to washing occurred in the dyed test piece in the same manner as in Example 25.

Example 27
Except that the washing conditions were changed to 80 ° C. for 1 hour, it was visually observed whether or not color fading due to washing occurred in the dyed test pieces in the same manner as in Example 25.

As a result of Examples 25 to 27, none of the colors of the test pieces was changed, and the cleaning liquid was not colored.
From the results of Examples 23 to 27, it can be seen that the dyeable molded article of the present invention is suitable as a fiber for clothing because the color does not transfer and is not easily discolored by washing.

Since the oil adsorbing member according to the first aspect of the present invention exhibits high oil absorption performance, the oil can be efficiently recovered when recovering heavy oil that has flowed out to the sea.
In addition, the dyeable polyolefin composition and the dyeable molded article according to the second invention of the present invention are excellent in dyeability, and have little dyeing unevenness, discoloration, and strength reduction. Therefore, it is particularly suitable as a clothing fiber.

Claims (21)

  An oil adsorbing member comprising an olefin polymer A having a melting endotherm ΔH-D of 0 to 80 J / g as measured by a differential scanning calorimeter (DSC).   The olefin polymer A contains 30 to 99% by mass of olefin polymer A and 1 to 70% by mass of olefin polymer B having a melting endotherm ΔH-D measured by a differential scanning calorimeter (DSC) of more than 80 J / g. The member for oil adsorption as described in 2.   The oil adsorbing member according to claim 2, wherein the olefin polymer B is a propylene polymer.   The member for oil adsorption according to claim 1, wherein the olefin polymer A is a propylene polymer.   It is a sheet form, The member for oil adsorption in any one of Claims 1-4.   It is a nonwoven fabric form, The member for oil adsorption | suction in any one of Claims 1-4.   The oil adsorbing member according to claim 6, wherein the fiber constituting the nonwoven fabric is a core-sheath type composite fiber, and the sheath component contains the olefin polymer A.   A multilayer nonwoven fabric-like member for adsorbing oil comprising at least two layers of nonwoven fabric, and one or more of the layers are oil-absorbing members according to claim 6 or 7.   A textile product comprising at least one of the oil adsorbing member according to any one of claims 1 to 7 and the multilayer nonwoven fabric-like oil adsorbing member according to claim 8.   An oil adsorption method comprising a step of contacting at least one of the oil adsorbing member according to any one of claims 1 to 7 and the multilayer nonwoven fabric-like oil adsorbing member according to claim 8 with oil.   The oil adsorption method according to claim 10, wherein the oil contains mineral oil.   A dyeable polyolefin composition comprising an olefin polymer A having a melting endotherm ΔH-D measured by a differential scanning calorimeter (DSC) of 0 to 80 J / g.   10 to 99% by mass of the olefin polymer A, 90 to 1% by mass of olefin polymer B having a melting endotherm ΔH-D measured by a differential scanning calorimeter (DSC) exceeding 80 J / g, Item 13. A dyeable polyolefin composition according to Item 12.   30 to 90% by mass of the olefin polymer A and 70 to 10% by mass of olefin polymer B having a melting endotherm ΔH-D measured by a differential scanning calorimeter (DSC) exceeding 80 J / g, Item 14. The dyeable polyolefin composition according to Item 12 or 13.   The dyeable polyolefin composition according to claim 13 or 14, wherein the olefin polymer B is a propylene polymer.   The dyeable polyolefin composition according to any one of claims 12 to 15, wherein the olefin polymer A is a propylene polymer.   The dyeable molded object formed by shape | molding the dyeable polyolefin composition in any one of Claims 12-16.   The dyeable molded article according to claim 17, which is a film, a sheet or a fiber.   The dyeable molded article according to claim 17 or 18, which is a nonwoven fabric.   Dyeing which has the process of immersing or contacting the dyeable polyolefin composition according to any one of claims 12 to 16 or the dyeable molding according to any one of claims 17 to 19 in a solution in which the dye is dissolved. Method.   A dyed product dyed by the dyeing method according to claim 20.