TW202206533A - Dyeable polyolefin composition, dyeable polyolefin fiber and method for producing the same - Google Patents

Abstract

The present invention relates to a dyeable polyolefin composition, a dyeable polyolefin fiber and a method for producing the same. The dyeable polyolefin composition comprises a polyolefin, an inorganic material and a modified polyolefin. The polyolefin includes a first polymer. The inorganic material has a surface modification group including an anchoring group and/or a dyeable group. The dyeable polyolefin fiber with excellent dyeing property of the present invention is obtained by subjecting to a blending step and a spinning step.

Description

Dyeable polyolefin composition, preparation method of dyeable polyolefin fiber, and dyeable polyolefin fiber

The present invention relates to a polyolefin composition, in particular to provide a polyolefin composition with good dyeability, a method for producing dyeable polyolefin fibers, and dyeable polyolefin fibers.

With the improvement of the properties of organic materials and the improvement of textile technology, functional clothing made from polymer materials has been widely used by various clothing manufacturers. Among them, by adjusting the functional groups of the polymer material, the polymer fibers obtained by spinning can have different characteristics and meet different application requirements. Among them, for the purpose of environmental protection, polyolefin fibers that are easily decomposed and do not produce toxic pollutants after combustion are widely used.

However, since polyolefin fibers do not have polar groups and have high hydrophobicity, polyolefin fibers have poor dyeability, which limits their application range. In order to improve the dyeability of polyolefin fibers, oil-based pigments are generally used for dyeing. However, the pigments produced by different manufacturers may exhibit different color performances due to different particle sizes of the pigments, so they cannot meet the needs of the application side.

In view of this, there is an urgent need to provide a dyeable polyolefin composition, a method for producing a dyeable polyolefin fiber, and a dyeable polyolefin fiber, so as to improve the dyeability of the polyolefin fiber and improve the defects of the conventional polyolefin fiber.

Therefore, one aspect of the present invention is to provide a dyeable polyolefin composition. The dyeable polyolefin composition comprises a specific inorganic material and a modified polyolefin, and can have good dyeability.

Another aspect of the present invention is to provide a method for producing dyeable polyolefin fibers. The production method is to prepare dyeable polyolefin fibers by kneading and spinning the above-mentioned dyeable polyolefin composition.

Another aspect of the present invention is to provide a dyeable polyolefin fiber, which is produced by the aforementioned production method.

According to an aspect of the present invention, a dyeable polyolefin composition is provided. The dyeable polyolefin composition includes polyolefin, inorganic material and modified polyolefin. The polyolefin includes a first polymer, wherein the first polymer is polymerized from a mixture, and the mixture includes at least propylene. The crystallinity of the polyolefin is 20% to 90%. The inorganic material has surface modification groups, and the surface modification groups may include anchor groups and/or dyeable groups. The modified polyolefin has a main chain structure and side chain modified groups, wherein the main chain structure is polymerized by reactants, the reactants include propylene, and the side chain modified groups include maleic anhydride groups. Based on 100 weight percent of the dyeable polyolefin composition, the content of polyolefin is 70 to 99.9 weight percent, the content of inorganic material is 0.05 to 10 weight percent, and the content of modified polyolefin is 0.05 Weight percent to 20 weight percent.

According to an embodiment of the present invention, the aforementioned mixture may optionally contain ethylene, butene, hexene and/or octene.

According to another embodiment of the present invention, the aforementioned polyolefin may optionally include a second polymer, and the second polymer may include an ethylene propylene rubber material and/or a polyolefin elastomer.

According to another embodiment of the present invention, the aforementioned polyolefin may optionally include a second polymer, and the second polymer may include atactic polypropylene.

According to yet another embodiment of the present invention, based on the amount of the aforementioned polyolefin being used as 100% by weight, the content of hetero-excluded polypropylene is 0% by weight to 20% by weight.

According to yet another embodiment of the present invention, the aforementioned surface modification group comprises a quaternary amine salt group.

According to yet another embodiment of the present invention, the graft ratio of the aforementioned side chain modified groups is 0.1% to 15%.

According to yet another embodiment of the present invention, the aforementioned modified polyolefin may comprise polypropylene grafted maleic anhydride. Wherein, based on 100 weight percent of modified polyolefin, the content of polypropylene grafted maleic anhydride is 55 to 75 weight percent.

According to another aspect of the present invention, a method for producing dyeable polyolefin fibers is provided. In this manufacturing method, the aforementioned dyeable polyolefin composition is first kneaded to form a kneaded product. Wherein, the crystallinity of the polyolefin in the kneaded product is 20% to 90%. Then, the kneaded product is spun to obtain the dyeable polyolefin fiber of the present invention.

According to another aspect of the present invention, a dyeable polyolefin fiber is provided, which is produced by the aforementioned production method.

Applying the dyeable polyolefin composition, the method for producing dyeable polyolefin fiber, and the dyeable polyolefin fiber of the present invention, by adding specific inorganic materials and modifying polyolefin to the polyolefin substrate, the polyolefin can be reduced. The crystallinity of the olefin base material can further effectively improve the dyeable properties of the polyolefin base material, thereby obtaining a dyeable polyolefin composition. Secondly, when a specific polymerized monomer is selected to form the first polymer of the polyolefin, the polymer segment formed by the specific polymerized monomer can further reduce the crystallinity of the polyolefin substrate, so as to improve the dyeability of the polyolefin composition. Dyeable properties. In addition, the dyeability of the resulting dyeable polyolefin composition can be further enhanced when additionally adding a second polymer and/or heteroarray polypropylene to the polyolefin substrate.

The manufacture and use of embodiments of the present invention are discussed in detail below. It should be appreciated, however, that the embodiments provide many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are provided for illustration only, and are not intended to limit the scope of the invention.

The dyeable polyolefin composition of the present invention includes polyolefin, inorganic materials and modified polyolefin, and the dyeable polyolefin composition can be prepared by mixing and spinning processes to obtain dyeable polyolefin fibers.

Polyolefin

The polyolefin includes a first polymer, and the first polymer is polymerized from a mixture, wherein the mixture includes propylene. In some embodiments, the first polymer can be polypropylene. In some embodiments, the mixture may optionally include other alkenyl compounds that are copolymerizable with propylene. For example, the alkenyl compound may include, but is not limited to, ethylene, butene, hexene, octene, or any mixture of the foregoing alkenyl compounds. Preferably, the other alkenyl compounds may contain ethylene.

In these specific examples, based on the total use amount of the mixture is 100% by weight, the use amount of propylene can be from 20% by weight to 100% by weight, the use amount of ethylene can be from 0% by weight to 20% by weight, and the use amount of butene can be The amount may be 0 to 20 weight percent, the amount of hexene used may be 0 to 20 percent by weight, and the amount of octene used may be 0 to 20 percent by weight.

When the first polymer is formed by copolymerizing propylene with other alkenyl compounds, the copolymerized segments formed by other alkenyl compounds can be inserted into the propylene polymerized segments, which can reduce the crystallinity of the polyolefin and increase the The copolymerized segments formed by other alkenyl compounds have better dyeability, so these copolymerized segments help to improve the dyeability of the dyeable polyolefin composition.

In some embodiments, the polyolefin may selectively include a second polymer different from the first polymer, and the second polymer includes an ethylene propylene rubber material and/or a polyolefin elastomer (POE). For example, the ethylene propylene rubber material may include, but is not limited to, ethylene propylene rubber (EPR), ethylene propylene diene-terpolymer (EPDM), other suitable ethylene propylene rubber materials, or Any mixture of the above materials.

When the polyolefin includes the second polymer, the content of the first polymer may be greater than or equal to 50 weight percent and less than 100 weight percent based on 100 weight percent of the polyolefin, and the content of the second polymer may be Greater than 0 weight percent and less than or equal to 50 weight percent.

Preferably, the content of the first polymer may be 80 to 99.9 percent by weight, and the content of the second polymer may be 0.1 to 20 percent by weight based on 100 percent by weight of polyolefin.

When the polyolefin contains the second polymer, during the kneading process, the polymer chain of the second polymer can be entangled with the polymer chain of the first polymer due to the action of high temperature and shearing force, which can reduce the The crystallinity of the polyolefin can thus further enhance the dyeability of the dyeable polyolefin composition.

In some embodiments, the aforementioned second polymer may optionally include atactic polypropylene.

Based on 100 wt % of polyolefin, the content of heterocylic polypropylene can be 0 to 20 wt %, preferably 0.1 to 20 wt %, and more preferably 5 to 15 wt %.

When the polyolefin contains heterotactic polypropylene, the heterotactic polypropylene can be distributed in the first polymer during the kneading process, thereby reducing the crystallinity of the polyolefin, thus further improving the dyeability of the dyeable polyolefin composition. nature. It should be noted that, during the mixing process, the isotacticity of heteroarranged polypropylene will not change.

The crystallinity of the polyolefin of the present invention may be 20% to 90%, preferably 20% to 60%, and more preferably 35% to 45%. When the crystallinity of polyolefin is less than 20%, although the base material formed by polyolefin may have better dyeability, the mechanical properties of polyolefin fibers obtained by spinning are too low to meet application requirements. When the crystallinity of the polyolefin is greater than 90%, the dyeable polyolefin composition is not easily dyed, thereby reducing its dyeability. It can be understood that the above-mentioned "crystallinity of polyolefin" refers to the crystallinity of polyolefin before the polyolefin is mixed with the inorganic material and the modified polyolefin. Accordingly, by (1) kneading the below-mentioned inorganic material and modified polyolefin; (2) copolymerizing propylene and other alkenyl compounds to form the first polymer; (3) adding the second polymer to the polyolefin ; and/or (4) adding heterocyst polypropylene to the polyolefin, the arrangement of the polyolefin molecular chain after mixing can be adjusted, thereby reducing the crystallinity of the polyolefin substrate, thereby improving the dyeable polyolefin composition. Dyeable nature.

Based on the usage amount of the dyeable polyolefin composition being 100 weight percent, the usage amount of the polyolefin may be 70 weight percent to 99.9 weight percent, preferably 80 weight percent to 99 weight percent, and more preferably 90 weight percent to 95 weight percent weight percent.

When the amount of polyolefin used is less than 70 weight percent, too little base material (ie, polyolefin) will be unfavorable for spinning to form polyolefin fibers, which cannot meet the requirements.

Inorganic materials

The inorganic material of the present invention has a surface modification group, and the surface modification group includes an anchor group and/or a dyeable group.

The "anchor group" referred to in the present invention can interact with the aforementioned polyolefin (eg, covalent bonding and/or intermolecular force), thereby helping to disperse the inorganic material in the polyolefin, thereby enhancing the prepared Dyeable properties of dyeable polyolefin compositions. Secondly, the "dyeable group" referred to in the present invention refers to a functional group that can form a physical bond and/or a chemical bond with the dye molecule. In other words, when the chemical structure of the material has dyeable groups, the dyeable groups help to bind the material to the dye molecules, so that the material has good dyeability properties.

The surface modification groups (ie, the anchor group and the dyeable group) of the present invention are not particularly limited. The selected anchor group can interact with polyolefin, and the selected dyeable group can be combined with dye molecules. In some specific examples, the surface modification groups may include, but are not limited to, quaternary amine salt groups, phosphate groups, metal cation groups containing nickel, iron, calcium, magnesium, sodium and other ions, and others that can satisfy the aforementioned effects. effect group, or any combination of the above groups.

Preferably, the surface modification group can be a quaternary amine salt group and/or a phosphate group.

It can be understood that inorganic materials generally have a porous structure, so in the dyeing process, in addition to the role of the aforementioned dyeable groups, dye molecules can also be adsorbed by inorganic materials, so that the dyeable polyolefin composition containing inorganic materials has good performance. dyeability.

In some embodiments, the inorganic materials of the present invention may include, but are not limited to, clay materials with surface modifying groups, silica, titania, zeolite, hydrotalcite, calcium carbonate, sodium carbonate, other suitable materials, or the above Any mix of materials.

According to the above description, when the inorganic material contains the surface modification group of the anchoring group, during the kneading process, the anchoring group can make the inorganic material evenly dispersed in the polyolefin, so it is helpful to improve the dyeable polyolefin composition dyeability. When the inorganic material contains the surface modification group of the dyeable group, the inorganic material can effectively improve the dyeability of the dyeable polyolefin composition.

In the subsequent kneading process, the inorganic material with surface modification groups can be uniformly dispersed in the polyolefin substrate, which can reduce the crystallinity of the polyolefin, thereby helping to improve the dyeability of the dyeable polyolefin composition. nature.

In some specific examples, the inorganic materials may include, but are not limited to, montmorillonite modified with quaternary amine salt groups, silicon dioxide, titanium dioxide, zeolite, hydrotalcite, calcium carbonate, sodium carbonate, and other inorganic materials that meet the foregoing descriptions , or any mixture of the above materials. Preferably, the inorganic material of the present invention is an organically modified layered material.

For example, the inorganic material of the present invention may comprise montmorillonite modified with quaternary amine salt groups, and the usage amount of the inorganic material is 100% by weight, the use of montmorillonite modified with quaternary amine salt groups The amount may be 20 to 50 weight percent, and preferably 30 to 45 weight percent. Wherein, when the amount of montmorillonite modified with quaternary amine salt group is within the aforementioned range, during the mixing process, an appropriate amount of montmorillonite modified with quaternary amine salt group can be added to the molten polyolefin. It has good fluidity and can be uniformly dispersed in the polyolefin substrate, thereby improving the dyeability of the dyeable polyolefin composition.

Based on the usage amount of the dyeable polyolefin composition being 100 weight percent, the usage amount of the inorganic material may be 0.05 weight percent to 10 weight percent, and preferably 2 weight percent to 6 weight percent.

When the amount of the inorganic material used is less than 0.05 wt%, too little inorganic material cannot reduce the crystallinity of the polyolefin, and it is difficult to effectively improve the dyeability of the dyeable polyolefin composition. When the amount of inorganic materials used is greater than 10 wt%, although the crystallinity of polyolefin can be effectively reduced and the dyeability can be improved significantly, too much inorganic materials tend to agglomerate during the kneading process and cannot be uniformly dispersed In the polyolefin substrate, the dyeing effect is further reduced, and the too low crystallinity also greatly reduces the mechanical properties of the dyeable polyolefin fibers obtained by spinning.

Modified polyolefin

The modified polyolefin of the present invention can have a main chain structure and side chain modified groups, and the main chain structure can be a polyolefin polymer segment. Wherein, the main chain structure can be formed by the polymerization of reactants, and the reactants include alkenyl compounds. In some embodiments, the reactants may include, but are not limited to, propylene, ethylene, butene, hexene, octene, other suitable alkenyl compounds, or any combination of the foregoing.

Preferably, the side chain modifying group can be, for example, a dyeable group. When the side chain modified group is a dyeable group, during the kneading process, since the modified polyolefin can be mixed with the polyolefin evenly, and the side chain modified group can be mixed with the surface modified group of the inorganic material (which can be Dye base) attracts, and helps to make the inorganic material more uniformly dispersed in the polyolefin substrate, so as to further reduce the crystallinity of the polyolefin substrate, and then improve the dyeability of the dyeable polyolefin composition. In some specific examples, the side chain modifying group can be maleic anhydride group, maleic acid group, acrylic acid group, methacrylic acid group, methyl methacrylate group, ethyl acrylate group group, other suitable functional groups, or any combination of the above groups. For example, polypropylene with a side chain modified group of maleic anhydride can bond with the inorganic material through the maleic anhydride group, and use the polypropylene segment to attract the polyolefin, so that the inorganic material can be further dispersed in polyolefin. Among them, the polypropylene grafted with maleic anhydride group can be used as an anchor group to improve the dyeability of polyolefin. In addition, the dyeability of polyolefins is further enhanced by the dyeable groups of the aforementioned surface modification groups (such as quaternary amine salt groups and/or montmorillonite, etc.). In these examples, the polypropylene grafted with maleic anhydride groups can form a modified layer and coat the surface of the inorganic material, so the dispersibility of the inorganic material in the polyolefin can be improved.

In some embodiments, the graft ratio of the side chain modifying groups may be 0.1% to 15%. When the graft ratio of the side chain modified group is within the aforementioned range, the appropriate content of the side chain modified group can more effectively disperse the inorganic material in the polyolefin substrate, and the appropriate content of the side chain modified group can more effectively disperse the inorganic material in the polyolefin substrate The group can take into account the mechanical properties and dyeability properties of the obtained dyeable polyolefin fibers at the same time.

For example, the modified polyolefin of the present invention may comprise polypropylene grafted maleic anhydride, and based on the usage amount of the modified polyolefin being 100 weight percent, the usage amount of polypropylene grafted maleic anhydride may be 50 weight percent to 80 weight percent, and preferably 55 to 70 weight percent. When the amount of polypropylene grafted maleic anhydride used is within the aforementioned range, the appropriate content of polypropylene grafted maleic anhydride can make the dyeable polyolefin fibers obtained by spinning have both good dyeability and mechanical properties. .

Based on the usage amount of the dyeable polyolefin composition being 100 weight percent, the usage amount of the modified polyolefin may be 0.05 weight percent to 10 weight percent, and preferably 2 weight percent to 6 weight percent.

If the amount of modified polyolefin used is less than 0.05% by weight, the dispersing effect of the modified polyolefin on inorganic materials is not obvious, and the dyeing effect of the dyeable polyolefin composition cannot be effectively improved. If the amount of modified polyolefin used is more than 20 weight percent, too much modified polyolefin will reduce the mechanical properties of dyeable polyolefin fibers obtained by spinning.

In some application examples, the dyeable polyolefin composition of the present invention can be used to make dyeable polyolefin fibers. Wherein, the aforementioned dyeable polyolefin composition is first kneaded, so as to uniformly mix the dyeable polyolefin composition by the high temperature and the shear force exerted by the screw to obtain a molten kneaded material. Then, after cooling by extrusion, dyeable polyolefin particles can be produced. Then, after melting the dyeable polyolefin particles and further performing a spinning process, the dyeable polyolefin fiber of the present invention can be obtained. It can be understood that when the polyolefin in the dyeable polyolefin composition is polypropylene, the obtained dyeable polyolefin fibers are dyeable polypropylene fibers.

During kneading, the modified polyolefin helps to uniformly disperse the inorganic material in the polyolefin base material and reduce the crystallinity of the polyolefin base material, so the dyeable polyolefin fiber obtained in the subsequent spinning process Among them, the low crystallinity polyolefin base material and the inorganic material uniformly dispersed therein help to make the dye molecules adsorbed by the fibers, thus improving the dyeability of the dyeable polyolefin fibers.

Secondly, by selecting the polymerization monomer of the first polymer in the polyolefin, the polyolefin substrate can have lower crystallinity and good dyeability, which is helpful to further improve the dyeable polymer obtained. Dyeable properties of olefin compositions.

In addition, when additionally adding the second polymer and/or the heterostructured polypropylene to the polyolefin, the second polymer and the heterostructured polypropylene can effectively reduce the crystallinity of the polyolefin substrate and help to improve the dyeability of the obtained product Dyeable properties of polyolefin compositions.

The following examples are used to illustrate the application of the present invention, but it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention.

Preparation of dyeable polyolefin fibers

Example 1

The polypropylene substrate of the dyeable polyolefin composition of Example 1 may comprise 95 wt% of homopolypropylene and 5 wt% of heteroarranged polypropylene. Secondly, the dyeable polyolefin composition of Example 1 may comprise 92.5 wt% of the aforementioned polypropylene substrate, 3 wt% of montmorillonite and 4.5 wt% of polypropylene grafted maleic anhydride (PP-g-MA ), in which montmorillonite is modified with quaternary amine salt.

After kneading the aforementioned dyeable polyolefin composition, the dyeable kneaded product of Example 1 can be obtained. Among them, the crystallinity of the kneaded polyolefin base material is 43%. Then, the dyeable compound is spun to obtain the dyeable polyolefin fiber of Example 1. The obtained dyeable polyolefin fibers were evaluated by the following evaluation methods for dyeability and mechanical properties, and the results are shown in Table 1, which will not be repeated here.

Example 2 and Example 3 and Comparative Example 1 and Comparative Example 2

The dyeable polyolefin fibers of Examples 2 to 3 and Comparative Examples 1 and 2 use the same process steps as the production method of the dyeable polyolefin fibers of Example 1, except that Examples 2 and 2 Example 3, Comparative Example 1 and Comparative Example 2 are to change the composition and usage amount of the polypropylene base material in the dyeable polyolefin composition.

Evaluation method

dyeability

The dyeability of the dyeable polyolefin fibers of Examples 1 to 3 and Comparative Examples 1 and 2 is that the fibers are first put into the dye solution, and heated to 70 ° C at a speed of 2 ° C/min, and then 1 Heat to 130°C or 100°C at a rate of °C/min. After holding the temperature at 130°C or 100°C for 60 minutes, the fiber was taken out after the temperature was lowered to 60°C. Wherein, the dye liquor formulation contains 1.5 wt% owf of rubine S-2G and 1.0 g/L of powder, the liquor ratio of the dye liquor formula is 1:30, and the pH is 4.0.

Next, the dyed fibers were put into a reduction lotion (the formulation will be described later), and the temperature was raised to 80°C. After holding the temperature for 20 minutes, the fibers were taken out, and the apparent concentration (K/S) of the fibers after reduction and washing was measured by a spectrometer. The reducing wash solution contained 4 g/L of Na ₂ S ₂ O ₄ and 3 g/L of NaOH, and the liquor ratio was 1:30. Among them, the higher the apparent concentration (K/S) value, the better the dyeability of the fiber, and the measurement results are shown in Table 1.

mechanical properties

The evaluation method of mechanical properties is to measure the elongation of the fiber made by general commercially available polypropylene (manufacturing company is Jiaji Plastic & Chemical Co., Ltd.) and the polyolefin fiber of Comparative Example 1 by a tensile testing machine. and fiber strength. The fiber obtained from commercially available polypropylene had an elongation of 101%, a fiber tenacity of 3.6 g/den, and a total denier of 40.4 d/15f. The polyolefin fiber of Comparative Example 1 had an elongation of 85%, a fiber strength of 3.4 g/den, and a total denier of 46.2 d/15f.

According to Examples 1 to 3 and Comparative Example 1 and Comparative Example 2 in Table 1, when the polypropylene base material of the dyeable polyolefin composition contains hetero-existing polypropylene, the dyeable poly Olefin fibers have good dyeability. Among them, when the crystallinity of the polypropylene base material is 35% to 45%, the obtained dyeable polyolefin fiber has better dyeability. In addition, according to the measurement results of mechanical properties, the added inorganic material does not affect the strength of the obtained fiber, and can still meet the application requirements.

According to the above-mentioned evaluation method of dyeability, compared with the dyeing condition of 130°C, the low crystallinity helps to increase the dyeing depth of the obtained dyeable polyolefin fibers when dyeing at 100°C. In other words, it is easier for the dye to penetrate into the interior of the fiber. Accordingly, compared with the high temperature condition of 130°C, a dyeing temperature of 100°C can achieve a comparable dyeing effect.

According to the above description, the dyeable polyolefin composition of the present invention has good dyeability, and after kneading and spinning, the obtained dyeable polyolefin fiber has good dyeability and mechanical properties. Secondly, the obtained dyeable polyolefin fibers have good color fastness and can meet the requirements of back-end applications.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the appended patent application.

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Claims (10)

A dyeable polyolefin composition comprising: Polyolefin, comprising a first polymer, wherein the first polymer is polymerized from a mixture, and the mixture at least contains propylene, and a crystallinity of the polyolefin is 20% to 90%; An inorganic material having a surface modification group, wherein the surface modification group includes an anchor group and/or a dyeable group; and The modified polyolefin has a main chain structure and a side chain modified group, wherein the main chain structure is polymerized by a reactant, the reactant contains propylene, and the side chain modified group contains horse lehenic anhydride group, and Based on the usage amount of the dyeable polyolefin composition being 100 weight percent, the content of the polyolefin is 70 weight percent to 99.9 weight percent, the content of the inorganic material is 0.05 weight percent to 10 weight percent, and the modified polyolefin The content is 0.05 weight percent to 20 weight percent. The dyeable polyolefin composition of claim 1, wherein the mixture further comprises ethylene, butene, hexene and/or octene. The dyeable polyolefin composition according to claim 2, wherein the polyolefin further comprises a second polymer, and the second polymer comprises an ethylene propylene rubber material and/or a polyolefin elastomer. The dyeable polyolefin composition of claim 1, wherein the polyolefin further comprises a second polymer, and the second polymer comprises atactic polypropylene. The dyeable polyolefin composition according to claim 4, wherein based on the usage amount of the polyolefin being 100% by weight, the content of the hetero-ordered polypropylene is 0% by weight to 20% by weight. The dyeable polyolefin composition of claim 1, wherein the surface modification group comprises a quaternary amine salt group. The dyeable polyolefin composition according to claim 1, wherein the graft ratio of the side chain modified group is 0.1% to 15%. The dyeable polyolefin composition according to claim 1, wherein the modified polyolefin comprises polypropylene grafted maleic anhydride, and based on the usage amount of the modified polyolefin is 100 weight percent, the polypropylene grafted horse The content of lyric anhydride is 55 to 75 weight percent. A method for producing dyeable polyolefin fibers, comprising: Kneading the dyeable polyolefin composition as described in any one of claims 1 to 8 of the claimed scope to form a compound, wherein a degree of crystallinity of the polyolefin of the compound is 20% to 90% %;as well as The dyeable polyolefin fiber can be obtained by spinning the kneaded product. A dyeable polyolefin fiber is prepared by the manufacturing method as described in item 9 of the patent application scope.