KR20140120005A - Master polymer capable of controlling temperature and process thereof and conjugate fiber using therefor - Google Patents

Abstract

The present invention provides a temperature control type polymer master batch, a method for preparing the same, and a composite fiber using the same, wherein the master batch comprises a substrate polymer and a phase change material, the substrate polymer including: a first substrate polymer which is a polyolefin based material having a melting index value of 1 to 100; and a second substrate component composed of an ingredient for enhancing the interfacial adhesive strength when the composite fiber is prepared.

Description

TECHNICAL FIELD [0001] The present invention relates to a temperature control type polymer masterbatch, a method for producing the same, and a composite fiber using the same. More particularly,

The present invention relates to a temperature-controlled polymer masterbatch, a method for producing the same, and a composite fiber using the same, and more particularly, to a temperature-controlled polymer masterbatch in which interfacial adhesion is improved in a composite fiber, a method for producing the same, and a composite fiber using the same.

Generally, when there is a large difference in viscosity between two materials to be kneaded, conventional kneading machines and kneading methods have been technically difficult to uniformly knead. In the material used in the present invention, the phase-change material having a low viscosity is to be uniformly melted and kneaded with the high-viscosity substrate polymer. Since the viscosity difference between them is very large, a technical kneading machine and a kneading machine And there is a technical problem that such a non-uniformly kneaded phase change material is thermally decomposed or thermally deformed during a high-temperature composite spinning process and ejected or carbonized into a gaseous phase to lower radioactivity.

In order to solve the above problems, US Pat. No. 6,793,856 discloses a technique for producing a phase-change polymer masterbatch capable of melt-spinning, in which a phase-change material having a low viscosity is made of a microcapsule- A phase change material is produced and directly melted and kneaded in a high-viscosity substrate polymer, or a melt-kneading process is performed by melt-kneading with a substrate polymer in advance by preliminarily melt- A method of melting and kneading a phase change material directly on a substrate polymer has been disclosed. However, even when the melt-kneading using the microcapsulated phase change material and the special kneading method using the multistage method as described above are used, there is a high possibility that the microcapsule is damaged and broken by the strong shearing force during the melt-kneading, The microcapsules containing the phase change material still undergo re-agglomeration during the spinning process, resulting in the formation of large particles, which are filtered by the spin pack filter, resulting in an increase in the spinning pressure, which leads to a problem of lowering the spinning fairness, Partly due to the large difference in the specific surface area in contact with the phosphorus-phase change material and the substrate polymer in the form of pellets, some of them are kneaded with the matrix polymer, but a significant amount is caused to flow unevenly .

Korean Patent Laid-Open Publication No. 2004-0099652 discloses a method of producing a thermosensitive yarn by adding a microcapsulated phase change material during melt spinning. However, in this technique, the average particle size of microcapsules And it is necessary to add a dispersing agent to prevent re-agglomeration of these particles. In addition, since the nozzle clogging due to large aggregated particles occurs during the melt spinning process, it is necessary to clean the bottom surface of the nozzle frequently. There was a problem in productivity.

In addition, due to the inclusion of the phase change material, the interfacial bonding force between the sheath portion and the core portion in the composite fiber structure of the cis-core structure is weakened and a phenomenon that the interfacial force between the sheath portion and the core portion is separated between the interface of the core- sheath as shown in FIG. Therefore, there is a demand for a polymer masterbatch in which the interfacial peeling phenomenon does not occur even when it is made of a composite fiber containing a phase change material, and a composite fiber capable of being produced thereby.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a temperature controlled polymer masterbatch in which interfacial voids are removed from a conjugate fiber, and a method for producing the same, and a composite fiber using the same.

It is another object of the present invention to provide a temperature-controlled polymer masterbatch in which the loss of phase-change material is minimized to increase the latent heat value, a method for producing the same, and a composite fiber using the same.

In order to solve the above problems, the present invention provides a temperature controlled polymer masterbatch, wherein the masterbatch comprises a base polymer and a phase change material, and the base polymer is a polyolefin-based first base polymer having a melt index value of 1 to 100 And a second base component composed of a component capable of enhancing the adhesion between the interface at the time of manufacturing the composite fiber.

The present invention also provides a temperature controlled polymer masterbatch wherein said second substrate component is a component derived from a carboxyl group or a hydroxyl group.

The present invention also provides a temperature-controlled polymer masterbatch wherein said second substrate component is selected from the group consisting of a polyethylene-vinyl acetate copolymer, a polyethylene-maleic acid copolymer and a polypropylene-maleic acid copolymer.

The present invention also provides a temperature-controlled polymer masterbatch wherein the first base polymer is formed in a range of 35 to 70 wt% in the total composition of the master batch and 5 to 50 wt% in the second base component.

In the present invention, the phase-change material may be a hydrocarbon-based or a non-hydrocarbon-based material, and the hydrocarbon-based material may be a material having 16 to 22 carbon atoms and a paraffinic hydrocarbon. Examples of the non-hydrocarbon based material include polyhydric alcohol- NPG, lactic acid, and fatty acids.

The present invention also provides a temperature controlled polymer masterbatch wherein the content of the phase change material is 20 to 30 wt% in the total composition.

The present invention also provides a method for producing a temperature controlled polymer masterbatch, wherein the masterbatch comprises a base polymer and a phase change material, and the base polymer is a polyolefin based first base polymer having a melt index value of 1 to 100 or less Mixing a first base polymer and a second base component into a hopper of a biaxial melt kneader and melting and kneading the same; Feeding the phase change material to a liquid phase feed device at a middle portion of a melt kneader; And cooling and cutting the uniformly kneaded mixture in the melt kneading process under a wet process. The present invention also provides a method for producing a temperature controlled polymer master batch.

The present invention also provides a method for producing a temperature controlled polymer masterbatch wherein the second base component is a component derived from a carboxyl group or a hydroxyl group.

The present invention also provides a process for preparing a temperature controlled polymer masterbatch wherein the second base component is at least one selected from the group consisting of a polyethylene-vinyl acetate copolymer, a polyethylene-maleic acid copolymer and a polypropylene-maleic acid copolymer.

Further, the present invention provides a method for producing a temperature-controlled polymer masterbatch wherein the first base polymer is formed in a range of 35 to 70 wt% in the total composition of the master batch and 5 to 50 wt% in the second base component.

The present invention also provides a process for preparing a temperature controlled polymer masterbatch wherein the content of the phase change material is 20 to 30% by weight of the total composition.

Also, the present invention provides the above-mentioned polymer composite or the Cisco-type composite fiber produced by the above-mentioned method, wherein the polymer composite is prepared as a core component.

The present invention is advantageous in that the masterbatch containing the phase change material contains a substance capable of enhancing the interfacial adhesion of the conjugate fibers, thereby reducing the defect rate and eliminating interstitial pores of the conjugate fibers and increasing the strength of the conjugate fibers have.

Further, according to the present invention, the process of crystallization under quenching conditions is adopted. As a result, the master batch is excellent in shape and the loss of the phase change material in the process is minimized, thereby improving latent heat characteristics.

1 is a cross-sectional photograph of a composite fiber according to Comparative Example 2. Fig.
2 is a cross-sectional photograph of the composite fiber produced according to the preferred embodiment 6 of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts have the same reference numerals as much as possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

The terms "about "," substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

The polymer masterbatch according to the present invention may be a mixture of a base polymer and a phase change material (PCM). The base polymer may be a polyolefin-based polymer having a melt index of 1 to 100 or less, and may be a polyolefin-based polymer as a first base polymer and a second base component, ≪ / RTI > The second base component may be a component derived from a carboxyl group or a hydroxyl group copolymerized with an olefinic group, and examples thereof include but are not limited to polyethylene-vinyl acetate copolymer, polyethylene-maleic acid copolymer, polypropylene-maleic acid copolymer . The first base polymer may be formed in the range of 35 to 70 wt% in the total composition of the master batch and 5 to 50 wt% in the second base component. When the first base polymer is less than the above range, for example, when the master batch is used as the conjugate fiber, there is a problem in the morphological stability of the filament. When the first base polymer is in the above range, the content of the second base component and the phase- And the suppression of interfacial separation phenomenon and the occurrence of latent heat condition are small.

The phase-change material may include a hydrocarbon-based or a non-hydrocarbon-based material. The hydrocarbon-based material may be a material having a paraffinic hydrocarbon having from 16 to 22 carbon atoms. The non-hydrocarbon-based material may be a polyhydric alcohol- NPG, lactic acid, fatty acid, and the like. The content is preferably 20 to 30% by weight in the whole composition. If the amount is less than the above range, there is a problem that the latent heat effect is lowered. If it exceeds the above range, a problem may arise in the form stability when the filament is manufactured.

The polymer masterbatch is produced by first feeding a first base polymer and a second base component into a hopper of a biaxial melt kneader, melting and kneading the mixture, feeding the phase change material to a middle portion of the melt kneader through a liquid injector, So that they can be uniformly kneaded in the kneading process. After the above melt-kneading, it can be produced by underwater cutting (UWC) under a wet process. When the cooling cut is performed, rapid quenching of the kneaded polymer may be caused. This means that the spherical shape can be maintained in the shape implementation of the master batch and there is an advantage that the problem of forming the spherical tail can be overcome. In addition, the latent heat value is improved as a master batch including a phase change material.

Hereinafter, the present invention will be described by way of examples.

Example 1

Polypropylene having a molecular weight of 10,000 or less and polypropylene having a molecular weight of 52,000 as a second base component were uniformly mixed in a ratio of 65/5 weight%, respectively, and then a biaxial melt The mixture was firstly melted and kneaded, and 30% by weight of octadecane, which is a phase change material, was added into a molten state by inserting a liquid phase injector into the middle of the melting and kneading machine, followed by secondary melting and kneading, A polymer masterbatch containing a phase change material was prepared by underwater cutting. The kneader temperature was maintained at 180 to 220 degrees Celsius and was produced at a rate of 50 kg per hour. (Underwater cutting method)

Example 2

The same as Example 1, except that the content of polypropylene and polypropylene-maleic acid copolymer was 55/15 wt%.

Example 3

The same as Example 1, except that the content of the polypropylene and the polypropylene-maleic acid copolymer was 45/25 wt%.

Example 4

The content of the polypropylene and the polypropylene-maleic acid copolymer was 35/35 wt%.

Example 5

The same procedure was repeated with the same composition ratio as in Example 1 using polyethylene-vinyl-acetate having a melt index value of 25 instead of polypropylene-maleic acid copolymer.

division Polypropylene Maleic acid copolymer Polyethylene vinyl acetate Phase change material Example 1 65 5 30 Example 2 55 15 30 Example 3 45 25 30 Example 4 35 35 30 Example 5 65 5 30

Comparative Example 1

The polypropylene having a molecular weight of 10,000 or less and the polypropylene-maleic acid copolymer having a molecular weight of 52,000 were uniformly mixed at 65/5 wt%, respectively, and then charged into a biaxial melt kneader hopper to obtain a first melt- And octadecane, which is a phase change material, was added in a molten state by inserting a liquid phase injector into a molten kneading machine stopper portion at 30 wt% based on the weight of the base polymer / adhesion promoter, and then subjected to secondary melting and kneading. A polymer masterbatch containing a phase change material was prepared by cooling in a 30 cm long rectangular water bath and then dewatering and cutting at 3 mm intervals (Strand cutting). The kneader temperature was maintained between 180 and 220 degrees Celsius and was produced at a rate of 50 kg per hour. (Strand cutting method)

division Furtherance Cutting method M / B
shape Latent heat
(J / g) Polypro
Filen Polypropylene-maleic acid copolymer Polyethylene-vinyl-acetate Octadecane Example 1 65 5 - 30 U.W.C Good 41.77 Example 2 55 15 - 30 U.W.C Good 43.67 Example 3 45 25 - 30 U.W.C Good 37.9 Example 4 35 35 - 30 U.W.C Good 33.7 Example 5 65 - 5 30 U.W.C Good 45.83 Comparative Example 1 65 5 - 30 S.C Bad 17.45

* Under water cutting method (U.W.C)

* Strand cutting method (S.C)

* Good: When the spherical phase is retained by visual observation

* Poor: When a tail is formed in the spherical shape by visual observation

Example 6

The polymer masterbatch containing the phase change material prepared in Example 1 was used as a core component and nylon 6 was used as a sheath component so that the sheath / core component ratio was 50/50 wt% Composite radiation. The spinning temperature of the composite spinning was controlled to 240 ° C and the spinning temperature of the core was 200 ° C.

Example 7

The same procedure as in Example 6 is repeated except that the ratio of cis / core is 40/60 wt%.

Example 8

The same procedure as in Example 6 was repeated using the polymer masterbatch containing the phase change material prepared in Example 5 as a core component.

Example 9

The same procedure as in Example 8 is repeated except that the ratio of cis / core is 40/60 wt%.

Comparative Example 2

The same procedure as in Example 6 was made as a masterbatch prepared by the Strand cutting method.

Example 3

The same procedure as in Example 7 was carried out except that the masterbatch prepared by the Strand cutting method was used.

division core
(weight%) Composition (% by weight) Latent heat of yarn (J / g) Polypropylene Polypropylene-maleic acid copolymer Polyethylene-vinyl-acetate Octadecane Example 6 50 65 5 - 30 14.12 Example 7 60 65 5 - 30 17.45 Example 8 50 65 - 5 30 13.58 Example 9 60 65 - 5 30 17.52 Comparative Example 2 50 65 5 - 30 4.14 Comparative Example 3 60 65 5 - 30 7.08

Example  10

The composite fibers prepared in Example 6 were woven, compressed at 200 ° C for 5 minutes, and then cooled to a size of 2.5 cm and 10 cm, respectively. The tensile strength was measured by a tensile tester.

Comparative Example 4

The composite fibers prepared by the method of Comparative Example 2 were tested under the same conditions as in Example 10. [

The test results are shown in Table 4 below.

division Tensile Testing Machine (kgf) Example 10 0.48 0.55 Comparative Example 4 0.30 0.38

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

Claims (12)

In the temperature-controlled polymer masterbatch,
Wherein the masterbatch comprises a base polymer and a phase change material,
The base polymer is a polyolefin-based first base polymer having a melt index of 1 to 100 or less,
A polymer masterbatch comprising a second substrate component comprising a component capable of enhancing adhesion between the interfaces during manufacture of the composite fiber.
The method according to claim 1,
Wherein the second substrate component is a component derived from a carboxyl group or a hydroxyl group.
The method according to claim 1,
Wherein the second substrate component is at least one selected from the group consisting of a polyethylene-vinyl acetate copolymer, a polyethylene-maleic acid copolymer, and a polypropylene-maleic acid copolymer.
The method according to claim 1,
Wherein the first base polymer is formed in a range of 35 to 70 wt% in the total composition of the master batch and 5 to 50 wt% in the second base component.
The method according to claim 1,
The phase-change material may be a hydrocarbon-based or a non-hydrocarbon-based material, and the hydrocarbon-based material may be a material having 16 to 22 carbon atoms and a paraffinic hydrocarbon. Examples of the non-hydrocarbon-based material include a polyhydric alcohol system such as PEG or NPG, Temperature controlled polymer masterbatch which is a fatty acid.
The method according to claim 1,
Wherein the content of the phase change material is 20 to 30% by weight of the total composition.
In a method for producing a temperature controlled polymer masterbatch,
The master batch comprises a base polymer and a phase change material, and the base polymer is a polyolefin-based first polymer having a melt index of 1 to 100 or less and a component capable of enhancing adhesion between the interface A second substrate component,
Introducing the first base polymer and the second base component into a hopper of a biaxial melt kneader and melting and kneading the same;
Feeding the phase change material to a liquid phase feed device at a middle portion of a melt kneader; And
And cooling and cutting the uniformly kneaded mixture under the wet process in the melt kneading process.
8. The method of claim 7,
Wherein the second base component is a component derived from a carboxyl group or a hydroxyl group.
8. The method of claim 7,
Wherein the second base component is at least one selected from the group consisting of a polyethylene-vinyl acetate copolymer, a polyethylene-maleic acid copolymer, and a polypropylene-maleic acid copolymer.
8. The method of claim 7,
Wherein the first base polymer is formed in a range of 35 to 70 wt% in the total composition of the master batch and 5 to 35 wt% in the second base component.
8. The method of claim 7,
Wherein the content of the phase change material is 20 to 30% by weight of the total composition.
A cisco compound conjugated fiber produced by the polymer arrangement according to any one of claims 1 to 6 or the polymer arrangement prepared by any one of claims 7 to 11 as a core component.

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