KR880000493B1 - Making method of two compound fiber and it's spinnerette - Google Patents

Abstract

In the composite fibre, the island component has a viscosity in the range of 2,500-3,500 poise while the matrix component has a viscosity in the rage of 1,500-2,500 poise, and the diference of viscosity between the two components is arranged to be 2.0 viscosity of island component 1.2. The melt composite of the two components is repeatedly processed through the steps of convergingdispersing- distributing to be finally spun for the compsite fibre. The two components are arranged not to be dissolvable with each other or joining together.

Description

Method for manufacturing two-component islands-in-the-sea composite fiber and its detention apparatus

1 is an enlarged cross-sectional view of the detention apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1,1 ': detention plate 2,2': distribution board

3,3 ': Dispersion plate 4,4': Focusing plate

5: Distribution plate 6: 5 soluble component flow path of distribution plate

7: flow path of fiber-forming component of distribution plate 5: soluble component outlet of distribution plate 5

9 Outflow hole of the fiber-forming component of distribution plate 5 10 Lower tube of distribution plate 5

11: focusing part of the focusing plate 4 12: outflow hole of the focusing plate 4

13: flow path of the distribution plate 3 14 flow path of the distribution plate 2

15: Outflow hole of the distribution plate 2 16: Focusing portion of the focusing plate 4 '

17: Outflow hole of the focusing plate 4 '18: Flow path of the dispersion plate 3'

19: flow path of distribution plate 2 '20: outflow hole of distribution plate 2'

21: focusing part of the detention plate 1 22: outflow hole of the detention plate 1

23, 24: 1 'focusing section 25: 1' focusing slope.

The present invention relates to a method for producing a bicomponent islands-in-the-sea composite fiber having a large number of islands of water and micronized island fineness and excellent spinning property in the fiber cross section, and a device for detaining the same.

Of the two-component composite fibers, sea and island composite fibers are formed into ultra-fine filaments when sea components in the fiber are removed. It has the characteristic of having a soft touch and appearance, and suitable use development has been made depending on the fineness and frequency of the island.

However, the existing islands-in-sea composite fiber has a limitation in commercialization because the structure and frequency of islands in the fiber are limited, and it is difficult to reduce the sea component ratio when the degree is increased. However, there is a limit to increase the frequency due to the constraints of the device in the case of uneven structure between the fibers to increase the unevenness between fibers and uniformity of the fineness of the island.

∼

데니어, 도수는 500∼3000개 되는 초극세피브릴 집속섬유를 제조할 수 있는 제조방법과 그 구금장치를 예의 검토하여 본 발명을 완성하였다.Therefore, the inventors of the present invention provide that the structure of the in-fiber cross-sectional shape is uniformly controlled in a range where the sea component ratio is 35% or less, and the fineness of the island is

To

Denier and DH completed the present invention by diligently studying a manufacturing method and a detaining device capable of producing 500 to 3000 ultra-fine fibrillated focused fibers.

The present invention is a molten spinning of a soluble component having a Reynolds number of 1,300 or less, and a fibrous polymer-type polymer resin having a Reynolds number of 1,300 or less. Using the polymer resin as a matrix, the two-component composite molten polymer, which is primarily distributed in a matrix phase, is concentrated in the liquid phase, and then dispersed-distributed-condensation is repeated. More specifically described as a method and a detention apparatus for spinning through the pore as follows.

The detention apparatus of the present invention has a distribution plate 5, a focusing plate 4, a distribution plate 3, a distribution plate 2, a focusing plate 4 ', and a distribution plate 3' as shown in FIG. It consists of a distribution plate 2'-detaining plate 1, and each plate is closely contacted in parallel and vertically.

The fiber-forming component on the island and the soluble component on the matrix are each melted in separate injection molding machines and supplied into the pack according to the degree of supply of the metering pump.

The two kinds of polymer melts, which are separately supplied, are separately supplied to respective component flow paths of the distribution plate 5 by the distributing action of two or more separate distribution plates having a split-like flow path at the top of the distribution plate 5.

Soluble components and fibrous components are alternately arranged in the concentric direction on the upper plate of the distribution plate 5, and the soluble components in the flow path 6 are transferred to the lower plate of the distribution plate 5 through the outlet hole 8 and focused. It flows into the upper plate focusing part 11 of the plate 4.

The fiber-forming component of the flow path 7 is formed in a uniform shape on the focusing portion 11 of the top plate of the focusing plate 4 through the outflow hole 9 protruding from the lower plate of the distribution plate 5.

The shape and arrangement of the outlet holes 9 for separating the fibrous component into phases is a very important factor for forming a uniform phase, and the planar structure of the outlet holes 9 in the flow path 7 has five rows of concentric circles. The outflow holes between adjacent heats were zigzag.

The purpose of this is to ensure uniform distribution of the soluble components in the lower plate of the distribution plate and to prevent abnormal retention and to eliminate cross-sectional instability of the island and deterioration of the molten polymer liquid.

The fibrous component and matrix soluble component formed on the distribution plate 5 are condensed into the bicomponent composite polymer liquid phase in the converging plate 4, and the bicomponent composite phase structure is uniformly distributed in the matrix phase.

The two-component composite molten polymer liquid formed as one stream in the outlet hole 12 of the focusing plate 4 is slit 14 of the distribution plate 2 by the flow path 13 of the dispersion plate 3. Flows into.

At this time, the stream discharged from the focusing plate 4 should be uniformly supplied to the distribution plate 3 to be equalized to the flow path 14 of the upper plate of the distribution plate 2 through the flow path 13. The structure must be accurate and compact, and it is very important to select two components of the phase and matrix.

Therefore, in the apparatus of the present invention, the outflow hole diameter of the focusing plate 4 is ø0.3-ø1.0, and the two-component composite molten polymer liquid is flown through the dispersion plate 3 without turbulence while regulating the pack internal pressure. 13), and the flow path 13 is positioned directly below the outlet hole 12.

The role of the flow path 13 is to transfer the composite phase flowing out of the outflow hole 12 to the flow path 14, and the length of the flow path 13 is made as short as possible so that there is no turbulence in the transition process, and the diameter is ø1 or more. The shear stress acting on the stream is minimized.

The composite phase flowing out of the flow passage 13 flows into the slit 14, and the outflow hole 15 in the slit 14 is alternately arranged with respect to the flow passage 13, so that the composite phase flowing out of the flow passage 13 It is distributed to left and right by the slit 14.

The diameter was regulated to 0.3-1.0 in order to maximize the strain stress on the stream while allowing the outflow hole 15 in the slit 14 to flow evenly.

The two-component composite phase discharged from the outlet hole 15 is refocused at the focusing unit 16, and the structure is the same as that of the focusing unit 11.

As described above, the function of each plate stabilized the flow of the two-component composite molten polymer solution focused first, and reduced the Reynolds number of the resin in combination with the fibrous resin to suppress the occurrence of turbulence and the internal structure of each plate. And the connection part was completely compacted to prevent abnormal residence during the flow process.

The two-component composite phase focused at the secondary in the focusing plate 4 'is increased by the number of slits 14 in one group of the distribution plate 2 more than the primary composite phase, and is dispersed again. It is distributed through the plate 3'-distribution plate 2 'and discharged through the spinning hole 22 while converging in the concentrating portion 21 of the holding plate 1 in the third order.

Features of the detention apparatus of the present invention as described above

1) can reduce the matrix component taste in the range of 10-35%,

∼

데니어 까지 조절할 수 있으며,2) the fineness of the island

To

Up to denier,

3) It can form hundreds to thousands of islands in the fiber section,

4) The radioactivity is stable, improving the operability,

5) Reproducibility is certain.

However, no matter how accurate and precise the detention apparatus is, if the selection of the components of the image and the matrix is inappropriate, the function of the detention apparatus cannot be utilized.

In practice, a two-component island-in-the-sea type in which the forming component of the fiber-forming component and the matrix-forming component of the soluble component form a two-component molten composite phase in a detention apparatus and repeats the spray-focusing process to form a uniform image in the fiber cross section. In order to become a composite fiber, the physical and chemical properties between the two components are very important.

That is, compatibility between two components, bonding strength, interfacial tension, melt viscosity, melt viscosity difference, component ratio and the like directly affects.

Essentially, the phase and matrix components should be incompatible to prevent mutual chemical reactions during the concentration-dispersion process, and it is advantageous that there is no melt viscosity difference and bonding force in two minutes during the concentration process.

Therefore, the fiber-forming component that is the island-like component may be any of nylon, polyester, and olefin, and is preferably 1300 or less, more preferably a viscosity (η) in the range of 2,500-3,500 poise and matrix. As the phase component, a melt-spinable polymer resin which is completely incompatible with the phase component and has no bonding force, preferably has a Lennol number of 2,000 or less, and preferably has a melt viscosity η within the range of 1,500-2,500 poise.

This suppresses turbulence in the process of focusing in the converging portion of the connection plate 4 into a two-component composite phase, in the process of dispersing in the dispersion plate 3 and in the distribution process of the distribution plate 2, and uniform phase distribution. It is very important to get a complex phase.

In addition, in forming the two-component islands-in-the-sea composite fiber, the most important process is the process of forming a two-component molten composite phase in the focusing plate (4), a factor that directly affects the formation of the phase in this process Is the difference between the component ratio of the phase component and the matrix phase component, the melt viscosity degree of each component, and the melt viscosity thereof.

In general, a component having a large component ratio tends to be a matrix component, but as the η degree / η matrix (η degree: island component melt viscosity, η matrix: matrix component melt viscosity) is larger than 1, the phase component ratio can be increased relatively. .

Therefore, it is advantageous that the η degree is larger than the η matrix, but the larger the η degree / η matrix is than 1, the more unstable the image formation is.

1.4인 것이 적정하다.In the test result of the present invention, when 2.0> η degree / η matrix> 1.2, in order to obtain a stable phase, and to increase the component ratio of the phase more than 60%, 1.7> η degree / η matrix

1.4 is appropriate.

If η degrees / η matrices> 2, the behavior between the two components in the two-component composite melt phase in the focusing plate 11 of the focusing plate 4 becomes impossible for the matrix phase to regulate the appearance deformation capacity of the matrix, thus deforming the phase. As time passes, adjacent phases are joined to each other, resulting in the formation of a phase component and a matrix-like gate in a complex phase.

On the other hand, when the η degree / η matrix <1.2, the formation of the phase is somewhat stable, but the component ratio of the phase cannot be increased, and the dispersion-distribution-concentration is repeated, resulting in the destruction of the phase. There is a problem of uneven appearance.

In the above focusing process, the two components are incompatible with each other and the bonding force and the interfacial tension must be close to "0", but in fact, during the process of dispersion-distribution-refocusing after the first focusing, the increase of the frequency and the isolated phase In order to obtain the compatibility between the two components, the bonding strength, the degree of interfacial tension is a direct factor.

The fact that the two components should be completely incompatible means that in the focusing plate 4, the formed two-component molten composite phase continues to be in a mixed state, so if there is compatibility, a mutual chemical reaction occurs for two minutes, so that the boundary between the two components This is because it is difficult to remove the sea component in the two-component islands-in-the-sea composite yarn because the third component is formed.

In addition, it is possible to reduce the invasion of the island component by the sea component solvent in the sea component solvent treatment only if it is incompatible.

Bonding force and open tension have a direct effect on the process of dispersing the two-component melt composite phase. Therefore, in order to suppress the turbulence of the two-component melt composite liquid and to obtain an independent image in a circular shape rather than a layered structure like onion, It is preferable that this is "0".

When the two-component polymer resin having the above characteristics is applied to the apparatus of the present invention, it is preferable that the soluble component in the matrix reaches the top of the focusing plate 4 for several tens of seconds or several minutes before the fibrous component in the drawing. It is preferable to adjust the volume ratio of the distribution plate and the sand cup on the upper part of the distribution plate 5, since it is advantageous to obtain a stable two-component melt composite liquid in the figure.

When determining the volume ratio of the distribution plate and the sand cup, it is necessary to keep the supply pressure and the outflow pressure of the molten polymer liquid in balance for 2 minutes in consideration of the component ratio of two components and the flow rate. In this case, by adjusting the outlet diameter of the distribution plate directly below the sand cup, it is possible to make the pressure distribution inside the peg uniform.

∼

데니어이고, 섬유 단면내 도상의 수가 500개 이상이면서, 도상의 섬도 범위는 평균섬도 ±200%, 복합사 내의 섬유간 도상수 범위는 평균수도 ±20% 미만인 피브릴 집속형의 해, 도형 복합섬유를 제조하는 구금장치 및 그 제조방법인 것이다.To summarize the contents of the present invention described above, the present invention is one of two kinds of melt-spinable polymer resins having different physical and chemical properties, one component is a fiber-forming component as a island component that can form a phase, the other The component is a soluble component, which can be dissolved in a matrix form, and the two components are separately supplied to a detention apparatus to form a two-component composite melt in a sea island shape first, and then the redispersion process is repeated by repeating the redispersion-concentration process.

To

Denier, fibrillated concentrating solution, figure composite fiber with 500 or more in-fiber cross-sectional shape, average fineness range of ± 200%, and interfiber degree of fiber in composite yarn less than ± 20% It is to be a detention apparatus and a method of manufacturing the same.

In addition, in order to increase the frequency in a fiber cross section, instead of the metal plate 1, the other metal plate 1 'may be closely adhered in parallel with the final distribution board 2'.

In this case, however, the distance from the distribution plate discharge hole 20 to the spin hole of the holding plate 1 'is long in the process of focusing the spinning hole of the holding plate 1', thereby increasing the possibility of forming turbulence, Fineness unevenness increases.

In addition, the design of the focusing unit 23 of the detent plate 1 'should pay close attention to the pro-rate of the two-component composite melt.

Experimental results In the case of using the above two kinds of polymer resin, the inclination angle 25 of the focusing part 23 is most suitable when 7.5 ° -23.5 ° considering the pack volume and the degree of focusing.

As described above, the novel solution of the present invention, the manufacturing apparatus and method of the figure composite fiber is a further development of the existing island-in-the-sea composite yarn manufacturing apparatus, by using a simple device to convert the number of islands in the fiber cross-section conventional Increases more than twice the composite yarn, allowing uniformity of the island's fineness.

The present invention will be described in detail through examples.

Example 1.

The fiber-forming component uses a nylon 6 resin having a relative viscosity of 2.8 measured at 25 ° C. in a 96% sulfuric acid solution, and a polyethylene resin having a MI = 17 compounded with HDPE / LDPE = 4/6 as the soluble component. Using the spinneret, using the same detention apparatus as in FIG.

At this time, the spinning conditions, the nylon discharge amount is 35g / min, PE discharge amount is 20g / min, the spinning flux is 1100m / min, undrawn yarn was 450d / 48 fil.

∼

데니어이고 도상의 수는 약 600개가 독립적으로 형성되었다.The undrawn yarn was drawn three times and 150/48 fil island-like composite yarn was produced.

To

It is denier and the number of phases is about 600 independently.

Example 2.

Under the same conditions as in Example 1, a separate detent plate 1 'is provided in the detention apparatus of FIG. 1 so that the two-component composite melt discharged from the final distribution plate 2' can be collectively concentrated instead of the detention plate 1 '. Attached and spun.

∼

데니어 이고, 도수가 약 400개인 해도형 복합사를 얻었다.At this time, the undrawn yarn is 450d / 30 fil, and the undrawn yarn is drawn three times.

To

A denier and island-in-the-sea composite yarn having a degree of about 400 was obtained.

Claims (4)

Melting point of the island component in the production of two-component islands-in-the-sea composite fiber having fibrous performance and melting-spun polymer resin as island phase component and melt-dissolvable soluble polymer resin as matrix phase component The degree is 2,500-3,500 poise, the melt viscosity of the matrix component is 1,500-2,500 poise, and the difference between the melt viscosity of the two components is 20.>

A method for producing a two-component islands-in-the-sea composite fiber in which a two-component composite melt of> 1.2 is concentrated and then dispersed several times. The method for producing a two-component islands-in-the-sea composite fiber according to claim 1, wherein the island component and the matrix component have no compatibility, melt viscosity difference, and bonding strength in the positive portion. Distributing the fibrous performance components in phase and focusing them in a two-component molten composite phase sequentially in the lower part of the distribution plate in which the soluble components are embedded in a matrix between the phases, the dispersion plate for dispersing them and redistributing them Detaining device for two-component islands-in-the-sea composite fiber made by applying a detaining plate after adhering in the order of distribution plate. The method of manufacturing a two-component islands-in-the-sea composite fiber according to claim 2, wherein the binding of the focusing plate-distribution plate-distribution plate is repeatedly performed twice to five times.

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