JPH024695B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides novel elastic fibers, aggregates thereof, and
Concerning the manufacturing method. More specifically, it is composed of two or more thermoplastic polymers.
A novel elastic fiber with improved elastic properties
related to fibers, their aggregates, and their manufacturing methods. Conventionally, polyester has been used as a fiber with excellent elastic recovery rate.
A so-called spa made of urethane elastomer
index or polyester elastomer
Elastic thread used as a material is known. However, polyurethane elastomers
Or, like polyester elastomer,
Elastic fibers that exhibit elasticity through a P-elastic mechanism are
The initial elastic modulus is extremely small, creating a so-called rubbery wind.
It has a tendency to block and is particularly susceptible to blocking.
Elastic recovery and elongation when used at pure temperature
The disadvantage is that the value decreases rapidly. Also, these
Entropy elastic fibers are blocked as described above.
Because it is easy to spin, it does not have spinnability. On the other hand, as an elastic fiber with a high initial elastic modulus,
Lipivalolactone fiber (Special Publication No. 41-9810, Special Publication
(Refer to No. 1972-25950, Special Publication No. 7748), Po
Ribten-1 fiber (see Japanese Patent Publication No. 55-11761)
), nylon-6 fiber (Special Publication No. 55-17133)
), polyoxymethylene fiber (Special Publication Act 1977-
(see Publication No. 8982), and polypropylene fibers
(Refer to Special Publication No. 39-22685, Special Publication No. 39-26148)
It has been known. However, all of these fibers cannot be melt spun.
The undrawn yarn produced by spinning the yarn as it is or with a low
After stretching at the stretching ratio, dry heat or moist heat for a long time
Manufactured by processing or pressure treatment
It is extremely low productivity as it can be manufactured by
It is simply manufactured by a method. These elastic fibers have the above-mentioned entropy elasticity machine
Fiber that exhibits elasticity due to crystalline elasticity mechanism
And since the initial elastic modulus is extremely high,
So-called “hard elastic fiber” (hereinafter referred to as “hard elastic fiber”)
(sometimes abbreviated as HEF) [J.
Macromol.Sci-Phys.B8(1-2), 157(1973)
reference〕. However, these crystalline elastic fibers
Unlike entropic elastic fibers, it remains constant even at low temperatures.
Excellent in maintaining elastic properties at high temperatures.
However, because the initial elastic modulus is too high and the elongation is low, e.g.
For example, it can be used as elastic fiber for clothing.
do not have. As far as the inventor knows, the entropy as described above
Wide range of applications, located between elastic fibers and HEF
Elastic properties that can be used for particularly excellent elastic recovery
Not only has a moderate initial elastic modulus and a moderate
Elastic fibers with an elongation of
stomach. Therefore, the object of the present invention is to
New with improved elastic properties consisting of polymers
The objective is to provide elastic fibers that are of high quality. Another object of the invention is to have a moderate initial modulus and a moderate
To provide a new elastic fiber with an elongation of
be. Still another object of the present invention is to provide excellent elastic recovery rate.
The object of the present invention is to provide a novel elastic fiber having the following properties. Still another object of the present invention is to reduce blocking property.
Provides a new elastic fiber with excellent structure and texture
There is a particular thing. Still another object of the present invention is to have excellent spinnability and to
To provide a new elastic fiber useful as a material for
It's there. Still another object of the present invention is to provide excellent performance even at low temperatures.
To provide a novel elastic fiber exhibiting elastic properties.
It is in. Still another object of the present invention is to achieve the above-mentioned improvements.
A fiber aggregate consisting of elastic fibers with elastic properties is
It is about providing. Still another object of the present invention is to provide two or more types of thermoplastic
Polymers with improved elastic properties such as those mentioned above
Provides a method for producing elastic fibers or aggregates thereof.
It's about doing. Still another object of the present invention is to provide two or more types of thermoplastic
For heat treatment of melt spinning and undrawn fibers from polymers
Improved elastic properties such as those mentioned above can be achieved with higher productivity.
To provide elastic fibers or aggregates thereof having
It's there. Further objects and advantages of the present invention are described below.
It will become clear from this. Such objects and advantages of the present invention are realized by the present invention.
(a) elastic fibers made of two or more thermoplastic polymers;
(b) at least one of the thermoplastic polymers is wax-based;
Connections that can form tractures (Row structures)
(c) at least one other component of the thermoplastic polymer is lame;
It has crystallinity that can form crystals.
(d) the elastic fiber has a wax structure;
It has improved elastic properties characterized by
This is achieved by the above elastic fibers. Conventionally, elastic materials made of two or more types of thermoplastic polymers
Fibers are unknown as mentioned above. thermoplastic heavy
Combination is a row structure
Polymers with crystallinity that can form
consisting of propylene or polyoxymethylene
Elastic fibers are made by folding polymer molecular chains.
Low struct in which lamellar crystals are deposited in the C-axis direction
It is known to have a chia (J.
Macromol.Sci−Phys. B1 41 1967 and J.
Macromol.Sci−Phys. B5 591 1971).
Elastic fibers with such a low structure
The fibers are shown schematically by Clark et al. (ES
Clark, CA Garber, Int. J. Polymeric
Materials, 1 31 (1971)), lame
Taimolekyur present between lamellae or lamellar bundles
The lamella or lamella bundle opens using the cross-linking point.
A crystalline elastic fiber that exhibits elasticity through a similar mechanism.
It is believed that Therefore, the polymerization that gives such crystalline elastic fibers
Mixing other polymers with the body will result in lamellar crystals.
In turn, it may prevent the formation of row structures.
considered undesirable to give elastic fibers
It seems that this has been thought of. However, surprisingly this time, more than two species
Elastic fibers made of thermoplastic polymers
Forms wax structure as a plastic polymer
Using a polymer with crystallinity that can
The crystallinity that allows the formation of lamellar crystals as a plastic polymer
By using a polymer with
Rather than hindering the formation of the
Promotes tracture formation and improves elastic properties
It is an object of the present invention to provide the elastic fiber of the present invention having
This was revealed by Akishin et al. The present invention will be explained in detail below. The elastic fiber of the present invention can be used for any kind of melt spinning.
It can also be produced by using spinning equipment that
Can be done. For example, the commonly used spinning method
Thermoplastic polymerization of two or more types from one orifice
Mixed or melt extruded as composite fibers
can be spun by a method known per se.
can. According to the present invention, the elastic fiber of the present invention
The undrawn yarn thus spun is then heat treated.
Manufactured by. Spun by a method known per se as described above.
The elastic fiber of the present invention obtained by
The fibers are uniform, and the cross-sectional shape depends on the shape of the cap.
are doing. When producing the elastic fiber of the present invention by the above method
In this case, the suitable range differs depending on the type of polymer.
Generally, the pick-up speed is about 10 to about 200 m/min.
and usually preferably about 10x to about 100x draft
It is preferable to perform spinning while cooling as quickly as possible at a high rate.
Delicious. According to the above method, there are advantages compared to the method described below.
The desired properties of the present invention are obtained by heat treatment from the undrawn yarn.
Produce elastic fibers with improved elastic properties
It is relatively difficult to do so. This means that the above spinning method
This is combined with the fact that rapid cooling is relatively difficult in this method.
The undrawn yarn is drawn using the mesh cap described in detail below.
Generally, the desired elasticity is higher than that of undrawn yarn obtained by
Requires long time due to heat treatment to impart properties
It is understood from this. Also, the above method is clearly
The above-mentioned method, which has low productivity, is therefore not suitable for the present invention.
It is not recommended as a method for producing sex fibers.
Not the method. According to the method of the present invention, at least two thermoplastic
The polymer has the following formula α=Va−Vf/Va×100 [Here, α is the number of pores in the spinneret.
Va is the porosity (%) of the spinneret.
The apparent total area occupied by the unit area of the shoe-like part
, and Vf is the unit surface of the mesh-like part of the spinneret.
Occupation of partition members surrounding the gap under stacking
is the total volume. ] Adjacent porosity expressed as approximately 10% or more
Melting from a mesh-like spinneret with many slits
It is extruded as a liquid and converted into a trickle. The spinneret used in the present invention is empty as described above.
A large number of closely spaced pores defined by the value of porosity (d)
has. In the above equation that defines the porosity,
What is the mesh-like part of the spinneret?
It is literally a mesh-shaped part.
Ru. The spinneret used in the present invention has the above porosity value.
A limit with many closely spaced slits defined by
the shape of the slit or the partition that defines the slit
The shape of the material may be any shape. The mesh spinneret used in the present invention is
Therefore, for example, circular, circular, triangular, square, etc.
It may be a polygonal shape or define a slit.
The partition member may or may not have unevenness.
It's okay. FIG. 1-a of the accompanying drawings shows a device used in the present invention.
A typical example of a mesh spinneret is illustrated.
There is. The illustrated mesh-like spinneret can also be used as a woven metal.
It's a net. Figure 1-b shows a cross section of the wire mesh in Figure 1-a.
The diagram is illustrated. The plain weave wire mesh shown in the figure has slits in a rectangular shape.
The mixed gas is extruded from adjacent slits
A recess that allows the polymer melt to pass through each other.
is included in the partition member of the adjacent narrow gap. The mesh spinneret used in the present invention has a thin
A large number of fine details are created using precise etching technology on a thin metal plate.
It may also be an etched perforated plate with gaps. child
The etched perforated plate has triangular slits.
The partition member existing in the adjacent narrow gap is a recess.
does not have. The mesh spinneret used in the present invention is
It may also be a woven wire mesh, or a large number of microscopic wire meshes.
Metal spheres sintered to form numerous slits
It may be a thin sintered body. Also, the adjacent slit
An etching device in which the partition member between the two has a concave part.
It may also be a perforated plate. What is used in the present invention?
A part of these mesh-like spinnerets was disclosed in Japanese Patent Application Laid-Open No. 1986-
It is disclosed in the specification of Publication No. 140110. In the present invention, these mesh-like spinnerets
can be used not only alone but also in combination.
It can also be used in a stacked manner. Among these spinnerets, according to the present invention, preferred
Preferably, the spinneret has an uneven discharge surface.
A large number of slits separated by wide partition members.
molten liquid extruded from the slits having the slits
melt extruded through other slits adjacent to it
and the recess of the partition member so that they can come and go each other.
A mesh-like spinneret with a hollow structure is used. Defining the mesh-like spinneret used in the present invention
In the above formula expressing the porosity, Va is the spinning
Apparent area occupied by the mesh-like part of the cap under the unit area
is the total volume of the spinneret, and Vf is the mesh shape of the spinneret.
A partition surrounding a slit under a unit area of
This is the total volume occupied by the member. Again illustrated in Figures 1-a and 1-b of the accompanying drawings.
As you can see, the surface of the cap
Assuming a virtual surface in contact with and the back surface, this
Unit area of 2 pieces (1cm ² ) body formed by imaginary lines of
As the product, the above apparent total volume (Va) is defined as
be done. Va for an actual mesh-like spinneret
To find out, 1cm ² Dial game with contact surface of
Measuring the thickness of the mesh spinneret with a
Va can be easily found by Also, Vf for a certain mesh-like spinneret is
In order to obtain
For example, cut it into pieces and submerge it in liquid to increase the
All you have to do is measure the added volume. This increased volume
A mesh spinneret 1cm ² The value converted per hit is
It becomes Vf. According to the present invention, the porosity α is, as described above,
Since it is expressed by the following formula α=Va−Vf/Va×100, the following formula is used to calculate Va and Vf.
1cm of the shoe-shaped spinneret ² Based on the standard, Va can be expressed as
The numerical values are shown in Figure 1-b, Figure 2-b and Figure-3.
The thickness of the mesh spinneret is expressed as understood.
It can be seen that the value is equal to The mesh-shaped spinneret used in the present invention
preferably has a porosity of about 20% to about 90%
There is. Furthermore, the mesh-like spinning yarn used in the present invention
The base is 1cm ² preferably about 5 or more, more preferably about 5 or more
or about 10 to about 10,000, particularly preferably about 100 to about 10,000
It has approximately 1000 slits. Furthermore, the mesh-like spinning yarn used in the present invention
The cap is about 10 mm or less, more preferably about 0.1 to about 5 mm.
mm, particularly preferably from about 0.2 to about 2 mm.
ing. The spinneret of the present invention having the above-described structure is
The polymer melt on the surface of the molding area is ejected.
The average distance of the narrow gap () is in the range of 0.03 to 4 mm.
Preferably. In particular, if the forming area complies with the definitions explained below.
(1) The average distance between discharge ports () is in the range of 0.03 to 4 mm.
(2) The average mountain height () ranges from 0.01 to 3.0 mm, (3) The average mountain width () ranges from 0.02 to 1.5 mm, and (4) The average mountain height () and the average mountain width () Toga
A discharge having fine irregularities and numerous slits satisfying the range of 0.3 to 5.0 expressed as ()/().
It is advantageous to use a spinneret with a raised surface. Above molding area, average distance between discharge ports (), flat
The average mountain height (), average mountain width (), and slit are respectively
Defined by the description below. The average narrow gap distance () defined in this invention,
The average mountain height (), average mountain width (), etc. are all geometric.
It is a value determined based on the concept of statistical probability theory.
The shape of the molding area surface is geometrically clear.
For mathematical definitions and techniques of integral geometry
Calculated by. For example, a sintered body of spherical objects with radius r is most closely packed.
Theoretically, the molding area of the cap is =√3
r, = π/4r, = π/2r. In this way, the surface of the cap has a micro-uniform geometric shape.
There is a theory regarding things that are composed of a collection of things.
Although it is possible to define a surface that is microscopically uneven,
For those with a surface shape, the cap should be placed in several places.
Materials that can be cut at right angles or are easy to cut
Make a mold of the surface of the cap using a metal tool, cut it and measure it.
By doing so, we can determine
Ru. During the actual measurements, the molding area was macroscopically uniform.
Set the origin at the center of the forming area as long as it is the surface of the forming area.
Measure by taking 6 cross sections every 30° around the center.
It is possible to approximately find .
For now, this is sufficient for practical purposes. The molding area refers to the melting area as illustrated in Figure 2.
A port for discharging the coalescence and spinning and forming the fiber aggregate.
In gold 7, fibers having a substantially uniform density
Refers to the area where the focusing body is formed. The slit in the present invention means that the forming area of the cap is
Even surface (a macroscopic view that averages out minute irregularities)
When cut at right angles to (smooth virtual surface)
(This cross section is simply referred to as the molding area cross section), polymer
Of the flow paths that can discharge and flow, is it on the surface side of the molding area?
The first minimum visible when viewed perpendicular to its mean plane
Refers to the flow width part. Arbitrary cutting in the generalized molding area of the present invention
A schematic enlarged view of the surface is shown in FIG. This figure 3 smell
Therefore, Ai and Ai+1 portions are slits. Also, that of adjacent arbitrary slits Ai and Ai+1
The distance between each center line is called the narrow gap distance pi, and all
The average of pi in the cross section is defined as the average narrow gap distance.
to justify In addition, the right side adjacent section of the arbitrary discharge port Ai of the arbitrary cross section
The part of the surface that is closer to the surface of the molding area than the Ai part,
It is called the mountain Hi attached to Ai, and furthermore, the peak and Ai
The average space perpendicular to the plane hi is called the peak height of Hi.
Define the average of hi in all cross sections as the average peak height.
to justify Also, the flat of the mountain Hi sandwiched between the slits Ai and Ai+1
The width parallel to the even surface is called the mountain width di, and it applies to all cross sections.
Define the average of di as the average mountain width. According to each definition mentioned above, the base of the present invention
The molding area of the molten polymer is (1) The average gap distance () is in the range of 0.03 to 4, preferably
Preferably in the range of 0.03 to 1.5 mm, especially in the range of 0.06 to 1.0 mm (2) In the range of 0.01 to 3.0 mm for average peak height ()
Preferably in the range of 0.02 to 1.0 mm; (3) Average mountain width () in the range of 0.02 to 1.5 mm;
or (4) Average mountain height () and average mountain width () are /
Expressed in d, the range is from 0.3 to 5.0, preferably from 0.4 to 5.0.
Micro-rough surface and numerous pores that satisfy the range of 3.0
It is advantageous to have As mentioned above, the values of , , and / are (1)
〜(4) and (−
d) The value represented by / is in the range of 0.02 to 0.8, preferably
The surface of the cap should preferably be within the range of 0.05 to 0.7.
It is even more advantageous to set the structure of This (−
d) In other words, the value of / is the forming area of the slit.
This is a value representing the area ratio in . The method of the present invention uses a mesh-like spinneret as described above.
Apply Joule heat to the partition member of the mesh-shaped part of
The discharge surface of the spinneret and its
The discharge side surface of the spinneret is supplied with a cooling fluid in the vicinity.
Extrusion of thermoplastic polymer melt while cooling near the surface
It is characterized by the fact that it performs Partition of a spinneret as described above used in the present invention
The material of the reinforcing element therefore consists of a conductor. So
Examples of such materials include platinum, gold, silver,
Copper, titanium, vanadium, tungsten, iris
aluminum, molybdenum, palladium, iron, nickel,
Chromium, cobalt, lead, zinc, bismuth, tin
single metal such as aluminum; stainless steel
Teal, Nichrome, Tantalum, Shinchiyuu, Rin
Alloys such as bronze and duralumin; non-golds such as graphite
Examples include genus conductors. Generates Joule heat in the partition member of the spinneret.
In order to
Either energize the spinneret directly to
The coil is placed inside the inner die of the spinneret.
The spinneret is energized to generate eddy currents in the spinneret.
All you have to do is operate. At that time, the current is directly energized.
In some cases, either direct current or alternating current may be used, but eddy current
In the case of current, it is alternating current. According to the method of the present invention,
Spinning is possible because the structure of the spinning device is simple.
A method of directly energizing the cap is advantageously adopted.
Ru. The spinneret typically has a current of 0.1 to several hundred amperes.
is passed directly or 0.1 to several tens of volts/cm
An electric field is applied to generate eddy currents, preferably
or 1cm of the spinneret ² Approximately 0.5 to approximately 5,000 watts per unit
Energy is given in the amount of From the partition member that defines the slit of the spinneret, the
According to the method of the present invention that generates heat from the spinning
Compared to methods that do not generate heat from the cap, at least
As it passes through the slit, heat is released instantaneously to the thermoplastic polymer.
supplied at the time. This means that the polymer is the discharge surface.
the discharge surface so that it smoothly separates from the flow and transforms into a trickle.
The viscosity or temperature of the polymer melt at
This allows for control within the desired range. According to the method of the present invention, as described above, the
The appropriate temperature is instantly set on the spinneret partition member.
imparted to the polymer by
Does not degrade polymers or convert them into fibers
It doesn't disassemble to the point where it doesn't work, and it's a book.
According to the spinneret as described above in the invention, the spinning
Cooling fluid, such as air, is applied to the discharge surface of the thread nozzle and its vicinity.
The polymer is dissolved only by supplying air and cooling.
Solidification because it is possible to convert the melt into a trickle
The length can be shortened and therefore stable in a trickle
You can continue converting. Therefore, according to the method of the present invention, the raw structure
The C-axis of the char crystal is almost in the direction of the fiber axis.
Light elastic fibers are subjected to short heat treatment (e.g.
1 second for undrawn fibers produced under suitable spinning conditions.
Even with the following short heat treatment, the improved
(gives elastic fibers with elastic properties)
The C-axis of the raw structure crystal is fine.
Crystals grown so that they can be easily aligned along the fiber axis
It has the advantage of providing undrawn fibers with As can be understood from the above description, the present invention
According to the above-mentioned object and
Advantages are advantageously achieved. In the method of the present invention, a melt of a thermoplastic polymer is
The discharge amount is 1cm of the mesh spinneret. ² Approx. hit
It can be from 0.1 to about 20 g/min. Furthermore, quite surprisingly, the method of the invention
The normal vector of the spinneret discharge surface is opposite to gravity.
Direction upward and extrude from the discharge surface.
By pulling the small stream against gravity, the
To continue to take in the trickle and spin it even more stably.
(This method is explained below)
(referred to as upward spinning). The spinneret used in the present invention is as described above.
By having a porosity (α) of approximately 10% or more,
mesh with many closely spaced slits defined
A U-shaped spinneret, preferably from about 20% to about 90%
%, preferably with uneven parts on the discharge surface of the spinneret.
Multiple partitions separated by narrow partition members with
has several slits and is extruded through the slits.
The melt is extruded from other adjacent slits.
The molten liquid and the recessed part of the partition member pass through each other.
It is a mesh-like spinneret with a structure that allows
Ru. The spinnerets used in the present invention are
Because it has a large number of slits, there is no pressure from adjacent slits.
A structure in which the discharged polymer melt can come and go
It has a structure, especially the partition between adjacent narrow gaps.
If the member has a recess, the adjacent
The polymer melt extruded from the adjacent slits becomes more frequent.
It becomes possible to come. The method of the present invention uses a spinneret having the above-mentioned characteristics.
To use gold, turn the discharge side of this spinneret upwards.
extruded onto the discharge surface by directing the
What is the direction in which the polymer melt is drawn as a trickle?
Due to the force of gravity acting in the opposite direction,
The base of a single rivulet that looks like a mountain spreads out.
They come and go each other in adjacent narrow gaps like this.
, thereby supplying the polymer melt to each slit.
It has become even more stable, and now it looks like a mountain.
The shape of the base of the rivulet is now uniform between each rivulet.
Una, even more stabilized spinning conditions are provided.
It is believed that The upward spinning method of the present invention uses a mesh-like spinneret.
The normal vector of the discharge surface is the gravity (G) and the total
The direction completely matches the opposite vector (-G→)
or upward so that even if it deviates, it is within a few degrees.
It is desirable to implement this with a view to achieving this goal. In addition, it is extruded from the discharge surface during upper spinning.
The take-up direction of the trickle is the normal vector direction of the discharge surface.
Angle up to approximately 30 degrees away from the direction or normal direction
It can be in the direction of Also, the discharge surface of the spinneret should be oriented in the direction of gravity for spinning.
Compared to the method of making yarn, the upward spinning of the present invention
For example, it becomes possible to further shorten the coagulation length.
If it becomes shorter, the type of polymer and the viscosity of the melt
etc., but the same can be said about polymers of the same type.
In general, the lower the viscosity, the shorter the solidification length.
be able to. Shorten the coagulation length to about 10%
It is easy to do so. Therefore, according to upward spinning, shorter distances and
The temperature of the trickle leaving the spinneret in a shorter time
Because it is possible to rapidly reduce the
Unrolled fibers that can be easily made into the elastic fiber of the present invention by
It becomes easy to produce drawn fibers. The base that generates the heat described above and heats it.
The spinning method and upward spinning method used were first developed by the present inventors.
(Japanese application filed on November 26, 1982)
Detailed information in U.S. Patent Application No. 293269)
has been done. The thermoplastic polymer used in the method of the present invention is 2
It consists of more than one type of different thermoplastic polymer,
At least one species can form a row structure.
(hereinafter, this polymer is referred to as polymerization).
(referred to as body (b)), and at least one other type is lamellar crystals.
It has crystallinity that can form a
The combination is called polymer (c)). As mentioned above, the row structure is
Consists of lamellar crystals formed by folding molecular chains
ing. Therefore, the polymer (b) in the present invention is
It forms part of the polymer (c) and is included in the polymer (c).
ing. Examples of the polymer (b) in the present invention include i.
Sotactic polypropylene, polybutene-1,
Poly-4-methylpentene-1, nylon 6, Na
iron 66, polyoxomethylene, poly-3-methylene
Lubutene-1, polyethylene sulfide, polyte
Tramethylene terephthalate, polypivalolact
or mixtures thereof are preferably used. Examples of the polymer (c) in the present invention include poly
Ethylene, ethylene-vinyl acetate copolymerization
body, hard segment and soft segment
Consisting of polyester elastomer, polyethylene
Phthalate, ionomer, polyurethane or
The polymers listed above as examples of polymer (b), or
A mixture of these is preferably used. The polymers (b) and (c) used in the above invention are:
It preferably has a high molecular weight that exhibits fiber-forming properties.
Ru. For example, isotactic polypropylene is
Preferably about 0.1 to about 30, more preferably about 0.5 to about 20
It has a melt index of
-1 is preferably a melt index of about 0.1 to about 30
poly-4-methylpentene-
1 has a melt index of about 1 to about 70.
Ru. In addition, nylon 66 was prepared using 99% formic acid as a solvent at 25°C.
The intrinsic viscosity is preferably about 0.8 or more.
It is preferably about 1 to about 2, and nylon 6
is the solidity measured at 25℃ using metacresol as a solvent.
The viscosity is preferably about 0.8 or more, more preferably
It has an intrinsic viscosity of about 1 to about 2. In addition, polyoxymethylene is p-chlorophenol.
The preferred value is the intrinsic viscosity measured at 25°C using
preferably about 1.3 to about 2.2. Also, polytetramethylene terephthalate is 0
- Measured at 25°C using chlorophenol as solvent.
The intrinsic viscosity is preferably about 0.5 or more, more preferably
Preferably from about 0.7 to about 2.0, polypivalolact
The ratio of phenol to 0-chlorophenol is 6 to 4.
Solids measured at 25℃ using a mixture of (weight) as solvent
The viscosity is preferably about 0.7 or more, more preferably
It is about 1 to about 2.0. Furthermore, polyethylene used as polymer (c)
The melt index preferably ranges from about 0.1 to about 50.
has a value. As ethylene-vinyl acetate copolymer
The ethylene units account for about 60 to about 95% by weight.
It has a melt index value of about 1 to about 400.
is preferably used. It consists of a hard segment and a soft segment.
As a polyester elastomer, Hardse
The main acid component and carbon number are terephthalic acid.
2 to 6 fatty acid glycols as glycol components
Made of aromatic polyester, soft segment
Aliphatic polyether with a secondary dislocation point of 0°C or less
Or an elastomer made of aliphatic polyester
Preferably used. These polyester elastomers include
The weight ratio of hard segments to soft segments is
Those in the range of 70-10 parts by weight vs. 30-90 parts by weight
preferable. Hard segment and soft segment
Even if the component component is alone, it forms a hard segment.
The aromatic polyester containing 50% of the acid component
More than mol% is terephthalic acid and has 2 to 6 carbon atoms
Those whose glycol component is aliphatic glycol
preferable. In addition to terephthalic acid, acid components include, for example, ionic acid.
Sophthalic acid, orthophthalic acid, methyl terephtha
Ruric acid, methyl isophthalic acid, fats with 6 to 12 carbon atoms
Group dicarboxylic acids, etc., which have 2 carbon atoms
~6 glycol is ethylene glycol
tetramethylene glycol, propylene glycol
Coal, hexamethylene glycol, etc.
I can do it. Aromatic polyester (hard
segment) is 2,2-bis(hydroxyethoxyethoxyethoxylate)
cyphenyls) methane, bisphenols, oxy
Contains compounds such as caproic acid and hydroxyethoxybenzoic acid.
It can also contain. Such aromatic polyesters include, for example, polymers.
Liethylene terephthalate, polypropylene terephthalate
Phthalate, polytetramethylene terephthalate
and polyhexamethylene terephthalate.
It will be done. As a soft segment, the secondary dislocation point is 0℃
The following aliphatic polyethers or aliphatic polyesters
is preferred. 1.8/1 to 4.5/1 as aliphatic polyether
Preferably, those having a carbon/oxygen/atomic ratio of
The aliphatic polyester has 4 to 12 carbon atoms.
Aliphatic dicarboxylic acids and aliphatic dicarboxylic acids having 2 to 12 carbon atoms
polyester or aliphatic having 4 to 12 carbon atoms
Polyesters consisting of oxycarboxylic acids are preferred.
stomach. As the above polyester elastomer, especially
Polytetramethylene glycol as glycol ingredient
polyalkylenetele or isophthalene as part of
for example, polytetramethylene glycerin.
coal (preferably with an average molecular weight of about 1000 to about 3000)
) and C ₂ ~C _Four alkylene glycol example
For example, ethylene glycol, trimethylene glycol
one or more of tetramethylene glycol and tetramethylene glycol.
the above mixture (preferably tetramethylene glycol)
terephthalic acid,
or terephthalic acid and isophthalic acid
Polyester elastomer as a component is preferable.
used. Among these, polytetramethylene glycol
and tetramethylene glycol as a glycol compound.
terephthalic acid or terephthalic acid.
Polyester elastomer containing softalic acid as the acid component
Tomer is more preferably used. The above polyester elastomer includes polyester elastomer.
Tetramethylene glycol is a glycol component of approx.
Particularly preferably used is one that accounts for 5 to about 70 wt%.
It will be done. The above polyethylene terephthalate is preferably
Preferably at 25°C using 0-chlorophenol as a solvent.
The intrinsic viscosity measured with is about 0.5 to about 1.2.
Ru. The above polyurethane is, for example, the above polyurethane.
Examples of soft segments of ester elastomers
Aliphatic polyether or aliphatic polyether described as
Esters and aliphatic diols having 2 to 6 carbon atoms
Diisocyanate compounds such as 4,4'-diphenylene
Nylmethane diisocyanate or 4,4'-disic
Polyaddition reaction with lohexylmethane diisocyanate
The one obtained at the earliest is preferably used. In addition, as the ionomer of the polymer (c), α-
Olefin and acrylic acid, methacrylic acid, malaya
Neutralize a copolymer made of acid, etc. with a metal compound
(cross-linked by metal ions) and melt
Index is 0.5~20, melting point is 80℃~110℃
Preferably. For example, as a particularly preferred
Sodium copolymerization of ethylene and methacrylic acid
Examples include those cross-linked with ions and zinc ions.
Ru. Among the above polymers, examples of the polymer (b) include
Isotactic polypropylene, polyoxime
Tyrene or polytetramethylene terephthalate
Preferably used. The polymer (c) is a polymer that forms a crystalline phase.
Polymer segments forming amorphous body segments
copolymers with
Tel elastomers are preferably used. Specifics of polymer (b) and polymer (e) as described above
Examples are polymers which are themselves well known to those skilled in the art.
Ru. Polymer (b) is exemplified as polymer (c) in the present invention.
When using a polymer with
For example, isotactic polypropylene
Different combinations of polyoxymethylene
Of course, this is necessary. Like this example
Both polymers form wax structures.
Even when crystallinity is obtained, these heavy
During coalescence, there is a close relationship with the molding conditions.
Essentially, crystallization conditions such as temperature or
is appropriate because there is a difference in time or medium.
By choosing suitable crystallization conditions, at least some
One of the polymers is polymer (b) and the other is polymer
The elastic fiber of the present invention as shown in (c) is obtained. For example,
50 parts by weight of isotactic polypropylene and polio
Undrawn fibers consisting of 50 parts by weight of xymethylene
Heat treatment at a temperature of 150℃ for about 1 minute according to the method described below.
In this case, the former polymer becomes polymer (b).
The latter polymer is (c). According to the invention, the polymer used as polymer (b)
The difference in melting point between the polymer and the polymer used as polymer (c) is approximately
Between 0 and about 100°C, preferably between 0 and 80°C
The combination of polymers (b) and (c) generally provides the elastic properties of the present invention.
It shows a crystalline alignment structure suitable for giving fibers.
Therefore, the elastic fiber of the present invention can be easily imparted by heat treatment.
It is preferably used for this reason. According to the present invention, as the polymer (b), isotactic
Using polypropylene as the polymer (c),
Polytetramethylene glycol and tetramethylene
With lene glycol as a glycol component, terephthalate
acid or terephthalic acid and isophthalic acid.
Using polyester elastomer as a component
or polyoxymethylene as polymer (b)
Polytetramethylene glycol as polymer (c) used
glycol and tetramethylene glycol
As a component, terephthalic acid or terephthalic acid and
Polyester elastomer containing isophthalic acid and isophthalic acid as acid components
using a polymer (b) or as a polymer (b).
Polymer using ritetramethylene terephthalate
(c) as polytetramethylene glycol and
Tramethylene glycol is used as a glycol component,
Terephthalic acid or terephthalic acid and isophthalic acid
Polyester elastomer containing oleic acid as the acid component
It is particularly preferable to use According to the method of the present invention, polymer (b) and polymer (c)
Two or more thermoplastic polymers containing
Book as a composite or in the form of composite fibers
Inventive elastic fibers can be provided. According to the method of the present invention, two or more of the above thermoplastic
From the plastic polymers (b) and (c), by the above spinning method
The obtained undrawn fibers are then heat treated
This gives the elastic fiber of the present invention. In that case, the heat treatment method is the hot air circulation method.
Radiant addition from infrared heaters and sheathed heaters
Thermal method, heating drum contact method, hot water, steam, and
Various heating methods using heat media such as recon oil
There is a method. One of these methods may be used.
However, they may be combined. These heat treatment methods include
Use the most appropriate method depending on the type of coalescence (b)
Can be done. The optimal method is easily determined by experiment.
be able to. For example, dry heat treatment is generally preferred.
However, if polymer caproamide is used as polymer (b),
In the case of drawn fibers, it is desirable to perform moist heat treatment.
stomach. The heat treatment temperature is controlled by polymerization to form undrawn fibers.
The following range is desirable depending on the melting point of body (b).
stomach. Melting point of polymer (b) ( ⁰ K) x (0.8 to 0.98) More preferably, the melting point of the polymer (b) ( ⁰ K)×(0.9
~0.97). Polymer melting point (absolute temperature)
Temperatures exceeding 0.98 times (degrees)
On the other hand, the melting point (absolute) of the polymer
At temperatures below 0.8 times body temperature), the desired elastic properties are not achieved.
Only fibers with no properties can be obtained, or
Long heat treatment times required to give desired elastic fiber properties
It shows a tendency to For example, isotactic polypropylene and
Undrawn fibers with lyester elastomer are as described above.
Melting point of isotactic polypropylene as
168℃ (441 ⁰ K), preferably
about 80°C to about 159°C, more preferably about 124°C to about
Heat treated at 155℃. Heat treatment time depends on heat treatment temperature
However, in some cases, a time of less than 1 second is sufficient. the above
Spinning using a spinneret heated by Joule heat
The undrawn fiber obtained by this method is as described above.
wax structure can be easily removed by heat treatment.
Because it has a crystal structure that gives an elastic fiber with
Therefore, the elastic fiber of the present invention can be produced by heat treatment for a relatively short time.
give. Generally, the heat treatment time is from a few seconds to 60 minutes.
Ru. Even when undrawn fibers are under tension during heat treatment,
It's okay, and it's okay to be in a state of tension. preferably
For the same processing time, it is better to be in a somewhat tense state.
Provides elastic fibers with excellent elastic recovery properties. Furthermore, stretching treatment can be performed after the above heat treatment.
Ru. This improves elastic properties and latent thermal crimpability.
It can be made into an elastic fiber with even higher .
The expansion process can be performed up to an expansion rate of approximately 2 times.
I can do it. Preferably about 1.01 to about 1.5 times
be. According to the method of the present invention, an elastic fiber aggregate is produced.
A series of steps will be explained using FIG. 2.
Figure 2 shows a schematic diagram of the manufacturing equipment.
To simplify the explanation, we will explain the manufacturing process.
Other equipment or parts that do not have a significant impact may be omitted.
It should be understood that In addition, Figure 2
is the spinneret facing in the direction opposite to the direction of gravity.
This figure shows the manner in which fiber aggregates are formed.
However, the method of the present invention is not limited to this embodiment.
Needless to say, there is no such thing. In Figure 2, a hotspot for storing thermoplastic polymers is shown.
Par is shown as 1a and 1b. Polymer (b)
and polymer (c) are made by blending polymer chips.
Store it in one of the hoppers and feed it.
2a or 2b, extruder 3a or 3b,
to the die 6 having the cap 7 through the conduits 5a, 5b.
Supplied. In addition, one hopper example of polymer (b)
For example, in 1a, polymer (c) is added to another hopper, for example 1b.
and feed it to the die in the same way as above.
You can also do it. In the following, Figure 2 is used to describe polymer (b) and polymer (c).
Blend Marchip and use only Hopper 1a
Let me explain the case. In Figure 2, the thermoplastic polymer is hopper 1a.
from which it is exported by feeder 2a.
It is supplied to the struder 3a. This router 3
The polymer melted in step a is transferred to gear pump 4a.
and is quantitatively fed to the die 6 via the conduit 5a.
Ru. Although it is not shown in the drawing, die 6 has a
The polymer inside remains molten and reaches the desired temperature.
A heater is generally provided to heat the
There is. 7 is a spinneret installed above the die 6
, and the discharge surface of the molten polymer of this spinneret 7 is
is directed in the opposite direction to gravity. This spinning
A mesh-like mouthpiece that constitutes the discharge surface of the thread mouthpiece 7
It is possible to conduct electricity through the copper plate 8.
Ru. Here, electricity is supplied to both ends of the mesh-shaped cap.
The electricity taken in from the transformer 9 and the
The voltage and current are adjusted and connected by the duct 10.
This is done by continuing. The finely divided material discharged from the mesh-like spinneret
The molten polymer is cooled by cooling fluid near its discharge surface.
The cooling fluid supplied through the supply device 11 (e.g.
The fiber aggregate 1 is cooled by air) and solidified.
3 and is taken up by the take-up roller 12.
Ru. This cooling fluid supply device 11 is divided into
the mesh so that the molten polymer solidifies rapidly.
The molten polymer discharge surface of the shaped spinneret 7 and its
Toward the vicinity, the cooling fluid has a velocity and is uniform throughout.
It is intended to be supplied to the public. For this reason, the cooling fluid supply device 11
Alternatively, one with slits is suitable. child
The cooling fluid is the solidification length from the discharge surface of the molten polymer.
(P(S)) is 2cm or less.
It is preferable to determine the direction. This coagulation length (P
(S)) is the discharge surface of the molten polymer of the spinneret.
Distance from where the molten polymer becomes fibers and solidifies
means. The formed fiber polymer 13 is placed on the spinneret 7.
The material is taken up by a take-up roller 12 provided on the side.
and sent to a heat treatment process. In Figure 2, the heater
A heat treatment apparatus 14 is shown having a. this
is just one example, and this section
Not only modification, but also other heat treatment methods,
There is no problem. In the process shown in Figure 2,
From the speed of the fiber aggregate passing through the roller 12
Also, roller 15 (the roller itself is cooled with water etc.)
Fiber aggregates collected by
It is designed so that the speed of the body is almost equal, and the speed of the body is
be transferred. In addition, this roller 15 and the stretching roll 1
It is also possible to cold stretch the fiber aggregate between 6 and 6.
It is possible and generally preferred. Hidden
According to the method of the present invention, as is clear from FIG.
The fiber polymer is oriented upward in a long and narrow strip.
It can be formed by
For example, heat treatment process, crimping process, cutting process
(short fiber production process), opening process, webbing process, etc.
It is possible to lead to the process of Further from Figure 2
Overall, the device is extremely compact and simple.
Therefore, it is easy to produce a large amount of fiber aggregates.
can be understood. The trickle of molten polymer exiting the spinneret is
According to the following formula, the packing flux is
Yong (PF) 10 ^-Four from 10 ^-1 Pull it in the range of
It will be done. This value is 10% higher than that of conventional melt spinning. ^-Five than the degree
is also much larger. PF=1/Da (Here, Da is the apparent draft ratio.) This packing fraction (PF) is
Fibers formed per unit area of the forming area of the thread nozzle
Indicates the sum of the cross-sectional areas of all fibers in the fiber assembly, and indicates the fiber shape.
The density of the fibers spun (discharged) from the forming area,
In other words, it is a measure of high-density spinning performance. Appearance of polymer melt discharged from spinneret
The draft ratio (Da) of can be expressed by the formula below.
Ru. Da=VL/V ₀ [In the formula, VL is the actual take-up speed of the fiber bundle
(cm/min) and V ₀ The polymer melt is in the spinneret.
is ejected covering the entire ejection surface of the fiber forming area.
This is the average linear velocity (cm/min) in the discharge direction. ] The elastic of the present invention is made of two or more thermoplastic polymers.
The fibers preferably have a mesh base as described above.
Spun by the spinning method used and then obtained
By heat-treating the undrawn yarn, as described above,
Manufactured by The elastic fiber of the present invention is as described above.
It is composed of a mixed polymer of polymer (b) and polymer (c).
both in the form of composite fibers and in the form of composite fibers.
including, but not in any of these forms.
Whether the melt is supplied to the mesh-shaped mouthpiece or
Dispersion state of polymer (b) and polymer (c) in molten state
controlled by. For example, polymer (b) and polymer (c) are
blend and then through an extruder.
In the mixed extrusion method as explained in Fig. 2,
Polymer in the polymer melt supplied to the tube mouthpiece
(b) and polymer (c) are mixed relatively well, and the
It is clearly shown in the photograph of FIG. 7 shown in the example described in
As observed in
The coalescence seems to be finely dispersed in the fiber cross section.
The elastic fiber of the present invention is provided. Separately, polymer (b) and polymer (c) are shown in Figure 2.
stored separately in the hoppers 1a and 1b shown;
After passing through the conduits 5a and 5b, the die 6
Screw type extrusion before reaching
In the extruder, both polymers are
Similar elastic fibers are also produced by mixing
can do. On the other hand, polymer (b) and polymer (c) are
stored separately in zupā 1a and 1b, and e.g.
For example, the static system proposed by the present inventors
Method using kisser (Japanese Patent Application No. 168571/1983)
), polymer (b) and polymer (c) are meshed together.
A relatively large block appears when it reaches the U-shaped nozzle.
Prepare a polymer melt that forms (after
This is clearly shown in the photograph of FIG. 5 shown in the described examples.
) and then insert the port with the mesh-like cap.
According to the method of cutting the remer melt, the following
This can be clearly observed in the photograph of FIG. 6 shown in the example.
Polymer (b) and polymer (c) are each
Forms a relatively large polymer phase in the fiber cross section
The composite elastic fiber of the present invention is provided. used for mixing polymer melt in the present invention.
The various static mixing units that
Can be used alone or in combination. Also,
Perforated corrugated plate at regular intervals or as is
A large number of densely arranged and laminated porous materials, plain weave
and/or a large number of various wire meshes such as twill weave in the vertical direction.
Densely arranged and stacked porous body, and many minute gold particles
Pores with densely packed, arranged, sintered, and fixed spherical particles
Body thin layers may also be used. Use a commercially available static mixer
For example, Kenix's Stats
Mixer, Sluzer's State Mixer
unit, Charles Ross ISG mixer
-, Sakura Seisakusho Square Mixer, Komatsu C
Stem Komax mixer, Bayer Bayer
Examples include Le Container Mixer.
Another species of status used in the present invention
Those characterized by the following (a) to (e) as kissers
There is. (a) A stack of many plates with recesses
(b) the recess in the plate is a laminate for fluid conduction;
Shape the inlet and the fluid outlet that communicates with the fluid inlet.
(c) the plate has at least two different recess shapes;
consisting of at least two types of plates having
(d) Fluid inlet of the plate with the same recess shape.
form a common inlet for the same fluid.
The laminate thus has at least two different flows.
have at least two common entry points into the body;
and (e) the fluid outlet is configured to accommodate at least two different fluids.
Configured to provide adjacent fluid flow. In this specification, a mixer composed of the above (a) to (e) is used.
“Laminated plate type static mixer”
It is sometimes abbreviated as. Such a laminated plate mold
To the best of the inventors' knowledge, the vertical mixer is
This is a new type of mixer that has not been known since.
Depending on the use of such a mixer, at least two types of
The different polymer phases form a laminar structure, i.e.
A large number of macroblend melts coalesce in a thin laminar flow.
A melt can be easily obtained. This laminated play
The static mixer produces extremely thin layers.
It is possible to obtain a molten liquid having the following properties. The depth of this recess
(t ₂ ) is the thickness of the plate (t ₁ ) is smaller than
However, one that satisfies the following formula is preferable. 0.2t ₁ ≦t ₂ ≦0.8t ₁ [here t ₁ is the plate thickness (mm) and t ₂ teeth
Indicates the depth of the recess (mm). ] The particularly preferable depth of the recess satisfies the following formula:
It is something. 0.3t ₁ ≦t ₂ ≦0.7t ₁ [here t ₁ and t ₂ The definition is the same as above] Thickness of the plate with the recess (t ₁ ) are all the same
It does not have to be the same thickness, but it is generally the same thickness.
It is a homogeneous macro that different types have the same thickness.
Desirable for obtaining blended melts. Especially, all
at least one plate of the same thickness and depth
A static mixer is constructed by stacking two types.
It is particularly advantageous to Plate thickness (t ₁ ) ranges from 0.05 to 2 mm,
Preferably, the range is 0.1 to 1 mm, and 0.2 to 0.7
A range of mm is most preferred. Laminated plate type static mechanism according to the present invention
The width of the plate with the recess that forms the kisser
(W) is generally 5 mm to 100 cm, preferably 1 cm
~50cm range. Also, a plate with this recess
The height (H) of the seat is 5 mm to 50 cm, preferably 1 cm to 30 cm.
cm range is good. The above static mixer is shown in Figure 2.
into the die 6 and/or from the conduits 5a, 5b.
It can be used by providing it on the way to 6.
Wear. Figure 4 shows an example of a die used in the method of the present invention.
For ease of understanding, its vertical cross-sectional view
This is a schematic diagram. This figure 4 was explained earlier.
The die 6 shown in Figure 2 is sandwiched between copper plates at both ends.
Look at both ends of the mesh-like spinneret from above and
As if cut approximately at the center at right angles (vertical direction).
It should be understood that the figure shows a cross-sectional view. In this figure 4, 11 indicates the die itself.
12 is the ruler 3 and gear pump 4 in Fig. 2.
and of the molten polymer fed via conduit 5.
Shows the flow path. This die 11 has melting
Electric heater to maintain polymer at desired temperature
-13-a and 13-b are built-in. Applicable
The molten polymer sent through the flow path 12 is
A melting machine containing a box type static mixer 17
Introduced into the coalescence reservoir 14 where it becomes stable and stable.
rise upwards. A spinneret is installed above the die 11.
However, in Figure 4, mesh 15 is used as a spinneret.
The width indicated by X is shown in the figure.
However, the molten polymer is discharged from the slits of the mesh and becomes a fiber.
indicates the width of the area formed as an aggregate.
Ru. Note that the mesh is the tightening tool 16-a and 16-a.
-b is firmly attached to the die 11.
The part sandwiched by the mesh tightening tool is
The joints of the mesh are made of inorganic adhesive, high melting point or
are covered with thermosetting resin, etc., and do not conduct electricity.
This is done so that it does not occur. In Figure 4, the arrow
The direction means the opposite direction of gravity, and y=0 means the direction of the melt.
The position of the discharge surface of the molten polymer is shown. Of course, both ends of this mesh 15 (not shown)
(not) through the copper plate so that the current flows
Cord is connected. Static mixer and mesh opening as above
Manufacturing the composite elastic fiber of the present invention using gold
In this method, multiple melt phases of different thermoplastic polymers are
A mixed polymer melt with several effective continuous boundaries
liquid (i.e. macroblend melt) into the nozzle.
More than 1/4 of the length of the partition member that partitions the gap,
preferably that of the boundary line rather than the length of the partition member.
A cap with partition members that are longer than each other.
It may be spun using. The book thus produced
The composite elastic fiber of the invention has a block in the cross section of the fiber.
The average number of Tsuku ((B)) is preferably 1.5 to 20,
Particularly preferably, it has 2 to 5 pieces. Here, (B) is any position of any 30 fibers.
Thermoplasticity determined by microscopically observing the cross section of
means the average number of independent blocks in a polymer
There is. Such composite elastic fibers of the present invention have already been developed.
As mentioned above, it exhibits elasticity based on its crystal structure.
2 in that it can exhibit elasticity based on a composite structure.
Polymer blend of more than one type of thermoplastic polymer
Features not found in the relatively finely dispersed elastic fibers of the present invention
It can be said that it has character. The elasticity based on the composite structure is achieved by using the elastic fibers of the present invention.
can be applied during the heat treatment described above, or
It is applied by performing another treatment after the heat treatment.
You can also. The elasticity based on the composite structure is
It is also given by the crimp form. That is, this
Crimp fibers such as
Perform heat treatment using dry heat or boiling water in a clean state.
or by simply stretching the composite fibers.
can be manufactured by The number of crimp of crimped fiber is good.
Preferably 3 to 20 pieces/inch, more preferably 5 to 20 pieces/inch
It has 15 pieces/inch. Elastic fiber of the present invention According to the method of the present invention, as already mentioned above,
(a) Elastic fibers made of two or more thermoplastic polymers;
(b) at least one of the thermoplastic polymers is a wax.
It has crystallinity that can form a structure.
(c) at least one other thermoplastic polymer is a resin;
It has crystallinity that can form melar crystals, and
(d) the elastic fiber has improved elastic properties, characterized in that it has a wax structure;
The above elastic fiber is provided. The elastic fibers of the present invention include two or more types of thermoplastic fibers.
It is composed of polymers and has deposited lamellar crystals.
It is novel in that it has a structure. child
The elastic fiber of the present invention such as
wax structure in at least one of the polymers
using a polymer with crystallinity that can form
At least one other element has crystallinity that can form lamellar crystals.
Can be produced by using a polymer with
has been clarified by the present invention. The elastic fiber of the present invention comprises the above polymer (b) and polymer (c).
As long as the polymer (b) and the polymer (c) contain
It may be contained in a certain proportion. of the present invention
In the elastic fiber, preferably the polymer (b) is
It occupies about 10 or more parts of the body. The elastic fiber of the present invention is a rod consisting only of the polymer (b).
Elastic fibers with structure and polymerization
Fiber consisting only of polymer (c) (polymer (c) contains wax and steel)
Polymerization to form tracts and give elastic fibers
body, elastic without forming a row structure
Polymers that give fibers and wax structures
does not form any elastic fibers and does not itself provide elastic fibers.
improvement compared to any of the
It has excellent elastic properties. The elastic fibers of the present invention are compared as a general trend.
In areas with a high proportion of polymer (b), only polymer (b)
Almost the same elastic recovery compared to elastic fibers made of
greater elongation and lower initial bullet
Indicates sex rate. In addition, the elastic fiber of the present invention
In regions where the proportion of polymer (c) is relatively high,
(c) Larger elastic curvature compared to fibers consisting only of (c)
Recovery rate, greater elongation and greater initial elasticity
Show rate. The specific elastic properties exhibited by the elastic fibers of the present invention are important.
Types or mixing state of coalesce (b) and polymer (c), etc.
It should be fully understood that the
This will be clearly understood from the following examples. The elastic fiber of the present invention is an elastic fiber made only of polymer (b).
Especially suitable for use in clothing compared to synthetic fibers.
from the point of view of showing improved elastic properties.
For example, it consists of a mixed polymer of polymer (b) and polymer (c).
In the case of polymers, preferably polymer (b) accounts for about
Occupies 30% by weight or more, more preferably 45-90% by weight.
Polymer (b) and polymer (c) are composite type
In the form of fibers, preferably polymer (b)
is about 10% or more by weight of the total polymer, more preferably
Approximately 25 to 90% by weight, especially 30 to 50% by weight
It is. The above polymer blend type elastic fiber of the present invention
is the elastic fiber of the present invention in the form of the above-mentioned composite fiber.
The combination of similar polymers (b) and (c)
Increase the ratio of polymer (c) to polymer (b) in
As the proportion of polymer (b) increases, the area where the proportion of polymer (b) is relatively high
In general, the elongation increases and the initial modulus decreases.
There is a greater tendency to On the other hand, the elastic of the present invention in the form of the above-mentioned composite fiber
The elastic fiber is the polymer blend type elastic fiber of the present invention.
The combination of homogeneous polymers (b) and (c) compared to
In this case, an elastic fiber consisting only of polymer (b) is shown.
The elastic recovery rate is almost the same as that of
The usage rate of coalescence (c) is very wide. According to the present invention, the polymer blend type book
The elastic fiber of the invention and the composite elastic fiber of the invention
Characteristic elastic properties of at least one composite fiber
The polymer phase of can form a wax structure.
Other heat that can form lamellar crystals with thermoplastic polymer (b)
A polymer blend consisting of a plastic polymer (c)
It has been shown that this can be expressed by After 50% elongation, the elastic fiber of the present invention is
the elastic recovery rate (ER) of is at least 70%;
Preferably it is at least 80%. The elastic fiber of the present invention has an initial elastic modulus of 0.5 to 15.
g/de, preferably 1 to 10 g/de, and more
Preferably it is 1.5 to 5 g/de. The elastic fiber of the present invention has an elongation of 200 to 700%,
Preferably it is 300-600%. Furthermore, the elastic fibers of the present invention are oriented in the fiber axis direction.
degree is 70% or more, preferably 75% or more, and
If we focus on the crystals of U structure,
The C axis of the U structure crystal is almost the fiber axis.
in the direction and the crystals of the wax structure
The long period of is 80 to 400 Å, preferably 100 to 400 Å.
be. The elastic fiber of the present invention can be used with a mesh base as described above.
By spinning using fibers, it becomes an aggregate of many fibers
It can be obtained by These elastic fibers and aggregates
In addition to the characteristics described above, it has the following characteristics.
Ru. The fibers constituting the aggregate of the present invention are
When cut at an arbitrary position perpendicular to the fiber axis, the
90% or more of the surface, preferably 80% or more, particularly preferably
More than 70% of them have a non-circular shape. According to the present invention, the degree of non-circularity of the cross section can be quantitatively determined.
can be expressed by the irregularity coefficient (D/d)
Ru. Deformation factor (D/d) is the circumscribed biplane of the fiber cross section.
The maximum distance between row lines and the minimum distance between (D) and its two circumscribed parallel lines
(d). Set in the present invention
Each fiber with a non-circular cross section making up the body is preferably
has an anomaly coefficient of at least 1.1. Collection of the invention
The fibers that make up the body can be arranged at any angle perpendicular to the fiber axis.
When cutting at the position, 50% or more of the cross section is
Preferably 45% or more, particularly preferably 40% or more
At least one of the shape and size is not the same. According to the invention, the shapes and/or sizes of
Non-uniform cross sections can be identified by microscopic observation.
can. According to the present invention, the composite fiber of the present invention is further constructed.
Preferably, each fiber comprising
The size of the cross-sectional area changes irregularly and periodically.
are doing. Such a change in the size of the cross-sectional area is due to the
Select 3cm of any single fiber and divide it into 1mm
The size of the cross-sectional area for each interval is measured by microscopic observation.
The average value of the 30 cross-sectional areas ((F)) and its
Find the standard deviation (σ(F)) of the 30 cross-sectional areas and use the following
The coefficient of variation of the fiber cross-sectional area [CV(F)] can be measured from the formula, CV(F) = σ(F)/S(F), and can be expressed numerically using this CV(F).
Ru. Each fiber constituting the composite fiber aggregate of the present invention is
Preferably, the coefficient of variation of the cross-sectional area within the fiber [CV(F)] is
It has a value ranging from 0.05 to 1.0. Further, according to the present invention, cross sections having different sizes
is quantitatively expressed by the following formula, CV(A) = σ(A)/S(A) [where (A) is a
Extract a subassembly of fibers and cut it at any position.
Microscopic observation of the cross-sectional size of each fiber in the plane
The 100 pieces obtained by measuring
It is the average value of the cross-sectional size of the fiber, and σ(A) is the
It is the standard deviation of the cross-sectional area of 100 fibers. ] The fiber cross-sectional area variation coefficient within the aggregate [CV
(A)]. The size constituting the aggregate in the present invention is the same
Fibers with a cross section that is preferably CV(A)
0.05 to 1.5, more preferably 0.1 to 1.5, particularly preferably
is between 0.2 and 1. The composite fiber aggregate of the present invention can be randomly produced from now on.
Extract a subset of 100 fibers and select any
Observe the cross section of each fiber at the specified location using a microscope
In this case, two randomly extracted
At least 50% of the cross section is preferably: 100
(%) [Here, (D/d)i is the larger irregularity coefficient,
(D/d)j indicates the smaller irregularity coefficient. [In the formula, Si is the size of the larger cross-sectional area “mm”] ² ”,
Sj is the size of the smaller cross-sectional area (mm ² ),and
β is the cross-sectional area deviation rate. ] It has a size distribution expressed as . The composite fiber aggregate of the present invention further preferably has:
The cross section of the fiber that appears when observed under a microscope
At least 50 of two cross sections randomly extracted from inside.
(1) with an irregular coefficient deviation rate (α) of at least 2 (%);
have a difference in the shape represented and/or
(2) The cross-sectional area deviation rate (β) is expressed as at least 5 (%).
They have different cross-sectional areas. The composite fiber aggregate of the present invention is perpendicular to the fiber axis.
When cutting at any position, 50% or more of the cross section
above, preferably 45% or more, particularly preferably 40% or more
The top shows at least two different thermoplastic polymer phases.
At least a portion of each is exposed on the circumferential surface of each other's fibers
It was combined side-by-side with the
Both have two blocks, and each block has two blocks.
At least one of the number, shape and size of individual fibers
It is desirable that there be non-uniformity between the two. rhinoceros
The block that was integrated into Dubai Side is a textile
Completely included within the cross section and not exposed on the fiber circumference.
It should be understood as a block that excludes other blocks.
It is. The fibers constituting the aggregate of the present invention meet the above definition.
Therefore, at least one side-by-side combination
Includes at least 50% of the cross section with two blocks
ing. A small group of people combined side by side
The proportion of the cross section with two blocks is based on the above
According to Akira's explanation of the manufacturing method, the macroblend solution
Formation state of melt phase of melt and size of spinneret slits
It is easy to understand that this can vary depending on the choice of
It will be. The number of blocks merged side by side and
is, at least a part of it is exposed on the fiber periphery.
It should be understood as the number of independent blocks. In the composite fiber aggregate of the present invention, each fiber contains
At least two blocks included are each a single block.
may consist of a polymer phase of 1 or 1
at least one other polymer in the matrix of
It consists of a dispersed phase (microblend phase).
You can also do it. Therefore, according to the invention, preferably each
It is proposed that the block consists of a single polymer phase.
The cross-section of the fiber was determined by microscopic observation.
At least one block that appears in the
It forms a boundary line and merges with other blocks,
The at least one block has at least one single block.
a matrix of polymers, and in this matrix
a dispersed phase of at least one other polymer dispersed in
A polymer consisting of is provided. The composite fiber aggregate of the present invention has each of the following definitions.
Average denier () within the fiber aggregate is 0.1 to 400
Denier, more preferably 0.3 to 200 denier, especially
preferably from 0.5 to 100 denier
be done. Average fineness (average denier,
e) is a random subset of 100 lines from the set.
Extract 10 pieces of the body (for convenience, extract 3 pieces)
Good too. When 3 pieces are extracted and when 10 pieces are extracted.
), the fibers of each subassembly
Randomly select one location in the direction of the fiber axis and move in the direction perpendicular to it.
The cross section was photographed using a microscope and approximately
Individual fiber cross-sections can be seen from photographs enlarged 2000 times.
Cut out and weigh the total weight of each section.
Divide by the number of photos, average it, and calculate the value [m(A)]
This is the value converted to de. Therefore, the average fineness within this aggregate is given by the formula:
Calculated based on =K・m(A) [However, m(A) in the formula is the weight of the cut photographic fiber cross section.
quantity average value, K is the denier (de) conversion factor,
Formula K=9×10 ^Five ・It is determined by ρ/γ・δ. Here γ is
The unit area weight (g) of the photo, δ is the area magnification of the photo
ratio, ρ is the specific gravity of the fiber-forming polymer;
are all values expressed in cgs units. ] The elastic fiber of the present invention can be added as an additive to normal fibers.
Used e.g. heat stabilizers, nucleating agents, flame retardants, light stabilizers
Fixing agents, lubricants, matting agents, pigments, plasticizers, thickeners, etc.
It may be added. Various physical property values in the present invention are based on the following measurement methods.
I asked for it. (1) Long period crystals based on row structure
Measurement of X-ray small-angle scattering device (Rigaku Corporation Rotayu)
RU-3H)
2θ is in the range of approximately 2° to 15′, and this range
Find the diffraction angle that shows the peak at Bragg's equation 2d
The long period was determined by sinθ=λ. Note that λ=
1.5418 Å (CuKα) was used. (2) Measurement of degree of orientation (DO) in the fiber axis direction
RU-3H)
The peak of reflection from a specific (h, k, l) surface
Find the position and fix the goniometer at that position.
Ru. At that position, turn the goniometer into an X-ray beam.
180 degrees in a plane perpendicular to (meridian - equator - meridian)
Rotate and write a chart. half price of this chart
Find the width (H, degrees) and calculate the degree of orientation from the formula below.
Ru. Degree of orientation (%) = 180-H/180×100 (3) Measurement of initial elastic modulus The initial elastic modulus is calculated from the stretching curve at the 2% stretching point.
Find the intersection of the tangent line and the tangent line at the 10% extension point.
displacement position (a%) at the intersection, stress
(bg) and denier (Cde) using the following formula
Calculated from. Initial elastic modulus = b/a/100×C (g/de) The stretching curve is calculated by stretching the fiber by 8 cm in the fiber axis direction.
The test length was set to 4 cm, and Tensilon (Toyo Bo
Using a UTM-20 manufactured by Ludwin, the head
It was determined by pulling at a speed of 100%/min. (4) Measurement of elongation It can be read from the elongation curve obtained as above.
It means the elongation at break. (5) Measurement of elastic recovery rate Elastic recovery rate means stretch recovery rate.
Using the Tensilon mentioned above, set the chuck spacing to 4cm.
(trial length is 4 cm), and the head speed is
Stretch at 100%/min to 50%, then immediately
Return to the original state at the same speed while releasing stress.
This was repeated four times. At the time of the fifth pull
Between the chucks at the point when the stress starts increasing from 0
It was calculated from the distance (d/cm) using the following formula. Elastic recovery rate (%) = (1-d-4/4) x 100 (6) Measurement of the number of crimps The number of crimps is determined by cutting a single yarn to 5.5 to 7.5 mm and loosening it.
It is then attached to a paper frame and attached to a crimp elasticity tester.
When the initial load is 2 mg/de, the length is 25 mm.
It was calculated from the number of mountains. Next, the present invention will be explained in detail in Examples. However, the present invention is not limited to these examples.
This goes without saying. Parts are parts by weight.
means. In addition, the physical properties in the examples are approximately 300 denier.
This is the value measured as a fiber aggregate of 1.
The polymers used in these examples are:
It is shown in the following abbreviations. PP: Isotactic polypropylene Hytrel: Polyester elastomer EVA: Polyethylene vinyl acetate copolymer PE: Polyethylene POM: Polyoxymethylene PBT: Polytetramethylene terephthalate
PET: Polyethylene terephthalate Example 1 Elastic fibers were prepared using equipment as shown in Figure 2.
I got it. Isotactic polyp as polymer (b)
Lopyrene (Ube Industries, Ltd.: S115M) 90 parts polymer
(c) Polyester elastomer (DuPont:
Add 10 parts of Hytrel 4056 (melting point 168℃) to the polymer solution.
Blend and mix thoroughly with a V-type blender.
After that, dry it at 140℃ for 3 hours and throw it into hopper 1a.
I entered. While supplying a fixed amount with feeder 2a, 230
An extruder with a diameter of 30mmφ in the temperature range of ~290℃
Melt kneading with Truder (L/D=28) 3a
The gear pump 4a melts the polymer at a rate of 80g per minute.
- is supplied to the die 6 whose temperature is 250℃, and the molding area surface is
The product is 78cm ² rectangular (2cm wide x 39cm long) stainless steel
50 mesh plain woven wire mesh (manufactured by Nihon Kinami Co., Ltd.) Cap
It was discharged from 7. At this time, pass the copper plate 8 through the cap.
A current of 30A (3V) was applied. Also, the base 7 is the die 6
Apply an inorganic adhesive to the parts that come into contact with the
ing. Furthermore, uniform cooling air is supplied to the mouth from the cooling device 11.
Spray onto the shaped area, obtain a fiber bundle 13 and take it off.
The pulling roller 12 pulls at a pulling speed of 6 m/min.
Heat treatment box 1 at an ambient temperature of 150℃
4, perform heat treatment for 30 seconds, and then add cooling water.
1.5 times between roller 15 and roller 16
Cold stretching was performed to obtain an elastic fiber bundle. Various physical properties are shown in the table.
Shown in 1. Examples 2-3 Isotactic polypropylene (Ube Industries
Ltd.: S115M) and polyester elastomer (De
Yupon: Hytrel 4056) by changing the mixing ratio.
An elastic fiber bundle was obtained according to Example 1 except for the following.
Ta. Various physical properties are shown in Table-1. Examples 4-6 Isotactic polypropylene as polymer (b)
(Ube Industries, Ltd.: S115M), ethylene as polymer (c)
Vinyl acetate copolymer (Toyo Soda Kogyo Co., Ltd.)
Lutracene 625) was used to create a polymer chip blend.
Mix thoroughly with a V-type blender and then hopper.
1a, and then the elastic fiber collection according to Example 1.
Obtained a bundle. In addition, the electric current passed to the cap through the copper plate 8
The current was 40A (4V). Physical properties are shown in Table 1.
vinegar. Examples 7-8 Isotactic polypropylene as polymer (b)
(Ube Industries, Ltd.: S115M), unique as a polymer (c)
Viscosity [7] (metacresol used as solvent)
Polymer chip blend with 1.34 nylon 6
After mixing thoroughly with a V-type blender, heat at 140℃.
After drying for 4 hours, it was placed in a hopper 1a. fee
Temperature range of 270 to 300℃ while supplying constant quantity with Dar 2a
Extruder with a diameter of 30mmφ (L/D
=28) Melt and knead according to 3a, and then proceed according to Example 1.
An elastic fiber bundle was obtained. Physical properties are shown in Table 1.
vinegar. Examples 9-10 Isotactic polypropylene as polymer (b)
(Ube Industries, Ltd.: S115M), as a polymer (c)
Polymer using ethylene (Ube Industries, Ltd.: J2522)
Blend the chips and mix thoroughly with a V-type blender.
Then put it into the hopper 1a, and then follow the same procedure as in Example 1.
An elastic fiber bundle was obtained. Physical properties are shown in Table 1.
vinegar. Examples 11-13 Isotactic polypropylene as polymer (b)
(Ube Industries, Ltd.: S115M), thermoplastic as a polymer (c)
Plastic polyurethane elastomer (Uniroyal:
ROYLAR E-85), polymer chips
After blending and mixing thoroughly with a V-type blender,
Dry at 110℃ for 4 hours and put into hopper 1a.
did. Thereafter, the elastic fiber aggregate was prepared according to Example 1.
Obtained. The current passed to the base is 50A (5V).
Ta. Thermoplastic to isotactic polypropylene
Isota by blending polyurethane
The oriented crystals of polypropylene are promoted.
Ru. Figure 8-a is an isocure heat-treated at 150℃ for 30 seconds.
Tactical polypropylene (comparative example 1) fiber
Figure 8-b is a wide-angle X-ray photograph of
The above thermoplastic polyurethane is added to polypropylene.
Fiber blended with 20% tan at 150℃
Wide-angle X-ray image of the product heat-treated for 30 seconds (Example 12)
True. I like that oriented crystals are promoted.
Karu. Various physical properties are shown in Table-1. Examples 14-15 Isotactic polypropylene as polymer (b)
(Ube Industries, Ltd.: S115M), as a polymer (c)
Ester elastomer (DuPont: Hytrel
7246 (melting point 218℃), polymer chip blend
Mix thoroughly with a V-type blender, then heat to 150℃.
After drying for 3 hours, it was placed in a hopper 1a. Below
After that, an elastic fiber bundle was obtained according to Example 1. various
The physical properties are shown in Table-1. Example 16 Elastic fibers were obtained using equipment as shown in Figure 2.
Ta. Polyoxymethylene (Asahi Kasei Kogyo Co., Ltd.) as the polymer (b)
Co., Ltd.: Tenatsuku 5010) 90 parts as polymer (c)
Lyester elastomer (DuPont: Hytrel
Blend 10 parts of 4056) into a V-shaped
After mixing thoroughly with a blender, dry at 140℃ for 3 hours.
It was dried and put into a hopper 1a. feeder
In the temperature range of 190℃ to 210℃ while supplying a constant amount at 2a.
Extruder with a diameter of 30mmφ (L/D=
28) Melt and knead with 3a and then mix with gear pump 4a.
80g of molten polymer per minute is passed through a die at a temperature of 200℃.
6, molding area area is 78cm ² rectangle (2cm
Width x 39cm length) stainless steel 50 mesh plain weave wire mesh
(manufactured by Nippon Kinami Co., Ltd.) was discharged from mouthpiece 7. this
A current of 70A (5V) is passed through the copper plate 8 to the base.
do. Furthermore, uniform cooling air is supplied from the cooling device 11 to the base.
to obtain a fiber bundle 13.
Then, the material was taken off at a taking-off speed of 12 at a rate of 5 m/min.
The fiber bundle was left in an air atmosphere at 150°C for 5 minutes.
Long heat treatment (heater is silicone rubber heater)
(manufactured by Sakaguchi Dentsu Co., Ltd.) and further cooled.
After that, it was stretched 1.5 times at room temperature to obtain an elastic fiber bundle.
Various physical properties are shown in Table-2. Example 17 Polyoxymethylene (Asahi Kasei Corporation: Tenatsuku)
5010) and 70 parts of polyester elastomer (de
Yupon: Hytrel 4056) 30 parts to polymer powder
After blending thoroughly with a V-type blender,
An elastic fiber bundle was obtained according to Example 16. various things
The properties are shown in Table-2. Examples 18-19 Polyoxymethylene (Asahi Kasei Kogyo Co., Ltd.) as the polymer (b)
Co., Ltd.: Tenatsuku 5010), Etile as a polymer (c)
Vinyl acetate copolymer (Toyo Soda Kogyo Co., Ltd.: Wurth)
Using Spiral 625), polymer chips are blended,
Mix thoroughly with a V-type blender and then throw into hopper a.
Thereafter, an elastic fiber bundle was obtained according to Example 16.
Ta. Note that the polyoxymethylene is
Drying was performed at 150°C for 3 hours. Table 2 physical properties
Shown below. Examples 20-22 Isotactic polypropylene (Ube Industries
Co., Ltd.: S115M) and polyoxymethylene (Asahi Kasei Corporation)
Polymer chips using Tenatsuku 5010)
After blending and mixing thoroughly with a V-type blender,
After drying at 150℃ for 3 hours, put it into hopper 1a and
Temperatures between 190℃ and 210℃ while supplying constant quantities with Eider 2a
Extruder with a diameter of 30mmφ in the degree range
(L/D=28) Melt and knead according to 3a, and then
An elastic fiber bundle was obtained according to Example 1. In addition, at this time
The temperature of die 6 is 200℃, and the temperature of die 6 is 200℃, and the temperature of
The current flowing was 50A (4V). Physical properties are shown in Table-2
show. Example 23 Isotactic polypropylene (Ube Industries)
Co., Ltd.: S115M), 50 parts of polyoxymethylene (Asahi
Kasei Kogyo Co., Ltd.: Tenatsuku 5010) 20 copies and Polyester
Tel Elastomer (DuPont: Hytrel
4056) using 30 parts, polymer chips blended,
Mix thoroughly with a V-type blender and then heat at 140℃ for 3 hours.
Dry and put into hopper 1a, then carry out
Elastic fiber bundles were obtained according to Examples 20 to 22. Physical properties
is shown in Table-2. Example 24 The equipment shown in Figure 2 was used. The intrinsic viscosity [η] of the polymer (b) (as the solvent,
Polytetramethane containing 1.0 (0-chlorophenol)
95 parts of lenterephthalate, as polymer (b), poly
Ester elastomer (DuPont: Hytrel
Using 5 parts of 7246 (melting point 218℃), polymer chips
Blend and mix thoroughly with a V-type blender, then 140 ml.
It was dried at ℃ for 4 hours and placed in a hopper 1a. centre
Temperatures between 260℃ and 300℃ while supplying constant quantities with Eider 2a
Extruder with a diameter of 30mmφ in the degree range
(L/D=28) Melt and knead with 3a, gear pump
80g of molten polymer per minute is heated to
Supplied to die 6 at 280℃, molding area area is 78cm ² of
Rectangular (2cm wide x 39cm long) stainless steel 50mm
Shuyu plain woven wire mesh (manufactured by Nippon Kinami Co., Ltd.) discharged from mouthpiece 7
I let it happen. At this time, use copper plate 8 for the cap and use 78A.
A current of (7V) was applied. Furthermore, a uniform cooling air base is formed from the cooling device 11.
The fiber bundle 13 is obtained by spraying it onto the shaped area, and the fiber bundle 13 is obtained.
It was taken off at a rate of 5 m/min by the take-off roller 12. Applicable
Heat the fiber bundle in 200℃ silicon oil (Toray Silicone)
Heat treatment was performed for 10 minutes at a fixed length in SH710 (Co., Ltd.)
After cleaning the silicone oil with n-hexane, 1.3 at room temperature.
It was stretched twice to obtain an elastic fiber bundle. Various physical properties are shown in the table.
Shown in 3. Figure 9-a is before heat treatment in silicon oil.
The above fibers were soaked in monoethylamine (70% water soluble) at 30℃.
Electron microscopy of the surface etched for 30 hours with
It is a mirror photograph (30,000 times), and Figure 9-b is a 200℃ series.
Similarly, fibers are etched after heat treatment in con-oil.
This is an electron micrograph (30,000x) of the surface.
Even before heat treatment, wax structure-like crystals were visible.
After heat treatment, a dense row structure structure is created.
I can see that it is becoming more structured. Examples 25-26 Polytetramethylene terephthalate and polyester
Tel Elastomer (DuPont: Hytrel
Same as Example 24 except that the mixing ratio of 7246) was changed.
An elastic fiber bundle was obtained. Physical properties are shown in Table 3.
vinegar. Examples 27-28 Intrinsic viscosity [η] as the polymer (b) (as the solvent,
Polytetramethane containing 1.0 (0-chlorophenol)
Lenterephthalate, as polymer (c), polyester
Tel Elastomer (DuPont: Hytrel 4056
Melting point: 168℃)
A fiber bundle was obtained. Various physical properties are shown in Table-3. Example 29 The equipment shown in Figure 2 was used. Isotactic polypropylene as polymer (b)
(Ube Industries, Ltd.: S115M) is stored in Hopper 1a.
Polyester elastomer as polymer (c)
(DuPont: Hytrel 4056) at 140℃ for 3 hours
After drying, store in hopper 1b and feed
Ext with a diameter of 30mmφ from dars 2a and 2b
A fixed amount is supplied to the routers 3a and 3b. extor
Temperature range 250-280℃
Melt the extruder 3b at 220-260℃
The polymer is melted in the temperature range of 4 and the gear pump 4
The supply amount of a is 70 parts, and the supply amount of gear pump 4b is 30 parts.
Adjust so that each molten polyurethane is
Ma is led to section 5ab. The state is in the 5ab section.
Contains a mixer (4 elements),
Both components are now mixed. In Fig. 5, there is confusion at part 5ab.
A photograph of the mixed state of both polymers combined is shown. Change
The mixed molten polymer is transferred to die 6 at a temperature of 250°C.
As shown in Figure 4, a further 4 element star is formed.
The take mixer part mixes the molding area.
is 78cm ² rectangular (2cm wide x 39cm long) stainless steel
50 mesh plain woven wire mesh (manufactured by Nihon Kinami Co., Ltd.) Base 7
(Figure 2). The discharge rate is 200g/min.
Ivy. At this time, 30A (3V) is applied to the cap through the copper plate 8.
A current was applied. The part where the cap 7 contacts the die 6
are coated with inorganic adhesive and insulated. Furthermore, uniform cooling air is supplied to the mouth from the cooling device 11.
Spray onto the shaped area, obtain a fiber bundle 13 and take it off.
Pick-up at a pick-up speed of 10 m/min using roller 12
30 seconds in heat treatment box 14 at an ambient temperature of 150°C.
A roller that has been heat-treated and has cooling water passed through it.
Cold-stretched 1.5 times between roller 15 and roller 16 to make it elastic.
A fiber bundle was obtained. Various physical properties are shown in Table-4. Figure 6
A cross-sectional photograph is shown. The white part is polypropylene
The black part is Hytrel 4056. rhinoceros
You can clearly see that it is a du-by-side type. Examples 30-32 Isotactic polypropylene (Ube Industries
Ltd.: S115M) and polyester elastomer (De
Yupon: Since changing the supply amount of Hytrel 4056)
An elastic fiber bundle was obtained in accordance with Example 29. various
The physical properties are shown in Table 4. Examples 33-35 Isotactic polypropylene (Ube Industries
Co., Ltd.: S115M) to hopper 1a, ethylene acetic acid
Vinyl copolymer (Toyo Soda Kogyo Co., Ltd.: Ultrasen)
625) are stored in hopper 1b and exported.
The temperature range of Truder 3a is 240-280℃,
The temperature range of Truder 3b is 190°C to 250°C.
The rimmer was melted. The current flowing to the base is 20A
(2V), and since the supply ratio of each polymer is changed,
Everything else was carried out according to Example 29, and an elastic fiber bundle was obtained.
I got it. Various physical properties are shown in Table-5. Examples 36-38 Isotactic polypropylene (Ube Industries
Co., Ltd.: S115M) as hopper 1a, intrinsic viscosity [η]
(0-chlorophenol as solvent) is 0.71
Polyethylene terephthalate at 150℃ for 5 hours
After drying, store each in hopper 1b, and
The temperature range of Struder 3a is 240-280℃,
The temperature range of Struder 3b is 270 to 300℃, and each point is
The rimmer was melted. The temperature of die 6 is 270℃.
Ivy. Also, the current flowing to the cap is 70A (6.5V).
Ivy. Other conditions vary by changing the supply ratio of each polymer.
All procedures were carried out in accordance with Example 29 except for the preparation of elastic fibers.
Obtained a focusing body. Various physical properties are shown in Table-5. Examples 39 to 41 Equipment as shown in FIG. 2 was used. Polyoxymethylene (Asahi Kasei Corporation: Tenatsuku)
5010) was dried at 150℃ for 3 hours, and then placed in hopper 1a.
Polyester elastomer (DuPont: Hytre)
After drying 4056) at 140℃ for 3 hours, hopper 1b
The temperature of extruder 3a
Range is 190-210℃, temperature of extruder 3b
Melt each polymer at a temperature range of 220-260℃
I let it happen. Die with 50 mesh plain weave wire mesh cap 7
The temperature at No. 6 was 200°C. Also, the electricity that passes to the cap
The current was 60A (5V). At a pulling speed of 10m/min
The fiber bundle 13 is taken up and the fiber bundle 13 is
Perform fixed length heat treatment for 5 minutes in an air atmosphere at 150℃.
Furthermore, after cooling, it is cold-stretched to 1.5 times to form elastic fibers.
I got a body. Various physical properties are shown in Table-6. Examples 42 to 43 Equipment as shown in FIG. 2 was used. Intrinsic viscosity [η] (0-chlorophene as a solvent)
polytetramethylene terephthalene with 1.0
After drying the sheet at 150℃ for 3 hours, place it in hopper 1a.
Polyester elastomer (DuPont: Hytre)
After drying 7246) at 150℃ for 3 hours, hopper 1b
The temperature of extruder 3a
Range is 260-290℃, temperature of extruder 3b
Melt each polymer at a temperature range of 220-260℃
I let it happen. Die with 50 mesh plain weave wire mesh cap 7
The temperature at No. 6 was 280°C. Also, the electricity that passes to the cap
The current was 60A (5V). At a pulling speed of 10m/min
The fiber bundle 13 is taken over and the fiber bundle 13 is
°C in silicon oil (Toray Silicon Co., Ltd.: SH710)
Perform constant heat treatment for 10 minutes and wash with n-hexane.
Afterwards, it was stretched 1.5 times at room temperature to obtain an elastic fiber bundle.
Various physical properties are shown in Table-6. Example 44 Isotactic polypropylene (Ube Industries)
Co., Ltd.: S115M) 60 parts and polyester elastomer
(DuPont: Hytrel 4056) 40 parts polymer
Blend the chips and mix thoroughly with a V-type blender.
After that, dry at 140℃ for 3 hours and store in hopper 1a.
I stored it. Furthermore, isotactic polypropylene
(Ube Industries, Ltd.: S115M) is stored in hopper 1b.
Ta. The following steps were carried out according to Example 29 to bundle elastic fibers.
I got a body. A cross-sectional photograph of the elastic fiber is shown in FIG.
The polymer blend part is a part with fine shading.
The white part is made of isotactic polypropylene.
It is. Various physical properties are shown in Table-7. Examples 45-46 Everything was the same as Example 44 except for changing the proportion of each polymer.
Elastic fibers were obtained in the same manner. Various physical properties are shown in Table-7. Comparative example 1 Isotactic polypropylene (Ube Industries
Co., Ltd.: S115M) is stored in hopper 1a, and the following
After that, an elastic fiber bundle was obtained according to Example 1. initial
It has a very high modulus of elasticity and low elongation, making it impractical. various
The physical properties are shown in Table-8. Comparative Example 2 Polyoxymethylene (Asahi Kasei Corporation: Tenatsuku)
5010) only at 140℃ for 3 hours, then hopper 1
a, and thereafter bundled elastic fibers according to Example 16.
I got a body. High initial elastic modulus and low elongation. various things
The properties are shown in Table-8. Comparative Example 3 Intrinsic viscosity [η] (0-chlorophene as a solvent)
polytetramethylene terephthalene with 1.0
After drying the sheet at 150℃ for 3 hours, store it in hopper 1a.
Then, according to Example 24, an elastic fiber bundle was obtained.
However, the ER is low at 65%, and the low structure
The structure of is considered to be incomplete. Physical properties are shown in Table-8
show. Examples 47-50 Polybutene-1 (SCIENTIFIC
POLYMER PRODUCTS, INC.), polymethyl
-Pentene-1 (Mitsui Petrochemical Industries, Ltd.: TPX
DX-845), nylon 6 with intrinsic viscosity [η] = 1.34
and polyester elastomer as polymer (c)
(DuPont: Hytrel 4056), ethylene vinyl acetate
Nil copolymer (Toyo Soda Kogyo Co., Ltd.: Ultrasen)
625) to blend the polymer chips and make a V-shaped block.
Thoroughly mix it with a render and use an extruder with a diameter of 30mmφ.
Using a strudder, obtain a fiber bundle and heat treat it.
An elastic fiber bundle was obtained. Table 9 physical properties
Shown below. Here, CV(A) is the coefficient of variation of fiber cross-sectional area within the aggregate,
CV(F) is coefficient of variation of fiber cross-sectional area, CN is crimp number
(ke/inch), ER is elastic recovery rate, EL is elongation,
IM is the initial elastic modulus.

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【table】 [Brief explanation of drawings]

FIG. 1-a is a schematic diagram of a wire mesh as an example of a mesh die used in manufacturing the elastic fiber of the present invention. FIG. 1-b is a sectional view of FIG. 1-a.
FIG. 2 is a sketch of an example of an apparatus suitable for producing the elastic fibers of the present invention. FIG. 3 is a general schematic diagram of an arbitrary cross-section of a mesh die used in the process of the present invention. FIG. 4 is a cross-sectional view of an example of a die used for manufacturing the elastic fiber of the present invention. FIG. 5 is a cross-sectional photograph of the composite molten polymer in Example 29 when it was solidified just before reaching the mouthpiece. FIG. 6 shows a cross-sectional photograph of the composite elastic fiber in Example 29. FIG. 7 shows a cross-sectional photograph of the elastic fiber combined with the polymer blend in Example 44. The polymer blend area is a finely shaded area, and this is a cross-sectional photograph of a composite fiber made of a polymer blend and an isotactic polymer (white area). Figure 8-a
shows a wide-angle X-ray photograph of the fiber in Comparative Example 1.
FIG. 8-b shows a wide-angle X-ray photograph of the fiber in Example 12. FIGS. 9-a and 9-b show electron micrographs of the elastic fibers of Example 24 whose surfaces were treated with monoethylamine. The crystalline state of the wax structure is often observed.

Claims (1)

[Scope of Claims] 1. (a) An elastic fiber made of two or more thermoplastic polymers, (b) At least one of the thermoplastic polymers is a wax.
(c) at least one other of the thermoplastic polymers has crystallinity capable of forming a lamellar crystal, and (d) ) The elastic fiber has a row structure (Row
(e) the long period of the crystal based on the row structure of the elastic fiber is 80
~400Å, (f) The degree of crystal orientation in the fiber axis direction of the elastic fiber is
(g) the elastic fiber has an elastic recovery (ER) after 50% elongation of at least 70%, as defined in the text of the specification; (h) the initial elastic modulus of the elastic fiber is between 0.5 and 15 g/de; (i) An elastic fiber characterized in that the elastic fiber has an elongation of 200 to 700%.