JPH0214053A - Cut pile warp-knitted fabric and production thereof - Google Patents

Abstract

PURPOSE:To obtain a cut pile warp-knitted fabric having excellent raising performance, feeling and processability by forming short cut pile with a thermoplastic polymer filament yarn and forming a long cut pile with a crimped polyester filament yarn. CONSTITUTION:The pile part 2 is formed by densely collecting a number of conjugate yarns 3 consisting of a short cut pile 4 and a long cut pile 5. The short cut pile is composed of a thermoplastic polymer filament yarn A having a single fiber fineness of >=3 denier and essentially free from crimp and the long cut pile is composed of a crimped polyester filament yarn B having a single fiber fineness of <=3 denier. The ground part 1 is constructed of a filament yarn having a residual elongation of >=15%.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cut pile warp knitted fabric that has excellent napping properties and texture, and is also excellent in formability.

[Prior art]

Cut pile warp knitted fabrics with different pile lengths are used for luxury goods, such as car seat banks,
It is widely used as an outer covering material for door trims, as an outer covering material or inner covering material for musical instruments, bottles, jewelry boxes, etc., and for interior and decorative purposes such as chair upholstery and interior wall covering material.

In these applications, it is important that the cut pile warp knitted fabric not only has a good texture when touched, but also has good napping properties and has good formability when formed into a predetermined shape. It is strongly required that it be in good condition. Napped property refers to the property that the pile does not become tangled, always returns to its original shape even when pressed, and that the top end of the pile can always be kept open. It also has formability. This refers to the property of maintaining the napping properties before processing without breaking the pile or producing wrinkles at the corners when formed into a predetermined uneven shape.

In conventional cut pile warp knitted fabrics, acrylic filament yarn or rayon yarn is used for the long pile, and polyamide yarn or polyester yarn is used for the short pile. However, this conventional cut pile warp knitted fabric does not sufficiently exhibit the characteristics of napping and processability required for the above-mentioned high-end product applications, and there is still room for improvement.

Furthermore, acrylic filament yarns and rayon yarns not only have the above-mentioned problems with raised properties, but also have poor abrasion resistance and fatigue resistance, and these drawbacks have been particularly noticeable in automobile seat back applications. In addition, the dyed surface has the problem of being weak in sunlight fastness and discoloring easily, and in particular, because the dyeing temperature cannot be raised for rayon yarn, it is difficult to obtain the effect of different color dyeing with synthetic fibers used for short piles. was there.

[Problem to be solved by the invention]

An object of the present invention is to solve the above-mentioned conventional problems and provide a cut pile warp knitted fabric that has excellent napping properties and texture as well as excellent workability, and a method for producing the same.

Still another object of the present invention is to provide a cant pile warp knitted fabric that has good sunlight fastness, abrasion resistance, fatigue resistance, etc. and also allows dyeing in different colors, and a method for manufacturing the same.

[Means to solve the problem]

The cut pile warp knitted fabric of the present invention that achieves the above object is a warp knitted fabric in which a composite yarn consisting of multiple types of filament yarns exhibits cut piles having different lengths, and the shorter one of the cut piles has different lengths. The longer one is composed of thermoplastic polymer filament yarn A having a single fiber fineness of 3 denier or more and is substantially uncrimped, and the longer one is composed of a polyester crimped filament yarn B having a single fiber fineness of 3 denier or less, and these The yarns A and B form the composite yarn, and the ground portion of the warp knitted fabric is composed of filament yarns having a residual elongation of 15% or more.

In addition, the manufacturing method of this cut pile warp knitted fabric has a birefringence Δ
Highly oriented undrawn or incompletely drawn polyester yarn with n in the range of 0.05 to 0.10 is drawn and false-twisted at a temperature below the glass transition point, and then reheated to obtain a single fiber fineness of 3 denier or less. This polyester crimped filament yarn B and a thermoplastic polymer filament yarn without crimps having a single fiber fineness of 3 deniers or more and having a boiling water shrinkage rate higher than that of the polyester crimped filament yarn B. Form a composite yarn from A, make this composite yarn into a pile part,
A pile warp knitted fabric is knitted using a thermoplastic polymer filament yarn having a boiling water shrinkage rate of 20% or more as a ground part, and the pile of this pile warp knitted fabric is cut and then dyed. be.

In the present invention, the yarns constituting the cut pile of the warp knitted fabric are based on composite yarns made of multiple types of thermoplastic polymer filament yarns, and are configured to have different pile lengths. .

The shorter cut pile is made of non-crimped thermoplastic polymer filament yarn Δ with a single fiber fineness of 3 deniers or more, and plays an important role in stretching the entire cant pile and providing N. . For this reason, 2. The single fiber fineness of the cut pile must be 3 deniers or more, preferably 5 deniers or more. However, if the single fiber fineness is made too thick, it will become too hard, so it is desirable to limit the single fiber fineness to 10 deniers. The thermoplastic polymer material 2 is not particularly limited, and may be polyamide, polyester, etc., but polyamide is particularly preferred.

On the other hand, the longer cuffed pile is a polyester filament with crimps of single fiber fineness of 3 deniers or less] Yarn B
It is thinner than the shorter cut pile mentioned above. The longer cut pile has its upper end extending further in the E direction than the shorter cant pile, and plays a major role in determining the texture. Therefore, it is important that the single fiber fineness is 3 deniers or less and that it has crimps, and only then can it give a footy feel and bulk. Maybe,
This longer cut pile is combined with the shorter, thicker cuffed pile to add appropriate tension and elasticity at the waist, further emphasizing the soft texture.

The fineness of such single fibers is more preferably 7 or 2.
It is best to make it less than denier. However, if it is too thin, it will affect the pilaster, so it is desirable to set the lower limit to 0.4 denier.

In addition, the longer cant pile is made of polyester,
And by having crimps, the shorter thicker casottoba
Coupled with the stiffening effect of the pile, the cant pile provides good napping properties to the entire cant pile. In other words, the cut pile is not tangled, the hair is handled well, and the upper end of the cut pile is always maintained in an open state. It also makes it easier to restore the original posture even when pressed. In order to make this effect even better, the above crimp is used, and the torque twist number is 2 times 150c+
++ or less, it is desirable that the expansion/contraction/elongation rate be relatively low, such as 0°1 to 5%.

Here, the torque twist number is 2 mg/twist at the center of the sample yarn 'Im.
When a small load D is hooked, both yarn ends are aligned, the yarn is folded in half, and then hung, the number of rotations at which the suspended small load rotates is determined as the torque twist number.

In addition, in the present invention, the thermoplastic polymer filament yarn used for the gland part must have a residual elongation of 15% or more. It is easy to deform during processing, and the original soft texture can be maintained without changing the napping properties of the curly pile. In this way, in order to make the filament yarns constituting the ground part of the final cut pile warp knitted fabric have a residual elongation of 15% or more, boiling water shrinkage is used as the raw yarn before dyeing as described below. It is preferable to use a highly shrinkable filament yarn having a shrinkage ratio of 20% or more.

FIG. 1 is a vertical sectional view schematically showing a cut pile warp knitted fabric according to the present invention.

1 is the ground part of the warp knitted fabric, and 2 is the pile part. This pile portion 2 is made up of a set of cut piles whose tips have been cut, and is formed by densely gathering together a large number of composite yarns 3 consisting of a short carnoped pile 4 and a long cut pile 5. In the figure, only one cant pile 4 and 5 are shown for the sake of simplicity, but the composite yarn 3 is actually composed of an aggregate of a large number of multifilament yarns.

In the present invention, the length difference that the longer cut pile should have with respect to the shorter cut pile is not particularly limited, but preferably has the above-mentioned soft texture and napping property. In order to further emphasize this, it is desirable that the amount be within the range of 3 to 10% of the length of the longer cut pile.

In the present invention, the shorter cut pile is not particularly limited as long as it is made of a thermoplastic polymer, but for example, if a cationic dyeable polyester filament yarn is used as the shorter cut pile, the shorter cut pile It can be dyed more easily or more deeply than the longer cut pile. As a result, the inside of the napped portion becomes a dark color, and the entire product has a deep color that gives it a luxurious feel. Such a different dyeing effect can be similarly obtained when polyamide yarn is used as a short cut pile.

The method for producing the cut pile warp knitted fabric of the present invention described above is as follows: As the thermoplastic polymer filament yarn to form the shorter cant pile described above, the thermoplastic polymer filament yarn is uniformly stretched and has substantially no crimp. In addition, it is preferable to use filament yarn having a single fiber fineness of 3 deniers or more. The thermoplastic polymer filament yarn desirably has a boiling water shrinkage rate in the range of 4 to 15%.

In addition, the polyester crimped filament yarn B to be made into the longer cut pile has a birefringence Δn of 0.05 to 0.10.
A highly oriented undrawn or incompletely drawn polyester yarn in the range of 100 to 100% is stretched and false-twisted at a temperature below the glass transition point, and then reheated to obtain a crimped yarn with a single fiber fineness of 3 deniers or less. do. Birefringence Δn is 0.05
~0.10, highly oriented undrawn yarn (POY) obtained by ultra-high speed spinning, incompletely drawn yarn obtained by stretching undrawn yarn at a low ratio, etc. can be preferably used. In particular, highly oriented undrawn yarn (POY) is suitable as a starting yarn for producing the above-mentioned crimped yarn.

The method of stretch false twisting is a sheet-twisting process during stretching, in which the false twisting process of heating, heat setting below the glass transition point, and untwisting is performed simultaneously while stretching, or the method of stretching once below the glass transition point. After stretching, the sheet may be stretched and then subjected to a false twisting process of heating to a temperature below the glass transition point (heating at a temperature below the glass transition point) and untwisting. However, in terms of the uniformity of the obtained yarn quality and yarn processability, the former method of drawing and twisting is more preferable. The number of false twists in this stretch false twisting process is not particularly limited, but is 1500, which is commonly used.
The range of ~5000 times/m is preferable. Further, the false twisting speed is preferably 100 to 900 m/min.

The temperature at the time of reheating is preferably a temperature higher than the glass transition point, more preferably a temperature higher than the softening point. With this reheating cent, the boiling water shrinkage rate is 3% or less, the torque twist is 2 times 150cm or less, and the expansion/contraction rate is 0. It is preferable to adjust it within the range of 1 to 5%.

The boiling water shrinkage rate that this polyester crimped filament yarn B should have is the thermoplastic polymer filament yarn A described above.
The difference should preferably be in the range of 4 to 10%.

Furthermore, the crimped yarn obtained by the above-mentioned drawing and false twisting process is characterized in that although it is a false twisted yarn, it has almost no processing deformation in its cross section. Therefore, most of the luster of the yarn is maintained.

In the present invention, two types of yarn A prepared as described above,
B is made into composite yarn C, which is used as the raw yarn for the pile portion of the warp knitted fabric. When making this composite yarn, it is preferable to perform an interlacing treatment using an air nozzle or the like, if necessary.

FIG. 2 shows a process for manufacturing such a composite yarn C.

In this figure, 1) is a package of uniformly drawn thermoplastic polymer filament yarn such as polyester or polyamide, and 12 is a package wound with highly oriented undrawn or incompletely drawn polyester yarn. The raw yarn released from the package No. 12 is heated and untwisted by the twister 15 while being stretched between the feed roller 13 and the delivery roller 16, and the heating area on the upstream side thereof is heated and untwisted by a heater at a temperature below the glass transition point. The yarn is heat set at step 14 and untwisted at the downstream side to become a crimped yarn. Next, the yarn is reheated between the delivery rollers 16 and 18 by the heater 17 at a temperature higher than the softening point, and becomes the crimped yarn B as described above. The raw yarn A of the package 1) is combined with this crimped yarn B, and the combined yarn is subjected to air entanglement treatment by an air nozzle 19 between a delivery roller 18 and a relaxation roller 20, and the composite yarn is C becomes package 2
It is rolled up to 1.

On the other hand, in the present invention, the thermoplastic polymer filament yarn used as the ground yarn of the ground portion of the bail warp knitted fabric omits the reheat setting in the stretch false twist processing method for producing the above-mentioned polyester crimped filament yarn B. It is recommended that the product be manufactured using the following process. The crimped yarn obtained by omitting reheat setting in this way can have an extremely high boiling water shrinkage rate of 20% or more, and as a result, even after being subjected to dyeing processing, the crimped yarn has no residual elongation. can be increased to 15% or more.

FIG. 3 shows the process of manufacturing such a filament yarn for the ground yarn of the ground section.

In this figure, 22 is a package wound with highly oriented undrawn polyester yarn or incompletely drawn polyester yarn. The raw yarn released from this package 22 is transferred to the feed roller 23
and the delivery roller 26 while being heated and untwisted by the twister 25, the heating area on the upstream side is heat set by the heater 24 at a temperature below the glass transition point, and the yarn is untwisted on the downstream side. This creates a crimped yarn for the ground yarn. This crimped thread is then wound into a package 27.

The composite yarn C and the crimped yarn prepared as described above are knitted into the pile part and the ground part of a pile warp knitted fabric, respectively, and then the pile of the pile warp knitted fabric is subjected to a force of 7 toes. The cut pile warp knitted fabric of the present invention can be obtained by subjecting the cut pile warp knitted fabric to heat treatment such as dyeing.

When the pile warp knitted fabric is canted, the length of the cut pile is the same for both the thermoplastic polymer filament yarn A and the polyester crimped filament yarn B at that point.

However, due to heat treatment such as dyeing processing, a shrinkage difference occurs between the two yarns, and the former yarn A becomes shorter, and the latter yarn B becomes longer.

In addition, the ground yarn in the ground part has a high shrinkage, which has the effect of improving the density of the cut pile part.

〔Example〕

A 75-denier, 36-filament polyester highly oriented undrawn yarn (POY) with a birefringence Δn of 0.08 was stretched and false-twisted at a setting temperature of 70°C, a stretching ratio of 1.8 times, and a number of false twists of 3400 times/m. Overfeed rate 2%, cent temperature 180℃, boiling water shrinkage rate 1.5
%, and a polyester crimped filament yarn B having an elongation rate of 1.0% was obtained. This polyester crimped filament yarn B has a polyamide filament yarn A of 30 denier, 6 filaments, and a uniformly drawn polyamide filament yarn A with a boiling water shrinkage rate of 8%.
were pulled together and subjected to air entanglement treatment using compressed air at a pressure of 3 kg/aj to produce composite yarn C.

On the other hand, a highly shrinkable polyester crimped filament yarn of 150 denier and 48 filaments with a boiling water shrinkage rate of 25% was used as the ground yarn for the ground section, and the above composite yarn C was used for the pile section (the pile was made with a 3mow ball sinker). Used as the yarn of
A warp knitted fabric of pole knitting was knitted at 0 threads/inch.

Next, the pile portion was cut to a length of 2.5 nn from the ground portion. Both yarns A in composite yarn C at this point
, B had the same cut length for both.

Next, about the warp knitted fabric after the pile cutting described above, 98
A cut pile warp knitted fabric for molding was produced by subjecting it to ℃ relaxation treatment and dyeing.

In the resulting cut pile warp knitted fabric, the polyamide filament yarn A in the pile portion shrinks and becomes shorter than the polyester crimped filament yarn B, and the difference in shrinkage between the two is greater than that of the polyamide filament yarn A. The average was 8%.

In addition, the cut pile had no mutual entanglement at all, the tip part was neatly opened, and even when pressed, it returned to its original opened state. Furthermore, it felt extremely soft to the touch, had the appropriate sliminess of polyamide, had a high gloss shine, and had the appearance of high-quality animal hair.

Furthermore, the shorter polyamide filament yarn A was dyed darker than the longer polyester crimped filament yarn B, giving it a deep and luxurious appearance.

Next, a thin plastic plate is attached to the back of this fabric to form a composite, which is then heated at 130°C as an outer covering material for a sheet bank.
Vacuum formed. The moldability at this time was extremely good, with no pile damage or wrinkles, and the original napping properties and texture were maintained.

〔Effect of the invention〕

As mentioned above, the cut pile warp knitted fabric of the present invention has good napping properties and opening properties, does not cause tangles in the cut pile, and quickly returns to its original opened state even when pressed. It can exhibit certain characteristics.

Furthermore, even when molded, the raised properties and texture of the cut pile are not impaired, and it has excellent workability.

In addition, since the shorter cut pile is made of thermoplastic polymer filament yarn, and the longer cut pile is made of polyester crimped filler, it is possible to easily obtain a different dyeing effect. , it becomes easy to get a sense of luxury.

Similarly, compared to conventional acrylic filament yarns and rayon yarns, it has excellent sunlight fastness, abrasion resistance, and re-fatigue resistance.

Furthermore, according to the manufacturing method of the present invention, a cut pile warp knitted fabric having the above-mentioned features can be easily obtained.

[Brief explanation of the drawing]

Fig. 1 is a model diagram showing the cant pile warp knitted fabric of the present invention, Fig. 2 is a manufacturing process diagram of the raw yarn used in the pile part of the same vale warp knitted fabric, and Fig. 3 is the ground part of the same. It is a manufacturing process diagram of the raw yarn. 1...Gland part, 2...Pile part, 3...Cadpa il, 4...Shorter cant pile, 5...
Longer cut pile 2. F...Thermoplastic polymer filament yarn, B...Polyester crimped filament yarn, C...Composite yarn, 13,16.18,23゜26
...Delivery roller, 14.17.24...Heater, 1.5.25...Twister, 19...Air nozzle. Agent Patent Attorney Nobuo Ogawa −

Claims (6)

[Claims] (1) A warp-knitted fabric in which composite yarns consisting of multiple types of filament yarns exhibit cut piles with different lengths,
The shorter one of the cut pile is made of substantially uncrimped thermoplastic polymer filament yarn A having a single fiber fineness of 3 denier or more, and the longer one is composed of a polyester crimped filament yarn B having a single fiber fineness of 3 denier or less. It consists of
These yarns A and B form the composite yarn, and the ground portion of the warp knitted fabric is composed of filament yarns having a residual elongation of 15% or more. (2) The cut pile warp knitted fabric according to claim 1, wherein the thermoplastic polymer filament yarn A is a polyamide yarn. (3) The cut pile warp knitted fabric according to claim 1, wherein the polyester crimped filament yarn B is a cationically dyeable polyester yarn. (4) Highly oriented undrawn or incompletely drawn polyester yarn with birefringence Δn in the range of 0.05 to 0.10 is stretched and false-twisted at a temperature below the glass transition point, and then reheated to form a single A polyester crimped filament yarn B having a fiber fineness of 3 deniers or less is obtained, and a thermoplastic polymer having a single fiber having a boiling shrinkage rate higher than that of the polyester crimped filament yarn B and having no crimps and having a fiber fineness of 3 deniers or more is obtained. A composite yarn is formed from the combined filament yarn A, this composite yarn is used as a pile part, and a pile warp knitted fabric is knitted using a thermoplastic polymer filament yarn having a boiling water shrinkage rate of 20% or more as a ground part, A method for manufacturing a cut pile warp knitted fabric, which comprises cutting the pile of the pile warp knitted fabric and then dyeing it. (5) The polyester crimped filament yarn B used for the pile warp knitted fabric has a boiling water shrinkage rate of 3% or less and a stretching/elongation rate of 0.
5. The method for producing a cut pile warp knitted fabric according to claim 4, wherein the torque is 1 to 5% and the number of twists is 2 twists/50 cm or less. (6) A crimped yarn obtained by drawing and false twisting a highly oriented undrawn yarn or incompletely drawn polyester yarn with a birefringence Δn in the range of 0.05 to 0.10 at a temperature below the glass transition point is ground. 5. The method for producing a cut pile warp knitted fabric according to claim 4, wherein the cut pile warp knitted fabric is used as a filament yarn of a section.