JPS5836213A - Crimp nylon-6 continuous filament - Google Patents

Abstract

A textured nylon-6 continuous filament is characterized by the absence of a spherulitic ring structure along the periphery of the cross section thereof when the cross section is viewed under polarized light.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention generally relates to knitted, spun, twisted, and double yarns. More particularly, the present invention relates to crimped continuous nylon-6 filaments.

Most of the knitted fabrics require two important functions, namely protection and thermal insulation, both of which can be satisfied by the sufficient bulkiness of the product. In general, bulky products are manufactured from filaments, since the basic component of any knitted fabric is filaments.

For many years there has been a focus on texturing and crimping synthetic fibers, especially synthetic fibers and filaments from polyamides such as nylon-6, to impart high bulk to the fibers and filaments. Efforts have been made to expand and improve the invention of crimped continuous nylon.
6 filaments.

The following are recent conventional techniques known to the inventors.

(1) U.S. Patent No. 3.1 of Breen et al.
No. 86,155 (b) also has a random number O1 between the reversals of the 8 and 2 twist portions (sumb) throughout its length.
1 roll (c) 2 random mowns of 1 inch or more with a random continuously varying angle of twist along its length
Discloses a single-component synthetic organic filament, such as a nylon-6 twine, having an average twist angle of at least 5 degrees, at least one 8-turn and at least one 2-turn in 1 inch m, with an average twist angle of at least 5 degrees.

(tjJ--Martin et al. U.S. Patent No. 4
．． No. 096.226, U.S. Patent No. 3 to Plain et al.
18 <S, No. 155, discloses the production of crimped nylon-6 filaments, although the method of Marten is an integrated method as opposed to the play method; (a) Melt spinning axis) Spun filament at a draw ratio such that the drawn filament exiting the drawing knee has an elongation of 20-35%) OI! The step of texturing the drawn filament using the Kiki Jet method at a speed of 800-s, o-o-min/min, and a filament O temperature of 50-180° C. before texturing is immediately and continuously carried out.

(3) U.S. Patent No. 3.97 by Okada et al.
No. 5,484 is U.S. Patent No. 4.096 to Marten et al.
．． crimped nylon similar to the filaments disclosed in the plained U.S. Pat.
6 filament production is disclosed. Melamide filaments of non-circular cross section are melt spun, cooled, and treated with oil. The filament was then passed through a feed roll having a circumferential speed of about 200 m/min.

Contact angle: 80°~160@, surface temperature: about 170s~
The sample is allowed to pass while being brought into contact with a heating element maintained at a temperature in the range of 250°C. thereby heating one side of the filament,
It is then stretched and passed through a steam jet crimper (steam j@tcrimp@r) which supplies steam at a temperature in the range of about 200-650°C.

(4) Te1jin (Te1jin Lim1tecl,
GB Patent No. 1,565.007 of ) Nylon-6 multifilament yarn having an internal microstructure characterized in that each filament has a predetermined ratio of R-type crystals combined with α-cap crystals. is disclosed. In particular, each of the individual filaments of the thread has a birefringence of at least 0.045
, a maximum denier of 0.8, and an X-ray diffraction intensity ratio that satisfies the 411F equation.

When observing the cross section of the above Twinment product under polarized light,
A unique spherulite ring structure (gphe
It is stated that there is no structure without a ruritic ring (5 structures). The spherulite ring usually has a diffuse transition to the non-spherulite core. The depth of the spherulite ring usually varies from about 10 to about 20 microns.

When observing the cross section of a real WAO crimped N4-6 continuous filament under polarized light, it is shown that the spherulite ring structure does not exist in a round shape, which is difficult to suggest using conventional technology. do not have. Due to the lack of such a spherulite ring structure, the filaments of the prior art are much more lustrous than those available under the same conditions. This allows textile manufacturers to add bulk and coverage to fibrous structures such as carpets without losing any of their luster.

In order to provide knitted fabric fibers that can increase the bulk and coverage of manufactured fibrous structures without any grains that sacrifice luster, the present invention provides a fabric that, when viewed in cross-section under polarized light,
An object of the present invention is to provide a crimped nylon-6 continuous filament characterized by the absence of spherulite ring structures along the periphery of its cross section.

In order to provide a more complete understanding of the present invention, including the principal objects and benefits set forth above, the following detailed description of the preferred embodiments is provided by reference. This detailed description should be read in conjunction with the accompanying drawings.

Figure 1: 2″ of prior art crimped nylon-6 continuous filament showing unique spherulite ring structure along the circumference of the cross-section
') is shown.

FIG. 2 shows two cross-sections of a crimped nylon-6 continuous filament of the present invention showing the complete absence of the spherulitic ring structure characteristic of the prior art filament shown in FIG.

Now a! Viewed on EIK, Figure #11 shows a prior art available crimped nylon-6 continuous filament 1 shown in two cross-sections as viewed microscopically under polarized light. The unique spherulite 112 has a cross-sectional circumference of 1iKf6
observed. In addition, the 0 spherulites 112, in which small particles 4 of a matting agent such as titanium dioxide can be seen in the cross section, cannot be observed under normal conditions, but many individual partial spherulites 3 can be observed under polarized light. It consists of The filament shown here has a deformation ratio of about 2-3, i.e. its shape is usually "trilobal".
al) J.

A first-order method is used to determine the deformation ratio and the presence or absence of a spherulite ring structure. Place the filament or yarn sample in a suitable embedding medium.

Cut a thin section with a microtome. Take a microscopic photo of this part, measure the deformation ratio (MR), and use
Then, calculate using the following formula (where %DO=diameter of the circumscribed circle to the cross section D1=diameter of the inscribed circle to the cross section).

Determine whether any ambient terms are present or not by visually observing the area under polarized light (phase contrast or dark field microscopy may also be used). You can get it at

FIG. 2 shows an embodiment 5 of a crimped nylon-6 continuous filament of the present invention shown in two cross-sections as viewed microscopically under polarized light. As shown in No. 6, no spherulites are observed around the cross section.

Small particles of matting agent such as titanium dioxide in the cross section 4
can be seen. The filament shown here has a deformation ratio of about 2-3 as discussed above, i.e., its form is commonly referred to as a "trilopal".

Of course, the presence of a matting agent such as titanium dioxide in the filaments of the present invention is not essential. In fact, when the present filament does not contain substantially any matting agent,
The same benefits and benefits are obtained over conventional techniques. Moreover, although deformation ratios of about 2 to 6 are advantageously used, the filaments of the present invention may have other cross-sectional morphologies as well, providing the same advantages over the prior art. is observed. That is, the filaments of the present invention contain the same degree of crimp, or the same amount of matting agent % in an amount that is substantially less than or equal to the saturation amount of matting agent, as another counterpart of the prior art having the same cross-sectional morphology. The filaments of the present invention have significantly higher gloss when compared to filaments of the present invention, both visually and by any number of standard optical methods known to those skilled in the art.

As understood by KFi, the filaments of the present invention, which do not contain substantially any matting agent, are considered to be of very high gloss. If gloss is not desired, a matting agent known to those skilled in the art, 111, can be used.
These include not only the usual non-pigmenting matting agents and fillers, such as titanium dioxide, zinc sulfide % calcium sulfate, glass particles, etc., but also color-poisoning matting agents.

Such matting agents can be added to the molten nylon-61 compound during extrusion and spinning, or organic and inorganic agents can be added to the nylon-6 polymer in chip form to color the nylon-6 polymer in the dyeing operation before extrusion and spinning. Includes pigments and dyes. When titanium dioxide is used, it is advantageous to contain less than about 0.11% by weight.

The crimped nylon-6 continuous filaments of the present invention advantageously have a tank loft of at least 8% and a denier of at least 5. These conditions make it particularly suitable for use in the production of many of the textile structures desirable on today's market. The bulkiness of the tank is initially 0.00059/
dtex(Lx) and 0.09 g/dtex(Ll
) The bulkiness of the tank, determined by measuring the change in length of the thread treated with boiling water under two loads, is calculated by using the following formula: More particularly advantageous results are obtained when the crimped nylon-6 continuous filaments of the present invention have a deformation ratio of about 2-3 and a denier of about 5-25. Under these conditions, use of the filaments of the present invention results in carpets with notable characteristics.

When observing a cross section under polarized light, the circumference of the cross section Kf&
In addition to exhibiting no spherulitic structure, the crimped nylon-6 continuous filament of the present invention with a denier of at least 5 has been found to have the morphological characteristics of a single tatami. In other words, the ratio of R-form nylon-6 to α-form nylon-6 is non-thermal! Vh -L9A, measured on undyed, crimped filament material, at least 1 to 1, often about Vh -L9A. This is compared to the α-form 1 of the r-form to the prior art products available under the same processing conditions.
It is comparable to a ratio of about 4 to 4 degrees to 1. However,
After the crimped filament material wire of the present invention is heat set, the α form becomes the main one. Such phenomena clearly demonstrate that a high proportion of the complete filament structure of the present invention is heat-set 9 re-aligned, thereby increasing the heat-setting efficiency of the filaments obtained with prior art products. In order to measure the crystal ratio related to the above,
The IJ equitorial X-ray diffraction pattern is measured and the 2θ values between 12° and 30° are continuously recorded.

α crystal form 11 has a peak at 2θ = 20.0° to 20.5', and the others are at 2θ = 23.2' to 24.0.

The relative predominance of a particular crystalline form can be determined by visual inspection of the zero curve, in which the pseudo-r form has a single peak at approximately 1=21.2°. R-form nylon
Such products of the present invention having a ratio of α-form nylon-6 of 6 to α-form nylon-6 may be used when substantially no matting agent is contained, or when approximately 0 matting agent, such as titanium dioxide, is present.
．． It is particularly desirable when present in amounts up to 11% by weight. However, the bulkiness of the tank as mentioned above is at least 8% for main fishing.
, a deformation ratio of about 2 to 3 is very advantageous.

Any filament of the invention may be assembled, mixed together with other filaments of the invention, and
(also a) used in the form of a multifilament yarn which may be twisted, using standard techniques familiar to those skilled in the art;
Carpets, upholstery and other such textile structures with distinctive features can be built.

The invention, including its objects and benefits, will be best understood by referring to the following embodiments.

Example 1 The specific viscosity measured in 96-98% sulfuric acid was 2669.
, 335 g/divide of nylon-6 chips containing less than 0.01% titanium dioxide to form 99 filament yarns, each containing 9 filaments.
Spun into two O# spinnerets with nine irregularly shaped holes at multiple temperatures of 265''.

The spun filaments are cooled with a cross-flow of air at approximately 12° C. and are essentially water-free.
A smoothing treatment was carried out with an oil spin finish consisting of fV alcohol. Pre-tension the fiber to 1.5
% and preheated to 45°C, stretched 3.25 times at a speed of 2119 m/min, and heated to 165°C. The drawn yarn is crimped with a hot air texture lyde such as in U.S. Pat. No. 3,908,248 and attached to a rotating cooling sieve;
The air is removed from there using a vacuum device. Sieve expansion speed 45
It moved at m/min. A pair of cold threads) (god
It was unwound from the plug form on a cooling sieve at a speed of 1762 m 7 min determined at ). The yarn was then mixed in a conventional air jet and wound on a two-liter arm winder under a stretch of 200 pounds. When observed under a microscope under polarized light, there was no spherulite ring structure around the cross section of the fiber. Some of the produced yarns were processed in a commercial space dyeing operation and showed excellent uniformity and loft/coverage.

Other yarns were cabled, continuously heat set, tufted, and dyed by commercial methods to obtain excellent home-source carpets.

The fiber has the following properties: Gloss: Excellent Dtex: 1990 Tenacity: 2.311 / dtax Cutting Elongation
: 40% Tank bulkiness: 10.2% Dyeability: Fabric can be dyed with red acid dye; Ortalon Blue G
), there are no noticeable streaks.

The filament deformation ratio = 2.5 (pulquid continuous filament)
(Bulkecl Continuous Fila
ment) (BCF) exhibited the usual physical properties for products.

Implementation 9442 Implementation? 111 was carried out, and the following properties were obtained: Glossiness: Excellent Dt@x: 1430 Filament deformation ratio: 2.5 Tank bulkiness = 11% Ratio of R-form nylon-6 to α-form nylon-6
: 3.5/1 Dyeability: Cloth can be dyed with red acid dye; there were no noticeable streaks with Ortalon Del-G.

A product with After heat setting, this fiber was found to be predominantly α-form nylon-6.

In order to produce the crimped nylon-6 continuous filaments of the present invention, it is necessary to orient the fibers before any moisture migrates into the fibers. this is.

This is advantageously achieved by using an essentially non-aqueous spinning process such as that used in the examples above.

Although the invention has been described in detail in accordance with certain preferred embodiments, changes can be made in this specification without departing in any way from the spirit and scope of the invention as defined by the appended claims.

[Brief explanation of the drawing]

FIG. 1 shows two cross sections of a crimped nylon-6 continuous filament according to the prior art, and FIG. 2 shows two cross sections of a crimped nylon-6 continuous filament of the present invention without a spherulite ring structure. . Agent Asamura Kōgai 4 names 1 drawing 2

Claims (1)

[Scope of Claims] (1) A crimp nylon-6 continuous filament characterized by the absence of a spherulite structure along the periphery of the cross section when the cross section is observed under polarized light. (2) Claim I does not contain any matting agent! 1. The filament described in item 1. (3) Contains Ties as a matting agent, where the Ties are present in an amount of 0.1% by weight or less! 1. A filament according to claim 1. (4) Claim 1 in which the deformation ratio is approximately 2 to 3.
Filament as described in section. (5) The filament according to claim 1, having a tank bulkiness of at least 8%. (The filament according to claim 1, wherein the filament has a denier of at least 5.
8) The ratio of R-form nylon-6 to α-form nylon-6 is constant for the non-heat treated, undyed, crimped filament material and is at least 1 to 1.
Filament as described in section. (9) The filament according to claim 8, which does not contain any matting agent. Tie of a is present in an amount of up to 0.1% by weight. 'I'10. as a matting agent. Claim 8 containing
Item description 0 filament. A filament of claim 8 having a Ql deformation ratio of about 2 to 5. a-Patent for tank bulkiness of at least 8% - Requested 0
1ull The filament according to item 8. (11) After heat setting of the crimped filament material, α-purified N4-6 is the main content of claim 8.
filament. 114 41 Grant 0I111 The filament according to claim 1, which is assembled together with other filaments according to claim 1 to form a multifilament yarn.