JPS5936718A - Conjugated fiber - Google Patents

Abstract

PURPOSE:Conjugated fiber to be blended with another fiber to give improved bulkiness, feeling, and configuration stability, obtained by combining eccentrically a component consisting essentially of an acrylic polymer with a component consisting of an elastic polymer containing an acrylic polymer in a phase separation state. CONSTITUTION:(A) A a component consisting of 100-70pts.wt. acrylic polymer (e.g., acrylonitrile-methyl acrylate-sodium methallyl-sulfonate copolymer, etc.) and 0-30pts.wt. elastic polymer (e.g., polyurethane, etc.) and (B) a component containing <50pts.wt. acrylic polymer are subjected to conjugated spinning using a spinneret, such as side by side type spinneret, etc. Consequently, the component A and the component B are bonded eccentrically, to give the desired conjugate fiber having a phase separation structure of the acrylic polymer and the elastic polymer in the component B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite fiber with excellent bulkiness, and in detail,
This invention relates to a composite fiber with excellent bulkiness made of an acrylic polymer and an elastic polymer.

Due to its good dyeability and rich texture, acrylic fibers are widely used in the clothing field, as a substitute for wool, as outerwear, as well as in the bedding field such as blankets, sheets, and carpets, and in the interior field. It is used. However, Acryi
Due to the structural instability of the polymer itself, PMH loses its shape (stretching, sagging, etc.) when used for a long period of time.
There is a drawback that this occurs. Furthermore, the physical properties of the fiber itself, such as bulkiness, swelling, and one-shot elasticity, are not sufficient. Products using polyurethane have been proposed in the past to improve these characteristics.

In Japanese Patent Publication No. 37-52'78, an elastic polymer and an inelastic polymer, which have weak adhesion to each other, are jointly spun and separated into each component during the manufacturing process such as stretching and shrinking, to produce a type of coverlink yarn. It is stated that Most of these splittable fibers use bofilament, acrylic fiber,
Cannot be blended with stable (short fibers) such as wool or cotton. Also, if you cut it short and try to blend it with staple fibers, the large elongation and recovery properties of the split polyurethane woven fibers will prevent the blending from being uniform, resulting in problems during spinning and the quality of the spun mV yarn. This causes low F (thread unevenness, neps, burrs).

On the other hand, Japanese Patent Publication No. 45-18045 proposes a method for producing an acrylic composite fiber in which both components, consisting of a polyacrylostridge polymer and a polyurethane polymer, are bonded. However, it is clear that crimping does not occur in wet heat (hot water, etc.), but that it has latent crimping fjt properties in dry heat or steam heat. It is thought that because the polymer is compatible with the polyurethane polymer (uniform solubility), the difference in stiffness and shrinkage between the two components is small, and there is no tendency to cause crimp in wet heat. The fibers do not have sufficient rigidity, elasticity, and shape retention, and the product does not seem to have sufficient important product performance such as crimping (usually crimping is done by moist heat), stiffness, and stiffness. It will be done.

Special Publication No. 46-2288' / Publication, Special Publication No. 46-228
In Publication No. 88, a polyacrylonitrile polymer is used as a component on one side of the composite fiber, and a polyacrylonitrile polymer and a polyurethane yarn polymer are introduced into the other components from separate inlets. A method for manufacturing side-by-side type and sheath type conjugate fibers has been proposed, which uses a blend having continuous sea-island-sakaki structure in the fiber axis direction by repeatedly joining and dividing two polymer solutions one after another. This composite fiber uses a polyacrylon (IJ) A-based polymer as one component, and an acrylonitrile-based polymer and polyurethane as the other component. A sea of components made with Shimakarezou - #M of each phase of the island
Therefore, a decrease in quality is expected due to a decrease in crimpability, an increase in fibrillation, and an increase in yarn fuzz.

As mentioned above, conventional f/! l, t #Ii welfare not obtained.

The misexplosion ψ people have diligently studied these and have arrived at the misfire 1I17.

The object of the present invention is Ataryl #l! fiber 1 wool, #i11 polyester, nylon and rayon, etc. J% K 7M
To provide a composite fiber that can be spun or blended and has excellent marketability, rich texture, and good shape stability.

The AJ component of the present invention contains 100 to 70 parts by weight of an acrylic polymer, 0 to 30 parts by weight of an elastic polymer, and 5 parts by weight of the B component.
oRR running part;
t'? This is due to the strength of the straw mats, which have a three-dimensional structure.

View of the acrylic polymer in component A h:to.

~70 parts by weight, preferably 98 to 80 parts by weight, more preferably 95 to 30 parts by weight, preferably 2 to 20 parts by weight, more preferably 5 to 15 parts by weight. If the ffi of the acrylic polymer is less than 70 parts by weight and the elastic polymer is more than 30 parts by weight or 1 part, the resulting composite #A fiber will lose its rigidity and should be avoided.

The amount of acrylic polymer in component B is 50 parts by weight, preferably 5 to 45 parts by weight, and moreover 10 to 45 parts by weight.
40 parts by weight, and the θ density of the elastic polymer is more than 50 parts by weight, preferably 55 to 95 parts by weight, more preferably 6 parts by weight.
This is the O-90JItfi section.

If the amount of the acrylic polymer is 50 weight or more, and the elastic polymer is less than 50 weight, the bulge and anti-strain elasticity of the obtained temporary stand #1m should be 2 smaller.

The A component and the B component must be joined in a side-by-side type, an eccentric pod type, etc. A component and B
The joining ratio of the components is usually 5,/l) (IrX:MJ
], but the ratio can be changed to hlJ depending on the purpose. However, in view of the physical properties of the composite fiber obtained and the operability during production, the bonding ratio A/B is preferably 2/8 to 8/2 (most preferably 3/7 to 7/3).

Where the bonding ratio A/Il is large, the amount of acrylic polymer component increases, and the more rigid composite fiber becomes 4'
On the contrary, when the bonding ratio A/B is small, the 11t of the elastic polymer increases L, and fibers with richer fullness and anti-I total elasticity are obtained.

In the B component, preferably in the A and B components, the acrylic polymer and the tg: polymer undergo phase separation, resulting in sea-island and J,
It has a ~ sea 1i ¥ structure. The sea-Ib in this ξ (
(or island-sea) In the 4M structure, only the sea component is continuous, and the t1 component is stretched in the axial gyrus of the IN fiber and exists phase-separated into an elongated rod shape (or spindle shape). Abandon the existing loan. This jil structure is smaller and smaller than the fibers obtained using spindles, rectifier-distribution plates, which are dedicated for the production of sea-local or multi-layer fibers. It is shorter, more numerous, and more diverse! 1% is characteristic.

In component B, preferably both the ldh component and component B contain the main component polymer of other 1a in a state dispersed in a large number of islands.
This improves the adhesion of both ASB components and prevents peeling. This is greatly different from the conventional sea-island fibers that are continuous in the axial direction of the ta fiber sheath; Conventional sea-island fibers tend to have a small number of bonding points that are continuous in the IM if axis direction, whereas conventional sea-island fibers have bonding points between the components.

It is also believed that the effect of dispersing the peeling stress of the many dispersed bonding points in the fiber of the present invention is also effective in preventing the peeling of components A and B.

As the acrylic polymer 10 used in the present invention, a known polymer can be used. For example, 1 nonitrile is 8
There are acrylonitrile polymers containing 0% by weight or more, and acrylic polymers containing 20 to 60% by weight of halogen element-containing monomers such as vinyl chloride, vinylidene chloride, and vinyl bromide. Atarylic acid varnish T as other monomers that can be copolymerized with acrylic polymers
methacrylic acid ester, vinyl acetate, styrene, Iku's hydrophobic neutral monomer, acrylamide, methacturamide, N-methylacrylamide, N,N-dimethylacrylamide, N-acrylmorpholine, N-acrylthiomorpholine, N-vinyl- N-methylformamide, N-vinyl-H-methylacetamide, ZJ-
Vinyl pyrrolidone, N-vinyl pyrrolidone, N-
It's not like vinylhyveridine! X A Note - Pituma-1P-styrenesulfonic acid, methallylsulfonic acid,'
Examples include ionic monomers such as lylsulfone, acrylic acid, methacrylic acid, vinylbenzoic acid or salts thereof, 3-vinylpyridine, and 2-methyl-5-vinylpyridine.

No'cryl yarn polymerization in both components A and B (IC&J: may be the same C or different, and there are no differences in productivity, cost, added functions, etc.) 0 UC of the present invention is applied The elastic Tb polymer is preferably miscible with the acrylic polymer, but it is preferably incompatible. If the compatibility is high, the stiffness, heat resistance, and influence of the acrylic polymer will be In addition, the elasticity of the elastomeric polymer decreases during 11 minutes.In this way, the elastomeric polymers include polyurethane-based ton-alpha, 7-11'c + nitrile butadiene com-acrylic. Rubber, etc., but solvent-soluble,
#4I1m, polyurethane thread coalescence is preferred in terms of physical properties such as formability and rubber elasticity.

The polyurethane-based polymer is a general term for polyester type, polyether type, polyester ether type, polyester amide type and polythioether type polyurethane, and specifically ethylene glycol, propylene glycol, butylene glycol, hexamethylene Polyesters consisting of glycol, 1,4-cytyl glycol, P-xylene glycol, or bisphenol A and rdipic acid, peveric acid; cepatic acid, arephthalic acid, -(sophthalic acid, or -lactone, etc.), and rubonic acids. Polyvarnish prepared from 1 lua (do, no ethylene glycol, triethylene glycol, 1,4-phenylene bisoxyethyl ether, and Polyester needle made from the above-mentioned dicarboxylic acids,
Molecular weights of 200 to 30, such as ethylene oxide, propylene oxide, polyethers made of 7-tofhydrofuran, and volite secondary polymers such as thiodiglycol.
Diisocyanates that produce AlI31-like polymers having 000 terminal water N groups, such as 3-phenylene diisocyanate, 1-4-phenylene diisocyanate, 2@j
-1 rylene isocyanate, 4,4'-diphenylmethane diisocyanate, hexyrimethylene diisocyanate, xylene diisocyanate, or 1,5-naphthylene diisocyanate with a chain extender of 2-alcohol by a known polymerization method. ~It is a urethane-based Nagi combination.

The polyurethane to be used should be soluble in the solvent used for the acrylic thread polymer and should not cause aggregation or gelation when mixed with the acrylic polymer. The elastic polymers used for the A component and the B component may be different. In particular, the initial elastic modulus of the elastic polymer used for the B component is preferably 40 kg/- or more. The degree of polymerization of 71ζriurekun is preferably not more than 4 or more, and is preferably 20 poise or more in a 20% by weight dimethylformamide solution at 25°C.

Next, an example of the method for producing the fiber of the present invention will be given. A mixture of polyacrylonitrile polymer and polyurethane is used as a common WJ agent such as dimethylformamide, dimethylacetamide, dimethyl sulfoxide, etc.
Two types of spinning dope solutions dissolved to 40% by weight were heated in ir.
Then, the spinning solution is mixed with an aqueous solvent solution or a suitable solution of alcohol, polysulfuric alcohol, tarosin, etc., and the spinning process is carried out. When mixing small acrylonitrile and polyurethane, it is necessary to dissolve a mixture of 1U and 1hiy. , or Jit combination
t bjj There are various methods such as mixing or polymerizing a polyacrylonitrile polymer in a solution of polyurethane. Preferably both solutions are mixed and then gold t9. It is recommended that the dispersion form in the mixed solution be uniform and stabilized by passing through a filter having small openings such as filtrate, paper, gold, or mesh. The spinneret is a regular size 1
゛Bi-id type or eccentric. Also, pod-type composite gold or other coal-based gold can be used as is. The width of the spinning stock solution and spinning bath is set so that the acrylic layer combination and polyurethane are slightly hardened. For this purpose, it is also preferable to add a solvent removing agent to the spinning dope.

Coagulation of the coagulation, Dl,! Stretched several times in hot water that also serves as a solvent, then washed with water, followed by washing, drying, and post-treatment.Drying is usually done using a hot air dryer or hot roller type dryer, and the hot water temperature is 1ootl: Perform at ~200°C. After part 1
Step 71i is performed to adjust the physical properties of the product, and includes stretching, shrinkage (thermal relaxation treatment), A-illing, etc. The product is obtained as fitment, tow and staple.

In the sliding fiber of the present invention, both components A and B are composed of an acrylic polymer and an elastic polymer, respectively, and have excellent latent crimpability. Crimp occurs in both raw cotton, spun yarn 1, and printed/silk fabrics. The developed crimp has an unprecedented potential crimp property that can take on a variety of forms by changing the composition and bonding specific gravity of components A and B. In addition, since the B component is mainly an elastic polymer, it has excellent crimp elasticity and bulkiness, and is better than conventional acrylic polymers than brass fibers.
There is little elongation of the crimp. As mentioned above, the fineness of the composite weave with excellent quality is delicate acrylic, sheep, cotton, rayon, nylon, polyester/411M fiber blend, tomoara, and the unique texture of 1 °・、
A product with pulpy properties is obtained.

The present invention will now be described in more detail with reference to Examples. Real tJi III, part, %ta/# 1u
Riri 1 shows the straw part and i1 eye β.

Example 1 Acrylonitrile: Sodium acrylonitrile methyl nymecryl sulfonate was 90.479. Acrylic A polymer having the composition of o: α6 (branch)) was mixed with dimethylformamide (
Polymerization 1-1 unreacted 7-mer was recovered by a known method in DMP (hereinafter referred to as DMP), and a 1-digit acrylic polymer coalesce solution with a polymer n degree of 21% was added.

Polyester glycol of molecule jft25oo obtained by reaction of ethylene glycol and adipic acid Example 2 The acrylic polymer solution used in Example #i I1 and! ! /
Composite fibers were prepared in the same manner as in Example 1 using a DMF solution of 15% polymer concentration of commercially available 4. A-component boliuretan old 41-
A d was 5%, and B component was 80%. The poid-like glue of the obtained fibers was hardly present in the A component, and there was some in the B component (a small amount of 'F was present, dyed), but it was not so much that it moved to the right. The contact α of the father A-H1 grilling was all good.
1 extension to C0 strength, slight curling and shrinkage degree are J Engineering S-]
, I'm on jet 11 on fJ 74);! 1-n'e
.

Claims (1)

[Scope of Claims] 1) An elastic polymer containing an acrylic thread polymer in which the Δ component is composed of 100 to 70 parts by weight of an acrylic polymer and 0 to 30 parts by weight of an elastic polymer, and the B component is less than 50 parts by weight. A composite fiber consisting of a combination, in which the A component and the B component are joined eccentrically, and the acrylic polymer and elastic polymer in the B component have a phase-separated structure. 2) The fiber according to claim 1, wherein component A comprises 98 to 70 parts by weight of an acrylic polymer and 2 to 30 parts by weight of an elastic polymer. 3) The fiber according to claim 1, wherein component B comprises 5 to 45 parts of an acrylic polymer and 95 to 55 parts of an elastic polymer. 4) The Ili fiber according to claim 1, wherein the elastic polymer is polyurethane. 6) The fiber according to claim 1, which contains an acrylic polymer and an elastic polymer in component A and has a phase composition of 11A4n.