JPH10158927A - Polypropylene yarn having high luster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a highly lustering polypropylene yarn having the same luster as that of rayon. SOLUTION: This highly lustering polypropylene yarn comprises a resin composition composed of [A] 70-99 pts.wt. of a polypropylene and [B] 1-30 pts.wt. of a petroleum resin having 80-160 deg.C softening point (the total of the components A and B is 100 pts.wt.). The petroleum resin B is preferably a hydrogenated petroleum resin and the polypropylene A has preferably 1-100g/10 minutes melt flow rate (MFR: ASTM D1238, 230 deg.C, 2.16 kg load).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-gloss polypropylene fiber, and more particularly, to a high-gloss polypropylene fiber composed of polypropylene and petroleum resin.

[0002]

BACKGROUND OF THE INVENTION Polypropylene fibers have excellent transparency, heat resistance and mechanical properties, and have been conventionally used in industries such as fishing nets, ropes, filter cloths, strings, tents and futons.

If high glossiness such as rayon can be imparted to such a polypropylene fiber, it can be used for clothing such as women's clothing, blouses, underwear, lining, kimono accessories, scarves, curtains, tablecloths, carpets, wallpapers, blankets, It can be used for interior and bedding such as nightclothes.

Therefore, as a method for imparting high glossiness such as rayon to the polypropylene fiber, there are (1) a method of controlling propylene fiber forming conditions (spinning and drawing conditions);
There are (2) a method of adding a crystallization nucleating agent to polypropylene, and (3) a method of adding a random copolymer such as an ethylene / propylene random copolymer to polypropylene.

However, in these methods, a high-gloss unstretched yarn can be obtained, but when the unstretched yarn is stretched, the gloss is greatly reduced, so that a polypropylene fiber having a satisfactory gloss cannot be obtained.

[0006] Therefore, the appearance of polypropylene fibers having a high gloss like rayon is desired. The present inventors have made intensive studies on polypropylene fibers having high glossiness such as rayon, and as a result, spin and draw a resin composition in which [A] polypropylene and [B] petroleum resin are mixed at a specific ratio. As a result, they have found that the obtained polypropylene fiber has high glossiness like rayon, is lightweight and has excellent mechanical properties, and has completed the present invention.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and has as its object to provide a high-gloss polypropylene fiber having gloss similar to that of rayon.

[0008]

The high-gloss polypropylene fiber according to the present invention comprises: [A] 70 to 99 parts by weight of polypropylene;
[B] A resin composition comprising 1 to 30 parts by weight of a petroleum resin having a softening point of 80 to 160 ° C (the total amount of components [A] and [B] is 100 parts by weight). It is characterized by.

The petroleum resin [B] is preferably a hydrogenated petroleum resin. The polypropylene [A] preferably has a melt flow rate (MFR) of 1 to 100 g / 10 minutes.

[0010]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the high gloss polypropylene fiber according to the present invention will be specifically described. The polypropylene fiber having high gloss according to the present invention comprises a resin composition containing [A] polypropylene and [B] a petroleum resin having a softening point of 80 to 160 ° C.

First, each of these components will be described. [A] Polypropylene The polypropylene [A] used in the present invention has a melt flow rate (MFR; ASTM D1238, 230 ° C, 2.16k).
g load) is 1 to 100 g / 10 min, preferably 9 to 50 g
/ 10 minutes, more preferably 15 to 30 g / 10 minutes. When a polypropylene having a melt flow rate within the above range is used, a polypropylene fiber excellent in spinnability, mechanical strength and stretchability can be obtained.

The polypropylene [A] has an intrinsic viscosity [η] (measured in decalin at 135 ° C.) of usually 1.0 to 1.0.
5.0 dl / g, stereoregularity (isotactic pentad fraction in a boiling heptane-insoluble portion) is 92 to 99%, melting point is usually 160 to 170 ° C, and glass transition temperature is usually -30. To + 10 ° C. and the softening point is usually 15
The temperature is preferably from 0 to 160 ° C.

In the present invention, polypropylene produced by various methods can be used, but polypropylene produced using a catalyst for producing highly stereoregular polypropylene is desirable. Such a catalyst for producing highly stereoregular polypropylene includes, for example, a solid titanium catalyst component containing titanium, magnesium, halogen and, if necessary, an electron donor, an organic aluminum compound, and further, if necessary, an electron donor. And a metallocene catalyst using a crosslinked metallocene compound and an organoaluminum oxy compound as catalyst components. A method for producing polypropylene using such a catalyst is described in, for example, Japanese Patent Application Laid-Open No. 50-1083.
No. 85, JP-A-50-126590, JP-A-51-2
0297, JP-A-51-28189, JP-A-52-189
The details are described in gazettes such as 151691. The techniques described therein can also be used in the present invention.

The polypropylene used in the present invention may be a propylene homopolymer or a copolymer of propylene and another α-olefin. Other α-olefins forming the propylene copolymer include α-olefins having 2 to 20 carbon atoms excluding propylene, and specifically, ethylene, 1-butene, 1-pentene, 1-
Hexene, 3-methyl-1-butene, 3-methyl-1-pentene,
3-ethyl-1-pentene, 4-methyl-1-pentene, 1-octene, 1-decene and the like.

The propylene used in the present invention and other α-
The copolymer with olefin contains 50 mol% or more, preferably 80 mol% or more of the structural unit derived from propylene.

[B] Petroleum resin In the present invention, the softening point (measured by a ring and ball method in accordance with ASTM-D-1525) is 80 to 160 ° C., preferably 90 to 150 ° C.
° C, more preferably 115-140 ° C petroleum resin is used. When a petroleum resin having a softening point within such a range is used, a polypropylene fiber having excellent heat resistance can be obtained.

The petroleum resin is not particularly limited except that the softening point is within the above range, and a petroleum resin produced by a known method can be used. Examples of such petroleum resins include those obtained by polymerizing without isolating diolefins and monoolefins contained in a cracked oil fraction by-produced from an ethylene plant that produces ethylene, propylene, etc. by steam cracking of petroleum. , and the called from a source fraction C ₅ petroleum resins, and C ₉ petroleum resins.

In any case, since the mixed fraction is used as a raw material for polymerization,
The chemical structure cannot be determined unconditionally, but a typical structure is as follows.

[0019]

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[0020] C ₅ petroleum resin main component, isoprene, piperylene, a copolymer, such as 2-methylbutene-1 and 2-methylbutene -2, the main component of the C ₉ petroleum resin, styrene, vinyl toluene, It is a copolymer of α-methylstyrene and indene.

Further petroleum resin, a with cyclopentadiene, dicyclopentadiene and multimers thereof, or a cyclopentadienyl-based petroleum resin obtained by polymerizing such their alkyl substitution products contained in the C ₅ fraction of naphtha cracked oil You may.

[0022]

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In the present invention, the petroleum resin is preferably a hydrogenated petroleum resin obtained by adding hydrogen to the above petroleum resin. Examples of such a hydrogenated petroleum resin include an alicyclic saturated hydrocarbon resin.

[C] Pigment In the present invention, a pigment [C] may be added to the resin composition as needed.

The pigment is not particularly limited as long as it is generally used as a pigment. For example, titanium dioxide, zinc white, basic lead carbonate, carbon black, graphite,
Trilead tetroxide, lead chromate, mercuric sulfide, ultramarine, navy blue,
Inorganic pigments such as cobalt oxide, titanium dioxide, strontium chromate, titanium yellow, titanium black, zinc chromate, black iron oxide, molybdenum red, molybdenum white, litharge, lithopone, calcium carbonate, clay, talc, azo pigments, phthalocyanine blue, dyeing Organic pigments such as lakes Metal powder pigments such as aluminum powder (silver powder) and bronze powder (gold powder) are used. These may be used by mixing a plurality of types.

In the present invention, the pigment compounded in the resin composition has a particle size of 0.01 to 1.0 μm, preferably 0.01 to 1.0 μm.
0.30 μm is desirable, and colored glossy fibers can be obtained.

Resin Composition The resin composition used for producing the high-gloss polypropylene fiber of the present invention comprises, as described above, polypropylene [A] and petroleum resin [B] having a softening point of 80 to 160 ° C.
And, if necessary, a pigment [C], and the polypropylene [A] is contained in an amount of 70 to 99 parts by weight, preferably 85 to 98 parts by weight, more preferably 93 to 97 parts by weight. Resin [B] is contained in an amount of 1 to 30 parts by weight, preferably 2 to 15 parts by weight, more preferably 3 to 7 parts by weight. However, the total amount of the components [A] and [B] is 100 parts by weight.

When a resin composition containing the petroleum resin [B] in the above ratio is used, a polypropylene fiber having excellent mechanical properties and heat resistance and high gloss can be obtained. This resin composition has good spinnability.

The pigment [C] varies depending on the kind of the pigment, the intended color, and the like. However, the pigment [C] is usually 0.1% based on the total amount of the polypropylene [A] and the petroleum resin [B].
What is necessary is just to mix | blend in the ratio of 1-5 weight%, Preferably it is 0.5-4.0 weight%.

In addition to the pigment [C], the resin composition may further comprise an ultraviolet absorber, as long as the object of the present invention is not impaired.
Additives that are generally compounded with polypropylene, such as weathering stabilizers, heat stabilizers, antiblocking agents, lubricants, antistatic agents, and nucleating agents, may be added.

Examples of ultraviolet absorbers and weather stabilizers include benzophenone-based, benzotriazole-based, salicylate-based, cyanoacrylate-based, oxalic acid amide-based, and Ni-based ultraviolet absorbers, and hindered amine-based weather-resistant stabilizers. Is mentioned.

Examples of the heat-resistant stabilizer include phenol-based, phosphorus-based, and sulfur-based heat stabilizers. As an anti-blocking agent, natural silica, synthetic silica, alumina silica, talc, high-density polyethylene (HDP
E), polystyrene (PS), melamine-based antiblocking agents, spherical silicon, polymethyl methacrylate (PMMA), and the like.

Examples of the lubricant include hydrocarbons, higher alcohols, polyhydric alcohols, higher fatty acids, esters, fatty acid amides, metal salts of higher fatty acids, and the like. Examples of the antistatic agent include cationic, anionic and nonionic antistatic agents, and polypropylene generally uses a nonionic antistatic agent. Examples of such an antistatic agent include a monofatty acid ester of alkyldiethanolamine, an alkyldiethanolamine, and a glycerin monofatty acid ester.

As the nucleating agent, aluminum-based, Na-based, Ba-based,
Examples include nucleating agents such as benzylidene sorbitol and talc. Further, the resin composition may contain an elastomer in an amount of usually 10% by weight or less as long as the object of the present invention is not impaired. Such elastomers include ethylene-based, styrene-based, and diene-based elastomers. Specifically, EPR, EPDM, SB
S, SEBS, SIS, SEPS and the like.

The above resin composition can be prepared by applying a conventionally known melt kneading method. For example, after dry-blending a polypropylene resin [A] and a petroleum resin [B] having a softening point of 80 to 160 ° C, a pigment [C] is further added as necessary, and the mixture is melt-kneaded using an extruder. Good.

High-gloss polypropylene fiber The high-gloss polypropylene fiber according to the present invention can be obtained by spinning the above resin composition into a fibrous form by a conventionally known melt spinning method, and then drawing. .

In this melt spinning method, the above resin composition is heated to a temperature not lower than the melting point (or softening point) and lower than the decomposition temperature,
This is a method of heating to a temperature of about 300 ° C., preferably 190 to 260 ° C. to obtain a molten state, extruding from various die (dies, nozzles), cooling the extruded raw yarn, and winding it. In this method, various types of bases (D = 0.
3 to 2.0) can be used, but a nozzle having an L / D value of 5 to 40 is preferable. The shear rate is usually 10 to 2000se
c ^-1 , preferably 50 to 500 sec ^-1 . The winding speed of the multifilament or monofilament extruded at such a speed is 10 to 3000 m / min.

The monofilament has a thickness of usually 10 to 1000 denier, preferably 10 to 100 denier. Next, a high gloss polypropylene fiber is obtained by drawing this multi or monofilament. If necessary, heat setting and slight twisting may be applied together with or after stretching.

The stretching of the filament is, for example, about 95 to
This is carried out by passing the filament through a constant temperature water bath at 120 ° C. The stretching speed is usually from 10 to 200 m / min.

The draw ratio for obtaining the high gloss polypropylene fiber of the present invention is 1.5 to 10 times, preferably 4.0.
It is up to 6.0 times. Further, the high-gloss polypropylene fiber according to the present invention can also be obtained by a method of forming a film from the resin composition and fibrillating the film, in addition to the above method.

In this method, a film made of the above resin composition is formed, slit to an appropriate width, and drawn to produce a fiber. In producing a polypropylene fiber by this method, usually, first, a raw film made of the above resin composition is prepared.

The raw film is obtained by molding the above resin composition by a known method such as a T-die method or an inflation method. Such a raw film is
The thickness is usually 0.01 to 2 mm, preferably 5 to 20 mm.

Next, the raw film is slit into a width of usually 5 to 50 mm, preferably 5 to 20 mm using a slitter or the like, and further heated and stretched using a hot plate or a hot roll. A high gloss polypropylene fiber according to the present invention is obtained. Further, a split may be added.

The drawing is carried out in the same manner as in the case of drawing the multi or monofilament obtained by the above melt spinning method.

[0045]

According to the present invention, it is possible to supply highly glossy polypropylene fibers which are extremely lightweight and have the same high gloss as rayon at a low production cost. In particular, higher glossiness can be obtained with colored fibers such as gold and silver.

The high-gloss polypropylene fiber according to the present invention is suitable for use in clothes, decorative ropes, curtains, carpets and other living goods.

[0047]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples. [Evaluation Method] The physical properties of [A] polypropylene and [B] petroleum resin used in the present invention and the gloss of the obtained polypropylene fibers were measured as follows.

(1) Melt flow rate (MFR); ASTM-
The measurement was performed at 230 ° C. and a load of 2.16 kg according to D-1238. (2) Softening point: Measured according to ASTM-D-1525.

(3) Relative gloss: The gloss energy of the reflected light was measured using an automatic goniophotometer (gonion meter), and was calculated from the measurement result by the following formula [I].

[0050]

(Equation 1)

The greater the value, the greater the glitter.

[0052]

Example 1 95 parts by weight of a polypropylene having an MFR of 30 g / 10 minutes and a hydrogenated petroleum resin having a softening point of 140 ° C. (alicyclic saturated hydrocarbon resin; trade name: Alcon P-140, manufactured by Arakawa Chemical Co., Ltd.) Value, number average molecular weight (Mn); 860) and 5 parts by weight were dry-blended using a Henschel mixer or a tumbler mixer, and the mixed resin composition was spun under the following conditions to obtain a monofilament. .

Next, the monofilament was uniaxially stretched under the following conditions until the monofilament became 6 times, and the thickness was reduced to 1: 1.
2d polypropylene fiber was obtained. The gloss energy of the obtained polypropylene fiber was measured, and the relative glossiness was calculated. The results are shown in Table 1.

[Spinning conditions] Extruder: Shimadzu Corporation Screw: 30 m / m, single screw, full flight Nozzle: 0.45 m / m, 30 holes Heater temperature: 180, 200, 220, 220, 230 ° C. Nozzle temperature: 230 ° C. Extrusion speed: 45 g / min / 30 hole Winding speed: 400m / min [Stretching conditions] Uniaxial stretching machine: Hot plate type (touch shoe type) manufactured by Shimadzu Corporation Stretching speed: 20m / min Stretching temperature: preheating 100 ° C, stretching 120 ° C, fixed 120 ° C

[0055]

Example 2 A polypropylene fiber was obtained in the same manner as in Example 1, except that the blending amount of the hydrogenated petroleum resin was changed to 3 parts by weight. The obtained polypropylene fibers were evaluated in the same manner as in Example 1, and the obtained results are shown in Table 1.

[0056]

Example 3 In Example 1, the mixed resin composition was added with ME
Except blending 2% by weight of ARL Magnapearl 3000,
In the same manner as in Example 1, a silver polypropylene fiber was obtained. The obtained polypropylene fibers were evaluated in the same manner as in Example 1, and the obtained results are shown in Table 1.

[0057]

Example 4 In Example 1, ME was added to the mixed resin composition.
A gold-colored polypropylene fiber was obtained in the same manner as in Example 1 except that 2% by weight of Magnapearl 3000 manufactured by ARL and 0.15% by weight of Chromophtal YellowGR manufactured by Ciba-Gaiky were blended. The obtained polypropylene fibers were evaluated in the same manner as in Example 1, and the obtained results are shown in Table 1.

[0058]

Example 5 The procedure of Example 1 was repeated except that the mixed resin composition was blended with 2% by weight of TA-500 manufactured by Fuji Titanium Kogyo and 0.15% by weight of Chromophtal Scarlet RN manufactured by Ciba-Gaiky.
In the same manner as in Example 1, a pink polypropylene fiber was obtained. The obtained polypropylene fibers were evaluated in the same manner as in Example 1, and the obtained results are shown in Table 1.

[0059]

Comparative Example 1 A polypropylene fiber was obtained in the same manner as in Example 1, except that the blending amount of the hydrogenated petroleum resin was changed to 0 parts by weight. The obtained polypropylene fibers were evaluated in the same manner as in Example 1, and the obtained results are shown in Table 1.

[0060]

Comparative Example 2 Example 1 was repeated except that the blending amount of the hydrogenated petroleum resin was changed to 0 parts by weight, and 2% by weight of Magnapearl 3000 manufactured by MEARL was added to the mixed resin composition.
In the same manner as in the above, a silver polypropylene fiber was obtained. The obtained polypropylene fibers were evaluated in the same manner as in Example 1, and the obtained results are shown in Table 1.

[0061]

Comparative Example 3 In Example 1, the blending amount of the hydrogenated petroleum resin was changed to 0 parts by weight, and the mixed resin composition was further added with 2% by weight of Magnapearl 3000 manufactured by MEARL and 0.15% by weight of Chromophtal Yellow GR manufactured by Cibagaykey. A gold-colored polypropylene fiber was obtained in the same manner as in Example 1 except for blending. The obtained polypropylene fibers were evaluated in the same manner as in Example 1, and the obtained results are shown in Table 1.

[0062]

Comparative Example 4 In Example 1, the blending amount of the hydrogenated petroleum resin was changed to 0 parts by weight, and the mixed resin composition was further added with TA-500 manufactured by Fuji Titanium Kogyo Co. Example 1 except that
In the same manner as in the above, a pink polypropylene fiber was obtained.
The obtained polypropylene fibers were evaluated in the same manner as in Example 1, and the obtained results are shown in Table 1.

[0063]

Example 6 In Example 1, the hydrogenated petroleum resin was
A hydrogenated petroleum resin having a softening point of 115 ° C (alicyclic saturated hydrocarbon resin; trade name: Alcon P-115, manufactured by Arakawa Chemical Co., Ltd.) is used, and 2% by weight of Magnapearl 3000 manufactured by MEARL and chromophtal manufactured by Cibagaiki A gold-colored polypropylene fiber was obtained in the same manner as in Example 1 except that 0.15% by weight of YellowGR was added. The obtained polypropylene fiber was a glossy fiber as in Examples 1 to 5.

[0064]

[Table 1]

Claims (3)

[Claims] 1. [A] 70 to 99 parts by weight of polypropylene; [B] 1 to 30 parts by weight of a petroleum resin having a softening point of 80 to 160 ° C. (the total amount of components [A] and [B] is 100 parts by weight. And a high gloss polypropylene fiber characterized by comprising a resin composition comprising: 2. The high gloss polypropylene fiber according to claim 1, wherein said petroleum resin [B] is a hydrogenated petroleum resin. 3. A melt flow rate of the polypropylene [A] (MFR; ASTM D1238, 230 ° C., 2.16 kg load).
Is 1 to 100 g / 10 minutes.
Or the high gloss polypropylene fiber according to 2.