JP2005120540A - Rope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope having decreased damage in the production of the rope and excellent weather resistance, abrasion resistance, water resistance and practical properties, especially a rope having excellent durability in the case of the exposure to a high-temperature and high-humidity environment. <P>SOLUTION: The polybenzazole fiber has a structure containing an additive such as perinones/perylenes, phthalocyanines, quinacridones, dioxanes, porphyrins, etc., arranged in a finely dispersed state along the polybenzazole molecule. The fiber exhibits a layer line X-ray scattering pattern originated from the regular arrangement of the additive molecules along the fiber axis of the polybenzazole fiber on the meridian circle of the long period of 0.05-5 nm and free from diffraction peak originated from the additive molecule on the equator line. The rope contains 0.9 wt.% lubricating oil and fat or resin component in the polybenzazole fiber. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rope made of polybenzazole fiber, particularly a rope suitable for industrial use, such as lifting a load, and having excellent durability when exposed to high temperature and high humidity.

Conventionally, polyester, nylon, etc. have been used as synthetic fibers for industrial ropes. Especially when lifting heavy objects, the rope will vibrate due to the expansion and contraction of the rope and snap back when the load is released. In order to prevent this, wire ropes made of metal and excellent in dimensional stability have been used.

However, the wire rope is heavy and easily entangled and kinked when shocked, and is difficult to handle. In order to eliminate such drawbacks, ropes composed of aramid fibers and high-strength polyethylene fibers have appeared.
The aramid fiber rope has a disadvantage that the specific strength and specific modulus are not sufficiently high, so that the thickness of the rope becomes large and the handleability is deteriorated. Further, in the rope of high strength polyethylene fiber, in addition to the thick rope, there is a disadvantage that the dimensional stability is lowered when heat is received from an object heated under the hot sun because of poor heat resistance.

  The present invention provides a high-strength and high-elastic modulus rope that is supple and easy to handle and has excellent durability when exposed to high temperatures and high humidity.

Therefore, the present inventors have intensively studied to develop a technique for easily producing a rope made of polybenzazole fiber having a small strength decrease even when exposed to a high temperature and high humidity for a long time, and as a result, the present invention has been achieved. .
That is, the present invention has the following configuration.
1. A rope comprising a polybenzazole fiber having a structure in which additive molecules finely dispersed along with polybenzazole molecules are arranged to contain 0.9% by weight or more of a lubricating oil or resin component.
2. Layered X-rays derived from the fact that polybenzazole fibers are regularly arranged along the fiber axis of polybenzazole fibers on the meridian in the region of 0.05 nm to 5 nm in a long period. The rope according to the first aspect, which has a structure exhibiting scattering.
3. The rope according to the first aspect, wherein the polybenzazole fiber has a structure exhibiting X-ray scattering in which a diffraction peak derived from an additive molecule does not appear on the equator.
4). The rope according to the first aspect, wherein the additive molecule is any one of perinone / perylenes, phthalocyanines, quinacridones, dioxanes, porphyrins, or a combination thereof.

  Since the rope according to the present invention uses polybenzazole fiber having a unique fiber microstructure that the fiber structure is defect-free, damage during processing into a rope can be reduced, weather resistance, wear resistance Rope, which has excellent properties, water resistance and practical properties.

Hereinafter, the present invention will be described in detail.
As means for realizing the ultimate physical properties of fibers, rigid polymers such as so-called ladder polymers have been considered, but such rigid polymers are not flexible and in order to have flexibility and processability as organic fibers. It is an essential condition that the polymer is linear.

  As shown by S. G. Wierschke et al. In Material Research Society Symposium Proceedings Vol. 134, p. 313 (1989), cis-type polyparaphenylene benzo has the highest theoretical elastic modulus. Bisoxazole. This result was also confirmed by Tashiro et al. (Macromolecules Vol. 24, p. 3706 (1991)). Among polybenzazoles, cis-type polyparaphenylenebenzobisoxazole has a crystal elastic modulus of 475 GPa (P Galen et al., Material Research Society Symposium Proceedings Vol. 134, p.329 (1989)), was thought to have the ultimate primary structure. Therefore, in order to obtain the ultimate elastic modulus, the theoretical consequence is to use polyparaphenylene benzobisoxazole as a polymer.

  The fiberization of the polymer is performed by the method described in US Pat. No. 5,296,185 and US Pat. No. 5,385,702, and the heat treatment is performed by the method proposed in US Pat. No. 5,296,185.

A little explanation is given about the electronic structure of the polybenzazole molecule. Polybenzazole has a structure in which heterocycles are linked and has a very high linear conjugation property. For this reason, it is imagined that π electrons exist very densely around the molecule. For example, such an electronic state can be understood by performing quantum chemical calculation (ab initio calculation). FIG. 1 is an example of a calculation result of all electronic states of a polybenzazole model compound. By knowing the electronic state, search for reactive sites in the molecule, and by placing some additive molecules in the vicinity of the polybenzazole molecule, screening for additives that can change the electronic state and suppressing the reaction. They are trying to improve weather resistance and heat and humidity resistance.
In order to solve the above problems, the present inventors have intensively studied from the viewpoint of molecular assembly design. As a result, the inventors have found that a fiber having a molecular structure capable of changing the electronic state of a polybenzazole molecule can be added to produce a fiber, and the present invention has been achieved. That is, the surface of the polybenzazole electrons is covered with π electrons, but additive molecules that act on the π electrons are arranged in the vicinity of the polybenzazole molecules. That is, a polybenzazole fiber characterized by exhibiting a structure in which additive molecules finely dispersed along the polybenzazole molecule are arranged in the vicinity, on a meridian in a region of 0.05 nm to 5 nm in a long period The polybenzazole fiber described above having a structure exhibiting layered X-ray scattering derived from the fact that the additive molecules are regularly arranged along the fiber axis of the polybenzazole fiber. And the diffraction peak derived from an additive molecule does not appear on the equator. Furthermore, the additive molecule coordinated to the polybenzazole molecule is a polybenzazole fiber that is one of perinone / perylenes, phthalocyanines, quinacridones, dioxanes, porphyrins, or a combination thereof.

In order to express the structural features described above, the points of the present invention can be realized by the following method.
That is, a spun yarn obtained by extruding a polymer dope composed of polyparaphenylene benzobisoxazole from a spinneret into a non-solidifying gas was introduced into a coagulation bath to extract phosphoric acid contained in the dope yarn. Thereafter, neutralization, washing with water, drying, and heat treatment are performed. At this time, the additive is added during the polymerization step or during the coagulation, water washing and neutralization steps. As a result, it has been found that when the higher order structure can be controlled so that the molecules are regularly aligned in a finely dispersed state with the polybenzazole molecules, a polybenzazole exhibiting the desired performance can be obtained.

  The present invention will be further described in detail below. The polybenzazole fiber in the present invention refers to a PBO homopolymer, and a random, sequential or block copolymer with polybenzazole (PBZ) containing substantially 85% or more of a PBO component. Here, the polybenzazole (PBZ) polymer is, for example, Wolf et al. “Liquid Crystalline Polymer Compositions, Process and Products”, US Pat. No. 4,703,103 (October 27, 1987), “Liquid Crystalline Polymer Prossmer Prossmer Cos. Patent No. 4,533,692 (August 6, 1985), “Liquid Crystalline Poly (2,6-Benzothiazole) Compositions, Process and Products”, US Pat. No. 4,533,724 (August 6, 1985), “Liquid Polymer Cristo Crystal Cristo s, Process and Products "U.S. Pat. No. 4,533,693 (August 6, 1985), Evers" Thermoactively Stable Artificial p-Benzoisoxazole and P-Benzozomol 3 1985 " "Method for making Heterocyclic Block Copolymer", U.S. Pat. No. 4,578,432 (March 25, 1986), and the like.

  The structural unit contained in the PBZ polymer is preferably selected from lyotropic liquid crystal polymers. The monomer unit consists of monomer units described in structural formulas (a) to (i), and more preferably consists essentially of monomer units selected from structural formulas (a) to (d).

  Suitable solvents for forming a polymer dope consisting essentially of PBO include cresol and a non-oxidizing acid capable of dissolving the polymer. Examples of suitable acid solvents include polyphosphoric acid, methane sulfonic acid and high concentrations of sulfuric acid or mixtures thereof. Further suitable solvents are polyphosphoric acid and methanesulfonic acid. The most suitable solvent is polyphosphoric acid.

  The polymer concentration in the solvent is preferably 1 to 30% by weight, more preferably 1 to 20% by weight. The maximum concentration is limited by practical handling properties such as polymer solubility and dope viscosity. Due to their limiting factors, the polymer concentration does not exceed 20% by weight.

  Suitable polymers, copolymers or dopes are synthesized by known techniques. For example, Wolfe et al., U.S. Pat. No. 4,533,693 (August 6, 1985), Sybert et al., U.S. Pat. No. 4,772,678 (September 20, 1988), Harris, U.S. Pat. No. 4,847,350 (July 11, 1989). It is synthesized by the method described in 1. A polymer consisting essentially of PBO, according to Gregory et al., US Pat. No. 5,089,591 (February 18, 1992), has a high reaction rate at high reaction rates under relatively high temperature, high shear conditions in a dehydrating acid solvent. Molecular weight is possible.

  The substance to be added for the present fiber is any one of dioxazines, perinones and / or perylenes, phthalocyanines, quinacridones, porphyrins, or a combination thereof.

  Perinones and / or perylenes include bisbenzimidazo [2,1-b: 2 ′, 1′-i] benzo [lmn] [3,8] phenanthroline-8,17-dione, bisbenzimidazo [2, 1-b: 1 ′, 2′-j] benzo [lmn] [3,8] phenanthroline-6,9-dione, 2,9-bis (p-methoxybenzyl) anthra [2,1,9-def: 6,5,10-d'e'f '] diisoquinoline-1,3,8,10 (2H, 9H) -tetron, 2,9-bis (p-ethoxybenzyl) anthra [2,1,9-def: 6,5,10-d'e'f '] diisoquinoline-1,3,8,10 (2H, 9H) -tetron, 2,9-bis (3,5-dimethylbenzyl) anthra [2,1,9- def: 6, 5, 10-d'e'f '] diiso Phosphorus-1,3,8,10 (2H, 9H) -tetron, 2,9-bis (p-methoxyphenyl) anthra [2,1,9-def: 6,5,10-d'e'f '] Diisoquinoline-1,3,8,10 (2H, 9H) -tetron, 2,9-bis (p-ethoxyphenyl) anthra [2,1,9-def: 6,5,10-d'e'f '] Diisoquinoline-1,3,8,10 (2H, 9H) -tetron, 2,9-bis (3,5-dimethylphenyl) anthra [2,1,9-def: 6,5,10-d'e'f '] Diisoquinoline-1,3,8,10 (2H, 9H) -tetron, 2,9-dimethylanthra [2,1,9-def: 6,5,10-d'e'f'] diisoquinoline-1,3 , 8,10 (2H, 9H) -Tetron, 2,9-bis (4-Pheni Azophenyl) anthra [2,1,9-def: 6,5,10-d'e'f '] diisoquinoline-1,3,8,10 (2H, 9H) -tetron, 8,16-pyransrangeon, etc. Can be given. There may be a combination of one or more compounds of these perinones.

  As the phthalocyanines, any metal species or atomic species may be used as long as it has a phthalocyanine skeleton. Specific examples of these compounds include 29H, 31H-phthalocyaninate (2-)-N29, N30, N31, N32 copper, 29H, 31H-phthalocyaninate (2-)-N29, N30, N31, N32 iron, 29H, 31H-phthalocyaninate-N29, N30, N31, N32 cobalt, 29H, 31H-phthalocyaninate (2-)-N29, N30, N31, N32 copper, oxo (29H, 31H-phthalate Russian titanate (2-)-N29, N30, N31, N32), (SP-5-12) titanium and the like. Further, these phthalocyanine skeletons may have one or more substituents such as a halogen atom, a methyl group, and a methoxy group. There may be a combination of one or more compounds of these phthalocyanines.

  Quinacridones include 5,12-dihydro-2,9-dimethylquino [2,3-b] acridine-7,14-dione, 5,12-dihydroquino [2,3-b] acridine-7,14-dione, 5, Examples include 12-dihydro-2,9-dichloroquino [2,3-b] acridine-7,14-dione, 5,12-dihydro-2,9-dibromoquino [2,3-b] acridine-7,14-dione, and the like. There may be a combination of one or more compounds of these quinacridones.

Dioxazines include 9,19-dichloro-5,15-diethyl-5,15-dihydrodiindolo [2,3-c: 2 ′, 3′-n] triphenodioxazine,
8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo [3
, 2-b: 3 ′, 2′-m] triphenodioxazine and the like. There may be a combination of one or more compounds of these dioxazines.

  Examples of porphyrins include phthalocyanine cobalt, phthalocyanine iron, protoporphyrin, porphyrin, guanine, adenine, ribofuran, folic acid, thymine, tryptophan, histidine, ferrocytochrome, ferritochrome, and the like. There may be a combination of one or more compounds of these dioxazines.

  In addition, two or more compounds of perylenes, perinones, phthalocyanines, quinacridones, dioxazines, porphyrins can be used in combination. Of course, the technical contents of the present invention are not limited to these.

  The dope polymerized in this way is supplied to the spinning section and discharged from the spinneret at a temperature of usually 100 ° C. or higher. A plurality of base pores are usually arranged in a circumferential shape or a lattice shape, but other arrangements may be used. The number of nozzle holes is not particularly limited, but the arrangement of the spinning holes on the spinneret surface needs to maintain a hole density that does not cause fusion between discharged yarns.

  In order to obtain a sufficient draw ratio (SDR), the spun yarn needs a sufficiently long draw zone length as described in US Pat. No. 5,296,185, and has a relatively high temperature (above the solidification temperature of the dope). It is desirable that the air is uniformly cooled with a rectified cooling air having a temperature equal to or lower than the spinning temperature. The length (L) of the draw zone needs to be a length that completes solidification in a non-solidifying gas, and is roughly determined by the single-hole discharge amount (Q). In order to obtain good fiber properties, the take-out stress of the draw zone needs to be 2 g / d or more in terms of polymer (assuming that only the polymer is stressed).

  The yarn drawn in the draw zone is then led to an extraction (coagulation) bath. Since the spinning tension is high, it is not necessary to consider the disturbance of the extraction bath, and any type of extraction bath may be used. For example, funnel type, water tank type, aspirator type or waterfall type can be used. The extract is preferably an aqueous phosphoric acid solution or water. Finally, 99.0% or more, preferably 99.5% or more of the phosphoric acid contained in the yarn is extracted in the extraction bath. The liquid used as the extraction medium in the present invention is not particularly limited, but preferably water, methanol, ethanol, acetone, ethylene glycol or the like that is substantially incompatible with polybenzazole. Further, the extraction (coagulation) bath may be separated into multiple stages, the concentration of the phosphoric acid aqueous solution is gradually reduced, and finally washed with water. Further, the fiber bundle is desirably neutralized with an aqueous sodium hydroxide solution and washed with water.

  The position where the additive is added to the polybenzazole is not particularly limited as long as it is a polymerization, coagulation, water washing, neutralization step or between them. What is important is to capture a structure that is sufficiently close to the polybenzazole molecule in a finely dispersed state. For this purpose, it is important to control the solidification temperature. Preferably, the temperature is controlled between −20 ° C. and 80 ° C., more preferably between −10 ° C. and 50 ° C., and most preferably between −5 ° C. and 45 ° C.

  The blending amount of the additive is adjusted so that the weight fraction in the state of the finished yarn is preferably 0.5% to 15%, more preferably 1% to 10%, and most preferably 2% to 7%. .

  When fibers are produced in this way, long-period scattering resulting from the regular alignment of additives with polybenzazole molecules on the meridian appears in a layered pattern on the meridian. The position of the long period that appears is preferably 0.05 nm to 50 nm, more preferably 0.5 nm to 45 nm, and most preferably 1 nm to 40 nm. A measurement example of the layer wire is shown in FIG.

  This figure was taken according to the small angle scattering measurement method described later. Here, (1) is an example of (001) diffraction of PBO, and (2) is an example of layered linear scattering derived from additive molecules.

  At this time, it is also necessary not to observe the additive-derived diffraction when measuring the small-angle scattering and wide-angle X-ray diffraction intensity in the equator direction of the fiber. It is also important not to interfere with the crystal growth of polybenzazole. In general, since the additive has a highly planar structure, the additive itself tends to aggregate and form crystals. In fact, when the wide-angle X-ray diffraction of the raw material additive is taken, it often has crystallinity. However, when crystals composed of such additives in the fiber are formed in the fiber structure in the form of domains, the portion becomes a structural defect, and the desired physical properties cannot be expressed.

The apparent crystal size derived from polybenzazole in the fiber structure and perpendicular to the (200) plane was calculated from the measured profile half width β _obs derived from (200) diffraction using the following equation.
β = (β _obs ² − β ₀ ² ) ^1/2
ACS = 0.9 λ / β cosθ
Here, β ₀ is the spread (half-value width) of incident X-rays used for measurement, λ is the X-ray wavelength, and 2θ is the diffraction angle.

<Measurement method of small angle X-ray scattering>
Small angle X-ray scattering is performed by the following method. X-rays used for measurement are generated using Rigaku Corporation's Rotorflex RU-300. A copper counter-cathode is used as a target, and operation is performed with a fine focus of, for example, an output 40 kv × 26 mA. The optical system uses a point converging camera, and the X-rays are monochromatic using a nickel filter. As the detector, an imaging plate (FDL UR-V) manufactured by Fuji Photo Film Co., Ltd. is used. The distance between the sample and the detector may be a suitable distance between 30 mm and 350 mm. In order to suppress disturbing background scattering from air or the like, helium gas may be filled between the sample and the detector. The exposure time is an appropriate time of about 5 minutes to 6 hours. To read the scattered intensity signal recorded on the imaging plate, digital micrography (Pixsys TEM) manufactured by Fuji Photo Film Co., Ltd. is used. The long period D was calculated using the following formula.
D = λ / 2 sin θ
Here, λ is the X-ray wavelength and 2θ is the scattering angle.

  Wide-angle X-ray diffraction from the fiber is measured by using, for example, a Lint 2500 diffractometer manufactured by Rigaku Corporation. The fiber was wound on a wrapping jig, attached to a fiber sample stage, and measured using the target transmission method. A copper counter cathode was used and the output was set to 40 kV 200 mA. Wide angle X-ray diffraction from the additive alone was measured using the wide angle reflection method.

  Regarding the mechanical properties of the fiber preferable for the production of the rope, the tensile strength is 4.0 GPa or more, preferably 4.5 GPa or more, and the initial tensile modulus is 140 GPa or more, preferably 150 GPa or more. And fibers exhibiting mechanical properties in this range can be sufficiently produced.

  In general, polybenzazole fibers produced by conventional manufacturing methods have high strength and high elastic modulus, but the stress applied from the side of the fibers is susceptible to damage such as fibrillation as with conventional aramid fibers. It was. However, since the polybenzazole fiber of the present invention has higher durability than the conventional product, it has a feature that the decrease in strength is small when used in a wet state. Furthermore, at least 0.9 wt., Preferably 1.0 wt.% Or more, and more preferably 2.0 wt.% For the purpose of exhibiting a function that does not easily cause slip stress concentration between fibers when an external force is applied to the fiber bundle. You may give the lubrication component of the weight% or more.

  Applying the lubricating component to the fiber is optional, such as a method of applying to the fiber manufacturing stage or a method of impregnating, coating, etc. after forming the obtained fiber or rope, but the wet slip component is filled between the fibers. For this, a method of directly applying to the fiber production stage or the obtained fiber is preferable.

  In the present invention, the surface of the polybenzoxazole strand to which the lubricating component is added is coated with a resin after steelmaking, whereby the collectability of the rope can be enhanced. A method of impregnating the rope surface with a polyurethane elastomer resin is effective for the purpose of improving the unraveling resistance of the rope surface and the stability of the surface state. As a resin coating method, a known method can be used. In particular, in order to improve the adhesion between the polybenzoxazole fiber and the resin, it is preferable to perform pretreatment such as corona treatment or plasma treatment of the fiber.

  In addition, the rope may be composed only of polybenzazole fibers, but by coating the outermost layer of the rope with a single layer or multiple layers of metal or organic fiber braid, the mechanical external force of the polybenzoxazole core wire Can be sufficiently protected. Examples of the braid for protecting the rope include metal fibers such as steel wires and stainless wires or thick spun yarns, esters, nylons, and the like, but the present invention is not limited thereto. In particular, coating with a braid of polyester filament taslan-processed yarn improves handling and increases the durability of the rope surface.

Hereinafter, the method for producing the rope of the present invention will be described specifically by way of examples. The moisture content contained in the fiber is determined by weighing after allowing the fiber to stand in an environment of 20 degrees Celsius and a relative humidity of 65% until no weight change is observed. That is, the weight of the fiber is weighed using an analytical balance, and then the fiber is left in an electric oven adjusted to 230 ° C. for 30 minutes to drain the moisture in the fiber and then weighed again. The equilibrium moisture content is evaluated using the following formula.
Equilibrium moisture content =
100 × (fiber weight when equilibrium is reached−fiber weight after drying) / fiber weight after drying [%]
The strong elongation characteristics of the rope were in accordance with JIS-L-2707 (1984). The wear characteristics were evaluated according to a method (percentage) obtained by dividing the weight of the test piece after the wear test by the initial weight according to the method of JIS-L-1021 (predetermined number of times is 10,000). In the water resistance test, the test piece (rope) was submerged in water (20 ° C.) for 1000 hours, then taken out from the water, the strength was measured within one minute, and the strength retention with respect to the initial strength was calculated.

Weather resistance test: Using a water-cooled xenon arc type weather meter (Atlas, type Ci35A), fix the film on the metal frame and set it in the apparatus, quartz on the inner filter glass, borosilicate on the outer filter glass, type S , Irradiance: 0.35 W / m ² (at 340 nm), black panel temperature: 60 ° C. ± 3 ° C., humidity in the test tank: 50% ± 5%, and a prototype rope was continuously irradiated for 100 hours. . The strength retention was determined by measuring the rope strength before and after exposure and dividing the measured value after the exposure test by the measured value before the exposure test.

(Example 1)
Obtained by the method shown in US Pat. No. 4,533,693 was 14.0% by weight of polyparaphenylene benzobisoxazole having an intrinsic viscosity of 24.4 dL / g measured with a methanesulfonic acid solution at 30 ° C. A spinning dope consisting of polyphosphoric acid with a phosphorus content of 83.17% was used for spinning. At this time, 29H, 31H-phthalocyaninate (2-)-N29, N30, N31, N32 copper is previously contained in the polyphosphoric acid. The dope is passed through a metal mesh-like filter medium, and then kneaded and defoamed with a biaxial kneading apparatus, and then the pressure is increased to maintain the polymer solution temperature at 170 ° C., and from the spinneret having a pore number of 166 After spinning at 170 ° C. and cooling the discharged yarn using cooling air at a temperature of 60 ° C., the discharged yarn was further cooled to 40 ° C. by natural cooling and then introduced into the coagulation bath. Fibers were prepared by changing the coagulation liquid and its temperature.

  Next, the fiber was wound around a gosset roll, the yarn was washed with ion-exchanged water in a second extraction bath at a constant speed, and then immersed in a 0.1 N sodium hydroxide solution for neutralization. Further, after washing with water in a water bath, it was wound up, dried in a drying oven at 80 ° C., and allowed to stand until the moisture content in the fiber was 2% or less. The fiber thus obtained was used as a raw yarn for producing a composite yarn. This polybenzbisoxazole fiber yarn was combined into a strand, which was processed into a four-pipe rope having a thickness of 12 mm. Before the raw yarn was twisted, 1.1% of coconut oil was applied as a lubricating oil. When the amount of the lubricating component was less than 0.9%, damage was caused when the rope was processed, and the weather resistance was lowered.

(Comparative Example 1)
29H, 31H-phthalocyaninate (2-)-N29, N30, N31, N32 A rope was produced in the same manner as in Example 1 except that copper was not added. The results are shown in Table 1.

(Comparative Example 2)
A rope was obtained in the same manner as in Example 1 except that Kevlar 49 was used. The results are shown in Table 1.

  Since the rope according to the present invention uses polybenzazole fiber having a unique fiber microstructure that the fiber structure is defect-free, damage during processing into a rope can be reduced, weather resistance, wear resistance Rope having excellent properties, water resistance and practical properties can be provided.

An example of the calculation result of all the electronic states of a polybenzazole model compound. The small angle X-ray-scattering image of the polybenzazole fiber which concerns on this invention.

Explanation of symbols

(1): (001) diffraction of polybenzazole fiber (2): Layered linear scattering derived from additive molecules

Claims (4)

  A rope comprising a polybenzazole fiber having a structure in which additive molecules finely dispersed along with polybenzazole molecules are arranged to contain 0.9% by weight or more of a lubricating oil or resin component.   Layered X-rays derived from the fact that polybenzazole fibers are regularly arranged along the fiber axis of polybenzazole fibers on the meridian in the region of 0.05 nm to 5 nm in a long period. The rope according to claim 1, wherein the rope has a structure exhibiting scattering.   The rope according to claim 1, wherein the polybenzazole fiber has a structure exhibiting X-ray scattering in which a diffraction peak derived from an additive molecule does not appear on the equator.   The rope according to claim 1, wherein the additive molecule is one of perinone / perylenes, phthalocyanines, quinacridones, dioxanes, porphyrins, or a combination thereof.

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