JP2003246350A - Binding band made of thermoplastic resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a binding band of excellent weather resistance, strength, surface appearance, and productivity. <P>SOLUTION: This binding band is formed of polytrimethylene terephthalate resin. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a building such as a house,
Alternatively, the present invention relates to a binding band used for binding wiring cords in automobiles, home electric appliances, etc., and packing luggage. More specifically, it has excellent weather resistance, strength, and surface appearance,
The present invention also relates to a binding band having excellent productivity.

[0002]

2. Description of the Related Art Conventionally, many binding bands have been manufactured from metal such as stainless steel or thermoplastic resin such as polyamide resin or polyethylene terephthalate resin. It is usefully used for bundling wiring cords and packing luggage. Among these, although metal has excellent strength, it has a large specific gravity, which makes the product heavy. In addition, complicated processing steps are required, and there is a problem in terms of productivity.

As the binding band made of a thermoplastic resin, polyamide resin represented by 6, 66 is exemplified (see, for example, Patent Documents 1 and 2). Although a binding band made of a polyamide resin has excellent mechanical properties and heat resistance when dried, it has a large decrease in strength when it absorbs water, and since a polyamide resin generally has poor weather resistance, it can be exposed outdoors. It is not suitable for use in, and its usage is limited. As the polyester-based resin, a binding band made of polyethylene terephthalate resin (hereinafter sometimes abbreviated as PET) is exemplified (see, for example, Patent Documents 3 and 4). In the case of these examples, although it is suitable for a long binding band etc. necessary for packing a large load, various steps such as extrusion and stretching are indispensable and the manufacturing process is complicated, so that the housing It is not suitable for binding wiring cords in buildings, automobiles, home appliances, etc., or a relatively small binding band used for packing small luggage.

[0004]

[Patent Document 1] Japanese Patent Laid-Open No. 8-73736

[Patent Document 2] Japanese Patent Laid-Open No. 10-204290

[Patent Document 3] JP-A-55-100138

[Patent Document 4] JP-A-57-68357

[0005]

In view of the above situation, it is an object of the present invention to provide a binding band which is excellent in weather resistance, strength, surface appearance and productivity.

[0006]

Means for Solving the Problems As a result of intensive studies to achieve the above-mentioned object, the present inventor has found that a binding band made of polytrimethylene terephthalate resin which is a thermoplastic polyester resin has excellent weather resistance and strength, and Further, they have found that they are also excellent in productivity and have reached the present invention. That is, the present invention relates to the following inventions. [1] A binding band made of polytrimethylene terephthalate resin. [2] A binding band made of an alloy of polytrimethylene terephthalate resin and polycarbonate resin. [3] The binding band according to [1] or [2], which comprises a composition containing 0.001 to 10.0 parts by weight of a crystal nucleating agent with respect to 100 parts by weight of polytrimethylene terephthalate resin. . [4] The binding band according to any one of [1] to [3], which is formed by injection molding.

The present invention will be described in detail below. The polytrimethylene terephthalate resin (hereinafter, P
It may be abbreviated as TT. ) Is a polyester resin using mainly terephthalic acid as an acid component and trimethylene glycol as a glycol component. As the acid component other than terephthalic acid, aromatic dicarboxylic acids other than terephthalic acid, for example, phthalic acid, isophthalic acid,
2,6-naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenyletherdicarboxylic acid, diphenoxyethanedicarboxylic acid, diphenylmethanedicarboxylic acid,
Diphenyl ketone dicarboxylic acid, diphenyl sulfone dicarboxylic acid, etc .; Aliphatic dicarboxylic acid such as succinic acid, adipic acid, sebacic acid; Alicyclic dicarboxylic acid such as cyclohexanedicarboxylic acid; ε-oxycaproic acid, hydroxybenzoic acid, hydroxyethoxybenzoic acid An oxydicarboxylic acid such as an acid is exemplified. The terephthalic acid content is preferably 80 mol% or more of the acid component.

As trimethylene glycol, 1,3
-Propanediol, 1,2-propanediol, 1,
It is selected from 1-propanediol, 2,2-propanediol or a mixture thereof, but from the viewpoint of stability, 1,3-propanediol is particularly preferable, and 80 mol% or more of the glycol component is preferable. Examples of other glycol components include ethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, octamethylene glycol, neopentyl glycol, cyclohexanedimethanol, xylylene glycol, diethylene glycol, polyoxyalkylene glycol and hydroquinone. .

Further, the above-mentioned polyesters include branched components such as tricarballylic acid, trimesic acid, trimellitic acid, and other trifunctional or tetrafunctional ester-forming acids or glycerin, trimethylolpropane, pentaerythritol, and the like. The trifunctional or tetrafunctional ester-forming alcohol may be copolymerized, in which case the amount of the branching component is 1.0 mol% of the total dicarboxylic acid component.
It is preferably 0.5 mol% or less, more preferably 0.3 mol% or less. Further, PTT may be a combination of two or more of these copolymerization components.

The method for producing PTT used in the present invention is as follows:
Although not particularly limited, for example, JP-A-51-1
40992, JP-A-5-262862, JP-A-8-311177, and the like, and terephthalic acid or its ester-forming derivative (for example, lower alkyl ester such as dimethyl ester, monomethyl ester) Trimethylene glycol or an ester-forming derivative thereof is heated and reacted in the presence of a catalyst at a suitable temperature / time, and the resulting glycol ester of terephthalic acid is subjected to a desired polymerization at a suitable temperature / time in the presence of a catalyst. A method in which the polycondensation reaction is performed up to a certain degree is included.

The PTT of the present invention preferably has a number average molecular weight of 5,000 to 100,000 and Mw / Mn showing a molecular weight distribution of 1.5 to 4.5. Furthermore, it is preferable that 1 to 20% of molecules having a molecular weight of 100,000 or more are contained. The number average molecular weight and the molecular weight distribution can be measured by, for example, an osmotic pressure method, a terminal quantification method, or a GPC method (gel permeation chromatography). In particular,
Tosoh Corporation HLC-8120 as a measuring device and Showa Denko HFIP804-803 (3 as a column)
0 cm column 2), hexafluoroisopropanol (hereinafter referred to as HFIP) as a carrier, PMMA manufactured by Polymer Laboratory Co., Ltd. as a standard sample,
It can be carried out at a temperature of 40 ° C. and a flow rate of 0.5 ml / min.

FIG. 1 shows a typical polyester resin P
ET, polybutylene terephthalate resin (hereinafter PBT
May be abbreviated. ) And PTT representative isothermal crystallization rate curves are shown. PET is disclosed in JP-A-55-100.
As described in JP-A No. 138 and JP-A-57-68357, it is a material suitable for being processed into a sheet shape or a film shape by extrusion molding.
The crystallization speed of PET is very low, and for example, binding of wiring cords in buildings such as houses, automobiles and home appliances,
Alternatively, it is a material unsuitable for injection molding, which is preferably used when molding a relatively small binding band used for packing small luggage and the like. When PET is injection-molded, the crystallization rate is too low, so it is necessary to mix a specific nucleating agent, for example. Even in that case, the injection-molding conditions for obtaining a suitable binding band are complicated. Must be set to.

On the other hand, the crystallization rate of PBT is very high,
When the molten resin comes into contact with the surface of the cooled mold during injection molding, the surface layer of the molded product that comes into contact immediately crystallizes. Due to this crystallization, sink marks and flow marks are liable to occur in the injection-molded product in PBT, so that the injection molding conditions and the like for obtaining a suitable binding band require careful attention. The crystallization rate of PTT is higher than that of PET and relatively lower than that of PBT, and in injection molding of PTT, when the molten resin comes into contact with the cooled mold surface, the surface layer portion of the molded product that comes into contact is solidified in an amorphous state. The amorphous portion of the surface layer is greatly involved in obtaining a good appearance, and in PTT, the binding band can be easily injection-molded as compared with other polyester resins.

The polytrimethylene terephthalate resin of the present invention may be a mixture of polytrimethylene terephthalate and another polyester resin such as polyethylene terephthalate or polybutylene terephthalate as long as the characteristics thereof are not impaired. . The polycarbonate resin referred to in the present invention has a main chain composed of a repeating unit represented by the following formula (1).

-(O-Ar-O-CO)-(1) (In the formula, Ar is a divalent aromatic residue, for example, phenylene, naphthylene, biphenylene, pyridylene, or
Examples thereof include groups represented by the following formula (2). ) -Ar ¹ -Y-Ar ^2- (2) (In the formula, Ar ¹ and Ar ² are each an arylene group, and for example, represent a group such as phenylene, naphthylene, biphenylene, and pyridylene. Y is an alkylene group or It is a substituted alkylene group.) Further, a divalent aromatic residue represented by the following formula (3) may be contained as a copolymer component.

-Ar ¹ -Z-Ar ^2- (3) (In the formula, Ar ¹ and Ar ² are the same as those in formula (2). Z is a bond, or -O-, -CO-, -S-. , -SO
_{2 -, - CO 2 -,} - CON (R 1) - (R 1 are each independently a hydrogen atom, a lower alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, 6 carbon atoms ~ 3
It is an aryl group having 0 or an aralkyl group having 7 to 31 carbon atoms, which may be optionally substituted with a halogen atom or an alkoxy group having 1 to 10 carbon atoms. ) Is a divalent group. ) Examples of the divalent aromatic residue which is Ar in the formula (1) include those represented by the following formula.

[0017]

[Chemical 1]

(In the formula, R ⁷ and R ⁸ are each independently hydrogen, halogen, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or It is an aryl group having 6 to 30 carbon atoms.
m and n are integers of 1 to 4, and when m is 2 to 4, each R
⁷ may be the same or different, and n
When R is 2 to 4, each R ⁸ may be the same or different. Among these, a group represented by the following formula (4) is a preferred example.

[0019]

[Chemical 2]

In particular, the group represented by the above formula (4) is an Ar group.
A polycarbonate containing 85 mol% or more of the repeating units (based on all the monomer units in the polycarbonate) is particularly preferable. Further, the polycarbonate resin that can be used in the present invention may contain a trivalent or higher aromatic residue as a copolymerization component.

Although the molecular structure of the polymer terminal is not particularly limited, a phenolic hydroxyl group, an aryl carbonate group,
One or more end groups selected from alkyl carbonate groups can be attached. Among these, phenolic hydroxyl group, phenyl carbonate group, pt-butylphenyl carbonate group, p-cumylphenyl carbonate and the like are preferable as the terminal structure. In the present application, the ratio of the phenolic hydroxyl group terminal to the other terminal is not particularly limited, but from the viewpoint of obtaining better color tone and mechanical properties, the ratio of the phenolic hydroxyl group terminal is 20 of the total number of terminal groups.
% Or more, more preferably 20 to 80%. When the ratio of the phenolic terminal groups exceeds 80% of the total number of terminal groups, the thermal stability at the time of melting tends to be slightly lowered. The phenolic hydroxyl group terminal amount is generally measured by NMR (NMR
Method), a method of measuring using titanium (titanium method),
It can be determined by a method of measuring using UV or IR (UV method or IR method).

The weight average molecular weight (Mw) of the polycarbonate resin used in the present invention is generally 5,000 to 20.
It is preferably in the range of 10,000, more preferably 10,000 to 60,000, still more preferably 15,000 to 40,000, and particularly preferably 18,000 to 30,000. The weight average molecular weight (Mw) is measured by gel permeation chromatography (GPC), and the measurement conditions are as follows. That is, using tetrahydrofuran as a solvent and polystyrene gel, the conversion molecular weight calibration curve according to the following equation is used to determine from the constitutional curve of standard monodisperse polystyrene. ^{_{M PC = 0.3591M PS 1.0388 (M}} PC, M PS , respectively polycarbonate, weight average molecular weight of polystyrene)

The polycarbonate resin used in the present invention may be one produced by a known method. Specifically, for example, a known method of reacting an aromatic dihydroxy compound and a carbonate precursor, for example, reacting an aromatic dihydroxy compound and a carbonate precursor (for example, phosgene) in the presence of an aqueous sodium hydroxide solution and a methylene chloride solvent. The crystallized carbonate prepolymer obtained by the interfacial polymerization method (eg, phosgene method), the transesterification method (melting method) in which an aromatic dihydroxy compound is reacted with a carbonic acid diester (eg, diphenyl carbonate), or the phosgene method or the melting method is solidified. Phase polymerization method [JP-A-1-158033 (corresponding to US Pat. No. 4,948,871), JP-A-1-27)
1426, JP-A-3-68627 (corresponding to US Pat. No. 5,204,377)] and the like are used.

The preferred polycarbonate resin is
A polycarbonate resin containing substantially no chlorine atom, which is produced from a dihydric phenol (aromatic dihydroxy compound) and a carbonic acid diester by a transesterification method can be used. In the present invention, it is also possible to use two or more different polycarbonate resins having different structures and molecular weights in combination. The composition of the polycarbonate resin is preferably 99% by weight or less based on the total amount of the alloy. It is more preferably 70% by weight or less, and most preferably 50% by weight.
It is less than or equal to wt. In the present invention, it is preferable to add a crystal nucleating agent to the polytrimethylene terephthalate resin, or the alloy of the polytrimethylene terephthalate resin and the polycarbonate resin, which composes it, in accordance with the performance required for the target binding band. .

The crystal nucleating agent used in the present invention is preferably a known compound generally used as a crystal nucleating agent for a crystalline thermoplastic polyester resin. For example, talc, mica, boron nitride, kaolin, silica, clay, metal oxide, inorganic carboxylate, inorganic sulfonate, organic carboxylate, organic sulfonate, organic carboxylate ester salt, carbonate, α- An ionic copolymer composed of an olefin and an α, β-unsaturated carboxylic acid salt is preferably used. Among them, the fatty acid metal salt represented by the following general formula (5) is more preferably used. CH ₃ (CH ₂ ) _n COO (M) (5) (wherein n ≧ 0, M = Na, Ca, Li) Among the fatty acid metal salts, higher fatty acid Na salt, higher fatty acid Ca salt, and higher fatty acid Li Salts are more preferred. These crystal nucleating agents may be used alone or as a mixture thereof.

The amount of the crystal nucleating agent to be added needs to be appropriately selected depending on the type, combination, performance and the like of the crystal nucleating agent to be used, but 0.001 to 10.0 per 100 parts by weight of the polytrimethylene terephthalate resin. Within the range of parts by weight, the crystallization rate of the polytrimethylene terephthalate resin and the alloy of the polytrimethylene terephthalate resin and the polycarbonate resin is appropriate, which is suitable for the binding band of the present invention. In the present invention, the polytrimethylene terephthalate resin or the polytrimethylene terephthalate resin / polycarbonate resin alloy may be, if desired,
Conventionally known additives such as antioxidants, heat stabilizers, ultraviolet absorbers, release agents, lubricants, pigments, dyes, and inorganic fillers may be added to the polyester resin.

Specific fibrous inorganic fillers include glass fibers, asbestos fibers, carbon fibers, silica fibers, silica / alumina fibers, zirconia fibers, boron nitride fibers, silicon nitride fibers, boron fibers, potassium titanate whiskers. , Wollastonite, stainless steel,
Examples include metal fibrous substances such as aluminum, titanium, copper, and brass. In addition, as the powder particles, silica, quartz powder, glass beads, calcium silicate, aluminum silicate,
Kaolin, clay, silicates such as diatomaceous earth, metal oxides such as iron oxide, titanium oxide, zinc oxide and alumina, metal carbonates such as calcium carbonate and magnesium carbonate, metals such as calcium sulfate and barium sulfate. Other examples include sulfates, silicon carbide, silicon nitride, and various metal powders.

Examples of the plate shape include talc, mica, various metal foils and the like. As specific pigments, organic pigments include monoazo and condensed azo pigments, anthraquinone pigments, isoindolinone pigments, heterocyclic pigments, perinone pigments, quinacridone pigments, perylene pigments, thioindigo pigments, dioxazine pigments, and the like. To be As the inorganic pigment, carbon black, titanium oxide, titanium yellow, iron oxide, ultramarine,
Examples include cobalt blue, calcined pigments, metallic pigments and the like.

Preferred metallic pigments include aluminum, colored aluminum, nickel, tin, copper, gold,
Metal particles such as silver, platinum, iron oxide, stainless steel, titanium,
Mica pearl pigment, color graphite, color glass fiber, color glass flakes and the like can be mentioned. Of these, pearl pigments made of aluminum, nickel, tin or mica are preferable. These pigments may be used alone or in combination of two or more. The average particle size of the metallic pigment is preferably 1 to 500 μm in terms of number average particle size, and is 5 to 300 μm.
Is more preferable. When the number average particle diameter is 1 to 500 μm, the surface smoothness is excellent and the metallic color tone is vividly exhibited.

Further, within a range that does not impair the effects of the present invention, olefin resins such as polyethylene and polypropylene, polystyrene, rubber-reinforced polystyrene, acrylonitrile-styrene copolymer, styrene resins such as ABS resin,
One or more thermoplastic resins such as polyacetal, polyamides, modified polyphenylene oxide, polyphenylene sulfide and polymethyl methacrylate may be blended. In the present invention, when molding a polytrimethylene terephthalate resin, a conventionally known injection molding method is preferably used. In the present invention, the polytrimethylene terephthalate resin may be extruded into a sheet or a film and then processed into a binding band.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples. First, the polytrimethylene terephthalate resin, polybutylene terephthalate resin, polyethylene terephthalate resin, polyamide resin, nucleating agent, measurement items and measurement conditions in Examples will be described.

(1) Polyester resin a-1: Intrinsic viscosity [η] is 1.02, number average molecular weight is 9800, Mw / Mn = 2.5, 100,0
Polytrimethylene terephthalate resin in which the proportion of molecular weight of 00 or more is 5.8% The intrinsic viscosity [η] is a value obtained by the following defining equation. [Η] = lim1 / C × (η _r −1) [C → 0] In the formula, η _r is a polyester resin having a purity of 98% or more.
-The value obtained by dividing the viscosity of a diluted solution dissolved in chlorophenol at 35 ° C by the viscosity of the solvent at the same temperature, which is defined as the relative viscosity.
C is the weight (g) of the solute in 100 ml of the diluted solution. a-2: Polybutylene terephthalate resin having an intrinsic viscosity of 1.05 a-3: Polyethylene terephthalate resin having an intrinsic viscosity of 0.70

(2) Polycarbonate resin b-1: Iupilon S-2000 (manufactured by Mitsubishi Engineering Plastics) (3) Polyamide resin c-1: UBE nylon 1013B (Ube Industries Ltd.)
(4) Nucleating agent NAV-1: sodium montanate (recommon NaV)
101; manufactured by Clariant Co., Ltd.)

(5) Tensile strength: JIS K 7113 compliant tester: Tensilon UTC-3 manufactured by Orientec Co., Ltd.
OT type test piece: No. 1 shape test piece, thickness 4 mm Test temperature: 23 ° C. Tensile speed: 5 mm / min Absolute dry adjustment: Allow the test piece to stand in a desiccator coexisting with silica gel at 23 ° C. for 24 hours to adjust water absorption: The test piece is 60 at 23 ° C and 50% RH.
Leave for days to adjust

(6) Molded product surface appearance Test pieces were injection-molded continuously for 100 shots, and visually judged based on the following criteria. A: No sink mark or flow mark was generated in all 100 shots. X: There is a molded product with sink marks and flow marks.

(7) Weather resistance Using a xenon weather resistance tester (manufactured by Suga Test Instruments Co., Ltd.), IS
A weather resistance test was performed for 1000 hours under the conditions of O4892. The sample after the test was judged based on the following criteria. (A) Color difference; ΔE value (JISZ-873) using a color difference meter (Handy Color Tester HC-T manufactured by Suga Test Instruments Co., Ltd.)
0) was calculated. The smaller the value, the smaller the change in color. (B) Degree of cracking: The light-irradiated surface of the test piece was observed with a 100 × microscope, and the degree was evaluated according to the following criteria. Criteria: 0: There is no crack. 1: There are a few cracks. 2: The crack is long and clear. 3: There are 20 or more cracks in one visual field. 4: Cracks are generated all over the surface.

[0037]

Example 1 Polytrimethylene terephthalate resin (a
-1) and a crystal nucleating agent (NAV-1) were mixed in the ratios shown in Table 1, and 0.5 parts by weight of an aluminum powder having an average particle size of 60 μm (100 parts by weight of polytrimethylene terephthalate resin) was used as a colorant. Was added) and melt-kneaded using a twin-screw extruder (manufactured by Toshiba Machine Co., Ltd .: TEM35, twin-screw same-direction screw rotation type, L / D = 47.6 (D = 37 mmφ)). . At this time, the screw rotation speed is 300
rpm, cylinder temperature 260 ° C, extrusion rate 60
It was kg / Hr. The polymer was discharged in a strand form from the tip nozzle, cooled with water and cut to obtain pellets. The pellets were dried under a nitrogen atmosphere at 120 ° C for 5 hours. Using these pellets, a test piece was formed by injection molding, and the tensile strength at the time of absolute drying and at the time of absorbing water was evaluated. Molding
The resin temperature was 260 ° C and the mold temperature was 95 ° C. The evaluation results are shown in Table 1. The binding band shown in FIG. 2 was injection-molded using the pellets, and the surface appearance and weather resistance of the molded body were evaluated. Molding was performed at a resin temperature of 260 ° C. and a mold temperature of 95 ° C. The evaluation results are shown in Table 1.

[0038]

Example 2 Polytrimethylene terephthalate resin (a
-1), the polycarbonate resin (b-1) and the crystal nucleating agent (NAV-1) were mixed in the ratio shown in Table 1, and further,
The same operation as in Example 1 was carried out except that 0.5 part by weight of an aluminum powder having an average particle size of 60 μm (total weight of polytrimethylene terephthalate resin and polycarbonate resin was 100 parts by weight) was added as a colorant. The tensile strength at the time of absolute drying and water absorption, the surface appearance of the molded body and the weather resistance were evaluated. The evaluation results are shown in Table 1.

[0039]

Comparative Example 1 Polybutylene terephthalate resin (a-
2) and aluminum powder having an average grain size of 60 μm as a colorant.
5 parts by weight (100 parts by weight of polybutylene terephthalate resin) were mixed and the same operation as in Example 1 was carried out to obtain pellets. Using the pellets, the same operations as in Example 1 were performed, and the tensile strength at the time of absolute drying and water absorption, the surface appearance of the molded body, and the weather resistance were evaluated. The evaluation results are shown in Table 1.
In this comparative example, generation of flow marks was recognized.

[0040]

Comparative Example 2 Polyethylene terephthalate resin (a-
3) and an aluminum powder having an average particle size of 60 μm as a colorant.
5 parts by weight (polyethylene terephthalate resin is 100 parts by weight), and a twin-screw extruder (Toshiba Machine Co., Ltd.)
Manufactured: TEM35, biaxial same direction screw rotation type, L / D
= 47.6 (D = 37 mmφ)) was used for melt kneading. At this time, the screw rotation speed was 300 rpm, the cylinder temperature was 290 ° C., and the extrusion rate was 60 kg / Hr. The polymer was discharged in a strand form from the tip nozzle, cooled with water and cut to obtain pellets. The pellets were dried under a nitrogen atmosphere at 120 ° C for 5 hours. Using the pellets, a test piece for tensile strength measurement was prepared by injection molding under the conditions of a resin temperature of 285 ° C. and a mold temperature of 95 ° C. However, crystallization did not occur and a satisfactory molded piece could not be obtained.

[0041]

Comparative Example 3 Instead of the polytrimethylene terephthalate resin (a-1) used in Example 1, a polyamide resin (b) was used.
The same operation as in Example 1 was carried out at the weight ratios shown in Table 1 except that -1) was used to obtain pellets. Using the pellets, the same operations as in Example 1 were performed, and the tensile strength at the time of absolute drying and water absorption, the surface appearance of the molded body, and the weather resistance were evaluated. The evaluation results are shown in Table 1.

[0042]

[Table 1]

[0043]

As is clear from the examples and comparative examples, the binding band made of polytrimethylene terephthalate resin is excellent in weather resistance and surface appearance, has a small water absorption rate, and does not deteriorate in strength due to the environment. Bundling of wiring cords in buildings, etc., or automobiles, home appliances, etc.,
Further, it is suitable as a binding band used for packing luggage and the like. Further, the binding band made of polytrimethylene terephthalate resin can be easily molded by a known injection molding method and is excellent in productivity.

[Brief description of drawings]

Fig. 1 Isothermal crystallization curve of polyester resin

FIG. 2 is a front view of a binding band suitable for the present invention.

[Explanation of symbols]

1: Unity band

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI Theme Coat (Reference) C08L 69/00 C08L 69/00

Claims (4)

[Claims] 1. A binding band made of polytrimethylene terephthalate resin. 2. A binding band made of an alloy of polytrimethylene terephthalate resin and polycarbonate resin. 3. A polytrimethylene terephthalate resin 1
The crystal nucleating agent is 0.001 to 10.0 with respect to 00 parts by weight.
The binding band according to claim 1 or 2, which is composed of a composition containing parts by weight. 4. The binding band according to any one of claims 1 to 3, which is formed by injection molding.