JP2000017578A - Bag cloth and bag using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a bag cloth free from the deterioration of flexibility and waterproof with passage of time, and enabling the recycling of the cloth by coating at least one side of a specific polyester fiber-constituted base cloth with a specific polyester elastomer. SOLUTION: A base cloth having following features is fabricated: it comprises a woven knitted fabric constituted of a polyester fiber of a continuous filament of 1-20 de in single fiber deniers and 30-2000 de in the total denier; the woven knitted fabric contains at least 60 wt.% of a cation dyeable polyester fiber and at least 50 wt.% of a hollow polyester fiber; the cation dyeable polyester fiber consists of a modified polyethylene terephthalate containing at least 3 wt.% of a metal salt of sulfoisophthalic acid; the hollow polyester fiber has a percentage of hollowness of 20-50%; the woven knitted fabric has a unit area weight of 100-500 g/m2: an example of the woven knitted fabric is a weft- inserted warp-knitted fabric. At least one side of the above-fabricated base cloth is coated with a polyester elastomer having an intrinsic viscosity of 0.8-1.5 at a thickness of 5-100 μm to obtain a bag cloth having a water pressure resistance of at least 1000 mmH2O.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag fabric in which a base fabric made of polyester fiber is coated with a polyester elastomer which does not require the addition of a plasticizer, and a bag product using the bag material. More specifically, the present invention provides a bag made of a polyester-based polymer in which both a base fabric material and a resin covering the base fabric are made of a polyester polymer, and a bag such as a school bag, a business bag, and a sports / leisure bag using the bag. About the product.

[0002]

2. Description of the Related Art The required characteristics of a bag include a waterproof property and a flexibility of the bag itself. By the way, as this luggage material, at least one side of a base fabric made of polyester (homopolymer) fibers colored with a disperse dye has been coated with a vinyl chloride resin to which flexibility is added by adding a plasticizer. Things have been adopted.

[0003] However, the vinyl chloride resin to which the plasticizer is added exhibits a function with respect to required characteristics such as waterproofness and flexibility of the luggage itself, but on the other hand, the following phenomena a to d. Had been brought. a. As the vinyl chloride resin cures over time,
A reduction in the flexibility of the bag itself; b. With the passage of time, the vinyl chloride resin becomes embrittled and cracks occur in the resin layer, and the waterproofness of the bag is reduced; c. With the passage of time, foreign matter adheres to the outer surface of the resin and soils the luggage; and d. According to recent social issues, the use of vinyl chloride resin is difficult to recycle, and when incinerated, harmful substances such as dioxin are generated.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a recyclable luggage material which ensures permanent flexibility and waterproofness and is hardly soiled, and a luggage product using the same. Is to do. Still another object of the present invention is to provide a luggage material provided with at least one added value such as sharpness, light weight, or resistance to fraying, and a luggage product using the luggage material.

[0005]

Means for Solving the Problems The present inventors have studied from a completely different viewpoint to overcome the disadvantageous phenomenon described above. As a result, it was determined that the plasticizer in the vinyl chloride resin was involved in these phenomena a to c. That is, with the passage of time, the plasticizer added to impart flexibility to the resin is precipitated from the inside of the resin to the outer surface,
This causes hardening and cracking of the resin. Furthermore, the bag material is stained by the foreign material adsorption of the deposited plastic material, and therefore, in the bag product, the foreign material adsorbed by the plastic material is
It easily transfers to books and clothes contained in bags.

On the other hand, the present inventors have adopted a polyester-based elastomer which does not require the addition of a plasticizer which causes the above-mentioned adverse effects as a resin, and at the same time, have constituted a base cloth of polyester fibers, This is to eliminate the phenomena a to d.

Thus, according to the present invention, there is provided a luggage material characterized in that at least one side of a base fabric made of polyester fibers is coated with a polyester elastomer.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In order to be able to recycle the entire luggage, it is necessary that the luggage be made of substantially non-elastomeric polyester fibers.

The polymer constituting the polyester fiber is not particularly limited as long as it is a polyester-based polymer. Polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polycyclohexane dimethylene terephthalate, polyethylene-2,6-naphthalene diene Examples thereof include carboxylate and a copolymer thereof. Among them, polyethylene terephthalate or a copolymer thereof is preferable. Of course, these polymers may be mixed or copolymerized with various well-known functional agents as long as they are 20% by weight or less.

Regarding the form of this polyester fiber,
It may be a continuous multifilament or short fiber, of course,
A spun yarn containing the short fibers may be used. A preferred form is a continuous multifilament having a relatively high strength, and among them, a continuous multifilament subjected to a bulky processing such as a Taslan processing because the surface has improved wear resistance. The shape of the cross section in the longitudinal direction of the fiber may be a solid or hollow cross section, a circular or irregular shape, or a core-sheath type, a sea-island type, or a laminate with a polymer having a different composition. It may be a type.

Regarding the thickness of the polyester fiber,
From the viewpoint of strength when used as a bag, handling properties in the process of manufacturing into a fabric, and the like, the monofilament denier of the polyester fiber is preferably in the range of 1 to 20 denier, particularly 2 to 10 denier.
A denier range is preferred. For the same reason as the single fiber denier, when the polyester fiber is a multifilament or spun yarn, the total denier is 3%.
It is preferably in the range of 0 to 2000 denier, particularly 50 to 1200 denier.

As the base fabric, any fabric such as a woven fabric, a knitted fabric or a non-woven fabric can be adopted as long as it is made of the polyester fiber as described above, and a woven or knitted fabric is preferable.
The basis weight of the base fabric is preferably 100 g / m ² or more from the viewpoint of maintaining the strength of the base fabric, and is preferably 500 g / m ² or less from the viewpoint of maintaining the flexibility of the base fabric.

Next, the polyester elastomer in the luggage material of the present invention will be described. The polyester-based elastomer of the present invention mainly comprises a high-melting crystalline polymer (hard segment) and a low-melting polymer (soft segment) composed of an aliphatic polyether unit and / or an aliphatic polyester unit. Any polyester block polymer may be used.

Preferred hard segments include terephthalic acid, isophthalic acid, phthalic acid, naphthalene-2,
Dicarboxylic acids such as 6-dicarboxylic acid and ester-forming derivatives thereof, and aliphatic diols having 2 to 15 carbon atoms in the main chain, and alicyclic rings such as 1,1-cyclohexanedimethanol and 1,4-dicyclohexanedimethanol Polyesters formed from diols such as aromatic diols such as aromatic diols, xylylene glycol, and bis (p-hydroxy) diphenyl, and ester-forming derivatives thereof. Particularly preferred is polybutylene terephthalate.

Preferred soft segments include polyalkylene glycols having a molecular weight of 1,000 or more, such as polyethylene glycol and polytetramethylene glycol, and ester-forming derivatives thereof, and aliphatic diols having 2 to 15 carbon atoms in the main chain and esters thereof. Polyester having at least a part of a forming derivative or an aliphatic dicarboxylic acid having 2 to 15 carbon atoms in the main chain and an ester forming derivative thereof.

Among these polyester elastomers, polybutylene terephthalate in which terephthalic acid, tetramethylene glycol component and tetramethylene glycol component are at least 60 mol% with respect to all dicarboxylic acid components and all alkylene glycol components, respectively. And a melting point of 100
A soft segment comprising an aromatic dicarboxylic acid component and a long-chain diol having 5 to 15 carbon atoms between the hydroxyl group and the hydroxyl group, which is less than 20 ° C or amorphous. The ratio by weight is most preferable because the elastomer itself has high stain resistance and weather resistance.

In the production of such an elastomer, first, a polymer constituting each of the soft segment (S) and the hard segment (H) is prepared, and then the melting point of the elastomer obtained by melting and mixing the two is adjusted to the hard segment (H). ) May be adjusted so as to be lower than that of).

Since the melting point varies depending on the mixing temperature and time, a method is also employed in which a catalyst deactivating agent such as phosphorus oxyacid is added to deactivate the catalyst when the desired melting point is reached. For example, in all stages, the phosphoric acid is equimolar or more, preferably 1.2 times or more and less than 3 times the number of metal atoms of the titanium or tin compound added as a catalyst to the hard segment (H) or the soft segment (S), Phosphorous acid, organic sulfonic acid and the like are added.

The elastomer obtained finally has an intrinsic viscosity of at least 0.6, especially in the range of 0.8 to 1.5, measured in orthochlorophenol at 35 ° C.

Of course, the elastomer itself may contain functional agents such as stabilizers, pigments, dyes, nucleating agents, lubricants and flame retardants.

Further, a method of manufacturing a luggage material according to the present invention will be described. The luggage material of the present invention can be obtained by coating and laminating and / or impregnating the above-mentioned elastomer on a base fabric made of polyester fiber. For the lamination or impregnation method, a means well known in the art may be employed.For example, a molten polyester elastomer is extruded on the surface of the base fabric, and at least one of the elastomer is pressed into the base fabric while being pressed against the base fabric. Method of pressing and joining parts (so-called melt lamination method), method of joining an elastomer formed into a sheet by a T-die or calendering method using an appropriate anchoring agent (so-called dry lamination method), A method of dipping in a solution (so-called dip method), a method of applying an elastomer solution to one side surface of a base fabric (so-called knife coater method), and the like can be given. Among them, the extrusion lamination method and the dry lamination method in which the production process is relatively simple are preferable.

The amount of the elastomer applied to the base fabric slightly varies depending on whether the applying means is lamination or impregnation. For example, in the case of lamination, the thickness of the elastomer is an important factor. That is, the thickness of the elastomer layer is preferably 100 μm or less from the viewpoint of the flexibility of the entire bag, and the lower limit thereof is preferably 5 μm or more from the viewpoint of waterproofness. Here, the thickness of the elastomer layer is a linear distance from the surface of the base fabric to the outer surface of the elastomer layer on one side of the bag, and in the case of both sides, each side may be within this range. . On the other hand, in the impregnation mode, the weight ratio of the elastomer to the base fabric is an important factor. For the same reason as the thickness described above, the preferred weight ratio of the two is in the range of 1: 0.1 to 1, especially 1: 0.2 to 5.

The luggage material of the present invention obtained as described above has sufficient flexibility with respect to a luggage material utilizing a conventional vinyl chloride resin even if the resin is not substantially added with a plasticizer. The use of the polyester elastomer has no deterioration in flexibility and waterproofness over time, and is resistant to dirt. Moreover, since the matrix polymer of the fibers constituting the base fabric is polyester, recycling is possible.

Further, another object of the present invention is sharpness,
The requirements for imparting added value such as light weight or hot resistance will be described.

<Requirements for Clarity> Conventionally, in a bag fabric, a base fabric surface having a warm texture and appearance is arranged outside the bag, while a resin surface for imparting waterproofness is provided inside the bag. The ones that have been mainly adopted have been adopted. Therefore, it is very preferable that the base fabric itself has a high degree of clarity in order to improve the color appearance of the bag.

Therefore, the polyester fiber constituting the base fabric is a dyeable cationic dyeable polyester fiber (hereinafter, referred to as a polyester fiber) colored with a cationic dye having higher sharpness as compared with a polyester fiber colored with a conventional disperse dye. (Abbreviated as “CDF”). Regarding the amount of CDF contained in the base fabric, it is preferable that the CDF occupies at least 60 wt%, particularly 80 wt% or more based on the weight of the base fabric.

The polymer composition of the CDF includes:
Any cationic dye can be used as long as it is dyeable. Examples thereof include polyester fibers obtained by copolymerizing an isophthalic acid component containing a metal sulfonate (Japanese Patent Publication No. 34-10497), and polyester fibers obtained by copolymerizing an isophthalic acid component having a phosphonium sulfonate group ( JP-B-47-22334). Preferably, polyethylene terephthalate is used as a matrix polymer, and at least 3 wt% of terephthalic acid residues in the matrix polymer is isophthalate having a sulfonic acid metal salt in view of mechanical properties such as strength and stability in a spinning process. It has been substituted with an acid residue. On the other hand, the upper limit of the substitution amount of the isophthalic acid residue is preferably at most 15 wt%. Further, such a base cloth, when a resin is coated on the base cloth in a heated state, a polyester fiber colored by a conventional disperse dye,
The problem that the dye migrates from inside the fiber to the resin, that is, the color migration does not occur.

Further, since the elastomer provided on at least one side of such a base fabric has an optical refractive index lower than that of the CDF, the base fabric surface provided with the elastomer,
That is, even inside the bag, vivid color effects are further enhanced through the elastomer.

<Light Weight> It is very preferable that a light weight is used for a bag carried by a person. Therefore, the polyester fiber contained in the base fabric is preferably a hollow polyester fiber having at least 50% by weight, based on the weight of the base fabric, having a hollow portion having a hollow ratio of 20 to 50%. Particularly preferred is a hollow polyester fiber having at least 70 wt% of hollow portions having a hollow ratio of 30 to 50%.

The cross-sectional shape of the hollow polyester fiber may be any shape, but the hollow portion is substantially closed by the matrix polymer constituting the polyester fiber since the hollow polyester fiber can maintain lightness even when immersed or wet. Are preferred. The manufacture thereof is described in Japanese Utility Model Publication No. 43879/1990 and Japanese Patent Laid-Open No. 6-2210.
The spinneret disclosed in Japanese Unexamined Patent Application Publication No. HEI 10-205 may be used. In this case, when the CDF is used as the polyester fiber (another embodiment B of the present invention), a bag with added two added values of clarity and light weight can be obtained.

A bag containing such a hollow polyester fiber could not be formed by a conventional bag made of solid polyester fiber by appropriately adjusting the amount of resin film.
It has excellent lightness with an apparent specific gravity of 1.0 or less. Moreover, the luggage containing such a hollow polyester fiber has improved wrinkling resistance at the stage of being made into luggage as compared with the conventional solid polyester fiber.

<Requirements for Anti-Fraying> In the case of a bag carried by a person outdoors, complicated sewing is facilitated in terms of the shape and appearance and the portability is easy to carry. Preferred.

For this reason, the structure constituting the base fabric is a material in which continuous multifilaments or spun yarns constituting the base fabric are tightly entangled with each other, compared with a fabric structure in which warps and wefts are simply crossed. It is preferable to use a warp-knitted material in which slippage is unlikely to occur, and among them, a warp-knitted material into which a weft is inserted. Such a bag material is very easy to sew because the cut surface is not frayed even when it is cut for sewing on a bag, and is very suitable for complicated sewing. The fraying here is, for example, a phenomenon in which the yarn constituting the base cloth existing on the end face when the bag is cut off falls off the bag.

The requirements for sharpness, lightness or fray resistance may be used singly or in combination. The means for solving the first object of the present invention, that is, the base made of polyester fiber, Assuming that the bag material in which the cloth is covered with the polyester elastomer is the embodiment A of the present invention,
From the viewpoint of the cross section of the original yarn and the combination with the structure of the base fabric, it is arranged as follows.

[0035]

[Table 1]

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments. The physical properties of the fabrics in the examples were measured by the following methods.

(1) Resistance to fraying A waterproof sample is cut into a length of 10 cm and a length of 5 cm to prepare a rectangular sample, and a 5 cm long side portion is gripped with a chuck. It is fixed at a position 3 cm above the iron plate installed in the horizontal direction, the chuck is horizontally moved 5 cm each before and after in the thickness direction of the sample, and this is repeated 300 times / 10 minutes in a reciprocating manner. , I confirmed the fray. The results were shown as ○ when there was no fray at all, Δ when there was some fray, and X when the yarn was completely dropped.

(2) Apparent Specific Gravity The basis weight (g / m ² ) and thickness (mm) of the cloth were measured, and the apparent specific gravity was calculated by the following equation. Apparent specific gravity = weight / (thickness x 10 ^-2 )

(3) Stain resistance Stain resistance to coffee, soy sauce and acetone was evaluated based on JIS K6902. The results were shown as ○ when there was no change, Δ when there was a slight change in gloss, and X when there was a strong change.

(4) Weather Resistance Using a sunshine weather meter according to JIS K7102, the surface condition of the sample on the resin surface after 1,500 hours without rain at 63 ° C. was evaluated. The results were shown as ○ when there was no change, Δ when there was a slight change in gloss, and X when there was a strong change.

(5) Heat resistance Evaluation was made at a test temperature of 180 ° C. and boiling water based on JIS K6902. The results were shown as ○ when there was no change, Δ when there was a slight change in gloss, and X when there was a strong change.

Reference Example 1 Production of polyester elastomer 180 parts of dimethyl terephthalate, dimethyl sebacate 2
After transesterification of 0 part, 140 parts of tetraethylene glycol and 30 parts of diethylene glycol with a dibutyltin diacetate catalyst, polycondensation was performed under reduced pressure to obtain a polyester (S) having an intrinsic viscosity of 1.01. To this polyester (S), chips of polybutylene terephthalate (H) having an intrinsic viscosity of 0.98 were dried, and 170 parts were added.
After further reacting at 40 ° C. for 45 minutes, 0.1 part of phenylphosphonic acid was added to stop the reaction. This elastomer had a melting point of 192 ° C. and an intrinsic viscosity of 1.02.

Reference Example 2 Production of Polyester Elastomer 180 parts of dimethyl isophthalate, dimethyl sebacate 2
After transesterification of 0 parts and 170 parts of hexamethylene glycol with a dibutyltin diacetate catalyst, polycondensation was performed under reduced pressure to obtain a polyester (S) having an intrinsic viscosity of 1.06. A chip of polybutylene terephthalate (H) having an intrinsic viscosity of 0.98 is dried on the polyester (S),
After adding 107 parts and further reacting at 240 ° C. for 45 minutes, 0.1 part of phenylphosphonic acid was added to stop the reaction. This elastomer had a melting point of 204 ° C. and an intrinsic viscosity of 1.07.

Reference Example 3 Production of Polyester Elastomer Polyester elastomer was converted to dimethyl terephthalate 6
5 parts, polytetramethylene glycol (average molecular weight 10
00) 120 parts and tetramethylene glycol 61 parts were polymerized by a conventional method using tetrabutoxytitanate as a catalyst to obtain a polyester elastomer. The intrinsic viscosity of this elastomer was 1.42.

Example 1 5 wt% of dicarboxylic acid residues
From polyethylene terephthalate having an intrinsic viscosity of 0.67 substituted with sodium sulfoisophthalate residue,
40 denier / 192 filament hollow cationic dye-dyeable polyester fiber with a hollow cross section (hollow rate 33%,
Solid cationic dyeable polyester fiber with a strength of 5.1 g / de and an elongation of 14.5% and a solid cross section of 75 denier / 24 filaments (a strength of 4.5 g / de and an elongation of 16).
%), And using a weft inserting Russell knitting machine (18G), the hollow cationic dye-dyeable polyester fiber is coated on the reed L3 such that L3 has a 00/00 texture.
The solid cationic dye-dyeable polyester fiber was fed to the reeds L1 and L2 as entangled yarns, and L1 was 32/21/10/12 and L2 was 1
In order to obtain a structure of 0/12/23/21, the bar is supplied all-in with 2 bars, and the hollow cationic dye-dyeable polyester fiber is 30 / i as an insertion weft.
The knitted fabric was knitted so as to have a density of n. The ratio of the hollow cationic dye-dyeable polyester fiber to the solid cationic dye-dyeable polyester fiber in the knit is 81:19.
Met. The warp-knitted fabric with the inserted weft was dyed with a cationic dye (“AIZEN Cation DP” manufactured by Ho Otani Chemical Co., Ltd.) to obtain a colored base fabric.

The elastomer of Reference Example 1 was melt-laminated on the surface of the base fabric to form a film made of a polyester block copolymer having a thickness of about 30 μm, thereby completing a waterproof fabric. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 2 The same operation as in Example 1 was repeated, except that the polyethylene terephthalate of Example 1 was changed to a homopolymer and the dye was changed to a disperse dye ("Sumicaron" manufactured by Sumitomo Chemical Co., Ltd.). . Table 2 shows various characteristics of the obtained waterproof fabric.

Example 3 The same operation as in Example 1 was repeated, except that the cross section of the hollow cationic dye-dyeable polyester fiber used in Example 1 was changed to a solid. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 4 The hollow cationic dye-dyeable polyester fibers used in Example 1 were each treated with 40 fibers /
The same operation as in Example 1 was repeated, except that the fabric woven at a density of inches and 35 yarns / inch was used as the base fabric. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 5 The same operation as in Example 1 was repeated except that the cross section of the hollow polyester fiber used in Example 2 was changed to a solid. Table 2 shows various characteristics of the obtained waterproof fabric.

[Example 6] The hollow polyester fibers used in Example 2 were processed at 40/35 and 35 /
The same operation as in Example 1 was repeated except that the woven fabric woven at a density of inches was used as the base fabric. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 7 The same operation as in Example 1 was repeated except that the cross section of the hollow polyester fiber used in Example 4 was changed to a solid. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 8 The same operation as in Example 1 was repeated, except that the cross section of the hollow polyester fiber used in Example 6 was changed to a solid. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 9 The same operation as in Example 1 was repeated, except that the elastomer of Reference Example 1 used in Example 8 was changed to the elastomer of Reference Example 2. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 10 Reference Example 1 used in Example 8
The same operation as in Example 1 was repeated except that the elastomer of Example 3 was changed to the elastomer of Reference Example 3. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 11 The same operation as in Example 5 was repeated except that the inserted weft was not used. Table 2 shows various characteristics of the obtained waterproof fabric.

Example 12 The same operation as in Example 1 was repeated, except that the inserted weft was not used and L3 was supplied so as to be 00/66. Table 2 shows various characteristics of the obtained waterproof fabric.

Comparative Example 1 The same operation as in Example 1 was repeated, except that the elastomer of Reference Example 1 used in Example 8 was changed to a commercially available soft vinyl chloride sheet to which a plasticizer was added. Table 2 shows various characteristics of the obtained waterproof fabric.

[0059]

[Table 2]

Consider Table 2 below. Unlike the comparative example 1 using the vinyl chloride sheet to which the plasticizer is added, the embodiment of the present invention has permanent flexibility and waterproofness because there is no precipitation of the plasticizer over time, and It was hard to get dirty. In addition, since both the base fabric and the resin covering the base fabric are made of a polyester resin, the recyclability is excellent. Further, there is no problem of heat resistance such that the film observed with the vinyl chloride resin of Comparative Example 1 melts at 180 ° C. and changes its shape at the evaluation of boiling water, and the water pressure is sufficient for use at a water pressure of 1000 mmH ₂ O or more. It had water resistance.

Further, as the elastomer, a hard segment (H) composed of polybutylene terephthalate in which the terephthalic acid component and the tetramethylene glycol component are each at least 60 mol% based on the total dicarboxylic acid component.
And a long-chain diol component having 5 to 15 carbon atoms in the main chain between the aromatic dicarboxylic acid component and the hydroxyl group, and having a melting point of less than 100 ° C or a non-crystalline polyester. And the composition ratio (weight) of both of them is H: S = 20: 80.
In Examples 1 to 9, 11 and 12 using those having a polyalkylene glycol content of up to 70:30, the stain resistance and weather resistance were higher than those of the elastomer having the polyalkylene glycol of Example 10 as a soft segment as well as Comparative Example 1. showed that.

Regarding the sharpness, the luggage of Examples 1, 3, 4, 7, and 12 in which cationic dye-dyeable polyester fibers colored with a cationic dye were arranged as the polyester fibers were compared with the other luggage. It has vivid colors, and
In other bags, when the elastomer was melt-extruded onto the base cloth, the disperse dye partially migrated to the elastomer, but in the bags of Examples 1, 3, 4, 7 and 12, the migration of the cationic dye was observed. Had not occurred.

Regarding the lightness, the luggage of Examples 1, 2, 4, 6, and 12 using hollow polyester fibers were all very light, having an apparent specific gravity of 1.0 or less as compared with other luggage. It was excellent and hard to wrinkle.

Regarding the fraying resistance, the luggage of Examples 1-3, 5 and 12 using a warp knitted fabric with a weft insertion as the base fabric is as follows.
Compared to other luggage, even when the cut surface was rubbed, there was no fray of the base cloth, and when sewn it to a luggage, the workability was very good.

[0065]

The luggage material according to the present invention has a sufficient flexibility even when the resin is not substantially added with a plastic material, as compared with a luggage material using a conventional vinyl chloride resin. In addition, since there is no decrease in waterproofness and the dirt is hardly adhered, and since the matrix polymer of the fibers constituting the base fabric is polyester, it can be recycled. Further, in the present invention, added value such as clarity, anti-fraying property and light weight can be imparted to the bag, and it is suitable for school bags, business bags, sports and leisure bags, and the like.

Claims (19)

[Claims] 1. A luggage material, wherein a polyester-based elastomer is coated on at least one side of a base fabric made of polyester fibers. 2. The luggage according to claim 1, wherein at least 60 wt% of the weight of the base fabric is occupied by cationic dye-dyeable polyester fibers colored with a cationic dye. 3. The cationic polymer dyeable polyester fiber matrix polymer is polyethylene terephthalate in which at least 3% by weight of dicarboxylic acid residues are substituted with isophthalic acid residues having a metal salt of sulfonic acid. Baggage. 4. The luggage material according to claim 1, wherein at least 50 wt% of the weight of the base fabric is occupied by hollow polyester fibers having a hollow ratio of 20 to 50%. 5. The luggage according to claim 4, wherein the hollow portion is closed by a matrix polymer constituting the polyester fiber. 6. The luggage according to claim 4, wherein the apparent density of the luggage is at most 1.0. 7. The monofilament denier of the polyester fiber,
7. The method according to claim 1, wherein said denier is in the range of 1 to 20 denier.
Bags described in section. 8. The polyester fiber is a continuous multifilament and has a total denier of 30 to
8. The method as claimed in claim 1, wherein the density is in the range of 2,000 denier.
Bags described in section. 9. The luggage according to claim 1, wherein the base fabric is a woven or knitted fabric. 10. The luggage according to claim 9, wherein the woven or knitted fabric is a warp knitted fabric. 11. The luggage according to claim 10, wherein the warp-knitted fabric is a warp-knitted warp-knitted fabric. 12. The basis weight of the base cloth is 100 to 500 g /
bag fabric as claimed in any one of claims 1 to 11 in the range of m ^2. 13. An elastomer having an intrinsic viscosity of from 0.8 to 0.8.
The luggage according to any one of claims 1 to 12, which is in a range of 1.5. 14. The luggage material according to claim 1, wherein the elastomer is laminated on the base fabric with a thickness in a range of 5 to 100 μm. 15. The waterproof pressure of the bag is at least 1000.
bag fabric as claimed in any one of claims 1 to 14 mmH a ₂ O. 16. An elastomer comprising a hard segment (H) comprising a polybutylene terephthalate in which a terephthalic acid component and a tetramethylene glycol component are each at least 60 mol% based on the total dicarboxylic acid component, an aromatic dicarboxylic acid component and hydroxyl. A soft segment (S) consisting of a polyester having a long chain diol component having 5 to 15 carbon atoms in the main chain between the group and the hydroxyl group, and having a melting point of less than 100 ° C. or amorphous. Is H: S = 20: 80-70:
The luggage according to any one of claims 1 to 15, which is in a range of 30. 17. A schoolchild bag comprising the bag material according to any one of claims 1 to 16. 18. A business bag comprising the bag material according to any one of claims 1 to 16. 19. A sports / leisure bag comprising the bag of any one of claims 1 to 16.