JPH0359163A - Sail cloth - Google Patents

Abstract

PURPOSE:To provide a sail cloth having a specific tear strength and an elongation by weaving a cloth with a blended yarn comprising plural kinds of filaments which have a difference between the melting points thereof and at least one kind of which comprises polyester filaments having a specific single filament fineness and subsequently forming a specified resin coating film on at least one surface of the formed cloth. CONSTITUTION:A blended yarn comprising at least two kind of filaments at least one of which are polyester filaments having a single filament fineness of at least 1 denier and have a difference between the melting points thereof is formed. The blended yarn is employed as at least one of warp and weft and woven into woven fabric, on whose at least one side a resin coating film comprising the resin of the filaments melting at a lower temperature than the polyester filaments constituting the blended yarn is formed, thereby providing a sail cloth having a light weight, excellent flex resistance and flexing resistance, tear strengths of >=1.0kg in both the warp and weft directions, a bias elongation of <=2% under a load of 20 pound per 2.5cm wide and having a low elongation in spite of the high tear strength.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a highly durable sailcloth for sailboats, windsurfing, etc.

[Prior Art] In recent years, synthetic fiber filament yarn fabrics have been widely used as fabrics for sailcloths, and among them, polyester filament yarn fabrics are most commonly used.

Such sail cloths can be roughly classified into three types: a resin-impregnated type in which a cloth is impregnated with a resin, a laminate type in which a film is laminated or adhered to a cloth, and a mono-film type consisting of a sheet of film alone.

[Problem to be Solved by the Invention 1] However, all of these conventional sail cloths have the drawback of being weak in bending resistance and rubbing resistance.

In other words, the resin-impregnated type has the disadvantage that the resin easily peels off or falls off when bent or rubbed.Furthermore, since this type uses high-density fabric, it is too heavy and difficult to handle, making it difficult to capsize boats, etc. The drawback was that it was sometimes difficult to pull up.

In addition, some film laminate types have a polyester biaxially stretched film laminated on both sides or one side of the fabric via a polyurethane adhesive, but in this type the film is susceptible to bending and rubbing, and the base fabric It has the disadvantage that it easily peels off at the interface with the film and is also prone to tearing at the film portion.

Furthermore, the monofilm type had the disadvantage that the film itself was weak against external forces such as bending and rubbing, and its tear strength was low.

SUMMARY OF THE INVENTION In view of the drawbacks of conventional sail cloths, it is an object of the present invention to provide a sail cloth that is lightweight, strong against bending and rubbing, and has excellent durability and is resistant to tearing.

[Means for Solving the Problems] The present invention has the following configuration to achieve the above object.

That is, the sail cloth of the present invention is a woven fabric in which at least one of the warp and weft yarns is a mixed yarn consisting of at least two or more types of filament yarns having a difference in heat melting temperature, at least one of which is a polyester filament yarn. Among the filament yarns that have a resin coating on at least one side and constitute the mixed fiber yarn, the single filament fineness of the filament yarn made of polyester is at least 1 denier, and the filament yarn can be used at a lower temperature than that of the polyester filament yarn. It is characterized in that it is made of a sheet in which the resin coating is constituted by a resin of filament threads that melts.

Alternatively, the sail cloth of the present invention uses a mixed fiber yarn consisting of at least two or more types of filament yarns having a difference in heat melting temperature, at least one of which is a polyester filament yarn, for at least one of the warp and weft yarns. The fabric has a resin coating on at least one side,
and the resin coating is a sail cloth made of a sheet made of filament yarn resin that melts at a lower temperature than the polyester filament yarn, and the tear strength of the sheet in both the vertical and horizontal directions is 1°0 kg or more. It is characterized in that the elongation in the bias direction under a load of 20 pounds of tensile force per elongation width of 2.5 cm is 2% or less.

[Function] The mixed fiber yarn forming the sail cloth of the present invention is a mixed fiber yarn composed of two or more types of filament yarns that melt at different temperatures when heated, and one of the filament yarn components is a polyester filament yarn. It is made up of.

This mixed fiber yarn is composed of, for example, a polyester filament yarn (B) whose thermal melting temperature is relatively high, and a filament yarn (A) which melts at a lower temperature than this polyester filament yarn (B), and which Either one component or both components may be composed of a plurality of types of filament yarn components, or they may be mixed as separate mixed yarns.

The present invention provides a sail cloth with excellent dimensional stability when wet by using polyester filament yarn (B) as the main component of the fabric structure that is the skeleton of the sail cloth. be.

On the other hand, if a filament yarn such as nylon that swells or stretches in the presence of water is used as the filament yarn (B), for example, when it gets wet with water, the dimensions will change by about 3% or more, and the shape of the sail will change. It has the disadvantage of being undesirable as a sail cloth.

Polyester filament yarn (B) used in the present invention
For example, filament yarns made of homopolyesters such as polyethylene terephthalate and polybutylene terephthalate, which have excellent strength and non-water swelling properties, are preferable, but copolymerized components may also be used as long as the effects of the present invention are not impaired. or mixtures may be present.

In the sailcloth of the present invention, the physical properties of the fabric may be affected by the characteristics of the polyester filament yarn (B) component described above, so the specifications of the polyester filament yarn (B) component should be carefully determined. be. For example, the fineness of the polyester filament yarn (B) component in the mixed yarn is preferably about 1 denier or more, more preferably 1.5 denier or more, in order to improve the physical properties of the fabric. Desirable from above. If the polyester filament yarn (B) component is a thin fiber with a single filament fineness of less than 1 denier, it may lack the bending resistance, kneading resistance, and tear strength required for sail cloth, or the filament yarn ( When component A) is melted, there is a possibility that the component will be melted at the same time, which tends to increase the risk of decreasing fiber strength and changing elongation, which is generally undesirable. Therefore, in the present invention, when using a polyester filament yarn (B) with a single yarn fineness of less than 1 denier, it is important to take measures such as increasing the number of fibers used.

A more preferred embodiment of the polyester filament yarn (B) of the present invention is a yarn such as a filament formed from a highly polymerized polymer, a filament strongly drawn at a high draw ratio, or a filament made highly strong by other physical treatments. is to use. Specifically, it is preferable to use a polyester filament yarn (B) having a single yarn strength of preferably 6 g/d or more, more preferably 7 g/d or more, in order to realize an excellent sail cloth.

The woven fabric constituting the sail cloth of the present invention is not particularly limited, but is preferably a hand-woven fabric in which the mixed yarn is used for at least one, preferably both, of the warp and weft. Of course, those with a modified plain weave structure are also preferred. Fabrics with a plain weave structure are the most preferable sailcloths because they have superior elongation properties, strength properties, flatness, and transparency compared to fabrics with other woven structures such as diagonal weave and satin weave. be.

The number of yarns constituting such a fabric is preferably 50 to 300.
Use a material in the denier range, and the weave density is preferably 5.
The range is preferably from 0 to 200 lines/inch.

Also, the fabric weight is preferably 300g/r+? below,
More preferably, the content is 80 to 200 g/%, since this makes it possible to realize a sail cloth that is light and easy to handle.

The sail cloth of the present invention has a woven fabric skeleton composed of polyester filament yarn (B),
At least one side thereof has a sheet structure in which at least the interstitial portions (eyelets and fiber gaps) of the woven fabric are made continuous with a resin coating made of a resin constituting the filament yarn (A).

Such a sheet structure can be formed by once weaving a fabric using the above-mentioned mixed fiber yarn, and then heating at least one side to melt the filament yarn (A) and form a film.

The above-mentioned coating is preferably carried out only on one side, and the other side is left as a mixed fiber yarn or as a mixture of filament yarn (A) and polyester filament yarn (B) (in a fiber state). It is better to leave it there.

According to the findings of the present inventors, by creating a substantially two-layer cross-sectional structure with different structures on the front side and back side, it is possible to easily improve the tear strength to 1.0 kg or more, Both the front side and the back side have filament thread (
When coated with the resin of component A), the tear strength tends to decrease.

However, even if both sides are coated, it is possible to obtain a more practical sail cloth depending on how the mixed fiber yarn is selected. It's also good. That is, even if both sides are coated, for example, by using a high tenacity yarn of preferably 6 g/d or more as the polyester filament yarn (B), or by using a yarn whose tenacity is less likely to decrease due to heat, the above-mentioned results can be obtained. A product with satisfactory tear strength can be obtained. Such double-sided coated cloth can exhibit the great advantage of effectively preventing water from entering the cloth due to capillary action, and is therefore practical and practical.

Note that this advantage is exhibited at a high level even in the above-mentioned one-sided coated cloth, although it is slightly inferior to the double-sided coated cloth. That is, this waterproof property is extremely superior to sail cloth made of conventional film laminated cloth, and can be said to be a characteristic performance of the sail cloth of the present invention.

A composite spinneret is used as the mixed fiber yarn used in the present invention, and a polymer (A) that melts at a low temperature constituting the filament (A) and a polymer constituting the polyester filament yarn (B) that melts at a relatively high temperature are used. (B) is spun from separate nozzles and mixed at the time of spinning, or after spinning polymer (A) and polymer (B) separately, both yarns are mixed together in a composite manner. can be used as appropriate.

In the mixed yarn, the filament yarn (A) and the polyester filament yarn (B) preferably have a weight ratio (A/B) of 10/90 to 70/30. More preferably 30/70
-50150 is preferred.

If the amount of mixed filament yarn (A) is too small, it is difficult to obtain a durable coating, and if the amount of polyester filament yarn (B) is too small, the strength tends to be poor.

Such filament yarn CA) is soft, resistant to bending and impact, and has high tear strength.
This is preferable because it provides a resin coating with good film properties. Of course, it goes without saying that it is preferable to select a material that has good adhesion to the polyester filament yarn (B). On the other hand, materials such as polystyrene which are hard, weak against bending and impact, and have low tear strength are generally not preferred.

Examples of such filament threads (A) include polypropylene, polyethylene, polyurethane, copolymers thereof, nylon, nylon copolymerized with polyalkylene glycol, dicarboxylic acids, amines, etc., and polyester repeating units. It is possible to use copolymerized aliphatic dicarboxylic acids such as isophthalic acid, 5-sodium sulfoisophthalic acid, or adipic acid as the acid component, or copolymerize polyalkylene glycol as part of the alcohol component. The polymer is not limited to these as long as it has the properties required for the filament yarn (A) described above.

However, among these filament yarns (A), polyester polymers are preferred from the viewpoint of water-swellability and dimensional stability when wet with water.

In the sail cloth of the present invention, the filament yarn (A) component is melted and formed into a film by receiving heat from the outside, but at this time, the polyester filament yarn (B) forming the skeleton is kept under conditions that do not cause thermal deterioration as much as possible. It is preferable to perform a coating treatment. That is, filament yarn (A
), the greater the melting temperature difference than the polyester filament yarn (B), the less adverse effects of heat on the polyester filament yarn (B), so preferably the melting temperature difference is 20°C. As described above, by using a mixed yarn having a temperature of more preferably 30° C. or higher, a durable sail cloth with excellent textile properties can be provided.

The types of mixed fiber yarn used in the present invention include, for example, a uniform mixed fiber type, a bimetallic type that is biased to one side, or a polyester filament yarn (
A composite yarn such as a core-sheath type in which B) is arranged in the core and filament yarn (A) in the sheath can be used. Among these, the latter type, particularly the core-sheath type mixed fiber yarn, is preferred. These mixed fiber yarns may be further subjected to fluid entanglement treatment or the like.

In the present invention, a woven fabric using the above-mentioned mixed fiber yarn is heat-treated and at least one side of the woven fabric is coated with a resin constituting the filament yarn (A). It is preferable that a large amount of filament yarn (A) exists on the surface of the fabric because it is easier to form a resin coating and a uniform coating is easily formed.

As for the mixed fiber yarn that forms the surface of such a fabric, polyester filament yarn (
It is preferable to use a filament yarn (A) having a longer yarn length than B).

After such water filling treatment, the following method can be used to impart a yarn length difference to the mixed fiber yarn.

That is, (2) a method of combining polymers with different heat shrinkage properties, using a polymer with high heat shrinkage for the polyester filament thread (B) and a polymer with low heat shrinkage for the filament thread (A).

■A method of spinning filament yarn (A) and polyester filament yarn (B) separately, then subjecting only the filament yarn (A) to relaxation heat treatment to reduce heat shrinkage, and then mixing it with polyester filament yarn (B). .

■A method of mixing filament yarn (A) with overfeed using a turbulent air nozzle compared to polyester filament yarn (B).

Examples include.

It is preferable that the difference in yarn length of such a mixed fiber yarn after water treatment is 2% or more. Here, the yarn length difference is expressed by the following formula, where the shrinkage rate of the polyester filament yarn (B) is 81 and the contraction rate of the filament yarn (A) is 82.

−8 Yarn length difference (%) = ” You can.

For example, a fiber yarn (A') different from the filament yarn (A) component used in the mixed fiber yarn constituting the fabric, for example, one that melts at a lower temperature or has excellent skin properties and adhesive properties. Fiber yarn (filament or staple)
(A') can be mixed or spun, or such fiber threads can be mixed or interwoven. In this way, the resin coating can be further supplemented and reinforced.

Further, another fiber thread having fiber physical properties superior to that of the polyester filament yarn (B) can be used in addition to the mixed fiber yarn, and in this case, the physical properties of the fabric can be appropriately improved.

Further, yarns of different colors or yarns having different dyeing properties can also be used in appropriate combination.

In obtaining the sail cloth of the present invention, the heat treatment method for forming a coating on one or both sides of the fabric may be any method that can heat and melt the filament yarn (A) component on one or both sides of the fabric to form a coating. Although not particularly limited, the following methods can be used.

That is, for example, there is a method in which a mixed yarn fabric is heated with a hot air heating type pin tenter to receive heat on one or both sides to melt the filament yarn (A), and then the molten polymer is pressurized, or the fabric is Preferably used is a hot press method in which the filament yarn (A) is melted by receiving heat from one or both sides, and at the same time the molten polymer is pressed and spread onto a flat surface to form a film.

For forming a film on one side, the thermal calendar method is particularly preferable from the viewpoint of film formation properties and film properties, and it is particularly preferable to process the surface opposite to the heat-melted surface in a cooled state using a cooling roll or a cooling press plate. It is preferable. According to this method, it is possible to accurately make the mixed fiber yarn exist as a fiber thread on the cooling surface side.

Furthermore, it is also preferable that the mixed fiber yarn or fabric of the present invention is subjected to low-temperature plasma treatment before the above-mentioned heat treatment. That is, such treatment can further improve the properties of the resin coating and the adhesion between the base fabric and the coating.

A well-formed sail cloth of the present invention is characterized by high tear strength, that is, it is generally preferably 1.0 kg or more, more preferably 1.0 kg or more in both the vertical and horizontal directions when measured by the single tongue method. 1.5kg
It has a tear strength of more than

Furthermore, the well-formed sail cloth of the present invention preferably has an air permeability of 0.3 cc/cri/sec or less, preferably 0 to 0.3 cc/cri/sec, as measured by the Frazier method. It has the characteristic of having non-air permeability of ice/cnf/sec.

This non-breathability is achieved by the coating made of resin constituting the filament yarn (A), but in the sail cloth of the present invention, from the viewpoint of such non-breathability, the coating thickness is as follows:
Preferably it is 10μ or more.

Additionally, a well-formed sail cloth of the present invention preferably has a very low elongation in the bias direction of less than 2% when measured under a load of 20 pounds of tensile force per 2.5 cm of elongation width. It has the following characteristics.

Furthermore, the most well-formed sail cloth of the present invention was tested using a Scotto-type kneading tester (manufactured by Taisei Seiki Kagaku Co., Ltd.) under the conditions of an amplitude width of ±1.0□□□ and a suppression of 2 kg/d.
Even after being kneaded 0 times, the elongation in the bias direction is still maintained at 2% or less, which is an extremely desirable property for sail cloth.

This elongation property is achieved by the synergistic effect of the weave of the sailcloth and the aforementioned coating.

The sail cloth of the present invention may be further laminated or composited with other appropriate sheet materials.

Additionally, in general, sail cloth is exposed to water spray when sailing or is immersed in water when a yacht capsizes, so water tends to seep into the woven threads of the sail cloth due to capillary action. extremely heavy,
This may interfere with sailing or make storage difficult. However, since the sail cloth of the present invention has a resin coating on at least one side, this coating has a function of blocking water to a high level. In particular, cloth coated on both sides has a near-perfect high-level water-blocking function, and has the characteristic of being lightweight and easy to handle even when immersed in water, and retaining its properties with good durability.

This water-shielding performance is maintained at such an excellent level that there is no need to add water repellency to the surface where the fibers remain, since the cloth is coated on one side.

However, the sail cloth of the present invention may of course be subjected to water repellent treatment, and water repellents used for such water repellent treatment include ordinary wax, fluorine-based water repellents, and silicone-based water repellents. Although water repellents can be used, reactive water repellents such as perfluoroalkyl acrylate water repellents are particularly preferred because of their good durability.

[Example] Next, the present invention will be further explained by examples.

In addition, the physical property values in Examples were measured by the following method.

(1) Intrinsic viscosity (IV) 0.1 g of sample was dissolved in 10 ml of orthochlorophenol and measured at 25°C.

(2) Strength and elongation (raw yarn) Tensilon tensile tester (tJTM manufactured by Oryuntech Co., Ltd.
-1[), the strength and elongation was determined by measuring at a sample length of 200+n+++ and a tensile speed of 100 mm/min.

(3) Full-water shrinkage rate (ΔSw) The sample is made into a 10-turn skein shape using a measuring machine, and the skein is 0.
．． The original length L1 is measured by applying an initial load of 1 g/d. Next, it was placed in a full water bath at 100°C under no load, treated for 15 minutes, air-dried for 24 hours, and then a load of 0.1 g/d was applied again to measure the length L2 after treatment. Find the Sumoto shrinkage rate (63w) using the formula.

63w(%)=(L+L2)/LIX100(4)
Using a melting point microscope (manufactured by Yanagimoto Seisakusho), set several sample fibers on top of each other in a criss-cross pattern on a hot plate.
The melting point was defined as the temperature at which the crossed boundaries completely disappeared due to melting.

Next, filaments used in Examples were manufactured in the following manner.

[Manufacture of polyester filament yarn (B)] Using two types of polyethylene terephthalate (PET) with intrinsic viscosity (IV) of 0.66 and 0.72, melt spinning was performed according to a conventional method, and the magnification and heat setting conditions were adjusted as appropriate. 75 denier 2
Three types of drawn yarns with four filaments having different physical properties were obtained.

Table 1 shows the physical properties of these drawn yarns.

Table 1 [Manufacture of filament yarn (A)] Three types of isophthalic acid copolymerized PET with an intrinsic viscosity (IV) of 0.66, with the copolymerization rate of isophthalic acid changed as shown in Table 2.
These polymers were prepared, melt-spun by a conventional method, and drawn to obtain three types of drawn yarns of 100 denier and 24 filaments.

Table 2 shows the physical properties of these drawn yarns.

Table 2 Example 1, Comparative Example 1 Table 1. A polyethylene terephthalate drawn yarn of Na3 (melting point: 254°C) and a drawn isophthalic acid copolymerized PET yarn of Table 2 (Na5) (melting point: 230°C) were combined to produce a mixed fiber yarn of 175 denier and 48 filaments.

The mixed fiber ratio (A/B) of filament yarn (A) and polyester filament yarn (B) of this mixed fiber yarn was 57/43.

Polyester filament yarn (B
The strength of the filament (A
) was long.

A plain woven fabric with a warp yarn density of 90 yarns/inch and a weft yarn density of 80 yarns/inch was woven using such mixed fiber yarns as warp yarns and weft yarns. After scouring and drying this fabric in the usual manner, it was heat-treated in a heat calender (one side roll: water-cooled roll) at a calender temperature of 235°C and a nip pressure of 20 kg/car to obtain a fabric with a resin coating on one side. Ta.

On the other hand, as Comparative Example 1, two polyethylene terephthalate drawn yarns of Table 1, N (13) were combined, 150 denier 4
A mixed fiber yarn of 8 filaments was produced.

Using this blended yarn as the warp yarn and the weft yarn, a plain woven fabric with a warp yarn density of 104 yarns/inch and a weft yarn density of 95 yarns/inch was woven.

After scouring and drying this fabric in the usual way, it was heat-treated in a heat calender (one side roll: water-cooled roll) at a calender temperature of 257°C and a nip pressure of 20kg/c/ to create a sail cloth with a resin coating on one side. I got it.

The results of evaluating these sailcloths are shown in Table 3.

Table 3 Note that the air permeability was 0 (cc/cnf/sec) in all cases. The units in the table are as follows. That is, the melting point difference is 2°C, the elongation is %, and the tear strength is 2 kg.

As is clear from Table 3, the sail cloth made of the mixed yarn fabric made of filament yarns with no difference in thermal melting temperature of Comparative Example 1 has significantly lower tear strength than that of Example 1. This was judged to be due to a structural cause in that the skeletal structure and the coating structure of the textile tissue were not well differentiated and formed.

Examples 2 to 3 In this example, the effect of the melting point difference between the filament yarn (A) and the polyester filament yarn (B) was confirmed.

Table 1, Nα3 drawn PET yarn (melting point: 254°C) was mixed with Table 2, Nα4 (melting point = 240°C) or Table 2, Nα6 (melting point: 215°C), isophthalic acid copolymerized PET drawn yarn. , mixed fiber yarns (former combination: Example 2, latter combination: Example 3) having the physical property values shown in Table 4 were obtained.

These mixed fiber yarns were used as warp yarns and weft yarns to weave plain woven fabrics having a warp yarn density of 90 yarns/inch and a weft yarn density of 80 yarns/inch.

After scouring and drying these fabrics in a conventional manner, they were calendered at a calender temperature of 248°C for Example 2 and 223°C for Example 3, using a thermal calender with a nip pressure of 20 kg/crl (one side roll: using a water-cooled roll). ) to obtain a sail cloth with one side covered with a resin coating.

The results of evaluating these sailcloths are shown in Table 5. Note that the evaluation results of the sail cloth of Example 1 are also listed for reference.

As is clear from Table 5, compared to Examples 1 and 3, which had a melting point difference of 20° C. or more, Example 2, which had a smaller melting point difference, had a tendency to show a lower tear strength.

Examples 4 to 5 In this example, the effect of single yarn strength of polyester filament yarn (B) is confirmed.

Table 1, Nα1 as polyester filament yarn (B)
(Single yarn strength: 5.1 g/d) or Nα2 (Single yarn strength: 6.7 g/d) PET drawn yarn was used as the filament yarn (A) in Table 2, Nα5 isophthalic acid copolymerized PET. The drawn yarns were combined to obtain two types of mixed fiber yarns each having 175 denier and 48 filaments (the former combination: Example 4, the latter combination: Example 5).

Table 6 shows the physical properties of these mixed yarns. In addition, Example 1
The blended yarns are also listed for reference.

Using these mixed yarns, weaving and heat calendering were carried out in the same manner as in Example 1 to obtain a sail cloth having a resin coating on one side.

The results of evaluating these sailcloths are shown in Table 7.

As is clear from Table 7, Example 5, which uses a material with higher single yarn strength than Example 4, is a sail cloth with superior tearing strength, and this indicates that the single yarn strength of polyester filament (B) It was confirmed that the larger the value, the greater the tearing strength of the sail cloth.

Examples 6 to 8 In this example, the effect of yarn length difference after diving treatment was confirmed.

As the filament (A), an undrawn yarn of inophthalic acid copolymerized PET with Nα5 in Table 2 was used, and the yarn was stretched while changing the heat setting temperature and relaxation rate during stretching to obtain the boiling yield shown in Table 8. Different drawn yarns of 100 denier 24 filaments were obtained.

These drawn yarns and the PET drawn yarn of Nα3 in Table 1 were mixed as a polyester filament yarn (B) to obtain three types of mixed yarns each having a 175 denier and 48 filament.

Table 8 shows the physical properties of these mixed yarns. In addition, Example 1
The blended yarns are also listed for reference.

Using these mixed fiber yarns, weaving was carried out in the same manner as in Example 1, and heat calendering was performed to obtain a sail cloth having a resin coating on one side.

The results of evaluating these sailcloths are shown in Table 9.

As can be seen from Table 9, Example 6, Example 7, Example 1,
It was confirmed that in the order of Example 8, that is, the larger the difference in yarn length, the better the flatness of the resin coating provided the sail cloth. Furthermore, it was confirmed that the greater the difference in yarn length, the greater the tear strength of the sail cloth.

Examples 9-12 In this example, the effect of the fiber blend ratio was confirmed.

As the polyester filament yarn (B), PE having the physical properties of Table 1 and Nα3, which differ only in total fineness as shown in Table 10.
A T-drawn yarn is produced, and the filament yarn (A) is also produced by isophthalic acid copolymerization having the physical properties of Table 2 and Nα5, which differ only in total fineness as shown in Table 10.
Four types of mixed fiber yarns were obtained using the combinations shown in Table 10.

Using these mixed fiber yarns, plain weave fabrics were woven at the densities shown in Table 11, and heat calendered in the same manner as in Example 1 to obtain sail cloth with a resin coating on one side. .

The evaluation results of these sail cloths are as shown in Table 11.

As is clear from Table 11, as the ratio of filament yarn (A) decreases, a sufficient coating is not formed and the sail cloth tends to have high elongation and air permeability. It was confirmed that the lower the ratio of B), the lower the tear strength of the sail cloth.

Examples 13 to 14 Using the gray fabric of Example 3, it was scoured and dried in a conventional manner, then heat treated at 235°C with a hot air heated pin tenter, and then calendered on both sides at 150°C with a nip pressure of 20 kg/car. A sailcloth having coatings on both sides was obtained (Example 13).

Next, using the gray fabric of Example 1, after scouring and drying in the usual manner, heat treatment was performed at 240°C using a hot air heated pin tenter, and then both sides were heated at 150°C with a nip pressure of 20 kg/cI.
A sailcloth having coatings on both sides was obtained by calendering with Ir (Example 14).

The evaluation results of these sail cloths are shown in Table 12.

Table 12 Note that the air permeability was good at O (cc/al/sec) in all cases.

Furthermore, when these cloths were soaked in water for 1 hour, the water content was less than 2% of the weight of the cloth.

As is clear from Table 12, the cloth of Example 13 had a well-balanced tearing strength both vertically and horizontally, but the cloth of Example 14 had a small tearing strength.

Comparative Examples 3 to 4 Two types of cloth were obtained in which a polyester biaxially stretched film with a thickness of 50 μm was laminated on both sides or one side of the raw fabric of Example 1 via a polyurethane adhesive (the former: Comparative Example 3). ,
The latter: Comparative Example 4).

These cloths, together with those obtained in Example 1, were subjected to the following rubbing resistance test.

First, the test piece was immersed in boiling water for 2 hours, then immersed in room temperature water for 1 hour, and while still wet, was tested using a Scotto-type kneading tester (manufactured by Taisei Seiki Kagaku Co., Ltd.) to determine the amplitude width ±1.0 cm. ,
It was rubbed 100 times under the condition of 2 kg/c/pressure.

As a result, no change occurred in the cloth of Example 1, but peeling occurred from the bent portions of both the single-sided film-laminated product and the double-sided film-laminated product.
It showed poor durability.

The test piece after the test was subjected to a tear test.

Separately, a test piece was collected and immersed in water for 1 hour, and then the weight increase rate of the test piece was evaluated. These results are shown in Table 1
As described in 3.

Table 13 Note that the air permeability in all cases was 0 (cc/cri/sec), which was good.

As is clear from Table 13, compared to that of Example 1,
It was confirmed that all conventional film laminate products had low tear strength, and moreover, the weight increase when immersed in water was extremely large.

Comparative Example 5 Nylon 6.6 filament yarn (15
0 denier 48 filament: The filament (B) is a single yarn with a fineness of 3°12d) and is made of nylon 6 with a melting point of 180°C.
A filament yarn (75 denier 48 filament: single yarn fineness 1.56 d) was used as the filament (A), and these were mixed at a blend weight ratio (B/A) of 67/33 to obtain a mixed fiber yarn.

Next, this mixed fiber yarn was used as the warp yarn and the weft yarn to weave a plain woven fabric with a warp yarn density of 68 yarns/inch and a weft yarn density of 63 yarns/inch.

After scouring and drying this fabric in a conventional manner, it was heated in a heat calender at a calender temperature of 200°C and a nip pressure of 12 kg/cm (
A sail cloth with a basis weight of 130 g/ryr was produced by heat treatment using a roll on one side (using a water-cooled roll).

As shown in Table 14, the evaluation of the physical properties of this sheet confirmed that there was almost no difference from that of Example 1.

However, when these sail cloths were immersed in water for a day and night, the cloth of Comparative Example 5 was wrinkled all over, had large dimensional changes, and changed shape, and could not be used as a practical sail cloth.

Table 14 The air permeability was O (cc/crd/sec) in all cases.

[Effects of the Invention] The present invention provides an excellent sail cloth that is lightweight, has excellent bending resistance and rubbing resistance, has high tear strength, and has very low elongation.

In particular, the sail cloth of the present invention has the excellent feature that there is no increase in I-Et due to water content due to capillary action, which is the biggest drawback of conventional film-laminated sail cloth, and this property is maintained for a long time. Therefore, it has the excellent feature of retaining its lightness even if it is submerged in water or splashed with water.

The sail cloth of the present invention having such characteristics is semi-permanently light, highly maneuverable, and has excellent smoothness, so it has excellent wind catching properties and can achieve very good sailing performance. It not only gives you a sharp sailing sensation, but also allows you to fully enjoy the sensation of sports and competition.

Claims (9)

[Claims] (1) A resin coating is applied to at least one side of a fabric made by using a blended yarn consisting of at least two or more filament yarns having a difference in heat melting temperature, at least one of which is a polyester filament yarn, as at least one of the warp and weft yarns. and among the filament yarns constituting the mixed fiber yarn, the single filament fineness of the filament yarns made of polyester is at least 1 denier, and the resin of the filament yarns melts at a lower temperature than that of the polyester filament yarns. A sail cloth characterized in that it is made of a sheet in which the resin coating is formed by: (2) A resin coating is applied to at least one side of a woven fabric in which at least one of the warp and weft yarns is a blended yarn consisting of at least two or more types of filament yarns having different thermal melting temperatures, at least one of which is a polyester filament yarn. The resin coating is a sail cloth made of a sheet made of filament yarn resin that melts at a lower temperature than the polyester filament yarn, and the tear strength of the sheet in the vertical and horizontal directions is Both are 1.0 kg or more, tensile force per 2.5 cm of elongation width is 20
A sail cloth characterized by an elongation in the bias direction under a pound load of 2% or less. (3) The sail cloth according to claim (1) or (2), wherein the resin coating is formed substantially only on one side of the sheet. (4) The sail cloth according to claim (1) or (2), wherein a resin coating is formed on substantially both sides of the sheet. (5) The sail cloth according to claim 1 or 2, wherein the mixed yarn is a combination of multiple types of polyester filament yarns having different thermal melting temperatures. (6) The sail cloth according to claim 1 or 2, wherein the sheet has a basis weight of 300 g/m^2 or less. (7) The sail cloth according to claim (1) or (2), wherein the sheet has an air permeability of 0.3 cc/cm^2/sec or less. (8) Claim (1) or (2) wherein the polyester filament yarn has a single yarn strength of 6 g/d or more.
Sale cloth listed. (9) Claim (1) or (2) wherein the woven fabric has a plain weave structure.
) Sale cloth listed.