JPH0628949B2 - Laminate for sale - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sail laminate which is most suitable as a fabric for a sailboat or a surfing sail that is difficult to absorb water and easily dry.

[Prior Art] Conventionally, for a sailcloth such as a yacht or windsurfing, it is known to use a laminate in which a polyester fiment yarn-using woven fabric and a film are adhered with a polyurethane-based adhesive, for example, JP-A-60-219055. Japanese Laid-Open Patent Publication No. 59-187436, Japanese Laid-Open Patent Publication No. 61-6.
It is known from Japanese Patent No. 6646.

[Problems to be Solved by the Invention] However, the sail laminate using the polyurethane adhesive has a fatal drawback that it has large water absorption and poor quick-drying property. Then, of course, there is a problem in the operability when sailing.

The present invention, in view of the drawbacks of such a conventional sail laminate,
It is intended to provide an excellent sail laminate which has a low elongation, is hard to absorb water, and is easily dried even when wet.

According to the sail cloth comprising the laminated body for sail of the present invention, it is possible to exhibit the excellent feature that the sail can be operated lightly and with good handleability even when it is wet with water.

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

That is, the sail laminate of the present invention is formed by laminating a polyester biaxially stretched film on at least one surface of a polyester filament yarn woven fabric via a polyester adhesive obtained by copolymerizing an alicyclic polylactone. It is characterized by that.

[Operation] In the present invention, in a sail cloth composed of a woven fabric using polyester filament yarn and a polyester-based biaxially stretched film, when these are laminated with a specific adhesive, the property of the laminated body against water is significantly improved. It was completed by investigating.

That is, according to the present invention, by laminating the above-mentioned woven fabric and a film using a specific adhesive called a polyester-based adhesive obtained by copolymerizing an alicyclic polylactone, it is difficult to absorb water and easily dry even when wet. That is, it is possible to provide a laminated body for sail having the unexpected property.

Examples of the polyester filament yarn used in the woven fabric constituting the sail laminate according to the present invention include, for example, polyethylene terephthalate, polybutylene terephthalate, and acid components constituting the repeating units of these polyesters such as isophthalic acid and 5-sodium sulfoisophthalate. An acid or an aliphatic dicarboxylic acid such as adipic acid may be copolymerized, or a polyester in which polyalkylene glycol is partially copolymerized with an alcohol component may be used.

Further, the polyester may contain additives such as antioxidants, heat-resistant agents, UV inhibitors and pigments which are usually added.

The fineness of the polyester filament yarn constituting the above-mentioned woven fabric is different depending on whether the polyester biaxially stretched film is laminated on one side of this woven fabric or laminated on both sides, and further, the type of yacht or windsurfing,
Although it varies depending on the site to be used, generally, a range of 30 to 500 D, and a range of single yarn fineness of 1 to 30 d are generally used.

As the woven fabric, a plain weave and a fabric having a lip in the warp and / or weft directions of the flat weave, and a scrim can be preferably used, but the weave is not limited to these weaves.

The polyester biaxially stretched film used in the present invention may be a biaxially stretched film made of a polyester resin, but a polyester film mainly containing polyester terephthalate is mainly used.

Such a film may be added with an antioxidant, a heat-resistant agent, an ultraviolet absorber, a pigment or the like.

The polyester-based biaxially stretched film may have any thickness, but for sails, it is generally 10 to 1
Those of 00μ are preferably used. If the thickness is less than 10 μ, it tends to be difficult to sufficiently secure the low elongation of the sail laminate, particularly the low elongation in the bias direction, and if the thickness exceeds 100 μ, the sail laminate is less likely to be secured. The flexibility and lightness of the body tend to be damaged.

Next, a polyester adhesive obtained by copolymerizing the alicyclic polylactone for adhering the above polyester filament woven fabric and the polyester biaxially stretched film will be described.

The polyester adhesive of the present invention comprises a dicarboxylic acid such as terephthalic acid, adipic acid, sebacic acid, and isophthalic acid as an acid component, and uses ethylene glycol, neopentine glycol, 1.4 butanediol, 1.5 pentanediol, 1. The main component is a polyester having a diol such as 6-hexanediol or a polyol as an alcohol component.

A copolyester obtained by copolymerizing such a polyester with an alicyclic polylactone exhibits an important action in achieving the object of the present invention.

As the alicyclic polylactone, for example, a polymer composed of ε-caprolactone, γ-caprolactone, δ-caprolactone, propiolactone, butyrolactone, δ-valerolactone and the like can be used. The polylactone preferably has a molecular weight of 500 to
Approximately 4000 alicyclic polylactones are used to achieve the purpose of the present invention.

Such an alicyclic polylactone is generally used in the copolymer resin.
Preferably 10 to 50% by weight, more preferably 15 to
Copolymerized in the range of 25% by weight is preferable.

The performance of the polyester-based adhesive of the present invention is determined not only by the copolymerization ratio of the polylactone, but also by the type of the polylactone, the polyester composition, and the degree of crosslinking with isocyanate described below.

For example, the peculiar action of improving the water absorption preventing property and the quick-drying property is exhibited by the above-mentioned copolymer of alicyclic polylactone and polyester, and this copolymer has an improved adhesive property. Also has excellent properties.

However, the adhesive strength is also influenced by the film strength of the copolymer resin, and in order to improve the adhesive strength, it is preferable to slightly crosslink the copolymer.

As such a cross-linking agent, for example, isophorone diisocyanate, hexamethylene diisocyanate, tolylene diisocyanate, an adduct of hexamethylene diisocyanate hexanetriol, or the like can be used.

However, since such a cross-linking agent has a property of increasing hydrophilicity, it is necessary to use the cross-linking agent within a range that does not impair the effects of the present invention.

In the present invention, the molecular weight of the copolymer is preferably 15,000 to 40 in terms of average molecular weight by the crosslinking agent.
Crosslink to about 000. In order to induce such cross-linking, it is preferable to add the cross-linking agent in a small amount range of 5% by weight or less, and within a range that does not impair the effects of the present invention.

Among the adhesives thus produced, those having 100% tensile modulus in the range of 5 to 50 kg / cm ² or softening point in the range of 150 to 200 ° C., preferably these Since those having both properties can provide a sail laminate excellent in adhesive strength, the effects of the present invention can be preferably achieved.

That is, when the 100% tensile elastic modulus is less than 5 kg / cm ² or the softening point is less than 150 ° C., the copolymer resin itself is soft and generally the coating strength is low, and the film and the woven fabric are integrated. On the other hand, 100% tensile modulus exceeds 50 kg / cm ² or softening point is 200
When the temperature is higher than 0 ° C, the resin tends to be extremely hard, the adhesiveness of the resin tends to be poor, and the tear strength tends to be remarkably small.

The amount of the adhesive applied is preferably 10 to 80 g / m ² . If the amount of adhesive applied is less than 10 g / m ² ,
It tends to be difficult to obtain sufficient peel strength. on the other hand,
If it exceeds 80 g / m ² , the flexibility of the sail laminate,
Not only the lightness is impaired, but the characteristics of the present invention tend to be deteriorated.

The adhesive is applied to one side of a polyester biaxially stretched film by diluting it with a solvent such as toluene, xylene or MEK and adjusting it to an appropriate viscosity, and then uniformly applying it with a comma coater, knife coater, etc. This is achieved by laminating a polyester filament yarn woven fabric on the film and subjecting the film to a hot pressing process such as a pair of upper and lower heat rollers.

The temperature of the hot press treatment varies depending on the softening point of the adhesive, but in general, temperature conditions in the range of 70 to 200 ° C. are preferable, the applied linear pressure is about 1 to 7 kg / cm, and the treatment speed is 10 Conditions of about 20 m / min are preferably used.

EXAMPLES Next, the present invention will be further described with reference to examples.

In addition, the physical-property value in an Example was measured by the following method.

(1) Tear strength Measured by JIS L1096 A-construction method (single tongue method).

(2) Peeling strength In accordance with JIS L1089 method, using a Scott type kneading tester (manufactured by Daiei Kagaku Seiki) at the initial stage and after 2 hours of boiling water treatment, with an amplitude width of ± 1.0 cm and a pressure of 2 kg / cm ² 100
The peel strength after rubbing was measured.

(3) Water absorption rate A strip-shaped sample having a width of 2.5 cm and long in the vertical direction was prepared and measured by the Bayrec method.

(4) Water absorption rate Prepare vertical and horizontal 10 cm samples, 20 ° C, 65% R
After standing in the atmosphere of H for 24 hours, the weight (D) is measured.

Then, the sample was immersed in water for 10 minutes, water drops on the surface of the sample were wiped off lightly with a filter paper to measure the weight (W), and the water absorption rate was calculated by the following formula.

Water absorption rate (%) = (WD) / D × 100 In the formula, W: weight after immersion in water D: weight after standing overnight (5) Drying time Using the sample after measuring the above water absorption rate, Room temperature 3
The sample was allowed to stand in an atmosphere of 0 ° C., and the time taken to return to the weight after standing for one day at the time of water absorption measurement was measured.

Examples 1 and 2 and Comparative Examples 1 and 2 250 denier 48 filaments, polyethylene terephthalate filament yarn having a strength of 7.2 g / d is used as a warp,
A plain woven fabric having a warp density of 50 yarns / inch and a weft yarn density of 60 yarns / inch was woven by using polyethylene terephthalate filament yarns of 125 denier 24 filaments and a strength of 7.2 g / d as the weft yarns.

This woven fabric was scouring, intermediately set and colored and set in the usual way.

On the other hand, a biaxially stretched film made of colorless and transparent polyethylene terephthalate having a thickness of 50 μ and an alicyclic polylactone made of ε-caprolactone having an average molecular weight of 2000,
A small amount of a polyester having an acid component of isophthalic acid and a diol component of 1.6 hexanediol, and an adduct of isophorone diisocyanate and hexamethylene diisocyanate hexanetriol were added and reacted.

The obtained polymer was a polyester adhesive having a softening point of 175 ° C. and a 100% tensile modulus of 19 kg / cm ² and an average molecular weight of 25,000.

As Example 2, the polyester adhesive having a 100% tensile elastic modulus of 7.3 kg / cm ² was used.

Apply a coating amount of these adhesives to 40
It was coated on one side of the above film so as to have a layer of g / m ² , and dried at 80 ° C.

The plain woven fabric after setting is joined to the adhesive coated surface of these adhesive coated films, the surface temperature is 150 ° C, and the linear pressure is 3 kg / cm.
^{2. Under} the conditions of a processing speed of 13 m / min, they were passed through a pair of upper and lower heat rollers to be integrated with each other to obtain a laminate for sail.

On the other hand, as Comparative Example 1, the acid component is isophthalic acid and the diol component is 1.6 hexanediol.
000, softening point is 173 ° C, 100% tensile modulus is 4
A laminate for sail was obtained under the same conditions as in Example 1 by using a polyester-based adhesive which was kg / cm ² and which was not copolymerized with alicyclic polylactone.

Further, as Comparative Example 2, a softening point of 145 having an average molecular weight of 30,000 composed of 1.6 hexanediol adipate and a softening point of 145
A polyurethane laminate having a 100% tensile modulus of 15 kg / cm ² at 0 ° C. was used to obtain a sail laminate under the same conditions as in Example 1.

The properties of the obtained laminate are shown in Table 1.

As is clear from Table 1, the laminate of Comparative Example 1 using the polyester adhesive in which the alicyclic polylactone is not copolymerized has lower peel strength than those of Examples 1 and 2. In particular, the peel strength after boiling water treatment + rubbing treatment was significantly inferior and there was a problem in durability.

The product of Comparative Example 2 using the polyurethane-based adhesive shows significantly larger values of water absorption rate, water absorption rate and drying time than those of Examples 1 and 2, and is significantly inferior to these properties. It was a thing.

The products of Examples 1 and 2 all showed excellent results in terms of peeling strength, water absorption rate, water absorption rate, and drying time as compared with Comparative Examples.

Examples 3 to 5 Using the polyester adhesive and the plain weave used in Example 1, two colorless and transparent polyethylene terephthalate biaxially stretched films having a thickness of 50 μm and 125 μm were coated with the adhesive at 35 g / as m ² and 100 g / m ^2, modified as in table 2, it was made sail laminate for the same conditions, respectively in example 1.

The properties of the obtained laminate are shown in Table 2.

As is clear from Table 2, the amount of adhesive applied is 80 g /
If it exceeds m ² or if the film thickness exceeds 100 μ, the weight of the laminate tends to be large and the texture tends to be hard, but the peel strength, water absorption rate, water absorption rate, and drying time are poor. There was no effect.

EFFECTS OF THE INVENTION The present invention can provide an excellent sail laminate that has low elongation, is hard to absorb water, and is easy to dry even when wet,
According to the sail cloth made of such a laminated body for sail,
Even if it gets wet, it is light and easy to handle, and can be dried quickly, which is convenient for storage after sale.

Claims (4)

[Claims] 1. A polyester-based adhesive 2 comprising a polyester-based adhesive layer formed by copolymerizing an alicyclic polylactone on at least one surface of a polyester filament yarn-containing woven fabric.
A laminated body for sails, comprising a laminate of axially stretched films. 2. The polyester adhesive is 50 to 200 ° C.
The laminated body for sails according to claim 1, which has a softening point of. 3. A polyester adhesive is 5 to 50 kg / cm.
The sail laminate according to claim 1, which has a 100% tensile modulus of ² . 4. A polyester adhesive layer comprising 10 to 80 g
The laminated body for sails according to claim 1, wherein the laminated body is laminated with an application amount in the range of / m ² .