JPH0422629A - Laminate for sail - Google Patents

Abstract

PURPOSE:To provide a laminate for a sail low in elongation, hard to absorb water and easy to dry by laminating a biaxially stretched polyester film to the single surface of a fabric composed of polyester filament yarn through a layer of a polyester adhesive copolymerized with alicyclic polylactone. CONSTITUTION:A fabric and a biaxially stretched polyester film are laminated using a specific adhesive composed of a polyester adhesive copolymerized with alicyclic polylactone. At the polyestel filament yarn constituting the fabric, one with a denier of 30-500D and single yarn fineness of 1-30d is generally pref. used. The biaxially stretched polyester film for a sail has pref. thickness of 10-100mu in general and, when the thickness is below 10mu, low elongation especially in a bias direction become hard to sufficiently secure and, when the thickness exceeds 100mu, the flexibility and lightweight properties of a laminate for a sail are easily damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a sail laminate that is difficult to absorb water and dries easily, and is most suitable as a fabric for yacht sails and surfing sails.

[Prior Art] Conventionally, a laminate in which a fabric using polyester filament yarn and a film are bonded together with a polyurethane adhesive has been used for sail cloths for yachting, windsurfing, etc., as disclosed in, for example, Japanese Patent Laid-Open No. 60-219055. , Utility Model Application Publication No. 187436/1983, Japanese Patent Application Publication No. 1987-187-
This is known from, for example, Japanese Patent No. 66646.

[Problems to be Solved by the Invention] However, the sail laminate using the above-mentioned polyurethane adhesive has a fatal drawback of high water absorption and poor quick drying properties. However, as a matter of course, there is a problem with the operability during sailing.

In view of the drawbacks of such conventional sail laminates, the present invention
It is an object of the present invention to provide an excellent laminate for a sail that has low elongation, is difficult to absorb water, and is easy to dry even when wet.

The sail cloth made of the sail laminate of the present invention exhibits the excellent feature of being light and easy to handle, allowing the sail to be operated even if it gets wet.

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

That is, the sail laminate of the present invention is made by laminating a biaxially stretched polyester film on at least one side of a fabric using polyester filament yarn via a polyester adhesive made by copolymerizing an alicyclic polylactone. It is characterized by this.

[Function] The present invention provides a sail cloth made of a polyester filament yarn fabric and a polyester biaxially stretched film, and when these are laminated with a specific adhesive, the properties against water of the laminate are significantly improved. It was completed by investigating.

That is, in the present invention, by laminating the above-mentioned fabric and film using a specific adhesive called a polyester adhesive made by copolymerizing alicyclic polylactone, the fabric is resistant to water absorption and easily dries even if it gets wet. A sail laminate having unexpected properties could be provided.

Polyester filament yarns used in the fabric constituting the sail laminate of 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. It is possible to use a polyester obtained by copolymerizing an acid or an aliphatic dicarboxylic acid such as adipic acid, or a polyester obtained by copolymerizing a part of an alcohol component with polyalkylene glycol.

Further, such polyester may contain additives that are normally added such as antioxidants, heat-resistant agents, ultraviolet inhibitors, and pigments.

The fineness of the polyester filament yarn constituting the above-mentioned woven fabric varies depending on whether the polyester biaxially stretched film is laminated on one side or both sides of the woven fabric, and also depends on the type of yachting or windsurfing,
Although it varies depending on the site of use, it is generally preferably from 30 to 500 D, and the single yarn fineness is preferably from 1 to 30 D.

As the woven fabric, a plain weave, a plain weave with lips in the warp and/or weft direction, a scrim, etc. can be preferably used, but the present invention is not limited to these woven textures.

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

Such films may contain additives such as antioxidants, heat-resistant agents, ultraviolet absorbers, and pigments.

Such polyester biaxially stretched film may have any thickness, but for sailing purposes, it is generally 10 to 1
00μ is preferably used. If the thickness is less than 10μ, it tends to be difficult to ensure sufficient low elongation properties of the sail laminate, especially low elongation properties in the bias direction; if the thickness exceeds 100μ, the sail laminate tends to be The flexibility and lightness of the body tend to be impaired.

Next, a polyester adhesive formed by copolymerizing an alicyclic polylactone for bonding the above-mentioned polyester filament fabric and a polyester biaxially stretched film will be described.

The polyester adhesive of the present invention contains dicarboxylic acids such as terephthalic acid, adipic acid, sepatic acid, and isophthalic acid as an acid component, and contains ethylene glycol, neopentine glycol, 1-4-butanediol, 1-5-bentanediol,・The main component is polyester whose alcohol component is a diol or polyol such as 6-hexanediol.

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

As such alicyclic polylactone, for example, a polymer consisting of ε-caprolactone, γ-caprolactone, δ-caprolactone, propiolactone, butyrolactone, δ-valerolactone, etc. can be used. Such polylactone preferably has a molecular weight of 500 to
As many as 4000 cycloaliphatic polylactones are used to achieve the objectives of the present invention.

Such a cycloaliphatic polylactone generally contains, in the copolymer resin,
Preferably 10 to 50% by weight, more preferably 15 to 50% by weight
Copolymerization in a range of 25% by weight is preferred.

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

For example, the aforementioned copolymer of alicyclic polylactone and polyester has the unique effect of improving water absorption prevention and quick drying properties, but this copolymer also has adhesive properties. Has excellent properties.

However, the adhesive strength also depends on the coating strength of the copolymer resin, and in order to improve the adhesive strength, it is preferable to slightly crosslink the copolymer.

As such a crosslinking agent, for example, isophorone diisocyanate, hexamethylene diisocyanate, tolylene diisocyanate, adducts of hexamethylene diisocyanate and hexanetriol, etc. can be used.

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

In the present invention, by using such a crosslinking agent, the molecular weight of the copolymer can be adjusted to preferably 15,000 to 40 in terms of average molecular weight.
Cross-linking is carried out so that it becomes about 000. In order to induce such crosslinking, the crosslinking agent is preferably added in a small amount of 5% by weight or less, and within a range that does not impair the effects of the present invention described above.

Among the adhesives thus produced, those having a 100% tensile modulus in the range of 5 to 50 kg/car or a softening point in the range of 150 to 200°C, preferably both. A material having these properties can provide a sail laminate with superior adhesive strength, and thus can preferably achieve the effects of the present invention.

In other words, if the 100% tensile modulus is less than 5 kg/ad or the softening point is less than 150°C, the copolymer resin itself is soft, the coating strength is generally low, and the film and fabric are not integrated. On the other hand, if the 100% tensile modulus exceeds 50 kg/car or the softening point exceeds 200°C, the resin is extremely hard, tends to have poor adhesion, and has significantly low tear strength. It shows a tendency to

The coating amount of such adhesive is preferably 10 to Bog/rl. If the amount of adhesive applied is less than 10g#,
There is a tendency for it to become difficult to obtain sufficient peeling strength. on the other hand,
If it exceeds 80g1rd, not only will the flexibility and lightness of the sail laminate be impaired, but the above-mentioned properties of the present invention will tend to deteriorate.

To apply the adhesive, dilute it with a solvent such as toluene, xylene, or MEK and adjust it to an appropriate viscosity on one side of the polyester biaxially stretched film, then apply it uniformly using a comma coater or knife coater, and then volatilize the dissolved adhesive. This is achieved by laminating a fabric using polyester filament yarn on the film and subjecting it to heat and pressure treatment using a pair of upper and lower heated rollers.

The temperature of such heat-pressure treatment varies depending on the softening point of the adhesive, but in general, temperature conditions in the range of 70 to 200'C are preferred, and the applied linear pressure is 1 to 7 kg/C [
Conditions of approximately n and a processing speed of approximately 10 to 20 m/min are preferably used.

[Example code] 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) Tear strength Measured by JIS L1096 A method (single tongue method).

■ Peeling strength In accordance with JIS L1089 method, initial and flood treatment 2
After a period of time, using a Scotto type kneading tester (manufactured by Mahayana Kagaku Seiki), 1.
The peel strength after rubbing 00 times was measured.

(3) Water absorption speed width 2. A longitudinally long strip-shaped sample of 5 cm was prepared and measured by the bisic method.

(4) Prepare a sample of 10 cm in length and width for water absorption rate, 20℃, 65%
After being left in an RH atmosphere for a day and night, the weight (D) is measured.

After that, the sample was immersed in water for 10 minutes, the water droplets on the surface of the sample were gently wiped off with filter paper, and the weight (W) was measured.
The water absorption rate was determined using the following formula.

Water absorption rate (%) = (WD) /DX 100 In the formula,
W: Weight after soaking in water (Weight after standing all day and night) (5) Drying time Using the sample after measuring the above-mentioned water absorption rate, dry it at room temperature 3.
The sample was left in an atmosphere at 0° C., and the time required for the weight to return to the same weight after being left for a day and night at the time of water absorption measurement was measured.

Example 1.2, Comparative Example 1.2 A polyethylene terephthalate filament yarn with a 250 denier 48 filament and a strength of 7.2 g/d was used as the warp.
Polyethylene terephthalate filament yarn with 24 filaments of 125 denier and a strength of 7.2 g/d is used for each weft, warp density is 50 threads/m2 inch, and weft density is 60.
A plain weave of 1/m2 inch was woven.

This fabric was scoured, intermediate set, colored and then set in a conventional manner.

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

The obtained polymer had a softening point of 175°C and a 100% tensile modulus of 19 kg/co? It was a polyester adhesive with an average molecular weight of 25,000.

In addition, as Example 2, the above-mentioned polyester adhesive had a 100% tensile modulus of 7. 3 kg/ad was used.

Apply these adhesives to a coating amount of 40 using a comma coater.
It was coated on one side of the above film in a layer of g/rd and dried at 80°C.

The plain woven fabric after setting was bonded to the adhesive-coated surface of these adhesive-coated films, and the surface temperature was 150°C and the linear pressure was 3 kg.
/at and a processing speed of 13 m/min to obtain a sail laminate by passing through a pair of upper and lower heated rollers.

On the other hand, as Comparative Example 1, the acid component was isophthalic acid, the diol component was 1.6 hexanediol, and the average molecular weight was 10.
000, softening point is 173℃, 100% tensile modulus is 4
A sail laminate was obtained under the same conditions as in Example 1 using a polyester adhesive in which no alicyclic polylactone was copolymerized.

In addition, as Comparative Example 2, 1.6 hexanediol adipate with an average molecular weight of 30,000 had a softening point of 145
A sail laminate was obtained under the same conditions as in Example 1 using a polyurethane adhesive having a 100% tensile modulus of 15 kg/cur at .

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

As is clear from Table 1, the laminate of Comparative Example 1 using a polyester adhesive in which no alicyclic polylactone was copolymerized had lower peel strength than that of Example 1.2. In particular, the peeling strength after flooding treatment and massaging treatment was significantly poor, and there were problems with durability.

Comparative Example 2, which used a polyurethane adhesive, showed significantly larger values in water absorption rate, water absorption rate, and drying time than those in Example 1.2, and was significantly inferior in these properties. It was something.

The peaches of Examples 1 and 2 showed outstandingly superior results in all properties, including peel strength, water absorption rate, water absorption rate, and drying time, compared to the comparative example.

Examples 3 to 5 Using the polyester adhesive and plain fabric used in Example 1, the adhesive was applied in an amount of 35g1rd to two types of colorless and transparent polyethylene terephthalate biaxially stretched films with thicknesses of 50μ and 125μ. 100g1rd, 2nd
Laminated bodies for sails were produced under the same conditions as in Example 1, with the changes shown in the table.

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

As is clear from Table 2, the amount of adhesive applied is
rd or the film thickness exceeds 100μ, the laminate tends to have a large basis weight and a hard texture, but this has a negative effect on peel strength, water absorption rate, water absorption rate, and drying time. There was no.

[Effects of the Invention] The present invention can provide an excellent sail laminate that has low elongation, is difficult to absorb water, and is easy to dry even when wet.
According to the sail cloth made of such a sail laminate,
Even if it gets wet, it is light and easy to handle, and dries quickly, making it convenient for storage after the sale.

Claims (4)

[Claims] (1) A sail characterized in that a polyester biaxially stretched film is laminated on at least one side of a woven fabric using polyester filament yarn, with a polyester adhesive layer formed by copolymerizing alicyclic polylactone interposed therebetween. laminate for use. (2) The laminate for a sail according to claim (1), wherein the polyester adhesive has a softening point of 50 to 200°C. (3) Polyester adhesive is 5 to 50 kg/cm^
Claim (1) has a 100% tensile modulus of 2.
) Sailing laminate as described. (4) Polyester adhesive layer is 10 to 80 g/m^
2. The sail laminate according to claim 1, wherein the sail laminate is laminated with a coating amount in a range of 2.