JPH0513568Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Technical Field] This invention relates to a sail laminate used for sails for windsurf-ins, yachts, etc. [Background Art] Some recent sails for windsurfing use a laminated sail cloth with a polyester film pasted on one or both sides of the fabric. However, this conventional sale has the following drawbacks. When a sail is rolled up for transportation, storage, or storage, the sail becomes curly and looks bad. Because the sail has poor shape retention, the sail stretches and loses its shape when exposed to strong winds or when exposed to the weight of water when raised from the water. In this case, sufficient speed as designed cannot be obtained. Durability is also poor. Creases tend to form, and the polyester film and fabric may peel off from the creases.
It's easy to do. Sails are generally made by machine-sewing sail cloth, but if the sail is exposed to the wind during sailing and force is applied to the seams, there is a high risk that the sail cloth film will tear at the seams. If the mesh of the fabric becomes rough, it will be difficult to prevent the film from tearing. [Purpose of the invention] This invention was devised in view of the above circumstances, and was designed to be extremely resistant to curling and creases, to be resistant to tearing even when force is applied to the sewn parts, and to be able to see through the other side. The object of the present invention is to provide a laminate for sails that can also be used for sails. [Disclosure of the invention] In order to achieve the above object, this invention consists of a polyester biaxially stretched film A having a thickness of 15 to 100 μm, a soft vinyl chloride film B having a thickness of 40 to 450 μm, and a basis weight of 5 to 150 g/m. ² with a pore volume of 50~
Net C made of 95% synthetic fiber is A/C/B.
The gist is a laminate that is laminated in this order with an adhesive and has a total light transmittance of 20% or more. This idea will be explained in detail below. The polyester biaxially stretched film A in this invention refers to polyethylene terephthalate (hereinafter referred to as
It is a biaxially stretched film (hereinafter abbreviated as "BO" film) made by biaxially stretching polyethylene naphthalate, polybutylene terephthalate, etc., or a copolymer thereof. In particular, PET homocopolymers, and
BO consisting of a copolymer with a PET component of 90 mol% or more
Film is preferred. The thickness should be between 15 and 100 μm. Preferably it is 38 to 80 μm, more preferably 45 to 75 μm. As the soft vinyl chloride film B, a soft polyvinyl chloride film prepared by adding 10% by weight or more, preferably 20 to 60% by weight of a plasticizer to a polyvinyl chloride straight resin and/or copolymer is used. The thickness should be 40-450 μm. Preferably it is 50 to 200 μm. The synthetic fiber network C has a basis weight of 5 to 5.
150g/ ^m2 , preferably 10-100g/ ^m2 , more preferably 10-50g/ ^m2 , and JIS L 1096-
A mesh consisting of synthetic fibers with a pore volume of 50 to 95%, preferably 60 to 93%, measured according to 1979, is used. The synthetic fibers herein refer to fibers such as polyester, polyamide, aromatic polyamide, polyolefin, and polyacrylonitrile.
In particular, fibers such as polyester and aromatic polyamide are preferred from the viewpoint of strength. The shape of the mesh varies. Examples of synthetic fiber nets include the following. Rough woven fabrics (e.g. plain weave, mock weave, karami weave, etc.), weft threads (weft threads) between the overlapping vertical threads (warp threads)
These include net-like objects in which horizontal threads are sandwiched between vertical threads, vertical threads arranged alternately at equal intervals (or at arbitrary intervals), mesh-like objects in which threads are placed in a wave pattern on top of warp threads, etc. . The pore volume can be calculated using the following formula according to JIS L 1096-1979. Pore volume (%) = (S-S')/Sx100 Here, S is the specific gravity of the fiber, and S' is the apparent specific gravity. For example, the following values can be used as the specific gravity of the fiber. Polyethylene terephthalate is 1.38, nylon 6 is 1.14, polypropylene is
0.91, acrylic is 1.17. The thickness of the net-like material used to calculate S' is preferably determined by taking a cross-sectional photograph of the laminate and taking the average value of the thickness at the intertwining points of the fibers in the photograph. As shown in FIG. 1, the laminate according to this invention is obtained by sandwiching the mesh material C between the film A and the film B and fixing them to each other. Fixation is performed using adhesive 1. As the adhesive, known adhesives suitable for bonding polyester and polyvinyl chloride, such as urethane adhesives and polyester adhesives, can be used. Adhesives are used by methods such as solution coating, hot melt coating, and melt extrusion lamination. The total light transmittance of the laminate must be 20% or more. The upper limit is effectively 90%. Since the above-mentioned film A is used in the laminate according to this invention, it has high dimensional stability and shape retention. Furthermore, since the flexible film B is used, it is difficult to curl or crease, and the B sides of the film can be aligned and firmly welded using ultrasonic sealing or high frequency sealing, and then sewn. In addition, it is possible to obtain similar sewing strength using conventional sewing machines. Since the mesh material C is used, tear resistance is high. Since the total light transmittance is 20% or more, the mesh material C can be seen through and has a high design quality. If the total light transmittance is high, objects on the opposite side can be seen through the laminate. That is, it can be used for sale windows. Since Film B was used, the tear resistance of the laminate was improved. As a result, it has become possible to increase the pore volume of the net-like material C and improve the transparency and design of the laminate. Also,
By roughening the mesh of the mesh C, it has become possible to improve the transparency of the laminate and the design derived from the pattern of the mesh itself. In the laminate, the thickness of film A is
less than 15μm, the thickness of film B exceeds 450μm,
The basis weight of the net-like material C is less than 5 g/m ² and the pore volume is 95%.
If it exceeds this value, when used in a sail, the shape of the sail will easily collapse during use, and no improvement in durability will be obtained. The thickness of film A is
More than 100μm, the thickness of film B is less than 40μm,
The basis weight of the net-like material C is less than 5 g/m ² and the pore volume is 95%.
If it exceeds this, the effect of improving curls and creases cannot be obtained. Also, the thickness of film A is
The thickness of film B is more than 100 μm and less than 40 μm,
The basis weight of net-like material C exceeds 150g/ ^m2 , and the pore volume
If it is less than 50%, the effect of improving wrinkles cannot be obtained. In this way, various inconveniences occur if the conditions specified in this invention are deviated from. Next, a specific example of the manufacturing method of the laminate according to this invention will be described. After coating one side of the film A with an adhesive solution and drying it in a drying oven, the net-like material C and the film B are stacked thereon in this order and bonded under heat with a press roll to form a laminate. One side of Film A and Film B are each coated with an adhesive solution separately and dried in a drying oven. Next, films A and B
The mesh material C is sandwiched between the surfaces of the adhesive layers, and the laminate is bonded under heat with a press roll to form a laminate. After coating one side of the film A with an adhesive solution and drying it in a drying oven, the net-like material C is superimposed thereon and bonded under heat with a press roll. Next, the adhesive solution is coated and dried on the surface of the net-like material C in the same manner as described above, and the film B is layered and hot-pressed using a press roll to form a laminate. When using a coarse mesh material with a small basis weight and a large pore volume, the following method is preferred. When using a fine mesh material with a large basis weight and a small pore volume, the method described in (1) is preferred.
It is also possible to further laminate film B on the film A side of the laminate thus obtained, and in this case, it is preferable because it is not necessary to select the sealing surface when sewing with ultrasonic or high frequency sealing. The laminate according to this invention is made into a sail, for example, in the following manner. First, panels of a predetermined size and dimension are cut from the laminate obtained as described above based on the sail manufacturing drawings.
Layer the B sides of the film together, ultrasonic seal,
Using methods such as high-frequency sealing, the sail is sewn by welding without making a hole with a sewing machine needle. In this case, a seal width of 5 to 15 mm is usually sufficient for practical purposes. By doing this, the sewing strength (adhesion strength) of the sail can be dramatically increased, and the sewing part will not be damaged even in the sewing strength test, and the force that will cause normal parts other than the sewing part to stretch and deform. Even if you add it, you can make the sale more resistant to tearing. It is also possible to make the sail by conventional machine sewing. FIG. 2 shows an example of a windsurfing sail made using the laminate according to this invention. In the figure, 2 is a laminate, 3 is a resin-impregnated sail cloth commonly used in the past,
4 is the window and 5 is the mast. Note that the laminate according to this invention is not limited to that used for windsurfing or sailing a yacht. Sails are not limited to their original meaning, but also include hang glider wings, etc. Materials with an average visible light transmittance (in the wavelength range of 400 to 700 nm) of 60% or more can be used for windows installed in windsurf-in sails. The laminate may be colored as long as the total light transmittance is 20% or more. Next, Examples and Comparative Examples will be described. Examples 1 to 3 and Comparative Examples 1 to 4 used the raw materials shown in Table 1. As shown in Table 1, polyester biaxially stretched films (PET-BO films) A having thicknesses of 12, 38, 50, 75, and 125 μm were prepared. Soft vinyl chloride films B having thicknesses of 40, 80, 100, 400, and 500 μm were prepared.
The following net-like material C was prepared. Net 1: Made of PET fiber, the warp yarn is 500 denier (D), the weave density is 19 threads/inch, and the weft yarn is
500D 19/inch plain weave cloth. pore volume
66%, basis weight 83g/m ² . Net 2: Made of PET fiber, warp threads are 500D
4.5 threads/cm, and 4.5 threads/cm when the weft is 500D. It is made up of a structure in which weft threads are sandwiched between warp threads arranged alternately on top and bottom at equal intervals. Pore volume 86
%, basis weight 50g/m ² . Net 3: Using 1000D PET fiber, the warp thread spacing is 6.8 threads/10 cm, and the two sets of yarn groups corresponding to the weft threads (one thread group has a thread spacing of 6 threads/10 cm) are separated by a phase difference of 120°.
A special net-like material arranged to draw a sine curve (period: 33.5cm). Pore volume 80%, basis weight 22g/m ² . Net 4: A plain weave cloth made of 75D PET fiber with a weave density of 80 warp yarns/inch and 70 weft yarns/inch. Pore volume 44%, basis weight 49g/m ² . Net 5: Made of PET fiber, warp thread 250D, 0.5
Thread/cm, 0.5 thread/cm for weft thread 250D. It consists of a structure in which weft threads are sandwiched between warp threads arranged alternately above and below at equal intervals, with a pore volume of 98% and a basis weight of 2.8 g/m ² . In addition, as an adhesive, a 20% by weight solution of a copolyester consisting of terephthalic acid/sebacic acid (molar ratio 65/35) and ethylene glycol/neopentyl glycol (molar ratio 40/60) (solvent methyl ethyl ketone/toluene, volume 2/8) to which 4.2% of Coronate L-75 (manufactured by Nippon Polyurethane Co., Ltd.) was added as an isocyanate was used. The laminates of Examples 1 to 3 and Comparative Examples 1 and 2 were produced as follows. Adhesive was applied to PET-BO film A using a reverse coater and dried at 80°C in a drying oven. The thickness of the adhesive layer was 25 μm. At the exit of the drying oven, net material C and soft vinyl chloride film B were layered on the adhesive layer surface in this order. Pressing was carried out using a press roll heated to 150°C to obtain an A/C/B laminate. In the laminate of Comparative Example 3, the mesh of the mesh was fine, so first, the mesh C was glued to the film A to make A/C, and then the adhesive was applied to the surface of the mesh C and the film B was pasted. Combined. The laminate thus obtained was cut and a second
It was used for the windsurfing sail shown in the figure. The sewing was done by aligning the B sides of the film and using a high frequency seal. Sewing with high frequency seals uses an oscillator with an output of 40 MHz and a width of 10 mm x
Using an electrode with a length of 400 mm, heating for 7 to 9 seconds and cooling for 3 seconds.
It was decided to carry out the test under the condition of ~5 seconds. The laminate of Comparative Example 4 used two PET-BO films with the same thickness of 12 μm as used in Example 2 and one sheet of net-like material 2, and was subjected to A/C/A in the same manner as in Example. We created a laminate with a structure. Since this laminate cannot be sewn using a high-frequency welder, a conventional sewing machine was used to create a sail having the structure shown in FIG. 2. Sewing machine sewing is
Using polyester sewing thread, I performed a zigzag stitch with a stitch spacing of 6.9 stitches/inch and a stitch width of 3.5 mm. Table 1 shows the evaluation results for the laminates of Examples 1 to 3 and Comparative Examples 1 to 4 and sails using these. However, the elongation in the bias direction (45°) is 5 cm in width.
This is the elongation when a load of 9.0 kg is applied.
The shear peeling force of the seal portion was measured as the strength of the sewn portion. Based on sail design data and practical experience, the strength of the seams is 22.5Kg/25
Items exceeding mm are marked "○" because there is no tearing at the seams in practical use, and items 9-22.5Kg/25mm are marked "△" because the seams may tear slightly under harsh conditions. Items with a diameter of less than 25 mm were marked with an "×" because they tend to tear from the perforations. In addition, the curling of the sail was determined by winding a surf-in sail around a mast and leaving it for one week, then unfolding the sail again and observing the curl state of the sail. Then mark the ones with large curls with an “×”,
A case where some curl remains but disappears when the sail is strung to the mast is rated as "△", and a case where substantially no curl remains is rated as "○". To check for creases in the curls, the sail was folded, placed in a bag and left for one week, then unfolded again and observed for creases in the sail. Those with deep creases that remain clearly even when the sail is strung on the mast are rated as "x", and those with shallow creases that are not particularly noticeable when the sail is strung are rated as "○". To determine the ability of the sail to retain its shape, the sail was used for 5 hours a day for 30 days, then the sail was stretched and examined to see how well it retained its initial shape. A sail that retains its initial shape is marked as "○", a sail that has some sagging is marked as "△", and a sail that has sagged throughout and lost its shape is marked as "x". I decided to evaluate it.

[Effect of idea]

The sail laminate according to this invention has a thickness of 15~
100μm polyester biaxially stretched film A, thickness
A soft vinyl chloride film B of 40 to 400 μm and a network C made of synthetic fibers with a basis weight of 5 to 150 g/m ² and a pore volume of 50 to 95% are bonded in the order of A/C/B via an adhesive layer. Since it is laminated and has a total light transmittance of 20% or more, it is extremely resistant to curling and creases, and can be sewn using ultrasonic seals or high-frequency seals, so no force is applied to the sewing part. It's also tear-resistant, and you can even see through the other side.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the structure of a laminated body for a sail according to this invention, and FIG. 2 is an explanatory diagram of a sail using the same laminated body. 2... Laminate, A... Polyester biaxially stretched film, B... Soft vinyl chloride film, C...
Reticulation.

Claims (1)

[Scope of utility model registration request] 1 Polyester biaxially stretched film A with a thickness of 15 to 100 μm, soft vinyl chloride film B with a thickness of 40 to 450 μm, and a pore volume of 50 with a basis weight of 5 to 150 g/m ²
A mesh C consisting of ~95% synthetic fiber is A/C/
A laminate for sails which is laminated in the order of B with an adhesive layer interposed therebetween and has a total light transmittance of 20% or more.