JPS60219055A - Laminate for sail - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a sail laminate used for yacht sails and surfing sails.

<Prior Art> Recently, laminates of fabric and film have been partially used as sail cloths for sailboats, windsurfing, etc., and technologies related to such laminates have also been disclosed. For example, there is a laminate for sails in which a fabric is laminated on at least one side of a polyester biaxially stretched film with a thermoplastic polyester ether copolymer interposed therebetween. When used as a sail cloth in salt air or seawater spray, the peeling strength between the film and the fabric decreases over time, causing peeling between the film and the fabric. Another technology using a laminate of polyurethane and film [consists of a laminate in which a plain woven polyester film using Borien ter filament yarns for the warp and weft is bonded with an adhesive mainly composed of polyurethane; Warp direction.

A sail cloth characterized in that the elongation in the weft direction and the diagonal direction is 3% or less in total under the condition that the tensile force is tskg per 5 cm width, and the peel strength of the adhesive part is 2 kg or more per 3 cm width. ” (Utility Application No. 58-80248). This idea provides a sail cloth that has low elongation and low air permeability that could not be obtained with conventional resin-treated plain weave sail cloth, and has good running performance with little deformation during running. The plain weave used here ranges from those with gaps between yarns that are approximately twice the thickness of the yarn in both the warp and weft, to those that are dense with almost no gaps. Various variations have been used. However, in the case of this sail laminate, the transparency of the entire laminate (see-through)
As with conventional cars, the only way to look around is through the window, so there is a risk of a collision while driving. The present invention has been made to solve such problems.

<Object of the Invention> That is, the object of the present invention is to solve the problem of transparency (see-through property) regarding a laminated body for sails, and to provide peel strength and tear strength greater than that of the previous invention (Utility Application No. 58-80248). It's about staying strong.

<Configuration of the Invention> The configuration of the present invention for achieving the above object is as follows.

(1) At least one side of the coarse structure has a thickness of 5 to 100μ
, Softening point: 50-150℃, Tensile elasticity: 5-10
Thickness 1 through 0kg/ffl polyurethane adhesive
A laminate for sails made by laminating biaxially stretched polyester films of 2 to 200 μm and having a light transmission and exit of 10 to 60% (2) The above laminate for sails in which the polyurethane adhesive contains a coloring agent (3) Polyester The laminate for sails according to (1) or (21) above, in which the polyester biaxially stretched film is colorless and transparent; The laminate for sails in (1) or (2) above, in which the polyester biaxially stretched film is a colored film. The coarse structure includes woven fabrics, scrims, split cloths, net-like materials, etc. that have a high planar porosity. For example, in the case of a scrim, a scrim is used in which fibers having a total fineness of 250 deniers are used as the warp and weft, and the density is 4 fibers/cm. Coarse structures other than scrims include two-knit woven fabrics and weft-inserted knitted fabrics.

Split cloth, integrated netting, etc. can be used.

The materials that make up the coarse structure are thermoplastic synthetic resin,
Natural fibers, metals and metal compounds.

Inorganic fibers can be used, but they are lightweight and have low elongation, which are required for sail laminates.

Thermoplastic synthetic resins are preferred in view of their low moisture absorption, weather resistance, and durable pipe properties. For example, when the coarse structure is a woven fabric, the total fineness of the l11 fiber is 50 to 5000 deniers,
Single yarn fineness to 0.5! 000 denier can be used. The fabric weight is 10-500.17/m
It is preferable to use it within the range of '.

At least one side of the coarse structure has a thickness of 5 to 100μ, a softening point of 50 to 1500G, and a tensile modulus of 5 to 100 mm.
A layer of polyurethane adhesive of g/7 is provided. A coloring agent may be mixed into the adhesive layer. If the thickness is less than 5 μm, the structure is coarse and the necessary peel strength cannot be obtained. If the thickness exceeds 100 μm, the light weight of the sail laminate will be impaired. If the softening point is less than 50° C., the viscosity of the polyurethane adhesive becomes too low when a laminate is formed by heat-pressure treatment, which is undesirable, and peeling occurs during sailing. If the softening point exceeds 150° C., the heat-pressing treatment temperature must be raised to a high temperature, which impairs the properties of the film constituting the sail laminate. 100 modulus tensile elasticity height is skg
/(If it is less than 7, the stress relaxation by the adhesive layer is insufficient, so the peeling strength between the coarse structure and the film decreases.10
When the 0% tensile modulus exceeds xookg/d, the sail laminate becomes rough and hard and the equilibrium peel strength decreases. As the coloring agent, a finely powdered pigment is usually used, but a finely divided dye powder may also be used. It is also possible to adjust the light transmittance by using a transparent biaxially stretched film that is dyed without using a colorant.

Biaxially stretched polyester films having a thickness of 12 to 200 μm are laminated via a layer made of a mixture of a polyurethane adhesive and a colorant. If the thickness is less than 12 μm, it is not possible to sufficiently ensure low elongation of the sail laminate, especially low elongation in the bias direction. If the thickness exceeds 200 μm, the flexibility and lightness of the sail laminate will be impaired.

The sail laminate of the present invention has a light transmittance ranging from 10 to 60°. This light transmittance is the light transmittance when light passes through a coarse structure, a layer made of a polyurethane adhesive or a mixture of the adhesive and a colorant, and a layer of a biaxially stretched polyester film. When the light transmittance is less than 10, transparency (see-through property) is insufficient. In order to obtain a sail laminate with a light transmittance exceeding 60%, the amount of polyurethane adhesive must be extremely small, so that the properties of the sail laminate, such as its peel strength, become impractical.

In addition, the light transmittance was measured by the following method. There are 33 measuring devices
A type 0 self-recording spectrophotometer (Hitachi fR) was used for measurement using light with a wavelength of so Onm. The light transmittance was calculated using the following formula, where the intensity of the incident light on the sail laminate is Io, and the intensity of the transmitted light is ■.

Next, a method for manufacturing a sail laminate according to the present invention will be described. Taking the case of a double-sided film as an example, 0) Apply a polyurethane adhesive or a mixture of a mosquito adhesive and a coloring agent of an appropriate viscosity to one side of a biaxially stretched colorless transparent polyester film. Not a colorless transparent film,
If a somewhat opaque film is used, the adhesive and colorant mixture will be formulated to increase the transparency of the layer. The doctor knife method, kiss roll method, and doctor roll method are insufficient to obtain a uniform coating layer thickness of 5 to 200 μm, and it is most preferable to use the gravure method or the commer-doctor method.

(b) Dry the m-cloth film at a temperature of 80 to 120°C for about 1 minute.

(c) After drying, the coarse structure is sandwiched between two coated films and subjected to heat and pressure treatment. At this time, the coated film is sandwiched so that the coated surface and the surface of the coarse structure are joined. 3) The obtained laminate has a film-mixture layer-coarse structure-mixture layer-film structure, and then the laminate is subjected to heat-pressure treatment. The heat and pressure treatment is performed by passing the laminate through a pair of upper and lower nip rollers. The temperature of heat-pressure treatment is around 120℃, the linear pressure is 3 kg/cm, and the post-processing speed is 15-2
Approximately 0 m/min is used. The nip roller for hot pressing may be a multi-stage type using two or more nip rollers, if necessary.

In addition to the above method, there is also a method in which a colored film is prepared in advance, a polyurethane adhesive or a mixture of the adhesive and a coloring agent is applied to the colored film, and then heat and pressure treatment is performed to produce a laminate for sails. be. Film coloring methods in this case include, for example, a method of applying a mixture of a polyurethane-based or polyvinyl chloride-based adhesive and a coloring agent to the film, and a method of dyeing the film itself.

Effect of the Moon〉 The present invention applies a specific polyester biaxially stretched film to a rough structure by applying a specific polyurethane adhesive or a mixture of a squeezing agent and a coloring agent, or dyeing it when no coloring agent is used. By laminating transparent polyester biaxially stretched films, the following excellent effects can be obtained.

G) Compared to conventional products with a wind section, the range of vision during sailing is wider, so it is suitable for other sailboats and windsurfing boards.

The risk of collision with ships, etc. is reduced, resulting in high safety while driving.

(b) Due to its high transmittance, the sail laminate and the color of the sea harmonize well and have a unified aesthetic appearance.

(c) In the case of a sail laminate with high permeability, there is no particular need to provide a window portion, so the sewing process or the like for providing the window portion can be omitted.

2) Since the peel strength is high, the rough structure and the film will not peel off during sailing or anchoring. Therefore, the coarse structure and the film ψ do not rub against each other, and the film does not lift or wrinkle.

(f) In the case of a double-sided film, even if seawater is splashed during sailing, seawater hardly ever enters the laminate, so the weight of the laminate increases little and does not impair sailing performance.

(f) Since a polyester biaxially stretched film is used, the elongation of the laminate is low and the form stability is high, so sailing properties are good.

<Example> The present invention will be specifically explained below using Examples.

Example 1 Single yarn fineness 5 denier 1. Using polyethylene terephthalate fibers with a total fineness of 250 deniers, a scrim with a ratio of 4 scrims/cm in both the warp and weft directions was made to form a coarse structure. On the other hand, a colorless transparent biaxially stretched film with a thickness of 25μ has a softening point of 70
℃, 100 cm tensile elasticity t s kg/ffl polyester polyurethane adhesive and pigment ramie pet [F]
(manufactured by Toyo Ink ■) was applied to a layer of 70 μm in thickness using a commadator, and then
Dry at ℃ for 1 minute. Then, while sandwiching the scrim between two coated films so that the coated surface of the dried adhesive-coated film was joined to the scrim, the scrim was heated at a surface temperature of 120°C, a linear pressure of 3.3 kg/cm, and a nip roller speed of 15 m/mi.
A laminate of the present invention was obtained by continuously passing through a hot pressure nip roller twice under conditions of n.

The properties of the obtained laminate were as shown in Table 1.

Example 2 Polyethylene terephthalate fibers with a single yarn fineness of 5 denier and a total fineness of 250 denier were used, and both the warp and weft directions were 4.
A scrim with a diameter of 1/2 cm was made to form a coarse structure. On one side, a 70μ thick layer of polyether-based polyurethane adhesive with a softening point of 70°C and a 100% tensile elasticity of m15kg/crI is applied to a transparent 2@stretched film with a thickness of 25μ and which has been pressure-colored on the edge. After applying it so that
It was dried at 20°C for 1 minute. Then, while sandwiching the coarse fabric between two coated films so that the coated surface of the adhesive-coated film after drying is joined to the coarse fabric, the surface temperature was raised to 150°C.
, Linear pressure 5.7 kg/ C1rL + Nip ruler
The laminate of the present invention was obtained by passing the material through a hot pressure nip roller three times continuously at a speed of 20 m/min.

The properties of the obtained laminate were as shown in Table 1.

Examples 3-10. Comparative Examples 1 to 6 Lamination for sails was carried out in the same manner as in Example 1, except that the thickness of the adhesive layer, softening point, 10% tensile modulus, and thickness of the polyester biaxially stretched film were changed as shown in Table 1. I got a body.

Claims (1)

[Claims] (1) At least one side of the coarse structure has a thickness of 5 to 100 μm;
Softening point 50~150℃, 100cm tensile modulus 5~100
A laminated body for sails (2) consisting of polyester biaxially stretched films with a thickness of 12 to 200 μm and having a light transmittance of 10 to 60 cm via a polyurethane adhesive of kg/cIt. A laminate for a sail according to claim 1 (1) containing a colorant (3) A sail laminate (3) containing a colorant, wherein the polyester biaxially stretched film is colorless and transparent. Laminate for a sail (4) A laminate for a sail according to claim (1) or claim (2), wherein the polyester biaxially stretched film is a colored film.