JPH0432272Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The invention is a flexible,
It relates to film laminated cloth that is stretchable and prevents stored heat-retaining material from escaping to the outside.

<Technical background of the invention and its problems> Fabrics made by stitching stitches made from one series of threads are generally called knitted fabrics or knits (hereinafter referred to as knits). Since this knit is a fabric made by stitching consecutive stitches, each part of the threads that make up the knit are in a relatively free state, and can easily stretch in the direction of the external force, and the external force can be removed. and return to the original state.
Due to this structure, Nittsu has the following characteristics.

It is stretchy and does not wrinkle or crease easily.

Excellent drapability (hanging properties).

Structurally, there are large gaps between the threads.

Excellent flexibility.

Taking advantage of these characteristics, it is widely used mainly for clothing, and application to cold-weather clothing and bedding containing the heat-retaining material of this invention is also being considered, but it is unlikely that some of the heat-retaining material will be exposed outside. There is a problem with this. Due to the structure of knitwear mentioned above, there are gaps between the threads, and since it is stretchable, when an external force is applied in the vertical and horizontal directions at the same time, a gap expands, and the gap is filled with heat-retaining materials such as feathers. This is so that they can go outside.

Conventionally, there is a method of applying a synthetic resin solution to the base fabric to fill the gaps between the threads when waterproofing the base fabric, etc. However, when the synthetic resin solution is applied to the knitwear, However, as shown in Fig. 3, the resin 2' penetrates into the intersections of the threads 11 and fixes the intersections, which has the disadvantage of greatly reducing the original elasticity and flexibility of the knit. Ta.

<Purpose of the invention> The present invention attempts to solve the above-mentioned problems and has the following purposes.

Heat-retaining materials such as feathers do not come out,
To provide a film laminated cloth suitable for storing a heat-retaining material based on knitted fabric.

To provide a film-laminated cloth that does not impair stretchability, drapability, and flexibility, which are characteristics of knitwear, even when a film is laminated.

To provide a film laminated cloth that can be easily laminated only by thermal lamination without using a solution type adhesive.

<Summary of the invention> In order to achieve this objective, the present invention uses urethane having a thickness of 2 to 50μ and a melting point in the range of 100 to 180℃ to a fabric made by continuously stitching stitches made by one series of threads. To provide a film-laminated cloth formed by laminating films by a thermal lamination method, characterized in that the intersections of threads of the cloth are not fixed.

<Specific explanation of the idea> The present invention will be explained in detail below with reference to the drawings.

As shown in FIG. 1 of the drawings, the laminate fabric of the present invention uses knit 1 as a base fabric. A urethane film 2 is laminated on this base fabric, and the many dots in FIG. 1 indicate the positions where the threads 11 of the knit 1 and the urethane film 2 are bonded. That is, the urethane film 2 is bonded to the knit 1 over the entire surface, but at the intersections of the threads 11, as shown in FIG. 2, it is bonded only to the upper thread 11, and the lower thread 11 is not adhered to. Therefore, the intersection points where the threads 11 intersect with each other are not fixed, and the threads 11 can slide against each other.

Furthermore, since the urethane film 2 itself has flexibility and stretchability, the laminate cloth as a whole has flexibility and stretchability, and no voids are formed due to the stretchability.

The knit base fabric 1 is classified into various types depending on the knitting method, such as flat knit knit, circular knit knit, warp knit knit, etc. However, in the present invention, the knitting method is not particularly limited, and may be selected as appropriate depending on the use. Ru. Also,
The material is selected from the viewpoint of use or cost, and cotton knit, wool knit, rayon knit, acrylic knit, nylon knit, polyester knit, etc. can be used.

Thermoplastic urethane film 2 contains bifunctional polyol, glycol and diisocyanate with NCO/OH
It is a polyester-based, polyether-based, or polycaprolactone-based thermoplastic urethane resin film produced by reacting at a ratio of =0.95 to 1.1.

The thickness is 2 to 50μ, preferably 5 to 30μ; if it is less than 2μ, the strength of the urethane film will be weak and it will be difficult to apply it in practice, and if it is more than 50μ, the feel, which is a characteristic of knit fabric, will be lost. It is also impractical in terms of cost. In addition, its melting point is 100-180℃,
Preferably, it is in the range of 110°C to 160°C. If the melting point is below 100°C, it is difficult to process the film, and if it is above 180°C, the base fabric will deteriorate during thermal lamination with the knit base fabric, which is not preferable. . The thermoplastic urethane film 2 can have a two-layer structure with a release paper or release film for film manufacturing and thermal lamination processing, and the release paper or release film is removed after heat lamination with the knit base fabric. be done.

There are two methods for producing the thermoplastic urethane film 2, one of which is to dissolve the thermoplastic urethane resin in an organic solvent such as methyl ethyl ketone and apply it on a release paper or film, and then
This is a method of drying and removing organic solvents. On the other hand, thermoplastic urethane resin is heated and melted in an extruder, and T
It is a method of extrusion forming into a film by a die method, and among these, a method of laminating and extruding at least two or more layers of thermoplastic resin having peelability by a coextrusion method proposed in JP-A-58-5226,
The most preferable method is to coextrude two layers of thermoplastic urethane resin and polypropylene, for example, from the viewpoints that the thermoplastic urethane layer can be made thin and the release film can be produced at the same time.

Next, a method for thermally laminating the knit base fabric 1 and the thermoplastic urethane film 2 will be described. Thermal lamination can be carried out intermittently using a flat press, but it can also be carried out continuously between heated metal rolls with the knit base fabric 1 and thermoplastic urethane film 2 stacked together, or between heated metal rolls and rubber rolls. The method of layering through
It is also easy to work with. To give an example, when laminating a urethane film (thickness 20μ) with a melting point of 110℃ on rayon knit, (a) the metal roll temperature is 140℃, the linear pressure is
Conditions of 10Kg/cm, speed 10m/min, (b) metal roll temperature 170℃, linear pressure 10Kg/cm, speed 30m/min,
(c) Under the conditions of metal roll temperature 200℃, linear pressure 10Kg/cm, and speed 55m/min, the Nitsuto urethane film adhered with a practically sufficient adhesive strength of 200g/15mm width, and the intersections of the threads were It wasn't fixed. Generally, metal roll temperature 120~250
℃, roll pressure (linear pressure) of 3 to 20 Kg/cm, and thermal lamination speed of 5 to 70 m/min.
If the roll temperature is high, the speed can be increased.

Lamination can also be done by the so-called extrusion coating method, in which hot-molten urethane resin is extruded to form a film, and while the film is softened, it is laminated with nits, but the conditions at this time are almost the same; Under the conditions of temperature 160~220℃, Nitprol pressure (linear pressure) 0.5~10Kg/cm, speed 20~80m/min, it has practically sufficient adhesion strength, and the second
As shown in the figure, a laminated cloth is obtained in which the intersections of the threads are not fixed.

The laminated cloth of the present invention is, for example,
As shown in the figure, it can be used as a bag for storing heat retaining material 3. The bag can be manufactured by using the urethane film 2 as the inner surface and heat-sealing them together.

The most typical heat-retaining material 3 to be stored in the film-laminated cloth according to the present invention is feathers, which easily come out through the fine gaps in the base fabric, but other materials include synthetic resin down such as polyester and polypropylene. There are like materials and padded cotton.

<Effects of the invention> The film laminated cloth according to the invention, which prevents the stored heat-retaining material from coming out outside, consists of a knitted base fabric and a thermoplastic urethane film with a thickness of 2 to 50μ and a melting point in the range of 100 to 180°C. Since it has a thermally laminated layered structure, the following effects can be obtained.

The gaps between the threads of the knit base fabric are filled with a thin thermoplastic urethane film, and the heat-retaining materials such as feathers do not come out.

Thermoplastic urethane film has much better texture such as flexibility, stretchability, and drapability than other thermoplastic resin films.
It is thin at 50μ, and because it is heat laminated, there is nothing to do other than completely fixing the intersections of the threads of the knit base fabric, which impairs the stretch, flexibility, drapability, etc. that are the characteristics of the knit base fabric. Never.

Thermoplastic urethane film adheres well to fiber materials in its hot molten state, so it can be easily thermally laminated with knitted fabrics, eliminating the need to use organic solvent-based adhesives and using thermal lamination machines commonly used in textile processing. It is advantageous in terms of ease of use, processing cost, and fire risk.

[Brief description of the drawings]

Figure 1 is an explanatory enlarged plan view of the laminated cloth of the present invention, Figure 2 is an explanatory diagram of the intersection of threads in Figure 1, and Figure 3 is an illustration of the intersection of threads by waterproofing in the prior art. FIG. 4 is a sectional view showing an example of the use of the laminate cloth of the present invention. 1...knit, 11...thread, 2...urethane film, 2'...resin, 3...heat-retaining material.

Claims (1)

[Scope of utility model registration request] A film-laminated cloth made by laminating a urethane film with a thickness of 2 to 50μ and a melting point in the range of 100 to 180°C by a thermal lamination method on a cloth made by continuous stitching of stitches made by one series of threads. , a film-laminated cloth characterized in that the intersections of the threads of the cloth are not fixed.