JPS6052328A - Thermal adhesion of sheet - Google Patents

Abstract

PURPOSE:To strengthen the adhesion simply and accurately by a thermal adhesion with an acrylic resin layer interposed between opposed surfaces of sheets to adhere the sheets together as provided with a treated layer of a synthetic resin which has been so far unable to adhere only by a surface heating. CONSTITUTION:To joining a tarpaulin paper together, a polymethyl methacrylate polymer film 4 about 30mum thick at opposed surface portions and overlapped parts of these three components are joined by a thermal pressurization with a hot press roller. This makes the resin layers fused integral together to provide a strong adhesion separable. The acrylic resin film 4 herein used is preferably, for example, a polymer of polymethyl methacrylate and the thickness thereof is appropriately about 30mum. Thus, in the adhesion of sheets provided with a film layer of a synthetic resin hard to be adhered to either surface only by heating, an acrylic resin layer is interposed between the opposed surfaces of the sheets and then, a thermal adhesion is performed. This enables a strong joining thereof with ease to enhance the finishing strength with an accurate and simple work.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for heat bonding sheets, which makes it possible to bond sheets having a surface treatment layer that is impossible or difficult to heat bond.

Conventionally, polyvinyl chloride compositions have been widely used in various types of sheets, large and small sheets, cipulco retainers, and other industrial materials in general.

However, on the other hand, since the composition contains a large amount of plasticizer, its properties include the occurrence of stickiness and staining on the surface due to migration and oozing of the plasticizer, and a decrease in weather resistance. There is a big drawback.

In order to eliminate this problem, in recent years, sheets have been used that have been treated with a synthetic resin surface treatment layer to give them antifouling properties. , thermal adhesion using hot air or the like during secondary processing and molding is impossible or the adhesion performance is reduced.

For example, a sheet called "turbo sheet", which is made by coating both sides of a base fabric with a soft vinyl chloride resin composition, has a polyfluoride resin layer applied as a treatment layer on the surface of the sheet, which is made by coating a soft vinyl chloride resin composition on both sides. While maintaining flexibility and other excellent properties, it has excellent performance in terms of not only stain resistance but also weather resistance, chemical resistance, etc., but because of its surface treatment layer, it cannot be bonded by heating alone. It is impossible,
Naturally, high-frequency adhesive processing is also not possible, so during secondary processing and molding, we have to rely on three-line sewing, but in the case of two-line stitching, it becomes even more difficult! At present, it is necessary to waterproof the seams, which is a disadvantage.

In addition to the above, recently, as moisture-permeable clothing sheets,
In recent years, sheets with a two-component cross-linked or I-9 resin layer formed on one side of the Sui'J9 lid through special treatment have become widely used due to their effective properties. In this case, it is not possible to bond two cross-linked resin layers together by heating alone or by high frequency bonding.

The present invention was made based on various researches to eliminate these problems, and it was discovered that acrylic resin exhibits strong thermal fusion properties with conventional surface treatment layers, and this acrylic resin layer The present invention provides a heat bonding method for sheets, which is characterized in that the adhesive is interposed between sheets having a surface treatment layer that cannot be heat bonded, and the bonding process is performed by applying heat and pressure using hot air or the like.

Next, a specific embodiment of the present invention will be described based on the drawings.

One side (on the surface) of a sheet called turborishi, which is made of a coarse-density fabric made of synthetic fibers as a base fabric (1) and a coating layer (2) (2) of a soft vinyl chloride resin composition formed on both sides. , Bolifu・ν Kaji: A thin surface-treated resin layer (3) of RIDESI is integrally provided to constitute a sheet-like material (A) having properties such as stain resistance, weather resistance, and chemical resistance. (A) (When polymerizing and bonding the ends of the sheet to form a large sheet, as shown in Figure 1, the surface portions facing each other for joining, that is, one sheet Between the surface treated resin layer (3) and the other sheet-like material (Al backside soft vinyl chloride resin composition coating layer (2)), a polymethyl film having a thickness of 30 mm and a width corresponding to the overlap iJ is used. A methacrylic acid polymer film (4) is interposed, and the polymerized portions of these three are bonded together using Leister (hot air is blasted to soften and melt the resin layer portions, while pressure is applied with a \0-glue to continuously bond the polymerized portions. They were bonded by heating and pressurizing using a device (not shown).

However, in this case, the adhesive strength of the polymerized portion is such that the mutual resin layers are fused and integrated and cannot be peeled off. (8
) (3) Similar strong adhesion effects were obtained even when the comrades were polymerized and bonded via a polymethyl methacrylic acid polymer film (4).

In addition, as shown in Fig. 2, when bonding sheet-like materials (B) made by cross-linking or integrally layering one layer of resin (6) on one side of nylon taffeta (5), After the resin film (4) is interposed, heat bonding can be performed using Leister, and in this case as well, the bonding is strong.

Acrylic resin film used in the method of the present invention (4)
For example, as mentioned above, a polymer of polymethyl methacrylic acid is suitable, and its thickness is approximately 30.3 mm, but even if it is thicker than this, the effect will not be particularly high. No difference is recognized.

In addition, as a specific means for heating and bonding sheet-like materials together, there is Leister's method as shown in the above example, but other methods of bonding may also be used. (You may also use pressure means.)

For example, not only acrylic resin formed in the form of a film but also liquid or paint-like acrylic resin is applied to the desired parts of sheet materials to be bonded, dried with hot air, etc., and then heated and pressurized. Alternatively, a hot-melt type acrylic resin may be used to form a heat-molten resin layer on the corresponding portion and pressure treatment may be performed for polymerization bonding. In this case as well, the same bonding strength as described above can be obtained.

Next, the following tests were conducted to confirm the results achieved by the method of the present invention.

First, the surface of a soft vinyl sheet is formed by forming a soft vinyl chloride resin composition coating on both sides of the interlining using a coarse-density fabric made of synthetic fiber G. A sheet-like product that has a surface treatment layer with excellent stain resistance, weather resistance, chemical resistance, etc. by fusion-bonding a thin laminated film with resin and fluorinated resin layer so that the resin layer is the top layer. Let this sheet-like material be the sample).

The laminated film of the dinylidene fluoride resin layer and the acrylic resin layer was used in order to facilitate fusing and integration with the soft dinylidene chloride resin composition coating and to improve the ultraviolet absorption performance.

Next, when two of these samples (a) are joined together at their ends, a soft chlorinated resin is added between the surface treatment layers of sample K) (a) or between the surface treatment layer and the back surface. A polymethyl methacrylic acid polymer film was interposed between the composition films, and 17
Heat and pressure treatment was performed at 0° C. for 5 seconds. This is the product of the present invention.

On the other hand, Sample 1a) (a) was directly subjected to heating and pressure treatment under the same conditions as above without interposing a polymethyl methacrylic acid polymer film between them. This is taken as a comparative example.

As a result, in the product of the present invention, the resin layer parts at the polymerized and bonded parts were completely fused and integrated and could not be peeled off, and a peel test revealed that the interlining coarse density fabric and the soft vinyl chloride resin composition layer 19 kN/3cr
The strength value of 1'llA of n-width peeling was shown.

On the other hand, in the product of Comparative Example, there was no adhesion at all between the front fluoride resin layer surface and the back soft vinyl chloride resin layer surface of the overlapped portion, and the products were peeled off as they were.

Next, a sample (1)) was prepared in which a two-component cross-linked resin layer was formed on one side of the taffeta, and two sheets of this sample (b) were shown in Figure 2. By this method, a polymethyl methacrylic Q polymer film was interposed between the nail joints and bonded under heat and pressure. This is the product of the present invention.

On the other hand, as a comparative example, samples (b) and (b) were directly stacked on top of each other and heated and pressurized.

As a result, in the product of the present invention, the overlapping parts were completely fused and integrated and could not be peeled off, and as a result of the peel test,
It broke between the fragile resin layers. In contrast, the product of Comparative Example did not adhere at all and was peeled off.

As described above, the present invention provides a method for bonding sheets, at least one of which has a coating layer made of a synthetic resin that cannot or is difficult to bond by heating alone, between opposing surfaces of the sheets. Since this relates to a heat bonding method for sheets, which is characterized by interposing an acrylic resin layer such as a resin film, and then performing a heat bonding process, conventional techniques such as sewing machines and special adhesives have been used. The bonding of sheets with surface-treated resin layers, which had previously been bonded together, can be easily and firmly bonded by applying general heating and pressure processing, and sheets can be bonded together to form large sheet-like objects, etc. The molding process can be performed easily and reliably at low cost, and the finished strength and other performance of the product can be further improved.

[Brief explanation of the drawing]

The drawings show two embodiments of the present invention; FIG. 1 is a simplified sectional view of Example 1, and FIG. 2 is a simplified sectional view of Example 2. (Base fabric, (2) Soft vinyl chloride resin composition coating layer, (8) Surface treated resin layer, (4)...
Polymethyl methacrylic acid polymer film, (5)...
Nail taffeta, (5)... 1 tatashi resin layer, (A
) (to)... Sheet-like material. Patent applicant 31 patent attorneys representing Maruyama Industries Co., Ltd. October 17, 1980 Patent Application No. 161511 2, Title of Invention Method for heat bonding of sheets 3, Relationship with the case of the person making the amendment Patent Applicant Address Name Maruyama Kogyo Co., Ltd. 4, Agent 5, Date of amendment order: Showa Year 8 Contents of the amendment In the description, amend as follows. ) Corrected as "synthetic fiber yarn". 2) In the second line of page 10, correct the phrase "r(5) --- urethane resin layer" to "r(6 to 1-urethane resin layer") 0 or more

Claims (1)

[Claims] ■ When bonding sheets that have at least one surface treated with a synthetic resin layer that cannot be bonded by heating alone, an acrylic resin layer such as an acrylic resin film is applied between the opposing surfaces of the sheets. 1. A heat bonding method for sheets, which comprises interposing the material and then performing heat bonding processing.