JPS5813351B2 - Laminated product processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing a laminate product such as artificial turf, and more particularly to a novel method for processing a packing material for the laminate product.

Conventionally, this type of laminate product is made into a semi-finished product by applying a fluid plastic resin such as vinyl chloride paste as a packing material to a base fabric with piles planted on it, which is then heat treated to gel and fix the resin to create a finished product. .

In this case, if gelation and fixation are not performed sufficiently, the packing material will lack the toughness, and some of the material will seep through the weaves or stitches of the base fabric and gel and fix, integrating the base fabric, pile, and resin. This results in insufficient bonding, which causes the pile to fall out, causing the packing material to peel off from the base fabric, and furthermore, causing cracks in the packing material, which has a significant negative impact on the quality of the product.

In particular, when the thickness of the packing material layer is large, the plastic used for the packing material has poor thermal conductivity, and even though its surface is gelled and fixed, it does not reach the contact surface between the base fabric and the packing material. As a result, the gelation and fixation are insufficient, and the above-mentioned drawbacks become conspicuous.

In particular, when using a heat-sensitive plastic such as vinylidene chloride for the pile planted in the base fabric, if vinyl chloride resin is used as the packing material, the gelation and fixation temperature will be 16
In this case, the heating temperature could not be raised above 90° to 120°C even though it needed to be 00° to 190°C, and in the end, the temperature on the pile side was lowered and the heating temperature from the back side of the packing material was increased to form a gel. However, sufficient gelation is difficult in the vicinity of the base fabric surface where the pile is planted, and the above-mentioned drawbacks become even more pronounced.

In addition, the packing material is usually formed into a foam material in consideration of its cushioning properties, but in this case, since it contains air, the thermal conductivity deteriorates further, and if the packing material is thick or if it is heated from the back side of the packing material, it will become worse. It was inconvenient.

The inventors of the present invention have repeatedly studied various processing methods that can eliminate these drawbacks and always achieve a good gelling state even at the boundary between pile, base fabric, and packing material. The thermoplastic resin such as vinyl chloride paste to be applied is gelled and fixed by continuous passage through a high-frequency electric field accompanied by instantaneous self-heating inside each part, and then high-frequency heating is applied to make the effect noticeable. Previously, other preliminary heat treatments such as hot air, infrared rays, etc.
In addition to gelling and fixing a part of the product, it also helps reduce the temperature rise and shorten the high-frequency heating time.Furthermore, by forced cooling after high-frequency heat treatment, the sticky plasticity is quickly removed, making it easier to pack. The structure of the material stabilizes quickly and becomes dense and uniform, increasing its toughness. Especially in the case of foam-type packing materials, there is no collapse or distortion of the bubbles within it, resulting in extremely good results in terms of cushioning properties, strength, etc. This discovery led to the completion of the present invention.

The present invention consists of four inventions. The gist of this processing method is to gel and fix the resin by continuously passing the semi-finished laminate product through a high-frequency electric field, and the base fabric is a knitted fabric made of synthetic fibers or natural fibers, especially filament yarn. Plain weave is often used, and suitable materials include polyester, nylon, and vinylon.

In addition, the pile is usually made of rough and rigid fibers such as vinyl chloride resin, vinylidene chloride resin, copolymers thereof, nylon, Tetron polypropylene, etc., and the packing material is made of vinyl chloride resin or vinyl chloride that generates heat internally in a high-frequency electric field. - It is preferable to use something that contains vinyl acetate copolymer, urethane, etc., and has fluidity such as a paste form in order to be sufficiently adhered to the base fabric.

In addition, a high-frequency induction heating device is usually used to create a high-frequency electric field, but if a high frequency of several megahertz or more is used in this case, the above thermoplastic resin can be directly heated by heat generated from inside, and the hot air It is possible to heat uniformly in a shorter time compared to heating with infrared rays, etc., and even areas where heat is difficult to penetrate sufficiently with hot air, infrared rays, etc., and gelation and fixation is significantly promoted overall.

Taking the case of PVC paste as an example, it is usually applied to packing materials with a thickness of 1 to 2 mm with very good results;
Even if the thickness is more than m, it is gelled and fixed uniformly without any variation.
Furthermore, it was found that even when the thickness was 10 mm or more, gelation and fixation were generally performed well.

In the present invention, semifinished laminate products that are continuously transported are successively introduced into a high-frequency electric field.

Next, the second invention will be described.

Of course, even if a packing material made of thermoplastic resin is allowed to cool naturally after high-frequency heating, the gelling and fixing effect will not be impaired, but if forced and rapid cooling is performed, the packing material will solidify and stabilize its shape. It has been confirmed that the structure is promoted, the structure becomes dense and uniform, and the toughness becomes even greater.

In particular, when a foam-type packing material is used, good cushioning properties are maintained without collapse or distortion of the foam during cooling.

Forced cooling is usually performed by contact with cold air or cooling rolls, but other methods may also be used.

In addition, the third invention provides a preliminary heat treatment using hot air, infrared rays, etc. before introducing the semi-finished laminate product into a high frequency electric field to allow gelation to progress to a considerable extent, and then complete gelation is performed by high frequency heating. It is something.

In this case, there is a large economic effect in terms of equipment and energy consumption.

Finally, in addition to the third invention, the fourth invention performs forced cooling similar to that in the second invention, and the second and third invention
This can also have the effects of the invention.

Next, the present invention will be described based on examples with reference to the drawings.

The attached drawing is a sectional view showing a semi-finished laminate product according to the present invention.

This semi-finished laminate product is made by fixing a thermoplastic resin-containing material 3 as a packing material to a base fabric 2 on which piles 1 are planted, and there are four different modes of this fixation as described below.

Example 1 PVC paste was used as the thermoplastic resin-containing material, and its thickness was 7 mm.

This one has a frequency of 13.4 MC, anode output of 3.5 kW,
The sample was passed through a high-frequency heat treatment machine at a treatment speed of 4 m/min and a residence time of 1 minute, and gelation and fixation to the base fabric was well performed.

Example 2 A vinyl chloride/vinyl complex acid copolymer was selected as the resin-containing material, and its thickness was set to 7 mm.

After continuously passing through the same electric field as in Example 1, the sample was forced to cool by passing through a cooling cylinder at a temperature of 4° C. As a result, gelation and fixation were extremely good.

Example 3 A urethane resin-containing material was selected as the resin-containing material, and its thickness was 7 mm.

Before being continuously placed in the same electric field as in Example 1, it was pre-dried by passing through an infrared device.

The results showed that gelation and fixation were extremely good.

Example 4 A PVC paste similar to that in Example 1 was applied to a thickness of 7 mm, passed through an infrared device similar to that in Example 3, and then connected to a high-frequency electric field under the same conditions as in Example 1. , Cooling was performed in the same manner as in Example 2.

The results were better than any of the previous three cases.

The present invention is based on the above-mentioned configuration, and solves the problem of thermoplastic resin packing in artificial turf, floor mats, etc., where the thickness of the packing layer is relatively large, which has not been solved in the past. It can completely gel and fix the parts where the pile, base fabric and packing material come into contact with each other, and as a result, the quality of this type of laminate is improved, especially the toughness, durability, cushioning properties, etc., and the pile is prevented from coming off. This invention is extremely useful in practice, and can have a remarkable effect on good bonding between the respective interfaces of the pile, the base fabric, and the packing material.

[Brief explanation of drawings]

The accompanying drawing is a sectional view of a semi-finished laminate product according to the present invention. 1...Pile, 2...Base fabric, 3...
...Packing material made of thermoplastic resin-containing material.

Claims (1)

[Scope of Claims] 1. A semi-finished laminate product made by applying a thermoplastic resin-containing material such as vinyl chloride paste to a packing of a base fabric in which piles are embedded is continuously passed through a high-frequency electric field to absorb the heat. A method for processing a laminated product, comprising fixing a plastic resin-containing material to the packing. 2. A semi-finished laminate product made by applying a thermoplastic resin-containing material such as vinyl chloride paste to a base fabric packing with piles is continuously passed through a high-frequency electric field, and immediately after it is forcedly cooled, the thermoplastic resin is removed. A method for processing a laminated product, comprising fixing a resin-containing substance to the packing. 3 A semi-finished laminate product made by applying a thermoplastic resin-containing material such as vinyl chloride paste to a base fabric packing with piles planted thereon was preliminarily heat-treated using heating means other than high-frequency heating such as hot air or infrared rays. A method for processing a laminate, which comprises subsequently passing it continuously through a high-frequency electric field to fix the thermoplastic resin-containing material to the packing. 4. A semi-finished laminate product made by applying a thermoplastic resin-containing material such as vinyl chloride paste to a base fabric packing with piles embedded therein was preliminarily heat-treated using heating means other than high-frequency heating such as hot air or infrared rays. A method for processing a laminate, which comprises passing the laminate continuously through a high-frequency electric field, followed by forced cooling immediately thereafter to fix the thermoplastic resin-containing material to the packing.