JP3229607B2 - Continuous production method of self-adhesive tile carpet set - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for continuously producing a self-adhesive tile carpet set.

[0002]

2. Description of the Related Art A tile carpet in which a flexible resin composition represented by a vinyl chloride resin is laminated as a backing layer on the back surface of a facing material represented by a pile cloth and cut into a predetermined size is excellent. In recent years, it has been rapidly spreading due to its ease of construction compared to roll-shaped carpets, in addition to its characteristics as a carpet such as designability, walking properties, and dimensional stability.

Conventionally, such a tile carpet is constructed on site by (A) a method in which an adhesive is applied to the floor surface in advance and dried, and then the tile carpet is attached to the floor surface, or (B) a predetermined method is applied to the back surface in advance. There is a method in which a self-adhesive tile carpet in which an adhesive is applied to a pattern is directly attached to a floor surface.

In the method (A), a curing period in which the pressure-sensitive adhesive applied to the floor surface is sufficiently dried to exhibit a predetermined adhesive strength is required, and the tile carpet must be waited until then. In addition to the poor workability, such as being unable to enter the adhesive-applied part during the sticking operation, the large amount of adhesive cans generated at the work site,
Furthermore, depending on the adhesive application and drying conditions, there is a problem that the adhesive is extruded from the tile abutting portion during walking use after the completion of the tile carpet construction, but the method (B) requires these methods. Is an excellent construction method capable of providing a quick, reliable, and comfortable working environment, and has been widely used in recent years.

[0005] Such self-adhesive tile carpets are:
In order to avoid the problem of design deterioration due to adhesion of adhesive to the carpet surface, it is transported to the construction site in the form of a set of two superposed on the back, so two tiles at the construction site It is required that the carpets have excellent releasability (Japanese Patent Publication No. 6-68205, Japanese Patent No. 2693362, etc.). And conventionally,
The self-adhesive tile carpet set was manufactured and heated and dried in a discontinuous process in which an adhesive application process, an adhesive heat drying process, and a superposition process of two tile carpet back surfaces were separated from each other. Tile carpets are backed together after being left for a long time,
In such a discontinuous process, the productivity is low, but there is no particular problem as a product.

[0006]

However, in order to greatly improve the productivity of the self-adhesive tile carpet set, if the above-mentioned steps are to be made continuous, a new problem which has not occurred at all in the non-continuous steps. Was found to occur. That is, immediately after applying an adhesive to the back surface of the tile carpet and drying by heating, two tile carpets are immediately superimposed on each other. This is a problem in that they are firmly adhered to each other, making it extremely difficult to peel off each other at the construction site.

[0007] The present invention solves the above-mentioned problems in the continuous production of a self-adhesive tile carpet set, which was not known at all, and provides a self-adhesive tile carpet set having good mutual peelability with high productivity. It is an object of the present invention to provide a method which can be manufactured by using the method.

[0008]

In order to continuously produce a self-adhesive tile carpet set, the above-mentioned object is to apply an adhesive on a back surface of the tile carpet in a predetermined pattern, heat and dry, and subsequently remove the adhesive. The problem is solved by a continuous production method of a self-adhesive tile carpet set, wherein two tile carpets are superposed on each other in a state of being actively cooled and solidified to reduce the adhesiveness.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A tile carpet to which an adhesive is applied in the present invention is conveyed with its back face up on a rotating belt having releasability, and the adhesive is applied in a predetermined pattern. Thereafter, dried in a drying step, then the adhesive is actively cooled and solidified in a cooling step,
After the adhesive strength when the adhesive surface comes into contact with the back surface of the new tile carpet is reduced, the back surfaces are overlapped in the overlapping process to form a self-adhesive tile carpet set.

[0010] The pressure-sensitive adhesive used in the present invention is not particularly limited, but when the resin composition to be the backing layer of the tile carpet contains a plasticizer, the adhesive force accompanying the transfer of the plasticizer to the pressure-sensitive adhesive. It is preferable to use a cross-linkable acrylic pressure-sensitive adhesive which causes little deterioration over time. The use form of the pressure-sensitive adhesive is not particularly limited, but an aqueous emulsion type is recommended from the viewpoints of working environment, ease of handling, and the like.

When applying the adhesive in a predetermined pattern to the back surface of the tile, a screen printing machine can be suitably used. In this case, the pattern to be employed is not particularly limited, but the application of the adhesive to the entire back surface of the tile is not preferable because it makes it difficult to peel off the tile carpets at the construction site of the obtained tile carpet set.

The most preferred coating pattern is described in
No. 68205 discloses a pattern in which pressure-sensitive adhesives do not directly contact each other when they are overlapped with each other, but even when the pressure-sensitive adhesives partially contact each other, the mutual peeling workability at the construction site is low. There is no particular problem as long as it is within a practically acceptable range.

The tile carpet coated with the adhesive in a predetermined pattern is then continuously conveyed to a drying step,
After being heated and dried, it is actively cooled.

According to the results of the study by the present inventors, this drying step in the manufacturing process of the tile carpet set, and
Subsequent cooling process is performed in the case of tile peeling from the construction surface due to re-construction etc. It has been found that the self-adhesive tile has a great effect on the practical performance, such as re-peeling stability without adhesive residue on the construction surface.

[0015] That is, there is no particular problem as long as the drying conditions are basically within a range that does not adversely affect the performance of the adhesive or the tile carpet itself. However, the drying temperature is raised in order to complete the drying as quickly as possible. Setting to is not always a good idea. In this case, as the drying temperature increases, drying of the pressure-sensitive adhesive surface layer is rapidly accelerated, and the pressure-sensitive adhesive polymer becomes a film-like film and covers the surface of the pressure-sensitive adhesive layer. Evaporation of water and volatile medium from the inner layer of the agent layer is significantly inhibited, and it takes a long time to dry unexpectedly.In addition, depending on the adopted temperature, the water and volatile medium in these inner layers may break through the film-like coating. A phenomenon of bumping is observed, which causes a variation in the adhesive strength of the obtained adhesive layer.

For this reason, the drying temperature to be employed is preferably set to 80 ° C. or lower, and more preferably to be dried using warm air at 40 ° C. to 65 ° C. for 3 to 15 minutes.

The tile carpet, in which the adhesive has been sufficiently dried in the drying step, is subsequently actively cooled. In this case, if two tile carpets are continuously superimposed on each other without actively cooling, Since the temperature of the adhesive is still high and the viscosity of the adhesive itself is low, the adhesive is in a very high state, and the resulting tile carpet set has an application pattern in which the adhesives do not contact each other and are easy to peel off from each other However, it is very difficult to peel off each other even when the method is adopted.

For this reason, in the present invention, the tile carpet that has passed through the drying step is successively passed through the cooling step to actively cool and solidify the adhesive, thereby reducing the adhesiveness of the adhesive, thereby solving the above-mentioned problem. Things.

The preferred cooling condition in the present invention is 10
The cooling is performed using cold air of ~ 35 ° C for 3 to 15 minutes. By actively incorporating such a cooling step, a tile carpet set having excellent mutual peeling characteristics can be produced with high productivity. It becomes possible to manufacture continuously.

The superposition of the back surfaces of two tile carpets is performed efficiently, for example, by inverting every other tile carpet running in a row and superimposing the two tiles on the back surface. , While running in parallel, sequentially invert the tile carpets in one row,
A method of sequentially superimposing two tiles on the other side with the tile carpet in the other row is also suitably adopted.

[0021]

The present invention will be described more specifically with reference to the following examples.

(Example 1) A pile fabric of nylon fibers was used as a surface layer material, and a resin composition consisting of 100 parts by weight of vinyl chloride resin, 500 parts by weight of calcium carbonate, and 90 parts by weight of DOP was used as a backing layer. The cut tile carpet was run on a rotating release belt with the back side of the tile carpet facing upward in line with the speed of the pressure-sensitive adhesive application step, and was conveyed to the pressure-sensitive adhesive application step.

A screen printing machine is used to apply the adhesive.
Acrylic adhesive (solid content 60%, moisture 40
% Of an aqueous emulsion type), and the amount of the adhesive applied to the back side of the tile carpet in the pattern illustrated in FIG.
Print coating was performed at 0 g / m ² .

Next, the tile carpet is conveyed to a drying step heated by warm air of 60 ° C. and dried by passing through the apparatus for 5 minutes, followed by a cooling step of 8 ° C. And the surface temperature of the adhesive is 22 ℃
Lowered.

Subsequently, the tile carpets are run in one row, and the carpets are inverted in the running direction every other sheet by a reversing machine. A self-adhesive tile carpet set was continuously produced by superimposing on a tiled carpet.

After stacking 10 sets of the obtained tile carpet sets and allowing them to stand for 2 months, the lowermost tile carpet set was taken out and subjected to mutual peeling. It was easily peelable and this was applied to the floor. However, it showed sufficient adhesive strength and peeled off from the floor one month after the installation, and there was no adhesive remaining on the floor.
Even if it was placed on the floor again, it exhibited excellent peeling stability with sufficient adhesive strength.

Comparative Example 1 A self-adhesive tile carpet was produced in the same manner as in Example 1, except that the tile carpet was passed through a drying step and then passed through a step of overlapping the back surfaces of the tile carpets without passing through a cooling step. The set was manufactured. After stacking 10 sets of the obtained tile carpet sets and leaving them for 2 months in the same manner as in Example 1, when the bottom tile carpet set was taken out and subjected to mutual peeling, it could be a great hindrance to construction work on site. It took obvious power.

[0028]

According to the present invention, a remarkable effect that a self-adhesive tile carpet set having good mutual peelability can be continuously produced with high productivity can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing an application pattern of an adhesive on the back surface of a tile carpet adopted in Example 1.

[Explanation of symbols]

 1 Area where adhesive is applied 2 Area where adhesive is not applied

────────────────────────────────────────────────── ─── Continuing from the front page Examiner Kenji Sano (56) References JP-A-11-293902 (JP, A) JP-A-11-241481 (JP, A) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) D06N 7/00-7/06

Claims (4)

(57) [Claims] 1. In continuously producing a self-adhesive tile carpet set, an adhesive is applied in a predetermined pattern to the back of the tile carpet, heated and dried, and then the adhesive is cooled and solidified positively. A method for continuously producing a self-adhesive tile carpet set, wherein two tile carpets are superimposed on each other with reduced properties. 2. Drying by heating with hot air of 40 to 65 ° C. for 3 to 1 hours.
The continuous production method of a self-adhesive tile carpet set according to claim 1, wherein the solidification is performed for 5 minutes, and the cooling and solidification is performed for 3 to 15 minutes with cold air at 10 to 35 ° C. 3. A method in which a plurality of tile carpets whose adhesives have been cooled and solidified are turned over every other sheet while running in a row.
The tile carpets are overlapped on the back side.
Or the continuous production method of the self-adhesive tile carpet set according to 2. 4. The tile carpet of one row is sequentially inverted while running a plurality of tile carpets in which the adhesive has been cooled and solidified in parallel, and the tile carpets of the other row are overlapped with each other on the back side. Manufacturing method of self-adhesive tile carpet set.