JPS59227416A - Mark molding method of carpet surface - Google Patents

Abstract

PURPOSE:To strengthen the close adhesiveness of a mark and a carpet, by a method wherein the base cloth surface of the carpet is preliminarily placed so as to be contacted with a hot platen held to a specific temp. and the mark held to a specific temp. is pressed to the carpet from the side of the sheet for constituting the mark by a mark mold. CONSTITUTION:The base cloth surface of a carpet is placed so as to be contacted with a hot platen held at 150-280 deg.C and a thermoplastic rubber sheet or a synthetic resin sheet for constituting the mark is placed on the desired surface position of the carpet. In this state, the carpet and the sheet are pressed from the sheet side by a mark mold held at 40-140 deg.C to perform weld molding by conductive heat from the hot platen and the mold. Because the sheet 3 is welded to the pile surface 4 of the carpet by conductive heat from the hot platen 6 and the mark mold 1, as the base cloth material 5, it is necessary to select a material which is not softened and shrunk by the temp. of the hot platen 6 and is not stretched even under high compression force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming marks from carpen 1 to mat, and in particular, the present invention relates to a method for forming marks from carpen 1 to mat, and in particular, the use of thermoplastic rubber for general floor mats such as automobile floor mats, entrance mats, and indoor mats. The present invention also relates to a method for forming marks on a carpet mat, in which characters and picture marks made of a synthetic resin sheet are fusion-molded.

Conventionally, there is a method of welding a thermoplastic synthetic resin mark to a carpet surface using a high-frequency welder. However, this method requires high-frequency heating to be performed with the carpet piles completely compressed and the air between the piles expelled.
Combined with the low dielectric constant of carpet 1Ii1t,
It is difficult to obtain the temperature necessary for welding, resulting in insufficient welding. Therefore,
In order to achieve complete welding, the carpet and thermoplastic synthetic resin sheet are compressed under high pressure and welding is carried out under the conditions of Takayama no J's high frequency welder. However, because of that,
Sparking accidents often occur, resulting in a large number of defective products. In addition, the method of forming marks on the carpet surface using a high-frequency welder is useful when a vinyl chloride sheet with a high dielectric constant is used as the marking material, but it is useful when a thermoplastic synthetic resin sheet or a thermoplastic rubber sheet with a low dielectric constant is used as the marking material. When this is done, the heat generated by the high-frequency I-ruder is small, resulting in insufficient welding.

Alternatively, there is a method in which a mark is formed in advance using thermoplastic 4Bl resin or rubber, and the mark is fixed to the surface of the carpeller using an adhesive.

However, with this method, it is difficult to accurately, uniformly, and efficiently apply glue to a predetermined position on a hairy surface such as the surface of the carpeller 1, and to align the paste. In addition, it is difficult to completely compress the carpet pile, so if it gets wet during use, water will be trapped between the mark and the carpet, and it will not dry for a long time, adversely affecting the adhesive interface. Easy to cause peeling accidents.

The present invention was completed after extensive research in order to solve these conventional drawbacks. We discovered that by heat-sealing the mark to the carpet surface, regardless of its height, it is possible to easily form a mark with excellent adhesion horns on the carpet surface. In other words, the carpet base fabric side is placed in contact with a heating device kept at a temperature of 150 to 280°C, and the thermoplastic rubber sheet or synthetic resin sheet that constitutes the mark is placed at the desired position on the surface of the Y-PET. A sheet of thermoplastic rubber or synthetic resin is applied to the surface of the carpeller 1 by applying pressure with a mark molding mold kept at a temperature of 40 to 140°C, and using conductive heat from the heater and the mark molding mold. It is characterized by fusion molding at a desired position.

The thermoplastic synthetic resin used in the present invention is one used in the general market, typified by soft vinyl chloride. In addition, thermoplastic rubber refers to styrene butadiene block copolymer (SBS), styrene isoprene block copolymer (813), jM vinyl resin alone, or to these,
It is a blend of natural rubber and synthetic rubber, and is a rubber-containing material that exhibits excellent flexibility and practical physical properties in a non-crosslinked state. In addition, pigments, reinforcing agents, fillers, softeners, plasticizers, anti-aging agents, lubricants, stabilizers, etc. are added to this, and cross-wire rolling is performed.

The present invention is characterized in that the thermoplastic rubber or synthetic resin sheet 3 is fused to the pile surface 4 of the carpet using conductive heat from the heater 6 and the mark molding die 1. Therefore, it is necessary to select a material for the base fabric 5 of the carpet that does not soften or shrink at a temperature of 5186, and does not stretch even under high compression.

The mark molding mold 1 is made with unevenness according to the design of letters and pictures.
0 Furthermore, in order to improve mold separation, it is effective to apply a mold release agent to the mold surface, and it is even more effective to coat the surface of the mark molding mold 1 with a fluororesin.

The effects of the present invention will be explained as follows.

Even if the pressure bonding force, fusion bonding, and molding temperature are high, there is no risk of spark accidents as in welding methods using high-frequency welders, so there are fewer defects.

Unlike high-frequency welders, mark materials with low dielectric constants can also be used as mark materials.

Equipment costs are low, and unlike high-frequency welders, there are no problems with radio interference.

The conductive heat from the heater and the mark molding die sufficiently heats the carpet pile and compression molds it, so the mark and the carpeter h are in perfect contact.

Therefore, there is almost no water absorption in the pile of the carpeller 1~ in the mark fused part, and even if the carpeller 1~ mat is washed with water, it dries quickly and there is no problem of peeling of the fused part.

Since the mark is formed and fused at the same time, the material cost is lower, the number of man-hours is less, and the cost is lower than when the mark is fixed using an adhesive or the like.

In other words, since the defect rate is low and the cost is low,
In addition to picture marks and text marks, this molding method can also be applied to molding pads, patterns, etc. onto the carpet surface.

Hereinafter, the present invention will be further explained with reference to Examples.

Example 1 Formulation example (1) Parts by weight Styrene-butadiene block copolymer (SBS) 100 Light calcium carbonate 80 Paraffinic process oil 30 Phenol anti-aging agent
titane monoxide
10 Anatomy 221 Formulation example (2) Part by weight Hiker 1
042 (NB11) 100 Zeon PVC 1
21 100DOP (Plasticizer) 2
0 Nip seal VN3 (white carbon) 40 Titanium oxide 10 total
270 combination example (3)
Weight part Zeon PVC 121
100DOP (plasticizer)
50 Light calcium carbonate 50 Zinc stabilizer 2 Lubricant
0.5 combination example (1
), (2), and (3) are kneaded using heated rolls at a temperature of ioo°C to 130°C. This is rolled into a sheet of 0.3 to 0.4 size to obtain a white thermoplastic rubber sheet or thermoplastic synthetic resin sheet. This is cut to be 10IIIL larger than the vertical and horizontal dimensions of the mark 1 engraving mold 1. As shown in FIG. 1, place the surface of the carpet base fabric 5 in contact with the heating plate 6, and place the above-mentioned white thermoplastic rubber sheet or thermoplastic synthetic resin sheet 3 at a predetermined position on top of it. , Pressing is repeatedly performed on the adhesive surface using the mark molding die 1 at a pressure of 5 kg/cTl twice for 4 seconds. Mark mold 1
When the extra outer circumference cut by the protrusion 2 cutting off the extra outer circumference of the molding mark provided on the periphery of the carpet is removed, a carpet mat according to the molding method of the present invention is obtained.

As described above, the mark obtained by the mark forming method of the present invention has strong adhesion between the mark and the carpet, and there is no problem of peeling during use, and
b) It has the major characteristics of no defects and low cost.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the molded structure of a carpet mat before marks are formed in one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the molded structure of the carpet mat after the marks are formed. be. 1...Mark molding mold 2...Protrusion for cutting and covering the excess outer periphery of the molding mark provided in the mark molding mold during molding 3...Sheet of thermoplastic rubber or synthetic resin 1-4...
- Carpet pile 5... Carpet base fabric 6... Heater. Patent applicant Hayakawa Rubber Co., Ltd.

Claims (1)

[Claims] 1. Place the carpet base fabric surface in contact with a heating plate kept at a temperature of 150°C to 280°C, and place a sheet of thermoplastic rubber or synthetic resin constituting the mark at a desired position on the carpet surface, From above, pressure is applied using a mark molding mold kept at a humidity of 40°C to 140°C, and thermoplastic rubber or synthetic resin sheet 1 is applied to the carpet surface using conductive heat from the heating plate and the mark molding mold. 1. A method for forming marks on the surface of a carpeller 1, which is characterized by fusion molding at a desired position.