JPS6326976Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to an improved padded automobile carpet in which pads made of a flexible sheet material such as rubber or thermoplastic resin are attached to desired locations on the surface of the automobile floor, deck, door trim, etc. . Conventionally used structures for attaching carpets with pads to the carpet body include the following. One of these is a structure in which the peripheral edge of the pad is sewn onto the carpet body using a sewing machine, but with this structure, the threads tend to break due to wear during use, and the gaps between the threads are Because of this, sand, water, foreign matter, etc. can easily enter the space between the pad and the carpet, and in this case, the surface of the pad may become rough, making it uncomfortable to the touch, or the surface may swell. Furthermore, in recent years, integrally molded front and rear carpets have been used, and the shape of the carpet is large, making it extremely difficult to sew with a sewing machine.As the pads fit together in an unreasonable manner, the adhesion of the pads to the carpet is poor. There was a tendency for the gaps between the threads to become larger. Also, since it is attached at a portion approximately 5 mm from the outer periphery, there is a risk of curling up on the outer periphery. Another conventional attachment structure is to adhere the pad to the carpet body using a film-like hot melt. This is described in detail in Utility Model Application Publication No. 52-133432, and its structure is 80 to 120 μm.
The vinyl chloride pad is bonded to the carpet body via a urethane silicon hot melt film. However, although this structure has advantages such as excellent flatness and good adhesive strength because it is fully adhesive, the hot melt film used is expensive, and the hot melt film is melted by heat, so the adhesive It has disadvantages such as requiring a long time for bonding, and since it is film-like, the amount of hot melt resin per unit adhesion area is limited and the hot melt cannot flow to the root of the pile. Therefore, in this case, the hotmelt was only adhered to the head of the pile, and there was a risk that the pad would become bulky or that sand, water, foreign matter, etc. could infiltrate through the gaps in the pile. Other conventional structures include thermoplastic synthetic resin pads welded to the carpet body using a high-frequency welder or the like. This structure has advantages such as extremely low material cost and flatness close to that of full-surface bonding, but there is a risk of sparks occurring during bonding, it is difficult to obtain uniform bond strength, and there is no adhesive on the back side. It is difficult to apply a high-frequency welder when a felt is attached as a syllator, or when the pad and the carpet are made of different materials, for example, when the pad is made of vinyl chloride resin and the carpet is made of polypropylene. The purpose of the present invention is to improve the conventional drawbacks by applying hot melt adhesive in a bead shape along the outer circumferential back surface of the pad and pressing it onto the pile surface before the hot melt adhesive hardens. It is an object of the present invention to provide a novel carpet for an automobile with a pad, in which the pad and the carpet are fixed and sealed at the outer periphery of the pad by allowing the pad to flow at the root. The configuration of the present invention will be explained with reference to the drawings. Fig. 1 is a top perspective view of a general carpet body with a pad, and Fig. 2 is a sectional view of the carpet with a pad at the part where the pad of the present invention is bonded. A pile 4 is planted and there is a bucking layer 6 at the bottom layer.
A hot melt adhesive 2 is applied in a bead shape to the back surface of the pad 1, and the required compressibility is applied from the upper surface of the carpet body 3 to compress the pile 4 and adhere the pad 1 to the carpet base fabric 5. The hot melt adhesive 2 is applied to the back surface of the pad 1 in a bead shape near the outer periphery (5 to 10 mm from the outer periphery) as shown in FIG. By applying the hot melt adhesive in a bead shape near the outer periphery of the pad and applying the required compression pressure, the hot melt adhesive flows to the root of the pile, widens the width of the bead, and The pad and the carpet base fabric 5 can be firmly bonded with a smaller amount of coating.
Since the base fabric 5 and the pad are directly bonded via the hot melt adhesive, no gap is created between them, and the seal is almost completely sealed, preventing sand, water, and other foreign substances from entering. Nozzle-type hot melt applicators have been widely used for sealing paper and corrugated containers, etc., but under the same conditions as for conventional seals, they do not provide good adhesion between the carpet body and pad that are the subject of this invention. No strength is obtained. In the present invention, we investigated the type of hot melt, amount of application, melting temperature, preheating of the pad, compression pressure, etc., and by appropriately selecting these conditions, we were able to obtain good adhesive strength. As a result of studying the above conditions, it was found that it is especially important to preheat the pad to 40 to 80°C. For example, if soft vinyl chloride is used for the pad, it is necessary to perform primer treatment to obtain good adhesive strength at room temperature. The following conditions are necessary to obtain good adhesive strength. (1) Hot melt...Saturated linear polyester and urethane type (2) Application amount...When applied in a bead shape on the outer periphery 1
2~15g per m (3) Melting temperature...180~220℃, nozzle temperature is
200-240℃ (4) Pad preheating temperature...40-80℃ (5) Compression pressure...0.5-10Kg/cm ³ In order to bond pad 1 to carpet body 3, preheat pad 1 in advance and The nozzle is moved along the outer periphery of the back surface of the pad 1 to apply hot melt in a bead shape. Thereafter, it is pressed into a desired position on the carmet main body 3 and joined by cooling and solidifying the hot melt resin. According to the present invention, the pad 1 and the carpet body 3 can be bonded together in a very short time. For example, if the moving speed of the nozzle is 12 m/min, the outer circumference is 1
When gluing the heel pad of m, the application time is 5
Adhesion is completed in a total of 25 seconds with 15 seconds of clamping time and 5 seconds of press operation time. When using a conventional film-like hot melt, it takes 60 to 90 seconds to bond, so compared to this, the bonding time is reduced to about 1/3 to 1/4. Further, the amount of hot melt adhesive used can be reduced as shown below. In other words, when conventional film-like hot melt is used for a 20 x 30 cm heel pad, the film thickness is 100μ and the weight is approximately 7g/.
However, according to the present invention, the amount of hot melt used is 5 g/m, and the total amount is 5 g/sheet. Furthermore, good adhesive strength can be obtained as described below. That is, Table 1 compares the case where the vinyl chloride pad is bonded under the above conditions with the conventional method using a film-like hot melt adhesive and the method of sewing with a sewing machine.

[Table] The effects of the present invention are as follows. (b) Since the hot melt adhesive is applied in a bead shape along the outer periphery of the pad, a small amount of hot melt adhesive can be applied deep into the pile and to the root of the pile, thereby filling the gap between the pad and the carpet. It becomes easy to eliminate. Furthermore, since strong adhesion can be achieved with a small amount of hot melt adhesive, it is possible to obtain a padded carpet that is cheaper and lighter than when conventional film-type hot melt adhesives are used. This is important when adhering pads to porous surfaces such as carpet pile surfaces. (b) It has extremely high wear resistance because the threads do not come out on the surface of the pad, unlike when sewing with a sewing machine. (c) Related to (a) and (b) above, hot-melt adhesive is applied in a bead shape along the outer periphery of the pad, and the pad and carpet are firmly joined and adhered to each other, making it easy to sew. dust, water, etc.
There is no possibility that sand or other foreign matter will get between the pad and the carpet and make it uncomfortable to use. As described above, according to the present invention, it is possible to obtain a padded carpet that is inexpensive, does not allow foreign matter to enter during use unlike conventional padded carpets, and has good usability and durability.

[Brief explanation of the drawing]

Fig. 1 is a top perspective view of a typical padded carpet, Fig. 2 is a sectional view of the padded carpet at the part where the pad of the present invention is adhered, and Fig. 3 shows the application of the bead-shaped hot melt adhesive of the present invention. FIG. 3 is a perspective view of the back side of the pad. 1... Pad, 2... Bead-shaped hot melt adhesive, 3... Carpet body, 4... Pile, 5
...Carpet base fabric.

Claims (1)

[Scope of utility model registration request] It is composed of a pad, a hot melt adhesive applied in a bead shape to the back surface of the pad, and a carpet that is crimped on the pile surface to the back surface of the pad via the hot melt adhesive, and the hot melt adhesive is heated. It is applied to the back side of the pad in a molten state and is pressed to the pile surface before solidifying, so that it flows to the root of the pile, and the pad and carpet are fixed and sealed at the outer periphery of the pad. A carpet for automobiles with pads, which is characterized by: