JPH0314950B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underlay sheet that is used by being interposed between an article and a surface on which the article is placed, in order to prevent the article from easily coming off and moving due to external force. This is intended to prevent the carpet placed on the floor from shifting during use.

Carpets are sometimes used without being attached to the floor so that they can be easily removed when replacing or cleaning the carpet.

This type of floor mat is often used in car mats, entrance mats, bathroom mats, accent rugs (placed in parts of the room), electric heating carpet surface protection covers, etc., but these carpets are Carpets are used because they are small (often less than 4 and a half tatami mats) and light overall, and also require regularity and shape stability, as they can be finished into a plate shape even though they are flexible. It is easy to shift and move due to foot pressure friction. To prevent this, it is possible to interpose a sponge with rubber elasticity and a high coefficient of friction on the back of the carpet, or to stick it together, but these methods do not allow the carpet to stick to the floor. When a relatively smaller carpet (hereinafter referred to as "secondary carpet") is placed on top of a carpet with raised cut pile (hereinafter referred to as "primary carpet"), it is not possible to prevent the displacement and movement that occurs when a relatively smaller carpet (hereinafter referred to as "secondary carpet") is placed on top of a carpet with raised cut pile (hereinafter referred to as "primary carpet").

This shift of the secondary carpet is caused by the raised pile of the primary carpet tilting directionally due to the foot pressure received from above the secondary carpet, and the secondary carpet touching the tip of the tilted raised pile also slightly tilting. As the pile pile of the primary carpet shifts and the foot pressure is removed, i.e., after walking, the pile pile of the primary carpet returns to its original upright state due to its elastic recovery force. This is explained by the fact that the secondary carpet is not pulled back to its original position, and as a result, the secondary carpet gradually shifts and moves significantly due to the repeated foot pressure applied during frequent walking.

Therefore, the present invention is intended to effectively prevent slippage not only on flat floor surfaces such as linoleum floors, but also on primary carpets.

That is, according to the present invention, an undersheet for preventing slippage and movement is interposed on the back side of the carpet, and this undersheet has granules on at least one side of the base sheet and rubber elasticity on the surface of the granules. It is formed by being coated and fixed with a polymeric material having a granule thereof, and giving irregularities due to its particles.

The figure shows an embodiment of the present invention. In the figure, 1 is an underlay sheet, and latex composition layers 3 and 3' are coated and laminated on the front and back sides of a base sheet 2,
One side has soft rubber elasticity (the property of being easily and largely elastically deformed even by a slight external force).
The granules 4 are sprayed together with a solution of a polymeric substance having is formed.

As the base sheet, a material that is dimensionally stable in the vertical and horizontal directions, such as a woven fabric or a nonwoven fabric, is used.

The granules used are non-foamed or low-foamed ones (1.2 times to 3 times foamed is best), such as strong rubber elastic bodies such as sponges for automobile tires and footwear, preferably 5 to 30 mesh. Use a polygonal shape that has been crushed to a certain degree.

As the polymer material for coating the surface of the particles, natural or synthetic rubber latex or soft resin emulsion such as acrylic or ethylene vinyl acetate mixed with tactile fire is used. In this case, appropriate amounts of auxiliary agents such as crosslinking agents, vulcanizing agents, anti-aging agents, and thickeners are added and used, but fillers such as calcium carbonate, aluminum hydroxide, and barium sulfate are used at around 100 PHR (Per Hundred Resin). Do not mix in large amounts.

In order to coat the surface of the granules with a polymeric material having soft rubber elasticity, as mentioned above, the granules are mixed with a latex compound, which is a polymeric material, and this is sprayed onto the base sheet at the same time as it is fixed. Alternatively, the coating may be carried out by applying a latex compound containing particles onto the base sheet using a roll coater, a doctor, or the like.

In this case, the blending weight ratio of the latex compound and the granules should be about 100:50 to 150, and the standard coating amount to the base sheet should be about 0.5 to 2 kg/ ^m2 , and the blending ratio and coating amount should be adjusted as necessary. Adjust accordingly.

Alternatively, the adhesive may be applied to the base sheet, the granules may be spread on it, and the latex compound may be applied, or the granules may be spread and the latex compound may be applied several times as necessary. It is also possible to fix the particles to the base sheet while coating the surface of the particles by repeating this process several times so that several particles overlap on the surface of the base sheet to form one convex portion.

According to the present invention, when the underlay sheet is interposed between the secondary carpet 8 and the surface to which the particles are attached with the surface facing the primary carpet 6, (1) the convex portions 4 formed by the particles on the surface of the undersheet are: It digs into the pile nap 7 of the primary carpet and produces an anchoring effect.

(2) Since the surface of the convex portion formed by the crushed granules has irregularities, the anchoring effect of the convex portion that is entangled with and entangled with the fibers of the raised pile of the primary carpet is promoted.

(3) The surface of the convex part made of granules is coated with a polymer substance 5 with an extremely high coefficient of friction without any or very little filler, so that each fiber 7 of the pile napped entangled with the surface of the convex part is A close contact is always maintained between them, further promoting the anchoring effect and preventing the underlay sheet from shifting or moving on the primary carpet.

(4) Because the underlay sheet is flexible, it fully adheres to both the surface of the primary carpet and the back side of the secondary carpet, and as it is placed on the undersheet that does not shift in this way, there is no possibility of displacement of the secondary carpet. is effectively prevented.

(5) Since the protrusions of the underlay sheet are composed of rubber particles, even when this is placed on a linoleum floor, etc. and a carpet such as a doormat is placed on it, the protrusions will not damage the linoleum floor and will not damage the protrusion surface. The frictional force of the polymer material coating the carpet also prevents it from shifting.

As is clear from the above, the convex portions of the present invention are not simply protrusions that act as spikes, but have the property of closely intertwining with the pile naps of the primary carpet on their surfaces, and that they are suitable for smooth surfaces such as linoleum floors. The carpet is also characterized by elastic deformation and close contact, which is very convenient in preventing the carpet from shifting.

The underlay sheet according to the present invention can also be used to prevent the cushion from shifting by being placed under a cushion placed on a chair, or it can be used for decorative purposes on the other side that does not have convex portions formed by particles. The present invention is also advantageous in that it can be applied as a seat cover that does not shift, or it can be attached to the back of the carpet using an underlay sheet as a secondary base fabric to obtain a carpet that does not shift. It has practical effects.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of a portion of the underlay sheet of the present invention, FIG. 2 is a sectional view taken at - in FIG. 1, and FIG.
The figure is a sectional view showing a state in which the underlay sheet is interposed between the primary carpet and the secondary carpet. 1...Underlay sheet, 2...Base material sheet, 4...
Particles, 5... Film made of polymeric substance, 6... Primary carpet, 8... Secondary carpet.

Claims (1)

[Scope of Claims] 1. Particles having an uneven surface are coated and fixed on at least one side of a base sheet with a solution of a polymeric substance having soft rubber elasticity without eliminating the unevenness on the surface, An underlay sheet for preventing slippage and movement is formed by forming irregularities due to the particles on the surface of the base sheet. 2. The granules described in claim 1 above are angular and rubbery. 3. The solution of the polymeric substance described in claim 1 above is natural rubber or synthetic rubber latex.