JPH02128744A - Doormat - Google Patents

Abstract

PURPOSE:To obtain a doormat capable of being used for a long period of time by enhancing the adhesive strength of a mat base with an engaging element by constituting the material quality of the mat base of nitrile/butadiene rubber and forming the base cloth surface on the mount side of the engaging element from a polyamide resin and thermally bonding the mat base and a base cloth through a chlorine-containing resin. CONSTITUTION:A protruding edge 14 is formed to the peripheral edge of the mat base 12 of a doormat 10 and the mat base 16 is received in the protruding edge 14. The mat 12 is constituted of a fabric 18, pile yarns 20 and a backing layer 22 for fixing the pile yarns. An engaging element 24 is mounted on the mat base 12 and constituted of base cloth 26 and hooklike engaging pieces 28, 28 while the base cloth 26 is composed of a polyamide fiber and the engaging pieces 28 are fixed to the base cloth 26. An engaging element 30 is mounted to the rear of the mat 26 by yarns 32. Nitrile/butadiene type rubber is used in the mat base 12 and the mat base 12 1s superposed on the engaging element 24 through a chlorine-containing resin 36 and pressed under heating to be thermally bonded to said element 24 easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a shoe-wiping mat, and more particularly to a shoe-wiping mat that is used in combination with a mat base and a pile yarn mat.

[Prior art]

Recently, rental shoe cleaning mats have become popular mainly at the entrances of stores, offices, etc. In such a shoe-wiping mat, mineral oil is applied to the planted pile yarns, and the pile yarns are provided with a dust-collecting function.

In the rental system, the shoe cleaning mats are delivered to each user store, used at the store, collected, washed,
A system is in place to restore the dust collection function and deliver the product to each user's store again.

Since rental mats like this require frequent transportation work such as delivery and collection, an assembled shoe-wiping mat that can be separated from the mat base and the mat with pile threads planted on it has been developed, and is lightweight. A system has been set up that only requires transporting the mat. A frame-shaped rim is formed on the mat base of this assembled shoe-wiping mat, and the mat is housed and held by this rim so as not to shift. Furthermore, in order to prevent the mat from being easily rubbed by the soles of shoes, etc., or from moving easily when many people come and go, a pair of locking elements, such as a base fabric and a locking piece, are provided between the mat base and the mat. A Velcro fastener is provided. Velcro tape consists of a base fabric on which hook-shaped fibers (locking pieces) are planted and a base fabric on which loop-shaped fibers are planted, and these are respectively joined to the mat base and the mat. The locking element is bonded by thermal bonding, adhesive, etc., and the mat and the locking element are sewn together. Polyamide-based or polyester-based resins are used for the base fabric material and the hook-shaped or loop-shaped fibers.

Further, the mat base is permanently installed at the entrance of the store, and if a dust collection function is required, a treatment liquid such as mineral oil is applied to the mat installed on the mat base during the processing process as necessary. In order to use this method stably for a long period of time, materials with excellent oil resistance, abrasion resistance, dimensional stability, and light resistance are selected. For example, nitrile-butadiene rubber-based materials are excellent in these properties. It is used as a base material because of its excellent processing and economic efficiency.

[Problem that the invention seeks to solve]

However, in such conventional shoe cleaning mats, the adhesion between the mat base and the base fabric of the locking element is surprisingly poor.
Over time or each time the rental system is reused, a problem occurs in which the Velcro tape, which is a locking element, comes off from the mat base.

The present invention has been made in view of these circumstances, and an object of the present invention is to provide a shoe cleaning mat that can be used for a long period of time by increasing the adhesive strength between the mat base and the locking element.

[Means for solving problems]

The present invention includes a mat base on which a picture frame-like protruding edge is formed;
A mat is installed with a pile system coated with an oil agent for dust collection and is removably housed within the frame of the mat base, and a hook-shaped mat is installed between the mat base and the mat. In a shoe-wiping mat, a locking element made of a base fabric in which a locking piece is embedded and a locking element made of a base fabric in which a loop-shaped locking piece is embedded are mounted facing each other on each side. In order to achieve the above object, the material of the mat base is nitrile-butadiene rubber, and the base fabric surface on the attachment side of the locking element to be attached to it is formed of polyamide resin, and the material of the mat base is made of nitrile-butadiene rubber. The present invention provides a shoe cleaning mat characterized in that a base fabric is thermally bonded to a base fabric with a chlorine-containing resin interposed therebetween.

Further, in order to achieve the above object, the material of the mat base is a mixture of nitrile-butadiene rubber and chlorine-containing resin.

[Effect]

In the present invention, by interposing a chlorine-containing resin sheet between the nylon base fabric surface of the locking element and the nitrile butadiene rubber of the matte base and performing thermal bonding, adhesive strength is high, and water and oil resistance are achieved. This is based on the knowledge that it is possible to form a thermally bonded portion with excellent properties.

Generally, when thermal bonding is performed between the locking element and the rubber of the mat base, the base fabric of the locking element does not melt, but thermal bonding is performed under temperature conditions where the rubber sheet melts, because the locking element This is because under conditions where the base fabric melts, the locking piece will fall off with a relatively small force.

When thermally bonding a locking element made of nylon to a matte base made of nitrile butadiene rubber, only a small adhesive strength is obtained, and the thermally bonded part has poor water resistance and oil resistance (comparative examples described below). The reason for this is that the solubility index (SP value) of the cocoon polymers is high and similar, and it is difficult for the two types of coalescence to entangle or interact when the nylon is not melted. I can understand it.

On the other hand, when thermal bonding is performed with a chlorine-containing resin sheet interposed between the nylon base fabric surface of the locking element and the nitrile butadiene rubber of the matte base, the bond strength is more than doubled, and , and the decrease in strength when brought into contact with oil is also significantly suppressed.

The reason for this is unknown, but the compatibility between chlorine-containing resins and nitrile-butadiene rubber is good, and chlorine-containing resins are more resistant to nylons than nitrile-butadiene rubbers (because they form adhesive bonds). it is conceivable that.

[Preferred embodiment of the invention]

Hereinafter, preferred embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 1 is a partial perspective view of a shoe cleaning mat according to the present invention. As shown in FIGS. 1 and 2, the mat base 12 of the shoe cleaning mat 10 is formed in a rectangular shape. The mat base 12 is not limited to a rectangular shape, but may be circular, oval, or the like. A projecting edge 14 is formed on the periphery of the mat base 12, and the projecting edge 1
A mat 16 is housed inside 4. As shown in FIG. 3, the mat 16 includes a woven fabric 18, a pile yarn 20 formed by tufting fibers on the woven fabric 18 and trimming the tips, and fixing the pile yarn 20 to the woven fabric 18. The backing layer 22 is made up of a backing layer 22.

Further, a locking element 24 is attached to the mat base 12 as shown in FIGS. 1 and 2, and the locking element 24 includes a base fabric 26 and a hook-shaped locking piece embedded in the base fabric 26. 28
．． 28,...-. The base cloth 26 is made of polyamide fiber or the like, and the locking piece 28 is fixed to the base cloth 26 by crushing the base.

On the other hand, as shown in FIG. 3, a locking element 30 is attached to the back surface of the mat 16 by a thread 32 facing the locking element 24, and the locking element 30 is fused to the loop-shaped locking piece 34. It is composed of a base cloth 26. These pair of locking elements 24, 30 have a temporary locking function and are commonly known by the name Velcro and are commercially available, for example, under the trade name Velcro fasteners. Incidentally, these pair of locking elements 24
．． 30 can be attached to multiple locations on the mat base 12 and the mat 16.

The Goshiri Hai π mat base 12 is made of nitrile-butadiene rubber, and the nitrile-butadiene rubber has sufficient resistance to outdoor exposure, underwater or hot water, and hot oil, and has excellent dimensional stability.
It also has excellent wear resistance and light resistance. For this reason, nitrile-butadiene rubber is a preferred material when used for long-term permanent installations such as rental mats. In addition, the mat base 12 is made of nitrile-butadiene rubber as a base material.
Vinyl chloride resin or vinylidene chloride resin, which is a chlorine-containing resin, may be mixed.
This is to improve thermal adhesion with No. 4.

The compounding amounts of nitrile-butadiene rubber and these mixtures are:
The nitrile-butadiene rubber is in the range of 90 to 50% by weight, and the vinyl chloride resin or vinylidene chloride resin is in the range of 10 to 50% by weight. More preferably, the amount of nitrile-butadiene rubber and the mixture thereof is in the range of 85 to 60% by weight, and 15% by weight of vinyl chloride resin or vinylidene chloride resin.
The content ranges from 40% by weight.

If the amount of this mixture is greater than the above range, the properties of nitrile-butadiene rubber will be lost, resulting in poor dimensional stability and
Abrasion resistance etc. deteriorate. Furthermore, if the amount of the mixture is small, the effect of thermal adhesion to the locking element 24 will be weakened.

The woven fabric 18 of the pine) 16 may be a general cloth, a plastic net, etc., and in order to fix the pile yarn to the woven fabric, a latex of nitrile-butadiene rubber is coated and dried as a backing layer.

One or two types of bail yarn, cotton fiber, rayon, polyvinyl alcohol fiber, acrylic fiber, nylon fiber, etc.
It may be a spun yarn or a multifilament yarn consisting of a combination of more than one type.

Further, the pile yarn 20 is coated with or impregnated with a dust-adsorbing liquid in order to collect dust adhering to the sole of the shoe through rubbing against the sole of the shoe. As the absorbent liquid, liquid paraffin, spindle oil, alkylbenzene, mineral oil such as castor oil, synthetic oil, vegetable oil, etc.
Examples include aqueous dust adsorbents described in Japanese Patent Nos.-10194 and 53-37471.

The locking piece 28 of the locking element 24 is made of nylon or polypropylene, and is embedded in a nylon fiber or other synthetic thermoplastic fiber. Also,
In some cases, the opposite side is backed with polyurethane resin or the like.

The base fabric 26 of the locking element 24 may thus be composed of nylon fibers and polyurethane resin. As such a polyurethane resin, a polyurethane resin whose terminal isocyanate group is blocked with alcohol, phenol, amine, etc., that is, a heat-sensitive adhesive urethane resin is suitable. Polyurethane resin is a preferable material because the locking piece 28 is planted and fixed in a simple manner. In addition, the locking element 3
The same material as the locking element 24 is also used for the locking element 24.

The mat base 12 and the mat base 12 are overlapped with the locking element 24 via the chlorine-containing resin 36 and easily thermally bonded by pressing under heat with a pair of heat seal bars. The chlorine-containing resin is dissolved in a solvent etc. to form the locking element 24 and the mat base 1.
Alternatively, the chlorine-containing resin may be formed into a sheet and the sheet may be sandwiched and thermally bonded. When formed into a sheet in this manner, the chlorine-containing resin etc. are uniformly interposed between the locking element and the mat base, and a sufficient effect is exhibited. When such a resin or sheet is used, the resin acts as an adhesive, increasing the adhesive strength between the mat base and the locking element, and is particularly resistant to changes over time. Even when immersed in hot water (C) for 7 days, no peeling or falling off of the locking element was observed, which is superior to conventional bonding methods.

The chlorine-containing resins used include vinyl chloride homopolymer or copolymer, vinylidene chloride resin, chlorinated polyethylene, chlorinated polypropylene, chlorinated vinyl chloride resin,
Chloroprene rubber and the like are used, but vinyl chloride resin is most preferred.

It goes without saying that these chlorine-containing resins may be blended with organic tin compounds, heat stabilizers such as natural soaps, plasticizers such as dioctyl phthalate, epoxy plasticizers, etc. according to known formulations.

In addition, these resin sheets have a thickness of 0. A thickness of 1 mm to 2 mm is used, and preferably a thickness of 0.2 mm to IJ is used. If the thickness is too small, sufficient adhesive strength cannot be increased. Moreover, if it is too thick, there is a problem that heat sealing cannot be performed sufficiently.

The heating temperature may be higher than the softening temperature of the polymer constituting the mat base and lower than the melting point or softening point of the base fabric of the locking element, vinyl chloride resin, etc., and the pressure may be set at a temperature that is at least the softening temperature of the polymer constituting the mat base. A pressure is applied to crush or push the pieces, for example, a pressure of 0.1 to 20 kg/cd (gauge). However, pressure is applied mainly to the periphery and a portion of the central portion of the locking element. Note that heating can be performed using a high frequency welder.

Another method is to use the polyurethane resin that is the backing layer of the base fabric of the locking element 24 as a polyurethane adhesive for thermal bonding between the locking element and the matte paste. Such a method involves pre-mixing a blocked isocyanate and a polyester or polyether, each of which is a solid, in a reactive equivalent ratio, and then melting the mixture at a relatively low temperature, e.g., below 95°C, on the back side of the locking element. The locking element to which this mixture has been melt-coated is placed on the mat base surface at a predetermined position so that the coated surface is in contact with the mat base surface, and
Approximately 1 by high frequency heating at a pressure of 0Kg/cd (gauge)
When instantaneously heated to 80 to 185°C, the blocked isocyanate dissociates and instantaneously reacts with the coexisting polyester or polyether to produce polyurethane, which is firmly bonded to vinyl chloride etc. and has a strong adhesive effect. can be expressed.

According to the method of the present invention, a locking element to the mat base surface whose back surface is coated with block isocyanate and polyester polyol is brought into close contact with a predetermined position of a vinyl chloride resin sheet at a pressure of 2 kg/d gauge. If heated to 185°C for 5 seconds with high frequency heating while crimping,
The locking element was fully bonded and exhibited a peel strength of over 20 kg.

To apply blocked isocyanate/polyester or polyether to the back surface of the locking element, instead of melt application, it is also possible to dissolve it in a solvent such as ethers (tetrahydrofuran), ketones (methyl ethyl ketone), etc., and evaporate the solvent after application. The effect of this can be obtained. Addition of cobalt octenoate is effective for promoting thermal dissociation of blocked isocyanate and subsequent reaction.

In addition, block isocyanates include 4゜4゛-
Block body of diisocyanate diphenylmethane and xylenol (Coronate@MS50 manufactured by Nippon Polyurethane Industries Co., Ltd.), the same <4,4°-diisocyanate
Blocks of diphenylmethane with methyl ethyl ketone oxime or adducts of trimethylolpropane/tolylene diisocyanate with 2,4-dichlorophenol can be used effectively. In particular, blocks with methyl ethyl ketone oxime release phenol when dissociated by high temperature heating. It is suitable because it has the characteristic that it does not generate any foreign odor such as.

The active hydrogen compound to be reacted with the blocked isocyanate may be either polyester or polyether, but solid polymers having a relatively low melting point are advantageous; for example, as polyesters, Bayer's De
sa+ophen 650, polycaprolactone Placcel from Daicel Chemical Industries, Ltd., and niraporan [phase] from Nippon Boriurekun Industries Co., Ltd. can be effectively used, and as polyethers, WysndoLte Ch
Pluronic polyols from Em, Corp. with a melting point of 50° C. are advantageous.

〔Example〕

Examples of the present invention will be described in detail below.

(Example 1) Stopper fi matte base; nitrile-butadiene rubber 70% by weight/
100 parts of 30% by weight vinyl chloride, 6 parts of SRF carbon
0 parts, hard clay 50 parts, DOP 35 parts, zinc oxide 5 parts, stearic acid 1 part, 2,6-ditetrabutylvalacresol 2 parts, paraffin 1 part, accelerator N
-Produced by blending 2 parts of cyclohexyl-2-benzothiazylsulfenamide, 2 parts of promoter tetramethylthiuram disulfide, and 0.5 part of sulfur.

Locking element: Polyurethane resin is used for the backing layer of the locking element.

Intervening sheet: Use a vinyl chloride sheet with a thickness of 0.3~.

6. Putting the vinyl chloride sheets in between and thermally bonding them using a high frequency welder, the conditions were 210V, 0.7A for near seconds; tuning adjustment6. l: Gauge pressure was set to 4 kg/cJ.

Autograph IM-10 was immersed in air, water, and spindle oil for 7 days in an atmosphere with a temperature of 20°C and 60°C.
0 (manufactured by Shimadzu Corporation) 90 degree peeling (peel speed;
200mm/mm,) test was conducted. The results are shown in Table 1 below.

As a result, in a severe test at a temperature of 60°C, the locking element did not peel off easily and had sufficient adhesive strength.

Table 1 N-10, (Unit: kg/medium) (Example 2) Shiripu π Mat base: Nitriloop Kudiene rubber 851i crush%
/ 100 parts of vinyl chloride 15% by weight, and the other formulations were the same as in Example 1.

゛Locking element: Polyurethane resin is used for the backing layer of the locking element.

Intervening sheet; thickness 0.5! Uses vinyl chloride sheet.

After that, the vinyl chloride sheet was sandwiched and thermally bonded using a high-frequency welder under conditions of 210V and 0.7A.

7 seconds; tuning adjustment 6.1; gauge pressure 4 kg/cul.

A mat base with 10 locking elements glued to it was immersed in air, water, and spindle oil for 7 days in an atmosphere with a pressure temperature of 20″C and 60°C, and the Autograph IM-10
90 degree peeling (peel speed;
200mm/mm,) test was conducted.

The results are shown in Table 2 below.

As a result, in a severe test at a temperature of 60°C, the locking element did not peel off easily and had sufficient adhesive strength.

Table 2 N-10, (Unit: kg/kg>) (Comparative Example 1) Rei Nagi! Mat base: 100 parts of nitrile-butadiene rubber,
The other ingredients were manufactured in the same manner as in Example 1.

Locking element: Polyurethane resin is used for the backing layer of the locking element.

Intervening sheet: None.

Thermal bonding was performed using a Juku W Katomo high-frequency welder, and the conditions were 210V and 0.
7Ai 7 seconds; synchronization adjustment 6. l; Gauge pressure 4 kg/e
It was set to 1m.

A mat base with 10 locking elements glued to it was immersed in air, water, and spindle oil for 7 days in an atmosphere with a pressure plate standing temperature of 20°C and 60°C, and the Autograph IM-10
0 (manufactured by Shimabara Seisakusho) 90 degree peeling (peeling speed:
200mm/mm,) test was conducted.

The results are shown in Table 3 below.

As a result, the strength in the standard state was low, and in a severe test at a temperature of 60°C, the locking element was easily peeled off and did not have sufficient adhesive strength.

Table 3 N=10. (Unit: kg/S') (Comparative Example 2) Mat base; Nitrile-butadiene rubber 80% by weight/
It was manufactured using 100 parts of 20x4% vinyl chloride and the other ingredients in the same formulation as in Example 1.

Locking element: Polyurethane resin is used for the backing layer of the locking element.

No intervention.

Thermal bonding was carried out using a high-frequency welder, and the conditions were 210V and 0.
7A, 7 seconds; tuning adjustment 6. l; Gauge pressure 4 kg/c
+j.

In an atmosphere with depressurization temperatures of 20°C and 60°C, ■air, ■water,
■ Soak the mat base with 10 locking elements glued on each in spindle oil for 7 days, and use Autograph IM-100.
(manufactured by Shimabara Seisakusho) 90 degree peeling <Peeling speed H2O
0mm/mim,) test was conducted.

The results are shown in Table 4 below.

Sufficient strength was obtained in the standard state, but the strength decreased significantly when immersed in water, and the strength decreased significantly when immersed in water and oil under severe conditions at a temperature of 60°C.

Table 4 N-10, (Unit: kg/i') [Effects of the Invention] As explained above, according to the shoe cleaning mat of the present invention, the locking element adhered to the mat base is more effective than the conventional one. It has excellent adhesive strength in terms of water resistance, oil resistance, etc., and can maintain sufficient adhesive strength in terms of durability even when used as a mat base for rental mats for a long period of time.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view of a shoe cleaning mat according to the present invention, FIG. 2 is a cross-sectional view of the mat base in FIG. 1 taken along line A-A, and FIG. 3 is a B-B of the mat in FIG. It is a sectional view along the line. 10... shoe cleaning mat, 12- mat base,
14... ridge, 16... mat, 20-...
...Pile thread, 24.30--Locking element, 26--
...Base fabric, 28...Hook-shaped locking piece, 34-
Loop-shaped locking piece, 36... Chlorine-containing resin. Figure 1 Patent applicant Duskin A Co., Ltd.

Claims (3)

[Claims] (1) a mat base having a picture frame-like protrusion formed thereon; and a mat having pile threads coated with a dust-collecting oil agent and removably housed within the picture frame of the mat base;
A locking element made of a base fabric in which a hook-shaped locking piece is implanted, and a locking element made of a base fabric in which a loop-shaped locking piece is implanted, between the mat base and the mat. In the shoe-wiping mat in which the mat base is made of nitrile-butadiene rubber, and the base fabric surface on the side where the locking element is attached is made of polyamide-based material. A shoe cleaning mat, characterized in that it is formed of a resin, and the mat base and the fabric surface are thermally bonded with a chlorine-containing resin interposed therebetween. (2) The shoe cleaning mat according to claim 1, wherein the material of the mat base is a mixture of nitrile-butadiene rubber and chlorine-containing resin. (3) The shoe cleaning mat according to claim 2, characterized in that the mat base contains 90 to 50% by weight of the nitrile-butadiene rubber and 10 to 50% by weight of the chlorine-containing resin.