JP2893419B2 - Cork sheet and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a cork sheet material used for a shoe insole mat or the like, in which ground cork particles are integrally joined to the surface of a sheet-like base material, and the same. It relates to a manufacturing method.

(Prior Art) Conventionally, as a shoe insole mat, a material obtained by sewing a cloth, a material obtained by cutting felt or leather, and the like are often used.

However, these materials are smooth and slippery on the surface, and because they adhere to the soles of the feet, they tend to be moist and stuffy, and those made of leather are particularly sticky and may cause athlete's foot.

(Problems to be Solved by the Invention) The present invention has been made in view of the above points, and uses a cork which is rich in elasticity and flexibility, has a soft touch, and is resistant to water, and has large irregularities formed by grinding particles. An object of the present invention is to provide a cork sheet-shaped article which is not slippery by forming a part and has a breathability, so that it is not stuffy due to moisture and heat, and has an acupressure effect, and a method for producing the same.

(Means for Solving the Problems) In the present invention, cork particles are provided on uneven surfaces of a sheet-like base material having a cushioning property such as a thick-plate-like nonwoven fabric or cardboard, and the cork-particles are scattered. A first object of the present invention is to provide a cork sheet-like material characterized in that its side is cut into the base material and integrally joined.

Further, in the present invention, after applying an adhesive to the surface of a sheet-like base material having a cushioning property such as a thick-plate-like nonwoven fabric or cardboard, cork particles are sprayed from above to form an uneven portion, and then the spraying is performed. A method for manufacturing a cork sheet-like article, comprising spraying an adhesive from above the cork particles, hot pressing at a high temperature and a high pressure to bite the lower side of the cork particles into the base material and joining them together. As a second gist.

(Operation) Hereinafter, the method of the present invention will be described with reference to the drawings. After crushing scrap pieces of cork wood with a crusher, this can be sorted into wind tunnels,
The sieving screen is used to sort large and small average particle sizes.

For example, cork particles having a small average particle diameter of 0.5 mm or less are used, and cork particles having a large average particle diameter of about 3 to 7 mm are used.

In this case, if the average particle size of the large cork particles is less than 3 mm, a large uneven portion cannot be obtained, and the effect is small because it becomes smooth like a sliced foil of cork, and if it exceeds 7 mm, friction and impact may occur. The above-mentioned range is desirable because it is easy to peel off.

The thus obtained cork particles having a large particle diameter are square, brittle, and easily broken. For this reason, if pressure is applied to the cork particles 1 in advance and then rubbed, impurities such as skin and sand on the surface are separated, the corners are rounded off as shown in FIG. 1, and the fibers are irregular. Bends to improve elasticity and flexibility.

Thereafter, as shown in FIG. 2, the cork particles 1 having a large particle diameter are introduced into the hopper 2 in the former stage, and the cork particles 1 having a small particle diameter are introduced into the hopper 3 in the subsequent stage.

In this state, a sheet-like base material 4 having a cushioning property, such as a thick nonwoven fabric or cardboard, is continuously run, and an adhesive 5 is applied to the surface of the base material 4 with a roller 6.

Thereafter, the surface of the base material 4 to which the adhesive 5 has been applied is
The cork particles 1 having a large particle diameter are scattered from the hopper 2 at the former stage and adhered. Next, cork particles 1 having a small particle diameter are sprayed from a hopper 3 at a later stage, and the cork particles 1 having a large particle diameter are buried in the gaps between the cork particles 1 and 1 to be bonded to each other.
Allow to dry.

After the adhesive 5 is dried and the cork particles 1 are bonded to the base material 4, in the next step, a heat-fusible adhesive 5 is spray-sprayed from above the cork particles 1 from a nozzle 7 as shown in FIG. The cork particles 1 and 1 are joined to each other with an adhesive 5.

In this state, as shown in an enlarged manner in FIG. 4, the adhesive 5 adheres to the surface of the cork particles in a spot-like manner.

Thereafter, the base material 4 to which the cork particles 1 are bonded is set on a press machine 9 having a heater 8. In this case, a cushioning material 10 such as a plywood is laid on the bed 11 and the base material 4 is placed on the bed 11 with the cork particles 1 facing downward.

Next, while heating at 110 to 150 ° C. with a press machine 9, 6 to 12
A cork sheet 12 shown in FIG. 6 can be obtained by applying a pressure of Kg / cm ² for 30 to 50 seconds and hot pressing.

As a result of the hot pressing, the cork particles 1 bonded to the surface are crushed and heated for several tens of seconds while being pressed into the base material 4 having cushioning properties. 4 and are integrally joined by a heat-fusible adhesive 5, and the cork particles 1 and 1 are firmly joined together.

It should be noted that in this case, heat press to a small pressure in the pressure is less than 6 Kg / cm ² is less biting into the base material 4 of cork particles 1, there is a risk of delamination during use, also 12 Kg / cm ²
When a large pressure exceeding is applied, the cork particles 1 penetrate into the base material 4 greatly, forming a shallow concave-convex portion 14 to form a flat plate, and the effect is reduced, so that the above range is preferable.

Thereafter, when the pressure is released and the press machine 9 is removed from the press machine 9, the crushed cork particles 1 return by elasticity to form an uneven portion 14 on the surface as shown in FIG. The cork sheet 12 is integrally joined in a state of being cut into the sheet.

The cork sheet 12 obtained in this manner is further coated with a surface resin by spraying urethane resin or the like from above the cork particles 1 as necessary, and applying an adhesive 5
And the surface can be made glossy to improve durability.

(Example) Hereinafter, an example of the present invention will be described.

After crushing the scrap pieces of cork material with a crusher, rubbing while applying pressure to separate the surface skin and impurities such as sand, and then sieving this to particles with a particle size of 0.5 mm or less,
Sort into particles with a particle size of 3-5 mm.

Next, as shown in FIG. 2, a base material 4 obtained by pressing a non-woven fabric of polyester fiber to a thickness of 2.0 mm is continuously run, and an adhesive 5 of a polyurethane resin is applied to the surface of the base material by a roller 6.

Thereafter, the surface of the base material 4 to which the adhesive 5 has been applied is
After the cork particles 1 having a large particle diameter are scattered from the hopper 2 at the former stage and adhered thereto, the cork particles 1 having a small particle diameter are scattered from the hopper 3 at the subsequent stage, and the gap between the cork particles 1 having the large particle diameter is spread. After embedding and bonding, the adhesive 5 is dried.

Next, the polyurethane resin adhesive 5 is spray-sprayed from above the cork particles 1 from the nozzle 7.

After that, a press machine 9 equipped with a heater 8
The base material 4 cut to 2 m and having the cork particles 1 bonded thereto is set on the cushion material 10.

Next, a pressure of 150 tons (8.5 kg / cm ² ) was applied for 40 seconds while heating at 130 ° C. with a press machine 9, and hot pressed to form a cork sheet 12.

The cork sheet 12 obtained in this way is
As shown in the figure, the shoe was cut out into a footprint to form a shoe insole mat 13.

The insole mat 13 is firmly joined because the lower side of the cork particles 1 joined to the surface bites into the base material 4 and is integrally joined, so that the cork particles 1 can be prevented from peeling even by friction or bending. it can.

Also, the cork particles 1 are formed by joining a large particle and a fine particle to form the uneven portion 14, so that the soles of the feet do not adhere to each other so that a gap is formed, and the cork itself has moisture permeability. Since there is a respiratory action that absorbs and disperses, the inside of the shoe is not stuffy due to moisture or hot air, and athlete's foot can be prevented.

The cork particles 1 on the surface are rubbed and pliable for easy walking, and because of their high heat insulating effect, they can be warm even in winter if laid on the inner bottom of boots. Further, since the uneven portions 14 are formed, the soles of the feet are moderately stimulated, and there is an acupressure effect so that fatigue can be reduced.

Since the cork particles 1 have water resistance, when they are soiled, they can be washed with water.

(Effect of the Invention) As described above, according to the cork sheet and the method of manufacturing the same according to the present invention, cork having high elasticity and flexibility, soft touch, and strong against water is used and pulverized. It is possible to form large irregularities with a small amount of particles, so it has good air permeability, there is a humidity control effect due to the breathing action of natural materials, and it has an acupressure effect, and it also has excellent heat insulation, so it has an insole mat and shoes It can be widely used as an inner bottom material.

[Brief description of the drawings]

1 to 6 sequentially show the steps of manufacturing a cork sheet according to the present invention. FIG. 1 is a perspective view of a kneaded cork particle, and FIG. FIG. 3 is an explanatory view showing a state in which an adhesive is sprayed from above the cork particles, FIG. 4 is a side view of a base material to which the cork particles are adhered, FIG. FIG. 5 is a front view showing a state of hot pressing, and FIG.
The figure is a side view of a sheet made of cork, and FIG. 7 is a perspective view of an insole mat formed of the sheet made of cork. DESCRIPTION OF SYMBOLS 1 ... Cork particle, 2, 3 ... Hopper 4 ... Base material, 5 ... Adhesive 6 ... Roller, 7 ... Nozzle 8 ... Heater, 9 ... Press machine 10 ... Cushion material, 11 ... Bed 12 ... Cork sheet material 13 … Insole mat, 14… Unevenness

Claims (2)

(57) [Claims] 1. A corrugated particle provided on a surface of a sheet-like base material having a cushioning property such as a thick-plate-like nonwoven fabric or a cardboard with irregularities, and the lower side of the cork particle is cut into the base material to form an integral part. A cork-shaped sheet, characterized by being bonded to a sheet. 2. An adhesive is applied to the surface of a sheet-like base material having a cushioning property such as a thick plate-like nonwoven fabric or cardboard, and cork particles are scattered from above to form an uneven portion,
Next, after spraying an adhesive onto the dispersed cork particles, the cork sheet is characterized by being hot-pressed at a high temperature and a high pressure to cut the lower side of the cork particles into the base material and to integrally join the cork particles. Manufacturing method.