JPH0357985B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the provision of molded mats, tatami mats, etc., which have both good abrasion resistance and texture characteristics, and have an appearance color similar to that of natural rush, reed, or bamboo.

Therefore, these kinds of mats, tatami mats, bamboo screens, etc. are generally made by weaving or weaving strawberries, reeds, or bamboo bamboo as appropriate, adding natural texture and taste to living spaces. It also provides a unique texture and a surface that reflects sunlight.

However, when using such natural grasses, reeds, or bamboo, they tend to age and decay over time, and due to their low abrasion resistance during use, they tend to wear out and crack. , causing rot etc.
Its durability is extremely poor. However, due to the recent shortage of materials, the shortage of weaving and weaving engineers, and the soaring labor costs, it has become increasingly difficult to make silk robes made from natural materials. The production costs of tatami mats, tatami mats, and bamboo screens have come to be considered relatively high.

The method for forming rugs, tatami mats, etc. according to the present invention was specially devised in view of the inconveniences in the conventional methods, and the method for forming rugs, tatami mats, etc. It is a mixed resin material, and on the one hand, it aims to improve wear resistance, corrosion resistance, water resistance, etc., and at the same time, on the other hand, it has appropriate hygroscopicity, appropriate contact resistance, and wood-like texture. The aim is to provide high-quality rugs, tatami mats, bamboo screens, etc. at low cost.

In the present invention, in order to achieve specific effects on such characteristics, the gist of the structure is particularly focused on grasses such as grasses, reeds,
A bamboo-shaped extruded product is formed by mixing 100 to 150 meshes of cellulose-based fine powder aggregate at 20 to 70°/wt, and the extruded product is placed at a point where it is knitted or woven, The following specific examples accompanying this and considerable other molding methods associated with these examples are planned.

An embodiment of a typical molding method for mulberry mats, tatami mats, bamboo screens, etc. according to the present invention will be described below with reference to the drawings. 1 is a thin rod made of resin having the appearance and color tone of natural strawberry, reed, or bamboo. Atsute, thick thread,
It is woven or knitted with rope or other suitable strings 2 in the form of a matte, tatami mat or screen, and is usually molded by extrusion of a resin material mixed with a pigment or the like.

The thin rods 1 thus provided are prepared so as to have the same appearance color tone, texture, and shape as natural materials, and are designed to match the color tone of each strawberry, reed, or Shinotake. In addition to coloring and creating gloss, it was also separately planned to color or add luster or shape with paint or the like afterwards.

Therefore, in the thin rods 1 that are knitted or woven, 100 to 150 meshes of extremely fine powdered cellulose aggregate, especially wood powder, is added to the
It is mixed and molded in the range of 700°/wt, and the mixed volume is appropriately determined according to the desired wear resistance properties and water absorption properties.

In addition, when mixing this wood powder, molding by appropriate means such as injection molding, calendar roll molding, or extrusion molding, the amount of aggregate mixed in, the difference in the characteristics of the aggregate, and the shape of the narrow rods to be molded. They are selected and used after comprehensive consideration of thickness, width, etc.

Next, the aggregate powder to be mixed has a particle size of 100 to 150 in order to improve compatibility with the molding resin material and to improve slipperiness during molding.
In order to make the eggplant into an ultra-fine powder that will be made into a mesh, and to prevent the generation of bubbles and roughening of the surface during molding, the moisture content is kept within the air-dry moisture content, ideally within 3 to 50°/wt. It is limited to.

When such aggregate powder is mixed, the molding resin material powder and the aggregate powder should be sufficiently compatible with each other, without forming cavities or bubbles on the surrounding surface of the aggregate powder during molding, and with little surface roughness. Furthermore, the extrusion resistance or rolling resistance on the roll surface during molding is reduced, making it possible to provide a narrow rod with relatively good surface properties.

Furthermore, in cases where it is necessary to improve the molding properties and mixing conditions of such aggregate powder, the aggregate powder itself can be molded using the following method.

That is, first, crushed chips, pulp, rice husks, and other appropriate cellulose-based materials are dried to below the air-dried moisture content, and by lowering the moisture content as much as possible, the destruction of the fibrous tissue portion is induced, A urea-based resin solution is applied and impregnated on the tissue area where such a state of destruction has occurred, and left for 20 to 30 minutes to ensure sufficient infiltration and drying of the resin solution. During impregnation, the pH of the material is usually set to about 5, and the heating, drying and crushing treatments harden the resin and dry it to a temperature of 3 to 5 degrees/wt.
The particles are crushed into fine particles with a size of 120 to 150 mesh, and the pH value is approximately 6 to 7, which is neutral.

When using the aggregate powder thus provided, it is said to have better compatibility with resin materials than the aggregate powder described above, and is also said to have good lubricity during molding, and it is said that it is difficult to use acetic acid gas during hot molding. This prevents the generation of harmful gases such as

In other words, the fibers of the powder itself are hardened by the hardened resin material, and the surface sliding properties are said to be particularly good, so it is said that the powder mixes perfectly with the resin material, and the mixed aggregate There are no voids or nests on the powder surface, and there is little frictional resistance against the molding machine cylinder surface and die hole surface.
Molding is done smoothly and reliably, and wear and tear on these cylinder surfaces is minimized.
Furthermore, roughness on the surface of the molded narrow rod is ensured by imparting such slipping properties and suppressing the generation of water vapor and wood acid gas.

In particular, the generation of wood acid gas caused the problem of roughness on the surface of such narrow rods, as well as oxidative corrosion of the equipment itself such as the molding machine cylinder and die.
Effective prevention of such wood acid gas makes it possible to form thin rod materials by the various methods described above.

The narrow rod 1 according to the present invention has a unique structure as described above, in particular, it has an aggregate 1a of 20 to 700°/wt, so it brings the following characteristics to the molded log a etc. of the present invention. It is something.

(1) The abrasion resistance is said to be extremely good compared to natural strawberry, bamboo, or reed, and even after long-term use, surface wear and deterioration of the molded locust a, etc. is effectively prevented.

In other words, the amount of wear in this case (PVC rod) is 35.9/the amount of wear in normal PVC rods is 46.6 (however, the load is 1 kg, the rotation speed is 70 rpm, and the worn wheel cs−
(mg/1000 revolutions in 17calibrase) (2) As the water absorption is within the range of appropriate moisture as shown below, it absorbs sweat from the contact surface and has a good texture. In particular, it eliminates the sticky feeling in the summer, and also eliminates the dry touch feeling in the winter. In addition, this moderate water absorption function effectively prevents the tatami material or tatami flooring material located on the underside of the molded mats that are laid down from getting wet, especially from rotting due to wetting caused by condensation.
This provides a comfortable dry and moist living space.

In other words, the water absorption rate of this case (PVC rod) is 0.44/the water absorption rate of ordinary PVC rod is 0.09 (however, at 25℃ according to the JIS K7209 water absorption test method,
(Water absorption rate per unit area for 24 hours) (3) The mixed aggregate has good heat insulation and sound insulation efficiency, and it has a much better heat insulation and sound insulation function than ordinary bamboo logs, tatami mats, or screens. The exposed aggregate 1a provides a warm feel to the touch.

(4) Due to the presence of the mixed aggregate 1a, there is little shrinkage distortion in the narrow rods 1 during and after forming, there is no shrinkage or expansion due to thermal changes, and there is no change in softening or hardening. Since the degree of damage is suppressed as much as possible, it is guaranteed to fit accurately on the laying surface and maintain its shape, and also effectively prevents sagging, twisting, and tearing during use.

(5) In the narrow rod 1, since the aggregate 1a is exposed on the surface, appropriate contact resistance is brought to the contact surface such as the skin surface, ensuring a comfortable walking sensation and texture. At the same time, it effectively prevents the tatami mats, straw mats, bamboo screens, etc., from slipping out.

(5) Since there is aggregate 1a exposed on the surface of narrow rods 1, it is said that the adhesion or adhesion effect based on aggregate 1a is good, and the paint or adhesive has good glue and good coloring or adhesion. It was made possible to match.

(7) In Hosorod 1, the appropriate hardness, wood-like texture, and rich color tone are provided by Aggregate 1a, and the use of common natural straw grass, reeds, and Shinotake. It promises usage characteristics similar to those of mackerel, tatami, or chest of drawers.

(8) Since the aggregate 1a is exposed on the surface of the narrow rods 1, reflected sunlight is buffered, giving the molded product a soft color tone.

By making the narrow rod 1 described above a foam molded product, the various functions of the narrow rod 1 described above can be achieved even more effectively.

The molding of mats, tatami mats, and screens according to the present invention has the characteristic structure described above, and is suitable for mass production, making it possible to provide these products at low prices.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a product according to the present invention, FIG. 2 is a perspective view of a narrow rod 1, and FIG. 3 is a sectional view thereof. In the figure, 1 shows a thin rod, 1a shows an aggregate, and 2 shows a string.

Claims (1)

[Claims] 1. An extruded product shaped like rush, reed, or bamboo,
150 mesh of cellulose fine aggregate at 20~70°/
1. A method for molding tatami mats, tatami mats, etc., characterized in that wt is mixed therein and molded, and the extruded product is knitted or woven. 2. A method for forming a tatami mat, tatami mat, etc. according to claim 1, characterized in that the moisture content in the aggregate is 5°/wt or less.