JPH0745204B2 - Method for manufacturing foam tubule - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to rugs, blinds, other interior materials, furniture,
The present invention also relates to a method for producing a foamed capillary tube of a fragment that can be used for decorative articles and the like.

<Prior art> As a method of manufacturing a foamed thin tube having a foamed synthetic resin inside and a synthetic resin film layer outside, it has been conventionally used mainly in the manufacture of pipe covers and the like, and foam-molded into a pipe shape. There is a method of forming a synthetic resin skin layer on the surface of the core material by an extruder in the next step. Attempts were also made in the production of fragmented foam tubules that can be used for rugs and blinds targeted for the present invention, or other interior materials, furniture, and other ornaments, for example, in the production of fragmented strips resembling strawberries. I have

<Problems to be Solved by the Invention> However, even though it is said that the conventional manufacturing method imparts a pattern to the surface of the thin tube, it is almost impossible to print on a single thin tube, and the coating resin that forms the skin layer is unavoidable. To make the color uneven, to give a pattern at the time of extrusion molding,
It was far from the appearance of natural products. Further, when the skin layer is other than the heat-meltable resin, coating is difficult, and particularly, it is almost impossible to form the skin layer with paper or the like.

<Means for Solving Problems> The present invention is not limited to the above-mentioned natural materials, and is intended to give a foamed thin tube an artificial or artistic appearance, and the following production is performed. He developed the method.

That is, the manufacturing method is to print a pattern such as strawberry or bamboo on the front side of the base paper such as paper or synthetic resin film and form a synthetic resin layer containing a foaming agent on the back side, and adjust this to the diameter of the foamed thin tube of the product. The tape is then cut into a tape shape, then passed through a deforming jig such as a trumpet mouth to form a tube, and then the synthetic resin is heat-foamed and adhered and integrated with the internal resin, which is cut to a predetermined length. It is what

The base paper such as paper or synthetic resin film has a thickness of 30 to 100
About μ is preferable, and general-purpose materials such as polyethylene, polypropylene, polyvinyl chloride, and nylon can be used as the material of the synthetic resin film. By further subjecting these to surface coating or pressing, the strength, abrasion resistance and surface expression can be made more realistic.

As the pattern printing method, all known methods such as gravure printing and offset printing can be carried out, and not only single color but also multicolor printing is possible.

Further, the foaming agent-blended synthetic resin, in addition to the resin such as polyolefin, polyurethane, acrylic, EVA emulsion, vinyl chloride emulsion-based resin, which can become a foam when heated energy is applied by a heater, a magnetic field or the like in a later step, The foaming agent, cross-linking binder, water-absorbing polymer, ink and the like are optionally blended as necessary.

<Operation> According to such a manufacturing method, it is possible to freely print any pattern on the surface of the base paper such as paper or synthetic resin film, and the tape cut according to the diameter of the foamed thin tube is used as a trumpet mouth or the like. It is deformed into a tubular shape by passing through the deformation jig, and the foaming agent-containing synthetic resin layer formed on the inner surface side by heating in the next step is bonded and integrated while foaming, and the inside is a foam layer and the appearance is a natural material. You can get a thin tube that looks exactly the same.

<Example> An example of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of an apparatus used to carry out the present invention. FIG. 2 is an enlarged front view of the trumpet mouth, and FIG. 3 is a bottom view.

The apparatus shown in FIG. 1 is capable of producing a large number of thin tubes (1) at the same time, so that a wide base paper (2) is supplied from a base paper supply roll (3). The apparatus has a front surface printing apparatus (4) for printing on the surface of the base paper (2) first, and various known printing such as gravure printing is performed here. In this embodiment, gravure printing is performed using a photomechanical process with a wood pattern.

Next, the back surface of the base paper (2) is printed with a strip-shaped foaming agent-containing synthetic resin layer (6) by the back surface printing device (5).
In this example, the synthetic resin containing a foaming agent was composed mainly of a vinyl chloride emulsion, a hydrocarbon microcapsule as a foaming agent, and a polyethylene oxide resin as a water-soluble polymer as a water absorbing agent.

The base paper (2) that has undergone the above steps is cut into a tape shape by a cutter (7) according to the diameter of the foam thin tube (1) of the product. In this case, the cutter (7) has a structure in which a plurality of blades are provided at predetermined intervals in a slit shape, and the interval between the blades, that is, the cutting width of the base paper is the product thin tube (1) diameter x 3.14 + margin. . Since the diameter is usually about 1 to 10 mmφ, the cutting width is about 4 to 35 mm.

The tape-shaped base paper cut into a predetermined width is passed through a deformation jig (8) to form a tubular shape. Deformation jig (8) is tape width 26-33
mm, pipe diameter 8-10 mm, relatively large diameter, Fig. 2 and 3
As shown in the figure, the outlet consisting of the inner plate (12) and the outer plate (13) is a narrow double-tapped mouth, and the base paper tape runs in the slit (14) of the unfoamed synthetic resin layer. It is rolled into a pipe shape with (6) inside. Since the deforming jig (8) used here has a function of rolling a flat object, it can be arbitrarily deformed into various objects such as an ellipse, a semi-cylindrical shape, and a flat shape in addition to the illustrated one. it can. Also, by providing a long feed hole (15) in the inner plate (12) and rubbing in the flow direction of the base paper tape (17) from above the feed hole (15), the base paper tape (17) can be fed smoothly. Can be FIGS. 4 and 5 show a trumpet port used in the case of a small diameter thin tube, for example, a tape width of 7 to 18 mm and a tube diameter of 2 to 5 mmφ.

The base paper tape (17) passes through the deforming jig (8) and is rolled into a tubular form into a continuous thin tube (18), and then passes through a heating device (9) to heat the synthetic resin. Then, the resin is foam-molded while the skin layer and the internal resin are bonded and integrated. A heating device is used here as a heating device, but other means such as dielectric heating by a magnetic field may be used.

The continuous thin tube (18) in which the foam is formed is sent to the cutting device (10) while being cooled by the plurality of rollers (16). The illustrated cutting device (10) includes a roller and a cutting blade (1
Although the structure 1) is provided, other means capable of cutting to a predetermined length can be used. Here, the product is cut to the required length.

<Effects of the Invention> According to the method for producing a foamed thin tube of the present invention as described in detail above, the external appearance is similar to that of a natural material, or exhibits any artificial and artistic appearance, and has a hygroscopic property close to that of a natural material. It is possible to obtain a thin tube having other properties and having a strong inside made of foam resin. In particular, it is extremely useful in that it enables production of a foamed thin tube using a non-thermoplastic non-thermoplastic material such as pulp, a natural material such as pulp, or a high-melting-point resin as a skin, which cannot be melt-molded.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus used to carry out the present invention. FIG. 2 is an enlarged front view of the trumpet mouth, and FIG. 3 is a bottom view. FIG. 4 is an enlarged front view of a trumpet mouth showing another example, and FIG. 5 is a bottom view of the same. (1) ... thin tube, (2) ... base paper (3) ... base paper supply roll, (4) ... front surface printing device (5) ... back surface printing device, (6) ... foaming agent-blended synthetic resin layer (7) …… Cutter, (8) …… Deformation jig (9) …… Heating device, (10) …… Cutting device (11) …… Cutting blade, (17) …… Base paper tape (18) …… Continuous thin tube

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Claims (1)

[Claims] 1. A pattern such as straw grass or bamboo is printed on the front side of a base paper such as paper or synthetic resin film, and a synthetic resin layer containing a foaming agent is formed on the back side thereof, and this is adjusted to the diameter of the foamed thin tube of the product. It is characterized in that it is cut into a tape shape, then passed through a deforming jig such as a trumpet mouth into a tubular shape, and then the synthetic resin is heat-foamed and bonded and integrated by an internal resin, which is cut into a predetermined length. A method for producing a foamed capillary tube.