JPS63303723A - Manufacture of foamed fine pipe - Google Patents

Abstract

PURPOSE:To make an external appearance just like a natural material by printing all sorts of patterns, by a method wherein a pattern is printed on a surface side of base paper, a foamed compounded synthetic resin layer is formed on the rear side of the base paper, which is cut off into a tape-like state, turned into a tubular state by passing the same through a deforming jig and then the same is unified through heating, foaming and adhesion. CONSTITUTION:Base paper 2 is fed through a base paper feed roll 3. A device possesses a surface printing device 4 to print the surface of the base paper 2 in the first place and printing of a linear foamed compounded synthetic resin layer 6 is performed by a rear side printing device 5. Then the same is cut off into a tape-like state in accordance with the diameter of a foamed fine pipe 1 by a cutter 7 and made into a tubular state by passing through a deforming jig 8. A base paper tape 17 passes through a heating device 9 after it has become a continuous fine pipe 18 by passing through the deforming jig 8 and molded through foaming while sticking and integrating a skin layer and inner resin. The continuous fine pipe 18 within which a foam has been formed is sent to a cutting device 10 by a plurality of rollers 16 while the same is being cooled.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to rugs, blinds, other interior materials, furniture,
The present invention relates to a method for producing fragmented foamed capillary tubes that can be used for decorative accessories and the like.

<Conventional technology> As a manufacturing method for foamed thin tubes that have a foamed synthetic resin inside and a synthetic resin membrane layer on the outside, foam molding into a pipe shape has traditionally been used mainly in the manufacturing of pipe covers, etc. There is a method in which a synthetic resin skin layer is coated on the surface of the core material using an extruder in the next step. Attempts have also been made to produce foamed tubules in the form of fragments that can be used, for example in the production of fragments resembling rush grass.

<Problems to be solved by the invention> However, even though the conventional manufacturing method imparts a pattern to the surface of the tube, it is almost impossible to print on a single tube, and the coating resin that forms the skin layer has no choice but to print. This creates uneven color and imparts a pattern during extrusion molding. The appearance was far from that of a natural product. Also, if the skin layer is made of something other than a thermofusible resin, coating is also required,
In particular, it was almost impossible to form the skin layer using paper or the like.

Means for Solving the Problems> The present invention aims to give not only the above-mentioned natural materials but also all kinds of artificial and artistic appearances to foamed tubules. He developed a method.

In other words, the manufacturing method is to print a pattern such as straw grass or bamboo on the front side of a base paper such as paper or synthetic resin film, and to form a foaming agent-containing synthetic resin layer on the back side, which is then adjusted to the diameter of the foamed capillary of the product. The synthetic resin is then cut into a tape shape, passed through a deforming jig such as a wrapper to form a tube, and then the synthetic resin is heated and foamed to bond and integrate with the internal resin, and then cut into a predetermined length. That is.

The thickness of base paper such as paper or synthetic resin film is 3θ~I
QQμa degree is preferable, synthesis 4! ! As the material for the fat film, general-purpose materials such as polyethylene, polypropylene, polyvinyl chloride, nylon, etc. can be used. By further applying surface coating or press processing to these materials, strength, wear resistance, and surface appearance can be made more realistic.

All known methods such as gravure printing and offset printing can be used to print the pattern, and not only monochrome printing but also multicolor printing is possible.

In addition, foaming agent-containing synthetic resins are those that can become foamed when heating energy is applied by a heater, magnetic field, etc. in a later process, such as polyolefin, polyurethane, acrylic, EVA emulsion, vinyl chloride emulsion resin, etc. , its foaming agent, cross-linked binder, water-absorbing polymer, ink, etc. are optionally blended as necessary.

According to this manufacturing method, any pattern can be freely printed on the surface of the base paper such as paper or synthetic resin film, and the tape cut to match the diameter of the foam tube is attached to the wrapper opening. It is transformed into a tubular shape by passing through a deformation jig such as the above, and the foaming agent-containing synthetic resin layer formed on the inner surface is foamed and bonded together by heating in the first step, and the interior is a foam layer with a natural appearance. A thin tube that looks exactly like the material etc. can be obtained.

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

FIG. 1 is a perspective view of the apparatus used to practice the 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 makes it possible to simultaneously manufacture a large number of thin tubes (1), and for this purpose, a wide base paper (
The device in which 2) is composed of a base paper supply roll (3) is a surface printing bag W for first printing on the surface of the base paper (2).
E(4), in which various known types of printing such as gravure printing are performed. In this embodiment, gravure printing using woodgrain pattern photolithography is performed.

Next, on the back side of the base paper (2), a streaky foaming agent-containing synthetic resin layer (6) is printed on the back side! [0 made by (5)
In this example, the foaming agent-containing synthetic resin was mainly a vinyl chloride emulsion, with hydrocarbon microcapsules as the foaming agent and polyethylene oxide resin, which is a water-soluble polymer, as the water absorbing agent.

The base paper (2) that has gone through the above steps is used as a product in foamed capillaries (
1) Cut into a tape shape using a cutter (7) according to the diameter. In this case, the cutter (7) has a structure in which a plurality of blades are provided in the form of slits at predetermined intervals, and the interval between the blades, that is, the cutting width of the base paper is determined.

Diameter of product thin tube (1)
It is about 351.

The tape-shaped base paper cut to a predetermined width is passed through a deforming jig (8) to form a tube. The deformation jig (8) has a tape width of 26 mm.
~33m, for relatively large pipe diameters of 8-10cm.

The inner plate (12) and outer plate (12) as shown in Figures 2 and 3
The base paper tape is rolled into a pipe shape by running through the slit (14) with the unfoamed synthetic resin layer (6) inside. This is because the deforming jig (8) used here has the function of rounding a flat object.

In addition to the shapes shown in the drawings, it is also possible to arbitrarily transform the shape into various shapes such as an ellipse, a semicircular shape, and a flattened shape.
A slotted feed hole (15) is provided in the inner plate (12), and by rubbing in the flow direction of the base paper tape (17) from above the feed hole (15), the feeding of the RIA tape (17) is made smooth. be able to. FIGS. 4 and 5 show a trumpet opening used for a small diameter thin tube, for example, a tape width of 7 to 1 B+m and a tube diameter of 2 to 5 Imφ.

After the base paper tape (17) passes through a deformation jig (8) and is rolled into a tubular shape to become a continuous RIA tube (18), it passes through a heating device (9) to heat the synthetic resin. Then, the skin layer and internal resin are bonded and integrated with the resin, and foam molding is performed. Although a thermal heater is used as the heating device here, other means such as dielectric heating using a magnetic field can also be used.

The continuous thin tube (18) with the foam formed inside is cooled by a plurality of rollers (16) and then cut into a cutting device (10).
The cutting equipment shown in 0 is sent to! (10) has a structure in which the roller is provided with a cutting blade (]l), but other means capable of cutting into a predetermined length may also be used.

Here, it is cut to the required length to make the product.

<Effects of the Invention> According to the method for producing a foamed capillary of the present invention as detailed above, the appearance is exactly like that of natural materials or any kind of artificial and artistic appearance, and the hygroscopicity is close to that of natural materials. It is possible to obtain stiff tubules whose interior is made of foam resin and has other properties. In particular, it is extremely useful in that it enables the production of foamed thin tubes using natural materials such as paper and pulp that are not thermoplastic, which cannot be melt-molded, or high melting point resins for the skin.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the apparatus used to practice the 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 the trumpet mouth showing another example, and FIG. 5 is a bottom view of the same. (1) Thin tube (2) [Paper (3), Jjf
1 Paper supply roll (4) Front side printing device (5) Back side printing device (6) Foaming agent blended synthetic resin layer (7) Cutter
(8) Deformation jig (9) Heating device (1
0) Cutting device (11) Cutting blade (17) Base paper tape (18) Continuous thin tube or more

Claims (1)

[Claims] 1 Print a pattern of grass, bamboo, etc. on the front side of base paper such as paper or synthetic resin film, form a foaming agent-containing synthetic resin layer on the back side, and cut this into a tape shape according to the diameter of the foamed tube of the product. Then, after passing through a deformation jig such as a trumpet spout to form a tube, the synthetic resin is heated and foamed to be bonded and integrated with an internal resin, and this is cut into a predetermined length. Production method.