JPS5813325B2 - Method for manufacturing printed thermoplastic synthetic resin packing band - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a printed thermoplastic synthetic resin packing band.

Conventionally, this type of band has been manufactured by directly printing on a smooth band, and after printing, the band is passed between uneven rollers to be embossed or textured to prevent vertical cracking.

However, with this method, some of the printing ink would peel off or become thinner due to friction during the transportation process from printing to texturing and during the texturing process.

Furthermore, when used as a packing band, the area where the ink was peeled off due to friction was large, and the printed area was thin and blurred.

The object of the present invention is to provide a method for manufacturing a packing band made of thermoplastic synthetic resin that prevents such peeling of printing ink, and the object of the present invention is to provide a packing band made of thermoplastic synthetic resin having a flat surface. First, the pitch on the rotating surface is 1/
Pressure is applied with a pair of rollers having a large number of small unevenness of 50 to 1 mm to form small unevenness, secondly, the band is printed, and thirdly, the pitch of the band is the same as that of the first roller. The unevenness is formed by a pair of rollers having unevenness of 1 to 3 mm, which is slightly smaller than the unevenness.

Next, an embodiment of the present invention will be described with reference to the drawings. Figure 1 shows the process of the present invention, in which the band sent out from the supply section 1 is first textured by the first stage texture roller 2, and then printed. It is printed by a machine 8, passed through a dryer 4, and then embossed by a second stage embossed roller 5.
Wind it up.

Since a well-known technique is used until the band is supplied, illustrations are omitted, but to give an overview, first a band-shaped thermoplastic synthetic resin is formed using an extrusion molding machine, and then it is passed through a cooling device such as a cold water tank. The water is then drained and the material is transferred to a primary take-up device consisting of multiple rollers.

Next, after passing through a heating device, the band A is formed by stretching approximately 5 to 7 times with a stretching roller of a secondary drawing device.

The band A thus formed is sent out from the supply section 1.

The first stage grain roller 2 is a pair of rollers on which small irregularities with a fine pitch P of 1/50 to 1 are engraved.The shape of the small irregularities may be regular or irregular. , Fig. 2 a'' to e are suitable for manufacturing rollers and equalizing the strength of the band.

In particular, type a is strong in tensile force, and type b is excellent in preventing vertical cracking.

Note that the first stage texturing may be further divided into multiple stages.

Next, printing is performed using conventional printing machines and other printing techniques.

When printing, care is taken to ensure that ink is sufficiently attached to the small recesses formed by the first grain roller 2.

After drying this ink by natural drying or artificial drying, graining is performed using a second stage graining roller 5.

The pitch of the unevenness of the second stage grain roller 5 is preferably larger than that of the first stage, and is preferably 1 to 3 mm.

It is preferable to form the irregularities as shown in FIG. 3 in order to prevent vertical cracks caused by the orientation of micelle molecules that occur in this type of band.

As described above, according to the present invention, since the flat surface of the band is first embossed with a fine grain size of 1/50 to 1 mm before printing, the printing ink firmly adheres to the small recesses formed by this embossment. However, since the ink in the small convex portions has a small pitch between concave and convex portions, a tensile force due to viscosity acts between the ink in the small concave portions, so even if friction occurs in the small convex portions, the risk of peeling is small and the second grain is The ink does not peel off during the transportation process up to the application process and the second texturing process.

Because the band is subjected to double texturing: fine texturing before printing and final texturing after printing, the molecular composition of the band, which is aligned in the length direction due to stretching, is completely disturbed.

Therefore, it is possible to prevent the band from cracking in the longitudinal direction.

Since the embossment is performed in a double manner in this way, sawtooth-like irregularities do not occur on both longitudinal edges of the band.

In addition, small concave portions 8 and small convex portions 9 obtained in the first texturing step are left in the convex portion 7 obtained in the second texturing step shown in FIG. Therefore, even if the convex portion 7 in the second texturing process is rubbed, the ink does not peel off, and the peeling of the printing ink due to the use of the band has almost disappeared.

Furthermore, according to the method of the present invention, a band with a completely different feeling from conventional ones was obtained, and the band was durable in terms of appearance.

[Brief explanation of the drawing]

Figure 1 is a manufacturing process diagram, Figures 2 a to e are surface views of the band obtained by the first graining, Figure 3 is a perspective view of the band obtained by the second graining, and Figure 4 is the band. FIG. 1... Supply unit, 2... First stage grain roller, 3... Printing machine, 4... Dryer,
5...Second stage grain roller, 6...Take-up roll.

Claims (1)

[Claims] 1. After forming irregularities on a stretched thermoplastic synthetic resin packing band with a flat surface using a pair of rollers having a large number of small irregularities on the rotating surface, printing is applied to the band, and then the band is A method for producing a printed thermoplastic synthetic resin packing band, characterized in that the unevenness is formed by a pair of rollers having unevenness that is slightly more dog-like than the unevenness of the roller.