JP2019157101A - Adhesive tape for danger prevention - Google Patents

Abstract

To solve the problems of treatment of a release paper after peeling a conventional adhesive tape having a yellow and black shark pattern for danger prevention, and of poor cushionability, and the problem that a display pattern cannot be seen owing to light reflection by a light under a dark environment.SOLUTION: In order to obtain a wide view range by removing a release paper, keeping high cushionability, and suppressing the light reflection, non-glossy HDPE is used for a base material film 2 used for release agent processing, to increase such effect as seen in various reflectors that a display pattern becomes easy to see, and to thereby contribute to danger prevention.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a multilayer adhesive sheet for preventing injuries for ensuring safety at a construction site or a low ceiling, and particularly relates to an adhesive tape displaying danger prevention that is easy to see even in a dark environment.

  Conventionally, it has been found that yellow and black arrow display tapes are attached to scaffolding pillars and signs at construction sites. Various reflectors have been developed and used for the purpose of improving road traffic safety and safety measures even outside construction sites. There are lens types and prism types when classified, but there are also those that use yellow fluorescent colors to demonstrate their power even when visibility is low such as in the morning or at twilight. These are used and utilized for wearing on the back of bicycles and motorcycles, helmets, and body.

  In large-scale tunnel construction such as linear Shinkansen, it is carried out with a large excavating machine with a normal rotary blade. Therefore, the development of a danger prevention display with good reflection characteristics inside the tunnel by lighting is awaited.

Japanese Patent Laid-Open No. 606-64104 Japanese Patent Laid-Open No. 09-164637

  Conventionally, there are yellow and black arrow mark marks that can be seen at construction sites, but in this case, the marks themselves may not be visible due to light reflection in a dark environment. Furthermore, if you try to dive on the lower support column that is installed next to the construction site, you may be hurt by hitting your head or face. In order to prevent this impact, cushioning has been demanded.

  In addition to these measures, it is convenient to attach an adhesive layer that attaches this sheet to a post or the like. If there is an adhesive layer when the adhesive sheet is rolled up, a release layer is required on the opposite side of the sheet. In general, separate paper is provided as a separate body, but this makes the processing of the separated paper complicated. Sometimes you can step on it and get seriously injured.

The danger prevention adhesive tape of the present invention has a separate layer, a printing layer, a cushion layer, and an adhesive layer, and is made of a heat-laminated multi-layered adhesive sheet. It has cushioning properties, and further reflects light in a dark environment. It is a risk-proof adhesive tape characterized by excellent properties.
In the pressure-sensitive adhesive sheet, a release coated paper is used on the opposite surface of the pressure-sensitive adhesive, but this is removed and a separate and separated release layer 8 is bonded. This eliminates the trouble of peeling the release coated paper.
In a dark environment, when the light hits the sheet by the illumination light, the reflected light hits the mirror surface depending on the viewing angle, and the light is reflected and cannot be visually recognized. In order to eliminate this, reflection is suppressed and a larger visual field range can be obtained. The cushion layer 6 for preventing impact may be a crosslinked or uncrosslinked olefin foam. A printed layer is added to these and heat laminated, and then an adhesive is applied.

    Due to the presence of the separate layer 8, a wide viewing angle can be obtained, and even if it is reflected by the light beam in a dark environment, it can be accurately recognized. This seems to be a phenomenon in which the phenomenon of reflection and refraction is similar to the lens and prism effect seen in various reflectors.

An example in which the visible range is wide due to the presence of a separate layer in the pressure-sensitive adhesive tape comprising the pressure-sensitive adhesive sheet of the present invention is shown. It is a figure which shows the simple measurement of a viewing angle. It is an arrangement plan of each layer of the adhesive tape which consists of an adhesive sheet of the present invention. An example in which the visible range without a separate layer is narrow with an adhesive tape made of a conventional adhesive sheet is shown. It is a figure which shows the simple measurement of a viewing angle.

法線とは、曲面の接線に対し垂直な線。また、セパレート層８は非シリコーン系離型剤を用いた。この結果、入射光がそのまま反射する方法ではセパレート層８の有無に差はないが、法線に対し入射―反射の開き角度１２０°ではセパレート層ありが５％に対し、セパレート層なしは２８％反射する。In the following performance evaluation, gravure printing with a yellow and black diagonal ridge pattern was used. The characteristics of light reflection in a dark environment were tested. The measurement result by the apparatus of the light reflectivity of the separate layer 8 is shown.

The normal is a line perpendicular to the tangent of the curved surface. Separate layer 8 was made of a non-silicone release agent. As a result, in the method in which incident light is reflected as it is, there is no difference in the presence or absence of the separate layer 8. However, when the incident-reflection opening angle is 120 ° with respect to the normal, the separation layer is 5%, but the separation layer is 28%. reflect.

以上の結果から、セパレート層８があることにより視野角度が広く取れ暗い環境下でのライトの光線によって反射されても正確に視認する事が出来る。これは、反射と屈折の現象が各種の反射材に見られるレンズやプリズム効果に類似した現象が生じていると思われる。Simple measurement of viewing angle with and without separate layer for similar samples (Figs. 1 and 3)

From the above results, the presence of the separate layer 8 allows a wide viewing angle and allows accurate viewing even when reflected by the light beam in a dark environment. This seems to be a phenomenon in which the phenomenon of reflection and refraction is similar to the lens and prism effect seen in various reflectors.

This phenomenon is a phenomenon obtained as a result when non-glossy HDPE (High Density Polyethylene) is used as the base film when coating the release agent resin.
When bonding the separate layer 8 and the printing layer, HDPE and printing ink 4 usually use EVA (ethylene vinyl acetate copolymer film) or the like as the adhesive film layer 3, but both VA 5% and VA 8% are good for yellow ink. Black ink does not adhere well. The gravure black ink for surface printing is added with wax and oil to prevent cracks and adhesion, and this cannot increase the adhesive strength. For this, easy peel type CMPS (Mitsui Chemicals Tosero), which is easy to peel off, is preferable.
Good strength is also obtained for black.
Thermal lamination can be used to bond the PE (polyethylene) of the printing substrate 5 and the cushion layer 6 having cushioning properties to the crosslinked or uncrosslinked PE.

  As an effect of this thermal lamination, in addition to the adhesion between the PE of the printing substrate 5 and the crosslinked or uncrosslinked PE of the cushion layer 6, there is also an effect of enhancing the drying of the release agent and exhibiting high performance. Further, the HDPE of the separate layer is difficult to be subjected to double-sided corona treatment at the time of film formation, and the subsequent lamination with the printing ink 4 is difficult to perform dry laminating processing using a normal adhesive, and in this respect, thermal lamination is advantageous.

  Although the release agent processing performance is excellent as described above, this example as a release agent used water-based non-silicone HD-523 (Takamatsu Yushi Co., Ltd.). , Alkyd, acrylic and so on. Non-silicones are generally used because they are generally excellent in coating properties, have no repelling or coating unevenness, and are water-based and do not contain any organic solvent. In addition to these non-silicones, there are silicone-based release agents, which have an excellent release effect, but are difficult to handle because they are easy to set up and need to be cured. These can be used if necessary. This is a pressure-sensitive adhesive sheet for improving safety obtained by manufacturing in this way.

The best combinations of layers and materials of the present invention are shown below. The most important ray reflection is in the release agent processing 1 of the separate layer 8 and the selection of the optimum base film 2.
In order to obtain a wide visual field range, the base film is preferably HDPE having a luster of 20 μm, and other non-glossy ones such as unstretched PET (polyester). This provides a wide viewable range for light in dark environments.

For the reason described above, dry lamination is not suitable for bonding the separate layer 8 and the printing layer 9. For adhesion between the HDPE of the base film of the separate layer 8 and the black printing ink, an easily open, weakly adhesive film is preferable. For example, a specially modified CMPS009 or CMPS011 (Mitsui Chemicals Tosero) 30μ may be used by introducing a functional group into polyolefin in order to be able to adhere to metal, vinyl chloride or styrene. The printing ink may be a normal gravure ink and may be drawn or unstretched PE on the printing substrate, and L-LDPE 20μ.

  The cushion layer 6 may be cross-linked or non-cross-linked foamed PE or foamed styrene, may be 2 to 3 mm foamed 30 times that of the cross-linked PE, and is preferably 3 mm. The past layers are bonded by heat laminating, and an adhesive layer is applied, but this pressure-sensitive adhesive is preferably an acrylic pressure-sensitive adhesive, and rubber and butadiene are inferior in light resistance and other physical properties. . In this way, an optimum material is selected, and a multi-layered adhesive tape is made.

  The pressure-sensitive adhesive tape of the present invention has a wide viewing angle due to the presence of the separate layer 8 and can be accurately visually recognized even when reflected by a light beam in a dark environment. This seems to be a phenomenon in which the phenomenon of reflection and refraction is similar to the lens and prism effect seen in various reflectors. Therefore, when used on a construction site, light reflection is suppressed, the visible range is widened and the eyes are gentle, and industrial applicability is great.

DESCRIPTION OF SYMBOLS 1 Release agent processing 2 Base film 3 Adhesive film layer 4 Printing ink 5 Printing base material 6 Cushion layer 7 Adhesive layer 8 Separate layer 9 Print layer T Adhesive tape

Japanese Patent Laid-Open No. 06-64104 Japanese Patent Laid-Open No. 09-164637

Claims (1)

  Hazard prevention characterized by having a separate layer, printed layer, cushion layer, adhesive layer, and heat-laminated multi-layered adhesive sheet, cushioning, and excellent light reflection characteristics in dark environments Adhesive tape.

Images