JPS61209130A - Manufacture of single layer single side adherent stretch film for pallet stretch packaging - Google Patents

Abstract

PURPOSE:To manage with a single extruder or the like and eliminate the need for a laminating device by a method wherein a single layer single side adherent stretch film, the one side of which is roughened or made non-adherent and the other side of which is mirror-finished or made adherent, is manufactured. CONSTITUTION:Molten film extruded from a mold 4 is past between a roll 1, the peripheral surface of which is mirror-smooth, and a roll 2, the peripheral surface of which is roughened, so as to be cooled and solidified while being past through the rolls, resulting in obtaining a single layer single side adherent stretch film 5, the one side of which is roughened and consequently non-adherent and the other side of which is mirror-smooth and consequently adherent. In this case, the roughening of the peripheral surface of the roll with roughened surface may be done by making fine irregularities by directly turning the peripheral surface of said roll or by winding fine metal gauze with about 120 mesh or pasting paper such as kraft paper or the like onto the peripheral surface of said roll.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for producing a single-layer, single-sided adhesive stretch film for pallet stretch packaging.

"Prior Art" In recent years, so-called pallet stretch packaging, in which cargo, etc., is wrapped around a film and packaged in an integrated manner has come into widespread use. The stretch films used for these pallet stretch wrappings are a sticky film that has elasticity within the elastic limit and a sticky film, and the former film has elasticity within the elastic limit. There is a film that is similar to , but has no adhesive properties. Therefore, such adhesive stretch films and non-adhesive stretch films each have their advantages and disadvantages, and recently they have become intermediate products between the two, with one side being adhesive and the other side being adhesive. So-called single-sided adhesive stretch films without adhesive are increasingly being used.

The characteristics of such a single-sided adhesive stretch film are: ■ One side is non-adhesive, so it does not slip easily, so even if the films rub against each other, it is difficult to tear. ■ One side is adhesive, so the films stick together well. Because of this, the film can be packed into small pieces after unpacking, making it easy to handle, and even if the film breaks, it will not unravel into pieces. It is only necessary to fold the film back inside the bundled film, and fixing with heat sealing, adhesive tape, etc. is not necessary.

Such a single-sided adhesive stretch film is produced by making the film constituting one side of the adhesive side using EV resin, rubber resin, or linear low-density polyethylene (linear low-density polyethylene) added with an adhesive. In addition, the film constituting the opposite non-adhesive side is manufactured from linear low-density polyethylene, etc., and these adhesive films and non-adhesive films are laminated together.
It has a two-layer structure or a three-layer structure with an intermediate layer interposed. Therefore, since such conventional single-sided adhesive stretch films have a structure in which two or three films are stretched together, it takes two
It requires a series of extruders or three extruders to extrude through a mold, or a laminating device for laminating the films together, which requires a lot of cost and effort.

"Problems to be Solved by the Invention" The present invention has been made in view of the above points, and consists of a single layer with one side roughened and non-adhesive, and one side mirrored and adhesive. By producing a single-sided adhesive stretch film, only one extruder is required, and traditional laminating equipment is no longer required, significantly reducing the cost and labor required for production. It is something.

"Means for Solving the Problems" The present invention involves passing a molten film between a pair of rolls having a mirror-like peripheral surface and a roll having a rough peripheral surface,
By cooling and solidifying the film while passing through the rolls, this is a method for producing a single-layer, single-sided adhesive stretch film, which has one surface that is rough and non-adhesive and the other surface that is mirror-like and adhesive.

Here, as a means for roughening the circumferential surface of a roll having a roughened circumferential surface, the circumferential surface of the roll may be directly scraped to form fine irregularities, or the circumferential surface of the roll may be roughened by 120 mm. You can also wrap paper such as kraft paper or paper wrapped in wire mesh with a mesh size. In addition, silicone rubber and the like can also be used.

Next, the present invention will be specifically explained with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a molten film 3 extruded from a mold 4 passes between a roll 1 with a mirror-like surface and a roll 2 with a roughened surface. During the passage, the film is cooled and solidified, thereby obtaining a single-layer, single-sided adhesive stretch film 5t, which has a rough, non-adhesive surface on one side and an adhesive, mirror-like surface on the other.

FIG. 2 is a partially enlarged cross-sectional view of a single-layer, single-sided adhesive stretch film 50 manufactured according to the present invention.One side 5a is mirror-like and one side 5b is rough. Therefore, a mirror-like surface is extremely sticky, and a rough surface is rough, slippery, and has no stickiness.

"Effects of the Invention" According to the present invention, it is possible to extremely easily produce a single-layer, single-sided adhesive stretch film having one surface that is rough and non-adhesive and one surface that is mirror-like and adhesive. Furthermore, since the single-sided adhesive stretch film produced by the present invention is composed of one sheet, less equipment may be required for production compared to conventional single-sided adhesive stretch films with a two-layer or three-layer structure. The time and effort required for bonding can also be saved. Furthermore, relatively inexpensive materials such as linear low-density polyethylene resin (linear low-density polyethylene) can be used as raw materials for the film, making it economical.

[Brief explanation of the drawing]

FIG. 1 is a detailed explanatory diagram of the present invention, and FIG. 2 is a partially enlarged sectional view of a single-layer inter-piece adhesive stretch film produced according to the present invention. 1... Roll with mirror surface 2...
Roll 3 with a roughened peripheral surface... Melted film 4... Mold 5... Single layer single-sided adhesive stretch film.

Claims (1)

[Claims] The molten film is passed between a pair of rolls with a mirror surface and a roll with a rough surface, and is cooled and solidified while passing through the rolls. A method for producing a single-layer, single-sided adhesive stretch film for pallet stretch packaging, characterized by producing a single-sided adhesive stretch film that is non-adhesive, has a mirror-like surface on one side, and is adhesive.