JPH0738189Y2 - Cushioning material - Google Patents

Description

[Detailed description of the device]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cushioning material manufactured from a plastic film and having a continuous hollow tetrahedron shape.

[Prior art]

As a cushioning material with a continuous hollow plastic body, especially as a cushioning material for packaging, an "air cap",
What is called a "bubble cap" is widely used. However, since the air cap requires a large-scale equipment for manufacturing and enormous equipment cost, it is the current situation that a specialized manufacturer produces it and transports it to the customer. The transportation of bulky products is disadvantageous because it leads to high costs. Also, depending on the shape of the packaged object, a large space is created between the container and the container, and it is necessary to stack multiple sheets to fill this space with sheet-shaped cushioning materials, which further increases the cost. . Therefore, the reporter can solve the above problems, have a high buffering capacity to absorb the energy of vibrations and vibrations during transportation, can be manufactured with simple equipment, and can therefore be produced at or near a demand place. We have proposed a cheap cushioning material that can reduce the burden of transportation costs, reduce costs, and easily fill a large space that may occur depending on the shape of the packaged product (Practical application 61-44560). issue).

[Problems to be solved by the device]

It is an object of the present invention to improve the above-mentioned cushioning material, to provide a cushioning material which not only has a satisfactory function and is low in cost but also has a beautiful appearance.

[Means for Solving the Problems]

The cushioning material of the present invention is formed by heat-sealing both ends and the middle of a cylindrical body (2) of a plastic film having an inner surface having a heat-sealing property, and adjacent heat-sealing portions (3, 4).
In the cushioning material having a hollow tetrahedron in a continuous shape, the plastic film having the heat-sealable inner surface is formed by extruding the heat-sealable plastic on the tough plastic film by providing the two in a direction orthogonal to each other. A laminated body formed by coating, wherein a film (6) is provided on the inner surface of the hollow body by using a film having a pattern of irregularities corresponding to the irregularities carved on the surface of the cooling roll during extrusion coating. It is characterized by that. To produce the tubular body of plastic film (2),
The heat-sealing part (5) may be formed by sticking a long laminate of the above-mentioned laminate. Suitable tough plastic films are biaxially stretched films of polyethylene terephthalate, polyamide, polypropylene, polystyrene and ethylene-vinyl alcohol copolymers. The heat-sealable plastic film includes low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer. A film obtained from an ionomer and an ethylene-α-olefin copolymer can be preferably used. Considering the strength and weight of the film, the thickness of the plastic film is preferably in the range of 20 to 40 μ as a laminate. In order to obtain a sufficiently high strength as a buffer material, it is preferable to use a plastic film having the following physical properties. Transverse direction Longitudinal direction Tensile strength (Kg / 15mm width) 3.5 or more 3.0 or more Elongation rate (%) 100 or more 140 or more Heat sealing strength (Kg / 15mm width) 3.5 or more 3.0 or more (heat sealing condition: temperature 140 ° C, pressure 1Kg / Cm ² , time 1 second) You can choose any pattern such as letters, figures and various patterns. FIG. 2 shows a method of forming a pattern on the inner surface of the above-mentioned laminated body. That is, extrusion coating is performed by stacking a heat-sealing plastic extruded from a T-die (8) on a tough plastic film (11) prepared in advance, and at that time, engraving a desired pattern of projections and depressions on the surface. Using the cooling roll (9),
An uneven pattern corresponding to the above pattern is formed on a heat-sealable plastic film (12).

[Action]

The cushioning material of the present invention has a beautiful appearance by providing pictures such as letters, figures and patterns on the inner surface of the hollow body. Since this pattern is on the inner surface of the hollow body, it does not disappear by being rubbed.

【Example】

Copper is plated to a thickness of 150μ on a steel roll with a diameter of 500mm, a pattern in which katakana is randomly arranged on the roll surface is printed by the direct method (plate depth 63μ, width 12μ), and chromium is further applied to the surface. Was plated to a thickness of 50 μm, and then the surface was processed by sandblast to prepare a cooling roll. With an extrusion coater equipped with the above roll,
Thickness of surface treated with isocyanate-based anchor coating agent
Linear low density polyethylene "C-249-4" (manufactured by Mitsui Petrochemical Co., Ltd.) on a 12μ biaxially stretched polyethylene terephthalate film "Emblet PTM" (manufactured by Unitika) at a processing temperature of 290 ° C and a thickness of 20μ. Coated. The plastic film thus obtained was slit to a width of 190 mm and wound up. Using this rolled-up plastic film, a heat seal width of 5 mm pasting the palm, a heat seal width of 5 mm in the transverse direction
By heat-sealing under the conditions described above, a cushioning material having a continuous hollow tetrahedron was manufactured. The obtained cushioning material had a beautiful appearance and exhibited a good cushioning capacity.

[Effect of device]

The cushioning material of the present invention has a beautiful appearance. Since the pattern provided on the cushioning material can be arbitrarily selected, not only the design but also the trademark can be attached. This pattern can be formed in a concavo-convex pattern on the surface of the heat-sealable plastic when a heat-sealable plastic film is manufactured by extrusion coating, and does not need to be printed. This cushioning material has a high cushioning ability to absorb the energy of vibrations and vibrations and is inexpensive as in the past.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of the cushioning material of the present invention. FIG. 2 is a conceptual diagram showing an example of a method of manufacturing a laminated film used as a material for the cushioning material of the present invention. 1 ... Laminated film 11 ... Tough plastic film 12 ... Heat-sealing plastic film 2 ... Plastic film tubular body 3,4,5 ... Heat-sealing part 6 ... Picture 8 ... T-die 9 ...... Cooling roll

Claims (1)

[Scope of utility model registration request] 1. A plastic film tubular body (2) having an inner surface having a heat-sealing property, wherein both ends and a middle portion of the tubular body are heat-sealed, and adjacent heat-sealing portions (3, 4) are provided in directions orthogonal to each other. Thus, in a cushioning material having a hollow tetrahedron in a continuous shape, as a plastic film having an inner surface having heat sealability, a laminate obtained by extrusion coating heat-sealable plastic on a tough plastic film is a laminate. hand,
A cushioning material characterized in that a pattern (6) is provided on the inner surface of a hollow body by using a film having a pattern of irregularities corresponding to the irregularities carved on the surface of a cooling roll during extrusion coating.