JPH0545473Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a raw fabric used as a cushioning sheet material for packaging or packaging.

(Prior Art and Problems) Conventionally, this type of cushioning sheet material is made of a foamed sheet of soft synthetic resin, or an air bubble with a diameter of 10 to 15 mm and a height of about 5 mm between two sheets, commonly called an air bag. A buffer sheet is used in which cushioning sheets are arranged at a pitch of 30 to 40 mm in the length and width directions of the film strip.

However, since these known cushioning sheet materials are already foamed or filled with air, they are very bulky to store and transport, and these costs push up the cost.

Furthermore, an air sheet that can be used as a cushioning material for machinery is known from Japanese Utility Model Application Publication No. 55-510 and its microfilm.

(Problem that the invention aims to solve) This invention is a material for cushioning material that does not take up bulk during storage or transportation, and can be made into air mat-like bags by simple processing prior to use. Our goal is to provide the market with products that satisfy these requirements.

(Means for Solving the Problems) In this invention, both side edges of two air-impermeable synthetic resin film strips are welded to each other so that a continuous seal is formed. Discontinuous seal portions are formed distributed over the entire width of the two film bands, and a gap is formed between the two film bands to allow air to be blown;
The original fabric for cushioning material is a half-folded original fabric with one side edge being a folded edge, and the half-folded original fabric is further wound into a roll.

(How to use this device) This original film is stored or transported as it is, ie, with no air inserted between the front and back films, rolled into a roll.

When used as a cushioning material, the material is folded in half and then welded and cut or welded and cut in the transverse direction at a predetermined pitch to form a bag with both sides heat-sealed, and the item to be packaged is inserted into this bag. After sealing, a suitable air syringe needle is injected into the air-blowing gaps on the front and back panels, the packaging bag is inflated with air, and the insertion opening is affixed with an air-tight label or the area is sealed. Use by heat welding and sealing.

When used as a raw material for a packaging device, the folded object to be packaged is inserted between half-folded films, the periphery of the packaging bag is completely sealed, and then air is blown into the air-blowing gap to inflate it.

In the case where air inlets with annular valves are attached to the original fabric at predetermined intervals, at least one air inlet with annular valves should be formed when welding and cutting or welding and cutting this in the transverse direction. Process it so that it can be placed in a bag.

(Effect) By doing this, when storing and transporting the original fabric of this invention, when supplying it to a packaging machine or a bag-making machine as a packaging fabric, it is possible to use conventional packaging materials such as a conventional semi-folded folding band. It can be handled in the same way as an obi and is not bulky at all.

Therefore, once the bag is processed, air is blown between the two films only after or before inserting the packaged item, preferably after the packaged item is placed in the bag and the opening of the bag is completely sealed. By injecting air into the possible gap, these peripheries are closed by continuous heat-sealed parts, and discontinuous heat-sealed parts are distributed in the middle part, so the two films become air mat-like and the inside of the film is closed. This has the effect of sufficiently protecting the packaged item.

It is particularly effective for packaging printed circuit boards (printed circuit boards) on which electronic component elements are mounted.

Embodiment 1 The air-impermeable synthetic resin film bands 10 and 11 are overlapped, and both side edges 12a, 12b are connected to continuous heat-sealed parts 13a, 12b, as shown in FIG.
13b, and discontinuous heat-sealed portions 14 are distributed at relatively coarse pitches (e.g., 2 cm to 10 cm intervals) in the intermediate portion of the film strips 10 and 11. In the normal state, the two film bands 10 and 11 are
A gap 15 through which air can be inserted is formed so that the entire surface is in contact with the material, and the material is further folded in the longitudinal direction, folded in half, and rolled into a roll to form the original fabric A for cushioning material.

Example 2 Example 2 uses the same original fabric A for cushioning material as in Example 1.
An air inlet 17 with an annular valve 16 formed of a film is provided at a predetermined pitch P in the continuous heat seal 13a or 13b on one side,
The air insertion port 17 communicates with the outside air and the air insertion gap 15.

Even if the air insertion opening 17 does not protrude from the side edge 12a of the original fabric A for cushioning material as shown in FIG.
Even if it is made to protrude from the side edge 12a, there is no difference in this invention.

Example 3 Same structure as Example 1, except that the inner film was made of a conductive film.

Example 4 Same structure as Example 1 or 2, except that the film surface facing the air-blowable gap was previously subjected to anti-blocking treatment by corona discharge, and the rest was the same as Example 1. It is a structure.

Example 5 In Examples 1 and 2, the inner film 11 was made of a conductive film, and the other structures were the same as those in Examples 1 and 2.

(See Figure 4).

(How to use and effects of the example) In Example 1, the original fabric is welded and melted across the entire width at intervals of 30 to 50 cm, for example, to form seals on both sides, depending on the size of the item to be packaged. The bags are made into side-seal type bags with 19, and the items to be packaged B are sequentially charged into these bags, and air is injected into the air-blowable gap 15, which is a double bag without sealing or not sealing the opening of the bag. This is inflated to form an air mat-like bag, and both sides of the packaged object B are protected thereby.

In the second embodiment, so that at least one air inlet 17 with an annular valve 16 is provided, the original fabric between adjacent air inlets 17 is welded and cut in the transverse direction, and the air inlets 17 are attached. A side-seal type bag was used in the same manner as in Example 1.

In this embodiment, air can be blown in through the air inlet 17, and since this inlet 17 is equipped with an annular valve 16, the air once blown in does not leak out.

In Example 4, in addition to having the same method of use and effect as in Examples 1 and 2, the contact surface of the film constituting the original film was treated to prevent blocking by corona discharge, so that air could be removed. When inflating, it is easy to insert the inflation needle.

In Example 5, since no static electricity is charged, it is most suitable for packaging electronic devices, mounting boards on which electronic devices are mounted, and printed boards.

The pitch and size of the above-mentioned discontinuous welded portions 14 are appropriately selected depending on the size and shape of the packaged item. For packaging the above-mentioned mounting boards and printed circuit boards, a 2 cm pitch or thinner one of about 0.5 cm is used, and for packaging paintings, etc., a larger pitch is preferable.

In addition, the shape of the discontinuous welded portion 14 is not limited to that shown in the drawings, and may be any shape such as linear or wavy, and even a combination of several types is the same for this invention.

[Brief explanation of the drawing]

The drawings show typical embodiments of this invention, with Figure 1 being a perspective view and Figure 2 a and b.
3 is a plan view of the original fabric with an air inlet, FIG. 3 is a sectional view including the air inlet, FIG. 4 is a sectional view of the original fabric before it is folded into two, and FIG. FIG. 3 is a cross-sectional view of a state in which air is injected. Main symbols in the figure, 12a, 12b...both side edges,
14...Discontinuous heat sealing part, 16...Acyclic valve.

Claims (1)

[Claims for Utility Model Registration] 1) Both side edges of two air-impermeable synthetic resin film bands are continuous, and the two film bands are welded to each other to form a continuous sealing part. A discontinuous seal portion is formed distributed over the entire width of the film strip, a gap is formed between the two film strips to allow air to be blown, and one side edge is a folded edge. An original fabric for cushioning material, which is a folded original fabric, and the half-folded original fabric is further wound into a roll. 2) A utility model registration claim characterized in that one of the continuous seal portions is provided with annular valves made of film that penetrate from the outside into the air blowable gap at a predetermined pitch in the length direction of the film band. Original fabric for cushioning material according to scope 1. 3) The original fabric for cushioning material according to claim 1, wherein at least one of the mating surfaces of the two film strips is treated to prevent blocking. 4) The original fabric for a cushioning material according to claim 1, wherein the anti-blocking processed surface is a fine satin surface.