JP3975447B2 - Air-filled filling material - Google Patents

Description

  The present invention can be used as a cushioning material by packing it in a gap between the packaging container and the baggage or between the packages in order to prevent damage to the baggage during transportation, or packed in a gap between shoes, bags, etc. before sale. The present invention relates to a so-called packing material, and more particularly to a plastic filling material used by filling the inside with air.

  Conventionally, a plastic cushion or a shape-retaining filling or a laminated plastic film that has been completely sealed so as not to leak air inside is adhered to the periphery of the laminated plastic film and the plastic film is attached to a supply / exhaust port provided in a part of the periphery. There is known a variety of buffer fillings for transport goods in which a separate check valve is attached, air is supplied between the stacks from the supply / discharge port with the check valve, and the air is filled.

No. 8-4281

  According to the above conventional precedent, it is difficult to transport a large amount of filling at a time because it is transported in a full state to a site that requires filling, for example, a merchandise shipping station or a product sales office. Yes, it is difficult to adjust the amount of internal air and it cannot be reused after air leaks.

  According to the conventional example, a check valve is required, and this check valve must be attached to the main body, which takes time for manufacturing work.

  An object of the present invention is to obtain a cushioning material and a shape-retaining material that have solved the drawbacks of the conventional examples.

  According to a first aspect of the present invention, in a plastic film sealed bag having an air supply / exhaust port, an inward projection is formed by adhering the vicinity of the supply / exhaust port, and the supply / exhaust port is formed in the inward projection. It is characterized by forming a supply / discharge path communicating with the vehicle.

  According to a second means of the present invention, a front film made of a plastic film and a back film having the same shape and the same size as the front film are overlapped, and the peripheral edge leaving a part of the peripheral edge of the front and back film is thermally bonded. Thus, a thermally bonded portion and a remaining portion are formed, the remaining portion is used as a supply / discharge port, and a pair of inwardly projecting portions are thermally bonded and extended from both ends of the heat bonding forming the supply / discharge port, The supply / exhaust path formed between the inwardly projecting portions is communicated with the supply / exhaust port.

  The third means of the present invention is characterized in that the communication hole composed of the supply / discharge port and the supply / discharge passage is straight.

  The fourth means of the present invention is characterized in that the communication hole composed of the supply / exhaust port and the supply / exhaust passage has a funnel shape having a smaller diameter as it approaches the inner end.

  The fifth means of the present invention is characterized in that the inward projecting portion extends horizontally or substantially horizontally from the inner end corner portion by thermal bonding, and then obliquely outwards, and the terminal end is connected to the thermal bonding portion. Is.

  According to the first means of the present invention, a check valve is not required, and it can be manufactured inexpensively, easily and quickly, and when the air is filled in the sealed bag, the inner end of the inward projecting portion Concentration of stress due to internal pressure occurs at the corner, and it is pulled in the horizontal direction, the inner end of the supply / discharge path and the inner end of the inward protruding part are bent upward or downward, the internal air is difficult to leak, and the filling is It can function as a cushioning filling or a shape-retaining filling, and it is sufficient to transfer the film in a flat film state without introducing air to the site where the filling is required, and large-scale transfer is possible.

  According to the means of claim 2 of the present invention, in addition to the effect of claim 1, it can be manufactured very easily.

  According to the means of claim 3 of the present invention, in addition to the effect of claim 1 or 2, it can be manufactured more easily.

  According to the means of claim 4 of the present invention, in addition to the effect of claim 1 or claim 2, the internal air is extremely difficult to leak out.

  According to the means of claim 5 of the present invention, in addition to the effects of the invention of claim 1 or claim 2, the strength of the inwardly protruding portion itself is increased.

  A pair of front and back thermoplastic films 5 and 6 having the same size and shape (rectangular in this embodiment), specifically ONY (stretched nylon), PET (polyethylene terephthalate) or OPP as shown in FIG. Laminate comprising base materials 5a, 6a made of (stretched polypropylene) and sealant substrates 5b, 6b made of LLDPE (linear low density polyethylene), LDPE (low density polyethylene) or EVA (ethylene vinyl acetate). The four sides of the film are matched and overlapped, and a part of the remaining portion 10, specifically, a peripheral edge other than the central remaining portion of the upper long side is thermally bonded (thermal bonding portion 2 b) to have an air supply / exhaust port 1. The sealed bag 2 is formed. Each of the thermoplastic films 5 and 6 is composed of two layers as described above, but is represented as a single body in FIGS. Each thermoplastic film 5, 6 may be a single body.

  The remaining portion 10 is non-bonded, and this remaining portion 10 is used as the supply / discharge port 1. As shown in FIG. 2, the supply / discharge port 1 is straightly formed by heat bonding both ends 2a and 2a parallel to the short direction of the plastic film 5 (6), and each inner end of each heat bonding end 2a is heat bonded. Thus, the inward projecting portion 3 is formed, and a gap formed by the inward projecting portions 3 and 3 facing each other is defined as a supply / exhaust passage 4, and the supply / exhaust passage 4 and the supply / exhaust port 1 communicate with each other.

  The communication hole 14 including the supply / discharge port 1 and the supply / discharge path 4 is formed in a small diameter, that is, a funnel shape, as it approaches the inner end from the open end. In the embodiment of FIG. 2, the supply / exhaust port 1 is straightened, and the diameter is reduced in an arc shape from the base end 3c of the inward projecting portions 3 and 3 continuous to the inner end corner portion 3a.

  The inner end corner portions 3a of the inward projecting portions 3 and 3 are extended by thermal bonding to the left and right and substantially horizontally, and further extended by thermal bonding obliquely outward, and each end 3b is connected to the thermal bonding portion 2b. To be connected to

  Next, the usage and operation of the above embodiment will be described. When the non-adhesive portion 10 that is in contact is separated as shown by the phantom lines in FIGS. It enters into the airtight bag 2 from the supply / discharge passage 4, and eventually the airtight bag 2 is inflated and enters the filling state shown in FIG.

  When the air injection is stopped, the supply / discharge path 4 is closed by the air pressure in the airtight bag 2. Specifically, a stress concentration phenomenon occurs in the inner end corner portions 3a and 3a of the inward projecting portions 3 and 3 shown in FIG. As shown in FIG. 6 by the dotted line and FIG. 5, the horizontal or substantially horizontal portion 3d and the inner end 4a of the supply / discharge path 4 are bent in the vertical direction, and the supply / discharge path 4 is closed. Therefore, despite having the supply / discharge path, there is very little air leakage.

  In fact, the filling material of the present invention composed of the above-described material and the above-described structure has a longitudinal side of 350 mm, a lateral side of 450 mm, a thermal bonding portion 2b, a width diameter of 10 mm of the inward protruding portion 3, a diameter of the communication hole 14 of 15 mm, and a total thickness of 80 μm. When the airtight bag 2 was prototyped and filled with air to be inflated, the horizontal or substantially horizontal portion 3d and the inner end 4a of the supply / discharge port 4 were bent and closed as described above.

  If the communication hole 14 is separated with a fingertip or a straw is inserted, the air is immediately discharged.

  In addition, although several improvements were made before reaching the above-described configuration, as shown in FIG. 7, at first, when the inward projecting portions 3 and 3 were made parallel and the communication hole 14 was made a straight hole, It was confirmed that the inner end corners 3a and 3a were pulled in the horizontal direction by the internal pressure, and the same end and the inner end 4a of the supply / exhaust port 4 were bent and it was difficult for air to escape.

  Next, (B) the oblique outward portion 3e is formed to reinforce the inward projecting portion 3, and then (C) the communication hole 14 is formed in a linear funnel shape, the closing force due to the concentration of stress increases. , It is visually confirmed that the air does not leak more, and finally the best mode for carrying out the above-described embodiment is obtained, and the above-described actions and effects are produced. In addition, as shown in FIG. 7D, it was recognized that the horizontal or substantially horizontal portion 3d was not formed, and that the air supply / discharge became smooth even if it was extended obliquely outward 3d 'from the inner end corner 3a. .

  Further, when the inner end corners 3a are formed at right angles, substantially right angles, and acute angles as in the best mode for carrying out the embodiment and the examples (A) to (D), the closing force is large, and the two-dot chain line in FIG. It has been recognized that the closing force is smaller than that in each of the above-described embodiments in the case of R.

  Claims 1 to 4 of the present invention are not limited to the supply / exhaust port and supply / exhaust path of the above-described embodiment, and include, for example, the forms (A), (B), (C), and (D). Of course.

  If it is desired to seal completely after filling with air, it is only necessary to thermally bond only the supply / exhaust port 1, the operation can be made very quickly and easily, and the sealing bag 2 is limited to the shape and size. Of course, for example, in the case of shape retention for shoes, bags, etc., the desired shape and size may be used.

It is a top view of the present invention. It is a partial enlarged plan view which shows the principal part of this invention. It is XX sectional drawing. It is a partial expansion explanatory view of a front film and a back film. It is a perspective view which shows the state which filled the filling of this invention with air. It is a YY expanded sectional view. It is explanatory drawing which shows other embodiment of this invention.

Explanation of symbols

1-supply / discharge port 2-sealed bag 2a-thermal bonding end portion 2b-thermal bonding portion 3-inward projecting portion 3a-inner end corner portion 3b-termination 4-feed / discharge route 5-front film 6-back film 10-remaining Part 14-Communication hole

Claims (1)

  A front film made of a plastic film and a back film having the same shape and the same dimensions as the front film are overlapped, and a thermal bonding part and a remaining part are formed by thermally bonding the peripheral edge leaving a part of the peripheral edge of the front and back film. A pair of inwardly projecting protrusions formed from a plastic film sealed bag having the remaining portion as an air supply / exhaust port and formed from both ends of the heat bonding forming the supply / discharge port into the sealed bag The supply / exhaust passage formed between the pair of inwardly projecting portions and the supply / exhaust port are communicated with each other, and the communication hole including the supply / exhaust port and the supply / exhaust passage is an inner end. Is formed in a funnel shape with a smaller diameter as it approaches, and the inward projecting portion extends horizontally or substantially horizontally from the inner end corner portion by thermal bonding, and then obliquely outwards, and its end is formed into a thermal bonding portion. Air-filled die-packing characterized by being provided in series Wood.

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