JPH03176380A - Cushioning material - Google Patents

Abstract

PURPOSE:To enhance cushioning performance by a method wherein a bag is made of synthetic resin film, a foamed body having a continuous gas-containing part such as foaming polystyrol is sealed in the bag and holes are formed in the synthetic resin film by needle, the edged tool having a sharp end and the pressure of a gas or liquid injected from a small hole. CONSTITUTION:A foamed body 2 is the formed mass having gas passages formed therein wholly or partly in communication with one another and containing a gas such as air in a solid or semisolid state. It is then placed into the bag made of synthetic resin film 1. The synthetic resin film 1 has small holes 4 of at most 0.5mm formed therein by needle, etc. When the cushioning materials thus made are placed into a packing case and forced into between each of the articles therein, the air is expelled from the cushioning materials to permit them to be inserted easily therebetween and, with the passage of time, they are expanded sufficiently to form perfect cushions. Since such expanded cushioning materials have the holes shaped into a convex form, the gas is difficult to escape to the exterior, leading to the retention of a perfect cushioning function.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to cushions for protection used for box packaging, etc.
This relates to cushioning materials.

Conventional Techniques IFj There are no perforated cushioning bags with a built-in foam material, and especially regarding the shape of the perforated holes, no similar HL 9i or O materials are commercially available.

Problem to be Solved by the Invention Development of a cushioning material that is simple, has an effective cushioning force, and can be produced and used industrially.

Means for Solving the Problem A bag is made from a synthetic resin film 1, and a foamed molded product 2 having an open cell portion such as expanded polystyrene is sealed inside the bag, and a sharp blade such as a needle, or a hole is inserted into the bag. The synthetic resin film 1 is perforated by the pressure of gas, liquid, etc. spouted out.
Use as a buffer material.

Function The foamed molded product 2 is a molded product with a completely or partially continuous airway, is solid or semi-solid and contains gas such as air inside, and is made of synthetic resin frame 1. It is contained in a sealed bag.

Fine holes 4 of Q,'::) mm or less are perforated in the synthetic resin film 1 with a needle or the like.

When the cushioning material prepared in this way is placed in a packaging box and press-fitted into each packaged item, the air in the bag for slow insertion is temporarily released from inside the bag to the outside, making it easy to remove each packaged item. It is inserted between articles and expands over time to form a complete cushion.

The internally expanded buffering material has a convex hole, so it is difficult to leak to the outside and provides a perfect buffering effect.

Example A 0.1 mm high-pressure polyethylene film was used as the synthetic resin film 1, the length and width were 30 cm, one end was used as the seal part 3, and the other end was 11"52' with a diameter of about 20 mm.
The bag-like synthetic resin film 1, which is made from polystyrene foam and is used as a sealing part, is filled with several tens of pieces (made from styrofoam cubes) and sealed at the other end. hole 4 to 5
Drill several holes 4 at intervals of cm to IQ cm.

At this time, if the hole 4 is a small hole and the perforated part of the synthetic resin film 1 is perforated in a convex shape 5, it is necessary to
The action is completely carried out, and the cushioning properties are exhibited even after the inoculation of the subordinate fruits.

Effects of the Invention The foamed molded body 2 built into the bag made of the synthetic resin film 1 has the function of sucking in and exhausting gas, and the hole 4 formed in the convex shape 5 has a valve function that automatically opens and closes. Therefore, the bag can be easily inserted between each packaged article, and after insertion, the bag expands again to improve the cushioning properties between each packaged article 2, and has the effect of being industrially inexpensive and having a stable function.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the present invention, Fig. 2 is a plan view, Fig. 3 is an enlarged explanatory view of the hole, and Fig. 4 is a perspective view for explaining the present invention (1 in the figure is a synthetic resin film, 2 is a synthetic resin film, Foamed molded product, 3 and 8' are sealing parts, 4 is a hole, and 5 is a convex shape.)

Claims (1)

[Claims] A bag is prepared in which a foamed molded product 2 having an open cell portion, such as expanded polystyrene, is embedded in a flexible synthetic resin film 1 made of polyethylene, ethylene-vinyl acetate copolymer, etc., and 0. Minute holes of 5 mm or less 4
is perforated with a needle or the like, and a portion of the synthetic resin film 1 is formed into a convex shape 5 inside the synthetic resin film 1 when the hole 4 is made.