JPS58177343A - Sheet body made of synthetic resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet made of thermoplastic synthetic resin, particularly a sheet used as a sealed packaging material, and more specifically, it has excellent content resistance and mechanical strength. Nevertheless, the object is to obtain a sheet body that can be easily opened and torn.

Packaging sheets made of thermoplastic synthetic resin are often used for sealed storage of ham, sausage, cheese, and other items. It is possible to take measures such as making a cut in the body itself in advance to make it easier to break than this cut part &C, or gluing other pieces (pull tabs) etc. in advance. Ta.

For this reason, it is necessary to make the notch after forming the sheet-like body alone.
．． The molding operation is troublesome because it requires one-step molding or post-processing such as partial adhesive molding.

However, in the case of shaping notches, -f, l: i/(locally thin parts of the sheet body will be shaped, so the tensile strength etc. of the sheet body itself will deteriorate. ,] There is an inconvenience.

[++Force, ′For those that glue parts of the pulley.

Basically, the smell will lose its sheet-like form 1-9
: 1% if it becomes unsuitable for the purpose of wrapping.
6.'7- Since the relationship of lI& occurs in the body, it is inconvenient to increase or remove the product, and furthermore, there is a drawback that the number of articles that can be packaged is limited due to the problem of content resistance.

The present invention was devised in order to overcome the drawbacks of the conventional examples mentioned above, and it is possible to use a thermoplastic synthetic resin material and other thermoplastic synthetic resin materials with low or no adhesive properties to the thermoplastic synthetic resin material. This method takes advantage of the ease of peeling between the parts molded with the n resin material in the molded integral product molded with the 1lfil resin material when the two are extruded together.

The present invention will be described below with reference to the drawings showing embodiments thereof.

The sheet body made of synthetic wood according to the present invention is produced by appropriately applying heat Ii to a plastic synthetic resin material by molding this sheet-like matrix 1 into a part of the sheet-like matrix 1 molded from a plastic synthetic resin material. On the other hand, it is constructed by embedding an elongated string-like body 2 molded from a thermo-I1 plastic synthetic resin material with extremely low adhesiveness.

That is, it is the sheet-like matrix straddling that functions as a packaging material, and the string-like body 2 does not function as a covering material at all.

Therefore, it goes without saying that the sheet-like matrix 1 has excellent content resistance and high mechanical strength with various types of Bayer properties, but the adhesion to this sheet-like matrix 1 is pitifully low. It is preferable that it be molded from a synthetic resin material with tensile strength and cylindrical heat c11vJ.

For example, polyethylene resin is suitable as the thermoplastic synthetic resin material for molding the sheet-like matrix 1, and polypropylene Jfl+Hfl is suitable as the thermoplastic synthetic resin material for molding the string-like body 2 in contrast to this polyethylene resin. It is.

The synthetic resin sheet body according to the present invention has a shape of 1 (
For example, the U opening shown in the jr1 diagram is not defined.
It may be in the form of a simple sheet, or it may be in the form of a thin cylinder as shown in Figure 2.

In addition, embedding of the string-like body 2 into the sheet-like matrix 11.
The burial position is also not limited in the same way.
As shown in Figures 1 and 2, ii! It may be linear, or other shapes such as circular are also suitable.

No matter what the overall shape of the string-like body 2 is.

A string-like body is a sheet-like matrix formed into a thin sheet.
As is clear from the cross-sectional shape shown in Figure 9, among the portions of the sheet-like base 1 located around the string-like body, the portions located on both surfaces of the sheet-like base 1 are extremely thin. It becomes thin.

For this reason, if the string-like material is pulled up by an appropriate means, it will be difficult because the adhesiveness between the string-like material 2 and the sheet-like matrix l is extremely low and the portion 11 is extremely thin. The portions lsL are sequentially broken as the string-like body is pulled up.

In this way, when the string-like sheet-like matrix 1 is expanded, one part 1 is removed by the removal operation of the string-like matrix 1.
1L is broken, and the part of the sheet-like base l where the string-like body 2 was located is now obscured only by the other extremely thin part 11L.

Therefore, if a tensile force is applied to this portion 1aKilQ, this portion 11 will break into a container, thereby coupling the breakage of the sheet-like matrix l.

One part i by pulling up the string-like body 2
Before breaking a, the part of the sheet-like matrix 5 where the string-like body 2 is located is connected to the two-stroke parts ta and ta, and therefore has considerable durability against tension from the outside. able to demonstrate.

The tensile resistance of the sheet-like base l in which this string-like body 2 is buried @
If there is any doubt, it is sufficient to use a synthetic resin material for forming the string-like body 2 that exhibits sufficient adhesion to the synthetic resin material for forming the sheet-like base body l.
Alternatively, the thickness of the sheet-like matrix l of the string-like body 2 in the thickness direction may be reduced to increase the thickness of the portion 1a to a certain extent.

In addition, since the string-like body 2 is located completely (submerged) within the sheet-like matrix l, the surface of the sheet-like body as a whole is smooth, and therefore the relationship of sheet body VC and surface is created. Since it can be handled in the same way as a normal sheet body, handling and processing are easy.

Furthermore, since the sheet body according to the present invention is molded by simultaneously extruding the sheet-like matrix l and the string-like body 2 using the same extruder, no post-processing is required, and the molding operation is also performed by extrusion. pressure control.

It can be installed arbitrarily by controlling the temperature, etc.

As is clear from the above description, the sheet body according to the present invention has completely smooth surfaces on both sides, so there is no front-back relationship, and the handling and packaging molding are extremely easy due to curling. In addition, since the tensile strength before removing the string 2 can be increased, it is possible to significantly reduce anxiety caused by insufficient tensile strength in this type of packaging sheet. If 11L is broken, the breakage can be easily and reliably achieved with the action of a small amount of force, and has many excellent effects.

[Brief explanation of drawings]

Figure 1 and Figure 2 are cross-sectional perspective views of essential parts showing true embodiments of the present invention. Figure 9 shows the case where it is applied to a simple sheet-like body, and Figure 1 and 2 shows the case where the solid line is drawn to a cylindrical body. This shows that. Explanation of symbols l: Sheet-like matrix. 2... String-like body. Iris... part. Inventor Yoshiyuki Ichizawa Inventor Kushi 1) Hideo Inventor Sumio Takahashi Inventor - 1) Protective applicant Yoshino Kogyo Co., Ltd. Representative Yatabe Yoshino

Claims (1)

[Claims] A thin strip made of a thermoplastic synthetic resin material that has extremely low adhesiveness to the thermoplastic synthetic resin material being molded is attached to a part of the sheet-like matrix molded from an appropriate thermoplastic synthetic resin material. A synthetic resin sheet body made of N number of string-like bodies.