JPH10119167A - Non-polluting release film and information communicating unit using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give no danger to animals and plants in a natural field due to decomposition by microorganism even in the case of leaving to stand for in a natural environment by laminating a plurality a plurality of films each containing microbial degradable resin and having collapsibility of the microorganism to be releasable and impossible to readhere after releasing. SOLUTION: In a film laminate obtained by laminating at least two films to be releasable and impossible to readhere after releasing, the film contains microbial degradable resin and has collapsibility of microorganism. The resin contains, for example, polymer such as caprolactone, ethylene adipate or propiolactone, and polyolefin resin. For example, a film 2 of a mixture of 30 pts.wt. of polycaprolactone and 70 pts.wt. of polyethylene is fusion extruded and laminated on a film 1 made of mixture of 50 pts.wt. of polycaprolactone and 50 pts.wt. of polyethylene. The both form a film laminate X which is separatable and cannot be joined after separated at the interface 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peeling film for laminating an information-bearing surface of a communication sheet facing through a fold line, which has been widely used in postcards in recent years, so that it cannot be re-attached after peeling. And an information communication body using the same.

[0002]

2. Description of the Related Art A conventional post-peelable laminated postcard which cannot be re-attached after peeling is peelable, and a post-fabricated post-peeling film which cannot be re-adhered after peeling, is formed by folding two films through a folding line. It can be integrated with a double-sized communication sheet,
At the stage of multi-ply printing paper before cutting, after forming a film layer on its surface, it can be peeled by cutting, folding, heating and pressurizing, it cannot be re-adhered after peeling, or it is integrated into paper fiber It has been manufactured using paper provided with a function of dispersing a resin and being peelable, and having a function of being unable to adhere again after peeling.

[0003]

The peelable and non-removable film used for the laminated postcard uses a conventional polyolefin resin having no biodegradability as it is, so that it is inadvertently discarded. In the case of leakage or recovery after disposal, these resins can be extremely dangerous to wild animals and plants because they continue to exist in the natural environment semipermanently. The present invention is decomposed by microorganisms even if left in the natural environment by mistake,
It is an object of the present invention to provide an information communication body that eliminates factors that are dangerous to animals and plants in the natural world and a pollution-free release film used for the information communication body.

[0004]

In order to achieve the above object, the pollution-free release film of the present invention is a film laminate comprising at least two films which can be peeled off and cannot be re-attached after peeling. Is characterized by containing a biodegradable resin and being degradable by microorganisms. Further, the communication body of the present invention may be integrated by sandwiching the non-polluting release film between the facing communication sheet surfaces on which information is written, or forming the same resin layer as the component resin of the non-polluting release film on the communication sheet surface in advance. Then, they are opposed to each other, subjected to a heating and pressurizing treatment to be peelable, and are integrated so that they cannot be re-adhered after peeling. Further, as another aspect, if a communication sheet formed by dispersing a microbial degradable resin in paper fiber and shaking is used, it can be peeled off by applying heat and pressure treatment after writing information, and cannot be re-adhered after peeling. It is possible to obtain a simplified information communication body.

[0005] The biodegradable resin of the present invention includes, for example,
It is composed of a known polymer such as caprolactone, ethylene diadipate, propiolactone and a known modified and / or unmodified polyolefin resin. The mixing ratio is 2
Although there is no particular limitation on the setting of the peel strength of one film, the peel strength decreases in general as the proportion of the polyolefin increases, so that the peel strength may be appropriately set within a practical range of the peel strength.

As a method of bonding and integrating the non-polluting release film of the present invention with the opposing information writing surface of the communication sheet, a conventionally known pressure-sensitive or heat-sensitive bonding method can be adopted. Therefore, when the heat-sensitive method is selected, a laminate structure of at least two layers in which the two non-polluting release films laminated so that they cannot be separated and cannot be re-attached after peeling also function as a heat-sensitive adhesive is used. At first, a three- or more-layer structure such as forming a new heat-sensitive adhesive layer on the outer surface or interposing another layer between two films can be adopted. Further, each layer may contain various fillers, plasticizers, anti-blocking agents and coupling agents for adjusting the peel strength, and these additives may be present at the interface of each layer. In addition, the surface of each layer may be surface-treated by plasma treatment, corona discharge, or the like, and primer treatment with an anchor agent can also be applied. In any case, there is no problem as long as the resin constituting the layer contains a biodegradable resin.

As a method of integrating a communication body using a non-polluting release film, a non-polluting release film, which has been formed so as to be peelable and cannot be re-attached after peeling, is sandwiched between opposing surfaces of a communication sheet. Adhesion and integration may be performed by a pressure or heat-sensitive method, or one of the non-polluting release films may be continuously or individually formed on a sheet, and then opposed to each other and subjected to a heat and pressure treatment to be integrated. In the latter case, as a method of forming a film layer on the communication sheet, a conventionally known method can be adopted.However, in addition to a method of coating a sheet-like microbial disintegrating resin film via a pressure-sensitive or heat-sensitive adhesive layer, a solvent may be used. It goes without saying that various known film layer forming methods such as coating, emulsion coating, hot melt coating and laminating can be adopted.

Another method for integrating the communication sheet so that it can be peeled off and cannot be re-attached after peeling is to use a paper in which a biodegradable resin is dispersed in paper fibers. In this case, since the paper fibers have an anti-blocking effect, they can be peeled off when subjected to heat and pressure treatment, and cannot be re-attached after peeling.

As a method of forming a pollution-free release film, conventionally known coating methods such as solvent coating, emulsion coating, and hot melt coating are employed in addition to melt extrusion methods such as an extrusion method and a co-extrusion method. It is possible to disperse the microbial decomposable resin into a pressure-sensitive adhesive or adhesive component that has only a slight adhesiveness that can be peeled off when high pressure is applied, and to form a layer that is peelable and that cannot be re-attached after peeling The above object can be achieved.

[0010] Further, regarding the form of the communication sheet, a single piece of communication sheet may be opposed and integrated by a non-polluting release film, or a continuous piece of communication sheet via a folding line may be folded and opposed and integrated. In the latter case, a communication sheet in which a plurality of communication sheet pieces are connected by a plurality of folding lines may be used. Furthermore, more free leaf pieces are added to the finally integrated information communication body, and it is also possible to use a form such as a round-trip postcard connecting a return postcard to an outgoing postcard. A form integrated with a communication sheet piece may be used.

All components such as a film laminate and a communication sheet which are peelable and cannot be re-attached after peeling can be disintegrated by microorganisms.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view of the most basic structure of the pollution-free release film of the present invention, and FIG. 2 is a cross-sectional view of a case where an additional adhesive layer is additionally formed on the structure of FIG. 3A and 3B are a front view and a back view, respectively, of an example of a communication sheet used in the present invention, and FIG. 4 is an information communication integrated using the pollution-free release film of FIG. 1 shows a sectional view of the body. 5a, 5b and 6 are cross-sectional views of a modification of the information communication body according to the present invention. FIG. 7 is a sectional view of a modified example of the film laminate according to the present invention.

FIG. 1 shows a film 1 comprising a mixture of 50 parts by weight of polycaprolactone and 50 parts by weight of polyethylene.
A non-polluting release film obtained by melt-extruding and laminating a film 2 of a mixture of 30 parts by weight of polycaprolactone and 70 parts by weight of polyethylene by an extrusion method. Here, the two formed a film laminate X that could be peeled off without being compatible at the interface and could not be re-attached after peeling.

On both sides of the film laminate X, 30 parts by weight of polycaprolactone and EV as a modified polyolefin were used.
A hot melt layer 4 mixed with 70 parts by weight of A is formed, and as shown in FIG. 3A and FIG. An integrated information communication body Y was produced by combining and performing a sandwiching heating and pressurizing treatment.

In FIG. 5, FIG. 5 (a) shows a printed matter such as a direct mail on a multi-chopped printing paper before cutting.
Film 9 of a mixture of 50 parts by weight of polycaprolactone and 50 parts by weight of polypropylene was laminated, and a silicon layer was formed on the surface of film 9 as an antiblocking agent. Then, the communication sheet cut into a postcard double size was folded from the folding line 6 and subjected to a heating and pressing treatment. The completed communication body Y was peelable from the interface 10 and could not be re-attached after peeling.

FIG. 6 shows a postcard size communication sheet 12.
12 'is integrated by facing with an adhesive layer 11 formed on both sides of the film laminate X in FIG. In this case, the opposing communication sheets 12, 12 'are separated after peeling,
This is a different form from the case of the communication sheet that is spread in a two-page spread.

FIG. 7 shows a three-layer pollution-free release film in which a heat-sensitive adhesive layer 4 containing a biodegradable resin is formed on both sides of a film 1 containing a biodegradable resin. Basically, the structure of the film laminate of the present invention, which can be peeled off and cannot be re-attached after peeling, utilizes temporary adhesion due to wetting at the interface of the resin. It is also possible to design it so that it can also be peeled and also to be unable to adhere again after peeling, and to separate it from the interface 3. In all of the above embodiments, the integrated communication body could be all made of a material that can be broken down by microorganisms.

[0017]

According to the present invention, since the adhesive layer and the communication sheet as well as the film laminate are made of a material that can be broken down by microorganisms, they are easily broken down by microorganisms in nature after disposal and separated and disappeared. I do. Therefore, there is no danger to the life of natural animals and plants and no impact on its ecosystem.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the most basic configuration of a pollution-free release film of the present invention.

FIG. 2 is a cross-sectional view when a new adhesive layer is additionally formed in the configuration of FIG. 1;

FIGS. 3A and 3B are a front view and a back view, respectively, of an example of a communication sheet used in the present invention.

4 is a cross-sectional view of a communication body integrated using the pollution-free release film of FIG. 2 and the communication sheet of FIG. 3;

5 (a) and 5 (b) are cross-sectional views of a modified example of the communication body according to the present invention.

FIG. 6 is a sectional view of another modified example of the communication body according to the present invention.

FIG. 7 is a cross-sectional view of a modified example of the film laminate in the present invention.

[Explanation of symbols]

 1, 2, 9 Biodegradable resin-containing film 3, 10 Peelable, non-re-attachable interface 4 Thermal adhesive layer 5, 12, 12 'Communication sheet 6 Folding line 7 Stamp and postal code column 8 Concealment information 11 Pressure sensitive Adhesive layer X Film laminate Y Information communication body

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[Procedure amendment]

[Submission date] December 20, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

Patent application title: Pollution-free release film and information communication body using the same

Claims (4)

[Claims] 1. A film laminate in which at least two films are laminated so that they can be peeled off and cannot be re-attached after peeling, wherein the film contains a biodegradable resin and has disintegration by microorganisms. Pollution type release film. 2. An information communication body comprising: a non-polluting release film according to claim 1 sandwiched between communication sheets on which information is described; 3. An information communication body, wherein one or each of the pollution-free films according to claim 1 is formed on a communication sheet on or on which information is written, and then folded and integrated. 4. The information communication body according to claim 2, wherein the communication sheet is separated.