EP0411143A1

EP0411143A1 - Postcard and manufacturing method thereof

Info

Publication number: EP0411143A1
Application number: EP90902693A
Authority: EP
Inventors: Noboru Matsuguchi; Tadashi Matsuguchi
Original assignee: Daimatsu Kagaku Kogyo Co Ltd
Current assignee: Daimatsu Kagaku Kogyo Co Ltd
Priority date: 1989-02-01
Filing date: 1990-01-31
Publication date: 1991-02-06
Also published as: GB9020670D0; AU5032490A; GB2236507A; LU87815A1; JPH02204095A; KR910700155A; WO1990008660A1; NL9020165A

Abstract

Une carte postale comprend une matière de carte postale ainsi qu'une matière de couverture collée à ladite matière de carte postale et couvrant au moins une partie de celle-ci. Ladite matière de couverture comprend une matière de base sur la surface principale de laquelle est formée une couche de résine thermoadhésive, ainsi qu'une couche de retardement d'adhésion formée sur la surface principale de cette couche de résine thermoadhésive, et réduisant partiellement la force adhésive de la matière de carte postale précitée pour la faire coller de manière faible à la matière de carte postale précitée. On peut par conséquent décoller, au niveau de la partie de la couche de retardement d'adhésion, ladite matière de couverture de ladite matière de carte postale de manière comparativement simple, et on peut voir diverses informations formées sur la surface principale de la matière de carte postale.A postcard comprises a postcard material as well as a cover material adhered to said postcard material and covering at least a part thereof. Said covering material comprises a base material on the main surface of which is formed a layer of thermoadhesive resin, as well as an adhesion retarding layer formed on the main surface of this layer of thermoadhesive resin, and partially reducing the force. adhesive of the above postcard material to make it weakly stick to the above postcard material. Therefore, at the part of the adhesion retarding layer, said cover material can be peeled off from said postcard material in a comparatively simple manner, and various information can be seen formed on the major surface of the postcard material. Post card.

Description

DESCRIPTION

POSTCARD AND MANUFACTURING METHOD THEREOF

Technical Field The present invention relates to a postcard which i covered so that part of which cannot be seen. Mor specifically, the present invention relates to a postcar which confidential matter is covered in transit by post and just recipient can see the confidential matter suitably, an a manufacturing method thereof.

Background Art

Recently, mails printed confidential matter such as letter of bank account are increased, and it is desired t develop a postcard which the confidential matter is covere in transit by post and the just recipient can see th confidential matter easily.

Conventionally, as seen in Japanese Utility Model Paten Publication No. 54-3789, a postcard, which an inner-fram portion can be peeled off partially and confidential matter of the bottom layer can be seen, has been developed.

However, in order to facilitate peeling partially, a seen in Japanese Utility Model Patent Publication No. 54 3789, a front paper must be possible to peel off partially b forming an adhesive surface formed by coating a dry past entirely on the front paper surface, and by subjecting th other postcard material to a peeling process such as silico processing so as to be peeled off partially or only th inner-frame portion is peeled off. Thus, in the prior ar postcard, since the dry paste must be coated on the fron paper side and the peeling processing such as silico processing must be performed on the postcard material side i manufacturing, structures of the postcard become complicate and result in a high manufacturing cost due to man manufacturing processes.

Therefore, it is a principal object of the presen invention to provide a postcard, in which surface treatmen of the postcard material is not required any only by post processing of the sticking material for covering confidential matter, a portion which is possible to be peele off partly and a portion which is adhered completely ar divided, in which the confidential matter is covered i transit by post and the just recipient can see th confidential matter easily, and a manufacturing metho thereof .

Disclosure of Invention A first invention is of a postcard comprising a postcar material and a coverring material which is formed integra with the postcard material and is stuck to the postcar material in a folded-back fashion and covers at least part o the postcard material, wherein the covering materia comprises a base material which a heat adherent resin laye is formed on the main surface thereof, and an adhesio retarding layer for partially reducing the adhesive force o the heat adherent resin layer to make it adhere weakly to th postcard material.

A second invention is of a method of manufacturing postcard which comprises a process of preparing a postcar stuff comprising a postcard material and a base materia which is formed integral with the postcard material an covers at least part of the postcard material in a folde back fashion, a process of printing or coating th information on the postcard material, a process o manufacturing a covering material by forming a heat adheren resin layer on the main surface of the base material an forming an adhesion retarding layer which partially reduce the adhesive force of the heat adherent resin lkayer an makes it adhere weakly to the postcard material on the mai surface of the heat adherent resin layer, and a process whic folds back the base material of the postcard stuff, an sticks the above-mentioned heat adherent resin layer side o the covering material to the postcard material.

According to the present invention, since the adhesiv surface of the covering material to the postcard material i divided into the exposed portion of the heat adherent resi layer and the adhesion retarding layer which reduces th adhesive power of the heat adherent resin layer to weaken it adhesiveness to the postcard material, when heated an adhered thereto, the exposed portion of the heat adheren resin layer is adhered strongly to the postcard materia whereas the portion formed with the adhesion retarding laye is adhered more weakly thereto.

Brief Description of Drawings

Fig. 1 is a perspective view of a postcard which is a embodiment of the present invention.

Fig. 2 is a fragmental sectional view of the above mentioned embodiment.

Fig. 3A is a perspective view showing a state that covering material is peeled off, and Fig. 3B is a fragment sectional view thereof.

Fig. 4 is an illustration vaiew of a manufacturin apparatus showing an example of a method of manufacturing postcard.

Fig. 5 is a perspective view of a postcard stuff.

Fig. 6 is an illustration view showing a state that t covering material of the postcard stuff of the abov mentioned embodiment is stuck to the postcard material in folded-back fashion.

Fig. 7A and Fig. 7B are perspective view of a embodiment other than the above-mentioned. embodiment, an Fig. 7A shows an original state thereof, and Fig. 7B shows peeled-off state thereof.

Fig. 8A and Fig. 8B are fragmental sectional views o the illustration example in Fig. 7, and Fig. 8A shows a original state thereof, and Fig. 8B shows a peeled-off stat thereof .

Fig. 9 is a plan view showing still another embodimen of the present invention.

Fig. 10 is a plan view showing a modified example of th postcard as shown in Fig. 9.

Best Mode for Carrying Out the Invention

The above and other objects, features and advantages o the present invention will be more apparent from th following detailed description taken in connection with th accompanying drawings.

Fig. 1 is a perspective view showing a postcard i accordance with the present invention.

Fig. 2 is a fragmental sectional view of the above mentioned embodiment.

This postcard comprises a postcard stuff 10, and th postcard stuff 10 comprises a postcard material 11 formed i the size of the government postcard and a covering materia 12 stuck to part of this postcard material 11. The coverin material 12 is formed integral with the postcard material 1 in a manner of extending from one end thereof and is stuck t the postcard material 11 in a folded-back fashion.

The covering material 12 includes a base material 1 which is formed integral with the postcard material 11 in manner of extending from one end thereof. The base materia 14 is formed with a relatively soft material such as paper synthetic resin film and the like which can be cut by scissors or the like, and a suppression layer 16 is formed o one main surface thereof.

The suppression layer 16 is formed by printing a silve ink and the like or laminating a film material such as a aluminum foil having a suppressiveness with adhesives.

On the surface of the suppression layer 16, a lottery 1 is formed by printing a letter such as "winning" or "lose".

Furthermore, on the surface of the suppression layer 1 a heat adherent resin layer 20 is formed by coating the he adherent resin as heating and extruding it, or by gravure silk screen printing as dissolving it in a solvent o despersing in water.

The heat adherent resin layer 20 is formed to melt about 100°C to 200°C so as to be adhered completely to t postcard sheet 10 such as the paper. On the main surface of the heat adherent resin layer 2 an adhesion retarding layer 22 which reduces its adhesi power partly to weaken adhesiveness to the postcard materi 10 is formed partly.

The adhesion retarding layer 22 is formed by printin or coating a suitably selected resin which, when the hea adherent resin layer 20 is heated and melted, ha adhesiveness only at the temperature higher than the non adherent resin or the resin selected as the heat adheren resin forming the heat adherent resin layer 20.

In this embodiment, the heat adherent resin layer 20 an the adhesion retarding layer 22 are formed of transparen materials or translucent materials for enabling access to th lottery 18 through these layers 20 and 22. But, when th lottery 18 is formed on surface of the adhesion retardin layer 22, these layers 20and 22 may be made of opaqu materials.

As an example of heat adherent resin, adhesives of EV group may be selected. The composition comprises an EV (ethylene-vinyl acetate copolymerized resin), tackifier, wa and anti-oxidant, to which sometimes a plasticizer and fille are added as an adjuvant.

As the tackifier there are glycerin of partiall hydrogenated rosin, glycerin-ester of rosin, pentaerythrito modified rosin, petroleum resin, o -methylstyrene/viny toluene copolymer, terpene oil polymer and terpene-pheno polymer, etc.

As the wax, there are paraffin wax, microcrystallin wax, low molecular weight polyethylene wax, Fischer-Tropsc wax, caster wax and chlorinated paraffin, etc.

As the anti-oxidant, there are hindered phenol grou compound, salicylic acid group compound, benzophenone grou compound, benzotriazol group compound, phosphorus grou compound, sulfur group compound, organic metal grou compound, etc.

As the heat adherent resins other than the aforesai examples, there are polyethylene, ethylene-ethylacrylat copolymerized resin, ethylene-acrylic acid copolymerize resin, ethylene-methyi acrylate copolymerized resin ethylene-methyl methacrylate, ethylene-methacrylic aci copolymerized resin, ionomer resin, polymethylpenten resin, ethylene-vinylalcohol copolymerized resin vinylidene chloride resin, vinyl chloride-vinyl acetat copolymerized resin, polyamide resin, stylene-acryli acid copolymerized resin, polystylene resin, polyacryli acid copolymerized resin, polyester resin polyurethane resin, waxes, etc. When printing and coating these resins can be suitably used as heating or dissolving i a solvent or dispersing in water.

As an example of adhesion retarding layer 22, material which show adhesiveness at the higher temperature than th heat adherent resin or not at all may be selected.

For example, an ultraviolet ray curing ink may b selected. The ultraviolet hardening ink comprises a colo material, pre-polymer, monomer, light initiator, sensitize and additives. Asthe pre-polymer, there are epoxy acrylate polyolacrylate, polyester acrylate, polyether acrylate unsaturated polyester, cationic polymerizing resin, melamin acrylate, unsaturated polybutadiene, drying oil acrylate an silicon acrylate.

As the monomer, there are monofunctional acrylates suc as 2 -ethyl acrylate, 2-hydroxyethyl acrylate, 2-hidroxypropy acrylate and 2-hydroxyethyl methacrylate, and bifunctiona acrylates such as 1 , 3-butanediol diacrylate, 1 , 4-butanedio diacrylate, 1 , 6-hexanediol diacrylate, diethylene glyco diacrylate, neopentilglycol diacrylate, polyethylene glycol #400 diacrylate, hydroxybivalic acid ester neobenzyl glycol diacrylate, diethylene glycol dimethacrylate and polyethylene glycol #200 dimethacrylate, etc. and multifunctional acrylates such as tr imethy lolpr opane triacrylate, pentaerythritol triacrylate, tr imethy lolpropane trimethacrylate , trimethylolethane tr imethacrylate, tetramethylolmethane tetraacrylate, dipentaerythritol hexaacrylate, etc. In addition vinyl ether, itaconic acid ester and N-vinyl pyrolidone may be used. As the light initiators, there are biacetyl acetophenone, benzophenone, Michler's ketone, benzyl benzoin, benzoin isobutyl ether, benzyl dimethylketal tetramethylthiuram sulfide, azobisisobutylnitrile, benzoy peroxide, 1 -hydroxycyclohexilphenyl ketone, θ( -hydroxyisobuty p enone, p-isopropyl-θ(-hydroxyisobutyl phenone, etc., i particular, benzophenone and its derivatives are used.

As the sensitizers, there are aliphatic amines such a n-butyl amine, di-n-butyl amine, triethyl amine diethylaminoethyl methacrylate, etc., nitrogen heterocycli compounds such as amines containing aromatic radical piperizene, etc. sulfur compounds such as allyl group, O tolylthiourea , sodium diethyldithiophosphate , soluble salt o aromatic sulfinic acid etc., phosphorus compounds such as N N-disubstituent-p-aminobenzonitrile compound, tri-n-buty phosphine, sodium diethylthiophosphate, etc. and nitrogen compounds such as Michler's ketone, N-nitrosophydroxylamin derivatives, oxazoline compound, etc. and chlorine compound such as carbon tetrachloride, hexachloroethane , etc.

As the additives, there are an anti-mist agent lubricant, anti-oxidant, drying agent, wetting agent, wax etc.

As the color materials, there are an organic pigment body pigment, carbon black, titanium dioxide, metal powder etc. Subsequently, description is made on a method o manufacturing this postcard with lottery.

First, continuous paper for forming the postcard stuf 10 is prepared. The portion of the postcard material 11 an the portion of the base material 14 are formed continuousl in the direction of width of this continuous paper. Accordingly, the length of the continuous paper in th direction of width is a sum of the length of the postcard material 11 and the length of the base material 14.

On one of the main surfaces of the base material 14 portion of this continuous paper, a suppression layer 16 is formed by allover printing with a silver ink, for example, by the known printing method as the offset printing or coating.

The lottery 18 is formed on the surface of the suppression layer 16 by printing a letter such as "winning", "lose" or "number".

As showing Fig. 4, a rolled laminate comprising the postcard stuff 10 formed with the suppression layer 16 is mounted on a hold roller 32 of a covering material manufacturing machine 30.

The postcard stuff 10 held by the hold roller 32 is loosen at one end and led to a heat adherant resin coater 34.

The heat adherent resin coater 34 is designed to print and coat the heat adherent resin 20a containing, for example, the aforesaid ethylene-vinyl acetate copolymerized resin as a main component, on the suppression layer 1 6 of the bas material 1 4 while heating to a suitable temperature .

The postcard stuff 10 is formed by printing or coati the heat adherent resin 20a onto the base material 14 is th guided to a dryer 3 6 including a cold air blower, whereby t heat adherent resin 20a is dried and the heat adherent res layer 20 is formed.

Next , the postcard stuff 10 which is formed by layi the heat adherent resin layer 20 on the base material i directed to an adhesion retarding agent coating apparatus an adhesion retarding agent 22a.

An adhesion retarding agent coating apparatus 40 is t printing or coating machine utilizing known printing coating methods such as a typographic printing, gravu printing, silk screen printing, offset printing . or the like

When printing or coating the ultraviolet ray curi ink, for example, the typographic printing machine i selected and 4 to 6 g/m² of ultraviolet ray curing ink is coated.

The postcard stuff 10 wherein an adhesion retardi agent 22a is printed or coated on the heat adherent res layer 20 is led to a solidifier 44. As the solidifier 44 the present embodiment, a high voltage mercury lamp is us to irradiate 1 60 W/cm per second.

Thus , a s s ho w n i n Fi g. 5 , the p os tcard s tuf f includes the covering material 12 is formed by laying th suppression layer 16, the heat adherent resin layer 20 o the base material 14 and the adhesion retarding layer 2 is formed with a distance in the wide direction of th base material 14.

The postcard stuff 10 is led to a perforator 48 fo cutting perforations 24 for separation, thereby forming th perforations 24 at a prescribed distance.

Subswquently, this postcard stuff 10 is led to covering material sticking apparatus 50 sticking thi covering material 12 to the postcard material 11. At thi time, to cover a confidential matter such as a residua amount deposited in a bank which is formed on part of th surface of the postcard with the covering material 12, it is necessary to print prpper characters in advance on a prope place, for example, the lower column of the surface of th postcard material 11. Also, in the case of forming a lottery part on the postcard material 11 side, it is necessary to form the lottery part in advance at the portion to be covered by the covering material 12.

Then, as shown in Fig. 3A, in the case of covering a confidential matter such as a residual amount deposited in a bank which is formed on part of the surface of the postcard, perforation 24 is preferably formed so that the adhesion retarding layer 22 side can be separated in the vicinity of the boundary between the adhesion retarding layer 22 and th heat adherent resin layer 20.

In addition, in the case of making this coverin material 12 adhere, for example, to the lower column of th postcard, as shown in Fig. 6, the postcard stuff 10 is fe sequentially, and it is folded back at the boundary betwee the postcard material 11 portion and the covering material 1 portion, and the covering material 12 and the postcar material 11 are bonded. Then, the portion where the hea adherent resin layer 20 is exposed and the heat adheren resin layer 20 located under the adhesion retarding layer 2 are activated by heating while the surface of postcard stuf 10 is pressed by a heating roller, and the covering materia 12 is stuck to the surface of the postcard material 11 Then, the postcard stuff 10 is cut in a proper size, and th postcard of the present invention is formed.

Thus, by thermal adhesion of the postcard material 11 the covering material 12 adheres strongly to the postcar material 11 at the portion where the heat adherent resi layer 20 is exposed, and the underlayer heat adherent resi layer 20 adheres weakly thereto at the portion where th adhesion retarding layer 22 is formed. Accordingly, as show in Fig. 3A and Fig. 3B, at the portion where the adhesio retarding layer 22 is formed, this covering material 12 ca be separated comparatively simply from the postcard materia 11.

Though the rolled continuous paper is selected as th postcard stuff 10 in the foregoing embodiment, the bas material separated into each piece, so-called, sheets may b selected.

Also, on the base material 14, any suitable printin which fits to properties of the postcard may be performed, o when the continuous material is used as aforesaid embodiment for example, a detecting mask for detecting feeding pitche of the base material 14 may be printed with a black color o the like.

In the above-metnioned embodiment, the adhesio retarding layer 22 is formed in a belt shape with prope intervals kept in the direction of width of the base materia 14, but the portion where no adhesion retarding layer 22 i formed may be installed in a spot shape in the vicinity o the lengthwise end edge of the base material 14. Thereby the portion where the heat adherent resin layer 20 is expose is formed in a spot shape in the vicinity of the end edge o the base material 14, and when this covering material 12 i stuck to the postcard material 11, this covering material 1 can be prevented from being peeled carelessly off th postcard material 11 from the vicinity of the lengthwise en edge of the base material 14.

Fig. 7 through Fig. 8 are views showing anothe embodiment.

Fig. 7A and Fig. 7B are perspective views of a embodiment other than the above-mentioned embodiment, an Fig.7A shows an original state thereof, and Fig.7B shows peeled-off state thereof. Then, Fig. 8A is a fragmenta sectional view of the embodiment as shown in Fig. 7A, an Fig.8B is a fragmental sectional view of the embodiment a shown in Fig. 7B.

In this embodiment, perforations 66a and 66b are forme on the left side of a covering material 62 in a portio where an adhesion retarding layer 64 is formed, in a manne of extending from one edge of the covering material 62 t the other edge thereof, and being parallel with each othe at a narrow distance. Thus, the base material 68 can be cu off.

Furthermore, between the perforations 66a and 66b one edge of the base material 68 is chipped, thus the edg can be easily peeled by a finger and a fingernail, and th base material 68 can be easily cut off. On the edge of th base material 68 between the perforations 66a and 66b, protruding piece for picking the base material 68 easily ma be formed in place of the edge is chipped.

Also, a perforation 74 for separation is formed to th right-side of the covering material 62 so as to cut th covering material 62 peeled from a postcard material 70 a a portion adhered completely with a heat adherent resin laye

72.

Also , a lottery 76 is formed on the postcard materia

70 in this embodiment.

When the base material 68 i s made of paper , th perforations 66a , 66b and 74 are formed along a directio which is a paper feeding direction in a papermaking, that is a paper fiber line direction.

In each of the above-mentioned embodiments, perforatio may be formed along the circumference of the base material o the covering material. By forming the perforation in such manner, only the central portion of the covering material ca be peeled of f . In thi s case , a s shown i n Fi g. 9 , b conf iguring one perforation 224 with a linear perforated portion 224a and an arc-shaped perforated portion 224b s that the adjacent perforations 224 are partially overlapped when viewed in the direction of peeling off the covering material 212 , the central portion of the covering material 212 can be easily peeled of f. In addition, to make it possible to easily peel off the central portion of the sticking material as described above, for example, as shown in Fig. 10 , the perforation 324 may be formed into the base material 314 obliquely so that the adjacent perforations 324 are partially overlapped when viewed in the direction of peeling off the covering material 312. In the postcard as shown in Fig. 9 and Fig. 10 , b pulling the covering material in the direction as shown by a arrow , the covering mater ial between the adj acen perforations is broken as the direction thereof is shown b an arrow of dash-dot line, and the covering material of th portion encompassed by the perforation is peeled off.

Industrial Applicability

In accordance with the present invention, the adhesiv surface of the covering material to the postcard material i divided into a portion where the heat adherent resin laye formed on the main surface of the base material is expose and a portion where the adhesion retarding layer is forme which reduces the adhesive force of the above-mentioned hea adherent resin layer to stick it weakly to the postcar material , and when adhering to the postcard material , th portion where the heat adherent resin layer is expose adheres completely to the postcard material, and the portio where the adhesion retarding layer is formed adheres weakl to the postcard material .

Accordingly, in the postcard, the sticking material ca be peeled off relatively easily from the postcard material a the portion of adheision retarding layer, thereby enablin acces s to variou s inf o rmati on formed on the postcar material . Moreover, according to the present invention, since th postcard divided into the portion adhered temporarily and th portion adhered completely can be obtained by heating an adhering the covering material to the postcard materia without processing the postcard material, only hea processing is required in manufacturing, enabling broa applications.

Besides, the postcard is just needed to be processed t the covering material in manufacturing and the postcar material is not necessary to be processed, so that it manufacturing process as well as an adhesion machine of sticking material used in manufacturing postcards can b simplified with ease.

Although the present invention has been particularl described and illustrated in the drawings, it is to be understood that such description is for illustrative purpose only and not restrictive. The spirit and scope of the present invention is, thereofre, to be determined solely by the appended claims.

Claims

1. A postcard comprising a postcard material, and a covering material which is formed integral with sai postcard material, and is stuck to said postcard material i a folded-back fashion, and covers at least part of sai postcard material, wherein said covering material comprises a base materia which a heat adherent resin layer is formedon the mai surface thereof, and an adhesion retarding layer whic partially reduces the adhesive force of said heat adheren resin layer to make it adhere weakly to said postcar material.

2. A method of manufacturing a postcard comprising a process of preparing a postcard stuff comprising postcard material and a base material which is forme integral with said postcard material, and covers at leas part of said postcard material in a folded-back fashion, a process of printing or coating picture lines on sa postcard material, and a process of manufacturing a covering material forming a heat adherent resin layer on the main surface the base material and forming an adhesion retarding lay which partially reduces the adhesive force of said he adherent resin layer and makes it adhere weakly to sa postcard material on the main surface of said heat adheren resin layer, and a process which folds back said base material of sai postcard stuff, and sticks said head adherent resin laye side of said covering material to said postcard material.