JPH06315408A - Method to laminate substrate made of synthetic resin with sheet - Google Patents

Abstract

PURPOSE:To improve the working efficiency of the process to laminate the substrate with the sheet, in the method to laminate the substrate made of the synthetic resin with biodegradable characteristic with the sheet of similar nature. CONSTITUTION:The substrate 1 is formed by the biodegradable synthetic resin mainly composed of starch and the material having the biodegradable characteristic is also used as sheet 3; after melting the surface of the area to laminate of the substrate 1 with water, said area with such melted surface is placed facing the area to laminate of the sheet 3 and the melted part of the substrate 1 is hardened in such condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a sheet made of synthetic resin, paper or the like to a synthetic resin base material.

[0002]

2. Description of the Related Art Uchiwa is a seasonal product, and its production is concentrated in one period, so it is necessary to mass-produce it. Therefore, recently, the skeleton of the fan is manufactured by injection molding a synthetic resin such as polypropylene. Then, as a method of attaching the coated paper to this type of bone body, there is one disclosed in Japanese Patent Publication No. 58-20605. In this method, the coated paper is a so-called laminated paper in which the back surface of the ordinary coated paper is a synthetic resin layer, and the synthetic resin layer of the coated paper is heated in a state of being opposed to each other through a group of ribs. -By applying pressure, the synthetic resin layers of the front and back cover paper located between the ribs are melt-bonded to each other, and the cover paper is attached to the front and back. Further, the coated paper sticking portion is trimmed into a predetermined shape and subjected to finishing treatment such as curling, so that the fan is completed.

In this method, it is not necessary to dry the coated paper adhering portion, so that the productivity is high. On the other hand, the fan is often used as it is during the season and then discarded as it is. In the case of the above type, since the skeleton is formed of thermoplastic polypropylene resin or the like as described above, and the synthetic resin layer of the coated paper is also the same resin, it is left in a natural environment. Then, there is a problem that it is not biodegraded and remains semi-permanently. Further, even when it is treated as garbage, there is a problem in that harmful gas is generated when incinerated.

Therefore, in order to solve such a problem, there is a structure in which the bone body is formed of a biodegradable synthetic resin and a biodegradable coated paper such as ordinary pulp paper is pasted onto the bone body. Although conceivable, this gluing method is not good in workability, since the gluing work is performed manually, and the gluing adheres to clothes or hands. Further, this work requires skill in order to ensure sufficient finish of the product.

[0005]

The present invention has been made in view of the above points, and in the "method of attaching a similar sheet to a base material made of a synthetic resin having biodegradability", The technical task is to improve the workability of attaching the sheet.

[0006]

[Technical Means] The technical means of the present invention taken to solve the above-mentioned technical problem is that "the base material (1) is formed of a biodegradable synthetic resin containing starch as a main component, and This sheet (3) shall be biodegradable and
In the state where the surface layer part of the sticking range of (1) is melted with water, the sticking ranges of these base material (1) and sheet (3) are contacted with each other, and in this state, the base material (1) That is, the fused part of the above is cured.

[0007]

The above technical means of the present invention operates as follows. The base material (1) is formed into a predetermined shape by a method such as injection molding using a biodegradable synthetic resin containing starch as a main component, which is produced from corn or potato.
The sheet (3) attached to the base material (1) has biodegradability.

When the area where the base material (1) is adhered is wetted with water, the base material (1) contains starch as a main component, so that the surface layer portion of the wet area is melted. It becomes pasty. In this state, when the aforesaid sticking range and the sticking range of the sheet (3) are brought into contact with each other, these sticking ranges are adhered.
In this state, when the adhesive part is cured by a method of drying the contact part by heating, etc.
The attachment of (1) and the sheet (3) is completed.

[0009]

[Effects] The present invention having the above-described structure has the following unique effects. The product produced by this method is
Since (1) and the sheet (3) are formed of biodegradable products, even if the product is left in the natural environment after use, it will decompose over time and remain semi-permanently in the natural world. Inconvenience can be resolved.

Further, in this method, the base material (1) itself is made to have adhesiveness by wetting the base material (1) with water. Work) is unnecessary. Therefore, this workability is improved.
Further, since a method of spraying water with a mist spray or the like can be adopted to generate the adhesiveness, mechanization of this step is easy, and workability is improved also in this respect.

[0011]

Embodiments of the present invention will be described below with reference to FIGS. [Example 1] In this example, a bone (1a) injection-molded from the biodegradable synthetic resin described above is coated with coated paper (3a) (3b) made of biodegradable pulp paper. The present invention is applied to a method for manufacturing a round fan in the case of wearing it as a round fan.

As shown in FIG. 1, the skeleton (1a) is fitted into the tip of a handle (2) which is formed separately from the skeleton (1a), and these are separately injection-molded. Then, in order to enable these connections, from the frame body (11) formed at the end of the bone body (1a), a fitting shaft portion (21) as a handle attachment portion is formed to project, The fitting shaft is attached to the tip of the handle (2).
A fitting hole (22) for accommodating the (21) is formed.

The fitting shaft portion (21) and the fitting hole (22) are secured in such a state that the fitting portion is prevented from coming off.
Has a pair of small protrusions (23) (23) and a slit (25) formed between them, and the other fitting hole (22) has through holes (24) (24) into which they are fitted. In the connected state, the protrusions (23) and the through holes (24) are engaged with each other, as shown in FIG.

In the skeleton (1a), the frame body (11) continuing from one end of the fitting shaft portion (21) is composed of a pair of arcuate sides facing each other. A plurality of branch bones (13, 13) are radially extended from the inner arcuate bar (12). And
As shown in FIG. 1, the planar shape of each branch bone (13) is gradually flattened and widened from its tip toward a connecting portion with the arcuate bar (12). The width of the ribs (13) is set wider than that of a conventional synthetic resin skeleton, and the total number of ribs (13) (13) is 10% more than that of the conventional ribs. It is getting less.

Further, the distal ends of the ribs (13) (13) are connected by a connecting piece.
It is integrally connected by (14). This connecting piece (14)
Is composed of both left and right side parts, a horizontal side part located on the tip side of the skeleton (1a), and a slanted side part connecting between these parts, and has a substantially rectangular shape as a whole. Coated paper (3a) (3b)
As shown in FIG. 2, the whole is substantially rectangular and is set to be slightly larger than the range surrounded by the connecting piece (14) and the arcuate bar (12) in the skeleton (1a). And these coated paper (3
a) The upper sides of (3b) are bonded together. The side opposite to the adhesive side (32) is an arcuate portion (31) that matches the arcuate bar (12). As shown in FIG. 4, the adhesive side (32) is connected to the connecting piece (14). When contacted with the horizontal side, the arcuate portion (31) has a dimensional relationship with the outer periphery of the arcuate bar (12).

Next, the skeleton (1a) having the above construction is covered with the coated papers (3a) (3
The step of attaching b) will be described in detail below. First, FIG.
As in (A), the bone body (1a) is passed through a region where water is sprayed from the nozzle (N), and water is sprayed to the surface of the bone body (1a) to a predetermined degree. Then, the sprayed area on this surface partially melts and becomes a paste, and the bone body in this state
The coated paper (3a) (3b) is coated on (1a) so that the adhesive side (32) and the horizontal side of the connecting piece (14) are in contact with each other as shown in FIGS. 3 (B) and 4.

After that, a plurality of portions of the connecting piece (14) near the bonding side (32) are clamped by a heating and pressing tool (5) as shown in FIG. In this heating / pressurizing tool (5), the tips of a pair of clamping rods (52) (52) that can be opened and closed by the levers (51) (51) face each other, and these clamping rods (52) (52) The heaters (53) (53) are equipped with the pinching rods (52) (52), and the tip ends thereof are maintained at a predetermined temperature.

When the connecting piece (14) whose surface is in the molten state is heated and pressed by the tip portion, the pressed portions (33) (33)
With the coated paper (3a) and the coated paper (3b) are partially adhered,
The coated papers (3a) and (3b) are accurately and temporarily fixed to the adhered portion of the bone body (1a). After this, as shown in FIG. 3- (C), a pair of heat plates with heat-resistant elastic plates (42) (42) such as silicon rubber attached to the inner surface.
(41) (41) between the bone body (1a) and the coated paper (3a) (3b) in the above state
And the heating plates (41) and (41) are interposed between them. Then, the coated papers (3a) and (3b) are pressed against the surfaces of the ribs (13) and (13) and the connecting piece (14), and are heated to a predetermined temperature by the heaters (43) and (43). By the heating action of the elastic plates (42) (42), the coated papers (3a) (3b) are bonded to the ribs (13) (13) and the connecting piece (14) as shown in FIG. That is, as shown in the figure, the fused portions (13a) (13a) on both the front and back surfaces of the branch bone (13) are dried to form an adhesive structure in which the coated papers (3a) (3b) are adhered.

The heating and pressurizing device is described in Japanese Examined Patent Publication 1-40601.
Similar to that disclosed in No. 4, but with the elastic plates (42) (4
2) may be thinner than that of this known technique. This elastic plate
This is because it is not necessary to press the coated papers (3a) and (3b) until they are in contact with each other. After the above bonding, trimming is performed as shown by the one-dot chain line in FIG. 4 to complete the fan portion. When the handle (2) is fitted to the fitting shaft portion (21) of the fan portion, a fan as shown in FIG. 6 is obtained. .

In the above embodiment, since the handle (2) is constructed as a separate body, water is sprayed only on the bone body (1a) in the spraying process shown in FIG. Of the melted area by spraying, the area not covered by the coated paper (3a) (3b) in the round fan completed state is minimized, and by this,
It can eliminate the unsightly appearance. Then, if the range from the arcuate bar (12) to the fitting shaft portion (21) is covered in the spraying step, the melting area will be completely covered, and thus the effect will be further improved. .

The handle (2) does not necessarily have to be formed separately. In this case, as described above, if the water is sprayed only on the coated areas of the coated papers (3a) and (3b), the above effect is secured. Further, the shape of the skeleton (1a) is not limited to the above-mentioned one, and the frame (11) has a handle as shown in FIG.
(2) Alternatively, it may be configured by only arcuate bars connected to the handle mounting portion, and the ribs (13) and (13) radially extend from the arcuate bars. In this case, the entire area other than the arcuate crosspiece is covered with the covering paper.

At the time of the attachment, as shown in FIG. 9, water is sprayed on the coated paper, and the coated paper is dried.
You may make it adhere | attach by heating and pressurizing to (1a). Furthermore,
The method carried out above can be carried out not only in the production of fan but also in the production of kite, for example. In this case, the sheet may be attached only to one side of the skeleton. [Example 2] In this example, a packaging container (1b) for dry foods was molded from the biodegradable synthetic resin described above, and a product description and The present invention is applied to a method of sticking a card body (3c) of similarly biodegradable pulp paper for demerit indication and the like.

As shown in FIG. 10, the packaging container (1b) is formed so as to open upward and has a rectangular shape as a whole, and the upper end of the packaging container (1b) following the body portion (18) of the packaging container (1b). A flange portion (17) is formed on the outer peripheral side so as to project, and a lid is attached to the flange portion (17) so that the lid is just fitted. A rectangular concave portion (19) adapted to the shape of the card body (3c) is formed at the center of a predetermined surface of the body portion (18). ), The card body (3c) is just fitted.

The card body (3c) is made of pulp paper in the form of a plate. The card body (3c) is provided with the above-mentioned display by printing, and the back surface of the display unit is It serves as an adhesive surface (35) to the packaging container (1b). In addition, after the dimensional relationship between the card body (3c) and the recessed portion (19) is set to a predetermined value, after being pressed and heat-bonded by the hot plate (4) and the holding mold (6) described later, The surface of the card body (3c) and the outer peripheral surface of the body portion (18) are aligned with each other.

Next, the card body (3c) is placed in the packaging container (1b).
The step of sticking will be described below. First, FIG.
As shown in Fig. 4, the card body (3c) is passed through the spraying device in the same manner as in Example 1 with the adhesive surface (35) facing the nozzle (N), and then the adhesive surface (35) is attached to the adhesive surface (35). A predetermined amount of water is sprayed.

After this, the concave portion (19) of the packaging container (1b)
In, when the card body (3c) is fitted, the bottom surface of the concave portion (19) facing the adhesive surface (35) is melted into a paste, and the card body (3c) is placed in the concave portion (19). Are glued together. And FIG.
As shown in Fig. 6, a holding mold (6) with the shape of the upper surface adapted to the shape of the recessed part (19) in the packaging container (1b), and this holding mold
It is located above (6) and the shape of the lower end face is the card body (3c)
Between the hot plate (4) set slightly smaller than that of
Recessed part (19) and card body (3c) of the packaging container (1b) in the above state
Are interposed and these are pinched. At this time, the hot plate
Since (4) is heated to a predetermined temperature by the heater (43), the adhesive portion between the concave portion (19) and the card body (3c) is dried, and the card body to the packaging container (1b) is dried. The sticking of (3c) is completed.

In the above embodiment, water is sprayed on the adhesive surface (35) of the card body (3c), but this is sprayed only on the concave portion (19) of the packaging container (1b). The above-mentioned attachment is also possible by spraying and bringing the dry card body (3c) into contact therewith. Further, the sheet (3) is not limited to the above-mentioned pulp paper and may be any one having biodegradability.

[Brief description of drawings]

FIG. 1 is a bone body (1a) and a handle manufactured according to an embodiment of the present invention.
Exploded view of (2)

FIG. 2 is a perspective view of the coated paper (3a) (3b)

FIG. 3 is an explanatory view of a coated paper attaching step.

FIG. 4 is a plan view showing a state in which the coated papers (3a) and (3b) are temporarily fixed to the bone body (1a).

FIG. 5 is an explanatory view of a process of temporarily fixing the coated papers (3a) and (3b) to the bone body (1a).

FIG. 6 is a plan view showing a state in which the coated papers (3a) and (3b) are attached to the bone body (1a).

FIG. 7 is a sectional view taken along line XX.

FIG. 8: Bone body (1a) when the frame body (11) has only arcuate bars
Illustration of

FIG. 9 is an explanatory view of a main part of another method for attaching the coated papers (3a) and (3b)

FIG. 10: Packaging container (1b) and card body in Example 2
(3c) Sticking explanatory perspective view

FIG. 11 is an explanatory view of a process of spraying water on the card body (3c).

FIG. 12 is an explanatory view of a main part of a process of pressing and heating the pasting part with the heating plate (4) and the holding mold (6).

[Explanation of symbols]

 (1) ・ ・ ・ Substrate (3) ・ ・ ・ Sheet

Claims (3)

[Claims] 1. A method for sticking a similar sheet to a base material made of a synthetic resin having biodegradability, wherein the base material (1) is made of a biodegradable synthetic resin containing starch as a main component. At the same time, the sheet (3) is made to have biodegradability, and the surface layer part of the sticking range of the base material (1) is melted with water, and the base material (1) and the sheet (3) are melted. A method of sticking a sheet to a synthetic resin base material, wherein the sticking areas are in contact with each other, and the molten portion of the base material (1) is cured in this state. 2. The substrate (1) or the sheet (3) is adhered to either one of the respective sticking ranges so that they are in contact with each other in a state of being wet with water, The method for attaching a sheet to a synthetic resin substrate according to claim 1, wherein the surface layer portion in the attaching range of (1) is in a molten state. 3. The fused part of the base material (1) is heated and dried in the contact state of the respective attachment ranges of the base material (1) and the sheet (3). A method for attaching a sheet to a synthetic resin substrate.