JPH11267372A - Forming sheet made of vulcanized fiber and method for producing molded product using the sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaping sheet suited for use as hobby material or teaching material for amateurs and schoolchildren. SOLUTION: This shaping sheet is made from vulcanized fibers having a water absorption coefficient of about 15 to 17% when immersed in water for about 10 to 120 seconds, selected from vulcanized fibers which meet requirements that thicknesses are in the range of 0.18 to 0.35 mm and that water absorbing capacities per hour are in the range of 61 to 68%. A method for manufacturing a vulcanized fiber shaping includes immersing the shaping sheet in water for about 10 to 120 seconds, pulling up the sheet from the water to maintain a water absorption of about 15 to 17%, manually shaping the sheet in that state into the required shape to obtain a shaping, and drying the shaping.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding sheet made of vulcanized fiber, which is suitable as a material for producing various interior decorations such as paper art flowers and paper art animals.

[0002]

2. Description of the Related Art The present applicant has developed a "sheet for forming and processing origami and interior decoration articles" disclosed in Japanese Patent Publication No. 63-25960 using vulcanized fiber, and provided it as a teaching material and a hobby material. Have gained.

[0003] A sheet for molding using vulcanized fiber described in the above-mentioned publication (hereinafter, referred to as "conventional product")
Has a thickness of 0.20 to 0.20 as described in the publication.
It is made of vulcanized fiber having a range of 0.50 mm (inside) and a water absorption of 30 to 60% per hour (inside).
Plasticization when immersed for 30 minutes, removal from the water, and wiping off moisture adhering to the outer surface enables free-hand processing, enabling molding into a desired form and holding the desired form after molding After being air-dried for about 30 minutes in this state, an impact-resistant molded article having high rigidity and elasticity can be obtained.

[0004]

The conventional product needs to be immersed in water for a long time of 15 to 30 minutes to obtain the required flexibility, and has a relatively large thickness of 0.40 to 0.50 mm. In the case of a thick sheet, the immersion time of 15 to 30 minutes gives sufficient flexibility to allow manual processing, but on the other hand, it has a large restoring force and maintains the desired shape formed by the completion of drying. To do so, various fixing jigs such as clips and rubber bands were required.

[0005] Even in the conventional product, the thickness is 0.20.
In the case of a sheet having a relatively small thickness of about 0.30 mm, since the restoring force is small, it is possible to maintain a desired form formed by processing until the drying is completed without using the various fixing jigs.

[0006] When the conventional product is used, 15 to 3
Since a immersion time of 0 minutes and a drying time of about 30 minutes are required, there is a problem that it takes a long time to complete a molded product, and a material having a thickness of 0.40 to 0.50 mm is used. In such a case, since a fixing jig is required at the time of drying, there is a problem that molding processing is difficult for beginners and elementary school students.

The inventor of the present invention has made it a technical problem to solve the above-mentioned problems, and can reduce the immersion time and the drying time as much as possible, and it is very easy to perform a molding process by hand. In order to provide a molding sheet made of vulcanized fiber that is not required, the thickness and water absorption of the vulcanized fiber used as the molding sheet have been subjected to numerous trial and error experiments and trial production. Within the range of 18 to 0.35 mm and 1
When vulcanized fiber having a water absorption of about 15 to 17% when immersed in water for about 10 to 120 seconds from among vulcanized fibers having a water absorption per hour in the range of 61 to 68%, water is used. About 10-12
Only by immersion for 0 seconds, processing with hands becomes free, and it can be formed into a desired form very easily.
The present invention has achieved a remarkable new finding that coloring with a watercolor paint becomes possible by natural drying for 0 minutes, high rigidity and elasticity, and impact resistance is imparted.

[0008] In the above-mentioned publication, a thickness of 0.50 mm and a thickness of 1
An example in which vulcanized fiber having a water absorption rate of 30% per hour is immersed in water for 30 minutes to carry out molding processing. Vulcanized fiber having a thickness of 0.20 mm and a water absorption rate of 35% per hour is added to water for 15 minutes. An example in which the vulcanized fiber having a thickness of 0.50 mm and a water absorption rate of 60% per hour is immersed in water for 15 minutes to perform the molding is shown. ing.

[0009]

The technical problem can be solved by the present invention as described below.

That is, the first aspect of the present invention is that the thickness is 0.18.
Water absorption rate within the range of ~ 0.35mm and per hour 6
This is a molding sheet made of vulcanized fiber having a water absorption of about 15 to 17% when immersed in water selected from vulcanized fiber satisfying a condition of 1 to 68% for about 10 to 120 seconds.

A second aspect of the present invention is that the thickness is 0.18 to
Water absorption rate per hour within the range of 0.35 mm 61
A sheet for forming processing comprising a vulcanized fiber having a water absorption of about 15 to 17% when immersed in water selected from vulcanized fibers satisfying the condition of about 68% to about 10 to 120 seconds is applied to water for about 10 to 120%. 120
After dipping for 2 seconds, it is pulled up from the water and the water absorption is about 15-17.
%, And in this state, a molded product is formed by hand in a desired form to obtain a molded product, and the molded product is dried, and is a method for producing a vulcanized fiber molded product.

The configuration and effect of the present invention will be described below in detail.

First, the vulcanized fiber in the present invention means that a base paper mainly composed of natural fibers is treated with a concentrated solution of zinc chloride (Be'71.4) to gel the fibers (gelation).
It is a well-known vulcanized fiber obtained by letting, winding, drying, pressing and the like, and having a thickness of 0.13 to 0.50.
mm, and the water absorption per hour is 48.6-8.
Those in the range of 5.1% are commercially available.

The sheet for forming according to the present invention includes:
From the above-mentioned commercial products, the conditions satisfying the conditions of a thickness of 0.18 to 0.35 mm and a water absorption rate of 61 to 68% per hour are satisfied, and further, it is immersed in water for about 10 to 120 seconds. A vulcanized fiber having a water absorption of about 15 to 17% at this time may be selected.

The sheet for forming process according to the present invention, which is selected from the commercially available vulcanized fibers, is immersed in water (about 20 ° C.) for about 10 to 120 seconds for about 15 to 17%. Of water absorption,
When pulled up from the water, in a state where the water absorption is maintained (undried state), flexibility that can be easily bent by hand is imparted, and a fixing jig is used after forming into a desired form. If it is left indoors (approximately 25 ° C.) and dried naturally for about 3 to 10 minutes, the desired color can be obtained without smearing the paint, even if it is colored using watercolor paint, and high rigidity and elasticity can be obtained. The resulting molded article has the impact resistance it has.

Next, Table 1 shows the results of a water absorption test on various commercially available vulcanized fibers conducted by the present inventors. The water absorption test was performed by measuring the weight of each test piece obtained by cutting various commercially available vulcanized fibers into a size of 100 mm x 100 mm using a precision weighing scale (model name: B-416, manufactured by Sartorius). About 20 ℃
Immersed in water for a predetermined time and lifted up. The water droplets adhering to the surface were wiped off with blotting paper, measured again using the same weighing scale, and the water absorption was calculated from the weight values before and after immersion.

[0017]

[Table 1]

According to the experiment and trial production results of the present inventors, Table 1
Each of the vulcanized fibers having a thickness of 0.40 and a thickness of 0.50 in the above cannot provide flexibility that enables molding by hand even if the immersion time in water is 120 seconds. Further, the vulcanized fiber having a thickness of 0.13 in Table 1 is very soft and has a so-called “stiffness” state even if the immersion time in water is 10 seconds, so that molding by hand is impossible. It is.

When the immersion time of the 0.13 thickness vulcanized fiber in water in Table 1 was changed to 1 second, 3 seconds, and 5 seconds, the water absorption was 22.4.
%, 35.2%, 43.5%, and even when immersed for 1 second, it has almost the same “stiffness” as tissue paper, making it almost impossible to mold with hands. On the other hand, when the immersion time of the 0.18-thick vulcanized fiber in Table 1 in water was changed to 1 second, 3 seconds, and 5 seconds, the water absorption was 9.1%,
11.6% and 12.1%, and when immersed for 5 seconds, sufficient flexibility was not provided so that molding by hand could be performed freely.

The inventor of the present invention has conducted the above-described water absorption test and
Through many experiments and trial productions, including trial productions, the new knowledge was obtained.

[0021]

Next, the most preferred embodiments of the present invention will be described.

0.20 mm thickness, water absorption per hour 6
A commercially available vulcanized fiber having a 7.7% water absorption of 15.7 to 33.0% when immersed in water for 10 to 120 seconds was used as a sheet for molding processing.

The above-mentioned sheet for forming process is cut out in advance as shown in FIG. 1 in consideration of the forming state (monkey doll), and the cut-out sheet 1 is placed in water at about 20 ° C. After dipping for 15 seconds and pulling up, the water droplets on the surface were gently wiped off with a towel, and then folded with a finger to obtain a structure shown in FIG.
After being formed into the shape of a monkey as shown in Fig. 7, it was left in a room at about 23 ° C and air-dried. It should be noted that the time required from the start of the bending operation to the time when the configuration shown in FIG. 2 was completed was about 7 minutes.

After about 4 minutes from the time when the apparatus is left indoors, it becomes a molded article having high rigidity and elasticity while maintaining the shape shown in FIG. 2, and the surface thereof is blurred even if it is colored with a watercolor paint. There was no problem, and a colored monkey doll molded product 2 was obtained.

When the obtained monkey doll molded article 2 was thrown on a concrete floor, it was confirmed that it was not deformed and had excellent impact resistance.

[0026]

[Function] The forming sheet used here is 10 to water.
The water absorption when immersed for 1 to 120 seconds is 15.7 to 33.
Since it is 0%, the water absorption rate during the above immersion time can be estimated to be about 16%.
It is dried sufficiently by natural drying in a short period of about 4 minutes in the room, and the original high rigidity and elasticity of the vulcanized fiber are restored, and excellent impact resistance is exhibited.

[0027]

The present invention will be described below in more detail with reference to Examples and Comparative Examples.

Example 1: A commercially available product having a thickness of 0.18 mm and a water absorption of 64.7% per hour and a water absorption of 15.1 to 9.2% when immersed in water for 10 to 120 seconds. Vulcanized fiber was used as a sheet for molding.

The above-mentioned sheet for forming process is cut out in advance as shown in FIG. 3 in consideration of the forming state (dog doll), and the cut-out sheet 3 is placed in water at about 20 ° C. After dipping for 10 seconds and pulling up, the water droplets on the surface were gently wiped off with a towel, and then bent with a finger to obtain a structure shown in FIG.
After being formed into the form of a dog as shown in Fig. 7, it was allowed to stand in a room at about 23 ° C and air-dried. It should be noted that the time required from the start of the bending operation to the time when the configuration shown in FIG. 4 was completed was about 7 minutes.

About three minutes after being left indoors, the molded article has high rigidity and elasticity while maintaining the shape as shown in FIG. 4, and the surface thereof is blurred even if it is colored with a watercolor paint. As a result, a colored dog doll molded product 4 was obtained.

When the obtained dog doll molded product 4 was thrown onto a concrete floor, it was confirmed that the dog doll molded product 4 was not deformed and had excellent impact resistance.

Example 2: A commercially available product having a thickness of 0.35 mm, a water absorption of 61.1% per hour, and a water absorption of 15.4 to 17.2% when immersed in water for 90 to 120 seconds. Vulcanized fiber was used as a sheet for molding.

The above-mentioned sheet for forming process is cut out in a developed state as shown in FIG. 1 in the same manner as in the embodiment of the present invention, and the cut-out sheet 1 is placed in water at about 20 ° C. for about 9 hours.
After dipping for 0 seconds and pulling up, the water droplets on the surface are gently wiped off with a towel, bent by hand, formed into a monkey form as shown in FIG. 2, and then left in a room at about 23 ° C. Air dried. It should be noted that the time required from the start of the bending operation to the time when the configuration shown in FIG. 2 was completed was about 10 minutes.

About 5 minutes after being left in the room, a molded article having high rigidity and elasticity is maintained in the state shown in FIG. 2, and the surface of the molded article is blurred even if it is colored with a watercolor paint. There was no problem, and a colored monkey doll molded product 2 was obtained.

When the obtained monkey doll molded product 2 was thrown onto a concrete floor, it was confirmed that it was not deformed and had excellent impact resistance.

Example 3 A commercially available product having a thickness of 0.25 mm, a water absorption of 67.8% per hour, and a water absorption of 15.3 to 25.7% when immersed in water for 40 to 120 seconds. Vulcanized fiber was used as a sheet for molding.

The above-mentioned sheet for forming process is cut out in a developed state as shown in FIG. 3 in the same manner as in Example 1, and the cut-out sheet 3 is immersed in water at about 20 ° C. for about 60 seconds and pulled up. After gently wiping off water droplets on the surface with a towel, bending the product by hand, forming it into the form of a dog as shown in FIG. 4, and leaving it in a room at about 23 ° C. to air dry. It should be noted that the time required from the start of the bending operation to the time when the configuration shown in FIG. 4 was completed was about 7 minutes.

Approximately 8 minutes after being left in the room, a molded article having high rigidity and elasticity is maintained in the state shown in FIG. 4, and the surface of the molded article is blurred even if it is colored with a watercolor paint. As a result, a colored dog doll molded product 4 was obtained.

When the obtained dog doll molded product 4 was thrown on a concrete floor, it was confirmed that it was not deformed and had excellent impact resistance.

COMPARATIVE EXAMPLE 1 A commercially available product having a thickness of 0.13 mm, a water absorption of 85.1% per hour, and a water absorption of 48.2 to 69.1% when immersed in water for 10 to 120 seconds. Vulcanized fiber was used as a sheet for molding.

In the same manner as in the embodiment of the present invention, the above-mentioned sheet for forming process is cut out in a developed state as shown in FIG. 1, and the cut-out sheet 1 is placed in water at about 20 ° C. for about 1 hour.
After dipping for 2 seconds and pulling it up, lightly wiping off water droplets on the surface with a towel, bending it by hand and trying to form it into the shape of a monkey as shown in FIG. 2, but the cut-out body had no waist and fluffy. Because of this state, it was impossible to mold it into a desired form.

Then, when it was left in a room at about 23 ° C. for about 30 minutes, it was a little hard, but it was hard to bend it into a desired form. Meanwhile, it was formed into a monkey shape as shown in FIG. The time required from the start of the bending operation using the hot air dryer to the time when the configuration shown in FIG. 2 was completed was about 40 minutes.

Also, after the forming process, it was allowed to dry naturally by leaving it in a room at about 23 ° C., but it was deformed when placed on a desk, so it was dried with cardboard and cellophane tape fixed. Needed.

Comparative Example 2: 0.40 mm in thickness, 57.5% of water absorption per hour, and 6.7 to 13.8% when immersed in water for 10 seconds to 120 seconds. A commercially available vulcanized fiber was used as a sheet for molding.

The sheet for forming process was cut out in a developed state as shown in FIG. 3 in the same manner as in Example 1, and the cut-out sheet 3 was immersed in water at about 20 ° C. for about 10 minutes. It was not possible to fold the dog in the form of a dog as shown in FIG.

[0046]

The sheet for molding according to the present invention has a thickness of about 2
By immersing in water of 0 ° C. for only a short time of about 10 to 120 seconds, any thickness of 0.18 to 0.35 mm is provided with flexibility that can be easily bent by hand at any thickness. Therefore, the preparation time for forming by hand is very short, and the water absorption in a state where the flexibility to bend very easily with hand is obtained is as low as about 15 to 17%. This has a great effect that the drying time is as short as 3 to 10 minutes.

Therefore, the sheet for forming process according to the present invention is suitable as a hobby material or teaching material for beginners and elementary school students, and thus it can be said that the industrial applicability of the present invention is very high.

[Brief description of the drawings]

FIG. 1 is a plan view of a sheet cutout for producing a monkey doll using a forming sheet according to the present invention.

FIG. 2 is a perspective view of a monkey doll molded product manufactured using the molding sheet according to the present invention.

FIG. 3 is a plan view of a sheet cutout for manufacturing a dog doll using the forming sheet according to the present invention.

FIG. 4 is a perspective view of a molded dog doll manufactured using the molding sheet according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet cutout for producing a monkey doll 2 Monkey doll molded article 3 Sheet cutout for producing a dog doll 4 Dog doll molded article

Claims (2)

[Claims] 1. Immersion in water selected from vulcanized fibers satisfying a condition of a thickness of 0.18 to 0.35 mm and a water absorption of 61 to 68% per hour for about 10 to 120 seconds. Water absorption rate of about 15 to 1
Forming sheet made of 7% vulcanized fiber. 2. The molding sheet according to claim 1, which is immersed in water for about 10 to 120 seconds and then pulled up from the water to a water absorption of about 15 to 17%. A method for producing a vulcanized fiber molded product, comprising: forming a molded product into a molded product; and drying the molded product.