JPH06239516A - Transcription tool - Google Patents

Abstract

PURPOSE:To improve the rigidity, processing accuracy and heat resistance of a case, in which transcription tapes are stored, and reduce poisonous gas generating quantity at the time of scrapping by incineration. CONSTITUTION:A case, in which transcription tapes are stored in a playable manner, is formed of compositions mainly composed of a thermoplastic resin and a pulp. Thus the rigidity, processing accuracy and heat resistance of the case itself, which is an important function among those of the transcription tapes, can all be improved and, due to reduction of the amount of resin used, reduction of poisonous gas generating quantity at the time of scrapping by incineration, lessening of incineration residue and improvement of heat of combustion can be aim at, as compared with the case of forming the case with a thermoplastic resin only. Moreover, the productivity of about an equal degree as that of cases manufactured by only a thermoplastic resin can be mainatained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink ribbon cassette equipped with an ink ribbon for printing on recording paper or the like, or to easily erase characters or images formed on a transfer surface of recording paper or the like. The present invention relates to a transfer tool in which a transfer tape is movably stored in a case, such as a correction tape holder having a correction tape mounted thereon.

[0002]

2. Description of the Related Art As a transfer tool mentioned at the outset, there is a box-shaped one in which the entire case is made of a hard resin (for example, acrylonitrile / butadiene / styrene copolymer (hereinafter referred to as ABS resin)). In this case, there is a problem that a large amount of harmful gas is generated and the incinerator is easily damaged when the unnecessary resin ink ribbon cassette case is incinerated and discarded. Therefore, in order to solve such a problem at the time of incineration and disposal, conventionally, a case is constructed by folding a sheet of paper-based plate material into a U-shape (Japanese Patent Laid-Open No. 61-12384). (See the official gazette), a case formed by joining two upper and lower divided cases formed by stacking paperboard or corrugated cardboard with an adhesive or the like in the ribbon width direction (see Japanese Utility Model Laid-Open No. 64-17758), It has been proposed to add an inorganic filler (calcium carbonate, talc, etc.) to the resin, which is the molding material, to reduce the amount of resin used on a case-by-case basis.

[0003]

However, in the conventional case in which a sheet of paper-based plate material is bent in a U-shape to form a case, the case is easily deformed. Therefore, when the transfer tool is stored and transported, the transfer tool must be separately stored in a box having a high shape retention property, which increases the material cost. In particular, when the transfer tool is an ink ribbon cassette, if the case is deformed before being attached to the printer, it cannot be attached to the printer in a predetermined posture, or even if it can be attached to the printer, the running posture of the ink ribbon Printing defects are likely to occur due to irregularities in the printing. In the conventional case where a case is formed by stacking paperboard or corrugated paper, the entire case is made of paper, and more than one piece of paper is joined with an adhesive, so sufficient strength and shape retention are achieved. In addition to not being able to obtain good performance, there are also problems in mass production. Furthermore, the conventional method of mixing an inorganic filler with a resin that is a molding material for a case causes another problem that a large amount of residue is generated when the case is incinerated and discarded. The present invention has been made in view of the above circumstances, and by devising the molding material of the case, while increasing the rigidity, processing accuracy, and heat resistance of the case itself, the harmful gas generation amount at the time of incineration disposal It is an object of the present invention to provide a transfer tool that can reduce the amount of waste, reduce the amount of incineration residue, and improve the amount of heat of combustion, and that is excellent in productivity.

[0004]

In order to achieve the above object, in the transfer device according to the present invention, a case for accommodating a transfer tape having a transfer coating film on one side so that the transfer tape can run is provided.
It is characterized in that it is molded with a composition mainly composed of a thermoplastic resin and pulp, and the following operational effects are obtained from such a constitution.

[0005]

By molding the case with the composition mainly composed of the thermoplastic resin and the pulp, as is apparent from the test data shown in [Table 1], compared with the case where the thermoplastic resin alone is molded. The mechanical strength such as tensile strength, bending strength, Rockwell hardness, etc. and heat resistance required for the case can be improved, and the molding shrinkage ratio can be reduced. Furthermore, the same thermoplastic resin can be used. When used, it is possible to reduce the heat of combustion by mixing pulp. Moreover, not only can the amount of resin used in each case be reduced by using pulp, but the rigidity of the case itself can be increased by improving the mechanical strength, so it is possible to reduce the thickness of the case by that amount. This makes it possible to further reduce the amount of resin used. In addition, the amount of incineration residue can be reduced as compared with the conventional inorganic filler compounding method, and mass production with a molding die is possible as in the case of molding the thermoplastic resin alone.

[0006]

Therefore, by devising the molding material of the case as described above, the rigidity and processing accuracy of the case itself, which is an important function among the transfer tools, can be improved as compared with the case where only the thermoplastic resin is molded. While increasing both heat resistance, by reducing the amount of resin used in each case, it is possible to reduce the amount of harmful gas generated during incineration disposal, reduce the amount of incineration residues, and improve the combustion heat quantity. It is easy to secure the same level of productivity as that produced by using the thermoplastic resin alone.

Further, as described in claim 2 of the present invention, the thermoplastic resin is a polyolefin type, a polystyrene type, a polyester type, a polyvinyl alcohol derivative,
When it is composed of a mixture of one or more of acrylic resins, these are composed of the three elements of carbon C, hydrogen H, and oxygen O, so the generation of harmful gas during incineration disposal Can be prevented as much as possible. Among the above-mentioned polyolefin-based materials, polypropylene is particularly preferable because it has the following effects. That is, since polypropylene has physical properties superior to heat resistance in comparison with ABS resin and polystyrene, as is clear from the test data shown in [Table 1], when considering only the heat resistance, polypropylene is particularly suitable. It is effective as a molding material when is an ink ribbon cassette mounted in a printer. That is,
The ambient temperature around the print head of the printer is 60 ° C ~
Since the temperature is 70 ° C, the heat resistance as a molding material is 110
It is preferable that the temperature is above ° C, but the heat resistance of polypropylene is sufficient even under the conditions of use. However, polypropylene is inferior in terms of mechanical strength such as tensile strength and bending strength, and processing accuracy (large molding shrinkage), so in practice,
It has been used for a part of the ink ribbon cassette that does not require accuracy and strength, and most of it, including the main part of the ink ribbon cassette, has high heat resistance and is a high-grade ABS.
Resin (for example, Stylak A manufactured by Asahi Kasei Corporation)
For BS, heat resistance grade 18 with heat resistance of 110 ° C or higher
It is the current state that molding is performed using 0 to 185).
Therefore, by molding the case with a composition mainly composed of polypropylene and pulp, not only the heat resistance, which is a characteristic of polypropylene, can be further enhanced, but also the mechanical strength such as tensile strength, bending strength, and Rockwell hardness can be improved. The mechanical strength can be improved to almost the same level as the ABS resin, and the molding shrinkage can be reduced. In other words, by effectively utilizing polypropylene that has been disqualified up to now as a molding material for the ink ribbon cassette, it is possible to manufacture an ink ribbon cassette that requires high heat resistance, processing accuracy, and rigidity in terms of manufacturing cost. it can. In particular, as described in claim 3 of the present invention, when the pulp is blended in the range of 30 to 55 parts by weight in 100 parts by weight of the composition, while suppressing a decrease in yield due to defective molding. It is possible to mass-produce ink ribbon cassettes with excellent heat resistance, processing accuracy, and rigidity. Furthermore,
When the thermoplastic resin is polypropylene, polyethylene, or polystyrene, the waste can be recovered as petroleum, so that the recycling of the waste can be promoted.

[0008]

EXAMPLES As an example of a transfer tool, there are various shapes of ink ribbon cassettes used in word processors, printers, etc. However, a general ink ribbon cassette has a substantially concave contour when viewed in the ribbon width direction. In the case to be presented, a delivery core having an ink ribbon with a transfer coating film on one side wound in a pancake shape, a take-up core for taking up the printed ink ribbon in a pancake shape, and a delivery core from the delivery core. A plurality of guide rollers for guiding the formed ink ribbon to the winding core via a portion corresponding to the print head is provided. In the present invention, the case is injection-molded with a composition containing 70 parts by weight of polypropylene and 30 parts by weight of pulp, which is an example of a thermoplastic resin. As the pulp, cellulose fiber, waste paper, wood powder, sawdust, etc. can be used alone or in combination, but are not limited thereto. As the thermoplastic resin, polyethylene, polyvinyl chloride, polystyrene, acrylonitrile / styrene copolymer, ABS resin and the like can be used in addition to polypropylene, but the thermoplastic resin is not limited to these. In particular, when the thermoplastic resin is composed of one or a mixture of a polyolefin-based resin, a polyester-based resin, a polyvinyl alcohol derivative, and an acrylic-based resin, these are three kinds of carbon C, hydrogen H, and oxygen O. Since it is composed of elements, it is possible to prevent the generation of harmful gas during incineration and disposal as much as possible.

The method for producing the composition will be described below [Table 1].
Will be described based on the manufacturing examples (numbers 1 to 11) shown in
The present invention is not limited to these. [Production Examples 1 to 4 and 6 to 7] Hardwood bleached pulp having a water content of 0.5% or less and polypropylene (PP) as a thermoplastic resin are mixed at a ratio shown in [Table 1]. . Next, this mixture is kneaded with a kneader, formed into a sheet by a hot roll, and then pelletized using a pelletizer. [Production Example 5] Pelletization was performed in the same production process as in Production Example 1 except that pulp was not used. [Production Examples 8 and 10] Pelletization was performed in the same production process as in Production Example 5, except that ABS resin (ABS) or polystyrene (PS) was used instead of polypropylene (PP). [Production Example 9] In Production Example 2, polypropylene (P
Pelletization was performed in the same manufacturing process except that ABS resin (ABS) was used instead of P). [Production Example 11] In Production Example 1, polypropylene (P
Pelletization was performed in the same manufacturing process except that polystyrene (PS) was used instead of P).

[Evaluation method] Tensile strength: JIS K7113 (No. 1 injection molding, thickness 3 mm, speed 10 mm / min Bending strength: JIS K7203 (standard injection molding) Rockwell hardness: JIS K7202 (R scale) Heat resistance : JIS K7207 (B method) Molding shrinkage ratio: Mold size difference of square plate injection molded product by film gate Combustion heat quantity: Bomb calorimeter (constant volume combustion heat)

Then, test pieces were molded from the pellets manufactured in each of the above-described manufacturing examples by a known molding method, physical properties of these test pieces were examined, and the test results are shown in the following [Table 1].

[0012]

[Table 1]

Considering the test results of [Table 1], in Production Examples 1 to 6, the physical properties (tensile strength, bending strength, Rockwell hardness, heat resistance) of the present invention in which pulp was blended were more than those of polypropylene alone. Properties, molding shrinkage, etc.), and particularly, pulp is 30 parts by weight in 100 parts by weight of the composition.
In the case of Production Examples 1 to 4 which are compounded in the range of up to 55 parts by weight, the respective physical properties are remarkably improved. In addition, Production Examples 8 to 9
Even in the case of the ABS resin or the polystyrene of Production Examples 10 to 11, the physical properties of the present invention in which pulp is blended are improved as compared with those resins alone. Incidentally, in claim 3 of the present invention, pulp is added in an amount of 30 to 55 in 100 parts by weight of the composition.
If the amount is less than 30 parts by weight, no significant improvement in physical properties can be obtained, and if the amount is less than 30 parts by weight.
This is because if it exceeds 5 parts by weight, the possibility of causing defective molding becomes high.

Other Embodiments a. In the above-described embodiments, the transfer tool is described by taking an ink ribbon cassette in which an ink ribbon for printing on recording paper or the like is mounted as an example, but the technique of the present invention is applied to a transfer surface such as recording paper. Of course, the present invention can be applied to a correction tape holder or the like in which a correction tape for easily covering and erasing formed characters and images is mounted so as to be able to run. In addition, as the transfer tape, there are those which are provided with thermal transfer ink, pressure-sensitive transfer ink and the like on one side and those which are impregnated with liquid ink, and it is preferable to select and use them appropriately according to the purpose of use. In short, the transfer tool targeted by the present invention may have any structure as long as the transfer tape is accommodated in the case so that the transfer tape can run.

A. In each of the embodiments described above,
Although a composition mainly composed of a thermoplastic resin such as polypropylene and pulp was injection-molded, the delivery core, the take-up core, the guide roller, etc., which are constituent members other than the case, may be injection-molded with the same composition.

C. In each of the above-described embodiments, the case is divided vertically at the center position in the ribbon width direction, but this division position is not limited to the center position in the ribbon width direction. You may comprise from.

D. As another thermoplastic resin, a biodegradable resin such as polyester, polyamide, or a polyvinyl alcohol derivative may be used, and further, a lubricant or an antistatic agent may be added to the composition. You may. In particular, when the thermoplastic resin is polypropylene, polyethylene or polystyrene, the waste can be recovered as petroleum.

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroaki Moriyama 5-4-14 Minejima, Nishiyodogawa-ku, Osaka City, Osaka Prefecture Fujikopian Co., Ltd. Technical Center (72) Masahiko Ono 5-chome, Minejima 4-chome, Nishiyodogawa-ku, Osaka City, Osaka Prefecture No. 14 Fujikopian Co., Ltd. Technical Center (72) Inventor Ryoichi Shimazaki 5-4-14 Minejima, Nishiyodogawa-ku, Osaka City, Osaka Prefecture Fujikopian Co., Ltd. Technical Center

Claims (3)

[Claims] 1. A transfer tool in which a transfer tape is movably accommodated in a case, wherein the case is molded with a composition mainly containing a thermoplastic resin and pulp. 2. The thermoplastic resin is a polyolefin type,
The transfer tool according to claim 1, which is composed of one or a mixture of a plurality of polystyrene resins, polyester resins, polyvinyl alcohol derivatives, and acrylic resins. 3. The transfer tool according to claim 1, wherein the pulp is mixed in an amount of 30 to 55 parts by weight in 100 parts by weight of the composition.