JP3811667B2 - Cylindrical support and film or sheet winding method using the support - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylindrical support for winding a film or sheet, and a method for winding a film or sheet using the cylindrical support. In particular, it can be suitably used as a cylindrical support for a printing resin film or sheet.
[0002]
[Prior art]
Conventionally, in a rotary printing press using a film or sheet (hereinafter referred to as a roll) wound up in a spiral shape, it is connected to a new roll before the roll being printed disappears, and there is no interruption due to roll breakage. (For example, JP-A-6-171067, JP-A-7-232845, and JP-A-7-237792). Alternatively, a method is used in which a lead paper is pasted between rolls, passed through a printing line, and when the lead paper is in the printing machine, the printing position of the film or sheet is completely aligned before printing.
[0003]
[Problems to be solved by the invention]
In the former method, a slight deviation is likely to occur when the films or sheets are joined together, and the next roll immediately after the paster during the paster (transfer of the sheet or film from the roll being printed to the next new roll). There was a problem that a large misalignment occurred in the first printed part. Large image misalignment that occurred after roll change had to be gradually adjusted, and a large amount of defective printing was performed before the adjustment was completed, so there was a lot of waste and there was often a variation in the length of each product. . Therefore, when the product length has a standard like a carrier tape, it is difficult to apply the above method.
[0004]
On the other hand, when the latter method is used, since the lead paper is pasted between rolls and passed through the printing line, when there is lead paper in the printing machine, the sheet is printed after the printing position is completely aligned, Print defects are unlikely to occur in the film or sheet, and a constant film or sheet length after printing can be obtained. However, it is necessary to attach lead paper to a film or sheet in advance before printing. Although it is possible to attach the film or sheet and the lead paper by using a paper splicing method as described in JP-A-7-101603, it is very time-consuming. However, when there is a standard for the product length, such a method has been taken for many years because there is a merit in cost compared with a large loss due to the failure to obtain a product of the specified length.
[0005]
Therefore, an object of the present invention is a cylindrical support provided with lead paper in advance at the time of film or sheet production, and can be wound using a normal winding device at the time of film or sheet production. It is to provide a cylindrical support that can be manufactured at a very low cost without causing any trouble during the printing process, and a method of winding a film or sheet using the cylindrical support. .
[0006]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors have found that the tensile strength of the film or sheet is different between the winding process at the time of film or sheet production and the winding process at the time of printing. Then, by utilizing this difference in tensile strength, the lead paper is fixed to the cylindrical support at the time of manufacturing the film or sheet, and the film or sheet can be wound up in the same process as the normal cylindrical support. In addition, at the time of printing, the lead paper is automatically fed out, and a cylindrical support that can be used as a film or sheet with the lead paper, and a film, film, or sheet using the cylindrical support. The present invention was completed by a winding method.
[0007]
That is, the first present invention is a cylindrical support 1 for winding a film or sheet consisting of a core tube 2, a lead paper 3, an adhesive portion 4 and a score line 5,
a. The lead paper 3 is used to guide the film or sheet to the guide roll of the printing machine during printing.
b. The lead paper 3 is wound around the core tube 2,
c. The leading end portion of the lead paper 3 and the lower layer lead paper 3L are bonded by the bonding portion 4,
d. A joint 8 is provided on the surface of the leading end portion of the lead paper 3, and a film or sheet 6 is joined.
e. The cut line 5 was put in L between the end of the lead paper leading end portion of the adhesive portion 4a and the end of the lead portion 3b with the lower lead paper 3L.
A cylindrical support 1 in which a core tube 2 and lead paper 3 are integrated.
[0008]
2nd this invention is the said cylindrical support body 1 whose breaking strength of a score line is 1 N / m-50 N / m. 3rd invention is the cylindrical support body 1 which uses the raw material made from paper or a plastic as the lead paper 3. FIG.
[0009]
A third aspect of the present invention is a method for winding a film or sheet while rotating the cylindrical support 1 using the cylindrical support 1.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The material and size of the core tube 2 are not particularly limited as long as the core tube 2 has sufficient strength and functionality to wind up a film or a sheet. For example, it is made of paper (inner diameter is about 75 mm, outer diameter is about 92 mm) called a 3 inch paper tube generally used for winding sheets and films. Further, depending on the case, there is no problem even if it is made of plastic or metal.
[0011]
The lead paper 3 wound around the core tube is used to guide the film or sheet to the guide roll of the printing machine during printing, and needs to have a sufficient length. If the lead paper is too short, when the film or sheet is changed, the lead paper is lost before the printing position is aligned, and printing must be performed on the film or sheet with insufficient alignment. On the other hand, if the lead paper is too long, an extra time is required to feed out the lead paper, and the working efficiency is lowered. The appropriate length of the lead paper varies depending on the printing equipment and the number of colors to be printed, but 30 to 80 m is preferable in consideration of a general printing process.
[0012]
Since the lead paper 3 stays in the drying process at the time of printing alignment and may receive heat for a long time, sufficient heat resistance is required. Usually, since drying is performed at about 60 to 150 ° C., even general paper has sufficient heat resistance, but it is preferable to use a heat-resistant material particularly when passing through a high-temperature drying step. It is also possible to use a plastic material such as a biaxially stretched polyester film.
[0013]
Since the lead paper 3 receives the same tension as the film or sheet when passing through the printing press, it needs to have sufficient strength. When printing a 200μm about film or sheet, and more if it is often generally used paper or film of 20g / m ² ~150g / m ² about basis weight, to print than this thick film or sheet Since printing is performed with a strong tension, it is necessary to select one having higher strength.
[0014]
The width of the lead paper 3 is preferably almost the same as the width of the film or sheet or the width of the core tube 2 in view of printing misalignment and handling. The lead paper 3 needs to be bonded to the core tube 2 with sufficient strength. The adhesive strength is preferably 73 N / m or more, and more preferably 196 N / m or more. If the adhesive strength is insufficient, the film or sheet cannot be wound. As long as the adhesive strength is sufficient, any method such as a pressure-sensitive adhesive tape, an adhesive, or a double-sided tape may be used as the bonding method.
[0015]
The lead paper 3 of the present invention needs to be bonded to the lower lead paper 3L and the bonding portion 4 so as not to be peeled off again. Here, the non-removable adhesion means that it has an adhesive strength that can sufficiently withstand the tension during printing, and preferably has an adhesive strength of 73 N / m or more, more preferably 196 N / m or more. If the adhesive strength of the adhesive portion 4 is insufficient, the film or sheet may be peeled off when printing, and printing troubles such as breakage of the lead paper may occur.
[0016]
If the adhesive strength within the above range is obtained, the adhesive portion 4 does not need to be provided in the entire width of the tip portion, and can be provided at a certain interval in the lateral direction of the film or sheet. Further, the vertical width of the bonding portion 4 is not particularly limited as long as the adhesive strength within the above range can be obtained, but it is preferably formed in the range of 0.1 cm to 20 cm, more preferably 1 cm to 5 cm in the tip portion. Range. If the vertical width of the bonding portion 4 is too narrow, there is a risk of insufficient bonding, and if it is too wide, it is not economically preferable. Here, for convenience, the winding direction of the lead paper and the film or sheet is used as the vertical direction, and the direction perpendicular to the winding direction is used as the horizontal direction. Further, the tip portion refers to a band-like region extending 20 cm vertically from the lead paper tip portion 3a.
[0017]
Although the following three methods can be considered as a specific method of creating the score line 5 on the cylindrical support 1 of the present invention, the present invention is not limited to the following method.
[0018]
First, the first method is a method of forming a perforation on a part of the lead paper 3.
[0019]
The second method is a method in which a part of the lead paper 3 is scratched and the lead paper 3 is thinned.
[0020]
As shown in FIG. 4, the third method is a method in which a part of the lead paper 3 is cut, a breakable material 10 such as paper having a low basis weight is applied thereto, and the cut portion 9 is bonded.
[0021]
As shown in FIG. 6, the score line can be created between the end of the lead portion 4a of the lead paper and the end of the lead portion 3b with the lower lead paper 3L (length L shown in FIG. 2). Preferably, it is formed within a range of within 10 cm, more preferably within 5 cm, and most preferably within 2 cm from the end of the bonding portion 4b. This is because if the distance from the bonding portion 4b is wide, the perforation is less likely to break during feeding.
[0022]
The score line is preferably placed in the lead paper 3 in parallel with the central axis of the core tube 2. However, as long as the breaking strength of the score line 5 is within the above range, it may be inserted obliquely. Although it is preferable to make the score line over the entire width of the lead paper 3, the score line 5 may be made at regular intervals in the lateral direction of the lead paper 3 as long as the breaking strength is satisfied. Furthermore, it is preferable that only one cut line 5 is provided in the outermost layer of the lead paper 3. This is because if there are two or more places, there is a possibility that lead paper breaks during printing.
[0023]
Although the breaking strength of the score line depends on the tension at the time of printing, it is preferably 1/2 or less, more preferably 1/3 or less of the tension at the time of printing for smooth breaking. Usually, the tension applied to the film or sheet at the time of printing is 73 N / m to 196 N / m, and therefore the breaking strength range of the score line needs to be 50 N / m or less. On the contrary, when the breaking strength of the score line is too weak, it is not preferable because it breaks when the film or sheet is wound. Accordingly, an appropriate range of the breaking strength of the score line is 1 N / m to 50 N / m, preferably 1.5 N / m to 25 N / m, and more preferably 2 N / m to 15 N / m. If the breaking strength of the score line is within the above range, the score line can be wound without being broken when the film or sheet is wound, and when printing, it breaks from the score line and smoothly feeds the lead paper. Can do.
[0024]
The cylindrical support 1 of the present invention creates a joint 8 for joining a film or sheet to the outermost layer of the lead paper 3. However, if the joint portion 8 is created on the cut line 5, it will not break from the cut line at the time of printing. Therefore, at least the portion corresponding to the lead paper tip 3a direction from the cut line 5 needs to be the joint portion 8. In particular, it is preferable to form the joint 8 only at the tip of the lead paper 3.
[0025]
In addition, the joining portion 6 can be any material as long as it has sufficient adhesive strength, but since it needs adhesive strength that can sufficiently withstand the tension during printing, the lead paper 3 and film Alternatively, the sheet needs to be bonded with sufficient strength. The adhesive strength is preferably 73 N / m or more, and more preferably 196 N / m or more.
[0026]
The means for adhering the cylindrical support 1 and the lead paper 3 is not particularly limited, but the cylindrical support 1 and the lead paper 3 are preferably bonded with a double-sided tape. Although the vertical width | variety bonded using a double-sided tape will not be restrict | limited especially if the said adhesive strength is obtained, 1 cm-10 cm in a front-end | tip part are preferable. More preferably, it is the range of 2 cm-5 cm. If the width to be bonded is too narrow, there is a risk of insufficient bonding strength. On the other hand, if the bonding width is too wide, it is not economically preferable. Moreover, if the adhesive strength in the said range is obtained, it is not necessary to affix on the whole width of a front-end | tip part, and it can also affix at a fixed space | interval in the horizontal direction of a film or a sheet | seat.
[0027]
The method of winding up a film or a sheet using the cylindrical support 1 of the present invention is a normal cylindrical support after joining the leading end of the film or sheet and the joint 8 of the cylindrical support 1. Similarly to the case of winding using a film, a film, a film or a sheet can be wound while rotating the cylindrical support 1.
[0028]
【The invention's effect】
The cylindrical support of the present invention is provided with lead paper during film or sheet production, and does not require a rewinding process for applying lead paper during printing. Moreover, a cylindrical support that can be wound using a normal winding device at the time of manufacturing a film or sheet and can be manufactured at a very low cost, and the cylindrical support are provided. The present invention provides a method for winding a film or film or sheet. The cylindrical support and the method of winding a film, film or sheet can be suitably used for printing applications where a product with a certain printing length is required, for example, the product length is standardized.
[0029]
【Example】
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto. In addition, the breaking strength and adhesive strength of a score line were performed in accordance with the following method.
[0030]
(1) Break strength test of cut line The cut part was cut out, and a strip-shaped sample having a width of 20 mm was collected. Measurement was performed at a test speed of 50 mm / min using A & D Tensilon, and the breaking strength of the cut was measured.
[0031]
(2) 180 degree peeling test It measured as a test speed of 50 mm / min by the measuring method according to JIS-K-6854, and the adhesive strength measurement was performed.
[0032]
Example-1
As shown in FIG. 2, a paper cylindrical support manufactured by Yoneya Paper Tube Co., Ltd. (core tube 2; inner diameter 76 mm, thickness 10 mm), and kraft paper manufactured by Daio Paper Co., Ltd. (lead paper 3; basis weight 80 g) / M ² ) end portion 3b was joined using a double-sided tape (manufactured by Teraoka Seisakusho Co., Ltd .: product number No. 7644), and lead paper 3 was wound around core tube 2 by 60 m 4.
[0033]
A cut line 5 (perforation) having a breaking strength of 1.5 N / m was created in the lead paper 3 at a location 1 cm from the end of the adhesive portion 4b of the lower lead paper 3L. An adhesive (adhesive strength 196 N / m) was applied to the back surface of the leading end portion of the lead paper 3 of the cylindrical support 1 over the entire width of the lead paper to create an adhesive portion 4. Next, in order to join the sheet 6 as shown in FIG. 3, a double-sided tape (manufactured by Teraoka Seisakusho Co., Ltd .: product number No. 7644) is applied to the entire surface of the front end portion of the cylindrical support 1 and joined. Part 8 was created.
[0034]
Using this cylindrical support 1, a sheet having a thickness of 0.25 mm, a width of 1 m, and a length of 800 m was wound up in the same manner as a normal cylindrical support. A cross-sectional view of the joint 4 and the film or sheet 6 at this time is shown in FIG. As shown in FIG. 5, the winding to the cylindrical support was not peeled off, and as in the case of a normal cylindrical support, wrinkles and unevenness did not occur and could be smoothly performed. Further, when this roll was used for printing, as shown in FIGS. 7 and 8, the lead paper was broken from the score line 5 and the lead paper was smoothly fed out. The broken portion 7 broken by the score line did not particularly affect the printing. Therefore, since the printing of the sheet portion is completed and the printing is stopped in a state where the lead paper has passed through the printing machine, the sheet can be replaced and aligned, so that the length of the printed sheet is constant. I was able to get something.
[0035]
Comparative Example-1
In the same manner as in Example-1, a cylindrical support 1 in which 60 m of lead paper was wound was obtained. Without forming the score line 5 on the lead paper 3, the lead paper 3 was joined to the entire width of the front end portion using the adhesive. Then, a double-sided tape (manufactured by Teraoka Seisakusho Co., Ltd .: product number No. 7644) was pasted across the entire width for bonding the sheet 6 to form the joint 8. As in the example, the sheet could be wound without any problem, but the lead paper was broken during printing, and the lead paper could not be fed out.
[Brief description of the drawings]
FIG. 1 is a perspective view of a cylindrical support using a perforation as a score line.
FIG. 2 is an explanatory view showing a configuration of a cylindrical support.
FIG. 3 is an explanatory view showing attachment of a cylindrical support and a film or sheet.
FIG. 4 is a perspective view of a cylindrical support using a material that is easy to break along a score line.
FIG. 5 is an explanatory diagram showing a winding process during film or sheet production.
6 is a cross-sectional view of the bonding portion 4 in FIG. 5;
FIG. 7 is an explanatory diagram showing a winding process during printing.
8 is a perspective view illustrating the state of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical support body 2 Core tube 3 Lead paper 3a Lead paper front-end | tip part 3b Lead paper termination | terminus part 3L Lead paper below the outermost layer 4 Adhesive part 4a which cannot be peeled again Adhesive part 4b of lead paper front-end | tip part Lead paper front-end | tip part Bonded portion 5 on the lower lead paper with the cut line 5a Broken portion 6 with the cut line 6 Film or sheet 7 Lead paper portion broken from the cut line 8 Joint portion 9 between the lead paper and film or sheet Cut portion 10 Breakable material L Adhesion The length from the end of the portion 4a to the end of the bonding portion 4b with the lower layer lead paper 3L

Claims (4)

A cylindrical support 1 for winding a film or sheet consisting of a core tube 2, lead paper 3, an adhesive portion 4 and a score line 5,
a. The lead paper 3 is used to guide the film or sheet to the guide roll of the printing machine during printing.
b. The lead paper 3 is wound around the core tube 2,
c. The leading end portion of the lead paper 3 and the lower layer lead paper 3L are bonded by the bonding portion 4,
d. A joint 8 is provided on the leading end surface of the lead paper 3, and a film or sheet 6 is joined.
e. The score line 5 was put in L between the end of the lead paper leading end portion of the adhesive portion 4a and the end of the lead portion 3b with the lower lead paper 3L.
A cylindrical support 1 in which a core tube 2 and lead paper 3 are integrated.   The cylindrical support body 1 according to claim 1, wherein the breaking strength of the score line is 1 N / m to 50 N / m. The cylindrical support 1 according to claim 1 or 2, wherein a paper or plastic material is used as the lead paper 3. A method for winding a film or sheet while rotating the cylindrical support 1 using the cylindrical support 1 according to claim 1.

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