JP2010013275A - Narrow long tape winding product and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding technology for stably winding a narrow long tape into an extremely long length reaching 10,000-30,000 m within the comparatively short setting of a winding width Lw of 25.5 mm, for instance. <P>SOLUTION: A combination of tension T applied to the tape 3 and a winding speed S is appropriately controlled in winding. The winding tension is set such that a target value T<SB>0</SB>of initial setting satisfies an expression T<SB>0</SB>=T<SB>1</SB>(W<SB>1</SB>/W+C), and an intermediate target value T is set on the basis of satisfying an expression T=T<SB>0</SB>(1-L/50,000), wherein T1 (g/mm) is an appropriate tension when starting to wind a tape of 2.5 mm in width, W (mm) is a tape width, W<SB>1</SB>=2.5 mm, C=(W-W<SB>1</SB>)/W in the case of C=W<2.5 mm, C=0 in the case of W=2.5 mm, C=0.10-0.15 in the case of W>2.5 mm, and L (m) is a wound tape length. The winding speed is gradually reduced with the progress of winding. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wound product of a narrow long tape made of a thin flexible material such as a thin synthetic resin film, a metal foil nonwoven fabric, or a composite film thereof, and a method for producing the same.

  More specifically, for example, from a wide raw material of a thin material having a thickness of 15 to 100 μm, for example, a narrow and long tape generally slit with a slitter to have a width of about 1.0 to 15 mm, for example. Cylindrical core, that is, a wound product of a long tape wound in a traverse winding manner around the winding core and having a total length of several thousand to several tens of thousands of meters, and a winding method for the production thereof About.

  A typical example of the narrow and long tape as described above is a cover tape for sealing a carrier tape that continuously supplies a small electronic component or the like to an assembly position. In addition, recently, there has been an increasing demand for functional material tapes for special applications such as insulation, protection, or resistance for precision equipment such as medical equipment and electronic equipment including communication.

  This type of long tape has been put on the market as a long winding product of several hundred to several thousand meters in order to improve the working efficiency at the time of use. Longer lengths are required, and depending on the application, there is a demand for a rolled product having a length as long as 10,000 m, or even 20,000 to 30,000 m.

  Conventionally, as a winding form of this type of product, a long tape is wound around the winding core in a single row method, that is, a winding method generally called a record winding method in which the tape is wound in a row in the radial direction, and a long length. A traverse winding method is adopted in which the tape is wound while being traversed in the axial direction of a cylindrical winding core having a relatively longer length.

  In the former record winding method, the smaller the tape width, the more likely it is to collapse due to the effect of slippage between the overlapping tapes during winding and further during handling after winding. It is difficult to keep it stable. For this reason, for example, in the case of a narrow cover tape having a tape width of 1.5 to 2.5 m, only a length of 1,000 m or less can be safely wound up, and the lengthening request as described above is required. I couldn't cope with it.

On the other hand, with the above-described traverse winding method as shown in Patent Documents 1 and 2 below, it is possible to perform a relatively stable winding of a length of several thousand meters.
JP 58-148143 A (FIG. 2) Japanese Examined Patent Publication No. 62-60336

  However, in the case of the conventional general traverse winding, although the request for lengthening can be handled, the following problem has been newly derived.

  That is, traverse winding is performed by winding the tape in a spiral shape while relatively moving the winding position of the long tape guided toward the winding core and the axial position of the winding core in the axial direction. This is wound up while repeatedly reciprocating in the axial direction. In many cases, in order to stabilize the winding shape, the winding is performed in a so-called wrap winding mode in which winding is performed by overlapping a part of adjacent tapes for each winding.

  For this reason, the long tape is sequentially wound up as a new wound layer formed on the outer peripheral surface having a slight step of the previously wound tape layer. In addition, the side edge overlaps the other side edge of the adjacent tape for each turn. For this reason, even if it is slight in the width direction of the tape, harmful distortion deformation tends to occur. In addition to the bending deformation of the tape in the length direction, which can be called the fate of traverse winding, and also the change in the relative elongation of both side edges of the tape that occurs at the turn-up portion of the tape traverse winding, that is, the turning point The straightness and flatness of the long tape are liable to be damaged due to the influence of undulation and wrinkles.

  Such a decrease in straightness and flatness leads to an essential defect such as a decrease in the sealing performance with respect to the carrier tape in the application as a cover tape, for example. Alternatively, in applications as various functional material tapes, it leads to defects in quality characteristics such as a decrease in accuracy of arrangement position on the adherend and a decrease in adhesion to the adherend surface.

In response to such problems, the present inventors have maintained a traverse winding method that can respond to requests for long winding, have no risk of collapse, and generate distorted deformation such as harmful swells and wrinkles. As a technique capable of avoiding this problem, a technique according to the prior invention shown in Patent Document 3 below has been developed.
Japanese Patent No. 3502608

  In this prior invention, winding is performed in a non-wrapping manner while setting a slight gap between adjacent tapes for each winding, and further, the winding tension and the suppression by the touch roll are controlled by their relative relationship. In particular, by controlling to a specific range, the intended purpose can be achieved, and particularly in the field of rolled-up products of cover tapes, great achievements have been achieved.

  However, another new problem has arisen here.

  That is, particularly in the industrial field dealing with cover tapes, the cover tapes have conventionally been widely marketed as single-row record winding products, not traverse windings, due to the problems of distortion of the tape as described above. There is a background. On the other hand, since the cover tape has a tape width of approximately 2.5 mm to at most 25.5 mm, the cover tape feeding equipment of the existing carrier tape sealing device is in the axial direction of the tape roll suspension base for feeding the tape. The length of the tape is usually adapted to accommodate a tape roll having a maximum width of 25.5 mm in accordance with the record-wrapped product having the above tape width, and is wound up by the technique proposed in Patent Document 3. A product in which the winding has a width exceeding 25.5 mm is not compatible with the above-mentioned feeding equipment, and the existing equipment cannot be used in an actual situation.

  Of course, it is naturally considered that a long tape winding product having a winding width of 25.5 mm or less using the technique of the prior invention disclosed in Patent Document 3. However, in this case, the length of the winding core in the axial direction is too short, so that even if the above prior art technique is used, it is wound up with a length exceeding several thousand meters so as to meet the demand for lengthening. In this case, the winding shape becomes unstable due to a significant increase in the winding diameter, and it cannot be distorted that the tendency to collapse easily occurs. For this reason, even if the prior invention technique of Patent Document 3 is used, sufficient satisfaction cannot be given to the request for lengthening.

  In the technical background of the above-described circumstances, the present invention is suitable for traverse winding and wrap winding even when the winding width, that is, the length in the axial direction of the winding core is as short as 25.5 mm or less. By adopting a winding method, it is possible to make a wound product with a large winding diameter that is extremely well-stabilized and does not collapse, and as a result, has a long length ranging from several thousand meters to 20,000 to 30,000 meters. This makes it possible to provide a rolled product and, at the same time, provides almost no undulation, wrinkles or distortion in the width direction of the winding tape. Needless to say, the present invention aims to provide a winding technique for narrow and long tapes that can be excellent in quality characteristics in terms of straightness and flatness as a functional material tape.

  Based on the above-mentioned objectives and technical problems, the present inventors have made extensive experiments and research by taking advantage of our many years of experience in manufacturing precision slitting of film products and winding products of slitted narrow tape. Is repeated, firstly by controlling the appropriate value with time-dependent change in winding tension during the winding operation process, and secondly, a part of the adjacent tape for each winding. These items are determined by appropriate setting of the wrap width relative to the tape width, and, more preferably, by appropriate control with time-dependent change in the winding speed during wrap winding. As a result, the above-mentioned problems were solved at once, and it was found that the initial purpose could be achieved without regret, and the present invention was completed.

  Thus, the present invention provides, as means for solving the above-described problems, a method for stably winding a long and narrow tape and a wound product according to the following configurations [1] to [12].

[1] By winding a thin thin long tape in a traverse winding manner around a cylindrical winding core and in a wrap winding manner in which a part of the adjacent tape overlaps every winding. When manufacturing tape take-up products,
a. When the target value of the tension at the beginning of winding of a long tape (stress per unit width of the tape) is T ₀ , the following formula (A):
T ₀ = T ₁ (W ₁ / W + C) Expression (A)
However, T ₁ ··· 2.5mm width of the tape of the winding start time of the proper tension (g / mm)
W ・ ・ ・ Tape width (mm)
W ₁ ... 2.5mm
C: When W <2.5 mm, C = (W−W ₁ ) / W
When W = 2.5mm, C = 0
When W> 2.5 mm, C = 0.10 to 0.15
Satisfied,
b. When the target value of the tension during winding of the tape is T, the following formula (B):
T = T ₀ (1−L / 50,000) Expression (b)
However, L ... the length of the wound tape (m)
Satisfied,
c. And, the tension Ta actually applied during winding of the tape is set within ± 10% of the tension target value T,
A method for producing a wound product of a narrow and long tape, wherein the winding is performed as described above.

[2] proper tension T ₁ of the at winding start tape 2.5mm wide, 18-22 g / mm is set forth in the preceding paragraph [1] The method for producing a winding product narrow long tape according to.

[3] When the initial winding speed S ₁ (m / min) in a winding start region including a length portion of at least 50 m and 500 m or less from one end (starting end) of the start of the long tape is 100,
Fast winding speed S ₂ at a constant speed in the intermediate region, set in the range of 130 to 180% of the initial take-up speed S _1,
The final winding speed S ₃ in the winding end region including the length portion of at least 50 m and 500 m or less from the winding end terminal is set in a range of 20 to 70% of the initial winding speed S ₁ .
The winding speeds S ₁ to ₂ and S ₂ to ₃ of the respective regions between the winding start region and the intermediate region and between the intermediate region and the winding end region are gradually increased and decreased gradually or stepwise, respectively. As a thing
The method for producing a wound product of a narrow and long tape according to [1] or [2], wherein the winding is performed.

[4] initial take-up speed S ₁ is, 60~100m / min in a previous section [3] winding method for producing a product of narrow elongated tape described.

[5] When the target value of the lap width between adjacent tapes for each winding is R ₀ , the following formula (C):
R ₀ = (W−α) / 2 Formula (C)
However, α = (6W−4) / (2W + 5)
Satisfied,
And the actual wrap width Ra during winding of the tape is set to ± 15% or less of the target value R ₀ ,
The manufacturing method of the winding product of the narrow long tape according to any one of [1] to [4], wherein the winding is performed.

  [6] The wrap width Ra is wound while increasing stepwise or continuously at an increase rate of 0.5 to 7% per 1000 m of the winding length as the winding length of the tape increases. A method for producing a wound product of a narrow and long tape according to [5] above.

  [7] The narrow length according to any one of [1] to [6], wherein the long tape is a synthetic resin tape having a thickness Tt of 15 to 100 μm and a width Tw of 1.0 to 40 mm. A method for manufacturing rolled-up products of isometric tape.

  [8] The long continuous tape is a cover tape having a thickness Tt of 20 to 80 μm and a width Tw of 2.5 to 13.5 mm. Method.

  [9] The method for producing a wound product of a narrow and long tape according to [8] above, wherein the wound width Lw in the axial direction of the wound product is 25.5 mm or less.

  [10] A wound product of a narrow and long tape manufactured by the manufacturing method according to any one of [1] to [7].

  [11] The wound product of the narrow and long tape according to [10], wherein the narrow and long tape is a functional material tape excluding a cover tape.

  [12] A wound product of a cover tape manufactured by the manufacturing method according to [8] or [9] above.

  In the method described in the above item [1] of the present invention, as a result of appropriate adjustment of the winding tension, a traverse winding method and a wrap winding method are adopted. Even with a relatively small setting of 5 mm or less, long windings of several thousand meters or more are stable without causing winding slip and maintaining excellent shape retention. Winding can be performed.

  In addition, when the tape is rewound from this long wound product, harmful deformation such as distortion, waviness, wrinkles, etc. of the tape is minimized, and the straightness and flatness can be excellent. For example, it can be excellent in sealing properties in applications to cover tapes, and can be excellent in placement accuracy and adhesion in applications of functional material tapes.

  Therefore, especially in the field of cover tapes, for example, the tape width is 2.5 to 5.5 mm or less, so that a record winding can only take up a length of 2 to 3000 m or less. The width cover tape can be marketed as an extremely long and stable wound product having a length of 2 to 30,000 meters. This means that it is possible to continuously supply a long cover tape by using the existing tape feeding equipment having a maximum width of 25.5 mm, which the existing carrier tape sealing device has, and it is possible to perform electronic supply using a carrier tape. It is possible to improve the efficiency of sealing work, save new capital investment by effectively using existing equipment, and save labor.

  Further, when the tension at the beginning of winding is set to 18 to 22 g / mm per 2.5 mm width of the tape as described in the above item [2], according to knowledge obtained from the results of repeated experiments, In particular, in the case of a cover tape, the above effect can be achieved most reliably.

  Further, in the method described in the above item [3], the effect described in the item [1] can be achieved more reliably by appropriate control that accompanies a change in winding speed with time.

  Further, in that case, the initial winding speed was set to 60 to 100 m / min as described in the above item [4], and the winding was performed under the conditions in the above item [3]. In the knowledge, the above-mentioned effect can be most surely enjoyed.

  In the method described in [5] above, the effects described in the above items can be achieved more reliably by appropriately setting the wrap width.

  In that case, as described in the above item [6], the effect can be most surely enjoyed by appropriately controlling the lap width with a change over time.

  In addition, when the synthetic resin tape as described in the above item [7] is used as the winding object, the methods as described in the above [1] to [6] can be most advantageously applied.

  Furthermore, when the cover tape as described in the above item [8] is used as an object to be wound, provision of a wound product which is longer than the conventional wound product of the cover tape and has a smaller winding width. Is possible.

  Therefore, as described in the above item [9], when the winding width is set to 25.5 mm or less and the product has a short winding core length, the rewinding tape has no quality defect, and It is possible to use the existing tape feeding equipment for record winding products that have a maximum winding width of 25.5 mm or less, even though they are wound products with a long winding width exceeding 10,000 m with a stable winding shape. Therefore, it can greatly contribute to the cost and time saving of equipment replacement.

  In addition, in the long tape winding product as described in the items [9] to [12], the long winding is performed while the tape has fewer quality defects at the time of rewinding than the conventional product. In addition, it can provide a product with a stable winding shape.

  Next, a preferred embodiment of the present invention will be specifically described.

  First, FIGS. 1 and 2 show an example of a long tape winding product (1) according to the present invention. The wound product (1) is relatively thin, for example, a thin wall around a cylindrical winding core (2) having an axial length (Cl) of 25.5 mm and an inner peripheral diameter (Cd) of 76.2 mm. The narrow and long tape (3) is wound in a traverse winding manner, and a part of the tape (3) adjacent to each winding is wound in a wrap winding manner where the side edges overlap each other. It is. The long tape (3) is generally wound from several thousand meters to 20,000 to 30,000 meters in one product (1). For example, a cover tape made of an olefin-based film having a thickness of 55 μm and a width of 5.2 mm is wound on the winding core (2) having a length of 25.5 mm, and the traverse winding having a winding width (Lw) of 25.5 mm is wound by 10,000 m. In the product (1) taken, the product diameter, that is, the winding diameter (Ld) is approximately 600 mm.

  The above wound product (1) slits the raw material made of a wide film material into a plurality of narrow tapes with a slitter, and then narrows the tape with a number of winding devices attached to the downstream side of the slitter. Are manufactured by winding them one by one on each core (2) by the traverse winding method.

  FIG. 3 shows an outline of the winding device. In the figure, (4) is a dancer roller that applies a winding tension to the tape (3), and (5) is a touch roll. In a preferred winding device to which the present invention is applied, the winding core side is moved in the axial direction. A bobbin traverse method that is traversed is adopted. In addition, it is possible to adopt a tape guide traverse method in which the tape side is traversed. However, in the bobbin traverse method, since the introduction path to the winding core of the tape (3) is constant, the tape (3 ) It is preferable in that it is difficult to cause deformation such as kinking and wrinkles and can be wound in a more stable state.

  FIG. 4 is a conceptual explanatory diagram of the wrap winding mode of the long tape (3), and specific matters will be described in the section of “wrap width (traverse bitch)” described later.

  Next, the long tape (3) to which the present invention is applied, and the winding conditions constituting the essential elements of the present invention for its preferred winding, i.e., first, control of winding tension, and second, winding. Each item of the control of the take-up speed and thirdly the control of the lap width (traverse feed pitch) will be described sequentially.

[Long tape]
The long tape (3) as a winding object to which the present invention is applied is mainly a cover tape for sealing a carrier tape, but the application object of the present invention is not limited to this. The present invention is widely applied as a winding technique for various functional material tapes other than the cover tape. Therefore, the long tape (3) to which the present invention is applied includes all synthetic resin tapes having a thickness Tt of 15 to 100 μm and a width Tw of 1.0 to 40 mm, which are relatively narrow.

  The cover tape is made of a polyethylene-based, polypropylene-based, polystyrene-based, polyester-based, or vinyl chloride-based composite film having a heat seal layer on one side. In this case, generally, the thickness Tt is 20 to 80 μm, The width Tw is in the range of 2.5 to 13.5 mm. Although there are rarely cover tapes with thicknesses and widths that exceed the above ranges, in the case of such thick and wide tapes, it is not necessary to apply the present invention, and it is stable and long for both record winding and traverse winding. Winding is possible and there is little need for application of the present invention.

  On the other hand, as described above, the functional material tape other than the cover tape includes special tapes for medical equipment, precision equipment insulation, protection or resistance. Typical examples of actual demand are listed below: Aramid-based non-woven fabric tapes (thickness: 35 μm, width 20.0 mm, winding length: 10,000 m), pharmaceutical polypropylene tapes (Thickness: 50 μm, width: 20.0 mm, winding length: 6,000 m), highly stretchable fluororesin tape for optical fiber communication (thickness: 100 μm, width: 3.0 mm, winding length: 3,000 m) ), Nylon non-woven tape for insulating material (thickness: 30-50 μm, width: 3.2-4.6 mm, winding length: 10,000 m), polyimide / PPS composite tape for semiconductor (thickness: 50) ˜75 μm, width: 2.6 mm, winding length: 5,000 m).

[Control of winding tension]
First, the tension at the start of winding of a long tape (stress per unit width of the tape) must be set to a value that satisfies the following formula (A) when its target value is T ₀ .

T ₀ = T ₁ (W ₁ / W + C) Expression (A)
However, T ₁ ··· 2.5mm width of the tape of the winding start time of the proper tension (g / mm)
W ・ ・ ・ Tape width (mm)
W ₁ ... 2.5mm
C: When W <2.5 mm, C = (W−W ₁ ) / W
When W = 2.5mm, C = 0
When W> 2.5 mm, C = 0.10 to 0.15

Here, the value of T ₁ , that is, the appropriate tension at the start of winding of a 2.5 mm width tape is 18 to 22 g / mm, particularly preferably 19 to 21 g / mm, based on knowledge obtained from various experimental results. It is desirable to set it within the range.

Then, as the winding progresses, the tension during winding in relation to the length of the tape that has been wound is T with respect to the tension target value T ₀ at the start of winding when the target value is T. Therefore, it is necessary to set the value to satisfy the following formula (b).

T = T ₀ (1−L / 50,000) Expression (b)
However, L ... the length of the wound tape (m)

  That is, it is necessary to gradually reduce the winding tension gradually or at a predetermined rate as the winding progresses.

  However, in view of the fact that it is practically impossible or extremely difficult to always control the tension according to the target value during winding, the tension Ta actually applied during tape winding is equal to the tension target value T. Winding is performed while controlling ± 10% within the allowable range.

  If the tension at the start of winding and the tension during winding deviate from the above specified range, smooth and satisfactory winding cannot be performed. That is, when the tension is too low, the adhesion between the tapes becomes weak, and the longer the tape, the more likely it will be crushed by slipping, making it impossible to fully satisfy the desired long-winding request. On the other hand, if the tension is too high (too strong), the tape may break at the initial stage of winding, and the tape may be excessively wound so that it is in a so-called “solid winding” state, causing deformation of the tape. Not only is this easy to occur, but the rolls are likely to collapse from the turning point of the traverse. As a result, it becomes difficult to meet the demand for long winding.

  Even when strong gradual reduction control over time is not performed during winding, the winding from the turning point is likely to be collapsed, as described above, and the request for lengthening cannot be sufficiently satisfied.

[Control of winding speed]
By appropriate control of the above-described winding tension, it is possible to manufacture an excellent long wound product. However, in order to obtain a product that is even more stable and excellent in quality with no fear of collapse, it is desirable to perform control that accompanies changes in winding speed over time in addition to tension control. .

  In this winding speed control, as the winding length progresses, the speed is increased stepwise up to the intermediate stage sequentially or continuously, and constant speed winding is performed at a high speed in the intermediate stage. Then, the speed is reduced as the end of the winding is near the end terminal, and the winding is performed at a low speed at the end of winding.

More specifically, the initial winding speed S ₁ (m / min) in the winding start region including a length portion of at least 50 m and 500 m or less from one end (starting end) of the start of the long tape is preferably 60. It is assumed that the initial winding speed S _{1 is set} to 100, and the high speed winding speed S ₂ at a constant speed in the intermediate region is set to a range of ˜100 m / min, particularly 65 to 75 m / min. The initial winding speed S ₃ is set in the range of 130 to 180% of the initial winding speed S ₁ , and the final winding speed S ₃ in the winding end region including the length portion of at least 50 m and 500 m or less from the winding end terminal is set to the initial winding speed S _3. winding speed of the region between the winding and sets 20 to 70% of the speed S _1, between the winding start region and the intermediate region, and the intermediate region and the winding end region It is preferable to perform the above-described winding, as the degrees S ₁ to ₂ and S ₂ to ₃ are gradually increased or decreased stepwise or continuously.

When the initial take-up speed S ₁ of the is too slow, not poor winding operation efficiency only, stable traverse wound initialization lap width becomes hardly performed with good. On the other hand, if the speed is too high, the tape may break, and the initial setting is difficult to perform well, and the amount of air entrained at the beginning of the winding increases, and a winding deviation defect tends to occur.

Further, when the high-speed take-up speed S ₂ of the intermediate is too slow, but seems to be due to insufficient amount of air caught in the laminated layers of the tape, it tends to be the same solid-winding state, prone to collapse winding turn . On the other hand, when the speed is too fast, the tape is loosened and the roll is easily collapsed due to the interlayer slip.

Furthermore, when the final take-up speed S ₃ too slow, the part of the winding end is a solid wound, or apply deformation tightening portions in this part, susceptible to defects that cause winding deviation. On the other hand, if the speed is too high, there is an increased risk of winding collapse due to an impact caused by sudden deceleration stop at the end of winding, and the winding end portion becomes excessively loosely wound, often causing defects in winding. easy.

A particularly preferred range of high-speed take-up speed S ₂ in the intermediate region is in the range of 140-160% of the initial take-up speed S _1. Likewise particularly preferred range of final take-up speed S ₃ is 30 to 50% of the initial take-up speed S _1.

[Lap width (feed pitch) control]
As shown in the schematic diagram of FIG. 4, the wrap width (Rw) refers to the width of the overlapping portion of the side edges of the adjacent tape (3) for each turn during traverse winding. It is determined by the moving distance of the winding position shifted in the axial direction on the winding core (2) for every rotation of the core (2), that is, the feed pitch (Pw). Accordingly, a value obtained by subtracting the feed pitch (Pw) from the tape width (Tw) corresponds to the wrap width (Rw).

  According to the knowledge obtained from the vast experimental results by the present inventors, the appropriate preferable wrap width (Rw) varies depending on the tape width (Tw) of the long tape (3) to be wound, and in addition, the winding It also changes with the progress of taking length.

Here, it is desirable that the wrap width (Rw) satisfies the following formula (C) when the target value is R ₀ .

R ₀ = (W−α) / 2 Formula (C)
However, α = (6W−4) / (2W + 5)

The actual wrap width Ra in the winding of the tape, as the allowable range ± 15% of the target value R _0, should be to perform winding while setting within the allowable range.

  Further, the wrap width Ra is taken up while increasing stepwise or continuously at an increase rate of 0.5 to 7% per 1000 m of winding length as the winding length of the tape increases. It is preferable to do.

  The increase rate of the wrap width (Ra) is desirably set larger as the tape width (Tw) is smaller. Specifically, when the tape width (Tw) is 2.5 mm or less, the increase rate of the wrap width (Ra) per 1000 m of the winding length is in the range of about 4.0 to 7.0%. If the tape width (Tw) is more than 2.5 mm and 7.0 mm or less, the increase rate should be set to a value of about 2.0 to 4.0%. Is desirable. Furthermore, when the tape width (Tw) is relatively wide such that it exceeds 7.0 mm, the increase rate is preferably set to a low value in the range of 0.5 to 2.0%.

  When the wrap width Ra exceeds the above preferred range and is too large, not only is the tape easily deformed in the width direction of the long tape (3), but the winding shape becomes unstable, It is difficult to fully satisfy the request. On the contrary, when the wrap width Ra is too small, the deformation is likely to occur and the winding shape is likely to be unstable.

[Example]
Next, in order to verify the effects of the present invention, specific experimental examples and results will be described.

[Experimental example no. 1-7]
These Experimental Examples No. Nos. 1 to 7 show the most preferred embodiments of the present invention for a plurality of types of long tapes having different tape widths, uses, materials, and the like.

  In all the experimental examples, a cylindrical winding core (2) having a length Cl: 25.5 mm and an inner diameter Cd: 76.2 mm was used, and a long tape (3) was wound around the circumference in a traverse winding manner at 10,000 m. The winding condition (tension, winding speed, lap width) was set as shown in Tables 1-A to D below, and winding was performed.

  And about each experimental example, the winding workability | operativity, the shape retention property (form stability) of a winding product, and tape shape stability (presence of bending deformation etc.) were evaluated, and the result was shown to Table 1-AD. It was written together.

  The evaluation method and evaluation criteria for each evaluation item are as follows.

<Winding workability>
It is judged that winding up to 10,000 m can be carried out and winding can be continued in a uniform manner without causing troubles such as collapse during winding, and further longer winding is possible. "○" indicates that the winding was continued until 10,000m was reached, but the winding shape was clearly irregular and it was determined that further winding was difficult. In the case of “Δ”, those that collapsed by 10,000 m or that a stable and stable traverse winding state could not be obtained were indicated by “x”.

<Shape retention>
After pulling out the 10,000m winding product (1) from the winding drive shaft of the winding device, the stability of the winding shape when the product is held by hand is evaluated, and it is good without causing any shape loss. "○" indicates that it was able to maintain stability, and "X" indicates that there is a risk of easy collapse due to a slight external impact or load. It has intermediate stability. Things were marked with “△” marks.

<Tape shape stability (flatness / straightness)>
Rewind the wound product tape about 1,000m from the end of winding, cut the unrolled tape in the vicinity of 1000m into 3m length and use it as a test piece. Inspected for the presence of meandering deformation and waviness, flatness in the width direction, and the presence or absence of wrinkles on the side edges by visual inspection and metal rule measurement. Although marked with a “○” mark, minor swells and deformations are recognized, but those that are judged to have no practical problems (for example, a swell of less than 3 mm) are marked with a “△” mark and are clearly harmful. What was considered to be a deformation or the like was marked with an “x” mark.

<Experimental Examples 8 to 14>
In this experimental example, the proper setting of the winding tension is examined.

  Therefore, as shown in Table 2, the initial tension at the beginning of winding was changed in various ways, and the winding speed was appropriately controlled, while the wrap width was fixed to a constant value, and a winding experiment was performed. Is also shown in Table 2.

  As shown in the “Characteristics” column of Table 2 above, the experiment No. in which the initial tension and the tension during winding were set to appropriate values within the specified range of the present invention were used. In Nos. 9 to 12, good results are obtained in terms of winding workability, shape retention, and tape shape stability.

  On the other hand, the initial tension is too low. In the case of 8, the adhesion of the tape between the wound layers becomes weak, so that the roll collapse occurs at a winding length of about 4.500 to 5,000 m. In the case of Experimental Example 13 in which the initial tension is too strong, the interlayer tightening of the tape becomes too strong, and as a result, winding collapse occurs in the vicinity of the winding length of 3,000 to 3,500 m.

  On the other hand, even if the initial tension is appropriate, Experiment No. In the case of No. 14, winding collapse often occurs when the winding length advances from 4,000 to 4,500 m.

[Experimental example no. 15-24]
These Experimental Examples No. Nos. 15 to 24 are used for checking an appropriate setting of the winding speed.

  Therefore, as shown in Table 3, the initial speed at the start of winding and the winding speed during winding were changed in various ways, and the winding tension and the lap width were fixed to certain conditions that seemed best, and a winding experiment was conducted. It is a thing. The experimental results are also shown in the “Evaluation” column of Table 3.

  As shown in the “Characteristic” column of Table 2 above, the experiment No. in which the initial speed setting and the speed control during winding were both properly performed within the specified range of the present invention. In the case of 16-18 and 22, all can take up a long length stably, the winding form is stable, and good winding with almost no harmful deformation on the rewinding tape is observed. It was possible to confirm that the product was obtained.

  On the other hand, the experiment No. In the case of 15, not only the winding work efficiency is poor, but also the stability of the wound-up body in the initial winding stage is particularly poor. On the contrary, the initial speed setting is too fast. In the case of No. 19, not only the tape is detrimentally stretched at the initial stage of winding, but also the winding layer is disturbed and is likely to collapse relatively early.

  In addition, even when the initial speed setting was appropriate, the speed control during winding was not performed properly. In the case of 20, 21 and 23, 24, it was confirmed that all of them had problems in winding workability and shape retention.

[Experimental example no. 25-33]
These Experimental Examples No. Nos. 25 to 33 are used to search for an overlap width between adjacent winding tapes during winding, that is, a wrap width and an appropriate control value for changing the winding width as the winding progresses.

  However, according to the results of many experiments conducted by the present inventor, control during the gradual change of the wrap width with the progress of winding is an indispensable matter in relation to the demand for stable long winding of the tape. Instead, the above experiment No. Even when a constant lap width is maintained from the beginning to the end as in the case of 1 to 14, good results can be obtained.

  However, even if this is the case, it is effective to make the winding shape of a long winding product more even and stable when performing appropriate control that gradually changes the lap width during winding. is there.

  Therefore, Experimental Example No. For Nos. 25 to 33, the wrap width at the beginning of winding and the change value of the wrap width during winding were changed in various ways, and the winding tension and the winding speed were fixed to certain conditions that seemed to be the best, and a winding experiment was conducted. . The effect of changes in the lap width was investigated. These experimental results are also shown in Table 4.

  As shown in the “Characteristics” column of Table 4 above, the experiment No. in which a slight gradual change control of the initial lap width and the wrap width during winding was performed. In the case of 26-28 and 31-32, the best results were obtained.

  In contrast, Experiment No. When the wrap width of 25 is not set, that is, when the winding is performed without overlapping adjacent tapes, the long winding reaching 10000 m cannot be performed, and the object of the present invention can be achieved. Can not. In addition, the experiment No. in which the setting of the wrap width is excessive due to the relative relationship with the tape width. In the case of No. 29, or conversely, experiment No. in which the setting of the lap width is too small. In the case of No. 30, the experiment No. in which the initial setting is excessive and the control during winding is also inappropriate. In case of No. 33, although it was possible to wind up to 10000 m, it had some problems in terms of shape retention and stability of the tape shape.

  INDUSTRIAL APPLICABILITY The present invention is applied to a winding technique for a narrow and long tape of a composite film used as various functional material tapes, including a cover tape for sealing a carrier tape used for packaging of microelectronic components. . More specifically, it is a technique applied when winding a narrow long film obtained by slitting a raw material of a wide composite film to a predetermined width after the slit.

It is a perspective view which shows an example of the long tape winding product which concerns on this invention. It is a front view same as the above. It is a perspective view which shows the one part outline | summary of the winding apparatus used for implementation of this invention. It is a conceptual explanatory view of the wrap winding mode according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Long tape winding product 2 ... Winding core 3 ... Narrow width long tape 4 ... Dancer roller 5 ... Touch roll Rw ... Wrap width Lw ... Roll width Ld ... Winding diameter

Claims (12)

Winding a long thin tape by winding a thin thin long tape in a traverse winding manner around a cylindrical core and in a wrap winding manner in which a part of the adjacent tape overlaps each winding. When manufacturing products,
a. When the target value of the tension at the beginning of winding of a long tape (stress per unit width of the tape) is T ₀ , the following formula (A):
T ₀ = T ₁ (W ₁ / W + C) Expression (A)
However, T ₁ ··· 2.5mm width of the tape of the winding start time of the proper tension (g / mm)
W ・ ・ ・ Tape width (mm)
W ₁ ... 2.5mm
C: When W <2.5 mm, C = (W−W ₁ ) / W
When W = 2.5mm, C = 0
When W> 2.5 mm, C = 0.10 to 0.15
Satisfied,
b. When the target value of the tension during winding of the tape is T, the following formula (B):
T = T ₀ (1−L / 50,000) Expression (b)
However, L ... the length of the wound tape (m)
Satisfied,
c. And, the tension Ta actually applied during winding of the tape is set within ± 10% of the tension target value T,
A method for producing a wound product of a narrow and long tape, wherein the winding is performed. 2. The method for producing a wound product of a narrow and long tape according to claim 1, wherein an appropriate tension T ₁ at the start of winding of a 2.5 mm width tape is 18 to 22 g / mm. When an initial winding speed S ₁ (m / min) in a winding start region including a length portion of at least 50 m and 500 m or less from one end (starting end) of winding of the long tape is 100,
Fast winding speed S ₂ at a constant speed in the intermediate region, set in the range of 130 to 180% of the initial take-up speed S _1,
The final winding speed S ₃ in the winding end region including the length portion of at least 50 m and 500 m or less from the winding end terminal is set in a range of 20 to 70% of the initial winding speed S ₁ .
The winding speeds S ₁ to ₂ and S ₂ to ₃ of the respective regions between the winding start region and the intermediate region and between the intermediate region and the winding end region are gradually increased and decreased gradually or stepwise, respectively. As a thing
The method for manufacturing a wound product of a narrow and long tape according to claim 1 or 2, wherein the winding is performed. Initial winding speed S ₁ is, 60~100m / min A method of manufacturing a take-up product narrow long tape according to claim 3. When the target value of the lap width between adjacent tapes for each winding is R ₀ , the following formula (C):
R ₀ = (W−α) / 2 Formula (C)
However, α = (6W−4) / (2W + 5)
Satisfied,
And the actual wrap width Ra during winding of the tape is set to ± 15% or less of the target value R ₀ ,
The manufacturing method of the winding product of the narrow long tape of any one of Claims 1-4 which performs the said winding.   6. The wrap width Ra is wound while increasing stepwise or continuously at an increasing rate of 0.5 to 7% per 1000 m of winding length as the winding length of the tape increases. A method for producing a wound product of a narrow long tape described in 1.   The said long tape is a synthetic resin tape of thickness Tt: 15-100micrometer and width Tw: 1.0-40mm, The winding product of the narrow long tape of any one of Claims 1-6 Manufacturing method.   The said long tape is a cover tape of thickness Tt: 20-80micrometer and width Tw: 2.5-13.5mm, The manufacturing method of the winding product of the narrow long tape of Claim 7.   The method for producing a wound product of a narrow and long tape according to claim 8, wherein the winding width Lw in the axial direction of the wound product is 25.5 mm or less.   A wound product of a narrow and long tape manufactured by the manufacturing method according to any one of claims 1 to 7.   The wound product of the narrow and long tape according to claim 10, wherein the narrow and long tape is a functional material tape excluding a cover tape.   A rolled-up product of a cover tape manufactured by the manufacturing method according to claim 8 or 9.

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