WO2019102623A1 - Bobbin - Google Patents

Abstract

Provided is a bobbin that can prevent occurrences of broken end. A bobbin 1 comprises a plurality of annular protrusions 5 having a trapezoidal cross section along the circumferential direction of the periphery of a cylinder 3 for winding thread. The height h of an annular protrusion 5 is 20 to 200 μm; an interval d₁, which is the distance between centers of adjacent annular protrusions, is in the range of 100 to 9400 μm; and the ratio d₁/h of the interval d₁, which is the distance between centers of adjacent annular protrusions 5, 5 to the height h of an annular protrusion 5 is 3.4 to 75.0.

Description

Bobbin

The present invention relates to a bobbin.

Conventionally, when forming a yarn package, a bobbin for winding the yarn is used. The yarn is, for example, a yarn made of glass fiber (hereinafter, abbreviated as glass yarn), and is used for producing a glass fiber fabric or the like.

As the bobbin, for example, a bobbin provided with a plurality of annular convex portions having a trapezoidal shape in a sectional view along the circumferential direction is known around the yarn winding cylindrical portion (see, for example, Patent Document 1).

In the bobbin described in Patent Document 1, by providing the plurality of annular convex portions around the winding portion, the thin thin yarn layer being wound is prevented from slipping when the innermost layer of the yarn is unwound, and the yarn is Is said to solve the problem of thread breakage caused by overlapping.

JP, 2004-142916, A

However, in the above-mentioned conventional bobbin, a phenomenon called “punch-free” occurs, in which an extremely thin glass yarn of 2.7 g / km or less is wound and the glass yarn is cut when the glass yarn is drawn and unwound. There is a disadvantage.

An object of the present invention is to provide a bobbin capable of solving the above problems and suppressing the occurrence of no threading.

In order to achieve such an object, the bobbin of the present invention is a bobbin provided with a plurality of annular convex portions having a trapezoidal shape in cross section along the circumferential direction of the cylindrical portion for winding yarn, The height h of the annular convex portion is in the range of 20 to 200 μm, and the distance d ₁ as the center-to-center distance between adjacent annular convex portions is in the range of 100 to 9400 μm. The ratio d ₁ / h of the distance d ₁ as the center-to-center distance between the adjacent annular convex portions to the height h of h is in the range of 3.4 to 75.0.

According to the bobbin of the present invention, the height h of the annular projection of the cross section trapezoidal in the range of 20 ~ 200 [mu] m, ~ distance d ₁ as the distance between the centers of the annular protrusions between the adjacent 100 9400Myuemu The ratio d ₁ / h of the distance d ₁ as the center-to-center distance between the adjacent annular convex portions to the height h of the annular convex portion is in the range of 3.4 to 75.0. As a result, it is possible to suppress occurrence of threading, even when winding an extremely thin glass yarn of 2.7 g / km or less.

If the height h of the annular convex portion is less than 20 μm, it is difficult to sufficiently prevent the winding deviation of the wound glass yarn, and it is impossible to suppress the thread end. If it exceeds 200 μm, the glass yarn is released from the bobbin The damage received by touching the annular convex portion at the time of chewing increases and fluff is easily generated.

Further, the distance d ₁ as the distance between the centers of the annular protrusions adjacent, is less than 100 [mu] m, because the interval between the annular projection is too narrow, it is possible to glass yarn wound enters sufficiently into the gap In addition, since it is difficult to obtain the effect of suppressing the winding displacement, it is impossible to suppress the punctuation. If it exceeds 9400 μm, the ratio of the glass yarn in contact with the annular convex portion is reduced, a sufficient effect of preventing the winding displacement can not be obtained, and no yarn thread can not be suppressed.

Further, the ratio d ₁ / h of the distance d ₁ as the center-to-center distance between adjacent annular convex portions to the height h of the annular convex portion is less than 3.4 or exceeds 75.0. And, it can not suppress the occurrence of no clue.

In the bobbin of the present invention, the ratio (d ₁ / h) of the distance d ₁ as the center-to-center distance between the adjacent annular convex portions to the height h of the annular convex portion is in the range of 5.0 to 30.0. Is preferred. By to the height h of the annular projection, the ratio of the distance d ₁ as the distance between the centers of the annular protrusions adjacent (d 1 _{/ h)} is in the above range, the generation of free clues more reliably It is possible to prevent the generation of fluff more effectively.

Further, it in the bobbin of the present invention, the annular convex portion is in the range length _{W 1} of the upper base of 180 ~ 500 [mu] m in cross section a trapezoidal shape, the length _{W 2} of the lower base is in the range of 180 ~ 800 [mu] m Is preferred. The annular convex portion by the length W ₂ of the length W ₁ and the lower base of the upper base of the cross section trapezoidal in said range, it is possible to more effectively suppress the occurrence of no clue.

Also, the bobbin of the present invention, the annular projection when the length W ₂ of the length W ₁ and the lower base of the upper base of the cross section trapezoidal in said range, above the lower base to the length W ₂ It is preferable that the ratio of the bottom length W ₁ (W ₁ / W ₂ ) be in the range of 0.90 to 1.00. By the ratio of the annular convex portion of the lower base in cross section trapezoidal upper base to the length W ₂ length _{W 1 (W 1 / W 2} ) is in the range, very efficient generation without clues Can be suppressed.

Further, in the bobbin of the present invention, the upper processing ratio of the yarn winding cylindrical portion is preferably in the range of 50% or more.

The upper processing rate of the yarn winding cylindrical portion is a region where the annular convex portion is provided with respect to the length L ₁ of the upper half of the yarn winding cylindrical portion (starting from the annular convex portion located at the bottom) as, it means the ratio of the length L ₂ of the region) and ending an annular protrusion located closest to the top.

If the upper processing ratio of the yarn winding cylindrical portion is 50% or more, the height h of the annular convex portion provided in the lower half of the yarn winding cylindrical portion is in the range of 20 to 200 μm, fit in the range interval d ₁ of 100 ~ 9400μm as distance between centers of the annular protrusions, to the height h, the distance d ₁ as the distance between the centers of adjacent annular convex portions the ratio d _{1 /} h Even if it does not satisfy the condition of being in the range of 3.4 to 75.0, it is possible to suppress the occurrence of no thread.

The upper half means a range from the upper end of the bobbin to a point 50% of the total length of the bobbin from the upper end of the bobbin, and the lower half means 50% of the total length of the bobbin from the upper end of the bobbin It means the range from the point of% to the lower end of the bobbin.

Further, in the bobbin of the present invention, it is further preferable that the upper processing ratio of the yarn winding cylindrical portion is in the range of 50 to 95%. The bobbin of the present invention can suppress generation of fluff more effectively by the upper processing rate of the yarn winding cylindrical portion being in the above-mentioned range.

Further, the yarn package of the present invention is characterized in that a glass yarn in the range of 0.3 to 2.7 g / km is wound around a bobbin having any of the above-mentioned configurations.

According to the yarn package of the present invention, since the glass yarn in the above range is wound around the bobbin having any of the above-described configurations, the occurrence of no threadhole can be more reliably prevented, and fluff Occurrence can be suppressed more effectively.

The front view which shows one structural example of the bobbin of this invention. Explanatory drawing which expands and shows the shape of the cyclic | annular convex part of the bobbin shown in FIG. Explanatory drawing which shows the case where the annular convex part of the bobbin shown in FIG. 1 is a cross sectional view substantially trapezoidal shape.

Next, embodiments of the present invention will be described in more detail with reference to the attached drawings.

As shown in FIG. 1, the bobbin 1 according to the present embodiment includes a flange 2 provided at the bottom, a hollow cylindrical cylindrical thread winding cylinder 3 erected on the flange 2, and an upper end of the cylindrical portion 3. A plurality of annular convex portions 5 each having a trapezoidal shape in cross section are provided along the circumferential direction of the cylindrical portion 3. In this embodiment, as shown in FIG. 1, the length of the upper half of the bobbin 1 is L ₁ , and the area where the annular convex portion 5 is provided in the upper half of the bobbin 1 (the lowermost position of the upper half Starting from the annular convex portion 5 and defining the end point of the annular convex portion 5 located at the top of the upper half as L ₂ , the length of the lower half of the bobbin 1 as L ₃ , the bobbin 1 A region where the annular convex portion 5 is provided in the lower half portion (a region having the annular convex portion 5 located at the uppermost portion of the lower half portion as an end point from the annular convex portion 5 located at the lowermost portion of the lower half portion Make the length of L ₄ ).

Further, in the present embodiment, as shown in FIG. 2, the height of the annular convex portion 5 with respect to the outer peripheral surface 3 a of the cylindrical portion 3 is h, and the annular convex portion as the center-to-center distance between adjacent annular convex portions 5 and 5 The distance between the annular convex portions 5 and 5 as the distance between the lower end portions of the annular convex portions 5 and 5 adjacent to each other is d ₁ and the spacing between the annular convex portions 5 and 5 is d ₂ . Let W _{1 be} the length and W _{2 be} the length of the lower base.

The cross-sectional view trapezoidal shape of the annular convex portion 5 includes a substantially trapezoidal shape in which the corner of the upper base is rounded, and a rectangular or square shape in which the lengths of the upper base and the lower base are equal.

In the bobbin 1 of the present embodiment, the range of height h 20 ~ 200 [mu] m of the annular projection 5, the range interval _{d 1} of 100 ~ 9400μm as the distance between the centers of the annular protrusions 5,5 adjacent Ratio d ₁ / h of the distance d ₁ as the distance between the centers of the adjacent annular convex portions 5 and 5 with respect to the height h of the annular convex portion 5 is in the range of 3.4 to 75.0 As a result, it is possible to suppress the occurrence of yarn breakage even when winding an extremely thin glass yarn of 2.7 g / km or less.

The height h of the annular convex portion 5 is preferably in the range of 30 to 180 μm, more preferably in the range of 35 to 160 μm, and still more preferably in the range of 40 to 90 μm.

The distance d ₁ as the center-to-center distance between adjacent annular convex portions 5 and 5 is preferably in the range of 150 to 7000 μm, more preferably in the range of 200 to 3500 μm, and still more preferably 300 to 2000 μm. And particularly preferably in the range of 400 to 800 μm.

The distance _{d 2} as the lower end distance between the annular projection 5, 5 adjacent, for example, in the range of less 7000Myuemu, preferably in the range of 150 ~ 3300μm, more preferably in the range of 180 ~ 1500 .mu.m And more preferably in the range of 200 to 600 μm.

The ratio d ₁ / h of the distance d ₁ as the center-to-center distance between adjacent annular convex portions 5 and 5 with respect to the height h of the annular convex portion 5 is preferably in the range of 3.5 to 63.4. More preferably, it is in the range of 4.0 to 50.0, and more preferably in the range of 5.0 to 30.0. In the bobbin 1 of the present embodiment, the ratio d ₁ / h of the distance d ₁ as the center-to-center distance between adjacent annular convex portions 5 and 5 to the height h of the annular convex portion 5 is 5.0 to 30.0 In the range of, it is possible to more reliably prevent the occurrence of pilus loss with less than 30%, and to suppress the occurrence more effectively with less than 4 fluffs. Can.

In addition, after the yarn package was allowed to stand in an atmosphere of 5 ° C. for 12 hours, the generation rate without thread opening was subjected to 500 vibrations at 25 G in an atmosphere of 5 ° C. using a vibration tester with a thermostat. When the wound glass yarn is unwound from the end of winding to the beginning, the number of yarn packages cut by the glass yarn is determined by dividing by the total number of yarn packages used for yarn no evaluation. it can. In addition, with the number of fluffs generated, the yarn package is allowed to stand in an atmosphere at 5 ° C. for 12 hours, and then 500 vibrations at 25 G in a 5 ° C. atmosphere are applied using a thermostatic vibration tester. When the wound glass yarn is unwound from the end of winding to the beginning, the unwound glass yarn is unwound from the end of winding to a position before 5000 m of the beginning, and then using the fluff measurement device The number of fluffs from the position of 5000 m before the start to the start can be calculated by counting as the total number of fluffs per 333 m of glass yarn.

In the bobbin 1 of the present embodiment, the ratio d ₁ / h of the distance d ₁ as the center-to-center distance between adjacent annular convex portions 5 and 5 to the height h of the annular convex portion 5 is particularly preferably 7.0. It is in the range of ̃25.0, and most preferably in the range of 8.0 to 15.0.

In the bobbin 1, the length W ₁ of the upper bottom of the annular convex portion 5 in the cross-sectional view trapezoidal shape can be, for example, in the range of 50 to 1900 μm. Further, the thickness is preferably in the range of 180 to 500 μm, more preferably in the range of 200 to 450 μm, and still more preferably in the range of 210 to 320 μm, because this can be reliably suppressed.

In addition, when the cross-sectional view shape of the cyclic | annular convex part 5 is the substantially trapezoidal shape where the corner of the upper base was rounded, length W _{1 of the} upper base is calculated | required as follows. First, a straight line parallel to a straight line b connecting two points (B ₁ and B _{2 in} FIG. 3) which are starting points of the annular convex portion 5 is drawn at a height half the height h of the annular convex portion 5. Subsequently, tangent lines (t ₁ and t _{2 in} FIG. 3) are drawn at two points (M ₁ and M ₂ in FIG. 3) where the straight line intersects the annular convex portion 5. Then, through the apex of the annular projection 5, draw a straight line b and straight line parallel s, then the intersection of the straight line s and the tangent t ₁ and A _1, the intersection of the straight line s and the tangent t ₂ and A ₂ The distance between A ₁ and A ₂ is taken as the length W _{1 of the} upper base.

On the other hand, the length W ₂ of the lower base of the cross section trapezoidal annular projection 5, for example, may be in the range of 50 ~ 3000 .mu.m, further ensure the generation rate of occurrence of no clue as less than 20% In the range of 180 to 800 μm, the range of 200 to 700 μm is more preferable, the range of 210 to 350 μm is more preferable, and the range of 220 to 290 μm is preferable. Is most preferred.

Further, in the bobbin 1, the ratio W ₁ / W ₂ of the length W ₁ of the upper base to the length W ₂ of the lower base of the annular convex portion 5 in cross sectional view is, for example, 0.05 to 1.00. Although it can be in the range, it is preferable to be in the range of 0.30 to 1.00, since generation can be efficiently suppressed with the occurrence rate of no threading being less than 20%, and occurrence of no threading The ratio is more preferably in the range of 0.90 to 1.00, and particularly preferably in the range of 0.90 to 0.98, because the occurrence can be extremely efficiently suppressed with the rate of less than 10%. preferable.

Further, in the bobbin 1, a region where the annular convex portion 5 is provided in the upper half with respect to the length L ₁ of the upper half of the cylindrical portion 3 (from the annular convex 5 located at the lowermost in the upper half as a starting point The upper processing ratio of the cylindrical portion 3 indicated by the ratio L ₂ / L ₁ of the length L ₂ of the region where the annular convex portion 5 located at the uppermost position in the upper half portion is the end point is in the range of 50% or more Is preferred.

If the upper processing rate of the cylindrical portion 3 is 50% or more, the annular convex portion 5 provided in the lower half of the cylindrical portion 3 has a height h in the range of 20 to 200 μm, and adjacent annular convex portions 5 There spacing _{d 1} as the distance between the centers of 5 to each other in the range of 100 ~ 9400μm, to the height h, adjacent the ratio _d 1 / h intervals _{d 1} as the center-to-center distance between the annular protrusion 5,5 Even if it does not satisfy the condition of being in the range of 3.4 to 75.0, it is possible to suppress the occurrence of no thread.

In the bobbin 1, the upper processing ratio of the cylindrical portion 3 is preferably in the range of 50 to 95%, and the number of fluffs generated can be less than 3.5, and the generation is more effectively suppressed be able to.

The upper processing ratio of the cylindrical portion 3 is more preferably in the range of 55 to 90%, still more preferably in the range of 60 to 85%, and particularly preferably in the range of 63 to 80%. And 65 to 78%.

Further, in the bobbin 1, a region where the annular convex portion 5 is provided in the lower half portion with respect to the length L ₃ of the lower half portion of the cylindrical portion 3 (from the annular convex portion 5 positioned at the lowermost portion in the lower half portion The lower processing ratio of the cylindrical portion 3 indicated by the ratio L ₄ / L ₃ of the length L ₄ of the lower half portion and the region having the annular convex portion 5 located at the uppermost position as the end point is in the range of 50% or more Is more preferably 70% or more, still more preferably 80% or more, and particularly preferably 90 to 99%.

Incidentally, throughout the bobbin 1, the height h of the annular projection 5, and, in the annular projection 5 to the height h, the ratio of the distance d ₁ as the distance between the centers of the annular protrusion 5,5 adjacent d ₁ / h may be the same, and there may be a plurality of regions in the bobbin 1 in which the h and the d ₁ / h are different.

Further, in the yarn package of the present embodiment, the occurrence of no yarn thread is prevented more surely by winding the glass yarn in the range of 0.3 to 2.7 g / km around the bobbin 1 shown in FIG. And the generation of fluff can be suppressed more effectively.

In the yarn package of the present embodiment, a glass yarn in the range of 0.4 to 2.0 g / km is preferably wound around the bobbin 1 shown in FIG. More preferably, the glass yarn in the range of is wound.

In addition, it is also possible to wind the yarn more than 2.7 g / km on the bobbin of the present embodiment.

Next, examples of the present invention will be shown.

The height h of the annular projection 5, the distance _{d 1} of the annular protrusion 5,5 as the distance between the centers of the annular protrusion 5,5 adjacent, the ratio _d 1 / h intervals _{d 1} to the height h, cyclic protrusion cross section stand upper base shape length W ₁ of the _5, the length W ₂ of the lower _base, the ratio W _{1 /} W 2 of the length W ₁ of the upper base of the lower base to the length W _2, the cylindrical portion The bobbins 1 of Examples 1 to 9 and Comparative Examples 1 to 3 were prepared as shown in Tables 1 to 3 for the upper processing rate and the lower processing rate of 3. In Example 6, h, d ₁ , d ₁ / h, W ₁ , W ₂ , W of Example 6 shown in Table 2 are shown in the upper processing ratio shown in Table 2 in the upper half of the bobbin 1. _The annular convex portion 5 having ₁ / W ₂ is provided, and the lower half portion of the bobbin 1 is h, d ₁ , d ₁ / h identical to Comparative Example 3 shown in Table 3 at the lower processing rate shown in Table 2. , W ₁ , W ₂ and W ₁ / W ₂ are provided.

Next, a glass yarn in the range of 1.65 g / km was wound around the cylindrical portion 3 of each bobbin 1 of Examples 1 to 9 and Comparative Examples 1 to 3, to prepare a yarn package.

Next, each yarn package of Examples 1 to 9 and Comparative Examples 1 to 3 is allowed to stand in an atmosphere of 5 ° C. for 12 hours, and then 25 G in an atmosphere of 5 ° C. using a vibration tester with a thermostat. Vibration was given 500 times, and when the wound glass yarn was unwound from the end of winding to the beginning, the number of yarn packages cut by the glass yarn was the total number of yarn packages used for evaluation without yarns By dividing, the incidence rate of no thread was calculated. The results are shown in Tables 1 to 3.

Next, each yarn package of Examples 1 to 9 and Comparative Examples 1 to 3 is allowed to stand in an atmosphere of 5 ° C. for 12 hours, and then 25 G in an atmosphere of 5 ° C. using a vibration tester with a thermostat. Vibration was given 500 times, and when the wound glass yarn was unwound from the winding end to the beginning, the wound glass yarn was unwound from the winding end to the position 5000 m before the beginning After that, using the fluff measuring device, the number of fluff generation was determined by counting the number of fluffs from the position 5000 m before the beginning to the beginning as the total number of fluffs per 333 m glass yarn. The results are shown in Tables 1 to 3.

 

 

 

 

 

 

From Tables 1 to 3, the height h of the annular convex portion 5 is in the range of 20 to 200 μm, and the distance d ₁ as the center-to-center distance between adjacent annular convex portions is in the range of 100 to 9400 μm. In Examples 1 to 9, the ratio d ₁ / h of the distance d ₁ as the center-to-center distance between adjacent annular convex portions 5 and 5 to the height h of the portion 5 is in the range of 3.4 to 75.0. According to the bobbin 1, it is apparent that the incidence rate of no threading is 34% or less, and the occurrence of no threading can be effectively suppressed.

Further, from Tables 1 to 3, the ratio d ₁ / h of the distance d ₁ as the center-to-center distance between adjacent annular convex portions 5 and 5 to the height h of the annular convex portion 5 is less than 3.4. According to the bobbin 1 of Examples 1 and 2 and the bobbin 1 of Comparative Example 3 in which d ₁ / h is more than 75.0, it is apparent that the yarn neckless incidence rate is 44% or more and the generation of yarn neckless can not be suppressed. It is.

1 ... bobbin, 3 ... cylindrical portion, 5 ... annular convex portion.

Claims (7)

A bobbin comprising a plurality of annular convex portions having a trapezoidal shape in a sectional view along the circumferential direction of a cylindrical portion for thread winding,
The height h of the annular convex portion is in the range of 20 to 200 μm,
The distance d ₁ as the center-to-center distance between adjacent annular convex portions is in the range of 100 to 9400 μm,
A bobbin characterized in that the ratio d ₁ / h of the distance d ₁ as the center-to-center distance between adjacent annular convex portions to the height h of the annular convex portion is in the range of 3.4 to 75.0. . In the bobbin according to claim 1, wherein the annular protrusion to the height h, the ratio of the distance d ₁ as the distance between the centers of the annular protrusions adjacent (d 1 _{/ h)} is 5.0 to 30.0 A bobbin characterized by being in the range of According to claim 1 or bobbin according to claim 2, wherein the annular protrusion is in the length _{W 1} in the range of 180 ~ 500 [mu] m of the upper base of the cross section trapezoidal, the lower base length _{W 2} of 180 ~ 800 [mu] m A bobbin characterized by being in the range. In the bobbin according to claim 3, wherein said annular protrusion is a ratio of the length _{W 1} of the upper base of the lower base to the length _{W 2} of the cross section trapezoidal _(W 1 / _{W 2)} is 0.90 to 1.00 A bobbin characterized by being in the range of The bobbin according to any one of claims 1 to 4, wherein an upper processing ratio of the yarn winding cylindrical portion is in a range of 50% or more. The bobbin according to any one of claims 1 to 5, wherein an upper processing ratio of the yarn winding cylindrical portion is in a range of 50 to 95%. A yarn package comprising a bobbin according to any one of claims 1 to 6, around which yarn made of glass fiber in the range of 0.3 to 2.7 tex (g / km) is wound.

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