JPS638153A - Manufacture for roll-like scroll of agricultural film improving fusion splicing aptitude and this scroll - Google Patents

Abstract

PURPOSE:To perform an intermediate splicing job for a film so easily, by running two cutters at a right angle to a forward direction of the film from both sides of the film, and sprinkling a tackiness reducer on an end part of the cut film. CONSTITUTION:A film F is wound up as in an arrow, and when a roll 4 comes into a state of being fully wound, two cutters 13 and 14 are made to run at right angles to a forward direction of the film F from both sides of the film F, cutting film F. A cut end of the film F comes to a convex part 11 at the preceding side but a concave part 12 at the succeeding side. Simultaneously this cutting or for a while before and after the cutting, powder for tackiness preventing is sprayed out of the sprayer installed in positions A and B or B' sprinkling it on the cut end. With this constitution, adhesion of the film F is prevented from occurring, thus an intermediate splicing job for the film F is made so easy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a roll-shaped agricultural soft vinyl chloride resin film.

More specifically, it is a roll-shaped roll of film used for intermediate processing with a high-frequency welder sewing machine or an ultrasonic welder sewing machine, and is a stand consisting of two rotatable rolls arranged parallel to each other at a regular interval on the welder sewing machine. This invention relates to a method for manufacturing a roll-shaped roll having excellent hollowing workability, in which the unwinding end of the film can be easily found and pulled out from the roll-shaped roll of the film when used by placing the film on top of the roll. It is a thing.

[Conventional technology]

The method for producing a continuous roll of synthetic resin film involves winding a predetermined amount of film onto a core, and when the roll is fully wound, the roll is emptied in the direction opposite to the direction in which the film travels. A winding core is placed, the film is cut with cutting blades near the front and back of the empty core, and the film is wound.

A known method for cutting a film is to run one cutting blade from one end of the film width to the opposite end in a direction unilateral to the direction in which the film-like material travels. ("Automatic Film Cutting Device in Winder, Patent Publication No. 42-2238, Conventional Example 1"). In this case, the film-like material (1) is cut into the shape shown in Figure 1 (a), and the film is rolled into a full roll. The film end shape is (2), and the film end shape at the beginning of winding is (3).
become.

On the other hand, a plurality of cutting blades are run perpendicular to the direction of film movement, and adjacent cutting blades are separated to an extent that they do not collide with each other, and the cutting blades run in different directions at approximately the same speed. There are also known methods. ([Cutting device for automatic winding machine for continuous strip products] Japanese Patent Application Laid-Open No. 50-8
7152, “Method for cutting thin film materials” JP-A-59-396
56, Conventional Example 2). In this case, the strips are shown in Figure 1 (b), (
The film is cut into planar shapes as shown in c), b), and (e), and the film end shape of the fully wound roll is (2), and the film end shape at the beginning of winding is (3). In addition, two cutting blades are moved from both sides of the film width in a direction perpendicular to the direction of film travel, spaced apart to the extent that they do not collide with each other, and run at different speeds. A cutting method has been proposed in which the traveling speed may be the same from the start to the end of cutting or may be changed multiple times.

(“Rolled film-like material” patent application 1986-2786)
15, Conventional Example 3). In this case, the film is shown in Figure 1 (to),
It is cut into a planar shape as shown in (g).

By the way, a full roll of agricultural soft vinyl chloride resin film can be used with a welder sewing machine or the like to fuse and join the ends of multiple films to a width large enough to cover a greenhouse for greenhouse horticulture. The film is hollowed out. When hollowing out two fully rolled rolls using a high-frequency welder sewing machine, the fully wound rolls are hollowed out using a high-frequency welder sewing machine.
(5) and (6) in Figures 3 and 4], and the film end of the fully wound roll is unraveled as the film unwinding start end, and the upper and lower electrodes of the high-frequency welder are (7), (19 are fused together, and the drive roll (
9) and crimp row? - Continuously move the film according to (10). Film (1) of full roll (4)
) How to pass the film through when unwinding is as shown in Figure 3.
There are two ways to pull it out directly, and a way to pull it out by passing it under the o-ru (5) as shown in Fig. Due to the force exerted by the film, the so-called roll flopping phenomenon in which the film lifts up on the mounting table rolls (5) and (6) tends to occur, and in this case, it becomes difficult to feed the film stably. The film threading method shown in Figure 2 is generally performed.

[Problem that the invention seeks to solve]

Agricultural soft vinyl chloride resin films are thin and contain a large amount of plasticizer, so when the films are rolled together, they are sticky and difficult to peel off. This tendency is especially strong for films with smooth surfaces that have no satin finish or crests when the filler is mixed in. Conventional example 1.2.
When hollowing out the fully wound roll-like material of No. 3 using a welder sewing machine, the end of the winding end of the film is peeled off by hand and guided to a part of the fusing roller to start joining. In this case, when the unwound end of the film is passed through the roll (5) shown in FIG. It has some serious drawbacks. This is because, in order to make it easier to pass the film through, the end of the film is first wound upward from the second row winding roll (4), and then the fully wound roll (4) is placed on the base roll (5).
, (6) and pull out the peeled end from the gap below the rolls (5) and (6), but the stickiness of the film at the peeled end is about the same as that of other parts of the film. Therefore, the peeled end portion is crimped between the fully wound roll (4) and the stand roll (5), and the loosened end portion is attached to the fully wound roll (4) again. In the case of Conventional Example 1, since the unwinding end of the film is at the end in the width direction of the fully wound roll, it is possible to lift one end of the roll and pull the unwinding end over the roll (5). Although possible, this method is difficult to implement with the fully wound rolls of Conventional Examples 2 and 3, and an improvement has been strongly desired in terms of improving efficiency during welding processing.

[Means to solve the problem]

In the present invention, when the film is fully wound, the two cutting blades are directed from both ends of the film toward the center, and run in a direction perpendicular to the film's traveling direction and cross each other near the empty winding core. In a continuous film winding method in which the film is cut by cutting the film and then wound around an empty core, the front part of the empty core and/or the empty core and the full roll are removed during a short period of time before or after the film is cut. A fusion bonding method characterized in that a substance having a stickiness reducing effect is supplied to a range of 50 to 2C4000- which substantially includes at least the apex of the cut edge of the film having a chevron shape on the film surface, in the middle part between The present invention provides a method for producing a roll of a soft vinyl chloride resin film for agricultural processing, and a roll.

The two cutting blades run at the same or different speeds, and the running speed of each cutting blade may be the same speed from the start to the end of cutting, or may be changed multiple times.

When winding the film around the air-wound core, it is preferable to use a water-soluble, organic solvent-based, or hot-melt adhesive on the winding core in order to securely wrap the film at the starting end.

The substance having a flattening reducing effect is supplied to the film surface so that the chevron-shaped apex of the cut edge of the film is substantially included in the width direction of the film.

"Substantially included" does not necessarily mean that it is completely supplied to the tip of the apex, but rather that it is supplied within a range that can substantially achieve the desired improvement in the unwinding properties of the chevron. The supply width of the flattening reducing substance to the film is 2
cIn or more, and extends to the film product excluding a width of 3 cIn at both ends. A portion of 3 m at both ends is not supplied in order to strengthen the adhesive force when overlapping during welder sewing machine joining.

Particularly preferably, the width of the cutting blades should be approximately symmetrical between the two cutting blades, and the width should be 2a11 from the intersection.
As mentioned above, it is preferable to supply the film symmetrically to an area within 1/2 of 4, whichever is shorter between the intersection and the end of the film product. When the supply width becomes wider, it becomes more likely that mistakes will occur during winding.

The start and end of the supply is controlled by interlocking with the winding length measuring machine and/or the cutting blade traveling mechanism.

It is of course possible to use other control methods and is within the scope of the present invention.

The supply of a substance that has a stickiness reducing effect to the film is as follows:
The front part of the empty winding core in the direction of film travel (Fig. 5B)
1 or B/ ) and/or at the intermediate portion between the empty winding core and the full roll (FIG. 5A). When feeding from the front of an empty winding core, it is possible to feed to the top of the film at position B in Figure 5 or to the bottom of the film at position B', but feeding at position B is more effective in preventing stickiness. Easy to obtain and preferred.

When the front part of the empty winding core is fed, as shown in Fig. 6 (S), both cut ends including the peak (U) at the end of the film of the full roll and the bottom (I) of the valley at the end of the film at the beginning of winding. It is possible to supply This product is preferable because, in addition to the effect of improving stickiness at the end of the film, it also has the effect of preventing the film at the bottom of the valley at the beginning of winding from being wrinkled at the beginning of winding around the winding core. The reason for this is that since the initial winding end has a valley shape, the winding starts from both the left and right cut ends of the film onto the winding core, and the left and right tension that occurs at the moment the film starts winding over the entire width of the film. When winding with a difference, the difference in tension between the left and right sides is absorbed and made uniform by supplying a substance that has the effect of reducing wrinkles on the film at the bottom by providing lubricity between the film and the winding core without causing wrinkles. This is due to the effect of

When the film is supplied at the intermediate portion (A) between the empty core and the fully wound roll, it can be fed only to the end portion of the fully wound roll as shown in FIG. 6(A), ←). A method of supplying both (A) and (B) is also possible.

The supply range of the substance that has the effect of reducing stickiness is 50~2o
, ooo CD. If it is less than 50-, no effect will be obtained. Even if it is supplied in excess of 2C%0OO-, there is no difference in the effect. The supply range is appropriately selected depending on the outer circumferential length of the core used, the width of the film, and the outer circumferential length of the fully wound roll. It is preferable to supply the film over a range of 5 m or more in the film traveling direction. More preferably, the range is 1/4 or more of the outer circumferential length of a fully wound roll at the end of the film winding, and the range is equal to or greater than the outer circumferential length of the winding core at the beginning of the winding.

As the substance having the effect of reducing stickiness, liquid or powder can be used. Silicone oil and fluorine compounds are suitable as the liquid substance.

As the powdered substance, powdered inorganic, organic, or metal substances can be used, and particles whose surfaces have been treated with other compounds are also suitable. Microencapsulated powders of liquids can also be used. Examples of inorganic powders include calcium carbonate, magnesium carbonate, aluminum hydroxide, feldspar, quartz, hydrated magnesium silicate, mica, tetrasilicon mica, silicic anhydride, aluminum silicate, talc, talc,
Examples of organic substances such as clay include starch, polyacrylate, polyvinyl chloride, polyvinyl alcohol, partially saponified polyvinyl alcohol, metal salts of fatty acids, fatty acids, fatty acid amides, fatty acid bisamides, polyethylene, polypropylene powder, etc. Metals include iron. ,aluminum,
Copper, brass, etc. are suitable, but are not limited to these as long as they have the effect of reducing stickiness. Among these, starch powder or products coated with starch powder on the surface are suitable from the viewpoint of safety to the human body during handling, anti-blocking property of the powder itself, and stickiness reduction effect.

The particle size of the powdery substance is preferably 1 to 50 μm.

The methods of supplying these substances to the film surface include coating, spraying, gravity-dropping, suctioning using electrostatic force,
And a combination of these methods can be used. A suitable supply amount is 0.05 to 5 f/-. If the amount is less than 5t/m", the effect is insufficient, and if it exceeds 5t/m, the effect remains unchanged. A more preferable amount is 0.16 to 59/rrl.
It is. When the film is wound up, even if it is supplied to one side of the film, when the film is rolled up, it will be dislocated to the other film surface as well, so it is sufficient that the above-mentioned amount is present between the layers of the stacked films.

〔Example〕

The present invention will be explained below with reference to Examples. However, the present invention is not limited to the examples.

In manufacturing a transparent agricultural soft vinyl chloride resin film with a thickness of 0.1' x 1 width of 300 cm and a length of 100 m, two cutting blades (13L (14) shown in Fig. 5 are cut from both ends of the film toward the center. A powder spray spreader was installed at the point A or B of a continuous film winding device that could run and cut the film, and rolls as shown in Table 1 were obtained.

The amount of powder supplied was determined by the shape of the supply port of the spreader, and the length of supply was determined by adjusting the timer at the time of starting supply.

The supply stop was synchronized with the crossing of the two cutting blades.

The timing at which the two cutting blades start cutting the film is as follows:
The winding of the left and right films was adjusted so that the starting ends were wound around the blank core at the same time. In addition, the two cutting blades were run as far as the intersection to ensure film cutting.

The roll-shaped material shown in Table 1 was hollowed out using the high-frequency welding machine shown in Fig. 2, and the ease of pulling out the film, the fused state of the hollowed part, and the wrinkles in the valley-shaped film part at the beginning of winding of the core were checked. The state of entry was evaluated. The results were as shown in Table 1.

Explanation of items listed in Table 1 Traveling speed ratio of two cutting blades: l: The running speed of the two cutting blades is the same.

2: The running speed of one cutting blade is twice that of the other cutting blades.

Spreader installation location: A: Site shown in Figure 5A.

B: Site shown in FIG. 5B.

Parts where powdery material is supplied to the film: C: Part including the chevron-shaped apex at the end of the film in Figure 6 (G), (S), ←).

D: A region including the bottom of the valley at the beginning of the film winding in FIG. 6 (IJ).

gag6 (see figure 6)) from the end of the film to the entire middle of the film.

F: A region having a distance of 50 openings from the chevron apex (n) at the end of the film in FIG. 6(3) to the boundary of the powder supply section.

Powder supply amount: Measured value at the maximum center in the width direction of the film where powdery substances are attached.

Powder supply length: Measured value of the largest important part in the longitudinal direction of the film where powdery substances are attached.

Powder supply area: Measured area of part with powdery matter.

Amount of powdered material supplied: Cut off the powdery part from a fully rolled roll with two layers stacked together with the lower layer film at a constant plane gI(S-).

Wipe the outer surface of the two-layered film with a cloth to reduce the weight (Wtf) of the two-layered film to 1/. After measuring up to oo', wipe off the powdery matter adhering to the surface of the two stacked sheets with a cloth and measure the film weight (w, ?) again.

(W□-W=　)　x-value calculated by 1-cho-11.

Ease of pulling out the film: Two rolls of high-frequency welder thin film (5
) and (6), place the fully rolled material (4) shown in Table 1 on the stand.
), and evaluated the workability when unwinding the film by letting the unwinding end hang out on the roll (5).

○; Put your hand between the rolls (→, (6)) and easily loosen and pull out the end.

△: Slightly difficult to pull out the end.

×; When the film was loosened by inserting a hand between the rolls (5) and (6) and grasping the loosened end, the end of the film did not come out easily and it took time to pull it out, resulting in poor workability.

Hollow part fused state -1 piece ○: Completely fused.

Δ: When the fused portion is peeled off, it peels off with resistance.

×: When the fused portion is peeled off, it peels off without resistance.

The winding of the valley-shaped film portion was wrinkled and wrinkled: Each roll was wound 10 times #1 and the frequency of wrinkles was evaluated.

○; All 10 books have no wrinkles.

Δ: -1 to 2 out of 10 have short wrinkles.

9 to 8 have no wrinkles.

x: Long and short wrinkles are present in ~10 out of 10 lines.

〔Effect of the invention〕

The roll-shaped roll of the present invention can be extremely easily unrolled during live processing on a welder sewing machine, and is extremely useful in improving the work efficiency of live processing. In addition, there was no adverse effect on film performance caused by supplying a substance having a flatness reducing effect, and the desired improvement in winding #1 combing properties during hollow processing could be achieved. Furthermore, if the substance is also supplied to the portion D in FIG. 6(S), it is possible to prevent the wrinkles that tend to occur in the valley-shaped film from wrapping.

[Brief explanation of drawings]

FIG. 1(A) shows the cut shape of the film of Conventional Example 1, and FIG. 1(B) shows the cut shape of the film. e→, ni), (e) are the cutting shapes of conventional example 2, (e), (
2) is a side view of the welder sewing machine; 3) is a partial side view showing another method of drawing out the film of the welder sewing machine; 4) is a plan view of the welder sewing machine; Figure 5 is a side view of the powder supply part of the example, and Figure 6 (b), (+7), 5')) is a diagram of the film cut shape and powder supply part of the example, Ql, (3) 2 is a diagram of the film cut shape and powder supply portion of a comparative example. (1) Film-like product (2) Film end shape (3) Film end shape at the beginning of winding (4) Fully rolled product (5), (6) Roll on stand (7), (8) High-frequency welder Upper and lower electrodes (9
) Drive roll (10) Pressure roller (11) Chevron-shaped top at the end of the film (12) Valve-shaped bottom at the end of the film at the beginning of winding (1a), (
1. Cutting blades A, B, B' supplying part of the substance that has the effect of reducing stickiness C. Powder supplying part including the peak at the end of the film Powder supplying part B including the trough at the end of the film at the beginning of winding ,? The shorter length of the end cloth in the intersection film product where the powder supply part of the comparative example is cut

Claims (4)

[Claims] (1) When the film is fully wound, two cutting blades are run in a direction perpendicular to the direction of film travel and intersect, with each of the two cutting blades pointing toward the center from both ends of the film near the empty winding core. In the continuous film winding method, in which the film is cut by cutting the film and wound around an empty core, the front part of the empty core and/or the empty core and the full roll are It is characterized by supplying a substance having a stickiness reducing effect to a range of 50 to 20,000 cm^2 that substantially includes at least the apex of the cut end of the film having a chevron shape on the film surface, in the middle between A method for producing a roll of agricultural soft vinyl chloride resin film for fusion bonding processing. (2) The method for manufacturing a roll according to claim 1, wherein the substance having a stickiness reducing effect is not supplied to both ends in the width direction of the film. (3) In a roll of film using a cylindrical winding core, the shape of the cut end of the film at the beginning of winding is a valley shape, and the shape of the cut end of the film at the end of winding is a chevron shape. Agriculture for fusion bonding processing, characterized in that at least the terminal end of the chevron is wound with a substance having an effect of reducing stickiness of the film interposed in a range of 50 to 20,000 cm^2 substantially including the apex of the chevron. A roll of soft vinyl chloride resin film. (4) The roll-shaped material according to claim 3, in which no substance having a stickiness reducing effect is present at least in the 3 cm width portion of both ends in the film width direction.