JPH0557866A - Production of symmetric pattern flat foil having core material sheet - Google Patents

Abstract

PURPOSE:To rapidly produce an inside and outside symmetric pattern flat foil having a core material sheet by one process without developing positional shift, tensile strength difference or hue and brightness difference. CONSTITUTION:Inside and outside symmetric raw material sheets are passed through pasting rolls 6, 6a and drying chambers 4, 4a in symmetric directions through drive rolls and guide rolls to be supplied to the nip between nip rollers 5, 5a especially downwardly and a core material sheet 2 is suspended to the gap between said sheets under constant tension. The supply systems of both raw material sheets 1, 1a are adjusted in speed while the driving forces thereof are changed using positioning mark sensors 10, 10a to perform the alignment of inside and outside patterns and both raw material sheet supply systems and the supply system of the core material sheet 2 are regulated using tension control rollers 11a, 11b and an inside and outside symmetric pattern flat foil having no twist is produced by one process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a flat foil, in which flat foils having a symmetrical pattern on the front and back sides with a core material interposed are continuously produced.

[0002]

2. Description of the Related Art In general, various types of flat foil manufacturing apparatuses have been developed which have the same pattern on the front and back. Therefore, it is possible in principle to manufacture a flat foil with a reinforcing core material interposed by using this apparatus. That is, it can be carried out by gluing one raw material for the flat foil and the core material and then gluing the other raw material on the surface of the core material to which the raw material is glued. However, in practice it is extremely difficult to obtain a complete product by this method.

In general, when manufacturing a flat foil original sheet having the same pattern on the front and back sides, a step is adopted in which the original sheet passes through a suitable guide roll and a sizing roll from the symmetrical direction and is sandwiched between the nip rolls. , The position of both originals is detected by using a bar code previously applied to the edge portion, and one or both of the drive rolls for supplying both originals are speed-adjusted to obtain the same pattern on the front and back sides. ing.

The production of a flat foil having the same pattern on the front and back sides containing a core material is theoretically possible by repeating two steps of the production process of the flat foil having the same pattern on the front and back sides without interposing the core material, but the product value is extremely low. I can only get it. That is, after one step is completed, 48
If left unattended for more than a period of time to mature, the expanded state due to the glue remains and the tensile state is extremely unstable, resulting in wrinkles.

Further, in the two steps, the paste application state which is the same as or at least close to the one step cannot be obtained. In other words, urethane, acrylic, polyester, etc. are used as the sizing agent, but in one step, the sizing agent is prepared in one place and divided into the sizing parts of both raw materials, so that the sizing agent of almost the same state is prepared. Although the agent can be obtained, a sizing agent in the same state cannot be obtained if a time difference of 48 hours is given. Naturally, since the two layers and the one layer have different tensions, it is difficult for the same pattern to appear, which makes adjustment difficult.

A fine front and back identical pattern is required in the production of a flat foil. However, as described above, when the flat foil containing the core material is manufactured in two steps, discoloration difference occurs on the front and back sides due to the non-uniformity of the sizing agent due to the time difference. The sizing agent usually volatilizes the contained solvent to give adhesive strength, but the adhesive component and the volatile component of the sizing agent give some discoloration to the pattern in the sizing step. Therefore, in the two-step gluing, it must be said that it is extremely difficult to obtain the same color tone and brightness on the front and back.

[0007]

The problem to be solved is that when a flat foil having the same pattern on the front and back sides is manufactured from a symmetrically-patterned original sheet with a core sheet interposed, it is produced by gluing in two steps. Developed in view of the fact that flat foils with the same pattern on the front and back, which have the same fine color tone and brilliance, are not obtained,
Further, it was developed to simplify the process that can be carried out immediately after the winding of the original fabric after the winding.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a patterned original fabric is moved from a facing direction through a supply roll, a guide roll, and a gluing roll, particularly from the upper side to the lower side of the nip rolls. By the method of hanging down the core sheet with a constant tension and winding it up, a flat foil with the same pattern on the front and back with the core sheet intervening is manufactured in one step, and there is a difference in color tone to make the front and back patterns of the product into two steps. A desired number of flat foils with the same pattern on the front and back sides were obtained by simplifying the number of steps without giving them. Specifically, the patterned original fabric was passed through a drive roll, a guide roll, a pasting roll, and a drying chamber, especially a nip roller. The original fabric supply system for descending is arranged at symmetrical positions with respect to the nip roller, both original fabrics are transferred by performing pattern alignment and tension adjustment, and the core sheet is hung between the nip rolls with a constant tension. layer Featuring a method of manufacturing a symmetrical pattern flat foil with a core sheet for winding products, and driving torque prime mover of both raw material supply systems is driven by a transmission in one system and a sensor compatible transmission in the other system Characterized by a method of manufacturing a symmetrical pattern flat foil having a core material sheet in which rollers are driven to each other and a positioning mark sensor provided in both systems obtains precise positioning patterns on the front and back sides. The method is characterized in that a tension controller is provided in the, and the tension is adjusted by interlocking all the tension controllers with each other to adjust the tension, thereby producing a symmetrical flat foil having a core sheet.

[0009]

[Embodiment] Original fabrics 1 and 1a having symmetrical patterns on the front and back are long products made of a plastic film or the like and have alignment marks such as a bar code or a group of small holes on the ears. Supply as. Since the transition process from the original fabrics 1 and 1a to the nip rolls 5 and 5a is the same for both original fabrics, only one transition process will be described.

The raw fabric 1 passes through a drive roll, a guide roll group, and a gluing roll 6. The gluing roll 6 is immersed in an adhesive tank 3 containing an adhesive such as urethane, acryl, polyester, etc., and the adhesive applied to the roll surface is transferred to the raw glue-adhering surface. It is a roll assembly that is appropriately pressed. The raw material coated with the adhesive is passed through the drying chamber 4 with the surface coated with the adhesive as an outer side to volatilize some volatile components such as a solvent, and further to remove moisture to improve the adhesive strength. Guide from the top to the middle.

In the present invention, in particular, both original fabrics are guided from the upper side of the nip rolls 5, 5a, and a core material sheet 2 such as a nonwoven fabric, a film or paper is interposed between the both original fabrics. The core sheet 2 passes through the guide rolls and the tension controller
The tension is adjusted by 11, and the nip rolls 5 and 5a are hung down between the original fabrics coated with the adhesive. The core material-containing raw material A obtained by being pressed by the nip rolls 5 and 5a is
The product flat foil is wound on a winding roll 12.

Both the original fabrics 1 and 1a and the core material sheet 2 need to be aligned during the feeding process and a transitional adjustment for tension adjustment is required. The drive rolls of the two original fabrics 1 and 1a are arranged directly downstream of the original fabric rolls, and the original fabric 1 includes the torque type prime mover 7 to the transmission 8
The raw fabric 1a is driven from the prime mover 7 through the sensor-compatible transmission 9. Mark sensors 10 and 10a such as bar codes are arranged directly upstream of the nip rolls 5 and 5a, and the signals of the mark sensors 10 and 10a are transmitted to the sensor-compatible transmission 9 so that the pattern alignment of the two originals 1 and 1a is performed. To do. Further, tension controllers 11, 11a and 11b are arranged at the positions of the guide rollers downstream of the original fabrics 1 and 1a and the guide rollers used for the core sheet 2 so as to make the mutual tension constant. Further, it is of course possible to configure a guide sensor for preventing lateral deviation of the original sheet at a desired portion, if necessary.

[0013]

According to the method of the present invention, the left and right patterned original fabrics are lowered through the gluing roll and the drying chamber, especially between the nip rollers, and at the same time, the core sheet is hung between the nip rolls to form a three-layered core sheet. Since a flat foil with a symmetrical pattern is manufactured, it is not a two-step manufacturing process, so it is possible to use a sizing agent under the same conditions. A flat foil with a core material having the same front and back patterns in every detail, which is not induced, can be manufactured easily and quickly. Furthermore, the original fabric supply speed of both original fabric supply systems is controlled by using the positioning mark sensor, and the tension force is adjusted by the tension controller between both original fabric supply systems and the core material supply system. It is possible to manufacture a symmetrical flat foil having a core sheet that is the same and that is not twisted due to a difference in tensile force. Furthermore, the flat foil having a symmetrical pattern on the front and back can be cut immediately after winding, the post-treatment process can be simplified, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a flow sheet showing a manufacturing method of the present invention.

[Explanation of symbols]

 1, 1a Raw fabric 2 Core material sheet 3, 3a Adhesive tank 4, 4a Drying chamber 5, 5a Nip roll 6, 6a Gluing roll 7 Torque type prime mover 8 Transmission 9 Sensor compatible transmission 10, 10a Mark sensor 11, 11a , 11b Tension controller 12 Winding roll A Core material with core material

Claims (3)

[Claims] 1. An original fabric supply system for passing a patterned original fabric through a drive roll, a guide roll, a gluing roll, and a drying chamber, and in particular, descending between nip rollers, is arranged symmetrically with respect to the nip roller. A method for producing a symmetrical flat foil having a core sheet, wherein a raw material sheet is transferred by performing pattern alignment and tension adjustment, and a core sheet is hung between nip rolls with a constant tension to wind a three-layer product. 2. The positioning according to claim 1, wherein the driving torque prime movers of the two raw fabric supply systems are driven by the transmission in one system and the drive rollers are driven in the other system by a sensor-compatible transmission, thereby positioning the two systems. A method for manufacturing a symmetrical flat foil having a core sheet, which enables precise positioning patterns on the front and back sides using a mark sensor. 3. The tension controller according to claim 1, wherein a tension controller is provided in both the original fabric supply system and the core material supply system,
Adjust tension by interlocking all tension controllers,
A method for producing a symmetrical flat foil having a core sheet.