JPH0521584B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a method for producing a sheet-like poultice. In this specification, a poultice refers to a paste-like drug containing an anti-inflammatory agent (menthol) or a cardiac drug (nitroglycerin). (Prior art and its problems) Conventional sheet-shaped poultices are, for example,
As described in Publication No. 20208, it is known that a pad layer containing a base material is applied on a base material made of polyurethane film, but the polyurethane film used as the base material has an elongation of 500%. The stretch rate was low, with a limit of ~600%, and the modulus was high, resulting in insufficient stretching and bending, resulting in the inconvenience that it easily peeled off when applied to areas with rapid movement, such as elbows and hips. Ta. Therefore, the applicant of the present application focused on using a condom-like thin latex sheet as the base material. However, conventionally, rubber sheets have been formed by rolling with calender rolls, but as mentioned above, condom-like thin latex sheets are thin and have low modulus, so they cannot be manufactured by rolling with calender rolls. This is impossible, and we focused on the fact that the immersion method is preferable, leading to the development of the manufacturing method of the present invention. (Problems to be Solved by the Invention) The present invention was devised in view of the above-mentioned problems of the prior art, and its purpose is to apply a glue-like drug to a thin latex base material. To provide a method for producing a sheet-like poultice that has a high elongation rate and is difficult to peel off. (Means for Solving the Problems) The technical means achieved by the present invention to achieve the above object is to add a continuous release liner to the peripheral surface of a rotatably supported drum, and to attach a continuous release liner to the lower part of the drum. The release liner is sequentially delivered by rotating the drum while being immersed in a natural rubber latex solution in a dipping tank provided, the solution is adhered to the surface of the release liner in a thin film, and the product is then sent into a dryer and vulcanized and formed. a latex base material forming step in which a condom-like thin film of natural rubber latex base material is provided on the surface of the release liner; a pad layer forming step in which a glue-like drug is applied to the surface of the natural rubber latex base material to form a pad layer; It consists of the step of rolling up the layer while attaching a release liner to the surface of the layer. (Function) By the technical means described above, a release liner prepared in a desired length is pulled out and wound from below around the circumferential surface of a drum rotatably supported by a drive mechanism, and the release liner is wound around the drum. When the lower part of the surface is immersed in a natural rubber latex solution and the drum is rotated, the release liner is sequentially fed out and rolled up while being immersed in the natural rubber latex solution, and the natural rubber latex solution adheres to the surface of the release liner in the form of a thin film. When the natural rubber latex base material is vulcanized and molded into a condom-like thin film on the surface of the release liner, it is sent out from the dryer in a two-layered state and sent to the bulge layer forming process. and move on. Next, in the two-layered state, a paste-like chemical is applied to the surface of the natural rubber latex base material, and a pad layer is formed on the surface of the latex base material, and a release liner is formed. The latex base material and the pad layer form a three-layered state, and when the winding process is carried out in this three-layer state, the release liner, the latex base material, the pad layer, and the release liner are attached to the surface of the pad layer. A four-layered sheet-like poultice is wound up. (Example) Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 shows the outline of the latex base material forming step 1, FIG. 2 shows the outline of the pad layer forming step 2 and the winding step 3, In the illustrated example, the latex base material forming process 1 and the pad layer forming process 2 are shown as separate processes, but it is also possible to form a series of continuous processes from the latex base material forming process 1 to the winding process 3. be. First, to explain the latex base material forming step 1, a drum 4, which is rotatably and vertically supported by a drive mechanism (not shown), is coated with a film made of polyester film, polyacrylamide, polyethylene, etc., with a thickness of, for example, 25μ. A continuous release liner a of about 100 mL is applied from the bottom surface to the top surface, and is pushed down into the natural rubber latex solution dipping tank 5 disposed below the drum 4 to be immersed in the natural rubber latex solution b'. Let it soak. Natural rubber latex solution b' uses a conventionally well-known composition such as natural rubber latex 100 parts sulfur 1.0 parts vulcanization aid 0.5 parts anti-aging agent 0.5 parts vulcanization accelerator 0.5 parts stabilizer 0.2 parts. The formulation examples are merely examples and are not limiting. Next, the drum 4 is rotated to send out the release liner a one after another, and the release liner a is dipped in a natural rubber latex solution b' to adhere the solution b' in a thin film form to the surface of the release liner a, and then transferred into the dryer 6. Send it in. In this embodiment, the drum 4 has a rotational speed of 0.5 m/min. The dryer 6 is equipped with, for example, a plurality of nozzles (not shown) inside, and blows hot air from the nozzles or arranges heating wires to vulcanize and mold the latex base material b, and the dryer 6 has a temperature of about 90°C. shall be carried out. Then, the release liner a and the latex base material b are formed into a two-layered state and sent out from the dryer 6 and wound around the first winder 7. At this time, the thickness of the latex base material is 80μ/DRY. Next, pad layer forming step 2 and winding step 3
To explain this, the two-layered material (release liner a and latex base material b) wound on the first winding machine 7 is sent to the glue-like drug applicator 8, and the surface of the latex base material b is glue-like drug
c' is applied and sent to the dryer 9. The paste-like drug c' may be any desired material such as an acrylic adhesive (acrylic emulsion, etc.) containing a drug such as nitroglycerin or menthol. Then, when it is dried at about 100°C in the dryer 9 and sent out, about 50μ/
The DRY pad layer c is formed in a multi-layered manner, and has a three-layered structure including the release liner a, the latex base material b, and the pad layer c. Then apply a release liner d to the bulge layer c.
A continuous sheet-like poultice A, which is formed into four layers of a release liner a, a latex base material b, a pad layer c, and a release liner d, is wound up by the second winding machine 10 while adhering the adhesive. After that, it is cut into any shape and size as necessary. Further, it is optional to incorporate an extraction step or the like as necessary. The extract liquid used in the above extraction step is 1
Dilute alkaline solutions such as % aqueous ammonia are preferred, but are not limited to. Here, the physical property values after manufacture are shown for reference.

【table】

[Table] Therefore, when using the sheet-shaped poultice A manufactured by the process described above, release liner a,
By peeling off each layer b, leaving only the pad layer c and the thin latex base material b, and pasting the pad layer c side on the body surface, the thin latex base material b will smoothly follow the movement of the body surface. Expand and contract. (Effects of the Invention) The present invention has the configuration as described above, and according to the manufacturing method of the present invention, the base material on which the pad layer is placed can be made of a natural rubber latex sheet and can be manufactured into a thin condom-like shape. It is possible to produce a sheet-like poultice that has a high elongation rate, is difficult to peel off, and has sufficient elasticity and flexibility. Therefore, the disadvantages of conventional products whose base material was made of polyurethane, namely, the fact that the base material had a low elongation rate, making the poultice easy to peel off from the body surface, have been fully resolved, and the needs of consumers have been fully resolved. It is very useful to be able to respond to the following.

[Brief explanation of the drawing]

The drawings show an example of the method for manufacturing the sheet-shaped plaster of the present invention, with FIG. 1 showing a schematic diagram of the latex base material forming process, and FIG. 2 showing a schematic diagram of the pad layer forming process and the winding process. In the figure, A: sheet-like poultice, a, d: release liner, b: latex base material, b': latex solution, c: pap layer, c': glue-like drug, 1: latex base material forming step. , 2: Pap layer forming step,
3: Winding process, 4: Drum, 5: Dipping tank,
6, 9: dryer, 10: second winder.

Claims (1)

[Claims] 1. A continuous release liner is attached to the circumferential surface of a rotatably supported drum, and the release liner is sequentially delivered by rotating the drum while immersing it in a natural rubber latex solution in a dipping tank located below the drum. a latex base material forming step of depositing the solution in a thin film form on the surface of the release liner, feeding the solution into a dryer and vulcanizing it to form a condom-like thin film of natural rubber latex base material on the release liner surface; A sheet-like material comprising a step of forming a pad layer by applying a glue-like drug to the surface of a base material, and a step of rolling up the pad layer while adhering a release liner to the surface of the pad layer. Method for manufacturing poultice.