Method for manufacturing sheet for use in tongue plaque cleaner
Provided is a method for manufacturing a sheet for use in a tongue plaque cleaner, capable of reliably cutting loops of thread members provided at a given density, and forming thread members each having a shape with an arc portion sufficient enough to scrape off tongue plaque, through steps that are simple, low-cost and suitable for mass production. A method for manufacturing a sheet 1 for use in a tongue plaque cleaner for scraping off tongue plaque, includes: a step of heating a sheet material having multiple looped thread members 2 protruding from one surface of the sheet material, at a temperature below the melting point of the thread members 2 ; and a step of forming first thread members 3, 8 and second thread members 4, 9 by cutting loops of the thread members 2 heated.
1. A method for manufacturing a sheet for use in a tongue plaque cleaner for scraping off tongue plaque, comprising:
a step of heating a sheet material having multiple looped thread members protruding from one surface of the sheet material at a temperature below the melting point of the thread members; and
a step of forming first and second thread members by cutting loops of the thread members that were heated, wherein
the loops of the threaded members are cut by multiple cutting devices as a result of horizontally moving the sheet material to pass beyond the multiple cutting devices, or by moving the multiple cutting devices in a direction parallel to the one surface of the sheet material while the sheet material is fixed,
all of the multiple cutting devices are fixedly arranged in a row in a direction perpendicular to a moving direction of the sheet material or multiple cutting devices,
the sheet material is heated in such a manner that the first and the second thread members maintain their shapes that were exhibited before cutting, and
a distance between the multiple cutting devices that neighbor each other in the direction perpendicular to the moving direction is larger than a distance between the thread members that neighbor each other in the direction perpendicular to the moving direction.
2. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein a top-vicinity region of the loop of each of the looped thread members is cut in a manner such that a tip end portion as a free end of each of the first and second thread members can be formed into a shape partially maintaining an arc shape of the loop.
3. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 2 , wherein the top-vicinity regions of the loops of the multiple looped thread members are cut by the multiple cutting devices arranged with cutting portions thereof facing the top-vicinity regions of the loops.
4. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein top-vicinity regions of the loops of the multiple looped thread members are cut by the multiple cutting devices arranged with cutting portions thereof facing the top-vicinity regions of the loops.
5. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein one of side parts of the loop of each of the looped thread members is cut to turn the first thread member into a substantially linear shape, and the second thread member into a reversed J shape.
6. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 5 , wherein any one of the side parts of the loop of each of the multiple looped thread members is cut by the multiple cutting devices arranged with cutting portions thereof each facing one of the side parts of the loop.
7. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein any one of side parts of the loop of each of the multiple looped thread members is cut by the multiple cutting devices arranged with cutting portions thereof each facing one of the side parts of the loop.
8. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein a site at which the loop of each of the multiple looped thread members is cut differs from the thread member to the thread member, and the multiple looped thread members are cut by the multiple cutting devices arranged with cutting portions thereof facing different directions ranging from a top-vicinity region of the loop to side parts thereof, thereby forming multiple thread members having different cutting sites.
9. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein the thread members are made of a thermoplastic resin.
10. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein a first cutting device group, a second cutting device group and a third cutting device group are provided,
each of said cutting device groups comprises the multiple cutting devices, and
each of the loops is respectively cut by each of the multiple cutting devices.
11. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 10 , wherein the cutting devices in the second cutting device group are provided in locations that are deviated away from the cutting devices in the first cutting device group in a direction of moving the sheet material or the multiple cutting devices.
12. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 10 , wherein the cutting devices in the third cutting device group are provided in locations that are deviated away from the cutting devices in the second cutting device group in a direction of moving the sheet material or the multiple cutting devices.
13. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein the sheet material is heated at 150 to 200° C. for 3 to 5 minutes.
14. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein each of the first and second thread members after cutting contains an arc shape portion sufficient enough to scrape off tongue plaque.
15. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein each of the multiple cutting devices has a blade surface and is fixed in a manner such that the blade surface faces upward against a top-vicinity region of each of the loops.
16. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 1 , wherein the multiple cutting devices have blades that face in various directions so that a plurality of thread members having different cutting sites are formed.
17. The method for manufacturing the sheet for use in the tongue plaque cleaner according to claim 16 , wherein an angle of each of the blades is in a range of 0 to 90 degrees with respect to the one surface of the sheet material.