JP-2026075343-A - Seaweed mat

Abstract

[Problem] To provide a nori mat that has good adhesion of nori to the mat, good peelability from the nori mat after drying, good moldability of the nori, and a low defect rate due to tearing, etc. [Solution] A nori mat comprising a plurality of resin strips arranged substantially parallel to each other, and a mat thread for weaving the resin strips together, wherein 10% or more of the total number of resin strips constituting the nori mat are resin strips having an asterisk shape with 6 to 12 protrusions, and the asterisk ratio d calculated from formula (1) is in the range of 1.1 to 1.5. d=Ap/Av formula (1) Ap: Distance from the center of the resin stencil to the top of the asterisk (μm) Av: Distance from the center of the resin skein to the bottom of the asterisk valley (μm) [Selection Diagram] Figure 1

Inventors

• 鬼塚 研史
• 宮山 省一
• 中村 圭一
• 橋本 卓也

Assignees

• ＪＮＣ株式会社

Dates

Publication Date

20260508

Application Date

20241022

Claims (8)

1. A nori mat comprising a plurality of resin ratches arranged in roughly parallel directions, and a mat thread for weaving the resin ratches together, A seaweed mat in which 10% or more of the total number of resin strips constituting the mat are resin strips having an asterisk shape with 6 to 12 protrusions, and the asterisk ratio d calculated from formula (1) is in the range of 1.1 to 1.5. d=Ap/Av Formula (1) Ap: Distance from the center of the resin stencil to the top of the asterisk (μm) Av: Distance from the center of the resin skein to the bottom of the asterisk valley (μm)
2. The nori mat according to claim 1, wherein the resin strips are twisted 0.1 to 10 times per 10 cm in the longitudinal direction.
3. The nori mat according to claim 2, further comprising the stretched resin strips.
4. The nori mat according to claim 3, wherein the stretching ratio of the resin strip is 6 to 12 times that of the unstretched resin strip.
5. The nori mat according to claim 1, wherein the peel strength P of the dried nori from the nori mat is in the range of 2N to 6N, and the adhesion force h of the nori to the nori mat calculated from formula (2) is in the range of 6 to 20. h=P×S formula (2) P: Peel strength S: Nori Foot Sensory Evaluation Value Here, the Nori Foot Sensory Evaluation Value S is a sensory evaluation of the length of the nori fibers that protrude from between the nori racks, using a scale from 1 to 5.
6. The nori mat according to claim 1, having a configuration in which resin strips having an asterisk shape and resin strips not having an asterisk shape are arranged alternately in any way.
7. The nori mat according to claim 1, wherein the resin strip contains a filler.
8. The nori mat according to claim 1, further using wooden skewer.

Description

This invention relates to a nori mat that provides good adhesion for nori seaweed and allows for easy removal. Generally, nori (seaweed) is produced by harvesting nori from nori nets, shredding it to an appropriate size, mixing it with fresh water to obtain a nori suspension adjusted to the desired concentration, then forming the suspension on a nori mat attached to a nori manufacturing apparatus, further dewatering it by pressing it with a sponge or the like, drying it with hot air circulating in a drying chamber, and finally peeling the dried nori from the mat outside the drying chamber. Nori (seaweed) is harvested from autumn to spring, but its adhesion to the mats varies depending on the region, growth conditions, and harvest time. This difference in adhesion can affect the shrinkage of the nori after it has been processed on the mats, and can also cause tearing when the nori is removed from the mats. While many improvements have been made to various parts of nori processing equipment to address this problem, it has not yet been fully resolved. Meanwhile, improvements are also being made to seaweed drying racks. Patent Document 1 discloses a seaweed drying rack that uses metal skewered sticks to improve heat conductivity and promote the drying of seaweed. This metal skewer is twisted in the longitudinal direction to adjust the adhesion force of the seaweed, and its cross-section is also disclosed to be polygonal. However, in the technology described in Reference 1, uneven heat distribution could lead to uneven drying and deformation of the seaweed due to thermal shrinkage, potentially causing poor peeling and tearing. Furthermore, since the seaweed mat is a consumable item, repeated exposure to excessive heat on the metal skewer could accelerate deformation of the mat and deterioration of the threads used to tie the skewer, potentially shortening its usable period. While the illustration shows a metal skewer with a hexagonal asterisk cross-section, obtaining an asterisk shape through integral metal molding is difficult, and the actual examples do not describe the effectiveness of using a hexagonal shape. To improve the release properties from the nori (seaweed) mat, a type of nori mat is known that uses a ratchet obtained by adding a silicone composition to an olefin-based or polyamide-based resin. While this type of nori mat can improve user convenience by varying the amount of silicone composition added depending on the nori's origin, it has the problem of increasing the variety of seaweed and complicating product management. Due to these problems, methods of directly applying fluorine-based or silicone-based solvents to the surface of seaweed mats are being considered. However, direct application of fluorine-based solvents raises concerns about PFOS (Per Fluoro Octane Sulfonic Acid) contamination. While direct application of silicone-based solvents is an effective method, because it is a surface coating, the effectiveness of the silicone-based solvent diminishes with repeated use. Therefore, repeated application is necessary, and there are concerns about the environmental impact due to the increased amount of solvent applied. Japanese Patent Publication No. 6295109 (Japanese Unexamined Patent Publication No. 2015-171343) Figure 1 is a photograph showing the side view of a seaweed mat obtained by alternating arrangements of resin strips having an asterisk shape with eight protrusions and resin strips having a hexagonal cross-section (Example 1).Figure 2 is a photograph showing the side view of a seaweed mat in which resin strips having an asterisk shape with 10 protrusions and resin strips having a hexagonal cross-section are arranged alternately (Example 2). The following terms are used in this specification: Resin tickets and wooden tickets are sometimes simply referred to as "tickets." Resin tickets refer to all tickets made of resin. Generally, "raw nori" refers to freshly harvested, undried nori, and "dried nori" refers to nori that has been dried from raw nori, but in this specification, it is simply referred to as "nori." "Nori feet" refers to the nori fibers (thalli) that protrude from between the tickets that make up the nori mat. "Nori feet are standing (deep)" means that the nori fibers protrude sufficiently from between the tickets. "Approximately parallel" means that it is sufficient for the nori mat as a whole to appear roughly parallel, and "arbitrary" means that there are no particular rules regarding the form or arrangement of the tickets. "Wood" is used in this application as a general term for plants with hardened parts, such as bamboo and reeds, as well as trees, and "wooden" means that the raw material is derived from these "woods." The embodiments of the seaweed mat of the present invention will now be described. The seaweed mat of the present invention comprises a plurality of resin strips arranged substantially parallel to each other, and a mat thread for weaving the resin stri