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AssigneeKinsei Seishi Co., Ltd.
InventorsYasuji Yasumitsu, Osamu Sannomiya, Atsuko Oishi, Yasuyuki Yamazaki
Estimating the term…
There is provided a sheet for food extraction using no chemical such as a chemical binder or a paper-making aid, using an adhesive composite fiber as a raw material, exerting no influence on the global environment, being excellent in safety to the human body and sanitation, and satisfying performance such as bag-making processability, heat stability, uniformity in texture, extraction properties and prevention of powder leakage, by an air-laid sheet for food extraction produced by preparing a fiber web (1), by an air-laid process, which mainly comprises a heat-adhesive composite fiber (A) having a fineness of 1.0 to 4.5 dt wherein a sheath component as a low-melting component of a sheath-core type composite fiber or a low-melting component of a side-by-side type composite fiber has a melting point of 110 to 170° C., and performing interfiber bonding by heating to achieve integration.
1-5. (canceled)
An air-laid composite sheet for food extraction comprising at least two fiber web layers, wherein one fiber web is a fiber web (1) which mainly comprises a heat-adhesive composite fiber (A) having a fineness of 1.0 to 4.5 dt wherein a sheath component as a low-melting component of a sheath-core type composite fiber or a low-melting component of a side-by-side type composite fiber has a melting point (TmA) of 110 to 170° C., and a fiber web on the opposite side is a fiber web (2) with a basis weight of 2 to 30 g/m2 which comprises a mixture of a heat-adhesive composite fiber (B) having a fineness of 1.0 to 4.5 dt wherein a sheath component as a low-melting component of a sheath-core type composite fiber or a component on the low-melting side of a side-by-side type composite fiber has a melting point (TmB) of 130 to 200° C. and a high-melting synthetic fiber (C) having a melting point (TmC) of 200° C. or higher and a fineness of 0.5 to 7.0 dt;
A composite air-laid sheet for food extraction with a basis weight of 10 to 50 g/m2 produced by forming the fiber web (1) according to claim 1 by an air-laid process on one side of a wet nonwoven fabric comprising pulp and the said heat-adhesive composite fiber (A) mixed at a ratio of 97/3% to 70/30% by weight and having a basis weight of 2 to 30 g/m2 and an air permeability of 1.5 seconds or less, and laminating and integrating them.
Dependencies are inferred from the claim text.