Ink reservoir tubes for writing instruments, refills for writing instruments, and writing instruments

Abstract

The present invention discloses an ink storage tube for writing utensils, the ink storage tube containing a resin which contains a biomass material that is composed of a polyolefin resin. The content ratio of the biomass material may be 80% by mass or less. The resin additionally contains a non-biomass material; and the non-biomass material may be a polyolefin resin.

Claims

1. An ink reservoir tube for writing instruments containing resin, The aforementioned resin consists solely of polyolefin resin. The aforementioned resin comprises a biomass material and a non-biomass material. The polyolefin resin constituting the non-biomass material is polypropylene resin. An ink reservoir tube for writing instruments, wherein the polyolefin resin constituting the biomass material is high-density polyethylene resin or polypropylene resin.

2. The ink container for a writing instrument according to claim 1, wherein the biomass material content is 80% by mass or less.

3. The ink reservoir tube for writing instruments according to claim 1, wherein the flexural modulus of the biomass material is 100 to 2100 MPa.

4. The water vapor permeability of the biomass material is 25 g / m³ under the conditions of 40°C and 90% RH. ２ - atm・24hr / 25μm or less, The oxygen permeability was 20,000 mL / m³ under conditions of 20°C and 90% RH. ２ - An ink reservoir tube for a writing instrument according to claim 1, wherein the particle size is atm·24hr / 25μm or less.

5. An ink reservoir tube for a writing instrument according to any one of claims 1 to 4, A writing instrument core comprising ink contained in the aforementioned writing instrument ink storage tube.

6. A writing instrument having a core for a writing instrument as described in claim 5.

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