CS262965B1 - Fiber reservoir for writing fluid - Google Patents

Abstract

The fiber reservoir of writing fluid is intended for writing instruments known as markers or markers. The fiber reservoir consists of a bundle of crimped chemical fibers, which are most often placed in a cylindrical package. The essence of the solution lies in the fact that 30 to 100% of the fibers in the bundle are hollow fibers, the number of cavities is 1 to 6 and the volume of the cavities is 5 to 60% of the fiber volume.

Description

The subject of the invention is a fibrous writing fluid container which is used in writing means known under the name of a marker or marker.

The prior art containers consist of a bundle of crimped chemical fibers placed in an insoluble container, the cross section of which is most commonly circular. The use of polyester, polyacrylonitrile and acetate fibers is most widespread. The free spaces between the fibers form a capillary-porous system which is filled with writing fluid.

Due to the compression of the fibers in the container and the action of the solvents contained in the writing fluids, the curls on the individual fibers in the bundle are partially or fully aligned, thereby disrupting the capillary-porous structure of the container and losing its desired capillary-porous properties. The writing properties of writing instruments deteriorate, in some cases they cease to write, in other cases there is a spontaneous flow of writing fluids from the cartridges. The low elasticity of the fibers results in the loss of the desired fiber bundle bulk and thus the loss of capillary-porous properties already during the preparation of the fiber container, which places high demands on both the fiber bundle preparation device and the device that coat the bundle with an impermeable package.

Disadvantages are overcome by the writing fluid container of the present invention.

- 1,262,965

SUMMARY OF THE INVENTION The container consists of a bundle of crimped fibers, 30 to 100% of which are hollow fibers. There may be 1 to 6 cavities in the fiber and the cavity volume, or the cross-sectional cavity size, constitutes 5 to 60% of the total fiber or cross-sectional volume.

The use of hollow fibers results in a substantial increase in the elasticity of the fibers, thereby achieving a significant increase in the curl stability and ensuring that the desired capillary-porous structure and thus the desired properties of the cartridges remain unchanged even after the fiber bundle has been sealed into the impermeable package. The means which are fitted with these containers are maintained throughout their storage and use.

The increased flexibility of the hollow fibers makes it possible to achieve the same capillary-porous volume of the container at its lower weight, which is due to the lower weight of the hollow fibers at their same outer diameter. This leads to a reduction in the consumption of fibrous material and a reduction in the weight of the product. The increased flexibility of the hollow fibers further facilitates the actual production of the fiber cartridges, both by manufacturing the base strand and placing the strand in an impermeable package.

As far as the fiber material is concerned, polyester fibers have proven to be the best, but the invention is not limited thereto. Fibers of other materials may also be used, such as acetate, polyacrilonitrile, and other synthetic fibers.

The invention is illustrated by the following examples:

Example 1

For the production of fiber containers with a diameter of 6 mm and a length of 90 mm

- 9 "

262,965, a blend of polyester fibers was used wherein 70% consisted of a hollow fiber having a unique fineness of 5.9 dtex. The fiber had a single cavity, which accounted for 12% of its volume, 30% of the fibers were filled with one fineness of 6.7 dtex. The total fineness of the fibers in the cartridge was 40,000 dtex. The cartridge was used in a conventional type of 2.0 mm fiber tip marker. The cartridge was filled with water-based ink.

Example 2

For the manufacture of fiber cartridges with a diameter of 8 mm and a length of 90 mm, 100% hollow polyester fibers with a single fineness of 3.5 dtex were used. The filament had one cavity which made up 60% of its volume. The total fineness of the fibers in the container was 60,000 dtex. The cartridge was used in a marker with a special plastic, fine writing tip of 0.8 mm diameter. The cartridge was filled with water-based ink.

Example 3

A mixture of polyacrilonitrile fibers was used to produce fiber cartridges with a diameter of 12 mm and a length of 90 mm, 50% of which were holophilic hollow fibers - one cavity with a single fineness of 2.4 dtex and 50% formed full fibers with a single fineness of 3.0 dtex . The total fineness of the fibers in the container was 280,000 dtex. The cartridge was used in a 5.0 mm diameter fiber tip marker. The cartridge was filled with ethyl alcohol-water ink.

Example 4

For the manufacture of fiber cartridges with a diameter of 8 mm and a length of 85 mm, 100% hollow polyester fibers with a single fineness of 3.5 dtex were used.

262 965

The area of the cavity formed 25% of the volume of fibers and it was a so-called quadrufile hollow fiber, ie. The cavity was formed by four separate channels within the fiber. The total fineness of the fibers in the container was 70,000 dtex. The cartridge was used in a marker with a special plastic tip fitted with a 0.8 mm diameter ball. The cartridge was filled with water-based ink.

Claims (1)

A writing fluid fibrous container consisting of a bundle of crimped chemical fibers most frequently located in a cylindrical package, characterized in that 30 to 100% of the fibers in the bundle are hollow, the number of cavities is 1 to 6 and the void volume is 5 to 60%.