JP2000238487A - Ink holder for felt-tip pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a felt-tip pen constituted all of a 'non-halogen' substance and having a smaller environmental pollution in the case of discarding it and to provide an ink holder for the felt-tip pen capable of being inexpensively manufactured at a manufacturing speed not different from that of prior art in its manufacturing method. SOLUTION: An ink holder for a felt-tip pen comprises fibers for constituting an intermediate felt-tip core for constituting the holder, felt-tip core fibers connected to the core to constitute a writing part, a coating material cylindrically coating at least the core fibers and a hot-melt adhesive coating the coating material and adhesively fixing the coating material, all formed of non-halogen compound components. In this case, a thickness of the coating material is preferably 15 to 45 μm. As the hot-melt adhesive, a polyester, polyurethane, polyamide, styrene-butadiene, styrene-isobutylene, or ethylene-vinyl acetate compound is preferably used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink holder for a felt-tip pen, in which all the materials constituting the ink carrier of the felt-tip pen are made of non-halogen compounds.

[0002]

2. Description of the Related Art A felt-tip pen can be roughly divided into a "center" portion for holding ink, a "tip" portion for taking out ink from the center and actually used as a writing portion,
It is composed of a "covering material" part that covers them all. Of course, in recent years, there has been developed a type of pen which does not use the "core", which is called a direct liquid type, but many of the above-mentioned "core" use types are still being commercialized.

[0003] The center core of this type of felt-tip pen using the center core is further made of a coating material comprising a fiber bundle portion for holding ink and a film for coating the fiber bundle portion. Note that the fiber bundle portion holding the ink may have an integral structure in which the tip itself also serves as a core portion used as an actual handwriting portion, but generally, the core portion is separately prepared. In general, the structure is connected to a fiber bundle holding ink. And in this specification,
In order to avoid the complexity of making such distinctive expressions, it is assumed that a medium-core type ink carrier is used in a meaning that encompasses both of the above.

[0004] By the way, as the ink holding fiber bundle of the core type, a low-melting adhesive fiber is mixed in an appropriate amount into the fiber bundle, and the adhesive fiber on the outer portion of the fiber bundle is heat-treated. In some cases, the coating material that is melted and used as the outer skin is replaced.However, in this case, it is very difficult to form a storage medium that can hold a large amount of ink and has an appropriate flowability. There is a problem that the outer skin portion does not become a good outer skin such as a film-like material, and there is a problem that the stored ink leaks and a short pass occurs, so that it is still unsatisfactory at present.

[0005] Therefore, a core-core type ink holding fiber bundle generally has a structure comprising a fiber bundle and a coating material for covering the outside of the fiber bundle with a film material. In other words, this coating material naturally uses an adhesive in order to cover the outer surface of the fiber bundle and fix the coating state, and the adhesive is applied to at least a long side of the film in a strip shape or a long shape. It has been applied along.

As a film of the coating material, a film of a synthetic resin such as polyester, nylon, polypropylene, or polyethylene, or a film of cellophane or the like is used. In the production process, the adhesive applied to the adhesive must be easily melted and solidified, and a thermoplastic resin such as polyvinyl chloride or polyvinylidene chloride is used.

Recently, in the felt pen industry,
When a used felt-tip pen is incinerated, the danger of "dioxin" generation has been pointed out by using chlorine-containing compounds for parts. Then, the development of those using "non-halogen-based substances" for all members constituting the felt-tip pen has been required.

[0008]

Most of the members of the felt-tip pen have recently been replaced with those using "non-halogen-based substances". However, the "core" has the following difficult problems. It was in that state. That is, "the core"
The method of manufacturing is different, but the films must be joined together and bonded by heat, such as the joint of paper covering material that covers the outer peripheral surface of tobacco leaves, and the processing speed at this time Is required to be extremely fast. Therefore, the adhesive used must be easily melted by a slight heating and solidify as soon as the heat is removed. Conventionally used thermoplastic resins such as vinyl chloride and vinylidene chloride satisfy the required performance and have been widely used. However, this one has to give up its use due to the problem of environmental pollution.

[0009]

In view of the above problems, the present inventors have conducted various studies on the relationship between a "non-halogen" adhesive and its film material, and have reached the present invention. That is, first, the adhesive is, of course, a "non-halogen-based" substance. Even if it is processed in the usual processing steps of a felt-tip pen, it can obtain the same adhesiveness as the conventional adhesive pen. When used as a film roll, the adhesive must not dissolve or adversely affect the ink contained in the film. It is compatible with the resin component used in the film and does not peel off. "Polyester-based", "polyurethane-based" adhesives satisfying the above conditions that they have good releasability when actually processing from a shape, and that they can be released without difficulty even at high speeds It has been found that synthetic resins such as "polyamide", "styrene-butadiene", "styrene-isobutylene", and "ethylene-vinyl acetate" are preferable. Among them, especially "polyester type" and "ethylene-vinyl acetate type"
Those made of resin are more preferable.

The resin selected here may be formed by heat-melting or dissolving in a solvent, thinly coating one or both surfaces of the film, and forming a film on the film surface. As for the resin capable of forming a film by itself, a method of once forming a film only with the adhesive component and laminating the film to one coating material film may be adopted.

As described above, the coating material film coated with the adhesive component obtained as described above must be heated at a high speed to bond the films together. However, in order to perform this processing at a high speed, a problem arises in that the applied adhesive is heated only for a very short time, and this problem must be overcome. That is, the actual heating is
Since the coating is performed through the coating film layer, the thickness of the coating film layer is important.
It turned out that m-45 micrometers is preferable. Furthermore, 20
μm to 30 μm are more preferred. The thickness is 15
If it is less than μm, the thickness of the coating material film layer is too thin, and it is easily broken, which is not preferable.

[0012]

According to the present invention, there is provided a writing implement with low environmental pollution, in which all of the felt pens, including other members, are made of a "non-halogen" substance by using the constitution of the present invention. Become.

[0013]

Example 1 As a core fiber, polyester fiber (single fiber fineness: 3 denier, cut length: 85 mm) 100
%, And slivers of 20 g / m were prepared, and 4 to 5 slivers were combined and subjected to a gil process to obtain a sliver of 9 ± 0.5 g / m. The sliver was set on a hoist for “center” processing. on the other hand,
As a coating material, a slit material having a width of 25 mm prepared by coating a 16 μm polyester film with an ethylene-vinyl acetate resin to a thickness of 12 μm was prepared and set on a hoist. The coating material film is pulled out from the latter hoisting machine with its adhesive-coated surface as the inner surface, and a sliver drawn from the former hoisting machine is introduced into the inner surface side so that the sliver is coated in a tubular shape, and the coating is performed. A guide is applied so that the adhesive-coated side of the material film is the upper surface of the non-coated side and is guided by a guide so that the overlapped surface is brought into contact with the heater, thereby forming a cylindrical core having a diameter of 7.5 mm.
This was cut into a length of 10 mm to obtain an ink holder. The processing speed was 30 m / min. The obtained ink holder has a high adhesive strength of the coating material,
It did not break during the handling process until the writing implement was completed.

Comparative Example 1: In Example 1, the coating material was 5
An ink holder was prepared under the same conditions except that a 0 μm polyester film was used. In this case, the adhesive strength of the coating material was weak, and some of the materials were broken in the handling process until the writing implement was completed.

Comparative Example 2 As a coating film, 8 μm was applied on the 16 μm polyester film used in Example 1.
I tried to glue this to a cylindrical shape using a laminated polypropylene film, but it did not adhere at all,
It did not become the core.

[0016]

According to the present invention, it is possible to provide a felt-tip pen entirely composed of "non-halogen-based" substances, to provide a pen with less environmental pollution at the time of disposal, and to manufacture the same as before. It can be manufactured at high speed and at low cost.

Claims (3)

[Claims] An ink holding member of a felt-tip pen covers a fiber constituting a core constituting the ink holding member, a core fiber connected to the core and constituting a writing portion, and at least covers the core fiber in a tubular shape. And a hot-melt adhesive applied to the coating material and adhesively fixing the coating materials together, all of which are composed of non-halogen compound components. 2. The coating material according to claim 1, having a thickness of 15 μm to 45 μm.
An ink holder for a felt-tip pen having a size of μm. 3. The hot-melt adhesive according to claim 1, wherein the hot-melt adhesive is polyester-based, polyurethane-based, polyamide-based, styrene-based.
Butadiene-based, styrene-isobutylene-based, ethylene-
An ink carrier for a felt-tip pen, which is any of vinyl acetate compounds.