JPH0263898A - Core for writing utensil - Google Patents
Core for writing utensilInfo
- Publication number
- JPH0263898A JPH0263898A JP63218093A JP21809388A JPH0263898A JP H0263898 A JPH0263898 A JP H0263898A JP 63218093 A JP63218093 A JP 63218093A JP 21809388 A JP21809388 A JP 21809388A JP H0263898 A JPH0263898 A JP H0263898A
- Authority
- JP
- Japan
- Prior art keywords
- polyethylene
- core
- molded product
- pipe
- hard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- -1 polyethylene Polymers 0.000 claims abstract description 32
- 239000004698 Polyethylene Substances 0.000 claims abstract description 29
- 229920000573 polyethylene Polymers 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 229920003355 Novatec® Polymers 0.000 abstract 1
- RLAWWYSOJDYHDC-BZSNNMDCSA-N lisinopril Chemical compound C([C@H](N[C@@H](CCCCN)C(=O)N1[C@@H](CCC1)C(O)=O)C(O)=O)CC1=CC=CC=C1 RLAWWYSOJDYHDC-BZSNNMDCSA-N 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Pens And Brushes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は折り曲げに対して強度の高い筆記具用中芯に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a core for a writing instrument that has high strength against bending.
（従来の技術とその課題）
従来、筆記具用中芯、例えば油性ボールペンの中芯に用
いるパイプ状成形品の材質として、ポリプロピレンが用
いられている。(Prior Art and its Problems) Conventionally, polypropylene has been used as a material for a pipe-shaped molded product used for the core of a writing instrument, for example, the core of an oil-based ballpoint pen.
この油性ボールペンの中芯は、硬質の外装軸に挿入し、
用いられるものであるが、カートリッジとして外装軸に
挿入しない状態で保存したり、外装軸がデザインあるい
は使用上折り曲げられる構造であると、中芯に外よりの
力が加えられ、折り曲げられる状態になり、従来の中芯
を用いると、特に、低温時において、折り曲げた際に、
中芯のパイプ状成形品座屈や割れが生じ、インキが漏れ
る等の問題がある。The core of this oil-based ballpoint pen is inserted into the hard exterior shaft,
However, if it is stored as a cartridge without being inserted into the outer shaft, or if the outer shaft is designed to be bent due to design or use, external force is applied to the core, causing it to bend. , when using a conventional core, when bent, especially at low temperatures,
There are problems such as buckling and cracking of the core pipe-shaped molded product, and ink leakage.
（課題を解決するための手段）
本発明は、上記問題点に鑑みなされたものであり、即ち
、その要旨を、筆記部と、インキを収容したパイプ状成
形品よりなる筆記具用中芯であって、上記パイプ状成形
品の材質が軟質ポリエチレンと硬質ポリエチレンとの混
合物よりなり、軟質ポリエチレンを１０重量％以上含む
ことを特徴とする筆記具用中芯とするものである。(Means for Solving the Problems) The present invention has been made in view of the above-mentioned problems, and the gist thereof is to provide a core for a writing instrument comprising a writing part and a pipe-shaped molded product containing ink. The core for a writing instrument is characterized in that the pipe-shaped molded product is made of a mixture of soft polyethylene and hard polyethylene, and contains 10% by weight or more of soft polyethylene.
以下、本発明を更に、詳細に説明する。Hereinafter, the present invention will be explained in further detail.
パイプ状成形品としては、軟質ポリエチレンと硬質ポリ
エチレンとの混合物を使用するが、軟質ポリエチレンと
して、具体的には、サンチックＭ２Ｏ０４（旭化成工業
ＩＩ＄ｌ製）、ウルトゼックス（三井石油化学工業ｆ４
１製） 、パトロセン（東洋曹達■製）、ハイミラン（
三井ポリケミカル■製）等が挙げられ、その使用量が１
０重量％以上であるのは、１０重量％より少ないと、効
果が得られないためである。As the pipe-shaped molded product, a mixture of soft polyethylene and hard polyethylene is used. Specifically, examples of the soft polyethylene include Santic M2O04 (manufactured by Asahi Kasei II $l), Ultzex (Mitsui Petrochemicals F4)
1), Patrosen (manufactured by Toyo Soda), Himiran (manufactured by Toyo Soda),
manufactured by Mitsui Polychemical Co., Ltd.), etc., and the amount used is 1
The reason why it is 0% by weight or more is because if it is less than 10% by weight, no effect will be obtained.
又、硬質ポリエチレンとして、具体的には、サンチック
Ｂａ２Ｏ（Ｍ化成工業■製）、チッソポリエチ（チッ
ソ■製）、ツバチック（三菱化成工業■製）、ニボロン
ハード（東洋曹達■製）等が挙げられ、その使用量は、
軟質ポリエチレンの使用量が１０重量％以上であるため
、９０重重量以下となるが、それは、９０重量％より多
いと、低温時、折り曲げると、座屈又は割れが発生し効
果が得られないためである。Specific examples of hard polyethylene include Santic Ba2O (manufactured by M Kasei Kogyo ■), Chisso Polyethylene (manufactured by Chisso ■), Tubatic (manufactured by Mitsubishi Chemical Industries ■), Niboron Hard (manufactured by Toyo Soda ■), etc. Its usage is
Since the amount of soft polyethylene used is 10% by weight or more, the weight is 90% by weight or less, but this is because if it is more than 90% by weight, buckling or cracking will occur when bending at low temperatures, making it ineffective. It is.
（作 用）
ポリエチレンはポリプロピレンに比べ、胞化温度が低い
ため、低温時、折り曲げても、割れにくい。(Function) Polyethylene has a lower celling temperature than polypropylene, so it is less likely to break even when bent at low temperatures.
（実施例）
去ｍ
軟質ポリエチレン １０重量部硬質ポリ
エチレン ９ｏ重ｉ部上記各成分を混合
し、押し出し成形によりパイプ状成形品を得た。(Example) 10 parts by weight of soft polyethylene 9 parts by weight of hard polyethylene The above components were mixed and a pipe-shaped molded product was obtained by extrusion molding.
叉胤舅Ｉ
軟質ポリエチレン ５０重量部硬質ポリ
エチレン ５０重量部上記各成分を混合
し、押し出し成形によりパイプ状成形品を得た。叉胤舅I 50 parts by weight of soft polyethylene 50 parts by weight of hard polyethylene The above components were mixed and a pipe-shaped molded product was obtained by extrusion molding.
失庭１
軟質ポリエチレン ２５重量部硬質ポリ
エチレン ７５重量部上記各成分を混合
し、押し・出し成形によりパイプ状成形品を得た。Loss of garden 1 25 parts by weight of soft polyethylene 75 parts by weight of hard polyethylene The above components were mixed and a pipe-shaped molded product was obtained by extrusion molding.
ル絞銖よ
ポリプロピレンのみを使用し、これを押し出し成形によ
りパイプ状成形品を得た。Using only polypropylene, a pipe-shaped molded product was obtained by extrusion molding.
匝較件又
硬質ポリエチレンのみを使用し、これを押し出し成形に
よりパイプ状成形品を得た。A pipe-shaped molded product was obtained by extrusion molding using only hard polyethylene.
ル敗１
軟質ポリエチレンのみを使用し、これを押し出し成形に
よりパイプ状成形品を得た。1. Only soft polyethylene was used and a pipe-shaped molded product was obtained by extrusion molding.
（効 果）
実施例１〜３、比較例１〜３により得られたパイプ状成
形品について、耐屈曲性試験を行なった結果な下表に示
す。(Effects) The pipe-shaped molded products obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were subjected to a bending resistance test, and the results are shown in the table below.
表
×・・・・・・割れが発生する
このように、本発明によると、折り曲げに対して強度の
高い筆記具用中芯が得られるものである。Table: ×...Cracks occur.According to the present invention, a core for a writing instrument with high strength against bending can be obtained.
特許出顕人 ぺんてる株式会社
耐屈曲性・・・・・・０℃、−１０℃、−２０’Ｃ中で
、表に示す角度に成形品を曲げ、状態を
目視判定。Patent published by Pentel Co., Ltd.Bending resistance: The molded product was bent at the angle shown in the table at 0°C, -10°C, and -20'C, and the condition was visually judged.
○・・・・・・異常なし Δ・・・・・・座屈が発生する○・・・No abnormalities Δ・・・Buckling occurs
Claims (1)
記具用中芯であって、上記パイプ状成形品の材質が軟質
ポリエチレンと硬質ポリエチレンとの混合物よりなり、
軟質ポリエチレンを１０重量％以上含むことを特徴とす
る筆記具用中芯。A writing instrument core comprising a writing part and a pipe-shaped molded product containing ink, the pipe-shaped molded product being made of a mixture of soft polyethylene and hard polyethylene,
A core for a writing instrument characterized by containing 10% by weight or more of soft polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63218093A JP2627077B2 (en) | 1988-08-31 | 1988-08-31 | Core for writing instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63218093A JP2627077B2 (en) | 1988-08-31 | 1988-08-31 | Core for writing instruments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0263898A true JPH0263898A (en) | 1990-03-05 |
| JP2627077B2 JP2627077B2 (en) | 1997-07-02 |
Family
ID=16714520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63218093A Expired - Lifetime JP2627077B2 (en) | 1988-08-31 | 1988-08-31 | Core for writing instruments |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2627077B2 (en) |
-
1988
- 1988-08-31 JP JP63218093A patent/JP2627077B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2627077B2 (en) | 1997-07-02 |
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