JPH10331097A - Rust-preventing paper - Google Patents

Rust-preventing paper

Info

Publication number
JPH10331097A
JPH10331097A JP14005897A JP14005897A JPH10331097A JP H10331097 A JPH10331097 A JP H10331097A JP 14005897 A JP14005897 A JP 14005897A JP 14005897 A JP14005897 A JP 14005897A JP H10331097 A JPH10331097 A JP H10331097A
Authority
JP
Japan
Prior art keywords
rust
paper
organic acid
preventing
sodium
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.)
Pending
Application number
JP14005897A
Other languages
Japanese (ja)
Inventor
Seiji Makino
誠司 牧野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP14005897A priority Critical patent/JPH10331097A/en
Publication of JPH10331097A publication Critical patent/JPH10331097A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paper (AREA)
  • Lead Frames For Integrated Circuits (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain rust-preventing paper improved in a rust-preventing performance by impregnating a paper substrate small in the content of chloride ions with a rust-preventing liquid containing an organic acid sodium salt in addition to a rust-preventing agent. SOLUTION: This rust-preventing paper is obtained by impregnating a paper substrate having a Beck smoothness of <=10 sec, a tensile strength of >=7.0 kgf/15 mm in the longitudinal direction, and small in the content of chloride ions with a rust-preventing agent such as urea or an organic acid amine salt. Therein, 0.2-1.0 wt.% of an organic acid sodium salt such as sodium citrate, sodium succinate or sodium tartrate is added to the impregnating solution containing the rust-preventing agent to contain 0.1-2.0 wt.% of the organic acid sodium salt in the impregnated paper.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、リードフレーム等
の金属枚葉体に用いられる防錆紙に関するもので、特に
リードフレーム用材に鉄−ニッケル合金の42材を用い
たリードフレーム用防錆紙に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rust-prevention paper used for a metal sheet such as a lead frame, and more particularly to a rust-prevention paper for a lead frame using 42 iron-nickel alloy material for the lead frame. About.

【0002】[0002]

【従来の技術】リードフレームの保管、輸送中の錆止め
は、一般に、防錆紙とリードフレームを交互に重ね、各
防錆紙間に各リードフレームが挟まれている状態にして
おく。このように保たれていても、保管、輸送中の条件
によっては42材(ニッケル42重量%、残部鉄)表面
の酸化などによる変色、錆発生をすることがある。すな
わち、防錆紙の防錆性能は十分なものではない。また、
防錆紙の表面が粗面であると、ピン先端が表面に引っ掛
かりピンの配列に乱れや曲がりを生じることがある。
2. Description of the Related Art In general, rust prevention during storage and transportation of a lead frame is performed by alternately stacking rust-preventive papers and lead frames so that each lead frame is sandwiched between the rust-preventive papers. Even if kept in this way, discoloration and rust may occur due to oxidation of the surface of the 42 material (42% by weight of nickel, balance iron) depending on the conditions during storage and transportation. That is, the rustproofing performance of the rustproof paper is not sufficient. Also,
If the surface of the rust-preventive paper is rough, the tip of the pin may be caught on the surface and the arrangement of the pins may be disturbed or bent.

【0003】[0003]

【発明が解決しようとする課題】本発明は、上記のよう
な保管、輸送中の酸化などによる変色、錆発生が起こら
ないよう、防錆性能を向上させた防錆紙を提供するもの
である。また、ピン先端の紙の表面への引っ掛かりによ
るピンの配列に乱れや曲がりの発生を減少させる防錆紙
を提供するものである。
SUMMARY OF THE INVENTION The present invention is to provide a rust-proof paper having improved rust-preventing performance so that discoloration and rust due to oxidation during storage and transportation as described above do not occur. . Another object of the present invention is to provide a rust-proof paper that reduces the occurrence of disorder and bending in the pin arrangement due to the pin tip caught on the paper surface.

【0004】[0004]

【課題を解決するための手段】本発明の第一の発明は、
紙に防錆剤を含浸させた防錆紙において、塩素イオン量
の少ない紙を用い、少なくも有機酸ナトリウムを含有し
ていることを特徴とする防錆紙である。
Means for Solving the Problems The first invention of the present invention is:
A rust-preventing paper obtained by impregnating a paper with a rust-preventive agent, wherein the paper contains a small amount of chloride ions and contains at least sodium organic acid.

【0005】また、本発明の第二の発明は、上記第一の
発明の防錆紙において、前記有機酸ナトリウムの含有量
が0.1〜2.0重量%である防錆紙である。
[0005] A second invention of the present invention is the rust-proofing paper according to the first invention, wherein the content of the organic acid sodium is 0.1 to 2.0% by weight.

【0006】また、本発明は、上記第一の発明又は第二
の発明の防錆紙において、紙の平滑度が10秒(ベック
平滑度)以下(平滑性が良いこと)で、縦方向の引張強
さが7.0kgf/15mm以上である防錆紙である。
Further, the present invention relates to the rust-preventive paper according to the first or second invention, wherein the paper has a smoothness of 10 seconds (Beck smoothness) or less (smoothness is good), and It is a rust-proof paper having a tensile strength of 7.0 kgf / 15 mm or more.

【0007】[0007]

【発明の実施の形態】本発明を一実施形態に基づいて以
下に説明する。図1は、本発明による防錆紙が使用され
る状態の一実施例を説明する側面図である。図1の側面
図に示すように、防錆紙(2)が使用される際は、2枚
以上のリードフレーム(3)が直接に接触して重なるこ
とがないように、1枚のリードフレーム(3)と1枚の
防錆紙(2)とを交互に重ね合わせる状態で、防錆紙は
使用されるものである。図2は、その状態の平面図であ
り、図2に示すようにリードフレーム(3)に対し防錆
紙(2)は面積の大きなものになっている。図3は、リ
ードフレーム(3)が、6ピース連なる状態で保管、輸
送される一例を示している。図4は、1ピース(4)分
のリードフレーム(3)の平面図である。5はピン先端
である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on one embodiment. FIG. 1 is a side view illustrating an embodiment of a state in which the rust-proof paper according to the present invention is used. As shown in the side view of FIG. 1, when rust-proof paper (2) is used, one lead frame (3) is used so that two or more lead frames (3) do not directly contact and overlap. The rust-proof paper is used in a state where (3) and one sheet of rust-proof paper (2) are alternately overlapped. FIG. 2 is a plan view of this state. As shown in FIG. 2, the rust-proof paper (2) has a larger area than the lead frame (3). FIG. 3 shows an example in which the lead frame (3) is stored and transported in a state of being connected to six pieces. FIG. 4 is a plan view of a lead frame (3) for one piece (4). 5 is a pin tip.

【0008】金属の錆の発生は、塩素イオン量が多いほ
ど発生しやすく、本発明においては、防錆剤を含浸させ
る紙として紙中の塩素イオン量の少ない紙を用いるもの
である。紙中の塩素イオン量の少ない紙としては、例え
ば、日本化工紙(株)製、商品名両更未晒金属合紙、坪
量50g/m2 、品番I−5などがあげられる。
[0008] The generation of metal rust is more likely to occur as the amount of chloride ions increases, and in the present invention, paper having a small amount of chlorine ions in the paper is used as the paper impregnated with the rust inhibitor. Examples of the paper having a small amount of chlorine ions in the paper include, for example, unbleached metal interleaf paper (trade name, manufactured by Nippon Kako Paper Co., Ltd.), basis weight 50 g / m 2 , and product number I-5.

【0009】また、金属が酸素、水、塩分などと反応し
て発生する錆は、酸性の度合いが強いほど発生しやす
く、本発明においては、酸性の度合いを弱くして、錆の
発生を抑制するために、有機酸ナトリウムを用いるもの
である。
Rust generated by the reaction of metal with oxygen, water, salt and the like is more likely to occur as the degree of acidity increases. In this case, sodium organic acid is used.

【0010】有機酸ナトリウムとしては特に限定されな
いが、クエン酸ナトリウム、コハク酸ナトリウム、酒石
酸ナトリウムなどがあげられる。例えば、亞硝酸ナトリ
ウム、尿素、有機酸アミン塩などの防錆剤からなる防錆
浸漬液[重量成分比1:1:2]においては、有機酸ナ
トリウムをこの防錆浸漬液に対し0.2〜1.0重量%
含有させることが好ましい。これによって、紙に含浸さ
せた際に、その紙中の有機酸ナトリウムの含有量を0.
1〜2.0重量%とすることができる。
The organic acid sodium salt is not particularly restricted but includes sodium citrate, sodium succinate, sodium tartrate and the like. For example, in a rust preventive immersion liquid [weight component ratio 1: 1: 2] composed of a rust preventive such as sodium nitrite, urea, and an organic acid amine salt, the organic acid sodium is added to the rust preventive immersion liquid by 0.2%. ~ 1.0% by weight
It is preferable to include them. Thereby, when the paper is impregnated, the content of the organic acid sodium in the paper is reduced to 0.1%.
It can be 1 to 2.0% by weight.

【0011】また、防錆紙の表面の平滑度が不十分であ
ったり、破れ易い紙であったりすると、ピン先端(5)
がひっかかってしまうことがあるためリードフレームの
ピン先端(5)の配列に乱れや曲がりが発生しやすい。
If the surface of the rust-preventive paper has insufficient smoothness or is easily broken, the pin tip (5)
May be disturbed or bent in the arrangement of the pin ends (5) of the lead frame.

【0012】そこで、本発明は、リードフレームのピン
先端(5)の配列に乱れや曲がりが発生するのを防ぐた
め、紙の表裏の平滑度が約10秒(ベック平滑度)以下
(平滑性が良いこと)の紙を用いるものである。また、
破れ難い紙として、紙の縦方向の引張強さが約7.0k
gf/15mm以上である紙を用いるものである。
In order to prevent the arrangement of the pin ends (5) of the lead frame from being disturbed or bent, the present invention provides a smoothness of the front and back of the paper of about 10 seconds or less (Beck smoothness) or less. Is good). Also,
As a paper that is difficult to tear, the longitudinal tensile strength of the paper is about 7.0k
gf / 15 mm or more paper is used.

【0013】表1は、本発明において用いる紙の塩素イ
オン量、平滑度、引張強さ、有機酸ナトリウム含有量及
び防錆剤の組成を実施例として示したものである。ま
た、比較例として従来の防錆紙における上記塩素イオン
量、平滑度、引張強さ、有機酸ナトリウム含有量及び防
錆剤の組成を示したものである。
Table 1 shows the chlorine ion content, the smoothness, the tensile strength, the content of the organic acid sodium and the composition of the rust inhibitor of the paper used in the present invention as examples. Also, as comparative examples, the above-mentioned amount of chloride ions, smoothness, tensile strength, sodium organic acid content and composition of the rust preventive in the conventional rust preventive paper are shown.

【0014】[0014]

【表1】 [Table 1]

【0015】表2は、本発明における防錆紙を用いた際
の、42材の表裏における錆の発生状態の試験結果を上
記実施例と比較例とを対比して示したものである。本発
明においては、試験条件40℃、90%、480h(放
置雰囲気)において、上記実施例は錆の発生が殆どなく
「異常なし」であるのに対し、上記比較例は錆が発生し
「変色あり」であり、比較例と比べ実施例の防錆性能が
優れているものである。
Table 2 shows the test results of the state of rust generation on the front and back of 42 materials when the rust-preventing paper of the present invention was used, comparing the above Examples and Comparative Examples. In the present invention, under the test conditions of 40 ° C., 90%, and 480 hours (atmosphere left), the above example shows almost no rust and “no abnormality”, whereas the comparative example shows rust and “discoloration”. "Yes", indicating that the rust-preventing performance of the example is superior to that of the comparative example.

【0016】[0016]

【表2】 [Table 2]

【0017】[0017]

【発明の効果】本発明は、防錆紙の紙中の塩素イオン量
を低く抑えたので、塩素の影響による錆の発生が抑制さ
れて防錆性能が向上する。また、有機酸ナトリウムを含
有させることによって、酸性の度合いを抑えたので、防
錆性能が向上する。また、紙の平滑度を適性値に設定し
たので、ピン先端の配列に乱れや曲がりの発生が減少す
る。
According to the present invention, since the amount of chlorine ions in the rust-preventive paper is suppressed to a low level, the generation of rust due to the influence of chlorine is suppressed, and the rust-preventive performance is improved. In addition, since the organic acid sodium is contained, the degree of acidity is suppressed, so that rust prevention performance is improved. Further, since the smoothness of the paper is set to an appropriate value, the occurrence of disorder and bending in the pin tip arrangement is reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明による防錆紙が使用される状態の一実施
例を説明する側面図である。
FIG. 1 is a side view illustrating an embodiment in which a rust-proof paper according to the present invention is used.

【図2】本発明による防錆紙が使用される状態の一実施
例を説明する平面図である。
FIG. 2 is a plan view illustrating one embodiment of a state in which the rust-proof paper according to the present invention is used.

【図3】リードフレームが6ピースで構成されている一
般的なリードフレームの状態を説明する図である。
FIG. 3 is a view for explaining a state of a general lead frame in which a lead frame is composed of six pieces.

【図4】1ピース分のリードフレームの平面図である。FIG. 4 is a plan view of a lead frame for one piece.

【符号の説明】[Explanation of symbols]

2…防錆紙 3…リードフレーム 4…1ピース分のリードフレーム 5…ピン先端 2: Rustproof paper 3: Lead frame 4: Lead frame for one piece 5: Pin tip

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】紙に防錆剤を含浸させた防錆紙において、
塩素イオン量の少ない紙を用い、少なくも有機酸ナトリ
ウムを含有していることを特徴とする防錆紙。
1. A rust-proof paper obtained by impregnating a paper with a rust-preventive agent,
Rust prevention paper characterized by using paper with a small amount of chloride ions and containing at least sodium organic acid.
【請求項2】前記有機酸ナトリウムの含有量が0.1〜
2.0重量%である請求項1記載の防錆紙。
2. The method according to claim 1, wherein the content of said organic acid sodium is 0.1 to 0.1%.
The rust-proofing paper according to claim 1, which is 2.0% by weight.
【請求項3】紙の平滑度が10秒(ベック平滑度)以下
で、縦方向の引張強さが7.0kgf/15mm以上で
ある請求項1又は請求項2記載の防錆紙。
3. The rust-proof paper according to claim 1, wherein the paper has a smoothness of 10 seconds or less (Beck smoothness) or less and a tensile strength in a longitudinal direction of 7.0 kgf / 15 mm or more.
JP14005897A 1997-05-29 1997-05-29 Rust-preventing paper Pending JPH10331097A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14005897A JPH10331097A (en) 1997-05-29 1997-05-29 Rust-preventing paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14005897A JPH10331097A (en) 1997-05-29 1997-05-29 Rust-preventing paper

Publications (1)

Publication Number Publication Date
JPH10331097A true JPH10331097A (en) 1998-12-15

Family

ID=15260018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14005897A Pending JPH10331097A (en) 1997-05-29 1997-05-29 Rust-preventing paper

Country Status (1)

Country Link
JP (1) JPH10331097A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10042968B4 (en) 1999-09-03 2018-07-12 Dtr Vms Limited Regulation of vibrations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10042968B4 (en) 1999-09-03 2018-07-12 Dtr Vms Limited Regulation of vibrations

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