JP2628454B2 - Manufacturing method of breathable insoles - Google Patents
Manufacturing method of breathable insolesInfo
- Publication number
- JP2628454B2 JP2628454B2 JP6067862A JP6786294A JP2628454B2 JP 2628454 B2 JP2628454 B2 JP 2628454B2 JP 6067862 A JP6067862 A JP 6067862A JP 6786294 A JP6786294 A JP 6786294A JP 2628454 B2 JP2628454 B2 JP 2628454B2
- Authority
- JP
- Japan
- Prior art keywords
- latex
- parts
- thermoplastic
- manufacturing
- heated
- 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.)
- Expired - Lifetime
Links
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【０００１】靴中敷はプラスチック、ゴム等の発泡製品
であるが、耐引裂性、耐摩耗性、弾性等において十分な
ものでなかった。特に着用者の足の形にフィットする形
状に成形しようとすれば工程が複雑化し、コスト高とな
る。さらに通気性を有することが重要であるが、これま
での技術ではこれは実現困難であった。The shoe insole is a foamed product such as plastic or rubber, but has insufficient tear resistance, abrasion resistance, elasticity and the like. In particular, if it is attempted to form a shape that fits the shape of the wearer's foot, the process becomes complicated and the cost increases. Further, it is important to have air permeability, but this has been difficult to achieve with conventional techniques.
【０００２】そこで本発明は、耐引裂性、耐摩耗性、弾
性、通気性等においてすぐれた靴用中敷をコスト効果的
に製造する方法を提供する。Accordingly, the present invention provides a method for cost-effectively producing a shoe insole having excellent tear resistance, abrasion resistance, elasticity, air permeability and the like.
【０００３】〔本発明の開示〕本発明は、熱可塑性プラ
スチック粉末を含んでいる加硫ラテックススポンジシー
トを該熱可塑性プラスチックの軟化点以上の温度へ加熱
し、冷却した金型内で所定形状に加圧成形すことを特徴
とする靴中敷の製造方法を提供する。DISCLOSURE OF THE INVENTION The present invention relates to a method of heating a vulcanized latex sponge sheet containing thermoplastic powder to a temperature higher than the softening point of the thermoplastic plastic and forming the same in a cooled mold. Provided is a method for producing a shoe insole, characterized by being subjected to pressure molding.
【０００４】熱可塑性プラスチックのフォームは熱的に
二次成形することができるが、一般に独立気泡型であ
り、通気性がない。さらにこれらは長時間圧縮荷重が加
わると塑性変形し、元の発泡状態へ弾性復帰しない。加
硫したラテックススポンジは通気性はあるが、熱的に二
次成形することができない。[0004] Thermoplastic foams can be thermally formed, but are generally of the closed cell type and are not breathable. In addition, these plastically deform when subjected to a compressive load for a long time, and do not elastically return to the original foamed state. Although the vulcanized latex sponge has air permeability, it cannot be thermally formed.
【０００５】本発明は、調合ラテックスへ熱可塑性プラ
スチックの粉末を加え、発泡、成形、加硫して得られる
シート状スポンジを熱的に二次成形することにより、通
気性を保持したまま、耐引裂性、耐摩耗性、弾性等にす
ぐれた靴中敷を製造することができる。According to the present invention, a sheet-like sponge obtained by adding a thermoplastic powder to a compounded latex, foaming, molding, and vulcanizing is thermally subjected to secondary molding, thereby maintaining air permeability while maintaining air permeability. A shoe insole excellent in tearability, wear resistance, elasticity and the like can be manufactured.
【０００６】ここで「調合ラテックス」とは、加硫剤
（イオウ）、加硫促進剤、促進助剤、老化防止剤、充填
剤などを含んだ天然および／または合成ゴムラテックス
をいう。[0006] Here, the "formulated latex" refers to a natural and / or synthetic rubber latex containing a vulcanizing agent (sulfur), a vulcanization accelerator, an accelerator, an antioxidant, a filler and the like.
【０００７】このため、調合ラテックスに所定量の熱可
塑性プラスチック粉末を均一に分散し、発泡剤を加え、
機械的に泡立てしてフォームをつくり、さらに塩化アン
モン等のゲル化剤を加えた後直ちに適当な基体上に所定
の厚みに流延塗布する。熱可塑性プラスチック粉末は、
好ましくは１５０℃以下で溶融もしくは軟化するもので
あり、例えばポリエチレン、ナイロン、エチレン酢酸ビ
ニル共重合体、およびそれらの混合物が用いられる。そ
の量は熱的に二次成形可能とする量でなければならない
が、あまり多く使用すると調合ラテックスの流動性がな
くなり、さらにラテックススポンジの特徴である通気
性、弾性等が低下する。添加量は一般に調合ラテックス
へ加えられる充填剤の量と同程度でよく、ラテックス中
の固形分１００重量部あたり、１〜２０部、特に２〜１
０部がよい。For this purpose, a predetermined amount of thermoplastic powder is uniformly dispersed in the compounded latex, and a foaming agent is added.
The foam is mechanically foamed to form a foam, and a gelling agent such as ammonium chloride is further added. Thermoplastic powder
Preferably, the resin melts or softens at a temperature of 150 ° C. or less, and for example, polyethylene, nylon, ethylene-vinyl acetate copolymer, and a mixture thereof are used. The amount must be such that it can be thermally formed into a secondary form. However, if it is used too much, the fluidity of the compounded latex will be lost, and the air permeability, elasticity, etc., characteristic of latex sponge, will be reduced. The addition amount may be generally the same as the amount of the filler added to the compounded latex, and 1 to 20 parts, especially 2 to 1 part, per 100 parts by weight of the solid content in the latex.
0 parts is good.
【０００８】基体は離型紙や離型ベルトを使用し、後で
剥離してもよいが、不織布、織布、ニット布等の上に直
接ラテックスフォーム層を形成することにより、基布と
一体の靴中敷を製造することができる。The substrate may be peeled off later using release paper or a release belt. However, by forming a latex foam layer directly on a nonwoven fabric, woven fabric, knitted fabric, or the like, the substrate can be integrated with the base fabric. Insoles can be manufactured.
【０００９】次にこのようにして形成したラテックスフ
ォーム層を熱風乾燥機中で８０〜９０℃で約１０〜２０
分間加熱し、ゲル化と同時に乾燥する。ついでこれを加
硫に適した温度および時間加熱して加硫ラテックススポ
ンジシートが得られる。Next, the latex foam layer thus formed is heated in a hot air drier at 80 to 90 ° C. for about 10 to 20 hours.
Heat for minutes and dry simultaneously with gelation. Then, this is heated at a temperature and for a time suitable for vulcanization to obtain a vulcanized latex sponge sheet.
【００１０】このようにして製造したスポンジシートは
熱的に二次成形することが可能である。このためシート
を一旦熱可塑性プラスチックの軟化温度以上、例えば１
５０℃へ加熱し、次に中敷の形状を有する金型内で圧縮
成形する。この際金型は冷却状態になければならない。
このため金型は水道水または冷却水を循環させることに
よって常時冷却することが好ましい。このプレス作業は
短時間、例えば３０秒以内に終了するので効率的であ
り、連続したシートを使用して連続成形も可能になる。
さらに全体として通気性を保持しながら、部分的に圧縮
の程度を大きくし、必要部分の硬度を高くすることもで
きる。また中敷の片側または両側に布等のシート材料を
ライニングした製品を得ようとする場合、接着剤を使用
せずに一体化され、接着強度を接着剤を使用した場合よ
りもすぐれている。[0010] The sponge sheet produced in this way can be subjected to thermal secondary molding. For this reason, the sheet is temporarily heated above the softening temperature of the thermoplastic,
Heat to 50 ° C. and then compression mold in a mold with insole shape. At this time, the mold must be in a cooled state.
For this reason, it is preferable that the mold is always cooled by circulating tap water or cooling water. Since this pressing operation is completed in a short time, for example, within 30 seconds, it is efficient, and continuous molding can be performed using a continuous sheet.
Further, the degree of compression can be partially increased while maintaining the air permeability as a whole, and the hardness of the necessary portion can be increased. Also, when trying to obtain a product in which a sheet material such as a cloth is lined on one or both sides of the insole, the product is integrated without using an adhesive, and the adhesive strength is superior to that when an adhesive is used.
【００１１】〔実施例〕下記配合によって調合ラテック
スをつくった。 ＮＲラテックス ７００重量部 合成ラテックス ３００重量部 起泡剤 ５０重量部 加硫促進剤 ３重量部 イオウ ２重量部 亜鉛華 ５重量部 老化防止剤 ２重量部 熱可塑性プラスチック粉末 ５０重量部Example A compounded latex was prepared according to the following formulation. NR latex 700 parts by weight Synthetic latex 300 parts by weight Foaming agent 50 parts by weight Vulcanization accelerator 3 parts by weight Sulfur 2 parts by weight Zinc white 5 parts by weight Antioxidant 2 parts by weight Thermoplastic powder 50 parts by weight
【００１２】上記調合ラテックスを所要量秤量し、約４
倍の体積に発泡させ、ゲル化剤として適量の塩化アンモ
ンを混合した後、不織布上に所要の厚みに流延し、熱風
乾燥機中で８０〜９０℃の温度で約１０〜２０分間加熱
し、ゲル化乾燥した。さらにこのシートを熱風乾燥機中
で１２０℃で１０分間加熱加硫し、加硫スポンジシート
を得た。このシートを１５０℃で５分間加熱し、直ちに
５℃に冷却した金型で３０秒プレスし、靴内敷に成形し
た。得られた製品は、通気性を保持し、耐引裂性、耐摩
耗性、弾性においてすぐれていた。[0012] The above prepared latex is weighed in a required amount, and
After foaming to twice the volume and mixing an appropriate amount of ammonium chloride as a gelling agent, it is cast on a non-woven fabric to a required thickness and heated in a hot air dryer at a temperature of 80 to 90 ° C. for about 10 to 20 minutes. Gelled and dried. Further, this sheet was heated and vulcanized at 120 ° C. for 10 minutes in a hot air drier to obtain a vulcanized sponge sheet. This sheet was heated at 150 ° C. for 5 minutes, immediately pressed in a mold cooled to 5 ° C. for 30 seconds, and formed into shoe insoles. The resulting product retained breathability and was excellent in tear resistance, abrasion resistance and elasticity.
Claims (4)
加硫ラテックススポンジシートを該熱可塑性プラスチッ
クの軟化点以上の温度へ加熱し、冷却した金型内で所定
形状にプレス成形することを特徴とする通気性靴中敷の
製造方法。1. A vulcanized latex sponge sheet containing thermoplastic powder is heated to a temperature not lower than the softening point of the thermoplastic and press-molded into a predetermined shape in a cooled mold. Method of manufacturing a breathable insole.
成されている請求項１の通気性靴中敷の製造方法。2. The method according to claim 1, wherein the latex sponge sheet is formed on a base cloth.
エチレン酢酸ビニル共重合体、ナイロンまたはそれらの
混合物である請求項１または２の通気性靴中敷の製造方
法。3. The thermoplastic resin is polyethylene,
3. The method for producing a breathable insole according to claim 1, which is an ethylene-vinyl acetate copolymer, nylon or a mixture thereof.
比でラテックス１００部あたり１ないし２０部添加され
る請求項１ないし３のいずれかの通気性靴中敷の製造方
法。4. The method according to claim 1, wherein the thermoplastic powder is added in an amount of 1 to 20 parts by weight per 100 parts of latex in terms of solid content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6067862A JP2628454B2 (en) | 1994-03-11 | 1994-03-11 | Manufacturing method of breathable insoles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6067862A JP2628454B2 (en) | 1994-03-11 | 1994-03-11 | Manufacturing method of breathable insoles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07246669A JPH07246669A (en) | 1995-09-26 |
| JP2628454B2 true JP2628454B2 (en) | 1997-07-09 |
Family
ID=13357174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6067862A Expired - Lifetime JP2628454B2 (en) | 1994-03-11 | 1994-03-11 | Manufacturing method of breathable insoles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2628454B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3802035A1 (en) * | 1988-01-25 | 1989-08-10 | Reichenecker Hans Storopack | DAMPING OR UPHOLSTERY BODY FOR USE IN SHOES |
| JP2799801B2 (en) * | 1992-04-28 | 1998-09-21 | 株式会社小崎 | Method for manufacturing shoe cushion member |
-
1994
- 1994-03-11 JP JP6067862A patent/JP2628454B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07246669A (en) | 1995-09-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970204 |