Prepreg and diaphragm

JP7878945B2Active Publication Date: 2026-06-23ZACROS CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
ZACROS CORP
Filing Date
2022-06-17
Publication Date
2026-06-23

AI Technical Summary

Benefits of technology

【0012】 本発明によれば、接着剤を使用することなく、積層型の振動板を作製することが可能なプリプレグ製造用フィルム、プリプレグおよび当該プリプレグを用いた振動板を提供することができる。

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Abstract

To provide a film for prepreg manufacturing that allows the production of laminated diaphragm without using adhesive, and to provide a prepreg and a diaphragm.SOLUTION: Provided is a film for prepreg manufacturing characterized in that at least one of the films 21 and 21 for prepreg manufacturing used for prepreg 2 manufacturing contains polypropylene and antioxidant.SELECTED DRAWING: Figure 2
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Claims

1. A prepreg in which a first impregnation resin is laminated on one side of a carbon fiber and a second impregnation resin is laminated on the other side, The first impregnating resin contains unmodified polypropylene and an antioxidant. The prepreg is characterized in that the second impregnation resin contains acid-modified polypropylene.

2. The prepreg according to claim 1, characterized in that the first impregnation resin further contains at least one of an ultraviolet absorber and a light stabilizer.

3. The prepreg according to claim 1, wherein the antioxidant is a mixture comprising a phenolic antioxidant, a phosphite antioxidant, and a thioether antioxidant.

4. The prepreg according to claim 1, wherein the carbon fiber is a UD (unidirectional) material, a cross (woven) material, or an open fiber sheet.

5. A diaphragm having a prepreg according to any one of claims 1 to 4 laminated on at least one side of a foam, A diaphragm characterized in that the second impregnation resin in the prepreg is arranged on the foam side.

6. The prepreg is laminated on both sides of the foam in the thickness direction, The diaphragm according to claim 5, characterized in that the second impregnation resin in the prepreg on both sides is arranged on the foam side.

7. The diaphragm according to claim 5, characterized in that the first impregnation resin in the prepreg constitutes the outer surface of the diaphragm.

8. The diaphragm according to claim 5, characterized in that the foam and the prepreg are heat-sealed together with the second impregnation resin without the use of an adhesive.