IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0220426
(2002-09-03)
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우선권정보 |
JP-0063357 (2000-03-03); JP-0081836 (2000-03-17); JP-0081837 (2000-03-17) |
국제출원번호 |
PCT/JP01/01632
(2001-03-02)
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국제공개번호 |
WO01/64411
(2001-09-07)
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발명자
/ 주소 |
- Saitou, Takeshi
- Hanawa, Akinori
- Matsuzaki, Takashi
- Sudou, Morimichi
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출원인 / 주소 |
- Hitachi Chemical Co., Ltd.
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대리인 / 주소 |
Antonelli, Terry, Stout & Kraus, LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
1 |
초록
▼
There are disclosed a method of preparing a prepreg comprising the steps of a impregnation process in which a thermosetting resin varnish is impregnated into a fiber base material and a drying step in which a solvent of the impregnated thermosetting resin varnish in the fiber base material is vapori
There are disclosed a method of preparing a prepreg comprising the steps of a impregnation process in which a thermosetting resin varnish is impregnated into a fiber base material and a drying step in which a solvent of the impregnated thermosetting resin varnish in the fiber base material is vaporized and the resin is semi-cured, wherein the drying step is carried out by moving the fiber base material into which the thermosetting resin varnish is impregnated with a tensile force of 3.0 N/cm or less; and a prepreg prepared by the method.
대표청구항
▼
1. A method of preparing a prepreg comprising: an impregnation step in which a thermosetting resin varnish is impregnated into a glass fiber base material, and a drying step in which a solvent of the impregnated thermosetting resin varnish in the glass fiber base material is vaporized and the r
1. A method of preparing a prepreg comprising: an impregnation step in which a thermosetting resin varnish is impregnated into a glass fiber base material, and a drying step in which a solvent of the impregnated thermosetting resin varnish in the glass fiber base material is vaporized and the resin is semi-cured, wherein said drying step is carried out by moving the glass fiber base material, into which the thermosetting resin varnish is impregnated, in a horizontal direction, with a tensile force of 3.0 N/cm or less. 2. A method of preparing a prepreg comprising: an impregnation step in which a thermosetting resin varnish is impregnated into a glass fiber base materials, and a drying step in which a solvent of the impregnated thermosetting resin varnish in the glass fiber base material is vaporized and the resin is semi-cured, wherein the drying step is carried out by using a horizontal drying oven with a temperature at an inlet portion of the drying oven lower than a softening point of the resin, and moving the glass fiber base material with a tensile force of 3.0 N/cm or less. 3. A method of preparing a prepreg comprising: an impregnation step in which a thermosetting resin varnish is impregnated into a glass fiber base materials, and a drying step in which a solvent of the impregnated thermosetting resin varnish in the glass fiber base material is vaporized and the resin is semi-cured, wherein the drying step is carried out by moving the glass fiber base material into which the thermosetting resin varnish is impregnated in a horizontal direction, and-by heating the glass fiber base material firstly at a temperature lower than a softening point of the resin, and moving the glass fiber base material with a tensile force of 3.0 N/cm or less. 4. A method of preparing a prepreg comprising: an impregnation step in which a thermosetting resin varnish is impregnated into a glass fiber base material, and a drying step in which a solvent of the impregnated thermosetting resin varnish in the glass fiber base material is vaporized and the resin is semi-cured, wherein the drying step is carried out by using a horizontal drying oven having gas injection nozzles in the drying oven provided at top and bottom alternately, and moving the glass fiber base material with a tensile force of 3.0 N/cm or less. 5. A method of preparing a prepreg comprising: an impregnation step in which a thermosetting resin varnish is impregnated into a glass fiber base material, and a drying step in which a solvent of the impregnated thermosetting resin varnish in the glass fiber base material is vaporized and the resin is semi-cured, wherein the drying step is carried out by moving the glass fiber base material into which the thermosetting resin varnish is impregnated in a horizontal direction and moving the glass fiber base material with a tensile force of 3.0 N/cm or less, and the glass fiber base material is supported by blowing a gas from top and bottom alternately to the glass fiber base material and stabilized. 6. The method of preparing a prepreg according to claim 2, wherein the glass fiber base material into which the thermosetting resin varnish is impregnated is passed through the drying oven in the drying step.7. The method of preparing a prepreg according to claim 4, wherein the glass fiber base material in which the thermosetting resin varnish is impregnated is passed through the drying oven in the drying step.8. The method of preparing a prepreg according to claim 1, wherein the glass fiber base material is a belt-shaped material.9. The method of preparing a prepreg according to claim 1, wherein a difference between a prepreg dimension y (mm) and a glass fiber base material width dimension x (mm) as a starting material satisfies the equation (1):0.3(%)≧( x−y)/x×100 (1).10. The method of preparing a prepreg according to claim 1, wherein the glass fiber base material is a glass woven fabric or a gla ss non-woven fabric.11. The method of preparing a prepreg according to claim 1, wherein the glass fiber base material comprises a woven fabric, and a relationship between a gas permeability q (cc/cm2/sec) and a thickness z (&mgr;m) satisfies the equation (4):q≦− 0.1z+25 (4).12. The method of preparing a prepreg according to claim 1, wherein the glass fiber base material comprises a non-woven fabric and its weight weighing is 30 to 100 g/m2.13. The method of preparing a prepreg according to claim 1, wherein said tensile force is 2.5 N/cm or less.14. The method of preparing a prepreg according to claim 1, wherein in the drying step the thermosetting resin is cured to a B-stage state.15. The method of preparing a prepreg according to claim 4, wherein a gas velocity of the gas blown to the top of the glass fiber base material is 60 to 80% of the gas velocity of the gas blown to the bottom of the glass fiber base material.16. The method of preparing a prepreg according to claim 2, wherein a temperature during the drying step is in a range from a softening temperature of the resin, up to 200° C.17. A method of preparing a prepreg comprising: an impregnation step in which a thermosetting resin varnish is impregnated into a glass fiber base material, and a drying step in which a solvent of the impregnated thermosetting resin varnish in the glass fiber base material is vaporized and the resin is semi-cured, wherein said drying step is carried out by moving the glass fiber base material, into which the thermosetting resin varnish is impregnated, in a horizontal direction, with a tensile force of 3.0 N/cm or less, wherein in the drying step the glass fiber base material is supported by injected gas, the injected gas having a gas injecting force B, and wherein a tensile force A to move the glass fiber base material, the gas injecting force B to support the base material and a combined force thereof F have the relationship that an angle &thgr; formed by the tensile force A and the combined force F is 18 to 60°. 18. The method of preparing a prepreg according to claim 17, wherein the glass fiber base material is a belt-shaped material.19. The method of preparing a prepreg according to claim 18, wherein a difference between a prepreg dimension y (mm) and a glass fiber base material width dimension x (mm) as a starting material satisfies the equation (1):0.3(%)≧( x−y)/x×100 (1).20. The method of preparing a prepreg according to claim 19, wherein the glass fiber base material is a glass woven fabric or a glass non-woven fabric.21. The method of preparing a prepreg according to claim 20, wherein the class fiber base material comprises a woven fabric, and a relationship between a gas permeability q (cc/cm2/sec) and a thickness z (&mgr;m) satisfies the equation (4):q≦− 0.1z+25 (4).22. The method of preparing a prepreg according to claim 20, wherein the glass fiber base material comprises a non-woven fabric and its weight weighing is 30 to 100 g/m2.23. A prepreg prepared by the method according to claim 22.24. A metal clad laminated board which comprises the prepreg according to claim 23 or a laminated material thereof and a metal foil laminated on at least one surface of the above material under heating and pressure, and subjected to molding.25. A printed wiring board which comprises applying a circuit processing to the metal clad laminated board according to claim 24.
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