Polyketone Fiber Paper, Polyketone Fiber Paper Core Material For Printed Wiring Board, And Printed Wiring Board

Abstract

An aliphatic polyketone fiber paper comprising aliphatic polyketone fibers and a polyketone fiber paper core material for a printed wiring board are provided. The polyketone fiber paper and the core material have high strength and modulus of elasticity; excellent dimensional stability, chemical resistance, heat resistance, adhesiveness and electrical insulation; and low dielectricity and water absorbance, and are thin, porous, and uniform. A printed wiring board prepared from the core material having a low dielectric constant, dimensional stability, electrical insulation, and properties of being uniformly bored by laser punching is also provided. The aliphatic polyketone fiber paper and the core material for a printed wiring board comprises 1 to 100% by mass of aliphatic polyketone fibers which comprise the repeating unit of the below-mentioned formula (1), the fibers having an average fiber length of 0.5 to 10 mm, an average fiber diameter of 0.1 to 20 μm, a thickness of 5 to 200 μm, a void ratio of 30 to 90%, and a strength per unit mass of 100 MN / kg or more. Also provided is a single layer or multilayer printed wiring board which comprises a core material impregnated or coated with a polymer resin, a low dielectric polymer resin, or a polyphenylene ether-based epoxy resin.—CH2—CH2—CO—  (1)

Description

TECHNICAL FIELD

[0001] The present invention relates to a polyketone fiber paper which comprises 1 to 100% by mass of aliphatic polyketone fibers and which is obtained by a wet paper making process, a polyketone fiber paper core material for a printed wiring board, and a printed wiring board using the polyketone fiber paper core material.

[0002] More particularly, the present invention relates to a polyketone fiber paper which comprises aliphatic polyketone fibers, which has high strength and modulus of elasticity; excellent dimensional stability, chemical resistance, heat resistance, adhesiveness, and electrical insulation; and low dielectricity and water absorbance, and which is light, thin, and porous with uniform pores, a polyketone fiber paper core material for a printed wiring board, and a printed wiring board using the polyketone fiber paper core material.BACKGROUND ART

[0003] In recent years, the manufacture of synthetic fiber paper using synthetic fibers instead of wood pulp has ...

Examples

example 1

[0074]100% by mass of aliphatic polyketone staple fibers with an average fiber diameter of 10 μm and fiber length of 3 mm were charged to a pulper, followed by the addition of water warmed to 50° C., to obtain a polyketone staple fiber water dispersion (fiber concentration: 2% by mass). The dispersion liquid was stirred for 15 minutes. Water was added to the dispersion liquid to make the fiber concentration 1% by mass. A defoamer (polyoxyalkylene glycol fatty acid ester) was added in an amount of 0.5% by mass of the amount of fibers, and the mixture was stirred for 30 minutes in a low-speed stirring vessel. Water was further added to the fiber dispersion liquid to adjust the slurry concentration to 0.1% by mass, followed by the addition of 20 ppm of a viscosity controlling agent (polyethylene oxide). The resulting slurry was deaerated under vacuum immediately before making paper using a cylinder paper machine equipped with a 100 mesh wire at a rate of 30 m / min. The wet paper thus pr...

examples 2 to 9

[0077]Polyketone fiber papers and polyketone fiber paper core materials for a printed wiring board were prepared in the same manner as in Example 1 using the aliphatic polyketone fibers shown in Table 2. Conditions differing from the conditions of Example 1 are described in Table 2. Printed wiring boards were prepared in the same manner as in Example 1 using the core materials.

example 10

[0078]Printed wiring boards were prepared in the same manner as in Example 1 by immersing the polyketone fiber paper core materials for a printed wiring board prepared in Example 1 in an epoxy resin solution (polyphenylene ether-based epoxy resin: 100 parts by mass, dicyandiamide curing agent: 3 parts by mass) with a solid component content of 45%.

TECHNICAL FIELD

[0001] The present invention relates to a polyketone fiber paper which comprises 1 to 100% by mass of aliphatic polyketone fibers and which is obtained by a wet paper making process, a polyketone fiber paper core material for a printed wiring board, and a printed wiring board using the polyketone fiber paper core material.

[0002] More particularly, the present invention relates to a polyketone fiber paper which comprises aliphatic polyketone fibers, which has high strength and modulus of elasticity; excellent dimensional stability, chemical resistance, heat resistance, adhesiveness, and electrical insulation; and low dielectricity and water absorbance, and which is light, thin, and porous with uniform pores, a polyketone fiber paper core material for a printed wiring board, and a printed wiring board using the polyketone fiber paper core material.BACKGROUND ART

[0003] In recent years, the manufacture of synthetic fiber paper using synthetic fibers instead of wood pulp has ...

Examples

example 1

[0074]100% by mass of aliphatic polyketone staple fibers with an average fiber diameter of 10 μm and fiber length of 3 mm were charged to a pulper, followed by the addition of water warmed to 50° C., to obtain a polyketone staple fiber water dispersion (fiber concentration: 2% by mass). The dispersion liquid was stirred for 15 minutes. Water was added to the dispersion liquid to make the fiber concentration 1% by mass. A defoamer (polyoxyalkylene glycol fatty acid ester) was added in an amount of 0.5% by mass of the amount of fibers, and the mixture was stirred for 30 minutes in a low-speed stirring vessel. Water was further added to the fiber dispersion liquid to adjust the slurry concentration to 0.1% by mass, followed by the addition of 20 ppm of a viscosity controlling agent (polyethylene oxide). The resulting slurry was deaerated under vacuum immediately before making paper using a cylinder paper machine equipped with a 100 mesh wire at a rate of 30 m / min. The wet paper thus pr...

examples 2 to 9

[0077]Polyketone fiber papers and polyketone fiber paper core materials for a printed wiring board were prepared in the same manner as in Example 1 using the aliphatic polyketone fibers shown in Table 2. Conditions differing from the conditions of Example 1 are described in Table 2. Printed wiring boards were prepared in the same manner as in Example 1 using the core materials.

example 10

[0078]Printed wiring boards were prepared in the same manner as in Example 1 by immersing the polyketone fiber paper core materials for a printed wiring board prepared in Example 1 in an epoxy resin solution (polyphenylene ether-based epoxy resin: 100 parts by mass, dicyandiamide curing agent: 3 parts by mass) with a solid component content of 45%.