JPS62108011A - Preparation of laminated plate - Google Patents

Abstract

PURPOSE:To obtain a method for preparing a laminated plate having excellent heat resistance and anti-water absorbability by using a prepreg dehydrated and degased under a specified atmospheric temp. and a specified degree of vacuum. CONSTITUTION:A prepreg dehydrated and degased under an atmospheric temp. at 40-50 deg.C and a degree of vacuum below 50mmHg is used for lamination. Bubbles and water being included inside and absorbed on the surface of the prepreg can be thereby removed and the spaces where bubbles and water have been removed can be filled with a resin. A laminated plate having excellent heat resistance and anti-water adsorbability can be thereby obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for manufacturing a laminate used in electrical equipment, electronic equipment, computers, communication equipment, etc.

[Background technology]

Conventionally, laminates have been prepared by impregnating a base material such as paper or galane cloth with resin varnish and then heating and drying the resulting prepreg, which is then stored in a storage room and taken out for use as needed. The storage room is usually heated to 5℃, humidity is 60 to 6596 degrees Celsius, and the humidity is 60 to 6596 degrees Celsius, and the moisture absorption of the prepreg and prevention of reaction progress are only carried out in a constant temperature room. There was no way to improve sexuality.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing a laminate having excellent heat resistance and water absorption resistance.

[Disclosure of the invention]

The present invention relates to a method for manufacturing a laminate in which a required number of 1 Resoreg is stacked, and if necessary, metal foil is arranged on the upper and/or lower surfaces of the laminate. ℃ and a vacuum level of 50 m Hg or below ,
The traces of moisture removal can be filled with resin, so l1
11 A laminate plate having excellent heat resistance and water absorption resistance can be obtained, and the present invention will be described in detail below.

The prepreg used in the present invention includes resins such as pheno-1v resin, cresol resin, Evoquin resin, unsaturated polyester resin, melamine resin, polyimide, polybutadiene, polyamide, polyamideimide, and poly7-IL.
/Fon, polybutylene terephthalate, polyether ether ketone, fluorinated resin, etc. alone, modified products, mixtures, etc. are used, and water, methyl alcohol is used to adjust the viscosity as necessary.
The base material is a woven fabric made of inorganic fibers such as glass and asbestos, organic synthetic fibers such as polyester, polyamide, polyvinyl alcohol, and acryl μ, and natural fibers such as cotton. , nonwoven fabric, mat, paper, or a combination thereof. The metal foil may be made of copper, aluminum, iron, nickel, etc., alone or in an alloy, and if necessary, an adhesive layer may be provided on the side of the metal foil facing the prepreg. The prepreg used for lamination molding has an atmosphere tX degree ω~50,
'c, the prepreg must be dehumidified and degassed under a vacuum Ilf50 ttra Hg or less. This is because dehumidification and degassing are not performed when the ambient temperature is below 0°C, and when it exceeds 0°C, the reaction progresses and moldability deteriorates. This is because when the degree of vacuum exceeds 50 m Hg, dehumidification and degassing are not performed. Preferably, it is preferable to separate the prepregs one by one for easier dehumidification and deaeration treatment. It is preferable that the dehumidification and deaeration treatment time be within the gloss period. This is because if the temperature is exceeded, the reaction will proceed and the moldability will tend to deteriorate.

The present invention will be explained below based on examples.

Example 1 Eight sheets of paper prepreg impregnated with 0.2H 7-Kol resin, which had been stored for 3 days in a constant temperature and constant temperature room at 00% humidity, were stacked together, and the ambient temperature was 0°C. Dtrap Hg was dehumidified and degassed in a degassing chamber for a minute, and then a laminate with m14Wr with a thickness of 5 microns disposed on the upper and lower surfaces of the eight prepregs was molded at a pressure of 100 fil/ci. ,1
A copper clad laminate with a thickness of 1.6M was obtained by dip-layer molding at 60''C for ω minutes.

Example 2 Paper prepregs impregnated with 7-technol resin with a thickness of 0.2'l!I, which had been stored for 3 days in a constant temperature and humidity room with a humidity of 20"C and ω%, were placed one by one on a multi-shelf shelf, and the prepregs were heated to an ambient temperature of °C. C, degree of vacuum 3)
After dehumidifying and degassing the IaIHH for 5 minutes in a degassing chamber, 8 sheets of the prepreg were stacked on top of each other, and a 5-micron-thick steel foil was placed on the bottom surface of each layer. (
d, laminated for ω minutes at 160°C to a thickness of 1,6j
A copper-clad laminate of El was obtained.

Comparative Example 20"C, 8 sheets of phenol resin-impregnated paper prepreg with a thickness of 0.21i1 stored for 3 days in a constant temperature and humidity room at 60% humidity were stacked on top of each other, and a 5 micron thick copper foil was placed on the bottom of each sheet. The arranged laminate was molded under a molding pressure of 100 k%/(yll, 16
Lamination molding was performed at 0°C for ω minutes to obtain a copper-clad laminate with a thickness of 1.6 M.

〔Effect of the invention〕

The thermal properties and water absorption of the laminates of Examples 1 and 2 and Comparative Example are as follows:
As is clear from Table 1, the performance of the present invention was good, confirming the superiority of the method for producing a laminate of the present invention.

Chapter 1 Table

Claims (2)

[Claims] (1) A method for manufacturing a laminate in which a required number of prepregs are stacked and, if necessary, metal foil is arranged on the upper and/or lower surfaces of the laminate. A method for producing a laminate, characterized in that a prepreg that has been dehumidified and deaerated at a vacuum degree of 50 mmHg or less is used. (2) The method for manufacturing a laminate according to claim 1, wherein the prepregs are separated and processed one by one.