JPS5915566A - Tab formation of glass cloth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The invention is based on a feather edge woven using a shuttleless loom such as an air jet loom! Heat-cleaned or further surface-treated glass cloth is made with thermoplastic tape or filament melted to avoid bulk and prevent fraying of the selvedge threads. This invention relates to a method for forming edges of glass cloth, which comprises slitting the part after fitting.

Feathers woven using shuttleless looms such as air jet looms
When manufacturing copper-clad laminates for printed boards used in π-element R1 devices such as computers by IP-ing glass cloth with edges, usually f=j, first impregnate epoxy resin with gold, f harden, and then apply Gripreg. Manufactured. However, in the case of Fujazaresoji part, the resin is soaked in a multi-image @.
Because it becomes thicker than the glass cloth base and hardens, when a certain amount of Gripreg is stacked and press-formed, only the feather edges are piled up high and become a dowel. Moreover, feather
The edges harden into needle-like shapes and may end up in the operator's hands, or they may break and become electrostatically attracted to the surface of other prepregs, leaving marks on the silver foil during pressing and causing defective products. Is there a problem with generating it? I have it.

Therefore, the use of glass cloth with feather edges is discouraged. In addition, the feather edge is usually in the shape of a tuft of 3 to 10 pieces in length, and the border between the feather edge and the glass cloth is secured with an IP-locking thread.
However, if you shorten the feather edge too much, the interlocking threads will come off and the warp threads that hold the ground will fray from the ends.

In order to avoid the drawbacks mentioned above, it was attempted to cut and remove the edges using a laser, but in that case the melt adhesive strength was weak, so the varnish coating was difficult to apply. 1 The spun yarn sometimes frayed and caused problems such as being wound around the roll.

This invention was made by focusing on the above-mentioned circumstances; the purpose was to cut and remove the feather edge, or to harden it into a sheet, cut it, and create a new glass cloth with substantially the same thickness as the base. To provide a method for forming a selvedge that firmly seals the warp threads so that they do not fray.

The ear shape [y, method according to the present invention] is a glass cloth having a noezer, edge 'fr, woven on a shuttleless loom and heat-cleaned or further surface-treated.
It is not bulky like crow cloth, and the threads on the ears are -1.
In forming the selvedges that are fixed so as not to touch the glass cloth, on the feather edge of the glass cloth, in the vicinity of the ground entanglement thread, on the ground part of the glass cloth inside the border entanglement thread, or in a region that straddles two or more of these parts. It is characterized by applying a thermoplastic resin tape or filament to the area and melting and impregnating the area with the resin by applying pressure at the same time as 710 heat or while removing the blood, and then slitting the area.

The present invention will be explained in detail below.

When glass cloth is generally used for reinforced plastics or printed circuit boards, it is heat cleaned and then surface treated with a silane compound to improve the adhesion between the matrix resin and the glass cloth. Ru. Therefore, if a growth-promoting filler is applied before the heat cleaning process, the filler will be thermally decomposed during the heat cleaning process. Therefore, it is necessary to perform sealing after the heat cleaning process. Therefore, a filler is applied in the warp direction to the edges of the heat-cleaned or further surface-treated glass cloth.

It is important to keep the application slip and application form of the eye eyelid constant in order to achieve a uniform eye seal.

When there is an operational problem with the equipment and it is inevitable to stop operation, a method is required that can reduce the supply of sealant depending on the operating situation. Tape the sealant. By supplying monofilament 110 in the form C, it becomes possible to easily synchronize the feeding of the glass cloth and the feeding of the lubricant, and the above requirements are met. Although it is possible to supply it in powder or liquid form, it is difficult to control the supply amount in accordance with the feeding of the glass cloth, and there are some cases in which an excessive amount of filler adheres to the area where the cloth stops, especially when the cloth stops.

It is necessary that the filler applied in tape form or in the form of monofilament or other threads be a thermoplastic resin. Thermosetting resin is semi-cured B (B stage)
It is difficult to make into a tape or filament, and it is difficult to use as a filler if it cures too much or not enough, and it generally takes a long time to cure, which causes problems in terms of sealing efficiency. Unfortunately, it cannot be put to practical use.

There are various kinds of thermoloe plastic resins, but especially when glass cloth is used for printed circuit boards, etc., it does not dissolve in solvents during the resin impregnation process, does not lose its sealing function, and does not dissolve and mix with the matrix resin. It is necessary that the electrical properties of the printed circuit board are not adversely affected. At present, most epoxy resins are used as the 7-trix resin, and dibutylpolamide, metelcerone rub, acetone, methyl ethyl ketone, quinlun, etc. are used as the solvent. Furthermore, as a matrix resin,
Polyimide, 7-anate resin, and BTm resin (bismaleimide triazine resin) are used. Therefore, the thermoplastic resin used in the present invention is selected from those that are compatible with such matrix resins, do not adversely affect the electrical properties of the product, and are insoluble in the above-mentioned solvents.

Thermoplastic resins satisfying the above-mentioned requirements include - aromatic polyesters such as polyethylene terephthalate and polybutylene tylenophthalate, nz or prephthalic acid, isophthalic acid and/or carbon atoms 15.
It is composed of a dicarboxylic acid component consisting of a saturated aliphatic dicarboxylic acid having 4 to 20 carbon atoms and a glycol component consisting of an alkylene glycol having 2 to 10 carbon atoms. Pigor's death and acrylic m1
Copolymers of polyglopylene, polyethylene, or brero υ and/or ethylene with unsaturated hydrocarbons such as butene or vinyl compounds, and mono-element polymers and sulfonated polyolefins; and polyamides such as nylon 6 and nylon 66. Although these thermoplastic resins have high melting temperatures and melting viscosity, heat conduction is improved by applying them in the form of tapes, monofilaments, or other filaments.
If you apply power at the same time or after heating (with JO heat filter, etc.), you can easily melt and impregnate the feather edges of the glass cloth. Taking this into account, it is preferable to use polyethylene, which has a low melting temperature and is easily available. In particular, low-density polyethylene (specific gravity 0.910-0
．． 925) is advantageous.

Furthermore, it is recommended that the thickness of the thermo-OT plastic resin tape or the diameter of monofilament or other filament be less than twice the thickness of the glass cloth, in order to balance heat conduction and the air of the sealant impregnated into the glass cloth. preferable. If the thickness or diameter exceeds twice, the melting rate will be slow, impregnation will be poor, and the filler will be cast to become wider than necessary, and the width will become irregular, which is not preferable. Make sure that the resin content in the print temporary medium is 30-40 g.
Considering the thickness of the tape i and the diameter of the monofilament or other filament, the thickness of the glass cloth is -
! If the glass cloth is impregnated from both sides of the glass cloth with a thickness of less than -4, a sealing effect of 4 minutes can be obtained.

On the other hand, when melting and impregnating the tape or monofilament of the thermoplastic resin, melt viscosity 11I
It is preferable to reduce t' as much as possible, and in order to make the thickness of the sealing part substantially the same as the thickness of the glass cloth, it is preferable to use 0 heat as long as the thermoplastic resin does not decompose thermally. It is better to lower the temperature further.Kyoi O's crow cloth is different from other base materials because it can withstand 2F)4tJO℃ without any change in 10>r.
It is Noh. It varies slightly depending on the resin, but generally 1
Heating to 50-40 +1"C facilitates melt impregnation of Cannes cloth. Shikashi, Qj"jt, <
TI'125 (1-351J''C) is suitable.

If 151.1'C is not accepted, resin flow is poor and impregnation is not good, and unfortunately, when 4111)t; k is exceeded, resin decomposition generally begins to occur.

Since it uses thermoplastic resin TAG, monofilament, and other filamentous materials, even if it is impregnated with glass cloth, it will be sealed into a sheet, and if slit with a knife, it will be cut without any unevenness. A cut edge is obtained and the object of the invention is achieved. In addition, if the ground tangle thread is closed with a metal blind (-5), the ground tangle thread can be left behind to obtain a -1- strong cutting edge, and the ground part of the glass cloth inside the ground tangle thread or It is possible to mark the area that spans two or more of these parts.In any case, the seal should be made to a thickness that is substantially the same as the thickness of the glass cloth. It is important to make the thickness of the evil glass cloth substantially the same as that of the non-impregnated part. ,000m 1
If you roll it up to a zero angle, problems such as the ears being too high and tearing will occur. If the edges are too high, the prepreg will also be too high when used for printed boards, causing problems such as overlapping press molding and wrinkles getting into the copper foil. This problem is unique to the printed circuit board manufacturing process, in which hard, semi-hardened prepregs are made completely and a suitable number of prepregs are taken and press-molded. This is the first time in history that glass cloth with feather edges has become a new problem.

The embodiments of the A.2 invention will be explained above.

Example 1 A glass cloth with a thickness of 0.18 mm woven in an air jet loom and surface-treated with epoxy silane was coated with a fiber having a specific gravity of 0.91.0 and a melting point of 174°C.
Made of polypropylene with a lip thickness of 0.1mm and a width of 5mr.
QCr) y'-pu'e flow] 2. Heat to 110 degrees Celsius and coat the surface with Teflon coachine/L, 1M diameter 20 cm
While pressing the roll with a pressure of 9/ryn on the 20 with a roll of 20 crR around the roll, roll it for 3 m.
It ran at a speed of 1 minute. Polypropylene was melt-impregnated and sealed along the ``y'' and ``A'' threads to a thickness of 0.20 +++ m on the edges of the glass cloth. When the center of this sealing part was slit with a slitter, the sealing was so strong that only 11 pieces came out. When we made prepreg impregnated with epoxy resin from this filler fabric and made an 8-gly mesh plate, we found that there were problems with the height of the edges, marks, and the problem of polypropylene leaching into the epoxy resin. It did not occur.

Example 2 Glass cloth with a final thickness of 0.18 mm woven in an air jet loom and surface treated with epoxy silane was coated along the warp with a specific gravity of 0.921, a melt index of rlixom, and a number average molecular weight of 28. ,000
Made of high-pressure polyethylene with a thickness of 0.1 m and a width of 511 mm.
The finote tape was heated to 250°C for 710°C, and was run at a speed of 6 m/min while being pressed at a pressure of 5 m/min with a roll of 20 cIt in diameter and a roll of 20 c+a in diameter, the surface of which was coated with Teflon. . The polyethylene is melt-impregnated and the thickness of the sealed part is 0.
When the center of this sealing part, which was 19m in length, was slit with a slitter, it was found that the sealing was strong enough to prevent fraying. When I attached the epoxy resin-impregnated prepreg from this filler fabric to a copper-clad laminate of 8 P2, no problem with the height of the edges or the problem of marks occurred.

Furthermore, there were no problems at all with steel-clad laminates obtained from prepregs impregnated with polyimide, cyanate resin, and BT resin instead of epoxy resin.

Example 3 In place of the polypropylene in Example 1, low pressure polyethylene was used with a ratio of io of 945. Melting point: 130°C, melt index: 0.3 dll/mra, average molecular weight [8
When the same method as in Example 1 was repeated using a tape made of 5,000 yen tape with a thickness of 0.1 m and a width of 5 mm,
The thickness of the sealing part was 0.20M, and no problems with tl tangle or ear height were observed.

Example 4゜Thickness 0118ffl woven with Airgie Sotoloom
! 11 glass cloth whose surface was treated with epoxy silane, and a polyethylene terephthalate film (trade name: Mylar, Toshishinari) with a thickness of 0.1 mm slit to a width of 5M was placed on the feather edge of the glass cloth. Run along the entangled thread and onto the feather edge. A polyester tape is sandwiched between the roll and glass cloth on a roll with a diameter of 20 bacteria whose surface is heated to 350℃ and the surface is coated with Teflon, and when the tape is reversed in the same direction as the input direction and sent out, the surface is exposed from the top and bottom of this roll. 10 pieces each in Teflon-coated rolls.
It was held down with a pressure of Y/α and run at a speed of 5 m/min. Polyester was melt impregnated into the feather edges to form a sheet at the ears. The thickness after sealing was 0.15 m, and when this part was slit using the St-slitter at the center, no problems with fraying or edge height were observed.

Example 5 In Example 4, instead of polyethylene terephthalate, polybutylene terephthalate and BoIJ (2,
When the same method as in Example 4 was repeated using a film of 6-dimethyl-1,4-phenylene ether), results similar to V were obtained, and the film could be used for printed board applications without any problems. Example 6゜The same method as in Example 4 was repeated using a film of nylon 6 and nylon 66 ("Leona" film, non-chemically treated pear) instead of the polyethylene terephthalate in Example 4, and the results were similar to V. The results obtained were as follows, and it could be used for printed board applications without any problems.

Example 7゜The thickness of the high-pressure polyethylene tape in Example 4 was reduced to 0.
．． 5, 0.35, 0.2, 0.1, 0.1+
I changed it to 5.0.01 and tested it. n1 heat roll 2
When the temperature was set at 50°C, it was found that the 0.01 mm tape did not provide sufficient sealing, and the 0.05 mva tape provided a temporary seal, and the 0.00.1 mm tape provided an adequate seal. The seals for 2-kaku, Q, and 35mm are satisfactory, but the flow of polyethylene is large and the seals are wide.

At 0.51, the flow was large and the thickness of the sealing part was too thick at 0.27 mm.

In addition, when using a high-pressure polyethylene monofilament roller, the diameter was 0.36 mm to 0.20 trrm.
The closing width was also appropriate, but the diameter was 0.18 to 0.04 m.
When the M type was used side by side, it was replaced with one with an excessive sealing width, and this was no different from sealing with tape. Also, regarding the closing width, i
It has been found that appropriate damping can be achieved by changing the width of the loop or the number of monofilaments.

As is clear from the above examples, the glass cloth with ears formed according to the present invention has the problem of being bulky compared to the feather edge cloth, and the feather edges harden into needles and get stuck in the hands of workers. It is particularly suitable for printed circuit board applications because it does not cause problems such as damage to the copper foil during pressing due to bending or bending on the surface of the prepreg, and problems when handling the prepreg sheet with a robot in the post-process of the prepreg process. It was excellent.

Claims (1)

[Scope of Claims] 1. A glass cloth with feather edges woven on a shuttleless loom that is heat-cleaned or further surface-treated so that it is not bulky and the threads at the edges do not fray. To form the sealed selvedges, a thermoplastic resin is applied to the feather edge of the glass cloth, near the ground thread, to the base of the glass cloth inside the ground thread, or to a region spanning two or more of these parts. A method for forming edges of glass cloth, which comprises applying a thread-like material to the tape or applying pressure at the same time as 710 heat or immediately thereafter to melt and impregnate the resin, and then slitting the region. 2. As thermoplastic resins, polyethylene terephthalate and polybutylene terephthalate, and copolymers thereof, polyphenylene ether and graft polymers thereof, polypropylene, polyethylene, copolymers containing propylene and/or ethylene, and modified polyolefins by graft polymerization; A method according to claim 1 in which a resin selected from nylon 6 and nylon 66 is used. 3. The method according to claim 1, in which low-density polyethylene having a specific io of 910 to 0.925 is used as the thermoplastic resin. 4. The method according to claim #41, characterized in that the thickness of the thermoplastic resin tape or the II diameter of the filamentous body is set to be less than twice the thickness of the glass cloth. 5. When melting and impregnating the thermoplastic resin tape or filament on the feather edge of the glass cloth, near the ground twine, or on the base of the glass cloth, the heating temperature should be set to 150-4.
The method according to claim 1 or claim 2, characterized in that the temperature is 00°C. 6. Apply thermoplastic resin tapes or filaments to the top and bottom surfaces of the glass cloth separately or simultaneously, and apply pressure at the same time as or immediately after heating the egg to straddle the top and bottom edges of the glass cloth, near the ground twining threads. The method according to claim 1, wherein the base portion of glass cloth is impregnated with melt. 7. For glass cloth with ferri'-edges woven with a shuttleless loom such as an air jet loom, no heat is applied.
Apply J plastic resin to a thickness that is substantially the same as the fabric thickness - on the feather edge of the glass cloth, on the top, near the ground thread - on the ground part of the glass cloth inside the pond thread, or across two or more of these parts. Claim 1 for preparing a glass cloth for printed circuit boards, which is made of molten gold and whose matrix resin is epoxy resin-polyimide, cyanate resin or BT resin (bismaleimide triazine resin).
The method described in section.