CN107385936B - A method for preparing PTFE varnished cloth, PTFE varnished cloth and metal foil-clad laminate prepared by the method - Google Patents
A method for preparing PTFE varnished cloth, PTFE varnished cloth and metal foil-clad laminate prepared by the method Download PDFInfo
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- CN107385936B CN107385936B CN201710565141.1A CN201710565141A CN107385936B CN 107385936 B CN107385936 B CN 107385936B CN 201710565141 A CN201710565141 A CN 201710565141A CN 107385936 B CN107385936 B CN 107385936B
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- 239000004744 fabric Substances 0.000 title claims abstract description 164
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 121
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 46
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 9
- 239000002184 metal Substances 0.000 title claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 93
- 239000011248 coating agent Substances 0.000 claims abstract description 92
- 239000003365 glass fiber Substances 0.000 claims abstract description 76
- 239000003292 glue Substances 0.000 claims abstract description 68
- 238000005245 sintering Methods 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000007598 dipping method Methods 0.000 claims abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 239000011256 inorganic filler Substances 0.000 claims description 4
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 4
- 239000011889 copper foil Substances 0.000 claims description 3
- -1 lithopone Chemical compound 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 2
- 229910002113 barium titanate Inorganic materials 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052599 brucite Inorganic materials 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000008262 pumice Substances 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- 239000005909 Kieselgur Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 claims 1
- 229910021487 silica fume Inorganic materials 0.000 claims 1
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 238000004026 adhesive bonding Methods 0.000 abstract description 29
- 238000007665 sagging Methods 0.000 abstract description 6
- 239000011521 glass Substances 0.000 description 13
- 239000010410 layer Substances 0.000 description 13
- 239000003973 paint Substances 0.000 description 13
- 229910052802 copper Inorganic materials 0.000 description 11
- 239000010949 copper Substances 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 239000002966 varnish Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 6
- 239000004922 lacquer Substances 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0022—Glass fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/061—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with fluoropolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2213/00—Others characteristics
- D06N2213/02—All layers being of the same kind of material, e.g. all layers being of polyolefins, all layers being of polyesters
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
Abstract
Description
技术领域technical field
本发明属于覆铜板制备领域，涉及一种制备PTFE漆布的方法、由该方法制备的PTFE漆布和覆金属箔层压板。The invention belongs to the field of copper clad laminate preparation, and relates to a method for preparing PTFE lacquer cloth, the PTFE varnish cloth prepared by the method and a metal foil-clad laminate.
背景技术Background technique
聚四氟乙烯(PTFE)自1945年由杜邦公司商品化生产以来，由于该材料特有的物理性能和化学性能，人们就不断地开拓该材料在各个领域的应用，其中利用PTFE材料的优秀介电性能(低介电常数和低介质损耗)来制造高频应用的覆铜板至今已有多年历史。Since the commercial production of polytetrafluoroethylene (PTFE) by DuPont in 1945, due to the unique physical and chemical properties of this material, people have been continuously developing the application of this material in various fields, among which the excellent dielectric properties of PTFE material are used Performance (low dielectric constant and low dielectric loss) to manufacture copper clad laminates for high frequency applications has been around for many years.
传统的PTFE覆铜板是使用电子级玻纤布浸渍PTFE乳液后，再经过“立式上胶机”进行上胶后烧结，得到PTFE漆布，再两面覆上铜箔，压制成PTFE覆铜板。例如CN105904806、CN105898984和CN102198745均公开了用玻璃纤维布浸渍PTFE树脂，用立式上胶机获得半固化片，但是由于PTFE树脂的难粘性，此方法需要经过多次循环“浸渍—干燥—烘焙—烧结”的工序后才能获得较高树脂含量的PTFE玻纤布漆片，因为需要多次上胶(根据所需厚度的不同，一次上胶只能增加约10～20μm的厚度)，如需要一张约100μm的漆布，就要反复上胶多达5次以上甚至更多次数才能达到，这样的生产方法有能耗大、生产效率低的缺点。The traditional PTFE CCL is to use electronic grade glass fiber cloth to impregnate PTFE emulsion, and then go through the "vertical gluing machine" for gluing and sintering to obtain PTFE varnish, then cover both sides with copper foil, and press it into PTFE CCL. For example, CN105904806, CN105898984 and CN102198745 all disclose impregnating PTFE resin with glass fiber cloth, and obtain prepreg with vertical gluing machine, but due to the difficult stickiness of PTFE resin, this method needs to go through multiple cycles of "dipping-drying-baking-sintering" The PTFE glass fiber cloth paint sheet with higher resin content can only be obtained after the above-mentioned process, because multiple gluing is required (according to the required thickness, one gluing can only increase the thickness by about 10-20 μm), if you need a sheet of about The 100μm varnished cloth has to be glued up to 5 or more times to achieve it. Such a production method has the disadvantages of high energy consumption and low production efficiency.
CN 104553224公开了一种粘性漆布制作方法，包括玻纤布浸渍、玻纤布烘干、高温烧结、中间漆布成型、中间漆布覆胶、中间漆布烘干、粘性漆布成型等步骤，该发明中同样是利用立式上胶机需要多次涂覆才能达到预期的厚度。CN 104553224 discloses a method for making sticky varnish, which includes the steps of impregnating glass fiber cloth, drying glass fiber cloth, high-temperature sintering, forming the middle varnish, coating the middle varnish with glue, drying the middle varnish, and forming the sticky varnish. It is the use of vertical gluing machines that require multiple coats to achieve the desired thickness.
目前的立式上胶机对玻璃纤维布进行双面浸润上胶，由于是立式上胶，漆布受到重力作用，漆布上树脂层在上胶后未烘干前容易产生表观流挂，使得每次上胶树脂层厚度有限，在制作PTFE覆铜板时，只能通过多张叠加，才能达到预定厚度，这也大大影响了生产效率。The current vertical gluing machine performs double-sided infiltration and gluing on the glass fiber cloth. Because it is vertical gluing, the varnished cloth is subjected to gravity, and the resin layer on the varnished cloth is prone to apparent sagging after gluing and before drying, making The thickness of the gluing resin layer is limited each time. When making PTFE copper clad laminates, the predetermined thickness can only be achieved by stacking multiple sheets, which also greatly affects the production efficiency.
因此，在本领域中期望开发一种可以减少玻璃纤维布的涂胶次数，增加胶层厚度并提高覆铜板生产效率的方法。Therefore, it is desired to develop a method in the art that can reduce the number of glue coatings of glass fiber cloth, increase the thickness of the glue layer and improve the production efficiency of copper clad laminates.
发明内容Contents of the invention
针对现有技术的不足，本发明的目的在于提供一种制备PTFE漆布的方法、由该方法制备的PTFE漆布和覆金属箔层压板，本发明的方法可以减少玻璃纤维布的涂胶次数，增加胶层厚度并提高覆金属箔层压板的生产效率。For the deficiencies in the prior art, the object of the present invention is to provide a kind of method for preparing PTFE varnish, the PTFE varnish prepared by the method and the metal-clad laminate, the method of the present invention can reduce the gluing times of glass fiber cloth, increase bondline thickness and improve the production efficiency of metal clad laminates.
为达到此发明目的，本发明采用以下技术方案：To achieve this purpose of the invention, the present invention adopts the following technical solutions:
一方面，本发明提供一种制备PTFE漆布的方法，所述方法包括以下步骤：On the one hand, the invention provides a kind of method for preparing PTFE paint cloth, described method comprises the following steps:
(1)将玻纤布进行一次浸渍PTFE胶液，而后烧结，得到一次浸胶玻纤布；(1) glass fiber cloth is impregnated with PTFE glue solution once, and then sintered to obtain once impregnated glass fiber cloth;
(2)利用卧式涂覆机在步骤(1)得到的一次浸胶玻纤布的一面涂覆PTFE胶液，干燥、烧结，得到一面涂胶的PTFE漆布；(2) one side of the dipped fiberglass cloth obtained in step (1) is utilized to coat PTFE glue solution by a horizontal coating machine, dry and sinter to obtain a PTFE paint cloth coated with glue on one side;
(3)利用卧式涂覆机对步骤(2)得到的PTFE漆布的另一面涂覆PTFE胶液，干燥、烧结，得到两面涂胶的PTFE漆布。(3) Utilize a horizontal coating machine to coat the other side of the PTFE varnished cloth that step (2) obtains with PTFE glue, dry and sinter to obtain the PTFE varnished cloth coated with glue on both sides.
在本发明中，利用卧式涂覆机对玻纤布进行涂覆PTFE胶液制备PTFE漆布可以减少涂胶次数，仅需要两面各进行一次水平涂覆即可得到所需厚度的漆布，并且可以避免产生表观流挂的现象，增加上胶的胶层厚度，提高生产效率。In the present invention, using a horizontal coating machine to coat glass fiber cloth with PTFE glue to prepare PTFE lacquer can reduce the number of times of gluing, and only need to carry out horizontal coating on both sides to obtain the varnished cloth of required thickness, and can Avoid the phenomenon of apparent sagging, increase the thickness of the glue layer, and improve production efficiency.
优选地，步骤(1)所述玻纤布为电子级玻纤布或非电子级玻纤布。Preferably, the glass fiber cloth in step (1) is electronic grade glass fiber cloth or non-electronic grade glass fiber cloth.
在本发明中，步骤(1)对玻纤布的处理对于后续利用卧式涂覆机进行胶液涂布是必不可少的步骤，在本领域中，只有树脂膜才能利用卧式涂覆机完成胶液涂覆以制备漆布，直接对玻纤布完成胶液涂覆，会存在玻纤布浸润不良的问题，经过本发明步骤(1)处理后的玻纤布适用于卧式涂覆机胶液涂覆。In the present invention, the treatment of glass fiber cloth in step (1) is an indispensable step for the subsequent use of a horizontal coating machine for glue coating. In this field, only the resin film can be used for horizontal coating. Complete the glue coating to prepare varnish cloth, and directly finish the glue coating on the glass fiber cloth, there will be the problem of poor infiltration of the glass fiber cloth, and the glass fiber cloth after the step (1) of the present invention is suitable for horizontal coating machines Glue coating.
优选地，步骤(1)所述烧结的温度为360～380℃，例如360℃、365℃、368℃、370℃、375℃、378℃或380℃。Preferably, the sintering temperature in step (1) is 360-380°C, such as 360°C, 365°C, 368°C, 370°C, 375°C, 378°C or 380°C.
优选地，步骤(2)所述涂覆的厚度为10-300μm，例如10μm、13μm、15μm、20μm、30μm、40μm、50μm、60μm、80μm、100μm、120μm、150μm、180μm、200μm、220μm、240μm、260μm、280μm或300μm，优选30-300μm，进一步优选60-300μm。Preferably, the thickness of the coating in step (2) is 10-300 μm, such as 10 μm, 13 μm, 15 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 80 μm, 100 μm, 120 μm, 150 μm, 180 μm, 200 μm, 220 μm, 240 μm , 260 μm, 280 μm or 300 μm, preferably 30-300 μm, more preferably 60-300 μm.
本发明中，可以利用卧式涂覆机一次性完成较大厚度的胶层涂覆，而且厚度均匀，不会产生表观流挂所致的厚度不均，从而影响由其制备得到的覆铜板的性能。In the present invention, a large thickness of adhesive layer coating can be completed at one time by using a horizontal coating machine, and the thickness is uniform, and there will be no uneven thickness caused by apparent sag, which will affect the copper clad laminate prepared by it. performance.
优选地，步骤(3)所述涂覆的厚度为10-300μm，例如10μm、13μm、15μm、20μm、30μm、40μm、50μm、60μm、80μm、100μm、120μm、150μm、180μm、200μm、220μm、240μm、260μm、280μm或300μm，优选30-300μm，进一步优选60-300μm。Preferably, the coating thickness in step (3) is 10-300 μm, such as 10 μm, 13 μm, 15 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 80 μm, 100 μm, 120 μm, 150 μm, 180 μm, 200 μm, 220 μm, 240 μm , 260 μm, 280 μm or 300 μm, preferably 30-300 μm, more preferably 60-300 μm.
在本发明中根据需要可以使得玻纤布两面涂覆的PTFE胶液的厚度相同或不同，优选地，步骤(2)和步骤(3)所述涂覆的厚度相同，可以利用卧式涂覆机大大减小两面的胶层厚度偏差，提高由其制备的覆铜板的性能。In the present invention, the thickness of the PTFE glue solution coated on both sides of the glass fiber cloth can be made the same or different as required, preferably, the thickness of the coating described in step (2) and step (3) is the same, and horizontal coating can be utilized The machine greatly reduces the thickness deviation of the adhesive layer on both sides and improves the performance of the copper clad laminate prepared by it.
每次涂胶所得PTFE漆布厚度比立式上胶机可增加50μm-300μm，覆铜板生产效率提升、覆铜板性能提高。The thickness of PTFE varnished cloth obtained by each gluing can be increased by 50μm-300μm compared with the vertical gluing machine, the production efficiency of copper clad laminates is improved, and the performance of copper clad laminates is improved.
优选地，步骤(2)和步骤(3)所述干燥为100～150℃，例如100℃、105℃、110℃、115℃、120℃、125℃、130℃、135℃、140℃、145℃或150℃。Preferably, the drying in step (2) and step (3) is 100-150°C, such as 100°C, 105°C, 110°C, 115°C, 120°C, 125°C, 130°C, 135°C, 140°C, 145°C °C or 150 °C.
优选地，步骤(2)和步骤(3)所述烧结的温度为360～380℃，例如360℃、365℃、368℃、370℃、375℃、378℃或380℃。Preferably, the sintering temperature in step (2) and step (3) is 360-380°C, such as 360°C, 365°C, 368°C, 370°C, 375°C, 378°C or 380°C.
PTFE胶液包含PTFE悬浮液或分散液；还可以包含填料。PTFE gels contain PTFE suspensions or dispersions; fillers may also be included.
优选地，步骤(2)和步骤(3)所述PTFE胶液还包含无机填料。Preferably, the PTFE glue solution described in step (2) and step (3) also contains inorganic fillers.
优选地，所述无机填料包括二氧化硅、氧化铝、氮化铝、氮化硼、二氧化钛、钛酸钡、硫酸钡、滑石粉、氢氧化铝、立德粉、碳酸钙、硅灰石、高岭土、水镁石、硅藻土、膨润土、硅微粉或浮石粉中的任意一种或至少两种的混合物。Preferably, the inorganic fillers include silica, alumina, aluminum nitride, boron nitride, titanium dioxide, barium titanate, barium sulfate, talcum powder, aluminum hydroxide, lithopone, calcium carbonate, wollastonite, Any one or a mixture of at least two of kaolin, brucite, diatomite, bentonite, silica micropowder or pumice powder.
在本发明中，用于玻纤布涂覆的所述卧式涂覆机主要有两种基本结构，两种结构的共同点是玻璃布在水平牵引力的作用下与辊轴③贴合，通过调整辊轴②与玻纤布的间距控制涂层的厚度。In the present invention, the horizontal coating machine used for glass fiber cloth coating mainly has two basic structures. The common point of the two structures is that the glass cloth is attached to the roller shaft ③ under the action of the horizontal traction force. Adjust the distance between the roller shaft ② and the glass fiber cloth to control the thickness of the coating.
图1所示的卧式涂覆机，辊轴③以顺时针方向转动，可以提供玻纤布水平牵引力，使玻纤布沿着⑥所示箭头方向水平运动，把胶水存放区域④中胶槽①中的胶水带到玻纤布上，经过辊轴②，得到一定PTFE树脂层厚度的单面漆布，通过调整辊轴②与玻纤布的间距控制涂层的厚度，并且在玻纤布通过烘箱区域⑤进行干燥、烧结。In the horizontal coating machine shown in Figure 1, the roller shaft ③ rotates in a clockwise direction, which can provide the horizontal traction force of the glass fiber cloth, so that the glass fiber cloth moves horizontally in the direction of the arrow shown in ⑥, and put the glue storage area ④ in the glue tank The glue in ① is brought to the glass fiber cloth, and through the roller shaft ②, a single-sided paint cloth with a certain thickness of PTFE resin layer is obtained. The thickness of the coating is controlled by adjusting the distance between the roller shaft ② and the glass fiber cloth, and passed through the glass fiber cloth. Drying and sintering are carried out in the oven area ⑤.
图2所示的卧式涂覆机，辊轴③以顺时针方向转动，可以提供玻纤布水平牵引力，使玻纤布沿着⑥所示箭头方向水平运动，通过含涂头或喷淋头的胶槽①把胶水涂覆或喷淋在玻璃布上(⑦表示胶水涂覆或喷淋在玻璃布上的位置)，经过辊轴②，同样得到一定PTFE树脂层厚度的单面漆布，同样通过调整辊轴②与玻纤布的间距控制涂层的厚度，并且在玻纤布通过烘箱区域⑤进行干燥、烧结。In the horizontal coating machine shown in Figure 2, the roller shaft ③ rotates in a clockwise direction, which can provide the horizontal traction force of the glass fiber cloth, so that the glass fiber cloth moves horizontally along the direction of the arrow shown in ⑥, and passes through the coating head or spray head. The glue tank ① coats or sprays the glue on the glass cloth (⑦ indicates the position where the glue is coated or sprayed on the glass cloth), and passes through the roller ② to obtain a single-sided lacquer cloth with a certain thickness of the PTFE resin layer. The thickness of the coating is controlled by adjusting the distance between the roller shaft ② and the glass fiber cloth, and drying and sintering are carried out in the area where the glass fiber cloth passes through the oven ⑤.
在本发明所述的两种卧式涂覆机结构中，在得到单面漆布后，再对另一面进行相同涂覆操作，可以得到两面均匀厚度的PTFE漆布。In the two kinds of horizontal coating machine structures described in the present invention, after the one-sided varnished cloth is obtained, the same coating operation is performed on the other side to obtain PTFE varnished cloth with uniform thickness on both sides.
另一方面，本发明提供由如上所述的制备方法制备得到的PTFE漆布。In another aspect, the present invention provides the PTFE varnished cloth prepared by the above-mentioned preparation method.
另一方面，本发明提供一种覆金属箔层压板，所述覆金属箔层压板包括漆布层和压覆在所述漆布层上的金属箔，所述漆布层包括至少一层如上所述的PTFE漆布。In another aspect, the present invention provides a metal foil-clad laminate, the metal-clad laminate comprising a varnished cloth layer and a metal foil laminated on the varnished cloth layer, the varnished cloth layer comprising at least one layer as described above PTFE Linoleum.
优选地，所述金属箔为铜箔。Preferably, the metal foil is copper foil.
相对于现有技术，本发明具有以下有益效果：Compared with the prior art, the present invention has the following beneficial effects:
本发明通过对玻纤布进行预处理后，可以利用卧式涂覆机对玻纤布涂覆PTFE胶液来制备PTFE漆布，可以减少涂胶次数，仅需要两面各进行一次水平涂覆即可得到所需厚度的漆布，增加上胶的胶层厚度，而且厚度均匀，不会产生表观流挂所致的厚度不均，提高由其制备得到的覆铜板的性能，提高生产效率。In the present invention, after the glass fiber cloth is pretreated, a horizontal coating machine can be used to coat the glass fiber cloth with PTFE glue to prepare PTFE lacquer cloth, which can reduce the number of times of glue coating, and only needs to be horizontally coated once on both sides. The varnished cloth of the required thickness is obtained, the thickness of the adhesive layer for gluing is increased, and the thickness is uniform, without uneven thickness caused by apparent sagging, the performance of the copper clad laminate prepared therefrom is improved, and the production efficiency is improved.
附图说明Description of drawings
图1为本发明卧式涂覆机的一种结构示意图，其中①为胶槽，②和③为辊轴，④为胶水存放区域，⑤为烘箱区域，⑥表示玻纤布水平运动方向；Fig. 1 is a kind of structural representation of horizontal coating machine of the present invention, wherein ① is glue groove, ② and ③ are roller shaft, ④ is glue storage area, ⑤ is oven area, ⑥ represents the direction of glass fiber cloth horizontal movement;
图2为本发明卧式涂覆机的另一种结构示意图，其中①为含涂头或喷淋头的胶槽，②和③为辊轴，⑦表示胶水涂覆或喷淋在玻璃布上的位置，⑤为烘箱区域，⑥表示玻纤布水平运动方向。Fig. 2 is another kind of schematic diagram of the structure of the horizontal coating machine of the present invention, wherein ① is a glue tank containing a coating head or a spray head, ② and ③ are roller shafts, and ⑦ represents that the glue is coated or sprayed on the glass cloth , ⑤ is the oven area, and ⑥ indicates the horizontal movement direction of the glass fiber cloth.
具体实施方式Detailed ways
下面通过具体实施方式来进一步说明本发明的技术方案。本领域技术人员应该明了，所述实施例仅仅是帮助理解本发明，不应视为对本发明的具体限制，下述实施例示例性的选择1080玻纤布，但本发明不仅限于1080玻纤布，还可以选用106、2116、2313、3313、7628等玻纤布。The technical solutions of the present invention will be further described below through specific embodiments. It should be clear to those skilled in the art that the described embodiment is only to help understand the present invention, and should not be regarded as a specific limitation to the present invention. The following examples select 1080 glass fiber cloth as an example, but the present invention is not limited to 1080 glass fiber cloth , You can also choose 106, 2116, 2313, 3313, 7628 and other glass fiber cloth.
实施例1Example 1
在本实施例中，通过以下方法制备得到PTFE漆布，具体包括以下步骤：In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)利用如图1所示的卧式涂覆机在步骤(1)得到的一次浸胶玻纤布的一面涂覆PTFE胶液，涂覆厚度设置为0.100mm，干燥、烧结，得到一张0.154mm的单面PTFE漆布(含玻纤布)；(2) Utilize the horizontal coating machine as shown in Figure 1 in step (1) one side coating PTFE glue solution of the one-time dipped glass fiber cloth that obtains, coating thickness is set to 0.100mm, drying, sintering, obtains a 0.154mm single-sided PTFE varnished cloth (including glass fiber cloth);
(3)利用如图1所示的卧式涂覆机对步骤(2)得到的PTFE漆布的另一面涂覆PTFE胶液，涂覆厚度设置为0.100mm，干燥、烧结，得到两面涂胶的PTFE漆布，其两面涂覆厚度(含玻纤布)总共为0.254mm。(3) Utilize the horizontal coating machine as shown in Figure 1 to coat the other side of the PTFE tarpaulin that step (2) obtains with PTFE glue solution, and coating thickness is set to 0.100mm, drying, sintering, obtains the two-sided gluing For PTFE varnished cloth, the coating thickness on both sides (including glass fiber cloth) is 0.254mm in total.
实施例2Example 2
在本实施例中，通过以下方法制备得到PTFE漆布，具体包括以下步骤：In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)利用如图1所示的卧式涂覆机在步骤(1)得到的一次浸胶玻纤布的一面涂覆PTFE胶液，涂覆厚度设置为0.2mm，干燥、烧结，得到一张0.254mm的单面PTFE漆布(含玻纤布)；(2) Utilize the horizontal coating machine as shown in Figure 1 in step (1) to obtain one side coating PTFE glue solution of glass fiber cloth dipped in glue, coating thickness is set to 0.2mm, drying, sintering, obtains a 0.254mm single-sided PTFE varnished cloth (including glass fiber cloth);
(3)利用如图1所示的卧式涂覆机对步骤(2)得到的PTFE漆布的另一面涂覆PTFE胶液，涂覆厚度设置为0.2mm，干燥、烧结，得到两面涂胶的PTFE漆布，其两面涂覆厚度(含玻纤布)总共为0.454mm。(3) Utilize the horizontal coating machine as shown in Figure 1 to coat the other side of the PTFE tarpaulin that step (2) obtains with PTFE glue solution, coating thickness is set to 0.2mm, drying, sintering, obtains both sides glued For PTFE varnished cloth, the coating thickness on both sides (including glass fiber cloth) is 0.454mm in total.
实施例3Example 3
在本实施例中，通过以下方法制备得到PTFE漆布，具体包括以下步骤：In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)利用如图1所示的卧式涂覆机在步骤(1)得到的一次浸胶玻纤布的一面涂覆PTFE胶液，涂覆厚度设置为0.05mm，干燥、烧结，得到一张0.0.104mm的单面PTFE漆布(含玻纤布)；(2) Utilize the horizontal coating machine as shown in Figure 1 in step (1) one side coating PTFE glue solution of the one-time dipped glass fiber cloth that obtains, coating thickness is set to 0.05mm, drying, sintering, obtains a 0.0.104mm single-sided PTFE varnished cloth (including glass fiber cloth);
(3)利用如图1所示的卧式涂覆机对步骤(2)得到的PTFE漆布的另一面涂覆PTFE胶液，涂覆厚度设置为0.05mm，干燥、烧结，得到两面涂胶的PTFE漆布，其两面涂覆厚度(含玻纤布)总共为0.154mm。(3) Utilize the horizontal coating machine as shown in Figure 1 to coat the other side of the PTFE tarpaulin that step (2) obtains with PTFE glue solution, and coating thickness is set to 0.05mm, drying, sintering, obtains the two-sided gluing For PTFE varnished cloth, the coating thickness on both sides (including glass fiber cloth) is 0.154mm in total.
实施例4Example 4
在本实施例中，通过以下方法制备得到PTFE漆布，具体包括以下步骤：In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)利用如图1所示的卧式涂覆机在步骤(1)得到的一次浸胶玻纤布的一面涂覆PTFE胶液，涂覆厚度设置为0.3mm，干燥、烧结，得到一张0.354mm的单面PTFE漆布(含玻纤布)；(2) Utilize the horizontal coating machine as shown in Figure 1 in step (1) one side coating PTFE glue solution of the one-time dipped glass fiber cloth that obtains, coating thickness is set to 0.3mm, drying, sintering, obtains a 0.354mm single-sided PTFE varnished cloth (including glass fiber cloth);
(3)利用如图1所示的卧式涂覆机对步骤(2)得到的PTFE漆布的另一面涂覆PTFE胶液，涂覆厚度设置为0.3mm，干燥、烧结，得到两面涂胶的PTFE漆布，其两面涂覆厚度(含玻纤布)总共为0.654mm。(3) Utilize the horizontal coating machine as shown in Figure 1 to coat the other side of the PTFE tarpaulin that step (2) obtains with PTFE glue solution, coating thickness is set to 0.3mm, drying, sintering, obtains both sides glued For PTFE varnished cloth, the coating thickness on both sides (including glass fiber cloth) is 0.654mm in total.
实施例5Example 5
在本实施例中，通过以下方法制备得到PTFE漆布，具体包括以下步骤：In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)利用如图2所示的卧式涂覆机在步骤(1)得到的一次浸胶玻纤布的一面涂覆PTFE胶液，涂覆厚度设置为0.1mm，干燥、烧结，得到一张0.154mm的单面PTFE漆布(含玻纤布)；(2) Utilize the horizontal coating machine as shown in Figure 2 in step (1) to obtain one side coating PTFE glue solution of glass fiber cloth dipped in rubber, coating thickness is set to 0.1mm, drying, sintering, obtains a 0.154mm single-sided PTFE varnished cloth (including glass fiber cloth);
(3)利用如图2所示的卧式涂覆机对步骤(2)得到的PTFE漆布的另一面涂覆PTFE胶液，涂覆厚度设置为0.1mm，干燥、烧结，得到两面涂胶的PTFE漆布，其两面涂覆厚度(含玻纤布)总共为0.254mm。(3) Utilize the horizontal coating machine as shown in Figure 2 to coat the other side of the PTFE tarpaulin that step (2) obtains with PTFE glue solution, coating thickness is set to 0.1mm, drying, sintering, obtain the double-sided gluing For PTFE varnished cloth, the coating thickness on both sides (including glass fiber cloth) is 0.254mm in total.
实施例6Example 6
在本实施例中，通过以下方法制备得到PTFE漆布，具体包括以下步骤：In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)利用如图2所示的卧式涂覆机在步骤(1)得到的一次浸胶玻纤布的一面涂覆PTFE胶液，涂覆厚度设置为0.2mm，干燥、烧结，得到一张0.254mm的单面PTFE漆布(含玻纤布)；(2) Utilize the horizontal coating machine as shown in Figure 2 to coat one side of the glass fiber cloth dipped in step (1) to obtain PTFE glue, and the coating thickness is set to 0.2mm, dried and sintered to obtain a 0.254mm single-sided PTFE varnished cloth (including glass fiber cloth);
(3)利用如图2所示的卧式涂覆机对步骤(2)得到的PTFE漆布的另一面涂覆PTFE胶液，涂覆厚度设置为0.3mm，干燥、烧结，得到两面涂胶的PTFE漆布，其两面涂覆厚度(含玻纤布)总共为0.554mm。(3) Utilize the horizontal coating machine as shown in Figure 2 to coat the other side of the PTFE tarpaulin that step (2) obtains with PTFE glue solution, coating thickness is set to 0.3mm, drying, sintering, obtains the double-sided gluing For PTFE varnished cloth, the coating thickness on both sides (including glass fiber cloth) is 0.554mm in total.
实施例7Example 7
在本实施例中，通过以下方法制备得到PTFE漆布，具体包括以下步骤：In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)利用如图1所示的卧式涂覆机在步骤(1)得到的一次浸胶玻纤布的一面涂覆PTFE胶液，涂覆厚度设置为0.05mm，干燥、烧结，得到一张0.104mm的单面PTFE漆布(含玻纤布)；(2) Utilize the horizontal coating machine as shown in Figure 1 in step (1) one side coating PTFE glue solution of the one-time dipped glass fiber cloth that obtains, coating thickness is set to 0.05mm, drying, sintering, obtains a 0.104mm single-sided PTFE varnished cloth (including glass fiber cloth);
(3)利用如图2所示的卧式涂覆机对步骤(2)得到的PTFE漆布的另一面涂覆PTFE胶液，涂覆厚度设置为0.05mm，干燥、烧结，得到两面涂胶的PTFE漆布，其两面涂覆厚度(含玻纤布)总共为0.154mm。(3) Utilize the horizontal coating machine as shown in Figure 2 to coat the other side of the PTFE tarpaulin that step (2) obtains with PTFE glue solution, coating thickness is set to 0.05mm, drying, sintering, obtain the double-sided gluing For PTFE varnished cloth, the coating thickness on both sides (including glass fiber cloth) is 0.154mm in total.
对比例1Comparative example 1
通过以下方法制备得到PTFE漆布，具体包括以下步骤：Prepare PTFE paint cloth by following method, specifically comprise the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)将步骤(1)得到的一次浸胶玻纤布，采用立式上胶机浸渍PTFE胶液上胶10～15次，得到一张0.254mm的PTFE漆布(含玻纤布厚度)。(2) Use a vertical gluing machine to impregnate the glass fiber cloth impregnated with PTFE glue for 10 to 15 times to obtain a 0.254mm PTFE varnished cloth (including the thickness of the glass fiber cloth).
对比例2Comparative example 2
通过以下方法制备得到PTFE漆布，具体包括以下步骤：Prepare PTFE paint cloth by following method, specifically comprise the following steps:
(1)将1080玻纤布在PTFE胶液中进行一次浸胶，而后烧结，得到一次浸胶玻纤布，该漆布厚度为0.054mm；(1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;
(2)将步骤(1)得到的一次浸胶玻纤布浸渍PTFE胶液，采用立式上胶机，设置上胶机夹轴间隙0.254mm以获得0.254mm的PTFE漆布，结果一次上胶制备得到的PTFE漆布由于表观流挂，使得同一面的厚度不同位置厚度不均，而且两面也很难达到相同厚度的树脂层，使得厚度偏差较大，无法获得0.254mm的PTFE漆布。(2) Immerse the primary dipped glass fiber cloth obtained in step (1) with PTFE glue, use a vertical gluing machine, set the gap between the clamping shafts of the gluing machine to 0.254mm to obtain a PTFE varnished cloth of 0.254mm, and prepare it by gluing once The obtained PTFE varnished cloth has uneven thickness at different positions on the same side due to apparent sagging, and it is also difficult to reach resin layers with the same thickness on both sides, so that the thickness deviation is relatively large, and the PTFE varnished cloth of 0.254mm cannot be obtained.
将实施例1-7和对比例1制备得到的两面涂胶的PTFE漆布通过本领域已知的覆铜板制备方法制备得到PTFE覆铜板。The PTFE lacquer cloth coated with glue on both sides prepared in Examples 1-7 and Comparative Example 1 was prepared by a copper-clad laminate preparation method known in the art to obtain a PTFE copper-clad laminate.
实施例1-7和对比例1制备得到的PTFE覆铜板的性能测试结果如表1所示。The performance test results of the PTFE copper-clad laminates prepared in Examples 1-7 and Comparative Example 1 are shown in Table 1.
表1Table 1
测试标准：standard test:
Dk/Df(10GHz/SPDR)：IPC-TM-650 2.5.5.13；Dk/Df(10GHz/SPDR): IPC-TM-650 2.5.5.13;
Dk/Df(1GHz/平板电容)：IPC-TM-650 2.5.5.9；Dk/Df(1GHz/plate capacitance): IPC-TM-650 2.5.5.9;
Dk/Df(3GHz/SPDR)：IPC-TM-650 2.5.5.13；Dk/Df(3GHz/SPDR): IPC-TM-650 2.5.5.13;
Dk/Df(5GHz/SPDR)：IPC-TM-650 2.5.5.13；Dk/Df(5GHz/SPDR): IPC-TM-650 2.5.5.13;
吸水性(％)：IPC-TM-650 2.6.2.1；Water absorption (%): IPC-TM-650 2.6.2.1;
剥离强度(N/mm)接收态：IPC-TM-650 2.4.8；Peel strength (N/mm) receiving state: IPC-TM-650 2.4.8;
剥离强度(N/mm)热应力后：IPC-TM-650 2.4.8。Peel strength (N/mm) After thermal stress: IPC-TM-650 2.4.8.
对比例1与实施例1相比，生产相同厚度为0.254mm的PTFE漆布，传统方式需要通过立式上胶机浸胶10～20次甚至更多次数，才能得到一张0.0.250mm的PTFE漆布，而采用本发明的卧式涂覆机，加上初次的1080布浸胶，总共只进行的3次涂胶即可得到一张相同厚度、性能相近的PTFE漆布；对比例2采用立式上胶机一次上胶制备得到的PTFE漆布由于表观流挂，使得同一面的厚度不同位置厚度不均，而且两面也很难达到相同厚度的树脂层，使得厚度偏差较大，影响覆铜板性能的稳定，而本发明采用卧式涂覆机，在水平面上受力均匀，不存在表观流挂问题，而且得到的树脂层厚度控制均匀，对于覆铜板的性能稳定性一致性有很大保障。Comparative Example 1 Compared with Example 1, to produce PTFE varnished cloth with the same thickness of 0.254mm, the traditional method needs to dip 10 to 20 times or more times through a vertical gluing machine to obtain a PTFE varnished cloth of 0.0.250mm , while adopting the horizontal coating machine of the present invention, adding the initial 1080 cloth dipping, a total of only 3 times of gluing can obtain a piece of PTFE varnished cloth with the same thickness and similar performance; comparative example 2 adopts vertical upper Due to the apparent sag of the PTFE varnish prepared by one-time gluing of the glue machine, the thickness of the same side is uneven at different positions, and it is difficult to achieve the same thickness of the resin layer on both sides, resulting in a large thickness deviation and affecting the performance of the copper clad laminate. Stable, while the present invention adopts a horizontal coating machine, which is evenly stressed on the horizontal plane, and there is no apparent sagging problem, and the thickness of the obtained resin layer is uniformly controlled, which greatly guarantees the consistency of performance stability of the copper clad laminate.
申请人声明，本发明通过上述实施例来说明本发明的工艺方法，但本发明并不局限于上述工艺步骤，即不意味着本发明必须依赖上述工艺步骤才能实施。所属技术领域的技术人员应该明了，对本发明的任何改进，对本发明所选用原料的等效替换及辅助成分的添加、具体方式的选择等，均落在本发明的保护范围和公开范围之内。The applicant declares that the present invention illustrates the process method of the present invention through the above examples, but the present invention is not limited to the above process steps, that is, it does not mean that the present invention must rely on the above process steps to be implemented. Those skilled in the art should understand that any improvement of the present invention, the equivalent replacement of the selected raw materials in the present invention, the addition of auxiliary components, the selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention.
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