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CN-122013524-A - Sizing agent for low-dielectric fiber cloth and preparation method and application thereof

CN122013524ACN 122013524 ACN122013524 ACN 122013524ACN-122013524-A

Abstract

The invention belongs to the technical field of electronic cloth, and particularly relates to a slurry for low-dielectric fiber cloth, and a preparation method and application thereof. The slurry for the low dielectric fiber cloth comprises, by mass, 3.0-4.0% of a vinyl alcohol polymer, 1.0-2.0% of an ethylene oxide polymer, 0.1-0.3% of a lubricant, 0.1-0.3% of a dispersing agent, 0.1-0.3% of an antistatic agent, 0.1-0.2% of a coupling agent and the balance of pure water. The invention provides a slurry for low-dielectric fiber cloth, which adopts a low-polarity auxiliary agent system to improve the wear resistance of a slurry film and the stability of the slurry system and reduce fiber hairiness, and the prepared electronic cloth has good fiber dispersibility and strong binding force with resin after high-temperature desizing, meets the use requirement of a high-speed PCB, and can improve the reliability and CAF resistance of the electronic cloth under severe environment.

Inventors

  • LI CHONG
  • LIU DONGFENG
  • LI ZHOU
  • KANG FENGNAN
  • LIU SHUO

Assignees

  • 泰山玻璃纤维邹城有限公司

Dates

Publication Date
20260512
Application Date
20260317

Claims (9)

  1. 1. The sizing agent for the low dielectric fiber cloth is characterized by comprising, by mass, 3.0-4.0% of a vinyl alcohol polymer, 1.0-2.0% of an ethylene oxide polymer, 0.1-0.3% of a lubricant, 0.1-0.3% of a dispersing agent, 0.1-0.3% of an antistatic agent, 0.1-0.2% of a coupling agent and the balance of pure water; The lubricant is a fatty acid ester compound, the dispersing agent is a polyether dispersing agent, the antistatic agent is a polyoxyethylene amine compound, and the coupling agent is an organic carboxylic acid polymer.
  2. 2. The slurry for low dielectric fiber cloth according to claim 1, wherein the vinyl alcohol polymer is polyvinyl alcohol, the polymerization degree is 1700 to 2400, and the alcoholysis degree is 80 to 99%.
  3. 3. The slurry for low dielectric fiber cloth according to claim 1, wherein the ethylene oxide polymer is polyethylene glycol having a number average molecular weight of 2000 to 6000g/mol.
  4. 4. The paste for low dielectric fiber cloth according to claim 1, wherein the organic carboxylic acid polymer is one or two of a maleic anhydride-acrylic acid copolymer, polymaleic anhydride, and polyacrylic acid.
  5. 5. The slurry for low dielectric fiber cloth according to claim 1, wherein the fatty acid ester compound is one or both of butyl stearate and isopropyl palmitate.
  6. 6. The slurry for low dielectric fiber cloth according to claim 1, wherein the polyether dispersant is one or both of polyethylene glycol ether and polypropylene glycol ether having a number average molecular weight of 1000 to 3000 g/mol.
  7. 7. The slurry for low dielectric fiber cloth according to claim 1, wherein the polyoxyethylene amine compound is one or both of octadecylamine polyoxyethylene ether and cocoamine polyoxyethylene ether.
  8. 8. A method for producing the slurry for low dielectric fiber cloth according to any one of claims 1 to 7, comprising the steps of: (1) Mixing a dispersing agent and an antistatic agent, injecting the mixture into pure water, and uniformly stirring to obtain slurry A; (2) Adding a vinyl alcohol polymer and an ethylene oxide polymer into the slurry A, and uniformly stirring to obtain a slurry B; (3) Adding the lubricant into the slurry B, stirring uniformly until no oil slick exists, then continuously adding the coupling agent, stirring uniformly, supplementing the balance of pure water, and keeping stirring to obtain the slurry for the low-dielectric fiber cloth for later use.
  9. 9. Use of a sizing agent for low dielectric fiber cloth according to any of claims 1 to 7 for warp sizing process in the production of low dielectric fiber cloth.

Description

Sizing agent for low-dielectric fiber cloth and preparation method and application thereof Technical Field The invention belongs to the technical field of electronic cloth, and particularly relates to a slurry for low-dielectric fiber cloth, and a preparation method and application thereof. Background At present, the traditional sizing agent in the electronic cloth industry mostly uses polyvinyl alcohol and polyethylene glycol as core double components, and can meet the basic weaving requirement of the traditional E glass fiber. With the rapid development of the fields of AI, high-frequency communication, radar and the like, the market demand for low-dielectric fiber cloth grows exponentially, and low-dielectric special electronic fibers are generated, so that the low-dielectric special electronic fiber cloth becomes a core material for supporting the upgrade of the high-end electronic information industry, and a brand new requirement is also provided for the performance of matched sizing agent. Compared with the traditional E fiber, the low-dielectric fiber has the inherent defects of low strength and poor flexibility, which directly causes the poor weaving performance, the problem of yarn breakage easily occurs in the weaving process, and the problem is particularly prominent in the warp direction, so that the coating property, bundling property and wear resistance of the sizing agent are far higher than those of the traditional sizing agent, and meanwhile, when the traditional dual-component sizing agent is adapted to the low-dielectric fiber, the problem of higher ash content after desizing can influence the coating effect of the subsequent post-treatment agent and the interfacial bonding force of the fiber and copper-clad plate resin. CN119243477a discloses a sizing agent for electronic grade glass fiber cloth, and its preparation method, product and application, the sizing agent is compounded by water-soluble polyester, polypropylene glycol, combustion improver, lubricant, antistatic agent, defoamer and water, the sizing agent can promote glass fiber cladding property and bundling property, reduce weaving defects, and has excellent desizing property and low ash content characteristics, the spun yarn electronic cloth with 9 microns and below produced by using the sizing agent has low air permeability, good impregnation property, stable warp sizing rate and high warp tensile strength, is suitable for the fields of copper-clad plates and printed circuit boards, can effectively solve the problems of poor wear resistance, difficult desizing and the like of traditional sizing agent, but the lubricant has the defects of strong hydrophobicity, difficult desizing and easy residue, and is easy to layer with a film forming system composed of water-soluble polyester and polypropylene glycol. CN121021011a discloses a high-temperature starch impregnating compound for electronic grade glass fiber yarns, a preparation method and application thereof, the impregnating compound comprises a compound starch composite emulsifying agent, a lubricant, a plasticizer, a siloxane functional auxiliary agent A, AFCONA-7319 and water, wherein the compound starch is a mixture of esterified starch, etherified starch and network type quaternary ammonium type cationic starch, the compound emulsifying agent is a mixture of polyethylene glycol laurate, imidazoline ethyl sulfate and fatty amine polyoxyethylene ether, the migration amount of the impregnating compound is low, the breakage rate, hairiness and powder falling amount of the glass fiber yarns can be remarkably reduced, the wear resistance and breaking strength are improved, the impregnating compound is suitable for the preparation of low-expansion electronic grade glass fiber yarns, but a adopted starch system has the problems of insufficient thermal stability, film forming stiffness and poor flexibility, the modified starch compound yarn has high stiffness, is easy to fluff, broken filaments and uneven cloth surfaces at high speed, the chemical compatibility of starch films and PCB matrix resins is poor, the heat resistance binding force is low, and the shearing strength between layers, the reliability and the copper plate can be reduced. Disclosure of Invention In order to overcome the problems in the prior art, the low-dielectric fiber cloth slurry provided by the invention adopts a low-polarity auxiliary agent system, improves the wear resistance of a slurry film and the stability of the slurry system, reduces fiber hairiness, has good fiber dispersibility and strong binding force with resin after high-temperature desizing, meets the use requirements of a high-speed PCB, and can improve the reliability and CAF resistance of the electronic cloth in a severe environment, and the preparation method of the electronic cloth. The slurry for the low-dielectric fiber cloth comprises, by mass, 3.0-4.0% of a vinyl alcohol polymer, 1.0-2.0% of an ethylene oxide polymer, 0.1-0.3% of a