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CN-114131518-B - Glass polishing brush, method for glass polishing and use of polytrimethylene terephthalate monofilaments for glass polishing

CN114131518BCN 114131518 BCN114131518 BCN 114131518BCN-114131518-B

Abstract

The invention discloses a glass polishing brush, which comprises a brush body and bristles distributed on the surface of the brush body, wherein the bristles comprise PTT monofilaments, and a method for polishing glass by using the glass polishing brush is also provided, and the glass polishing brush is preferably used in combination with cerium oxide polishing liquid. The invention also discloses the use of PTT monofilaments for glass polishing, the PTT monofilaments having a diameter of 4mil to 30mil. The glass polishing brush provided by the invention realizes effective polishing of the glass surface, obtains a smoother glass surface, and compared with other monofilaments, the PTT monofilaments cannot generate a large number of deep grooves at the chamfer of the glass in the polishing process.

Inventors

  • FU CHENGJIE
  • ZHOU HAOYAN
  • XIA TIANYU

Assignees

  • 杜邦兴达（无锡）单丝有限公司

Dates

Publication Date
20260505
Application Date
20201016
Priority Date
20200904

Claims (20)

  1. 1. A glass polishing brush comprising a brush body and bristles distributed on a surface of the brush body, the bristles comprising polytrimethylene terephthalate (PTT) filaments, wherein the PTT filaments have a diameter of 4 mil to 30 mil.
  2. 2. The glass polishing brush of claim 1, wherein the bristles consist of PTT monofilaments.
  3. 3. The glass polishing brush according to claim 1, wherein the PTT monofilaments have a diameter of 4 to 20 mil.
  4. 4. The glass polishing brush of claim 1, wherein the PTT monofilaments have a diameter of 6 mil-20 mil.
  5. 5. The glass polishing brush of claim 1, wherein the PTT monofilaments have a diameter of 7 mil-14 mil.
  6. 6. The glass polishing brush according to any one of claims 1 to 5, wherein the bristles have a tuft length of 8 to 26 mm.
  7. 7. The glass polishing brush according to any one of claims 1 to 5, wherein the bristles have a tuft length of 12 to 20 mm.
  8. 8. The glass polishing brush according to any one of claims 1 to 5, wherein the bristles have a tuft length of 17.5 mm.
  9. 9. The glass polishing brush of any one of claims 1-5, wherein the cross-sectional shape of the PTT monofilament comprises a circle, oval, rectangle, diamond, triangle, hexagon, or octagon.
  10. 10. The glass polishing brush of claim 9, wherein the cross-sectional shape of the PTT monofilament comprises a circular shape or an oval shape.
  11. 11. The glass polishing brush of any one of claims 1-5, wherein the PTT monofilament is solid or has hollow channels internally extending lengthwise therethrough, the channels being one or more.
  12. 12. The glass polishing brush of any one of claims 1-5, wherein the PTT monofilament comprises 90-100 wt.% PTT and 0-10 wt.% of other resins or additives.
  13. 13. The glass polishing brush of claim 12, wherein the other resin or additive is present in an amount of no more than 5 wt%.
  14. 14. The glass polishing brush of claim 12, wherein the other resin or additive is present in an amount of no more than 2 wt%.
  15. 15. The glass polishing brush of claim 12, wherein the other resin or additive is present in an amount of no more than 1 wt%.
  16. 16. The glass polishing brush of claim 12, wherein the other resin is selected from one or more of polyethylene, ethylene copolymer, polypropylene, co-propylene, polydimethylsiloxane, polymethylphenylsiloxane, polyalkylphenylsiloxane, polytetrafluoroethylene, polylactic acid, polyethylene glycol, polypropylene glycol, polymethyl acrylate, copolymers of polyacrylate, polystyrene copolymers, polyamide, copolyamide, polycarbonate, polyethylene terephthalate-based copolyesters, polybutylene terephthalate-based copolyesters, polyethylene naphthalate, or the additive is selected from one or more of antioxidants, anti-hydrolysis agents, ultraviolet-resistant additives, chain extenders, matting agents, nucleating agents, lubricants, plasticizers, toughening agents, pigments, fillers.
  17. 17. The glass polishing brush of any of claims 1 and 3-5, wherein the bristles comprise PTT monofilaments and one or more materials selected from the group consisting of other monofilaments, animal hair, vegetable fibers, and other materials, wherein the PTT monofilaments are present in an amount of 70 wt.% or more, based on the total weight of the bristles.
  18. 18. The glass polishing brush of claim 17, wherein the PTT monofilament is present in an amount of 80 wt.% or more based on the total weight of the bristles.
  19. 19. The glass polishing brush according to claim 17, wherein the content of the PTT monofilaments is 90% by weight or more based on the total weight of the bristles.
  20. 20. The glass polishing brush of claim 17, wherein the PTT monofilament is present in an amount of 99 wt.% or more based on the total weight of the bristles.

Description

Glass polishing brush, method for glass polishing and use of polytrimethylene terephthalate monofilaments for glass polishing Technical Field The invention relates to the field of glass polishing, in particular to a glass polishing brush, a method for polishing glass by using the brush and application of a polytrimethylene terephthalate monofilament in glass polishing. Background The glass processing industry changes the shape of a glass workpiece through cutting, grinding, hot bending and other processes. Glass workpieces such as cover glass of a mobile phone and back cover glass of a mobile phone. These processes can cause the surface of the glass workpiece to become roughened or deformed. The surface of the glass workpiece must be smoothed and smoothed by a polishing process after these processing processes. Brushes are used for polishing during the polishing process in order to preserve certain delicate structural features, such as edge chamfer and cambered surface configurations. During polishing, a dispersion of polishing particles, typically an aqueous dispersion of cerium oxide particles, is sprayed onto the bristle surfaces of the brush. The brush carrying the dispersion of polishing particles is rotated at a certain speed and brought into contact with the glass work piece, and the glass on the work piece surface is removed by physical and chemical interactions between the polishing particles and the glass to achieve the polishing effect. Polishing brushes generally use animal hair, particularly pig hair, to polish glass workpieces. Although the pig hair brush is very efficient in removing glass, pig hair has some disadvantages. Pig hair is a natural product, and quality fluctuation is very large. In addition, the supply of pig hair is also very unstable due to outbreaks of swine influenza. To address the quality and supply issues of pig hair, the glass processing industry began to use synthetic polymeric monofilaments instead of pig hair. The common synthetic polymer monofilament materials are poly (hexamethylene adipamide) (nylon 66), poly (hexamethylene sebacate) (nylon 610), poly (hexamethylene dodecanoate) (nylon 612), poly (butylene terephthalate) (PBT), and the like. The quality control of these synthetic polymeric monofilaments is better than that of the pig hair, and the supply chain is also more stable than that of the pig hair. However, brushes made of synthetic polymeric monofilaments have a much poorer efficiency in removing glass than pig hair. This results in a polishing process that is otherwise time consuming and requires further elongation to ensure that the surface of the glass workpiece is level and smooth as desired. Extending the polishing process time directly results in reduced efficiency and increased cost in the production of glass workpieces. In view of the above problems in the prior art, the present inventors have made extensive studies and experiments and have unexpectedly found that when a glass work is polished using a brush comprising polytrimethylene terephthalate (hereinafter abbreviated as PTT) monofilaments, a flat and smooth surface can be obtained in a short time, improving the production efficiency of the glass work, and reducing the production cost. Disclosure of Invention The present invention provides a glass polishing brush comprising a brush body and bristles distributed on the surface of the brush body, the bristles comprising, preferably being made of, PTT monofilaments having a diameter of 4mil to 30mil, preferably 4mil to 20mil, still preferably 6mil to 20mil, more preferably 7mil to 14mil, still more preferably 4mil to 10mil, particularly preferably 5mil to 9mil, more particularly preferably 7mil to 8mil, wherein 1mil is equal to 0.0254mm. The present invention provides a method of polishing glass comprising using a glass polishing brush comprising a brush body and bristles distributed on the surface of the brush body, the bristles comprising, preferably made of, PTT monofilaments having a diameter of 4mil to 30mil, preferably 4mil to 20mil, still preferably 6mil to 20mil, still preferably 7mil to 14mil, still more preferably 4mil to 10mil, particularly preferably 5mil to 9mil, still more preferably 7mil to 8mil, and the method of polishing glass of the present invention further preferably uses a combination of the glass polishing brush and a polishing liquid comprising polishing particles, wherein the polishing particles are preferably cerium oxide particles, more preferably cerium oxide particles having an average particle size of 1.0 to 2.3 μm, and the concentration of the cerium oxide polishing liquid is 40 to 150g/L. The present invention provides the use of a PTT monofilament for glass polishing, wherein the PTT monofilament is used as a bristle of a glass polishing brush, and the content of the PTT monofilament is 70% by weight or more, preferably 80% by weight or more, more preferably 90% by weight or more, particularly preferably 99% by wei