Method for preparing automatic temperature control light conveyor belt

{
  "publication_number": "US12146252B2",
  "country": "US",
  "kind": "B2",
  "title": "Method for preparing automatic temperature control light conveyor belt",
  "abstract": "Disclosed is a method for preparing an automatic temperature control light conveyor belt, including: drying and setting a polyester fabric, to obtain a pretreated polyester fabric; blending microcapsules and TPU, and granulating, to obtain a modified TPU; coating a glue onto a surface of the pretreated polyester fabric, to obtain a coated polyester fabric; and calendering the modified TPU onto a surface of the coated polyester fabric, to obtain the automatic temperature control light conveyor belt.",
  "claims": [
    "1. A method for preparing an automatic temperature control light conveyor belt, the method comprising: drying and setting a polyester fabric, to obtain a pretreated polyester fabric; blending microcapsules and TPU, and granulating, to obtain a modified TPU; coating a glue onto a surface of the pretreated polyester fabric, to obtain a coated polyester fabric; and calendering the modified TPU onto a surface of the coated polyester fabric, to obtain the automatic temperature control light conveyor belt, wherein each microcapsule comprises a shell and an inner core formed of a phase change material that is one or more selected from the group consisting of N,N-dimethyldodecylamine-N-oxide, N,N-dimethyldodecylamine, 1,12- diaminododecane, N,N-dimethyldodecan-1-amine oxide, hydroquinone bis(2-hydroxyethyl) ether, and hexamidine diisethionate, and the microcapsules are used in an amount of 2.5% by mass, based on a total mass of the microcapsules and TPU.",
    "2. The method of claim 1, wherein drying and shaping the polyester fabric is performed by far-infrared heating.",
    "3. The method of claim 2, wherein the drying and setting is performed at a temperature of 180-200° C.",
    "4. The method of claim 1, wherein the microcapsules and TPU are blended, and added to a twin-screw extruder with a temperature of 160-180° C., and an output of 2 kg/h.",
    "5. The method of claim 1, wherein the glue comprises a PU glue.",
    "6. The method of claim 5, wherein the PU glue is coated onto an upper surface of the pretreated polyester fabric, and dried at a temperature of 150° C.",
    "7. The method of claim 1, wherein the modified TPU is calendered onto an upper surface of the coated polyester fabric under a temperature of 200-210° C., and a film thickness of 0.3 mm.",
    "8. The method of claim 7, wherein during the calendering process, the surface of the coated polyester fabric is maintained at a temperature of 130-150° C.",
    "9. The method of claim 1, wherein the drying and setting, the coating, and the calendaring are carried out successively.",
    "10. The method of claim 9, wherein the blending is carried out before the calendering.",
    "11. The method of claim 1, wherein the shell is made of melamine.",
    "12. The method of claim 11, wherein each microcapsule is formed by encapsulating an outside of the inner core with the shell.",
    "13. The method of claim 12, wherein the phase change material undergoes a phase change from liquid to gas at a temperature of 90-110° C., absorbing external heat.",
    "14. The method of claim 13, wherein the phase change material undergoes a phase change from gas to liquid at a temperature of 30-50° C., releasing the absorbed heat.",
    "15. The method of claim 11, wherein the microcapsules have a size of 100-120 microns and the shell has a thickness of 20-30 microns."
  ],
  "description_excerpt": "The present disclosure relates to the technical field of conveyor belts in the food industry, in particular to a method for preparing an automatic temperature control light conveyor belt.\n\nConveyor belt is widely used in the food processing industry. For example, polyurethane (PU) light conveyor belt generally with a polyester fabric as a skeleton material is mainly used to transport light-weight and medium-weight objects. The PU light conveyor belt is widely used in food baking industries due to its light weight, long life, easy installation, and resistance to friction. However, baked goods generally have a certain temperature after they leave the oven, and the conventional PU conveyor belt has poor temperature resistance, which lead to the accelerated aging of the conveyor belt when transporting objects with high temperature, causing the PU and polyurethane skeleton to separate and crack, which has an adverse effect on the use of the conveyor belt. Further, PU has a low heat capacity, which limits the temperature resistance of PU.\n\nIn the prior art, according to conventional methods, a temperature-resistant glue is used instead of the conventional PU glue as a bonding material between PU and polyester fabrics. However, even if the temperature-resistant glue is used, it would undergo aging and degradation during use, which cannot fundamentally improve temperature-resistant performance of the conveyor belt.",
  "cpc": [
    "D06C 15/00",
    "B29D 29/06",
    "B65G 15/32",
    "B65G 15/34",
    "D06N 2205/08",
    "D06N 2205/20",
    "D06N 2209/06",
    "D06N 2211/04",
    "D06N 3/0036",
    "D06N 3/0059",
    "D06N 3/0068",
    "D06N 3/0077",
    "D06N 3/0081",
    "D06N 3/14",
    "D06N 3/145",
    "D06N 7/00"
  ],
  "ipc": [
    "B65G 15/34",
    "D06C 15/00",
    "D06N 3/00",
    "D06N 7/00"
  ],
  "assignees": [
    "SHANGHAI YONGLI TRANSPORTATION SYSTEM CO Ltd"
  ],
  "inventors": [
    "Bing Fan"
  ],
  "filing_date": "2021-10-19",
  "publication_date": "2024-11-19",
  "grant_date": "2024-11-19",
  "priority_date": "2020-10-20",
  "application_number": "US-202117504592-A",
  "family_id": "74695722",
  "cited_by_count": 0,
  "citations": [
    "US20160059604A1",
    "US20160305063A1",
    "CN105111588B",
    "US20170165627A1",
    "US20180215983A1",
    "CN107815089A"
  ]
}