Method for producing resin pellets
US11110629B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2018 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | May 15, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2377/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An object of the present invention is to provide a method for producing resin pellets, in which occurrence of defective pellets is suppressed. The method for producing resin pellets of the present invention includes the following steps, and a strand-shaped resin has a diameter of 1.5 to 4.5 mm, is discharged at a take-off speed of 1.5 m/s to 10 m/s, a die has 10 or more die holes, and a strand interval X defined by Formula 2 satisfies the following Formula 1; step 1: discharging a molten thermoplastic resin through a die in the form of a strand; step 2: cooling the discharged strand-shaped resin using a refrigerant; and step 3: cutting the cooled strand-shaped resin to obtain resin pellets; 1.73×a≤Xb≤2.81×a Formula 1
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.