Zipper tape, bag with zipper tape, method for manufacturing bag with zipper tape, long member-bonding method capable of favorably bonding long members, device therefor, and zipper tape-bonding device
US11370064B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2016 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Apr 17, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B61/188
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A light-absorbing layer and a bonding layer are layered on a first side of each of a belt-shaped male base portion integrated with a male portion and a female base portion integrated with a female portion on a side of the male and female base portions opposite the first side. The light-absorbing layer contains a light-absorbing material having a wavelength absorption range from 800 nm to 1200 nm to absorb a laser beam of the range. The bonding layer contains a low-melting-point resin in a form of a metallocene linear low-density polyethylene having a melting point ranging from 60 degrees C. to 120 degrees C. When the zipper tape is bonded to the base film, the laser beam is applied to heat the light-absorbing layer to melt the bonding layer. The melted bonding layer is pressure-bonded to the base film. The base film can be bonded without causing thermal degradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.