Treatment / color
Corona, print primer and pigment can change RF response. Ask which published figure and which standard were used.
thermoplastic film rf welding
Check whether the quoted item genuinely satisfies thermoplastic film rf welding, or only resembles the request on polymer, thickness and weld method. Plastic Film Sourcing does not run a welding lab and does not certify a dielectric seal.
Same-basis path when RF welding is on the drawing
- Name the polymer — RF welding (high-frequency / dielectric) typically needs a polar thermoplastic. Flexible PVC, some TPU and some PET-G films are commonly discussed. Polyethylene plastic film is usually heat-sealed or impulse-sealed, not RF welded.
- Name the published figure — thickness, dielectric loss if the buyer cited it, and the ASTM or equivalent method used for treatment, color or gauge.
- Name the process window — frequency class the fabricator actually runs, dwell, and whether a barrier layer will block the field.
- Re-quote if the model changes — a PE-for-PVC swap, a thicker gauge, or a different weld bar is a new request.
Gauge
Film thickness / gauge in μm or mil must match the bar the fabricator already qualified. A thicker offer is not a courtesy upgrade.
Recycle ask
PCR content, if requested, stays on the supplier declaration. This desk has no LCA dataset and does not reprint a kg CO2e/kg figure.
Thermoplastic elastomer (TPE / TPU) versus vulcanized rubber is a different family. If the drawing actually wants a rubber sheet, stop and open the rubber-family site instead of forcing an RF-weldable film name onto that part.
What has to be re-checked if the supplier proposes a different model
A neighbouring film name is useful only when the substitution is written down: polymer, gauge, treatment, weld method and the document that belongs to the new line.
Polymer family
PE, PP, PET, PVC, TPU — write the one on the quote.
Weld method
RF / dielectric versus heat, impulse or ultrasonic.
ASTM or equivalent
The method used for thickness, tensile or puncture.
Food-contact file
FDA 21 CFR 177 only if the buyer asked, on the quoted grade.
REACH / RoHS
Supplier statements for the new grade, not a reused plant file.
Lot identity
New, leftover or PCR resin are different goods under the same name.
Checklists you can reuse (text, not file downloads)
This site has no document-library host. The groups below are the same fields the form already accepts.
Polymer, thickness, width, weld method, quantity, destination. See the request article.
How to send a number back when polymer or weld method is missing. See the reading article.
TDS, dimensional page, and any food-contact or recycled-content file that names the quoted item. Plant ISO 9001 is not a substitute.
Send the RF-welding brief as you have it
If you only have a competitor part number or a photo of a welded bag, say so. A photo is a starting point, not a specification.
Review Specifications