Supported standards

List of standards supported by Innoform

Details of the selected standard

Standard type:	GKV
Name:	GKV Blatt I- IV
Designation:	Prüf- und Bewertungsklausel für Polyethylen-Folien und Erzeugnisse daraus (3. Schweißnahtgüte)
Akkreditiert:	nein

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Tests of this standard

Sealing and welding properties of films, verification and comparison by laboratory sealing press
Production of sealing or welding seams on our laboratory sealing press (Kopp) and testing of the sealing seams with the Zwick tensile testing machine. The seals are made using previously agreed parameters. To create sealing curves individual parameters are varied, e.g. for determining the dependence of the sealing properties on the sealing temperature Ts [° C]. Of course, sealing curves can also determined depending on sealing pressure ps [N/cm] or sealing time ts [s]. Typically, a parameter is varied over 5 equal levels and the results are plotted graphically as a function of the variables (accredited test).

Seal seam quality of PE- pouches or sacks (temperature range -40 to +120 °C)
You send us in pouches, sacks or sealings made of polyethylene film. We determine the seal strength quality in [%] relative to film strength, according GKV-test and evaluation clause Leaf III or DIN 55543-3 per seal (e.g. bottom seam) n = 10 individual measurements to lot size 5000 pieces, additional measurements for larger lots optional. The strength of unsealed flim is measured and set in relation to the strength of the seal tested under identical conditions.

Dimensions and repeating patterns on pouches, bags etc.
Dimensions like width, length, side gusset depth on bags, reels, packagings, repeat measurements, with calibrated metal measuring stick n = 5

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Contact person

Heike Schwertke

+49 441 94986-14

heike.schwertke@innoform.de