Quality Control Department

Bonset packages two ways, vertical (which is the usual manner of shipment.) and horizontal for some of our larger sizes. We have two sizes of paper cores, six inch (153mm) and three inch (76mm) (Bonset recommends the six inch). The wall of the paper core on both sizes is 12mm thick.

For vertical packaging, the roll is wrapped with polyethylene film (0.05mm) with corepads attached to the ends of the roll by inserting plastic plugs into the core. The roll is then wrapped with air bubble wrap film for protection.

For horizontal packaging the roll is wrapped with polyethylene film and set on plastic end boards. The rolls are then strapped to each other and to the pallet. Finally, each pallet is then stretched wrapped prior to shipment.

Bonset labels all products with three different labels. The first label is attached to the side of the roll (production label). The second label is attached to the upper side of the corepad (corepad label). The third is attached inside the outer packaging (roll label). There are also pallet labels and shipping labels which both identify the product and the customer shipping address.

The following illustration shows the method of splicing.

The number of splices is listed on the production label.

If a customer has a special product need, Bonset would take appropriate action after confirming and discussing the issue with the customer.

Due to the nature of heat shrinkable film manufacturing, Bonset uses a statistical sampling method for quality assurance. The Quality Assurance department collects statistically selected samples of at least 5 meters in length. The properties, methods and the frequency of testing are listed below:

FREQUENCY {The listed values are minimums only}
X2 per day
X2 per day
Tensile Strength
X2 per week*
X2 per week*
Tear Strength
X2 per week*
X2 per week*

X2 per week*
UV abs/trans

X2 per week*
before shipment
*Or as required periodically
** All tests are performed on each production line.
X2 per day
Method: 5cm apart along the TD (transverse direction) and MD (machine direction) of the sample recording to 0.001mm.
Slit width
X2 per day
Method: Measure both slit sides at right angles of sample.
Heat shrinkage
X2 per day

Method: Cut test specimens of 100mm X 100mm, immerse the specimens in the water bath at the desired temperature for exactly 10 seconds. Measure the specimens and calculate the shrink percentage using steel ruler.
(All data is verified by Bonset specifications per grade of film. Upon verification the data is presented in a Certificate Of Analysis for customer.)
NOTE: Bonset production operators also perform thickness, haze and shrinkage checks
X4 per day.

Bonset retains between five to ten meters of sample film of each lot number for six months.

Heat shrinkable film is unlike other film substrates. You must take care that the film is stored at or below the temperature suggested to prevent premature shrinkage from occurring. Care must also be taken in storing the film after printing, and in shipping film to co-packers or end-users. Some natural shrink information is provided for you on each specification sheet. This goes for all shrinkable film, but especially SBS (styrene) film, which is more susceptible to natural shrinkage issues.

No. None of Bonset's PVC, PETG or SBS films are Corona treated. Bonset film can be successfully printed without Corona treating. Some general ink adhesion guidelines (dyne level) are provided on the specification sheets for each Bonset film grade. Remember that this ink adhesion information is not based on absolutes, but occasional testing using dyne pens. Many factors affect ink adhesion. If you wish to Corona treat the film, please treat immediately prior to printing.

No, this document and the specifications of individual grades can be revised in the case of product improvement or inconvenience after deliberation and agreement from both the customer and Bonset.

This document and the specifications go into effect upon receipt by the customer.

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