PET Strapping Process Control: Dimensions, Weight per Meter and Consistency

Define consistency in terms you can accept

Consistency is easier to review when the order defines what will be checked. Agree the grade, nominal dimensions, tolerances, declared weight per meter and required mechanical properties. Add the relevant equipment and package conditions. The goal is a repeatable acceptance decision for the proposed application.

A nominal dimension is a product description, not a complete acceptance plan. State which readings will be recorded, how samples are identified and what happens when a result falls outside the agreed limit. Keep the written specification available to both the supplier and the receiving team.

Keep dimensions and g/m in the same record

Ask for width, thickness and weight per meter together. Identify the sample and measurement method so later records can be compared with the approved trial. Record the actual result alongside the declared value rather than only writing “pass”.

For length planning, use a clear mass basis: meters = strap material mass in grams ÷ measured g/m. Packaging and core mass should be excluded when the calculation is intended to describe strap material alone. For example, 20 kg of strap material contains 20,000 g; the resulting length depends on the measured weight per meter of that grade.

The Eco comparison lets buyers explore a calculated lower-g/m scenario. Use a confirmed specification and your own acceptance criteria for an actual purchasing decision.

Keep the manufacturing context separate from the test result

Reimotec technology is part of Newton’s production approach. SIMA’s public technology description covers extrusion, stretching and winding; installed Reimotec plant support is now described by SIMA Germany. These references explain the technology background. They do not replace a Newton grade datasheet or your application approval.

When reviewing supplier records, distinguish the product being measured, the test conditions and the acceptance limit. A line capability describes equipment. A sample result describes the tested sample. Neither should be silently used as a guarantee for every future grade or delivery.

Test the strap as part of the package

Review feed behaviour, tensioning and the joint on the intended equipment. Use representative packages and record the permitted settings. Note failed feeds, incomplete joints, package damage and rework with the sample identifier and operating conditions.

Do not accept a supply change from a visual inspection alone when the application requires performance evidence. Agree the relevant tests and handling review with the packaging team. Preserve the current accepted configuration as a control so the proposed grade can be compared fairly.

Make repeat orders traceable

Retain the quotation, approved grade specification, sample results and equipment setup in one record. Link deliveries to the agreed grade and the supplier’s batch identifier. If the strap or equipment changes, decide whether a new trial is needed before routine production use.

For enquiries, send Newton your current specification, machine model, package description and acceptance criteria. We can discuss the information needed for the proposed grade and a practical sample review. Read the production-process guide for the broader technology context.