Heavy Duty Press Seal Bags, 75 Micron
Seventy five micron is the gauge you move to when 50 micron stops holding. The extra film thickness resists puncture from sharp edges, carries heavier contents without stressing the seal, and survives the handling that comes with freight, workshops and cold storage. Plastpack manufactures heavy duty press seal bags at our Werrington facility in a stock range running from 50mm x 50mm up to 380mm x 510mm, and to your own specification beyond that.
What the Extra Fifty Per Cent Buys You
Fifty per cent more film sounds incremental. On a working line it is not. Puncture resistance does not rise in a straight line with thickness, so the practical difference between 50 and 75 micron is larger than the numbers suggest, particularly against point loads.
That matters in three specific situations. Sharp edges are the first: cut threads, machined corners, stapled paperwork and glass all concentrate force on a small area of film. Weight is the second, because a heavy load hanging in a bag pulls directly on the closure and the side seams. Repeated handling is the third, since every pick, drop and transfer works the film a little further.
Where none of those apply, the 50 micron press seal bag does the job at a lower cost per unit. Specifying heavier film than the application needs is money spent on nothing.
Where Heavy Duty Press Seal Bags Are Used
Workshops and trades
Fasteners, fittings, cut components and service kits with edges and threads that work through lighter film. Kept sealed and organised on the bench and in the van.
Engineering and machined parts
Machined components, tooling inserts and spares protected against corrosion and contamination between operations.
Freight and dispatch
Items that face a long transport leg, multiple handling points or transfer between vehicles, where a split bag means a lost part.
Food processing at volume
Heavier portions, bulk dry goods and frozen storage where the bag has to hold weight and stay flexible in cold conditions. Specify food contact use when you enquire so the correct film is supplied.
Industrial storage
Longer term containment of components and consumables in conditions where dust, moisture and handling are all working against the bag.
Specifying the Right Bag
Gauge. The question is not how heavy the product is but how it loads the film. A dense, smooth item can sit comfortably in 50 micron, while a light item with a sharp corner will not. Assess weight and edge profile together. Our guide on what thickness you need works through the decision in detail, and our team can specify from a description of what you are packing.
Size. Quoted as opening width by depth, with depth measured from the seal. On heavy duty applications, avoid oversizing. Excess film above a heavy load flaps and works the closure loose in transit. Our stock heavy duty range starts at 50mm x 50mm, so if you need a smaller bag in a heavy gauge it is produced as a custom run.
Identification. If contents need marking with part numbers, batch codes or dates, the write on panel bag carries a matt strip that takes pen or marker. Panels on heavier gauges are available as a custom run.
Branding. Where the bag reaches a customer or a site, printed press seal bags carry up to six colour print on the same run.
Manufactured, Not Resold
Plastpack extrudes its own film, prints it and forms the finished bag under one roof. We hold substantial film stock, which is why lead times on standard specifications stay short and repeat orders dispatch quickly across Australia. If a stock size does not fit your product, we make to measure on size, gauge, seal and print. Minimum order quantity on a custom size is 10,000 units, and samples can be supplied for evaluation before you commit to a production run. Where a job needs a gauge beyond 75 micron, we manufacture that too.
Frequently Asked Questions
What makes a press seal bag heavy duty?
Film thickness. At 75 micron the bag resists puncture and tearing better than standard 50 micron film and holds its seal under heavier loads, which suits hardware, machined parts and freight.
When should I choose 75 micron over 50 micron?
When the contents have weight, sharp edges or a long freight leg ahead of them, or when the bag will be handled repeatedly. For light contents with smooth edges in general storage, 50 micron is usually enough.
What sizes are heavy duty press seal bags available in?
Our stock range runs from 50mm x 50mm up to 380mm x 510mm, all in 75 micron and supplied 1,000 per box. Sizes outside that range are made to order.
Are heavy duty press seal bags suitable for freezer storage?
Polyethylene stays flexible at low temperature rather than turning brittle, and the heavier gauge tolerates cold handling better. Specify frozen storage when you enquire so the correct film is supplied.
Are heavy duty press seal bags food safe?
We manufacture food grade film for food contact applications, made to the relevant Australian food safety requirements. Specify food use when you enquire so the correct film is supplied.
Can I get a write on panel on a heavy duty bag?
Stock write on panel bags are 50 micron. Panels on heavier gauges are produced as a custom run, with a minimum of 10,000 units.
Do you manufacture gauges above 75 micron?
Yes. As the manufacturer we produce to your specification on size, gauge, seal and print. Tell us the application and we will recommend a gauge.
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