Industrial wrapping machines split into five operating classes — stretch, shrink, wrap-around sleeve, banding, and overwrapping — distinguished by film handling, sealing mechanism, and bundle geometry [S2][S6].
Spec sheets consistently report output in cycles/min, film width in mm, and machine footprint in mm; a typical high-speed bottle shrink wrapper runs 25 cycles/min at 1,700 × 1,200 × 1,700 mm and 1,000 kg [S3].
Stretch Wrappers: Film Pre-Stretch and Pallet Load Geometry
Stretch wrappers apply PE/PE-blend film under controlled pre-stretch (typically 100–300%) to palletised loads, using a rotating turntable or orbital ring to wrap the load without heat [S2]. The CAM ASB 38 uses an electromechanical stretching system that holds band tension constant independent of reel diameter, reducing changeover time by allowing a single reel format [S2]. Stretch wrapping suits unitised pallet loads where breathability and load retention matter more than tamper evidence.
Limitations: stretch film offers no hermetic seal, no UV barrier beyond what the additive package provides, and poor performance on irregular geometries. For shrink-grade finishes, a heat tunnel is required, which moves the machine into the shrink class.
Shrink Wrapping Machines: Heat Tunnel, Film Gauge, and Output Cycles
Shrink wrappers form a loose sleeve around a collation, then pass it through a heat tunnel where PE film at 40–60 µm shrinks to conform to the bundle [S3]. The ECM ECMB-40 runs PE film 40–60 µm thick, width 55–315 mm, on a roll up to 300 mm diameter, and outputs 25 cycles/min maximum depending on bottle size and bundle count [S3].
The CAM ASB 38 covers a second shrink sub-mode — sleeve wrapping with shrinkable film — by adding the heat-shrinking tunnel TRM38 downstream of the wrapping station [S2]. Shrink wrapping suits bottles, cartons, trays, and bundled consumer goods where a tight, printed, tamper-evident finish is required; failure modes include dog-ears at corners, burn-through at film thin spots, and tunnel jams when collations are inconsistent.
Wrap-Around Case Packers: Sleeve Format and RSC Carton Integration
Wrap-around machines feed a flat blanks stack, wrap the blank around a product collation, and glue the side seam to form a Regular Slotted Container (RSC) inline, then discharge the finished case [S1]. The B&B-MAF wallpaper packaging machine combines a stretch packer with a Kartomat case packer and stacking system, delivering film-wrapped wallpaper rolls directly into RSC cartons in one continuous line [S1].
This class targets cylindrical or rectangular collations that need a fully enclosed corrugated case — typically end-of-line after primary packing. Wrap-around case packers are distinct from wrapping machines in the generic stretch/shrink sense because the primary package is a glued corrugated case, not just a film sleeve.
Banding and Overwrapping: Narrow Film, Pharma/Cosmetic Finishes
Banding machines apply a single narrow strip of film (LDPE or printed band) around a collation, sealing with a heated bar and film-brake unit for a uniform seal without full enclosure [S2]. The ASB 38's single sealing position, repeated on each bundle, is the design pattern most banding OEMs copy because it cuts film use to a single band versus a full sleeve [S2].
Overwrappers (also called horizontal or vertical overwrap machines) wrap a single product or grouped bundle in a single layer of film or paper with a folded closure — dot, ribbon, or standard envelope fold — and are standard in pharmaceutical and cosmetic secondary packaging [S6]. Marchesini's range covers bundles, ampoules, auto-injectable pens, blister packs, bottles, cartridges, diagnostic kits, inhalers, jars, and ophthalmic products, with rates reaching multiple bundles/min depending on format [S6]. Overwrapping suits retail-pharma where a printed paper or film overwrap is part of the brand finish.
Selection Criteria: Film, Throughput, Geometry, and Line Fit
Four decision criteria separate the five classes: (1) primary package type — film-only versus film + corrugated case; (2) sealing energy — none for stretch, heated bar for band/overwrap, heated tunnel for shrink; (3) throughput in cycles or bundles/min; (4) product geometry stability going into the wrapper. [S1]
Concrete comparison: stretch wrappers handle pallet loads with no heat and no hermetic seal; shrink wrappers output up to 25 cycles/min on 40–60 µm PE film at 55–315 mm width [S3]; banding uses a single film strip with one heated seal; wrap-around case packers add a glued RSC carton to the film sleeve for fully enclosed shipping cases [S1]; overwrappers handle pharma/cosmetic retail formats with folded closures at multi-bundle/min rates [S6].
For Whom Each Class Fits — and Where It Fails
Shrink wrapping fits bottling lines, dairy, and personal care where 25 cycles/min and tight bundle conformity justify a heat tunnel [S3]. Stretch wrapping fits palletising, warehouse, and distribution centres with breathable film and no tunnel energy cost. Wrap-around case packers fit end-of-line integration where RSC cartons are mandatory for retail-ready shelf shipping [S1]. Banding fits low-film-cost collation of cans, cartons, and trays where a tamper band is sufficient.
Where the classes fail: shrink wrappers cannot replace corrugated cases for heavy shipping; stretch film cannot provide tamper evidence; banding cannot replace a full sleeve where product protection from dust or moisture matters; overwrappers are over-specified and over-priced for industrial pallet loads. The shrink-wrapping machine class is also distinct from a cutting machine or a filling machine, even though all three share conveyor integration in a typical packaging line.
Standards, Sourcing Signals, and 2026 Vendor Mix
Manufacturer directories updated 2026-07-18 and 2026-07-20 list Chinese OEMs — Joinpack Machines and Foshan Shunde Kangbeili Woodworking Machinery — as active exporters of stretch, shrink, and PUR wrapping machines, with Kangbeili holding ISO 9001 and ISO 14001 certification [S4][S5]. Ruian Huadong Packing Machinery, established 1996-07-05 with 53 employees, lists automatic small-bottle group pack POF shrink wrap machines at FOB US $6,000–8,000 per set as a benchmark price band for entry-level Asian-built shrink wrappers [S8].
European OEMs remain concentrated in pharmaceutical overwrapping (Marchesini, Italy) and specialty wrap-around (B&B-MAF, Germany; SMI ERGON Series, PLC-controlled servo-driven) [S1][S6]. A trackable next node: any 2026 Q3 release of an integrated stretch-banding-sleeve combination machine from a major European OEM, which would compress the current 3–4 machine classes into a single platform.
This topic is covered further in Degassing & Refining Unit Types: Classification, Spec Ranges, and Selection Boundaries.