PP woven sacks

The industry baseline: tubular PP woven fabric cut to length, bottom sewn, mouth left open and heat-cut. No film, no liner, at most 1–2 colour flexo printing directly on the fabric.

Processes tape-extrusion · circular-weaving · cut-sew · flexo-print

Same construction as a plain PP sack but woven from HDPE tape instead of PP. Softer hand, better low-temperature impact strength and better resistance to some chemicals, but lower stiffness and more slip on the pallet.

Processes tape-extrusion · circular-weaving · cut-sew · coating

Woven from post-industrial or post-consumer PP regrind, hence the characteristic grey, green or black colour and speckled appearance. Heavy, tear-tolerant, single-trip; the volume product of the domestic Chinese construction and waste trade.

Processes tape-extrusion · circular-weaving · cut-sew · webbing-attach

Very light, very large open sacks used for parcel consolidation, house moves and freight forwarding. Often supplied with a drawstring, a sewn-on webbing handle, or a self-adhesive lip so the courier can seal it without a sewing machine.

Processes tape-extrusion · circular-weaving · cut-sew · flexo-print · webbing-attach

Processes tape-extrusion · circular-weaving · coating · cut-sew · flexo-print

A pre-printed BOPP film — rotogravure reverse-printed in up to 8–10 colours — is laminated onto the woven fabric, giving photographic print quality with the ink sandwiched and protected. This is the premium retail-facing sack.

Processes tape-extrusion · circular-weaving · BOPP-print-laminate · roto-print · cut-sew · heat-seal

Kraft paper laminated to the woven fabric via a PE tie layer. 二合一 is fabric + film; 三合一 is kraft paper + film + fabric. Gives the printability, stiffness and pallet friction of a paper sack with the tear strength of woven PP.

Processes tape-extrusion · circular-weaving · lamination · flexo-print · cut-sew · valve-insert

Processes tape-extrusion · circular-weaving · liner-insert · cut-sew · heat-seal

The PE liner is bonded to the woven fabric during coating or laminating so outer and liner behave as one wall. No liner slip on high-speed fillers, and the sack can be closed in a single sewing or sealing operation.

Processes tape-extrusion · circular-weaving · coating · lamination · liner-insert · ultrasonic-weld · cut-sew

A conventional sewn-bottom woven sack with a valve sleeve inserted in one top corner so it can be filled on a valve packer and self-closes under fill pressure. The economical valve option — no block-bottom machinery needed.

Processes tape-extrusion · circular-weaving · coating · cut-sew · valve-insert · flexo-print

Same welded block bottom as the valve sack but with an open top, closed after filling by heat sealing (or sewing). Used where the product will not flow through a valve spout — coarse granules, flakes, seeds, pellets.

Processes tape-extrusion · circular-weaving · coating · ultrasonic-weld · heat-seal · cut-sew · roto-print

Both ends step-cut and folded over, then bonded — with hot-melt adhesive in the paper-sack tradition, or welded in the PP*STAR construction. Gives a flat, fully closed, tamper-evident and highly printable end without stitching holes.

Processes tape-extrusion · circular-weaving · coating · heat-seal · ultrasonic-weld · roto-print

Tubular fabric with folded side gussets so the filled sack stands square rather than pillowing. Improves pallet stacking, gives extra printable panel area, and is the base construction for most retail rice and pet-food sacks.

Processes tape-extrusion · circular-weaving · cut-sew · BOPP-print-laminate · heat-seal

Made from flat (or slit tubular) fabric folded and seamed down the back rather than from a seamless tube. Lets the factory make any width from one fabric roll and gives a full-bleed printed front panel with the seam hidden at the rear.

Processes tape-extrusion · flat-weaving · circular-weaving · lamination · cut-sew · ultrasonic-weld · heat-seal · roto-print

BOPP-laminated, gusseted, photo-printed consumer sack with a die-cut, punched or webbing handle. Engineered for supermarket shelf presence and for a shopper to carry 5–25 kg.

Processes tape-extrusion · circular-weaving · BOPP-print-laminate · roto-print · cut-sew · heat-seal · webbing-attach · grommet

Processes tape-extrusion · circular-weaving · cut-sew · ultrasonic-weld · flexo-print · heat-transfer

Bags punched with two holes at the lip and threaded onto a wire wicket in blocks, so an automatic bagging machine can strip one bag at a time. The standard supply format for high-speed potato and onion packing lines.

Processes tape-extrusion · circular-weaving · cut-sew · ultrasonic-weld · flexo-print

Open leno-weave PP tubular mesh with paired warp tapes twisted around the weft so the openings cannot slide shut. Breathable, see-through, and the standard for onions, potatoes, garlic, citrus and firewood.

Processes tape-extrusion · circular-weaving · cut-sew · flexo-print

Leno mesh or light woven bag with a drawtape or cord threaded through a hemmed top so it can be closed and reopened by hand without stitching. Sold to end users, not just packers.

Processes tape-extrusion · circular-weaving · cut-sew · webbing-attach · flexo-print

A solid (often BOPP-printed) woven body with a leno mesh or perforated panel inserted so the customer sees the produce and the produce still breathes. The retail compromise between a printed sack and an open mesh bag.

Processes tape-extrusion · circular-weaving · BOPP-print-laminate · cut-sew · ultrasonic-weld · heat-seal · roto-print

Standard solid woven sack with rows of punched macro-vent holes for airflow through a stored or transported crop. Distinct from leno mesh: full fabric strength and printability, controlled ventilation instead of open weave.

Processes tape-extrusion · circular-weaving · cut-sew · flexo-print

UV-stabilised woven sack with a sewn-in tie string, sized so a filled bag can be carried and stacked by hand into a barrier. A commodity with unusually explicit performance specs because governments buy it.

Processes tape-extrusion · circular-weaving · UV-stabilise · cut-sew · flexo-print

Purpose-built sack for hydraulic cement: coated woven PP sized to Chinese national standard GB 9774, engineered for de-aeration during high-speed filling and for pallet stability without slipping.

Typical Per GB 9774-2010 — pasted/block bottom (糊底袋): 50 kg 640±10 × 500±5 mm, 25 kg 480±10 × 390±5 mm; sewn bottom (缝底袋): 50 kg 780±10 × 420±5 mm, 25 kg 560±10 × 350±5 mm. Coated fabric 90–130 g/m²; drop test 1.2 m onto concrete; breakage rate target <1 %; filling 1,800–3,600 bags/hour on rotary packers.

Processes tape-extrusion · circular-weaving · coating · cut-sew · ultrasonic-weld · valve-insert · flexo-print

Heavier-weave, usually UV-stabilised and liner-equipped woven sack sized for the fertiliser trade. Higher GSM than food sacks because granules are abrasive and the bags sit outdoors.

Processes tape-extrusion · circular-weaving · coating · BOPP-print-laminate · liner-insert · UV-stabilise · cut-sew · valve-insert · flexo-print

Printed woven sack for compound feed, usually BOPP-laminated for brand presence and moisture protection, often with a handle because farm staff carry them by hand.

Processes tape-extrusion · circular-weaving · BOPP-print-laminate · roto-print · liner-insert · cut-sew · webbing-attach · heat-seal

Virgin-PP, food-contact-compliant woven sack for milled products, where sift-proofing and freedom from contamination matter more than raw strength. Typically pinch-bottom or lined to eliminate needle holes.

Typical 25 kg: 60–70 × 42–45 cm; 50 kg: 90–95 × 55 cm; fabric 45–80 g/m² (lighter than industrial sacks — the product is not abrasive); virgin PP only, no recycled content, no mineral filler; food-contact declarations to FDA 21 CFR 177.1520 / EU 10/2011; often anti-slip treated for warehouse stacking.

Processes tape-extrusion · circular-weaving · coating · liner-insert · BOPP-print-laminate · cut-sew · heat-seal · flexo-print

Coated, anti-slip, often lined woven sack for polymer pellets and industrial chemicals. Specified around pallet stability, cleanliness and static behaviour rather than around print.

Processes tape-extrusion · circular-weaving · coating · liner-insert · cut-sew · heat-seal · flexo-print

Ventilated woven or leno-mesh bag built for the abrasion and sharp edges of split wood and charcoal, usually with a carrying handle and UV stabilisation for outdoor forecourt display.

Processes tape-extrusion · circular-weaving · UV-stabilise · cut-sew · webbing-attach · flexo-print · BOPP-print-laminate

Very heavy woven sack or sleeve used to wrap a mechanically compressed bale — cotton, wool, textile waste, recycled fibre, hay. Sized to the baling press, not to a fill weight.

Processes tape-extrusion · circular-weaving · UV-stabilise · cut-sew · flexo-print

Woven plastic bag performance-tested and certified under the UN Recommendations on the Transport of Dangerous Goods for solid hazardous materials. Physically similar to an industrial sack, but the certification, the marking and the paper trail are the product.

Processes tape-extrusion · circular-weaving · coating · liner-insert · cut-sew · heat-seal · flexo-print

Sack whose outer surface is treated so filled bags do not slide off each other on a pallet or a truck bed — via anti-slip lacquer dots, anti-slip masterbatch in the coating, or embossed fabric.

Processes tape-extrusion · circular-weaving · coating · cut-sew

Coated woven sack pierced with thousands of micro-holes so entrained air escapes during high-speed powder filling without the powder escaping. Distinct from macro-vented produce sacks — the holes are invisible to the eye.

Processes tape-extrusion · circular-weaving · coating · cut-sew · valve-insert

Woven sack (usually with a dissipative or carbon-loaded liner, sometimes with conductive tapes in the weave) that bleeds off the static charge generated when powders and pellets pour, in flammable-atmosphere areas.

Typical Surface resistivity typically 10⁸–10¹² Ω/sq for dissipative, <10⁵ Ω/sq for conductive; antistatic masterbatch dosed 2–5 %, or carbon-black stripes; tested to IEC 61340-4-4 principles. Note antistatic additives are humidity-dependent — permanent (carbon) versions are not.

Processes tape-extrusion · circular-weaving · coating · liner-insert · cut-sew

Woven outer for mechanical strength plus a laminated aluminium-foil or EVOH-containing inner liner for near-total moisture, oxygen and odour barrier. The top of the barrier range below rigid packaging.

Processes tape-extrusion · circular-weaving · liner-insert · lamination · heat-seal · cut-sew · valve-insert

PP woven replacement for the traditional jute coffee sack, usually paired with a multilayer hermetic barrier liner so green beans hold moisture and aroma through a long ocean voyage.

Processes tape-extrusion · circular-weaving · liner-insert · cut-sew · flexo-print · roto-print · heat-seal

Heavier woven bag, usually laminated, fitted with a zipper (and often handles) so it can be opened and closed repeatedly. Sits between a single-trip sack and a reusable tote; sold to consumers and to institutional users.

Processes tape-extrusion · circular-weaving · BOPP-print-laminate · cut-sew · zipper-insert · webbing-attach · grommet

The woven fabric itself sold on the roll rather than converted into sacks. Included here because it comes off exactly the same tape line and circular looms, and because sack customers who own their own cut-and-sew capacity buy fabric, not bags.

Processes tape-extrusion · circular-weaving · flat-weaving · coating · lamination · UV-stabilise · flexo-print