BOPP Laminated Woven Bag with Block Bottom

Made by Starlinger Ad star machine, bags with Block bottom and valve mouth, either back seamed or tubur construciton. Typical specification is 70GSM scrim+18GSM lamination+18GSM glossy or matt BOPP, and we have different quality level of high-friction for customer’s selection. Up to 9 colors with roto gravour printing. Carton palletized package for full automatic filling process.

 

 

Structural design for block bottom stability

This bag adopts a “block bottom” form that gives it a stable rectangular base. The body is composed of polypropylene woven fabric laminated with BOPP film, combining the strength of pp woven bags with surface protection from bopp packaging. The block bottom aids stacking and load distribution, reducing deformation under filled weight. Because of lamination, the bag also resists moisture intrusion and maintains dimensional stability, which is often required when bopp laminated woven bags carry granular or powdered bulk goods. The reinforced rectangular base helps in automated filling lines and in palletized shipping, making this design preferred among bulk bag suppliers who demand consistency across many units.

 

Materials, printing and finishing options

The laminated composite construction uses virgin polypropylene woven cloth plus BOPP layers. The lamination supports high-fidelity multicolor printing directly on the surface, enabling brands to place logos or instructions without needing external labels. Printing can be applied to the outside BOPP surface. Top and bottom finishing methods vary: the top can be heat cut, cold cut, or hemmed; the bottom is formed into the block shape and sealed by stitching or other sealing methods. Customers can choose gloss or matte BOPP finishes and anti-slip surface treatments to match handling conditions. The finished bopp bag can thus meet both strength and visual branding demands with the structural integrity of a pp woven bag at its core.

 

Manufacturing and packaging workflow

The production runs from weaving to lamination to bag making in a streamlined process to maintain uniform quality. The block bottom design helps simplify the filling process in factories, and bags are typically palletized for transport. This packaging method aligns with automated filling lines to reduce manual handling. Quality checks are performed to ensure fold accuracy, lamination adhesion, and base integrity. For industries handling bulk flows—such as agriculture, chemicals, or raw materials—these pp woven sacks with block bottoms offer an operationally efficient and structurally reliable packaging option.

 

 

 

Product Advantages
 

Load-bearing base structure

The block bottom design ensures the bag stands firmly when filled, distributing weight evenly and reducing stress on seams. Coupled with the pp woven bag core, the structure handles high loads without warping. The bopp laminated bags’ outer layers further protect against wear and tear, extending service life during transport and warehouse stacking. This combination of internal strength and external lamination is especially valued by bulk bag suppliers seeking durability for repeated handling.

 

Surface protection and print clarity

The laminated BOPP layers protect against moisture and dust while presenting a smooth, clean surface for printing. Brands can print clear graphics, batch codes, or regulatory text directly on the bag without extra labels. The bopp packaging finish improves readability and resists abrasion during handling. This capability makes bopp laminated woven bags an excellent choice where aesthetics and traceability matter, as the printed surface endures typical shipping stress better than uncoated woven surfaces.

 

Efficiency in logistics and stacking

These block bottom woven polypropylene bags pack into carton‑pallet units that integrate well with automated systems. The stable base reduces shifting in transit, and the uniform shape improves stacking density. In factories using mechanical filling or bagging lines, the consistent dimensions help reduce jams or misfeeds. For clients managing large volumes, pp woven laminated bag types reduce handling variability and support faster throughput in logistics operations.

 

 

Use Scenarios

Agriculture and seed packaging

Users of seeds, fertilizers or grains require strong, stable bags that protect contents and enable clear branding. The block bottom variant supports stacking in storehouses, and the bopp laminated bags permit direct printing of product information and brand identity. The pp woven sack structure resists tears while the lamination shields contents from moisture during storage and transport.

 

Industrial materials and powders

In sectors such as chemicals, minerals or construction additives, materials often demand rugged packaging. Using block bottom pp woven bags, manufacturers can ensure stability during filling and handling. The lamination protects against leakage or contamination. With printed surfaces, bopp laminated woven bags offer traceability and compliance labeling directly on the bag.

 

Retail bulk and consumer product packaging

For bulk food items, pet feed or grain sold in large retail packs, these bags offer both strength and aesthetic appeal. The stable base helps them sit upright on shelves, and brands can present neat packaging with high-quality printing. The combination of pp woven laminated bag structure and bopp packaging surface supports consumer visibility while maintaining industrial robustness.

 

 

 

About Us

 

UNIPACK is a packaging enterprise founded in 2005 with deep experience in woven plastic solutions. Our operations are based in Jiangsu, with production facilities in Shandong, Anhui, Zhejiang, plus overseas lines in Vietnam and Cambodia.

 

Our specialization includes pp woven bags, bopp laminated woven bags, block bottom structures, and related packaging for sectors such as agriculture, chemicals, and industrial goods. We control the full production chain—fabric weaving, lamination, printing and bag forming—to maintain consistency and reliability. As one of the professional bopp bags manufacturers, we commit to timely delivery, open communication and stringent inspection to ensure product quality across markets.

 

 

 

FAQ

 

Where are your factories located?
We operate in Shandong, Anhui, Zhejiang in China and also in Vietnam and Cambodia.

 

What is your minimum order quantity?
Typical MOQ is 10,000 pieces for small bags and around 1,000 for large bags.

 

Can you deliver OEM/customized bags?
Yes, customization is available for pp woven bags and bopp laminated bags, including size, finish and printing.

 

What is your typical lead time?
Lead time is about 30 to 60 days depending on bag type and order size.

 

What trade and payment terms do you accept?
We support FOB, CIF and DDP. Payment is usually 30% deposit, balance before shipment.

 

Request your custom bopp laminated bags or pp woven laminated bag quote now and start your bulk packaging order!