Polypropylene Bags

Made from 100 percent virgin PE resin, our polyethylene block-bottom valve bags provide a tough, moisture-resistant solution for packaging fine powders and granular products. Designed for strength, stability and product protection, these bags deliver dependable performance across industries.

Features

• Flat, stable bottom for efficient stacking
• Self-sealing valve for secure closure
• Sift-resistant design with micro-perforated fabric for breathability
• Sanded finish with anti-skid embossing
• Options for sonic seal, tuck-in or internal sleeve
• Film thickness from 4.0 to 7.0 mil
• Customizable with up to 8-color printing
• Compatible with labeling and lot number printing
• Custom film colors for product identification
• Fully recyclable construction

Crafted from virgin low-melt polyethylene resin, these specialized valve bags are designed to be added directly into the manufacturing mix. The bag melts at controlled temperatures, releasing its contents evenly and eliminating the need for manual opening or emptying. This process reduces waste, prevents contamination and minimizes worker exposure to hazardous materials.

Features

• Bag melts and disperses contents uniformly into the mixture
• Prevents product loss and maintains clean operations
• Reduces worker contact with hazardous substances
• Custom-formulated film with melt point between 100°C and 108°C
• Supports consistent batch quality in demanding applications

Applications

• Paint manufacturing
• Rubber production
• Tire manufacturing
• Chemical additives such as Carbon Black and Titanium Dioxide

As the most economical valve design, the standard internal valve is reinforced by gluing a strip of woven polypropylene into the valve opening. This construction adds strength while improving sift resistance, delivering reliable performance at a lower cost.

The tuck-in sleeve is a simple valve design folded and secured by hand after filling. For added convenience in machine packing, an optional thumb notch can be included to speed the process.

A sonic seal sleeve is a poly extension designed for ultrasonic hermetic sealing. Constructed from spunbond polypropylene or polyethylene, it delivers a secure, reliable closure that enhances product protection and package integrity.

Colonial Bag Co. provides a versatile line of polyethylene open mouth bags, available in four construction types to meet diverse packaging requirements. Durable and cost effective, these bags are ideal for dry, flowable products across agriculture, food processing, chemical and building materials industries.

Sideweld, or side-seal, open-mouth bags offer a cost-effective solution for light to medium duty applications. Produced from folded polyethylene sheeting, these bags are sealed along both sides and left open at the top and bottom, to be closed during the packaging process.

Features

• Lip or backflip opening options
• Measured width by height
• Optional bottom gusset for added capacity
• Customizable with handles, punches, hang holes and thumb notches
• Registered or random repeat printing available
• Supplied on rolls or flat packed
• Metalized film options
• Approved materials by FDA

Flat tube, or tubular bottom seal open-mouth bags, are versatile general-purpose bags designed for medium to heavy-duty applications. Constructed from tubular polyethylene film with a sealed base, these bags have no side seams, making them a dependable choice for food, pharmaceuticals, mulch and even hazardous waste.

Features

• Measured width by height for precise sizing
• Options for handles, punches and vent holes
• Registered or random repeat printing
• Available on rolls or flat packed
• Manufactured with FDA-approved materials

Gusseted open-mouth bags are designed with side or bottom folds that expand to increase capacity. When filled, the gusseted sides create a box-like shape that delivers stability and easy stackability, making them ideal for both retail and industrial use.

Features

• Measured W x H x G for precise sizing
• Options for handles, punches and holes
• Line or process printing available
• Suitable for stand-up pouches and retail packaging
• Supplied flat-packed or on rolls
• Manufactured to FDA and USDA specifications

Back seam open-mouth bags are designed for consistent sizing, ensuring smooth performance on automated packaging equipment.

Features

• Constructed from folded polyethylene sheeting
• Overlap seal along the back forms a strong tube
• Available in gusseted and non-gusseted styles

Rollstock and Form Fill Seal (FFS) films are designed for speed and efficiency, streamlining high-volume packaging through automated systems. Pulled directly from a roll and formed around the product, these bags are a trusted choice in construction, petrochemicals and consumer goods.

Features

• Manufactured from 100 percent virgin polyethylene
• Available in vertical FFS, horizontal FFS and tubed rollstock (gusseted or non-gusseted)
• Embossed surface for anti-skid performance
• Custom graphics with up to 10-color printing
• Nano-perforations for controlled air release
• Lacquer finishes for high-gloss presentation
• Optional metalized films for added barrier protection
• Adjustable coefficient of friction for anti-slip control
• Five-layer coextrusion for complex barrier requirements

Protect your products with durable, high quality polyethylene bags. Backed by years of experience and a dedication to customer success, Colonial Bag Co is the partner you can trust for reliable packaging performance.