In the construction materials manufacturing industry, wall putty (filler) is a fine product with high adhesion and is quite sensitive to moisture. If exposed to humid air in warehouses or during long-term storage, the putty can clump and reduce its bonding effectiveness during application. To minimize losses and facilitate the loading, unloading, and transportation of heavy packages (commonly weighing from 20kg, 25kg to 40kg), using specialized kraft paper bags for wall putty is a solution chosen by many factories.
1. Types of Materials Used for Kraft Paper Bags for Wall Putty
Depending on the product segment, specific storage requirements, and packaging technology of each factory, paper-based putty packaging is produced from different materials and structures:
1.1. Virgin Kraft Paper
This is a type of packaging made from layers of Kraft paper produced from natural wood pulp.
• Structure: Usually designed with 2 to 6 thick layers of Kraft paper stacked on top of each other.
• Characteristics: This type of bag has a naturally light moisture absorption capacity on the surface, helping to reduce the amount of moisture accumulated inside. To increase the protective effect of putty, manufacturers often insert a layer of plastic film in between or a separate PE bag inside.
1.2. PE Woven Kraft Paper (KP Bags)
This type of bag has high mechanical strength and is widely used in the construction additive industry due to its good tear resistance.
• Structure: The outer Kraft paper layer is laminated with a load-bearing PP/PE woven fabric layer on the inside using a specialized adhesive.
• Characteristics: This structure is relatively flexible, minimizing the risk of side bursting or bag breakage during loading, unloading, and transportation at construction sites or when stacked in multiple layers on pallets.
1.3. PE-Coated Kraft Paper Bags
This type of bag focuses heavily on moisture barrier properties, helping to prevent putty from clumping during storage.
• Structure: The inner (or outer) surface of the Kraft paper layers is coated with a thin layer of PE (Polyethylene) plastic film.
• Characteristics: The PE coating helps prevent most moisture and humidity from the external environment from penetrating into the putty. This coating also helps limit the leakage of fine powder through the gaps in the paper, keeping the warehouse environment cleaner.
2. Some Notes When Choosing Kraft Paper Bags for Putty
To balance production costs and effectively protect product quality, businesses should consider the following factors when ordering packaging:
• Choosing a suitable moisture-resistant structure: Wall putty is easily affected by water. Therefore, businesses should prioritize choosing bags with integrated PE coating or using independent inner PE bags to increase moisture resistance.
• Pay attention to the design of the bag opening and bottom: For factories using high-speed automated packaging technology, bags with double-sealed ends and a filling valve (sealable bags) are quite suitable because the bag opening will automatically close after filling with powder. If packaging is done semi-manually, bags with sewn bottom seams will help optimize initial investment costs.
• Clear information display: Construction packaging needs to clearly display the brand logo, mixing ratio instructions, and warning information. Therefore, choosing suppliers that use Flexo printing technology will result in clearer printing and less scratching during handling and transportation.
3. JPTVN – A Quality Kraft Paper Bag Manufacturer for Putty
If your business is looking for a supplier of kraft paper bags for putty with direct manufacturing capabilities, JPTVN is one of the units that can meet these requirements:
• Stable Imported Paper Source: JPT uses imported virgin Kraft paper from the Oji Group (Japan). The paper fibers have elasticity and mechanical strength that meet common testing standards such as BRCGS and HALAL.
• Direct Factory Production: JPT directly processes the products in its own factory, without intermediaries, helping to provide reasonable prices and suitable support policies for large quantity orders.
• Quality Control Process: Each batch of packaging is inspected for tensile strength, tear resistance, and airtightness before shipment, minimizing technical errors during use.
