Salt packaging bag

Salt is highly corrosive and hygroscopic, so the material must have superior moisture barrier properties. The most common structure is a multi-layer laminate such as PET/PE or BOPP/PE. For premium or industrial salts requiring higher protection, PET/AL/PE (Aluminum foil) is recommended to provide a 100% barrier against light, oxygen, and moisture, preventing the salt from clumping or hardening.

For retail table salt, Stand-up Pouches (Doypack) with resealable zippers are preferred for consumer convenience. For bulk or industrial salt, Heavy-duty PE bags or PP Woven bags with PE liners are necessary to handle weights of 25kg to 50kg. For high-end gourmet salts (like Himalayan Pink Salt), Flat Bottom Bags with a transparent window are ideal to showcase the product texture while maintaining a premium shelf presence.

Since salt is a food product, the packaging must be Food Grade and certified by recognized bodies. Ensure the supplier provides FDA (U.S.) or EC 1935/2004 (EU) compliance certificates. Additionally, materials should be BPA-free and meet ISO 22000 or BRCGS standards for food safety management systems to avoid chemical migration into the salt.

Salt dust can interfere with heat sealing; therefore, suppliers should use high-quality sealing layers (like Metallocene PE) that can seal through contamination. For printing, Rotogravure printing is recommended for high-volume orders to ensure the ink is trapped between layers (internal printing), preventing the salt or external friction from eroding the brand graphics.

Request a Pre-shipment Inspection (PSI) through third-party agencies like SGS or Intertek. Focus on burst pressure tests and seal strength tests to ensure the bags won't rupture during sea freight stacking. On Made-in-China.com, prioritize Audited Suppliers who have undergone comprehensive on-site verification of their production capabilities.

Negotiate based on Total Volume vs. Release Schedule. You can often secure a 10-15% discount by committing to an annual volume while requesting staggered shipments. Also, clarify the Cylinder/Plate costs for printing; experienced buyers usually negotiate for these fees to be waived or refunded once the cumulative order volume reaches a certain threshold.

Plastic bags are sensitive to extreme heat during transit, which can cause 'blocking' (bags sticking together). Ensure the supplier uses heavy-duty corrugated export cartons and palletizes the goods with stretch wrap to prevent moisture ingress and physical deformation. For long-haul sea freight, specify FOB terms to maintain better control over the shipping timeline and costs.

Utilize Secured Trading Services offered by Made-in-China.com to ensure that payment is only released to the supplier after you confirm the receipt of goods in the agreed condition. Avoid using untraceable payment methods; instead, stick to Letter of Credit (L/C) for large industrial orders or Telegraphic Transfer (T/T) with a clear 30% deposit / 70% balance against B/L copy structure.