In B2B industrial packaging manufacturing, paperboard rolls account for 60% - 70% of the finished product's value and directly determine the basic load capacity of the corrugated boxes. If substandard, thinner, or excessively wet paperboard is used, the resulting cardboard blanks will be soft, prone to flute crushing, and unfit for export shipping. To prevent these defects at the source, Chau Thai Son Printing and Packaging Joint Stock Company has standardized a highly rigorous Incoming Quality Control (IQC) process at its 30,000m² factory in Que Vo Industrial Park.
1. Verifying Paper Grammage (GSM) - Guarantees Material Thickness
Paperboard grammage (GSM - Grams per Square Meter, representing paper weight per square meter) directly determines box thickness and structural rigidity:
-
High-Precision Equipment: IQC staff cut random paper samples from newly arrived rolls using circular cutters with a standard area of 100cm², then weigh them on micro-electronic scales (0.01g resolution) to calculate the actual GSM.
-
Preventing Thickness Deviations: This verification ensures that duplex, couche paperboards for Offset printing, and Kraft liners for 3-ply, 5-ply, and 7-ply boxes match the exact technical specifications agreed upon with our B2B partners, guaranteeing maximum puncture and compression resistance.
2. Monitoring Moisture Content - The Key to Flat Corrugated Blanks
Moisture content is a critical factor influencing starch adhesive bonding when paperboard rolls pass through the BHS and Hsieh Hsu corrugator lines at Chau Thai Son's factory:
-
Strict Standard Range: The standard moisture content of incoming rolls must be maintained between 6% and 8%.
-
Consequences of Moisture Deviations: If the paperboard is too dry (humidity below 5%), fibers become brittle, leading to tearing when running through high-speed corrugating machines at 400m/min. Conversely, if paperboard is too wet (humidity above 9%), starch adhesives fail to cure properly, causing sheet warping, delamination, and a drastic drop in the Edge Crush Test (ECT) ratings of finished boxes.
-
Testing Method: Employs non-destructive contact moisture meters to scan across the roll width, verifying that humidity is evenly distributed from the outer layer to the roll core.
3. 3D Design Consulting and Free Physical Mockups
Importantly, IQC inspection data is utilized by Chau Thai Son's structural engineers during the packaging design process:
-
Saving 15% - 20% in Costs: Based on raw material specs, we consult on 3D structures and prepare physical Mockups completely free of charge for clients to test.
-
Real Stress Tests: Mockup samples are subjected to bursting strength and stack tests prior to mass production, delivering a secure and highly economical packaging solution.
Conclusion & Contact
A rigorous IQC raw material inspection system represents Chau Thai Son's commitment to delivering durable, high-aesthetic corrugated packaging that supports industrial B2B supply chains.
For businesses looking for premium Offset packaging solutions or corrugated cardboard sheets, please contact us at:
-
Website: https://chauthaison.vn/
-
Hotline: 0915 555 289
-
Email: baobi@chauthaison.vn
-
Factory Address: Lot C1-3, Que Vo Industrial Park, Phuong Lieu, Que Vo, Bac Ninh.
---
