Cotton and Canvas: A Breakdown of Material Choices for Bag Manufacturing
2025-11-28
1、 The difference between yarn structure and weaving process
- Cotton fabric is made of single strand fine cotton yarn as the base material, and is woven into delicate fabrics through plain weave or diagonal weave. Its yarn diameter is usually between 20-40 strands, the fabric density is low, and the surface presents a soft luster.
- Canvas is woven with 2 or more strands of coarse cotton yarn, with a yarn diameter of up to 10-20 strands, significantly increasing the fabric density. Taking 10 ampere canvas as an example, its weight per square meter is 339 grams, and the surface presents obvious granular texture. This multi strand weaving structure endows canvas with extremely high tear resistance, and the grid like skeleton formed by the interweaving of warp and weft lines can withstand a tensile force of over 50 kilograms, far exceeding the load-bearing capacity of ordinary cotton fabric.
2、 Style positioning and craftsmanship adaptability
Cotton bags can present diverse styles through different post-processing techniques:
- Water washing treatment gives it a retro and vintage feel, suitable for making artistic style tote bags
- The enzyme washing process produces delicate fuzz on the surface, enhancing the sense of tactile hierarchy
- Digital printing technology can achieve high-precision pattern restoration and meet personalized customization needs
Canvas bags form style differences through yarn thickness and weaving density:
- 8A canvas (280g/m ²) is suitable for making lightweight backpacks, balancing breathability and load-bearing capacity
- 12 ampere canvas (420g/m ²) is commonly used to make tool kits, and its thickness can effectively protect precision instruments
- Coarse canvas (above 600g/m ²) can be created with military style through wax printing technology, and its waterproof performance has been improved to IPX4 level
3、 Selection and production suggestions:
- Choose cotton fabric bag: If you pursue lightweight and soft texture, used for daily short distance travel, shopping, or like rich printed patterns, ordinary cotton fabric is the cost-effective choice, especially suitable for summer matching.
- Choose canvas bag: If you need to load heavy objects (such as computers, books, outdoor equipment), pursue durability and three-dimensional design, or like retro and workwear style, high weight canvas is a must-have, and its service life is usually 3-5 times that of ordinary cotton bags.
summary
The two materials form a complementary relationship in bag making: cotton fabric meets personalized needs with a soft touch and rich printing, while canvas supports functional design with excellent durability. With the deepening of environmental protection concepts, composite materials using organic cotton yarn and natural dyes are emerging, such as blending 6-speed organic canvas with linen, which not only maintains lightweight but also improves breathability, providing more innovative possibilities for bag making.
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