Non-quilted Down
Non-quilted Down is a structure and processing method for down products with no visible stitching, in which the shell fabric and lining are not sewn together but compartments are formed by bonding or other methods and filled with down.
Contents5 sections
Definition and Overview
Non-quilted down is a specification in which, instead of securing the shell fabric, filling, and lining with stitching like a typical down jacket, the inside of the shell fabric and lining are bonded to create compartments for down fill. It gives a clean appearance because stitch lines are less visible on the surface.
The internal partitions that create the compartments are also called baffles. While this often refers to a baffle structure created by bonding, the scope of the term varies by planning and production site, so it is important to share the structure with diagrams in the specification sheet.
Production Process
At the planning stage, determine the shell and lining materials, amount of down, compartment shape and dimensions, and the position of the bonded areas. Because the suitability of the bonding process affects the product's appearance and durability, consult the processor at the same time as selecting materials.
In general, prepare a shell and lining that can be bonded, form the compartments using heat or pressure, then fill the down through the opening. After that, close the opening and proceed to sewing, finishing, and inspection. The filling method and process sequence vary depending on factory equipment and product design.
Before mass production, carry out trial production to confirm the bonding conditions, and conduct evaluations assuming wear and washing. Adjust the dimensions of the bonded compartments and the fill amount while checking for down shifting, loft, and visual uniformity.
- List the compartment shape, dimensions, bonding width, and filling opening position in the specification sheet.
- Make trial samples with the shell, lining, and adhesive material combined.
- Check the appearance after filling and control the fill amount for each compartment.
- On production samples, check interference around the bonded areas, sewing sections, and zippers.
Features and Differences from Conventional Quilting
Conventional quilting is a method of sewing multiple layers together with stitching to secure the filling. In contrast, a major difference with non-quilted down is that stitch lines are less likely to appear on the surface. It is used for products that call for a minimal design or a sporty, smooth look.
However, the absence of stitches alone does not determine warmth, wind resistance, or water resistance. The product must be evaluated as a whole, including the performance of the shell fabric, the structure of the bonded areas, the type and amount of down, and the sewing specifications of each section.
Seamless down and stitchless down are used in meanings close to non-quilted down. Bonded down is a term that focuses on compartment formation by bonding, but none of these are standard names that uniformly guarantee the processing method or structure.
Notes on Ordering and Quality Control
When placing an order, specify the shell, lining, and adhesive material to be used, and confirm conditions such as bonding temperature, pressure, and time with the processor. Depending on the surface finish or coating, stretch characteristics, and dyeing conditions of the material, sufficient bonding strength may not be achieved.
The main inspection items are peeling of the bonded areas, down leakage after filling, compartment shape defects, and changes in appearance after washing. Friction, bending, and low- or high-temperature environments can also affect the bonded areas, so set evaluation conditions according to the intended applications.
In sewing, consider needle holes that cross bonded compartments, and post-processing such as pockets, zippers, and logo attachment, so that they do not cause down leakage or delamination. It is also practical to decide repair methods, washing instructions, and handling directions before mass production.
Frequently Asked Questions
What is the difference between non-quilted down and quilted down?
Quilted down uses stitching to secure the shell, lining, and filling to create compartments, whereas non-quilted down mainly forms compartments by bonding. The difference is that the former often shows stitch lines, while the latter tends to have a smooth surface with less visible seams.
Can non-quilted down be washed?
Whether washing is possible is determined for each product based on the combination of shell, lining, adhesive material, down, and sewing specifications. Because the bonded areas may be affected by washing, drying, heat, and friction, conduct washing tests during the planning stage and decide the washing instructions and handling methods based on the results.
What needs to be confirmed before ordering non-quilted down?
Share the compartment design, the combination of shell, lining, and adhesive material, the amount of down fill, bonding conditions, and quality standards in advance. In particular, perform bonding tests on actual fabric and confirm the appearance, peeling, and down leakage after filling and after washing, then manage mass production based on the approved sample.
