Resin, urea and injection-moulded plastic buttons
UP resin, urea-formaldehyde, polyester (PET), ABS and nylon — the codes button factories actually use, and where each material belongs.
Matching thread, needle and seam
Fabric weight, needle NM, ticket/tex and stitch type as one spec — why a 40s/2 on chiffon, or a 60s needle on 14 oz denim, fails in bulk.
Specialty sewing threads: FR, bonded, waterproof and conductive
When a seam needs more than polyester 40s/2 — inherent FR, aramid, waterproof, elastic, antibacterial and conductive sewing threads on a garment BOM.
Cotton and silk sewing thread: mercerised, glazed and filament silk
When a natural sewing thread is still the right spec — soft cotton, mercerised, glazed, and the silk tickets that remain on silk and wool tailoring.
Horn, shell and wood: natural-look sew-on buttons
Real horn, freshwater shell, corozo and wood versus urea and polyester imitations — how to spec a natural-look button without surprises in bulk.
Nylon sewing thread: stretch, abrasion and bonded filament
Polyamide 6 and 66 sewing thread — why nylon wins abrasion and recovery, where UV and heat rule it out, and what bonded filament is for.
