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Classification of Polypropylene Filament
Polypropylene filament is one of the three major synthetic fibers. Density is lower than water; it is hydrophobic and chemically resistant. It is used in webbin
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Mill notes, not brochure copy
Rewritten from Weiye’s own posts on yarn types, shade control, cotton counts and book headbands. Numbers below appear on those posts.
Article
Classification of Polyester DTY
DTY is the standard low-elastic polyester yarn used as weaving yarn for webbing. Intermingling types named on the mill note: NIM (normal), SIM (semi) and HIM (
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Color Difference Issues in Webbing Production
Color difference in webbing is a common quality pain point. Types named: inter-batch variation between dye vats; intra-batch end-to-end or sectional difference;
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Headbands for Hardcover Bookbinding
Headbands, also called bookbinding tape or book edge tape, are processed webbing with decorative stitching along the edges. Materials named: cotton headbands a
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Introduction of Cotton Yarn Count
Cotton yarn thickness is expressed as count, written as S: 10s, 18S, 21s, 32S, 40s, and rarely 60 and 80. Higher count means finer yarn. The British system sti
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Polyester Properties
Figures published on the mill note: amorphous density 1.333 g/cm³, crystalline 1.455, typical 1.38–1.40. Moisture regain 0.4%. Softening 230–240°C, melting 255–
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Advantages and Disadvantages of Polypropylene Fiber
Published figures: density 0.90–0.92 g/cm³, described as the lightest chemical fiber — 20% lighter than nylon, 30% lighter than polyester, 40% lighter than visc
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Ribbon Classification by Weaving Process
The mill note splits ribbon into woven belt and knitted belt. On jacquard ribbon the weft is fixed and the pattern is expressed by the warp — the opposite of a
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Ring Spinning vs Rotor Spinning
Ring spinning: fibers lie close and even, less hairiness, smoother fabric. Rotor spinning: looser fiber arrangement, more hairiness, a plump soft hand, and larg