Polypropylene Bag Closing Thread

Mahalaxmi Thread Polypropylene Thread

Product overview

Polypropylene (PP) thread from Mahalaxmi Threads is engineered for industrial sewing and packaging operations that demand a balance of strength, moisture resistance, chemical stability, and lightweight performance. Made from high-tenacity polypropylene multifilament yarn, this thread delivers dependable seam integrity and smooth sewing performance across a wide range of applications, especially in bag closing, woven sacks, and industrial packaging environments.

Polypropylene thread is inherently hydrophobic and absorbs virtually no water, making it an excellent choice for sewing products exposed to moisture, humidity, or damp conditions. This low moisture uptake also prevents swelling, distortion, and mildew growth, outcomes that can compromise seam quality over time.

Compared to other synthetic threads, PP thread delivers lightweight yet reliable strength with excellent abrasion, UV and chemical resistance, enabling manufacturers to achieve secure and reliable seams on both portable and high-speed machines.

Technical specification

Tkt Tex No. Construction (Ply/Ne) Breaking Strength (Kg) Elongation Range (%) Recommended Needles (NM)
180 16 150*1 0.60 20 – 34 70 – 80
110 24 198*1 0.90 25 – 30 80 – 90
90 35 300*1 1.20 20 – 34 90 – 110
50 50 150*3 1.80 25 – 30 80 – 110
35 60 150*4 2.40 25 – 30 110 – 130

Key Features & Benefits

High tensile strength and seam security:

High tensile strength and seam security: Crafted from high-tenacity polypropylene multifilament yarn, this thread delivers strong seams that stand up to handling, transport and stacking in industrial and packaging applications.

Lightweight construction:

Polypropylene’s low density provides an excellent strength-to-weight ratio — particularly valuable in sewn bags and textiles where weight reduction improves efficiency and cost savings.

Moisture and hydrolysis resistance:

Virtually no moisture absorption prevents seam distortion, keeps sewing consistent, and guards against mold, mildew and weakening in humid or damp environments.

Abrasion and UV resistance:

PP threads maintain integrity when exposed to rough surfaces and sunlight, making them suitable for outdoor bags, woven sacks, and bulk packaging.

Smooth sewing performance:

Uniform twisting and multifilament structure allow consistent feeding on portable, semi-automatic, and high-speed industrial sewing machines.

Chemical inertness:

Polypropylene is resistant to a wide range of industrial chemicals and solvents, ensuring seam durability even when sewn goods come in contact with acids or alkalis.

Typical applications

Polypropylene sewing thread is engineered for industrial assembly and packaging processes where seam strength, environmental resistance, and efficiency are critical.

Sewing operations

Overlock

Coverstitch

Flatlock

Serger machines

Multi-needle industrial stitching

Bag closing and packaging

Secures closure on cement, fertilizer, feed, grain, sugar, chemical and construction material bags with consistent performance.

Woven sacks & FIBC stitching

Ideal for sealing woven polypropylene sacks and industrial woven fabric products where lightweight strength and seam integrity are required.

Tarpaulins & protective covers

Used in sewing protective covers and tarpaulins that see outdoor exposure, abrasion and stress.

Agriculture & feed bags

Delivers reliable closures for feed, seed and other bulk agricultural packaging.

Industrial textiles

Suitable for sewing seams in woven industrial fabrics where resistance to chemicals or moisture is essential.

Light industrial products

Used in the manufacture of nets, sacks and other sewn polypropylene products requiring balanced strength and flexibility.

Product Properties

PropertyDetails
Composition100% Polypropylene
ElongationVery low – for high-tension stitch control
LubricationMicro-molecular finish for smooth machine performance
UV ResistanceHigh – suitable for outdoor storage and transport
Tensile StrengthHigh – ideal for heavy-duty and bulk-load applications
PackagingCones, reels and custom industrial-size formats
Colour OptionsStandard white and select industrial shades (custom shades on request)

Manufacturing Excellence

Mahalaxmi Threads leverages advanced manufacturing capabilities to ensure our textured polyester sewing threads meet the highest industrial standards:

Precision twisting and texturizing

deliver consistent thread diameter and bulk.

Finishing treatments

like lubrication reduce friction and extend needle life.

Standardized production protocols

maintain uniformity in tensile strength, elongation, and seam performance.

ISO 9001:2015 certified systems

ensure consistency, safety, and compliance for industrial-grade usage.

Why Leading Packaging & FIBC Manufacturers Choose Mahalaxmi