Coats

Stack of towels

The Best Threads for High-speed Automatic Hemming

Contents

Introduction
Thread Recommendations
Coats Epic – High Tenacity Polypoly Corespun Thread
Terry Towel Stitching
Coats Astra – High Tenacity Spun Polyester Thread

Introduction

Traditional towel hemming with manual stitching in chain stitch and lock stitch machines are a thing of the past. Today fully automatic hemming machines are available for both cross hemming and length hemming. These high-speed machines come with complete automation for various functions such as cutting, folding and sewing to help manufacturers increase productivity – up to 22 mtrs/min – much higher than for conventional manual sewing production.

Consequently, only high-tech sewing threads should be used in these machines to deliver the required productivity benefits. However, often, conventional staple spun threads continue to be used, resulting in expensive sewing equipment running at lower than optimum speeds to avoid thread breaks and stoppages. The resulting loss of productivity makes it more difficult to justify the machine investment and adds manufacturing cost.

That is why Coats recommends only specially designed high-performance sewing threads be used in high-speed hemming machines to ensure maximum productivity and minimize the amount of rework and rejection levels due to thread related issues.

Thread Recommendations

Coats recommends two thread qualities:

Coats recommends two thread qualities
Epic Astra
1. Coats Epic – High Tenacity Polypoly Corespun Thread 2. Coats Astra – High Tenacity Staple Spun Polyester Thread
Epic logo Astra logo

Coats recommends the following threads for high-speed automatic towel hemming machines:

Coats Epic – High Tenacity Polypoly Corespun Thread

Epic coneCorespun thread

Threads for high-speed automatic towel hemming machines
Article No. Ticket No. Thread Size Average Breaking Strength Ply Package Length (m) Recommended Needle Size -
Single
Recommended Needle Size -
Metric
 2994 100 30  1500 2 5000 14 - 18 90 - 110
Features Benefits
Made in corespun construction from high tenacity polyester Lower fault levels and good uniformity in thread
Higher thread strength even in finer thread size
Reduction in thread breaks and uninterrupted sewing resulting in higher machine productivity
Optimum lubrication Smooth flow of thread, hence reduced needle heat and subsequent damages
Optimum twist levels Good loop formation, no skipped stitches at optimum machine settings
Higher abrasion resistance  No damage to the thread / stitch, hence longer seam life in daily washing of towels
Good sewing performance Best suited for reverse feed lock stitch sewing in cross hemming

Various trials conducted globally show that the use of Coats Epic threads in home textiles increases the productivity and quality of the product by reducing the cost significantly. This thread is proven to be a versatile thread recommended for most home textile applications.

Features and Benefits

  • Core filament construction gives better tenacity / breaking strength
  • Better seam strength
  • Less thread breakages in sewing
  • Usage of finer needles without compromising on the seam strength
  • Zero thread puckering
  • Core filament construction gives better elongation
  • Better seam elongation
  • Has good abrasion resistance
  • Longer seam life

Terry Towel Stitching

Machine Requirements

Terry Towel Stitching Machine Requirements
High speed stitching Sewing thread must have good strength High tenacity thread
Less machine stoppages due to:
a) Thread breakages
b) Needle breakages
Good strength and low fault level yarn High tenacity thread with significantly lower fault levels, which gives less loading on the needle.

Quality Requirements

Quality Requirements
Properties Thread Requirements Coats Epic Offers
Better seam strength and elongation Sewing thread must have good strength and elongation High tenacity thread with superior elongation properties
Better seam appearance / aesthetics Fine thread with good elongation Fine threads on finer needles gives better seam appearance with less seam pucker
Fewer skipped stitches Better loop formation Controlled elongation at initial loading helps in making better loop formation
Fewer repairs / reworks Less thread breakages High tenacity thread reduces the thread breakages significantly
Towels

Coats Astra – High Tenacity Spun Polyester Thread

Astra coneStale sun thread

Coats Astra - High Tenacity Spun Polyester Thread
Article No.  Ticket No.  Thread Size  Average Breaking Strength (Grams)  Ply  Package Length 
(m) 
Recommended Needle Size - 
Single 
Recommended Needle Size - 
Metric 
8754 80  40 1500  5000  14 - 18  90 - 110 
Features Benefits
Made from super high tenacity polyester fibres Higher thread strength
Reduction in thread breaks and uninterrupted sewing resulting in higher machine productivity
Optimum lubrication Smooth flow of thread, hence reduced needle heat and subsequent damages
Optimum twist levels Good loop formation, no skipped stitches at optimum machine settings

Towel machineTowels blue

Please contact your local Coats office or your sales representative for more details on availability and recommendations for your specific end use application.