Manufacturing & Service Operations | Functions of Supply Chain

Supply Chain

A supply chain is a network of individual functions within an organization that begins with the development of a strategic plan and ends with the delivery of a product or service. Those functions are listed below:

1. Demand Planning
2. Supply Management and Procurement
3. Inventory Management
4. Warehousing Operations
5. Manufacturing and Service Operations
6. Transportation Operations
7. Customer Service Operations

Fibre Properties Affected by Spinning Methods

Different spinning methods have different types of influences on fibre properties. So output yarn properties vary according to the spinning methods as below-

Order of importance	Ring	Rotor	Air-jet	Friction
1	Length & length uniformity	Strength	Fineness	Strength
2	Strength	Fineness	Cleanliness	Fineness
3	Fineness	Length & length Uniformity	Strength	Length & length uniformity
4			Length & length uniformity	Cleanliness

What is Ring data system?

Ring data is an additional attachment for data collection. It is one kind of software which collects data about the ring frame. It is also called production controlling system of the ring frame.

The data collected on:

👉Production data (OPS, GMS total data of previous 3 shift) 👉End breakage rate 👉Machine efficiency 👉Doffing time 👉No. of Doff 👉Machine downtime

👉Yarn count 👉Yarn lot 👉No. of working spindle 👉Fibre type 👉TPI 👉Spindle speed

Comparison of different spinning methods

	Ring-Spun yarn		Open-end yarn		Air-jet yarn		Wrap yarn
	Classic	Compact	Rotor spun	Friction spun	Jet spun, two nozzles, False twist process	Vortex spun, one nozzle	Filament wrapped
Fibre deposition:
In the core	Parallel, helical	Parallel, helical	Less parallel, helical	Less parallel, helical	Parallel w/o twist	Parallel w/o twist	Parallel w/o twist
In the sheath	Parallel, helical	Parallel, helical	More random, less twisted	Less parallel, helical	6% of fibres twisted around the core in spirals	20% of fibres twisted around the core in spirals	Filament windings
Fibre orientation:
Parallelism	Good	Very good	Medium	Low	Medium	Good	Very good
Compactness	Compact	Very compact, round	Open	Compact to open	Compact	Compact	Compact
Handle	Soft	Soft	Hard	Hard	Hard	Medium to hard	Soft
Hairiness	Noticeable	Low	Very low	low	Some	Low to medium	Very low
Stiffness	Low	Low	High	High	High	Fairly high	Low

Bangladeshi Cotton

The basic raw material of the textile sector is cotton. Cotton is commonly known is “Kapas Tula” in Bangladesh. The annual requirement of raw cotton for the textile industry of Bangladesh is estimated at around 2.5 million bales. Local production is only about 0.1 million bales. Around 4-5% of the national requirement is fulfilled through the local production, remaining 95-96% is fulfilled by importing raw cotton from India, CIS (Commonwealth of Independent States) countries, the United States of America and African countries. As per the latest information, within total cotton import, 46% comes from India and 20% from the African region and different cotton growing industries.