To understand the properties of this process, we should divide it into its two fundamentals process which are: web forming and web bonding.
Web bonding: it has two important parts (carding and lapping).
- Carding it can be understood as a process that “combs” the fibers, they go into the carding machine not well opened and most of the times as a lump; the process made by the carding machine is to separate, give direction and position each fiber in a web layer in order to continue to the bonding phase. We have the ability of supply different types of fibers, which can give the final product specific characteristics according to the needs of our clients (check raw materials).
During carding process the fibers can spin mechanically by carding rolls or by blown air (turbocarding), both ways can affect MD/CD ratio directly.
- Lapping means give direction to the web layer that leaves the carding machine; for easy understanding we have to bring two additional concepts: Machine direction (MD) and Crossed direction (CD), both describe the position of the fiber compared to the position of the machine itself. To know the fabric lapping you can check its MD/CD ratio, the higher means parallel material while the lower means crossed material.
That possibilities are the following:
- Parallel Lapping, MD/CD = 5 a 7 : 1
All fibers are oriented in the same direction.
- High speed
- More unifromity
- Lower Price
- More elongation
2. Crosslapping, MD/CD = ( 1- 1.5 ):1
Some layers spin mechanically, crossed direction.
- Best ratio MD/CD
- Lower production speed
- Higher cost
- Geometric designs
- Customized desings
- Perforated fabrics
|PLA||Medium||Higher than cotton, lower than lyocell||Low weight fiber||Yes|
|Lyocell||High||High in humidity||Very strongh while dry||Yes|
|PI Cotton||High||Good||Color retention||Yes|
|PP||Low||High||Lighter than PET||Yes|
|WEIGHT||gsm||30-100||Low basis weight fabrics do not apply for wet wipes|
|WIDTH||mm||200-3200||Width are defined with each customer to calculate loading capacity|
|ROLL DIAMETER||mm||560-1200||Below 1000mm the loading capacity is lower|
|CORE INNER DIAMETER||inch||3.6|
|COLOR||NA||White witouth brightening, and colors||We do not supply optical white since it is not legal in the county of production|
|FINISHING (EMBOSSED, FLAT,..)||.- Plain -Geometric design -Customized design -Perforate fabrics -Pinted|
|PACKING||PE stretch film and card boards for each bundle|
|AVAILABLE PRODUCTION CAPACTY||TON/MONTH||290-350||MOQ: 1x40hq container|
|FIBERS USED||Viscose, PET, Cotton, PP, Cellulose, Bamboo, Bicomponent fibers|