What are Tissue Papers?
The term "tissue" describes products made of low weight, dry crepe and some uncreped paper , such as toilet paper , kitchen towels , tissue paper , facial paper , napkins , towels , etc. The origin of the fibers may be virgin fibers or recycled fibers. Properties of important tissue papers are the absorption of elastic energy along with good flexibility, superficial softness, bulk and high capacity for absorption of liquids. The biggest and most important use for tissue papers is for hygiene products such as:Amazon Brand - Presto! Flex-a-Size Paper Towels, Huge Roll, 12 Count = 30 Regular Rolls
- Hygienic Papers
- Kitchen Towels
- Double Sheet Paper Towels
- Facial Tissue
- Disposable diapers
- Hospital Paper
- Health & Beauty
- Refreshing Towels
Tissue paper is used for the production of a huge quantity of products, and the quality requirements vary according to the purpose of the product and the expectations of the consumer. In some products, softness may be the fundamental property, while in others it may be resistance . In some situations, the product needs to be water absorbent , in some cases oil. The physical properties that determine the quality of a tissue paper are bulk, softness and absorption capacity. According to these characteristics, paper can be classified into three quality categories according to the different requirements of the tissue markets in the world: conventional, intermediary and premium . The main quality requirements that can be measured on tissue paper are:
- Grammage
- Absorption
- Softness
- Thickness (Bulk)
- Tensile strength
- Whiteness
- Crepe
- Elongation
- Appearance
Hedgehog
These characteristics may vary according to the product, but the following properties may be considered as basic characteristics:
Formation
Good formation is extremely important to ensure uniformity of the cross-sectional profile of the sheet of paper;
Grammage
Usually in Brazil we use a weight of 18 to 20 g / m² for toilet paper , 30 to 40 g / m² for paper towels and 16 to 20 g / m² for double-sheet towels and napkins . Variations can be found according to the manufacturer.
Moisture
It should be controlled maintaining a moisture content between 7.0 and 8.5%, for better runnability of the process. A content of 5.0 to 6.5% ensures the sheet characteristics of roughness, low surface softness in addition to intrinsically damaging the creping. And a very high humidity, between 9.0 and 10.5%, directly reduces the tensile and elongation strengths of the sheet, also damaging the paper conversion.
Tensile strength
Important to avoid the paper's ability to withstand stresses during rewinding and during application.
Stretching
This feature is widely used to evaluate the tissue paper quality, being directly related to creping.
Softness (superficial and volumetric)
Property that gives the papers nice features of feel and feel of softness, as well as for the appearance of the product.
Resistance to humidity
Important for paper application, ensuring that it does not disintegrate, in contact with moisture.
Bulk (specific volume)
It is the degree of compressibility of the paper. It is related to all paper properties (mechanical and optical).
Crepagem
It is calculated as a function of the crepe percentage, which is the ratio of Yankee dryer roller speed to bobbin speed.