Search results
Results from the WOW.Com Content Network
From 1922 to 1957 it was used to make film stock, mainly in smaller formats such as 8 mm, 16 mm, 35 mm, and 70 mm. It has also been used in seed coating applications. [1] In photography, a film substrate made from cellulose diacetate is called safety film. Cellulose diacetate is hydrophilic [2] and biodegradable. [3]
Epoxy compounds are also referred to as glycidyl compounds. The epoxy molecule can also be expanded or cross-linked with other molecules to form a wide variety of resin products, each with distinct performance characteristics. These resins range from low-viscosity liquids to high-molecular weight solids. Typically they are high-viscosity liquids.
For kinematic viscosity, the SI unit is m^2/s. In engineering, the unit is usually Stoke or centiStoke, with 1 Stoke = 0.0001 m^2/s, and 1 centiStoke = 0.01 Stoke. For liquid, the dynamic viscosity is usually in the range of 0.001 to 1 Pascal-second, or 1 to 1000 centiPoise. The density is usually on the order of 1000 kg/m^3, i.e. that of water.
Bast fiber: Fiber flax 71 2.2 18.6 – 20.6 2.3 – Seed flax 43–47 21–23 24–26 – 5 ... High absorption can cause fiber shrinkage and matrix swelling. However ...
It is commonly used as a viscosity modifier or thickener and to stabilize emulsions in both food and non-food products. It is used primarily because it has high viscosity, is nontoxic, and is generally considered to be hypoallergenic, as the major source fiber is either softwood pulp or cotton linter.
Films made from nanocellulose have high strength (over 200 MPa), high stiffness (around 20 GPa) [46] but lack of high strain [clarification needed] (12%). Its strength/weight ratio is 8 times that of stainless steel. [47] Fibers made from nanocellulose have high strength (up to 1.57 GPa) and stiffness (up to 86 GPa). [48]
Rayon, also called viscose [1] and commercialised in some countries as sabra silk or cactus silk, [2] is a semi-synthetic fiber [3] made from natural sources of regenerated cellulose, such as wood and related agricultural products. [4] It has the same molecular structure as cellulose. Many types and grades of viscose fibers and films exist.
The fiber uniformity upon achieving stable flow rates and thermal equilibrium, tends to be very good. The whipping instability which is the predominant stage in which the fiber is stretched for spinning from solutions can be absent from the process due to the low melt conductivity and high viscosity of the melt.