Dry-dot-printing – The resin is printed on to the fabric through engraved roller having micro grooves to retain the resin. 3. Paste coated – the net like structure is formed by heating the resin and then it is laminated on the fabric by applying heat and pressure. 8.1.4 Fusing machinery and equipment In spite of what kind of fusible and equipments are used, fusing is controlled by four processing elements, such as, pressure, temperature, time and cooling and these have to be precisely combined in order to achieve the desired results. 1.
Since the mold need not be opened complex geometries of the turbine blades can be made by combining several wax patterns. A mold from which a pattern can be made is also machined as the wax patterns are destroyed each time a mold for casting is made. • Mold making for investment casting: The pattern is dipped in a refractory slurry which deposits a layer of ceramic coating over it. The pattern is repeatedly dipped to increase the thickness of the ceramic layer. After the desired thickness is deposited the pattern with ceramic mold is allowed to dry in air to harden.
SFE is used to extract pharmaceuticals from liquid and solid samples. The other widely used industrial applications are tobacco extraction, extraction of fats and oils and making of spice extracts. (5) SFE is mainly used for the extraction of bioactive compounds from a mixture for purification, quantification of active enantiomer, extraction from natural matrices, etc. SFE is effective in separating enantiomers. For example a simple resolution for the enantiomers of trans-1,2-cyclohexanediol by diastereomeric complex formation with tartaric acid and subsequent supercritical fluid extraction is developed.
CHROMATOGRAPHIC METHODS: After successful extraction of phospholipids from their source analysis can be performed for the detection of specific phospholipids. This section will discuss chromatographic methods used for the analysis of phospholipids. All systems of chromatography consist of a stationary and mobile phase. A monster placed on a stationary phase, i.e., a solid or a liquid, and the mobile phase, a gas or a liquid, is allowed by modifying the system. The components of the sample will be separated on the basis of their ranging physical and chemical properties, imparting different affinities for the two phases.
II) Mixing: Reclaimed rubber and oils III) Extruding: The mixture of rubber so obtained is put into extruder to form rubber sheets. IV) Retreading: Before retreading tyre is buffed and it is allowed to stick properly. Tyres are buffed properly to remove all undesired rubber and to clean surface. The retreading rubber is now put on its outer surface with an adhesive solution. Retreading process is of two types:- 1.
This method also has the objective of minimizing damage to the cellulose of the wood and thus maintain the pulp strength properties. This method separated fibers by dissolving away lignin component, maintain fibers and most of the cellulose and some hemicelluloses retained behind. The resulted pulp often called as chemical pulp, referring to the chemical pulping process. Kraft, sulfite and soda are three major chemical pulping methods known today. Kraft Pulping Kraft process are often called kraft pulping is the most used chemical pulping in the pulp and paper industry.
The first step in the process is to create a substrate in the first cavity, which receives material from one of the two injection units. The tool then opens to allow for a 180° rotation to a secondary position after the finished part is removed from the second stage cavity. As the tool closes, the second step commences by positioning the previously molded substrate into the second cavity. The second cavity receives the material from the second injection unit completing a finished part, this occurs simultaneously as the substrate for another part is being molded. The key benefits of the ‘Two-Shot’ injection moulding are as
Cooled clinker is then ground with gypsum (CaSO4*2H20). The addition of gypsum controls the aluminate chemistry and the setting time of cement concrete. Portland cement reacts with water to form a paste that binds the aggregate particles together to form concrete. Ordinary Portland Cement (OPC) of grade 53 is used in the project. The cement
F) Micro Extraction by Packed Sorbent (MEPS) MEPS are a miniaturization of the ordinary SPE. The sorbent bed of MEPS is incorporated into a liquid handling syringe which permits samples with low void volume. Then the solvent volume is injected straightly into the liquid chromatography or gas chromatography. Procedure of MEPS There are 4 distinct stages are involved in the MEPS which are sampling, washing, elution follow by injection. Stage 1: Sampling The samples are cycled over the MEPS Barrel insert and needle (BINS) so as to transfer the interested compound into the sorbent.
Amines are the most commonly used curing agents/hardeners for epoxides. One epoxy ring reacts with each aminoproton. Aliphatic amines are used for low-temperature curing systems(adhesives, coatings, etc. ), and aromatic diamines for composite materials. Cyanoguanidine, or dicyanodiamide (Dicy), is a very versatile hardener widely used in one-pack epoxy formulations for prepregs, laminates, powder coatings, etc.