High Temperature Adhesive ,High Temperature Cement,High Temperature Insulation Board,High Temperature Insulation ,Silicon Nitride Product,Aluminium Filtration Mesh,Refractory Materials,Moldables,Mastic Cements,refractory castable, กาวทนความร้อน
Pressure-sensitive adhesives are designed for either permanent or removable applications. Examples of permanent applications include safety labels for power equipment, foil tape for HVAC duct work, automotive interior trim assembly, and sound/vibration damping films. Some high performance permanent PSAs exhibit high adhesion values and can support kilograms of weight per square centimeter of contact area, even at elevated temperature. Permanent PSAs may be initially removable (for example to recover mislabeled goods) and build adhesion to a permanent bond after several hours or days.
Removable adhesives are designed to form a temporary bond, and ideally can be removed after months or years without leaving residue on the adherend. Removable adhesives are used in applications such as surface protection films, masking tapes, bookmark and note papers, price marking labels, promotional graphics materials, and for skin contact (wound care dressings, EKG electrodes, athletic tape, analgesic and transdermal drug patches, etc.). Some removable adhesives are designed to repeatedly stick and unstick. They have low adhesion and generally can not support much weight.
Silicon Nitride Product
วันพฤหัสบดีที่ 13 กุมภาพันธ์ พ.ศ. 2557
วันพุธที่ 12 กุมภาพันธ์ พ.ศ. 2557
Structural and pressure-sensitive adhesives
High Temperature Adhesive ,High Temperature Cement,High Temperature Insulation Board,High Temperature Insulation ,Silicon Nitride Product,Aluminium Filtration Mesh,Refractory Materials,Moldables,Mastic Cements,refractory castable, กาวทนความร้อน
Adhesives may be broadly divided in two classes: structural and pressure-sensitive. To form a permanent bond, structural adhesives harden via processes such as evaporation of solvent (for example, white glue), reaction with UV radiation (as in dental adhesives), chemical reaction (such as two part epoxy), or cooling (as in hot melt). In contrast, pressure-sensitive adhesives (PSAs) form a bond simply by the application of light pressure to marry the adhesive with the adherend. Pressure-sensitive adhesives are designed with a balance between flow and resistance to flow. The bond forms because the adhesive is soft enough to flow, or wet, the adherend. The bond has strength because the adhesive is hard enough to resist flow when stress is applied to the bond. Once the adhesive and the adherend are in proximity, there are also molecular interactions such as van der Waals forces involved in the bond, which contribute significantly to the ultimate bond strength. PSAs exhibit viscoelastic (viscous and elastic) properties, both of which are used for proper bonding.
In contrast with structural adhesives, whose strength is evaluated as lap shear strength, pressure-sensitive adhesives are characterized by their shear holding. The ability to hold in a shear mode is related to the formulation, coating thickness, rub-down, temperature, etc.
Pressure-sensitive adhesive
High Temperature Adhesive ,High Temperature Cement,High Temperature Insulation Board,High Temperature Insulation ,Silicon Nitride Product,Aluminium Filtration Mesh,Refractory Materials,Moldables,Mastic Cements,refractory castable, กาวทนความร้อน
From Wikipedia, the free encyclopedia
Pressure-sensitive adhesive (PSA, self-adhesive, self-stick adhesive) is adhesive which forms bond when pressure is applied to marry the adhesive with the adherend. No solvent, water, or heat is needed to activate the adhesive. It is used in pressure-sensitive tapes, labels, note pads, automobile trim, and a wide variety of other products.
As the name "pressure-sensitive" indicates, the degree of bond is influenced by the amount of pressure which is used to apply the adhesive to the surface.
Surface factors such as smoothness, surface energy, removal of contaminants, etc. are also important to proper bonding.
PSAs are usually designed to form a bond and hold properly at room temperatures. PSAs typically reduce or lose their tack at low temperatures and reduce their shear holding ability at high temperatures; special adhesives are made to function at high or low temperatures. It is important to choose an adhesive formulation which is designed for its intended use conditions.
From Wikipedia, the free encyclopedia
Pressure-sensitive adhesive (PSA, self-adhesive, self-stick adhesive) is adhesive which forms bond when pressure is applied to marry the adhesive with the adherend. No solvent, water, or heat is needed to activate the adhesive. It is used in pressure-sensitive tapes, labels, note pads, automobile trim, and a wide variety of other products.
As the name "pressure-sensitive" indicates, the degree of bond is influenced by the amount of pressure which is used to apply the adhesive to the surface.
Surface factors such as smoothness, surface energy, removal of contaminants, etc. are also important to proper bonding.
PSAs are usually designed to form a bond and hold properly at room temperatures. PSAs typically reduce or lose their tack at low temperatures and reduce their shear holding ability at high temperatures; special adhesives are made to function at high or low temperatures. It is important to choose an adhesive formulation which is designed for its intended use conditions.
วันเสาร์ที่ 6 กรกฎาคม พ.ศ. 2556
What kind of glue.
Was produced to be used for material fabric By this time the adhesive will not harm the skin. And less time to dry.
Perhaps we could call this type of glue that "Glue CA" production of chemicals called cyanobacteria acrylate. You are the glue that hold the joint practice is quite tight and dry within 10 to 30 seconds by just one square inch of adhesive bonding material that weighs more than one ton easily. The box will look like a liquid or gel.Can be put to immediate use. If the liquid is applied to materials, plastic, metal, rubber, vinyl and ceramic tiles. Girl with a gel adhesive. Materials to be used with wood and material with different pore. Applications just dipping glue surface to be identified only There are many brands to choose from and the type of adhesive that hot glue.
Adhesive types.
In the year 1951 Dr.Harry Coover has partnered with Dr.Fred Joyner led the cyanobacterium acrylate compounds to new research by the then Dr.Harry Coover moved to the Kodak Company. The Eastman Company in the State of Tennessee, USA Tel. During which they are conducting research on the heat resistance of Acrylate polymers. (Acrylate-polymer) for use in the roof (Canopies) of the jet on Dr.Fred Joyner growing film material for ethyl acrylate cyanobacterium. (Ethylcyanoacrylate) crystalline substance, he has seen it happen more attention. Seriously and has conducted research with other drivers. Cooper River until the dream came true when he brought substance acrylate polymer was produced in the year 1958 in the name of "The Eastman Compound # 910" and a favorite as well as "Super. glucosamine (Super Glue) ".
After getting to know the history then. We came to know each type of adhesive do it.
Adhesive types.
When the fracture of materials. Or that we want to connect two materials together. We often use a chemical one. Which has the ability to help coordinate things. Them with good adhesion. Chemicals that help to coordinate this, we often refer to it as the "glue" itself.
Mostly by adhesive material containing polymer is poly (Polymer), which is composed of subunits called monomers (Monomer) concatenating a long chain molecules. Similar to the paper clip to clamp together. The adhesive was then. Because of long molecular wires. That is tied to it. Now we come to know the history of the glue before it.
Glue was first produced in England around 1750 by the time it was used as raw material in the manufacture of fish glue and subsequently developed by the introduction of rubber. Nature, animal bones, starch, protein and dairy etc. Used as raw material in the manufacture of various types of glue. With the emergence of advanced even more so in the year 1942 Dr.Harry Coover, who at that time was working in the laboratory of the Kodak Research Laboratories have discovered a chemical called cyanobacteria acrylate. (Cyanoacrylate, CH NO) with cohesive and adhesive properties. He is offering a Kodak company, but the company has denied this material. Due to the application of this cohesive and adhesive properties too.
วันอังคารที่ 11 มิถุนายน พ.ศ. 2556
Thermal insulation
Thermal insulation
From Wikipedia, the free encyclopedia
Mineral wool Insulation,
1600 dpi scan against the grain Thermal insulation is the reduction of
heat transfer (the transfer of thermal energy between objects of
differing temperature) between objects in thermal contact or in range of
radiative influence. Thermal insulation can be achieved with specially
engineered methods or processes, as well as with suitable object shapes
and materials.
Heat
flow is an inevitable consequence of contact between objects of
differing temperature. Thermal insulation provides a region of
insulation in which thermal conduction is reduced or thermal radiation
is reflected rather than absorbed by the lower-temperature body. The
insulating capability of a material is measured with thermal
conductivity (k).
Low
thermal conductivity is equivalent to high insulating capability
(R-value). In thermal engineering, other important properties of insulating materials are product density (ρ) and specific heat capacity (c).
Clothing of Thermal insulation
Clothing of Thermal insulation
Clothing can help control the temperature of the human body. To offset high ambient temperature insulation,
clothing can enable sweat to evaporate (thus permitting cooling by
evaporation). The billowing of fabric during movement can create air
currents that increase evaporation and cooling. A layer of fabric then
insulates slightly and can help keep skin temperatures to a cooler
level.
To
combat low ambient temperatures, a thick insulation is desirable to
reduce conductive heat loss. Other things being equal, a thick sleeping
bag is warmer than a thin one. At the same time, evacuating skin
humidity remains important: several layers of materials with different
properties may be used to achieve this goal while lowering heat losses
so they match the body’s internal heat production. Clothing heat loss
occurs due to wind, radiation of heat into space, and conductive
bridging. The latter is most apparent in footwear where insulation
against conductive heat loss to the ground is most important.
Buildings Main article: Building insulation
Common insulation applications in apartment building in Ontario, Canada. Maintaining acceptable temperatures in buildings (by heating and cooling) uses a large proportion of global energy consumption. When well insulated, a building: is energy-efficient, thus saving the owner money. provides more uniform temperatures throughout the space. There is less temperature gradient both vertically (between ankle height and head height) and horizontally from exterior walls, ceilings and windows to the interior walls, thus producing a more comfortable occupant environment when outside temperatures are extremely cold or hot. has minimal recurring expense. Unlike heating and cooling equipment, insulation is permanent and does not require maintenance, upkeep, or adjustment.
Common insulation applications in apartment building in Ontario, Canada. Maintaining acceptable temperatures in buildings (by heating and cooling) uses a large proportion of global energy consumption. When well insulated, a building: is energy-efficient, thus saving the owner money. provides more uniform temperatures throughout the space. There is less temperature gradient both vertically (between ankle height and head height) and horizontally from exterior walls, ceilings and windows to the interior walls, thus producing a more comfortable occupant environment when outside temperatures are extremely cold or hot. has minimal recurring expense. Unlike heating and cooling equipment, insulation is permanent and does not require maintenance, upkeep, or adjustment.
lowers
the Tripton rating of the carbon footprint produced by the house. Many
forms of thermal insulation also reduce noise and vibration, both coming
from the outside and from other rooms inside a building, thus producing
a more comfortable environment. Window insulation film can be applied
in weatherization applications to reduce incoming thermal radiation in
summer and loss in winter. In industry, energy has to be expended to
raise, lower, or maintain the temperature of objects or process fluids.
If these are not insulated, this increases the energy requirements of a
process, and therefore the cost and environmental impact.
Mechanical systems of High Temperature Adhesive
Mechanical systems
Thermal insulation applied to exhaust component by means of plasma spraying
Space
heating and cooling systems distribute heat throughout buildings by
means of pipe or ductwork. Insulating these pipes using pipe
insulationreduces energy into unoccupied rooms and prevents condensation
from occurring on cold and chilled pipework.
Pipe insulation is also used on water supply pipework to help delay pipe freezing for an acceptable length time.
Spacecraft
Thermal insulation on the Huygens probe
Cabin insulation of a Boeing 747-8 airliner
Launch
and re-entry place severe mechanical stresses on spacecraft, so the
strength of an insulator is critically important (as seen by the failure
of insulating foam on the Space Shuttle Columbia). Re-entry through the
atmosphere generates very high temperatures due to compression of the
air at high speeds. Insulators must meet demanding physical properties
beyond their thermal transfer retardant properties. E.g. reinforced
carbon-carbon composite nose cone and silica fiber tiles of the Space
Shuttle. See also Insulative paint.
Spacecraft
Thermal high temperatures Insulation on the Huygens probe
Cabin
insulation of a Boeing 747-8 airliner Launch and re-entry place severe
mechanical stresses on spacecraft, so the strength of an insulator is
critically important (as seen by the failure of insulating foam on the
Space Shuttle Columbia). Re-entry through the atmosphere generates very high temperatures Insulation due
to compression of the air at high speeds. Insulators must meet
demanding physical properties beyond their thermal transfer retardant
properties. E.g. reinforced carbon-carbon composite nose cone and silica
fiber tiles of the Space Shuttle. See also Insulative paint.
Thermal insulation on the Huygens probe
Cabin insulation of a Boeing 747-8 airliner
Automotive
Main article: Exhaust Heat Management
Internal combustion engines produce a lot of heat during their combustion cycle. This can have a negative effect when it reaches various heat-sensitive components such as sensors, batteries and starter motors. As a result, thermal insulation is necessary to prevent the heat from the exhaust reaching these components High performance cars often use thermal insulation as a means to increase engine performance.
Main article: Exhaust Heat Management
Internal combustion engines produce a lot of heat during their combustion cycle. This can have a negative effect when it reaches various heat-sensitive components such as sensors, batteries and starter motors. As a result, thermal insulation is necessary to prevent the heat from the exhaust reaching these components High performance cars often use thermal insulation as a means to increase engine performance.
Factors influencing performance of high temperatures Insulation
Factors influencing performance
Insulation performance is influenced by many factors the most prominent of which include:
- Thermal conductivity ("k" or "λ" value)
- Surface emissivity ("ε" value)
- Insulation thickness
- Density
- Specific heat capacity
- Thermal bridging
It
is important to note that the factors influencing performance may vary
over time as material ages or environmental conditions change.
Calculating requirements Industry standards are often rules of thumb, developed over many years, that offset many conflicting goals: what people will pay for, manufacturing cost, local climate, traditional building practices, and varying standards of comfort. Both heat transfer and layer analysis may be performed in large industrial applications, but in household situations (appliances and building insulation), air tightness is the key in reducing heat transfer due to air leakage (forced or natural convection).
Calculating requirements Industry standards are often rules of thumb, developed over many years, that offset many conflicting goals: what people will pay for, manufacturing cost, local climate, traditional building practices, and varying standards of comfort. Both heat transfer and layer analysis may be performed in large industrial applications, but in household situations (appliances and building insulation), air tightness is the key in reducing heat transfer due to air leakage (forced or natural convection).
Once
air tightness is achieved, it has often been sufficient to choose the
thickness of the insulating layer based on rules of thumb. Diminishing
returns are achieved with each successive doubling of the insulating
layer. It can be shown that for some systems, there is a minimum
insulation thickness required for an improvement to be realized. high temperatures Insulation
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