Welder for PROPAMETIC
Professional equipment for perfect welding - Hermetic sealing of barrier films and technical materials
HOT BAR WELDERS represent the essential professional tool for achieving perfect and airtight welds on barrier films, plastic materials and technical packaging. These devices are designed to provide hermetic sealing that completely preserves the integrity of the barrier properties of materials, so that protection from moisture and atmospheric agents remains effective over time. The robustness and reliability of these welders make them ideal for intensive use in industrial and professional environments.
The system of knurled bars heated by resistances with thermostat allows precise temperature control, maintaining constant heat necessary for optimal welding on different types of materials. This is important to achieve uniform and resistant welds, eliminating typical problems of defective sealing such as air leaks, moisture infiltration and premature breakage. The ability to work continuously without overheating makes these welders perfect for the production of covers, bags and customized packaging, with maximum productivity and consistent professional results. The investment in a quality welder translates into significant economic savings in the long term, reducing waste due to defective welds and providing maximum effectiveness of barrier protection systems.
The PROPASECARD humidity indicators represent an innovative solution for relative humidity monitoring inside packaging during transport and storage. Completely free of cobalt dichloride, they use reversible reading spots that change from blue to pink when specific humidity values from 5% to 90% are exceeded. Particularly appreciated in the electronics, pharmaceutical, military components, optical instruments and artwork sectors, they allow real-time verification of when desiccant material needs to be replaced.
Propasecard indicators are efficient ambient condition indicators, especially for humidity; they are stiff cards with reversible reading spots for relative humidity. They are available in different configurations and can be used to check the degree of humidity from 5% to 95%. Another ambient condition indicator is the temperature indicator, which is an essential system in the case of substances or materials that can become altered if exposed to specific temperatures. It indicates the temperature, if the temperature is exceeded, and the length of time it is exceeded. Lastly, the ambient condition recorder allows you to check the temperature and humidity indices and monitor the ambient conditions.
To control the humidity level it is necessary to introduce a humidity indicator inside the product packaging. There are different kind of humidity indicators cobalt-dichloride free depending on the application and need.
In the packaging field is the reduction of the dew point inside the packaging or container to eliminate humidity or guarantee preservation of qualities and properties of use of the product packed. Desiccant bag is an example of product absorbing humidity inside the packaging.
In physical chemistry absorption is the incorporation of a substance in one state into another of a different state (e.g. liquids being absorbed by a solid or gases being absorbed by a liquid).
Source: wikipedia | license
In the field of packaging protection we can use adsorbtion to define:
- the diffusion of VCI molecules inside the packaging
- the humidity attraction process from the raw material, like for example unpacked argile or silicagel
Adsorption is the adhesion of atoms, ions, biomolecules or molecules of gas, liquid, or dissolved solids to a surface.
Source: wikipedia | license
In the protective packaging sector we can speak of adsorption to define:
- the phenomenon of diffusion of VCI molecules in the packaging
- the process of moisture attraction by raw materials, such as clay or unpackaged silica gel
In the physical chemistry field, adsorption is generally a particular type of absorption that occurs only at the surface.
Source: wikipedia | license
Bentonite is a clayey mineral made of montmorillonite, calcium or sodium. In the packaging field bentonite is used as desiccant in bags of non-woven tissue to eliminate humidity inside packagings.
Propasecard humidity indicators are cobalt chloride free.
Cobalt chloride is an inorganic compound of cobalt and chlorine, with the formula CoCl2. It is usually supplied as the hexahydrate CoCl2·6H2O, which is one of the most commonly used cobalt compounds in the laboratory. The hexahydrate is deep purple in color, whereas the anhydrous form is sky blue. A blend would be mauve. Because of the ease of the hydration/dehydration reaction, and the resulting color change, cobalt chloride is used as an indicator for water in desiccants. Niche uses include its role in organic synthesis and electroplating objects with cobalt metal. It has been classified as a Substance of very high concern by the European Chemicals Agency.
Propagroup product range for humidity protection also includes a specified desiccant to be used inside container, PROPADRY.
An intermodal container or freight container is a reusable transport and storage unit for moving products and raw materials between locations or countries; the terms container or box may be used on their own within the context of shipping.
Source: wikipedia | license
A desiccant is a hygroscopic substance that induces or sustains a state of dryness (desiccation) in its local vicinity in a moderately well-sealed container. Commonly encountered pre-packaged desiccants are solids, and work through absorption or adsorption of water, or a combination of the two. Desiccants for specialized purposes may be in forms other than solid, and may work through other principles, such as chemical bonding of water molecules. Pre-packaged desiccant is most commonly used to remove excessive humidity that would normally degrade or even destroy products sensitive to moisture. Drierite, Silica gel, calcium sulfate, calcium chloride, montmorillonite clay, and molecular sieves are commonly used as desiccants.
Source: wikipedia | license
Desiccant clay is the name commonly used to define calcium bentonite (montmorillonite), a naturally occurring material that is chemically inert, non-corrosive and composed mainly of calcium and magnesium aluminum silicates.
Desiccant clay is the common name to call calcium bentonite (montmorellonite), a material of natural origin and chemically inert, non-corrosive and mainly consisting of magnesium and calcium silicate aluminium.
Humidity is a term for the amount of water vapor in air, and can refer to any one of several measurements of humidity. Formally, humid air is not "moist air" but a mixture of air and water vapor, and humidity is defined in terms of the water content of this mixture, called the Absolute humidity. In everyday usage, it commonly refers to relative humidity, expressed as a percent in weather forecasts and on household humidistats; it is so called because it measures the current absolute humidity relative to the maximum. Specific humidity is a ratio of the water vapor content of the mixture to the dry air content. The water vapor content of the mixture can be measured either as mass per volume or as a partial pressure, depending on the usage.
A molecular sieve is a material containing tiny pores of a precise and uniform size that is used as an adsorbent for gases and liquids. Molecules small enough to pass through the pores are adsorbed while larger molecules are not. It is different from a common filter in that it operates on a molecular level and traps the adsorbed substance. For instance, a water molecule may be small enough to pass through the pores while larger molecules are not, so water is forced into the pores which act as a trap for the penetrating water molecules, which are retained within the pores. Because of this, they often function as a desiccant. A molecular sieve can adsorb water up to 22% of its own weight.[1] The principle of adsorption to molecular sieve particles is somewhat similar to that of size exclusion chromatography, except that without a changing solution composition, the adsorbed product remains trapped because in the absence of other molecules able to penetrate the pore and fill the space, a vacuum would be created by desorption. Often they consist of aluminosilicate minerals, clays, porous glasses, microporous charcoals, zeolites, active carbons, or synthetic compounds that have open structures through which small molecules, such as nitrogen and water can diffuse. Molecular sieves are often utilized in the petroleum industry, especially for the purification of gas streams and in the chemistry laboratory for separating compounds and drying reaction starting materials. The mercury content of natural gas is extremely harmful to the aluminium piping and other parts of the liquefaction apparatussilica gel is used in this case. Methods for regeneration of molecular sieves include pressure change (as in oxygen concentrators), heating and purging with a carrier gas (as when used in ethanol dehydration), or heating under high vacuum. Temperatures typically used to regenerate water-adsorbed molecular sieves range from 130 °C to 250 °C
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Silica gel is most commonly encountered in everyday life as beads packed in a vapor-permeable plastic. In this form, it is used as a desiccant to control local humidity in order to avoid spoilage or degradation of some goods. Because of poisonous dopants (see below) and their very high absorption of moisture, sílica gel packets usually bear warnings for the user not to eat the contents. If consumed, the pure silica gel is unlikely to cause acute or chronic illness, but would be problematic nonetheless. Food-grade desiccant should not include any poisons which would cause long-term harm to humans if consumed in the quantities normally included with the items of food.
Source: wikipedia | license
In many items, moisture encourages the growth of mold and spoilage. Condensation may also damage other items like electronics and may speed the decomposition of chemicals, such as those in vitamin pills. Through the inclusion of silica gel packets, these items can be preserved longer.
