Temakrom | additives - compound - masterbatch
Temakrom | additives - compound - masterbatch
DESCRIPTION
TEMAD STATIC UNI is a synergic combination designed to avoid electrostatic charges accumulation, lowering surface resistivity without damages for the colour. There are two major types of antistatic additives: Antistatic for the process and Antistatic for the product.
Antistatic additives for the process have the purpose of reducing the accumulation of electrostatic charges during the production process. Antistatic additives for the product, on the other hand, have the function of reducing the attraction of dust from the final product due to electrostatic charges generated by rubbing, especially in the presence of dry weather. The active ingredient used is chosen according to the characteristics it must fulfill and differs by migration typology. Fast migration: the antistatic additive rises to the surface very quickly, but wears out quickly; average duration is equal to 1/2 months. Slow migration: the antistatic additive rises to the surface very slowly, but keeps up a medium to long term antistatic action; average duration is up to 6 months. The duration of antistatic additives, however, depends on how much the finished products that contain them have been handled: the more they are handled the more the antistatic effects are lost.
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DESCRIPTION
Product coding is today considered an integral part of the production process. In addition to the expiration date, the products shows lot numbers, real-time production date, barcodes or other information.
For this kind of application we present TEMAD LASERMARK, the additive allows you making your products laser-markable.
Laser marking is based on a chemical reaction able to modify the color of the material hit by the laser beam. This practice makes it possible to "trace" the product according to the needs, guaranteeing the consumer a safety measurement system in the purchase and the manufacturer a simple identification of any non-compliant production batches.
It also has a number of advantages compared to other coding systems. First and foremost the economic one, for the absence of consumables and maintenance that leads to considerable decrease in downtime, as well as the positive aspects deriving from full environmental compatibility and the possibility of being used on many substrates and materials.
DESCRIPTION
There are many differences among the antimicrobials on the market. The main classification of them is between organic and inorganic antimicrobials. Among the organic ones, one the most popular is the triclosan (2,4,4’-Trichloro-2’-hydroxydiphenyl ether), while among the inorganic ones the most common are those silver-based as our TEMAD ANTIBACT. Both triclosan and silver-based antimicrobials are effective against many kind of microorganisms. In particular the triclosan is less effective against negative grams (one of the two classes in which bacteriums are divided, the other one is that of positive grams). It is also little or not at all effective against pseudomonas bacteriums, which are particularly found in all the parts in contact with water. Silver-based antibacterials are effective both against positive and negative grams, pseudomonas included. TEMAD ANTIBACT doesn’t migrate but releases silver ions through a mechanism based on the law of ionic exchange. The ionic exchange stops when the balance point is reached, so that the yield of the product can be improved and extended at its best. TEMAD ANTIBACT can be used with all kind of thermoplastic resin.
DESCRIPTION
TEMAD ANTIOX has been studied to protect the resins from the thermo-oxidative action during the critical phases of the production processes. Its protective function is essential when the transformation needs require the use of particularly high temperatures. Antioxidant additives act also long-term, preserving the characteristics of the finished product. During the production process, heating polymers creates free radicals that modify the chemical structure of the resins by generating gels and changing the length of polymer chains, resulting in loss and/or deterioration of their mechanical characteristics (change of MFI, worsening of gloss) and of their aesthetic properties, including discoloration.
DESCRIPTION
TEMAD PROC-SET function is to remove the moisture present in the material and at the same time facilitate the production process, eliminating the polymer pre-drying phase. It is particularly indicated in the thermoplastic film sector as it stabilizes the bubble and gives a pleasant surface appearance, as it prevents the formation of partridge or fish eyes.
DESCRIPTION
All plastic materials have a problem: they are combustible and highly flammable. Therefore, the research comes to the rescue creating additives, called flame retardants, able to make the self-extinguishing resin. Temakrom srl, through its NCU-TEC division, makes available a series of flame retardants, which according to their chemical nature react through different mechanisms of actions such as:
- Gas development
- Intumescence
- Fusion (it absorbs heat that feeds flame)
- Action on chemical reaction (slows down speed)
DESCRIPTION
The detection of foreign bodies during food processing and packaging phases plays a fundamental role in ensuring safety and quality, avoiding product contamination. The Temad Detek TT, dispersed homogeneously and mixed with the raw material, acts so that, if some fragment of plastic material ends up in the product during the processing or packaging phase, these would be immediately identified by a metal detector.
Temad Detek TT is extremely versatile: it can be used in different production processes - such as injection molding, extrusion and blow molding - and it is compatible with various types of polymers, such as LDPE, HDPE, PP, PS and MABS.
WAY TO USE
TEMAD ANTIUV should be used as follows: The percentages of use of these products vary according to the requested stability to light, expressed in kly, and to their geographical area of exposure.
WARNING: The data shown in the technical data sheet are based on the current level of our knowledge and their purpose is purely indicative. They are not in any way intended to guarantee (Article - CC) specific properties of the product and its suitability for a given application. It is exclusive responsibility of the purchaser to verify the characteristics shown in the technical data sheet and their validity on the finished product.
DESCRIPTION
TEMAD ESPANSOR has a strong expanding action. The blowing agents are used in the field of injection molding, extrusion of flexible film, extrusion of monofilaments, etc., and are aimed at reducing the weight of the product. Expanding agents are divided into the categories provided: Exothermic and Endothermic.
The exothermic expanders generate heat and mainly nitrogen during the expansion phase.
The gases developed by the expanding agents diffuse inside the melted polymeric matrix forming some inside the material which accepts the lightening of the piece at the same volume. TEMAD ESPANSOR also improves the suction and filling phenomena of the mold. Sucking is a phenomenon that occurs during the molding phase due to the incomplete filling of the mold; as a consequence the printed product appears "empty". To solve this type of problem, expanding agents are used which, by releasing gas inside the mold, compress the molten material, homogeneously favoring its filling. The use of these masters reduces the mechanical characteristics of the product.
DESCRIPTION
TEMAD IR FILTER is born from the continuous research of innovative additives able to solve problems related to plastic materials. This additive has the specific characteristic of filtering the IR rays which, as known, transmit the heat. Elimination of IR , is necessary especially in the presence of display cases, tarpaulins, covers or transparent panels to protect environments, offices, greenhouses, partitions and coverings of various kinds, where there is a need to pass the light and avoid overheating of the interior rooms. The addition of the additive to the transparent resin, gives it the property of filtering the infrared rays with a percentage that varies between 35% and 62% depending on the geometry and thickness. TEMAD IR FILTER allows the use of transparent resins for the most varied applications, ensuring protection from heat and ensuring excellent transparency of the final product.
DESCRIPTION
Temad Vida SL has been specifically designed to be effective against Coronavirus -nCov. Temad Vida SL has an exclusive broad-spectrum formulation: it oxidizes basic structures, such as proteins, damaging them in a vast and irreversible way and thus deactivating / destroying the microorganism. Independent tests have shown the product is able to effectively and completely kill human Coronavirus rapidly. Temad Vida SL meets the requirements specified in the protocol, as required by the US EPA (Environmental Protection Agency).
No other virucidal additive offers such a powerful composition or broad portfolio of performance. Its effectiveness is tested on over 100 strains of virus in 22 viral families, 400 strains of bacteria, over 60 strains of fungi and yeast.
Temad Vida SL is perfectly compatible with all types of thermoplastic resins and it is suitable for the main types of processing (molding, extrusion, film, blowing).
The Essential Guide to Food Safe 3D Printing - Formlabs
What Does Food Safe Really Mean?
To begin, it’s important to clarify a few key terms:
- Food grade means that the material is either safe for human consumption or permitted to come in contact with food.
- Food safe means that a food grade material meets the requirements determined by the intended use and will not create a food-safety hazard.
- Food contact surfaces include any surface that may come into direct contact with food. These surfaces must be made of nontoxic materials and designed to withstand the environment of their intended use, including exposure to cleaning compounds, sanitizing agents, and cleaning procedures.
Food grading and food safety concern a specific way to ingest parts, called migration. Particles as small as a few nanometers and up to several hundred nanometers may get transferred each time various materials encounter with each other, for example from components of the industrial 3D printer to the 3D printed object, and from the object to the food.
Because migration levels are very low on occasional contact, food grading typically concerns items that are in prolonged contact with food such as containers, straws, utensils, plates, and food molds. Different testing institutions will adhere to different government-imposed risk tolerances and approved substances, which for the US is described by the FDA CFR 21 and for the EU in guidelines 10/.
Look for these labels indicating FDA and EU approval. Beware that a material being ‘compliant with’ doesn’t mean that it is explicitly approved by the institutions, so always check the technical datasheets for a certificate.
To be considered food safe according to the FDA Food Code, a material has to meet the following requirements:
- No migration of deleterious substances
- Does not impart colors, odors, or tastes
- Safe under normal use conditions
- Durable, corrosion-resistant, and nonabsorbent
- Sufficient in weight to withstand repeated washing
- Finished to have a smooth, easily cleanable surface without breaks and sharp internal angles
- Resistant to pitting, chipping, crazing, scratching, scoring, distortion, and decomposition
- Accessible to inspection
Any FDA or EU approved material includes not only the raw polymer but also the additives or masterbatch. These might contain components such as plasticizers, impact and heat distortion modifiers, UV-stabilizers, flame retardants, anti-fouling, anti-static, anti-slip, foaming and clarifying agents, anti-oxidants, aromatic nucleators, carbon alloys, phosphorescents, fillers, thickeners, chain extenders, metal deactivators, dyes, and a carrier resin.
General Food Safe 3D Printing Considerations
Bacteria Buildup
A 3D printed part can turn into a petri dish squirming with bacteria within weeks. Even though some materials will survive the dishwasher, so will dangerous bacteria such as E. coli and salmonella that live in the little nooks and crannies. Some toxic molds find favorable growth conditions on several types of plastic and are hard to remove. Neither cleaning with bleach nor microwaving your polymers is an option for eliminating germs.
While bacteria buildup might not be an issue for disposable items, if you’re planning to create a part for long-term use, using a food safe coating is highly recommended.
Food Safe Coatings and Sealants
The best option to reduce the risk of particle migration and bacteria buildup is by dip coating the 3D printed parts with a food grade epoxy or polyurethane resin, such as Masterbond’s EP42HT-2FG or ArtResin or an FDA approved PTFE (known as Teflon®) to seal their surface.
However, note that coating also doesn’t guarantee food safety for prolonged use as not all of these coatings are dishwasher safe, and they may degrade over time, exposing the original, potentially non-safe surface.
Dishwasher Safety
Most 3D printing materials have a low heat deflection temperature (HDT), which means that the 3D printed parts might become brittle and crack, or deform and warp at elevated temperatures. If you’re planning to clean a 3D printed part in a dishwasher, make sure to double check that the material is dishwasher safe and if there are any specific recommendations for washing temperature.
Food Safe Equipment
As particles might migrate from components of a 3D printer to 3D printed parts, it is crucial that any components that might come in contact with the 3D printing material or the part are food grade and do not contain or leach harmful chemicals.
This includes taking precautions when using multiple materials, as some materials previously used in the 3D printer might have contained toxic particles and made contact with some components.
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Food Safe 3D Printing Materials
Many 3D printing materials are not food safe and might contain toxic chemicals. Only use materials to 3D print parts intended for food contact that are certified for food safety.
Food Contact Time
As may be expected, the risk of migration is higher if the food is exposed to the 3D printed part for an extended time period. In general, try to limit food contact time and take further precautions for parts that will be in contact with food for longer periods of time.
Using 3D Printing to Create Food Contact Items
Think about the reason why you’d like to use 3D printing for a food contact item. If it’s to create custom shapes and forms, in most cases, there are indirect ways to use 3D printing to create these custom parts, for example with molding. See an example in the next section.
Food Safe 3D Printing With Stereolithography (SLA)
SLA 3D printing uses a laser to cure liquid resin into hardened plastic in a process called photopolymerization, resulting in parts that have the highest resolution and accuracy, the clearest details, and the smoothest surface finish of all plastic 3D printing technologies.
Is resin food safe? The answer is no. Substances may migrate from SLA parts which makes none of the resins and printed parts food safe by default. While some resins for dental and medical applications are certified biocompatible, that doesn’t mean that they’re food safe. These materials are certified for specific applications and should not be used for food contact products.
SLA parts have a smooth surface finish that makes it easier to use coatings to seal their surface and prevent the buildup of bacteria. The factors which affect the ultimate smoothness of a part include resin type, layer thickness, build orientation, mesh triangulation resolution of the 3D model, and the curing profile of the SLA resin. Printed parts require washing and post-curing according to the manufacturer's instructions before the coating is applied. However, note that coatings don’t guarantee food safety, as the coating may interact with the resin or degrade over time, exposing the original, potentially non-safe surface.
White PaperIntroduction to 3D Printing With Desktop Stereolithography (SLA)
Looking for a 3D printer to realize your 3D models in high resolution? Download our white paper to learn how SLA printing works and why it's the most popular 3D printing process for creating models with incredible details.
Download the White PaperMolds
Creating custom molds is a common way to leverage the benefits of SLA 3D printing to produce highly detailed custom parts without having the 3D printing parts come into direct contact with food. While SLA 3D prints aren’t suitable for directly molding foods, (SLA) resin 3D printers are perfect tools to create mold negatives, which can be vacuum formed using food safe plastic.
The tools and techniques for creating 3D printed food molds are easy to master, and the results are often stunning.
3D printed molds for thermoforming and silicone enabled the creation of unique shapes and designs.
Learn more about creating molds for vacuum forming in our in-depth tutorial.
Electroplating
Electroplating is the process of coating parts with metal using an electric current. The process is most commonly used for decorative purposes or to prevent corrosion by creating a durable surface.
SLA parts are ideal for electroplating due to their smooth surface finish. However, as plastics are nonconductive surfaces, SLA 3D prints have to be rendered conductive by coating with graphite, conductive lacquer, electroless plate, or a vaporized coating.
Food safe metal coatings are available, but as the process involves various chemicals, making sure that the workflow is approved for food contact is the developer’s own liability.
Ceramics
SLA 3D printing offers the unique possibility to produce ceramic parts. After 3D printing, parts can be fired in a kiln to burn out the resin and form a true ceramic part that is strong and heat-resistant. With subsequent food safe glazing, the parts will become more hygienic and resistant to most chemicals.
A variety of food safe glazes are available on the market, but make sure to follow the manufacturer’s instructions in accordance with food safety guidelines.
3D printing in ceramics is ideal for fabricating complex geometries that wouldn’t be possible by hand.
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Request a Free Sample PartFood Safe 3D Printing With Fused Deposition Modeling (FDM)
FDM is a 3D printing process that builds parts by melting and extruding thermoplastic filament, which a print nozzle deposits layer by layer in the build area.
The extruded material is circular in cross-section, which leaves very narrow crevices in between layers with a depth directly proportional to layer height. It is recommended in any case to print at the lowest feasible layer height for food safe parts.
Consequently, the main challenge with FDM parts is avoiding the buildup of bacteria. To be truly food safe in the long term, an FDM 3D print needs to have a smooth surface. Chemical smoothing with solvents like acetone, d-Limonene, or ethyl acetate removes many of the irregularities of the print resulting in a smooth, glossy appearance. However, applying a subsequent food safe coating is still highly recommended.
Layers showing on FDM (left) and SLA (right) 3D prints.
Food grade filaments do not contain any composite particles so will not wear down the nozzle into the print. Nevertheless, avoid brass nozzles that contain lead and use a dedicated stainless steel nozzle instead for all food contact items.
Always check the compatibility of your 3D printer’s components with the filament. For example, PEI is a material that is FDA compliant and offers great mechanical benefits but needs to be processed at over 300 °C, which requires a specific printer solution.
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