The demand for pressure sensitive adhesives (PSAs) is on the rise due to their incredible versatility, flexible open times, and varying degrees of tack. Designed for both permanent and removable applications, PSAs adhere to a surface when light pressure is applied, with no need for solvents, water, or heat to activate the adhesion. Unlike liquid adhesives, PSAs do not require any setup or curing time, saving business’s valuable time.
Hot Melt Pressure Sensitive Adhesives
Hot Melt Pressure Sensitive Adhesives (HMPSAs) are well known for their exceptional performance and efficiency in a wide range of industrial applications and consumer products due to their ability to move or flow without heat. Although solid at room temperature, HMPSAs are capable of cold flow under a light finger pressure at room temperature, providing free-flowing liquids that can be dispensed rapidly and precisely to the target bonding site. Hot melt adhesives remain permanently sticky, which allows for excellent adhesion even after the glue has cooled. Upon cooling, HMPSAs solidify to form strong bonds between surfaces.
Hot Melt Characteristics:
Types of Hot Melt PSAs:
Band-It Idex offers one of the most complete lines of municipal clamping systems for indoor and outdoor traffic management applications. With operations ranging from sign, traffic signal, traffic monitoring, motion sensor and security camera installation, the diverse range of engineered fastening solutions offered by Band-It satisfies the need for both temporary and permanent strapping products that can withstand the even the harshest elements. Manufactured from stainless 201, 316, 0r 317 and specialty steels, the corrosion and UV resistance of Band-It’s broad product selection provides a reliable and durable option for fast, easy installation.
Environmental temperature fluctuations, referred to as thermal cycling, can bring about the thermal expansion and contraction of materials placed within the ambient environment, along with changes to the properties of the material itself. In especially harsh environments, these temperature fluctuations can be extreme and occur at high rates of change. In general, this environmental stress can impact a product or system’s reliability and, for systems composed of hoses, leaks are one of the leading causes of the failure as connecting elements often endure the worse stress in fluid systems. Hose fittings have to maintain a fully sealed system at all required pressures, temperatures and mechanical shocks. When the cyclical heating and cooling of a hose occurs, both the hose’s volume and material properties can change and alter the complex compression and friction interface. For example, elastomers found within the cover and inner tube of rubber hoses can become less deformable at lower temperatures; alternatively, hoses exposed to high temperatures can expand. Changes, such as these, can cause clamps to loosen over time.
In harsh environments where leaks and failures want to be prevented, Ideal Tridon SmartSeal Spring Clamps offer a reliable solution. Ideal Tridon SmartSeal Spring Clamps form a unique 360 degree seal encompassing the entire hose circumference. Guarding against both pressure and temperature changes, leak paths for both fluid and air are eliminated around all portions of the clamp as a constant and steady pressure is maintained all around the connection. The Ideal Tridon SmartSeal Spring Clamp is comprised of two primary parts, the clamp assembly and SmartLiner. The SmartLiner expands and contracts around the hose with temperature change. The clamp rides on top of the lubricated liner, distributing pressure more evenly around the hose. Leak pressure tests indicate that SmartSeal Clamps perform better in thermal cycling than typical constant tension clamps and last longer even in the most demanding environments.
The Science Behind Solvents:
In order to better understand the difference between solvent and “non solvent”, or aqueous-based, hand cleaners, it is important to have a rudimentary understanding of the underlying chemical principles of each. In it’s simpliest form, a solvent is a substance that is able to dissolve another substance, whereas the solute is the substance being dissolved. When solvents and solutes of the same kind are mixed together and distributed evenly you get a solution; the keyword here being ‘same‘. In chemistry, molecules are distinguished as polar or non-polar depending on their electrical or magnetic properties. Polar molecules attract other polar molecules and repel the non-polar ones. Technically, water is a solvent because virtually anything can be dissolved in it. However, due to it’s positive and negative charge, water is classified as a polar molecule. On the other hand, oil is not. As a general rule, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes. These two substances are chemically divergent and cannot absorb each other’s molecules.
What This Means For You:
What does all of this mean and what does it have to do with industrial hand cleaners you may ask? Well, the simple answer is that it has everything to do with industrial cleaners and why manufacturers have long since depended on the use of nonpolar solvents such as benzene and tetrachloroethylene to effectively remove heavy-duty contaminants such as oil and grease from hands. Such “organic” solvents, as considered by the general population, are excellent at breaking down and dissolving contaminants like oil in the cleaning solution, something that water cannot do well. However, use of these solvents over time has not been without consequence. Increasing concern over workers’ health, ozone depletion, air pollution, and safe disposal of such substances have ignited efforts to find alternatives to conventional cleaning solvents in the form of aqueous, or ‘nonsolvent’ cleaners.
Surfactants As An Alternative:
Aqueous Cleaners rely on a blend of ingredients designed to enhance the cleaning ability of water. Known as surfactants, these additives may act as detergents, wetting agents, emulsifiers, foaming agents and dispersants, reducing the surface tension of a liquid in which it is dissolved. Surfactants help water get “wetter” lifting dirt and oil away from the skin’s surface and surrounding it with water so that it can be washed away. Traditionally, water-based detergents have been viewed as a less effective solution to their solvent-based counterparts, but the development of products such as Greven Active Force MP, MP-ECO, and Blue Wash are quickly putting this theory to the test. In addition to being safe for workers, these ‘nonsolvent’ cleaners are biodegradable, contain no crude odors, and perform as well, if not better, than their competition proving that indeed social responsibility and effectiveness can go hand in hand.
New standards put forth by the Occupational Safety and Health Administration (OSHA) are underway and will soon help provide better protection for workers exposed to crystalline silica in construction, maritime and general industry. Crystalline Silica, a common mineral identified in the earth’s crust, can be found in a variety of materials including concrete, sand, stone and mortar. When broken down into very small particles through cutting, sawing, sanding, grinding, or drilling, crystalline silica can pose a very serious health threat to workers who inhale this dust. As it is known, respirable crystalline silica puts workers who inhale these microscopic particles at an increased risk for developing serious silica-related diseases including lung cancer, chronic obstructive pulmonary disease, kidney disease and silicosis, an incurable lung disease that may lead to disability or death. It is estimated that approximately 2.3 million people in the U.S. are exposed to silica at work. By reducing the Permissible Exposure Limit (PEL) to 50 micrograms of respirable crystalline silica per cubic meter of air, OSHA hopes to save over 600 lives and prevent more than 900 new cases of silicosis each year. Averaged over an 8 hour day, the new PEL is half the previous limit for maritime and general industry and five times lower than the previous limit for construction. Under these new rules, the air employees breathe must be regularly sampled and analyzed to ensure that exposure levels do not exceed these limits. However, employers in the construction industry who are fully and properly implementing the engineering controls, work practices, and respiratory protections as specified by OSHA in Table 1 (a flexible compliance option for the construction industry), are not required to comply with the air sample measurement requirements as noted above.
In addition to the lower PEL levels and air sample provisions detailed in these new OSHA regulations, the new standards require both general industry and maritime employers to have a written exposure control plan in place as well as engineering and work practice control procedures.
Written Exposure Control Plans Must Include:
In support of the delivery and compliance of these new regulations, OSHA has outlined the following engineering control and work practice recommendations for maintaining the designated PEL levels in affected work environments:
The roll-out of these new standards will occur over a 4 year time period which began on September 23, 2017 for operations in the construction industry. Subsequently, the following compliance dates should be noted and every effort should be made to ensure that appropriate measures are in place to comply with these regulations by the dates listed below.
For all operations in general industry and maritime, other than hydraulic fracturing operations in the oil and gas industry:
For hydraulic fracturing operations in the oil and gas industry:
For additional resources and compliance assistance, please visit OSHA’s Crystalline Silica Rulemaking page. On-site consultation is available at no charge to small and mid-sized businesses interested in getting a jump-start on these standards.
The National Association of Lubricating Grease Manufacturers, Inc. (NLGI) is a not-for-profit association composed of companies who primarily manufacture and market various types of lubricating grease. The objectives of the NLGI are to disseminate information that can lead to the development of better lubricating greases for the consumer and to provide better grease lubrication engineering service to the industry.
The NLGI consistency number expresses a measure of the relative hardness of a grease used for lubrication, but is only one factor in determining suitability of a grease to a specific application. The consistency of grease (its ability to resist deformation by an applied force) is controlled by the thickener concentration, thickener type and the viscosity of the base oil. NLGI’s classification defines nine grades, as shown below; each correlated to a range of ASTM worked penetration values, measured using two test apparatus. The first apparatus consists of a closed container and piston-like plunger that is perforated to allow grease to flow from one side to the other as the plunger is moved up and down. The test grease, with a constant temperature of 25 degrees Celsius, is inserted into the container and stroked 60 times before being moved to a penetration test apparatus. This apparatus consists of a container, specially configured cone and dial indicator that, once filled, is smoothed over. With the cone’s tip touching the grease’s surface and the dial indicator set to zero, the test begins. Over a specified period of time, the weight of the cone will cause it to penetrate the grease, after which time, the depth of penetration is measured.
High consistency greases, as indicated by higher NLGI numbers, are recommended for use in high ambient or operating temperatures when bleeds or leaks are of concern. These greases are firmer and tend to stay in place and may be used on high-speed ball/roller bearings, with low-viscosity base oil, or on low-speed journal bearings. Lubricants with a lower consistency, or NLGI number, are suggested for cold temperature operations on low-speed rolling element bearings, with high viscosity. A common mistake when selecting a grease is to confuse the grease consistency with the base oil viscosity. It’s important to remember that that both speed and load help determine the appropriate viscosity required for application. Even though base oil viscosity affects consistency, it is possible for a grease to have a high consistency and low base oil viscosity or vice versa.
Companies, such as Schaeffer Oil are helping make NLGI consistency identification simple through the use of color-coded caps on their high-temperature, waterproof, synthetic and high- pressure greases. Available in a variety of grades to suite the unique application requirements of its users, Schaeffer Lubricants feature black, white, red, yellow and clear tops that correlate directly to NLGI consistency numbers. Understanding these differences and knowing which cap to look for, will help make choosing the right grease look easy.
NLGI #00 – Schaeffer Black Cap
NLGI #0 – Schaeffer White Cap
NLGI #1 – Schaeffer Red Cap
NLGI #2 – Schaeffer Yellow Cap
NLGI #3 – Schaeffer Clear Cap
With global population growth expected to reach an estimated 9.7 billion by 2050, how worldwide food production may be augmented to meet the needs of an expanding international community continues to be a hot topic of discussion among agricultural field experts. The process of identifying alternative methods for plant production that are adequate and economically viable, without significantly raising public food costs, is an ongoing challenge for today’s farmers. To date, the use of pesticides has remained the predominant method for preserving and ensuring the evolution of the world’s food supply due to their overall effectiveness and affordability. However, despite the success of a wide range of pesticides that include insecticides, herbicides and fungicides, plants still exhibit many natural barriers that directly affect the retention, entry and transport of these substances. The main barrier to pesticide movement into the plant is a waxy layer, called the cuticle, which covers the entire plant surface and serves to prevent water loss. As a result, pesticides applied to the leaves of plants generally face greater obstacles than those applied to soil. In an effort to combat these barriers, specialized additives, referred to as surfactants, may be added to spray solutions to improve the emulsifying, spreading, sticking and absorbing properties of liquids. Pesticides formulated or applied with surfactants reduce surface tension within the external surface layers of water and allow for more effective movement of the pesticide through the cuticle.
Surfactants At Work:
Surfactants (aka: surface-active agents) can be classified into 4 primary classes including non-ionic, anionic, cationic and amphoteric that differ according to the electrical charge on the hydrophilic (“water-loving”) end of the molecule. As a general rule, non-ionic surfactants are the safest to use and the most versatile, accounting for nearly 50% of surfactant production. Due to their lack of an electrical charge, non-ionic surfactants can be used with any product because there are no positive or negative ions to react with the active chemical with which they are being mixed. By reducing the surface tension of the spray solution, surfactants flatten the water droplets, thus spreading the pesticide on the leaf surface. This allows more surface area for the chemical to come in contact with the leaf, allowing chemicals to saturate plant leaves instead of beading up and running off. Products such as Schaeffer Wet-Sol also help increase nutrient uptake in soil by increasing mass flow. Soil becomes hydrophobic and water repelling when organic coatings from decomposing matter such as roots and shoots build up on soil particles, causing water to repel from its surface. Such water run-off in the top inch of the soil profile can leave behind localized dry spots and result in the uneven penetration of water throughout the soil. Soil surfactants act as a bridge between the organic coatings and water to help aid in its penetration and retention, allowing for a more even distribution of water and nutrients.
Make The Most Of What You’ve Got:
Variations in plant species such as wax content and composition, leaf arrangement and architecture, and plant hairs, are among the various features that can affect the overall performance of surfactants. To optimize the performance benefits of these specialized additives, surfactant solubility should complement the solubility characteristics of the selected pesticide. In other words, both the surfactant and pesticide should be oil-soluble or water-soluble. Additionally, environmental conditions should not be overlooked, as plant cuticles are generally thicker and harder to penetrate under low humidity conditions while thin, relatively permeable cuticles are favored by high humidity and high moisture conditions.
Reap What You Sow:
Without a doubt, the science of surfactant technology has increased the effectiveness of pesticides. However, caution must be taken to ensure that the proper surfactants are selected, as damage to plants can occur when not utilized properly. Be sure to read labels carefully. When applied at too high a rate, there is an increased risk of toxicity to the plant’s leaves and roots as well as potential membrane permeability damage. When used as directed, however, non-ionic surfactants provide a safe, stable and highly effective solution for farmers seeking to meet the nutritional demands of an ever-growing population.
When it comes to choosing an adhesive or sealant for your specific application, the task can seem overwhelming with so many different products on the market today. Although the two terms are sometimes used interchangeably, there are some critical differences that should be noted before making your selection. In this article, we will discuss the specific properties of both and their unique applications to confidently equip you with the information you need to grant your “seal of approval” and stick with it!
Sealants are designed to eliminate gaps between surfaces and prevent things like dust or dirt from getting in. Due to the tight molecular structure of sealants, they are particularly effective in keeping moisture in or out of the components in which they are used. With a paste-like consistency that allows filling of gaps between substrates and minimal shrinkage after application, sealants contain fast-drying resins and epoxies that form a slick finish. Despite not having great strength, they provide thermal and acoustical insulation and may serve as fire barriers. Also used for smoothing or filleting, sealants are generally malleable and have high elongation when compared to adhesives. Commonly applied with a caulking gun or specialized applicator, multi-component sealants are composed of a base and applicator component. The activator is typically added to the base component and mixed for a set period of time before application. Single-component sealants, on the other hand, are commonly packaged in a cartridge and require no mixing or special equipment for application.
Sealant Types and Usage
Sealants are often used in joints between individual stone or metal panels, between stone panels and flashing, at expansion and coping joints in masonry, around window and door openings, and in joints at horizontal surfaces. The most common types of joint sealants include acrylics, silicones, polyurethanes, polysulfides, latex and butyls.
Adhesives are designed to permanently bind one surface to another, serving as a sort of “industrial glue” for a variety of applications. Although adhesives are more rigid, durable and powerful than sealants, they can be nearly impossible to remove. Generally comprised of more complex structures engineered to grip and bind on a cellular level, they require a better adhesion to surfaces in order for them to hold properly. Consequently, the surface must be thoroughly cleaned and/or specially treated to ensure a secure and long-lasting bond. Available in spray and paint formulas, adhesives will not always dry properly when used on an exterior surface.
Adhesive Types and Usage
Metal antiques, not unlike people, tend to get a bit rusty with age. Aside from the aesthetic repercussions of the aging process, rust, when left unchecked, will eventually eat away at metal. Such degradation results in an overall loss of value and quality, eventually destroying the item beyond repair. Rust, simply put, is the direct outcome of the mixing of iron, oxygen and water from the air. When iron and oxygen combine, the iron loses electrons to oxygen atoms. This transaction is referred to as oxidation and results in the production of a chemical reaction that forms Fe203 Iron Oxide, more commonly known as rust. Consequently, antiques that are left outside or exposed to high humidity levels and/or heavy water exposure are at particular risk for the formation of this by-product. Until recently, rust removal necessitated the use of harsh chemical solvents that, while effective at removing rust, often compromised the integrity of paint on precious metals, as well as the health and safety of its users. However, thanks to the innovative advancements of companies such as Archoil, aging gracefully has never been so easy or so effective. Archoil 5100 works through a process called chelation in which a large synthetic molecule forms a strong bond with metal oxides (rust), but not with the host metal, pulling rust from both ferrous and non-ferrous metals without harming paint. Fast-acting, non-acidic and non-toxic, Archoil Rust Remover Concentrate can operate in temperatures spanning from 65-160 degrees Fahrenheit, but it is worthwhile noting that increases in temperature also decrease the amount of time needed to remove oxidation, especially on heavily rusted metals. To use, simply dilute 1 part AR5100 in 16 parts water and immerse item in the diluted solution, allowing it to soak until all of the oxidation has been removed. Unlike other products on the market today, AR5100 will not form a patina or convert the rust to a new material. With Archoil 5100 Rust Remover Concentrate making old things look like new has never been easier!
Animal identification serves as the foundation for maintaining accurate production records of herds and flocks, tracking animal growth, managing treatment records and movement, as well as providing proof of ownership to individuals. Perhaps even more valuable, though, is the critical role a successful identification system plays in global trade, endangered species tracking, emergency management, food safety and disease eradication. In the case of a disease outbreak, the ability to identify farm animals provides farmers and veterinarians with a means to track those animals that are sold or transported to other farms or processing facilities. Such traceability plays a crucial part in helping secure the safety of our food supply, as it provides a way to determine each animal’s unique path and helps pinpoint livestock that may have been exposed to a disease through direct contact with an infected animal. Because some animal diseases also have human health implications, it is essential to properly identify animals to help prevent and eradicate diseases. Throughout this article we will take a look at both permanent and temporary methods of livestock identification, providing you with the information necessary to help educate and guide your decisions when it comes to the long-term care of your livestock and you.
Permanent Forms of Identification:
Temporary Forms of Identification:
Although there is not a “one-size-fits-all” solution for every situation, the importance of selecting an identification method that suits the needs and expected uses of your animal can not be disputed. When used in the correct manner, and under the appropriate conditions, each method will go a long way in supporting the rapid traceability of animals in an emergency response situation while also preserving product integrity and allowing producers to maintain accurate management records.