If your pool opens up green every spring, this post is for you. Here’s some ways to prevent a green pool opening, and be confident of a blue pool when the cover comes off. Pools open green when the winter cover is not keeping out debris, the water chemistry is poor, and there is inadequate sanitizer.
Even if you open late, and even if you have a mesh safety cover – you can skip the stains and discoloration by avoiding these problems with the pool cover and the winter water chemistry.
Install a Safety Cover
One of the most guaranteed ways to prevent a green pool opening is to install a solid safety cover without drain panels. Safety covers keep out winter air pollution, pollen, and dust by blocking rain and snow. This helps keep the water balanced and conserves chemicals.
For pools with a raised wall, for a raised spa or higher deck level, there are two ways to install a safety cover: in the wall, or over the wall. In-the-wall installations may not fit so well, and fill with leaves during winter. It’s always best to go up-and-over on pools with raised walls.
Floating solid pool covers, with water bags, can be a great cover when drained regularly and kept clean. However, they are sensitive and can tear if debris or animals scratch the surface. If you don’t maintain the cover well, a large tear can develop and spill contaminated matter into your pool.
Maintain Winter Water Balance
If you close your pool clean, with balanced water, and a winter kit, you can expect those chemicals to last about 5 months.
For pools that open green each year, something extra is needed, like Pool Magic + PHOSfree. Pools with green spring openings usually have a phosphate problem, although they may also have cover problems and/or water level problems.
The most important thing to note with winter pool chemicals is that more will be needed if you have contaminants entering the pool, be they full sized leaves, or dust that washes off the trees. More will also be needed when the temperature of the water rises.
Pool Water Temperature Concerns
When the pool water temperature drops to 50ºF or below, the algae risk is almost nonexistent. Chemicals also last longer when the water is cold. But when the water temps warm up in the spring, your chemical protection can deplete quickly. In temperatures above 65ºF, winter pool chemicals become active and will work themselves to death.
Use winter chemicals just after closing and just before opening. During the colder months, very little is going on under the cover, but as things heat up, more chemicals are consumed, and more organisms spring to life. Mesh covers will allow some sunlight to pass through, which can warm the pool surface.
Mesh Pool Cover Problems
Solid and mesh covers with drain panels let in all sorts of microscopic debris during the winter. If the pool water level is allowed to touch the underside of the cover, leaves get stuck on the cover, and a tea bag effect is created.
Water balance can change dramatically in a mesh covered pool. It should be checked at some point during the spring. It’s a good idea to add an extra dose of shock or algaecide (but not both) as the weather begins to warm up into the 60’s.
Our Recommendation
In mid to late spring, or about a month before you plan to open the pool:
Remove springs on both sides of the pool. Fold x onto itself in the center.
Use a small submersible pump or a siphon to lower water below the tile.
Check and balance the water chemistry and shock the pool, or add a Qt. of algaecide.
Fill the chlorine floater with tablets.
Brush the walls on both sides of the pool.
Put the pool cover back on tightly.
If you open up to a green pool each spring, think if you have any of these problems above, fixing one or more of them can give you a beautiful blue pool next spring!
Kimmo Salvén – 5.11.2013 – 11:36:39
Filosofian professori Seppo Sajama Itä-Suomen yliopistosta puhui Filosofiakahvilassa pitämässään alustuksessa luonnon itseisarvon kritiikistä.
Sajama toteaa luonnon itseisarvon käsitteen olevan ympäristöfilosofiassa asia, jota ei usein kyseenalaisteta, niinpä hän tekee sen nyt.
Aristoteles nousee väistämättä esiin itseisarvon käsitystä tutkiessa. Sajama toteaa, että Aristoteleen mukaan onnellisuus on ainoa asia mitä haluamme aina sen itsensä, ei milloinkaan jonkin muun asian takia.
– Kaikki ihmiset haluavat onnellisuutta. Tämä tarkoittaa, että kaikki ihmiset haluavat jotain oman onnellisutensa vuoksi. Se voi olla kunnia, nautinto, ymmärrys ja niin edelleen, kuten Aristoteles luettelee, Sajama toteaa.
– Haluamme siis eri asioita, mutta haluamme niitä onnellisuuden välineinä.
Sajaman mukaan Aristoteles jakavaa arvokkaat asiat kolmeen ryhmään: Itseisarvoihin, välinearvoihin ja sekä itseis- että välinearvoihin.
– Nautinto voi siis olla hyvä asia itsessään, mutta myös väline onnellisuuden saavuttamiseen.
Moore on Aristoteleen jälkeen eniten itseisarvon käsitteeseen vaikuttanut filosofi. Ympäristöfilosofiassa luonnon itseisarvo käsitetään nimittäin yleensä moorelaisittain luonnolla olevaksi, ihmisestä riippumattomaksi arvoksi. Tämän käsityksen mukaan luonnolla olisi itseisarvonsa, vaikka yhtäkään ihmistä ei olisi sitä kokemassa.
– Hän sanoo, että itseisarvo näyttäytyy luotettavasti vain silloin, kun se on eristetty ulkoisista häiriöistä.
Kuvittele äärimmäisen kaunis maailma. Kuvittele se niin kauniiksi kuin ikinä voit. Sijoita siihen mitä tahansa, mitä pidät kaikkein kauneimpana tässä maailmassa: vuoria, jokia, meriä, puita, auringonlaskuja, tähtiä ja kuu. Kuvittele, että nämä kaikki yhdistetään hienoin suhtein, niin ettei mikään niistä riitele muiden kanssa vaan jokainen tuo oman lisänsä kokonaisuuden kauneuteen. Ja kuvittele siiten rumin maailma, jonka voit mitenkään käsittää. Kuvittele se saastaläjäksi, joka sisältää kaiken, mikä eniten iljettää meitä mistä tahansa syystä, ja jossa ei ole yhtään miellyttävää piirrettä. … Ainoa asia, jota emme saa kuvitella, on se, että joku ihminen on koskaan asunut tai edes voisi asua kummassakaan ja voisi nähdä toisen kauneuden ja nauttia siitä ja vihata toisen rumuutta. … Onko jotenkin irrationaalista väittää, että olisi parempi, että olemassa olisi kaunis maailma kuin ruma?
G. E. Moore 1903: Principia Ethica. Cambridge: Cambridge University Press
Onko siis itseisarvoja olemassa ilman ihmistä niiden kokijana?
– Jos on olemassa ei ihmiskeskeisiä itseisarvoja, miten ne voidaan havaita? Kuka ne voi havaita? Siinä on pieni ristiriita, että luonnon itseisarvon olisi toimittava ihmisen toiminnan johtotähtenä ja että se on kuitenkin jollain tapaa eristettävä ja sitä ei saa havaita ihmiskeskeisesti.
Siispä Sajama palaa Aristoteleen ajatuksiin luonnon itseisarvosta.
– Aristoteleen naturalistinen idea oli, että jollain asialla X oli arvoa oliolle Y siinä tapauksessa, että X edistää Y:n hyvää elämää. Tämä oli siis räikeä naturalistinen virhe.
Kuinka siis saada itseisarvo mukaan yhtälöön? Voidaanko itseisarvo löytää muista kuin elollisista olioista? Antaako luonnon itseisarvo ihmiselle velvollisuuden suojella kaikkea elämää ja onko kaikki elämä tasa-arvoista?
Olipa kerran itseisarvoinen lammas, joka söi itseisarvoista ruohoa itseisarvoisella niityllä. Sitten paikalle tuli itseisarvoinen susi, joka söi lampaan. Lopuksi itseisarvoinen ihminen ampui suden. Loukattiinko tässä luonnon itseisarvoa? Missä vaiheessa?
Olli Saastamoinen & Seppo Sajama
Usein luonnon itseisarvoa käsitetään asettamalla vastakkain luonto ja ihminen, mutta kuuluuko ihminen luonnon itseisarvon näkökulmasta muiden eliöiden joukkoon?
Mooren ja Aristoteleen näkemysten lisäksi puheenvuorossa nousevat esiin mm. John O’Neil, James Coufal, Holmes Rolston III, Oidipus ja Tuomas Akvavinolainen.
After what seems to have been an endless winter, the warm days can’t get here soon enough, and they’re finally right around the corner! And nothing can ruin your day faster than pulling back your pool cover to see a green, algae-filled pool. Hopefully this won’t happen to you this summer, but if it does, here’s what you’ll need to know about shocking your pool to remove algae.
First Steps to Clearing a Green Pool
Before you start pouring shock in the pool, the first step is to brush the sides and floor of your pool to loosen all the algae. Doing this breaks the skin and allows the pool shock to more easily kill the algae. Once you’ve done this, it is important to make sure you have the proper pH level in your water. The best pH level should be on the low side, between 7.2-7.4. A high pH level can prevent the chlorine shock from properly killing the algae. Be sure to test your pH before adjusting, with a fresh and reliable test strip or test kit.
In order to clear a pool suffering from a severe algae bloom, a chlorine level of about 30 ppm is preferable for optimal results. If you aren’t dealing with a full blown algae bloom, levels of 10-20 ppm can be effective.
Shock the Pool:
The best way to administer shock into your pool is by pouring it into a bucket of water with at least a couple gallons of water. Mix it to dissolve, and pour the mixture around the perimeter of the pool. And remember — always add shock to water, never add water to shock!
Now it’s time to wait a while. Keep your pump and filter running. Give the shock a good 12 to 24 hours to work its magic. If the algae hasn’t cleared up after 24-48 hours, clean and brush the pool and add another shock treatment.
When the chlorine has completely finished working, the algae in the pool will turn a white/gray color and will either settle to the bottom of the pool or be suspended in the water. There shouldn’t be any more green color and the water visibility should be improving. Run the filter 24/7 and backwash as needed.
Clean the Pool:
When the water begins to clear, it’s time to vacuum your pool to get rid of all the dead algae. You can use a flocculant to settle suspended debris or a clarifier to aid in filtering. It is best to vacuum the dead algae to waste. You don’t want to trap all the dead algae in your filter. That can create a recurring algae problem.
Once the debris is gone from the water, it’s time to brush again with a new or good condition pool brush. Make sure there is no residual algae left on the walls or floor. Brush vigorously! If you feel the pain in your shoulders and arms, you’re doing it right!
Clean the Filter:
After a thorough vacuuming and brushing, it is a good idea to clean your filter as well. If you have a DE or cartridge filter, remove the element and soak or spray with In The Swim Cartridge Filter Cleaner, and spray away all dirt and algae. Sand filters are a little more difficult to get clean. You can either replace the sand, or you can use a Sand Filter Cleaner. Natural Chemistry’s Filter Perfect does a great job on any filter type, using natural enzymes and citric acids.
Test and Balance the Water Chemistry:
Test and adjust your pool to these levels: Free chlorine: 2.0–4.0 ppm, pH: 7.4–7.6, Total Alkalinity: 80–120 ppm, and Calcium Hardness: 200–400 ppm. Proper water balance in your pool is crucial to keeping clean water and staying algae free.
Any time your pool drops below 1 ppm of free chlorine, you are in thedanger zone for algae (not to mention bacteria and viruses), especially if your pH and alkalinity levels are off, too. When your chlorine level is not high enough, it fails to kill off organic compounds that aid in algae growth.
Algae feeds off of phosphates found in plants and almost all other things in our environment. When phosphates enter the water with chlorine below 1 ppm, you’re almost sure to have an algae bloom. Sometimes it can even happen in a matter of hours!
How to Prevent Algae:
Prevent algae with good water balance and constant chlorination. There are a lot of maintenance products out there to help safeguard against algae and keep it from ever being an issue. For extra algae prevention, use weekly maintenance doses of algaecide and Natural Chemistry’s PhosFree to eliminate an algae food source.
Algae is a lot easier to prevent than to remove, but once you have it, brush the pool, lower your pH with a pH reducer, and then Super Shock the pool. Vacuum and brush again, and clean the filter — that’s the most effective way to get your pool back to normal.
DOOZY VAPE CO. SERIOUSLY POD FILL MAX STRAWBERRY MILK
Seriously Pod Fill MAX Strawberry Milk, by Doozy Vape Co., is a unique variation on the intense sweetness of succulent strawberries splashed with milk for a creamier mouthfeel. Explore Doozy Vape Co.’s vast range of e-liquids in their fruity, menthol and dessert-themed grandeur, including their Seriously Bar Salts, Seriously Salty and Seriously Fusionz.
Specifications
Flavours: Strawberries, Milk
Bottle Size: 40ml of e-liquid in a 60ml shortfill bottle
Nicotine Strength: 0mg
Nic-Shots: Space for two 10ml nic shots
VG/PG Ratio: 50/50
Vaping Style: MTL
Manufactured in the UK
Childproof Cap
Tamper-proof Seal
Easy Fill Spout
Established in 2015, Doozy Vape Co. is known globally as a premium-quality e-liquid manufacturer passionate about crafting the most ingenious flavours ever to bless the vaping industry. Thanks to Doozy’s years of expertise, their range covers a variety of flavours in both nicotine salts and shortfills, providing a flawless vaping experience for both mouth-to-lung (MTL) and direct-to-lung (DTL) vapers. Suffice it to say, their variety and delectable flavours make them the ultimate substitute for single-use disposable vapes and guaranteed to suit your refillable pod kit.
Unlike other common shortfills, these Seriously Pod Fill MAX shortfill e-liquids are expertly balanced in a 50/50 VG/PG mix, all suitable and recommended for use with low-powered Vape Starter Kits (mouth-to-lung) and Pod Vape Kits.
Available in a 60ml bottle containing 40ml of e-liquid, the MAX edition empowers vapers to adjust their nicotine strength to their liking further. The bottle leaves space for two optional 10 ml nicotine shots to be added, where one nic shot would ensure a nicotine strength of approximately 3 to 4mg, while two nic shots would achieve roughly 6 to 7mg overall strength.
1. Activated alumina ceramic balls have a certain adsorption effect and can be used to adsorb some polar substances. Simply put, activated alumina is active and will react with the material. Activated alumina ball has many capillary pores and large surface area, which can be used as adsorbent, desiccant and catalyst. At the same time, it is also determined according to the polarity of the adsorbed substance. It has a strong affinity for water, oxides, acetic acid, alkali, etc. The activated alumina ball is a kind of micro-water deep desiccant, and it is also the adsorption of polar molecules. Agent. Activated alumina ball fluoride removal is similar to anion exchange resin, but the anion resin is more selective for fluoride ions. Activated alumina has good adsorption and defluorination effect, stable capacity, and 6400 grams of fluorine per cubic meter of activated alumina. The product has high strength, low wear, water immersion, no softening, no swelling, no powdering, no cracking.
Activated alumina ball has many capillary pores and large surface area, which can be used as adsorbent, desiccant and catalyst. At the same time, it is also determined according to the polarity of the adsorbed substance, which has a strong affinity for water, oxides, acetic acid, alkali, etc. The activated alumina ball is a kind of deep desiccant for water, and it is also an adsorbent for adsorbing polar molecules. .
Application field
Activated alumina balls can be widely used in the deep drying of petroleum cracking gas, ethylene and propylene gas and hydrogen production, air separation plants, instrument air dryers, and fluoride treatment in hydrogen peroxide. It can also remove sulfur hydrogen, sulfur dioxide, and hydrogen fluoride in the exhaust gas. , Hydrocarbons and other pollutants, especially suitable for the defluorination treatment of fluorine-containing
2. Inert alumina ceramic balls are ordinary ceramic balls, which are used as spacers before and after the catalyst layer is filled in the reaction. The inert alumina ball is inert, will not react with the material, and play a protective role.
Inert ceramic balls have the characteristics of high strength, high chemical stability and thermal stability. Inert ceramic balls can withstand high temperature, pressure, acid, alkali, salt and various organic solvents. Inert ceramic balls are mainly used in petroleum, chemical, Fertilizer, natural gas and environmental protection industries. Inert ceramic balls are used as the support and covering material of the catalyst in the reactor, which can buffer the impact of the liquid and gas entering the reactor on the catalyst, protect the catalyst, and improve the distribution of liquid and gas in the reactor.
The inert ceramic ball has the characteristics of high strength, high chemical stability, thermal stability and resistance to high temperature, high pressure, acid, alkali, salt and various organic solvents.
In addition, activated alumina is generally not called porcelain ball, and inert alumina is called porcelain ball.
HDPE injection molding uses high-density polyethylene (HDPE), a cost-effective thermoplastic with good tensile strength and high impact resistance. This commodity plastic also has strong moisture resistance and is relatively easy to injection mold. HDPE is used in many applications, but it has a high rate of thermal expansion. Consequently, injection-molded HDPE parts are prone to higher shrinkage rates if they’re not designed and manufactured properly.
If you’re considering HDPE injection molding for your plastics project, keep reading to learn more about high-density polyethylene, including:
Advantages of HDPE
Disadvantages of HDPE
HDPE Injection Molding Applications
Properties of Injection Molded HDPE
Design Guidelines for HDPE Injection Molding
HDPE Processing Guidelines
Potential Alternatives to HDPE
Succeeding With HDPE Injection Molding
Then, create a free Fictiv account and upload your part drawing. Along with design for manufacturing assistance (DFM) from our engineering experts, you’ll gain access to our carefully vetted network of manufacturing partners. Why search for an HDPE injection molder on your own when you can get expert DFM feedback and leverage the power of Fictiv?
Advantages of HDPE
Injection molded HDPE provides important advantages.
Cost-Effective
HDPE, a type of polyethylene (PE), is a commonly used injection molding material that is significantly less expensive than specialty plastics and polymer blends. HDPE is readily available and has lower minimum order quantities (MOQs) than specialized materials.
Mechanical Properties
HDPE can’t compete with engineering plastics in terms of performance, but it’s an attractive, low-cost option for many applications that require good tensile strength, impact resistance, and overall toughness.
Chemical Resistance
Injection-molded HDPE resists a wide range of chemicals, including strong acids and bases. It also resists some oxidants and reducing agents. HDPE can be attacked by halogenated hydrocarbons, however, and it has limited resistance to mineral oils.
Disadvantages of HDPE
Despite its advantages, HDPE also has disadvantages that part designers need to consider.
High Thermal Expansion
HDPE has a relatively high coefficient of thermal expansion (143 μm/°C), a property that describes the extent to which a material expands with an increase in temperature. Because heating occurs during injection molding, HDPE parts can expand significantly. In turn, injection-molded HDPE may experience warping when it contracts during cooling.
Difficult To Bond
High-density polyethylene is a low surface energy (LSE) material that is very difficult to bond. Overmolding, an injection molding technique that molds one material over another, is ill-suited for HDPE. Specialized glue and adhesives for HDPE are available, but plastic fusion welding can also be used for assembly.
Flammable
HDPE is petroleum-based and highly flammable. It begins to burn when exposed to temperatures above 340°C and will continue to burn since it’s not self-extinguishing. For reduced flammability, HDPE grades with flame-retardants are available.
HDPE Injection Molding Applications
HDPE can be injection molded for industrial, automotive, and consumer goods applications. Food contact applications are less typical, but FDA grades of HDPE plastic are available.
Industrial Applications
Storage tanks
Crates
Mufflers
Housings
Automotive Applications
Fuel tanks
Reservoirs for brake and washer fluids
Cabin compartments
Interior trim
Consumer Goods Applications
Boat docks
Cutting boards
Plumbing fixtures
Outdoor cabinets
Properties of Injection Molded HDPE
HDPE is available in various brands and grades. The table below contains typical physical, mechanical, and injection molding properties of this popular material.
Table 1: Properties of HDPE
Design Guidelines for HDPE Injection Molding
HDPE parts that are poorly designed are more prone to injection molding defects. When you work with Fictiv, however, you’ll get DFM feedback that can help minimize risk. To learn about part design, download our free “Injection Molding Design Guide” to use as a reference.
Download the Injection Molding Design Guide
The following sections examine injection molding design considerations for HDPE parts.
Wall Thickness
Whenever possible, apply a uniform wall thickness throughout your part. If you need to use a greater thickness in some areas, make the transition from thinner to thicker sections gradual. Do not use transitions that are greater than 10% to 15% of the nominal wall thickness. Generally, the recommended minimum wall thickness for HDPE ranges between 0.76 and 3.18 mm.
Shrinkage
Injection molded HDPE has a relatively high rate of shrinkage (up to 4%). The exact percentage depends on the grade of HDPE that you select, as well as the specific processing conditions. If parts shrink unevenly during cooling, warping may occur. To limit the risk of defects, reduce the wall thickness and the size of the mold gate area.
Radii
Sharp corners are difficult to injection mold. Therefore, apply radii to both the inside and outside corners of your part. To limit stress concentrations and melt flow, make the radii at least 25% of the wall thickness. For maximum part strength, apply a radius equal to 75% of the wall thickness.
Draft Angle
Draft is the angle that you apply to the vertical walls of parts so that they eject cleanly from the injection mold. Because HDPE has a low coefficient of friction, parts with simple shapes need very little draft. For more complex HDPE parts, apply draft angles between 0.5% and 1% per side.
Part Tolerance
Tolerances are acceptable variations in size for overall dimensions and part features. As a rule, parts with tighter tolerances are more expensive because they have stricter injection mold and processing requirements. In addition, parts with fine tolerances are more expensive to mold than parts with commercial tolerances.
Table 2 below contains some dimensional tolerances for HDPE. Note how they are also based on part size.
Table 2: HDPE Injection Molding Tolerances
HDPE Processing Guidelines
Adherence to HDPE processing guidelines is beyond a part designer’s immediate control. Therefore, it’s important to work with an experienced HDPE injection molder. The following processing parameters are especially important:
Moisture
HDPE does not readily absorb moisture. If stored properly, it may not need drying before injection molding. Drying is required, however, if surface moisture has settled onto the material during storage.
Temperature Control
The melt temperature for HDPE is between 246 to 280°C. The mold temperature ranges between 45 and 65°C. Increasing the mold temperature can reduce internal part stresses and produce parts with a glossier surface finish.
Injection Pressure
The injection pressure for HDPE injection molding depends on the design and size of your part. In general, however, injection pressures range from 5.5 to 10 MPa because HDPE flows readily. Reducing the injection pressure can help reduce part warpage.
Injection Speed
HDPE crystallizes fairly quickly. Therefore, thin-walled parts need fast injection speeds. For thicker-walled parts, medium injection speeds are recommended.
Potential Alternatives to HDPE
Injection molded HDPE might not be the best material for your application. If that’s the case, you could consider polypropylene or nylon instead. Fictiv’s injection molding services work with both of these materials.
Polypropylene
Polypropylene (PP) is a commodity thermoplastic with good fatigue strength, a low coefficient of friction, and excellent moisture resistance. Like HDPE, it’s also cost-effective.
Nylon
Nylon has good mechanical strength and can be filled with glass fibers for enhanced properties. It absorbs moisture, however, so nylon is not a good choice for injection molded products where there’s continuous contact with water.
Succeeding With HDPE Injection Molding
HDPE is an injection molding material with attractive properties, but a manufacturing-ready design and a skilled production partner are critical. Fictiv has the engineering experts and manufacturing network you need to get quality parts fast. From prototyping through production, we’re here to help you succeed.
Create your free Fictiv account and request an injection molding quote today — we mold complex parts at ridiculous speeds!
Because castor oil is a non-drying oil, interesterification and physical blend of castor oil with sacha inchi oil were compared as methods to produce drying oils that could be used for the synthesis of alkyd resins.
First of all, no significant differences were detected between the interesterified product and the physical blend by FTIR, 1H NMR and other chemical analyses (fatty acids content, viscosity and colour).
However, a remarkably different oxidative behavior between the blend and its interesterified product was observed, i.e., the oxidative induction time of the physical blend was 0.08 h, significantly lower than that of the interesterified product (11.20 h). This indicates that, in addition to fatty acid composition, triacylglycerol composition and fatty acid location at glycerol have a strong effect in the oxidative stability. The ethanol solubility test showed a total dissolution of the interesterification product while the physical blend showed turbidity due to the non-polar nature of the sacha inchi oil.
Quite similar properties
The alkyd resins obtained from the physical blend and the interesterified product presented very similar characteristics of chemical composition, acid value, color, non-volatile matter, and viscosity. FTIR and 1H NMR analyses did not show significant differences between both resins. The drying times (set-to-touch, dry-to-touch, dry-hard, and dry-to-handle times) were similar regardless of the resin type. However, the cured film obtained from the interesterified product showed a higher hardness (scratch and gouge) than that of the physical blend. This higher scratch/gouge hardness of the cured films derived from the interesterification product can be explained due to the possibly higher degree of crosslinking of the resin, which is consistent with the higher rate of peroxide radical production observed by FTIR.
The other properties of both cured films were quite similar, i.e., water resistance (good), alkali resistance (poor), acidic resistance (good), non-polar solvent resistance (acceptable), adhesion (strong), and drying times.
The study has been published in Progress in Organic Coatings, Volume 162, January 2022.
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Nowadays, the electronics industry is developing rapidly, Bluetooth earphones are no longer something new to ordinary people for a long time, but from the perspective of the development of the entire audio industry, Bluetooth earphones are still a new thing, although some high-end brands such as Sony, Qualcomm, Samsung, Apple, etc. continue to innovate, the sound quality of Bluetooth earphones still cannot catch up with traditional earphones, let alone newcomers in the field of Bluetooth–earphone bone conduction earphones. However, the bone conduction sports Bluetooth earphone Runner Pro from Naenka gave me a new understanding of bone conduction earphones.
Before reviewing the Naenka Bone Conduction Sports Bluetooth earphone Runner Pro, let’s briefly talk about what bone conduction is. Simply, bone conduction is to converse the sound into mechanical vibrations of different frequencies, and to transmit the sound waves through the human skull, bone labyrinth, inner ear lymphatic fluid, spiral organs, auditory nerve, and auditory center. Compared with the sound conduction of traditional acoustic headphones, bone conduction does not have to pass through the tympanic membrane, which can protect hearing; at the same time, bone conduction eliminates the step of sound wave transmission, which means that we can can still hear the sound of the earphone clearly in any occasion without affecting the communication with the outside world .
Well, let’s turn back to the Naenka Bone Conduction Sports Bluetooth Earphone Runner Pro. The color of Naenka Runner Pro bone conduction earphones is Legend Black which uses black packaging, on the front is the Naenka English LOGO rendered in golden fonts and the concept of bone conduction headphones ”Non-In-Ear Bone Conduction Technology”; on the back of the box is the rendering of the earphone, core selling points of products and the related information.
On the left side of the box is the Naenka Runner Pro bone conduction earphone, and the accessory box for the manual, charging cable and soundproof earplugs are on the right. From the appearance, the Naenka Runner Pro bone conduction earphone is made of memory aluminum alloy, silicone, and plastic. This is why it can be recovered after being bent; back-hanging earphones will hurt if they are worn for a long time, which is the indelible shortcoming of this design, so it is important to make the earphones lighter. The Naenka Runner Pro bone conduction earphone weighs only 33 grams. The extremely light weight will not cause ear pain even if worn for a long time, and the surface of the earphone is covered with the silica gel, the whole touch is still very soft.
It is worth mentioning that the Naenka Runner Pro bone conduction earphone can be fully adapted to the frames of glasses, and there will be no problems with wearing both earphone and glasses. And even if you jump, there is almost no movement, which is quite friendly for people who wear glasses like me.
In terms of detail design, the external of the left side is the Logo “Naenka”, and the internal is the product information; at the bottom of the right side, from top to bottom, are the on-off button–press to switch on and off–and the volume increase/decrease button, the design of the entire button is not much different from similar products on the market. But the most surprising thing is the inner charging port, which uses a flat magnetic charging technology. Compared to the traditional charging port, it is not easy to bend and damage, not easy to dust, easy to clean, anti-oxidation, and enhanced waterproof effect, and extend the service life, but this also means that we must bring the Naenka Runner Pro bone conduction earphone charging cable in addition to the traditional Type-C charging cable.
Since we are talking about the charging port, let’s take a look at the battery life of the Naenka Runner Pro bone conduction earphone. Its battery capacity is 230mAh, the battery life is six hours, and the standby time is 240 hours, that is, ten days. From the actual use of the situation, after two hours of continuous use, the remaining power is 70%. Judging by my one hour of exercise time per day, I can basically charge it once a week.
As a sports Bluetooth earphone, waterproof and sweat-proof are essential, after all, sweat is inevitable. Naenka Runner Pro bone conduction earphone adopts seamless injection molding, fully enclosed cavity design and IPX8 waterproof and sweat-proof level to ensure that it can operate stably in various sports venues, even when swimming and bathing.
After all this, it’s time to talk about the most basic quality of headphones–listening to music. The Naenka Runner Pro bone conduction earphone comes with 8GB of internal storage. It means that we can store 1500 songs in the earphone, including WAV, FLAC, APE, MP3, WMA and other music formats. The earphone can be connected to the computer through the data cable to transfer data and store the songs, which is the memory mode of the Naenka Runner Pro bone conduction earphone; of course, you can also connect to the device via Bluetooth for song playback, that is, the Bluetooth mode. In the current market of similar products, most of them only support the Bluetooth mode, and there are not many products that have both two modes at the same time.
For a long time, sound leakage is the inevitable problem of bone conduction headphones. The Naenka Runner Pro bone conduction headphones use a imporous body design and exclusive OT closed 2.0 sound leakage reduction technology to reduce 80% of the sound leakage, basically solve the sound leakage of most bone conduction headphones, so that the sound quality has also been greatly improved, and it can also have a good playback effect even in a noisy environment; with the new generation of vibration absorption technology, the same volume, less vibration, more comfortable to wear.
In terms of sound quality, the Naenka Runner Pro bone conduction earphone is equipped with a 16nm large dynamic unit. In conjunction with the new bone conduction technology, the sound field is more open. From the audition effect, the bass can be strong and powerful, while the mid-range and the treble is delicate and extremely penetrating, and the human voice is natural. Naenka Runner Pro bone conduction headphones are excellent enough in sound control.
Noise cancellation and latency are not the key points of bone conduction headphones, while the performance of Naenka Runner Pro bone conduction headphones are also very good in these two aspects. Bluetooth 5.0 technology can achieve game optimization. It can clearly locate the position of the “enemy” through the sound in the “Game for Peace”, the perception of “enemy”, the perception of footsteps from far to near is very obvious; and with the support of the CVC 6.0 noise cancellation technology, Naenka Runner Pro bone conduction headphones can recognize human voices and noises, and can maintain a clear call in any noisy environment.
The author says
As a middle-aged man, exercise has become part of my daily life. I rarely wear headphones before, because I often wear earphone when writing articles, and exercise time is the rare the time that I don’t need to wear earphone. With the Naenka Runner Pro bone conduction headphones, wearing the headphones for a long time will not hurt the ears, and the overall sound quality is maintained at a high level.
If there are shortcomings, I personally may prefer Type-C, but of course it doesn’t matter if it is just used at home. Well, this is all the simple use method and experience of this bone conduction Bluetooth earphone. If you have any opinion about bone conduction earphones, welcome to chat together.