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How to Select a Moisture Analyzer for Moisture Plastic Analyzer

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moisture analyzer

When you select a moisture analyzer for a moisture plastic analyzer you will need a model that not only can quickly but also accurately gauge the moisture content of these resins.   And as with many quality control requirements that involve moisture content, you’ll want a moisture balance that can meet standards set by trade associations and professional organizations.

In this post you’ll get a briefing on the following:

  • why low moisture content is important in plastic resins
  • a technical standard that applies to determine moisture in plastics
  • how benchtop moisture analyzers work
  • a standards-compliant moisture analyzer
    for plastic resins

Why Low Moisture Content is  Important

Owners of injection molding companies and operators of injection molding machines are aware that incorrect moisture content in plastic resins can result in an inferior finished product.

Product shipped from resin suppliers may have the specified moisture content but ambient conditions at the injection molding facility could raise or lower moisture content before it is placed in the injection molding machine hoppers.

Companies involved in producing quality products by injection molding take steps to ensure proper resin storage. This along with using commercial drying ovens are two important steps in quality control.

Periodic checks with a benchtop moisture analyzer for plastic resins provides assurances that moisture content is on target, or otherwise call for pre-processing adjustments.

moisture analyzer

A Standard for Determining Moisture in Plastics

The American Society for Testing and Materials (ASTM) has published standard governing testing the moisture content of plastics*. It employs what is called the LOD method, or the loss of weight on drying. This is also described as the thermogravimetric method.

Taken directly from the published standard the test method is summarized here:

“The specimen is spread onto a sample pan that is supported on a balance in a heating chamber that has been preheated and equilibrated to the specified idle temperature. It is then heated to vaporize the moisture. The analysis is completed when the indicated weight loss falls below a rate specified in the test conditions. The total loss of weight is integrated and displayed as the percent of moisture. Both the analyzer’s balance and heater are calibrated to NIST** standards to achieve precise and accurate results.”

How a Benchtop Moisture Analyzer Works

The ASTM standard briefly describes the process.  Here is a bit more detail.

A benchtop moisture balance employs a drying process to extract and measure moisture.  It combines a precision balance and a heater.  In a simple 4-step procedure:

  1. The drying process parameters are entered on a keypad. These are the drying temperature which may include how the heat is applied (a.k.a. heating profile) and shut-off criteria.
  2. The sample is placed on a weighing pan located in the drying chamber.
  3. The drying chamber is closed and the analysis begins.
  4. The instrument calculates the moisture content by comparing the initial weight of the sample to the weight after drying is complete.

As in the standard, the total loss of weight is integrated and displayed as the percent of moisture.

Halogen quartz glass is generally the source of drying heat. These heaters provide constant even drying of the sample after temperatures are programmed in by the moisture analyzer operator. Temperature is generally maintained within 1⁰C of the selected setting.

While most analyses involve ramping the temperature to a maximum of 160⁰C or less, in special cases higher temperatures may be necessary to achieve complete drying. The analysis automatically terminates either when the dry weight is stable or at a time specified by the operator.

For more detail on how these instruments work please check our post on moisture analyzer questions and answers.

A Moisture Analyzer for Low-Moisture Plastics

A moisture balance complying with ASTM D 6980 – 04 is the  DSC 71P available from Tovatech.  This model provides precise moisture analysis and is equipped with a default program to test 75% of the most commonly used resins.  The  DSC 71P is highly recommended for:

  • Molders processing a limited number of plastic formulations
  • Molder having QC problems related to moisture content
  • Molders who need to replace an old moisture analyzer
  • Molders adding a new production facility and need another moisture analyzer to support it

It is also an ideal tool to check the moisture content of incoming resins, confirm moisture content before filling hoppers and check the performance of bulk dryers.

The  DSC 71P Moisture Analyzer Close-up

Thermogravimetric moisture analyzers such as the DSC 71P calculate moisture content by loss of weight on drying (LOD). This is more environmentally friendly and far less complex than the Karl Fischer moisture analysis requiring a high degree of skill and the use of hazardous chemicals.

Yet due to the very small amounts of moisture that can be tolerated in resins such as the <0.02% for polyethylene terephthalate sensitivity is critical. To address this the  DSC 71P has a readout of 0.0001g or 0.001% moisture. The repeatability (standard deviation) is ± 0.01% moisture content for a 10g sample.

Other features include:

  • 3 free tech support phone calls for optimizing test procedures
  • Custom programming for your resins available prior to shipment
  • Short measuring time. Get results quickly with fast and uniform heating
  • High repeatability. Superior accuracy even when weighing small samples
  • Real-time graphic display. Watch drying take place via a connected PC screen
  • Accuracy checks using sodium tartrate dihydrate with its stable moisture content

Simple Resin Moisture Calculation

Once programmed with up to 20 testing procedures all the operator has to do is call up the program for the particular plastic to be analyzed. The unit’s vacuum fluorescent display shows the drying profile (standard, quick, step, or ramp), time, and temperature (30⁰ to 200⁰C in 1⁰ increments) as well as shut-off criteria.

The unit comes with a 9mm (3.5 inches)  sample pan, WinCT Moisture software, 30 g sodium tartrate dihydrate for accuracy checks,  tweezers, a spoon, a RS 232C cable connection, and the instruction manual. A dot-matrix compact printer is available as an option for record-keeping. Other options include a 50 g calibration weight and a certified temperature calibrator.

A Resin Moisture Analyzer at an Attractive Price

Plastic resin moisture analyzers equipped with large libraries can cost around $10,000 or more depending on features. This is a substantial investment for small to medium-sized injection molding companies. The DSC 71P moisture balance with its broad range of features and outstanding accuracy is available for under $5,000.

Caution should be exercised when looking at lower-cost units because of their inability to deliver the high accuracy and precision needed for quality control when working with low-moisture resins.

Contact the scientists at Tovatech for advice on selecting and using a moisture analyzer to support your injection molding operations.

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6 Home Remedies to Relieve TMJ Pain

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6 Home Remedies to Relieve TMJ Pain

Talking, laughing, smiling, and chewing are all jaw movements that you make daily without much thought. However, these simple movements can cause much pain if you have temporomandibular joint dysfunction (TMJ). TMJ Leander discomfort may have a significant impact on your quality of life.

Teeth grinding is a common cause of temporomandibular joint disorders (TMJD), which can cause chronic pain and stiffness in the jaw, among other symptoms. There are a variety of therapies available to assist you to ease your discomfort.

Here are some home remedies to treat TMJ;

1.  Eat soft meals

 To prevent your jaws from overworking, eat soft meals like mashed potatoes, yogurt, mashed potatoes, soup, cottage cheese, salmon,   scrambled eggs, cooked fruits and vegetables, beans, and grains. Avoid Hard and crunchy foods (such as pretzels, hard rolls, and raw carrots) and chewy foods (like taffy and caramels). In addition, avoid chewing gum.

2.      Wear a bite guard

A bite guard (also known as a stabilizing splint) can protect your teeth from clenching or grinding. Bite guards are typically made of plastic, and they fit over your lower and upper teeth to keep them from rubbing together. Bite guards come in various styles; for example, you can wear a firm or soft bite guard.

Consult your physician or dentist to determine how long you should wear the bite guard. If the bite guard is causing you discomfort or changing the way you bite, stop using it immediately and consult your doctor.

3.  Use heat or cold therapy

Applying wet, warm heat packs or ice packs to your jaw might assist in relaxing the muscles in your face and jaw. Your doctor will tell you how long to leave the ice pack or heat pack on and where to put them.

4.      Learn to manage stress

Stress is one of the leading causes of TMJ. When people are worried, they tend to clench their jaws unconsciously throughout the day. If you are stressed, go for a walk daily to clear your thoughts, write down your concerns in a notebook, talk to a psychologist, try yoga, meditate, or soak in a bubble bath. Make every effort to relax and enjoy yourself.

5.      Limit jaw movement

Your jaw may strain your jaw if you yawn, scream, or sing at the top of your lungs frequently. To give your Temporomandibular a respite from movement, try to limit any severe jaw motions in your daily life. This may help to alleviate some of your discomforts.

6.      Try acupuncture or massage therapy

TMJ discomfort can also be relieved with acupuncture. The acupuncturist will insert needles in places surrounding your jaw and other areas to ease pain and enhance jaw function, enabling you to open your mouth easily. In addition, gently rubbing your TMJ joint can also help ease up the muscles surrounding your jaw and relieve pain.

Temporomandibular joint disorders may cause severe headaches, grinding and locking in your jaws, ringing in your ears, and neck pain. Fortunately, you may treat TMJ pain using home remedies. However, if the pain persists, you should seek further medical treatment. Contact Pendleton Orthodontics to book your appointment for TMJ treatment.

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Benefits of Regularly Visiting a General Practitioner

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Benefits of Regularly Visiting a General Practitioner

Regularly seeing a primary care physician may positively impact your health. Your trusted general practitioner (GP), Dr. Kalpana Desai is well-versed in dealing with various medical conditions and may tailor treatment to meet your requirements. You have a solid partnership when you have a long-term connection with a professional who treats the person, not just the condition. There are several additional reasons why it is a good idea to have a regular general practitioner, including:

Someone who understands you

GPs are typically the initial point of contact for your health. Having a regular GP gives them the chance to know you and develop a better grasp of your medical history. Every time you go to the doctor, you do not have to describe your medical history. The more often someone sees their primary care physician, the more likely they are to be open and honest with their doctor about their health. They believe that their concerns are taken into account.

An experienced general practitioner (GP) will be able to spot any problems with your health right away and recommend the right course of action. As soon as a problem becomes severe, persistent, or even life-threatening to the patient, the doctor takes measures to prevent it.

Integrated health care

If you have a medical problem that necessitates the participation of additional health care providers, your general practitioner is your primary point of contact. If a medical expert or allied health practitioners like a psychologist or podiatrist is necessary, this might be the first step.

Advice on health and wellness from a professional

Your general practitioner is your best bet when diagnosing and treating different health-related issues. In addition, they are likely to be the initial point of contact for most health difficulties you encounter in your lifetime. In addition to treating colds and flu, they are one of the most acceptable sources of science-based advice on maintaining a healthy lifestyle and avoiding illness in the first place!

A complete medical history kept in one place

Every time you see a local doctor, they take down essential information about your health, such as your family medical history, results of medical tests, prescriptions for drugs, allergies, etc. Regularly seeing your doctor ensures that your medical history is thorough, accurate, and up-to-date. When you visit your doctor, they will consult your medical file, and if you have been to more than one doctor, your information spreads out. As a consequence, your medical issues may be misdiagnosed and treated inappropriately.

General practitioners can identify and treat a wide range of common health issues. They might refer you to specialists if your problem is outside their practice area.

Accessibility

Because regular doctors are accessible at times convenient to you, you will have to wait less time for an appointment with them. You can expect to be seen within a few hours after seeking an appointment with a regular GP rather than a few days. Patients should expect to be seen on time by most frequent GPs, and the time spent in the waiting area will be substantially less than when visiting a different doctor.

You and your family’s health and well-being are best served by seeing a general practitioner regularly. Choosing a GP may be a complex process that requires a lot of trial and error. Finding a doctor with whom you are comfortable and who can work on your health for the long term is critical.

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What They Did Not Tell You About Sleep Apnea

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What They Did Not Tell You About Sleep Apnea

Do you know that sleep is equally important as a healthy diet? For wholesome health, you need a goodnight’s sleep. Therefore, if you are not sleeping as recommended, you expose yourself to various health issues. Pain and stress can keep you from sleeping. However, sleep apnea is a dangerous condition that can make you dread sleep. Chase Dental Sleepcare specialists will treat you if you have sleep apnea symptoms and help you get the sleep you have been missing. Therefore in this article, you will learn astonishing facts about sleep apnea.

·         Did You Know That You Can Develop Sleep Adverse Brain

Do you know that most sleep apnea people go undiagnosed and treated throughout their lifetime? If you have had sleep apnea and are not considered seeing a doctor, you can develop a sleep adverse brain. Once you are asleep, the airway becomes obstructed, and your brain responds by waking you up so you can breathe. So you will find every night you will wake up several times to gasp for air. With time, the brain becomes conditioned to keep you from sleeping because sleep makes your body lack enough oxygen because of sleep apnea. Therefore, you will find that you have insomnia where you cannot fall asleep at night.

·         It Severely Shortens Your Life

Sleep apnea is a dangerous condition that, if left untreated, shortens your life. When you cannot breathe during sleep, your body does not have sufficient oxygen. Deprivation of oxygen can cause a low heartbeat. You can suffocate, and if no one recognizes that you are not breathing in good time, you will lose your life. Also, if the brain becomes conditioned to recognize insufficient oxygen, your body reacts to establish a balance every time. The body releases the release of trigger hormones and sugars. With time, you discover you have Type 2 diabetes because the body releases too much insulin. Besides diabetes, you run the risk of suffering from life-threatening cardiovascular diseases.

·         It Poses A danger To You and Others

Because of sleep apnea, you can have irregular sleeping or insomnia. Your inability to sleep during the night will cause you to experience sleepiness during the day. If you drive yourself and fall asleep, you become a hazard to yourself and others using the road. You will cause an accident because you cannot control the vehicle. The accident can cost your life and the life of other road users. Also, if you function in a production site where you have to control machines, you can fall asleep and forget about the machine. The machine will either overheat or produce undesired quantities and quality goods. You can also get injured by the same machine.

Millions of people suffer from sleep apnea, making it important to see a doctor if you snore or have irregular sleeping during the night. The Chase Dental Sleepcare facility purely deals with the sleep disorders such as sleep apnea. If you are experiencing trouble sleeping, book an appointment today before too late.

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