T: +86-769-82332313
E: suzy@yhmmb.com
E: suzy@yhmmb.com
No.88, Yougjun Road, Changlong Village, Huangjiang Town, Dongguan City.
Views: 0 Author: Site Editor Publish Time: 2026-02-06 Origin: Site
Moisture can damage recycled plastic when you process it. You can fix this by using drying machines. You should also keep materials in closed containers. Pick the best additives for your needs. Desiccant Masterbatch helps take in moisture fast and keeps products strong. If you control moisture, your products will be better. Your work will also be faster and easier. Use these tips to get good results each time.
Moisture can damage recycled plastic. Use drying machines to help. Keep materials in closed containers to stop moisture.
Watch for signs of moisture like streaks or bubbles. Finding these early helps stop problems in production.
Desiccant Masterbatch is a good additive that soaks up moisture. Use the right amount for your material to get the best results.
Store recycled plastics in dry places. Use dehumidifiers to control humidity. This keeps your materials safe and strong.
Check moisture levels often and take care of your machines. This lowers waste and makes your products better.
You can find moisture problems by looking for certain clues. One clue is streaks or marks on the plastic’s surface. These streaks look light or white and stretch across the product.
Splay, sometimes called 'silver streaks', is a common problem in injection molding. It shows up as light or white lines on the plastic’s surface. This happens when moisture in the material turns into vapor during molding. The vapor makes tiny bubbles that turn into streaks.
You might see bubbles or small holes in the finished plastic. These problems can make the plastic look weak or uneven. Sometimes, recycled PET bottles have about 6.4% residue. This residue has dirt and moisture, which can lower the quality of your materials.
To find moisture before you start, you can use special tools. Here are some ways to check for moisture:
The Moisture Gate system lets trucks go through a scanner. The scanner measures moisture in the load.
About 75% of the truckload gets scanned in 30 seconds. You get a reading for the whole load in less than a minute.
The data is shared with suppliers in a simple format. This helps everyone see the results and control quality.
Moisture in recycled plastics causes many problems when you process them. You may see defects like voids, splay, and even plastic breaking down. These problems can make more products fail quality checks. If you do not control moisture, your final products may not look good or work well.
Less sticking between wood and the polymer matrix leads to creep and weaker performance.
More wood in samples means more swelling and water absorption because wood likes water.
Voids
Splay and silver streaks
Polymer breaking down
Bad shot size control
Lower melt viscosity
Moisture can also make your products weaker. You may notice the plastic swells or takes in more water, especially if it has wood fibers. These problems make it hard to make good recycled plastic items. If you learn to spot these clues early, you can fix moisture problems before they hurt your production.
You can get rid of moisture in recycled plastics in many ways. Each way has its own good points. Here are some of the best ways:
Infrared Drying: This way uses special infrared light. It dries plastic fast and saves energy. It keeps the quality steady and stops oxidation. You will not need to fix machines as often.
High-Speed Spinning: This way dries plastic without heat. It works quickly and uses less energy than old ways. The plastic ends up with even moisture.
Thermal Drying: This is the most used way. It uses heat to dry plastic. But it can use a lot of energy and cost more. Try to make this way work better if you use it.
FlowDrya Equipment: This tool uses leftover heat from gas engines. It dries plastic and does not use much energy.
Tip: Pick the drying way that fits your material and needs. Good drying saves energy and makes your products better.
Desiccant Masterbatch is a special additive for controlling moisture. It has agents like Calcium Oxide (CaO) that react with water. When you add it to recycled plastic, it grabs both free and bound water. This makes stable compounds and takes out moisture. You do not have to dry your plastic as much before, so you save time and energy.
You can use Desiccant Masterbatch in many recycled plastics. It works in PE films, PP woven bags, injection molding, and high-grade packaging. The right amount depends on the CaO content and what you are making. Here is a table to help you pick:
CaO Content | Moisture Absorption | Recommended Dosage | Typical Applications |
|---|---|---|---|
50% | Moderate moisture absorption | 3% – 5% | General PE films, PP woven bags |
65% | High moisture absorption | 2% – 4% | Injection molding, blow molding products |
75% | Very high moisture absorption | 1% – 3% | High-precision extrusion, high-grade packaging films |
80%+ | Maximum absorption, rapid effect | 1% – 2% | Moisture-sensitive engineering plastics, export packaging |
Note: Always use the right amount for your resin. Using too much or too little can change your product.
You can use other additives and drying agents to help with moisture. These work with Desiccant Masterbatch for better results. Some additives soak up water from the plastic. Others react with water to make stable compounds. Pick your additives based on your polymer and how much moisture you need to remove.
Polymer chemistry changes how much water your plastic takes in. Plastics with wood fibers take in more water. Humidity and temperature also matter. Always keep your materials in dry, closed containers. This stops new moisture from getting in.
Remember: Good moisture control starts with the right drying way, the best additives, and careful storage. When you use Desiccant Masterbatch and other drying agents, you stop defects and keep your process smooth.
Moisture problems can come back again and again. This happens even after you dry and store recycled plastics. These problems can make air bubbles and change colors. Your products may break easily. When moisture turns into vapor, it can make plastic weak. It can also hurt your machines. You will have more waste and spend more money. To fix this, check moisture in your resins before drying. Use tools to measure moisture. Change your drying settings for the water in your material. Try heating pellets with dry gas or dehumidified air. Always follow what the manufacturer says about safe moisture levels.
Drying your plastic the right way stops bad looks and chemical problems. Hydrolysis can break down plastic and make it weak.
Good storage and packaging keep moisture away from recycled plastics. Here is a table with some top ways to do this:
Packaging Solution | Benefits | Tips |
|---|---|---|
FIBC Bags (Jumbo Bags) | Strong, cheap, good for big shipments | Use PE liners inside to block moisture |
25kg Laminated Bags | Easy to carry, easy to track | Seal bags tight to keep out water and dirt |
Vacuum-Sealed Packaging | Best at stopping moisture, keeps longer | Use nitrogen flush in wet places |
Container Lining Systems | Stops water drops inside containers | Add dehumidifier bags for extra safety |
Keep your materials in closed bags or containers. Store them in dry places. This stops new moisture from getting in before you use Desiccant Masterbatch or other drying agents.
You can control air in your storage area to stop moisture. Many companies use dehumidifiers to keep air dry. This stops clumping and helps plastics stay strong. Some factories had 15% less spoiled products after using dehumidifiers. Less humidity means fewer problems and less waste. Your plastic will last longer in storage.
Use dehumidifiers to keep air dry.
Check humidity often.
Keep your storage area clean and dry.
Take care of your machines often. Check them, clean them, and change old parts. Teach your team to find moisture problems early. Keep good records to help plan and avoid trouble.
You can fix moisture problems in recycled plastic by drying it well. Use Desiccant Masterbatch and store your materials the right way. Clean your plastic before you start. Check for moisture at every step.
Take out dirt with chemical washing or strong rinsing.
Use shredders that help control moisture.
Keep moisture under 10-20% to stop problems.
Quality Assurance Practice | How It Helps Over Time |
|---|---|
Continuous Monitoring | Checks the process often to find ways to get better. |
Feedback Utilization | Uses ideas from workers to make things work smoother. |
Adherence to Standards | Follows rules to keep making good products. |
Pay attention and use these tips to make your recycled plastics strong and safe.
If you do not dry plastic, problems can happen. You might see bubbles or streaks. Your products can have weak spots. Moisture makes defects and lowers quality. Always dry plastic before you process it.
Look at your resin type and how much moisture there is. Use the table in this blog to help you. Start with the amount the table says. Change the dosage if you need better results.
You cannot use Desiccant Masterbatch again. It takes in moisture during processing. Always use new masterbatch for each batch of recycled plastic.
Humidity puts moisture into your plastic. High humidity can damage your materials before you use them. Keep plastics in dry, closed containers to protect them.
You can use moisture analyzers, scanners, or sensors. These tools give fast readings. They help you find problems early and keep your process safe.
