Which Films Suit a Side Seal Bag Making Machine OPP PE POF

Why do some rolls of film make clean, strong bags while others curl or split? In most cases, it is the film that is the issue, not the machine. Ruian Yunfeng Machinery Co., Ltd. has been manufacturing plastic machines for more than 20 years. Its side seal bag making machine operates with a defined list of films. The fundamental lesson is simple: Choose the film for the bag first. Then fit the machine to suit it.

The Yunfeng YF-BF side seal machine is compatible with plain plastic films: OPP, PP, PE, CPP, and POF. It produces garments, towels, bread, and jewelry bags. Each film is best suited for a particular kind of bag. Each bag, the bags it fits, important machine features, model sizes, and film testing are all covered in this guide.

How Side Sealing Turns Film Into Finished Bags

Side sealing is a means of sealing and cutting the film at one time on both sides of a bag. A side sealing bag making machine pushes the film forward. Then a hot sealing tool pushes onto it. The heat fuses the two layers together and slices off each bag.

Many people refer to it as a side weld bag making machine, since it seals and cuts at the same time. The film is commonly folded so the fold is at the bottom of the bag. This keeps the front clean and flat, which is good for transparent store bags.

Where Side Sealing Fits Among Bag Machines

Side sealing is just one way to make bags. Vest bag, flat bag, and roll bag machines serve other needs. You can see them all in the Yunfeng plastic bag making machine range.

Core Films for a Side Seal Bag Making Machine

The five films this machine can run are OPP, PP, PE, CPP, and POF. The page for the side seal bag making machine calls them non-printing plastic films. This means the machine is made for plain film. If your film is printed, ask the factory first.

OPP Film for Clear, Crisp Retail Packs

Clear, solid, and glossy describe OPP film. OPP means oriented polypropylene. In manufacturing, it is stretched, which gives it a crisp texture and a vivid shelf presence.

OPP is typically used for jewelry bags because clear film shows details clearly. It is also used in clothing bags. So a garment bag making machine often runs this film. If the heat is too intense, OPP will flex out of shape. That is why an OPP bag making machine needs steady heat.

PE Film for Soft, Tough Everyday Bags

PE film is soft, flexible, and resistant to tearing. PE stands for polyethylene. It seals at a lower heat than PP films; thus, it is simple to deal with.

A bread bag making machine often runs this film since bakeries use PE for bread. PE is also good for towel bags - as it wraps soft things without cracking.

POF Film: When the Pack Needs to Shrink

POF film is a shrink film that tightens when heated. The side seal machine just creates and seals the POF bag. The shrinking occurs later, in a separate heating stage, after the product is placed inside.

Before shrinking, make the bag big enough to accommodate the goods.

PP and CPP: Two More Films on the List

PP and CPP are the last two films on the list. PP stands for polypropylene. It holds its shape and is clear. CPP is cast polypropylene. It is produced without stretching; thus, it is softer than OPP and seals better. Both are useful for clear bags when OPP is too stiff.

Matching Each Film to the Bag You Sell

The right film is the one that fits your product. Use this chart as a starting point for any side seal bag making machine. Then check your choice with a test run.

Film and Bag Match Chart

Use this chart as a guide, then confirm with a test run on your own film.

Machine Features That Keep Every Seal Even

Each feature on this side seal bag making machine has one goal. Every bag should come out the same, with the same seal.

Constant Heat for Clean, Firm Side Seals

Automatic constant temperature keeps the seal strength steady. The product page says it gives a firm, even seal. Since PE and OPP need different heat, steady heat helps each time you change film.

Photoelectric Tracking and Fixed Length

Photoelectric tracking uses a light sensor to keep each bag the same length. The YF-BF can make bags at any fixed length. The page says the feed is accurate and smooth. It also has an automatic stop signal, which helps cut waste.

Adhesive Tape and Automatic Drilling in One Pass

The YF-BF adds tape and drills holes while it makes the bags. Double-sided tape goes on at the same pace as the film, so each flap gets tape in the same spot. This makes it a handy self-adhesive bag making machine.

Stepper or Servo Drive for Film Feeding

The YF-BF uses a stepper motor to feed the film. A servo motor system is also available as an option. Variable frequency speed control sets how fast the machine runs. A servo motor often gives finer control. This helps an automatic side seal bag making machine handle thin films.

How Wide and How Fast Each Model Runs

Start with your widest bag to pick a model. Then look at speed. The three YF-BF models differ in width, speed, and size.

YF-BF Model Specifications

For example, a 700 mm wide bag fits the YF-BF-800 with room to spare. The YF-BF-600 is the fastest model. It can make up to 260 bags per minute.

Every side seal plastic bag making machine in this series uses 220V/50Hz, so check your power supply too. For more buying tips, read this guide on picking a bag machine supplier.

Test Your Own Film Before You Commit

The surest way is to run your own film on a side seal bag making machine. The name of the two films is the same; however, the thickness or sealing heat may be different.

Buyers may come and test the equipment along with the crew, Yunfeng FAQ said. “Bring your own film. If you cannot come, the manufacturer will do the test and give you a video. You can read more in the Yunfeng machine testing FAQ.

The team also answers questions within 12 hours. The factory is in Ruian, Zhejiang, near Wenzhou Airport

What to Check During a Film Trial

• Seal strength: Pull the seam by hand. A good seal holds while the film near it stretches.

• Flat bags: The finished bags should lie flat and not curl.

• Same length: Measure 10 bags in a row and compare them.

• Tape and holes: Both should be in the same place on every bag.

The Factory and Service Behind the Machine

Ruian Yunfeng Machinery Co., Ltd. started in 2001. It has more than 20 years of work in plastic machines. Its factory base covers 10,000 m² and makes 500 units a year. The company holds more than 10 national patents, as shown in the Yunfeng company profile.

Its machines are sold in more than 60 countries, including the USA, Mexico, Spain and India. In 2019, the company moved to a new plant in Ruian, Wenzhou, Zhejiang Province, China.

Warranty and After-Sales Support

Each machine comes with a 12-month warranty from the day of delivery, subject to the contract. If a part fails because of a quality problem, it is fixed for free. The team also offers setup at your site, staff training, video help, and original parts. See the full terms on the 12-month after-sales warranty page.

FAQs

Can a side seal bag making machine run POF film?

Yes, the Yunfeng YF-BF has POF film in its list. The machine makes and seals the POF bag. The film is then shrunk in a separate heating phase once the product has entered. Plan your line accordingly.

Can it make self-adhesive bags?

Yes, the YF-BF adds double-sided tape as it makes each bag. You don't need another machine to add tape. It can also drill holes in a single run, saving time.

Does it work with printed film?

The product page says non-printing plastic film. So basic film is the safe bet. If you want to print film, ask the manufacturer first. A test run should then be requested. The test will determine if the bags suit your requirements.

What bag widths are possible?

The widest bag is 550 mm on YF-BF-600 and 750 mm on YF-BF-800. The YF-BF-1000-1500 handles 950 to 1450 mm. Bag length runs from 50 mm to 700 mm for the two smaller models.

How fast does it run?

The speed may be changed from 40 to 260 bags/min. The YF-BF-600 makes up to 260 bags each minute. The YF-BF-800 makes up to 240, while the YF-BF-1000-1500 makes up to 220. Actual speed depends on bag length and film type.

What warranty comes with it?

The warranty is 12 months from the date of delivery, subject to the contract. During this period, quality issues are rectified at no cost. On-site setup, staff training, and video assistance are all included as part of the service.

Conclusion

Use OPP for crisp, clear retail bags and PE for soft bread or towel bags. POF is used when the pack has to shrink later. PP or CPP is for a softer, clearer film. Test your own film after that.

Ruian Yunfeng Machinery Co., Ltd. offers test runs with your own film, three model sizes, and a 12-month warranty. So you can check the fit before you buy. To book a test, contact the Yunfeng sales team.