Dalian Yuanhe Paper & Plastic Co., Ltd. : Your Professional OPP Self-Adhesive Bag Manufacturer!
Dalian Yuanhe Paper & Plastic Co., Ltd. was established in 2006. It is a comprehensive enterprise integrating product design and development, production, processing, manufacturing and sales. We specialize in producing a wide range of plastic packaging bags, including OPP bags, CPP bags, and PE bags.
Rich Products
Dalian Yuanhe Paper & Plastic Co., Ltd. is a leading company specializing in producing a wide range of plastic packaging bags, including OPP self-adhesive bags, OPP flat bags, OPP buckle handbags, cellophane rolls, transparent book covers, anti-fog bags, Various flexible packaging products such as dry cleaner packaging bags, card head bags, CPP bags, PE bags, detachable bags, composite bags, food bags, etc.
Quality Control
Our factory environment, management system and product quality all meet the Japanese factory system qualification standards, thus we have more than 400 specifications of goods shipped to the Japanese market, ensuring the supply and demand of existing customers.
One-Stop Service
There is no intermediate link when ordering products from our company. We provide one-stop service from design, processing, sample trial production to mass production.
Leading Service
We have many years of industry experience, a complete production management, quality supervision, and sales service operation system. Whether you're looking for packaging for your food products, cosmetics, or other merchandise, we have the expertise and resources to help you find the perfect solution.
Introduction of OPP Self-Adhesive Bag
OPP Self-Adhesive Bags, also known as self-sealing bags, are a type of plastic bag that is widely used in various industries. OPP stands for Oriented Polypropylene, a thermoplastic polymer that is widely used in packaging due to its durability, clarity, and flexibility. These bags are designed to be easy to use, secure, and convenient for both customers and businesses.
OPP self-adhesive bags are a kind of self-adhesive packaging bags made of transparent plastic material, and they come with peel-and-seal adhesive closure for easy folding and packing. These bags are perfect for products like small size cosmetics, clothing, foodstuffs like buns and pastries, and stationeries like craft papers, with the following characteristics and advantages:
Versatility
Clear self-sealing poly bags are available in various sizes and can be used to package a wide variety of items, such as food, jewelry, cosmetics, and office supplies. Whether you need a small bag for individual items or a larger bag for bulk packaging, there is a self-adhesive poly bag option available to suit your requirements. This versatility makes them a good choice for many businesses.
Protection
Clear self-sealing poly bags are made of a durable plastic material that protects against dust, dirt, moisture, and other environmental factors that can damage your products. They are also tamper-evident, which means you can easily tell if someone has opened the bag before reaching its intended recipient.
Ease of Use
Unlike traditional packaging methods that require heat sealing or the use of tape, OPP self-adhesive bags can be sealed simply by removing the protective strip and pressing the adhesive sides together. It saves time and makes the packaging process more efficient. This makes them a popular choice for businesses and individuals who require a quick and efficient packaging solution.
Eco-Friendly
The polyethylene material used in OPP self-adhesive bag is recyclable, meaning that they can be reused or repurposed after use. This helps to reduce waste and minimize the impact on the environment.
Cost-Effective
Clear self-sealing poly bags are an affordable packaging solution. They are generally less expensive than other packaging materials, such as boxes or envelopes, which can help you save money on your packaging costs.
Branding
Clear self-sealing poly bags can be customized with your company’s logo, slogan, or other branding elements. It can help you increase brand recognition and create a professional, cohesive look for your products. This can help businesses to establish a strong brand identity and make a lasting impression on customers.
OPP Self-Adhesive Bags are widely used in daily life because of their remarkable characteristics. They often play an important role in storing food, organizing clothes, jewelry, and cosmetics, and organizing electronic items.
Store Food
OPP Self-Adhesive Bags stand the dramatic FDA appraisal for food contact, which makes them perfectly suitable to be used for food items such as candies, snacks, and baked goods. The plastic pouches maintain the nature and quality of the products at all times amidst keeping off contaminants.
Organize Clothing
OPP Self-Adhesive Bags play to their strengths when organizing laundry. The clothes are kept out of dust and humid air in a OPP Self-Adhesive Bag. When you travel, you can use different sizes of pouches to sort your clothes, so that you can easily find and identify the clothes you need when wearing them. When it’s time to pack after a business trip, OPP Self-Adhesive Bags can be used to separate clean and dirty clothes.
Pack Jewelry and Cosmetics
There are appropriate-size OPP Self-Adhesive Bags for packaging for earrings, brooches, bracelets, necklaces, and other large ornaments. Using a OPP Self-Adhesive Bag to package the jewelry keeps the jewelry away from dust and prevents the jewelry from being damaged by friction with other things. OPP Self-Adhesive Bags are also widely used in cosmetic packaging, such as packaging lipstick, mascara, eyeliner, and so on.
Package Medication
Due to their good sealing, OPP Self-Adhesive Bags are also commonly used to package and store medication. Using medicine OPP Self-Adhesive Bags can maintain the effectiveness of the medicine from being degraded by moist air and moisture. If the pills are filled in a transparent bag, we can easily see the true appearance of the pills, which is easy to distinguish the type of medicine.
Organize Electronic Gadgets
OPP Self-Adhesive Bags can help you quickly tidy up electronic products. The bags allow you to ensure the visibility of your electronics, and it can keep your electronic gadgets safe from water damage.
Manufacturing Process of OPP Self-Adhesive Bag
The OPP Self-Adhesive Bag manufacturing process involves a series of intricate steps, each contributing to the bag’s final form. Let’s have a closer look at the production process of OPP Self-Adhesive Bag.
From Polymers to Resin Pellets
Polymers are the raw materials, often coming from natural gas or crude oil, that are the starting point for your plastic bag. Before they become the OPP Self-Adhesive Bags, they’ve got to go through a glow-up. These polymers are turned into what we call plastic resin pellets, which are the basic units that will eventually assemble into OPP Self-Adhesive Bag. First, the raw polymers get a spa treatment of heat and pressure in some fancy machines. This breaks down their complicated chains into simpler, more manageable forms. Then, they’re shaped into small, cylindrical pellets. These pellets are the go-to material for the next steps because they’re consistent and easy to work with.
Crafting the Plastic Film from Extruder
The resin pellets are loaded into an extruder, a machine that’s about to give our plastic bag its shape. The extruder works by melting the resin pellets. This molten plastic is then forced through a circular die, which shapes it into a continuous tube of thin plastic film. As the plastic exits the extruder, it’s cooled down rapidly using cold air or water. This sudden cooling solidifies the plastic, turning it into a film. The thickness of this film can be adjusted based on the desired properties of the final bag.
Coloring and Adding Additives
Dyes are mixed with the molten plastic before it’s extruded, ensuring an even color throughout the film. Whether you want a vibrant red or a subtle blue, it’s all about getting the right mix of dyes. But color isn’t the only thing added to our bags. Additives play a crucial role in enhancing the properties of the plastic.
Cooling and Setting the Film
Once the plastic exits the extruder, it’s in a somewhat vulnerable state. It’s warm, malleable, and not yet in its final form. This is where the cooling process comes into play. Cooling isn’t just about bringing the temperature down; it’s about ensuring the plastic sets correctly, maintaining its desired thickness and strength. Air-cooling systems blow cold air onto the film, solidifying it rapidly. In some cases, water cooling systems are used, where the film is passed over chilled rollers. This rapid cooling is crucial. If the film cools too slowly, it can become uneven or develop imperfections. During this phase, rollers also play a pivotal role. They ensure the film is stretched uniformly, preventing any wrinkles or folds. It’s a delicate balance of temperature and tension, ensuring the film is just right.
Cutting and Sealing
With our film set and ready, it’s time to transform it into recognizable bags. The film is fed into machines that cut it at regular intervals, determining the bag’s length. But a bag isn’t just about length; it needs a base. This is where sealing comes into play. The bottom of each cut section is sealed using heat. This heat fuses the plastic together, creating a strong bond that forms the bag’s base. It’s essential this seal is robust; it’s what gives the bag its carrying capacity.The top remains open, ready for use. Apply a thin layer of self-adhesive glue to one side of the bag to ensure the bag is self-adhesive.
Quality Control
Each batch of bags undergoes a series of tests. The thickness of the bags is measured to ensure uniformity. Strength tests are also paramount. Bags are filled and stretched to their limits, ensuring they meet the standards set by manufacturers. Other tests might include exposure to UV light (to check resistance to sun damage) or moisture tests (to verify the bag’s ability to repel water).
Factors to Consider When Choosing OPP Self-Adhesive Bags
When choosing an OPP Self-Adhesive Bag, you need to consider multiple factors, including material, sealing, size, thickness, transparency, quality assurance, price and environmental protection. Choose according to actual needs and find the OPP Self-Adhesive Bag that best suits you.
Sealing
The sealing of the OPP Self-Adhesive Bag is related to the material and structure. A qualified self-adhesive bag should be able to seal perfectly without air or liquid leakage. You can judge the sealing performance by checking the bag's texture, sealing strip and other parts.
Size
Choose an OPP Self-Adhesive Bag of appropriate size based on the size and quantity of items you actually need to store. OPP Self-Adhesive Bags that are too large or too small are not conducive to storing items and can easily cause waste.
Thickness
The thickness of an OPP Self-Adhesive Bag also affects its durability. Thicker OPP Self-Adhesive Bags are generally more durable and able to withstand more pressure and friction. But at the same time, an OPP Self-Adhesive Bag that is too thick may appear too heavy and is not conducive to use.
Transparency
The higher the transparency of the OPP Self-Adhesive Bag, the easier it is to view the contents of the bag. This allows for better management and access to items. Additionally, transparent bags are ideal for retail products where a clear view of the contents is necessary for display and inspection purposes, while opaque bags provide privacy and security for shipping sensitive, or private items.
Quality assurance
Choosing an OPP Self-Adhesive Bag produced by a regular brand or manufacturer can better ensure quality and safety. At the same time, you should also pay attention to check whether the product has relevant quality certification and safety standards.
Price
The price of the OPP Self-Adhesive Bag is also one of the factors that needs to be considered. On the premise of ensuring quality, you can choose products with high cost performance to save costs.
Environmental protection
If you are concerned about environmental protection, you can choose a degradable or environmentally friendly OPP Self-Adhesive Bag. Such products are often made from renewable resources or recyclable materials and have a low impact on the environment.
OPP Self-Adhesive Bags
OPP is short for oriented polypropylene. They're like BOPP self-adhesive bags in that they're strong and resistant to tearing and moisture. They also have a high resistance to heat, making them a good option for food products. However, OPP self-adhesive bags are more flexible than BOPP self-adhesive bags, making them easier to open. They're also transparent, so your product will be visible inside the bag. Their high tensile strength makes them ideal for products that are likely to get handled roughly. Like BOPP self-adhesive bags, OPP self-adhesive bags are not biodegradable. And because they're more flexible than BOPP self-adhesive bags, they offer less protection against crushing and impact damage.
BOPP Self-Adhesive Bags
BOPP self-adhesive bags contain biaxially-oriented polypropylene. They're strong and resistant to tearing, making them a good option for products that are likely to get handled roughly. BOPP self-adhesive bags also have a high resistance to moisture and heat, so they're a good choice for food products that need to stay fresh. One downside of BOPP self-adhesive bags is that they're not biodegradable. BOPP self-adhesive bags are also not transparent, so if you need your product to be visible, you'll need to choose a different type of packaging.
PP Self-Adhesive Bags
PP bags contain polypropylene. They offer similar benefits to BOPP and OPP self-adhesive bags in terms of strength and resistance to moisture and heat. However, PP self-adhesive bags are more rigid than BOPP and OPP self-adhesive bags, offering more protection against crushing and impact damage. They're also transparent, like OPP self-adhesive bags, so your product will be visible inside the bag. One downside of PP self-adhesive bags is that they're not as easy to open as OPP self-adhesive bags. And like both BOPP and OPP self-adhesive bags, they're not biodegradable.
Common Mistakes to Avoid
Overstuffed OPP Self-Adhesive Bags
Avoid the urge to fill your OPP self-adhesive bags past the point of capacity. By weakening the seal caused by overfilling, leaks, and spills may result. Additionally, it could be challenging to shut the bag securely, endangering the organization and freshness of your products. Instead, choose the right bag size to guarantee a tight seal and simple storage.
Seal the OPP Self-Adhesive Bags Incorrectly
Failure to correctly close the OPP self-adhesive bag can cause devastating leaks and spoilage—a small but huge error. Ensure the OPP self-adhesive bag is shut tightly, and, especially when keeping food products, consider “burping” the bag to eliminate extra air. Before storing the bag, give it one more look over for holes or weak seals.
Using Damaged or Worn-Out OPP Self-Adhesive Bags
It is dangerous to keep using OPP self-adhesive bags with holes, rips, or poor seals. Their propensity for leaks and contamination defeats the idea of utilizing damaged bags for storage or food preservation. To prevent mishaps, replace the bag with a fresh one whenever you see any indications of wear and tear.
Storing Incompatible Items Together
Be careful while storing anything in OPP self-adhesive bags. For instance, pairing strongly scented goods with food might transfer offensive scents, and putting sharp tools with fragile products can result in harm. To ensure that each bag fulfills its purpose, segregate goods that won't go together.
Our Factory
Our factor mainly produces various plastic packaging bags, OPP self-adhesive bags, OPP cello bags and various flexible packaging products such as dry cleaner packaging bags, etc. After more than ten years of development, it has become a leader in the plastic flexible packaging industry and a leader in the fusing industry.
Ultimate FAQ Guide to Cellophane
As one of the most professional OPP self-adhesive bag manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to wholesale cheap OPP self-adhesive bag made in China here from our factory. For customized service, contact us now.
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