Custom packaging bags, whatever you want, we can make it happen!

With a wide variety of types and exquisite appearance, plastic packaging bags, with their excellent comprehensive performance, are replacing traditional packaging with an unstoppable development trend. The annual growth rate of plastic packaging bag consumption has been and will be higher than other packaging methods in the past and future. Its usage rate is not only increasing faster than paper packaging, glass packaging, metal packaging, etc., but also higher than plastic hard packaging.

 

Plastic packaging bags are playing an increasingly important role in the entire packaging field. In recent years, the soft packaging industry has developed rapidly, and it has also strongly promoted the progress of the clothing, food, daily chemical and pharmaceutical industries. The progress of these industries has in turn further stimulated the market demand for plastic packaging bags. Data provided by the famous American business communication company (BCC) in the special report "Changing Plastic Packaging Industry" shows that "the total consumption of plastic packaging bags in the world reached 6.31 million tons in 2001 alone, and the largest current consumption is food packaging bags and clothing packaging bags."

Due to its good comprehensive performance and performance-price ratio, the market for plastic packaging bags has become one of the fastest-growing varieties in packaging. Although plastic packaging bags cannot represent the intrinsic quality of the product, the quality of the packaging directly affects the quality grade and market sales of the product. Good packaging can ensure and extend the quality and service life of the product, and excellent packaging can also win reputation for the product and provide consumers with a guarantee for choosing products. It can be said that good packaging is a panacea for products.

 

Many companies, when upgrading their product packaging, want to know whether the production processes and materials of plastic packaging bags can meet their needs. Today, Shunxingyuan Packaging (www.dgsunpak.cn), a professional soft packaging manufacturer, will use its rich industry experience to prepare a detailed packaging production knowledge for you. Let's see if you have missed anything?

1. Production Process

 

2. Printing

Rotogravure printing: refers to making the text and patterns on the original into a printing plate, applying ink to the surface of the printing plate, and transferring the pictures and texts on the printing plate to the surface of the printed material through pressure to accurately and massively reproduce prints that are the same as the original.

Surface printing and inner printing.

3. Lamination

Basic principle of plastic composite soft packaging: Each material has different advantages and disadvantages. By using a medium (such as glue) to bond two or more layers of materials together, the packaging film and bag can achieve better performance. This technology is called "lamination process" in the production process.

4. Curing

The purpose of curing is to accelerate the curing speed of the glue between materials.

5. Slitting

The printed and laminated materials are slit into the specifications required by the customer.

6. Bag Making

The printed, laminated, and slit materials are made into various bags required by customers. Various bag types can be produced: center-seal bags, side-seal bags, stand-up pouches, K-seal bags, R bags, quad-seal bags, zipper bags.

7. Quality Control

1. Raw material inspection before warehousing

2. Online product inspection

Printed product inspection - residual solvent, registration, etc.

Laminated product inspection - lamination strength, bubbles, wrinkles, etc.

Bag making product inspection - sealing strength, dimensional deviation, etc.

3. Product inspection before shipment

8. Commonly Used Printing Materials

BOPP

Biaxially oriented polypropylene, it is a film formed after biaxial orientation, it has no heat-sealing performance, and is often used as a printing material. Because of its excellent moisture-proof performance, it is suitable for the surface printing material of moisture-absorbing biscuits, dried fruits, puffed foods, melon seeds, etc.

KOP

Coated biaxially oriented polypropylene, a layer of about 1-2um polyvinylidene chloride (PVDC, also known as K coating) is coated on the surface of OPP, so KOP has both the properties of OPP and the advantages of PVDC. It is often used for mooncakes and other foods that require oxygen and water barriers. KOP has a similar barrier function to aluminum foil, but it is transparent and the contents of the packaging can be seen.

PCO

Biaxially heat-sealable polypropylene film, it has the properties of OPP and the properties of double-sided heat sealing; it is often used for packaging of disks and laver.

PL

Biaxially oriented polypropylene pearlescent film, it is made of polypropylene resin as the main raw material, with a certain amount of pearlescent powder, and biaxially oriented. Used for packaging of cosmetics, soap, labels, etc.

PET

Polyester film

Like OPP, it is a secondary biaxially oriented film that is longitudinally stretched and then transversely stretched, or stretched longitudinally and transversely at the same time, and then heat-set. It is often used as a printing material for machine packaging rolls, high-temperature cooking bags, zipper bags, etc.

KPET

Chinese name: Coated polyester film, a layer of about 1-2um polyvinylidene chloride (PVDC, also known as K coating) is coated on the surface of PET.

Therefore, KPET has both the properties of PET and the advantages of PVDC. It is often used for mooncakes and other foods that require oxygen and water barriers. Like KOP, it has a similar barrier function to aluminum foil, but it is transparent and the contents of the packaging can be seen. Its excellent high-temperature resistance makes it more suitable for machine packaging and other bag types that require high high-temperature resistance.

NY

Nylon, vacuum packaging, freezing, high-temperature cooking food packaging; commonly used thickness is 15um, because it is very thin, it makes a rattling sound when shaken; density is 1.15g/cm3.

PVC

Polyvinyl chloride, generally used for bottle labels, single-layer material, no lamination is required after printing, PVC glue (alcohol and cyclohexanone 1:1 ratio) needs to be used for bonding; commonly used thickness: 40um.

Mat-opp

Biaxially oriented polypropylene matte film, commonly used in the packaging of puffed foods, mooncakes, paper towels, and cosmetics.

IX. Commonly Used Composite Materials

CPP

Unoriented polypropylene. Unlike the stretched OPP, CPP is cooled and solidified in its original state after film formation. CPP is the most commonly used heat-sealing material. As a printing material, it is often used for paper towel packaging; as a composite material, it is often used in combination with other materials as a heat-sealing layer.

PET

Unoriented polyethylene. Commonly used PE includes IPE, CPE, LLDPE, and ordinary PE. Like CPP, it is the most commonly used heat-sealing material. Used in packaging dairy products, shampoos, detergents, and other chemical products. In addition to being used as a surface printing material, it can also be used as a composite material. It does not have heat-sealing properties and cannot be placed in the heat-sealing layer. It is generally used as an intermediate composite layer in products, which can increase the stiffness and oxygen barrier properties of the bag.

VMPET

Aluminum-plated polyester film, which is an aluminum foil vapor-deposited on the surface of PET, combining the properties of PET and aluminum foil.

VMCPP

Aluminum-plated unoriented polypropylene, which is an aluminum foil vapor-deposited on the surface of CPP, combining the properties of CPP and AL.

AL

Aluminum foil, with excellent insulation and light-shielding properties. Aluminum foil itself has low strength and no heat-bonding properties, and is prone to breakage at folds, so it is rarely used alone. It is generally used for products that are very sensitive to oxygen and moisture, and in high-end composite flexible packaging, it has very good moisture-proof, oxygen-proof, and UV-proof properties.

NY

Nylon. In addition to being used as a surface printing material, it can also be used as a composite material. It does not have heat-sealing properties and cannot be placed in the heat-sealing layer. It is generally used as an intermediate composite layer in products, which can increase the sealing strength and puncture resistance of the bag; it is often used in the middle layer of bags that require pressure resistance and high-temperature sterilization. For example, jelly bags, detergent bags, chestnut bags, etc. Its oil resistance makes it suitable for packaging meat and other high-oil products.

X. Professional Recommendations for Plastic Packaging Bags:

Shunxingyuan Packaging has been engaged in the packaging industry for 19 years. Focus leads to professionalism. Since its establishment, the company has always adhered to the principle of "mutual cooperation, mutual benefit, and common development," constantly striving for excellence, refinement, and strength, and leading the flexible packaging industry. Shunxingyuan Packaging's customers are spread across many countries around the world, with well-known brands such as ADIDAS, AAPE, IZZUE, I.T, and Calvin Klein as deep cooperation partners.

Reasonable Pricing: Shunxingyuan Packaging can provide customers with the most comprehensive and reasonable quotations based on different materials and processes.

Exquisite Printing: Shunxingyuan Packaging adheres to a meticulous style, with a large number of professional masters with more than 20 years of experience in color matching and printing, and professional quality inspectors to check the quality of the printing surface, ensuring that every detail of the packaging bag is exquisite and beautiful.

High Efficiency: Shunxingyuan Packaging is adept at coordinating the supply chain and has a complete process from order entry to finished product delivery, truly achieving high efficiency from raw material supply to finished product delivery, saving customers a lot of time costs.

Excellent Service: Shunxingyuan Packaging is good at capturing customer needs, and based on the principle of maximizing customer convenience, it saves costs as much as possible in material selection and controls every production link, aiming to improve product satisfaction from 99% to 100%.

Any cooperation is not without reason. Shunxingyuan Packaging, from the production environment and raw material selection to the control of each production link, aims to improve product satisfaction from 99% to 100%, and will continue to persevere! Whether you are in the clothing and apparel, food, chemical, home furnishing gifts, electronics, or other industries, please say goodbye to fighting alone. Shunxingyuan Packaging, your caring partner, is with you 24/7.