Plastic packaging bag production process and customized recommendations, give your product a new look

Many companies, when upgrading their product packaging, want to know if the production processes and materials of plastic packaging bags can meet their needs. Today, Shunxingyuan Packaging, a professional flexible packaging manufacturer, will use its rich industry experience to provide you with a detailed overview of basic knowledge. Let's see if you've missed anything?

I. Plastic Packaging Bag Production Process

1 Production Process

2 Printing

Rotogravure printing: This refers to the process of making the text and patterns on the original into a printing plate, applying ink to the surface of the printing plate, and transferring the graphics and text on the printing plate to the surface of the printed material through pressure, accurately and massively replicating prints identical to the original.

Surface printing and reverse printing.

3 Lamination

Basic principle of plastic composite flexible 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 achieve better performance. This technology is called "lamination" in the production process.

4 Curing

The purpose of curing is to accelerate the curing speed of the adhesive 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 the customer. 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 does not have heat-sealing properties, and is commonly used as a printing material. Due to its excellent moisture-proof properties, it is suitable for surface printing materials for hygroscopic foods such as biscuits, dried fruits, puffed foods, and melon seeds.

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 it has both OPP properties and PVDC advantages. Commonly used for mooncakes and other foods that require oxygen and water barriers. KOP It has a similar barrier function to aluminum foil, is transparent, and allows the contents of the packaging to be seen.

PCO

Biaxially heat-sealable polypropylene film, it has the properties of OPP and also has double-sided heat-sealing properties; commonly used for packaging of disks and seaweed.

PL

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

PET

Polyester film

Like OPP, it is a secondary biaxially oriented film that is stretched longitudinally and then transversely, or stretched longitudinally and transversely simultaneously, and then heat-set. Commonly used as printing materials for machine packaging rolls, high-temperature cooking bags, and zipper bags.

KPET

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

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

NY

Nylon, vacuum packaging, freezing, and high-temperature cooking food packaging; the commonly used thickness is 15um, because it is very thin, it makes a rattling sound when shaken; the 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) is required for bonding; commonly used thickness: 40um。

Mat-opp

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

9 Commonly Used Composite Materials

CPP

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

PET

Unstretched polyethylene, commonly used PE includes IPE 、 CPE 、 LLDPE ，ordinary PE 。and CPP It is also the most commonly used heat-sealing material. Used for packaging milk powder, shampoo, washing powder and other chemical products. In addition to being commonly 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 for products, which can increase the stiffness and oxygen barrier properties of the bag.

VMPET

Aluminum-plated polyester film, which is a layer of aluminum foil vapor-deposited on the surface of PET, with both PET properties, and also the properties of aluminum foil.

VMCPP

Aluminum-plated unstretched polypropylene, which is a layer of aluminum foil vapor-deposited on the surface of CPP, with both CPP and AL properties.

AL

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

NY

Nylon, in addition to being commonly used as a surface printing material, 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 for products, which can increase the sealing strength and puncture resistance of the bag; it is often used in the middle layer of bags that need to withstand pressure and high-temperature sterilization. For example, jelly bags, detergent bags, chestnut bags, etc. Its oil resistance makes it suitable for packaging meat and other heavier oily products.

II. Recommended Original Manufacturers of Custom Plastic Packaging Bags

Dongguan Shunxingyuan Packaging Products Co., Ltd. has been specializing in the packaging industry for 19 years and has strong R&D, design, and production capabilities. 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 and leading the flexible packaging industry. It specializes in producing various types of plastic bags for various industries, including clothing and apparel, food, chemicals, home gifts, and electronics. In addition, Dongguan Shunxingyuan Packaging Products Co., Ltd. invests a large amount of funds and manpower in product R&D every year, and has applied for many new patents. At the same time, the company also attaches great importance to internal optimization of production processes, staff training, and improvement of core competitiveness. Dongguan Shunxingyuan Packaging Products Co., Ltd.'s customers are located in many countries around the world, ADIDAS 、 AAPE 、 IZZUE 、I.T、 Calvin Klein 、 Masco ，Chicken Chick, LEE, etc. are all well-known brands with deep cooperation.

Shunxingyuan Packaging Bag Family

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Shunxingyuan Hardware Packaging Bags

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Shunxingyuan Zipper Bags

Shunxingyuan Packaging Exclusive Advantages

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

Exquisite printing: Shunxingyuan Packaging adheres to a refined 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.

High efficiency: Shunxingyuan Packaging is good 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, controls every production link, and strives to improve product satisfaction from 99% to 100%。

Since its establishment, Shunxingyuan Packaging has adhered to the principle of "quality is life, service first," striving for excellence to meet all customer requirements and striving to create a series of packaging products that are closest to customer needs. Shunxingyuan Packaging products have exquisite printing, good texture, and can be customized according to customer needs, Calvin Klein ，Chicken Chick, I.T and other major clothing brands have also focused on the characteristics of Shunxingyuan Packaging, and after meeting Shunxingyuan Packaging, they resolutely launched continuous cooperation.

Dongguan Shunxingyuan Packaging Products Co., Ltd., as an original factory, provides you with a complete set of packaging solutions. Welcome new and old customers to visit and negotiate (13549297179).

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