How to choose suitable industrial paper materials in different fields of packaging industry?
Guide for Selection of Industrial Paper Materials in Different Fields of Packaging Industry (Accurately Adapting to Scene Requirements)
The core of industrial paper material selection is to match the core demands of packaging scenes (such as protection level, environmental adaptability, compliance requirements and cost budget), and realize "functional adaptation+cost optimization" in combination with material characteristics (strength, cushioning, moisture-proof, rust prevention, environmental protection, etc.). According to the core application fields of the packaging industry, the selection logic, recommended materials and practical cases are dismantled in detail, covering mainstream scenes such as machinery manufacturing, electronic appliances, logistics e-commerce, chemical building materials and food cold chain.
I machinery manufacturing/equipment packaging field (core demands: heavy protection, loss prevention and rust prevention, and export compliance)
Typical scene
Heavy equipment: optical glass processing machine, automatic production line parts, non-standard oil cylinders, machine tools.
Precision parts: gears, bearings, fasteners, machined customized parts (export/long-term storage)
Transportation environment: long-distance sea transportation (salt fog, humidity) and multi-link handling (collision, stacking and extrusion).
Selection logic
Give priority to ensuring high-strength compression resistance, shock absorption, rust prevention and moisture prevention, and at the same time meet the export environmental protection requirements (avoid wood packaging fumigation).
Whole machine packaging of heavy equipment
Recommended materials: three corrugated boxes (7 layers)+honeycomb paperboard lining+paper corner protector.
Characteristics: The compressive strength of three corrugated boxes is ≥ 15,000 N, the cushioning performance of honeycomb paperboard is five times that of ordinary corrugated paper, and the corner protection is strengthened by paper corner protection to prevent stacking extrusion deformation.
Case: Kunshan Gaoli Seiko's export packaging of non-standard oil cylinder adopts 7-layer double corrugated boxes (A+B tiles)+customized honeycomb cardboard fixing seats+paper corner protectors to wrap both ends of the cylinder, which has no deformation and damage during sea transportation and meets the EU environmental protection standards (no fumigation is required).
Alternative: Honeycomb paper pallet (bearing 500-2,000 kg) is used to replace wooden pallet for equipment base packaging, so as to reduce logistics weight cost and avoid overseas customs quarantine barriers.
Storage/transport packaging of precision parts
Recommended materials: VCI)+ kraft paper bubble film+small corrugated box.
Characteristics: Vapor-phase antirust paper volatilizes antirust agent, forming a protective film on the metal surface (antirust period is 1-2 years), no antirust oil is needed, and it is environmentally friendly and easy to clean; Kraft paper bubble film has both buffering and scratch-proof functions.
Application: metal parts such as bearings, gears, precision screws, etc., especially suitable for export by sea (salt spray corrosion prevention) and long-term inventory (more than 1 year).
Supplementary material: pulp molded lining (integrally formed, conforming to the outline of parts), used for packaging optical glass lenses and precision instrument accessories to avoid displacement and collision during transportation.
Economical internal turnover packaging
Recommended material: recycled corrugated box (3-5 layers)+corrugated paper filling.
Features: The cost of recycled paper is 30% lower than that of virgin paper, which is suitable for parts turnover in the workshop and short-distance transportation without export. Crepe paper can fill the gap and provide simple buffer protection.
Second, the field of electronic and electrical packaging (core appeal: scratch-proof, anti-static, accurate buffering and neat appearance)
Typical scene
Consumer electronics: mobile phones, computers, home appliances (refrigerators, air conditioners), display screens.
Industrial electronics: PCB, sensors, electronic components, frequency converters.
Transportation requirements: lightweight protection (to avoid product weight gain), electrostatic protection (sensitive electronic components) and scratch protection (external parts).
Selection logic
Balance cushioning accuracy, electrostatic protection and appearance protection, and give priority to materials with light weight and high cleanliness.
Consumer electronics packaging
Recommended materials: E/F thin corrugated box (3-5 layers)+molded pulp lining+kraft paper protective film.
Features: E/F corrugated is thin and hard, and the carton has a flat appearance, which is suitable for printing brand logo；; Pulp molding accurately fits the contours of products (such as mobile phones and household appliances), which is cushioning and environmentally friendly; Kraft paper protective film is scratch-proof, which is in line with environmental protection trend instead of plastic film.
Case: A brand air conditioner is packaged with 5-layer E-shaped corrugated box (compressive strength ≥8000N)+ pulp molding fixed base+kraft paper to wrap the fuselage. There is no scratch on the appearance during transportation, and the recovery rate can reach 100%.
Electronic components/PCB packaging
Recommended materials: antistatic release paper+conductive kraft paper bag+corrugated box
Characteristics: The surface resistance of antistatic release paper is 10 6-10 9 Ω, which can effectively release static electricity and avoid breakdown of electronic components; The conductive kraft paper bag has strong sealing performance, prevents dust contamination, and is suitable for storage of components in automatic production lines.
Special requirements: High temperature resistant release paper (above 200℃) shall be used as temporary protective carrier for parts related to high temperature process (such as reflow soldering).
Packaging of high-end electronic equipment (such as semiconductor equipment)
Recommended material: aramid paper composite honeycomb panel+antistatic buffer paper.
Characteristics: aramid paper has high temperature resistance and high strength, honeycomb board structure is lightweight, and anti-static buffer paper avoids electrostatic damage, which is suitable for long-distance transportation of high-value and high-sensitive equipment.
Third, the field of logistics e-commerce/general commodity packaging (core appeal: lightweight, low cost, recyclable and suitable for batch packaging)
Typical scene
E-commerce packages: clothing, daily necessities, small household appliances, books.
Commodities: furniture, building materials, food gift boxes.
Requirements: fast packaging, stacked storage, reducing logistics costs, and complying with environmental protection policies.
Selection logic
Priority is given to lightweight, low cost, easy processing, giving consideration to certain cushioning and compression resistance, and supporting printing customization.
E-commerce small package
Recommended materials: 3-layer corrugated box (B/E type)+corrugated paper/bubble paper (paper base)
Features: B/E corrugated box is light, with good printing effect, suitable for express delivery (compressive strength ≥ 3,000 N, meeting the requirement of stacking 3-5 layers); Corrugated paper is low in cost and easy to fill, and it meets the environmental protection requirements of e-commerce platforms instead of plastic bubble film (for example, Taobao and JD.COM's "green packaging" initiative).
Alternative: kraft paper bubble bag (paper-based composite, degradable), which is used for individual packaging of small products such as clothes, books, hardware, etc., is anti-falling and environmentally friendly.
Bulk commodity/furniture packaging
Recommended materials: 5-layer corrugated box (A/B type)+paper corner protector+honeycomb cardboard.
Features: A/B corrugated paper has strong cushioning property, and the compressive strength of 5-layer carton is ≥ 10,000 N, which is suitable for the transportation of furniture and building materials (tiles, doors and windows); The paper protects the corners, and the honeycomb cardboard is cut into customized sizes to fill the gaps to prevent displacement.
Case: The wardrobe packaging of a furniture brand adopts a 5-layer corrugated box+honeycomb cardboard backboard+paper corner protector to wrap the frame, which is not damaged during long-distance transportation, and the carton can be folded and recycled to reduce the storage space.
Food gift box packaging
Recommended materials: coated paper composite corrugated box+food grade kraft paper lining
Features: Coated paper has a smooth surface, which is suitable for printing exquisite patterns (improving the grade of gift boxes); Food-grade kraft paper has no peculiar smell and meets the food safety standard (GB 4806.8). It is used for direct contact with the inner packaging of food (such as tea and cakes).
Four, the field of chemical building materials packaging (core appeal: anti-leakage, moisture-proof, acid and alkali resistance, strong load-bearing)
Typical scene
Chemical raw materials: powder (cement, coating powder), particle (plastic particle, fertilizer), liquid (some chemicals with weak corrosiveness).
Building materials products: tiles, stones, pipes, thermal insulation materials.
Requirements: good sealing, wear resistance, anti-leakage, suitable for automatic filling
Selection logic
Priority is given to high strength, sealing and corrosion resistance, and some scenes need to meet the requirements of moisture and leakage prevention.
Powder/granular chemical raw material packaging
Recommended material: kraft paper bag at valve port (PE coated)
Features: Kraft paper substrate has high strength and tear resistance, PE coating is moisture-proof and leak-proof, and the valve port design is suitable for automatic filling production line (high filling efficiency and strong sealing), which can bear 25-50kg/bag.
Application: cement, fertilizer, plastic particles, feed, etc., which meet the requirements of "pollution prevention and easy transportation" in the chemical industry.
Upgrade plan: Paper-plastic composite bag (kraft paper+plastic film composite) is more resistant to acid and alkali corrosion and suitable for packaging chemical powders (such as coating powder and talcum powder).
Packaging of building materials products (tiles, stones)
Recommended materials: honeycomb cardboard+kraft paper packaging+paper corner protector
Features: Honeycomb cardboard has high compressive strength (5 times that of corrugated paper under the same weight), and can be cut into customized sizes to fit the surface of ceramic tile/stone. The corner protection is strengthened by paper corner protection to avoid corner damage during handling; Kraft paper packaging printing product information, environmental protection and recycling.
Alternative: Recycled corrugated boxes (5-7 layers) and corrugated paper filling are suitable for low-end building materials and reduce packaging costs.
Tubing/insulation packaging
Recommended material: wrapped kraft paper+corrugated sleeve
Features: The winding kraft paper is wear-resistant, which can tightly wrap the surface of the pipe and prevent scratching; Corrugated paper sleeves are sleeved at both ends of the pipe to protect the port from deformation and are suitable for long-distance transportation.
V. Food cold chain packaging field (core demands: low-temperature weatherability, moisture-proof, thermal insulation assistance, food safety)
Typical scene
Frozen food: meat, seafood and quick-frozen dumplings (stored and transported below -18℃).
Frozen food: fruits, vegetables and dairy products (stored and transported at 0-10℃).
Requirements: Maintain strength, moisture-proof, no peculiar smell and meet food contact safety in low temperature environment.
Selection logic
Priority is given to low-temperature weather resistance, moisture resistance and food-grade safety, and it is used in conjunction with thermal insulation materials (such as EPS and vacuum insulation board) to ensure the stability of the cold chain.
Frozen food packaging (below -18℃)
Recommended materials: low temperature corrugated box (GB/T 31550-2015 standard)+food grade kraft paper lining.
Characteristics: Low-temperature corrugated box is made of low-temperature resistant base paper, which still maintains compressive strength (≥8000N) at-18℃ without brittle crack; Food-grade kraft paper has no peculiar smell, conforms to GB 4806.8 standard and is in direct contact with frozen food.
Case: The frozen shrimp packaging of a seafood brand adopts five-layer low-temperature corrugated box+food-grade kraft paper inner bag+ice bag, and the carton in the cold chain of shipping has no deformation and food is pollution-free.
Refrigerated food packaging (0-10℃)
Recommended material: PE coated corrugated box+breathable kraft paper
Features: PE film coating is moisture-proof (avoiding the softening of cartons caused by condensation in cold storage environment), and breathable kraft paper keeps food breathable (such as fruits and vegetables) to prevent mildew; The compressive strength of corrugated boxes is ≥ 500N, which meets the requirements of cold chain stacking storage.
Food gift box (cold chain)
Recommended materials: coated paper composite corrugated box+food-grade oil-proof paper
Features: Coated paper is beautifully printed, with the help of composite corrugated layer for heat preservation, and it is moisture-proof and oil-proof (such as moon cakes and cake gift boxes), which is in line with food contact safety and has a high appearance.
