Pulp Molded Packaging – Green Solution
Among the numerous green packaging solutions, pulp molded package and molded pulp equipment are like bright new stars, emerging in various fields with its unique features and extraordinary performance. From delicate and fragile electronic products to daily catering supplies, from high-end porcelain to various daily necessities, the application cases of various pulp molding products are showing us their infinite possibilities in the field of modern packaging.
Applications Of Pulp Molding Packaging Types
- Food packaging:
Pulp molded food packaging includes fast food and food packaging (fast food boxes, beverage cups, cup lids, coffee trays, take-away boxes, etc.), supermarket food packaging (vegetables, fruits, meat, seafood, etc.), quick-frozen food packaging (dumplings, steamed buns, glutinous rice balls), dried fruit packaging, biscuit packaging, cheese packaging, etc. - Agricultural product packaging:
Paper tray for agricultural product packaging includes original egg packaging, fruit packaging, vegetable and meat packaging, etc. - Seedling series product packaging：
Paper trays for seedling raising, including seedling trays, rice seedling trays, e-commerce flower trays, functional seedling raising matrices, such as: desert water-retaining seedling trays, saline-alkali land seedling trays, balcony seedling raising matrices, etc. - Industrial product packaging：
Pulp molded industrial packaging, including luxury goods packaging, cosmetics packaging, electronic product packaging, small household appliances packaging, heavy product packaging, chemical product packaging, logistics packaging, e-commerce buffer packaging, fashion fast-moving consumer goods packaging, etc. - Cultural and creative product packaging：
Paper tray customized by cultural and creative products, gifts, educational supplies and tourist souvenirs. - Container product packaging：
Pulp molded container packaging products, including detergent packaging, wine packaging, water packaging, yogurt packaging, medicine packaging bottles, milk powder packaging bottles, milk powder spoons, etc.
Pulp Molded Package Production Solutions
Paper tray production equipment of the 6 categories above is slightly different from the aspects of raw materials, mold design, molding process, etc. The following is a detailed comparative analysis.
Food Packaging Paper Tray Production Solution
Raw material requirements:
- It must comply with food-grade safety standards (such as FDA, GB 4806, etc.), and commonly used biodegradable materials include sugarcane pulp, bamboo pulp, food-grade wood pulp, etc.
- Quick-frozen food packaging must add moisture-proof agents or use film coating technology to withstand low temperatures (below -18°C).
- Beverage cups/lids need to be waterproof and oil-proof, and may have PE coating or PLA coating added.
Mold design:
- Fine structure: The fast food box needs to be lightweight but pressure-resistant, and the cup lid needs a sealed groove design.
- Quick-frozen food packaging needs to reserve space for expansion (such as the anti-sticking structure of the rice ball tray).
Equipment Features
- High temperature and high pressure sterilization module (some products require sterile production).
- High-precision hot pressing machine and edge cutting shaping equipment (ensuring tightness and surface smoothness).
Agricultural Product Packaging Production Solution
Raw material requirements
- Mainly made of natural fiber raw materials (such as straw pulp and wheat straw pulp), it emphasizes environmental protection.
- Egg/fruit paper tray packaging requires high cushioning and may add corrugated pulp to strengthen the structure.
Mold design
- Egg trays need honeycomb grooves for shock absorption, and meat packaging needs air holes.
- Fruit and vegetable packaging needs to have a porous and breathable structure to prevent moisture accumulation.
Equipment Features
- Rapid drying equipment (to prevent agricultural product packaging from getting moldy).
- Low-density molding technology (lightweight to reduce transportation costs).
Seedling Series Product Packaging Solution
Raw material requirements
- Mainly functional materials: Desert water-retaining trays need to be added with water-retaining agents (such as high molecular water-absorbing resins), and saline-alkali land seedling trays require corrosion-resistant fibers.
- The seedling medium needs to be mixed with organic matter (such as coconut bran and peat soil).
Mold design
- The seedling tray needs to be designed with a grid to support root penetration.
- The balcony seedling substrate tray needs to be a lightweight and foldable structure.
Equipment Features
- Mixing and stirring module (homogeneous mixing of matrix and fibers).
- Equipment for spraying biodegradable coatings (accelerates natural decomposition).
Industrial Product Packaging Production Solution
Raw material requirements
- High-strength pulp (such as kraft pulp, mixed recycled fibers) or composite fibers (added carbon fiber reinforcement).
- Heavy-duty packaging requires a multi-layer composite structure (pulp + corrugated paper core).
Mold design
- Luxury goods/cosmetics packaging requires high-precision embossing or hot stamping molds.
- Cushioning packaging requires a honeycomb structure or a corrugated lining design.
Equipment Features
- Heavy-duty presses (pressure bearing capacity of more than 50 tons).
- Automatic lamination/hot stamping module (to enhance the appearance quality).
Cultural And Creative Product Packaging Solution
Raw material requirements
- Art pulp (such as dyed pulp, mixed with metal fibers).
- Gift wrapping requires matte/glossy finish.
Mold design
- Special-shaped molds (such as hollow carving, 3D modeling).
- Support small batch customized production (quick mold change system).
Equipment Features
- Multi-color printing module (embedded pattern during direct molding).
- Handmade texture simulation equipment (such as imitation cloth/wood grain embossing).
Container Product Packaging Production Solution
Raw material requirements
- High-density pulp (such as milk powder cans need to be moisture-proof and anti-oxidation).
- Alcoholic beverage/cleaning product packaging needs to be resistant to liquid penetration (inner layer coated with PET or aluminum foil).
Mold design
- The bottle cap needs to have a precisely formed threaded structure, and the milk powder spoon needs to be ultra-thin and fold-resistant.
- Yogurt cups require cup edge crimping and sealing technology.
Equipment Features
- Multi-layer composite coating equipment (anti-leakage treatment).
- High-precision injection molding modules (in combination with plastic parts, such as bottle cap liners).
What are the Key Differences of Pulp Molding Technology ?
- Drying process: Food requires high temperature and fast drying, while seedlings require low temperature and slow drying (to avoid destroying additives).
- Mould complexity: Industrial and cultural moulds have the highest precision (±0.1mm), while agricultural product moulds are relatively simple.
- Environmental protection: Food and seedling cultivation require fully degradable equipment, while industrial products can be compatible with some non-degradable materials (such as composite films).