Qingdao Yilida Packaging Co., Ltd. can supply high-performance Wax-Impregnated Waterproof Cardboard Box like Wax Corrugated Cartons and Wax Coated Fruit Cartons. The wax used for the cartons is classified according to the performance of the products required by the customers. It can use food-grade paraffin wax, microcrystalline wax and plant degradable wax. The wax coating per kilogram can be flexibly processed according to the customer's requirements. The waterproof wax-coated cartons mostly adopt the improved production methods of full immersion, semi-immersion and local point immersion wax coating.

Our company's full range of wax-coated cartons can be classified according to five dimensions: wax coating coverage range, production process, wax material, corrugated board structure and application industry.

What do full immersion/semi-immersion/localized fixed-point waxing represent? What are the differences in the waxing coverage of different types of cartons?

Full immersion, semi-immersion or localized point waxing are the waterproof waxing processes for corrugated cartons. According to the extent of wax penetration and coverage on the surface of the carton board, they directly determine the waterproof and oil-resistant grades of the cartons. The differences lie in the wax coverage range, waterproof grade, cost, and they are mostly used for seafood, frozen products, cold chain, and humid export packaging.

Detailed Introduction of Three Types of Wax-Coated Paper Boxes

Ⅰ.Fully Wax-Coated Paper Box

The fully immersed waxed carton completely immerses all six inner and outer surfaces of the corrugated cardboard box into a high-temperature wax pool. The surface layer, the corrugated core, and the inner layer are all fully saturated with paraffin wax, forming a fully enclosed and waterproof structure for the entire box. The wax penetration depth is the deepest and the protection is the most thorough.

Core advantages

This waxed carton has the highest waterproof rating and can be exposed to ice water, condensation water, and rainwater splashes for a long time. It can effectively protect the products even on rainy days. Moreover, in high-humidity maritime transportation and long-term stacking in cold storage, the carton is less likely to become soft, delaminate, or collapse, and has the strongest compressive stability.

II. Semi-immersed Wax Paper Box

A semi-immersed wax paper box refers to a type of paper box that only undergoes waxing on the specified surface of the customer. It only performs waterproof waxing on the key moisture-prone surfaces, or only sprays wax or uses curtain-style coating on the inner or outer walls of the paper box. While maintaining a certain moisture-proofing ability, it also takes into account the printing aesthetics of the paper box. It is commonly used for short-term refrigerated transportation of vegetables and fruits.

Core Advantages

The moisture-proof and waterproof level of a semi-immersed wax paper box is slightly lower than that of a fully immersed wax paper box. It can prevent water accumulation on the ground, water seepage from the goods inside, and bottom moisture re-entrainment. The wax loss is approximately half of that of a fully immersed one, and the cost is also lower. If the products are not placed in rainy days, this choice offers higher cost-effectiveness and can effectively control costs.

Immerse the designated surface with wax, while keeping the other surfaces as they are. This results in better air permeability and a more complete and clear outer packaging printing.

III. Partially Dipped Wax-Coated Cartons

Partially dipped wax-coated cartons do not immerse the entire surface of the cardboard. Instead, wax is only applied to the weak points that are prone to absorbing water, such as the corners of the carton, crease joints, the plug opening of the swing lid, cracks caused by collision on the carton body, the ends of the paper tube, and other high-risk areas prone to water seepage, as well as the designated positions by the customer. The remaining un-designated areas remain as the original paper.

Core Advantages

This solution uses the least amount of wax and has the lowest cost among the three processes. It can maximize the retention of the carton's printing, breathability, and original feel. It specifically repairs the weak points prone to water seepage, addressing the common problem of carton corners getting damp and deteriorating.

Comparison of Three Processes

Table of Paper Box Specifications and Paperboard Thickness

Applications of wax-coated cartons

Wax-coated waterproof cartons are mainly used for fresh food and cold chain transportation. They can also be selected for long-distance sea transportation. During the transportation process, if the temperature is low, ordinary cartons will become brittle at -15℃ and will not be able to effectively carry the goods and provide protection. However, our wax-coated cartons can still remain in normal condition even at -40℃. Thus, it can be seen that it has significant advantages.

In addition, all the materials used by Yilida are food-grade and can directly come into contact with various products such as fruits, vegetables, meat and seafood, which comply with relevant international safety standards.

1. Fresh Produce Waxing Box

The food-grade waxing carton is a green and environmentally friendly packaging material that can directly come into contact with drinking water and fresh food ingredients. It is widely used in municipal fresh food distribution, cold storage storage, and ice-cold meat packaging.

2. Special Waxing Box for Seafood Transportation

The entire waxing process combined with salt-resistant modified wax makes the box lightweight, wear-resistant, and with a smooth inner wall. It perfectly replaces ordinary paper boxes; the ends of the box can be equipped with matching protective corners, making it less prone to damage during ocean transportation and handling.

3. Fruit and Vegetable Agricultural Turnover Waxing Box

The semi-waxing model is the mainstream choice for agricultural fresh produce. The single-sided waxing prevents condensation water from forming on the produce, and the non-waxed surface retains the air permeability space, avoiding the spoilage of fruits and vegetables due to being compressed. At the same time, the cardboard itself has anti-UV and weather-resistant properties, and it is not prone to aging when stored outdoors for a short period of time. It is the top choice for cost-effectiveness in fruit and vegetable wholesale.

Customized Services

As a direct supplier, we have a complete production line and are capable of meeting your order requirements. Please contact us and inform us of the customized dimensions and printing patterns you need. There is no need for excessive elaboration on the dimensions; simply customize according to your actual packaging needs or contact us for suggestions. The pattern printing adopts UV digital printing technology, presenting clear printing effects and an outstanding visual experience.

Compared to traditional cardboard boxes, the core advantages of wax-coated cardboard boxes

Wax-coated cardboard boxes can replace galvanized iron boxes, ordinary laminated cardboard boxes and conventional corrugated cardboard boxes for packaging water-containing products. They have outstanding comprehensive competitive advantages. The product uses food-grade paraffin raw materials, which are safe, non-toxic, and free of heavy metals. They can directly be used for packaging fresh food, drinking water, etc. The surface wax film has an inert structure and is resistant to acid and alkali, as well as corrosion from seawater and salt water. It is suitable for long-term use in salted aquatic product processing and coastal humid storage environments.

The inner walls of the boxes are smooth and have low friction, which can reduce the impact and wear of goods. They are lighter in weight and have excellent performance in stacking and pressure-bearing. The black wax-coated cardboard type adds 2%–2.5% carbon black components, which have anti-aging and anti-ultraviolet properties. They can be stored outdoors for a long time under sunlight exposure and meet the moisture protection requirements for outdoor storage and open-air turnover in one step.

Complete packaging solution

Our factory offers a complete product line of waxed cardboard boxes like Wax Coated Vegetable Cartons, cardboard box protective corners, and sealing accessories. We can provide all the packaging materials in one package according to customer needs. We can also provide different packaging solutions based on customer requirements to fully protect the customer's products.

Solution A:

High-end protection for seafood/frozen products

The waxed cardboard box contains PE waterproof inner film bags and absorbent pads. The absorbent pads are used to absorb melted ice water. Seafood products/frozen products are packed separately in plastic bags and ice packs are placed inside to prevent the products from melting too quickly.

When sealing the box, use waterproof tape to fully seal the box seams and block the water leakage channels. After sealing the box, reinforce the outer packaging, use protective corners to support the box body, and tie with packing straps to prevent the box from swelling and opening due to stacking.

Solution B:

Economical combination for fresh fruits and vegetables

The box is lined with breathable and perforated fresh-keeping bags to prevent condensation. The box body is reserved with suitable ventilation holes to avoid moisture accumulation and rot. It is suitable for short-distance cold chain and regular storage for fresh fruits and vegetables, and only requires ordinary tape to seal the box, with outstanding cost-effectiveness.

Option C:

Simple Moisture Protection for General Dry Goods

Only an internal moisture-proof PE film liner, simple box sealing, meets basic warehouse moisture protection requirements

Description of Raw Material for Wax-Coated Paper Boxes

All wax-coated paper boxes produced by our factory are made from brand-new food-grade raw pulp and compliant paraffin materials. The paraffin materials are sourced from globally renowned manufacturers. Each batch of raw materials can provide an original factory material quality inspection report to ensure compliance.

Each batch of incoming raw materials is sampled for laboratory testing. Only those that pass the test and issue a quality inspection report can be put into production; any unqualified raw materials will be directly returned to the supplier, and strict control is exercised over the quality of the finished products.

Product certification available

Our company has complete export qualifications and has obtained ISO three-system certifications, FSC forest production and marketing chain certification. The products are tested by PONY (authoritative) and have been recognized as a specialized, innovative, distinctive and high-tech enterprise. The production control is standardized, environmental protection complies with regulations, and the technical strength is outstanding. It is suitable for global export packaging requirements. Food contact safety test reports can meet the customs clearance requirements of foreign trade.

Core technical parameters of wax-coated cartons  

Quotation cooperation method

Quotation requests can be sent via email or WhatsApp. Please feel free to request product catalogues and quotations.

At Yilida's six angle boards production lines, you can find various types of paper corner protectors, including L-shaped, U-shaped, and round ones. 20 years of production experience has given us advanced technology and production capabilities, ensuring our products meet standard moisture content requirements and are ISO9001 certified, certified by PONY Testing, and FSC certified (100% recycled and MIX100%).

What are Paper Corner Protectors?

Paper corner protectors, also known as angle boards, edge boards, corner strips, or corner wraps, are made from multiple layers of high-strength kraft paper using a precision composite process. They are used to wrap the edges and corners of products, providing protection, reinforcement, and support. Compared to wooden or plastic corner protectors, they are lighter, recyclable, and more convenient to use.

What are Different Types of Paper Corner Protectors Suitable for Packaging?

Yilida can customize paper corner protector sizes to meet your packaging needs. As for shapes, the main types include L-shaped, U-shaped, round, solid, and flat, but V-shaped can also be customized.

L-shaped corner protectors can be placed on the edges of cardboard boxes or the corners of items needing reinforcement to prevent the boxes from being crushed or deformed, or the items from being damaged by impact.

U-shaped corner protectors can also protect corners; they can be directly clipped onto corners and are especially suitable for protecting doors, windows, glass panels, tiles, and furniture. They are very convenient to use and act as a cushioning barrier, making the items they protect safer during transportation.

Round, solid paper corner protectors, also known as wrap-around ones, are definitely a better choice if you're packaging and protecting cylindrical items compared to other types. They are ideal for packaging items with rounded shapes such as shipping drums, cans, and rolls, providing strong cushioning and preventing the contents from denting.

Finally, flat paper corner protectors are suitable for packaging furniture, electronic equipment, or glass curtain walls. They can also be used at the bottom of paper pallet legs to increase load-bearing capacity.

In addition to waxed waterproof cartons and paper corner protectors, Yilida also offers paper slip sheets. These packaging products from our factory can help you enhance the protection of your goods during transportation and storage while being lightweight, convenient, and recyclable.

Why Use Paper Slip Pallets?

The biggest advantage is that paper slip pallets improve the efficiency of handling and loading/unloading operations. Their small size and light weight save transport space and don't add much weight to goods. Moreover, despite their lightness, a single paper slip pallet can still bear a load of 1 ton or even 1.5 tons or more, with even higher static load-bearing capacity, making them a viable alternative to plastic and wooden pallets. Wooden pallets require fumigation, which is troublesome, and plastic is not as environmentally friendly as paper.

Furthermore, paper slip pallets are lighter than wooden pallets, reducing fuel consumption, which means lower transportation costs, and saving on the purchase, repair, and return costs of wooden pallets.

Use and Storage

Using paper slip pallets requires a forklift equipped with a push-pull mechanism. The size, thickness, and number of lips can be customized to meet different loading and unloading needs. Unused paper pallets should be stored in a dry, cool environment and kept flat to prevent them from bending or deforming. For long-term storage, it is recommended to avoid direct sunlight or extreme temperatures.