Why Choose Purepack’s 4mm Corrugated Plastic Sheet?
- Good Flatness: The cooling and shaping section has been specially designed.
- High impact resistance: It will not crack at low temperatures.
- Double sided corona treatment: The double-sided dyne value keep at 50 or above.
- Pre cutting: We support CNC irregular cutting with a tolerance control of ± 1mm.
- Enough stock in regular color/size: We have stock of 48 × 96 inch white and black boards all year round.
What Are The 4mm Corrugated Plastic Sheet?
4mm corrugated plastic sheets, also called 4mm corrugated sheets, are widely used in cold chain logistics turnover boxes and food transportation packaging. The density is 500-800 gsm and can provide sufficient structural strength to withstand the pressure of full-load stacking.
Purepack uses pure new material PP combined to produce 4mm correx sheets with high impact toughness in low-temperature environments. Each PP corrugated sheet has four-sided hot-melt edge sealing with a sealing layer thickness of 0.3-0.5mm, forming a sealing barrier at the cutting edge. Food-grade corrugated plastic boards have obtained certification from the FDA (USA) and SGS (EU).
Choose The Perfect 4mm Corrugated Plastic Sheet
4mm corrugated plastic sheet has many kinds of applications for you to choose. Here are some of the common types we have.
Pure new PP material, FDA+SGS certification. Suitable for storage and transportation of fruit and vegetable boxes.
-20 ℃ impact resistant modification, with four sides hot-melt sealed. Used for frozen seafood containers and cold storage for frozen meat.
Surface resistance of 10 ⁶ -10 ⁹ Ω, used for turnover in clean environments of electronic products.
Plastic corrugated shipping boxes are becoming a popular packaging choice for storage and shipping. And they are often made in many sizes and shapes.
Key Features of 4mm Corrugated Plastic Sheet
Standard UV resistance, no yellowing for 24 months outdoors.
Not like cardboard absorbing water, not like wooden boards rotting.
Can be reused 5-10 times, with a single cost lower than cardboard.
Custom size, pattern, color, thickness can be accepted.
Longer service life with good edge banding technique
Good edge banding technique. Our 4mm correx sheets, after edge sealing, have undergone more than 200 cold and hot cycle tests (-20 °C to +40 °C), and there are no cracks at the edge sealing; they have a service life of 2-3 years in the cold chain.
In normal usage conditions, our corrugated plastic boxes made from 4 mm corrugated plastic sheets can be reused 50-100 times or more. It can save you more costs and help you strive for more profits.
Cold chain specific formula, normal use will not crack
Purepack has added an elastic toughening modifier to the 4mm corrugated plastic sheets cold chain formula, which maintains the notch impact strength of the board at -20 ° C above 8kJ/m ² (ordinary PP is about 3-4kJ/m ²).
At this modification level, the corrugated plastic box made by 4mm corrugated plastic sheets will not crack during normal use in cold chain scenarios (stacking storage, manual handling, occasional minor collisions).
Why You Choose Purepack?
The biggest difference between 4mm corrugated plastic sheets and other thicknesses is that it tests not only the sheet itself, but also the combined delivery capability of “food-certified sheet+ sealing edge processing + box structure design”.
- Purepack has built an independent cold chain product system. The raw material is food-grade PP, which is stored separately from ordinary industrial grade raw materials. The hopper is cleaned before and after production to avoid cross-contamination.
- In terms of certification, we hold both FDA and SGS food contact certifications, covering North American and EU requirements.
- The edge sealing process is equipped with hot melt sealing equipment, ensuring a good edge sealing effect and avoiding mold growth caused by waterentering.
Cases of Our 4mm Corrugated Plastic Sheet
4mm corrugated plastic sheet are used widely. Here are some of our cases:
Our client is a home renovation company in the United States; each construction site requires large areas of floor protection materials. They previously used cardboard for floor protection, but the cardboard was not waterproof. Our 4mm corrugated plastic sheets help them solve the problem.
Our customer is a farm pack vegetables in cardboard boxes, but the boxes became damp and softened, causing the lower boxes to collapse when stacked, resulting in vegetable crushing and damage, with a loss rate of about 8%. Use a 4mm Correx turnover box instead; PP material is completely non-absorbent, and the cold storage environment does not affect the strength of the box. 4mm thickness has strong compressive strength and will not deform when stacked in 5 layers.
- Technical Data
- Customer Gallery
- Quality Certification
- Factory Gallery
| Product Name | 4mm Corrugated Plastic Sheet |
| Other Thickness | 2mm, 3mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or as customized |
| Standard Size | 48″×96″, 36″×72″, 36″×24″, 24″×18″, any size can be customized (Width< 2600 mm) |
| Special treatment | Anti-static, conductive, flame-retardant |
| Color | Black, white, blue, green, yellow, or as your customized |
| Packaging | Film ordinary packing or according to the your requirements |
| Certificate | ISO9001, ISO14001, SGS, TUV |
Testimonials
We used to use cardboard boxes for shipping auto parts. The cardboard would get wet in the warehouse, and the boxes would collapse. We replaced Purepack’s 4mm corrugated plastic boxes. They are waterproof, they stack without collapsing, and each box lasts about 50 trips. The corrugated plastic boxes have been used for 6 months.”
John MillerLogistics Manager, United States“We supply construction site hoardings to contractors in the Northeast US. We used to use plywood, but it was heavy, expensive, and would rot after a few months. We switched to Purepack’s 4mm corrugated plastic sheets. They are light enough to install, strong enough to stand up in the wind, and they don’t rot. A 4mm sheet lasts 2 years on a construction site. We now use 4mm sheets for all our hoarding needs.”
Dave ChenOperations Manager, Australia
There are three ways of determining the quality of edge banding:
① Observation method – If the edge banding is not continuous and has an uneven width, this means that the edge banding is not uniform.
② Press test – If there is any looseness or “clicking” sound made during the pressing process, this means that the edge is not tightly sealed.
③ Cross-section test – Get a part of the edge sealing and use a blade to get the cross-section of it. If the upper and lower edges are still separated after slicing, it means that the edge sealing is not properly done.
The life span of a 4mm cold chain turnover box made by 4mm correx sheets depends on the number of uses, type of cleaning, and storage temperatures. If normal use conditions where the turnover is once a day, and cleaning is done once a week, the life span of the box will be around 2-3 years at a temperature between -20°C and +40°C.
The three key factors that determine life:
① Cleaning temperature – we suggest you use warm water below 40 ° C for cleaning. Water temperature exceeding 60 ° C can accelerate the aging of PP materials;
② Disinfectant choice – Chlorine-containing disinfectants (such as sodium hypochlorite) can make the surface of PP brittle after long-term contact. You’d better use hydrogen peroxide or peracetic acid disinfectants;
③ The stacking method – When you store empty boxes, it’s better to store them upside down or folded; avoid long-term compression on one side, bacause it may cause deformation of the bottom layer.
