The secret behind the yogurt box: revealing the secret of PP/PS/PET thermoformed blister plastic sheet

Yogurt, as a nutritious dairy product, is deeply loved by people. We see a variety of yogurts on supermarket shelves. They not only have different tastes, but also have unique packaging. do you know? As the “coat” of yogurt, the yogurt box not only plays a role in protecting the yogurt, but also meets the requirements of food safety and environmental protection. The seemingly simple yogurt box actually has a lot to offer in terms of raw materials, production technology, and material selection.

Raw materials for yogurt boxes: PP/PS/PET thermoformed blister plastic sheet

The main raw material of yogurt boxes is plastic, and common types include:

PP (polypropylene): It has good heat resistance, chemical resistance and oil resistance, is non-toxic and odorless, and is one of the most commonly used materials for making yogurt boxes. It is often used to make the bottom and sides of yogurt boxes.

PS (polystyrene): It has good transparency, gloss and easy processability. It is often used to make the lids of yogurt boxes to show the shape and color of yogurt.

PET (polyethylene terephthalate): It has good barrier properties and chemical resistance. It is often used to make the inner layer of yogurt boxes. It can prevent yogurt from coming into contact with oxygen or other substances and extend the shelf life.

Different raw materials have different characteristics, so the selection needs to be comprehensively considered based on the specific needs of the yogurt product.

Yogurt box manufacturing process

The production process of yogurt boxes mainly includes the following steps:

Melt extrusion: Plastic particles are heated and melted and extruded into sheets through an extruder.

Thermoforming blister: The sheet is heated to soften and pressed into shape with a mold.
After the PP/PS/PET sheet is heated and softened, the various components of the yogurt box are made using a vacuum blister molding process. Specific steps are as follows:

• Heating: Place the PP/PS/PET sheet in a heating device to soften it and change it to a plastic state.
• Blister: Use vacuum suction to adsorb the softened sheet to the surface of the mold so that it fits the shape of the mold.
• Forming: After cooling and shaping, yogurt box parts of different shapes can be obtained.

Trimming: Trim the formed yogurt box to remove excess material.

Printing: Print patterns and text on yogurt boxes.

Inspection: Quality inspection of yogurt boxes to ensure compliance with standards.

Why choose PP/PS/PET blister sheets to make yogurt boxes

PP/PS/PET material has the following advantages, making it an ideal material for making yogurt boxes:

● Good heat resistance: Yogurt boxes need to be filled, sealed, sterilized, etc. at high temperatures, so they need to have good heat resistance.

● Good acid and alkali resistance: Yogurt has a certain acidity, so the yogurt box needs to have good acid and alkali resistance to prevent the yogurt from corroding the packaging.

● Good barrier properties: Yogurt is easy to spoil, so yogurt boxes need to have good barrier properties to prevent oxygen and moisture from entering and extend the shelf life of yogurt.

● Good mechanical strength: Yogurt boxes need to have a certain mechanical strength and be able to withstand the pressure during transportation and stacking.

● Good processability and formability: PP/PS/PET materials are easy to process and form, and can meet the needs of yogurt boxes of different shapes and sizes.

● Comply with food safety standards: PP/PS/PET materials comply with food safety standards and will not cause harm to human health.

Advantages of PP/PS/PET thermoformed blister plastic sheet

Compared with yogurt boxes made of other materials, yogurt boxes made of thermoformed PP/PS/PET plastic sheets have the following advantages:

Light weight: The density of PP/PS/PET material is smaller, so the yogurt box is lighter and easier to transport and use.

Low cost: The cost of PP material is relatively low and suitable for the packaging of ordinary yogurt.

Good transparency: PS/PET material has good transparency, and the shape and color of the yogurt can be clearly seen.

Recyclable: PP/PS/PET materials can be recycled to reduce environmental impact.

Beautiful appearance: The surface of the PP/PS/PET sheet is smooth and flat, and can be printed with various patterns and text to make the yogurt box more beautiful.

Wide range of uses: In addition to being used to make yogurt boxes, PP/PS/PET sheets can also be used to make various food packaging boxes, tableware, electronic product parts, etc.

Choose PULIXIN

PP/PS/PET thermoformed blister plastic sheet is a material with excellent performance, safety, reliability, environmental protection and energy saving, and has broad application prospects in the field of food packaging. If you are looking for high-quality yogurt box materials, then PP/PS/PET thermoformed blister plastic sheets will be your best choice.

As an excellent PP/PS/PET plastic sheet manufacturer in China, PULIXIN has 12 PP/PS/PET co-extrusion production lines and 4 PET coating production lines to meet production needs. Our customers are all over the world, and more than 30 countries have chosen us. Our products are widely used in food trays/packaging, electronic product parts trays/packaging, and other product packaging fields. We have advanced inspection equipment and strict quality inspection department to provide complete after-sales service. You can firmly choose us pulixin, we will be your trustworthy partner! Contact us now!

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