What is the recycling process for long-lasting three proof thermal paper?

Long term three proof thermal paper is a type of paper that has undergone special treatment and has the characteristics of waterproofing, oil resistance, and scratch resistance. It is widely used in logistics, medical, retail, and other fields. Regarding its recycling process, due to the special coating and chemical substances of thermal paper, the recycling process is more complex compared to ordinary paper. The following is a general process for recycling long-lasting three proof thermal paper:

1、 Collection and classification

Collect:

Collect discarded long-lasting three proof thermal paper from various usage scenarios such as supermarkets, pharmacies, logistics centers, etc.

Ensure that the paper is kept as dry and clean as possible during the collection process to avoid contamination.

Category:

Separate long-lasting three proof thermal paper from other types of waste paper (such as office white paper, mixed waste paper, etc.).

Thermal paper should be recycled separately to avoid mixing with ordinary waste paper, so as not to affect the quality and efficiency of recycling.

2、 Preprocessing

Manual sorting:

Remove foreign objects from the paper, such as tape, plastic film, metal nails, etc.

Separate paper of different colors or materials for subsequent processing.

Packaging compression:

Use a hydraulic baler to press paper into square packs for easy transportation and storage.

The packing density should meet certain requirements to ensure stability during transportation.

3、 Fragmentation and de Ink

Crushed pulp:

Send the packaged paper into a hydraulic pulper for shredding, forming pulp.

Control the concentration and temperature of the pulp to ensure effective disintegration.

De ink:

Add chemical agents (such as NaOH, H ₂ O ₂, surfactants, etc.) for de ink treatment.

By adjusting the dosage of reagents and reaction conditions, the efficiency of ink removal can be improved.

Use multi-stage countercurrent washing to remove residual ink and chemicals.

4、 Bleach and refining

bleach:

Use bleaching agents such as hydrogen peroxide or ozone to bleach pulp and improve the whiteness of the paper.

Control the dosage and reaction conditions of bleach to avoid excessive damage to the pulp.

refined:

By refining the fibers, the bonding strength is improved, making the paper stronger.

Add additives such as dry strength agents and sizing agents to improve the physical properties of paper.

5、 Paper making and post-processing

Paper copying:

Feed the refined pulp into a paper machine to make paper.

Control various parameters during the papermaking process, such as pulp concentration in the flow box, spray speed, vacuum degree, etc., to ensure the quality of the paper.

Post processing:

Press, dehydrate, dry and shape the copied paper.

Perform post-processing steps such as calendering, slitting, and rewinding as needed to meet different usage requirements.

6、 Environmental protection and resource management

Wastewater treatment:

Treat the wastewater generated during the recycling process to ensure compliance with discharge standards.

Using biochemical treatment, advanced treatment and other processes to remove pollutants from wastewater.

Resource conservation and reuse:

By recycling and reusing long-lasting three proof thermal paper, we can save raw materials and energy.

Reduce pollution and damage to the environment, and achieve sustainable development.

precautions

The recycling of long-lasting three proof thermal paper is difficult and requires professional recycling equipment and processing technology.

During the recycling process, environmental regulations and standards should be strictly followed to ensure the safety and environmental protection of the recycling process.

Encourage enterprises and individuals to actively participate in the recycling of long-term three proof thermal paper, and jointly promote the development of circular economy.

In summary, the recycling process of long-lasting three proof thermal paper includes steps such as collection and classification, pretreatment, crushing and de ink, bleaching and refining, papermaking and post-processing, as well as environmental protection and resource management. Through professional recycling equipment and processing technology, efficient recycling and reuse of long-lasting three proof thermal paper can be achieved.