Thermal upgraded kraft paper is a functional kraft paper obtained through special process modification treatments (such as coating composite, fiber restructuring, heat-resistant additive addition, etc.), which combines the high strength and tear resistance characteristics of traditional kraft paper with excellent heat resistance, insulation, and thermal stability. Its core function covers multiple fields such as packaging, industry, and printing, as follows:
1.High temperature resistant packaging protection
This is the core function of Thermal upgraded kraft paper. It can be used to make packaging containers or cushioning pads for high-temperature food and industrial high-temperature materials, such as inner liner paper for takeaway food boxes, oil resistant paper bags for baked goods, and outer packaging for high-temperature sterilized food. It can withstand short-term high temperatures above 120 ℃, avoiding paper deformation, damage, or adhesion to food ingredients when exposed to heat; In the industrial field, it can be used as a temporary packaging for hardware parts and electronic components after high-temperature processing, or as an isolation liner for high-temperature lamination processes of lithium battery cells and photovoltaic modules, to prevent products from sticking to the packaging under high temperature conditions, while also playing a buffering and protective role.
2.Hot forming and heat sealing adaptation
Thermally Upgraded Kraft Paper has good thermoplastic and heat sealing compatibility, and can be used to produce irregular packaging (such as disposable lunch boxes, cup holders, and product inner trays) through hot pressing molding technology. After molding, the shape is stable and not easily shrunk or deformed due to temperature changes; At the same time, its surface has undergone heat-resistant modification treatment, which can adapt to heat sealing packaging equipment. During the heat sealing process, the sealing and cutting blades will not adhere due to high temperature, ensuring the continuous and efficient operation of the packaging production line. It is suitable for large-scale operations of automated packaging assembly lines.
3.Thermal insulation and flame retardant assistance
Some Thermally Upgraded Kraft Paper has added flame retardant additives, which have certain thermal insulation and flame retardant properties, and can be used as auxiliary insulation materials in the fields of construction and home appliances. For example, it is used as a thermal insulation layer between home appliance shells and inner liners, and as a moisture-proof isolation paper for building insulation layers. It can slow down heat transfer and avoid rapid combustion when exposed to open flames, thereby improving the safety performance of the product; In express packaging, it can be used as an inner lining layer for insulated boxes, combined with insulation materials, to extend the insulation time of items during cold chain transportation.
4.Temperature resistant carriers for industrial processes
In industrial production, Thermally Upgraded Kraft Paper can be used as a carrier material for high-temperature processes, such as masking paper for circuit board electroplating processes and high-temperature resistant isolation paper for metal surface treatment. It can maintain structural integrity under complex working conditions such as high temperature and acidity, without swelling or damage, ensuring the accuracy of the process; In addition, it can also be used as a heat transfer base paper in the textile printing and dyeing industry, withstanding the high temperature and high pressure of the heat transfer process to ensure clear pattern transfer, and the paper is easy to peel off after transfer without leaving any paper scraps.
5.Environmentally friendly and biodegradable alternative solutions
Compared to traditional plastic high-temperature resistant packaging materials, Thermally Upgraded Kraft Paper has the environmental advantages of being biodegradable and recyclable. While meeting the needs of heat-resistant use, it can reduce white pollution, which is in line with the current trend of green packaging development. It can widely replace disposable plastic lunch boxes, plastic insulation pads and other products, and is suitable for fields with high environmental requirements such as catering, retail, and industry, helping enterprises achieve green upgrading of packaging materials.
