Waterproof and heat-preservation lunch bag processing material

[0026] Preparation of lunch bag processing materials: It consists of a waterproof inner layer, an insulating middle layer and a decorative outer layer. The waterproof inner layer is made of PVC film, and the decorative outer layer is made of PTFE film and Oxford cloth.

[0027] Processing of insulation middle layer:

[0028] (1) 30g of asbestos wool and 10g of sepiolite fiber powder are mixed and then placed in an oven at 110-120°C and dried to constant weight to obtain material I;

[0029] (2) Heat 5g of microcrystalline wax to a molten state and keep stirring, add 5g of magnesium aluminum silicate and 1g of polytetrafluoroethylene superfine powder, and stir evenly to obtain material II;

[0030] (3) Heat 20g of gelling agent to 120-130°C and keep stirring, then add material II and 1g cationic polyacrylamide, stir evenly, then add material I, stir evenly again, and cool down at a rate of 5-10°C / min Speed ​​cooling to 0-10 ℃ and heat preservation for more than 30 minutes to ob

[0033] Preparation of lunch bag processing materials: It consists of a waterproof inner layer, an insulating middle layer and a decorative outer layer. The waterproof inner layer is made of PVC film, and the decorative outer layer is made of PTFE film and Oxford cloth.

[0034] Processing of insulation middle layer:

[0035] (1) After mixing 40g of asbestos wool and 15g of sepiolite fiber powder, place it in an oven at 110-120°C and dry to constant weight to obtain material I;

[0036] (2) Heat 5g of microcrystalline wax to a molten state and keep stirring, add 5g of magnesium aluminum silicate and 2g of polytetrafluoroethylene superfine powder, and stir evenly to obtain material II;

[0037] (3) Heat 20g of gelling agent to 120-130°C and keep stirring, then add material II and 2g of cationic polyacrylamide, stir evenly, then add material I, stir evenly again, and cool down at a rate of 5-10°C / min Speed ​​cooling to 0-10 ℃ and heat preservation for more than 30 minutes to obta

[0040] Preparation of lunch bag processing materials: It consists of a waterproof inner layer, an insulating middle layer and a decorative outer layer. The waterproof inner layer is made of PVC film, and the decorative outer layer is made of PTFE film and Oxford cloth.

[0041] Processing of insulation middle layer:

[0042] (1) After mixing 40g of asbestos wool and 15g of sepiolite fiber powder, place it in an oven at 110-120°C and dry to constant weight to obtain material I;

[0043] (2) Heat 5g of microcrystalline wax to a molten state and keep stirring, add 5g of magnesium aluminum silicate and 2g of polytetrafluoroethylene superfine powder, and stir evenly to obtain material II;

[0044] (3) Heat 20g of gelling agent to 120-130°C and keep stirring, then add material II and 2g of cationic polyacrylamide, stir evenly, then add material I, stir evenly again, and cool down at a rate of 5-10°C / min Speed ​​cooling to 0-10 ℃ and heat preservation for more than 30 minutes to obta