Antibacterial moldproof extrusion of chemical crosslinked polyethylene foam plastic
An antibacterial, antifungal, chemical cross-linking technology, applied in the field of polyethylene foam, can solve the problems of sticky surface, reduced smoothness, brittleness, etc., and achieve excellent antibacterial and antifungal properties, high tensile strength and elongation at break. rate effect
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Embodiment 1
[0028] Step 1 first low-density polyethylene (MI0.6) and azodicarbonamide in a ratio of 2: 1, low-density polyethylene (MI0.6) and dicumyl peroxide in a ratio of 19: 1, low Density polyethylene (MI0.6) and decabromodiphenyl ether and antimony trioxide were used to make foaming agent masterbatch, crosslinking agent masterbatch and Flame retardant masterbatch. The temperature of internal mixing and opening is controlled at 90°C-110°C.
[0029] In step 2, 26.56 parts by weight of low density polyethylene (MI0.6), 48 parts by weight of foaming agent masterbatch, 13 parts by weight of crosslinking agent masterbatch, 9.64 parts by weight of flame retardant masterbatch, general black masterbatch (general purpose) 0.8 parts by weight and 2 parts by weight of the antibacterial and anti-mildew masterbatch are uniformly mixed with a mixer.
[0030] Step 3 Extrude the mixture in an extruder at a temperature of 110° C. to 125° C., and calender the obtained extruded material into a sheet....
Embodiment 2
[0035] Step 1 is the same as Example 1
[0036] The proportion of various pellets contained in the mixture of step 2 is changed to: 24.6 parts by weight of low-density polyethylene, 58 parts by weight of foaming agent masterbatch, 15 parts by weight of crosslinking agent masterbatch, 0.4 part by weight of black color masterbatch, antibacterial Anti-mold masterbatch 2 parts by weight. No flame retardant masterbatch is added to the mixture.
[0037] The extrusion conditions in step 3 are the same as those in Example 1, and the specifications of the sheet material are changed to: thickness 1.2mm, width 440mm.
[0038] Step 4 Change the temperature of the first, second and third stages of the foaming furnace to 164°C, 187°C and 223°C respectively. The conveying speed of the sheet in the furnace was 4.5 m / min.
[0039] Step 5 is the same as Example 1, but the resulting product has a width of 1200mm, a thickness of 3.0-3.2mm, and a density of 37kg / m 3 .
[0040] Antibacterial a...
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