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Adding nucleating agent (transparent agent) to PP sheet roll is an effective way to improve the transparency of PP sheet roll and its products.After the nucleating agent is added, a large number of fine crystals will be produced in the production of PP sheet roll, which will reduce or even avoid the production of large spherulites. The reduction or elimination of large spherulites will obviously improve the transparency of PP sheet. At the same time, due to the action of nucleating agent, the formation of a large number of fine crystals, so that the cleanliness of PP sheet.The rigidity of PP sheet was improved while the transparency of PP sheet roll was improved.
C. Improve the heat resistance and rigidity of PP sheet roll
The heat resistance and rigidity of PP sheet can be improved obviously by means of filling modification.The most widely used fillers are talc powder, calcium carbonate, etc.By adding 30% ~ 40% talc powder, the rigidity of PP sheet roll can be improved obviously, and the temperature can be raised to over 140℃. Meanwhile, the excellent sanitary performance and better oil resistance of pure PP sheet can be maintained, and the price is relatively low.Its molding products can be used for microwave heating.
According to the requirements of PP sheet roll to the forming conditions, the Angle of mold release: punch 2 o ~ 3 o(5 o optimally), die 1o ~ 3 o(5 o optimally);Molding temperature: sheet temperature 150 ~ 180℃, mold temperature 70℃ ~ 90℃;Molding shrinkage: punch 0.02 ~ 0.03mm/mm, die 0.03 ~ 0.04mm /mm.Because PP sheet material sheet material has the characteristics of abundant material source, low price, non-toxic, tasteless, good transparency, high mechanical strength, so PP sheet material sheet material for vacuum molding processing, made of various packaging products are widely used in food, medicine, mechanical parts, daily necessities and other packaging.At present, PP packaging products appear on the market, in addition to simple lunch box, water, spoon, bowl, pickles box, a variety of local special products packaging box, yogurt pot, tray, etc. Also widely into the market.PP sheet products can be heated in microwave oven and sterilized at 125℃, so it is widely used in ready-to-eat food packaging.In addition, PP sheet vacuum blister molding products have been gradually applied in agricultural production in recent years, such as seedling tray, breeding cup, etc.
In the vacuum blister molding process, the best molding performance of modified PP sheet roll with (20% ~ 30%) low density polyethylene (PE) is obtained.
The bonding problem is the same as PE, which can be bonded after pretreatment.Welding with heating plate and friction welding was very successful.
Post-processing: when stamping by punching die and trimming die, the cutting gap needs 5mm, the material temperature is too high, the cutting burr. There should be corresponding measures to keep the minimum deformation amount during sealing. The heat sealing with coating layer, the temperature is 150 ~ 180℃, and the sealing time is 1s.
Item | PP Sheet Polypropylene Sheet roll | ||
Color | Any color | Application | Electric packaging Food packaging Cosmetic&Gifts. |
Width | 300~900mm | Certification | SGS,ROHS |
Thickness | 0.3~2mm | Warranty | 2 years |
Category | Printing Compound Food grade High cleanliness conductive Permanent Antistatic polymer common antistatic.,etc. |
Finished goods color | Matte/Glossy Transparent Common colors. |
Resistance | 10^3~10^8Ω | MOQ | 1 mt |
Laminating | PE, CPP, OPS, etc. | Price | Based on detailed specification |
Packaging | Pallet | Port | Shanghai |