Green tea fresh-keeping nano packaging wrapper and use thereof
A packaging material and nano-technology, applied in the field of high-quality green tea nano-packaging fresh-keeping materials, can solve the problems of poor fresh-keeping effect, poor packaging barrier performance, and no reasonable preservation technology, and achieve the effect of improving fresh-keeping quality and high fresh-keeping effect
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[0028] 1.2 Preparation process of nano-masterbatch
[0029] According to the mass ratio, the nano powders (D, HTB, TiO 2 1. TiO 2 2) 30%, polyethylene plastic 56%, coupling agent KH-570 (γ-methacryloxypropyltrimethoxysilane, CAS No. 2530-85-0) 10%, antioxidant 2%, paraffin 2%, mixed by a high-speed mixer (3500 rpm), kneaded by a twin-screw plasticizer (SHJ-50 / 500-45-36), extruded and cooled for 2 minutes, and cut to obtain nano masterbatches D, HTB, TiO 2 R and TiO 2 a.
[0030] 2 Preparation of nano-plastic fresh-keeping bags:
[0031] 2.1 Instrument
[0032] Two-layer co-extrusion 1m film blowing machine Zhejiang Jiaqi Packaging Machinery Co., Ltd.
[0033] Corona treatment machine SDCD9 Zhejiang Mingli Electric Appliance Factory
[0034] Polyethylene aluminized film machine Zhejiang Jiaqi Packaging Machinery Co., Ltd.
[0035] Microcomputer Control High Speed Bag Making Machine FDB300W Zhejiang Jiaqi Packaging Machinery Co., Ltd.
[0036] 2.2 Blown film process ...
Embodiment 1
[0049] Example 1: Application of nano-packaging materials in Biluochun
[0050] (1) Tea preparation The fresh leaves are spread, greened, cooled, dried, air-selected, picked and picked to obtain finished products.
[0051] (2) Packaging operation Every 50 grams of Biluochun is packaged with the nano-packaging material made by the present invention and stored at normal temperature. The fresh-keeping quality of Biluochun can be significantly improved by using the nano-packaging material of the invention. Its physical and chemical qualities such as moisture, free amino acids, tea polyphenols, chlorophyll, vitamin C, and sensory qualities are significantly better than those of ordinary packaging materials, such as figure 1 shown. During the fresh-keeping period, the water content of Biluochun increased, and the water content of Biluochun in nano-package was significantly lower than that in ordinary packaging. After 300 days of storage, the water content of Biluochun in nano-packag...
Embodiment 2
[0052] Example 2: Nano packaging material applied to Qingfeng
[0053] (1) Tea preparation The fresh leaves are spread, greened, cooled, dried, winnowed, sorted, and finished products are obtained.
[0054] (2) Packaging operation Every 50 grams of Qingfeng adopts the nano-packaging material of the present invention to pack and preserve at normal temperature. Using the nano packaging material of the invention can significantly improve the fresh-keeping quality of Qingfeng. Its physical and chemical qualities such as moisture, free amino acids, tea polyphenols, chlorophyll, vitamin C, and sensory qualities are significantly better than those of ordinary packaging materials, such as figure 2 shown. During the fresh-keeping period, the moisture content of green peaks increased, and the moisture content of green peaks with nano-packaging was significantly lower than that of ordinary packaging. After storage for 300 days, the moisture content of green peaks with nano-packaging w...
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