Four-way easily-torn packaging bag and preparation method thereof

The invention discloses a four-way easily-torn packaging bag which comprises a packaging bag front face and a packaging bag back face, and a printing film, aluminum foil, a polyester film and a polyethylene film are sequentially arranged on the packaging bag front face/the packaging bag back face fr...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG TINGZHI, HU QI, LIU HENGPING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNERANALOGOUS TO PAPER MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN AMANNER ANALOGOUS TO PAPER PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUSTO PAPER
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Beschreibung
Zusammenfassung:	The invention discloses a four-way easily-torn packaging bag which comprises a packaging bag front face and a packaging bag back face, and a printing film, aluminum foil, a polyester film and a polyethylene film are sequentially arranged on the packaging bag front face/the packaging bag back face from outside to inside. The printing film is a biaxially oriented polypropylene film or the polyester film is a biaxially oriented polyester film; the polyethylene film sequentially comprises a composite layer, a middle layer and a heat sealing layer from outside to inside, and the polyethylene film is obtained through co-extrusion film blowing. Wherein the raw materials of the composite layer and the middle layer are both composed of LDPE and LLDPE, and the weight ratio of LDPE to LLDPE in the composite layer and the middle layer is (1-3): 1; the raw materials of the heat-sealing layer are composed of LDPE and mPE, and the weight ratio of LDPE to mPE of the heat-sealing layer is 0.5-2: 1. The packaging bag is easy t