Adding a coloring agent in plastics, can make plastic with bright colors and shiny. Colorants often using a variety of pigments and dyes custom food bags, sometimes with produce fluorescent or phosphorescent pigment composite food bags for food, vacuum packaging of electronic products, chemicals, pharmaceuticals, tea, precision instruments and cutting-edge products or general defense packaging. Raw material: OPP, PE, POF, PPE, PP, etc. composite membrane process is divided: while envelope, bottom seal bag, sealed in bags, side seal. Require four different machines. Food bags in choosing food bag food bag factory, first look at the packaging for damage, with or without food production license QS logo, date of production and shelf life; secondly, whether the odor smell food bags, especially in direct contact with food packaging; in addition, to see if the hand wipe fade, stretch look to see if prone to breakage. PE film: Transparency slightly less cpp, but softer than cpp, PE film is better tensile properties, tensile strength is better. There are white and transparent PE two kinds of PE (HDPE / LDPE / LLDPE), feel softer. PA film (nylon): PA relatively tough material, transparency and wear puncture-resistant, easily oxidized, easy to shrink and wrinkle, this material is suitable for installation similar bone products. OPP film: Material hard, and can not stretch, sealing type is very good, but transparency is more general, more brittle material, feel the difference. CPP film: CPP material transparency but better food than PE bags, OPP material softer than the poor and temperature, can be used to make printed materials, but not easy printing. _ Red plastic food bag printing plant (certified) _ food bags provided by Xiong Red Plastic Factory. Xiong Red Plastic Factory (corp.1688.com/page/index.htm?memberId=poqwe321&fromSite=company_site&tab=companyWeb_detail) Hebei Baoding, a leader in plastic bags over the years, the company implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Red plastic factory in leadership with the staff warmly welcome all inquiries negotiations to create the red flag Plastic Factory a better future.