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2020

A Brief Discussion on How to Identify the Material of Plastic Packaging Bags

Have you ever wondered how to identify the materials used in plastic packaging bags? Custom‑made plastic bags can be crafted from a wide variety of materials. As a buyer, how can you ensure that the material of your custom‑ordered bags matches what you specified? You can tell them apart by their distinct characteristics.

　　Qingdao Platinum Packaging Technology Co., Ltd. is a manufacturing enterprise specializing in plastic flexible packaging, encompassing the research and development of new plastic materials, printing, lamination, slitting, bag-making, and related R&D. The company’s production base is located in the Jiaobei Industrial Park, Jiaozhou City, Qingdao, while its business operations and R&D center are situated in the Shinan District of Qingdao. With many years of experience, the company produces high‑quality plastic flexible packaging materials and comprehensive packaging solutions. Its main product lines include: laminated plastic packaging bags, color‑printed packaging bags, food‑grade packaging bags, vacuum‑sealed bags, retort pouches, low‑temperature frozen‑food bags, cat litter bags, and rolls of automatic packaging films for food and medical applications; as well as transfer printing films, warning tapes, flagging tapes, bird‑repellent tapes, and cable ties for air conditioners, among others.

　　I wonder if anyone has ever looked into this before. Plastic packaging bag How can you identify the material? Custom‑made plastic packaging bags can be produced from many different types of materials. As a purchaser, how can you verify that the material of your custom‑ordered bags matches what you specified? You can distinguish them by their respective characteristics.

　　Both are made of PE material: high-pressure bags are softer, sturdy, and durable, while low-pressure bags are more resistant to stretching, offering greater stability and higher rigidity. You can tell them apart this way: tear the bag—if there’s a white mark at the tear, it’s a low-pressure bag; if there’s no white mark, it’s a high-pressure bag. Tearing a high-pressure bag feels noticeably more difficult.

　　Among various types of bags, this material is quite transparent. PP bags are rigid and smooth; even a slight shake produces a loud sound, and folding them in half leaves visible creases. OPP bags, on the other hand, are relatively brittle and easy to tear.

　　That concludes today’s presentation. For more information, please visit our official website.