The packaging industry in China has gone through over 30 years of development, but the quality of products on the market varies greatly. Prices range from just a few dollars to several hundred dollars per ton. In procurement, many companies focus only on the price per ton, while ignoring the actual length and performance of each ton of strapping. This distorted mindset has influenced some manufacturers, leading to the emergence of low-quality products such as sandwich packing tapes, ton-bag tapes, and tapes made from recycled materials. These substandard tapes have very low tensile strength and poor adhesion, which can negatively impact product packaging. So, how can you tell if the tape you are purchasing is of good quality? ### How to Distinguish Between "New Belt" and "Full Plastic Belt" A "new belt" is made entirely from virgin plastic material, which offers the best performance but comes at a higher cost. A "full plastic belt," on the other hand, may contain some recycled plastic, making it less expensive but also lower in quality. To identify whether a tape is made from new materials, you can look at its appearance. New belts tend to be more transparent and have a uniform color. If you place a piece of paper under the tape, you should be able to clearly see the text beneath it. Recycled tapes usually lack this clarity. You can also check by touch. New belts have better elasticity, straightness, and thickness. When compared with tapes that contain recycled materials, they feel stronger and more resilient. Another effective method is to burn a small piece. A 100% new tape will not emit a strong odor when burned, and the residue will be crystalline. Tapes containing recycled materials, however, often produce an unpleasant smell and leave behind ash mixed with other substances like lime. ### How to Distinguish "Core Tape," "Calcium Carbonate Tape," and "All-Plastic Tape" In addition to these, there are three common types of recycled material tapes: core tapes, calcium carbonate tapes, and all-plastic tapes. Here’s how to differentiate them using fire: 1. **Combustion Test** - **Core Tape**: When burned, it produces thick smoke and a strong pungent odor. The residue is mostly white powder, with no plastic-like characteristics. It cannot be stretched. - **Calcium Carbonate Tape**: Burns with less smoke than core tape. The residue is also white powder, but it contains fewer impurities than core tape. Still, it cannot be stretched. - **All-Plastic Tape**: Burns with a bright flame, little smoke, and a light petroleum-like smell. The residue is clear and crystalline, and the material can be stretched into a thin line. 2. **Appearance Method** - **Core Tape**: When torn, you can see a thin layer of plastic wrapped around a core of lime powder. The tear is uneven, and the strap lacks resilience and flexibility. - **Calcium Carbonate Tape**: The tear is neater, with better linear performance. It has slightly better recovery and hardness than core tape. - **All-Plastic Tape**: The tear is clean and even, with no visible impurities. It has excellent resilience and hardness, indicating it is made of 100% plastic. 3. **Specific Gravity Test** - All-plastic tapes float in water due to their lower density, while calcium carbonate or core tapes sink because of their heavier composition. This test can help estimate the plastic content in the tape. ### Common Mistakes When Purchasing Packing Tapes As the industry matures, so do the tricks used by unscrupulous sellers. Here are some common misconceptions buyers face: - **Mistake 1: Focusing Only on the Price Per Roll** Some sellers sell heavy-duty strapping but include a large paper core, reducing the actual amount of usable material. Always check the net weight before purchasing. - **Mistake 2: Ignoring the Total Length of the Roll** Different manufacturers may produce straps of varying thicknesses, which affects the total length and cost per meter. Choose based on your specific needs. - **Mistake 3: Overemphasizing Packaging** Fancy packaging doesn’t mean better quality. Paper cores cost about 3 yuan each, while woven bags cost less than 1 yuan. Choosing simpler packaging can save money. - **Mistake 4: Believing That White Is Better** Many cheap tapes use brighteners and calcium carbonate to make them appear whiter. This can reduce tensile strength and increase costs. When selecting packing tape, consider factors like tensile strength, adhesion, and weight per meter. High-purity PP tapes with a weight of over 4.4 g/m are ideal for most applications. Lighter tapes may seem cheaper, but they often break easily and don’t perform well. Choosing the right tape ensures better packaging and long-term cost savings.

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