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Industry info Wiki Q&A
Q what products use injection stretch blow molding
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ChadDierser Release Time: May 31, 2024, 11:19 AM
Extrusion blow molding and injection blow molding are two widely used techniques in plastic manufacturing, each with unique processes and applications. In extrusion blow molding, plastic is melted and extruded into a hollow tube, known as a parison. This parison is then clamped into a mold, and air is blown into it, expanding the plastic to match the mold’s shape. This method is efficient for producing large quantities of containers, like bottles, due to its continuous operation capability. On the other hand, injection blow molding involves injecting molten plastic into a preform mold to create a preform shape, which is then transferred to a blow mold. Air is then introduced to inflate the preform against the blow mold’s walls, forming the final product. Injection blow molding is favored for producing high-precision, high-quality parts with tight tolerances and minimal waste. It is commonly used for small to medium-sized bottles in the pharmaceutical and cosmetics industrie...
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Q polypropylene uv transmission
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MonicaShaw Release Time: May 25, 2024, 11:58 PM
Polypropylene (PP) is a type of plastic widely used in various applications, from packaging to automotive parts, because of its strong, lightweight, and versatile properties. When it comes to ultraviolet (UV) transmission, polypropylene allows very low UV light to pass through, effectively blocking most of it. This characteristic makes PP a good choice for containers and applications where UV protection is necessary to prevent degradation or spoilage of the contents. However, although PP blocks UV radiation naturally, it’s not inherently UV resistant. Prolonged exposure to sunlight can cause PP items to degrade, losing their strength and color. To enhance UV resistance, additives can be incorporated into the polypropylene during its manufacturing. These additives absorb or block UV radiation, extending the material’s life when exposed to sunlight.
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Q which is better polypropylene or polycarbonate
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MaureenCrofts Release Time: May 4, 2024, 3:05 PM
Determining whether polypropylene or polycarbonate is better hinges on the application. Polypropylene (PP) is known for its resistance to chemicals, fatigue, and high temperatures. It’s lightweight, durable, and often used in packaging, textiles, and automotive components. On the other hand, polycarbonate (PC) boasts exceptional impact resistance, clarity, and heat resistance. It’s frequently chosen for bullet-proof glass, eyewear lenses, and electronic components. For projects requiring strength and transparency, such as protective coverings or lenses, PC is ideal. However, for applications needing chemical resistance and toughness, like containers or car parts, PP may be more suitable. Cost considerations also play a role, with PP generally being less expensive than PC.
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Q how to pull yarn from the center
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BaldwinGreen Release Time: May 1, 2024, 9:00 PM
To separate yarn strands, first, identify the type of yarn and number of plies. If it’s twisted tightly, gently roll it between your palms in the opposite direction of the twist to loosen. Begin at one end, carefully pulling the plies apart inch by inch to avoid tangling. Using a needle or your fingers, tease apart the strands if they resist separation. Work slowly and patiently, especially with fine or slippery yarns. For very sticky or fuzzy yarns, chilling in the freezer can make fibers less clingy. Always ensure your hands and work surface are clean to prevent the yarn from picking up dirt or oils during the process.
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