Month: August 2023

What to do with uneven morphology of pre stretched foam in blister processing

1. The blister processed sheet material is not evenly heated, and should be slowly heated or equipped with a heat shielding mesh;
2. The thickness of the sheet is uneven, and a sheet with uniform thickness should be replaced;
3. The distribution of blowing air pressure is uneven, and the airflow should be homogenized to ensure a uniform distribution of air pressure.

Solution to Melt Collapse, Arch or Fold in Plastic Forming Process

1. If the temperature of the heater is too high, it should be appropriately reduced;
2. If the heating speed is too fast, it should be appropriately or slowed down;
3. If the sheet material is too close to the heater, the distance between the two should be appropriately increased;
4. If the heating time of the sheet is too long, the heating time should be appropriately shortened;
5. The raw material for processing sheet materials has a high melt index, low melt strength, and excessive sagging after heating during sheet hot forming. Therefore, resin processing sheet materials with a lower melt index should be replaced;
6. If the orientation of the sheet is too small and the sheet sags excessively after being heated, a sheet with higher orientation should be replaced. It is best to control the heating temperature within the minimum forming temperature range of the sheet;
7. If the stretching ratio in the forming area is too large, a plunger should be used for pressure assistance, or the movement speed of the plunger or mold should be appropriately increased;
8. The design of the mold structure is unreasonable, and the mold structure design should be modified: firstly, replacing the male mold with the female mold; Secondly, try to increase the sharp corners and fillet radius of the product as much as possible; The third is to redesign the mining house and assist in pressure and blockage.

Breeding packaging products and blowing plastic, where is the difference between injection molding products

It seems like there might be some confusion in your question. It’s not entirely clear what you’re asking, but I’ll do my best to provide some information that might be relevant.

Injection molding and blow molding are two different manufacturing processes used to create plastic products, each with its own characteristics and applications.

  1. Injection Molding: Injection molding is a manufacturing process where molten plastic is injected into a mold cavity under high pressure. Once the plastic cools and solidifies, the mold is opened, and the finished product is ejected. This process is commonly used to produce a wide range of plastic products, including packaging containers, automotive parts, toys, medical devices, and more. Injection molding offers high precision, intricate details, and can be used to create complex shapes with consistent quality.
  2. Blow Molding: Blow molding is a manufacturing process used to create hollow objects, primarily containers and bottles. In this process, a tube-like parison (hollow plastic preform) is extruded and then clamped into a mold. Compressed air is blown into the parison, causing it to expand and take the shape of the mold. Once the plastic cools and solidifies, the mold is opened, and the finished product is removed. Blow molding is often used for producing bottles, containers, and similar items.

As for “breeding packaging products,” the term “breeding” isn’t typically associated with manufacturing processes. If you meant “producing” or “manufacturing” packaging products, then both injection molding and blow molding can be used, depending on the specific requirements of the product.

In summary, injection molding and blow molding are distinct processes used in the plastic manufacturing industry. Injection molding is used for producing a wide range of plastic products with high precision, while blow molding is primarily used for creating hollow objects like bottles and containers. The choice between these processes depends on factors such as the desired product design, function, and production volume.

How to Choose Materials for Blister Packaging

Choosing the right materials for blister packaging involves considering factors such as the product’s characteristics, protection requirements, visual appeal, and cost. Blister packaging is commonly used for retail products to showcase the item while providing protection against tampering and damage. Here’s a step-by-step guide on how to choose materials for blister packaging:

  1. Understand Product Characteristics: Analyze your product’s size, shape, weight, and any special requirements it might have. Consider whether the product is fragile, sensitive to moisture or light, or requires extra protection.
  2. Select Blister Type: Choose between a clamshell or a face-seal blister design. Clamshells encase the entire product, offering a higher level of protection but might be costlier. Face-seal blisters cover just the front of the product, providing a more visible presentation.
  3. Choose Blister Material: Blister packaging typically involves a combination of a blister (plastic) and a backing card. For the blister portion, common materials include:
    • PVC (Polyvinyl Chloride): Provides good clarity and is relatively economical. It’s suitable for non-sensitive products.
    • PET (Polyethylene Terephthalate): Offers excellent clarity, toughness, and is recyclable. It’s a good choice for products with sharper edges.
    • RPET (Recycled PET): Environmentally friendly option made from recycled PET, offering similar properties to PET.
    • APET (Amorphous PET): Offers enhanced flexibility, making it suitable for irregularly shaped products.
  4. Choose Backing Card Material: The backing card can be made from paperboard, cardstock, or other materials. Consider the weight and thickness of the cardstock to ensure it provides adequate support for the product and blister.
  5. Consider Product Protection: If your product requires protection from moisture, light, or other external factors, you might need additional layers or coatings. Consider using barrier coatings or laminates to enhance protection.
  6. Printing and Branding: Decide whether you want to print branding, instructions, or other information directly on the blister or the backing card. High-quality printing can enhance the visual appeal of the packaging.
  7. Visibility and Presentation: Blister packaging is known for its visibility, allowing customers to see the product. Ensure the chosen materials offer the desired level of clarity to showcase the product effectively.
  8. Tamper Resistance: If tamper resistance is important, consider using materials that provide a secure seal. This can include heat-sealing the blister to the backing card.
  9. Sustainability Considerations: If environmental sustainability is a concern, opt for recyclable or biodegradable materials. Many consumers prefer eco-friendly packaging.
  10. Cost Considerations: Evaluate the cost of the chosen materials against your budget. While some materials might offer better protection or aesthetics, they could also be more expensive.
  11. Regulatory Compliance: Ensure that the chosen materials comply with relevant regulations and standards, especially if your product is food, pharmaceuticals, or other regulated items.
  12. Prototyping and Testing: Create prototypes using the chosen materials to test how well they work with your product. Test the packaging for durability, protection, and overall functionality.

By carefully considering these factors, you can choose the most suitable materials for your blister packaging that effectively showcase your product, offer protection, and align with your branding and budget.

Safety of plastic food packaging

As of my last update in September 2021, plastic food packaging is generally considered safe for use when it meets certain regulatory requirements and is used appropriately. However, there are some considerations and potential concerns related to plastic food packaging that I can highlight:

  1. Food-grade plastics: Plastic food packaging must meet specific safety regulations and be labeled as “food-grade.” Food-grade plastics are formulated to minimize the transfer of harmful substances into the food they contain.
  2. Migration of chemicals: There is a possibility that chemicals from the plastic packaging can migrate into the food over time, especially when exposed to high temperatures or acidic foods. Some of these chemicals, such as bisphenol A (BPA) and phthalates, have raised concerns due to their potential health effects.
  3. Single-use plastics: Single-use plastic packaging, such as disposable cutlery and water bottles, can be particularly problematic due to their impact on the environment and potential for microplastic contamination in food.
  4. Recycling and waste management: Proper recycling and waste management of plastic packaging are crucial to minimizing environmental pollution and ensuring the safe disposal of potentially harmful materials.
  5. Alternatives: Many consumers and manufacturers are exploring alternatives to plastic food packaging, such as biodegradable, compostable, or reusable materials.

It’s essential to keep an eye on the latest scientific research and updates from regulatory bodies to stay informed about any changes in the safety assessments of plastic food packaging. Different countries may have varying regulations and guidelines, so it’s a good idea to be aware of your local food safety standards.

In general, it’s advisable to:

  • Use plastic food packaging only as intended and avoid heating food in plastic containers unless they are specifically labeled as microwave-safe.
  • Consider using reusable containers for food storage whenever possible.
  • Recycle plastic packaging appropriately to reduce its environmental impact.
  • Stay informed about any developments or concerns related to plastic food packaging from reputable sources.

Always consult with health and safety experts or relevant authorities for the most up-to-date information and guidance on plastic food packaging safety.