Child-resistant packaging: A critical line of defense for protecting families and children

As consumers' safety awareness continues to improve, child-resistant packaging has become a vital part of the global market. Parents with children in the family, especially parents of infants and preschoolers, are well aware of the potential dangers of many items in the home environment to children. In this context, the significance of child-resistant packaging has become increasingly prominent. It is not only an effective means to ensure that children are protected from harmful substances, but also a key measure to improve the overall quality of life and safety level.

HDPE bottle with child resistant closure

Historical background of child-resistant packaging

The original intention of child-resistant packaging can be traced back to the 1970s, when the United States began to implement the "Poison Prevention Packaging Act" (PPPA). This law stipulates that any household products that may pose a danger to children (such as medicines, detergents and chemicals) must be packaged in a safe way to prevent children from accidentally ingesting or misusing them. This move significantly reduced the incidence of accidents caused by children's contact with these items and became the starting point for global safety packaging specifications.

ISO 8317 standard: a globally unified safety standard

ISO 8317 is one of the important international standards for child-resistant packaging certification. Its main goal is to ensure that the packaging design can effectively prevent children from misusing it, while also taking into account the convenience of adults when using it. The standard clearly states that qualified packaging must effectively prevent at least 80% of children aged 42 to 51 months from successfully opening the package. The implementation of this standard has unified and standardized child-resistant packaging worldwide, effectively ensuring the safety of children.

 

28mm child resistant cap for liquid

Taking into account both child safety and adult convenience

While ensuring the safety of children, the ISO 8317 standard also takes into account the convenience of adults, especially the elderly, when using packaging. For items used in daily household use, adults often need to be able to easily open and reseal the package, especially daily necessities such as medicines and cleaning products. Therefore, child-resistant packaging must not only have efficient protective performance, but also must take into account convenient adult operation. Through careful design, packaging can balance the needs of both, not only effectively preventing children from contacting dangerous items, but also ensuring that adults can use it without hindrance.

Global child-resistant packaging certification

Many countries and regions in the world have formulated child-resistant packaging standards similar to the US PPPA. ISO 8317 provides a unified quality standard for product packaging worldwide. If companies can strictly abide by these standards when designing and producing packaging, they can not only improve the safety of their products, but also effectively enhance the brand's trust among consumers. This global certification system enables child-safe packaging to circulate smoothly in the international market, effectively ensuring the safety of families around the world.

Enterprises should strictly abide by child-safe packaging standards

As global attention to consumer safety continues to heat up, more and more companies are aware of the importance of child-safe packaging. Whether in the design stage or the production process, companies need to strictly abide by international safety standards to ensure that packaging design can effectively prevent children from misusing it. This is not only a social responsibility of the company, but also can win the favor and trust of consumers for the brand. Child-safe packaging certification can not only help companies stand out in the fierce market competition, but also provide consumers with a more secure shopping experience.

Child-safe packaging certification plays a vital role in ensuring the safety of families and children. The implementation of the ISO 8317 standard provides a scientific basis and unified standards for child-safe packaging worldwide, helping companies to ensure product safety while taking into account the convenience of consumers. Companies should strictly follow relevant standards in the product design and packaging process to provide consumers with higher quality and safer products. 

What is ISO 8317 for Child-Resistant Closures (CRC)

ISO 8317 is an internationally recognized standard for Child-Resistant Closures (CRC), ensuring that packaging prevents children from accessing hazardous contents, such as pharmaceuticals, chemicals, and cleaning products. This standard sets requirements for packaging that balances safety and ease of use, offering secure protection against accidental poisoning while remaining accessible to adults.

child resistant cap

Key Features of ISO 8317:

Child-Resistant Testing:

ISO 8317 outlines stringent testing methods to ensure that children under 5 years old are unable to open CRC packaging. It also ensures that the closures remain functional throughout the shelf life of the product and can be easily opened and resealed by adults.

 

28mm child resistant cap for liquid

Reliable Performance:

The standard tests CRC closures for durability and long-term performance. It ensures that closures withstand repeated opening, closing, and resealing without compromising on safety.

Ease of Use for Adults:

While designed to be child-resistant, the closure mechanism must also allow adults to easily open and close it without excessive force or difficulty.

Design Specifications:

The standard specifies various design features, including closure type, locking mechanisms, and compatibility with container types. This ensures consistency and effectiveness for a wide range of products.

Compliance with Global Safety Standards:

ISO 8317 helps manufacturers comply with child-safety regulations globally. It ensures that products meet the high standards necessary for consumer safety and legal compliance.

Why ISO 8317 is Important

Child Safety: The primary goal of ISO 8317 is to protect children from accessing hazardous substances that could lead to poisoning, which is especially critical for pharmaceutical, chemical, and household products.

Regulatory Compliance: Many countries and regions require CRC packaging that complies with ISO 8317, ensuring that manufacturers meet legal packaging standards.

Consumer Confidence: ISO 8317 certification provides consumers with the peace of mind that products are packaged with the highest level of child safety in mind.

Our Product Range

We offer a variety of ISO 8317-compliant CRC caps, ensuring that we meet the diverse needs of our customers across multiple industries. Our caps are designed for safety, reliability, and ease of use, and we provide the following sizes:

28mm CRC Cap

33mm CRC Cap

38mm CRC Cap

45mm CRC Cap

Each of these sizes adheres to the strict requirements set by ISO 8317, offering reliable child-resistant functionality and a secure seal for a wide range of products. Whether you’re packaging pharmaceuticals, nutraceuticals, or household products, our 28mm, 33mm, 38mm, and 45mm CRC caps ensure that your product remains safely sealed and compliant with international safety standards.

Conclusion

ISO 8317 plays a critical role in ensuring that Child-Resistant Closures (CRC) meet global safety standards. By incorporating 28mm, 33mm, 38mm, and 45mm CRC caps, we provide packaging solutions that ensure child safety while still being practical and easy for adults to use. Our ISO 8317-compliant caps offer peace of mind and protection, helping to reduce the risk of accidental poisoning and ensuring the secure containment of hazardous substances.

Ready to secure your products with trusted child-resistant solutions? Explore our range of ISO 8317-compliant CRC caps today.

Differences in the design of oral liquid bottle caps for glass bottles and plastic bottles

 In the packaging design of oral liquids, the selection of medicinal bottle caps is crucial. Especially for oral liquid screw caps with child protection function, there are certain differences in the internal design between glass bottles and plastic bottles.

 

28mm child resistant cap for liquid

Background and risks of oral liquids

As a pharmaceutical preparation with good taste, oral liquids are extracted from Chinese herbal decoctions, and additives such as flavoring agents and antibacterial agents are added, and are sealed in bottles in a sterile or semi-sterile form. However, because of its taste close to that of beverages, it is easy for children to mistake it for ordinary drinks, and there is a risk of accidental ingestion. The physiological characteristics of children determine that they have low tolerance for drugs, and excessive consumption may bring serious consequences and even endanger life.

60ml HDPE dry syrup bottle

Design of water-based screw caps

In order to reduce the risk of accidental ingestion of oral liquids, water-based screw caps with child protection function are often used. This cap adopts an inner and outer double-layer structure design, and the inner and outer caps are connected by a card slot. When opening the cap, it is necessary to press down the outer cap and rotate it at the same time to drive the inner cap to rotate together and complete the opening action. This design can effectively prevent children from opening the package at will in a short time, reducing the risk of accidental ingestion.

Differences between glass bottles and plastic bottles

Although the water-based screw-on caps are used in both glass bottles and plastic bottles, there are certain differences in their internal designs. It is mainly reflected in the gasket inside the cap. The gasket of the glass bottle cap is relatively thicker, while that of the plastic bottle is relatively thinner. This difference is mainly determined by the different materials of the bottles. Glass bottles are relatively more brittle, and the increase in the thickness of the gasket can enhance its performance in sealing and pressure resistance, ensuring that the liquid is not easy to leak. Since the material of plastic bottles is relatively soft, the gasket of the cap can be relatively thin, which can ensure the sealing and reduce the production cost at the same time.

The design difference between the oral liquid bottle caps in glass bottles and plastic bottles is mainly reflected in the thickness of the gasket, which is determined according to the material of the bottle body and aims to ensure the good sealing of the bottle. Through reasonable design and selection, the water-based screw-on cap can effectively reduce the risk of accidental ingestion of oral liquid and ensure the safety of children's medication.

Xinfuda Unveils Innovative Multifunctional 28mm Cap: CRC and Desiccant Cap

 Shijiazhuang, China – Xinfuda Medical Packaging, a global leader in advanced packaging solutions, proudly announces the launch of its latest innovation: the multifunctional 28mm cap. This new cap combines the features of a child-resistant closure (CRC) with an integrated desiccant, setting a new standard in packaging technology for pharmaceuticals and other sensitive products.

28mm Silica Gel Cap with Child Resistant

 

Dual-Functionality for Enhanced Safety and Preservation

The multifunctional 28mm cap is designed to address two critical needs: child safety and product preservation. The child-resistant feature ensures that medications and other potentially hazardous substances are kept out of reach of children, significantly reducing the risk of accidental ingestion. The integrated desiccant, on the other hand, protects the contents from moisture, maintaining the integrity and efficacy of the product over time.

Innovative Design and Material Excellence

Crafted from high-quality, durable materials, Xinfuda's new cap is engineered for reliability and longevity. The cap's design not only ensures a tight seal to prevent contamination but also incorporates a user-friendly mechanism that makes it easy for adults to open while remaining secure against tampering by children. The built-in desiccant is seamlessly integrated, providing continuous moisture protection without the need for additional packaging components.

Versatility and Wide Application

The 28mm multifunctional cap is suitable for a wide range of applications, including pharmaceuticals, nutraceuticals, and other moisture-sensitive products. Its versatility makes it an ideal solution for manufacturers looking to enhance the safety and shelf life of their products. By combining CRC and desiccant functions in a single cap, Xinfuda offers a streamlined, cost-effective packaging solution that meets the highest standards of safety and quality.

Commitment to Innovation and Quality

Xinfuda's introduction of the multifunctional 28mm cap underscores its commitment to innovation and excellence in the packaging industry. The company continues to leverage cutting-edge technology and advanced materials to develop products that meet the evolving needs of its clients and the regulatory landscape.

Conclusion

With the launch of the multifunctional 28mm cap, Xinfuda Medical Packaging once again demonstrates its leadership in providing advanced, reliable, and user-friendly packaging solutions. This new cap is poised to make a significant impact on the industry by enhancing product safety and longevity, ultimately benefiting manufacturers and consumers alike.

The PP28 Cap for Glass Bottles: An Essential Component in Modern Packaging

 In the world of packaging, from the material of the container to the seal that keeps the contents fresh, every element plays a crucial role in ensuring product quality and consumer satisfaction. One such essential component is the PP28 cap, a seemingly small but vital part of many glass bottles used in various industries, including beverages, pharmaceuticals, and personal care.

 

28mm child resistant cap for glass liquid

What is a PP28 Cap?

The PP28 cap is a type of plastic screw cap made from polypropylene (PP), designed to fit bottles with a 28mm neck finish. The "PP" stands for polypropylene, a durable and versatile thermoplastic polymer, and "28" refers to the diameter of the bottle neck in millimeters. This cap is widely used due to its excellent sealing properties, cost-effectiveness, and ease of use.

Key Features and Benefits

1. Durability and Safety

Polypropylene is known for its high resistance to chemicals, making PP28 caps suitable for a variety of liquids, including acidic and alkaline substances. This resistance ensures that the cap does not degrade or react with the contents of the bottle, maintaining the integrity and safety of the product.

2. Excellent Sealing

One of the primary functions of any cap is to provide a secure seal that prevents leakage and contamination. PP28 caps are designed to create a tight seal, often incorporating a tamper-evident band that provides a visual indication if the bottle has been opened. This feature is crucial for maintaining the freshness of beverages and the efficacy of pharmaceuticals.

3. Versatility

PP28 caps are versatile and can be used with various types of glass bottles. They are common in the beverage industry, particularly for soft drinks, juices, and water, as well as in the pharmaceutical and personal care sectors. This versatility makes them a go-to choice for manufacturers looking for reliable and consistent packaging solutions.

4. Cost-Effectiveness

Compared to other types of caps, PP28 caps are relatively inexpensive to produce. Their low production cost, combined with their effectiveness, makes them an economical choice for both large-scale manufacturers and smaller producers.

5. Recyclability

Polypropylene is a recyclable material, which adds an eco-friendly aspect to the PP28 cap. As sustainability becomes increasingly important to consumers and businesses alike, using recyclable materials in packaging is a significant advantage.

Applications of PP28 Caps

Pharmaceuticals

In the pharmaceutical industry, the safety and integrity of packaging are critical. PP28 caps provide a secure seal that protects medicinal liquids from contamination and degradation. The tamper-evident feature is particularly important in this sector to ensure that medications remain safe for consumption.

PET amber bottle

Conclusion

The PP28 cap may seem like a small and insignificant part of a glass bottle, but its role in ensuring product safety, quality, and consumer satisfaction is immense. From beverages to pharmaceuticals, this versatile cap is a trusted component in various industries, thanks to its durability, excellent sealing properties, and cost-effectiveness. As sustainability continues to drive packaging innovation, the recyclability of polypropylene adds another layer of value to the PP28 cap, making it a smart choice for modern packaging needs.

5ml oral dosing pipette

Whether you are a manufacturer looking for reliable packaging solutions or a consumer appreciating the quality and safety of your products, the PP28 cap is a perfect example of how small components can make a big difference.

28mm cap with deiccant or without desiccant application in pharmaceutical

 In the pharmaceutical industry, the use of 28mm caps with or without desiccants is determined by the specific requirements of the medication being packaged. Here's a breakdown of the applications and considerations for each:

28mm Silica Gel Cap with Child Resistant

28mm Cap with Desiccant Applications:

Moisture-Sensitive Medications: Medications that are hygroscopic or sensitive to moisture require protection to maintain their efficacy and stability. This includes certain tablets, capsules, and powders.

Extended Shelf Life: Products that need an extended shelf life benefit from the moisture absorption properties of desiccants, preventing degradation over time.

Biopharmaceuticals: Some biological products, which are often sensitive to environmental conditions, might also use desiccant caps.

Considerations:

Material Compatibility: The desiccant must be compatible with the pharmaceutical product and the packaging material.

Regulatory Compliance: Desiccants used in pharmaceutical packaging must meet regulatory standards for safety and efficacy.

Cost: Desiccant caps are typically more expensive due to the additional materials and manufacturing processes involved.

 

28mm child resistant cap for liquid

28mm Cap without Desiccant Applications:

Non-Hygroscopic Medications: Products that are not sensitive to moisture do not require desiccants. This includes many liquids, non-hygroscopic tablets, and some ointments.

Short-Term Use: Medications that are intended for short-term use or have a rapid turnover may not need the added protection of a desiccant.

Moisture-Resistant Formulations: Some medications are formulated to be inherently resistant to moisture, negating the need for additional desiccants.

Considerations:

Cost-Effectiveness: Caps without desiccants are generally cheaper to produce and purchase.

Simplicity in Packaging: Simplifies the packaging process and reduces potential compatibility issues with desiccant materials.

Environmental Impact: Reduces the use of additional materials, which may be beneficial from an environmental perspective.

Decision Factors

Moisture Sensitivity of the Product: Determine if the medication degrades or loses potency when exposed to moisture.

Shelf Life Requirements: Assess how long the product needs to remain stable on the shelf.

Storage Conditions: Consider the typical storage conditions (temperature and humidity) the product will be exposed to.

Cost-Benefit Analysis: Weigh the costs of using desiccant caps against the potential benefits of increased product stability and shelf life.

Regulatory Requirements: Ensure compliance with all relevant pharmaceutical regulations and guidelines for packaging.

Summary

Using 28mm caps with desiccants is essential for moisture-sensitive medications to ensure their stability and efficacy over time. For products that are not affected by moisture, caps without desiccants are a cost-effective and simpler option. The decision should be based on the specific needs of the pharmaceutical product, considering factors like moisture sensitivity, shelf life, storage conditions, cost, and regulatory requirements.

Design Differences Between 28mm Child-Resistant Caps for Solids and Liquids

 In the pharmaceutical field, safety is always one of the primary considerations, especially regarding incidents of children accidentally ingesting medications. Special packaging designs can greatly reduce the probability of accidental ingestion, protecting children's safety. For solid and liquid medications, there are distinct differences in the design of child-resistant caps.

Common Features of Dual-Layer Structure Design

Safety caps for oral medications generally adopt a dual-layer structure design, which aims to increase the difficulty of opening and reduce the likelihood of children accidentally ingesting medications. This design requires the user to both press down and rotate simultaneously to open the cap. This dual-action requirement makes it difficult for children to easily open the medication, effectively preventing accidental incidents.

Silica Gel Cap with Child Resistant

Special Design of Child-Resistant Caps for Solids

Child-resistant caps for oral solid medications have their unique characteristics. The most notable difference lies in the top design of the cap. The safety cap for solid medications typically has a small chamber at the top of the cap to store desiccants. This design not only keeps the medication dry, extending its shelf life, but also absorbs moisture, ensuring the stability of the medication's quality.

Stringent Requirements for Child-Resistant Caps for Liquids

In contrast, child-resistant caps for liquid medications have stricter requirements for gaskets. Since liquid medications are prone to leakage, the safety cap must have higher sealing performance. To enhance sealing and prevent medication leakage, the gasket requirements for liquid safety caps are more stringent, and the manufacturing process is more complex. This design ensures that liquid medications do not leak during long-term transportation and storage, guaranteeing the quality and safety of the medication.

 

28mm child resistant cap for liquid medicine

Conclusion

There are clear design differences between child-resistant caps for solid and liquid medications, but their common goal is to enhance medication safety and reduce the risk of children accidentally ingesting medications. Through reasonable design and strict manufacturing processes, these two types of safety caps can effectively protect children from the dangers of accidental ingestion, providing reliable protection for children's medication safety.

Securing Wellness: Exploring the Role of Pharma Caps for Oral Liquid Bottles

 In the realm of pharmaceuticals, ensuring the safety, integrity, and ease of use of medications is paramount. This is particularly true for oral liquid medications, where precise dosing and contamination prevention are crucial. Enter the pharma cap for oral liquid bottles, a simple yet essential component that plays a significant role in maintaining the quality and safety of liquid medications. In this blog, we'll delve into the features, benefits, and importance of pharma caps for oral liquid bottles in the pharmaceutical industry.

 

28mm child resistant cap for liquid medicine

Understanding Pharma Caps for Oral Liquid Bottles:

Pharma caps, also known as pharmaceutical closures, are specially designed caps used to seal oral liquid bottles containing medications, syrups, and suspensions. These caps serve multiple purposes, including preventing spillage, protecting the contents from contamination, and ensuring accurate dosing through specialized dispensing mechanisms. Designed with precision and functionality in mind, pharma caps are an indispensable component of pharmaceutical packaging, particularly for oral liquid formulations.

PET amber bottle

Key Features and Benefits:

Tamper-Evident Seals: Pharma caps for oral liquid bottles often come equipped with tamper-evident seals, providing visual indicators of product integrity. These seals help reassure consumers that the medication has not been tampered with and is safe for consumption, enhancing trust and confidence in the product.

Child-Resistant Design: 

To prevent accidental ingestion by children, many pharma caps are equipped with child-resistant features, such as push-and-turn or squeeze-and-turn mechanisms. These child-resistant closures require a series of coordinated movements that are challenging for young children to manipulate, reducing the risk of accidental poisonings.

Dosing Accuracy: 

Pharma caps are designed to facilitate accurate dosing of oral liquid medications through specialized dispensing mechanisms. Some caps feature built-in droppers or measuring devices that allow for precise measurement and administration of the prescribed dosage, ensuring consistency and efficacy in treatment.

5ml oral dosing pipette

Contamination Prevention: 

The tight seal provided by pharma caps helps protect the contents of oral liquid bottles from contamination by external factors, such as dust, moisture, and airborne pathogens. This safeguarding of product integrity ensures that medications remain stable and effective throughout their shelf life, minimizing the risk of adverse reactions or treatment failure.

Ease of Use: 

Despite their advanced features, pharma caps are designed to be user-friendly and easy to handle for both healthcare professionals and consumers. Intuitive opening and closing mechanisms, coupled with clear labeling and instructions, enhance convenience and promote compliance with medication regimens.

Impact on Pharmaceutical Safety and Compliance:

The implementation of pharma caps for oral liquid bottles has had a profound impact on pharmaceutical safety and compliance. By providing multiple layers of protection, including tamper-evident seals and child-resistant features, these caps help mitigate risks associated with medication misuse, tampering, and accidental ingestion.

Furthermore, pharma caps support pharmaceutical manufacturers in meeting regulatory requirements and quality standards related to medication packaging and safety. Compliance with regulations, such as those set forth by regulatory agencies like the Food and Drug Administration (FDA), ensures that medications meet stringent safety and efficacy standards before reaching consumers.

In conclusion, pharma caps for oral liquid bottles play a vital role in safeguarding the integrity, safety, and efficacy of liquid medications. Their innovative design features, including tamper-evident seals, child-resistant mechanisms, and precise dosing capabilities, contribute to enhanced pharmaceutical safety and compliance. As pharmaceutical manufacturers continue to prioritize patient safety and quality assurance, the importance of pharma caps in ensuring the secure and reliable delivery of oral liquid medications cannot be overstated.

LDPE Gasket-Cap for Oral Dosage

 As children grow up, their curiosity and desire to explore are unstoppable. One of the problems that worries parents is the accidental ingestion of medicines. In order to ensure the safety of children, the child resistant cap of oral preparations reduces the risk of children accidentally ingesting medicines by making it more difficult to open, giving parents more peace of mind. In the production of this kind of child resistant cap, one of the commonly used gasket materials is LDPE (low density polyethylene).

Cap split view

 

28mm child resistant  cap for liquid medicine

LDPE material: light and tough, safe and reliable

LDPE is a lightweight yet tough plastic material with good durability and toughness that is not easily torn or penetrated. This property makes LDPE an ideal choice for childproof cap gaskets for oral dosage forms. Gaskets made of LDPE have undergone strict quality inspection and safety certification, and comply with relevant pharmaceutical industry standards and regulatory requirements.

Strong adaptability: meet different drug needs

There are many types of oral preparations, and gaskets made of LDPE have excellent adaptability and can meet the needs of different drug packaging. Whether it is solid tablets, liquid pharmaceuticals or other oral preparations, LDPE gaskets can provide reliable protection and ensure the quality and safety of pharmaceuticals.

Environmentally sustainable: the responsible choice

In addition to its excellent performance in terms of safety, LDPE material also has good environmental sustainability. As a recyclable plastic material, it is more in line with the needs and requirements of sustainable social development.

Why liquid preparations should use child-resistant cap

 Child-proof bottle is a special packaging container with child protection function. It is mainly used to prevent children from opening the package at will and accidentally ingesting medicines. Our common tablets, capsules and other medicines all use this kind of packaging. In addition, it also includes some liquid preparations, such as oral liquids, syrups, etc.

 

28mm child resistant  cap for liquid medicine

Oral liquids and syrups generally taste sweet. Children are in the growth and development period and are curious about many things. It is easy for them to treat such drugs as drinks, causing accidental ingestion and serious consequences.

PET amber bottle

The special design of the child-proof bottle is mainly reflected in the lid. It adopts an inner and outer double-layer structure design. The lid is marked with a push-down and rotation mark. Normal adults can easily open the package according to the mark guidance. For children who are in the developmental stage, it is often difficult for them to apply force in two different directions at the same time. This prevents them from opening the package at will in a short period of time, thereby reducing the risk of accidentally ingesting medicines.

5ml oral dosing pipette

10ml oral dosing syringe

Three major factors that affect the size of child resistant cap

 Child Resistant Cap for oral preparations are an important part of pharmaceutical packaging, and they play a very important role in the sealing of the entire packaging. The size of the cap is related to whether it can achieve a good fit with the bottle mouth, which in turn affects the sealing of the packaging. During the production process, the factors that affect the size of the cover mainly include the following three aspects:

28mm bottle cap

child resistant cap

1. Holding pressure and time

As the holding time increases, the weight of the bottle cap gradually increases, resulting in an increase in volume. Similarly, as the holding pressure increases, the weight of the raw material increases in the same period of time, and the weight of the bottle cap increases, which will lead to an increase in volume (increase in size).

2. Cooling time

Regardless of visual analysis or experimental data, as the cooling time of the medicine bottle cap in the mold increases, the temperature of the bottle cap will obviously show a linear decrease. This phenomenon also exists when the lid is cooled after demoulding, but it will take longer to reduce the same temperature. That is to say, within the same period of time, the cooling effect in the mold is far better than the cooling after demoulding.

The cooling rate (°C/min) will affect the density of the cap. As the cooling rate increases, the density of the bottle cap gradually decreases.

That is, as the cooling time increases, the grammage remains unchanged and the density decreases, the volume becomes larger (the size becomes larger).

3. Raw material temperature

As the temperature of the raw material increases, if the cooling time remains unchanged, the temperature of the resulting bottle cap will be higher. After natural cooling after demoulding, the volume will become smaller (the size will become smaller) due to the principle of thermal expansion and contraction. The injection molding equipment parameters corresponding to the raw material temperature include screw temperature and mold temperature.

The above are the three major factors that affect the size of medicinal bottle caps. When producing caps, you should focus on these three aspects of data to ensure the accuracy of the finished product size.