High Quality Sprayer Suppliers

01 Select according to the caliber specifications of lotion pumps and bottles
Lotion pumps and bottle mouths are generally based on screw thread matching, and there is a common standard in the industry.Generally, suppliers produce lotion pumps according to this standard, and customers select lotion pumps according to this specification.Common calibers are 18mm, 20mm, 22mm, 24mm, 28mm, 33mm, and 38mm, and common specifications are 400, 410, and 415.



Standard example: Plastic Bottle Finish SP - 410



(List of common lotion pump size specifications)

Sealing test items in inspection and quality control, fill the bottle with colored water (or material body) according to product specifications, use the corresponding torque according to different calibers to match the pump head with the bottle, press the head in a locked state, place it horizontally, and vacuum test -0.03 ~ -0.06MPa/5min (different customers have different requirements). After the test, there is no leakage at the matching point between the bottle and the screw thread, the matching point between the body and the lock cover, and the pressing head. At the same time, it is required that the screw thread and the bottle mouth match smoothly without slipping, blocking, or skewing.



The bottle mouth is injection molded, the process is more stable, the mouth size and thread accuracy are higher, and it can meet higher sealing needs. For the bottle mouth structure of the product, the following aspects are generally considered:

First, the shape. Generally, the bottle mouth shape is designed to be round. The round shape is more conducive to ensuring the size accuracy of the bottle mouth, and better matches the lid for sealing and the distribution of the bottle body wall thickness during blow molding.



The second is the bottle mouth structure, which is generally divided into a threaded structure and a buckle structure. The threaded structure is more conducive to the sealing effect of the bottle and the lid. It is often used in pharmaceutical packaging, liquid beverages, and cosmetic bottle packaging. It is combined with various threaded caps, safety caps, nozzles, and pump heads, etc., and has high sealing reliability. The size and form of the thread can be flexibly selected according to product needs. The buckle structure is often used for solid or paste packaging, and can also be used for liquid packaging. The advantage is that it is easy to use and suitable for high-speed filling. However, when used as liquid packaging, attention should be paid to the design of the lid material, sealing structure, and interference, and process control should be done to ensure its sealing.



The third is the size of the bottle mouth. For PET, the bottle mouth size is relatively flexible, but for PP materials that are more suitable for molding wide-mouth bottles, the bottle mouth should not be too small, otherwise it will have a greater impact on the molding and wall thickness distribution of the product. Generally speaking, the ratio of the bottle body diameter to the bottle mouth diameter is less than 2 times.

02 Selection according to the characteristics of the viscosity/fluidity
Regarding the viscosity/fluidity of the liquid, the brand will have specific data, but for lotion pump manufacturers, these data are lacking.


Usually, the liquid can be poured into the beaker and judged according to the liquid surface condition:


(Diagram of bottle mouth size marking code)



A. The liquid surface can reach horizontal in an instant, and there is no trace on the liquid surface. All emulsion pumps and derivative pumps can be used. You only need to consider the characteristics of the liquid formula to choose the appropriate one.

B. The liquid surface can reach horizontal quickly, but there are slight traces of stacking on the liquid surface. The spray pump needs to verify its spray effect. Other emulsion pumps and derivative pumps can be used.



C. The liquid surface can reach horizontal in 1-2 seconds, and there are obvious traces of stacking on the liquid surface. It is necessary to use an emulsion pump with large suction and spring elasticity. High-viscosity pumps are preferred, followed by vacuum cans/bottles.

D. The liquid surface has obvious traces of stacking and cannot reach a horizontal state in a short time. High-viscosity pumps also need to be verified. Vacuum cans/bottles are preferred for packaging, or lid packaging is selected.





E. Invert the beaker containing the liquid. The liquid cannot be poured out in a short time. Only vacuum cans, or other packaging forms such as lids, hoses, cans, etc. can be used.

03 Select according to the compatibility of the lotion pump raw materials and the material body
Must be able to pass the compatibility test. Place the finished product that has been sprayed with liquid in a high-temperature box for 7 days, take it out and disassemble it to observe whether the parts are cracked, rusted, deformed, etc., and the liquid is not discolored or odor-changed. It is qualified.

04 Select according to the range of pumping volume
Before the product is launched on the market, there is generally a consumer survey link, and basically there will be a preliminary recommended usage. According to this usage, you can choose the specifications of the lotion pump, or the integer number of pumping times of the pumping volume reaches the recommended usage. Generally: recommended usage = (1-2) * pumping volume.


For example: if the recommended usage is 1.0 ml/time, you can choose a lotion pump with a pumping volume of 1.0 ml/time, or you can choose a lotion pump with a pumping volume of 0.5 ml/time.

05 Select according to the final packaging form

After confirming the packaging capacity, select the lotion pump specifications based on the size of the packaging capacity and the expected number of uses. Generally, the number of uses of a package is 100-300 times.





Example 1: A 100ml bottle has been confirmed, and the lotion pump can be selected with a 1.0ml/time lotion pump, which can be used about 100 times, or a 0.5ml/time lotion pump can be selected, which can be used about 200 times.



Example 2: A 500ml bottle has been confirmed, and the lotion pump can be selected with a 2.0ml/time lotion pump, which can be used about 250 times, or a 3.5ml/time lotion pump can be selected, which can be used about 140 times.

Introduction: Screen printing uses a silk screen as a base and a photosensitive platemaking process to create a screen printing plate with images and text. Screen printing consists of five key elements: the screen printing plate, squeegee, ink, printing table, and substrate. The image and text portion of the screen printing plate can be transferred through the ink mesh to various packaging materials, enhancing the packaging's appearance and conveying information.








Applications of Screen Printing in Cosmetic Packaging: It is used on bottles made of plastics such as PET and PP to print brand names, logos, ingredient lists, barcodes, and other information. Multiple overprints are possible to ensure vibrant colors and distinct layers. It is used on bottle caps made of materials such as ABS and acrylic to print logos and simple designs. Matte, pearlescent, or 3D gravure effects can be achieved, enhancing the visual and tactile quality of the packaging.



Process Flow

1. Design and Plate Making: A screen template is created based on the packaging design. 2. Equipment Adjustment: Secure the module to the screen printer and adjust the squeegee pressure and printing speed.

3. Printing: Print on the bottle or cap, ensuring even ink coverage.

4. Curing: Use LED or UV curing to ensure secure ink adhesion.

5. Inspection and Post-Processing: Check the printing results and perform surface coating if necessary.





Technical Points

1. Screen Printing: Use polyester or metal screen as the base material, manufactured according to the design.

2. Printing Parameter Control:

① Maintain the squeegee angle between 60-75 degrees to ensure even ink transfer and adapt to the surface tension of different substrates.

② Printing Pressure: Adjust according to the substrate thickness and ink characteristics to maintain clear images and text.

③ Screen Printing Mesh Count: Selecting the screen mesh count requires a comprehensive consideration of the design fidelity, slurry particle size, and process parameters. A higher mesh count results in denser threads, smaller pores, and higher-definition patterns. A lower mesh count results in larger pores, allowing the slurry to penetrate more easily, but also resulting in rougher pattern details. Therefore, the slurry particle diameter must be much smaller than the mesh diameter, otherwise it can easily clog the pores or prevent the pattern from printing.





Key Factors in Bottle Screen Printing Process

1. Bottle Surface Tension: The surface tension of the bottle affects the ink's durability after printing. Generally, the surface tension of the material should reach 50 dyn/cm to ensure that the ink does not readily rub off. If surface treatments such as corona treatment or flame treatment are not desired, products with a higher polarity can be printed directly or with an appropriate ink.



2. Ink Selection: To ensure ink durability on the bottle, select the appropriate ink for the bottle material. Different types and colors of inks have different adhesion to different bottle surfaces. If ink adhesion is critical, we can also try adding a curing agent or other auxiliary solvent to the ink to achieve the desired finish after printing.



3. UV Lamp: The key equipment for ink curing is the UV lamp. The choice of UV lamp specifications varies depending on the ink's composition, color, and thickness. To ensure that the ink adheres firmly to the product surface, the UV lamp can be selected to achieve the desired effect. Generally speaking, in actual product processing, different plastic materials and inks will encounter different problems during the screen printing process, and specific issues require specific analysis.







PS ：If you have any needs for plastic bottles and plastic jars, please contact us to place an order. Guangdong Hongyuan, as a plastic bottle and lotion pump manufacturer, is committed to providing customers with high-quality products and excellent service.

Premium Conditioner Bottles – Leakproof Design × High-End Aesthetics × Customizable Solutions

Direct from Trusted China Factory | Empowering Brands for Global Expansion



In today’s evolving hair care market, a high-performance, visually appealing, and sustainable conditioner bottle is essential for premium hair care brands, clean beauty labels, and cross-border e-commerce success.



Guangdong Hongyuan Dispensing Pump Co., Ltd. — with 12 years of experience in liquid packaging — is your trusted OEM/ODM manufacturer and wholesale supplier of high-quality plastic bottles designed for hair care, scalp treatments, organic personal care, and hotel amenities. We provide leakproof, versatile, and export-compliant packaging solutions that elevate your brand.



Product Highlights: More Than Just a Bottle — It’s a Brand Experience

We use food-grade PP and PET materials, offering excellent resistance to high-viscosity formulas, oils, and impact, suitable for:



✅ Regular conditioner | ✅ Hair masks | ✅ Scalp serums | ✅ Leave-in treatments | ✅ Hotel bulk sizes



Core Advantages Explained:



✅ Wide Mouth Design (38mm): Perfect for thick, high-viscosity formulas — no clogging, easy filling.

✅ Smooth Press Experience: Optimized pump head for high-viscosity liquids, ensuring smooth pressing and quick rebound, with over 5,000 presses without failure — premium feel guaranteed.

✅ High-End Appearance: Available in clear, frosted, colored, gradient, silk-screened, or metallic finishes. Perfect for creating minimalist, luxury, clean beauty, or baby-friendly designs.

Best-Selling Applications & Industry Fit

Chapter One

Premium Hair Care Brands



• 250ml–500ml standard bottles + matte pumps

• Supports high-end, minimalist, and luxury branding

Hotel & Spa Supplies

• 500ml+ large capacity + wall-mount design

• Ideal for hospitality and commercial settings

Chapter Two

Baby & Sensitive Scalp Care

• Small capacity + safety-lock pumps + gentle materials

• Designed for sensitive skin and baby-safe formulations

Cross-Border E-Commerce

• Lightweight + leak-certified + label space

• Suitable for Amazon FBA, Shopify, and independent stores

Chapter Three

Eco-Friendly Brands

• Helps brands achieve sustainability goals and green certifications

Private Label & Gifts

• Full logo customization + gift box options

• Perfect for corporate gifts and brand collaborations

Success Story: Partnering with “Rouse” to Achieve 80K+ Monthly Sales

When emerging hair care brand Rouse launched their high-viscosity hair mask, they faced issues like pump clogging, leakage, and generic appearance.



We provided a custom 300ml frosted PET bottle + matte white pump + wide mouth design:



✅ User feedback rated 94%+, with keywords like “smooth press,” “no clog,” and “luxury feel”

✅ Within two months of launch, monthly sales exceeded 80,000 units on e-commerce platforms.

“Hongyuan not only supplied the bottles but also gave professional advice on formula compatibility and visual design, helping us create a truly standout product.”



— Zhang, Brand Manager, Rouse



Full OEM/ODM Service | Small MOQ | Fast Turnaround

We’re a direct China factory with flexible, agile production capabilities:



✅ Low MOQ: From 5,000 units (standard), 10,000+ for custom

✅ Fast Development: 3D design in 7 days, molds ready in 15–20 days

✅ Free Samples: 2–3 sets available (shipping collect)

✅ Export-Ready: Provide test reports, compliance certifications, ensuring smooth customs clearance

✅ Logistics Support: FBA prep, overseas warehouse fulfillment, dropshipping

Our dedicated R&D and after-sales team ensure zero communication gaps, fast responses, and on-time delivery.



✅ Certified Quality You Can Trust

ISO 9001 Certified factory

Rigorous testing: leak, drop, high-viscosity compatibility, pump life

Full traceability: raw material → injection → assembly → QC → shipment

Complies with FDA, EU food contact, REACH standards — ready for US, EU, AU, SEA markets

Guangdong Hongyuan – Your Trusted Conditioner Bottle Supplier

Leakproof | Eco-Friendly | Custom Design | Small MOQ | Fast Delivery



Contact us today to get:



Free samples



Competitive wholesale pricing



Custom design proposals



Let’s build your next bestseller conditioner bottle — reliable, beautiful, and market-ready

Introduction Plastic caps play a crucial role across various industries, serving as an essential component for sealing and protecting products ranging from beverages to pharmaceuticals. Their ubiquitous presence underscores their importance in maintaining product integrity, ensuring safety, and providing convenience for consumers. This article delves into the multifaceted properties of plastic caps, exploring their types, manufacturing processes, applications, and emerging trends shaping the future. It also details core measurement methods to help plastic cap manufacturers and bottle cap manufacturers accurately match their packaging needs.



The development of plastic cap technology reflects advancements in materials science and industrial engineering. Innovation drives plastic bottle cap manufacturers to develop products that not only meet functional requirements but also respond to environmental demands through recyclable materials and sustainable production methods. For plastic bottle and cap suppliers, accurate measurement of plastic cap dimensions is a core prerequisite for ensuring sealing performance and reducing fit loss.



Types of Plastic Caps Plastic caps encompass a variety of designs and functions, adapting to the product needs of different industries. The most common types include screw caps, snap caps, flip caps, and dispensing caps. The dimensional measurement standards for each product need to be adjusted according to its structural characteristics:



Screw Caps: Widely used in the beverage industry due to their reliable sealing performance and ease of use, the thread size, inner diameter, and cap height are the core measurement parameters. (PET bottle cap manufacturers) must ensure a precise match between the thread and the container neck.



Flip Caps: Commonly used in personal care products such as shampoos and lotions, the one-handed operation design requires high precision in the flip-opening angle and snap size.



Dispensing Caps: Including pump heads, droppers, sprayers, etc. (Bottle cap wholesale suppliers) need to focus on measuring the outlet diameter and internal channel dimensions to ensure accurate flow control.



Child-proof Caps: Specifically designed for pharmaceutical packaging, in addition to basic dimensions, structural parameters related to the latch opening force must also be measured to meet safety standards.



Screw Caps: The threads of screw caps must perfectly fit the container neck, forming a tight seal when tightened. Dimensional measurements include key indicators such as the neck fitting diameter, thread pitch, and cap height. Bottle closures manufacturers typically incorporate tamper-evident features into their products, requiring related structural dimensions to be designed in conjunction with sealing performance.



Dispensing Caps: The core function of dispensing caps is to control product flow. Plastic bottle cap suppliers need to precisely measure for each application scenario: the pressing stroke of an emulsion pump, the inner diameter and length of the dropper, the nozzle orifice diameter of an atomizer, etc., directly impacting the user experience. For example, foam pumps require specific internal structural dimensions to achieve gas-liquid mixing, necessitating a balance between sealing and flow stability during measurement.



Manufacturing Process: Plastic cap production requires precision manufacturing processes, with dimensional accuracy maintained throughout. Injection molding is the mainstream method, injecting molten plastic into a mold to form caps of specific shapes and sizes. This method is suitable for mass production by plastic cap and closures manufacturers, enabling complex designs and tight tolerance control.



Material selection directly impacts dimensional stability. Common materials include polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). Bottle cap manufacturers must adjust mold dimensions based on the material's thermal expansion and contraction characteristics to ensure finished product dimensions meet standards. Innovative applications of environmentally friendly materials (such as biodegradable plastics) also place new demands on dimensional control, requiring optimized production processes while maintaining functionality.



Injection Molding: The four stages of injection molding—clamping, injection, cooling, and ejection—all require precise mechanical control. Plastic cap manufacturers ensure consistent dimensionality across batches through rigorous process management. The temperature and time parameters during the cooling stage directly affect the plastic's shrinkage rate, making it a crucial element for dimensional accuracy control.



Material Innovation: The research and application of sustainable materials is an industry trend. When using biodegradable and compostable materials, plastic bottle and cap suppliers need to recalibrate dimensional measurement standards. Because the physical properties of environmentally friendly materials may differ from traditional plastics, mold adjustments and multiple tests are necessary to ensure dimensional compatibility.



Cross-Industry Applications

The versatility of plastic caps makes them indispensable in many industries, with different sectors having varying focuses on dimensional measurement:

Food and Beverage Industry:Bottle cap wholesalers need to measure the inner diameter of the cap and the thickness of the sealing ring to ensure product preservation and leak prevention. For example, bottled water caps must fit tightly to the bottle opening to prevent leakage during transportation.

Pharmaceutical Industry: Child-proof caps require fastener dimensions and thread matching precision that meet stringent hygiene and safety standards. PET bottle cap manufacturers need to ensure the effectiveness of tamper-evident functions through dimensional testing.

Cosmetics Industry:The appearance and dimensions of the cap directly affect the product's aesthetics. Plastic bottle cap manufacturers need to balance dimensional accuracy with design quality.



Industrial Sector: Professional plastic caps that are resistant to chemical corrosion and high temperatures require measurement of wall thickness and sealing groove dimensions to ensure safe storage and transportation of industrial liquids.



Environmental Impact and Sustainability:The sustainability trends in the plastic cap industry also influence dimensional design and measurement. Bottle cap manufacturing companies reduce material usage through lightweight design, while maintaining structural strength and sealing performance despite size reduction. This requires more precise dimensional optimization measurements. In the recycling process, standardized dimensions help improve recycling efficiency. Plastic cap and closure manufacturers must adhere to industry-standard dimensional specifications to promote a circular economy.



Recycling Programs: For plastic caps made from recyclable materials (such as PP and PE), dimensional consistency is crucial for recycling and reprocessing. Plastic bottle cap suppliers must ensure uniform dimensions for similar products to facilitate sorting and remanufacturing during recycling, reducing resource waste.



Quality Control and Standards

The dimensional accuracy of plastic caps is the core of quality control. Bottle cap manufacturers must adhere to standards set by organizations such as the International Organization for Standardization (ISO) and conduct dimensional inspections using specialized equipment.

Key measurement indicators include: inner diameter (the core dimension matching the bottle opening), outer diameter (affecting appearance and grip), height (fitting the overall proportions of the container), thread dimensions (pitch, thread profile, effective thread length), and sealing structure dimensions (sealing ring thickness, groove depth).



Inspection equipment: Accurate measurements are performed using tools such as calipers, micrometers, and thread gauges. For mass production, automated inspection equipment can be used to ensure that the dimensional deviation of each batch of products is within acceptable limits.



Advanced quality control technologies (such as automated inspection systems and statistical process control) can promptly detect dimensional defects. Plastic bottle and cap suppliers can ensure dimensional consistency and reduce the outflow of defective products by monitoring the entire production process.



Conclusion: The dimensional accuracy of plastic caps directly determines the packaging's sealing performance, fit, and user experience, making it a core aspect of production and quality control for plastic bottle and cap suppliers. From type selection and manufacturing processes to cross-industry applications, dimensional measurement is crucial throughout the entire process, requiring precise control based on material properties, product functionality, and industry standards.



For bottle cap manufacturing companies, mastering scientific measurement methods and adhering to unified dimensional standards not only enhances product competitiveness but also meets the market's diverse demands for functionality, environmental friendliness, and user experience. As the industry moves towards sustainability and intelligentization, dimensional measurement technology will continue to upgrade, providing solid support for the innovative development of the plastic cap industry.

What is a Disc Top Cover?
A disc top cap (also known as press-top cap or flip-top cap) is a functional dispensing closure widely used in personal care and household cleaning packaging. It features a two-piece structure with an integrated flat disc and a central pivot axis.

Working Principle: Press down on one side of the disc, and the other side will lift up to reveal the dispensing orifice.Function: Allows one-handed dispensing of liquids and semi-liquids, commonly used for shampoo, body wash, lotion and other packaging.

A variety of disc top caps in custom colors and aluminum finishes (gold, silver) are displayed, together with flip-top caps, push-pull caps and other plastic dispensing closures.



1. Structural Design & Working Principle
The disc top cap is valued for its simple structure and reliable performance.


Lever Principle: The cap consists of a fixed base and a movable disc, which pivots on a central axis. Pressing the actuator lifts the disc like a seesaw to expose the dispensing hole.
Self-Sealing Function: Press the raised end back to reset, which fits tightly with the cap body and automatically seals the orifice.


2. Core Product Advantages
① Ergonomic Design & One-Hand Operation
Suitable for high-frequency use in bathrooms, kitchens and other scenarios. Easy to open and close even with wet or slippery hands, without twisting or removing the cap, making operation safer and more convenient.



② Precise Dispensing & Controlled Dosage
The orifice size can be adjusted for products from low to medium-high viscosity. It prevents splashing and over-dispensing for both thin toners and thick conditioners, reducing product waste.



③ Leak-Proof Sealing & Safe Transportation
In the closed position, the disc seals tightly with the orifice. Most models are equipped with inner sealing rings and reinforcing ribs to pass leakage tests, meeting requirements for ecommerce logistics and international transportation.

3. Technical Specifications & Compatibility

Common neck sizes: 18/410, 20/410, 24/410, 28/410
Material: PP (Polypropylene), PE
Discharge rate: Orifice size adjustable according to viscosity
Surface treatment: Glossy, matte, gold/silver aluminum coating

4. Wide Application Scenarios
Disc top caps are suitable for various liquid and gel products in daily chemicals, personal care, household cleaning and travel kits:




Shampoo, hair conditioner, hair oil
Body wash, hand soap, facial cleanser
Body lotion, toner, moisturizer
Hand sanitizer, disinfectant gel
Kitchen cleaner, dish soap, bathroom detergent
Travel bottles, hotel amenities, portable care products

They can be widely used in daily home use, hotel supplies, gyms, offices, travel and other scenarios.



5. Material & Production Process
Disc top caps are injection-molded from high-quality PP (Polypropylene).


Durability: Resists repeated pressing, high toughness, chemical corrosion resistance
Customization: Support Pantone color matching, surface texture, brand logo embossing and other customizations

As professional plastic cap manufacturers, bottle cap manufacturers, plastic bottle cap manufacturers, we are also reliable plastic bottles and caps suppliers and plastic bottle cap suppliers, providing global customers with stable, cost-effective complete packaging solutions.



6. Cooperation Model & Professional Services
We provide one-stop OEM/ODM services, supporting the whole process from brand positioning, 3D design, mold development, sample testing to mass production and export customs clearance.

✅ Flexible MOQ: 10,000 pcs for standard items, 30,000 pcs for customized items (support small-batch quick response)

✅ Short development cycle: 3D design within 7 days, mold completed in 15–20 days

✅ Free samples: 2–3 sets provided (freight collect)

✅ Professional team: 24-hour technical support, test reports and compliance documents to ensure efficient project implementation

✅ Quality commitment:Certified to ISO 9001 international quality management system.

Full-process quality control: raw material incoming → injection molding → assembly → inspection → shipment. Every step is traceable, with stable and reliable quality, safe for export to Europe, America, Japan and other regions.



Conclusion
Choose Guangdong Hongyuan Dispensing Pump Co., Ltd. — we create durable, safe and attractive “first touch” for your cleaning products.

Contact us now to get free samples + quotation + 3D design proposal!