A Better Starting Point for Short, Wide, High-Clarity PET Jars
Producing a short, wide PET jar requires a preform designed for substantial radial stretching. Using the wrong preform geometry can lead to thin shoulders, uneven walls, excessive base material, haze, or unstable finished dimensions.
Supply-Packagings manufactures wide-mouth PET jar preforms with a compact dome body for stretch blow molding. The broad threaded neck and short body are suited to finished containers such as supplement jars, gummy bottles, cosmetic jars, food containers, and selected pharmaceutical containers.
For fast sourcing, provide your finished jar capacity, diameter, height, neck finish, and target quantity. We can match an existing preform or evaluate an OEM/ODM specification.
Key Product Benefits
◈ Short dome geometry designed for wide-mouth PET container production
◈ Wide threaded neck simplifies filling of gummies, capsules, powders, creams, and granules
◈ High-transparency PET supports clear, premium finished containers
◈ Precision-molded neck finish improves compatibility with matching screw closures
◈ Multiple gram weights available for different finished jar dimensions
◈ Clear, amber, blue, green, opaque, and custom color projects available
◈ Matching caps, liners, and sealing solutions can be sourced together
◈ Factory-direct manufacturer and supplier for OEM, ODM, and wholesale custom packaging programs
Product Overview
This product is a short wide-mouth PET preform with a rounded dome-shaped body, support flange, and molded threaded neck. It is an intermediate packaging component used to manufacture finished PET jars through reheating and stretch blow molding.
Common purchasing terms include:
- Wide-mouth PET preform
- PET jar preform
- Short PET preform
- Dome PET preform
- Wide-neck bottle preform
- Plastic jar blow-molding preform
The dome geometry concentrates PET material close to the wide neck and shoulder-forming region, making this type of structure useful for appropriately engineered short and broad finished containers.
How the Preform Becomes a Finished Jar
Preform injection molding
PET resin is dried and injection molded into the preform. At this stage, the neck, thread, support ring, and thick dome-shaped body are formed.
Controlled reheating
During secondary processing, the preform body is heated while the neck finish is kept dimensionally stable.
Stretch blow molding
The heated PET is stretched and expanded against the walls of the finished jar mold using compressed air.
Cooling and final formation
The PET cools against the mold surface, creating the finished jar while retaining the original preform neck finish.
This is why preform weight, concentricity, material distribution, neck dimensions, and heating behavior are critical to finished packaging performance.
Designed to Solve Wide-Mouth Blow-Molding Problems
Thin Shoulders on Finished Jars
Short, broad containers require substantial material expansion near the shoulder. A preform with unsuitable geometry may leave insufficient PET in this region.
We recommend matching the preform to the finished jar drawing and validating the final distribution through blow trials.
Uneven Sidewalls
Off-center preform cores or unbalanced heating can create non-uniform stretching. Dimensional consistency and correct processing help reduce this risk.
Cap Fit Changes Between Orders
Because the finished jar uses the original injection-molded preform neck, neck variation directly affects closure performance. Matching caps and preforms as one system can simplify qualification.
Clear PET Becomes Hazy
PET clarity can be influenced by resin condition, moisture, reheating, crystallization, and processing parameters. Correct material handling and blowing conditions are necessary to obtain high transparency.
Finished Empty Jars Take Up Too Much Freight Space
Buyers with local blow-molding capability can import compact preforms instead of finished empty jars, substantially improving shipping and warehouse utilization.
Structural Features
Dome-Shaped PET Body
The short rounded body stores the PET material that will be stretched into the finished jar. Its geometry can support the high radial expansion required by wide containers when correctly matched to the final mold.
Wide Threaded Neck
The large opening makes the finished container practical for products that cannot be dispensed easily through narrow-neck bottles.
Typical contents include:
- Gummies
- Capsules
- Tablets
- Nutrition powders
- Cosmetic creams
- Bath salts
- Candy
- Dry food products
Support Flange
The flange provides a handling surface for injection, conveying, reheating, and blow-molding equipment.
Molded Closure Thread
The closure thread is completed during injection molding rather than blow molding, providing a stable foundation for matching caps and sealing systems.
Technical Specifications
| Parameter | Available Options |
|---|---|
| Product Name | Wide-Mouth Dome PET Jar Preform |
| Material | PET |
| Standard Appearance | High-clarity transparent |
| Color | Clear, amber, blue, green, black, white, custom |
| Structure | Short dome body with wide neck |
| Neck Type | Threaded |
| Neck Diameter | Multiple wide-mouth specifications available |
| Preform Weight | Multiple gram weights according to finished jar |
| Body Height | Short profile, specification-dependent |
| Finished Container | PET jar, wide-mouth bottle, canister |
| Final Capacity | Determined by preform and blow-mold combination |
| Closure | Matching plastic screw cap |
| Sealing | Foam liner, induction or other options where compatible |
| MOQ | Depends on weight, neck, resin, color, and tooling |
| Sampling | Existing models available for testing |
| Custom Tooling | Available for qualified ODM projects |
| Packing | Sealed bag, reinforced carton, pallet |
| Shipping | Sea, air, express |
| Trade Terms | FOB, CIF, DDP by destination |
Exact material grade, weight, dimensions, tolerances, neck finish, and blow-molding parameters should be confirmed during project qualification.
Closure and Sealing Compatibility
Standard Screw Caps
Smooth and ribbed closures can be matched to the threaded neck for supplement, food, cosmetic, and daily chemical packaging.
Foam Liners
PE or EPE liners can provide compression sealing and improve reclosure performance after the finished jar is opened.
Induction Seal Liners
For suitable finished jars, induction sealing can provide tamper evidence and additional protection against moisture exchange or contamination.
Pressure-Sensitive Seals
These can be considered where the product and closure system permit a simpler first-opening seal.
Child-Resistant Closures
CRC solutions can be evaluated for compatible pharmaceutical and supplement jar projects.
Industries Served
🔵 Supplement Packaging — gummies, tablets, capsules, protein powders, collagen powders, sports nutrition
🔵 Cosmetic Packaging — creams, masks, scrubs, bath salts, hair treatments
🔵 Food Packaging — candy, nuts, spices, dry foods, powdered products
🔵 Pharmaceutical Containers — selected solid-dose and powder products subject to qualification
🔵 Daily Chemical Packaging — powders, cleaning tablets, fragrance beads, compatible granules
🔵 Jar Packaging Manufacturers — factories producing finished PET containers from preforms
Application Scenarios
⬢ Gummy vitamin jars requiring wide openings for easy dispensing
⬢ Protein and nutrition powder jars with scoops
⬢ Premium transparent cosmetic jars for scrubs and bath products
⬢ Food containers for candy and dry snacks
⬢ Pharmaceutical-style tablet jars with tamper-evident closure systems
⬢ Local blow-molding plants importing preforms instead of bulky finished containers
⬢ Reusable primary jars paired with lightweight refill pouch packaging
Product Advantages
Optimized for Short Wide Containers
The dome structure offers a different material distribution pattern from long bottle preforms, making it suitable for appropriately engineered wide-mouth jar projects.
Consistent Neck for Reliable Closures
The neck finish is molded before the blowing stage. Stable dimensions help maintain cap engagement and simplify repeat production.
Lower International Logistics Volume
Preforms are compact compared with blown jars, creating a major logistics advantage for buyers with local blow-molding equipment.
Custom OEM and ODM Programs
OEM buyers can choose available tooling and customize preform color, caps, liners, and secondary packaging. ODM buyers can develop new weights, neck specifications, preform geometry, and finished jar molds.
One Supplier for Complete Packaging
Supply-Packagings can coordinate the preform with closures, liners, finished bottle and jar packaging, refill pouch programs, labels, and paper boxes for a more efficient custom packaging supply chain.
Quality Control
Critical production and receiving points can include:
◇ Preform gram-weight verification
◇ Neck and thread dimensional inspection
◇ Body concentricity checks
◇ Transparency and contamination inspection
◇ Injection gate condition
◇ Support flange dimensions
◇ Matching cap engagement tests
◇ Color comparison for custom resin programs
◇ Batch and packing traceability
Final performance must be validated on the buyer’s actual blow-molding equipment with the intended mold, closure, contents, filling process, and storage conditions.
Packaging and Logistics
Bulk Protection
Preforms can be packed in clean inner bags inside reinforced export cartons. Packing density is controlled to protect neck threads, prevent excessive rubbing, and maintain handling efficiency.
For large wholesale orders, palletizing and stretch wrapping are available to simplify warehouse receiving and forklift handling.
Global Freight Options
Sea freight offers the best economics for high-volume preform orders. Air freight can support urgent production requirements, while express courier is typically used for sampling and machine trials. DDP service can be evaluated for selected destinations.
Frequently Asked Questions
Q1. Is this a finished jar?
No. It is a PET preform designed to be reheated and stretch blow molded into a finished wide-mouth jar or container.
Q2. Why is this preform so short and wide?
Its geometry is intended for appropriate finished containers that require substantial radial expansion, such as short wide-mouth jars.
Q3. Can it produce gummy supplement jars?
Yes, depending on the selected preform weight, neck finish, and finished jar design. Blow trials should confirm wall distribution and mechanical performance.
Q4. Can you supply matching caps and liners?
Yes. Screw caps, foam liners, induction sealing options, and selected child-resistant closures can be coordinated.
Q5. Can the PET be colored?
Yes. Clear and custom tinted or opaque colors can be evaluated. Finished color should preferably be approved after blow molding because stretching changes color density.
Q6. Can the same preform make several jar sizes?
Potentially, but feasibility depends on stretch ratios, material weight, jar geometry, and performance targets.
Q7. Can you help develop the finished jar mold?
Yes. ODM support can include preform selection, jar design, blow mold development, and closure matching.
Q8. What information do you need for a quote?
Finished jar capacity, diameter, height, mouth size, product type, estimated quantity, and destination are the most useful starting details.
Buyer Feedback
★★★★★ Improved our wide-mouth jar blowing stability
“The short preform matched our jar geometry better than the longer version we previously used. Shoulder distribution became much more consistent.”
— Production Engineer, PET Container Factory
★★★★★ Closure matching simplified qualification
“We sourced the preform, screw cap, and liner together. That saved time during our packaging validation.”
— Packaging Manager, Supplement Manufacturer
★★★★★ Much better logistics than importing finished jars
“Our local blowing line gave us the option to import preforms. Warehouse space and inbound freight became much easier to manage.”
— Procurement Lead, Packaging Distributor
Related Product Categories
- Wide-Mouth PET Jar Preforms
- Short PET Preforms
- Standard PET Bottle Preforms
- PET Supplement Jars
- Gummy Vitamin Jars
- Protein Powder Containers
- Cosmetic Jars
- Pharmaceutical Containers
- Plastic Screw Caps
- Child-Resistant Closures
- Induction Seal Liners
- Bottle Packaging
- Flexible Packaging
- Refill Pouch Packaging
- Custom Packaging Services
Visit our products page for complete packaging development support.
Get the Right Preform Before You Cut the Final Jar Mold
The most efficient development process starts by matching the preform, finished jar geometry, neck finish, and closure before mass production. Send us your target jar capacity, mouth diameter, overall dimensions, product category, and estimated annual quantity. If you already have a finished container or preform, a physical sample can be used for matching.
For buyers with local blowing equipment, machine model, cavity count, maximum neck size, and target output can help speed up compatibility evaluation.
Supply-Packagings provides OEM, ODM, factory-direct wholesale production for PET preforms and coordinated custom packaging across bottle, jar, pouch, closures, liners, and secondary cartons. For specification matching, samples, MOQ, lead time, and global logistics, Contact Us.
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