In-house sheet production
PP and PS share a sheet production line. Sheet requirements are reviewed with tray geometry and forming conditions.
LONGGANG · WENZHOU · ZHEJIANG
Integrated PET / PP / PS sheet production and thermoforming
Tonghou Packaging is based in Longgang, Wenzhou, Zhejiang. We produce PET, PP and PS sheet, thermoformed packaging and flocked inserts. Material, sheet, geometry, tooling and forming conditions are reviewed together for custom food, electronics, industrial and presentation packaging.
Wenzhou Tonghou Plastic Products Co., Ltd.
Page updated
Four confirmed manufacturing facts
Integrated pressure/vacuum forming
Combining pressure/vacuum forming, in-line cutting and automatic stacking.
High-speed thermoforming
The forming route is selected around material, geometry and order requirements.
Sheet and packaging production
Flocked inserts for cosmetics, liquor and health-product presentation boxes.
The company owner confirmed this configuration on 4 September 2026. Equipment counts describe the current setup; forming range, output, precision and delivery arrangements are confirmed for each project.
Factory, storage and rooftop photovoltaic space
Production, storage and the rooftop photovoltaic project occupy areas with distinct uses. The company owner confirmed the following areas on 7 September 2026.
Original factory premises
The original factory premises cover 1,911 square metres.
Warehouse in the added factory premises
Building 6, fourth floor, in the added factory premises; used for storage.
PET sheet production area
Located on the ground floor and used for PET sheet production.
Rooftop photovoltaic project
A rooftop photovoltaic project, with its area listed separately from indoor production and storage space.
01 / SHEET PRODUCTION
PET, PP and PS: match the sheet to the tray requirements
Tonghou produces PET, PP and PS sheet in-house. PP and PS share a sheet production line. Custom tray assessment starts with the application, contact conditions, appearance and geometry, then considers sheet and forming options. A material name does not replace finished-product validation.
PET trays and transparent packaging
For transparent packaging, review sheet and geometry against product visibility, display space and positioning contours.
- Sample review priorities
- Appearance, surface contact, cavity fit, sidewalls and edge condition.
PP trays and food inserts
For PP food and mooncake trays, assess cavity depth, opening, corners and sheet conditions together when deep cavities are required.
- Sample review priorities
- Loading, compartments, stacking, denesting, box fit and actual use conditions.
PS trays and electronics inserts
For electronics and industrial parts, review cavity layout, part orientation, clearance around sensitive areas and handling requirements.
- Sample review priorities
- Contact points, rigidity and removal; antistatic projects require agreed testing and acceptance criteria.
See sheet production on site
PET sheet production
Company-supplied footage of PET sheet production. Sheet requirements are assessed with appearance, product geometry and the subsequent forming conditions.
Shared PP / PS sheet production line
This sheet line is used for both PP and PS. The material and sheet requirements for an order are confirmed during the product and forming-route assessment.
02 / PRESSURE / VACUUM FORMING
Pressure/vacuum forming: assess the geometry first
The current setup includes 3 integrated pressure/vacuum forming machines with in-line cutting and automatic stacking. Deep cavities, irregular profiles and retention features are reviewed together with sheet, heating, tooling and the forming route.
- Deep cavities and draws: review the relationship between the opening, depth, sidewalls and corners.
- Complex profiles and retention: confirm contact points, removal space and assembly method.
- Wall distribution and corners: inspect the sidewalls, base and corner formation on samples.
The choice of pressure/vacuum forming depends on the material, thickness, draw geometry and sample review.
03 / HIGH-SPEED THERMOFORMING
High-speed thermoforming for approved tray structures
Five high-speed thermoforming machines complement the pressure/vacuum forming equipment. Once the material, structure and sample are approved, production planning considers cutting, stacking, inspection and packaging requirements.
- Confirm the sample, drawing revision and material requirements.
- Check cavities, cut edges, stacking and denesting.
- Agree inspection, packing, identification and delivery arrangements for the order.
The equipment category does not establish a particular production speed or capacity.
04 / FLOCKED PACKAGING
Flocked inserts: review support and presentation together
Tonghou produces flocked sheet and flocked packaging, including inserts for cosmetics, liquor and health-product presentation boxes. Custom assessment considers cavity support, surface feel, visible areas and box assembly together.
- Set support and removal points around the bottle, accessories and box space.
- Approve color, flock feel, surface contact and edges using physical samples.
- Include abrasion, fiber shedding and odor requirements in the sample review and acceptance criteria.
Flocked-sheet winding
Company-supplied footage of flocked sheet being wound. Physical samples can be used to confirm flock color, surface feel and subsequent forming requirements for a custom insert.
05 / PRODUCT APPLICATIONS
Connect manufacturing conditions to the packaging application
These are company-confirmed product directions. Follow the relevant page for geometry and acceptance considerations, or send the product, drawings and packaging requirements for assessment.
Food and mooncake inserts
PP trays assessed for cavities, separation, handling, stacking and outer-box space.
View product and review criteriaElectronics and industrial trays
PS electronics inserts and industrial packaging assessed for positioning, clearance and handling.
View product and review criteriaTransparent packaging
PET trays and transparent packaging assessed for visibility, surfaces and formed contours.
View product and review criteriaFlocked presentation inserts
Flocked inserts assessed for support, touch, display and presentation-box assembly.
View product and review criteriaDeep and irregular cavity assessment
Review sheet, cavity depth, opening and corners together to assess the forming route.
View product and review criteriaRetention and positioning assessment
Review contact points, restraint, removal space and assembly on samples; precision is confirmed by project.
View product and review criteriaGeometry shown by existing products
These images are based on company-supplied, publication-approved product photos. Backgrounds cleaned for display; confirm details against physical samples. The images illustrate cavities, contours and edges; material and performance depend on the relevant product records.
Multi-cavity positioning
Visible evidence: separated cavities, formed contours and a perimeter flange.
Shaped bottle support
Visible evidence: bottle-profile geometry, a defined neck area and a textured presentation surface.
Compartment and rim geometry
Visible evidence: four divided cavities, formed sidewalls and a continuous outer rim.
06 / SHEET + FORMING INTEGRATION
Why consider sheet production and forming together?
When comparing a thermoformed tray manufacturer in Wenzhou or Longgang, look at how material decisions connect to forming as well as the sample appearance. Tonghou's integrated sheet and forming setup brings the assessment back to one set of product requirements.
Start with the finished requirement
Translate appearance, structural support, contact conditions and packaging assembly into sheet and forming review inputs.
Trace issues across the process
When a wall, corner or retention issue appears, review sheet, heating, tooling and forming conditions together.
Carry one approved revision forward
Connect the agreed material, geometry, sample and acceptance criteria so each stage works to the same requirements.
07 / SAMPLE TO PRODUCTION
From sample to production, with clear inputs at each stage
Define the project conditions and approval points before arranging tooling, samples and production. Sampling and delivery timing are confirmed after project assessment.
- 01
Provide a product or drawing
Share dimensions, weight, application, packaging space, quantity requirements and areas needing protection.
- 02
Match material and geometry
Review PET / PP / PS or flocking options, thickness needs, cavities, removal and forming route.
- 03
Agree tooling and sampling inputs
Review cavities, corners, release and cutting locations, and define what the sample needs to establish.
- 04
Review physical samples
Check product fit, retention, sidewalls, edges, appearance, stacking and outer-box assembly.
- 05
Agree production and acceptance
Record the sample and drawing revision, inspection method, packaging, identification and delivery conditions.
RFQ / PROJECT ASSESSMENT
Turn your product requirements into an assessable RFQ
Send product photos or drawings with the application, preferred material, dimensions, quantity, packaging method and acceptance criteria. These inputs guide the sheet, forming-route and next-step assessment.