Core Value of Sealing Performance Assurance for Daily Washing Plastic Bottles

I. Material Selection: Foundation of Sealing Performance

The physical and chemical properties of raw materials directly determine the sealing effect of bottles. PE, PP and PET are three common materials for daily washing packaging, compatible with different liquid and paste washing products. They are also core material options for lotion bottles in bulk and pet plastic bottles wholesale.

II. Structural Design: Key to Sealing Performance

Integrated structural design of bottle body, bottle mouth and cap is the core solution to liquid leakage and air infiltration. Custom styles are developed targeting different washing products:

Bottle cap structure: Built-in thickened sealing gaskets improve fitting tightness and effectively avoid leakage during transportation, which is the standard configuration of all wholesale plastic bottles with caps 

Bottle mouth structure: Precise threads and flat sealing surfaces eliminate gaps when tightening caps. Strict dimensional control is implemented for spray bottles and pump bottles.

Bottle body structure: Even wall thickness design resists internal and external pressure to prevent deformation under extrusion or long-distance transportation.

Special styles are developed for segmented washing categories: wholesale lotion bottles with pump equipped with double-layer sealed pump heads are selected for cream and emulsion products; For water-based cleaning supplies, wholesale plastic spray bottles and bulk small spray bottles are equipped with locked sprayers and sealed bottle mouths to avoid water leakage after repeated use.

Structures are adjusted according to application modes like squeezing and spraying as well as liquid viscosity in the design phase to fully meet sealing requirements.

III. Molding Process: Guarantee of Sealing Performance

Mature molding processes can fully leverage the advantages of raw materials and structural design, and maintain consistent sealing quality of mass products, which is the core production strength of reliable empty bottle supplier. Injection molding:

Adjust temperature, pressure and molding cycle to produce accessories including caps and pump heads, ensuring flat sealing surfaces and perfect fit between accessories and bottle bodies.

Blow molding: Mainly used for hollow washing plastic bottles such as lotion bottles and shampoo bottles. Precise mold and air pressure control guarantee round bottle mouths and uniform bottle wall thickness.

Thermoforming: Applied to produce thin portable washing sub-bottles. High-precision molds deliver stable sealing performance for small-capacity sub-packaging containers. Unified process standards are implemented across the whole production line to ensure identical sealing performance of every empty bottle in large batches of plastic bottles supplies.

A complete testing procedure is carried out before delivery to verify all wholesale empty plastic bottles meet sealing standards:

Sealing test: Pressure test, vacuum test and immersion test simulate extrusion, high and low temperature storage during transportation to check liquid leakage.

Physical property test: Sampling tests including cap torque, bottle mouth dimension and wall thickness inspection ensure good matching of all accessories.

Chemical stability test: Compatibility test between bottle materials and washing liquid avoids sealing failure triggered by chemical reactions. Defects are identified and optimized in advance during testing to make all wholesale empty bottles comply with sealing standards of daily chemical industry.