征鸿诺瓦医疗科技

Z&H NOVA TECH

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About Us

Zhenghong Nova Medical Technology (Shenzhen) Co., Ltd. was founded by a team of PhDs from the National University of Singapore and seasoned industry experts. The company has established three major product lines:

•FreshShield sulphur dioxide generating pad;

•Edible coatings for citrus, avocados and more; 

•Paclife modified atmosphere packaging (MAP)case   •liner and pallet shroud

The core team brings over 30 years of experience in medical coatings and fruit edible coatings. The company has been designated as National High-Tech Enterprise, holds over 10 core patents, has published more than 100 academic papers, and has obtained ISO 13485 and ISO 10993 quality certifications.


We provide one-stop post-harvest solutions

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FreshShield® Laminated Sulphur
Dioxide Generati

  • • Eliminate Botrytis cinerea over 24 to 48 hours

    • Extend the storage and shelf life of blueberries to 6-7 weeks

  • • Precise SO2 release tailored for blueberries to prevent possible bleaching on sensitive varieties

  • • Safe to use with minimum sulphite residues (< 9 ppm)

    Fulfill requirements of EU 

  • • Easy to use 

    • Seamless integration to current operation

How It Works
How It Works

FreshShield® Dual Release Sulphur  Pad features a proprietary five-layer sandwich structure

• The fast-release phase disinfects the surface of blueberries by a quick release of high concentration of SO₂ 

• The slow-release phase maintains a continuous, low-level release of SO₂ over 30 days to inhibit spore germination

• The pad activates automatically when relative 

humidity reaches 70% RH

Product Design
Product Design

Special designed for blueberries to prevent fungal decay (especially Botrytis cinerea)

Patented technology to ensure stable, predictable and uniform SO2 release, minimizing bleaching

A serials of products with tailored release profile matching fruit physiology and logistic conditions

Product Range
Fast Release Pad for Blueberries
Dual Release Pad for Blueberries
Product Feature
Fast release within 24-48 hours
For fast disinfection of molds

Dual release: Fast release

within 24-48 hours for fast

disinfection of mold Slow release over 30 days for inhibition of spores


When to Apply It
5-7 days cold storage
+ 3 days shelf life for
domestic transportation

15-30days cold storage
+ 3-7 days shelf life for 

long term storage and export


Product Size
350*240 mm Pad
80*80 mm Card
Customization is
available upon request

350*240 mm Pad Customization is

available upon request


Product Efficacy


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How to Use
Fast release for short term storage (5-7 days)
Fast release for short term storage (5-7 days)
Dual release for long term storage (15-30 days)
FAQ
Q: How does the FreshShield SO₂ pad provide protection against fungal infections?
A: SO₂ is a typical food-grade antimicrobial agent. During fruit storage, it exerts strong fungicidal and growth-inhibitory effects on fungi, effectively reducing postharvest decay and softening in berries such as grapes and blueberries caused by Botrytis cinerea, Penicillium spp., Alternaria spp., and Fusarium spp.
Q: What is the best stage to use the FreshShield SO₂ pad?
A: The pad should be applied in the packing room after the pre-cooling. It is important to control the temperature difference between the pre-cooled blueberries and the packing room environment. Excessive temperature differences can cause condensation during packing, which increases the risk of mold infection and SO₂ injury.
Q: Should the FreshShield SO₂ pad be used together with absorbent paper?
A: Whether to use absorbent paper depends on the packaging format. When an case liner is used, it is recommended to include absorbent paper. The absorbent paper helps regulate humidity inside the bag, preventing excessive condensation that can lead to decay and SO₂ injury. When the FreshShield SO₂ pad is placed outside the PET clamshell and the entire pallet is wrapped with a tray cover, absorbent paper is not required.
Q: What is the difference between the Fast-release SO₂ Pad and the Dual-release SO₂ Pad?
A: The dual-release SO₂ Pad features a two-stage release profile: a fast-release layer (completing release within 24–48 hours) and a slow-release layer (providing effective release for up to 30 days). The fast-release pad has only a single fast-release stage.
Q: How should FreshShield SO₂ pads be stored?
A: Store FreshShield SO₂ pads in their original sealed bag and carton. Keep the storage temperature below 25°C, relative humidity below 70% RH, ensure a dry environment, and avoid direct sunlight.
Q: How should unused FreshShield SO₂ pads be stored?
A: Unused FreshShield SO₂ pads should be promptly returned to the sealed bag, and the zip seal should be tightly closed to prevent ambient moisture from activating the pad, which would cause the product to lose effectiveness.
Q: Is using FreshShield SO₂ pads compliant for domestic and export sales?
A: Yes. SO₂ is approved as a food additive for postharvest use on grapes and blueberries. In China, products are compliant for domestic sale as long as the Maximum Residue Limit (MRL) remains within 50 ppm. For most export markets, compliance is achieved when the MRL is kept within 10 or 9 ppm.

Z&H NOVA TECH

Contact Us

    T:186 6244 6259    
    186 6244 6259    
    139 2748 0785    
    E-mail:zhanghongfei@zhnova.com

Address: Level 17, Block D3, Nanshan
zhiyuan,
Shenzhen, China