Inner and Outer Bags for Flexible Hose

The inner and outer bags for flexible hose are supporting packaging/protective bags used in the production, storage, transportation, installation and idle protection of industrial hoses (such as hydraulic hoses, conveying hoses, food-grade hoses, chemical hoses, etc.). They are divided into inner bags (directly contacting the hose body) and outer bags (outer protective layer). The core function is to protect the hose from damage, contamination or aging, ensuring stable product performance. They are widely used in machinery, chemical, food, construction, logistics and other industries.

Core Functions and Values

1. Core Functions of Inner Bags (Direct Protection of Hose Body)

- Moisture and dust prevention: Isolates moisture, dust and impurities in the air, preventing dust and moisture from adhering to the inner/outer wall of the hose, which may cause aging or contamination of the conveyed medium during use (especially for food-grade and pharmaceutical-grade hoses).

- Scratch and abrasion resistance: Reduces friction between the hose and itself or other items during packaging and stacking, protecting the rubber layer, plastic layer or braided layer on the hose surface.

- Anti-blocking: Prevents rubber hoses, silicone hoses, etc. from sticking together due to temperature changes or long-term stacking, ensuring they can be used immediately after unboxing.

- Clean protection: Inner bags for food-grade and pharmaceutical-grade hoses must meet hygiene standards (such as GB 4806, FDA), preventing the hose from contacting contamination sources and ensuring the safety of the conveyed medium.

2. Core Functions of Outer Bags (Outer Reinforcement and Identification)

- Wear and pressure resistance: Withstands collision, extrusion and scratching by sharp objects during transportation and handling, protecting the inner bag and hose from external damage.

- Load-bearing protection: Adapts to the weight of the hose (especially large-diameter, long-length hoses), preventing the outer bag from breaking during stacking and causing the hose to scatter.

- Identification bearing: Printed with product information (such as hose model, specification, material, pressure rating, production date, manufacturer information), facilitating warehouse management, logistics tracking and user identification.

- Moisture and UV protection: Some outer bags have waterproof and UV-resistant functions, preventing material aging (such as rubber cracking, plastic embrittlement) caused by prolonged exposure to sunlight and rain during long-term storage.

Applicable Industries and Typical Scenarios

1. Machinery manufacturing industry: Factory packaging and warehouse protection of hydraulic hoses and pneumatic hoses, preventing joint rusting and hose wear.

2. Chemical industry: Protection of chemical medium conveying hoses (acid and alkali resistant, corrosion resistant hoses), preventing the hose from contacting contaminants or aging.

3. Food and pharmaceutical industry: Inner bag protection of food-grade conveying hoses (such as milk, beverage, pharmaceutical conveying hoses), ensuring hygiene compliance.

4. Construction industry: Outer bag packaging of high-pressure grouting hoses and concrete conveying hoses, resisting wear and collision during site handling.

5. Logistics and transportation industry: Batch transportation packaging of various hoses, ensuring product integrity during long-distance transportation and facilitating loading, unloading and stacking.

6. Idle protection scenarios: During equipment maintenance, hoses are wrapped with inner and outer bags for storage after disassembly, preventing dust and moisture ingress and extending service life.