1. Characteristics of E glass fiber SMC roving

E glass fiber SMC roving is a reinforced glass fiber developed specifically for hot compression molding process. It has good bundling, cutting and resin impregnation, and is widely used in reinforced products of sheet molding compounds. The core characteristics are as follows:

Good impregnation: The fiber surface is treated with a special impregnation agent and is firmly combined with unsaturated resins, vinyl, epoxy and other systems.

Excellent mechanical properties: The molded products have excellent tensile strength, flexural strength and impact toughness.

Neat cutting and good beam splitting: It is convenient to achieve efficient automatic cutting and uniform plying in the SMC machine.

High temperature resistance and corrosion resistance: It is suitable for use in a variety of complex environments.

2. Advantages of E glass fiber SMC roving

Strong resin compatibility: It is suitable for a variety of thermosetting resin systems to ensure efficient compounding.

High efficiency and low loss: The reinforcing fiber has high stability, uniform plying and small corner loss.

Good performance consistency: The package weight is stable and the length is uniform, which is suitable for continuous industrial production.

Environmental protection and safety: does not contain asbestos, heavy metals and other harmful substances, in line with industry standards.

3. Typical application scenarios

Automotive industry: bumpers, engine hoods, door panels and other structural parts.

Power equipment: cable trough boxes, meter boxes, switch housings and other insulating products.

Construction field: light and high-strength materials such as water tanks, sanitary ware, decorative panels, etc.

Rail transportation and shipbuilding: used for lightweight, corrosion-resistant component molding.

4. Purchase and use guide

Key parameter reference:

Line density: Common models are 2400tex and 4800tex, which can be matched according to SMC equipment and customer requirements.

Sizing agent type: Match the model according to the target resin system.

Usage suggestions:

The storage environment should be kept dry and ventilated, avoiding direct sunlight and moisture.

5. FAQ

What is the difference between SMC roving and spray up roving?

Many customers get confused when they first select materials. In fact, the two have completely different uses:

SMC roving is a continuous bundle of glass fibers, used to prepare SMC sheets, suitable for high-strength composite materials such as automobile shells and electrical appliance covers;

Spray up roving is in a chopped state and sprayed with a spray gun and resin. It is commonly used in large storage tanks, yacht shells and other irregular structures for rapid prototyping.

What is the difference between SMC and FRP? 

FRP is a large category, which generally refers to materials made of glass fiber, carbon fiber and other reinforcing materials and resin. SMC is a molding method and material form of FRP.

Different process: SMC is a sheet made by mixing chopped glass fibers with unsaturated resins and molding them by compression molding; while FRP can be made by hand lay-up, winding, RTM, spraying, pultrusion and other processes.

Different applications: SMC is mainly used for large-volume standard parts such as automotive parts, electrical housings, and sanitary products; FRP covers a wider range of fields such as wind turbine blades, chemical pipelines, and ships.

How to judge the quality of a roll of SMC roving?

Check whether the line density is uniform and whether it suddenly becomes thicker or thinner;

Touch the bundle, a good glass fiber bundle is easy to spread out and will not stick together;

Check whether there is cracking, flying catkins, or burrs;

It is best to ask the manufacturer to provide a recent factory inspection report, including indicators such as the sizing agent content and breaking strength.

6. Summary 

E glass fiber SMC roving is widely used in automobiles, construction, power and other fields with its good mechanical properties, excellent molding efficiency and highly adaptable processing performance. Reasonable selection and standardized storage and transportation will help improve the quality of the final product and is an ideal choice for SMC composite material reinforcement.

If you are looking for high-quality SMC roving, the best-selling products in China are Taishan T959, JUSHI SMC440, CYS-E326, etc. For more information or to obtain our SMC  product information, please contact us via email annayu@169chem.net or call 18909016373. WhatsApp: +86 18909016373.