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Sheet Moulding Compound

Sheet moulding compound (SMC) or sheet moulding composite is a ready to mould glass-fibre reinforced polyester material primarily used in compression moulding.
  • RAL 7035

  • JLON

  • 145±5

  • 3921909090

  • Fiberglass

  • Polyester Resin/Vinyl Ester Resin

  • 600-100MPa

Availability:
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Video of Sheet Moulding Compound

Introduction of Sheet Moulding Compound



Sheet moulding compound (SMC) or sheet moulding composite is a ready to mould glass-fibre reinforced polyester material primarily used in compression moulding. Alternatively the resin and related materials may be mixed on site when a producer wants greater control over the chemistry and filler.

Sheet moulding compound (SMC) is manufactured by dispersing long strands (usually >1") of chopped fiber (commonly glass fibers or carbon fibers on a bath of thermoset resin (commonly polyester resin, vinyl ester or epoxy resin)). The longer fibers in SMC result in better strength properties than standard bulk moulding compound (BMC) products. Also we provide long and continuous fiber or woven roving for extra reinforcement.

SMC is usually sold in rolls and then cut into smaller pieces called "loads." In a process called compression moulding, heat and pressure are applied to the charge to create a wide range of products from simple designs to complex components.



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Process of Sheet Moulding Compound



The slurry reservoir dispenses a dosed amount of the specified resin slurry onto a plastic carrier film. The carrier film passes through a chopper, which cuts fibres into the surface. Once these fibres have drifted through the depth of the resin paste, another layer is added on top to sandwich the glass. These sheets are compacted and loaded into a winder for storing the product as it matures. The carrier film is then removed and the material is cut into various shapes. The shape of the charge and the mould are determined according to the desired shape and the charge is then added to the mould. Heat and pressure are applied to the charge and once fully cured, the charge is removed from the mould and becomes the finished product. Fillers can both reduce weight, change physical properties and often increase strength. Challenges in the production process include wetting the filler, which can consist of glass microspheres or neatly aligned fibres rather than randomly chopped fibres; adjusting the mould temperature and pressure to provide the right geometry; and adjusting the chemistry to suit the end use.


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Application of Sheet Moulding Compound




Electrical applications, corrosion resistant needs, structural components at low cost, automotive, sanitary, transit.

General Purpose:Non-electric products such as chair, water tank.

Heat and Corrosion Resistant:Composite materials intended for use in sanitary, such as shower base, bath tub, walls.

Electric:Satisfy different flame ratings such as UL94 HB, UL94 V0. High strength, UV stability. Suitable to make electric parts used indoor or outside.

High Strength & A Grade Surface:High strength, good tenacity, A grade surface. Suitable to make door skin and auto parts such as bumper, panel, truck high roof.

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Features of Sheet Moulding Compound



High mechanical strength

Low shrink

Low density

Dimensional stability

Corrosion resistance

Fire resistance



Advantage of Sheet Moulding Compound



The most important and frequently cited advantage of sheet moulding compound is its low weight compared to other substances, including metal and even other polyesters such as block moulding compound (BMC). As a result, SMC has replaced metal parts as the primary material for many automotive components. It is also used in the manufacture of bathtubs, hydrotherapy pools and seating for arenas, cinemas and stadiums.

In addition to being lightweight, SMC is easy to manufacture and can be produced in large quantities. Combined with the simplicity of the compression moulding process and the short production cycle, parts made from SMC can also be mass-produced in a very short period of time.

However, the lightweight nature of SMC does not mean that strength must be sacrificed. It is robust and can withstand impacts even at high speeds. The compound is even approved for use in the housings of passenger cars, where it regularly scores highly in crash tests.

Finally, sheet moulding compound is an extremely economical option. Manufacturers can save money on all aspects of the production process, from minimal labour costs to reduced waste. In addition, SMC is very time efficient - it can be primed in-mould rather than waiting until the end of the moulding process. However, a post-mould painting process is required to achieve a Class A finish.

The introduction of SMC can justifiably be seen as a revolution in parts manufacturing, heralding a shift from metal to polymer. Today, SMC remains a reliable option with many attractive benefits.


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Technical specifications of Sheet Moulding Compound


Type

Application

General Purpose

Non-electric products such as chair, water tank

Heat and Corrosion Resistant

Composite materials intended for use in sanitary, such as shower base, bath tub, walls

Electric

Satisfy different flame ratings such as UL94 HB, UL94 V0. High strength, UV stability. Suitable to make electric parts used indoor or outside

High Strength & A Grade Surface

High strength, good tenacity, A grade surface. Suitable to make door skin and auto parts such as bumper, panel, truck high roof


Packaging and Storage of Sheet Moulding Compound

  • SMC should be sealed and packed in aluminium-plated film and stored in a cool and ventilated place below 25°C.

  • Sheet storage period is A maximum of 45 days from the date of manufacture.

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Company profile


Changzhou JLON Composite Co., Ltd.

A company who believes a satisfied customer is the best business accomplishment.

Changzhou JLON Composite Co. provides a wide range of reinforcements tailored to many applications such as construction, marine, pultruded profiles, transportation, wind energy, sports, etc. We’re one stop source for FRP raw materials.

In recent years we’ve entered new business axial fan and PVB/SGP film. Now there’re mainly two business sectors in our company:

A. Composite reinforcement materials and building materials:

  1. Fiberglass products such as roving, chopped strand mat, woven roving, stitch mat, multiaxials, infusion mat, nonwovens for roofing, flooring, ceiling and walls of buildings

  2. High performance fiber such as carbon fiber, aramid fiber, basalt fiber, high silica fiberglass, quartz

  3. Core materials such as PVC/PET foam, PP honeycomb

  4. Chemicals such as UP resin, vinyl ester resin, epoxy resin, SMC/BMC, MDI

  5. Auxiliary materials such as infusion consumables, FRP tools

B. Axial fan:

We provide PAG and aluminum axial fan for HVAC, engineering equipment...We have different blades, hubs to satisfy customers’ specific needs.

FAQs of Sheet Moulding Compound

Q1.Can your company customize products?

A: Yes, We usually discuss with customers and help them find solutions.


Q2. How can I get a sample from you to check quality?

A: Usually a sample will be prepared within one week after specification agreed.


Q3. What about your delivery time? Can we receive our goods on time?

A: Usually around 2-3 weeks after order confirmed. Exact delivery time depends on order quantity and Off-season/ busy season.


Q4. What is the Guarantee to buy your products? How to resolve quality complaints?

A: Offer TDS of each lot of production for confirmation before delivery.Once you have any quality problem, you can provide samples /pictures and test data. We will give you feedback in short time. If the quality problem confirmed, we will discuss about compensation with you.


Q5.What are your terms of payment?

A: Usually we do EXW, FOB, CIF and DDU


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