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Rifeng® P

Rifeng® P is PVC sandwich structural foam cores. With closed-cell, cross-linked rigid foam with excellent rigidity and a great stiffness to weight ratio.
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Rifeng® P is a universal PVC structural foam.


The Rifeng® P is a closed cell, cross-linked polymer foam that combines excellent stiffness and strength to weight ratios with superior toughness.


It is non-friable, contains no CFC’s, has negligible water absorption, and provides an excellent resistance to chemicals. The fine cell structure offers an excellent bonding surface.


Compatible with most resins and manufacturing processes Rifeng® P is ideally suited as a core material for a wide variety of sandwich structures subjected to both static and dynamic loads. Thanks to its unique lightness, Rifeng® P is the material of choice for applications where lightweight is a priority.

 

Characteristics

◆  Outstanding strength and stiffness to weight ratios

◆  Good impact strength

◆  Low resin absorption

◆  High fatigue resistance

◆  Good fire performance (self-extinguishing)

◆  High sound and thermal insulation

◆  Good styrene resistance

◆  The processing temperture ranges from -240℃ to +100℃, the long term operation temperature ranges from -240℃ to +80℃

 

Processing

◆  Contact molding (hand/spray)

◆  Vacuum infusion

◆  Resin injection (RTM)

◆  Adhesive bonding

◆  Pre-preg processing

◆  Thermoforming


Mechanical Properties

Property

Test Method

Unit

Value

P60

P80

P100

P130

P200

P250

Density

ISO 845

Kg/m3

Average

Typ. range

60

52~69

80

72~90

100

90~115

130

115~145

200

180~220

250

225~270

Compressive strength

ISO 844

MPa

Average

Minimum

0.95

0.75

1.40

1.15

1.95

1.70

3.10

2.40

5.15

4.55

6.75

5.45

Compressive modulus

ISO 844

MPa

Average

Minimum

70

60

105

80

140

115

180

150

280

225

360

300

Tensile strength

ASTM D638

MPa

Average

Minimum

1.30

1.00

2.00

1.80

2.50

2.20

4.10

3.00

6.35

5.50

7.65

5.65

Tensile modulus

ASTM D638

MPa

Average

Minimum

45

35

60

55

80

65

120

95

185

155

245

175

Shear strength

DIN 53294

MPa

Average

Minimum

0.85

0.65

1.25

1.00

1.65

1.40

2.30

2.00

3.60

3.20

4.55

3.75

Shear modulus

DIN 53294

MPa

Average

Minimum

20

17

30

25

40

35

58

45

80

70

100

80

Shear elongation at break

DIN 53294

%

Average

Minimum

18

10

20

13

23

15

28

20

30

20

30

20

 

Standard sheet

Length

mm

±5

2350

2160

2040

1880

1600

1500

Wideth

mm

±5

1120

1000

940

840

740

700

Thickness

mm

±0.5

5~70

3~65

3~60

3~50

3~40

3~40

●  Finishing Options, other dimensions and closer tolerances upon request

●  The data provided gives approximate values for the nominal density and DNV minimum values according to DNV type approval certificate.

●  The information contained herein is believed to be correct and to correspond to the latest state of scientific and technical knowledge. However, no warranty is made, either expressed or implied, regarding its accuracy or the results to be obtained from the use of such information. No statement is intended or should be construed as a recommendation to infringe any existing patent.


                                                                                                                                                                                                                                                      


Surface Finishing

Surface Finishing

Figure

Description

Molding process

Plain Foam

1561534736115960.jpg

After the sheets are sliced, no extra surface treatment. For the curved surface, it can be adapted by the thermoforming of the plain sheets.

Hand Lay-Up

Press Molding

Vacuum Bagging

Contoured Foam

1561534830793062.jpg

The foam is cut into small particles in length and width direction on one side. The glass fiber scrim is bonded on the other side.


It is used on the curved surface.

Suitable for curved surface

Perforated Foam

1561535035283199.jpg

Have the around 2mm diameter hole in the foam, the actual hole size can be adjusted based on the foam core thickness and the density.


With the hole, the air under the sheets can be expelled and the resin will be fluid to another side.

Hand Lay-Up

Press Molding

Vacuum Bagging

Grooved Foam

1561535056831355.jpg

The sheet surface is grooved as the resin infusion channel. The groove can be made on one side or both sides, in one direction or both directions.


With the resin infusion processing method, the groove will be used as the resin infusion channels, expel the air in the layup.

Hand Lay-Up

Press Molding

Vacuum Bagging

Grooved And Perforated Foam

1561535074282619.jpg

Based on the grooved surface finishing sheets, have the hole in the groove, the diameter is 2mm, the groove can be in the length direction or the width direction, the groove distance is 20mm.

Hand Lay-Up

Press Molding

Vacuum Bagging


▲  The developable surface means the surface can be developed in to a plain, such as the column surface. In such case, when using the double curved surface or the contour cut sheets, we only need to have the scored cut in one direction to be compatible with the curved surface.


▲  Hand layup is a very simple and easy-effective processing method, with single side tooling and room temperature curing epoxy resin, the reinforcement can be short chopped strand mat or oriented fiber glass, such as the un-twisted roving fabric. The properties of hand layup processing is one smooth surface finishing, can not monitor the part thickness, fiber content, void content and the finishing of backside, but the processing skills are relatively simple.

 

▲  Press molding processing method is to press molding in the closed tooling under heating. The properties of the press molding is that it needs both the male tooling and the female tooling, the finished parts have 2 smooth surface finishing and we can control the thickness, quality and fiber content accurately, but the processing cost is relatively higher.

 

▲  Resin infusion technology means one kind or some kinds of resin are infused into the close tooling cavity under the pressure. The required pressure can be applied with the vacuum (vacuum assisted resin infusion), gravity, the pump or the pressured tank. The most common vacuum assisted resin infusion system is using single side tooling, another side covered with the vacuum bag, vacuum assisted resin infusion.


                                                                                                                                                                                                                                                       

Marine

        ●   Hulls, decks, bulkheads, superstructures, interiors


Road and Rail

        ●  Roof panels, interiors, floors, doors, partition walls, side skirts, front-ends


Wind energy

        ●  Rotor blades, nacelles, turbine generator housings


Aircraft and Aerospace

        ●  Interiors, radomes, galley carts, general aviation (fuselage and wing)


Sports & Leisure Equipments

        ●  Skis, snowboards, surfboards, wakeboards, canoes, kayaks


Industrial

        ●  Tooling, tanks, ductwork, containers, covers


                                                                                                                                                                                                                                                       

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