Shijiazhuang Richway Rubber Technology Co., Ltd is a manufacturer of RV revived rubber, which is produced by recycling waste rubber materials. RV revived rubber can be mixed with raw rubber compounds at a ratio of up to 90% RV rubber to improve properties like tensile strength, rolling resistance, and productivity. The document provides details on the application and characteristics of RV revived rubber in tires and other rubber products, as well as factors that influence the properties of RV revived rubber, such as the type and particle size of waste rubber used.

1. SHIJIAZHUANG RICHWAY RUBBER TECHNOLOGY CO., LTD
Marketing HQ: No.1-322 Shengbo Office Building, No.199 Tiyu North Str.SJZ.
Tel: +86-311-86823617
Fax: +86-311-85363799
Web：www.richway-rubber.com
Email: rvtech@richway-rubber.com
Application & Characteristics
of RV Revived Rubber
Mixing method of RV revived rubber and raw compound rubber
First add RV revived rubber for mill running on the open mill, and add raw compound rubber, mix, sheet evenly,
and vulcanize.
As for the property conservation rate of RV revived rubber, it has close relation with the types of the waste rubber.
If calculated only in the tensile strength, RV revived rubber can keep 50%-85% of the tensile strength of the crude
rubber.
Characteristics of RV revived rubber
1. With increased anti-recovery, low permanent deformation and compression, high rebound elasticity and low
rolling resistance, it can shorten the mixing time, reduce the temperature of mixing, rolling and extrusion,
improve the tackiness of the semi-finished products and the intensity of the rubber compound, and reduce the
extrusion expansion and contraction.
2. RV revived rubber is safe in processing with anti-scorch function, and prolongs the scorching time after
plastifing below 100℃.
3. Adding RV revived rubber can shorten the vulcanizing time, and is helpful to increase the productivity.
RV revived rubber can be mixed with additives like common rubber, and can save accelerator and vulcanizing
agent of the raw compound rubber, which cost a lot. For instance, if the raw compound rubber: RV revived
rubber =60:40, the accelerator and sulfur added into the raw compound rubber of 60 parts by weight decreases
by 1/4 respectively. Hopefully, the factory can determine the dosage according to the actual situation.
4. RV revived rubber has the anti over cure property, which has special meanings for tire molding and
retreading, as the existence of RV revived rubber cuts down the danger of over cure or reviving.
5. Application in thermoplastic elastomer: NR/PP+RV revived rubber of 50%; the tensile strength can be
increased from 6Mpa to 12Mpa.
The test shows that after 150℃×15min vulcanizing, 100% RV revived rubber can make the rubber chain
scission and reclaimed again without adding RV rubber reclaiming agent with the tensile strength almost
unchanged compared with the RVR revived rubber vulcanized for the first time, which makes us believe that
RV rubber reclaiming agent shows the actual scene of the factory without waste rubber.
Considering the properties and costs of the products, it is undesirable to use 100% RV revived rubber. We
recommend you to use 90% RV revived rubber to replace raw compound rubber.

2. SHIJIAZHUANG RICHWAY RUBBER TECHNOLOGY CO., LTD
Marketing HQ: No.1-322 Shengbo Office Building, No.199 Tiyu North Str.SJZ.
Tel: +86-311-86823617
Fax: +86-311-85363799
Web：www.richway-rubber.com
Email: rvtech@richway-rubber.com
6. Purpose of RV revived rubber produced by tire rubber powder: Can be applicable to small motorcycle tires,
solid tires, retreading tires and truck tires, and OTR tire parts; shoe soles and heels (mold pressing and injection
mold), mixing of thermoplastic rubber (TPRS), injection molding products, ebonite rubber, toys and a large
amount of other common rubber products.
RV revived rubber can be applicable to all fields including the tire field. As is known to all, 5-10% of tire rubber
powder can be used for tires. If the RV revived rubber is used, the application proportion can be highly
increased, especially in the cross-country tires.
Storage Period of RV revived rubber
If the RV revived rubber is disposed properly, which means, it has been cooled to the environment temperature
before storage, it can be stored for more than 6 months. When storing, the Mooney viscosity of the rubber may
increase a little, but will decrease to the original level or even lower (subject to the rubber refining condition) when
mixing on the open mill again; if RV revived rubber got scorching partially, it is easy to recover by mixing three
times (without adding any additives) on the rubber fining mixer.
Other Applications of RV Revived Rubber
1. Interface problems in the mixing of different types of rubber can be settled
EPDM waste disposed by RV and added with NR (RV-EPDM revived rubber + NR) can greatly increase the
weather resistance of the products, which are not easy to bloom or fade. The interface problems in the mixing of
different types of rubber are decreases, and the property is increased.
EPDM waste disposed by RV and added with NBR (RV-EPDM revived rubber + NBR) can greatly increase the
weather resistance and oil resistance of the products, which are not easy to bloom or fade. The interface problems in
the mixing of different types of rubber are decreases, and the property is increased.
EPDM and RV-IIR rubber waste disposed by RV and added with NR (RV-EPDM revived rubber and RV-IIR
revived rubber + NR) can greatly increase the weather resistance, oil resistance and air tightness of the products,
which are not easy to bloom.
2. RV revived rubber can be used for producing thermoplastic elastomer.
3. RV revived rubber can be used as the cross-linking agent of plastics (PVC) and rubber.
4. RV revived rubber can toughen the waste polypropylene PP/waste tire rubber powder composite materials,
increase the impact strength and tensile strength of the composite materials, and enhance the compatibility.

3. SHIJIAZHUANG RICHWAY RUBBER TECHNOLOGY CO., LTD
Marketing HQ: No.1-322 Shengbo Office Building, No.199 Tiyu North Str.SJZ.
Tel: +86-311-86823617
Fax: +86-311-85363799
Web：www.richway-rubber.com
Email: rvtech@richway-rubber.com
Factors Influencing the Properties of RV Revived Rubber:
1. RV revived rubber produced by rubber powder of 40 meshes:
1) Particle diameter size of the rubber powder: The smaller the particle diameter, the better the property, the better
the RVR extension, the lower the Mooney viscosity.
2) Particle diameter distribution of rubber powder: The evener the distribution of the particle diameter, the better.
3) Superficial area size of the rubber powder: The bigger than the superficial area, the better.
4) Specific surface activity of the rubber powder: The bigger the activity, the better.
5) Addition volume of RV rubber reclaiming agent: General dosage is 2-4, and can be adjusted according to the
rubber content of the waste rubber.
2. RV revived rubber produced by waster rubber leftovers:
1) Rubber content of waste rubber leftovers: The higher the content, the better the property.
2) Filler content of waste rubber leftovers: The higher the content, the poorer the property.
3) Addition volume of RV rubber reclaiming agent: General dosage is 2-4, and can be adjusted according to the
rubber content of the waste rubber.
4) Scattered evenness of RV rubber reclaiming agent: The evener it scattered, the better.
5) Compatibility of RV rubber reclaiming agent and waste rubber leftovers: The higher the compatibility, the better.
6) Sulfur content of waste rubber leftovers: The higher the sulfur content, the easier to revive, the better the
property.
3. Influences of processing factors:
1) Selection of processing machine: The refining mill is the best.
2) The roll pitch control of the open mill: The smaller, the better.
3) Temperature control while processing: 40-60℃ is the most suitable.
4) Processing time: Evenly mix the materials, not for too long or too short. The users can adjust according to the
waste rubber. Generally, 15 minutes is ideal for open mill, and 10 minutes for refining mill.
5) Revolution ratio of the open mill and the revolution speed of the internal mixer: The bigger the revolution ratio
of the open mill, the better the RVR effect; it is better when the revolution speed of the internal mixer is 40 rpm.
Contact:
Tina G
Tel: +86-311-86823617 Fax: +86-311-85363799
Mob：+86-13930145588
Http://www.richway-rubber.com
Email：Richway.rubber@gmail.com