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Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong Featured Image
  • Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong

Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong

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"Sincerity, Innovation, Rigorousness, and Efficiency" is the persistent conception of our company for the long-term to develop together with customers for mutual reciprocity and mutual benefit for 1"Foam Surround , 3"Foam Surround , 4"Speaker Cone , If needed, welcome to help make speak to with us by our web page or cellular phone consultation, we are going to be delighted to serve you.
Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong Detail:

Excellent oil resistance, good wear resistance, good heat resistance,strong adhesion

Application Car audio, Home audio, Subwoofer audio, Stage speakers, Wall speakers, Ceiling speakers, Outdoor speakers, Intelligent voice Bluetooth speakers, surround sound, artificial intelligence speakers, Self DIY audio design.
Material NBR with another more than 10 types of additives to adjust the performance of the rubber
Hardness 40~85°
Thickness 0.10mm-15mm,accept customized
Surface treatment Black light, Sanding, Biting lace, etc
Shape Round, Oval, Rectangle,Accept foreign molds ,Support customize molds
Edge design High pressure strip, Textured, Anti concave edge, Notching, Punching, etc
Color As requested by clients
Feature Anti-aging, Waterproof, Durable, Pliable
Certification ISO9001,IATF16949,ISO14001
Capacity 80000pcs/month

A surround’s quality has enormous impact on the frequency response of a loudspeaker. The shore hardness directly affects the frequency of the speaker. Rubber surrounds also endure a long lifetime, almost 20~30years.

A surround is part of the sub’s suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.

Nitrile -butadiene rubber (also known as NBR rubber) was developed during the 1930s. It is fabricated through the co-polymerization of acrylonitrile (ACN) (polar building block) and 1.3-butadine (nonpolar building block). It is the seal industry’s most widely used and economical elastomer. This is partly because it displays excellent resistance to petroleum-based oils, fuels, water, alcohols, silicone greases and hydraulic fluids. Nitrile has a temperature range of between -54 and +149 degrees Celsius and has a good balance of desirable properties like low compression set, high abrasion resistance and high tensile strength. 

  • Guangdong Nandi Yanlong Technology Co., Ltd.
  • Low temperature tensile test of rubber materials NBR
Lab Date： 2022.05.11-05.13 Lab Model：ND158-399
No. Model Lab Conditions Time Lab Temp Test result Test Diff
5 NBR65-2 1 Vulcanization conditions: 12H 23℃ Peak value Disp Str FO Peak value Disp Str FO
Suface Temp Mold Temp Time Pressure Cap 12H -40℃ 33.92 36.53 2.25 35 -0.05 +2.30 -0.01 +1
190/195℃ 170/175℃ 45S 8kg/C㎡ 65T 24H -40℃ 40.42 43.17 2.69 36 +6.50 +9.25 +0.44 +1
2 100 ° 2-hour twice vulcanization. 36H -40℃ 41.22 45.22 2.74 36 +0.80 +2.05 +0.05 0
3 Tension machine speed: A is 10 and B is 100 48H -40℃ 41.5 44.32 2.76 36 +0.28 -0.90 +0.02 0
4 Tension plate:45mm*10mm*0.5mm 96H -40℃ 36.8 40.07 2.45 36 -4.25 -4.25 -0.31 0
5 Lab temp: 25℃±2℃, humidity 65%±30% Avg 38.772 41.862 2.76 35.8 0.19 0.08 0.03 0.4
Tabulator：Liu Li Auditor： Aken Inspector：Vic Chiu
一、Note：
1.peak value:the biggest tension.
2.Strength：In the tensile test, the maximum tensile stress of the specimen until it breaks.
3.Displacement：Travel distance from static movement to fracture.

Payment method: Pay 30% for deposit,70% before shippment.

Accept US dollars, RMB, if other currencies, please consult before paying.

Term:EXW/FOB/CIF/CFR/DDP

Port: Shen Zhen/Guang Zhou/Ning Bo/Shang Hai

Production Lead Time: 1-1k, 2 days；1k-10k, 7days；above 10k，negotiated.

Package:Export Standard Unified Carton Packaging.

Small quantity is usually shipped by courier.

Bulk quantity ship by air , by sea,by railway

Special service: help find low freight and freight counter-offer

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To create extra value for customers is our enterprise philosophy; buyer growing is our working chase for Wholesale Rubber surrounds, Rubber products, Cone paper used on all kinds of speakers. President of our company, with whole staff, welcomes all buyers to visit our company and inspect. Let us cooperate hand in hand to make a good future.

Our growth depends on the superior equipment, exceptional talents and continuously strengthened technology forces for Wholesale products which will supply to all over the world. Upon today, we have customers from all over the world. The mission of our company is to provide the highest quality products with best price. We are looking forward to doing business with you!

Product detail pictures:

Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

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We also provide item sourcing and flight consolidation solutions. We have now our very own manufacturing facility and sourcing place of work. We could provide you with nearly every kind of merchandise associated to our merchandise variety for Reliable Supplier 21Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong , The product will supply to all over the world, such as: Algeria, San Diego, Yemen, Our products and solutions are sold to the Middle East, Southeast Asia, Africa, Europe, America and other regions, and are favorably appraised by clients. To benefit from our strong OEM/ODM capabilities and considerate services, be sure to contact us today. We will sincerely create and share success with all clients.
    • We are a small company that has just started, but we get the company leader's attention and gave us a lot of help. Hope we can make progress together!
    5 Stars By Gwendolyn from Norwegian - 2018.10.01 14:14
    We have been looking for a professional and responsible supplier, and now we find it.
    5 Stars By Alexia from Ghana - 2018.10.01 14:14
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