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Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong Featured Image
  • Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong
  • Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong

Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong

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That has a positive and progressive attitude to customer's interest, our organization consistently improves our products quality to satisfy the demands of shoppers and further focuses on safety, reliability, environmental specifications, and innovation of 8"Rubber Surround Repair Kit , 7"Rubber Surround Repair Kit , Concave Cap , And there are also a lot of overseas close friends who came for sight seeing, or entrust us to buy other stuff for them. You will be most welcome to come to China, to our city and to our manufacturing facility!
Massive Selection for 15Edge 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:

Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong detail pictures

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Our well-equipped facilities and excellent excellent management throughout all stages of creation enables us to guarantee total buyer satisfaction for Massive Selection for 15Edge Folded Ring Surround Repair Kit - NBR Rubber surround used on loudspeaker – Nandi Yanlong , The product will supply to all over the world, such as: Georgia, Serbia, Angola, Look forward to the future, we will focus more on the brand building and promotion . And in the process of our brand global strategic layout we welcome more and more partners join us, work together with us based on mutual benefit. Let's develop market by fully utilizing our comprehensive advantages and strive for building.
    • We are long-term partners, there is no disappointment every time, we hope to maintain this friendship later!
    5 Stars By Eric from Lyon - 2018.11.06 10:04
    As an international trading company, we have numerous partners, but about your company, I just want to say, you are really good, wide range, good quality, reasonable prices, warm and thoughtful service, advanced technology and equipment and workers have professional training, feedback and product update is timely, in short, this is a very pleasant cooperation, and we look forward to the next cooperation!
    5 Stars By Emma from Las Vegas - 2017.12.31 14:53
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