JWT Rubber & Plastic Co.,Ltd

The production process and material composition of silicone rubber gives it a great amount of flexibility, which is what makes it so popular for so many uses. It’s able to withstand extreme fluctuations in temperature from as low as -60°C to as high as 300°C. It also has excellent environmental resistance from Ozone, UV and general weathering stresses making it ideal for outdoor sealing and protection to electrical components such as lighting and enclosures. Silicone sponge is a lightweight and versatile material making it ideal for reducing vibrations, stabilising joints and decreasing noise within mass transit applications – making it popular for use in environments such as trains and aircraft where customer comfort is helped by the use of silicone rubber. This is just a brief overview of the origins of silicone rubber. However, at Silicone Engineering we understand how important it is that you understand everything about the product you are buying. If you would like to find out...

Silicone rubber is a combination of an inorganic Si-O backbone, with organic functional groups attached.  The silicon-oxygen bond gives silicone its high temperature resistance and flexibility over a wide range of temperatures. The silicone polymer is mixed with reinforcing fillers and processing aids to form a stiff gum, which can then be crosslinked at elevated temperature using either peroxides or polyaddition curing.  Once crosslinked the silicone becomes a solid, elastomeric material. Here at Silicone Engineering, all our silicone materials are cured using heat which classifies our silicone products as HTV silicone or High Temperature Vulcanised. All our silicone grades are kitted, mixed and manufactured at our  55,000-sq. ft. facility in Blackburn, Lancashire . This means we have full traceability and accountability of the production process and can ensure the highest standards of quality management throughout. We currently process over 2000 tonnes of silicone ...

To grasp the multitude of ways silicone rubber can be used, it is important to realise its origins. In this blog, we take a look at where silicone comes from to understand more about its characteristics. To understand what silicone is you first need to know the different types of rubber available. In its purest form, natural rubber is more commonly recognised as latex and actually comes directly from a rubber tree. These trees were first discovered in South America and usage of the rubber from within them dates back to the Olmec culture. Anything which is not formed from this natural rubber is therefore man-made and is known as synthetic.A new substance made by mixing various materials together is called a synthetic polymer. If the polymer displays elastic properties, it is identified as an elastomer. Silicone is identified as a synthetic elastomer as it is a polymer which displays viscoelasticity – that is to say it shows both viscosity and elasticity. Colloquially people call t...

1. Check rubber objects regularly for hardening Slowly but surely, any rubber object, be it your car windshield wiper blades or the elastic waistband of your favorite pajama pants, will harden over time. Evidence of white or colored substances on the rubber can be one indication of a chemical reaction taking place. Natural rubber has poor resistance to both ozone and UV light, as well as to petroleum oils. Additionally, temperatures below -60°F (-51°C) or above 220°F (104°C) will degrade it quickly, while temperature extremes in general will facilitate degradation and hardening. Rubber stretches and flexes because it is made up of long, tangled molecule chains that can be straightened out under tension. Degradation of these molecular chains can occur from repeated or excessive tension (think of frayed or over-stretched rubber bands), or by exposure to elements like those noted above. 2.Examine the rubber for signs of damage Cracked rubber will remain cracked even when it’s ...

Your teacher hands you a graded essay. What do you look at first? Most college students turn their attention to the letter grade or percentage score. If it’s high, they are happy. If it’s low, they are disappointed. Many students end the review process at this point. What about you? If you want to write better essays, you will need to understand the criteria teachers use to score them. Development of Your Thesis A thesis is the essence of your paper—the claim you are making, the point you are trying to prove. All the other paragraphs in your essay will revolve around this one central idea. Your thesis statement consists of the one or two sentences of your introduction that explain what your position on the topic at hand is. Teachers will evaluate all your other paragraphs on how well they relate to this statement. To excel in this area, ask yourself these questions: Have I clearly introduced my thesis in the introductory paragraphs? Does the body of my essay support my ...

ODM and OEM are acronyms that are the buzzwords in the manufacturing sector. ODM stands for Original Design Manufacturer and OEM stands for Original Equipment Manufacturer. While many people confuse between the two terms and use them interchangeably, they are not quite the same. OEMs manufacture product based on design specification provided to them, while ODMs also design the product themselves before manufacturing them. Let’s understand the difference between the two in more detail by understanding them one by one. Both OEMs and ODMs aren’t limited to technology, consumer electronics or engineering sector, though they are more common in these sectors because products in these sectors are more design intensive. They are also present in other industries like fashion, footwear, personal grooming, etc One should always exercise caution when dealing with both OEMs and ODMs. In the case of OEM, providing them with secret product design and specs over which a company has invested hug...

ODMs or Original Design Manufacturers are companies which create new product designs and specifications based on the product idea brief provided by the client. In most cases, ODMs also manufacture the product they design and their clients get the products branded in their own name and sell it them in the market. Let’s say a company has a great idea for a “smart watch” that not only shows time but also acts as a health app measuring heart beat, blood circulation, etc. The company has done its research and knows it can market such a product. But they don’t really know how to design it or have the manufacturing capability to fabricate it. So they turn to an ODM which designs the actual product and manufactures it, to be eventually marketed by the client. ODMs generally provide  outsourced product development services , product manufacturing services, complete product life cycle services, etc based on their own capabilities. Our Contact Windows: Tel: 15395925023 (Paris.Dawson)...

OEMs are companies which manufacture products based on the product design and specifications provided by their client. The client does all the market research, R&D and develops its own product. But it does not have the manufacturing capability to fulfill the market demand in time, especially if its market is spread across the globe. So it turns to an OEM to do the manufacturing on its behalf. For example Apple spends millions of dollars on R&D and design and creates its own line of products, but gets the products manufactured by Foxconn. In this case Foxconn is an OEM (actually, world’s biggest OEM vendor). Foxconn doesn’t control the product design or it’s specs. They just manufacture them based on the details provided by Apple. Our Contact Windows: Tel: 15395925023 (Paris.Dawson) Email: sales2@jwtrubber.com (Business email box) Facebook: Paris.Dawson LinkedIn: Paris.Dawson Whatsapp: +86 15374032009(Welcome your message)

Today, our neighborly company visited us and we hold a meeting together. These person in this picture are all the sales dept. This meeting consists three steps: introduction; showing the PPT about SEO; Discussing some questions on how do better sales. They all have long time experience in international business seperately on silicone rubber product, barbecue  shelf and package material. Also, we are all belong the Xiamen 168 business group. this is an spomtaneous group,  we have the high enthusiasm on supply the better product and service for our custom,  not only because of the ambtion on internation business achievement, but also the most important  thing: the responsibility to make more convenient furture! If you have any questions, please connect with us without any hesitate. Our team and I are always here to support you! Our Contact Window: Tel: +86 153 9592 5023 (Paris.Dawson) Email: sales2@jwtrubber.com (Business email box) Facebook: Paris.Dawson...

• Silicone is one of the elastomers, or one of the rubbers. • The backbone of silicone contains silicon and oxygen, while the backbones of most of the other rubbers contain carbon-carbon bonds. • Silicone is more resistant to heat, chemical attacks, fungus attacks, UV and Ozone attacks than normal rubber. • Silicone is much better than all other rubbers for thermal insulation due to its heat resistance. • Silicone rubber offers special properties, which organic rubbers do not posses. Organic rubbers have poor tensile and tear properties at high temperatures while these properties are excellent in silicone rubbers at the same temperature conditions.

Both rubber and silicone are elastomers. They are polymeric materials that exhibit the viscoelastic behavior, which is generally called elasticity. Silicone can be distinguished from rubbers by the atomic structure. In addition, silicones have more special properties than normal rubbers. Rubbers are naturally occurring, or they can be synthesized. Based on this, silicone can be differentiated from rubber. Rubber Generally, all the elastomers are considered as rubbers in which dimensions can be changed largely by stressing, and can be returned to the original dimensions after removing the stress. These materials show a glass transition temperature due to their amorphous structure. There are many types of rubbers or elastomers like natural rubber, synthetic poly isoprene, styrene butadiene rubber, nitrile rubber, polychloprene, and silicone. But natural rubber is the rubber which comes to our mind when considering rubbers. Natural rubber is obtained from the latex of Heveabrasiliensi...

EPDM rubber  ( ethylene propylene diene monomer rubber ),  a type of  synthetic rubber , is an  elastomer  characterized by a wide range of applications. This is an M-Class rubber where the 'M' in M-Class refers to its classification in  ASTM  standard D-1418; the  M  class includes  rubbers  having a  saturated  chain of the  polyethylene  type. Dienes used in the manufacture of EPDM rubbers are  dicyclopentadiene  (DCPD),  ethylidene norbornene  (ENB), and vinyl norbornene (VNB). EPDM rubber is closely related to  ethylene propylene rubber :  ethylene propylene rubber  is a  copolymer  of  ethylene  and  propylene , whereas EPDM rubber is a  terpolymer  of  ethylene ,  propylene , and a  diene -component. The ethylene content is around 45% to 85%. The higher the ethylene content, the higher the loading possibilities of the p...

PMMA, commonly sold as  MDMA , see  para-Methoxy-N-methylamphetamine . For other uses, see  Acrylic (disambiguation) . Poly(methyl methacrylate)  ( PMMA ), also known as  acrylic  or  acrylic glass  as well as by the trade names  Crylux ,  Plexiglas ,  Acrylite ,  Lucite , and  Perspex  among several others (see below), is a transparent thermoplastic often used in sheet form as a lightweight or shatter-resistant alternative to glass. The same material can be used as a casting resin, in inks and coatings, and has many other uses. Although not a type of familiar silica-based glass, the substance, like many thermoplastics, is often technically classified as a type of glass (in that it is a non-crystalline vitreous substance) hence its occasional historical designation as  acrylic glass . Chemically, it is the synthetic polymer of methyl methacrylate. The materi...

Successful O-ring joint design requires a rigid mechanical mounting that applies a predictable deformation to the O-ring. This introduces a calculated mechanical stress at the O-ring contacting surfaces. As long as the pressure of the fluid being contained does not exceed the contact stress of the O-ring, leaking cannot occur. Fortunately, the pressure of the contained fluid transfers through the essentially incompressible O-ring material, and the contact stress rises with increasing pressure. For this reason, an O-ring can easily seal high pressure as long as it does not fail mechanically. The most common failure is extrusion through the mating parts. The seal is designed to have a point contact between the O-ring and sealing faces. This allows a high local stress, able to contain high pressure, without exceeding the yield stress of the O-ring body. The flexible nature of O-ring materials accommodates imperfections in the mounting parts. But it is still...

This article is about the mechanical seal. For other uses, see Oring.   Typical O-ring and application An  O-ring , also known as a  packing , or a  toric joint , is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. The O-ring may be used in static applications or in dynamic applications where there is relative motion between the parts and the O-ring. Dynamic examples include rotating pump shafts and hydraulic cylinder pistons. O-rings are one of the most common seals used in machine design because they are inexpensive, easy to make, reliable and have simple mounting requirements. They can seal tens of megapascals(thousands of psi) of pressure. History The first patent for the O-ring, is dated May 12, 189...

JWT's rubber standards are instrumental in specifying, testing, and assessing the physical, mechanical, and chemical properties of a wide variety of materials and products that are made of rubber and its elastomeric derivatives. Rubber, which can either be synthetically produced or derived from the milky colloidal suspension found in the sap of some plants, exhibits unique properties that render it extensively useful in many applications and products. These rubber standards allow rubber manufacturers and end-users to examine and evaluate their material or product of concern to ensure quality and acceptability towards safe utilization.

Other enclosure designs redirect the inward pressure outward, using it to supplement the forward sound wave. The most common way to do this is to build a small port into the speaker. In these bass reflex speakers, the backward motion of the diaphragm pushes sound waves out of the port, boosting the overall sound level. The main advantage of bass reflex enclosures is efficiency. The power moving the driver is used to emit two sound waves rather than one. The disadvantage is that there is no air pressure difference to spring the driver back into place, so the sound production is not as precise. Passive radiator enclosures are very similar to bass reflex units, but in passive radiator enclosures, the backward wave moves an additional, passive driver, instead of escaping out of the port. The passive driver is just like the main, active drivers except it doesn't have an electromagnet voice coil, and it isn't connected to the amplifier. It is moved only by the sound waves coming...

RTV Silicone  (Room-Temperature- Vulcanizing  silicone) is a type of  silicone rubber  made from a two-component system (base plus curative; A+B) available in a  hardness  range of very soft to medium--usually from 15 to 40  Shore  A. RTV silicones can be cured with a  catalyst  consisting of either  platinum  or a  tin  compound such as  dibutyltin dilaurate .   Applications include low-temperature  over-molding , making  molds  for reproducing, and  lens  applications for some optically clear grades.  Features: Good characteristics of easy operation Light viscosity and good flow-ability Low shrinkage Favorable tension No deformation Favorable hardness High-temperature resistance, acid and alkali resistance, and ageing resistance Advantages and disadvantages RTV silicone rubber has excellent release properties compared t...

Pure gum rubber , also known as natural rubber, is the elastomer that started it all. Made out of the coagulated latex produced from the Para rubber tree Hevea brasiliensis, natural rubber has been used as far back as 1600 BCE. The ancient Mesoamerican civilizations like the Olmecs, the Aztecs, and the Mayans used it as a ball for sports, and incredibly enough, natural rubber is still used to make balls for sports. In addition to sporting purposes,  natural rubber material  was also used as a currency in their societies. The Olmecs were the earliest recorded users of natural or “live rubber.” After all, the name “Olmec” literally translates to “rubber people”. There are 5  mechanical properties of natural rubber  that have transcended time. As word spread about the resilient and flexible elastomer, the material started being commercially grown and processed. The European nations quickly realized that pure gum rubber was ideal for many of their tasks and products...

Common plastics: This category includes both commodity plastics, or standard plastics, and engineering plastics. Polyamides (PA) or (nylons) – fibers, toothbrush bristles, tubing, fishing line and low-strength machine parts such as engine parts or gun frames Polycarbonate (PC) – compact discs, eyeglasses, riot shields, security windows, traffic lights and lenses Polyester (PES) – fibers and textiles Polyethylene (PE) – a wide range of inexpensive uses including supermarket bags and plastic bottles High-density polyethylene (HDPE) – detergent bottles, milk jugs and molded plastic cases Low-density polyethylene (LDPE) – outdoor furniture, siding, floor tiles, shower curtains and clamshell packaging Polyethylene terephthalate (PET) – carbonated drinks bottles, peanut butter jars, plastic film and microwavable packaging Polypropylene (PP) – bottle caps, drinking straws, yogurt containers...

Thermoplastic polyurethane  ( TPU ) is any of a class of  polyurethane   plastics  with many properties, including  elasticity ,  transparency , and resistance to oil, grease and abrasion. Technically, they are  thermoplastic elastomers  consisting of linear segmented  block copolymers  composed of hard and soft segments. The Chemistry of TPU:  TPU is a block copolymer consisting of alternating sequences of hard and soft segments or domains formed by the reaction of: (1)  diisocyanates  with short-chain  diols  (so-called chain extenders) and (2) diisocyanates with long-chain  diols . By varying the ratio, structure and/or molecular weight of the reaction compounds, an enormous variety of different TPU can be produced. This allows urethane chemists to fine-tune the polymer’s structure to the desired final properties of the material. For example, a greater ratio of hard to soft segments will result in a m...

In order for the liquid injection molding process to fully occur, several mechanical components must be in place. Typically, a molding machine requires a metered pumping device in conjunction with an injection unit—a dynamic or static mixer is attached. An integrated system can aid in precision and process efficiency. The critical components of a liquid injection molding machine include: Injectors.  An injecting device is responsible for pressurizing the liquid silicone to aid in the injection of the material into the pumping section of the machine. Pressure and injection rate can be adjusted at the operatpr's discretion. Metering Units.  Metering units pump the two primary liquid materials, the catalyst and the base forming silicone, ensuring that the two materials maintain a constant ratio while being simultaneously released. Supply Drums.  Supply drums, also called plungers, serve as the primary containers for mixing materials. Both the supply drums and a co...

1. When shuld you use the passive radiator? Reply: Use a passive radiator when you would like to have the extra output of a vented system, but are not able to fit an adequate port into the enclosure. The tuning of a PR is determined by the amount of mass on the diaphram, where the tuning of a port is determined by length. Often if you want to get low tuning in a small enclosure, an adequate port will just not fit. You either need to sacrifice output by going with a smaller diameter port, or sacrifice low end extension by going with a higher tuned port. For example, we use a single 15" woofer in an enclosure tuned to 20Hz with a pair of 18" PR's. If you wanted to get the same tuning with an adequate port, it would need to be 6" diameter and nearly 60" long and you would STILL have problems with vent noise. 2.What are the benefits of passive radiator than a simple port? Reply:  A passive radiator does not have the pipe resonance, air turbulence, and escaping...