This section provides an overview for shielding sheet as well as their applications and principles. Also, please take a look at the list of 11 shielding sheet manufacturers and their company rankings. Here are the top-ranked shielding sheet companies as of December, 2023: 1.U.S. Industrial Tool Company, 2.Shandong Roc Tarp New Material Technology Co., Ltd, 3.TOYOCHEM CO., LTD..
1975~1995: Worked at Hitachi, Ltd.
Engaged in research on the irradiation effects of nuclear reactor materials at the Energy Research Institute. Received the Japan-American Atomic Energy Society Award for his research achievements.
Engaged in soft error research caused by environmental neutron beams in semiconductor devices at the Institute of Industrial Science. Research achievements: Awarded the IEEE Fellow and the Teiichi Yamazaki Award.
Currently active as a writer.
A tarpaulin is a sheet made of a special material that can shield against heat, electromagnetic waves, radiation, and other harmful effects on living organisms and electronic devices.
Tarpaulin shielding increases in thickness, thereby increasing the rate at which the adverse effects are shielded. Tarpaulins can be highly effective by using the appropriate tarpaulin for a particular application, as the material used has different characteristics, such as workability, etc.
In addition, films and sealed products are also being produced to match the shape of the object to be shielded.
Tarpaulins are used to block radiation from the outside. They are mainly used in the following two situations:
Radiation tarpaulin can be used to shield external radiation. Uses of radiation shielding sheets include protective clothing and protective equipment to protect workers from radiation exposure in environments where radiation is handled, such as the disposal of radioactive waste at nuclear facilities and reconstruction work in areas affected by nuclear power plant accidents.
Radiation medical facilities sometimes irradiate affected areas of tumors with electron, neutron, and proton beams, and they are also used to shield X-rays and gamma rays generated from these particle beams.
It is known that electromagnetic waves transmitted from broadcasting stations and smartphone base stations, as well as those generated by smartphones, tablets, and other devices, can adversely affect the human body and cause electronic equipment to malfunction. A tarpaulin is used to weaken the effects of such electromagnetic waves sufficiently.
A tarpaulin uses the properties of special materials that can shield radiation, so the characteristics of the tarpaulin vary greatly depending on the material used.
Tarpaulin shielding sheets utilize the properties of special materials that can shield radiation, so the characteristics vary greatly depending on the material used.
Tarpaulins made of materials such as lead or tungsten are highly effective in shielding, but are heavy and cannot be easily handled. It is necessary to consider the external appearance when bending or jointing it to suit the intended use.
Tarpaulins made of rubber or resin are designed to enhance the shielding effect by dispersing a material that shields or absorbs radiation within the sheet.
In electromagnetic shielding, radio waves are surrounded by conductive materials such as copper, which reflect and scatter them on their surfaces, preventing them from entering or leaking. Magnetic shielding surrounds the space to be shielded with iron-based materials that are easily magnetized, bypassing magnetism and preventing it from entering. The need for magnetic shielding is increasing for electronic devices such as MRIs, which are susceptible to the effects of magnetism.
Tarpaulin should be used according to the type and energy of the radiation.
Alpha rays are helium ions consisting of two protons and two neutrons. They are usually emitted from the nucleus of a radioactive isotope by a physical phenomenon called alpha decay. Because of their low energy (less than 10 MeV), they have low penetrating power and can be almost completely shielded with a sheet of paper, so a tarpaulin is not considered necessary.
Beta rays are emitted from the nucleus of a radioactive isotope by a physical phenomenon called beta decay. A tarpaulin is not necessary because it poses no health risk and does not cause malfunction of electronic equipment.
Gamma rays are emitted by photons from the nucleus of a radioactive isotope. They are highly penetrating and do not directly cause electrical failures in electronic equipment, but they can cause degradation of constituent materials and pose a significant health risk, so shielding with lead or tungsten of a thickness appropriate for the energy is required.
For low-energy gamma rays, tungsten alloys, which are mainly composed of tungsten and have a low environmental impact, are commonly used as tarpaulins, but their use has been limited due to their flexibility, workability, and high price because they are sintered at high temperatures.
A new tungsten sheet made of tungsten and resin has been developed as a tarpaulin material to overcome these problems. This tungsten sheet is manufactured by heating and kneading tungsten powder and an elastomer resin that can be recycled. This process produces a composite material of tungsten and resin, and then molding this composite material produces a tungsten sheet with high density and flexibility.
X-rays are the same photons as gamma rays, but they are produced artificially by a device called an X-ray tube. They are used primarily for X-ray examinations, but are generally much lower energy (a few keV) than gamma rays and pose no risk to health. They do not cause malfunction of electronic equipment and do not require a tarpaulin. White barium sulfate, which is taken during upper gastrointestinal tract X-rays at physical examinations, has an X-ray attenuating effect and is used to increase the resolution of radiographs.
Although extremely low dose rate (about 12 neutrons per square centimeter per hour), high-energy (>1 MeV) neutron beams exist in nature. They are not harmful to the human body, but can cause malfunctions in electronic equipment.
In general, lead blocks and concrete walls several meters thick are used to tarpaulin high-energy gamma and neutron rays, while hydrogen-rich blocks such as paraffin, polyethylene, and water are used to tarpaulin weak low-energy neutrons, and when sheets are used, they contain B-10, B-10 is a substance such as boric acid, and while most boron in nature is B-11, about 20% is B-10. Gadolinium and cadmium are toxic substances, so environmental considerations are necessary.
In order to treat tumors, neutron beams, high-energy electron beams, and proton beams are irradiated to the affected area. In such cases, gamma and neutron rays are also generated, so it is necessary to consider the use of shielding materials around the irradiation equipment.
Tarpaulin shielding sheets are known to be made of thin PET (polyethylene terephthalate) film with a conductive shielding layer, such as copper, formed by vacuum deposition on its surface. In addition to excellent electromagnetic shielding properties, this sheet is flexible, lightweight, and breathable, and its porous structure provides an anchoring effect.
Taking advantage of its high shielding performance and thin film characteristics, the sheet is utilized for electromagnetic shielding of various electronic devices, such as mobile devices that require space saving and cable sheathing materials that require processing on curved surfaces.
Tarpaulins are also available in the form of flexible paper and film made from stainless steel and copper materials using paper-making technology. The sheets can be easily cut into the desired shapes with scissors or cutters. During processing, sintered metallic fibers prevent fibers from falling out after processing, and the impact on the work environment is also taken into consideration.
This tarpaulin sheet has electromagnetic wave tarpaulin performance that takes advantage of the high conductivity characteristic of metal and the cushioning and flexibility characteristic of paper, as well as the anchoring effect and air permeability provided by the porous structure. Based on such performance, the sheet is utilized as noise suppression material for various electronic devices and electromagnetic wave shielding filter for differential pressure reduction.
*Including some distributors, etc.
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U.S. Industrial Tool Company is a manufacturer and supplier of stationary hot and cold dimpling machines. Established in 1959, the company is headquartered in Gardena, California, USA. The company's main activities encompass designing, manufacturing, and distributing made-to-order tools such as riveting, riveting tool kits, sheet metal, air, and airframes as well as power plant tools and other miscleneous tools and parts. Its product offerings include carbide end mills, drills, and reamers, serving industries such as aerospace, automotive, and medical. U.S. Industrial Tool Company offers services like tool resharpening, technical support, tool Repair, tool design and material testing.
HOZAN TOOL INDUSTRIAL CO., LTD., established in 1946 in Naniwa-ku, Osaka, Japan, is a manufacturer and supplier of electronics and bicycle tools. Their product range includes soldering irons for electronics assembly, various types of multimeters for electrical measurements, pliers for wire manipulation, diverse screwdrivers for fastening tasks, and wire strippers for precise wire preparation. Additionally, they also offer chemical products such as anti-rust oils, freezer sprays, cutting oil, and dusters.
Toyo Chem founded in 2011 is a leading manufacturer and supplier of polymers and coatings based in Tokyo, Japan. The company specializes in the production and distribution of polymer and coating-related products for various industries. While delivering new value and being close to customer needs, Toyo Chem offers innovative solutions tailored to meet industry requirements. Led by President Toshinori Machida, the company operates with a capital of 500 million yen and has a dedicated team of 566 employees.
Dandelion, established in 1993 and based in Yangzhou, China, is a manufacturer that provides tarpaulin finished product solutions. Its business scope includes various sectors such as home improvement, infrastructure projects, outdoor weather protection, logistics services, and garden & lawn applications. The company offers vinyl truck tarpaulins, clear tarps, mesh tarps, poly tarps, canvas tarps, and more. Its manufacturing equipment supports heat-welded seams, high-frequency welded seams, and various logo printing options. The company also handles documentation, including trade matters, clearance, and logistics. All of the products are made from RoHS-certified tarpaulin fabric.
FoShan LiTong FanPeng Co., LTD, established in 2010 and situated in Nanhai District, Foshan, Guangdong, China, is a manufacturer specializing in heavy-duty PVC coated tarpaulin products. The extensive product range features PVC tarpaulins, flood barriers crucial for flood control, sound barriers with noise reduction applications, industrial curtains, and PCA hoses. The company maintains a substantial inventory of raw materials and tarpaulin rolls and operates 120 production lines running 24/7, with the capability to provide a continuous output of 60,000 square meters of tarpaulin daily. Its products are exported worldwide, including to countries such as Kuwait, Thailand, the UK, the USA, and Chile.
Karnawat Canvas Company, founded in 1983 and based in Chennai, India, is a manufacturer offering a wide range of tarpaulin products. Its diverse offerings include tarpaulin sheets designed for domestic, commercial, and industrial applications, outdoor tents suitable for various outdoor activities, and shamiyana tents commonly used for weddings, parties, and seminars. The compay also provides vehicle covers to protect automobiles from environmental factors, and shade nets that offer shade and protection in nurseries and greenhouses. A quality inspection unit to ensure the quality of its products prior to final delivery is maintained.
Narmada Polyfab was established in 1993 and is based in Ahmedabad, Gujarat as a manufacturer and exporter of HDPE tarpaulin and tarpaulin sheets. The company’s product portfolio includes bike cover tarpaulin, tent tarpaulin, truck tarpaulin, agricultural tarpaulin, utility cover, water proof tarpaulin, PVC tarpaulin, HDPE woven fabric, HDPE laminated fabric, and HDPE laminated tarpaulin. The products are essential for various industrial and agricultural packaging applications, ensuring quality, reliability, and efficiency. The products are used in sectors such as FMCG, oil and gas, mining, marine, aerospace, and defense.
Qingdao SG Global Packaging Co.,Ltd was established in 1993 and is based in Qingdao, China as a manufacturer and exporter of polypropylene and polyethylene outer packing goods. The company’s product portfolio includes woven fabrics and bags, weed mat, silt fence, bulk bags, tarps, mesh bags, and more. The products are essential for agricultural and industrial packaging, ensuring quality, reliability, and efficiency. As for quality, it use quality raw materials and have a stringent quality control system that checks all items at least three times before loading. It guarantees consistent manufacturing, on-time delivery, skilled staff, and superior product quality.
Jiaxing Juming Advance Cover Co., Ltd, founded in 2016, based in Jiaxing, Zhejiang, China, is a manufacturer and supplier of tarpaulin and cover products. The company offers various products such as PVC coated tarpaulin, PVC mesh tarp, PVC clear vinyl, lumber tarp, and PVC clear curtain. It has invested 2 million RMB to purchase and improve various welding and sewing equipment, combined with scientific and efficient production steps, to provide customers with quality PVC tarpaulin solutions in construction, trucks, cargo freight, and outdoor.
Commercial Syn Bags Limited, founded in 1992, based in Indore, Madhya Pradesh, India, is a manufacturer and exporter of FIBC bulk bags, tarpaulin, PP fabric, woven bags, and other packaging products. The company offers various products such as FIBC bags, BOPP bags, builder bags, depot bags, and food grade FIBC bags. Its long-term success requires a total promise to excellent standards of productivity and quality, to working together efficiently & effectively. It believes in Ethical corporate behavior towards everyone the company work with, the communities it touches, and the environment on which we have an impact.
Shandong Roc Tarp New Material Technology Co., Ltd was established in 1993 and is based in Qingdao, China as a manufacturer and exporter of plastic tarpaulins. The company’s product portfolio includes woven fabrics and bags, weed mat, silt fence, bulk bags, tarps, mesh bags, and more. While ensuring a high level of quality and service, it is also providing in-depth customization, branding support, and overseas partner policies, helping customers to grow. It carries a complete line of tarpaulins, including PE tarps, PVC tarps, heavy-duty, waterproof, HDPE tarpaulins, rolls, sheets and custom solutions, and more for varieties of manufacturing applications.