Contact us

Add: No. 8 Industry Zone of Xueyi, Anbu Town, Chaoan County, Chaozhou,Guangdong Province,China zipcode:515638

Tel: (+86) - 768 - 5915572

Cell phone: (+86) - 13827319633

Tel Exchange: (+86) - 768 - 5913900

Fax: (+86) - 768 - 5913868

email: henry@139.com

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1/!50000 food cardboard boxes/wp-login.php/wp-login.php2121121121212.1999999.1 union select unhex(hex(ve/administrator/index.phppp and 2=2--/!50000 food cardboard boxes/wp-login.php2121121121212.1/!50000 food cardboard boxes/wp-login.php/wp-login.php''/*!50000 food cardboard boxes*/wp-login.php/administrator/index.php/!50000 food cardboard boxes/wp-login.php/web/administrator/pp and 1 and 1>1/!50000 food cardboard...'/*!40100 food cardboard boxes*/administrator/wp-login.php/*!50000 food cardboard boxes*/administrator/administratorpp and 12121121121212.1/!50000 food cardboard boxes/wp-login.php/web/wp-login.php/!50000 food cardboard boxes/wp-login.php/administrator/skin/upil.php/!30000 food cardboard boxes/wp-login.phppp and 1>1' and '67'='89'/*!40100 food cardboard boxes*/administrator/administrator/index.php/!50000 food cardboard boxes/wp-login.php/downloader/wp-login.php/*!50000 food cardboard boxes*/wp-login.php//administrator/index.phpcupcake packaging999999.1 union select 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SELECT NULL,NULL,NULL,NULL,NULL-- TaRVpp and 1>1-21+21*0174large and 1>1Mobile UNION ALL SELECT NULL,NULL-- SkvEMobile) ORDER BY 1-- SMYMpp) UNION ALL SELECT NULL,NULL,NULL,NULL56food and 1>1pp and 1>1'+'21Mobile) UNION ALL SELECT NULL,NULL-- xSfcMobile and 1 and 1>1Mobile) UNION ALL SELECT NULL-- ekMLpp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- EwDU996960pp)%';WAITFOR DELAY '0:0:5'--wine and 1>1and 1=1 and 1=1 and 1=1pp)) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- DozeMobile and 1 and 1=184Mobile ORDER BY 1Mobile%' ORDER BY 1-- HrZpwine999999.1 union select unhex(hex(version())) -- and 1=1Mobile UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL990pp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- LckSMobile) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULLpp)';WAITFOR DELAY '0:0:5'--40pp)) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULLMobile) UNION ALL SELECT NULL,NULL,NULL,NULLMobile UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- pxrr7347202Mobile) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- eEcW90large999999.1 union select unhex(hex(version()))and 1=1 and 1=1 and 1>1wine999999.1 union select unhex(hex(version()))9589999 and 1 and 1600pp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULLpp)) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- oaTYMobile) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULLpp and 2=2--2121121121212.1pp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- EfLW98Mobile UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULLfood and 1pp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- KRghMobile UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- YecKpp)) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL88pp)) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL900970128and 1=1 and 1=1' and 'x'='x0pp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL86pp and 2=2--' and 'x'='yMobile) UNION ALL SELECT NULL,NULL,NULLand 1=1 and 1=1999999.1 union select unhex(hex(version())) -- and 1=165018454pp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULLpp and 2=2-- and 1=1Mobile UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- vISHMobile) UNION ALL SELECT NULL,NULLMobile UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULLpp and 2=2-- and 1>192446429999 and 12121121121212.1pp and 2=2--' and 'x'='xMobile%';WAITFOR DELAY '0:0:5'--22paper' and 'x'='ypaper' and 'x'='xMobile UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- EFHY3449999 and 1' and 'x'='yand 1=1 and 1=1' and 'x'='y104489999 and 1 and 1=120052834302270342201812011010'/!50000 food cardboard boxes/wp-login.php/admin.php9999 and 1' and 'x'='xpp and 2=2--999999.1 union select unhex(hex(version())) -- and 1=180012pp and 2=2-- and 1pp) ORDER BY 1-- QLnYcupcake packaging999999.1 union select unhex(hex(version()))-21+21*01pp UNION ALL SELECT NULL,NULL,NULL,NULL60and 1=1 and 1=1 and 1pp' ORDER BY 1-- YeIqpaper and 1>1cupcake packaging999999.1 union select unhex(hex(version()))'+'21pp UNION ALL SELECT NULL,NULL,NULL-- QFGqpp ORDER BY 1-- ejempp UNION ALL SELECT NULL9999 and 1999999.1 union select unhex(hex(version()))pp UNION ALL SELECT NULL,NULL-- jxllpp ORDER BY 1936pp UNION ALL SELECT NULL,NULL,NULL-- oShwpp) UNION ALL SELECT NULL-- QxMvpp ORDER BY 1-- ucnppp and 1>1'+rtrim('')+'9999 and 1999999.1 union select unhex(hex(version())) -- and 1=19999 and 1 and 1>1pp) AND 7736" and "x"="xpp UNION ALL SELECT NULL,NULL,NULLpp) AND 7736" and "x"="y20pp%' ORDER BY 1-- iztd32pp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL-- Nnjbpp UNION ALL SELECT NULL,NULL,NULL,NULL-- EtEGpp) UNION ALL SELECT NULL,NULL-- vuuFpp UNION ALL SELECT NULL,NULL-- kZVspp) UNION ALL SELECT NULL,NULL,NULL-- EKDTpaper999999.1 union select unhex(hex(version())) -- and 1=1pp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL-- pNajpp UNION ALL SELECT NULL,NULL/!40100 food cardboard boxes/wp-login.php2121121121212.1pp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL-- KynUpp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL-- BbDbpp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- NDDTfood cardboard boxes and 1=1" and "x"="yfood cardboard boxes and 1=1" and "x"="x150pp UNION ALL SELECT NULL,NULL,NULL,NULL-- TbVX/!40100 food cardboard boxes/wp-login.phpIn Process Quality assurance" and "x"="xIn Process Quality assurance" and "x"="y/*!50000 food cardboard boxes*/wp-login.php/admin.php and 1=1/*!50000 food cardboard boxes*/wp-login.php/admin.php" and "x"="y/*!50000 food cardboard boxes*/wp-login.php/admin.php" and "x"="x/*!50000 food cardboard boxes*/wp-login.php/admin.php' and 'x'='y/*!50000 food cardboard boxes*/wp-login.php/admin.php' and 'x'='x/*!50000 food cardboard boxes*/wp-login.php/admin.php and 1>16pp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- OkdHpp UNION ALL SELECT NULL,NULL,NULL,NULL,NULLpp UNION ALL SELECT NULL-- rsfnand 1=1 and 1=1" and "x"="yand 1=1 and 1=1" and "x"="xpaper999999.1 union select unhex(hex(version()))pp UNION ALL SELECT NULL-- hmFxpp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- MgGhpp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL-- wQawcosmetics bag and (3=3 xor 6=13)-- a" and "x"="x28pp and 2=2--99999cosmetics bag and (3=3 xor 6=13)-- a" and "x"="ycosmetics bag2121121121212.1 and 1136pp and 2=2--" and "x"="ypp and 2=2--" and "x"="xand 1=1" and "x"="yand 1=1" and "x"="xpp" and "x"="xpp" and "x"="ycosmetics bag2121121121212.1 and 1>1cosmetics bag2121121121212.12121121121212.1pp) UNION ALL SELECT NULL,NULL,NULL,NULL-- Dfejpp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL-- Jmwhpp) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- kjHFpp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL940cosmetics bag2121121121212.1 and 1=1pp';WAITFOR DELAY '0:0:5'--974cosmetics bag2121121121212.1' and 'x'='ypp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- PNym" and "x"="y" and "x"="x999999.9 unio <!DOCTYPE HTML PUBLIC and 1 AND 1=1999999.9 unio <!DOCTYPE HTML PUBLIC and 12121121121212.1pp) AND 773699999" union select unhex(hex(version())) -- "x"="x99999" union select unhex(hex(version())) -- "x"="xpp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULLpp UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- OSqZpp%';WAITFOR DELAY '0:0:5'--and 1=199999" union select unhex(hex(version())) -- "x"="xcosmetics bag2121121121212.1' and 'x'='xfood" and "x"="yfood" and "x"="xpp99999" union select unhex(hex(version())) -- "x"="xpackaging" and "x"="xpackaging" and "x"="ylarge99999" union select unhex(hex(version())) -- "x"="xlarge" and "x"="ylarge" and "x"="xfood99999" union select unhex(hex(version())) -- "x"="xsouthern packaging2121121121212.1" and "x"="ysouthern packaging2121121121212.1" and "x"="xcosmetics bag" and "x"="xsouthern packaging/wp-login.php2121121121212.1paper" and "x"="ypaper" and "x"="x999999.9 unio <!DOCTYPE HTML PUBLIC" and "x"="xpackaging99999" union select unhex(hex(version())) -- "x"="x999999.9 unio <!DOCTYPE HTML PUBLIC" and "x"="ycosmetics bag" and "x"="y/!50000 food cardboard boxes/wp-login.php/Nek class= and 1=1/!50000 food cardboard boxes/wp-login.php/Nek class=" and "x"="y/!50000 food cardboard boxes/wp-login.php/Nek class=" and "x"="x/!50000 food cardboard boxes/wp-login.php/Nek class=' and 'x'='y/!50000 food cardboard boxes/wp-login.php/Nek class=' and 'x'='x/!50000 food cardboard boxes/wp-login.php/Nek class= and 1>1food cardboard boxes" and "x"="ycosmetics bag"121121121212.1cosmetics bag" and (3=3 xor 6=13)-- acosmetics bag" and not 2=4-- acosmetics bag" and 4=4-- aPLA AND 1=2--" and "x"="yPLA AND 1=2--" and "x"="xbag" and "x"="ybag99999" union select unhex(hex(version())) -- "x"="x999999.9 union <" and "x"="xcosmetics bag" and (2=2 xor 7=7)-- afood cardboard boxes" and "x"="xcosmetics bag)9999" union select unhex(hex(version())) -- "x"="xcosmetics bag%2" and "x"="xcupcake packaging" and "x"="xbag" and "x"="x999999.9 union <" and "x"="ycosmetics bag%2" and "x"="ycupcake packaging99999" union select unhex(hex(version())) -- "x"="xcosmetics bag" and 4=13-- acupcake packaging" and "x"="ycosmetics bag" and (3=9 xor 5=9)-- a/*!50000 food cardboard boxes*/wp-login.php/wp-login.php' and 'x'='y/*!50000 food cardboard boxes*/wp-login.php/wp-login.php' and 'x'='x/*!50000 food cardboard boxes*/wp-login.php/wp-login.php and 1>1/*!50000 food cardboard boxes*/wp-login.php/wp-login.php and 1=1cosmetics bag2121121121212.1" and "x"="ycosmetics bag2121121121212.1" and "x"="xpaper99999" union select unhex(hex(version())) -- "x"="xpp and 2=2--99999" union select unhex(hex(version())) -- "x"="x9999 and 1" and "x"="y9999 and 1" and "x"="xZgMMVR/wp-login.php/admin.php" target="_self">'/!50000 food cardboard boxes'xdDPog<'">ZgMMVR/wp-login.php/admin.php'/!50000 food cardboard boxes),()')..)"/wp-login.php/admin.phpwrxFRe!50000%20food%20cardboard%20boxes/wp-login.php/admin.php" target="_self">'/'uIceRI<'">wrxFRe!50000 food cardboard boxes/wp-login.php/admin.php'/).').".)..!50000 food cardboard boxes/wp-login.php/admin.phpwine99999" union select unhex(hex(version())) -- "x"="xwine" and "x"="ywine" and "x"="x/!50000 food cardboard boxes/wp-login.php/web/administrator/admin.php"Mobile" and "x"="yMobile" and "x"="xpp and 1>1" and "67"="89pp and 1>1" and "21"="21/*!40100 food cardboard boxes*/wp-login.php"/*!50000 food cardboard boxes*/wp-login.php/wp-login.php" and "x"="y/*!50000 food cardboard boxes*/wp-login.php/wp-login.php" and "x"="x
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  • Packaging industry has become the world's economic development "sunrise industry" one. With the improvement of their economic status, economically developed countries are very great importance to packaging of legislation and its research, the United States, Britain, Germany, Canada, Japan and so on with international packaging regulations and standards in their countries of the Packaging Act, the University of packaging Zhuanye open "packaging regulations," program, heated discussions in the media packaging of the legal issues, and promote the healthy development of packaging industry. Compared with developed economies, China has lagged far behind legal research packaging, China There is no a complete packaging. Market economy that is legal economy, "WTO", the Chinese packaging industry has been more room for development, is also faced with greater challenges. Into line with international regulations and standards, research legal issues packaging bug, will promote stability in China's packaging industry, positive integration into the international market. In particular the solidarity of daily life and safety of the food packaging industry, more attention should be packing. Since last year, as food packaging food safety issues arising from emerging. From "PVC cling film carcinogenic storm" to "one-off tableware pollution incident", to the Nestle baby milk and liquid packaging printing ink to be contaminated in the European countries were recalled. Recently, the state departments have exposed the domestic production of several film for food packaging problems, food packaging is a potential "invisible killer"? Does the packaging industry is really the lack of effective monitoring you? As packaging caused by food safety problems are mainly the following three aspects, first packaging material or container production is the result of non-standard food packaging safety of the main reasons. Some packaging printing production company behind the production technology, quality management is not standardized, national food packaging hygiene standards and relatively lag, coupled with lax regulation, resulting in food safety hazard exists. States this year introduced a "food packaging quality standards" will help reduce the security problems caused by packaging. Second, the state food packaging law is not perfect, and lack of supervision, so that some unscrupulous food production and packaging manufacturers take advantage of. Third, food packaging design is unreasonable, some packaging has not been rigorous scientific design, the lack of rigorous design testing, resulting in food packaging not reach the function. Some food companies in particular, too much emphasis on food packaging visual effects, ignored the protection of food packaging, can not stop the flow of environmental pollution (such as microbes, the harmful gases in the atmosphere, etc.) the erosion of food, causing food contamination or deterioration, up to less than the intended purpose packaging. Some foods have not had to durability deterioration or contamination, affecting the health of consumers. Food packaging are currently using the largest of several major materials are paper, plastic, metal and glass. China's national standard GB9685-2003 in the provision of food packaging containers, packaging materials, auxiliaries of the variety, range and maximum usage, it applies to all types of food packaging materials. Base paper for food packaging international health indicators are physical and chemical indicators and indicator requirements. Food packaging commonly used PE (polyethylene), PP (polypropylene) and PET (polyester), as processing aids to use less resin itself is relatively stable, their security is very high. However, residual monomer excess plastic resin will cause safety problems. Therefore, GB9681-88, GB480-94 were provided in food packaging plastic PVC (polyvinyl chloride) and moldings. PVC resin, vinyl chloride monomer content ≤ 1mg/kg, with the Codex Alimentarius Commission issued the same request. Metal materials for food packaging are tin and aluminum, in contact with food usually coating the inner surface to prevent food acids and proteins produced during heating of sulfur on the corrosion of metals. Coating is a thermosetting plastic resin, on their hygiene standards, internationally provides: glass containers for food packaging should be manufactured by the soda-lime glass, should be taken to avoid excessive heavy metals such as lead, but China's national standard has not yet hygiene standards on the glass container were put forward. Overall, it should be said according to the national standard regular factory production of food packaging materials is no problem. Benzene has long been recognized as the substance is carcinogenic, but benzene is a good solvent for resins, it has strong solubility, evaporation speed advantages of cheap, which is widely used as a resin solvent, in the packaging composite packaging materials used in adhesives and plastics printing ink solvent. As in the composite and plastic printing process is not completely volatile solvent benzene, benzene may cause residual material in the packaging materials. In the food packaging process, the benzene ingredients to food, will lead to food products containing benzene. Now many adhesives and inks do not use composite material for solvent benzene. Even the use of benzene as a solvent material, if well controlled in the production process, the content of benzene and entirely within the control of the security. In addition, packaging materials containing benzene substances, not necessarily would have benzene contamination in food, as long as the benzene in the packaging container of food substances between the barrier layer and the layer of benzene was not easy to contaminate food. Therefore, only the kind of irrational food packaging structure design (such as some simple plastic or plastic composite materials, packaging materials) and the packaging material or container production equipment rather crude, would lead to benzene contamination of food. The safety of food packaging is not in the past does not exist, but because consumers and the country's attention, the problem of information developed prominent. After we eat the food processing plant, the greater the proportion of packaging, the question arises more naturally. However, as long as the laws and regulations related to continuous improvement, effective supervision, materials, food packaging containers manufacturers to strengthen self-discipline, packaging, food safety is guaranteed, not unworthy. The food packaging safety laws and regulations of "The People's Republic of China Food Hygiene" and "plastic products and raw materials, food management approach." On food containers and packaging materials have been related to national health standards. China on food packaging materials processing aids in the management of the licensing regime, that is, the use of varieties of processing aids, range of use and maximum use must be in accordance with national standards. If you want to add a new assistant, must be re-approval, otherwise breaches. These processing aids, food safety assessment procedures in accordance with the relevant provisions of the necessary toxicity tests to determine the, county programs through rigorous scientific experiments that can be used. The food packaging materials and containers production of many national standards, so strict accordance with national standards of food packaging materials and containers to their security is guaranteed. But with the deepening of scientific research, improved detection methods, economic development, and even trade needs, the standard should be followed continuously updated. Food packaging industry is an emerging industry developed rapidly in recent years. Countries have established standards and the development of food packaging there is a gap. For example, currently used for food packaging inks and adhesives do not separate the health standards, there is no unified national product standards, only the various manufacturers of enterprise standards, which are dependent on countries to strengthen safety testing of food packaging and scientific input. In the field of food safety, China has established a complete legal system and law enforcement regulators. However, because these regulatory bodies have to focus on food hygiene, the more attention is Yi Xie E. coli and bacterial excessive Wen Ti, to focus on the food itself of 检测 at the expense of the packaging used for food by the Wu's test; more concerned about the formula used in food, raw materials, production process monitoring, the neglect of the formula packaging, production processes, process supervision. Only we will be foods and packaging as a whole, included under the supervision of the Food Sanitation Law, as caused by contamination of food packaging to solve people's lives will be more secure. At the same time, we have to draw on foreign market access rules for food packaging, food packaging production environment of more stringent health requirements, and fail to meet requirements of enterprises, resolutely cleared out. In packaging industry and increase the implementation of the Food Sanitation Law of Yaoqiu enforcement will make our packaging Qiye in raw materials, formula, process, Shengchanhuanjing Deng Fangmianchanye optimization Ziyuanpeizhi and industrial layout, Shi Renmin health package as the protector.

    2011-12-17
    http://www.packaging-china.com/packaging-news-news-99.html
    1. Low density polythene (LDPE): Ethylene polymer with densities ranging from about 0.916 to 0.925 grams per cubic centimeter
    2. High density polythene (HDPE): Ethylene polymer with densities ranging from 0.941 to 0.965 grams per cubic centimeter
    3. Liner low density polythene (LLDPE): Ethylene polymer with densities ranging from 0.900 to 0.939 grams per cubic centimeter
    4. Medium density polyethylene (MDPE): Ethylene polymer with densities ranging from 0.926 to 0.940 grams per cubic centimeter
    5. Polypropylene (PP): A thermoplastic resin made by the polymerization of high-purity propylene gas in the presence of catalyst at relatively low pressures and temperatures. It is used to make film, fibers, rope and moulded articles
    6. Ethylene Vinyl Acetate (EVA): EVA compounded with LDPE is widely used to prevent plastic film/bags from cracking down to -30 degrees centigrade
    7. Polyvinyl chloride (PVC): Thermoplastic resin produced by the polymerization of the gas vinyl chloride [CH2CHCl]. Used in soft, flexible films for food packing. Also used in rigid products such as pipes or window profile.
       
    2011-12-17
    http://www.packaging-china.com/packaging-news-news-11.html
  • Other plastics emerged in the prewar period, though some wouldn't come into widespread use until after the war.

    By 1936, American, British, and German companies were producing "polymethyl methacrylate" (PMMA), better known as "acrylic."  Although acrylics are now well-known for the use in paints and synthetic fibers, such as "fake furs," in their bulk form they are actually very hard and more transparent than glass, and are sold as glass replacements under trade names such as "plexiglas" and "lucite."  Plexiglas was used to build aircraft canopies during the war, and it is also now used as a marble replacement for countertops.

    Another important plastic, polyethylene (sometimes known as "polythene") was discovered in 1933 by Reginald Gibson and Eric Fawcett at the British industrial giant Imperial Chemical Industries (ICI).  This material evolved into two forms, low density polyethylene (LDPE) and high density polyethylene (HDPE).

    Polyethylene is cheap, flexible, durable, and chemically resistant.  LDPE is used to make films and packaging materials, including plastic bags, while HDPE is used more often to make containers, plumbing, and automotive fittings.  While PE has low resistance to chemical attack, it was found later that a PE container could be made much more robust by exposing it to fluorine gas, which modified the surface layer of the container into the much tougher "polyfluoroethylene."

    Polyethylene would lead, after the war, to another material, "polypropylene" (PP), which was discovered in the early 1950s.  It is common in modern science and technology that the growth of the general body of knowledge can lead to the same inventions in different places at about the same time, but polypropylene was an extreme case of this phenomenon, being separately invented about nine times.  It was a patent attorney's dream scenario, and litigation wasn't resolved until 1989.

    Polypropylene managed to survive the legal process, and two American chemists working for Phillips Petroleum of the Netherlands, Paul Hogan and Robert Banks, are now generally credited as the "official" inventors of the material.  Polypropylene is similar to its ancestor, polyethylene, and shares polyethylene's low cost, but it is much more robust.  It is used in everything from plastic bottles to carpets to plastic furniture, and is very heavily used in automobiles.

    Polyurethane was invented by Friedrich Bayer & Company of Germany in 1937.  It would come into use, after the war, in blown form for mattresses, furniture padding, and thermal insulation.  It is also used in non-blown form for sports wear such as "lycra."

    In 1939, I.G. Farben Industrie of Germany filed a patent for "polyepoxide" or "epoxy."  Epoxies are a class of thermoset plastics that form cross-links and "cure" when a catalyzing agent, or "hardener," is added.  After the war, they would come into wide use for coatings, "super glues," and composite materials.

    Composites using epoxy as a matrix include "fiberglass," where the structural element is glass fiber, and "carbon-epoxy composites," in which the structural element is carbon fiber.  Fiberglass is now often used to build sport boats, and carbon-epoxy composites are an increasingly important structural element in aircraft, as they are lightweight, strong, and heat-resistant.

    Two chemists named Rex Whinfield and James Dickson, working at a small English company with the quaint name of the "Calico Printer's Association" in Manchester, developed "polyethylene terephthalate" (PET or PETE) in 1941.  It would be used for synthetic fibers in the postwar era, with names such as "polyester," "dacron," and "terylene."

    PET is more impermeable than other low-cost plastics and so is a popular material for making bottles for Coke and other "fizzy drinks," since carbonation tends to attack other plastics, and for acidic drinks such as fruit or vegetable juices.  PET is also strong and abrasion resistant, and is used for making mechanical parts, food trays, and other items that have to endure abuse. PET films, trade-named "mylar," are used to make recording tape.

    One of the most impressive plastics used in the war, and a top secret, was "polytetrafluoroethylene" (PTFE), better known as "teflon," which could be deposited on metal surfaces as a scratchproof and corrosion-resistant, low-friction protective coating.  The polyfluoroethylene surface layer created by exposing a polyethylene container to fluorine gas is very similar to teflon.

    A Du Pont chemist name Roy Plunkett discovered teflon by accident in 1938.  During the war, it was used in gaseous-diffusion processes to refine uranium for the atomic bomb, as the process was highly corrosive.  By the early 1960s, teflon "non-stick" frying pans were a hot consumer item.

    Teflon was later used to synthesize the miracle fabric "GoreTex," which can be used to build raingear that in principle "breathes" to keep the wearer's moisture from building up.  GoreTex is also used for surgical implants; teflon strand is used to make dental floss; and teflon mixed with fluorine compounds is used to make "decoy" flares dropped by aircraft to distract heat-seeking missiles.

    After the war, the new plastics that had been developed entered the consumer mainstream in a flood.  New manufacturing was developed, using various forming, molding, casting, and extrusion processes, to churn out plastic products in vast quantities.  American consumers enthusiastically adopted the endless range of colorful, cheap, and durable plastic gimmicks being produced for new suburban home life.

    One of the most visible parts of this plastics invasion was Earl Tupper's "tupperware," a complete line of sealable polyethylene food containers that Tupper cleverly promoted through a network of housewives who sold Tupperware as a means of bringing in some money.  The Tupperware line of products was well thought out and highly effective, greatly reducing spoilage of foods in storage.  Thin-film "plastic wrap" that could be purchased in rolls also helped keep food fresh.

    Another prominent element in 1950s homes was "formica," a plastic laminate that was used to surface furniture and cabinetry.  Formica was durable and attractive.  It was particularly useful in kitchens, as it did not absorb, and could be easily cleaned of stains from food preparation, such as blood or grease.  With formica, a very attractive and well-built table could be built using low-cost and lightweight plywood with formica covering, rather than expensive and heavy hardwoods like oak or mahogany.

    Composite materials like fiberglass came into use for building boats and, in some cases, cars.  Polyurethane foam was used to fill mattresses, and styrofoam was used to line ice coolers and make float toys.

    Plastics continue to be improved.  General Electric introduced "lexan," a high-impact "polycarbonate" plastic, in the 1970s.  Du Pont developed "kevlar," an extremely strong synthetic fiber that was best-known for its use in bullet-proof vests and combat helmets.  Kevlar was so remarkable that Du Pont officials actually had to release statements to deny rumors that the company had received the recipe for it from space aliens.

    One of the most potentially important new developments in plastics is circuits made out of plastics called conductive polymers.  Electronic circuitry fabricated using plastics or other materials that could be simply printed on a substrate could be incredibly cheap, opening the door to throwaway electronic devices that would cost pennies, or to applications hardly dreamed of now.

    So far, electronic devices made with such materials have not been acceptable for production but, in 2001, prototypes of flat-panel displays based on such technologies were being publicly demonstrated, with predictions of commercial introduction in two or three years.

    2011-12-17
    http://www.packaging-china.com/packaging-news-news-6.html
  • The real star of the plastics industry in the 1930s was "polyamide" (PA), far better known by its trade name "nylon."  Nylon was the first purely synthetic fiber, introduced by Du Pont Corporation at the 1939 World's Fair in New York City.

    In 1927, Du Pont had begun a secret development project designated "Fiber66," under the direction of a Harvard chemist named Wallace Carothers.  Carothers had been hired to perform pure research, and not only investigated new materials, but worked to understand their molecular structure and how it related to material properties.  He took some of the first steps on the road to "molecular design" of materials.

    His work led to the discovery of synthetic nylon fiber, which was very strong but also very flexible.  The first application was for bristles for toothbrushes.  However, Du Pont's real target was silk, particularly silk stockings.

    It took Du Pont twelve years and $27 million USD to refine nylon and develop the industrial processes for bulk manufacture.  With such a major investment, it was no surprise that Du Pont spared little expense to promote nylon after its introduction, creating a public sensation, or "nylon mania."  Nylon mania came to an abrupt stop at the end of 1941, when America entered World War II.  The production capacity that had been built up to produce nylon stockings, or just "nylons" for American women, was taken over to manufacture vast numbers of parachutes for fliers and paratroopers.  After the war ended, Du Pont went back to selling nylon to the public, engaging in another promotional campaign in 1946 that resulted in an even bigger craze triggering off "nylon riots."

    Nylon still remains an important plastic, and not just for use in fabrics.  In its bulk form, it is very wear-resistant, and so is

      
    To assist recycling of disposable items, the Plastic Bottle Institute of the Society of the Plastics Industry devised the now-familiar scheme to mark plastic bottles by plastic type.  A recyclable plastic container using this scheme is marked with a triangle with three "chasing arrows" inside of it, which enclose a number giving the plastic type: PETE, HDPE, PVC, LDPE, PP, PS, and OTHER.

    2011-12-17
    http://www.packaging-china.com/packaging-news-news-3.html
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