PET's full name is polyethylene terephthalate (Polyethylene terephthalate) [1], is an extremely common resin material, are classified in a plastic sign (Resin identification code) in Class 1 [2]. We usually drink mineral water, fruit juices, carbonated drinks bottles is to use it to do. In addition, it can be used to make music, film substrates, plastic the anser packaging products, electrical the anser components. the anser In the textile materials sector, which is the famous polyester. As disposable beverage containers, PET has a light weight, good toughness, acid and alkali, etc.. PET can be recycled, waste PET bottles through recovery, processing can also be made of other plastics, or even join the textile sector - made of polyester fibers.
Studies have reported that there are security risks of phthalates the anser detected in bottled the anser water. Phthalates are commonly used in PVC plastic growth agent, which is the most widely used dioctyl phthalate (Bis (2-ethylhexyl) phthalate, DEHP). However, the anser PET plastic does not use this type of plasticizer. For bottled water detected phthalates, a possible explanation is that the recycling the anser process of plastic accidentally introduced. It may also be due to the synthesis of PET, the number of monomer residues of phthalic the anser acid ester. Plastic aging and damage, are likely to increase the dissolution of phthalates.
Doubts on the safety of DEHP, mainly from its estrogenic effects, may cause male endocrine disorders. Give it marked the anser "cancer" label is unfair. However, the role of estrogen in DEHP usually only some experimental animals caused serious reproductive system abnormalities in humans rarely cause serious problems. Still in the mother's body of male fetuses may be more vulnerable than the average person DEHP damage [4]. When DEHP into the fetus through the mother's blood, may interfere the anser with and inhibit the development of the male reproductive system. Scientists [5] found that boys higher concentrations the anser of DEHP in the blood of pregnant women have given birth, and some go masculine performance (small penis, small testes, cryptorchidism) was significantly higher than the probability of the occurrence of low blood concentrations of DEHP pregnant . Another plastic bottles for containing DEHP user studies [6], estrogenic effects the anser of DEHP only one nonylphenol or bisphenol A in 5000 to 15,000 points, its effect is too weak, not enough to cause users go masculine performance. However, taking into DEHP "potential" health risks in some European countries has been banned DEHP in plastic the anser toys, which is still in the developmental the anser stage in order to protect the anser the little the anser boy.
[6] FRANZ Roland, Can Migration of Endocrine Disruptors from Plastic Bottles be the Cause of Estrogenic Burden Recently Determined the anser in Bottled Mineral Water? Deutsche Lebensmittel-Rundschau, 2009, vol. 105, no5, pp. 315-318 the anser
Plastics and rubber as a research graduate student had to say in a few words, the landlord called the anser dioctyl the anser phthalate we generally called DOP, PVC material generally used, there is no instance of the application in PET and PET based on the characteristics of the melt point of view it is also not necessary plasticized. DOP does have some toxicity, but did not find the landlord WIKI page provided examples on the application of PET, but found "Proposed mechanisms include leaching of phthalates as well as leaching of antimony." One, which does not refer to the DOP , and should be PET residual monomer synthesis process, the synthesis of PET esterification of terephthalic acid and ethylene glycol, the need to keep the dehydration reaction was conducted, but this process is affected by the speed and the viscosity of the system interface to update the completely impossible, it may still remnants of the late reaction monomer or oligomer, but in these modern synthetic industrial residues is very small. Second, the heat resistant temperature of the PET by the process and measurement methods differ, the first PET bottle in the allowable temperature of not permit the temperature of the material, PET is a semi-crystalline plastic, and the cooling rate due to the different in the blow molding process molecular chain orientation will be part of the residual stress, these internal stresses when heated to a certain temperature, the bottle will deform, thus heating the water bottles shrink up easily become a group of small things bottle scrap, hot water splash something big. For PET is its high decomposition temperature, the material can be long-term use at 150 degrees Celsius, the anser the heat distortion temperature the anser of pure PET even at 1.85 MPa loads are up to 85 degrees Celsius (thermal deformation of materials testing methods the anser and standards varied, Vicat heat distortion the anser commonly used as an example, 5KG weights effect through a needle 1 mm2 cross-sectional area of the material, the material is heated the anser in an oil bath temperature constant speed, continuous action under the needle into the material 1mm is not deformed, have to say the test harsh conditions). So in terms of PET on the material more than enough to cope with the hot water, but due process limitations bottles, beverage bottles with a particularly thin-walled bottle of mineral water is completely the anser impossible for the installation of hot water, you can try, 500ml 100ml water bottle may eventually also used in the fit .......... Juice bottle wall thickness due to heat shrinkage less likely reasons, particularly opaque bottle finish, often heat treated (treatment crystallinity of the bottle rise, increasing the grain so opaque), the anser used equipment installed the anser hot water is no problem, the anser but because the bottle wall is thin, installed hot water is not good to take, or not recommended, but last semester dorm confiscated my electric blanket , throughout the anser the day I drink two bottles filled with hot water when a hot water bottle wrapped in layers of socks or a good drop with the results, but the next day it is the courage to drink inside had close contact with my foot in the water ....... the anser .... Also, if I'm really afraid that the leaching of phthalates do not drink bottled water or direct it, before you drink in the bottle for a few months, the beverage the anser liquid environment much more complex than water, Of course, do not drink cans filled with more, not God horse expert says could lead to leaching of aluminum ions Alzheimer's right, wow ha ha, do not live Genghen points altogether, breathing oxygen may lead to cellular oxidative aging, drinking the anser water intoxication may, again Now God horse can become allergens, live in the world is too dangerous ............. top [15] comment on this article reasoned, it is praise! However, because there are many types of plastic bottles, such as the following, do not rule out unscrupulous traders are not prepared; And although currently not found carcinogenic DEHP cases, but can not completely rule out such a suspicion, the anser such as cause testicular cancer. the anser Fortunately, the rumors of the hero is a girl, ha ha. PS: changed the subject proposal is better to "carcinogenic mineral water bottles do not mistake the object?." So narrow, it is connected with the head of the article content. ================= Link ================== "sign 1" PET: mineral water bottles, soda bottles carbonated beverage bottles . Logo Description: the anser Heat to 70 , only suitable for the warm drink or cold drink, put hot liquids or heating the deformation, the anser there are harmful substances melt out, is not suitable for recycling. "For 2" HDPE: cleaning supplies, bath products. Logo Description: the anser These containers are usually good cleaning, cleaning supplies tend to remain original, became a hotbed of bacteria, it is best not to recycle. "Sign 3" PVC3 Number: plastic bottles. Logo Description: Currently rarely used in food packaging, prone to harmful substances such material temperature, even in the manufacturing process it will even be released. "Was 4" LDPE: cling film, plastic film. Logo Description: Do not pack the food into the microwave the anser surface, LDPE heat resistance is not strong, qualified PE cling film melt phenomenon usually occurs when the temperature exceeds 110 in the case, will leave some of the body can not break down the plastic formulation. "5" PP: microwave meal, bottle the anser lunch box. Logo Description: PP is the only place in microwave plastic boxes can be reused after careful cleaning. But some microwave meal box body but to the 5th PP manufacturing, but the lid was to manufacture 1 PE, it can not be put in the microwave with the box body. "No. 6" PS: bowl of instant noodles box, snack. Logo Description: the anser This material is not put into the microwave oven can not be used mounted strong acid (such as orange juice), strong alkaline substances, the anser because the human body can not break down the polystyrene, are carcinogenic. Therefore, do not pack hot food. "No. 7" PC: water bottles, cups and bottles. the anser Logo Note: Currently the bottle material generally have PC, PP PES, and the latter two are free of Bisphenol A (BPA). PP material performance acid is much higher than the PC, PC materials such as stored in acid or alkaline environment will produce harmful substances. Top [7] Comments
5th floor of this article reasonable, great! However, because there are many types of plastic bottles, such as the following, do not rule out unscrupulous the anser traders are not prepared; And although currently not found carcinogenic DEHP cases, but can not completely the anser rule out such a suspicion, such as cause testicular cancer. Fortunately, the rumors of the hero is a girl, ha ha. PS: changed the subject proposal is better to "carcinogenic mineral water bottles do not mistake the object?." So narrow, it is connected with the head of the article the anser content. ================= Link ================== "sign 1" PET: mineral water bottles, soda bottles carbonated beverage bottles . Logo Description: Heat to 70 , only suitable for the warm drink or cold drink, put hot liquids or heating the deformation, there are harmful substances melt out, is not suitable for recycling. "For 2" HDPE: cleaning supplies, bath products. Logo Description: These containers the anser are usually good cleaning, cleaning supplies the anser tend to remain original, became a hotbed of bacteria, it is best not to recycle. "Sign the anser 3" PVC3 Number: plastic bottles. Logo Description: Currently rarely used in food packaging, prone to harmful substances such material temperature, even in the manufacturing process it will even be released. "Was 4" LDPE: cling film, plastic film. Logo Description: Do not pack the food into the microwave the anser surface, LDPE heat resistance is not strong, qualified PE cling film melt phenomenon usually occurs when the temperature exceeds 110 in the case, will leave some of the body can not break down the plastic formulation. "5" PP: microwave meal, bottle lunch box. Logo Description: PP is the only place in microwave plastic boxes can be reused after careful cleaning. But some microwave meal box body but to the 5th PP manufacturing, but the lid was to manufacture 1 PE, it can not be put in the microwave with the box body. "No. 6" PS: bowl of instant noodles box, snack. Logo Description: This material is not put into the microwave oven can not be used mounted strong acid (such as orange juice), strong alkaline substances, because the human body can not break down the polystyrene, are carcinogenic. Therefore, do not pack hot food. "No. 7" PC: water bottles, cups and bottles. the anser Logo Note: Currently the bottle material generally have PC, PP PES, and the latter two are free of Bisphenol A (BPA). PP material performance acid is much higher than the PC, PC materials such as stored in acid or alkaline environment will produce harmful substances. Top [7] Comments
9th Floor
2011-02-28 16:45 gatekeepers Lizi Wang cited respond Yamamoto truth: Quote Shyujikou's response: I think the article is the best reminder, do not store bottled drinking water in the summer of this car, because temperatures in summer car very high, probably over 60 degrees, long-term storage of bottled drinking water, the anser it may cause excessive release of DEHP. Interior temperature over ...... I feel he meant the car when no one is in the sunlight in general will have a very high temperature. Think about when you open the door during the summer feel ready to drive. In a sunlit interior temperature is very high indeed top [0] Comments plastic rubber as a research graduate students have to say a few words, the landlord called the anser dioctyl phthalate we generally called DOP, generally used for PVC materials, no In the example of the application of PET, and a melt point of view of its characteristics the anser plasticized PET is also not necessary. DOP does have some toxicity, but did not find the landlord WIKI page provided examples the anser on the application of PET, but found "Proposed mechanisms include leaching of phthalates as well as leaching of antimony." One, which does not refer to the DOP , and should be PET residual monomer synthesis process, the synthesis of PET esterification of terephthalic acid and ethylene glycol, the need to keep the dehydration reaction was conducted, but this process is affected by the speed and the viscosity of the system the anser interface to update the completely impossible, it may still remnants of the late reaction monomer or oligomer, but in these modern synthetic industrial residues is very small. Second, the heat resistant temperature of the PET by the process and measurement methods differ, the first PET bottle in the allowable temperature of not permit the temperature of the material, PET is a semi-crystalline plastic, and the cooling rate due to the different in the blow molding process molecular chain orientation will be part of the residual stress, these internal stresses when heated to a certain temperature, the bottle will deform, thus heating the anser the water bottles shrink up easily the anser become a group of small things bottle scrap, hot water splash something big. For PET is its high decomposition temperature, the material can be long-term use at 150 degrees Celsius, the heat distortion temperature of pure PET even at 1.85 MPa loads are up to 85 degrees Celsius (thermal deformation of materials testing methods and standards varied, Vicat heat distortion commonly used as an example, 5KG weights effect the anser through a needle 1 mm2 cross-sectional area of the material, the material is heated in an oil bath temperature constant speed, continuous action under the needle into the material 1mm is not deformed, have to say the test harsh conditions). So in terms of PET on the material more than enough to cope with the hot water, but due process limitations bottles, beverage bottles with a particularly thin-walled bottle of mineral water is completely impossible for the installation of hot water, you can try, 500ml 100ml water bottle may eventually also used in the fit .......... Juice bottle wall thickness due to heat shrinkage less likely reasons, the anser particularly opaque bottle the anser finish, often heat treated (treatment crystallinity of the bottle rise, increasing the grain so opaque), used equipment installed hot water is no problem, but because the bottle wall is thin, installed hot water is not good to take, but also
