​Quickly identify PCB green product identification

Quickly identify PCB green product identification

   Preface On 13 February 2003, the Official Gazette of EU 137 published the Waste Electrical and Electronic Equipment Directive (WEEE 2002/96 /EC) and the Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (ROHS 2002/95/EC) jointly approved by the European Parliament and the Council of Ministers of the European Union. The two directives are the eu's new measures in the field of environmental protection. The former directive not only makes special provisions on the recovery and treatment of discarded electronic and electrical equipment, but also stipulates that the recovery costs should be borne by the producers. The latter directive requires that the sale of electronic and electrical equipment containing six hazardous substances, including lead, be banned in the EU market from July 1, 2006. Both directives reflect the trade policies of developed countries that the opening of the market to the outside world is a prerequisite, which in addition to meeting various technical standards. It also needs to meet labor and environmental standards. The two directives will enter into force after 13 August 2004. Its application includes household appliances and so on.

1, understand the limit with metal and material is based on the analysis of its potential harmfulness to human body.Six kinds of hazardous substances in 1.11.1.1B (Pb)High hazardous substances, mainly in the form of dust and smoke enters the body through the respiratory and digestive tract. The respiratory tract absorb quickly, about 20 ~ 30% into the blood circulation, through the digestive tract absorb about 5-10%. Some studies showed that lead is toxic, damage to the replication of human body function, and accumulate in the body, cause neurological disorders, adverse effect on the blood system and kidney; At the same time may pollute water, soil and air.

2.(Cd)Cadmium is a by-product of zinc extraction. It is mainly used for electroplating and the manufacture of alloys, solders, dyes and pigments, as well as the stabilizers of plastics. There is no such plating in PCB industry. Studies have shown that cadmium can cause renal system disorders, resulting in human osteomalacia, joint pain, bone removal and bone deformation, and affect the effectiveness of beneficial elements in human body, resulting in liver and kidney damage, emphysema, respiratory tract, endocrine, vascular fatty diseases, is a carcinogen, and induce prostate cancer.

3 (Hg)Metal recorded in the form of steam by respiratory tract enters the body, the skin can absorb less, but the skin damage absorbed more; The digestive tract absorption; Mercury vapor is easy to enter the body through the alveolar membrane and soluble in the blood, it is found in the kidney, and through the blood brain barrier into the brain tissue. It inhibits the body protein enzyme system function, and lead to an allergy, nephrotic syndrome, cause human body immunity damage, central nerve damage, pulmonary function, failure, and cause reproductive dysfunction.

4 Chromium hexavalent (Cr6+) is banned in the European Union because of its carcinogenic or mutational properties. Cr6+ is often used as chromic acid in the electronics industry.Cr6+ is human poison ingestion/inhalation, skin contact may cause sensitization; More likely to cause inherited genetic defects; Inhalation is carcinogenic and has lasting harm to the human body, but metallic chromium, trivalent or tetravalent chromium does not have these toxicity.

5 more desert biphenyl/bromine biphenyl etherProduce dioxins has extremely high toxicity, and very stable to belong to a class of carcinogens, since it is extremely difficult points, the body cannot discharge after intake, thus a serious threat to human health.

6.the big six harmful material harmBrominated flame retardants PBB and PBDE in the case of incomplete combustion, will produce toxic dioxinsDioxin mechanism of its harm to people's health is roughly four aspects: (1) production similar to the role of endocrine hormone in the body.(2) destroy the normal endocrine hormone secretion in the human body.(3) damage human body endocrine hormone synthesis and metabolic process.(4) synthesis and metabolic process of endocrine hormone receptors.Results in the decrease of the body's immune function, reproductive and genetic function change, malignant tumor susceptibility, etc.This focus on these substances, pay more attention to our environment, pay more attention to our health.

7, halogen free and lead free and restricted, and the understanding of the disabledROHS directive restricted, is to ban the use of six major harmful material, it should be the correct understanding of instruction meaning

(1) it is prohibited to use:Prohibited to use a particular chemical, exists in the form of impurity content is allowed, but limit the will be used for the concentration of impurity content.2.1 lead limit < 100 PPM lead-free2.2 R value < 5 PPMThe allowable value of 2.3, 1000 parts per million2.4 limit of 1000 PPMThe PDD / 2.5? BDER fixed value 1000 PPM2.6 halogen free chlorine (C1) (Br) is less than 0.09% (wt)

The allowable value of 2.7In November 1999 by Japan's printed circuit industry (IPGA) has released, implement the standards of six kinds of halogen-free copper clad laminates, this is the world's first operation standard of halogenated copper clad, in this series of standards, for the first time, the copper clad '" halogen free features made definition: chlorine or bromine content is less than 0.09 wt % this definition standard, after the European Union Such as the United States in drafting related or similar standard reference; IEC standard also defines the income range 1 2000 IPC IPC - 4101 issued by the rigid and multilayer PCB base material specification standard also contains the halogen free standard IPC - 4101/92, 3, 94, 95

(2)Rsystem use:Allows to use a particular chemical or allowed to contain a large amount of impurity content in the form of, its usage or contained use restrictions have certain restrictions on use.Contains management:Allows to use a particular chemical, not to limit its content, but need to report its content, contains parts and contains the information such as purpose of use.

(3) six material CP test methodsSix major material to many detection methods can be divided into soluble and insoluble testing methods, when send test need to clear detection method, otherwise regarded as invalid,

(4)PCB product how to apply for a test4.1 raw materials and raw materials manufacturers to provide products of ICP test report (report is content with the raw material list - corresponding, valid for 1 year). The CP test reports shall be recognized by third parties.