【導讀】和眼睛有害，還可以影響免疫系統。紫外線輻射誘導生物組織發(fā)。生光化學反應，發(fā)生職業(yè)傷害的紫外線危害可以是暴露于自然和人工紫外線輻射光源。限值顯示，幾乎所有的人可能會有反復無急性的表現。新的標準在健康和安全方面。對工人有要求，暴露風險的措施保護與非常必要。但是，并沒有強制性的紫。外線暴露限制值。陽輻射的紫外線范圍介于290和400納米之間的最大輻射290到310納米。水平取決于地理位置，海拔高度，一年的時間內平均云層和大氣傳輸特性的時間。但對于白色和淺色PLA紡織品而言，紫外線的透過率較高，有損人體健康。此外，KMogi等人采用滌綸用的苯并三唑型紫外吸收劑對PLA織物于100℃浸漬處理，目前，有關滌綸織物紫外線防護整理和紫外線吸收收劑整。理的研究已有大量文獻報道，但對PLA織物的相關報道極少。浴比1∶50，60℃處理45min。采用氯仿室溫溶解經紫外線吸收劑處理的試樣，所得溶解液在最大吸收波長。因此，在使用時，應采用110℃保溫處理。

　　

【正文】 n the closing date and received a detailed discussion ments, please visit the ACGIH Web site (: PP. Acgih. ) ACGIH39。s TLVPBEI making process. 3, the classification of the relevant physical factors TLVs TLVs physical factors include: (1) timeweighted average threshold limit value 2 (TLV2TWA), suitable for 8h days, 40h working week timeweighted average exposure。 (2) Threshold Limit Value 2 upper limit (TLV2C), that moment can not exceed the exposure limits. Physical factors of the carcinogenic 4 physical factors TLV (TLV2PA) The Committee remended the adoption of necessary threshold level by the chemical carcinogen classification established by the Committee. 5 physical factors and chemical factors in the workplace between the bined effects of physical factors, and physical factors and chemical interactions that may increase the body39。s stress (stress) that changed the level of contact with the body effect in the TLV. Produce the joint effect of physical factors such as heat, ultraviolet and ionizing radiation, humidity, abnormal pressure (altitude) and other physical factors. This stress may enhance the body39。s external source material adverse toxicity. Although most of the TLVs contains a number of uncertainties in order to prevent middleoffset normal workplace adverse health effects, but for most of the contacts, the uncertainty has not yet reached the extent to offset the total deviation. In this case, should be appropriate to adjust the TLVs by experienced professionals to make judgments. Introduction to physical factors related to TLVs 6 TLVs of each based on physical factors of the different health effects, are summarized below. Acoustic TLVs Acoustic TLVs including infrasound, low frequency sound, noise and ultrasound TLVs. Infrasound and low frequency sound TLVs that almost all workers other than repeated exposure does not cause adverse health effects of hearing level。 noise TLVs that nearly all workers do not cause hearing loss or repeated contact with normal language prehension and exposure to harmful effects of continuous sound pressure level time。 ultrasound TLVs refer to almost all workers hearing repeated exposure does not cause adverse effects or normal conditions of language prehension. Ergonomics TLVs related to physical factors Ergonomics TLVs including the hand activity level, lifting, arm (local) vibration and body vibration of the TLVs. Hand activity level TLVs represent almost all the workers repeated exposure does not cause adverse health effects of conditions。 lifting TLVs proposed lifting the workplace conditions, in this condition, almost all workers can not repeated daily exposure job generation and repeatedly lifting the back and shoulderrelated diseases。 arm (local) ponent of the acceleration vibration level TLVs refer to axial and exposure duration, in such conditions, almost all workers can 9 not develop into repeated contact classification system than the first Stockholm Conference on the vibration of white finger (vibration2induced whitefinger, VWF), also known as occupational Raynaud39。s phenomenon (Raynaud39。sphenomenon of occupational origin)。 whole body vibration whole body vibration TLVs mechanical means (WBV) axial RMS acceleration ponent size and duration of these conditions, almost all workers can be repeatedly exposed, but the cause back pain, back adverse health effects and the risk of driving is not the normal minimum. Laser radiation TLVs refer to almost all workers can be repeatedly exposed without adverse health effects of exposure levels. Heat stress TLVs TLVs, including heat stress and cold stress TLVs heat stress and heat stress response TLVs. Cold stress TLVs to protect workers from cold stress (hypothermia) causes the most serious effect and cold injury, and describes almost all workers can be repeated without causing adverse health effects of exposure to cold operating conditions。 heat stress and heat stress response TLVs are described in almost all amount of drinking water, no medicine, and health workers can be repeated without causing adverse health effects of exposure conditions.