How to choose and identify disposable cups, bowls, plastic cups Material
Equipment, technical director of scientific research laboratory material properties testing center, senior engineer Wang Zhenhua, asking him to make a presentation on relevant knowledge.
● disposable cups
Fed senior told reporters, disposable paper cups use can be divided cold cups, hot cups and ice cream cup. Can be divided according to constitute wax cups and lamination Cup. Paper cups are paper used for food packaging, that is pure pulp production, can not use recycled paper. To prevent the leakage can be a coating or lamination process. Usually cold cups can be made of food grade paraffin wax coating on the inner, lower heat resistance, heat resistance temperature should not exceed 40 ℃; currently fewer waxed cup, gradually replaced by double lamination Cup. Ice cream cups of hot water or oil-containing coated paper cups used, i.e., pouring a layer of paper coated with plastic film, usually polyethylene (PE) film, high heat resistance, heat-resistant temperature of 80 ℃. Using double lamination, ie cups attached to the inner and outer layer of each PE lamination, very real degree and anti-permeability is better. More common is domestic PE coated paper cups, more developed foreign PLA (polylactic acid) Paper Cup, security and good degradation. Consumers should note that due to PE lamination withstand temperature is 80 ℃, so it is best not to directly blooming tea with cups of water, you can use other high-temperature vessels after tea, using tea cups dress warm.
When consumers choose disposable cups, no microbiological, physical and chemical testing equipment, but can see, smell, photos, pinch and other steps to determine the quality of the sensory cups security eligibility.
Selection of qualified cups, paper cups first look at whether the packaging above QS production license logo, manufacturer information and date of manufacture. In addition Scope indicated on the packaging but also to see, regular disposable cups are marked cups suitable temperature.
Then look at the appearance of paper cups, paper cups cup should not sag, wrinkle; lamination layer of wax layer should be uniform, and the cup itself should be clean and free of foreign matter. Cups printed appearance pattern, color is more simple, the better. Printed pattern should outline a clear, uniform color, no stain. According to recommended national standard beginning June 1 this year to implement the provisions of "cups" (GBT 27590-2011), the cups cup cup body within 15 mm from the bottom of the cup from the cup body should be within 10 mm print. Although because of protective lamination ink composition will not necessarily be brought to the food, but choose the cup bottom of the cup or cups without printing will be more secure.
Open cup packaging, smell the smell of paper cups, paper cups should be no odor qualified. Unqualified cups, such as the use of industrial paraffin, lamination did not use food-grade instead of using non-food-grade recycled PE, there might be some instability in the low molecular weight components freed, releasing the odor, if dressed hot water, the smell may be more obvious, such a situation should be treated with caution.
National standards for paper cups have cup body stiffness and strength requirements bottom of the cup. Material is very soft, slightly pinch flat cups, there may be shoddy products, not easy to use, the use of such cups hot water then easily cause burns and other injuries.
Paper cups are not allowed to use fluorescent brighteners. Using recycled paper products because some unscrupulous manufacturers, whiteness is not enough, join fluorescent brighteners purported former pulp and paper use. Although there is no proof fluorescent absorbs much harm to human body, but the fluorescent agent has been identified as one of the potential carcinogens. If containing fluorescent substance emits blue fluorescence by ultraviolet irradiation will, consumers can take advantage of this principle can emit UV money detector pen preliminary validation. Although in the case of lamination under fluorescent agents tend not to penetrate quickly migrate to the food, but there are still potential hazards, according to the standard, if the area of the cup body to fluoresce more than 5%, the product is substandard.
● plastic utensils
Household plastic crisper, cups and other plastic containers used more widely, particularly more common in the summer, how to choose the right materials to ensure safe? Fed senior engineer, said the bottom of the plastic products have a triangle with arrows recycling mark, there is a triangle in the middle figure, which is a plastic material code, can be selected according to the number of different materials of plastic utensils used for different purposes.
"1" represents PET (polyester): common in mineral water bottles, soda bottles
This drink bottle can heat to 70 ℃, suitable for loading warm drink or frozen food products, hot liquids or heating equipment is easy to deform, harmful substances will melt out. PET 10 months after use, possibly aging, releasing harmful substances, so the bottles should be discarded run out, not to be used as cups or prolonged recycling.
"2" represents HDPE (High Density Polyethylene): soy sauce bottle, oil bottle, cleaning, bath products bottles
HDPE can heat 100 ℃ -120 ℃, used in food packaging is generally used to manufacture large-capacity containers, crates, barrels and other turnover, with good environmental adaptability.
"3" on behalf of PVC (polyvinyl chloride): bottles, bottle storage
Without hard PVC plasticizers, used to make pipes, doors and windows, a small amount for food and medicine packaging.
"4" represents LDPE (low density polyethylene): yogurt bottles, chewing gum bottles, beverage bottles
LDPE is common plastics, processing temperature is low, generally without additives, can produce a variety of containers, but the use of temperature should not exceed 80 ℃.
"5" on behalf of PP (polypropylene): crisper, microwave meal
The only place in microwave plastic boxes can be reused after careful cleaning. Require special attention, some microwave meal, box with PP resin, but the lid is PE manufacturing, due to the PE can not withstand high temperatures, and therefore can not be put in the microwave with the box body. For insurance purposes, the container into the microwave before, first remove the lid.
"6" on behalf of PS (polystyrene): boxes of instant noodles, snack
PS heat, cold, impact resistance is good, but not put in the microwave, so as to avoid high temperature and release of low molecular weight chemicals. It does not apply to bloom strongly acidic substances (such as vinegar, orange juice), easily decomposed at high temperatures harmful ingredients.
"7" on behalf of PC (polycarbonate): water bottles, cups, clean buckets.