The use of plastic containers, cups and other plastic utensils in households is becoming more and more widely used, especially in the summer. How to choose materials and ensure safety? Senior engineer Wang Zhenhua said that the bottom of the plastic product has a triangle with an arrow. The recycling mark, which has a number in the middle of the triangle, is a plastic material code that can be used to select different plastic materials for different purposes.
"1" stands for PET (polyester): common in mineral water bottles, carbonated beverage bottles
This beverage bottle can be heat-resistant up to 70 °C, suitable for warm drinks or frozen foods and drinks, high temperature liquids or heating is easily deformed, harmful substances will melt. After 10 months of use, PET may be aged and release harmful substances. Therefore, when the bottle is used up, it should be discarded in time, and it should not be used as a cup or recycled for a long time.
"2" stands for HDPE (high density polyethylene): soy sauce bottle, oil bottle, cleaning, bathing product bottle
HDPE can be heat-resistant 100 °C -120 °C, used for food packaging is generally used to manufacture large-capacity containers, turnover boxes, turnover barrels, etc., with good environmental adaptability.
"3" represents PVC (polyvinyl chloride): medicine bottle, storage bottle
PVC plasticizers without plasticizers are used for pipes, doors and windows, and for small quantities in food and pharmaceutical packaging.
"4" stands for LDPE (low density polyethylene): yogurt bottle, chewing gum bottle, beverage bottle
LDPE is a general-purpose plastic with a low processing temperature. Generally no additives are added. It can be used to make a variety of containers, but the use temperature cannot exceed 80°C.
The only plastic box that can be placed in a microwave can be reused after careful cleaning. Need special attention, some microwave lunch boxes, boxes made of PP resin, but the lid is made of PE, because PE can not withstand high temperatures, so can not be put together with the box into the microwave oven. To be on the safe side, remove the lid before placing the container in the microwave oven.
"6" stands for PS (polystyrene): instant noodle box, snack box
PS is good for heat resistance, cold resistance, and impact resistance, but it cannot be put into the microwave oven for heating to avoid release of low-molecular chemicals due to high temperatures. It is not suitable for holding strong acidic substances (such as vinegar, orange juice), and easily decomposes harmful ingredients at high temperatures.
"7" stands for PC (polycarbonate): kettle, cup, pure bucket
Advertising coffee paper cups are a form of advertising that is highly accurate and effective. It is conceptually a kind of practical advertisement. Practical advertising is the use of articles with practical functions as advertising carriers for advertising and distribution. The purpose is that while the practicality of the carrier itself is being realized, the advertising that is attached to it can also be demonstrated, and eventually it will reduce the acceptance rejection and evasion brought about by a single advertisement, and realize the flexible dissemination of advertisements. This type of advertisement is particularly effective today when advertisements are flooded and people suffer severe psychological conflict and visual boredom. Therefore, advertising coffee paper cups generally have five major advantages:
1, practicality, advertising is more easily accepted;
2. Mandatory, printed on the cup, with coffee paper cups, intentionally or unintentionally always seen;
3, low consumption, has practical value, ornamental value, can be reused, will not be discarded at will, advertising efficiency rate is higher;
4, targeted, one-on-one, more direct;
5, can be monitored, the introduction of delivery receipts, monitoring the entire process, the effect of timely full feedback.
The following are fundamental and systematic. Details ensure the feasibility of coffee paper cup advertising:
1, coffee paper cups are daily necessary supplies, and very few people refuse to accept;
2. The coffee paper cups currently on the market are monotonous in color, simple in design, and not aesthetically pleasing. The placement of advertisements will give people a fresh feeling.
3. In terms of cost control, the overall investment in the design, production, and delivery of advertising coffee paper cups is very obvious compared to other media.
Advertising coffee paper cups are mainly suitable for the following industries 1. The real estate industry: Basically, each development company and agency company will use advertising coffee paper cups with their own logo, and then each project will also do coffee paper cups for the project, especially before the opening, and the amount is not small;
2. Decoration and building materials industry: These industries are now generally more profitable and competitive, and they place more emphasis on corporate image.
3, furniture brands and furniture stores: These are often advertised coffee paper cups;
4. Advertising company: This kind of company must do it. He was originally advertising.
5. Herbal Tea and Soybean Milk Stores There are also beverage companies, beauty and hairdressing industries: this industry is profiteering, and such guests have high price demands;
6, telecommunications, mobile and other enterprise groups: their institutions are large, so a lot;
7, government departments: They have such office expenses, so find them right.
At present, advertisers or manufacturers also use paper bowls as an advertising medium.
Designing the pattern on the cup body can give people different drinking moods, and it is also a "symbol" for promoting a certain product. Because the product's trademark, name, manufacturer, distributor, etc., can be designed on the surface of the paper cup. When people drink beverages, they can get acquainted with the information and understand the products. paper bowls provide a platform for people to understand these new products.
Second, compare the printing methods of paper bowls
paper bowls have a variety of printing methods, and different printing methods have different printing characteristics.
Offset printing
Offset printing is the principle of using oil and water repulsion.
Film propaganda paper bowls are oil-resistant and water-resistant. The blank part is hydrophilic and oil-resistant. The images are transferred to the printing materials through a blanket cylinder. The advantages of offset paper bowls are full, vivid, and high definition. No matter whether it is a gradual change or a fine and fine line, it can be clearly displayed, making the appearance of the paper cup more beautiful and attracting the eye of the customer. But offset printing is not suitable for printing edible paper bowls, because offset printing inks are not very environmentally friendly.
2. Silk screen
Screen printing is flexible and flexible due to its flexibility and applicability. It is not only suitable for printing on soft articles such as paper and cloth, but also suitable for printing on hard articles such as glass, ceramics, etc., and is not limited by the surface shape and area of ??the substrate. However, the advantages of screen printing paper bowls cannot be well represented, and screen printing has great restrictions on the reproduction of graphics and texts, and it is difficult to deal with gradual changes and the accuracy of reproduced images.
3. Flexo
Flexo printing is called "green printing" due to the use of water-based inks. Many of the company's product packaging are now developing toward flexo printing.
Because the structure of the flexo printing machine is relatively simple, compared to the large body of the offset printing press and the high cost of materials, the flexo printing machine becomes "thin". In terms of cost, the equipment investment of the flexo printing machine is lower than that of offset printing machines of the same scale, and generally can save as much as 30% to 40%. The small investment in production has attracted the participation of small-scale printing companies. Flexographic printing is not as narrow as the screen printing in the selection of originals, and the rules on color are broader, but they are inferior to offset printing. Flexo printing is the main process currently used for paper cup printing. The print quality of paper bowls depends largely on prepress production. We will now elaborate on the issues that should be noted in prepress production.
Experts point out that toxic components can easily enter the water
Banks, shops, airplanes, trains, ships, offices, etc. Almost all public places need to drink water and food. There are paper cups in many places. Even in most consumer homes, the original ceramics and glasses are replaced by paper cups, especially for use. Paper cups to entertain guests have become the method approved by most citizens. However, what is the quality of paper tableware? If it fails, will it endanger the health of consumers?
Recently, the International Food Packaging Association conducted investigations on disposable paper cups sold in some large supermarkets in Beijing, Shanghai and Dongguan. Of the 25 paper cup samples sampled, 11 were unqualified. Experts said that the main reason for the lack of cup stiffness is that enterprises use waste paper to reduce costs. They may also use too wet paper or too thin paper, and the direct consequence is that the cup is susceptible to leakage and deformation. , It is easy to burn the user and even cause harmful ingredients to enter the water.
China consumes about 20 billion paper cups each year
It is understood that the International Food Packaging Association had conducted investigations in 2011 on disposable cup products sold in some supermarkets and agricultural wholesale markets in Beijing, Tianjin and Hebei. The survey found that the information on the unlicensed products sold in the farmers' market was unclear, the raw materials of the products were unknown, and even after some products were unpacked, the cups were brightly colored and yellowed; some products were very white in color and were added during the production process. The fluorescent whitening agent with potential carcinogenic effect; disposable cup market mixed, companies implement the industry standard QB2294-2006 "paper cup", and the industry standard does not require ink, some companies use benzene, toluene and other toxic solvents Do ink printing paper cups. China has implemented the market access (QS) system for paper cups, paper bowls, and paper lunch boxes in 2008. Enterprises that produce food contact paper can only produce products that have passed the production license issued by the National Quality and Technical Supervision Department. And sales.
The reporter learned from the official website of the State Administration of Quality Supervision, Inspection and Quarantine that as of the end of July 2012, there were more than 700 manufacturers of paper cups, paper bowls, and paper lunch boxes that had obtained effective production licenses, most of which were paper cups and had more than 600 companies. In addition, many companies do not apply for production licenses still in production, so the actual number of production companies is far greater than the above data. According to relevant investigations, at present, the usage of paper lunch boxes in China is about 1 billion, the amount of paper bowls is about 10 billion, and the amount of paper cups is about 20 billion.
Nearly half of the sample cups and cups are not stiff enough
From May to August 2012, the International Food Packaging Association formed a survey team to investigate disposable cups in Beijing, East China (Shanghai, Zhejiang) and South China (Guangdong). According to the test results, 11 cups of the 25 paper cups under investigation failed the cup body stiffness. Among the 11 unqualified samples, the disqualified rate of paper cups and cups in farmers' markets was significantly higher than that of supermarkets. According to the relevant person in charge of the investigation team, the main reason for the lack of cup stiffness is that enterprises use waste paper to reduce costs. They may also use too wet paper or too thin paper. The direct result is that the cup is too soft to use. Inconvenient, easy to leak and deformation, easy to burn the user, and even harmful components into the water to produce toxic and harmful smell gas.
Paper cup certificate with high phosphor content
During the investigation, the investigation team found that the small labels on the certification labels of paper cups, paper bowls, and other products had very high levels of fluorescent substances, and all exhibited very bright blue fluorescence under ultraviolet light at 365 nm and 254 nm wavelengths. The labels of paper cups and other paper products are generally placed in direct contact with the inner wall of paper cups on the inside of the paper cup. The fluorescent substances on the certificate may enter the human body through the inner wall of the paper cup and contained food or drink, causing harm to the human body and causing cancer risk. .
According to the relevant person in charge of the investigation team, at present, China's national standards do not stipulate the certification of food and beverage tableware and label materials. Therefore, the production company has not strictly selected the certification paper, which is extremely bright. The blue fluorescent paper is likely to be industrial paper, even a low-cost recycled paper.
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