Is the kraft paper lunch box eaten clean?

Whether the kraft paper lunch box is clean depends on the quality and use of the kraft paper.

If kraft paper is food grade, that is, it meets food safety standards, then it is perfectly okay to use it for rice, because it will not cause harm to the human body. In fact, many food packaging, such as McDonald's and KFC's hamburger wrappers, french fry bags, etc., are made with food-grade kraft paper, which is safe for direct contact with food.

However, if kraft paper is not food grade, which means that it may contain fluorescents, phosphors, or confetti, paper powder, etc., then it is best not to use it for rice. Because these substances may have adverse effects on the human body if they are ingested into the body.

In general, if you use food-grade kraft paper that meets food safety standards to pack your meals, then the kraft paper lunch box can be guaranteed to be clean. If it is not food-grade kraft paper, you need to carefully consider its safety.

Kraft paper lunch box rice is not no, it depends on what kind of paper it is, if it is food-grade kraft paper, it is no problem to directly connect with the meal, such as McDonald's KFC's hamburger wrapping paper, French fries bags, etc. are food-grade kraft paper, which can directly contact food If it is not food-grade, it is recommended not to contact paper products directly, because some kraft paper is fluorescent and has confetti paper powder

1.Low-density polyethylene is very versatile.

は pan, with squeezing.

The blow molding method can produce film and hollow DAO containers, the internal extrusion method can produce pipe materials, the extrusion calendering method can produce composite films based on kraft paper, and the injection method can produce various daily necessities, such as baby bottles, soap boxes, toys, cups, plastic flowers, etc.

Medium-density polyethylene is mainly used to make various bottle products, hollow products, cable products and high-speed automatic packaging films.

High-density polyethylene plastic has high strength and good wear resistance, so it is mainly used to make ropes, packing belts, etc., and can also be used to make boxes, barrels, thermos bottle shells, etc.

Flexible polyvinyl chloride can be made into a good agricultural film, commonly used to make raincoats, tablecloths, curtains, ticket holders, handbags, etc., and is also widely used in the manufacture of plastic shoes and artificial leather.

Rigid polyvinyl chloride can be made into transparent, translucent and pearlescent products of various colors. It is commonly used to make soap boxes, combs, washboards, stationery boxes, various pipes, etc.

2, PE, PVC itself should be colorless. Generally, colorants are added to plastics, and colorants are used for coloring plastics. It mainly plays the role of beautification and modification. About 80% of plastic products are colored into final products.

3. The plastic rope should be faded and lightened in the color of the high-temperature alkaline environment, and the color should be judged according to some of the properties they have.

Polyethylene chloride comes.

Ene itself is not toxic, it's just.

Since many material modification bai enterprises added processing aids du has some toxic zhi, now many dao polyvinyl chloride on the market is environmentally friendly and non-toxic food grade can be used to make drinking water pipes and dinner plates McDonald's, KFC's dinner plates are made of polyvinyl chloride and are not toxic Generally, like sewer pipes are also made of polyvinyl chloride That kind of material is not environmentally friendly Polyethylene is generally used to make plastic wrap Fresh-keeping bags are rarely used for cooking boxes Because of the high temperature of polyethylene, it is soft and unsuitable General plastic cups and lunch boxes are made of polypropylene What color would plastic rope of various colors be after being treated in an alkaline environment at high temperatures? It depends on what kind of plastic it is, how high the temperature is, like ordinary lunch boxes, polypropylene is no problem, acid and alkali resistance is better, polyethylene becomes soft when the temperature is high, polyvinyl chloride temperature resistance is also average, acid and alkali resistance is better.

How do you know bai

The lunch box is pe, you first look at a du

Is there such a number on the next zhi lunch box?

DAO. Special No. 1: PET

No. 2: HDPE

No. 3 :p VC

No. 4: LDPE

No. 5 : pp

No. 6: PS (Carcinogens are decomposed after alkaline substances.) Avoid packing piping hot food in fast food boxes. Don't microwave instant noodles in a bowl.

No. 7: Miscellaneous. Common kettles, space cups, baby bottles. Department stores often use water cups made of this material as gifts. It is easy to release the toxic substance bisphenol A, which is harmful to the human body. Do not heat when using and do not expose to direct sunlight.

I'm a bai person opinion 1 lunch box no.

All must be. Dupe made of PP is made of pp and the zhi lunch box of pp material is non-toxic dao.

2 Lunch boxes are generally not made of PE PE is generally used for blow molding containers, cups, plastic bottles, etc.

3. Colorless things must be no worse than colored things of the same material, colorless is the natural color of the material is not good adulteration.

4 Colored things are almost always with powder, masterbatch, or colorants, which are poisonous.

Generally pp and non-toxic.

Now the water is poisonous, so it is no longer poisonous.

We have a disposable lunch box every time we eat takeout, so it feels a pity to throw away this disposable lunch box every time, and it would be a good thing if we could use them all. Today, I will teach you how to make a plastic lunch box into a colored pen box that can be hung on the wall with colored pencils.

The tools we need to prepare are: plastic lunch boxes, paints, glue, colored paper, and cardboard.

First of all, we need to determine how many colored pencil boxes we are going to put on the background wall of this colored pencil box, and then decide how many lunch boxes to use according to the number needed. It is best to use a thicker lunch box, and after we get the lunch box, we will cut the lunch box first.

After cutting it out, it is mainly divided, a colored pencil box is a combination of a half-sided lunch box and a quarter lunch box, so we have to divide the lunch box into two and keep it for the first half of the pocket.

After one side of the lunch box is finished and wrapped in paper, the other side of the lunch box that has been cut in advance is used and the half-finished lunch box is buckled together to form a pocket shape. Of course, this half of the lunch box should also be colored or pasted with stickers, which is to facilitate the final coloring. In this way, make a few more of these pockets, and make a few of them if you need them.

When all the pockets are done, just like this, a total of 10 pockets are made on the background wall of this colored pen box, so that the staggered arrangement is also more beautiful, and it can be used as a decoration at home. If you think that the color of the kraft paper is old and beautiful, and you are looking for this style, then you can just paste them on the cardboard prepared at the beginning.

If you feel that the color of the kraft paper is relatively monotonous, you can also paste or write letters on it, and you can also paint these pockets with color, so that you can easily put the pen in! You can also put small tools such as rulers and tape. If you have children at home, you can play this handicraft!

Kraft paper has a Scandinavian flavor and is really popular at the moment. Now it has spread to many things, such as bags, floral decorations...As for the lunch box, it's hard to imagine.

Now the products should consider environmental protection, market, cost, and selling point.

The cost to consider, **may be a problem, degradable, but **not cheap.

Kraft paper lunch box.

The process of color printing is as follows:

1. Printing: Use an offset press to print the pattern onto the cardboard. Machines used: offset printing machines, often processed outside. Generally, it is more expensive, the domestic one is a lot cheaper, and the cheapest one is only tens of thousands per color, so it is not recommended.

2. Lamination: Glue a layer of plastic film to the surface of the cardboard to waterproof and brighten. Using the machine:

1) Water-soluble laminating machine, 2) Hot melt laminating machine. Some cartons do not need lamination. It is also tens of thousands of yuan, and the fully automatic one is expensive, with two or three hundred thousand yuan.

Laminating + film breaking machine.

3. Overlay: Glue the cardboard to the corrugated paper to become cardboard. Machines used: 1) glue machine, simple equipment, manual operation, thousands of pieces 2) semi-automatic cladding machine, automatic tile feeding, manual feeding cardboard, about 100,000, generally less than 100,000, 3) automatic overlay machine, more than 200,000, 4, die-cutting: the cardboard is pressed and cut into the target shape, and then used for molding. Using the machine:

1) Flat die-cutting machine (tiger mouth), different models, ** range, the general model is less than 50,000. 2) Circular die-cutting machine, fifty or sixty thousand, 3) Semi-automatic flat-flat die-cutting machine, about 200,000, a lot of difference, but fast and safe.

5. Forming: Cartons or nail boxes, or glued boxes, and processed finished products. 1) Nailing box machine, thousands of pieces, 2) Gluing machine. Different models are different**, generally tens of thousands of yuan, ordinary more than 10,000. 3) manual gluing, 4) automatic folder gluer, yellow board carton processing is relatively simple;

1: Open cardboard: order cardboard directly in the large line factory, the machine used: cardboard production line. To the site, to capital, an ordinary line in the million-800,000,000,000,2: printing slotting: print the required pattern on the machine, and crimping, slotting, and cutting corners. Machine: ink printing slotting machine, cheap and expensive can be more than n, the general investment is about 100,000, if you want to be fast, you want to be fully automatic ink printing machine.

3. Forming: The carton will be processed into finished products. 1) Nailing machine 2) Gluing machine 3) Gluing box by hand.

There are also general machinery, such as: paper feeder, quadruple slotting and corner cutting machine, baler, folder gluer, film breaking machine, blocking machine, dividing machine, thin knife machine and so on.

Personally, I think it is not feasible for Internet cafes, school guests are important, maybe not high-end lunch boxes, the important thing is convenience, for now you can design some environmentally friendly lunch boxes, add some creativity on it can be refreshing.

Mainly considering the customer base and purchasing power, high-end takeaway can not only be solved by packaging, but also has brand and product competitiveness. I've seen others do it before, and your immature customers suggest you think twice, because high-end means cost investment and high risk.