Classification of coated paper, difference between coated paper and aluminum foil paper

Understand the waste products** on the waste home, your questions I come].

Coated paper is a composite material that coats plastic particles on the surface of the paper through a casting machine, and the main feature is that the composite material can be oil-proof (relative), waterproof (relative), and heat-sealed.

The classification of coated paper can be classified according to plastic release paper and non-plastic release paper; Silicone release liners and non-silicone release liners can also be classified by release agent.

There is plastic coated paper, because the release agent has a certain permeability, if there is no certain barrier, the release agent will penetrate into the inside of the paper, resulting in poor curing and the use of release agent is too large (the cost is too high) and many other undesirable factors. Therefore, it is necessary to do plastic coating treatment on paper (commonly known as coating), and polyethylene (PE) particles are generally used for coating in China, requiring a melt flow index of about 7, and domestic PE particles are generally selected from 1C 7A of Yanshan Petrochemical. It is divided into single plastic release paper and double plastic release paper; Plastic-free release liners, mainly glasing, CCK and other special treatment release papers.

In addition, there are some release liners that are widely used in many industries, and there are also those that do not use release agents. For example, label printing factories often apply a layer of varnish where there is a need for release, and it will also have a certain release capacity, of course, the performance of the glue is very weak. Otherwise, this bit of detachment ability is also in vain.

Others, using some special glues and other formulations, produce release liners that account for a small share of the overall market.

The electronic industry uses less first-class paper (released liner produced by regular factories with stable quality and quality assurance), mainly garbled paper (release paper that has been used once abroad, or has quality defects). The gluing plant basically uses ** paper.

1): By Color:

a, monosilicon white release paper, refers to one side of plain paper, one side of silicone oil. More commonly used.

b,,Monosilicon yellow (blue) release liner refers to a release paper that is yellow (blue) on both sides.

2): By gram weight: from 35 grams to 250 grams (can be higher).

3): According to whether silicone oil is added or not, it can be divided into silicone oil paper and coated paper.

Note: Coated paper is only the bottom paper and coated paper, if it is silicone oil paper, it means that there are three kinds of paper.

4), according to the single and double-sided.

a, double silicon single seal, refers to one side of silicone oil, one side only coating, this kind of cleanliness will be improved.

b, double silicon, refers to silicone oil on both sides.

c, monosilicon. d, coated paper, can also be called white plastic paper.

5): According to the production place of product materials.

A: Domestic. B: Imported.

The difference between composite paper and coated paper is:

1.The difference between the composite paper bonding material and the coated paper bonding material;

2.The use of composite paper and coated paper is also different, 3Composite paper and coated paper will have different effects after processing or in the middle of the process.

Composite paper is to use adhesive to laminate paper, cardboard and other plastics, aluminum foil, cloth, etc., to obtain composite processing Sun Selling Calendar Paper.

Composite processed paper can not only improve the appearance and strength of paper and cardboard, but also improve the performance of waterproof, moisture-proof, oil-resistant, airtight and fragrant, and at the same time, it will also obtain heat sealability, light resistance, heat resistance, etc.

Coated paper is a composite material that coats the surface of the paper with plastic particles through a casting machine, and the main feature is that the composite material can be oil-proof, waterproof (relative) and heat-sealed. Different uses take their different characteristics: When using the ingredients in the packaging of food, take its oil-repellent characteristics.

When used for coated paper packaging, it is searched for its waterproof characteristics. When used in automatic packaging machine packaging, take its heat-sealable characteristics.

1. Shanghai Shengzhu packaging productsMain products: The company specializes in the production of various specifications of kraft paper bags, paper-plastic composite bags, square bottom valve bags, square bottom open bags, laminated bags, PE inner film bags, coated cloth.

2. Zhongshan Fuzhou adhesive products.

Sticking paper, sticking film, sticker, coated paper, release paper, glue, glass cardboard.

3. Nanjing Saute packaging products.

Main Products:Plastic Packaging; paper cup production; coated paper production; PE film production.

4. Yichang Jixing Paper Industry.

Main accompanying products: production, processing and sales of coated paper and paper products.

Date of establishment: 2002-12-13.

Coated paper production details:

Coated paper: is in the case of various kraft paper as the base paper, the hot melt PE plastic particles are evenly coated on the surface of the paper on a variety of kraft paper, so as to form coated paper, compared with ordinary paper, coated paper has the characteristics of waterproof, oil-proof, etc., and PE plastic particles are composite materials, with oil-proof, waterproof and heat-sealing, etc., but when used in different industries will take its different characteristics, when packaging food, it will automatically take its oil-proof characteristics, when used for the packaging of coated paper, Take its waterproof characteristics, and when it is used for automatic packaging machine packaging, take its heat-sealing characteristics.

Coated paper is used in the industry:

The applicable industries of coated paper: electronics, laminated coated paper, automotive foam, printing, etc., most of its use range and.

Sticky clumps, especially adhesive tapes. Therefore, release liners are generally used in products that use adhesive tape.

Lifestyle: wet wipes bags, edible salt packaging, paper cup paper.

Food: noodle strapping, ice cream packaging, milk powder packaging, tea packaging, melon seed bags, bread bags, hamburger packaging.

Sugar packaging, coffee packaging bags.

Wood products: tongue depressor packaging, ice scoop packaging, toothpick packaging, cotton swabs.

Paper: coated paper packaging, lightly coated paper packaging, copy paper (neutral paper).

Chemicals: desiccant packaging, mothballs, laundry detergents, preservatives.

Pharmaceutical packaging: medical equipment packaging, traditional Chinese medicine packaging, veterinary drug packaging.

Others: test paper, aviation bag, seed bag paper, bearing packaging, stainless steel material packaging, can be done after silicon coating.

Rubber bottom paper, kraft paper tape, women's products, anti-rust oil for anti-rust packaging, disposable travel products.

(1) Glassine (the bottom paper is Glassine) silicone oil paper: high temperature resistance, moisture-proof, oil-proof, generally used in food industry packaging.

2) Ordinary release paper: moisture-proof, oil-proof, play a role in product isolation.

4. Applicable industries: electronics, automotive foam, printing, etc., most of its use range is particularly sticky together, especially adhesive tape. Therefore, release liners are generally used in products that use adhesive tape.

Scope of application of coated paper:

1) Chemicals: desiccant packaging, mothball, laundry detergent, preservative.

2) Food.

3) Wood products: tongue depressor packaging, ice scoop packaging, toothpick packaging, cotton swabs.

4) Paper: coated paper packaging, lightly coated paper packaging, copy paper (neutral paper).

5) Life: wet wipes bags, salt packaging, paper cup paper.

6) Pharmaceutical packaging: medical equipment packaging, traditional Chinese medicine packaging, pesticide packaging, veterinary drug packaging.

7) Miscellaneous.

First of all, let's take a look at the difference between ordinary plastic film and release film, cut off a piece of tape, stick to these films respectively, and then peel off, it is easy to uncover the feel, in the process of unmasking, there is no sound, that is, the release film coated with silicon, and it is more difficult to uncover, and there is a squeak in the process of unveiling is the ordinary plastic film that has not been coated with silicon. In this way, you can also distinguish whether it is a single-silicon release film coated with silicon on one side or a double-sided silicon release film coated with silicon on both sides, and even compare the amount of silicon coated on which side and the size of the peeling rate. Another method is to use a pen to detect, scratch on the surface of the film, no ink can be scratched on the surface of the release film, and there will be ink marks of different shades on the ordinary film.

It is also not visible in the appearance of the plastic release paper and the coated paper of the same specification, but the difference between the two can also be distinguished by the above method. Glossy plain paper and coated paper sometimes look similar, but if you tear them by hand, ordinary paper will only have fiber hairs at the edges of the torn, while coated paper will have some small diaphragms in addition to wood fibers. If you test with adhesive tape, there will be a sound on the coated paper during the process of removing the tape, but nothing will stick to the tape, while the shiny plain paper will stick to the coating and wood fibers on the surface of the paper.

Sometimes, it is difficult to distinguish between a silicone-coated glassine release liner and a normal coated silicone release liner of the same size and color on the table, and they also have the same release characteristics. But glassine paper is made of high-pressure light, so the paper is more uniform and flat, and generally more transparent, so you only need to look at the transparency and uniformity of these two similar papers against the light, it is easy to distinguish, it is really not good, just tear it by hand, and the film fragments can be seen is the coated paper. Glassine release liner with high transparency.

The technical indicators of coated paper are as follows: dry silicon coating amount, peeling force at room temperature, aging peeling force and residual adhesion rate.

The amount of dry silicone coating is the amount of release agent applied to the material, measured in grams per square meter. Generally, the coating amount of solvent-based silicone oil is from grams per square meter, and the coating amount of solvent-free silicone oil is from grams per square meter. Specialized testing equipment is required to test the coating amount.

The amount of silicone oil applied has a direct impact on the peel properties. The high coating weight can cover the base paper densely and ensure the uniform distribution of silicone oil. However, the lower the amount of silicone oil coating, it is easy to miss the coating, resulting in poor peeling.

Some release coaters reduce the amount of silicone oil coating, resulting in heavy peeling and producing heavy release paper, which is quite risky when used. A reliable manufacturer adjusts the peel force by adjusting the chemical formula without reducing the amount of silicone oil coated. This requires a long period of technical accumulation, not overnight.

Peel force at room temperature, the peel force data obtained by standard test methods at room temperature, in the unit of n 25mm, can be converted into how many grams. Generally, that is, the peeling force below 10 grams, commonly known as light peeling; , that is, a peeling force of less than 20 grams, commonly known as medium peeling; , that is, a peeling force of 35 45 grams, commonly known as heavy peeling; , that is, a peeling force of 60 80 grams, commonly known as heavy peeling; Of course, there are, that is, a peeling force of 3 or 4 grams, commonly known as gentle peeling; There are also, that is, peeling forces of more than 100 grams, commonly known as overweight peeling.

Peeling force after aging, the peeling force data measured after aging, is generally slightly larger than that at room temperature.

The residual adhesion rate refers to the force of the release paper after the first peeling and the second peeling, and the data obtained after calculation mainly reflects the curing effect of silicone oil. The residual adhesion rate of UV-curing silicone fluids is generally 100%, and the residual adhesion rate of heat-curing silicone fluids is up to 90%. If a few ** merchants claim that their release liner residual adhesion rate is 100%, it is suspicious.

In the event of desiliconization, the residual adhesion rate of the release liner is generally not higher than 70%. The testing of the release liner specifications is quite a complex project. Generally, electronics factories and tape factories can only test the latter few data.

As for the amount of silicone oil coated, it generally does not appear in the technical report of the release coater.

First of all, what kind of paper is the ordinary paper you are referring to, the copy paper in the printer can be coated, the wet film can be 10-30 grams per square, the coating is to heat and melt the PE material evenly on the surface of the paper, it is torn off, basically all the paper can be coated. If it is coated kraft paper, it is recommended to take a look at Meiyihe Paper.

Yes, but it's expensive.

Yes, the details can be viewed on the paper guide future website.