1. Major categories of plastic materials
1. AS: low hardness, brittle, transparent color, and the background color is bluish, which can directly contact with cosmetics and food.
2. ABS: It belongs to engineering plastics, which is not environmentally friendly and has high hardness. It cannot be directly in contact with cosmetics and food. In acrylic cosmetic packaging materials, it is generally used for inner covers and shoulder covers, and its color is yellowish or milky white.
3. PP, PE: They are environmentally friendly materials that can be directly in contact with cosmetics and food. They are the main materials for filling organic skin care products. The natural color of the material is whitish and translucent.
4. PET: It is an environmentally friendly material that can be directly in contact with cosmetics and food. It is the main material for filling organic skin care products. The PET material is soft and its natural color is transparent.
5. PCTA, PETG: They are environmentally friendly materials that can be directly in contact with cosmetics and food. They are the main materials for filling organic skin care products. The materials are soft and transparent, and they are not commonly used for spraying and printing.
6. Acrylic: The material is hard, transparent, and the background color is whitish. In order to maintain the transparent texture, it is often sprayed inside the outer bottle, or colored during injection molding.
2. Types of packaging
1. Vacuum bottles: caps, shoulder sleeves, vacuum pumps, pistons.
2. Lotion bottle: consists of a cap, a shoulder sleeve, a lotion pump, and a piston. Most of them are equipped with hoses inside, and most of them are made of acrylic outside and PP inside, and the cover is made of acrylic outside and ABS inside.
3. Perfume bottle: The internal composition is glass and the external aluminum, PP bottle, glass drip irrigation, and the inner tank of the perfume bottle is mostly glass and PP.
4. Cream bottle: there are outer cover, inner cover, outer bottle and inner liner. The outside is made of acrylic, and the inside is made of PP. The cover is made of outside acrylic and inside ABS with a layer of PP gasket.
5. Blow-molded bottle: The material is mostly PET, and the caps are divided into three types: swing caps, flip caps and screw caps.
6. Blowing and injection bottles: the material is mostly PP or PE, and the caps are divided into three types: swing caps, flip caps and screw caps.
7. Aluminum-plastic hose: the innermost one is made of PE material and the outer one is made of aluminum packaging, which is offset printed, cut and then coiled.
8. All-plastic hose: All of them are made of PE material. Pull out the hose first, then cut, offset, silk screen, and hot stamp.
3. Nozzle, lotion pump, hand washing pump and length measurement
1. Nozzle: bayonet and screw are all plastic, but some are covered with a layer of aluminum cover and a layer of anodized aluminum.
2. Lotion pump: It is divided into vacuum and suction tube, both of which are screw ports.
3. Hand washing pump: the caliber is too large, and they are all screw ports.
Length measurement: the length of the straw, the exposed length and the length measured under the cover.
Classification of specifications: Classification mainly depends on the inner diameter of the product or the height of the large circle.
Nozzle: 15/18/20 MM / 18/20/24 for all plastic
Lotion pump: 18/20/24 MM
Hand pump: 24/28/32(33) MM
Large ring height: 400/410/415( It’s just a simple specification code, not the actual height)
Note: The expression of specification classification is as follows: lotion pump: 24/415
measurement method: there are two kinds of peeling measurement method and absolute value measurement method.
4. Coloring process
1. Anodized aluminum: the outer surface of aluminum is wrapped in one layer of inner plastic.
2. Electroplating (UV): Compared with the spray pattern, the effect is brighter.
3. Spraying: Compared with electroplating, the color is dull.
Spraying on the outside of the inner bottle: it is spraying on the outside of the inner bottle, there is an obvious gap between the outer bottle and the outer bottle from the outside, and the spray area is small when viewed from the side.
Spraying inside the outer bottle: It is spray-painted on the inner side of the outer bottle. It looks larger from the outside, but smaller when viewed from the vertical plane, and there is no gap with the inner bottle.
4. Brushed gold-coated silver: It is actually a film, and you can find the gaps on the bottle if you observe carefully.
5. Secondary oxidation: Secondary oxidation is carried out on the original oxide layer, so that the smooth surface is covered with dull patterns or the dull surface has smooth patterns, which are mostly used for logo production.
6. Injection molding color: Toner is added to the raw materials when the product is injected. The process is relatively cheap, and pearl powder can also be added. Adding cornstarch will make the transparent color of PET become opaque.
5. Printing process
1. Silk screen printing: After printing, the effect has obvious concave-convex feeling, because it is a layer of ink.
Silk screen regular bottles (cylindrical) can be printed at one time, other irregular ones are charged at one time, and colors are also charged at one time, which are divided into two types: self-drying ink and UV ink.
2. Hot stamping: a thin layer of paper is hot stamped on it, so there is no unevenness of silk screen printing.
Hot stamping is best not to be directly on the two materials of PE and PP. It needs to be heat transfered first and then hot stamped, or it can be hot stamped directly with good hot stamping paper.
3. Water transfer printing: it is an irregular printing process carried out in water, the printed lines are inconsistent, and the price is more expensive.
4. Thermal transfer printing: Thermal transfer printing is mostly used for products with large quantities and complicated printing. It belongs to attaching a layer of film on the surface, and the price is relatively expensive.
5. Offset printing: It is mostly used for aluminum-plastic hoses and all-plastic hoses. If the offset printing is a colored hose, silk screen printing must be used when making white. or submembrane.
Post time: Jun-05-2023