Classification of cosmetic packaging materials: inner packaging materials and outer packaging materials
Inner packaging materials: bottles, caps, plugs, gaskets and other materials that are in direct contact with the contents to form a closed space.
Outer packaging materials: other materials used for decoration, protection of contents and inner packaging materials.
Inner Packaging Container
Containers are the main packaging materials in the field of cosmetics. At the same time, the core components such as Plastic Pumps, Plastic Sprayers, and Plastic Bottle Caps for containers are also made of plastic. Therefore, there is an indissoluble bond between cosmetics and plastics.
Here are some common types of plastics:
ABS is an engineering plastic, 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. The color is yellowish or milky white.
2. PP, PE:
PP and PE 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 material is whitish and translucent. According to different molecular structures, three different degrees of softness and hardness can be achieved.
PET 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 relatively soft and its natural color is transparent.
4. PCTA, PETG:
PCTA and PETG 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. PCTA and PETG are soft and easy to scratch. And it is not commonly used for spraying and printing.
AS hardness is not high, relatively brittle (there is a crisp sound when knocked), transparent color, and the background color is bluish, it can be directly in contact with cosmetics and food. In ordinary lotion bottles and vacuum bottles, it is generally the material of the bottle body. Small-capacity cream bottles can also be made. It is transparent.
The material is hard, transparent, and the background color is whitish. In addition, in order to maintain a transparent texture, acrylic is often sprayed inside the outer bottle, or colored during injection molding.
According to the packaging form and material variety of cosmetics, it can be divided into the following categories:
a. Bottles (including plastic bottles, glass bottles, etc.);
b. Caps [including outer cover, inner cover, (plug, pad, film), etc.];
c. Bags (including paper bags, plastic bags, composite bags);
d. Tubes (including plastic tubes, composite tubes, metal tubes, etc.);
e. Jars (including plastic paper jars, plastic jars, metal jars, etc.);
f. Spray cans (including pressure-resistant aluminum cans, iron cans, etc.);
g. Ingot tubes (including lipstick tubes, foundation tubes, mascara tubes, etc.);
h. Cosmetic pens
i. Pump (including air pressure type and pump type);
j. Outer box (including flower box, plastic seal, middle box, transport packaging, etc.).
Basic requirements for packaging materials
1. Containers and container supporting classes:
1). Bottle :
The body of the bottle should be stable, the surface should be smooth, the thickness of the bottle wall should be basically uniform, there should be no obvious scars or deformations, and there should be no cold bursts or cracks. The mouth of the bottle should be straight and smooth, no burrs (burrs) should be used, and the thread and bayonet fitting structure should be intact and straight. The fit between the bottle and the cap should be tight, without slipping, loosening or leakage. The inside and outside of the bottle should be clean.
The body of the tube should be smooth, clean, uniform in thickness, without obvious scratches, and the color should be uniform. The sealing of the tube should be firm and correct, and there should be no openings or wrinkles (except for the normal indentation of the mold). The composite film of the hose should have no floating phenomenon.
The cap is divided into: PP material, ABS material, sarin material, PTCG material, K material, anodized aluminum, etc. Different materials are determined by experience such as touch feeling, appearance, and falling rebound sound, and the disinfection methods are different.
Inner Cap: The inner cap should be complete, smooth, clean and free from deformation. The inner cap should fit well with the bottle and outer cap. The inner cap should not be left out.
Outer Cap: The outer cap should be upright, smooth, free of breakage, cracks, and burrs (burrs). The color of the outer cover should be uniform. The screw fit structure of the outer cover should be intact.
The color of the cover with anodized aluminum or hot stamping should be uniform. The flip-top cover should be turned up flexibly, and the connection parts should not be broken. The fit between the cap and the bottle should be tight without slipping or loosening.
4). Spray cans
The tank body is flat, without rust spots, the weld seam is smooth, there is no obvious scratch or concave tank phenomenon, and the color and luster should be uniform. The mouth of the spray can should be smooth, without wrinkles, cracks and deformation. The cover of the spray can should meet the requirements of 5.3.2. 5). Nozzle. The nozzle should be upright, clean and free from damage and cracks. The assembly parts of the nozzle should be intact to ensure smooth spraying.
2. Basic quality requirements for flexible packaging
Bags should not have obvious wrinkles, scratches, or air bubbles. The color of the bag should be uniform. The seal of the bag should be firm, and there should be no opening, perforation, or leakage (paste). The compound bag should be compounded firmly and evenly coated.
2). Plastic seal
The plastic seal should be firmly bonded without cracking. The surface of the plastic seal should be clean and free from damage. There is no wrong loading, missing loading, or reverse loading in the plastic package.
3. Basic requirements for cosmetic packaging materials
1). Spindle tube
The body of the ingot tube should be straight, smooth, free of cracks, burrs (burrs), no obvious scratches, and the color should be uniform. The fit of the parts of the ingot tube should be tight enough to ensure that the contents can be unscrewed or pushed out normally.
2). Cosmetic Pen
The pen holder and pen cover of the cosmetic pen should be smooth and straight, with no glue and no cracking of the paint film. The barrel of the cosmetic pen and the pen cover should be tightly matched. The color of the makeup pencil should be uniform.
4. Basic quality requirements for outer packaging
The surface of the box should be smooth and straight, and there should be no obvious bottom scratches, burrs (burrs), severe compression and damage. The tightness of the opening of the box should be appropriate. When taking out the flower box, do not use your fingers to forcibly peel it off, so as to pinch the edge of the cover and the bottom does not fall off automatically. The mirror inside the box, the contents and the box should be firmly pasted, the mirror image should be good, and there should be no scratches or damage on the bottom.
2. Printing and Labeling
The patterns and writings printed on cosmetic packaging should be neat, clear, not easy to fall off, and the color should be uniform. Cosmetic packaging labels should not be wrongly posted, missed, or upside down, and should be firmly pasted. Labeling requirements are in accordance with GB 5296.3.
3. Flower box
The flower box should be tightly matched with the middle box packaging. The flower box should be clean, upright and flat, with a good lid and no wrinkles, missing edges or corners. The adhesive parts of the flower box should be firmly pasted, without pasting marks, cracks and mutual adhesion. There is no wrong loading, missing loading, or flipping of the product.
4. Middle box
The middle box should be tightly matched with the flower box packaging. The middle box should be clean, straight and flat, and the box cover should be closed. The adhesive parts of the middle box should be firmly pasted, without pasting marks, cracks and mutual adhesion. There is no wrong loading, missing loading, or flipping of the product. The middle box label should be correct, clean and complete, and should indicate the product name, specification, boxed quantity and producer name as required.
5. Requirements for trademarks, manuals, box headers and certificates in the packaging.
1). The printed trademark should have a correct pattern, clear color registration, and clear and firm writing.
2). The trademark should be firmly pasted, and it must not be skewed, missed, upside down, or wrongly pasted.
3). The printed pattern of the instruction manual is neat and clear.
4). The printed handwriting and pattern of the box head (sticker) are clear.
5). The printed handwriting and pattern of the certificate of conformity are clear, and there are marks such as the name of the factory and the code number of the inspector.
6). The standard number to be implemented should be marked on the product or its instructions and packaging.
7). Labeling of production date and shelf life or production batch number and expiry date.
8). The transportation packaging should be neat, correct, smooth, and sealed firmly; the product should be free of wrong, missing, and inverted packaging.
Problems that are easy to occur in the acceptance of packaging materials.
To sum up, there are mainly two aspects
1. Technological issues
1). The color printing accuracy of the inner bag of the mask is not enough, and the color is not correct
2). The layout of the inner bag is inconsistent with the design draft (the rounded corners at the edges become right angles)
3). The paint of the glass bottle is peeled off, and the hot stamping is misplaced
4). Scratches occur during the transportation of glass bottles; the hot stamping on the frosted glass bottle rubs against the bottle body, and the hot stamping is scratched
5). The bottle cap is loose, the pump head is tightened, and the gap between the pump head and the bottle shoulder is too large
6). Misprinting (trademark misprint, name misprint, weight misprint, etc.)
7). The surface of the box is uneven
8). The box is deformed, the sticking is not firm, and there are traces of glue on the box surface
9). Color box printing, gold paste on the hot stamping place
10). The caliber of the hose is wrong (need 3mm, the finished product is 5mm)
11). The color difference of the packaging material is too large (comparison of each batch of packaging)
12). The manufacturer changes the color of the electric eye on the package at will (the colored dot in the middle of the end of the toothpaste tube)
13). The hose printing icon is deformed
14). Glue adhesion on the handbag
15). Incomplete supporting package
16). The packaging surface is dirty, with dust, glue, fingerprints, etc.
2. Material issues
1). Insufficient support of inner card
2). The brightness of the glass bottle is not enough
3). The number of composite layers of the hose is not enough
4). The inner bag of the mask is not thick enough
5). The buckle of the inner cap of the bottle is too soft and deformed during the tightening process
6). Some plastic bottles are not resistant to high temperature, deformed or brittle
7). Plastic bottles become brittle under light
The above is just a list of some common problems, and there are many other problems. The customer needs to control the packaging materials. For example, there should be no pitting on the front of the bottle. Some customers can accept it, and the acceptance personnel need to grasp it.
Inspection methods and standards for various packaging materials
1. Ensure that the materials used must be hygienic and non-toxic:
All materials should have a certain chemical stability, cannot interact with the products they contain, and are not easy to change color and fade under light. The packaging material for new product development is green and environmentally friendly, and the compatibility with the material body is tested at high and low temperature to ensure that the material body will not deteriorate, delaminate, change color and become thinner; for example: mask cloth, air cushion sponge, bottle with gradient special process, etc. .
2. Inspection standards for different packaging materials
3. Basic elements of functional determination
For cosmetics, the functional test of packaging materials is also one of the necessary tests in production, which must be strictly checked, such as:
1). Comparison of packaging materials and samples:
Perform a detailed comparison check against a standard sample out of direct sunlight.
2). Sealing test:
Take the matching bottle/tube with plug, cap, pump head and spray head, fill it with an appropriate amount of water or product, tighten the cap plug, pump head and spray head, and observe its tightness. To prevent the deterioration of the packaged goods due to the leakage caused by the poor sealing performance of the product, the test methods are as follows:
a. Put it upside down at room temperature, place it horizontally, and check after 24 hours;
b. Invert at room temperature, squeeze the bottle/tube with your fingers for one minute and check.
c. Test with a seal tester, between 0.04MPa and 0.06MPa under negative pressure, and the test time is within one to five minutes
3). The bottle mouth is complete
4). Matching degree with accessories and gap deviation:
For example, the bottle cap is loose, the pump head is tightened, and the gap between the pump head and the shoulder of the bottle is too large and other process problems should be limited within the approved value range.
5). Selection of special packaging materials and judgment of sealing effect:
For example, oil-based packaging materials and water-based packaging materials generally use narrow-mouth bottles, which should be equipped with pump heads. If they are equipped with lids, they should be equipped with inner plugs, plus sealing aluminum film stickers to increase sealing and reduce material leakage.
6). Allowable error of bottle weight:
Use a balance with a sensitivity of 0.1g to weigh the sample weight and compare it with the approved value.
ALSO - - -
There are also: barrier performance testing, tensile strength testing, heat sealing strength testing, impact resistance testing, solvent residual testing, printing quality testing, etc.; in short, as "supporting role" packaging materials, these seemingly cumbersome testing links , but it is the key to ensuring the quality and safety of cosmetics.
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