Soft tube are commonly used packaging materials for cosmetics. They are divided into round tubes, oval tubes, flat tubes, and super flat tubes in technology. According to the product structure, it is divided into single-layer, double-layer and five-layer hoses. They are different in terms of pressure resistance, anti-permeability and hand feeling. Floor.
01 Basic quality requirements for hose appearance
1. Appearance requirements: In principle, under natural light or 40W fluorescent lamp, visual inspection at a distance of about 30cm, without surface unevenness, embossing (no twill on the tail), abrasions, scratches, and burns.
2. Smooth surface, clean inside and outside, uniform glazing, consistent glossiness with the standard model, no obvious irregularities such as unevenness, redundant stripes, scratches or indentations, deformation, wrinkles, etc., no foreign matter adhesion, small uneven spots There should be no more than 5 hoses. If the net content of the hose is ≥100ml, 2 blooms are allowed; if the net content of the hose is less than 100ml, 1 bloom is allowed.
3. The tube body and cover are flat, without front, no damage, no thread defects, the tube body is tightly sealed, the sealing tail line is flush, and the sealing width is the same. The standard size of the sealing height is 3.5-4.5mm, and the same branch is soft. The allowable deviation of the tube seal tail line height is less than or equal to 0.5mm.
4. Damage (the pipe or cap is damaged or rotten in any position); closed; the paint layer on the surface of the hose is off> 5 square millimeters; the tail is cracked; the end is broken; the thread is severely deformed.
5. Sanitation: the inside and outside of the hose are clean, and there are obvious dirt, dust and foreign objects inside the tube and cover. No foreign matter such as dust and oil, no peculiar smell, and meets the hygiene requirements of cosmetic-grade packaging materials: that is, the total number of colonies ≤ 10cfu, E. coli, Pseudomonas aeruginosa and Staphylococcus aureus shall not be detected.
02 Hose surface treatment and graphic printing requirements
1. Printing:
The overprint position deviation is between the upper and lower limit positions confirmed by both parties (≤±0.1mm), and there is no ghosting.
The graphics and texts are clear and complete and consistent with the color of the model. The color difference of the tube body and its printed graphics and text does not exceed the color difference range of the standard model.
The size of the text is similar to the standard sample, no hyphenation, slack, no gaps, and no influence on recognition
The printed font has no obvious burrs, ink edges, correct, no typos, missing characters, missing punctuation, missing text strokes, illegibility, etc.
2. Graphic: Overprinting is accurate, the overprinting error of the main part is ≤1mm, and the overprinting error of the secondary part is ≤2mm. No obvious heterochromatic spots and noise
For hoses with net content ≥ 100ml, the front side is allowed to have 2 spots no more than 0.5mm, a single total area no more than 0.2mm2, and the back allows 3 spots no more than 0.5mm, and a single total area no more than 0.2mm2. ；
For hoses with net content <100ml, one spot with no more than 0.5mm on the front, a total area of no more than 0.2mm2, and two spots on the back with no more than 0.5mm and a total area of no more than 0.2mm2 are allowed. .
3. Layout deviation
For the hose net content ≥100ml, the vertical deviation of the printing plate position shall not exceed ±1.5mm, and the left and right deviation shall not exceed ±1.5mm;
For the hose net content <100ml, the vertical deviation of the printing plate position shall not exceed ±1mm, and the left and right deviation shall not exceed ±1mm.
4. Content requirements: consistent with the film and samples confirmed by the supplier and the buyer
5. Color difference: the printing and hot stamping colors are the same as the samples confirmed by the supplier and the buyer, and the color deviation is between the upper and lower limit colors confirmed by both parties
03 Basic requirements for hose product structure
1. Specifications and dimensions: Measured with a vernier caliper according to the requirements of the design drawing, and the tolerance is within the specified range of the drawing: the maximum allowable deviation of the diameter is 0.5mm; the maximum allowable deviation of the length is 1.5mm; the maximum allowable deviation of the thickness is 0.05mm;
2. Weight requirements: Measure with a balance with an accuracy of 0.1g, and the standard value and allowable error are within the agreed range of both parties: the maximum allowable deviation is 10% of the weight of the standard sample;
3. Mouthful capacity: After filling the container with water at 20℃ and the mouth of the container is level, the filling water quality represents the container’s mouthful capacity, the standard value and error range are within the agreed range of both parties: the maximum allowable deviation is the standard sample’s mouthful capacity 5%;
4. Thickness uniformity (suitable for hoses with a content of 50ML or more): Cut the container and use a thickness gauge to measure 5 places on the upper, middle and lower sides, and the maximum allowable deviation is not more than 0.05mm
5. Material requirements: According to the materials stipulated in the contract signed by the supplier and the demander, the inspection shall be carried out with reference to the corresponding national industry standards, which is consistent with the sealing sample.
04 Basic requirements for hose sealing
1. The sealing method and shape meet the requirements of the contract between the two parties.
2. The sealing part is highly in compliance with the contract requirements of both parties.
3. The sealing tail is centered, straight, and the deviation between left and right is ≤1mm.
4. Firmness of sealing:
Fill the specified volume of water and place it between the upper and lower plates. The part of the cover should be moved out of the plate. In the middle part of the upper plate, pressurize to 10kg and keep it for 5min. , No bursting or leakage at the tail.
Use an air gun to apply 0.15Mpa air pressure to the hose for 3 seconds. No bursting tail.
05 Coordination requirements of hoses and accessories
Torque test (applicable to threaded fitting): When the threaded cap is tightened with a torque of 10kgf/cm at the hose port, the hose and cap will not be damaged and the teeth will not slip.
Cap opening force (suitable for even cap hose coordination): moderate opening force
2. After fitting, the hose and cover will not be skewed.
3. After the hose cover is matched, the gap is uniform, and the gap is unobstructed by touching the gap with your hand. The maximum gap is within the range confirmed by both parties (≤0.2mm).
4. Tightness test:
After the hose is installed with about 9/10 of the maximum capacity of water, cover the matching cover (if there is an inner plug, the inner plug should be equipped), and put it into the vacuum dryer to vacuum up to -0.06MPa and keep it for 5 minutes without leakage. ；
Fill the container with water according to the net content specified in the container, and place it flat at 40 ℃ for 24 hours after tightening the cap, without leakage;
06 Functional requirements for hoses
1. Compression resistance: refer to the following two methods
After the hose is installed with about 9/10 of the maximum capacity of water, cover the matching cover (with an inner plug should be equipped with an inner plug) and put it in the vacuum dryer to vacuum up to -0.08MPa and keep it for 3 minutes without cracking or leakage.
Randomly select 10 samples from each batch of materials; add the same weight or volume of water as the net content of each product to the sample tube, and place it horizontally; use the specified pressure to press the tube body vertically and statically for 1 minute, and the head area is ≥1/ 2 The force-bearing area of the container.
net weight
pressure
Eligibility requirements
≤20ml(g)
10KG
No rupture of the tube or cover, no tail burst, no end breakage
＜20ml(g), ＜40ml(g)
30KG
≥40ml(g)
50KG
2. Drop test: Load the contents of the specified capacity, close the lid, and fall freely to the cement floor from a height of 120cm. There will be no cracks, tail bursts, leaks, no hoses, tight lids, and no loose lids.
3. Cold and heat resistance (compatibility test):
Pour the contents into the hose or immerse the test piece in the contents, and place it at 48°C and -15°C for 4 weeks. The hose or test piece and the contents will be qualified.
Test 1 batch in every 10 batches of materials; extract 3 caps of each mold cavity from a batch of materials, and a total of 20 sets to match the tube; add water with the same weight or volume as the net content in the tube; reduce 1/2 A number of samples are heated to 48±2°C in a constant temperature box and placed for 48 hours; 1/2 number of samples are cooled in the refrigerator to -5°C to -15°C and placed for 48 hours; the samples are taken out and returned to room temperature. external assessment. Eligibility criteria: no cracks, deformations (referring to changes in appearance that cannot be restored), discoloration of any part of the tube and cover, and no cracks or breaks in the tail of the hose.
4. Yellowing test: Put the hose under ultraviolet light for 24h or 1 week in the sun, and it is qualified if there is no obvious discoloration compared with the standard sample.
5. Compatibility test: Pour the content into the hose or soak the test piece in the content, and place it at 48°C and -15°C for 4 weeks. No change in the hose or test piece and the content is considered qualified. .
6. Adhesion requirements:
Pressure-sensitive tape peeling method test: use 3M 810 tape to adhere to the test part, and after flattening (no bubbles allowed), forcefully and quickly tear off, there is no obvious adhesion of ink or hot stamping on the tape (required ink, hot stamping off area <total printed font area 5% of the surface) and larger area of varnish (<10% of the total surface area) fall off as qualified.
Contents influence: Use a finger dipped in the content to rub back and forth 20 times, and the content does not change color and the ink does not fall off.
The bronzing shall not fall off with a diameter of more than 0.2mm, and shall not be broken or broken. The deviation of the bronzing position shall not exceed 0.5mm.
Silk screen, hose surface, bronzing: 1 batch for every 10 batches, 10 samples are randomly selected from each batch of materials, and soaked in 70% alcohol for 30 minutes, the surface of the hose does not fall off, and the failure rate is ≤1/10.
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Post time: Dec-15-2021