Some standard content:
QB/T 1499—2000
This standard has formulated 10 specification series of claw-type twist-off cap industry standards based on the former Ministry of Light Industry standards QB/T3622--1999 "70-type twist-off cap" and QB/T1499-1992 "63-type, 82-type twist-off caps", and incorporated the technical contents of the 70-type in QB/T3622--1999 and the 63-type, 82-type in QB/T1499-1992 into this standard. The technical requirements in Appendix A are not only related to the technical requirements of bottle caps, but also closely related to the manufacturing accuracy of the bottle mouth and the vacuum degree in the bottle. From the date of implementation of this standard, the industry standards QB/T3622--1999 "70-type twist-off cap" and QB/T1499--1992 "63-type, 82-type twist-off caps" issued by the former Ministry of Light Industry will be abolished. Appendix A of this standard is a reminder appendix.
This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Food Fermentation Standardization Center. The drafting units of this standard: Wuxi Huapeng Jiaduobao Bottle Cap Co., Ltd., China Food Fermentation Industry Research Institute. The main drafters of this standard: Xun Siyue, Yang Jingwei, Wang Baiqin. 261
1 Scope
Light Industry Industry Standard of the People's Republic of China
Claw-type twist-off cap
QB/T 1499-—2000
Replaces QB/T1499—1992
QB/T3622—1999
This standard specifies the product specifications, models, classifications, technical requirements, test methods, inspection rules, markings, packaging, transportation, and storage requirements for claw-type twist-off caps.
This standard applies to claw-type twist-off caps made of tinned (chrome) steel sheets for sealed packaging of beverages, condiments and other bottled foods. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2520-1988 Electroplated tinned steel sheets and strips GB/T2828-1987 Batch-by-batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) GB4805-1994 Hygienic standard for epoxy phenolic coatings on the inner wall of food heads GB/T5009.67-1996 Hygienic standard for polyvinyl fluoride molded products for food packaging GB/T5009.69-1996 Hygienic standard for epoxy phenolic coatings on the inner wall of food cans GB9681-1988 Hygienic standard for polyvinyl chloride molded products for food packaging QB/T1877-1993 Packaging decoration Tinned (chromium) steel sheet prints 3 Definitions
This standard adopts the following definitions.
3.1 Conventional claw-type twist-off cap
The structure and dimensions of the cap are in accordance with conventional requirements. 3.2 Ring-shaped claw-type twist-off cap
The top surface of the sealing gasket injection groove is in the shape of a circular step. 3.3 Medium-high claw-type twist-off cap
The height of the cap is medium.
3.4 Safety button-type claw-type twist-off cap
The cap has a circular vacuum safety button in the center. 3.5 Pressurized sterilization claw-type twist-off cap
Applicable to caps with a sterilization temperature higher than 100°C. 3.6 Normal pressure sterilization claw-type twist-off cap
Applicable to caps sterilized by boiling water.
3.7 Hot filling claw-type twist-off cap
Applicable to caps with a filling material temperature higher than 80°C and no longer sterilized after sealing. 3.8 Solid sealing gasket
A solid sealing gasket made of polyvinyl chloride resin and other auxiliary materials, which is bonded to the inner wall of the bottle cap after injection, baking and plasticization. Approved by the State Bureau of Light Industry on 2000-03-30
Implemented on 2000-08-01
3.9 Foaming sealing gasket
QB/T 1499—2000
A sealing gasket with micro pores made of polyvinyl chloride resin and foaming agent and other auxiliary materials, which is bonded to the inner wall of the bottle cap after injection, baking and plasticization.
4 Product specifications, models and classifications
4.1 Product specifications
Product specifications include common claw-type twist-off caps with nominal diameters of 30, 38, 43, 48, 53, 5863, 66, 70, 82mm. 4.2 Product Models
Product models and names are shown in Table 1.
Regular Twist-off CapsSafety ButtonRegular Twist-Button CapsRing-shaped Claw-type Twist-off CapsSafety ButtonRing-shaped Claw-type Twist-off CapsMedium Twist-off CapsSafety ButtonMedium Twist-Button Caps4.3 Product Classification
4.3.1According to the characteristics of the filled food, they are divided into: acid-resistant, sulfur-resistant and oil-resistant claw-type twist-off caps. Model Number
4.3.2According to the sterilization method of the filled food, they are divided into: pressure sterilization, normal pressure sterilization and hot filling claw-type twist-off caps. 5 Technical requirements
5.1 Raw and auxiliary materials
5.1.1 Tin (chromium) plate
The quality requirements shall comply with the provisions of Group I products in GB/T2520. 5.1.2 Inner wall coating
The selected inner wall coating shall not affect the flavor of the food, and its sanitary requirements shall comply with the provisions of GB4805, or other coatings approved by the health administrative department of the State Council shall be selected. 5.1.3 Sealant
Use polyvinyl chloride glue, and its sanitary requirements shall comply with the provisions of GB9681. Other glues shall meet the corresponding sanitary requirements. 5.1.4 External wall coating
Use iron printing ink and coating that are resistant to high temperature baking, stamping and boiling. 5.2 Specifications and dimensions of claw-type twist-off cap
5.2.1 The basic structure and dimensions of the cap are shown in Figure 1, and its main specifications and dimensions are specified in Table 2. 5.2.2 Sealing gasket width
For specification 30, it should be no less than 6.6mm; for specifications 38~82, it should be no less than 8mm. 263
Overhead outer diameter O.D
Overhead inner diameter
Distance between melon diameter and LD
Sealing gasket thickness deviation
5.2. 3, 1
QB/T1499—2000
Overhead height H
Melon height S
Sealing gasket circumference thickness D
±0.250.75
Solid sealing gasket plaque: The thickness deviation of each disc on the same circumference shall not exceed 0.4 mm. 5.2.3.2 Foam sealing gasket: The thickness deviation of each cover on the same circumference shall not exceed 0.45mm. 5.3 Appearance quality of claw-type twist-off cap
5.3.1 The cap shall be in complete shape, without obvious dents or wrinkles, and shall not be stained with dirt. 5.3.2
The claws of the cap shall be flat and of roughly the same size, and the double-layer iron sheet shall be rolled tightly. Foaming
The printed pattern shall be clear, the trademark text shall be correct, and other appearance indicators shall meet the corresponding requirements of QB/T1877. 5.3. 3
The deviation between the center point of the printed pattern and the center point of the cap shall not exceed 1.2mm. 5.3.4
The inner wall coating shall not have scratches that expose the coating. 5.3.5
5.3.6 The surface of the sealing gasket shall be flat, the color shall be uniform, and there shall be no defects. 5.4 Quality of coating on the outer wall of claw-type twist-off cap
Number of claws/piece
QB/T 1499--2000
After the test, the coating shall not fade, bleed, bubble, fall off, or lose gloss. 5.5 Quality of coating on the inner wall of claw-type twist-off cap
5.5.1 Corrosion resistance: After the test, there shall be no continuous or sheet-like pitting corrosion. 5.5.2 Acid resistance: After the test, there shall be no discoloration, fall off, or corrosion. 5.5.3 Sulfur resistance: After the test, there shall be no obvious sulfur spots or fall off. 5.6 Quality of sealing gasket of claw-type twist-off cap
5.6.1 Plasticization degree: Good plasticization, gasket shall not break. 5.6.2 Adhesion: The gasket and the inner coating of the cap and the inner coating and the tinned (chromium) steel sheet shall be firmly bonded and not shifted. 5.6.3 Oil resistance: Good oil resistance, no oil seepage or leakage after sealing. 5.7 Opening performance of claw-type twist-off cover
Easy to open with bare hands, see Appendix A for opening torque. 5.8 Vacuum safety button of claw-type twist-off cover
Technical requirements see Appendix A.
6 Test method
6.1 Raw and auxiliary materials
6.1.1 Tinned steel sheet test
According to the provisions of GB/T2520.
6.1.2 Inner wall coating test
According to the provisions of GB/T5009.69.
6.1.3 Sealant test
According to the provisions of GB/T5009.67.
6.2 Specifications and dimensions of claw-type twist-off cap
6.2.1 Arbitration method: The outer diameter of the cap, the inner diameter of the cap, the claw diameter distance, and the cap height are measured with special measuring tools for through gauges and stop gauges. 6.2.2 Conventional method: Measure with a measuring tool with an accuracy of 0.02mm or a special measuring tool. 6.2.3 Claw height measurement
Hook the special probe on the dial indicator measuring rod into the bottom of the cap claw, use the top surface of the bottle cap as the reference surface and place it on the measuring platform, and measure the highest distance S from the top surface of the cap to the bottom of the claw. See Figure 2 for the test method. Figure 2
Determination of sealing gasket thickness
QB/T1499—2000
Use the top surface of the bottle cap as the reference surface and place it on the measuring platform and measure it with a dial indicator. The radial distance d from the measuring point to the outer wall of the cap is as specified in Table 3. The test method is shown in Figure 3. The bottle cap should be rotated tightly against the V-shaped positioning block for one circle to record the maximum and minimum readings of the dial indicator. The measurement result is: D= Tmax (or Tmin)-t
△ = Tmax —Tmin
Where: D-
-Sealing gasket thickness, mm;
-Coating iron thickness, mm;
-The maximum dimension from the top cover surface to the gasket, mm; -The minimum dimension from the top cover surface to the gasket, mm; -The same circumference thickness deviation of the sealing gasket, mm. Figure 3
38,53,58,63,66,70,82
6.2.5 Determination of sealing gasket width
Use a vernier caliper to measure the minimum distance from the outer wall of the cover to the inner circumference of the gasket. See Figure 4. W Gasket circumference density, mm.
（1）
6.3 Appearance quality of claw-type twist-off cap
6.3.1 Visual inspection
6.3.2 Pattern position determination
QB/T 1499—2000
Measure the blank width (accurate to 0.1 mm) bmax and bmin of any symmetrical part on the left and right (upper and lower) of the sample, see Figure 5, the test result is: a = (bmax -bmin)/2
Where: α-
Pattern position deviation;
Maximum blank width;Www.bzxZ.net
Minimum blank width.
6.4 External wall coating quality of claw-type twist-off cap
6.4.1 Hot filling cap
After the cap is kept in 85℃ hot water for 30 minutes, take it out and cool it to room temperature, and observe the external wall coating. 6.4.2 Normal pressure sterilization cap
After heating the cap in boiling water for 30 min, take it out and cool it to room temperature, and observe the coating on the outer wall. 6.4.3 Pressure sterilization cap
After heating the cap in 121℃ water for 30 min, take it out and cool it to room temperature, and observe the coating on the outer wall. 6.5 Quality of coating on the inner wall of claw-type twist-off cap
6.5.1 Corrosion resistance test
* (3)
6.5.1.1 Add 84mL of concentrated hydrochloric acid (density 1.19g/cm2) to 700mL of distilled water while stirring, and then dissolve 200g of copper sulfate in the above acid solution.
6.5.1.2 Soak the cap in the copper sulfate hydrochloric acid solution for 2 min, then take it out and rinse it with water, and observe the inner wall. 6.5.2 Acid resistance test
6.5.2.1 Acid resistance cover
Pour 2% (m/V) citric acid solution into the sample bottle that matches the cover, and the amount of acid solution should not be less than 90% of the volume of the sample bottle. After heating the cover in boiling water for 30s, immediately seal it with the sample bottle, then invert the sample bottle in warm water, heat and boil for 30min, cool to room temperature, open the cover and check the inner wall of the cover.
6.5.3 Sulfur resistance test
6.5.3.1 Sulfur resistance cover
Adjust the pH value of 0.3% (m/V) sodium sulfide solution to 6.0 with 3% (V/V) acetic acid, and pour it into the sample bottle, and the amount of solution should not be less than 90% of the volume of the sample bottle. After the cap is heated in boiling water for 30 seconds, it is immediately sealed with the sample bottle. Then the sample bottle is inverted in warm water and heated at 121℃ for 30 minutes. After cooling to room temperature, the cap is opened to inspect the inner wall of the cap. 6.6 Quality of the sealing gasket of the claw-type twist-off cap
6.6.1 Plasticization degree test
6.6.1.1 Hot filling cap
QB/T 1499---2000
Pour hot water above 85℃ into the preheated sample bottle to the neck. After the cap is heated in boiling water for 30 seconds, it is immediately sealed with the sample bottle. After cooling to room temperature, the cap is opened to inspect the gasket.
6.6.1.2 Normal pressure sterilization cap
Pour hot water above 70℃ into the preheated sample bottle to the neck. After the cap is heated in boiling water for 30 seconds, it is immediately sealed with the sample bottle. Then the sample bottle is placed in warm water and heated and boiled for 30 minutes. After cooling to room temperature, the cap is opened to observe the gasket. 6.6.1.3 Pressure sterilization cap
Pour hot water above 70℃ into the preheated sample bottle until the neck. After the cap is heated in boiling water for 30 seconds, it is immediately sealed with the sample bottle. Then the sample bottle is placed in warm water and heated at 121℃ for 30 minutes. After cooling to room temperature, the cap is opened to observe the gasket. 6.6.2 Adhesion test
6.6.2.1 Hot filling cap
After testing according to method 6.6.1.1, observe the gasket. 6.6.2.2 Normal pressure sterilization cap
After testing according to method 6.6.1.2, observe the gasket. 6.6.2.3 Pressure sterilization cap
After testing according to method 6.6.1.3, observe the gasket. 6.6.3 Oil resistance test
6.6.3.1 Hot filling oil-resistant cap
Pour vegetable oil above 85℃ into the preheated sample bottle to the neck. Heat the cap in boiling water for 30s, seal it with the sample bottle immediately, cool it to room temperature, and observe it after inverting it on filter paper for 24 hours. 6.6.3.2 Normal pressure sterilization oil-resistant cap
Pour vegetable oil above 80℃ into the preheated sample bottle to the neck. Heat the cap in boiling water for 30s, seal it with the sample bottle immediately, and then put the sample bottle in warm water, boil it for 30 minutes, cool it to room temperature, and observe it after inverting it on filter paper for 24 hours. 6.6.3.3 Pressure sterilization oil-resistant cap
Pour vegetable oil above 80℃ into the preheated sample bottle to the neck. After the cover is heated in boiling water for 30 seconds, it is immediately sealed with the sample bottle, and then the sample bottle is placed in warm water, heated at 121C for 30 minutes, cooled to room temperature, and inverted on filter paper: observe after 24 hours. 6.7 Determination of the opening performance of claw-type twist-off cover
6.7.1 Hot thin cover
After the test according to method 6.6.1.1, open the cover with a torque tester and observe the value of the opening torque. 6.7.2 Normal pressure sterilization cover
After the test according to method 6.6.1.2, open the cover with a torque tester and observe the value of the opening torque. 6.7.3 Pressure sterilization cover
After the test according to method 6.6.1.3, open the cover with a torque tester and observe the value of the opening torque. 7 Inspection rules
7.1 Before the product leaves the factory, the inspection department of the manufacturing unit shall inspect each batch according to the standard requirements. Only when it meets the standard requirements and is accompanied by a product certificate can it leave the factory.
7.2 Products continuously produced by the same material, same process, same specification and same production line are considered a batch. 7.3 Product inspection shall be carried out in accordance with the normal inspection and secondary sampling plan of GB/T2828. 7.4 Factory inspection
7.4.1 The factory inspection items are items 3 to 11 and 13 to 15 in Table 4. 268
Inner wall coating
Sealant
Plasticization degree
Adhesion
Oil resistance
Project name
Inner wall corrosion resistance
Acid resistance
Sulfur resistance
Specifications and dimensions of melon-type twist-off cap
Appearance quality of claw-type twist-off cap
Outer wall coating quality of claw-type twist-off cap
Tin (chrome) plated steel sheet
Printed pattern
Pattern Position
Openability of claw-type twist-off cap
Judgment rules
QB/T1499-2000
Technical requirements
Test method
Unqualified
Inspection level
Qualified quality level
All qualified
7.4.2.1 Batches of products judged as Class A unqualified shall not be shipped out of the factory. The manufacturing unit shall conduct a full inspection or rework of the products, and then submit them for inspection again. They can only be shipped out of the factory after they are qualified.
7.4.2.2 Batches of products judged as Class B and Class C unqualified shall not be shipped out of the factory in principle. The specific handling method can be negotiated by the supply and demand parties. 7.5 Type inspection
7.5.1 Type inspection should be carried out in any of the following situations. a) Change of main raw and auxiliary materials or key processes; b) When the product is resumed after long-term suspension; c) When the national quality supervision agency proposes a requirement for type inspection. 7.5.2 Type inspection items are all items in Table 4. 7.5.3 Samples for type inspection should be drawn from the batch of goods that have passed the factory inspection. 7.5.4 The judgment rules for type inspection shall be in accordance with 7.4.2, and production shall be improved until the new type inspection is passed before production can be resumed. 7.6 In the continuous production process, the transfer rules specified in GB/T2828 may be used. 269
8 Marking, packaging, transportation, purchase and storage
8.1 Marking
QB/T1499—2000
The product packaging box should have the manufacturer, registered trademark, product name, specification, quantity, adopted standard number, production date, and be accompanied by an inspection pass label.
8.2 Packaging
The product must be packed in clean and non-toxic plastic film bags first, and then packed in transport boxes on the outside. The boxes should be tightly packed. 8.3 Transportation
The means of transport should be clean and dry. During transportation, the product should be loaded and unloaded with care to prevent moisture, rain and snow from getting in, and the packaging from being contaminated or damaged. 8.4 Storage
The product should be stored in a dry and clean warehouse to prevent moisture, contamination, and rust. It should not be stored together with toxic or harmful items. 8.5 The shelf life is two years.
If the provisions of 8.3 and 8.4 are met, the product shelf life is two years. 270
A1 Technical requirements for opening torque
QB/T1499—2000
Appendix A
(Indicative Appendix)
Technical requirements for vacuum safety button and opening torqueAfter testing according to method 6.7, it is easier to open with bare hands using a torque tester. For reference indicators of opening torque under vacuum of 0.024MPa~0.064MPa, see Table A1.
Technical requirements for vacuum safety button
For reference limit values of vacuum when vacuum safety button is sucked down and bounced up, see Table A2. Table A2
38,43,48
A2.2 Inspection method
max suction
Vacuum degree
min bounce
Opening torque/N·m
1.30~2.60
1.64~3.28
1.75~3.50
1.95~3.90
2.35~4.70
2. 60~~5. 20
2.85~~5.70
3.30~~6.60
Difference between suction and bounce values/min
Measure with a steel round measuring cup of corresponding caliber. Put the lid on the cup mouth with the lid facing downwards, start the vacuum pump to slowly draw the vacuum in the cup. When the lid safety button is completely sucked down, read the value on the pressure gauge at this time, which is the vacuum value when the lid is sucked down. Then slowly release the vacuum. When the safety button pops up, the value read on the pressure gauge at this time is the vacuum value when the lid is popped up.
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