Quality control

Quality Control

Our Producing facility: Double-drop producing machine + 4step inspecting(auto-manual-auto-manual) + Auto packing machine.

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4.1 Products must be manufactured in accordance with drawings and technical documents that have been approved by the prescribed procedures and meet the standard

4.2 Specifications

4.2.1 Full-container capacity tolerance should meet the requirements in table 1

Table 1. Full-container Capacity Tolerance

Capacity(Nominal Value or Full-container)L,ml	Tolerance ml
25＜L≦50	±3
50＜L≦100	±4
100＜L≦200	±8
200＜L≦300	±10
300＜L≦500	±12
500＜L≦750	±15
L>750	±25
Note: Tolerances for special products can be determined in accordance with clients'requirements.

4.2.2 Height tolerance TH(mm) is calculated in Formula（1）

TH=±(0.6+0.004H) ………………………………（1）

In the formula：

H——bottle height，mm.

4.2.3 Body OD Tolerance TD(mm) is calculated in formula （2）

TD=(0.5+0.012D) ………………………………（2）

In the formula：

D——outer diameter，mm.

4.2.4 Vertical axis deviation TV(mm) is calculated in formula （3）、（4）

When H≦120mm

TV≦1.5 ………………………………（3）

When H>120mm

TV≦（0.5+0.01H） ………………………………（4）

In the formula：

H——bottle height，mm.

4.2.5 Bottle mouth OD tolerance should meet the requirements in table 2

Table 2 Bottle Mouth OD Tolerance

Bottle Mouth OD D,mm	Tolerance,mm
20＜D≦60	±0.35
60＜D≦80	±0.45
80＜D≦100	±0.6
Note: Tolerances for special products can be determined in accordance with clients'requirements.

4.2.6 Screw thread OD tolerance is the same as bottle mouth OD

4.2.7 Bottle mouth ID

4.2.7.1 Mouth ID tolerance for bottles with an inner stopper should meet the requirements in table 2

4.2.7.2 For bottles without an inner stopper the tolerance is ±1mm

4.2.8 Tolerance of bottle head height（which should meet the requirements of drawings and technical documents）is ±0.3mm

4.2.9 Bottle Body Thickness

For bottles that need not to be sprayed, the bottle body thickness≧1.5mm (irregular shaped bottles refer to drawings and technical documents): for bottles applied with cold or hot end coating, the body thickness≧1.2mm. Tolerances for special products can be determined in accordance with clients'requirements.

4.2.10 Bottle Bottom Thickness

For those whose full-container capacities are below 150ml (including 150ml) it should be more than 2mm; for those above 150ml (excluding 150ml) it should be more than 3mm. Tolerances for special products can be determined in accordance with clients’ requirements.

4.2.11 Thickness proportion of one bottle should be less than 2:1

4.3 Appearance Quality

Bottle appearance quality need to meet requirements in table 3.

Table 3 Appearance Quality

Item Name				Index
Mouth Flatness，mm		Mouth OD mm	≦60	≦0.4
			≦90	≦0.6
			>90	≦0.8
			≦60	≦0.6
			≦90	≦0.8
			>90	≦1
Body Joviality,mm				≦（0.5+0.01）×2 In the formula：D——body diameter，mm
Mouth Defects	Mouth Spikes			Not allowed
	Defects on the sealing surface that affect the sealing performance			Not allowed
	Mouth screw defects			Not allowed
	Apparent defects on mouth convex ring			Not allowed
	The mouth concaves in and is without an inner stopper			Allowed
	The mouth concaves in in a degree that affects the sealing performance			Not allowed
Stoned	Diameter more than 1.5mm			Not allowed
	Diameter between 0.3mm~1.5mm, no cracks around, not more than			2
	Diameter below 0.3mm, visible every square centimeter not more than			5
	On the bottle mouth			Not allowed
Crack	Refractive			Not allowed
	Slight crack on the sealing surface(demanded by vacuum leakproofness)			Not allowed
	Slight crack on the sealing surface( not demanded by vacuum leakproofness)			Allowed
Bubble	Diameter more than 5mm			Not allowed
	Diameter between 2mm and 5mm, not more than			2
	Diameter between 1mm and 2mm, not more than			3
	Diameter between 0.3mm and 1mm, visible every square centimeter, not more than			5
	Diameter below 0.3mm			Unlimited
	Cracked bubbles、surface thin bubbles			Not allowed
	Bubbles on sealing surface			Not allowed

4.4 The physical and chemical properties should meet requirements in table 4

Table 4 Physical and Chemical Properties

Item Name		Index
Internal Pressure Resistance，MPa	Inflation bottle no less than	1.2
	Non-inflation bottle no less than	0.5
Thermal Shock Resistance（rapid temperature change when heated or coldened),℃	Sterilization under normal temperature	≧35
	Sterilization under high temperature	≧42
Internal Stress,Level		Actual stress≦4
Water Erosion Resistance Performance,Level		≦HC3

5 Test Method

5． 1 Specification

5．1．1 Capacity

Use a weighing apparatus whose sensitivity is 1g to weigh empty bottles. Then pour in water of indoor temperature and weigh again. Minus the former from the latter value and convert the unit to ml (1g weight of water is close to 1ml).

5．1．2 Sizes

5．1．2．1 Body OD

Measure the middle part of body with a slide caliper through any angles of the same level (quantitative detection), then calculate the body OD by averaging the max. and min. value.

5．1．2．2 Bottle Height

Measure with a height gage (quantitative detection) or with a limit gauge (qualitative detection).

5．1．2．3 Bottle head height (top of mouth）, measure with a height gauge or slide caliper

5．1．2．4 Mouth OD（Screw OD）

Measure with a slide caliper (quantitative detection) or with a limit gauge (qualitative detection).

5．1．2．5 Mouth (Neck) ID

Measure with a special inserting gauge or caliper. The insertion depth of bottle ID gauge should be no less than the length of inner stopper or the insertion depth of filling tube.

5．1．2．6 Thickness of The Wall and Bottom

Measure with thickness gauge or cut the bottle in two and measure with slide caliper.

5．1．2．7 Bottom Thickness Proportion of One Bottle

Use a measuring apparatus to find the proportion of the thickest and the thinnest parts of one bottle bottom.

5．1．2．8 Deviation of Vertical Axis

In accordance with GB8452-1987.

5．2 Appearance Quality

5．2．1 Body Ovality

Measure with a slide caliper (quantitative detection) or with a limit gauge (qualitative detection).

5．2．2 Unevenness of Mouth Surface

Measure with a plug gauge (qualitative detection) or with a dial gauge (stationary detection).

5．2．3 Parallelism Measuring of Mouth and Bottom Surface

Measure with a height caliper; divide the minimum value from the maximum value and you’ll get the parallelism.

5．2．4 Other Appearance Items

Visually estimate, or use a 10× scale magnifying glass to measure if necessary.

5．3 Physical and Chemical Performance

5．3．1 Inner Pressure Resistance

In accordance with GB/T4546-1998

5．3．2 Thermal Shock Resistance

In accordance with GB/T4547-1991.

5．3．3 Internal Stress

In accordance with GB/T4545-1984

5．3．4 Water Erosion Resistance

In accordance with GB/T4548-1995.

6 Inspection Rules

6．1 Products have to be inspected and approved by the inspection department of the manufacturing factory before they are put into market with a Product Qualification Certificate.

6．2 Product inspection include factory inspection and type inspection.

6．3 Factory Inspection

6．3．1 Factory inspection items are 4.2，4.3.

6．3．2 Sampling Scheme: In accordance with GB2828-1987. Adopt common inspection level II and examine the sampled products in normal procedures. Inspection items and acceptable quality level (AQL) refer to table 5.

Table 5 Factory Inspection Items

Category	Inspection Item	Acceptable Quality Level（AQL）
Specification	Capacity, height, thickness ratio, vertical axis deviation, bottle mouth OD, mouth ID	2.5
Specification	Thickness, bottle neck	4.0
Appearance Quality	Unevenness of mouth surface, parallelism of mouth and bottom surface, body Ovality, mouth defects, cracks, inner wall defects, deformations	2.5
Appearance Quality	Stoned, bubble, body surface	6.5

6．3．3 Factory inspection rules are negotiable with clients

6．4 Type Inspection

6．4．1 Type inspection items are all technical requirement items

6．4．2 Generally speaking, type inspection should be conducted at least once a year. In the following conditions type inspection has to be conducted too

a) Trial manufacturing evaluation of new or old products when they are transferred to be manufactured in a new factory;

b) When formally put into production, if any changes are implemented on structure, material or craftsmanship and may affect product performance;

c) Manufacturing of the product has been suspended for over 3 months whatever the reasons are and plan to be restored；

d) Result of factory inspection differs much from that of last type inspection;

e) When state quality supervision bureau suggests to do type inspection.

6．4．3 Sampling Scheme：In accordance with GB2829-1987. Adopt level I single sampling scheme. Inspection items and rejection quality level refer to table 6

Table 6 Type Inspection Items

Category	Item	Rejection Quality Level (RQL)	Array [Ac Rc]
Specification	Capacity, height, thickness ratio, vertical axis deviation, bottle mouth OD, mouth ID	40	[1， 2]
Specification	Thickness, bottle neck	50	[1， 2]
Appearance Quality	Unevenness of mouth surface, parallelism of mouth and bottom surface, body Ovality, mouth defects, cracks, inner wall defects, deformations	40	[1， 2]
Appearance Quality	Stoned, bubble, body surface	65	[2， 3]
Physical and Chemical Performance		40	[1， 2]