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General properties of paper

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1. Tensile strength
refers to the maximum tension that paper or paperboard can withstand; It is expressed by the load when the paper sample is broken measured by the standard sample with a width of 15mm. Generally, the tensile strength of paper includes transverse tensile strength and longitudinal tensile strength
tensile strength has a very important influence on the printing paper of high-speed rotary printing press
breaking length:
A. definition: refers to the tensile strength of the paper
B. the main factors affecting the fracture length are: fiber adhesion; Average fiber length
2. Folding resistance
(1) definition: the number of times the paper is folded back and forth 180 degrees until it breaks
paper folding resistance is divided into longitudinal folding resistance and transverse folding resistance; Banknote paper, map paper and book cover paper have high requirements for folding resistance
(2) factors affecting folding resistance:
fiber length, binding force, fiber arrangement in the paper, strength and flexibility; Quantity, thickness, tightness and water content
3. Burst resistance
(1) definition: the maximum pressure that the paper can bear when it is pressurized at a constant speed until it breaks under a certain area
(2) bursting strength is a composite function of tensile strength and elongation; Bag paper, packaging paper and box making paperboard have high requirements for burst resistance
4. Tearing degree
refers to the force required to tear the paper at a certain distance
the factors affecting the tearing degree are mainly the average length of the fiber, followed by the fiber adhesion, fiber arrangement direction, fiber strength and fiber interweaving
generally, the transverse tear of paper is greater than the longitudinal tear
5. Stiffness
the stiffness of the paper is the property of the paper to resist bending, that is, rigidity, which also indirectly indicates its softness.

quantification: the mass per unit area of paper and paperboard measured according to the specified test method,
sampling size is 100cm ², Unit: G

tightness: the quantity of the sample divided by the thickness, in g /cm ³;

loose thickness: another indicator of the density of paper,
it refers to the volume of paper with a certain weight, that is, the reciprocal of tightness, and the unit is cm ³/g;

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tensile strength: the maximum tensile force that can be matured per unit section area of paper or paperboard,
sampling size: length ≥ 250mm, width 15mm, unit kn /M> the length of the broken paper due to the weight of the paper itself. The sampling size is the same as the tensile strength. Unit: m or km

elongation: refers to the ratio of the growth value of paper or paperboard under external tension until it breaks to the original length of the sample, expressed in percentage. The sampling size is the same as above, in%

paper tensile energy absorption: it represents the ability of paper to absorb energy under tension. In fact, it represents the stress-strain property of paper, that is, the tensile property of paper. Unit: J /M ²

ring compression: ring compression strength refers to the maximum force that a sample of a certain size can bear before being crushed by inserting it into the sample seat to form a ring shape and pressing between the upper and lower pressing plates
sampling size: 152 (± 0.2) mm × 12.7 (± 0.1) mm
unit: ring pressure strength unit: kn /m, ring pressure index unit: n · M /g

for flat pressing, do you know whether LZ wants to ask for flat pressing of corrugated base paper or honeycomb paperboard

edge pressure: the compressive strength of the vertical edge of the paperboard
sampling size: 25mm × 100mm unit: n /M

stiffness: the force or torque required to bend a specimen of specified size clamped at one end to an angle of 15 °
sampling size: 38 (± 0.2) mm × 70mm unit: Mn or Mn · m

burst resistance: the maximum pressure that the paper or paperboard can withstand in a uniform increase per unit area
sampling size: paper: 70mm × 70mm paperboard: 100mm × 100mm
unit: kPa

tearing degree: the average value of the force required to tear the pre cut paper or paperboard to a certain length. (divided into transverse tear and longitudinal tear)
sampling size: 63 (± 0.5) mm × 50 (± 2) mm
unit: Mn

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General properties of paper

by admin
0 comment

1. Tensile strength
refers to the maximum tension that paper or paperboard can withstand; It is expressed by the load when the paper sample is broken measured by the standard sample with a width of 15mm. Generally, the tensile strength of paper includes transverse tensile strength and longitudinal tensile strength
tensile strength has a very important influence on the printing paper of high-speed rotary printing press
breaking length:
A. definition: refers to the tensile strength of the paper
B. the main factors affecting the fracture length are: fiber adhesion; Average fiber length
2. Folding resistance
(1) definition: the number of times the paper is folded back and forth 180 degrees until it breaks
paper folding resistance is divided into longitudinal folding resistance and transverse folding resistance; Banknote paper, map paper and book cover paper have high requirements for folding resistance
(2) factors affecting folding resistance:
fiber length, binding force, fiber arrangement in the paper, strength and flexibility; Quantity, thickness, tightness and water content
3. Burst resistance
(1) definition: the maximum pressure that the paper can bear when it is pressurized at a constant speed until it breaks under a certain area
(2) bursting strength is a composite function of tensile strength and elongation; Bag paper, packaging paper and box making paperboard have high requirements for burst resistance
4. Tearing degree
refers to the force required to tear the paper at a certain distance
the factors affecting the tearing degree are mainly the average length of the fiber, followed by the fiber adhesion, fiber arrangement direction, fiber strength and fiber interweaving
generally, the transverse tear of paper is greater than the longitudinal tear
5. Stiffness
the stiffness of the paper is the property of the paper to resist bending, that is, rigidity, which also indirectly indicates its softness.

quantification: the mass per unit area of paper and paperboard measured according to the specified test method,
sampling size is 100cm ², Unit: G

tightness: the quantity of the sample divided by the thickness, in g /cm ³;

loose thickness: another indicator of the density of paper,
it refers to the volume of paper with a certain weight, that is, the reciprocal of tightness, and the unit is cm ³/g;

banner

tensile strength: the maximum tensile force that can be matured per unit section area of paper or paperboard,
sampling size: length ≥ 250mm, width 15mm, unit kn /M> the length of the broken paper due to the weight of the paper itself. The sampling size is the same as the tensile strength. Unit: m or km

elongation: refers to the ratio of the growth value of paper or paperboard under external tension until it breaks to the original length of the sample, expressed in percentage. The sampling size is the same as above, in%

paper tensile energy absorption: it represents the ability of paper to absorb energy under tension. In fact, it represents the stress-strain property of paper, that is, the tensile property of paper. Unit: J /M ²

ring compression: ring compression strength refers to the maximum force that a sample of a certain size can bear before being crushed by inserting it into the sample seat to form a ring shape and pressing between the upper and lower pressing plates
sampling size: 152 (± 0.2) mm × 12.7 (± 0.1) mm
unit: ring pressure strength unit: kn /m, ring pressure index unit: n · M /g

for flat pressing, do you know whether LZ wants to ask for flat pressing of corrugated base paper or honeycomb paperboard

edge pressure: the compressive strength of the vertical edge of the paperboard
sampling size: 25mm × 100mm unit: n /M

stiffness: the force or torque required to bend a specimen of specified size clamped at one end to an angle of 15 °
sampling size: 38 (± 0.2) mm × 70mm unit: Mn or Mn · m

burst resistance: the maximum pressure that the paper or paperboard can withstand in a uniform increase per unit area
sampling size: paper: 70mm × 70mm paperboard: 100mm × 100mm
unit: kPa

tearing degree: the average value of the force required to tear the pre cut paper or paperboard to a certain length. (divided into transverse tear and longitudinal tear)
sampling size: 63 (± 0.5) mm × 50 (± 2) mm
unit: Mn

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