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1.Common problems of corrugated tube

Q:Why does the PP corrugated tube have white substance precipitated out after long storage?

A: The high content of flame retardant will cause the flame retardant to separate out for a lona timeThis is a normal phenomenon in the industry and does not affect the performance of the PP corrugatedtube.it can be used with confidence

Q:Why is the length of PA corrugated tube longer when stored in places with high air humidity?

A: The material of PA corrugated tube is mainly nylon material. Nylon material is easy to absorbwater and arow longer. lt is easier to absorb water and grow when stored in a place with hiah air humidityNylon needs 1-3 months to balance the moisture absorption, and the moisture absorotion can reach2.5% of the total weight. We recommend storing the product in an environment with a humidity of 55-75%(15'℃-25°C)Store the product for at least 30 days before use

Q:To test the flame retardancy of the corrugated tube, is it to burn the pipe directly or use a test block?

A: According to UL94, 2408, 8410 flame retardant standards, the flame retardant test of corrugatedtube should use sample blocks

Q:Whyis the PA corrugated tube harderin winter?

A: Because of the low temperature and low humidity in winter, the PA corrugated pipe is easy to bedehydrated,resulting in the overall rigidity of the corrugated pipe.

2．Heat Shrink Tube FAQ

Q: How to choose heat shrink tool and pay attention to the problem？

A: A uses an oven; B uses an industrial hot blower;C uses bolling water. After a lot ofexperiments, we found that the heat shrinkable tube producedbyour company shrinks quickly and can save energy for customers. lt is recommended to choose the oven (there are twotypes ofsealed thermostat andtunnel oven). Thetemperature can be set at 120%cw150c,and the shrink ime of large quantities of casings together is about 3~5 minutes; use industriahot air blower The barrel shrinkage time is generally more than 3 seconds, and the hot blower can exceed 200'C at high temperalures. The blower mouthmust be more than 2cm away from the sleeve to avoid scorching the sleeve: The shrinkage method used in boiing water is mainly because somecustomers' products cannot be soaked in water to avoid customers Products are oxidized, such as wires for LcD appliances.A/B two heat shrinkagemethods. For longer sleeves, attention must be paid to the exhaust ofthe sleeve. lt is bestto shrink from one end to the other to avoid bubbling aftertheair seal shrinks.

Q: How to store and transport heat shrinkable materials?

A: The heat-shrinkable product should be kept away from direct sunlight or the ambient temperature exceeds 60'c during storage andtransportation. When the ambient temperature exceeds 60°c, the heat-shrinkable product may partially shrink

Q:How to accurately detect theinner diameter of the heat shrinkable tube?

A: The plug gauge (or mandrel) is commonly used. Put the plug gauge into the tube. There is no gap around itvisually.The mandrel should be easyto putin and out of the tube.The outer diameter ofthe plug gauge is the inner diameter ofthe casing.The inner diameter value ofthe heat shrinkable tubes usually only kept one digit after the decimal point (in mm), and it is also useful for proiection only equipment detection.An empiricalformula formeasuring the inner diameter of a larger specification casing: iner diameter * folded diameter + 157 (where: folded diameter refers to the width ofthecasing when it is compressed in half)

Q: How to accurately detect the wall thickness of the heat shrinkable tube?

A: The professional and accurate method uses wall thickness gauges or projectors to check, which can avoid human error. Heat shrinkage itselfhas a certain degree of flexibility,ltis generally used to use vernier calpers to measure, butthe measurement process needs to be mastered and theweight ofthe method it willobviously affect the test results. in the heat shrinkable tube wallthickness industry, the average wallthickness is calculated(average wall thickness = (highest point value + lowest pointvalwe)/2, and the concentricity rate of its wall thickness is 270%, concentric Rate=lowestpointvalue/hiqhest pointvaluex100%

Q: How to calculate the axial shrinkage rate of heat shrinkable tube?

A: The formula for calculating the shrinkage rate in the axial direction (length direction) ofthe casing: shrinkage rate = (length before fullycontractedlength)before shrinkage x100%

Q: Why is the number of meters often too short after cutting the heat shrinkable tube?

A: After cuting the casing, the customer found that there are a few phenomena, generally it is tens ofmeters or more according to the number ofcut sections. This is a normal ohenomenon, The reason is for example: 5000m each seclion cuts 10mm, a totalof 500.000 seqment, Under normalcircumstances, the size ofthe cut pipe is controled at 10.1m~10.5mm, so thatthe required casing lenath is calculated acording to the actual situation.500000 sections x 10.1mm=5050mor50000 sections x10.5mm=5250m, plus the loss when the pipe is abnormal, Generaly,it takes about 5050m-5250mof casing pipe to cut500,000 seclions, so ifa 5000m pipe is used for cuting, there wilbe a phenomenon oftube shortage (except for the caseofinsuficientpackage volume).

3、Common problems of nylon cable ties

Q:Why are cable ties easy to break in winter?

A: Because of the low temperature and low humidity in winter, it is easy to cause the dehydrationphenomenon of the nylon cable tie, which causes the cable tie to become brittle and easy to break.

Q:Why do cable ties tend to have insufficient tension in summer?

A: Because of the high temperature and high humidity in summer, the more water absorption of thenylon cable tie, the softer the cable tie will be, and the tension will be smaller.

Q:How to store cable ties in summer and winter?

A: The storage environment requires protection from rain and direct sunlight, temperature controlat 5-45°℃ (control at -5-45°C in cold areas), and relative humidity at 30-90% to prevent product moistureoss or dampness and hardness ,The tensile force changes and cannot be used normally.

Q:What is the reason for the tendency to reverse teeth during the use of cable ties?

A: The more water absorption of the nylon cable tie, the softer the cable tie will be, and the pullingforce will be smaller,which is easy to cause anti-tooth phenomenon.